net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * utilities for mac80211
  13  */
  14
  15 #include <net/mac80211.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/export.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/bitmap.h>
  24 #include <linux/crc32.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/rtnetlink.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43         BUG_ON(!wiphy);
  44
  45         local = wiphy_priv(wiphy);
  46         return &local->hw;
  47 }
  48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  49
  50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  51                         enum nl80211_iftype type)
  52 {
  53         __le16 fc = hdr->frame_control;
  54
  55          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
  56         if (len < 16)
  57                 return NULL;
  58
  59         if (ieee80211_is_data(fc)) {
  60                 if (len < 24) /* drop incorrect hdr len (data) */
  61                         return NULL;
  62
  63                 if (ieee80211_has_a4(fc))
  64                         return NULL;
  65                 if (ieee80211_has_tods(fc))
  66                         return hdr->addr1;
  67                 if (ieee80211_has_fromds(fc))
  68                         return hdr->addr2;
  69
  70                 return hdr->addr3;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98
  99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 100 {
 101         struct sk_buff *skb;
 102         struct ieee80211_hdr *hdr;
 103
 104         skb_queue_walk(&tx->skbs, skb) {
 105                 hdr = (struct ieee80211_hdr *) skb->data;
 106                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 107         }
 108 }
 109
 110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
 111                              int rate, int erp, int short_preamble,
 112                              int shift)
 113 {
 114         int dur;
 115
 116         /* calculate duration (in microseconds, rounded up to next higher
 117          * integer if it includes a fractional microsecond) to send frame of
 118          * len bytes (does not include FCS) at the given rate. Duration will
 119          * also include SIFS.
 120          *
 121          * rate is in 100 kbps, so divident is multiplied by 10 in the
 122          * DIV_ROUND_UP() operations.
 123          *
 124          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 125          * is assumed to be 0 otherwise.
 126          */
 127
 128         if (band == IEEE80211_BAND_5GHZ || erp) {
 129                 /*
 130                  * OFDM:
 131                  *
 132                  * N_DBPS = DATARATE x 4
 133                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 134                  *      (16 = SIGNAL time, 6 = tail bits)
 135                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 136                  *
 137                  * T_SYM = 4 usec
 138                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 139                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 140                  *      signal ext = 6 usec
 141                  */
 142                 dur = 16; /* SIFS + signal ext */
 143                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 144                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 145
 146                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 147                  *  * times 4 for 5 MHz
 148                  *  * times 2 for 10 MHz
 149                  */
 150                 dur *= 1 << shift;
 151
 152                 /* rates should already consider the channel bandwidth,
 153                  * don't apply divisor again.
 154                  */
 155                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 156                                         4 * rate); /* T_SYM x N_SYM */
 157         } else {
 158                 /*
 159                  * 802.11b or 802.11g with 802.11b compatibility:
 160                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 161                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 162                  *
 163                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 164                  * aSIFSTime = 10 usec
 165                  * aPreambleLength = 144 usec or 72 usec with short preamble
 166                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 167                  */
 168                 dur = 10; /* aSIFSTime = 10 usec */
 169                 dur += short_preamble ? (72 + 24) : (144 + 48);
 170
 171                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 172         }
 173
 174         return dur;
 175 }
 176
 177 /* Exported duration function for driver use */
 178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 179                                         struct ieee80211_vif *vif,
 180                                         enum ieee80211_band band,
 181                                         size_t frame_len,
 182                                         struct ieee80211_rate *rate)
 183 {
 184         struct ieee80211_sub_if_data *sdata;
 185         u16 dur;
 186         int erp, shift = 0;
 187         bool short_preamble = false;
 188
 189         erp = 0;
 190         if (vif) {
 191                 sdata = vif_to_sdata(vif);
 192                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 193                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 194                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 195                 shift = ieee80211_vif_get_shift(vif);
 196         }
 197
 198         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 199                                        short_preamble, shift);
 200
 201         return cpu_to_le16(dur);
 202 }
 203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 204
 205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 206                               struct ieee80211_vif *vif, size_t frame_len,
 207                               const struct ieee80211_tx_info *frame_txctl)
 208 {
 209         struct ieee80211_local *local = hw_to_local(hw);
 210         struct ieee80211_rate *rate;
 211         struct ieee80211_sub_if_data *sdata;
 212         bool short_preamble;
 213         int erp, shift = 0, bitrate;
 214         u16 dur;
 215         struct ieee80211_supported_band *sband;
 216
 217         sband = local->hw.wiphy->bands[frame_txctl->band];
 218
 219         short_preamble = false;
 220
 221         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 222
 223         erp = 0;
 224         if (vif) {
 225                 sdata = vif_to_sdata(vif);
 226                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 227                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 228                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 229                 shift = ieee80211_vif_get_shift(vif);
 230         }
 231
 232         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 233
 234         /* CTS duration */
 235         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                        erp, short_preamble, shift);
 237         /* Data frame duration */
 238         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 239                                         erp, short_preamble, shift);
 240         /* ACK duration */
 241         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 242                                         erp, short_preamble, shift);
 243
 244         return cpu_to_le16(dur);
 245 }
 246 EXPORT_SYMBOL(ieee80211_rts_duration);
 247
 248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 249                                     struct ieee80211_vif *vif,
 250                                     size_t frame_len,
 251                                     const struct ieee80211_tx_info *frame_txctl)
 252 {
 253         struct ieee80211_local *local = hw_to_local(hw);
 254         struct ieee80211_rate *rate;
 255         struct ieee80211_sub_if_data *sdata;
 256         bool short_preamble;
 257         int erp, shift = 0, bitrate;
 258         u16 dur;
 259         struct ieee80211_supported_band *sband;
 260
 261         sband = local->hw.wiphy->bands[frame_txctl->band];
 262
 263         short_preamble = false;
 264
 265         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 266         erp = 0;
 267         if (vif) {
 268                 sdata = vif_to_sdata(vif);
 269                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 270                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 271                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 272                 shift = ieee80211_vif_get_shift(vif);
 273         }
 274
 275         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 276
 277         /* Data frame duration */
 278         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 279                                        erp, short_preamble, shift);
 280         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 281                 /* ACK duration */
 282                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 283                                                 erp, short_preamble, shift);
 284         }
 285
 286         return cpu_to_le16(dur);
 287 }
 288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 289
 290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 291 {
 292         struct ieee80211_sub_if_data *sdata;
 293         int n_acs = IEEE80211_NUM_ACS;
 294
 295         if (local->hw.queues < IEEE80211_NUM_ACS)
 296                 n_acs = 1;
 297
 298         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 299                 int ac;
 300
 301                 if (!sdata->dev)
 302                         continue;
 303
 304                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 305                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 306                         continue;
 307
 308                 for (ac = 0; ac < n_acs; ac++) {
 309                         int ac_queue = sdata->vif.hw_queue[ac];
 310
 311                         if (ac_queue == queue ||
 312                             (sdata->vif.cab_queue == queue &&
 313                              local->queue_stop_reasons[ac_queue] == 0 &&
 314                              skb_queue_empty(&local->pending[ac_queue])))
 315                                 netif_wake_subqueue(sdata->dev, ac);
 316                 }
 317         }
 318 }
 319
 320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 321                                    enum queue_stop_reason reason,
 322                                    bool refcounted)
 323 {
 324         struct ieee80211_local *local = hw_to_local(hw);
 325
 326         trace_wake_queue(local, queue, reason);
 327
 328         if (WARN_ON(queue >= hw->queues))
 329                 return;
 330
 331         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 332                 return;
 333
 334         if (!refcounted)
 335                 local->q_stop_reasons[queue][reason] = 0;
 336         else
 337                 local->q_stop_reasons[queue][reason]--;
 338
 339         if (local->q_stop_reasons[queue][reason] == 0)
 340                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 341
 342         if (local->queue_stop_reasons[queue] != 0)
 343                 /* someone still has this queue stopped */
 344                 return;
 345
 346         if (skb_queue_empty(&local->pending[queue])) {
 347                 rcu_read_lock();
 348                 ieee80211_propagate_queue_wake(local, queue);
 349                 rcu_read_unlock();
 350         } else
 351                 tasklet_schedule(&local->tx_pending_tasklet);
 352 }
 353
 354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 355                                     enum queue_stop_reason reason,
 356                                     bool refcounted)
 357 {
 358         struct ieee80211_local *local = hw_to_local(hw);
 359         unsigned long flags;
 360
 361         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 362         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 363         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 364 }
 365
 366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 367 {
 368         ieee80211_wake_queue_by_reason(hw, queue,
 369                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 370                                        false);
 371 }
 372 EXPORT_SYMBOL(ieee80211_wake_queue);
 373
 374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 375                                    enum queue_stop_reason reason,
 376                                    bool refcounted)
 377 {
 378         struct ieee80211_local *local = hw_to_local(hw);
 379         struct ieee80211_sub_if_data *sdata;
 380         int n_acs = IEEE80211_NUM_ACS;
 381
 382         trace_stop_queue(local, queue, reason);
 383
 384         if (WARN_ON(queue >= hw->queues))
 385                 return;
 386
 387         if (!refcounted)
 388                 local->q_stop_reasons[queue][reason] = 1;
 389         else
 390                 local->q_stop_reasons[queue][reason]++;
 391
 392         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (local->hw.queues < IEEE80211_NUM_ACS)
 396                 n_acs = 1;
 397
 398         rcu_read_lock();
 399         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 400                 int ac;
 401
 402                 if (!sdata->dev)
 403                         continue;
 404
 405                 for (ac = 0; ac < n_acs; ac++) {
 406                         if (sdata->vif.hw_queue[ac] == queue ||
 407                             sdata->vif.cab_queue == queue)
 408                                 netif_stop_subqueue(sdata->dev, ac);
 409                 }
 410         }
 411         rcu_read_unlock();
 412 }
 413
 414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 415                                     enum queue_stop_reason reason,
 416                                     bool refcounted)
 417 {
 418         struct ieee80211_local *local = hw_to_local(hw);
 419         unsigned long flags;
 420
 421         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 422         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 423         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 424 }
 425
 426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 427 {
 428         ieee80211_stop_queue_by_reason(hw, queue,
 429                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 430                                        false);
