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  * Copyright (C) 2018 Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * utilities for mac80211
  15  */
  16
  17 #include <net/mac80211.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/export.h>
  20 #include <linux/types.h>
  21 #include <linux/slab.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/bitmap.h>
  26 #include <linux/crc32.h>
  27 #include <net/net_namespace.h>
  28 #include <net/cfg80211.h>
  29 #include <net/rtnetlink.h>
  30
  31 #include "ieee80211_i.h"
  32 #include "driver-ops.h"
  33 #include "rate.h"
  34 #include "mesh.h"
  35 #include "wme.h"
  36 #include "led.h"
  37 #include "wep.h"
  38
  39 /* privid for wiphys to determine whether they belong to us or not */
  40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  41
  42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  43 {
  44         struct ieee80211_local *local;
  45         BUG_ON(!wiphy);
  46
  47         local = wiphy_priv(wiphy);
  48         return &local->hw;
  49 }
  50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  51
  52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  53 {
  54         struct sk_buff *skb;
  55         struct ieee80211_hdr *hdr;
  56
  57         skb_queue_walk(&tx->skbs, skb) {
  58                 hdr = (struct ieee80211_hdr *) skb->data;
  59                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  60         }
  61 }
  62
  63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  64                              int rate, int erp, int short_preamble,
  65                              int shift)
  66 {
  67         int dur;
  68
  69         /* calculate duration (in microseconds, rounded up to next higher
  70          * integer if it includes a fractional microsecond) to send frame of
  71          * len bytes (does not include FCS) at the given rate. Duration will
  72          * also include SIFS.
  73          *
  74          * rate is in 100 kbps, so divident is multiplied by 10 in the
  75          * DIV_ROUND_UP() operations.
  76          *
  77          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  78          * is assumed to be 0 otherwise.
  79          */
  80
  81         if (band == NL80211_BAND_5GHZ || erp) {
  82                 /*
  83                  * OFDM:
  84                  *
  85                  * N_DBPS = DATARATE x 4
  86                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  87                  *      (16 = SIGNAL time, 6 = tail bits)
  88                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  89                  *
  90                  * T_SYM = 4 usec
  91                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  92                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  93                  *      signal ext = 6 usec
  94                  */
  95                 dur = 16; /* SIFS + signal ext */
  96                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  97                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  98
  99                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 100                  *  * times 4 for 5 MHz
 101                  *  * times 2 for 10 MHz
 102                  */
 103                 dur *= 1 << shift;
 104
 105                 /* rates should already consider the channel bandwidth,
 106                  * don't apply divisor again.
 107                  */
 108                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 109                                         4 * rate); /* T_SYM x N_SYM */
 110         } else {
 111                 /*
 112                  * 802.11b or 802.11g with 802.11b compatibility:
 113                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 114                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 115                  *
 116                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 117                  * aSIFSTime = 10 usec
 118                  * aPreambleLength = 144 usec or 72 usec with short preamble
 119                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 120                  */
 121                 dur = 10; /* aSIFSTime = 10 usec */
 122                 dur += short_preamble ? (72 + 24) : (144 + 48);
 123
 124                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 125         }
 126
 127         return dur;
 128 }
 129
 130 /* Exported duration function for driver use */
 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 132                                         struct ieee80211_vif *vif,
 133                                         enum nl80211_band band,
 134                                         size_t frame_len,
 135                                         struct ieee80211_rate *rate)
 136 {
 137         struct ieee80211_sub_if_data *sdata;
 138         u16 dur;
 139         int erp, shift = 0;
 140         bool short_preamble = false;
 141
 142         erp = 0;
 143         if (vif) {
 144                 sdata = vif_to_sdata(vif);
 145                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 146                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 147                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 148                 shift = ieee80211_vif_get_shift(vif);
 149         }
 150
 151         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 152                                        short_preamble, shift);
 153
 154         return cpu_to_le16(dur);
 155 }
 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 157
 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 159                               struct ieee80211_vif *vif, size_t frame_len,
 160                               const struct ieee80211_tx_info *frame_txctl)
 161 {
 162         struct ieee80211_local *local = hw_to_local(hw);
 163         struct ieee80211_rate *rate;
 164         struct ieee80211_sub_if_data *sdata;
 165         bool short_preamble;
 166         int erp, shift = 0, bitrate;
 167         u16 dur;
 168         struct ieee80211_supported_band *sband;
 169
 170         sband = local->hw.wiphy->bands[frame_txctl->band];
 171
 172         short_preamble = false;
 173
 174         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 175
 176         erp = 0;
 177         if (vif) {
 178                 sdata = vif_to_sdata(vif);
 179                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 180                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 181                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 182                 shift = ieee80211_vif_get_shift(vif);
 183         }
 184
 185         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 186
 187         /* CTS duration */
 188         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 189                                        erp, short_preamble, shift);
 190         /* Data frame duration */
 191         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 192                                         erp, short_preamble, shift);
 193         /* ACK duration */
 194         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 195                                         erp, short_preamble, shift);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_rts_duration);
 200
 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 202                                     struct ieee80211_vif *vif,
 203                                     size_t frame_len,
 204                                     const struct ieee80211_tx_info *frame_txctl)
 205 {
 206         struct ieee80211_local *local = hw_to_local(hw);
 207         struct ieee80211_rate *rate;
 208         struct ieee80211_sub_if_data *sdata;
 209         bool short_preamble;
 210         int erp, shift = 0, bitrate;
 211         u16 dur;
 212         struct ieee80211_supported_band *sband;
 213
 214         sband = local->hw.wiphy->bands[frame_txctl->band];
 215
 216         short_preamble = false;
 217
 218         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225                 shift = ieee80211_vif_get_shift(vif);
 226         }
 227
 228         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 229
 230         /* Data frame duration */
 231         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 232                                        erp, short_preamble, shift);
 233         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 234                 /* ACK duration */
 235                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                                 erp, short_preamble, shift);
 237         }
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 242
 243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 244 {
 245         struct ieee80211_sub_if_data *sdata;
 246         int n_acs = IEEE80211_NUM_ACS;
 247
 248         if (local->ops->wake_tx_queue)
 249                 return;
 250
 251         if (local->hw.queues < IEEE80211_NUM_ACS)
 252                 n_acs = 1;
 253
 254         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 255                 int ac;
 256
 257                 if (!sdata->dev)
 258                         continue;
 259
 260                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 261                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 262                         continue;
 263
 264                 for (ac = 0; ac < n_acs; ac++) {
 265                         int ac_queue = sdata->vif.hw_queue[ac];
 266
 267                         if (ac_queue == queue ||
 268                             (sdata->vif.cab_queue == queue &&
 269                              local->queue_stop_reasons[ac_queue] == 0 &&
 270                              skb_queue_empty(&local->pending[ac_queue])))
 271                                 netif_wake_subqueue(sdata->dev, ac);
 272                 }
 273         }
 274 }
 275
 276 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 277                                    enum queue_stop_reason reason,
 278                                    bool refcounted)
 279 {
 280         struct ieee80211_local *local = hw_to_local(hw);
 281
 282         trace_wake_queue(local, queue, reason);
 283
 284         if (WARN_ON(queue >= hw->queues))
 285                 return;
 286
 287         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 288                 return;
 289
 290         if (!refcounted) {
 291                 local->q_stop_reasons[queue][reason] = 0;
 292         } else {
 293                 local->q_stop_reasons[queue][reason]--;
 294                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 295                         local->q_stop_reasons[queue][reason] = 0;
 296         }
 297
 298         if (local->q_stop_reasons[queue][reason] == 0)
 299                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 300
 301         if (local->queue_stop_reasons[queue] != 0)
 302                 /* someone still has this queue stopped */
 303                 return;
 304
 305         if (skb_queue_empty(&local->pending[queue])) {
 306                 rcu_read_lock();
 307                 ieee80211_propagate_queue_wake(local, queue);
 308                 rcu_read_unlock();
 309         } else
 310                 tasklet_schedule(&local->tx_pending_tasklet);
 311 }
 312
 313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 314                                     enum queue_stop_reason reason,
 315                                     bool refcounted)
 316 {
 317         struct ieee80211_local *local = hw_to_local(hw);
 318         unsigned long flags;
 319
 320         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 321         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 322         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 323 }
 324
 325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 326 {
 327         ieee80211_wake_queue_by_reason(hw, queue,
 328                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 329                                        false);
 330 }
 331 EXPORT_SYMBOL(ieee80211_wake_queue);
 332
 333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 334                                    enum queue_stop_reason reason,
 335                                    bool refcounted)
 336 {
 337         struct ieee80211_local *local = hw_to_local(hw);
 338         struct ieee80211_sub_if_data *sdata;
 339         int n_acs = IEEE80211_NUM_ACS;
 340
 341         trace_stop_queue(local, queue, reason);
 342
 343         if (WARN_ON(queue >= hw->queues))
 344                 return;
 345
 346         if (!refcounted)
 347                 local->q_stop_reasons[queue][reason] = 1;
 348         else
 349                 local->q_stop_reasons[queue][reason]++;
 350
 351         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 352                 return;
 353
 354         if (local->ops->wake_tx_queue)
 355                 return;
 356
 357         if (local->hw.queues < IEEE80211_NUM_ACS)
 358                 n_acs = 1;
 359
 360         rcu_read_lock();
 361         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 362                 int ac;
 363
 364                 if (!sdata->dev)
 365                         continue;
 366
 367                 for (ac = 0; ac < n_acs; ac++) {
 368                         if (sdata->vif.hw_queue[ac] == queue ||
 369                             sdata->vif.cab_queue == queue)
 370                                 netif_stop_subqueue(sdata->dev, ac);
 371                 }
 372         }
 373         rcu_read_unlock();
 374 }
 375
 376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 377                                     enum queue_stop_reason reason,
 378                                     bool refcounted)
 379 {
 380         struct ieee80211_local *local = hw_to_local(hw);
 381         unsigned long flags;
 382
 383         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 384         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 385         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 386 }
 387
 388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 389 {
 390         ieee80211_stop_queue_by_reason(hw, queue,
 391                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 392                                        false);
 393 }
 394 EXPORT_SYMBOL(ieee80211_stop_queue);
 395
 396 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 397                                struct sk_buff *skb)
 398 {
 399         struct ieee80211_hw *hw = &local->hw;
 400         unsigned long flags;
 401         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 402         int queue = info->hw_queue;
 403
 404         if (WARN_ON(!info->control.vif)) {
 405                 ieee80211_free_txskb(&local->hw, skb);
 406                 return;
 407         }
 408
 409         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 410         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 411                                false);
 412         __skb_queue_tail(&local->pending[queue], skb);
 413         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 414                                false);
 415         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 416 }
 417
 418 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 419                                 struct sk_buff_head *skbs)
 420 {
 421         struct ieee80211_hw *hw = &local->hw;
 422         struct sk_buff *skb;
 423         unsigned long flags;
 424         int queue, i;
 425
 426         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 427         while ((skb = skb_dequeue(skbs))) {
 428                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 429
 430                 if (WARN_ON(!info->control.vif)) {
 431                         ieee80211_free_txskb(&local->hw, skb);
 432                         continue;
 433                 }
 434
 435                 queue = info->hw_queue;
 436
 437                 __ieee80211_stop_queue(hw, queue,
 438                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 439                                 false);
 440
 441                 __skb_queue_tail(&local->pending[queue], skb);
 442         }
 443
 444         for (i = 0; i < hw->queues; i++)
 445                 __ieee80211_wake_queue(hw, i,
 446                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 447                         false);
 448         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 449 }
 450
 451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 452                                      unsigned long queues,
 453                                      enum queue_stop_reason reason,
 454                                      bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         unsigned long flags;
 458         int i;
 459
 460         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 461
 462         for_each_set_bit(i, &queues, hw->queues)
 463                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 464
 465         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 466 }
 467
 468 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 469 {
 470         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 471                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 472                                         false);
 473 }
 474 EXPORT_SYMBOL(ieee80211_stop_queues);
 475
 476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 477 {
 478         struct ieee80211_local *local = hw_to_local(hw);
 479         unsigned long flags;
 480         int ret;
 481
 482         if (WARN_ON(queue >= hw->queues))
 483                 return true;
 484
 485         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 486         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 487                        &local->queue_stop_reasons[queue]);
 488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 489         return ret;
 490 }
 491 EXPORT_SYMBOL(ieee80211_queue_stopped);
 492
 493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 494                                      unsigned long queues,
 495                                      enum queue_stop_reason reason,
 496                                      bool refcounted)
 497 {
 498         struct ieee80211_local *local = hw_to_local(hw);
 499         unsigned long flags;
 500         int i;
 501
 502         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 503
 504         for_each_set_bit(i, &queues, hw->queues)
 505                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 506
 507         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 508 }
 509
 510 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 511 {
 512         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 513                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 514                                         false);
 515 }
 516 EXPORT_SYMBOL(ieee80211_wake_queues);
 517
 518 static unsigned int
 519 ieee80211_get_vif_queues(struct ieee80211_local *local,
 520                          struct ieee80211_sub_if_data *sdata)
 521 {
 522         unsigned int queues;
 523
 524         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 525                 int ac;
 526
 527                 queues = 0;
 528
 529                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 530                         queues |= BIT(sdata->vif.hw_queue[ac]);
 531                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 532                         queues |= BIT(sdata->vif.cab_queue);
 533         } else {
 534                 /* all queues */
 535                 queues = BIT(local->hw.queues) - 1;
 536         }
 537
 538         return queues;
 539 }
 540
 541 void __ieee80211_flush_queues(struct ieee80211_local *local,
 542                               struct ieee80211_sub_if_data *sdata,
 543                               unsigned int queues, bool drop)
 544 {
 545         if (!local->ops->flush)
 546                 return;
 547
 548         /*
 549          * If no queue was set, or if the HW doesn't support
 550          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 551          */
 552         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 553                 queues = ieee80211_get_vif_queues(local, sdata);
 554
 555         ieee80211_stop_queues_by_reason(&local->hw, queues,
 556                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 557                                         false);
 558
 559         drv_flush(local, sdata, queues, drop);
 560
 561         ieee80211_wake_queues_by_reason(&local->hw, queues,
 562                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 563                                         false);
