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 (ac_queue == queue ||
 312                             (sdata->vif.cab_queue == queue &&
 313                              local->queue_stop_reasons[ac_queue] == 0 &&
 314                              skb_queue_empty(&local->pending[ac_queue])))
 315                                 netif_wake_subqueue(sdata->dev, ac);
 316                 }
 317         }
 318 }
 319
 320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 321                                    enum queue_stop_reason reason,
 322                                    bool refcounted)
 323 {
 324         struct ieee80211_local *local = hw_to_local(hw);
 325
 326         trace_wake_queue(local, queue, reason);
 327
 328         if (WARN_ON(queue >= hw->queues))
 329                 return;
 330
 331         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 332                 return;
 333
 334         if (!refcounted)
 335                 local->q_stop_reasons[queue][reason] = 0;
 336         else
 337                 local->q_stop_reasons[queue][reason]--;
 338
 339         if (local->q_stop_reasons[queue][reason] == 0)
 340                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 341
 342         if (local->queue_stop_reasons[queue] != 0)
 343                 /* someone still has this queue stopped */
 344                 return;
 345
 346         if (skb_queue_empty(&local->pending[queue])) {
 347                 rcu_read_lock();
 348                 ieee80211_propagate_queue_wake(local, queue);
 349                 rcu_read_unlock();
 350         } else
 351                 tasklet_schedule(&local->tx_pending_tasklet);
 352 }
 353
 354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 355                                     enum queue_stop_reason reason,
 356                                     bool refcounted)
 357 {
 358         struct ieee80211_local *local = hw_to_local(hw);
 359         unsigned long flags;
 360
 361         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 362         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 363         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 364 }
 365
 366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 367 {
 368         ieee80211_wake_queue_by_reason(hw, queue,
 369                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 370                                        false);
 371 }
 372 EXPORT_SYMBOL(ieee80211_wake_queue);
 373
 374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 375                                    enum queue_stop_reason reason,
 376                                    bool refcounted)
 377 {
 378         struct ieee80211_local *local = hw_to_local(hw);
 379         struct ieee80211_sub_if_data *sdata;
 380         int n_acs = IEEE80211_NUM_ACS;
 381
 382         trace_stop_queue(local, queue, reason);
 383
 384         if (WARN_ON(queue >= hw->queues))
 385                 return;
 386
 387         if (!refcounted)
 388                 local->q_stop_reasons[queue][reason] = 1;
 389         else
 390                 local->q_stop_reasons[queue][reason]++;
 391
 392         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (local->hw.queues < IEEE80211_NUM_ACS)
 396                 n_acs = 1;
 397
 398         rcu_read_lock();
 399         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 400                 int ac;
 401
 402                 if (!sdata->dev)
 403                         continue;
 404
 405                 for (ac = 0; ac < n_acs; ac++) {
 406                         if (sdata->vif.hw_queue[ac] == queue ||
 407                             sdata->vif.cab_queue == queue)
 408                                 netif_stop_subqueue(sdata->dev, ac);
 409                 }
 410         }
 411         rcu_read_unlock();
 412 }
 413
 414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 415                                     enum queue_stop_reason reason,
 416                                     bool refcounted)
 417 {
 418         struct ieee80211_local *local = hw_to_local(hw);
 419         unsigned long flags;
 420
 421         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 422         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 423         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 424 }
 425
 426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 427 {
 428         ieee80211_stop_queue_by_reason(hw, queue,
 429                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 430                                        false);
 431 }
 432 EXPORT_SYMBOL(ieee80211_stop_queue);
 433
 434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 435                                struct sk_buff *skb)
 436 {
 437         struct ieee80211_hw *hw = &local->hw;
 438         unsigned long flags;
 439         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 440         int queue = info->hw_queue;
 441
 442         if (WARN_ON(!info->control.vif)) {
 443                 ieee80211_free_txskb(&local->hw, skb);
 444                 return;
 445         }
 446
 447         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 448         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 449                                false);
 450         __skb_queue_tail(&local->pending[queue], skb);
 451         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 452                                false);
 453         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 454 }
 455
 456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 457                                 struct sk_buff_head *skbs)
 458 {
 459         struct ieee80211_hw *hw = &local->hw;
 460         struct sk_buff *skb;
 461         unsigned long flags;
 462         int queue, i;
 463
 464         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 465         while ((skb = skb_dequeue(skbs))) {
 466                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 467
 468                 if (WARN_ON(!info->control.vif)) {
 469                         ieee80211_free_txskb(&local->hw, skb);
 470                         continue;
 471                 }
 472
 473                 queue = info->hw_queue;
 474
 475                 __ieee80211_stop_queue(hw, queue,
 476                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 477                                 false);
 478
 479                 __skb_queue_tail(&local->pending[queue], skb);
 480         }
 481
 482         for (i = 0; i < hw->queues; i++)
 483                 __ieee80211_wake_queue(hw, i,
 484                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 485                         false);
 486         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 487 }
 488
 489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 490                                      unsigned long queues,
 491                                      enum queue_stop_reason reason,
 492                                      bool refcounted)
 493 {
 494         struct ieee80211_local *local = hw_to_local(hw);
 495         unsigned long flags;
 496         int i;
 497
 498         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 499
 500         for_each_set_bit(i, &queues, hw->queues)
 501                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 502
 503         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 504 }
 505
 506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 507 {
 508         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 509                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 510                                         false);
 511 }
 512 EXPORT_SYMBOL(ieee80211_stop_queues);
 513
 514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 515 {
 516         struct ieee80211_local *local = hw_to_local(hw);
 517         unsigned long flags;
 518         int ret;
 519
 520         if (WARN_ON(queue >= hw->queues))
 521                 return true;
 522
 523         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 524         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 525                        &local->queue_stop_reasons[queue]);
 526         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 527         return ret;
 528 }
 529 EXPORT_SYMBOL(ieee80211_queue_stopped);
 530
 531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 532                                      unsigned long queues,
 533                                      enum queue_stop_reason reason,
 534                                      bool refcounted)
 535 {
 536         struct ieee80211_local *local = hw_to_local(hw);
 537         unsigned long flags;
 538         int i;
 539
 540         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 541
 542         for_each_set_bit(i, &queues, hw->queues)
 543                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 544
 545         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 546 }
 547
 548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 549 {
 550         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 551                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 552                                         false);
 553 }
 554 EXPORT_SYMBOL(ieee80211_wake_queues);
 555
 556 static unsigned int
 557 ieee80211_get_vif_queues(struct ieee80211_local *local,
 558                          struct ieee80211_sub_if_data *sdata)
 559 {
 560         unsigned int queues;
 561
 562         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 563                 int ac;
 564
 565                 queues = 0;
 566
 567                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 568                         queues |= BIT(sdata->vif.hw_queue[ac]);
 569                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 570                         queues |= BIT(sdata->vif.cab_queue);
 571         } else {
 572                 /* all queues */
 573                 queues = BIT(local->hw.queues) - 1;
 574         }
 575
 576         return queues;
 577 }
 578
 579 void ieee80211_flush_queues(struct ieee80211_local *local,
 580                             struct ieee80211_sub_if_data *sdata)
 581 {
 582         unsigned int queues;
 583
 584         if (!local->ops->flush)
 585                 return;
 586
 587         queues = ieee80211_get_vif_queues(local, sdata);
 588
 589         ieee80211_stop_queues_by_reason(&local->hw, queues,
 590                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 591                                         false);
 592
 593         drv_flush(local, sdata, queues, false);
 594
 595         ieee80211_wake_queues_by_reason(&local->hw, queues,
 596                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 597                                         false);
 598 }
 599
 600 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 601                                struct ieee80211_sub_if_data *sdata,
 602                                enum queue_stop_reason reason)
 603 {
 604         ieee80211_stop_queues_by_reason(&local->hw,
 605                                         ieee80211_get_vif_queues(local, sdata),
 606                                         reason, true);
 607 }
 608
 609 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 610                                struct ieee80211_sub_if_data *sdata,
 611                                enum queue_stop_reason reason)
 612 {
 613         ieee80211_wake_queues_by_reason(&local->hw,
 614                                         ieee80211_get_vif_queues(local, sdata),
 615                                         reason, true);
 616 }
 617
 618 static void __iterate_active_interfaces(struct ieee80211_local *local,
 619                                         u32 iter_flags,
 620                                         void (*iterator)(void *data, u8 *mac,
 621                                                 struct ieee80211_vif *vif),
 622                                         void *data)
 623 {
 624         struct ieee80211_sub_if_data *sdata;
 625
 626         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 627                 switch (sdata->vif.type) {
 628                 case NL80211_IFTYPE_MONITOR:
 629                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 630                                 continue;
 631                         break;
 632                 case NL80211_IFTYPE_AP_VLAN:
 633                         continue;
 634                 default:
 635                         break;
 636                 }
 637                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 638                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 639                         continue;
 640                 if (ieee80211_sdata_running(sdata))
 641                         iterator(data, sdata->vif.addr,
 642                                  &sdata->vif);
 643         }
 644
 645         sdata = rcu_dereference_check(local->monitor_sdata,
 646                                       lockdep_is_held(&local->iflist_mtx) ||
 647                                       lockdep_rtnl_is_held());
 648         if (sdata &&
 649             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 650              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 651                 iterator(data, sdata->vif.addr, &sdata->vif);
 652 }
 653
 654 void ieee80211_iterate_active_interfaces(
 655         struct ieee80211_hw *hw, u32 iter_flags,
 656         void (*iterator)(void *data, u8 *mac,
 657                          struct ieee80211_vif *vif),
 658         void *data)
 659 {
 660         struct ieee80211_local *local = hw_to_local(hw);
 661
 662         mutex_lock(&local->iflist_mtx);
 663         __iterate_active_interfaces(local, iter_flags, iterator, data);
 664         mutex_unlock(&local->iflist_mtx);
 665 }
 666 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 667
 668 void ieee80211_iterate_active_interfaces_atomic(
 669         struct ieee80211_hw *hw, u32 iter_flags,
 670         void (*iterator)(void *data, u8 *mac,
 671                          struct ieee80211_vif *vif),
 672         void *data)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675
 676         rcu_read_lock();
 677         __iterate_active_interfaces(local, iter_flags, iterator, data);
 678         rcu_read_unlock();
 679 }
 680 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 681
 682 void ieee80211_iterate_active_interfaces_rtnl(
 683         struct ieee80211_hw *hw, u32 iter_flags,
 684         void (*iterator)(void *data, u8 *mac,
 685                          struct ieee80211_vif *vif),
 686         void *data)
 687 {
 688         struct ieee80211_local *local = hw_to_local(hw);
 689
 690         ASSERT_RTNL();
 691
 692         __iterate_active_interfaces(local, iter_flags, iterator, data);
 693 }
 694 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 695
 696 static void __iterate_stations(struct ieee80211_local *local,
 697                                void (*iterator)(void *data,
 698                                                 struct ieee80211_sta *sta),
 699                                void *data)
 700 {
 701         struct sta_info *sta;
 702
 703         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 704                 if (!sta->uploaded)
 705                         continue;
 706
 707                 iterator(data, &sta->sta);
 708         }
 709 }
 710
 711 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 712                         void (*iterator)(void *data,
 713                                          struct ieee80211_sta *sta),
 714                         void *data)
 715 {
 716         struct ieee80211_local *local = hw_to_local(hw);
 717
 718         rcu_read_lock();
 719         __iterate_stations(local, iterator, data);
 720         rcu_read_unlock();
 721 }
 722 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 723
 724 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 725 {
 726         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 727
 728         if (!ieee80211_sdata_running(sdata) ||
 729             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 730                 return NULL;
 731         return &sdata->vif;
 732 }
 733 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 734
 735 /*
 736  * Nothing should have been stuffed into the workqueue during
 737  * the suspend->resume cycle. If this WARN is seen then there
 738  * is a bug with either the driver suspend or something in
 739  * mac80211 stuffing into the workqueue which we haven't yet
 740  * cleared during mac80211's suspend cycle.