 431 }
 432 EXPORT_SYMBOL(ieee80211_stop_queue);
 433
 434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 435                                struct sk_buff *skb)
 436 {
 437         struct ieee80211_hw *hw = &local->hw;
 438         unsigned long flags;
 439         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 440         int queue = info->hw_queue;
 441
 442         if (WARN_ON(!info->control.vif)) {
 443                 ieee80211_free_txskb(&local->hw, skb);
 444                 return;
 445         }
 446
 447         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 448         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 449                                false);
 450         __skb_queue_tail(&local->pending[queue], skb);
 451         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 452                                false);
 453         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 454 }
 455
 456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 457                                 struct sk_buff_head *skbs)
 458 {
 459         struct ieee80211_hw *hw = &local->hw;
 460         struct sk_buff *skb;
 461         unsigned long flags;
 462         int queue, i;
 463
 464         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 465         while ((skb = skb_dequeue(skbs))) {
 466                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 467
 468                 if (WARN_ON(!info->control.vif)) {
 469                         ieee80211_free_txskb(&local->hw, skb);
 470                         continue;
 471                 }
 472
 473                 queue = info->hw_queue;
 474
 475                 __ieee80211_stop_queue(hw, queue,
 476                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 477                                 false);
 478
 479                 __skb_queue_tail(&local->pending[queue], skb);
 480         }
 481
 482         for (i = 0; i < hw->queues; i++)
 483                 __ieee80211_wake_queue(hw, i,
 484                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 485                         false);
 486         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 487 }
 488
 489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 490                                      unsigned long queues,
 491                                      enum queue_stop_reason reason,
 492                                      bool refcounted)
 493 {
 494         struct ieee80211_local *local = hw_to_local(hw);
 495         unsigned long flags;
 496         int i;
 497
 498         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 499
 500         for_each_set_bit(i, &queues, hw->queues)
 501                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 502
 503         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 504 }
 505
 506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 507 {
 508         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 509                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 510                                         false);
 511 }
 512 EXPORT_SYMBOL(ieee80211_stop_queues);
 513
 514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 515 {
 516         struct ieee80211_local *local = hw_to_local(hw);
 517         unsigned long flags;
 518         int ret;
 519
 520         if (WARN_ON(queue >= hw->queues))
 521                 return true;
 522
 523         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 524         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 525                        &local->queue_stop_reasons[queue]);
 526         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 527         return ret;
 528 }
 529 EXPORT_SYMBOL(ieee80211_queue_stopped);
 530
 531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 532                                      unsigned long queues,
 533                                      enum queue_stop_reason reason,
 534                                      bool refcounted)
 535 {
 536         struct ieee80211_local *local = hw_to_local(hw);
 537         unsigned long flags;
 538         int i;
 539
 540         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 541
 542         for_each_set_bit(i, &queues, hw->queues)
 543                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 544
 545         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 546 }
 547
 548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 549 {
 550         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 551                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 552                                         false);
 553 }
 554 EXPORT_SYMBOL(ieee80211_wake_queues);
 555
 556 static unsigned int
 557 ieee80211_get_vif_queues(struct ieee80211_local *local,
 558                          struct ieee80211_sub_if_data *sdata)
 559 {
 560         unsigned int queues;
 561
 562         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 563                 int ac;
 564
 565                 queues = 0;
 566
 567                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 568                         queues |= BIT(sdata->vif.hw_queue[ac]);
 569                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 570                         queues |= BIT(sdata->vif.cab_queue);
 571         } else {
 572                 /* all queues */
 573                 queues = BIT(local->hw.queues) - 1;
 574         }
 575
 576         return queues;
 577 }
 578
 579 void ieee80211_flush_queues(struct ieee80211_local *local,
 580                             struct ieee80211_sub_if_data *sdata)
 581 {
 582         unsigned int queues;
 583
 584         if (!local->ops->flush)
 585                 return;
 586
 587         queues = ieee80211_get_vif_queues(local, sdata);
 588
 589         ieee80211_stop_queues_by_reason(&local->hw, queues,
 590                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 591                                         false);
 592
 593         drv_flush(local, sdata, queues, false);
 594
 595         ieee80211_wake_queues_by_reason(&local->hw, queues,
 596                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 597                                         false);
 598 }
 599
 600 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 601                                struct ieee80211_sub_if_data *sdata,
 602                                enum queue_stop_reason reason)
 603 {
 604         ieee80211_stop_queues_by_reason(&local->hw,
 605                                         ieee80211_get_vif_queues(local, sdata),
 606                                         reason, true);
 607 }
 608
 609 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 610                                struct ieee80211_sub_if_data *sdata,
 611                                enum queue_stop_reason reason)
 612 {
 613         ieee80211_wake_queues_by_reason(&local->hw,
 614                                         ieee80211_get_vif_queues(local, sdata),
 615                                         reason, true);
 616 }
 617
 618 static void __iterate_active_interfaces(struct ieee80211_local *local,
 619                                         u32 iter_flags,
 620                                         void (*iterator)(void *data, u8 *mac,
 621                                                 struct ieee80211_vif *vif),
 622                                         void *data)
 623 {
 624         struct ieee80211_sub_if_data *sdata;
 625
 626         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 627                 switch (sdata->vif.type) {
 628                 case NL80211_IFTYPE_MONITOR:
 629                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 630                                 continue;
 631                         break;
 632                 case NL80211_IFTYPE_AP_VLAN:
 633                         continue;
 634                 default:
 635                         break;
 636                 }
 637                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 638                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 639                         continue;
 640                 if (ieee80211_sdata_running(sdata))
 641                         iterator(data, sdata->vif.addr,
 642                                  &sdata->vif);
 643         }
 644
 645         sdata = rcu_dereference_check(local->monitor_sdata,
 646                                       lockdep_is_held(&local->iflist_mtx) ||
 647                                       lockdep_rtnl_is_held());
 648         if (sdata &&
 649             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 650              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 651                 iterator(data, sdata->vif.addr, &sdata->vif);
 652 }
 653
 654 void ieee80211_iterate_active_interfaces(
 655         struct ieee80211_hw *hw, u32 iter_flags,
 656         void (*iterator)(void *data, u8 *mac,
 657                          struct ieee80211_vif *vif),
 658         void *data)
 659 {
 660         struct ieee80211_local *local = hw_to_local(hw);
 661
 662         mutex_lock(&local->iflist_mtx);
 663         __iterate_active_interfaces(local, iter_flags, iterator, data);
 664         mutex_unlock(&local->iflist_mtx);
 665 }
 666 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 667
 668 void ieee80211_iterate_active_interfaces_atomic(
 669         struct ieee80211_hw *hw, u32 iter_flags,
 670         void (*iterator)(void *data, u8 *mac,
 671                          struct ieee80211_vif *vif),
 672         void *data)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675
 676         rcu_read_lock();
 677         __iterate_active_interfaces(local, iter_flags, iterator, data);
 678         rcu_read_unlock();
 679 }
 680 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 681
 682 void ieee80211_iterate_active_interfaces_rtnl(
 683         struct ieee80211_hw *hw, u32 iter_flags,
 684         void (*iterator)(void *data, u8 *mac,
 685                          struct ieee80211_vif *vif),
 686         void *data)
 687 {
 688         struct ieee80211_local *local = hw_to_local(hw);
 689
 690         ASSERT_RTNL();
 691
 692         __iterate_active_interfaces(local, iter_flags, iterator, data);
 693 }
 694 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 695
 696 static void __iterate_stations(struct ieee80211_local *local,
 697                                void (*iterator)(void *data,
 698                                                 struct ieee80211_sta *sta),
 699                                void *data)
 700 {
 701         struct sta_info *sta;
 702
 703         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 704                 if (!sta->uploaded)
 705                         continue;
 706
 707                 iterator(data, &sta->sta);
 708         }
 709 }
 710
 711 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 712                         void (*iterator)(void *data,
 713                                          struct ieee80211_sta *sta),
 714                         void *data)
 715 {
 716         struct ieee80211_local *local = hw_to_local(hw);
 717
 718         rcu_read_lock();
 719         __iterate_stations(local, iterator, data);
 720         rcu_read_unlock();
 721 }
 722 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 723
 724 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 725 {
 726         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 727
 728         if (!ieee80211_sdata_running(sdata) ||
 729             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 730                 return NULL;
 731         return &sdata->vif;
 732 }
 733 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 734
 735 /*
 736  * Nothing should have been stuffed into the workqueue during
 737  * the suspend->resume cycle. If this WARN is seen then there
 738  * is a bug with either the driver suspend or something in
 739  * mac80211 stuffing into the workqueue which we haven't yet
 740  * cleared during mac80211's suspend cycle.
 741  */
 742 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 743 {
 744         if (WARN(local->suspended && !local->resuming,
 745                  "queueing ieee80211 work while going to suspend\n"))
 746                 return false;
 747
 748         return true;
 749 }
 750
 751 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 752 {
 753         struct ieee80211_local *local = hw_to_local(hw);
 754
 755         if (!ieee80211_can_queue_work(local))
 756                 return;
 757
 758         queue_work(local->workqueue, work);
 759 }
 760 EXPORT_SYMBOL(ieee80211_queue_work);
 761
 762 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 763                                   struct delayed_work *dwork,
 764                                   unsigned long delay)
 765 {
 766         struct ieee80211_local *local = hw_to_local(hw);
 767
 768         if (!ieee80211_can_queue_work(local))
 769                 return;
 770
 771         queue_delayed_work(local->workqueue, dwork, delay);
 772 }
 773 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 774
 775 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 776                                struct ieee802_11_elems *elems,
 777                                u64 filter, u32 crc)
 778 {
 779         size_t left = len;
 780         const u8 *pos = start;
 781         bool calc_crc = filter != 0;
 782         DECLARE_BITMAP(seen_elems, 256);
 783         const u8 *ie;
 784
 785         bitmap_zero(seen_elems, 256);
 786         memset(elems, 0, sizeof(*elems));
 787         elems->ie_start = start;
 788         elems->total_len = len;
 789
 790         while (left >= 2) {
 791                 u8 id, elen;
 792                 bool elem_parse_failed;
 793
 794                 id = *pos++;
 795                 elen = *pos++;
 796                 left -= 2;
 797
 798                 if (elen > left) {
 799                         elems->parse_error = true;
 800                         break;
 801                 }
 802
 803                 switch (id) {
 804                 case WLAN_EID_SSID:
 805                 case WLAN_EID_SUPP_RATES:
 806                 case WLAN_EID_FH_PARAMS:
 807                 case WLAN_EID_DS_PARAMS:
 808                 case WLAN_EID_CF_PARAMS:
 809                 case WLAN_EID_TIM:
 810                 case WLAN_EID_IBSS_PARAMS:
 811                 case WLAN_EID_CHALLENGE:
 812                 case WLAN_EID_RSN:
 813                 case WLAN_EID_ERP_INFO:
 814                 case WLAN_EID_EXT_SUPP_RATES:
 815                 case WLAN_EID_HT_CAPABILITY:
 816                 case WLAN_EID_HT_OPERATION:
 817                 case WLAN_EID_VHT_CAPABILITY:
 818                 case WLAN_EID_VHT_OPERATION:
 819                 case WLAN_EID_MESH_ID:
 820                 case WLAN_EID_MESH_CONFIG:
 821                 case WLAN_EID_PEER_MGMT:
 822                 case WLAN_EID_PREQ:
 823                 case WLAN_EID_PREP:
 824                 case WLAN_EID_PERR:
 825                 case WLAN_EID_RANN:
 826                 case WLAN_EID_CHANNEL_SWITCH:
 827                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 828                 case WLAN_EID_COUNTRY:
 829                 case WLAN_EID_PWR_CONSTRAINT:
 830                 case WLAN_EID_TIMEOUT_INTERVAL:
 831                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 832                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 833                 case WLAN_EID_CHAN_SWITCH_PARAM:
 834                 /*
 835                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 836                  * that if the content gets bigger it might be needed more than once
 837                  */
 838                         if (test_bit(id, seen_elems)) {
 839                                 elems->parse_error = true;
 840                                 left -= elen;
 841                                 pos += elen;
 842                                 continue;
 843                         }
 844                         break;
 845                 }
 846
 847                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 848                         crc = crc32_be(crc, pos - 2, elen + 2);
 849
 850                 elem_parse_failed = false;
 851
 852                 switch (id) {
 853                 case WLAN_EID_SSID:
 854                         elems->ssid = pos;
 855                         elems->ssid_len = elen;
 856                         break;
 857                 case WLAN_EID_SUPP_RATES:
 858                         elems->supp_rates = pos;
 859                         elems->supp_rates_len = elen;
 860                         break;
 861                 case WLAN_EID_DS_PARAMS:
 862                         if (elen >= 1)
 863                                 elems->ds_params = pos;
 864                         else
 865                                 elem_parse_failed = true;
 866                         break;
 867                 case WLAN_EID_TIM:
 868                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 869                                 elems->tim = (void *)pos;
 870                                 elems->tim_len = elen;
 871                         } else
 872                                 elem_parse_failed = true;
 873                         break;
 874                 case WLAN_EID_CHALLENGE:
 875                         elems->challenge = pos;
 876                         elems->challenge_len = elen;
 877                         break;
 878                 case WLAN_EID_VENDOR_SPECIFIC:
 879                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 880                             pos[2] == 0xf2) {
 881                                 /* Microsoft OUI (00:50:F2) */
 882
 883                                 if (calc_crc)
 884                                         crc = crc32_be(crc, pos - 2, elen + 2);
 885
 886                                 if (elen >= 5 && pos[3] == 2) {
 887                                         /* OUI Type 2 - WMM IE */
 888                                         if (pos[4] == 0) {
 889                                                 elems->wmm_info = pos;
 890                                                 elems->wmm_info_len = elen;
 891                                         } else if (pos[4] == 1) {
 892                                                 elems->wmm_param = pos;
 893                                                 elems->wmm_param_len = elen;
 894                                         }
 895                                 }
 896                         }
 897                         break;
 898                 case WLAN_EID_RSN:
 899                         elems->rsn = pos;
 900                         elems->rsn_len = elen;
 901                         break;
 902                 case WLAN_EID_ERP_INFO:
 903                         if (elen >= 1)
 904                                 elems->erp_info = pos;
 905                         else
 906                                 elem_parse_failed = true;
 907                         break;
 908                 case WLAN_EID_EXT_SUPP_RATES:
 909                         elems->ext_supp_rates = pos;
 910                         elems->ext_supp_rates_len = elen;
 911                         break;
 912                 case WLAN_EID_HT_CAPABILITY:
 913                         if (elen >= sizeof(struct ieee80211_ht_cap))
 914                                 elems->ht_cap_elem = (void *)pos;
 915                         else
 916                                 elem_parse_failed = true;
 917                         break;
 918                 case WLAN_EID_HT_OPERATION:
 919                         if (elen >= sizeof(struct ieee80211_ht_operation))
 920                                 elems->ht_operation = (void *)pos;
 921                         else
 922                                 elem_parse_failed = true;
 923                         break;
 924                 case WLAN_EID_VHT_CAPABILITY:
 925                         if (elen >= sizeof(struct ieee80211_vht_cap))
 926                                 elems->vht_cap_elem = (void *)pos;
 927                         else
 928                                 elem_parse_failed = true;
 929                         break;
 930                 case WLAN_EID_VHT_OPERATION:
 931                         if (elen >= sizeof(struct ieee80211_vht_operation))
 932                                 elems->vht_operation = (void *)pos;
 933                         else
 934                                 elem_parse_failed = true;
 935                         break;
 936                 case WLAN_EID_OPMODE_NOTIF:
 937                         if (elen > 0)
 938                                 elems->opmode_notif = pos;
 939                         else
 940                                 elem_parse_failed = true;
 941                         break;
 942                 case WLAN_EID_MESH_ID:
 943                         elems->mesh_id = pos;
 944                         elems->mesh_id_len = elen;
 945                         break;
 946                 case WLAN_EID_MESH_CONFIG:
 947                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 948                                 elems->mesh_config = (void *)pos;
 949                         else
 950                                 elem_parse_failed = true;
 951                         break;
 952                 case WLAN_EID_PEER_MGMT:
 953                         elems->peering = pos;
 954                         elems->peering_len = elen;
 955                         break;
 956                 case WLAN_EID_MESH_AWAKE_WINDOW:
 957                         if (elen >= 2)
 958                                 elems->awake_window = (void *)pos;
 959                         break;
 960                 case WLAN_EID_PREQ:
 961                         elems->preq = pos;
 962                         elems->preq_len = elen;
 963                         break;
 964                 case WLAN_EID_PREP:
 965                         elems->prep = pos;
 966                         elems->prep_len = elen;
 967                         break;
 968                 case WLAN_EID_PERR:
 969                         elems->perr = pos;
 970                         elems->perr_len = elen;
 971                         break;
 972                 case WLAN_EID_RANN:
 973                         if (elen >= sizeof(struct ieee80211_rann_ie))
 974                                 elems->rann = (void *)pos;
 975                         else
 976                                 elem_parse_failed = true;
 977                         break;
 978                 case WLAN_EID_CHANNEL_SWITCH:
 979                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
 980                                 elem_parse_failed = true;
 981                                 break;
 982                         }
 983                         elems->ch_switch_ie = (void *)pos;
 984                         break;
 985                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 986                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
 987                                 elem_parse_failed = true;
 988                                 break;
 989                         }
 990                         elems->ext_chansw_ie = (void *)pos;
 991                         break;
 992                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 993                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
 994                                 elem_parse_failed = true;
 995                                 break;
 996                         }
 997                         elems->sec_chan_offs = (void *)pos;
 998                         break;
 999                 case WLAN_EID_CHAN_SWITCH_PARAM:
1000                         if (elen !=
1001                             sizeof(*elems->mesh_chansw_params_ie)) {
1002                                 elem_parse_failed = true;
1003                                 break;
1004                         }
1005                         elems->mesh_chansw_params_ie = (void *)pos;
1006                         break;
1007                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1008                         if (!action ||
1009                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1010                                 elem_parse_failed = true;
1011                                 break;
1012                         }
1013                         elems->wide_bw_chansw_ie = (void *)pos;
1014                         break;
1015                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1016                         if (action) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         /*
1021                          * This is a bit tricky, but as we only care about
1022                          * the wide bandwidth channel switch element, so
1023                          * just parse it out manually.
1024                          */
1025                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1026                                               pos, elen);
1027                         if (ie) {
1028                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1029                                         elems->wide_bw_chansw_ie =
1030                                                 (void *)(ie + 2);
1031                                 else
1032                                         elem_parse_failed = true;
1033                         }
1034                         break;
1035                 case WLAN_EID_COUNTRY:
1036                         elems->country_elem = pos;
1037                         elems->country_elem_len = elen;
1038                         break;
1039                 case WLAN_EID_PWR_CONSTRAINT:
1040                         if (elen != 1) {
1041                                 elem_parse_failed = true;
1042                                 break;
1043                         }
1044                         elems->pwr_constr_elem = pos;
1045                         break;
1046                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1047                         /* Lots of different options exist, but we only care
1048                          * about the Dynamic Transmit Power Control element.
1049                          * First check for the Cisco OUI, then for the DTPC
1050                          * tag (0x00).
1051                          */
1052                         if (elen < 4) {
1053                                 elem_parse_failed = true;
1054                                 break;
1055                         }
1056
1057                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1058                             pos[2] != 0x96 || pos[3] != 0x00)
1059                                 break;
1060
1061                         if (elen != 6) {
1062                                 elem_parse_failed = true;
1063                                 break;
1064                         }
1065
1066                         if (calc_crc)
1067                                 crc = crc32_be(crc, pos - 2, elen + 2);
1068
1069                         elems->cisco_dtpc_elem = pos;
1070                         break;
1071                 case WLAN_EID_TIMEOUT_INTERVAL:
1072                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1073                                 elems->timeout_int = (void *)pos;
1074                         else
1075                                 elem_parse_failed = true;
1076                         break;
1077                 default:
1078                         break;
1079                 }
1080
1081                 if (elem_parse_failed)
1082                         elems->parse_error = true;
1083                 else
1084                         __set_bit(id, seen_elems);
1085
1086                 left -= elen;
1087                 pos += elen;
1088         }
1089
1090         if (left != 0)
1091                 elems->parse_error = true;
1092
1093         return crc;
1094 }
1095
1096 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1097                                bool bss_notify)
1098 {
1099         struct ieee80211_local *local = sdata->local;
1100         struct ieee80211_tx_queue_params qparam;
1101         struct ieee80211_chanctx_conf *chanctx_conf;
1102         int ac;
1103         bool use_11b, enable_qos;
1104         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1105         int aCWmin, aCWmax;
1106
1107         if (!local->ops->conf_tx)
1108                 return;
1109
1110         if (local->hw.queues < IEEE80211_NUM_ACS)
1111                 return;
1112
1113         memset(&qparam, 0, sizeof(qparam));
1114
1115         rcu_read_lock();
1116         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1117         use_11b = (chanctx_conf &&
1118                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1119                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1120         rcu_read_unlock();
1121
1122         /*
1123          * By default disable QoS in STA mode for old access points, which do
1124          * not support 802.11e. New APs will provide proper queue parameters,
1125          * that we will configure later.