 564 }
 565
 566 void ieee80211_flush_queues(struct ieee80211_local *local,
 567                             struct ieee80211_sub_if_data *sdata, bool drop)
 568 {
 569         __ieee80211_flush_queues(local, sdata, 0, drop);
 570 }
 571
 572 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 573                                struct ieee80211_sub_if_data *sdata,
 574                                enum queue_stop_reason reason)
 575 {
 576         ieee80211_stop_queues_by_reason(&local->hw,
 577                                         ieee80211_get_vif_queues(local, sdata),
 578                                         reason, true);
 579 }
 580
 581 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 582                                struct ieee80211_sub_if_data *sdata,
 583                                enum queue_stop_reason reason)
 584 {
 585         ieee80211_wake_queues_by_reason(&local->hw,
 586                                         ieee80211_get_vif_queues(local, sdata),
 587                                         reason, true);
 588 }
 589
 590 static void __iterate_interfaces(struct ieee80211_local *local,
 591                                  u32 iter_flags,
 592                                  void (*iterator)(void *data, u8 *mac,
 593                                                   struct ieee80211_vif *vif),
 594                                  void *data)
 595 {
 596         struct ieee80211_sub_if_data *sdata;
 597         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 598
 599         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 600                 switch (sdata->vif.type) {
 601                 case NL80211_IFTYPE_MONITOR:
 602                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 603                                 continue;
 604                         break;
 605                 case NL80211_IFTYPE_AP_VLAN:
 606                         continue;
 607                 default:
 608                         break;
 609                 }
 610                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 611                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 612                         continue;
 613                 if (ieee80211_sdata_running(sdata) || !active_only)
 614                         iterator(data, sdata->vif.addr,
 615                                  &sdata->vif);
 616         }
 617
 618         sdata = rcu_dereference_check(local->monitor_sdata,
 619                                       lockdep_is_held(&local->iflist_mtx) ||
 620                                       lockdep_rtnl_is_held());
 621         if (sdata &&
 622             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 623              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 624                 iterator(data, sdata->vif.addr, &sdata->vif);
 625 }
 626
 627 void ieee80211_iterate_interfaces(
 628         struct ieee80211_hw *hw, u32 iter_flags,
 629         void (*iterator)(void *data, u8 *mac,
 630                          struct ieee80211_vif *vif),
 631         void *data)
 632 {
 633         struct ieee80211_local *local = hw_to_local(hw);
 634
 635         mutex_lock(&local->iflist_mtx);
 636         __iterate_interfaces(local, iter_flags, iterator, data);
 637         mutex_unlock(&local->iflist_mtx);
 638 }
 639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 640
 641 void ieee80211_iterate_active_interfaces_atomic(
 642         struct ieee80211_hw *hw, u32 iter_flags,
 643         void (*iterator)(void *data, u8 *mac,
 644                          struct ieee80211_vif *vif),
 645         void *data)
 646 {
 647         struct ieee80211_local *local = hw_to_local(hw);
 648
 649         rcu_read_lock();
 650         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 651                              iterator, data);
 652         rcu_read_unlock();
 653 }
 654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 655
 656 void ieee80211_iterate_active_interfaces_rtnl(
 657         struct ieee80211_hw *hw, u32 iter_flags,
 658         void (*iterator)(void *data, u8 *mac,
 659                          struct ieee80211_vif *vif),
 660         void *data)
 661 {
 662         struct ieee80211_local *local = hw_to_local(hw);
 663
 664         ASSERT_RTNL();
 665
 666         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 667                              iterator, data);
 668 }
 669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 670
 671 static void __iterate_stations(struct ieee80211_local *local,
 672                                void (*iterator)(void *data,
 673                                                 struct ieee80211_sta *sta),
 674                                void *data)
 675 {
 676         struct sta_info *sta;
 677
 678         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 679                 if (!sta->uploaded)
 680                         continue;
 681
 682                 iterator(data, &sta->sta);
 683         }
 684 }
 685
 686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 687                         void (*iterator)(void *data,
 688                                          struct ieee80211_sta *sta),
 689                         void *data)
 690 {
 691         struct ieee80211_local *local = hw_to_local(hw);
 692
 693         rcu_read_lock();
 694         __iterate_stations(local, iterator, data);
 695         rcu_read_unlock();
 696 }
 697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 698
 699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 700 {
 701         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 702
 703         if (!ieee80211_sdata_running(sdata) ||
 704             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 705                 return NULL;
 706         return &sdata->vif;
 707 }
 708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 709
 710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 711 {
 712         struct ieee80211_sub_if_data *sdata;
 713
 714         if (!vif)
 715                 return NULL;
 716
 717         sdata = vif_to_sdata(vif);
 718
 719         if (!ieee80211_sdata_running(sdata) ||
 720             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 721                 return NULL;
 722
 723         return &sdata->wdev;
 724 }
 725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 726
 727 /*
 728  * Nothing should have been stuffed into the workqueue during
 729  * the suspend->resume cycle. Since we can't check each caller
 730  * of this function if we are already quiescing / suspended,
 731  * check here and don't WARN since this can actually happen when
 732  * the rx path (for example) is racing against __ieee80211_suspend
 733  * and suspending / quiescing was set after the rx path checked
 734  * them.
 735  */
 736 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 737 {
 738         if (local->quiescing || (local->suspended && !local->resuming)) {
 739                 pr_warn("queueing ieee80211 work while going to suspend\n");
 740                 return false;
 741         }
 742
 743         return true;
 744 }
 745
 746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 747 {
 748         struct ieee80211_local *local = hw_to_local(hw);
 749
 750         if (!ieee80211_can_queue_work(local))
 751                 return;
 752
 753         queue_work(local->workqueue, work);
 754 }
 755 EXPORT_SYMBOL(ieee80211_queue_work);
 756
 757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 758                                   struct delayed_work *dwork,
 759                                   unsigned long delay)
 760 {
 761         struct ieee80211_local *local = hw_to_local(hw);
 762
 763         if (!ieee80211_can_queue_work(local))
 764                 return;
 765
 766         queue_delayed_work(local->workqueue, dwork, delay);
 767 }
 768 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 769
 770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 771                                struct ieee802_11_elems *elems,
 772                                u64 filter, u32 crc)
 773 {
 774         size_t left = len;
 775         const u8 *pos = start;
 776         bool calc_crc = filter != 0;
 777         DECLARE_BITMAP(seen_elems, 256);
 778         const u8 *ie;
 779
 780         bitmap_zero(seen_elems, 256);
 781         memset(elems, 0, sizeof(*elems));
 782         elems->ie_start = start;
 783         elems->total_len = len;
 784
 785         while (left >= 2) {
 786                 u8 id, elen;
 787                 bool elem_parse_failed;
 788
 789                 id = *pos++;
 790                 elen = *pos++;
 791                 left -= 2;
 792
 793                 if (elen > left) {
 794                         elems->parse_error = true;
 795                         break;
 796                 }
 797
 798                 switch (id) {
 799                 case WLAN_EID_SSID:
 800                 case WLAN_EID_SUPP_RATES:
 801                 case WLAN_EID_FH_PARAMS:
 802                 case WLAN_EID_DS_PARAMS:
 803                 case WLAN_EID_CF_PARAMS:
 804                 case WLAN_EID_TIM:
 805                 case WLAN_EID_IBSS_PARAMS:
 806                 case WLAN_EID_CHALLENGE:
 807                 case WLAN_EID_RSN:
 808                 case WLAN_EID_ERP_INFO:
 809                 case WLAN_EID_EXT_SUPP_RATES:
 810                 case WLAN_EID_HT_CAPABILITY:
 811                 case WLAN_EID_HT_OPERATION:
 812                 case WLAN_EID_VHT_CAPABILITY:
 813                 case WLAN_EID_VHT_OPERATION:
 814                 case WLAN_EID_MESH_ID:
 815                 case WLAN_EID_MESH_CONFIG:
 816                 case WLAN_EID_PEER_MGMT:
 817                 case WLAN_EID_PREQ:
 818                 case WLAN_EID_PREP:
 819                 case WLAN_EID_PERR:
 820                 case WLAN_EID_RANN:
 821                 case WLAN_EID_CHANNEL_SWITCH:
 822                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 823                 case WLAN_EID_COUNTRY:
 824                 case WLAN_EID_PWR_CONSTRAINT:
 825                 case WLAN_EID_TIMEOUT_INTERVAL:
 826                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 827                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 828                 case WLAN_EID_CHAN_SWITCH_PARAM:
 829                 case WLAN_EID_EXT_CAPABILITY:
 830                 case WLAN_EID_CHAN_SWITCH_TIMING:
 831                 case WLAN_EID_LINK_ID:
 832                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 833                 /*
 834                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 835                  * that if the content gets bigger it might be needed more than once
 836                  */
 837                         if (test_bit(id, seen_elems)) {
 838                                 elems->parse_error = true;
 839                                 left -= elen;
 840                                 pos += elen;
 841                                 continue;
 842                         }
 843                         break;
 844                 }
 845
 846                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 847                         crc = crc32_be(crc, pos - 2, elen + 2);
 848
 849                 elem_parse_failed = false;
 850
 851                 switch (id) {
 852                 case WLAN_EID_LINK_ID:
 853                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 854                                 elem_parse_failed = true;
 855                                 break;
 856                         }
 857                         elems->lnk_id = (void *)(pos - 2);
 858                         break;
 859                 case WLAN_EID_CHAN_SWITCH_TIMING:
 860                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 861                                 elem_parse_failed = true;
 862                                 break;
 863                         }
 864                         elems->ch_sw_timing = (void *)pos;
 865                         break;
 866                 case WLAN_EID_EXT_CAPABILITY:
 867                         elems->ext_capab = pos;
 868                         elems->ext_capab_len = elen;
 869                         break;
 870                 case WLAN_EID_SSID:
 871                         elems->ssid = pos;
 872                         elems->ssid_len = elen;
 873                         break;
 874                 case WLAN_EID_SUPP_RATES:
 875                         elems->supp_rates = pos;
 876                         elems->supp_rates_len = elen;
 877                         break;
 878                 case WLAN_EID_DS_PARAMS:
 879                         if (elen >= 1)
 880                                 elems->ds_params = pos;
 881                         else
 882                                 elem_parse_failed = true;
 883                         break;
 884                 case WLAN_EID_TIM:
 885                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 886                                 elems->tim = (void *)pos;
 887                                 elems->tim_len = elen;
 888                         } else
 889                                 elem_parse_failed = true;
 890                         break;
 891                 case WLAN_EID_CHALLENGE:
 892                         elems->challenge = pos;
 893                         elems->challenge_len = elen;
 894                         break;
 895                 case WLAN_EID_VENDOR_SPECIFIC:
 896                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 897                             pos[2] == 0xf2) {
 898                                 /* Microsoft OUI (00:50:F2) */
 899
 900                                 if (calc_crc)
 901                                         crc = crc32_be(crc, pos - 2, elen + 2);
 902
 903                                 if (elen >= 5 && pos[3] == 2) {
 904                                         /* OUI Type 2 - WMM IE */
 905                                         if (pos[4] == 0) {
 906                                                 elems->wmm_info = pos;
 907                                                 elems->wmm_info_len = elen;
 908                                         } else if (pos[4] == 1) {
 909                                                 elems->wmm_param = pos;
 910                                                 elems->wmm_param_len = elen;
 911                                         }
 912                                 }
 913                         }
 914                         break;
 915                 case WLAN_EID_RSN:
 916                         elems->rsn = pos;
 917                         elems->rsn_len = elen;
 918                         break;
 919                 case WLAN_EID_ERP_INFO:
 920                         if (elen >= 1)
 921                                 elems->erp_info = pos;
 922                         else
 923                                 elem_parse_failed = true;
 924                         break;
 925                 case WLAN_EID_EXT_SUPP_RATES:
 926                         elems->ext_supp_rates = pos;
 927                         elems->ext_supp_rates_len = elen;
 928                         break;
 929                 case WLAN_EID_HT_CAPABILITY:
 930                         if (elen >= sizeof(struct ieee80211_ht_cap))
 931                                 elems->ht_cap_elem = (void *)pos;
 932                         else
 933                                 elem_parse_failed = true;
 934                         break;
 935                 case WLAN_EID_HT_OPERATION:
 936                         if (elen >= sizeof(struct ieee80211_ht_operation))
 937                                 elems->ht_operation = (void *)pos;
 938                         else
 939                                 elem_parse_failed = true;
 940                         break;
 941                 case WLAN_EID_VHT_CAPABILITY:
 942                         if (elen >= sizeof(struct ieee80211_vht_cap))
 943                                 elems->vht_cap_elem = (void *)pos;
 944                         else
 945                                 elem_parse_failed = true;
 946                         break;
 947                 case WLAN_EID_VHT_OPERATION:
 948                         if (elen >= sizeof(struct ieee80211_vht_operation))
 949                                 elems->vht_operation = (void *)pos;
 950                         else
 951                                 elem_parse_failed = true;
 952                         break;
 953                 case WLAN_EID_OPMODE_NOTIF:
 954                         if (elen > 0)
 955                                 elems->opmode_notif = pos;
 956                         else
 957                                 elem_parse_failed = true;
 958                         break;
 959                 case WLAN_EID_MESH_ID:
 960                         elems->mesh_id = pos;
 961                         elems->mesh_id_len = elen;
 962                         break;
 963                 case WLAN_EID_MESH_CONFIG:
 964                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 965                                 elems->mesh_config = (void *)pos;
 966                         else
 967                                 elem_parse_failed = true;
 968                         break;
 969                 case WLAN_EID_PEER_MGMT:
 970                         elems->peering = pos;
 971                         elems->peering_len = elen;
 972                         break;
 973                 case WLAN_EID_MESH_AWAKE_WINDOW:
 974                         if (elen >= 2)
 975                                 elems->awake_window = (void *)pos;
 976                         break;
 977                 case WLAN_EID_PREQ:
 978                         elems->preq = pos;
 979                         elems->preq_len = elen;
 980                         break;
 981                 case WLAN_EID_PREP:
 982                         elems->prep = pos;
 983                         elems->prep_len = elen;
 984                         break;
 985                 case WLAN_EID_PERR:
 986                         elems->perr = pos;
 987                         elems->perr_len = elen;
 988                         break;
 989                 case WLAN_EID_RANN:
 990                         if (elen >= sizeof(struct ieee80211_rann_ie))
 991                                 elems->rann = (void *)pos;
 992                         else
 993                                 elem_parse_failed = true;
 994                         break;
 995                 case WLAN_EID_CHANNEL_SWITCH:
 996                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 997                                 elem_parse_failed = true;
 998                                 break;
 999                         }
1000                         elems->ch_switch_ie = (void *)pos;
1001                         break;
1002                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1003                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1004                                 elem_parse_failed = true;
1005                                 break;
1006                         }
1007                         elems->ext_chansw_ie = (void *)pos;
1008                         break;
1009                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1010                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->sec_chan_offs = (void *)pos;
1015                         break;
1016                 case WLAN_EID_CHAN_SWITCH_PARAM:
1017                         if (elen !=
1018                             sizeof(*elems->mesh_chansw_params_ie)) {
1019                                 elem_parse_failed = true;
1020                                 break;
1021                         }
1022                         elems->mesh_chansw_params_ie = (void *)pos;
1023                         break;
1024                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1025                         if (!action ||
1026                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1027                                 elem_parse_failed = true;
1028                                 break;
1029                         }
1030                         elems->wide_bw_chansw_ie = (void *)pos;
1031                         break;
1032                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1033                         if (action) {
1034                                 elem_parse_failed = true;
1035                                 break;
1036                         }
1037                         /*
1038                          * This is a bit tricky, but as we only care about
1039                          * the wide bandwidth channel switch element, so
1040                          * just parse it out manually.
