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  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42         BUG_ON(!wiphy);
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  50                         enum nl80211_iftype type)
  51 {
  52         __le16 fc = hdr->frame_control;
  53
  54          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
  55         if (len < 16)
  56                 return NULL;
  57
  58         if (ieee80211_is_data(fc)) {
  59                 if (len < 24) /* drop incorrect hdr len (data) */
  60                         return NULL;
  61
  62                 if (ieee80211_has_a4(fc))
  63                         return NULL;
  64                 if (ieee80211_has_tods(fc))
  65                         return hdr->addr1;
  66                 if (ieee80211_has_fromds(fc))
  67                         return hdr->addr2;
  68
  69                 return hdr->addr3;
  70         }
  71
  72         if (ieee80211_is_mgmt(fc)) {
  73                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  74                         return NULL;
  75                 return hdr->addr3;
  76         }
  77
  78         if (ieee80211_is_ctl(fc)) {
  79                 if (ieee80211_is_pspoll(fc))
  80                         return hdr->addr1;
  81
  82                 if (ieee80211_is_back_req(fc)) {
  83                         switch (type) {
  84                         case NL80211_IFTYPE_STATION:
  85                                 return hdr->addr2;
  86                         case NL80211_IFTYPE_AP:
  87                         case NL80211_IFTYPE_AP_VLAN:
  88                                 return hdr->addr1;
  89                         default:
  90                                 break; /* fall through to the return */
  91                         }
  92                 }
  93         }
  94
  95         return NULL;
  96 }
  97
  98 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  99 {
 100         struct sk_buff *skb;
 101         struct ieee80211_hdr *hdr;
 102
 103         skb_queue_walk(&tx->skbs, skb) {
 104                 hdr = (struct ieee80211_hdr *) skb->data;
 105                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 106         }
 107 }
 108
 109 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
 110                              int rate, int erp, int short_preamble,
 111                              int shift)
 112 {
 113         int dur;
 114
 115         /* calculate duration (in microseconds, rounded up to next higher
 116          * integer if it includes a fractional microsecond) to send frame of
 117          * len bytes (does not include FCS) at the given rate. Duration will
 118          * also include SIFS.
 119          *
 120          * rate is in 100 kbps, so divident is multiplied by 10 in the
 121          * DIV_ROUND_UP() operations.
 122          *
 123          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 124          * is assumed to be 0 otherwise.
 125          */
 126
 127         if (band == IEEE80211_BAND_5GHZ || erp) {
 128                 /*
 129                  * OFDM:
 130                  *
 131                  * N_DBPS = DATARATE x 4
 132                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 133                  *      (16 = SIGNAL time, 6 = tail bits)
 134                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 135                  *
 136                  * T_SYM = 4 usec
 137                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 138                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 139                  *      signal ext = 6 usec
 140                  */
 141                 dur = 16; /* SIFS + signal ext */
 142                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 143                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 144
 145                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 146                  *  * times 4 for 5 MHz
 147                  *  * times 2 for 10 MHz
 148                  */
 149                 dur *= 1 << shift;
 150
 151                 /* rates should already consider the channel bandwidth,
 152                  * don't apply divisor again.
 153                  */
 154                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 155                                         4 * rate); /* T_SYM x N_SYM */
 156         } else {
 157                 /*
 158                  * 802.11b or 802.11g with 802.11b compatibility:
 159                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 160                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 161                  *
 162                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 163                  * aSIFSTime = 10 usec
 164                  * aPreambleLength = 144 usec or 72 usec with short preamble
 165                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 166                  */
 167                 dur = 10; /* aSIFSTime = 10 usec */
 168                 dur += short_preamble ? (72 + 24) : (144 + 48);
 169
 170                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 171         }
 172
 173         return dur;
 174 }
 175
 176 /* Exported duration function for driver use */
 177 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 178                                         struct ieee80211_vif *vif,
 179                                         enum ieee80211_band band,
 180                                         size_t frame_len,
 181                                         struct ieee80211_rate *rate)
 182 {
 183         struct ieee80211_sub_if_data *sdata;
 184         u16 dur;
 185         int erp, shift = 0;
 186         bool short_preamble = false;
 187
 188         erp = 0;
 189         if (vif) {
 190                 sdata = vif_to_sdata(vif);
 191                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 192                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 193                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 194                 shift = ieee80211_vif_get_shift(vif);
 195         }
 196
 197         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 198                                        short_preamble, shift);
 199
 200         return cpu_to_le16(dur);
 201 }
 202 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 203
 204 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 205                               struct ieee80211_vif *vif, size_t frame_len,
 206                               const struct ieee80211_tx_info *frame_txctl)
 207 {
 208         struct ieee80211_local *local = hw_to_local(hw);
 209         struct ieee80211_rate *rate;
 210         struct ieee80211_sub_if_data *sdata;
 211         bool short_preamble;
 212         int erp, shift = 0, bitrate;
 213         u16 dur;
 214         struct ieee80211_supported_band *sband;
 215
 216         sband = local->hw.wiphy->bands[frame_txctl->band];
 217
 218         short_preamble = false;
 219
 220         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 221
 222         erp = 0;
 223         if (vif) {
 224                 sdata = vif_to_sdata(vif);
 225                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 226                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 227                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 228                 shift = ieee80211_vif_get_shift(vif);
 229         }
 230
 231         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 232
 233         /* CTS duration */
 234         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 235                                        erp, short_preamble, shift);
 236         /* Data frame duration */
 237         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 238                                         erp, short_preamble, shift);
 239         /* ACK duration */
 240         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 241                                         erp, short_preamble, shift);
 242
 243         return cpu_to_le16(dur);
 244 }
 245 EXPORT_SYMBOL(ieee80211_rts_duration);
 246
 247 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 248                                     struct ieee80211_vif *vif,
 249                                     size_t frame_len,
 250                                     const struct ieee80211_tx_info *frame_txctl)
 251 {
 252         struct ieee80211_local *local = hw_to_local(hw);
 253         struct ieee80211_rate *rate;
 254         struct ieee80211_sub_if_data *sdata;
 255         bool short_preamble;
 256         int erp, shift = 0, bitrate;
 257         u16 dur;
 258         struct ieee80211_supported_band *sband;
 259
 260         sband = local->hw.wiphy->bands[frame_txctl->band];
 261
 262         short_preamble = false;
 263
 264         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 265         erp = 0;
 266         if (vif) {
 267                 sdata = vif_to_sdata(vif);
 268                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 269                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 270                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 271                 shift = ieee80211_vif_get_shift(vif);
 272         }
 273
 274         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 275
 276         /* Data frame duration */
 277         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 278                                        erp, short_preamble, shift);
 279         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 280                 /* ACK duration */
 281                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 282                                                 erp, short_preamble, shift);
 283         }
 284
 285         return cpu_to_le16(dur);
 286 }
 287 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 288
 289 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 290 {
 291         struct ieee80211_sub_if_data *sdata;
 292         int n_acs = IEEE80211_NUM_ACS;
 293
 294         if (local->hw.queues < IEEE80211_NUM_ACS)
 295                 n_acs = 1;
 296
 297         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 298                 int ac;
 299
 300                 if (!sdata->dev)
 301                         continue;
 302
 303                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 304                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 305                         continue;
 306
 307                 for (ac = 0; ac < n_acs; ac++) {
 308                         int ac_queue = sdata->vif.hw_queue[ac];
 309
 310                         if (ac_queue == queue ||
 311                             (sdata->vif.cab_queue == queue &&
 312                              local->queue_stop_reasons[ac_queue] == 0 &&
 313                              skb_queue_empty(&local->pending[ac_queue])))
 314                                 netif_wake_subqueue(sdata->dev, ac);
 315                 }
 316         }
 317 }
 318
 319 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 320                                    enum queue_stop_reason reason,
 321                                    bool refcounted)
 322 {
 323         struct ieee80211_local *local = hw_to_local(hw);
 324
 325         trace_wake_queue(local, queue, reason);
 326
 327         if (WARN_ON(queue >= hw->queues))
 328                 return;
 329
 330         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 331                 return;
 332
 333         if (!refcounted)
 334                 local->q_stop_reasons[queue][reason] = 0;
 335         else
 336                 local->q_stop_reasons[queue][reason]--;
 337
 338         if (local->q_stop_reasons[queue][reason] == 0)
 339                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 340
 341         if (local->queue_stop_reasons[queue] != 0)
 342                 /* someone still has this queue stopped */
 343                 return;
 344
 345         if (skb_queue_empty(&local->pending[queue])) {
 346                 rcu_read_lock();
 347                 ieee80211_propagate_queue_wake(local, queue);
 348                 rcu_read_unlock();
 349         } else
 350                 tasklet_schedule(&local->tx_pending_tasklet);
 351 }
 352
 353 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 354                                     enum queue_stop_reason reason,
 355                                     bool refcounted)
 356 {
 357         struct ieee80211_local *local = hw_to_local(hw);
 358         unsigned long flags;
 359
 360         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 361         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 362         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 363 }
 364
 365 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 366 {
 367         ieee80211_wake_queue_by_reason(hw, queue,
 368                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 369                                        false);
 370 }
 371 EXPORT_SYMBOL(ieee80211_wake_queue);
 372
 373 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 374                                    enum queue_stop_reason reason,
 375                                    bool refcounted)
 376 {
 377         struct ieee80211_local *local = hw_to_local(hw);
 378         struct ieee80211_sub_if_data *sdata;
 379         int n_acs = IEEE80211_NUM_ACS;
 380
 381         trace_stop_queue(local, queue, reason);
 382
 383         if (WARN_ON(queue >= hw->queues))
 384                 return;
 385
 386         if (!refcounted)
 387                 local->q_stop_reasons[queue][reason] = 1;
 388         else
 389                 local->q_stop_reasons[queue][reason]++;
 390
 391         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 392                 return;
 393
 394         if (local->hw.queues < IEEE80211_NUM_ACS)
 395                 n_acs = 1;
 396
 397         rcu_read_lock();
 398         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 399                 int ac;
 400
 401                 if (!sdata->dev)
 402                         continue;
 403
 404                 for (ac = 0; ac < n_acs; ac++) {
 405                         if (sdata->vif.hw_queue[ac] == queue ||
 406                             sdata->vif.cab_queue == queue)
 407                                 netif_stop_subqueue(sdata->dev, ac);
 408                 }
 409         }
 410         rcu_read_unlock();
 411 }
 412
 413 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 414                                     enum queue_stop_reason reason,
 415                                     bool refcounted)
 416 {
 417         struct ieee80211_local *local = hw_to_local(hw);
 418         unsigned long flags;
 419
 420         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 421         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 422         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 423 }
 424
 425 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 426 {
 427         ieee80211_stop_queue_by_reason(hw, queue,
 428                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 429                                        false);
 430 }
 431 EXPORT_SYMBOL(ieee80211_stop_queue);
 432
 433 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 434                                struct sk_buff *skb)
 435 {
 436         struct ieee80211_hw *hw = &local->hw;
 437         unsigned long flags;
 438         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 439         int queue = info->hw_queue;
 440
 441         if (WARN_ON(!info->control.vif)) {
 442                 ieee80211_free_txskb(&local->hw, skb);
 443                 return;
 444         }
 445
 446         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 447         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 448                                false);
