net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * utilities for mac80211
  13  */
  14
  15 #include <net/mac80211.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/export.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/bitmap.h>
  24 #include <linux/crc32.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/rtnetlink.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43         BUG_ON(!wiphy);
  44
  45         local = wiphy_priv(wiphy);
  46         return &local->hw;
  47 }
  48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  49
  50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  51                         enum nl80211_iftype type)
  52 {
  53         __le16 fc = hdr->frame_control;
  54
  55          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
  56         if (len < 16)
  57                 return NULL;
  58
  59         if (ieee80211_is_data(fc)) {
  60                 if (len < 24) /* drop incorrect hdr len (data) */
  61                         return NULL;
  62
  63                 if (ieee80211_has_a4(fc))
  64                         return NULL;
  65                 if (ieee80211_has_tods(fc))
  66                         return hdr->addr1;
  67                 if (ieee80211_has_fromds(fc))
  68                         return hdr->addr2;
  69
  70                 return hdr->addr3;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98
  99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 100 {
 101         struct sk_buff *skb;
 102         struct ieee80211_hdr *hdr;
 103
 104         skb_queue_walk(&tx->skbs, skb) {
 105                 hdr = (struct ieee80211_hdr *) skb->data;
 106                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 107         }
 108 }
 109
 110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
 111                              int rate, int erp, int short_preamble,
 112                              int shift)
 113 {
 114         int dur;
 115
 116         /* calculate duration (in microseconds, rounded up to next higher
 117          * integer if it includes a fractional microsecond) to send frame of
 118          * len bytes (does not include FCS) at the given rate. Duration will
 119          * also include SIFS.
 120          *
 121          * rate is in 100 kbps, so divident is multiplied by 10 in the
 122          * DIV_ROUND_UP() operations.
 123          *
 124          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 125          * is assumed to be 0 otherwise.
 126          */
 127
 128         if (band == IEEE80211_BAND_5GHZ || erp) {
 129                 /*
 130                  * OFDM:
 131                  *
 132                  * N_DBPS = DATARATE x 4
 133                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 134                  *      (16 = SIGNAL time, 6 = tail bits)
 135                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 136                  *
 137                  * T_SYM = 4 usec
 138                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 139                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 140                  *      signal ext = 6 usec
 141                  */
 142                 dur = 16; /* SIFS + signal ext */
 143                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 144                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 145
 146                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 147                  *  * times 4 for 5 MHz
 148                  *  * times 2 for 10 MHz
 149                  */
 150                 dur *= 1 << shift;
 151
 152                 /* rates should already consider the channel bandwidth,
 153                  * don't apply divisor again.
 154                  */
 155                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 156                                         4 * rate); /* T_SYM x N_SYM */
 157         } else {
 158                 /*
 159                  * 802.11b or 802.11g with 802.11b compatibility:
 160                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 161                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 162                  *
 163                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 164                  * aSIFSTime = 10 usec
 165                  * aPreambleLength = 144 usec or 72 usec with short preamble
 166                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 167                  */
 168                 dur = 10; /* aSIFSTime = 10 usec */
 169                 dur += short_preamble ? (72 + 24) : (144 + 48);
 170
 171                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 172         }
 173
 174         return dur;
 175 }
 176
 177 /* Exported duration function for driver use */
 178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 179                                         struct ieee80211_vif *vif,
 180                                         enum ieee80211_band band,
 181                                         size_t frame_len,
 182                                         struct ieee80211_rate *rate)
 183 {
 184         struct ieee80211_sub_if_data *sdata;
 185         u16 dur;
 186         int erp, shift = 0;
 187         bool short_preamble = false;
 188
 189         erp = 0;
 190         if (vif) {
 191                 sdata = vif_to_sdata(vif);
 192                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 193                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 194                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 195                 shift = ieee80211_vif_get_shift(vif);
 196         }
 197
 198         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 199                                        short_preamble, shift);
 200
 201         return cpu_to_le16(dur);
 202 }
 203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 204
 205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 206                               struct ieee80211_vif *vif, size_t frame_len,
 207                               const struct ieee80211_tx_info *frame_txctl)
 208 {
 209         struct ieee80211_local *local = hw_to_local(hw);
 210         struct ieee80211_rate *rate;
 211         struct ieee80211_sub_if_data *sdata;
 212         bool short_preamble;
 213         int erp, shift = 0, bitrate;
 214         u16 dur;
 215         struct ieee80211_supported_band *sband;
 216
 217         sband = local->hw.wiphy->bands[frame_txctl->band];
 218
 219         short_preamble = false;
 220
 221         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 222
 223         erp = 0;
 224         if (vif) {
 225                 sdata = vif_to_sdata(vif);
 226                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 227                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 228                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 229                 shift = ieee80211_vif_get_shift(vif);
 230         }
 231
 232         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 233
 234         /* CTS duration */
 235         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                        erp, short_preamble, shift);
 237         /* Data frame duration */
 238         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 239                                         erp, short_preamble, shift);
 240         /* ACK duration */
 241         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 242                                         erp, short_preamble, shift);
 243
 244         return cpu_to_le16(dur);
 245 }
 246 EXPORT_SYMBOL(ieee80211_rts_duration);
 247
 248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 249                                     struct ieee80211_vif *vif,
 250                                     size_t frame_len,
 251                                     const struct ieee80211_tx_info *frame_txctl)
 252 {
 253         struct ieee80211_local *local = hw_to_local(hw);
 254         struct ieee80211_rate *rate;
 255         struct ieee80211_sub_if_data *sdata;
 256         bool short_preamble;
 257         int erp, shift = 0, bitrate;
 258         u16 dur;
 259         struct ieee80211_supported_band *sband;
 260
 261         sband = local->hw.wiphy->bands[frame_txctl->band];
 262
 263         short_preamble = false;
 264
 265         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 266         erp = 0;
 267         if (vif) {
 268                 sdata = vif_to_sdata(vif);
 269                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 270                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 271                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 272                 shift = ieee80211_vif_get_shift(vif);
 273         }
 274
 275         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 276
 277         /* Data frame duration */
 278         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 279                                        erp, short_preamble, shift);
 280         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 281                 /* ACK duration */
 282                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 283                                                 erp, short_preamble, shift);
 284         }
 285
 286         return cpu_to_le16(dur);
 287 }
 288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 289
 290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 291 {
 292         struct ieee80211_sub_if_data *sdata;
 293         int n_acs = IEEE80211_NUM_ACS;
 294
 295         if (local->hw.queues < IEEE80211_NUM_ACS)
 296                 n_acs = 1;
 297
 298         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 299                 int ac;
 300
 301                 if (!sdata->dev)
 302                         continue;
 303
 304                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 305                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 306                         continue;
 307
 308                 for (ac = 0; ac < n_acs; ac++) {
 309                         int ac_queue = sdata->vif.hw_queue[ac];
 310
 311                         if (local->ops->wake_tx_queue &&
 312                             (atomic_read(&sdata->txqs_len[ac]) >
 313                              local->hw.txq_ac_max_pending))
 314                                 continue;
 315
 316                         if (ac_queue == queue ||
 317                             (sdata->vif.cab_queue == queue &&
 318                              local->queue_stop_reasons[ac_queue] == 0 &&
 319                              skb_queue_empty(&local->pending[ac_queue])))
 320                                 netif_wake_subqueue(sdata->dev, ac);
 321                 }
 322         }
 323 }
 324
 325 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 326                                    enum queue_stop_reason reason,
 327                                    bool refcounted)
 328 {
 329         struct ieee80211_local *local = hw_to_local(hw);
 330
 331         trace_wake_queue(local, queue, reason);
 332
 333         if (WARN_ON(queue >= hw->queues))
 334                 return;
 335
 336         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 337                 return;
 338
 339         if (!refcounted)
 340                 local->q_stop_reasons[queue][reason] = 0;
 341         else
 342                 local->q_stop_reasons[queue][reason]--;
 343
 344         if (local->q_stop_reasons[queue][reason] == 0)
 345                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 346
 347         if (local->queue_stop_reasons[queue] != 0)
 348                 /* someone still has this queue stopped */
 349                 return;
 350
 351         if (skb_queue_empty(&local->pending[queue])) {
 352                 rcu_read_lock();
 353                 ieee80211_propagate_queue_wake(local, queue);
 354                 rcu_read_unlock();
 355         } else
 356                 tasklet_schedule(&local->tx_pending_tasklet);
 357 }
 358
 359 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 360                                     enum queue_stop_reason reason,
 361                                     bool refcounted)
 362 {
 363         struct ieee80211_local *local = hw_to_local(hw);
 364         unsigned long flags;
 365
 366         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 367         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 368         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 369 }
 370
 371 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 372 {
 373         ieee80211_wake_queue_by_reason(hw, queue,
 374                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 375                                        false);
 376 }
 377 EXPORT_SYMBOL(ieee80211_wake_queue);
 378
 379 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 380                                    enum queue_stop_reason reason,
 381                                    bool refcounted)
 382 {
 383         struct ieee80211_local *local = hw_to_local(hw);
 384         struct ieee80211_sub_if_data *sdata;
 385         int n_acs = IEEE80211_NUM_ACS;
 386
 387         trace_stop_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!refcounted)
 393                 local->q_stop_reasons[queue][reason] = 1;
 394         else
 395                 local->q_stop_reasons[queue][reason]++;
 396
 397         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 398                 return;
 399
 400         if (local->hw.queues < IEEE80211_NUM_ACS)
 401                 n_acs = 1;
 402
 403         rcu_read_lock();
 404         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 405                 int ac;
 406
 407                 if (!sdata->dev)
 408                         continue;
 409
 410                 for (ac = 0; ac < n_acs; ac++) {
 411                         if (sdata->vif.hw_queue[ac] == queue ||
 412                             sdata->vif.cab_queue == queue)
 413                                 netif_stop_subqueue(sdata->dev, ac);
 414                 }
 415         }
 416         rcu_read_unlock();
 417 }
 418
 419 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 420                                     enum queue_stop_reason reason,
 421                                     bool refcounted)
 422 {
 423         struct ieee80211_local *local = hw_to_local(hw);
 424         unsigned long flags;
 425
 426         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 427         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 428         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 429 }
 430
 431 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 432 {
 433         ieee80211_stop_queue_by_reason(hw, queue,
 434                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 435                                        false);
 436 }
 437 EXPORT_SYMBOL(ieee80211_stop_queue);
 438
 439 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 440                                struct sk_buff *skb)
 441 {
 442         struct ieee80211_hw *hw = &local->hw;
 443         unsigned long flags;
 444         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 445         int queue = info->hw_queue;
 446
 447         if (WARN_ON(!info->control.vif)) {
 448                 ieee80211_free_txskb(&local->hw, skb);
 449                 return;
 450         }
 451
 452         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 453         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 454                                false);
 455         __skb_queue_tail(&local->pending[queue], skb);
 456         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 457                                false);
 458         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 459 }
 460
 461 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 462                                 struct sk_buff_head *skbs)
 463 {
 464         struct ieee80211_hw *hw = &local->hw;
 465         struct sk_buff *skb;
 466         unsigned long flags;
 467         int queue, i;
 468
 469         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 470         while ((skb = skb_dequeue(skbs))) {
 471                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 472
 473                 if (WARN_ON(!info->control.vif)) {
 474                         ieee80211_free_txskb(&local->hw, skb);
 475                         continue;
 476                 }
 477
 478                 queue = info->hw_queue;
 479
 480                 __ieee80211_stop_queue(hw, queue,
 481                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 482                                 false);
 483
 484                 __skb_queue_tail(&local->pending[queue], skb);
 485         }
 486
 487         for (i = 0; i < hw->queues; i++)
 488                 __ieee80211_wake_queue(hw, i,
 489                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 490                         false);
 491         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 492 }
 493
 494 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 495                                      unsigned long queues,
 496                                      enum queue_stop_reason reason,