 741  */
 742 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 743 {
 744         if (WARN(local->suspended && !local->resuming,
 745                  "queueing ieee80211 work while going to suspend\n"))
 746                 return false;
 747
 748         return true;
 749 }
 750
 751 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 752 {
 753         struct ieee80211_local *local = hw_to_local(hw);
 754
 755         if (!ieee80211_can_queue_work(local))
 756                 return;
 757
 758         queue_work(local->workqueue, work);
 759 }
 760 EXPORT_SYMBOL(ieee80211_queue_work);
 761
 762 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 763                                   struct delayed_work *dwork,
 764                                   unsigned long delay)
 765 {
 766         struct ieee80211_local *local = hw_to_local(hw);
 767
 768         if (!ieee80211_can_queue_work(local))
 769                 return;
 770
 771         queue_delayed_work(local->workqueue, dwork, delay);
 772 }
 773 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 774
 775 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 776                                struct ieee802_11_elems *elems,
 777                                u64 filter, u32 crc)
 778 {
 779         size_t left = len;
 780         const u8 *pos = start;
 781         bool calc_crc = filter != 0;
 782         DECLARE_BITMAP(seen_elems, 256);
 783         const u8 *ie;
 784
 785         bitmap_zero(seen_elems, 256);
 786         memset(elems, 0, sizeof(*elems));
 787         elems->ie_start = start;
 788         elems->total_len = len;
 789
 790         while (left >= 2) {
 791                 u8 id, elen;
 792                 bool elem_parse_failed;
 793
 794                 id = *pos++;
 795                 elen = *pos++;
 796                 left -= 2;
 797
 798                 if (elen > left) {
 799                         elems->parse_error = true;
 800                         break;
 801                 }
 802
 803                 switch (id) {
 804                 case WLAN_EID_SSID:
 805                 case WLAN_EID_SUPP_RATES:
 806                 case WLAN_EID_FH_PARAMS:
 807                 case WLAN_EID_DS_PARAMS:
 808                 case WLAN_EID_CF_PARAMS:
 809                 case WLAN_EID_TIM:
 810                 case WLAN_EID_IBSS_PARAMS:
 811                 case WLAN_EID_CHALLENGE:
 812                 case WLAN_EID_RSN:
 813                 case WLAN_EID_ERP_INFO:
 814                 case WLAN_EID_EXT_SUPP_RATES:
 815                 case WLAN_EID_HT_CAPABILITY:
 816                 case WLAN_EID_HT_OPERATION:
 817                 case WLAN_EID_VHT_CAPABILITY:
 818                 case WLAN_EID_VHT_OPERATION:
 819                 case WLAN_EID_MESH_ID:
 820                 case WLAN_EID_MESH_CONFIG:
 821                 case WLAN_EID_PEER_MGMT:
 822                 case WLAN_EID_PREQ:
 823                 case WLAN_EID_PREP:
 824                 case WLAN_EID_PERR:
 825                 case WLAN_EID_RANN:
 826                 case WLAN_EID_CHANNEL_SWITCH:
 827                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 828                 case WLAN_EID_COUNTRY:
 829                 case WLAN_EID_PWR_CONSTRAINT:
 830                 case WLAN_EID_TIMEOUT_INTERVAL:
 831                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 832                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 833                 case WLAN_EID_CHAN_SWITCH_PARAM:
 834                 /*
 835                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 836                  * that if the content gets bigger it might be needed more than once
 837                  */
 838                         if (test_bit(id, seen_elems)) {
 839                                 elems->parse_error = true;
 840                                 left -= elen;
 841                                 pos += elen;
 842                                 continue;
 843                         }
 844                         break;
 845                 }
 846
 847                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 848                         crc = crc32_be(crc, pos - 2, elen + 2);
 849
 850                 elem_parse_failed = false;
 851
 852                 switch (id) {
 853                 case WLAN_EID_SSID:
 854                         elems->ssid = pos;
 855                         elems->ssid_len = elen;
 856                         break;
 857                 case WLAN_EID_SUPP_RATES:
 858                         elems->supp_rates = pos;
 859                         elems->supp_rates_len = elen;
 860                         break;
 861                 case WLAN_EID_DS_PARAMS:
 862                         if (elen >= 1)
 863                                 elems->ds_params = pos;
 864                         else
 865                                 elem_parse_failed = true;
 866                         break;
 867                 case WLAN_EID_TIM:
 868                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 869                                 elems->tim = (void *)pos;
 870                                 elems->tim_len = elen;
 871                         } else
 872                                 elem_parse_failed = true;
 873                         break;
 874                 case WLAN_EID_CHALLENGE:
 875                         elems->challenge = pos;
 876                         elems->challenge_len = elen;
 877                         break;
 878                 case WLAN_EID_VENDOR_SPECIFIC:
 879                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 880                             pos[2] == 0xf2) {
 881                                 /* Microsoft OUI (00:50:F2) */
 882
 883                                 if (calc_crc)
 884                                         crc = crc32_be(crc, pos - 2, elen + 2);
 885
 886                                 if (elen >= 5 && pos[3] == 2) {
 887                                         /* OUI Type 2 - WMM IE */
 888                                         if (pos[4] == 0) {
 889                                                 elems->wmm_info = pos;
 890                                                 elems->wmm_info_len = elen;
 891                                         } else if (pos[4] == 1) {
 892                                                 elems->wmm_param = pos;
 893                                                 elems->wmm_param_len = elen;
 894                                         }
 895                                 }
 896                         }
 897                         break;
 898                 case WLAN_EID_RSN:
 899                         elems->rsn = pos;
 900                         elems->rsn_len = elen;
 901                         break;
 902                 case WLAN_EID_ERP_INFO:
 903                         if (elen >= 1)
 904                                 elems->erp_info = pos;
 905                         else
 906                                 elem_parse_failed = true;
 907                         break;
 908                 case WLAN_EID_EXT_SUPP_RATES:
 909                         elems->ext_supp_rates = pos;
 910                         elems->ext_supp_rates_len = elen;
 911                         break;
 912                 case WLAN_EID_HT_CAPABILITY:
 913                         if (elen >= sizeof(struct ieee80211_ht_cap))
 914                                 elems->ht_cap_elem = (void *)pos;
 915                         else
 916                                 elem_parse_failed = true;
 917                         break;
 918                 case WLAN_EID_HT_OPERATION:
 919                         if (elen >= sizeof(struct ieee80211_ht_operation))
 920                                 elems->ht_operation = (void *)pos;
 921                         else
 922                                 elem_parse_failed = true;
 923                         break;
 924                 case WLAN_EID_VHT_CAPABILITY:
 925                         if (elen >= sizeof(struct ieee80211_vht_cap))
 926                                 elems->vht_cap_elem = (void *)pos;
 927                         else
 928                                 elem_parse_failed = true;
 929                         break;
 930                 case WLAN_EID_VHT_OPERATION:
 931                         if (elen >= sizeof(struct ieee80211_vht_operation))
 932                                 elems->vht_operation = (void *)pos;
 933                         else
 934                                 elem_parse_failed = true;
 935                         break;
 936                 case WLAN_EID_OPMODE_NOTIF:
 937                         if (elen > 0)
 938                                 elems->opmode_notif = pos;
 939                         else
 940                                 elem_parse_failed = true;
 941                         break;
 942                 case WLAN_EID_MESH_ID:
 943                         elems->mesh_id = pos;
 944                         elems->mesh_id_len = elen;
 945                         break;
 946                 case WLAN_EID_MESH_CONFIG:
 947                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 948                                 elems->mesh_config = (void *)pos;
 949                         else
 950                                 elem_parse_failed = true;
 951                         break;
 952                 case WLAN_EID_PEER_MGMT:
 953                         elems->peering = pos;
 954                         elems->peering_len = elen;
 955                         break;
 956                 case WLAN_EID_MESH_AWAKE_WINDOW:
 957                         if (elen >= 2)
 958                                 elems->awake_window = (void *)pos;
 959                         break;
 960                 case WLAN_EID_PREQ:
 961                         elems->preq = pos;
 962                         elems->preq_len = elen;
 963                         break;
 964                 case WLAN_EID_PREP:
 965                         elems->prep = pos;
 966                         elems->prep_len = elen;
 967                         break;
 968                 case WLAN_EID_PERR:
 969                         elems->perr = pos;
 970                         elems->perr_len = elen;
 971                         break;
 972                 case WLAN_EID_RANN:
 973                         if (elen >= sizeof(struct ieee80211_rann_ie))
 974                                 elems->rann = (void *)pos;
 975                         else
 976                                 elem_parse_failed = true;
 977                         break;
 978                 case WLAN_EID_CHANNEL_SWITCH:
 979                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 980                                 elem_parse_failed = true;
 981                                 break;
 982                         }
 983                         elems->ch_switch_ie = (void *)pos;
 984                         break;
 985                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 986                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
 987                                 elem_parse_failed = true;
 988                                 break;
 989                         }
 990                         elems->ext_chansw_ie = (void *)pos;
 991                         break;
 992                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 993                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
 994                                 elem_parse_failed = true;
 995                                 break;
 996                         }
 997                         elems->sec_chan_offs = (void *)pos;
 998                         break;
 999                 case WLAN_EID_CHAN_SWITCH_PARAM:
1000                         if (elen !=
1001                             sizeof(*elems->mesh_chansw_params_ie)) {
1002                                 elem_parse_failed = true;
1003                                 break;
1004                         }
1005                         elems->mesh_chansw_params_ie = (void *)pos;
1006                         break;
1007                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1008                         if (!action ||
1009                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1010                                 elem_parse_failed = true;
1011                                 break;
1012                         }
1013                         elems->wide_bw_chansw_ie = (void *)pos;
1014                         break;
1015                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1016                         if (action) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         /*
1021                          * This is a bit tricky, but as we only care about
1022                          * the wide bandwidth channel switch element, so
1023                          * just parse it out manually.
