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_active_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
 636         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 637                 switch (sdata->vif.type) {
 638                 case NL80211_IFTYPE_MONITOR:
 639                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 640                                 continue;
 641                         break;
 642                 case NL80211_IFTYPE_AP_VLAN:
 643                         continue;
 644                 default:
 645                         break;
 646                 }
 647                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 648                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 649                         continue;
 650                 if (ieee80211_sdata_running(sdata))
 651                         iterator(data, sdata->vif.addr,
 652                                  &sdata->vif);
 653         }
 654
 655         sdata = rcu_dereference_check(local->monitor_sdata,
 656                                       lockdep_is_held(&local->iflist_mtx) ||
 657                                       lockdep_rtnl_is_held());
 658         if (sdata &&
 659             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 660              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 661                 iterator(data, sdata->vif.addr, &sdata->vif);
 662 }
 663
 664 void ieee80211_iterate_active_interfaces(
 665         struct ieee80211_hw *hw, u32 iter_flags,
 666         void (*iterator)(void *data, u8 *mac,
 667                          struct ieee80211_vif *vif),
 668         void *data)
 669 {
 670         struct ieee80211_local *local = hw_to_local(hw);
 671
 672         mutex_lock(&local->iflist_mtx);
 673         __iterate_active_interfaces(local, iter_flags, iterator, data);
 674         mutex_unlock(&local->iflist_mtx);
 675 }
 676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 677
 678 void ieee80211_iterate_active_interfaces_atomic(
 679         struct ieee80211_hw *hw, u32 iter_flags,
 680         void (*iterator)(void *data, u8 *mac,
 681                          struct ieee80211_vif *vif),
 682         void *data)
 683 {
 684         struct ieee80211_local *local = hw_to_local(hw);
 685
 686         rcu_read_lock();
 687         __iterate_active_interfaces(local, iter_flags, iterator, data);
 688         rcu_read_unlock();
 689 }
 690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 691
 692 void ieee80211_iterate_active_interfaces_rtnl(
 693         struct ieee80211_hw *hw, u32 iter_flags,
 694         void (*iterator)(void *data, u8 *mac,
 695                          struct ieee80211_vif *vif),
 696         void *data)
 697 {
 698         struct ieee80211_local *local = hw_to_local(hw);
 699
 700         ASSERT_RTNL();
 701
 702         __iterate_active_interfaces(local, iter_flags, iterator, data);
 703 }
 704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 705
 706 static void __iterate_stations(struct ieee80211_local *local,
 707                                void (*iterator)(void *data,
 708                                                 struct ieee80211_sta *sta),
 709                                void *data)
 710 {
 711         struct sta_info *sta;
 712
 713         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 714                 if (!sta->uploaded)
 715                         continue;
 716
 717                 iterator(data, &sta->sta);
 718         }
 719 }
 720
 721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 722                         void (*iterator)(void *data,
 723                                          struct ieee80211_sta *sta),
 724                         void *data)
 725 {
 726         struct ieee80211_local *local = hw_to_local(hw);
 727
 728         rcu_read_lock();
 729         __iterate_stations(local, iterator, data);
 730         rcu_read_unlock();
 731 }
 732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 733
 734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 735 {
 736         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 737
 738         if (!ieee80211_sdata_running(sdata) ||
 739             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 740                 return NULL;
 741         return &sdata->vif;
 742 }
 743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 744
 745 /*
 746  * Nothing should have been stuffed into the workqueue during
 747  * the suspend->resume cycle. If this WARN is seen then there
 748  * is a bug with either the driver suspend or something in
 749  * mac80211 stuffing into the workqueue which we haven't yet
 750  * cleared during mac80211's suspend cycle.
 751  */
 752 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 753 {
 754         if (WARN(local->suspended && !local->resuming,
 755                  "queueing ieee80211 work while going to suspend\n"))
 756                 return false;
 757
 758         return true;
 759 }
 760
 761 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 762 {
 763         struct ieee80211_local *local = hw_to_local(hw);
 764
 765         if (!ieee80211_can_queue_work(local))
 766                 return;
 767
 768         queue_work(local->workqueue, work);
 769 }
 770 EXPORT_SYMBOL(ieee80211_queue_work);
 771
 772 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 773                                   struct delayed_work *dwork,
 774                                   unsigned long delay)
 775 {
 776         struct ieee80211_local *local = hw_to_local(hw);
 777
 778         if (!ieee80211_can_queue_work(local))
 779                 return;
 780
 781         queue_delayed_work(local->workqueue, dwork, delay);
 782 }
 783 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 784
 785 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 786                                struct ieee802_11_elems *elems,
 787                                u64 filter, u32 crc)
 788 {
 789         size_t left = len;
 790         const u8 *pos = start;
 791         bool calc_crc = filter != 0;
 792         DECLARE_BITMAP(seen_elems, 256);
 793         const u8 *ie;
 794
 795         bitmap_zero(seen_elems, 256);
 796         memset(elems, 0, sizeof(*elems));
 797         elems->ie_start = start;
 798         elems->total_len = len;
 799
 800         while (left >= 2) {
 801                 u8 id, elen;
 802                 bool elem_parse_failed;
 803
 804                 id = *pos++;
 805                 elen = *pos++;
 806                 left -= 2;
 807
 808                 if (elen > left) {
 809                         elems->parse_error = true;
 810                         break;
 811                 }
 812
 813                 switch (id) {
 814                 case WLAN_EID_SSID:
 815                 case WLAN_EID_SUPP_RATES:
 816                 case WLAN_EID_FH_PARAMS:
 817                 case WLAN_EID_DS_PARAMS:
 818                 case WLAN_EID_CF_PARAMS:
 819                 case WLAN_EID_TIM:
 820                 case WLAN_EID_IBSS_PARAMS:
 821                 case WLAN_EID_CHALLENGE:
 822                 case WLAN_EID_RSN:
 823                 case WLAN_EID_ERP_INFO:
 824                 case WLAN_EID_EXT_SUPP_RATES:
 825                 case WLAN_EID_HT_CAPABILITY:
 826                 case WLAN_EID_HT_OPERATION:
 827                 case WLAN_EID_VHT_CAPABILITY:
 828                 case WLAN_EID_VHT_OPERATION:
 829                 case WLAN_EID_MESH_ID:
 830                 case WLAN_EID_MESH_CONFIG:
 831                 case WLAN_EID_PEER_MGMT:
 832                 case WLAN_EID_PREQ:
 833                 case WLAN_EID_PREP:
 834                 case WLAN_EID_PERR:
 835                 case WLAN_EID_RANN:
 836                 case WLAN_EID_CHANNEL_SWITCH:
 837                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 838                 case WLAN_EID_COUNTRY:
 839                 case WLAN_EID_PWR_CONSTRAINT:
 840                 case WLAN_EID_TIMEOUT_INTERVAL:
 841                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 842                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 843                 case WLAN_EID_CHAN_SWITCH_PARAM:
 844                 case WLAN_EID_EXT_CAPABILITY:
 845                 case WLAN_EID_CHAN_SWITCH_TIMING:
 846                 case WLAN_EID_LINK_ID:
 847                 /*
 848                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 849                  * that if the content gets bigger it might be needed more than once
 850                  */
 851                         if (test_bit(id, seen_elems)) {
 852                                 elems->parse_error = true;
 853                                 left -= elen;
 854                                 pos += elen;
 855                                 continue;
 856                         }
 857                         break;
 858                 }
 859
 860                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 861                         crc = crc32_be(crc, pos - 2, elen + 2);
 862
 863                 elem_parse_failed = false;
 864
 865                 switch (id) {
 866                 case WLAN_EID_LINK_ID:
 867                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 868                                 elem_parse_failed = true;
 869                                 break;
 870                         }
 871                         elems->lnk_id = (void *)(pos - 2);
 872                         break;
 873                 case WLAN_EID_CHAN_SWITCH_TIMING:
 874                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 875                                 elem_parse_failed = true;
 876                                 break;
 877                         }
 878                         elems->ch_sw_timing = (void *)pos;
 879                         break;
 880                 case WLAN_EID_EXT_CAPABILITY:
 881                         elems->ext_capab = pos;
 882                         elems->ext_capab_len = elen;
 883                         break;
 884                 case WLAN_EID_SSID:
 885                         elems->ssid = pos;
 886                         elems->ssid_len = elen;
 887                         break;
 888                 case WLAN_EID_SUPP_RATES:
 889                         elems->supp_rates = pos;
 890                         elems->supp_rates_len = elen;
 891                         break;
 892                 case WLAN_EID_DS_PARAMS:
 893                         if (elen >= 1)
 894                                 elems->ds_params = pos;
 895                         else
 896                                 elem_parse_failed = true;
 897                         break;
 898                 case WLAN_EID_TIM:
 899                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 900                                 elems->tim = (void *)pos;
 901                                 elems->tim_len = elen;
 902                         } else
 903                                 elem_parse_failed = true;
 904                         break;
 905                 case WLAN_EID_CHALLENGE:
 906                         elems->challenge = pos;
 907                         elems->challenge_len = elen;
 908                         break;
 909                 case WLAN_EID_VENDOR_SPECIFIC:
 910                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 911                             pos[2] == 0xf2) {
 912                                 /* Microsoft OUI (00:50:F2) */
 913
 914                                 if (calc_crc)
 915                                         crc = crc32_be(crc, pos - 2, elen + 2);
 916
 917                                 if (elen >= 5 && pos[3] == 2) {
 918                                         /* OUI Type 2 - WMM IE */
 919                                         if (pos[4] == 0) {
 920                                                 elems->wmm_info = pos;
 921                                                 elems->wmm_info_len = elen;
 922                                         } else if (pos[4] == 1) {
 923                                                 elems->wmm_param = pos;
 924                                                 elems->wmm_param_len = elen;
 925                                         }
 926                                 }
 927                         }
 928                         break;
 929                 case WLAN_EID_RSN:
 930                         elems->rsn = pos;
 931                         elems->rsn_len = elen;
 932                         break;
 933                 case WLAN_EID_ERP_INFO:
 934                         if (elen >= 1)
 935                                 elems->erp_info = pos;
 936                         else
 937                                 elem_parse_failed = true;
 938                         break;
 939                 case WLAN_EID_EXT_SUPP_RATES:
 940                         elems->ext_supp_rates = pos;
 941                         elems->ext_supp_rates_len = elen;
 942                         break;
 943                 case WLAN_EID_HT_CAPABILITY:
 944                         if (elen >= sizeof(struct ieee80211_ht_cap))
 945                                 elems->ht_cap_elem = (void *)pos;
 946                         else
 947                                 elem_parse_failed = true;
 948                         break;
 949                 case WLAN_EID_HT_OPERATION:
 950                         if (elen >= sizeof(struct ieee80211_ht_operation))
 951                                 elems->ht_operation = (void *)pos;
 952                         else
 953                                 elem_parse_failed = true;
 954                         break;
 955                 case WLAN_EID_VHT_CAPABILITY:
 956                         if (elen >= sizeof(struct ieee80211_vht_cap))
 957                                 elems->vht_cap_elem = (void *)pos;
 958                         else
 959                                 elem_parse_failed = true;
 960                         break;
 961                 case WLAN_EID_VHT_OPERATION:
 962                         if (elen >= sizeof(struct ieee80211_vht_operation))
 963                                 elems->vht_operation = (void *)pos;
 964                         else
 965                                 elem_parse_failed = true;
 966                         break;
 967                 case WLAN_EID_OPMODE_NOTIF:
 968                         if (elen > 0)
 969                                 elems->opmode_notif = pos;
 970                         else
 971                                 elem_parse_failed = true;
 972                         break;
 973                 case WLAN_EID_MESH_ID:
 974                         elems->mesh_id = pos;
 975                         elems->mesh_id_len = elen;
 976                         break;
 977                 case WLAN_EID_MESH_CONFIG:
 978                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 979                                 elems->mesh_config = (void *)pos;
 980                         else
 981                                 elem_parse_failed = true;
 982                         break;
 983                 case WLAN_EID_PEER_MGMT:
 984                         elems->peering = pos;
 985                         elems->peering_len = elen;
 986                         break;
 987                 case WLAN_EID_MESH_AWAKE_WINDOW:
 988                         if (elen >= 2)
 989                                 elems->awake_window = (void *)pos;
 990                         break;
 991                 case WLAN_EID_PREQ:
 992                         elems->preq = pos;
 993                         elems->preq_len = elen;
 994                         break;
 995                 case WLAN_EID_PREP:
 996                         elems->prep = pos;
 997                         elems->prep_len = elen;
 998                         break;
 999                 case WLAN_EID_PERR:
1000                         elems->perr = pos;
1001                         elems->perr_len = elen;
1002                         break;
1003                 case WLAN_EID_RANN:
1004                         if (elen >= sizeof(struct ieee80211_rann_ie))
1005                                 elems->rann = (void *)pos;
1006                         else
1007                                 elem_parse_failed = true;
1008                         break;
1009                 case WLAN_EID_CHANNEL_SWITCH:
1010                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->ch_switch_ie = (void *)pos;
1015                         break;
1016                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018                                 elem_parse_failed = true;
1019                                 break;
1020                         }
1021                         elems->ext_chansw_ie = (void *)pos;
1022                         break;
1023                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025                                 elem_parse_failed = true;
1026                                 break;
1027                         }
1028                         elems->sec_chan_offs = (void *)pos;
1029                         break;
1030                 case WLAN_EID_CHAN_SWITCH_PARAM:
1031                         if (elen !=
1032                             sizeof(*elems->mesh_chansw_params_ie)) {
1033                                 elem_parse_failed = true;
1034                                 break;
1035                         }
1036                         elems->mesh_chansw_params_ie = (void *)pos;
1037                         break;
1038                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1039                         if (!action ||
1040                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041                                 elem_parse_failed = true;
1042                                 break;
1043                         }
1044                         elems->wide_bw_chansw_ie = (void *)pos;
1045                         break;
1046                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1047                         if (action) {
1048                                 elem_parse_failed = true;
1049                                 break;
1050                         }
1051                         /*
1052                          * This is a bit tricky, but as we only care about
1053                          * the wide bandwidth channel switch element, so
1054                          * just parse it out manually.
1055                          */
1056                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1057                                               pos, elen);
1058                         if (ie) {
1059                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060                                         elems->wide_bw_chansw_ie =
1061                                                 (void *)(ie + 2);
1062                                 else
1063                                         elem_parse_failed = true;
1064                         }
1065                         break;
1066                 case WLAN_EID_COUNTRY:
1067                         elems->country_elem = pos;
1068                         elems->country_elem_len = elen;
1069                         break;
1070                 case WLAN_EID_PWR_CONSTRAINT:
1071                         if (elen != 1) {
1072                                 elem_parse_failed = true;
1073                                 break;
1074                         }
1075                         elems->pwr_constr_elem = pos;
1076                         break;
1077                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078                         /* Lots of different options exist, but we only care
1079                          * about the Dynamic Transmit Power Control element.
1080                          * First check for the Cisco OUI, then for the DTPC
1081                          * tag (0x00).
1082                          */
1083                         if (elen < 4) {
1084                                 elem_parse_failed = true;
1085                                 break;
1086                         }
1087
1088                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089                             pos[2] != 0x96 || pos[3] != 0x00)
1090                                 break;
1091
1092                         if (elen != 6) {
1093                                 elem_parse_failed = true;
1094                                 break;
1095                         }
1096
1097                         if (calc_crc)
1098                                 crc = crc32_be(crc, pos - 2, elen + 2);
1099
1100                         elems->cisco_dtpc_elem = pos;
1101                         break;
1102                 case WLAN_EID_TIMEOUT_INTERVAL:
1103                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104                                 elems->timeout_int = (void *)pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 default:
1109                         break;
1110                 }
1111
1112                 if (elem_parse_failed)
1113                         elems->parse_error = true;
1114                 else
1115                         __set_bit(id, seen_elems);
1116
1117                 left -= elen;
1118                 pos += elen;
1119         }
1120
1121         if (left != 0)
1122                 elems->parse_error = true;
1123
1124         return crc;
1125 }
1126
1127 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1128                                bool bss_notify)
1129 {
1130         struct ieee80211_local *local = sdata->local;
1131         struct ieee80211_tx_queue_params qparam;
1132         struct ieee80211_chanctx_conf *chanctx_conf;
1133         int ac;
1134         bool use_11b, enable_qos;
1135         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1136         int aCWmin, aCWmax;
1137
1138         if (!local->ops->conf_tx)
1139                 return;
1140
1141         if (local->hw.queues < IEEE80211_NUM_ACS)
1142                 return;
1143
1144         memset(&qparam, 0, sizeof(qparam));
1145
1146         rcu_read_lock();
1147         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148         use_11b = (chanctx_conf &&
1149                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1150                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1151         rcu_read_unlock();
1152
1153         /*
1154          * By default disable QoS in STA mode for old access points, which do
1155          * not support 802.11e. New APs will provide proper queue parameters,
1156          * that we will configure later.
