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  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * utilities for mac80211
  14  */
  15
  16 #include <net/mac80211.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/export.h>
  19 #include <linux/types.h>
  20 #include <linux/slab.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/bitmap.h>
  25 #include <linux/crc32.h>
  26 #include <net/net_namespace.h>
  27 #include <net/cfg80211.h>
  28 #include <net/rtnetlink.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "mesh.h"
  34 #include "wme.h"
  35 #include "led.h"
  36 #include "wep.h"
  37
  38 /* privid for wiphys to determine whether they belong to us or not */
  39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  40
  41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  42 {
  43         struct ieee80211_local *local;
  44         BUG_ON(!wiphy);
  45
  46         local = wiphy_priv(wiphy);
  47         return &local->hw;
  48 }
  49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  50
  51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  52 {
  53         struct sk_buff *skb;
  54         struct ieee80211_hdr *hdr;
  55
  56         skb_queue_walk(&tx->skbs, skb) {
  57                 hdr = (struct ieee80211_hdr *) skb->data;
  58                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  59         }
  60 }
  61
  62 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  63                              int rate, int erp, int short_preamble,
  64                              int shift)
  65 {
  66         int dur;
  67
  68         /* calculate duration (in microseconds, rounded up to next higher
  69          * integer if it includes a fractional microsecond) to send frame of
  70          * len bytes (does not include FCS) at the given rate. Duration will
  71          * also include SIFS.
  72          *
  73          * rate is in 100 kbps, so divident is multiplied by 10 in the
  74          * DIV_ROUND_UP() operations.
  75          *
  76          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  77          * is assumed to be 0 otherwise.
  78          */
  79
  80         if (band == NL80211_BAND_5GHZ || erp) {
  81                 /*
  82                  * OFDM:
  83                  *
  84                  * N_DBPS = DATARATE x 4
  85                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  86                  *      (16 = SIGNAL time, 6 = tail bits)
  87                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  88                  *
  89                  * T_SYM = 4 usec
  90                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  91                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  92                  *      signal ext = 6 usec
  93                  */
  94                 dur = 16; /* SIFS + signal ext */
  95                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  96                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  97
  98                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  99                  *  * times 4 for 5 MHz
 100                  *  * times 2 for 10 MHz
 101                  */
 102                 dur *= 1 << shift;
 103
 104                 /* rates should already consider the channel bandwidth,
 105                  * don't apply divisor again.
 106                  */
 107                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 108                                         4 * rate); /* T_SYM x N_SYM */
 109         } else {
 110                 /*
 111                  * 802.11b or 802.11g with 802.11b compatibility:
 112                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 113                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 114                  *
 115                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 116                  * aSIFSTime = 10 usec
 117                  * aPreambleLength = 144 usec or 72 usec with short preamble
 118                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 119                  */
 120                 dur = 10; /* aSIFSTime = 10 usec */
 121                 dur += short_preamble ? (72 + 24) : (144 + 48);
 122
 123                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 124         }
 125
 126         return dur;
 127 }
 128
 129 /* Exported duration function for driver use */
 130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 131                                         struct ieee80211_vif *vif,
 132                                         enum nl80211_band band,
 133                                         size_t frame_len,
 134                                         struct ieee80211_rate *rate)
 135 {
 136         struct ieee80211_sub_if_data *sdata;
 137         u16 dur;
 138         int erp, shift = 0;
 139         bool short_preamble = false;
 140
 141         erp = 0;
 142         if (vif) {
 143                 sdata = vif_to_sdata(vif);
 144                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 145                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 146                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 147                 shift = ieee80211_vif_get_shift(vif);
 148         }
 149
 150         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 151                                        short_preamble, shift);
 152
 153         return cpu_to_le16(dur);
 154 }
 155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 156
 157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 158                               struct ieee80211_vif *vif, size_t frame_len,
 159                               const struct ieee80211_tx_info *frame_txctl)
 160 {
 161         struct ieee80211_local *local = hw_to_local(hw);
 162         struct ieee80211_rate *rate;
 163         struct ieee80211_sub_if_data *sdata;
 164         bool short_preamble;
 165         int erp, shift = 0, bitrate;
 166         u16 dur;
 167         struct ieee80211_supported_band *sband;
 168
 169         sband = local->hw.wiphy->bands[frame_txctl->band];
 170
 171         short_preamble = false;
 172
 173         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 174
 175         erp = 0;
 176         if (vif) {
 177                 sdata = vif_to_sdata(vif);
 178                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 179                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 180                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 181                 shift = ieee80211_vif_get_shift(vif);
 182         }
 183
 184         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 185
 186         /* CTS duration */
 187         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 188                                        erp, short_preamble, shift);
 189         /* Data frame duration */
 190         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 191                                         erp, short_preamble, shift);
 192         /* ACK duration */
 193         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 194                                         erp, short_preamble, shift);
 195
 196         return cpu_to_le16(dur);
 197 }
 198 EXPORT_SYMBOL(ieee80211_rts_duration);
 199
 200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 201                                     struct ieee80211_vif *vif,
 202                                     size_t frame_len,
 203                                     const struct ieee80211_tx_info *frame_txctl)
 204 {
 205         struct ieee80211_local *local = hw_to_local(hw);
 206         struct ieee80211_rate *rate;
 207         struct ieee80211_sub_if_data *sdata;
 208         bool short_preamble;
 209         int erp, shift = 0, bitrate;
 210         u16 dur;
 211         struct ieee80211_supported_band *sband;
 212
 213         sband = local->hw.wiphy->bands[frame_txctl->band];
 214
 215         short_preamble = false;
 216
 217         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 218         erp = 0;
 219         if (vif) {
 220                 sdata = vif_to_sdata(vif);
 221                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 222                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 223                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 224                 shift = ieee80211_vif_get_shift(vif);
 225         }
 226
 227         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 228
 229         /* Data frame duration */
 230         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 231                                        erp, short_preamble, shift);
 232         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 233                 /* ACK duration */
 234                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 235                                                 erp, short_preamble, shift);
 236         }
 237
 238         return cpu_to_le16(dur);
 239 }
 240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 241
 242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 243 {
 244         struct ieee80211_sub_if_data *sdata;
 245         int n_acs = IEEE80211_NUM_ACS;
 246
 247         if (local->ops->wake_tx_queue)
 248                 return;
 249
 250         if (local->hw.queues < IEEE80211_NUM_ACS)
 251                 n_acs = 1;
 252
 253         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 254                 int ac;
 255
 256                 if (!sdata->dev)
 257                         continue;
 258
 259                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 260                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 261                         continue;
 262
 263                 for (ac = 0; ac < n_acs; ac++) {
 264                         int ac_queue = sdata->vif.hw_queue[ac];
 265
 266                         if (ac_queue == queue ||
 267                             (sdata->vif.cab_queue == queue &&
 268                              local->queue_stop_reasons[ac_queue] == 0 &&
 269                              skb_queue_empty(&local->pending[ac_queue])))
 270                                 netif_wake_subqueue(sdata->dev, ac);
 271                 }
 272         }
 273 }
 274
 275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 276                                    enum queue_stop_reason reason,
 277                                    bool refcounted)
 278 {
 279         struct ieee80211_local *local = hw_to_local(hw);
 280
 281         trace_wake_queue(local, queue, reason);
 282
 283         if (WARN_ON(queue >= hw->queues))
 284                 return;
 285
 286         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 287                 return;
 288
 289         if (!refcounted) {
 290                 local->q_stop_reasons[queue][reason] = 0;
 291         } else {
 292                 local->q_stop_reasons[queue][reason]--;
 293                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 294                         local->q_stop_reasons[queue][reason] = 0;
 295         }
 296
 297         if (local->q_stop_reasons[queue][reason] == 0)
 298                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 299
 300         if (local->queue_stop_reasons[queue] != 0)
 301                 /* someone still has this queue stopped */
 302                 return;
 303
 304         if (skb_queue_empty(&local->pending[queue])) {
 305                 rcu_read_lock();
 306                 ieee80211_propagate_queue_wake(local, queue);
 307                 rcu_read_unlock();
 308         } else
 309                 tasklet_schedule(&local->tx_pending_tasklet);
 310 }
 311
 312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 313                                     enum queue_stop_reason reason,
 314                                     bool refcounted)
 315 {
 316         struct ieee80211_local *local = hw_to_local(hw);
 317         unsigned long flags;
 318
 319         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 320         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 321         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 322 }
 323
 324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 325 {
 326         ieee80211_wake_queue_by_reason(hw, queue,
 327                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 328                                        false);
 329 }
 330 EXPORT_SYMBOL(ieee80211_wake_queue);
 331
 332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 333                                    enum queue_stop_reason reason,
 334                                    bool refcounted)
 335 {
 336         struct ieee80211_local *local = hw_to_local(hw);
 337         struct ieee80211_sub_if_data *sdata;
 338         int n_acs = IEEE80211_NUM_ACS;
 339
 340         trace_stop_queue(local, queue, reason);
 341
 342         if (WARN_ON(queue >= hw->queues))
 343                 return;
 344
 345         if (!refcounted)
 346                 local->q_stop_reasons[queue][reason] = 1;
 347         else
 348                 local->q_stop_reasons[queue][reason]++;
 349
 350         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 351                 return;
 352
 353         if (local->ops->wake_tx_queue)
 354                 return;
 355
 356         if (local->hw.queues < IEEE80211_NUM_ACS)
 357                 n_acs = 1;
 358
 359         rcu_read_lock();
 360         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 361                 int ac;
 362
 363                 if (!sdata->dev)
 364                         continue;
 365
 366                 for (ac = 0; ac < n_acs; ac++) {
 367                         if (sdata->vif.hw_queue[ac] == queue ||
 368                             sdata->vif.cab_queue == queue)
 369                                 netif_stop_subqueue(sdata->dev, ac);
 370                 }
 371         }
 372         rcu_read_unlock();
 373 }
 374
 375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 376                                     enum queue_stop_reason reason,
 377                                     bool refcounted)
 378 {
 379         struct ieee80211_local *local = hw_to_local(hw);
 380         unsigned long flags;
 381
 382         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 383         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 384         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 385 }
 386
 387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 388 {
 389         ieee80211_stop_queue_by_reason(hw, queue,
 390                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 391                                        false);
 392 }
 393 EXPORT_SYMBOL(ieee80211_stop_queue);
 394
 395 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 396                                struct sk_buff *skb)
 397 {
 398         struct ieee80211_hw *hw = &local->hw;
 399         unsigned long flags;
 400         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 401         int queue = info->hw_queue;
 402
 403         if (WARN_ON(!info->control.vif)) {
 404                 ieee80211_free_txskb(&local->hw, skb);
 405                 return;
 406         }
 407
 408         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 409         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 410                                false);
 411         __skb_queue_tail(&local->pending[queue], skb);
 412         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 413                                false);
 414         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 415 }
 416
 417 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 418                                 struct sk_buff_head *skbs)
 419 {
 420         struct ieee80211_hw *hw = &local->hw;
 421         struct sk_buff *skb;
 422         unsigned long flags;
 423         int queue, i;
 424
 425         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 426         while ((skb = skb_dequeue(skbs))) {
 427                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 428
 429                 if (WARN_ON(!info->control.vif)) {
 430                         ieee80211_free_txskb(&local->hw, skb);
 431                         continue;
 432                 }
 433
 434                 queue = info->hw_queue;
 435
 436                 __ieee80211_stop_queue(hw, queue,
 437                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 438                                 false);
 439
 440                 __skb_queue_tail(&local->pending[queue], skb);
 441         }
 442
 443         for (i = 0; i < hw->queues; i++)
 444                 __ieee80211_wake_queue(hw, i,
 445                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 446                         false);
 447         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 448 }
 449
 450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 451                                      unsigned long queues,
 452                                      enum queue_stop_reason reason,
 453                                      bool refcounted)
 454 {
 455         struct ieee80211_local *local = hw_to_local(hw);
 456         unsigned long flags;
 457         int i;
 458
 459         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 460
 461         for_each_set_bit(i, &queues, hw->queues)
 462                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 463
 464         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 465 }
 466
 467 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 468 {
 469         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 470                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 471                                         false);
 472 }
 473 EXPORT_SYMBOL(ieee80211_stop_queues);
 474
 475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 476 {
 477         struct ieee80211_local *local = hw_to_local(hw);
 478         unsigned long flags;
 479         int ret;
 480
 481         if (WARN_ON(queue >= hw->queues))
 482                 return true;
 483
 484         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 485         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 486                        &local->queue_stop_reasons[queue]);
 487         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 488         return ret;
 489 }
 490 EXPORT_SYMBOL(ieee80211_queue_stopped);
 491
 492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 493                                      unsigned long queues,
 494                                      enum queue_stop_reason reason,
 495                                      bool refcounted)
 496 {
 497         struct ieee80211_local *local = hw_to_local(hw);
 498         unsigned long flags;
 499         int i;
 500
 501         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 502
 503         for_each_set_bit(i, &queues, hw->queues)
 504                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 505
 506         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 507 }
 508
 509 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 510 {
 511         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 512                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 513                                         false);
 514 }
 515 EXPORT_SYMBOL(ieee80211_wake_queues);
 516
 517 static unsigned int
 518 ieee80211_get_vif_queues(struct ieee80211_local *local,
 519                          struct ieee80211_sub_if_data *sdata)
 520 {
 521         unsigned int queues;
 522