1041                          */
1042                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1043                                               pos, elen);
1044                         if (ie) {
1045                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1046                                         elems->wide_bw_chansw_ie =
1047                                                 (void *)(ie + 2);
1048                                 else
1049                                         elem_parse_failed = true;
1050                         }
1051                         break;
1052                 case WLAN_EID_COUNTRY:
1053                         elems->country_elem = pos;
1054                         elems->country_elem_len = elen;
1055                         break;
1056                 case WLAN_EID_PWR_CONSTRAINT:
1057                         if (elen != 1) {
1058                                 elem_parse_failed = true;
1059                                 break;
1060                         }
1061                         elems->pwr_constr_elem = pos;
1062                         break;
1063                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1064                         /* Lots of different options exist, but we only care
1065                          * about the Dynamic Transmit Power Control element.
1066                          * First check for the Cisco OUI, then for the DTPC
1067                          * tag (0x00).
1068                          */
1069                         if (elen < 4) {
1070                                 elem_parse_failed = true;
1071                                 break;
1072                         }
1073
1074                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1075                             pos[2] != 0x96 || pos[3] != 0x00)
1076                                 break;
1077
1078                         if (elen != 6) {
1079                                 elem_parse_failed = true;
1080                                 break;
1081                         }
1082
1083                         if (calc_crc)
1084                                 crc = crc32_be(crc, pos - 2, elen + 2);
1085
1086                         elems->cisco_dtpc_elem = pos;
1087                         break;
1088                 case WLAN_EID_TIMEOUT_INTERVAL:
1089                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1090                                 elems->timeout_int = (void *)pos;
1091                         else
1092                                 elem_parse_failed = true;
1093                         break;
1094                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1095                         if (elen >= sizeof(*elems->max_idle_period_ie))
1096                                 elems->max_idle_period_ie = (void *)pos;
1097                         break;
1098                 default:
1099                         break;
1100                 }
1101
1102                 if (elem_parse_failed)
1103                         elems->parse_error = true;
1104                 else
1105                         __set_bit(id, seen_elems);
1106
1107                 left -= elen;
1108                 pos += elen;
1109         }
1110
1111         if (left != 0)
1112                 elems->parse_error = true;
1113
1114         return crc;
1115 }
1116
1117 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1118                                            struct ieee80211_tx_queue_params
1119                                            *qparam, int ac)
1120 {
1121         struct ieee80211_chanctx_conf *chanctx_conf;
1122         const struct ieee80211_reg_rule *rrule;
1123         struct ieee80211_wmm_ac *wmm_ac;
1124         u16 center_freq = 0;
1125
1126         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1127             sdata->vif.type != NL80211_IFTYPE_STATION)
1128                 return;
1129
1130         rcu_read_lock();
1131         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1132         if (chanctx_conf)
1133                 center_freq = chanctx_conf->def.chan->center_freq;
1134
1135         if (!center_freq) {
1136                 rcu_read_unlock();
1137                 return;
1138         }
1139
1140         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1141
1142         if (IS_ERR_OR_NULL(rrule) || !rrule->wmm_rule) {
1143                 rcu_read_unlock();
1144                 return;
1145         }
1146
1147         if (sdata->vif.type == NL80211_IFTYPE_AP)
1148                 wmm_ac = &rrule->wmm_rule->ap[ac];
1149         else
1150                 wmm_ac = &rrule->wmm_rule->client[ac];
1151         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1152         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1153         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1154         qparam->txop = !qparam->txop ? wmm_ac->cot / 32 :
1155                 min_t(u16, qparam->txop, wmm_ac->cot / 32);
1156         rcu_read_unlock();
1157 }
1158
1159 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1160                                bool bss_notify, bool enable_qos)
1161 {
1162         struct ieee80211_local *local = sdata->local;
1163         struct ieee80211_tx_queue_params qparam;
1164         struct ieee80211_chanctx_conf *chanctx_conf;
1165         int ac;
1166         bool use_11b;
1167         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1168         int aCWmin, aCWmax;
1169
1170         if (!local->ops->conf_tx)
1171                 return;
1172
1173         if (local->hw.queues < IEEE80211_NUM_ACS)
1174                 return;
1175
1176         memset(&qparam, 0, sizeof(qparam));
1177
1178         rcu_read_lock();
1179         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1180         use_11b = (chanctx_conf &&
1181                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1182                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1183         rcu_read_unlock();
1184
1185         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1186
1187         /* Set defaults according to 802.11-2007 Table 7-37 */
1188         aCWmax = 1023;
1189         if (use_11b)
1190                 aCWmin = 31;
1191         else
1192                 aCWmin = 15;
1193
1194         /* Confiure old 802.11b/g medium access rules. */
1195         qparam.cw_max = aCWmax;
1196         qparam.cw_min = aCWmin;
1197         qparam.txop = 0;
1198         qparam.aifs = 2;
1199
1200         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1201                 /* Update if QoS is enabled. */
1202                 if (enable_qos) {
1203                         switch (ac) {
1204                         case IEEE80211_AC_BK:
1205                                 qparam.cw_max = aCWmax;
1206                                 qparam.cw_min = aCWmin;
1207                                 qparam.txop = 0;
1208                                 if (is_ocb)
1209                                         qparam.aifs = 9;
1210                                 else
1211                                         qparam.aifs = 7;
1212                                 break;
1213                         /* never happens but let's not leave undefined */
1214                         default:
1215                         case IEEE80211_AC_BE:
1216                                 qparam.cw_max = aCWmax;
1217                                 qparam.cw_min = aCWmin;
1218                                 qparam.txop = 0;
1219                                 if (is_ocb)
1220                                         qparam.aifs = 6;
1221                                 else
1222                                         qparam.aifs = 3;
1223                                 break;
1224                         case IEEE80211_AC_VI:
1225                                 qparam.cw_max = aCWmin;
1226                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1227                                 if (is_ocb)
1228                                         qparam.txop = 0;
1229                                 else if (use_11b)
1230                                         qparam.txop = 6016/32;
1231                                 else
1232                                         qparam.txop = 3008/32;
1233
1234                                 if (is_ocb)
1235                                         qparam.aifs = 3;
1236                                 else
1237                                         qparam.aifs = 2;
1238                                 break;
1239                         case IEEE80211_AC_VO:
1240                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1241                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1242                                 if (is_ocb)
1243                                         qparam.txop = 0;
1244                                 else if (use_11b)
1245                                         qparam.txop = 3264/32;
1246                                 else
1247                                         qparam.txop = 1504/32;
1248                                 qparam.aifs = 2;
1249                                 break;
1250                         }
1251                 }
1252                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1253
1254                 qparam.uapsd = false;
1255
1256                 sdata->tx_conf[ac] = qparam;
1257                 drv_conf_tx(local, sdata, ac, &qparam);
1258         }
1259
1260         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1261             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1262             sdata->vif.type != NL80211_IFTYPE_NAN) {
1263                 sdata->vif.bss_conf.qos = enable_qos;
1264                 if (bss_notify)
1265                         ieee80211_bss_info_change_notify(sdata,
1266                                                          BSS_CHANGED_QOS);
1267         }
1268 }
1269
1270 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1271                          u16 transaction, u16 auth_alg, u16 status,
1272                          const u8 *extra, size_t extra_len, const u8 *da,
1273                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1274                          u32 tx_flags)
1275 {
1276         struct ieee80211_local *local = sdata->local;
1277         struct sk_buff *skb;
1278         struct ieee80211_mgmt *mgmt;
1279         int err;
1280
1281         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1282         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1283                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1284         if (!skb)
1285                 return;
1286
1287         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1288
1289         mgmt = skb_put_zero(skb, 24 + 6);
1290         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1291                                           IEEE80211_STYPE_AUTH);
1292         memcpy(mgmt->da, da, ETH_ALEN);
1293         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1294         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1295         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1296         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1297         mgmt->u.auth.status_code = cpu_to_le16(status);
1298         if (extra)
1299                 skb_put_data(skb, extra, extra_len);
1300
1301         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1302                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1303                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1304                 WARN_ON(err);
1305         }
1306
1307         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1308                                         tx_flags;
1309         ieee80211_tx_skb(sdata, skb);
1310 }
1311
1312 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1313                                     const u8 *bssid, u16 stype, u16 reason,
1314                                     bool send_frame, u8 *frame_buf)
1315 {
1316         struct ieee80211_local *local = sdata->local;
1317         struct sk_buff *skb;
1318         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1319
1320         /* build frame */
1321         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1322         mgmt->duration = 0; /* initialize only */
1323         mgmt->seq_ctrl = 0; /* initialize only */
1324         memcpy(mgmt->da, bssid, ETH_ALEN);
1325         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1326         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1327         /* u.deauth.reason_code == u.disassoc.reason_code */
1328         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1329
1330         if (send_frame) {
1331                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1332                                     IEEE80211_DEAUTH_FRAME_LEN);
1333                 if (!skb)
1334                         return;
1335
1336                 skb_reserve(skb, local->hw.extra_tx_headroom);
1337
1338                 /* copy in frame */
1339                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1340
1341                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1342                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1343                         IEEE80211_SKB_CB(skb)->flags |=
1344                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1345
1346                 ieee80211_tx_skb(sdata, skb);
1347         }
1348 }
1349
1350 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1351                                          u8 *buffer, size_t buffer_len,
1352                                          const u8 *ie, size_t ie_len,
1353                                          enum nl80211_band band,
1354                                          u32 rate_mask,
1355                                          struct cfg80211_chan_def *chandef,
1356                                          size_t *offset)
1357 {
1358         struct ieee80211_supported_band *sband;
1359         u8 *pos = buffer, *end = buffer + buffer_len;
1360         size_t noffset;
1361         int supp_rates_len, i;
1362         u8 rates[32];
1363         int num_rates;
1364         int ext_rates_len;
1365         int shift;
1366         u32 rate_flags;
1367         bool have_80mhz = false;
1368
1369         *offset = 0;
1370
1371         sband = local->hw.wiphy->bands[band];
1372         if (WARN_ON_ONCE(!sband))
1373                 return 0;
1374
1375         rate_flags = ieee80211_chandef_rate_flags(chandef);
1376         shift = ieee80211_chandef_get_shift(chandef);
1377
1378         num_rates = 0;
1379         for (i = 0; i < sband->n_bitrates; i++) {
1380                 if ((BIT(i) & rate_mask) == 0)
1381                         continue; /* skip rate */
1382                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1383                         continue;
1384
1385                 rates[num_rates++] =
1386                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1387                                           (1 << shift) * 5);
1388         }
1389
1390         supp_rates_len = min_t(int, num_rates, 8);
1391
1392         if (end - pos < 2 + supp_rates_len)
1393                 goto out_err;
1394         *pos++ = WLAN_EID_SUPP_RATES;
1395         *pos++ = supp_rates_len;
1396         memcpy(pos, rates, supp_rates_len);
1397         pos += supp_rates_len;
1398
1399         /* insert "request information" if in custom IEs */
1400         if (ie && ie_len) {
1401                 static const u8 before_extrates[] = {
1402                         WLAN_EID_SSID,
1403                         WLAN_EID_SUPP_RATES,
1404                         WLAN_EID_REQUEST,
1405                 };
1406                 noffset = ieee80211_ie_split(ie, ie_len,
1407                                              before_extrates,
1408                                              ARRAY_SIZE(before_extrates),
1409                                              *offset);
1410                 if (end - pos < noffset - *offset)
1411                         goto out_err;
1412                 memcpy(pos, ie + *offset, noffset - *offset);
1413                 pos += noffset - *offset;
1414                 *offset = noffset;
1415         }
1416
1417         ext_rates_len = num_rates - supp_rates_len;
1418         if (ext_rates_len > 0) {
1419                 if (end - pos < 2 + ext_rates_len)
1420                         goto out_err;
1421                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1422                 *pos++ = ext_rates_len;
1423                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1424                 pos += ext_rates_len;
1425         }
1426
1427         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1428                 if (end - pos < 3)
1429                         goto out_err;
1430                 *pos++ = WLAN_EID_DS_PARAMS;
1431                 *pos++ = 1;
1432                 *pos++ = ieee80211_frequency_to_channel(
1433                                 chandef->chan->center_freq);
1434         }
1435
1436         /* insert custom IEs that go before HT */
1437         if (ie && ie_len) {
1438                 static const u8 before_ht[] = {
1439                         /*
1440                          * no need to list the ones split off already
1441                          * (or generated here)
1442                          */
1443                         WLAN_EID_DS_PARAMS,
1444                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1445                 };
1446                 noffset = ieee80211_ie_split(ie, ie_len,
1447                                              before_ht, ARRAY_SIZE(before_ht),
1448                                              *offset);
1449                 if (end - pos < noffset - *offset)
1450                         goto out_err;
1451                 memcpy(pos, ie + *offset, noffset - *offset);
1452                 pos += noffset - *offset;
1453                 *offset = noffset;
1454         }
1455
1456         if (sband->ht_cap.ht_supported) {
1457                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1458                         goto out_err;
1459                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1460                                                 sband->ht_cap.cap);
1461         }
1462
1463         /*
1464          * If adding more here, adjust code in main.c
1465          * that calculates local->scan_ies_len.