 497                                      bool refcounted)
 498 {
 499         struct ieee80211_local *local = hw_to_local(hw);
 500         unsigned long flags;
 501         int i;
 502
 503         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 504
 505         for_each_set_bit(i, &queues, hw->queues)
 506                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 507
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 512 {
 513         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 514                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                         false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queues);
 518
 519 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 520 {
 521         struct ieee80211_local *local = hw_to_local(hw);
 522         unsigned long flags;
 523         int ret;
 524
 525         if (WARN_ON(queue >= hw->queues))
 526                 return true;
 527
 528         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 529         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 530                        &local->queue_stop_reasons[queue]);
 531         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 532         return ret;
 533 }
 534 EXPORT_SYMBOL(ieee80211_queue_stopped);
 535
 536 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 537                                      unsigned long queues,
 538                                      enum queue_stop_reason reason,
 539                                      bool refcounted)
 540 {
 541         struct ieee80211_local *local = hw_to_local(hw);
 542         unsigned long flags;
 543         int i;
 544
 545         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 546
 547         for_each_set_bit(i, &queues, hw->queues)
 548                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 549
 550         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 551 }
 552
 553 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 554 {
 555         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 556                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 557                                         false);
 558 }
 559 EXPORT_SYMBOL(ieee80211_wake_queues);
 560
 561 static unsigned int
 562 ieee80211_get_vif_queues(struct ieee80211_local *local,
 563                          struct ieee80211_sub_if_data *sdata)
 564 {
 565         unsigned int queues;
 566
 567         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 568                 int ac;
 569
 570                 queues = 0;
 571
 572                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 573                         queues |= BIT(sdata->vif.hw_queue[ac]);
 574                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 575                         queues |= BIT(sdata->vif.cab_queue);
 576         } else {
 577                 /* all queues */
 578                 queues = BIT(local->hw.queues) - 1;
 579         }
 580
 581         return queues;
 582 }
 583
 584 void __ieee80211_flush_queues(struct ieee80211_local *local,
 585                               struct ieee80211_sub_if_data *sdata,
 586                               unsigned int queues, bool drop)
 587 {
 588         if (!local->ops->flush)
 589                 return;
 590
 591         /*
 592          * If no queue was set, or if the HW doesn't support
 593          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 594          */
 595         if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
 596                 queues = ieee80211_get_vif_queues(local, sdata);
 597
 598         ieee80211_stop_queues_by_reason(&local->hw, queues,
 599                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 600                                         false);
 601
 602         drv_flush(local, sdata, queues, drop);
 603
 604         ieee80211_wake_queues_by_reason(&local->hw, queues,
 605                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 606                                         false);
 607 }
 608
 609 void ieee80211_flush_queues(struct ieee80211_local *local,
 610                             struct ieee80211_sub_if_data *sdata, bool drop)
 611 {
 612         __ieee80211_flush_queues(local, sdata, 0, drop);
 613 }
 614
 615 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 616                                struct ieee80211_sub_if_data *sdata,
 617                                enum queue_stop_reason reason)
 618 {
 619         ieee80211_stop_queues_by_reason(&local->hw,
 620                                         ieee80211_get_vif_queues(local, sdata),
 621                                         reason, true);
 622 }
 623
 624 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 625                                struct ieee80211_sub_if_data *sdata,
 626                                enum queue_stop_reason reason)
 627 {
 628         ieee80211_wake_queues_by_reason(&local->hw,
 629                                         ieee80211_get_vif_queues(local, sdata),
 630                                         reason, true);
 631 }
 632
 633 static void __iterate_interfaces(struct ieee80211_local *local,
 634                                  u32 iter_flags,
 635                                  void (*iterator)(void *data, u8 *mac,
 636                                                   struct ieee80211_vif *vif),
 637                                  void *data)
 638 {
 639         struct ieee80211_sub_if_data *sdata;
 640         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 641
 642         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 643                 switch (sdata->vif.type) {
 644                 case NL80211_IFTYPE_MONITOR:
 645                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 646                                 continue;
 647                         break;
 648                 case NL80211_IFTYPE_AP_VLAN:
 649                         continue;
 650                 default:
 651                         break;
 652                 }
 653                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 654                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 655                         continue;
 656                 if (ieee80211_sdata_running(sdata) || !active_only)
 657                         iterator(data, sdata->vif.addr,
 658                                  &sdata->vif);
 659         }
 660
 661         sdata = rcu_dereference_check(local->monitor_sdata,
 662                                       lockdep_is_held(&local->iflist_mtx) ||
 663                                       lockdep_rtnl_is_held());
 664         if (sdata &&
 665             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 666              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 667                 iterator(data, sdata->vif.addr, &sdata->vif);
 668 }
 669
 670 void ieee80211_iterate_interfaces(
 671         struct ieee80211_hw *hw, u32 iter_flags,
 672         void (*iterator)(void *data, u8 *mac,
 673                          struct ieee80211_vif *vif),
 674         void *data)
 675 {
 676         struct ieee80211_local *local = hw_to_local(hw);
 677
 678         mutex_lock(&local->iflist_mtx);
 679         __iterate_interfaces(local, iter_flags, iterator, data);
 680         mutex_unlock(&local->iflist_mtx);
 681 }
 682 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 683
 684 void ieee80211_iterate_active_interfaces_atomic(
 685         struct ieee80211_hw *hw, u32 iter_flags,
 686         void (*iterator)(void *data, u8 *mac,
 687                          struct ieee80211_vif *vif),
 688         void *data)
 689 {
 690         struct ieee80211_local *local = hw_to_local(hw);
 691
 692         rcu_read_lock();
 693         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 694                              iterator, data);
 695         rcu_read_unlock();
 696 }
 697 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 698
 699 void ieee80211_iterate_active_interfaces_rtnl(
 700         struct ieee80211_hw *hw, u32 iter_flags,
 701         void (*iterator)(void *data, u8 *mac,
 702                          struct ieee80211_vif *vif),
 703         void *data)
 704 {
 705         struct ieee80211_local *local = hw_to_local(hw);
 706
 707         ASSERT_RTNL();
 708
 709         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 710                              iterator, data);
 711 }
 712 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 713
 714 static void __iterate_stations(struct ieee80211_local *local,
 715                                void (*iterator)(void *data,
 716                                                 struct ieee80211_sta *sta),
 717                                void *data)
 718 {
 719         struct sta_info *sta;
 720
 721         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 722                 if (!sta->uploaded)
 723                         continue;
 724
 725                 iterator(data, &sta->sta);
 726         }
 727 }
 728
 729 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 730                         void (*iterator)(void *data,
 731                                          struct ieee80211_sta *sta),
 732                         void *data)
 733 {
 734         struct ieee80211_local *local = hw_to_local(hw);
 735
 736         rcu_read_lock();
 737         __iterate_stations(local, iterator, data);
 738         rcu_read_unlock();
 739 }
 740 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 741
 742 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 743 {
 744         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 745
 746         if (!ieee80211_sdata_running(sdata) ||
 747             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 748                 return NULL;
 749         return &sdata->vif;
 750 }
 751 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 752
 753 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 754 {
 755         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 756
 757         if (!ieee80211_sdata_running(sdata) ||
 758             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 759                 return NULL;
 760
 761         return &sdata->wdev;
 762 }
 763 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 764
 765 /*
 766  * Nothing should have been stuffed into the workqueue during
 767  * the suspend->resume cycle. Since we can't check each caller
 768  * of this function if we are already quiescing / suspended,
 769  * check here and don't WARN since this can actually happen when
 770  * the rx path (for example) is racing against __ieee80211_suspend
 771  * and suspending / quiescing was set after the rx path checked
 772  * them.
 773  */
 774 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 775 {
 776         if (local->quiescing || (local->suspended && !local->resuming)) {
 777                 pr_warn("queueing ieee80211 work while going to suspend\n");
 778                 return false;
 779         }
 780
 781         return true;
 782 }
 783
 784 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 785 {
 786         struct ieee80211_local *local = hw_to_local(hw);
 787
 788         if (!ieee80211_can_queue_work(local))
 789                 return;
 790
 791         queue_work(local->workqueue, work);
 792 }
 793 EXPORT_SYMBOL(ieee80211_queue_work);
 794
 795 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 796                                   struct delayed_work *dwork,
 797                                   unsigned long delay)
 798 {
 799         struct ieee80211_local *local = hw_to_local(hw);
 800
 801         if (!ieee80211_can_queue_work(local))
 802                 return;
 803
 804         queue_delayed_work(local->workqueue, dwork, delay);
 805 }
 806 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 807
 808 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 809                                struct ieee802_11_elems *elems,
 810                                u64 filter, u32 crc)
 811 {
 812         size_t left = len;
 813         const u8 *pos = start;
 814         bool calc_crc = filter != 0;
 815         DECLARE_BITMAP(seen_elems, 256);
 816         const u8 *ie;
 817
 818         bitmap_zero(seen_elems, 256);
 819         memset(elems, 0, sizeof(*elems));
 820         elems->ie_start = start;
 821         elems->total_len = len;
 822
 823         while (left >= 2) {
 824                 u8 id, elen;
 825                 bool elem_parse_failed;
 826
 827                 id = *pos++;
 828                 elen = *pos++;
 829                 left -= 2;
 830
 831                 if (elen > left) {
 832                         elems->parse_error = true;
 833                         break;
 834                 }
 835
 836                 switch (id) {
 837                 case WLAN_EID_SSID:
 838                 case WLAN_EID_SUPP_RATES:
 839                 case WLAN_EID_FH_PARAMS:
 840                 case WLAN_EID_DS_PARAMS:
 841                 case WLAN_EID_CF_PARAMS:
 842                 case WLAN_EID_TIM:
 843                 case WLAN_EID_IBSS_PARAMS:
 844                 case WLAN_EID_CHALLENGE:
 845                 case WLAN_EID_RSN:
 846                 case WLAN_EID_ERP_INFO:
 847                 case WLAN_EID_EXT_SUPP_RATES:
 848                 case WLAN_EID_HT_CAPABILITY:
 849                 case WLAN_EID_HT_OPERATION:
 850                 case WLAN_EID_VHT_CAPABILITY:
 851                 case WLAN_EID_VHT_OPERATION:
 852                 case WLAN_EID_MESH_ID:
 853                 case WLAN_EID_MESH_CONFIG:
 854                 case WLAN_EID_PEER_MGMT:
 855                 case WLAN_EID_PREQ:
 856                 case WLAN_EID_PREP:
 857                 case WLAN_EID_PERR:
 858                 case WLAN_EID_RANN:
 859                 case WLAN_EID_CHANNEL_SWITCH:
 860                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 861                 case WLAN_EID_COUNTRY:
 862                 case WLAN_EID_PWR_CONSTRAINT:
 863                 case WLAN_EID_TIMEOUT_INTERVAL:
 864                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 865                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 866                 case WLAN_EID_CHAN_SWITCH_PARAM:
 867                 case WLAN_EID_EXT_CAPABILITY:
 868                 case WLAN_EID_CHAN_SWITCH_TIMING:
 869                 case WLAN_EID_LINK_ID:
 870                 /*
 871                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 872                  * that if the content gets bigger it might be needed more than once
 873                  */
 874                         if (test_bit(id, seen_elems)) {
 875                                 elems->parse_error = true;
 876                                 left -= elen;
 877                                 pos += elen;
 878                                 continue;
 879                         }
 880                         break;
 881                 }
 882
 883                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 884                         crc = crc32_be(crc, pos - 2, elen + 2);
 885
 886                 elem_parse_failed = false;
 887
 888                 switch (id) {
 889                 case WLAN_EID_LINK_ID:
 890                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 891                                 elem_parse_failed = true;
 892                                 break;
 893                         }
 894                         elems->lnk_id = (void *)(pos - 2);
 895                         break;
 896                 case WLAN_EID_CHAN_SWITCH_TIMING:
 897                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 898                                 elem_parse_failed = true;
 899                                 break;
 900                         }
 901                         elems->ch_sw_timing = (void *)pos;
 902                         break;
 903                 case WLAN_EID_EXT_CAPABILITY:
 904                         elems->ext_capab = pos;
 905                         elems->ext_capab_len = elen;
 906                         break;
 907                 case WLAN_EID_SSID:
 908                         elems->ssid = pos;
 909                         elems->ssid_len = elen;
 910                         break;
 911                 case WLAN_EID_SUPP_RATES:
 912                         elems->supp_rates = pos;
 913                         elems->supp_rates_len = elen;
 914                         break;
 915                 case WLAN_EID_DS_PARAMS:
 916                         if (elen >= 1)
 917                                 elems->ds_params = pos;
 918                         else
 919                                 elem_parse_failed = true;
 920                         break;
 921                 case WLAN_EID_TIM:
 922                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 923                                 elems->tim = (void *)pos;
 924                                 elems->tim_len = elen;
 925                         } else
 926                                 elem_parse_failed = true;
 927                         break;
 928                 case WLAN_EID_CHALLENGE:
 929                         elems->challenge = pos;
 930                         elems->challenge_len = elen;
 931                         break;
