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   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 ieee80211_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 == IEEE80211_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 ieee80211_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->hw.queues < IEEE80211_NUM_ACS)
 248                 n_acs = 1;
 249
 250         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 251                 int ac;
 252
 253                 if (!sdata->dev)
 254                         continue;
 255
 256                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 257                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 258                         continue;
 259
 260                 for (ac = 0; ac < n_acs; ac++) {
 261                         int ac_queue = sdata->vif.hw_queue[ac];
 262
 263                         if (local->ops->wake_tx_queue &&
 264                             (atomic_read(&sdata->txqs_len[ac]) >
 265                              local->hw.txq_ac_max_pending))
 266                                 continue;
 267
 268                         if (ac_queue == queue ||
 269                             (sdata->vif.cab_queue == queue &&
 270                              local->queue_stop_reasons[ac_queue] == 0 &&
 271                              skb_queue_empty(&local->pending[ac_queue])))
 272                                 netif_wake_subqueue(sdata->dev, ac);
 273                 }
 274         }
 275 }
 276
 277 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 278                                    enum queue_stop_reason reason,
 279                                    bool refcounted)
 280 {
 281         struct ieee80211_local *local = hw_to_local(hw);
 282
 283         trace_wake_queue(local, queue, reason);
 284
 285         if (WARN_ON(queue >= hw->queues))
 286                 return;
 287
 288         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 289                 return;
 290
 291         if (!refcounted)
 292                 local->q_stop_reasons[queue][reason] = 0;
 293         else
 294                 local->q_stop_reasons[queue][reason]--;
 295
 296         if (local->q_stop_reasons[queue][reason] == 0)
 297                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 298
 299         if (local->queue_stop_reasons[queue] != 0)
 300                 /* someone still has this queue stopped */
 301                 return;
 302
 303         if (skb_queue_empty(&local->pending[queue])) {
 304                 rcu_read_lock();
 305                 ieee80211_propagate_queue_wake(local, queue);
 306                 rcu_read_unlock();
 307         } else
 308                 tasklet_schedule(&local->tx_pending_tasklet);
 309 }
 310
 311 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 312                                     enum queue_stop_reason reason,
 313                                     bool refcounted)
 314 {
 315         struct ieee80211_local *local = hw_to_local(hw);
 316         unsigned long flags;
 317
 318         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 319         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 320         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 321 }
 322
 323 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 324 {
 325         ieee80211_wake_queue_by_reason(hw, queue,
 326                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 327                                        false);
 328 }
 329 EXPORT_SYMBOL(ieee80211_wake_queue);
 330
 331 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 332                                    enum queue_stop_reason reason,
 333                                    bool refcounted)
 334 {
 335         struct ieee80211_local *local = hw_to_local(hw);
 336         struct ieee80211_sub_if_data *sdata;
 337         int n_acs = IEEE80211_NUM_ACS;
 338
 339         trace_stop_queue(local, queue, reason);
 340
 341         if (WARN_ON(queue >= hw->queues))
 342                 return;
 343
 344         if (!refcounted)
 345                 local->q_stop_reasons[queue][reason] = 1;
 346         else
 347                 local->q_stop_reasons[queue][reason]++;
 348
 349         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 350                 return;
 351
 352         if (local->hw.queues < IEEE80211_NUM_ACS)
 353                 n_acs = 1;
 354
 355         rcu_read_lock();
 356         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 357                 int ac;
 358
 359                 if (!sdata->dev)
 360                         continue;
 361
 362                 for (ac = 0; ac < n_acs; ac++) {
 363                         if (sdata->vif.hw_queue[ac] == queue ||
 364                             sdata->vif.cab_queue == queue)
 365                                 netif_stop_subqueue(sdata->dev, ac);
 366                 }
 367         }
 368         rcu_read_unlock();
 369 }
 370
 371 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 372                                     enum queue_stop_reason reason,
 373                                     bool refcounted)
 374 {
 375         struct ieee80211_local *local = hw_to_local(hw);
 376         unsigned long flags;
 377
 378         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 379         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 380         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 381 }
 382
 383 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 384 {
 385         ieee80211_stop_queue_by_reason(hw, queue,
 386                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 387                                        false);
 388 }
 389 EXPORT_SYMBOL(ieee80211_stop_queue);
 390
 391 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 392                                struct sk_buff *skb)
 393 {
 394         struct ieee80211_hw *hw = &local->hw;
 395         unsigned long flags;
 396         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 397         int queue = info->hw_queue;
 398
 399         if (WARN_ON(!info->control.vif)) {
 400                 ieee80211_free_txskb(&local->hw, skb);
 401                 return;
 402         }
 403
 404         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 405         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 406                                false);
 407         __skb_queue_tail(&local->pending[queue], skb);
 408         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 409                                false);
 410         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 411 }
 412
 413 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 414                                 struct sk_buff_head *skbs)
 415 {
 416         struct ieee80211_hw *hw = &local->hw;
 417         struct sk_buff *skb;
 418         unsigned long flags;
 419         int queue, i;
 420
 421         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 422         while ((skb = skb_dequeue(skbs))) {
 423                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 424
 425                 if (WARN_ON(!info->control.vif)) {
 426                         ieee80211_free_txskb(&local->hw, skb);
 427                         continue;
 428                 }
 429
 430                 queue = info->hw_queue;
 431
 432                 __ieee80211_stop_queue(hw, queue,
 433                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 434                                 false);
 435
 436                 __skb_queue_tail(&local->pending[queue], skb);
 437         }
 438
 439         for (i = 0; i < hw->queues; i++)
 440                 __ieee80211_wake_queue(hw, i,
 441                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 442                         false);
 443         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 444 }
 445
 446 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 447                                      unsigned long queues,
 448                                      enum queue_stop_reason reason,
 449                                      bool refcounted)
 450 {
 451         struct ieee80211_local *local = hw_to_local(hw);
 452         unsigned long flags;
 453         int i;
 454
 455         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 456
 457         for_each_set_bit(i, &queues, hw->queues)
 458                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 459
 460         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 461 }
 462
 463 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 464 {
 465         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 466                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 467                                         false);
 468 }
 469 EXPORT_SYMBOL(ieee80211_stop_queues);
 470
 471 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 472 {
 473         struct ieee80211_local *local = hw_to_local(hw);
 474         unsigned long flags;
 475         int ret;
 476
 477         if (WARN_ON(queue >= hw->queues))
 478                 return true;
 479
 480         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 481         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 482                        &local->queue_stop_reasons[queue]);
 483         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 484         return ret;
 485 }
 486 EXPORT_SYMBOL(ieee80211_queue_stopped);
 487
 488 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 489                                      unsigned long queues,
 490                                      enum queue_stop_reason reason,
 491                                      bool refcounted)
 492 {
 493         struct ieee80211_local *local = hw_to_local(hw);
 494         unsigned long flags;
 495         int i;
 496
 497         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 498
 499         for_each_set_bit(i, &queues, hw->queues)
 500                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 501
 502         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 503 }
 504
 505 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 506 {
 507         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 508                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 509                                         false);
 510 }
 511 EXPORT_SYMBOL(ieee80211_wake_queues);
 512
 513 static unsigned int
 514 ieee80211_get_vif_queues(struct ieee80211_local *local,
 515                          struct ieee80211_sub_if_data *sdata)
 516 {
 517         unsigned int queues;
 518
 519         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 520                 int ac;
 521
 522                 queues = 0;
 523
 524                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 525                         queues |= BIT(sdata->vif.hw_queue[ac]);
 526                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 527                         queues |= BIT(sdata->vif.cab_queue);
 528         } else {
 529                 /* all queues */
 530                 queues = BIT(local->hw.queues) - 1;
 531         }
 532
 533         return queues;
 534 }
 535
 536 void __ieee80211_flush_queues(struct ieee80211_local *local,
 537                               struct ieee80211_sub_if_data *sdata,
 538                               unsigned int queues, bool drop)
 539 {
 540         if (!local->ops->flush)
 541                 return;
 542
 543         /*
 544          * If no queue was set, or if the HW doesn't support
 545          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 546          */
 547         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 548                 queues = ieee80211_get_vif_queues(local, sdata);
 549
 550         ieee80211_stop_queues_by_reason(&local->hw, queues,
 551                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 552                                         false);
 553
 554         drv_flush(local, sdata, queues, drop);
 555
 556         ieee80211_wake_queues_by_reason(&local->hw, queues,
 557                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 558                                         false);
 559 }
 560
 561 void ieee80211_flush_queues(struct ieee80211_local *local,
 562                             struct ieee80211_sub_if_data *sdata, bool drop)
 563 {
 564         __ieee80211_flush_queues(local, sdata, 0, drop);
 565 }
 566
 567 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 568                                struct ieee80211_sub_if_data *sdata,
 569                                enum queue_stop_reason reason)
 570 {
 571         ieee80211_stop_queues_by_reason(&local->hw,
 572                                         ieee80211_get_vif_queues(local, sdata),
 573                                         reason, true);
 574 }
 575
 576 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 577                                struct ieee80211_sub_if_data *sdata,
 578                                enum queue_stop_reason reason)
 579 {
 580         ieee80211_wake_queues_by_reason(&local->hw,
 581                                         ieee80211_get_vif_queues(local, sdata),
 582                                         reason, true);
 583 }
 584
 585 static void __iterate_interfaces(struct ieee80211_local *local,
 586                                  u32 iter_flags,
 587                                  void (*iterator)(void *data, u8 *mac,
 588                                                   struct ieee80211_vif *vif),
 589                                  void *data)
 590 {
 591         struct ieee80211_sub_if_data *sdata;
 592         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 593
 594         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 595                 switch (sdata->vif.type) {
 596                 case NL80211_IFTYPE_MONITOR:
 597                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 598                                 continue;
 599                         break;
 600                 case NL80211_IFTYPE_AP_VLAN:
 601                         continue;
 602                 default:
 603                         break;
 604                 }
 605                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 606                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 607                         continue;
 608                 if (ieee80211_sdata_running(sdata) || !active_only)
 609                         iterator(data, sdata->vif.addr,
 610                                  &sdata->vif);
 611         }
 612
 613         sdata = rcu_dereference_check(local->monitor_sdata,
 614                                       lockdep_is_held(&local->iflist_mtx) ||
 615                                       lockdep_rtnl_is_held());
 616         if (sdata &&
 617             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 618              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 619                 iterator(data, sdata->vif.addr, &sdata->vif);
 620 }
 621
 622 void ieee80211_iterate_interfaces(
 623         struct ieee80211_hw *hw, u32 iter_flags,
 624         void (*iterator)(void *data, u8 *mac,
 625                          struct ieee80211_vif *vif),
 626         void *data)
 627 {
 628         struct ieee80211_local *local = hw_to_local(hw);
 629
 630         mutex_lock(&local->iflist_mtx);
 631         __iterate_interfaces(local, iter_flags, iterator, data);
 632         mutex_unlock(&local->iflist_mtx);
 633 }
 634 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 635
 636 void ieee80211_iterate_active_interfaces_atomic(
 637         struct ieee80211_hw *hw, u32 iter_flags,
 638         void (*iterator)(void *data, u8 *mac,
 639                          struct ieee80211_vif *vif),
 640         void *data)
 641 {
 642         struct ieee80211_local *local = hw_to_local(hw);
 643
 644         rcu_read_lock();
 645         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 646                              iterator, data);
 647         rcu_read_unlock();
 648 }
 649 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 650
 651 void ieee80211_iterate_active_interfaces_rtnl(
 652         struct ieee80211_hw *hw, u32 iter_flags,
 653         void (*iterator)(void *data, u8 *mac,
 654                          struct ieee80211_vif *vif),
 655         void *data)
 656 {
 657         struct ieee80211_local *local = hw_to_local(hw);
 658
 659         ASSERT_RTNL();
 660
 661         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 662                              iterator, data);
 663 }
 664 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 665
 666 static void __iterate_stations(struct ieee80211_local *local,
 667                                void (*iterator)(void *data,
 668                                                 struct ieee80211_sta *sta),
 669                                void *data)
 670 {
 671         struct sta_info *sta;
 672
 673         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 674                 if (!sta->uploaded)
 675                         continue;
 676
 677                 iterator(data, &sta->sta);
 678         }
 679 }
 680
 681 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 682                         void (*iterator)(void *data,
 683                                          struct ieee80211_sta *sta),
 684                         void *data)
 685 {
 686         struct ieee80211_local *local = hw_to_local(hw);
 687
 688         rcu_read_lock();
 689         __iterate_stations(local, iterator, data);
 690         rcu_read_unlock();
 691 }
 692 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 693
 694 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 695 {
 696         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 697
 698         if (!ieee80211_sdata_running(sdata) ||
 699             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 700                 return NULL;
 701         return &sdata->vif;
 702 }
 703 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 704
 705 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 706 {
 707         struct ieee80211_sub_if_data *sdata;
 708
 709         if (!vif)
 710                 return NULL;
 711
 712         sdata = vif_to_sdata(vif);
 713
 714         if (!ieee80211_sdata_running(sdata) ||
 715             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 716                 return NULL;
 717
 718         return &sdata->wdev;
 719 }
 720 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 721
 722 /*
 723  * Nothing should have been stuffed into the workqueue during
 724  * the suspend->resume cycle. Since we can't check each caller
 725  * of this function if we are already quiescing / suspended,
 726  * check here and don't WARN since this can actually happen when
 727  * the rx path (for example) is racing against __ieee80211_suspend
 728  * and suspending / quiescing was set after the rx path checked
 729  * them.
