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) 2018-2020 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  49 {
  50         struct sk_buff *skb;
  51         struct ieee80211_hdr *hdr;
  52
  53         skb_queue_walk(&tx->skbs, skb) {
  54                 hdr = (struct ieee80211_hdr *) skb->data;
  55                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  56         }
  57 }
  58
  59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  60                              int rate, int erp, int short_preamble,
  61                              int shift)
  62 {
  63         int dur;
  64
  65         /* calculate duration (in microseconds, rounded up to next higher
  66          * integer if it includes a fractional microsecond) to send frame of
  67          * len bytes (does not include FCS) at the given rate. Duration will
  68          * also include SIFS.
  69          *
  70          * rate is in 100 kbps, so divident is multiplied by 10 in the
  71          * DIV_ROUND_UP() operations.
  72          *
  73          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  74          * is assumed to be 0 otherwise.
  75          */
  76
  77         if (band == NL80211_BAND_5GHZ || erp) {
  78                 /*
  79                  * OFDM:
  80                  *
  81                  * N_DBPS = DATARATE x 4
  82                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  83                  *      (16 = SIGNAL time, 6 = tail bits)
  84                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  85                  *
  86                  * T_SYM = 4 usec
  87                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  88                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  89                  *      signal ext = 6 usec
  90                  */
  91                 dur = 16; /* SIFS + signal ext */
  92                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  93                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  94
  95                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  96                  *  * times 4 for 5 MHz
  97                  *  * times 2 for 10 MHz
  98                  */
  99                 dur *= 1 << shift;
 100
 101                 /* rates should already consider the channel bandwidth,
 102                  * don't apply divisor again.
 103                  */
 104                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 105                                         4 * rate); /* T_SYM x N_SYM */
 106         } else {
 107                 /*
 108                  * 802.11b or 802.11g with 802.11b compatibility:
 109                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 110                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 111                  *
 112                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 113                  * aSIFSTime = 10 usec
 114                  * aPreambleLength = 144 usec or 72 usec with short preamble
 115                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 116                  */
 117                 dur = 10; /* aSIFSTime = 10 usec */
 118                 dur += short_preamble ? (72 + 24) : (144 + 48);
 119
 120                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 121         }
 122
 123         return dur;
 124 }
 125
 126 /* Exported duration function for driver use */
 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 128                                         struct ieee80211_vif *vif,
 129                                         enum nl80211_band band,
 130                                         size_t frame_len,
 131                                         struct ieee80211_rate *rate)
 132 {
 133         struct ieee80211_sub_if_data *sdata;
 134         u16 dur;
 135         int erp, shift = 0;
 136         bool short_preamble = false;
 137
 138         erp = 0;
 139         if (vif) {
 140                 sdata = vif_to_sdata(vif);
 141                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 142                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 143                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 144                 shift = ieee80211_vif_get_shift(vif);
 145         }
 146
 147         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 148                                        short_preamble, shift);
 149
 150         return cpu_to_le16(dur);
 151 }
 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 153
 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 155                               struct ieee80211_vif *vif, size_t frame_len,
 156                               const struct ieee80211_tx_info *frame_txctl)
 157 {
 158         struct ieee80211_local *local = hw_to_local(hw);
 159         struct ieee80211_rate *rate;
 160         struct ieee80211_sub_if_data *sdata;
 161         bool short_preamble;
 162         int erp, shift = 0, bitrate;
 163         u16 dur;
 164         struct ieee80211_supported_band *sband;
 165
 166         sband = local->hw.wiphy->bands[frame_txctl->band];
 167
 168         short_preamble = false;
 169
 170         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 171
 172         erp = 0;
 173         if (vif) {
 174                 sdata = vif_to_sdata(vif);
 175                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 176                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 177                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 178                 shift = ieee80211_vif_get_shift(vif);
 179         }
 180
 181         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 182
 183         /* CTS duration */
 184         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 185                                        erp, short_preamble, shift);
 186         /* Data frame duration */
 187         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 188                                         erp, short_preamble, shift);
 189         /* ACK duration */
 190         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 191                                         erp, short_preamble, shift);
 192
 193         return cpu_to_le16(dur);
 194 }
 195 EXPORT_SYMBOL(ieee80211_rts_duration);
 196
 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 198                                     struct ieee80211_vif *vif,
 199                                     size_t frame_len,
 200                                     const struct ieee80211_tx_info *frame_txctl)
 201 {
 202         struct ieee80211_local *local = hw_to_local(hw);
 203         struct ieee80211_rate *rate;
 204         struct ieee80211_sub_if_data *sdata;
 205         bool short_preamble;
 206         int erp, shift = 0, bitrate;
 207         u16 dur;
 208         struct ieee80211_supported_band *sband;
 209
 210         sband = local->hw.wiphy->bands[frame_txctl->band];
 211
 212         short_preamble = false;
 213
 214         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 215         erp = 0;
 216         if (vif) {
 217                 sdata = vif_to_sdata(vif);
 218                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 219                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 220                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 221                 shift = ieee80211_vif_get_shift(vif);
 222         }
 223
 224         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 225
 226         /* Data frame duration */
 227         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 228                                        erp, short_preamble, shift);
 229         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 230                 /* ACK duration */
 231                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                                 erp, short_preamble, shift);
 233         }
 234
 235         return cpu_to_le16(dur);
 236 }
 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 238
 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 240 {
 241         struct ieee80211_local *local = sdata->local;
 242         struct ieee80211_vif *vif = &sdata->vif;
 243         struct fq *fq = &local->fq;
 244         struct ps_data *ps = NULL;
 245         struct txq_info *txqi;
 246         struct sta_info *sta;
 247         int i;
 248
 249         local_bh_disable();
 250         spin_lock(&fq->lock);
 251
 252         if (sdata->vif.type == NL80211_IFTYPE_AP)
 253                 ps = &sdata->bss->ps;
 254
 255         sdata->vif.txqs_stopped[ac] = false;
 256
 257         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 258                 if (sdata != sta->sdata)
 259                         continue;
 260
 261                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 262                         struct ieee80211_txq *txq = sta->sta.txq[i];
 263
 264                         if (!txq)
 265                                 continue;
 266
 267                         txqi = to_txq_info(txq);
 268
 269                         if (ac != txq->ac)
 270                                 continue;
 271
 272                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 273                                                 &txqi->flags))
 274                                 continue;
 275
 276                         spin_unlock(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock(&fq->lock);
 279                 }
 280         }
 281
 282         if (!vif->txq)
 283                 goto out;
 284
 285         txqi = to_txq_info(vif->txq);
 286
 287         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 288             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 289                 goto out;
 290
 291         spin_unlock(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         local_bh_enable();
 295         return;
 296 out:
 297         spin_unlock(&fq->lock);
 298         local_bh_enable();
 299 }
 300
 301 static void
 302 __releases(&local->queue_stop_reason_lock)
 303 __acquires(&local->queue_stop_reason_lock)
 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         int n_acs = IEEE80211_NUM_ACS;
 308         int i;
 309
 310         rcu_read_lock();
 311
 312         if (local->hw.queues < IEEE80211_NUM_ACS)
 313                 n_acs = 1;
 314
 315         for (i = 0; i < local->hw.queues; i++) {
 316                 if (local->queue_stop_reasons[i])
 317                         continue;
 318
 319                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 320                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 321                         int ac;
 322
 323                         for (ac = 0; ac < n_acs; ac++) {
 324                                 int ac_queue = sdata->vif.hw_queue[ac];
 325
 326                                 if (ac_queue == i ||
 327                                     sdata->vif.cab_queue == i)
 328                                         __ieee80211_wake_txqs(sdata, ac);
 329                         }
 330                 }
 331                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 332         }
 333
 334         rcu_read_unlock();
 335 }
 336
 337 void ieee80211_wake_txqs(unsigned long data)
 338 {
 339         struct ieee80211_local *local = (struct ieee80211_local *)data;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 343         _ieee80211_wake_txqs(local, &flags);
 344         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 345 }
 346
 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 348 {
 349         struct ieee80211_sub_if_data *sdata;
 350         int n_acs = IEEE80211_NUM_ACS;
 351
 352         if (local->ops->wake_tx_queue)
 353                 return;
 354
 355         if (local->hw.queues < IEEE80211_NUM_ACS)
 356                 n_acs = 1;
 357
 358         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 359                 int ac;
 360
 361                 if (!sdata->dev)
 362                         continue;
 363
 364                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 365                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 366                         continue;
 367
 368                 for (ac = 0; ac < n_acs; ac++) {
 369                         int ac_queue = sdata->vif.hw_queue[ac];
 370
 371                         if (ac_queue == queue ||
 372                             (sdata->vif.cab_queue == queue &&
 373                              local->queue_stop_reasons[ac_queue] == 0 &&
 374                              skb_queue_empty(&local->pending[ac_queue])))
 375                                 netif_wake_subqueue(sdata->dev, ac);
 376                 }
 377         }
 378 }
 379
 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 381                                    enum queue_stop_reason reason,
 382                                    bool refcounted,
 383                                    unsigned long *flags)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386
 387         trace_wake_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (!refcounted) {
 396                 local->q_stop_reasons[queue][reason] = 0;
 397         } else {
 398                 local->q_stop_reasons[queue][reason]--;
 399                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 400                         local->q_stop_reasons[queue][reason] = 0;
 401         }
 402
 403         if (local->q_stop_reasons[queue][reason] == 0)
 404                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 405
 406         if (local->queue_stop_reasons[queue] != 0)
 407                 /* someone still has this queue stopped */
 408                 return;
 409
 410         if (skb_queue_empty(&local->pending[queue])) {
 411                 rcu_read_lock();
 412                 ieee80211_propagate_queue_wake(local, queue);
 413                 rcu_read_unlock();
 414         } else
 415                 tasklet_schedule(&local->tx_pending_tasklet);
 416
 417         /*
 418          * Calling _ieee80211_wake_txqs here can be a problem because it may
 419          * release queue_stop_reason_lock which has been taken by
 420          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 421          * release someone's lock, but it is fine because all the callers of
 422          * __ieee80211_wake_queue call it right before releasing the lock.
 423          */
 424         if (local->ops->wake_tx_queue) {
 425                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 426                         tasklet_schedule(&local->wake_txqs_tasklet);
 427                 else
 428                         _ieee80211_wake_txqs(local, flags);
 429         }
 430 }
 431
 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 433                                     enum queue_stop_reason reason,
 434                                     bool refcounted)
 435 {
 436         struct ieee80211_local *local = hw_to_local(hw);
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 440         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 441         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 442 }
 443
 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 445 {
 446         ieee80211_wake_queue_by_reason(hw, queue,
 447                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 448                                        false);
 449 }
 450 EXPORT_SYMBOL(ieee80211_wake_queue);
 451
 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 453                                    enum queue_stop_reason reason,
 454                                    bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         struct ieee80211_sub_if_data *sdata;
 458         int n_acs = IEEE80211_NUM_ACS;
 459
 460         trace_stop_queue(local, queue, reason);
 461
 462         if (WARN_ON(queue >= hw->queues))
 463                 return;
 464
 465         if (!refcounted)
 466                 local->q_stop_reasons[queue][reason] = 1;
 467         else
 468                 local->q_stop_reasons[queue][reason]++;
 469
 470         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 471                 return;
 472
 473         if (local->hw.queues < IEEE80211_NUM_ACS)
 474                 n_acs = 1;
 475
 476         rcu_read_lock();
 477         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 478                 int ac;
 479
 480                 if (!sdata->dev)
 481                         continue;
 482
 483                 for (ac = 0; ac < n_acs; ac++) {
 484                         if (sdata->vif.hw_queue[ac] == queue ||
 485                             sdata->vif.cab_queue == queue) {
 486                                 if (!local->ops->wake_tx_queue) {
 487                                         netif_stop_subqueue(sdata->dev, ac);
 488                                         continue;
 489                                 }
 490                                 spin_lock(&local->fq.lock);
 491                                 sdata->vif.txqs_stopped[ac] = true;
 492                                 spin_unlock(&local->fq.lock);
 493                         }
 494                 }
 495         }
 496         rcu_read_unlock();
 497 }
 498
 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 500                                     enum queue_stop_reason reason,
 501                                     bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504         unsigned long flags;
 505
 506         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 507         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 512 {
 513         ieee80211_stop_queue_by_reason(hw, queue,
 514                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                        false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queue);
 518
 519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 520                                struct sk_buff *skb)
 521 {
 522         struct ieee80211_hw *hw = &local->hw;
 523         unsigned long flags;
 524         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 525         int queue = info->hw_queue;
 526
 527         if (WARN_ON(!info->control.vif)) {
 528                 ieee80211_free_txskb(&local->hw, skb);
 529                 return;
 530         }
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 534                                false);
 535         __skb_queue_tail(&local->pending[queue], skb);
 536         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 537                                false, &flags);
 538         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 539 }
 540
 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 542                                 struct sk_buff_head *skbs)
 543 {
 544         struct ieee80211_hw *hw = &local->hw;
 545         struct sk_buff *skb;
 546         unsigned long flags;
 547         int queue, i;
 548
 549         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 550         while ((skb = skb_dequeue(skbs))) {
 551                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 552
 553                 if (WARN_ON(!info->control.vif)) {
 554                         ieee80211_free_txskb(&local->hw, skb);
 555                         continue;
 556                 }
 557
 558                 queue = info->hw_queue;
 559
 560                 __ieee80211_stop_queue(hw, queue,
 561                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 562                                 false);
 563
 564                 __skb_queue_tail(&local->pending[queue], skb);
 565         }
 566
 567         for (i = 0; i < hw->queues; i++)
 568                 __ieee80211_wake_queue(hw, i,
 569                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570                         false, &flags);
 571         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 572 }
 573
 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 575                                      unsigned long queues,
 576                                      enum queue_stop_reason reason,
 577                                      bool refcounted)
 578 {
 579         struct ieee80211_local *local = hw_to_local(hw);
 580         unsigned long flags;
 581         int i;
 582
 583         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 584
 585         for_each_set_bit(i, &queues, hw->queues)
 586                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 587
 588         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 589 }
 590
 591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 592 {
 593         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 594                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 595                                         false);
 596 }
 597 EXPORT_SYMBOL(ieee80211_stop_queues);
 598
 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int ret;
 604
 605         if (WARN_ON(queue >= hw->queues))
 606                 return true;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 610                        &local->queue_stop_reasons[queue]);
 611         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 612         return ret;
 613 }
 614 EXPORT_SYMBOL(ieee80211_queue_stopped);
 615
 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 617                                      unsigned long queues,
 618                                      enum queue_stop_reason reason,
 619                                      bool refcounted)
 620 {
 621         struct ieee80211_local *local = hw_to_local(hw);
 622         unsigned long flags;
 623         int i;
 624
 625         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 626
 627         for_each_set_bit(i, &queues, hw->queues)
 628                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 629
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 634 {
 635         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 636                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 637                                         false);
 638 }
 639 EXPORT_SYMBOL(ieee80211_wake_queues);
 640
 641 static unsigned int
 642 ieee80211_get_vif_queues(struct ieee80211_local *local,
 643                          struct ieee80211_sub_if_data *sdata)
 644 {
 645         unsigned int queues;
 646
 647         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 648                 int ac;
 649
 650                 queues = 0;
 651
 652                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 653                         queues |= BIT(sdata->vif.hw_queue[ac]);
 654                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 655                         queues |= BIT(sdata->vif.cab_queue);
 656         } else {
 657                 /* all queues */
 658                 queues = BIT(local->hw.queues) - 1;
 659         }
 660
 661         return queues;
 662 }
 663
 664 void __ieee80211_flush_queues(struct ieee80211_local *local,
 665                               struct ieee80211_sub_if_data *sdata,