1466          */
1467
1468         /* insert custom IEs that go before VHT */
1469         if (ie && ie_len) {
1470                 static const u8 before_vht[] = {
1471                         /*
1472                          * no need to list the ones split off already
1473                          * (or generated here)
1474                          */
1475                         WLAN_EID_BSS_COEX_2040,
1476                         WLAN_EID_EXT_CAPABILITY,
1477                         WLAN_EID_SSID_LIST,
1478                         WLAN_EID_CHANNEL_USAGE,
1479                         WLAN_EID_INTERWORKING,
1480                         WLAN_EID_MESH_ID,
1481                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1482                 };
1483                 noffset = ieee80211_ie_split(ie, ie_len,
1484                                              before_vht, ARRAY_SIZE(before_vht),
1485                                              *offset);
1486                 if (end - pos < noffset - *offset)
1487                         goto out_err;
1488                 memcpy(pos, ie + *offset, noffset - *offset);
1489                 pos += noffset - *offset;
1490                 *offset = noffset;
1491         }
1492
1493         /* Check if any channel in this sband supports at least 80 MHz */
1494         for (i = 0; i < sband->n_channels; i++) {
1495                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1496                                                 IEEE80211_CHAN_NO_80MHZ))
1497                         continue;
1498
1499                 have_80mhz = true;
1500                 break;
1501         }
1502
1503         if (sband->vht_cap.vht_supported && have_80mhz) {
1504                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1505                         goto out_err;
1506                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1507                                                  sband->vht_cap.cap);
1508         }
1509
1510         return pos - buffer;
1511  out_err:
1512         WARN_ONCE(1, "not enough space for preq IEs\n");
1513         return pos - buffer;
1514 }
1515
1516 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1517                              size_t buffer_len,
1518                              struct ieee80211_scan_ies *ie_desc,
1519                              const u8 *ie, size_t ie_len,
1520                              u8 bands_used, u32 *rate_masks,
1521                              struct cfg80211_chan_def *chandef)
1522 {
1523         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1524         int i;
1525
1526         memset(ie_desc, 0, sizeof(*ie_desc));
1527
1528         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1529                 if (bands_used & BIT(i)) {
1530                         pos += ieee80211_build_preq_ies_band(local,
1531                                                              buffer + pos,
1532                                                              buffer_len - pos,
1533                                                              ie, ie_len, i,
1534                                                              rate_masks[i],
1535                                                              chandef,
1536                                                              &custom_ie_offset);
1537                         ie_desc->ies[i] = buffer + old_pos;
1538                         ie_desc->len[i] = pos - old_pos;
1539                         old_pos = pos;
1540                 }
1541         }
1542
1543         /* add any remaining custom IEs */
1544         if (ie && ie_len) {
1545                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1546                               "not enough space for preq custom IEs\n"))
1547                         return pos;
1548                 memcpy(buffer + pos, ie + custom_ie_offset,
1549                        ie_len - custom_ie_offset);
1550                 ie_desc->common_ies = buffer + pos;
1551                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1552                 pos += ie_len - custom_ie_offset;
1553         }
1554
1555         return pos;
1556 };
1557
1558 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1559                                           const u8 *src, const u8 *dst,
1560                                           u32 ratemask,
1561                                           struct ieee80211_channel *chan,
1562                                           const u8 *ssid, size_t ssid_len,
1563                                           const u8 *ie, size_t ie_len,
1564                                           bool directed)
1565 {
1566         struct ieee80211_local *local = sdata->local;
1567         struct cfg80211_chan_def chandef;
1568         struct sk_buff *skb;
1569         struct ieee80211_mgmt *mgmt;
1570         int ies_len;
1571         u32 rate_masks[NUM_NL80211_BANDS] = {};
1572         struct ieee80211_scan_ies dummy_ie_desc;
1573
1574         /*
1575          * Do not send DS Channel parameter for directed probe requests
1576          * in order to maximize the chance that we get a response.  Some
1577          * badly-behaved APs don't respond when this parameter is included.
1578          */
1579         chandef.width = sdata->vif.bss_conf.chandef.width;
1580         if (directed)
1581                 chandef.chan = NULL;
1582         else
1583                 chandef.chan = chan;
1584
1585         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1586                                      100 + ie_len);
1587         if (!skb)
1588                 return NULL;
1589
1590         rate_masks[chan->band] = ratemask;
1591         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1592                                            skb_tailroom(skb), &dummy_ie_desc,
1593                                            ie, ie_len, BIT(chan->band),
1594                                            rate_masks, &chandef);
1595         skb_put(skb, ies_len);
1596
1597         if (dst) {
1598                 mgmt = (struct ieee80211_mgmt *) skb->data;
1599                 memcpy(mgmt->da, dst, ETH_ALEN);
1600                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1601         }
1602
1603         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1604
1605         return skb;
1606 }
1607
1608 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1609                               const u8 *src, const u8 *dst,
1610                               const u8 *ssid, size_t ssid_len,
1611                               const u8 *ie, size_t ie_len,
1612                               u32 ratemask, bool directed, u32 tx_flags,
1613                               struct ieee80211_channel *channel, bool scan)
1614 {
1615         struct sk_buff *skb;
1616
1617         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1618                                         ssid, ssid_len,
1619                                         ie, ie_len, directed);
1620         if (skb) {
1621                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1622                 if (scan)
1623                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1624                 else
1625                         ieee80211_tx_skb(sdata, skb);
1626         }
1627 }
1628
1629 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1630                             struct ieee802_11_elems *elems,
1631                             enum nl80211_band band, u32 *basic_rates)
1632 {
1633         struct ieee80211_supported_band *sband;
1634         size_t num_rates;
1635         u32 supp_rates, rate_flags;
1636         int i, j, shift;
1637
1638         sband = sdata->local->hw.wiphy->bands[band];
1639         if (WARN_ON(!sband))
1640                 return 1;
1641
1642         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1643         shift = ieee80211_vif_get_shift(&sdata->vif);
1644
1645         num_rates = sband->n_bitrates;
1646         supp_rates = 0;
1647         for (i = 0; i < elems->supp_rates_len +
1648                      elems->ext_supp_rates_len; i++) {
1649                 u8 rate = 0;
1650                 int own_rate;
1651                 bool is_basic;
1652                 if (i < elems->supp_rates_len)
1653                         rate = elems->supp_rates[i];
1654                 else if (elems->ext_supp_rates)
1655                         rate = elems->ext_supp_rates
1656                                 [i - elems->supp_rates_len];
1657                 own_rate = 5 * (rate & 0x7f);
1658                 is_basic = !!(rate & 0x80);
1659
1660                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1661                         continue;
1662
1663                 for (j = 0; j < num_rates; j++) {
1664                         int brate;
1665                         if ((rate_flags & sband->bitrates[j].flags)
1666                             != rate_flags)
1667                                 continue;
1668
1669                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1670                                              1 << shift);
1671
1672                         if (brate == own_rate) {
1673                                 supp_rates |= BIT(j);
1674                                 if (basic_rates && is_basic)
1675                                         *basic_rates |= BIT(j);
1676                         }
1677                 }
1678         }
1679         return supp_rates;
1680 }
1681
1682 void ieee80211_stop_device(struct ieee80211_local *local)
1683 {
1684         ieee80211_led_radio(local, false);
1685         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1686
1687         cancel_work_sync(&local->reconfig_filter);
1688
1689         flush_workqueue(local->workqueue);
1690         drv_stop(local);
1691 }
1692
1693 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1694                                            bool aborted)
1695 {
1696         /* It's possible that we don't handle the scan completion in
1697          * time during suspend, so if it's still marked as completed
1698          * here, queue the work and flush it to clean things up.
1699          * Instead of calling the worker function directly here, we
1700          * really queue it to avoid potential races with other flows
1701          * scheduling the same work.
1702          */
1703         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1704                 /* If coming from reconfiguration failure, abort the scan so
1705                  * we don't attempt to continue a partial HW scan - which is
1706                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1707                  * completed scan, and a 5 GHz portion is still pending.
1708                  */
1709                 if (aborted)
1710                         set_bit(SCAN_ABORTED, &local->scanning);
1711                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1712                 flush_delayed_work(&local->scan_work);
1713         }
1714 }
1715
1716 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1717 {
1718         struct ieee80211_sub_if_data *sdata;
1719         struct ieee80211_chanctx *ctx;
1720
1721         /*
1722          * We get here if during resume the device can't be restarted properly.
1723          * We might also get here if this happens during HW reset, which is a
1724          * slightly different situation and we need to drop all connections in
1725          * the latter case.
1726          *
1727          * Ask cfg80211 to turn off all interfaces, this will result in more
1728          * warnings but at least we'll then get into a clean stopped state.
1729          */
1730
1731         local->resuming = false;
1732         local->suspended = false;
1733         local->in_reconfig = false;
1734
1735         ieee80211_flush_completed_scan(local, true);
1736
1737         /* scheduled scan clearly can't be running any more, but tell
1738          * cfg80211 and clear local state
1739          */
1740         ieee80211_sched_scan_end(local);
1741
1742         list_for_each_entry(sdata, &local->interfaces, list)
1743                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1744
1745         /* Mark channel contexts as not being in the driver any more to avoid
1746          * removing them from the driver during the shutdown process...