1157          */
1158         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1159
1160         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1161
1162         /* Set defaults according to 802.11-2007 Table 7-37 */
1163         aCWmax = 1023;
1164         if (use_11b)
1165                 aCWmin = 31;
1166         else
1167                 aCWmin = 15;
1168
1169         /* Confiure old 802.11b/g medium access rules. */
1170         qparam.cw_max = aCWmax;
1171         qparam.cw_min = aCWmin;
1172         qparam.txop = 0;
1173         qparam.aifs = 2;
1174
1175         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176                 /* Update if QoS is enabled. */
1177                 if (enable_qos) {
1178                         switch (ac) {
1179                         case IEEE80211_AC_BK:
1180                                 qparam.cw_max = aCWmax;
1181                                 qparam.cw_min = aCWmin;
1182                                 qparam.txop = 0;
1183                                 if (is_ocb)
1184                                         qparam.aifs = 9;
1185                                 else
1186                                         qparam.aifs = 7;
1187                                 break;
1188                         /* never happens but let's not leave undefined */
1189                         default:
1190                         case IEEE80211_AC_BE:
1191                                 qparam.cw_max = aCWmax;
1192                                 qparam.cw_min = aCWmin;
1193                                 qparam.txop = 0;
1194                                 if (is_ocb)
1195                                         qparam.aifs = 6;
1196                                 else
1197                                         qparam.aifs = 3;
1198                                 break;
1199                         case IEEE80211_AC_VI:
1200                                 qparam.cw_max = aCWmin;
1201                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1202                                 if (is_ocb)
1203                                         qparam.txop = 0;
1204                                 else if (use_11b)
1205                                         qparam.txop = 6016/32;
1206                                 else
1207                                         qparam.txop = 3008/32;
1208
1209                                 if (is_ocb)
1210                                         qparam.aifs = 3;
1211                                 else
1212                                         qparam.aifs = 2;
1213                                 break;
1214                         case IEEE80211_AC_VO:
1215                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1217                                 if (is_ocb)
1218                                         qparam.txop = 0;
1219                                 else if (use_11b)
1220                                         qparam.txop = 3264/32;
1221                                 else
1222                                         qparam.txop = 1504/32;
1223                                 qparam.aifs = 2;
1224                                 break;
1225                         }
1226                 }
1227
1228                 qparam.uapsd = false;
1229
1230                 sdata->tx_conf[ac] = qparam;
1231                 drv_conf_tx(local, sdata, ac, &qparam);
1232         }
1233
1234         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1236                 sdata->vif.bss_conf.qos = enable_qos;
1237                 if (bss_notify)
1238                         ieee80211_bss_info_change_notify(sdata,
1239                                                          BSS_CHANGED_QOS);
1240         }
1241 }
1242
1243 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1244                          u16 transaction, u16 auth_alg, u16 status,
1245                          const u8 *extra, size_t extra_len, const u8 *da,
1246                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1247                          u32 tx_flags)
1248 {
1249         struct ieee80211_local *local = sdata->local;
1250         struct sk_buff *skb;
1251         struct ieee80211_mgmt *mgmt;
1252         int err;
1253
1254         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1255         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1257         if (!skb)
1258                 return;
1259
1260         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1261
1262         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263         memset(mgmt, 0, 24 + 6);
1264         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265                                           IEEE80211_STYPE_AUTH);
1266         memcpy(mgmt->da, da, ETH_ALEN);
1267         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1268         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1271         mgmt->u.auth.status_code = cpu_to_le16(status);
1272         if (extra)
1273                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1274
1275         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1278                 WARN_ON(err);
1279         }
1280
1281         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1282                                         tx_flags;
1283         ieee80211_tx_skb(sdata, skb);
1284 }
1285
1286 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287                                     const u8 *bssid, u16 stype, u16 reason,
1288                                     bool send_frame, u8 *frame_buf)
1289 {
1290         struct ieee80211_local *local = sdata->local;
1291         struct sk_buff *skb;
1292         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1293
1294         /* build frame */
1295         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296         mgmt->duration = 0; /* initialize only */
1297         mgmt->seq_ctrl = 0; /* initialize only */
1298         memcpy(mgmt->da, bssid, ETH_ALEN);
1299         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301         /* u.deauth.reason_code == u.disassoc.reason_code */
1302         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1303
1304         if (send_frame) {
1305                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306                                     IEEE80211_DEAUTH_FRAME_LEN);
1307                 if (!skb)
1308                         return;
1309
1310                 skb_reserve(skb, local->hw.extra_tx_headroom);
1311
1312                 /* copy in frame */
1313                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1315
1316                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318                         IEEE80211_SKB_CB(skb)->flags |=
1319                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1320
1321                 ieee80211_tx_skb(sdata, skb);
1322         }
1323 }
1324
1325 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326                                          u8 *buffer, size_t buffer_len,
1327                                          const u8 *ie, size_t ie_len,
1328                                          enum ieee80211_band band,
1329                                          u32 rate_mask,
1330                                          struct cfg80211_chan_def *chandef,
1331                                          size_t *offset)
1332 {
1333         struct ieee80211_supported_band *sband;
1334         u8 *pos = buffer, *end = buffer + buffer_len;
1335         size_t noffset;
1336         int supp_rates_len, i;
1337         u8 rates[32];
1338         int num_rates;
1339         int ext_rates_len;
1340         int shift;
1341         u32 rate_flags;
1342         bool have_80mhz = false;
1343
1344         *offset = 0;
1345
1346         sband = local->hw.wiphy->bands[band];
1347         if (WARN_ON_ONCE(!sband))
1348                 return 0;
1349
1350         rate_flags = ieee80211_chandef_rate_flags(chandef);
1351         shift = ieee80211_chandef_get_shift(chandef);
1352
1353         num_rates = 0;
1354         for (i = 0; i < sband->n_bitrates; i++) {
1355                 if ((BIT(i) & rate_mask) == 0)
1356                         continue; /* skip rate */
1357                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1358                         continue;
1359
1360                 rates[num_rates++] =
1361                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1362                                           (1 << shift) * 5);
1363         }
1364
1365         supp_rates_len = min_t(int, num_rates, 8);
1366
1367         if (end - pos < 2 + supp_rates_len)
1368                 goto out_err;
1369         *pos++ = WLAN_EID_SUPP_RATES;
1370         *pos++ = supp_rates_len;
1371         memcpy(pos, rates, supp_rates_len);
1372         pos += supp_rates_len;
1373
1374         /* insert "request information" if in custom IEs */
1375         if (ie && ie_len) {
1376                 static const u8 before_extrates[] = {
1377                         WLAN_EID_SSID,
1378                         WLAN_EID_SUPP_RATES,
1379                         WLAN_EID_REQUEST,
1380                 };
1381                 noffset = ieee80211_ie_split(ie, ie_len,
1382                                              before_extrates,
1383                                              ARRAY_SIZE(before_extrates),
1384                                              *offset);
1385                 if (end - pos < noffset - *offset)
1386                         goto out_err;
1387                 memcpy(pos, ie + *offset, noffset - *offset);
1388                 pos += noffset - *offset;
1389                 *offset = noffset;
1390         }
1391
1392         ext_rates_len = num_rates - supp_rates_len;
1393         if (ext_rates_len > 0) {
1394                 if (end - pos < 2 + ext_rates_len)
1395                         goto out_err;
1396                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1397                 *pos++ = ext_rates_len;
1398                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1399                 pos += ext_rates_len;
1400         }
1401
1402         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1403                 if (end - pos < 3)
1404                         goto out_err;
1405                 *pos++ = WLAN_EID_DS_PARAMS;
1406                 *pos++ = 1;
1407                 *pos++ = ieee80211_frequency_to_channel(
1408                                 chandef->chan->center_freq);
1409         }
1410
1411         /* insert custom IEs that go before HT */
1412         if (ie && ie_len) {
1413                 static const u8 before_ht[] = {
1414                         WLAN_EID_SSID,
1415                         WLAN_EID_SUPP_RATES,
1416                         WLAN_EID_REQUEST,
1417                         WLAN_EID_EXT_SUPP_RATES,
1418                         WLAN_EID_DS_PARAMS,
1419                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420                 };
1421                 noffset = ieee80211_ie_split(ie, ie_len,
1422                                              before_ht, ARRAY_SIZE(before_ht),
1423                                              *offset);
1424                 if (end - pos < noffset - *offset)
1425                         goto out_err;
1426                 memcpy(pos, ie + *offset, noffset - *offset);
1427                 pos += noffset - *offset;
1428                 *offset = noffset;
1429         }
1430
1431         if (sband->ht_cap.ht_supported) {
1432                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1433                         goto out_err;
1434                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1435                                                 sband->ht_cap.cap);
1436         }
1437
1438         /*
1439          * If adding more here, adjust code in main.c
1440          * that calculates local->scan_ies_len.
1441          */
1442
1443         /* insert custom IEs that go before VHT */
1444         if (ie && ie_len) {
1445                 static const u8 before_vht[] = {
1446                         WLAN_EID_SSID,
1447                         WLAN_EID_SUPP_RATES,
1448                         WLAN_EID_REQUEST,
1449                         WLAN_EID_EXT_SUPP_RATES,
1450                         WLAN_EID_DS_PARAMS,
1451                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1452                         WLAN_EID_HT_CAPABILITY,
1453                         WLAN_EID_BSS_COEX_2040,
1454                         WLAN_EID_EXT_CAPABILITY,
1455                         WLAN_EID_SSID_LIST,
1456                         WLAN_EID_CHANNEL_USAGE,
1457                         WLAN_EID_INTERWORKING,
1458                         /* mesh ID can't happen here */
1459                         /* 60 GHz can't happen here right now */
1460                 };
1461                 noffset = ieee80211_ie_split(ie, ie_len,
1462                                              before_vht, ARRAY_SIZE(before_vht),
1463                                              *offset);
1464                 if (end - pos < noffset - *offset)
1465                         goto out_err;
1466                 memcpy(pos, ie + *offset, noffset - *offset);
1467                 pos += noffset - *offset;
1468                 *offset = noffset;
1469         }
1470
1471         /* Check if any channel in this sband supports at least 80 MHz */
1472         for (i = 0; i < sband->n_channels; i++) {
1473                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1474                                                 IEEE80211_CHAN_NO_80MHZ))
1475                         continue;
1476
1477                 have_80mhz = true;
1478                 break;
1479         }
1480
1481         if (sband->vht_cap.vht_supported && have_80mhz) {
1482                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1483                         goto out_err;
1484                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1485                                                  sband->vht_cap.cap);
1486         }
1487
1488         return pos - buffer;
1489  out_err:
1490         WARN_ONCE(1, "not enough space for preq IEs\n");
1491         return pos - buffer;
1492 }
1493
1494 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1495                              size_t buffer_len,
1496                              struct ieee80211_scan_ies *ie_desc,
1497                              const u8 *ie, size_t ie_len,
1498                              u8 bands_used, u32 *rate_masks,
1499                              struct cfg80211_chan_def *chandef)
1500 {
1501         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1502         int i;
1503
1504         memset(ie_desc, 0, sizeof(*ie_desc));
1505
1506         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1507                 if (bands_used & BIT(i)) {
1508                         pos += ieee80211_build_preq_ies_band(local,
1509                                                              buffer + pos,
1510                                                              buffer_len - pos,
1511                                                              ie, ie_len, i,
1512                                                              rate_masks[i],
1513                                                              chandef,
1514                                                              &custom_ie_offset);
1515                         ie_desc->ies[i] = buffer + old_pos;
1516                         ie_desc->len[i] = pos - old_pos;
1517                         old_pos = pos;
1518                 }
1519         }
1520
1521         /* add any remaining custom IEs */
1522         if (ie && ie_len) {
1523                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1524                               "not enough space for preq custom IEs\n"))
1525                         return pos;
1526                 memcpy(buffer + pos, ie + custom_ie_offset,
1527                        ie_len - custom_ie_offset);
1528                 ie_desc->common_ies = buffer + pos;
1529                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1530                 pos += ie_len - custom_ie_offset;
1531         }
1532
1533         return pos;
1534 };
1535
1536 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1537                                           const u8 *src, const u8 *dst,
1538                                           u32 ratemask,
1539                                           struct ieee80211_channel *chan,
1540                                           const u8 *ssid, size_t ssid_len,
1541                                           const u8 *ie, size_t ie_len,
1542                                           bool directed)
1543 {
1544         struct ieee80211_local *local = sdata->local;
1545         struct cfg80211_chan_def chandef;
1546         struct sk_buff *skb;
1547         struct ieee80211_mgmt *mgmt;
1548         int ies_len;
1549         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1550         struct ieee80211_scan_ies dummy_ie_desc;
1551
1552         /*
1553          * Do not send DS Channel parameter for directed probe requests
1554          * in order to maximize the chance that we get a response.  Some
1555          * badly-behaved APs don't respond when this parameter is included.
