net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * utilities for mac80211
  14  */
  15
  16 #include <net/mac80211.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/export.h>
  19 #include <linux/types.h>
  20 #include <linux/slab.h>
  21 #include <linux/skbuff.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/if_arp.h>
  24 #include <linux/bitmap.h>
  25 #include <linux/crc32.h>
  26 #include <net/net_namespace.h>
  27 #include <net/cfg80211.h>
  28 #include <net/rtnetlink.h>
  29
  30 #include "ieee80211_i.h"
  31 #include "driver-ops.h"
  32 #include "rate.h"
  33 #include "mesh.h"
  34 #include "wme.h"
  35 #include "led.h"
  36 #include "wep.h"
  37
  38 /* privid for wiphys to determine whether they belong to us or not */
  39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  40
  41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  42 {
  43         struct ieee80211_local *local;
  44         BUG_ON(!wiphy);
  45
  46         local = wiphy_priv(wiphy);
  47         return &local->hw;
  48 }
  49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  50
  51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  52 {
  53         struct sk_buff *skb;
  54         struct ieee80211_hdr *hdr;
  55
  56         skb_queue_walk(&tx->skbs, skb) {
  57                 hdr = (struct ieee80211_hdr *) skb->data;
  58                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  59         }
  60 }
  61
  62 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  63                              int rate, int erp, int short_preamble,
  64                              int shift)
  65 {
  66         int dur;
  67
  68         /* calculate duration (in microseconds, rounded up to next higher
  69          * integer if it includes a fractional microsecond) to send frame of
  70          * len bytes (does not include FCS) at the given rate. Duration will
  71          * also include SIFS.
  72          *
  73          * rate is in 100 kbps, so divident is multiplied by 10 in the
  74          * DIV_ROUND_UP() operations.
  75          *
  76          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  77          * is assumed to be 0 otherwise.
  78          */
  79
  80         if (band == NL80211_BAND_5GHZ || erp) {
  81                 /*
  82                  * OFDM:
  83                  *
  84                  * N_DBPS = DATARATE x 4
  85                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  86                  *      (16 = SIGNAL time, 6 = tail bits)
  87                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  88                  *
  89                  * T_SYM = 4 usec
  90                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  91                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  92                  *      signal ext = 6 usec
  93                  */
  94                 dur = 16; /* SIFS + signal ext */
  95                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  96                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  97
  98                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  99                  *  * times 4 for 5 MHz
 100                  *  * times 2 for 10 MHz
 101                  */
 102                 dur *= 1 << shift;
 103
 104                 /* rates should already consider the channel bandwidth,
 105                  * don't apply divisor again.
 106                  */
 107                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 108                                         4 * rate); /* T_SYM x N_SYM */
 109         } else {
 110                 /*
 111                  * 802.11b or 802.11g with 802.11b compatibility:
 112                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 113                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 114                  *
 115                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 116                  * aSIFSTime = 10 usec
 117                  * aPreambleLength = 144 usec or 72 usec with short preamble
 118                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 119                  */
 120                 dur = 10; /* aSIFSTime = 10 usec */
 121                 dur += short_preamble ? (72 + 24) : (144 + 48);
 122
 123                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 124         }
 125
 126         return dur;
 127 }
 128
 129 /* Exported duration function for driver use */
 130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 131                                         struct ieee80211_vif *vif,
 132                                         enum nl80211_band band,
 133                                         size_t frame_len,
 134                                         struct ieee80211_rate *rate)
 135 {
 136         struct ieee80211_sub_if_data *sdata;
 137         u16 dur;
 138         int erp, shift = 0;
 139         bool short_preamble = false;
 140
 141         erp = 0;
 142         if (vif) {
 143                 sdata = vif_to_sdata(vif);
 144                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 145                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 146                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 147                 shift = ieee80211_vif_get_shift(vif);
 148         }
 149
 150         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 151                                        short_preamble, shift);
 152
 153         return cpu_to_le16(dur);
 154 }
 155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 156
 157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 158                               struct ieee80211_vif *vif, size_t frame_len,
 159                               const struct ieee80211_tx_info *frame_txctl)
 160 {
 161         struct ieee80211_local *local = hw_to_local(hw);
 162         struct ieee80211_rate *rate;
 163         struct ieee80211_sub_if_data *sdata;
 164         bool short_preamble;
 165         int erp, shift = 0, bitrate;
 166         u16 dur;
 167         struct ieee80211_supported_band *sband;
 168
 169         sband = local->hw.wiphy->bands[frame_txctl->band];
 170
 171         short_preamble = false;
 172
 173         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 174
 175         erp = 0;
 176         if (vif) {
 177                 sdata = vif_to_sdata(vif);
 178                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 179                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 180                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 181                 shift = ieee80211_vif_get_shift(vif);
 182         }
 183
 184         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 185
 186         /* CTS duration */
 187         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 188                                        erp, short_preamble, shift);
 189         /* Data frame duration */
 190         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 191                                         erp, short_preamble, shift);
 192         /* ACK duration */
 193         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 194                                         erp, short_preamble, shift);
 195
 196         return cpu_to_le16(dur);
 197 }
 198 EXPORT_SYMBOL(ieee80211_rts_duration);
 199
 200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 201                                     struct ieee80211_vif *vif,
 202                                     size_t frame_len,
 203                                     const struct ieee80211_tx_info *frame_txctl)
 204 {
 205         struct ieee80211_local *local = hw_to_local(hw);
 206         struct ieee80211_rate *rate;
 207         struct ieee80211_sub_if_data *sdata;
 208         bool short_preamble;
 209         int erp, shift = 0, bitrate;
 210         u16 dur;
 211         struct ieee80211_supported_band *sband;
 212
 213         sband = local->hw.wiphy->bands[frame_txctl->band];
 214
 215         short_preamble = false;
 216
 217         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 218         erp = 0;
 219         if (vif) {
 220                 sdata = vif_to_sdata(vif);
 221                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 222                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 223                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 224                 shift = ieee80211_vif_get_shift(vif);
 225         }
 226
 227         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 228
 229         /* Data frame duration */
 230         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 231                                        erp, short_preamble, shift);
 232         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 233                 /* ACK duration */
 234                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 235                                                 erp, short_preamble, shift);
 236         }
 237
 238         return cpu_to_le16(dur);
 239 }
 240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 241
 242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 243 {
 244         struct ieee80211_sub_if_data *sdata;
 245         int n_acs = IEEE80211_NUM_ACS;
 246
 247         if (local->ops->wake_tx_queue)
 248                 return;
 249
 250         if (local->hw.queues < IEEE80211_NUM_ACS)
 251                 n_acs = 1;
 252
 253         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 254                 int ac;
 255
 256                 if (!sdata->dev)
 257                         continue;
 258
 259                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 260                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 261                         continue;
 262
 263                 for (ac = 0; ac < n_acs; ac++) {
 264                         int ac_queue = sdata->vif.hw_queue[ac];
 265
 266                         if (ac_queue == queue ||
 267                             (sdata->vif.cab_queue == queue &&
 268                              local->queue_stop_reasons[ac_queue] == 0 &&
 269                              skb_queue_empty(&local->pending[ac_queue])))
 270                                 netif_wake_subqueue(sdata->dev, ac);
 271                 }
 272         }
 273 }
 274
 275 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 276                                    enum queue_stop_reason reason,
 277                                    bool refcounted)
 278 {
 279         struct ieee80211_local *local = hw_to_local(hw);
 280
 281         trace_wake_queue(local, queue, reason);
 282
 283         if (WARN_ON(queue >= hw->queues))
 284                 return;
 285
 286         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 287                 return;
 288
 289         if (!refcounted) {
 290                 local->q_stop_reasons[queue][reason] = 0;
 291         } else {
 292                 local->q_stop_reasons[queue][reason]--;
 293                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 294                         local->q_stop_reasons[queue][reason] = 0;
 295         }
 296
 297         if (local->q_stop_reasons[queue][reason] == 0)
 298                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 299
 300         if (local->queue_stop_reasons[queue] != 0)
 301                 /* someone still has this queue stopped */
 302                 return;
 303
 304         if (skb_queue_empty(&local->pending[queue])) {
 305                 rcu_read_lock();
 306                 ieee80211_propagate_queue_wake(local, queue);
 307                 rcu_read_unlock();
 308         } else
 309                 tasklet_schedule(&local->tx_pending_tasklet);
 310 }
 311
 312 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 313                                     enum queue_stop_reason reason,
 314                                     bool refcounted)
 315 {
 316         struct ieee80211_local *local = hw_to_local(hw);
 317         unsigned long flags;
 318
 319         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 320         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 321         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 322 }
 323
 324 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 325 {
 326         ieee80211_wake_queue_by_reason(hw, queue,
 327                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 328                                        false);
 329 }
 330 EXPORT_SYMBOL(ieee80211_wake_queue);
 331
 332 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 333                                    enum queue_stop_reason reason,
 334                                    bool refcounted)
 335 {
 336         struct ieee80211_local *local = hw_to_local(hw);
 337         struct ieee80211_sub_if_data *sdata;
 338         int n_acs = IEEE80211_NUM_ACS;
 339
 340         trace_stop_queue(local, queue, reason);
 341
 342         if (WARN_ON(queue >= hw->queues))
 343                 return;
 344
 345         if (!refcounted)
 346                 local->q_stop_reasons[queue][reason] = 1;
 347         else
 348                 local->q_stop_reasons[queue][reason]++;
 349
 350         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 351                 return;
 352
 353         if (local->ops->wake_tx_queue)
 354                 return;
 355
 356         if (local->hw.queues < IEEE80211_NUM_ACS)
 357                 n_acs = 1;
 358
 359         rcu_read_lock();
 360         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 361                 int ac;
 362
 363                 if (!sdata->dev)
 364                         continue;
 365
 366                 for (ac = 0; ac < n_acs; ac++) {
 367                         if (sdata->vif.hw_queue[ac] == queue ||
 368                             sdata->vif.cab_queue == queue)
 369                                 netif_stop_subqueue(sdata->dev, ac);
 370                 }
 371         }
 372         rcu_read_unlock();
 373 }
 374
 375 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 376                                     enum queue_stop_reason reason,
 377                                     bool refcounted)
 378 {
 379         struct ieee80211_local *local = hw_to_local(hw);
 380         unsigned long flags;
 381
 382         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 383         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 384         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 385 }
 386
 387 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 388 {
 389         ieee80211_stop_queue_by_reason(hw, queue,
 390                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 391                                        false);
 392 }
 393 EXPORT_SYMBOL(ieee80211_stop_queue);
 394
 395 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 396                                struct sk_buff *skb)
 397 {
 398         struct ieee80211_hw *hw = &local->hw;
 399         unsigned long flags;
 400         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 401         int queue = info->hw_queue;
 402
 403         if (WARN_ON(!info->control.vif)) {
 404                 ieee80211_free_txskb(&local->hw, skb);
 405                 return;
 406         }
 407
 408         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 409         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 410                                false);
 411         __skb_queue_tail(&local->pending[queue], skb);
 412         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 413                                false);
 414         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 415 }
 416
 417 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 418                                 struct sk_buff_head *skbs)
 419 {
 420         struct ieee80211_hw *hw = &local->hw;
 421         struct sk_buff *skb;
 422         unsigned long flags;
 423         int queue, i;
 424
 425         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 426         while ((skb = skb_dequeue(skbs))) {
 427                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 428
 429                 if (WARN_ON(!info->control.vif)) {
 430                         ieee80211_free_txskb(&local->hw, skb);
 431                         continue;
 432                 }
 433
 434                 queue = info->hw_queue;
 435
 436                 __ieee80211_stop_queue(hw, queue,
 437                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 438                                 false);
 439
 440                 __skb_queue_tail(&local->pending[queue], skb);
 441         }
 442
 443         for (i = 0; i < hw->queues; i++)
 444                 __ieee80211_wake_queue(hw, i,
 445                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 446                         false);
 447         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 448 }
 449
 450 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 451                                      unsigned long queues,
 452                                      enum queue_stop_reason reason,
 453                                      bool refcounted)
 454 {
 455         struct ieee80211_local *local = hw_to_local(hw);
 456         unsigned long flags;
 457         int i;
 458
 459         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 460
 461         for_each_set_bit(i, &queues, hw->queues)
 462                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 463
 464         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 465 }
 466
 467 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 468 {
 469         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 470                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 471                                         false);
 472 }
 473 EXPORT_SYMBOL(ieee80211_stop_queues);
 474
 475 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 476 {
 477         struct ieee80211_local *local = hw_to_local(hw);
 478         unsigned long flags;
 479         int ret;
 480
 481         if (WARN_ON(queue >= hw->queues))
 482                 return true;
 483
 484         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 485         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 486                        &local->queue_stop_reasons[queue]);
 487         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 488         return ret;
 489 }
 490 EXPORT_SYMBOL(ieee80211_queue_stopped);
 491
 492 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 493                                      unsigned long queues,
 494                                      enum queue_stop_reason reason,
 495                                      bool refcounted)
 496 {
 497         struct ieee80211_local *local = hw_to_local(hw);
 498         unsigned long flags;
 499         int i;
 500
 501         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 502
 503         for_each_set_bit(i, &queues, hw->queues)
 504                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 505
 506         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 507 }
 508
 509 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 510 {
 511         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 512                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 513                                         false);
 514 }
 515 EXPORT_SYMBOL(ieee80211_wake_queues);
 516
 517 static unsigned int
 518 ieee80211_get_vif_queues(struct ieee80211_local *local,
 519                          struct ieee80211_sub_if_data *sdata)
 520 {
 521         unsigned int queues;
 522
 523         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 524                 int ac;
