net/mac80211/util.c

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005-2006, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2014  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * utilities for mac80211
  13  */
  14
  15 #include <net/mac80211.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/export.h>
  18 #include <linux/types.h>
  19 #include <linux/slab.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/bitmap.h>
  24 #include <linux/crc32.h>
  25 #include <net/net_namespace.h>
  26 #include <net/cfg80211.h>
  27 #include <net/rtnetlink.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43         BUG_ON(!wiphy);
  44
  45         local = wiphy_priv(wiphy);
  46         return &local->hw;
  47 }
  48 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  49
  50 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  51                         enum nl80211_iftype type)
  52 {
  53         __le16 fc = hdr->frame_control;
  54
  55          /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
  56         if (len < 16)
  57                 return NULL;
  58
  59         if (ieee80211_is_data(fc)) {
  60                 if (len < 24) /* drop incorrect hdr len (data) */
  61                         return NULL;
  62
  63                 if (ieee80211_has_a4(fc))
  64                         return NULL;
  65                 if (ieee80211_has_tods(fc))
  66                         return hdr->addr1;
  67                 if (ieee80211_has_fromds(fc))
  68                         return hdr->addr2;
  69
  70                 return hdr->addr3;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98
  99 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 100 {
 101         struct sk_buff *skb;
 102         struct ieee80211_hdr *hdr;
 103
 104         skb_queue_walk(&tx->skbs, skb) {
 105                 hdr = (struct ieee80211_hdr *) skb->data;
 106                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 107         }
 108 }
 109
 110 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
 111                              int rate, int erp, int short_preamble,
 112                              int shift)
 113 {
 114         int dur;
 115
 116         /* calculate duration (in microseconds, rounded up to next higher
 117          * integer if it includes a fractional microsecond) to send frame of
 118          * len bytes (does not include FCS) at the given rate. Duration will
 119          * also include SIFS.
 120          *
 121          * rate is in 100 kbps, so divident is multiplied by 10 in the
 122          * DIV_ROUND_UP() operations.
 123          *
 124          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 125          * is assumed to be 0 otherwise.
 126          */
 127
 128         if (band == IEEE80211_BAND_5GHZ || erp) {
 129                 /*
 130                  * OFDM:
 131                  *
 132                  * N_DBPS = DATARATE x 4
 133                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 134                  *      (16 = SIGNAL time, 6 = tail bits)
 135                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 136                  *
 137                  * T_SYM = 4 usec
 138                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 139                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 140                  *      signal ext = 6 usec
 141                  */
 142                 dur = 16; /* SIFS + signal ext */
 143                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 144                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 145
 146                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 147                  *  * times 4 for 5 MHz
 148                  *  * times 2 for 10 MHz
 149                  */
 150                 dur *= 1 << shift;
 151
 152                 /* rates should already consider the channel bandwidth,
 153                  * don't apply divisor again.
 154                  */
 155                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 156                                         4 * rate); /* T_SYM x N_SYM */
 157         } else {
 158                 /*
 159                  * 802.11b or 802.11g with 802.11b compatibility:
 160                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 161                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 162                  *
 163                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 164                  * aSIFSTime = 10 usec
 165                  * aPreambleLength = 144 usec or 72 usec with short preamble
 166                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 167                  */
 168                 dur = 10; /* aSIFSTime = 10 usec */
 169                 dur += short_preamble ? (72 + 24) : (144 + 48);
 170
 171                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 172         }
 173
 174         return dur;
 175 }
 176
 177 /* Exported duration function for driver use */
 178 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 179                                         struct ieee80211_vif *vif,
 180                                         enum ieee80211_band band,
 181                                         size_t frame_len,
 182                                         struct ieee80211_rate *rate)
 183 {
 184         struct ieee80211_sub_if_data *sdata;
 185         u16 dur;
 186         int erp, shift = 0;
 187         bool short_preamble = false;
 188
 189         erp = 0;
 190         if (vif) {
 191                 sdata = vif_to_sdata(vif);
 192                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 193                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 194                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 195                 shift = ieee80211_vif_get_shift(vif);
 196         }
 197
 198         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 199                                        short_preamble, shift);
 200
 201         return cpu_to_le16(dur);
 202 }
 203 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 204
 205 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 206                               struct ieee80211_vif *vif, size_t frame_len,
 207                               const struct ieee80211_tx_info *frame_txctl)
 208 {
 209         struct ieee80211_local *local = hw_to_local(hw);
 210         struct ieee80211_rate *rate;
 211         struct ieee80211_sub_if_data *sdata;
 212         bool short_preamble;
 213         int erp, shift = 0, bitrate;
 214         u16 dur;
 215         struct ieee80211_supported_band *sband;
 216
 217         sband = local->hw.wiphy->bands[frame_txctl->band];
 218
 219         short_preamble = false;
 220
 221         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 222
 223         erp = 0;
 224         if (vif) {
 225                 sdata = vif_to_sdata(vif);
 226                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 227                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 228                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 229                 shift = ieee80211_vif_get_shift(vif);
 230         }
 231
 232         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 233
 234         /* CTS duration */
 235         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                        erp, short_preamble, shift);
 237         /* Data frame duration */
 238         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 239                                         erp, short_preamble, shift);
 240         /* ACK duration */
 241         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 242                                         erp, short_preamble, shift);
 243
 244         return cpu_to_le16(dur);
 245 }
 246 EXPORT_SYMBOL(ieee80211_rts_duration);
 247
 248 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 249                                     struct ieee80211_vif *vif,
 250                                     size_t frame_len,
 251                                     const struct ieee80211_tx_info *frame_txctl)
 252 {
 253         struct ieee80211_local *local = hw_to_local(hw);
 254         struct ieee80211_rate *rate;
 255         struct ieee80211_sub_if_data *sdata;
 256         bool short_preamble;
 257         int erp, shift = 0, bitrate;
 258         u16 dur;
 259         struct ieee80211_supported_band *sband;
 260
 261         sband = local->hw.wiphy->bands[frame_txctl->band];
 262
 263         short_preamble = false;
 264
 265         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 266         erp = 0;
 267         if (vif) {
 268                 sdata = vif_to_sdata(vif);
 269                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 270                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 271                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 272                 shift = ieee80211_vif_get_shift(vif);
 273         }
 274
 275         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 276
 277         /* Data frame duration */
 278         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 279                                        erp, short_preamble, shift);
 280         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 281                 /* ACK duration */
 282                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 283                                                 erp, short_preamble, shift);
 284         }
 285
 286         return cpu_to_le16(dur);
 287 }
 288 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 289
 290 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 291 {
 292         struct ieee80211_sub_if_data *sdata;
 293         int n_acs = IEEE80211_NUM_ACS;
 294
 295         if (local->hw.queues < IEEE80211_NUM_ACS)
 296                 n_acs = 1;
 297
 298         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 299                 int ac;
 300
 301                 if (!sdata->dev)
 302                         continue;
 303
 304                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 305                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 306                         continue;
 307
 308                 for (ac = 0; ac < n_acs; ac++) {
 309                         int ac_queue = sdata->vif.hw_queue[ac];
 310
 311                         if (ac_queue == queue ||
 312                             (sdata->vif.cab_queue == queue &&
 313                              local->queue_stop_reasons[ac_queue] == 0 &&
 314                              skb_queue_empty(&local->pending[ac_queue])))
 315                                 netif_wake_subqueue(sdata->dev, ac);
 316                 }
 317         }
 318 }
 319
 320 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 321                                    enum queue_stop_reason reason,
 322                                    bool refcounted)
 323 {
 324         struct ieee80211_local *local = hw_to_local(hw);
 325
 326         trace_wake_queue(local, queue, reason);
 327
 328         if (WARN_ON(queue >= hw->queues))
 329                 return;
 330
 331         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 332                 return;
 333
 334         if (!refcounted)
 335                 local->q_stop_reasons[queue][reason] = 0;
 336         else
 337                 local->q_stop_reasons[queue][reason]--;
 338
 339         if (local->q_stop_reasons[queue][reason] == 0)
 340                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 341
 342         if (local->queue_stop_reasons[queue] != 0)
 343                 /* someone still has this queue stopped */
 344                 return;
 345
 346         if (skb_queue_empty(&local->pending[queue])) {
 347                 rcu_read_lock();
 348                 ieee80211_propagate_queue_wake(local, queue);
 349                 rcu_read_unlock();
 350         } else
 351                 tasklet_schedule(&local->tx_pending_tasklet);
 352 }
 353
 354 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 355                                     enum queue_stop_reason reason,
 356                                     bool refcounted)
 357 {
 358         struct ieee80211_local *local = hw_to_local(hw);
 359         unsigned long flags;
 360
 361         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 362         __ieee80211_wake_queue(hw, queue, reason, refcounted);
 363         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 364 }
 365
 366 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 367 {
 368         ieee80211_wake_queue_by_reason(hw, queue,
 369                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 370                                        false);
 371 }
 372 EXPORT_SYMBOL(ieee80211_wake_queue);
 373
 374 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 375                                    enum queue_stop_reason reason,
 376                                    bool refcounted)
 377 {
 378         struct ieee80211_local *local = hw_to_local(hw);
 379         struct ieee80211_sub_if_data *sdata;
 380         int n_acs = IEEE80211_NUM_ACS;
 381
 382         trace_stop_queue(local, queue, reason);
 383
 384         if (WARN_ON(queue >= hw->queues))
 385                 return;
 386
 387         if (!refcounted)
 388                 local->q_stop_reasons[queue][reason] = 1;
 389         else
 390                 local->q_stop_reasons[queue][reason]++;
 391
 392         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (local->hw.queues < IEEE80211_NUM_ACS)
 396                 n_acs = 1;
 397
 398         rcu_read_lock();
 399         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 400                 int ac;
 401
 402                 if (!sdata->dev)
 403                         continue;
 404
 405                 for (ac = 0; ac < n_acs; ac++) {
 406                         if (sdata->vif.hw_queue[ac] == queue ||
 407                             sdata->vif.cab_queue == queue)
 408                                 netif_stop_subqueue(sdata->dev, ac);
 409                 }
 410         }
 411         rcu_read_unlock();
 412 }
 413
 414 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 415                                     enum queue_stop_reason reason,
 416                                     bool refcounted)
 417 {
 418         struct ieee80211_local *local = hw_to_local(hw);
 419         unsigned long flags;
 420
 421         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 422         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 423         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 424 }
 425
 426 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 427 {
 428         ieee80211_stop_queue_by_reason(hw, queue,
 429                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 430                                        false);
 431 }
 432 EXPORT_SYMBOL(ieee80211_stop_queue);
 433
 434 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 435                                struct sk_buff *skb)
 436 {
 437         struct ieee80211_hw *hw = &local->hw;
 438         unsigned long flags;
 439         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 440         int queue = info->hw_queue;