 730  */
 731 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 732 {
 733         if (local->quiescing || (local->suspended && !local->resuming)) {
 734                 pr_warn("queueing ieee80211 work while going to suspend\n");
 735                 return false;
 736         }
 737
 738         return true;
 739 }
 740
 741 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 742 {
 743         struct ieee80211_local *local = hw_to_local(hw);
 744
 745         if (!ieee80211_can_queue_work(local))
 746                 return;
 747
 748         queue_work(local->workqueue, work);
 749 }
 750 EXPORT_SYMBOL(ieee80211_queue_work);
 751
 752 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 753                                   struct delayed_work *dwork,
 754                                   unsigned long delay)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         if (!ieee80211_can_queue_work(local))
 759                 return;
 760
 761         queue_delayed_work(local->workqueue, dwork, delay);
 762 }
 763 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 764
 765 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 766                                struct ieee802_11_elems *elems,
 767                                u64 filter, u32 crc)
 768 {
 769         size_t left = len;
 770         const u8 *pos = start;
 771         bool calc_crc = filter != 0;
 772         DECLARE_BITMAP(seen_elems, 256);
 773         const u8 *ie;
 774
 775         bitmap_zero(seen_elems, 256);
 776         memset(elems, 0, sizeof(*elems));
 777         elems->ie_start = start;
 778         elems->total_len = len;
 779
 780         while (left >= 2) {
 781                 u8 id, elen;
 782                 bool elem_parse_failed;
 783
 784                 id = *pos++;
 785                 elen = *pos++;
 786                 left -= 2;
 787
 788                 if (elen > left) {
 789                         elems->parse_error = true;
 790                         break;
 791                 }
 792
 793                 switch (id) {
 794                 case WLAN_EID_SSID:
 795                 case WLAN_EID_SUPP_RATES:
 796                 case WLAN_EID_FH_PARAMS:
 797                 case WLAN_EID_DS_PARAMS:
 798                 case WLAN_EID_CF_PARAMS:
 799                 case WLAN_EID_TIM:
 800                 case WLAN_EID_IBSS_PARAMS:
 801                 case WLAN_EID_CHALLENGE:
 802                 case WLAN_EID_RSN:
 803                 case WLAN_EID_ERP_INFO:
 804                 case WLAN_EID_EXT_SUPP_RATES:
 805                 case WLAN_EID_HT_CAPABILITY:
 806                 case WLAN_EID_HT_OPERATION:
 807                 case WLAN_EID_VHT_CAPABILITY:
 808                 case WLAN_EID_VHT_OPERATION:
 809                 case WLAN_EID_MESH_ID:
 810                 case WLAN_EID_MESH_CONFIG:
 811                 case WLAN_EID_PEER_MGMT:
 812                 case WLAN_EID_PREQ:
 813                 case WLAN_EID_PREP:
 814                 case WLAN_EID_PERR:
 815                 case WLAN_EID_RANN:
 816                 case WLAN_EID_CHANNEL_SWITCH:
 817                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 818                 case WLAN_EID_COUNTRY:
 819                 case WLAN_EID_PWR_CONSTRAINT:
 820                 case WLAN_EID_TIMEOUT_INTERVAL:
 821                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 822                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 823                 case WLAN_EID_CHAN_SWITCH_PARAM:
 824                 case WLAN_EID_EXT_CAPABILITY:
 825                 case WLAN_EID_CHAN_SWITCH_TIMING:
 826                 case WLAN_EID_LINK_ID:
 827                 /*
 828                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 829                  * that if the content gets bigger it might be needed more than once
 830                  */
 831                         if (test_bit(id, seen_elems)) {
 832                                 elems->parse_error = true;
 833                                 left -= elen;
 834                                 pos += elen;
 835                                 continue;
 836                         }
 837                         break;
 838                 }
 839
 840                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 841                         crc = crc32_be(crc, pos - 2, elen + 2);
 842
 843                 elem_parse_failed = false;
 844
 845                 switch (id) {
 846                 case WLAN_EID_LINK_ID:
 847                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 848                                 elem_parse_failed = true;
 849                                 break;
 850                         }
 851                         elems->lnk_id = (void *)(pos - 2);
 852                         break;
 853                 case WLAN_EID_CHAN_SWITCH_TIMING:
 854                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 855                                 elem_parse_failed = true;
 856                                 break;
 857                         }
 858                         elems->ch_sw_timing = (void *)pos;
 859                         break;
 860                 case WLAN_EID_EXT_CAPABILITY:
 861                         elems->ext_capab = pos;
 862                         elems->ext_capab_len = elen;
 863                         break;
 864                 case WLAN_EID_SSID:
 865                         elems->ssid = pos;
 866                         elems->ssid_len = elen;
 867                         break;
 868                 case WLAN_EID_SUPP_RATES:
 869                         elems->supp_rates = pos;
 870                         elems->supp_rates_len = elen;
 871                         break;
 872                 case WLAN_EID_DS_PARAMS:
 873                         if (elen >= 1)
 874                                 elems->ds_params = pos;
 875                         else
 876                                 elem_parse_failed = true;
 877                         break;
 878                 case WLAN_EID_TIM:
 879                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 880                                 elems->tim = (void *)pos;
 881                                 elems->tim_len = elen;
 882                         } else
 883                                 elem_parse_failed = true;
 884                         break;
 885                 case WLAN_EID_CHALLENGE:
 886                         elems->challenge = pos;
 887                         elems->challenge_len = elen;
 888                         break;
 889                 case WLAN_EID_VENDOR_SPECIFIC:
 890                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 891                             pos[2] == 0xf2) {
 892                                 /* Microsoft OUI (00:50:F2) */
 893
 894                                 if (calc_crc)
 895                                         crc = crc32_be(crc, pos - 2, elen + 2);
 896
 897                                 if (elen >= 5 && pos[3] == 2) {
 898                                         /* OUI Type 2 - WMM IE */
 899                                         if (pos[4] == 0) {
 900                                                 elems->wmm_info = pos;
 901                                                 elems->wmm_info_len = elen;
 902                                         } else if (pos[4] == 1) {
 903                                                 elems->wmm_param = pos;
 904                                                 elems->wmm_param_len = elen;
 905                                         }
 906                                 }
 907                         }
 908                         break;
 909                 case WLAN_EID_RSN:
 910                         elems->rsn = pos;
 911                         elems->rsn_len = elen;
 912                         break;
 913                 case WLAN_EID_ERP_INFO:
 914                         if (elen >= 1)
 915                                 elems->erp_info = pos;
 916                         else
 917                                 elem_parse_failed = true;
 918                         break;
 919                 case WLAN_EID_EXT_SUPP_RATES:
 920                         elems->ext_supp_rates = pos;
 921                         elems->ext_supp_rates_len = elen;
 922                         break;
 923                 case WLAN_EID_HT_CAPABILITY:
 924                         if (elen >= sizeof(struct ieee80211_ht_cap))
 925                                 elems->ht_cap_elem = (void *)pos;
 926                         else
 927                                 elem_parse_failed = true;
 928                         break;
 929                 case WLAN_EID_HT_OPERATION:
 930                         if (elen >= sizeof(struct ieee80211_ht_operation))
 931                                 elems->ht_operation = (void *)pos;
 932                         else
 933                                 elem_parse_failed = true;
 934                         break;
 935                 case WLAN_EID_VHT_CAPABILITY:
 936                         if (elen >= sizeof(struct ieee80211_vht_cap))
 937                                 elems->vht_cap_elem = (void *)pos;
 938                         else
 939                                 elem_parse_failed = true;
 940                         break;
 941                 case WLAN_EID_VHT_OPERATION:
 942                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
 943                                 elems->vht_operation = (void *)pos;
 944                                 if (calc_crc)
 945                                         crc = crc32_be(crc, pos - 2, elen + 2);
 946                                 break;
 947                         }
 948                         elem_parse_failed = true;
 949                         break;
 950                 case WLAN_EID_OPMODE_NOTIF:
 951                         if (elen > 0) {
 952                                 elems->opmode_notif = pos;
 953                                 if (calc_crc)
 954                                         crc = crc32_be(crc, pos - 2, elen + 2);
 955                                 break;
 956                         }
 957                         elem_parse_failed = true;
 958                         break;
 959                 case WLAN_EID_MESH_ID:
 960                         elems->mesh_id = pos;
 961                         elems->mesh_id_len = elen;
 962                         break;
 963                 case WLAN_EID_MESH_CONFIG:
 964                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 965                                 elems->mesh_config = (void *)pos;
 966                         else
 967                                 elem_parse_failed = true;
 968                         break;
 969                 case WLAN_EID_PEER_MGMT:
 970                         elems->peering = pos;
 971                         elems->peering_len = elen;
 972                         break;
 973                 case WLAN_EID_MESH_AWAKE_WINDOW:
 974                         if (elen >= 2)
 975                                 elems->awake_window = (void *)pos;
 976                         break;
 977                 case WLAN_EID_PREQ:
 978                         elems->preq = pos;
 979                         elems->preq_len = elen;
 980                         break;
 981                 case WLAN_EID_PREP:
 982                         elems->prep = pos;
 983                         elems->prep_len = elen;
 984                         break;
 985                 case WLAN_EID_PERR:
 986                         elems->perr = pos;
 987                         elems->perr_len = elen;
 988                         break;
 989                 case WLAN_EID_RANN:
 990                         if (elen >= sizeof(struct ieee80211_rann_ie))
 991                                 elems->rann = (void *)pos;
 992                         else
 993                                 elem_parse_failed = true;
 994                         break;
 995                 case WLAN_EID_CHANNEL_SWITCH:
 996                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 997                                 elem_parse_failed = true;
 998                                 break;
 999                         }
1000                         elems->ch_switch_ie = (void *)pos;
1001                         break;
1002                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004                                 elem_parse_failed = true;
1005                                 break;
1006                         }
1007                         elems->ext_chansw_ie = (void *)pos;
1008                         break;
1009                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->sec_chan_offs = (void *)pos;
1015                         break;
1016                 case WLAN_EID_CHAN_SWITCH_PARAM:
1017                         if (elen !=
1018                             sizeof(*elems->mesh_chansw_params_ie)) {
1019                                 elem_parse_failed = true;
1020                                 break;
1021                         }
1022                         elems->mesh_chansw_params_ie = (void *)pos;
1023                         break;
1024                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025                         if (!action ||
1026                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027                                 elem_parse_failed = true;
1028                                 break;
1029                         }
1030                         elems->wide_bw_chansw_ie = (void *)pos;
1031                         break;
1032                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033                         if (action) {
1034                                 elem_parse_failed = true;
1035                                 break;
1036                         }
1037                         /*
1038                          * This is a bit tricky, but as we only care about
1039                          * the wide bandwidth channel switch element, so
1040                          * just parse it out manually.