 523         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 524                 int ac;
 525
 526                 queues = 0;
 527
 528                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 529                         queues |= BIT(sdata->vif.hw_queue[ac]);
 530                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 531                         queues |= BIT(sdata->vif.cab_queue);
 532         } else {
 533                 /* all queues */
 534                 queues = BIT(local->hw.queues) - 1;
 535         }
 536
 537         return queues;
 538 }
 539
 540 void __ieee80211_flush_queues(struct ieee80211_local *local,
 541                               struct ieee80211_sub_if_data *sdata,
 542                               unsigned int queues, bool drop)
 543 {
 544         if (!local->ops->flush)
 545                 return;
 546
 547         /*
 548          * If no queue was set, or if the HW doesn't support
 549          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 550          */
 551         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 552                 queues = ieee80211_get_vif_queues(local, sdata);
 553
 554         ieee80211_stop_queues_by_reason(&local->hw, queues,
 555                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 556                                         false);
 557
 558         drv_flush(local, sdata, queues, drop);
 559
 560         ieee80211_wake_queues_by_reason(&local->hw, queues,
 561                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 562                                         false);
 563 }
 564
 565 void ieee80211_flush_queues(struct ieee80211_local *local,
 566                             struct ieee80211_sub_if_data *sdata, bool drop)
 567 {
 568         __ieee80211_flush_queues(local, sdata, 0, drop);
 569 }
 570
 571 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 572                                struct ieee80211_sub_if_data *sdata,
 573                                enum queue_stop_reason reason)
 574 {
 575         ieee80211_stop_queues_by_reason(&local->hw,
 576                                         ieee80211_get_vif_queues(local, sdata),
 577                                         reason, true);
 578 }
 579
 580 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 581                                struct ieee80211_sub_if_data *sdata,
 582                                enum queue_stop_reason reason)
 583 {
 584         ieee80211_wake_queues_by_reason(&local->hw,
 585                                         ieee80211_get_vif_queues(local, sdata),
 586                                         reason, true);
 587 }
 588
 589 static void __iterate_interfaces(struct ieee80211_local *local,
 590                                  u32 iter_flags,
 591                                  void (*iterator)(void *data, u8 *mac,
 592                                                   struct ieee80211_vif *vif),
 593                                  void *data)
 594 {
 595         struct ieee80211_sub_if_data *sdata;
 596         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 597
 598         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 599                 switch (sdata->vif.type) {
 600                 case NL80211_IFTYPE_MONITOR:
 601                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 602                                 continue;
 603                         break;
 604                 case NL80211_IFTYPE_AP_VLAN:
 605                         continue;
 606                 default:
 607                         break;
 608                 }
 609                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 610                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 611                         continue;
 612                 if (ieee80211_sdata_running(sdata) || !active_only)
 613                         iterator(data, sdata->vif.addr,
 614                                  &sdata->vif);
 615         }
 616
 617         sdata = rcu_dereference_check(local->monitor_sdata,
 618                                       lockdep_is_held(&local->iflist_mtx) ||
 619                                       lockdep_rtnl_is_held());
 620         if (sdata &&
 621             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 622              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 623                 iterator(data, sdata->vif.addr, &sdata->vif);
 624 }
 625
 626 void ieee80211_iterate_interfaces(
 627         struct ieee80211_hw *hw, u32 iter_flags,
 628         void (*iterator)(void *data, u8 *mac,
 629                          struct ieee80211_vif *vif),
 630         void *data)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633
 634         mutex_lock(&local->iflist_mtx);
 635         __iterate_interfaces(local, iter_flags, iterator, data);
 636         mutex_unlock(&local->iflist_mtx);
 637 }
 638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 639
 640 void ieee80211_iterate_active_interfaces_atomic(
 641         struct ieee80211_hw *hw, u32 iter_flags,
 642         void (*iterator)(void *data, u8 *mac,
 643                          struct ieee80211_vif *vif),
 644         void *data)
 645 {
 646         struct ieee80211_local *local = hw_to_local(hw);
 647
 648         rcu_read_lock();
 649         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 650                              iterator, data);
 651         rcu_read_unlock();
 652 }
 653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 654
 655 void ieee80211_iterate_active_interfaces_rtnl(
 656         struct ieee80211_hw *hw, u32 iter_flags,
 657         void (*iterator)(void *data, u8 *mac,
 658                          struct ieee80211_vif *vif),
 659         void *data)
 660 {
 661         struct ieee80211_local *local = hw_to_local(hw);
 662
 663         ASSERT_RTNL();
 664
 665         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 666                              iterator, data);
 667 }
 668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 669
 670 static void __iterate_stations(struct ieee80211_local *local,
 671                                void (*iterator)(void *data,
 672                                                 struct ieee80211_sta *sta),
 673                                void *data)
 674 {
 675         struct sta_info *sta;
 676
 677         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 678                 if (!sta->uploaded)
 679                         continue;
 680
 681                 iterator(data, &sta->sta);
 682         }
 683 }
 684
 685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 686                         void (*iterator)(void *data,
 687                                          struct ieee80211_sta *sta),
 688                         void *data)
 689 {
 690         struct ieee80211_local *local = hw_to_local(hw);
 691
 692         rcu_read_lock();
 693         __iterate_stations(local, iterator, data);
 694         rcu_read_unlock();
 695 }
 696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 697
 698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 699 {
 700         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 701
 702         if (!ieee80211_sdata_running(sdata) ||
 703             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 704                 return NULL;
 705         return &sdata->vif;
 706 }
 707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 708
 709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 710 {
 711         struct ieee80211_sub_if_data *sdata;
 712
 713         if (!vif)
 714                 return NULL;
 715
 716         sdata = vif_to_sdata(vif);
 717
 718         if (!ieee80211_sdata_running(sdata) ||
 719             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 720                 return NULL;
 721
 722         return &sdata->wdev;
 723 }
 724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 725
 726 /*
 727  * Nothing should have been stuffed into the workqueue during
 728  * the suspend->resume cycle. Since we can't check each caller
 729  * of this function if we are already quiescing / suspended,
 730  * check here and don't WARN since this can actually happen when
 731  * the rx path (for example) is racing against __ieee80211_suspend
 732  * and suspending / quiescing was set after the rx path checked
 733  * them.
 734  */
 735 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 736 {
 737         if (local->quiescing || (local->suspended && !local->resuming)) {
 738                 pr_warn("queueing ieee80211 work while going to suspend\n");
 739                 return false;
 740         }
 741
 742         return true;
 743 }
 744
 745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 746 {
 747         struct ieee80211_local *local = hw_to_local(hw);
 748
 749         if (!ieee80211_can_queue_work(local))
 750                 return;
 751
 752         queue_work(local->workqueue, work);
 753 }
 754 EXPORT_SYMBOL(ieee80211_queue_work);
 755
 756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 757                                   struct delayed_work *dwork,
 758                                   unsigned long delay)
 759 {
 760         struct ieee80211_local *local = hw_to_local(hw);
 761
 762         if (!ieee80211_can_queue_work(local))
 763                 return;
 764
 765         queue_delayed_work(local->workqueue, dwork, delay);
 766 }
 767 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 768
 769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 770                                struct ieee802_11_elems *elems,
 771                                u64 filter, u32 crc)
 772 {
 773         size_t left = len;
 774         const u8 *pos = start;
 775         bool calc_crc = filter != 0;
 776         DECLARE_BITMAP(seen_elems, 256);
 777         const u8 *ie;
 778
 779         bitmap_zero(seen_elems, 256);
 780         memset(elems, 0, sizeof(*elems));
 781         elems->ie_start = start;
 782         elems->total_len = len;
 783
 784         while (left >= 2) {
 785                 u8 id, elen;
 786                 bool elem_parse_failed;
 787
 788                 id = *pos++;
 789                 elen = *pos++;
 790                 left -= 2;
 791
 792                 if (elen > left) {
 793                         elems->parse_error = true;
 794                         break;
 795                 }
 796
 797                 switch (id) {
 798                 case WLAN_EID_SSID:
 799                 case WLAN_EID_SUPP_RATES:
 800                 case WLAN_EID_FH_PARAMS:
 801                 case WLAN_EID_DS_PARAMS:
 802                 case WLAN_EID_CF_PARAMS:
 803                 case WLAN_EID_TIM:
 804                 case WLAN_EID_IBSS_PARAMS:
 805                 case WLAN_EID_CHALLENGE:
 806                 case WLAN_EID_RSN:
 807                 case WLAN_EID_ERP_INFO:
 808                 case WLAN_EID_EXT_SUPP_RATES:
 809                 case WLAN_EID_HT_CAPABILITY:
 810                 case WLAN_EID_HT_OPERATION:
 811                 case WLAN_EID_VHT_CAPABILITY:
 812                 case WLAN_EID_VHT_OPERATION:
 813                 case WLAN_EID_MESH_ID:
 814                 case WLAN_EID_MESH_CONFIG:
 815                 case WLAN_EID_PEER_MGMT:
 816                 case WLAN_EID_PREQ:
 817                 case WLAN_EID_PREP:
 818                 case WLAN_EID_PERR:
 819                 case WLAN_EID_RANN:
 820                 case WLAN_EID_CHANNEL_SWITCH:
 821                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 822                 case WLAN_EID_COUNTRY:
 823                 case WLAN_EID_PWR_CONSTRAINT:
 824                 case WLAN_EID_TIMEOUT_INTERVAL:
 825                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 826                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 827                 case WLAN_EID_CHAN_SWITCH_PARAM:
 828                 case WLAN_EID_EXT_CAPABILITY:
 829                 case WLAN_EID_CHAN_SWITCH_TIMING:
 830                 case WLAN_EID_LINK_ID:
 831                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 832                 /*
 833                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 834                  * that if the content gets bigger it might be needed more than once
 835                  */
 836                         if (test_bit(id, seen_elems)) {
 837                                 elems->parse_error = true;
 838                                 left -= elen;
 839                                 pos += elen;
 840                                 continue;
 841                         }
 842                         break;
 843                 }
 844
 845                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 846                         crc = crc32_be(crc, pos - 2, elen + 2);
 847
 848                 elem_parse_failed = false;
 849
 850                 switch (id) {
 851                 case WLAN_EID_LINK_ID:
 852                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 853                                 elem_parse_failed = true;
 854                                 break;
 855                         }
 856                         elems->lnk_id = (void *)(pos - 2);
 857                         break;
 858                 case WLAN_EID_CHAN_SWITCH_TIMING:
 859                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 860                                 elem_parse_failed = true;
 861                                 break;
 862                         }
 863                         elems->ch_sw_timing = (void *)pos;
 864                         break;
 865                 case WLAN_EID_EXT_CAPABILITY:
 866                         elems->ext_capab = pos;
 867                         elems->ext_capab_len = elen;
 868                         break;
 869                 case WLAN_EID_SSID:
 870                         elems->ssid = pos;
 871                         elems->ssid_len = elen;
 872                         break;
 873                 case WLAN_EID_SUPP_RATES:
 874                         elems->supp_rates = pos;
 875                         elems->supp_rates_len = elen;
 876                         break;
 877                 case WLAN_EID_DS_PARAMS:
 878                         if (elen >= 1)
 879                                 elems->ds_params = pos;
 880                         else
 881                                 elem_parse_failed = true;
 882                         break;
 883                 case WLAN_EID_TIM:
 884                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 885                                 elems->tim = (void *)pos;
 886                                 elems->tim_len = elen;
 887                         } else
 888                                 elem_parse_failed = true;
 889                         break;
 890                 case WLAN_EID_CHALLENGE:
 891                         elems->challenge = pos;
 892                         elems->challenge_len = elen;
 893                         break;
 894                 case WLAN_EID_VENDOR_SPECIFIC:
 895                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 896                             pos[2] == 0xf2) {
 897                                 /* Microsoft OUI (00:50:F2) */
 898
 899                                 if (calc_crc)
 900                                         crc = crc32_be(crc, pos - 2, elen + 2);
 901
 902                                 if (elen >= 5 && pos[3] == 2) {
 903                                         /* OUI Type 2 - WMM IE */
 904                                         if (pos[4] == 0) {
 905                                                 elems->wmm_info = pos;
 906                                                 elems->wmm_info_len = elen;
 907                                         } else if (pos[4] == 1) {
 908                                                 elems->wmm_param = pos;
 909                                                 elems->wmm_param_len = elen;
 910                                         }
 911                                 }
 912                         }
 913                         break;
 914                 case WLAN_EID_RSN:
 915                         elems->rsn = pos;
 916                         elems->rsn_len = elen;
 917                         break;
 918                 case WLAN_EID_ERP_INFO:
 919                         if (elen >= 1)
 920                                 elems->erp_info = pos;
 921                         else
 922                                 elem_parse_failed = true;
 923                         break;
 924                 case WLAN_EID_EXT_SUPP_RATES:
 925                         elems->ext_supp_rates = pos;
 926                         elems->ext_supp_rates_len = elen;
 927                         break;
 928                 case WLAN_EID_HT_CAPABILITY:
 929                         if (elen >= sizeof(struct ieee80211_ht_cap))
 930                                 elems->ht_cap_elem = (void *)pos;
 931                         else
 932                                 elem_parse_failed = true;
 933                         break;
 934                 case WLAN_EID_HT_OPERATION:
 935                         if (elen >= sizeof(struct ieee80211_ht_operation))
 936                                 elems->ht_operation = (void *)pos;
 937                         else
 938                                 elem_parse_failed = true;
 939                         break;
 940                 case WLAN_EID_VHT_CAPABILITY:
 941                         if (elen >= sizeof(struct ieee80211_vht_cap))
 942                                 elems->vht_cap_elem = (void *)pos;
 943                         else
 944                                 elem_parse_failed = true;
 945                         break;
 946                 case WLAN_EID_VHT_OPERATION:
 947                         if (elen >= sizeof(struct ieee80211_vht_operation))
 948                                 elems->vht_operation = (void *)pos;
 949                         else
 950                                 elem_parse_failed = true;
 951                         break;
 952                 case WLAN_EID_OPMODE_NOTIF:
 953                         if (elen > 0)
 954                                 elems->opmode_notif = pos;
 955                         else
 956                                 elem_parse_failed = true;
 957                         break;
 958                 case WLAN_EID_MESH_ID:
 959                         elems->mesh_id = pos;
 960                         elems->mesh_id_len = elen;
 961                         break;
 962                 case WLAN_EID_MESH_CONFIG:
 963                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 964                                 elems->mesh_config = (void *)pos;
 965                         else
 966                                 elem_parse_failed = true;
 967                         break;
 968                 case WLAN_EID_PEER_MGMT:
 969                         elems->peering = pos;
 970                         elems->peering_len = elen;
 971                         break;
 972                 case WLAN_EID_MESH_AWAKE_WINDOW:
 973                         if (elen >= 2)
 974                                 elems->awake_window = (void *)pos;
 975                         break;
 976                 case WLAN_EID_PREQ:
 977                         elems->preq = pos;
 978                         elems->preq_len = elen;
 979                         break;
 980                 case WLAN_EID_PREP:
 981                         elems->prep = pos;
 982                         elems->prep_len = elen;
 983                         break;
 984                 case WLAN_EID_PERR:
 985                         elems->perr = pos;
 986                         elems->perr_len = elen;
 987                         break;
 988                 case WLAN_EID_RANN:
 989                         if (elen >= sizeof(struct ieee80211_rann_ie))
 990                                 elems->rann = (void *)pos;
 991                         else
 992                                 elem_parse_failed = true;
 993                         break;
 994                 case WLAN_EID_CHANNEL_SWITCH:
 995                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 996                                 elem_parse_failed = true;
 997                                 break;
 998                         }
 999                         elems->ch_switch_ie = (void *)pos;
1000                         break;
1001                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1002                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1003                                 elem_parse_failed = true;
1004                                 break;
1005                         }
1006                         elems->ext_chansw_ie = (void *)pos;
1007                         break;
1008                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1009                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1010                                 elem_parse_failed = true;
1011                                 break;
1012                         }
1013                         elems->sec_chan_offs = (void *)pos;
1014                         break;
1015                 case WLAN_EID_CHAN_SWITCH_PARAM:
1016                         if (elen !=
1017                             sizeof(*elems->mesh_chansw_params_ie)) {
1018                                 elem_parse_failed = true;
1019                                 break;
1020                         }
1021                         elems->mesh_chansw_params_ie = (void *)pos;
1022                         break;
1023                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1024                         if (!action ||
1025                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1026                                 elem_parse_failed = true;
1027                                 break;
1028                         }
1029                         elems->wide_bw_chansw_ie = (void *)pos;
1030                         break;
1031                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1032                         if (action) {
1033                                 elem_parse_failed = true;
1034                                 break;
1035                         }
1036                         /*
1037                          * This is a bit tricky, but as we only care about
1038                          * the wide bandwidth channel switch element, so
1039                          * just parse it out manually.
1040                          */
1041                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1042                                               pos, elen);
1043                         if (ie) {
1044                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1045                                         elems->wide_bw_chansw_ie =
1046                                                 (void *)(ie + 2);
1047                                 else
1048                                         elem_parse_failed = true;
1049                         }
1050                         break;
1051                 case WLAN_EID_COUNTRY:
1052                         elems->country_elem = pos;
1053                         elems->country_elem_len = elen;
1054                         break;
1055                 case WLAN_EID_PWR_CONSTRAINT:
1056                         if (elen != 1) {
1057                                 elem_parse_failed = true;
1058                                 break;
1059                         }
1060                         elems->pwr_constr_elem = pos;
1061                         break;
1062                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1063                         /* Lots of different options exist, but we only care
1064                          * about the Dynamic Transmit Power Control element.
1065                          * First check for the Cisco OUI, then for the DTPC
1066                          * tag (0x00).
1067                          */
1068                         if (elen < 4) {
1069                                 elem_parse_failed = true;
1070                                 break;
1071                         }
1072
1073                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1074                             pos[2] != 0x96 || pos[3] != 0x00)
1075                                 break;
1076
1077                         if (elen != 6) {
1078                                 elem_parse_failed = true;
1079                                 break;
1080                         }
1081
1082                         if (calc_crc)
1083                                 crc = crc32_be(crc, pos - 2, elen + 2);
1084
1085                         elems->cisco_dtpc_elem = pos;
1086                         break;
1087                 case WLAN_EID_TIMEOUT_INTERVAL:
1088                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1089                                 elems->timeout_int = (void *)pos;
1090                         else
1091                                 elem_parse_failed = true;
1092                         break;
1093                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1094                         if (elen >= sizeof(*elems->max_idle_period_ie))
1095                                 elems->max_idle_period_ie = (void *)pos;
1096                         break;
1097                 default:
1098                         break;
1099                 }
1100
1101                 if (elem_parse_failed)
1102                         elems->parse_error = true;
1103                 else
1104                         __set_bit(id, seen_elems);
1105
1106                 left -= elen;
1107                 pos += elen;
1108         }
1109
1110         if (left != 0)
1111                 elems->parse_error = true;
1112
1113         return crc;
1114 }
1115
1116 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1117                                bool bss_notify, bool enable_qos)
1118 {
1119         struct ieee80211_local *local = sdata->local;
1120         struct ieee80211_tx_queue_params qparam;
1121         struct ieee80211_chanctx_conf *chanctx_conf;
1122         int ac;
1123         bool use_11b;
1124         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1125         int aCWmin, aCWmax;
1126
1127         if (!local->ops->conf_tx)
1128                 return;
1129
1130         if (local->hw.queues < IEEE80211_NUM_ACS)
1131                 return;
1132
1133         memset(&qparam, 0, sizeof(qparam));
1134
1135         rcu_read_lock();
1136         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1137         use_11b = (chanctx_conf &&
1138                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1139                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1140         rcu_read_unlock();
1141
1142         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1143
1144         /* Set defaults according to 802.11-2007 Table 7-37 */
1145         aCWmax = 1023;
1146         if (use_11b)
1147                 aCWmin = 31;
1148         else
1149                 aCWmin = 15;
1150
1151         /* Confiure old 802.11b/g medium access rules. */
1152         qparam.cw_max = aCWmax;
1153         qparam.cw_min = aCWmin;
1154         qparam.txop = 0;
1155         qparam.aifs = 2;
1156
1157         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1158                 /* Update if QoS is enabled. */
1159                 if (enable_qos) {
1160                         switch (ac) {
1161                         case IEEE80211_AC_BK:
1162                                 qparam.cw_max = aCWmax;
1163                                 qparam.cw_min = aCWmin;
1164                                 qparam.txop = 0;
1165                                 if (is_ocb)
1166                                         qparam.aifs = 9;
1167                                 else
1168                                         qparam.aifs = 7;
1169                                 break;
1170                         /* never happens but let's not leave undefined */
1171                         default:
1172                         case IEEE80211_AC_BE:
1173                                 qparam.cw_max = aCWmax;
1174                                 qparam.cw_min = aCWmin;
1175                                 qparam.txop = 0;
1176                                 if (is_ocb)
1177                                         qparam.aifs = 6;
1178                                 else
1179                                         qparam.aifs = 3;
1180                                 break;
1181                         case IEEE80211_AC_VI:
1182                                 qparam.cw_max = aCWmin;
1183                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1184                                 if (is_ocb)
1185                                         qparam.txop = 0;
1186                                 else if (use_11b)
1187                                         qparam.txop = 6016/32;
1188                                 else
1189                                         qparam.txop = 3008/32;
1190
1191                                 if (is_ocb)
1192                                         qparam.aifs = 3;
1193                                 else
1194                                         qparam.aifs = 2;
1195                                 break;
1196                         case IEEE80211_AC_VO:
1197                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1198                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1199                                 if (is_ocb)
1200                                         qparam.txop = 0;
1201                                 else if (use_11b)
1202                                         qparam.txop = 3264/32;
1203                                 else
1204                                         qparam.txop = 1504/32;
1205                                 qparam.aifs = 2;
1206                                 break;
1207                         }
1208                 }
1209
1210                 qparam.uapsd = false;
1211
1212                 sdata->tx_conf[ac] = qparam;
1213                 drv_conf_tx(local, sdata, ac, &qparam);
1214         }
1215
1216         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1217             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1218             sdata->vif.type != NL80211_IFTYPE_NAN) {
1219                 sdata->vif.bss_conf.qos = enable_qos;
1220                 if (bss_notify)
1221                         ieee80211_bss_info_change_notify(sdata,
1222                                                          BSS_CHANGED_QOS);
1223         }
1224 }
1225
1226 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1227                          u16 transaction, u16 auth_alg, u16 status,
1228                          const u8 *extra, size_t extra_len, const u8 *da,
1229                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1230                          u32 tx_flags)
1231 {
1232         struct ieee80211_local *local = sdata->local;
1233         struct sk_buff *skb;
1234         struct ieee80211_mgmt *mgmt;
1235         int err;
1236
1237         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1238         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1239                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1240         if (!skb)
1241                 return;
1242
1243         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1244
1245         mgmt = skb_put_zero(skb, 24 + 6);
1246         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1247                                           IEEE80211_STYPE_AUTH);
1248         memcpy(mgmt->da, da, ETH_ALEN);
1249         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1250         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1251         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1252         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1253         mgmt->u.auth.status_code = cpu_to_le16(status);
1254         if (extra)
1255                 skb_put_data(skb, extra, extra_len);
1256
1257         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1258                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1259                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1260                 WARN_ON(err);
1261         }
1262
1263         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1264                                         tx_flags;
1265         ieee80211_tx_skb(sdata, skb);
1266 }
1267
1268 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1269                                     const u8 *bssid, u16 stype, u16 reason,
1270                                     bool send_frame, u8 *frame_buf)
1271 {
1272         struct ieee80211_local *local = sdata->local;
1273         struct sk_buff *skb;
1274         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1275
1276         /* build frame */
1277         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1278         mgmt->duration = 0; /* initialize only */
1279         mgmt->seq_ctrl = 0; /* initialize only */
1280         memcpy(mgmt->da, bssid, ETH_ALEN);
1281         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1282         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1283         /* u.deauth.reason_code == u.disassoc.reason_code */
1284         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1285
1286         if (send_frame) {
1287                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1288                                     IEEE80211_DEAUTH_FRAME_LEN);
1289                 if (!skb)
1290                         return;
1291
1292                 skb_reserve(skb, local->hw.extra_tx_headroom);
1293
1294                 /* copy in frame */
1295                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1296
1297                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1298                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1299                         IEEE80211_SKB_CB(skb)->flags |=
1300                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1301
1302                 ieee80211_tx_skb(sdata, skb);
1303         }
1304 }
1305
1306 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1307                                          u8 *buffer, size_t buffer_len,
1308                                          const u8 *ie, size_t ie_len,
1309                                          enum nl80211_band band,
1310                                          u32 rate_mask,
1311                                          struct cfg80211_chan_def *chandef,
1312                                          size_t *offset)
1313 {
1314         struct ieee80211_supported_band *sband;
1315         u8 *pos = buffer, *end = buffer + buffer_len;
1316         size_t noffset;
1317         int supp_rates_len, i;
1318         u8 rates[32];
1319         int num_rates;
1320         int ext_rates_len;
1321         int shift;
1322         u32 rate_flags;
1323         bool have_80mhz = false;
1324
1325         *offset = 0;
1326
1327         sband = local->hw.wiphy->bands[band];
1328         if (WARN_ON_ONCE(!sband))
1329                 return 0;
1330
1331         rate_flags = ieee80211_chandef_rate_flags(chandef);
1332         shift = ieee80211_chandef_get_shift(chandef);
1333
1334         num_rates = 0;
1335         for (i = 0; i < sband->n_bitrates; i++) {
1336                 if ((BIT(i) & rate_mask) == 0)
1337                         continue; /* skip rate */
1338                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1339                         continue;
1340
1341                 rates[num_rates++] =
1342                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1343                                           (1 << shift) * 5);
1344         }
1345
1346         supp_rates_len = min_t(int, num_rates, 8);
1347
1348         if (end - pos < 2 + supp_rates_len)
1349                 goto out_err;
1350         *pos++ = WLAN_EID_SUPP_RATES;
1351         *pos++ = supp_rates_len;
1352         memcpy(pos, rates, supp_rates_len);
1353         pos += supp_rates_len;
1354
1355         /* insert "request information" if in custom IEs */
1356         if (ie && ie_len) {
1357                 static const u8 before_extrates[] = {
1358                         WLAN_EID_SSID,
1359                         WLAN_EID_SUPP_RATES,
1360                         WLAN_EID_REQUEST,
1361                 };
1362                 noffset = ieee80211_ie_split(ie, ie_len,
1363                                              before_extrates,
1364                                              ARRAY_SIZE(before_extrates),
1365                                              *offset);
1366                 if (end - pos < noffset - *offset)
1367                         goto out_err;
1368                 memcpy(pos, ie + *offset, noffset - *offset);
1369                 pos += noffset - *offset;
1370                 *offset = noffset;
1371         }
1372
1373         ext_rates_len = num_rates - supp_rates_len;
1374         if (ext_rates_len > 0) {
1375                 if (end - pos < 2 + ext_rates_len)
1376                         goto out_err;
1377                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1378                 *pos++ = ext_rates_len;
1379                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1380                 pos += ext_rates_len;
1381         }
1382
1383         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1384                 if (end - pos < 3)
1385                         goto out_err;
1386                 *pos++ = WLAN_EID_DS_PARAMS;
1387                 *pos++ = 1;
1388                 *pos++ = ieee80211_frequency_to_channel(
1389                                 chandef->chan->center_freq);
1390         }
1391
1392         /* insert custom IEs that go before HT */
1393         if (ie && ie_len) {
1394                 static const u8 before_ht[] = {
1395                         /*
1396                          * no need to list the ones split off already
1397                          * (or generated here)
1398                          */
1399                         WLAN_EID_DS_PARAMS,
1400                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1401                 };
1402                 noffset = ieee80211_ie_split(ie, ie_len,
1403                                              before_ht, ARRAY_SIZE(before_ht),
1404                                              *offset);
1405                 if (end - pos < noffset - *offset)
1406                         goto out_err;
1407                 memcpy(pos, ie + *offset, noffset - *offset);
1408                 pos += noffset - *offset;
1409                 *offset = noffset;
1410         }
1411
1412         if (sband->ht_cap.ht_supported) {
1413                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1414                         goto out_err;
1415                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1416                                                 sband->ht_cap.cap);
1417         }
1418
1419         /*
1420          * If adding more here, adjust code in main.c
1421          * that calculates local->scan_ies_len.