 666                               unsigned int queues, bool drop)
 667 {
 668         if (!local->ops->flush)
 669                 return;
 670
 671         /*
 672          * If no queue was set, or if the HW doesn't support
 673          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 674          */
 675         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 676                 queues = ieee80211_get_vif_queues(local, sdata);
 677
 678         ieee80211_stop_queues_by_reason(&local->hw, queues,
 679                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 680                                         false);
 681
 682         drv_flush(local, sdata, queues, drop);
 683
 684         ieee80211_wake_queues_by_reason(&local->hw, queues,
 685                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 686                                         false);
 687 }
 688
 689 void ieee80211_flush_queues(struct ieee80211_local *local,
 690                             struct ieee80211_sub_if_data *sdata, bool drop)
 691 {
 692         __ieee80211_flush_queues(local, sdata, 0, drop);
 693 }
 694
 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 696                                struct ieee80211_sub_if_data *sdata,
 697                                enum queue_stop_reason reason)
 698 {
 699         ieee80211_stop_queues_by_reason(&local->hw,
 700                                         ieee80211_get_vif_queues(local, sdata),
 701                                         reason, true);
 702 }
 703
 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 705                                struct ieee80211_sub_if_data *sdata,
 706                                enum queue_stop_reason reason)
 707 {
 708         ieee80211_wake_queues_by_reason(&local->hw,
 709                                         ieee80211_get_vif_queues(local, sdata),
 710                                         reason, true);
 711 }
 712
 713 static void __iterate_interfaces(struct ieee80211_local *local,
 714                                  u32 iter_flags,
 715                                  void (*iterator)(void *data, u8 *mac,
 716                                                   struct ieee80211_vif *vif),
 717                                  void *data)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 721
 722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 723                 switch (sdata->vif.type) {
 724                 case NL80211_IFTYPE_MONITOR:
 725                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 726                                 continue;
 727                         break;
 728                 case NL80211_IFTYPE_AP_VLAN:
 729                         continue;
 730                 default:
 731                         break;
 732                 }
 733                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 734                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 735                         continue;
 736                 if (ieee80211_sdata_running(sdata) || !active_only)
 737                         iterator(data, sdata->vif.addr,
 738                                  &sdata->vif);
 739         }
 740
 741         sdata = rcu_dereference_check(local->monitor_sdata,
 742                                       lockdep_is_held(&local->iflist_mtx) ||
 743                                       lockdep_rtnl_is_held());
 744         if (sdata &&
 745             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 746              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 747                 iterator(data, sdata->vif.addr, &sdata->vif);
 748 }
 749
 750 void ieee80211_iterate_interfaces(
 751         struct ieee80211_hw *hw, u32 iter_flags,
 752         void (*iterator)(void *data, u8 *mac,
 753                          struct ieee80211_vif *vif),
 754         void *data)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         mutex_lock(&local->iflist_mtx);
 759         __iterate_interfaces(local, iter_flags, iterator, data);
 760         mutex_unlock(&local->iflist_mtx);
 761 }
 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 763
 764 void ieee80211_iterate_active_interfaces_atomic(
 765         struct ieee80211_hw *hw, u32 iter_flags,
 766         void (*iterator)(void *data, u8 *mac,
 767                          struct ieee80211_vif *vif),
 768         void *data)
 769 {
 770         struct ieee80211_local *local = hw_to_local(hw);
 771
 772         rcu_read_lock();
 773         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 774                              iterator, data);
 775         rcu_read_unlock();
 776 }
 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 778
 779 void ieee80211_iterate_active_interfaces_rtnl(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         ASSERT_RTNL();
 788
 789         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 790                              iterator, data);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 793
 794 static void __iterate_stations(struct ieee80211_local *local,
 795                                void (*iterator)(void *data,
 796                                                 struct ieee80211_sta *sta),
 797                                void *data)
 798 {
 799         struct sta_info *sta;
 800
 801         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 802                 if (!sta->uploaded)
 803                         continue;
 804
 805                 iterator(data, &sta->sta);
 806         }
 807 }
 808
 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 810                         void (*iterator)(void *data,
 811                                          struct ieee80211_sta *sta),
 812                         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         rcu_read_lock();
 817         __iterate_stations(local, iterator, data);
 818         rcu_read_unlock();
 819 }
 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 821
 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 825
 826         if (!ieee80211_sdata_running(sdata) ||
 827             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 828                 return NULL;
 829         return &sdata->vif;
 830 }
 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 832
 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 834 {
 835         struct ieee80211_sub_if_data *sdata;
 836
 837         if (!vif)
 838                 return NULL;
 839
 840         sdata = vif_to_sdata(vif);
 841
 842         if (!ieee80211_sdata_running(sdata) ||
 843             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 844                 return NULL;
 845
 846         return &sdata->wdev;
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 849
 850 /*
 851  * Nothing should have been stuffed into the workqueue during
 852  * the suspend->resume cycle. Since we can't check each caller
 853  * of this function if we are already quiescing / suspended,
 854  * check here and don't WARN since this can actually happen when
 855  * the rx path (for example) is racing against __ieee80211_suspend
 856  * and suspending / quiescing was set after the rx path checked
 857  * them.
 858  */
 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 860 {
 861         if (local->quiescing || (local->suspended && !local->resuming)) {
 862                 pr_warn("queueing ieee80211 work while going to suspend\n");
 863                 return false;
 864         }
 865
 866         return true;
 867 }
 868
 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 870 {
 871         struct ieee80211_local *local = hw_to_local(hw);
 872
 873         if (!ieee80211_can_queue_work(local))
 874                 return;
 875
 876         queue_work(local->workqueue, work);
 877 }
 878 EXPORT_SYMBOL(ieee80211_queue_work);
 879
 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 881                                   struct delayed_work *dwork,
 882                                   unsigned long delay)
 883 {
 884         struct ieee80211_local *local = hw_to_local(hw);
 885
 886         if (!ieee80211_can_queue_work(local))
 887                 return;
 888
 889         queue_delayed_work(local->workqueue, dwork, delay);
 890 }
 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 892
 893 static void ieee80211_parse_extension_element(u32 *crc,
 894                                               const struct element *elem,
 895                                               struct ieee802_11_elems *elems)
 896 {
 897         const void *data = elem->data + 1;
 898         u8 len = elem->datalen - 1;
 899
 900         switch (elem->data[0]) {
 901         case WLAN_EID_EXT_HE_MU_EDCA:
 902                 if (len == sizeof(*elems->mu_edca_param_set)) {
 903                         elems->mu_edca_param_set = data;
 904                         if (crc)
 905                                 *crc = crc32_be(*crc, (void *)elem,
 906                                                 elem->datalen + 2);
 907                 }
 908                 break;
 909         case WLAN_EID_EXT_HE_CAPABILITY:
 910                 elems->he_cap = data;
 911                 elems->he_cap_len = len;
 912                 break;
 913         case WLAN_EID_EXT_HE_OPERATION:
 914                 if (len >= sizeof(*elems->he_operation) &&
 915                     len == ieee80211_he_oper_size(data) - 1)
 916                         elems->he_operation = data;
 917                 break;
 918         case WLAN_EID_EXT_UORA:
 919                 if (len == 1)
 920                         elems->uora_element = data;
 921                 break;
 922         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 923                 if (len == 3)
 924                         elems->max_channel_switch_time = data;
 925                 break;
 926         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 927                 if (len == sizeof(*elems->mbssid_config_ie))
 928                         elems->mbssid_config_ie = data;
 929                 break;
 930         case WLAN_EID_EXT_HE_SPR:
 931                 if (len >= sizeof(*elems->he_spr) &&
 932                     len >= ieee80211_he_spr_size(data))
 933                         elems->he_spr = data;
 934                 break;
 935         }
 936 }
 937
 938 static u32
 939 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 940                             struct ieee802_11_elems *elems,
 941                             u64 filter, u32 crc,
 942                             const struct element *check_inherit)
 943 {
 944         const struct element *elem;
 945         bool calc_crc = filter != 0;
 946         DECLARE_BITMAP(seen_elems, 256);
 947         const u8 *ie;
 948
 949         bitmap_zero(seen_elems, 256);
 950
 951         for_each_element(elem, start, len) {
 952                 bool elem_parse_failed;
 953                 u8 id = elem->id;
 954                 u8 elen = elem->datalen;
 955                 const u8 *pos = elem->data;
 956
 957                 if (check_inherit &&
 958                     !cfg80211_is_element_inherited(elem,
 959                                                    check_inherit))
 960                         continue;
 961
 962                 switch (id) {
 963                 case WLAN_EID_SSID:
 964                 case WLAN_EID_SUPP_RATES:
 965                 case WLAN_EID_FH_PARAMS:
 966                 case WLAN_EID_DS_PARAMS:
 967                 case WLAN_EID_CF_PARAMS:
 968                 case WLAN_EID_TIM:
 969                 case WLAN_EID_IBSS_PARAMS:
 970                 case WLAN_EID_CHALLENGE:
 971                 case WLAN_EID_RSN:
 972                 case WLAN_EID_ERP_INFO:
 973                 case WLAN_EID_EXT_SUPP_RATES:
 974                 case WLAN_EID_HT_CAPABILITY:
 975                 case WLAN_EID_HT_OPERATION:
 976                 case WLAN_EID_VHT_CAPABILITY:
 977                 case WLAN_EID_VHT_OPERATION:
 978                 case WLAN_EID_MESH_ID:
 979                 case WLAN_EID_MESH_CONFIG:
 980                 case WLAN_EID_PEER_MGMT:
 981                 case WLAN_EID_PREQ:
 982                 case WLAN_EID_PREP:
 983                 case WLAN_EID_PERR:
 984                 case WLAN_EID_RANN:
 985                 case WLAN_EID_CHANNEL_SWITCH:
 986                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 987                 case WLAN_EID_COUNTRY:
 988                 case WLAN_EID_PWR_CONSTRAINT:
 989                 case WLAN_EID_TIMEOUT_INTERVAL:
 990                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 991                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 992                 case WLAN_EID_CHAN_SWITCH_PARAM:
 993                 case WLAN_EID_EXT_CAPABILITY:
 994                 case WLAN_EID_CHAN_SWITCH_TIMING:
 995                 case WLAN_EID_LINK_ID:
 996                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 997                 case WLAN_EID_RSNX:
 998                 /*
 999                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1000                  * that if the content gets bigger it might be needed more than once
1001                  */
1002                         if (test_bit(id, seen_elems)) {
1003                                 elems->parse_error = true;
1004                                 continue;
1005                         }
1006                         break;
1007                 }
1008
1009                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1010                         crc = crc32_be(crc, pos - 2, elen + 2);
1011
1012                 elem_parse_failed = false;
1013
1014                 switch (id) {
1015                 case WLAN_EID_LINK_ID:
1016                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         elems->lnk_id = (void *)(pos - 2);
1021                         break;
1022                 case WLAN_EID_CHAN_SWITCH_TIMING:
1023                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1024                                 elem_parse_failed = true;
1025                                 break;
1026                         }
1027                         elems->ch_sw_timing = (void *)pos;
1028                         break;
1029                 case WLAN_EID_EXT_CAPABILITY:
1030                         elems->ext_capab = pos;
1031                         elems->ext_capab_len = elen;
1032                         break;
1033                 case WLAN_EID_SSID:
1034                         elems->ssid = pos;
1035                         elems->ssid_len = elen;
1036                         break;
1037                 case WLAN_EID_SUPP_RATES:
1038                         elems->supp_rates = pos;
1039                         elems->supp_rates_len = elen;
1040                         break;
1041                 case WLAN_EID_DS_PARAMS:
1042                         if (elen >= 1)
1043                                 elems->ds_params = pos;
1044                         else
1045                                 elem_parse_failed = true;
1046                         break;
1047                 case WLAN_EID_TIM:
1048                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1049                                 elems->tim = (void *)pos;
1050                                 elems->tim_len = elen;
1051                         } else
1052                                 elem_parse_failed = true;
1053                         break;
1054                 case WLAN_EID_CHALLENGE:
1055                         elems->challenge = pos;
1056                         elems->challenge_len = elen;
1057                         break;
1058                 case WLAN_EID_VENDOR_SPECIFIC:
1059                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1060                             pos[2] == 0xf2) {
1061                                 /* Microsoft OUI (00:50:F2) */
1062
1063                                 if (calc_crc)
1064                                         crc = crc32_be(crc, pos - 2, elen + 2);
1065
1066                                 if (elen >= 5 && pos[3] == 2) {
1067                                         /* OUI Type 2 - WMM IE */
1068                                         if (pos[4] == 0) {
1069                                                 elems->wmm_info = pos;
1070                                                 elems->wmm_info_len = elen;
1071                                         } else if (pos[4] == 1) {
1072                                                 elems->wmm_param = pos;
1073                                                 elems->wmm_param_len = elen;
1074                                         }
1075                                 }
1076                         }
1077                         break;
1078                 case WLAN_EID_RSN:
1079                         elems->rsn = pos;
1080                         elems->rsn_len = elen;
1081                         break;
1082                 case WLAN_EID_ERP_INFO:
1083                         if (elen >= 1)
1084                                 elems->erp_info = pos;
1085                         else
1086                                 elem_parse_failed = true;
1087                         break;
1088                 case WLAN_EID_EXT_SUPP_RATES:
1089                         elems->ext_supp_rates = pos;
1090                         elems->ext_supp_rates_len = elen;
1091                         break;
1092                 case WLAN_EID_HT_CAPABILITY:
1093                         if (elen >= sizeof(struct ieee80211_ht_cap))
1094                                 elems->ht_cap_elem = (void *)pos;
1095                         else
1096                                 elem_parse_failed = true;
1097                         break;
1098                 case WLAN_EID_HT_OPERATION:
1099                         if (elen >= sizeof(struct ieee80211_ht_operation))
1100                                 elems->ht_operation = (void *)pos;
1101                         else
1102                                 elem_parse_failed = true;
1103                         break;
1104                 case WLAN_EID_VHT_CAPABILITY:
1105                         if (elen >= sizeof(struct ieee80211_vht_cap))
1106                                 elems->vht_cap_elem = (void *)pos;
1107                         else
1108                                 elem_parse_failed = true;
1109                         break;
1110                 case WLAN_EID_VHT_OPERATION:
1111                         if (elen >= sizeof(struct ieee80211_vht_operation))
1112                                 elems->vht_operation = (void *)pos;
1113                         else
1114                                 elem_parse_failed = true;
1115                         break;
1116                 case WLAN_EID_OPMODE_NOTIF:
1117                         if (elen > 0)
1118                                 elems->opmode_notif = pos;
1119                         else
1120                                 elem_parse_failed = true;
1121                         break;
1122                 case WLAN_EID_MESH_ID:
1123                         elems->mesh_id = pos;
1124                         elems->mesh_id_len = elen;
1125                         break;
1126                 case WLAN_EID_MESH_CONFIG:
1127                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1128                                 elems->mesh_config = (void *)pos;
1129                         else
1130                                 elem_parse_failed = true;
1131                         break;
1132                 case WLAN_EID_PEER_MGMT:
1133                         elems->peering = pos;
1134                         elems->peering_len = elen;
1135                         break;
1136                 case WLAN_EID_MESH_AWAKE_WINDOW:
1137                         if (elen >= 2)
1138                                 elems->awake_window = (void *)pos;
1139                         break;
1140                 case WLAN_EID_PREQ:
1141                         elems->preq = pos;
1142                         elems->preq_len = elen;
1143                         break;
1144                 case WLAN_EID_PREP:
1145                         elems->prep = pos;
1146                         elems->prep_len = elen;
1147                         break;
1148                 case WLAN_EID_PERR:
1149                         elems->perr = pos;
1150                         elems->perr_len = elen;
1151                         break;
1152                 case WLAN_EID_RANN:
1153                         if (elen >= sizeof(struct ieee80211_rann_ie))
1154                                 elems->rann = (void *)pos;
1155                         else
1156                                 elem_parse_failed = true;
1157                         break;
1158                 case WLAN_EID_CHANNEL_SWITCH:
1159                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1160                                 elem_parse_failed = true;
1161                                 break;
1162                         }
1163                         elems->ch_switch_ie = (void *)pos;
1164                         break;
1165                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1166                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1167                                 elem_parse_failed = true;
1168                                 break;
1169                         }
1170                         elems->ext_chansw_ie = (void *)pos;
1171                         break;
1172                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1173                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1174                                 elem_parse_failed = true;
1175                                 break;
1176                         }
1177                         elems->sec_chan_offs = (void *)pos;
1178                         break;
1179                 case WLAN_EID_CHAN_SWITCH_PARAM:
1180                         if (elen !=
1181                             sizeof(*elems->mesh_chansw_params_ie)) {
1182                                 elem_parse_failed = true;
1183                                 break;
1184                         }
1185                         elems->mesh_chansw_params_ie = (void *)pos;
1186                         break;
1187                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1188                         if (!action ||
1189                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1190                                 elem_parse_failed = true;
1191                                 break;
1192                         }
1193                         elems->wide_bw_chansw_ie = (void *)pos;
1194                         break;
1195                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1196                         if (action) {
1197                                 elem_parse_failed = true;
1198                                 break;
1199                         }
1200                         /*
1201                          * This is a bit tricky, but as we only care about
1202                          * the wide bandwidth channel switch element, so
1203                          * just parse it out manually.