1747          */
1748         mutex_lock(&local->chanctx_mtx);
1749         list_for_each_entry(ctx, &local->chanctx_list, list)
1750                 ctx->driver_present = false;
1751         mutex_unlock(&local->chanctx_mtx);
1752
1753         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1754 }
1755
1756 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1757                                      struct ieee80211_sub_if_data *sdata)
1758 {
1759         struct ieee80211_chanctx_conf *conf;
1760         struct ieee80211_chanctx *ctx;
1761
1762         if (!local->use_chanctx)
1763                 return;
1764
1765         mutex_lock(&local->chanctx_mtx);
1766         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1767                                          lockdep_is_held(&local->chanctx_mtx));
1768         if (conf) {
1769                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1770                 drv_assign_vif_chanctx(local, sdata, ctx);
1771         }
1772         mutex_unlock(&local->chanctx_mtx);
1773 }
1774
1775 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1776 {
1777         struct ieee80211_local *local = sdata->local;
1778         struct sta_info *sta;
1779
1780         /* add STAs back */
1781         mutex_lock(&local->sta_mtx);
1782         list_for_each_entry(sta, &local->sta_list, list) {
1783                 enum ieee80211_sta_state state;
1784
1785                 if (!sta->uploaded || sta->sdata != sdata)
1786                         continue;
1787
1788                 for (state = IEEE80211_STA_NOTEXIST;
1789                      state < sta->sta_state; state++)
1790                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1791                                               state + 1));
1792         }
1793         mutex_unlock(&local->sta_mtx);
1794 }
1795
1796 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1797 {
1798         struct cfg80211_nan_func *func, **funcs;
1799         int res, id, i = 0;
1800
1801         res = drv_start_nan(sdata->local, sdata,
1802                             &sdata->u.nan.conf);
1803         if (WARN_ON(res))
1804                 return res;
1805
1806         funcs = kzalloc((sdata->local->hw.max_nan_de_entries + 1) *
1807                         sizeof(*funcs), GFP_KERNEL);
1808         if (!funcs)
1809                 return -ENOMEM;
1810
1811         /* Add all the functions:
1812          * This is a little bit ugly. We need to call a potentially sleeping
1813          * callback for each NAN function, so we can't hold the spinlock.
1814          */
1815         spin_lock_bh(&sdata->u.nan.func_lock);
1816
1817         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1818                 funcs[i++] = func;
1819
1820         spin_unlock_bh(&sdata->u.nan.func_lock);
1821
1822         for (i = 0; funcs[i]; i++) {
1823                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1824                 if (WARN_ON(res))
1825                         ieee80211_nan_func_terminated(&sdata->vif,
1826                                                       funcs[i]->instance_id,
1827                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1828                                                       GFP_KERNEL);
1829         }
1830
1831         kfree(funcs);
1832
1833         return 0;
1834 }
1835
1836 int ieee80211_reconfig(struct ieee80211_local *local)
1837 {
1838         struct ieee80211_hw *hw = &local->hw;
1839         struct ieee80211_sub_if_data *sdata;
1840         struct ieee80211_chanctx *ctx;
1841         struct sta_info *sta;
1842         int res, i;
1843         bool reconfig_due_to_wowlan = false;
1844         struct ieee80211_sub_if_data *sched_scan_sdata;
1845         struct cfg80211_sched_scan_request *sched_scan_req;
1846         bool sched_scan_stopped = false;
1847         bool suspended = local->suspended;
1848
1849         /* nothing to do if HW shouldn't run */
1850         if (!local->open_count)
1851                 goto wake_up;
1852
1853 #ifdef CONFIG_PM
1854         if (suspended)
1855                 local->resuming = true;
1856
1857         if (local->wowlan) {
1858                 /*
1859                  * In the wowlan case, both mac80211 and the device
1860                  * are functional when the resume op is called, so
1861                  * clear local->suspended so the device could operate
1862                  * normally (e.g. pass rx frames).
1863                  */
1864                 local->suspended = false;
1865                 res = drv_resume(local);
1866                 local->wowlan = false;
1867                 if (res < 0) {
1868                         local->resuming = false;
1869                         return res;
1870                 }
1871                 if (res == 0)
1872                         goto wake_up;
1873                 WARN_ON(res > 1);
1874                 /*
1875                  * res is 1, which means the driver requested
1876                  * to go through a regular reset on wakeup.
1877                  * restore local->suspended in this case.
1878                  */
1879                 reconfig_due_to_wowlan = true;
1880                 local->suspended = true;
1881         }
1882 #endif
1883
1884         /*
1885          * In case of hw_restart during suspend (without wowlan),
1886          * cancel restart work, as we are reconfiguring the device
1887          * anyway.
1888          * Note that restart_work is scheduled on a frozen workqueue,
1889          * so we can't deadlock in this case.
1890          */
1891         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1892                 cancel_work_sync(&local->restart_work);
1893
1894         local->started = false;
1895
1896         /*
1897          * Upon resume hardware can sometimes be goofy due to
1898          * various platform / driver / bus issues, so restarting
1899          * the device may at times not work immediately. Propagate
1900          * the error.
1901          */
1902         res = drv_start(local);
1903         if (res) {
1904                 if (suspended)
1905                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1906                 else
1907                         WARN(1, "Hardware became unavailable during restart.\n");
1908                 ieee80211_handle_reconfig_failure(local);
1909                 return res;
1910         }
1911
1912         /* setup fragmentation threshold */
1913         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1914
1915         /* setup RTS threshold */
1916         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1917
1918         /* reset coverage class */
1919         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1920
1921         ieee80211_led_radio(local, true);
1922         ieee80211_mod_tpt_led_trig(local,
1923                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1924
1925         /* add interfaces */
1926         sdata = rtnl_dereference(local->monitor_sdata);
1927         if (sdata) {
1928                 /* in HW restart it exists already */
1929                 WARN_ON(local->resuming);
1930                 res = drv_add_interface(local, sdata);
1931                 if (WARN_ON(res)) {
1932                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1933                         synchronize_net();
1934                         kfree(sdata);
1935                 }
1936         }
1937
1938         list_for_each_entry(sdata, &local->interfaces, list) {
1939                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1940                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1941                     ieee80211_sdata_running(sdata)) {
1942                         res = drv_add_interface(local, sdata);
1943                         if (WARN_ON(res))
1944                                 break;
1945                 }
1946         }
1947
1948         /* If adding any of the interfaces failed above, roll back and
1949          * report failure.
1950          */
1951         if (res) {
1952                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1953                                                      list)
1954                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1955                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1956                             ieee80211_sdata_running(sdata))
1957                                 drv_remove_interface(local, sdata);
1958                 ieee80211_handle_reconfig_failure(local);
1959                 return res;
1960         }
1961
1962         /* add channel contexts */
1963         if (local->use_chanctx) {
1964                 mutex_lock(&local->chanctx_mtx);
1965                 list_for_each_entry(ctx, &local->chanctx_list, list)
1966                         if (ctx->replace_state !=
1967                             IEEE80211_CHANCTX_REPLACES_OTHER)
1968                                 WARN_ON(drv_add_chanctx(local, ctx));
1969                 mutex_unlock(&local->chanctx_mtx);
1970
1971                 sdata = rtnl_dereference(local->monitor_sdata);
1972                 if (sdata && ieee80211_sdata_running(sdata))
1973                         ieee80211_assign_chanctx(local, sdata);
1974         }
1975
1976         /* reconfigure hardware */
1977         ieee80211_hw_config(local, ~0);
1978
1979         ieee80211_configure_filter(local);
1980
1981         /* Finally also reconfigure all the BSS information */
1982         list_for_each_entry(sdata, &local->interfaces, list) {
1983                 u32 changed;
1984
1985                 if (!ieee80211_sdata_running(sdata))
1986                         continue;
1987
1988                 ieee80211_assign_chanctx(local, sdata);
1989
1990                 switch (sdata->vif.type) {
1991                 case NL80211_IFTYPE_AP_VLAN:
1992                 case NL80211_IFTYPE_MONITOR:
1993                         break;
1994                 default:
1995                         ieee80211_reconfig_stations(sdata);
1996                         /* fall through */
1997                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1998                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1999                                 drv_conf_tx(local, sdata, i,
2000                                             &sdata->tx_conf[i]);
2001                         break;
2002                 }
2003
2004                 /* common change flags for all interface types */
2005                 changed = BSS_CHANGED_ERP_CTS_PROT |
2006                           BSS_CHANGED_ERP_PREAMBLE |
2007                           BSS_CHANGED_ERP_SLOT |
2008                           BSS_CHANGED_HT |
2009                           BSS_CHANGED_BASIC_RATES |
2010                           BSS_CHANGED_BEACON_INT |
2011                           BSS_CHANGED_BSSID |
2012                           BSS_CHANGED_CQM |
2013                           BSS_CHANGED_QOS |
2014                           BSS_CHANGED_IDLE |
2015                           BSS_CHANGED_TXPOWER |
2016                           BSS_CHANGED_MCAST_RATE;
2017
2018                 if (sdata->vif.mu_mimo_owner)
2019                         changed |= BSS_CHANGED_MU_GROUPS;
2020
2021                 switch (sdata->vif.type) {
2022                 case NL80211_IFTYPE_STATION:
2023                         changed |= BSS_CHANGED_ASSOC |
2024                                    BSS_CHANGED_ARP_FILTER |
2025                                    BSS_CHANGED_PS;
2026
2027                         /* Re-send beacon info report to the driver */
2028                         if (sdata->u.mgd.have_beacon)
2029                                 changed |= BSS_CHANGED_BEACON_INFO;
2030
2031                         if (sdata->vif.bss_conf.max_idle_period ||
2032                             sdata->vif.bss_conf.protected_keep_alive)
2033                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2034
2035                         sdata_lock(sdata);
2036                         ieee80211_bss_info_change_notify(sdata, changed);
2037                         sdata_unlock(sdata);
2038                         break;
2039                 case NL80211_IFTYPE_OCB:
2040                         changed |= BSS_CHANGED_OCB;
2041                         ieee80211_bss_info_change_notify(sdata, changed);
2042                         break;
2043                 case NL80211_IFTYPE_ADHOC:
2044                         changed |= BSS_CHANGED_IBSS;
2045                         /* fall through */
2046                 case NL80211_IFTYPE_AP:
2047                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2048
2049                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2050                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2051
2052                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2053                                         drv_start_ap(local, sdata);
2054                         }
2055
2056                         /* fall through */
2057                 case NL80211_IFTYPE_MESH_POINT:
2058                         if (sdata->vif.bss_conf.enable_beacon) {
2059                                 changed |= BSS_CHANGED_BEACON |
2060                                            BSS_CHANGED_BEACON_ENABLED;
2061                                 ieee80211_bss_info_change_notify(sdata, changed);
2062                         }
2063                         break;
2064                 case NL80211_IFTYPE_NAN:
2065                         res = ieee80211_reconfig_nan(sdata);
2066                         if (res < 0) {
2067                                 ieee80211_handle_reconfig_failure(local);
2068                                 return res;
2069                         }
2070                         break;
2071                 case NL80211_IFTYPE_WDS:
2072                 case NL80211_IFTYPE_AP_VLAN:
2073                 case NL80211_IFTYPE_MONITOR:
2074                 case NL80211_IFTYPE_P2P_DEVICE:
2075                         /* nothing to do */
2076                         break;
2077                 case NL80211_IFTYPE_UNSPECIFIED:
2078                 case NUM_NL80211_IFTYPES:
2079                 case NL80211_IFTYPE_P2P_CLIENT:
2080                 case NL80211_IFTYPE_P2P_GO:
2081                         WARN_ON(1);
2082                         break;
2083                 }
2084         }
2085
2086         ieee80211_recalc_ps(local);
2087
2088         /*
2089          * The sta might be in psm against the ap (e.g. because
2090          * this was the state before a hw restart), so we
2091          * explicitly send a null packet in order to make sure
2092          * it'll sync against the ap (and get out of psm).
2093          */
2094         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2095                 list_for_each_entry(sdata, &local->interfaces, list) {
2096                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2097                                 continue;
2098                         if (!sdata->u.mgd.associated)
2099                                 continue;
2100
2101                         ieee80211_send_nullfunc(local, sdata, false);
2102                 }
2103         }
2104
2105         /* APs are now beaconing, add back stations */
2106         mutex_lock(&local->sta_mtx);
2107         list_for_each_entry(sta, &local->sta_list, list) {
2108                 enum ieee80211_sta_state state;
2109
2110                 if (!sta->uploaded)
2111                         continue;
2112
2113                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2114                         continue;
2115
2116                 for (state = IEEE80211_STA_NOTEXIST;
2117                      state < sta->sta_state; state++)
2118                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2119                                               state + 1));
2120         }
2121         mutex_unlock(&local->sta_mtx);
2122
2123         /* add back keys */
2124         list_for_each_entry(sdata, &local->interfaces, list)
2125                 ieee80211_reset_crypto_tx_tailroom(sdata);
2126
2127         list_for_each_entry(sdata, &local->interfaces, list)
2128                 if (ieee80211_sdata_running(sdata))
2129                         ieee80211_enable_keys(sdata);
2130
2131         /* Reconfigure sched scan if it was interrupted by FW restart */
2132         mutex_lock(&local->mtx);
2133         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2134                                                 lockdep_is_held(&local->mtx));
2135         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2136                                                 lockdep_is_held(&local->mtx));
2137         if (sched_scan_sdata && sched_scan_req)
2138                 /*
2139                  * Sched scan stopped, but we don't want to report it. Instead,
2140                  * we're trying to reschedule. However, if more than one scan
2141                  * plan was set, we cannot reschedule since we don't know which
2142                  * scan plan was currently running (and some scan plans may have
2143                  * already finished).