 449         __skb_queue_tail(&local->pending[queue], skb);
 450         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 451                                false);
 452         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 453 }
 454
 455 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 456                                 struct sk_buff_head *skbs)
 457 {
 458         struct ieee80211_hw *hw = &local->hw;
 459         struct sk_buff *skb;
 460         unsigned long flags;
 461         int queue, i;
 462
 463         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 464         while ((skb = skb_dequeue(skbs))) {
 465                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 466
 467                 if (WARN_ON(!info->control.vif)) {
 468                         ieee80211_free_txskb(&local->hw, skb);
 469                         continue;
 470                 }
 471
 472                 queue = info->hw_queue;
 473
 474                 __ieee80211_stop_queue(hw, queue,
 475                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 476                                 false);
 477
 478                 __skb_queue_tail(&local->pending[queue], skb);
 479         }
 480
 481         for (i = 0; i < hw->queues; i++)
 482                 __ieee80211_wake_queue(hw, i,
 483                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 484                         false);
 485         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 486 }
 487
 488 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 489                                      unsigned long queues,
 490                                      enum queue_stop_reason reason,
 491                                      bool refcounted)
 492 {
 493         struct ieee80211_local *local = hw_to_local(hw);
 494         unsigned long flags;
 495         int i;
 496
 497         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 498
 499         for_each_set_bit(i, &queues, hw->queues)
 500                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 501
 502         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 503 }
 504
 505 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 506 {
 507         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 508                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 509                                         false);
 510 }
 511 EXPORT_SYMBOL(ieee80211_stop_queues);
 512
 513 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 514 {
 515         struct ieee80211_local *local = hw_to_local(hw);
 516         unsigned long flags;
 517         int ret;
 518
 519         if (WARN_ON(queue >= hw->queues))
 520                 return true;
 521
 522         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 523         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 524                        &local->queue_stop_reasons[queue]);
 525         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 526         return ret;
 527 }
 528 EXPORT_SYMBOL(ieee80211_queue_stopped);
 529
 530 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 531                                      unsigned long queues,
 532                                      enum queue_stop_reason reason,
 533                                      bool refcounted)
 534 {
 535         struct ieee80211_local *local = hw_to_local(hw);
 536         unsigned long flags;
 537         int i;
 538
 539         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 540
 541         for_each_set_bit(i, &queues, hw->queues)
 542                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 543
 544         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 545 }
 546
 547 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 548 {
 549         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 550                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 551                                         false);
 552 }
 553 EXPORT_SYMBOL(ieee80211_wake_queues);
 554
 555 static unsigned int
 556 ieee80211_get_vif_queues(struct ieee80211_local *local,
 557                          struct ieee80211_sub_if_data *sdata)
 558 {
 559         unsigned int queues;
 560
 561         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 562                 int ac;
 563
 564                 queues = 0;
 565
 566                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 567                         queues |= BIT(sdata->vif.hw_queue[ac]);
 568                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 569                         queues |= BIT(sdata->vif.cab_queue);
 570         } else {
 571                 /* all queues */
 572                 queues = BIT(local->hw.queues) - 1;
 573         }
 574
 575         return queues;
 576 }
 577
 578 void ieee80211_flush_queues(struct ieee80211_local *local,
 579                             struct ieee80211_sub_if_data *sdata)
 580 {
 581         unsigned int queues;
 582
 583         if (!local->ops->flush)
 584                 return;
 585
 586         queues = ieee80211_get_vif_queues(local, sdata);
 587
 588         ieee80211_stop_queues_by_reason(&local->hw, queues,
 589                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 590                                         false);
 591
 592         drv_flush(local, sdata, queues, false);
 593
 594         ieee80211_wake_queues_by_reason(&local->hw, queues,
 595                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 596                                         false);
 597 }
 598
 599 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 600                                struct ieee80211_sub_if_data *sdata,
 601                                enum queue_stop_reason reason)
 602 {
 603         ieee80211_stop_queues_by_reason(&local->hw,
 604                                         ieee80211_get_vif_queues(local, sdata),
 605                                         reason, true);
 606 }
 607
 608 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 609                                struct ieee80211_sub_if_data *sdata,
 610                                enum queue_stop_reason reason)
 611 {
 612         ieee80211_wake_queues_by_reason(&local->hw,
 613                                         ieee80211_get_vif_queues(local, sdata),
 614                                         reason, true);
 615 }
 616
 617 static void __iterate_active_interfaces(struct ieee80211_local *local,
 618                                         u32 iter_flags,
 619                                         void (*iterator)(void *data, u8 *mac,
 620                                                 struct ieee80211_vif *vif),
 621                                         void *data)
 622 {
 623         struct ieee80211_sub_if_data *sdata;
 624
 625         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 626                 switch (sdata->vif.type) {
 627                 case NL80211_IFTYPE_MONITOR:
 628                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 629                                 continue;
 630                         break;
 631                 case NL80211_IFTYPE_AP_VLAN:
 632                         continue;
 633                 default:
 634                         break;
 635                 }
 636                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 637                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 638                         continue;
 639                 if (ieee80211_sdata_running(sdata))
 640                         iterator(data, sdata->vif.addr,
 641                                  &sdata->vif);
 642         }
 643
 644         sdata = rcu_dereference_check(local->monitor_sdata,
 645                                       lockdep_is_held(&local->iflist_mtx) ||
 646                                       lockdep_rtnl_is_held());
 647         if (sdata &&
 648             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 649              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 650                 iterator(data, sdata->vif.addr, &sdata->vif);
 651 }
 652
 653 void ieee80211_iterate_active_interfaces(
 654         struct ieee80211_hw *hw, u32 iter_flags,
 655         void (*iterator)(void *data, u8 *mac,
 656                          struct ieee80211_vif *vif),
 657         void *data)
 658 {
 659         struct ieee80211_local *local = hw_to_local(hw);
 660
 661         mutex_lock(&local->iflist_mtx);
 662         __iterate_active_interfaces(local, iter_flags, iterator, data);
 663         mutex_unlock(&local->iflist_mtx);
 664 }
 665 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 666
 667 void ieee80211_iterate_active_interfaces_atomic(
 668         struct ieee80211_hw *hw, u32 iter_flags,
 669         void (*iterator)(void *data, u8 *mac,
 670                          struct ieee80211_vif *vif),
 671         void *data)
 672 {
 673         struct ieee80211_local *local = hw_to_local(hw);
 674
 675         rcu_read_lock();
 676         __iterate_active_interfaces(local, iter_flags, iterator, data);
 677         rcu_read_unlock();
 678 }
 679 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 680
 681 void ieee80211_iterate_active_interfaces_rtnl(
 682         struct ieee80211_hw *hw, u32 iter_flags,
 683         void (*iterator)(void *data, u8 *mac,
 684                          struct ieee80211_vif *vif),
 685         void *data)
 686 {
 687         struct ieee80211_local *local = hw_to_local(hw);
 688
 689         ASSERT_RTNL();
 690
 691         __iterate_active_interfaces(local, iter_flags, iterator, data);
 692 }
 693 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 694
 695 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 696 {
 697         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 698
 699         if (!ieee80211_sdata_running(sdata) ||
 700             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 701                 return NULL;
 702         return &sdata->vif;
 703 }
 704 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 705
 706 /*
 707  * Nothing should have been stuffed into the workqueue during
 708  * the suspend->resume cycle. If this WARN is seen then there
 709  * is a bug with either the driver suspend or something in
 710  * mac80211 stuffing into the workqueue which we haven't yet
 711  * cleared during mac80211's suspend cycle.
 712  */
 713 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 714 {
 715         if (WARN(local->suspended && !local->resuming,
 716                  "queueing ieee80211 work while going to suspend\n"))
 717                 return false;
 718
 719         return true;
 720 }
 721
 722 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 723 {
 724         struct ieee80211_local *local = hw_to_local(hw);
 725
 726         if (!ieee80211_can_queue_work(local))
 727                 return;
 728
 729         queue_work(local->workqueue, work);
 730 }
 731 EXPORT_SYMBOL(ieee80211_queue_work);
 732
 733 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 734                                   struct delayed_work *dwork,
 735                                   unsigned long delay)
 736 {
 737         struct ieee80211_local *local = hw_to_local(hw);
 738
 739         if (!ieee80211_can_queue_work(local))
 740                 return;
 741
 742         queue_delayed_work(local->workqueue, dwork, delay);
 743 }
 744 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 745
 746 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 747                                struct ieee802_11_elems *elems,
 748                                u64 filter, u32 crc)
 749 {
 750         size_t left = len;
 751         const u8 *pos = start;
 752         bool calc_crc = filter != 0;
 753         DECLARE_BITMAP(seen_elems, 256);
 754         const u8 *ie;
 755
 756         bitmap_zero(seen_elems, 256);
 757         memset(elems, 0, sizeof(*elems));
 758         elems->ie_start = start;
 759         elems->total_len = len;
 760
 761         while (left >= 2) {
 762                 u8 id, elen;
 763                 bool elem_parse_failed;
 764
 765                 id = *pos++;
 766                 elen = *pos++;
 767                 left -= 2;
 768
 769                 if (elen > left) {
 770                         elems->parse_error = true;
 771                         break;
 772                 }
 773
 774                 switch (id) {
 775                 case WLAN_EID_SSID:
 776                 case WLAN_EID_SUPP_RATES:
 777                 case WLAN_EID_FH_PARAMS:
 778                 case WLAN_EID_DS_PARAMS:
 779                 case WLAN_EID_CF_PARAMS:
 780                 case WLAN_EID_TIM:
 781                 case WLAN_EID_IBSS_PARAMS:
 782                 case WLAN_EID_CHALLENGE:
 783                 case WLAN_EID_RSN:
 784                 case WLAN_EID_ERP_INFO:
 785                 case WLAN_EID_EXT_SUPP_RATES:
 786                 case WLAN_EID_HT_CAPABILITY:
 787                 case WLAN_EID_HT_OPERATION:
 788                 case WLAN_EID_VHT_CAPABILITY:
 789                 case WLAN_EID_VHT_OPERATION:
 790                 case WLAN_EID_MESH_ID:
 791                 case WLAN_EID_MESH_CONFIG:
 792                 case WLAN_EID_PEER_MGMT:
 793                 case WLAN_EID_PREQ:
 794                 case WLAN_EID_PREP:
 795                 case WLAN_EID_PERR:
 796                 case WLAN_EID_RANN:
 797                 case WLAN_EID_CHANNEL_SWITCH:
 798                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 799                 case WLAN_EID_COUNTRY:
 800                 case WLAN_EID_PWR_CONSTRAINT:
 801                 case WLAN_EID_TIMEOUT_INTERVAL:
 802                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 803                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 804                 case WLAN_EID_CHAN_SWITCH_PARAM:
 805                 /*
 806                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 807                  * that if the content gets bigger it might be needed more than once
 808                  */
 809                         if (test_bit(id, seen_elems)) {
 810                                 elems->parse_error = true;
 811                                 left -= elen;
 812                                 pos += elen;
 813                                 continue;
 814                         }
 815                         break;
 816                 }
 817
 818                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 819                         crc = crc32_be(crc, pos - 2, elen + 2);
 820
 821                 elem_parse_failed = false;
 822
 823                 switch (id) {
 824                 case WLAN_EID_SSID:
 825                         elems->ssid = pos;
 826                         elems->ssid_len = elen;
 827                         break;
 828                 case WLAN_EID_SUPP_RATES:
 829                         elems->supp_rates = pos;
 830                         elems->supp_rates_len = elen;
 831                         break;
 832                 case WLAN_EID_DS_PARAMS:
 833                         if (elen >= 1)
 834                                 elems->ds_params = pos;
 835                         else
 836                                 elem_parse_failed = true;
 837                         break;
 838                 case WLAN_EID_TIM:
 839                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 840                                 elems->tim = (void *)pos;
 841                                 elems->tim_len = elen;
 842                         } else
 843                                 elem_parse_failed = true;
 844                         break;
 845                 case WLAN_EID_CHALLENGE:
 846                         elems->challenge = pos;
 847                         elems->challenge_len = elen;
 848                         break;
 849                 case WLAN_EID_VENDOR_SPECIFIC:
 850                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 851                             pos[2] == 0xf2) {
 852                                 /* Microsoft OUI (00:50:F2) */
 853
 854                                 if (calc_crc)
 855                                         crc = crc32_be(crc, pos - 2, elen + 2);
 856
 857                                 if (elen >= 5 && pos[3] == 2) {
 858                                         /* OUI Type 2 - WMM IE */
 859                                         if (pos[4] == 0) {
 860                                                 elems->wmm_info = pos;
 861                                                 elems->wmm_info_len = elen;
 862                                         } else if (pos[4] == 1) {
 863                                                 elems->wmm_param = pos;
 864                                                 elems->wmm_param_len = elen;
 865                                         }
 866                                 }
 867                         }
 868                         break;
 869                 case WLAN_EID_RSN:
 870                         elems->rsn = pos;
 871                         elems->rsn_len = elen;
 872                         break;
 873                 case WLAN_EID_ERP_INFO:
 874                         if (elen >= 1)
 875                                 elems->erp_info = pos;
 876                         else
 877                                 elem_parse_failed = true;
 878                         break;
 879                 case WLAN_EID_EXT_SUPP_RATES:
 880                         elems->ext_supp_rates = pos;
 881                         elems->ext_supp_rates_len = elen;
 882                         break;
 883                 case WLAN_EID_HT_CAPABILITY:
 884                         if (elen >= sizeof(struct ieee80211_ht_cap))
 885                                 elems->ht_cap_elem = (void *)pos;
 886                         else
 887                                 elem_parse_failed = true;
 888                         break;
 889                 case WLAN_EID_HT_OPERATION:
 890                         if (elen >= sizeof(struct ieee80211_ht_operation))
 891                                 elems->ht_operation = (void *)pos;
 892                         else
 893                                 elem_parse_failed = true;
 894                         break;
 895                 case WLAN_EID_VHT_CAPABILITY:
 896                         if (elen >= sizeof(struct ieee80211_vht_cap))
 897                                 elems->vht_cap_elem = (void *)pos;
 898                         else
 899                                 elem_parse_failed = true;
 900                         break;
 901                 case WLAN_EID_VHT_OPERATION:
 902                         if (elen >= sizeof(struct ieee80211_vht_operation))
 903                                 elems->vht_operation = (void *)pos;
 904                         else
 905                                 elem_parse_failed = true;
 906                         break;
 907                 case WLAN_EID_OPMODE_NOTIF:
 908                         if (elen > 0)
 909                                 elems->opmode_notif = pos;
 910                         else
 911                                 elem_parse_failed = true;
 912                         break;
 913                 case WLAN_EID_MESH_ID:
 914                         elems->mesh_id = pos;
 915                         elems->mesh_id_len = elen;
 916                         break;
 917                 case WLAN_EID_MESH_CONFIG:
 918                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 919                                 elems->mesh_config = (void *)pos;
 920                         else
 921                                 elem_parse_failed = true;
 922                         break;
 923                 case WLAN_EID_PEER_MGMT:
 924                         elems->peering = pos;
 925                         elems->peering_len = elen;
 926                         break;
 927                 case WLAN_EID_MESH_AWAKE_WINDOW:
 928                         if (elen >= 2)
 929                                 elems->awake_window = (void *)pos;
 930                         break;
 931                 case WLAN_EID_PREQ:
 932                         elems->preq = pos;
 933                         elems->preq_len = elen;
 934                         break;
 935                 case WLAN_EID_PREP:
 936                         elems->prep = pos;
 937                         elems->prep_len = elen;
 938                         break;
 939                 case WLAN_EID_PERR:
 940                         elems->perr = pos;
 941                         elems->perr_len = elen;
 942                         break;
 943                 case WLAN_EID_RANN:
 944                         if (elen >= sizeof(struct ieee80211_rann_ie))
 945                                 elems->rann = (void *)pos;
 946                         else
 947                                 elem_parse_failed = true;
 948                         break;
 949                 case WLAN_EID_CHANNEL_SWITCH:
 950                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 951                                 elem_parse_failed = true;
 952                                 break;
 953                         }
 954                         elems->ch_switch_ie = (void *)pos;
 955                         break;
 956                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 957                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
 958                                 elem_parse_failed = true;
 959                                 break;
 960                         }
 961                         elems->ext_chansw_ie = (void *)pos;
 962                         break;
 963                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 964                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
 965                                 elem_parse_failed = true;
 966                                 break;
 967                         }
 968                         elems->sec_chan_offs = (void *)pos;
 969                         break;
 970                 case WLAN_EID_CHAN_SWITCH_PARAM:
 971                         if (elen !=
 972                             sizeof(*elems->mesh_chansw_params_ie)) {
 973                                 elem_parse_failed = true;
 974                                 break;
 975                         }
 976                         elems->mesh_chansw_params_ie = (void *)pos;
 977                         break;
 978                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 979                         if (!action ||
 980                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
 981                                 elem_parse_failed = true;
 982                                 break;
 983                         }
 984                         elems->wide_bw_chansw_ie = (void *)pos;
 985                         break;
 986                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
 987                         if (action) {
 988                                 elem_parse_failed = true;
 989                                 break;
 990                         }
 991                         /*
 992                          * This is a bit tricky, but as we only care about
 993                          * the wide bandwidth channel switch element, so
 994                          * just parse it out manually.
 995                          */
 996                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
 997                                               pos, elen);
 998                         if (ie) {
 999                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1000                                         elems->wide_bw_chansw_ie =
1001                                                 (void *)(ie + 2);
1002                                 else
1003                                         elem_parse_failed = true;
1004                         }
1005                         break;
1006                 case WLAN_EID_COUNTRY:
1007                         elems->country_elem = pos;
1008                         elems->country_elem_len = elen;
1009                         break;
1010                 case WLAN_EID_PWR_CONSTRAINT:
1011                         if (elen != 1) {
1012                                 elem_parse_failed = true;
1013                                 break;
1014                         }
1015                         elems->pwr_constr_elem = pos;
1016                         break;
1017                 case WLAN_EID_TIMEOUT_INTERVAL:
1018                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1019                                 elems->timeout_int = (void *)pos;
1020                         else
1021                                 elem_parse_failed = true;
1022                         break;
1023                 default:
1024                         break;
1025                 }
1026
1027                 if (elem_parse_failed)
1028                         elems->parse_error = true;
1029                 else
1030                         __set_bit(id, seen_elems);
1031
1032                 left -= elen;
1033                 pos += elen;
1034         }
1035
1036         if (left != 0)
1037                 elems->parse_error = true;
1038
1039         return crc;
1040 }
1041
1042 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1043                                bool bss_notify)
1044 {
1045         struct ieee80211_local *local = sdata->local;
1046         struct ieee80211_tx_queue_params qparam;
1047         struct ieee80211_chanctx_conf *chanctx_conf;
1048         int ac;
1049         bool use_11b, enable_qos;
1050         int aCWmin, aCWmax;
1051
1052         if (!local->ops->conf_tx)
1053                 return;
1054
1055         if (local->hw.queues < IEEE80211_NUM_ACS)
1056                 return;
1057
1058         memset(&qparam, 0, sizeof(qparam));
1059
1060         rcu_read_lock();
1061         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1062         use_11b = (chanctx_conf &&
1063                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1064                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1065         rcu_read_unlock();
1066
1067         /*
1068          * By default disable QoS in STA mode for old access points, which do
1069          * not support 802.11e. New APs will provide proper queue parameters,
1070          * that we will configure later.
1071          */
1072         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1073
1074         /* Set defaults according to 802.11-2007 Table 7-37 */
1075         aCWmax = 1023;
1076         if (use_11b)
1077                 aCWmin = 31;
1078         else
1079                 aCWmin = 15;
1080
1081         /* Confiure old 802.11b/g medium access rules. */
1082         qparam.cw_max = aCWmax;
1083         qparam.cw_min = aCWmin;
1084         qparam.txop = 0;
1085         qparam.aifs = 2;
1086
1087         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1088                 /* Update if QoS is enabled. */
1089                 if (enable_qos) {
1090                         switch (ac) {
1091                         case IEEE80211_AC_BK:
1092                                 qparam.cw_max = aCWmax;
1093                                 qparam.cw_min = aCWmin;
1094                                 qparam.txop = 0;
1095                                 qparam.aifs = 7;
1096                                 break;
1097                         /* never happens but let's not leave undefined */
1098                         default:
1099                         case IEEE80211_AC_BE:
1100                                 qparam.cw_max = aCWmax;
1101                                 qparam.cw_min = aCWmin;
1102                                 qparam.txop = 0;
1103                                 qparam.aifs = 3;
1104                                 break;
1105                         case IEEE80211_AC_VI:
1106                                 qparam.cw_max = aCWmin;
1107                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1108                                 if (use_11b)
1109                                         qparam.txop = 6016/32;
1110                                 else
1111                                         qparam.txop = 3008/32;
1112                                 qparam.aifs = 2;
1113                                 break;
1114                         case IEEE80211_AC_VO:
1115                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1116                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1117                                 if (use_11b)
1118                                         qparam.txop = 3264/32;
1119                                 else
1120                                         qparam.txop = 1504/32;
1121                                 qparam.aifs = 2;
1122                                 break;
1123                         }
1124                 }
1125
1126                 qparam.uapsd = false;
1127
1128                 sdata->tx_conf[ac] = qparam;
1129                 drv_conf_tx(local, sdata, ac, &qparam);
1130         }
1131
1132         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1133             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1134                 sdata->vif.bss_conf.qos = enable_qos;
1135                 if (bss_notify)
1136                         ieee80211_bss_info_change_notify(sdata,
1137                                                          BSS_CHANGED_QOS);
1138         }
1139 }
1140
1141 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1142                          u16 transaction, u16 auth_alg, u16 status,
1143                          const u8 *extra, size_t extra_len, const u8 *da,
1144                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1145                          u32 tx_flags)
1146 {
1147         struct ieee80211_local *local = sdata->local;
1148         struct sk_buff *skb;
1149         struct ieee80211_mgmt *mgmt;
1150         int err;
1151
1152         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1153         skb = dev_alloc_skb(local->hw.extra_tx_headroom + 24 + 6 + extra_len);
1154         if (!skb)
1155                 return;
1156
1157         skb_reserve(skb, local->hw.extra_tx_headroom);
1158
1159         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1160         memset(mgmt, 0, 24 + 6);
1161         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1162                                           IEEE80211_STYPE_AUTH);
1163         memcpy(mgmt->da, da, ETH_ALEN);
1164         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1165         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1166         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1167         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1168         mgmt->u.auth.status_code = cpu_to_le16(status);
1169         if (extra)
1170                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1171
1172         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1173                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1174                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1175                 WARN_ON(err);
1176         }
1177
1178         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1179                                         tx_flags;
1180         ieee80211_tx_skb(sdata, skb);
1181 }
1182
1183 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1184                                     const u8 *bssid, u16 stype, u16 reason,
1185                                     bool send_frame, u8 *frame_buf)
1186 {
1187         struct ieee80211_local *local = sdata->local;
1188         struct sk_buff *skb;
1189         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1190
1191         /* build frame */