1204                          */
1205                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1206                                               pos, elen);
1207                         if (ie) {
1208                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1209                                         elems->wide_bw_chansw_ie =
1210                                                 (void *)(ie + 2);
1211                                 else
1212                                         elem_parse_failed = true;
1213                         }
1214                         break;
1215                 case WLAN_EID_COUNTRY:
1216                         elems->country_elem = pos;
1217                         elems->country_elem_len = elen;
1218                         break;
1219                 case WLAN_EID_PWR_CONSTRAINT:
1220                         if (elen != 1) {
1221                                 elem_parse_failed = true;
1222                                 break;
1223                         }
1224                         elems->pwr_constr_elem = pos;
1225                         break;
1226                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1227                         /* Lots of different options exist, but we only care
1228                          * about the Dynamic Transmit Power Control element.
1229                          * First check for the Cisco OUI, then for the DTPC
1230                          * tag (0x00).
1231                          */
1232                         if (elen < 4) {
1233                                 elem_parse_failed = true;
1234                                 break;
1235                         }
1236
1237                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1238                             pos[2] != 0x96 || pos[3] != 0x00)
1239                                 break;
1240
1241                         if (elen != 6) {
1242                                 elem_parse_failed = true;
1243                                 break;
1244                         }
1245
1246                         if (calc_crc)
1247                                 crc = crc32_be(crc, pos - 2, elen + 2);
1248
1249                         elems->cisco_dtpc_elem = pos;
1250                         break;
1251                 case WLAN_EID_ADDBA_EXT:
1252                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1253                                 elem_parse_failed = true;
1254                                 break;
1255                         }
1256                         elems->addba_ext_ie = (void *)pos;
1257                         break;
1258                 case WLAN_EID_TIMEOUT_INTERVAL:
1259                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1260                                 elems->timeout_int = (void *)pos;
1261                         else
1262                                 elem_parse_failed = true;
1263                         break;
1264                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1265                         if (elen >= sizeof(*elems->max_idle_period_ie))
1266                                 elems->max_idle_period_ie = (void *)pos;
1267                         break;
1268                 case WLAN_EID_RSNX:
1269                         elems->rsnx = pos;
1270                         elems->rsnx_len = elen;
1271                         break;
1272                 case WLAN_EID_EXTENSION:
1273                         ieee80211_parse_extension_element(calc_crc ?
1274                                                                 &crc : NULL,
1275                                                           elem, elems);
1276                         break;
1277                 default:
1278                         break;
1279                 }
1280
1281                 if (elem_parse_failed)
1282                         elems->parse_error = true;
1283                 else
1284                         __set_bit(id, seen_elems);
1285         }
1286
1287         if (!for_each_element_completed(elem, start, len))
1288                 elems->parse_error = true;
1289
1290         return crc;
1291 }
1292
1293 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1294                                             struct ieee802_11_elems *elems,
1295                                             u8 *transmitter_bssid,
1296                                             u8 *bss_bssid,
1297                                             u8 *nontransmitted_profile)
1298 {
1299         const struct element *elem, *sub;
1300         size_t profile_len = 0;
1301         bool found = false;
1302
1303         if (!bss_bssid || !transmitter_bssid)
1304                 return profile_len;
1305
1306         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1307                 if (elem->datalen < 2)
1308                         continue;
1309
1310                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1311                         u8 new_bssid[ETH_ALEN];
1312                         const u8 *index;
1313
1314                         if (sub->id != 0 || sub->datalen < 4) {
1315                                 /* not a valid BSS profile */
1316                                 continue;
1317                         }
1318
1319                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1320                             sub->data[1] != 2) {
1321                                 /* The first element of the
1322                                  * Nontransmitted BSSID Profile is not
1323                                  * the Nontransmitted BSSID Capability
1324                                  * element.
1325                                  */
1326                                 continue;
1327                         }
1328
1329                         memset(nontransmitted_profile, 0, len);
1330                         profile_len = cfg80211_merge_profile(start, len,
1331                                                              elem,
1332                                                              sub,
1333                                                              nontransmitted_profile,
1334                                                              len);
1335
1336                         /* found a Nontransmitted BSSID Profile */
1337                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1338                                                  nontransmitted_profile,
1339                                                  profile_len);
1340                         if (!index || index[1] < 1 || index[2] == 0) {
1341                                 /* Invalid MBSSID Index element */
1342                                 continue;
1343                         }
1344
1345                         cfg80211_gen_new_bssid(transmitter_bssid,
1346                                                elem->data[0],
1347                                                index[2],
1348                                                new_bssid);
1349                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1350                                 found = true;
1351                                 elems->bssid_index_len = index[1];
1352                                 elems->bssid_index = (void *)&index[2];
1353                                 break;
1354                         }
1355                 }
1356         }
1357
1358         return found ? profile_len : 0;
1359 }
1360
1361 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1362                                struct ieee802_11_elems *elems,
1363                                u64 filter, u32 crc, u8 *transmitter_bssid,
1364                                u8 *bss_bssid)
1365 {
1366         const struct element *non_inherit = NULL;
1367         u8 *nontransmitted_profile;
1368         int nontransmitted_profile_len = 0;
1369
1370         memset(elems, 0, sizeof(*elems));
1371         elems->ie_start = start;
1372         elems->total_len = len;
1373
1374         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1375         if (nontransmitted_profile) {
1376                 nontransmitted_profile_len =
1377                         ieee802_11_find_bssid_profile(start, len, elems,
1378                                                       transmitter_bssid,
1379                                                       bss_bssid,
1380                                                       nontransmitted_profile);
1381                 non_inherit =
1382                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1383                                                nontransmitted_profile,
1384                                                nontransmitted_profile_len);
1385         }
1386
1387         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1388                                           crc, non_inherit);
1389
1390         /* Override with nontransmitted profile, if found */
1391         if (nontransmitted_profile_len)
1392                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1393                                             nontransmitted_profile_len,
1394                                             action, elems, 0, 0, NULL);
1395
1396         if (elems->tim && !elems->parse_error) {
1397                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1398
1399                 elems->dtim_period = tim_ie->dtim_period;
1400                 elems->dtim_count = tim_ie->dtim_count;
1401         }
1402
1403         /* Override DTIM period and count if needed */
1404         if (elems->bssid_index &&
1405             elems->bssid_index_len >=
1406             offsetofend(struct ieee80211_bssid_index, dtim_period))
1407                 elems->dtim_period = elems->bssid_index->dtim_period;
1408
1409         if (elems->bssid_index &&
1410             elems->bssid_index_len >=
1411             offsetofend(struct ieee80211_bssid_index, dtim_count))
1412                 elems->dtim_count = elems->bssid_index->dtim_count;
1413
1414         kfree(nontransmitted_profile);
1415
1416         return crc;
1417 }
1418
1419 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1420                                            struct ieee80211_tx_queue_params
1421                                            *qparam, int ac)
1422 {
1423         struct ieee80211_chanctx_conf *chanctx_conf;
1424         const struct ieee80211_reg_rule *rrule;
1425         const struct ieee80211_wmm_ac *wmm_ac;
1426         u16 center_freq = 0;
1427
1428         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1429             sdata->vif.type != NL80211_IFTYPE_STATION)
1430                 return;
1431
1432         rcu_read_lock();
1433         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1434         if (chanctx_conf)
1435                 center_freq = chanctx_conf->def.chan->center_freq;
1436
1437         if (!center_freq) {
1438                 rcu_read_unlock();
1439                 return;
1440         }
1441
1442         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1443
1444         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1445                 rcu_read_unlock();
1446                 return;
1447         }
1448
1449         if (sdata->vif.type == NL80211_IFTYPE_AP)
1450                 wmm_ac = &rrule->wmm_rule.ap[ac];
1451         else
1452                 wmm_ac = &rrule->wmm_rule.client[ac];
1453         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1454         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1455         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1456         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1457         rcu_read_unlock();
1458 }
1459
1460 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1461                                bool bss_notify, bool enable_qos)
1462 {
1463         struct ieee80211_local *local = sdata->local;
1464         struct ieee80211_tx_queue_params qparam;
1465         struct ieee80211_chanctx_conf *chanctx_conf;
1466         int ac;
1467         bool use_11b;
1468         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1469         int aCWmin, aCWmax;
1470
1471         if (!local->ops->conf_tx)
1472                 return;
1473
1474         if (local->hw.queues < IEEE80211_NUM_ACS)
1475                 return;
1476
1477         memset(&qparam, 0, sizeof(qparam));
1478
1479         rcu_read_lock();
1480         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1481         use_11b = (chanctx_conf &&
1482                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1483                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1484         rcu_read_unlock();
1485
1486         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1487
1488         /* Set defaults according to 802.11-2007 Table 7-37 */
1489         aCWmax = 1023;
1490         if (use_11b)
1491                 aCWmin = 31;
1492         else
1493                 aCWmin = 15;
1494
1495         /* Confiure old 802.11b/g medium access rules. */
1496         qparam.cw_max = aCWmax;
1497         qparam.cw_min = aCWmin;
1498         qparam.txop = 0;
1499         qparam.aifs = 2;
1500
1501         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1502                 /* Update if QoS is enabled. */
1503                 if (enable_qos) {
1504                         switch (ac) {
1505                         case IEEE80211_AC_BK:
1506                                 qparam.cw_max = aCWmax;
1507                                 qparam.cw_min = aCWmin;
1508                                 qparam.txop = 0;
1509                                 if (is_ocb)
1510                                         qparam.aifs = 9;
1511                                 else
1512                                         qparam.aifs = 7;
1513                                 break;
1514                         /* never happens but let's not leave undefined */
1515                         default:
1516                         case IEEE80211_AC_BE:
1517                                 qparam.cw_max = aCWmax;
1518                                 qparam.cw_min = aCWmin;
1519                                 qparam.txop = 0;
1520                                 if (is_ocb)
1521                                         qparam.aifs = 6;
1522                                 else
1523                                         qparam.aifs = 3;
1524                                 break;
1525                         case IEEE80211_AC_VI:
1526                                 qparam.cw_max = aCWmin;
1527                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1528                                 if (is_ocb)
1529                                         qparam.txop = 0;
1530                                 else if (use_11b)
1531                                         qparam.txop = 6016/32;
1532                                 else
1533                                         qparam.txop = 3008/32;
1534
1535                                 if (is_ocb)
1536                                         qparam.aifs = 3;
1537                                 else
1538                                         qparam.aifs = 2;
1539                                 break;
1540                         case IEEE80211_AC_VO:
1541                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1542                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1543                                 if (is_ocb)
1544                                         qparam.txop = 0;
1545                                 else if (use_11b)
1546                                         qparam.txop = 3264/32;
1547                                 else
1548                                         qparam.txop = 1504/32;
1549                                 qparam.aifs = 2;
1550                                 break;
1551                         }
1552                 }
1553                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1554
1555                 qparam.uapsd = false;
1556
1557                 sdata->tx_conf[ac] = qparam;
1558                 drv_conf_tx(local, sdata, ac, &qparam);
1559         }
1560
1561         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1562             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1563             sdata->vif.type != NL80211_IFTYPE_NAN) {
1564                 sdata->vif.bss_conf.qos = enable_qos;
1565                 if (bss_notify)
1566                         ieee80211_bss_info_change_notify(sdata,
1567                                                          BSS_CHANGED_QOS);
1568         }
1569 }
1570
1571 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1572                          u16 transaction, u16 auth_alg, u16 status,
1573                          const u8 *extra, size_t extra_len, const u8 *da,
1574                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1575                          u32 tx_flags)
1576 {
1577         struct ieee80211_local *local = sdata->local;
1578         struct sk_buff *skb;
1579         struct ieee80211_mgmt *mgmt;
1580         int err;
1581
1582         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1583         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1584                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1585         if (!skb)
1586                 return;
1587
1588         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1589
1590         mgmt = skb_put_zero(skb, 24 + 6);
1591         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1592                                           IEEE80211_STYPE_AUTH);
1593         memcpy(mgmt->da, da, ETH_ALEN);
1594         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1595         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1596         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1597         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1598         mgmt->u.auth.status_code = cpu_to_le16(status);
1599         if (extra)