 932                 case WLAN_EID_VENDOR_SPECIFIC:
 933                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 934                             pos[2] == 0xf2) {
 935                                 /* Microsoft OUI (00:50:F2) */
 936
 937                                 if (calc_crc)
 938                                         crc = crc32_be(crc, pos - 2, elen + 2);
 939
 940                                 if (elen >= 5 && pos[3] == 2) {
 941                                         /* OUI Type 2 - WMM IE */
 942                                         if (pos[4] == 0) {
 943                                                 elems->wmm_info = pos;
 944                                                 elems->wmm_info_len = elen;
 945                                         } else if (pos[4] == 1) {
 946                                                 elems->wmm_param = pos;
 947                                                 elems->wmm_param_len = elen;
 948                                         }
 949                                 }
 950                         }
 951                         break;
 952                 case WLAN_EID_RSN:
 953                         elems->rsn = pos;
 954                         elems->rsn_len = elen;
 955                         break;
 956                 case WLAN_EID_ERP_INFO:
 957                         if (elen >= 1)
 958                                 elems->erp_info = pos;
 959                         else
 960                                 elem_parse_failed = true;
 961                         break;
 962                 case WLAN_EID_EXT_SUPP_RATES:
 963                         elems->ext_supp_rates = pos;
 964                         elems->ext_supp_rates_len = elen;
 965                         break;
 966                 case WLAN_EID_HT_CAPABILITY:
 967                         if (elen >= sizeof(struct ieee80211_ht_cap))
 968                                 elems->ht_cap_elem = (void *)pos;
 969                         else
 970                                 elem_parse_failed = true;
 971                         break;
 972                 case WLAN_EID_HT_OPERATION:
 973                         if (elen >= sizeof(struct ieee80211_ht_operation))
 974                                 elems->ht_operation = (void *)pos;
 975                         else
 976                                 elem_parse_failed = true;
 977                         break;
 978                 case WLAN_EID_VHT_CAPABILITY:
 979                         if (elen >= sizeof(struct ieee80211_vht_cap))
 980                                 elems->vht_cap_elem = (void *)pos;
 981                         else
 982                                 elem_parse_failed = true;
 983                         break;
 984                 case WLAN_EID_VHT_OPERATION:
 985                         if (elen >= sizeof(struct ieee80211_vht_operation))
 986                                 elems->vht_operation = (void *)pos;
 987                         else
 988                                 elem_parse_failed = true;
 989                         break;
 990                 case WLAN_EID_OPMODE_NOTIF:
 991                         if (elen > 0)
 992                                 elems->opmode_notif = pos;
 993                         else
 994                                 elem_parse_failed = true;
 995                         break;
 996                 case WLAN_EID_MESH_ID:
 997                         elems->mesh_id = pos;
 998                         elems->mesh_id_len = elen;
 999                         break;
1000                 case WLAN_EID_MESH_CONFIG:
1001                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1002                                 elems->mesh_config = (void *)pos;
1003                         else
1004                                 elem_parse_failed = true;
1005                         break;
1006                 case WLAN_EID_PEER_MGMT:
1007                         elems->peering = pos;
1008                         elems->peering_len = elen;
1009                         break;
1010                 case WLAN_EID_MESH_AWAKE_WINDOW:
1011                         if (elen >= 2)
1012                                 elems->awake_window = (void *)pos;
1013                         break;
1014                 case WLAN_EID_PREQ:
1015                         elems->preq = pos;
1016                         elems->preq_len = elen;
1017                         break;
1018                 case WLAN_EID_PREP:
1019                         elems->prep = pos;
1020                         elems->prep_len = elen;
1021                         break;
1022                 case WLAN_EID_PERR:
1023                         elems->perr = pos;
1024                         elems->perr_len = elen;
1025                         break;
1026                 case WLAN_EID_RANN:
1027                         if (elen >= sizeof(struct ieee80211_rann_ie))
1028                                 elems->rann = (void *)pos;
1029                         else
1030                                 elem_parse_failed = true;
1031                         break;
1032                 case WLAN_EID_CHANNEL_SWITCH:
1033                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1034                                 elem_parse_failed = true;
1035                                 break;
1036                         }
1037                         elems->ch_switch_ie = (void *)pos;
1038                         break;
1039                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1040                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1041                                 elem_parse_failed = true;
1042                                 break;
1043                         }
1044                         elems->ext_chansw_ie = (void *)pos;
1045                         break;
1046                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1048                                 elem_parse_failed = true;
1049                                 break;
1050                         }
1051                         elems->sec_chan_offs = (void *)pos;
1052                         break;
1053                 case WLAN_EID_CHAN_SWITCH_PARAM:
1054                         if (elen !=
1055                             sizeof(*elems->mesh_chansw_params_ie)) {
1056                                 elem_parse_failed = true;
1057                                 break;
1058                         }
1059                         elems->mesh_chansw_params_ie = (void *)pos;
1060                         break;
1061                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1062                         if (!action ||
1063                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1064                                 elem_parse_failed = true;
1065                                 break;
1066                         }
1067                         elems->wide_bw_chansw_ie = (void *)pos;
1068                         break;
1069                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1070                         if (action) {
1071                                 elem_parse_failed = true;
1072                                 break;
1073                         }
1074                         /*
1075                          * This is a bit tricky, but as we only care about
1076                          * the wide bandwidth channel switch element, so
1077                          * just parse it out manually.
1078                          */
1079                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1080                                               pos, elen);
1081                         if (ie) {
1082                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1083                                         elems->wide_bw_chansw_ie =
1084                                                 (void *)(ie + 2);
1085                                 else
1086                                         elem_parse_failed = true;
1087                         }
1088                         break;
1089                 case WLAN_EID_COUNTRY:
1090                         elems->country_elem = pos;
1091                         elems->country_elem_len = elen;
1092                         break;
1093                 case WLAN_EID_PWR_CONSTRAINT:
1094                         if (elen != 1) {
1095                                 elem_parse_failed = true;
1096                                 break;
1097                         }
1098                         elems->pwr_constr_elem = pos;
1099                         break;
1100                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1101                         /* Lots of different options exist, but we only care
1102                          * about the Dynamic Transmit Power Control element.
1103                          * First check for the Cisco OUI, then for the DTPC
1104                          * tag (0x00).
1105                          */
1106                         if (elen < 4) {
1107                                 elem_parse_failed = true;
1108                                 break;
1109                         }
1110
1111                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1112                             pos[2] != 0x96 || pos[3] != 0x00)
1113                                 break;
1114
1115                         if (elen != 6) {
1116                                 elem_parse_failed = true;
1117                                 break;
1118                         }
1119
1120                         if (calc_crc)
1121                                 crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123                         elems->cisco_dtpc_elem = pos;
1124                         break;
1125                 case WLAN_EID_TIMEOUT_INTERVAL:
1126                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1127                                 elems->timeout_int = (void *)pos;
1128                         else
1129                                 elem_parse_failed = true;
1130                         break;
1131                 default:
1132                         break;
1133                 }
1134
1135                 if (elem_parse_failed)
1136                         elems->parse_error = true;
1137                 else
1138                         __set_bit(id, seen_elems);
1139
1140                 left -= elen;
1141                 pos += elen;
1142         }
1143
1144         if (left != 0)
1145                 elems->parse_error = true;
1146
1147         return crc;
1148 }
1149
1150 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1151                                bool bss_notify)
1152 {
1153         struct ieee80211_local *local = sdata->local;
1154         struct ieee80211_tx_queue_params qparam;
1155         struct ieee80211_chanctx_conf *chanctx_conf;
1156         int ac;
1157         bool use_11b, enable_qos;
1158         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1159         int aCWmin, aCWmax;
1160
1161         if (!local->ops->conf_tx)
1162                 return;
1163
1164         if (local->hw.queues < IEEE80211_NUM_ACS)
1165                 return;
1166
1167         memset(&qparam, 0, sizeof(qparam));
1168
1169         rcu_read_lock();
1170         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1171         use_11b = (chanctx_conf &&
1172                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1173                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1174         rcu_read_unlock();
1175
1176         /*
1177          * By default disable QoS in STA mode for old access points, which do
1178          * not support 802.11e. New APs will provide proper queue parameters,
1179          * that we will configure later.
1180          */
1181         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1182
1183         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1184
1185         /* Set defaults according to 802.11-2007 Table 7-37 */
1186         aCWmax = 1023;
1187         if (use_11b)
1188                 aCWmin = 31;
1189         else
1190                 aCWmin = 15;
1191
1192         /* Confiure old 802.11b/g medium access rules. */
1193         qparam.cw_max = aCWmax;
1194         qparam.cw_min = aCWmin;
1195         qparam.txop = 0;
1196         qparam.aifs = 2;
1197
1198         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1199                 /* Update if QoS is enabled. */
1200                 if (enable_qos) {
1201                         switch (ac) {
1202                         case IEEE80211_AC_BK:
1203                                 qparam.cw_max = aCWmax;
1204                                 qparam.cw_min = aCWmin;
1205                                 qparam.txop = 0;
1206                                 if (is_ocb)
1207                                         qparam.aifs = 9;
1208                                 else
1209                                         qparam.aifs = 7;
1210                                 break;
1211                         /* never happens but let's not leave undefined */
1212                         default:
1213                         case IEEE80211_AC_BE:
1214                                 qparam.cw_max = aCWmax;
1215                                 qparam.cw_min = aCWmin;
1216                                 qparam.txop = 0;
1217                                 if (is_ocb)
1218                                         qparam.aifs = 6;
1219                                 else
1220                                         qparam.aifs = 3;
1221                                 break;
1222                         case IEEE80211_AC_VI:
1223                                 qparam.cw_max = aCWmin;
1224                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1225                                 if (is_ocb)
1226                                         qparam.txop = 0;
1227                                 else if (use_11b)
1228                                         qparam.txop = 6016/32;
1229                                 else
1230                                         qparam.txop = 3008/32;
1231
1232                                 if (is_ocb)
1233                                         qparam.aifs = 3;
1234                                 else
1235                                         qparam.aifs = 2;
1236                                 break;
1237                         case IEEE80211_AC_VO:
1238                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1239                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1240                                 if (is_ocb)
1241                                         qparam.txop = 0;
1242                                 else if (use_11b)
1243                                         qparam.txop = 3264/32;
1244                                 else
1245                                         qparam.txop = 1504/32;
1246                                 qparam.aifs = 2;
1247                                 break;
1248                         }
1249                 }
1250
1251                 qparam.uapsd = false;
1252
1253                 sdata->tx_conf[ac] = qparam;
1254                 drv_conf_tx(local, sdata, ac, &qparam);
1255         }
1256
1257         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1258             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1259                 sdata->vif.bss_conf.qos = enable_qos;
1260                 if (bss_notify)
1261                         ieee80211_bss_info_change_notify(sdata,
1262                                                          BSS_CHANGED_QOS);
1263         }
1264 }
1265
1266 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1267                          u16 transaction, u16 auth_alg, u16 status,
1268                          const u8 *extra, size_t extra_len, const u8 *da,
1269                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1270                          u32 tx_flags)
1271 {
1272         struct ieee80211_local *local = sdata->local;
1273         struct sk_buff *skb;
1274         struct ieee80211_mgmt *mgmt;
1275         int err;
1276
1277         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1278         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1279                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1280         if (!skb)
1281                 return;
1282
1283         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1284
1285         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1286         memset(mgmt, 0, 24 + 6);
1287         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1288                                           IEEE80211_STYPE_AUTH);
1289         memcpy(mgmt->da, da, ETH_ALEN);
1290         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1291         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1292         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1293         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1294         mgmt->u.auth.status_code = cpu_to_le16(status);
1295         if (extra)
1296                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1297
1298         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1299                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1300                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1301                 WARN_ON(err);
