net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   8  * Copyright (C) 2018 Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * utilities for mac80211
  15  */
  16
  17 #include <net/mac80211.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/export.h>
  20 #include <linux/types.h>
  21 #include <linux/slab.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/bitmap.h>
  26 #include <linux/crc32.h>
  27 #include <net/net_namespace.h>
  28 #include <net/cfg80211.h>
  29 #include <net/rtnetlink.h>
  30
  31 #include "ieee80211_i.h"
  32 #include "driver-ops.h"
  33 #include "rate.h"
  34 #include "mesh.h"
  35 #include "wme.h"
  36 #include "led.h"
  37 #include "wep.h"
  38
  39 /* privid for wiphys to determine whether they belong to us or not */
  40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  41
  42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  43 {
  44         struct ieee80211_local *local;
  45         BUG_ON(!wiphy);
  46
  47         local = wiphy_priv(wiphy);
  48         return &local->hw;
  49 }
  50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  51
  52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  53 {
  54         struct sk_buff *skb;
  55         struct ieee80211_hdr *hdr;
  56
  57         skb_queue_walk(&tx->skbs, skb) {
  58                 hdr = (struct ieee80211_hdr *) skb->data;
  59                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  60         }
  61 }
  62
  63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  64                              int rate, int erp, int short_preamble,
  65                              int shift)
  66 {
  67         int dur;
  68
  69         /* calculate duration (in microseconds, rounded up to next higher
  70          * integer if it includes a fractional microsecond) to send frame of
  71          * len bytes (does not include FCS) at the given rate. Duration will
  72          * also include SIFS.
  73          *
  74          * rate is in 100 kbps, so divident is multiplied by 10 in the
  75          * DIV_ROUND_UP() operations.
  76          *
  77          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  78          * is assumed to be 0 otherwise.
  79          */
  80
  81         if (band == NL80211_BAND_5GHZ || erp) {
  82                 /*
  83                  * OFDM:
  84                  *
  85                  * N_DBPS = DATARATE x 4
  86                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  87                  *      (16 = SIGNAL time, 6 = tail bits)
  88                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  89                  *
  90                  * T_SYM = 4 usec
  91                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  92                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  93                  *      signal ext = 6 usec
  94                  */
  95                 dur = 16; /* SIFS + signal ext */
  96                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  97                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  98
  99                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 100                  *  * times 4 for 5 MHz
 101                  *  * times 2 for 10 MHz
 102                  */
 103                 dur *= 1 << shift;
 104
 105                 /* rates should already consider the channel bandwidth,
 106                  * don't apply divisor again.
 107                  */
 108                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 109                                         4 * rate); /* T_SYM x N_SYM */
 110         } else {
 111                 /*
 112                  * 802.11b or 802.11g with 802.11b compatibility:
 113                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 114                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 115                  *
 116                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 117                  * aSIFSTime = 10 usec
 118                  * aPreambleLength = 144 usec or 72 usec with short preamble
 119                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 120                  */
 121                 dur = 10; /* aSIFSTime = 10 usec */
 122                 dur += short_preamble ? (72 + 24) : (144 + 48);
 123
 124                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 125         }
 126
 127         return dur;
 128 }
 129
 130 /* Exported duration function for driver use */
 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 132                                         struct ieee80211_vif *vif,
 133                                         enum nl80211_band band,
 134                                         size_t frame_len,
 135                                         struct ieee80211_rate *rate)
 136 {
 137         struct ieee80211_sub_if_data *sdata;
 138         u16 dur;
 139         int erp, shift = 0;
 140         bool short_preamble = false;
 141
 142         erp = 0;
 143         if (vif) {
 144                 sdata = vif_to_sdata(vif);
 145                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 146                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 147                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 148                 shift = ieee80211_vif_get_shift(vif);
 149         }
 150
 151         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 152                                        short_preamble, shift);
 153
 154         return cpu_to_le16(dur);
 155 }
 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 157
 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 159                               struct ieee80211_vif *vif, size_t frame_len,
 160                               const struct ieee80211_tx_info *frame_txctl)
 161 {
 162         struct ieee80211_local *local = hw_to_local(hw);
 163         struct ieee80211_rate *rate;
 164         struct ieee80211_sub_if_data *sdata;
 165         bool short_preamble;
 166         int erp, shift = 0, bitrate;
 167         u16 dur;
 168         struct ieee80211_supported_band *sband;
 169
 170         sband = local->hw.wiphy->bands[frame_txctl->band];
 171
 172         short_preamble = false;
 173
 174         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 175
 176         erp = 0;
 177         if (vif) {
 178                 sdata = vif_to_sdata(vif);
 179                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 180                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 181                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 182                 shift = ieee80211_vif_get_shift(vif);
 183         }
 184
 185         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 186
 187         /* CTS duration */
 188         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 189                                        erp, short_preamble, shift);
 190         /* Data frame duration */
 191         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 192                                         erp, short_preamble, shift);
 193         /* ACK duration */
 194         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 195                                         erp, short_preamble, shift);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_rts_duration);
 200
 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 202                                     struct ieee80211_vif *vif,
 203                                     size_t frame_len,
 204                                     const struct ieee80211_tx_info *frame_txctl)
 205 {
 206         struct ieee80211_local *local = hw_to_local(hw);
 207         struct ieee80211_rate *rate;
 208         struct ieee80211_sub_if_data *sdata;
 209         bool short_preamble;
 210         int erp, shift = 0, bitrate;
 211         u16 dur;
 212         struct ieee80211_supported_band *sband;
 213
 214         sband = local->hw.wiphy->bands[frame_txctl->band];
 215
 216         short_preamble = false;
 217
 218         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225                 shift = ieee80211_vif_get_shift(vif);
 226         }
 227
 228         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 229
 230         /* Data frame duration */
 231         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 232                                        erp, short_preamble, shift);
 233         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 234                 /* ACK duration */
 235                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                                 erp, short_preamble, shift);
 237         }
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 242
 243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 244 {
 245         struct ieee80211_local *local = sdata->local;
 246         struct ieee80211_vif *vif = &sdata->vif;
 247         struct fq *fq = &local->fq;
 248         struct ps_data *ps = NULL;
 249         struct txq_info *txqi;
 250         struct sta_info *sta;
 251         int i;
 252
 253         spin_lock_bh(&fq->lock);
 254
 255         if (sdata->vif.type == NL80211_IFTYPE_AP)
 256                 ps = &sdata->bss->ps;
 257
 258         sdata->vif.txqs_stopped[ac] = false;
 259
 260         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 261                 if (sdata != sta->sdata)
 262                         continue;
 263
 264                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 265                         struct ieee80211_txq *txq = sta->sta.txq[i];
 266
 267                         if (!txq)
 268                                 continue;
 269
 270                         txqi = to_txq_info(txq);
 271
 272                         if (ac != txq->ac)
 273                                 continue;
 274
 275                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 276                                                 &txqi->flags))
 277                                 continue;
 278
 279                         spin_unlock_bh(&fq->lock);
 280                         drv_wake_tx_queue(local, txqi);
 281                         spin_lock_bh(&fq->lock);
 282                 }
 283         }
 284
 285         if (!vif->txq)
 286                 goto out;
 287
 288         txqi = to_txq_info(vif->txq);
 289
 290         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 291             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 292                 goto out;
 293
 294         spin_unlock_bh(&fq->lock);
 295
 296         drv_wake_tx_queue(local, txqi);
 297         return;
 298 out:
 299         spin_unlock_bh(&fq->lock);
 300 }
 301
 302 void ieee80211_wake_txqs(unsigned long data)
 303 {
 304         struct ieee80211_local *local = (struct ieee80211_local *)data;
 305         struct ieee80211_sub_if_data *sdata;
 306         int n_acs = IEEE80211_NUM_ACS;
 307         unsigned long flags;
 308         int i;
 309
 310         rcu_read_lock();
 311         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 312
 313         if (local->hw.queues < IEEE80211_NUM_ACS)
 314                 n_acs = 1;
 315
 316         for (i = 0; i < local->hw.queues; i++) {
 317                 if (local->queue_stop_reasons[i])
 318                         continue;
 319
 320                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 321                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 322                         int ac;
 323
 324                         for (ac = 0; ac < n_acs; ac++) {
 325                                 int ac_queue = sdata->vif.hw_queue[ac];
 326
 327                                 if (ac_queue == i ||
 328                                     sdata->vif.cab_queue == i)
 329                                         __ieee80211_wake_txqs(sdata, ac);
 330                         }
 331                 }
 332                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 333         }
 334
 335         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 336         rcu_read_unlock();
 337 }
 338
 339 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 340 {
 341         struct ieee80211_sub_if_data *sdata;
 342         int n_acs = IEEE80211_NUM_ACS;
 343
 344         if (local->ops->wake_tx_queue)
 345                 return;
 346
 347         if (local->hw.queues < IEEE80211_NUM_ACS)
 348                 n_acs = 1;
 349
 350         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 351                 int ac;
 352
 353                 if (!sdata->dev)
 354                         continue;
 355
 356                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 357                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 358                         continue;
 359
 360                 for (ac = 0; ac < n_acs; ac++) {
 361                         int ac_queue = sdata->vif.hw_queue[ac];
 362
 363                         if (ac_queue == queue ||
 364                             (sdata->vif.cab_queue == queue &&
 365                              local->queue_stop_reasons[ac_queue] == 0 &&
 366                              skb_queue_empty(&local->pending[ac_queue])))
 367                                 netif_wake_subqueue(sdata->dev, ac);
 368                 }
 369         }
 370 }
 371
 372 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 373                                    enum queue_stop_reason reason,
 374                                    bool refcounted)
 375 {
 376         struct ieee80211_local *local = hw_to_local(hw);
 377
 378         trace_wake_queue(local, queue, reason);
 379
 380         if (WARN_ON(queue >= hw->queues))
 381                 return;
 382
 383         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 384                 return;
 385
 386         if (!refcounted) {
 387                 local->q_stop_reasons[queue][reason] = 0;
 388         } else {
 389                 local->q_stop_reasons[queue][reason]--;
 390                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 391                         local->q_stop_reasons[queue][reason] = 0;
 392         }
 393
 394         if (local->q_stop_reasons[queue][reason] == 0)
 395                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 396
 397         if (local->queue_stop_reasons[queue] != 0)
 398                 /* someone still has this queue stopped */
 399                 return;
 400
 401         if (skb_queue_empty(&local->pending[queue])) {
 402                 rcu_read_lock();
 403                 ieee80211_propagate_queue_wake(local, queue);
 404                 rcu_read_unlock();
 405         } else
 406                 tasklet_schedule(&local->tx_pending_tasklet);
 407
 408         if (local->ops->wake_tx_queue)
 409                 tasklet_schedule(&local->wake_txqs_tasklet);
 410 }
 411
 412 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 413                                     enum queue_stop_reason reason,
 414                                     bool refcounted)
 415 {
 416         struct ieee80211_local *local = hw_to_local(hw);
 417         unsigned long flags;
 418
 419         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 420         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 421         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 422 }
 423
 424 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 425 {
 426         ieee80211_wake_queue_by_reason(hw, queue,
 427                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 428                                        false);
 429 }
 430 EXPORT_SYMBOL(ieee80211_wake_queue);
 431
 432 static void __ieee80211_stop_queue(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         struct ieee80211_sub_if_data *sdata;
 438         int n_acs = IEEE80211_NUM_ACS;
 439
 440         trace_stop_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!refcounted)
 446                 local->q_stop_reasons[queue][reason] = 1;
 447         else
 448                 local->q_stop_reasons[queue][reason]++;
 449
 450         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 451                 return;
 452
 453         if (local->hw.queues < IEEE80211_NUM_ACS)
 454                 n_acs = 1;
 455
 456         rcu_read_lock();
 457         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 458                 int ac;
 459
 460                 if (!sdata->dev)
 461                         continue;
 462
 463                 for (ac = 0; ac < n_acs; ac++) {
 464                         if (sdata->vif.hw_queue[ac] == queue ||
 465                             sdata->vif.cab_queue == queue) {
 466                                 if (!local->ops->wake_tx_queue) {
 467                                         netif_stop_subqueue(sdata->dev, ac);
 468                                         continue;
 469                                 }
 470                                 spin_lock(&local->fq.lock);
 471                                 sdata->vif.txqs_stopped[ac] = true;
 472                                 spin_unlock(&local->fq.lock);
 473                         }
 474                 }
 475         }
 476         rcu_read_unlock();
 477 }
 478
 479 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 480                                     enum queue_stop_reason reason,
 481                                     bool refcounted)
 482 {
 483         struct ieee80211_local *local = hw_to_local(hw);
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 487         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 489 }
 490
 491 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 492 {
 493         ieee80211_stop_queue_by_reason(hw, queue,
 494                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 495                                        false);
 496 }
 497 EXPORT_SYMBOL(ieee80211_stop_queue);
 498
 499 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 500                                struct sk_buff *skb)
 501 {
 502         struct ieee80211_hw *hw = &local->hw;
 503         unsigned long flags;
 504         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 505         int queue = info->hw_queue;
 506
 507         if (WARN_ON(!info->control.vif)) {
 508                 ieee80211_free_txskb(&local->hw, skb);
 509                 return;
 510         }
 511
 512         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 513         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 514                                false);
 515         __skb_queue_tail(&local->pending[queue], skb);
 516         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 517                                false);
 518         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 519 }
 520
 521 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 522                                 struct sk_buff_head *skbs)
 523 {
 524         struct ieee80211_hw *hw = &local->hw;
 525         struct sk_buff *skb;
 526         unsigned long flags;
 527         int queue, i;
 528
 529         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 530         while ((skb = skb_dequeue(skbs))) {
 531                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 532
