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  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   8  * Copyright (C) 2018-2019 Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * utilities for mac80211
  15  */
  16
  17 #include <net/mac80211.h>
  18 #include <linux/netdevice.h>
  19 #include <linux/export.h>
  20 #include <linux/types.h>
  21 #include <linux/slab.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/if_arp.h>
  25 #include <linux/bitmap.h>
  26 #include <linux/crc32.h>
  27 #include <net/net_namespace.h>
  28 #include <net/cfg80211.h>
  29 #include <net/rtnetlink.h>
  30
  31 #include "ieee80211_i.h"
  32 #include "driver-ops.h"
  33 #include "rate.h"
  34 #include "mesh.h"
  35 #include "wme.h"
  36 #include "led.h"
  37 #include "wep.h"
  38
  39 /* privid for wiphys to determine whether they belong to us or not */
  40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  41
  42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  43 {
  44         struct ieee80211_local *local;
  45         BUG_ON(!wiphy);
  46
  47         local = wiphy_priv(wiphy);
  48         return &local->hw;
  49 }
  50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  51
  52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  53 {
  54         struct sk_buff *skb;
  55         struct ieee80211_hdr *hdr;
  56
  57         skb_queue_walk(&tx->skbs, skb) {
  58                 hdr = (struct ieee80211_hdr *) skb->data;
  59                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  60         }
  61 }
  62
  63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  64                              int rate, int erp, int short_preamble,
  65                              int shift)
  66 {
  67         int dur;
  68
  69         /* calculate duration (in microseconds, rounded up to next higher
  70          * integer if it includes a fractional microsecond) to send frame of
  71          * len bytes (does not include FCS) at the given rate. Duration will
  72          * also include SIFS.
  73          *
  74          * rate is in 100 kbps, so divident is multiplied by 10 in the
  75          * DIV_ROUND_UP() operations.
  76          *
  77          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  78          * is assumed to be 0 otherwise.
  79          */
  80
  81         if (band == NL80211_BAND_5GHZ || erp) {
  82                 /*
  83                  * OFDM:
  84                  *
  85                  * N_DBPS = DATARATE x 4
  86                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  87                  *      (16 = SIGNAL time, 6 = tail bits)
  88                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  89                  *
  90                  * T_SYM = 4 usec
  91                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  92                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  93                  *      signal ext = 6 usec
  94                  */
  95                 dur = 16; /* SIFS + signal ext */
  96                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  97                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  98
  99                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 100                  *  * times 4 for 5 MHz
 101                  *  * times 2 for 10 MHz
 102                  */
 103                 dur *= 1 << shift;
 104
 105                 /* rates should already consider the channel bandwidth,
 106                  * don't apply divisor again.
 107                  */
 108                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 109                                         4 * rate); /* T_SYM x N_SYM */
 110         } else {
 111                 /*
 112                  * 802.11b or 802.11g with 802.11b compatibility:
 113                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 114                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 115                  *
 116                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 117                  * aSIFSTime = 10 usec
 118                  * aPreambleLength = 144 usec or 72 usec with short preamble
 119                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 120                  */
 121                 dur = 10; /* aSIFSTime = 10 usec */
 122                 dur += short_preamble ? (72 + 24) : (144 + 48);
 123
 124                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 125         }
 126
 127         return dur;
 128 }
 129
 130 /* Exported duration function for driver use */
 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 132                                         struct ieee80211_vif *vif,
 133                                         enum nl80211_band band,
 134                                         size_t frame_len,
 135                                         struct ieee80211_rate *rate)
 136 {
 137         struct ieee80211_sub_if_data *sdata;
 138         u16 dur;
 139         int erp, shift = 0;
 140         bool short_preamble = false;
 141
 142         erp = 0;
 143         if (vif) {
 144                 sdata = vif_to_sdata(vif);
 145                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 146                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 147                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 148                 shift = ieee80211_vif_get_shift(vif);
 149         }
 150
 151         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 152                                        short_preamble, shift);
 153
 154         return cpu_to_le16(dur);
 155 }
 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 157
 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 159                               struct ieee80211_vif *vif, size_t frame_len,
 160                               const struct ieee80211_tx_info *frame_txctl)
 161 {
 162         struct ieee80211_local *local = hw_to_local(hw);
 163         struct ieee80211_rate *rate;
 164         struct ieee80211_sub_if_data *sdata;
 165         bool short_preamble;
 166         int erp, shift = 0, bitrate;
 167         u16 dur;
 168         struct ieee80211_supported_band *sband;
 169
 170         sband = local->hw.wiphy->bands[frame_txctl->band];
 171
 172         short_preamble = false;
 173
 174         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 175
 176         erp = 0;
 177         if (vif) {
 178                 sdata = vif_to_sdata(vif);
 179                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 180                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 181                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 182                 shift = ieee80211_vif_get_shift(vif);
 183         }
 184
 185         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 186
 187         /* CTS duration */
 188         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 189                                        erp, short_preamble, shift);
 190         /* Data frame duration */
 191         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 192                                         erp, short_preamble, shift);
 193         /* ACK duration */
 194         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 195                                         erp, short_preamble, shift);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_rts_duration);
 200
 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 202                                     struct ieee80211_vif *vif,
 203                                     size_t frame_len,
 204                                     const struct ieee80211_tx_info *frame_txctl)
 205 {
 206         struct ieee80211_local *local = hw_to_local(hw);
 207         struct ieee80211_rate *rate;
 208         struct ieee80211_sub_if_data *sdata;
 209         bool short_preamble;
 210         int erp, shift = 0, bitrate;
 211         u16 dur;
 212         struct ieee80211_supported_band *sband;
 213
 214         sband = local->hw.wiphy->bands[frame_txctl->band];
 215
 216         short_preamble = false;
 217
 218         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225                 shift = ieee80211_vif_get_shift(vif);
 226         }
 227
 228         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 229
 230         /* Data frame duration */
 231         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 232                                        erp, short_preamble, shift);
 233         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 234                 /* ACK duration */
 235                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 236                                                 erp, short_preamble, shift);
 237         }
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 242
 243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 244 {
 245         struct ieee80211_local *local = sdata->local;
 246         struct ieee80211_vif *vif = &sdata->vif;
 247         struct fq *fq = &local->fq;
 248         struct ps_data *ps = NULL;
 249         struct txq_info *txqi;
 250         struct sta_info *sta;
 251         int i;
 252
 253         spin_lock_bh(&fq->lock);
 254
 255         if (sdata->vif.type == NL80211_IFTYPE_AP)
 256                 ps = &sdata->bss->ps;
 257
 258         sdata->vif.txqs_stopped[ac] = false;
 259
 260         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 261                 if (sdata != sta->sdata)
 262                         continue;
 263
 264                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 265                         struct ieee80211_txq *txq = sta->sta.txq[i];
 266
 267                         if (!txq)
 268                                 continue;
 269
 270                         txqi = to_txq_info(txq);
 271
 272                         if (ac != txq->ac)
 273                                 continue;
 274
 275                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 276                                                 &txqi->flags))
 277                                 continue;
 278
 279                         spin_unlock_bh(&fq->lock);
 280                         drv_wake_tx_queue(local, txqi);
 281                         spin_lock_bh(&fq->lock);
 282                 }
 283         }
 284
 285         if (!vif->txq)
 286                 goto out;
 287
 288         txqi = to_txq_info(vif->txq);
 289
 290         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 291             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 292                 goto out;
 293
 294         spin_unlock_bh(&fq->lock);
 295
 296         drv_wake_tx_queue(local, txqi);
 297         return;
 298 out:
 299         spin_unlock_bh(&fq->lock);
 300 }
 301
 302 static void
 303 __releases(&local->queue_stop_reason_lock)
 304 __acquires(&local->queue_stop_reason_lock)
 305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 306 {
 307         struct ieee80211_sub_if_data *sdata;
 308         int n_acs = IEEE80211_NUM_ACS;
 309         int i;
 310
 311         rcu_read_lock();
 312
 313         if (local->hw.queues < IEEE80211_NUM_ACS)
 314                 n_acs = 1;
 315
 316         for (i = 0; i < local->hw.queues; i++) {
 317                 if (local->queue_stop_reasons[i])
 318                         continue;
 319
 320                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 321                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 322                         int ac;
 323
 324                         for (ac = 0; ac < n_acs; ac++) {
 325                                 int ac_queue = sdata->vif.hw_queue[ac];
 326
 327                                 if (ac_queue == i ||
 328                                     sdata->vif.cab_queue == i)
 329                                         __ieee80211_wake_txqs(sdata, ac);
 330                         }
 331                 }
 332                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 333         }
 334
 335         rcu_read_unlock();
 336 }
 337
 338 void ieee80211_wake_txqs(unsigned long data)
 339 {
 340         struct ieee80211_local *local = (struct ieee80211_local *)data;
 341         unsigned long flags;
 342
 343         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 344         _ieee80211_wake_txqs(local, &flags);
 345         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 346 }
 347
 348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 349 {
 350         struct ieee80211_sub_if_data *sdata;
 351         int n_acs = IEEE80211_NUM_ACS;
 352
 353         if (local->ops->wake_tx_queue)
 354                 return;
 355
 356         if (local->hw.queues < IEEE80211_NUM_ACS)
 357                 n_acs = 1;
 358
 359         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 360                 int ac;
 361
 362                 if (!sdata->dev)
 363                         continue;
 364
 365                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 366                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 367                         continue;
 368
 369                 for (ac = 0; ac < n_acs; ac++) {
 370                         int ac_queue = sdata->vif.hw_queue[ac];
 371
 372                         if (ac_queue == queue ||
 373                             (sdata->vif.cab_queue == queue &&
 374                              local->queue_stop_reasons[ac_queue] == 0 &&
 375                              skb_queue_empty(&local->pending[ac_queue])))
 376                                 netif_wake_subqueue(sdata->dev, ac);
 377                 }
 378         }
 379 }
 380
 381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 382                                    enum queue_stop_reason reason,
 383                                    bool refcounted,
 384                                    unsigned long *flags)
 385 {
 386         struct ieee80211_local *local = hw_to_local(hw);
 387
 388         trace_wake_queue(local, queue, reason);
 389
 390         if (WARN_ON(queue >= hw->queues))
 391                 return;
 392
 393         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 394                 return;
 395
 396         if (!refcounted) {
 397                 local->q_stop_reasons[queue][reason] = 0;
 398         } else {
 399                 local->q_stop_reasons[queue][reason]--;
 400                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 401                         local->q_stop_reasons[queue][reason] = 0;
 402         }
 403
 404         if (local->q_stop_reasons[queue][reason] == 0)
 405                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 406
 407         if (local->queue_stop_reasons[queue] != 0)
 408                 /* someone still has this queue stopped */
 409                 return;
 410
 411         if (skb_queue_empty(&local->pending[queue])) {
 412                 rcu_read_lock();
 413                 ieee80211_propagate_queue_wake(local, queue);
 414                 rcu_read_unlock();
 415         } else
 416                 tasklet_schedule(&local->tx_pending_tasklet);
 417
 418         /*
 419          * Calling _ieee80211_wake_txqs here can be a problem because it may
 420          * release queue_stop_reason_lock which has been taken by
 421          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 422          * release someone's lock, but it is fine because all the callers of
 423          * __ieee80211_wake_queue call it right before releasing the lock.
