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 size_t 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                                             u8 *nontransmitted_profile)
1262 {
1263         const struct element *elem, *sub;
1264         size_t profile_len = 0;
1265         bool found = false;
1266
1267         if (!bss_bssid || !transmitter_bssid)
1268                 return profile_len;
1269
1270         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1271                 if (elem->datalen < 2)
1272                         continue;
1273
1274                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1275                         u8 new_bssid[ETH_ALEN];
1276                         const u8 *index;
1277
1278                         if (sub->id != 0 || sub->datalen < 4) {
1279                                 /* not a valid BSS profile */
1280                                 continue;
1281                         }
1282
1283                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1284                             sub->data[1] != 2) {
1285                                 /* The first element of the
1286                                  * Nontransmitted BSSID Profile is not
1287                                  * the Nontransmitted BSSID Capability
1288                                  * element.
1289                                  */
1290                                 continue;
1291                         }
1292
1293                         memset(nontransmitted_profile, 0, len);
1294                         profile_len = cfg80211_merge_profile(start, len,
1295                                                              elem,
1296                                                              sub,
1297                                                              nontransmitted_profile,
1298                                                              len);
1299
1300                         /* found a Nontransmitted BSSID Profile */
1301                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1302                                                  nontransmitted_profile,
1303                                                  profile_len);
1304                         if (!index || index[1] < 1 || index[2] == 0) {
1305                                 /* Invalid MBSSID Index element */
1306                                 continue;
1307                         }
1308
1309                         cfg80211_gen_new_bssid(transmitter_bssid,
1310                                                elem->data[0],
1311                                                index[2],
1312                                                new_bssid);
1313                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1314                                 found = true;
1315                                 elems->bssid_index_len = index[1];
1316                                 elems->bssid_index = (void *)&index[2];
1317                                 break;
1318                         }
1319                 }
1320         }
1321
1322         return found ? profile_len : 0;
1323 }
1324
1325 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1326                                struct ieee802_11_elems *elems,
1327                                u64 filter, u32 crc, u8 *transmitter_bssid,
1328                                u8 *bss_bssid)
1329 {
1330         const struct element *non_inherit = NULL;
1331         u8 *nontransmitted_profile;
1332         int nontransmitted_profile_len = 0;
1333
1334         memset(elems, 0, sizeof(*elems));
1335         elems->ie_start = start;
1336         elems->total_len = len;
1337
1338         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1339         if (nontransmitted_profile) {
1340                 nontransmitted_profile_len =
1341                         ieee802_11_find_bssid_profile(start, len, elems,
1342                                                       transmitter_bssid,
1343                                                       bss_bssid,
1344                                                       nontransmitted_profile);
1345                 non_inherit =
1346                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1347                                                nontransmitted_profile,
1348                                                nontransmitted_profile_len);
1349         }
1350
1351         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1352                                           crc, non_inherit);
1353
1354         /* Override with nontransmitted profile, if found */
1355         if (nontransmitted_profile_len)
1356                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1357                                             nontransmitted_profile_len,
1358                                             action, elems, 0, 0, NULL);
1359
1360         if (elems->tim && !elems->parse_error) {
1361                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1362
1363                 elems->dtim_period = tim_ie->dtim_period;
1364                 elems->dtim_count = tim_ie->dtim_count;
1365         }
1366
1367         /* Override DTIM period and count if needed */
1368         if (elems->bssid_index &&
1369             elems->bssid_index_len >=
1370             offsetofend(struct ieee80211_bssid_index, dtim_period))
1371                 elems->dtim_period = elems->bssid_index->dtim_period;
1372
1373         if (elems->bssid_index &&
1374             elems->bssid_index_len >=
1375             offsetofend(struct ieee80211_bssid_index, dtim_count))
1376                 elems->dtim_count = elems->bssid_index->dtim_count;
1377
1378         kfree(nontransmitted_profile);
1379
1380         return crc;
1381 }
1382
1383 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1384                                            struct ieee80211_tx_queue_params
1385                                            *qparam, int ac)
1386 {
1387         struct ieee80211_chanctx_conf *chanctx_conf;
1388         const struct ieee80211_reg_rule *rrule;
1389         const struct ieee80211_wmm_ac *wmm_ac;
1390         u16 center_freq = 0;
1391
1392         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1393             sdata->vif.type != NL80211_IFTYPE_STATION)
1394                 return;
1395
1396         rcu_read_lock();
1397         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1398         if (chanctx_conf)
1399                 center_freq = chanctx_conf->def.chan->center_freq;
1400
1401         if (!center_freq) {
1402                 rcu_read_unlock();
1403                 return;
1404         }
1405
1406         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1407
1408         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1409                 rcu_read_unlock();
1410                 return;
1411         }
1412
1413         if (sdata->vif.type == NL80211_IFTYPE_AP)
1414                 wmm_ac = &rrule->wmm_rule.ap[ac];
1415         else
1416                 wmm_ac = &rrule->wmm_rule.client[ac];
1417         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1418         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1419         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1420         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1421         rcu_read_unlock();
1422 }
1423
1424 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1425                                bool bss_notify, bool enable_qos)
1426 {
1427         struct ieee80211_local *local = sdata->local;
1428         struct ieee80211_tx_queue_params qparam;
1429         struct ieee80211_chanctx_conf *chanctx_conf;
1430         int ac;
1431         bool use_11b;
1432         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1433         int aCWmin, aCWmax;
1434
1435         if (!local->ops->conf_tx)
1436                 return;
1437
1438         if (local->hw.queues < IEEE80211_NUM_ACS)
1439                 return;
1440
1441         memset(&qparam, 0, sizeof(qparam));
1442
1443         rcu_read_lock();
1444         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1445         use_11b = (chanctx_conf &&
1446                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1447                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1448         rcu_read_unlock();
1449
1450         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1451
1452         /* Set defaults according to 802.11-2007 Table 7-37 */
1453         aCWmax = 1023;
1454         if (use_11b)
1455                 aCWmin = 31;
1456         else
1457                 aCWmin = 15;
1458
1459         /* Confiure old 802.11b/g medium access rules. */
1460         qparam.cw_max = aCWmax;
1461         qparam.cw_min = aCWmin;
1462         qparam.txop = 0;
1463         qparam.aifs = 2;
1464
1465         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1466                 /* Update if QoS is enabled. */
1467                 if (enable_qos) {
1468                         switch (ac) {
1469                         case IEEE80211_AC_BK:
1470                                 qparam.cw_max = aCWmax;
1471                                 qparam.cw_min = aCWmin;
1472                                 qparam.txop = 0;
1473                                 if (is_ocb)
1474                                         qparam.aifs = 9;
1475                                 else
1476                                         qparam.aifs = 7;
1477                                 break;
1478                         /* never happens but let's not leave undefined */
1479                         default:
1480                         case IEEE80211_AC_BE:
1481                                 qparam.cw_max = aCWmax;
1482                                 qparam.cw_min = aCWmin;
1483                                 qparam.txop = 0;
1484                                 if (is_ocb)
1485                                         qparam.aifs = 6;
1486                                 else
1487                                         qparam.aifs = 3;
1488                                 break;
1489                         case IEEE80211_AC_VI:
1490                                 qparam.cw_max = aCWmin;
1491                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1492                                 if (is_ocb)
1493                                         qparam.txop = 0;
1494                                 else if (use_11b)
1495                                         qparam.txop = 6016/32;
1496                                 else
1497                                         qparam.txop = 3008/32;
1498
1499                                 if (is_ocb)
1500                                         qparam.aifs = 3;
1501                                 else
1502                                         qparam.aifs = 2;
1503                                 break;
1504                         case IEEE80211_AC_VO:
1505                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1506                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1507                                 if (is_ocb)
1508                                         qparam.txop = 0;
1509                                 else if (use_11b)
1510                                         qparam.txop = 3264/32;
1511                                 else
1512                                         qparam.txop = 1504/32;
1513                                 qparam.aifs = 2;
1514                                 break;
1515                         }
1516                 }
1517                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1518
1519                 qparam.uapsd = false;
1520
1521                 sdata->tx_conf[ac] = qparam;
1522                 drv_conf_tx(local, sdata, ac, &qparam);
1523         }
1524
1525         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1526             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1527             sdata->vif.type != NL80211_IFTYPE_NAN) {
1528                 sdata->vif.bss_conf.qos = enable_qos;
1529                 if (bss_notify)
