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                               unsigned int queues, bool drop)
 582 {
 583         if (!local->ops->flush)
 584                 return;
 585
 586         /*
 587          * If no queue was set, or if the HW doesn't support
 588          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 589          */
 590         if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
 591                 queues = ieee80211_get_vif_queues(local, sdata);
 592
 593         ieee80211_stop_queues_by_reason(&local->hw, queues,
 594                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 595                                         false);
 596
 597         drv_flush(local, sdata, queues, drop);
 598
 599         ieee80211_wake_queues_by_reason(&local->hw, queues,
 600                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 601                                         false);
 602 }
 603
 604 void ieee80211_flush_queues(struct ieee80211_local *local,
 605                             struct ieee80211_sub_if_data *sdata, bool drop)
 606 {
 607         __ieee80211_flush_queues(local, sdata, 0, drop);
 608 }
 609
 610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 611                                struct ieee80211_sub_if_data *sdata,
 612                                enum queue_stop_reason reason)
 613 {
 614         ieee80211_stop_queues_by_reason(&local->hw,
 615                                         ieee80211_get_vif_queues(local, sdata),
 616                                         reason, true);
 617 }
 618
 619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 620                                struct ieee80211_sub_if_data *sdata,
 621                                enum queue_stop_reason reason)
 622 {
 623         ieee80211_wake_queues_by_reason(&local->hw,
 624                                         ieee80211_get_vif_queues(local, sdata),
 625                                         reason, true);
 626 }
 627
 628 static void __iterate_interfaces(struct ieee80211_local *local,
 629                                  u32 iter_flags,
 630                                  void (*iterator)(void *data, u8 *mac,
 631                                                   struct ieee80211_vif *vif),
 632                                  void *data)
 633 {
 634         struct ieee80211_sub_if_data *sdata;
 635         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 636
 637         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 638                 switch (sdata->vif.type) {
 639                 case NL80211_IFTYPE_MONITOR:
 640                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 641                                 continue;
 642                         break;
 643                 case NL80211_IFTYPE_AP_VLAN:
 644                         continue;
 645                 default:
 646                         break;
 647                 }
 648                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 649                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 650                         continue;
 651                 if (ieee80211_sdata_running(sdata) || !active_only)
 652                         iterator(data, sdata->vif.addr,
 653                                  &sdata->vif);
 654         }
 655
 656         sdata = rcu_dereference_check(local->monitor_sdata,
 657                                       lockdep_is_held(&local->iflist_mtx) ||
 658                                       lockdep_rtnl_is_held());
 659         if (sdata &&
 660             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 661              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 662                 iterator(data, sdata->vif.addr, &sdata->vif);
 663 }
 664
 665 void ieee80211_iterate_interfaces(
 666         struct ieee80211_hw *hw, u32 iter_flags,
 667         void (*iterator)(void *data, u8 *mac,
 668                          struct ieee80211_vif *vif),
 669         void *data)
 670 {
 671         struct ieee80211_local *local = hw_to_local(hw);
 672
 673         mutex_lock(&local->iflist_mtx);
 674         __iterate_interfaces(local, iter_flags, iterator, data);
 675         mutex_unlock(&local->iflist_mtx);
 676 }
 677 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 678
 679 void ieee80211_iterate_active_interfaces_atomic(
 680         struct ieee80211_hw *hw, u32 iter_flags,
 681         void (*iterator)(void *data, u8 *mac,
 682                          struct ieee80211_vif *vif),
 683         void *data)
 684 {
 685         struct ieee80211_local *local = hw_to_local(hw);
 686
 687         rcu_read_lock();
 688         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 689                              iterator, data);
 690         rcu_read_unlock();
 691 }
 692 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 693
 694 void ieee80211_iterate_active_interfaces_rtnl(
 695         struct ieee80211_hw *hw, u32 iter_flags,
 696         void (*iterator)(void *data, u8 *mac,
 697                          struct ieee80211_vif *vif),
 698         void *data)
 699 {
 700         struct ieee80211_local *local = hw_to_local(hw);
 701
 702         ASSERT_RTNL();
 703
 704         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 705                              iterator, data);
 706 }
 707 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 708
 709 static void __iterate_stations(struct ieee80211_local *local,
 710                                void (*iterator)(void *data,
 711                                                 struct ieee80211_sta *sta),
 712                                void *data)
 713 {
 714         struct sta_info *sta;
 715
 716         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 717                 if (!sta->uploaded)
 718                         continue;
 719
 720                 iterator(data, &sta->sta);
 721         }
 722 }
 723
 724 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 725                         void (*iterator)(void *data,
 726                                          struct ieee80211_sta *sta),
 727                         void *data)
 728 {
 729         struct ieee80211_local *local = hw_to_local(hw);
 730
 731         rcu_read_lock();
 732         __iterate_stations(local, iterator, data);
 733         rcu_read_unlock();
 734 }
 735 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 736
 737 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 738 {
 739         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 740
 741         if (!ieee80211_sdata_running(sdata) ||
 742             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 743                 return NULL;
 744         return &sdata->vif;
 745 }
 746 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 747
 748 /*
 749  * Nothing should have been stuffed into the workqueue during
 750  * the suspend->resume cycle. Since we can't check each caller
 751  * of this function if we are already quiescing / suspended,
 752  * check here and don't WARN since this can actually happen when
 753  * the rx path (for example) is racing against __ieee80211_suspend
 754  * and suspending / quiescing was set after the rx path checked
 755  * them.
 756  */
 757 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 758 {
 759         if (local->quiescing || (local->suspended && !local->resuming)) {
 760                 pr_warn("queueing ieee80211 work while going to suspend\n");
 761                 return false;
 762         }
 763
 764         return true;
 765 }
 766
 767 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 768 {
 769         struct ieee80211_local *local = hw_to_local(hw);
 770
 771         if (!ieee80211_can_queue_work(local))
 772                 return;
 773
 774         queue_work(local->workqueue, work);
 775 }
 776 EXPORT_SYMBOL(ieee80211_queue_work);
 777
 778 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 779                                   struct delayed_work *dwork,
 780                                   unsigned long delay)
 781 {
 782         struct ieee80211_local *local = hw_to_local(hw);
 783
 784         if (!ieee80211_can_queue_work(local))
 785                 return;
 786
 787         queue_delayed_work(local->workqueue, dwork, delay);
 788 }
 789 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 790
 791 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 792                                struct ieee802_11_elems *elems,
 793                                u64 filter, u32 crc)
 794 {
 795         size_t left = len;
 796         const u8 *pos = start;
 797         bool calc_crc = filter != 0;
 798         DECLARE_BITMAP(seen_elems, 256);
 799         const u8 *ie;
 800
 801         bitmap_zero(seen_elems, 256);
 802         memset(elems, 0, sizeof(*elems));
 803         elems->ie_start = start;
 804         elems->total_len = len;
 805
 806         while (left >= 2) {
 807                 u8 id, elen;
 808                 bool elem_parse_failed;
 809
 810                 id = *pos++;
 811                 elen = *pos++;
 812                 left -= 2;
 813
 814                 if (elen > left) {
 815                         elems->parse_error = true;
 816                         break;
 817                 }
 818
 819                 switch (id) {
 820                 case WLAN_EID_SSID:
 821                 case WLAN_EID_SUPP_RATES:
 822                 case WLAN_EID_FH_PARAMS:
 823                 case WLAN_EID_DS_PARAMS:
 824                 case WLAN_EID_CF_PARAMS:
 825                 case WLAN_EID_TIM:
 826                 case WLAN_EID_IBSS_PARAMS:
 827                 case WLAN_EID_CHALLENGE:
 828                 case WLAN_EID_RSN:
 829                 case WLAN_EID_ERP_INFO:
 830                 case WLAN_EID_EXT_SUPP_RATES:
 831                 case WLAN_EID_HT_CAPABILITY:
 832                 case WLAN_EID_HT_OPERATION:
 833                 case WLAN_EID_VHT_CAPABILITY:
 834                 case WLAN_EID_VHT_OPERATION:
 835                 case WLAN_EID_MESH_ID:
 836                 case WLAN_EID_MESH_CONFIG:
 837                 case WLAN_EID_PEER_MGMT:
 838                 case WLAN_EID_PREQ:
 839                 case WLAN_EID_PREP:
 840                 case WLAN_EID_PERR:
 841                 case WLAN_EID_RANN:
 842                 case WLAN_EID_CHANNEL_SWITCH:
 843                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 844                 case WLAN_EID_COUNTRY:
 845                 case WLAN_EID_PWR_CONSTRAINT:
 846                 case WLAN_EID_TIMEOUT_INTERVAL:
 847                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 848                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 849                 case WLAN_EID_CHAN_SWITCH_PARAM:
 850                 case WLAN_EID_EXT_CAPABILITY:
 851                 case WLAN_EID_CHAN_SWITCH_TIMING:
 852                 case WLAN_EID_LINK_ID:
 853                 /*
 854                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 855                  * that if the content gets bigger it might be needed more than once
 856                  */
 857                         if (test_bit(id, seen_elems)) {
 858                                 elems->parse_error = true;
 859                                 left -= elen;
 860                                 pos += elen;
 861                                 continue;
 862                         }
 863                         break;
 864                 }
 865
 866                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 867                         crc = crc32_be(crc, pos - 2, elen + 2);
 868
 869                 elem_parse_failed = false;
 870
 871                 switch (id) {
 872                 case WLAN_EID_LINK_ID:
 873                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 874                                 elem_parse_failed = true;
 875                                 break;
 876                         }
 877                         elems->lnk_id = (void *)(pos - 2);
 878                         break;
 879                 case WLAN_EID_CHAN_SWITCH_TIMING:
 880                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 881                                 elem_parse_failed = true;
 882                                 break;
 883                         }
 884                         elems->ch_sw_timing = (void *)pos;
 885                         break;
 886                 case WLAN_EID_EXT_CAPABILITY:
 887                         elems->ext_capab = pos;
 888                         elems->ext_capab_len = elen;
 889                         break;
 890                 case WLAN_EID_SSID:
 891                         elems->ssid = pos;
 892                         elems->ssid_len = elen;