1600                 skb_put_data(skb, extra, extra_len);
1601
1602         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1603                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1604                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1605                 WARN_ON(err);
1606         }
1607
1608         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1609                                         tx_flags;
1610         ieee80211_tx_skb(sdata, skb);
1611 }
1612
1613 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1614                                     const u8 *da, const u8 *bssid,
1615                                     u16 stype, u16 reason,
1616                                     bool send_frame, u8 *frame_buf)
1617 {
1618         struct ieee80211_local *local = sdata->local;
1619         struct sk_buff *skb;
1620         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1621
1622         /* build frame */
1623         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1624         mgmt->duration = 0; /* initialize only */
1625         mgmt->seq_ctrl = 0; /* initialize only */
1626         memcpy(mgmt->da, da, ETH_ALEN);
1627         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1628         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1629         /* u.deauth.reason_code == u.disassoc.reason_code */
1630         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1631
1632         if (send_frame) {
1633                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1634                                     IEEE80211_DEAUTH_FRAME_LEN);
1635                 if (!skb)
1636                         return;
1637
1638                 skb_reserve(skb, local->hw.extra_tx_headroom);
1639
1640                 /* copy in frame */
1641                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1642
1643                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1644                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1645                         IEEE80211_SKB_CB(skb)->flags |=
1646                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1647
1648                 ieee80211_tx_skb(sdata, skb);
1649         }
1650 }
1651
1652 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1653                                          u8 *buffer, size_t buffer_len,
1654                                          const u8 *ie, size_t ie_len,
1655                                          enum nl80211_band band,
1656                                          u32 rate_mask,
1657                                          struct cfg80211_chan_def *chandef,
1658                                          size_t *offset, u32 flags)
1659 {
1660         struct ieee80211_supported_band *sband;
1661         const struct ieee80211_sta_he_cap *he_cap;
1662         u8 *pos = buffer, *end = buffer + buffer_len;
1663         size_t noffset;
1664         int supp_rates_len, i;
1665         u8 rates[32];
1666         int num_rates;
1667         int ext_rates_len;
1668         int shift;
1669         u32 rate_flags;
1670         bool have_80mhz = false;
1671
1672         *offset = 0;
1673
1674         sband = local->hw.wiphy->bands[band];
1675         if (WARN_ON_ONCE(!sband))
1676                 return 0;
1677
1678         rate_flags = ieee80211_chandef_rate_flags(chandef);
1679         shift = ieee80211_chandef_get_shift(chandef);
1680
1681         num_rates = 0;
1682         for (i = 0; i < sband->n_bitrates; i++) {
1683                 if ((BIT(i) & rate_mask) == 0)
1684                         continue; /* skip rate */
1685                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1686                         continue;
1687
1688                 rates[num_rates++] =
1689                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1690                                           (1 << shift) * 5);
1691         }
1692
1693         supp_rates_len = min_t(int, num_rates, 8);
1694
1695         if (end - pos < 2 + supp_rates_len)
1696                 goto out_err;
1697         *pos++ = WLAN_EID_SUPP_RATES;
1698         *pos++ = supp_rates_len;
1699         memcpy(pos, rates, supp_rates_len);
1700         pos += supp_rates_len;
1701
1702         /* insert "request information" if in custom IEs */
1703         if (ie && ie_len) {
1704                 static const u8 before_extrates[] = {
1705                         WLAN_EID_SSID,
1706                         WLAN_EID_SUPP_RATES,
1707                         WLAN_EID_REQUEST,
1708                 };
1709                 noffset = ieee80211_ie_split(ie, ie_len,
1710                                              before_extrates,
1711                                              ARRAY_SIZE(before_extrates),
1712                                              *offset);
1713                 if (end - pos < noffset - *offset)
1714                         goto out_err;
1715                 memcpy(pos, ie + *offset, noffset - *offset);
1716                 pos += noffset - *offset;
1717                 *offset = noffset;
1718         }
1719
1720         ext_rates_len = num_rates - supp_rates_len;
1721         if (ext_rates_len > 0) {
1722                 if (end - pos < 2 + ext_rates_len)
1723                         goto out_err;
1724                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1725                 *pos++ = ext_rates_len;
1726                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1727                 pos += ext_rates_len;
1728         }
1729
1730         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1731                 if (end - pos < 3)
1732                         goto out_err;
1733                 *pos++ = WLAN_EID_DS_PARAMS;
1734                 *pos++ = 1;
1735                 *pos++ = ieee80211_frequency_to_channel(
1736                                 chandef->chan->center_freq);
1737         }
1738
1739         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1740                 goto done;
1741
1742         /* insert custom IEs that go before HT */
1743         if (ie && ie_len) {
1744                 static const u8 before_ht[] = {
1745                         /*
1746                          * no need to list the ones split off already
1747                          * (or generated here)
1748                          */
1749                         WLAN_EID_DS_PARAMS,
1750                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1751                 };
1752                 noffset = ieee80211_ie_split(ie, ie_len,
1753                                              before_ht, ARRAY_SIZE(before_ht),
1754                                              *offset);
1755                 if (end - pos < noffset - *offset)
1756                         goto out_err;
1757                 memcpy(pos, ie + *offset, noffset - *offset);
1758                 pos += noffset - *offset;
1759                 *offset = noffset;
1760         }
1761
1762         if (sband->ht_cap.ht_supported) {
1763                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1764                         goto out_err;
1765                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1766                                                 sband->ht_cap.cap);
1767         }
1768
1769         /* insert custom IEs that go before VHT */
1770         if (ie && ie_len) {
1771                 static const u8 before_vht[] = {
1772                         /*
1773                          * no need to list the ones split off already
1774                          * (or generated here)
1775                          */
1776                         WLAN_EID_BSS_COEX_2040,
1777                         WLAN_EID_EXT_CAPABILITY,
1778                         WLAN_EID_SSID_LIST,
1779                         WLAN_EID_CHANNEL_USAGE,
1780                         WLAN_EID_INTERWORKING,
1781                         WLAN_EID_MESH_ID,
1782                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1783                 };
1784                 noffset = ieee80211_ie_split(ie, ie_len,
1785                                              before_vht, ARRAY_SIZE(before_vht),
1786                                              *offset);
1787                 if (end - pos < noffset - *offset)
1788                         goto out_err;
1789                 memcpy(pos, ie + *offset, noffset - *offset);
1790                 pos += noffset - *offset;
1791                 *offset = noffset;
1792         }
1793
1794         /* Check if any channel in this sband supports at least 80 MHz */
1795         for (i = 0; i < sband->n_channels; i++) {
1796                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1797                                                 IEEE80211_CHAN_NO_80MHZ))
1798                         continue;
1799
1800                 have_80mhz = true;
1801                 break;
1802         }
1803
1804         if (sband->vht_cap.vht_supported && have_80mhz) {
1805                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1806                         goto out_err;
1807                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1808                                                  sband->vht_cap.cap);
1809         }
1810
1811         /* insert custom IEs that go before HE */
1812         if (ie && ie_len) {
1813                 static const u8 before_he[] = {
1814                         /*
1815                          * no need to list the ones split off before VHT
1816                          * or generated here
1817                          */
1818                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1819                         WLAN_EID_AP_CSN,
1820                         /* TODO: add 11ah/11aj/11ak elements */
1821                 };
1822                 noffset = ieee80211_ie_split(ie, ie_len,
1823                                              before_he, ARRAY_SIZE(before_he),
1824                                              *offset);
1825                 if (end - pos < noffset - *offset)
1826                         goto out_err;
1827                 memcpy(pos, ie + *offset, noffset - *offset);
1828                 pos += noffset - *offset;
1829                 *offset = noffset;
1830         }
1831
1832         he_cap = ieee80211_get_he_sta_cap(sband);
1833         if (he_cap) {
1834                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1835                 if (!pos)
1836                         goto out_err;
1837         }
1838
1839         /*
1840          * If adding more here, adjust code in main.c
1841          * that calculates local->scan_ies_len.
1842          */
1843
1844         return pos - buffer;
1845  out_err:
1846         WARN_ONCE(1, "not enough space for preq IEs\n");
1847  done:
1848         return pos - buffer;
1849 }
1850
1851 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1852                              size_t buffer_len,
1853                              struct ieee80211_scan_ies *ie_desc,
1854                              const u8 *ie, size_t ie_len,
1855                              u8 bands_used, u32 *rate_masks,
1856                              struct cfg80211_chan_def *chandef,
1857                              u32 flags)
1858 {
1859         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1860         int i;
1861
1862         memset(ie_desc, 0, sizeof(*ie_desc));
1863
1864         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1865                 if (bands_used & BIT(i)) {
1866                         pos += ieee80211_build_preq_ies_band(local,
1867                                                              buffer + pos,
1868                                                              buffer_len - pos,
1869                                                              ie, ie_len, i,
1870                                                              rate_masks[i],
1871                                                              chandef,
1872                                                              &custom_ie_offset,
1873                                                              flags);
1874                         ie_desc->ies[i] = buffer + old_pos;
1875                         ie_desc->len[i] = pos - old_pos;
1876                         old_pos = pos;
1877                 }
1878         }
1879
1880         /* add any remaining custom IEs */
1881         if (ie && ie_len) {
1882                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1883                               "not enough space for preq custom IEs\n"))
1884                         return pos;
1885                 memcpy(buffer + pos, ie + custom_ie_offset,
1886                        ie_len - custom_ie_offset);
1887                 ie_desc->common_ies = buffer + pos;
1888                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1889                 pos += ie_len - custom_ie_offset;
1890         }
1891
1892         return pos;
1893 };
1894
1895 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1896                                           const u8 *src, const u8 *dst,
1897                                           u32 ratemask,
1898                                           struct ieee80211_channel *chan,
1899                                           const u8 *ssid, size_t ssid_len,
1900                                           const u8 *ie, size_t ie_len,
1901                                           u32 flags)
1902 {
1903         struct ieee80211_local *local = sdata->local;
1904         struct cfg80211_chan_def chandef;
1905         struct sk_buff *skb;
1906         struct ieee80211_mgmt *mgmt;
1907         int ies_len;
1908         u32 rate_masks[NUM_NL80211_BANDS] = {};
1909         struct ieee80211_scan_ies dummy_ie_desc;
1910
1911         /*
1912          * Do not send DS Channel parameter for directed probe requests
1913          * in order to maximize the chance that we get a response.  Some
1914          * badly-behaved APs don't respond when this parameter is included.
1915          */
1916         chandef.width = sdata->vif.bss_conf.chandef.width;
1917         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1918                 chandef.chan = NULL;
1919         else
1920                 chandef.chan = chan;
1921
1922         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1923                                      100 + ie_len);
1924         if (!skb)
1925                 return NULL;
1926
1927         rate_masks[chan->band] = ratemask;
1928         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1929                                            skb_tailroom(skb), &dummy_ie_desc,
1930                                            ie, ie_len, BIT(chan->band),
1931                                            rate_masks, &chandef, flags);
1932         skb_put(skb, ies_len);
1933
1934         if (dst) {
1935                 mgmt = (struct ieee80211_mgmt *) skb->data;
1936                 memcpy(mgmt->da, dst, ETH_ALEN);
1937                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1938         }
1939
1940         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1941
1942         return skb;
1943 }
1944
1945 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1946                             struct ieee802_11_elems *elems,
1947                             enum nl80211_band band, u32 *basic_rates)
1948 {
1949         struct ieee80211_supported_band *sband;
1950         size_t num_rates;
1951         u32 supp_rates, rate_flags;
1952         int i, j, shift;
1953
1954         sband = sdata->local->hw.wiphy->bands[band];
1955         if (WARN_ON(!sband))
1956                 return 1;
1957
1958         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1959         shift = ieee80211_vif_get_shift(&sdata->vif);
1960
1961         num_rates = sband->n_bitrates;
1962         supp_rates = 0;
1963         for (i = 0; i < elems->supp_rates_len +
1964                      elems->ext_supp_rates_len; i++) {
1965                 u8 rate = 0;
1966                 int own_rate;
1967                 bool is_basic;
1968                 if (i < elems->supp_rates_len)
1969                         rate = elems->supp_rates[i];
1970                 else if (elems->ext_supp_rates)
1971                         rate = elems->ext_supp_rates
1972                                 [i - elems->supp_rates_len];
1973                 own_rate = 5 * (rate & 0x7f);
1974                 is_basic = !!(rate & 0x80);
1975
1976                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1977                         continue;
1978
1979                 for (j = 0; j < num_rates; j++) {
1980                         int brate;
1981                         if ((rate_flags & sband->bitrates[j].flags)
1982                             != rate_flags)
1983                                 continue;
1984
1985                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1986                                              1 << shift);
1987
1988                         if (brate == own_rate) {
1989                                 supp_rates |= BIT(j);
1990                                 if (basic_rates && is_basic)
1991                                         *basic_rates |= BIT(j);
1992                         }
1993                 }
1994         }
1995         return supp_rates;
1996 }
1997
1998 void ieee80211_stop_device(struct ieee80211_local *local)
1999 {
2000         ieee80211_led_radio(local, false);
2001         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2002
2003         cancel_work_sync(&local->reconfig_filter);
2004
2005         flush_workqueue(local->workqueue);
2006         drv_stop(local);
2007 }
2008
2009 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2010                                            bool aborted)
2011 {
2012         /* It's possible that we don't handle the scan completion in
2013          * time during suspend, so if it's still marked as completed
2014          * here, queue the work and flush it to clean things up.