1556          */
1557         chandef.width = sdata->vif.bss_conf.chandef.width;
1558         if (directed)
1559                 chandef.chan = NULL;
1560         else
1561                 chandef.chan = chan;
1562
1563         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1564                                      100 + ie_len);
1565         if (!skb)
1566                 return NULL;
1567
1568         rate_masks[chan->band] = ratemask;
1569         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1570                                            skb_tailroom(skb), &dummy_ie_desc,
1571                                            ie, ie_len, BIT(chan->band),
1572                                            rate_masks, &chandef);
1573         skb_put(skb, ies_len);
1574
1575         if (dst) {
1576                 mgmt = (struct ieee80211_mgmt *) skb->data;
1577                 memcpy(mgmt->da, dst, ETH_ALEN);
1578                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1579         }
1580
1581         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1582
1583         return skb;
1584 }
1585
1586 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1587                               const u8 *src, const u8 *dst,
1588                               const u8 *ssid, size_t ssid_len,
1589                               const u8 *ie, size_t ie_len,
1590                               u32 ratemask, bool directed, u32 tx_flags,
1591                               struct ieee80211_channel *channel, bool scan)
1592 {
1593         struct sk_buff *skb;
1594
1595         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1596                                         ssid, ssid_len,
1597                                         ie, ie_len, directed);
1598         if (skb) {
1599                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1600                 if (scan)
1601                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1602                 else
1603                         ieee80211_tx_skb(sdata, skb);
1604         }
1605 }
1606
1607 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1608                             struct ieee802_11_elems *elems,
1609                             enum ieee80211_band band, u32 *basic_rates)
1610 {
1611         struct ieee80211_supported_band *sband;
1612         size_t num_rates;
1613         u32 supp_rates, rate_flags;
1614         int i, j, shift;
1615         sband = sdata->local->hw.wiphy->bands[band];
1616
1617         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1618         shift = ieee80211_vif_get_shift(&sdata->vif);
1619
1620         if (WARN_ON(!sband))
1621                 return 1;
1622
1623         num_rates = sband->n_bitrates;
1624         supp_rates = 0;
1625         for (i = 0; i < elems->supp_rates_len +
1626                      elems->ext_supp_rates_len; i++) {
1627                 u8 rate = 0;
1628                 int own_rate;
1629                 bool is_basic;
1630                 if (i < elems->supp_rates_len)
1631                         rate = elems->supp_rates[i];
1632                 else if (elems->ext_supp_rates)
1633                         rate = elems->ext_supp_rates
1634                                 [i - elems->supp_rates_len];
1635                 own_rate = 5 * (rate & 0x7f);
1636                 is_basic = !!(rate & 0x80);
1637
1638                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1639                         continue;
1640
1641                 for (j = 0; j < num_rates; j++) {
1642                         int brate;
1643                         if ((rate_flags & sband->bitrates[j].flags)
1644                             != rate_flags)
1645                                 continue;
1646
1647                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1648                                              1 << shift);
1649
1650                         if (brate == own_rate) {
1651                                 supp_rates |= BIT(j);
1652                                 if (basic_rates && is_basic)
1653                                         *basic_rates |= BIT(j);
1654                         }
1655                 }
1656         }
1657         return supp_rates;
1658 }
1659
1660 void ieee80211_stop_device(struct ieee80211_local *local)
1661 {
1662         ieee80211_led_radio(local, false);
1663         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1664
1665         cancel_work_sync(&local->reconfig_filter);
1666
1667         flush_workqueue(local->workqueue);
1668         drv_stop(local);
1669 }
1670
1671 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1672 {
1673         struct ieee80211_sub_if_data *sdata;
1674         struct ieee80211_chanctx *ctx;
1675
1676         /*
1677          * We get here if during resume the device can't be restarted properly.
1678          * We might also get here if this happens during HW reset, which is a
1679          * slightly different situation and we need to drop all connections in
1680          * the latter case.
1681          *
1682          * Ask cfg80211 to turn off all interfaces, this will result in more
1683          * warnings but at least we'll then get into a clean stopped state.
1684          */
1685
1686         local->resuming = false;
1687         local->suspended = false;
1688         local->started = false;
1689
1690         /* scheduled scan clearly can't be running any more, but tell
1691          * cfg80211 and clear local state
1692          */
1693         ieee80211_sched_scan_end(local);
1694
1695         list_for_each_entry(sdata, &local->interfaces, list)
1696                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1697
1698         /* Mark channel contexts as not being in the driver any more to avoid
1699          * removing them from the driver during the shutdown process...
1700          */
1701         mutex_lock(&local->chanctx_mtx);
1702         list_for_each_entry(ctx, &local->chanctx_list, list)
1703                 ctx->driver_present = false;
1704         mutex_unlock(&local->chanctx_mtx);
1705
1706         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1707 }
1708
1709 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1710                                      struct ieee80211_sub_if_data *sdata)
1711 {
1712         struct ieee80211_chanctx_conf *conf;
1713         struct ieee80211_chanctx *ctx;
1714
1715         if (!local->use_chanctx)
1716                 return;
1717
1718         mutex_lock(&local->chanctx_mtx);
1719         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1720                                          lockdep_is_held(&local->chanctx_mtx));
1721         if (conf) {
1722                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1723                 drv_assign_vif_chanctx(local, sdata, ctx);
1724         }
1725         mutex_unlock(&local->chanctx_mtx);
1726 }
1727
1728 int ieee80211_reconfig(struct ieee80211_local *local)
1729 {
1730         struct ieee80211_hw *hw = &local->hw;
1731         struct ieee80211_sub_if_data *sdata;
1732         struct ieee80211_chanctx *ctx;
1733         struct sta_info *sta;
1734         int res, i;
1735         bool reconfig_due_to_wowlan = false;
1736         struct ieee80211_sub_if_data *sched_scan_sdata;
1737         struct cfg80211_sched_scan_request *sched_scan_req;
1738         bool sched_scan_stopped = false;
1739
1740         /* nothing to do if HW shouldn't run */
1741         if (!local->open_count)
1742                 goto wake_up;
1743
1744 #ifdef CONFIG_PM
1745         if (local->suspended)
1746                 local->resuming = true;
1747
1748         if (local->wowlan) {
1749                 res = drv_resume(local);
1750                 local->wowlan = false;
1751                 if (res < 0) {
1752                         local->resuming = false;
1753                         return res;
1754                 }
1755                 if (res == 0)
1756                         goto wake_up;
1757                 WARN_ON(res > 1);
1758                 /*
1759                  * res is 1, which means the driver requested
1760                  * to go through a regular reset on wakeup.
1761                  */
1762                 reconfig_due_to_wowlan = true;
1763         }
1764 #endif
1765
1766         /*
1767          * Upon resume hardware can sometimes be goofy due to
1768          * various platform / driver / bus issues, so restarting
1769          * the device may at times not work immediately. Propagate
1770          * the error.
1771          */
1772         res = drv_start(local);
1773         if (res) {
1774                 if (local->suspended)
1775                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1776                 else
1777                         WARN(1, "Hardware became unavailable during restart.\n");
1778                 ieee80211_handle_reconfig_failure(local);
1779                 return res;
1780         }
1781
1782         /* setup fragmentation threshold */
1783         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1784
1785         /* setup RTS threshold */
1786         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1787
1788         /* reset coverage class */
1789         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1790
1791         ieee80211_led_radio(local, true);
1792         ieee80211_mod_tpt_led_trig(local,
1793                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1794
1795         /* add interfaces */
1796         sdata = rtnl_dereference(local->monitor_sdata);
1797         if (sdata) {
1798                 /* in HW restart it exists already */
1799                 WARN_ON(local->resuming);
1800                 res = drv_add_interface(local, sdata);
1801                 if (WARN_ON(res)) {
1802                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1803                         synchronize_net();
1804                         kfree(sdata);
1805                 }
1806         }
1807
1808         list_for_each_entry(sdata, &local->interfaces, list) {
1809                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1810                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1811                     ieee80211_sdata_running(sdata))
1812                         res = drv_add_interface(local, sdata);
1813         }
1814
1815         /* add channel contexts */
1816         if (local->use_chanctx) {
1817                 mutex_lock(&local->chanctx_mtx);
1818                 list_for_each_entry(ctx, &local->chanctx_list, list)
1819                         if (ctx->replace_state !=
1820                             IEEE80211_CHANCTX_REPLACES_OTHER)
1821                                 WARN_ON(drv_add_chanctx(local, ctx));
1822                 mutex_unlock(&local->chanctx_mtx);
1823
1824                 list_for_each_entry(sdata, &local->interfaces, list) {
1825                         if (!ieee80211_sdata_running(sdata))
1826                                 continue;
1827                         ieee80211_assign_chanctx(local, sdata);
1828                 }
1829
1830                 sdata = rtnl_dereference(local->monitor_sdata);
1831                 if (sdata && ieee80211_sdata_running(sdata))
1832                         ieee80211_assign_chanctx(local, sdata);
1833         }
1834
1835         /* add STAs back */
1836         mutex_lock(&local->sta_mtx);
1837         list_for_each_entry(sta, &local->sta_list, list) {
1838                 enum ieee80211_sta_state state;
1839
1840                 if (!sta->uploaded)
1841                         continue;
1842
1843                 /* AP-mode stations will be added later */
1844                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1845                         continue;
1846
1847                 for (state = IEEE80211_STA_NOTEXIST;
1848                      state < sta->sta_state; state++)
1849                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1850                                               state + 1));
1851         }
1852         mutex_unlock(&local->sta_mtx);
1853
1854         /* reconfigure tx conf */
1855         if (hw->queues >= IEEE80211_NUM_ACS) {
1856                 list_for_each_entry(sdata, &local->interfaces, list) {
1857                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1858                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1859                             !ieee80211_sdata_running(sdata))
1860                                 continue;
1861
1862                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1863                                 drv_conf_tx(local, sdata, i,
1864                                             &sdata->tx_conf[i]);
1865                 }
1866         }
1867
1868         /* reconfigure hardware */
1869         ieee80211_hw_config(local, ~0);
1870
1871         ieee80211_configure_filter(local);
1872
1873         /* Finally also reconfigure all the BSS information */
1874         list_for_each_entry(sdata, &local->interfaces, list) {
1875                 u32 changed;
1876
1877                 if (!ieee80211_sdata_running(sdata))
1878                         continue;
1879
1880                 /* common change flags for all interface types */