 893                         break;
 894                 case WLAN_EID_SUPP_RATES:
 895                         elems->supp_rates = pos;
 896                         elems->supp_rates_len = elen;
 897                         break;
 898                 case WLAN_EID_DS_PARAMS:
 899                         if (elen >= 1)
 900                                 elems->ds_params = pos;
 901                         else
 902                                 elem_parse_failed = true;
 903                         break;
 904                 case WLAN_EID_TIM:
 905                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 906                                 elems->tim = (void *)pos;
 907                                 elems->tim_len = elen;
 908                         } else
 909                                 elem_parse_failed = true;
 910                         break;
 911                 case WLAN_EID_CHALLENGE:
 912                         elems->challenge = pos;
 913                         elems->challenge_len = elen;
 914                         break;
 915                 case WLAN_EID_VENDOR_SPECIFIC:
 916                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 917                             pos[2] == 0xf2) {
 918                                 /* Microsoft OUI (00:50:F2) */
 919
 920                                 if (calc_crc)
 921                                         crc = crc32_be(crc, pos - 2, elen + 2);
 922
 923                                 if (elen >= 5 && pos[3] == 2) {
 924                                         /* OUI Type 2 - WMM IE */
 925                                         if (pos[4] == 0) {
 926                                                 elems->wmm_info = pos;
 927                                                 elems->wmm_info_len = elen;
 928                                         } else if (pos[4] == 1) {
 929                                                 elems->wmm_param = pos;
 930                                                 elems->wmm_param_len = elen;
 931                                         }
 932                                 }
 933                         }
 934                         break;
 935                 case WLAN_EID_RSN:
 936                         elems->rsn = pos;
 937                         elems->rsn_len = elen;
 938                         break;
 939                 case WLAN_EID_ERP_INFO:
 940                         if (elen >= 1)
 941                                 elems->erp_info = pos;
 942                         else
 943                                 elem_parse_failed = true;
 944                         break;
 945                 case WLAN_EID_EXT_SUPP_RATES:
 946                         elems->ext_supp_rates = pos;
 947                         elems->ext_supp_rates_len = elen;
 948                         break;
 949                 case WLAN_EID_HT_CAPABILITY:
 950                         if (elen >= sizeof(struct ieee80211_ht_cap))
 951                                 elems->ht_cap_elem = (void *)pos;
 952                         else
 953                                 elem_parse_failed = true;
 954                         break;
 955                 case WLAN_EID_HT_OPERATION:
 956                         if (elen >= sizeof(struct ieee80211_ht_operation))
 957                                 elems->ht_operation = (void *)pos;
 958                         else
 959                                 elem_parse_failed = true;
 960                         break;
 961                 case WLAN_EID_VHT_CAPABILITY:
 962                         if (elen >= sizeof(struct ieee80211_vht_cap))
 963                                 elems->vht_cap_elem = (void *)pos;
 964                         else
 965                                 elem_parse_failed = true;
 966                         break;
 967                 case WLAN_EID_VHT_OPERATION:
 968                         if (elen >= sizeof(struct ieee80211_vht_operation))
 969                                 elems->vht_operation = (void *)pos;
 970                         else
 971                                 elem_parse_failed = true;
 972                         break;
 973                 case WLAN_EID_OPMODE_NOTIF:
 974                         if (elen > 0)
 975                                 elems->opmode_notif = pos;
 976                         else
 977                                 elem_parse_failed = true;
 978                         break;
 979                 case WLAN_EID_MESH_ID:
 980                         elems->mesh_id = pos;
 981                         elems->mesh_id_len = elen;
 982                         break;
 983                 case WLAN_EID_MESH_CONFIG:
 984                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 985                                 elems->mesh_config = (void *)pos;
 986                         else
 987                                 elem_parse_failed = true;
 988                         break;
 989                 case WLAN_EID_PEER_MGMT:
 990                         elems->peering = pos;
 991                         elems->peering_len = elen;
 992                         break;
 993                 case WLAN_EID_MESH_AWAKE_WINDOW:
 994                         if (elen >= 2)
 995                                 elems->awake_window = (void *)pos;
 996                         break;
 997                 case WLAN_EID_PREQ:
 998                         elems->preq = pos;
 999                         elems->preq_len = elen;
1000                         break;
1001                 case WLAN_EID_PREP:
1002                         elems->prep = pos;
1003                         elems->prep_len = elen;
1004                         break;
1005                 case WLAN_EID_PERR:
1006                         elems->perr = pos;
1007                         elems->perr_len = elen;
1008                         break;
1009                 case WLAN_EID_RANN:
1010                         if (elen >= sizeof(struct ieee80211_rann_ie))
1011                                 elems->rann = (void *)pos;
1012                         else
1013                                 elem_parse_failed = true;
1014                         break;
1015                 case WLAN_EID_CHANNEL_SWITCH:
1016                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         elems->ch_switch_ie = (void *)pos;
1021                         break;
1022                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1023                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1024                                 elem_parse_failed = true;
1025                                 break;
1026                         }
1027                         elems->ext_chansw_ie = (void *)pos;
1028                         break;
1029                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1030                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1031                                 elem_parse_failed = true;
1032                                 break;
1033                         }
1034                         elems->sec_chan_offs = (void *)pos;
1035                         break;
1036                 case WLAN_EID_CHAN_SWITCH_PARAM:
1037                         if (elen !=
1038                             sizeof(*elems->mesh_chansw_params_ie)) {
1039                                 elem_parse_failed = true;
1040                                 break;
1041                         }
1042                         elems->mesh_chansw_params_ie = (void *)pos;
1043                         break;
1044                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1045                         if (!action ||
1046                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1047                                 elem_parse_failed = true;
1048                                 break;
1049                         }
1050                         elems->wide_bw_chansw_ie = (void *)pos;
1051                         break;
1052                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1053                         if (action) {
1054                                 elem_parse_failed = true;
1055                                 break;
1056                         }
1057                         /*
1058                          * This is a bit tricky, but as we only care about
1059                          * the wide bandwidth channel switch element, so
1060                          * just parse it out manually.
1061                          */
1062                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1063                                               pos, elen);
1064                         if (ie) {
1065                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1066                                         elems->wide_bw_chansw_ie =
1067                                                 (void *)(ie + 2);
1068                                 else
1069                                         elem_parse_failed = true;
1070                         }
1071                         break;
1072                 case WLAN_EID_COUNTRY:
1073                         elems->country_elem = pos;
1074                         elems->country_elem_len = elen;
1075                         break;
1076                 case WLAN_EID_PWR_CONSTRAINT:
1077                         if (elen != 1) {
1078                                 elem_parse_failed = true;
1079                                 break;
1080                         }
1081                         elems->pwr_constr_elem = pos;
1082                         break;
1083                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1084                         /* Lots of different options exist, but we only care
1085                          * about the Dynamic Transmit Power Control element.
1086                          * First check for the Cisco OUI, then for the DTPC
1087                          * tag (0x00).
1088                          */
1089                         if (elen < 4) {
1090                                 elem_parse_failed = true;
1091                                 break;
1092                         }
1093
1094                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1095                             pos[2] != 0x96 || pos[3] != 0x00)
1096                                 break;
1097
1098                         if (elen != 6) {
1099                                 elem_parse_failed = true;
1100                                 break;
1101                         }
1102
1103                         if (calc_crc)
1104                                 crc = crc32_be(crc, pos - 2, elen + 2);
1105
1106                         elems->cisco_dtpc_elem = pos;
1107                         break;
1108                 case WLAN_EID_TIMEOUT_INTERVAL:
1109                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1110                                 elems->timeout_int = (void *)pos;
1111                         else
1112                                 elem_parse_failed = true;
1113                         break;
1114                 default:
1115                         break;
1116                 }
1117
1118                 if (elem_parse_failed)
1119                         elems->parse_error = true;
1120                 else
1121                         __set_bit(id, seen_elems);
1122
1123                 left -= elen;
1124                 pos += elen;
1125         }
1126
1127         if (left != 0)
1128                 elems->parse_error = true;
1129
1130         return crc;
1131 }
1132
1133 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1134                                bool bss_notify)
1135 {
1136         struct ieee80211_local *local = sdata->local;
1137         struct ieee80211_tx_queue_params qparam;
1138         struct ieee80211_chanctx_conf *chanctx_conf;
1139         int ac;
1140         bool use_11b, enable_qos;
1141         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1142         int aCWmin, aCWmax;
1143
1144         if (!local->ops->conf_tx)
1145                 return;
1146
1147         if (local->hw.queues < IEEE80211_NUM_ACS)
1148                 return;
1149
1150         memset(&qparam, 0, sizeof(qparam));
1151
1152         rcu_read_lock();
1153         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1154         use_11b = (chanctx_conf &&
1155                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1156                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1157         rcu_read_unlock();
1158
1159         /*
1160          * By default disable QoS in STA mode for old access points, which do
1161          * not support 802.11e. New APs will provide proper queue parameters,
1162          * that we will configure later.