1192         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1193         mgmt->duration = 0; /* initialize only */
1194         mgmt->seq_ctrl = 0; /* initialize only */
1195         memcpy(mgmt->da, bssid, ETH_ALEN);
1196         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1197         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1198         /* u.deauth.reason_code == u.disassoc.reason_code */
1199         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1200
1201         if (send_frame) {
1202                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1203                                     IEEE80211_DEAUTH_FRAME_LEN);
1204                 if (!skb)
1205                         return;
1206
1207                 skb_reserve(skb, local->hw.extra_tx_headroom);
1208
1209                 /* copy in frame */
1210                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1211                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1212
1213                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1214                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1215                         IEEE80211_SKB_CB(skb)->flags |=
1216                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1217
1218                 ieee80211_tx_skb(sdata, skb);
1219         }
1220 }
1221
1222 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1223                                          u8 *buffer, size_t buffer_len,
1224                                          const u8 *ie, size_t ie_len,
1225                                          enum ieee80211_band band,
1226                                          u32 rate_mask,
1227                                          struct cfg80211_chan_def *chandef,
1228                                          size_t *offset)
1229 {
1230         struct ieee80211_supported_band *sband;
1231         u8 *pos = buffer, *end = buffer + buffer_len;
1232         size_t noffset;
1233         int supp_rates_len, i;
1234         u8 rates[32];
1235         int num_rates;
1236         int ext_rates_len;
1237         int shift;
1238         u32 rate_flags;
1239
1240         *offset = 0;
1241
1242         sband = local->hw.wiphy->bands[band];
1243         if (WARN_ON_ONCE(!sband))
1244                 return 0;
1245
1246         rate_flags = ieee80211_chandef_rate_flags(chandef);
1247         shift = ieee80211_chandef_get_shift(chandef);
1248
1249         num_rates = 0;
1250         for (i = 0; i < sband->n_bitrates; i++) {
1251                 if ((BIT(i) & rate_mask) == 0)
1252                         continue; /* skip rate */
1253                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1254                         continue;
1255
1256                 rates[num_rates++] =
1257                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1258                                           (1 << shift) * 5);
1259         }
1260
1261         supp_rates_len = min_t(int, num_rates, 8);
1262
1263         if (end - pos < 2 + supp_rates_len)
1264                 goto out_err;
1265         *pos++ = WLAN_EID_SUPP_RATES;
1266         *pos++ = supp_rates_len;
1267         memcpy(pos, rates, supp_rates_len);
1268         pos += supp_rates_len;
1269
1270         /* insert "request information" if in custom IEs */
1271         if (ie && ie_len) {
1272                 static const u8 before_extrates[] = {
1273                         WLAN_EID_SSID,
1274                         WLAN_EID_SUPP_RATES,
1275                         WLAN_EID_REQUEST,
1276                 };
1277                 noffset = ieee80211_ie_split(ie, ie_len,
1278                                              before_extrates,
1279                                              ARRAY_SIZE(before_extrates),
1280                                              *offset);
1281                 if (end - pos < noffset - *offset)
1282                         goto out_err;
1283                 memcpy(pos, ie + *offset, noffset - *offset);
1284                 pos += noffset - *offset;
1285                 *offset = noffset;
1286         }
1287
1288         ext_rates_len = num_rates - supp_rates_len;
1289         if (ext_rates_len > 0) {
1290                 if (end - pos < 2 + ext_rates_len)
1291                         goto out_err;
1292                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1293                 *pos++ = ext_rates_len;
1294                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1295                 pos += ext_rates_len;
1296         }
1297
1298         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1299                 if (end - pos < 3)
1300                         goto out_err;
1301                 *pos++ = WLAN_EID_DS_PARAMS;
1302                 *pos++ = 1;
1303                 *pos++ = ieee80211_frequency_to_channel(
1304                                 chandef->chan->center_freq);
1305         }
1306
1307         /* insert custom IEs that go before HT */
1308         if (ie && ie_len) {
1309                 static const u8 before_ht[] = {
1310                         WLAN_EID_SSID,
1311                         WLAN_EID_SUPP_RATES,
1312                         WLAN_EID_REQUEST,
1313                         WLAN_EID_EXT_SUPP_RATES,
1314                         WLAN_EID_DS_PARAMS,
1315                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1316                 };
1317                 noffset = ieee80211_ie_split(ie, ie_len,
1318                                              before_ht, ARRAY_SIZE(before_ht),
1319                                              *offset);
1320                 if (end - pos < noffset - *offset)
1321                         goto out_err;
1322                 memcpy(pos, ie + *offset, noffset - *offset);
1323                 pos += noffset - *offset;
1324                 *offset = noffset;
1325         }
1326
1327         if (sband->ht_cap.ht_supported) {
1328                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1329                         goto out_err;
1330                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1331                                                 sband->ht_cap.cap);
1332         }
1333
1334         /*
1335          * If adding more here, adjust code in main.c
1336          * that calculates local->scan_ies_len.
1337          */
1338
1339         /* insert custom IEs that go before VHT */
1340         if (ie && ie_len) {
1341                 static const u8 before_vht[] = {
1342                         WLAN_EID_SSID,
1343                         WLAN_EID_SUPP_RATES,
1344                         WLAN_EID_REQUEST,
1345                         WLAN_EID_EXT_SUPP_RATES,
1346                         WLAN_EID_DS_PARAMS,
1347                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1348                         WLAN_EID_HT_CAPABILITY,
1349                         WLAN_EID_BSS_COEX_2040,
1350                         WLAN_EID_EXT_CAPABILITY,
1351                         WLAN_EID_SSID_LIST,
1352                         WLAN_EID_CHANNEL_USAGE,
1353                         WLAN_EID_INTERWORKING,
1354                         /* mesh ID can't happen here */
1355                         /* 60 GHz can't happen here right now */
1356                 };
1357                 noffset = ieee80211_ie_split(ie, ie_len,
1358                                              before_vht, ARRAY_SIZE(before_vht),
1359                                              *offset);
1360                 if (end - pos < noffset - *offset)
1361                         goto out_err;
1362                 memcpy(pos, ie + *offset, noffset - *offset);
1363                 pos += noffset - *offset;
1364                 *offset = noffset;
1365         }
1366
1367         if (sband->vht_cap.vht_supported) {
1368                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1369                         goto out_err;
1370                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1371                                                  sband->vht_cap.cap);
1372         }
1373
1374         return pos - buffer;
1375  out_err:
1376         WARN_ONCE(1, "not enough space for preq IEs\n");
1377         return pos - buffer;
1378 }
1379
1380 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1381                              size_t buffer_len,
1382                              struct ieee80211_scan_ies *ie_desc,
1383                              const u8 *ie, size_t ie_len,
1384                              u8 bands_used, u32 *rate_masks,
1385                              struct cfg80211_chan_def *chandef)
1386 {
1387         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1388         int i;
1389
1390         memset(ie_desc, 0, sizeof(*ie_desc));
1391
1392         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1393                 if (bands_used & BIT(i)) {
1394                         pos += ieee80211_build_preq_ies_band(local,
1395                                                              buffer + pos,
1396                                                              buffer_len - pos,
1397                                                              ie, ie_len, i,
1398                                                              rate_masks[i],
1399                                                              chandef,
1400                                                              &custom_ie_offset);
1401                         ie_desc->ies[i] = buffer + old_pos;
1402                         ie_desc->len[i] = pos - old_pos;
1403                         old_pos = pos;
1404                 }
1405         }
1406
1407         /* add any remaining custom IEs */
1408         if (ie && ie_len) {
1409                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1410                               "not enough space for preq custom IEs\n"))
1411                         return pos;
1412                 memcpy(buffer + pos, ie + custom_ie_offset,
1413                        ie_len - custom_ie_offset);
1414                 ie_desc->common_ies = buffer + pos;
1415                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1416                 pos += ie_len - custom_ie_offset;
1417         }
1418
1419         return pos;
1420 };
1421
1422 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1423                                           u8 *dst, u32 ratemask,
1424                                           struct ieee80211_channel *chan,
1425                                           const u8 *ssid, size_t ssid_len,
1426                                           const u8 *ie, size_t ie_len,
1427                                           bool directed)
1428 {
1429         struct ieee80211_local *local = sdata->local;
1430         struct cfg80211_chan_def chandef;
1431         struct sk_buff *skb;
1432         struct ieee80211_mgmt *mgmt;
1433         int ies_len;
1434         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1435         struct ieee80211_scan_ies dummy_ie_desc;
1436
1437         /*
1438          * Do not send DS Channel parameter for directed probe requests
1439          * in order to maximize the chance that we get a response.  Some
1440          * badly-behaved APs don't respond when this parameter is included.
1441          */
1442         chandef.width = sdata->vif.bss_conf.chandef.width;
1443         if (directed)
1444                 chandef.chan = NULL;
1445         else
1446                 chandef.chan = chan;
1447
1448         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1449                                      ssid, ssid_len, 100 + ie_len);
1450         if (!skb)
1451                 return NULL;
1452
1453         rate_masks[chan->band] = ratemask;
1454         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1455                                            skb_tailroom(skb), &dummy_ie_desc,
1456                                            ie, ie_len, BIT(chan->band),
1457                                            rate_masks, &chandef);
1458         skb_put(skb, ies_len);
1459
1460         if (dst) {
1461                 mgmt = (struct ieee80211_mgmt *) skb->data;
1462                 memcpy(mgmt->da, dst, ETH_ALEN);
1463                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1464         }
1465
1466         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1467
1468         return skb;
1469 }
1470
1471 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1472                               const u8 *ssid, size_t ssid_len,
1473                               const u8 *ie, size_t ie_len,
1474                               u32 ratemask, bool directed, u32 tx_flags,
1475                               struct ieee80211_channel *channel, bool scan)
1476 {
1477         struct sk_buff *skb;
1478
1479         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1480                                         ssid, ssid_len,
1481                                         ie, ie_len, directed);
1482         if (skb) {
1483                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1484                 if (scan)
1485                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1486                 else
1487                         ieee80211_tx_skb(sdata, skb);
1488         }
1489 }
1490
1491 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1492                             struct ieee802_11_elems *elems,
1493                             enum ieee80211_band band, u32 *basic_rates)
1494 {
1495         struct ieee80211_supported_band *sband;
1496         size_t num_rates;
1497         u32 supp_rates, rate_flags;
1498         int i, j, shift;
1499         sband = sdata->local->hw.wiphy->bands[band];
1500
1501         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1502         shift = ieee80211_vif_get_shift(&sdata->vif);
1503
1504         if (WARN_ON(!sband))
1505                 return 1;
1506
1507         num_rates = sband->n_bitrates;
1508         supp_rates = 0;
1509         for (i = 0; i < elems->supp_rates_len +
1510                      elems->ext_supp_rates_len; i++) {
1511                 u8 rate = 0;
1512                 int own_rate;
1513                 bool is_basic;
1514                 if (i < elems->supp_rates_len)
1515                         rate = elems->supp_rates[i];
1516                 else if (elems->ext_supp_rates)
1517                         rate = elems->ext_supp_rates
1518                                 [i - elems->supp_rates_len];
1519                 own_rate = 5 * (rate & 0x7f);
1520                 is_basic = !!(rate & 0x80);
1521
1522                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1523                         continue;
1524
1525                 for (j = 0; j < num_rates; j++) {
1526                         int brate;
1527                         if ((rate_flags & sband->bitrates[j].flags)
1528                             != rate_flags)
1529                                 continue;
1530
1531                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1532                                              1 << shift);
1533
1534                         if (brate == own_rate) {
1535                                 supp_rates |= BIT(j);
1536                                 if (basic_rates && is_basic)
1537                                         *basic_rates |= BIT(j);
1538                         }
1539                 }
1540         }
1541         return supp_rates;
1542 }
1543
1544 void ieee80211_stop_device(struct ieee80211_local *local)
1545 {
1546         ieee80211_led_radio(local, false);
1547         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1548
1549         cancel_work_sync(&local->reconfig_filter);
1550
1551         flush_workqueue(local->workqueue);
1552         drv_stop(local);
1553 }
1554
1555 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1556 {
1557         struct ieee80211_sub_if_data *sdata;
1558         struct ieee80211_chanctx *ctx;
1559
1560         /*
1561          * We get here if during resume the device can't be restarted properly.