1302         }
1303
1304         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1305                                         tx_flags;
1306         ieee80211_tx_skb(sdata, skb);
1307 }
1308
1309 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1310                                     const u8 *bssid, u16 stype, u16 reason,
1311                                     bool send_frame, u8 *frame_buf)
1312 {
1313         struct ieee80211_local *local = sdata->local;
1314         struct sk_buff *skb;
1315         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1316
1317         /* build frame */
1318         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1319         mgmt->duration = 0; /* initialize only */
1320         mgmt->seq_ctrl = 0; /* initialize only */
1321         memcpy(mgmt->da, bssid, ETH_ALEN);
1322         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1323         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1324         /* u.deauth.reason_code == u.disassoc.reason_code */
1325         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1326
1327         if (send_frame) {
1328                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1329                                     IEEE80211_DEAUTH_FRAME_LEN);
1330                 if (!skb)
1331                         return;
1332
1333                 skb_reserve(skb, local->hw.extra_tx_headroom);
1334
1335                 /* copy in frame */
1336                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1337                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1338
1339                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1340                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1341                         IEEE80211_SKB_CB(skb)->flags |=
1342                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1343
1344                 ieee80211_tx_skb(sdata, skb);
1345         }
1346 }
1347
1348 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1349                                          u8 *buffer, size_t buffer_len,
1350                                          const u8 *ie, size_t ie_len,
1351                                          enum ieee80211_band band,
1352                                          u32 rate_mask,
1353                                          struct cfg80211_chan_def *chandef,
1354                                          size_t *offset)
1355 {
1356         struct ieee80211_supported_band *sband;
1357         u8 *pos = buffer, *end = buffer + buffer_len;
1358         size_t noffset;
1359         int supp_rates_len, i;
1360         u8 rates[32];
1361         int num_rates;
1362         int ext_rates_len;
1363         int shift;
1364         u32 rate_flags;
1365         bool have_80mhz = false;
1366
1367         *offset = 0;
1368
1369         sband = local->hw.wiphy->bands[band];
1370         if (WARN_ON_ONCE(!sband))
1371                 return 0;
1372
1373         rate_flags = ieee80211_chandef_rate_flags(chandef);
1374         shift = ieee80211_chandef_get_shift(chandef);
1375
1376         num_rates = 0;
1377         for (i = 0; i < sband->n_bitrates; i++) {
1378                 if ((BIT(i) & rate_mask) == 0)
1379                         continue; /* skip rate */
1380                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1381                         continue;
1382
1383                 rates[num_rates++] =
1384                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1385                                           (1 << shift) * 5);
1386         }
1387
1388         supp_rates_len = min_t(int, num_rates, 8);
1389
1390         if (end - pos < 2 + supp_rates_len)
1391                 goto out_err;
1392         *pos++ = WLAN_EID_SUPP_RATES;
1393         *pos++ = supp_rates_len;
1394         memcpy(pos, rates, supp_rates_len);
1395         pos += supp_rates_len;
1396
1397         /* insert "request information" if in custom IEs */
1398         if (ie && ie_len) {
1399                 static const u8 before_extrates[] = {
1400                         WLAN_EID_SSID,
1401                         WLAN_EID_SUPP_RATES,
1402                         WLAN_EID_REQUEST,
1403                 };
1404                 noffset = ieee80211_ie_split(ie, ie_len,
1405                                              before_extrates,
1406                                              ARRAY_SIZE(before_extrates),
1407                                              *offset);
1408                 if (end - pos < noffset - *offset)
1409                         goto out_err;
1410                 memcpy(pos, ie + *offset, noffset - *offset);
1411                 pos += noffset - *offset;
1412                 *offset = noffset;
1413         }
1414
1415         ext_rates_len = num_rates - supp_rates_len;
1416         if (ext_rates_len > 0) {
1417                 if (end - pos < 2 + ext_rates_len)
1418                         goto out_err;
1419                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1420                 *pos++ = ext_rates_len;
1421                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1422                 pos += ext_rates_len;
1423         }
1424
1425         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1426                 if (end - pos < 3)
1427                         goto out_err;
1428                 *pos++ = WLAN_EID_DS_PARAMS;
1429                 *pos++ = 1;
1430                 *pos++ = ieee80211_frequency_to_channel(
1431                                 chandef->chan->center_freq);
1432         }
1433
1434         /* insert custom IEs that go before HT */
1435         if (ie && ie_len) {
1436                 static const u8 before_ht[] = {
1437                         WLAN_EID_SSID,
1438                         WLAN_EID_SUPP_RATES,
1439                         WLAN_EID_REQUEST,
1440                         WLAN_EID_EXT_SUPP_RATES,
1441                         WLAN_EID_DS_PARAMS,
1442                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1443                 };
1444                 noffset = ieee80211_ie_split(ie, ie_len,
1445                                              before_ht, ARRAY_SIZE(before_ht),
1446                                              *offset);
1447                 if (end - pos < noffset - *offset)
1448                         goto out_err;
1449                 memcpy(pos, ie + *offset, noffset - *offset);
1450                 pos += noffset - *offset;
1451                 *offset = noffset;
1452         }
1453
1454         if (sband->ht_cap.ht_supported) {
1455                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1456                         goto out_err;
1457                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1458                                                 sband->ht_cap.cap);
1459         }
1460
1461         /*
1462          * If adding more here, adjust code in main.c
1463          * that calculates local->scan_ies_len.
1464          */
1465
1466         /* insert custom IEs that go before VHT */
1467         if (ie && ie_len) {
1468                 static const u8 before_vht[] = {
1469                         WLAN_EID_SSID,
1470                         WLAN_EID_SUPP_RATES,
1471                         WLAN_EID_REQUEST,
1472                         WLAN_EID_EXT_SUPP_RATES,
1473                         WLAN_EID_DS_PARAMS,
1474                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1475                         WLAN_EID_HT_CAPABILITY,
1476                         WLAN_EID_BSS_COEX_2040,
1477                         WLAN_EID_EXT_CAPABILITY,
1478                         WLAN_EID_SSID_LIST,
1479                         WLAN_EID_CHANNEL_USAGE,
1480                         WLAN_EID_INTERWORKING,
1481                         /* mesh ID can't happen here */
1482                         /* 60 GHz can't happen here right now */
1483                 };
1484                 noffset = ieee80211_ie_split(ie, ie_len,
1485                                              before_vht, ARRAY_SIZE(before_vht),
1486                                              *offset);
1487                 if (end - pos < noffset - *offset)
1488                         goto out_err;
1489                 memcpy(pos, ie + *offset, noffset - *offset);
1490                 pos += noffset - *offset;
1491                 *offset = noffset;
1492         }
1493
1494         /* Check if any channel in this sband supports at least 80 MHz */
1495         for (i = 0; i < sband->n_channels; i++) {
1496                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1497                                                 IEEE80211_CHAN_NO_80MHZ))
1498                         continue;
1499
1500                 have_80mhz = true;
1501                 break;
1502         }
1503
1504         if (sband->vht_cap.vht_supported && have_80mhz) {
1505                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1506                         goto out_err;
1507                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1508                                                  sband->vht_cap.cap);
1509         }
1510
1511         return pos - buffer;
1512  out_err:
1513         WARN_ONCE(1, "not enough space for preq IEs\n");
1514         return pos - buffer;
1515 }
1516
1517 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1518                              size_t buffer_len,
1519                              struct ieee80211_scan_ies *ie_desc,
1520                              const u8 *ie, size_t ie_len,
1521                              u8 bands_used, u32 *rate_masks,
1522                              struct cfg80211_chan_def *chandef)
1523 {
1524         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1525         int i;
1526
1527         memset(ie_desc, 0, sizeof(*ie_desc));
1528
1529         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1530                 if (bands_used & BIT(i)) {
1531                         pos += ieee80211_build_preq_ies_band(local,
1532                                                              buffer + pos,
1533                                                              buffer_len - pos,
1534                                                              ie, ie_len, i,
1535                                                              rate_masks[i],
1536                                                              chandef,
1537                                                              &custom_ie_offset);
1538                         ie_desc->ies[i] = buffer + old_pos;
1539                         ie_desc->len[i] = pos - old_pos;
1540                         old_pos = pos;
1541                 }
1542         }
1543
1544         /* add any remaining custom IEs */
1545         if (ie && ie_len) {
1546                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1547                               "not enough space for preq custom IEs\n"))
1548                         return pos;
1549                 memcpy(buffer + pos, ie + custom_ie_offset,
1550                        ie_len - custom_ie_offset);
1551                 ie_desc->common_ies = buffer + pos;
1552                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1553                 pos += ie_len - custom_ie_offset;
1554         }
1555
1556         return pos;
1557 };
1558
1559 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1560                                           const u8 *src, const u8 *dst,
1561                                           u32 ratemask,
1562                                           struct ieee80211_channel *chan,
1563                                           const u8 *ssid, size_t ssid_len,
1564                                           const u8 *ie, size_t ie_len,
1565                                           bool directed)
1566 {
1567         struct ieee80211_local *local = sdata->local;
1568         struct cfg80211_chan_def chandef;
1569         struct sk_buff *skb;
1570         struct ieee80211_mgmt *mgmt;
1571         int ies_len;
1572         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1573         struct ieee80211_scan_ies dummy_ie_desc;
1574
1575         /*
1576          * Do not send DS Channel parameter for directed probe requests
1577          * in order to maximize the chance that we get a response.  Some
1578          * badly-behaved APs don't respond when this parameter is included.
1579          */
1580         chandef.width = sdata->vif.bss_conf.chandef.width;
1581         if (directed)
1582                 chandef.chan = NULL;
1583         else
1584                 chandef.chan = chan;
1585
1586         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1587                                      100 + ie_len);
1588         if (!skb)
1589                 return NULL;
1590
1591         rate_masks[chan->band] = ratemask;
1592         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1593                                            skb_tailroom(skb), &dummy_ie_desc,
1594                                            ie, ie_len, BIT(chan->band),
1595                                            rate_masks, &chandef);
1596         skb_put(skb, ies_len);
1597
1598         if (dst) {
1599                 mgmt = (struct ieee80211_mgmt *) skb->data;
1600                 memcpy(mgmt->da, dst, ETH_ALEN);
1601                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1602         }
1603
1604         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1605
1606         return skb;
1607 }
1608
1609 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1610                               const u8 *src, const u8 *dst,
1611                               const u8 *ssid, size_t ssid_len,
1612                               const u8 *ie, size_t ie_len,
1613                               u32 ratemask, bool directed, u32 tx_flags,
1614                               struct ieee80211_channel *channel, bool scan)
1615 {
1616         struct sk_buff *skb;
1617
1618         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1619                                         ssid, ssid_len,
1620                                         ie, ie_len, directed);
1621         if (skb) {
1622                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1623                 if (scan)
1624                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1625                 else
1626                         ieee80211_tx_skb(sdata, skb);
1627         }
1628 }
1629
1630 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1631                             struct ieee802_11_elems *elems,
1632                             enum ieee80211_band band, u32 *basic_rates)
1633 {
1634         struct ieee80211_supported_band *sband;
1635         size_t num_rates;
1636         u32 supp_rates, rate_flags;
1637         int i, j, shift;
1638         sband = sdata->local->hw.wiphy->bands[band];
1639
1640         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1641         shift = ieee80211_vif_get_shift(&sdata->vif);
1642
1643         if (WARN_ON(!sband))
1644                 return 1;
1645
1646         num_rates = sband->n_bitrates;
1647         supp_rates = 0;
1648         for (i = 0; i < elems->supp_rates_len +
1649                      elems->ext_supp_rates_len; i++) {
1650                 u8 rate = 0;
1651                 int own_rate;
1652                 bool is_basic;
1653                 if (i < elems->supp_rates_len)
1654                         rate = elems->supp_rates[i];
1655                 else if (elems->ext_supp_rates)
1656                         rate = elems->ext_supp_rates
1657                                 [i - elems->supp_rates_len];
1658                 own_rate = 5 * (rate & 0x7f);
1659                 is_basic = !!(rate & 0x80);
1660
1661                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1662                         continue;
1663
1664                 for (j = 0; j < num_rates; j++) {
1665                         int brate;
1666                         if ((rate_flags & sband->bitrates[j].flags)
1667                             != rate_flags)
1668                                 continue;
1669
1670                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1671                                              1 << shift);
1672
1673                         if (brate == own_rate) {
1674                                 supp_rates |= BIT(j);
1675                                 if (basic_rates && is_basic)
1676                                         *basic_rates |= BIT(j);
1677                         }
1678                 }
1679         }
1680         return supp_rates;
1681 }
1682
1683 void ieee80211_stop_device(struct ieee80211_local *local)
1684 {
1685         ieee80211_led_radio(local, false);
1686         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1687
1688         cancel_work_sync(&local->reconfig_filter);
1689
1690         flush_workqueue(local->workqueue);
1691         drv_stop(local);
1692 }
1693
1694 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1695 {
1696         struct ieee80211_sub_if_data *sdata;
1697         struct ieee80211_chanctx *ctx;
1698
1699         /*
1700          * We get here if during resume the device can't be restarted properly.