1881                 changed = BSS_CHANGED_ERP_CTS_PROT |
1882                           BSS_CHANGED_ERP_PREAMBLE |
1883                           BSS_CHANGED_ERP_SLOT |
1884                           BSS_CHANGED_HT |
1885                           BSS_CHANGED_BASIC_RATES |
1886                           BSS_CHANGED_BEACON_INT |
1887                           BSS_CHANGED_BSSID |
1888                           BSS_CHANGED_CQM |
1889                           BSS_CHANGED_QOS |
1890                           BSS_CHANGED_IDLE |
1891                           BSS_CHANGED_TXPOWER;
1892
1893                 switch (sdata->vif.type) {
1894                 case NL80211_IFTYPE_STATION:
1895                         changed |= BSS_CHANGED_ASSOC |
1896                                    BSS_CHANGED_ARP_FILTER |
1897                                    BSS_CHANGED_PS;
1898
1899                         /* Re-send beacon info report to the driver */
1900                         if (sdata->u.mgd.have_beacon)
1901                                 changed |= BSS_CHANGED_BEACON_INFO;
1902
1903                         sdata_lock(sdata);
1904                         ieee80211_bss_info_change_notify(sdata, changed);
1905                         sdata_unlock(sdata);
1906                         break;
1907                 case NL80211_IFTYPE_OCB:
1908                         changed |= BSS_CHANGED_OCB;
1909                         ieee80211_bss_info_change_notify(sdata, changed);
1910                         break;
1911                 case NL80211_IFTYPE_ADHOC:
1912                         changed |= BSS_CHANGED_IBSS;
1913                         /* fall through */
1914                 case NL80211_IFTYPE_AP:
1915                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1916
1917                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1918                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1919
1920                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1921                                         drv_start_ap(local, sdata);
1922                         }
1923
1924                         /* fall through */
1925                 case NL80211_IFTYPE_MESH_POINT:
1926                         if (sdata->vif.bss_conf.enable_beacon) {
1927                                 changed |= BSS_CHANGED_BEACON |
1928                                            BSS_CHANGED_BEACON_ENABLED;
1929                                 ieee80211_bss_info_change_notify(sdata, changed);
1930                         }
1931                         break;
1932                 case NL80211_IFTYPE_WDS:
1933                 case NL80211_IFTYPE_AP_VLAN:
1934                 case NL80211_IFTYPE_MONITOR:
1935                 case NL80211_IFTYPE_P2P_DEVICE:
1936                         /* nothing to do */
1937                         break;
1938                 case NL80211_IFTYPE_UNSPECIFIED:
1939                 case NUM_NL80211_IFTYPES:
1940                 case NL80211_IFTYPE_P2P_CLIENT:
1941                 case NL80211_IFTYPE_P2P_GO:
1942                         WARN_ON(1);
1943                         break;
1944                 }
1945         }
1946
1947         ieee80211_recalc_ps(local, -1);
1948
1949         /*
1950          * The sta might be in psm against the ap (e.g. because
1951          * this was the state before a hw restart), so we
1952          * explicitly send a null packet in order to make sure
1953          * it'll sync against the ap (and get out of psm).
1954          */
1955         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1956                 list_for_each_entry(sdata, &local->interfaces, list) {
1957                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1958                                 continue;
1959                         if (!sdata->u.mgd.associated)
1960                                 continue;
1961
1962                         ieee80211_send_nullfunc(local, sdata, 0);
1963                 }
1964         }
1965
1966         /* APs are now beaconing, add back stations */
1967         mutex_lock(&local->sta_mtx);
1968         list_for_each_entry(sta, &local->sta_list, list) {
1969                 enum ieee80211_sta_state state;
1970
1971                 if (!sta->uploaded)
1972                         continue;
1973
1974                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1975                         continue;
1976
1977                 for (state = IEEE80211_STA_NOTEXIST;
1978                      state < sta->sta_state; state++)
1979                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1980                                               state + 1));
1981         }
1982         mutex_unlock(&local->sta_mtx);
1983
1984         /* add back keys */
1985         list_for_each_entry(sdata, &local->interfaces, list)
1986                 if (ieee80211_sdata_running(sdata))
1987                         ieee80211_enable_keys(sdata);
1988
1989  wake_up:
1990         local->in_reconfig = false;
1991         barrier();
1992
1993         if (local->monitors == local->open_count && local->monitors > 0)
1994                 ieee80211_add_virtual_monitor(local);
1995
1996         /*
1997          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1998          * sessions can be established after a resume.
1999          *
2000          * Also tear down aggregation sessions since reconfiguring
2001          * them in a hardware restart scenario is not easily done
2002          * right now, and the hardware will have lost information
2003          * about the sessions, but we and the AP still think they
2004          * are active. This is really a workaround though.
2005          */
2006         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2007                 mutex_lock(&local->sta_mtx);
2008
2009                 list_for_each_entry(sta, &local->sta_list, list) {
2010                         ieee80211_sta_tear_down_BA_sessions(
2011                                         sta, AGG_STOP_LOCAL_REQUEST);
2012                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2013                 }
2014
2015                 mutex_unlock(&local->sta_mtx);
2016         }
2017
2018         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2019                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2020                                         false);
2021
2022         /*
2023          * Reconfigure sched scan if it was interrupted by FW restart or
2024          * suspend.
2025          */
2026         mutex_lock(&local->mtx);
2027         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2028                                                 lockdep_is_held(&local->mtx));
2029         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2030                                                 lockdep_is_held(&local->mtx));
2031         if (sched_scan_sdata && sched_scan_req)
2032                 /*
2033                  * Sched scan stopped, but we don't want to report it. Instead,
2034                  * we're trying to reschedule.
2035                  */
2036                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2037                                                          sched_scan_req))
2038                         sched_scan_stopped = true;
2039         mutex_unlock(&local->mtx);
2040
2041         if (sched_scan_stopped)
2042                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2043
2044         /*
2045          * If this is for hw restart things are still running.
2046          * We may want to change that later, however.
2047          */
2048         if (local->open_count && (!local->suspended || reconfig_due_to_wowlan))
2049                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2050
2051         if (!local->suspended)
2052                 return 0;
2053
2054 #ifdef CONFIG_PM
2055         /* first set suspended false, then resuming */
2056         local->suspended = false;
2057         mb();
2058         local->resuming = false;
2059
2060         if (local->open_count && !reconfig_due_to_wowlan)
2061                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2062
2063         list_for_each_entry(sdata, &local->interfaces, list) {
2064                 if (!ieee80211_sdata_running(sdata))
2065                         continue;
2066                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2067                         ieee80211_sta_restart(sdata);
2068         }
2069
2070         mod_timer(&local->sta_cleanup, jiffies + 1);
2071 #else
2072         WARN_ON(1);
2073 #endif
2074
2075         return 0;
2076 }
2077
2078 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2079 {
2080         struct ieee80211_sub_if_data *sdata;
2081         struct ieee80211_local *local;
2082         struct ieee80211_key *key;
2083
2084         if (WARN_ON(!vif))
2085                 return;
2086
2087         sdata = vif_to_sdata(vif);
2088         local = sdata->local;
2089
2090         if (WARN_ON(!local->resuming))
2091                 return;
2092
2093         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2094                 return;
2095
2096         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2097
2098         mutex_lock(&local->key_mtx);
2099         list_for_each_entry(key, &sdata->key_list, list)
2100                 key->flags |= KEY_FLAG_TAINTED;
2101         mutex_unlock(&local->key_mtx);
2102 }
2103 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2104
2105 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2106 {
2107         struct ieee80211_local *local = sdata->local;
2108         struct ieee80211_chanctx_conf *chanctx_conf;
2109         struct ieee80211_chanctx *chanctx;
2110
2111         mutex_lock(&local->chanctx_mtx);
2112
2113         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2114                                         lockdep_is_held(&local->chanctx_mtx));
2115
2116         if (WARN_ON_ONCE(!chanctx_conf))
2117                 goto unlock;
2118
2119         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2120         ieee80211_recalc_smps_chanctx(local, chanctx);
2121  unlock:
2122         mutex_unlock(&local->chanctx_mtx);
2123 }
2124
2125 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2126 {
2127         struct ieee80211_local *local = sdata->local;
2128         struct ieee80211_chanctx_conf *chanctx_conf;
2129         struct ieee80211_chanctx *chanctx;
2130
2131         mutex_lock(&local->chanctx_mtx);
2132
2133         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2134                                         lockdep_is_held(&local->chanctx_mtx));
2135
2136         if (WARN_ON_ONCE(!chanctx_conf))
2137                 goto unlock;
2138
2139         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2140         ieee80211_recalc_chanctx_min_def(local, chanctx);
2141  unlock:
2142         mutex_unlock(&local->chanctx_mtx);
2143 }
2144
2145 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2146 {
2147         int i;
2148
2149         for (i = 0; i < n_ids; i++)
2150                 if (ids[i] == id)
2151                         return true;
2152         return false;
2153 }
2154
2155 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2156                               const u8 *ids, int n_ids,
2157                               const u8 *after_ric, int n_after_ric,
2158                               size_t offset)
2159 {
2160         size_t pos = offset;
2161
2162         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2163                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2164                         pos += 2 + ies[pos + 1];
2165
2166                         while (pos < ielen &&
2167                                !ieee80211_id_in_list(after_ric, n_after_ric,
2168                                                      ies[pos]))
2169                                 pos += 2 + ies[pos + 1];
2170                 } else {
2171                         pos += 2 + ies[pos + 1];
2172                 }
2173         }
2174
2175         return pos;
2176 }
2177
2178 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2179                           const u8 *ids, int n_ids, size_t offset)
2180 {
2181         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2182 }
2183 EXPORT_SYMBOL(ieee80211_ie_split);
2184
2185 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2186 {
2187         size_t pos = offset;
2188
2189         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2190                 pos += 2 + ies[pos + 1];
2191
2192         return pos;
2193 }
2194
2195 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2196                                             int rssi_min_thold,
2197                                             int rssi_max_thold)
2198 {
2199         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2200
2201         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2202                 return;
2203
2204         /*
2205          * Scale up threshold values before storing it, as the RSSI averaging
2206          * algorithm uses a scaled up value as well. Change this scaling
2207          * factor if the RSSI averaging algorithm changes.