1126          */
1127         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1128
1129         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1130
1131         /* Set defaults according to 802.11-2007 Table 7-37 */
1132         aCWmax = 1023;
1133         if (use_11b)
1134                 aCWmin = 31;
1135         else
1136                 aCWmin = 15;
1137
1138         /* Confiure old 802.11b/g medium access rules. */
1139         qparam.cw_max = aCWmax;
1140         qparam.cw_min = aCWmin;
1141         qparam.txop = 0;
1142         qparam.aifs = 2;
1143
1144         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1145                 /* Update if QoS is enabled. */
1146                 if (enable_qos) {
1147                         switch (ac) {
1148                         case IEEE80211_AC_BK:
1149                                 qparam.cw_max = aCWmax;
1150                                 qparam.cw_min = aCWmin;
1151                                 qparam.txop = 0;
1152                                 if (is_ocb)
1153                                         qparam.aifs = 9;
1154                                 else
1155                                         qparam.aifs = 7;
1156                                 break;
1157                         /* never happens but let's not leave undefined */
1158                         default:
1159                         case IEEE80211_AC_BE:
1160                                 qparam.cw_max = aCWmax;
1161                                 qparam.cw_min = aCWmin;
1162                                 qparam.txop = 0;
1163                                 if (is_ocb)
1164                                         qparam.aifs = 6;
1165                                 else
1166                                         qparam.aifs = 3;
1167                                 break;
1168                         case IEEE80211_AC_VI:
1169                                 qparam.cw_max = aCWmin;
1170                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1171                                 if (is_ocb)
1172                                         qparam.txop = 0;
1173                                 else if (use_11b)
1174                                         qparam.txop = 6016/32;
1175                                 else
1176                                         qparam.txop = 3008/32;
1177
1178                                 if (is_ocb)
1179                                         qparam.aifs = 3;
1180                                 else
1181                                         qparam.aifs = 2;
1182                                 break;
1183                         case IEEE80211_AC_VO:
1184                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1185                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1186                                 if (is_ocb)
1187                                         qparam.txop = 0;
1188                                 else if (use_11b)
1189                                         qparam.txop = 3264/32;
1190                                 else
1191                                         qparam.txop = 1504/32;
1192                                 qparam.aifs = 2;
1193                                 break;
1194                         }
1195                 }
1196
1197                 qparam.uapsd = false;
1198
1199                 sdata->tx_conf[ac] = qparam;
1200                 drv_conf_tx(local, sdata, ac, &qparam);
1201         }
1202
1203         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1204             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1205                 sdata->vif.bss_conf.qos = enable_qos;
1206                 if (bss_notify)
1207                         ieee80211_bss_info_change_notify(sdata,
1208                                                          BSS_CHANGED_QOS);
1209         }
1210 }
1211
1212 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1213                          u16 transaction, u16 auth_alg, u16 status,
1214                          const u8 *extra, size_t extra_len, const u8 *da,
1215                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1216                          u32 tx_flags)
1217 {
1218         struct ieee80211_local *local = sdata->local;
1219         struct sk_buff *skb;
1220         struct ieee80211_mgmt *mgmt;
1221         int err;
1222
1223         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1224         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1225                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1226         if (!skb)
1227                 return;
1228
1229         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1230
1231         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1232         memset(mgmt, 0, 24 + 6);
1233         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1234                                           IEEE80211_STYPE_AUTH);
1235         memcpy(mgmt->da, da, ETH_ALEN);
1236         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1237         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1238         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1239         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1240         mgmt->u.auth.status_code = cpu_to_le16(status);
1241         if (extra)
1242                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1243
1244         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1245                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1246                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1247                 WARN_ON(err);
1248         }
1249
1250         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1251                                         tx_flags;
1252         ieee80211_tx_skb(sdata, skb);
1253 }
1254
1255 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1256                                     const u8 *bssid, u16 stype, u16 reason,
1257                                     bool send_frame, u8 *frame_buf)
1258 {
1259         struct ieee80211_local *local = sdata->local;
1260         struct sk_buff *skb;
1261         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1262
1263         /* build frame */
1264         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1265         mgmt->duration = 0; /* initialize only */
1266         mgmt->seq_ctrl = 0; /* initialize only */
1267         memcpy(mgmt->da, bssid, ETH_ALEN);
1268         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1269         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1270         /* u.deauth.reason_code == u.disassoc.reason_code */
1271         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1272
1273         if (send_frame) {
1274                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1275                                     IEEE80211_DEAUTH_FRAME_LEN);
1276                 if (!skb)
1277                         return;
1278
1279                 skb_reserve(skb, local->hw.extra_tx_headroom);
1280
1281                 /* copy in frame */
1282                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1283                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1284
1285                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1286                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1287                         IEEE80211_SKB_CB(skb)->flags |=
1288                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1289
1290                 ieee80211_tx_skb(sdata, skb);
1291         }
1292 }
1293
1294 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1295                                          u8 *buffer, size_t buffer_len,
1296                                          const u8 *ie, size_t ie_len,
1297                                          enum ieee80211_band band,
1298                                          u32 rate_mask,
1299                                          struct cfg80211_chan_def *chandef,
1300                                          size_t *offset)
1301 {
1302         struct ieee80211_supported_band *sband;
1303         u8 *pos = buffer, *end = buffer + buffer_len;
1304         size_t noffset;
1305         int supp_rates_len, i;
1306         u8 rates[32];
1307         int num_rates;
1308         int ext_rates_len;
1309         int shift;
1310         u32 rate_flags;
1311
1312         *offset = 0;
1313
1314         sband = local->hw.wiphy->bands[band];
1315         if (WARN_ON_ONCE(!sband))
1316                 return 0;
1317
1318         rate_flags = ieee80211_chandef_rate_flags(chandef);
1319         shift = ieee80211_chandef_get_shift(chandef);
1320
1321         num_rates = 0;
1322         for (i = 0; i < sband->n_bitrates; i++) {
1323                 if ((BIT(i) & rate_mask) == 0)
1324                         continue; /* skip rate */
1325                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1326                         continue;
1327
1328                 rates[num_rates++] =
1329                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1330                                           (1 << shift) * 5);
1331         }
1332
1333         supp_rates_len = min_t(int, num_rates, 8);
1334
1335         if (end - pos < 2 + supp_rates_len)
1336                 goto out_err;
1337         *pos++ = WLAN_EID_SUPP_RATES;
1338         *pos++ = supp_rates_len;
1339         memcpy(pos, rates, supp_rates_len);
1340         pos += supp_rates_len;
1341
1342         /* insert "request information" if in custom IEs */
1343         if (ie && ie_len) {
1344                 static const u8 before_extrates[] = {
1345                         WLAN_EID_SSID,
1346                         WLAN_EID_SUPP_RATES,
1347                         WLAN_EID_REQUEST,
1348                 };
1349                 noffset = ieee80211_ie_split(ie, ie_len,
1350                                              before_extrates,
1351                                              ARRAY_SIZE(before_extrates),
1352                                              *offset);
1353                 if (end - pos < noffset - *offset)
1354                         goto out_err;
1355                 memcpy(pos, ie + *offset, noffset - *offset);
1356                 pos += noffset - *offset;
1357                 *offset = noffset;
1358         }
1359
1360         ext_rates_len = num_rates - supp_rates_len;
1361         if (ext_rates_len > 0) {
1362                 if (end - pos < 2 + ext_rates_len)
1363                         goto out_err;
1364                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1365                 *pos++ = ext_rates_len;
1366                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1367                 pos += ext_rates_len;
1368         }
1369
1370         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1371                 if (end - pos < 3)
1372                         goto out_err;
1373                 *pos++ = WLAN_EID_DS_PARAMS;
1374                 *pos++ = 1;
1375                 *pos++ = ieee80211_frequency_to_channel(
1376                                 chandef->chan->center_freq);
1377         }
1378
1379         /* insert custom IEs that go before HT */
1380         if (ie && ie_len) {
1381                 static const u8 before_ht[] = {
1382                         WLAN_EID_SSID,
1383                         WLAN_EID_SUPP_RATES,
1384                         WLAN_EID_REQUEST,
1385                         WLAN_EID_EXT_SUPP_RATES,
1386                         WLAN_EID_DS_PARAMS,
1387                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1388                 };
1389                 noffset = ieee80211_ie_split(ie, ie_len,
1390                                              before_ht, ARRAY_SIZE(before_ht),
1391                                              *offset);
1392                 if (end - pos < noffset - *offset)
1393                         goto out_err;
1394                 memcpy(pos, ie + *offset, noffset - *offset);
1395                 pos += noffset - *offset;
1396                 *offset = noffset;
1397         }
1398
1399         if (sband->ht_cap.ht_supported) {
1400                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1401                         goto out_err;
1402                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1403                                                 sband->ht_cap.cap);
1404         }
1405
1406         /*
1407          * If adding more here, adjust code in main.c
1408          * that calculates local->scan_ies_len.
1409          */
1410
1411         /* insert custom IEs that go before VHT */
1412         if (ie && ie_len) {
1413                 static const u8 before_vht[] = {
1414                         WLAN_EID_SSID,
1415                         WLAN_EID_SUPP_RATES,
1416                         WLAN_EID_REQUEST,
1417                         WLAN_EID_EXT_SUPP_RATES,
1418                         WLAN_EID_DS_PARAMS,
1419                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420                         WLAN_EID_HT_CAPABILITY,
1421                         WLAN_EID_BSS_COEX_2040,
1422                         WLAN_EID_EXT_CAPABILITY,
1423                         WLAN_EID_SSID_LIST,
1424                         WLAN_EID_CHANNEL_USAGE,
1425                         WLAN_EID_INTERWORKING,
1426                         /* mesh ID can't happen here */
1427                         /* 60 GHz can't happen here right now */
1428                 };
1429                 noffset = ieee80211_ie_split(ie, ie_len,
1430                                              before_vht, ARRAY_SIZE(before_vht),
1431                                              *offset);
1432                 if (end - pos < noffset - *offset)
1433                         goto out_err;
1434                 memcpy(pos, ie + *offset, noffset - *offset);
1435                 pos += noffset - *offset;
1436                 *offset = noffset;
1437         }
1438
1439         if (sband->vht_cap.vht_supported) {
1440                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1441                         goto out_err;
1442                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1443                                                  sband->vht_cap.cap);
1444         }
1445
1446         return pos - buffer;
1447  out_err:
1448         WARN_ONCE(1, "not enough space for preq IEs\n");
1449         return pos - buffer;
1450 }
1451
1452 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1453                              size_t buffer_len,
1454                              struct ieee80211_scan_ies *ie_desc,
1455                              const u8 *ie, size_t ie_len,
1456                              u8 bands_used, u32 *rate_masks,
1457                              struct cfg80211_chan_def *chandef)
1458 {
1459         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1460         int i;
1461
1462         memset(ie_desc, 0, sizeof(*ie_desc));
1463
1464         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1465                 if (bands_used & BIT(i)) {
1466                         pos += ieee80211_build_preq_ies_band(local,
1467                                                              buffer + pos,
1468                                                              buffer_len - pos,
1469                                                              ie, ie_len, i,
1470                                                              rate_masks[i],
1471                                                              chandef,
1472                                                              &custom_ie_offset);
1473                         ie_desc->ies[i] = buffer + old_pos;
1474                         ie_desc->len[i] = pos - old_pos;
1475                         old_pos = pos;
1476                 }
1477         }
1478
1479         /* add any remaining custom IEs */
1480         if (ie && ie_len) {
1481                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1482                               "not enough space for preq custom IEs\n"))
1483                         return pos;
1484                 memcpy(buffer + pos, ie + custom_ie_offset,
1485                        ie_len - custom_ie_offset);
1486                 ie_desc->common_ies = buffer + pos;
1487                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1488                 pos += ie_len - custom_ie_offset;
1489         }
1490
1491         return pos;
1492 };
1493
1494 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1495                                           u8 *dst, u32 ratemask,
1496                                           struct ieee80211_channel *chan,
1497                                           const u8 *ssid, size_t ssid_len,
1498                                           const u8 *ie, size_t ie_len,
1499                                           bool directed)
1500 {
1501         struct ieee80211_local *local = sdata->local;
1502         struct cfg80211_chan_def chandef;
1503         struct sk_buff *skb;
1504         struct ieee80211_mgmt *mgmt;
1505         int ies_len;
1506         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1507         struct ieee80211_scan_ies dummy_ie_desc;
1508
1509         /*
1510          * Do not send DS Channel parameter for directed probe requests
1511          * in order to maximize the chance that we get a response.  Some
1512          * badly-behaved APs don't respond when this parameter is included.
1513          */
1514         chandef.width = sdata->vif.bss_conf.chandef.width;
1515         if (directed)
1516                 chandef.chan = NULL;
1517         else
1518                 chandef.chan = chan;
1519
1520         skb = ieee80211_probereq_get(&local->hw, &sdata->vif,
1521                                      ssid, ssid_len, 100 + ie_len);
1522         if (!skb)
1523                 return NULL;
1524
1525         rate_masks[chan->band] = ratemask;
1526         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1527                                            skb_tailroom(skb), &dummy_ie_desc,
1528                                            ie, ie_len, BIT(chan->band),
1529                                            rate_masks, &chandef);
1530         skb_put(skb, ies_len);
1531
1532         if (dst) {
1533                 mgmt = (struct ieee80211_mgmt *) skb->data;
1534                 memcpy(mgmt->da, dst, ETH_ALEN);
1535                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1536         }
1537
1538         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1539
1540         return skb;
1541 }
1542
1543 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
1544                               const u8 *ssid, size_t ssid_len,
1545                               const u8 *ie, size_t ie_len,
1546                               u32 ratemask, bool directed, u32 tx_flags,
1547                               struct ieee80211_channel *channel, bool scan)
1548 {
1549         struct sk_buff *skb;
1550
1551         skb = ieee80211_build_probe_req(sdata, dst, ratemask, channel,
1552                                         ssid, ssid_len,
1553                                         ie, ie_len, directed);
1554         if (skb) {
1555                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1556                 if (scan)
1557                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1558                 else
1559                         ieee80211_tx_skb(sdata, skb);
1560         }
1561 }
1562
1563 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1564                             struct ieee802_11_elems *elems,
1565                             enum ieee80211_band band, u32 *basic_rates)
1566 {
1567         struct ieee80211_supported_band *sband;
1568         size_t num_rates;
1569         u32 supp_rates, rate_flags;
1570         int i, j, shift;
1571         sband = sdata->local->hw.wiphy->bands[band];
1572
1573         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1574         shift = ieee80211_vif_get_shift(&sdata->vif);
1575
1576         if (WARN_ON(!sband))
1577                 return 1;
1578
1579         num_rates = sband->n_bitrates;
1580         supp_rates = 0;
1581         for (i = 0; i < elems->supp_rates_len +
1582                      elems->ext_supp_rates_len; i++) {
1583                 u8 rate = 0;
1584                 int own_rate;
1585                 bool is_basic;
1586                 if (i < elems->supp_rates_len)
1587                         rate = elems->supp_rates[i];
1588                 else if (elems->ext_supp_rates)
1589                         rate = elems->ext_supp_rates
1590                                 [i - elems->supp_rates_len];
1591                 own_rate = 5 * (rate & 0x7f);
1592                 is_basic = !!(rate & 0x80);
1593
1594                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1595                         continue;
1596
1597                 for (j = 0; j < num_rates; j++) {
1598                         int brate;
1599                         if ((rate_flags & sband->bitrates[j].flags)
1600                             != rate_flags)
1601                                 continue;
1602
1603                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1604                                              1 << shift);
1605
1606                         if (brate == own_rate) {
1607                                 supp_rates |= BIT(j);
1608                                 if (basic_rates && is_basic)
1609                                         *basic_rates |= BIT(j);
1610                         }
1611                 }
1612         }
1613         return supp_rates;
1614 }
1615
1616 void ieee80211_stop_device(struct ieee80211_local *local)
1617 {
1618         ieee80211_led_radio(local, false);
1619         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1620
1621         cancel_work_sync(&local->reconfig_filter);
1622
1623         flush_workqueue(local->workqueue);
1624         drv_stop(local);
1625 }
1626
1627 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1628 {
1629         struct ieee80211_sub_if_data *sdata;
1630         struct ieee80211_chanctx *ctx;
1631
1632         /*
1633          * We get here if during resume the device can't be restarted properly.