1422          */
1423
1424         /* insert custom IEs that go before VHT */
1425         if (ie && ie_len) {
1426                 static const u8 before_vht[] = {
1427                         /*
1428                          * no need to list the ones split off already
1429                          * (or generated here)
1430                          */
1431                         WLAN_EID_BSS_COEX_2040,
1432                         WLAN_EID_EXT_CAPABILITY,
1433                         WLAN_EID_SSID_LIST,
1434                         WLAN_EID_CHANNEL_USAGE,
1435                         WLAN_EID_INTERWORKING,
1436                         WLAN_EID_MESH_ID,
1437                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1438                 };
1439                 noffset = ieee80211_ie_split(ie, ie_len,
1440                                              before_vht, ARRAY_SIZE(before_vht),
1441                                              *offset);
1442                 if (end - pos < noffset - *offset)
1443                         goto out_err;
1444                 memcpy(pos, ie + *offset, noffset - *offset);
1445                 pos += noffset - *offset;
1446                 *offset = noffset;
1447         }
1448
1449         /* Check if any channel in this sband supports at least 80 MHz */
1450         for (i = 0; i < sband->n_channels; i++) {
1451                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1452                                                 IEEE80211_CHAN_NO_80MHZ))
1453                         continue;
1454
1455                 have_80mhz = true;
1456                 break;
1457         }
1458
1459         if (sband->vht_cap.vht_supported && have_80mhz) {
1460                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1461                         goto out_err;
1462                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1463                                                  sband->vht_cap.cap);
1464         }
1465
1466         return pos - buffer;
1467  out_err:
1468         WARN_ONCE(1, "not enough space for preq IEs\n");
1469         return pos - buffer;
1470 }
1471
1472 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1473                              size_t buffer_len,
1474                              struct ieee80211_scan_ies *ie_desc,
1475                              const u8 *ie, size_t ie_len,
1476                              u8 bands_used, u32 *rate_masks,
1477                              struct cfg80211_chan_def *chandef)
1478 {
1479         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1480         int i;
1481
1482         memset(ie_desc, 0, sizeof(*ie_desc));
1483
1484         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1485                 if (bands_used & BIT(i)) {
1486                         pos += ieee80211_build_preq_ies_band(local,
1487                                                              buffer + pos,
1488                                                              buffer_len - pos,
1489                                                              ie, ie_len, i,
1490                                                              rate_masks[i],
1491                                                              chandef,
1492                                                              &custom_ie_offset);
1493                         ie_desc->ies[i] = buffer + old_pos;
1494                         ie_desc->len[i] = pos - old_pos;
1495                         old_pos = pos;
1496                 }
1497         }
1498
1499         /* add any remaining custom IEs */
1500         if (ie && ie_len) {
1501                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1502                               "not enough space for preq custom IEs\n"))
1503                         return pos;
1504                 memcpy(buffer + pos, ie + custom_ie_offset,
1505                        ie_len - custom_ie_offset);
1506                 ie_desc->common_ies = buffer + pos;
1507                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1508                 pos += ie_len - custom_ie_offset;
1509         }
1510
1511         return pos;
1512 };
1513
1514 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1515                                           const u8 *src, const u8 *dst,
1516                                           u32 ratemask,
1517                                           struct ieee80211_channel *chan,
1518                                           const u8 *ssid, size_t ssid_len,
1519                                           const u8 *ie, size_t ie_len,
1520                                           bool directed)
1521 {
1522         struct ieee80211_local *local = sdata->local;
1523         struct cfg80211_chan_def chandef;
1524         struct sk_buff *skb;
1525         struct ieee80211_mgmt *mgmt;
1526         int ies_len;
1527         u32 rate_masks[NUM_NL80211_BANDS] = {};
1528         struct ieee80211_scan_ies dummy_ie_desc;
1529
1530         /*
1531          * Do not send DS Channel parameter for directed probe requests
1532          * in order to maximize the chance that we get a response.  Some
1533          * badly-behaved APs don't respond when this parameter is included.
1534          */
1535         chandef.width = sdata->vif.bss_conf.chandef.width;
1536         if (directed)
1537                 chandef.chan = NULL;
1538         else
1539                 chandef.chan = chan;
1540
1541         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1542                                      100 + ie_len);
1543         if (!skb)
1544                 return NULL;
1545
1546         rate_masks[chan->band] = ratemask;
1547         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1548                                            skb_tailroom(skb), &dummy_ie_desc,
1549                                            ie, ie_len, BIT(chan->band),
1550                                            rate_masks, &chandef);
1551         skb_put(skb, ies_len);
1552
1553         if (dst) {
1554                 mgmt = (struct ieee80211_mgmt *) skb->data;
1555                 memcpy(mgmt->da, dst, ETH_ALEN);
1556                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1557         }
1558
1559         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1560
1561         return skb;
1562 }
1563
1564 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1565                               const u8 *src, const u8 *dst,
1566                               const u8 *ssid, size_t ssid_len,
1567                               const u8 *ie, size_t ie_len,
1568                               u32 ratemask, bool directed, u32 tx_flags,
1569                               struct ieee80211_channel *channel, bool scan)
1570 {
1571         struct sk_buff *skb;
1572
1573         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1574                                         ssid, ssid_len,
1575                                         ie, ie_len, directed);
1576         if (skb) {
1577                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1578                 if (scan)
1579                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1580                 else
1581                         ieee80211_tx_skb(sdata, skb);
1582         }
1583 }
1584
1585 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1586                             struct ieee802_11_elems *elems,
1587                             enum nl80211_band band, u32 *basic_rates)
1588 {
1589         struct ieee80211_supported_band *sband;
1590         size_t num_rates;
1591         u32 supp_rates, rate_flags;
1592         int i, j, shift;
1593
1594         sband = sdata->local->hw.wiphy->bands[band];
1595         if (WARN_ON(!sband))
1596                 return 1;
1597
1598         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1599         shift = ieee80211_vif_get_shift(&sdata->vif);
1600
1601         num_rates = sband->n_bitrates;
1602         supp_rates = 0;
1603         for (i = 0; i < elems->supp_rates_len +
1604                      elems->ext_supp_rates_len; i++) {
1605                 u8 rate = 0;
1606                 int own_rate;
1607                 bool is_basic;
1608                 if (i < elems->supp_rates_len)
1609                         rate = elems->supp_rates[i];
1610                 else if (elems->ext_supp_rates)
1611                         rate = elems->ext_supp_rates
1612                                 [i - elems->supp_rates_len];
1613                 own_rate = 5 * (rate & 0x7f);
1614                 is_basic = !!(rate & 0x80);
1615
1616                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1617                         continue;
1618
1619                 for (j = 0; j < num_rates; j++) {
1620                         int brate;
1621                         if ((rate_flags & sband->bitrates[j].flags)
1622                             != rate_flags)
1623                                 continue;
1624
1625                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1626                                              1 << shift);
1627
1628                         if (brate == own_rate) {
1629                                 supp_rates |= BIT(j);
1630                                 if (basic_rates && is_basic)
1631                                         *basic_rates |= BIT(j);
1632                         }
1633                 }
1634         }
1635         return supp_rates;
1636 }
1637
1638 void ieee80211_stop_device(struct ieee80211_local *local)
1639 {
1640         ieee80211_led_radio(local, false);
1641         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1642
1643         cancel_work_sync(&local->reconfig_filter);
1644
1645         flush_workqueue(local->workqueue);
1646         drv_stop(local);
1647 }
1648
1649 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1650                                            bool aborted)
1651 {
1652         /* It's possible that we don't handle the scan completion in
1653          * time during suspend, so if it's still marked as completed
1654          * here, queue the work and flush it to clean things up.
1655          * Instead of calling the worker function directly here, we
1656          * really queue it to avoid potential races with other flows
1657          * scheduling the same work.
1658          */
1659         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1660                 /* If coming from reconfiguration failure, abort the scan so
1661                  * we don't attempt to continue a partial HW scan - which is
1662                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1663                  * completed scan, and a 5 GHz portion is still pending.
1664                  */
1665                 if (aborted)
1666                         set_bit(SCAN_ABORTED, &local->scanning);
1667                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1668                 flush_delayed_work(&local->scan_work);
1669         }
1670 }
1671
1672 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1673 {
1674         struct ieee80211_sub_if_data *sdata;
1675         struct ieee80211_chanctx *ctx;
1676
1677         /*
1678          * We get here if during resume the device can't be restarted properly.
1679          * We might also get here if this happens during HW reset, which is a
1680          * slightly different situation and we need to drop all connections in
1681          * the latter case.
1682          *
1683          * Ask cfg80211 to turn off all interfaces, this will result in more
1684          * warnings but at least we'll then get into a clean stopped state.
1685          */
1686
1687         local->resuming = false;
1688         local->suspended = false;
1689         local->in_reconfig = false;
1690
1691         ieee80211_flush_completed_scan(local, true);
1692
1693         /* scheduled scan clearly can't be running any more, but tell
1694          * cfg80211 and clear local state
1695          */
1696         ieee80211_sched_scan_end(local);
1697
1698         list_for_each_entry(sdata, &local->interfaces, list)
1699                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1700
1701         /* Mark channel contexts as not being in the driver any more to avoid
1702          * removing them from the driver during the shutdown process...
