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         bool have_80mhz = false;
1343
1344         *offset = 0;
1345
1346         sband = local->hw.wiphy->bands[band];
1347         if (WARN_ON_ONCE(!sband))
1348                 return 0;
1349
1350         rate_flags = ieee80211_chandef_rate_flags(chandef);
1351         shift = ieee80211_chandef_get_shift(chandef);
1352
1353         num_rates = 0;
1354         for (i = 0; i < sband->n_bitrates; i++) {
1355                 if ((BIT(i) & rate_mask) == 0)
1356                         continue; /* skip rate */
1357                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1358                         continue;
1359
1360                 rates[num_rates++] =
1361                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1362                                           (1 << shift) * 5);
1363         }
1364
1365         supp_rates_len = min_t(int, num_rates, 8);
1366
1367         if (end - pos < 2 + supp_rates_len)
1368                 goto out_err;
1369         *pos++ = WLAN_EID_SUPP_RATES;
1370         *pos++ = supp_rates_len;
1371         memcpy(pos, rates, supp_rates_len);
1372         pos += supp_rates_len;
1373
1374         /* insert "request information" if in custom IEs */
1375         if (ie && ie_len) {
1376                 static const u8 before_extrates[] = {
1377                         WLAN_EID_SSID,
1378                         WLAN_EID_SUPP_RATES,
1379                         WLAN_EID_REQUEST,
1380                 };
1381                 noffset = ieee80211_ie_split(ie, ie_len,
1382                                              before_extrates,
1383                                              ARRAY_SIZE(before_extrates),
1384                                              *offset);
1385                 if (end - pos < noffset - *offset)
1386                         goto out_err;
1387                 memcpy(pos, ie + *offset, noffset - *offset);
1388                 pos += noffset - *offset;
1389                 *offset = noffset;
1390         }
1391
1392         ext_rates_len = num_rates - supp_rates_len;
1393         if (ext_rates_len > 0) {
1394                 if (end - pos < 2 + ext_rates_len)
1395                         goto out_err;
1396                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1397                 *pos++ = ext_rates_len;
1398                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1399                 pos += ext_rates_len;
1400         }
1401
1402         if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1403                 if (end - pos < 3)
1404                         goto out_err;
1405                 *pos++ = WLAN_EID_DS_PARAMS;
1406                 *pos++ = 1;
1407                 *pos++ = ieee80211_frequency_to_channel(
1408                                 chandef->chan->center_freq);
1409         }
1410
1411         /* insert custom IEs that go before HT */
1412         if (ie && ie_len) {
1413                 static const u8 before_ht[] = {
1414                         WLAN_EID_SSID,
1415                         WLAN_EID_SUPP_RATES,
1416                         WLAN_EID_REQUEST,
1417                         WLAN_EID_EXT_SUPP_RATES,
1418                         WLAN_EID_DS_PARAMS,
1419                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1420                 };
1421                 noffset = ieee80211_ie_split(ie, ie_len,
1422                                              before_ht, ARRAY_SIZE(before_ht),
1423                                              *offset);
1424                 if (end - pos < noffset - *offset)
1425                         goto out_err;
1426                 memcpy(pos, ie + *offset, noffset - *offset);
1427                 pos += noffset - *offset;
1428                 *offset = noffset;
1429         }
1430
1431         if (sband->ht_cap.ht_supported) {
1432                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1433                         goto out_err;
1434                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1435                                                 sband->ht_cap.cap);
1436         }
1437
1438         /*
1439          * If adding more here, adjust code in main.c
1440          * that calculates local->scan_ies_len.
1441          */
1442
1443         /* insert custom IEs that go before VHT */
1444         if (ie && ie_len) {
1445                 static const u8 before_vht[] = {
1446                         WLAN_EID_SSID,
1447                         WLAN_EID_SUPP_RATES,
1448                         WLAN_EID_REQUEST,
1449                         WLAN_EID_EXT_SUPP_RATES,
1450                         WLAN_EID_DS_PARAMS,
1451                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1452                         WLAN_EID_HT_CAPABILITY,
1453                         WLAN_EID_BSS_COEX_2040,
1454                         WLAN_EID_EXT_CAPABILITY,
1455                         WLAN_EID_SSID_LIST,
1456                         WLAN_EID_CHANNEL_USAGE,
1457                         WLAN_EID_INTERWORKING,
1458                         /* mesh ID can't happen here */
1459                         /* 60 GHz can't happen here right now */
1460                 };
1461                 noffset = ieee80211_ie_split(ie, ie_len,
1462                                              before_vht, ARRAY_SIZE(before_vht),
1463                                              *offset);
1464                 if (end - pos < noffset - *offset)
1465                         goto out_err;
1466                 memcpy(pos, ie + *offset, noffset - *offset);
1467                 pos += noffset - *offset;
1468                 *offset = noffset;
1469         }
1470
1471         /* Check if any channel in this sband supports at least 80 MHz */
1472         for (i = 0; i < sband->n_channels; i++) {
1473                 if (!(sband->channels[i].flags & IEEE80211_CHAN_NO_80MHZ)) {
1474                         have_80mhz = true;
1475                         break;
1476                 }
1477         }
1478
1479         if (sband->vht_cap.vht_supported && have_80mhz) {
1480                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1481                         goto out_err;
1482                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1483                                                  sband->vht_cap.cap);
1484         }
1485
1486         return pos - buffer;
1487  out_err:
1488         WARN_ONCE(1, "not enough space for preq IEs\n");
1489         return pos - buffer;
1490 }
1491
1492 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1493                              size_t buffer_len,
1494                              struct ieee80211_scan_ies *ie_desc,
1495                              const u8 *ie, size_t ie_len,
1496                              u8 bands_used, u32 *rate_masks,
1497                              struct cfg80211_chan_def *chandef)
1498 {
1499         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1500         int i;
1501
1502         memset(ie_desc, 0, sizeof(*ie_desc));
1503
1504         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1505                 if (bands_used & BIT(i)) {
1506                         pos += ieee80211_build_preq_ies_band(local,
1507                                                              buffer + pos,
1508                                                              buffer_len - pos,
1509                                                              ie, ie_len, i,
1510                                                              rate_masks[i],
1511                                                              chandef,
1512                                                              &custom_ie_offset);
1513                         ie_desc->ies[i] = buffer + old_pos;
1514                         ie_desc->len[i] = pos - old_pos;
1515                         old_pos = pos;
1516                 }
1517         }
1518
1519         /* add any remaining custom IEs */
1520         if (ie && ie_len) {
1521                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1522                               "not enough space for preq custom IEs\n"))
1523                         return pos;
1524                 memcpy(buffer + pos, ie + custom_ie_offset,
1525                        ie_len - custom_ie_offset);
1526                 ie_desc->common_ies = buffer + pos;
1527                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1528                 pos += ie_len - custom_ie_offset;
1529         }
1530
1531         return pos;
1532 };
1533
1534 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1535                                           const u8 *src, const u8 *dst,
1536                                           u32 ratemask,
1537                                           struct ieee80211_channel *chan,
1538                                           const u8 *ssid, size_t ssid_len,
1539                                           const u8 *ie, size_t ie_len,
1540                                           bool directed)
1541 {
1542         struct ieee80211_local *local = sdata->local;
1543         struct cfg80211_chan_def chandef;
1544         struct sk_buff *skb;
1545         struct ieee80211_mgmt *mgmt;
1546         int ies_len;
1547         u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1548         struct ieee80211_scan_ies dummy_ie_desc;
1549
1550         /*
1551          * Do not send DS Channel parameter for directed probe requests
1552          * in order to maximize the chance that we get a response.  Some
1553          * badly-behaved APs don't respond when this parameter is included.