 525
 526                 queues = 0;
 527
 528                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 529                         queues |= BIT(sdata->vif.hw_queue[ac]);
 530                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 531                         queues |= BIT(sdata->vif.cab_queue);
 532         } else {
 533                 /* all queues */
 534                 queues = BIT(local->hw.queues) - 1;
 535         }
 536
 537         return queues;
 538 }
 539
 540 void __ieee80211_flush_queues(struct ieee80211_local *local,
 541                               struct ieee80211_sub_if_data *sdata,
 542                               unsigned int queues, bool drop)
 543 {
 544         if (!local->ops->flush)
 545                 return;
 546
 547         /*
 548          * If no queue was set, or if the HW doesn't support
 549          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 550          */
 551         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 552                 queues = ieee80211_get_vif_queues(local, sdata);
 553
 554         ieee80211_stop_queues_by_reason(&local->hw, queues,
 555                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 556                                         false);
 557
 558         drv_flush(local, sdata, queues, drop);
 559
 560         ieee80211_wake_queues_by_reason(&local->hw, queues,
 561                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 562                                         false);
 563 }
 564
 565 void ieee80211_flush_queues(struct ieee80211_local *local,
 566                             struct ieee80211_sub_if_data *sdata, bool drop)
 567 {
 568         __ieee80211_flush_queues(local, sdata, 0, drop);
 569 }
 570
 571 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 572                                struct ieee80211_sub_if_data *sdata,
 573                                enum queue_stop_reason reason)
 574 {
 575         ieee80211_stop_queues_by_reason(&local->hw,
 576                                         ieee80211_get_vif_queues(local, sdata),
 577                                         reason, true);
 578 }
 579
 580 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 581                                struct ieee80211_sub_if_data *sdata,
 582                                enum queue_stop_reason reason)
 583 {
 584         ieee80211_wake_queues_by_reason(&local->hw,
 585                                         ieee80211_get_vif_queues(local, sdata),
 586                                         reason, true);
 587 }
 588
 589 static void __iterate_interfaces(struct ieee80211_local *local,
 590                                  u32 iter_flags,
 591                                  void (*iterator)(void *data, u8 *mac,
 592                                                   struct ieee80211_vif *vif),
 593                                  void *data)
 594 {
 595         struct ieee80211_sub_if_data *sdata;
 596         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 597
 598         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 599                 switch (sdata->vif.type) {
 600                 case NL80211_IFTYPE_MONITOR:
 601                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 602                                 continue;
 603                         break;
 604                 case NL80211_IFTYPE_AP_VLAN:
 605                         continue;
 606                 default:
 607                         break;
 608                 }
 609                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 610                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 611                         continue;
 612                 if (ieee80211_sdata_running(sdata) || !active_only)
 613                         iterator(data, sdata->vif.addr,
 614                                  &sdata->vif);
 615         }
 616
 617         sdata = rcu_dereference_check(local->monitor_sdata,
 618                                       lockdep_is_held(&local->iflist_mtx) ||
 619                                       lockdep_rtnl_is_held());
 620         if (sdata &&
 621             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 622              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 623                 iterator(data, sdata->vif.addr, &sdata->vif);
 624 }
 625
 626 void ieee80211_iterate_interfaces(
 627         struct ieee80211_hw *hw, u32 iter_flags,
 628         void (*iterator)(void *data, u8 *mac,
 629                          struct ieee80211_vif *vif),
 630         void *data)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633
 634         mutex_lock(&local->iflist_mtx);
 635         __iterate_interfaces(local, iter_flags, iterator, data);
 636         mutex_unlock(&local->iflist_mtx);
 637 }
 638 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 639
 640 void ieee80211_iterate_active_interfaces_atomic(
 641         struct ieee80211_hw *hw, u32 iter_flags,
 642         void (*iterator)(void *data, u8 *mac,
 643                          struct ieee80211_vif *vif),
 644         void *data)
 645 {
 646         struct ieee80211_local *local = hw_to_local(hw);
 647
 648         rcu_read_lock();
 649         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 650                              iterator, data);
 651         rcu_read_unlock();
 652 }
 653 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 654
 655 void ieee80211_iterate_active_interfaces_rtnl(
 656         struct ieee80211_hw *hw, u32 iter_flags,
 657         void (*iterator)(void *data, u8 *mac,
 658                          struct ieee80211_vif *vif),
 659         void *data)
 660 {
 661         struct ieee80211_local *local = hw_to_local(hw);
 662
 663         ASSERT_RTNL();
 664
 665         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 666                              iterator, data);
 667 }
 668 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 669
 670 static void __iterate_stations(struct ieee80211_local *local,
 671                                void (*iterator)(void *data,
 672                                                 struct ieee80211_sta *sta),
 673                                void *data)
 674 {
 675         struct sta_info *sta;
 676
 677         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 678                 if (!sta->uploaded)
 679                         continue;
 680
 681                 iterator(data, &sta->sta);
 682         }
 683 }
 684
 685 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 686                         void (*iterator)(void *data,
 687                                          struct ieee80211_sta *sta),
 688                         void *data)
 689 {
 690         struct ieee80211_local *local = hw_to_local(hw);
 691
 692         rcu_read_lock();
 693         __iterate_stations(local, iterator, data);
 694         rcu_read_unlock();
 695 }
 696 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 697
 698 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 699 {
 700         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 701
 702         if (!ieee80211_sdata_running(sdata) ||
 703             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 704                 return NULL;
 705         return &sdata->vif;
 706 }
 707 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 708
 709 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 710 {
 711         struct ieee80211_sub_if_data *sdata;
 712
 713         if (!vif)
 714                 return NULL;
 715
 716         sdata = vif_to_sdata(vif);
 717
 718         if (!ieee80211_sdata_running(sdata) ||
 719             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 720                 return NULL;
 721
 722         return &sdata->wdev;
 723 }
 724 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 725
 726 /*
 727  * Nothing should have been stuffed into the workqueue during
 728  * the suspend->resume cycle. Since we can't check each caller
 729  * of this function if we are already quiescing / suspended,
 730  * check here and don't WARN since this can actually happen when
 731  * the rx path (for example) is racing against __ieee80211_suspend
 732  * and suspending / quiescing was set after the rx path checked
 733  * them.
 734  */
 735 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 736 {
 737         if (local->quiescing || (local->suspended && !local->resuming)) {
 738                 pr_warn("queueing ieee80211 work while going to suspend\n");
 739                 return false;
 740         }
 741
 742         return true;
 743 }
 744
 745 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 746 {
 747         struct ieee80211_local *local = hw_to_local(hw);
 748
 749         if (!ieee80211_can_queue_work(local))
 750                 return;
 751
 752         queue_work(local->workqueue, work);
 753 }
 754 EXPORT_SYMBOL(ieee80211_queue_work);
 755
 756 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 757                                   struct delayed_work *dwork,
 758                                   unsigned long delay)
 759 {
 760         struct ieee80211_local *local = hw_to_local(hw);
 761
 762         if (!ieee80211_can_queue_work(local))
 763                 return;
 764
 765         queue_delayed_work(local->workqueue, dwork, delay);
 766 }
 767 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 768
 769 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 770                                struct ieee802_11_elems *elems,
 771                                u64 filter, u32 crc)
 772 {
 773         size_t left = len;
 774         const u8 *pos = start;
 775         bool calc_crc = filter != 0;
 776         DECLARE_BITMAP(seen_elems, 256);
 777         const u8 *ie;
 778
 779         bitmap_zero(seen_elems, 256);
 780         memset(elems, 0, sizeof(*elems));
 781         elems->ie_start = start;
 782         elems->total_len = len;
 783
 784         while (left >= 2) {
 785                 u8 id, elen;
 786                 bool elem_parse_failed;
 787
 788                 id = *pos++;
 789                 elen = *pos++;
 790                 left -= 2;
 791
 792                 if (elen > left) {
 793                         elems->parse_error = true;
 794                         break;
 795                 }
 796
 797                 switch (id) {
 798                 case WLAN_EID_SSID:
 799                 case WLAN_EID_SUPP_RATES:
 800                 case WLAN_EID_FH_PARAMS:
 801                 case WLAN_EID_DS_PARAMS:
 802                 case WLAN_EID_CF_PARAMS:
 803                 case WLAN_EID_TIM:
 804                 case WLAN_EID_IBSS_PARAMS:
 805                 case WLAN_EID_CHALLENGE:
 806                 case WLAN_EID_RSN:
 807                 case WLAN_EID_ERP_INFO:
 808                 case WLAN_EID_EXT_SUPP_RATES:
 809                 case WLAN_EID_HT_CAPABILITY:
 810                 case WLAN_EID_HT_OPERATION:
 811                 case WLAN_EID_VHT_CAPABILITY:
 812                 case WLAN_EID_VHT_OPERATION:
 813                 case WLAN_EID_MESH_ID:
 814                 case WLAN_EID_MESH_CONFIG:
 815                 case WLAN_EID_PEER_MGMT:
 816                 case WLAN_EID_PREQ:
 817                 case WLAN_EID_PREP:
 818                 case WLAN_EID_PERR:
 819                 case WLAN_EID_RANN:
 820                 case WLAN_EID_CHANNEL_SWITCH:
 821                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 822                 case WLAN_EID_COUNTRY:
 823                 case WLAN_EID_PWR_CONSTRAINT:
 824                 case WLAN_EID_TIMEOUT_INTERVAL:
 825                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 826                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 827                 case WLAN_EID_CHAN_SWITCH_PARAM:
 828                 case WLAN_EID_EXT_CAPABILITY:
 829                 case WLAN_EID_CHAN_SWITCH_TIMING:
 830                 case WLAN_EID_LINK_ID:
 831                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 832                 /*
 833                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 834                  * that if the content gets bigger it might be needed more than once
 835                  */
 836                         if (test_bit(id, seen_elems)) {
 837                                 elems->parse_error = true;
 838                                 left -= elen;
 839                                 pos += elen;
 840                                 continue;
 841                         }
 842                         break;
 843                 }
 844
 845                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 846                         crc = crc32_be(crc, pos - 2, elen + 2);
 847
 848                 elem_parse_failed = false;
 849
 850                 switch (id) {
 851                 case WLAN_EID_LINK_ID:
 852                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 853                                 elem_parse_failed = true;
 854                                 break;
 855                         }
 856                         elems->lnk_id = (void *)(pos - 2);
 857                         break;
 858                 case WLAN_EID_CHAN_SWITCH_TIMING:
 859                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 860                                 elem_parse_failed = true;
 861                                 break;
 862                         }
 863                         elems->ch_sw_timing = (void *)pos;
 864                         break;
 865                 case WLAN_EID_EXT_CAPABILITY:
 866                         elems->ext_capab = pos;
 867                         elems->ext_capab_len = elen;
 868                         break;
 869                 case WLAN_EID_SSID:
 870                         elems->ssid = pos;
 871                         elems->ssid_len = elen;
 872                         break;
 873                 case WLAN_EID_SUPP_RATES:
 874                         elems->supp_rates = pos;
 875                         elems->supp_rates_len = elen;
 876                         break;
 877                 case WLAN_EID_DS_PARAMS:
 878                         if (elen >= 1)
 879                                 elems->ds_params = pos;
 880                         else
 881                                 elem_parse_failed = true;
 882                         break;
 883                 case WLAN_EID_TIM:
 884                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 885                                 elems->tim = (void *)pos;
 886                                 elems->tim_len = elen;
 887                         } else
 888                                 elem_parse_failed = true;
 889                         break;
 890                 case WLAN_EID_CHALLENGE:
 891                         elems->challenge = pos;
 892                         elems->challenge_len = elen;
 893                         break;
 894                 case WLAN_EID_VENDOR_SPECIFIC:
 895                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 896                             pos[2] == 0xf2) {
 897                                 /* Microsoft OUI (00:50:F2) */
 898
 899                                 if (calc_crc)
 900                                         crc = crc32_be(crc, pos - 2, elen + 2);
 901
 902                                 if (elen >= 5 && pos[3] == 2) {
 903                                         /* OUI Type 2 - WMM IE */
 904                                         if (pos[4] == 0) {
 905                                                 elems->wmm_info = pos;
 906                                                 elems->wmm_info_len = elen;
 907                                         } else if (pos[4] == 1) {
 908                                                 elems->wmm_param = pos;
 909                                                 elems->wmm_param_len = elen;
 910                                         }
 911                                 }
 912                         }
 913                         break;
 914                 case WLAN_EID_RSN:
 915                         elems->rsn = pos;
 916                         elems->rsn_len = elen;
 917                         break;
 918                 case WLAN_EID_ERP_INFO:
 919                         if (elen >= 1)
 920                                 elems->erp_info = pos;
 921                         else
 922                                 elem_parse_failed = true;
 923                         break;
 924                 case WLAN_EID_EXT_SUPP_RATES:
 925                         elems->ext_supp_rates = pos;
 926                         elems->ext_supp_rates_len = elen;
 927                         break;
 928                 case WLAN_EID_HT_CAPABILITY:
 929                         if (elen >= sizeof(struct ieee80211_ht_cap))
 930                                 elems->ht_cap_elem = (void *)pos;
 931                         else
 932                                 elem_parse_failed = true;
 933                         break;
 934                 case WLAN_EID_HT_OPERATION:
 935                         if (elen >= sizeof(struct ieee80211_ht_operation))
 936                                 elems->ht_operation = (void *)pos;
 937                         else
 938                                 elem_parse_failed = true;
 939                         break;
 940                 case WLAN_EID_VHT_CAPABILITY:
 941                         if (elen >= sizeof(struct ieee80211_vht_cap))
 942                                 elems->vht_cap_elem = (void *)pos;
 943                         else
 944                                 elem_parse_failed = true;
 945                         break;
 946                 case WLAN_EID_VHT_OPERATION:
 947                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
 948                                 elems->vht_operation = (void *)pos;
 949                                 if (calc_crc)
 950                                         crc = crc32_be(crc, pos - 2, elen + 2);
 951                                 break;
 952                         }
 953                         elem_parse_failed = true;
 954                         break;
 955                 case WLAN_EID_OPMODE_NOTIF:
 956                         if (elen > 0) {
 957                                 elems->opmode_notif = pos;
 958                                 if (calc_crc)
 959                                         crc = crc32_be(crc, pos - 2, elen + 2);
 960                                 break;
 961                         }
 962                         elem_parse_failed = true;
 963                         break;
 964                 case WLAN_EID_MESH_ID:
 965                         elems->mesh_id = pos;
 966                         elems->mesh_id_len = elen;
 967                         break;
 968                 case WLAN_EID_MESH_CONFIG:
 969                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 970                                 elems->mesh_config = (void *)pos;
 971                         else
 972                                 elem_parse_failed = true;
 973                         break;
 974                 case WLAN_EID_PEER_MGMT:
 975                         elems->peering = pos;
 976                         elems->peering_len = elen;
 977                         break;
 978                 case WLAN_EID_MESH_AWAKE_WINDOW:
 979                         if (elen >= 2)
 980                                 elems->awake_window = (void *)pos;
 981                         break;
 982                 case WLAN_EID_PREQ:
 983                         elems->preq = pos;
 984                         elems->preq_len = elen;
 985                         break;
 986                 case WLAN_EID_PREP:
 987                         elems->prep = pos;