 441
 442         if (WARN_ON(!info->control.vif)) {
 443                 ieee80211_free_txskb(&local->hw, skb);
 444                 return;
 445         }
 446
 447         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 448         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 449                                false);
 450         __skb_queue_tail(&local->pending[queue], skb);
 451         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 452                                false);
 453         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 454 }
 455
 456 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 457                                 struct sk_buff_head *skbs)
 458 {
 459         struct ieee80211_hw *hw = &local->hw;
 460         struct sk_buff *skb;
 461         unsigned long flags;
 462         int queue, i;
 463
 464         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 465         while ((skb = skb_dequeue(skbs))) {
 466                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 467
 468                 if (WARN_ON(!info->control.vif)) {
 469                         ieee80211_free_txskb(&local->hw, skb);
 470                         continue;
 471                 }
 472
 473                 queue = info->hw_queue;
 474
 475                 __ieee80211_stop_queue(hw, queue,
 476                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 477                                 false);
 478
 479                 __skb_queue_tail(&local->pending[queue], skb);
 480         }
 481
 482         for (i = 0; i < hw->queues; i++)
 483                 __ieee80211_wake_queue(hw, i,
 484                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 485                         false);
 486         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 487 }
 488
 489 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 490                                      unsigned long queues,
 491                                      enum queue_stop_reason reason,
 492                                      bool refcounted)
 493 {
 494         struct ieee80211_local *local = hw_to_local(hw);
 495         unsigned long flags;
 496         int i;
 497
 498         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 499
 500         for_each_set_bit(i, &queues, hw->queues)
 501                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 502
 503         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 504 }
 505
 506 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 507 {
 508         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 509                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 510                                         false);
 511 }
 512 EXPORT_SYMBOL(ieee80211_stop_queues);
 513
 514 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 515 {
 516         struct ieee80211_local *local = hw_to_local(hw);
 517         unsigned long flags;
 518         int ret;
 519
 520         if (WARN_ON(queue >= hw->queues))
 521                 return true;
 522
 523         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 524         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 525                        &local->queue_stop_reasons[queue]);
 526         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 527         return ret;
 528 }
 529 EXPORT_SYMBOL(ieee80211_queue_stopped);
 530
 531 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 532                                      unsigned long queues,
 533                                      enum queue_stop_reason reason,
 534                                      bool refcounted)
 535 {
 536         struct ieee80211_local *local = hw_to_local(hw);
 537         unsigned long flags;
 538         int i;
 539
 540         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 541
 542         for_each_set_bit(i, &queues, hw->queues)
 543                 __ieee80211_wake_queue(hw, i, reason, refcounted);
 544
 545         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 546 }
 547
 548 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 549 {
 550         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 551                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 552                                         false);
 553 }
 554 EXPORT_SYMBOL(ieee80211_wake_queues);
 555
 556 static unsigned int
 557 ieee80211_get_vif_queues(struct ieee80211_local *local,
 558                          struct ieee80211_sub_if_data *sdata)
 559 {
 560         unsigned int queues;
 561
 562         if (sdata && local->hw.flags & IEEE80211_HW_QUEUE_CONTROL) {
 563                 int ac;
 564
 565                 queues = 0;
 566
 567                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 568                         queues |= BIT(sdata->vif.hw_queue[ac]);
 569                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 570                         queues |= BIT(sdata->vif.cab_queue);
 571         } else {
 572                 /* all queues */
 573                 queues = BIT(local->hw.queues) - 1;
 574         }
 575
 576         return queues;
 577 }
 578
 579 void __ieee80211_flush_queues(struct ieee80211_local *local,
 580                               struct ieee80211_sub_if_data *sdata,
 581                               unsigned int queues)
 582 {
 583         if (!local->ops->flush)
 584                 return;
 585
 586         /*
 587          * If no queue was set, or if the HW doesn't support
 588          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 589          */
 590         if (!queues || !(local->hw.flags & IEEE80211_HW_QUEUE_CONTROL))
 591                 queues = ieee80211_get_vif_queues(local, sdata);
 592
 593         ieee80211_stop_queues_by_reason(&local->hw, queues,
 594                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 595                                         false);
 596
 597         drv_flush(local, sdata, queues, false);
 598
 599         ieee80211_wake_queues_by_reason(&local->hw, queues,
 600                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 601                                         false);
 602 }
 603
 604 void ieee80211_flush_queues(struct ieee80211_local *local,
 605                             struct ieee80211_sub_if_data *sdata)
 606 {
 607         __ieee80211_flush_queues(local, sdata, 0);
 608 }
 609
 610 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 611                                struct ieee80211_sub_if_data *sdata,
 612                                enum queue_stop_reason reason)
 613 {
 614         ieee80211_stop_queues_by_reason(&local->hw,
 615                                         ieee80211_get_vif_queues(local, sdata),
 616                                         reason, true);
 617 }
 618
 619 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 620                                struct ieee80211_sub_if_data *sdata,
 621                                enum queue_stop_reason reason)
 622 {
 623         ieee80211_wake_queues_by_reason(&local->hw,
 624                                         ieee80211_get_vif_queues(local, sdata),
 625                                         reason, true);
 626 }
 627
 628 static void __iterate_active_interfaces(struct ieee80211_local *local,
 629                                         u32 iter_flags,
 630                                         void (*iterator)(void *data, u8 *mac,
 631                                                 struct ieee80211_vif *vif),
 632                                         void *data)
 633 {
 634         struct ieee80211_sub_if_data *sdata;
 635
 636         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 637                 switch (sdata->vif.type) {
 638                 case NL80211_IFTYPE_MONITOR:
 639                         if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
 640                                 continue;
 641                         break;
 642                 case NL80211_IFTYPE_AP_VLAN:
 643                         continue;
 644                 default:
 645                         break;
 646                 }
 647                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 648                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 649                         continue;
 650                 if (ieee80211_sdata_running(sdata))
 651                         iterator(data, sdata->vif.addr,
 652                                  &sdata->vif);
 653         }
 654
 655         sdata = rcu_dereference_check(local->monitor_sdata,
 656                                       lockdep_is_held(&local->iflist_mtx) ||
 657                                       lockdep_rtnl_is_held());
 658         if (sdata &&
 659             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL ||
 660              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 661                 iterator(data, sdata->vif.addr, &sdata->vif);
 662 }
 663
 664 void ieee80211_iterate_active_interfaces(
 665         struct ieee80211_hw *hw, u32 iter_flags,
 666         void (*iterator)(void *data, u8 *mac,
 667                          struct ieee80211_vif *vif),
 668         void *data)
 669 {
 670         struct ieee80211_local *local = hw_to_local(hw);
 671
 672         mutex_lock(&local->iflist_mtx);
 673         __iterate_active_interfaces(local, iter_flags, iterator, data);
 674         mutex_unlock(&local->iflist_mtx);
 675 }
 676 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);
 677
 678 void ieee80211_iterate_active_interfaces_atomic(
 679         struct ieee80211_hw *hw, u32 iter_flags,
 680         void (*iterator)(void *data, u8 *mac,
 681                          struct ieee80211_vif *vif),
 682         void *data)
 683 {
 684         struct ieee80211_local *local = hw_to_local(hw);
 685
 686         rcu_read_lock();
 687         __iterate_active_interfaces(local, iter_flags, iterator, data);
 688         rcu_read_unlock();
 689 }
 690 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 691
 692 void ieee80211_iterate_active_interfaces_rtnl(
 693         struct ieee80211_hw *hw, u32 iter_flags,
 694         void (*iterator)(void *data, u8 *mac,
 695                          struct ieee80211_vif *vif),
 696         void *data)
 697 {
 698         struct ieee80211_local *local = hw_to_local(hw);
 699
 700         ASSERT_RTNL();
 701
 702         __iterate_active_interfaces(local, iter_flags, iterator, data);
 703 }
 704 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 705
 706 static void __iterate_stations(struct ieee80211_local *local,
 707                                void (*iterator)(void *data,
 708                                                 struct ieee80211_sta *sta),
 709                                void *data)
 710 {
 711         struct sta_info *sta;
 712
 713         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 714                 if (!sta->uploaded)
 715                         continue;
 716
 717                 iterator(data, &sta->sta);
 718         }
 719 }
 720
 721 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 722                         void (*iterator)(void *data,
 723                                          struct ieee80211_sta *sta),
 724                         void *data)
 725 {
 726         struct ieee80211_local *local = hw_to_local(hw);
 727
 728         rcu_read_lock();
 729         __iterate_stations(local, iterator, data);
 730         rcu_read_unlock();
 731 }
 732 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 733
 734 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 735 {
 736         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 737
 738         if (!ieee80211_sdata_running(sdata) ||
 739             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 740                 return NULL;
 741         return &sdata->vif;
 742 }
 743 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 744
 745 /*
 746  * Nothing should have been stuffed into the workqueue during
 747  * the suspend->resume cycle. If this WARN is seen then there
 748  * is a bug with either the driver suspend or something in
 749  * mac80211 stuffing into the workqueue which we haven't yet
 750  * cleared during mac80211's suspend cycle.
 751  */
 752 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 753 {
 754         if (WARN(local->suspended && !local->resuming,
 755                  "queueing ieee80211 work while going to suspend\n"))
 756                 return false;
 757
 758         return true;
 759 }
 760
 761 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 762 {
 763         struct ieee80211_local *local = hw_to_local(hw);
 764
 765         if (!ieee80211_can_queue_work(local))
 766                 return;
 767
 768         queue_work(local->workqueue, work);
 769 }
 770 EXPORT_SYMBOL(ieee80211_queue_work);
 771
 772 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 773                                   struct delayed_work *dwork,
 774                                   unsigned long delay)
 775 {
 776         struct ieee80211_local *local = hw_to_local(hw);
 777
 778         if (!ieee80211_can_queue_work(local))
 779                 return;
 780
 781         queue_delayed_work(local->workqueue, dwork, delay);
 782 }
 783 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 784
 785 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 786                                struct ieee802_11_elems *elems,
 787                                u64 filter, u32 crc)
 788 {
 789         size_t left = len;
 790         const u8 *pos = start;
 791         bool calc_crc = filter != 0;
 792         DECLARE_BITMAP(seen_elems, 256);
 793         const u8 *ie;
 794
 795         bitmap_zero(seen_elems, 256);
 796         memset(elems, 0, sizeof(*elems));
 797         elems->ie_start = start;
 798         elems->total_len = len;
 799
 800         while (left >= 2) {
 801                 u8 id, elen;
 802                 bool elem_parse_failed;
 803
 804                 id = *pos++;
 805                 elen = *pos++;
 806                 left -= 2;
 807
 808                 if (elen > left) {
 809                         elems->parse_error = true;
 810                         break;
 811                 }
 812
 813                 switch (id) {
 814                 case WLAN_EID_SSID:
 815                 case WLAN_EID_SUPP_RATES:
 816                 case WLAN_EID_FH_PARAMS:
 817                 case WLAN_EID_DS_PARAMS:
 818                 case WLAN_EID_CF_PARAMS:
 819                 case WLAN_EID_TIM:
 820                 case WLAN_EID_IBSS_PARAMS:
 821                 case WLAN_EID_CHALLENGE:
 822                 case WLAN_EID_RSN:
 823                 case WLAN_EID_ERP_INFO:
 824                 case WLAN_EID_EXT_SUPP_RATES:
 825                 case WLAN_EID_HT_CAPABILITY:
 826                 case WLAN_EID_HT_OPERATION:
 827                 case WLAN_EID_VHT_CAPABILITY:
 828                 case WLAN_EID_VHT_OPERATION:
 829                 case WLAN_EID_MESH_ID:
 830                 case WLAN_EID_MESH_CONFIG:
 831                 case WLAN_EID_PEER_MGMT:
 832                 case WLAN_EID_PREQ:
 833                 case WLAN_EID_PREP:
 834                 case WLAN_EID_PERR:
 835                 case WLAN_EID_RANN:
 836                 case WLAN_EID_CHANNEL_SWITCH:
 837                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 838                 case WLAN_EID_COUNTRY:
 839                 case WLAN_EID_PWR_CONSTRAINT:
 840                 case WLAN_EID_TIMEOUT_INTERVAL:
 841                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 842                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 843                 case WLAN_EID_CHAN_SWITCH_PARAM:
 844                 case WLAN_EID_EXT_CAPABILITY:
 845                 case WLAN_EID_CHAN_SWITCH_TIMING:
 846                 case WLAN_EID_LINK_ID:
 847                 /*
 848                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 849                  * that if the content gets bigger it might be needed more than once
 850                  */
 851                         if (test_bit(id, seen_elems)) {
 852                                 elems->parse_error = true;
 853                                 left -= elen;
 854                                 pos += elen;
 855                                 continue;
 856                         }
 857                         break;
 858                 }
 859
 860                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 861                         crc = crc32_be(crc, pos - 2, elen + 2);
 862
 863                 elem_parse_failed = false;
 864
 865                 switch (id) {
 866                 case WLAN_EID_LINK_ID:
 867                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 868                                 elem_parse_failed = true;
 869                                 break;
 870                         }
 871                         elems->lnk_id = (void *)(pos - 2);
 872                         break;
 873                 case WLAN_EID_CHAN_SWITCH_TIMING:
 874                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 875                                 elem_parse_failed = true;
 876                                 break;
 877                         }
 878                         elems->ch_sw_timing = (void *)pos;
 879                         break;
 880                 case WLAN_EID_EXT_CAPABILITY:
 881                         elems->ext_capab = pos;
 882                         elems->ext_capab_len = elen;
 883                         break;
 884                 case WLAN_EID_SSID:
 885                         elems->ssid = pos;
 886                         elems->ssid_len = elen;
 887                         break;
 888                 case WLAN_EID_SUPP_RATES:
 889                         elems->supp_rates = pos;
 890                         elems->supp_rates_len = elen;
 891                         break;
 892                 case WLAN_EID_DS_PARAMS:
 893                         if (elen >= 1)
 894                                 elems->ds_params = pos;
 895                         else
 896                                 elem_parse_failed = true;
 897                         break;
 898                 case WLAN_EID_TIM:
 899                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 900                                 elems->tim = (void *)pos;
 901                                 elems->tim_len = elen;
 902                         } else
 903                                 elem_parse_failed = true;
 904                         break;
 905                 case WLAN_EID_CHALLENGE:
 906                         elems->challenge = pos;
 907                         elems->challenge_len = elen;
 908                         break;
 909                 case WLAN_EID_VENDOR_SPECIFIC:
 910                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 911                             pos[2] == 0xf2) {
 912                                 /* Microsoft OUI (00:50:F2) */
 913
 914                                 if (calc_crc)
 915                                         crc = crc32_be(crc, pos - 2, elen + 2);
 916
 917                                 if (elen >= 5 && pos[3] == 2) {
 918                                         /* OUI Type 2 - WMM IE */
 919                                         if (pos[4] == 0) {
 920                                                 elems->wmm_info = pos;
 921                                                 elems->wmm_info_len = elen;
 922                                         } else if (pos[4] == 1) {
 923                                                 elems->wmm_param = pos;
 924                                                 elems->wmm_param_len = elen;
 925                                         }
 926                                 }
 927                         }
 928                         break;
 929                 case WLAN_EID_RSN:
 930                         elems->rsn = pos;
 931                         elems->rsn_len = elen;
 932                         break;
 933                 case WLAN_EID_ERP_INFO:
 934                         if (elen >= 1)
 935                                 elems->erp_info = pos;
 936                         else
 937                                 elem_parse_failed = true;
 938                         break;
 939                 case WLAN_EID_EXT_SUPP_RATES:
 940                         elems->ext_supp_rates = pos;
 941                         elems->ext_supp_rates_len = elen;
 942                         break;
 943                 case WLAN_EID_HT_CAPABILITY:
 944                         if (elen >= sizeof(struct ieee80211_ht_cap))
 945                                 elems->ht_cap_elem = (void *)pos;
 946                         else
 947                                 elem_parse_failed = true;
 948                         break;
 949                 case WLAN_EID_HT_OPERATION:
 950                         if (elen >= sizeof(struct ieee80211_ht_operation))
 951                                 elems->ht_operation = (void *)pos;
 952                         else
 953                                 elem_parse_failed = true;
 954                         break;
 955                 case WLAN_EID_VHT_CAPABILITY:
 956                         if (elen >= sizeof(struct ieee80211_vht_cap))
 957                                 elems->vht_cap_elem = (void *)pos;
 958                         else
 959                                 elem_parse_failed = true;
 960                         break;
 961                 case WLAN_EID_VHT_OPERATION:
 962                         if (elen >= sizeof(struct ieee80211_vht_operation))
 963                                 elems->vht_operation = (void *)pos;
 964                         else
 965                                 elem_parse_failed = true;
 966                         break;
 967                 case WLAN_EID_OPMODE_NOTIF:
 968                         if (elen > 0)
 969                                 elems->opmode_notif = pos;
 970                         else
 971                                 elem_parse_failed = true;
 972                         break;
 973                 case WLAN_EID_MESH_ID:
 974                         elems->mesh_id = pos;
 975                         elems->mesh_id_len = elen;
 976                         break;
 977                 case WLAN_EID_MESH_CONFIG:
 978                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
 979                                 elems->mesh_config = (void *)pos;
 980                         else
 981                                 elem_parse_failed = true;
 982                         break;
 983                 case WLAN_EID_PEER_MGMT:
 984                         elems->peering = pos;
 985                         elems->peering_len = elen;
 986                         break;
 987                 case WLAN_EID_MESH_AWAKE_WINDOW:
 988                         if (elen >= 2)
 989                                 elems->awake_window = (void *)pos;
 990                         break;
 991                 case WLAN_EID_PREQ:
 992                         elems->preq = pos;
 993                         elems->preq_len = elen;
 994                         break;
 995                 case WLAN_EID_PREP:
 996                         elems->prep = pos;
 997                         elems->prep_len = elen;
 998                         break;
 999                 case WLAN_EID_PERR:
1000                         elems->perr = pos;
1001                         elems->perr_len = elen;
1002                         break;
1003                 case WLAN_EID_RANN:
1004                         if (elen >= sizeof(struct ieee80211_rann_ie))
1005                                 elems->rann = (void *)pos;
1006                         else
1007                                 elem_parse_failed = true;
1008                         break;
1009                 case WLAN_EID_CHANNEL_SWITCH:
1010                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1011                                 elem_parse_failed = true;
1012                                 break;
1013                         }
1014                         elems->ch_switch_ie = (void *)pos;
1015                         break;
1016                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1017                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1018                                 elem_parse_failed = true;
1019                                 break;
1020                         }
1021                         elems->ext_chansw_ie = (void *)pos;
1022                         break;
1023                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1024                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1025                                 elem_parse_failed = true;
1026                                 break;
1027                         }
1028                         elems->sec_chan_offs = (void *)pos;
1029                         break;
1030                 case WLAN_EID_CHAN_SWITCH_PARAM:
1031                         if (elen !=
1032                             sizeof(*elems->mesh_chansw_params_ie)) {
1033                                 elem_parse_failed = true;
1034                                 break;
1035                         }
1036                         elems->mesh_chansw_params_ie = (void *)pos;
1037                         break;
1038                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1039                         if (!action ||
1040                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1041                                 elem_parse_failed = true;
1042                                 break;
1043                         }
1044                         elems->wide_bw_chansw_ie = (void *)pos;
1045                         break;
1046                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1047                         if (action) {
1048                                 elem_parse_failed = true;
1049                                 break;
1050                         }
1051                         /*
1052                          * This is a bit tricky, but as we only care about
1053                          * the wide bandwidth channel switch element, so
1054                          * just parse it out manually.
1055                          */
1056                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1057                                               pos, elen);
1058                         if (ie) {
1059                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1060                                         elems->wide_bw_chansw_ie =
1061                                                 (void *)(ie + 2);
1062                                 else
1063                                         elem_parse_failed = true;
1064                         }
1065                         break;
1066                 case WLAN_EID_COUNTRY:
1067                         elems->country_elem = pos;
1068                         elems->country_elem_len = elen;
1069                         break;
1070                 case WLAN_EID_PWR_CONSTRAINT:
1071                         if (elen != 1) {
1072                                 elem_parse_failed = true;
1073                                 break;
1074                         }
1075                         elems->pwr_constr_elem = pos;
1076                         break;
1077                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1078                         /* Lots of different options exist, but we only care
1079                          * about the Dynamic Transmit Power Control element.
1080                          * First check for the Cisco OUI, then for the DTPC
1081                          * tag (0x00).
1082                          */
1083                         if (elen < 4) {
1084                                 elem_parse_failed = true;
1085                                 break;
1086                         }
1087
1088                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1089                             pos[2] != 0x96 || pos[3] != 0x00)
1090                                 break;
1091
1092                         if (elen != 6) {
1093                                 elem_parse_failed = true;
1094                                 break;
1095                         }
1096
1097                         if (calc_crc)
1098                                 crc = crc32_be(crc, pos - 2, elen + 2);
1099
1100                         elems->cisco_dtpc_elem = pos;
1101                         break;
1102                 case WLAN_EID_TIMEOUT_INTERVAL:
1103                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1104                                 elems->timeout_int = (void *)pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 default:
1109                         break;
1110                 }
1111
1112                 if (elem_parse_failed)
1113                         elems->parse_error = true;
1114                 else
1115                         __set_bit(id, seen_elems);
1116
1117                 left -= elen;
1118                 pos += elen;
1119         }
1120
1121         if (left != 0)
1122                 elems->parse_error = true;
1123
1124         return crc;
1125 }
1126
1127 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1128                                bool bss_notify)
1129 {
1130         struct ieee80211_local *local = sdata->local;
1131         struct ieee80211_tx_queue_params qparam;
1132         struct ieee80211_chanctx_conf *chanctx_conf;
1133         int ac;
1134         bool use_11b, enable_qos;
1135         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1136         int aCWmin, aCWmax;
1137
1138         if (!local->ops->conf_tx)
1139                 return;
1140
1141         if (local->hw.queues < IEEE80211_NUM_ACS)
1142                 return;
1143
1144         memset(&qparam, 0, sizeof(qparam));
1145
1146         rcu_read_lock();
1147         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1148         use_11b = (chanctx_conf &&
1149                    chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1150                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1151         rcu_read_unlock();
1152
1153         /*
1154          * By default disable QoS in STA mode for old access points, which do
1155          * not support 802.11e. New APs will provide proper queue parameters,
1156          * that we will configure later.
