net/mac80211/util.c

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