 533                 if (WARN_ON(!info->control.vif)) {
 534                         ieee80211_free_txskb(&local->hw, skb);
 535                         continue;
 536                 }
 537
 538                 queue = info->hw_queue;
 539
 540                 __ieee80211_stop_queue(hw, queue,
 541                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 542                                 false);
 543
 544                 __skb_queue_tail(&local->pending[queue], skb);
 545         }
 546
 547         for (i = 0; i < hw->queues; i++)
 548                 __ieee80211_wake_queue(hw, i,
 549                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 550                         false);
 551         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 552 }
 553
 554 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 555                                      unsigned long queues,
 556                                      enum queue_stop_reason reason,
 557                                      bool refcounted)
 558 {
 559         struct ieee80211_local *local = hw_to_local(hw);
 560         unsigned long flags;
 561         int i;
 562
 563         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 564
 565         for_each_set_bit(i, &queues, hw->queues)
 566                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 567
 568         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 569 }
 570
 571 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 572 {
 573         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 574                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 575                                         false);
 576 }
 577 EXPORT_SYMBOL(ieee80211_stop_queues);
 578
 579 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 580 {
 581         struct ieee80211_local *local = hw_to_local(hw);
 582         unsigned long flags;
 583         int ret;
 584
 585         if (WARN_ON(queue >= hw->queues))
 586                 return true;
 587
 588         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 589         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 590                        &local->queue_stop_reasons[queue]);
 591         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 592         return ret;
 593 }
 594 EXPORT_SYMBOL(ieee80211_queue_stopped);
 595
 596 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 597                                      unsigned long queues,
 598                                      enum queue_stop_reason reason,
 599                                      bool refcounted)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int i;
 604
 605         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 606
 607         for_each_set_bit(i, &queues, hw->queues)
 608                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 609
 610         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 611 }
 612
 613 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 614 {
 615         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 616                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 617                                         false);
 618 }
 619 EXPORT_SYMBOL(ieee80211_wake_queues);
 620
 621 static unsigned int
 622 ieee80211_get_vif_queues(struct ieee80211_local *local,
 623                          struct ieee80211_sub_if_data *sdata)
 624 {
 625         unsigned int queues;
 626
 627         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 628                 int ac;
 629
 630                 queues = 0;
 631
 632                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 633                         queues |= BIT(sdata->vif.hw_queue[ac]);
 634                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 635                         queues |= BIT(sdata->vif.cab_queue);
 636         } else {
 637                 /* all queues */
 638                 queues = BIT(local->hw.queues) - 1;
 639         }
 640
 641         return queues;
 642 }
 643
 644 void __ieee80211_flush_queues(struct ieee80211_local *local,
 645                               struct ieee80211_sub_if_data *sdata,
 646                               unsigned int queues, bool drop)
 647 {
 648         if (!local->ops->flush)
 649                 return;
 650
 651         /*
 652          * If no queue was set, or if the HW doesn't support
 653          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 654          */
 655         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 656                 queues = ieee80211_get_vif_queues(local, sdata);
 657
 658         ieee80211_stop_queues_by_reason(&local->hw, queues,
 659                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 660                                         false);
 661
 662         drv_flush(local, sdata, queues, drop);
 663
 664         ieee80211_wake_queues_by_reason(&local->hw, queues,
 665                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 666                                         false);
 667 }
 668
 669 void ieee80211_flush_queues(struct ieee80211_local *local,
 670                             struct ieee80211_sub_if_data *sdata, bool drop)
 671 {
 672         __ieee80211_flush_queues(local, sdata, 0, drop);
 673 }
 674
 675 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 676                                struct ieee80211_sub_if_data *sdata,
 677                                enum queue_stop_reason reason)
 678 {
 679         ieee80211_stop_queues_by_reason(&local->hw,
 680                                         ieee80211_get_vif_queues(local, sdata),
 681                                         reason, true);
 682 }
 683
 684 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 685                                struct ieee80211_sub_if_data *sdata,
 686                                enum queue_stop_reason reason)
 687 {
 688         ieee80211_wake_queues_by_reason(&local->hw,
 689                                         ieee80211_get_vif_queues(local, sdata),
 690                                         reason, true);
 691 }
 692
 693 static void __iterate_interfaces(struct ieee80211_local *local,
 694                                  u32 iter_flags,
 695                                  void (*iterator)(void *data, u8 *mac,
 696                                                   struct ieee80211_vif *vif),
 697                                  void *data)
 698 {
 699         struct ieee80211_sub_if_data *sdata;
 700         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 701
 702         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 703                 switch (sdata->vif.type) {
 704                 case NL80211_IFTYPE_MONITOR:
 705                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 706                                 continue;
 707                         break;
 708                 case NL80211_IFTYPE_AP_VLAN:
 709                         continue;
 710                 default:
 711                         break;
 712                 }
 713                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 714                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 715                         continue;
 716                 if (ieee80211_sdata_running(sdata) || !active_only)
 717                         iterator(data, sdata->vif.addr,
 718                                  &sdata->vif);
 719         }
 720
 721         sdata = rcu_dereference_check(local->monitor_sdata,
 722                                       lockdep_is_held(&local->iflist_mtx) ||
 723                                       lockdep_rtnl_is_held());
 724         if (sdata &&
 725             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 726              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 727                 iterator(data, sdata->vif.addr, &sdata->vif);
 728 }
 729
 730 void ieee80211_iterate_interfaces(
 731         struct ieee80211_hw *hw, u32 iter_flags,
 732         void (*iterator)(void *data, u8 *mac,
 733                          struct ieee80211_vif *vif),
 734         void *data)
 735 {
 736         struct ieee80211_local *local = hw_to_local(hw);
 737
 738         mutex_lock(&local->iflist_mtx);
 739         __iterate_interfaces(local, iter_flags, iterator, data);
 740         mutex_unlock(&local->iflist_mtx);
 741 }
 742 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 743
 744 void ieee80211_iterate_active_interfaces_atomic(
 745         struct ieee80211_hw *hw, u32 iter_flags,
 746         void (*iterator)(void *data, u8 *mac,
 747                          struct ieee80211_vif *vif),
 748         void *data)
 749 {
 750         struct ieee80211_local *local = hw_to_local(hw);
 751
 752         rcu_read_lock();
 753         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 754                              iterator, data);
 755         rcu_read_unlock();
 756 }
 757 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 758
 759 void ieee80211_iterate_active_interfaces_rtnl(
 760         struct ieee80211_hw *hw, u32 iter_flags,
 761         void (*iterator)(void *data, u8 *mac,
 762                          struct ieee80211_vif *vif),
 763         void *data)
 764 {
 765         struct ieee80211_local *local = hw_to_local(hw);
 766
 767         ASSERT_RTNL();
 768
 769         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 770                              iterator, data);
 771 }
 772 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 773
 774 static void __iterate_stations(struct ieee80211_local *local,
 775                                void (*iterator)(void *data,
 776                                                 struct ieee80211_sta *sta),
 777                                void *data)
 778 {
 779         struct sta_info *sta;
 780
 781         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 782                 if (!sta->uploaded)
 783                         continue;
 784
 785                 iterator(data, &sta->sta);
 786         }
 787 }
 788
 789 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 790                         void (*iterator)(void *data,
 791                                          struct ieee80211_sta *sta),
 792                         void *data)
 793 {
 794         struct ieee80211_local *local = hw_to_local(hw);
 795
 796         rcu_read_lock();
 797         __iterate_stations(local, iterator, data);
 798         rcu_read_unlock();
 799 }
 800 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 801
 802 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 803 {
 804         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 805
 806         if (!ieee80211_sdata_running(sdata) ||
 807             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 808                 return NULL;
 809         return &sdata->vif;
 810 }
 811 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 812
 813 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 814 {
 815         struct ieee80211_sub_if_data *sdata;
 816
 817         if (!vif)
 818                 return NULL;
 819
 820         sdata = vif_to_sdata(vif);
 821
 822         if (!ieee80211_sdata_running(sdata) ||
 823             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 824                 return NULL;
 825
 826         return &sdata->wdev;
 827 }
 828 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 829
 830 /*
 831  * Nothing should have been stuffed into the workqueue during
 832  * the suspend->resume cycle. Since we can't check each caller
 833  * of this function if we are already quiescing / suspended,
 834  * check here and don't WARN since this can actually happen when
 835  * the rx path (for example) is racing against __ieee80211_suspend
 836  * and suspending / quiescing was set after the rx path checked
 837  * them.
 838  */
 839 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 840 {
 841         if (local->quiescing || (local->suspended && !local->resuming)) {
 842                 pr_warn("queueing ieee80211 work while going to suspend\n");
 843                 return false;
 844         }
 845
 846         return true;
 847 }
 848
 849 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 850 {
 851         struct ieee80211_local *local = hw_to_local(hw);
 852
 853         if (!ieee80211_can_queue_work(local))
 854                 return;
 855
 856         queue_work(local->workqueue, work);
 857 }
 858 EXPORT_SYMBOL(ieee80211_queue_work);
 859
 860 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 861                                   struct delayed_work *dwork,
 862                                   unsigned long delay)
 863 {
 864         struct ieee80211_local *local = hw_to_local(hw);
 865
 866         if (!ieee80211_can_queue_work(local))
 867                 return;
 868
 869         queue_delayed_work(local->workqueue, dwork, delay);
 870 }
 871 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 872
 873 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 874                                struct ieee802_11_elems *elems,
 875                                u64 filter, u32 crc)
 876 {
 877         size_t left = len;
 878         const u8 *pos = start;
 879         bool calc_crc = filter != 0;
 880         DECLARE_BITMAP(seen_elems, 256);
 881         const u8 *ie;
 882
 883         bitmap_zero(seen_elems, 256);
 884         memset(elems, 0, sizeof(*elems));
 885         elems->ie_start = start;
 886         elems->total_len = len;
 887
 888         while (left >= 2) {
 889                 u8 id, elen;
 890                 bool elem_parse_failed;
 891
 892                 id = *pos++;
 893                 elen = *pos++;
 894                 left -= 2;
 895
 896                 if (elen > left) {
 897                         elems->parse_error = true;
 898                         break;
 899                 }
 900
 901                 switch (id) {
 902                 case WLAN_EID_SSID:
 903                 case WLAN_EID_SUPP_RATES:
 904                 case WLAN_EID_FH_PARAMS:
 905                 case WLAN_EID_DS_PARAMS:
 906                 case WLAN_EID_CF_PARAMS:
 907                 case WLAN_EID_TIM:
 908                 case WLAN_EID_IBSS_PARAMS:
 909                 case WLAN_EID_CHALLENGE:
 910                 case WLAN_EID_RSN:
 911                 case WLAN_EID_ERP_INFO:
 912                 case WLAN_EID_EXT_SUPP_RATES:
 913                 case WLAN_EID_HT_CAPABILITY:
 914                 case WLAN_EID_HT_OPERATION:
 915                 case WLAN_EID_VHT_CAPABILITY:
 916                 case WLAN_EID_VHT_OPERATION:
 917                 case WLAN_EID_MESH_ID:
 918                 case WLAN_EID_MESH_CONFIG:
 919                 case WLAN_EID_PEER_MGMT:
 920                 case WLAN_EID_PREQ:
 921                 case WLAN_EID_PREP:
 922                 case WLAN_EID_PERR:
 923                 case WLAN_EID_RANN:
 924                 case WLAN_EID_CHANNEL_SWITCH:
 925                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 926                 case WLAN_EID_COUNTRY:
 927                 case WLAN_EID_PWR_CONSTRAINT:
 928                 case WLAN_EID_TIMEOUT_INTERVAL:
 929                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 930                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 931                 case WLAN_EID_CHAN_SWITCH_PARAM:
 932                 case WLAN_EID_EXT_CAPABILITY:
 933                 case WLAN_EID_CHAN_SWITCH_TIMING:
 934                 case WLAN_EID_LINK_ID:
 935                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 936                 /*
 937                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 938                  * that if the content gets bigger it might be needed more than once
 939                  */
 940                         if (test_bit(id, seen_elems)) {
 941                                 elems->parse_error = true;
 942                                 left -= elen;
 943                                 pos += elen;
 944                                 continue;
 945                         }
 946                         break;
 947                 }
 948
 949                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 950                         crc = crc32_be(crc, pos - 2, elen + 2);
 951
 952                 elem_parse_failed = false;
 953
 954                 switch (id) {
 955                 case WLAN_EID_LINK_ID:
 956                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 957                                 elem_parse_failed = true;
 958                                 break;
 959                         }
 960                         elems->lnk_id = (void *)(pos - 2);
 961                         break;
 962                 case WLAN_EID_CHAN_SWITCH_TIMING:
 963                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 964                                 elem_parse_failed = true;
 965                                 break;
 966                         }
 967                         elems->ch_sw_timing = (void *)pos;
 968                         break;
 969                 case WLAN_EID_EXT_CAPABILITY:
 970                         elems->ext_capab = pos;
 971                         elems->ext_capab_len = elen;
 972                         break;
 973                 case WLAN_EID_SSID:
 974                         elems->ssid = pos;
 975                         elems->ssid_len = elen;
 976                         break;
 977                 case WLAN_EID_SUPP_RATES:
 978                         elems->supp_rates = pos;
 979                         elems->supp_rates_len = elen;
 980                         break;
 981                 case WLAN_EID_DS_PARAMS:
 982                         if (elen >= 1)
 983                                 elems->ds_params = pos;
 984                         else
 985                                 elem_parse_failed = true;
 986                         break;
 987                 case WLAN_EID_TIM:
 988                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 989                                 elems->tim = (void *)pos;
 990                                 elems->tim_len = elen;
 991                         } else
 992                                 elem_parse_failed = true;
 993                         break;
 994                 case WLAN_EID_CHALLENGE:
 995                         elems->challenge = pos;
 996                         elems->challenge_len = elen;
 997                         break;
 998                 case WLAN_EID_VENDOR_SPECIFIC:
 999                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1000                             pos[2] == 0xf2) {
1001                                 /* Microsoft OUI (00:50:F2) */
1002
1003                                 if (calc_crc)
1004                                         crc = crc32_be(crc, pos - 2, elen + 2);
1005
1006                                 if (elen >= 5 && pos[3] == 2) {
1007                                         /* OUI Type 2 - WMM IE */
1008                                         if (pos[4] == 0) {
1009                                                 elems->wmm_info = pos;
1010                                                 elems->wmm_info_len = elen;