1562          * We might also get here if this happens during HW reset, which is a
1563          * slightly different situation and we need to drop all connections in
1564          * the latter case.
1565          *
1566          * Ask cfg80211 to turn off all interfaces, this will result in more
1567          * warnings but at least we'll then get into a clean stopped state.
1568          */
1569
1570         local->resuming = false;
1571         local->suspended = false;
1572         local->started = false;
1573
1574         /* scheduled scan clearly can't be running any more, but tell
1575          * cfg80211 and clear local state
1576          */
1577         ieee80211_sched_scan_end(local);
1578
1579         list_for_each_entry(sdata, &local->interfaces, list)
1580                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1581
1582         /* Mark channel contexts as not being in the driver any more to avoid
1583          * removing them from the driver during the shutdown process...
1584          */
1585         mutex_lock(&local->chanctx_mtx);
1586         list_for_each_entry(ctx, &local->chanctx_list, list)
1587                 ctx->driver_present = false;
1588         mutex_unlock(&local->chanctx_mtx);
1589
1590         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1591 }
1592
1593 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1594                                      struct ieee80211_sub_if_data *sdata)
1595 {
1596         struct ieee80211_chanctx_conf *conf;
1597         struct ieee80211_chanctx *ctx;
1598
1599         if (!local->use_chanctx)
1600                 return;
1601
1602         mutex_lock(&local->chanctx_mtx);
1603         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1604                                          lockdep_is_held(&local->chanctx_mtx));
1605         if (conf) {
1606                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1607                 drv_assign_vif_chanctx(local, sdata, ctx);
1608         }
1609         mutex_unlock(&local->chanctx_mtx);
1610 }
1611
1612 int ieee80211_reconfig(struct ieee80211_local *local)
1613 {
1614         struct ieee80211_hw *hw = &local->hw;
1615         struct ieee80211_sub_if_data *sdata;
1616         struct ieee80211_chanctx *ctx;
1617         struct sta_info *sta;
1618         int res, i;
1619         bool reconfig_due_to_wowlan = false;
1620         struct ieee80211_sub_if_data *sched_scan_sdata;
1621         bool sched_scan_stopped = false;
1622
1623 #ifdef CONFIG_PM
1624         if (local->suspended)
1625                 local->resuming = true;
1626
1627         if (local->wowlan) {
1628                 res = drv_resume(local);
1629                 local->wowlan = false;
1630                 if (res < 0) {
1631                         local->resuming = false;
1632                         return res;
1633                 }
1634                 if (res == 0)
1635                         goto wake_up;
1636                 WARN_ON(res > 1);
1637                 /*
1638                  * res is 1, which means the driver requested
1639                  * to go through a regular reset on wakeup.
1640                  */
1641                 reconfig_due_to_wowlan = true;
1642         }
1643 #endif
1644         /* everything else happens only if HW was up & running */
1645         if (!local->open_count)
1646                 goto wake_up;
1647
1648         /*
1649          * Upon resume hardware can sometimes be goofy due to
1650          * various platform / driver / bus issues, so restarting
1651          * the device may at times not work immediately. Propagate
1652          * the error.
1653          */
1654         res = drv_start(local);
1655         if (res) {
1656                 if (local->suspended)
1657                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1658                 else
1659                         WARN(1, "Hardware became unavailable during restart.\n");
1660                 ieee80211_handle_reconfig_failure(local);
1661                 return res;
1662         }
1663
1664         /* setup fragmentation threshold */
1665         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1666
1667         /* setup RTS threshold */
1668         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1669
1670         /* reset coverage class */
1671         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1672
1673         ieee80211_led_radio(local, true);
1674         ieee80211_mod_tpt_led_trig(local,
1675                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1676
1677         /* add interfaces */
1678         sdata = rtnl_dereference(local->monitor_sdata);
1679         if (sdata) {
1680                 /* in HW restart it exists already */
1681                 WARN_ON(local->resuming);
1682                 res = drv_add_interface(local, sdata);
1683                 if (WARN_ON(res)) {
1684                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1685                         synchronize_net();
1686                         kfree(sdata);
1687                 }
1688         }
1689
1690         list_for_each_entry(sdata, &local->interfaces, list) {
1691                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1692                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1693                     ieee80211_sdata_running(sdata))
1694                         res = drv_add_interface(local, sdata);
1695         }
1696
1697         /* add channel contexts */
1698         if (local->use_chanctx) {
1699                 mutex_lock(&local->chanctx_mtx);
1700                 list_for_each_entry(ctx, &local->chanctx_list, list)
1701                         if (ctx->replace_state !=
1702                             IEEE80211_CHANCTX_REPLACES_OTHER)
1703                                 WARN_ON(drv_add_chanctx(local, ctx));
1704                 mutex_unlock(&local->chanctx_mtx);
1705
1706                 list_for_each_entry(sdata, &local->interfaces, list) {
1707                         if (!ieee80211_sdata_running(sdata))
1708                                 continue;
1709                         ieee80211_assign_chanctx(local, sdata);
1710                 }
1711
1712                 sdata = rtnl_dereference(local->monitor_sdata);
1713                 if (sdata && ieee80211_sdata_running(sdata))
1714                         ieee80211_assign_chanctx(local, sdata);
1715         }
1716
1717         /* add STAs back */
1718         mutex_lock(&local->sta_mtx);
1719         list_for_each_entry(sta, &local->sta_list, list) {
1720                 enum ieee80211_sta_state state;
1721
1722                 if (!sta->uploaded)
1723                         continue;
1724
1725                 /* AP-mode stations will be added later */
1726                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1727                         continue;
1728
1729                 for (state = IEEE80211_STA_NOTEXIST;
1730                      state < sta->sta_state; state++)
1731                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1732                                               state + 1));
1733         }
1734         mutex_unlock(&local->sta_mtx);
1735
1736         /* reconfigure tx conf */
1737         if (hw->queues >= IEEE80211_NUM_ACS) {
1738                 list_for_each_entry(sdata, &local->interfaces, list) {
1739                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1740                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1741                             !ieee80211_sdata_running(sdata))
1742                                 continue;
1743
1744                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1745                                 drv_conf_tx(local, sdata, i,
1746                                             &sdata->tx_conf[i]);
1747                 }
1748         }
1749
1750         /* reconfigure hardware */
1751         ieee80211_hw_config(local, ~0);
1752
1753         ieee80211_configure_filter(local);
1754
1755         /* Finally also reconfigure all the BSS information */
1756         list_for_each_entry(sdata, &local->interfaces, list) {
1757                 u32 changed;
1758
1759                 if (!ieee80211_sdata_running(sdata))
1760                         continue;
1761
1762                 /* common change flags for all interface types */
1763                 changed = BSS_CHANGED_ERP_CTS_PROT |
1764                           BSS_CHANGED_ERP_PREAMBLE |
1765                           BSS_CHANGED_ERP_SLOT |
1766                           BSS_CHANGED_HT |
1767                           BSS_CHANGED_BASIC_RATES |
1768                           BSS_CHANGED_BEACON_INT |
1769                           BSS_CHANGED_BSSID |
1770                           BSS_CHANGED_CQM |
1771                           BSS_CHANGED_QOS |
1772                           BSS_CHANGED_IDLE |
1773                           BSS_CHANGED_TXPOWER;
1774
1775                 switch (sdata->vif.type) {
1776                 case NL80211_IFTYPE_STATION:
1777                         changed |= BSS_CHANGED_ASSOC |
1778                                    BSS_CHANGED_ARP_FILTER |
1779                                    BSS_CHANGED_PS;
1780
1781                         /* Re-send beacon info report to the driver */
1782                         if (sdata->u.mgd.have_beacon)
1783                                 changed |= BSS_CHANGED_BEACON_INFO;
1784
1785                         sdata_lock(sdata);
1786                         ieee80211_bss_info_change_notify(sdata, changed);
1787                         sdata_unlock(sdata);
1788                         break;
1789                 case NL80211_IFTYPE_ADHOC:
1790                         changed |= BSS_CHANGED_IBSS;
1791                         /* fall through */
1792                 case NL80211_IFTYPE_AP:
1793                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1794
1795                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1796                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1797
1798                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1799                                         drv_start_ap(local, sdata);
1800                         }
1801
1802                         /* fall through */
1803                 case NL80211_IFTYPE_MESH_POINT:
1804                         if (sdata->vif.bss_conf.enable_beacon) {
1805                                 changed |= BSS_CHANGED_BEACON |
1806                                            BSS_CHANGED_BEACON_ENABLED;
1807                                 ieee80211_bss_info_change_notify(sdata, changed);
1808                         }
1809                         break;
1810                 case NL80211_IFTYPE_WDS:
1811                 case NL80211_IFTYPE_AP_VLAN:
1812                 case NL80211_IFTYPE_MONITOR:
1813                 case NL80211_IFTYPE_P2P_DEVICE:
1814                         /* nothing to do */
1815                         break;
1816                 case NL80211_IFTYPE_UNSPECIFIED:
1817                 case NUM_NL80211_IFTYPES:
1818                 case NL80211_IFTYPE_P2P_CLIENT:
1819                 case NL80211_IFTYPE_P2P_GO:
1820                         WARN_ON(1);
1821                         break;
1822                 }
1823         }
1824
1825         ieee80211_recalc_ps(local, -1);
1826
1827         /*
1828          * The sta might be in psm against the ap (e.g. because
1829          * this was the state before a hw restart), so we
1830          * explicitly send a null packet in order to make sure
1831          * it'll sync against the ap (and get out of psm).
1832          */
1833         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1834                 list_for_each_entry(sdata, &local->interfaces, list) {
1835                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1836                                 continue;
1837                         if (!sdata->u.mgd.associated)
1838                                 continue;
1839
1840                         ieee80211_send_nullfunc(local, sdata, 0);
1841                 }
1842         }
1843
1844         /* APs are now beaconing, add back stations */
1845         mutex_lock(&local->sta_mtx);
1846         list_for_each_entry(sta, &local->sta_list, list) {
1847                 enum ieee80211_sta_state state;
1848
1849                 if (!sta->uploaded)
1850                         continue;
1851
1852                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1853                         continue;
1854
1855                 for (state = IEEE80211_STA_NOTEXIST;
1856                      state < sta->sta_state; state++)
1857                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1858                                               state + 1));
1859         }
1860         mutex_unlock(&local->sta_mtx);
1861
1862         /* add back keys */
1863         list_for_each_entry(sdata, &local->interfaces, list)
1864                 if (ieee80211_sdata_running(sdata))
1865                         ieee80211_enable_keys(sdata);
1866
1867  wake_up:
1868         local->in_reconfig = false;
1869         barrier();
1870
1871         if (local->monitors == local->open_count && local->monitors > 0)
1872                 ieee80211_add_virtual_monitor(local);
1873
1874         /*
1875          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1876          * sessions can be established after a resume.