 988                         elems->prep_len = elen;
 989                         break;
 990                 case WLAN_EID_PERR:
 991                         elems->perr = pos;
 992                         elems->perr_len = elen;
 993                         break;
 994                 case WLAN_EID_RANN:
 995                         if (elen >= sizeof(struct ieee80211_rann_ie))
 996                                 elems->rann = (void *)pos;
 997                         else
 998                                 elem_parse_failed = true;
 999                         break;
1000                 case WLAN_EID_CHANNEL_SWITCH:
1001                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1002                                 elem_parse_failed = true;
1003                                 break;
1004                         }
1005                         elems->ch_switch_ie = (void *)pos;
1006                         break;
1007                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1008                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1009                                 elem_parse_failed = true;
1010                                 break;
1011                         }
1012                         elems->ext_chansw_ie = (void *)pos;
1013                         break;
1014                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1015                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1016                                 elem_parse_failed = true;
1017                                 break;
1018                         }
1019                         elems->sec_chan_offs = (void *)pos;
1020                         break;
1021                 case WLAN_EID_CHAN_SWITCH_PARAM:
1022                         if (elen !=
1023                             sizeof(*elems->mesh_chansw_params_ie)) {
1024                                 elem_parse_failed = true;
1025                                 break;
1026                         }
1027                         elems->mesh_chansw_params_ie = (void *)pos;
1028                         break;
1029                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1030                         if (!action ||
1031                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1032                                 elem_parse_failed = true;
1033                                 break;
1034                         }
1035                         elems->wide_bw_chansw_ie = (void *)pos;
1036                         break;
1037                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1038                         if (action) {
1039                                 elem_parse_failed = true;
1040                                 break;
1041                         }
1042                         /*
1043                          * This is a bit tricky, but as we only care about
1044                          * the wide bandwidth channel switch element, so
1045                          * just parse it out manually.
1046                          */
1047                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1048                                               pos, elen);
1049                         if (ie) {
1050                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1051                                         elems->wide_bw_chansw_ie =
1052                                                 (void *)(ie + 2);
1053                                 else
1054                                         elem_parse_failed = true;
1055                         }
1056                         break;
1057                 case WLAN_EID_COUNTRY:
1058                         elems->country_elem = pos;
1059                         elems->country_elem_len = elen;
1060                         break;
1061                 case WLAN_EID_PWR_CONSTRAINT:
1062                         if (elen != 1) {
1063                                 elem_parse_failed = true;
1064                                 break;
1065                         }
1066                         elems->pwr_constr_elem = pos;
1067                         break;
1068                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1069                         /* Lots of different options exist, but we only care
1070                          * about the Dynamic Transmit Power Control element.
1071                          * First check for the Cisco OUI, then for the DTPC
1072                          * tag (0x00).
1073                          */
1074                         if (elen < 4) {
1075                                 elem_parse_failed = true;
1076                                 break;
1077                         }
1078
1079                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1080                             pos[2] != 0x96 || pos[3] != 0x00)
1081                                 break;
1082
1083                         if (elen != 6) {
1084                                 elem_parse_failed = true;
1085                                 break;
1086                         }
1087
1088                         if (calc_crc)
1089                                 crc = crc32_be(crc, pos - 2, elen + 2);
1090
1091                         elems->cisco_dtpc_elem = pos;
1092                         break;
1093                 case WLAN_EID_TIMEOUT_INTERVAL:
1094                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1095                                 elems->timeout_int = (void *)pos;
1096                         else
1097                                 elem_parse_failed = true;
1098                         break;
1099                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1100                         if (elen >= sizeof(*elems->max_idle_period_ie))
1101                                 elems->max_idle_period_ie = (void *)pos;
1102                         break;
1103                 default:
1104                         break;
1105                 }
1106
1107                 if (elem_parse_failed)
1108                         elems->parse_error = true;
1109                 else
1110                         __set_bit(id, seen_elems);
1111
1112                 left -= elen;
1113                 pos += elen;
1114         }
1115
1116         if (left != 0)
1117                 elems->parse_error = true;
1118
1119         return crc;
1120 }
1121
1122 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1123                                bool bss_notify, bool enable_qos)
1124 {
1125         struct ieee80211_local *local = sdata->local;
1126         struct ieee80211_tx_queue_params qparam;
1127         struct ieee80211_chanctx_conf *chanctx_conf;
1128         int ac;
1129         bool use_11b;
1130         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1131         int aCWmin, aCWmax;
1132
1133         if (!local->ops->conf_tx)
1134                 return;
1135
1136         if (local->hw.queues < IEEE80211_NUM_ACS)
1137                 return;
1138
1139         memset(&qparam, 0, sizeof(qparam));
1140
1141         rcu_read_lock();
1142         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1143         use_11b = (chanctx_conf &&
1144                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1145                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1146         rcu_read_unlock();
1147
1148         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1149
1150         /* Set defaults according to 802.11-2007 Table 7-37 */
1151         aCWmax = 1023;
1152         if (use_11b)
1153                 aCWmin = 31;
1154         else
1155                 aCWmin = 15;
1156
1157         /* Confiure old 802.11b/g medium access rules. */
1158         qparam.cw_max = aCWmax;
1159         qparam.cw_min = aCWmin;
1160         qparam.txop = 0;
1161         qparam.aifs = 2;
1162
1163         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1164                 /* Update if QoS is enabled. */
1165                 if (enable_qos) {
1166                         switch (ac) {
1167                         case IEEE80211_AC_BK:
1168                                 qparam.cw_max = aCWmax;
1169                                 qparam.cw_min = aCWmin;
1170                                 qparam.txop = 0;
1171                                 if (is_ocb)
1172                                         qparam.aifs = 9;
1173                                 else
1174                                         qparam.aifs = 7;
1175                                 break;
1176                         /* never happens but let's not leave undefined */
1177                         default:
1178                         case IEEE80211_AC_BE:
1179                                 qparam.cw_max = aCWmax;
1180                                 qparam.cw_min = aCWmin;
1181                                 qparam.txop = 0;
1182                                 if (is_ocb)
1183                                         qparam.aifs = 6;
1184                                 else
1185                                         qparam.aifs = 3;
1186                                 break;
1187                         case IEEE80211_AC_VI:
1188                                 qparam.cw_max = aCWmin;
1189                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1190                                 if (is_ocb)
1191                                         qparam.txop = 0;
1192                                 else if (use_11b)
1193                                         qparam.txop = 6016/32;
1194                                 else
1195                                         qparam.txop = 3008/32;
1196
1197                                 if (is_ocb)
1198                                         qparam.aifs = 3;
1199                                 else
1200                                         qparam.aifs = 2;
1201                                 break;
1202                         case IEEE80211_AC_VO:
1203                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1204                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1205                                 if (is_ocb)
1206                                         qparam.txop = 0;
1207                                 else if (use_11b)
1208                                         qparam.txop = 3264/32;
1209                                 else
1210                                         qparam.txop = 1504/32;
1211                                 qparam.aifs = 2;
1212                                 break;
1213                         }
1214                 }
1215
1216                 qparam.uapsd = false;
1217
1218                 sdata->tx_conf[ac] = qparam;
1219                 drv_conf_tx(local, sdata, ac, &qparam);
1220         }
1221
1222         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1223             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1224             sdata->vif.type != NL80211_IFTYPE_NAN) {
1225                 sdata->vif.bss_conf.qos = enable_qos;
1226                 if (bss_notify)
1227                         ieee80211_bss_info_change_notify(sdata,
1228                                                          BSS_CHANGED_QOS);
1229         }
1230 }
1231
1232 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1233                          u16 transaction, u16 auth_alg, u16 status,
1234                          const u8 *extra, size_t extra_len, const u8 *da,
1235                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1236                          u32 tx_flags)
1237 {
1238         struct ieee80211_local *local = sdata->local;
1239         struct sk_buff *skb;
1240         struct ieee80211_mgmt *mgmt;
1241         int err;
1242
1243         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1244         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1245                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1246         if (!skb)
1247                 return;
1248
1249         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1250
1251         mgmt = skb_put_zero(skb, 24 + 6);
1252         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1253                                           IEEE80211_STYPE_AUTH);
1254         memcpy(mgmt->da, da, ETH_ALEN);
1255         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1256         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1257         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1258         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1259         mgmt->u.auth.status_code = cpu_to_le16(status);
1260         if (extra)
1261                 skb_put_data(skb, extra, extra_len);
1262
1263         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1264                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1265                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1266                 WARN_ON(err);
1267         }
1268
1269         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1270                                         tx_flags;
1271         ieee80211_tx_skb(sdata, skb);
1272 }
1273
1274 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1275                                     const u8 *bssid, u16 stype, u16 reason,
1276                                     bool send_frame, u8 *frame_buf)
1277 {
1278         struct ieee80211_local *local = sdata->local;
1279         struct sk_buff *skb;
1280         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1281
1282         /* build frame */
1283         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1284         mgmt->duration = 0; /* initialize only */
1285         mgmt->seq_ctrl = 0; /* initialize only */
1286         memcpy(mgmt->da, bssid, ETH_ALEN);
1287         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1288         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1289         /* u.deauth.reason_code == u.disassoc.reason_code */
1290         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1291
1292         if (send_frame) {
1293                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1294                                     IEEE80211_DEAUTH_FRAME_LEN);
1295                 if (!skb)
1296                         return;
1297
1298                 skb_reserve(skb, local->hw.extra_tx_headroom);
1299
1300                 /* copy in frame */
1301                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1302
1303                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1304                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1305                         IEEE80211_SKB_CB(skb)->flags |=
1306                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1307
1308                 ieee80211_tx_skb(sdata, skb);
1309         }
1310 }
1311
1312 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1313                                          u8 *buffer, size_t buffer_len,
1314                                          const u8 *ie, size_t ie_len,
1315                                          enum nl80211_band band,
1316                                          u32 rate_mask,
1317                                          struct cfg80211_chan_def *chandef,
1318                                          size_t *offset)
1319 {
1320         struct ieee80211_supported_band *sband;
1321         u8 *pos = buffer, *end = buffer + buffer_len;
1322         size_t noffset;
1323         int supp_rates_len, i;
1324         u8 rates[32];
1325         int num_rates;
1326         int ext_rates_len;
1327         int shift;
1328         u32 rate_flags;
1329         bool have_80mhz = false;
1330
1331         *offset = 0;
1332
1333         sband = local->hw.wiphy->bands[band];
1334         if (WARN_ON_ONCE(!sband))
1335                 return 0;
1336
1337         rate_flags = ieee80211_chandef_rate_flags(chandef);
1338         shift = ieee80211_chandef_get_shift(chandef);
1339
1340         num_rates = 0;
1341         for (i = 0; i < sband->n_bitrates; i++) {
1342                 if ((BIT(i) & rate_mask) == 0)
1343                         continue; /* skip rate */
1344                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1345                         continue;
1346
1347                 rates[num_rates++] =
1348                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1349                                           (1 << shift) * 5);
1350         }
1351
1352         supp_rates_len = min_t(int, num_rates, 8);
1353
1354         if (end - pos < 2 + supp_rates_len)
1355                 goto out_err;
1356         *pos++ = WLAN_EID_SUPP_RATES;
1357         *pos++ = supp_rates_len;
1358         memcpy(pos, rates, supp_rates_len);
1359         pos += supp_rates_len;
1360
1361         /* insert "request information" if in custom IEs */
1362         if (ie && ie_len) {
1363                 static const u8 before_extrates[] = {
1364                         WLAN_EID_SSID,
1365                         WLAN_EID_SUPP_RATES,
1366                         WLAN_EID_REQUEST,
1367                 };
1368                 noffset = ieee80211_ie_split(ie, ie_len,
1369                                              before_extrates,
1370                                              ARRAY_SIZE(before_extrates),
1371                                              *offset);
1372                 if (end - pos < noffset - *offset)
1373                         goto out_err;
1374                 memcpy(pos, ie + *offset, noffset - *offset);
1375                 pos += noffset - *offset;
1376                 *offset = noffset;
1377         }
1378
1379         ext_rates_len = num_rates - supp_rates_len;
1380         if (ext_rates_len > 0) {
1381                 if (end - pos < 2 + ext_rates_len)
1382                         goto out_err;
1383                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1384                 *pos++ = ext_rates_len;
1385                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1386                 pos += ext_rates_len;
1387         }
1388
1389         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1390                 if (end - pos < 3)
1391                         goto out_err;
1392                 *pos++ = WLAN_EID_DS_PARAMS;
1393                 *pos++ = 1;
1394                 *pos++ = ieee80211_frequency_to_channel(
1395                                 chandef->chan->center_freq);
1396         }
1397
1398         /* insert custom IEs that go before HT */
1399         if (ie && ie_len) {
1400                 static const u8 before_ht[] = {
1401                         WLAN_EID_SSID,
1402                         WLAN_EID_SUPP_RATES,
1403                         WLAN_EID_REQUEST,
1404                         WLAN_EID_EXT_SUPP_RATES,
1405                         WLAN_EID_DS_PARAMS,
1406                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1407                 };
1408                 noffset = ieee80211_ie_split(ie, ie_len,
1409                                              before_ht, ARRAY_SIZE(before_ht),
1410                                              *offset);
1411                 if (end - pos < noffset - *offset)
1412                         goto out_err;
1413                 memcpy(pos, ie + *offset, noffset - *offset);
1414                 pos += noffset - *offset;
1415                 *offset = noffset;
1416         }
1417
1418         if (sband->ht_cap.ht_supported) {
1419                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1420                         goto out_err;
1421                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1422                                                 sband->ht_cap.cap);
1423         }
1424
1425         /*
1426          * If adding more here, adjust code in main.c
1427          * that calculates local->scan_ies_len.