1163          */
1164         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1165
1166         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1167
1168         /* Set defaults according to 802.11-2007 Table 7-37 */
1169         aCWmax = 1023;
1170         if (use_11b)
1171                 aCWmin = 31;
1172         else
1173                 aCWmin = 15;
1174
1175         /* Confiure old 802.11b/g medium access rules. */
1176         qparam.cw_max = aCWmax;
1177         qparam.cw_min = aCWmin;
1178         qparam.txop = 0;
1179         qparam.aifs = 2;
1180
1181         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1182                 /* Update if QoS is enabled. */
1183                 if (enable_qos) {
1184                         switch (ac) {
1185                         case IEEE80211_AC_BK:
1186                                 qparam.cw_max = aCWmax;
1187                                 qparam.cw_min = aCWmin;
1188                                 qparam.txop = 0;
1189                                 if (is_ocb)
1190                                         qparam.aifs = 9;
1191                                 else
1192                                         qparam.aifs = 7;
1193                                 break;
1194                         /* never happens but let's not leave undefined */
1195                         default:
1196                         case IEEE80211_AC_BE:
1197                                 qparam.cw_max = aCWmax;
1198                                 qparam.cw_min = aCWmin;
1199                                 qparam.txop = 0;
1200                                 if (is_ocb)
1201                                         qparam.aifs = 6;
1202                                 else
1203                                         qparam.aifs = 3;
1204                                 break;
1205                         case IEEE80211_AC_VI:
1206                                 qparam.cw_max = aCWmin;
1207                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1208                                 if (is_ocb)
1209                                         qparam.txop = 0;
1210                                 else if (use_11b)
1211                                         qparam.txop = 6016/32;
1212                                 else
1213                                         qparam.txop = 3008/32;
1214
1215                                 if (is_ocb)
1216                                         qparam.aifs = 3;
1217                                 else
1218                                         qparam.aifs = 2;
1219                                 break;
1220                         case IEEE80211_AC_VO:
1221                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1222                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1223                                 if (is_ocb)
1224                                         qparam.txop = 0;
1225                                 else if (use_11b)
1226                                         qparam.txop = 3264/32;
1227                                 else
1228                                         qparam.txop = 1504/32;
1229                                 qparam.aifs = 2;
1230                                 break;
1231                         }
1232                 }
1233
1234                 qparam.uapsd = false;
1235
1236                 sdata->tx_conf[ac] = qparam;
1237                 drv_conf_tx(local, sdata, ac, &qparam);
1238         }
1239
1240         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1241             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1242                 sdata->vif.bss_conf.qos = enable_qos;
1243                 if (bss_notify)
1244                         ieee80211_bss_info_change_notify(sdata,
1245                                                          BSS_CHANGED_QOS);
1246         }
1247 }
1248
1249 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1250                          u16 transaction, u16 auth_alg, u16 status,
1251                          const u8 *extra, size_t extra_len, const u8 *da,
1252                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1253                          u32 tx_flags)
1254 {
1255         struct ieee80211_local *local = sdata->local;
1256         struct sk_buff *skb;
1257         struct ieee80211_mgmt *mgmt;
1258         int err;
1259
1260         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1261         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1262                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1263         if (!skb)
1264                 return;
1265
1266         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1267
1268         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1269         memset(mgmt, 0, 24 + 6);
1270         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1271                                           IEEE80211_STYPE_AUTH);
1272         memcpy(mgmt->da, da, ETH_ALEN);
1273         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1274         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1275         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1276         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1277         mgmt->u.auth.status_code = cpu_to_le16(status);
1278         if (extra)
1279                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1280
1281         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1282                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1283                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1284                 WARN_ON(err);
1285         }
1286
1287         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1288                                         tx_flags;
1289         ieee80211_tx_skb(sdata, skb);
1290 }
1291
1292 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1293                                     const u8 *bssid, u16 stype, u16 reason,
1294                                     bool send_frame, u8 *frame_buf)
1295 {
1296         struct ieee80211_local *local = sdata->local;
1297         struct sk_buff *skb;
1298         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1299
1300         /* build frame */
1301         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1302         mgmt->duration = 0; /* initialize only */
1303         mgmt->seq_ctrl = 0; /* initialize only */
1304         memcpy(mgmt->da, bssid, ETH_ALEN);
1305         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1306         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1307         /* u.deauth.reason_code == u.disassoc.reason_code */
1308         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1309
1310         if (send_frame) {
1311                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1312                                     IEEE80211_DEAUTH_FRAME_LEN);
1313                 if (!skb)
1314                         return;
1315
1316                 skb_reserve(skb, local->hw.extra_tx_headroom);
1317
1318                 /* copy in frame */
1319                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1320                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1321
1322                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1323                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1324                         IEEE80211_SKB_CB(skb)->flags |=
1325                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1326
1327                 ieee80211_tx_skb(sdata, skb);
1328         }
1329 }
1330
1331 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1332                                          u8 *buffer, size_t buffer_len,
1333                                          const u8 *ie, size_t ie_len,
1334                                          enum ieee80211_band band,
1335                                          u32 rate_mask,
1336                                          struct cfg80211_chan_def *chandef,
1337                                          size_t *offset)
1338 {
1339         struct ieee80211_supported_band *sband;
1340         u8 *pos = buffer, *end = buffer + buffer_len;
1341         size_t noffset;
1342         int supp_rates_len, i;
1343         u8 rates[32];
1344         int num_rates;
1345         int ext_rates_len;
1346         int shift;
1347         u32 rate_flags;
1348         bool have_80mhz = false;
1349
1350         *offset = 0;
1351
1352         sband = local->hw.wiphy->bands[band];
1353         if (WARN_ON_ONCE(!sband))
1354                 return 0;
1355
1356         rate_flags = ieee80211_chandef_rate_flags(chandef);
1357         shift = ieee80211_chandef_get_shift(chandef);
1358
1359         num_rates = 0;
1360         for (i = 0; i < sband->n_bitrates; i++) {
1361                 if ((BIT(i) & rate_mask) == 0)
1362                         continue; /* skip rate */
1363                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1364                         continue;
1365
1366                 rates[num_rates++] =
1367                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1368                                           (1 << shift) * 5);
1369         }
1370
1371         supp_rates_len = min_t(int, num_rates, 8);
1372
1373         if (end - pos < 2 + supp_rates_len)
1374                 goto out_err;
1375         *pos++ = WLAN_EID_SUPP_RATES;
1376         *pos++ = supp_rates_len;
1377         memcpy(pos, rates, supp_rates_len);
1378         pos += supp_rates_len;
1379
1380         /* insert "request information" if in custom IEs */
1381         if (ie && ie_len) {
1382                 static const u8 before_extrates[] = {
1383                         WLAN_EID_SSID,
1384                         WLAN_EID_SUPP_RATES,
1385                         WLAN_EID_REQUEST,
1386                 };
1387                 noffset = ieee80211_ie_split(ie, ie_len,
1388                                              before_extrates,
1389                                              ARRAY_SIZE(before_extrates),
1390                                              *offset);
1391                 if (end - pos < noffset - *offset)
1392                         goto out_err;
1393                 memcpy(pos, ie + *offset, noffset - *offset);
1394                 pos += noffset - *offset;
1395                 *offset = noffset;
1396         }
1397
1398         ext_rates_len = num_rates - supp_rates_len;
1399         if (ext_rates_len > 0) {
1400                 if (end - pos < 2 + ext_rates_len)
1401                         goto out_err;
1402                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1403                 *pos++ = ext_rates_len;
1404                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1405                 pos += ext_rates_len;
1406         }
1407
1408         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1409                 if (end - pos < 3)
1410                         goto out_err;
1411                 *pos++ = WLAN_EID_DS_PARAMS;
1412                 *pos++ = 1;
1413                 *pos++ = ieee80211_frequency_to_channel(
1414                                 chandef->chan->center_freq);
1415         }
1416
1417         /* insert custom IEs that go before HT */
1418         if (ie && ie_len) {
1419                 static const u8 before_ht[] = {
1420                         WLAN_EID_SSID,
1421                         WLAN_EID_SUPP_RATES,
1422                         WLAN_EID_REQUEST,
1423                         WLAN_EID_EXT_SUPP_RATES,
1424                         WLAN_EID_DS_PARAMS,
1425                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1426                 };
1427                 noffset = ieee80211_ie_split(ie, ie_len,
1428                                              before_ht, ARRAY_SIZE(before_ht),
1429                                              *offset);
1430                 if (end - pos < noffset - *offset)
1431                         goto out_err;
1432                 memcpy(pos, ie + *offset, noffset - *offset);
1433                 pos += noffset - *offset;
1434                 *offset = noffset;
1435         }
1436
1437         if (sband->ht_cap.ht_supported) {
1438                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1439                         goto out_err;
1440                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1441                                                 sband->ht_cap.cap);
1442         }
1443
1444         /*
1445          * If adding more here, adjust code in main.c
1446          * that calculates local->scan_ies_len.
1447          */
1448
1449         /* insert custom IEs that go before VHT */
1450         if (ie && ie_len) {
1451                 static const u8 before_vht[] = {
1452                         WLAN_EID_SSID,
1453                         WLAN_EID_SUPP_RATES,
1454                         WLAN_EID_REQUEST,
1455                         WLAN_EID_EXT_SUPP_RATES,
1456                         WLAN_EID_DS_PARAMS,
1457                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1458                         WLAN_EID_HT_CAPABILITY,
1459                         WLAN_EID_BSS_COEX_2040,
1460                         WLAN_EID_EXT_CAPABILITY,
1461                         WLAN_EID_SSID_LIST,
1462                         WLAN_EID_CHANNEL_USAGE,
1463                         WLAN_EID_INTERWORKING,
1464                         /* mesh ID can't happen here */
1465                         /* 60 GHz can't happen here right now */
1466                 };
1467                 noffset = ieee80211_ie_split(ie, ie_len,
1468                                              before_vht, ARRAY_SIZE(before_vht),
1469                                              *offset);
1470                 if (end - pos < noffset - *offset)
1471                         goto out_err;
1472                 memcpy(pos, ie + *offset, noffset - *offset);
1473                 pos += noffset - *offset;
1474                 *offset = noffset;
1475         }
1476
1477         /* Check if any channel in this sband supports at least 80 MHz */
1478         for (i = 0; i < sband->n_channels; i++) {
1479                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1480                                                 IEEE80211_CHAN_NO_80MHZ))
1481                         continue;
1482
1483                 have_80mhz = true;
1484                 break;
1485         }
1486
1487         if (sband->vht_cap.vht_supported && have_80mhz) {
1488                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1489                         goto out_err;
1490                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1491                                                  sband->vht_cap.cap);
1492         }
1493
1494         return pos - buffer;
1495  out_err:
1496         WARN_ONCE(1, "not enough space for preq IEs\n");
1497         return pos - buffer;
1498 }
1499
1500 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1501                              size_t buffer_len,
1502                              struct ieee80211_scan_ies *ie_desc,
1503                              const u8 *ie, size_t ie_len,
1504                              u8 bands_used, u32 *rate_masks,
1505                              struct cfg80211_chan_def *chandef)
1506 {
1507         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1508         int i;
1509
1510         memset(ie_desc, 0, sizeof(*ie_desc));
1511
1512         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1513                 if (bands_used & BIT(i)) {
1514                         pos += ieee80211_build_preq_ies_band(local,
1515                                                              buffer + pos,
1516                                                              buffer_len - pos,
1517                                                              ie, ie_len, i,
1518                                                              rate_masks[i],
1519                                                              chandef,
1520                                                              &custom_ie_offset);
1521                         ie_desc->ies[i] = buffer + old_pos;
1522                         ie_desc->len[i] = pos - old_pos;
1523                         old_pos = pos;
1524                 }
1525         }
1526
1527         /* add any remaining custom IEs */
1528         if (ie && ie_len) {
1529                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1530                               "not enough space for preq custom IEs\n"))
1531                         return pos;
1532                 memcpy(buffer + pos, ie + custom_ie_offset,
1533                        ie_len - custom_ie_offset);
1534                 ie_desc->common_ies = buffer + pos;
1535                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1536                 pos += ie_len - custom_ie_offset;
1537         }
1538
1539         return pos;
1540 };
1541
1542 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1543                                           const u8 *src, const u8 *dst,
1544                                           u32 ratemask,
1545                                           struct ieee80211_channel *chan,
1546                                           const u8 *ssid, size_t ssid_len,
1547                                           const u8 *ie, size_t ie_len,
1548                                           bool directed)
1549 {
1550         struct ieee80211_local *local = sdata->local;
1551         struct cfg80211_chan_def chandef;
1552         struct sk_buff *skb;
1553         struct ieee80211_mgmt *mgmt;
1554         int ies_len;
1555         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1556         struct ieee80211_scan_ies dummy_ie_desc;
1557
1558         /*
1559          * Do not send DS Channel parameter for directed probe requests
1560          * in order to maximize the chance that we get a response.  Some
1561          * badly-behaved APs don't respond when this parameter is included.