1554          */
1555         chandef.width = sdata->vif.bss_conf.chandef.width;
1556         if (directed)
1557                 chandef.chan = NULL;
1558         else
1559                 chandef.chan = chan;
1560
1561         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1562                                      100 + ie_len);
1563         if (!skb)
1564                 return NULL;
1565
1566         rate_masks[chan->band] = ratemask;
1567         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1568                                            skb_tailroom(skb), &dummy_ie_desc,
1569                                            ie, ie_len, BIT(chan->band),
1570                                            rate_masks, &chandef);
1571         skb_put(skb, ies_len);
1572
1573         if (dst) {
1574                 mgmt = (struct ieee80211_mgmt *) skb->data;
1575                 memcpy(mgmt->da, dst, ETH_ALEN);
1576                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1577         }
1578
1579         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1580
1581         return skb;
1582 }
1583
1584 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1585                               const u8 *src, const u8 *dst,
1586                               const u8 *ssid, size_t ssid_len,
1587                               const u8 *ie, size_t ie_len,
1588                               u32 ratemask, bool directed, u32 tx_flags,
1589                               struct ieee80211_channel *channel, bool scan)
1590 {
1591         struct sk_buff *skb;
1592
1593         skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1594                                         ssid, ssid_len,
1595                                         ie, ie_len, directed);
1596         if (skb) {
1597                 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1598                 if (scan)
1599                         ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1600                 else
1601                         ieee80211_tx_skb(sdata, skb);
1602         }
1603 }
1604
1605 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1606                             struct ieee802_11_elems *elems,
1607                             enum ieee80211_band band, u32 *basic_rates)
1608 {
1609         struct ieee80211_supported_band *sband;
1610         size_t num_rates;
1611         u32 supp_rates, rate_flags;
1612         int i, j, shift;
1613         sband = sdata->local->hw.wiphy->bands[band];
1614
1615         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1616         shift = ieee80211_vif_get_shift(&sdata->vif);
1617
1618         if (WARN_ON(!sband))
1619                 return 1;
1620
1621         num_rates = sband->n_bitrates;
1622         supp_rates = 0;
1623         for (i = 0; i < elems->supp_rates_len +
1624                      elems->ext_supp_rates_len; i++) {
1625                 u8 rate = 0;
1626                 int own_rate;
1627                 bool is_basic;
1628                 if (i < elems->supp_rates_len)
1629                         rate = elems->supp_rates[i];
1630                 else if (elems->ext_supp_rates)
1631                         rate = elems->ext_supp_rates
1632                                 [i - elems->supp_rates_len];
1633                 own_rate = 5 * (rate & 0x7f);
1634                 is_basic = !!(rate & 0x80);
1635
1636                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1637                         continue;
1638
1639                 for (j = 0; j < num_rates; j++) {
1640                         int brate;
1641                         if ((rate_flags & sband->bitrates[j].flags)
1642                             != rate_flags)
1643                                 continue;
1644
1645                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1646                                              1 << shift);
1647
1648                         if (brate == own_rate) {
1649                                 supp_rates |= BIT(j);
1650                                 if (basic_rates && is_basic)
1651                                         *basic_rates |= BIT(j);
1652                         }
1653                 }
1654         }
1655         return supp_rates;
1656 }
1657
1658 void ieee80211_stop_device(struct ieee80211_local *local)
1659 {
1660         ieee80211_led_radio(local, false);
1661         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1662
1663         cancel_work_sync(&local->reconfig_filter);
1664
1665         flush_workqueue(local->workqueue);
1666         drv_stop(local);
1667 }
1668
1669 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1670 {
1671         struct ieee80211_sub_if_data *sdata;
1672         struct ieee80211_chanctx *ctx;
1673
1674         /*
1675          * We get here if during resume the device can't be restarted properly.
1676          * We might also get here if this happens during HW reset, which is a
1677          * slightly different situation and we need to drop all connections in
1678          * the latter case.
1679          *
1680          * Ask cfg80211 to turn off all interfaces, this will result in more
1681          * warnings but at least we'll then get into a clean stopped state.
1682          */
1683
1684         local->resuming = false;
1685         local->suspended = false;
1686         local->started = false;
1687
1688         /* scheduled scan clearly can't be running any more, but tell
1689          * cfg80211 and clear local state
1690          */
1691         ieee80211_sched_scan_end(local);
1692
1693         list_for_each_entry(sdata, &local->interfaces, list)
1694                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1695
1696         /* Mark channel contexts as not being in the driver any more to avoid
1697          * removing them from the driver during the shutdown process...
1698          */
1699         mutex_lock(&local->chanctx_mtx);
1700         list_for_each_entry(ctx, &local->chanctx_list, list)
1701                 ctx->driver_present = false;
1702         mutex_unlock(&local->chanctx_mtx);
1703
1704         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1705 }
1706
1707 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1708                                      struct ieee80211_sub_if_data *sdata)
1709 {
1710         struct ieee80211_chanctx_conf *conf;
1711         struct ieee80211_chanctx *ctx;
1712
1713         if (!local->use_chanctx)
1714                 return;
1715
1716         mutex_lock(&local->chanctx_mtx);
1717         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1718                                          lockdep_is_held(&local->chanctx_mtx));
1719         if (conf) {
1720                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1721                 drv_assign_vif_chanctx(local, sdata, ctx);
1722         }
1723         mutex_unlock(&local->chanctx_mtx);
1724 }
1725
1726 int ieee80211_reconfig(struct ieee80211_local *local)
1727 {
1728         struct ieee80211_hw *hw = &local->hw;
1729         struct ieee80211_sub_if_data *sdata;
1730         struct ieee80211_chanctx *ctx;
1731         struct sta_info *sta;
1732         int res, i;
1733         bool reconfig_due_to_wowlan = false;
1734         struct ieee80211_sub_if_data *sched_scan_sdata;
1735         struct cfg80211_sched_scan_request *sched_scan_req;
1736         bool sched_scan_stopped = false;
1737
1738 #ifdef CONFIG_PM
1739         if (local->suspended)
1740                 local->resuming = true;
1741
1742         if (local->wowlan) {
1743                 res = drv_resume(local);
1744                 local->wowlan = false;
1745                 if (res < 0) {
1746                         local->resuming = false;
1747                         return res;
1748                 }
1749                 if (res == 0)
1750                         goto wake_up;
1751                 WARN_ON(res > 1);
1752                 /*
1753                  * res is 1, which means the driver requested
1754                  * to go through a regular reset on wakeup.
1755                  */
1756                 reconfig_due_to_wowlan = true;
1757         }
1758 #endif
1759         /* everything else happens only if HW was up & running */
1760         if (!local->open_count)
1761                 goto wake_up;
1762
1763         /*
1764          * Upon resume hardware can sometimes be goofy due to
1765          * various platform / driver / bus issues, so restarting
1766          * the device may at times not work immediately. Propagate
1767          * the error.