 424          */
 425         if (local->ops->wake_tx_queue) {
 426                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 427                         tasklet_schedule(&local->wake_txqs_tasklet);
 428                 else
 429                         _ieee80211_wake_txqs(local, flags);
 430         }
 431 }
 432
 433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 434                                     enum queue_stop_reason reason,
 435                                     bool refcounted)
 436 {
 437         struct ieee80211_local *local = hw_to_local(hw);
 438         unsigned long flags;
 439
 440         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 441         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 442         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 443 }
 444
 445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 446 {
 447         ieee80211_wake_queue_by_reason(hw, queue,
 448                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 449                                        false);
 450 }
 451 EXPORT_SYMBOL(ieee80211_wake_queue);
 452
 453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 454                                    enum queue_stop_reason reason,
 455                                    bool refcounted)
 456 {
 457         struct ieee80211_local *local = hw_to_local(hw);
 458         struct ieee80211_sub_if_data *sdata;
 459         int n_acs = IEEE80211_NUM_ACS;
 460
 461         trace_stop_queue(local, queue, reason);
 462
 463         if (WARN_ON(queue >= hw->queues))
 464                 return;
 465
 466         if (!refcounted)
 467                 local->q_stop_reasons[queue][reason] = 1;
 468         else
 469                 local->q_stop_reasons[queue][reason]++;
 470
 471         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 472                 return;
 473
 474         if (local->hw.queues < IEEE80211_NUM_ACS)
 475                 n_acs = 1;
 476
 477         rcu_read_lock();
 478         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 479                 int ac;
 480
 481                 if (!sdata->dev)
 482                         continue;
 483
 484                 for (ac = 0; ac < n_acs; ac++) {
 485                         if (sdata->vif.hw_queue[ac] == queue ||
 486                             sdata->vif.cab_queue == queue) {
 487                                 if (!local->ops->wake_tx_queue) {
 488                                         netif_stop_subqueue(sdata->dev, ac);
 489                                         continue;
 490                                 }
 491                                 spin_lock(&local->fq.lock);
 492                                 sdata->vif.txqs_stopped[ac] = true;
 493                                 spin_unlock(&local->fq.lock);
 494                         }
 495                 }
 496         }
 497         rcu_read_unlock();
 498 }
 499
 500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 501                                     enum queue_stop_reason reason,
 502                                     bool refcounted)
 503 {
 504         struct ieee80211_local *local = hw_to_local(hw);
 505         unsigned long flags;
 506
 507         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 508         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 509         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 510 }
 511
 512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 513 {
 514         ieee80211_stop_queue_by_reason(hw, queue,
 515                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 516                                        false);
 517 }
 518 EXPORT_SYMBOL(ieee80211_stop_queue);
 519
 520 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 521                                struct sk_buff *skb)
 522 {
 523         struct ieee80211_hw *hw = &local->hw;
 524         unsigned long flags;
 525         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 526         int queue = info->hw_queue;
 527
 528         if (WARN_ON(!info->control.vif)) {
 529                 ieee80211_free_txskb(&local->hw, skb);
 530                 return;
 531         }
 532
 533         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 534         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 535                                false);
 536         __skb_queue_tail(&local->pending[queue], skb);
 537         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 538                                false, &flags);
 539         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 540 }
 541
 542 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 543                                 struct sk_buff_head *skbs)
 544 {
 545         struct ieee80211_hw *hw = &local->hw;
 546         struct sk_buff *skb;
 547         unsigned long flags;
 548         int queue, i;
 549
 550         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 551         while ((skb = skb_dequeue(skbs))) {
 552                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 553
 554                 if (WARN_ON(!info->control.vif)) {
 555                         ieee80211_free_txskb(&local->hw, skb);
 556                         continue;
 557                 }
 558
 559                 queue = info->hw_queue;
 560
 561                 __ieee80211_stop_queue(hw, queue,
 562                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 563                                 false);
 564
 565                 __skb_queue_tail(&local->pending[queue], skb);
 566         }
 567
 568         for (i = 0; i < hw->queues; i++)
 569                 __ieee80211_wake_queue(hw, i,
 570                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 571                         false, &flags);
 572         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 573 }
 574
 575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 576                                      unsigned long queues,
 577                                      enum queue_stop_reason reason,
 578                                      bool refcounted)
 579 {
 580         struct ieee80211_local *local = hw_to_local(hw);
 581         unsigned long flags;
 582         int i;
 583
 584         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 585
 586         for_each_set_bit(i, &queues, hw->queues)
 587                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 588
 589         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 590 }
 591
 592 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 593 {
 594         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 595                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 596                                         false);
 597 }
 598 EXPORT_SYMBOL(ieee80211_stop_queues);
 599
 600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 601 {
 602         struct ieee80211_local *local = hw_to_local(hw);
 603         unsigned long flags;
 604         int ret;
 605
 606         if (WARN_ON(queue >= hw->queues))
 607                 return true;
 608
 609         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 610         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 611                        &local->queue_stop_reasons[queue]);
 612         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 613         return ret;
 614 }
 615 EXPORT_SYMBOL(ieee80211_queue_stopped);
 616
 617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 618                                      unsigned long queues,
 619                                      enum queue_stop_reason reason,
 620                                      bool refcounted)
 621 {
 622         struct ieee80211_local *local = hw_to_local(hw);
 623         unsigned long flags;
 624         int i;
 625
 626         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 627
 628         for_each_set_bit(i, &queues, hw->queues)
 629                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 630
 631         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 632 }
 633
 634 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 635 {
 636         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 637                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 638                                         false);
 639 }
 640 EXPORT_SYMBOL(ieee80211_wake_queues);
 641
 642 static unsigned int
 643 ieee80211_get_vif_queues(struct ieee80211_local *local,
 644                          struct ieee80211_sub_if_data *sdata)
 645 {
 646         unsigned int queues;
 647
 648         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 649                 int ac;
 650
 651                 queues = 0;
 652
 653                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 654                         queues |= BIT(sdata->vif.hw_queue[ac]);
 655                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 656                         queues |= BIT(sdata->vif.cab_queue);
 657         } else {
 658                 /* all queues */
 659                 queues = BIT(local->hw.queues) - 1;
 660         }
 661
 662         return queues;
 663 }
 664
 665 void __ieee80211_flush_queues(struct ieee80211_local *local,
 666                               struct ieee80211_sub_if_data *sdata,
 667                               unsigned int queues, bool drop)
 668 {
 669         if (!local->ops->flush)
 670                 return;
 671
 672         /*
 673          * If no queue was set, or if the HW doesn't support
 674          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 675          */
 676         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 677                 queues = ieee80211_get_vif_queues(local, sdata);
 678
 679         ieee80211_stop_queues_by_reason(&local->hw, queues,
 680                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 681                                         false);
 682
 683         drv_flush(local, sdata, queues, drop);
 684
 685         ieee80211_wake_queues_by_reason(&local->hw, queues,
 686                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 687                                         false);
 688 }
 689
 690 void ieee80211_flush_queues(struct ieee80211_local *local,
 691                             struct ieee80211_sub_if_data *sdata, bool drop)
 692 {
 693         __ieee80211_flush_queues(local, sdata, 0, drop);
 694 }
 695
 696 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 697                                struct ieee80211_sub_if_data *sdata,
 698                                enum queue_stop_reason reason)
 699 {
 700         ieee80211_stop_queues_by_reason(&local->hw,
 701                                         ieee80211_get_vif_queues(local, sdata),
 702                                         reason, true);
 703 }
 704
 705 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 706                                struct ieee80211_sub_if_data *sdata,
 707                                enum queue_stop_reason reason)
 708 {
 709         ieee80211_wake_queues_by_reason(&local->hw,
 710                                         ieee80211_get_vif_queues(local, sdata),
 711                                         reason, true);
 712 }
 713
 714 static void __iterate_interfaces(struct ieee80211_local *local,
 715                                  u32 iter_flags,
 716                                  void (*iterator)(void *data, u8 *mac,
 717                                                   struct ieee80211_vif *vif),
 718                                  void *data)
 719 {
 720         struct ieee80211_sub_if_data *sdata;
 721         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 722
 723         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 724                 switch (sdata->vif.type) {
 725                 case NL80211_IFTYPE_MONITOR:
 726                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 727                                 continue;
 728                         break;
 729                 case NL80211_IFTYPE_AP_VLAN:
 730                         continue;
 731                 default:
 732                         break;
 733                 }
 734                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 735                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 736                         continue;
 737                 if (ieee80211_sdata_running(sdata) || !active_only)
 738                         iterator(data, sdata->vif.addr,
 739                                  &sdata->vif);
 740         }
 741
 742         sdata = rcu_dereference_check(local->monitor_sdata,
 743                                       lockdep_is_held(&local->iflist_mtx) ||
 744                                       lockdep_rtnl_is_held());
 745         if (sdata &&
 746             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 747              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 748                 iterator(data, sdata->vif.addr, &sdata->vif);
 749 }
 750
 751 void ieee80211_iterate_interfaces(
 752         struct ieee80211_hw *hw, u32 iter_flags,
 753         void (*iterator)(void *data, u8 *mac,
 754                          struct ieee80211_vif *vif),
 755         void *data)
 756 {
 757         struct ieee80211_local *local = hw_to_local(hw);
 758
 759         mutex_lock(&local->iflist_mtx);
 760         __iterate_interfaces(local, iter_flags, iterator, data);
 761         mutex_unlock(&local->iflist_mtx);
 762 }
 763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 764
 765 void ieee80211_iterate_active_interfaces_atomic(
 766         struct ieee80211_hw *hw, u32 iter_flags,
 767         void (*iterator)(void *data, u8 *mac,
 768                          struct ieee80211_vif *vif),
 769         void *data)
 770 {
 771         struct ieee80211_local *local = hw_to_local(hw);
 772
 773         rcu_read_lock();
 774         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 775                              iterator, data);
 776         rcu_read_unlock();
 777 }
 778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 779
 780 void ieee80211_iterate_active_interfaces_rtnl(
 781         struct ieee80211_hw *hw, u32 iter_flags,
 782         void (*iterator)(void *data, u8 *mac,
 783                          struct ieee80211_vif *vif),
 784         void *data)
 785 {
 786         struct ieee80211_local *local = hw_to_local(hw);
 787
 788         ASSERT_RTNL();
 789
 790         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 791                              iterator, data);
 792 }
 793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 794
 795 static void __iterate_stations(struct ieee80211_local *local,
 796                                void (*iterator)(void *data,
 797                                                 struct ieee80211_sta *sta),
 798                                void *data)
 799 {
 800         struct sta_info *sta;
 801
 802         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 803                 if (!sta->uploaded)
 804                         continue;
 805
 806                 iterator(data, &sta->sta);
 807         }
 808 }
 809
 810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 811                         void (*iterator)(void *data,
 812                                          struct ieee80211_sta *sta),
 813                         void *data)
 814 {
 815         struct ieee80211_local *local = hw_to_local(hw);
 816
 817         rcu_read_lock();
 818         __iterate_stations(local, iterator, data);
 819         rcu_read_unlock();
 820 }
 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 822
 823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 824 {
 825         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 826
 827         if (!ieee80211_sdata_running(sdata) ||
 828             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 829                 return NULL;
 830         return &sdata->vif;
 831 }
 832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 833
 834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 835 {
 836         struct ieee80211_sub_if_data *sdata;
 837
 838         if (!vif)
 839                 return NULL;
 840
 841         sdata = vif_to_sdata(vif);
 842
 843         if (!ieee80211_sdata_running(sdata) ||
 844             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 845                 return NULL;
 846
 847         return &sdata->wdev;
 848 }
 849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 850
 851 /*
 852  * Nothing should have been stuffed into the workqueue during
 853  * the suspend->resume cycle. Since we can't check each caller
 854  * of this function if we are already quiescing / suspended,
 855  * check here and don't WARN since this can actually happen when
 856  * the rx path (for example) is racing against __ieee80211_suspend
 857  * and suspending / quiescing was set after the rx path checked
 858  * them.
 859  */
 860 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 861 {
 862         if (local->quiescing || (local->suspended && !local->resuming)) {
 863                 pr_warn("queueing ieee80211 work while going to suspend\n");
 864                 return false;
 865         }
 866
 867         return true;
 868 }
 869
 870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 871 {
 872         struct ieee80211_local *local = hw_to_local(hw);
 873
 874         if (!ieee80211_can_queue_work(local))
 875                 return;
 876
 877         queue_work(local->workqueue, work);
 878 }
 879 EXPORT_SYMBOL(ieee80211_queue_work);
 880
 881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 882                                   struct delayed_work *dwork,
 883                                   unsigned long delay)
 884 {
 885         struct ieee80211_local *local = hw_to_local(hw);
 886
 887         if (!ieee80211_can_queue_work(local))
 888                 return;
 889
 890         queue_delayed_work(local->workqueue, dwork, delay);
 891 }
 892 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 893
 894 static u32
 895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 896                             struct ieee802_11_elems *elems,
 897                             u64 filter, u32 crc,
 898                             const struct element *check_inherit)
 899 {
 900         const struct element *elem;
 901         bool calc_crc = filter != 0;
 902         DECLARE_BITMAP(seen_elems, 256);
 903         const u8 *ie;
 904
 905         bitmap_zero(seen_elems, 256);
 906
 907         for_each_element(elem, start, len) {
 908                 bool elem_parse_failed;
 909                 u8 id = elem->id;
 910                 u8 elen = elem->datalen;
 911                 const u8 *pos = elem->data;
 912
 913                 if (check_inherit &&
 914                     !cfg80211_is_element_inherited(elem,
 915                                                    check_inherit))
 916                         continue;
 917
 918                 switch (id) {
 919                 case WLAN_EID_SSID:
 920                 case WLAN_EID_SUPP_RATES:
 921                 case WLAN_EID_FH_PARAMS:
 922                 case WLAN_EID_DS_PARAMS:
 923                 case WLAN_EID_CF_PARAMS:
 924                 case WLAN_EID_TIM:
 925                 case WLAN_EID_IBSS_PARAMS:
 926                 case WLAN_EID_CHALLENGE:
 927                 case WLAN_EID_RSN:
 928                 case WLAN_EID_ERP_INFO:
 929                 case WLAN_EID_EXT_SUPP_RATES:
 930                 case WLAN_EID_HT_CAPABILITY:
 931                 case WLAN_EID_HT_OPERATION:
 932                 case WLAN_EID_VHT_CAPABILITY:
 933                 case WLAN_EID_VHT_OPERATION:
 934                 case WLAN_EID_MESH_ID:
 935                 case WLAN_EID_MESH_CONFIG:
 936                 case WLAN_EID_PEER_MGMT:
 937                 case WLAN_EID_PREQ:
 938                 case WLAN_EID_PREP:
 939                 case WLAN_EID_PERR:
 940                 case WLAN_EID_RANN:
 941                 case WLAN_EID_CHANNEL_SWITCH:
 942                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 943                 case WLAN_EID_COUNTRY:
 944                 case WLAN_EID_PWR_CONSTRAINT:
 945                 case WLAN_EID_TIMEOUT_INTERVAL:
 946                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 947                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 948                 case WLAN_EID_CHAN_SWITCH_PARAM:
 949                 case WLAN_EID_EXT_CAPABILITY:
 950                 case WLAN_EID_CHAN_SWITCH_TIMING:
 951                 case WLAN_EID_LINK_ID:
 952                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 953                 /*
 954                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 955                  * that if the content gets bigger it might be needed more than once
 956                  */
 957                         if (test_bit(id, seen_elems)) {
 958                                 elems->parse_error = true;
 959                                 continue;
 960                         }
 961                         break;
 962                 }
 963
 964                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
 965                         crc = crc32_be(crc, pos - 2, elen + 2);
 966
 967                 elem_parse_failed = false;
 968
 969                 switch (id) {
 970                 case WLAN_EID_LINK_ID:
 971                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
 972                                 elem_parse_failed = true;
 973                                 break;
 974                         }
 975                         elems->lnk_id = (void *)(pos - 2);
 976                         break;
 977                 case WLAN_EID_CHAN_SWITCH_TIMING:
 978                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
 979                                 elem_parse_failed = true;
 980                                 break;
 981                         }
 982                         elems->ch_sw_timing = (void *)pos;
 983                         break;
 984                 case WLAN_EID_EXT_CAPABILITY:
 985                         elems->ext_capab = pos;
 986                         elems->ext_capab_len = elen;
 987                         break;