2015          * Instead of calling the worker function directly here, we
2016          * really queue it to avoid potential races with other flows
2017          * scheduling the same work.
2018          */
2019         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2020                 /* If coming from reconfiguration failure, abort the scan so
2021                  * we don't attempt to continue a partial HW scan - which is
2022                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2023                  * completed scan, and a 5 GHz portion is still pending.
2024                  */
2025                 if (aborted)
2026                         set_bit(SCAN_ABORTED, &local->scanning);
2027                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2028                 flush_delayed_work(&local->scan_work);
2029         }
2030 }
2031
2032 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2033 {
2034         struct ieee80211_sub_if_data *sdata;
2035         struct ieee80211_chanctx *ctx;
2036
2037         /*
2038          * We get here if during resume the device can't be restarted properly.
2039          * We might also get here if this happens during HW reset, which is a
2040          * slightly different situation and we need to drop all connections in
2041          * the latter case.
2042          *
2043          * Ask cfg80211 to turn off all interfaces, this will result in more
2044          * warnings but at least we'll then get into a clean stopped state.
2045          */
2046
2047         local->resuming = false;
2048         local->suspended = false;
2049         local->in_reconfig = false;
2050
2051         ieee80211_flush_completed_scan(local, true);
2052
2053         /* scheduled scan clearly can't be running any more, but tell
2054          * cfg80211 and clear local state
2055          */
2056         ieee80211_sched_scan_end(local);
2057
2058         list_for_each_entry(sdata, &local->interfaces, list)
2059                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2060
2061         /* Mark channel contexts as not being in the driver any more to avoid
2062          * removing them from the driver during the shutdown process...
2063          */
2064         mutex_lock(&local->chanctx_mtx);
2065         list_for_each_entry(ctx, &local->chanctx_list, list)
2066                 ctx->driver_present = false;
2067         mutex_unlock(&local->chanctx_mtx);
2068
2069         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2070 }
2071
2072 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2073                                      struct ieee80211_sub_if_data *sdata)
2074 {
2075         struct ieee80211_chanctx_conf *conf;
2076         struct ieee80211_chanctx *ctx;
2077
2078         if (!local->use_chanctx)
2079                 return;
2080
2081         mutex_lock(&local->chanctx_mtx);
2082         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2083                                          lockdep_is_held(&local->chanctx_mtx));
2084         if (conf) {
2085                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2086                 drv_assign_vif_chanctx(local, sdata, ctx);
2087         }
2088         mutex_unlock(&local->chanctx_mtx);
2089 }
2090
2091 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2092 {
2093         struct ieee80211_local *local = sdata->local;
2094         struct sta_info *sta;
2095
2096         /* add STAs back */
2097         mutex_lock(&local->sta_mtx);
2098         list_for_each_entry(sta, &local->sta_list, list) {
2099                 enum ieee80211_sta_state state;
2100
2101                 if (!sta->uploaded || sta->sdata != sdata)
2102                         continue;
2103
2104                 for (state = IEEE80211_STA_NOTEXIST;
2105                      state < sta->sta_state; state++)
2106                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2107                                               state + 1));
2108         }
2109         mutex_unlock(&local->sta_mtx);
2110 }
2111
2112 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2113 {
2114         struct cfg80211_nan_func *func, **funcs;
2115         int res, id, i = 0;
2116
2117         res = drv_start_nan(sdata->local, sdata,
2118                             &sdata->u.nan.conf);
2119         if (WARN_ON(res))
2120                 return res;
2121
2122         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2123                         sizeof(*funcs),
2124                         GFP_KERNEL);
2125         if (!funcs)
2126                 return -ENOMEM;
2127
2128         /* Add all the functions:
2129          * This is a little bit ugly. We need to call a potentially sleeping
2130          * callback for each NAN function, so we can't hold the spinlock.
2131          */
2132         spin_lock_bh(&sdata->u.nan.func_lock);
2133
2134         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2135                 funcs[i++] = func;
2136
2137         spin_unlock_bh(&sdata->u.nan.func_lock);
2138
2139         for (i = 0; funcs[i]; i++) {
2140                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2141                 if (WARN_ON(res))
2142                         ieee80211_nan_func_terminated(&sdata->vif,
2143                                                       funcs[i]->instance_id,
2144                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2145                                                       GFP_KERNEL);
2146         }
2147
2148         kfree(funcs);
2149
2150         return 0;
2151 }
2152
2153 int ieee80211_reconfig(struct ieee80211_local *local)
2154 {
2155         struct ieee80211_hw *hw = &local->hw;
2156         struct ieee80211_sub_if_data *sdata;
2157         struct ieee80211_chanctx *ctx;
2158         struct sta_info *sta;
2159         int res, i;
2160         bool reconfig_due_to_wowlan = false;
2161         struct ieee80211_sub_if_data *sched_scan_sdata;
2162         struct cfg80211_sched_scan_request *sched_scan_req;
2163         bool sched_scan_stopped = false;
2164         bool suspended = local->suspended;
2165
2166         /* nothing to do if HW shouldn't run */
2167         if (!local->open_count)
2168                 goto wake_up;
2169
2170 #ifdef CONFIG_PM
2171         if (suspended)
2172                 local->resuming = true;
2173
2174         if (local->wowlan) {
2175                 /*
2176                  * In the wowlan case, both mac80211 and the device
2177                  * are functional when the resume op is called, so
2178                  * clear local->suspended so the device could operate
2179                  * normally (e.g. pass rx frames).
2180                  */
2181                 local->suspended = false;
2182                 res = drv_resume(local);
2183                 local->wowlan = false;
2184                 if (res < 0) {
2185                         local->resuming = false;
2186                         return res;
2187                 }
2188                 if (res == 0)
2189                         goto wake_up;
2190                 WARN_ON(res > 1);
2191                 /*
2192                  * res is 1, which means the driver requested
2193                  * to go through a regular reset on wakeup.
2194                  * restore local->suspended in this case.
2195                  */
2196                 reconfig_due_to_wowlan = true;
2197                 local->suspended = true;
2198         }
2199 #endif
2200
2201         /*
2202          * In case of hw_restart during suspend (without wowlan),
2203          * cancel restart work, as we are reconfiguring the device
2204          * anyway.
2205          * Note that restart_work is scheduled on a frozen workqueue,
2206          * so we can't deadlock in this case.
2207          */
2208         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2209                 cancel_work_sync(&local->restart_work);
2210
2211         local->started = false;
2212
2213         /*
2214          * Upon resume hardware can sometimes be goofy due to
2215          * various platform / driver / bus issues, so restarting
2216          * the device may at times not work immediately. Propagate
2217          * the error.
2218          */
2219         res = drv_start(local);
2220         if (res) {
2221                 if (suspended)
2222                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2223                 else
2224                         WARN(1, "Hardware became unavailable during restart.\n");
2225                 ieee80211_handle_reconfig_failure(local);
2226                 return res;
2227         }
2228
2229         /* setup fragmentation threshold */
2230         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2231
2232         /* setup RTS threshold */
2233         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2234
2235         /* reset coverage class */
2236         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2237
2238         ieee80211_led_radio(local, true);
2239         ieee80211_mod_tpt_led_trig(local,
2240                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2241
2242         /* add interfaces */
2243         sdata = rtnl_dereference(local->monitor_sdata);
2244         if (sdata) {
2245                 /* in HW restart it exists already */
2246                 WARN_ON(local->resuming);
2247                 res = drv_add_interface(local, sdata);
2248                 if (WARN_ON(res)) {
2249                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2250                         synchronize_net();
2251                         kfree(sdata);
2252                 }
2253         }
2254
2255         list_for_each_entry(sdata, &local->interfaces, list) {
2256                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2257                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2258                     ieee80211_sdata_running(sdata)) {
2259                         res = drv_add_interface(local, sdata);
2260                         if (WARN_ON(res))
2261                                 break;
2262                 }
2263         }
2264
2265         /* If adding any of the interfaces failed above, roll back and
2266          * report failure.
2267          */
2268         if (res) {
2269                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2270                                                      list)
2271                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2272                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2273                             ieee80211_sdata_running(sdata))
2274                                 drv_remove_interface(local, sdata);
2275                 ieee80211_handle_reconfig_failure(local);
2276                 return res;
2277         }
2278
2279         /* add channel contexts */
2280         if (local->use_chanctx) {
2281                 mutex_lock(&local->chanctx_mtx);
2282                 list_for_each_entry(ctx, &local->chanctx_list, list)
2283                         if (ctx->replace_state !=
2284                             IEEE80211_CHANCTX_REPLACES_OTHER)
2285                                 WARN_ON(drv_add_chanctx(local, ctx));
2286                 mutex_unlock(&local->chanctx_mtx);
2287
2288                 sdata = rtnl_dereference(local->monitor_sdata);
2289                 if (sdata && ieee80211_sdata_running(sdata))
2290                         ieee80211_assign_chanctx(local, sdata);
2291         }
2292
2293         /* reconfigure hardware */
2294         ieee80211_hw_config(local, ~0);
2295
2296         ieee80211_configure_filter(local);
2297
2298         /* Finally also reconfigure all the BSS information */
2299         list_for_each_entry(sdata, &local->interfaces, list) {
2300                 u32 changed;
2301
2302                 if (!ieee80211_sdata_running(sdata))
2303                         continue;
2304
2305                 ieee80211_assign_chanctx(local, sdata);
2306
2307                 switch (sdata->vif.type) {
2308                 case NL80211_IFTYPE_AP_VLAN:
2309                 case NL80211_IFTYPE_MONITOR:
2310                         break;
2311                 case NL80211_IFTYPE_ADHOC:
2312                         if (sdata->vif.bss_conf.ibss_joined)
2313                                 WARN_ON(drv_join_ibss(local, sdata));
2314                         /* fall through */
2315                 default:
2316                         ieee80211_reconfig_stations(sdata);
2317                         /* fall through */
2318                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2319                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2320                                 drv_conf_tx(local, sdata, i,
2321                                             &sdata->tx_conf[i]);
2322                         break;
2323                 }
2324
2325                 /* common change flags for all interface types */
2326                 changed = BSS_CHANGED_ERP_CTS_PROT |
2327                           BSS_CHANGED_ERP_PREAMBLE |
2328                           BSS_CHANGED_ERP_SLOT |
2329                           BSS_CHANGED_HT |
2330                           BSS_CHANGED_BASIC_RATES |
2331                           BSS_CHANGED_BEACON_INT |
2332                           BSS_CHANGED_BSSID |
2333                           BSS_CHANGED_CQM |
2334                           BSS_CHANGED_QOS |
2335                           BSS_CHANGED_IDLE |
2336                           BSS_CHANGED_TXPOWER |
2337                           BSS_CHANGED_MCAST_RATE;
2338
2339                 if (sdata->vif.mu_mimo_owner)
2340                         changed |= BSS_CHANGED_MU_GROUPS;
2341
2342                 switch (sdata->vif.type) {
2343                 case NL80211_IFTYPE_STATION:
2344                         changed |= BSS_CHANGED_ASSOC |
2345                                    BSS_CHANGED_ARP_FILTER |
2346                                    BSS_CHANGED_PS;
2347
2348                         /* Re-send beacon info report to the driver */
2349                         if (sdata->u.mgd.have_beacon)
2350                                 changed |= BSS_CHANGED_BEACON_INFO;
2351
2352                         if (sdata->vif.bss_conf.max_idle_period ||
2353                             sdata->vif.bss_conf.protected_keep_alive)
2354                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2355
2356                         sdata_lock(sdata);
2357                         ieee80211_bss_info_change_notify(sdata, changed);
2358                         sdata_unlock(sdata);
2359                         break;
2360                 case NL80211_IFTYPE_OCB:
2361                         changed |= BSS_CHANGED_OCB;
2362                         ieee80211_bss_info_change_notify(sdata, changed);
2363                         break;
2364                 case NL80211_IFTYPE_ADHOC:
2365                         changed |= BSS_CHANGED_IBSS;
2366                         /* fall through */
2367                 case NL80211_IFTYPE_AP:
2368                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2369
2370                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2371                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2372                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2373                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2374
2375                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2376                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2377
2378                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2379                                         drv_start_ap(local, sdata);
2380                         }
2381
2382                         /* fall through */
2383                 case NL80211_IFTYPE_MESH_POINT:
2384                         if (sdata->vif.bss_conf.enable_beacon) {
2385                                 changed |= BSS_CHANGED_BEACON |
2386                                            BSS_CHANGED_BEACON_ENABLED;
2387                                 ieee80211_bss_info_change_notify(sdata, changed);
2388                         }
2389                         break;
2390                 case NL80211_IFTYPE_NAN:
2391                         res = ieee80211_reconfig_nan(sdata);
2392                         if (res < 0) {
2393                                 ieee80211_handle_reconfig_failure(local);
2394                                 return res;
2395                         }
2396                         break;
2397                 case NL80211_IFTYPE_WDS:
2398                 case NL80211_IFTYPE_AP_VLAN:
2399                 case NL80211_IFTYPE_MONITOR:
2400                 case NL80211_IFTYPE_P2P_DEVICE:
2401                         /* nothing to do */
2402                         break;
2403                 case NL80211_IFTYPE_UNSPECIFIED:
2404                 case NUM_NL80211_IFTYPES:
2405                 case NL80211_IFTYPE_P2P_CLIENT:
2406                 case NL80211_IFTYPE_P2P_GO:
2407                         WARN_ON(1);
2408                         break;
2409                 }
2410         }
2411
2412         ieee80211_recalc_ps(local);
2413
2414         /*
2415          * The sta might be in psm against the ap (e.g. because
2416          * this was the state before a hw restart), so we
2417          * explicitly send a null packet in order to make sure
2418          * it'll sync against the ap (and get out of psm).