1701          * We might also get here if this happens during HW reset, which is a
1702          * slightly different situation and we need to drop all connections in
1703          * the latter case.
1704          *
1705          * Ask cfg80211 to turn off all interfaces, this will result in more
1706          * warnings but at least we'll then get into a clean stopped state.
1707          */
1708
1709         local->resuming = false;
1710         local->suspended = false;
1711         local->started = false;
1712
1713         /* scheduled scan clearly can't be running any more, but tell
1714          * cfg80211 and clear local state
1715          */
1716         ieee80211_sched_scan_end(local);
1717
1718         list_for_each_entry(sdata, &local->interfaces, list)
1719                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1720
1721         /* Mark channel contexts as not being in the driver any more to avoid
1722          * removing them from the driver during the shutdown process...
1723          */
1724         mutex_lock(&local->chanctx_mtx);
1725         list_for_each_entry(ctx, &local->chanctx_list, list)
1726                 ctx->driver_present = false;
1727         mutex_unlock(&local->chanctx_mtx);
1728
1729         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1730 }
1731
1732 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1733                                      struct ieee80211_sub_if_data *sdata)
1734 {
1735         struct ieee80211_chanctx_conf *conf;
1736         struct ieee80211_chanctx *ctx;
1737
1738         if (!local->use_chanctx)
1739                 return;
1740
1741         mutex_lock(&local->chanctx_mtx);
1742         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1743                                          lockdep_is_held(&local->chanctx_mtx));
1744         if (conf) {
1745                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1746                 drv_assign_vif_chanctx(local, sdata, ctx);
1747         }
1748         mutex_unlock(&local->chanctx_mtx);
1749 }
1750
1751 int ieee80211_reconfig(struct ieee80211_local *local)
1752 {
1753         struct ieee80211_hw *hw = &local->hw;
1754         struct ieee80211_sub_if_data *sdata;
1755         struct ieee80211_chanctx *ctx;
1756         struct sta_info *sta;
1757         int res, i;
1758         bool reconfig_due_to_wowlan = false;
1759         struct ieee80211_sub_if_data *sched_scan_sdata;
1760         struct cfg80211_sched_scan_request *sched_scan_req;
1761         bool sched_scan_stopped = false;
1762
1763         /* nothing to do if HW shouldn't run */
1764         if (!local->open_count)
1765                 goto wake_up;
1766
1767 #ifdef CONFIG_PM
1768         if (local->suspended)
1769                 local->resuming = true;
1770
1771         if (local->wowlan) {
1772                 res = drv_resume(local);
1773                 local->wowlan = false;
1774                 if (res < 0) {
1775                         local->resuming = false;
1776                         return res;
1777                 }
1778                 if (res == 0)
1779                         goto wake_up;
1780                 WARN_ON(res > 1);
1781                 /*
1782                  * res is 1, which means the driver requested
1783                  * to go through a regular reset on wakeup.
1784                  */
1785                 reconfig_due_to_wowlan = true;
1786         }
1787 #endif
1788
1789         /*
1790          * Upon resume hardware can sometimes be goofy due to
1791          * various platform / driver / bus issues, so restarting
1792          * the device may at times not work immediately. Propagate
1793          * the error.
1794          */
1795         res = drv_start(local);
1796         if (res) {
1797                 if (local->suspended)
1798                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1799                 else
1800                         WARN(1, "Hardware became unavailable during restart.\n");
1801                 ieee80211_handle_reconfig_failure(local);
1802                 return res;
1803         }
1804
1805         /* setup fragmentation threshold */
1806         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1807
1808         /* setup RTS threshold */
1809         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1810
1811         /* reset coverage class */
1812         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1813
1814         ieee80211_led_radio(local, true);
1815         ieee80211_mod_tpt_led_trig(local,
1816                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1817
1818         /* add interfaces */
1819         sdata = rtnl_dereference(local->monitor_sdata);
1820         if (sdata) {
1821                 /* in HW restart it exists already */
1822                 WARN_ON(local->resuming);
1823                 res = drv_add_interface(local, sdata);
1824                 if (WARN_ON(res)) {
1825                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1826                         synchronize_net();
1827                         kfree(sdata);
1828                 }
1829         }
1830
1831         list_for_each_entry(sdata, &local->interfaces, list) {
1832                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1833                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1834                     ieee80211_sdata_running(sdata)) {
1835                         res = drv_add_interface(local, sdata);
1836                         if (WARN_ON(res))
1837                                 break;
1838                 }
1839         }
1840
1841         /* If adding any of the interfaces failed above, roll back and
1842          * report failure.
1843          */
1844         if (res) {
1845                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1846                                                      list)
1847                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1848                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1849                             ieee80211_sdata_running(sdata))
1850                                 drv_remove_interface(local, sdata);
1851                 ieee80211_handle_reconfig_failure(local);
1852                 return res;
1853         }
1854
1855         /* add channel contexts */
1856         if (local->use_chanctx) {
1857                 mutex_lock(&local->chanctx_mtx);
1858                 list_for_each_entry(ctx, &local->chanctx_list, list)
1859                         if (ctx->replace_state !=
1860                             IEEE80211_CHANCTX_REPLACES_OTHER)
1861                                 WARN_ON(drv_add_chanctx(local, ctx));
1862                 mutex_unlock(&local->chanctx_mtx);
1863
1864                 list_for_each_entry(sdata, &local->interfaces, list) {
1865                         if (!ieee80211_sdata_running(sdata))
1866                                 continue;
1867                         ieee80211_assign_chanctx(local, sdata);
1868                 }
1869
1870                 sdata = rtnl_dereference(local->monitor_sdata);
1871                 if (sdata && ieee80211_sdata_running(sdata))
1872                         ieee80211_assign_chanctx(local, sdata);
1873         }
1874
1875         /* add STAs back */
1876         mutex_lock(&local->sta_mtx);
1877         list_for_each_entry(sta, &local->sta_list, list) {
1878                 enum ieee80211_sta_state state;
1879
1880                 if (!sta->uploaded)
1881                         continue;
1882
1883                 /* AP-mode stations will be added later */
1884                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1885                         continue;
1886
1887                 for (state = IEEE80211_STA_NOTEXIST;
1888                      state < sta->sta_state; state++)
1889                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1890                                               state + 1));
1891         }
1892         mutex_unlock(&local->sta_mtx);
1893
1894         /* reconfigure tx conf */
1895         if (hw->queues >= IEEE80211_NUM_ACS) {
1896                 list_for_each_entry(sdata, &local->interfaces, list) {
1897                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1898                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1899                             !ieee80211_sdata_running(sdata))
1900                                 continue;
1901
1902                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1903                                 drv_conf_tx(local, sdata, i,
1904                                             &sdata->tx_conf[i]);
1905                 }
1906         }
1907
1908         /* reconfigure hardware */
1909         ieee80211_hw_config(local, ~0);
1910
1911         ieee80211_configure_filter(local);
1912
1913         /* Finally also reconfigure all the BSS information */
1914         list_for_each_entry(sdata, &local->interfaces, list) {
1915                 u32 changed;
1916
1917                 if (!ieee80211_sdata_running(sdata))
1918                         continue;
1919
1920                 /* common change flags for all interface types */
1921                 changed = BSS_CHANGED_ERP_CTS_PROT |
1922                           BSS_CHANGED_ERP_PREAMBLE |
1923                           BSS_CHANGED_ERP_SLOT |
1924                           BSS_CHANGED_HT |
1925                           BSS_CHANGED_BASIC_RATES |
1926                           BSS_CHANGED_BEACON_INT |
1927                           BSS_CHANGED_BSSID |
1928                           BSS_CHANGED_CQM |
1929                           BSS_CHANGED_QOS |
1930                           BSS_CHANGED_IDLE |
1931                           BSS_CHANGED_TXPOWER;
1932
1933                 switch (sdata->vif.type) {
1934                 case NL80211_IFTYPE_STATION:
1935                         changed |= BSS_CHANGED_ASSOC |
1936                                    BSS_CHANGED_ARP_FILTER |
1937                                    BSS_CHANGED_PS;
1938
1939                         /* Re-send beacon info report to the driver */
1940                         if (sdata->u.mgd.have_beacon)
1941                                 changed |= BSS_CHANGED_BEACON_INFO;
1942
1943                         sdata_lock(sdata);
1944                         ieee80211_bss_info_change_notify(sdata, changed);
1945                         sdata_unlock(sdata);
1946                         break;
1947                 case NL80211_IFTYPE_OCB:
1948                         changed |= BSS_CHANGED_OCB;
1949                         ieee80211_bss_info_change_notify(sdata, changed);
1950                         break;
1951                 case NL80211_IFTYPE_ADHOC:
1952                         changed |= BSS_CHANGED_IBSS;
1953                         /* fall through */
1954                 case NL80211_IFTYPE_AP:
1955                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1956
1957                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1958                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1959
1960                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1961                                         drv_start_ap(local, sdata);
1962                         }
1963
1964                         /* fall through */
1965                 case NL80211_IFTYPE_MESH_POINT:
1966                         if (sdata->vif.bss_conf.enable_beacon) {
1967                                 changed |= BSS_CHANGED_BEACON |
1968                                            BSS_CHANGED_BEACON_ENABLED;
1969                                 ieee80211_bss_info_change_notify(sdata, changed);
1970                         }
1971                         break;
1972                 case NL80211_IFTYPE_WDS:
1973                 case NL80211_IFTYPE_AP_VLAN:
1974                 case NL80211_IFTYPE_MONITOR:
1975                 case NL80211_IFTYPE_P2P_DEVICE:
1976                         /* nothing to do */
1977                         break;
1978                 case NL80211_IFTYPE_UNSPECIFIED:
1979                 case NUM_NL80211_IFTYPES:
1980                 case NL80211_IFTYPE_P2P_CLIENT:
1981                 case NL80211_IFTYPE_P2P_GO:
1982                         WARN_ON(1);
1983                         break;
1984                 }
1985         }
1986
1987         ieee80211_recalc_ps(local, -1);
1988
1989         /*
1990          * The sta might be in psm against the ap (e.g. because
1991          * this was the state before a hw restart), so we
1992          * explicitly send a null packet in order to make sure
1993          * it'll sync against the ap (and get out of psm).
1994          */
1995         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1996                 list_for_each_entry(sdata, &local->interfaces, list) {
1997                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1998                                 continue;
1999                         if (!sdata->u.mgd.associated)
2000                                 continue;
2001
2002                         ieee80211_send_nullfunc(local, sdata, 0);
2003                 }
2004         }
2005
2006         /* APs are now beaconing, add back stations */
2007         mutex_lock(&local->sta_mtx);
2008         list_for_each_entry(sta, &local->sta_list, list) {
2009                 enum ieee80211_sta_state state;
2010
2011                 if (!sta->uploaded)
2012                         continue;
2013
2014                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
2015                         continue;
2016
2017                 for (state = IEEE80211_STA_NOTEXIST;
2018                      state < sta->sta_state; state++)
2019                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2020                                               state + 1));
2021         }
2022         mutex_unlock(&local->sta_mtx);
2023
2024         /* add back keys */
2025         list_for_each_entry(sdata, &local->interfaces, list)
2026                 if (ieee80211_sdata_running(sdata))
2027                         ieee80211_enable_keys(sdata);
2028
2029  wake_up:
2030         local->in_reconfig = false;
2031         barrier();
2032
2033         if (local->monitors == local->open_count && local->monitors > 0)
2034                 ieee80211_add_virtual_monitor(local);
2035
2036         /*
2037          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2038          * sessions can be established after a resume.