 988                 case WLAN_EID_SSID:
 989                         elems->ssid = pos;
 990                         elems->ssid_len = elen;
 991                         break;
 992                 case WLAN_EID_SUPP_RATES:
 993                         elems->supp_rates = pos;
 994                         elems->supp_rates_len = elen;
 995                         break;
 996                 case WLAN_EID_DS_PARAMS:
 997                         if (elen >= 1)
 998                                 elems->ds_params = pos;
 999                         else
1000                                 elem_parse_failed = true;
1001                         break;
1002                 case WLAN_EID_TIM:
1003                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1004                                 elems->tim = (void *)pos;
1005                                 elems->tim_len = elen;
1006                         } else
1007                                 elem_parse_failed = true;
1008                         break;
1009                 case WLAN_EID_CHALLENGE:
1010                         elems->challenge = pos;
1011                         elems->challenge_len = elen;
1012                         break;
1013                 case WLAN_EID_VENDOR_SPECIFIC:
1014                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1015                             pos[2] == 0xf2) {
1016                                 /* Microsoft OUI (00:50:F2) */
1017
1018                                 if (calc_crc)
1019                                         crc = crc32_be(crc, pos - 2, elen + 2);
1020
1021                                 if (elen >= 5 && pos[3] == 2) {
1022                                         /* OUI Type 2 - WMM IE */
1023                                         if (pos[4] == 0) {
1024                                                 elems->wmm_info = pos;
1025                                                 elems->wmm_info_len = elen;
1026                                         } else if (pos[4] == 1) {
1027                                                 elems->wmm_param = pos;
1028                                                 elems->wmm_param_len = elen;
1029                                         }
1030                                 }
1031                         }
1032                         break;
1033                 case WLAN_EID_RSN:
1034                         elems->rsn = pos;
1035                         elems->rsn_len = elen;
1036                         break;
1037                 case WLAN_EID_ERP_INFO:
1038                         if (elen >= 1)
1039                                 elems->erp_info = pos;
1040                         else
1041                                 elem_parse_failed = true;
1042                         break;
1043                 case WLAN_EID_EXT_SUPP_RATES:
1044                         elems->ext_supp_rates = pos;
1045                         elems->ext_supp_rates_len = elen;
1046                         break;
1047                 case WLAN_EID_HT_CAPABILITY:
1048                         if (elen >= sizeof(struct ieee80211_ht_cap))
1049                                 elems->ht_cap_elem = (void *)pos;
1050                         else
1051                                 elem_parse_failed = true;
1052                         break;
1053                 case WLAN_EID_HT_OPERATION:
1054                         if (elen >= sizeof(struct ieee80211_ht_operation))
1055                                 elems->ht_operation = (void *)pos;
1056                         else
1057                                 elem_parse_failed = true;
1058                         break;
1059                 case WLAN_EID_VHT_CAPABILITY:
1060                         if (elen >= sizeof(struct ieee80211_vht_cap))
1061                                 elems->vht_cap_elem = (void *)pos;
1062                         else
1063                                 elem_parse_failed = true;
1064                         break;
1065                 case WLAN_EID_VHT_OPERATION:
1066                         if (elen >= sizeof(struct ieee80211_vht_operation))
1067                                 elems->vht_operation = (void *)pos;
1068                         else
1069                                 elem_parse_failed = true;
1070                         break;
1071                 case WLAN_EID_OPMODE_NOTIF:
1072                         if (elen > 0)
1073                                 elems->opmode_notif = pos;
1074                         else
1075                                 elem_parse_failed = true;
1076                         break;
1077                 case WLAN_EID_MESH_ID:
1078                         elems->mesh_id = pos;
1079                         elems->mesh_id_len = elen;
1080                         break;
1081                 case WLAN_EID_MESH_CONFIG:
1082                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1083                                 elems->mesh_config = (void *)pos;
1084                         else
1085                                 elem_parse_failed = true;
1086                         break;
1087                 case WLAN_EID_PEER_MGMT:
1088                         elems->peering = pos;
1089                         elems->peering_len = elen;
1090                         break;
1091                 case WLAN_EID_MESH_AWAKE_WINDOW:
1092                         if (elen >= 2)
1093                                 elems->awake_window = (void *)pos;
1094                         break;
1095                 case WLAN_EID_PREQ:
1096                         elems->preq = pos;
1097                         elems->preq_len = elen;
1098                         break;
1099                 case WLAN_EID_PREP:
1100                         elems->prep = pos;
1101                         elems->prep_len = elen;
1102                         break;
1103                 case WLAN_EID_PERR:
1104                         elems->perr = pos;
1105                         elems->perr_len = elen;
1106                         break;
1107                 case WLAN_EID_RANN:
1108                         if (elen >= sizeof(struct ieee80211_rann_ie))
1109                                 elems->rann = (void *)pos;
1110                         else
1111                                 elem_parse_failed = true;
1112                         break;
1113                 case WLAN_EID_CHANNEL_SWITCH:
1114                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1115                                 elem_parse_failed = true;
1116                                 break;
1117                         }
1118                         elems->ch_switch_ie = (void *)pos;
1119                         break;
1120                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1121                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1122                                 elem_parse_failed = true;
1123                                 break;
1124                         }
1125                         elems->ext_chansw_ie = (void *)pos;
1126                         break;
1127                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1128                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1129                                 elem_parse_failed = true;
1130                                 break;
1131                         }
1132                         elems->sec_chan_offs = (void *)pos;
1133                         break;
1134                 case WLAN_EID_CHAN_SWITCH_PARAM:
1135                         if (elen !=
1136                             sizeof(*elems->mesh_chansw_params_ie)) {
1137                                 elem_parse_failed = true;
1138                                 break;
1139                         }
1140                         elems->mesh_chansw_params_ie = (void *)pos;
1141                         break;
1142                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1143                         if (!action ||
1144                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1145                                 elem_parse_failed = true;
1146                                 break;
1147                         }
1148                         elems->wide_bw_chansw_ie = (void *)pos;
1149                         break;
1150                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1151                         if (action) {
1152                                 elem_parse_failed = true;
1153                                 break;
1154                         }
1155                         /*
1156                          * This is a bit tricky, but as we only care about
1157                          * the wide bandwidth channel switch element, so
1158                          * just parse it out manually.
1159                          */
1160                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1161                                               pos, elen);
1162                         if (ie) {
1163                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1164                                         elems->wide_bw_chansw_ie =
1165                                                 (void *)(ie + 2);
1166                                 else
1167                                         elem_parse_failed = true;
1168                         }
1169                         break;
1170                 case WLAN_EID_COUNTRY:
1171                         elems->country_elem = pos;
1172                         elems->country_elem_len = elen;
1173                         break;
1174                 case WLAN_EID_PWR_CONSTRAINT:
1175                         if (elen != 1) {
1176                                 elem_parse_failed = true;
1177                                 break;
1178                         }
1179                         elems->pwr_constr_elem = pos;
1180                         break;
1181                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1182                         /* Lots of different options exist, but we only care
1183                          * about the Dynamic Transmit Power Control element.
1184                          * First check for the Cisco OUI, then for the DTPC
1185                          * tag (0x00).
1186                          */
1187                         if (elen < 4) {
1188                                 elem_parse_failed = true;
1189                                 break;
1190                         }
1191
1192                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1193                             pos[2] != 0x96 || pos[3] != 0x00)
1194                                 break;
1195
1196                         if (elen != 6) {
1197                                 elem_parse_failed = true;
1198                                 break;
1199                         }
1200
1201                         if (calc_crc)
1202                                 crc = crc32_be(crc, pos - 2, elen + 2);
1203
1204                         elems->cisco_dtpc_elem = pos;
1205                         break;
1206                 case WLAN_EID_TIMEOUT_INTERVAL:
1207                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1208                                 elems->timeout_int = (void *)pos;
1209                         else
1210                                 elem_parse_failed = true;
1211                         break;
1212                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1213                         if (elen >= sizeof(*elems->max_idle_period_ie))
1214                                 elems->max_idle_period_ie = (void *)pos;
1215                         break;
1216                 case WLAN_EID_EXTENSION:
1217                         if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1218                             elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1219                                 elems->mu_edca_param_set = (void *)&pos[1];
1220                                 if (calc_crc)
1221                                         crc = crc32_be(crc, pos - 2, elen + 2);
1222                         } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1223                                 elems->he_cap = (void *)&pos[1];
1224                                 elems->he_cap_len = elen - 1;
1225                         } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1226                                    elen >= sizeof(*elems->he_operation) &&
1227                                    elen >= ieee80211_he_oper_size(&pos[1])) {
1228                                 elems->he_operation = (void *)&pos[1];
1229                         } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1230                                 elems->uora_element = (void *)&pos[1];
1231                         } else if (pos[0] ==
1232                                    WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME &&
1233                                    elen == 4) {
1234                                 elems->max_channel_switch_time = pos + 1;
1235                         } else if (pos[0] ==
1236                                    WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION &&
1237                                    elen == 3) {
1238                                 elems->mbssid_config_ie = (void *)&pos[1];
1239                         }
1240                         break;
1241                 default:
1242                         break;
1243                 }
1244
1245                 if (elem_parse_failed)
1246                         elems->parse_error = true;
1247                 else
1248                         __set_bit(id, seen_elems);
1249         }
1250
1251         if (!for_each_element_completed(elem, start, len))
1252                 elems->parse_error = true;
1253
1254         return crc;
1255 }
1256
1257 static void ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1258                                           struct ieee802_11_elems *elems,
1259                                           u8 *transmitter_bssid,
1260                                           u8 *bss_bssid)
1261 {
1262         const struct element *elem, *sub;
1263
1264         if (!bss_bssid || !transmitter_bssid)
1265                 return;
1266
1267         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1268                 if (elem->datalen < 2)
1269                         continue;
1270
1271                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1272                         u8 new_bssid[ETH_ALEN];
1273                         const u8 *index;
1274
1275                         if (sub->id != 0 || sub->datalen < 4) {
1276                                 /* not a valid BSS profile */
1277                                 continue;
1278                         }
1279
1280                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1281                             sub->data[1] != 2) {
1282                                 /* The first element of the
1283                                  * Nontransmitted BSSID Profile is not
1284                                  * the Nontransmitted BSSID Capability
1285                                  * element.
1286                                  */
1287                                 continue;
1288                         }
1289
1290                         /* found a Nontransmitted BSSID Profile */
1291                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1292                                                  sub->data, sub->datalen);
1293                         if (!index || index[1] < 1 || index[2] == 0) {
1294                                 /* Invalid MBSSID Index element */
1295                                 continue;
1296                         }
1297
1298                         cfg80211_gen_new_bssid(transmitter_bssid,
1299                                                elem->data[0],
1300                                                index[2],
1301                                                new_bssid);
1302                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1303                                 elems->nontransmitted_bssid_profile =
1304                                         elem->data;
1305                                 elems->bssid_index_len = index[1];
1306                                 elems->bssid_index = (void *)&index[2];
1307                                 break;
1308                         }
1309                 }
1310         }
1311 }
1312
1313 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1314                                struct ieee802_11_elems *elems,
1315                                u64 filter, u32 crc, u8 *transmitter_bssid,
1316                                u8 *bss_bssid)
1317 {
1318         const struct element *non_inherit = NULL;
1319
1320         memset(elems, 0, sizeof(*elems));
1321         elems->ie_start = start;
1322         elems->total_len = len;
1323
1324         ieee802_11_find_bssid_profile(start, len, elems, transmitter_bssid,
1325                                       bss_bssid);
1326
1327         if (elems->nontransmitted_bssid_profile)
1328                 non_inherit =
1329                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1330                                                &elems->nontransmitted_bssid_profile[2],
1331                                                elems->nontransmitted_bssid_profile[1]);
1332
1333         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1334                                           crc, non_inherit);
1335
1336         /* Override with nontransmitted profile, if found */
1337         if (transmitter_bssid && elems->nontransmitted_bssid_profile) {
1338                 const u8 *profile = elems->nontransmitted_bssid_profile;
1339
1340                 _ieee802_11_parse_elems_crc(&profile[2], profile[1],
1341                                             action, elems, 0, 0, NULL);
1342         }
1343
1344         if (elems->tim && !elems->parse_error) {
1345                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1346
1347                 elems->dtim_period = tim_ie->dtim_period;
1348                 elems->dtim_count = tim_ie->dtim_count;
1349         }
1350
1351         /* Override DTIM period and count if needed */
1352         if (elems->bssid_index &&
1353             elems->bssid_index_len >=
1354             offsetofend(struct ieee80211_bssid_index, dtim_period))
1355                 elems->dtim_period = elems->bssid_index->dtim_period;
1356
1357         if (elems->bssid_index &&
1358             elems->bssid_index_len >=
1359             offsetofend(struct ieee80211_bssid_index, dtim_count))
1360                 elems->dtim_count = elems->bssid_index->dtim_count;
1361
1362         return crc;
1363 }
1364
1365 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1366                                            struct ieee80211_tx_queue_params
1367                                            *qparam, int ac)
1368 {
1369         struct ieee80211_chanctx_conf *chanctx_conf;
1370         const struct ieee80211_reg_rule *rrule;
1371         const struct ieee80211_wmm_ac *wmm_ac;
1372         u16 center_freq = 0;
1373
1374         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1375             sdata->vif.type != NL80211_IFTYPE_STATION)
1376                 return;
1377
1378         rcu_read_lock();
1379         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1380         if (chanctx_conf)
1381                 center_freq = chanctx_conf->def.chan->center_freq;
1382
1383         if (!center_freq) {
1384                 rcu_read_unlock();
1385                 return;
1386         }
1387
1388         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1389
1390         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1391                 rcu_read_unlock();
1392                 return;
1393         }
1394
1395         if (sdata->vif.type == NL80211_IFTYPE_AP)
1396                 wmm_ac = &rrule->wmm_rule.ap[ac];
1397         else
1398                 wmm_ac = &rrule->wmm_rule.client[ac];
1399         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1400         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1401         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1402         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1403         rcu_read_unlock();
1404 }
1405
1406 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1407                                bool bss_notify, bool enable_qos)
1408 {
1409         struct ieee80211_local *local = sdata->local;
1410         struct ieee80211_tx_queue_params qparam;
1411         struct ieee80211_chanctx_conf *chanctx_conf;
1412         int ac;
1413         bool use_11b;
1414         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1415         int aCWmin, aCWmax;
1416
1417         if (!local->ops->conf_tx)
1418                 return;
1419
1420         if (local->hw.queues < IEEE80211_NUM_ACS)
1421                 return;
1422
1423         memset(&qparam, 0, sizeof(qparam));
1424
1425         rcu_read_lock();
1426         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1427         use_11b = (chanctx_conf &&
1428                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1429                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1430         rcu_read_unlock();
1431
1432         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1433
1434         /* Set defaults according to 802.11-2007 Table 7-37 */
1435         aCWmax = 1023;
1436         if (use_11b)
1437                 aCWmin = 31;
1438         else
1439                 aCWmin = 15;
1440
1441         /* Confiure old 802.11b/g medium access rules. */
1442         qparam.cw_max = aCWmax;
1443         qparam.cw_min = aCWmin;
1444         qparam.txop = 0;
1445         qparam.aifs = 2;
1446
1447         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1448                 /* Update if QoS is enabled. */
1449                 if (enable_qos) {
1450                         switch (ac) {
1451                         case IEEE80211_AC_BK:
1452                                 qparam.cw_max = aCWmax;
1453                                 qparam.cw_min = aCWmin;
1454                                 qparam.txop = 0;
1455                                 if (is_ocb)