1634          * We might also get here if this happens during HW reset, which is a
1635          * slightly different situation and we need to drop all connections in
1636          * the latter case.
1637          *
1638          * Ask cfg80211 to turn off all interfaces, this will result in more
1639          * warnings but at least we'll then get into a clean stopped state.
1640          */
1641
1642         local->resuming = false;
1643         local->suspended = false;
1644         local->started = false;
1645
1646         /* scheduled scan clearly can't be running any more, but tell
1647          * cfg80211 and clear local state
1648          */
1649         ieee80211_sched_scan_end(local);
1650
1651         list_for_each_entry(sdata, &local->interfaces, list)
1652                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1653
1654         /* Mark channel contexts as not being in the driver any more to avoid
1655          * removing them from the driver during the shutdown process...
1656          */
1657         mutex_lock(&local->chanctx_mtx);
1658         list_for_each_entry(ctx, &local->chanctx_list, list)
1659                 ctx->driver_present = false;
1660         mutex_unlock(&local->chanctx_mtx);
1661
1662         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1663 }
1664
1665 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1666                                      struct ieee80211_sub_if_data *sdata)
1667 {
1668         struct ieee80211_chanctx_conf *conf;
1669         struct ieee80211_chanctx *ctx;
1670
1671         if (!local->use_chanctx)
1672                 return;
1673
1674         mutex_lock(&local->chanctx_mtx);
1675         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1676                                          lockdep_is_held(&local->chanctx_mtx));
1677         if (conf) {
1678                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1679                 drv_assign_vif_chanctx(local, sdata, ctx);
1680         }
1681         mutex_unlock(&local->chanctx_mtx);
1682 }
1683
1684 int ieee80211_reconfig(struct ieee80211_local *local)
1685 {
1686         struct ieee80211_hw *hw = &local->hw;
1687         struct ieee80211_sub_if_data *sdata;
1688         struct ieee80211_chanctx *ctx;
1689         struct sta_info *sta;
1690         int res, i;
1691         bool reconfig_due_to_wowlan = false;
1692         struct ieee80211_sub_if_data *sched_scan_sdata;
1693         bool sched_scan_stopped = false;
1694
1695 #ifdef CONFIG_PM
1696         if (local->suspended)
1697                 local->resuming = true;
1698
1699         if (local->wowlan) {
1700                 res = drv_resume(local);
1701                 local->wowlan = false;
1702                 if (res < 0) {
1703                         local->resuming = false;
1704                         return res;
1705                 }
1706                 if (res == 0)
1707                         goto wake_up;
1708                 WARN_ON(res > 1);
1709                 /*
1710                  * res is 1, which means the driver requested
1711                  * to go through a regular reset on wakeup.
1712                  */
1713                 reconfig_due_to_wowlan = true;
1714         }
1715 #endif
1716         /* everything else happens only if HW was up & running */
1717         if (!local->open_count)
1718                 goto wake_up;
1719
1720         /*
1721          * Upon resume hardware can sometimes be goofy due to
1722          * various platform / driver / bus issues, so restarting
1723          * the device may at times not work immediately. Propagate
1724          * the error.
1725          */
1726         res = drv_start(local);
1727         if (res) {
1728                 if (local->suspended)
1729                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1730                 else
1731                         WARN(1, "Hardware became unavailable during restart.\n");
1732                 ieee80211_handle_reconfig_failure(local);
1733                 return res;
1734         }
1735
1736         /* setup fragmentation threshold */
1737         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1738
1739         /* setup RTS threshold */
1740         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1741
1742         /* reset coverage class */
1743         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1744
1745         ieee80211_led_radio(local, true);
1746         ieee80211_mod_tpt_led_trig(local,
1747                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1748
1749         /* add interfaces */
1750         sdata = rtnl_dereference(local->monitor_sdata);
1751         if (sdata) {
1752                 /* in HW restart it exists already */
1753                 WARN_ON(local->resuming);
1754                 res = drv_add_interface(local, sdata);
1755                 if (WARN_ON(res)) {
1756                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1757                         synchronize_net();
1758                         kfree(sdata);
1759                 }
1760         }
1761
1762         list_for_each_entry(sdata, &local->interfaces, list) {
1763                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1764                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1765                     ieee80211_sdata_running(sdata))
1766                         res = drv_add_interface(local, sdata);
1767         }
1768
1769         /* add channel contexts */
1770         if (local->use_chanctx) {
1771                 mutex_lock(&local->chanctx_mtx);
1772                 list_for_each_entry(ctx, &local->chanctx_list, list)
1773                         if (ctx->replace_state !=
1774                             IEEE80211_CHANCTX_REPLACES_OTHER)
1775                                 WARN_ON(drv_add_chanctx(local, ctx));
1776                 mutex_unlock(&local->chanctx_mtx);
1777
1778                 list_for_each_entry(sdata, &local->interfaces, list) {
1779                         if (!ieee80211_sdata_running(sdata))
1780                                 continue;
1781                         ieee80211_assign_chanctx(local, sdata);
1782                 }
1783
1784                 sdata = rtnl_dereference(local->monitor_sdata);
1785                 if (sdata && ieee80211_sdata_running(sdata))
1786                         ieee80211_assign_chanctx(local, sdata);
1787         }
1788
1789         /* add STAs back */
1790         mutex_lock(&local->sta_mtx);
1791         list_for_each_entry(sta, &local->sta_list, list) {
1792                 enum ieee80211_sta_state state;
1793
1794                 if (!sta->uploaded)
1795                         continue;
1796
1797                 /* AP-mode stations will be added later */
1798                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1799                         continue;
1800
1801                 for (state = IEEE80211_STA_NOTEXIST;
1802                      state < sta->sta_state; state++)
1803                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1804                                               state + 1));
1805         }
1806         mutex_unlock(&local->sta_mtx);
1807
1808         /* reconfigure tx conf */
1809         if (hw->queues >= IEEE80211_NUM_ACS) {
1810                 list_for_each_entry(sdata, &local->interfaces, list) {
1811                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1812                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1813                             !ieee80211_sdata_running(sdata))
1814                                 continue;
1815
1816                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1817                                 drv_conf_tx(local, sdata, i,
1818                                             &sdata->tx_conf[i]);
1819                 }
1820         }
1821
1822         /* reconfigure hardware */
1823         ieee80211_hw_config(local, ~0);
1824
1825         ieee80211_configure_filter(local);
1826
1827         /* Finally also reconfigure all the BSS information */
1828         list_for_each_entry(sdata, &local->interfaces, list) {
1829                 u32 changed;
1830
1831                 if (!ieee80211_sdata_running(sdata))
1832                         continue;
1833
1834                 /* common change flags for all interface types */
1835                 changed = BSS_CHANGED_ERP_CTS_PROT |
1836                           BSS_CHANGED_ERP_PREAMBLE |
1837                           BSS_CHANGED_ERP_SLOT |
1838                           BSS_CHANGED_HT |
1839                           BSS_CHANGED_BASIC_RATES |
1840                           BSS_CHANGED_BEACON_INT |
1841                           BSS_CHANGED_BSSID |
1842                           BSS_CHANGED_CQM |
1843                           BSS_CHANGED_QOS |
1844                           BSS_CHANGED_IDLE |
1845                           BSS_CHANGED_TXPOWER;
1846
1847                 switch (sdata->vif.type) {
1848                 case NL80211_IFTYPE_STATION:
1849                         changed |= BSS_CHANGED_ASSOC |
1850                                    BSS_CHANGED_ARP_FILTER |
1851                                    BSS_CHANGED_PS;
1852
1853                         /* Re-send beacon info report to the driver */
1854                         if (sdata->u.mgd.have_beacon)
1855                                 changed |= BSS_CHANGED_BEACON_INFO;
1856
1857                         sdata_lock(sdata);
1858                         ieee80211_bss_info_change_notify(sdata, changed);
1859                         sdata_unlock(sdata);
1860                         break;
1861                 case NL80211_IFTYPE_OCB:
1862                         changed |= BSS_CHANGED_OCB;
1863                         ieee80211_bss_info_change_notify(sdata, changed);
1864                         break;
1865                 case NL80211_IFTYPE_ADHOC:
1866                         changed |= BSS_CHANGED_IBSS;
1867                         /* fall through */
1868                 case NL80211_IFTYPE_AP:
1869                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1870
1871                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1872                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1873
1874                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1875                                         drv_start_ap(local, sdata);
1876                         }
1877
1878                         /* fall through */
1879                 case NL80211_IFTYPE_MESH_POINT:
1880                         if (sdata->vif.bss_conf.enable_beacon) {
1881                                 changed |= BSS_CHANGED_BEACON |
1882                                            BSS_CHANGED_BEACON_ENABLED;
1883                                 ieee80211_bss_info_change_notify(sdata, changed);
1884                         }
1885                         break;
1886                 case NL80211_IFTYPE_WDS:
1887                 case NL80211_IFTYPE_AP_VLAN:
1888                 case NL80211_IFTYPE_MONITOR:
1889                 case NL80211_IFTYPE_P2P_DEVICE:
1890                         /* nothing to do */
1891                         break;
1892                 case NL80211_IFTYPE_UNSPECIFIED:
1893                 case NUM_NL80211_IFTYPES:
1894                 case NL80211_IFTYPE_P2P_CLIENT:
1895                 case NL80211_IFTYPE_P2P_GO:
1896                         WARN_ON(1);
1897                         break;
1898                 }
1899         }
1900
1901         ieee80211_recalc_ps(local, -1);
1902
1903         /*
1904          * The sta might be in psm against the ap (e.g. because
1905          * this was the state before a hw restart), so we
1906          * explicitly send a null packet in order to make sure
1907          * it'll sync against the ap (and get out of psm).