1877          *
1878          * Also tear down aggregation sessions since reconfiguring
1879          * them in a hardware restart scenario is not easily done
1880          * right now, and the hardware will have lost information
1881          * about the sessions, but we and the AP still think they
1882          * are active. This is really a workaround though.
1883          */
1884         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1885                 mutex_lock(&local->sta_mtx);
1886
1887                 list_for_each_entry(sta, &local->sta_list, list) {
1888                         ieee80211_sta_tear_down_BA_sessions(
1889                                         sta, AGG_STOP_LOCAL_REQUEST);
1890                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1891                 }
1892
1893                 mutex_unlock(&local->sta_mtx);
1894         }
1895
1896         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1897                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1898                                         false);
1899
1900         /*
1901          * Reconfigure sched scan if it was interrupted by FW restart or
1902          * suspend.
1903          */
1904         mutex_lock(&local->mtx);
1905         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1906                                                 lockdep_is_held(&local->mtx));
1907         if (sched_scan_sdata && local->sched_scan_req)
1908                 /*
1909                  * Sched scan stopped, but we don't want to report it. Instead,
1910                  * we're trying to reschedule.
1911                  */
1912                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1913                                                          local->sched_scan_req))
1914                         sched_scan_stopped = true;
1915         mutex_unlock(&local->mtx);
1916
1917         if (sched_scan_stopped)
1918                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1919
1920         /*
1921          * If this is for hw restart things are still running.
1922          * We may want to change that later, however.
1923          */
1924         if (!local->suspended || reconfig_due_to_wowlan)
1925                 drv_restart_complete(local);
1926
1927         if (!local->suspended)
1928                 return 0;
1929
1930 #ifdef CONFIG_PM
1931         /* first set suspended false, then resuming */
1932         local->suspended = false;
1933         mb();
1934         local->resuming = false;
1935
1936         list_for_each_entry(sdata, &local->interfaces, list) {
1937                 if (!ieee80211_sdata_running(sdata))
1938                         continue;
1939                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1940                         ieee80211_sta_restart(sdata);
1941         }
1942
1943         mod_timer(&local->sta_cleanup, jiffies + 1);
1944 #else
1945         WARN_ON(1);
1946 #endif
1947
1948         return 0;
1949 }
1950
1951 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
1952 {
1953         struct ieee80211_sub_if_data *sdata;
1954         struct ieee80211_local *local;
1955         struct ieee80211_key *key;
1956
1957         if (WARN_ON(!vif))
1958                 return;
1959
1960         sdata = vif_to_sdata(vif);
1961         local = sdata->local;
1962
1963         if (WARN_ON(!local->resuming))
1964                 return;
1965
1966         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
1967                 return;
1968
1969         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
1970
1971         mutex_lock(&local->key_mtx);
1972         list_for_each_entry(key, &sdata->key_list, list)
1973                 key->flags |= KEY_FLAG_TAINTED;
1974         mutex_unlock(&local->key_mtx);
1975 }
1976 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
1977
1978 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
1979 {
1980         struct ieee80211_local *local = sdata->local;
1981         struct ieee80211_chanctx_conf *chanctx_conf;
1982         struct ieee80211_chanctx *chanctx;
1983
1984         mutex_lock(&local->chanctx_mtx);
1985
1986         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1987                                         lockdep_is_held(&local->chanctx_mtx));
1988
1989         if (WARN_ON_ONCE(!chanctx_conf))
1990                 goto unlock;
1991
1992         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
1993         ieee80211_recalc_smps_chanctx(local, chanctx);
1994  unlock:
1995         mutex_unlock(&local->chanctx_mtx);
1996 }
1997
1998 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
1999 {
2000         struct ieee80211_local *local = sdata->local;
2001         struct ieee80211_chanctx_conf *chanctx_conf;
2002         struct ieee80211_chanctx *chanctx;
2003
2004         mutex_lock(&local->chanctx_mtx);
2005
2006         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2007                                         lockdep_is_held(&local->chanctx_mtx));
2008
2009         if (WARN_ON_ONCE(!chanctx_conf))
2010                 goto unlock;
2011
2012         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2013         ieee80211_recalc_chanctx_min_def(local, chanctx);
2014  unlock:
2015         mutex_unlock(&local->chanctx_mtx);
2016 }
2017
2018 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2019 {
2020         int i;
2021
2022         for (i = 0; i < n_ids; i++)
2023                 if (ids[i] == id)
2024                         return true;
2025         return false;
2026 }
2027
2028 /**
2029  * ieee80211_ie_split - split an IE buffer according to ordering
2030  *
2031  * @ies: the IE buffer
2032  * @ielen: the length of the IE buffer
2033  * @ids: an array with element IDs that are allowed before
2034  *      the split
2035  * @n_ids: the size of the element ID array
2036  * @offset: offset where to start splitting in the buffer
2037  *
2038  * This function splits an IE buffer by updating the @offset
2039  * variable to point to the location where the buffer should be
2040  * split.
2041  *
2042  * It assumes that the given IE buffer is well-formed, this
2043  * has to be guaranteed by the caller!
2044  *
2045  * It also assumes that the IEs in the buffer are ordered
2046  * correctly, if not the result of using this function will not
2047  * be ordered correctly either, i.e. it does no reordering.
2048  *
2049  * The function returns the offset where the next part of the
2050  * buffer starts, which may be @ielen if the entire (remainder)
2051  * of the buffer should be used.
2052  */
2053 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2054                           const u8 *ids, int n_ids, size_t offset)
2055 {
2056         size_t pos = offset;
2057
2058         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2059                 pos += 2 + ies[pos + 1];
2060
2061         return pos;
2062 }
2063
2064 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2065 {
2066         size_t pos = offset;
2067
2068         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2069                 pos += 2 + ies[pos + 1];
2070
2071         return pos;
2072 }
2073
2074 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2075                                             int rssi_min_thold,
2076                                             int rssi_max_thold)
2077 {
2078         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2079
2080         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2081                 return;
2082
2083         /*
2084          * Scale up threshold values before storing it, as the RSSI averaging
2085          * algorithm uses a scaled up value as well. Change this scaling
2086          * factor if the RSSI averaging algorithm changes.
2087          */
2088         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2089         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2090 }
2091
2092 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2093                                     int rssi_min_thold,
2094                                     int rssi_max_thold)
2095 {
2096         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2097
2098         WARN_ON(rssi_min_thold == rssi_max_thold ||
2099                 rssi_min_thold > rssi_max_thold);
2100
2101         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2102                                        rssi_max_thold);
2103 }
2104 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2105
2106 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2107 {
2108         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2109
2110         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2111 }
2112 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2113
2114 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2115                               u16 cap)
2116 {
2117         __le16 tmp;
2118
2119         *pos++ = WLAN_EID_HT_CAPABILITY;
2120         *pos++ = sizeof(struct ieee80211_ht_cap);
2121         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2122
2123         /* capability flags */
2124         tmp = cpu_to_le16(cap);
2125         memcpy(pos, &tmp, sizeof(u16));
2126         pos += sizeof(u16);
2127
2128         /* AMPDU parameters */
2129         *pos++ = ht_cap->ampdu_factor |
2130                  (ht_cap->ampdu_density <<
2131                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2132
2133         /* MCS set */
2134         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2135         pos += sizeof(ht_cap->mcs);
2136
2137         /* extended capabilities */
2138         pos += sizeof(__le16);
2139
2140         /* BF capabilities */
2141         pos += sizeof(__le32);
2142
2143         /* antenna selection */
2144         pos += sizeof(u8);
2145
2146         return pos;
2147 }
2148
2149 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2150                                u32 cap)
2151 {
2152         __le32 tmp;
2153
2154         *pos++ = WLAN_EID_VHT_CAPABILITY;
2155         *pos++ = sizeof(struct ieee80211_vht_cap);
2156         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2157
2158         /* capability flags */
2159         tmp = cpu_to_le32(cap);
2160         memcpy(pos, &tmp, sizeof(u32));
2161         pos += sizeof(u32);
2162
2163         /* VHT MCS set */
2164         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2165         pos += sizeof(vht_cap->vht_mcs);
2166
2167         return pos;
2168 }
2169
2170 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2171                                const struct cfg80211_chan_def *chandef,
2172                                u16 prot_mode)
2173 {
2174         struct ieee80211_ht_operation *ht_oper;
2175         /* Build HT Information */
2176         *pos++ = WLAN_EID_HT_OPERATION;
2177         *pos++ = sizeof(struct ieee80211_ht_operation);
2178         ht_oper = (struct ieee80211_ht_operation *)pos;
2179         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2180                                         chandef->chan->center_freq);
2181         switch (chandef->width) {
2182         case NL80211_CHAN_WIDTH_160:
2183         case NL80211_CHAN_WIDTH_80P80:
2184         case NL80211_CHAN_WIDTH_80:
2185         case NL80211_CHAN_WIDTH_40:
2186                 if (chandef->center_freq1 > chandef->chan->center_freq)
2187                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2188                 else
2189                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2190                 break;
2191         default:
2192                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2193                 break;
2194         }
2195         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2196             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2197             chandef->width != NL80211_CHAN_WIDTH_20)
2198                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2199
2200         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2201         ht_oper->stbc_param = 0x0000;
2202
2203         /* It seems that Basic MCS set and Supported MCS set
2204            are identical for the first 10 bytes */
2205         memset(&ht_oper->basic_set, 0, 16);
2206         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2207
2208         return pos + sizeof(struct ieee80211_ht_operation);
2209 }
2210
2211 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2212                                   const struct ieee80211_ht_operation *ht_oper,
2213                                   struct cfg80211_chan_def *chandef)
2214 {
2215         enum nl80211_channel_type channel_type;
2216
2217         if (!ht_oper) {
2218                 cfg80211_chandef_create(chandef, control_chan,
2219                                         NL80211_CHAN_NO_HT);
2220                 return;
2221         }
2222
2223         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2224         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2225                 channel_type = NL80211_CHAN_HT20;
2226                 break;
2227         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2228                 channel_type = NL80211_CHAN_HT40PLUS;
2229                 break;
2230         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2231                 channel_type = NL80211_CHAN_HT40MINUS;
2232                 break;
2233         default:
2234                 channel_type = NL80211_CHAN_NO_HT;
2235         }
2236
2237         cfg80211_chandef_create(chandef, control_chan, channel_type);
2238 }
2239
2240 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2241                              const struct ieee80211_supported_band *sband,
2242                              const u8 *srates, int srates_len, u32 *rates)
2243 {
2244         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2245         int shift = ieee80211_chandef_get_shift(chandef);
2246         struct ieee80211_rate *br;
2247         int brate, rate, i, j, count = 0;
2248
2249         *rates = 0;
2250
2251         for (i = 0; i < srates_len; i++) {
2252                 rate = srates[i] & 0x7f;
2253
2254                 for (j = 0; j < sband->n_bitrates; j++) {
2255                         br = &sband->bitrates[j];
2256                         if ((rate_flags & br->flags) != rate_flags)
2257                                 continue;
2258
2259                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2260                         if (brate == rate) {
2261                                 *rates |= BIT(j);
2262                                 count++;
2263                                 break;
2264                         }
2265                 }
2266         }
2267         return count;
2268 }
2269
2270 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2271                             struct sk_buff *skb, bool need_basic,
2272                             enum ieee80211_band band)
2273 {
2274         struct ieee80211_local *local = sdata->local;
2275         struct ieee80211_supported_band *sband;
2276         int rate, shift;
2277         u8 i, rates, *pos;
2278         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2279         u32 rate_flags;
2280
2281         shift = ieee80211_vif_get_shift(&sdata->vif);
2282         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2283         sband = local->hw.wiphy->bands[band];
2284         rates = 0;
2285         for (i = 0; i < sband->n_bitrates; i++) {
2286                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2287                         continue;
2288                 rates++;
2289         }
2290         if (rates > 8)
2291                 rates = 8;
2292
2293         if (skb_tailroom(skb) < rates + 2)
2294                 return -ENOMEM;
2295
2296         pos = skb_put(skb, rates + 2);
2297         *pos++ = WLAN_EID_SUPP_RATES;
2298         *pos++ = rates;