1768          */
1769         res = drv_start(local);
1770         if (res) {
1771                 if (local->suspended)
1772                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1773                 else
1774                         WARN(1, "Hardware became unavailable during restart.\n");
1775                 ieee80211_handle_reconfig_failure(local);
1776                 return res;
1777         }
1778
1779         /* setup fragmentation threshold */
1780         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1781
1782         /* setup RTS threshold */
1783         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1784
1785         /* reset coverage class */
1786         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1787
1788         ieee80211_led_radio(local, true);
1789         ieee80211_mod_tpt_led_trig(local,
1790                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1791
1792         /* add interfaces */
1793         sdata = rtnl_dereference(local->monitor_sdata);
1794         if (sdata) {
1795                 /* in HW restart it exists already */
1796                 WARN_ON(local->resuming);
1797                 res = drv_add_interface(local, sdata);
1798                 if (WARN_ON(res)) {
1799                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1800                         synchronize_net();
1801                         kfree(sdata);
1802                 }
1803         }
1804
1805         list_for_each_entry(sdata, &local->interfaces, list) {
1806                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1807                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1808                     ieee80211_sdata_running(sdata))
1809                         res = drv_add_interface(local, sdata);
1810         }
1811
1812         /* add channel contexts */
1813         if (local->use_chanctx) {
1814                 mutex_lock(&local->chanctx_mtx);
1815                 list_for_each_entry(ctx, &local->chanctx_list, list)
1816                         if (ctx->replace_state !=
1817                             IEEE80211_CHANCTX_REPLACES_OTHER)
1818                                 WARN_ON(drv_add_chanctx(local, ctx));
1819                 mutex_unlock(&local->chanctx_mtx);
1820
1821                 list_for_each_entry(sdata, &local->interfaces, list) {
1822                         if (!ieee80211_sdata_running(sdata))
1823                                 continue;
1824                         ieee80211_assign_chanctx(local, sdata);
1825                 }
1826
1827                 sdata = rtnl_dereference(local->monitor_sdata);
1828                 if (sdata && ieee80211_sdata_running(sdata))
1829                         ieee80211_assign_chanctx(local, sdata);
1830         }
1831
1832         /* add STAs back */
1833         mutex_lock(&local->sta_mtx);
1834         list_for_each_entry(sta, &local->sta_list, list) {
1835                 enum ieee80211_sta_state state;
1836
1837                 if (!sta->uploaded)
1838                         continue;
1839
1840                 /* AP-mode stations will be added later */
1841                 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1842                         continue;
1843
1844                 for (state = IEEE80211_STA_NOTEXIST;
1845                      state < sta->sta_state; state++)
1846                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1847                                               state + 1));
1848         }
1849         mutex_unlock(&local->sta_mtx);
1850
1851         /* reconfigure tx conf */
1852         if (hw->queues >= IEEE80211_NUM_ACS) {
1853                 list_for_each_entry(sdata, &local->interfaces, list) {
1854                         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1855                             sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1856                             !ieee80211_sdata_running(sdata))
1857                                 continue;
1858
1859                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1860                                 drv_conf_tx(local, sdata, i,
1861                                             &sdata->tx_conf[i]);
1862                 }
1863         }
1864
1865         /* reconfigure hardware */
1866         ieee80211_hw_config(local, ~0);
1867
1868         ieee80211_configure_filter(local);
1869
1870         /* Finally also reconfigure all the BSS information */
1871         list_for_each_entry(sdata, &local->interfaces, list) {
1872                 u32 changed;
1873
1874                 if (!ieee80211_sdata_running(sdata))
1875                         continue;
1876
1877                 /* common change flags for all interface types */
1878                 changed = BSS_CHANGED_ERP_CTS_PROT |
1879                           BSS_CHANGED_ERP_PREAMBLE |
1880                           BSS_CHANGED_ERP_SLOT |
1881                           BSS_CHANGED_HT |
1882                           BSS_CHANGED_BASIC_RATES |
1883                           BSS_CHANGED_BEACON_INT |
1884                           BSS_CHANGED_BSSID |
1885                           BSS_CHANGED_CQM |
1886                           BSS_CHANGED_QOS |
1887                           BSS_CHANGED_IDLE |
1888                           BSS_CHANGED_TXPOWER;
1889
1890                 switch (sdata->vif.type) {
1891                 case NL80211_IFTYPE_STATION:
1892                         changed |= BSS_CHANGED_ASSOC |
1893                                    BSS_CHANGED_ARP_FILTER |
1894                                    BSS_CHANGED_PS;
1895
1896                         /* Re-send beacon info report to the driver */
1897                         if (sdata->u.mgd.have_beacon)
1898                                 changed |= BSS_CHANGED_BEACON_INFO;
1899
1900                         sdata_lock(sdata);
1901                         ieee80211_bss_info_change_notify(sdata, changed);
1902                         sdata_unlock(sdata);
1903                         break;
1904                 case NL80211_IFTYPE_OCB:
1905                         changed |= BSS_CHANGED_OCB;
1906                         ieee80211_bss_info_change_notify(sdata, changed);
1907                         break;
1908                 case NL80211_IFTYPE_ADHOC:
1909                         changed |= BSS_CHANGED_IBSS;
1910                         /* fall through */
1911                 case NL80211_IFTYPE_AP:
1912                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1913
1914                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
1915                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
1916
1917                                 if (rcu_access_pointer(sdata->u.ap.beacon))
1918                                         drv_start_ap(local, sdata);
1919                         }
1920
1921                         /* fall through */
1922                 case NL80211_IFTYPE_MESH_POINT:
1923                         if (sdata->vif.bss_conf.enable_beacon) {
1924                                 changed |= BSS_CHANGED_BEACON |
1925                                            BSS_CHANGED_BEACON_ENABLED;
1926                                 ieee80211_bss_info_change_notify(sdata, changed);
1927                         }
1928                         break;
1929                 case NL80211_IFTYPE_WDS:
1930                 case NL80211_IFTYPE_AP_VLAN:
1931                 case NL80211_IFTYPE_MONITOR:
1932                 case NL80211_IFTYPE_P2P_DEVICE:
1933                         /* nothing to do */
1934                         break;
1935                 case NL80211_IFTYPE_UNSPECIFIED:
1936                 case NUM_NL80211_IFTYPES:
1937                 case NL80211_IFTYPE_P2P_CLIENT:
1938                 case NL80211_IFTYPE_P2P_GO:
1939                         WARN_ON(1);
1940                         break;
1941                 }
1942         }
1943
1944         ieee80211_recalc_ps(local, -1);
1945
1946         /*
1947          * The sta might be in psm against the ap (e.g. because
1948          * this was the state before a hw restart), so we
1949          * explicitly send a null packet in order to make sure
1950          * it'll sync against the ap (and get out of psm).