1908          */
1909         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1910                 list_for_each_entry(sdata, &local->interfaces, list) {
1911                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1912                                 continue;
1913                         if (!sdata->u.mgd.associated)
1914                                 continue;
1915
1916                         ieee80211_send_nullfunc(local, sdata, 0);
1917                 }
1918         }
1919
1920         /* APs are now beaconing, add back stations */
1921         mutex_lock(&local->sta_mtx);
1922         list_for_each_entry(sta, &local->sta_list, list) {
1923                 enum ieee80211_sta_state state;
1924
1925                 if (!sta->uploaded)
1926                         continue;
1927
1928                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1929                         continue;
1930
1931                 for (state = IEEE80211_STA_NOTEXIST;
1932                      state < sta->sta_state; state++)
1933                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1934                                               state + 1));
1935         }
1936         mutex_unlock(&local->sta_mtx);
1937
1938         /* add back keys */
1939         list_for_each_entry(sdata, &local->interfaces, list)
1940                 if (ieee80211_sdata_running(sdata))
1941                         ieee80211_enable_keys(sdata);
1942
1943  wake_up:
1944         local->in_reconfig = false;
1945         barrier();
1946
1947         if (local->monitors == local->open_count && local->monitors > 0)
1948                 ieee80211_add_virtual_monitor(local);
1949
1950         /*
1951          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1952          * sessions can be established after a resume.
1953          *
1954          * Also tear down aggregation sessions since reconfiguring
1955          * them in a hardware restart scenario is not easily done
1956          * right now, and the hardware will have lost information
1957          * about the sessions, but we and the AP still think they
1958          * are active. This is really a workaround though.
1959          */
1960         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1961                 mutex_lock(&local->sta_mtx);
1962
1963                 list_for_each_entry(sta, &local->sta_list, list) {
1964                         ieee80211_sta_tear_down_BA_sessions(
1965                                         sta, AGG_STOP_LOCAL_REQUEST);
1966                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
1967                 }
1968
1969                 mutex_unlock(&local->sta_mtx);
1970         }
1971
1972         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1973                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1974                                         false);
1975
1976         /*
1977          * Reconfigure sched scan if it was interrupted by FW restart or
1978          * suspend.
1979          */
1980         mutex_lock(&local->mtx);
1981         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
1982                                                 lockdep_is_held(&local->mtx));
1983         if (sched_scan_sdata && local->sched_scan_req)
1984                 /*
1985                  * Sched scan stopped, but we don't want to report it. Instead,
1986                  * we're trying to reschedule.
1987                  */
1988                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
1989                                                          local->sched_scan_req))
1990                         sched_scan_stopped = true;
1991         mutex_unlock(&local->mtx);
1992
1993         if (sched_scan_stopped)
1994                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
1995
1996         /*
1997          * If this is for hw restart things are still running.
1998          * We may want to change that later, however.
1999          */
2000         if (!local->suspended || reconfig_due_to_wowlan)
2001                 drv_restart_complete(local);
2002
2003         if (!local->suspended)
2004                 return 0;
2005
2006 #ifdef CONFIG_PM
2007         /* first set suspended false, then resuming */
2008         local->suspended = false;
2009         mb();
2010         local->resuming = false;
2011
2012         list_for_each_entry(sdata, &local->interfaces, list) {
2013                 if (!ieee80211_sdata_running(sdata))
2014                         continue;
2015                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2016                         ieee80211_sta_restart(sdata);
2017         }
2018
2019         mod_timer(&local->sta_cleanup, jiffies + 1);
2020 #else
2021         WARN_ON(1);
2022 #endif
2023
2024         return 0;
2025 }
2026
2027 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2028 {
2029         struct ieee80211_sub_if_data *sdata;
2030         struct ieee80211_local *local;
2031         struct ieee80211_key *key;
2032
2033         if (WARN_ON(!vif))
2034                 return;
2035
2036         sdata = vif_to_sdata(vif);
2037         local = sdata->local;
2038
2039         if (WARN_ON(!local->resuming))
2040                 return;
2041
2042         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2043                 return;
2044
2045         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2046
2047         mutex_lock(&local->key_mtx);
2048         list_for_each_entry(key, &sdata->key_list, list)
2049                 key->flags |= KEY_FLAG_TAINTED;
2050         mutex_unlock(&local->key_mtx);
2051 }
2052 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2053
2054 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2055 {
2056         struct ieee80211_local *local = sdata->local;
2057         struct ieee80211_chanctx_conf *chanctx_conf;
2058         struct ieee80211_chanctx *chanctx;
2059
2060         mutex_lock(&local->chanctx_mtx);
2061
2062         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2063                                         lockdep_is_held(&local->chanctx_mtx));
2064
2065         if (WARN_ON_ONCE(!chanctx_conf))
2066                 goto unlock;
2067
2068         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2069         ieee80211_recalc_smps_chanctx(local, chanctx);
2070  unlock:
2071         mutex_unlock(&local->chanctx_mtx);
2072 }
2073
2074 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2075 {
2076         struct ieee80211_local *local = sdata->local;
2077         struct ieee80211_chanctx_conf *chanctx_conf;
2078         struct ieee80211_chanctx *chanctx;
2079
2080         mutex_lock(&local->chanctx_mtx);
2081
2082         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2083                                         lockdep_is_held(&local->chanctx_mtx));
2084
2085         if (WARN_ON_ONCE(!chanctx_conf))
2086                 goto unlock;
2087
2088         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2089         ieee80211_recalc_chanctx_min_def(local, chanctx);
2090  unlock:
2091         mutex_unlock(&local->chanctx_mtx);
2092 }
2093
2094 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2095 {
2096         int i;
2097
2098         for (i = 0; i < n_ids; i++)
2099                 if (ids[i] == id)
2100                         return true;
2101         return false;
2102 }
2103
2104 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2105                           const u8 *ids, int n_ids, size_t offset)
2106 {
2107         size_t pos = offset;
2108
2109         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos]))
2110                 pos += 2 + ies[pos + 1];
2111
2112         return pos;
2113 }
2114 EXPORT_SYMBOL(ieee80211_ie_split);
2115
2116 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2117 {
2118         size_t pos = offset;
2119
2120         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2121                 pos += 2 + ies[pos + 1];
2122
2123         return pos;
2124 }
2125
2126 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2127                                             int rssi_min_thold,
2128                                             int rssi_max_thold)
2129 {
2130         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2131
2132         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2133                 return;
2134
2135         /*
2136          * Scale up threshold values before storing it, as the RSSI averaging
2137          * algorithm uses a scaled up value as well. Change this scaling
2138          * factor if the RSSI averaging algorithm changes.
2139          */
2140         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2141         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2142 }
2143
2144 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2145                                     int rssi_min_thold,
2146                                     int rssi_max_thold)
2147 {
2148         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2149
2150         WARN_ON(rssi_min_thold == rssi_max_thold ||
2151                 rssi_min_thold > rssi_max_thold);
2152
2153         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2154                                        rssi_max_thold);
2155 }
2156 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2157
2158 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2159 {
2160         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2161
2162         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2163 }
2164 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2165
2166 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2167                               u16 cap)
2168 {
2169         __le16 tmp;
2170
2171         *pos++ = WLAN_EID_HT_CAPABILITY;
2172         *pos++ = sizeof(struct ieee80211_ht_cap);
2173         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2174
2175         /* capability flags */
2176         tmp = cpu_to_le16(cap);
2177         memcpy(pos, &tmp, sizeof(u16));
2178         pos += sizeof(u16);
2179
2180         /* AMPDU parameters */
2181         *pos++ = ht_cap->ampdu_factor |
2182                  (ht_cap->ampdu_density <<
2183                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2184
2185         /* MCS set */
2186         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2187         pos += sizeof(ht_cap->mcs);
2188
2189         /* extended capabilities */
2190         pos += sizeof(__le16);
2191
2192         /* BF capabilities */
2193         pos += sizeof(__le32);
2194
2195         /* antenna selection */
2196         pos += sizeof(u8);
2197
2198         return pos;
2199 }
2200
2201 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2202                                u32 cap)
2203 {
2204         __le32 tmp;
2205
2206         *pos++ = WLAN_EID_VHT_CAPABILITY;
2207         *pos++ = sizeof(struct ieee80211_vht_cap);
2208         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2209
2210         /* capability flags */
2211         tmp = cpu_to_le32(cap);
2212         memcpy(pos, &tmp, sizeof(u32));
2213         pos += sizeof(u32);
2214
2215         /* VHT MCS set */
2216         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2217         pos += sizeof(vht_cap->vht_mcs);
2218
2219         return pos;
2220 }
2221
2222 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2223                                const struct cfg80211_chan_def *chandef,
2224                                u16 prot_mode)
2225 {
2226         struct ieee80211_ht_operation *ht_oper;
2227         /* Build HT Information */
2228         *pos++ = WLAN_EID_HT_OPERATION;
2229         *pos++ = sizeof(struct ieee80211_ht_operation);
2230         ht_oper = (struct ieee80211_ht_operation *)pos;
2231         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2232                                         chandef->chan->center_freq);
2233         switch (chandef->width) {
2234         case NL80211_CHAN_WIDTH_160:
2235         case NL80211_CHAN_WIDTH_80P80:
2236         case NL80211_CHAN_WIDTH_80:
2237         case NL80211_CHAN_WIDTH_40:
2238                 if (chandef->center_freq1 > chandef->chan->center_freq)
2239                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2240                 else
2241                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2242                 break;
2243         default:
2244                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2245                 break;
2246         }
2247         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2248             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2249             chandef->width != NL80211_CHAN_WIDTH_20)
2250                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2251
2252         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2253         ht_oper->stbc_param = 0x0000;
2254
2255         /* It seems that Basic MCS set and Supported MCS set
2256            are identical for the first 10 bytes */
2257         memset(&ht_oper->basic_set, 0, 16);
2258         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2259
2260         return pos + sizeof(struct ieee80211_ht_operation);
2261 }
2262
2263 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2264                                   const struct ieee80211_ht_operation *ht_oper,
2265                                   struct cfg80211_chan_def *chandef)
2266 {
2267         enum nl80211_channel_type channel_type;
2268
2269         if (!ht_oper) {
2270                 cfg80211_chandef_create(chandef, control_chan,
2271                                         NL80211_CHAN_NO_HT);
2272                 return;
2273         }
2274
2275         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2276         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2277                 channel_type = NL80211_CHAN_HT20;
2278                 break;
2279         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2280                 channel_type = NL80211_CHAN_HT40PLUS;
2281                 break;
2282         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2283                 channel_type = NL80211_CHAN_HT40MINUS;
2284                 break;
2285         default:
2286                 channel_type = NL80211_CHAN_NO_HT;
2287         }
2288
2289         cfg80211_chandef_create(chandef, control_chan, channel_type);
2290 }
2291
2292 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2293                              const struct ieee80211_supported_band *sband,
2294                              const u8 *srates, int srates_len, u32 *rates)
2295 {
2296         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2297         int shift = ieee80211_chandef_get_shift(chandef);
2298         struct ieee80211_rate *br;
2299         int brate, rate, i, j, count = 0;
2300
2301         *rates = 0;
2302
2303         for (i = 0; i < srates_len; i++) {
2304                 rate = srates[i] & 0x7f;
2305
2306                 for (j = 0; j < sband->n_bitrates; j++) {
2307                         br = &sband->bitrates[j];
2308                         if ((rate_flags & br->flags) != rate_flags)
2309                                 continue;
2310
2311                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2312                         if (brate == rate) {
2313                                 *rates |= BIT(j);
2314                                 count++;
2315                                 break;
2316                         }
2317                 }
2318         }
2319         return count;
2320 }
2321
2322 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2323                             struct sk_buff *skb, bool need_basic,
2324                             enum ieee80211_band band)
2325 {
2326         struct ieee80211_local *local = sdata->local;
2327         struct ieee80211_supported_band *sband;
2328         int rate, shift;
2329         u8 i, rates, *pos;
2330         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2331         u32 rate_flags;
2332
2333         shift = ieee80211_vif_get_shift(&sdata->vif);
2334         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2335         sband = local->hw.wiphy->bands[band];
2336         rates = 0;
2337         for (i = 0; i < sband->n_bitrates; i++) {
2338                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2339                         continue;
2340                 rates++;
2341         }
2342         if (rates > 8)
2343                 rates = 8;
2344