1428          */
1429
1430         /* insert custom IEs that go before VHT */
1431         if (ie && ie_len) {
1432                 static const u8 before_vht[] = {
1433                         WLAN_EID_SSID,
1434                         WLAN_EID_SUPP_RATES,
1435                         WLAN_EID_REQUEST,
1436                         WLAN_EID_EXT_SUPP_RATES,
1437                         WLAN_EID_DS_PARAMS,
1438                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1439                         WLAN_EID_HT_CAPABILITY,
1440                         WLAN_EID_BSS_COEX_2040,
1441                         WLAN_EID_EXT_CAPABILITY,
1442                         WLAN_EID_SSID_LIST,
1443                         WLAN_EID_CHANNEL_USAGE,
1444                         WLAN_EID_INTERWORKING,
1445                         WLAN_EID_MESH_ID,
1446                         /* 60 GHz can't happen here right now */
1447                 };
1448                 noffset = ieee80211_ie_split(ie, ie_len,
1449                                              before_vht, ARRAY_SIZE(before_vht),
1450                                              *offset);
1451                 if (end - pos < noffset - *offset)
1452                         goto out_err;
1453                 memcpy(pos, ie + *offset, noffset - *offset);
1454                 pos += noffset - *offset;
1455                 *offset = noffset;
1456         }
1457
1458         /* Check if any channel in this sband supports at least 80 MHz */
1459         for (i = 0; i < sband->n_channels; i++) {
1460                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1461                                                 IEEE80211_CHAN_NO_80MHZ))
1462                         continue;
1463
1464                 have_80mhz = true;
1465                 break;
1466         }
1467
1468         if (sband->vht_cap.vht_supported && have_80mhz) {
1469                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1470                         goto out_err;
1471                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1472                                                  sband->vht_cap.cap);
1473         }
1474
1475         return pos - buffer;
1476  out_err:
1477         WARN_ONCE(1, "not enough space for preq IEs\n");
1478         return pos - buffer;
1479 }
1480
1481 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1482                              size_t buffer_len,
1483                              struct ieee80211_scan_ies *ie_desc,
1484                              const u8 *ie, size_t ie_len,
1485                              u8 bands_used, u32 *rate_masks,
1486                              struct cfg80211_chan_def *chandef)
1487 {
1488         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1489         int i;
1490
1491         memset(ie_desc, 0, sizeof(*ie_desc));
1492
1493         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1494                 if (bands_used & BIT(i)) {
1495                         pos += ieee80211_build_preq_ies_band(local,
1496                                                              buffer + pos,
1497                                                              buffer_len - pos,
1498                                                              ie, ie_len, i,
1499                                                              rate_masks[i],
1500                                                              chandef,
1501                                                              &custom_ie_offset);
1502                         ie_desc->ies[i] = buffer + old_pos;
1503                         ie_desc->len[i] = pos - old_pos;
1504                         old_pos = pos;
1505                 }
1506         }
1507
1508         /* add any remaining custom IEs */
1509         if (ie && ie_len) {
1510                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1511                               "not enough space for preq custom IEs\n"))
1512                         return pos;
1513                 memcpy(buffer + pos, ie + custom_ie_offset,
1514                        ie_len - custom_ie_offset);
1515                 ie_desc->common_ies = buffer + pos;
1516                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1517                 pos += ie_len - custom_ie_offset;
1518         }
1519
1520         return pos;
1521 };
1522
1523 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1524                                           const u8 *src, const u8 *dst,
1525                                           u32 ratemask,
1526                                           struct ieee80211_channel *chan,
1527                                           const u8 *ssid, size_t ssid_len,
1528                                           const u8 *ie, size_t ie_len,
1529                                           bool directed)
1530 {
1531         struct ieee80211_local *local = sdata->local;
1532         struct cfg80211_chan_def chandef;
1533         struct sk_buff *skb;
1534         struct ieee80211_mgmt *mgmt;
1535         int ies_len;
1536         u32 rate_masks[NUM_NL80211_BANDS] = {};
1537         struct ieee80211_scan_ies dummy_ie_desc;
1538
1539         /*
1540          * Do not send DS Channel parameter for directed probe requests
1541          * in order to maximize the chance that we get a response.  Some
1542          * badly-behaved APs don't respond when this parameter is included.
1543          */
1544         chandef.width = sdata->vif.bss_conf.chandef.width;
1545         if (directed)
1546                 chandef.chan = NULL;
1547         else
1548                 chandef.chan = chan;
1549
1550         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1551                                      100 + ie_len);
1552         if (!skb)
1553                 return NULL;
1554
1555         rate_masks[chan->band] = ratemask;
1556         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1557                                            skb_tailroom(skb), &dummy_ie_desc,
1558                                            ie, ie_len, BIT(chan->band),
1559                                            rate_masks, &chandef);
1560         skb_put(skb, ies_len);
1561
1562         if (dst) {
1563                 mgmt = (struct ieee80211_mgmt *) skb->data;
1564                 memcpy(mgmt->da, dst, ETH_ALEN);
1565                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1566         }
1567
1568         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1569
1570         return skb;
1571 }
1572
1573 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1574                               const u8 *src, const u8 *dst,
1575                               const u8 *ssid, size_t ssid_len,
1576                               const u8 *ie, size_t ie_len,
1577                               u32 ratemask, bool directed, u32 tx_flags,
1578                               struct ieee80211_channel *channel, bool scan)
1579 {
1580         struct sk_buff *skb;
1581
1582         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1583                                         ssid, ssid_len,
1584                                         ie, ie_len, directed);
1585         if (skb) {
1586                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1587                 if (scan)
1588                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1589                 else
1590                         ieee80211_tx_skb(sdata, skb);
1591         }
1592 }
1593
1594 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1595                             struct ieee802_11_elems *elems,
1596                             enum nl80211_band band, u32 *basic_rates)
1597 {
1598         struct ieee80211_supported_band *sband;
1599         size_t num_rates;
1600         u32 supp_rates, rate_flags;
1601         int i, j, shift;
1602
1603         sband = sdata->local->hw.wiphy->bands[band];
1604         if (WARN_ON(!sband))
1605                 return 1;
1606
1607         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1608         shift = ieee80211_vif_get_shift(&sdata->vif);
1609
1610         num_rates = sband->n_bitrates;
1611         supp_rates = 0;
1612         for (i = 0; i < elems->supp_rates_len +
1613                      elems->ext_supp_rates_len; i++) {
1614                 u8 rate = 0;
1615                 int own_rate;
1616                 bool is_basic;
1617                 if (i < elems->supp_rates_len)
1618                         rate = elems->supp_rates[i];
1619                 else if (elems->ext_supp_rates)
1620                         rate = elems->ext_supp_rates
1621                                 [i - elems->supp_rates_len];
1622                 own_rate = 5 * (rate & 0x7f);
1623                 is_basic = !!(rate & 0x80);
1624
1625                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1626                         continue;
1627
1628                 for (j = 0; j < num_rates; j++) {
1629                         int brate;
1630                         if ((rate_flags & sband->bitrates[j].flags)
1631                             != rate_flags)
1632                                 continue;
1633
1634                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1635                                              1 << shift);
1636
1637                         if (brate == own_rate) {
1638                                 supp_rates |= BIT(j);
1639                                 if (basic_rates && is_basic)
1640                                         *basic_rates |= BIT(j);
1641                         }
1642                 }
1643         }
1644         return supp_rates;
1645 }
1646
1647 void ieee80211_stop_device(struct ieee80211_local *local)
1648 {
1649         ieee80211_led_radio(local, false);
1650         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1651
1652         cancel_work_sync(&local->reconfig_filter);
1653
1654         flush_workqueue(local->workqueue);
1655         drv_stop(local);
1656 }
1657
1658 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1659                                            bool aborted)
1660 {
1661         /* It's possible that we don't handle the scan completion in
1662          * time during suspend, so if it's still marked as completed
1663          * here, queue the work and flush it to clean things up.
1664          * Instead of calling the worker function directly here, we
1665          * really queue it to avoid potential races with other flows
1666          * scheduling the same work.
1667          */
1668         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1669                 /* If coming from reconfiguration failure, abort the scan so
1670                  * we don't attempt to continue a partial HW scan - which is
1671                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1672                  * completed scan, and a 5 GHz portion is still pending.
1673                  */
1674                 if (aborted)
1675                         set_bit(SCAN_ABORTED, &local->scanning);
1676                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1677                 flush_delayed_work(&local->scan_work);
1678         }
1679 }
1680
1681 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1682 {
1683         struct ieee80211_sub_if_data *sdata;
1684         struct ieee80211_chanctx *ctx;
1685
1686         /*
1687          * We get here if during resume the device can't be restarted properly.
1688          * We might also get here if this happens during HW reset, which is a
1689          * slightly different situation and we need to drop all connections in
1690          * the latter case.
1691          *
1692          * Ask cfg80211 to turn off all interfaces, this will result in more
1693          * warnings but at least we'll then get into a clean stopped state.
1694          */
1695
1696         local->resuming = false;
1697         local->suspended = false;
1698         local->in_reconfig = false;
1699
1700         ieee80211_flush_completed_scan(local, true);
1701
1702         /* scheduled scan clearly can't be running any more, but tell
1703          * cfg80211 and clear local state
1704          */
1705         ieee80211_sched_scan_end(local);
1706
1707         list_for_each_entry(sdata, &local->interfaces, list)
1708                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1709
1710         /* Mark channel contexts as not being in the driver any more to avoid
1711          * removing them from the driver during the shutdown process...