1530                         ieee80211_bss_info_change_notify(sdata,
1531                                                          BSS_CHANGED_QOS);
1532         }
1533 }
1534
1535 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1536                          u16 transaction, u16 auth_alg, u16 status,
1537                          const u8 *extra, size_t extra_len, const u8 *da,
1538                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1539                          u32 tx_flags)
1540 {
1541         struct ieee80211_local *local = sdata->local;
1542         struct sk_buff *skb;
1543         struct ieee80211_mgmt *mgmt;
1544         int err;
1545
1546         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1547         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1548                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1549         if (!skb)
1550                 return;
1551
1552         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1553
1554         mgmt = skb_put_zero(skb, 24 + 6);
1555         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1556                                           IEEE80211_STYPE_AUTH);
1557         memcpy(mgmt->da, da, ETH_ALEN);
1558         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1559         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1560         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1561         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1562         mgmt->u.auth.status_code = cpu_to_le16(status);
1563         if (extra)
1564                 skb_put_data(skb, extra, extra_len);
1565
1566         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1567                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1568                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1569                 WARN_ON(err);
1570         }
1571
1572         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1573                                         tx_flags;
1574         ieee80211_tx_skb(sdata, skb);
1575 }
1576
1577 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1578                                     const u8 *bssid, u16 stype, u16 reason,
1579                                     bool send_frame, u8 *frame_buf)
1580 {
1581         struct ieee80211_local *local = sdata->local;
1582         struct sk_buff *skb;
1583         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1584
1585         /* build frame */
1586         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1587         mgmt->duration = 0; /* initialize only */
1588         mgmt->seq_ctrl = 0; /* initialize only */
1589         memcpy(mgmt->da, bssid, ETH_ALEN);
1590         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1591         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1592         /* u.deauth.reason_code == u.disassoc.reason_code */
1593         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1594
1595         if (send_frame) {
1596                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1597                                     IEEE80211_DEAUTH_FRAME_LEN);
1598                 if (!skb)
1599                         return;
1600
1601                 skb_reserve(skb, local->hw.extra_tx_headroom);
1602
1603                 /* copy in frame */
1604                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1605
1606                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1607                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1608                         IEEE80211_SKB_CB(skb)->flags |=
1609                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1610
1611                 ieee80211_tx_skb(sdata, skb);
1612         }
1613 }
1614
1615 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1616                                          u8 *buffer, size_t buffer_len,
1617                                          const u8 *ie, size_t ie_len,
1618                                          enum nl80211_band band,
1619                                          u32 rate_mask,
1620                                          struct cfg80211_chan_def *chandef,
1621                                          size_t *offset, u32 flags)
1622 {
1623         struct ieee80211_supported_band *sband;
1624         const struct ieee80211_sta_he_cap *he_cap;
1625         u8 *pos = buffer, *end = buffer + buffer_len;
1626         size_t noffset;
1627         int supp_rates_len, i;
1628         u8 rates[32];
1629         int num_rates;
1630         int ext_rates_len;
1631         int shift;
1632         u32 rate_flags;
1633         bool have_80mhz = false;
1634
1635         *offset = 0;
1636
1637         sband = local->hw.wiphy->bands[band];
1638         if (WARN_ON_ONCE(!sband))
1639                 return 0;
1640
1641         rate_flags = ieee80211_chandef_rate_flags(chandef);
1642         shift = ieee80211_chandef_get_shift(chandef);
1643
1644         num_rates = 0;
1645         for (i = 0; i < sband->n_bitrates; i++) {
1646                 if ((BIT(i) & rate_mask) == 0)
1647                         continue; /* skip rate */
1648                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1649                         continue;
1650
1651                 rates[num_rates++] =
1652                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1653                                           (1 << shift) * 5);
1654         }
1655
1656         supp_rates_len = min_t(int, num_rates, 8);
1657
1658         if (end - pos < 2 + supp_rates_len)
1659                 goto out_err;
1660         *pos++ = WLAN_EID_SUPP_RATES;
1661         *pos++ = supp_rates_len;
1662         memcpy(pos, rates, supp_rates_len);
1663         pos += supp_rates_len;
1664
1665         /* insert "request information" if in custom IEs */
1666         if (ie && ie_len) {
1667                 static const u8 before_extrates[] = {
1668                         WLAN_EID_SSID,
1669                         WLAN_EID_SUPP_RATES,
1670                         WLAN_EID_REQUEST,
1671                 };
1672                 noffset = ieee80211_ie_split(ie, ie_len,
1673                                              before_extrates,
1674                                              ARRAY_SIZE(before_extrates),
1675                                              *offset);
1676                 if (end - pos < noffset - *offset)
1677                         goto out_err;
1678                 memcpy(pos, ie + *offset, noffset - *offset);
1679                 pos += noffset - *offset;
1680                 *offset = noffset;
1681         }
1682
1683         ext_rates_len = num_rates - supp_rates_len;
1684         if (ext_rates_len > 0) {
1685                 if (end - pos < 2 + ext_rates_len)
1686                         goto out_err;
1687                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1688                 *pos++ = ext_rates_len;
1689                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1690                 pos += ext_rates_len;
1691         }
1692
1693         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1694                 if (end - pos < 3)
1695                         goto out_err;
1696                 *pos++ = WLAN_EID_DS_PARAMS;
1697                 *pos++ = 1;
1698                 *pos++ = ieee80211_frequency_to_channel(
1699                                 chandef->chan->center_freq);
1700         }
1701
1702         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1703                 goto done;
1704
1705         /* insert custom IEs that go before HT */
1706         if (ie && ie_len) {
1707                 static const u8 before_ht[] = {
1708                         /*
1709                          * no need to list the ones split off already
1710                          * (or generated here)
1711                          */
1712                         WLAN_EID_DS_PARAMS,
1713                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1714                 };
1715                 noffset = ieee80211_ie_split(ie, ie_len,
1716                                              before_ht, ARRAY_SIZE(before_ht),
1717                                              *offset);
1718                 if (end - pos < noffset - *offset)
1719                         goto out_err;
1720                 memcpy(pos, ie + *offset, noffset - *offset);
1721                 pos += noffset - *offset;
1722                 *offset = noffset;
1723         }
1724
1725         if (sband->ht_cap.ht_supported) {
1726                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1727                         goto out_err;
1728                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1729                                                 sband->ht_cap.cap);
1730         }
1731
1732         /* insert custom IEs that go before VHT */
1733         if (ie && ie_len) {
1734                 static const u8 before_vht[] = {
1735                         /*
1736                          * no need to list the ones split off already
1737                          * (or generated here)
1738                          */
1739                         WLAN_EID_BSS_COEX_2040,
1740                         WLAN_EID_EXT_CAPABILITY,
1741                         WLAN_EID_SSID_LIST,
1742                         WLAN_EID_CHANNEL_USAGE,
1743                         WLAN_EID_INTERWORKING,
1744                         WLAN_EID_MESH_ID,
1745                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1746                 };
1747                 noffset = ieee80211_ie_split(ie, ie_len,
1748                                              before_vht, ARRAY_SIZE(before_vht),
1749                                              *offset);
1750                 if (end - pos < noffset - *offset)
1751                         goto out_err;
1752                 memcpy(pos, ie + *offset, noffset - *offset);
1753                 pos += noffset - *offset;
1754                 *offset = noffset;
1755         }
1756
1757         /* Check if any channel in this sband supports at least 80 MHz */
1758         for (i = 0; i < sband->n_channels; i++) {
1759                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1760                                                 IEEE80211_CHAN_NO_80MHZ))
1761                         continue;
1762
1763                 have_80mhz = true;
1764                 break;
1765         }
1766
1767         if (sband->vht_cap.vht_supported && have_80mhz) {
1768                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1769                         goto out_err;
1770                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1771                                                  sband->vht_cap.cap);
1772         }
1773
1774         /* insert custom IEs that go before HE */
1775         if (ie && ie_len) {
1776                 static const u8 before_he[] = {
1777                         /*
1778                          * no need to list the ones split off before VHT
1779                          * or generated here
1780                          */
1781                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1782                         WLAN_EID_AP_CSN,
1783                         /* TODO: add 11ah/11aj/11ak elements */
1784                 };
1785                 noffset = ieee80211_ie_split(ie, ie_len,
1786                                              before_he, ARRAY_SIZE(before_he),
1787                                              *offset);
1788                 if (end - pos < noffset - *offset)
1789                         goto out_err;
1790                 memcpy(pos, ie + *offset, noffset - *offset);
1791                 pos += noffset - *offset;
1792                 *offset = noffset;
1793         }
1794
1795         he_cap = ieee80211_get_he_sta_cap(sband);
1796         if (he_cap) {
1797                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1798                 if (!pos)
1799                         goto out_err;
1800         }
1801
1802         /*
1803          * If adding more here, adjust code in main.c
1804          * that calculates local->scan_ies_len.