1951          */
1952         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1953                 list_for_each_entry(sdata, &local->interfaces, list) {
1954                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
1955                                 continue;
1956                         if (!sdata->u.mgd.associated)
1957                                 continue;
1958
1959                         ieee80211_send_nullfunc(local, sdata, 0);
1960                 }
1961         }
1962
1963         /* APs are now beaconing, add back stations */
1964         mutex_lock(&local->sta_mtx);
1965         list_for_each_entry(sta, &local->sta_list, list) {
1966                 enum ieee80211_sta_state state;
1967
1968                 if (!sta->uploaded)
1969                         continue;
1970
1971                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1972                         continue;
1973
1974                 for (state = IEEE80211_STA_NOTEXIST;
1975                      state < sta->sta_state; state++)
1976                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1977                                               state + 1));
1978         }
1979         mutex_unlock(&local->sta_mtx);
1980
1981         /* add back keys */
1982         list_for_each_entry(sdata, &local->interfaces, list)
1983                 if (ieee80211_sdata_running(sdata))
1984                         ieee80211_enable_keys(sdata);
1985
1986  wake_up:
1987         local->in_reconfig = false;
1988         barrier();
1989
1990         if (local->monitors == local->open_count && local->monitors > 0)
1991                 ieee80211_add_virtual_monitor(local);
1992
1993         /*
1994          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
1995          * sessions can be established after a resume.
1996          *
1997          * Also tear down aggregation sessions since reconfiguring
1998          * them in a hardware restart scenario is not easily done
1999          * right now, and the hardware will have lost information
2000          * about the sessions, but we and the AP still think they
2001          * are active. This is really a workaround though.
2002          */
2003         if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
2004                 mutex_lock(&local->sta_mtx);
2005
2006                 list_for_each_entry(sta, &local->sta_list, list) {
2007                         ieee80211_sta_tear_down_BA_sessions(
2008                                         sta, AGG_STOP_LOCAL_REQUEST);
2009                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2010                 }
2011
2012                 mutex_unlock(&local->sta_mtx);
2013         }
2014
2015         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2016                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2017                                         false);
2018
2019         /*
2020          * Reconfigure sched scan if it was interrupted by FW restart or
2021          * suspend.
2022          */
2023         mutex_lock(&local->mtx);
2024         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2025                                                 lockdep_is_held(&local->mtx));
2026         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2027                                                 lockdep_is_held(&local->mtx));
2028         if (sched_scan_sdata && sched_scan_req)
2029                 /*
2030                  * Sched scan stopped, but we don't want to report it. Instead,
2031                  * we're trying to reschedule.
2032                  */
2033                 if (__ieee80211_request_sched_scan_start(sched_scan_sdata,
2034                                                          sched_scan_req))
2035                         sched_scan_stopped = true;
2036         mutex_unlock(&local->mtx);
2037
2038         if (sched_scan_stopped)
2039                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2040
2041         /*
2042          * If this is for hw restart things are still running.
2043          * We may want to change that later, however.
2044          */
2045         if (!local->suspended || reconfig_due_to_wowlan)
2046                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2047
2048         if (!local->suspended)
2049                 return 0;
2050
2051 #ifdef CONFIG_PM
2052         /* first set suspended false, then resuming */
2053         local->suspended = false;
2054         mb();
2055         local->resuming = false;
2056
2057         if (!reconfig_due_to_wowlan)
2058                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2059
2060         list_for_each_entry(sdata, &local->interfaces, list) {
2061                 if (!ieee80211_sdata_running(sdata))
2062                         continue;
2063                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2064                         ieee80211_sta_restart(sdata);
2065         }
2066
2067         mod_timer(&local->sta_cleanup, jiffies + 1);
2068 #else
2069         WARN_ON(1);
2070 #endif
2071
2072         return 0;
2073 }
2074
2075 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2076 {
2077         struct ieee80211_sub_if_data *sdata;
2078         struct ieee80211_local *local;
2079         struct ieee80211_key *key;
2080
2081         if (WARN_ON(!vif))
2082                 return;
2083
2084         sdata = vif_to_sdata(vif);
2085         local = sdata->local;
2086
2087         if (WARN_ON(!local->resuming))
2088                 return;
2089
2090         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2091                 return;
2092
2093         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2094
2095         mutex_lock(&local->key_mtx);
2096         list_for_each_entry(key, &sdata->key_list, list)
2097                 key->flags |= KEY_FLAG_TAINTED;
2098         mutex_unlock(&local->key_mtx);
2099 }
2100 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2101
2102 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2103 {
2104         struct ieee80211_local *local = sdata->local;
2105         struct ieee80211_chanctx_conf *chanctx_conf;
2106         struct ieee80211_chanctx *chanctx;
2107
2108         mutex_lock(&local->chanctx_mtx);
2109
2110         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2111                                         lockdep_is_held(&local->chanctx_mtx));
2112
2113         if (WARN_ON_ONCE(!chanctx_conf))
2114                 goto unlock;
2115
2116         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2117         ieee80211_recalc_smps_chanctx(local, chanctx);
2118  unlock:
2119         mutex_unlock(&local->chanctx_mtx);
2120 }
2121
2122 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2123 {
2124         struct ieee80211_local *local = sdata->local;
2125         struct ieee80211_chanctx_conf *chanctx_conf;
2126         struct ieee80211_chanctx *chanctx;
2127
2128         mutex_lock(&local->chanctx_mtx);
2129
2130         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2131                                         lockdep_is_held(&local->chanctx_mtx));
2132
2133         if (WARN_ON_ONCE(!chanctx_conf))
2134                 goto unlock;
2135
2136         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2137         ieee80211_recalc_chanctx_min_def(local, chanctx);
2138  unlock:
2139         mutex_unlock(&local->chanctx_mtx);
2140 }
2141
2142 static bool ieee80211_id_in_list(const u8 *ids, int n_ids, u8 id)
2143 {
2144         int i;
2145
2146         for (i = 0; i < n_ids; i++)
2147                 if (ids[i] == id)
2148                         return true;
2149         return false;
2150 }
2151
2152 size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
2153                               const u8 *ids, int n_ids,
2154                               const u8 *after_ric, int n_after_ric,
2155                               size_t offset)
2156 {
2157         size_t pos = offset;
2158
2159         while (pos < ielen && ieee80211_id_in_list(ids, n_ids, ies[pos])) {
2160                 if (ies[pos] == WLAN_EID_RIC_DATA && n_after_ric) {
2161                         pos += 2 + ies[pos + 1];
2162
2163                         while (pos < ielen &&
2164                                !ieee80211_id_in_list(after_ric, n_after_ric,
2165                                                      ies[pos]))
2166                                 pos += 2 + ies[pos + 1];
2167                 } else {
2168                         pos += 2 + ies[pos + 1];
2169                 }
2170         }
2171
2172         return pos;
2173 }
2174
2175 size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
2176                           const u8 *ids, int n_ids, size_t offset)
2177 {
2178         return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
2179 }
2180 EXPORT_SYMBOL(ieee80211_ie_split);
2181
2182 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2183 {
2184         size_t pos = offset;
2185
2186         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2187                 pos += 2 + ies[pos + 1];
2188
2189         return pos;
2190 }
2191
2192 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2193                                             int rssi_min_thold,
2194                                             int rssi_max_thold)
2195 {
2196         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2197
2198         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2199                 return;
2200
2201         /*
2202          * Scale up threshold values before storing it, as the RSSI averaging
2203          * algorithm uses a scaled up value as well. Change this scaling
2204          * factor if the RSSI averaging algorithm changes.