2345         if (skb_tailroom(skb) < rates + 2)
2346                 return -ENOMEM;
2347
2348         pos = skb_put(skb, rates + 2);
2349         *pos++ = WLAN_EID_SUPP_RATES;
2350         *pos++ = rates;
2351         for (i = 0; i < rates; i++) {
2352                 u8 basic = 0;
2353                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2354                         continue;
2355
2356                 if (need_basic && basic_rates & BIT(i))
2357                         basic = 0x80;
2358                 rate = sband->bitrates[i].bitrate;
2359                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2360                                     5 * (1 << shift));
2361                 *pos++ = basic | (u8) rate;
2362         }
2363
2364         return 0;
2365 }
2366
2367 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2368                                 struct sk_buff *skb, bool need_basic,
2369                                 enum ieee80211_band band)
2370 {
2371         struct ieee80211_local *local = sdata->local;
2372         struct ieee80211_supported_band *sband;
2373         int rate, shift;
2374         u8 i, exrates, *pos;
2375         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2376         u32 rate_flags;
2377
2378         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2379         shift = ieee80211_vif_get_shift(&sdata->vif);
2380
2381         sband = local->hw.wiphy->bands[band];
2382         exrates = 0;
2383         for (i = 0; i < sband->n_bitrates; i++) {
2384                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2385                         continue;
2386                 exrates++;
2387         }
2388
2389         if (exrates > 8)
2390                 exrates -= 8;
2391         else
2392                 exrates = 0;
2393
2394         if (skb_tailroom(skb) < exrates + 2)
2395                 return -ENOMEM;
2396
2397         if (exrates) {
2398                 pos = skb_put(skb, exrates + 2);
2399                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2400                 *pos++ = exrates;
2401                 for (i = 8; i < sband->n_bitrates; i++) {
2402                         u8 basic = 0;
2403                         if ((rate_flags & sband->bitrates[i].flags)
2404                             != rate_flags)
2405                                 continue;
2406                         if (need_basic && basic_rates & BIT(i))
2407                                 basic = 0x80;
2408                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2409                                             5 * (1 << shift));
2410                         *pos++ = basic | (u8) rate;
2411                 }
2412         }
2413         return 0;
2414 }
2415
2416 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2417 {
2418         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2419         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2420
2421         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2422                 /* non-managed type inferfaces */
2423                 return 0;
2424         }
2425         return ifmgd->ave_beacon_signal / 16;
2426 }
2427 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2428
2429 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2430 {
2431         if (!mcs)
2432                 return 1;
2433
2434         /* TODO: consider rx_highest */
2435
2436         if (mcs->rx_mask[3])
2437                 return 4;
2438         if (mcs->rx_mask[2])
2439                 return 3;
2440         if (mcs->rx_mask[1])
2441                 return 2;
2442         return 1;
2443 }
2444
2445 /**
2446  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2447  * @local: mac80211 hw info struct
2448  * @status: RX status
2449  * @mpdu_len: total MPDU length (including FCS)
2450  * @mpdu_offset: offset into MPDU to calculate timestamp at
2451  *
2452  * This function calculates the RX timestamp at the given MPDU offset, taking
2453  * into account what the RX timestamp was. An offset of 0 will just normalize
2454  * the timestamp to TSF at beginning of MPDU reception.
2455  */
2456 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2457                                      struct ieee80211_rx_status *status,
2458                                      unsigned int mpdu_len,
2459                                      unsigned int mpdu_offset)
2460 {
2461         u64 ts = status->mactime;
2462         struct rate_info ri;
2463         u16 rate;
2464
2465         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2466                 return 0;
2467
2468         memset(&ri, 0, sizeof(ri));
2469
2470         /* Fill cfg80211 rate info */
2471         if (status->flag & RX_FLAG_HT) {
2472                 ri.mcs = status->rate_idx;
2473                 ri.flags |= RATE_INFO_FLAGS_MCS;
2474                 if (status->flag & RX_FLAG_40MHZ)
2475                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2476                 if (status->flag & RX_FLAG_SHORT_GI)
2477                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2478         } else if (status->flag & RX_FLAG_VHT) {
2479                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2480                 ri.mcs = status->rate_idx;
2481                 ri.nss = status->vht_nss;
2482                 if (status->flag & RX_FLAG_40MHZ)
2483                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2484                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2485                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2486                 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2487                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2488                 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2489                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2490                 if (status->flag & RX_FLAG_SHORT_GI)
2491                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2492         } else {
2493                 struct ieee80211_supported_band *sband;
2494                 int shift = 0;
2495                 int bitrate;
2496
2497                 if (status->flag & RX_FLAG_10MHZ)
2498                         shift = 1;
2499                 if (status->flag & RX_FLAG_5MHZ)
2500                         shift = 2;
2501
2502                 sband = local->hw.wiphy->bands[status->band];
2503                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2504                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2505         }
2506
2507         rate = cfg80211_calculate_bitrate(&ri);
2508         if (WARN_ONCE(!rate,
2509                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2510                       status->flag, status->rate_idx, status->vht_nss))
2511                 return 0;
2512
2513         /* rewind from end of MPDU */
2514         if (status->flag & RX_FLAG_MACTIME_END)
2515                 ts -= mpdu_len * 8 * 10 / rate;
2516
2517         ts += mpdu_offset * 8 * 10 / rate;
2518
2519         return ts;
2520 }
2521
2522 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2523 {
2524         struct ieee80211_sub_if_data *sdata;
2525         struct cfg80211_chan_def chandef;
2526
2527         mutex_lock(&local->mtx);
2528         mutex_lock(&local->iflist_mtx);
2529         list_for_each_entry(sdata, &local->interfaces, list) {
2530                 /* it might be waiting for the local->mtx, but then
2531                  * by the time it gets it, sdata->wdev.cac_started
2532                  * will no longer be true
2533                  */
2534                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2535
2536                 if (sdata->wdev.cac_started) {
2537                         chandef = sdata->vif.bss_conf.chandef;
2538                         ieee80211_vif_release_channel(sdata);
2539                         cfg80211_cac_event(sdata->dev,
2540                                            &chandef,
2541                                            NL80211_RADAR_CAC_ABORTED,
2542                                            GFP_KERNEL);
2543                 }
2544         }
2545         mutex_unlock(&local->iflist_mtx);
2546         mutex_unlock(&local->mtx);
2547 }
2548
2549 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2550 {
2551         struct ieee80211_local *local =
2552                 container_of(work, struct ieee80211_local, radar_detected_work);
2553         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2554         struct ieee80211_chanctx *ctx;
2555         int num_chanctx = 0;
2556
2557         mutex_lock(&local->chanctx_mtx);
2558         list_for_each_entry(ctx, &local->chanctx_list, list) {
2559                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2560                         continue;
2561
2562                 num_chanctx++;
2563                 chandef = ctx->conf.def;
2564         }
2565         mutex_unlock(&local->chanctx_mtx);
2566
2567         ieee80211_dfs_cac_cancel(local);
2568
2569         if (num_chanctx > 1)
2570                 /* XXX: multi-channel is not supported yet */
2571                 WARN_ON(1);
2572         else
2573                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2574 }
2575
2576 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2577 {
2578         struct ieee80211_local *local = hw_to_local(hw);
2579
2580         trace_api_radar_detected(local);
2581
2582         ieee80211_queue_work(hw, &local->radar_detected_work);
2583 }
2584 EXPORT_SYMBOL(ieee80211_radar_detected);
2585
2586 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2587 {
2588         u32 ret;
2589         int tmp;
2590
2591         switch (c->width) {
2592         case NL80211_CHAN_WIDTH_20:
2593                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2594                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2595                 break;
2596         case NL80211_CHAN_WIDTH_40:
2597                 c->width = NL80211_CHAN_WIDTH_20;
2598                 c->center_freq1 = c->chan->center_freq;
2599                 ret = IEEE80211_STA_DISABLE_40MHZ |
2600                       IEEE80211_STA_DISABLE_VHT;
2601                 break;
2602         case NL80211_CHAN_WIDTH_80:
2603                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2604                 /* n_P40 */
2605                 tmp /= 2;
2606                 /* freq_P40 */
2607                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2608                 c->width = NL80211_CHAN_WIDTH_40;
2609                 ret = IEEE80211_STA_DISABLE_VHT;
2610                 break;
2611         case NL80211_CHAN_WIDTH_80P80:
2612                 c->center_freq2 = 0;
2613                 c->width = NL80211_CHAN_WIDTH_80;
2614                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2615                       IEEE80211_STA_DISABLE_160MHZ;
2616                 break;
2617         case NL80211_CHAN_WIDTH_160:
2618                 /* n_P20 */
2619                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2620                 /* n_P80 */
2621                 tmp /= 4;
2622                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2623                 c->width = NL80211_CHAN_WIDTH_80;
2624                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2625                       IEEE80211_STA_DISABLE_160MHZ;
2626                 break;
2627         default:
2628         case NL80211_CHAN_WIDTH_20_NOHT:
2629                 WARN_ON_ONCE(1);
2630                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2631                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2632                 break;
2633         case NL80211_CHAN_WIDTH_5:
2634         case NL80211_CHAN_WIDTH_10:
2635                 WARN_ON_ONCE(1);
2636                 /* keep c->width */
2637                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2638                 break;
2639         }
2640
2641         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2642
2643         return ret;
2644 }
2645
2646 /*
2647  * Returns true if smps_mode_new is strictly more restrictive than
2648  * smps_mode_old.
2649  */
2650 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2651                                    enum ieee80211_smps_mode smps_mode_new)
2652 {
2653         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2654                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2655                 return false;
2656
2657         switch (smps_mode_old) {
2658         case IEEE80211_SMPS_STATIC:
2659                 return false;
2660         case IEEE80211_SMPS_DYNAMIC:
2661                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2662         case IEEE80211_SMPS_OFF:
2663                 return smps_mode_new != IEEE80211_SMPS_OFF;
2664         default:
2665                 WARN_ON(1);
2666         }
2667
2668         return false;
2669 }
2670
2671 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2672                               struct cfg80211_csa_settings *csa_settings)
2673 {
2674         struct sk_buff *skb;
2675         struct ieee80211_mgmt *mgmt;
2676         struct ieee80211_local *local = sdata->local;
2677         int freq;
2678         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2679                                sizeof(mgmt->u.action.u.chan_switch);
2680         u8 *pos;
2681
2682         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2683             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2684                 return -EOPNOTSUPP;
2685
2686         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2687                             5 + /* channel switch announcement element */
2688                             3 + /* secondary channel offset element */
2689                             8); /* mesh channel switch parameters element */
2690         if (!skb)
2691                 return -ENOMEM;
2692
2693         skb_reserve(skb, local->tx_headroom);
2694         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2695         memset(mgmt, 0, hdr_len);
2696         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2697                                           IEEE80211_STYPE_ACTION);
2698
2699         eth_broadcast_addr(mgmt->da);
2700         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2701         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2702                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2703         } else {
2704                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2705                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2706         }
2707         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2708         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2709         pos = skb_put(skb, 5);
2710         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2711         *pos++ = 3;                                             /* IE length */
2712         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2713         freq = csa_settings->chandef.chan->center_freq;
2714         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2715         *pos++ = csa_settings->count;                           /* count */
2716
2717         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2718                 enum nl80211_channel_type ch_type;
2719
2720                 skb_put(skb, 3);
2721                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2722                 *pos++ = 1;                                     /* IE length */
2723                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2724                 if (ch_type == NL80211_CHAN_HT40PLUS)
2725                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2726                 else
2727                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2728         }
2729
2730         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2731                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2732
2733                 skb_put(skb, 8);
2734                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2735                 *pos++ = 6;                                     /* IE length */
2736                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2737                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2738                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2739                 *pos++ |= csa_settings->block_tx ?