1712          */
1713         mutex_lock(&local->chanctx_mtx);
1714         list_for_each_entry(ctx, &local->chanctx_list, list)
1715                 ctx->driver_present = false;
1716         mutex_unlock(&local->chanctx_mtx);
1717
1718         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1719 }
1720
1721 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1722                                      struct ieee80211_sub_if_data *sdata)
1723 {
1724         struct ieee80211_chanctx_conf *conf;
1725         struct ieee80211_chanctx *ctx;
1726
1727         if (!local->use_chanctx)
1728                 return;
1729
1730         mutex_lock(&local->chanctx_mtx);
1731         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1732                                          lockdep_is_held(&local->chanctx_mtx));
1733         if (conf) {
1734                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1735                 drv_assign_vif_chanctx(local, sdata, ctx);
1736         }
1737         mutex_unlock(&local->chanctx_mtx);
1738 }
1739
1740 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1741 {
1742         struct ieee80211_local *local = sdata->local;
1743         struct sta_info *sta;
1744
1745         /* add STAs back */
1746         mutex_lock(&local->sta_mtx);
1747         list_for_each_entry(sta, &local->sta_list, list) {
1748                 enum ieee80211_sta_state state;
1749
1750                 if (!sta->uploaded || sta->sdata != sdata)
1751                         continue;
1752
1753                 for (state = IEEE80211_STA_NOTEXIST;
1754                      state < sta->sta_state; state++)
1755                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1756                                               state + 1));
1757         }
1758         mutex_unlock(&local->sta_mtx);
1759 }
1760
1761 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1762 {
1763         struct cfg80211_nan_func *func, **funcs;
1764         int res, id, i = 0;
1765
1766         res = drv_start_nan(sdata->local, sdata,
1767                             &sdata->u.nan.conf);
1768         if (WARN_ON(res))
1769                 return res;
1770
1771         funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1772                         sizeof(*funcs), GFP_KERNEL);
1773         if (!funcs)
1774                 return -ENOMEM;
1775
1776         /* Add all the functions:
1777          * This is a little bit ugly. We need to call a potentially sleeping
1778          * callback for each NAN function, so we can't hold the spinlock.
1779          */
1780         spin_lock_bh(&sdata->u.nan.func_lock);
1781
1782         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1783                 funcs[i++] = func;
1784
1785         spin_unlock_bh(&sdata->u.nan.func_lock);
1786
1787         for (i = 0; funcs[i]; i++) {
1788                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1789                 if (WARN_ON(res))
1790                         ieee80211_nan_func_terminated(&sdata->vif,
1791                                                       funcs[i]->instance_id,
1792                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1793                                                       GFP_KERNEL);
1794         }
1795
1796         kfree(funcs);
1797
1798         return 0;
1799 }
1800
1801 int ieee80211_reconfig(struct ieee80211_local *local)
1802 {
1803         struct ieee80211_hw *hw = &local->hw;
1804         struct ieee80211_sub_if_data *sdata;
1805         struct ieee80211_chanctx *ctx;
1806         struct sta_info *sta;
1807         int res, i;
1808         bool reconfig_due_to_wowlan = false;
1809         struct ieee80211_sub_if_data *sched_scan_sdata;
1810         struct cfg80211_sched_scan_request *sched_scan_req;
1811         bool sched_scan_stopped = false;
1812         bool suspended = local->suspended;
1813
1814         /* nothing to do if HW shouldn't run */
1815         if (!local->open_count)
1816                 goto wake_up;
1817
1818 #ifdef CONFIG_PM
1819         if (suspended)
1820                 local->resuming = true;
1821
1822         if (local->wowlan) {
1823                 /*
1824                  * In the wowlan case, both mac80211 and the device
1825                  * are functional when the resume op is called, so
1826                  * clear local->suspended so the device could operate
1827                  * normally (e.g. pass rx frames).
1828                  */
1829                 local->suspended = false;
1830                 res = drv_resume(local);
1831                 local->wowlan = false;
1832                 if (res < 0) {
1833                         local->resuming = false;
1834                         return res;
1835                 }
1836                 if (res == 0)
1837                         goto wake_up;
1838                 WARN_ON(res > 1);
1839                 /*
1840                  * res is 1, which means the driver requested
1841                  * to go through a regular reset on wakeup.
1842                  * restore local->suspended in this case.
1843                  */
1844                 reconfig_due_to_wowlan = true;
1845                 local->suspended = true;
1846         }
1847 #endif
1848
1849         /*
1850          * In case of hw_restart during suspend (without wowlan),
1851          * cancel restart work, as we are reconfiguring the device
1852          * anyway.
1853          * Note that restart_work is scheduled on a frozen workqueue,
1854          * so we can't deadlock in this case.
1855          */
1856         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1857                 cancel_work_sync(&local->restart_work);
1858
1859         local->started = false;
1860
1861         /*
1862          * Upon resume hardware can sometimes be goofy due to
1863          * various platform / driver / bus issues, so restarting
1864          * the device may at times not work immediately. Propagate
1865          * the error.
1866          */
1867         res = drv_start(local);
1868         if (res) {
1869                 if (suspended)
1870                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1871                 else
1872                         WARN(1, "Hardware became unavailable during restart.\n");
1873                 ieee80211_handle_reconfig_failure(local);
1874                 return res;
1875         }
1876
1877         /* setup fragmentation threshold */
1878         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1879
1880         /* setup RTS threshold */
1881         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1882
1883         /* reset coverage class */
1884         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1885
1886         ieee80211_led_radio(local, true);
1887         ieee80211_mod_tpt_led_trig(local,
1888                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1889
1890         /* add interfaces */
1891         sdata = rtnl_dereference(local->monitor_sdata);
1892         if (sdata) {
1893                 /* in HW restart it exists already */
1894                 WARN_ON(local->resuming);
1895                 res = drv_add_interface(local, sdata);
1896                 if (WARN_ON(res)) {
1897                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1898                         synchronize_net();
1899                         kfree(sdata);
1900                 }
1901         }
1902
1903         list_for_each_entry(sdata, &local->interfaces, list) {
1904                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1905                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1906                     ieee80211_sdata_running(sdata)) {
1907                         res = drv_add_interface(local, sdata);
1908                         if (WARN_ON(res))
1909                                 break;
1910                 }
1911         }
1912
1913         /* If adding any of the interfaces failed above, roll back and
1914          * report failure.
1915          */
1916         if (res) {
1917                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1918                                                      list)
1919                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1920                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1921                             ieee80211_sdata_running(sdata))
1922                                 drv_remove_interface(local, sdata);
1923                 ieee80211_handle_reconfig_failure(local);
1924                 return res;
1925         }
1926
1927         /* add channel contexts */
1928         if (local->use_chanctx) {
1929                 mutex_lock(&local->chanctx_mtx);
1930                 list_for_each_entry(ctx, &local->chanctx_list, list)
1931                         if (ctx->replace_state !=
1932                             IEEE80211_CHANCTX_REPLACES_OTHER)
1933                                 WARN_ON(drv_add_chanctx(local, ctx));
1934                 mutex_unlock(&local->chanctx_mtx);
1935
1936                 sdata = rtnl_dereference(local->monitor_sdata);
1937                 if (sdata && ieee80211_sdata_running(sdata))
1938                         ieee80211_assign_chanctx(local, sdata);
1939         }
1940
1941         /* reconfigure hardware */
1942         ieee80211_hw_config(local, ~0);
1943
1944         ieee80211_configure_filter(local);
1945
1946         /* Finally also reconfigure all the BSS information */
1947         list_for_each_entry(sdata, &local->interfaces, list) {
1948                 u32 changed;
1949
1950                 if (!ieee80211_sdata_running(sdata))
1951                         continue;
1952
1953                 ieee80211_assign_chanctx(local, sdata);
1954
1955                 switch (sdata->vif.type) {
1956                 case NL80211_IFTYPE_AP_VLAN:
1957                 case NL80211_IFTYPE_MONITOR:
1958                         break;
1959                 default:
1960                         ieee80211_reconfig_stations(sdata);
1961                         /* fall through */
1962                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1963                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1964                                 drv_conf_tx(local, sdata, i,
1965                                             &sdata->tx_conf[i]);
1966                         break;
1967                 }
1968
1969                 /* common change flags for all interface types */
1970                 changed = BSS_CHANGED_ERP_CTS_PROT |
1971                           BSS_CHANGED_ERP_PREAMBLE |
1972                           BSS_CHANGED_ERP_SLOT |
1973                           BSS_CHANGED_HT |
1974                           BSS_CHANGED_BASIC_RATES |
1975                           BSS_CHANGED_BEACON_INT |
1976                           BSS_CHANGED_BSSID |
1977                           BSS_CHANGED_CQM |
1978                           BSS_CHANGED_QOS |
1979                           BSS_CHANGED_IDLE |
1980                           BSS_CHANGED_TXPOWER;
1981
1982                 if (sdata->vif.mu_mimo_owner)
1983                         changed |= BSS_CHANGED_MU_GROUPS;
1984
1985                 switch (sdata->vif.type) {
1986                 case NL80211_IFTYPE_STATION:
1987                         changed |= BSS_CHANGED_ASSOC |
1988                                    BSS_CHANGED_ARP_FILTER |
1989                                    BSS_CHANGED_PS;
1990
1991                         /* Re-send beacon info report to the driver */
1992                         if (sdata->u.mgd.have_beacon)
1993                                 changed |= BSS_CHANGED_BEACON_INFO;
1994
1995                         if (sdata->vif.bss_conf.max_idle_period ||
1996                             sdata->vif.bss_conf.protected_keep_alive)
1997                                 changed |= BSS_CHANGED_KEEP_ALIVE;
1998
1999                         sdata_lock(sdata);
2000                         ieee80211_bss_info_change_notify(sdata, changed);
2001                         sdata_unlock(sdata);
2002                         break;
2003                 case NL80211_IFTYPE_OCB:
2004                         changed |= BSS_CHANGED_OCB;
2005                         ieee80211_bss_info_change_notify(sdata, changed);
2006                         break;
2007                 case NL80211_IFTYPE_ADHOC:
2008                         changed |= BSS_CHANGED_IBSS;
2009                         /* fall through */
2010                 case NL80211_IFTYPE_AP:
2011                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2012
2013                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2014                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2015
2016                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2017                                         drv_start_ap(local, sdata);
2018                         }
2019
2020                         /* fall through */
2021                 case NL80211_IFTYPE_MESH_POINT:
2022                         if (sdata->vif.bss_conf.enable_beacon) {
2023                                 changed |= BSS_CHANGED_BEACON |
2024                                            BSS_CHANGED_BEACON_ENABLED;
2025                                 ieee80211_bss_info_change_notify(sdata, changed);
2026                         }
2027                         break;
2028                 case NL80211_IFTYPE_NAN:
2029                         res = ieee80211_reconfig_nan(sdata);
2030                         if (res < 0) {
2031                                 ieee80211_handle_reconfig_failure(local);
2032                                 return res;
2033                         }
2034                         break;
2035                 case NL80211_IFTYPE_WDS:
2036                 case NL80211_IFTYPE_AP_VLAN:
2037                 case NL80211_IFTYPE_MONITOR:
2038                 case NL80211_IFTYPE_P2P_DEVICE:
2039                         /* nothing to do */
2040                         break;
2041                 case NL80211_IFTYPE_UNSPECIFIED:
2042                 case NUM_NL80211_IFTYPES:
2043                 case NL80211_IFTYPE_P2P_CLIENT:
2044                 case NL80211_IFTYPE_P2P_GO:
2045                         WARN_ON(1);
2046                         break;
2047                 }
2048         }
2049
2050         ieee80211_recalc_ps(local);
2051
2052         /*
2053          * The sta might be in psm against the ap (e.g. because
2054          * this was the state before a hw restart), so we
2055          * explicitly send a null packet in order to make sure
2056          * it'll sync against the ap (and get out of psm).
2057          */
2058         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2059                 list_for_each_entry(sdata, &local->interfaces, list) {
2060                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2061                                 continue;
2062                         if (!sdata->u.mgd.associated)
2063                                 continue;
2064
2065                         ieee80211_send_nullfunc(local, sdata, false);
2066                 }
2067         }
2068
2069         /* APs are now beaconing, add back stations */
2070         mutex_lock(&local->sta_mtx);
2071         list_for_each_entry(sta, &local->sta_list, list) {
2072                 enum ieee80211_sta_state state;
2073
2074                 if (!sta->uploaded)
2075                         continue;
2076
2077                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2078                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2079                         continue;
2080
2081                 for (state = IEEE80211_STA_NOTEXIST;
2082                      state < sta->sta_state; state++)
2083                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2084                                               state + 1));
2085         }
2086         mutex_unlock(&local->sta_mtx);
2087
2088         /* add back keys */
2089         list_for_each_entry(sdata, &local->interfaces, list)
2090                 ieee80211_reset_crypto_tx_tailroom(sdata);
2091
2092         list_for_each_entry(sdata, &local->interfaces, list)
2093                 if (ieee80211_sdata_running(sdata))
2094                         ieee80211_enable_keys(sdata);
2095
2096         /* Reconfigure sched scan if it was interrupted by FW restart */
2097         mutex_lock(&local->mtx);
2098         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2099                                                 lockdep_is_held(&local->mtx));
2100         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2101                                                 lockdep_is_held(&local->mtx));
2102         if (sched_scan_sdata && sched_scan_req)
2103                 /*
2104                  * Sched scan stopped, but we don't want to report it. Instead,
2105                  * we're trying to reschedule. However, if more than one scan
2106                  * plan was set, we cannot reschedule since we don't know which
2107                  * scan plan was currently running (and some scan plans may have
2108                  * already finished).