1024                          */
1025                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1026                                               pos, elen);
1027                         if (ie) {
1028                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1029                                         elems->wide_bw_chansw_ie =
1030                                                 (void *)(ie + 2);
1031                                 else
1032                                         elem_parse_failed = true;
1033                         }
1034                         break;
1035                 case WLAN_EID_COUNTRY:
1036                         elems->country_elem = pos;
1037                         elems->country_elem_len = elen;
1038                         break;
1039                 case WLAN_EID_PWR_CONSTRAINT:
1040                         if (elen != 1) {
1041                                 elem_parse_failed = true;
1042                                 break;
1043                         }
1044                         elems->pwr_constr_elem = pos;
1045                         break;
1046                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1047                         /* Lots of different options exist, but we only care
1048                          * about the Dynamic Transmit Power Control element.
1049                          * First check for the Cisco OUI, then for the DTPC
1050                          * tag (0x00).
1051                          */
1052                         if (elen < 4) {
1053                                 elem_parse_failed = true;
1054                                 break;
1055                         }
1056
1057                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1058                             pos[2] != 0x96 || pos[3] != 0x00)
1059                                 break;
1060
1061                         if (elen != 6) {
1062                                 elem_parse_failed = true;
1063                                 break;
1064                         }
1065
1066                         if (calc_crc)
1067                                 crc = crc32_be(crc, pos - 2, elen + 2);
1068
1069                         elems->cisco_dtpc_elem = pos;
1070                         break;
1071                 case WLAN_EID_TIMEOUT_INTERVAL:
1072                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1073                                 elems->timeout_int = (void *)pos;
1074                         else
1075                                 elem_parse_failed = true;
1076                         break;
1077                 default:
1078                         break;
1079                 }
1080
1081                 if (elem_parse_failed)
1082                         elems->parse_error = true;
1083                 else
1084                         __set_bit(id, seen_elems);
1085
1086                 left -= elen;
1087                 pos += elen;
1088         }
1089
1090         if (left != 0)
1091                 elems->parse_error = true;
1092
1093         return crc;
1094 }
1095
1096 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1097                                bool bss_notify)
1098 {
1099         struct ieee80211_local *local = sdata->local;
1100         struct ieee80211_tx_queue_params qparam;
1101         struct ieee80211_chanctx_conf *chanctx_conf;
1102         int ac;
1103         bool use_11b, enable_qos;
1104         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1105         int aCWmin, aCWmax;
1106
1107         if (!local->ops->conf_tx)
1108                 return;
1109
1110         if (local->hw.queues < IEEE80211_NUM_ACS)
1111                 return;
1112
1113         memset(&qparam, 0, sizeof(qparam));
1114
1115         rcu_read_lock();
1116         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1117         use_11b = (chanctx_conf &&
1118                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1119                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1120         rcu_read_unlock();
1121
1122         /*
1123          * By default disable QoS in STA mode for old access points, which do
1124          * not support 802.11e. New APs will provide proper queue parameters,
1125          * that we will configure later.
1126          */
1127         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1128
1129         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1130
1131         /* Set defaults according to 802.11-2007 Table 7-37 */
1132         aCWmax = 1023;
1133         if (use_11b)
1134                 aCWmin = 31;
1135         else
1136                 aCWmin = 15;
1137
1138         /* Confiure old 802.11b/g medium access rules. */
1139         qparam.cw_max = aCWmax;
1140         qparam.cw_min = aCWmin;
1141         qparam.txop = 0;
1142         qparam.aifs = 2;
1143
1144         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1145                 /* Update if QoS is enabled. */
1146                 if (enable_qos) {
1147                         switch (ac) {
1148                         case IEEE80211_AC_BK:
1149                                 qparam.cw_max = aCWmax;
1150                                 qparam.cw_min = aCWmin;
1151                                 qparam.txop = 0;
1152                                 if (is_ocb)
1153                                         qparam.aifs = 9;
1154                                 else
1155                                         qparam.aifs = 7;
1156                                 break;
1157                         /* never happens but let's not leave undefined */
1158                         default:
1159                         case IEEE80211_AC_BE:
1160                                 qparam.cw_max = aCWmax;
1161                                 qparam.cw_min = aCWmin;
1162                                 qparam.txop = 0;
1163                                 if (is_ocb)
1164                                         qparam.aifs = 6;
1165                                 else
1166                                         qparam.aifs = 3;
1167                                 break;
1168                         case IEEE80211_AC_VI:
1169                                 qparam.cw_max = aCWmin;
1170                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1171                                 if (is_ocb)
1172                                         qparam.txop = 0;
1173                                 else if (use_11b)
1174                                         qparam.txop = 6016/32;
1175                                 else
1176                                         qparam.txop = 3008/32;
1177
1178                                 if (is_ocb)
1179                                         qparam.aifs = 3;
1180                                 else
1181                                         qparam.aifs = 2;
1182                                 break;
1183                         case IEEE80211_AC_VO:
1184                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1185                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1186                                 if (is_ocb)
1187                                         qparam.txop = 0;
1188                                 else if (use_11b)
1189                                         qparam.txop = 3264/32;
1190                                 else
1191                                         qparam.txop = 1504/32;
1192                                 qparam.aifs = 2;
1193                                 break;
1194                         }
1195                 }
1196
1197                 qparam.uapsd = false;
1198
1199                 sdata->tx_conf[ac] = qparam;
1200                 drv_conf_tx(local, sdata, ac, &qparam);
1201         }
1202
1203         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1204             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1205                 sdata->vif.bss_conf.qos = enable_qos;
1206                 if (bss_notify)
1207                         ieee80211_bss_info_change_notify(sdata,
1208                                                          BSS_CHANGED_QOS);
1209         }
1210 }
1211
1212 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1213                          u16 transaction, u16 auth_alg, u16 status,
1214                          const u8 *extra, size_t extra_len, const u8 *da,
1215                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1216                          u32 tx_flags)
1217 {
1218         struct ieee80211_local *local = sdata->local;
1219         struct sk_buff *skb;
1220         struct ieee80211_mgmt *mgmt;
1221         int err;
1222
1223         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1224         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1225                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1226         if (!skb)
1227                 return;
1228
1229         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1230
1231         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1232         memset(mgmt, 0, 24 + 6);
1233         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1234                                           IEEE80211_STYPE_AUTH);
1235         memcpy(mgmt->da, da, ETH_ALEN);
1236         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1237         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1238         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1239         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1240         mgmt->u.auth.status_code = cpu_to_le16(status);
1241         if (extra)
1242                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1243
1244         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1245                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1246                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1247                 WARN_ON(err);
1248         }
1249
1250         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1251                                         tx_flags;
1252         ieee80211_tx_skb(sdata, skb);
1253 }
1254
1255 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1256                                     const u8 *bssid, u16 stype, u16 reason,
1257                                     bool send_frame, u8 *frame_buf)
1258 {
1259         struct ieee80211_local *local = sdata->local;
1260         struct sk_buff *skb;
1261         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1262
1263         /* build frame */
1264         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1265         mgmt->duration = 0; /* initialize only */
1266         mgmt->seq_ctrl = 0; /* initialize only */
1267         memcpy(mgmt->da, bssid, ETH_ALEN);
1268         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1269         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1270         /* u.deauth.reason_code == u.disassoc.reason_code */
1271         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1272
1273         if (send_frame) {
1274                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1275                                     IEEE80211_DEAUTH_FRAME_LEN);
1276                 if (!skb)
1277                         return;
1278
1279                 skb_reserve(skb, local->hw.extra_tx_headroom);
1280
1281                 /* copy in frame */
1282                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1283                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1284
1285                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1286                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1287                         IEEE80211_SKB_CB(skb)->flags |=
1288                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1289
1290                 ieee80211_tx_skb(sdata, skb);
1291         }
1292 }
1293
1294 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1295                                          u8 *buffer, size_t buffer_len,
1296                                          const u8 *ie, size_t ie_len,
1297                                          enum ieee80211_band band,
1298                                          u32 rate_mask,
1299                                          struct cfg80211_chan_def *chandef,
1300                                          size_t *offset)
1301 {
1302         struct ieee80211_supported_band *sband;
1303         u8 *pos = buffer, *end = buffer + buffer_len;
1304         size_t noffset;
1305         int supp_rates_len, i;
1306         u8 rates[32];
1307         int num_rates;
1308         int ext_rates_len;
1309         int shift;
1310         u32 rate_flags;
1311
1312         *offset = 0;
1313
1314         sband = local->hw.wiphy->bands[band];
1315         if (WARN_ON_ONCE(!sband))
1316                 return 0;
1317
1318         rate_flags = ieee80211_chandef_rate_flags(chandef);
1319         shift = ieee80211_chandef_get_shift(chandef);
1320
1321         num_rates = 0;
1322         for (i = 0; i < sband->n_bitrates; i++) {
1323                 if ((BIT(i) & rate_mask) == 0)
1324                         continue; /* skip rate */
1325                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1326                         continue;
1327
1328                 rates[num_rates++] =
1329                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1330                                           (1 << shift) * 5);
1331         }
1332
1333         supp_rates_len = min_t(int, num_rates, 8);
1334
1335         if (end - pos < 2 + supp_rates_len)
1336                 goto out_err;
1337         *pos++ = WLAN_EID_SUPP_RATES;
1338         *pos++ = supp_rates_len;
1339         memcpy(pos, rates, supp_rates_len);
1340         pos += supp_rates_len;
1341
1342         /* insert "request information" if in custom IEs */
1343         if (ie && ie_len) {
1344                 static const u8 before_extrates[] = {
1345                         WLAN_EID_SSID,
1346                         WLAN_EID_SUPP_RATES,
1347                         WLAN_EID_REQUEST,
1348                 };
1349                 noffset = ieee80211_ie_split(ie, ie_len,
1350                                              before_extrates,
1351                                              ARRAY_SIZE(before_extrates),
1352                                              *offset);
1353                 if (end - pos < noffset - *offset)
1354                         goto out_err;
1355                 memcpy(pos, ie + *offset, noffset - *offset);
1356                 pos += noffset - *offset;
1357                 *offset = noffset;
1358         }
1359
1360         ext_rates_len = num_rates - supp_rates_len;
1361         if (ext_rates_len > 0) {
1362                 if (end - pos < 2 + ext_rates_len)
1363                         goto out_err;
1364                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1365                 *pos++ = ext_rates_len;
1366                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1367                 pos += ext_rates_len;
1368         }
1369
1370         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1371                 if (end - pos < 3)
1372                         goto out_err;
1373                 *pos++ = WLAN_EID_DS_PARAMS;
1374                 *pos++ = 1;
1375                 *pos++ = ieee80211_frequency_to_channel(
1376                                 chandef->chan->center_freq);
1377         }
1378
1379         /* insert custom IEs that go before HT */
1380         if (ie && ie_len) {
1381                 static const u8 before_ht[] = {
1382                         WLAN_EID_SSID,
1383                         WLAN_EID_SUPP_RATES,
1384                         WLAN_EID_REQUEST,
1385                         WLAN_EID_EXT_SUPP_RATES,
1386                         WLAN_EID_DS_PARAMS,
1387                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1388                 };
1389                 noffset = ieee80211_ie_split(ie, ie_len,
1390                                              before_ht, ARRAY_SIZE(before_ht),
1391                                              *offset);
1392                 if (end - pos < noffset - *offset)
1393                         goto out_err;
1394                 memcpy(pos, ie + *offset, noffset - *offset);
1395                 pos += noffset - *offset;
1396                 *offset = noffset;
1397         }
1398
1399         if (sband->ht_cap.ht_supported) {
1400                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1401                         goto out_err;
1402                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1403                                                 sband->ht_cap.cap);
1404         }
1405
1406         /*
1407          * If adding more here, adjust code in main.c
1408          * that calculates local->scan_ies_len.