1011                                         } else if (pos[4] == 1) {
1012                                                 elems->wmm_param = pos;
1013                                                 elems->wmm_param_len = elen;
1014                                         }
1015                                 }
1016                         }
1017                         break;
1018                 case WLAN_EID_RSN:
1019                         elems->rsn = pos;
1020                         elems->rsn_len = elen;
1021                         break;
1022                 case WLAN_EID_ERP_INFO:
1023                         if (elen >= 1)
1024                                 elems->erp_info = pos;
1025                         else
1026                                 elem_parse_failed = true;
1027                         break;
1028                 case WLAN_EID_EXT_SUPP_RATES:
1029                         elems->ext_supp_rates = pos;
1030                         elems->ext_supp_rates_len = elen;
1031                         break;
1032                 case WLAN_EID_HT_CAPABILITY:
1033                         if (elen >= sizeof(struct ieee80211_ht_cap))
1034                                 elems->ht_cap_elem = (void *)pos;
1035                         else
1036                                 elem_parse_failed = true;
1037                         break;
1038                 case WLAN_EID_HT_OPERATION:
1039                         if (elen >= sizeof(struct ieee80211_ht_operation))
1040                                 elems->ht_operation = (void *)pos;
1041                         else
1042                                 elem_parse_failed = true;
1043                         break;
1044                 case WLAN_EID_VHT_CAPABILITY:
1045                         if (elen >= sizeof(struct ieee80211_vht_cap))
1046                                 elems->vht_cap_elem = (void *)pos;
1047                         else
1048                                 elem_parse_failed = true;
1049                         break;
1050                 case WLAN_EID_VHT_OPERATION:
1051                         if (elen >= sizeof(struct ieee80211_vht_operation))
1052                                 elems->vht_operation = (void *)pos;
1053                         else
1054                                 elem_parse_failed = true;
1055                         break;
1056                 case WLAN_EID_OPMODE_NOTIF:
1057                         if (elen > 0)
1058                                 elems->opmode_notif = pos;
1059                         else
1060                                 elem_parse_failed = true;
1061                         break;
1062                 case WLAN_EID_MESH_ID:
1063                         elems->mesh_id = pos;
1064                         elems->mesh_id_len = elen;
1065                         break;
1066                 case WLAN_EID_MESH_CONFIG:
1067                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1068                                 elems->mesh_config = (void *)pos;
1069                         else
1070                                 elem_parse_failed = true;
1071                         break;
1072                 case WLAN_EID_PEER_MGMT:
1073                         elems->peering = pos;
1074                         elems->peering_len = elen;
1075                         break;
1076                 case WLAN_EID_MESH_AWAKE_WINDOW:
1077                         if (elen >= 2)
1078                                 elems->awake_window = (void *)pos;
1079                         break;
1080                 case WLAN_EID_PREQ:
1081                         elems->preq = pos;
1082                         elems->preq_len = elen;
1083                         break;
1084                 case WLAN_EID_PREP:
1085                         elems->prep = pos;
1086                         elems->prep_len = elen;
1087                         break;
1088                 case WLAN_EID_PERR:
1089                         elems->perr = pos;
1090                         elems->perr_len = elen;
1091                         break;
1092                 case WLAN_EID_RANN:
1093                         if (elen >= sizeof(struct ieee80211_rann_ie))
1094                                 elems->rann = (void *)pos;
1095                         else
1096                                 elem_parse_failed = true;
1097                         break;
1098                 case WLAN_EID_CHANNEL_SWITCH:
1099                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1100                                 elem_parse_failed = true;
1101                                 break;
1102                         }
1103                         elems->ch_switch_ie = (void *)pos;
1104                         break;
1105                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1106                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1107                                 elem_parse_failed = true;
1108                                 break;
1109                         }
1110                         elems->ext_chansw_ie = (void *)pos;
1111                         break;
1112                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1113                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1114                                 elem_parse_failed = true;
1115                                 break;
1116                         }
1117                         elems->sec_chan_offs = (void *)pos;
1118                         break;
1119                 case WLAN_EID_CHAN_SWITCH_PARAM:
1120                         if (elen !=
1121                             sizeof(*elems->mesh_chansw_params_ie)) {
1122                                 elem_parse_failed = true;
1123                                 break;
1124                         }
1125                         elems->mesh_chansw_params_ie = (void *)pos;
1126                         break;
1127                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1128                         if (!action ||
1129                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1130                                 elem_parse_failed = true;
1131                                 break;
1132                         }
1133                         elems->wide_bw_chansw_ie = (void *)pos;
1134                         break;
1135                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1136                         if (action) {
1137                                 elem_parse_failed = true;
1138                                 break;
1139                         }
1140                         /*
1141                          * This is a bit tricky, but as we only care about
1142                          * the wide bandwidth channel switch element, so
1143                          * just parse it out manually.
1144                          */
1145                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1146                                               pos, elen);
1147                         if (ie) {
1148                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1149                                         elems->wide_bw_chansw_ie =
1150                                                 (void *)(ie + 2);
1151                                 else
1152                                         elem_parse_failed = true;
1153                         }
1154                         break;
1155                 case WLAN_EID_COUNTRY:
1156                         elems->country_elem = pos;
1157                         elems->country_elem_len = elen;
1158                         break;
1159                 case WLAN_EID_PWR_CONSTRAINT:
1160                         if (elen != 1) {
1161                                 elem_parse_failed = true;
1162                                 break;
1163                         }
1164                         elems->pwr_constr_elem = pos;
1165                         break;
1166                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1167                         /* Lots of different options exist, but we only care
1168                          * about the Dynamic Transmit Power Control element.
1169                          * First check for the Cisco OUI, then for the DTPC
1170                          * tag (0x00).
1171                          */
1172                         if (elen < 4) {
1173                                 elem_parse_failed = true;
1174                                 break;
1175                         }
1176
1177                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1178                             pos[2] != 0x96 || pos[3] != 0x00)
1179                                 break;
1180
1181                         if (elen != 6) {
1182                                 elem_parse_failed = true;
1183                                 break;
1184                         }
1185
1186                         if (calc_crc)
1187                                 crc = crc32_be(crc, pos - 2, elen + 2);
1188
1189                         elems->cisco_dtpc_elem = pos;
1190                         break;
1191                 case WLAN_EID_TIMEOUT_INTERVAL:
1192                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1193                                 elems->timeout_int = (void *)pos;
1194                         else
1195                                 elem_parse_failed = true;
1196                         break;
1197                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1198                         if (elen >= sizeof(*elems->max_idle_period_ie))
1199                                 elems->max_idle_period_ie = (void *)pos;
1200                         break;
1201                 case WLAN_EID_EXTENSION:
1202                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1203                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1204                                 elems->mu_edca_param_set = (void *)&pos[1];
1205                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1206                                 elems->he_cap = (void *)&pos[1];
1207                                 elems->he_cap_len = elen - 1;
1208                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1209                                    elen >= sizeof(*elems->he_operation) &&
1210                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1211                                 elems->he_operation = (void *)&pos[1];
1212                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1213                                 elems->uora_element = (void *)&pos[1];
1214                         }
1215                         break;
1216                 default:
1217                         break;
1218                 }
1219
1220                 if (elem_parse_failed)
1221                         elems->parse_error = true;
1222                 else
1223                         __set_bit(id, seen_elems);
1224
1225                 left -= elen;
1226                 pos += elen;
1227         }
1228
1229         if (left != 0)
1230                 elems->parse_error = true;
1231
1232         return crc;
1233 }
1234
1235 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1236                                            struct ieee80211_tx_queue_params
1237                                            *qparam, int ac)
1238 {
1239         struct ieee80211_chanctx_conf *chanctx_conf;
1240         const struct ieee80211_reg_rule *rrule;
1241         const struct ieee80211_wmm_ac *wmm_ac;
1242         u16 center_freq = 0;
1243
1244         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1245             sdata->vif.type != NL80211_IFTYPE_STATION)
1246                 return;
1247
1248         rcu_read_lock();
1249         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1250         if (chanctx_conf)
1251                 center_freq = chanctx_conf->def.chan->center_freq;
1252
1253         if (!center_freq) {
1254                 rcu_read_unlock();
1255                 return;
1256         }
1257
1258         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1259
1260         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1261                 rcu_read_unlock();
1262                 return;
1263         }
1264
1265         if (sdata->vif.type == NL80211_IFTYPE_AP)
1266                 wmm_ac = &rrule->wmm_rule.ap[ac];
1267         else
1268                 wmm_ac = &rrule->wmm_rule.client[ac];
1269         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1270         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1271         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1272         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1273         rcu_read_unlock();
1274 }
1275
1276 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1277                                bool bss_notify, bool enable_qos)
1278 {
1279         struct ieee80211_local *local = sdata->local;
1280         struct ieee80211_tx_queue_params qparam;
1281         struct ieee80211_chanctx_conf *chanctx_conf;
1282         int ac;
1283         bool use_11b;
1284         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1285         int aCWmin, aCWmax;
1286
1287         if (!local->ops->conf_tx)
1288                 return;
1289
1290         if (local->hw.queues < IEEE80211_NUM_ACS)
1291                 return;
1292
1293         memset(&qparam, 0, sizeof(qparam));
1294
1295         rcu_read_lock();
1296         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1297         use_11b = (chanctx_conf &&
1298                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1299                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1300         rcu_read_unlock();
1301
1302         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1303
1304         /* Set defaults according to 802.11-2007 Table 7-37 */
1305         aCWmax = 1023;
1306         if (use_11b)
1307                 aCWmin = 31;
1308         else
1309                 aCWmin = 15;
1310
1311         /* Confiure old 802.11b/g medium access rules. */
1312         qparam.cw_max = aCWmax;
1313         qparam.cw_min = aCWmin;
1314         qparam.txop = 0;
1315         qparam.aifs = 2;
1316
1317         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1318                 /* Update if QoS is enabled. */
1319                 if (enable_qos) {
1320                         switch (ac) {
1321                         case IEEE80211_AC_BK:
1322                                 qparam.cw_max = aCWmax;
1323                                 qparam.cw_min = aCWmin;
1324                                 qparam.txop = 0;
1325                                 if (is_ocb)
1326                                         qparam.aifs = 9;
1327                                 else
1328                                         qparam.aifs = 7;
1329                                 break;
1330                         /* never happens but let's not leave undefined */
1331                         default:
1332                         case IEEE80211_AC_BE:
1333                                 qparam.cw_max = aCWmax;
1334                                 qparam.cw_min = aCWmin;
1335                                 qparam.txop = 0;
1336                                 if (is_ocb)
1337                                         qparam.aifs = 6;
1338                                 else
1339                                         qparam.aifs = 3;
1340                                 break;
1341                         case IEEE80211_AC_VI:
1342                                 qparam.cw_max = aCWmin;
1343                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1344                                 if (is_ocb)
1345                                         qparam.txop = 0;
1346                                 else if (use_11b)
1347                                         qparam.txop = 6016/32;
1348                                 else
1349                                         qparam.txop = 3008/32;
1350
1351                                 if (is_ocb)
1352                                         qparam.aifs = 3;
1353                                 else
1354                                         qparam.aifs = 2;
1355                                 break;
1356                         case IEEE80211_AC_VO:
1357                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1358                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1359                                 if (is_ocb)
1360                                         qparam.txop = 0;
1361                                 else if (use_11b)
1362                                         qparam.txop = 3264/32;
1363                                 else
1364                                         qparam.txop = 1504/32;
1365                                 qparam.aifs = 2;
1366                                 break;
1367                         }
1368                 }
1369                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1370
1371                 qparam.uapsd = false;
1372
1373                 sdata->tx_conf[ac] = qparam;
1374                 drv_conf_tx(local, sdata, ac, &qparam);
1375         }
1376
1377         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1378             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1379             sdata->vif.type != NL80211_IFTYPE_NAN) {
1380                 sdata->vif.bss_conf.qos = enable_qos;
1381                 if (bss_notify)
1382                         ieee80211_bss_info_change_notify(sdata,
1383                                                          BSS_CHANGED_QOS);
1384         }
1385 }
1386
1387 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1388                          u16 transaction, u16 auth_alg, u16 status,
1389                          const u8 *extra, size_t extra_len, const u8 *da,
1390                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1391                          u32 tx_flags)
1392 {
1393         struct ieee80211_local *local = sdata->local;
1394         struct sk_buff *skb;
1395         struct ieee80211_mgmt *mgmt;
1396         int err;
1397
1398         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1399         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1400                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1401         if (!skb)
1402                 return;
1403
1404         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1405
1406         mgmt = skb_put_zero(skb, 24 + 6);
1407         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1408                                           IEEE80211_STYPE_AUTH);
1409         memcpy(mgmt->da, da, ETH_ALEN);
1410         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1411         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1412         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1413         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1414         mgmt->u.auth.status_code = cpu_to_le16(status);
1415         if (extra)
1416                 skb_put_data(skb, extra, extra_len);
1417
1418         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1419                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1420                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1421                 WARN_ON(err);