1456                                         qparam.aifs = 9;
1457                                 else
1458                                         qparam.aifs = 7;
1459                                 break;
1460                         /* never happens but let's not leave undefined */
1461                         default:
1462                         case IEEE80211_AC_BE:
1463                                 qparam.cw_max = aCWmax;
1464                                 qparam.cw_min = aCWmin;
1465                                 qparam.txop = 0;
1466                                 if (is_ocb)
1467                                         qparam.aifs = 6;
1468                                 else
1469                                         qparam.aifs = 3;
1470                                 break;
1471                         case IEEE80211_AC_VI:
1472                                 qparam.cw_max = aCWmin;
1473                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1474                                 if (is_ocb)
1475                                         qparam.txop = 0;
1476                                 else if (use_11b)
1477                                         qparam.txop = 6016/32;
1478                                 else
1479                                         qparam.txop = 3008/32;
1480
1481                                 if (is_ocb)
1482                                         qparam.aifs = 3;
1483                                 else
1484                                         qparam.aifs = 2;
1485                                 break;
1486                         case IEEE80211_AC_VO:
1487                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1488                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1489                                 if (is_ocb)
1490                                         qparam.txop = 0;
1491                                 else if (use_11b)
1492                                         qparam.txop = 3264/32;
1493                                 else
1494                                         qparam.txop = 1504/32;
1495                                 qparam.aifs = 2;
1496                                 break;
1497                         }
1498                 }
1499                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1500
1501                 qparam.uapsd = false;
1502
1503                 sdata->tx_conf[ac] = qparam;
1504                 drv_conf_tx(local, sdata, ac, &qparam);
1505         }
1506
1507         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1508             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1509             sdata->vif.type != NL80211_IFTYPE_NAN) {
1510                 sdata->vif.bss_conf.qos = enable_qos;
1511                 if (bss_notify)
1512                         ieee80211_bss_info_change_notify(sdata,
1513                                                          BSS_CHANGED_QOS);
1514         }
1515 }
1516
1517 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1518                          u16 transaction, u16 auth_alg, u16 status,
1519                          const u8 *extra, size_t extra_len, const u8 *da,
1520                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1521                          u32 tx_flags)
1522 {
1523         struct ieee80211_local *local = sdata->local;
1524         struct sk_buff *skb;
1525         struct ieee80211_mgmt *mgmt;
1526         int err;
1527
1528         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1529         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1530                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1531         if (!skb)
1532                 return;
1533
1534         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1535
1536         mgmt = skb_put_zero(skb, 24 + 6);
1537         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1538                                           IEEE80211_STYPE_AUTH);
1539         memcpy(mgmt->da, da, ETH_ALEN);
1540         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1541         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1542         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1543         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1544         mgmt->u.auth.status_code = cpu_to_le16(status);
1545         if (extra)
1546                 skb_put_data(skb, extra, extra_len);
1547
1548         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1549                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1550                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1551                 WARN_ON(err);
1552         }
1553
1554         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1555                                         tx_flags;
1556         ieee80211_tx_skb(sdata, skb);
1557 }
1558
1559 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1560                                     const u8 *bssid, u16 stype, u16 reason,
1561                                     bool send_frame, u8 *frame_buf)
1562 {
1563         struct ieee80211_local *local = sdata->local;
1564         struct sk_buff *skb;
1565         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1566
1567         /* build frame */
1568         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1569         mgmt->duration = 0; /* initialize only */
1570         mgmt->seq_ctrl = 0; /* initialize only */
1571         memcpy(mgmt->da, bssid, ETH_ALEN);
1572         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1573         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1574         /* u.deauth.reason_code == u.disassoc.reason_code */
1575         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1576
1577         if (send_frame) {
1578                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1579                                     IEEE80211_DEAUTH_FRAME_LEN);
1580                 if (!skb)
1581                         return;
1582
1583                 skb_reserve(skb, local->hw.extra_tx_headroom);
1584
1585                 /* copy in frame */
1586                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1587
1588                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1589                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1590                         IEEE80211_SKB_CB(skb)->flags |=
1591                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1592
1593                 ieee80211_tx_skb(sdata, skb);
1594         }
1595 }
1596
1597 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1598                                          u8 *buffer, size_t buffer_len,
1599                                          const u8 *ie, size_t ie_len,
1600                                          enum nl80211_band band,
1601                                          u32 rate_mask,
1602                                          struct cfg80211_chan_def *chandef,
1603                                          size_t *offset, u32 flags)
1604 {
1605         struct ieee80211_supported_band *sband;
1606         const struct ieee80211_sta_he_cap *he_cap;
1607         u8 *pos = buffer, *end = buffer + buffer_len;
1608         size_t noffset;
1609         int supp_rates_len, i;
1610         u8 rates[32];
1611         int num_rates;
1612         int ext_rates_len;
1613         int shift;
1614         u32 rate_flags;
1615         bool have_80mhz = false;
1616
1617         *offset = 0;
1618
1619         sband = local->hw.wiphy->bands[band];
1620         if (WARN_ON_ONCE(!sband))
1621                 return 0;
1622
1623         rate_flags = ieee80211_chandef_rate_flags(chandef);
1624         shift = ieee80211_chandef_get_shift(chandef);
1625
1626         num_rates = 0;
1627         for (i = 0; i < sband->n_bitrates; i++) {
1628                 if ((BIT(i) & rate_mask) == 0)
1629                         continue; /* skip rate */
1630                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1631                         continue;
1632
1633                 rates[num_rates++] =
1634                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1635                                           (1 << shift) * 5);
1636         }
1637
1638         supp_rates_len = min_t(int, num_rates, 8);
1639
1640         if (end - pos < 2 + supp_rates_len)
1641                 goto out_err;
1642         *pos++ = WLAN_EID_SUPP_RATES;
1643         *pos++ = supp_rates_len;
1644         memcpy(pos, rates, supp_rates_len);
1645         pos += supp_rates_len;
1646
1647         /* insert "request information" if in custom IEs */
1648         if (ie && ie_len) {
1649                 static const u8 before_extrates[] = {
1650                         WLAN_EID_SSID,
1651                         WLAN_EID_SUPP_RATES,
1652                         WLAN_EID_REQUEST,
1653                 };
1654                 noffset = ieee80211_ie_split(ie, ie_len,
1655                                              before_extrates,
1656                                              ARRAY_SIZE(before_extrates),
1657                                              *offset);
1658                 if (end - pos < noffset - *offset)
1659                         goto out_err;
1660                 memcpy(pos, ie + *offset, noffset - *offset);
1661                 pos += noffset - *offset;
1662                 *offset = noffset;
1663         }
1664
1665         ext_rates_len = num_rates - supp_rates_len;
1666         if (ext_rates_len > 0) {
1667                 if (end - pos < 2 + ext_rates_len)
1668                         goto out_err;
1669                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1670                 *pos++ = ext_rates_len;
1671                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1672                 pos += ext_rates_len;
1673         }
1674
1675         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1676                 if (end - pos < 3)
1677                         goto out_err;
1678                 *pos++ = WLAN_EID_DS_PARAMS;
1679                 *pos++ = 1;
1680                 *pos++ = ieee80211_frequency_to_channel(
1681                                 chandef->chan->center_freq);
1682         }
1683
1684         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1685                 goto done;
1686
1687         /* insert custom IEs that go before HT */
1688         if (ie && ie_len) {
1689                 static const u8 before_ht[] = {
1690                         /*
1691                          * no need to list the ones split off already
1692                          * (or generated here)
1693                          */
1694                         WLAN_EID_DS_PARAMS,
1695                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1696                 };
1697                 noffset = ieee80211_ie_split(ie, ie_len,
1698                                              before_ht, ARRAY_SIZE(before_ht),
1699                                              *offset);
1700                 if (end - pos < noffset - *offset)
1701                         goto out_err;
1702                 memcpy(pos, ie + *offset, noffset - *offset);
1703                 pos += noffset - *offset;
1704                 *offset = noffset;
1705         }
1706
1707         if (sband->ht_cap.ht_supported) {
1708                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1709                         goto out_err;
1710                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1711                                                 sband->ht_cap.cap);
1712         }
1713
1714         /* insert custom IEs that go before VHT */
1715         if (ie && ie_len) {
1716                 static const u8 before_vht[] = {
1717                         /*
1718                          * no need to list the ones split off already
1719                          * (or generated here)
1720                          */
1721                         WLAN_EID_BSS_COEX_2040,
1722                         WLAN_EID_EXT_CAPABILITY,
1723                         WLAN_EID_SSID_LIST,
1724                         WLAN_EID_CHANNEL_USAGE,
1725                         WLAN_EID_INTERWORKING,
1726                         WLAN_EID_MESH_ID,
1727                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1728                 };
1729                 noffset = ieee80211_ie_split(ie, ie_len,
1730                                              before_vht, ARRAY_SIZE(before_vht),
1731                                              *offset);
1732                 if (end - pos < noffset - *offset)
1733                         goto out_err;
1734                 memcpy(pos, ie + *offset, noffset - *offset);
1735                 pos += noffset - *offset;
1736                 *offset = noffset;
1737         }
1738
1739         /* Check if any channel in this sband supports at least 80 MHz */
1740         for (i = 0; i < sband->n_channels; i++) {
1741                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1742                                                 IEEE80211_CHAN_NO_80MHZ))
1743                         continue;
1744
1745                 have_80mhz = true;
1746                 break;
1747         }
1748
1749         if (sband->vht_cap.vht_supported && have_80mhz) {
1750                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1751                         goto out_err;
1752                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1753                                                  sband->vht_cap.cap);
1754         }
1755
1756         /* insert custom IEs that go before HE */
1757         if (ie && ie_len) {
1758                 static const u8 before_he[] = {
1759                         /*
1760                          * no need to list the ones split off before VHT
1761                          * or generated here
1762                          */
1763                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1764                         WLAN_EID_AP_CSN,
1765                         /* TODO: add 11ah/11aj/11ak elements */
1766                 };
1767                 noffset = ieee80211_ie_split(ie, ie_len,
1768                                              before_he, ARRAY_SIZE(before_he),
1769                                              *offset);
1770                 if (end - pos < noffset - *offset)
1771                         goto out_err;
1772                 memcpy(pos, ie + *offset, noffset - *offset);
1773                 pos += noffset - *offset;
1774                 *offset = noffset;
1775         }
1776
1777         he_cap = ieee80211_get_he_sta_cap(sband);
1778         if (he_cap) {
1779                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1780                 if (!pos)
1781                         goto out_err;
1782         }
1783
1784         /*
1785          * If adding more here, adjust code in main.c
1786          * that calculates local->scan_ies_len.
1787          */
1788
1789         return pos - buffer;
1790  out_err:
1791         WARN_ONCE(1, "not enough space for preq IEs\n");
1792  done:
1793         return pos - buffer;
1794 }
1795
1796 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1797                              size_t buffer_len,
1798                              struct ieee80211_scan_ies *ie_desc,
1799                              const u8 *ie, size_t ie_len,
1800                              u8 bands_used, u32 *rate_masks,
1801                              struct cfg80211_chan_def *chandef,
1802                              u32 flags)
1803 {
1804         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1805         int i;
1806
1807         memset(ie_desc, 0, sizeof(*ie_desc));
1808
1809         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1810                 if (bands_used & BIT(i)) {
1811                         pos += ieee80211_build_preq_ies_band(local,
1812                                                              buffer + pos,
1813                                                              buffer_len - pos,
1814                                                              ie, ie_len, i,
1815                                                              rate_masks[i],
1816                                                              chandef,
1817                                                              &custom_ie_offset,
1818                                                              flags);
1819                         ie_desc->ies[i] = buffer + old_pos;
1820                         ie_desc->len[i] = pos - old_pos;
1821                         old_pos = pos;
1822                 }
1823         }
1824
1825         /* add any remaining custom IEs */
1826         if (ie && ie_len) {
1827                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1828                               "not enough space for preq custom IEs\n"))
1829                         return pos;
1830                 memcpy(buffer + pos, ie + custom_ie_offset,
1831                        ie_len - custom_ie_offset);
1832                 ie_desc->common_ies = buffer + pos;
1833                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1834                 pos += ie_len - custom_ie_offset;
1835         }
1836
1837         return pos;
1838 };
1839
1840 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1841                                           const u8 *src, const u8 *dst,
1842                                           u32 ratemask,
1843                                           struct ieee80211_channel *chan,
1844                                           const u8 *ssid, size_t ssid_len,
1845                                           const u8 *ie, size_t ie_len,
1846                                           u32 flags)
1847 {
1848         struct ieee80211_local *local = sdata->local;
1849         struct cfg80211_chan_def chandef;
1850         struct sk_buff *skb;
1851         struct ieee80211_mgmt *mgmt;
1852         int ies_len;
1853         u32 rate_masks[NUM_NL80211_BANDS] = {};
1854         struct ieee80211_scan_ies dummy_ie_desc;
1855
1856         /*
1857          * Do not send DS Channel parameter for directed probe requests
1858          * in order to maximize the chance that we get a response.  Some
1859          * badly-behaved APs don't respond when this parameter is included.
1860          */
1861         chandef.width = sdata->vif.bss_conf.chandef.width;
1862         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1863                 chandef.chan = NULL;
1864         else
1865                 chandef.chan = chan;
1866
1867         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1868                                      100 + ie_len);
1869         if (!skb)
1870                 return NULL;
1871
1872         rate_masks[chan->band] = ratemask;
1873         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1874                                            skb_tailroom(skb), &dummy_ie_desc,
1875                                            ie, ie_len, BIT(chan->band),
1876                                            rate_masks, &chandef, flags);
1877         skb_put(skb, ies_len);
1878
1879         if (dst) {
1880                 mgmt = (struct ieee80211_mgmt *) skb->data;
1881                 memcpy(mgmt->da, dst, ETH_ALEN);
1882                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1883         }
1884
1885         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1886
1887         return skb;
1888 }
1889
1890 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1891                             struct ieee802_11_elems *elems,
1892                             enum nl80211_band band, u32 *basic_rates)
1893 {
1894         struct ieee80211_supported_band *sband;
1895         size_t num_rates;
1896         u32 supp_rates, rate_flags;
1897         int i, j, shift;
1898
1899         sband = sdata->local->hw.wiphy->bands[band];
1900         if (WARN_ON(!sband))
1901                 return 1;
1902
1903         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1904         shift = ieee80211_vif_get_shift(&sdata->vif);
1905
1906         num_rates = sband->n_bitrates;
1907         supp_rates = 0;
1908         for (i = 0; i < elems->supp_rates_len +
1909                      elems->ext_supp_rates_len; i++) {
1910                 u8 rate = 0;
1911                 int own_rate;
1912                 bool is_basic;
1913                 if (i < elems->supp_rates_len)
1914                         rate = elems->supp_rates[i];
1915                 else if (elems->ext_supp_rates)
1916                         rate = elems->ext_supp_rates
1917                                 [i - elems->supp_rates_len];
1918                 own_rate = 5 * (rate & 0x7f);
1919                 is_basic = !!(rate & 0x80);
1920
1921                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1922                         continue;
1923
1924                 for (j = 0; j < num_rates; j++) {
1925                         int brate;
1926                         if ((rate_flags & sband->bitrates[j].flags)
1927                             != rate_flags)
1928                                 continue;
1929
1930                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1931                                              1 << shift);
1932
1933                         if (brate == own_rate) {
1934                                 supp_rates |= BIT(j);
1935                                 if (basic_rates && is_basic)
1936                                         *basic_rates |= BIT(j);
1937                         }
1938                 }
1939         }
1940         return supp_rates;
1941 }
1942
1943 void ieee80211_stop_device(struct ieee80211_local *local)
1944 {
1945         ieee80211_led_radio(local, false);
1946         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1947
1948         cancel_work_sync(&local->reconfig_filter);
1949
1950         flush_workqueue(local->workqueue);
1951         drv_stop(local);
1952 }
1953
1954 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1955                                            bool aborted)
1956 {
1957         /* It's possible that we don't handle the scan completion in
1958          * time during suspend, so if it's still marked as completed
1959          * here, queue the work and flush it to clean things up.