2144                  */
2145                 if (sched_scan_req->n_scan_plans > 1 ||
2146                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2147                                                          sched_scan_req)) {
2148                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2149                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2150                         sched_scan_stopped = true;
2151                 }
2152         mutex_unlock(&local->mtx);
2153
2154         if (sched_scan_stopped)
2155                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2156
2157  wake_up:
2158
2159         if (local->monitors == local->open_count && local->monitors > 0)
2160                 ieee80211_add_virtual_monitor(local);
2161
2162         /*
2163          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2164          * sessions can be established after a resume.
2165          *
2166          * Also tear down aggregation sessions since reconfiguring
2167          * them in a hardware restart scenario is not easily done
2168          * right now, and the hardware will have lost information
2169          * about the sessions, but we and the AP still think they
2170          * are active. This is really a workaround though.
2171          */
2172         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2173                 mutex_lock(&local->sta_mtx);
2174
2175                 list_for_each_entry(sta, &local->sta_list, list) {
2176                         if (!local->resuming)
2177                                 ieee80211_sta_tear_down_BA_sessions(
2178                                                 sta, AGG_STOP_LOCAL_REQUEST);
2179                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2180                 }
2181
2182                 mutex_unlock(&local->sta_mtx);
2183         }
2184
2185         if (local->in_reconfig) {
2186                 local->in_reconfig = false;
2187                 barrier();
2188
2189                 /* Restart deferred ROCs */
2190                 mutex_lock(&local->mtx);
2191                 ieee80211_start_next_roc(local);
2192                 mutex_unlock(&local->mtx);
2193         }
2194
2195         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2196                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2197                                         false);
2198
2199         /*
2200          * If this is for hw restart things are still running.
2201          * We may want to change that later, however.
2202          */
2203         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2204                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2205
2206         if (!suspended)
2207                 return 0;
2208
2209 #ifdef CONFIG_PM
2210         /* first set suspended false, then resuming */
2211         local->suspended = false;
2212         mb();
2213         local->resuming = false;
2214
2215         ieee80211_flush_completed_scan(local, false);
2216
2217         if (local->open_count && !reconfig_due_to_wowlan)
2218                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2219
2220         list_for_each_entry(sdata, &local->interfaces, list) {
2221                 if (!ieee80211_sdata_running(sdata))
2222                         continue;
2223                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2224                         ieee80211_sta_restart(sdata);
2225         }
2226
2227         mod_timer(&local->sta_cleanup, jiffies + 1);
2228 #else
2229         WARN_ON(1);
2230 #endif
2231
2232         return 0;
2233 }
2234
2235 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2236 {
2237         struct ieee80211_sub_if_data *sdata;
2238         struct ieee80211_local *local;
2239         struct ieee80211_key *key;
2240
2241         if (WARN_ON(!vif))
2242                 return;
2243
2244         sdata = vif_to_sdata(vif);
2245         local = sdata->local;
2246
2247         if (WARN_ON(!local->resuming))
2248                 return;
2249
2250         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2251                 return;
2252
2253         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2254
2255         mutex_lock(&local->key_mtx);
2256         list_for_each_entry(key, &sdata->key_list, list)
2257                 key->flags |= KEY_FLAG_TAINTED;
2258         mutex_unlock(&local->key_mtx);
2259 }
2260 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2261
2262 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2263 {
2264         struct ieee80211_local *local = sdata->local;
2265         struct ieee80211_chanctx_conf *chanctx_conf;
2266         struct ieee80211_chanctx *chanctx;
2267
2268         mutex_lock(&local->chanctx_mtx);
2269
2270         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2271                                         lockdep_is_held(&local->chanctx_mtx));
2272
2273         /*
2274          * This function can be called from a work, thus it may be possible
2275          * that the chanctx_conf is removed (due to a disconnection, for
2276          * example).
2277          * So nothing should be done in such case.
2278          */
2279         if (!chanctx_conf)
2280                 goto unlock;
2281
2282         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2283         ieee80211_recalc_smps_chanctx(local, chanctx);
2284  unlock:
2285         mutex_unlock(&local->chanctx_mtx);
2286 }
2287
2288 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2289 {
2290         struct ieee80211_local *local = sdata->local;
2291         struct ieee80211_chanctx_conf *chanctx_conf;
2292         struct ieee80211_chanctx *chanctx;
2293
2294         mutex_lock(&local->chanctx_mtx);
2295
2296         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2297                                         lockdep_is_held(&local->chanctx_mtx));
2298
2299         if (WARN_ON_ONCE(!chanctx_conf))
2300                 goto unlock;
2301
2302         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2303         ieee80211_recalc_chanctx_min_def(local, chanctx);
2304  unlock:
2305         mutex_unlock(&local->chanctx_mtx);
2306 }
2307
2308 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2309 {
2310         size_t pos = offset;
2311
2312         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2313                 pos += 2 + ies[pos + 1];
2314
2315         return pos;
2316 }
2317
2318 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2319                                             int rssi_min_thold,
2320                                             int rssi_max_thold)
2321 {
2322         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2323
2324         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2325                 return;
2326
2327         /*
2328          * Scale up threshold values before storing it, as the RSSI averaging
2329          * algorithm uses a scaled up value as well. Change this scaling
2330          * factor if the RSSI averaging algorithm changes.
2331          */
2332         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2333         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2334 }
2335
2336 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2337                                     int rssi_min_thold,
2338                                     int rssi_max_thold)
2339 {
2340         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2341
2342         WARN_ON(rssi_min_thold == rssi_max_thold ||
2343                 rssi_min_thold > rssi_max_thold);
2344
2345         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2346                                        rssi_max_thold);
2347 }
2348 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2349
2350 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2351 {
2352         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2353
2354         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2355 }
2356 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2357
2358 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2359                               u16 cap)
2360 {
2361         __le16 tmp;
2362
2363         *pos++ = WLAN_EID_HT_CAPABILITY;
2364         *pos++ = sizeof(struct ieee80211_ht_cap);
2365         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2366
2367         /* capability flags */
2368         tmp = cpu_to_le16(cap);
2369         memcpy(pos, &tmp, sizeof(u16));
2370         pos += sizeof(u16);
2371
2372         /* AMPDU parameters */
2373         *pos++ = ht_cap->ampdu_factor |
2374                  (ht_cap->ampdu_density <<
2375                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2376
2377         /* MCS set */
2378         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2379         pos += sizeof(ht_cap->mcs);
2380
2381         /* extended capabilities */
2382         pos += sizeof(__le16);
2383
2384         /* BF capabilities */
2385         pos += sizeof(__le32);
2386
2387         /* antenna selection */
2388         pos += sizeof(u8);
2389
2390         return pos;
2391 }
2392
2393 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2394                                u32 cap)
2395 {
2396         __le32 tmp;
2397
2398         *pos++ = WLAN_EID_VHT_CAPABILITY;
2399         *pos++ = sizeof(struct ieee80211_vht_cap);
2400         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2401
2402         /* capability flags */
2403         tmp = cpu_to_le32(cap);
2404         memcpy(pos, &tmp, sizeof(u32));
2405         pos += sizeof(u32);
2406
2407         /* VHT MCS set */
2408         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2409         pos += sizeof(vht_cap->vht_mcs);
2410
2411         return pos;
2412 }
2413
2414 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2415                                const struct cfg80211_chan_def *chandef,
2416                                u16 prot_mode, bool rifs_mode)
2417 {
2418         struct ieee80211_ht_operation *ht_oper;
2419         /* Build HT Information */
2420         *pos++ = WLAN_EID_HT_OPERATION;
2421         *pos++ = sizeof(struct ieee80211_ht_operation);
2422         ht_oper = (struct ieee80211_ht_operation *)pos;
2423         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2424                                         chandef->chan->center_freq);
2425         switch (chandef->width) {
2426         case NL80211_CHAN_WIDTH_160:
2427         case NL80211_CHAN_WIDTH_80P80:
2428         case NL80211_CHAN_WIDTH_80:
2429         case NL80211_CHAN_WIDTH_40:
2430                 if (chandef->center_freq1 > chandef->chan->center_freq)
2431                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2432                 else
2433                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2434                 break;
2435         default:
2436                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2437                 break;
2438         }
2439         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2440             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2441             chandef->width != NL80211_CHAN_WIDTH_20)
2442                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2443
2444         if (rifs_mode)
2445                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2446
2447         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2448         ht_oper->stbc_param = 0x0000;
2449
2450         /* It seems that Basic MCS set and Supported MCS set
2451            are identical for the first 10 bytes */
2452         memset(&ht_oper->basic_set, 0, 16);
2453         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2454
2455         return pos + sizeof(struct ieee80211_ht_operation);
2456 }
2457
2458 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2459                                    const struct cfg80211_chan_def *chandef)
2460 {
2461         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2462         *pos++ = 3;                                     /* IE length */
2463         /* New channel width */
2464         switch (chandef->width) {
2465         case NL80211_CHAN_WIDTH_80:
2466                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2467                 break;
2468         case NL80211_CHAN_WIDTH_160:
2469                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2470                 break;
2471         case NL80211_CHAN_WIDTH_80P80:
2472                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2473                 break;
2474         default:
2475                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2476         }
2477
2478         /* new center frequency segment 0 */
2479         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2480         /* new center frequency segment 1 */
2481         if (chandef->center_freq2)
2482                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2483         else
2484                 *pos++ = 0;
2485 }
2486
2487 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2488                                 const struct cfg80211_chan_def *chandef)
2489 {
2490         struct ieee80211_vht_operation *vht_oper;
2491
2492         *pos++ = WLAN_EID_VHT_OPERATION;
2493         *pos++ = sizeof(struct ieee80211_vht_operation);
2494         vht_oper = (struct ieee80211_vht_operation *)pos;
2495         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2496                                                         chandef->center_freq1);
2497         if (chandef->center_freq2)
2498                 vht_oper->center_freq_seg1_idx =
2499                         ieee80211_frequency_to_channel(chandef->center_freq2);
2500         else
2501                 vht_oper->center_freq_seg1_idx = 0x00;
2502
2503         switch (chandef->width) {
2504         case NL80211_CHAN_WIDTH_160:
2505                 /*
2506                  * Convert 160 MHz channel width to new style as interop
2507                  * workaround.
2508                  */
2509                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2510                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2511                 if (chandef->chan->center_freq < chandef->center_freq1)
2512                         vht_oper->center_freq_seg0_idx -= 8;
2513                 else
2514                         vht_oper->center_freq_seg0_idx += 8;
2515                 break;
2516         case NL80211_CHAN_WIDTH_80P80:
2517                 /*
2518                  * Convert 80+80 MHz channel width to new style as interop
2519                  * workaround.