1422         }
1423
1424         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1425                                         tx_flags;
1426         ieee80211_tx_skb(sdata, skb);
1427 }
1428
1429 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1430                                     const u8 *bssid, u16 stype, u16 reason,
1431                                     bool send_frame, u8 *frame_buf)
1432 {
1433         struct ieee80211_local *local = sdata->local;
1434         struct sk_buff *skb;
1435         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1436
1437         /* build frame */
1438         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1439         mgmt->duration = 0; /* initialize only */
1440         mgmt->seq_ctrl = 0; /* initialize only */
1441         memcpy(mgmt->da, bssid, ETH_ALEN);
1442         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1443         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1444         /* u.deauth.reason_code == u.disassoc.reason_code */
1445         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1446
1447         if (send_frame) {
1448                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1449                                     IEEE80211_DEAUTH_FRAME_LEN);
1450                 if (!skb)
1451                         return;
1452
1453                 skb_reserve(skb, local->hw.extra_tx_headroom);
1454
1455                 /* copy in frame */
1456                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1457
1458                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1459                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1460                         IEEE80211_SKB_CB(skb)->flags |=
1461                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1462
1463                 ieee80211_tx_skb(sdata, skb);
1464         }
1465 }
1466
1467 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1468                                          u8 *buffer, size_t buffer_len,
1469                                          const u8 *ie, size_t ie_len,
1470                                          enum nl80211_band band,
1471                                          u32 rate_mask,
1472                                          struct cfg80211_chan_def *chandef,
1473                                          size_t *offset, u32 flags)
1474 {
1475         struct ieee80211_supported_band *sband;
1476         const struct ieee80211_sta_he_cap *he_cap;
1477         u8 *pos = buffer, *end = buffer + buffer_len;
1478         size_t noffset;
1479         int supp_rates_len, i;
1480         u8 rates[32];
1481         int num_rates;
1482         int ext_rates_len;
1483         int shift;
1484         u32 rate_flags;
1485         bool have_80mhz = false;
1486
1487         *offset = 0;
1488
1489         sband = local->hw.wiphy->bands[band];
1490         if (WARN_ON_ONCE(!sband))
1491                 return 0;
1492
1493         rate_flags = ieee80211_chandef_rate_flags(chandef);
1494         shift = ieee80211_chandef_get_shift(chandef);
1495
1496         num_rates = 0;
1497         for (i = 0; i < sband->n_bitrates; i++) {
1498                 if ((BIT(i) & rate_mask) == 0)
1499                         continue; /* skip rate */
1500                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1501                         continue;
1502
1503                 rates[num_rates++] =
1504                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1505                                           (1 << shift) * 5);
1506         }
1507
1508         supp_rates_len = min_t(int, num_rates, 8);
1509
1510         if (end - pos < 2 + supp_rates_len)
1511                 goto out_err;
1512         *pos++ = WLAN_EID_SUPP_RATES;
1513         *pos++ = supp_rates_len;
1514         memcpy(pos, rates, supp_rates_len);
1515         pos += supp_rates_len;
1516
1517         /* insert "request information" if in custom IEs */
1518         if (ie && ie_len) {
1519                 static const u8 before_extrates[] = {
1520                         WLAN_EID_SSID,
1521                         WLAN_EID_SUPP_RATES,
1522                         WLAN_EID_REQUEST,
1523                 };
1524                 noffset = ieee80211_ie_split(ie, ie_len,
1525                                              before_extrates,
1526                                              ARRAY_SIZE(before_extrates),
1527                                              *offset);
1528                 if (end - pos < noffset - *offset)
1529                         goto out_err;
1530                 memcpy(pos, ie + *offset, noffset - *offset);
1531                 pos += noffset - *offset;
1532                 *offset = noffset;
1533         }
1534
1535         ext_rates_len = num_rates - supp_rates_len;
1536         if (ext_rates_len > 0) {
1537                 if (end - pos < 2 + ext_rates_len)
1538                         goto out_err;
1539                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1540                 *pos++ = ext_rates_len;
1541                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1542                 pos += ext_rates_len;
1543         }
1544
1545         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1546                 if (end - pos < 3)
1547                         goto out_err;
1548                 *pos++ = WLAN_EID_DS_PARAMS;
1549                 *pos++ = 1;
1550                 *pos++ = ieee80211_frequency_to_channel(
1551                                 chandef->chan->center_freq);
1552         }
1553
1554         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1555                 goto done;
1556
1557         /* insert custom IEs that go before HT */
1558         if (ie && ie_len) {
1559                 static const u8 before_ht[] = {
1560                         /*
1561                          * no need to list the ones split off already
1562                          * (or generated here)
1563                          */
1564                         WLAN_EID_DS_PARAMS,
1565                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1566                 };
1567                 noffset = ieee80211_ie_split(ie, ie_len,
1568                                              before_ht, ARRAY_SIZE(before_ht),
1569                                              *offset);
1570                 if (end - pos < noffset - *offset)
1571                         goto out_err;
1572                 memcpy(pos, ie + *offset, noffset - *offset);
1573                 pos += noffset - *offset;
1574                 *offset = noffset;
1575         }
1576
1577         if (sband->ht_cap.ht_supported) {
1578                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1579                         goto out_err;
1580                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1581                                                 sband->ht_cap.cap);
1582         }
1583
1584         /* insert custom IEs that go before VHT */
1585         if (ie && ie_len) {
1586                 static const u8 before_vht[] = {
1587                         /*
1588                          * no need to list the ones split off already
1589                          * (or generated here)
1590                          */
1591                         WLAN_EID_BSS_COEX_2040,
1592                         WLAN_EID_EXT_CAPABILITY,
1593                         WLAN_EID_SSID_LIST,
1594                         WLAN_EID_CHANNEL_USAGE,
1595                         WLAN_EID_INTERWORKING,
1596                         WLAN_EID_MESH_ID,
1597                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1598                 };
1599                 noffset = ieee80211_ie_split(ie, ie_len,
1600                                              before_vht, ARRAY_SIZE(before_vht),
1601                                              *offset);
1602                 if (end - pos < noffset - *offset)
1603                         goto out_err;
1604                 memcpy(pos, ie + *offset, noffset - *offset);
1605                 pos += noffset - *offset;
1606                 *offset = noffset;
1607         }
1608
1609         /* Check if any channel in this sband supports at least 80 MHz */
1610         for (i = 0; i < sband->n_channels; i++) {
1611                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1612                                                 IEEE80211_CHAN_NO_80MHZ))
1613                         continue;
1614
1615                 have_80mhz = true;
1616                 break;
1617         }
1618
1619         if (sband->vht_cap.vht_supported && have_80mhz) {
1620                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1621                         goto out_err;
1622                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1623                                                  sband->vht_cap.cap);
1624         }
1625
1626         /* insert custom IEs that go before HE */
1627         if (ie && ie_len) {
1628                 static const u8 before_he[] = {
1629                         /*
1630                          * no need to list the ones split off before VHT
1631                          * or generated here
1632                          */
1633                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1634                         WLAN_EID_AP_CSN,
1635                         /* TODO: add 11ah/11aj/11ak elements */
1636                 };
1637                 noffset = ieee80211_ie_split(ie, ie_len,
1638                                              before_he, ARRAY_SIZE(before_he),
1639                                              *offset);
1640                 if (end - pos < noffset - *offset)
1641                         goto out_err;
1642                 memcpy(pos, ie + *offset, noffset - *offset);
1643                 pos += noffset - *offset;
1644                 *offset = noffset;
1645         }
1646
1647         he_cap = ieee80211_get_he_sta_cap(sband);
1648         if (he_cap) {
1649                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1650                 if (!pos)
1651                         goto out_err;
1652         }
1653
1654         /*
1655          * If adding more here, adjust code in main.c
1656          * that calculates local->scan_ies_len.
1657          */
1658
1659         return pos - buffer;
1660  out_err:
1661         WARN_ONCE(1, "not enough space for preq IEs\n");
1662  done:
1663         return pos - buffer;
1664 }
1665
1666 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1667                              size_t buffer_len,
1668                              struct ieee80211_scan_ies *ie_desc,
1669                              const u8 *ie, size_t ie_len,
1670                              u8 bands_used, u32 *rate_masks,
1671                              struct cfg80211_chan_def *chandef,
1672                              u32 flags)
1673 {
1674         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1675         int i;
1676
1677         memset(ie_desc, 0, sizeof(*ie_desc));
1678
1679         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1680                 if (bands_used & BIT(i)) {
1681                         pos += ieee80211_build_preq_ies_band(local,
1682                                                              buffer + pos,
1683                                                              buffer_len - pos,
1684                                                              ie, ie_len, i,
1685                                                              rate_masks[i],
1686                                                              chandef,
1687                                                              &custom_ie_offset,
1688                                                              flags);
1689                         ie_desc->ies[i] = buffer + old_pos;
1690                         ie_desc->len[i] = pos - old_pos;
1691                         old_pos = pos;
1692                 }
1693         }
1694
1695         /* add any remaining custom IEs */
1696         if (ie && ie_len) {
1697                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1698                               "not enough space for preq custom IEs\n"))
1699                         return pos;
1700                 memcpy(buffer + pos, ie + custom_ie_offset,
1701                        ie_len - custom_ie_offset);
1702                 ie_desc->common_ies = buffer + pos;
1703                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1704                 pos += ie_len - custom_ie_offset;
1705         }
1706
1707         return pos;
1708 };
1709
1710 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1711                                           const u8 *src, const u8 *dst,
1712                                           u32 ratemask,
1713                                           struct ieee80211_channel *chan,
1714                                           const u8 *ssid, size_t ssid_len,
1715                                           const u8 *ie, size_t ie_len,
1716                                           u32 flags)
1717 {
1718         struct ieee80211_local *local = sdata->local;
1719         struct cfg80211_chan_def chandef;
1720         struct sk_buff *skb;
1721         struct ieee80211_mgmt *mgmt;
1722         int ies_len;
1723         u32 rate_masks[NUM_NL80211_BANDS] = {};
1724         struct ieee80211_scan_ies dummy_ie_desc;
1725
1726         /*
1727          * Do not send DS Channel parameter for directed probe requests
1728          * in order to maximize the chance that we get a response.  Some
1729          * badly-behaved APs don't respond when this parameter is included.
1730          */
1731         chandef.width = sdata->vif.bss_conf.chandef.width;
1732         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1733                 chandef.chan = NULL;
1734         else
1735                 chandef.chan = chan;
1736
1737         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1738                                      100 + ie_len);
1739         if (!skb)
1740                 return NULL;
1741
1742         rate_masks[chan->band] = ratemask;
1743         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1744                                            skb_tailroom(skb), &dummy_ie_desc,
1745                                            ie, ie_len, BIT(chan->band),
1746                                            rate_masks, &chandef, flags);
1747         skb_put(skb, ies_len);
1748
1749         if (dst) {
1750                 mgmt = (struct ieee80211_mgmt *) skb->data;
1751                 memcpy(mgmt->da, dst, ETH_ALEN);
1752                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1753         }
1754
1755         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1756
1757         return skb;
1758 }
1759
1760 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1761                             struct ieee802_11_elems *elems,
1762                             enum nl80211_band band, u32 *basic_rates)
1763 {
1764         struct ieee80211_supported_band *sband;
1765         size_t num_rates;
1766         u32 supp_rates, rate_flags;
1767         int i, j, shift;
1768
1769         sband = sdata->local->hw.wiphy->bands[band];
1770         if (WARN_ON(!sband))
1771                 return 1;
1772
1773         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1774         shift = ieee80211_vif_get_shift(&sdata->vif);
1775
1776         num_rates = sband->n_bitrates;
1777         supp_rates = 0;
1778         for (i = 0; i < elems->supp_rates_len +
1779                      elems->ext_supp_rates_len; i++) {
1780                 u8 rate = 0;
1781                 int own_rate;
1782                 bool is_basic;
1783                 if (i < elems->supp_rates_len)
1784                         rate = elems->supp_rates[i];
1785                 else if (elems->ext_supp_rates)
1786                         rate = elems->ext_supp_rates
1787                                 [i - elems->supp_rates_len];
1788                 own_rate = 5 * (rate & 0x7f);
1789                 is_basic = !!(rate & 0x80);
1790
1791                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1792                         continue;
1793
1794                 for (j = 0; j < num_rates; j++) {
1795                         int brate;
1796                         if ((rate_flags & sband->bitrates[j].flags)
1797                             != rate_flags)
1798                                 continue;
1799
1800                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1801                                              1 << shift);
1802
1803                         if (brate == own_rate) {
1804                                 supp_rates |= BIT(j);
1805                                 if (basic_rates && is_basic)
1806                                         *basic_rates |= BIT(j);
1807                         }
1808                 }
1809         }
1810         return supp_rates;
1811 }
1812
1813 void ieee80211_stop_device(struct ieee80211_local *local)
1814 {
1815         ieee80211_led_radio(local, false);
1816         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1817
1818         cancel_work_sync(&local->reconfig_filter);
1819
1820         flush_workqueue(local->workqueue);
1821         drv_stop(local);
1822 }
1823
1824 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1825                                            bool aborted)
1826 {
1827         /* It's possible that we don't handle the scan completion in
1828          * time during suspend, so if it's still marked as completed
1829          * here, queue the work and flush it to clean things up.
1830          * Instead of calling the worker function directly here, we
1831          * really queue it to avoid potential races with other flows
1832          * scheduling the same work.
1833          */
1834         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1835                 /* If coming from reconfiguration failure, abort the scan so
1836                  * we don't attempt to continue a partial HW scan - which is
1837                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1838                  * completed scan, and a 5 GHz portion is still pending.
1839                  */
1840                 if (aborted)
1841                         set_bit(SCAN_ABORTED, &local->scanning);
1842                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1843                 flush_delayed_work(&local->scan_work);
1844         }
1845 }
1846
1847 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1848 {
1849         struct ieee80211_sub_if_data *sdata;
1850         struct ieee80211_chanctx *ctx;
1851
1852         /*
1853          * We get here if during resume the device can't be restarted properly.
1854          * We might also get here if this happens during HW reset, which is a
1855          * slightly different situation and we need to drop all connections in
1856          * the latter case.
1857          *
1858          * Ask cfg80211 to turn off all interfaces, this will result in more
1859          * warnings but at least we'll then get into a clean stopped state.