1960          * Instead of calling the worker function directly here, we
1961          * really queue it to avoid potential races with other flows
1962          * scheduling the same work.
1963          */
1964         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1965                 /* If coming from reconfiguration failure, abort the scan so
1966                  * we don't attempt to continue a partial HW scan - which is
1967                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1968                  * completed scan, and a 5 GHz portion is still pending.
1969                  */
1970                 if (aborted)
1971                         set_bit(SCAN_ABORTED, &local->scanning);
1972                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1973                 flush_delayed_work(&local->scan_work);
1974         }
1975 }
1976
1977 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1978 {
1979         struct ieee80211_sub_if_data *sdata;
1980         struct ieee80211_chanctx *ctx;
1981
1982         /*
1983          * We get here if during resume the device can't be restarted properly.
1984          * We might also get here if this happens during HW reset, which is a
1985          * slightly different situation and we need to drop all connections in
1986          * the latter case.
1987          *
1988          * Ask cfg80211 to turn off all interfaces, this will result in more
1989          * warnings but at least we'll then get into a clean stopped state.
1990          */
1991
1992         local->resuming = false;
1993         local->suspended = false;
1994         local->in_reconfig = false;
1995
1996         ieee80211_flush_completed_scan(local, true);
1997
1998         /* scheduled scan clearly can't be running any more, but tell
1999          * cfg80211 and clear local state
2000          */
2001         ieee80211_sched_scan_end(local);
2002
2003         list_for_each_entry(sdata, &local->interfaces, list)
2004                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2005
2006         /* Mark channel contexts as not being in the driver any more to avoid
2007          * removing them from the driver during the shutdown process...
2008          */
2009         mutex_lock(&local->chanctx_mtx);
2010         list_for_each_entry(ctx, &local->chanctx_list, list)
2011                 ctx->driver_present = false;
2012         mutex_unlock(&local->chanctx_mtx);
2013
2014         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2015 }
2016
2017 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2018                                      struct ieee80211_sub_if_data *sdata)
2019 {
2020         struct ieee80211_chanctx_conf *conf;
2021         struct ieee80211_chanctx *ctx;
2022
2023         if (!local->use_chanctx)
2024                 return;
2025
2026         mutex_lock(&local->chanctx_mtx);
2027         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2028                                          lockdep_is_held(&local->chanctx_mtx));
2029         if (conf) {
2030                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2031                 drv_assign_vif_chanctx(local, sdata, ctx);
2032         }
2033         mutex_unlock(&local->chanctx_mtx);
2034 }
2035
2036 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2037 {
2038         struct ieee80211_local *local = sdata->local;
2039         struct sta_info *sta;
2040
2041         /* add STAs back */
2042         mutex_lock(&local->sta_mtx);
2043         list_for_each_entry(sta, &local->sta_list, list) {
2044                 enum ieee80211_sta_state state;
2045
2046                 if (!sta->uploaded || sta->sdata != sdata)
2047                         continue;
2048
2049                 for (state = IEEE80211_STA_NOTEXIST;
2050                      state < sta->sta_state; state++)
2051                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2052                                               state + 1));
2053         }
2054         mutex_unlock(&local->sta_mtx);
2055 }
2056
2057 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2058 {
2059         struct cfg80211_nan_func *func, **funcs;
2060         int res, id, i = 0;
2061
2062         res = drv_start_nan(sdata->local, sdata,
2063                             &sdata->u.nan.conf);
2064         if (WARN_ON(res))
2065                 return res;
2066
2067         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2068                         sizeof(*funcs),
2069                         GFP_KERNEL);
2070         if (!funcs)
2071                 return -ENOMEM;
2072
2073         /* Add all the functions:
2074          * This is a little bit ugly. We need to call a potentially sleeping
2075          * callback for each NAN function, so we can't hold the spinlock.
2076          */
2077         spin_lock_bh(&sdata->u.nan.func_lock);
2078
2079         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2080                 funcs[i++] = func;
2081
2082         spin_unlock_bh(&sdata->u.nan.func_lock);
2083
2084         for (i = 0; funcs[i]; i++) {
2085                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2086                 if (WARN_ON(res))
2087                         ieee80211_nan_func_terminated(&sdata->vif,
2088                                                       funcs[i]->instance_id,
2089                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2090                                                       GFP_KERNEL);
2091         }
2092
2093         kfree(funcs);
2094
2095         return 0;
2096 }
2097
2098 int ieee80211_reconfig(struct ieee80211_local *local)
2099 {
2100         struct ieee80211_hw *hw = &local->hw;
2101         struct ieee80211_sub_if_data *sdata;
2102         struct ieee80211_chanctx *ctx;
2103         struct sta_info *sta;
2104         int res, i;
2105         bool reconfig_due_to_wowlan = false;
2106         struct ieee80211_sub_if_data *sched_scan_sdata;
2107         struct cfg80211_sched_scan_request *sched_scan_req;
2108         bool sched_scan_stopped = false;
2109         bool suspended = local->suspended;
2110
2111         /* nothing to do if HW shouldn't run */
2112         if (!local->open_count)
2113                 goto wake_up;
2114
2115 #ifdef CONFIG_PM
2116         if (suspended)
2117                 local->resuming = true;
2118
2119         if (local->wowlan) {
2120                 /*
2121                  * In the wowlan case, both mac80211 and the device
2122                  * are functional when the resume op is called, so
2123                  * clear local->suspended so the device could operate
2124                  * normally (e.g. pass rx frames).
2125                  */
2126                 local->suspended = false;
2127                 res = drv_resume(local);
2128                 local->wowlan = false;
2129                 if (res < 0) {
2130                         local->resuming = false;
2131                         return res;
2132                 }
2133                 if (res == 0)
2134                         goto wake_up;
2135                 WARN_ON(res > 1);
2136                 /*
2137                  * res is 1, which means the driver requested
2138                  * to go through a regular reset on wakeup.
2139                  * restore local->suspended in this case.
2140                  */
2141                 reconfig_due_to_wowlan = true;
2142                 local->suspended = true;
2143         }
2144 #endif
2145
2146         /*
2147          * In case of hw_restart during suspend (without wowlan),
2148          * cancel restart work, as we are reconfiguring the device
2149          * anyway.
2150          * Note that restart_work is scheduled on a frozen workqueue,
2151          * so we can't deadlock in this case.
2152          */
2153         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2154                 cancel_work_sync(&local->restart_work);
2155
2156         local->started = false;
2157
2158         /*
2159          * Upon resume hardware can sometimes be goofy due to
2160          * various platform / driver / bus issues, so restarting
2161          * the device may at times not work immediately. Propagate
2162          * the error.
2163          */
2164         res = drv_start(local);
2165         if (res) {
2166                 if (suspended)
2167                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2168                 else
2169                         WARN(1, "Hardware became unavailable during restart.\n");
2170                 ieee80211_handle_reconfig_failure(local);
2171                 return res;
2172         }
2173
2174         /* setup fragmentation threshold */
2175         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2176
2177         /* setup RTS threshold */
2178         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2179
2180         /* reset coverage class */
2181         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2182
2183         ieee80211_led_radio(local, true);
2184         ieee80211_mod_tpt_led_trig(local,
2185                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2186
2187         /* add interfaces */
2188         sdata = rtnl_dereference(local->monitor_sdata);
2189         if (sdata) {
2190                 /* in HW restart it exists already */
2191                 WARN_ON(local->resuming);
2192                 res = drv_add_interface(local, sdata);
2193                 if (WARN_ON(res)) {
2194                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2195                         synchronize_net();
2196                         kfree(sdata);
2197                 }
2198         }
2199
2200         list_for_each_entry(sdata, &local->interfaces, list) {
2201                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2202                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2203                     ieee80211_sdata_running(sdata)) {
2204                         res = drv_add_interface(local, sdata);
2205                         if (WARN_ON(res))
2206                                 break;
2207                 }
2208         }
2209
2210         /* If adding any of the interfaces failed above, roll back and
2211          * report failure.
2212          */
2213         if (res) {
2214                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2215                                                      list)
2216                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2217                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2218                             ieee80211_sdata_running(sdata))
2219                                 drv_remove_interface(local, sdata);
2220                 ieee80211_handle_reconfig_failure(local);
2221                 return res;
2222         }
2223
2224         /* add channel contexts */
2225         if (local->use_chanctx) {
2226                 mutex_lock(&local->chanctx_mtx);
2227                 list_for_each_entry(ctx, &local->chanctx_list, list)
2228                         if (ctx->replace_state !=
2229                             IEEE80211_CHANCTX_REPLACES_OTHER)
2230                                 WARN_ON(drv_add_chanctx(local, ctx));
2231                 mutex_unlock(&local->chanctx_mtx);
2232
2233                 sdata = rtnl_dereference(local->monitor_sdata);
2234                 if (sdata && ieee80211_sdata_running(sdata))
2235                         ieee80211_assign_chanctx(local, sdata);
2236         }
2237
2238         /* reconfigure hardware */
2239         ieee80211_hw_config(local, ~0);
2240
2241         ieee80211_configure_filter(local);
2242
2243         /* Finally also reconfigure all the BSS information */
2244         list_for_each_entry(sdata, &local->interfaces, list) {
2245                 u32 changed;
2246
2247                 if (!ieee80211_sdata_running(sdata))
2248                         continue;
2249
2250                 ieee80211_assign_chanctx(local, sdata);
2251
2252                 switch (sdata->vif.type) {
2253                 case NL80211_IFTYPE_AP_VLAN:
2254                 case NL80211_IFTYPE_MONITOR:
2255                         break;
2256                 case NL80211_IFTYPE_ADHOC:
2257                         if (sdata->vif.bss_conf.ibss_joined)
2258                                 WARN_ON(drv_join_ibss(local, sdata));
2259                         /* fall through */
2260                 default:
2261                         ieee80211_reconfig_stations(sdata);
2262                         /* fall through */
2263                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2264                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2265                                 drv_conf_tx(local, sdata, i,
2266                                             &sdata->tx_conf[i]);
2267                         break;
2268                 }
2269
2270                 /* common change flags for all interface types */
2271                 changed = BSS_CHANGED_ERP_CTS_PROT |
2272                           BSS_CHANGED_ERP_PREAMBLE |
2273                           BSS_CHANGED_ERP_SLOT |
2274                           BSS_CHANGED_HT |
2275                           BSS_CHANGED_BASIC_RATES |
2276                           BSS_CHANGED_BEACON_INT |
2277                           BSS_CHANGED_BSSID |
2278                           BSS_CHANGED_CQM |
2279                           BSS_CHANGED_QOS |
2280                           BSS_CHANGED_IDLE |
2281                           BSS_CHANGED_TXPOWER |
2282                           BSS_CHANGED_MCAST_RATE;
2283
2284                 if (sdata->vif.mu_mimo_owner)
2285                         changed |= BSS_CHANGED_MU_GROUPS;
2286
2287                 switch (sdata->vif.type) {
2288                 case NL80211_IFTYPE_STATION:
2289                         changed |= BSS_CHANGED_ASSOC |
2290                                    BSS_CHANGED_ARP_FILTER |
2291                                    BSS_CHANGED_PS;
2292
2293                         /* Re-send beacon info report to the driver */
2294                         if (sdata->u.mgd.have_beacon)
2295                                 changed |= BSS_CHANGED_BEACON_INFO;
2296
2297                         if (sdata->vif.bss_conf.max_idle_period ||
2298                             sdata->vif.bss_conf.protected_keep_alive)
2299                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2300
2301                         sdata_lock(sdata);
2302                         ieee80211_bss_info_change_notify(sdata, changed);
2303                         sdata_unlock(sdata);
2304                         break;
2305                 case NL80211_IFTYPE_OCB:
2306                         changed |= BSS_CHANGED_OCB;
2307                         ieee80211_bss_info_change_notify(sdata, changed);
2308                         break;
2309                 case NL80211_IFTYPE_ADHOC:
2310                         changed |= BSS_CHANGED_IBSS;
2311                         /* fall through */
2312                 case NL80211_IFTYPE_AP:
2313                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2314
2315                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2316                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2317                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2318                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2319
2320                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2321                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2322
2323                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2324                                         drv_start_ap(local, sdata);
2325                         }
2326
2327                         /* fall through */
2328                 case NL80211_IFTYPE_MESH_POINT:
2329                         if (sdata->vif.bss_conf.enable_beacon) {
2330                                 changed |= BSS_CHANGED_BEACON |
2331                                            BSS_CHANGED_BEACON_ENABLED;
2332                                 ieee80211_bss_info_change_notify(sdata, changed);
2333                         }
2334                         break;
2335                 case NL80211_IFTYPE_NAN:
2336                         res = ieee80211_reconfig_nan(sdata);
2337                         if (res < 0) {
2338                                 ieee80211_handle_reconfig_failure(local);
2339                                 return res;
2340                         }
2341                         break;
2342                 case NL80211_IFTYPE_WDS:
2343                 case NL80211_IFTYPE_AP_VLAN:
2344                 case NL80211_IFTYPE_MONITOR:
2345                 case NL80211_IFTYPE_P2P_DEVICE:
2346                         /* nothing to do */
2347                         break;
2348                 case NL80211_IFTYPE_UNSPECIFIED:
2349                 case NUM_NL80211_IFTYPES:
2350                 case NL80211_IFTYPE_P2P_CLIENT:
2351                 case NL80211_IFTYPE_P2P_GO:
2352                         WARN_ON(1);
2353                         break;
2354                 }
2355         }
2356
2357         ieee80211_recalc_ps(local);
2358
2359         /*
2360          * The sta might be in psm against the ap (e.g. because
2361          * this was the state before a hw restart), so we
2362          * explicitly send a null packet in order to make sure
2363          * it'll sync against the ap (and get out of psm).