1562          */
1563         chandef.width = sdata->vif.bss_conf.chandef.width;
1564         if (directed)
1565                 chandef.chan = NULL;
1566         else
1567                 chandef.chan = chan;
1568
1569         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1570                                      100 + ie_len);
1571         if (!skb)
1572                 return NULL;
1573
1574         rate_masks[chan->band] = ratemask;
1575         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1576                                            skb_tailroom(skb), &dummy_ie_desc,
1577                                            ie, ie_len, BIT(chan->band),
1578                                            rate_masks, &chandef);
1579         skb_put(skb, ies_len);
1580
1581         if (dst) {
1582                 mgmt = (struct ieee80211_mgmt *) skb->data;
1583                 memcpy(mgmt->da, dst, ETH_ALEN);
1584                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1585         }
1586
1587         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1588
1589         return skb;
1590 }
1591
1592 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1593                               const u8 *src, const u8 *dst,
1594                               const u8 *ssid, size_t ssid_len,
1595                               const u8 *ie, size_t ie_len,
1596                               u32 ratemask, bool directed, u32 tx_flags,
1597                               struct ieee80211_channel *channel, bool scan)
1598 {
1599         struct sk_buff *skb;
1600
1601         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1602                                         ssid, ssid_len,
1603                                         ie, ie_len, directed);
1604         if (skb) {
1605                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1606                 if (scan)
1607                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1608                 else
1609                         ieee80211_tx_skb(sdata, skb);
1610         }
1611 }
1612
1613 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1614                             struct ieee802_11_elems *elems,
1615                             enum ieee80211_band band, u32 *basic_rates)
1616 {
1617         struct ieee80211_supported_band *sband;
1618         size_t num_rates;
1619         u32 supp_rates, rate_flags;
1620         int i, j, shift;
1621         sband = sdata->local->hw.wiphy->bands[band];
1622
1623         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1624         shift = ieee80211_vif_get_shift(&sdata->vif);
1625
1626         if (WARN_ON(!sband))
1627                 return 1;
1628
1629         num_rates = sband->n_bitrates;
1630         supp_rates = 0;
1631         for (i = 0; i < elems->supp_rates_len +
1632                      elems->ext_supp_rates_len; i++) {
1633                 u8 rate = 0;
1634                 int own_rate;
1635                 bool is_basic;
1636                 if (i < elems->supp_rates_len)
1637                         rate = elems->supp_rates[i];
1638                 else if (elems->ext_supp_rates)
1639                         rate = elems->ext_supp_rates
1640                                 [i - elems->supp_rates_len];
1641                 own_rate = 5 * (rate & 0x7f);
1642                 is_basic = !!(rate & 0x80);
1643
1644                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1645                         continue;
1646
1647                 for (j = 0; j < num_rates; j++) {
1648                         int brate;
1649                         if ((rate_flags & sband->bitrates[j].flags)
1650                             != rate_flags)
1651                                 continue;
1652
1653                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1654                                              1 << shift);
1655
1656                         if (brate == own_rate) {
1657                                 supp_rates |= BIT(j);
1658                                 if (basic_rates && is_basic)
1659                                         *basic_rates |= BIT(j);
1660                         }
1661                 }
1662         }
1663         return supp_rates;
1664 }
1665
1666 void ieee80211_stop_device(struct ieee80211_local *local)
1667 {
1668         ieee80211_led_radio(local, false);
1669         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1670
1671         cancel_work_sync(&local->reconfig_filter);
1672
1673         flush_workqueue(local->workqueue);
1674         drv_stop(local);
1675 }
1676
1677 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1678 {
1679         struct ieee80211_sub_if_data *sdata;
1680         struct ieee80211_chanctx *ctx;
1681
1682         /*
1683          * We get here if during resume the device can't be restarted properly.
1684          * We might also get here if this happens during HW reset, which is a
1685          * slightly different situation and we need to drop all connections in
1686          * the latter case.
1687          *
1688          * Ask cfg80211 to turn off all interfaces, this will result in more
1689          * warnings but at least we'll then get into a clean stopped state.
1690          */
1691
1692         local->resuming = false;
1693         local->suspended = false;
1694         local->started = false;
1695
1696         /* scheduled scan clearly can't be running any more, but tell
1697          * cfg80211 and clear local state
1698          */
1699         ieee80211_sched_scan_end(local);
1700
1701         list_for_each_entry(sdata, &local->interfaces, list)
1702                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1703
1704         /* Mark channel contexts as not being in the driver any more to avoid
1705          * removing them from the driver during the shutdown process...
1706          */
1707         mutex_lock(&local->chanctx_mtx);
1708         list_for_each_entry(ctx, &local->chanctx_list, list)
1709                 ctx->driver_present = false;
1710         mutex_unlock(&local->chanctx_mtx);
1711
1712         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1713 }
1714
1715 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1716                                      struct ieee80211_sub_if_data *sdata)
1717 {
1718         struct ieee80211_chanctx_conf *conf;
1719         struct ieee80211_chanctx *ctx;
1720
1721         if (!local->use_chanctx)
1722                 return;
1723
1724         mutex_lock(&local->chanctx_mtx);
1725         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1726                                          lockdep_is_held(&local->chanctx_mtx));
1727         if (conf) {
1728                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1729                 drv_assign_vif_chanctx(local, sdata, ctx);
1730         }
1731         mutex_unlock(&local->chanctx_mtx);
1732 }
1733
1734 int ieee80211_reconfig(struct ieee80211_local *local)
1735 {
1736         struct ieee80211_hw *hw = &local->hw;
1737         struct ieee80211_sub_if_data *sdata;
1738         struct ieee80211_chanctx *ctx;
1739         struct sta_info *sta;
1740         int res, i;
1741         bool reconfig_due_to_wowlan = false;
1742         struct ieee80211_sub_if_data *sched_scan_sdata;
1743         struct cfg80211_sched_scan_request *sched_scan_req;
1744         bool sched_scan_stopped = false;
1745
1746         /* nothing to do if HW shouldn't run */
1747         if (!local->open_count)
1748                 goto wake_up;
1749
1750 #ifdef CONFIG_PM
1751         if (local->suspended)
1752                 local->resuming = true;
1753
1754         if (local->wowlan) {
1755                 res = drv_resume(local);
1756                 local->wowlan = false;
1757                 if (res < 0) {
1758                         local->resuming = false;
1759                         return res;
1760                 }
1761                 if (res == 0)
1762                         goto wake_up;
1763                 WARN_ON(res > 1);
1764                 /*
1765                  * res is 1, which means the driver requested
1766                  * to go through a regular reset on wakeup.
1767                  */
1768                 reconfig_due_to_wowlan = true;
1769         }
1770 #endif
1771
1772         /*
1773          * Upon resume hardware can sometimes be goofy due to
1774          * various platform / driver / bus issues, so restarting
1775          * the device may at times not work immediately. Propagate
1776          * the error.
1777          */
1778         res = drv_start(local);
1779         if (res) {
1780                 if (local->suspended)
1781                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1782                 else
1783                         WARN(1, "Hardware became unavailable during restart.\n");
1784                 ieee80211_handle_reconfig_failure(local);
1785                 return res;
1786         }
1787
1788         /* setup fragmentation threshold */
1789         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1790
1791         /* setup RTS threshold */
1792         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1793
1794         /* reset coverage class */
1795         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1796
1797         ieee80211_led_radio(local, true);
1798         ieee80211_mod_tpt_led_trig(local,
1799                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1800
1801         /* add interfaces */
1802         sdata = rtnl_dereference(local->monitor_sdata);
1803         if (sdata) {
1804                 /* in HW restart it exists already */
1805                 WARN_ON(local->resuming);
1806                 res = drv_add_interface(local, sdata);
1807                 if (WARN_ON(res)) {
1808                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1809                         synchronize_net();
1810                         kfree(sdata);
1811                 }
1812         }
1813
1814         list_for_each_entry(sdata, &local->interfaces, list) {
1815                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1816                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1817                     ieee80211_sdata_running(sdata)) {
1818                         res = drv_add_interface(local, sdata);
1819                         if (WARN_ON(res))
1820                                 break;
1821                 }
1822         }
1823
1824         /* If adding any of the interfaces failed above, roll back and
1825          * report failure.