1409          */
1410
1411         /* insert custom IEs that go before VHT */
1412         if (ie && ie_len) {
1413                 static const u8 before_vht[] = {
1414                         WLAN_EID_SSID,
1415                         WLAN_EID_SUPP_RATES,
1416                         WLAN_EID_REQUEST,
1417                         WLAN_EID_EXT_SUPP_RATES,
1418                         WLAN_EID_DS_PARAMS,
1419                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420                         WLAN_EID_HT_CAPABILITY,
1421                         WLAN_EID_BSS_COEX_2040,
1422                         WLAN_EID_EXT_CAPABILITY,
1423                         WLAN_EID_SSID_LIST,
1424                         WLAN_EID_CHANNEL_USAGE,
1425                         WLAN_EID_INTERWORKING,
1426                         /* mesh ID can't happen here */
1427                         /* 60 GHz can't happen here right now */
1428                 };
1429                 noffset = ieee80211_ie_split(ie, ie_len,
1430                                              before_vht, ARRAY_SIZE(before_vht),
1431                                              *offset);
1432                 if (end - pos < noffset - *offset)
1433                         goto out_err;
1434                 memcpy(pos, ie + *offset, noffset - *offset);
1435                 pos += noffset - *offset;
1436                 *offset = noffset;
1437         }
1438
1439         if (sband->vht_cap.vht_supported) {
1440                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1441                         goto out_err;
1442                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1443                                                  sband->vht_cap.cap);
1444         }
1445
1446         return pos - buffer;
1447  out_err:
1448         WARN_ONCE(1, "not enough space for preq IEs\n");
1449         return pos - buffer;
1450 }
1451
1452 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1453                              size_t buffer_len,
1454                              struct ieee80211_scan_ies *ie_desc,
1455                              const u8 *ie, size_t ie_len,
1456                              u8 bands_used, u32 *rate_masks,
1457                              struct cfg80211_chan_def *chandef)
1458 {
1459         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1460         int i;
1461
1462         memset(ie_desc, 0, sizeof(*ie_desc));
1463
1464         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1465                 if (bands_used & BIT(i)) {
1466                         pos += ieee80211_build_preq_ies_band(local,
1467                                                              buffer + pos,
1468                                                              buffer_len - pos,
1469                                                              ie, ie_len, i,
1470                                                              rate_masks[i],
1471                                                              chandef,
1472                                                              &custom_ie_offset);
1473                         ie_desc->ies[i] = buffer + old_pos;
1474                         ie_desc->len[i] = pos - old_pos;
1475                         old_pos = pos;
1476                 }
1477         }
1478
1479         /* add any remaining custom IEs */
1480         if (ie && ie_len) {
1481                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1482                               "not enough space for preq custom IEs\n"))
1483                         return pos;
1484                 memcpy(buffer + pos, ie + custom_ie_offset,
1485                        ie_len - custom_ie_offset);
1486                 ie_desc->common_ies = buffer + pos;
1487                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1488                 pos += ie_len - custom_ie_offset;
1489         }
1490
1491         return pos;
1492 };
1493
1494 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1495                                           u8 *dst, u32 ratemask,
1496                                           struct ieee80211_channel *chan,
1497                                           const u8 *ssid, size_t ssid_len,
1498                                           const u8 *ie, size_t ie_len,
1499                                           bool directed)
1500 {
1501         struct ieee80211_local *local = sdata->local;
1502         struct cfg80211_chan_def chandef;
1503         struct sk_buff *skb;
1504         struct ieee80211_mgmt *mgmt;
1505         int ies_len;
1506         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1507         struct ieee80211_scan_ies dummy_ie_desc;
1508
1509         /*
1510          * Do not send DS Channel parameter for directed probe requests
1511          * in order to maximize the chance that we get a response.  Some
1512          * badly-behaved APs don't respond when this parameter is included.
1513          */
1514         chandef.width = sdata->vif.bss_conf.chandef.width;
1515         if (directed)
1516                 chandef.chan = NULL;
1517         else
1518                 chandef.chan = chan;
1519
1520         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1521                                      ssid, ssid_len, 100 + ie_len);
1522         if (!skb)
1523                 return NULL;
1524
1525         rate_masks[chan->band] = ratemask;
1526         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1527                                            skb_tailroom(skb), &dummy_ie_desc,
1528                                            ie, ie_len, BIT(chan->band),
1529                                            rate_masks, &chandef);
1530         skb_put(skb, ies_len);
1531
1532         if (dst) {
1533                 mgmt = (struct ieee80211_mgmt *) skb->data;
1534                 memcpy(mgmt->da, dst, ETH_ALEN);
1535                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1536         }
1537
1538         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1539
1540         return skb;
1541 }
1542
1543 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1544                               const u8 *ssid, size_t ssid_len,
1545                               const u8 *ie, size_t ie_len,
1546                               u32 ratemask, bool directed, u32 tx_flags,
1547                               struct ieee80211_channel *channel, bool scan)
1548 {
1549         struct sk_buff *skb;
1550
1551         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1552                                         ssid, ssid_len,
1553                                         ie, ie_len, directed);
1554         if (skb) {
1555                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1556                 if (scan)
1557                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1558                 else
1559                         ieee80211_tx_skb(sdata, skb);
1560         }
1561 }
1562
1563 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1564                             struct ieee802_11_elems *elems,
1565                             enum ieee80211_band band, u32 *basic_rates)
1566 {
1567         struct ieee80211_supported_band *sband;
1568         size_t num_rates;
1569         u32 supp_rates, rate_flags;
1570         int i, j, shift;
1571         sband = sdata->local->hw.wiphy->bands[band];
1572
1573         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1574         shift = ieee80211_vif_get_shift(&sdata->vif);
1575
1576         if (WARN_ON(!sband))
1577                 return 1;
1578
1579         num_rates = sband->n_bitrates;
1580         supp_rates = 0;
1581         for (i = 0; i < elems->supp_rates_len +
1582                      elems->ext_supp_rates_len; i++) {
1583                 u8 rate = 0;
1584                 int own_rate;
1585                 bool is_basic;
1586                 if (i < elems->supp_rates_len)
1587                         rate = elems->supp_rates[i];
1588                 else if (elems->ext_supp_rates)
1589                         rate = elems->ext_supp_rates
1590                                 [i - elems->supp_rates_len];
1591                 own_rate = 5 * (rate & 0x7f);
1592                 is_basic = !!(rate & 0x80);
1593
1594                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1595                         continue;
1596
1597                 for (j = 0; j < num_rates; j++) {
1598                         int brate;
1599                         if ((rate_flags & sband->bitrates[j].flags)
1600                             != rate_flags)
1601                                 continue;
1602
1603                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1604                                              1 << shift);
1605
1606                         if (brate == own_rate) {
1607                                 supp_rates |= BIT(j);
1608                                 if (basic_rates && is_basic)
1609                                         *basic_rates |= BIT(j);
1610                         }
1611                 }
1612         }
1613         return supp_rates;
1614 }
1615
1616 void ieee80211_stop_device(struct ieee80211_local *local)
1617 {
1618         ieee80211_led_radio(local, false);
1619         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1620
1621         cancel_work_sync(&local->reconfig_filter);
1622
1623         flush_workqueue(local->workqueue);
1624         drv_stop(local);
1625 }
1626
1627 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1628 {
1629         struct ieee80211_sub_if_data *sdata;
1630         struct ieee80211_chanctx *ctx;
1631
1632         /*
1633          * We get here if during resume the device can't be restarted properly.
1634          * We might also get here if this happens during HW reset, which is a
1635          * slightly different situation and we need to drop all connections in
1636          * the latter case.
1637          *
1638          * Ask cfg80211 to turn off all interfaces, this will result in more
1639          * warnings but at least we'll then get into a clean stopped state.
1640          */
1641
1642         local->resuming = false;
1643         local->suspended = false;
1644         local->started = false;
1645
1646         /* scheduled scan clearly can't be running any more, but tell
1647          * cfg80211 and clear local state
1648          */
1649         ieee80211_sched_scan_end(local);
1650
1651         list_for_each_entry(sdata, &local->interfaces, list)
1652                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1653
1654         /* Mark channel contexts as not being in the driver any more to avoid
1655          * removing them from the driver during the shutdown process...
1656          */
1657         mutex_lock(&local->chanctx_mtx);
1658         list_for_each_entry(ctx, &local->chanctx_list, list)
1659                 ctx->driver_present = false;
1660         mutex_unlock(&local->chanctx_mtx);
1661
1662         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1663 }
1664
1665 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1666                                      struct ieee80211_sub_if_data *sdata)
1667 {
1668         struct ieee80211_chanctx_conf *conf;
1669         struct ieee80211_chanctx *ctx;
1670
1671         if (!local->use_chanctx)
1672                 return;
1673
1674         mutex_lock(&local->chanctx_mtx);
1675         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1676                                          lockdep_is_held(&local->chanctx_mtx));
1677         if (conf) {
1678                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1679                 drv_assign_vif_chanctx(local, sdata, ctx);
1680         }
1681         mutex_unlock(&local->chanctx_mtx);
1682 }
1683
1684 int ieee80211_reconfig(struct ieee80211_local *local)
1685 {
1686         struct ieee80211_hw *hw = &local->hw;
1687         struct ieee80211_sub_if_data *sdata;
1688         struct ieee80211_chanctx *ctx;
1689         struct sta_info *sta;
1690         int res, i;
1691         bool reconfig_due_to_wowlan = false;
1692         struct ieee80211_sub_if_data *sched_scan_sdata;
1693         bool sched_scan_stopped = false;
1694
1695 #ifdef CONFIG_PM
1696         if (local->suspended)
1697                 local->resuming = true;
1698
1699         if (local->wowlan) {
1700                 res = drv_resume(local);
1701                 local->wowlan = false;
1702                 if (res < 0) {
1703                         local->resuming = false;
1704                         return res;
1705                 }
1706                 if (res == 0)
1707                         goto wake_up;
1708                 WARN_ON(res > 1);
1709                 /*
1710                  * res is 1, which means the driver requested
1711                  * to go through a regular reset on wakeup.