1805          */
1806
1807         return pos - buffer;
1808  out_err:
1809         WARN_ONCE(1, "not enough space for preq IEs\n");
1810  done:
1811         return pos - buffer;
1812 }
1813
1814 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1815                              size_t buffer_len,
1816                              struct ieee80211_scan_ies *ie_desc,
1817                              const u8 *ie, size_t ie_len,
1818                              u8 bands_used, u32 *rate_masks,
1819                              struct cfg80211_chan_def *chandef,
1820                              u32 flags)
1821 {
1822         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1823         int i;
1824
1825         memset(ie_desc, 0, sizeof(*ie_desc));
1826
1827         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1828                 if (bands_used & BIT(i)) {
1829                         pos += ieee80211_build_preq_ies_band(local,
1830                                                              buffer + pos,
1831                                                              buffer_len - pos,
1832                                                              ie, ie_len, i,
1833                                                              rate_masks[i],
1834                                                              chandef,
1835                                                              &custom_ie_offset,
1836                                                              flags);
1837                         ie_desc->ies[i] = buffer + old_pos;
1838                         ie_desc->len[i] = pos - old_pos;
1839                         old_pos = pos;
1840                 }
1841         }
1842
1843         /* add any remaining custom IEs */
1844         if (ie && ie_len) {
1845                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1846                               "not enough space for preq custom IEs\n"))
1847                         return pos;
1848                 memcpy(buffer + pos, ie + custom_ie_offset,
1849                        ie_len - custom_ie_offset);
1850                 ie_desc->common_ies = buffer + pos;
1851                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1852                 pos += ie_len - custom_ie_offset;
1853         }
1854
1855         return pos;
1856 };
1857
1858 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1859                                           const u8 *src, const u8 *dst,
1860                                           u32 ratemask,
1861                                           struct ieee80211_channel *chan,
1862                                           const u8 *ssid, size_t ssid_len,
1863                                           const u8 *ie, size_t ie_len,
1864                                           u32 flags)
1865 {
1866         struct ieee80211_local *local = sdata->local;
1867         struct cfg80211_chan_def chandef;
1868         struct sk_buff *skb;
1869         struct ieee80211_mgmt *mgmt;
1870         int ies_len;
1871         u32 rate_masks[NUM_NL80211_BANDS] = {};
1872         struct ieee80211_scan_ies dummy_ie_desc;
1873
1874         /*
1875          * Do not send DS Channel parameter for directed probe requests
1876          * in order to maximize the chance that we get a response.  Some
1877          * badly-behaved APs don't respond when this parameter is included.
1878          */
1879         chandef.width = sdata->vif.bss_conf.chandef.width;
1880         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1881                 chandef.chan = NULL;
1882         else
1883                 chandef.chan = chan;
1884
1885         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1886                                      100 + ie_len);
1887         if (!skb)
1888                 return NULL;
1889
1890         rate_masks[chan->band] = ratemask;
1891         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1892                                            skb_tailroom(skb), &dummy_ie_desc,
1893                                            ie, ie_len, BIT(chan->band),
1894                                            rate_masks, &chandef, flags);
1895         skb_put(skb, ies_len);
1896
1897         if (dst) {
1898                 mgmt = (struct ieee80211_mgmt *) skb->data;
1899                 memcpy(mgmt->da, dst, ETH_ALEN);
1900                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1901         }
1902
1903         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1904
1905         return skb;
1906 }
1907
1908 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1909                             struct ieee802_11_elems *elems,
1910                             enum nl80211_band band, u32 *basic_rates)
1911 {
1912         struct ieee80211_supported_band *sband;
1913         size_t num_rates;
1914         u32 supp_rates, rate_flags;
1915         int i, j, shift;
1916
1917         sband = sdata->local->hw.wiphy->bands[band];
1918         if (WARN_ON(!sband))
1919                 return 1;
1920
1921         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1922         shift = ieee80211_vif_get_shift(&sdata->vif);
1923
1924         num_rates = sband->n_bitrates;
1925         supp_rates = 0;
1926         for (i = 0; i < elems->supp_rates_len +
1927                      elems->ext_supp_rates_len; i++) {
1928                 u8 rate = 0;
1929                 int own_rate;
1930                 bool is_basic;
1931                 if (i < elems->supp_rates_len)
1932                         rate = elems->supp_rates[i];
1933                 else if (elems->ext_supp_rates)
1934                         rate = elems->ext_supp_rates
1935                                 [i - elems->supp_rates_len];
1936                 own_rate = 5 * (rate & 0x7f);
1937                 is_basic = !!(rate & 0x80);
1938
1939                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1940                         continue;
1941
1942                 for (j = 0; j < num_rates; j++) {
1943                         int brate;
1944                         if ((rate_flags & sband->bitrates[j].flags)
1945                             != rate_flags)
1946                                 continue;
1947
1948                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1949                                              1 << shift);
1950
1951                         if (brate == own_rate) {
1952                                 supp_rates |= BIT(j);
1953                                 if (basic_rates && is_basic)
1954                                         *basic_rates |= BIT(j);
1955                         }
1956                 }
1957         }
1958         return supp_rates;
1959 }
1960
1961 void ieee80211_stop_device(struct ieee80211_local *local)
1962 {
1963         ieee80211_led_radio(local, false);
1964         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1965
1966         cancel_work_sync(&local->reconfig_filter);
1967
1968         flush_workqueue(local->workqueue);
1969         drv_stop(local);
1970 }
1971
1972 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1973                                            bool aborted)
1974 {
1975         /* It's possible that we don't handle the scan completion in
1976          * time during suspend, so if it's still marked as completed
1977          * here, queue the work and flush it to clean things up.
1978          * Instead of calling the worker function directly here, we
1979          * really queue it to avoid potential races with other flows
1980          * scheduling the same work.
1981          */
1982         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1983                 /* If coming from reconfiguration failure, abort the scan so
1984                  * we don't attempt to continue a partial HW scan - which is
1985                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1986                  * completed scan, and a 5 GHz portion is still pending.
1987                  */
1988                 if (aborted)
1989                         set_bit(SCAN_ABORTED, &local->scanning);
1990                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1991                 flush_delayed_work(&local->scan_work);
1992         }
1993 }
1994
1995 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1996 {
1997         struct ieee80211_sub_if_data *sdata;
1998         struct ieee80211_chanctx *ctx;
1999
2000         /*
2001          * We get here if during resume the device can't be restarted properly.
2002          * We might also get here if this happens during HW reset, which is a
2003          * slightly different situation and we need to drop all connections in
2004          * the latter case.
2005          *
2006          * Ask cfg80211 to turn off all interfaces, this will result in more
2007          * warnings but at least we'll then get into a clean stopped state.
2008          */
2009
2010         local->resuming = false;
2011         local->suspended = false;
2012         local->in_reconfig = false;
2013
2014         ieee80211_flush_completed_scan(local, true);
2015
2016         /* scheduled scan clearly can't be running any more, but tell
2017          * cfg80211 and clear local state
2018          */
2019         ieee80211_sched_scan_end(local);
2020
2021         list_for_each_entry(sdata, &local->interfaces, list)
2022                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2023
2024         /* Mark channel contexts as not being in the driver any more to avoid
2025          * removing them from the driver during the shutdown process...
2026          */
2027         mutex_lock(&local->chanctx_mtx);
2028         list_for_each_entry(ctx, &local->chanctx_list, list)
2029                 ctx->driver_present = false;
2030         mutex_unlock(&local->chanctx_mtx);
2031
2032         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2033 }
2034
2035 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2036                                      struct ieee80211_sub_if_data *sdata)
2037 {
2038         struct ieee80211_chanctx_conf *conf;
2039         struct ieee80211_chanctx *ctx;
2040
2041         if (!local->use_chanctx)
2042                 return;
2043
2044         mutex_lock(&local->chanctx_mtx);
2045         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2046                                          lockdep_is_held(&local->chanctx_mtx));
2047         if (conf) {
2048                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2049                 drv_assign_vif_chanctx(local, sdata, ctx);
2050         }
2051         mutex_unlock(&local->chanctx_mtx);
2052 }
2053
2054 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2055 {
2056         struct ieee80211_local *local = sdata->local;
2057         struct sta_info *sta;
2058
2059         /* add STAs back */
2060         mutex_lock(&local->sta_mtx);
2061         list_for_each_entry(sta, &local->sta_list, list) {
2062                 enum ieee80211_sta_state state;
2063
2064                 if (!sta->uploaded || sta->sdata != sdata)
2065                         continue;
2066
2067                 for (state = IEEE80211_STA_NOTEXIST;
2068                      state < sta->sta_state; state++)
2069                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2070                                               state + 1));
2071         }
2072         mutex_unlock(&local->sta_mtx);
2073 }
2074
2075 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2076 {
2077         struct cfg80211_nan_func *func, **funcs;
2078         int res, id, i = 0;
2079
2080         res = drv_start_nan(sdata->local, sdata,
2081                             &sdata->u.nan.conf);
2082         if (WARN_ON(res))
2083                 return res;
2084
2085         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2086                         sizeof(*funcs),
2087                         GFP_KERNEL);
2088         if (!funcs)
2089                 return -ENOMEM;
2090
2091         /* Add all the functions:
2092          * This is a little bit ugly. We need to call a potentially sleeping
2093          * callback for each NAN function, so we can't hold the spinlock.