1041                          */
1042                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043                                               pos, elen);
1044                         if (ie) {
1045                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046                                         elems->wide_bw_chansw_ie =
1047                                                 (void *)(ie + 2);
1048                                 else
1049                                         elem_parse_failed = true;
1050                         }
1051                         break;
1052                 case WLAN_EID_COUNTRY:
1053                         elems->country_elem = pos;
1054                         elems->country_elem_len = elen;
1055                         break;
1056                 case WLAN_EID_PWR_CONSTRAINT:
1057                         if (elen != 1) {
1058                                 elem_parse_failed = true;
1059                                 break;
1060                         }
1061                         elems->pwr_constr_elem = pos;
1062                         break;
1063                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064                         /* Lots of different options exist, but we only care
1065                          * about the Dynamic Transmit Power Control element.
1066                          * First check for the Cisco OUI, then for the DTPC
1067                          * tag (0x00).
1068                          */
1069                         if (elen < 4) {
1070                                 elem_parse_failed = true;
1071                                 break;
1072                         }
1073
1074                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075                             pos[2] != 0x96 || pos[3] != 0x00)
1076                                 break;
1077
1078                         if (elen != 6) {
1079                                 elem_parse_failed = true;
1080                                 break;
1081                         }
1082
1083                         if (calc_crc)
1084                                 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086                         elems->cisco_dtpc_elem = pos;
1087                         break;
1088                 case WLAN_EID_TIMEOUT_INTERVAL:
1089                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090                                 elems->timeout_int = (void *)pos;
1091                         else
1092                                 elem_parse_failed = true;
1093                         break;
1094                 default:
1095                         break;
1096                 }
1097
1098                 if (elem_parse_failed)
1099                         elems->parse_error = true;
1100                 else
1101                         __set_bit(id, seen_elems);
1102
1103                 left -= elen;
1104                 pos += elen;
1105         }
1106
1107         if (left != 0)
1108                 elems->parse_error = true;
1109
1110         return crc;
1111 }
1112
1113 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1114                                bool bss_notify, bool enable_qos)
1115 {
1116         struct ieee80211_local *local = sdata->local;
1117         struct ieee80211_tx_queue_params qparam;
1118         struct ieee80211_chanctx_conf *chanctx_conf;
1119         int ac;
1120         bool use_11b;
1121         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1122         int aCWmin, aCWmax;
1123
1124         if (!local->ops->conf_tx)
1125                 return;
1126
1127         if (local->hw.queues < IEEE80211_NUM_ACS)
1128                 return;
1129
1130         memset(&qparam, 0, sizeof(qparam));
1131
1132         rcu_read_lock();
1133         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1134         use_11b = (chanctx_conf &&
1135                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1136                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1137         rcu_read_unlock();
1138
1139         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1140
1141         /* Set defaults according to 802.11-2007 Table 7-37 */
1142         aCWmax = 1023;
1143         if (use_11b)
1144                 aCWmin = 31;
1145         else
1146                 aCWmin = 15;
1147
1148         /* Confiure old 802.11b/g medium access rules. */
1149         qparam.cw_max = aCWmax;
1150         qparam.cw_min = aCWmin;
1151         qparam.txop = 0;
1152         qparam.aifs = 2;
1153
1154         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1155                 /* Update if QoS is enabled. */
1156                 if (enable_qos) {
1157                         switch (ac) {
1158                         case IEEE80211_AC_BK:
1159                                 qparam.cw_max = aCWmax;
1160                                 qparam.cw_min = aCWmin;
1161                                 qparam.txop = 0;
1162                                 if (is_ocb)
1163                                         qparam.aifs = 9;
1164                                 else
1165                                         qparam.aifs = 7;
1166                                 break;
1167                         /* never happens but let's not leave undefined */
1168                         default:
1169                         case IEEE80211_AC_BE:
1170                                 qparam.cw_max = aCWmax;
1171                                 qparam.cw_min = aCWmin;
1172                                 qparam.txop = 0;
1173                                 if (is_ocb)
1174                                         qparam.aifs = 6;
1175                                 else
1176                                         qparam.aifs = 3;
1177                                 break;
1178                         case IEEE80211_AC_VI:
1179                                 qparam.cw_max = aCWmin;
1180                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1181                                 if (is_ocb)
1182                                         qparam.txop = 0;
1183                                 else if (use_11b)
1184                                         qparam.txop = 6016/32;
1185                                 else
1186                                         qparam.txop = 3008/32;
1187
1188                                 if (is_ocb)
1189                                         qparam.aifs = 3;
1190                                 else
1191                                         qparam.aifs = 2;
1192                                 break;
1193                         case IEEE80211_AC_VO:
1194                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1195                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1196                                 if (is_ocb)
1197                                         qparam.txop = 0;
1198                                 else if (use_11b)
1199                                         qparam.txop = 3264/32;
1200                                 else
1201                                         qparam.txop = 1504/32;
1202                                 qparam.aifs = 2;
1203                                 break;
1204                         }
1205                 }
1206
1207                 qparam.uapsd = false;
1208
1209                 sdata->tx_conf[ac] = qparam;
1210                 drv_conf_tx(local, sdata, ac, &qparam);
1211         }
1212
1213         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1214             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1215                 sdata->vif.bss_conf.qos = enable_qos;
1216                 if (bss_notify)
1217                         ieee80211_bss_info_change_notify(sdata,
1218                                                          BSS_CHANGED_QOS);
1219         }
1220 }
1221
1222 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1223                          u16 transaction, u16 auth_alg, u16 status,
1224                          const u8 *extra, size_t extra_len, const u8 *da,
1225                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1226                          u32 tx_flags)
1227 {
1228         struct ieee80211_local *local = sdata->local;
1229         struct sk_buff *skb;
1230         struct ieee80211_mgmt *mgmt;
1231         int err;
1232
1233         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1234         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1235                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1236         if (!skb)
1237                 return;
1238
1239         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1240
1241         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1242         memset(mgmt, 0, 24 + 6);
1243         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1244                                           IEEE80211_STYPE_AUTH);
1245         memcpy(mgmt->da, da, ETH_ALEN);
1246         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1247         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1248         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1249         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1250         mgmt->u.auth.status_code = cpu_to_le16(status);
1251         if (extra)
1252                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1253
1254         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1255                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1256                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1257                 WARN_ON(err);
1258         }
1259
1260         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1261                                         tx_flags;
1262         ieee80211_tx_skb(sdata, skb);
1263 }
1264
1265 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1266                                     const u8 *bssid, u16 stype, u16 reason,
1267                                     bool send_frame, u8 *frame_buf)
1268 {
1269         struct ieee80211_local *local = sdata->local;
1270         struct sk_buff *skb;
1271         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1272
1273         /* build frame */
1274         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1275         mgmt->duration = 0; /* initialize only */
1276         mgmt->seq_ctrl = 0; /* initialize only */
1277         memcpy(mgmt->da, bssid, ETH_ALEN);
1278         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1279         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1280         /* u.deauth.reason_code == u.disassoc.reason_code */
1281         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1282
1283         if (send_frame) {
1284                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1285                                     IEEE80211_DEAUTH_FRAME_LEN);
1286                 if (!skb)
1287                         return;
1288
1289                 skb_reserve(skb, local->hw.extra_tx_headroom);
1290
1291                 /* copy in frame */
1292                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1293                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1294
1295                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1296                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1297                         IEEE80211_SKB_CB(skb)->flags |=
1298                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1299
1300                 ieee80211_tx_skb(sdata, skb);
1301         }
1302 }
1303
1304 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1305                                          u8 *buffer, size_t buffer_len,
1306                                          const u8 *ie, size_t ie_len,
1307                                          enum ieee80211_band band,
1308                                          u32 rate_mask,
1309                                          struct cfg80211_chan_def *chandef,
1310                                          size_t *offset)
1311 {
1312         struct ieee80211_supported_band *sband;
1313         u8 *pos = buffer, *end = buffer + buffer_len;
1314         size_t noffset;
1315         int supp_rates_len, i;
1316         u8 rates[32];
1317         int num_rates;
1318         int ext_rates_len;
1319         int shift;
1320         u32 rate_flags;
1321         bool have_80mhz = false;
1322
1323         *offset = 0;
1324
1325         sband = local->hw.wiphy->bands[band];
1326         if (WARN_ON_ONCE(!sband))
1327                 return 0;
1328
1329         rate_flags = ieee80211_chandef_rate_flags(chandef);
1330         shift = ieee80211_chandef_get_shift(chandef);
1331
1332         num_rates = 0;
1333         for (i = 0; i < sband->n_bitrates; i++) {
1334                 if ((BIT(i) & rate_mask) == 0)
1335                         continue; /* skip rate */
1336                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1337                         continue;
1338
1339                 rates[num_rates++] =
1340                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1341                                           (1 << shift) * 5);
1342         }
1343
1344         supp_rates_len = min_t(int, num_rates, 8);
1345
1346         if (end - pos < 2 + supp_rates_len)
1347                 goto out_err;
1348         *pos++ = WLAN_EID_SUPP_RATES;
1349         *pos++ = supp_rates_len;
1350         memcpy(pos, rates, supp_rates_len);
1351         pos += supp_rates_len;
1352
1353         /* insert "request information" if in custom IEs */
1354         if (ie && ie_len) {
1355                 static const u8 before_extrates[] = {
1356                         WLAN_EID_SSID,
1357                         WLAN_EID_SUPP_RATES,
1358                         WLAN_EID_REQUEST,
1359                 };
1360                 noffset = ieee80211_ie_split(ie, ie_len,
1361                                              before_extrates,
1362                                              ARRAY_SIZE(before_extrates),
1363                                              *offset);
1364                 if (end - pos < noffset - *offset)
1365                         goto out_err;
1366                 memcpy(pos, ie + *offset, noffset - *offset);
1367                 pos += noffset - *offset;
1368                 *offset = noffset;
1369         }
1370
1371         ext_rates_len = num_rates - supp_rates_len;
1372         if (ext_rates_len > 0) {
1373                 if (end - pos < 2 + ext_rates_len)
1374                         goto out_err;
1375                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1376                 *pos++ = ext_rates_len;
1377                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1378                 pos += ext_rates_len;
1379         }
1380
1381         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1382                 if (end - pos < 3)
1383                         goto out_err;
1384                 *pos++ = WLAN_EID_DS_PARAMS;
1385                 *pos++ = 1;
1386                 *pos++ = ieee80211_frequency_to_channel(
1387                                 chandef->chan->center_freq);
1388         }
1389
1390         /* insert custom IEs that go before HT */
1391         if (ie && ie_len) {
1392                 static const u8 before_ht[] = {
1393                         WLAN_EID_SSID,
1394                         WLAN_EID_SUPP_RATES,
1395                         WLAN_EID_REQUEST,
1396                         WLAN_EID_EXT_SUPP_RATES,
1397                         WLAN_EID_DS_PARAMS,
1398                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1399                 };
1400                 noffset = ieee80211_ie_split(ie, ie_len,
1401                                              before_ht, ARRAY_SIZE(before_ht),
1402                                              *offset);
1403                 if (end - pos < noffset - *offset)
1404                         goto out_err;
1405                 memcpy(pos, ie + *offset, noffset - *offset);
1406                 pos += noffset - *offset;
1407                 *offset = noffset;
1408         }
1409
1410         if (sband->ht_cap.ht_supported) {
1411                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1412                         goto out_err;
1413                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1414                                                 sband->ht_cap.cap);
1415         }
1416
1417         /*
1418          * If adding more here, adjust code in main.c
1419          * that calculates local->scan_ies_len.