1712                  */
1713                 reconfig_due_to_wowlan = true;
1714         }
1715 #endif
1716         /* everything else happens only if HW was up & running */
1717         if (!local->open_count)
1718                 goto wake_up;
1719
1720         /*
1721          * Upon resume hardware can sometimes be goofy due to
1722          * various platform / driver / bus issues, so restarting
1723          * the device may at times not work immediately. Propagate
1724          * the error.
1725          */
1726         res = drv_start(local);
1727         if (res) {
1728                 if (local->suspended)
1729                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1730                 else
1731                         WARN(1, "Hardware became unavailable during restart.\n");
1732                 ieee80211_handle_reconfig_failure(local);
1733                 return res;
1734         }
1735
1736         /* setup fragmentation threshold */
1737         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1738
1739         /* setup RTS threshold */
1740         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1741
1742         /* reset coverage class */
1743         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1744
1745         ieee80211_led_radio(local, true);
1746         ieee80211_mod_tpt_led_trig(local,
1747                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1748
1749         /* add interfaces */
1750         sdata = rtnl_dereference(local->monitor_sdata);
1751         if (sdata) {
1752                 /* in HW restart it exists already */
1753                 WARN_ON(local->resuming);
1754                 res = drv_add_interface(local, sdata);
1755                 if (WARN_ON(res)) {
1756                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1757                         synchronize_net();
1758                         kfree(sdata);
1759                 }
1760         }
1761
1762         list_for_each_entry(sdata, &local->interfaces, list) {
1763                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1764                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1765                     ieee80211_sdata_running(sdata))
1766                         res = drv_add_interface(local, sdata);
1767         }
1768
1769         /* add channel contexts */
1770         if (local->use_chanctx) {
1771                 mutex_lock(&local->chanctx_mtx);
1772                 list_for_each_entry(ctx, &local->chanctx_list, list)
1773                         if (ctx->replace_state !=
1774                             IEEE80211_CHANCTX_REPLACES_OTHER)
1775                                 WARN_ON(drv_add_chanctx(local, ctx));
1776                 mutex_unlock(&local->chanctx_mtx);
1777
1778                 list_for_each_entry(sdata, &local->interfaces, list) {
1779                         if (!ieee80211_sdata_running(sdata))
1780                                 continue;
1781                         ieee80211_assign_chanctx(local, sdata);
1782                 }
1783
1784                 sdata = rtnl_dereference(local->monitor_sdata);
1785                 if (sdata && ieee80211_sdata_running(sdata))
1786                         ieee80211_assign_chanctx(local, sdata);
1787         }
1788
1789         /* add STAs back */
1790         mutex_lock(&local->sta_mtx);
1791         list_for_each_entry(sta, &local->sta_list, list) {
1792                 enum ieee80211_sta_state state;
1793
1794                 if (!sta->uploaded)
1795                         continue;
1796
1797                 /* AP-mode stations will be added later */
1798                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1799                         continue;
1800
1801                 for (state = IEEE80211_STA_NOTEXIST;
1802                      state < sta->sta_state; state++)
1803                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1804                                               state + 1));
1805         }
1806         mutex_unlock(&local->sta_mtx);
1807
1808         /* reconfigure tx conf */
1809         if (hw->queues >= IEEE80211_NUM_ACS) {
1810                 list_for_each_entry(sdata, &local->interfaces, list) {
1811                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1812                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1813                             !ieee80211_sdata_running(sdata))
1814                                 continue;
1815
1816                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1817                                 drv_conf_tx(local, sdata, i,
1818                                             &sdata->tx_conf[i]);
1819                 }
1820         }
1821
1822         /* reconfigure hardware */
1823         ieee80211_hw_config(local, ~0);
1824
1825         ieee80211_configure_filter(local);
1826
1827         /* Finally also reconfigure all the BSS information */
1828         list_for_each_entry(sdata, &local->interfaces, list) {
1829                 u32 changed;
1830
1831                 if (!ieee80211_sdata_running(sdata))
1832                         continue;
1833
1834                 /* common change flags for all interface types */
1835                 changed = BSS_CHANGED_ERP_CTS_PROT |
1836                           BSS_CHANGED_ERP_PREAMBLE |
1837                           BSS_CHANGED_ERP_SLOT |
1838                           BSS_CHANGED_HT |
1839                           BSS_CHANGED_BASIC_RATES |
1840                           BSS_CHANGED_BEACON_INT |
1841                           BSS_CHANGED_BSSID |
1842                           BSS_CHANGED_CQM |
1843                           BSS_CHANGED_QOS |
1844                           BSS_CHANGED_IDLE |
1845                           BSS_CHANGED_TXPOWER;
1846
1847                 switch (sdata->vif.type) {
1848                 case NL80211_IFTYPE_STATION:
1849                         changed |= BSS_CHANGED_ASSOC |
1850                                    BSS_CHANGED_ARP_FILTER |
1851                                    BSS_CHANGED_PS;
1852
1853                         /* Re-send beacon info report to the driver */
1854                         if (sdata->u.mgd.have_beacon)
1855                                 changed |= BSS_CHANGED_BEACON_INFO;
1856
1857                         sdata_lock(sdata);
1858                         ieee80211_bss_info_change_notify(sdata, changed);
1859                         sdata_unlock(sdata);
1860                         break;
1861                 case NL80211_IFTYPE_OCB:
1862                         changed |= BSS_CHANGED_OCB;
1863                         ieee80211_bss_info_change_notify(sdata, changed);
1864                         break;
1865                 case NL80211_IFTYPE_ADHOC:
1866                         changed |= BSS_CHANGED_IBSS;
1867                         /* fall through */
1868                 case NL80211_IFTYPE_AP:
1869                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1870
1871                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1872                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1873
1874                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1875                                         drv_start_ap(local, sdata);
1876                         }
1877
1878                         /* fall through */
1879                 case NL80211_IFTYPE_MESH_POINT:
1880                         if (sdata->vif.bss_conf.enable_beacon) {
1881                                 changed |= BSS_CHANGED_BEACON |
1882                                            BSS_CHANGED_BEACON_ENABLED;
1883                                 ieee80211_bss_info_change_notify(sdata, changed);
1884                         }
1885                         break;
1886                 case NL80211_IFTYPE_WDS:
1887                 case NL80211_IFTYPE_AP_VLAN:
1888                 case NL80211_IFTYPE_MONITOR:
1889                 case NL80211_IFTYPE_P2P_DEVICE:
1890                         /* nothing to do */
1891                         break;
1892                 case NL80211_IFTYPE_UNSPECIFIED:
1893                 case NUM_NL80211_IFTYPES:
1894                 case NL80211_IFTYPE_P2P_CLIENT:
1895                 case NL80211_IFTYPE_P2P_GO:
1896                         WARN_ON(1);
1897                         break;
1898                 }
1899         }
1900
1901         ieee80211_recalc_ps(local, -1);
1902
1903         /*
1904          * The sta might be in psm against the ap (e.g. because
1905          * this was the state before a hw restart), so we
1906          * explicitly send a null packet in order to make sure
1907          * it'll sync against the ap (and get out of psm).
1908          */
1909         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1910                 list_for_each_entry(sdata, &local->interfaces, list) {
1911                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1912                                 continue;
1913                         if (!sdata->u.mgd.associated)
1914                                 continue;
1915
1916                         ieee80211_send_nullfunc(local, sdata, 0);
1917                 }
1918         }
1919
1920         /* APs are now beaconing, add back stations */
1921         mutex_lock(&local->sta_mtx);
1922         list_for_each_entry(sta, &local->sta_list, list) {
1923                 enum ieee80211_sta_state state;
1924
1925                 if (!sta->uploaded)
1926                         continue;
1927
1928                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1929                         continue;
1930
1931                 for (state = IEEE80211_STA_NOTEXIST;
1932                      state < sta->sta_state; state++)
1933                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1934                                               state + 1));
1935         }
1936         mutex_unlock(&local->sta_mtx);
1937
1938         /* add back keys */
1939         list_for_each_entry(sdata, &local->interfaces, list)
1940                 if (ieee80211_sdata_running(sdata))
1941                         ieee80211_enable_keys(sdata);
1942
1943  wake_up:
1944         local->in_reconfig = false;
1945         barrier();
1946
1947         if (local->monitors == local->open_count && local->monitors > 0)
1948                 ieee80211_add_virtual_monitor(local);
1949
1950         /*
1951          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1952          * sessions can be established after a resume.
1953          *
1954          * Also tear down aggregation sessions since reconfiguring
1955          * them in a hardware restart scenario is not easily done
1956          * right now, and the hardware will have lost information
1957          * about the sessions, but we and the AP still think they
1958          * are active. This is really a workaround though.
1959          */
1960         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1961                 mutex_lock(&local->sta_mtx);
1962
1963                 list_for_each_entry(sta, &local->sta_list, list) {
1964                         ieee80211_sta_tear_down_BA_sessions(
1965                                         sta, AGG_STOP_LOCAL_REQUEST);
1966                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1967                 }
1968
1969                 mutex_unlock(&local->sta_mtx);
1970         }
1971
1972         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1973                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1974                                         false);
1975
1976         /*
1977          * Reconfigure sched scan if it was interrupted by FW restart or
1978          * suspend.
1979          */
1980         mutex_lock(&local->mtx);
1981         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1982                                                 lockdep_is_held(&local->mtx));
1983         if (sched_scan_sdata && local->sched_scan_req)
1984                 /*
1985                  * Sched scan stopped, but we don't want to report it. Instead,
1986                  * we're trying to reschedule.
1987                  */
1988                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1989                                                          local->sched_scan_req))
1990                         sched_scan_stopped = true;
1991         mutex_unlock(&local->mtx);
1992
1993         if (sched_scan_stopped)
1994                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1995
1996         /*
1997          * If this is for hw restart things are still running.
1998          * We may want to change that later, however.