2039          *
2040          * Also tear down aggregation sessions since reconfiguring
2041          * them in a hardware restart scenario is not easily done
2042          * right now, and the hardware will have lost information
2043          * about the sessions, but we and the AP still think they
2044          * are active. This is really a workaround though.
2045          */
2046         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2047                 mutex_lock(&local->sta_mtx);
2048
2049                 list_for_each_entry(sta, &local->sta_list, list) {
2050                         ieee80211_sta_tear_down_BA_sessions(
2051                                         sta, AGG_STOP_LOCAL_REQUEST);
2052                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2053                 }
2054
2055                 mutex_unlock(&local->sta_mtx);
2056         }
2057
2058         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2059                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2060                                         false);
2061
2062         /*
2063          * Reconfigure sched scan if it was interrupted by FW restart or
2064          * suspend.
2065          */
2066         mutex_lock(&local->mtx);
2067         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2068                                                 lockdep_is_held(&local->mtx));
2069         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2070                                                 lockdep_is_held(&local->mtx));
2071         if (sched_scan_sdata && sched_scan_req)
2072                 /*
2073                  * Sched scan stopped, but we don't want to report it. Instead,
2074                  * we're trying to reschedule.
2075                  */
2076                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2077                                                          sched_scan_req))
2078                         sched_scan_stopped = true;
2079         mutex_unlock(&local->mtx);
2080
2081         if (sched_scan_stopped)
2082                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2083
2084         /*
2085          * If this is for hw restart things are still running.
2086          * We may want to change that later, however.
2087          */
2088         if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2089                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2090
2091         if (!local->suspended)
2092                 return 0;
2093
2094 #ifdef CONFIG_PM
2095         /* first set suspended false, then resuming */
2096         local->suspended = false;
2097         mb();
2098         local->resuming = false;
2099
2100         /* It's possible that we don't handle the scan completion in
2101          * time during suspend, so if it's still marked as completed
2102          * here, queue the work and flush it to clean things up.
2103          * Instead of calling the worker function directly here, we
2104          * really queue it to avoid potential races with other flows
2105          * scheduling the same work.
2106          */
2107         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2108                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2109                 flush_delayed_work(&local->scan_work);
2110         }
2111
2112         if (local->open_count && !reconfig_due_to_wowlan)
2113                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2114
2115         list_for_each_entry(sdata, &local->interfaces, list) {
2116                 if (!ieee80211_sdata_running(sdata))
2117                         continue;
2118                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2119                         ieee80211_sta_restart(sdata);
2120         }
2121
2122         mod_timer(&local->sta_cleanup, jiffies + 1);
2123 #else
2124         WARN_ON(1);
2125 #endif
2126
2127         return 0;
2128 }
2129
2130 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2131 {
2132         struct ieee80211_sub_if_data *sdata;
2133         struct ieee80211_local *local;
2134         struct ieee80211_key *key;
2135
2136         if (WARN_ON(!vif))
2137                 return;
2138
2139         sdata = vif_to_sdata(vif);
2140         local = sdata->local;
2141
2142         if (WARN_ON(!local->resuming))
2143                 return;
2144
2145         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2146                 return;
2147
2148         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2149
2150         mutex_lock(&local->key_mtx);
2151         list_for_each_entry(key, &sdata->key_list, list)
2152                 key->flags |= KEY_FLAG_TAINTED;
2153         mutex_unlock(&local->key_mtx);
2154 }
2155 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2156
2157 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2158 {
2159         struct ieee80211_local *local = sdata->local;
2160         struct ieee80211_chanctx_conf *chanctx_conf;
2161         struct ieee80211_chanctx *chanctx;
2162
2163         mutex_lock(&local->chanctx_mtx);
2164
2165         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2166                                         lockdep_is_held(&local->chanctx_mtx));
2167
2168         if (WARN_ON_ONCE(!chanctx_conf))
2169                 goto unlock;
2170
2171         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2172         ieee80211_recalc_smps_chanctx(local, chanctx);
2173  unlock:
2174         mutex_unlock(&local->chanctx_mtx);
2175 }
2176
2177 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2178 {
2179         struct ieee80211_local *local = sdata->local;
2180         struct ieee80211_chanctx_conf *chanctx_conf;
2181         struct ieee80211_chanctx *chanctx;
2182
2183         mutex_lock(&local->chanctx_mtx);
2184
2185         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2186                                         lockdep_is_held(&local->chanctx_mtx));
2187
2188         if (WARN_ON_ONCE(!chanctx_conf))
2189                 goto unlock;
2190
2191         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2192         ieee80211_recalc_chanctx_min_def(local, chanctx);
2193  unlock:
2194         mutex_unlock(&local->chanctx_mtx);
2195 }
2196
2197 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2198 {
2199         size_t pos = offset;
2200
2201         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2202                 pos += 2 + ies[pos + 1];
2203
2204         return pos;
2205 }
2206
2207 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2208                                             int rssi_min_thold,
2209                                             int rssi_max_thold)
2210 {
2211         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2212
2213         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2214                 return;
2215
2216         /*
2217          * Scale up threshold values before storing it, as the RSSI averaging
2218          * algorithm uses a scaled up value as well. Change this scaling
2219          * factor if the RSSI averaging algorithm changes.
2220          */
2221         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2222         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2223 }
2224
2225 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2226                                     int rssi_min_thold,
2227                                     int rssi_max_thold)
2228 {
2229         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2230
2231         WARN_ON(rssi_min_thold == rssi_max_thold ||
2232                 rssi_min_thold > rssi_max_thold);
2233
2234         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2235                                        rssi_max_thold);
2236 }
2237 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2238
2239 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2240 {
2241         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2242
2243         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2244 }
2245 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2246
2247 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2248                               u16 cap)
2249 {
2250         __le16 tmp;
2251
2252         *pos++ = WLAN_EID_HT_CAPABILITY;
2253         *pos++ = sizeof(struct ieee80211_ht_cap);
2254         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2255
2256         /* capability flags */
2257         tmp = cpu_to_le16(cap);
2258         memcpy(pos, &tmp, sizeof(u16));
2259         pos += sizeof(u16);
2260
2261         /* AMPDU parameters */
2262         *pos++ = ht_cap->ampdu_factor |
2263                  (ht_cap->ampdu_density <<
2264                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2265
2266         /* MCS set */
2267         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2268         pos += sizeof(ht_cap->mcs);
2269
2270         /* extended capabilities */
2271         pos += sizeof(__le16);
2272
2273         /* BF capabilities */
2274         pos += sizeof(__le32);
2275
2276         /* antenna selection */
2277         pos += sizeof(u8);
2278
2279         return pos;
2280 }
2281
2282 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2283                                u32 cap)
2284 {
2285         __le32 tmp;
2286
2287         *pos++ = WLAN_EID_VHT_CAPABILITY;
2288         *pos++ = sizeof(struct ieee80211_vht_cap);
2289         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2290
2291         /* capability flags */
2292         tmp = cpu_to_le32(cap);
2293         memcpy(pos, &tmp, sizeof(u32));
2294         pos += sizeof(u32);
2295
2296         /* VHT MCS set */
2297         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2298         pos += sizeof(vht_cap->vht_mcs);
2299
2300         return pos;
2301 }
2302
2303 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2304                                const struct cfg80211_chan_def *chandef,
2305                                u16 prot_mode)
2306 {
2307         struct ieee80211_ht_operation *ht_oper;
2308         /* Build HT Information */
2309         *pos++ = WLAN_EID_HT_OPERATION;
2310         *pos++ = sizeof(struct ieee80211_ht_operation);
2311         ht_oper = (struct ieee80211_ht_operation *)pos;
2312         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2313                                         chandef->chan->center_freq);
2314         switch (chandef->width) {
2315         case NL80211_CHAN_WIDTH_160:
2316         case NL80211_CHAN_WIDTH_80P80:
2317         case NL80211_CHAN_WIDTH_80:
2318         case NL80211_CHAN_WIDTH_40:
2319                 if (chandef->center_freq1 > chandef->chan->center_freq)
2320                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2321                 else
2322                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2323                 break;
2324         default:
2325                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2326                 break;
2327         }
2328         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2329             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2330             chandef->width != NL80211_CHAN_WIDTH_20)
2331                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2332
2333         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2334         ht_oper->stbc_param = 0x0000;
2335
2336         /* It seems that Basic MCS set and Supported MCS set
2337            are identical for the first 10 bytes */
2338         memset(&ht_oper->basic_set, 0, 16);
2339         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2340
2341         return pos + sizeof(struct ieee80211_ht_operation);
2342 }
2343
2344 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2345                                 const struct cfg80211_chan_def *chandef)
2346 {
2347         struct ieee80211_vht_operation *vht_oper;
2348
2349         *pos++ = WLAN_EID_VHT_OPERATION;
2350         *pos++ = sizeof(struct ieee80211_vht_operation);
2351         vht_oper = (struct ieee80211_vht_operation *)pos;
2352         vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2353                                                         chandef->center_freq1);
2354         if (chandef->center_freq2)
2355                 vht_oper->center_freq_seg2_idx =
2356                         ieee80211_frequency_to_channel(chandef->center_freq2);
2357
2358         switch (chandef->width) {
2359         case NL80211_CHAN_WIDTH_160:
2360                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2361                 break;
2362         case NL80211_CHAN_WIDTH_80P80:
2363                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2364                 break;
2365         case NL80211_CHAN_WIDTH_80:
2366                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2367                 break;
2368         default:
2369                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2370                 break;
2371         }
2372
2373         /* don't require special VHT peer rates */
2374         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2375
2376         return pos + sizeof(struct ieee80211_vht_operation);
2377 }
2378
2379 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2380                                   const struct ieee80211_ht_operation *ht_oper,
2381                                   struct cfg80211_chan_def *chandef)
2382 {
2383         enum nl80211_channel_type channel_type;
2384
2385         if (!ht_oper) {
2386                 cfg80211_chandef_create(chandef, control_chan,
2387                                         NL80211_CHAN_NO_HT);
2388                 return;
2389         }
2390
2391         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2392         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2393                 channel_type = NL80211_CHAN_HT20;
2394                 break;
2395         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2396                 channel_type = NL80211_CHAN_HT40PLUS;
2397                 break;
2398         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2399                 channel_type = NL80211_CHAN_HT40MINUS;
2400                 break;
2401         default:
2402                 channel_type = NL80211_CHAN_NO_HT;
2403         }
2404
2405         cfg80211_chandef_create(chandef, control_chan, channel_type);
2406 }
2407
2408 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2409                                    const struct ieee80211_vht_operation *oper,
2410                                    struct cfg80211_chan_def *chandef)
2411 {
2412         if (!oper)
2413                 return;
2414
2415         chandef->chan = control_chan;
2416
2417         switch (oper->chan_width) {
2418         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2419                 break;
2420         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2421                 chandef->width = NL80211_CHAN_WIDTH_80;
2422                 break;
2423         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2424                 chandef->width = NL80211_CHAN_WIDTH_160;
2425                 break;
2426         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2427                 chandef->width = NL80211_CHAN_WIDTH_80P80;
2428                 break;
2429         default:
2430                 break;
2431         }
2432
2433         chandef->center_freq1 =
2434                 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2435                                                control_chan->band);
2436         chandef->center_freq2 =
2437                 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2438                                                control_chan->band);
2439 }
2440
2441 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2442                              const struct ieee80211_supported_band *sband,
2443                              const u8 *srates, int srates_len, u32 *rates)
2444 {
2445         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2446         int shift = ieee80211_chandef_get_shift(chandef);
2447         struct ieee80211_rate *br;
2448         int brate, rate, i, j, count = 0;
2449
2450         *rates = 0;
2451
2452         for (i = 0; i < srates_len; i++) {
2453                 rate = srates[i] & 0x7f;
2454
2455                 for (j = 0; j < sband->n_bitrates; j++) {
2456                         br = &sband->bitrates[j];
2457                         if ((rate_flags & br->flags) != rate_flags)
2458                                 continue;
2459
2460                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2461                         if (brate == rate) {
2462                                 *rates |= BIT(j);
2463                                 count++;
2464                                 break;
2465                         }
2466                 }
2467         }
2468         return count;
2469 }
2470
2471 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2472                             struct sk_buff *skb, bool need_basic,
2473                             enum ieee80211_band band)
2474 {
2475         struct ieee80211_local *local = sdata->local;
2476         struct ieee80211_supported_band *sband;
2477         int rate, shift;