2109                  */
2110                 if (sched_scan_req->n_scan_plans > 1 ||
2111                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2112                                                          sched_scan_req)) {
2113                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2114                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2115                         sched_scan_stopped = true;
2116                 }
2117         mutex_unlock(&local->mtx);
2118
2119         if (sched_scan_stopped)
2120                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2121
2122  wake_up:
2123         if (local->in_reconfig) {
2124                 local->in_reconfig = false;
2125                 barrier();
2126
2127                 /* Restart deferred ROCs */
2128                 mutex_lock(&local->mtx);
2129                 ieee80211_start_next_roc(local);
2130                 mutex_unlock(&local->mtx);
2131         }
2132
2133         if (local->monitors == local->open_count && local->monitors > 0)
2134                 ieee80211_add_virtual_monitor(local);
2135
2136         /*
2137          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2138          * sessions can be established after a resume.
2139          *
2140          * Also tear down aggregation sessions since reconfiguring
2141          * them in a hardware restart scenario is not easily done
2142          * right now, and the hardware will have lost information
2143          * about the sessions, but we and the AP still think they
2144          * are active. This is really a workaround though.
2145          */
2146         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2147                 mutex_lock(&local->sta_mtx);
2148
2149                 list_for_each_entry(sta, &local->sta_list, list) {
2150                         if (!local->resuming)
2151                                 ieee80211_sta_tear_down_BA_sessions(
2152                                                 sta, AGG_STOP_LOCAL_REQUEST);
2153                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2154                 }
2155
2156                 mutex_unlock(&local->sta_mtx);
2157         }
2158
2159         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2160                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2161                                         false);
2162
2163         /*
2164          * If this is for hw restart things are still running.
2165          * We may want to change that later, however.
2166          */
2167         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2168                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2169
2170         if (!suspended)
2171                 return 0;
2172
2173 #ifdef CONFIG_PM
2174         /* first set suspended false, then resuming */
2175         local->suspended = false;
2176         mb();
2177         local->resuming = false;
2178
2179         ieee80211_flush_completed_scan(local, false);
2180
2181         if (local->open_count && !reconfig_due_to_wowlan)
2182                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2183
2184         list_for_each_entry(sdata, &local->interfaces, list) {
2185                 if (!ieee80211_sdata_running(sdata))
2186                         continue;
2187                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2188                         ieee80211_sta_restart(sdata);
2189         }
2190
2191         mod_timer(&local->sta_cleanup, jiffies + 1);
2192 #else
2193         WARN_ON(1);
2194 #endif
2195
2196         return 0;
2197 }
2198
2199 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2200 {
2201         struct ieee80211_sub_if_data *sdata;
2202         struct ieee80211_local *local;
2203         struct ieee80211_key *key;
2204
2205         if (WARN_ON(!vif))
2206                 return;
2207
2208         sdata = vif_to_sdata(vif);
2209         local = sdata->local;
2210
2211         if (WARN_ON(!local->resuming))
2212                 return;
2213
2214         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2215                 return;
2216
2217         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2218
2219         mutex_lock(&local->key_mtx);
2220         list_for_each_entry(key, &sdata->key_list, list)
2221                 key->flags |= KEY_FLAG_TAINTED;
2222         mutex_unlock(&local->key_mtx);
2223 }
2224 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2225
2226 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2227 {
2228         struct ieee80211_local *local = sdata->local;
2229         struct ieee80211_chanctx_conf *chanctx_conf;
2230         struct ieee80211_chanctx *chanctx;
2231
2232         mutex_lock(&local->chanctx_mtx);
2233
2234         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2235                                         lockdep_is_held(&local->chanctx_mtx));
2236
2237         /*
2238          * This function can be called from a work, thus it may be possible
2239          * that the chanctx_conf is removed (due to a disconnection, for
2240          * example).
2241          * So nothing should be done in such case.
2242          */
2243         if (!chanctx_conf)
2244                 goto unlock;
2245
2246         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2247         ieee80211_recalc_smps_chanctx(local, chanctx);
2248  unlock:
2249         mutex_unlock(&local->chanctx_mtx);
2250 }
2251
2252 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2253 {
2254         struct ieee80211_local *local = sdata->local;
2255         struct ieee80211_chanctx_conf *chanctx_conf;
2256         struct ieee80211_chanctx *chanctx;
2257
2258         mutex_lock(&local->chanctx_mtx);
2259
2260         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2261                                         lockdep_is_held(&local->chanctx_mtx));
2262
2263         if (WARN_ON_ONCE(!chanctx_conf))
2264                 goto unlock;
2265
2266         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2267         ieee80211_recalc_chanctx_min_def(local, chanctx);
2268  unlock:
2269         mutex_unlock(&local->chanctx_mtx);
2270 }
2271
2272 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2273 {
2274         size_t pos = offset;
2275
2276         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2277                 pos += 2 + ies[pos + 1];
2278
2279         return pos;
2280 }
2281
2282 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2283                                             int rssi_min_thold,
2284                                             int rssi_max_thold)
2285 {
2286         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2287
2288         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2289                 return;
2290
2291         /*
2292          * Scale up threshold values before storing it, as the RSSI averaging
2293          * algorithm uses a scaled up value as well. Change this scaling
2294          * factor if the RSSI averaging algorithm changes.
2295          */
2296         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2297         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2298 }
2299
2300 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2301                                     int rssi_min_thold,
2302                                     int rssi_max_thold)
2303 {
2304         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2305
2306         WARN_ON(rssi_min_thold == rssi_max_thold ||
2307                 rssi_min_thold > rssi_max_thold);
2308
2309         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2310                                        rssi_max_thold);
2311 }
2312 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2313
2314 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2315 {
2316         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2317
2318         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2319 }
2320 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2321
2322 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2323                               u16 cap)
2324 {
2325         __le16 tmp;
2326
2327         *pos++ = WLAN_EID_HT_CAPABILITY;
2328         *pos++ = sizeof(struct ieee80211_ht_cap);
2329         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2330
2331         /* capability flags */
2332         tmp = cpu_to_le16(cap);
2333         memcpy(pos, &tmp, sizeof(u16));
2334         pos += sizeof(u16);
2335
2336         /* AMPDU parameters */
2337         *pos++ = ht_cap->ampdu_factor |
2338                  (ht_cap->ampdu_density <<
2339                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2340
2341         /* MCS set */
2342         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2343         pos += sizeof(ht_cap->mcs);
2344
2345         /* extended capabilities */
2346         pos += sizeof(__le16);
2347
2348         /* BF capabilities */
2349         pos += sizeof(__le32);
2350
2351         /* antenna selection */
2352         pos += sizeof(u8);
2353
2354         return pos;
2355 }
2356
2357 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2358                                u32 cap)
2359 {
2360         __le32 tmp;
2361
2362         *pos++ = WLAN_EID_VHT_CAPABILITY;
2363         *pos++ = sizeof(struct ieee80211_vht_cap);
2364         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2365
2366         /* capability flags */
2367         tmp = cpu_to_le32(cap);
2368         memcpy(pos, &tmp, sizeof(u32));
2369         pos += sizeof(u32);
2370
2371         /* VHT MCS set */
2372         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2373         pos += sizeof(vht_cap->vht_mcs);
2374
2375         return pos;
2376 }
2377
2378 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2379                                const struct cfg80211_chan_def *chandef,
2380                                u16 prot_mode, bool rifs_mode)
2381 {
2382         struct ieee80211_ht_operation *ht_oper;
2383         /* Build HT Information */
2384         *pos++ = WLAN_EID_HT_OPERATION;
2385         *pos++ = sizeof(struct ieee80211_ht_operation);
2386         ht_oper = (struct ieee80211_ht_operation *)pos;
2387         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2388                                         chandef->chan->center_freq);
2389         switch (chandef->width) {
2390         case NL80211_CHAN_WIDTH_160:
2391         case NL80211_CHAN_WIDTH_80P80:
2392         case NL80211_CHAN_WIDTH_80:
2393         case NL80211_CHAN_WIDTH_40:
2394                 if (chandef->center_freq1 > chandef->chan->center_freq)
2395                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2396                 else
2397                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2398                 break;
2399         default:
2400                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2401                 break;
2402         }
2403         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2404             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2405             chandef->width != NL80211_CHAN_WIDTH_20)
2406                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2407
2408         if (rifs_mode)
2409                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2410
2411         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2412         ht_oper->stbc_param = 0x0000;
2413
2414         /* It seems that Basic MCS set and Supported MCS set
2415            are identical for the first 10 bytes */
2416         memset(&ht_oper->basic_set, 0, 16);
2417         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2418
2419         return pos + sizeof(struct ieee80211_ht_operation);
2420 }
2421
2422 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2423                                    const struct cfg80211_chan_def *chandef)
2424 {
2425         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2426         *pos++ = 3;                                     /* IE length */
2427         /* New channel width */
2428         switch (chandef->width) {
2429         case NL80211_CHAN_WIDTH_80:
2430                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2431                 break;
2432         case NL80211_CHAN_WIDTH_160:
2433                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2434                 break;
2435         case NL80211_CHAN_WIDTH_80P80:
2436                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2437                 break;
2438         default:
2439                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2440         }
2441
2442         /* new center frequency segment 0 */
2443         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2444         /* new center frequency segment 1 */
2445         if (chandef->center_freq2)
2446                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2447         else
2448                 *pos++ = 0;
2449 }
2450
2451 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2452                                 const struct cfg80211_chan_def *chandef)
2453 {
2454         struct ieee80211_vht_operation *vht_oper;
2455
2456         *pos++ = WLAN_EID_VHT_OPERATION;
2457         *pos++ = sizeof(struct ieee80211_vht_operation);
2458         vht_oper = (struct ieee80211_vht_operation *)pos;
2459         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2460                                                         chandef->center_freq1);
2461         if (chandef->center_freq2)
2462                 vht_oper->center_freq_seg1_idx =
2463                         ieee80211_frequency_to_channel(chandef->center_freq2);
2464         else
2465                 vht_oper->center_freq_seg1_idx = 0x00;
2466
2467         switch (chandef->width) {
2468         case NL80211_CHAN_WIDTH_160:
2469                 /*
2470                  * Convert 160 MHz channel width to new style as interop
2471                  * workaround.
2472                  */
2473                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2474                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2475                 if (chandef->chan->center_freq < chandef->center_freq1)
2476                         vht_oper->center_freq_seg0_idx -= 8;
2477                 else
2478                         vht_oper->center_freq_seg0_idx += 8;
2479                 break;
2480         case NL80211_CHAN_WIDTH_80P80:
2481                 /*
2482                  * Convert 80+80 MHz channel width to new style as interop
2483                  * workaround.