1157          */
1158         enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1159
1160         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1161
1162         /* Set defaults according to 802.11-2007 Table 7-37 */
1163         aCWmax = 1023;
1164         if (use_11b)
1165                 aCWmin = 31;
1166         else
1167                 aCWmin = 15;
1168
1169         /* Confiure old 802.11b/g medium access rules. */
1170         qparam.cw_max = aCWmax;
1171         qparam.cw_min = aCWmin;
1172         qparam.txop = 0;
1173         qparam.aifs = 2;
1174
1175         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1176                 /* Update if QoS is enabled. */
1177                 if (enable_qos) {
1178                         switch (ac) {
1179                         case IEEE80211_AC_BK:
1180                                 qparam.cw_max = aCWmax;
1181                                 qparam.cw_min = aCWmin;
1182                                 qparam.txop = 0;
1183                                 if (is_ocb)
1184                                         qparam.aifs = 9;
1185                                 else
1186                                         qparam.aifs = 7;
1187                                 break;
1188                         /* never happens but let's not leave undefined */
1189                         default:
1190                         case IEEE80211_AC_BE:
1191                                 qparam.cw_max = aCWmax;
1192                                 qparam.cw_min = aCWmin;
1193                                 qparam.txop = 0;
1194                                 if (is_ocb)
1195                                         qparam.aifs = 6;
1196                                 else
1197                                         qparam.aifs = 3;
1198                                 break;
1199                         case IEEE80211_AC_VI:
1200                                 qparam.cw_max = aCWmin;
1201                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1202                                 if (is_ocb)
1203                                         qparam.txop = 0;
1204                                 else if (use_11b)
1205                                         qparam.txop = 6016/32;
1206                                 else
1207                                         qparam.txop = 3008/32;
1208
1209                                 if (is_ocb)
1210                                         qparam.aifs = 3;
1211                                 else
1212                                         qparam.aifs = 2;
1213                                 break;
1214                         case IEEE80211_AC_VO:
1215                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1216                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1217                                 if (is_ocb)
1218                                         qparam.txop = 0;
1219                                 else if (use_11b)
1220                                         qparam.txop = 3264/32;
1221                                 else
1222                                         qparam.txop = 1504/32;
1223                                 qparam.aifs = 2;
1224                                 break;
1225                         }
1226                 }
1227
1228                 qparam.uapsd = false;
1229
1230                 sdata->tx_conf[ac] = qparam;
1231                 drv_conf_tx(local, sdata, ac, &qparam);
1232         }
1233
1234         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1235             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1236                 sdata->vif.bss_conf.qos = enable_qos;
1237                 if (bss_notify)
1238                         ieee80211_bss_info_change_notify(sdata,
1239                                                          BSS_CHANGED_QOS);
1240         }
1241 }
1242
1243 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1244                          u16 transaction, u16 auth_alg, u16 status,
1245                          const u8 *extra, size_t extra_len, const u8 *da,
1246                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1247                          u32 tx_flags)
1248 {
1249         struct ieee80211_local *local = sdata->local;
1250         struct sk_buff *skb;
1251         struct ieee80211_mgmt *mgmt;
1252         int err;
1253
1254         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1255         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1256                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1257         if (!skb)
1258                 return;
1259
1260         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1261
1262         mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1263         memset(mgmt, 0, 24 + 6);
1264         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1265                                           IEEE80211_STYPE_AUTH);
1266         memcpy(mgmt->da, da, ETH_ALEN);
1267         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1268         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1269         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1270         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1271         mgmt->u.auth.status_code = cpu_to_le16(status);
1272         if (extra)
1273                 memcpy(skb_put(skb, extra_len), extra, extra_len);
1274
1275         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1276                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1277                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1278                 WARN_ON(err);
1279         }
1280
1281         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1282                                         tx_flags;
1283         ieee80211_tx_skb(sdata, skb);
1284 }
1285
1286 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1287                                     const u8 *bssid, u16 stype, u16 reason,
1288                                     bool send_frame, u8 *frame_buf)
1289 {
1290         struct ieee80211_local *local = sdata->local;
1291         struct sk_buff *skb;
1292         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1293
1294         /* build frame */
1295         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1296         mgmt->duration = 0; /* initialize only */
1297         mgmt->seq_ctrl = 0; /* initialize only */
1298         memcpy(mgmt->da, bssid, ETH_ALEN);
1299         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1300         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1301         /* u.deauth.reason_code == u.disassoc.reason_code */
1302         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1303
1304         if (send_frame) {
1305                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1306                                     IEEE80211_DEAUTH_FRAME_LEN);
1307                 if (!skb)
1308                         return;
1309
1310                 skb_reserve(skb, local->hw.extra_tx_headroom);
1311
1312                 /* copy in frame */
1313                 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1314                        mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1315
1316                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1317                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1318                         IEEE80211_SKB_CB(skb)->flags |=
1319                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1320
1321                 ieee80211_tx_skb(sdata, skb);
1322         }
1323 }
1324
1325 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1326                                          u8 *buffer, size_t buffer_len,
1327                                          const u8 *ie, size_t ie_len,
1328                                          enum ieee80211_band band,
1329                                          u32 rate_mask,
1330                                          struct cfg80211_chan_def *chandef,
1331                                          size_t *offset)
1332 {
1333         struct ieee80211_supported_band *sband;
1334         u8 *pos = buffer, *end = buffer + buffer_len;
1335         size_t noffset;
1336         int supp_rates_len, i;
1337         u8 rates[32];
1338         int num_rates;
1339         int ext_rates_len;
1340         int shift;
1341         u32 rate_flags;
1342
1343         *offset = 0;
1344
1345         sband = local->hw.wiphy->bands[band];
1346         if (WARN_ON_ONCE(!sband))
1347                 return 0;
1348
1349         rate_flags = ieee80211_chandef_rate_flags(chandef);
1350         shift = ieee80211_chandef_get_shift(chandef);
1351
1352         num_rates = 0;
1353         for (i = 0; i < sband->n_bitrates; i++) {
1354                 if ((BIT(i) & rate_mask) == 0)
1355                         continue; /* skip rate */
1356                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1357                         continue;
1358
1359                 rates[num_rates++] =
1360                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1361                                           (1 << shift) * 5);
1362         }
1363
1364         supp_rates_len = min_t(int, num_rates, 8);
1365
1366         if (end - pos < 2 + supp_rates_len)
1367                 goto out_err;
1368         *pos++ = WLAN_EID_SUPP_RATES;
1369         *pos++ = supp_rates_len;
1370         memcpy(pos, rates, supp_rates_len);
1371         pos += supp_rates_len;
1372
1373         /* insert "request information" if in custom IEs */
1374         if (ie && ie_len) {
1375                 static const u8 before_extrates[] = {
1376                         WLAN_EID_SSID,
1377                         WLAN_EID_SUPP_RATES,
1378                         WLAN_EID_REQUEST,
1379                 };
1380                 noffset = ieee80211_ie_split(ie, ie_len,
1381                                              before_extrates,
1382                                              ARRAY_SIZE(before_extrates),
1383                                              *offset);
1384                 if (end - pos < noffset - *offset)
1385                         goto out_err;
1386                 memcpy(pos, ie + *offset, noffset - *offset);
1387                 pos += noffset - *offset;
1388                 *offset = noffset;
1389         }
1390
1391         ext_rates_len = num_rates - supp_rates_len;
1392         if (ext_rates_len > 0) {
1393                 if (end - pos < 2 + ext_rates_len)
1394                         goto out_err;
1395                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1396                 *pos++ = ext_rates_len;
1397                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1398                 pos += ext_rates_len;
1399         }
1400
1401         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1402                 if (end - pos < 3)
1403                         goto out_err;
1404                 *pos++ = WLAN_EID_DS_PARAMS;
1405                 *pos++ = 1;
1406                 *pos++ = ieee80211_frequency_to_channel(
1407                                 chandef->chan->center_freq);
1408         }
1409
1410         /* insert custom IEs that go before HT */
1411         if (ie && ie_len) {
1412                 static const u8 before_ht[] = {
1413                         WLAN_EID_SSID,
1414                         WLAN_EID_SUPP_RATES,
1415                         WLAN_EID_REQUEST,
1416                         WLAN_EID_EXT_SUPP_RATES,
1417                         WLAN_EID_DS_PARAMS,
1418                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1419                 };
1420                 noffset = ieee80211_ie_split(ie, ie_len,
1421                                              before_ht, ARRAY_SIZE(before_ht),
1422                                              *offset);
1423                 if (end - pos < noffset - *offset)
1424                         goto out_err;
1425                 memcpy(pos, ie + *offset, noffset - *offset);
1426                 pos += noffset - *offset;
1427                 *offset = noffset;
1428         }
1429
1430         if (sband->ht_cap.ht_supported) {
1431                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1432                         goto out_err;
1433                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1434                                                 sband->ht_cap.cap);
1435         }
1436
1437         /*
1438          * If adding more here, adjust code in main.c
1439          * that calculates local->scan_ies_len.
1440          */
1441
1442         /* insert custom IEs that go before VHT */
1443         if (ie && ie_len) {
1444                 static const u8 before_vht[] = {
1445                         WLAN_EID_SSID,
1446                         WLAN_EID_SUPP_RATES,
1447                         WLAN_EID_REQUEST,
1448                         WLAN_EID_EXT_SUPP_RATES,
1449                         WLAN_EID_DS_PARAMS,
1450                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1451                         WLAN_EID_HT_CAPABILITY,
1452                         WLAN_EID_BSS_COEX_2040,
1453                         WLAN_EID_EXT_CAPABILITY,
1454                         WLAN_EID_SSID_LIST,
1455                         WLAN_EID_CHANNEL_USAGE,
1456                         WLAN_EID_INTERWORKING,
1457                         /* mesh ID can't happen here */
1458                         /* 60 GHz can't happen here right now */
1459                 };
1460                 noffset = ieee80211_ie_split(ie, ie_len,
1461                                              before_vht, ARRAY_SIZE(before_vht),
1462                                              *offset);
1463                 if (end - pos < noffset - *offset)
1464                         goto out_err;
1465                 memcpy(pos, ie + *offset, noffset - *offset);
1466                 pos += noffset - *offset;
1467                 *offset = noffset;
1468         }
1469
1470         if (sband->vht_cap.vht_supported) {
1471                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1472                         goto out_err;
1473                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1474                                                  sband->vht_cap.cap);
1475         }
1476
1477         return pos - buffer;
1478  out_err:
1479         WARN_ONCE(1, "not enough space for preq IEs\n");
1480         return pos - buffer;
1481 }
1482
1483 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1484                              size_t buffer_len,
1485                              struct ieee80211_scan_ies *ie_desc,
1486                              const u8 *ie, size_t ie_len,
1487                              u8 bands_used, u32 *rate_masks,
1488                              struct cfg80211_chan_def *chandef)
1489 {
1490         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1491         int i;
1492
1493         memset(ie_desc, 0, sizeof(*ie_desc));
1494
1495         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1496                 if (bands_used & BIT(i)) {
1497                         pos += ieee80211_build_preq_ies_band(local,
1498                                                              buffer + pos,
1499                                                              buffer_len - pos,
1500                                                              ie, ie_len, i,
1501                                                              rate_masks[i],
1502                                                              chandef,
1503                                                              &custom_ie_offset);
1504                         ie_desc->ies[i] = buffer + old_pos;
1505                         ie_desc->len[i] = pos - old_pos;
1506                         old_pos = pos;
1507                 }
1508         }
1509
1510         /* add any remaining custom IEs */
1511         if (ie && ie_len) {
1512                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1513                               "not enough space for preq custom IEs\n"))
1514                         return pos;
1515                 memcpy(buffer + pos, ie + custom_ie_offset,
1516                        ie_len - custom_ie_offset);
1517                 ie_desc->common_ies = buffer + pos;
1518                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1519                 pos += ie_len - custom_ie_offset;
1520         }
1521
1522         return pos;
1523 };
1524
1525 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1526                                           const u8 *src, const u8 *dst,
1527                                           u32 ratemask,
1528                                           struct ieee80211_channel *chan,
1529                                           const u8 *ssid, size_t ssid_len,
1530                                           const u8 *ie, size_t ie_len,
1531                                           bool directed)
1532 {
1533         struct ieee80211_local *local = sdata->local;
1534         struct cfg80211_chan_def chandef;
1535         struct sk_buff *skb;
1536         struct ieee80211_mgmt *mgmt;
1537         int ies_len;
1538         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1539         struct ieee80211_scan_ies dummy_ie_desc;
1540
1541         /*
1542          * Do not send DS Channel parameter for directed probe requests
1543          * in order to maximize the chance that we get a response.  Some
1544          * badly-behaved APs don't respond when this parameter is included.