2419          */
2420         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2421                 list_for_each_entry(sdata, &local->interfaces, list) {
2422                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2423                                 continue;
2424                         if (!sdata->u.mgd.associated)
2425                                 continue;
2426
2427                         ieee80211_send_nullfunc(local, sdata, false);
2428                 }
2429         }
2430
2431         /* APs are now beaconing, add back stations */
2432         mutex_lock(&local->sta_mtx);
2433         list_for_each_entry(sta, &local->sta_list, list) {
2434                 enum ieee80211_sta_state state;
2435
2436                 if (!sta->uploaded)
2437                         continue;
2438
2439                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2440                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2441                         continue;
2442
2443                 for (state = IEEE80211_STA_NOTEXIST;
2444                      state < sta->sta_state; state++)
2445                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2446                                               state + 1));
2447         }
2448         mutex_unlock(&local->sta_mtx);
2449
2450         /* add back keys */
2451         list_for_each_entry(sdata, &local->interfaces, list)
2452                 ieee80211_reenable_keys(sdata);
2453
2454         /* Reconfigure sched scan if it was interrupted by FW restart */
2455         mutex_lock(&local->mtx);
2456         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2457                                                 lockdep_is_held(&local->mtx));
2458         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2459                                                 lockdep_is_held(&local->mtx));
2460         if (sched_scan_sdata && sched_scan_req)
2461                 /*
2462                  * Sched scan stopped, but we don't want to report it. Instead,
2463                  * we're trying to reschedule. However, if more than one scan
2464                  * plan was set, we cannot reschedule since we don't know which
2465                  * scan plan was currently running (and some scan plans may have
2466                  * already finished).
2467                  */
2468                 if (sched_scan_req->n_scan_plans > 1 ||
2469                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2470                                                          sched_scan_req)) {
2471                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2472                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2473                         sched_scan_stopped = true;
2474                 }
2475         mutex_unlock(&local->mtx);
2476
2477         if (sched_scan_stopped)
2478                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2479
2480  wake_up:
2481
2482         if (local->monitors == local->open_count && local->monitors > 0)
2483                 ieee80211_add_virtual_monitor(local);
2484
2485         /*
2486          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2487          * sessions can be established after a resume.
2488          *
2489          * Also tear down aggregation sessions since reconfiguring
2490          * them in a hardware restart scenario is not easily done
2491          * right now, and the hardware will have lost information
2492          * about the sessions, but we and the AP still think they
2493          * are active. This is really a workaround though.
2494          */
2495         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2496                 mutex_lock(&local->sta_mtx);
2497
2498                 list_for_each_entry(sta, &local->sta_list, list) {
2499                         if (!local->resuming)
2500                                 ieee80211_sta_tear_down_BA_sessions(
2501                                                 sta, AGG_STOP_LOCAL_REQUEST);
2502                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2503                 }
2504
2505                 mutex_unlock(&local->sta_mtx);
2506         }
2507
2508         if (local->in_reconfig) {
2509                 local->in_reconfig = false;
2510                 barrier();
2511
2512                 /* Restart deferred ROCs */
2513                 mutex_lock(&local->mtx);
2514                 ieee80211_start_next_roc(local);
2515                 mutex_unlock(&local->mtx);
2516
2517                 /* Requeue all works */
2518                 list_for_each_entry(sdata, &local->interfaces, list)
2519                         ieee80211_queue_work(&local->hw, &sdata->work);
2520         }
2521
2522         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2523                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2524                                         false);
2525
2526         /*
2527          * If this is for hw restart things are still running.
2528          * We may want to change that later, however.
2529          */
2530         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2531                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2532
2533         if (!suspended)
2534                 return 0;
2535
2536 #ifdef CONFIG_PM
2537         /* first set suspended false, then resuming */
2538         local->suspended = false;
2539         mb();
2540         local->resuming = false;
2541
2542         ieee80211_flush_completed_scan(local, false);
2543
2544         if (local->open_count && !reconfig_due_to_wowlan)
2545                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2546
2547         list_for_each_entry(sdata, &local->interfaces, list) {
2548                 if (!ieee80211_sdata_running(sdata))
2549                         continue;
2550                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2551                         ieee80211_sta_restart(sdata);
2552         }
2553
2554         mod_timer(&local->sta_cleanup, jiffies + 1);
2555 #else
2556         WARN_ON(1);
2557 #endif
2558
2559         return 0;
2560 }
2561
2562 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2563 {
2564         struct ieee80211_sub_if_data *sdata;
2565         struct ieee80211_local *local;
2566         struct ieee80211_key *key;
2567
2568         if (WARN_ON(!vif))
2569                 return;
2570
2571         sdata = vif_to_sdata(vif);
2572         local = sdata->local;
2573
2574         if (WARN_ON(!local->resuming))
2575                 return;
2576
2577         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2578                 return;
2579
2580         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2581
2582         mutex_lock(&local->key_mtx);
2583         list_for_each_entry(key, &sdata->key_list, list)
2584                 key->flags |= KEY_FLAG_TAINTED;
2585         mutex_unlock(&local->key_mtx);
2586 }
2587 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2588
2589 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2590 {
2591         struct ieee80211_local *local = sdata->local;
2592         struct ieee80211_chanctx_conf *chanctx_conf;
2593         struct ieee80211_chanctx *chanctx;
2594
2595         mutex_lock(&local->chanctx_mtx);
2596
2597         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2598                                         lockdep_is_held(&local->chanctx_mtx));
2599
2600         /*
2601          * This function can be called from a work, thus it may be possible
2602          * that the chanctx_conf is removed (due to a disconnection, for
2603          * example).
2604          * So nothing should be done in such case.
2605          */
2606         if (!chanctx_conf)
2607                 goto unlock;
2608
2609         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2610         ieee80211_recalc_smps_chanctx(local, chanctx);
2611  unlock:
2612         mutex_unlock(&local->chanctx_mtx);
2613 }
2614
2615 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2616 {
2617         struct ieee80211_local *local = sdata->local;
2618         struct ieee80211_chanctx_conf *chanctx_conf;
2619         struct ieee80211_chanctx *chanctx;
2620
2621         mutex_lock(&local->chanctx_mtx);
2622
2623         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2624                                         lockdep_is_held(&local->chanctx_mtx));
2625
2626         if (WARN_ON_ONCE(!chanctx_conf))
2627                 goto unlock;
2628
2629         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2630         ieee80211_recalc_chanctx_min_def(local, chanctx);
2631  unlock:
2632         mutex_unlock(&local->chanctx_mtx);
2633 }
2634
2635 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2636 {
2637         size_t pos = offset;
2638
2639         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2640                 pos += 2 + ies[pos + 1];
2641
2642         return pos;
2643 }
2644
2645 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2646                                             int rssi_min_thold,
2647                                             int rssi_max_thold)
2648 {
2649         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2650
2651         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2652                 return;
2653
2654         /*
2655          * Scale up threshold values before storing it, as the RSSI averaging
2656          * algorithm uses a scaled up value as well. Change this scaling
2657          * factor if the RSSI averaging algorithm changes.
2658          */
2659         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2660         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2661 }
2662
2663 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2664                                     int rssi_min_thold,
2665                                     int rssi_max_thold)
2666 {
2667         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2668
2669         WARN_ON(rssi_min_thold == rssi_max_thold ||
2670                 rssi_min_thold > rssi_max_thold);
2671
2672         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2673                                        rssi_max_thold);
2674 }
2675 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2676
2677 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2678 {
2679         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2680
2681         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2682 }
2683 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2684
2685 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2686                               u16 cap)
2687 {
2688         __le16 tmp;
2689
2690         *pos++ = WLAN_EID_HT_CAPABILITY;
2691         *pos++ = sizeof(struct ieee80211_ht_cap);
2692         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2693
2694         /* capability flags */
2695         tmp = cpu_to_le16(cap);
2696         memcpy(pos, &tmp, sizeof(u16));
2697         pos += sizeof(u16);
2698
2699         /* AMPDU parameters */
2700         *pos++ = ht_cap->ampdu_factor |
2701                  (ht_cap->ampdu_density <<
2702                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2703
2704         /* MCS set */
2705         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2706         pos += sizeof(ht_cap->mcs);
2707
2708         /* extended capabilities */
2709         pos += sizeof(__le16);
2710
2711         /* BF capabilities */
2712         pos += sizeof(__le32);
2713
2714         /* antenna selection */
2715         pos += sizeof(u8);
2716
2717         return pos;
2718 }
2719
2720 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2721                                u32 cap)
2722 {
2723         __le32 tmp;
2724
2725         *pos++ = WLAN_EID_VHT_CAPABILITY;
2726         *pos++ = sizeof(struct ieee80211_vht_cap);
2727         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2728
2729         /* capability flags */
2730         tmp = cpu_to_le32(cap);
2731         memcpy(pos, &tmp, sizeof(u32));
2732         pos += sizeof(u32);
2733
2734         /* VHT MCS set */
2735         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2736         pos += sizeof(vht_cap->vht_mcs);
2737
2738         return pos;
2739 }
2740
2741 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2742 {
2743         const struct ieee80211_sta_he_cap *he_cap;
2744         struct ieee80211_supported_band *sband;
2745         u8 n;
2746
2747         sband = ieee80211_get_sband(sdata);
2748         if (!sband)
2749                 return 0;
2750
2751         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2752         if (!he_cap)
2753                 return 0;
2754
2755         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2756         return 2 + 1 +
2757                sizeof(he_cap->he_cap_elem) + n +
2758                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2759                                      he_cap->he_cap_elem.phy_cap_info);
2760 }
2761
2762 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2763                               const struct ieee80211_sta_he_cap *he_cap,
2764                               u8 *end)
2765 {
2766         u8 n;
2767         u8 ie_len;
2768         u8 *orig_pos = pos;
2769
2770         /* Make sure we have place for the IE */
2771         /*
2772          * TODO: the 1 added is because this temporarily is under the EXTENSION
2773          * IE. Get rid of it when it moves.
2774          */
2775         if (!he_cap)
2776                 return orig_pos;
2777
2778         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2779         ie_len = 2 + 1 +
2780                  sizeof(he_cap->he_cap_elem) + n +
2781                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2782                                        he_cap->he_cap_elem.phy_cap_info);
2783
2784         if ((end - pos) < ie_len)
2785                 return orig_pos;
2786
2787         *pos++ = WLAN_EID_EXTENSION;
2788         pos++; /* We'll set the size later below */
2789         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2790
2791         /* Fixed data */
2792         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2793         pos += sizeof(he_cap->he_cap_elem);
2794
2795         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2796         pos += n;
2797
2798         /* Check if PPE Threshold should be present */
2799         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2800              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2801                 goto end;
2802
2803         /*
2804          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2805          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2806          */
2807         n = hweight8(he_cap->ppe_thres[0] &
2808                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2809         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2810                    IEEE80211_PPE_THRES_NSS_POS));
2811
2812         /*
2813          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2814          * total size.
2815          */
2816         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2817         n = DIV_ROUND_UP(n, 8);
2818
2819         /* Copy PPE Thresholds */
2820         memcpy(pos, &he_cap->ppe_thres, n);
2821         pos += n;
2822
2823 end:
2824         orig_pos[1] = (pos - orig_pos) - 2;
2825         return pos;
2826 }
2827
2828 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2829                                const struct cfg80211_chan_def *chandef,
2830                                u16 prot_mode, bool rifs_mode)
2831 {
2832         struct ieee80211_ht_operation *ht_oper;
2833         /* Build HT Information */
2834         *pos++ = WLAN_EID_HT_OPERATION;
2835         *pos++ = sizeof(struct ieee80211_ht_operation);
2836         ht_oper = (struct ieee80211_ht_operation *)pos;
2837         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2838                                         chandef->chan->center_freq);
2839         switch (chandef->width) {
2840         case NL80211_CHAN_WIDTH_160:
2841         case NL80211_CHAN_WIDTH_80P80:
2842         case NL80211_CHAN_WIDTH_80:
2843         case NL80211_CHAN_WIDTH_40:
2844                 if (chandef->center_freq1 > chandef->chan->center_freq)
2845                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2846                 else
2847                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2848                 break;
2849         default:
2850                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2851                 break;
2852         }
2853         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2854             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2855             chandef->width != NL80211_CHAN_WIDTH_20)
2856                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2857
2858         if (rifs_mode)
2859                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2860
2861         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2862         ht_oper->stbc_param = 0x0000;
2863
2864         /* It seems that Basic MCS set and Supported MCS set
2865            are identical for the first 10 bytes */
2866         memset(&ht_oper->basic_set, 0, 16);
2867         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2868
2869         return pos + sizeof(struct ieee80211_ht_operation);
2870 }
2871
2872 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2873                                    const struct cfg80211_chan_def *chandef)
2874 {
2875         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2876         *pos++ = 3;                                     /* IE length */
2877         /* New channel width */
2878         switch (chandef->width) {
2879         case NL80211_CHAN_WIDTH_80:
2880                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2881                 break;
2882         case NL80211_CHAN_WIDTH_160:
2883                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2884                 break;
2885         case NL80211_CHAN_WIDTH_80P80:
2886                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2887                 break;
2888         default:
2889                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2890         }
2891
2892         /* new center frequency segment 0 */
2893         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2894         /* new center frequency segment 1 */
2895         if (chandef->center_freq2)
2896                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2897         else
2898                 *pos++ = 0;
2899 }
2900
2901 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2902                                 const struct cfg80211_chan_def *chandef)
2903 {
2904         struct ieee80211_vht_operation *vht_oper;
2905
2906         *pos++ = WLAN_EID_VHT_OPERATION;
2907         *pos++ = sizeof(struct ieee80211_vht_operation);
2908         vht_oper = (struct ieee80211_vht_operation *)pos;
2909         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2910                                                         chandef->center_freq1);
2911         if (chandef->center_freq2)
2912                 vht_oper->center_freq_seg1_idx =
2913                         ieee80211_frequency_to_channel(chandef->center_freq2);
2914         else
2915                 vht_oper->center_freq_seg1_idx = 0x00;
2916
2917         switch (chandef->width) {
2918         case NL80211_CHAN_WIDTH_160:
2919                 /*
2920                  * Convert 160 MHz channel width to new style as interop
2921                  * workaround.
2922                  */
2923                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2924                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2925                 if (chandef->chan->center_freq < chandef->center_freq1)
2926                         vht_oper->center_freq_seg0_idx -= 8;
2927                 else
2928                         vht_oper->center_freq_seg0_idx += 8;
2929                 break;
2930         case NL80211_CHAN_WIDTH_80P80:
2931                 /*
2932                  * Convert 80+80 MHz channel width to new style as interop
2933                  * workaround.