1860          */
1861
1862         local->resuming = false;
1863         local->suspended = false;
1864         local->in_reconfig = false;
1865
1866         ieee80211_flush_completed_scan(local, true);
1867
1868         /* scheduled scan clearly can't be running any more, but tell
1869          * cfg80211 and clear local state
1870          */
1871         ieee80211_sched_scan_end(local);
1872
1873         list_for_each_entry(sdata, &local->interfaces, list)
1874                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1875
1876         /* Mark channel contexts as not being in the driver any more to avoid
1877          * removing them from the driver during the shutdown process...
1878          */
1879         mutex_lock(&local->chanctx_mtx);
1880         list_for_each_entry(ctx, &local->chanctx_list, list)
1881                 ctx->driver_present = false;
1882         mutex_unlock(&local->chanctx_mtx);
1883
1884         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1885 }
1886
1887 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1888                                      struct ieee80211_sub_if_data *sdata)
1889 {
1890         struct ieee80211_chanctx_conf *conf;
1891         struct ieee80211_chanctx *ctx;
1892
1893         if (!local->use_chanctx)
1894                 return;
1895
1896         mutex_lock(&local->chanctx_mtx);
1897         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1898                                          lockdep_is_held(&local->chanctx_mtx));
1899         if (conf) {
1900                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1901                 drv_assign_vif_chanctx(local, sdata, ctx);
1902         }
1903         mutex_unlock(&local->chanctx_mtx);
1904 }
1905
1906 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1907 {
1908         struct ieee80211_local *local = sdata->local;
1909         struct sta_info *sta;
1910
1911         /* add STAs back */
1912         mutex_lock(&local->sta_mtx);
1913         list_for_each_entry(sta, &local->sta_list, list) {
1914                 enum ieee80211_sta_state state;
1915
1916                 if (!sta->uploaded || sta->sdata != sdata)
1917                         continue;
1918
1919                 for (state = IEEE80211_STA_NOTEXIST;
1920                      state < sta->sta_state; state++)
1921                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1922                                               state + 1));
1923         }
1924         mutex_unlock(&local->sta_mtx);
1925 }
1926
1927 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1928 {
1929         struct cfg80211_nan_func *func, **funcs;
1930         int res, id, i = 0;
1931
1932         res = drv_start_nan(sdata->local, sdata,
1933                             &sdata->u.nan.conf);
1934         if (WARN_ON(res))
1935                 return res;
1936
1937         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1938                         sizeof(*funcs),
1939                         GFP_KERNEL);
1940         if (!funcs)
1941                 return -ENOMEM;
1942
1943         /* Add all the functions:
1944          * This is a little bit ugly. We need to call a potentially sleeping
1945          * callback for each NAN function, so we can't hold the spinlock.
1946          */
1947         spin_lock_bh(&sdata->u.nan.func_lock);
1948
1949         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1950                 funcs[i++] = func;
1951
1952         spin_unlock_bh(&sdata->u.nan.func_lock);
1953
1954         for (i = 0; funcs[i]; i++) {
1955                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1956                 if (WARN_ON(res))
1957                         ieee80211_nan_func_terminated(&sdata->vif,
1958                                                       funcs[i]->instance_id,
1959                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1960                                                       GFP_KERNEL);
1961         }
1962
1963         kfree(funcs);
1964
1965         return 0;
1966 }
1967
1968 int ieee80211_reconfig(struct ieee80211_local *local)
1969 {
1970         struct ieee80211_hw *hw = &local->hw;
1971         struct ieee80211_sub_if_data *sdata;
1972         struct ieee80211_chanctx *ctx;
1973         struct sta_info *sta;
1974         int res, i;
1975         bool reconfig_due_to_wowlan = false;
1976         struct ieee80211_sub_if_data *sched_scan_sdata;
1977         struct cfg80211_sched_scan_request *sched_scan_req;
1978         bool sched_scan_stopped = false;
1979         bool suspended = local->suspended;
1980
1981         /* nothing to do if HW shouldn't run */
1982         if (!local->open_count)
1983                 goto wake_up;
1984
1985 #ifdef CONFIG_PM
1986         if (suspended)
1987                 local->resuming = true;
1988
1989         if (local->wowlan) {
1990                 /*
1991                  * In the wowlan case, both mac80211 and the device
1992                  * are functional when the resume op is called, so
1993                  * clear local->suspended so the device could operate
1994                  * normally (e.g. pass rx frames).
1995                  */
1996                 local->suspended = false;
1997                 res = drv_resume(local);
1998                 local->wowlan = false;
1999                 if (res < 0) {
2000                         local->resuming = false;
2001                         return res;
2002                 }
2003                 if (res == 0)
2004                         goto wake_up;
2005                 WARN_ON(res > 1);
2006                 /*
2007                  * res is 1, which means the driver requested
2008                  * to go through a regular reset on wakeup.
2009                  * restore local->suspended in this case.
2010                  */
2011                 reconfig_due_to_wowlan = true;
2012                 local->suspended = true;
2013         }
2014 #endif
2015
2016         /*
2017          * In case of hw_restart during suspend (without wowlan),
2018          * cancel restart work, as we are reconfiguring the device
2019          * anyway.
2020          * Note that restart_work is scheduled on a frozen workqueue,
2021          * so we can't deadlock in this case.
2022          */
2023         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2024                 cancel_work_sync(&local->restart_work);
2025
2026         local->started = false;
2027
2028         /*
2029          * Upon resume hardware can sometimes be goofy due to
2030          * various platform / driver / bus issues, so restarting
2031          * the device may at times not work immediately. Propagate
2032          * the error.
2033          */
2034         res = drv_start(local);
2035         if (res) {
2036                 if (suspended)
2037                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2038                 else
2039                         WARN(1, "Hardware became unavailable during restart.\n");
2040                 ieee80211_handle_reconfig_failure(local);
2041                 return res;
2042         }
2043
2044         /* setup fragmentation threshold */
2045         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2046
2047         /* setup RTS threshold */
2048         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2049
2050         /* reset coverage class */
2051         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2052
2053         ieee80211_led_radio(local, true);
2054         ieee80211_mod_tpt_led_trig(local,
2055                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2056
2057         /* add interfaces */
2058         sdata = rtnl_dereference(local->monitor_sdata);
2059         if (sdata) {
2060                 /* in HW restart it exists already */
2061                 WARN_ON(local->resuming);
2062                 res = drv_add_interface(local, sdata);
2063                 if (WARN_ON(res)) {
2064                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2065                         synchronize_net();
2066                         kfree(sdata);
2067                 }
2068         }
2069
2070         list_for_each_entry(sdata, &local->interfaces, list) {
2071                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2072                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2073                     ieee80211_sdata_running(sdata)) {
2074                         res = drv_add_interface(local, sdata);
2075                         if (WARN_ON(res))
2076                                 break;
2077                 }
2078         }
2079
2080         /* If adding any of the interfaces failed above, roll back and
2081          * report failure.
2082          */
2083         if (res) {
2084                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2085                                                      list)
2086                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2087                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2088                             ieee80211_sdata_running(sdata))
2089                                 drv_remove_interface(local, sdata);
2090                 ieee80211_handle_reconfig_failure(local);
2091                 return res;
2092         }
2093
2094         /* add channel contexts */
2095         if (local->use_chanctx) {
2096                 mutex_lock(&local->chanctx_mtx);
2097                 list_for_each_entry(ctx, &local->chanctx_list, list)
2098                         if (ctx->replace_state !=
2099                             IEEE80211_CHANCTX_REPLACES_OTHER)
2100                                 WARN_ON(drv_add_chanctx(local, ctx));
2101                 mutex_unlock(&local->chanctx_mtx);
2102
2103                 sdata = rtnl_dereference(local->monitor_sdata);
2104                 if (sdata && ieee80211_sdata_running(sdata))
2105                         ieee80211_assign_chanctx(local, sdata);
2106         }
2107
2108         /* reconfigure hardware */
2109         ieee80211_hw_config(local, ~0);
2110
2111         ieee80211_configure_filter(local);
2112
2113         /* Finally also reconfigure all the BSS information */
2114         list_for_each_entry(sdata, &local->interfaces, list) {
2115                 u32 changed;
2116
2117                 if (!ieee80211_sdata_running(sdata))
2118                         continue;
2119
2120                 ieee80211_assign_chanctx(local, sdata);
2121
2122                 switch (sdata->vif.type) {
2123                 case NL80211_IFTYPE_AP_VLAN:
2124                 case NL80211_IFTYPE_MONITOR:
2125                         break;
2126                 default:
2127                         ieee80211_reconfig_stations(sdata);
2128                         /* fall through */
2129                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2130                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2131                                 drv_conf_tx(local, sdata, i,
2132                                             &sdata->tx_conf[i]);
2133                         break;
2134                 }
2135
2136                 /* common change flags for all interface types */
2137                 changed = BSS_CHANGED_ERP_CTS_PROT |
2138                           BSS_CHANGED_ERP_PREAMBLE |
2139                           BSS_CHANGED_ERP_SLOT |
2140                           BSS_CHANGED_HT |
2141                           BSS_CHANGED_BASIC_RATES |
2142                           BSS_CHANGED_BEACON_INT |
2143                           BSS_CHANGED_BSSID |
2144                           BSS_CHANGED_CQM |
2145                           BSS_CHANGED_QOS |
2146                           BSS_CHANGED_IDLE |
2147                           BSS_CHANGED_TXPOWER |
2148                           BSS_CHANGED_MCAST_RATE;
2149
2150                 if (sdata->vif.mu_mimo_owner)
2151                         changed |= BSS_CHANGED_MU_GROUPS;
2152
2153                 switch (sdata->vif.type) {
2154                 case NL80211_IFTYPE_STATION:
2155                         changed |= BSS_CHANGED_ASSOC |
2156                                    BSS_CHANGED_ARP_FILTER |
2157                                    BSS_CHANGED_PS;
2158
2159                         /* Re-send beacon info report to the driver */
2160                         if (sdata->u.mgd.have_beacon)
2161                                 changed |= BSS_CHANGED_BEACON_INFO;
2162
2163                         if (sdata->vif.bss_conf.max_idle_period ||
2164                             sdata->vif.bss_conf.protected_keep_alive)
2165                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2166
2167                         sdata_lock(sdata);
2168                         ieee80211_bss_info_change_notify(sdata, changed);
2169                         sdata_unlock(sdata);
2170                         break;
2171                 case NL80211_IFTYPE_OCB:
2172                         changed |= BSS_CHANGED_OCB;
2173                         ieee80211_bss_info_change_notify(sdata, changed);
2174                         break;
2175                 case NL80211_IFTYPE_ADHOC:
2176                         changed |= BSS_CHANGED_IBSS;
2177                         /* fall through */
2178                 case NL80211_IFTYPE_AP:
2179                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2180
2181                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2182                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2183                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2184                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2185
2186                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2187                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2188
2189                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2190                                         drv_start_ap(local, sdata);
2191                         }
2192
2193                         /* fall through */
2194                 case NL80211_IFTYPE_MESH_POINT:
2195                         if (sdata->vif.bss_conf.enable_beacon) {
2196                                 changed |= BSS_CHANGED_BEACON |
2197                                            BSS_CHANGED_BEACON_ENABLED;
2198                                 ieee80211_bss_info_change_notify(sdata, changed);
2199                         }
2200                         break;
2201                 case NL80211_IFTYPE_NAN:
2202                         res = ieee80211_reconfig_nan(sdata);
2203                         if (res < 0) {
2204                                 ieee80211_handle_reconfig_failure(local);
2205                                 return res;
2206                         }
2207                         break;
2208                 case NL80211_IFTYPE_WDS:
2209                 case NL80211_IFTYPE_AP_VLAN:
2210                 case NL80211_IFTYPE_MONITOR:
2211                 case NL80211_IFTYPE_P2P_DEVICE:
2212                         /* nothing to do */
2213                         break;
2214                 case NL80211_IFTYPE_UNSPECIFIED:
2215                 case NUM_NL80211_IFTYPES:
2216                 case NL80211_IFTYPE_P2P_CLIENT:
2217                 case NL80211_IFTYPE_P2P_GO:
2218                         WARN_ON(1);
2219                         break;
2220                 }
2221         }
2222
2223         ieee80211_recalc_ps(local);
2224
2225         /*
2226          * The sta might be in psm against the ap (e.g. because
2227          * this was the state before a hw restart), so we
2228          * explicitly send a null packet in order to make sure
2229          * it'll sync against the ap (and get out of psm).
2230          */
2231         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2232                 list_for_each_entry(sdata, &local->interfaces, list) {
2233                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2234                                 continue;
2235                         if (!sdata->u.mgd.associated)
2236                                 continue;
2237
2238                         ieee80211_send_nullfunc(local, sdata, false);
2239                 }
2240         }
2241
2242         /* APs are now beaconing, add back stations */
2243         mutex_lock(&local->sta_mtx);
2244         list_for_each_entry(sta, &local->sta_list, list) {
2245                 enum ieee80211_sta_state state;
2246
2247                 if (!sta->uploaded)
2248                         continue;
2249
2250                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2251                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2252                         continue;
2253
2254                 for (state = IEEE80211_STA_NOTEXIST;
2255                      state < sta->sta_state; state++)
2256                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2257                                               state + 1));
2258         }
2259         mutex_unlock(&local->sta_mtx);
2260
2261         /* add back keys */
2262         list_for_each_entry(sdata, &local->interfaces, list)
2263                 ieee80211_reset_crypto_tx_tailroom(sdata);
2264
2265         list_for_each_entry(sdata, &local->interfaces, list)
2266                 if (ieee80211_sdata_running(sdata))
2267                         ieee80211_enable_keys(sdata);
2268
2269         /* Reconfigure sched scan if it was interrupted by FW restart */
2270         mutex_lock(&local->mtx);
2271         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2272                                                 lockdep_is_held(&local->mtx));
2273         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2274                                                 lockdep_is_held(&local->mtx));
2275         if (sched_scan_sdata && sched_scan_req)
2276                 /*
2277                  * Sched scan stopped, but we don't want to report it. Instead,
2278                  * we're trying to reschedule. However, if more than one scan
2279                  * plan was set, we cannot reschedule since we don't know which
2280                  * scan plan was currently running (and some scan plans may have
2281                  * already finished).