2205          */
2206         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2207         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2208 }
2209
2210 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2211                                     int rssi_min_thold,
2212                                     int rssi_max_thold)
2213 {
2214         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2215
2216         WARN_ON(rssi_min_thold == rssi_max_thold ||
2217                 rssi_min_thold > rssi_max_thold);
2218
2219         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2220                                        rssi_max_thold);
2221 }
2222 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2223
2224 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2225 {
2226         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2227
2228         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2229 }
2230 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2231
2232 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2233                               u16 cap)
2234 {
2235         __le16 tmp;
2236
2237         *pos++ = WLAN_EID_HT_CAPABILITY;
2238         *pos++ = sizeof(struct ieee80211_ht_cap);
2239         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2240
2241         /* capability flags */
2242         tmp = cpu_to_le16(cap);
2243         memcpy(pos, &tmp, sizeof(u16));
2244         pos += sizeof(u16);
2245
2246         /* AMPDU parameters */
2247         *pos++ = ht_cap->ampdu_factor |
2248                  (ht_cap->ampdu_density <<
2249                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2250
2251         /* MCS set */
2252         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2253         pos += sizeof(ht_cap->mcs);
2254
2255         /* extended capabilities */
2256         pos += sizeof(__le16);
2257
2258         /* BF capabilities */
2259         pos += sizeof(__le32);
2260
2261         /* antenna selection */
2262         pos += sizeof(u8);
2263
2264         return pos;
2265 }
2266
2267 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2268                                u32 cap)
2269 {
2270         __le32 tmp;
2271
2272         *pos++ = WLAN_EID_VHT_CAPABILITY;
2273         *pos++ = sizeof(struct ieee80211_vht_cap);
2274         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2275
2276         /* capability flags */
2277         tmp = cpu_to_le32(cap);
2278         memcpy(pos, &tmp, sizeof(u32));
2279         pos += sizeof(u32);
2280
2281         /* VHT MCS set */
2282         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2283         pos += sizeof(vht_cap->vht_mcs);
2284
2285         return pos;
2286 }
2287
2288 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2289                                const struct cfg80211_chan_def *chandef,
2290                                u16 prot_mode)
2291 {
2292         struct ieee80211_ht_operation *ht_oper;
2293         /* Build HT Information */
2294         *pos++ = WLAN_EID_HT_OPERATION;
2295         *pos++ = sizeof(struct ieee80211_ht_operation);
2296         ht_oper = (struct ieee80211_ht_operation *)pos;
2297         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2298                                         chandef->chan->center_freq);
2299         switch (chandef->width) {
2300         case NL80211_CHAN_WIDTH_160:
2301         case NL80211_CHAN_WIDTH_80P80:
2302         case NL80211_CHAN_WIDTH_80:
2303         case NL80211_CHAN_WIDTH_40:
2304                 if (chandef->center_freq1 > chandef->chan->center_freq)
2305                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2306                 else
2307                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2308                 break;
2309         default:
2310                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2311                 break;
2312         }
2313         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2314             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2315             chandef->width != NL80211_CHAN_WIDTH_20)
2316                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2317
2318         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2319         ht_oper->stbc_param = 0x0000;
2320
2321         /* It seems that Basic MCS set and Supported MCS set
2322            are identical for the first 10 bytes */
2323         memset(&ht_oper->basic_set, 0, 16);
2324         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2325
2326         return pos + sizeof(struct ieee80211_ht_operation);
2327 }
2328
2329 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2330                                   const struct ieee80211_ht_operation *ht_oper,
2331                                   struct cfg80211_chan_def *chandef)
2332 {
2333         enum nl80211_channel_type channel_type;
2334
2335         if (!ht_oper) {
2336                 cfg80211_chandef_create(chandef, control_chan,
2337                                         NL80211_CHAN_NO_HT);
2338                 return;
2339         }
2340
2341         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2342         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2343                 channel_type = NL80211_CHAN_HT20;
2344                 break;
2345         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2346                 channel_type = NL80211_CHAN_HT40PLUS;
2347                 break;
2348         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2349                 channel_type = NL80211_CHAN_HT40MINUS;
2350                 break;
2351         default:
2352                 channel_type = NL80211_CHAN_NO_HT;
2353         }
2354
2355         cfg80211_chandef_create(chandef, control_chan, channel_type);
2356 }
2357
2358 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2359                              const struct ieee80211_supported_band *sband,
2360                              const u8 *srates, int srates_len, u32 *rates)
2361 {
2362         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2363         int shift = ieee80211_chandef_get_shift(chandef);
2364         struct ieee80211_rate *br;
2365         int brate, rate, i, j, count = 0;
2366
2367         *rates = 0;
2368
2369         for (i = 0; i < srates_len; i++) {
2370                 rate = srates[i] & 0x7f;
2371
2372                 for (j = 0; j < sband->n_bitrates; j++) {
2373                         br = &sband->bitrates[j];
2374                         if ((rate_flags & br->flags) != rate_flags)
2375                                 continue;
2376
2377                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2378                         if (brate == rate) {
2379                                 *rates |= BIT(j);
2380                                 count++;
2381                                 break;
2382                         }
2383                 }
2384         }
2385         return count;
2386 }
2387
2388 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2389                             struct sk_buff *skb, bool need_basic,
2390                             enum ieee80211_band band)
2391 {
2392         struct ieee80211_local *local = sdata->local;
2393         struct ieee80211_supported_band *sband;
2394         int rate, shift;
2395         u8 i, rates, *pos;
2396         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2397         u32 rate_flags;
2398
2399         shift = ieee80211_vif_get_shift(&sdata->vif);
2400         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2401         sband = local->hw.wiphy->bands[band];
2402         rates = 0;
2403         for (i = 0; i < sband->n_bitrates; i++) {
2404                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2405                         continue;
2406                 rates++;
2407         }
2408         if (rates > 8)
2409                 rates = 8;
2410
2411         if (skb_tailroom(skb) < rates + 2)
2412                 return -ENOMEM;
2413
2414         pos = skb_put(skb, rates + 2);
2415         *pos++ = WLAN_EID_SUPP_RATES;
2416         *pos++ = rates;
2417         for (i = 0; i < rates; i++) {
2418                 u8 basic = 0;
2419                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2420                         continue;
2421
2422                 if (need_basic && basic_rates & BIT(i))
2423                         basic = 0x80;
2424                 rate = sband->bitrates[i].bitrate;
2425                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2426                                     5 * (1 << shift));
2427                 *pos++ = basic | (u8) rate;
2428         }
2429
2430         return 0;
2431 }
2432
2433 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2434                                 struct sk_buff *skb, bool need_basic,
2435                                 enum ieee80211_band band)
2436 {
2437         struct ieee80211_local *local = sdata->local;
2438         struct ieee80211_supported_band *sband;
2439         int rate, shift;
2440         u8 i, exrates, *pos;
2441         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2442         u32 rate_flags;
2443
2444         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2445         shift = ieee80211_vif_get_shift(&sdata->vif);
2446
2447         sband = local->hw.wiphy->bands[band];
2448         exrates = 0;
2449         for (i = 0; i < sband->n_bitrates; i++) {
2450                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2451                         continue;
2452                 exrates++;
2453         }
2454
2455         if (exrates > 8)
2456                 exrates -= 8;
2457         else
2458                 exrates = 0;
2459
2460         if (skb_tailroom(skb) < exrates + 2)
2461                 return -ENOMEM;
2462
2463         if (exrates) {
2464                 pos = skb_put(skb, exrates + 2);
2465                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2466                 *pos++ = exrates;
2467                 for (i = 8; i < sband->n_bitrates; i++) {
2468                         u8 basic = 0;
2469                         if ((rate_flags & sband->bitrates[i].flags)
2470                             != rate_flags)
2471                                 continue;
2472                         if (need_basic && basic_rates & BIT(i))
2473                                 basic = 0x80;
2474                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2475                                             5 * (1 << shift));
2476                         *pos++ = basic | (u8) rate;
2477                 }
2478         }
2479         return 0;
2480 }
2481
2482 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2483 {
2484         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2485         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2486
2487         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2488                 /* non-managed type inferfaces */
2489                 return 0;
2490         }
2491         return ifmgd->ave_beacon_signal / 16;
2492 }
2493 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2494
2495 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2496 {
2497         if (!mcs)
2498                 return 1;
2499
2500         /* TODO: consider rx_highest */
2501
2502         if (mcs->rx_mask[3])
2503                 return 4;
2504         if (mcs->rx_mask[2])
2505                 return 3;
2506         if (mcs->rx_mask[1])
2507                 return 2;
2508         return 1;
2509 }
2510
2511 /**
2512  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2513  * @local: mac80211 hw info struct
2514  * @status: RX status
2515  * @mpdu_len: total MPDU length (including FCS)
2516  * @mpdu_offset: offset into MPDU to calculate timestamp at
2517  *
2518  * This function calculates the RX timestamp at the given MPDU offset, taking
2519  * into account what the RX timestamp was. An offset of 0 will just normalize
2520  * the timestamp to TSF at beginning of MPDU reception.