2484                  */
2485                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2486                 break;
2487         case NL80211_CHAN_WIDTH_80:
2488                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2489                 break;
2490         default:
2491                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2492                 break;
2493         }
2494
2495         /* don't require special VHT peer rates */
2496         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2497
2498         return pos + sizeof(struct ieee80211_vht_operation);
2499 }
2500
2501 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2502                                struct cfg80211_chan_def *chandef)
2503 {
2504         enum nl80211_channel_type channel_type;
2505
2506         if (!ht_oper)
2507                 return false;
2508
2509         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2510         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2511                 channel_type = NL80211_CHAN_HT20;
2512                 break;
2513         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2514                 channel_type = NL80211_CHAN_HT40PLUS;
2515                 break;
2516         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2517                 channel_type = NL80211_CHAN_HT40MINUS;
2518                 break;
2519         default:
2520                 channel_type = NL80211_CHAN_NO_HT;
2521                 return false;
2522         }
2523
2524         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2525         return true;
2526 }
2527
2528 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2529                                 struct cfg80211_chan_def *chandef)
2530 {
2531         struct cfg80211_chan_def new = *chandef;
2532         int cf1, cf2;
2533
2534         if (!oper)
2535                 return false;
2536
2537         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2538                                              chandef->chan->band);
2539         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2540                                              chandef->chan->band);
2541
2542         switch (oper->chan_width) {
2543         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2544                 break;
2545         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2546                 new.width = NL80211_CHAN_WIDTH_80;
2547                 new.center_freq1 = cf1;
2548                 /* If needed, adjust based on the newer interop workaround. */
2549                 if (oper->center_freq_seg1_idx) {
2550                         unsigned int diff;
2551
2552                         diff = abs(oper->center_freq_seg1_idx -
2553                                    oper->center_freq_seg0_idx);
2554                         if (diff == 8) {
2555                                 new.width = NL80211_CHAN_WIDTH_160;
2556                                 new.center_freq1 = cf2;
2557                         } else if (diff > 8) {
2558                                 new.width = NL80211_CHAN_WIDTH_80P80;
2559                                 new.center_freq2 = cf2;
2560                         }
2561                 }
2562                 break;
2563         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2564                 new.width = NL80211_CHAN_WIDTH_160;
2565                 new.center_freq1 = cf1;
2566                 break;
2567         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2568                 new.width = NL80211_CHAN_WIDTH_80P80;
2569                 new.center_freq1 = cf1;
2570                 new.center_freq2 = cf2;
2571                 break;
2572         default:
2573                 return false;
2574         }
2575
2576         if (!cfg80211_chandef_valid(&new))
2577                 return false;
2578
2579         *chandef = new;
2580         return true;
2581 }
2582
2583 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2584                              const struct ieee80211_supported_band *sband,
2585                              const u8 *srates, int srates_len, u32 *rates)
2586 {
2587         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2588         int shift = ieee80211_chandef_get_shift(chandef);
2589         struct ieee80211_rate *br;
2590         int brate, rate, i, j, count = 0;
2591
2592         *rates = 0;
2593
2594         for (i = 0; i < srates_len; i++) {
2595                 rate = srates[i] & 0x7f;
2596
2597                 for (j = 0; j < sband->n_bitrates; j++) {
2598                         br = &sband->bitrates[j];
2599                         if ((rate_flags & br->flags) != rate_flags)
2600                                 continue;
2601
2602                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2603                         if (brate == rate) {
2604                                 *rates |= BIT(j);
2605                                 count++;
2606                                 break;
2607                         }
2608                 }
2609         }
2610         return count;
2611 }
2612
2613 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2614                             struct sk_buff *skb, bool need_basic,
2615                             enum nl80211_band band)
2616 {
2617         struct ieee80211_local *local = sdata->local;
2618         struct ieee80211_supported_band *sband;
2619         int rate, shift;
2620         u8 i, rates, *pos;
2621         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2622         u32 rate_flags;
2623
2624         shift = ieee80211_vif_get_shift(&sdata->vif);
2625         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2626         sband = local->hw.wiphy->bands[band];
2627         rates = 0;
2628         for (i = 0; i < sband->n_bitrates; i++) {
2629                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2630                         continue;
2631                 rates++;
2632         }
2633         if (rates > 8)
2634                 rates = 8;
2635
2636         if (skb_tailroom(skb) < rates + 2)
2637                 return -ENOMEM;
2638
2639         pos = skb_put(skb, rates + 2);
2640         *pos++ = WLAN_EID_SUPP_RATES;
2641         *pos++ = rates;
2642         for (i = 0; i < rates; i++) {
2643                 u8 basic = 0;
2644                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2645                         continue;
2646
2647                 if (need_basic && basic_rates & BIT(i))
2648                         basic = 0x80;
2649                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2650                                     5 * (1 << shift));
2651                 *pos++ = basic | (u8) rate;
2652         }
2653
2654         return 0;
2655 }
2656
2657 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2658                                 struct sk_buff *skb, bool need_basic,
2659                                 enum nl80211_band band)
2660 {
2661         struct ieee80211_local *local = sdata->local;
2662         struct ieee80211_supported_band *sband;
2663         int rate, shift;
2664         u8 i, exrates, *pos;
2665         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2666         u32 rate_flags;
2667
2668         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2669         shift = ieee80211_vif_get_shift(&sdata->vif);
2670
2671         sband = local->hw.wiphy->bands[band];
2672         exrates = 0;
2673         for (i = 0; i < sband->n_bitrates; i++) {
2674                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2675                         continue;
2676                 exrates++;
2677         }
2678
2679         if (exrates > 8)
2680                 exrates -= 8;
2681         else
2682                 exrates = 0;
2683
2684         if (skb_tailroom(skb) < exrates + 2)
2685                 return -ENOMEM;
2686
2687         if (exrates) {
2688                 pos = skb_put(skb, exrates + 2);
2689                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2690                 *pos++ = exrates;
2691                 for (i = 8; i < sband->n_bitrates; i++) {
2692                         u8 basic = 0;
2693                         if ((rate_flags & sband->bitrates[i].flags)
2694                             != rate_flags)
2695                                 continue;
2696                         if (need_basic && basic_rates & BIT(i))
2697                                 basic = 0x80;
2698                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2699                                             5 * (1 << shift));
2700                         *pos++ = basic | (u8) rate;
2701                 }
2702         }
2703         return 0;
2704 }
2705
2706 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2707 {
2708         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2709         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2710
2711         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2712                 /* non-managed type inferfaces */
2713                 return 0;
2714         }
2715         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2716 }
2717 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2718
2719 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2720 {
2721         if (!mcs)
2722                 return 1;
2723
2724         /* TODO: consider rx_highest */
2725
2726         if (mcs->rx_mask[3])
2727                 return 4;
2728         if (mcs->rx_mask[2])
2729                 return 3;
2730         if (mcs->rx_mask[1])
2731                 return 2;
2732         return 1;
2733 }
2734
2735 /**
2736  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2737  * @local: mac80211 hw info struct
2738  * @status: RX status
2739  * @mpdu_len: total MPDU length (including FCS)
2740  * @mpdu_offset: offset into MPDU to calculate timestamp at
2741  *
2742  * This function calculates the RX timestamp at the given MPDU offset, taking
2743  * into account what the RX timestamp was. An offset of 0 will just normalize
2744  * the timestamp to TSF at beginning of MPDU reception.
2745  */
2746 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2747                                      struct ieee80211_rx_status *status,
2748                                      unsigned int mpdu_len,
2749                                      unsigned int mpdu_offset)
2750 {
2751         u64 ts = status->mactime;
2752         struct rate_info ri;
2753         u16 rate;
2754
2755         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2756                 return 0;
2757
2758         memset(&ri, 0, sizeof(ri));
2759
2760         /* Fill cfg80211 rate info */
2761         switch (status->encoding) {
2762         case RX_ENC_HT:
2763                 ri.mcs = status->rate_idx;
2764                 ri.flags |= RATE_INFO_FLAGS_MCS;
2765                 ri.bw = status->bw;
2766                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2767                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2768                 break;
2769         case RX_ENC_VHT:
2770                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2771                 ri.mcs = status->rate_idx;
2772                 ri.nss = status->nss;
2773                 ri.bw = status->bw;
2774                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2775                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2776                 break;
2777         default:
2778                 WARN_ON(1);
2779                 /* fall through */
2780         case RX_ENC_LEGACY: {
2781                 struct ieee80211_supported_band *sband;
2782                 int shift = 0;
2783                 int bitrate;
2784
2785                 ri.bw = status->bw;
2786
2787                 switch (status->bw) {
2788                 case RATE_INFO_BW_10:
2789                         shift = 1;
2790                         break;
2791                 case RATE_INFO_BW_5:
2792                         shift = 2;
2793                         break;
2794                 }
2795
2796                 sband = local->hw.wiphy->bands[status->band];
2797                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2798                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2799
2800                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2801                         /* TODO: handle HT/VHT preambles */
2802                         if (status->band == NL80211_BAND_5GHZ) {
2803                                 ts += 20 << shift;
2804                                 mpdu_offset += 2;
2805                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2806                                 ts += 96;
2807                         } else {
2808                                 ts += 192;
2809                         }
2810                 }
2811                 break;
2812                 }
2813         }
2814
2815         rate = cfg80211_calculate_bitrate(&ri);
2816         if (WARN_ONCE(!rate,
2817                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2818                       (unsigned long long)status->flag, status->rate_idx,
2819                       status->nss))
2820                 return 0;
2821
2822         /* rewind from end of MPDU */
2823         if (status->flag & RX_FLAG_MACTIME_END)
2824                 ts -= mpdu_len * 8 * 10 / rate;
2825
2826         ts += mpdu_offset * 8 * 10 / rate;
2827
2828         return ts;
2829 }
2830
2831 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2832 {
2833         struct ieee80211_sub_if_data *sdata;
2834         struct cfg80211_chan_def chandef;
2835
2836         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2837         ASSERT_RTNL();
2838
2839         mutex_lock(&local->mtx);
2840         list_for_each_entry(sdata, &local->interfaces, list) {
2841                 /* it might be waiting for the local->mtx, but then
2842                  * by the time it gets it, sdata->wdev.cac_started
2843                  * will no longer be true
2844                  */
2845                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2846
2847                 if (sdata->wdev.cac_started) {
2848                         chandef = sdata->vif.bss_conf.chandef;
2849                         ieee80211_vif_release_channel(sdata);
2850                         cfg80211_cac_event(sdata->dev,
2851                                            &chandef,
2852                                            NL80211_RADAR_CAC_ABORTED,
2853                                            GFP_KERNEL);
2854                 }
2855         }
2856         mutex_unlock(&local->mtx);
2857 }
2858
2859 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2860 {
2861         struct ieee80211_local *local =
2862                 container_of(work, struct ieee80211_local, radar_detected_work);
2863         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2864         struct ieee80211_chanctx *ctx;
2865         int num_chanctx = 0;
2866
2867         mutex_lock(&local->chanctx_mtx);
2868         list_for_each_entry(ctx, &local->chanctx_list, list) {
2869                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2870                         continue;
2871
2872                 num_chanctx++;
2873                 chandef = ctx->conf.def;
2874         }
2875         mutex_unlock(&local->chanctx_mtx);
2876
2877         rtnl_lock();
2878         ieee80211_dfs_cac_cancel(local);
2879         rtnl_unlock();
2880
2881         if (num_chanctx > 1)
2882                 /* XXX: multi-channel is not supported yet */
2883                 WARN_ON(1);
2884         else
2885                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2886 }
2887
2888 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2889 {
2890         struct ieee80211_local *local = hw_to_local(hw);
2891
2892         trace_api_radar_detected(local);
2893
2894         schedule_work(&local->radar_detected_work);
2895 }
2896 EXPORT_SYMBOL(ieee80211_radar_detected);
2897
2898 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2899 {
2900         u32 ret;
2901         int tmp;
2902
2903         switch (c->width) {
2904         case NL80211_CHAN_WIDTH_20:
2905                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2906                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2907                 break;
2908         case NL80211_CHAN_WIDTH_40:
2909                 c->width = NL80211_CHAN_WIDTH_20;
2910                 c->center_freq1 = c->chan->center_freq;
2911                 ret = IEEE80211_STA_DISABLE_40MHZ |
2912                       IEEE80211_STA_DISABLE_VHT;
2913                 break;
2914         case NL80211_CHAN_WIDTH_80:
2915                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2916                 /* n_P40 */
2917                 tmp /= 2;
2918                 /* freq_P40 */
2919                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2920                 c->width = NL80211_CHAN_WIDTH_40;
2921                 ret = IEEE80211_STA_DISABLE_VHT;
2922                 break;
2923         case NL80211_CHAN_WIDTH_80P80:
2924                 c->center_freq2 = 0;
2925                 c->width = NL80211_CHAN_WIDTH_80;
2926                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2927                       IEEE80211_STA_DISABLE_160MHZ;
2928                 break;
2929         case NL80211_CHAN_WIDTH_160:
2930                 /* n_P20 */
2931                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2932                 /* n_P80 */
2933                 tmp /= 4;
2934                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2935                 c->width = NL80211_CHAN_WIDTH_80;
2936                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2937                       IEEE80211_STA_DISABLE_160MHZ;
2938                 break;
2939         default:
2940         case NL80211_CHAN_WIDTH_20_NOHT:
2941                 WARN_ON_ONCE(1);
2942                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2943                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2944                 break;
2945         case NL80211_CHAN_WIDTH_5:
2946         case NL80211_CHAN_WIDTH_10:
2947                 WARN_ON_ONCE(1);
2948                 /* keep c->width */
2949                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2950                 break;
2951         }
2952
2953         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2954
2955         return ret;
2956 }
2957
2958 /*
2959  * Returns true if smps_mode_new is strictly more restrictive than
2960  * smps_mode_old.
2961  */
2962 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2963                                    enum ieee80211_smps_mode smps_mode_new)
2964 {
2965         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2966                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2967                 return false;
2968
2969         switch (smps_mode_old) {
2970         case IEEE80211_SMPS_STATIC:
2971                 return false;
2972         case IEEE80211_SMPS_DYNAMIC:
2973                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2974         case IEEE80211_SMPS_OFF:
2975                 return smps_mode_new != IEEE80211_SMPS_OFF;
2976         default:
2977                 WARN_ON(1);
2978         }
2979
2980         return false;
2981 }
2982
2983 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2984                               struct cfg80211_csa_settings *csa_settings)
2985 {
2986         struct sk_buff *skb;
2987         struct ieee80211_mgmt *mgmt;
2988         struct ieee80211_local *local = sdata->local;
2989         int freq;
2990         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2991                                sizeof(mgmt->u.action.u.chan_switch);
2992         u8 *pos;
2993
2994         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2995             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2996                 return -EOPNOTSUPP;
2997
2998         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2999                             5 + /* channel switch announcement element */
3000                             3 + /* secondary channel offset element */
3001                             5 + /* wide bandwidth channel switch announcement */
3002                             8); /* mesh channel switch parameters element */
3003         if (!skb)
3004                 return -ENOMEM;
3005
3006         skb_reserve(skb, local->tx_headroom);
3007         mgmt = skb_put_zero(skb, hdr_len);
3008         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3009                                           IEEE80211_STYPE_ACTION);
3010
3011         eth_broadcast_addr(mgmt->da);
3012         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3013         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3014                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3015         } else {
3016                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3017                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3018         }
3019         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3020         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3021         pos = skb_put(skb, 5);
3022         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3023         *pos++ = 3;                                             /* IE length */
3024         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3025         freq = csa_settings->chandef.chan->center_freq;
3026         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3027         *pos++ = csa_settings->count;                           /* count */
3028
3029         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3030                 enum nl80211_channel_type ch_type;
3031
3032                 skb_put(skb, 3);
3033                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3034                 *pos++ = 1;                                     /* IE length */
3035                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3036                 if (ch_type == NL80211_CHAN_HT40PLUS)
3037                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3038                 else
3039                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3040         }
3041
3042         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3043                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3044
3045                 skb_put(skb, 8);
3046                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3047                 *pos++ = 6;                                     /* IE length */
3048                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3049                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3050                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3051                 *pos++ |= csa_settings->block_tx ?