2299         for (i = 0; i < rates; i++) {
2300                 u8 basic = 0;
2301                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2302                         continue;
2303
2304                 if (need_basic && basic_rates & BIT(i))
2305                         basic = 0x80;
2306                 rate = sband->bitrates[i].bitrate;
2307                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2308                                     5 * (1 << shift));
2309                 *pos++ = basic | (u8) rate;
2310         }
2311
2312         return 0;
2313 }
2314
2315 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2316                                 struct sk_buff *skb, bool need_basic,
2317                                 enum ieee80211_band band)
2318 {
2319         struct ieee80211_local *local = sdata->local;
2320         struct ieee80211_supported_band *sband;
2321         int rate, shift;
2322         u8 i, exrates, *pos;
2323         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2324         u32 rate_flags;
2325
2326         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2327         shift = ieee80211_vif_get_shift(&sdata->vif);
2328
2329         sband = local->hw.wiphy->bands[band];
2330         exrates = 0;
2331         for (i = 0; i < sband->n_bitrates; i++) {
2332                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2333                         continue;
2334                 exrates++;
2335         }
2336
2337         if (exrates > 8)
2338                 exrates -= 8;
2339         else
2340                 exrates = 0;
2341
2342         if (skb_tailroom(skb) < exrates + 2)
2343                 return -ENOMEM;
2344
2345         if (exrates) {
2346                 pos = skb_put(skb, exrates + 2);
2347                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2348                 *pos++ = exrates;
2349                 for (i = 8; i < sband->n_bitrates; i++) {
2350                         u8 basic = 0;
2351                         if ((rate_flags & sband->bitrates[i].flags)
2352                             != rate_flags)
2353                                 continue;
2354                         if (need_basic && basic_rates & BIT(i))
2355                                 basic = 0x80;
2356                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2357                                             5 * (1 << shift));
2358                         *pos++ = basic | (u8) rate;
2359                 }
2360         }
2361         return 0;
2362 }
2363
2364 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2365 {
2366         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2367         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2368
2369         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2370                 /* non-managed type inferfaces */
2371                 return 0;
2372         }
2373         return ifmgd->ave_beacon_signal / 16;
2374 }
2375 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2376
2377 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2378 {
2379         if (!mcs)
2380                 return 1;
2381
2382         /* TODO: consider rx_highest */
2383
2384         if (mcs->rx_mask[3])
2385                 return 4;
2386         if (mcs->rx_mask[2])
2387                 return 3;
2388         if (mcs->rx_mask[1])
2389                 return 2;
2390         return 1;
2391 }
2392
2393 /**
2394  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2395  * @local: mac80211 hw info struct
2396  * @status: RX status
2397  * @mpdu_len: total MPDU length (including FCS)
2398  * @mpdu_offset: offset into MPDU to calculate timestamp at
2399  *
2400  * This function calculates the RX timestamp at the given MPDU offset, taking
2401  * into account what the RX timestamp was. An offset of 0 will just normalize
2402  * the timestamp to TSF at beginning of MPDU reception.
2403  */
2404 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2405                                      struct ieee80211_rx_status *status,
2406                                      unsigned int mpdu_len,
2407                                      unsigned int mpdu_offset)
2408 {
2409         u64 ts = status->mactime;
2410         struct rate_info ri;
2411         u16 rate;
2412
2413         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2414                 return 0;
2415
2416         memset(&ri, 0, sizeof(ri));
2417
2418         /* Fill cfg80211 rate info */
2419         if (status->flag & RX_FLAG_HT) {
2420                 ri.mcs = status->rate_idx;
2421                 ri.flags |= RATE_INFO_FLAGS_MCS;
2422                 if (status->flag & RX_FLAG_40MHZ)
2423                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2424                 if (status->flag & RX_FLAG_SHORT_GI)
2425                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2426         } else if (status->flag & RX_FLAG_VHT) {
2427                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2428                 ri.mcs = status->rate_idx;
2429                 ri.nss = status->vht_nss;
2430                 if (status->flag & RX_FLAG_40MHZ)
2431                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2432                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2433                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2434                 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2435                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2436                 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2437                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2438                 if (status->flag & RX_FLAG_SHORT_GI)
2439                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2440         } else {
2441                 struct ieee80211_supported_band *sband;
2442                 int shift = 0;
2443                 int bitrate;
2444
2445                 if (status->flag & RX_FLAG_10MHZ)
2446                         shift = 1;
2447                 if (status->flag & RX_FLAG_5MHZ)
2448                         shift = 2;
2449
2450                 sband = local->hw.wiphy->bands[status->band];
2451                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2452                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2453         }
2454
2455         rate = cfg80211_calculate_bitrate(&ri);
2456         if (WARN_ONCE(!rate,
2457                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2458                       status->flag, status->rate_idx, status->vht_nss))
2459                 return 0;
2460
2461         /* rewind from end of MPDU */
2462         if (status->flag & RX_FLAG_MACTIME_END)
2463                 ts -= mpdu_len * 8 * 10 / rate;
2464
2465         ts += mpdu_offset * 8 * 10 / rate;
2466
2467         return ts;
2468 }
2469
2470 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2471 {
2472         struct ieee80211_sub_if_data *sdata;
2473         struct cfg80211_chan_def chandef;
2474
2475         mutex_lock(&local->mtx);
2476         mutex_lock(&local->iflist_mtx);
2477         list_for_each_entry(sdata, &local->interfaces, list) {
2478                 /* it might be waiting for the local->mtx, but then
2479                  * by the time it gets it, sdata->wdev.cac_started
2480                  * will no longer be true
2481                  */
2482                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2483
2484                 if (sdata->wdev.cac_started) {
2485                         chandef = sdata->vif.bss_conf.chandef;
2486                         ieee80211_vif_release_channel(sdata);
2487                         cfg80211_cac_event(sdata->dev,
2488                                            &chandef,
2489                                            NL80211_RADAR_CAC_ABORTED,
2490                                            GFP_KERNEL);
2491                 }
2492         }
2493         mutex_unlock(&local->iflist_mtx);
2494         mutex_unlock(&local->mtx);
2495 }
2496
2497 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2498 {
2499         struct ieee80211_local *local =
2500                 container_of(work, struct ieee80211_local, radar_detected_work);
2501         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2502
2503         ieee80211_dfs_cac_cancel(local);
2504
2505         if (local->use_chanctx)
2506                 /* currently not handled */
2507                 WARN_ON(1);
2508         else
2509                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2510 }
2511
2512 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2513 {
2514         struct ieee80211_local *local = hw_to_local(hw);
2515
2516         trace_api_radar_detected(local);
2517
2518         ieee80211_queue_work(hw, &local->radar_detected_work);
2519 }
2520 EXPORT_SYMBOL(ieee80211_radar_detected);
2521
2522 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2523 {
2524         u32 ret;
2525         int tmp;
2526
2527         switch (c->width) {
2528         case NL80211_CHAN_WIDTH_20:
2529                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2530                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2531                 break;
2532         case NL80211_CHAN_WIDTH_40:
2533                 c->width = NL80211_CHAN_WIDTH_20;
2534                 c->center_freq1 = c->chan->center_freq;
2535                 ret = IEEE80211_STA_DISABLE_40MHZ |
2536                       IEEE80211_STA_DISABLE_VHT;
2537                 break;
2538         case NL80211_CHAN_WIDTH_80:
2539                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2540                 /* n_P40 */
2541                 tmp /= 2;
2542                 /* freq_P40 */
2543                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2544                 c->width = NL80211_CHAN_WIDTH_40;
2545                 ret = IEEE80211_STA_DISABLE_VHT;
2546                 break;
2547         case NL80211_CHAN_WIDTH_80P80:
2548                 c->center_freq2 = 0;
2549                 c->width = NL80211_CHAN_WIDTH_80;
2550                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2551                       IEEE80211_STA_DISABLE_160MHZ;
2552                 break;
2553         case NL80211_CHAN_WIDTH_160:
2554                 /* n_P20 */
2555                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2556                 /* n_P80 */
2557                 tmp /= 4;
2558                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2559                 c->width = NL80211_CHAN_WIDTH_80;
2560                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2561                       IEEE80211_STA_DISABLE_160MHZ;
2562                 break;
2563         default:
2564         case NL80211_CHAN_WIDTH_20_NOHT:
2565                 WARN_ON_ONCE(1);
2566                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2567                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2568                 break;
2569         case NL80211_CHAN_WIDTH_5:
2570         case NL80211_CHAN_WIDTH_10:
2571                 WARN_ON_ONCE(1);
2572                 /* keep c->width */
2573                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2574                 break;
2575         }
2576
2577         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2578
2579         return ret;
2580 }
2581
2582 /*
2583  * Returns true if smps_mode_new is strictly more restrictive than
2584  * smps_mode_old.
2585  */
2586 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2587                                    enum ieee80211_smps_mode smps_mode_new)
2588 {
2589         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2590                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2591                 return false;
2592
2593         switch (smps_mode_old) {
2594         case IEEE80211_SMPS_STATIC:
2595                 return false;
2596         case IEEE80211_SMPS_DYNAMIC:
2597                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2598         case IEEE80211_SMPS_OFF:
2599                 return smps_mode_new != IEEE80211_SMPS_OFF;
2600         default:
2601                 WARN_ON(1);
2602         }
2603
2604         return false;
2605 }
2606
2607 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2608                               struct cfg80211_csa_settings *csa_settings)
2609 {
2610         struct sk_buff *skb;
2611         struct ieee80211_mgmt *mgmt;
2612         struct ieee80211_local *local = sdata->local;
2613         int freq;
2614         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2615                                sizeof(mgmt->u.action.u.chan_switch);
2616         u8 *pos;
2617
2618         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2619             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2620                 return -EOPNOTSUPP;
2621
2622         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2623                             5 + /* channel switch announcement element */
2624                             3 + /* secondary channel offset element */
2625                             8); /* mesh channel switch parameters element */
2626         if (!skb)
2627                 return -ENOMEM;
2628
2629         skb_reserve(skb, local->tx_headroom);
2630         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2631         memset(mgmt, 0, hdr_len);
2632         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2633                                           IEEE80211_STYPE_ACTION);
2634
2635         eth_broadcast_addr(mgmt->da);
2636         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2637         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2638                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2639         } else {
2640                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2641                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2642         }
2643         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2644         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2645         pos = skb_put(skb, 5);
2646         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2647         *pos++ = 3;                                             /* IE length */
2648         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2649         freq = csa_settings->chandef.chan->center_freq;
2650         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2651         *pos++ = csa_settings->count;                           /* count */
2652
2653         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2654                 enum nl80211_channel_type ch_type;
2655
2656                 skb_put(skb, 3);
2657                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2658                 *pos++ = 1;                                     /* IE length */
2659                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2660                 if (ch_type == NL80211_CHAN_HT40PLUS)
2661                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2662                 else
2663                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2664         }
2665
2666         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2667                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2668
2669                 skb_put(skb, 8);
2670                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2671                 *pos++ = 6;                                     /* IE length */
2672                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2673                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2674                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2675                 *pos++ |= csa_settings->block_tx ?