2282                  */
2283                 if (sched_scan_req->n_scan_plans > 1 ||
2284                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2285                                                          sched_scan_req)) {
2286                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2287                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2288                         sched_scan_stopped = true;
2289                 }
2290         mutex_unlock(&local->mtx);
2291
2292         if (sched_scan_stopped)
2293                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2294
2295  wake_up:
2296
2297         if (local->monitors == local->open_count && local->monitors > 0)
2298                 ieee80211_add_virtual_monitor(local);
2299
2300         /*
2301          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2302          * sessions can be established after a resume.
2303          *
2304          * Also tear down aggregation sessions since reconfiguring
2305          * them in a hardware restart scenario is not easily done
2306          * right now, and the hardware will have lost information
2307          * about the sessions, but we and the AP still think they
2308          * are active. This is really a workaround though.
2309          */
2310         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2311                 mutex_lock(&local->sta_mtx);
2312
2313                 list_for_each_entry(sta, &local->sta_list, list) {
2314                         if (!local->resuming)
2315                                 ieee80211_sta_tear_down_BA_sessions(
2316                                                 sta, AGG_STOP_LOCAL_REQUEST);
2317                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2318                 }
2319
2320                 mutex_unlock(&local->sta_mtx);
2321         }
2322
2323         if (local->in_reconfig) {
2324                 local->in_reconfig = false;
2325                 barrier();
2326
2327                 /* Restart deferred ROCs */
2328                 mutex_lock(&local->mtx);
2329                 ieee80211_start_next_roc(local);
2330                 mutex_unlock(&local->mtx);
2331         }
2332
2333         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2334                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2335                                         false);
2336
2337         /*
2338          * If this is for hw restart things are still running.
2339          * We may want to change that later, however.
2340          */
2341         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2342                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2343
2344         if (!suspended)
2345                 return 0;
2346
2347 #ifdef CONFIG_PM
2348         /* first set suspended false, then resuming */
2349         local->suspended = false;
2350         mb();
2351         local->resuming = false;
2352
2353         ieee80211_flush_completed_scan(local, false);
2354
2355         if (local->open_count && !reconfig_due_to_wowlan)
2356                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2357
2358         list_for_each_entry(sdata, &local->interfaces, list) {
2359                 if (!ieee80211_sdata_running(sdata))
2360                         continue;
2361                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2362                         ieee80211_sta_restart(sdata);
2363         }
2364
2365         mod_timer(&local->sta_cleanup, jiffies + 1);
2366 #else
2367         WARN_ON(1);
2368 #endif
2369
2370         return 0;
2371 }
2372
2373 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2374 {
2375         struct ieee80211_sub_if_data *sdata;
2376         struct ieee80211_local *local;
2377         struct ieee80211_key *key;
2378
2379         if (WARN_ON(!vif))
2380                 return;
2381
2382         sdata = vif_to_sdata(vif);
2383         local = sdata->local;
2384
2385         if (WARN_ON(!local->resuming))
2386                 return;
2387
2388         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2389                 return;
2390
2391         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2392
2393         mutex_lock(&local->key_mtx);
2394         list_for_each_entry(key, &sdata->key_list, list)
2395                 key->flags |= KEY_FLAG_TAINTED;
2396         mutex_unlock(&local->key_mtx);
2397 }
2398 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2399
2400 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2401 {
2402         struct ieee80211_local *local = sdata->local;
2403         struct ieee80211_chanctx_conf *chanctx_conf;
2404         struct ieee80211_chanctx *chanctx;
2405
2406         mutex_lock(&local->chanctx_mtx);
2407
2408         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2409                                         lockdep_is_held(&local->chanctx_mtx));
2410
2411         /*
2412          * This function can be called from a work, thus it may be possible
2413          * that the chanctx_conf is removed (due to a disconnection, for
2414          * example).
2415          * So nothing should be done in such case.
2416          */
2417         if (!chanctx_conf)
2418                 goto unlock;
2419
2420         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2421         ieee80211_recalc_smps_chanctx(local, chanctx);
2422  unlock:
2423         mutex_unlock(&local->chanctx_mtx);
2424 }
2425
2426 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2427 {
2428         struct ieee80211_local *local = sdata->local;
2429         struct ieee80211_chanctx_conf *chanctx_conf;
2430         struct ieee80211_chanctx *chanctx;
2431
2432         mutex_lock(&local->chanctx_mtx);
2433
2434         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2435                                         lockdep_is_held(&local->chanctx_mtx));
2436
2437         if (WARN_ON_ONCE(!chanctx_conf))
2438                 goto unlock;
2439
2440         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2441         ieee80211_recalc_chanctx_min_def(local, chanctx);
2442  unlock:
2443         mutex_unlock(&local->chanctx_mtx);
2444 }
2445
2446 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2447 {
2448         size_t pos = offset;
2449
2450         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2451                 pos += 2 + ies[pos + 1];
2452
2453         return pos;
2454 }
2455
2456 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2457                                             int rssi_min_thold,
2458                                             int rssi_max_thold)
2459 {
2460         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2461
2462         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2463                 return;
2464
2465         /*
2466          * Scale up threshold values before storing it, as the RSSI averaging
2467          * algorithm uses a scaled up value as well. Change this scaling
2468          * factor if the RSSI averaging algorithm changes.
2469          */
2470         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2471         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2472 }
2473
2474 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2475                                     int rssi_min_thold,
2476                                     int rssi_max_thold)
2477 {
2478         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2479
2480         WARN_ON(rssi_min_thold == rssi_max_thold ||
2481                 rssi_min_thold > rssi_max_thold);
2482
2483         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2484                                        rssi_max_thold);
2485 }
2486 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2487
2488 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2489 {
2490         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2491
2492         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2493 }
2494 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2495
2496 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2497                               u16 cap)
2498 {
2499         __le16 tmp;
2500
2501         *pos++ = WLAN_EID_HT_CAPABILITY;
2502         *pos++ = sizeof(struct ieee80211_ht_cap);
2503         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2504
2505         /* capability flags */
2506         tmp = cpu_to_le16(cap);
2507         memcpy(pos, &tmp, sizeof(u16));
2508         pos += sizeof(u16);
2509
2510         /* AMPDU parameters */
2511         *pos++ = ht_cap->ampdu_factor |
2512                  (ht_cap->ampdu_density <<
2513                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2514
2515         /* MCS set */
2516         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2517         pos += sizeof(ht_cap->mcs);
2518
2519         /* extended capabilities */
2520         pos += sizeof(__le16);
2521
2522         /* BF capabilities */
2523         pos += sizeof(__le32);
2524
2525         /* antenna selection */
2526         pos += sizeof(u8);
2527
2528         return pos;
2529 }
2530
2531 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2532                                u32 cap)
2533 {
2534         __le32 tmp;
2535
2536         *pos++ = WLAN_EID_VHT_CAPABILITY;
2537         *pos++ = sizeof(struct ieee80211_vht_cap);
2538         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2539
2540         /* capability flags */
2541         tmp = cpu_to_le32(cap);
2542         memcpy(pos, &tmp, sizeof(u32));
2543         pos += sizeof(u32);
2544
2545         /* VHT MCS set */
2546         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2547         pos += sizeof(vht_cap->vht_mcs);
2548
2549         return pos;
2550 }
2551
2552 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2553                               const struct ieee80211_sta_he_cap *he_cap,
2554                               u8 *end)
2555 {
2556         u8 n;
2557         u8 ie_len;
2558         u8 *orig_pos = pos;
2559
2560         /* Make sure we have place for the IE */
2561         /*
2562          * TODO: the 1 added is because this temporarily is under the EXTENSION
2563          * IE. Get rid of it when it moves.
2564          */
2565         if (!he_cap)
2566                 return orig_pos;
2567
2568         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2569         ie_len = 2 + 1 +
2570                  sizeof(he_cap->he_cap_elem) + n +
2571                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2572                                        he_cap->he_cap_elem.phy_cap_info);
2573
2574         if ((end - pos) < ie_len)
2575                 return orig_pos;
2576
2577         *pos++ = WLAN_EID_EXTENSION;
2578         pos++; /* We'll set the size later below */
2579         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2580
2581         /* Fixed data */
2582         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2583         pos += sizeof(he_cap->he_cap_elem);
2584
2585         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2586         pos += n;
2587
2588         /* Check if PPE Threshold should be present */
2589         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2590              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2591                 goto end;
2592
2593         /*
2594          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2595          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2596          */
2597         n = hweight8(he_cap->ppe_thres[0] &
2598                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2599         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2600                    IEEE80211_PPE_THRES_NSS_POS));
2601
2602         /*
2603          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2604          * total size.
2605          */
2606         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2607         n = DIV_ROUND_UP(n, 8);
2608
2609         /* Copy PPE Thresholds */
2610         memcpy(pos, &he_cap->ppe_thres, n);
2611         pos += n;
2612
2613 end:
2614         orig_pos[1] = (pos - orig_pos) - 2;
2615         return pos;
2616 }
2617
2618 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2619                                const struct cfg80211_chan_def *chandef,
2620                                u16 prot_mode, bool rifs_mode)
2621 {
2622         struct ieee80211_ht_operation *ht_oper;
2623         /* Build HT Information */
2624         *pos++ = WLAN_EID_HT_OPERATION;
2625         *pos++ = sizeof(struct ieee80211_ht_operation);
2626         ht_oper = (struct ieee80211_ht_operation *)pos;
2627         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2628                                         chandef->chan->center_freq);
2629         switch (chandef->width) {
2630         case NL80211_CHAN_WIDTH_160:
2631         case NL80211_CHAN_WIDTH_80P80:
2632         case NL80211_CHAN_WIDTH_80:
2633         case NL80211_CHAN_WIDTH_40:
2634                 if (chandef->center_freq1 > chandef->chan->center_freq)
2635                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2636                 else
2637                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2638                 break;
2639         default:
2640                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2641                 break;
2642         }
2643         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2644             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2645             chandef->width != NL80211_CHAN_WIDTH_20)
2646                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2647
2648         if (rifs_mode)
2649                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2650
2651         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2652         ht_oper->stbc_param = 0x0000;
2653
2654         /* It seems that Basic MCS set and Supported MCS set
2655            are identical for the first 10 bytes */
2656         memset(&ht_oper->basic_set, 0, 16);
2657         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2658
2659         return pos + sizeof(struct ieee80211_ht_operation);
2660 }
2661
2662 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2663                                    const struct cfg80211_chan_def *chandef)
2664 {
2665         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2666         *pos++ = 3;                                     /* IE length */
2667         /* New channel width */
2668         switch (chandef->width) {
2669         case NL80211_CHAN_WIDTH_80:
2670                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2671                 break;
2672         case NL80211_CHAN_WIDTH_160:
2673                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2674                 break;
2675         case NL80211_CHAN_WIDTH_80P80:
2676                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2677                 break;
2678         default:
2679                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2680         }
2681
2682         /* new center frequency segment 0 */
2683         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2684         /* new center frequency segment 1 */
2685         if (chandef->center_freq2)
2686                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2687         else
2688                 *pos++ = 0;
2689 }
2690
2691 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2692                                 const struct cfg80211_chan_def *chandef)
2693 {
2694         struct ieee80211_vht_operation *vht_oper;
2695
2696         *pos++ = WLAN_EID_VHT_OPERATION;
2697         *pos++ = sizeof(struct ieee80211_vht_operation);
2698         vht_oper = (struct ieee80211_vht_operation *)pos;
2699         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2700                                                         chandef->center_freq1);
2701         if (chandef->center_freq2)
2702                 vht_oper->center_freq_seg1_idx =
2703                         ieee80211_frequency_to_channel(chandef->center_freq2);
2704         else
2705                 vht_oper->center_freq_seg1_idx = 0x00;
2706
2707         switch (chandef->width) {
2708         case NL80211_CHAN_WIDTH_160:
2709                 /*
2710                  * Convert 160 MHz channel width to new style as interop
2711                  * workaround.
2712                  */
2713                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2714                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2715                 if (chandef->chan->center_freq < chandef->center_freq1)
2716                         vht_oper->center_freq_seg0_idx -= 8;
2717                 else
2718                         vht_oper->center_freq_seg0_idx += 8;
2719                 break;
2720         case NL80211_CHAN_WIDTH_80P80:
2721                 /*
2722                  * Convert 80+80 MHz channel width to new style as interop
2723                  * workaround.