2521  */
2522 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2523                                      struct ieee80211_rx_status *status,
2524                                      unsigned int mpdu_len,
2525                                      unsigned int mpdu_offset)
2526 {
2527         u64 ts = status->mactime;
2528         struct rate_info ri;
2529         u16 rate;
2530
2531         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2532                 return 0;
2533
2534         memset(&ri, 0, sizeof(ri));
2535
2536         /* Fill cfg80211 rate info */
2537         if (status->flag & RX_FLAG_HT) {
2538                 ri.mcs = status->rate_idx;
2539                 ri.flags |= RATE_INFO_FLAGS_MCS;
2540                 if (status->flag & RX_FLAG_40MHZ)
2541                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2542                 if (status->flag & RX_FLAG_SHORT_GI)
2543                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2544         } else if (status->flag & RX_FLAG_VHT) {
2545                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2546                 ri.mcs = status->rate_idx;
2547                 ri.nss = status->vht_nss;
2548                 if (status->flag & RX_FLAG_40MHZ)
2549                         ri.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
2550                 if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2551                         ri.flags |= RATE_INFO_FLAGS_80_MHZ_WIDTH;
2552                 if (status->vht_flag & RX_VHT_FLAG_80P80MHZ)
2553                         ri.flags |= RATE_INFO_FLAGS_80P80_MHZ_WIDTH;
2554                 if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2555                         ri.flags |= RATE_INFO_FLAGS_160_MHZ_WIDTH;
2556                 if (status->flag & RX_FLAG_SHORT_GI)
2557                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2558         } else {
2559                 struct ieee80211_supported_band *sband;
2560                 int shift = 0;
2561                 int bitrate;
2562
2563                 if (status->flag & RX_FLAG_10MHZ)
2564                         shift = 1;
2565                 if (status->flag & RX_FLAG_5MHZ)
2566                         shift = 2;
2567
2568                 sband = local->hw.wiphy->bands[status->band];
2569                 bitrate = sband->bitrates[status->rate_idx].bitrate;
2570                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2571         }
2572
2573         rate = cfg80211_calculate_bitrate(&ri);
2574         if (WARN_ONCE(!rate,
2575                       "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2576                       status->flag, status->rate_idx, status->vht_nss))
2577                 return 0;
2578
2579         /* rewind from end of MPDU */
2580         if (status->flag & RX_FLAG_MACTIME_END)
2581                 ts -= mpdu_len * 8 * 10 / rate;
2582
2583         ts += mpdu_offset * 8 * 10 / rate;
2584
2585         return ts;
2586 }
2587
2588 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2589 {
2590         struct ieee80211_sub_if_data *sdata;
2591         struct cfg80211_chan_def chandef;
2592
2593         mutex_lock(&local->mtx);
2594         mutex_lock(&local->iflist_mtx);
2595         list_for_each_entry(sdata, &local->interfaces, list) {
2596                 /* it might be waiting for the local->mtx, but then
2597                  * by the time it gets it, sdata->wdev.cac_started
2598                  * will no longer be true
2599                  */
2600                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2601
2602                 if (sdata->wdev.cac_started) {
2603                         chandef = sdata->vif.bss_conf.chandef;
2604                         ieee80211_vif_release_channel(sdata);
2605                         cfg80211_cac_event(sdata->dev,
2606                                            &chandef,
2607                                            NL80211_RADAR_CAC_ABORTED,
2608                                            GFP_KERNEL);
2609                 }
2610         }
2611         mutex_unlock(&local->iflist_mtx);
2612         mutex_unlock(&local->mtx);
2613 }
2614
2615 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2616 {
2617         struct ieee80211_local *local =
2618                 container_of(work, struct ieee80211_local, radar_detected_work);
2619         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2620         struct ieee80211_chanctx *ctx;
2621         int num_chanctx = 0;
2622
2623         mutex_lock(&local->chanctx_mtx);
2624         list_for_each_entry(ctx, &local->chanctx_list, list) {
2625                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2626                         continue;
2627
2628                 num_chanctx++;
2629                 chandef = ctx->conf.def;
2630         }
2631         mutex_unlock(&local->chanctx_mtx);
2632
2633         ieee80211_dfs_cac_cancel(local);
2634
2635         if (num_chanctx > 1)
2636                 /* XXX: multi-channel is not supported yet */
2637                 WARN_ON(1);
2638         else
2639                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2640 }
2641
2642 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2643 {
2644         struct ieee80211_local *local = hw_to_local(hw);
2645
2646         trace_api_radar_detected(local);
2647
2648         ieee80211_queue_work(hw, &local->radar_detected_work);
2649 }
2650 EXPORT_SYMBOL(ieee80211_radar_detected);
2651
2652 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2653 {
2654         u32 ret;
2655         int tmp;
2656
2657         switch (c->width) {
2658         case NL80211_CHAN_WIDTH_20:
2659                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2660                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2661                 break;
2662         case NL80211_CHAN_WIDTH_40:
2663                 c->width = NL80211_CHAN_WIDTH_20;
2664                 c->center_freq1 = c->chan->center_freq;
2665                 ret = IEEE80211_STA_DISABLE_40MHZ |
2666                       IEEE80211_STA_DISABLE_VHT;
2667                 break;
2668         case NL80211_CHAN_WIDTH_80:
2669                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2670                 /* n_P40 */
2671                 tmp /= 2;
2672                 /* freq_P40 */
2673                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2674                 c->width = NL80211_CHAN_WIDTH_40;
2675                 ret = IEEE80211_STA_DISABLE_VHT;
2676                 break;
2677         case NL80211_CHAN_WIDTH_80P80:
2678                 c->center_freq2 = 0;
2679                 c->width = NL80211_CHAN_WIDTH_80;
2680                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2681                       IEEE80211_STA_DISABLE_160MHZ;
2682                 break;
2683         case NL80211_CHAN_WIDTH_160:
2684                 /* n_P20 */
2685                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2686                 /* n_P80 */
2687                 tmp /= 4;
2688                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2689                 c->width = NL80211_CHAN_WIDTH_80;
2690                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2691                       IEEE80211_STA_DISABLE_160MHZ;
2692                 break;
2693         default:
2694         case NL80211_CHAN_WIDTH_20_NOHT:
2695                 WARN_ON_ONCE(1);
2696                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2697                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2698                 break;
2699         case NL80211_CHAN_WIDTH_5:
2700         case NL80211_CHAN_WIDTH_10:
2701                 WARN_ON_ONCE(1);
2702                 /* keep c->width */
2703                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2704                 break;
2705         }
2706
2707         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2708
2709         return ret;
2710 }
2711
2712 /*
2713  * Returns true if smps_mode_new is strictly more restrictive than
2714  * smps_mode_old.