1545          */
1546         chandef.width = sdata->vif.bss_conf.chandef.width;
1547         if (directed)
1548                 chandef.chan = NULL;
1549         else
1550                 chandef.chan = chan;
1551
1552         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1553                                      100 + ie_len);
1554         if (!skb)
1555                 return NULL;
1556
1557         rate_masks[chan->band] = ratemask;
1558         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1559                                            skb_tailroom(skb), &dummy_ie_desc,
1560                                            ie, ie_len, BIT(chan->band),
1561                                            rate_masks, &chandef);
1562         skb_put(skb, ies_len);
1563
1564         if (dst) {
1565                 mgmt = (struct ieee80211_mgmt *) skb->data;
1566                 memcpy(mgmt->da, dst, ETH_ALEN);
1567                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1568         }
1569
1570         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1571
1572         return skb;
1573 }
1574
1575 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1576                               const u8 *src, const u8 *dst,
1577                               const u8 *ssid, size_t ssid_len,
1578                               const u8 *ie, size_t ie_len,
1579                               u32 ratemask, bool directed, u32 tx_flags,
1580                               struct ieee80211_channel *channel, bool scan)
1581 {
1582         struct sk_buff *skb;
1583
1584         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1585                                         ssid, ssid_len,
1586                                         ie, ie_len, directed);
1587         if (skb) {
1588                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1589                 if (scan)
1590                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1591                 else
1592                         ieee80211_tx_skb(sdata, skb);
1593         }
1594 }
1595
1596 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1597                             struct ieee802_11_elems *elems,
1598                             enum ieee80211_band band, u32 *basic_rates)
1599 {
1600         struct ieee80211_supported_band *sband;
1601         size_t num_rates;
1602         u32 supp_rates, rate_flags;
1603         int i, j, shift;
1604         sband = sdata->local->hw.wiphy->bands[band];
1605
1606         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1607         shift = ieee80211_vif_get_shift(&sdata->vif);
1608
1609         if (WARN_ON(!sband))
1610                 return 1;
1611
1612         num_rates = sband->n_bitrates;
1613         supp_rates = 0;
1614         for (i = 0; i < elems->supp_rates_len +
1615                      elems->ext_supp_rates_len; i++) {
1616                 u8 rate = 0;
1617                 int own_rate;
1618                 bool is_basic;
1619                 if (i < elems->supp_rates_len)
1620                         rate = elems->supp_rates[i];
1621                 else if (elems->ext_supp_rates)
1622                         rate = elems->ext_supp_rates
1623                                 [i - elems->supp_rates_len];
1624                 own_rate = 5 * (rate & 0x7f);
1625                 is_basic = !!(rate & 0x80);
1626
1627                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1628                         continue;
1629
1630                 for (j = 0; j < num_rates; j++) {
1631                         int brate;
1632                         if ((rate_flags & sband->bitrates[j].flags)
1633                             != rate_flags)
1634                                 continue;
1635
1636                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1637                                              1 << shift);
1638
1639                         if (brate == own_rate) {
1640                                 supp_rates |= BIT(j);
1641                                 if (basic_rates && is_basic)
1642                                         *basic_rates |= BIT(j);
1643                         }
1644                 }
1645         }
1646         return supp_rates;
1647 }
1648
1649 void ieee80211_stop_device(struct ieee80211_local *local)
1650 {
1651         ieee80211_led_radio(local, false);
1652         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1653
1654         cancel_work_sync(&local->reconfig_filter);
1655
1656         flush_workqueue(local->workqueue);
1657         drv_stop(local);
1658 }
1659
1660 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1661 {
1662         struct ieee80211_sub_if_data *sdata;
1663         struct ieee80211_chanctx *ctx;
1664
1665         /*
1666          * We get here if during resume the device can't be restarted properly.
1667          * We might also get here if this happens during HW reset, which is a
1668          * slightly different situation and we need to drop all connections in
1669          * the latter case.
1670          *
1671          * Ask cfg80211 to turn off all interfaces, this will result in more
1672          * warnings but at least we'll then get into a clean stopped state.
1673          */
1674
1675         local->resuming = false;
1676         local->suspended = false;
1677         local->started = false;
1678
1679         /* scheduled scan clearly can't be running any more, but tell
1680          * cfg80211 and clear local state
1681          */
1682         ieee80211_sched_scan_end(local);
1683
1684         list_for_each_entry(sdata, &local->interfaces, list)
1685                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1686
1687         /* Mark channel contexts as not being in the driver any more to avoid
1688          * removing them from the driver during the shutdown process...
1689          */
1690         mutex_lock(&local->chanctx_mtx);
1691         list_for_each_entry(ctx, &local->chanctx_list, list)
1692                 ctx->driver_present = false;
1693         mutex_unlock(&local->chanctx_mtx);
1694
1695         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1696 }
1697
1698 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1699                                      struct ieee80211_sub_if_data *sdata)
1700 {
1701         struct ieee80211_chanctx_conf *conf;
1702         struct ieee80211_chanctx *ctx;
1703
1704         if (!local->use_chanctx)
1705                 return;
1706
1707         mutex_lock(&local->chanctx_mtx);
1708         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1709                                          lockdep_is_held(&local->chanctx_mtx));
1710         if (conf) {
1711                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1712                 drv_assign_vif_chanctx(local, sdata, ctx);
1713         }
1714         mutex_unlock(&local->chanctx_mtx);
1715 }
1716
1717 int ieee80211_reconfig(struct ieee80211_local *local)
1718 {
1719         struct ieee80211_hw *hw = &local->hw;
1720         struct ieee80211_sub_if_data *sdata;
1721         struct ieee80211_chanctx *ctx;
1722         struct sta_info *sta;
1723         int res, i;
1724         bool reconfig_due_to_wowlan = false;
1725         struct ieee80211_sub_if_data *sched_scan_sdata;
1726         struct cfg80211_sched_scan_request *sched_scan_req;
1727         bool sched_scan_stopped = false;
1728
1729 #ifdef CONFIG_PM
1730         if (local->suspended)
1731                 local->resuming = true;
1732
1733         if (local->wowlan) {
1734                 res = drv_resume(local);
1735                 local->wowlan = false;
1736                 if (res < 0) {
1737                         local->resuming = false;
1738                         return res;
1739                 }
1740                 if (res == 0)
1741                         goto wake_up;
1742                 WARN_ON(res > 1);
1743                 /*
1744                  * res is 1, which means the driver requested
1745                  * to go through a regular reset on wakeup.
1746                  */
1747                 reconfig_due_to_wowlan = true;
1748         }
1749 #endif
1750         /* everything else happens only if HW was up & running */
1751         if (!local->open_count)
1752                 goto wake_up;
1753
1754         /*
1755          * Upon resume hardware can sometimes be goofy due to
1756          * various platform / driver / bus issues, so restarting
1757          * the device may at times not work immediately. Propagate
1758          * the error.
1759          */
1760         res = drv_start(local);
1761         if (res) {
1762                 if (local->suspended)
1763                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1764                 else
1765                         WARN(1, "Hardware became unavailable during restart.\n");
1766                 ieee80211_handle_reconfig_failure(local);
1767                 return res;
1768         }
1769
1770         /* setup fragmentation threshold */
1771         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1772
1773         /* setup RTS threshold */
1774         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1775
1776         /* reset coverage class */
1777         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1778
1779         ieee80211_led_radio(local, true);
1780         ieee80211_mod_tpt_led_trig(local,
1781                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1782
1783         /* add interfaces */
1784         sdata = rtnl_dereference(local->monitor_sdata);
1785         if (sdata) {
1786                 /* in HW restart it exists already */
1787                 WARN_ON(local->resuming);
1788                 res = drv_add_interface(local, sdata);
1789                 if (WARN_ON(res)) {
1790                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1791                         synchronize_net();
1792                         kfree(sdata);
1793                 }
1794         }
1795
1796         list_for_each_entry(sdata, &local->interfaces, list) {
1797                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1798                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1799                     ieee80211_sdata_running(sdata))
1800                         res = drv_add_interface(local, sdata);
1801         }
1802
1803         /* add channel contexts */
1804         if (local->use_chanctx) {
1805                 mutex_lock(&local->chanctx_mtx);
1806                 list_for_each_entry(ctx, &local->chanctx_list, list)
1807                         if (ctx->replace_state !=
1808                             IEEE80211_CHANCTX_REPLACES_OTHER)
1809                                 WARN_ON(drv_add_chanctx(local, ctx));
1810                 mutex_unlock(&local->chanctx_mtx);
1811
1812                 list_for_each_entry(sdata, &local->interfaces, list) {
1813                         if (!ieee80211_sdata_running(sdata))
1814                                 continue;
1815                         ieee80211_assign_chanctx(local, sdata);
1816                 }
1817
1818                 sdata = rtnl_dereference(local->monitor_sdata);
1819                 if (sdata && ieee80211_sdata_running(sdata))
1820                         ieee80211_assign_chanctx(local, sdata);
1821         }
1822
1823         /* add STAs back */
1824         mutex_lock(&local->sta_mtx);
1825         list_for_each_entry(sta, &local->sta_list, list) {
1826                 enum ieee80211_sta_state state;
1827
1828                 if (!sta->uploaded)
1829                         continue;
1830
1831                 /* AP-mode stations will be added later */
1832                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1833                         continue;
1834
1835                 for (state = IEEE80211_STA_NOTEXIST;
1836                      state < sta->sta_state; state++)
1837                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1838                                               state + 1));
1839         }
1840         mutex_unlock(&local->sta_mtx);
1841
1842         /* reconfigure tx conf */
1843         if (hw->queues >= IEEE80211_NUM_ACS) {
1844                 list_for_each_entry(sdata, &local->interfaces, list) {
1845                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1846                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1847                             !ieee80211_sdata_running(sdata))
1848                                 continue;
1849
1850                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1851                                 drv_conf_tx(local, sdata, i,
1852                                             &sdata->tx_conf[i]);
1853                 }
1854         }
1855
1856         /* reconfigure hardware */
1857         ieee80211_hw_config(local, ~0);
1858
1859         ieee80211_configure_filter(local);
1860
1861         /* Finally also reconfigure all the BSS information */
1862         list_for_each_entry(sdata, &local->interfaces, list) {
1863                 u32 changed;
1864
1865                 if (!ieee80211_sdata_running(sdata))
1866                         continue;
1867
1868                 /* common change flags for all interface types */
1869                 changed = BSS_CHANGED_ERP_CTS_PROT |
1870                           BSS_CHANGED_ERP_PREAMBLE |
1871                           BSS_CHANGED_ERP_SLOT |
1872                           BSS_CHANGED_HT |
1873                           BSS_CHANGED_BASIC_RATES |
1874                           BSS_CHANGED_BEACON_INT |
1875                           BSS_CHANGED_BSSID |
1876                           BSS_CHANGED_CQM |
1877                           BSS_CHANGED_QOS |
1878                           BSS_CHANGED_IDLE |
1879                           BSS_CHANGED_TXPOWER;
1880
1881                 switch (sdata->vif.type) {
1882                 case NL80211_IFTYPE_STATION:
1883                         changed |= BSS_CHANGED_ASSOC |
1884                                    BSS_CHANGED_ARP_FILTER |
1885                                    BSS_CHANGED_PS;
1886
1887                         /* Re-send beacon info report to the driver */
1888                         if (sdata->u.mgd.have_beacon)
1889                                 changed |= BSS_CHANGED_BEACON_INFO;
1890
1891                         sdata_lock(sdata);
1892                         ieee80211_bss_info_change_notify(sdata, changed);
1893                         sdata_unlock(sdata);
1894                         break;
1895                 case NL80211_IFTYPE_OCB:
1896                         changed |= BSS_CHANGED_OCB;
1897                         ieee80211_bss_info_change_notify(sdata, changed);
1898                         break;
1899                 case NL80211_IFTYPE_ADHOC:
1900                         changed |= BSS_CHANGED_IBSS;
1901                         /* fall through */
1902                 case NL80211_IFTYPE_AP:
1903                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1904
1905                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1906                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1907
1908                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1909                                         drv_start_ap(local, sdata);
1910                         }
1911
1912                         /* fall through */
1913                 case NL80211_IFTYPE_MESH_POINT:
1914                         if (sdata->vif.bss_conf.enable_beacon) {
1915                                 changed |= BSS_CHANGED_BEACON |
1916                                            BSS_CHANGED_BEACON_ENABLED;
1917                                 ieee80211_bss_info_change_notify(sdata, changed);
1918                         }
1919                         break;
1920                 case NL80211_IFTYPE_WDS:
1921                 case NL80211_IFTYPE_AP_VLAN:
1922                 case NL80211_IFTYPE_MONITOR:
1923                 case NL80211_IFTYPE_P2P_DEVICE:
1924                         /* nothing to do */
1925                         break;
1926                 case NL80211_IFTYPE_UNSPECIFIED:
1927                 case NUM_NL80211_IFTYPES:
1928                 case NL80211_IFTYPE_P2P_CLIENT:
1929                 case NL80211_IFTYPE_P2P_GO:
1930                         WARN_ON(1);
1931                         break;
1932                 }
1933         }
1934
1935         ieee80211_recalc_ps(local, -1);
1936
1937         /*
1938          * The sta might be in psm against the ap (e.g. because
1939          * this was the state before a hw restart), so we
1940          * explicitly send a null packet in order to make sure
1941          * it'll sync against the ap (and get out of psm).