2724                  */
2725                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2726                 break;
2727         case NL80211_CHAN_WIDTH_80:
2728                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2729                 break;
2730         default:
2731                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2732                 break;
2733         }
2734
2735         /* don't require special VHT peer rates */
2736         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2737
2738         return pos + sizeof(struct ieee80211_vht_operation);
2739 }
2740
2741 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2742                                struct cfg80211_chan_def *chandef)
2743 {
2744         enum nl80211_channel_type channel_type;
2745
2746         if (!ht_oper)
2747                 return false;
2748
2749         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2750         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2751                 channel_type = NL80211_CHAN_HT20;
2752                 break;
2753         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2754                 channel_type = NL80211_CHAN_HT40PLUS;
2755                 break;
2756         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2757                 channel_type = NL80211_CHAN_HT40MINUS;
2758                 break;
2759         default:
2760                 channel_type = NL80211_CHAN_NO_HT;
2761                 return false;
2762         }
2763
2764         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2765         return true;
2766 }
2767
2768 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2769                                 const struct ieee80211_vht_operation *oper,
2770                                 const struct ieee80211_ht_operation *htop,
2771                                 struct cfg80211_chan_def *chandef)
2772 {
2773         struct cfg80211_chan_def new = *chandef;
2774         int cf0, cf1;
2775         int ccfs0, ccfs1, ccfs2;
2776         int ccf0, ccf1;
2777
2778         if (!oper || !htop)
2779                 return false;
2780
2781         ccfs0 = oper->center_freq_seg0_idx;
2782         ccfs1 = oper->center_freq_seg1_idx;
2783         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2784                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2785                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2786
2787         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2788         ccf0 = ccfs0;
2789         ccf1 = ccfs1;
2790         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2791                 ccf1 = ccfs2;
2792
2793         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2794         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2795
2796         switch (oper->chan_width) {
2797         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2798                 /* just use HT information directly */
2799                 break;
2800         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2801                 new.width = NL80211_CHAN_WIDTH_80;
2802                 new.center_freq1 = cf0;
2803                 /* If needed, adjust based on the newer interop workaround. */
2804                 if (ccf1) {
2805                         unsigned int diff;
2806
2807                         diff = abs(ccf1 - ccf0);
2808                         if (diff == 8) {
2809                                 new.width = NL80211_CHAN_WIDTH_160;
2810                                 new.center_freq1 = cf1;
2811                         } else if (diff > 8) {
2812                                 new.width = NL80211_CHAN_WIDTH_80P80;
2813                                 new.center_freq2 = cf1;
2814                         }
2815                 }
2816                 break;
2817         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2818                 /* deprecated encoding */
2819                 new.width = NL80211_CHAN_WIDTH_160;
2820                 new.center_freq1 = cf0;
2821                 break;
2822         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2823                 /* deprecated encoding */
2824                 new.width = NL80211_CHAN_WIDTH_80P80;
2825                 new.center_freq1 = cf0;
2826                 new.center_freq2 = cf1;
2827                 break;
2828         default:
2829                 return false;
2830         }
2831
2832         if (!cfg80211_chandef_valid(&new))
2833                 return false;
2834
2835         *chandef = new;
2836         return true;
2837 }
2838
2839 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2840                              const struct ieee80211_supported_band *sband,
2841                              const u8 *srates, int srates_len, u32 *rates)
2842 {
2843         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2844         int shift = ieee80211_chandef_get_shift(chandef);
2845         struct ieee80211_rate *br;
2846         int brate, rate, i, j, count = 0;
2847
2848         *rates = 0;
2849
2850         for (i = 0; i < srates_len; i++) {
2851                 rate = srates[i] & 0x7f;
2852
2853                 for (j = 0; j < sband->n_bitrates; j++) {
2854                         br = &sband->bitrates[j];
2855                         if ((rate_flags & br->flags) != rate_flags)
2856                                 continue;
2857
2858                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2859                         if (brate == rate) {
2860                                 *rates |= BIT(j);
2861                                 count++;
2862                                 break;
2863                         }
2864                 }
2865         }
2866         return count;
2867 }
2868
2869 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2870                             struct sk_buff *skb, bool need_basic,
2871                             enum nl80211_band band)
2872 {
2873         struct ieee80211_local *local = sdata->local;
2874         struct ieee80211_supported_band *sband;
2875         int rate, shift;
2876         u8 i, rates, *pos;
2877         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2878         u32 rate_flags;
2879
2880         shift = ieee80211_vif_get_shift(&sdata->vif);
2881         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2882         sband = local->hw.wiphy->bands[band];
2883         rates = 0;
2884         for (i = 0; i < sband->n_bitrates; i++) {
2885                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2886                         continue;
2887                 rates++;
2888         }
2889         if (rates > 8)
2890                 rates = 8;
2891
2892         if (skb_tailroom(skb) < rates + 2)
2893                 return -ENOMEM;
2894
2895         pos = skb_put(skb, rates + 2);
2896         *pos++ = WLAN_EID_SUPP_RATES;
2897         *pos++ = rates;
2898         for (i = 0; i < rates; i++) {
2899                 u8 basic = 0;
2900                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2901                         continue;
2902
2903                 if (need_basic && basic_rates & BIT(i))
2904                         basic = 0x80;
2905                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2906                                     5 * (1 << shift));
2907                 *pos++ = basic | (u8) rate;
2908         }
2909
2910         return 0;
2911 }
2912
2913 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2914                                 struct sk_buff *skb, bool need_basic,
2915                                 enum nl80211_band band)
2916 {
2917         struct ieee80211_local *local = sdata->local;
2918         struct ieee80211_supported_band *sband;
2919         int rate, shift;
2920         u8 i, exrates, *pos;
2921         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2922         u32 rate_flags;
2923
2924         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2925         shift = ieee80211_vif_get_shift(&sdata->vif);
2926
2927         sband = local->hw.wiphy->bands[band];
2928         exrates = 0;
2929         for (i = 0; i < sband->n_bitrates; i++) {
2930                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2931                         continue;
2932                 exrates++;
2933         }
2934
2935         if (exrates > 8)
2936                 exrates -= 8;
2937         else
2938                 exrates = 0;
2939
2940         if (skb_tailroom(skb) < exrates + 2)
2941                 return -ENOMEM;
2942
2943         if (exrates) {
2944                 pos = skb_put(skb, exrates + 2);
2945                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2946                 *pos++ = exrates;
2947                 for (i = 8; i < sband->n_bitrates; i++) {
2948                         u8 basic = 0;
2949                         if ((rate_flags & sband->bitrates[i].flags)
2950                             != rate_flags)
2951                                 continue;
2952                         if (need_basic && basic_rates & BIT(i))
2953                                 basic = 0x80;
2954                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2955                                             5 * (1 << shift));
2956                         *pos++ = basic | (u8) rate;
2957                 }
2958         }
2959         return 0;
2960 }
2961
2962 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2963 {
2964         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2965         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2966
2967         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2968                 /* non-managed type inferfaces */
2969                 return 0;
2970         }
2971         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2972 }
2973 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2974
2975 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2976 {
2977         if (!mcs)
2978                 return 1;
2979
2980         /* TODO: consider rx_highest */
2981
2982         if (mcs->rx_mask[3])
2983                 return 4;
2984         if (mcs->rx_mask[2])
2985                 return 3;
2986         if (mcs->rx_mask[1])
2987                 return 2;
2988         return 1;
2989 }
2990
2991 /**
2992  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2993  * @local: mac80211 hw info struct
2994  * @status: RX status
2995  * @mpdu_len: total MPDU length (including FCS)
2996  * @mpdu_offset: offset into MPDU to calculate timestamp at
2997  *
2998  * This function calculates the RX timestamp at the given MPDU offset, taking
2999  * into account what the RX timestamp was. An offset of 0 will just normalize
3000  * the timestamp to TSF at beginning of MPDU reception.
3001  */
3002 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3003                                      struct ieee80211_rx_status *status,
3004                                      unsigned int mpdu_len,
3005                                      unsigned int mpdu_offset)
3006 {
3007         u64 ts = status->mactime;
3008         struct rate_info ri;
3009         u16 rate;
3010
3011         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3012                 return 0;
3013
3014         memset(&ri, 0, sizeof(ri));
3015
3016         ri.bw = status->bw;
3017
3018         /* Fill cfg80211 rate info */
3019         switch (status->encoding) {
3020         case RX_ENC_HT:
3021                 ri.mcs = status->rate_idx;
3022                 ri.flags |= RATE_INFO_FLAGS_MCS;
3023                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3024                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3025                 break;
3026         case RX_ENC_VHT:
3027                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3028                 ri.mcs = status->rate_idx;
3029                 ri.nss = status->nss;
3030                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3031                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3032                 break;
3033         default:
3034                 WARN_ON(1);
3035                 /* fall through */
3036         case RX_ENC_LEGACY: {
3037                 struct ieee80211_supported_band *sband;
3038                 int shift = 0;
3039                 int bitrate;
3040
3041                 switch (status->bw) {
3042                 case RATE_INFO_BW_10:
3043                         shift = 1;
3044                         break;
3045                 case RATE_INFO_BW_5:
3046                         shift = 2;
3047                         break;
3048                 }
3049
3050                 sband = local->hw.wiphy->bands[status->band];
3051                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3052                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3053
3054                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3055                         /* TODO: handle HT/VHT preambles */
3056                         if (status->band == NL80211_BAND_5GHZ) {
3057                                 ts += 20 << shift;
3058                                 mpdu_offset += 2;
3059                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3060                                 ts += 96;
3061                         } else {
3062                                 ts += 192;
3063                         }
3064                 }
3065                 break;
3066                 }
3067         }
3068
3069         rate = cfg80211_calculate_bitrate(&ri);
3070         if (WARN_ONCE(!rate,
3071                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3072                       (unsigned long long)status->flag, status->rate_idx,
3073                       status->nss))
3074                 return 0;
3075
3076         /* rewind from end of MPDU */
3077         if (status->flag & RX_FLAG_MACTIME_END)
3078                 ts -= mpdu_len * 8 * 10 / rate;
3079
3080         ts += mpdu_offset * 8 * 10 / rate;
3081
3082         return ts;
3083 }
3084
3085 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3086 {
3087         struct ieee80211_sub_if_data *sdata;
3088         struct cfg80211_chan_def chandef;
3089
3090         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3091         ASSERT_RTNL();
3092
3093         mutex_lock(&local->mtx);
3094         list_for_each_entry(sdata, &local->interfaces, list) {
3095                 /* it might be waiting for the local->mtx, but then
3096                  * by the time it gets it, sdata->wdev.cac_started
3097                  * will no longer be true
3098                  */
3099                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3100
3101                 if (sdata->wdev.cac_started) {
3102                         chandef = sdata->vif.bss_conf.chandef;
3103                         ieee80211_vif_release_channel(sdata);
3104                         cfg80211_cac_event(sdata->dev,
3105                                            &chandef,
3106                                            NL80211_RADAR_CAC_ABORTED,
3107                                            GFP_KERNEL);
3108                 }
3109         }
3110         mutex_unlock(&local->mtx);
3111 }
3112
3113 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3114 {
3115         struct ieee80211_local *local =
3116                 container_of(work, struct ieee80211_local, radar_detected_work);
3117         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3118         struct ieee80211_chanctx *ctx;
3119         int num_chanctx = 0;
3120
3121         mutex_lock(&local->chanctx_mtx);
3122         list_for_each_entry(ctx, &local->chanctx_list, list) {
3123                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3124                         continue;
3125
3126                 num_chanctx++;
3127                 chandef = ctx->conf.def;
3128         }
3129         mutex_unlock(&local->chanctx_mtx);
3130
3131         rtnl_lock();
3132         ieee80211_dfs_cac_cancel(local);
3133         rtnl_unlock();
3134
3135         if (num_chanctx > 1)
3136                 /* XXX: multi-channel is not supported yet */
3137                 WARN_ON(1);
3138         else
3139                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3140 }
3141
3142 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3143 {
3144         struct ieee80211_local *local = hw_to_local(hw);
3145
3146         trace_api_radar_detected(local);
3147
3148         schedule_work(&local->radar_detected_work);
3149 }
3150 EXPORT_SYMBOL(ieee80211_radar_detected);
3151
3152 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3153 {
3154         u32 ret;
3155         int tmp;
3156
3157         switch (c->width) {
3158         case NL80211_CHAN_WIDTH_20:
3159                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3160                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3161                 break;
3162         case NL80211_CHAN_WIDTH_40:
3163                 c->width = NL80211_CHAN_WIDTH_20;
3164                 c->center_freq1 = c->chan->center_freq;
3165                 ret = IEEE80211_STA_DISABLE_40MHZ |
3166                       IEEE80211_STA_DISABLE_VHT;
3167                 break;
3168         case NL80211_CHAN_WIDTH_80:
3169                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3170                 /* n_P40 */
3171                 tmp /= 2;
3172                 /* freq_P40 */
3173                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3174                 c->width = NL80211_CHAN_WIDTH_40;
3175                 ret = IEEE80211_STA_DISABLE_VHT;
3176                 break;
3177         case NL80211_CHAN_WIDTH_80P80:
3178                 c->center_freq2 = 0;
3179                 c->width = NL80211_CHAN_WIDTH_80;
3180                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3181                       IEEE80211_STA_DISABLE_160MHZ;
3182                 break;
3183         case NL80211_CHAN_WIDTH_160:
3184                 /* n_P20 */
3185                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3186                 /* n_P80 */
3187                 tmp /= 4;
3188                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3189                 c->width = NL80211_CHAN_WIDTH_80;
3190                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3191                       IEEE80211_STA_DISABLE_160MHZ;
3192                 break;
3193         default:
3194         case NL80211_CHAN_WIDTH_20_NOHT:
3195                 WARN_ON_ONCE(1);
3196                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3197                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3198                 break;
3199         case NL80211_CHAN_WIDTH_5:
3200         case NL80211_CHAN_WIDTH_10:
3201                 WARN_ON_ONCE(1);
3202                 /* keep c->width */
3203                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3204                 break;
3205         }
3206
3207         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3208
3209         return ret;
3210 }
3211
3212 /*
3213  * Returns true if smps_mode_new is strictly more restrictive than
3214  * smps_mode_old.