2934                  */
2935                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2936                 break;
2937         case NL80211_CHAN_WIDTH_80:
2938                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2939                 break;
2940         default:
2941                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2942                 break;
2943         }
2944
2945         /* don't require special VHT peer rates */
2946         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2947
2948         return pos + sizeof(struct ieee80211_vht_operation);
2949 }
2950
2951 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2952 {
2953         struct ieee80211_he_operation *he_oper;
2954         u32 he_oper_params;
2955
2956         *pos++ = WLAN_EID_EXTENSION;
2957         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2958         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2959
2960         he_oper_params = 0;
2961         he_oper_params |= u32_encode_bits(1023, /* disabled */
2962                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2963         he_oper_params |= u32_encode_bits(1,
2964                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2965         he_oper_params |= u32_encode_bits(1,
2966                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2967
2968         he_oper = (struct ieee80211_he_operation *)pos;
2969         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2970
2971         /* don't require special HE peer rates */
2972         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2973
2974         /* TODO add VHT operational and 6GHz operational subelement? */
2975
2976         return pos + sizeof(struct ieee80211_vht_operation);
2977 }
2978
2979 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2980                                struct cfg80211_chan_def *chandef)
2981 {
2982         enum nl80211_channel_type channel_type;
2983
2984         if (!ht_oper)
2985                 return false;
2986
2987         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2988         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2989                 channel_type = NL80211_CHAN_HT20;
2990                 break;
2991         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2992                 channel_type = NL80211_CHAN_HT40PLUS;
2993                 break;
2994         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2995                 channel_type = NL80211_CHAN_HT40MINUS;
2996                 break;
2997         default:
2998                 channel_type = NL80211_CHAN_NO_HT;
2999                 return false;
3000         }
3001
3002         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3003         return true;
3004 }
3005
3006 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3007                                 const struct ieee80211_vht_operation *oper,
3008                                 const struct ieee80211_ht_operation *htop,
3009                                 struct cfg80211_chan_def *chandef)
3010 {
3011         struct cfg80211_chan_def new = *chandef;
3012         int cf0, cf1;
3013         int ccfs0, ccfs1, ccfs2;
3014         int ccf0, ccf1;
3015
3016         if (!oper || !htop)
3017                 return false;
3018
3019         ccfs0 = oper->center_freq_seg0_idx;
3020         ccfs1 = oper->center_freq_seg1_idx;
3021         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3022                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3023                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3024
3025         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3026         ccf0 = ccfs0;
3027         ccf1 = ccfs1;
3028         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3029                 ccf1 = ccfs2;
3030
3031         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3032         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3033
3034         switch (oper->chan_width) {
3035         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3036                 /* just use HT information directly */
3037                 break;
3038         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3039                 new.width = NL80211_CHAN_WIDTH_80;
3040                 new.center_freq1 = cf0;
3041                 /* If needed, adjust based on the newer interop workaround. */
3042                 if (ccf1) {
3043                         unsigned int diff;
3044
3045                         diff = abs(ccf1 - ccf0);
3046                         if (diff == 8) {
3047                                 new.width = NL80211_CHAN_WIDTH_160;
3048                                 new.center_freq1 = cf1;
3049                         } else if (diff > 8) {
3050                                 new.width = NL80211_CHAN_WIDTH_80P80;
3051                                 new.center_freq2 = cf1;
3052                         }
3053                 }
3054                 break;
3055         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3056                 /* deprecated encoding */
3057                 new.width = NL80211_CHAN_WIDTH_160;
3058                 new.center_freq1 = cf0;
3059                 break;
3060         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3061                 /* deprecated encoding */
3062                 new.width = NL80211_CHAN_WIDTH_80P80;
3063                 new.center_freq1 = cf0;
3064                 new.center_freq2 = cf1;
3065                 break;
3066         default:
3067                 return false;
3068         }
3069
3070         if (!cfg80211_chandef_valid(&new))
3071                 return false;
3072
3073         *chandef = new;
3074         return true;
3075 }
3076
3077 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3078                              const struct ieee80211_supported_band *sband,
3079                              const u8 *srates, int srates_len, u32 *rates)
3080 {
3081         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3082         int shift = ieee80211_chandef_get_shift(chandef);
3083         struct ieee80211_rate *br;
3084         int brate, rate, i, j, count = 0;
3085
3086         *rates = 0;
3087
3088         for (i = 0; i < srates_len; i++) {
3089                 rate = srates[i] & 0x7f;
3090
3091                 for (j = 0; j < sband->n_bitrates; j++) {
3092                         br = &sband->bitrates[j];
3093                         if ((rate_flags & br->flags) != rate_flags)
3094                                 continue;
3095
3096                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3097                         if (brate == rate) {
3098                                 *rates |= BIT(j);
3099                                 count++;
3100                                 break;
3101                         }
3102                 }
3103         }
3104         return count;
3105 }
3106
3107 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3108                             struct sk_buff *skb, bool need_basic,
3109                             enum nl80211_band band)
3110 {
3111         struct ieee80211_local *local = sdata->local;
3112         struct ieee80211_supported_band *sband;
3113         int rate, shift;
3114         u8 i, rates, *pos;
3115         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3116         u32 rate_flags;
3117
3118         shift = ieee80211_vif_get_shift(&sdata->vif);
3119         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3120         sband = local->hw.wiphy->bands[band];
3121         rates = 0;
3122         for (i = 0; i < sband->n_bitrates; i++) {
3123                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3124                         continue;
3125                 rates++;
3126         }
3127         if (rates > 8)
3128                 rates = 8;
3129
3130         if (skb_tailroom(skb) < rates + 2)
3131                 return -ENOMEM;
3132
3133         pos = skb_put(skb, rates + 2);
3134         *pos++ = WLAN_EID_SUPP_RATES;
3135         *pos++ = rates;
3136         for (i = 0; i < rates; i++) {
3137                 u8 basic = 0;
3138                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3139                         continue;
3140
3141                 if (need_basic && basic_rates & BIT(i))
3142                         basic = 0x80;
3143                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3144                                     5 * (1 << shift));
3145                 *pos++ = basic | (u8) rate;
3146         }
3147
3148         return 0;
3149 }
3150
3151 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3152                                 struct sk_buff *skb, bool need_basic,
3153                                 enum nl80211_band band)
3154 {
3155         struct ieee80211_local *local = sdata->local;
3156         struct ieee80211_supported_band *sband;
3157         int rate, shift;
3158         u8 i, exrates, *pos;
3159         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3160         u32 rate_flags;
3161
3162         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3163         shift = ieee80211_vif_get_shift(&sdata->vif);
3164
3165         sband = local->hw.wiphy->bands[band];
3166         exrates = 0;
3167         for (i = 0; i < sband->n_bitrates; i++) {
3168                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3169                         continue;
3170                 exrates++;
3171         }
3172
3173         if (exrates > 8)
3174                 exrates -= 8;
3175         else
3176                 exrates = 0;
3177
3178         if (skb_tailroom(skb) < exrates + 2)
3179                 return -ENOMEM;
3180
3181         if (exrates) {
3182                 pos = skb_put(skb, exrates + 2);
3183                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3184                 *pos++ = exrates;
3185                 for (i = 8; i < sband->n_bitrates; i++) {
3186                         u8 basic = 0;
3187                         if ((rate_flags & sband->bitrates[i].flags)
3188                             != rate_flags)
3189                                 continue;
3190                         if (need_basic && basic_rates & BIT(i))
3191                                 basic = 0x80;
3192                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3193                                             5 * (1 << shift));
3194                         *pos++ = basic | (u8) rate;
3195                 }
3196         }
3197         return 0;
3198 }
3199
3200 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3201 {
3202         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3203         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3204
3205         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3206                 /* non-managed type inferfaces */
3207                 return 0;
3208         }
3209         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3210 }
3211 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3212
3213 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3214 {
3215         if (!mcs)
3216                 return 1;
3217
3218         /* TODO: consider rx_highest */
3219
3220         if (mcs->rx_mask[3])
3221                 return 4;
3222         if (mcs->rx_mask[2])
3223                 return 3;
3224         if (mcs->rx_mask[1])
3225                 return 2;
3226         return 1;
3227 }
3228
3229 /**
3230  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3231  * @local: mac80211 hw info struct
3232  * @status: RX status
3233  * @mpdu_len: total MPDU length (including FCS)
3234  * @mpdu_offset: offset into MPDU to calculate timestamp at
3235  *
3236  * This function calculates the RX timestamp at the given MPDU offset, taking
3237  * into account what the RX timestamp was. An offset of 0 will just normalize
3238  * the timestamp to TSF at beginning of MPDU reception.
3239  */
3240 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3241                                      struct ieee80211_rx_status *status,
3242                                      unsigned int mpdu_len,
3243                                      unsigned int mpdu_offset)
3244 {
3245         u64 ts = status->mactime;
3246         struct rate_info ri;
3247         u16 rate;
3248
3249         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3250                 return 0;
3251
3252         memset(&ri, 0, sizeof(ri));
3253
3254         ri.bw = status->bw;
3255
3256         /* Fill cfg80211 rate info */
3257         switch (status->encoding) {
3258         case RX_ENC_HT:
3259                 ri.mcs = status->rate_idx;
3260                 ri.flags |= RATE_INFO_FLAGS_MCS;
3261                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3262                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3263                 break;
3264         case RX_ENC_VHT:
3265                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3266                 ri.mcs = status->rate_idx;
3267                 ri.nss = status->nss;
3268                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3269                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3270                 break;
3271         default:
3272                 WARN_ON(1);
3273                 /* fall through */
3274         case RX_ENC_LEGACY: {
3275                 struct ieee80211_supported_band *sband;
3276                 int shift = 0;
3277                 int bitrate;
3278
3279                 switch (status->bw) {
3280                 case RATE_INFO_BW_10:
3281                         shift = 1;
3282                         break;
3283                 case RATE_INFO_BW_5:
3284                         shift = 2;
3285                         break;
3286                 }
3287
3288                 sband = local->hw.wiphy->bands[status->band];
3289                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3290                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3291
3292                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3293                         /* TODO: handle HT/VHT preambles */
3294                         if (status->band == NL80211_BAND_5GHZ) {
3295                                 ts += 20 << shift;
3296                                 mpdu_offset += 2;
3297                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3298                                 ts += 96;
3299                         } else {
3300                                 ts += 192;
3301                         }
3302                 }
3303                 break;
3304                 }
3305         }
3306
3307         rate = cfg80211_calculate_bitrate(&ri);
3308         if (WARN_ONCE(!rate,
3309                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3310                       (unsigned long long)status->flag, status->rate_idx,
3311                       status->nss))
3312                 return 0;
3313
3314         /* rewind from end of MPDU */
3315         if (status->flag & RX_FLAG_MACTIME_END)
3316                 ts -= mpdu_len * 8 * 10 / rate;
3317
3318         ts += mpdu_offset * 8 * 10 / rate;
3319
3320         return ts;
3321 }
3322
3323 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3324 {
3325         struct ieee80211_sub_if_data *sdata;
3326         struct cfg80211_chan_def chandef;
3327
3328         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3329         ASSERT_RTNL();
3330
3331         mutex_lock(&local->mtx);
3332         list_for_each_entry(sdata, &local->interfaces, list) {
3333                 /* it might be waiting for the local->mtx, but then
3334                  * by the time it gets it, sdata->wdev.cac_started
3335                  * will no longer be true
3336                  */
3337                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3338
3339                 if (sdata->wdev.cac_started) {
3340                         chandef = sdata->vif.bss_conf.chandef;
3341                         ieee80211_vif_release_channel(sdata);
3342                         cfg80211_cac_event(sdata->dev,
3343                                            &chandef,
3344                                            NL80211_RADAR_CAC_ABORTED,
3345                                            GFP_KERNEL);
3346                 }
3347         }
3348         mutex_unlock(&local->mtx);
3349 }
3350
3351 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3352 {
3353         struct ieee80211_local *local =
3354                 container_of(work, struct ieee80211_local, radar_detected_work);
3355         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3356         struct ieee80211_chanctx *ctx;
3357         int num_chanctx = 0;
3358
3359         mutex_lock(&local->chanctx_mtx);
3360         list_for_each_entry(ctx, &local->chanctx_list, list) {
3361                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3362                         continue;
3363
3364                 num_chanctx++;
3365                 chandef = ctx->conf.def;
3366         }
3367         mutex_unlock(&local->chanctx_mtx);
3368
3369         rtnl_lock();
3370         ieee80211_dfs_cac_cancel(local);
3371         rtnl_unlock();
3372
3373         if (num_chanctx > 1)
3374                 /* XXX: multi-channel is not supported yet */
3375                 WARN_ON(1);
3376         else
3377                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3378 }
3379
3380 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3381 {
3382         struct ieee80211_local *local = hw_to_local(hw);
3383
3384         trace_api_radar_detected(local);
3385
3386         schedule_work(&local->radar_detected_work);
3387 }
3388 EXPORT_SYMBOL(ieee80211_radar_detected);
3389
3390 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3391 {
3392         u32 ret;
3393         int tmp;
3394
3395         switch (c->width) {
3396         case NL80211_CHAN_WIDTH_20:
3397                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3398                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3399                 break;
3400         case NL80211_CHAN_WIDTH_40:
3401                 c->width = NL80211_CHAN_WIDTH_20;
3402                 c->center_freq1 = c->chan->center_freq;
3403                 ret = IEEE80211_STA_DISABLE_40MHZ |
3404                       IEEE80211_STA_DISABLE_VHT;
3405                 break;
3406         case NL80211_CHAN_WIDTH_80:
3407                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3408                 /* n_P40 */
3409                 tmp /= 2;
3410                 /* freq_P40 */
3411                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3412                 c->width = NL80211_CHAN_WIDTH_40;
3413                 ret = IEEE80211_STA_DISABLE_VHT;
3414                 break;
3415         case NL80211_CHAN_WIDTH_80P80:
3416                 c->center_freq2 = 0;
3417                 c->width = NL80211_CHAN_WIDTH_80;
3418                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3419                       IEEE80211_STA_DISABLE_160MHZ;
3420                 break;
3421         case NL80211_CHAN_WIDTH_160:
3422                 /* n_P20 */
3423                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3424                 /* n_P80 */
3425                 tmp /= 4;
3426                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3427                 c->width = NL80211_CHAN_WIDTH_80;
3428                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3429                       IEEE80211_STA_DISABLE_160MHZ;
3430                 break;
3431         default:
3432         case NL80211_CHAN_WIDTH_20_NOHT:
3433                 WARN_ON_ONCE(1);
3434                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3435                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3436                 break;
3437         case NL80211_CHAN_WIDTH_5:
3438         case NL80211_CHAN_WIDTH_10:
3439                 WARN_ON_ONCE(1);
3440                 /* keep c->width */
3441                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3442                 break;
3443         }
3444
3445         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3446
3447         return ret;
3448 }
3449
3450 /*
3451  * Returns true if smps_mode_new is strictly more restrictive than
3452  * smps_mode_old.