1420          */
1421
1422         /* insert custom IEs that go before VHT */
1423         if (ie && ie_len) {
1424                 static const u8 before_vht[] = {
1425                         WLAN_EID_SSID,
1426                         WLAN_EID_SUPP_RATES,
1427                         WLAN_EID_REQUEST,
1428                         WLAN_EID_EXT_SUPP_RATES,
1429                         WLAN_EID_DS_PARAMS,
1430                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1431                         WLAN_EID_HT_CAPABILITY,
1432                         WLAN_EID_BSS_COEX_2040,
1433                         WLAN_EID_EXT_CAPABILITY,
1434                         WLAN_EID_SSID_LIST,
1435                         WLAN_EID_CHANNEL_USAGE,
1436                         WLAN_EID_INTERWORKING,
1437                         /* mesh ID can't happen here */
1438                         /* 60 GHz can't happen here right now */
1439                 };
1440                 noffset = ieee80211_ie_split(ie, ie_len,
1441                                              before_vht, ARRAY_SIZE(before_vht),
1442                                              *offset);
1443                 if (end - pos < noffset - *offset)
1444                         goto out_err;
1445                 memcpy(pos, ie + *offset, noffset - *offset);
1446                 pos += noffset - *offset;
1447                 *offset = noffset;
1448         }
1449
1450         /* Check if any channel in this sband supports at least 80 MHz */
1451         for (i = 0; i < sband->n_channels; i++) {
1452                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1453                                                 IEEE80211_CHAN_NO_80MHZ))
1454                         continue;
1455
1456                 have_80mhz = true;
1457                 break;
1458         }
1459
1460         if (sband->vht_cap.vht_supported && have_80mhz) {
1461                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1462                         goto out_err;
1463                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1464                                                  sband->vht_cap.cap);
1465         }
1466
1467         return pos - buffer;
1468  out_err:
1469         WARN_ONCE(1, "not enough space for preq IEs\n");
1470         return pos - buffer;
1471 }
1472
1473 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1474                              size_t buffer_len,
1475                              struct ieee80211_scan_ies *ie_desc,
1476                              const u8 *ie, size_t ie_len,
1477                              u8 bands_used, u32 *rate_masks,
1478                              struct cfg80211_chan_def *chandef)
1479 {
1480         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1481         int i;
1482
1483         memset(ie_desc, 0, sizeof(*ie_desc));
1484
1485         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1486                 if (bands_used & BIT(i)) {
1487                         pos += ieee80211_build_preq_ies_band(local,
1488                                                              buffer + pos,
1489                                                              buffer_len - pos,
1490                                                              ie, ie_len, i,
1491                                                              rate_masks[i],
1492                                                              chandef,
1493                                                              &custom_ie_offset);
1494                         ie_desc->ies[i] = buffer + old_pos;
1495                         ie_desc->len[i] = pos - old_pos;
1496                         old_pos = pos;
1497                 }
1498         }
1499
1500         /* add any remaining custom IEs */
1501         if (ie && ie_len) {
1502                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1503                               "not enough space for preq custom IEs\n"))
1504                         return pos;
1505                 memcpy(buffer + pos, ie + custom_ie_offset,
1506                        ie_len - custom_ie_offset);
1507                 ie_desc->common_ies = buffer + pos;
1508                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1509                 pos += ie_len - custom_ie_offset;
1510         }
1511
1512         return pos;
1513 };
1514
1515 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1516                                           const u8 *src, const u8 *dst,
1517                                           u32 ratemask,
1518                                           struct ieee80211_channel *chan,
1519                                           const u8 *ssid, size_t ssid_len,
1520                                           const u8 *ie, size_t ie_len,
1521                                           bool directed)
1522 {
1523         struct ieee80211_local *local = sdata->local;
1524         struct cfg80211_chan_def chandef;
1525         struct sk_buff *skb;
1526         struct ieee80211_mgmt *mgmt;
1527         int ies_len;
1528         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1529         struct ieee80211_scan_ies dummy_ie_desc;
1530
1531         /*
1532          * Do not send DS Channel parameter for directed probe requests
1533          * in order to maximize the chance that we get a response.  Some
1534          * badly-behaved APs don't respond when this parameter is included.
1535          */
1536         chandef.width = sdata->vif.bss_conf.chandef.width;
1537         if (directed)
1538                 chandef.chan = NULL;
1539         else
1540                 chandef.chan = chan;
1541
1542         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1543                                      100 + ie_len);
1544         if (!skb)
1545                 return NULL;
1546
1547         rate_masks[chan->band] = ratemask;
1548         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1549                                            skb_tailroom(skb), &dummy_ie_desc,
1550                                            ie, ie_len, BIT(chan->band),
1551                                            rate_masks, &chandef);
1552         skb_put(skb, ies_len);
1553
1554         if (dst) {
1555                 mgmt = (struct ieee80211_mgmt *) skb->data;
1556                 memcpy(mgmt->da, dst, ETH_ALEN);
1557                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1558         }
1559
1560         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1561
1562         return skb;
1563 }
1564
1565 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1566                               const u8 *src, const u8 *dst,
1567                               const u8 *ssid, size_t ssid_len,
1568                               const u8 *ie, size_t ie_len,
1569                               u32 ratemask, bool directed, u32 tx_flags,
1570                               struct ieee80211_channel *channel, bool scan)
1571 {
1572         struct sk_buff *skb;
1573
1574         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1575                                         ssid, ssid_len,
1576                                         ie, ie_len, directed);
1577         if (skb) {
1578                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1579                 if (scan)
1580                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1581                 else
1582                         ieee80211_tx_skb(sdata, skb);
1583         }
1584 }
1585
1586 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1587                             struct ieee802_11_elems *elems,
1588                             enum ieee80211_band band, u32 *basic_rates)
1589 {
1590         struct ieee80211_supported_band *sband;
1591         size_t num_rates;
1592         u32 supp_rates, rate_flags;
1593         int i, j, shift;
1594         sband = sdata->local->hw.wiphy->bands[band];
1595
1596         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1597         shift = ieee80211_vif_get_shift(&sdata->vif);
1598
1599         if (WARN_ON(!sband))
1600                 return 1;
1601
1602         num_rates = sband->n_bitrates;
1603         supp_rates = 0;
1604         for (i = 0; i < elems->supp_rates_len +
1605                      elems->ext_supp_rates_len; i++) {
1606                 u8 rate = 0;
1607                 int own_rate;
1608                 bool is_basic;
1609                 if (i < elems->supp_rates_len)
1610                         rate = elems->supp_rates[i];
1611                 else if (elems->ext_supp_rates)
1612                         rate = elems->ext_supp_rates
1613                                 [i - elems->supp_rates_len];
1614                 own_rate = 5 * (rate & 0x7f);
1615                 is_basic = !!(rate & 0x80);
1616
1617                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1618                         continue;
1619
1620                 for (j = 0; j < num_rates; j++) {
1621                         int brate;
1622                         if ((rate_flags & sband->bitrates[j].flags)
1623                             != rate_flags)
1624                                 continue;
1625
1626                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1627                                              1 << shift);
1628
1629                         if (brate == own_rate) {
1630                                 supp_rates |= BIT(j);
1631                                 if (basic_rates && is_basic)
1632                                         *basic_rates |= BIT(j);
1633                         }
1634                 }
1635         }
1636         return supp_rates;
1637 }
1638
1639 void ieee80211_stop_device(struct ieee80211_local *local)
1640 {
1641         ieee80211_led_radio(local, false);
1642         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1643
1644         cancel_work_sync(&local->reconfig_filter);
1645
1646         flush_workqueue(local->workqueue);
1647         drv_stop(local);
1648 }
1649
1650 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1651                                            bool aborted)
1652 {
1653         /* It's possible that we don't handle the scan completion in
1654          * time during suspend, so if it's still marked as completed
1655          * here, queue the work and flush it to clean things up.
1656          * Instead of calling the worker function directly here, we
1657          * really queue it to avoid potential races with other flows
1658          * scheduling the same work.
1659          */
1660         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1661                 /* If coming from reconfiguration failure, abort the scan so
1662                  * we don't attempt to continue a partial HW scan - which is
1663                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1664                  * completed scan, and a 5 GHz portion is still pending.
1665                  */
1666                 if (aborted)
1667                         set_bit(SCAN_ABORTED, &local->scanning);
1668                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1669                 flush_delayed_work(&local->scan_work);
1670         }
1671 }
1672
1673 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1674 {
1675         struct ieee80211_sub_if_data *sdata;
1676         struct ieee80211_chanctx *ctx;
1677
1678         /*
1679          * We get here if during resume the device can't be restarted properly.
1680          * We might also get here if this happens during HW reset, which is a
1681          * slightly different situation and we need to drop all connections in
1682          * the latter case.
1683          *
1684          * Ask cfg80211 to turn off all interfaces, this will result in more
1685          * warnings but at least we'll then get into a clean stopped state.
1686          */
1687
1688         local->resuming = false;
1689         local->suspended = false;
1690         local->in_reconfig = false;
1691
1692         ieee80211_flush_completed_scan(local, true);
1693
1694         /* scheduled scan clearly can't be running any more, but tell
1695          * cfg80211 and clear local state
1696          */
1697         ieee80211_sched_scan_end(local);
1698
1699         list_for_each_entry(sdata, &local->interfaces, list)
1700                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1701
1702         /* Mark channel contexts as not being in the driver any more to avoid
1703          * removing them from the driver during the shutdown process...
1704          */
1705         mutex_lock(&local->chanctx_mtx);
1706         list_for_each_entry(ctx, &local->chanctx_list, list)
1707                 ctx->driver_present = false;
1708         mutex_unlock(&local->chanctx_mtx);
1709
1710         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1711 }
1712
1713 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1714                                      struct ieee80211_sub_if_data *sdata)
1715 {
1716         struct ieee80211_chanctx_conf *conf;
1717         struct ieee80211_chanctx *ctx;
1718
1719         if (!local->use_chanctx)
1720                 return;
1721
1722         mutex_lock(&local->chanctx_mtx);
1723         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1724                                          lockdep_is_held(&local->chanctx_mtx));
1725         if (conf) {
1726                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1727                 drv_assign_vif_chanctx(local, sdata, ctx);
1728         }
1729         mutex_unlock(&local->chanctx_mtx);
1730 }
1731
1732 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1733 {
1734         struct ieee80211_local *local = sdata->local;
1735         struct sta_info *sta;
1736
1737         /* add STAs back */
1738         mutex_lock(&local->sta_mtx);
1739         list_for_each_entry(sta, &local->sta_list, list) {
1740                 enum ieee80211_sta_state state;
1741
1742                 if (!sta->uploaded || sta->sdata != sdata)
1743                         continue;
1744
1745                 for (state = IEEE80211_STA_NOTEXIST;
1746                      state < sta->sta_state; state++)
1747                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1748                                               state + 1));
1749         }
1750         mutex_unlock(&local->sta_mtx);
1751 }
1752
1753 int ieee80211_reconfig(struct ieee80211_local *local)
1754 {
1755         struct ieee80211_hw *hw = &local->hw;
1756         struct ieee80211_sub_if_data *sdata;
1757         struct ieee80211_chanctx *ctx;
1758         struct sta_info *sta;
1759         int res, i;
1760         bool reconfig_due_to_wowlan = false;
1761         struct ieee80211_sub_if_data *sched_scan_sdata;
1762         struct cfg80211_sched_scan_request *sched_scan_req;
1763         bool sched_scan_stopped = false;
1764         bool suspended = local->suspended;
1765
1766         /* nothing to do if HW shouldn't run */
1767         if (!local->open_count)
1768                 goto wake_up;
1769
1770 #ifdef CONFIG_PM
1771         if (suspended)
1772                 local->resuming = true;
1773
1774         if (local->wowlan) {
1775                 /*
1776                  * In the wowlan case, both mac80211 and the device
1777                  * are functional when the resume op is called, so
1778                  * clear local->suspended so the device could operate
1779                  * normally (e.g. pass rx frames).