1999          */
2000         if (!local->suspended || reconfig_due_to_wowlan)
2001                 drv_restart_complete(local);
2002
2003         if (!local->suspended)
2004                 return 0;
2005
2006 #ifdef CONFIG_PM
2007         /* first set suspended false, then resuming */
2008         local->suspended = false;
2009         mb();
2010         local->resuming = false;
2011
2012         list_for_each_entry(sdata, &local->interfaces, list) {
2013                 if (!ieee80211_sdata_running(sdata))
2014                         continue;
2015                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2016                         ieee80211_sta_restart(sdata);
2017         }
2018
2019         mod_timer(&local->sta_cleanup, jiffies + 1);
2020 #else
2021         WARN_ON(1);
2022 #endif
2023
2024         return 0;
2025 }
2026
2027 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2028 {
2029         struct ieee80211_sub_if_data *sdata;
2030         struct ieee80211_local *local;
2031         struct ieee80211_key *key;
2032
2033         if (WARN_ON(!vif))
2034                 return;
2035
2036         sdata = vif_to_sdata(vif);
2037         local = sdata->local;
2038
2039         if (WARN_ON(!local->resuming))
2040                 return;
2041
2042         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2043                 return;
2044
2045         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2046
2047         mutex_lock(&local->key_mtx);
2048         list_for_each_entry(key, &sdata->key_list, list)
2049                 key->flags |= KEY_FLAG_TAINTED;
2050         mutex_unlock(&local->key_mtx);
2051 }
2052 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2053
2054 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2055 {
2056         struct ieee80211_local *local = sdata->local;
2057         struct ieee80211_chanctx_conf *chanctx_conf;
2058         struct ieee80211_chanctx *chanctx;
2059
2060         mutex_lock(&local->chanctx_mtx);
2061
2062         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2063                                         lockdep_is_held(&local->chanctx_mtx));
2064
2065         if (WARN_ON_ONCE(!chanctx_conf))
2066                 goto unlock;
2067
2068         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2069         ieee80211_recalc_smps_chanctx(local, chanctx);
2070  unlock:
2071         mutex_unlock(&local->chanctx_mtx);
2072 }
2073
2074 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2075 {
2076         struct ieee80211_local *local = sdata->local;
2077         struct ieee80211_chanctx_conf *chanctx_conf;
2078         struct ieee80211_chanctx *chanctx;
2079
2080         mutex_lock(&local->chanctx_mtx);
2081
2082         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2083                                         lockdep_is_held(&local->chanctx_mtx));
2084
2085         if (WARN_ON_ONCE(!chanctx_conf))
2086                 goto unlock;
2087
2088         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2089         ieee80211_recalc_chanctx_min_def(local, chanctx);
2090  unlock:
2091         mutex_unlock(&local->chanctx_mtx);
2092 }
2093
2094 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2095 {
2096         int i;
2097
2098         for (i = 0; i < n_ids; i++)
2099                 if (ids[i] == id)
2100                         return true;
2101         return false;
2102 }
2103
2104 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2105                               const u8 *ids, int n_ids,
2106                               const u8 *after_ric, int n_after_ric,
2107                               size_t offset)
2108 {
2109         size_t pos = offset;
2110
2111         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2112                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2113                         pos += 2 + ies[pos + 1];
2114
2115                         while (pos < ielen &&
2116                                !ieee80211_id_in_list(after_ric, n_after_ric,
2117                                                      ies[pos]))
2118                                 pos += 2 + ies[pos + 1];
2119                 } else {
2120                         pos += 2 + ies[pos + 1];
2121                 }
2122         }
2123
2124         return pos;
2125 }
2126
2127 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2128                           const u8 *ids, int n_ids, size_t offset)
2129 {
2130         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2131 }
2132 EXPORT_SYMBOL(ieee80211_ie_split);
2133
2134 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2135 {
2136         size_t pos = offset;
2137
2138         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2139                 pos += 2 + ies[pos + 1];
2140
2141         return pos;
2142 }
2143
2144 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2145                                             int rssi_min_thold,
2146                                             int rssi_max_thold)
2147 {
2148         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2149
2150         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2151                 return;
2152
2153         /*
2154          * Scale up threshold values before storing it, as the RSSI averaging
2155          * algorithm uses a scaled up value as well. Change this scaling
2156          * factor if the RSSI averaging algorithm changes.
2157          */
2158         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2159         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2160 }
2161
2162 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2163                                     int rssi_min_thold,
2164                                     int rssi_max_thold)
2165 {
2166         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2167
2168         WARN_ON(rssi_min_thold == rssi_max_thold ||
2169                 rssi_min_thold > rssi_max_thold);
2170
2171         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2172                                        rssi_max_thold);
2173 }
2174 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2175
2176 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2177 {
2178         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2179
2180         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2181 }
2182 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2183
2184 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2185                               u16 cap)
2186 {
2187         __le16 tmp;
2188
2189         *pos++ = WLAN_EID_HT_CAPABILITY;
2190         *pos++ = sizeof(struct ieee80211_ht_cap);
2191         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2192
2193         /* capability flags */
2194         tmp = cpu_to_le16(cap);
2195         memcpy(pos, &tmp, sizeof(u16));
2196         pos += sizeof(u16);
2197
2198         /* AMPDU parameters */
2199         *pos++ = ht_cap->ampdu_factor |
2200                  (ht_cap->ampdu_density <<
2201                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2202
2203         /* MCS set */
2204         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2205         pos += sizeof(ht_cap->mcs);
2206
2207         /* extended capabilities */
2208         pos += sizeof(__le16);
2209
2210         /* BF capabilities */
2211         pos += sizeof(__le32);
2212
2213         /* antenna selection */
2214         pos += sizeof(u8);
2215
2216         return pos;
2217 }
2218
2219 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2220                                u32 cap)
2221 {
2222         __le32 tmp;
2223
2224         *pos++ = WLAN_EID_VHT_CAPABILITY;
2225         *pos++ = sizeof(struct ieee80211_vht_cap);
2226         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2227
2228         /* capability flags */
2229         tmp = cpu_to_le32(cap);
2230         memcpy(pos, &tmp, sizeof(u32));
2231         pos += sizeof(u32);
2232
2233         /* VHT MCS set */
2234         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2235         pos += sizeof(vht_cap->vht_mcs);
2236
2237         return pos;
2238 }
2239
2240 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2241                                const struct cfg80211_chan_def *chandef,
2242                                u16 prot_mode)
2243 {
2244         struct ieee80211_ht_operation *ht_oper;
2245         /* Build HT Information */
2246         *pos++ = WLAN_EID_HT_OPERATION;
2247         *pos++ = sizeof(struct ieee80211_ht_operation);
2248         ht_oper = (struct ieee80211_ht_operation *)pos;
2249         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2250                                         chandef->chan->center_freq);
2251         switch (chandef->width) {
2252         case NL80211_CHAN_WIDTH_160:
2253         case NL80211_CHAN_WIDTH_80P80:
2254         case NL80211_CHAN_WIDTH_80:
2255         case NL80211_CHAN_WIDTH_40:
2256                 if (chandef->center_freq1 > chandef->chan->center_freq)
2257                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2258                 else
2259                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2260                 break;
2261         default:
2262                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2263                 break;
2264         }
2265         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2266             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2267             chandef->width != NL80211_CHAN_WIDTH_20)
2268                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2269
2270         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2271         ht_oper->stbc_param = 0x0000;
2272
2273         /* It seems that Basic MCS set and Supported MCS set
2274            are identical for the first 10 bytes */
2275         memset(&ht_oper->basic_set, 0, 16);
2276         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2277
2278         return pos + sizeof(struct ieee80211_ht_operation);
2279 }
2280
2281 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2282                                   const struct ieee80211_ht_operation *ht_oper,
2283                                   struct cfg80211_chan_def *chandef)
2284 {
2285         enum nl80211_channel_type channel_type;
2286
2287         if (!ht_oper) {
2288                 cfg80211_chandef_create(chandef, control_chan,
2289                                         NL80211_CHAN_NO_HT);
2290                 return;
2291         }
2292
2293         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2294         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2295                 channel_type = NL80211_CHAN_HT20;
2296                 break;
2297         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2298                 channel_type = NL80211_CHAN_HT40PLUS;
2299                 break;
2300         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2301                 channel_type = NL80211_CHAN_HT40MINUS;
2302                 break;
2303         default:
2304                 channel_type = NL80211_CHAN_NO_HT;
2305         }
2306
2307         cfg80211_chandef_create(chandef, control_chan, channel_type);
2308 }
2309
2310 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2311                              const struct ieee80211_supported_band *sband,
2312                              const u8 *srates, int srates_len, u32 *rates)
2313 {
2314         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2315         int shift = ieee80211_chandef_get_shift(chandef);
2316         struct ieee80211_rate *br;
2317         int brate, rate, i, j, count = 0;
2318
2319         *rates = 0;
2320
2321         for (i = 0; i < srates_len; i++) {
2322                 rate = srates[i] & 0x7f;
2323
2324                 for (j = 0; j < sband->n_bitrates; j++) {
2325                         br = &sband->bitrates[j];
2326                         if ((rate_flags & br->flags) != rate_flags)
2327                                 continue;
2328
2329                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2330                         if (brate == rate) {
2331                                 *rates |= BIT(j);
2332                                 count++;
2333                                 break;
2334                         }
2335                 }
2336         }
2337         return count;
2338 }
2339
2340 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2341                             struct sk_buff *skb, bool need_basic,
2342                             enum ieee80211_band band)
2343 {
2344         struct ieee80211_local *local = sdata->local;
2345         struct ieee80211_supported_band *sband;
2346         int rate, shift;
2347         u8 i, rates, *pos;
2348         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2349         u32 rate_flags;
2350
2351         shift = ieee80211_vif_get_shift(&sdata->vif);
2352         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2353         sband = local->hw.wiphy->bands[band];
2354         rates = 0;
2355         for (i = 0; i < sband->n_bitrates; i++) {
2356                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2357                         continue;
2358                 rates++;
2359         }
2360         if (rates > 8)
2361                 rates = 8;
2362
2363         if (skb_tailroom(skb) < rates + 2)
2364                 return -ENOMEM;
2365
2366         pos = skb_put(skb, rates + 2);
2367         *pos++ = WLAN_EID_SUPP_RATES;
2368         *pos++ = rates;
2369         for (i = 0; i < rates; i++) {
2370                 u8 basic = 0;
2371                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2372                         continue;
2373
2374                 if (need_basic && basic_rates & BIT(i))
2375                         basic = 0x80;
2376                 rate = sband->bitrates[i].bitrate;
2377                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2378                                     5 * (1 << shift));
2379                 *pos++ = basic | (u8) rate;
2380         }
2381
2382         return 0;
2383 }
2384
2385 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2386                                 struct sk_buff *skb, bool need_basic,
2387                                 enum ieee80211_band band)
2388 {
2389         struct ieee80211_local *local = sdata->local;
2390         struct ieee80211_supported_band *sband;
2391         int rate, shift;
2392         u8 i, exrates, *pos;
2393         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2394         u32 rate_flags;
2395
2396         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2397         shift = ieee80211_vif_get_shift(&sdata->vif);
2398
2399         sband = local->hw.wiphy->bands[band];
2400         exrates = 0;
2401         for (i = 0; i < sband->n_bitrates; i++) {
2402                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2403                         continue;
2404                 exrates++;
2405         }
2406
2407         if (exrates > 8)
2408                 exrates -= 8;
2409         else
2410                 exrates = 0;
2411
2412         if (skb_tailroom(skb) < exrates + 2)
2413                 return -ENOMEM;
2414
2415         if (exrates) {
2416                 pos = skb_put(skb, exrates + 2);
2417                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2418                 *pos++ = exrates;
2419                 for (i = 8; i < sband->n_bitrates; i++) {
2420                         u8 basic = 0;
2421                         if ((rate_flags & sband->bitrates[i].flags)
2422                             != rate_flags)
2423                                 continue;
2424                         if (need_basic && basic_rates & BIT(i))
2425                                 basic = 0x80;
2426                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2427                                             5 * (1 << shift));
2428                         *pos++ = basic | (u8) rate;
2429                 }
2430         }
2431         return 0;
2432 }
2433
2434 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2435 {
2436         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2437         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2438
2439         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2440                 /* non-managed type inferfaces */
2441                 return 0;
2442         }
2443         return ifmgd->ave_beacon_signal / 16;
2444 }
2445 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2446
2447 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2448 {
2449         if (!mcs)
2450                 return 1;
2451
2452         /* TODO: consider rx_highest */
2453
2454         if (mcs->rx_mask[3])
2455                 return 4;
2456         if (mcs->rx_mask[2])
2457                 return 3;
2458         if (mcs->rx_mask[1])
2459                 return 2;
2460         return 1;
2461 }
2462
2463 /**
2464  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2465  * @local: mac80211 hw info struct
2466  * @status: RX status
2467  * @mpdu_len: total MPDU length (including FCS)
2468  * @mpdu_offset: offset into MPDU to calculate timestamp at
2469  *
2470  * This function calculates the RX timestamp at the given MPDU offset, taking
2471  * into account what the RX timestamp was. An offset of 0 will just normalize
2472  * the timestamp to TSF at beginning of MPDU reception.