2715  */
2716 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2717                                    enum ieee80211_smps_mode smps_mode_new)
2718 {
2719         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2720                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2721                 return false;
2722
2723         switch (smps_mode_old) {
2724         case IEEE80211_SMPS_STATIC:
2725                 return false;
2726         case IEEE80211_SMPS_DYNAMIC:
2727                 return smps_mode_new == IEEE80211_SMPS_STATIC;
2728         case IEEE80211_SMPS_OFF:
2729                 return smps_mode_new != IEEE80211_SMPS_OFF;
2730         default:
2731                 WARN_ON(1);
2732         }
2733
2734         return false;
2735 }
2736
2737 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2738                               struct cfg80211_csa_settings *csa_settings)
2739 {
2740         struct sk_buff *skb;
2741         struct ieee80211_mgmt *mgmt;
2742         struct ieee80211_local *local = sdata->local;
2743         int freq;
2744         int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2745                                sizeof(mgmt->u.action.u.chan_switch);
2746         u8 *pos;
2747
2748         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2749             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2750                 return -EOPNOTSUPP;
2751
2752         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2753                             5 + /* channel switch announcement element */
2754                             3 + /* secondary channel offset element */
2755                             8); /* mesh channel switch parameters element */
2756         if (!skb)
2757                 return -ENOMEM;
2758
2759         skb_reserve(skb, local->tx_headroom);
2760         mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2761         memset(mgmt, 0, hdr_len);
2762         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2763                                           IEEE80211_STYPE_ACTION);
2764
2765         eth_broadcast_addr(mgmt->da);
2766         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2767         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2768                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2769         } else {
2770                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2771                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2772         }
2773         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2774         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2775         pos = skb_put(skb, 5);
2776         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
2777         *pos++ = 3;                                             /* IE length */
2778         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
2779         freq = csa_settings->chandef.chan->center_freq;
2780         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
2781         *pos++ = csa_settings->count;                           /* count */
2782
2783         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2784                 enum nl80211_channel_type ch_type;
2785
2786                 skb_put(skb, 3);
2787                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
2788                 *pos++ = 1;                                     /* IE length */
2789                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2790                 if (ch_type == NL80211_CHAN_HT40PLUS)
2791                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2792                 else
2793                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2794         }
2795
2796         if (ieee80211_vif_is_mesh(&sdata->vif)) {
2797                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2798
2799                 skb_put(skb, 8);
2800                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
2801                 *pos++ = 6;                                     /* IE length */
2802                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
2803                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
2804                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2805                 *pos++ |= csa_settings->block_tx ?
2806                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2807                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2808                 pos += 2;
2809                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2810                 pos += 2;
2811         }
2812
2813         ieee80211_tx_skb(sdata, skb);
2814         return 0;
2815 }
2816
2817 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2818 {
2819         return !(cs == NULL || cs->cipher == 0 ||
2820                  cs->hdr_len < cs->pn_len + cs->pn_off ||
2821                  cs->hdr_len <= cs->key_idx_off ||
2822                  cs->key_idx_shift > 7 ||
2823                  cs->key_idx_mask == 0);
2824 }
2825
2826 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2827 {
2828         int i;
2829
2830         /* Ensure we have enough iftype bitmap space for all iftype values */
2831         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2832
2833         for (i = 0; i < n; i++)
2834                 if (!ieee80211_cs_valid(&cs[i]))
2835                         return false;
2836
2837         return true;
2838 }
2839
2840 const struct ieee80211_cipher_scheme *
2841 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2842                  enum nl80211_iftype iftype)
2843 {
2844         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2845         int n = local->hw.n_cipher_schemes;
2846         int i;
2847         const struct ieee80211_cipher_scheme *cs = NULL;
2848
2849         for (i = 0; i < n; i++) {
2850                 if (l[i].cipher == cipher) {
2851                         cs = &l[i];
2852                         break;
2853                 }
2854         }
2855
2856         if (!cs || !(cs->iftype & BIT(iftype)))
2857                 return NULL;
2858
2859         return cs;
2860 }
2861
2862 int ieee80211_cs_headroom(struct ieee80211_local *local,
2863                           struct cfg80211_crypto_settings *crypto,
2864                           enum nl80211_iftype iftype)
2865 {
2866         const struct ieee80211_cipher_scheme *cs;
2867         int headroom = IEEE80211_ENCRYPT_HEADROOM;
2868         int i;
2869
2870         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2871                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2872                                       iftype);
2873
2874                 if (cs && headroom < cs->hdr_len)
2875                         headroom = cs->hdr_len;
2876         }
2877
2878         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2879         if (cs && headroom < cs->hdr_len)
2880                 headroom = cs->hdr_len;
2881
2882         return headroom;
2883 }
2884
2885 static bool
2886 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2887 {
2888         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2889         int skip;
2890
2891         if (end > 0)
2892                 return false;
2893
2894         /* End time is in the past, check for repetitions */
2895         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2896         if (data->count[i] < 255) {
2897                 if (data->count[i] <= skip) {
2898                         data->count[i] = 0;
2899                         return false;
2900                 }
2901
2902                 data->count[i] -= skip;
2903         }
2904
2905         data->desc[i].start += skip * data->desc[i].interval;
2906
2907         return true;
2908 }
2909
2910 static bool
2911 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
2912                              s32 *offset)
2913 {
2914         bool ret = false;
2915         int i;
2916
2917         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2918                 s32 cur;
2919
2920                 if (!data->count[i])
2921                         continue;
2922
2923                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
2924                         ret = true;
2925
2926                 cur = data->desc[i].start - tsf;
2927                 if (cur > *offset)
2928                         continue;
2929
2930                 cur = data->desc[i].start + data->desc[i].duration - tsf;
2931                 if (cur > *offset)
2932                         *offset = cur;
2933         }
2934
2935         return ret;
2936 }
2937
2938 static u32
2939 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
2940 {
2941         s32 offset = 0;
2942         int tries = 0;
2943         /*
2944          * arbitrary limit, used to avoid infinite loops when combined NoA
2945          * descriptors cover the full time period.