1780                  */
1781                 local->suspended = false;
1782                 res = drv_resume(local);
1783                 local->wowlan = false;
1784                 if (res < 0) {
1785                         local->resuming = false;
1786                         return res;
1787                 }
1788                 if (res == 0)
1789                         goto wake_up;
1790                 WARN_ON(res > 1);
1791                 /*
1792                  * res is 1, which means the driver requested
1793                  * to go through a regular reset on wakeup.
1794                  * restore local->suspended in this case.
1795                  */
1796                 reconfig_due_to_wowlan = true;
1797                 local->suspended = true;
1798         }
1799 #endif
1800
1801         /*
1802          * In case of hw_restart during suspend (without wowlan),
1803          * cancel restart work, as we are reconfiguring the device
1804          * anyway.
1805          * Note that restart_work is scheduled on a frozen workqueue,
1806          * so we can't deadlock in this case.
1807          */
1808         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1809                 cancel_work_sync(&local->restart_work);
1810
1811         local->started = false;
1812
1813         /*
1814          * Upon resume hardware can sometimes be goofy due to
1815          * various platform / driver / bus issues, so restarting
1816          * the device may at times not work immediately. Propagate
1817          * the error.
1818          */
1819         res = drv_start(local);
1820         if (res) {
1821                 if (suspended)
1822                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1823                 else
1824                         WARN(1, "Hardware became unavailable during restart.\n");
1825                 ieee80211_handle_reconfig_failure(local);
1826                 return res;
1827         }
1828
1829         /* setup fragmentation threshold */
1830         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1831
1832         /* setup RTS threshold */
1833         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1834
1835         /* reset coverage class */
1836         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1837
1838         ieee80211_led_radio(local, true);
1839         ieee80211_mod_tpt_led_trig(local,
1840                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1841
1842         /* add interfaces */
1843         sdata = rtnl_dereference(local->monitor_sdata);
1844         if (sdata) {
1845                 /* in HW restart it exists already */
1846                 WARN_ON(local->resuming);
1847                 res = drv_add_interface(local, sdata);
1848                 if (WARN_ON(res)) {
1849                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1850                         synchronize_net();
1851                         kfree(sdata);
1852                 }
1853         }
1854
1855         list_for_each_entry(sdata, &local->interfaces, list) {
1856                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1857                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1858                     ieee80211_sdata_running(sdata)) {
1859                         res = drv_add_interface(local, sdata);
1860                         if (WARN_ON(res))
1861                                 break;
1862                 }
1863         }
1864
1865         /* If adding any of the interfaces failed above, roll back and
1866          * report failure.
1867          */
1868         if (res) {
1869                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1870                                                      list)
1871                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1872                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1873                             ieee80211_sdata_running(sdata))
1874                                 drv_remove_interface(local, sdata);
1875                 ieee80211_handle_reconfig_failure(local);
1876                 return res;
1877         }
1878
1879         /* add channel contexts */
1880         if (local->use_chanctx) {
1881                 mutex_lock(&local->chanctx_mtx);
1882                 list_for_each_entry(ctx, &local->chanctx_list, list)
1883                         if (ctx->replace_state !=
1884                             IEEE80211_CHANCTX_REPLACES_OTHER)
1885                                 WARN_ON(drv_add_chanctx(local, ctx));
1886                 mutex_unlock(&local->chanctx_mtx);
1887
1888                 sdata = rtnl_dereference(local->monitor_sdata);
1889                 if (sdata && ieee80211_sdata_running(sdata))
1890                         ieee80211_assign_chanctx(local, sdata);
1891         }
1892
1893         /* reconfigure hardware */
1894         ieee80211_hw_config(local, ~0);
1895
1896         ieee80211_configure_filter(local);
1897
1898         /* Finally also reconfigure all the BSS information */
1899         list_for_each_entry(sdata, &local->interfaces, list) {
1900                 u32 changed;
1901
1902                 if (!ieee80211_sdata_running(sdata))
1903                         continue;
1904
1905                 ieee80211_assign_chanctx(local, sdata);
1906
1907                 switch (sdata->vif.type) {
1908                 case NL80211_IFTYPE_AP_VLAN:
1909                 case NL80211_IFTYPE_MONITOR:
1910                         break;
1911                 default:
1912                         ieee80211_reconfig_stations(sdata);
1913                         /* fall through */
1914                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1915                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1916                                 drv_conf_tx(local, sdata, i,
1917                                             &sdata->tx_conf[i]);
1918                         break;
1919                 }
1920
1921                 /* common change flags for all interface types */
1922                 changed = BSS_CHANGED_ERP_CTS_PROT |
1923                           BSS_CHANGED_ERP_PREAMBLE |
1924                           BSS_CHANGED_ERP_SLOT |
1925                           BSS_CHANGED_HT |
1926                           BSS_CHANGED_BASIC_RATES |
1927                           BSS_CHANGED_BEACON_INT |
1928                           BSS_CHANGED_BSSID |
1929                           BSS_CHANGED_CQM |
1930                           BSS_CHANGED_QOS |
1931                           BSS_CHANGED_IDLE |
1932                           BSS_CHANGED_TXPOWER;
1933
1934                 switch (sdata->vif.type) {
1935                 case NL80211_IFTYPE_STATION:
1936                         changed |= BSS_CHANGED_ASSOC |
1937                                    BSS_CHANGED_ARP_FILTER |
1938                                    BSS_CHANGED_PS;
1939
1940                         /* Re-send beacon info report to the driver */
1941                         if (sdata->u.mgd.have_beacon)
1942                                 changed |= BSS_CHANGED_BEACON_INFO;
1943
1944                         sdata_lock(sdata);
1945                         ieee80211_bss_info_change_notify(sdata, changed);
1946                         sdata_unlock(sdata);
1947                         break;
1948                 case NL80211_IFTYPE_OCB:
1949                         changed |= BSS_CHANGED_OCB;
1950                         ieee80211_bss_info_change_notify(sdata, changed);
1951                         break;
1952                 case NL80211_IFTYPE_ADHOC:
1953                         changed |= BSS_CHANGED_IBSS;
1954                         /* fall through */
1955                 case NL80211_IFTYPE_AP:
1956                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1957
1958                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1959                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1960
1961                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1962                                         drv_start_ap(local, sdata);
1963                         }
1964
1965                         /* fall through */
1966                 case NL80211_IFTYPE_MESH_POINT:
1967                         if (sdata->vif.bss_conf.enable_beacon) {
1968                                 changed |= BSS_CHANGED_BEACON |
1969                                            BSS_CHANGED_BEACON_ENABLED;
1970                                 ieee80211_bss_info_change_notify(sdata, changed);
1971                         }
1972                         break;
1973                 case NL80211_IFTYPE_WDS:
1974                 case NL80211_IFTYPE_AP_VLAN:
1975                 case NL80211_IFTYPE_MONITOR:
1976                 case NL80211_IFTYPE_P2P_DEVICE:
1977                         /* nothing to do */
1978                         break;
1979                 case NL80211_IFTYPE_UNSPECIFIED:
1980                 case NUM_NL80211_IFTYPES:
1981                 case NL80211_IFTYPE_P2P_CLIENT:
1982                 case NL80211_IFTYPE_P2P_GO:
1983                         WARN_ON(1);
1984                         break;
1985                 }
1986         }
1987
1988         ieee80211_recalc_ps(local);
1989
1990         /*
1991          * The sta might be in psm against the ap (e.g. because
1992          * this was the state before a hw restart), so we
1993          * explicitly send a null packet in order to make sure
1994          * it'll sync against the ap (and get out of psm).
1995          */
1996         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1997                 list_for_each_entry(sdata, &local->interfaces, list) {
1998                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1999                                 continue;
2000                         if (!sdata->u.mgd.associated)
2001                                 continue;
2002
2003                         ieee80211_send_nullfunc(local, sdata, false);
2004                 }
2005         }
2006
2007         /* APs are now beaconing, add back stations */
2008         mutex_lock(&local->sta_mtx);
2009         list_for_each_entry(sta, &local->sta_list, list) {
2010                 enum ieee80211_sta_state state;
2011
2012                 if (!sta->uploaded)
2013                         continue;
2014
2015                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2016                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2017                         continue;
2018
2019                 for (state = IEEE80211_STA_NOTEXIST;
2020                      state < sta->sta_state; state++)
2021                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2022                                               state + 1));
2023         }
2024         mutex_unlock(&local->sta_mtx);
2025
2026         /* add back keys */
2027         list_for_each_entry(sdata, &local->interfaces, list)
2028                 ieee80211_reset_crypto_tx_tailroom(sdata);
2029
2030         list_for_each_entry(sdata, &local->interfaces, list)
2031                 if (ieee80211_sdata_running(sdata))
2032                         ieee80211_enable_keys(sdata);
2033
2034         /* Reconfigure sched scan if it was interrupted by FW restart */
2035         mutex_lock(&local->mtx);
2036         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2037                                                 lockdep_is_held(&local->mtx));
2038         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2039                                                 lockdep_is_held(&local->mtx));
2040         if (sched_scan_sdata && sched_scan_req)
2041                 /*
2042                  * Sched scan stopped, but we don't want to report it. Instead,
2043                  * we're trying to reschedule. However, if more than one scan
2044                  * plan was set, we cannot reschedule since we don't know which
2045                  * scan plan was currently running (and some scan plans may have
2046                  * already finished).
2047                  */
2048                 if (sched_scan_req->n_scan_plans > 1 ||
2049                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2050                                                          sched_scan_req))
2051                         sched_scan_stopped = true;
2052         mutex_unlock(&local->mtx);
2053
2054         if (sched_scan_stopped)
2055                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2056
2057  wake_up:
2058         local->in_reconfig = false;
2059         barrier();
2060
2061         if (local->monitors == local->open_count && local->monitors > 0)
2062                 ieee80211_add_virtual_monitor(local);
2063
2064         /*
2065          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2066          * sessions can be established after a resume.
2067          *
2068          * Also tear down aggregation sessions since reconfiguring
2069          * them in a hardware restart scenario is not easily done
2070          * right now, and the hardware will have lost information
2071          * about the sessions, but we and the AP still think they
2072          * are active. This is really a workaround though.
2073          */
2074         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2075                 mutex_lock(&local->sta_mtx);
2076
2077                 list_for_each_entry(sta, &local->sta_list, list) {
2078                         if (!local->resuming)
2079                                 ieee80211_sta_tear_down_BA_sessions(
2080                                                 sta, AGG_STOP_LOCAL_REQUEST);
2081                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2082                 }
2083
2084                 mutex_unlock(&local->sta_mtx);
2085         }
2086
2087         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2088                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2089                                         false);
2090
2091         /*
2092          * If this is for hw restart things are still running.
2093          * We may want to change that later, however.