1942          */
1943         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1944                 list_for_each_entry(sdata, &local->interfaces, list) {
1945                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1946                                 continue;
1947                         if (!sdata->u.mgd.associated)
1948                                 continue;
1949
1950                         ieee80211_send_nullfunc(local, sdata, 0);
1951                 }
1952         }
1953
1954         /* APs are now beaconing, add back stations */
1955         mutex_lock(&local->sta_mtx);
1956         list_for_each_entry(sta, &local->sta_list, list) {
1957                 enum ieee80211_sta_state state;
1958
1959                 if (!sta->uploaded)
1960                         continue;
1961
1962                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1963                         continue;
1964
1965                 for (state = IEEE80211_STA_NOTEXIST;
1966                      state < sta->sta_state; state++)
1967                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1968                                               state + 1));
1969         }
1970         mutex_unlock(&local->sta_mtx);
1971
1972         /* add back keys */
1973         list_for_each_entry(sdata, &local->interfaces, list)
1974                 if (ieee80211_sdata_running(sdata))
1975                         ieee80211_enable_keys(sdata);
1976
1977  wake_up:
1978         local->in_reconfig = false;
1979         barrier();
1980
1981         if (local->monitors == local->open_count && local->monitors > 0)
1982                 ieee80211_add_virtual_monitor(local);
1983
1984         /*
1985          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1986          * sessions can be established after a resume.
1987          *
1988          * Also tear down aggregation sessions since reconfiguring
1989          * them in a hardware restart scenario is not easily done
1990          * right now, and the hardware will have lost information
1991          * about the sessions, but we and the AP still think they
1992          * are active. This is really a workaround though.
1993          */
1994         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
1995                 mutex_lock(&local->sta_mtx);
1996
1997                 list_for_each_entry(sta, &local->sta_list, list) {
1998                         ieee80211_sta_tear_down_BA_sessions(
1999                                         sta, AGG_STOP_LOCAL_REQUEST);
2000                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2001                 }
2002
2003                 mutex_unlock(&local->sta_mtx);
2004         }
2005
2006         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2007                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2008                                         false);
2009
2010         /*
2011          * Reconfigure sched scan if it was interrupted by FW restart or
2012          * suspend.
2013          */
2014         mutex_lock(&local->mtx);
2015         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2016                                                 lockdep_is_held(&local->mtx));
2017         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2018                                                 lockdep_is_held(&local->mtx));
2019         if (sched_scan_sdata && sched_scan_req)
2020                 /*
2021                  * Sched scan stopped, but we don't want to report it. Instead,
2022                  * we're trying to reschedule.
2023                  */
2024                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2025                                                          sched_scan_req))
2026                         sched_scan_stopped = true;
2027         mutex_unlock(&local->mtx);
2028
2029         if (sched_scan_stopped)
2030                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2031
2032         /*
2033          * If this is for hw restart things are still running.
2034          * We may want to change that later, however.
2035          */
2036         if (!local->suspended || reconfig_due_to_wowlan)
2037                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2038
2039         if (!local->suspended)
2040                 return 0;
2041
2042 #ifdef CONFIG_PM
2043         /* first set suspended false, then resuming */
2044         local->suspended = false;
2045         mb();
2046         local->resuming = false;
2047
2048         if (!reconfig_due_to_wowlan)
2049                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2050
2051         list_for_each_entry(sdata, &local->interfaces, list) {
2052                 if (!ieee80211_sdata_running(sdata))
2053                         continue;
2054                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2055                         ieee80211_sta_restart(sdata);
2056         }
2057
2058         mod_timer(&local->sta_cleanup, jiffies + 1);
2059 #else
2060         WARN_ON(1);
2061 #endif
2062
2063         return 0;
2064 }
2065
2066 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2067 {
2068         struct ieee80211_sub_if_data *sdata;
2069         struct ieee80211_local *local;
2070         struct ieee80211_key *key;
2071
2072         if (WARN_ON(!vif))
2073                 return;
2074
2075         sdata = vif_to_sdata(vif);
2076         local = sdata->local;
2077
2078         if (WARN_ON(!local->resuming))
2079                 return;
2080
2081         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2082                 return;
2083
2084         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2085
2086         mutex_lock(&local->key_mtx);
2087         list_for_each_entry(key, &sdata->key_list, list)
2088                 key->flags |= KEY_FLAG_TAINTED;
2089         mutex_unlock(&local->key_mtx);
2090 }
2091 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2092
2093 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2094 {
2095         struct ieee80211_local *local = sdata->local;
2096         struct ieee80211_chanctx_conf *chanctx_conf;
2097         struct ieee80211_chanctx *chanctx;
2098
2099         mutex_lock(&local->chanctx_mtx);
2100
2101         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2102                                         lockdep_is_held(&local->chanctx_mtx));
2103
2104         if (WARN_ON_ONCE(!chanctx_conf))
2105                 goto unlock;
2106
2107         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2108         ieee80211_recalc_smps_chanctx(local, chanctx);
2109  unlock:
2110         mutex_unlock(&local->chanctx_mtx);
2111 }
2112
2113 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2114 {
2115         struct ieee80211_local *local = sdata->local;
2116         struct ieee80211_chanctx_conf *chanctx_conf;
2117         struct ieee80211_chanctx *chanctx;
2118
2119         mutex_lock(&local->chanctx_mtx);
2120
2121         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2122                                         lockdep_is_held(&local->chanctx_mtx));
2123
2124         if (WARN_ON_ONCE(!chanctx_conf))
2125                 goto unlock;
2126
2127         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2128         ieee80211_recalc_chanctx_min_def(local, chanctx);
2129  unlock:
2130         mutex_unlock(&local->chanctx_mtx);
2131 }
2132
2133 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2134 {
2135         int i;
2136
2137         for (i = 0; i < n_ids; i++)
2138                 if (ids[i] == id)
2139                         return true;
2140         return false;
2141 }
2142
2143 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2144                               const u8 *ids, int n_ids,
2145                               const u8 *after_ric, int n_after_ric,
2146                               size_t offset)
2147 {
2148         size_t pos = offset;
2149
2150         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2151                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2152                         pos += 2 + ies[pos + 1];
2153
2154                         while (pos < ielen &&
2155                                !ieee80211_id_in_list(after_ric, n_after_ric,
2156                                                      ies[pos]))
2157                                 pos += 2 + ies[pos + 1];
2158                 } else {
2159                         pos += 2 + ies[pos + 1];
2160                 }
2161         }
2162
2163         return pos;
2164 }
2165
2166 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2167                           const u8 *ids, int n_ids, size_t offset)
2168 {
2169         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2170 }
2171 EXPORT_SYMBOL(ieee80211_ie_split);
2172
2173 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2174 {
2175         size_t pos = offset;
2176
2177         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2178                 pos += 2 + ies[pos + 1];
2179
2180         return pos;
2181 }
2182
2183 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2184                                             int rssi_min_thold,
2185                                             int rssi_max_thold)
2186 {
2187         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2188
2189         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2190                 return;
2191
2192         /*
2193          * Scale up threshold values before storing it, as the RSSI averaging
2194          * algorithm uses a scaled up value as well. Change this scaling
2195          * factor if the RSSI averaging algorithm changes.
2196          */
2197         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2198         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2199 }
2200
2201 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2202                                     int rssi_min_thold,
2203                                     int rssi_max_thold)
2204 {
2205         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2206
2207         WARN_ON(rssi_min_thold == rssi_max_thold ||
2208                 rssi_min_thold > rssi_max_thold);
2209
2210         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2211                                        rssi_max_thold);
2212 }
2213 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2214
2215 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2216 {
2217         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2218
2219         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2220 }
2221 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2222
2223 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2224                               u16 cap)
2225 {
2226         __le16 tmp;
2227
2228         *pos++ = WLAN_EID_HT_CAPABILITY;
2229         *pos++ = sizeof(struct ieee80211_ht_cap);
2230         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2231
2232         /* capability flags */
2233         tmp = cpu_to_le16(cap);
2234         memcpy(pos, &tmp, sizeof(u16));
2235         pos += sizeof(u16);
2236
2237         /* AMPDU parameters */
2238         *pos++ = ht_cap->ampdu_factor |
2239                  (ht_cap->ampdu_density <<
2240                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2241
2242         /* MCS set */
2243         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2244         pos += sizeof(ht_cap->mcs);
2245
2246         /* extended capabilities */
2247         pos += sizeof(__le16);
2248
2249         /* BF capabilities */
2250         pos += sizeof(__le32);
2251
2252         /* antenna selection */
2253         pos += sizeof(u8);
2254
2255         return pos;
2256 }
2257
2258 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2259                                u32 cap)
2260 {
2261         __le32 tmp;
2262
2263         *pos++ = WLAN_EID_VHT_CAPABILITY;
2264         *pos++ = sizeof(struct ieee80211_vht_cap);
2265         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2266
2267         /* capability flags */
2268         tmp = cpu_to_le32(cap);
2269         memcpy(pos, &tmp, sizeof(u32));
2270         pos += sizeof(u32);
2271
2272         /* VHT MCS set */
2273         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2274         pos += sizeof(vht_cap->vht_mcs);
2275
2276         return pos;
2277 }
2278
2279 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2280                                const struct cfg80211_chan_def *chandef,
2281                                u16 prot_mode)
2282 {
2283         struct ieee80211_ht_operation *ht_oper;
2284         /* Build HT Information */
2285         *pos++ = WLAN_EID_HT_OPERATION;
2286         *pos++ = sizeof(struct ieee80211_ht_operation);
2287         ht_oper = (struct ieee80211_ht_operation *)pos;
2288         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2289                                         chandef->chan->center_freq);
2290         switch (chandef->width) {
2291         case NL80211_CHAN_WIDTH_160:
2292         case NL80211_CHAN_WIDTH_80P80:
2293         case NL80211_CHAN_WIDTH_80:
2294         case NL80211_CHAN_WIDTH_40:
2295                 if (chandef->center_freq1 > chandef->chan->center_freq)
2296                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2297                 else
2298                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2299                 break;
2300         default:
2301                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2302                 break;
2303         }
2304         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2305             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2306             chandef->width != NL80211_CHAN_WIDTH_20)
2307                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2308
2309         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2310         ht_oper->stbc_param = 0x0000;
2311
2312         /* It seems that Basic MCS set and Supported MCS set
2313            are identical for the first 10 bytes */
2314         memset(&ht_oper->basic_set, 0, 16);
2315         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2316
2317         return pos + sizeof(struct ieee80211_ht_operation);
2318 }
2319
2320 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2321                                   const struct ieee80211_ht_operation *ht_oper,
2322                                   struct cfg80211_chan_def *chandef)
2323 {
2324         enum nl80211_channel_type channel_type;
2325
2326         if (!ht_oper) {
2327                 cfg80211_chandef_create(chandef, control_chan,
2328                                         NL80211_CHAN_NO_HT);
2329                 return;
2330         }
2331
2332         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2333         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2334                 channel_type = NL80211_CHAN_HT20;
2335                 break;
2336         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2337                 channel_type = NL80211_CHAN_HT40PLUS;
2338                 break;
2339         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2340                 channel_type = NL80211_CHAN_HT40MINUS;
2341                 break;
2342         default:
2343                 channel_type = NL80211_CHAN_NO_HT;
2344         }
2345
2346         cfg80211_chandef_create(chandef, control_chan, channel_type);
2347 }
2348
2349 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2350                              const struct ieee80211_supported_band *sband,
2351                              const u8 *srates, int srates_len, u32 *rates)
2352 {
2353         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2354         int shift = ieee80211_chandef_get_shift(chandef);
2355         struct ieee80211_rate *br;
2356         int brate, rate, i, j, count = 0;
2357
2358         *rates = 0;
2359
2360         for (i = 0; i < srates_len; i++) {
2361                 rate = srates[i] & 0x7f;
2362
2363                 for (j = 0; j < sband->n_bitrates; j++) {
2364                         br = &sband->bitrates[j];
2365                         if ((rate_flags & br->flags) != rate_flags)
2366                                 continue;
2367
2368                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2369                         if (brate == rate) {
2370                                 *rates |= BIT(j);
2371                                 count++;
2372                                 break;
2373                         }
2374                 }
2375         }
2376         return count;
2377 }
2378
2379 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2380                             struct sk_buff *skb, bool need_basic,
2381                             enum ieee80211_band band)
2382 {
2383         struct ieee80211_local *local = sdata->local;
2384         struct ieee80211_supported_band *sband;
2385         int rate, shift;
2386         u8 i, rates, *pos;
2387         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2388         u32 rate_flags;