1703          */
1704         mutex_lock(&local->chanctx_mtx);
1705         list_for_each_entry(ctx, &local->chanctx_list, list)
1706                 ctx->driver_present = false;
1707         mutex_unlock(&local->chanctx_mtx);
1708
1709         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1710 }
1711
1712 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1713                                      struct ieee80211_sub_if_data *sdata)
1714 {
1715         struct ieee80211_chanctx_conf *conf;
1716         struct ieee80211_chanctx *ctx;
1717
1718         if (!local->use_chanctx)
1719                 return;
1720
1721         mutex_lock(&local->chanctx_mtx);
1722         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1723                                          lockdep_is_held(&local->chanctx_mtx));
1724         if (conf) {
1725                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1726                 drv_assign_vif_chanctx(local, sdata, ctx);
1727         }
1728         mutex_unlock(&local->chanctx_mtx);
1729 }
1730
1731 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1732 {
1733         struct ieee80211_local *local = sdata->local;
1734         struct sta_info *sta;
1735
1736         /* add STAs back */
1737         mutex_lock(&local->sta_mtx);
1738         list_for_each_entry(sta, &local->sta_list, list) {
1739                 enum ieee80211_sta_state state;
1740
1741                 if (!sta->uploaded || sta->sdata != sdata)
1742                         continue;
1743
1744                 for (state = IEEE80211_STA_NOTEXIST;
1745                      state < sta->sta_state; state++)
1746                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1747                                               state + 1));
1748         }
1749         mutex_unlock(&local->sta_mtx);
1750 }
1751
1752 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1753 {
1754         struct cfg80211_nan_func *func, **funcs;
1755         int res, id, i = 0;
1756
1757         res = drv_start_nan(sdata->local, sdata,
1758                             &sdata->u.nan.conf);
1759         if (WARN_ON(res))
1760                 return res;
1761
1762         funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1763                         sizeof(*funcs), GFP_KERNEL);
1764         if (!funcs)
1765                 return -ENOMEM;
1766
1767         /* Add all the functions:
1768          * This is a little bit ugly. We need to call a potentially sleeping
1769          * callback for each NAN function, so we can't hold the spinlock.
1770          */
1771         spin_lock_bh(&sdata->u.nan.func_lock);
1772
1773         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1774                 funcs[i++] = func;
1775
1776         spin_unlock_bh(&sdata->u.nan.func_lock);
1777
1778         for (i = 0; funcs[i]; i++) {
1779                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1780                 if (WARN_ON(res))
1781                         ieee80211_nan_func_terminated(&sdata->vif,
1782                                                       funcs[i]->instance_id,
1783                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1784                                                       GFP_KERNEL);
1785         }
1786
1787         kfree(funcs);
1788
1789         return 0;
1790 }
1791
1792 int ieee80211_reconfig(struct ieee80211_local *local)
1793 {
1794         struct ieee80211_hw *hw = &local->hw;
1795         struct ieee80211_sub_if_data *sdata;
1796         struct ieee80211_chanctx *ctx;
1797         struct sta_info *sta;
1798         int res, i;
1799         bool reconfig_due_to_wowlan = false;
1800         struct ieee80211_sub_if_data *sched_scan_sdata;
1801         struct cfg80211_sched_scan_request *sched_scan_req;
1802         bool sched_scan_stopped = false;
1803         bool suspended = local->suspended;
1804
1805         /* nothing to do if HW shouldn't run */
1806         if (!local->open_count)
1807                 goto wake_up;
1808
1809 #ifdef CONFIG_PM
1810         if (suspended)
1811                 local->resuming = true;
1812
1813         if (local->wowlan) {
1814                 /*
1815                  * In the wowlan case, both mac80211 and the device
1816                  * are functional when the resume op is called, so
1817                  * clear local->suspended so the device could operate
1818                  * normally (e.g. pass rx frames).
1819                  */
1820                 local->suspended = false;
1821                 res = drv_resume(local);
1822                 local->wowlan = false;
1823                 if (res < 0) {
1824                         local->resuming = false;
1825                         return res;
1826                 }
1827                 if (res == 0)
1828                         goto wake_up;
1829                 WARN_ON(res > 1);
1830                 /*
1831                  * res is 1, which means the driver requested
1832                  * to go through a regular reset on wakeup.
1833                  * restore local->suspended in this case.
1834                  */
1835                 reconfig_due_to_wowlan = true;
1836                 local->suspended = true;
1837         }
1838 #endif
1839
1840         /*
1841          * In case of hw_restart during suspend (without wowlan),
1842          * cancel restart work, as we are reconfiguring the device
1843          * anyway.
1844          * Note that restart_work is scheduled on a frozen workqueue,
1845          * so we can't deadlock in this case.
1846          */
1847         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1848                 cancel_work_sync(&local->restart_work);
1849
1850         local->started = false;
1851
1852         /*
1853          * Upon resume hardware can sometimes be goofy due to
1854          * various platform / driver / bus issues, so restarting
1855          * the device may at times not work immediately. Propagate
1856          * the error.
1857          */
1858         res = drv_start(local);
1859         if (res) {
1860                 if (suspended)
1861                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1862                 else
1863                         WARN(1, "Hardware became unavailable during restart.\n");
1864                 ieee80211_handle_reconfig_failure(local);
1865                 return res;
1866         }
1867
1868         /* setup fragmentation threshold */
1869         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1870
1871         /* setup RTS threshold */
1872         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1873
1874         /* reset coverage class */
1875         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1876
1877         ieee80211_led_radio(local, true);
1878         ieee80211_mod_tpt_led_trig(local,
1879                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1880
1881         /* add interfaces */
1882         sdata = rtnl_dereference(local->monitor_sdata);
1883         if (sdata) {
1884                 /* in HW restart it exists already */
1885                 WARN_ON(local->resuming);
1886                 res = drv_add_interface(local, sdata);
1887                 if (WARN_ON(res)) {
1888                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1889                         synchronize_net();
1890                         kfree(sdata);
1891                 }
1892         }
1893
1894         list_for_each_entry(sdata, &local->interfaces, list) {
1895                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1896                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1897                     ieee80211_sdata_running(sdata)) {
1898                         res = drv_add_interface(local, sdata);
1899                         if (WARN_ON(res))
1900                                 break;
1901                 }
1902         }
1903
1904         /* If adding any of the interfaces failed above, roll back and
1905          * report failure.
1906          */
1907         if (res) {
1908                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1909                                                      list)
1910                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1911                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1912                             ieee80211_sdata_running(sdata))
1913                                 drv_remove_interface(local, sdata);
1914                 ieee80211_handle_reconfig_failure(local);
1915                 return res;
1916         }
1917
1918         /* add channel contexts */
1919         if (local->use_chanctx) {
1920                 mutex_lock(&local->chanctx_mtx);
1921                 list_for_each_entry(ctx, &local->chanctx_list, list)
1922                         if (ctx->replace_state !=
1923                             IEEE80211_CHANCTX_REPLACES_OTHER)
1924                                 WARN_ON(drv_add_chanctx(local, ctx));
1925                 mutex_unlock(&local->chanctx_mtx);
1926
1927                 sdata = rtnl_dereference(local->monitor_sdata);
1928                 if (sdata && ieee80211_sdata_running(sdata))
1929                         ieee80211_assign_chanctx(local, sdata);
1930         }
1931
1932         /* reconfigure hardware */
1933         ieee80211_hw_config(local, ~0);
1934
1935         ieee80211_configure_filter(local);
1936
1937         /* Finally also reconfigure all the BSS information */
1938         list_for_each_entry(sdata, &local->interfaces, list) {
1939                 u32 changed;
1940
1941                 if (!ieee80211_sdata_running(sdata))
1942                         continue;
1943
1944                 ieee80211_assign_chanctx(local, sdata);
1945
1946                 switch (sdata->vif.type) {
1947                 case NL80211_IFTYPE_AP_VLAN:
1948                 case NL80211_IFTYPE_MONITOR:
1949                         break;
1950                 default:
1951                         ieee80211_reconfig_stations(sdata);
1952                         /* fall through */
1953                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1954                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1955                                 drv_conf_tx(local, sdata, i,
1956                                             &sdata->tx_conf[i]);
1957                         break;
1958                 }
1959
1960                 /* common change flags for all interface types */
1961                 changed = BSS_CHANGED_ERP_CTS_PROT |
1962                           BSS_CHANGED_ERP_PREAMBLE |
1963                           BSS_CHANGED_ERP_SLOT |
1964                           BSS_CHANGED_HT |
1965                           BSS_CHANGED_BASIC_RATES |
1966                           BSS_CHANGED_BEACON_INT |
1967                           BSS_CHANGED_BSSID |
1968                           BSS_CHANGED_CQM |
1969                           BSS_CHANGED_QOS |
1970                           BSS_CHANGED_IDLE |
1971                           BSS_CHANGED_TXPOWER;
1972
1973                 if (sdata->vif.mu_mimo_owner)
1974                         changed |= BSS_CHANGED_MU_GROUPS;
1975
1976                 switch (sdata->vif.type) {
1977                 case NL80211_IFTYPE_STATION:
1978                         changed |= BSS_CHANGED_ASSOC |
1979                                    BSS_CHANGED_ARP_FILTER |
1980                                    BSS_CHANGED_PS;
1981
1982                         /* Re-send beacon info report to the driver */
1983                         if (sdata->u.mgd.have_beacon)
1984                                 changed |= BSS_CHANGED_BEACON_INFO;
1985
1986                         if (sdata->vif.bss_conf.max_idle_period ||
1987                             sdata->vif.bss_conf.protected_keep_alive)
1988                                 changed |= BSS_CHANGED_KEEP_ALIVE;
1989
1990                         sdata_lock(sdata);
1991                         ieee80211_bss_info_change_notify(sdata, changed);
1992                         sdata_unlock(sdata);
1993                         break;
1994                 case NL80211_IFTYPE_OCB:
1995                         changed |= BSS_CHANGED_OCB;
1996                         ieee80211_bss_info_change_notify(sdata, changed);
1997                         break;
1998                 case NL80211_IFTYPE_ADHOC:
1999                         changed |= BSS_CHANGED_IBSS;
2000                         /* fall through */
2001                 case NL80211_IFTYPE_AP:
2002                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2003
2004                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2005                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2006
2007                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2008                                         drv_start_ap(local, sdata);
2009                         }
2010
2011                         /* fall through */
2012                 case NL80211_IFTYPE_MESH_POINT:
2013                         if (sdata->vif.bss_conf.enable_beacon) {
2014                                 changed |= BSS_CHANGED_BEACON |
2015                                            BSS_CHANGED_BEACON_ENABLED;
2016                                 ieee80211_bss_info_change_notify(sdata, changed);
2017                         }
2018                         break;
2019                 case NL80211_IFTYPE_NAN:
2020                         res = ieee80211_reconfig_nan(sdata);
2021                         if (res < 0) {
2022                                 ieee80211_handle_reconfig_failure(local);
2023                                 return res;
2024                         }
2025                         break;
2026                 case NL80211_IFTYPE_WDS:
2027                 case NL80211_IFTYPE_AP_VLAN:
2028                 case NL80211_IFTYPE_MONITOR:
2029                 case NL80211_IFTYPE_P2P_DEVICE:
2030                         /* nothing to do */
2031                         break;
2032                 case NL80211_IFTYPE_UNSPECIFIED:
2033                 case NUM_NL80211_IFTYPES:
2034                 case NL80211_IFTYPE_P2P_CLIENT:
2035                 case NL80211_IFTYPE_P2P_GO:
2036                         WARN_ON(1);
2037                         break;
2038                 }
2039         }
2040
2041         ieee80211_recalc_ps(local);
2042
2043         /*
2044          * The sta might be in psm against the ap (e.g. because
2045          * this was the state before a hw restart), so we
2046          * explicitly send a null packet in order to make sure
2047          * it'll sync against the ap (and get out of psm).
2048          */
2049         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2050                 list_for_each_entry(sdata, &local->interfaces, list) {
2051                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2052                                 continue;
2053                         if (!sdata->u.mgd.associated)
2054                                 continue;
2055
2056                         ieee80211_send_nullfunc(local, sdata, false);
2057                 }
2058         }
2059
2060         /* APs are now beaconing, add back stations */
2061         mutex_lock(&local->sta_mtx);
2062         list_for_each_entry(sta, &local->sta_list, list) {
2063                 enum ieee80211_sta_state state;
2064
2065                 if (!sta->uploaded)
2066                         continue;
2067
2068                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2069                         continue;
2070
2071                 for (state = IEEE80211_STA_NOTEXIST;
2072                      state < sta->sta_state; state++)
2073                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2074                                               state + 1));
2075         }
2076         mutex_unlock(&local->sta_mtx);
2077
2078         /* add back keys */
2079         list_for_each_entry(sdata, &local->interfaces, list)
2080                 ieee80211_reset_crypto_tx_tailroom(sdata);
2081
2082         list_for_each_entry(sdata, &local->interfaces, list)
2083                 if (ieee80211_sdata_running(sdata))
2084                         ieee80211_enable_keys(sdata);
2085
2086         /* Reconfigure sched scan if it was interrupted by FW restart */
2087         mutex_lock(&local->mtx);
2088         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2089                                                 lockdep_is_held(&local->mtx));
2090         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2091                                                 lockdep_is_held(&local->mtx));
2092         if (sched_scan_sdata && sched_scan_req)
2093                 /*
2094                  * Sched scan stopped, but we don't want to report it. Instead,
2095                  * we're trying to reschedule. However, if more than one scan
2096                  * plan was set, we cannot reschedule since we don't know which
2097                  * scan plan was currently running (and some scan plans may have
2098                  * already finished).