1826          */
1827         if (res) {
1828                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1829                                                      list)
1830                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1831                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1832                             ieee80211_sdata_running(sdata))
1833                                 drv_remove_interface(local, sdata);
1834                 ieee80211_handle_reconfig_failure(local);
1835                 return res;
1836         }
1837
1838         /* add channel contexts */
1839         if (local->use_chanctx) {
1840                 mutex_lock(&local->chanctx_mtx);
1841                 list_for_each_entry(ctx, &local->chanctx_list, list)
1842                         if (ctx->replace_state !=
1843                             IEEE80211_CHANCTX_REPLACES_OTHER)
1844                                 WARN_ON(drv_add_chanctx(local, ctx));
1845                 mutex_unlock(&local->chanctx_mtx);
1846
1847                 list_for_each_entry(sdata, &local->interfaces, list) {
1848                         if (!ieee80211_sdata_running(sdata))
1849                                 continue;
1850                         ieee80211_assign_chanctx(local, sdata);
1851                 }
1852
1853                 sdata = rtnl_dereference(local->monitor_sdata);
1854                 if (sdata && ieee80211_sdata_running(sdata))
1855                         ieee80211_assign_chanctx(local, sdata);
1856         }
1857
1858         /* add STAs back */
1859         mutex_lock(&local->sta_mtx);
1860         list_for_each_entry(sta, &local->sta_list, list) {
1861                 enum ieee80211_sta_state state;
1862
1863                 if (!sta->uploaded)
1864                         continue;
1865
1866                 /* AP-mode stations will be added later */
1867                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1868                         continue;
1869
1870                 for (state = IEEE80211_STA_NOTEXIST;
1871                      state < sta->sta_state; state++)
1872                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1873                                               state + 1));
1874         }
1875         mutex_unlock(&local->sta_mtx);
1876
1877         /* reconfigure tx conf */
1878         if (hw->queues >= IEEE80211_NUM_ACS) {
1879                 list_for_each_entry(sdata, &local->interfaces, list) {
1880                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1881                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1882                             !ieee80211_sdata_running(sdata))
1883                                 continue;
1884
1885                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1886                                 drv_conf_tx(local, sdata, i,
1887                                             &sdata->tx_conf[i]);
1888                 }
1889         }
1890
1891         /* reconfigure hardware */
1892         ieee80211_hw_config(local, ~0);
1893
1894         ieee80211_configure_filter(local);
1895
1896         /* Finally also reconfigure all the BSS information */
1897         list_for_each_entry(sdata, &local->interfaces, list) {
1898                 u32 changed;
1899
1900                 if (!ieee80211_sdata_running(sdata))
1901                         continue;
1902
1903                 /* common change flags for all interface types */
1904                 changed = BSS_CHANGED_ERP_CTS_PROT |
1905                           BSS_CHANGED_ERP_PREAMBLE |
1906                           BSS_CHANGED_ERP_SLOT |
1907                           BSS_CHANGED_HT |
1908                           BSS_CHANGED_BASIC_RATES |
1909                           BSS_CHANGED_BEACON_INT |
1910                           BSS_CHANGED_BSSID |
1911                           BSS_CHANGED_CQM |
1912                           BSS_CHANGED_QOS |
1913                           BSS_CHANGED_IDLE |
1914                           BSS_CHANGED_TXPOWER;
1915
1916                 switch (sdata->vif.type) {
1917                 case NL80211_IFTYPE_STATION:
1918                         changed |= BSS_CHANGED_ASSOC |
1919                                    BSS_CHANGED_ARP_FILTER |
1920                                    BSS_CHANGED_PS;
1921
1922                         /* Re-send beacon info report to the driver */
1923                         if (sdata->u.mgd.have_beacon)
1924                                 changed |= BSS_CHANGED_BEACON_INFO;
1925
1926                         sdata_lock(sdata);
1927                         ieee80211_bss_info_change_notify(sdata, changed);
1928                         sdata_unlock(sdata);
1929                         break;
1930                 case NL80211_IFTYPE_OCB:
1931                         changed |= BSS_CHANGED_OCB;
1932                         ieee80211_bss_info_change_notify(sdata, changed);
1933                         break;
1934                 case NL80211_IFTYPE_ADHOC:
1935                         changed |= BSS_CHANGED_IBSS;
1936                         /* fall through */
1937                 case NL80211_IFTYPE_AP:
1938                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1939
1940                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1941                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1942
1943                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1944                                         drv_start_ap(local, sdata);
1945                         }
1946
1947                         /* fall through */
1948                 case NL80211_IFTYPE_MESH_POINT:
1949                         if (sdata->vif.bss_conf.enable_beacon) {
1950                                 changed |= BSS_CHANGED_BEACON |
1951                                            BSS_CHANGED_BEACON_ENABLED;
1952                                 ieee80211_bss_info_change_notify(sdata, changed);
1953                         }
1954                         break;
1955                 case NL80211_IFTYPE_WDS:
1956                 case NL80211_IFTYPE_AP_VLAN:
1957                 case NL80211_IFTYPE_MONITOR:
1958                 case NL80211_IFTYPE_P2P_DEVICE:
1959                         /* nothing to do */
1960                         break;
1961                 case NL80211_IFTYPE_UNSPECIFIED:
1962                 case NUM_NL80211_IFTYPES:
1963                 case NL80211_IFTYPE_P2P_CLIENT:
1964                 case NL80211_IFTYPE_P2P_GO:
1965                         WARN_ON(1);
1966                         break;
1967                 }
1968         }
1969
1970         ieee80211_recalc_ps(local, -1);
1971
1972         /*
1973          * The sta might be in psm against the ap (e.g. because
1974          * this was the state before a hw restart), so we
1975          * explicitly send a null packet in order to make sure
1976          * it'll sync against the ap (and get out of psm).
1977          */
1978         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1979                 list_for_each_entry(sdata, &local->interfaces, list) {
1980                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1981                                 continue;
1982                         if (!sdata->u.mgd.associated)
1983                                 continue;
1984
1985                         ieee80211_send_nullfunc(local, sdata, 0);
1986                 }
1987         }
1988
1989         /* APs are now beaconing, add back stations */
1990         mutex_lock(&local->sta_mtx);
1991         list_for_each_entry(sta, &local->sta_list, list) {
1992                 enum ieee80211_sta_state state;
1993
1994                 if (!sta->uploaded)
1995                         continue;
1996
1997                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1998                         continue;
1999
2000                 for (state = IEEE80211_STA_NOTEXIST;
2001                      state < sta->sta_state; state++)
2002                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2003                                               state + 1));
2004         }
2005         mutex_unlock(&local->sta_mtx);
2006
2007         /* add back keys */
2008         list_for_each_entry(sdata, &local->interfaces, list)
2009                 if (ieee80211_sdata_running(sdata))
2010                         ieee80211_enable_keys(sdata);
2011
2012  wake_up:
2013         local->in_reconfig = false;
2014         barrier();
2015
2016         if (local->monitors == local->open_count && local->monitors > 0)
2017                 ieee80211_add_virtual_monitor(local);
2018
2019         /*
2020          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2021          * sessions can be established after a resume.
2022          *
2023          * Also tear down aggregation sessions since reconfiguring
2024          * them in a hardware restart scenario is not easily done
2025          * right now, and the hardware will have lost information
2026          * about the sessions, but we and the AP still think they
2027          * are active. This is really a workaround though.
2028          */
2029         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2030                 mutex_lock(&local->sta_mtx);
2031
2032                 list_for_each_entry(sta, &local->sta_list, list) {
2033                         ieee80211_sta_tear_down_BA_sessions(
2034                                         sta, AGG_STOP_LOCAL_REQUEST);
2035                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2036                 }
2037
2038                 mutex_unlock(&local->sta_mtx);
2039         }
2040
2041         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2042                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2043                                         false);
2044
2045         /*
2046          * Reconfigure sched scan if it was interrupted by FW restart or
2047          * suspend.
2048          */
2049         mutex_lock(&local->mtx);
2050         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2051                                                 lockdep_is_held(&local->mtx));
2052         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2053                                                 lockdep_is_held(&local->mtx));
2054         if (sched_scan_sdata && sched_scan_req)
2055                 /*
2056                  * Sched scan stopped, but we don't want to report it. Instead,
2057                  * we're trying to reschedule.
2058                  */
2059                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2060                                                          sched_scan_req))
2061                         sched_scan_stopped = true;
2062         mutex_unlock(&local->mtx);
2063
2064         if (sched_scan_stopped)
2065                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2066
2067         /*
2068          * If this is for hw restart things are still running.
2069          * We may want to change that later, however.
2070          */
2071         if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2072                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2073
2074         if (!local->suspended)
2075                 return 0;
2076
2077 #ifdef CONFIG_PM
2078         /* first set suspended false, then resuming */
2079         local->suspended = false;
2080         mb();
2081         local->resuming = false;
2082
2083         /* It's possible that we don't handle the scan completion in
2084          * time during suspend, so if it's still marked as completed
2085          * here, queue the work and flush it to clean things up.
2086          * Instead of calling the worker function directly here, we
2087          * really queue it to avoid potential races with other flows
2088          * scheduling the same work.
2089          */
2090         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2091                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2092                 flush_delayed_work(&local->scan_work);
2093         }
2094
2095         if (local->open_count && !reconfig_due_to_wowlan)
2096                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2097
2098         list_for_each_entry(sdata, &local->interfaces, list) {
2099                 if (!ieee80211_sdata_running(sdata))
2100                         continue;
2101                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2102                         ieee80211_sta_restart(sdata);
2103         }
2104
2105         mod_timer(&local->sta_cleanup, jiffies + 1);
2106 #else
2107         WARN_ON(1);
2108 #endif
2109
2110         return 0;
2111 }
2112
2113 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2114 {
2115         struct ieee80211_sub_if_data *sdata;
2116         struct ieee80211_local *local;
2117         struct ieee80211_key *key;
2118
2119         if (WARN_ON(!vif))
2120                 return;
2121
2122         sdata = vif_to_sdata(vif);
2123         local = sdata->local;
2124
2125         if (WARN_ON(!local->resuming))
2126                 return;
2127
2128         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2129                 return;
2130
2131         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2132
2133         mutex_lock(&local->key_mtx);
2134         list_for_each_entry(key, &sdata->key_list, list)
2135                 key->flags |= KEY_FLAG_TAINTED;
2136         mutex_unlock(&local->key_mtx);
2137 }
2138 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2139
2140 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2141 {
2142         struct ieee80211_local *local = sdata->local;
2143         struct ieee80211_chanctx_conf *chanctx_conf;
2144         struct ieee80211_chanctx *chanctx;
2145
2146         mutex_lock(&local->chanctx_mtx);
2147
2148         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2149                                         lockdep_is_held(&local->chanctx_mtx));
2150
2151         if (WARN_ON_ONCE(!chanctx_conf))
2152                 goto unlock;
2153
2154         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2155         ieee80211_recalc_smps_chanctx(local, chanctx);
2156  unlock:
2157         mutex_unlock(&local->chanctx_mtx);
2158 }
2159
2160 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2161 {
2162         struct ieee80211_local *local = sdata->local;
2163         struct ieee80211_chanctx_conf *chanctx_conf;
2164         struct ieee80211_chanctx *chanctx;
2165
2166         mutex_lock(&local->chanctx_mtx);
2167
2168         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2169                                         lockdep_is_held(&local->chanctx_mtx));
2170
2171         if (WARN_ON_ONCE(!chanctx_conf))
2172                 goto unlock;
2173
2174         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2175         ieee80211_recalc_chanctx_min_def(local, chanctx);
2176  unlock:
2177         mutex_unlock(&local->chanctx_mtx);
2178 }
2179
2180 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2181 {
2182         int i;
2183
2184         for (i = 0; i < n_ids; i++)
2185                 if (ids[i] == id)
2186                         return true;
2187         return false;
2188 }
2189
2190 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2191                               const u8 *ids, int n_ids,
2192                               const u8 *after_ric, int n_after_ric,
2193                               size_t offset)
2194 {
2195         size_t pos = offset;
2196
2197         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2198                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2199                         pos += 2 + ies[pos + 1];
2200
2201                         while (pos < ielen &&
2202                                !ieee80211_id_in_list(after_ric, n_after_ric,
2203                                                      ies[pos]))
2204                                 pos += 2 + ies[pos + 1];
2205                 } else {
2206                         pos += 2 + ies[pos + 1];
2207                 }
2208         }
2209
2210         return pos;
2211 }
2212
2213 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2214                           const u8 *ids, int n_ids, size_t offset)
2215 {
2216         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2217 }
2218 EXPORT_SYMBOL(ieee80211_ie_split);
2219
2220 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2221 {
2222         size_t pos = offset;
2223
2224         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2225                 pos += 2 + ies[pos + 1];
2226
2227         return pos;
2228 }
2229
2230 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2231                                             int rssi_min_thold,
2232                                             int rssi_max_thold)
2233 {
2234         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2235
2236         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2237                 return;
2238
2239         /*
2240          * Scale up threshold values before storing it, as the RSSI averaging
2241          * algorithm uses a scaled up value as well. Change this scaling
2242          * factor if the RSSI averaging algorithm changes.