2389
2390         shift = ieee80211_vif_get_shift(&sdata->vif);
2391         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2392         sband = local->hw.wiphy->bands[band];
2393         rates = 0;
2394         for (i = 0; i < sband->n_bitrates; i++) {
2395                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2396                         continue;
2397                 rates++;
2398         }
2399         if (rates > 8)
2400                 rates = 8;
2401
2402         if (skb_tailroom(skb) < rates + 2)
2403                 return -ENOMEM;
2404
2405         pos = skb_put(skb, rates + 2);
2406         *pos++ = WLAN_EID_SUPP_RATES;
2407         *pos++ = rates;
2408         for (i = 0; i < rates; i++) {
2409                 u8 basic = 0;
2410                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2411                         continue;
2412
2413                 if (need_basic && basic_rates & BIT(i))
2414                         basic = 0x80;
2415                 rate = sband->bitrates[i].bitrate;
2416                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2417                                     5 * (1 << shift));
2418                 *pos++ = basic | (u8) rate;
2419         }
2420
2421         return 0;
2422 }
2423
2424 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2425                                 struct sk_buff *skb, bool need_basic,
2426                                 enum ieee80211_band band)
2427 {
2428         struct ieee80211_local *local = sdata->local;
2429         struct ieee80211_supported_band *sband;
2430         int rate, shift;
2431         u8 i, exrates, *pos;
2432         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2433         u32 rate_flags;
2434
2435         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2436         shift = ieee80211_vif_get_shift(&sdata->vif);
2437
2438         sband = local->hw.wiphy->bands[band];
2439         exrates = 0;
2440         for (i = 0; i < sband->n_bitrates; i++) {
2441                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2442                         continue;
2443                 exrates++;
2444         }
2445
2446         if (exrates > 8)
2447                 exrates -= 8;
2448         else
2449                 exrates = 0;
2450
2451         if (skb_tailroom(skb) < exrates + 2)
2452                 return -ENOMEM;
2453
2454         if (exrates) {
2455                 pos = skb_put(skb, exrates + 2);
2456                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2457                 *pos++ = exrates;
2458                 for (i = 8; i < sband->n_bitrates; i++) {
2459                         u8 basic = 0;
2460                         if ((rate_flags & sband->bitrates[i].flags)
2461                             != rate_flags)
2462                                 continue;
2463                         if (need_basic && basic_rates & BIT(i))
2464                                 basic = 0x80;
2465                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2466                                             5 * (1 << shift));
2467                         *pos++ = basic | (u8) rate;
2468                 }
2469         }
2470         return 0;
2471 }
2472
2473 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2474 {
2475         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2476         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2477
2478         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2479                 /* non-managed type inferfaces */
2480                 return 0;
2481         }
2482         return ifmgd->ave_beacon_signal / 16;
2483 }
2484 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2485
2486 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2487 {
2488         if (!mcs)
2489                 return 1;
2490
2491         /* TODO: consider rx_highest */
2492
2493         if (mcs->rx_mask[3])
2494                 return 4;
2495         if (mcs->rx_mask[2])
2496                 return 3;
2497         if (mcs->rx_mask[1])
2498                 return 2;
2499         return 1;
2500 }
2501
2502 /**
2503  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2504  * @local: mac80211 hw info struct
2505  * @status: RX status
2506  * @mpdu_len: total MPDU length (including FCS)
2507  * @mpdu_offset: offset into MPDU to calculate timestamp at
2508  *
2509  * This function calculates the RX timestamp at the given MPDU offset, taking
2510  * into account what the RX timestamp was. An offset of 0 will just normalize
2511  * the timestamp to TSF at beginning of MPDU reception.
2512  */
2513 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2514                                      struct ieee80211_rx_status *status,
2515                                      unsigned int mpdu_len,
2516                                      unsigned int mpdu_offset)
2517 {
2518         u64 ts = status->mactime;
2519         struct rate_info ri;
2520         u16 rate;
2521
2522         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2523                 return 0;
2524
2525         memset(&ri, 0, sizeof(ri));
2526
2527         /* Fill cfg80211 rate info */
2528         if (status->flag & RX_FLAG_HT) {
2529                 ri.mcs = status->rate_idx;
2530                 ri.flags |= RATE_INFO_FLAGS_MCS;
2531                 if (status->flag & RX_FLAG_40MHZ)
2532                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2533                 if (status->flag & RX_FLAG_SHORT_GI)
2534                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2535         } else if (status->flag & RX_FLAG_VHT) {
2536                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2537                 ri.mcs = status->rate_idx;
2538                 ri.nss = status->vht_nss;
2539                 if (status->flag & RX_FLAG_40MHZ)
2540                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2541                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2542                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2543                 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2544                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2545                 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2546                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2547                 if (status->flag & RX_FLAG_SHORT_GI)
2548                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2549         } else {
2550                 struct ieee80211_supported_band *sband;
2551                 int shift = 0;
2552                 int bitrate;
2553
2554                 if (status->flag & RX_FLAG_10MHZ)
2555                         shift = 1;
2556                 if (status->flag & RX_FLAG_5MHZ)
2557                         shift = 2;
2558
2559                 sband = local->hw.wiphy->bands[status->band];
2560                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2561                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2562         }
2563
2564         rate = cfg80211_calculate_bitrate(&ri);
2565         if (WARN_ONCE(!rate,
2566                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2567                       status->flag, status->rate_idx, status->vht_nss))
2568                 return 0;
2569
2570         /* rewind from end of MPDU */
2571         if (status->flag & RX_FLAG_MACTIME_END)
2572                 ts -= mpdu_len * 8 * 10 / rate;
2573
2574         ts += mpdu_offset * 8 * 10 / rate;
2575
2576         return ts;
2577 }
2578
2579 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2580 {
2581         struct ieee80211_sub_if_data *sdata;
2582         struct cfg80211_chan_def chandef;
2583
2584         mutex_lock(&local->mtx);
2585         mutex_lock(&local->iflist_mtx);
2586         list_for_each_entry(sdata, &local->interfaces, list) {
2587                 /* it might be waiting for the local->mtx, but then
2588                  * by the time it gets it, sdata->wdev.cac_started
2589                  * will no longer be true
2590                  */
2591                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2592
2593                 if (sdata->wdev.cac_started) {
2594                         chandef = sdata->vif.bss_conf.chandef;
2595                         ieee80211_vif_release_channel(sdata);
2596                         cfg80211_cac_event(sdata->dev,
2597                                            &chandef,
2598                                            NL80211_RADAR_CAC_ABORTED,
2599                                            GFP_KERNEL);
2600                 }
2601         }
2602         mutex_unlock(&local->iflist_mtx);
2603         mutex_unlock(&local->mtx);
2604 }
2605
2606 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2607 {
2608         struct ieee80211_local *local =
2609                 container_of(work, struct ieee80211_local, radar_detected_work);
2610         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2611         struct ieee80211_chanctx *ctx;
2612         int num_chanctx = 0;
2613
2614         mutex_lock(&local->chanctx_mtx);
2615         list_for_each_entry(ctx, &local->chanctx_list, list) {
2616                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2617                         continue;
2618
2619                 num_chanctx++;
2620                 chandef = ctx->conf.def;
2621         }
2622         mutex_unlock(&local->chanctx_mtx);
2623
2624         ieee80211_dfs_cac_cancel(local);
2625
2626         if (num_chanctx > 1)
2627                 /* XXX: multi-channel is not supported yet */
2628                 WARN_ON(1);
2629         else
2630                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2631 }
2632
2633 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2634 {
2635         struct ieee80211_local *local = hw_to_local(hw);
2636
2637         trace_api_radar_detected(local);
2638
2639         ieee80211_queue_work(hw, &local->radar_detected_work);
2640 }
2641 EXPORT_SYMBOL(ieee80211_radar_detected);
2642
2643 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2644 {
2645         u32 ret;
2646         int tmp;
2647
2648         switch (c->width) {
2649         case NL80211_CHAN_WIDTH_20:
2650                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2651                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2652                 break;
2653         case NL80211_CHAN_WIDTH_40:
2654                 c->width = NL80211_CHAN_WIDTH_20;
2655                 c->center_freq1 = c->chan->center_freq;
2656                 ret = IEEE80211_STA_DISABLE_40MHZ |
2657                       IEEE80211_STA_DISABLE_VHT;
2658                 break;
2659         case NL80211_CHAN_WIDTH_80:
2660                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2661                 /* n_P40 */
2662                 tmp /= 2;
2663                 /* freq_P40 */
2664                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2665                 c->width = NL80211_CHAN_WIDTH_40;
2666                 ret = IEEE80211_STA_DISABLE_VHT;
2667                 break;
2668         case NL80211_CHAN_WIDTH_80P80:
2669                 c->center_freq2 = 0;
2670                 c->width = NL80211_CHAN_WIDTH_80;
2671                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2672                       IEEE80211_STA_DISABLE_160MHZ;
2673                 break;
2674         case NL80211_CHAN_WIDTH_160:
2675                 /* n_P20 */
2676                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2677                 /* n_P80 */
2678                 tmp /= 4;
2679                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2680                 c->width = NL80211_CHAN_WIDTH_80;
2681                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2682                       IEEE80211_STA_DISABLE_160MHZ;
2683                 break;
2684         default:
2685         case NL80211_CHAN_WIDTH_20_NOHT:
2686                 WARN_ON_ONCE(1);
2687                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2688                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2689                 break;
2690         case NL80211_CHAN_WIDTH_5:
2691         case NL80211_CHAN_WIDTH_10:
2692                 WARN_ON_ONCE(1);
2693                 /* keep c->width */
2694                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2695                 break;
2696         }
2697
2698         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2699
2700         return ret;
2701 }
2702
2703 /*
2704  * Returns true if smps_mode_new is strictly more restrictive than
2705  * smps_mode_old.
2706  */
2707 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2708                                    enum ieee80211_smps_mode smps_mode_new)
2709 {
2710         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2711                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2712                 return false;
2713
2714         switch (smps_mode_old) {
2715         case IEEE80211_SMPS_STATIC:
2716                 return false;
2717         case IEEE80211_SMPS_DYNAMIC:
2718                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2719         case IEEE80211_SMPS_OFF:
2720                 return smps_mode_new != IEEE80211_SMPS_OFF;
2721         default:
2722                 WARN_ON(1);
2723         }
2724
2725         return false;
2726 }
2727
2728 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2729                               struct cfg80211_csa_settings *csa_settings)
2730 {
2731         struct sk_buff *skb;
2732         struct ieee80211_mgmt *mgmt;
2733         struct ieee80211_local *local = sdata->local;
2734         int freq;
2735         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2736                                sizeof(mgmt->u.action.u.chan_switch);
2737         u8 *pos;
2738
2739         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2740             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2741                 return -EOPNOTSUPP;
2742
2743         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2744                             5 + /* channel switch announcement element */
2745                             3 + /* secondary channel offset element */
2746                             8); /* mesh channel switch parameters element */
2747         if (!skb)
2748                 return -ENOMEM;
2749
2750         skb_reserve(skb, local->tx_headroom);
2751         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2752         memset(mgmt, 0, hdr_len);
2753         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2754                                           IEEE80211_STYPE_ACTION);
2755
2756         eth_broadcast_addr(mgmt->da);
2757         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2758         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2759                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2760         } else {
2761                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2762                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2763         }
2764         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2765         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2766         pos = skb_put(skb, 5);
2767         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2768         *pos++ = 3;                                             /* IE length */
2769         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2770         freq = csa_settings->chandef.chan->center_freq;
2771         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2772         *pos++ = csa_settings->count;                           /* count */
2773
2774         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2775                 enum nl80211_channel_type ch_type;
2776
2777                 skb_put(skb, 3);
2778                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2779                 *pos++ = 1;                                     /* IE length */
2780                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2781                 if (ch_type == NL80211_CHAN_HT40PLUS)
2782                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2783                 else
2784                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2785         }
2786
2787         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2788                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2789
2790                 skb_put(skb, 8);
2791                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2792                 *pos++ = 6;                                     /* IE length */
2793                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2794                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2795                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2796                 *pos++ |= csa_settings->block_tx ?