2676                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2677                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2678                 pos += 2;
2679                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2680                 pos += 2;
2681         }
2682
2683         ieee80211_tx_skb(sdata, skb);
2684         return 0;
2685 }
2686
2687 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2688 {
2689         return !(cs == NULL || cs->cipher == 0 ||
2690                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2691                  cs->hdr_len <= cs->key_idx_off ||
2692                  cs->key_idx_shift > 7 ||
2693                  cs->key_idx_mask == 0);
2694 }
2695
2696 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2697 {
2698         int i;
2699
2700         /* Ensure we have enough iftype bitmap space for all iftype values */
2701         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2702
2703         for (i = 0; i < n; i++)
2704                 if (!ieee80211_cs_valid(&cs[i]))
2705                         return false;
2706
2707         return true;
2708 }
2709
2710 const struct ieee80211_cipher_scheme *
2711 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2712                  enum nl80211_iftype iftype)
2713 {
2714         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2715         int n = local->hw.n_cipher_schemes;
2716         int i;
2717         const struct ieee80211_cipher_scheme *cs = NULL;
2718
2719         for (i = 0; i < n; i++) {
2720                 if (l[i].cipher == cipher) {
2721                         cs = &l[i];
2722                         break;
2723                 }
2724         }
2725
2726         if (!cs || !(cs->iftype & BIT(iftype)))
2727                 return NULL;
2728
2729         return cs;
2730 }
2731
2732 int ieee80211_cs_headroom(struct ieee80211_local *local,
2733                           struct cfg80211_crypto_settings *crypto,
2734                           enum nl80211_iftype iftype)
2735 {
2736         const struct ieee80211_cipher_scheme *cs;
2737         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2738         int i;
2739
2740         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2741                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2742                                       iftype);
2743
2744                 if (cs && headroom < cs->hdr_len)
2745                         headroom = cs->hdr_len;
2746         }
2747
2748         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2749         if (cs && headroom < cs->hdr_len)
2750                 headroom = cs->hdr_len;
2751
2752         return headroom;
2753 }
2754
2755 static bool
2756 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2757 {
2758         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2759         int skip;
2760
2761         if (end > 0)
2762                 return false;
2763
2764         /* End time is in the past, check for repetitions */
2765         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2766         if (data->count[i] < 255) {
2767                 if (data->count[i] <= skip) {
2768                         data->count[i] = 0;
2769                         return false;
2770                 }
2771
2772                 data->count[i] -= skip;
2773         }
2774
2775         data->desc[i].start += skip * data->desc[i].interval;
2776
2777         return true;
2778 }
2779
2780 static bool
2781 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2782                              s32 *offset)
2783 {
2784         bool ret = false;
2785         int i;
2786
2787         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2788                 s32 cur;
2789
2790                 if (!data->count[i])
2791                         continue;
2792
2793                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2794                         ret = true;
2795
2796                 cur = data->desc[i].start - tsf;
2797                 if (cur > *offset)
2798                         continue;
2799
2800                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2801                 if (cur > *offset)
2802                         *offset = cur;
2803         }
2804
2805         return ret;
2806 }
2807
2808 static u32
2809 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2810 {
2811         s32 offset = 0;
2812         int tries = 0;
2813         /*
2814          * arbitrary limit, used to avoid infinite loops when combined NoA
2815          * descriptors cover the full time period.
2816          */
2817         int max_tries = 5;
2818
2819         ieee80211_extend_absent_time(data, tsf, &offset);
2820         do {
2821                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2822                         break;
2823
2824                 tries++;
2825         } while (tries < max_tries);
2826
2827         return offset;
2828 }
2829
2830 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2831 {
2832         u32 next_offset = BIT(31) - 1;
2833         int i;
2834
2835         data->absent = 0;
2836         data->has_next_tsf = false;
2837         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2838                 s32 start;
2839
2840                 if (!data->count[i])
2841                         continue;
2842
2843                 ieee80211_extend_noa_desc(data, tsf, i);
2844                 start = data->desc[i].start - tsf;
2845                 if (start <= 0)
2846                         data->absent |= BIT(i);
2847
2848                 if (next_offset > start)
2849                         next_offset = start;
2850
2851                 data->has_next_tsf = true;
2852         }
2853
2854         if (data->absent)
2855                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2856
2857         data->next_tsf = tsf + next_offset;
2858 }
2859 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2860
2861 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2862                             struct ieee80211_noa_data *data, u32 tsf)
2863 {
2864         int ret = 0;
2865         int i;
2866
2867         memset(data, 0, sizeof(*data));
2868
2869         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2870                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2871
2872                 if (!desc->count || !desc->duration)
2873                         continue;
2874
2875                 data->count[i] = desc->count;
2876                 data->desc[i].start = le32_to_cpu(desc->start_time);
2877                 data->desc[i].duration = le32_to_cpu(desc->duration);
2878                 data->desc[i].interval = le32_to_cpu(desc->interval);
2879
2880                 if (data->count[i] > 1 &&
2881                     data->desc[i].interval < data->desc[i].duration)
2882                         continue;
2883
2884                 ieee80211_extend_noa_desc(data, tsf, i);
2885                 ret++;
2886         }
2887
2888         if (ret)
2889                 ieee80211_update_p2p_noa(data, tsf);
2890
2891         return ret;
2892 }
2893 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2894
2895 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2896                            struct ieee80211_sub_if_data *sdata)
2897 {
2898         u64 tsf = drv_get_tsf(local, sdata);
2899         u64 dtim_count = 0;
2900         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2901         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2902         struct ps_data *ps;
2903         u8 bcns_from_dtim;
2904
2905         if (tsf == -1ULL || !beacon_int || !dtim_period)
2906                 return;
2907
2908         if (sdata->vif.type == NL80211_IFTYPE_AP ||
2909             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2910                 if (!sdata->bss)
2911                         return;
2912
2913                 ps = &sdata->bss->ps;
2914         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2915                 ps = &sdata->u.mesh.ps;
2916         } else {
2917                 return;
2918         }
2919
2920         /*
2921          * actually finds last dtim_count, mac80211 will update in
2922          * __beacon_add_tim().
2923          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2924          */
2925         do_div(tsf, beacon_int);
2926         bcns_from_dtim = do_div(tsf, dtim_period);
2927         /* just had a DTIM */
2928         if (!bcns_from_dtim)
2929                 dtim_count = 0;
2930         else
2931                 dtim_count = dtim_period - bcns_from_dtim;
2932
2933         ps->dtim_count = dtim_count;
2934 }
2935
2936 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
2937                                          struct ieee80211_chanctx *ctx)
2938 {
2939         struct ieee80211_sub_if_data *sdata;
2940         u8 radar_detect = 0;
2941
2942         lockdep_assert_held(&local->chanctx_mtx);
2943
2944         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
2945                 return 0;
2946
2947         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
2948                 if (sdata->reserved_radar_required)
2949                         radar_detect |= BIT(sdata->reserved_chandef.width);
2950
2951         /*
2952          * An in-place reservation context should not have any assigned vifs
2953          * until it replaces the other context.
2954          */
2955         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
2956                 !list_empty(&ctx->assigned_vifs));
2957
2958         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
2959                 if (sdata->radar_required)
2960                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
2961
2962         return radar_detect;
2963 }
2964
2965 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2966                                  const struct cfg80211_chan_def *chandef,
2967                                  enum ieee80211_chanctx_mode chanmode,
2968                                  u8 radar_detect)
2969 {
2970         struct ieee80211_local *local = sdata->local;
2971         struct ieee80211_sub_if_data *sdata_iter;
2972         enum nl80211_iftype iftype = sdata->wdev.iftype;
2973         int num[NUM_NL80211_IFTYPES];
2974         struct ieee80211_chanctx *ctx;
2975         int num_different_channels = 0;
2976         int total = 1;
2977
2978         lockdep_assert_held(&local->chanctx_mtx);
2979
2980         if (WARN_ON(hweight32(radar_detect) > 1))
2981                 return -EINVAL;
2982
2983         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
2984                     !chandef->chan))
2985                 return -EINVAL;
2986
2987         if (chandef)
2988                 num_different_channels = 1;
2989
2990         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
2991                 return -EINVAL;
2992
2993         /* Always allow software iftypes */
2994         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
2995                 if (radar_detect)
2996                         return -EINVAL;
2997                 return 0;
2998         }
2999
3000         memset(num, 0, sizeof(num));
3001
3002         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3003                 num[iftype] = 1;
3004
3005         list_for_each_entry(ctx, &local->chanctx_list, list) {
3006                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3007                         continue;
3008                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3009                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3010                         num_different_channels++;
3011                         continue;
3012                 }
3013                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3014                     cfg80211_chandef_compatible(chandef,
3015                                                 &ctx->conf.def))
3016                         continue;
3017                 num_different_channels++;
3018         }
3019
3020         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3021                 struct wireless_dev *wdev_iter;
3022
3023                 wdev_iter = &sdata_iter->wdev;
3024
3025                 if (sdata_iter == sdata ||
3026                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3027                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3028                         continue;
3029
3030                 num[wdev_iter->iftype]++;
3031                 total++;
3032         }
3033
3034         if (total == 1 && !radar_detect)
3035                 return 0;
3036
3037         return cfg80211_check_combinations(local->hw.wiphy,
3038                                            num_different_channels,
3039                                            radar_detect, num);
3040 }
3041
3042 static void
3043 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3044                          void *data)
3045 {
3046         u32 *max_num_different_channels = data;
3047
3048         *max_num_different_channels = max(*max_num_different_channels,
3049                                           c->num_different_channels);
3050 }
3051
3052 int ieee80211_max_num_channels(struct ieee80211_local *local)
3053 {
3054         struct ieee80211_sub_if_data *sdata;
3055         int num[NUM_NL80211_IFTYPES] = {};
3056         struct ieee80211_chanctx *ctx;
3057         int num_different_channels = 0;
3058         u8 radar_detect = 0;
3059         u32 max_num_different_channels = 1;
3060         int err;
3061
3062         lockdep_assert_held(&local->chanctx_mtx);
3063
3064         list_for_each_entry(ctx, &local->chanctx_list, list) {
3065                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3066                         continue;
3067
3068                 num_different_channels++;
3069
3070                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3071         }
3072
3073         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3074                 num[sdata->wdev.iftype]++;
3075
3076         err = cfg80211_iter_combinations(local->hw.wiphy,
3077                                          num_different_channels, radar_detect,
3078                                          num, ieee80211_iter_max_chans,
3079                                          &max_num_different_channels);
3080         if (err < 0)
3081                 return err;
3082
3083         return max_num_different_channels;
3084 }
3085
3086 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3087 {
3088         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3089         *buf++ = 7; /* len */
3090         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3091         *buf++ = 0x50;
3092         *buf++ = 0xf2;
3093         *buf++ = 2; /* WME */
3094         *buf++ = 0; /* WME info */
3095         *buf++ = 1; /* WME ver */
3096         *buf++ = qosinfo; /* U-APSD no in use */
3097
3098         return buf;
3099 }