2243          */
2244         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2245         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2246 }
2247
2248 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2249                                     int rssi_min_thold,
2250                                     int rssi_max_thold)
2251 {
2252         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2253
2254         WARN_ON(rssi_min_thold == rssi_max_thold ||
2255                 rssi_min_thold > rssi_max_thold);
2256
2257         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2258                                        rssi_max_thold);
2259 }
2260 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2261
2262 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2263 {
2264         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2265
2266         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2267 }
2268 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2269
2270 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2271                               u16 cap)
2272 {
2273         __le16 tmp;
2274
2275         *pos++ = WLAN_EID_HT_CAPABILITY;
2276         *pos++ = sizeof(struct ieee80211_ht_cap);
2277         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2278
2279         /* capability flags */
2280         tmp = cpu_to_le16(cap);
2281         memcpy(pos, &tmp, sizeof(u16));
2282         pos += sizeof(u16);
2283
2284         /* AMPDU parameters */
2285         *pos++ = ht_cap->ampdu_factor |
2286                  (ht_cap->ampdu_density <<
2287                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2288
2289         /* MCS set */
2290         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2291         pos += sizeof(ht_cap->mcs);
2292
2293         /* extended capabilities */
2294         pos += sizeof(__le16);
2295
2296         /* BF capabilities */
2297         pos += sizeof(__le32);
2298
2299         /* antenna selection */
2300         pos += sizeof(u8);
2301
2302         return pos;
2303 }
2304
2305 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2306                                u32 cap)
2307 {
2308         __le32 tmp;
2309
2310         *pos++ = WLAN_EID_VHT_CAPABILITY;
2311         *pos++ = sizeof(struct ieee80211_vht_cap);
2312         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2313
2314         /* capability flags */
2315         tmp = cpu_to_le32(cap);
2316         memcpy(pos, &tmp, sizeof(u32));
2317         pos += sizeof(u32);
2318
2319         /* VHT MCS set */
2320         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2321         pos += sizeof(vht_cap->vht_mcs);
2322
2323         return pos;
2324 }
2325
2326 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2327                                const struct cfg80211_chan_def *chandef,
2328                                u16 prot_mode)
2329 {
2330         struct ieee80211_ht_operation *ht_oper;
2331         /* Build HT Information */
2332         *pos++ = WLAN_EID_HT_OPERATION;
2333         *pos++ = sizeof(struct ieee80211_ht_operation);
2334         ht_oper = (struct ieee80211_ht_operation *)pos;
2335         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2336                                         chandef->chan->center_freq);
2337         switch (chandef->width) {
2338         case NL80211_CHAN_WIDTH_160:
2339         case NL80211_CHAN_WIDTH_80P80:
2340         case NL80211_CHAN_WIDTH_80:
2341         case NL80211_CHAN_WIDTH_40:
2342                 if (chandef->center_freq1 > chandef->chan->center_freq)
2343                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2344                 else
2345                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2346                 break;
2347         default:
2348                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2349                 break;
2350         }
2351         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2352             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2353             chandef->width != NL80211_CHAN_WIDTH_20)
2354                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2355
2356         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2357         ht_oper->stbc_param = 0x0000;
2358
2359         /* It seems that Basic MCS set and Supported MCS set
2360            are identical for the first 10 bytes */
2361         memset(&ht_oper->basic_set, 0, 16);
2362         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2363
2364         return pos + sizeof(struct ieee80211_ht_operation);
2365 }
2366
2367 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2368                                 const struct cfg80211_chan_def *chandef)
2369 {
2370         struct ieee80211_vht_operation *vht_oper;
2371
2372         *pos++ = WLAN_EID_VHT_OPERATION;
2373         *pos++ = sizeof(struct ieee80211_vht_operation);
2374         vht_oper = (struct ieee80211_vht_operation *)pos;
2375         vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2376                                                         chandef->center_freq1);
2377         if (chandef->center_freq2)
2378                 vht_oper->center_freq_seg2_idx =
2379                         ieee80211_frequency_to_channel(chandef->center_freq2);
2380
2381         switch (chandef->width) {
2382         case NL80211_CHAN_WIDTH_160:
2383                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2384                 break;
2385         case NL80211_CHAN_WIDTH_80P80:
2386                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2387                 break;
2388         case NL80211_CHAN_WIDTH_80:
2389                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2390                 break;
2391         default:
2392                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2393                 break;
2394         }
2395
2396         /* don't require special VHT peer rates */
2397         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2398
2399         return pos + sizeof(struct ieee80211_vht_operation);
2400 }
2401
2402 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2403                                   const struct ieee80211_ht_operation *ht_oper,
2404                                   struct cfg80211_chan_def *chandef)
2405 {
2406         enum nl80211_channel_type channel_type;
2407
2408         if (!ht_oper) {
2409                 cfg80211_chandef_create(chandef, control_chan,
2410                                         NL80211_CHAN_NO_HT);
2411                 return;
2412         }
2413
2414         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2415         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2416                 channel_type = NL80211_CHAN_HT20;
2417                 break;
2418         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2419                 channel_type = NL80211_CHAN_HT40PLUS;
2420                 break;
2421         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2422                 channel_type = NL80211_CHAN_HT40MINUS;
2423                 break;
2424         default:
2425                 channel_type = NL80211_CHAN_NO_HT;
2426         }
2427
2428         cfg80211_chandef_create(chandef, control_chan, channel_type);
2429 }
2430
2431 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2432                              const struct ieee80211_supported_band *sband,
2433                              const u8 *srates, int srates_len, u32 *rates)
2434 {
2435         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2436         int shift = ieee80211_chandef_get_shift(chandef);
2437         struct ieee80211_rate *br;
2438         int brate, rate, i, j, count = 0;
2439
2440         *rates = 0;
2441
2442         for (i = 0; i < srates_len; i++) {
2443                 rate = srates[i] & 0x7f;
2444
2445                 for (j = 0; j < sband->n_bitrates; j++) {
2446                         br = &sband->bitrates[j];
2447                         if ((rate_flags & br->flags) != rate_flags)
2448                                 continue;
2449
2450                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2451                         if (brate == rate) {
2452                                 *rates |= BIT(j);
2453                                 count++;
2454                                 break;
2455                         }
2456                 }
2457         }
2458         return count;
2459 }
2460
2461 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2462                             struct sk_buff *skb, bool need_basic,
2463                             enum ieee80211_band band)
2464 {
2465         struct ieee80211_local *local = sdata->local;
2466         struct ieee80211_supported_band *sband;
2467         int rate, shift;
2468         u8 i, rates, *pos;
2469         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2470         u32 rate_flags;
2471
2472         shift = ieee80211_vif_get_shift(&sdata->vif);
2473         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2474         sband = local->hw.wiphy->bands[band];
2475         rates = 0;
2476         for (i = 0; i < sband->n_bitrates; i++) {
2477                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2478                         continue;
2479                 rates++;
2480         }
2481         if (rates > 8)
2482                 rates = 8;
2483
2484         if (skb_tailroom(skb) < rates + 2)
2485                 return -ENOMEM;
2486
2487         pos = skb_put(skb, rates + 2);
2488         *pos++ = WLAN_EID_SUPP_RATES;
2489         *pos++ = rates;
2490         for (i = 0; i < rates; i++) {
2491                 u8 basic = 0;
2492                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2493                         continue;
2494
2495                 if (need_basic && basic_rates & BIT(i))
2496                         basic = 0x80;
2497                 rate = sband->bitrates[i].bitrate;
2498                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2499                                     5 * (1 << shift));
2500                 *pos++ = basic | (u8) rate;
2501         }
2502
2503         return 0;
2504 }
2505
2506 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2507                                 struct sk_buff *skb, bool need_basic,
2508                                 enum ieee80211_band band)
2509 {
2510         struct ieee80211_local *local = sdata->local;
2511         struct ieee80211_supported_band *sband;
2512         int rate, shift;
2513         u8 i, exrates, *pos;
2514         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2515         u32 rate_flags;
2516
2517         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2518         shift = ieee80211_vif_get_shift(&sdata->vif);
2519
2520         sband = local->hw.wiphy->bands[band];
2521         exrates = 0;
2522         for (i = 0; i < sband->n_bitrates; i++) {
2523                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2524                         continue;
2525                 exrates++;
2526         }
2527
2528         if (exrates > 8)
2529                 exrates -= 8;
2530         else
2531                 exrates = 0;
2532
2533         if (skb_tailroom(skb) < exrates + 2)
2534                 return -ENOMEM;
2535
2536         if (exrates) {
2537                 pos = skb_put(skb, exrates + 2);
2538                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2539                 *pos++ = exrates;
2540                 for (i = 8; i < sband->n_bitrates; i++) {
2541                         u8 basic = 0;
2542                         if ((rate_flags & sband->bitrates[i].flags)
2543                             != rate_flags)
2544                                 continue;
2545                         if (need_basic && basic_rates & BIT(i))
2546                                 basic = 0x80;
2547                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2548                                             5 * (1 << shift));
2549                         *pos++ = basic | (u8) rate;
2550                 }
2551         }
2552         return 0;
2553 }
2554
2555 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2556 {
2557         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2558         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2559
2560         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2561                 /* non-managed type inferfaces */
2562                 return 0;
2563         }
2564         return ifmgd->ave_beacon_signal / 16;
2565 }
2566 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2567
2568 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2569 {
2570         if (!mcs)
2571                 return 1;
2572
2573         /* TODO: consider rx_highest */
2574
2575         if (mcs->rx_mask[3])
2576                 return 4;
2577         if (mcs->rx_mask[2])
2578                 return 3;
2579         if (mcs->rx_mask[1])
2580                 return 2;
2581         return 1;
2582 }
2583
2584 /**
2585  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2586  * @local: mac80211 hw info struct
2587  * @status: RX status
2588  * @mpdu_len: total MPDU length (including FCS)
2589  * @mpdu_offset: offset into MPDU to calculate timestamp at
2590  *
2591  * This function calculates the RX timestamp at the given MPDU offset, taking
2592  * into account what the RX timestamp was. An offset of 0 will just normalize
2593  * the timestamp to TSF at beginning of MPDU reception.