3453  */
3454 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3455                                    enum ieee80211_smps_mode smps_mode_new)
3456 {
3457         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3458                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3459                 return false;
3460
3461         switch (smps_mode_old) {
3462         case IEEE80211_SMPS_STATIC:
3463                 return false;
3464         case IEEE80211_SMPS_DYNAMIC:
3465                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3466         case IEEE80211_SMPS_OFF:
3467                 return smps_mode_new != IEEE80211_SMPS_OFF;
3468         default:
3469                 WARN_ON(1);
3470         }
3471
3472         return false;
3473 }
3474
3475 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3476                               struct cfg80211_csa_settings *csa_settings)
3477 {
3478         struct sk_buff *skb;
3479         struct ieee80211_mgmt *mgmt;
3480         struct ieee80211_local *local = sdata->local;
3481         int freq;
3482         int hdr_len = offsetofend(struct ieee80211_mgmt,
3483                                   u.action.u.chan_switch);
3484         u8 *pos;
3485
3486         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3487             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3488                 return -EOPNOTSUPP;
3489
3490         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3491                             5 + /* channel switch announcement element */
3492                             3 + /* secondary channel offset element */
3493                             5 + /* wide bandwidth channel switch announcement */
3494                             8); /* mesh channel switch parameters element */
3495         if (!skb)
3496                 return -ENOMEM;
3497
3498         skb_reserve(skb, local->tx_headroom);
3499         mgmt = skb_put_zero(skb, hdr_len);
3500         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3501                                           IEEE80211_STYPE_ACTION);
3502
3503         eth_broadcast_addr(mgmt->da);
3504         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3505         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3506                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3507         } else {
3508                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3509                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3510         }
3511         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3512         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3513         pos = skb_put(skb, 5);
3514         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3515         *pos++ = 3;                                             /* IE length */
3516         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3517         freq = csa_settings->chandef.chan->center_freq;
3518         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3519         *pos++ = csa_settings->count;                           /* count */
3520
3521         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3522                 enum nl80211_channel_type ch_type;
3523
3524                 skb_put(skb, 3);
3525                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3526                 *pos++ = 1;                                     /* IE length */
3527                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3528                 if (ch_type == NL80211_CHAN_HT40PLUS)
3529                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3530                 else
3531                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3532         }
3533
3534         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3535                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3536
3537                 skb_put(skb, 8);
3538                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3539                 *pos++ = 6;                                     /* IE length */
3540                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3541                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3542                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3543                 *pos++ |= csa_settings->block_tx ?
3544                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3545                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3546                 pos += 2;
3547                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3548                 pos += 2;
3549         }
3550
3551         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3552             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3553             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3554                 skb_put(skb, 5);
3555                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3556         }
3557
3558         ieee80211_tx_skb(sdata, skb);
3559         return 0;
3560 }
3561
3562 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3563 {
3564         return !(cs == NULL || cs->cipher == 0 ||
3565                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3566                  cs->hdr_len <= cs->key_idx_off ||
3567                  cs->key_idx_shift > 7 ||
3568                  cs->key_idx_mask == 0);
3569 }
3570
3571 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3572 {
3573         int i;
3574
3575         /* Ensure we have enough iftype bitmap space for all iftype values */
3576         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3577
3578         for (i = 0; i < n; i++)
3579                 if (!ieee80211_cs_valid(&cs[i]))
3580                         return false;
3581
3582         return true;
3583 }
3584
3585 const struct ieee80211_cipher_scheme *
3586 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3587                  enum nl80211_iftype iftype)
3588 {
3589         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3590         int n = local->hw.n_cipher_schemes;
3591         int i;
3592         const struct ieee80211_cipher_scheme *cs = NULL;
3593
3594         for (i = 0; i < n; i++) {
3595                 if (l[i].cipher == cipher) {
3596                         cs = &l[i];
3597                         break;
3598                 }
3599         }
3600
3601         if (!cs || !(cs->iftype & BIT(iftype)))
3602                 return NULL;
3603
3604         return cs;
3605 }
3606
3607 int ieee80211_cs_headroom(struct ieee80211_local *local,
3608                           struct cfg80211_crypto_settings *crypto,
3609                           enum nl80211_iftype iftype)
3610 {
3611         const struct ieee80211_cipher_scheme *cs;
3612         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3613         int i;
3614
3615         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3616                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3617                                       iftype);
3618
3619                 if (cs && headroom < cs->hdr_len)
3620                         headroom = cs->hdr_len;
3621         }
3622
3623         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3624         if (cs && headroom < cs->hdr_len)
3625                 headroom = cs->hdr_len;
3626
3627         return headroom;
3628 }
3629
3630 static bool
3631 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3632 {
3633         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3634         int skip;
3635
3636         if (end > 0)
3637                 return false;
3638
3639         /* One shot NOA  */
3640         if (data->count[i] == 1)
3641                 return false;
3642
3643         if (data->desc[i].interval == 0)
3644                 return false;
3645
3646         /* End time is in the past, check for repetitions */
3647         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3648         if (data->count[i] < 255) {
3649                 if (data->count[i] <= skip) {
3650                         data->count[i] = 0;
3651                         return false;
3652                 }
3653
3654                 data->count[i] -= skip;
3655         }
3656
3657         data->desc[i].start += skip * data->desc[i].interval;
3658
3659         return true;
3660 }
3661
3662 static bool
3663 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3664                              s32 *offset)
3665 {
3666         bool ret = false;
3667         int i;
3668
3669         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3670                 s32 cur;
3671
3672                 if (!data->count[i])
3673                         continue;
3674
3675                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3676                         ret = true;
3677
3678                 cur = data->desc[i].start - tsf;
3679                 if (cur > *offset)
3680                         continue;
3681
3682                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3683                 if (cur > *offset)
3684                         *offset = cur;
3685         }
3686
3687         return ret;
3688 }
3689
3690 static u32
3691 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3692 {
3693         s32 offset = 0;
3694         int tries = 0;
3695         /*
3696          * arbitrary limit, used to avoid infinite loops when combined NoA
3697          * descriptors cover the full time period.
3698          */
3699         int max_tries = 5;
3700
3701         ieee80211_extend_absent_time(data, tsf, &offset);
3702         do {
3703                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3704                         break;
3705
3706                 tries++;
3707         } while (tries < max_tries);
3708
3709         return offset;
3710 }
3711
3712 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3713 {
3714         u32 next_offset = BIT(31) - 1;
3715         int i;
3716
3717         data->absent = 0;
3718         data->has_next_tsf = false;
3719         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3720                 s32 start;
3721
3722                 if (!data->count[i])
3723                         continue;
3724
3725                 ieee80211_extend_noa_desc(data, tsf, i);
3726                 start = data->desc[i].start - tsf;
3727                 if (start <= 0)
3728                         data->absent |= BIT(i);
3729
3730                 if (next_offset > start)
3731                         next_offset = start;
3732
3733                 data->has_next_tsf = true;
3734         }
3735
3736         if (data->absent)
3737                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3738
3739         data->next_tsf = tsf + next_offset;
3740 }
3741 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3742
3743 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3744                             struct ieee80211_noa_data *data, u32 tsf)
3745 {
3746         int ret = 0;
3747         int i;
3748
3749         memset(data, 0, sizeof(*data));
3750
3751         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3752                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3753
3754                 if (!desc->count || !desc->duration)
3755                         continue;
3756
3757                 data->count[i] = desc->count;
3758                 data->desc[i].start = le32_to_cpu(desc->start_time);
3759                 data->desc[i].duration = le32_to_cpu(desc->duration);
3760                 data->desc[i].interval = le32_to_cpu(desc->interval);
3761
3762                 if (data->count[i] > 1 &&
3763                     data->desc[i].interval < data->desc[i].duration)
3764                         continue;
3765
3766                 ieee80211_extend_noa_desc(data, tsf, i);
3767                 ret++;
3768         }
3769
3770         if (ret)
3771                 ieee80211_update_p2p_noa(data, tsf);
3772
3773         return ret;
3774 }
3775 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3776
3777 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3778                            struct ieee80211_sub_if_data *sdata)
3779 {
3780         u64 tsf = drv_get_tsf(local, sdata);
3781         u64 dtim_count = 0;
3782         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3783         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3784         struct ps_data *ps;
3785         u8 bcns_from_dtim;
3786
3787         if (tsf == -1ULL || !beacon_int || !dtim_period)
3788                 return;
3789
3790         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3791             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3792                 if (!sdata->bss)
3793                         return;
3794
3795                 ps = &sdata->bss->ps;
3796         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3797                 ps = &sdata->u.mesh.ps;
3798         } else {
3799                 return;
3800         }
3801
3802         /*
3803          * actually finds last dtim_count, mac80211 will update in
3804          * __beacon_add_tim().
3805          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3806          */
3807         do_div(tsf, beacon_int);
3808         bcns_from_dtim = do_div(tsf, dtim_period);
3809         /* just had a DTIM */
3810         if (!bcns_from_dtim)
3811                 dtim_count = 0;
3812         else
3813                 dtim_count = dtim_period - bcns_from_dtim;
3814
3815         ps->dtim_count = dtim_count;
3816 }
3817
3818 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3819                                          struct ieee80211_chanctx *ctx)
3820 {
3821         struct ieee80211_sub_if_data *sdata;
3822         u8 radar_detect = 0;
3823
3824         lockdep_assert_held(&local->chanctx_mtx);
3825
3826         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3827                 return 0;
3828
3829         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3830                 if (sdata->reserved_radar_required)
3831                         radar_detect |= BIT(sdata->reserved_chandef.width);
3832
3833         /*
3834          * An in-place reservation context should not have any assigned vifs
3835          * until it replaces the other context.
3836          */
3837         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3838                 !list_empty(&ctx->assigned_vifs));
3839
3840         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3841                 if (sdata->radar_required)
3842                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3843
3844         return radar_detect;
3845 }
3846
3847 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3848                                  const struct cfg80211_chan_def *chandef,
3849                                  enum ieee80211_chanctx_mode chanmode,
3850                                  u8 radar_detect)
3851 {
3852         struct ieee80211_local *local = sdata->local;
3853         struct ieee80211_sub_if_data *sdata_iter;
3854         enum nl80211_iftype iftype = sdata->wdev.iftype;
3855         struct ieee80211_chanctx *ctx;
3856         int total = 1;
3857         struct iface_combination_params params = {
3858                 .radar_detect = radar_detect,
3859         };
3860
3861         lockdep_assert_held(&local->chanctx_mtx);
3862
3863         if (WARN_ON(hweight32(radar_detect) > 1))
3864                 return -EINVAL;
3865
3866         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3867                     !chandef->chan))
3868                 return -EINVAL;
3869
3870         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3871                 return -EINVAL;
3872
3873         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3874             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3875                 /*
3876                  * always passing this is harmless, since it'll be the
3877                  * same value that cfg80211 finds if it finds the same
3878                  * interface ... and that's always allowed
3879                  */
3880                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3881         }
3882
3883         /* Always allow software iftypes */
3884         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3885                 if (radar_detect)
3886                         return -EINVAL;
3887                 return 0;
3888         }
3889
3890         if (chandef)
3891                 params.num_different_channels = 1;
3892
3893         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3894                 params.iftype_num[iftype] = 1;
3895
3896         list_for_each_entry(ctx, &local->chanctx_list, list) {
3897                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3898                         continue;
3899                 params.radar_detect |=
3900                         ieee80211_chanctx_radar_detect(local, ctx);
3901                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3902                         params.num_different_channels++;
3903                         continue;
3904                 }
3905                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3906                     cfg80211_chandef_compatible(chandef,
3907                                                 &ctx->conf.def))
3908                         continue;
3909                 params.num_different_channels++;
3910         }
3911
3912         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3913                 struct wireless_dev *wdev_iter;
3914
3915                 wdev_iter = &sdata_iter->wdev;
3916
3917                 if (sdata_iter == sdata ||
3918                     !ieee80211_sdata_running(sdata_iter) ||
3919                     cfg80211_iftype_allowed(local->hw.wiphy,
3920                                             wdev_iter->iftype, 0, 1))
3921                         continue;
3922
3923                 params.iftype_num[wdev_iter->iftype]++;
3924                 total++;
3925         }
3926
3927         if (total == 1 && !params.radar_detect)
3928                 return 0;
3929
3930         return cfg80211_check_combinations(local->hw.wiphy, &params);
3931 }
3932
3933 static void
3934 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3935                          void *data)
3936 {
3937         u32 *max_num_different_channels = data;
3938
3939         *max_num_different_channels = max(*max_num_different_channels,
3940                                           c->num_different_channels);
3941 }
3942
3943 int ieee80211_max_num_channels(struct ieee80211_local *local)
3944 {
3945         struct ieee80211_sub_if_data *sdata;
3946         struct ieee80211_chanctx *ctx;
3947         u32 max_num_different_channels = 1;
3948         int err;
3949         struct iface_combination_params params = {0};
3950
3951         lockdep_assert_held(&local->chanctx_mtx);
3952
3953         list_for_each_entry(ctx, &local->chanctx_list, list) {
3954                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3955                         continue;
3956
3957                 params.num_different_channels++;
3958
3959                 params.radar_detect |=
3960                         ieee80211_chanctx_radar_detect(local, ctx);
3961         }
3962
3963         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3964                 params.iftype_num[sdata->wdev.iftype]++;
3965
3966         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3967                                          ieee80211_iter_max_chans,
3968                                          &max_num_different_channels);
3969         if (err < 0)
3970                 return err;
3971
3972         return max_num_different_channels;
3973 }
3974
3975 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3976 {
3977         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3978         *buf++ = 7; /* len */
3979         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3980         *buf++ = 0x50;
3981         *buf++ = 0xf2;
3982         *buf++ = 2; /* WME */
3983         *buf++ = 0; /* WME info */
3984         *buf++ = 1; /* WME ver */
3985         *buf++ = qosinfo; /* U-APSD no in use */
3986
3987         return buf;
3988 }
3989
3990 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3991                              unsigned long *frame_cnt,
3992                              unsigned long *byte_cnt)
3993 {
3994         struct txq_info *txqi = to_txq_info(txq);
3995         u32 frag_cnt = 0, frag_bytes = 0;
3996         struct sk_buff *skb;
3997
3998         skb_queue_walk(&txqi->frags, skb) {
3999                 frag_cnt++;
4000                 frag_bytes += skb->len;
4001         }
4002
4003         if (frame_cnt)
4004                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4005
4006         if (byte_cnt)
4007                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4008 }
4009 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4010
4011 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4012         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4013         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4014         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4015         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4016 };