2364          */
2365         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2366                 list_for_each_entry(sdata, &local->interfaces, list) {
2367                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2368                                 continue;
2369                         if (!sdata->u.mgd.associated)
2370                                 continue;
2371
2372                         ieee80211_send_nullfunc(local, sdata, false);
2373                 }
2374         }
2375
2376         /* APs are now beaconing, add back stations */
2377         mutex_lock(&local->sta_mtx);
2378         list_for_each_entry(sta, &local->sta_list, list) {
2379                 enum ieee80211_sta_state state;
2380
2381                 if (!sta->uploaded)
2382                         continue;
2383
2384                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2385                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2386                         continue;
2387
2388                 for (state = IEEE80211_STA_NOTEXIST;
2389                      state < sta->sta_state; state++)
2390                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2391                                               state + 1));
2392         }
2393         mutex_unlock(&local->sta_mtx);
2394
2395         /* add back keys */
2396         list_for_each_entry(sdata, &local->interfaces, list)
2397                 ieee80211_reset_crypto_tx_tailroom(sdata);
2398
2399         list_for_each_entry(sdata, &local->interfaces, list)
2400                 if (ieee80211_sdata_running(sdata))
2401                         ieee80211_enable_keys(sdata);
2402
2403         /* Reconfigure sched scan if it was interrupted by FW restart */
2404         mutex_lock(&local->mtx);
2405         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2406                                                 lockdep_is_held(&local->mtx));
2407         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2408                                                 lockdep_is_held(&local->mtx));
2409         if (sched_scan_sdata && sched_scan_req)
2410                 /*
2411                  * Sched scan stopped, but we don't want to report it. Instead,
2412                  * we're trying to reschedule. However, if more than one scan
2413                  * plan was set, we cannot reschedule since we don't know which
2414                  * scan plan was currently running (and some scan plans may have
2415                  * already finished).
2416                  */
2417                 if (sched_scan_req->n_scan_plans > 1 ||
2418                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2419                                                          sched_scan_req)) {
2420                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2421                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2422                         sched_scan_stopped = true;
2423                 }
2424         mutex_unlock(&local->mtx);
2425
2426         if (sched_scan_stopped)
2427                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2428
2429  wake_up:
2430
2431         if (local->monitors == local->open_count && local->monitors > 0)
2432                 ieee80211_add_virtual_monitor(local);
2433
2434         /*
2435          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2436          * sessions can be established after a resume.
2437          *
2438          * Also tear down aggregation sessions since reconfiguring
2439          * them in a hardware restart scenario is not easily done
2440          * right now, and the hardware will have lost information
2441          * about the sessions, but we and the AP still think they
2442          * are active. This is really a workaround though.
2443          */
2444         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2445                 mutex_lock(&local->sta_mtx);
2446
2447                 list_for_each_entry(sta, &local->sta_list, list) {
2448                         if (!local->resuming)
2449                                 ieee80211_sta_tear_down_BA_sessions(
2450                                                 sta, AGG_STOP_LOCAL_REQUEST);
2451                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2452                 }
2453
2454                 mutex_unlock(&local->sta_mtx);
2455         }
2456
2457         if (local->in_reconfig) {
2458                 local->in_reconfig = false;
2459                 barrier();
2460
2461                 /* Restart deferred ROCs */
2462                 mutex_lock(&local->mtx);
2463                 ieee80211_start_next_roc(local);
2464                 mutex_unlock(&local->mtx);
2465         }
2466
2467         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2468                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2469                                         false);
2470
2471         /*
2472          * If this is for hw restart things are still running.
2473          * We may want to change that later, however.
2474          */
2475         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2476                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2477
2478         if (!suspended)
2479                 return 0;
2480
2481 #ifdef CONFIG_PM
2482         /* first set suspended false, then resuming */
2483         local->suspended = false;
2484         mb();
2485         local->resuming = false;
2486
2487         ieee80211_flush_completed_scan(local, false);
2488
2489         if (local->open_count && !reconfig_due_to_wowlan)
2490                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2491
2492         list_for_each_entry(sdata, &local->interfaces, list) {
2493                 if (!ieee80211_sdata_running(sdata))
2494                         continue;
2495                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2496                         ieee80211_sta_restart(sdata);
2497         }
2498
2499         mod_timer(&local->sta_cleanup, jiffies + 1);
2500 #else
2501         WARN_ON(1);
2502 #endif
2503
2504         return 0;
2505 }
2506
2507 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2508 {
2509         struct ieee80211_sub_if_data *sdata;
2510         struct ieee80211_local *local;
2511         struct ieee80211_key *key;
2512
2513         if (WARN_ON(!vif))
2514                 return;
2515
2516         sdata = vif_to_sdata(vif);
2517         local = sdata->local;
2518
2519         if (WARN_ON(!local->resuming))
2520                 return;
2521
2522         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2523                 return;
2524
2525         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2526
2527         mutex_lock(&local->key_mtx);
2528         list_for_each_entry(key, &sdata->key_list, list)
2529                 key->flags |= KEY_FLAG_TAINTED;
2530         mutex_unlock(&local->key_mtx);
2531 }
2532 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2533
2534 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2535 {
2536         struct ieee80211_local *local = sdata->local;
2537         struct ieee80211_chanctx_conf *chanctx_conf;
2538         struct ieee80211_chanctx *chanctx;
2539
2540         mutex_lock(&local->chanctx_mtx);
2541
2542         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2543                                         lockdep_is_held(&local->chanctx_mtx));
2544
2545         /*
2546          * This function can be called from a work, thus it may be possible
2547          * that the chanctx_conf is removed (due to a disconnection, for
2548          * example).
2549          * So nothing should be done in such case.
2550          */
2551         if (!chanctx_conf)
2552                 goto unlock;
2553
2554         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2555         ieee80211_recalc_smps_chanctx(local, chanctx);
2556  unlock:
2557         mutex_unlock(&local->chanctx_mtx);
2558 }
2559
2560 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2561 {
2562         struct ieee80211_local *local = sdata->local;
2563         struct ieee80211_chanctx_conf *chanctx_conf;
2564         struct ieee80211_chanctx *chanctx;
2565
2566         mutex_lock(&local->chanctx_mtx);
2567
2568         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2569                                         lockdep_is_held(&local->chanctx_mtx));
2570
2571         if (WARN_ON_ONCE(!chanctx_conf))
2572                 goto unlock;
2573
2574         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2575         ieee80211_recalc_chanctx_min_def(local, chanctx);
2576  unlock:
2577         mutex_unlock(&local->chanctx_mtx);
2578 }
2579
2580 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2581 {
2582         size_t pos = offset;
2583
2584         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2585                 pos += 2 + ies[pos + 1];
2586
2587         return pos;
2588 }
2589
2590 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2591                                             int rssi_min_thold,
2592                                             int rssi_max_thold)
2593 {
2594         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2595
2596         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2597                 return;
2598
2599         /*
2600          * Scale up threshold values before storing it, as the RSSI averaging
2601          * algorithm uses a scaled up value as well. Change this scaling
2602          * factor if the RSSI averaging algorithm changes.
2603          */
2604         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2605         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2606 }
2607
2608 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2609                                     int rssi_min_thold,
2610                                     int rssi_max_thold)
2611 {
2612         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2613
2614         WARN_ON(rssi_min_thold == rssi_max_thold ||
2615                 rssi_min_thold > rssi_max_thold);
2616
2617         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2618                                        rssi_max_thold);
2619 }
2620 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2621
2622 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2623 {
2624         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2625
2626         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2627 }
2628 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2629
2630 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2631                               u16 cap)
2632 {
2633         __le16 tmp;
2634
2635         *pos++ = WLAN_EID_HT_CAPABILITY;
2636         *pos++ = sizeof(struct ieee80211_ht_cap);
2637         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2638
2639         /* capability flags */
2640         tmp = cpu_to_le16(cap);
2641         memcpy(pos, &tmp, sizeof(u16));
2642         pos += sizeof(u16);
2643
2644         /* AMPDU parameters */
2645         *pos++ = ht_cap->ampdu_factor |
2646                  (ht_cap->ampdu_density <<
2647                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2648
2649         /* MCS set */
2650         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2651         pos += sizeof(ht_cap->mcs);
2652
2653         /* extended capabilities */
2654         pos += sizeof(__le16);
2655
2656         /* BF capabilities */
2657         pos += sizeof(__le32);
2658
2659         /* antenna selection */
2660         pos += sizeof(u8);
2661
2662         return pos;
2663 }
2664
2665 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2666                                u32 cap)
2667 {
2668         __le32 tmp;
2669
2670         *pos++ = WLAN_EID_VHT_CAPABILITY;
2671         *pos++ = sizeof(struct ieee80211_vht_cap);
2672         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2673
2674         /* capability flags */
2675         tmp = cpu_to_le32(cap);
2676         memcpy(pos, &tmp, sizeof(u32));
2677         pos += sizeof(u32);
2678
2679         /* VHT MCS set */
2680         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2681         pos += sizeof(vht_cap->vht_mcs);
2682
2683         return pos;
2684 }
2685
2686 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2687                               const struct ieee80211_sta_he_cap *he_cap,
2688                               u8 *end)
2689 {
2690         u8 n;
2691         u8 ie_len;
2692         u8 *orig_pos = pos;
2693
2694         /* Make sure we have place for the IE */
2695         /*
2696          * TODO: the 1 added is because this temporarily is under the EXTENSION
2697          * IE. Get rid of it when it moves.
2698          */
2699         if (!he_cap)
2700                 return orig_pos;
2701
2702         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2703         ie_len = 2 + 1 +
2704                  sizeof(he_cap->he_cap_elem) + n +
2705                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2706                                        he_cap->he_cap_elem.phy_cap_info);
2707
2708         if ((end - pos) < ie_len)
2709                 return orig_pos;
2710
2711         *pos++ = WLAN_EID_EXTENSION;
2712         pos++; /* We'll set the size later below */
2713         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2714
2715         /* Fixed data */
2716         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2717         pos += sizeof(he_cap->he_cap_elem);
2718
2719         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2720         pos += n;
2721
2722         /* Check if PPE Threshold should be present */
2723         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2724              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2725                 goto end;
2726
2727         /*
2728          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2729          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2730          */
2731         n = hweight8(he_cap->ppe_thres[0] &
2732                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2733         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2734                    IEEE80211_PPE_THRES_NSS_POS));
2735
2736         /*
2737          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2738          * total size.
2739          */
2740         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2741         n = DIV_ROUND_UP(n, 8);
2742
2743         /* Copy PPE Thresholds */
2744         memcpy(pos, &he_cap->ppe_thres, n);
2745         pos += n;
2746
2747 end:
2748         orig_pos[1] = (pos - orig_pos) - 2;
2749         return pos;
2750 }
2751
2752 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2753                                const struct cfg80211_chan_def *chandef,
2754                                u16 prot_mode, bool rifs_mode)
2755 {
2756         struct ieee80211_ht_operation *ht_oper;
2757         /* Build HT Information */
2758         *pos++ = WLAN_EID_HT_OPERATION;
2759         *pos++ = sizeof(struct ieee80211_ht_operation);
2760         ht_oper = (struct ieee80211_ht_operation *)pos;
2761         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2762                                         chandef->chan->center_freq);
2763         switch (chandef->width) {
2764         case NL80211_CHAN_WIDTH_160:
2765         case NL80211_CHAN_WIDTH_80P80:
2766         case NL80211_CHAN_WIDTH_80:
2767         case NL80211_CHAN_WIDTH_40:
2768                 if (chandef->center_freq1 > chandef->chan->center_freq)
2769                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2770                 else
2771                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2772                 break;
2773         default:
2774                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2775                 break;
2776         }
2777         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2778             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2779             chandef->width != NL80211_CHAN_WIDTH_20)
2780                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2781
2782         if (rifs_mode)
2783                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2784
2785         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2786         ht_oper->stbc_param = 0x0000;
2787
2788         /* It seems that Basic MCS set and Supported MCS set
2789            are identical for the first 10 bytes */
2790         memset(&ht_oper->basic_set, 0, 16);
2791         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2792
2793         return pos + sizeof(struct ieee80211_ht_operation);
2794 }
2795
2796 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2797                                    const struct cfg80211_chan_def *chandef)
2798 {
2799         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2800         *pos++ = 3;                                     /* IE length */
2801         /* New channel width */
2802         switch (chandef->width) {
2803         case NL80211_CHAN_WIDTH_80:
2804                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2805                 break;
2806         case NL80211_CHAN_WIDTH_160:
2807                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2808                 break;
2809         case NL80211_CHAN_WIDTH_80P80:
2810                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2811                 break;
2812         default:
2813                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2814         }
2815
2816         /* new center frequency segment 0 */
2817         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2818         /* new center frequency segment 1 */
2819         if (chandef->center_freq2)
2820                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2821         else
2822                 *pos++ = 0;
2823 }
2824
2825 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2826                                 const struct cfg80211_chan_def *chandef)
2827 {
2828         struct ieee80211_vht_operation *vht_oper;
2829
2830         *pos++ = WLAN_EID_VHT_OPERATION;
2831         *pos++ = sizeof(struct ieee80211_vht_operation);
2832         vht_oper = (struct ieee80211_vht_operation *)pos;
2833         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2834                                                         chandef->center_freq1);
2835         if (chandef->center_freq2)
2836                 vht_oper->center_freq_seg1_idx =
2837                         ieee80211_frequency_to_channel(chandef->center_freq2);
2838         else
2839                 vht_oper->center_freq_seg1_idx = 0x00;
2840
2841         switch (chandef->width) {
2842         case NL80211_CHAN_WIDTH_160:
2843                 /*
2844                  * Convert 160 MHz channel width to new style as interop
2845                  * workaround.
