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