2594  */
2595 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2596                                      struct ieee80211_rx_status *status,
2597                                      unsigned int mpdu_len,
2598                                      unsigned int mpdu_offset)
2599 {
2600         u64 ts = status->mactime;
2601         struct rate_info ri;
2602         u16 rate;
2603
2604         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2605                 return 0;
2606
2607         memset(&ri, 0, sizeof(ri));
2608
2609         /* Fill cfg80211 rate info */
2610         if (status->flag & RX_FLAG_HT) {
2611                 ri.mcs = status->rate_idx;
2612                 ri.flags |= RATE_INFO_FLAGS_MCS;
2613                 if (status->flag & RX_FLAG_40MHZ)
2614                         ri.bw = RATE_INFO_BW_40;
2615                 else
2616                         ri.bw = RATE_INFO_BW_20;
2617                 if (status->flag & RX_FLAG_SHORT_GI)
2618                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2619         } else if (status->flag & RX_FLAG_VHT) {
2620                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2621                 ri.mcs = status->rate_idx;
2622                 ri.nss = status->vht_nss;
2623                 if (status->flag & RX_FLAG_40MHZ)
2624                         ri.bw = RATE_INFO_BW_40;
2625                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2626                         ri.bw = RATE_INFO_BW_80;
2627                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2628                         ri.bw = RATE_INFO_BW_160;
2629                 else
2630                         ri.bw = RATE_INFO_BW_20;
2631                 if (status->flag & RX_FLAG_SHORT_GI)
2632                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2633         } else {
2634                 struct ieee80211_supported_band *sband;
2635                 int shift = 0;
2636                 int bitrate;
2637
2638                 if (status->flag & RX_FLAG_10MHZ) {
2639                         shift = 1;
2640                         ri.bw = RATE_INFO_BW_10;
2641                 } else if (status->flag & RX_FLAG_5MHZ) {
2642                         shift = 2;
2643                         ri.bw = RATE_INFO_BW_5;
2644                 } else {
2645                         ri.bw = RATE_INFO_BW_20;
2646                 }
2647
2648                 sband = local->hw.wiphy->bands[status->band];
2649                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2650                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2651         }
2652
2653         rate = cfg80211_calculate_bitrate(&ri);
2654         if (WARN_ONCE(!rate,
2655                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2656                       status->flag, status->rate_idx, status->vht_nss))
2657                 return 0;
2658
2659         /* rewind from end of MPDU */
2660         if (status->flag & RX_FLAG_MACTIME_END)
2661                 ts -= mpdu_len * 8 * 10 / rate;
2662
2663         ts += mpdu_offset * 8 * 10 / rate;
2664
2665         return ts;
2666 }
2667
2668 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2669 {
2670         struct ieee80211_sub_if_data *sdata;
2671         struct cfg80211_chan_def chandef;
2672
2673         mutex_lock(&local->mtx);
2674         mutex_lock(&local->iflist_mtx);
2675         list_for_each_entry(sdata, &local->interfaces, list) {
2676                 /* it might be waiting for the local->mtx, but then
2677                  * by the time it gets it, sdata->wdev.cac_started
2678                  * will no longer be true
2679                  */
2680                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2681
2682                 if (sdata->wdev.cac_started) {
2683                         chandef = sdata->vif.bss_conf.chandef;
2684                         ieee80211_vif_release_channel(sdata);
2685                         cfg80211_cac_event(sdata->dev,
2686                                            &chandef,
2687                                            NL80211_RADAR_CAC_ABORTED,
2688                                            GFP_KERNEL);
2689                 }
2690         }
2691         mutex_unlock(&local->iflist_mtx);
2692         mutex_unlock(&local->mtx);
2693 }
2694
2695 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2696 {
2697         struct ieee80211_local *local =
2698                 container_of(work, struct ieee80211_local, radar_detected_work);
2699         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2700         struct ieee80211_chanctx *ctx;
2701         int num_chanctx = 0;
2702
2703         mutex_lock(&local->chanctx_mtx);
2704         list_for_each_entry(ctx, &local->chanctx_list, list) {
2705                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2706                         continue;
2707
2708                 num_chanctx++;
2709                 chandef = ctx->conf.def;
2710         }
2711         mutex_unlock(&local->chanctx_mtx);
2712
2713         ieee80211_dfs_cac_cancel(local);
2714
2715         if (num_chanctx > 1)
2716                 /* XXX: multi-channel is not supported yet */
2717                 WARN_ON(1);
2718         else
2719                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2720 }
2721
2722 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2723 {
2724         struct ieee80211_local *local = hw_to_local(hw);
2725
2726         trace_api_radar_detected(local);
2727
2728         ieee80211_queue_work(hw, &local->radar_detected_work);
2729 }
2730 EXPORT_SYMBOL(ieee80211_radar_detected);
2731
2732 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2733 {
2734         u32 ret;
2735         int tmp;
2736
2737         switch (c->width) {
2738         case NL80211_CHAN_WIDTH_20:
2739                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2740                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2741                 break;
2742         case NL80211_CHAN_WIDTH_40:
2743                 c->width = NL80211_CHAN_WIDTH_20;
2744                 c->center_freq1 = c->chan->center_freq;
2745                 ret = IEEE80211_STA_DISABLE_40MHZ |
2746                       IEEE80211_STA_DISABLE_VHT;
2747                 break;
2748         case NL80211_CHAN_WIDTH_80:
2749                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2750                 /* n_P40 */
2751                 tmp /= 2;
2752                 /* freq_P40 */
2753                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2754                 c->width = NL80211_CHAN_WIDTH_40;
2755                 ret = IEEE80211_STA_DISABLE_VHT;
2756                 break;
2757         case NL80211_CHAN_WIDTH_80P80:
2758                 c->center_freq2 = 0;
2759                 c->width = NL80211_CHAN_WIDTH_80;
2760                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2761                       IEEE80211_STA_DISABLE_160MHZ;
2762                 break;
2763         case NL80211_CHAN_WIDTH_160:
2764                 /* n_P20 */
2765                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2766                 /* n_P80 */
2767                 tmp /= 4;
2768                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2769                 c->width = NL80211_CHAN_WIDTH_80;
2770                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2771                       IEEE80211_STA_DISABLE_160MHZ;
2772                 break;
2773         default:
2774         case NL80211_CHAN_WIDTH_20_NOHT:
2775                 WARN_ON_ONCE(1);
2776                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2777                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2778                 break;
2779         case NL80211_CHAN_WIDTH_5:
2780         case NL80211_CHAN_WIDTH_10:
2781                 WARN_ON_ONCE(1);
2782                 /* keep c->width */
2783                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2784                 break;
2785         }
2786
2787         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2788
2789         return ret;
2790 }
2791
2792 /*
2793  * Returns true if smps_mode_new is strictly more restrictive than
2794  * smps_mode_old.
2795  */
2796 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2797                                    enum ieee80211_smps_mode smps_mode_new)
2798 {
2799         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2800                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2801                 return false;
2802
2803         switch (smps_mode_old) {
2804         case IEEE80211_SMPS_STATIC:
2805                 return false;
2806         case IEEE80211_SMPS_DYNAMIC:
2807                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2808         case IEEE80211_SMPS_OFF:
2809                 return smps_mode_new != IEEE80211_SMPS_OFF;
2810         default:
2811                 WARN_ON(1);
2812         }
2813
2814         return false;
2815 }
2816
2817 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2818                               struct cfg80211_csa_settings *csa_settings)
2819 {
2820         struct sk_buff *skb;
2821         struct ieee80211_mgmt *mgmt;
2822         struct ieee80211_local *local = sdata->local;
2823         int freq;
2824         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2825                                sizeof(mgmt->u.action.u.chan_switch);
2826         u8 *pos;
2827
2828         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2829             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2830                 return -EOPNOTSUPP;
2831
2832         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2833                             5 + /* channel switch announcement element */
2834                             3 + /* secondary channel offset element */
2835                             8); /* mesh channel switch parameters element */
2836         if (!skb)
2837                 return -ENOMEM;
2838
2839         skb_reserve(skb, local->tx_headroom);
2840         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2841         memset(mgmt, 0, hdr_len);
2842         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2843                                           IEEE80211_STYPE_ACTION);
2844
2845         eth_broadcast_addr(mgmt->da);
2846         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2847         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2848                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2849         } else {
2850                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2851                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2852         }
2853         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2854         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2855         pos = skb_put(skb, 5);
2856         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2857         *pos++ = 3;                                             /* IE length */
2858         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2859         freq = csa_settings->chandef.chan->center_freq;
2860         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2861         *pos++ = csa_settings->count;                           /* count */
2862
2863         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2864                 enum nl80211_channel_type ch_type;
2865
2866                 skb_put(skb, 3);
2867                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2868                 *pos++ = 1;                                     /* IE length */
2869                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2870                 if (ch_type == NL80211_CHAN_HT40PLUS)
2871                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2872                 else
2873                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2874         }
2875
2876         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2877                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2878
2879                 skb_put(skb, 8);
2880                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2881                 *pos++ = 6;                                     /* IE length */
2882                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2883                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2884                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2885                 *pos++ |= csa_settings->block_tx ?