2094          */
2095         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2096                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2097
2098         if (!suspended)
2099                 return 0;
2100
2101 #ifdef CONFIG_PM
2102         /* first set suspended false, then resuming */
2103         local->suspended = false;
2104         mb();
2105         local->resuming = false;
2106
2107         ieee80211_flush_completed_scan(local, false);
2108
2109         if (local->open_count && !reconfig_due_to_wowlan)
2110                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2111
2112         list_for_each_entry(sdata, &local->interfaces, list) {
2113                 if (!ieee80211_sdata_running(sdata))
2114                         continue;
2115                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2116                         ieee80211_sta_restart(sdata);
2117         }
2118
2119         mod_timer(&local->sta_cleanup, jiffies + 1);
2120 #else
2121         WARN_ON(1);
2122 #endif
2123
2124         return 0;
2125 }
2126
2127 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2128 {
2129         struct ieee80211_sub_if_data *sdata;
2130         struct ieee80211_local *local;
2131         struct ieee80211_key *key;
2132
2133         if (WARN_ON(!vif))
2134                 return;
2135
2136         sdata = vif_to_sdata(vif);
2137         local = sdata->local;
2138
2139         if (WARN_ON(!local->resuming))
2140                 return;
2141
2142         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2143                 return;
2144
2145         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2146
2147         mutex_lock(&local->key_mtx);
2148         list_for_each_entry(key, &sdata->key_list, list)
2149                 key->flags |= KEY_FLAG_TAINTED;
2150         mutex_unlock(&local->key_mtx);
2151 }
2152 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2153
2154 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2155 {
2156         struct ieee80211_local *local = sdata->local;
2157         struct ieee80211_chanctx_conf *chanctx_conf;
2158         struct ieee80211_chanctx *chanctx;
2159
2160         mutex_lock(&local->chanctx_mtx);
2161
2162         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2163                                         lockdep_is_held(&local->chanctx_mtx));
2164
2165         /*
2166          * This function can be called from a work, thus it may be possible
2167          * that the chanctx_conf is removed (due to a disconnection, for
2168          * example).
2169          * So nothing should be done in such case.
2170          */
2171         if (!chanctx_conf)
2172                 goto unlock;
2173
2174         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175         ieee80211_recalc_smps_chanctx(local, chanctx);
2176  unlock:
2177         mutex_unlock(&local->chanctx_mtx);
2178 }
2179
2180 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2181 {
2182         struct ieee80211_local *local = sdata->local;
2183         struct ieee80211_chanctx_conf *chanctx_conf;
2184         struct ieee80211_chanctx *chanctx;
2185
2186         mutex_lock(&local->chanctx_mtx);
2187
2188         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2189                                         lockdep_is_held(&local->chanctx_mtx));
2190
2191         if (WARN_ON_ONCE(!chanctx_conf))
2192                 goto unlock;
2193
2194         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2195         ieee80211_recalc_chanctx_min_def(local, chanctx);
2196  unlock:
2197         mutex_unlock(&local->chanctx_mtx);
2198 }
2199
2200 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2201 {
2202         size_t pos = offset;
2203
2204         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2205                 pos += 2 + ies[pos + 1];
2206
2207         return pos;
2208 }
2209
2210 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2211                                             int rssi_min_thold,
2212                                             int rssi_max_thold)
2213 {
2214         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2215
2216         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2217                 return;
2218
2219         /*
2220          * Scale up threshold values before storing it, as the RSSI averaging
2221          * algorithm uses a scaled up value as well. Change this scaling
2222          * factor if the RSSI averaging algorithm changes.
2223          */
2224         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2225         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2226 }
2227
2228 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2229                                     int rssi_min_thold,
2230                                     int rssi_max_thold)
2231 {
2232         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233
2234         WARN_ON(rssi_min_thold == rssi_max_thold ||
2235                 rssi_min_thold > rssi_max_thold);
2236
2237         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2238                                        rssi_max_thold);
2239 }
2240 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2241
2242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2243 {
2244         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2245
2246         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2247 }
2248 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2249
2250 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2251                               u16 cap)
2252 {
2253         __le16 tmp;
2254
2255         *pos++ = WLAN_EID_HT_CAPABILITY;
2256         *pos++ = sizeof(struct ieee80211_ht_cap);
2257         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2258
2259         /* capability flags */
2260         tmp = cpu_to_le16(cap);
2261         memcpy(pos, &tmp, sizeof(u16));
2262         pos += sizeof(u16);
2263
2264         /* AMPDU parameters */
2265         *pos++ = ht_cap->ampdu_factor |
2266                  (ht_cap->ampdu_density <<
2267                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2268
2269         /* MCS set */
2270         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2271         pos += sizeof(ht_cap->mcs);
2272
2273         /* extended capabilities */
2274         pos += sizeof(__le16);
2275
2276         /* BF capabilities */
2277         pos += sizeof(__le32);
2278
2279         /* antenna selection */
2280         pos += sizeof(u8);
2281
2282         return pos;
2283 }
2284
2285 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2286                                u32 cap)
2287 {
2288         __le32 tmp;
2289
2290         *pos++ = WLAN_EID_VHT_CAPABILITY;
2291         *pos++ = sizeof(struct ieee80211_vht_cap);
2292         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2293
2294         /* capability flags */
2295         tmp = cpu_to_le32(cap);
2296         memcpy(pos, &tmp, sizeof(u32));
2297         pos += sizeof(u32);
2298
2299         /* VHT MCS set */
2300         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2301         pos += sizeof(vht_cap->vht_mcs);
2302
2303         return pos;
2304 }
2305
2306 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2307                                const struct cfg80211_chan_def *chandef,
2308                                u16 prot_mode, bool rifs_mode)
2309 {
2310         struct ieee80211_ht_operation *ht_oper;
2311         /* Build HT Information */
2312         *pos++ = WLAN_EID_HT_OPERATION;
2313         *pos++ = sizeof(struct ieee80211_ht_operation);
2314         ht_oper = (struct ieee80211_ht_operation *)pos;
2315         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2316                                         chandef->chan->center_freq);
2317         switch (chandef->width) {
2318         case NL80211_CHAN_WIDTH_160:
2319         case NL80211_CHAN_WIDTH_80P80:
2320         case NL80211_CHAN_WIDTH_80:
2321         case NL80211_CHAN_WIDTH_40:
2322                 if (chandef->center_freq1 > chandef->chan->center_freq)
2323                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2324                 else
2325                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2326                 break;
2327         default:
2328                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2329                 break;
2330         }
2331         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2332             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2333             chandef->width != NL80211_CHAN_WIDTH_20)
2334                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2335
2336         if (rifs_mode)
2337                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2338
2339         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2340         ht_oper->stbc_param = 0x0000;
2341
2342         /* It seems that Basic MCS set and Supported MCS set
2343            are identical for the first 10 bytes */
2344         memset(&ht_oper->basic_set, 0, 16);
2345         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2346
2347         return pos + sizeof(struct ieee80211_ht_operation);
2348 }
2349
2350 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2351                                 const struct cfg80211_chan_def *chandef)
2352 {
2353         struct ieee80211_vht_operation *vht_oper;
2354
2355         *pos++ = WLAN_EID_VHT_OPERATION;
2356         *pos++ = sizeof(struct ieee80211_vht_operation);
2357         vht_oper = (struct ieee80211_vht_operation *)pos;
2358         vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2359                                                         chandef->center_freq1);
2360         if (chandef->center_freq2)
2361                 vht_oper->center_freq_seg2_idx =
2362                         ieee80211_frequency_to_channel(chandef->center_freq2);
2363         else
2364                 vht_oper->center_freq_seg2_idx = 0x00;
2365
2366         switch (chandef->width) {
2367         case NL80211_CHAN_WIDTH_160:
2368                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2369                 break;
2370         case NL80211_CHAN_WIDTH_80P80:
2371                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2372                 break;
2373         case NL80211_CHAN_WIDTH_80:
2374                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2375                 break;
2376         default:
2377                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2378                 break;
2379         }
2380
2381         /* don't require special VHT peer rates */
2382         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2383
2384         return pos + sizeof(struct ieee80211_vht_operation);
2385 }
2386
2387 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2388                                   const struct ieee80211_ht_operation *ht_oper,
2389                                   struct cfg80211_chan_def *chandef)
2390 {
2391         enum nl80211_channel_type channel_type;
2392
2393         if (!ht_oper) {
2394                 cfg80211_chandef_create(chandef, control_chan,
2395                                         NL80211_CHAN_NO_HT);
2396                 return;
2397         }
2398
2399         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2400         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2401                 channel_type = NL80211_CHAN_HT20;
2402                 break;
2403         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2404                 channel_type = NL80211_CHAN_HT40PLUS;
2405                 break;
2406         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2407                 channel_type = NL80211_CHAN_HT40MINUS;
2408                 break;
2409         default:
2410                 channel_type = NL80211_CHAN_NO_HT;
2411         }
2412
2413         cfg80211_chandef_create(chandef, control_chan, channel_type);
2414 }
2415
2416 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2417                                    const struct ieee80211_vht_operation *oper,
2418                                    struct cfg80211_chan_def *chandef)
2419 {
2420         if (!oper)
2421                 return;
2422
2423         chandef->chan = control_chan;
2424
2425         switch (oper->chan_width) {
2426         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2427                 break;
2428         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2429                 chandef->width = NL80211_CHAN_WIDTH_80;
2430                 break;
2431         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2432                 chandef->width = NL80211_CHAN_WIDTH_160;
2433                 break;
2434         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2435                 chandef->width = NL80211_CHAN_WIDTH_80P80;
2436                 break;
2437         default:
2438                 break;
2439         }
2440
2441         chandef->center_freq1 =
2442                 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2443                                                control_chan->band);
2444         chandef->center_freq2 =
2445                 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2446                                                control_chan->band);
2447 }
2448
2449 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2450                              const struct ieee80211_supported_band *sband,
2451                              const u8 *srates, int srates_len, u32 *rates)
2452 {
2453         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2454         int shift = ieee80211_chandef_get_shift(chandef);
2455         struct ieee80211_rate *br;
2456         int brate, rate, i, j, count = 0;
2457
2458         *rates = 0;
2459
2460         for (i = 0; i < srates_len; i++) {
2461                 rate = srates[i] & 0x7f;
2462
2463                 for (j = 0; j < sband->n_bitrates; j++) {
2464                         br = &sband->bitrates[j];
2465                         if ((rate_flags & br->flags) != rate_flags)
2466                                 continue;
2467
2468                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2469                         if (brate == rate) {
2470                                 *rates |= BIT(j);
2471                                 count++;
2472                                 break;
2473                         }
2474                 }
2475         }
2476         return count;
2477 }
2478
2479 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2480                             struct sk_buff *skb, bool need_basic,
2481                             enum ieee80211_band band)
2482 {
2483         struct ieee80211_local *local = sdata->local;
2484         struct ieee80211_supported_band *sband;
2485         int rate, shift;
2486         u8 i, rates, *pos;
2487         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2488         u32 rate_flags;
2489
2490         shift = ieee80211_vif_get_shift(&sdata->vif);
2491         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2492         sband = local->hw.wiphy->bands[band];
2493         rates = 0;
2494         for (i = 0; i < sband->n_bitrates; i++) {
2495                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2496                         continue;
2497                 rates++;
2498         }
2499         if (rates > 8)
2500                 rates = 8;
2501
2502         if (skb_tailroom(skb) < rates + 2)
2503                 return -ENOMEM;
2504
2505         pos = skb_put(skb, rates + 2);
2506         *pos++ = WLAN_EID_SUPP_RATES;
2507         *pos++ = rates;
2508         for (i = 0; i < rates; i++) {
2509                 u8 basic = 0;
2510                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2511                         continue;
2512
2513                 if (need_basic && basic_rates & BIT(i))
2514                         basic = 0x80;
2515                 rate = sband->bitrates[i].bitrate;
2516                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2517                                     5 * (1 << shift));
2518                 *pos++ = basic | (u8) rate;
2519         }
2520
2521         return 0;
2522 }
2523
2524 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2525                                 struct sk_buff *skb, bool need_basic,
2526                                 enum ieee80211_band band)
2527 {
2528         struct ieee80211_local *local = sdata->local;
2529         struct ieee80211_supported_band *sband;
2530         int rate, shift;
2531         u8 i, exrates, *pos;
2532         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2533         u32 rate_flags;
2534
2535         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2536         shift = ieee80211_vif_get_shift(&sdata->vif);
2537
2538         sband = local->hw.wiphy->bands[band];
2539         exrates = 0;
2540         for (i = 0; i < sband->n_bitrates; i++) {
2541                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2542                         continue;
2543                 exrates++;
2544         }
2545
2546         if (exrates > 8)
2547                 exrates -= 8;
2548         else
2549                 exrates = 0;
2550
2551         if (skb_tailroom(skb) < exrates + 2)
2552                 return -ENOMEM;
2553
2554         if (exrates) {
2555                 pos = skb_put(skb, exrates + 2);
2556                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2557                 *pos++ = exrates;
2558                 for (i = 8; i < sband->n_bitrates; i++) {
2559                         u8 basic = 0;
2560                         if ((rate_flags & sband->bitrates[i].flags)
2561                             != rate_flags)
2562                                 continue;
2563                         if (need_basic && basic_rates & BIT(i))
2564                                 basic = 0x80;
2565                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2566                                             5 * (1 << shift));
2567                         *pos++ = basic | (u8) rate;
2568                 }
2569         }
2570         return 0;
2571 }
2572
2573 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2574 {
2575         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2576         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2577
2578         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2579                 /* non-managed type inferfaces */
2580                 return 0;
2581         }
2582         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2583 }
2584 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2585
2586 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2587 {
2588         if (!mcs)
2589                 return 1;
2590
2591         /* TODO: consider rx_highest */
2592
2593         if (mcs->rx_mask[3])
2594                 return 4;
2595         if (mcs->rx_mask[2])
2596                 return 3;
2597         if (mcs->rx_mask[1])
2598                 return 2;
2599         return 1;
2600 }
2601
2602 /**
2603  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2604  * @local: mac80211 hw info struct
2605  * @status: RX status
2606  * @mpdu_len: total MPDU length (including FCS)
2607  * @mpdu_offset: offset into MPDU to calculate timestamp at
2608  *
2609  * This function calculates the RX timestamp at the given MPDU offset, taking
2610  * into account what the RX timestamp was. An offset of 0 will just normalize
2611  * the timestamp to TSF at beginning of MPDU reception.