2208          */
2209         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2210         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2211 }
2212
2213 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2214                                     int rssi_min_thold,
2215                                     int rssi_max_thold)
2216 {
2217         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2218
2219         WARN_ON(rssi_min_thold == rssi_max_thold ||
2220                 rssi_min_thold > rssi_max_thold);
2221
2222         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2223                                        rssi_max_thold);
2224 }
2225 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2226
2227 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2228 {
2229         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2230
2231         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2232 }
2233 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2234
2235 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2236                               u16 cap)
2237 {
2238         __le16 tmp;
2239
2240         *pos++ = WLAN_EID_HT_CAPABILITY;
2241         *pos++ = sizeof(struct ieee80211_ht_cap);
2242         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2243
2244         /* capability flags */
2245         tmp = cpu_to_le16(cap);
2246         memcpy(pos, &tmp, sizeof(u16));
2247         pos += sizeof(u16);
2248
2249         /* AMPDU parameters */
2250         *pos++ = ht_cap->ampdu_factor |
2251                  (ht_cap->ampdu_density <<
2252                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2253
2254         /* MCS set */
2255         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2256         pos += sizeof(ht_cap->mcs);
2257
2258         /* extended capabilities */
2259         pos += sizeof(__le16);
2260
2261         /* BF capabilities */
2262         pos += sizeof(__le32);
2263
2264         /* antenna selection */
2265         pos += sizeof(u8);
2266
2267         return pos;
2268 }
2269
2270 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2271                                u32 cap)
2272 {
2273         __le32 tmp;
2274
2275         *pos++ = WLAN_EID_VHT_CAPABILITY;
2276         *pos++ = sizeof(struct ieee80211_vht_cap);
2277         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2278
2279         /* capability flags */
2280         tmp = cpu_to_le32(cap);
2281         memcpy(pos, &tmp, sizeof(u32));
2282         pos += sizeof(u32);
2283
2284         /* VHT MCS set */
2285         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2286         pos += sizeof(vht_cap->vht_mcs);
2287
2288         return pos;
2289 }
2290
2291 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2292                                const struct cfg80211_chan_def *chandef,
2293                                u16 prot_mode)
2294 {
2295         struct ieee80211_ht_operation *ht_oper;
2296         /* Build HT Information */
2297         *pos++ = WLAN_EID_HT_OPERATION;
2298         *pos++ = sizeof(struct ieee80211_ht_operation);
2299         ht_oper = (struct ieee80211_ht_operation *)pos;
2300         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2301                                         chandef->chan->center_freq);
2302         switch (chandef->width) {
2303         case NL80211_CHAN_WIDTH_160:
2304         case NL80211_CHAN_WIDTH_80P80:
2305         case NL80211_CHAN_WIDTH_80:
2306         case NL80211_CHAN_WIDTH_40:
2307                 if (chandef->center_freq1 > chandef->chan->center_freq)
2308                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2309                 else
2310                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2311                 break;
2312         default:
2313                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2314                 break;
2315         }
2316         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2317             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2318             chandef->width != NL80211_CHAN_WIDTH_20)
2319                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2320
2321         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2322         ht_oper->stbc_param = 0x0000;
2323
2324         /* It seems that Basic MCS set and Supported MCS set
2325            are identical for the first 10 bytes */
2326         memset(&ht_oper->basic_set, 0, 16);
2327         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2328
2329         return pos + sizeof(struct ieee80211_ht_operation);
2330 }
2331
2332 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2333                                   const struct ieee80211_ht_operation *ht_oper,
2334                                   struct cfg80211_chan_def *chandef)
2335 {
2336         enum nl80211_channel_type channel_type;
2337
2338         if (!ht_oper) {
2339                 cfg80211_chandef_create(chandef, control_chan,
2340                                         NL80211_CHAN_NO_HT);
2341                 return;
2342         }
2343
2344         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2345         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2346                 channel_type = NL80211_CHAN_HT20;
2347                 break;
2348         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2349                 channel_type = NL80211_CHAN_HT40PLUS;
2350                 break;
2351         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2352                 channel_type = NL80211_CHAN_HT40MINUS;
2353                 break;
2354         default:
2355                 channel_type = NL80211_CHAN_NO_HT;
2356         }
2357
2358         cfg80211_chandef_create(chandef, control_chan, channel_type);
2359 }
2360
2361 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2362                              const struct ieee80211_supported_band *sband,
2363                              const u8 *srates, int srates_len, u32 *rates)
2364 {
2365         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2366         int shift = ieee80211_chandef_get_shift(chandef);
2367         struct ieee80211_rate *br;
2368         int brate, rate, i, j, count = 0;
2369
2370         *rates = 0;
2371
2372         for (i = 0; i < srates_len; i++) {
2373                 rate = srates[i] & 0x7f;
2374
2375                 for (j = 0; j < sband->n_bitrates; j++) {
2376                         br = &sband->bitrates[j];
2377                         if ((rate_flags & br->flags) != rate_flags)
2378                                 continue;
2379
2380                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2381                         if (brate == rate) {
2382                                 *rates |= BIT(j);
2383                                 count++;
2384                                 break;
2385                         }
2386                 }
2387         }
2388         return count;
2389 }
2390
2391 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2392                             struct sk_buff *skb, bool need_basic,
2393                             enum ieee80211_band band)
2394 {
2395         struct ieee80211_local *local = sdata->local;
2396         struct ieee80211_supported_band *sband;
2397         int rate, shift;
2398         u8 i, rates, *pos;
2399         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2400         u32 rate_flags;
2401
2402         shift = ieee80211_vif_get_shift(&sdata->vif);
2403         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2404         sband = local->hw.wiphy->bands[band];
2405         rates = 0;
2406         for (i = 0; i < sband->n_bitrates; i++) {
2407                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2408                         continue;
2409                 rates++;
2410         }
2411         if (rates > 8)
2412                 rates = 8;
2413
2414         if (skb_tailroom(skb) < rates + 2)
2415                 return -ENOMEM;
2416
2417         pos = skb_put(skb, rates + 2);
2418         *pos++ = WLAN_EID_SUPP_RATES;
2419         *pos++ = rates;
2420         for (i = 0; i < rates; i++) {
2421                 u8 basic = 0;
2422                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2423                         continue;
2424
2425                 if (need_basic && basic_rates & BIT(i))
2426                         basic = 0x80;
2427                 rate = sband->bitrates[i].bitrate;
2428                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2429                                     5 * (1 << shift));
2430                 *pos++ = basic | (u8) rate;
2431         }
2432
2433         return 0;
2434 }
2435
2436 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2437                                 struct sk_buff *skb, bool need_basic,
2438                                 enum ieee80211_band band)
2439 {
2440         struct ieee80211_local *local = sdata->local;
2441         struct ieee80211_supported_band *sband;
2442         int rate, shift;
2443         u8 i, exrates, *pos;
2444         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2445         u32 rate_flags;
2446
2447         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2448         shift = ieee80211_vif_get_shift(&sdata->vif);
2449
2450         sband = local->hw.wiphy->bands[band];
2451         exrates = 0;
2452         for (i = 0; i < sband->n_bitrates; i++) {
2453                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2454                         continue;
2455                 exrates++;
2456         }
2457
2458         if (exrates > 8)
2459                 exrates -= 8;
2460         else
2461                 exrates = 0;
2462
2463         if (skb_tailroom(skb) < exrates + 2)
2464                 return -ENOMEM;
2465
2466         if (exrates) {
2467                 pos = skb_put(skb, exrates + 2);
2468                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2469                 *pos++ = exrates;
2470                 for (i = 8; i < sband->n_bitrates; i++) {
2471                         u8 basic = 0;
2472                         if ((rate_flags & sband->bitrates[i].flags)
2473                             != rate_flags)
2474                                 continue;
2475                         if (need_basic && basic_rates & BIT(i))
2476                                 basic = 0x80;
2477                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2478                                             5 * (1 << shift));
2479                         *pos++ = basic | (u8) rate;
2480                 }
2481         }
2482         return 0;
2483 }
2484
2485 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2486 {
2487         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2488         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2489
2490         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2491                 /* non-managed type inferfaces */
2492                 return 0;
2493         }
2494         return ifmgd->ave_beacon_signal / 16;
2495 }
2496 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2497
2498 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2499 {
2500         if (!mcs)
2501                 return 1;
2502
2503         /* TODO: consider rx_highest */
2504
2505         if (mcs->rx_mask[3])
2506                 return 4;
2507         if (mcs->rx_mask[2])
2508                 return 3;
2509         if (mcs->rx_mask[1])
2510                 return 2;
2511         return 1;
2512 }
2513
2514 /**
2515  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2516  * @local: mac80211 hw info struct
2517  * @status: RX status
2518  * @mpdu_len: total MPDU length (including FCS)
2519  * @mpdu_offset: offset into MPDU to calculate timestamp at
2520  *
2521  * This function calculates the RX timestamp at the given MPDU offset, taking
2522  * into account what the RX timestamp was. An offset of 0 will just normalize
2523  * the timestamp to TSF at beginning of MPDU reception.