2099                  */
2100                 if (sched_scan_req->n_scan_plans > 1 ||
2101                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2102                                                          sched_scan_req)) {
2103                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2104                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2105                         sched_scan_stopped = true;
2106                 }
2107         mutex_unlock(&local->mtx);
2108
2109         if (sched_scan_stopped)
2110                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2111
2112  wake_up:
2113
2114         if (local->monitors == local->open_count && local->monitors > 0)
2115                 ieee80211_add_virtual_monitor(local);
2116
2117         /*
2118          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2119          * sessions can be established after a resume.
2120          *
2121          * Also tear down aggregation sessions since reconfiguring
2122          * them in a hardware restart scenario is not easily done
2123          * right now, and the hardware will have lost information
2124          * about the sessions, but we and the AP still think they
2125          * are active. This is really a workaround though.
2126          */
2127         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2128                 mutex_lock(&local->sta_mtx);
2129
2130                 list_for_each_entry(sta, &local->sta_list, list) {
2131                         if (!local->resuming)
2132                                 ieee80211_sta_tear_down_BA_sessions(
2133                                                 sta, AGG_STOP_LOCAL_REQUEST);
2134                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2135                 }
2136
2137                 mutex_unlock(&local->sta_mtx);
2138         }
2139
2140         if (local->in_reconfig) {
2141                 local->in_reconfig = false;
2142                 barrier();
2143
2144                 /* Restart deferred ROCs */
2145                 mutex_lock(&local->mtx);
2146                 ieee80211_start_next_roc(local);
2147                 mutex_unlock(&local->mtx);
2148         }
2149
2150         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2151                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2152                                         false);
2153
2154         /*
2155          * If this is for hw restart things are still running.
2156          * We may want to change that later, however.
2157          */
2158         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2159                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2160
2161         if (!suspended)
2162                 return 0;
2163
2164 #ifdef CONFIG_PM
2165         /* first set suspended false, then resuming */
2166         local->suspended = false;
2167         mb();
2168         local->resuming = false;
2169
2170         ieee80211_flush_completed_scan(local, false);
2171
2172         if (local->open_count && !reconfig_due_to_wowlan)
2173                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2174
2175         list_for_each_entry(sdata, &local->interfaces, list) {
2176                 if (!ieee80211_sdata_running(sdata))
2177                         continue;
2178                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2179                         ieee80211_sta_restart(sdata);
2180         }
2181
2182         mod_timer(&local->sta_cleanup, jiffies + 1);
2183 #else
2184         WARN_ON(1);
2185 #endif
2186
2187         return 0;
2188 }
2189
2190 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2191 {
2192         struct ieee80211_sub_if_data *sdata;
2193         struct ieee80211_local *local;
2194         struct ieee80211_key *key;
2195
2196         if (WARN_ON(!vif))
2197                 return;
2198
2199         sdata = vif_to_sdata(vif);
2200         local = sdata->local;
2201
2202         if (WARN_ON(!local->resuming))
2203                 return;
2204
2205         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2206                 return;
2207
2208         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2209
2210         mutex_lock(&local->key_mtx);
2211         list_for_each_entry(key, &sdata->key_list, list)
2212                 key->flags |= KEY_FLAG_TAINTED;
2213         mutex_unlock(&local->key_mtx);
2214 }
2215 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2216
2217 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2218 {
2219         struct ieee80211_local *local = sdata->local;
2220         struct ieee80211_chanctx_conf *chanctx_conf;
2221         struct ieee80211_chanctx *chanctx;
2222
2223         mutex_lock(&local->chanctx_mtx);
2224
2225         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2226                                         lockdep_is_held(&local->chanctx_mtx));
2227
2228         /*
2229          * This function can be called from a work, thus it may be possible
2230          * that the chanctx_conf is removed (due to a disconnection, for
2231          * example).
2232          * So nothing should be done in such case.
2233          */
2234         if (!chanctx_conf)
2235                 goto unlock;
2236
2237         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2238         ieee80211_recalc_smps_chanctx(local, chanctx);
2239  unlock:
2240         mutex_unlock(&local->chanctx_mtx);
2241 }
2242
2243 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2244 {
2245         struct ieee80211_local *local = sdata->local;
2246         struct ieee80211_chanctx_conf *chanctx_conf;
2247         struct ieee80211_chanctx *chanctx;
2248
2249         mutex_lock(&local->chanctx_mtx);
2250
2251         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2252                                         lockdep_is_held(&local->chanctx_mtx));
2253
2254         if (WARN_ON_ONCE(!chanctx_conf))
2255                 goto unlock;
2256
2257         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2258         ieee80211_recalc_chanctx_min_def(local, chanctx);
2259  unlock:
2260         mutex_unlock(&local->chanctx_mtx);
2261 }
2262
2263 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2264 {
2265         size_t pos = offset;
2266
2267         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2268                 pos += 2 + ies[pos + 1];
2269
2270         return pos;
2271 }
2272
2273 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2274                                             int rssi_min_thold,
2275                                             int rssi_max_thold)
2276 {
2277         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2278
2279         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2280                 return;
2281
2282         /*
2283          * Scale up threshold values before storing it, as the RSSI averaging
2284          * algorithm uses a scaled up value as well. Change this scaling
2285          * factor if the RSSI averaging algorithm changes.
2286          */
2287         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2288         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2289 }
2290
2291 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2292                                     int rssi_min_thold,
2293                                     int rssi_max_thold)
2294 {
2295         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2296
2297         WARN_ON(rssi_min_thold == rssi_max_thold ||
2298                 rssi_min_thold > rssi_max_thold);
2299
2300         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2301                                        rssi_max_thold);
2302 }
2303 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2304
2305 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2306 {
2307         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2308
2309         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2310 }
2311 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2312
2313 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2314                               u16 cap)
2315 {
2316         __le16 tmp;
2317
2318         *pos++ = WLAN_EID_HT_CAPABILITY;
2319         *pos++ = sizeof(struct ieee80211_ht_cap);
2320         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2321
2322         /* capability flags */
2323         tmp = cpu_to_le16(cap);
2324         memcpy(pos, &tmp, sizeof(u16));
2325         pos += sizeof(u16);
2326
2327         /* AMPDU parameters */
2328         *pos++ = ht_cap->ampdu_factor |
2329                  (ht_cap->ampdu_density <<
2330                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2331
2332         /* MCS set */
2333         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2334         pos += sizeof(ht_cap->mcs);
2335
2336         /* extended capabilities */
2337         pos += sizeof(__le16);
2338
2339         /* BF capabilities */
2340         pos += sizeof(__le32);
2341
2342         /* antenna selection */
2343         pos += sizeof(u8);
2344
2345         return pos;
2346 }
2347
2348 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2349                                u32 cap)
2350 {
2351         __le32 tmp;
2352
2353         *pos++ = WLAN_EID_VHT_CAPABILITY;
2354         *pos++ = sizeof(struct ieee80211_vht_cap);
2355         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2356
2357         /* capability flags */
2358         tmp = cpu_to_le32(cap);
2359         memcpy(pos, &tmp, sizeof(u32));
2360         pos += sizeof(u32);
2361
2362         /* VHT MCS set */
2363         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2364         pos += sizeof(vht_cap->vht_mcs);
2365
2366         return pos;
2367 }
2368
2369 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2370                                const struct cfg80211_chan_def *chandef,
2371                                u16 prot_mode, bool rifs_mode)
2372 {
2373         struct ieee80211_ht_operation *ht_oper;
2374         /* Build HT Information */
2375         *pos++ = WLAN_EID_HT_OPERATION;
2376         *pos++ = sizeof(struct ieee80211_ht_operation);
2377         ht_oper = (struct ieee80211_ht_operation *)pos;
2378         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2379                                         chandef->chan->center_freq);
2380         switch (chandef->width) {
2381         case NL80211_CHAN_WIDTH_160:
2382         case NL80211_CHAN_WIDTH_80P80:
2383         case NL80211_CHAN_WIDTH_80:
2384         case NL80211_CHAN_WIDTH_40:
2385                 if (chandef->center_freq1 > chandef->chan->center_freq)
2386                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2387                 else
2388                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2389                 break;
2390         default:
2391                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2392                 break;
2393         }
2394         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2395             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2396             chandef->width != NL80211_CHAN_WIDTH_20)
2397                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2398
2399         if (rifs_mode)
2400                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2401
2402         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2403         ht_oper->stbc_param = 0x0000;
2404
2405         /* It seems that Basic MCS set and Supported MCS set
2406            are identical for the first 10 bytes */
2407         memset(&ht_oper->basic_set, 0, 16);
2408         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2409
2410         return pos + sizeof(struct ieee80211_ht_operation);
2411 }
2412
2413 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2414                                    const struct cfg80211_chan_def *chandef)
2415 {
2416         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2417         *pos++ = 3;                                     /* IE length */
2418         /* New channel width */
2419         switch (chandef->width) {
2420         case NL80211_CHAN_WIDTH_80:
2421                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2422                 break;
2423         case NL80211_CHAN_WIDTH_160:
2424                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2425                 break;
2426         case NL80211_CHAN_WIDTH_80P80:
2427                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2428                 break;
2429         default:
2430                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2431         }
2432
2433         /* new center frequency segment 0 */
2434         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2435         /* new center frequency segment 1 */
2436         if (chandef->center_freq2)
2437                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2438         else
2439                 *pos++ = 0;
2440 }
2441
2442 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2443                                 const struct cfg80211_chan_def *chandef)
2444 {
2445         struct ieee80211_vht_operation *vht_oper;
2446
2447         *pos++ = WLAN_EID_VHT_OPERATION;
2448         *pos++ = sizeof(struct ieee80211_vht_operation);
2449         vht_oper = (struct ieee80211_vht_operation *)pos;
2450         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2451                                                         chandef->center_freq1);
2452         if (chandef->center_freq2)
2453                 vht_oper->center_freq_seg1_idx =
2454                         ieee80211_frequency_to_channel(chandef->center_freq2);
2455         else
2456                 vht_oper->center_freq_seg1_idx = 0x00;
2457
2458         switch (chandef->width) {
2459         case NL80211_CHAN_WIDTH_160:
2460                 /*
2461                  * Convert 160 MHz channel width to new style as interop
2462                  * workaround.
2463                  */
2464                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2465                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2466                 if (chandef->chan->center_freq < chandef->center_freq1)
2467                         vht_oper->center_freq_seg0_idx -= 8;
2468                 else
2469                         vht_oper->center_freq_seg0_idx += 8;
2470                 break;
2471         case NL80211_CHAN_WIDTH_80P80:
2472                 /*
2473                  * Convert 80+80 MHz channel width to new style as interop
2474                  * workaround.