2478         u8 i, rates, *pos;
2479         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2480         u32 rate_flags;
2481
2482         shift = ieee80211_vif_get_shift(&sdata->vif);
2483         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2484         sband = local->hw.wiphy->bands[band];
2485         rates = 0;
2486         for (i = 0; i < sband->n_bitrates; i++) {
2487                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2488                         continue;
2489                 rates++;
2490         }
2491         if (rates > 8)
2492                 rates = 8;
2493
2494         if (skb_tailroom(skb) < rates + 2)
2495                 return -ENOMEM;
2496
2497         pos = skb_put(skb, rates + 2);
2498         *pos++ = WLAN_EID_SUPP_RATES;
2499         *pos++ = rates;
2500         for (i = 0; i < rates; i++) {
2501                 u8 basic = 0;
2502                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2503                         continue;
2504
2505                 if (need_basic && basic_rates & BIT(i))
2506                         basic = 0x80;
2507                 rate = sband->bitrates[i].bitrate;
2508                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2509                                     5 * (1 << shift));
2510                 *pos++ = basic | (u8) rate;
2511         }
2512
2513         return 0;
2514 }
2515
2516 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2517                                 struct sk_buff *skb, bool need_basic,
2518                                 enum ieee80211_band band)
2519 {
2520         struct ieee80211_local *local = sdata->local;
2521         struct ieee80211_supported_band *sband;
2522         int rate, shift;
2523         u8 i, exrates, *pos;
2524         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2525         u32 rate_flags;
2526
2527         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2528         shift = ieee80211_vif_get_shift(&sdata->vif);
2529
2530         sband = local->hw.wiphy->bands[band];
2531         exrates = 0;
2532         for (i = 0; i < sband->n_bitrates; i++) {
2533                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2534                         continue;
2535                 exrates++;
2536         }
2537
2538         if (exrates > 8)
2539                 exrates -= 8;
2540         else
2541                 exrates = 0;
2542
2543         if (skb_tailroom(skb) < exrates + 2)
2544                 return -ENOMEM;
2545
2546         if (exrates) {
2547                 pos = skb_put(skb, exrates + 2);
2548                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2549                 *pos++ = exrates;
2550                 for (i = 8; i < sband->n_bitrates; i++) {
2551                         u8 basic = 0;
2552                         if ((rate_flags & sband->bitrates[i].flags)
2553                             != rate_flags)
2554                                 continue;
2555                         if (need_basic && basic_rates & BIT(i))
2556                                 basic = 0x80;
2557                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2558                                             5 * (1 << shift));
2559                         *pos++ = basic | (u8) rate;
2560                 }
2561         }
2562         return 0;
2563 }
2564
2565 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2566 {
2567         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2568         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2569
2570         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2571                 /* non-managed type inferfaces */
2572                 return 0;
2573         }
2574         return ifmgd->ave_beacon_signal / 16;
2575 }
2576 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2577
2578 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2579 {
2580         if (!mcs)
2581                 return 1;
2582
2583         /* TODO: consider rx_highest */
2584
2585         if (mcs->rx_mask[3])
2586                 return 4;
2587         if (mcs->rx_mask[2])
2588                 return 3;
2589         if (mcs->rx_mask[1])
2590                 return 2;
2591         return 1;
2592 }
2593
2594 /**
2595  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2596  * @local: mac80211 hw info struct
2597  * @status: RX status
2598  * @mpdu_len: total MPDU length (including FCS)
2599  * @mpdu_offset: offset into MPDU to calculate timestamp at
2600  *
2601  * This function calculates the RX timestamp at the given MPDU offset, taking
2602  * into account what the RX timestamp was. An offset of 0 will just normalize
2603  * the timestamp to TSF at beginning of MPDU reception.
2604  */
2605 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2606                                      struct ieee80211_rx_status *status,
2607                                      unsigned int mpdu_len,
2608                                      unsigned int mpdu_offset)
2609 {
2610         u64 ts = status->mactime;
2611         struct rate_info ri;
2612         u16 rate;
2613
2614         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2615                 return 0;
2616
2617         memset(&ri, 0, sizeof(ri));
2618
2619         /* Fill cfg80211 rate info */
2620         if (status->flag & RX_FLAG_HT) {
2621                 ri.mcs = status->rate_idx;
2622                 ri.flags |= RATE_INFO_FLAGS_MCS;
2623                 if (status->flag & RX_FLAG_40MHZ)
2624                         ri.bw = RATE_INFO_BW_40;
2625                 else
2626                         ri.bw = RATE_INFO_BW_20;
2627                 if (status->flag & RX_FLAG_SHORT_GI)
2628                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2629         } else if (status->flag & RX_FLAG_VHT) {
2630                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2631                 ri.mcs = status->rate_idx;
2632                 ri.nss = status->vht_nss;
2633                 if (status->flag & RX_FLAG_40MHZ)
2634                         ri.bw = RATE_INFO_BW_40;
2635                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2636                         ri.bw = RATE_INFO_BW_80;
2637                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2638                         ri.bw = RATE_INFO_BW_160;
2639                 else
2640                         ri.bw = RATE_INFO_BW_20;
2641                 if (status->flag & RX_FLAG_SHORT_GI)
2642                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2643         } else {
2644                 struct ieee80211_supported_band *sband;
2645                 int shift = 0;
2646                 int bitrate;
2647
2648                 if (status->flag & RX_FLAG_10MHZ) {
2649                         shift = 1;
2650                         ri.bw = RATE_INFO_BW_10;
2651                 } else if (status->flag & RX_FLAG_5MHZ) {
2652                         shift = 2;
2653                         ri.bw = RATE_INFO_BW_5;
2654                 } else {
2655                         ri.bw = RATE_INFO_BW_20;
2656                 }
2657
2658                 sband = local->hw.wiphy->bands[status->band];
2659                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2660                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2661         }
2662
2663         rate = cfg80211_calculate_bitrate(&ri);
2664         if (WARN_ONCE(!rate,
2665                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2666                       status->flag, status->rate_idx, status->vht_nss))
2667                 return 0;
2668
2669         /* rewind from end of MPDU */
2670         if (status->flag & RX_FLAG_MACTIME_END)
2671                 ts -= mpdu_len * 8 * 10 / rate;
2672
2673         ts += mpdu_offset * 8 * 10 / rate;
2674
2675         return ts;
2676 }
2677
2678 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2679 {
2680         struct ieee80211_sub_if_data *sdata;
2681         struct cfg80211_chan_def chandef;
2682
2683         mutex_lock(&local->mtx);
2684         mutex_lock(&local->iflist_mtx);
2685         list_for_each_entry(sdata, &local->interfaces, list) {
2686                 /* it might be waiting for the local->mtx, but then
2687                  * by the time it gets it, sdata->wdev.cac_started
2688                  * will no longer be true
2689                  */
2690                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2691
2692                 if (sdata->wdev.cac_started) {
2693                         chandef = sdata->vif.bss_conf.chandef;
2694                         ieee80211_vif_release_channel(sdata);
2695                         cfg80211_cac_event(sdata->dev,
2696                                            &chandef,
2697                                            NL80211_RADAR_CAC_ABORTED,
2698                                            GFP_KERNEL);
2699                 }
2700         }
2701         mutex_unlock(&local->iflist_mtx);
2702         mutex_unlock(&local->mtx);
2703 }
2704
2705 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2706 {
2707         struct ieee80211_local *local =
2708                 container_of(work, struct ieee80211_local, radar_detected_work);
2709         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2710         struct ieee80211_chanctx *ctx;
2711         int num_chanctx = 0;
2712
2713         mutex_lock(&local->chanctx_mtx);
2714         list_for_each_entry(ctx, &local->chanctx_list, list) {
2715                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2716                         continue;
2717
2718                 num_chanctx++;
2719                 chandef = ctx->conf.def;
2720         }
2721         mutex_unlock(&local->chanctx_mtx);
2722
2723         ieee80211_dfs_cac_cancel(local);
2724
2725         if (num_chanctx > 1)
2726                 /* XXX: multi-channel is not supported yet */
2727                 WARN_ON(1);
2728         else
2729                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2730 }
2731
2732 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2733 {
2734         struct ieee80211_local *local = hw_to_local(hw);
2735
2736         trace_api_radar_detected(local);
2737
2738         ieee80211_queue_work(hw, &local->radar_detected_work);
2739 }
2740 EXPORT_SYMBOL(ieee80211_radar_detected);
2741
2742 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2743 {
2744         u32 ret;
2745         int tmp;
2746
2747         switch (c->width) {
2748         case NL80211_CHAN_WIDTH_20:
2749                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2750                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2751                 break;
2752         case NL80211_CHAN_WIDTH_40:
2753                 c->width = NL80211_CHAN_WIDTH_20;
2754                 c->center_freq1 = c->chan->center_freq;
2755                 ret = IEEE80211_STA_DISABLE_40MHZ |
2756                       IEEE80211_STA_DISABLE_VHT;
2757                 break;
2758         case NL80211_CHAN_WIDTH_80:
2759                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2760                 /* n_P40 */
2761                 tmp /= 2;
2762                 /* freq_P40 */
2763                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2764                 c->width = NL80211_CHAN_WIDTH_40;
2765                 ret = IEEE80211_STA_DISABLE_VHT;
2766                 break;
2767         case NL80211_CHAN_WIDTH_80P80:
2768                 c->center_freq2 = 0;
2769                 c->width = NL80211_CHAN_WIDTH_80;
2770                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2771                       IEEE80211_STA_DISABLE_160MHZ;
2772                 break;
2773         case NL80211_CHAN_WIDTH_160:
2774                 /* n_P20 */
2775                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2776                 /* n_P80 */
2777                 tmp /= 4;
2778                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2779                 c->width = NL80211_CHAN_WIDTH_80;
2780                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2781                       IEEE80211_STA_DISABLE_160MHZ;
2782                 break;
2783         default:
2784         case NL80211_CHAN_WIDTH_20_NOHT:
2785                 WARN_ON_ONCE(1);
2786                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2787                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2788                 break;
2789         case NL80211_CHAN_WIDTH_5:
2790         case NL80211_CHAN_WIDTH_10:
2791                 WARN_ON_ONCE(1);
2792                 /* keep c->width */
2793                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2794                 break;
2795         }
2796
2797         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2798
2799         return ret;
2800 }
2801
2802 /*
2803  * Returns true if smps_mode_new is strictly more restrictive than
2804  * smps_mode_old.
2805  */
2806 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2807                                    enum ieee80211_smps_mode smps_mode_new)
2808 {
2809         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2810                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2811                 return false;
2812
2813         switch (smps_mode_old) {
2814         case IEEE80211_SMPS_STATIC:
2815                 return false;
2816         case IEEE80211_SMPS_DYNAMIC:
2817                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2818         case IEEE80211_SMPS_OFF:
2819                 return smps_mode_new != IEEE80211_SMPS_OFF;
2820         default:
2821                 WARN_ON(1);
2822         }
2823
2824         return false;
2825 }
2826
2827 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2828                               struct cfg80211_csa_settings *csa_settings)
2829 {
2830         struct sk_buff *skb;
2831         struct ieee80211_mgmt *mgmt;
2832         struct ieee80211_local *local = sdata->local;
2833         int freq;
2834         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2835                                sizeof(mgmt->u.action.u.chan_switch);
2836         u8 *pos;
2837
2838         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2839             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2840                 return -EOPNOTSUPP;
2841
2842         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2843                             5 + /* channel switch announcement element */
2844                             3 + /* secondary channel offset element */
2845                             8); /* mesh channel switch parameters element */
2846         if (!skb)
2847                 return -ENOMEM;
2848
2849         skb_reserve(skb, local->tx_headroom);
2850         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2851         memset(mgmt, 0, hdr_len);
2852         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2853                                           IEEE80211_STYPE_ACTION);
2854
2855         eth_broadcast_addr(mgmt->da);
2856         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2857         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2858                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2859         } else {
2860                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2861                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2862         }
2863         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2864         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2865         pos = skb_put(skb, 5);
2866         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2867         *pos++ = 3;                                             /* IE length */
2868         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2869         freq = csa_settings->chandef.chan->center_freq;
2870         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2871         *pos++ = csa_settings->count;                           /* count */
2872
2873         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2874                 enum nl80211_channel_type ch_type;
2875
2876                 skb_put(skb, 3);
2877                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2878                 *pos++ = 1;                                     /* IE length */
2879                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2880                 if (ch_type == NL80211_CHAN_HT40PLUS)
2881                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2882                 else
2883                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2884         }
2885
2886         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2887                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2888
2889                 skb_put(skb, 8);
2890                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2891                 *pos++ = 6;                                     /* IE length */
2892                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2893                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2894                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2895                 *pos++ |= csa_settings->block_tx ?