2473  */
2474 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2475                                      struct ieee80211_rx_status *status,
2476                                      unsigned int mpdu_len,
2477                                      unsigned int mpdu_offset)
2478 {
2479         u64 ts = status->mactime;
2480         struct rate_info ri;
2481         u16 rate;
2482
2483         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2484                 return 0;
2485
2486         memset(&ri, 0, sizeof(ri));
2487
2488         /* Fill cfg80211 rate info */
2489         if (status->flag & RX_FLAG_HT) {
2490                 ri.mcs = status->rate_idx;
2491                 ri.flags |= RATE_INFO_FLAGS_MCS;
2492                 if (status->flag & RX_FLAG_40MHZ)
2493                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2494                 if (status->flag & RX_FLAG_SHORT_GI)
2495                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2496         } else if (status->flag & RX_FLAG_VHT) {
2497                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2498                 ri.mcs = status->rate_idx;
2499                 ri.nss = status->vht_nss;
2500                 if (status->flag & RX_FLAG_40MHZ)
2501                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2502                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2503                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2504                 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2505                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2506                 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2507                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2508                 if (status->flag & RX_FLAG_SHORT_GI)
2509                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2510         } else {
2511                 struct ieee80211_supported_band *sband;
2512                 int shift = 0;
2513                 int bitrate;
2514
2515                 if (status->flag & RX_FLAG_10MHZ)
2516                         shift = 1;
2517                 if (status->flag & RX_FLAG_5MHZ)
2518                         shift = 2;
2519
2520                 sband = local->hw.wiphy->bands[status->band];
2521                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2522                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2523         }
2524
2525         rate = cfg80211_calculate_bitrate(&ri);
2526         if (WARN_ONCE(!rate,
2527                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2528                       status->flag, status->rate_idx, status->vht_nss))
2529                 return 0;
2530
2531         /* rewind from end of MPDU */
2532         if (status->flag & RX_FLAG_MACTIME_END)
2533                 ts -= mpdu_len * 8 * 10 / rate;
2534
2535         ts += mpdu_offset * 8 * 10 / rate;
2536
2537         return ts;
2538 }
2539
2540 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2541 {
2542         struct ieee80211_sub_if_data *sdata;
2543         struct cfg80211_chan_def chandef;
2544
2545         mutex_lock(&local->mtx);
2546         mutex_lock(&local->iflist_mtx);
2547         list_for_each_entry(sdata, &local->interfaces, list) {
2548                 /* it might be waiting for the local->mtx, but then
2549                  * by the time it gets it, sdata->wdev.cac_started
2550                  * will no longer be true
2551                  */
2552                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2553
2554                 if (sdata->wdev.cac_started) {
2555                         chandef = sdata->vif.bss_conf.chandef;
2556                         ieee80211_vif_release_channel(sdata);
2557                         cfg80211_cac_event(sdata->dev,
2558                                            &chandef,
2559                                            NL80211_RADAR_CAC_ABORTED,
2560                                            GFP_KERNEL);
2561                 }
2562         }
2563         mutex_unlock(&local->iflist_mtx);
2564         mutex_unlock(&local->mtx);
2565 }
2566
2567 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2568 {
2569         struct ieee80211_local *local =
2570                 container_of(work, struct ieee80211_local, radar_detected_work);
2571         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2572         struct ieee80211_chanctx *ctx;
2573         int num_chanctx = 0;
2574
2575         mutex_lock(&local->chanctx_mtx);
2576         list_for_each_entry(ctx, &local->chanctx_list, list) {
2577                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2578                         continue;
2579
2580                 num_chanctx++;
2581                 chandef = ctx->conf.def;
2582         }
2583         mutex_unlock(&local->chanctx_mtx);
2584
2585         ieee80211_dfs_cac_cancel(local);
2586
2587         if (num_chanctx > 1)
2588                 /* XXX: multi-channel is not supported yet */
2589                 WARN_ON(1);
2590         else
2591                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2592 }
2593
2594 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2595 {
2596         struct ieee80211_local *local = hw_to_local(hw);
2597
2598         trace_api_radar_detected(local);
2599
2600         ieee80211_queue_work(hw, &local->radar_detected_work);
2601 }
2602 EXPORT_SYMBOL(ieee80211_radar_detected);
2603
2604 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2605 {
2606         u32 ret;
2607         int tmp;
2608
2609         switch (c->width) {
2610         case NL80211_CHAN_WIDTH_20:
2611                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2612                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2613                 break;
2614         case NL80211_CHAN_WIDTH_40:
2615                 c->width = NL80211_CHAN_WIDTH_20;
2616                 c->center_freq1 = c->chan->center_freq;
2617                 ret = IEEE80211_STA_DISABLE_40MHZ |
2618                       IEEE80211_STA_DISABLE_VHT;
2619                 break;
2620         case NL80211_CHAN_WIDTH_80:
2621                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2622                 /* n_P40 */
2623                 tmp /= 2;
2624                 /* freq_P40 */
2625                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2626                 c->width = NL80211_CHAN_WIDTH_40;
2627                 ret = IEEE80211_STA_DISABLE_VHT;
2628                 break;
2629         case NL80211_CHAN_WIDTH_80P80:
2630                 c->center_freq2 = 0;
2631                 c->width = NL80211_CHAN_WIDTH_80;
2632                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2633                       IEEE80211_STA_DISABLE_160MHZ;
2634                 break;
2635         case NL80211_CHAN_WIDTH_160:
2636                 /* n_P20 */
2637                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2638                 /* n_P80 */
2639                 tmp /= 4;
2640                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2641                 c->width = NL80211_CHAN_WIDTH_80;
2642                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2643                       IEEE80211_STA_DISABLE_160MHZ;
2644                 break;
2645         default:
2646         case NL80211_CHAN_WIDTH_20_NOHT:
2647                 WARN_ON_ONCE(1);
2648                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2649                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2650                 break;
2651         case NL80211_CHAN_WIDTH_5:
2652         case NL80211_CHAN_WIDTH_10:
2653                 WARN_ON_ONCE(1);
2654                 /* keep c->width */
2655                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2656                 break;
2657         }
2658
2659         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2660
2661         return ret;
2662 }
2663
2664 /*
2665  * Returns true if smps_mode_new is strictly more restrictive than
2666  * smps_mode_old.
2667  */
2668 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2669                                    enum ieee80211_smps_mode smps_mode_new)
2670 {
2671         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2672                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2673                 return false;
2674
2675         switch (smps_mode_old) {
2676         case IEEE80211_SMPS_STATIC:
2677                 return false;
2678         case IEEE80211_SMPS_DYNAMIC:
2679                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2680         case IEEE80211_SMPS_OFF:
2681                 return smps_mode_new != IEEE80211_SMPS_OFF;
2682         default:
2683                 WARN_ON(1);
2684         }
2685
2686         return false;
2687 }
2688
2689 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2690                               struct cfg80211_csa_settings *csa_settings)
2691 {
2692         struct sk_buff *skb;
2693         struct ieee80211_mgmt *mgmt;
2694         struct ieee80211_local *local = sdata->local;
2695         int freq;
2696         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2697                                sizeof(mgmt->u.action.u.chan_switch);
2698         u8 *pos;
2699
2700         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2701             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2702                 return -EOPNOTSUPP;
2703
2704         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2705                             5 + /* channel switch announcement element */
2706                             3 + /* secondary channel offset element */
2707                             8); /* mesh channel switch parameters element */
2708         if (!skb)
2709                 return -ENOMEM;
2710
2711         skb_reserve(skb, local->tx_headroom);
2712         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2713         memset(mgmt, 0, hdr_len);
2714         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2715                                           IEEE80211_STYPE_ACTION);
2716
2717         eth_broadcast_addr(mgmt->da);
2718         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2719         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2720                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2721         } else {
2722                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2723                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2724         }
2725         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2726         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2727         pos = skb_put(skb, 5);
2728         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2729         *pos++ = 3;                                             /* IE length */
2730         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2731         freq = csa_settings->chandef.chan->center_freq;
2732         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2733         *pos++ = csa_settings->count;                           /* count */
2734
2735         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2736                 enum nl80211_channel_type ch_type;
2737
2738                 skb_put(skb, 3);
2739                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2740                 *pos++ = 1;                                     /* IE length */
2741                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2742                 if (ch_type == NL80211_CHAN_HT40PLUS)
2743                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2744                 else
2745                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2746         }
2747
2748         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2749                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2750
2751                 skb_put(skb, 8);
2752                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2753                 *pos++ = 6;                                     /* IE length */
2754                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2755                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2756                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2757                 *pos++ |= csa_settings->block_tx ?