2475                  */
2476                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2477                 break;
2478         case NL80211_CHAN_WIDTH_80:
2479                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2480                 break;
2481         default:
2482                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2483                 break;
2484         }
2485
2486         /* don't require special VHT peer rates */
2487         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2488
2489         return pos + sizeof(struct ieee80211_vht_operation);
2490 }
2491
2492 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2493                                struct cfg80211_chan_def *chandef)
2494 {
2495         enum nl80211_channel_type channel_type;
2496
2497         if (!ht_oper)
2498                 return false;
2499
2500         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2501         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2502                 channel_type = NL80211_CHAN_HT20;
2503                 break;
2504         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2505                 channel_type = NL80211_CHAN_HT40PLUS;
2506                 break;
2507         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2508                 channel_type = NL80211_CHAN_HT40MINUS;
2509                 break;
2510         default:
2511                 channel_type = NL80211_CHAN_NO_HT;
2512                 return false;
2513         }
2514
2515         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2516         return true;
2517 }
2518
2519 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2520                                 struct cfg80211_chan_def *chandef)
2521 {
2522         struct cfg80211_chan_def new = *chandef;
2523         int cf1, cf2;
2524
2525         if (!oper)
2526                 return false;
2527
2528         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2529                                              chandef->chan->band);
2530         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2531                                              chandef->chan->band);
2532
2533         switch (oper->chan_width) {
2534         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2535                 break;
2536         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2537                 new.width = NL80211_CHAN_WIDTH_80;
2538                 new.center_freq1 = cf1;
2539                 /* If needed, adjust based on the newer interop workaround. */
2540                 if (oper->center_freq_seg1_idx) {
2541                         unsigned int diff;
2542
2543                         diff = abs(oper->center_freq_seg1_idx -
2544                                    oper->center_freq_seg0_idx);
2545                         if (diff == 8) {
2546                                 new.width = NL80211_CHAN_WIDTH_160;
2547                                 new.center_freq1 = cf2;
2548                         } else if (diff > 8) {
2549                                 new.width = NL80211_CHAN_WIDTH_80P80;
2550                                 new.center_freq2 = cf2;
2551                         }
2552                 }
2553                 break;
2554         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2555                 new.width = NL80211_CHAN_WIDTH_160;
2556                 new.center_freq1 = cf1;
2557                 break;
2558         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2559                 new.width = NL80211_CHAN_WIDTH_80P80;
2560                 new.center_freq1 = cf1;
2561                 new.center_freq2 = cf2;
2562                 break;
2563         default:
2564                 return false;
2565         }
2566
2567         if (!cfg80211_chandef_valid(&new))
2568                 return false;
2569
2570         *chandef = new;
2571         return true;
2572 }
2573
2574 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2575                              const struct ieee80211_supported_band *sband,
2576                              const u8 *srates, int srates_len, u32 *rates)
2577 {
2578         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2579         int shift = ieee80211_chandef_get_shift(chandef);
2580         struct ieee80211_rate *br;
2581         int brate, rate, i, j, count = 0;
2582
2583         *rates = 0;
2584
2585         for (i = 0; i < srates_len; i++) {
2586                 rate = srates[i] & 0x7f;
2587
2588                 for (j = 0; j < sband->n_bitrates; j++) {
2589                         br = &sband->bitrates[j];
2590                         if ((rate_flags & br->flags) != rate_flags)
2591                                 continue;
2592
2593                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2594                         if (brate == rate) {
2595                                 *rates |= BIT(j);
2596                                 count++;
2597                                 break;
2598                         }
2599                 }
2600         }
2601         return count;
2602 }
2603
2604 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2605                             struct sk_buff *skb, bool need_basic,
2606                             enum nl80211_band band)
2607 {
2608         struct ieee80211_local *local = sdata->local;
2609         struct ieee80211_supported_band *sband;
2610         int rate, shift;
2611         u8 i, rates, *pos;
2612         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2613         u32 rate_flags;
2614
2615         shift = ieee80211_vif_get_shift(&sdata->vif);
2616         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2617         sband = local->hw.wiphy->bands[band];
2618         rates = 0;
2619         for (i = 0; i < sband->n_bitrates; i++) {
2620                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2621                         continue;
2622                 rates++;
2623         }
2624         if (rates > 8)
2625                 rates = 8;
2626
2627         if (skb_tailroom(skb) < rates + 2)
2628                 return -ENOMEM;
2629
2630         pos = skb_put(skb, rates + 2);
2631         *pos++ = WLAN_EID_SUPP_RATES;
2632         *pos++ = rates;
2633         for (i = 0; i < rates; i++) {
2634                 u8 basic = 0;
2635                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2636                         continue;
2637
2638                 if (need_basic && basic_rates & BIT(i))
2639                         basic = 0x80;
2640                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2641                                     5 * (1 << shift));
2642                 *pos++ = basic | (u8) rate;
2643         }
2644
2645         return 0;
2646 }
2647
2648 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2649                                 struct sk_buff *skb, bool need_basic,
2650                                 enum nl80211_band band)
2651 {
2652         struct ieee80211_local *local = sdata->local;
2653         struct ieee80211_supported_band *sband;
2654         int rate, shift;
2655         u8 i, exrates, *pos;
2656         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2657         u32 rate_flags;
2658
2659         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2660         shift = ieee80211_vif_get_shift(&sdata->vif);
2661
2662         sband = local->hw.wiphy->bands[band];
2663         exrates = 0;
2664         for (i = 0; i < sband->n_bitrates; i++) {
2665                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2666                         continue;
2667                 exrates++;
2668         }
2669
2670         if (exrates > 8)
2671                 exrates -= 8;
2672         else
2673                 exrates = 0;
2674
2675         if (skb_tailroom(skb) < exrates + 2)
2676                 return -ENOMEM;
2677
2678         if (exrates) {
2679                 pos = skb_put(skb, exrates + 2);
2680                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2681                 *pos++ = exrates;
2682                 for (i = 8; i < sband->n_bitrates; i++) {
2683                         u8 basic = 0;
2684                         if ((rate_flags & sband->bitrates[i].flags)
2685                             != rate_flags)
2686                                 continue;
2687                         if (need_basic && basic_rates & BIT(i))
2688                                 basic = 0x80;
2689                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2690                                             5 * (1 << shift));
2691                         *pos++ = basic | (u8) rate;
2692                 }
2693         }
2694         return 0;
2695 }
2696
2697 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2698 {
2699         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2700         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2701
2702         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2703                 /* non-managed type inferfaces */
2704                 return 0;
2705         }
2706         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2707 }
2708 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2709
2710 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2711 {
2712         if (!mcs)
2713                 return 1;
2714
2715         /* TODO: consider rx_highest */
2716
2717         if (mcs->rx_mask[3])
2718                 return 4;
2719         if (mcs->rx_mask[2])
2720                 return 3;
2721         if (mcs->rx_mask[1])
2722                 return 2;
2723         return 1;
2724 }
2725
2726 /**
2727  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2728  * @local: mac80211 hw info struct
2729  * @status: RX status
2730  * @mpdu_len: total MPDU length (including FCS)
2731  * @mpdu_offset: offset into MPDU to calculate timestamp at
2732  *
2733  * This function calculates the RX timestamp at the given MPDU offset, taking
2734  * into account what the RX timestamp was. An offset of 0 will just normalize
2735  * the timestamp to TSF at beginning of MPDU reception.
2736  */
2737 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2738                                      struct ieee80211_rx_status *status,
2739                                      unsigned int mpdu_len,
2740                                      unsigned int mpdu_offset)
2741 {
2742         u64 ts = status->mactime;
2743         struct rate_info ri;
2744         u16 rate;
2745
2746         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2747                 return 0;
2748
2749         memset(&ri, 0, sizeof(ri));
2750
2751         /* Fill cfg80211 rate info */
2752         switch (status->encoding) {
2753         case RX_ENC_HT:
2754                 ri.mcs = status->rate_idx;
2755                 ri.flags |= RATE_INFO_FLAGS_MCS;
2756                 ri.bw = status->bw;
2757                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2758                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2759                 break;
2760         case RX_ENC_VHT:
2761                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2762                 ri.mcs = status->rate_idx;
2763                 ri.nss = status->nss;
2764                 ri.bw = status->bw;
2765                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2766                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2767                 break;
2768         default:
2769                 WARN_ON(1);
2770                 /* fall through */
2771         case RX_ENC_LEGACY: {
2772                 struct ieee80211_supported_band *sband;
2773                 int shift = 0;
2774                 int bitrate;
2775
2776                 ri.bw = status->bw;
2777
2778                 switch (status->bw) {
2779                 case RATE_INFO_BW_10:
2780                         shift = 1;
2781                         break;
2782                 case RATE_INFO_BW_5:
2783                         shift = 2;
2784                         break;
2785                 }
2786
2787                 sband = local->hw.wiphy->bands[status->band];
2788                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2789                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2790
2791                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2792                         /* TODO: handle HT/VHT preambles */
2793                         if (status->band == NL80211_BAND_5GHZ) {
2794                                 ts += 20 << shift;
2795                                 mpdu_offset += 2;
2796                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2797                                 ts += 96;
2798                         } else {
2799                                 ts += 192;
2800                         }
2801                 }
2802                 break;
2803                 }
2804         }
2805
2806         rate = cfg80211_calculate_bitrate(&ri);
2807         if (WARN_ONCE(!rate,
2808                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2809                       (unsigned long long)status->flag, status->rate_idx,
2810                       status->nss))
2811                 return 0;
2812
2813         /* rewind from end of MPDU */
2814         if (status->flag & RX_FLAG_MACTIME_END)
2815                 ts -= mpdu_len * 8 * 10 / rate;
2816
2817         ts += mpdu_offset * 8 * 10 / rate;
2818
2819         return ts;
2820 }
2821
2822 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2823 {
2824         struct ieee80211_sub_if_data *sdata;
2825         struct cfg80211_chan_def chandef;
2826
2827         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2828         ASSERT_RTNL();
2829
2830         mutex_lock(&local->mtx);
2831         list_for_each_entry(sdata, &local->interfaces, list) {
2832                 /* it might be waiting for the local->mtx, but then
2833                  * by the time it gets it, sdata->wdev.cac_started
2834                  * will no longer be true
2835                  */
2836                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2837
2838                 if (sdata->wdev.cac_started) {
2839                         chandef = sdata->vif.bss_conf.chandef;
2840                         ieee80211_vif_release_channel(sdata);
2841                         cfg80211_cac_event(sdata->dev,
2842                                            &chandef,
2843                                            NL80211_RADAR_CAC_ABORTED,
2844                                            GFP_KERNEL);
2845                 }
2846         }
2847         mutex_unlock(&local->mtx);
2848 }
2849
2850 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2851 {
2852         struct ieee80211_local *local =
2853                 container_of(work, struct ieee80211_local, radar_detected_work);
2854         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2855         struct ieee80211_chanctx *ctx;
2856         int num_chanctx = 0;
2857
2858         mutex_lock(&local->chanctx_mtx);
2859         list_for_each_entry(ctx, &local->chanctx_list, list) {
2860                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2861                         continue;
2862
2863                 num_chanctx++;
2864                 chandef = ctx->conf.def;
2865         }
2866         mutex_unlock(&local->chanctx_mtx);
2867
2868         rtnl_lock();
2869         ieee80211_dfs_cac_cancel(local);
2870         rtnl_unlock();
2871
2872         if (num_chanctx > 1)
2873                 /* XXX: multi-channel is not supported yet */
2874                 WARN_ON(1);
2875         else
2876                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2877 }
2878
2879 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2880 {
2881         struct ieee80211_local *local = hw_to_local(hw);
2882
2883         trace_api_radar_detected(local);
2884
2885         schedule_work(&local->radar_detected_work);
2886 }
2887 EXPORT_SYMBOL(ieee80211_radar_detected);
2888
2889 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2890 {
2891         u32 ret;
2892         int tmp;
2893
2894         switch (c->width) {
2895         case NL80211_CHAN_WIDTH_20:
2896                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2897                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2898                 break;
2899         case NL80211_CHAN_WIDTH_40:
2900                 c->width = NL80211_CHAN_WIDTH_20;
2901                 c->center_freq1 = c->chan->center_freq;
2902                 ret = IEEE80211_STA_DISABLE_40MHZ |
2903                       IEEE80211_STA_DISABLE_VHT;
2904                 break;
2905         case NL80211_CHAN_WIDTH_80:
2906                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2907                 /* n_P40 */
2908                 tmp /= 2;
2909                 /* freq_P40 */
2910                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2911                 c->width = NL80211_CHAN_WIDTH_40;
2912                 ret = IEEE80211_STA_DISABLE_VHT;
2913                 break;
2914         case NL80211_CHAN_WIDTH_80P80:
2915                 c->center_freq2 = 0;
2916                 c->width = NL80211_CHAN_WIDTH_80;
2917                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2918                       IEEE80211_STA_DISABLE_160MHZ;
2919                 break;
2920         case NL80211_CHAN_WIDTH_160:
2921                 /* n_P20 */
2922                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2923                 /* n_P80 */
2924                 tmp /= 4;
2925                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2926                 c->width = NL80211_CHAN_WIDTH_80;
2927                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2928                       IEEE80211_STA_DISABLE_160MHZ;
2929                 break;
2930         default:
2931         case NL80211_CHAN_WIDTH_20_NOHT:
2932                 WARN_ON_ONCE(1);
2933                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2934                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2935                 break;
2936         case NL80211_CHAN_WIDTH_5:
2937         case NL80211_CHAN_WIDTH_10:
2938                 WARN_ON_ONCE(1);
2939                 /* keep c->width */
2940                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2941                 break;
2942         }
2943
2944         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2945
2946         return ret;
2947 }
2948
2949 /*
2950  * Returns true if smps_mode_new is strictly more restrictive than
2951  * smps_mode_old.
2952  */
2953 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2954                                    enum ieee80211_smps_mode smps_mode_new)
2955 {
2956         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2957                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2958                 return false;
2959
2960         switch (smps_mode_old) {
2961         case IEEE80211_SMPS_STATIC:
2962                 return false;
2963         case IEEE80211_SMPS_DYNAMIC:
2964                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2965         case IEEE80211_SMPS_OFF:
2966                 return smps_mode_new != IEEE80211_SMPS_OFF;
2967         default:
2968                 WARN_ON(1);
2969         }
2970
2971         return false;
2972 }
2973
2974 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2975                               struct cfg80211_csa_settings *csa_settings)
2976 {
2977         struct sk_buff *skb;
2978         struct ieee80211_mgmt *mgmt;
2979         struct ieee80211_local *local = sdata->local;
2980         int freq;
2981         int hdr_len = offsetofend(struct ieee80211_mgmt,
2982                                   u.action.u.chan_switch);
2983         u8 *pos;
2984
2985         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2986             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2987                 return -EOPNOTSUPP;
2988
2989         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2990                             5 + /* channel switch announcement element */
2991                             3 + /* secondary channel offset element */
2992                             5 + /* wide bandwidth channel switch announcement */
2993                             8); /* mesh channel switch parameters element */
2994         if (!skb)
2995                 return -ENOMEM;
2996
2997         skb_reserve(skb, local->tx_headroom);
2998         mgmt = skb_put_zero(skb, hdr_len);
2999         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3000                                           IEEE80211_STYPE_ACTION);
3001
3002         eth_broadcast_addr(mgmt->da);
3003         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3004         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3005                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3006         } else {
3007                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3008                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3009         }
3010         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3011         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3012         pos = skb_put(skb, 5);
3013         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3014         *pos++ = 3;                                             /* IE length */
3015         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3016         freq = csa_settings->chandef.chan->center_freq;
3017         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3018         *pos++ = csa_settings->count;                           /* count */
3019
3020         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3021                 enum nl80211_channel_type ch_type;
3022
3023                 skb_put(skb, 3);
3024                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3025                 *pos++ = 1;                                     /* IE length */
3026                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3027                 if (ch_type == NL80211_CHAN_HT40PLUS)
3028                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3029                 else
3030                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3031         }
3032
3033         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3034                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3035
3036                 skb_put(skb, 8);
3037                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3038                 *pos++ = 6;                                     /* IE length */
3039                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3040                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3041                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3042                 *pos++ |= csa_settings->block_tx ?