2797                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2798                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2799                 pos += 2;
2800                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2801                 pos += 2;
2802         }
2803
2804         ieee80211_tx_skb(sdata, skb);
2805         return 0;
2806 }
2807
2808 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2809 {
2810         return !(cs == NULL || cs->cipher == 0 ||
2811                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2812                  cs->hdr_len <= cs->key_idx_off ||
2813                  cs->key_idx_shift > 7 ||
2814                  cs->key_idx_mask == 0);
2815 }
2816
2817 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2818 {
2819         int i;
2820
2821         /* Ensure we have enough iftype bitmap space for all iftype values */
2822         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2823
2824         for (i = 0; i < n; i++)
2825                 if (!ieee80211_cs_valid(&cs[i]))
2826                         return false;
2827
2828         return true;
2829 }
2830
2831 const struct ieee80211_cipher_scheme *
2832 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2833                  enum nl80211_iftype iftype)
2834 {
2835         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2836         int n = local->hw.n_cipher_schemes;
2837         int i;
2838         const struct ieee80211_cipher_scheme *cs = NULL;
2839
2840         for (i = 0; i < n; i++) {
2841                 if (l[i].cipher == cipher) {
2842                         cs = &l[i];
2843                         break;
2844                 }
2845         }
2846
2847         if (!cs || !(cs->iftype & BIT(iftype)))
2848                 return NULL;
2849
2850         return cs;
2851 }
2852
2853 int ieee80211_cs_headroom(struct ieee80211_local *local,
2854                           struct cfg80211_crypto_settings *crypto,
2855                           enum nl80211_iftype iftype)
2856 {
2857         const struct ieee80211_cipher_scheme *cs;
2858         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2859         int i;
2860
2861         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2862                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2863                                       iftype);
2864
2865                 if (cs && headroom < cs->hdr_len)
2866                         headroom = cs->hdr_len;
2867         }
2868
2869         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2870         if (cs && headroom < cs->hdr_len)
2871                 headroom = cs->hdr_len;
2872
2873         return headroom;
2874 }
2875
2876 static bool
2877 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2878 {
2879         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2880         int skip;
2881
2882         if (end > 0)
2883                 return false;
2884
2885         /* End time is in the past, check for repetitions */
2886         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2887         if (data->count[i] < 255) {
2888                 if (data->count[i] <= skip) {
2889                         data->count[i] = 0;
2890                         return false;
2891                 }
2892
2893                 data->count[i] -= skip;
2894         }
2895
2896         data->desc[i].start += skip * data->desc[i].interval;
2897
2898         return true;
2899 }
2900
2901 static bool
2902 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2903                              s32 *offset)
2904 {
2905         bool ret = false;
2906         int i;
2907
2908         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2909                 s32 cur;
2910
2911                 if (!data->count[i])
2912                         continue;
2913
2914                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2915                         ret = true;
2916
2917                 cur = data->desc[i].start - tsf;
2918                 if (cur > *offset)
2919                         continue;
2920
2921                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2922                 if (cur > *offset)
2923                         *offset = cur;
2924         }
2925
2926         return ret;
2927 }
2928
2929 static u32
2930 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2931 {
2932         s32 offset = 0;
2933         int tries = 0;
2934         /*
2935          * arbitrary limit, used to avoid infinite loops when combined NoA
2936          * descriptors cover the full time period.
2937          */
2938         int max_tries = 5;
2939
2940         ieee80211_extend_absent_time(data, tsf, &offset);
2941         do {
2942                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2943                         break;
2944
2945                 tries++;
2946         } while (tries < max_tries);
2947
2948         return offset;
2949 }
2950
2951 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2952 {
2953         u32 next_offset = BIT(31) - 1;
2954         int i;
2955
2956         data->absent = 0;
2957         data->has_next_tsf = false;
2958         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2959                 s32 start;
2960
2961                 if (!data->count[i])
2962                         continue;
2963
2964                 ieee80211_extend_noa_desc(data, tsf, i);
2965                 start = data->desc[i].start - tsf;
2966                 if (start <= 0)
2967                         data->absent |= BIT(i);
2968
2969                 if (next_offset > start)
2970                         next_offset = start;
2971
2972                 data->has_next_tsf = true;
2973         }
2974
2975         if (data->absent)
2976                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2977
2978         data->next_tsf = tsf + next_offset;
2979 }
2980 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2981
2982 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2983                             struct ieee80211_noa_data *data, u32 tsf)
2984 {
2985         int ret = 0;
2986         int i;
2987
2988         memset(data, 0, sizeof(*data));
2989
2990         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2991                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
2992
2993                 if (!desc->count || !desc->duration)
2994                         continue;
2995
2996                 data->count[i] = desc->count;
2997                 data->desc[i].start = le32_to_cpu(desc->start_time);
2998                 data->desc[i].duration = le32_to_cpu(desc->duration);
2999                 data->desc[i].interval = le32_to_cpu(desc->interval);
3000
3001                 if (data->count[i] > 1 &&
3002                     data->desc[i].interval < data->desc[i].duration)
3003                         continue;
3004
3005                 ieee80211_extend_noa_desc(data, tsf, i);
3006                 ret++;
3007         }
3008
3009         if (ret)
3010                 ieee80211_update_p2p_noa(data, tsf);
3011
3012         return ret;
3013 }
3014 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3015
3016 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3017                            struct ieee80211_sub_if_data *sdata)
3018 {
3019         u64 tsf = drv_get_tsf(local, sdata);
3020         u64 dtim_count = 0;
3021         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3022         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3023         struct ps_data *ps;
3024         u8 bcns_from_dtim;
3025
3026         if (tsf == -1ULL || !beacon_int || !dtim_period)
3027                 return;
3028
3029         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3030             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3031                 if (!sdata->bss)
3032                         return;
3033
3034                 ps = &sdata->bss->ps;
3035         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3036                 ps = &sdata->u.mesh.ps;
3037         } else {
3038                 return;
3039         }
3040
3041         /*
3042          * actually finds last dtim_count, mac80211 will update in
3043          * __beacon_add_tim().
3044          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3045          */
3046         do_div(tsf, beacon_int);
3047         bcns_from_dtim = do_div(tsf, dtim_period);
3048         /* just had a DTIM */
3049         if (!bcns_from_dtim)
3050                 dtim_count = 0;
3051         else
3052                 dtim_count = dtim_period - bcns_from_dtim;
3053
3054         ps->dtim_count = dtim_count;
3055 }
3056
3057 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3058                                          struct ieee80211_chanctx *ctx)
3059 {
3060         struct ieee80211_sub_if_data *sdata;
3061         u8 radar_detect = 0;
3062
3063         lockdep_assert_held(&local->chanctx_mtx);
3064
3065         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3066                 return 0;
3067
3068         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3069                 if (sdata->reserved_radar_required)
3070                         radar_detect |= BIT(sdata->reserved_chandef.width);
3071
3072         /*
3073          * An in-place reservation context should not have any assigned vifs
3074          * until it replaces the other context.
3075          */
3076         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3077                 !list_empty(&ctx->assigned_vifs));
3078
3079         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3080                 if (sdata->radar_required)
3081                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3082
3083         return radar_detect;
3084 }
3085
3086 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3087                                  const struct cfg80211_chan_def *chandef,
3088                                  enum ieee80211_chanctx_mode chanmode,
3089                                  u8 radar_detect)
3090 {
3091         struct ieee80211_local *local = sdata->local;
3092         struct ieee80211_sub_if_data *sdata_iter;
3093         enum nl80211_iftype iftype = sdata->wdev.iftype;
3094         int num[NUM_NL80211_IFTYPES];
3095         struct ieee80211_chanctx *ctx;
3096         int num_different_channels = 0;
3097         int total = 1;
3098
3099         lockdep_assert_held(&local->chanctx_mtx);
3100
3101         if (WARN_ON(hweight32(radar_detect) > 1))
3102                 return -EINVAL;
3103
3104         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3105                     !chandef->chan))
3106                 return -EINVAL;
3107
3108         if (chandef)
3109                 num_different_channels = 1;
3110
3111         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3112                 return -EINVAL;
3113
3114         /* Always allow software iftypes */
3115         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3116                 if (radar_detect)
3117                         return -EINVAL;
3118                 return 0;
3119         }
3120
3121         memset(num, 0, sizeof(num));
3122
3123         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3124                 num[iftype] = 1;
3125
3126         list_for_each_entry(ctx, &local->chanctx_list, list) {
3127                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3128                         continue;
3129                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3130                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3131                         num_different_channels++;
3132                         continue;
3133                 }
3134                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3135                     cfg80211_chandef_compatible(chandef,
3136                                                 &ctx->conf.def))
3137                         continue;
3138                 num_different_channels++;
3139         }
3140
3141         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3142                 struct wireless_dev *wdev_iter;
3143
3144                 wdev_iter = &sdata_iter->wdev;
3145
3146                 if (sdata_iter == sdata ||
3147                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3148                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3149                         continue;
3150
3151                 num[wdev_iter->iftype]++;
3152                 total++;
3153         }
3154
3155         if (total == 1 && !radar_detect)
3156                 return 0;
3157
3158         return cfg80211_check_combinations(local->hw.wiphy,
3159                                            num_different_channels,
3160                                            radar_detect, num);
3161 }
3162
3163 static void
3164 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3165                          void *data)
3166 {
3167         u32 *max_num_different_channels = data;
3168
3169         *max_num_different_channels = max(*max_num_different_channels,
3170                                           c->num_different_channels);
3171 }
3172
3173 int ieee80211_max_num_channels(struct ieee80211_local *local)
3174 {
3175         struct ieee80211_sub_if_data *sdata;
3176         int num[NUM_NL80211_IFTYPES] = {};
3177         struct ieee80211_chanctx *ctx;
3178         int num_different_channels = 0;
3179         u8 radar_detect = 0;
3180         u32 max_num_different_channels = 1;
3181         int err;
3182
3183         lockdep_assert_held(&local->chanctx_mtx);
3184
3185         list_for_each_entry(ctx, &local->chanctx_list, list) {
3186                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3187                         continue;
3188
3189                 num_different_channels++;
3190
3191                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3192         }
3193
3194         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3195                 num[sdata->wdev.iftype]++;
3196
3197         err = cfg80211_iter_combinations(local->hw.wiphy,
3198                                          num_different_channels, radar_detect,
3199                                          num, ieee80211_iter_max_chans,
3200                                          &max_num_different_channels);
3201         if (err < 0)
3202                 return err;
3203
3204         return max_num_different_channels;
3205 }
3206
3207 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3208 {
3209         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3210         *buf++ = 7; /* len */
3211         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3212         *buf++ = 0x50;
3213         *buf++ = 0xf2;
3214         *buf++ = 2; /* WME */
3215         *buf++ = 0; /* WME info */
3216         *buf++ = 1; /* WME ver */
3217         *buf++ = qosinfo; /* U-APSD no in use */
3218
3219         return buf;
3220 }