2946          */
2947         int max_tries = 5;
2948
2949         ieee80211_extend_absent_time(data, tsf, &offset);
2950         do {
2951                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
2952                         break;
2953
2954                 tries++;
2955         } while (tries < max_tries);
2956
2957         return offset;
2958 }
2959
2960 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
2961 {
2962         u32 next_offset = BIT(31) - 1;
2963         int i;
2964
2965         data->absent = 0;
2966         data->has_next_tsf = false;
2967         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
2968                 s32 start;
2969
2970                 if (!data->count[i])
2971                         continue;
2972
2973                 ieee80211_extend_noa_desc(data, tsf, i);
2974                 start = data->desc[i].start - tsf;
2975                 if (start <= 0)
2976                         data->absent |= BIT(i);
2977
2978                 if (next_offset > start)
2979                         next_offset = start;
2980
2981                 data->has_next_tsf = true;
2982         }
2983
2984         if (data->absent)
2985                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
2986
2987         data->next_tsf = tsf + next_offset;
2988 }
2989 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
2990
2991 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
2992                             struct ieee80211_noa_data *data, u32 tsf)
2993 {
2994         int ret = 0;
2995         int i;
2996
2997         memset(data, 0, sizeof(*data));
2998
2999         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3000                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3001
3002                 if (!desc->count || !desc->duration)
3003                         continue;
3004
3005                 data->count[i] = desc->count;
3006                 data->desc[i].start = le32_to_cpu(desc->start_time);
3007                 data->desc[i].duration = le32_to_cpu(desc->duration);
3008                 data->desc[i].interval = le32_to_cpu(desc->interval);
3009
3010                 if (data->count[i] > 1 &&
3011                     data->desc[i].interval < data->desc[i].duration)
3012                         continue;
3013
3014                 ieee80211_extend_noa_desc(data, tsf, i);
3015                 ret++;
3016         }
3017
3018         if (ret)
3019                 ieee80211_update_p2p_noa(data, tsf);
3020
3021         return ret;
3022 }
3023 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3024
3025 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3026                            struct ieee80211_sub_if_data *sdata)
3027 {
3028         u64 tsf = drv_get_tsf(local, sdata);
3029         u64 dtim_count = 0;
3030         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3031         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3032         struct ps_data *ps;
3033         u8 bcns_from_dtim;
3034
3035         if (tsf == -1ULL || !beacon_int || !dtim_period)
3036                 return;
3037
3038         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3039             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3040                 if (!sdata->bss)
3041                         return;
3042
3043                 ps = &sdata->bss->ps;
3044         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3045                 ps = &sdata->u.mesh.ps;
3046         } else {
3047                 return;
3048         }
3049
3050         /*
3051          * actually finds last dtim_count, mac80211 will update in
3052          * __beacon_add_tim().
3053          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3054          */
3055         do_div(tsf, beacon_int);
3056         bcns_from_dtim = do_div(tsf, dtim_period);
3057         /* just had a DTIM */
3058         if (!bcns_from_dtim)
3059                 dtim_count = 0;
3060         else
3061                 dtim_count = dtim_period - bcns_from_dtim;
3062
3063         ps->dtim_count = dtim_count;
3064 }
3065
3066 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3067                                          struct ieee80211_chanctx *ctx)
3068 {
3069         struct ieee80211_sub_if_data *sdata;
3070         u8 radar_detect = 0;
3071
3072         lockdep_assert_held(&local->chanctx_mtx);
3073
3074         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3075                 return 0;
3076
3077         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3078                 if (sdata->reserved_radar_required)
3079                         radar_detect |= BIT(sdata->reserved_chandef.width);
3080
3081         /*
3082          * An in-place reservation context should not have any assigned vifs
3083          * until it replaces the other context.
3084          */
3085         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3086                 !list_empty(&ctx->assigned_vifs));
3087
3088         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3089                 if (sdata->radar_required)
3090                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3091
3092         return radar_detect;
3093 }
3094
3095 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3096                                  const struct cfg80211_chan_def *chandef,
3097                                  enum ieee80211_chanctx_mode chanmode,
3098                                  u8 radar_detect)
3099 {
3100         struct ieee80211_local *local = sdata->local;
3101         struct ieee80211_sub_if_data *sdata_iter;
3102         enum nl80211_iftype iftype = sdata->wdev.iftype;
3103         int num[NUM_NL80211_IFTYPES];
3104         struct ieee80211_chanctx *ctx;
3105         int num_different_channels = 0;
3106         int total = 1;
3107
3108         lockdep_assert_held(&local->chanctx_mtx);
3109
3110         if (WARN_ON(hweight32(radar_detect) > 1))
3111                 return -EINVAL;
3112
3113         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3114                     !chandef->chan))
3115                 return -EINVAL;
3116
3117         if (chandef)
3118                 num_different_channels = 1;
3119
3120         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3121                 return -EINVAL;
3122
3123         /* Always allow software iftypes */
3124         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3125                 if (radar_detect)
3126                         return -EINVAL;
3127                 return 0;
3128         }
3129
3130         memset(num, 0, sizeof(num));
3131
3132         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3133                 num[iftype] = 1;
3134
3135         list_for_each_entry(ctx, &local->chanctx_list, list) {
3136                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3137                         continue;
3138                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3139                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3140                         num_different_channels++;
3141                         continue;
3142                 }
3143                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3144                     cfg80211_chandef_compatible(chandef,
3145                                                 &ctx->conf.def))
3146                         continue;
3147                 num_different_channels++;
3148         }
3149
3150         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3151                 struct wireless_dev *wdev_iter;
3152
3153                 wdev_iter = &sdata_iter->wdev;
3154
3155                 if (sdata_iter == sdata ||
3156                     rcu_access_pointer(sdata_iter->vif.chanctx_conf) == NULL ||
3157                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3158                         continue;
3159
3160                 num[wdev_iter->iftype]++;
3161                 total++;
3162         }
3163
3164         if (total == 1 && !radar_detect)
3165                 return 0;
3166
3167         return cfg80211_check_combinations(local->hw.wiphy,
3168                                            num_different_channels,
3169                                            radar_detect, num);
3170 }
3171
3172 static void
3173 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3174                          void *data)
3175 {
3176         u32 *max_num_different_channels = data;
3177
3178         *max_num_different_channels = max(*max_num_different_channels,
3179                                           c->num_different_channels);
3180 }
3181
3182 int ieee80211_max_num_channels(struct ieee80211_local *local)
3183 {
3184         struct ieee80211_sub_if_data *sdata;
3185         int num[NUM_NL80211_IFTYPES] = {};
3186         struct ieee80211_chanctx *ctx;
3187         int num_different_channels = 0;
3188         u8 radar_detect = 0;
3189         u32 max_num_different_channels = 1;
3190         int err;
3191
3192         lockdep_assert_held(&local->chanctx_mtx);
3193
3194         list_for_each_entry(ctx, &local->chanctx_list, list) {
3195                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3196                         continue;
3197
3198                 num_different_channels++;
3199
3200                 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3201         }
3202
3203         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3204                 num[sdata->wdev.iftype]++;
3205
3206         err = cfg80211_iter_combinations(local->hw.wiphy,
3207                                          num_different_channels, radar_detect,
3208                                          num, ieee80211_iter_max_chans,
3209                                          &max_num_different_channels);
3210         if (err < 0)
3211                 return err;
3212
3213         return max_num_different_channels;
3214 }
3215
3216 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3217 {
3218         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3219         *buf++ = 7; /* len */
3220         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3221         *buf++ = 0x50;
3222         *buf++ = 0xf2;
3223         *buf++ = 2; /* WME */
3224         *buf++ = 0; /* WME info */
3225         *buf++ = 1; /* WME ver */
3226         *buf++ = qosinfo; /* U-APSD no in use */
3227
3228         return buf;
3229 }