2520                  */
2521                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2522                 break;
2523         case NL80211_CHAN_WIDTH_80:
2524                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2525                 break;
2526         default:
2527                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2528                 break;
2529         }
2530
2531         /* don't require special VHT peer rates */
2532         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2533
2534         return pos + sizeof(struct ieee80211_vht_operation);
2535 }
2536
2537 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2538                                struct cfg80211_chan_def *chandef)
2539 {
2540         enum nl80211_channel_type channel_type;
2541
2542         if (!ht_oper)
2543                 return false;
2544
2545         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2546         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2547                 channel_type = NL80211_CHAN_HT20;
2548                 break;
2549         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2550                 channel_type = NL80211_CHAN_HT40PLUS;
2551                 break;
2552         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2553                 channel_type = NL80211_CHAN_HT40MINUS;
2554                 break;
2555         default:
2556                 channel_type = NL80211_CHAN_NO_HT;
2557                 return false;
2558         }
2559
2560         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2561         return true;
2562 }
2563
2564 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2565                                 struct cfg80211_chan_def *chandef)
2566 {
2567         struct cfg80211_chan_def new = *chandef;
2568         int cf1, cf2;
2569
2570         if (!oper)
2571                 return false;
2572
2573         cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2574                                              chandef->chan->band);
2575         cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2576                                              chandef->chan->band);
2577
2578         switch (oper->chan_width) {
2579         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2580                 break;
2581         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2582                 new.width = NL80211_CHAN_WIDTH_80;
2583                 new.center_freq1 = cf1;
2584                 /* If needed, adjust based on the newer interop workaround. */
2585                 if (oper->center_freq_seg1_idx) {
2586                         unsigned int diff;
2587
2588                         diff = abs(oper->center_freq_seg1_idx -
2589                                    oper->center_freq_seg0_idx);
2590                         if (diff == 8) {
2591                                 new.width = NL80211_CHAN_WIDTH_160;
2592                                 new.center_freq1 = cf2;
2593                         } else if (diff > 8) {
2594                                 new.width = NL80211_CHAN_WIDTH_80P80;
2595                                 new.center_freq2 = cf2;
2596                         }
2597                 }
2598                 break;
2599         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2600                 new.width = NL80211_CHAN_WIDTH_160;
2601                 new.center_freq1 = cf1;
2602                 break;
2603         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2604                 new.width = NL80211_CHAN_WIDTH_80P80;
2605                 new.center_freq1 = cf1;
2606                 new.center_freq2 = cf2;
2607                 break;
2608         default:
2609                 return false;
2610         }
2611
2612         if (!cfg80211_chandef_valid(&new))
2613                 return false;
2614
2615         *chandef = new;
2616         return true;
2617 }
2618
2619 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2620                              const struct ieee80211_supported_band *sband,
2621                              const u8 *srates, int srates_len, u32 *rates)
2622 {
2623         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2624         int shift = ieee80211_chandef_get_shift(chandef);
2625         struct ieee80211_rate *br;
2626         int brate, rate, i, j, count = 0;
2627
2628         *rates = 0;
2629
2630         for (i = 0; i < srates_len; i++) {
2631                 rate = srates[i] & 0x7f;
2632
2633                 for (j = 0; j < sband->n_bitrates; j++) {
2634                         br = &sband->bitrates[j];
2635                         if ((rate_flags & br->flags) != rate_flags)
2636                                 continue;
2637
2638                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2639                         if (brate == rate) {
2640                                 *rates |= BIT(j);
2641                                 count++;
2642                                 break;
2643                         }
2644                 }
2645         }
2646         return count;
2647 }
2648
2649 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2650                             struct sk_buff *skb, bool need_basic,
2651                             enum nl80211_band band)
2652 {
2653         struct ieee80211_local *local = sdata->local;
2654         struct ieee80211_supported_band *sband;
2655         int rate, shift;
2656         u8 i, rates, *pos;
2657         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2658         u32 rate_flags;
2659
2660         shift = ieee80211_vif_get_shift(&sdata->vif);
2661         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2662         sband = local->hw.wiphy->bands[band];
2663         rates = 0;
2664         for (i = 0; i < sband->n_bitrates; i++) {
2665                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2666                         continue;
2667                 rates++;
2668         }
2669         if (rates > 8)
2670                 rates = 8;
2671
2672         if (skb_tailroom(skb) < rates + 2)
2673                 return -ENOMEM;
2674
2675         pos = skb_put(skb, rates + 2);
2676         *pos++ = WLAN_EID_SUPP_RATES;
2677         *pos++ = rates;
2678         for (i = 0; i < rates; i++) {
2679                 u8 basic = 0;
2680                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2681                         continue;
2682
2683                 if (need_basic && basic_rates & BIT(i))
2684                         basic = 0x80;
2685                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2686                                     5 * (1 << shift));
2687                 *pos++ = basic | (u8) rate;
2688         }
2689
2690         return 0;
2691 }
2692
2693 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2694                                 struct sk_buff *skb, bool need_basic,
2695                                 enum nl80211_band band)
2696 {
2697         struct ieee80211_local *local = sdata->local;
2698         struct ieee80211_supported_band *sband;
2699         int rate, shift;
2700         u8 i, exrates, *pos;
2701         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2702         u32 rate_flags;
2703
2704         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2705         shift = ieee80211_vif_get_shift(&sdata->vif);
2706
2707         sband = local->hw.wiphy->bands[band];
2708         exrates = 0;
2709         for (i = 0; i < sband->n_bitrates; i++) {
2710                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2711                         continue;
2712                 exrates++;
2713         }
2714
2715         if (exrates > 8)
2716                 exrates -= 8;
2717         else
2718                 exrates = 0;
2719
2720         if (skb_tailroom(skb) < exrates + 2)
2721                 return -ENOMEM;
2722
2723         if (exrates) {
2724                 pos = skb_put(skb, exrates + 2);
2725                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2726                 *pos++ = exrates;
2727                 for (i = 8; i < sband->n_bitrates; i++) {
2728                         u8 basic = 0;
2729                         if ((rate_flags & sband->bitrates[i].flags)
2730                             != rate_flags)
2731                                 continue;
2732                         if (need_basic && basic_rates & BIT(i))
2733                                 basic = 0x80;
2734                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2735                                             5 * (1 << shift));
2736                         *pos++ = basic | (u8) rate;
2737                 }
2738         }
2739         return 0;
2740 }
2741
2742 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2743 {
2744         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2745         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2746
2747         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2748                 /* non-managed type inferfaces */
2749                 return 0;
2750         }
2751         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2752 }
2753 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2754
2755 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2756 {
2757         if (!mcs)
2758                 return 1;
2759
2760         /* TODO: consider rx_highest */
2761
2762         if (mcs->rx_mask[3])
2763                 return 4;
2764         if (mcs->rx_mask[2])
2765                 return 3;
2766         if (mcs->rx_mask[1])
2767                 return 2;
2768         return 1;
2769 }
2770
2771 /**
2772  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2773  * @local: mac80211 hw info struct
2774  * @status: RX status
2775  * @mpdu_len: total MPDU length (including FCS)
2776  * @mpdu_offset: offset into MPDU to calculate timestamp at
2777  *
2778  * This function calculates the RX timestamp at the given MPDU offset, taking
2779  * into account what the RX timestamp was. An offset of 0 will just normalize
2780  * the timestamp to TSF at beginning of MPDU reception.
2781  */
2782 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2783                                      struct ieee80211_rx_status *status,
2784                                      unsigned int mpdu_len,
2785                                      unsigned int mpdu_offset)
2786 {
2787         u64 ts = status->mactime;
2788         struct rate_info ri;
2789         u16 rate;
2790
2791         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2792                 return 0;
2793
2794         memset(&ri, 0, sizeof(ri));
2795
2796         /* Fill cfg80211 rate info */
2797         switch (status->encoding) {
2798         case RX_ENC_HT:
2799                 ri.mcs = status->rate_idx;
2800                 ri.flags |= RATE_INFO_FLAGS_MCS;
2801                 ri.bw = status->bw;
2802                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2803                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2804                 break;
2805         case RX_ENC_VHT:
2806                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2807                 ri.mcs = status->rate_idx;
2808                 ri.nss = status->nss;
2809                 ri.bw = status->bw;
2810                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
2811                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2812                 break;
2813         default:
2814                 WARN_ON(1);
2815                 /* fall through */
2816         case RX_ENC_LEGACY: {
2817                 struct ieee80211_supported_band *sband;
2818                 int shift = 0;
2819                 int bitrate;
2820
2821                 ri.bw = status->bw;
2822
2823                 switch (status->bw) {
2824                 case RATE_INFO_BW_10:
2825                         shift = 1;
2826                         break;
2827                 case RATE_INFO_BW_5:
2828                         shift = 2;
2829                         break;
2830                 }
2831
2832                 sband = local->hw.wiphy->bands[status->band];
2833                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2834                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2835
2836                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
2837                         /* TODO: handle HT/VHT preambles */
2838                         if (status->band == NL80211_BAND_5GHZ) {
2839                                 ts += 20 << shift;
2840                                 mpdu_offset += 2;
2841                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
2842                                 ts += 96;
2843                         } else {
2844                                 ts += 192;
2845                         }
2846                 }
2847                 break;
2848                 }
2849         }
2850
2851         rate = cfg80211_calculate_bitrate(&ri);
2852         if (WARN_ONCE(!rate,
2853                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
2854                       (unsigned long long)status->flag, status->rate_idx,
2855                       status->nss))
2856                 return 0;
2857
2858         /* rewind from end of MPDU */
2859         if (status->flag & RX_FLAG_MACTIME_END)
2860                 ts -= mpdu_len * 8 * 10 / rate;
2861
2862         ts += mpdu_offset * 8 * 10 / rate;
2863
2864         return ts;
2865 }
2866
2867 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2868 {
2869         struct ieee80211_sub_if_data *sdata;
2870         struct cfg80211_chan_def chandef;
2871
2872         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
2873         ASSERT_RTNL();
2874
2875         mutex_lock(&local->mtx);
2876         list_for_each_entry(sdata, &local->interfaces, list) {
2877                 /* it might be waiting for the local->mtx, but then
2878                  * by the time it gets it, sdata->wdev.cac_started
2879                  * will no longer be true
2880                  */
2881                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2882
2883                 if (sdata->wdev.cac_started) {
2884                         chandef = sdata->vif.bss_conf.chandef;
2885                         ieee80211_vif_release_channel(sdata);
2886                         cfg80211_cac_event(sdata->dev,
2887                                            &chandef,
2888                                            NL80211_RADAR_CAC_ABORTED,
2889                                            GFP_KERNEL);
2890                 }
2891         }
2892         mutex_unlock(&local->mtx);
2893 }
2894
2895 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2896 {
2897         struct ieee80211_local *local =
2898                 container_of(work, struct ieee80211_local, radar_detected_work);
2899         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2900         struct ieee80211_chanctx *ctx;
2901         int num_chanctx = 0;
2902
2903         mutex_lock(&local->chanctx_mtx);
2904         list_for_each_entry(ctx, &local->chanctx_list, list) {
2905                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2906                         continue;
2907
2908                 num_chanctx++;
2909                 chandef = ctx->conf.def;
2910         }
2911         mutex_unlock(&local->chanctx_mtx);
2912
2913         rtnl_lock();
2914         ieee80211_dfs_cac_cancel(local);
2915         rtnl_unlock();
2916
2917         if (num_chanctx > 1)
2918                 /* XXX: multi-channel is not supported yet */
2919                 WARN_ON(1);
2920         else
2921                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2922 }
2923
2924 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2925 {
2926         struct ieee80211_local *local = hw_to_local(hw);
2927
2928         trace_api_radar_detected(local);
2929
2930         schedule_work(&local->radar_detected_work);
2931 }
2932 EXPORT_SYMBOL(ieee80211_radar_detected);
2933
2934 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2935 {
2936         u32 ret;
2937         int tmp;
2938
2939         switch (c->width) {
2940         case NL80211_CHAN_WIDTH_20:
2941                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2942                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2943                 break;
2944         case NL80211_CHAN_WIDTH_40:
2945                 c->width = NL80211_CHAN_WIDTH_20;
2946                 c->center_freq1 = c->chan->center_freq;
2947                 ret = IEEE80211_STA_DISABLE_40MHZ |
2948                       IEEE80211_STA_DISABLE_VHT;
2949                 break;
2950         case NL80211_CHAN_WIDTH_80:
2951                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2952                 /* n_P40 */
2953                 tmp /= 2;
2954                 /* freq_P40 */
2955                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2956                 c->width = NL80211_CHAN_WIDTH_40;
2957                 ret = IEEE80211_STA_DISABLE_VHT;
2958                 break;
2959         case NL80211_CHAN_WIDTH_80P80:
2960                 c->center_freq2 = 0;
2961                 c->width = NL80211_CHAN_WIDTH_80;
2962                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2963                       IEEE80211_STA_DISABLE_160MHZ;
2964                 break;
2965         case NL80211_CHAN_WIDTH_160:
2966                 /* n_P20 */
2967                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2968                 /* n_P80 */
2969                 tmp /= 4;
2970                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2971                 c->width = NL80211_CHAN_WIDTH_80;
2972                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2973                       IEEE80211_STA_DISABLE_160MHZ;
2974                 break;
2975         default:
2976         case NL80211_CHAN_WIDTH_20_NOHT:
2977                 WARN_ON_ONCE(1);
2978                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2979                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2980                 break;
2981         case NL80211_CHAN_WIDTH_5:
2982         case NL80211_CHAN_WIDTH_10:
2983                 WARN_ON_ONCE(1);
2984                 /* keep c->width */
2985                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2986                 break;
2987         }
2988
2989         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2990
2991         return ret;
2992 }
2993
2994 /*
2995  * Returns true if smps_mode_new is strictly more restrictive than
2996  * smps_mode_old.
2997  */
2998 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2999                                    enum ieee80211_smps_mode smps_mode_new)
3000 {
3001         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3002                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3003                 return false;
3004
3005         switch (smps_mode_old) {
3006         case IEEE80211_SMPS_STATIC:
3007                 return false;
3008         case IEEE80211_SMPS_DYNAMIC:
3009                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3010         case IEEE80211_SMPS_OFF:
3011                 return smps_mode_new != IEEE80211_SMPS_OFF;
3012         default:
3013                 WARN_ON(1);
3014         }
3015
3016         return false;
3017 }
3018
3019 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3020                               struct cfg80211_csa_settings *csa_settings)
3021 {
3022         struct sk_buff *skb;
3023         struct ieee80211_mgmt *mgmt;
3024         struct ieee80211_local *local = sdata->local;
3025         int freq;
3026         int hdr_len = offsetofend(struct ieee80211_mgmt,
3027                                   u.action.u.chan_switch);
3028         u8 *pos;
3029
3030         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3031             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3032                 return -EOPNOTSUPP;
3033
3034         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3035                             5 + /* channel switch announcement element */
3036                             3 + /* secondary channel offset element */
3037                             5 + /* wide bandwidth channel switch announcement */
3038                             8); /* mesh channel switch parameters element */
3039         if (!skb)
3040                 return -ENOMEM;
3041
3042         skb_reserve(skb, local->tx_headroom);
3043         mgmt = skb_put_zero(skb, hdr_len);
3044         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3045                                           IEEE80211_STYPE_ACTION);
3046
3047         eth_broadcast_addr(mgmt->da);
3048         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3049         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3050                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3051         } else {
3052                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3053                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3054         }
3055         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3056         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3057         pos = skb_put(skb, 5);
3058         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3059         *pos++ = 3;                                             /* IE length */
3060         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3061         freq = csa_settings->chandef.chan->center_freq;
3062         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3063         *pos++ = csa_settings->count;                           /* count */
3064
3065         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3066                 enum nl80211_channel_type ch_type;
3067
3068                 skb_put(skb, 3);
3069                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3070                 *pos++ = 1;                                     /* IE length */
3071                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3072                 if (ch_type == NL80211_CHAN_HT40PLUS)
3073                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3074                 else
3075                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3076         }
3077
3078         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3079                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3080
3081                 skb_put(skb, 8);
3082                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3083                 *pos++ = 6;                                     /* IE length */
3084                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3085                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3086                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3087                 *pos++ |= csa_settings->block_tx ?