2094          */
2095         spin_lock_bh(&sdata->u.nan.func_lock);
2096
2097         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2098                 funcs[i++] = func;
2099
2100         spin_unlock_bh(&sdata->u.nan.func_lock);
2101
2102         for (i = 0; funcs[i]; i++) {
2103                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2104                 if (WARN_ON(res))
2105                         ieee80211_nan_func_terminated(&sdata->vif,
2106                                                       funcs[i]->instance_id,
2107                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2108                                                       GFP_KERNEL);
2109         }
2110
2111         kfree(funcs);
2112
2113         return 0;
2114 }
2115
2116 int ieee80211_reconfig(struct ieee80211_local *local)
2117 {
2118         struct ieee80211_hw *hw = &local->hw;
2119         struct ieee80211_sub_if_data *sdata;
2120         struct ieee80211_chanctx *ctx;
2121         struct sta_info *sta;
2122         int res, i;
2123         bool reconfig_due_to_wowlan = false;
2124         struct ieee80211_sub_if_data *sched_scan_sdata;
2125         struct cfg80211_sched_scan_request *sched_scan_req;
2126         bool sched_scan_stopped = false;
2127         bool suspended = local->suspended;
2128
2129         /* nothing to do if HW shouldn't run */
2130         if (!local->open_count)
2131                 goto wake_up;
2132
2133 #ifdef CONFIG_PM
2134         if (suspended)
2135                 local->resuming = true;
2136
2137         if (local->wowlan) {
2138                 /*
2139                  * In the wowlan case, both mac80211 and the device
2140                  * are functional when the resume op is called, so
2141                  * clear local->suspended so the device could operate
2142                  * normally (e.g. pass rx frames).
2143                  */
2144                 local->suspended = false;
2145                 res = drv_resume(local);
2146                 local->wowlan = false;
2147                 if (res < 0) {
2148                         local->resuming = false;
2149                         return res;
2150                 }
2151                 if (res == 0)
2152                         goto wake_up;
2153                 WARN_ON(res > 1);
2154                 /*
2155                  * res is 1, which means the driver requested
2156                  * to go through a regular reset on wakeup.
2157                  * restore local->suspended in this case.
2158                  */
2159                 reconfig_due_to_wowlan = true;
2160                 local->suspended = true;
2161         }
2162 #endif
2163
2164         /*
2165          * In case of hw_restart during suspend (without wowlan),
2166          * cancel restart work, as we are reconfiguring the device
2167          * anyway.
2168          * Note that restart_work is scheduled on a frozen workqueue,
2169          * so we can't deadlock in this case.
2170          */
2171         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2172                 cancel_work_sync(&local->restart_work);
2173
2174         local->started = false;
2175
2176         /*
2177          * Upon resume hardware can sometimes be goofy due to
2178          * various platform / driver / bus issues, so restarting
2179          * the device may at times not work immediately. Propagate
2180          * the error.
2181          */
2182         res = drv_start(local);
2183         if (res) {
2184                 if (suspended)
2185                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2186                 else
2187                         WARN(1, "Hardware became unavailable during restart.\n");
2188                 ieee80211_handle_reconfig_failure(local);
2189                 return res;
2190         }
2191
2192         /* setup fragmentation threshold */
2193         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2194
2195         /* setup RTS threshold */
2196         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2197
2198         /* reset coverage class */
2199         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2200
2201         ieee80211_led_radio(local, true);
2202         ieee80211_mod_tpt_led_trig(local,
2203                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2204
2205         /* add interfaces */
2206         sdata = rtnl_dereference(local->monitor_sdata);
2207         if (sdata) {
2208                 /* in HW restart it exists already */
2209                 WARN_ON(local->resuming);
2210                 res = drv_add_interface(local, sdata);
2211                 if (WARN_ON(res)) {
2212                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2213                         synchronize_net();
2214                         kfree(sdata);
2215                 }
2216         }
2217
2218         list_for_each_entry(sdata, &local->interfaces, list) {
2219                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2220                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2221                     ieee80211_sdata_running(sdata)) {
2222                         res = drv_add_interface(local, sdata);
2223                         if (WARN_ON(res))
2224                                 break;
2225                 }
2226         }
2227
2228         /* If adding any of the interfaces failed above, roll back and
2229          * report failure.
2230          */
2231         if (res) {
2232                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2233                                                      list)
2234                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2235                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2236                             ieee80211_sdata_running(sdata))
2237                                 drv_remove_interface(local, sdata);
2238                 ieee80211_handle_reconfig_failure(local);
2239                 return res;
2240         }
2241
2242         /* add channel contexts */
2243         if (local->use_chanctx) {
2244                 mutex_lock(&local->chanctx_mtx);
2245                 list_for_each_entry(ctx, &local->chanctx_list, list)
2246                         if (ctx->replace_state !=
2247                             IEEE80211_CHANCTX_REPLACES_OTHER)
2248                                 WARN_ON(drv_add_chanctx(local, ctx));
2249                 mutex_unlock(&local->chanctx_mtx);
2250
2251                 sdata = rtnl_dereference(local->monitor_sdata);
2252                 if (sdata && ieee80211_sdata_running(sdata))
2253                         ieee80211_assign_chanctx(local, sdata);
2254         }
2255
2256         /* reconfigure hardware */
2257         ieee80211_hw_config(local, ~0);
2258
2259         ieee80211_configure_filter(local);
2260
2261         /* Finally also reconfigure all the BSS information */
2262         list_for_each_entry(sdata, &local->interfaces, list) {
2263                 u32 changed;
2264
2265                 if (!ieee80211_sdata_running(sdata))
2266                         continue;
2267
2268                 ieee80211_assign_chanctx(local, sdata);
2269
2270                 switch (sdata->vif.type) {
2271                 case NL80211_IFTYPE_AP_VLAN:
2272                 case NL80211_IFTYPE_MONITOR:
2273                         break;
2274                 case NL80211_IFTYPE_ADHOC:
2275                         if (sdata->vif.bss_conf.ibss_joined)
2276                                 WARN_ON(drv_join_ibss(local, sdata));
2277                         /* fall through */
2278                 default:
2279                         ieee80211_reconfig_stations(sdata);
2280                         /* fall through */
2281                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2282                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2283                                 drv_conf_tx(local, sdata, i,
2284                                             &sdata->tx_conf[i]);
2285                         break;
2286                 }
2287
2288                 /* common change flags for all interface types */
2289                 changed = BSS_CHANGED_ERP_CTS_PROT |
2290                           BSS_CHANGED_ERP_PREAMBLE |
2291                           BSS_CHANGED_ERP_SLOT |
2292                           BSS_CHANGED_HT |
2293                           BSS_CHANGED_BASIC_RATES |
2294                           BSS_CHANGED_BEACON_INT |
2295                           BSS_CHANGED_BSSID |
2296                           BSS_CHANGED_CQM |
2297                           BSS_CHANGED_QOS |
2298                           BSS_CHANGED_IDLE |
2299                           BSS_CHANGED_TXPOWER |
2300                           BSS_CHANGED_MCAST_RATE;
2301
2302                 if (sdata->vif.mu_mimo_owner)
2303                         changed |= BSS_CHANGED_MU_GROUPS;
2304
2305                 switch (sdata->vif.type) {
2306                 case NL80211_IFTYPE_STATION:
2307                         changed |= BSS_CHANGED_ASSOC |
2308                                    BSS_CHANGED_ARP_FILTER |
2309                                    BSS_CHANGED_PS;
2310
2311                         /* Re-send beacon info report to the driver */
2312                         if (sdata->u.mgd.have_beacon)
2313                                 changed |= BSS_CHANGED_BEACON_INFO;
2314
2315                         if (sdata->vif.bss_conf.max_idle_period ||
2316                             sdata->vif.bss_conf.protected_keep_alive)
2317                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2318
2319                         sdata_lock(sdata);
2320                         ieee80211_bss_info_change_notify(sdata, changed);
2321                         sdata_unlock(sdata);
2322                         break;
2323                 case NL80211_IFTYPE_OCB:
2324                         changed |= BSS_CHANGED_OCB;
2325                         ieee80211_bss_info_change_notify(sdata, changed);
2326                         break;
2327                 case NL80211_IFTYPE_ADHOC:
2328                         changed |= BSS_CHANGED_IBSS;
2329                         /* fall through */
2330                 case NL80211_IFTYPE_AP:
2331                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2332
2333                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2334                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2335                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2336                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2337
2338                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2339                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2340
2341                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2342                                         drv_start_ap(local, sdata);
2343                         }
2344
2345                         /* fall through */
2346                 case NL80211_IFTYPE_MESH_POINT:
2347                         if (sdata->vif.bss_conf.enable_beacon) {
2348                                 changed |= BSS_CHANGED_BEACON |
2349                                            BSS_CHANGED_BEACON_ENABLED;
2350                                 ieee80211_bss_info_change_notify(sdata, changed);
2351                         }
2352                         break;
2353                 case NL80211_IFTYPE_NAN:
2354                         res = ieee80211_reconfig_nan(sdata);
2355                         if (res < 0) {
2356                                 ieee80211_handle_reconfig_failure(local);
2357                                 return res;
2358                         }
2359                         break;
2360                 case NL80211_IFTYPE_WDS:
2361                 case NL80211_IFTYPE_AP_VLAN:
2362                 case NL80211_IFTYPE_MONITOR:
2363                 case NL80211_IFTYPE_P2P_DEVICE:
2364                         /* nothing to do */
2365                         break;
2366                 case NL80211_IFTYPE_UNSPECIFIED:
2367                 case NUM_NL80211_IFTYPES:
2368                 case NL80211_IFTYPE_P2P_CLIENT:
2369                 case NL80211_IFTYPE_P2P_GO:
2370                         WARN_ON(1);
2371                         break;
2372                 }
2373         }
2374
2375         ieee80211_recalc_ps(local);
2376
2377         /*
2378          * The sta might be in psm against the ap (e.g. because
2379          * this was the state before a hw restart), so we
2380          * explicitly send a null packet in order to make sure
2381          * it'll sync against the ap (and get out of psm).