2758                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2759                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2760                 pos += 2;
2761                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2762                 pos += 2;
2763         }
2764
2765         ieee80211_tx_skb(sdata, skb);
2766         return 0;
2767 }
2768
2769 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2770 {
2771         return !(cs == NULL || cs->cipher == 0 ||
2772                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2773                  cs->hdr_len <= cs->key_idx_off ||
2774                  cs->key_idx_shift > 7 ||
2775                  cs->key_idx_mask == 0);
2776 }
2777
2778 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2779 {
2780         int i;
2781
2782         /* Ensure we have enough iftype bitmap space for all iftype values */
2783         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2784
2785         for (i = 0; i < n; i++)
2786                 if (!ieee80211_cs_valid(&cs[i]))
2787                         return false;
2788
2789         return true;
2790 }
2791
2792 const struct ieee80211_cipher_scheme *
2793 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2794                  enum nl80211_iftype iftype)
2795 {
2796         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2797         int n = local->hw.n_cipher_schemes;
2798         int i;
2799         const struct ieee80211_cipher_scheme *cs = NULL;
2800
2801         for (i = 0; i < n; i++) {
2802                 if (l[i].cipher == cipher) {
2803                         cs = &l[i];
2804                         break;
2805                 }
2806         }
2807
2808         if (!cs || !(cs->iftype & BIT(iftype)))
2809                 return NULL;
2810
2811         return cs;
2812 }
2813
2814 int ieee80211_cs_headroom(struct ieee80211_local *local,
2815                           struct cfg80211_crypto_settings *crypto,
2816                           enum nl80211_iftype iftype)
2817 {
2818         const struct ieee80211_cipher_scheme *cs;
2819         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2820         int i;
2821
2822         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2823                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2824                                       iftype);
2825
2826                 if (cs && headroom < cs->hdr_len)
2827                         headroom = cs->hdr_len;
2828         }
2829
2830         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2831         if (cs && headroom < cs->hdr_len)
2832                 headroom = cs->hdr_len;
2833
2834         return headroom;
2835 }
2836
2837 static bool
2838 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2839 {
2840         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2841         int skip;
2842
2843         if (end > 0)
2844                 return false;
2845
2846         /* End time is in the past, check for repetitions */
2847         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2848         if (data->count[i] < 255) {
2849                 if (data->count[i] <= skip) {
2850                         data->count[i] = 0;
2851                         return false;
2852                 }
2853
2854                 data->count[i] -= skip;
2855         }
2856
2857         data->desc[i].start += skip * data->desc[i].interval;
2858
2859         return true;
2860 }
2861
2862 static bool
2863 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2864                              s32 *offset)
2865 {
2866         bool ret = false;
2867         int i;
2868
2869         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2870                 s32 cur;
2871
2872                 if (!data->count[i])
2873                         continue;
2874
2875                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2876                         ret = true;
2877
2878                 cur = data->desc[i].start - tsf;
2879                 if (cur > *offset)
2880                         continue;
2881
2882                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2883                 if (cur > *offset)
2884                         *offset = cur;
2885         }
2886
2887         return ret;
2888 }
2889
2890 static u32
2891 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2892 {
2893         s32 offset = 0;
2894         int tries = 0;
2895         /*
2896          * arbitrary limit, used to avoid infinite loops when combined NoA
2897          * descriptors cover the full time period.
2898          */
2899         int max_tries = 5;
2900
2901         ieee80211_extend_absent_time(data, tsf, &offset);
2902         do {
2903                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2904                         break;
2905
2906                 tries++;
2907         } while (tries < max_tries);
2908
2909         return offset;
2910 }
2911
2912 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2913 {
2914         u32 next_offset = BIT(31) - 1;
2915         int i;
2916
2917         data->absent = 0;
2918         data->has_next_tsf = false;
2919         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2920                 s32 start;
2921
2922                 if (!data->count[i])
2923                         continue;
2924
2925                 ieee80211_extend_noa_desc(data, tsf, i);
2926                 start = data->desc[i].start - tsf;
2927                 if (start <= 0)
2928                         data->absent |= BIT(i);
2929
2930                 if (next_offset > start)
2931                         next_offset = start;
2932
2933                 data->has_next_tsf = true;
2934         }
2935
2936         if (data->absent)
2937                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2938
2939         data->next_tsf = tsf + next_offset;
2940 }
2941 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2942
2943 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2944                             struct ieee80211_noa_data *data, u32 tsf)
2945 {
2946         int ret = 0;
2947         int i;
2948
2949         memset(data, 0, sizeof(*data));
2950
2951         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2952                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2953
2954                 if (!desc->count || !desc->duration)
2955                         continue;
2956
2957                 data->count[i] = desc->count;
2958                 data->desc[i].start = le32_to_cpu(desc->start_time);
2959                 data->desc[i].duration = le32_to_cpu(desc->duration);
2960                 data->desc[i].interval = le32_to_cpu(desc->interval);
2961
2962                 if (data->count[i] > 1 &&
2963                     data->desc[i].interval < data->desc[i].duration)
2964                         continue;
2965
2966                 ieee80211_extend_noa_desc(data, tsf, i);
2967                 ret++;
2968         }
2969
2970         if (ret)
2971                 ieee80211_update_p2p_noa(data, tsf);
2972
2973         return ret;
2974 }
2975 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2976
2977 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2978                            struct ieee80211_sub_if_data *sdata)
2979 {
2980         u64 tsf = drv_get_tsf(local, sdata);
2981         u64 dtim_count = 0;
2982         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2983         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2984         struct ps_data *ps;
2985         u8 bcns_from_dtim;
2986
2987         if (tsf == -1ULL || !beacon_int || !dtim_period)
2988                 return;
2989
2990         if (sdata->vif.type == NL80211_IFTYPE_AP ||
2991             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2992                 if (!sdata->bss)
2993                         return;
2994
2995                 ps = &sdata->bss->ps;
2996         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2997                 ps = &sdata->u.mesh.ps;
2998         } else {
2999                 return;
3000         }
3001
3002         /*
3003          * actually finds last dtim_count, mac80211 will update in
3004          * __beacon_add_tim().
3005          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3006          */
3007         do_div(tsf, beacon_int);
3008         bcns_from_dtim = do_div(tsf, dtim_period);
3009         /* just had a DTIM */
3010         if (!bcns_from_dtim)
3011                 dtim_count = 0;
3012         else
3013                 dtim_count = dtim_period - bcns_from_dtim;
3014
3015         ps->dtim_count = dtim_count;
3016 }
3017
3018 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3019                                          struct ieee80211_chanctx *ctx)
3020 {
3021         struct ieee80211_sub_if_data *sdata;
3022         u8 radar_detect = 0;
3023
3024         lockdep_assert_held(&local->chanctx_mtx);
3025
3026         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3027                 return 0;
3028
3029         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3030                 if (sdata->reserved_radar_required)
3031                         radar_detect |= BIT(sdata->reserved_chandef.width);
3032
3033         /*
3034          * An in-place reservation context should not have any assigned vifs
3035          * until it replaces the other context.
3036          */
3037         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3038                 !list_empty(&ctx->assigned_vifs));
3039
3040         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3041                 if (sdata->radar_required)
3042                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3043
3044         return radar_detect;
3045 }
3046
3047 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3048                                  const struct cfg80211_chan_def *chandef,
3049                                  enum ieee80211_chanctx_mode chanmode,
3050                                  u8 radar_detect)
3051 {
3052         struct ieee80211_local *local = sdata->local;
3053         struct ieee80211_sub_if_data *sdata_iter;
3054         enum nl80211_iftype iftype = sdata->wdev.iftype;
3055         int num[NUM_NL80211_IFTYPES];
3056         struct ieee80211_chanctx *ctx;
3057         int num_different_channels = 0;
3058         int total = 1;
3059
3060         lockdep_assert_held(&local->chanctx_mtx);
3061
3062         if (WARN_ON(hweight32(radar_detect) > 1))
3063                 return -EINVAL;
3064
3065         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3066                     !chandef->chan))
3067                 return -EINVAL;
3068
3069         if (chandef)
3070                 num_different_channels = 1;
3071
3072         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3073                 return -EINVAL;
3074
3075         /* Always allow software iftypes */
3076         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3077                 if (radar_detect)
3078                         return -EINVAL;
3079                 return 0;
3080         }
3081
3082         memset(num, 0, sizeof(num));
3083
3084         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3085                 num[iftype] = 1;
3086
3087         list_for_each_entry(ctx, &local->chanctx_list, list) {
3088                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3089                         continue;
3090                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3091                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3092                         num_different_channels++;
3093                         continue;
3094                 }
3095                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3096                     cfg80211_chandef_compatible(chandef,
3097                                                 &ctx->conf.def))
3098                         continue;
3099                 num_different_channels++;
3100         }
3101
3102         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3103                 struct wireless_dev *wdev_iter;
3104
3105                 wdev_iter = &sdata_iter->wdev;
3106
3107                 if (sdata_iter == sdata ||
3108                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3109                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3110                         continue;
3111
3112                 num[wdev_iter->iftype]++;
3113                 total++;
3114         }
3115
3116         if (total == 1 && !radar_detect)
3117                 return 0;
3118
3119         return cfg80211_check_combinations(local->hw.wiphy,
3120                                            num_different_channels,
3121                                            radar_detect, num);
3122 }
3123
3124 static void
3125 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3126                          void *data)
3127 {
3128         u32 *max_num_different_channels = data;
3129
3130         *max_num_different_channels = max(*max_num_different_channels,
3131                                           c->num_different_channels);
3132 }
3133
3134 int ieee80211_max_num_channels(struct ieee80211_local *local)
3135 {
3136         struct ieee80211_sub_if_data *sdata;
3137         int num[NUM_NL80211_IFTYPES] = {};
3138         struct ieee80211_chanctx *ctx;
3139         int num_different_channels = 0;
3140         u8 radar_detect = 0;
3141         u32 max_num_different_channels = 1;
3142         int err;
3143
3144         lockdep_assert_held(&local->chanctx_mtx);
3145
3146         list_for_each_entry(ctx, &local->chanctx_list, list) {
3147                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3148                         continue;
3149
3150                 num_different_channels++;
3151
3152                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3153         }
3154
3155         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3156                 num[sdata->wdev.iftype]++;
3157
3158         err = cfg80211_iter_combinations(local->hw.wiphy,
3159                                          num_different_channels, radar_detect,
3160                                          num, ieee80211_iter_max_chans,
3161                                          &max_num_different_channels);
3162         if (err < 0)
3163                 return err;
3164
3165         return max_num_different_channels;
3166 }
3167
3168 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3169 {
3170         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3171         *buf++ = 7; /* len */
3172         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3173         *buf++ = 0x50;
3174         *buf++ = 0xf2;
3175         *buf++ = 2; /* WME */
3176         *buf++ = 0; /* WME info */
3177         *buf++ = 1; /* WME ver */
3178         *buf++ = qosinfo; /* U-APSD no in use */
3179
3180         return buf;
3181 }