2612  */
2613 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2614                                      struct ieee80211_rx_status *status,
2615                                      unsigned int mpdu_len,
2616                                      unsigned int mpdu_offset)
2617 {
2618         u64 ts = status->mactime;
2619         struct rate_info ri;
2620         u16 rate;
2621
2622         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2623                 return 0;
2624
2625         memset(&ri, 0, sizeof(ri));
2626
2627         /* Fill cfg80211 rate info */
2628         if (status->flag & RX_FLAG_HT) {
2629                 ri.mcs = status->rate_idx;
2630                 ri.flags |= RATE_INFO_FLAGS_MCS;
2631                 if (status->flag & RX_FLAG_40MHZ)
2632                         ri.bw = RATE_INFO_BW_40;
2633                 else
2634                         ri.bw = RATE_INFO_BW_20;
2635                 if (status->flag & RX_FLAG_SHORT_GI)
2636                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2637         } else if (status->flag & RX_FLAG_VHT) {
2638                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2639                 ri.mcs = status->rate_idx;
2640                 ri.nss = status->vht_nss;
2641                 if (status->flag & RX_FLAG_40MHZ)
2642                         ri.bw = RATE_INFO_BW_40;
2643                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2644                         ri.bw = RATE_INFO_BW_80;
2645                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2646                         ri.bw = RATE_INFO_BW_160;
2647                 else
2648                         ri.bw = RATE_INFO_BW_20;
2649                 if (status->flag & RX_FLAG_SHORT_GI)
2650                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2651         } else {
2652                 struct ieee80211_supported_band *sband;
2653                 int shift = 0;
2654                 int bitrate;
2655
2656                 if (status->flag & RX_FLAG_10MHZ) {
2657                         shift = 1;
2658                         ri.bw = RATE_INFO_BW_10;
2659                 } else if (status->flag & RX_FLAG_5MHZ) {
2660                         shift = 2;
2661                         ri.bw = RATE_INFO_BW_5;
2662                 } else {
2663                         ri.bw = RATE_INFO_BW_20;
2664                 }
2665
2666                 sband = local->hw.wiphy->bands[status->band];
2667                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2668                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2669         }
2670
2671         rate = cfg80211_calculate_bitrate(&ri);
2672         if (WARN_ONCE(!rate,
2673                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2674                       (unsigned long long)status->flag, status->rate_idx,
2675                       status->vht_nss))
2676                 return 0;
2677
2678         /* rewind from end of MPDU */
2679         if (status->flag & RX_FLAG_MACTIME_END)
2680                 ts -= mpdu_len * 8 * 10 / rate;
2681
2682         ts += mpdu_offset * 8 * 10 / rate;
2683
2684         return ts;
2685 }
2686
2687 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2688 {
2689         struct ieee80211_sub_if_data *sdata;
2690         struct cfg80211_chan_def chandef;
2691
2692         mutex_lock(&local->mtx);
2693         mutex_lock(&local->iflist_mtx);
2694         list_for_each_entry(sdata, &local->interfaces, list) {
2695                 /* it might be waiting for the local->mtx, but then
2696                  * by the time it gets it, sdata->wdev.cac_started
2697                  * will no longer be true
2698                  */
2699                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2700
2701                 if (sdata->wdev.cac_started) {
2702                         chandef = sdata->vif.bss_conf.chandef;
2703                         ieee80211_vif_release_channel(sdata);
2704                         cfg80211_cac_event(sdata->dev,
2705                                            &chandef,
2706                                            NL80211_RADAR_CAC_ABORTED,
2707                                            GFP_KERNEL);
2708                 }
2709         }
2710         mutex_unlock(&local->iflist_mtx);
2711         mutex_unlock(&local->mtx);
2712 }
2713
2714 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2715 {
2716         struct ieee80211_local *local =
2717                 container_of(work, struct ieee80211_local, radar_detected_work);
2718         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2719         struct ieee80211_chanctx *ctx;
2720         int num_chanctx = 0;
2721
2722         mutex_lock(&local->chanctx_mtx);
2723         list_for_each_entry(ctx, &local->chanctx_list, list) {
2724                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2725                         continue;
2726
2727                 num_chanctx++;
2728                 chandef = ctx->conf.def;
2729         }
2730         mutex_unlock(&local->chanctx_mtx);
2731
2732         ieee80211_dfs_cac_cancel(local);
2733
2734         if (num_chanctx > 1)
2735                 /* XXX: multi-channel is not supported yet */
2736                 WARN_ON(1);
2737         else
2738                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2739 }
2740
2741 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2742 {
2743         struct ieee80211_local *local = hw_to_local(hw);
2744
2745         trace_api_radar_detected(local);
2746
2747         ieee80211_queue_work(hw, &local->radar_detected_work);
2748 }
2749 EXPORT_SYMBOL(ieee80211_radar_detected);
2750
2751 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2752 {
2753         u32 ret;
2754         int tmp;
2755
2756         switch (c->width) {
2757         case NL80211_CHAN_WIDTH_20:
2758                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2759                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2760                 break;
2761         case NL80211_CHAN_WIDTH_40:
2762                 c->width = NL80211_CHAN_WIDTH_20;
2763                 c->center_freq1 = c->chan->center_freq;
2764                 ret = IEEE80211_STA_DISABLE_40MHZ |
2765                       IEEE80211_STA_DISABLE_VHT;
2766                 break;
2767         case NL80211_CHAN_WIDTH_80:
2768                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2769                 /* n_P40 */
2770                 tmp /= 2;
2771                 /* freq_P40 */
2772                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2773                 c->width = NL80211_CHAN_WIDTH_40;
2774                 ret = IEEE80211_STA_DISABLE_VHT;
2775                 break;
2776         case NL80211_CHAN_WIDTH_80P80:
2777                 c->center_freq2 = 0;
2778                 c->width = NL80211_CHAN_WIDTH_80;
2779                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2780                       IEEE80211_STA_DISABLE_160MHZ;
2781                 break;
2782         case NL80211_CHAN_WIDTH_160:
2783                 /* n_P20 */
2784                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2785                 /* n_P80 */
2786                 tmp /= 4;
2787                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2788                 c->width = NL80211_CHAN_WIDTH_80;
2789                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2790                       IEEE80211_STA_DISABLE_160MHZ;
2791                 break;
2792         default:
2793         case NL80211_CHAN_WIDTH_20_NOHT:
2794                 WARN_ON_ONCE(1);
2795                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2796                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2797                 break;
2798         case NL80211_CHAN_WIDTH_5:
2799         case NL80211_CHAN_WIDTH_10:
2800                 WARN_ON_ONCE(1);
2801                 /* keep c->width */
2802                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2803                 break;
2804         }
2805
2806         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2807
2808         return ret;
2809 }
2810
2811 /*
2812  * Returns true if smps_mode_new is strictly more restrictive than
2813  * smps_mode_old.
2814  */
2815 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2816                                    enum ieee80211_smps_mode smps_mode_new)
2817 {
2818         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2819                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2820                 return false;
2821
2822         switch (smps_mode_old) {
2823         case IEEE80211_SMPS_STATIC:
2824                 return false;
2825         case IEEE80211_SMPS_DYNAMIC:
2826                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2827         case IEEE80211_SMPS_OFF:
2828                 return smps_mode_new != IEEE80211_SMPS_OFF;
2829         default:
2830                 WARN_ON(1);
2831         }
2832
2833         return false;
2834 }
2835
2836 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2837                               struct cfg80211_csa_settings *csa_settings)
2838 {
2839         struct sk_buff *skb;
2840         struct ieee80211_mgmt *mgmt;
2841         struct ieee80211_local *local = sdata->local;
2842         int freq;
2843         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2844                                sizeof(mgmt->u.action.u.chan_switch);
2845         u8 *pos;
2846
2847         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2848             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2849                 return -EOPNOTSUPP;
2850
2851         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2852                             5 + /* channel switch announcement element */
2853                             3 + /* secondary channel offset element */
2854                             8); /* mesh channel switch parameters element */
2855         if (!skb)
2856                 return -ENOMEM;
2857
2858         skb_reserve(skb, local->tx_headroom);
2859         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2860         memset(mgmt, 0, hdr_len);
2861         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2862                                           IEEE80211_STYPE_ACTION);
2863
2864         eth_broadcast_addr(mgmt->da);
2865         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2866         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2867                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2868         } else {
2869                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2870                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2871         }
2872         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2873         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2874         pos = skb_put(skb, 5);
2875         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2876         *pos++ = 3;                                             /* IE length */
2877         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2878         freq = csa_settings->chandef.chan->center_freq;
2879         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2880         *pos++ = csa_settings->count;                           /* count */
2881
2882         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2883                 enum nl80211_channel_type ch_type;
2884
2885                 skb_put(skb, 3);
2886                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2887                 *pos++ = 1;                                     /* IE length */
2888                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2889                 if (ch_type == NL80211_CHAN_HT40PLUS)
2890                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2891                 else
2892                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2893         }
2894
2895         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2896                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2897
2898                 skb_put(skb, 8);
2899                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2900                 *pos++ = 6;                                     /* IE length */
2901                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2902                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2903                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2904                 *pos++ |= csa_settings->block_tx ?