2382          */
2383         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2384                 list_for_each_entry(sdata, &local->interfaces, list) {
2385                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2386                                 continue;
2387                         if (!sdata->u.mgd.associated)
2388                                 continue;
2389
2390                         ieee80211_send_nullfunc(local, sdata, false);
2391                 }
2392         }
2393
2394         /* APs are now beaconing, add back stations */
2395         mutex_lock(&local->sta_mtx);
2396         list_for_each_entry(sta, &local->sta_list, list) {
2397                 enum ieee80211_sta_state state;
2398
2399                 if (!sta->uploaded)
2400                         continue;
2401
2402                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2403                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2404                         continue;
2405
2406                 for (state = IEEE80211_STA_NOTEXIST;
2407                      state < sta->sta_state; state++)
2408                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2409                                               state + 1));
2410         }
2411         mutex_unlock(&local->sta_mtx);
2412
2413         /* add back keys */
2414         list_for_each_entry(sdata, &local->interfaces, list)
2415                 ieee80211_reset_crypto_tx_tailroom(sdata);
2416
2417         list_for_each_entry(sdata, &local->interfaces, list)
2418                 if (ieee80211_sdata_running(sdata))
2419                         ieee80211_enable_keys(sdata);
2420
2421         /* Reconfigure sched scan if it was interrupted by FW restart */
2422         mutex_lock(&local->mtx);
2423         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2424                                                 lockdep_is_held(&local->mtx));
2425         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2426                                                 lockdep_is_held(&local->mtx));
2427         if (sched_scan_sdata && sched_scan_req)
2428                 /*
2429                  * Sched scan stopped, but we don't want to report it. Instead,
2430                  * we're trying to reschedule. However, if more than one scan
2431                  * plan was set, we cannot reschedule since we don't know which
2432                  * scan plan was currently running (and some scan plans may have
2433                  * already finished).
2434                  */
2435                 if (sched_scan_req->n_scan_plans > 1 ||
2436                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2437                                                          sched_scan_req)) {
2438                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2439                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2440                         sched_scan_stopped = true;
2441                 }
2442         mutex_unlock(&local->mtx);
2443
2444         if (sched_scan_stopped)
2445                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2446
2447  wake_up:
2448
2449         if (local->monitors == local->open_count && local->monitors > 0)
2450                 ieee80211_add_virtual_monitor(local);
2451
2452         /*
2453          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2454          * sessions can be established after a resume.
2455          *
2456          * Also tear down aggregation sessions since reconfiguring
2457          * them in a hardware restart scenario is not easily done
2458          * right now, and the hardware will have lost information
2459          * about the sessions, but we and the AP still think they
2460          * are active. This is really a workaround though.
2461          */
2462         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2463                 mutex_lock(&local->sta_mtx);
2464
2465                 list_for_each_entry(sta, &local->sta_list, list) {
2466                         if (!local->resuming)
2467                                 ieee80211_sta_tear_down_BA_sessions(
2468                                                 sta, AGG_STOP_LOCAL_REQUEST);
2469                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2470                 }
2471
2472                 mutex_unlock(&local->sta_mtx);
2473         }
2474
2475         if (local->in_reconfig) {
2476                 local->in_reconfig = false;
2477                 barrier();
2478
2479                 /* Restart deferred ROCs */
2480                 mutex_lock(&local->mtx);
2481                 ieee80211_start_next_roc(local);
2482                 mutex_unlock(&local->mtx);
2483         }
2484
2485         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2486                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2487                                         false);
2488
2489         /*
2490          * If this is for hw restart things are still running.
2491          * We may want to change that later, however.
2492          */
2493         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2494                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2495
2496         if (!suspended)
2497                 return 0;
2498
2499 #ifdef CONFIG_PM
2500         /* first set suspended false, then resuming */
2501         local->suspended = false;
2502         mb();
2503         local->resuming = false;
2504
2505         ieee80211_flush_completed_scan(local, false);
2506
2507         if (local->open_count && !reconfig_due_to_wowlan)
2508                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2509
2510         list_for_each_entry(sdata, &local->interfaces, list) {
2511                 if (!ieee80211_sdata_running(sdata))
2512                         continue;
2513                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2514                         ieee80211_sta_restart(sdata);
2515         }
2516
2517         mod_timer(&local->sta_cleanup, jiffies + 1);
2518 #else
2519         WARN_ON(1);
2520 #endif
2521
2522         return 0;
2523 }
2524
2525 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2526 {
2527         struct ieee80211_sub_if_data *sdata;
2528         struct ieee80211_local *local;
2529         struct ieee80211_key *key;
2530
2531         if (WARN_ON(!vif))
2532                 return;
2533
2534         sdata = vif_to_sdata(vif);
2535         local = sdata->local;
2536
2537         if (WARN_ON(!local->resuming))
2538                 return;
2539
2540         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2541                 return;
2542
2543         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2544
2545         mutex_lock(&local->key_mtx);
2546         list_for_each_entry(key, &sdata->key_list, list)
2547                 key->flags |= KEY_FLAG_TAINTED;
2548         mutex_unlock(&local->key_mtx);
2549 }
2550 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2551
2552 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2553 {
2554         struct ieee80211_local *local = sdata->local;
2555         struct ieee80211_chanctx_conf *chanctx_conf;
2556         struct ieee80211_chanctx *chanctx;
2557
2558         mutex_lock(&local->chanctx_mtx);
2559
2560         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2561                                         lockdep_is_held(&local->chanctx_mtx));
2562
2563         /*
2564          * This function can be called from a work, thus it may be possible
2565          * that the chanctx_conf is removed (due to a disconnection, for
2566          * example).
2567          * So nothing should be done in such case.
2568          */
2569         if (!chanctx_conf)
2570                 goto unlock;
2571
2572         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2573         ieee80211_recalc_smps_chanctx(local, chanctx);
2574  unlock:
2575         mutex_unlock(&local->chanctx_mtx);
2576 }
2577
2578 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2579 {
2580         struct ieee80211_local *local = sdata->local;
2581         struct ieee80211_chanctx_conf *chanctx_conf;
2582         struct ieee80211_chanctx *chanctx;
2583
2584         mutex_lock(&local->chanctx_mtx);
2585
2586         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2587                                         lockdep_is_held(&local->chanctx_mtx));
2588
2589         if (WARN_ON_ONCE(!chanctx_conf))
2590                 goto unlock;
2591
2592         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2593         ieee80211_recalc_chanctx_min_def(local, chanctx);
2594  unlock:
2595         mutex_unlock(&local->chanctx_mtx);
2596 }
2597
2598 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2599 {
2600         size_t pos = offset;
2601
2602         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2603                 pos += 2 + ies[pos + 1];
2604
2605         return pos;
2606 }
2607
2608 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2609                                             int rssi_min_thold,
2610                                             int rssi_max_thold)
2611 {
2612         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2613
2614         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2615                 return;
2616
2617         /*
2618          * Scale up threshold values before storing it, as the RSSI averaging
2619          * algorithm uses a scaled up value as well. Change this scaling
2620          * factor if the RSSI averaging algorithm changes.