2886                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2887                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2888                 pos += 2;
2889                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2890                 pos += 2;
2891         }
2892
2893         ieee80211_tx_skb(sdata, skb);
2894         return 0;
2895 }
2896
2897 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2898 {
2899         return !(cs == NULL || cs->cipher == 0 ||
2900                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2901                  cs->hdr_len <= cs->key_idx_off ||
2902                  cs->key_idx_shift > 7 ||
2903                  cs->key_idx_mask == 0);
2904 }
2905
2906 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2907 {
2908         int i;
2909
2910         /* Ensure we have enough iftype bitmap space for all iftype values */
2911         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2912
2913         for (i = 0; i < n; i++)
2914                 if (!ieee80211_cs_valid(&cs[i]))
2915                         return false;
2916
2917         return true;
2918 }
2919
2920 const struct ieee80211_cipher_scheme *
2921 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2922                  enum nl80211_iftype iftype)
2923 {
2924         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2925         int n = local->hw.n_cipher_schemes;
2926         int i;
2927         const struct ieee80211_cipher_scheme *cs = NULL;
2928
2929         for (i = 0; i < n; i++) {
2930                 if (l[i].cipher == cipher) {
2931                         cs = &l[i];
2932                         break;
2933                 }
2934         }
2935
2936         if (!cs || !(cs->iftype & BIT(iftype)))
2937                 return NULL;
2938
2939         return cs;
2940 }
2941
2942 int ieee80211_cs_headroom(struct ieee80211_local *local,
2943                           struct cfg80211_crypto_settings *crypto,
2944                           enum nl80211_iftype iftype)
2945 {
2946         const struct ieee80211_cipher_scheme *cs;
2947         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2948         int i;
2949
2950         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2951                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2952                                       iftype);
2953
2954                 if (cs && headroom < cs->hdr_len)
2955                         headroom = cs->hdr_len;
2956         }
2957
2958         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2959         if (cs && headroom < cs->hdr_len)
2960                 headroom = cs->hdr_len;
2961
2962         return headroom;
2963 }
2964
2965 static bool
2966 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2967 {
2968         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2969         int skip;
2970
2971         if (end > 0)
2972                 return false;
2973
2974         /* End time is in the past, check for repetitions */
2975         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2976         if (data->count[i] < 255) {
2977                 if (data->count[i] <= skip) {
2978                         data->count[i] = 0;
2979                         return false;
2980                 }
2981
2982                 data->count[i] -= skip;
2983         }
2984
2985         data->desc[i].start += skip * data->desc[i].interval;
2986
2987         return true;
2988 }
2989
2990 static bool
2991 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2992                              s32 *offset)
2993 {
2994         bool ret = false;
2995         int i;
2996
2997         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2998                 s32 cur;
2999
3000                 if (!data->count[i])
3001                         continue;
3002
3003                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3004                         ret = true;
3005
3006                 cur = data->desc[i].start - tsf;
3007                 if (cur > *offset)
3008                         continue;
3009
3010                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3011                 if (cur > *offset)
3012                         *offset = cur;
3013         }
3014
3015         return ret;
3016 }
3017
3018 static u32
3019 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3020 {
3021         s32 offset = 0;
3022         int tries = 0;
3023         /*
3024          * arbitrary limit, used to avoid infinite loops when combined NoA
3025          * descriptors cover the full time period.
3026          */
3027         int max_tries = 5;
3028
3029         ieee80211_extend_absent_time(data, tsf, &offset);
3030         do {
3031                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3032                         break;
3033
3034                 tries++;
3035         } while (tries < max_tries);
3036
3037         return offset;
3038 }
3039
3040 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3041 {
3042         u32 next_offset = BIT(31) - 1;
3043         int i;
3044
3045         data->absent = 0;
3046         data->has_next_tsf = false;
3047         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3048                 s32 start;
3049
3050                 if (!data->count[i])
3051                         continue;
3052
3053                 ieee80211_extend_noa_desc(data, tsf, i);
3054                 start = data->desc[i].start - tsf;
3055                 if (start <= 0)
3056                         data->absent |= BIT(i);
3057
3058                 if (next_offset > start)
3059                         next_offset = start;
3060
3061                 data->has_next_tsf = true;
3062         }
3063
3064         if (data->absent)
3065                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3066
3067         data->next_tsf = tsf + next_offset;
3068 }
3069 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3070
3071 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3072                             struct ieee80211_noa_data *data, u32 tsf)
3073 {
3074         int ret = 0;
3075         int i;
3076
3077         memset(data, 0, sizeof(*data));
3078
3079         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3080                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3081
3082                 if (!desc->count || !desc->duration)
3083                         continue;
3084
3085                 data->count[i] = desc->count;
3086                 data->desc[i].start = le32_to_cpu(desc->start_time);
3087                 data->desc[i].duration = le32_to_cpu(desc->duration);
3088                 data->desc[i].interval = le32_to_cpu(desc->interval);
3089
3090                 if (data->count[i] > 1 &&
3091                     data->desc[i].interval < data->desc[i].duration)
3092                         continue;
3093
3094                 ieee80211_extend_noa_desc(data, tsf, i);
3095                 ret++;
3096         }
3097
3098         if (ret)
3099                 ieee80211_update_p2p_noa(data, tsf);
3100
3101         return ret;
3102 }
3103 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3104
3105 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3106                            struct ieee80211_sub_if_data *sdata)
3107 {
3108         u64 tsf = drv_get_tsf(local, sdata);
3109         u64 dtim_count = 0;
3110         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3111         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3112         struct ps_data *ps;
3113         u8 bcns_from_dtim;
3114
3115         if (tsf == -1ULL || !beacon_int || !dtim_period)
3116                 return;
3117
3118         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3119             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3120                 if (!sdata->bss)
3121                         return;
3122
3123                 ps = &sdata->bss->ps;
3124         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3125                 ps = &sdata->u.mesh.ps;
3126         } else {
3127                 return;
3128         }
3129
3130         /*
3131          * actually finds last dtim_count, mac80211 will update in
3132          * __beacon_add_tim().
3133          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3134          */
3135         do_div(tsf, beacon_int);
3136         bcns_from_dtim = do_div(tsf, dtim_period);
3137         /* just had a DTIM */
3138         if (!bcns_from_dtim)
3139                 dtim_count = 0;
3140         else
3141                 dtim_count = dtim_period - bcns_from_dtim;
3142
3143         ps->dtim_count = dtim_count;
3144 }
3145
3146 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3147                                          struct ieee80211_chanctx *ctx)
3148 {
3149         struct ieee80211_sub_if_data *sdata;
3150         u8 radar_detect = 0;
3151
3152         lockdep_assert_held(&local->chanctx_mtx);
3153
3154         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3155                 return 0;
3156
3157         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3158                 if (sdata->reserved_radar_required)
3159                         radar_detect |= BIT(sdata->reserved_chandef.width);
3160
3161         /*
3162          * An in-place reservation context should not have any assigned vifs
3163          * until it replaces the other context.
3164          */
3165         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3166                 !list_empty(&ctx->assigned_vifs));
3167
3168         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3169                 if (sdata->radar_required)
3170                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3171
3172         return radar_detect;
3173 }
3174
3175 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3176                                  const struct cfg80211_chan_def *chandef,
3177                                  enum ieee80211_chanctx_mode chanmode,
3178                                  u8 radar_detect)
3179 {
3180         struct ieee80211_local *local = sdata->local;
3181         struct ieee80211_sub_if_data *sdata_iter;
3182         enum nl80211_iftype iftype = sdata->wdev.iftype;
3183         int num[NUM_NL80211_IFTYPES];
3184         struct ieee80211_chanctx *ctx;
3185         int num_different_channels = 0;
3186         int total = 1;
3187
3188         lockdep_assert_held(&local->chanctx_mtx);
3189
3190         if (WARN_ON(hweight32(radar_detect) > 1))
3191                 return -EINVAL;
3192
3193         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3194                     !chandef->chan))
3195                 return -EINVAL;
3196
3197         if (chandef)
3198                 num_different_channels = 1;
3199
3200         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3201                 return -EINVAL;
3202
3203         /* Always allow software iftypes */
3204         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3205                 if (radar_detect)
3206                         return -EINVAL;
3207                 return 0;
3208         }
3209
3210         memset(num, 0, sizeof(num));
3211
3212         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3213                 num[iftype] = 1;
3214
3215         list_for_each_entry(ctx, &local->chanctx_list, list) {
3216                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3217                         continue;
3218                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3219                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3220                         num_different_channels++;
3221                         continue;
3222                 }
3223                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3224                     cfg80211_chandef_compatible(chandef,
3225                                                 &ctx->conf.def))
3226                         continue;
3227                 num_different_channels++;
3228         }
3229
3230         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3231                 struct wireless_dev *wdev_iter;
3232
3233                 wdev_iter = &sdata_iter->wdev;
3234
3235                 if (sdata_iter == sdata ||
3236                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3237                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3238                         continue;
3239
3240                 num[wdev_iter->iftype]++;
3241                 total++;
3242         }
3243
3244         if (total == 1 && !radar_detect)
3245                 return 0;
3246
3247         return cfg80211_check_combinations(local->hw.wiphy,
3248                                            num_different_channels,
3249                                            radar_detect, num);
3250 }
3251
3252 static void
3253 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3254                          void *data)
3255 {
3256         u32 *max_num_different_channels = data;
3257
3258         *max_num_different_channels = max(*max_num_different_channels,
3259                                           c->num_different_channels);
3260 }
3261
3262 int ieee80211_max_num_channels(struct ieee80211_local *local)
3263 {
3264         struct ieee80211_sub_if_data *sdata;
3265         int num[NUM_NL80211_IFTYPES] = {};
3266         struct ieee80211_chanctx *ctx;
3267         int num_different_channels = 0;
3268         u8 radar_detect = 0;
3269         u32 max_num_different_channels = 1;
3270         int err;
3271
3272         lockdep_assert_held(&local->chanctx_mtx);
3273
3274         list_for_each_entry(ctx, &local->chanctx_list, list) {
3275                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3276                         continue;
3277
3278                 num_different_channels++;
3279
3280                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3281         }
3282
3283         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3284                 num[sdata->wdev.iftype]++;
3285
3286         err = cfg80211_iter_combinations(local->hw.wiphy,
3287                                          num_different_channels, radar_detect,
3288                                          num, ieee80211_iter_max_chans,
3289                                          &max_num_different_channels);
3290         if (err < 0)
3291                 return err;
3292
3293         return max_num_different_channels;
3294 }
3295
3296 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3297 {
3298         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3299         *buf++ = 7; /* len */
3300         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3301         *buf++ = 0x50;
3302         *buf++ = 0xf2;
3303         *buf++ = 2; /* WME */
3304         *buf++ = 0; /* WME info */
3305         *buf++ = 1; /* WME ver */
3306         *buf++ = qosinfo; /* U-APSD no in use */
3307
3308         return buf;
3309 }