2846                  */
2847                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2848                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2849                 if (chandef->chan->center_freq < chandef->center_freq1)
2850                         vht_oper->center_freq_seg0_idx -= 8;
2851                 else
2852                         vht_oper->center_freq_seg0_idx += 8;
2853                 break;
2854         case NL80211_CHAN_WIDTH_80P80:
2855                 /*
2856                  * Convert 80+80 MHz channel width to new style as interop
2857                  * workaround.
2858                  */
2859                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2860                 break;
2861         case NL80211_CHAN_WIDTH_80:
2862                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2863                 break;
2864         default:
2865                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2866                 break;
2867         }
2868
2869         /* don't require special VHT peer rates */
2870         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2871
2872         return pos + sizeof(struct ieee80211_vht_operation);
2873 }
2874
2875 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2876                                struct cfg80211_chan_def *chandef)
2877 {
2878         enum nl80211_channel_type channel_type;
2879
2880         if (!ht_oper)
2881                 return false;
2882
2883         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2884         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2885                 channel_type = NL80211_CHAN_HT20;
2886                 break;
2887         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2888                 channel_type = NL80211_CHAN_HT40PLUS;
2889                 break;
2890         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2891                 channel_type = NL80211_CHAN_HT40MINUS;
2892                 break;
2893         default:
2894                 channel_type = NL80211_CHAN_NO_HT;
2895                 return false;
2896         }
2897
2898         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2899         return true;
2900 }
2901
2902 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2903                                 const struct ieee80211_vht_operation *oper,
2904                                 const struct ieee80211_ht_operation *htop,
2905                                 struct cfg80211_chan_def *chandef)
2906 {
2907         struct cfg80211_chan_def new = *chandef;
2908         int cf0, cf1;
2909         int ccfs0, ccfs1, ccfs2;
2910         int ccf0, ccf1;
2911
2912         if (!oper || !htop)
2913                 return false;
2914
2915         ccfs0 = oper->center_freq_seg0_idx;
2916         ccfs1 = oper->center_freq_seg1_idx;
2917         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2918                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2919                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2920
2921         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2922         ccf0 = ccfs0;
2923         ccf1 = ccfs1;
2924         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2925                 ccf1 = ccfs2;
2926
2927         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2928         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2929
2930         switch (oper->chan_width) {
2931         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2932                 /* just use HT information directly */
2933                 break;
2934         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2935                 new.width = NL80211_CHAN_WIDTH_80;
2936                 new.center_freq1 = cf0;
2937                 /* If needed, adjust based on the newer interop workaround. */
2938                 if (ccf1) {
2939                         unsigned int diff;
2940
2941                         diff = abs(ccf1 - ccf0);
2942                         if (diff == 8) {
2943                                 new.width = NL80211_CHAN_WIDTH_160;
2944                                 new.center_freq1 = cf1;
2945                         } else if (diff > 8) {
2946                                 new.width = NL80211_CHAN_WIDTH_80P80;
2947                                 new.center_freq2 = cf1;
2948                         }
2949                 }
2950                 break;
2951         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2952                 /* deprecated encoding */
2953                 new.width = NL80211_CHAN_WIDTH_160;
2954                 new.center_freq1 = cf0;
2955                 break;
2956         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2957                 /* deprecated encoding */
2958                 new.width = NL80211_CHAN_WIDTH_80P80;
2959                 new.center_freq1 = cf0;
2960                 new.center_freq2 = cf1;
2961                 break;
2962         default:
2963                 return false;
2964         }
2965
2966         if (!cfg80211_chandef_valid(&new))
2967                 return false;
2968
2969         *chandef = new;
2970         return true;
2971 }
2972
2973 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2974                              const struct ieee80211_supported_band *sband,
2975                              const u8 *srates, int srates_len, u32 *rates)
2976 {
2977         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2978         int shift = ieee80211_chandef_get_shift(chandef);
2979         struct ieee80211_rate *br;
2980         int brate, rate, i, j, count = 0;
2981
2982         *rates = 0;
2983
2984         for (i = 0; i < srates_len; i++) {
2985                 rate = srates[i] & 0x7f;
2986
2987                 for (j = 0; j < sband->n_bitrates; j++) {
2988                         br = &sband->bitrates[j];
2989                         if ((rate_flags & br->flags) != rate_flags)
2990                                 continue;
2991
2992                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2993                         if (brate == rate) {
2994                                 *rates |= BIT(j);
2995                                 count++;
2996                                 break;
2997                         }
2998                 }
2999         }
3000         return count;
3001 }
3002
3003 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3004                             struct sk_buff *skb, bool need_basic,
3005                             enum nl80211_band band)
3006 {
3007         struct ieee80211_local *local = sdata->local;
3008         struct ieee80211_supported_band *sband;
3009         int rate, shift;
3010         u8 i, rates, *pos;
3011         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3012         u32 rate_flags;
3013
3014         shift = ieee80211_vif_get_shift(&sdata->vif);
3015         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3016         sband = local->hw.wiphy->bands[band];
3017         rates = 0;
3018         for (i = 0; i < sband->n_bitrates; i++) {
3019                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3020                         continue;
3021                 rates++;
3022         }
3023         if (rates > 8)
3024                 rates = 8;
3025
3026         if (skb_tailroom(skb) < rates + 2)
3027                 return -ENOMEM;
3028
3029         pos = skb_put(skb, rates + 2);
3030         *pos++ = WLAN_EID_SUPP_RATES;
3031         *pos++ = rates;
3032         for (i = 0; i < rates; i++) {
3033                 u8 basic = 0;
3034                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3035                         continue;
3036
3037                 if (need_basic && basic_rates & BIT(i))
3038                         basic = 0x80;
3039                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3040                                     5 * (1 << shift));
3041                 *pos++ = basic | (u8) rate;
3042         }
3043
3044         return 0;
3045 }
3046
3047 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3048                                 struct sk_buff *skb, bool need_basic,
3049                                 enum nl80211_band band)
3050 {
3051         struct ieee80211_local *local = sdata->local;
3052         struct ieee80211_supported_band *sband;
3053         int rate, shift;
3054         u8 i, exrates, *pos;
3055         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3056         u32 rate_flags;
3057
3058         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3059         shift = ieee80211_vif_get_shift(&sdata->vif);
3060
3061         sband = local->hw.wiphy->bands[band];
3062         exrates = 0;
3063         for (i = 0; i < sband->n_bitrates; i++) {
3064                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3065                         continue;
3066                 exrates++;
3067         }
3068
3069         if (exrates > 8)
3070                 exrates -= 8;
3071         else
3072                 exrates = 0;
3073
3074         if (skb_tailroom(skb) < exrates + 2)
3075                 return -ENOMEM;
3076
3077         if (exrates) {
3078                 pos = skb_put(skb, exrates + 2);
3079                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3080                 *pos++ = exrates;
3081                 for (i = 8; i < sband->n_bitrates; i++) {
3082                         u8 basic = 0;
3083                         if ((rate_flags & sband->bitrates[i].flags)
3084                             != rate_flags)
3085                                 continue;
3086                         if (need_basic && basic_rates & BIT(i))
3087                                 basic = 0x80;
3088                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3089                                             5 * (1 << shift));
3090                         *pos++ = basic | (u8) rate;
3091                 }
3092         }
3093         return 0;
3094 }
3095
3096 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3097 {
3098         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3099         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3100
3101         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3102                 /* non-managed type inferfaces */
3103                 return 0;
3104         }
3105         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3106 }
3107 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3108
3109 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3110 {
3111         if (!mcs)
3112                 return 1;
3113
3114         /* TODO: consider rx_highest */
3115
3116         if (mcs->rx_mask[3])
3117                 return 4;
3118         if (mcs->rx_mask[2])
3119                 return 3;
3120         if (mcs->rx_mask[1])
3121                 return 2;
3122         return 1;
3123 }
3124
3125 /**
3126  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3127  * @local: mac80211 hw info struct
3128  * @status: RX status
3129  * @mpdu_len: total MPDU length (including FCS)
3130  * @mpdu_offset: offset into MPDU to calculate timestamp at
3131  *
3132  * This function calculates the RX timestamp at the given MPDU offset, taking
3133  * into account what the RX timestamp was. An offset of 0 will just normalize
3134  * the timestamp to TSF at beginning of MPDU reception.
3135  */
3136 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3137                                      struct ieee80211_rx_status *status,
3138                                      unsigned int mpdu_len,
3139                                      unsigned int mpdu_offset)
3140 {
3141         u64 ts = status->mactime;
3142         struct rate_info ri;
3143         u16 rate;
3144
3145         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3146                 return 0;
3147
3148         memset(&ri, 0, sizeof(ri));
3149
3150         ri.bw = status->bw;
3151
3152         /* Fill cfg80211 rate info */
3153         switch (status->encoding) {
3154         case RX_ENC_HT:
3155                 ri.mcs = status->rate_idx;
3156                 ri.flags |= RATE_INFO_FLAGS_MCS;
3157                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3158                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3159                 break;
3160         case RX_ENC_VHT:
3161                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3162                 ri.mcs = status->rate_idx;
3163                 ri.nss = status->nss;
3164                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3165                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3166                 break;
3167         default:
3168                 WARN_ON(1);
3169                 /* fall through */
3170         case RX_ENC_LEGACY: {
3171                 struct ieee80211_supported_band *sband;
3172                 int shift = 0;
3173                 int bitrate;
3174
3175                 switch (status->bw) {
3176                 case RATE_INFO_BW_10:
3177                         shift = 1;
3178                         break;
3179                 case RATE_INFO_BW_5:
3180                         shift = 2;
3181                         break;
3182                 }
3183
3184                 sband = local->hw.wiphy->bands[status->band];
3185                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3186                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3187
3188                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3189                         /* TODO: handle HT/VHT preambles */
3190                         if (status->band == NL80211_BAND_5GHZ) {
3191                                 ts += 20 << shift;
3192                                 mpdu_offset += 2;
3193                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3194                                 ts += 96;
3195                         } else {
3196                                 ts += 192;
3197                         }
3198                 }
3199                 break;
3200                 }
3201         }
3202
3203         rate = cfg80211_calculate_bitrate(&ri);
3204         if (WARN_ONCE(!rate,
3205                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3206                       (unsigned long long)status->flag, status->rate_idx,
3207                       status->nss))
3208                 return 0;
3209
3210         /* rewind from end of MPDU */
3211         if (status->flag & RX_FLAG_MACTIME_END)
3212                 ts -= mpdu_len * 8 * 10 / rate;
3213
3214         ts += mpdu_offset * 8 * 10 / rate;
3215
3216         return ts;
3217 }
3218
3219 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3220 {
3221         struct ieee80211_sub_if_data *sdata;
3222         struct cfg80211_chan_def chandef;
3223
3224         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3225         ASSERT_RTNL();
3226
3227         mutex_lock(&local->mtx);
3228         list_for_each_entry(sdata, &local->interfaces, list) {
3229                 /* it might be waiting for the local->mtx, but then
3230                  * by the time it gets it, sdata->wdev.cac_started
3231                  * will no longer be true
3232                  */
3233                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3234
3235                 if (sdata->wdev.cac_started) {
3236                         chandef = sdata->vif.bss_conf.chandef;
3237                         ieee80211_vif_release_channel(sdata);
3238                         cfg80211_cac_event(sdata->dev,
3239                                            &chandef,
3240                                            NL80211_RADAR_CAC_ABORTED,
3241                                            GFP_KERNEL);
3242                 }
3243         }
3244         mutex_unlock(&local->mtx);
3245 }
3246
3247 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3248 {
3249         struct ieee80211_local *local =
3250                 container_of(work, struct ieee80211_local, radar_detected_work);
3251         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3252         struct ieee80211_chanctx *ctx;
3253         int num_chanctx = 0;
3254
3255         mutex_lock(&local->chanctx_mtx);
3256         list_for_each_entry(ctx, &local->chanctx_list, list) {
3257                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3258                         continue;
3259
3260                 num_chanctx++;
3261                 chandef = ctx->conf.def;
3262         }
3263         mutex_unlock(&local->chanctx_mtx);
3264
3265         rtnl_lock();
3266         ieee80211_dfs_cac_cancel(local);
3267         rtnl_unlock();
3268
3269         if (num_chanctx > 1)
3270                 /* XXX: multi-channel is not supported yet */
3271                 WARN_ON(1);
3272         else
3273                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3274 }
3275
3276 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3277 {
3278         struct ieee80211_local *local = hw_to_local(hw);
3279
3280         trace_api_radar_detected(local);
3281
3282         schedule_work(&local->radar_detected_work);
3283 }
3284 EXPORT_SYMBOL(ieee80211_radar_detected);
3285
3286 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3287 {
3288         u32 ret;
3289         int tmp;
3290
3291         switch (c->width) {
3292         case NL80211_CHAN_WIDTH_20:
3293                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3294                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3295                 break;
3296         case NL80211_CHAN_WIDTH_40:
3297                 c->width = NL80211_CHAN_WIDTH_20;
3298                 c->center_freq1 = c->chan->center_freq;
3299                 ret = IEEE80211_STA_DISABLE_40MHZ |
3300                       IEEE80211_STA_DISABLE_VHT;
3301                 break;
3302         case NL80211_CHAN_WIDTH_80:
3303                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3304                 /* n_P40 */
3305                 tmp /= 2;
3306                 /* freq_P40 */
3307                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3308                 c->width = NL80211_CHAN_WIDTH_40;
3309                 ret = IEEE80211_STA_DISABLE_VHT;
3310                 break;
3311         case NL80211_CHAN_WIDTH_80P80:
3312                 c->center_freq2 = 0;
3313                 c->width = NL80211_CHAN_WIDTH_80;
3314                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3315                       IEEE80211_STA_DISABLE_160MHZ;
3316                 break;
3317         case NL80211_CHAN_WIDTH_160:
3318                 /* n_P20 */
3319                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3320                 /* n_P80 */
3321                 tmp /= 4;
3322                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3323                 c->width = NL80211_CHAN_WIDTH_80;
3324                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3325                       IEEE80211_STA_DISABLE_160MHZ;
3326                 break;
3327         default:
3328         case NL80211_CHAN_WIDTH_20_NOHT:
3329                 WARN_ON_ONCE(1);
3330                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3331                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3332                 break;
3333         case NL80211_CHAN_WIDTH_5:
3334         case NL80211_CHAN_WIDTH_10:
3335                 WARN_ON_ONCE(1);
3336                 /* keep c->width */
3337                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3338                 break;
3339         }
3340
3341         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3342
3343         return ret;
3344 }
3345
3346 /*
3347  * Returns true if smps_mode_new is strictly more restrictive than
3348  * smps_mode_old.