2621          */
2622         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2623         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2624 }
2625
2626 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2627                                     int rssi_min_thold,
2628                                     int rssi_max_thold)
2629 {
2630         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2631
2632         WARN_ON(rssi_min_thold == rssi_max_thold ||
2633                 rssi_min_thold > rssi_max_thold);
2634
2635         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2636                                        rssi_max_thold);
2637 }
2638 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2639
2640 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2641 {
2642         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2643
2644         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2645 }
2646 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2647
2648 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2649                               u16 cap)
2650 {
2651         __le16 tmp;
2652
2653         *pos++ = WLAN_EID_HT_CAPABILITY;
2654         *pos++ = sizeof(struct ieee80211_ht_cap);
2655         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2656
2657         /* capability flags */
2658         tmp = cpu_to_le16(cap);
2659         memcpy(pos, &tmp, sizeof(u16));
2660         pos += sizeof(u16);
2661
2662         /* AMPDU parameters */
2663         *pos++ = ht_cap->ampdu_factor |
2664                  (ht_cap->ampdu_density <<
2665                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2666
2667         /* MCS set */
2668         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2669         pos += sizeof(ht_cap->mcs);
2670
2671         /* extended capabilities */
2672         pos += sizeof(__le16);
2673
2674         /* BF capabilities */
2675         pos += sizeof(__le32);
2676
2677         /* antenna selection */
2678         pos += sizeof(u8);
2679
2680         return pos;
2681 }
2682
2683 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2684                                u32 cap)
2685 {
2686         __le32 tmp;
2687
2688         *pos++ = WLAN_EID_VHT_CAPABILITY;
2689         *pos++ = sizeof(struct ieee80211_vht_cap);
2690         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2691
2692         /* capability flags */
2693         tmp = cpu_to_le32(cap);
2694         memcpy(pos, &tmp, sizeof(u32));
2695         pos += sizeof(u32);
2696
2697         /* VHT MCS set */
2698         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2699         pos += sizeof(vht_cap->vht_mcs);
2700
2701         return pos;
2702 }
2703
2704 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2705                               const struct ieee80211_sta_he_cap *he_cap,
2706                               u8 *end)
2707 {
2708         u8 n;
2709         u8 ie_len;
2710         u8 *orig_pos = pos;
2711
2712         /* Make sure we have place for the IE */
2713         /*
2714          * TODO: the 1 added is because this temporarily is under the EXTENSION
2715          * IE. Get rid of it when it moves.
2716          */
2717         if (!he_cap)
2718                 return orig_pos;
2719
2720         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2721         ie_len = 2 + 1 +
2722                  sizeof(he_cap->he_cap_elem) + n +
2723                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2724                                        he_cap->he_cap_elem.phy_cap_info);
2725
2726         if ((end - pos) < ie_len)
2727                 return orig_pos;
2728
2729         *pos++ = WLAN_EID_EXTENSION;
2730         pos++; /* We'll set the size later below */
2731         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2732
2733         /* Fixed data */
2734         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2735         pos += sizeof(he_cap->he_cap_elem);
2736
2737         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2738         pos += n;
2739
2740         /* Check if PPE Threshold should be present */
2741         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2742              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2743                 goto end;
2744
2745         /*
2746          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2747          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2748          */
2749         n = hweight8(he_cap->ppe_thres[0] &
2750                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2751         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2752                    IEEE80211_PPE_THRES_NSS_POS));
2753
2754         /*
2755          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2756          * total size.
2757          */
2758         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2759         n = DIV_ROUND_UP(n, 8);
2760
2761         /* Copy PPE Thresholds */
2762         memcpy(pos, &he_cap->ppe_thres, n);
2763         pos += n;
2764
2765 end:
2766         orig_pos[1] = (pos - orig_pos) - 2;
2767         return pos;
2768 }
2769
2770 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2771                                const struct cfg80211_chan_def *chandef,
2772                                u16 prot_mode, bool rifs_mode)
2773 {
2774         struct ieee80211_ht_operation *ht_oper;
2775         /* Build HT Information */
2776         *pos++ = WLAN_EID_HT_OPERATION;
2777         *pos++ = sizeof(struct ieee80211_ht_operation);
2778         ht_oper = (struct ieee80211_ht_operation *)pos;
2779         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2780                                         chandef->chan->center_freq);
2781         switch (chandef->width) {
2782         case NL80211_CHAN_WIDTH_160:
2783         case NL80211_CHAN_WIDTH_80P80:
2784         case NL80211_CHAN_WIDTH_80:
2785         case NL80211_CHAN_WIDTH_40:
2786                 if (chandef->center_freq1 > chandef->chan->center_freq)
2787                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2788                 else
2789                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2790                 break;
2791         default:
2792                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2793                 break;
2794         }
2795         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2796             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2797             chandef->width != NL80211_CHAN_WIDTH_20)
2798                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2799
2800         if (rifs_mode)
2801                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2802
2803         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2804         ht_oper->stbc_param = 0x0000;
2805
2806         /* It seems that Basic MCS set and Supported MCS set
2807            are identical for the first 10 bytes */
2808         memset(&ht_oper->basic_set, 0, 16);
2809         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2810
2811         return pos + sizeof(struct ieee80211_ht_operation);
2812 }
2813
2814 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2815                                    const struct cfg80211_chan_def *chandef)
2816 {
2817         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2818         *pos++ = 3;                                     /* IE length */
2819         /* New channel width */
2820         switch (chandef->width) {
2821         case NL80211_CHAN_WIDTH_80:
2822                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2823                 break;
2824         case NL80211_CHAN_WIDTH_160:
2825                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2826                 break;
2827         case NL80211_CHAN_WIDTH_80P80:
2828                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2829                 break;
2830         default:
2831                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2832         }
2833
2834         /* new center frequency segment 0 */
2835         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2836         /* new center frequency segment 1 */
2837         if (chandef->center_freq2)
2838                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2839         else
2840                 *pos++ = 0;
2841 }
2842
2843 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2844                                 const struct cfg80211_chan_def *chandef)
2845 {
2846         struct ieee80211_vht_operation *vht_oper;
2847
2848         *pos++ = WLAN_EID_VHT_OPERATION;
2849         *pos++ = sizeof(struct ieee80211_vht_operation);
2850         vht_oper = (struct ieee80211_vht_operation *)pos;
2851         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2852                                                         chandef->center_freq1);
2853         if (chandef->center_freq2)
2854                 vht_oper->center_freq_seg1_idx =
2855                         ieee80211_frequency_to_channel(chandef->center_freq2);
2856         else
2857                 vht_oper->center_freq_seg1_idx = 0x00;
2858
2859         switch (chandef->width) {
2860         case NL80211_CHAN_WIDTH_160:
2861                 /*
2862                  * Convert 160 MHz channel width to new style as interop
2863                  * workaround.
2864                  */
2865                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2866                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2867                 if (chandef->chan->center_freq < chandef->center_freq1)
2868                         vht_oper->center_freq_seg0_idx -= 8;
2869                 else
2870                         vht_oper->center_freq_seg0_idx += 8;
2871                 break;
2872         case NL80211_CHAN_WIDTH_80P80:
2873                 /*
2874                  * Convert 80+80 MHz channel width to new style as interop
2875                  * workaround.