2524  */
2525 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2526                                      struct ieee80211_rx_status *status,
2527                                      unsigned int mpdu_len,
2528                                      unsigned int mpdu_offset)
2529 {
2530         u64 ts = status->mactime;
2531         struct rate_info ri;
2532         u16 rate;
2533
2534         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2535                 return 0;
2536
2537         memset(&ri, 0, sizeof(ri));
2538
2539         /* Fill cfg80211 rate info */
2540         if (status->flag & RX_FLAG_HT) {
2541                 ri.mcs = status->rate_idx;
2542                 ri.flags |= RATE_INFO_FLAGS_MCS;
2543                 if (status->flag & RX_FLAG_40MHZ)
2544                         ri.bw = RATE_INFO_BW_40;
2545                 else
2546                         ri.bw = RATE_INFO_BW_20;
2547                 if (status->flag & RX_FLAG_SHORT_GI)
2548                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2549         } else if (status->flag & RX_FLAG_VHT) {
2550                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2551                 ri.mcs = status->rate_idx;
2552                 ri.nss = status->vht_nss;
2553                 if (status->flag & RX_FLAG_40MHZ)
2554                         ri.bw = RATE_INFO_BW_40;
2555                 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2556                         ri.bw = RATE_INFO_BW_80;
2557                 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2558                         ri.bw = RATE_INFO_BW_160;
2559                 else
2560                         ri.bw = RATE_INFO_BW_20;
2561                 if (status->flag & RX_FLAG_SHORT_GI)
2562                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2563         } else {
2564                 struct ieee80211_supported_band *sband;
2565                 int shift = 0;
2566                 int bitrate;
2567
2568                 if (status->flag & RX_FLAG_10MHZ) {
2569                         shift = 1;
2570                         ri.bw = RATE_INFO_BW_10;
2571                 } else if (status->flag & RX_FLAG_5MHZ) {
2572                         shift = 2;
2573                         ri.bw = RATE_INFO_BW_5;
2574                 } else {
2575                         ri.bw = RATE_INFO_BW_20;
2576                 }
2577
2578                 sband = local->hw.wiphy->bands[status->band];
2579                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2580                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2581         }
2582
2583         rate = cfg80211_calculate_bitrate(&ri);
2584         if (WARN_ONCE(!rate,
2585                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2586                       status->flag, status->rate_idx, status->vht_nss))
2587                 return 0;
2588
2589         /* rewind from end of MPDU */
2590         if (status->flag & RX_FLAG_MACTIME_END)
2591                 ts -= mpdu_len * 8 * 10 / rate;
2592
2593         ts += mpdu_offset * 8 * 10 / rate;
2594
2595         return ts;
2596 }
2597
2598 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2599 {
2600         struct ieee80211_sub_if_data *sdata;
2601         struct cfg80211_chan_def chandef;
2602
2603         mutex_lock(&local->mtx);
2604         mutex_lock(&local->iflist_mtx);
2605         list_for_each_entry(sdata, &local->interfaces, list) {
2606                 /* it might be waiting for the local->mtx, but then
2607                  * by the time it gets it, sdata->wdev.cac_started
2608                  * will no longer be true
2609                  */
2610                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2611
2612                 if (sdata->wdev.cac_started) {
2613                         chandef = sdata->vif.bss_conf.chandef;
2614                         ieee80211_vif_release_channel(sdata);
2615                         cfg80211_cac_event(sdata->dev,
2616                                            &chandef,
2617                                            NL80211_RADAR_CAC_ABORTED,
2618                                            GFP_KERNEL);
2619                 }
2620         }
2621         mutex_unlock(&local->iflist_mtx);
2622         mutex_unlock(&local->mtx);
2623 }
2624
2625 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2626 {
2627         struct ieee80211_local *local =
2628                 container_of(work, struct ieee80211_local, radar_detected_work);
2629         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2630         struct ieee80211_chanctx *ctx;
2631         int num_chanctx = 0;
2632
2633         mutex_lock(&local->chanctx_mtx);
2634         list_for_each_entry(ctx, &local->chanctx_list, list) {
2635                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2636                         continue;
2637
2638                 num_chanctx++;
2639                 chandef = ctx->conf.def;
2640         }
2641         mutex_unlock(&local->chanctx_mtx);
2642
2643         ieee80211_dfs_cac_cancel(local);
2644
2645         if (num_chanctx > 1)
2646                 /* XXX: multi-channel is not supported yet */
2647                 WARN_ON(1);
2648         else
2649                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2650 }
2651
2652 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2653 {
2654         struct ieee80211_local *local = hw_to_local(hw);
2655
2656         trace_api_radar_detected(local);
2657
2658         ieee80211_queue_work(hw, &local->radar_detected_work);
2659 }
2660 EXPORT_SYMBOL(ieee80211_radar_detected);
2661
2662 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2663 {
2664         u32 ret;
2665         int tmp;
2666
2667         switch (c->width) {
2668         case NL80211_CHAN_WIDTH_20:
2669                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2670                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2671                 break;
2672         case NL80211_CHAN_WIDTH_40:
2673                 c->width = NL80211_CHAN_WIDTH_20;
2674                 c->center_freq1 = c->chan->center_freq;
2675                 ret = IEEE80211_STA_DISABLE_40MHZ |
2676                       IEEE80211_STA_DISABLE_VHT;
2677                 break;
2678         case NL80211_CHAN_WIDTH_80:
2679                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2680                 /* n_P40 */
2681                 tmp /= 2;
2682                 /* freq_P40 */
2683                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2684                 c->width = NL80211_CHAN_WIDTH_40;
2685                 ret = IEEE80211_STA_DISABLE_VHT;
2686                 break;
2687         case NL80211_CHAN_WIDTH_80P80:
2688                 c->center_freq2 = 0;
2689                 c->width = NL80211_CHAN_WIDTH_80;
2690                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2691                       IEEE80211_STA_DISABLE_160MHZ;
2692                 break;
2693         case NL80211_CHAN_WIDTH_160:
2694                 /* n_P20 */
2695                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2696                 /* n_P80 */
2697                 tmp /= 4;
2698                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2699                 c->width = NL80211_CHAN_WIDTH_80;
2700                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2701                       IEEE80211_STA_DISABLE_160MHZ;
2702                 break;
2703         default:
2704         case NL80211_CHAN_WIDTH_20_NOHT:
2705                 WARN_ON_ONCE(1);
2706                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2707                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2708                 break;
2709         case NL80211_CHAN_WIDTH_5:
2710         case NL80211_CHAN_WIDTH_10:
2711                 WARN_ON_ONCE(1);
2712                 /* keep c->width */
2713                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2714                 break;
2715         }
2716
2717         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2718
2719         return ret;
2720 }
2721
2722 /*
2723  * Returns true if smps_mode_new is strictly more restrictive than
2724  * smps_mode_old.
2725  */
2726 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2727                                    enum ieee80211_smps_mode smps_mode_new)
2728 {
2729         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2730                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2731                 return false;
2732
2733         switch (smps_mode_old) {
2734         case IEEE80211_SMPS_STATIC:
2735                 return false;
2736         case IEEE80211_SMPS_DYNAMIC:
2737                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2738         case IEEE80211_SMPS_OFF:
2739                 return smps_mode_new != IEEE80211_SMPS_OFF;
2740         default:
2741                 WARN_ON(1);
2742         }
2743
2744         return false;
2745 }
2746
2747 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2748                               struct cfg80211_csa_settings *csa_settings)
2749 {
2750         struct sk_buff *skb;
2751         struct ieee80211_mgmt *mgmt;
2752         struct ieee80211_local *local = sdata->local;
2753         int freq;
2754         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2755                                sizeof(mgmt->u.action.u.chan_switch);
2756         u8 *pos;
2757
2758         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2759             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2760                 return -EOPNOTSUPP;
2761
2762         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2763                             5 + /* channel switch announcement element */
2764                             3 + /* secondary channel offset element */
2765                             8); /* mesh channel switch parameters element */
2766         if (!skb)
2767                 return -ENOMEM;
2768
2769         skb_reserve(skb, local->tx_headroom);
2770         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2771         memset(mgmt, 0, hdr_len);
2772         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2773                                           IEEE80211_STYPE_ACTION);
2774
2775         eth_broadcast_addr(mgmt->da);
2776         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2777         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2778                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2779         } else {
2780                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2781                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2782         }
2783         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2784         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2785         pos = skb_put(skb, 5);
2786         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2787         *pos++ = 3;                                             /* IE length */
2788         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2789         freq = csa_settings->chandef.chan->center_freq;
2790         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2791         *pos++ = csa_settings->count;                           /* count */
2792
2793         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2794                 enum nl80211_channel_type ch_type;
2795
2796                 skb_put(skb, 3);
2797                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2798                 *pos++ = 1;                                     /* IE length */
2799                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2800                 if (ch_type == NL80211_CHAN_HT40PLUS)
2801                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2802                 else
2803                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2804         }
2805
2806         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2807                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2808
2809                 skb_put(skb, 8);
2810                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2811                 *pos++ = 6;                                     /* IE length */
2812                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2813                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2814                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2815                 *pos++ |= csa_settings->block_tx ?