3052                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3053                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3054                 pos += 2;
3055                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3056                 pos += 2;
3057         }
3058
3059         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3060             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3061             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3062                 skb_put(skb, 5);
3063                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3064         }
3065
3066         ieee80211_tx_skb(sdata, skb);
3067         return 0;
3068 }
3069
3070 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3071 {
3072         return !(cs == NULL || cs->cipher == 0 ||
3073                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3074                  cs->hdr_len <= cs->key_idx_off ||
3075                  cs->key_idx_shift > 7 ||
3076                  cs->key_idx_mask == 0);
3077 }
3078
3079 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3080 {
3081         int i;
3082
3083         /* Ensure we have enough iftype bitmap space for all iftype values */
3084         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3085
3086         for (i = 0; i < n; i++)
3087                 if (!ieee80211_cs_valid(&cs[i]))
3088                         return false;
3089
3090         return true;
3091 }
3092
3093 const struct ieee80211_cipher_scheme *
3094 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3095                  enum nl80211_iftype iftype)
3096 {
3097         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3098         int n = local->hw.n_cipher_schemes;
3099         int i;
3100         const struct ieee80211_cipher_scheme *cs = NULL;
3101
3102         for (i = 0; i < n; i++) {
3103                 if (l[i].cipher == cipher) {
3104                         cs = &l[i];
3105                         break;
3106                 }
3107         }
3108
3109         if (!cs || !(cs->iftype & BIT(iftype)))
3110                 return NULL;
3111
3112         return cs;
3113 }
3114
3115 int ieee80211_cs_headroom(struct ieee80211_local *local,
3116                           struct cfg80211_crypto_settings *crypto,
3117                           enum nl80211_iftype iftype)
3118 {
3119         const struct ieee80211_cipher_scheme *cs;
3120         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3121         int i;
3122
3123         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3124                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3125                                       iftype);
3126
3127                 if (cs && headroom < cs->hdr_len)
3128                         headroom = cs->hdr_len;
3129         }
3130
3131         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3132         if (cs && headroom < cs->hdr_len)
3133                 headroom = cs->hdr_len;
3134
3135         return headroom;
3136 }
3137
3138 static bool
3139 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3140 {
3141         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3142         int skip;
3143
3144         if (end > 0)
3145                 return false;
3146
3147         /* One shot NOA  */
3148         if (data->count[i] == 1)
3149                 return false;
3150
3151         if (data->desc[i].interval == 0)
3152                 return false;
3153
3154         /* End time is in the past, check for repetitions */
3155         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3156         if (data->count[i] < 255) {
3157                 if (data->count[i] <= skip) {
3158                         data->count[i] = 0;
3159                         return false;
3160                 }
3161
3162                 data->count[i] -= skip;
3163         }
3164
3165         data->desc[i].start += skip * data->desc[i].interval;
3166
3167         return true;
3168 }
3169
3170 static bool
3171 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3172                              s32 *offset)
3173 {
3174         bool ret = false;
3175         int i;
3176
3177         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3178                 s32 cur;
3179
3180                 if (!data->count[i])
3181                         continue;
3182
3183                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3184                         ret = true;
3185
3186                 cur = data->desc[i].start - tsf;
3187                 if (cur > *offset)
3188                         continue;
3189
3190                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3191                 if (cur > *offset)
3192                         *offset = cur;
3193         }
3194
3195         return ret;
3196 }
3197
3198 static u32
3199 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3200 {
3201         s32 offset = 0;
3202         int tries = 0;
3203         /*
3204          * arbitrary limit, used to avoid infinite loops when combined NoA
3205          * descriptors cover the full time period.
3206          */
3207         int max_tries = 5;
3208
3209         ieee80211_extend_absent_time(data, tsf, &offset);
3210         do {
3211                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3212                         break;
3213
3214                 tries++;
3215         } while (tries < max_tries);
3216
3217         return offset;
3218 }
3219
3220 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3221 {
3222         u32 next_offset = BIT(31) - 1;
3223         int i;
3224
3225         data->absent = 0;
3226         data->has_next_tsf = false;
3227         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3228                 s32 start;
3229
3230                 if (!data->count[i])
3231                         continue;
3232
3233                 ieee80211_extend_noa_desc(data, tsf, i);
3234                 start = data->desc[i].start - tsf;
3235                 if (start <= 0)
3236                         data->absent |= BIT(i);
3237
3238                 if (next_offset > start)
3239                         next_offset = start;
3240
3241                 data->has_next_tsf = true;
3242         }
3243
3244         if (data->absent)
3245                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3246
3247         data->next_tsf = tsf + next_offset;
3248 }
3249 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3250
3251 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3252                             struct ieee80211_noa_data *data, u32 tsf)
3253 {
3254         int ret = 0;
3255         int i;
3256
3257         memset(data, 0, sizeof(*data));
3258
3259         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3260                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3261
3262                 if (!desc->count || !desc->duration)
3263                         continue;
3264
3265                 data->count[i] = desc->count;
3266                 data->desc[i].start = le32_to_cpu(desc->start_time);
3267                 data->desc[i].duration = le32_to_cpu(desc->duration);
3268                 data->desc[i].interval = le32_to_cpu(desc->interval);
3269
3270                 if (data->count[i] > 1 &&
3271                     data->desc[i].interval < data->desc[i].duration)
3272                         continue;
3273
3274                 ieee80211_extend_noa_desc(data, tsf, i);
3275                 ret++;
3276         }
3277
3278         if (ret)
3279                 ieee80211_update_p2p_noa(data, tsf);
3280
3281         return ret;
3282 }
3283 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3284
3285 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3286                            struct ieee80211_sub_if_data *sdata)
3287 {
3288         u64 tsf = drv_get_tsf(local, sdata);
3289         u64 dtim_count = 0;
3290         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3291         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3292         struct ps_data *ps;
3293         u8 bcns_from_dtim;
3294
3295         if (tsf == -1ULL || !beacon_int || !dtim_period)
3296                 return;
3297
3298         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3299             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3300                 if (!sdata->bss)
3301                         return;
3302
3303                 ps = &sdata->bss->ps;
3304         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3305                 ps = &sdata->u.mesh.ps;
3306         } else {
3307                 return;
3308         }
3309
3310         /*
3311          * actually finds last dtim_count, mac80211 will update in
3312          * __beacon_add_tim().
3313          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3314          */
3315         do_div(tsf, beacon_int);
3316         bcns_from_dtim = do_div(tsf, dtim_period);
3317         /* just had a DTIM */
3318         if (!bcns_from_dtim)
3319                 dtim_count = 0;
3320         else
3321                 dtim_count = dtim_period - bcns_from_dtim;
3322
3323         ps->dtim_count = dtim_count;
3324 }
3325
3326 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3327                                          struct ieee80211_chanctx *ctx)
3328 {
3329         struct ieee80211_sub_if_data *sdata;
3330         u8 radar_detect = 0;
3331
3332         lockdep_assert_held(&local->chanctx_mtx);
3333
3334         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3335                 return 0;
3336
3337         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3338                 if (sdata->reserved_radar_required)
3339                         radar_detect |= BIT(sdata->reserved_chandef.width);
3340
3341         /*
3342          * An in-place reservation context should not have any assigned vifs
3343          * until it replaces the other context.
3344          */
3345         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3346                 !list_empty(&ctx->assigned_vifs));
3347
3348         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3349                 if (sdata->radar_required)
3350                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3351
3352         return radar_detect;
3353 }
3354
3355 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3356                                  const struct cfg80211_chan_def *chandef,
3357                                  enum ieee80211_chanctx_mode chanmode,
3358                                  u8 radar_detect)
3359 {
3360         struct ieee80211_local *local = sdata->local;
3361         struct ieee80211_sub_if_data *sdata_iter;
3362         enum nl80211_iftype iftype = sdata->wdev.iftype;
3363         struct ieee80211_chanctx *ctx;
3364         int total = 1;
3365         struct iface_combination_params params = {
3366                 .radar_detect = radar_detect,
3367         };
3368
3369         lockdep_assert_held(&local->chanctx_mtx);
3370
3371         if (WARN_ON(hweight32(radar_detect) > 1))
3372                 return -EINVAL;
3373
3374         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3375                     !chandef->chan))
3376                 return -EINVAL;
3377
3378         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3379                 return -EINVAL;
3380
3381         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3382             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3383                 /*
3384                  * always passing this is harmless, since it'll be the
3385                  * same value that cfg80211 finds if it finds the same
3386                  * interface ... and that's always allowed
3387                  */
3388                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3389         }
3390
3391         /* Always allow software iftypes */
3392         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3393                 if (radar_detect)
3394                         return -EINVAL;
3395                 return 0;
3396         }
3397
3398         if (chandef)
3399                 params.num_different_channels = 1;
3400
3401         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3402                 params.iftype_num[iftype] = 1;
3403
3404         list_for_each_entry(ctx, &local->chanctx_list, list) {
3405                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3406                         continue;
3407                 params.radar_detect |=
3408                         ieee80211_chanctx_radar_detect(local, ctx);
3409                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3410                         params.num_different_channels++;
3411                         continue;
3412                 }
3413                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3414                     cfg80211_chandef_compatible(chandef,
3415                                                 &ctx->conf.def))
3416                         continue;
3417                 params.num_different_channels++;
3418         }
3419
3420         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3421                 struct wireless_dev *wdev_iter;
3422
3423                 wdev_iter = &sdata_iter->wdev;
3424
3425                 if (sdata_iter == sdata ||
3426                     !ieee80211_sdata_running(sdata_iter) ||
3427                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3428                         continue;
3429
3430                 params.iftype_num[wdev_iter->iftype]++;
3431                 total++;
3432         }
3433
3434         if (total == 1 && !params.radar_detect)
3435                 return 0;
3436
3437         return cfg80211_check_combinations(local->hw.wiphy, &params);
3438 }
3439
3440 static void
3441 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3442                          void *data)
3443 {
3444         u32 *max_num_different_channels = data;
3445
3446         *max_num_different_channels = max(*max_num_different_channels,
3447                                           c->num_different_channels);
3448 }
3449
3450 int ieee80211_max_num_channels(struct ieee80211_local *local)
3451 {
3452         struct ieee80211_sub_if_data *sdata;
3453         struct ieee80211_chanctx *ctx;
3454         u32 max_num_different_channels = 1;
3455         int err;
3456         struct iface_combination_params params = {0};
3457
3458         lockdep_assert_held(&local->chanctx_mtx);
3459
3460         list_for_each_entry(ctx, &local->chanctx_list, list) {
3461                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3462                         continue;
3463
3464                 params.num_different_channels++;
3465
3466                 params.radar_detect |=
3467                         ieee80211_chanctx_radar_detect(local, ctx);
3468         }
3469
3470         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3471                 params.iftype_num[sdata->wdev.iftype]++;
3472
3473         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3474                                          ieee80211_iter_max_chans,
3475                                          &max_num_different_channels);
3476         if (err < 0)
3477                 return err;
3478
3479         return max_num_different_channels;
3480 }
3481
3482 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3483 {
3484         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3485         *buf++ = 7; /* len */
3486         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3487         *buf++ = 0x50;
3488         *buf++ = 0xf2;
3489         *buf++ = 2; /* WME */
3490         *buf++ = 0; /* WME info */
3491         *buf++ = 1; /* WME ver */
3492         *buf++ = qosinfo; /* U-APSD no in use */
3493
3494         return buf;
3495 }
3496
3497 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3498                              unsigned long *frame_cnt,
3499                              unsigned long *byte_cnt)
3500 {
3501         struct txq_info *txqi = to_txq_info(txq);
3502         u32 frag_cnt = 0, frag_bytes = 0;
3503         struct sk_buff *skb;
3504
3505         skb_queue_walk(&txqi->frags, skb) {
3506                 frag_cnt++;
3507                 frag_bytes += skb->len;
3508         }
3509
3510         if (frame_cnt)
3511                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3512
3513         if (byte_cnt)
3514                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3515 }
3516 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3517
3518 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3519         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3520         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3521         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3522         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3523 };