2876                  */
2877                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2878                 break;
2879         case NL80211_CHAN_WIDTH_80:
2880                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2881                 break;
2882         default:
2883                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2884                 break;
2885         }
2886
2887         /* don't require special VHT peer rates */
2888         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2889
2890         return pos + sizeof(struct ieee80211_vht_operation);
2891 }
2892
2893 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2894                                struct cfg80211_chan_def *chandef)
2895 {
2896         enum nl80211_channel_type channel_type;
2897
2898         if (!ht_oper)
2899                 return false;
2900
2901         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2902         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2903                 channel_type = NL80211_CHAN_HT20;
2904                 break;
2905         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2906                 channel_type = NL80211_CHAN_HT40PLUS;
2907                 break;
2908         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2909                 channel_type = NL80211_CHAN_HT40MINUS;
2910                 break;
2911         default:
2912                 channel_type = NL80211_CHAN_NO_HT;
2913                 return false;
2914         }
2915
2916         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2917         return true;
2918 }
2919
2920 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2921                                 const struct ieee80211_vht_operation *oper,
2922                                 const struct ieee80211_ht_operation *htop,
2923                                 struct cfg80211_chan_def *chandef)
2924 {
2925         struct cfg80211_chan_def new = *chandef;
2926         int cf0, cf1;
2927         int ccfs0, ccfs1, ccfs2;
2928         int ccf0, ccf1;
2929
2930         if (!oper || !htop)
2931                 return false;
2932
2933         ccfs0 = oper->center_freq_seg0_idx;
2934         ccfs1 = oper->center_freq_seg1_idx;
2935         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2936                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2937                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2938
2939         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2940         ccf0 = ccfs0;
2941         ccf1 = ccfs1;
2942         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2943                 ccf1 = ccfs2;
2944
2945         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2946         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2947
2948         switch (oper->chan_width) {
2949         case IEEE80211_VHT_CHANWIDTH_USE_HT:
2950                 /* just use HT information directly */
2951                 break;
2952         case IEEE80211_VHT_CHANWIDTH_80MHZ:
2953                 new.width = NL80211_CHAN_WIDTH_80;
2954                 new.center_freq1 = cf0;
2955                 /* If needed, adjust based on the newer interop workaround. */
2956                 if (ccf1) {
2957                         unsigned int diff;
2958
2959                         diff = abs(ccf1 - ccf0);
2960                         if (diff == 8) {
2961                                 new.width = NL80211_CHAN_WIDTH_160;
2962                                 new.center_freq1 = cf1;
2963                         } else if (diff > 8) {
2964                                 new.width = NL80211_CHAN_WIDTH_80P80;
2965                                 new.center_freq2 = cf1;
2966                         }
2967                 }
2968                 break;
2969         case IEEE80211_VHT_CHANWIDTH_160MHZ:
2970                 /* deprecated encoding */
2971                 new.width = NL80211_CHAN_WIDTH_160;
2972                 new.center_freq1 = cf0;
2973                 break;
2974         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2975                 /* deprecated encoding */
2976                 new.width = NL80211_CHAN_WIDTH_80P80;
2977                 new.center_freq1 = cf0;
2978                 new.center_freq2 = cf1;
2979                 break;
2980         default:
2981                 return false;
2982         }
2983
2984         if (!cfg80211_chandef_valid(&new))
2985                 return false;
2986
2987         *chandef = new;
2988         return true;
2989 }
2990
2991 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2992                              const struct ieee80211_supported_band *sband,
2993                              const u8 *srates, int srates_len, u32 *rates)
2994 {
2995         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2996         int shift = ieee80211_chandef_get_shift(chandef);
2997         struct ieee80211_rate *br;
2998         int brate, rate, i, j, count = 0;
2999
3000         *rates = 0;
3001
3002         for (i = 0; i < srates_len; i++) {
3003                 rate = srates[i] & 0x7f;
3004
3005                 for (j = 0; j < sband->n_bitrates; j++) {
3006                         br = &sband->bitrates[j];
3007                         if ((rate_flags & br->flags) != rate_flags)
3008                                 continue;
3009
3010                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3011                         if (brate == rate) {
3012                                 *rates |= BIT(j);
3013                                 count++;
3014                                 break;
3015                         }
3016                 }
3017         }
3018         return count;
3019 }
3020
3021 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3022                             struct sk_buff *skb, bool need_basic,
3023                             enum nl80211_band band)
3024 {
3025         struct ieee80211_local *local = sdata->local;
3026         struct ieee80211_supported_band *sband;
3027         int rate, shift;
3028         u8 i, rates, *pos;
3029         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3030         u32 rate_flags;
3031
3032         shift = ieee80211_vif_get_shift(&sdata->vif);
3033         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3034         sband = local->hw.wiphy->bands[band];
3035         rates = 0;
3036         for (i = 0; i < sband->n_bitrates; i++) {
3037                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3038                         continue;
3039                 rates++;
3040         }
3041         if (rates > 8)
3042                 rates = 8;
3043
3044         if (skb_tailroom(skb) < rates + 2)
3045                 return -ENOMEM;
3046
3047         pos = skb_put(skb, rates + 2);
3048         *pos++ = WLAN_EID_SUPP_RATES;
3049         *pos++ = rates;
3050         for (i = 0; i < rates; i++) {
3051                 u8 basic = 0;
3052                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3053                         continue;
3054
3055                 if (need_basic && basic_rates & BIT(i))
3056                         basic = 0x80;
3057                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3058                                     5 * (1 << shift));
3059                 *pos++ = basic | (u8) rate;
3060         }
3061
3062         return 0;
3063 }
3064
3065 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3066                                 struct sk_buff *skb, bool need_basic,
3067                                 enum nl80211_band band)
3068 {
3069         struct ieee80211_local *local = sdata->local;
3070         struct ieee80211_supported_band *sband;
3071         int rate, shift;
3072         u8 i, exrates, *pos;
3073         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3074         u32 rate_flags;
3075
3076         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3077         shift = ieee80211_vif_get_shift(&sdata->vif);
3078
3079         sband = local->hw.wiphy->bands[band];
3080         exrates = 0;
3081         for (i = 0; i < sband->n_bitrates; i++) {
3082                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3083                         continue;
3084                 exrates++;
3085         }
3086
3087         if (exrates > 8)
3088                 exrates -= 8;
3089         else
3090                 exrates = 0;
3091
3092         if (skb_tailroom(skb) < exrates + 2)
3093                 return -ENOMEM;
3094
3095         if (exrates) {
3096                 pos = skb_put(skb, exrates + 2);
3097                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3098                 *pos++ = exrates;
3099                 for (i = 8; i < sband->n_bitrates; i++) {
3100                         u8 basic = 0;
3101                         if ((rate_flags & sband->bitrates[i].flags)
3102                             != rate_flags)
3103                                 continue;
3104                         if (need_basic && basic_rates & BIT(i))
3105                                 basic = 0x80;
3106                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3107                                             5 * (1 << shift));
3108                         *pos++ = basic | (u8) rate;
3109                 }
3110         }
3111         return 0;
3112 }
3113
3114 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3115 {
3116         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3117         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3118
3119         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3120                 /* non-managed type inferfaces */
3121                 return 0;
3122         }
3123         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3124 }
3125 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3126
3127 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3128 {
3129         if (!mcs)
3130                 return 1;
3131
3132         /* TODO: consider rx_highest */
3133
3134         if (mcs->rx_mask[3])
3135                 return 4;
3136         if (mcs->rx_mask[2])
3137                 return 3;
3138         if (mcs->rx_mask[1])
3139                 return 2;
3140         return 1;
3141 }
3142
3143 /**
3144  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3145  * @local: mac80211 hw info struct
3146  * @status: RX status
3147  * @mpdu_len: total MPDU length (including FCS)
3148  * @mpdu_offset: offset into MPDU to calculate timestamp at
3149  *
3150  * This function calculates the RX timestamp at the given MPDU offset, taking
3151  * into account what the RX timestamp was. An offset of 0 will just normalize
3152  * the timestamp to TSF at beginning of MPDU reception.
3153  */
3154 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3155                                      struct ieee80211_rx_status *status,
3156                                      unsigned int mpdu_len,
3157                                      unsigned int mpdu_offset)
3158 {
3159         u64 ts = status->mactime;
3160         struct rate_info ri;
3161         u16 rate;
3162
3163         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3164                 return 0;
3165
3166         memset(&ri, 0, sizeof(ri));
3167
3168         ri.bw = status->bw;
3169
3170         /* Fill cfg80211 rate info */
3171         switch (status->encoding) {
3172         case RX_ENC_HT:
3173                 ri.mcs = status->rate_idx;
3174                 ri.flags |= RATE_INFO_FLAGS_MCS;
3175                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3176                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3177                 break;
3178         case RX_ENC_VHT:
3179                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3180                 ri.mcs = status->rate_idx;
3181                 ri.nss = status->nss;
3182                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3183                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3184                 break;
3185         default:
3186                 WARN_ON(1);
3187                 /* fall through */
3188         case RX_ENC_LEGACY: {
3189                 struct ieee80211_supported_band *sband;
3190                 int shift = 0;
3191                 int bitrate;
3192
3193                 switch (status->bw) {
3194                 case RATE_INFO_BW_10:
3195                         shift = 1;
3196                         break;
3197                 case RATE_INFO_BW_5:
3198                         shift = 2;
3199                         break;
3200                 }
3201
3202                 sband = local->hw.wiphy->bands[status->band];
3203                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3204                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3205
3206                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3207                         /* TODO: handle HT/VHT preambles */
3208                         if (status->band == NL80211_BAND_5GHZ) {
3209                                 ts += 20 << shift;
3210                                 mpdu_offset += 2;
3211                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3212                                 ts += 96;
3213                         } else {
3214                                 ts += 192;
3215                         }
3216                 }
3217                 break;
3218                 }
3219         }
3220
3221         rate = cfg80211_calculate_bitrate(&ri);
3222         if (WARN_ONCE(!rate,
3223                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3224                       (unsigned long long)status->flag, status->rate_idx,
3225                       status->nss))
3226                 return 0;
3227
3228         /* rewind from end of MPDU */
3229         if (status->flag & RX_FLAG_MACTIME_END)
3230                 ts -= mpdu_len * 8 * 10 / rate;
3231
3232         ts += mpdu_offset * 8 * 10 / rate;
3233
3234         return ts;
3235 }
3236
3237 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3238 {
3239         struct ieee80211_sub_if_data *sdata;
3240         struct cfg80211_chan_def chandef;
3241
3242         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3243         ASSERT_RTNL();