2816                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2817                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2818                 pos += 2;
2819                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2820                 pos += 2;
2821         }
2822
2823         ieee80211_tx_skb(sdata, skb);
2824         return 0;
2825 }
2826
2827 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2828 {
2829         return !(cs == NULL || cs->cipher == 0 ||
2830                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2831                  cs->hdr_len <= cs->key_idx_off ||
2832                  cs->key_idx_shift > 7 ||
2833                  cs->key_idx_mask == 0);
2834 }
2835
2836 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2837 {
2838         int i;
2839
2840         /* Ensure we have enough iftype bitmap space for all iftype values */
2841         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2842
2843         for (i = 0; i < n; i++)
2844                 if (!ieee80211_cs_valid(&cs[i]))
2845                         return false;
2846
2847         return true;
2848 }
2849
2850 const struct ieee80211_cipher_scheme *
2851 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2852                  enum nl80211_iftype iftype)
2853 {
2854         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2855         int n = local->hw.n_cipher_schemes;
2856         int i;
2857         const struct ieee80211_cipher_scheme *cs = NULL;
2858
2859         for (i = 0; i < n; i++) {
2860                 if (l[i].cipher == cipher) {
2861                         cs = &l[i];
2862                         break;
2863                 }
2864         }
2865
2866         if (!cs || !(cs->iftype & BIT(iftype)))
2867                 return NULL;
2868
2869         return cs;
2870 }
2871
2872 int ieee80211_cs_headroom(struct ieee80211_local *local,
2873                           struct cfg80211_crypto_settings *crypto,
2874                           enum nl80211_iftype iftype)
2875 {
2876         const struct ieee80211_cipher_scheme *cs;
2877         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2878         int i;
2879
2880         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2881                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2882                                       iftype);
2883
2884                 if (cs && headroom < cs->hdr_len)
2885                         headroom = cs->hdr_len;
2886         }
2887
2888         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2889         if (cs && headroom < cs->hdr_len)
2890                 headroom = cs->hdr_len;
2891
2892         return headroom;
2893 }
2894
2895 static bool
2896 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2897 {
2898         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2899         int skip;
2900
2901         if (end > 0)
2902                 return false;
2903
2904         /* End time is in the past, check for repetitions */
2905         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2906         if (data->count[i] < 255) {
2907                 if (data->count[i] <= skip) {
2908                         data->count[i] = 0;
2909                         return false;
2910                 }
2911
2912                 data->count[i] -= skip;
2913         }
2914
2915         data->desc[i].start += skip * data->desc[i].interval;
2916
2917         return true;
2918 }
2919
2920 static bool
2921 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2922                              s32 *offset)
2923 {
2924         bool ret = false;
2925         int i;
2926
2927         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2928                 s32 cur;
2929
2930                 if (!data->count[i])
2931                         continue;
2932
2933                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2934                         ret = true;
2935
2936                 cur = data->desc[i].start - tsf;
2937                 if (cur > *offset)
2938                         continue;
2939
2940                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2941                 if (cur > *offset)
2942                         *offset = cur;
2943         }
2944
2945         return ret;
2946 }
2947
2948 static u32
2949 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2950 {
2951         s32 offset = 0;
2952         int tries = 0;
2953         /*
2954          * arbitrary limit, used to avoid infinite loops when combined NoA
2955          * descriptors cover the full time period.
2956          */
2957         int max_tries = 5;
2958
2959         ieee80211_extend_absent_time(data, tsf, &offset);
2960         do {
2961                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2962                         break;
2963
2964                 tries++;
2965         } while (tries < max_tries);
2966
2967         return offset;
2968 }
2969
2970 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2971 {
2972         u32 next_offset = BIT(31) - 1;
2973         int i;
2974
2975         data->absent = 0;
2976         data->has_next_tsf = false;
2977         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2978                 s32 start;
2979
2980                 if (!data->count[i])
2981                         continue;
2982
2983                 ieee80211_extend_noa_desc(data, tsf, i);
2984                 start = data->desc[i].start - tsf;
2985                 if (start <= 0)
2986                         data->absent |= BIT(i);
2987
2988                 if (next_offset > start)
2989                         next_offset = start;
2990
2991                 data->has_next_tsf = true;
2992         }
2993
2994         if (data->absent)
2995                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2996
2997         data->next_tsf = tsf + next_offset;
2998 }
2999 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3000
3001 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3002                             struct ieee80211_noa_data *data, u32 tsf)
3003 {
3004         int ret = 0;
3005         int i;
3006
3007         memset(data, 0, sizeof(*data));
3008
3009         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3010                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3011
3012                 if (!desc->count || !desc->duration)
3013                         continue;
3014
3015                 data->count[i] = desc->count;
3016                 data->desc[i].start = le32_to_cpu(desc->start_time);
3017                 data->desc[i].duration = le32_to_cpu(desc->duration);
3018                 data->desc[i].interval = le32_to_cpu(desc->interval);
3019
3020                 if (data->count[i] > 1 &&
3021                     data->desc[i].interval < data->desc[i].duration)
3022                         continue;
3023
3024                 ieee80211_extend_noa_desc(data, tsf, i);
3025                 ret++;
3026         }
3027
3028         if (ret)
3029                 ieee80211_update_p2p_noa(data, tsf);
3030
3031         return ret;
3032 }
3033 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3034
3035 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3036                            struct ieee80211_sub_if_data *sdata)
3037 {
3038         u64 tsf = drv_get_tsf(local, sdata);
3039         u64 dtim_count = 0;
3040         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3041         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3042         struct ps_data *ps;
3043         u8 bcns_from_dtim;
3044
3045         if (tsf == -1ULL || !beacon_int || !dtim_period)
3046                 return;
3047
3048         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3049             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3050                 if (!sdata->bss)
3051                         return;
3052
3053                 ps = &sdata->bss->ps;
3054         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3055                 ps = &sdata->u.mesh.ps;
3056         } else {
3057                 return;
3058         }
3059
3060         /*
3061          * actually finds last dtim_count, mac80211 will update in
3062          * __beacon_add_tim().
3063          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3064          */
3065         do_div(tsf, beacon_int);
3066         bcns_from_dtim = do_div(tsf, dtim_period);
3067         /* just had a DTIM */
3068         if (!bcns_from_dtim)
3069                 dtim_count = 0;
3070         else
3071                 dtim_count = dtim_period - bcns_from_dtim;
3072
3073         ps->dtim_count = dtim_count;
3074 }
3075
3076 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3077                                          struct ieee80211_chanctx *ctx)
3078 {
3079         struct ieee80211_sub_if_data *sdata;
3080         u8 radar_detect = 0;
3081
3082         lockdep_assert_held(&local->chanctx_mtx);
3083
3084         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3085                 return 0;
3086
3087         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3088                 if (sdata->reserved_radar_required)
3089                         radar_detect |= BIT(sdata->reserved_chandef.width);
3090
3091         /*
3092          * An in-place reservation context should not have any assigned vifs
3093          * until it replaces the other context.
3094          */
3095         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3096                 !list_empty(&ctx->assigned_vifs));
3097
3098         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3099                 if (sdata->radar_required)
3100                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3101
3102         return radar_detect;
3103 }
3104
3105 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3106                                  const struct cfg80211_chan_def *chandef,
3107                                  enum ieee80211_chanctx_mode chanmode,
3108                                  u8 radar_detect)
3109 {
3110         struct ieee80211_local *local = sdata->local;
3111         struct ieee80211_sub_if_data *sdata_iter;
3112         enum nl80211_iftype iftype = sdata->wdev.iftype;
3113         int num[NUM_NL80211_IFTYPES];
3114         struct ieee80211_chanctx *ctx;
3115         int num_different_channels = 0;
3116         int total = 1;
3117
3118         lockdep_assert_held(&local->chanctx_mtx);
3119
3120         if (WARN_ON(hweight32(radar_detect) > 1))
3121                 return -EINVAL;
3122
3123         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3124                     !chandef->chan))
3125                 return -EINVAL;
3126
3127         if (chandef)
3128                 num_different_channels = 1;
3129
3130         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3131                 return -EINVAL;
3132
3133         /* Always allow software iftypes */
3134         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3135                 if (radar_detect)
3136                         return -EINVAL;
3137                 return 0;
3138         }
3139
3140         memset(num, 0, sizeof(num));
3141
3142         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3143                 num[iftype] = 1;
3144
3145         list_for_each_entry(ctx, &local->chanctx_list, list) {
3146                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3147                         continue;
3148                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3149                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3150                         num_different_channels++;
3151                         continue;
3152                 }
3153                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3154                     cfg80211_chandef_compatible(chandef,
3155                                                 &ctx->conf.def))
3156                         continue;
3157                 num_different_channels++;
3158         }
3159
3160         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3161                 struct wireless_dev *wdev_iter;
3162
3163                 wdev_iter = &sdata_iter->wdev;
3164
3165                 if (sdata_iter == sdata ||
3166                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3167                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3168                         continue;
3169
3170                 num[wdev_iter->iftype]++;
3171                 total++;
3172         }
3173
3174         if (total == 1 && !radar_detect)
3175                 return 0;
3176
3177         return cfg80211_check_combinations(local->hw.wiphy,
3178                                            num_different_channels,
3179                                            radar_detect, num);
3180 }
3181
3182 static void
3183 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3184                          void *data)
3185 {
3186         u32 *max_num_different_channels = data;
3187
3188         *max_num_different_channels = max(*max_num_different_channels,
3189                                           c->num_different_channels);
3190 }
3191
3192 int ieee80211_max_num_channels(struct ieee80211_local *local)
3193 {
3194         struct ieee80211_sub_if_data *sdata;
3195         int num[NUM_NL80211_IFTYPES] = {};
3196         struct ieee80211_chanctx *ctx;
3197         int num_different_channels = 0;
3198         u8 radar_detect = 0;
3199         u32 max_num_different_channels = 1;
3200         int err;
3201
3202         lockdep_assert_held(&local->chanctx_mtx);
3203
3204         list_for_each_entry(ctx, &local->chanctx_list, list) {
3205                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3206                         continue;
3207
3208                 num_different_channels++;
3209
3210                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3211         }
3212
3213         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3214                 num[sdata->wdev.iftype]++;
3215
3216         err = cfg80211_iter_combinations(local->hw.wiphy,
3217                                          num_different_channels, radar_detect,
3218                                          num, ieee80211_iter_max_chans,
3219                                          &max_num_different_channels);
3220         if (err < 0)
3221                 return err;
3222
3223         return max_num_different_channels;
3224 }
3225
3226 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3227 {
3228         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3229         *buf++ = 7; /* len */
3230         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3231         *buf++ = 0x50;
3232         *buf++ = 0xf2;
3233         *buf++ = 2; /* WME */
3234         *buf++ = 0; /* WME info */
3235         *buf++ = 1; /* WME ver */
3236         *buf++ = qosinfo; /* U-APSD no in use */
3237
3238         return buf;
3239 }