3088                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3089                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3090                 pos += 2;
3091                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3092                 pos += 2;
3093         }
3094
3095         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3096             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3097             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3098                 skb_put(skb, 5);
3099                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3100         }
3101
3102         ieee80211_tx_skb(sdata, skb);
3103         return 0;
3104 }
3105
3106 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3107 {
3108         return !(cs == NULL || cs->cipher == 0 ||
3109                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3110                  cs->hdr_len <= cs->key_idx_off ||
3111                  cs->key_idx_shift > 7 ||
3112                  cs->key_idx_mask == 0);
3113 }
3114
3115 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3116 {
3117         int i;
3118
3119         /* Ensure we have enough iftype bitmap space for all iftype values */
3120         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3121
3122         for (i = 0; i < n; i++)
3123                 if (!ieee80211_cs_valid(&cs[i]))
3124                         return false;
3125
3126         return true;
3127 }
3128
3129 const struct ieee80211_cipher_scheme *
3130 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3131                  enum nl80211_iftype iftype)
3132 {
3133         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3134         int n = local->hw.n_cipher_schemes;
3135         int i;
3136         const struct ieee80211_cipher_scheme *cs = NULL;
3137
3138         for (i = 0; i < n; i++) {
3139                 if (l[i].cipher == cipher) {
3140                         cs = &l[i];
3141                         break;
3142                 }
3143         }
3144
3145         if (!cs || !(cs->iftype & BIT(iftype)))
3146                 return NULL;
3147
3148         return cs;
3149 }
3150
3151 int ieee80211_cs_headroom(struct ieee80211_local *local,
3152                           struct cfg80211_crypto_settings *crypto,
3153                           enum nl80211_iftype iftype)
3154 {
3155         const struct ieee80211_cipher_scheme *cs;
3156         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3157         int i;
3158
3159         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3160                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3161                                       iftype);
3162
3163                 if (cs && headroom < cs->hdr_len)
3164                         headroom = cs->hdr_len;
3165         }
3166
3167         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3168         if (cs && headroom < cs->hdr_len)
3169                 headroom = cs->hdr_len;
3170
3171         return headroom;
3172 }
3173
3174 static bool
3175 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3176 {
3177         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3178         int skip;
3179
3180         if (end > 0)
3181                 return false;
3182
3183         /* One shot NOA  */
3184         if (data->count[i] == 1)
3185                 return false;
3186
3187         if (data->desc[i].interval == 0)
3188                 return false;
3189
3190         /* End time is in the past, check for repetitions */
3191         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3192         if (data->count[i] < 255) {
3193                 if (data->count[i] <= skip) {
3194                         data->count[i] = 0;
3195                         return false;
3196                 }
3197
3198                 data->count[i] -= skip;
3199         }
3200
3201         data->desc[i].start += skip * data->desc[i].interval;
3202
3203         return true;
3204 }
3205
3206 static bool
3207 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3208                              s32 *offset)
3209 {
3210         bool ret = false;
3211         int i;
3212
3213         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3214                 s32 cur;
3215
3216                 if (!data->count[i])
3217                         continue;
3218
3219                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3220                         ret = true;
3221
3222                 cur = data->desc[i].start - tsf;
3223                 if (cur > *offset)
3224                         continue;
3225
3226                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3227                 if (cur > *offset)
3228                         *offset = cur;
3229         }
3230
3231         return ret;
3232 }
3233
3234 static u32
3235 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3236 {
3237         s32 offset = 0;
3238         int tries = 0;
3239         /*
3240          * arbitrary limit, used to avoid infinite loops when combined NoA
3241          * descriptors cover the full time period.
3242          */
3243         int max_tries = 5;
3244
3245         ieee80211_extend_absent_time(data, tsf, &offset);
3246         do {
3247                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3248                         break;
3249
3250                 tries++;
3251         } while (tries < max_tries);
3252
3253         return offset;
3254 }
3255
3256 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3257 {
3258         u32 next_offset = BIT(31) - 1;
3259         int i;
3260
3261         data->absent = 0;
3262         data->has_next_tsf = false;
3263         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3264                 s32 start;
3265
3266                 if (!data->count[i])
3267                         continue;
3268
3269                 ieee80211_extend_noa_desc(data, tsf, i);
3270                 start = data->desc[i].start - tsf;
3271                 if (start <= 0)
3272                         data->absent |= BIT(i);
3273
3274                 if (next_offset > start)
3275                         next_offset = start;
3276
3277                 data->has_next_tsf = true;
3278         }
3279
3280         if (data->absent)
3281                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3282
3283         data->next_tsf = tsf + next_offset;
3284 }
3285 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3286
3287 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3288                             struct ieee80211_noa_data *data, u32 tsf)
3289 {
3290         int ret = 0;
3291         int i;
3292
3293         memset(data, 0, sizeof(*data));
3294
3295         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3296                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3297
3298                 if (!desc->count || !desc->duration)
3299                         continue;
3300
3301                 data->count[i] = desc->count;
3302                 data->desc[i].start = le32_to_cpu(desc->start_time);
3303                 data->desc[i].duration = le32_to_cpu(desc->duration);
3304                 data->desc[i].interval = le32_to_cpu(desc->interval);
3305
3306                 if (data->count[i] > 1 &&
3307                     data->desc[i].interval < data->desc[i].duration)
3308                         continue;
3309
3310                 ieee80211_extend_noa_desc(data, tsf, i);
3311                 ret++;
3312         }
3313
3314         if (ret)
3315                 ieee80211_update_p2p_noa(data, tsf);
3316
3317         return ret;
3318 }
3319 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3320
3321 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3322                            struct ieee80211_sub_if_data *sdata)
3323 {
3324         u64 tsf = drv_get_tsf(local, sdata);
3325         u64 dtim_count = 0;
3326         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3327         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3328         struct ps_data *ps;
3329         u8 bcns_from_dtim;
3330
3331         if (tsf == -1ULL || !beacon_int || !dtim_period)
3332                 return;
3333
3334         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3335             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3336                 if (!sdata->bss)
3337                         return;
3338
3339                 ps = &sdata->bss->ps;
3340         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3341                 ps = &sdata->u.mesh.ps;
3342         } else {
3343                 return;
3344         }
3345
3346         /*
3347          * actually finds last dtim_count, mac80211 will update in
3348          * __beacon_add_tim().
3349          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3350          */
3351         do_div(tsf, beacon_int);
3352         bcns_from_dtim = do_div(tsf, dtim_period);
3353         /* just had a DTIM */
3354         if (!bcns_from_dtim)
3355                 dtim_count = 0;
3356         else
3357                 dtim_count = dtim_period - bcns_from_dtim;
3358
3359         ps->dtim_count = dtim_count;
3360 }
3361
3362 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3363                                          struct ieee80211_chanctx *ctx)
3364 {
3365         struct ieee80211_sub_if_data *sdata;
3366         u8 radar_detect = 0;
3367
3368         lockdep_assert_held(&local->chanctx_mtx);
3369
3370         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3371                 return 0;
3372
3373         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3374                 if (sdata->reserved_radar_required)
3375                         radar_detect |= BIT(sdata->reserved_chandef.width);
3376
3377         /*
3378          * An in-place reservation context should not have any assigned vifs
3379          * until it replaces the other context.
3380          */
3381         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3382                 !list_empty(&ctx->assigned_vifs));
3383
3384         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3385                 if (sdata->radar_required)
3386                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3387
3388         return radar_detect;
3389 }
3390
3391 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3392                                  const struct cfg80211_chan_def *chandef,
3393                                  enum ieee80211_chanctx_mode chanmode,
3394                                  u8 radar_detect)
3395 {
3396         struct ieee80211_local *local = sdata->local;
3397         struct ieee80211_sub_if_data *sdata_iter;
3398         enum nl80211_iftype iftype = sdata->wdev.iftype;
3399         struct ieee80211_chanctx *ctx;
3400         int total = 1;
3401         struct iface_combination_params params = {
3402                 .radar_detect = radar_detect,
3403         };
3404
3405         lockdep_assert_held(&local->chanctx_mtx);
3406
3407         if (WARN_ON(hweight32(radar_detect) > 1))
3408                 return -EINVAL;
3409
3410         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3411                     !chandef->chan))
3412                 return -EINVAL;
3413
3414         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3415                 return -EINVAL;
3416
3417         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3418             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3419                 /*
3420                  * always passing this is harmless, since it'll be the
3421                  * same value that cfg80211 finds if it finds the same
3422                  * interface ... and that's always allowed
3423                  */
3424                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3425         }
3426
3427         /* Always allow software iftypes */
3428         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3429                 if (radar_detect)
3430                         return -EINVAL;
3431                 return 0;
3432         }
3433
3434         if (chandef)
3435                 params.num_different_channels = 1;
3436
3437         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3438                 params.iftype_num[iftype] = 1;
3439
3440         list_for_each_entry(ctx, &local->chanctx_list, list) {
3441                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3442                         continue;
3443                 params.radar_detect |=
3444                         ieee80211_chanctx_radar_detect(local, ctx);
3445                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3446                         params.num_different_channels++;
3447                         continue;
3448                 }
3449                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3450                     cfg80211_chandef_compatible(chandef,
3451                                                 &ctx->conf.def))
3452                         continue;
3453                 params.num_different_channels++;
3454         }
3455
3456         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3457                 struct wireless_dev *wdev_iter;
3458
3459                 wdev_iter = &sdata_iter->wdev;
3460
3461                 if (sdata_iter == sdata ||
3462                     !ieee80211_sdata_running(sdata_iter) ||
3463                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3464                         continue;
3465
3466                 params.iftype_num[wdev_iter->iftype]++;
3467                 total++;
3468         }
3469
3470         if (total == 1 && !params.radar_detect)
3471                 return 0;
3472
3473         return cfg80211_check_combinations(local->hw.wiphy, &params);
3474 }
3475
3476 static void
3477 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3478                          void *data)
3479 {
3480         u32 *max_num_different_channels = data;
3481
3482         *max_num_different_channels = max(*max_num_different_channels,
3483                                           c->num_different_channels);
3484 }
3485
3486 int ieee80211_max_num_channels(struct ieee80211_local *local)
3487 {
3488         struct ieee80211_sub_if_data *sdata;
3489         struct ieee80211_chanctx *ctx;
3490         u32 max_num_different_channels = 1;
3491         int err;
3492         struct iface_combination_params params = {0};
3493
3494         lockdep_assert_held(&local->chanctx_mtx);
3495
3496         list_for_each_entry(ctx, &local->chanctx_list, list) {
3497                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3498                         continue;
3499
3500                 params.num_different_channels++;
3501
3502                 params.radar_detect |=
3503                         ieee80211_chanctx_radar_detect(local, ctx);
3504         }
3505
3506         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3507                 params.iftype_num[sdata->wdev.iftype]++;
3508
3509         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3510                                          ieee80211_iter_max_chans,
3511                                          &max_num_different_channels);
3512         if (err < 0)
3513                 return err;
3514
3515         return max_num_different_channels;
3516 }
3517
3518 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3519 {
3520         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3521         *buf++ = 7; /* len */
3522         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3523         *buf++ = 0x50;
3524         *buf++ = 0xf2;
3525         *buf++ = 2; /* WME */
3526         *buf++ = 0; /* WME info */
3527         *buf++ = 1; /* WME ver */
3528         *buf++ = qosinfo; /* U-APSD no in use */
3529
3530         return buf;
3531 }
3532
3533 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3534                              unsigned long *frame_cnt,
3535                              unsigned long *byte_cnt)
3536 {
3537         struct txq_info *txqi = to_txq_info(txq);
3538         u32 frag_cnt = 0, frag_bytes = 0;
3539         struct sk_buff *skb;
3540
3541         skb_queue_walk(&txqi->frags, skb) {
3542                 frag_cnt++;
3543                 frag_bytes += skb->len;
3544         }
3545
3546         if (frame_cnt)
3547                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3548
3549         if (byte_cnt)
3550                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3551 }
3552 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3553
3554 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3555         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3556         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3557         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3558         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3559 };