2740                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2741                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2742                 pos += 2;
2743                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2744                 pos += 2;
2745         }
2746
2747         ieee80211_tx_skb(sdata, skb);
2748         return 0;
2749 }
2750
2751 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2752 {
2753         return !(cs == NULL || cs->cipher == 0 ||
2754                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2755                  cs->hdr_len <= cs->key_idx_off ||
2756                  cs->key_idx_shift > 7 ||
2757                  cs->key_idx_mask == 0);
2758 }
2759
2760 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2761 {
2762         int i;
2763
2764         /* Ensure we have enough iftype bitmap space for all iftype values */
2765         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2766
2767         for (i = 0; i < n; i++)
2768                 if (!ieee80211_cs_valid(&cs[i]))
2769                         return false;
2770
2771         return true;
2772 }
2773
2774 const struct ieee80211_cipher_scheme *
2775 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2776                  enum nl80211_iftype iftype)
2777 {
2778         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2779         int n = local->hw.n_cipher_schemes;
2780         int i;
2781         const struct ieee80211_cipher_scheme *cs = NULL;
2782
2783         for (i = 0; i < n; i++) {
2784                 if (l[i].cipher == cipher) {
2785                         cs = &l[i];
2786                         break;
2787                 }
2788         }
2789
2790         if (!cs || !(cs->iftype & BIT(iftype)))
2791                 return NULL;
2792
2793         return cs;
2794 }
2795
2796 int ieee80211_cs_headroom(struct ieee80211_local *local,
2797                           struct cfg80211_crypto_settings *crypto,
2798                           enum nl80211_iftype iftype)
2799 {
2800         const struct ieee80211_cipher_scheme *cs;
2801         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2802         int i;
2803
2804         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2805                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2806                                       iftype);
2807
2808                 if (cs && headroom < cs->hdr_len)
2809                         headroom = cs->hdr_len;
2810         }
2811
2812         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2813         if (cs && headroom < cs->hdr_len)
2814                 headroom = cs->hdr_len;
2815
2816         return headroom;
2817 }
2818
2819 static bool
2820 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2821 {
2822         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2823         int skip;
2824
2825         if (end > 0)
2826                 return false;
2827
2828         /* End time is in the past, check for repetitions */
2829         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2830         if (data->count[i] < 255) {
2831                 if (data->count[i] <= skip) {
2832                         data->count[i] = 0;
2833                         return false;
2834                 }
2835
2836                 data->count[i] -= skip;
2837         }
2838
2839         data->desc[i].start += skip * data->desc[i].interval;
2840
2841         return true;
2842 }
2843
2844 static bool
2845 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2846                              s32 *offset)
2847 {
2848         bool ret = false;
2849         int i;
2850
2851         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2852                 s32 cur;
2853
2854                 if (!data->count[i])
2855                         continue;
2856
2857                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2858                         ret = true;
2859
2860                 cur = data->desc[i].start - tsf;
2861                 if (cur > *offset)
2862                         continue;
2863
2864                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2865                 if (cur > *offset)
2866                         *offset = cur;
2867         }
2868
2869         return ret;
2870 }
2871
2872 static u32
2873 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2874 {
2875         s32 offset = 0;
2876         int tries = 0;
2877         /*
2878          * arbitrary limit, used to avoid infinite loops when combined NoA
2879          * descriptors cover the full time period.
2880          */
2881         int max_tries = 5;
2882
2883         ieee80211_extend_absent_time(data, tsf, &offset);
2884         do {
2885                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2886                         break;
2887
2888                 tries++;
2889         } while (tries < max_tries);
2890
2891         return offset;
2892 }
2893
2894 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2895 {
2896         u32 next_offset = BIT(31) - 1;
2897         int i;
2898
2899         data->absent = 0;
2900         data->has_next_tsf = false;
2901         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2902                 s32 start;
2903
2904                 if (!data->count[i])
2905                         continue;
2906
2907                 ieee80211_extend_noa_desc(data, tsf, i);
2908                 start = data->desc[i].start - tsf;
2909                 if (start <= 0)
2910                         data->absent |= BIT(i);
2911
2912                 if (next_offset > start)
2913                         next_offset = start;
2914
2915                 data->has_next_tsf = true;
2916         }
2917
2918         if (data->absent)
2919                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2920
2921         data->next_tsf = tsf + next_offset;
2922 }
2923 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2924
2925 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2926                             struct ieee80211_noa_data *data, u32 tsf)
2927 {
2928         int ret = 0;
2929         int i;
2930
2931         memset(data, 0, sizeof(*data));
2932
2933         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2934                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2935
2936                 if (!desc->count || !desc->duration)
2937                         continue;
2938
2939                 data->count[i] = desc->count;
2940                 data->desc[i].start = le32_to_cpu(desc->start_time);
2941                 data->desc[i].duration = le32_to_cpu(desc->duration);
2942                 data->desc[i].interval = le32_to_cpu(desc->interval);
2943
2944                 if (data->count[i] > 1 &&
2945                     data->desc[i].interval < data->desc[i].duration)
2946                         continue;
2947
2948                 ieee80211_extend_noa_desc(data, tsf, i);
2949                 ret++;
2950         }
2951
2952         if (ret)
2953                 ieee80211_update_p2p_noa(data, tsf);
2954
2955         return ret;
2956 }
2957 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
2958
2959 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2960                            struct ieee80211_sub_if_data *sdata)
2961 {
2962         u64 tsf = drv_get_tsf(local, sdata);
2963         u64 dtim_count = 0;
2964         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
2965         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
2966         struct ps_data *ps;
2967         u8 bcns_from_dtim;
2968
2969         if (tsf == -1ULL || !beacon_int || !dtim_period)
2970                 return;
2971
2972         if (sdata->vif.type == NL80211_IFTYPE_AP ||
2973             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
2974                 if (!sdata->bss)
2975                         return;
2976
2977                 ps = &sdata->bss->ps;
2978         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2979                 ps = &sdata->u.mesh.ps;
2980         } else {
2981                 return;
2982         }
2983
2984         /*
2985          * actually finds last dtim_count, mac80211 will update in
2986          * __beacon_add_tim().
2987          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
2988          */
2989         do_div(tsf, beacon_int);
2990         bcns_from_dtim = do_div(tsf, dtim_period);
2991         /* just had a DTIM */
2992         if (!bcns_from_dtim)
2993                 dtim_count = 0;
2994         else
2995                 dtim_count = dtim_period - bcns_from_dtim;
2996
2997         ps->dtim_count = dtim_count;
2998 }
2999
3000 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3001                                          struct ieee80211_chanctx *ctx)
3002 {
3003         struct ieee80211_sub_if_data *sdata;
3004         u8 radar_detect = 0;
3005
3006         lockdep_assert_held(&local->chanctx_mtx);
3007
3008         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3009                 return 0;
3010
3011         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3012                 if (sdata->reserved_radar_required)
3013                         radar_detect |= BIT(sdata->reserved_chandef.width);
3014
3015         /*
3016          * An in-place reservation context should not have any assigned vifs
3017          * until it replaces the other context.
3018          */
3019         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3020                 !list_empty(&ctx->assigned_vifs));
3021
3022         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3023                 if (sdata->radar_required)
3024                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3025
3026         return radar_detect;
3027 }
3028
3029 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3030                                  const struct cfg80211_chan_def *chandef,
3031                                  enum ieee80211_chanctx_mode chanmode,
3032                                  u8 radar_detect)
3033 {
3034         struct ieee80211_local *local = sdata->local;
3035         struct ieee80211_sub_if_data *sdata_iter;
3036         enum nl80211_iftype iftype = sdata->wdev.iftype;
3037         int num[NUM_NL80211_IFTYPES];
3038         struct ieee80211_chanctx *ctx;
3039         int num_different_channels = 0;
3040         int total = 1;
3041
3042         lockdep_assert_held(&local->chanctx_mtx);
3043
3044         if (WARN_ON(hweight32(radar_detect) > 1))
3045                 return -EINVAL;
3046
3047         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3048                     !chandef->chan))
3049                 return -EINVAL;
3050
3051         if (chandef)
3052                 num_different_channels = 1;
3053
3054         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3055                 return -EINVAL;
3056
3057         /* Always allow software iftypes */
3058         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3059                 if (radar_detect)
3060                         return -EINVAL;
3061                 return 0;
3062         }
3063
3064         memset(num, 0, sizeof(num));
3065
3066         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3067                 num[iftype] = 1;
3068
3069         list_for_each_entry(ctx, &local->chanctx_list, list) {
3070                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3071                         continue;
3072                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3073                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3074                         num_different_channels++;
3075                         continue;
3076                 }
3077                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3078                     cfg80211_chandef_compatible(chandef,
3079                                                 &ctx->conf.def))
3080                         continue;
3081                 num_different_channels++;
3082         }
3083
3084         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3085                 struct wireless_dev *wdev_iter;
3086
3087                 wdev_iter = &sdata_iter->wdev;
3088
3089                 if (sdata_iter == sdata ||
3090                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3091                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3092                         continue;
3093
3094                 num[wdev_iter->iftype]++;
3095                 total++;
3096         }
3097
3098         if (total == 1 && !radar_detect)
3099                 return 0;
3100
3101         return cfg80211_check_combinations(local->hw.wiphy,
3102                                            num_different_channels,
3103                                            radar_detect, num);
3104 }
3105
3106 static void
3107 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3108                          void *data)
3109 {
3110         u32 *max_num_different_channels = data;
3111
3112         *max_num_different_channels = max(*max_num_different_channels,
3113                                           c->num_different_channels);
3114 }
3115
3116 int ieee80211_max_num_channels(struct ieee80211_local *local)
3117 {
3118         struct ieee80211_sub_if_data *sdata;
3119         int num[NUM_NL80211_IFTYPES] = {};
3120         struct ieee80211_chanctx *ctx;
3121         int num_different_channels = 0;
3122         u8 radar_detect = 0;
3123         u32 max_num_different_channels = 1;
3124         int err;
3125
3126         lockdep_assert_held(&local->chanctx_mtx);
3127
3128         list_for_each_entry(ctx, &local->chanctx_list, list) {
3129                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3130                         continue;
3131
3132                 num_different_channels++;
3133
3134                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3135         }
3136
3137         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3138                 num[sdata->wdev.iftype]++;
3139
3140         err = cfg80211_iter_combinations(local->hw.wiphy,
3141                                          num_different_channels, radar_detect,
3142                                          num, ieee80211_iter_max_chans,
3143                                          &max_num_different_channels);
3144         if (err < 0)
3145                 return err;
3146
3147         return max_num_different_channels;
3148 }
3149
3150 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3151 {
3152         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3153         *buf++ = 7; /* len */
3154         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3155         *buf++ = 0x50;
3156         *buf++ = 0xf2;
3157         *buf++ = 2; /* WME */
3158         *buf++ = 0; /* WME info */
3159         *buf++ = 1; /* WME ver */
3160         *buf++ = qosinfo; /* U-APSD no in use */
3161
3162         return buf;
3163 }