2905                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2906                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2907                 pos += 2;
2908                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2909                 pos += 2;
2910         }
2911
2912         ieee80211_tx_skb(sdata, skb);
2913         return 0;
2914 }
2915
2916 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2917 {
2918         return !(cs == NULL || cs->cipher == 0 ||
2919                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2920                  cs->hdr_len <= cs->key_idx_off ||
2921                  cs->key_idx_shift > 7 ||
2922                  cs->key_idx_mask == 0);
2923 }
2924
2925 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2926 {
2927         int i;
2928
2929         /* Ensure we have enough iftype bitmap space for all iftype values */
2930         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2931
2932         for (i = 0; i < n; i++)
2933                 if (!ieee80211_cs_valid(&cs[i]))
2934                         return false;
2935
2936         return true;
2937 }
2938
2939 const struct ieee80211_cipher_scheme *
2940 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2941                  enum nl80211_iftype iftype)
2942 {
2943         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2944         int n = local->hw.n_cipher_schemes;
2945         int i;
2946         const struct ieee80211_cipher_scheme *cs = NULL;
2947
2948         for (i = 0; i < n; i++) {
2949                 if (l[i].cipher == cipher) {
2950                         cs = &l[i];
2951                         break;
2952                 }
2953         }
2954
2955         if (!cs || !(cs->iftype & BIT(iftype)))
2956                 return NULL;
2957
2958         return cs;
2959 }
2960
2961 int ieee80211_cs_headroom(struct ieee80211_local *local,
2962                           struct cfg80211_crypto_settings *crypto,
2963                           enum nl80211_iftype iftype)
2964 {
2965         const struct ieee80211_cipher_scheme *cs;
2966         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2967         int i;
2968
2969         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2970                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2971                                       iftype);
2972
2973                 if (cs && headroom < cs->hdr_len)
2974                         headroom = cs->hdr_len;
2975         }
2976
2977         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2978         if (cs && headroom < cs->hdr_len)
2979                 headroom = cs->hdr_len;
2980
2981         return headroom;
2982 }
2983
2984 static bool
2985 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2986 {
2987         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2988         int skip;
2989
2990         if (end > 0)
2991                 return false;
2992
2993         /* One shot NOA  */
2994         if (data->count[i] == 1)
2995                 return false;
2996
2997         if (data->desc[i].interval == 0)
2998                 return false;
2999
3000         /* End time is in the past, check for repetitions */
3001         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3002         if (data->count[i] < 255) {
3003                 if (data->count[i] <= skip) {
3004                         data->count[i] = 0;
3005                         return false;
3006                 }
3007
3008                 data->count[i] -= skip;
3009         }
3010
3011         data->desc[i].start += skip * data->desc[i].interval;
3012
3013         return true;
3014 }
3015
3016 static bool
3017 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3018                              s32 *offset)
3019 {
3020         bool ret = false;
3021         int i;
3022
3023         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3024                 s32 cur;
3025
3026                 if (!data->count[i])
3027                         continue;
3028
3029                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3030                         ret = true;
3031
3032                 cur = data->desc[i].start - tsf;
3033                 if (cur > *offset)
3034                         continue;
3035
3036                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3037                 if (cur > *offset)
3038                         *offset = cur;
3039         }
3040
3041         return ret;
3042 }
3043
3044 static u32
3045 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3046 {
3047         s32 offset = 0;
3048         int tries = 0;
3049         /*
3050          * arbitrary limit, used to avoid infinite loops when combined NoA
3051          * descriptors cover the full time period.
3052          */
3053         int max_tries = 5;
3054
3055         ieee80211_extend_absent_time(data, tsf, &offset);
3056         do {
3057                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3058                         break;
3059
3060                 tries++;
3061         } while (tries < max_tries);
3062
3063         return offset;
3064 }
3065
3066 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3067 {
3068         u32 next_offset = BIT(31) - 1;
3069         int i;
3070
3071         data->absent = 0;
3072         data->has_next_tsf = false;
3073         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3074                 s32 start;
3075
3076                 if (!data->count[i])
3077                         continue;
3078
3079                 ieee80211_extend_noa_desc(data, tsf, i);
3080                 start = data->desc[i].start - tsf;
3081                 if (start <= 0)
3082                         data->absent |= BIT(i);
3083
3084                 if (next_offset > start)
3085                         next_offset = start;
3086
3087                 data->has_next_tsf = true;
3088         }
3089
3090         if (data->absent)
3091                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3092
3093         data->next_tsf = tsf + next_offset;
3094 }
3095 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3096
3097 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3098                             struct ieee80211_noa_data *data, u32 tsf)
3099 {
3100         int ret = 0;
3101         int i;
3102
3103         memset(data, 0, sizeof(*data));
3104
3105         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3106                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3107
3108                 if (!desc->count || !desc->duration)
3109                         continue;
3110
3111                 data->count[i] = desc->count;
3112                 data->desc[i].start = le32_to_cpu(desc->start_time);
3113                 data->desc[i].duration = le32_to_cpu(desc->duration);
3114                 data->desc[i].interval = le32_to_cpu(desc->interval);
3115
3116                 if (data->count[i] > 1 &&
3117                     data->desc[i].interval < data->desc[i].duration)
3118                         continue;
3119
3120                 ieee80211_extend_noa_desc(data, tsf, i);
3121                 ret++;
3122         }
3123
3124         if (ret)
3125                 ieee80211_update_p2p_noa(data, tsf);
3126
3127         return ret;
3128 }
3129 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3130
3131 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3132                            struct ieee80211_sub_if_data *sdata)
3133 {
3134         u64 tsf = drv_get_tsf(local, sdata);
3135         u64 dtim_count = 0;
3136         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3137         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3138         struct ps_data *ps;
3139         u8 bcns_from_dtim;
3140
3141         if (tsf == -1ULL || !beacon_int || !dtim_period)
3142                 return;
3143
3144         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3145             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3146                 if (!sdata->bss)
3147                         return;
3148
3149                 ps = &sdata->bss->ps;
3150         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3151                 ps = &sdata->u.mesh.ps;
3152         } else {
3153                 return;
3154         }
3155
3156         /*
3157          * actually finds last dtim_count, mac80211 will update in
3158          * __beacon_add_tim().
3159          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3160          */
3161         do_div(tsf, beacon_int);
3162         bcns_from_dtim = do_div(tsf, dtim_period);
3163         /* just had a DTIM */
3164         if (!bcns_from_dtim)
3165                 dtim_count = 0;
3166         else
3167                 dtim_count = dtim_period - bcns_from_dtim;
3168
3169         ps->dtim_count = dtim_count;
3170 }
3171
3172 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3173                                          struct ieee80211_chanctx *ctx)
3174 {
3175         struct ieee80211_sub_if_data *sdata;
3176         u8 radar_detect = 0;
3177
3178         lockdep_assert_held(&local->chanctx_mtx);
3179
3180         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3181                 return 0;
3182
3183         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3184                 if (sdata->reserved_radar_required)
3185                         radar_detect |= BIT(sdata->reserved_chandef.width);
3186
3187         /*
3188          * An in-place reservation context should not have any assigned vifs
3189          * until it replaces the other context.
3190          */
3191         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3192                 !list_empty(&ctx->assigned_vifs));
3193
3194         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3195                 if (sdata->radar_required)
3196                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3197
3198         return radar_detect;
3199 }
3200
3201 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3202                                  const struct cfg80211_chan_def *chandef,
3203                                  enum ieee80211_chanctx_mode chanmode,
3204                                  u8 radar_detect)
3205 {
3206         struct ieee80211_local *local = sdata->local;
3207         struct ieee80211_sub_if_data *sdata_iter;
3208         enum nl80211_iftype iftype = sdata->wdev.iftype;
3209         int num[NUM_NL80211_IFTYPES];
3210         struct ieee80211_chanctx *ctx;
3211         int num_different_channels = 0;
3212         int total = 1;
3213
3214         lockdep_assert_held(&local->chanctx_mtx);
3215
3216         if (WARN_ON(hweight32(radar_detect) > 1))
3217                 return -EINVAL;
3218
3219         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3220                     !chandef->chan))
3221                 return -EINVAL;
3222
3223         if (chandef)
3224                 num_different_channels = 1;
3225
3226         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3227                 return -EINVAL;
3228
3229         /* Always allow software iftypes */
3230         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3231                 if (radar_detect)
3232                         return -EINVAL;
3233                 return 0;
3234         }
3235
3236         memset(num, 0, sizeof(num));
3237
3238         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3239                 num[iftype] = 1;
3240
3241         list_for_each_entry(ctx, &local->chanctx_list, list) {
3242                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3243                         continue;
3244                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3245                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3246                         num_different_channels++;
3247                         continue;
3248                 }
3249                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3250                     cfg80211_chandef_compatible(chandef,
3251                                                 &ctx->conf.def))
3252                         continue;
3253                 num_different_channels++;
3254         }
3255
3256         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3257                 struct wireless_dev *wdev_iter;
3258
3259                 wdev_iter = &sdata_iter->wdev;
3260
3261                 if (sdata_iter == sdata ||
3262                     !ieee80211_sdata_running(sdata_iter) ||
3263                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3264                         continue;
3265
3266                 num[wdev_iter->iftype]++;
3267                 total++;
3268         }
3269
3270         if (total == 1 && !radar_detect)
3271                 return 0;
3272
3273         return cfg80211_check_combinations(local->hw.wiphy,
3274                                            num_different_channels,
3275                                            radar_detect, num);
3276 }
3277
3278 static void
3279 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3280                          void *data)
3281 {
3282         u32 *max_num_different_channels = data;
3283
3284         *max_num_different_channels = max(*max_num_different_channels,
3285                                           c->num_different_channels);
3286 }
3287
3288 int ieee80211_max_num_channels(struct ieee80211_local *local)
3289 {
3290         struct ieee80211_sub_if_data *sdata;
3291         int num[NUM_NL80211_IFTYPES] = {};
3292         struct ieee80211_chanctx *ctx;
3293         int num_different_channels = 0;
3294         u8 radar_detect = 0;
3295         u32 max_num_different_channels = 1;
3296         int err;
3297
3298         lockdep_assert_held(&local->chanctx_mtx);
3299
3300         list_for_each_entry(ctx, &local->chanctx_list, list) {
3301                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3302                         continue;
3303
3304                 num_different_channels++;
3305
3306                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3307         }
3308
3309         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3310                 num[sdata->wdev.iftype]++;
3311
3312         err = cfg80211_iter_combinations(local->hw.wiphy,
3313                                          num_different_channels, radar_detect,
3314                                          num, ieee80211_iter_max_chans,
3315                                          &max_num_different_channels);
3316         if (err < 0)
3317                 return err;
3318
3319         return max_num_different_channels;
3320 }
3321
3322 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3323 {
3324         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3325         *buf++ = 7; /* len */
3326         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3327         *buf++ = 0x50;
3328         *buf++ = 0xf2;
3329         *buf++ = 2; /* WME */
3330         *buf++ = 0; /* WME info */
3331         *buf++ = 1; /* WME ver */
3332         *buf++ = qosinfo; /* U-APSD no in use */
3333
3334         return buf;
3335 }
3336
3337 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3338                              struct sta_info *sta,
3339                              struct txq_info *txqi, int tid)
3340 {
3341         skb_queue_head_init(&txqi->queue);
3342         txqi->txq.vif = &sdata->vif;
3343
3344         if (sta) {
3345                 txqi->txq.sta = &sta->sta;
3346                 sta->sta.txq[tid] = &txqi->txq;
3347                 txqi->txq.tid = tid;
3348                 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3349         } else {
3350                 sdata->vif.txq = &txqi->txq;
3351                 txqi->txq.tid = 0;
3352                 txqi->txq.ac = IEEE80211_AC_BE;
3353         }
3354 }