3349  */
3350 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3351                                    enum ieee80211_smps_mode smps_mode_new)
3352 {
3353         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3354                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3355                 return false;
3356
3357         switch (smps_mode_old) {
3358         case IEEE80211_SMPS_STATIC:
3359                 return false;
3360         case IEEE80211_SMPS_DYNAMIC:
3361                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3362         case IEEE80211_SMPS_OFF:
3363                 return smps_mode_new != IEEE80211_SMPS_OFF;
3364         default:
3365                 WARN_ON(1);
3366         }
3367
3368         return false;
3369 }
3370
3371 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3372                               struct cfg80211_csa_settings *csa_settings)
3373 {
3374         struct sk_buff *skb;
3375         struct ieee80211_mgmt *mgmt;
3376         struct ieee80211_local *local = sdata->local;
3377         int freq;
3378         int hdr_len = offsetofend(struct ieee80211_mgmt,
3379                                   u.action.u.chan_switch);
3380         u8 *pos;
3381
3382         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3383             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3384                 return -EOPNOTSUPP;
3385
3386         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3387                             5 + /* channel switch announcement element */
3388                             3 + /* secondary channel offset element */
3389                             5 + /* wide bandwidth channel switch announcement */
3390                             8); /* mesh channel switch parameters element */
3391         if (!skb)
3392                 return -ENOMEM;
3393
3394         skb_reserve(skb, local->tx_headroom);
3395         mgmt = skb_put_zero(skb, hdr_len);
3396         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3397                                           IEEE80211_STYPE_ACTION);
3398
3399         eth_broadcast_addr(mgmt->da);
3400         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3401         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3402                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3403         } else {
3404                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3405                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3406         }
3407         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3408         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3409         pos = skb_put(skb, 5);
3410         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3411         *pos++ = 3;                                             /* IE length */
3412         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3413         freq = csa_settings->chandef.chan->center_freq;
3414         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3415         *pos++ = csa_settings->count;                           /* count */
3416
3417         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3418                 enum nl80211_channel_type ch_type;
3419
3420                 skb_put(skb, 3);
3421                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3422                 *pos++ = 1;                                     /* IE length */
3423                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3424                 if (ch_type == NL80211_CHAN_HT40PLUS)
3425                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3426                 else
3427                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3428         }
3429
3430         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3431                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3432
3433                 skb_put(skb, 8);
3434                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3435                 *pos++ = 6;                                     /* IE length */
3436                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3437                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3438                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3439                 *pos++ |= csa_settings->block_tx ?
3440                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3441                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3442                 pos += 2;
3443                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3444                 pos += 2;
3445         }
3446
3447         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3448             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3449             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3450                 skb_put(skb, 5);
3451                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3452         }
3453
3454         ieee80211_tx_skb(sdata, skb);
3455         return 0;
3456 }
3457
3458 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3459 {
3460         return !(cs == NULL || cs->cipher == 0 ||
3461                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3462                  cs->hdr_len <= cs->key_idx_off ||
3463                  cs->key_idx_shift > 7 ||
3464                  cs->key_idx_mask == 0);
3465 }
3466
3467 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3468 {
3469         int i;
3470
3471         /* Ensure we have enough iftype bitmap space for all iftype values */
3472         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3473
3474         for (i = 0; i < n; i++)
3475                 if (!ieee80211_cs_valid(&cs[i]))
3476                         return false;
3477
3478         return true;
3479 }
3480
3481 const struct ieee80211_cipher_scheme *
3482 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3483                  enum nl80211_iftype iftype)
3484 {
3485         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3486         int n = local->hw.n_cipher_schemes;
3487         int i;
3488         const struct ieee80211_cipher_scheme *cs = NULL;
3489
3490         for (i = 0; i < n; i++) {
3491                 if (l[i].cipher == cipher) {
3492                         cs = &l[i];
3493                         break;
3494                 }
3495         }
3496
3497         if (!cs || !(cs->iftype & BIT(iftype)))
3498                 return NULL;
3499
3500         return cs;
3501 }
3502
3503 int ieee80211_cs_headroom(struct ieee80211_local *local,
3504                           struct cfg80211_crypto_settings *crypto,
3505                           enum nl80211_iftype iftype)
3506 {
3507         const struct ieee80211_cipher_scheme *cs;
3508         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3509         int i;
3510
3511         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3512                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3513                                       iftype);
3514
3515                 if (cs && headroom < cs->hdr_len)
3516                         headroom = cs->hdr_len;
3517         }
3518
3519         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3520         if (cs && headroom < cs->hdr_len)
3521                 headroom = cs->hdr_len;
3522
3523         return headroom;
3524 }
3525
3526 static bool
3527 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3528 {
3529         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3530         int skip;
3531
3532         if (end > 0)
3533                 return false;
3534
3535         /* One shot NOA  */
3536         if (data->count[i] == 1)
3537                 return false;
3538
3539         if (data->desc[i].interval == 0)
3540                 return false;
3541
3542         /* End time is in the past, check for repetitions */
3543         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3544         if (data->count[i] < 255) {
3545                 if (data->count[i] <= skip) {
3546                         data->count[i] = 0;
3547                         return false;
3548                 }
3549
3550                 data->count[i] -= skip;
3551         }
3552
3553         data->desc[i].start += skip * data->desc[i].interval;
3554
3555         return true;
3556 }
3557
3558 static bool
3559 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3560                              s32 *offset)
3561 {
3562         bool ret = false;
3563         int i;
3564
3565         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3566                 s32 cur;
3567
3568                 if (!data->count[i])
3569                         continue;
3570
3571                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3572                         ret = true;
3573
3574                 cur = data->desc[i].start - tsf;
3575                 if (cur > *offset)
3576                         continue;
3577
3578                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3579                 if (cur > *offset)
3580                         *offset = cur;
3581         }
3582
3583         return ret;
3584 }
3585
3586 static u32
3587 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3588 {
3589         s32 offset = 0;
3590         int tries = 0;
3591         /*
3592          * arbitrary limit, used to avoid infinite loops when combined NoA
3593          * descriptors cover the full time period.
3594          */
3595         int max_tries = 5;
3596
3597         ieee80211_extend_absent_time(data, tsf, &offset);
3598         do {
3599                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3600                         break;
3601
3602                 tries++;
3603         } while (tries < max_tries);
3604
3605         return offset;
3606 }
3607
3608 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3609 {
3610         u32 next_offset = BIT(31) - 1;
3611         int i;
3612
3613         data->absent = 0;
3614         data->has_next_tsf = false;
3615         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3616                 s32 start;
3617
3618                 if (!data->count[i])
3619                         continue;
3620
3621                 ieee80211_extend_noa_desc(data, tsf, i);
3622                 start = data->desc[i].start - tsf;
3623                 if (start <= 0)
3624                         data->absent |= BIT(i);
3625
3626                 if (next_offset > start)
3627                         next_offset = start;
3628
3629                 data->has_next_tsf = true;
3630         }
3631
3632         if (data->absent)
3633                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3634
3635         data->next_tsf = tsf + next_offset;
3636 }
3637 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3638
3639 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3640                             struct ieee80211_noa_data *data, u32 tsf)
3641 {
3642         int ret = 0;
3643         int i;
3644
3645         memset(data, 0, sizeof(*data));
3646
3647         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3648                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3649
3650                 if (!desc->count || !desc->duration)
3651                         continue;
3652
3653                 data->count[i] = desc->count;
3654                 data->desc[i].start = le32_to_cpu(desc->start_time);
3655                 data->desc[i].duration = le32_to_cpu(desc->duration);
3656                 data->desc[i].interval = le32_to_cpu(desc->interval);
3657
3658                 if (data->count[i] > 1 &&
3659                     data->desc[i].interval < data->desc[i].duration)
3660                         continue;
3661
3662                 ieee80211_extend_noa_desc(data, tsf, i);
3663                 ret++;
3664         }
3665
3666         if (ret)
3667                 ieee80211_update_p2p_noa(data, tsf);
3668
3669         return ret;
3670 }
3671 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3672
3673 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3674                            struct ieee80211_sub_if_data *sdata)
3675 {
3676         u64 tsf = drv_get_tsf(local, sdata);
3677         u64 dtim_count = 0;
3678         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3679         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3680         struct ps_data *ps;
3681         u8 bcns_from_dtim;
3682
3683         if (tsf == -1ULL || !beacon_int || !dtim_period)
3684                 return;
3685
3686         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3687             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3688                 if (!sdata->bss)
3689                         return;
3690
3691                 ps = &sdata->bss->ps;
3692         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3693                 ps = &sdata->u.mesh.ps;
3694         } else {
3695                 return;
3696         }
3697
3698         /*
3699          * actually finds last dtim_count, mac80211 will update in
3700          * __beacon_add_tim().
3701          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3702          */
3703         do_div(tsf, beacon_int);
3704         bcns_from_dtim = do_div(tsf, dtim_period);
3705         /* just had a DTIM */
3706         if (!bcns_from_dtim)
3707                 dtim_count = 0;
3708         else
3709                 dtim_count = dtim_period - bcns_from_dtim;
3710
3711         ps->dtim_count = dtim_count;
3712 }
3713
3714 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3715                                          struct ieee80211_chanctx *ctx)
3716 {
3717         struct ieee80211_sub_if_data *sdata;
3718         u8 radar_detect = 0;
3719
3720         lockdep_assert_held(&local->chanctx_mtx);
3721
3722         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3723                 return 0;
3724
3725         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3726                 if (sdata->reserved_radar_required)
3727                         radar_detect |= BIT(sdata->reserved_chandef.width);
3728
3729         /*
3730          * An in-place reservation context should not have any assigned vifs
3731          * until it replaces the other context.
3732          */
3733         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3734                 !list_empty(&ctx->assigned_vifs));
3735
3736         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3737                 if (sdata->radar_required)
3738                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3739
3740         return radar_detect;
3741 }
3742
3743 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3744                                  const struct cfg80211_chan_def *chandef,
3745                                  enum ieee80211_chanctx_mode chanmode,
3746                                  u8 radar_detect)
3747 {
3748         struct ieee80211_local *local = sdata->local;
3749         struct ieee80211_sub_if_data *sdata_iter;
3750         enum nl80211_iftype iftype = sdata->wdev.iftype;
3751         struct ieee80211_chanctx *ctx;
3752         int total = 1;
3753         struct iface_combination_params params = {
3754                 .radar_detect = radar_detect,
3755         };
3756
3757         lockdep_assert_held(&local->chanctx_mtx);
3758
3759         if (WARN_ON(hweight32(radar_detect) > 1))
3760                 return -EINVAL;
3761
3762         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3763                     !chandef->chan))
3764                 return -EINVAL;
3765
3766         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3767                 return -EINVAL;
3768
3769         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3770             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3771                 /*
3772                  * always passing this is harmless, since it'll be the
3773                  * same value that cfg80211 finds if it finds the same
3774                  * interface ... and that's always allowed
3775                  */
3776                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3777         }
3778
3779         /* Always allow software iftypes */
3780         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3781                 if (radar_detect)
3782                         return -EINVAL;
3783                 return 0;
3784         }
3785
3786         if (chandef)
3787                 params.num_different_channels = 1;
3788
3789         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3790                 params.iftype_num[iftype] = 1;
3791
3792         list_for_each_entry(ctx, &local->chanctx_list, list) {
3793                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3794                         continue;
3795                 params.radar_detect |=
3796                         ieee80211_chanctx_radar_detect(local, ctx);
3797                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3798                         params.num_different_channels++;
3799                         continue;
3800                 }
3801                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3802                     cfg80211_chandef_compatible(chandef,
3803                                                 &ctx->conf.def))
3804                         continue;
3805                 params.num_different_channels++;
3806         }
3807
3808         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3809                 struct wireless_dev *wdev_iter;
3810
3811                 wdev_iter = &sdata_iter->wdev;
3812
3813                 if (sdata_iter == sdata ||
3814                     !ieee80211_sdata_running(sdata_iter) ||
3815                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3816                         continue;
3817
3818                 params.iftype_num[wdev_iter->iftype]++;
3819                 total++;
3820         }
3821
3822         if (total == 1 && !params.radar_detect)
3823                 return 0;
3824
3825         return cfg80211_check_combinations(local->hw.wiphy, &params);
3826 }
3827
3828 static void
3829 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3830                          void *data)
3831 {
3832         u32 *max_num_different_channels = data;
3833
3834         *max_num_different_channels = max(*max_num_different_channels,
3835                                           c->num_different_channels);
3836 }
3837
3838 int ieee80211_max_num_channels(struct ieee80211_local *local)
3839 {
3840         struct ieee80211_sub_if_data *sdata;
3841         struct ieee80211_chanctx *ctx;
3842         u32 max_num_different_channels = 1;
3843         int err;
3844         struct iface_combination_params params = {0};
3845
3846         lockdep_assert_held(&local->chanctx_mtx);
3847
3848         list_for_each_entry(ctx, &local->chanctx_list, list) {
3849                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3850                         continue;
3851
3852                 params.num_different_channels++;
3853
3854                 params.radar_detect |=
3855                         ieee80211_chanctx_radar_detect(local, ctx);
3856         }
3857
3858         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3859                 params.iftype_num[sdata->wdev.iftype]++;
3860
3861         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3862                                          ieee80211_iter_max_chans,
3863                                          &max_num_different_channels);
3864         if (err < 0)
3865                 return err;
3866
3867         return max_num_different_channels;
3868 }
3869
3870 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3871 {
3872         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3873         *buf++ = 7; /* len */
3874         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3875         *buf++ = 0x50;
3876         *buf++ = 0xf2;
3877         *buf++ = 2; /* WME */
3878         *buf++ = 0; /* WME info */
3879         *buf++ = 1; /* WME ver */
3880         *buf++ = qosinfo; /* U-APSD no in use */
3881
3882         return buf;
3883 }
3884
3885 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3886                              unsigned long *frame_cnt,
3887                              unsigned long *byte_cnt)
3888 {
3889         struct txq_info *txqi = to_txq_info(txq);
3890         u32 frag_cnt = 0, frag_bytes = 0;
3891         struct sk_buff *skb;
3892
3893         skb_queue_walk(&txqi->frags, skb) {
3894                 frag_cnt++;
3895                 frag_bytes += skb->len;
3896         }
3897
3898         if (frame_cnt)
3899                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3900
3901         if (byte_cnt)
3902                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3903 }
3904 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3905
3906 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3907         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3908         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3909         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3910         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3911 };