3215  */
3216 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3217                                    enum ieee80211_smps_mode smps_mode_new)
3218 {
3219         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3220                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3221                 return false;
3222
3223         switch (smps_mode_old) {
3224         case IEEE80211_SMPS_STATIC:
3225                 return false;
3226         case IEEE80211_SMPS_DYNAMIC:
3227                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3228         case IEEE80211_SMPS_OFF:
3229                 return smps_mode_new != IEEE80211_SMPS_OFF;
3230         default:
3231                 WARN_ON(1);
3232         }
3233
3234         return false;
3235 }
3236
3237 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3238                               struct cfg80211_csa_settings *csa_settings)
3239 {
3240         struct sk_buff *skb;
3241         struct ieee80211_mgmt *mgmt;
3242         struct ieee80211_local *local = sdata->local;
3243         int freq;
3244         int hdr_len = offsetofend(struct ieee80211_mgmt,
3245                                   u.action.u.chan_switch);
3246         u8 *pos;
3247
3248         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3249             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3250                 return -EOPNOTSUPP;
3251
3252         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3253                             5 + /* channel switch announcement element */
3254                             3 + /* secondary channel offset element */
3255                             5 + /* wide bandwidth channel switch announcement */
3256                             8); /* mesh channel switch parameters element */
3257         if (!skb)
3258                 return -ENOMEM;
3259
3260         skb_reserve(skb, local->tx_headroom);
3261         mgmt = skb_put_zero(skb, hdr_len);
3262         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3263                                           IEEE80211_STYPE_ACTION);
3264
3265         eth_broadcast_addr(mgmt->da);
3266         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3267         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3268                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3269         } else {
3270                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3271                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3272         }
3273         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3274         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3275         pos = skb_put(skb, 5);
3276         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3277         *pos++ = 3;                                             /* IE length */
3278         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3279         freq = csa_settings->chandef.chan->center_freq;
3280         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3281         *pos++ = csa_settings->count;                           /* count */
3282
3283         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3284                 enum nl80211_channel_type ch_type;
3285
3286                 skb_put(skb, 3);
3287                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3288                 *pos++ = 1;                                     /* IE length */
3289                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3290                 if (ch_type == NL80211_CHAN_HT40PLUS)
3291                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3292                 else
3293                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3294         }
3295
3296         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3297                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3298
3299                 skb_put(skb, 8);
3300                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3301                 *pos++ = 6;                                     /* IE length */
3302                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3303                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3304                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3305                 *pos++ |= csa_settings->block_tx ?
3306                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3307                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3308                 pos += 2;
3309                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3310                 pos += 2;
3311         }
3312
3313         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3314             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3315             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3316                 skb_put(skb, 5);
3317                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3318         }
3319
3320         ieee80211_tx_skb(sdata, skb);
3321         return 0;
3322 }
3323
3324 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3325 {
3326         return !(cs == NULL || cs->cipher == 0 ||
3327                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3328                  cs->hdr_len <= cs->key_idx_off ||
3329                  cs->key_idx_shift > 7 ||
3330                  cs->key_idx_mask == 0);
3331 }
3332
3333 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3334 {
3335         int i;
3336
3337         /* Ensure we have enough iftype bitmap space for all iftype values */
3338         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3339
3340         for (i = 0; i < n; i++)
3341                 if (!ieee80211_cs_valid(&cs[i]))
3342                         return false;
3343
3344         return true;
3345 }
3346
3347 const struct ieee80211_cipher_scheme *
3348 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3349                  enum nl80211_iftype iftype)
3350 {
3351         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3352         int n = local->hw.n_cipher_schemes;
3353         int i;
3354         const struct ieee80211_cipher_scheme *cs = NULL;
3355
3356         for (i = 0; i < n; i++) {
3357                 if (l[i].cipher == cipher) {
3358                         cs = &l[i];
3359                         break;
3360                 }
3361         }
3362
3363         if (!cs || !(cs->iftype & BIT(iftype)))
3364                 return NULL;
3365
3366         return cs;
3367 }
3368
3369 int ieee80211_cs_headroom(struct ieee80211_local *local,
3370                           struct cfg80211_crypto_settings *crypto,
3371                           enum nl80211_iftype iftype)
3372 {
3373         const struct ieee80211_cipher_scheme *cs;
3374         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3375         int i;
3376
3377         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3378                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3379                                       iftype);
3380
3381                 if (cs && headroom < cs->hdr_len)
3382                         headroom = cs->hdr_len;
3383         }
3384
3385         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3386         if (cs && headroom < cs->hdr_len)
3387                 headroom = cs->hdr_len;
3388
3389         return headroom;
3390 }
3391
3392 static bool
3393 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3394 {
3395         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3396         int skip;
3397
3398         if (end > 0)
3399                 return false;
3400
3401         /* One shot NOA  */
3402         if (data->count[i] == 1)
3403                 return false;
3404
3405         if (data->desc[i].interval == 0)
3406                 return false;
3407
3408         /* End time is in the past, check for repetitions */
3409         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3410         if (data->count[i] < 255) {
3411                 if (data->count[i] <= skip) {
3412                         data->count[i] = 0;
3413                         return false;
3414                 }
3415
3416                 data->count[i] -= skip;
3417         }
3418
3419         data->desc[i].start += skip * data->desc[i].interval;
3420
3421         return true;
3422 }
3423
3424 static bool
3425 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3426                              s32 *offset)
3427 {
3428         bool ret = false;
3429         int i;
3430
3431         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3432                 s32 cur;
3433
3434                 if (!data->count[i])
3435                         continue;
3436
3437                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3438                         ret = true;
3439
3440                 cur = data->desc[i].start - tsf;
3441                 if (cur > *offset)
3442                         continue;
3443
3444                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3445                 if (cur > *offset)
3446                         *offset = cur;
3447         }
3448
3449         return ret;
3450 }
3451
3452 static u32
3453 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3454 {
3455         s32 offset = 0;
3456         int tries = 0;
3457         /*
3458          * arbitrary limit, used to avoid infinite loops when combined NoA
3459          * descriptors cover the full time period.
3460          */
3461         int max_tries = 5;
3462
3463         ieee80211_extend_absent_time(data, tsf, &offset);
3464         do {
3465                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3466                         break;
3467
3468                 tries++;
3469         } while (tries < max_tries);
3470
3471         return offset;
3472 }
3473
3474 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3475 {
3476         u32 next_offset = BIT(31) - 1;
3477         int i;
3478
3479         data->absent = 0;
3480         data->has_next_tsf = false;
3481         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3482                 s32 start;
3483
3484                 if (!data->count[i])
3485                         continue;
3486
3487                 ieee80211_extend_noa_desc(data, tsf, i);
3488                 start = data->desc[i].start - tsf;
3489                 if (start <= 0)
3490                         data->absent |= BIT(i);
3491
3492                 if (next_offset > start)
3493                         next_offset = start;
3494
3495                 data->has_next_tsf = true;
3496         }
3497
3498         if (data->absent)
3499                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3500
3501         data->next_tsf = tsf + next_offset;
3502 }
3503 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3504
3505 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3506                             struct ieee80211_noa_data *data, u32 tsf)
3507 {
3508         int ret = 0;
3509         int i;
3510
3511         memset(data, 0, sizeof(*data));
3512
3513         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3514                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3515
3516                 if (!desc->count || !desc->duration)
3517                         continue;
3518
3519                 data->count[i] = desc->count;
3520                 data->desc[i].start = le32_to_cpu(desc->start_time);
3521                 data->desc[i].duration = le32_to_cpu(desc->duration);
3522                 data->desc[i].interval = le32_to_cpu(desc->interval);
3523
3524                 if (data->count[i] > 1 &&
3525                     data->desc[i].interval < data->desc[i].duration)
3526                         continue;
3527
3528                 ieee80211_extend_noa_desc(data, tsf, i);
3529                 ret++;
3530         }
3531
3532         if (ret)
3533                 ieee80211_update_p2p_noa(data, tsf);
3534
3535         return ret;
3536 }
3537 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3538
3539 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3540                            struct ieee80211_sub_if_data *sdata)
3541 {
3542         u64 tsf = drv_get_tsf(local, sdata);
3543         u64 dtim_count = 0;
3544         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3545         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3546         struct ps_data *ps;
3547         u8 bcns_from_dtim;
3548
3549         if (tsf == -1ULL || !beacon_int || !dtim_period)
3550                 return;
3551
3552         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3553             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3554                 if (!sdata->bss)
3555                         return;
3556
3557                 ps = &sdata->bss->ps;
3558         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3559                 ps = &sdata->u.mesh.ps;
3560         } else {
3561                 return;
3562         }
3563
3564         /*
3565          * actually finds last dtim_count, mac80211 will update in
3566          * __beacon_add_tim().
3567          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3568          */
3569         do_div(tsf, beacon_int);
3570         bcns_from_dtim = do_div(tsf, dtim_period);
3571         /* just had a DTIM */
3572         if (!bcns_from_dtim)
3573                 dtim_count = 0;
3574         else
3575                 dtim_count = dtim_period - bcns_from_dtim;
3576
3577         ps->dtim_count = dtim_count;
3578 }
3579
3580 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3581                                          struct ieee80211_chanctx *ctx)
3582 {
3583         struct ieee80211_sub_if_data *sdata;
3584         u8 radar_detect = 0;
3585
3586         lockdep_assert_held(&local->chanctx_mtx);
3587
3588         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3589                 return 0;
3590
3591         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3592                 if (sdata->reserved_radar_required)
3593                         radar_detect |= BIT(sdata->reserved_chandef.width);
3594
3595         /*
3596          * An in-place reservation context should not have any assigned vifs
3597          * until it replaces the other context.
3598          */
3599         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3600                 !list_empty(&ctx->assigned_vifs));
3601
3602         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3603                 if (sdata->radar_required)
3604                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3605
3606         return radar_detect;
3607 }
3608
3609 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3610                                  const struct cfg80211_chan_def *chandef,
3611                                  enum ieee80211_chanctx_mode chanmode,
3612                                  u8 radar_detect)
3613 {
3614         struct ieee80211_local *local = sdata->local;
3615         struct ieee80211_sub_if_data *sdata_iter;
3616         enum nl80211_iftype iftype = sdata->wdev.iftype;
3617         struct ieee80211_chanctx *ctx;
3618         int total = 1;
3619         struct iface_combination_params params = {
3620                 .radar_detect = radar_detect,
3621         };
3622
3623         lockdep_assert_held(&local->chanctx_mtx);
3624
3625         if (WARN_ON(hweight32(radar_detect) > 1))
3626                 return -EINVAL;
3627
3628         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3629                     !chandef->chan))
3630                 return -EINVAL;
3631
3632         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3633                 return -EINVAL;
3634
3635         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3636             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3637                 /*
3638                  * always passing this is harmless, since it'll be the
3639                  * same value that cfg80211 finds if it finds the same
3640                  * interface ... and that's always allowed
3641                  */
3642                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3643         }
3644
3645         /* Always allow software iftypes */
3646         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3647                 if (radar_detect)
3648                         return -EINVAL;
3649                 return 0;
3650         }
3651
3652         if (chandef)
3653                 params.num_different_channels = 1;
3654
3655         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3656                 params.iftype_num[iftype] = 1;
3657
3658         list_for_each_entry(ctx, &local->chanctx_list, list) {
3659                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3660                         continue;
3661                 params.radar_detect |=
3662                         ieee80211_chanctx_radar_detect(local, ctx);
3663                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3664                         params.num_different_channels++;
3665                         continue;
3666                 }
3667                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3668                     cfg80211_chandef_compatible(chandef,
3669                                                 &ctx->conf.def))
3670                         continue;
3671                 params.num_different_channels++;
3672         }
3673
3674         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3675                 struct wireless_dev *wdev_iter;
3676
3677                 wdev_iter = &sdata_iter->wdev;
3678
3679                 if (sdata_iter == sdata ||
3680                     !ieee80211_sdata_running(sdata_iter) ||
3681                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3682                         continue;
3683
3684                 params.iftype_num[wdev_iter->iftype]++;
3685                 total++;
3686         }
3687
3688         if (total == 1 && !params.radar_detect)
3689                 return 0;
3690
3691         return cfg80211_check_combinations(local->hw.wiphy, &params);
3692 }
3693
3694 static void
3695 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3696                          void *data)
3697 {
3698         u32 *max_num_different_channels = data;
3699
3700         *max_num_different_channels = max(*max_num_different_channels,
3701                                           c->num_different_channels);
3702 }
3703
3704 int ieee80211_max_num_channels(struct ieee80211_local *local)
3705 {
3706         struct ieee80211_sub_if_data *sdata;
3707         struct ieee80211_chanctx *ctx;
3708         u32 max_num_different_channels = 1;
3709         int err;
3710         struct iface_combination_params params = {0};
3711
3712         lockdep_assert_held(&local->chanctx_mtx);
3713
3714         list_for_each_entry(ctx, &local->chanctx_list, list) {
3715                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3716                         continue;
3717
3718                 params.num_different_channels++;
3719
3720                 params.radar_detect |=
3721                         ieee80211_chanctx_radar_detect(local, ctx);
3722         }
3723
3724         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3725                 params.iftype_num[sdata->wdev.iftype]++;
3726
3727         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3728                                          ieee80211_iter_max_chans,
3729                                          &max_num_different_channels);
3730         if (err < 0)
3731                 return err;
3732
3733         return max_num_different_channels;
3734 }
3735
3736 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3737 {
3738         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3739         *buf++ = 7; /* len */
3740         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3741         *buf++ = 0x50;
3742         *buf++ = 0xf2;
3743         *buf++ = 2; /* WME */
3744         *buf++ = 0; /* WME info */
3745         *buf++ = 1; /* WME ver */
3746         *buf++ = qosinfo; /* U-APSD no in use */
3747
3748         return buf;
3749 }
3750
3751 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3752                              unsigned long *frame_cnt,
3753                              unsigned long *byte_cnt)
3754 {
3755         struct txq_info *txqi = to_txq_info(txq);
3756         u32 frag_cnt = 0, frag_bytes = 0;
3757         struct sk_buff *skb;
3758
3759         skb_queue_walk(&txqi->frags, skb) {
3760                 frag_cnt++;
3761                 frag_bytes += skb->len;
3762         }
3763
3764         if (frame_cnt)
3765                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3766
3767         if (byte_cnt)
3768                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3769 }
3770 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3771
3772 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3773         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3774         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3775         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3776         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3777 };