3043                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3044                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3045                 pos += 2;
3046                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3047                 pos += 2;
3048         }
3049
3050         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3051             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3052             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3053                 skb_put(skb, 5);
3054                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3055         }
3056
3057         ieee80211_tx_skb(sdata, skb);
3058         return 0;
3059 }
3060
3061 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3062 {
3063         return !(cs == NULL || cs->cipher == 0 ||
3064                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3065                  cs->hdr_len <= cs->key_idx_off ||
3066                  cs->key_idx_shift > 7 ||
3067                  cs->key_idx_mask == 0);
3068 }
3069
3070 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3071 {
3072         int i;
3073
3074         /* Ensure we have enough iftype bitmap space for all iftype values */
3075         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3076
3077         for (i = 0; i < n; i++)
3078                 if (!ieee80211_cs_valid(&cs[i]))
3079                         return false;
3080
3081         return true;
3082 }
3083
3084 const struct ieee80211_cipher_scheme *
3085 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3086                  enum nl80211_iftype iftype)
3087 {
3088         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3089         int n = local->hw.n_cipher_schemes;
3090         int i;
3091         const struct ieee80211_cipher_scheme *cs = NULL;
3092
3093         for (i = 0; i < n; i++) {
3094                 if (l[i].cipher == cipher) {
3095                         cs = &l[i];
3096                         break;
3097                 }
3098         }
3099
3100         if (!cs || !(cs->iftype & BIT(iftype)))
3101                 return NULL;
3102
3103         return cs;
3104 }
3105
3106 int ieee80211_cs_headroom(struct ieee80211_local *local,
3107                           struct cfg80211_crypto_settings *crypto,
3108                           enum nl80211_iftype iftype)
3109 {
3110         const struct ieee80211_cipher_scheme *cs;
3111         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3112         int i;
3113
3114         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3115                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3116                                       iftype);
3117
3118                 if (cs && headroom < cs->hdr_len)
3119                         headroom = cs->hdr_len;
3120         }
3121
3122         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3123         if (cs && headroom < cs->hdr_len)
3124                 headroom = cs->hdr_len;
3125
3126         return headroom;
3127 }
3128
3129 static bool
3130 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3131 {
3132         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3133         int skip;
3134
3135         if (end > 0)
3136                 return false;
3137
3138         /* One shot NOA  */
3139         if (data->count[i] == 1)
3140                 return false;
3141
3142         if (data->desc[i].interval == 0)
3143                 return false;
3144
3145         /* End time is in the past, check for repetitions */
3146         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3147         if (data->count[i] < 255) {
3148                 if (data->count[i] <= skip) {
3149                         data->count[i] = 0;
3150                         return false;
3151                 }
3152
3153                 data->count[i] -= skip;
3154         }
3155
3156         data->desc[i].start += skip * data->desc[i].interval;
3157
3158         return true;
3159 }
3160
3161 static bool
3162 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3163                              s32 *offset)
3164 {
3165         bool ret = false;
3166         int i;
3167
3168         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3169                 s32 cur;
3170
3171                 if (!data->count[i])
3172                         continue;
3173
3174                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3175                         ret = true;
3176
3177                 cur = data->desc[i].start - tsf;
3178                 if (cur > *offset)
3179                         continue;
3180
3181                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3182                 if (cur > *offset)
3183                         *offset = cur;
3184         }
3185
3186         return ret;
3187 }
3188
3189 static u32
3190 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3191 {
3192         s32 offset = 0;
3193         int tries = 0;
3194         /*
3195          * arbitrary limit, used to avoid infinite loops when combined NoA
3196          * descriptors cover the full time period.
3197          */
3198         int max_tries = 5;
3199
3200         ieee80211_extend_absent_time(data, tsf, &offset);
3201         do {
3202                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3203                         break;
3204
3205                 tries++;
3206         } while (tries < max_tries);
3207
3208         return offset;
3209 }
3210
3211 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3212 {
3213         u32 next_offset = BIT(31) - 1;
3214         int i;
3215
3216         data->absent = 0;
3217         data->has_next_tsf = false;
3218         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3219                 s32 start;
3220
3221                 if (!data->count[i])
3222                         continue;
3223
3224                 ieee80211_extend_noa_desc(data, tsf, i);
3225                 start = data->desc[i].start - tsf;
3226                 if (start <= 0)
3227                         data->absent |= BIT(i);
3228
3229                 if (next_offset > start)
3230                         next_offset = start;
3231
3232                 data->has_next_tsf = true;
3233         }
3234
3235         if (data->absent)
3236                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3237
3238         data->next_tsf = tsf + next_offset;
3239 }
3240 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3241
3242 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3243                             struct ieee80211_noa_data *data, u32 tsf)
3244 {
3245         int ret = 0;
3246         int i;
3247
3248         memset(data, 0, sizeof(*data));
3249
3250         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3251                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3252
3253                 if (!desc->count || !desc->duration)
3254                         continue;
3255
3256                 data->count[i] = desc->count;
3257                 data->desc[i].start = le32_to_cpu(desc->start_time);
3258                 data->desc[i].duration = le32_to_cpu(desc->duration);
3259                 data->desc[i].interval = le32_to_cpu(desc->interval);
3260
3261                 if (data->count[i] > 1 &&
3262                     data->desc[i].interval < data->desc[i].duration)
3263                         continue;
3264
3265                 ieee80211_extend_noa_desc(data, tsf, i);
3266                 ret++;
3267         }
3268
3269         if (ret)
3270                 ieee80211_update_p2p_noa(data, tsf);
3271
3272         return ret;
3273 }
3274 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3275
3276 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3277                            struct ieee80211_sub_if_data *sdata)
3278 {
3279         u64 tsf = drv_get_tsf(local, sdata);
3280         u64 dtim_count = 0;
3281         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3282         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3283         struct ps_data *ps;
3284         u8 bcns_from_dtim;
3285
3286         if (tsf == -1ULL || !beacon_int || !dtim_period)
3287                 return;
3288
3289         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3290             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3291                 if (!sdata->bss)
3292                         return;
3293
3294                 ps = &sdata->bss->ps;
3295         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3296                 ps = &sdata->u.mesh.ps;
3297         } else {
3298                 return;
3299         }
3300
3301         /*
3302          * actually finds last dtim_count, mac80211 will update in
3303          * __beacon_add_tim().
3304          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3305          */
3306         do_div(tsf, beacon_int);
3307         bcns_from_dtim = do_div(tsf, dtim_period);
3308         /* just had a DTIM */
3309         if (!bcns_from_dtim)
3310                 dtim_count = 0;
3311         else
3312                 dtim_count = dtim_period - bcns_from_dtim;
3313
3314         ps->dtim_count = dtim_count;
3315 }
3316
3317 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3318                                          struct ieee80211_chanctx *ctx)
3319 {
3320         struct ieee80211_sub_if_data *sdata;
3321         u8 radar_detect = 0;
3322
3323         lockdep_assert_held(&local->chanctx_mtx);
3324
3325         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3326                 return 0;
3327
3328         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3329                 if (sdata->reserved_radar_required)
3330                         radar_detect |= BIT(sdata->reserved_chandef.width);
3331
3332         /*
3333          * An in-place reservation context should not have any assigned vifs
3334          * until it replaces the other context.
3335          */
3336         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3337                 !list_empty(&ctx->assigned_vifs));
3338
3339         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3340                 if (sdata->radar_required)
3341                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3342
3343         return radar_detect;
3344 }
3345
3346 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3347                                  const struct cfg80211_chan_def *chandef,
3348                                  enum ieee80211_chanctx_mode chanmode,
3349                                  u8 radar_detect)
3350 {
3351         struct ieee80211_local *local = sdata->local;
3352         struct ieee80211_sub_if_data *sdata_iter;
3353         enum nl80211_iftype iftype = sdata->wdev.iftype;
3354         struct ieee80211_chanctx *ctx;
3355         int total = 1;
3356         struct iface_combination_params params = {
3357                 .radar_detect = radar_detect,
3358         };
3359
3360         lockdep_assert_held(&local->chanctx_mtx);
3361
3362         if (WARN_ON(hweight32(radar_detect) > 1))
3363                 return -EINVAL;
3364
3365         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3366                     !chandef->chan))
3367                 return -EINVAL;
3368
3369         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3370                 return -EINVAL;
3371
3372         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3373             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3374                 /*
3375                  * always passing this is harmless, since it'll be the
3376                  * same value that cfg80211 finds if it finds the same
3377                  * interface ... and that's always allowed
3378                  */
3379                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3380         }
3381
3382         /* Always allow software iftypes */
3383         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3384                 if (radar_detect)
3385                         return -EINVAL;
3386                 return 0;
3387         }
3388
3389         if (chandef)
3390                 params.num_different_channels = 1;
3391
3392         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3393                 params.iftype_num[iftype] = 1;
3394
3395         list_for_each_entry(ctx, &local->chanctx_list, list) {
3396                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3397                         continue;
3398                 params.radar_detect |=
3399                         ieee80211_chanctx_radar_detect(local, ctx);
3400                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3401                         params.num_different_channels++;
3402                         continue;
3403                 }
3404                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3405                     cfg80211_chandef_compatible(chandef,
3406                                                 &ctx->conf.def))
3407                         continue;
3408                 params.num_different_channels++;
3409         }
3410
3411         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3412                 struct wireless_dev *wdev_iter;
3413
3414                 wdev_iter = &sdata_iter->wdev;
3415
3416                 if (sdata_iter == sdata ||
3417                     !ieee80211_sdata_running(sdata_iter) ||
3418                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3419                         continue;
3420
3421                 params.iftype_num[wdev_iter->iftype]++;
3422                 total++;
3423         }
3424
3425         if (total == 1 && !params.radar_detect)
3426                 return 0;
3427
3428         return cfg80211_check_combinations(local->hw.wiphy, &params);
3429 }
3430
3431 static void
3432 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3433                          void *data)
3434 {
3435         u32 *max_num_different_channels = data;
3436
3437         *max_num_different_channels = max(*max_num_different_channels,
3438                                           c->num_different_channels);
3439 }
3440
3441 int ieee80211_max_num_channels(struct ieee80211_local *local)
3442 {
3443         struct ieee80211_sub_if_data *sdata;
3444         struct ieee80211_chanctx *ctx;
3445         u32 max_num_different_channels = 1;
3446         int err;
3447         struct iface_combination_params params = {0};
3448
3449         lockdep_assert_held(&local->chanctx_mtx);
3450
3451         list_for_each_entry(ctx, &local->chanctx_list, list) {
3452                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3453                         continue;
3454
3455                 params.num_different_channels++;
3456
3457                 params.radar_detect |=
3458                         ieee80211_chanctx_radar_detect(local, ctx);
3459         }
3460
3461         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3462                 params.iftype_num[sdata->wdev.iftype]++;
3463
3464         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3465                                          ieee80211_iter_max_chans,
3466                                          &max_num_different_channels);
3467         if (err < 0)
3468                 return err;
3469
3470         return max_num_different_channels;
3471 }
3472
3473 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3474 {
3475         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3476         *buf++ = 7; /* len */
3477         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3478         *buf++ = 0x50;
3479         *buf++ = 0xf2;
3480         *buf++ = 2; /* WME */
3481         *buf++ = 0; /* WME info */
3482         *buf++ = 1; /* WME ver */
3483         *buf++ = qosinfo; /* U-APSD no in use */
3484
3485         return buf;
3486 }
3487
3488 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3489                              unsigned long *frame_cnt,
3490                              unsigned long *byte_cnt)
3491 {
3492         struct txq_info *txqi = to_txq_info(txq);
3493         u32 frag_cnt = 0, frag_bytes = 0;
3494         struct sk_buff *skb;
3495
3496         skb_queue_walk(&txqi->frags, skb) {
3497                 frag_cnt++;
3498                 frag_bytes += skb->len;
3499         }
3500
3501         if (frame_cnt)
3502                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3503
3504         if (byte_cnt)
3505                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3506 }
3507 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3508
3509 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3510         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3511         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3512         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3513         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3514 };