2896                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2897                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2898                 pos += 2;
2899                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2900                 pos += 2;
2901         }
2902
2903         ieee80211_tx_skb(sdata, skb);
2904         return 0;
2905 }
2906
2907 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2908 {
2909         return !(cs == NULL || cs->cipher == 0 ||
2910                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2911                  cs->hdr_len <= cs->key_idx_off ||
2912                  cs->key_idx_shift > 7 ||
2913                  cs->key_idx_mask == 0);
2914 }
2915
2916 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2917 {
2918         int i;
2919
2920         /* Ensure we have enough iftype bitmap space for all iftype values */
2921         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2922
2923         for (i = 0; i < n; i++)
2924                 if (!ieee80211_cs_valid(&cs[i]))
2925                         return false;
2926
2927         return true;
2928 }
2929
2930 const struct ieee80211_cipher_scheme *
2931 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2932                  enum nl80211_iftype iftype)
2933 {
2934         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2935         int n = local->hw.n_cipher_schemes;
2936         int i;
2937         const struct ieee80211_cipher_scheme *cs = NULL;
2938
2939         for (i = 0; i < n; i++) {
2940                 if (l[i].cipher == cipher) {
2941                         cs = &l[i];
2942                         break;
2943                 }
2944         }
2945
2946         if (!cs || !(cs->iftype & BIT(iftype)))
2947                 return NULL;
2948
2949         return cs;
2950 }
2951
2952 int ieee80211_cs_headroom(struct ieee80211_local *local,
2953                           struct cfg80211_crypto_settings *crypto,
2954                           enum nl80211_iftype iftype)
2955 {
2956         const struct ieee80211_cipher_scheme *cs;
2957         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2958         int i;
2959
2960         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2961                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2962                                       iftype);
2963
2964                 if (cs && headroom < cs->hdr_len)
2965                         headroom = cs->hdr_len;
2966         }
2967
2968         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2969         if (cs && headroom < cs->hdr_len)
2970                 headroom = cs->hdr_len;
2971
2972         return headroom;
2973 }
2974
2975 static bool
2976 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2977 {
2978         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2979         int skip;
2980
2981         if (end > 0)
2982                 return false;
2983
2984         /* End time is in the past, check for repetitions */
2985         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2986         if (data->count[i] < 255) {
2987                 if (data->count[i] <= skip) {
2988                         data->count[i] = 0;
2989                         return false;
2990                 }
2991
2992                 data->count[i] -= skip;
2993         }
2994
2995         data->desc[i].start += skip * data->desc[i].interval;
2996
2997         return true;
2998 }
2999
3000 static bool
3001 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3002                              s32 *offset)
3003 {
3004         bool ret = false;
3005         int i;
3006
3007         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3008                 s32 cur;
3009
3010                 if (!data->count[i])
3011                         continue;
3012
3013                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3014                         ret = true;
3015
3016                 cur = data->desc[i].start - tsf;
3017                 if (cur > *offset)
3018                         continue;
3019
3020                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3021                 if (cur > *offset)
3022                         *offset = cur;
3023         }
3024
3025         return ret;
3026 }
3027
3028 static u32
3029 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3030 {
3031         s32 offset = 0;
3032         int tries = 0;
3033         /*
3034          * arbitrary limit, used to avoid infinite loops when combined NoA
3035          * descriptors cover the full time period.
3036          */
3037         int max_tries = 5;
3038
3039         ieee80211_extend_absent_time(data, tsf, &offset);
3040         do {
3041                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3042                         break;
3043
3044                 tries++;
3045         } while (tries < max_tries);
3046
3047         return offset;
3048 }
3049
3050 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3051 {
3052         u32 next_offset = BIT(31) - 1;
3053         int i;
3054
3055         data->absent = 0;
3056         data->has_next_tsf = false;
3057         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3058                 s32 start;
3059
3060                 if (!data->count[i])
3061                         continue;
3062
3063                 ieee80211_extend_noa_desc(data, tsf, i);
3064                 start = data->desc[i].start - tsf;
3065                 if (start <= 0)
3066                         data->absent |= BIT(i);
3067
3068                 if (next_offset > start)
3069                         next_offset = start;
3070
3071                 data->has_next_tsf = true;
3072         }
3073
3074         if (data->absent)
3075                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3076
3077         data->next_tsf = tsf + next_offset;
3078 }
3079 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3080
3081 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3082                             struct ieee80211_noa_data *data, u32 tsf)
3083 {
3084         int ret = 0;
3085         int i;
3086
3087         memset(data, 0, sizeof(*data));
3088
3089         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3090                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3091
3092                 if (!desc->count || !desc->duration)
3093                         continue;
3094
3095                 data->count[i] = desc->count;
3096                 data->desc[i].start = le32_to_cpu(desc->start_time);
3097                 data->desc[i].duration = le32_to_cpu(desc->duration);
3098                 data->desc[i].interval = le32_to_cpu(desc->interval);
3099
3100                 if (data->count[i] > 1 &&
3101                     data->desc[i].interval < data->desc[i].duration)
3102                         continue;
3103
3104                 ieee80211_extend_noa_desc(data, tsf, i);
3105                 ret++;
3106         }
3107
3108         if (ret)
3109                 ieee80211_update_p2p_noa(data, tsf);
3110
3111         return ret;
3112 }
3113 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3114
3115 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3116                            struct ieee80211_sub_if_data *sdata)
3117 {
3118         u64 tsf = drv_get_tsf(local, sdata);
3119         u64 dtim_count = 0;
3120         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3121         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3122         struct ps_data *ps;
3123         u8 bcns_from_dtim;
3124
3125         if (tsf == -1ULL || !beacon_int || !dtim_period)
3126                 return;
3127
3128         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3129             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3130                 if (!sdata->bss)
3131                         return;
3132
3133                 ps = &sdata->bss->ps;
3134         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3135                 ps = &sdata->u.mesh.ps;
3136         } else {
3137                 return;
3138         }
3139
3140         /*
3141          * actually finds last dtim_count, mac80211 will update in
3142          * __beacon_add_tim().
3143          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3144          */
3145         do_div(tsf, beacon_int);
3146         bcns_from_dtim = do_div(tsf, dtim_period);
3147         /* just had a DTIM */
3148         if (!bcns_from_dtim)
3149                 dtim_count = 0;
3150         else
3151                 dtim_count = dtim_period - bcns_from_dtim;
3152
3153         ps->dtim_count = dtim_count;
3154 }
3155
3156 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3157                                          struct ieee80211_chanctx *ctx)
3158 {
3159         struct ieee80211_sub_if_data *sdata;
3160         u8 radar_detect = 0;
3161
3162         lockdep_assert_held(&local->chanctx_mtx);
3163
3164         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3165                 return 0;
3166
3167         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3168                 if (sdata->reserved_radar_required)
3169                         radar_detect |= BIT(sdata->reserved_chandef.width);
3170
3171         /*
3172          * An in-place reservation context should not have any assigned vifs
3173          * until it replaces the other context.
3174          */
3175         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3176                 !list_empty(&ctx->assigned_vifs));
3177
3178         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3179                 if (sdata->radar_required)
3180                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3181
3182         return radar_detect;
3183 }
3184
3185 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3186                                  const struct cfg80211_chan_def *chandef,
3187                                  enum ieee80211_chanctx_mode chanmode,
3188                                  u8 radar_detect)
3189 {
3190         struct ieee80211_local *local = sdata->local;
3191         struct ieee80211_sub_if_data *sdata_iter;
3192         enum nl80211_iftype iftype = sdata->wdev.iftype;
3193         int num[NUM_NL80211_IFTYPES];
3194         struct ieee80211_chanctx *ctx;
3195         int num_different_channels = 0;
3196         int total = 1;
3197
3198         lockdep_assert_held(&local->chanctx_mtx);
3199
3200         if (WARN_ON(hweight32(radar_detect) > 1))
3201                 return -EINVAL;
3202
3203         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3204                     !chandef->chan))
3205                 return -EINVAL;
3206
3207         if (chandef)
3208                 num_different_channels = 1;
3209
3210         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3211                 return -EINVAL;
3212
3213         /* Always allow software iftypes */
3214         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3215                 if (radar_detect)
3216                         return -EINVAL;
3217                 return 0;
3218         }
3219
3220         memset(num, 0, sizeof(num));
3221
3222         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3223                 num[iftype] = 1;
3224
3225         list_for_each_entry(ctx, &local->chanctx_list, list) {
3226                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3227                         continue;
3228                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3229                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3230                         num_different_channels++;
3231                         continue;
3232                 }
3233                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3234                     cfg80211_chandef_compatible(chandef,
3235                                                 &ctx->conf.def))
3236                         continue;
3237                 num_different_channels++;
3238         }
3239
3240         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3241                 struct wireless_dev *wdev_iter;
3242
3243                 wdev_iter = &sdata_iter->wdev;
3244
3245                 if (sdata_iter == sdata ||
3246                     !ieee80211_sdata_running(sdata_iter) ||
3247                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3248                         continue;
3249
3250                 num[wdev_iter->iftype]++;
3251                 total++;
3252         }
3253
3254         if (total == 1 && !radar_detect)
3255                 return 0;
3256
3257         return cfg80211_check_combinations(local->hw.wiphy,
3258                                            num_different_channels,
3259                                            radar_detect, num);
3260 }
3261
3262 static void
3263 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3264                          void *data)
3265 {
3266         u32 *max_num_different_channels = data;
3267
3268         *max_num_different_channels = max(*max_num_different_channels,
3269                                           c->num_different_channels);
3270 }
3271
3272 int ieee80211_max_num_channels(struct ieee80211_local *local)
3273 {
3274         struct ieee80211_sub_if_data *sdata;
3275         int num[NUM_NL80211_IFTYPES] = {};
3276         struct ieee80211_chanctx *ctx;
3277         int num_different_channels = 0;
3278         u8 radar_detect = 0;
3279         u32 max_num_different_channels = 1;
3280         int err;
3281
3282         lockdep_assert_held(&local->chanctx_mtx);
3283
3284         list_for_each_entry(ctx, &local->chanctx_list, list) {
3285                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3286                         continue;
3287
3288                 num_different_channels++;
3289
3290                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3291         }
3292
3293         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3294                 num[sdata->wdev.iftype]++;
3295
3296         err = cfg80211_iter_combinations(local->hw.wiphy,
3297                                          num_different_channels, radar_detect,
3298                                          num, ieee80211_iter_max_chans,
3299                                          &max_num_different_channels);
3300         if (err < 0)
3301                 return err;
3302
3303         return max_num_different_channels;
3304 }
3305
3306 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3307 {
3308         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3309         *buf++ = 7; /* len */
3310         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3311         *buf++ = 0x50;
3312         *buf++ = 0xf2;
3313         *buf++ = 2; /* WME */
3314         *buf++ = 0; /* WME info */
3315         *buf++ = 1; /* WME ver */
3316         *buf++ = qosinfo; /* U-APSD no in use */
3317
3318         return buf;
3319 }
3320
3321 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3322                              struct sta_info *sta,
3323                              struct txq_info *txqi, int tid)
3324 {
3325         skb_queue_head_init(&txqi->queue);
3326         txqi->txq.vif = &sdata->vif;
3327
3328         if (sta) {
3329                 txqi->txq.sta = &sta->sta;
3330                 sta->sta.txq[tid] = &txqi->txq;
3331                 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3332         } else {
3333                 sdata->vif.txq = &txqi->txq;
3334                 txqi->txq.ac = IEEE80211_AC_BE;
3335         }
3336 }