3244
3245         mutex_lock(&local->mtx);
3246         list_for_each_entry(sdata, &local->interfaces, list) {
3247                 /* it might be waiting for the local->mtx, but then
3248                  * by the time it gets it, sdata->wdev.cac_started
3249                  * will no longer be true
3250                  */
3251                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3252
3253                 if (sdata->wdev.cac_started) {
3254                         chandef = sdata->vif.bss_conf.chandef;
3255                         ieee80211_vif_release_channel(sdata);
3256                         cfg80211_cac_event(sdata->dev,
3257                                            &chandef,
3258                                            NL80211_RADAR_CAC_ABORTED,
3259                                            GFP_KERNEL);
3260                 }
3261         }
3262         mutex_unlock(&local->mtx);
3263 }
3264
3265 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3266 {
3267         struct ieee80211_local *local =
3268                 container_of(work, struct ieee80211_local, radar_detected_work);
3269         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3270         struct ieee80211_chanctx *ctx;
3271         int num_chanctx = 0;
3272
3273         mutex_lock(&local->chanctx_mtx);
3274         list_for_each_entry(ctx, &local->chanctx_list, list) {
3275                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3276                         continue;
3277
3278                 num_chanctx++;
3279                 chandef = ctx->conf.def;
3280         }
3281         mutex_unlock(&local->chanctx_mtx);
3282
3283         rtnl_lock();
3284         ieee80211_dfs_cac_cancel(local);
3285         rtnl_unlock();
3286
3287         if (num_chanctx > 1)
3288                 /* XXX: multi-channel is not supported yet */
3289                 WARN_ON(1);
3290         else
3291                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3292 }
3293
3294 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3295 {
3296         struct ieee80211_local *local = hw_to_local(hw);
3297
3298         trace_api_radar_detected(local);
3299
3300         schedule_work(&local->radar_detected_work);
3301 }
3302 EXPORT_SYMBOL(ieee80211_radar_detected);
3303
3304 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3305 {
3306         u32 ret;
3307         int tmp;
3308
3309         switch (c->width) {
3310         case NL80211_CHAN_WIDTH_20:
3311                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3312                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3313                 break;
3314         case NL80211_CHAN_WIDTH_40:
3315                 c->width = NL80211_CHAN_WIDTH_20;
3316                 c->center_freq1 = c->chan->center_freq;
3317                 ret = IEEE80211_STA_DISABLE_40MHZ |
3318                       IEEE80211_STA_DISABLE_VHT;
3319                 break;
3320         case NL80211_CHAN_WIDTH_80:
3321                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3322                 /* n_P40 */
3323                 tmp /= 2;
3324                 /* freq_P40 */
3325                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3326                 c->width = NL80211_CHAN_WIDTH_40;
3327                 ret = IEEE80211_STA_DISABLE_VHT;
3328                 break;
3329         case NL80211_CHAN_WIDTH_80P80:
3330                 c->center_freq2 = 0;
3331                 c->width = NL80211_CHAN_WIDTH_80;
3332                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3333                       IEEE80211_STA_DISABLE_160MHZ;
3334                 break;
3335         case NL80211_CHAN_WIDTH_160:
3336                 /* n_P20 */
3337                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3338                 /* n_P80 */
3339                 tmp /= 4;
3340                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3341                 c->width = NL80211_CHAN_WIDTH_80;
3342                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3343                       IEEE80211_STA_DISABLE_160MHZ;
3344                 break;
3345         default:
3346         case NL80211_CHAN_WIDTH_20_NOHT:
3347                 WARN_ON_ONCE(1);
3348                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3349                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3350                 break;
3351         case NL80211_CHAN_WIDTH_5:
3352         case NL80211_CHAN_WIDTH_10:
3353                 WARN_ON_ONCE(1);
3354                 /* keep c->width */
3355                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3356                 break;
3357         }
3358
3359         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3360
3361         return ret;
3362 }
3363
3364 /*
3365  * Returns true if smps_mode_new is strictly more restrictive than
3366  * smps_mode_old.
3367  */
3368 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3369                                    enum ieee80211_smps_mode smps_mode_new)
3370 {
3371         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3372                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3373                 return false;
3374
3375         switch (smps_mode_old) {
3376         case IEEE80211_SMPS_STATIC:
3377                 return false;
3378         case IEEE80211_SMPS_DYNAMIC:
3379                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3380         case IEEE80211_SMPS_OFF:
3381                 return smps_mode_new != IEEE80211_SMPS_OFF;
3382         default:
3383                 WARN_ON(1);
3384         }
3385
3386         return false;
3387 }
3388
3389 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3390                               struct cfg80211_csa_settings *csa_settings)
3391 {
3392         struct sk_buff *skb;
3393         struct ieee80211_mgmt *mgmt;
3394         struct ieee80211_local *local = sdata->local;
3395         int freq;
3396         int hdr_len = offsetofend(struct ieee80211_mgmt,
3397                                   u.action.u.chan_switch);
3398         u8 *pos;
3399
3400         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3401             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3402                 return -EOPNOTSUPP;
3403
3404         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3405                             5 + /* channel switch announcement element */
3406                             3 + /* secondary channel offset element */
3407                             5 + /* wide bandwidth channel switch announcement */
3408                             8); /* mesh channel switch parameters element */
3409         if (!skb)
3410                 return -ENOMEM;
3411
3412         skb_reserve(skb, local->tx_headroom);
3413         mgmt = skb_put_zero(skb, hdr_len);
3414         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3415                                           IEEE80211_STYPE_ACTION);
3416
3417         eth_broadcast_addr(mgmt->da);
3418         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3419         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3420                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3421         } else {
3422                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3423                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3424         }
3425         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3426         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3427         pos = skb_put(skb, 5);
3428         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3429         *pos++ = 3;                                             /* IE length */
3430         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3431         freq = csa_settings->chandef.chan->center_freq;
3432         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3433         *pos++ = csa_settings->count;                           /* count */
3434
3435         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3436                 enum nl80211_channel_type ch_type;
3437
3438                 skb_put(skb, 3);
3439                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3440                 *pos++ = 1;                                     /* IE length */
3441                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3442                 if (ch_type == NL80211_CHAN_HT40PLUS)
3443                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3444                 else
3445                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3446         }
3447
3448         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3449                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3450
3451                 skb_put(skb, 8);
3452                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3453                 *pos++ = 6;                                     /* IE length */
3454                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3455                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3456                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3457                 *pos++ |= csa_settings->block_tx ?
3458                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3459                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3460                 pos += 2;
3461                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3462                 pos += 2;
3463         }
3464
3465         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3466             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3467             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3468                 skb_put(skb, 5);
3469                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3470         }
3471
3472         ieee80211_tx_skb(sdata, skb);
3473         return 0;
3474 }
3475
3476 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3477 {
3478         return !(cs == NULL || cs->cipher == 0 ||
3479                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3480                  cs->hdr_len <= cs->key_idx_off ||
3481                  cs->key_idx_shift > 7 ||
3482                  cs->key_idx_mask == 0);
3483 }
3484
3485 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3486 {
3487         int i;
3488
3489         /* Ensure we have enough iftype bitmap space for all iftype values */
3490         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3491
3492         for (i = 0; i < n; i++)
3493                 if (!ieee80211_cs_valid(&cs[i]))
3494                         return false;
3495
3496         return true;
3497 }
3498
3499 const struct ieee80211_cipher_scheme *
3500 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3501                  enum nl80211_iftype iftype)
3502 {
3503         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3504         int n = local->hw.n_cipher_schemes;
3505         int i;
3506         const struct ieee80211_cipher_scheme *cs = NULL;
3507
3508         for (i = 0; i < n; i++) {
3509                 if (l[i].cipher == cipher) {
3510                         cs = &l[i];
3511                         break;
3512                 }
3513         }
3514
3515         if (!cs || !(cs->iftype & BIT(iftype)))
3516                 return NULL;
3517
3518         return cs;
3519 }
3520
3521 int ieee80211_cs_headroom(struct ieee80211_local *local,
3522                           struct cfg80211_crypto_settings *crypto,
3523                           enum nl80211_iftype iftype)
3524 {
3525         const struct ieee80211_cipher_scheme *cs;
3526         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3527         int i;
3528
3529         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3530                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3531                                       iftype);
3532
3533                 if (cs && headroom < cs->hdr_len)
3534                         headroom = cs->hdr_len;
3535         }
3536
3537         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3538         if (cs && headroom < cs->hdr_len)
3539                 headroom = cs->hdr_len;
3540
3541         return headroom;
3542 }
3543
3544 static bool
3545 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3546 {
3547         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3548         int skip;
3549
3550         if (end > 0)
3551                 return false;
3552
3553         /* One shot NOA  */
3554         if (data->count[i] == 1)
3555                 return false;
3556
3557         if (data->desc[i].interval == 0)
3558                 return false;
3559
3560         /* End time is in the past, check for repetitions */
3561         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3562         if (data->count[i] < 255) {
3563                 if (data->count[i] <= skip) {
3564                         data->count[i] = 0;
3565                         return false;
3566                 }
3567
3568                 data->count[i] -= skip;
3569         }
3570
3571         data->desc[i].start += skip * data->desc[i].interval;
3572
3573         return true;
3574 }
3575
3576 static bool
3577 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3578                              s32 *offset)
3579 {
3580         bool ret = false;
3581         int i;
3582
3583         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3584                 s32 cur;
3585
3586                 if (!data->count[i])
3587                         continue;
3588
3589                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3590                         ret = true;
3591
3592                 cur = data->desc[i].start - tsf;
3593                 if (cur > *offset)
3594                         continue;
3595
3596                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3597                 if (cur > *offset)
3598                         *offset = cur;
3599         }
3600
3601         return ret;
3602 }
3603
3604 static u32
3605 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3606 {
3607         s32 offset = 0;
3608         int tries = 0;
3609         /*
3610          * arbitrary limit, used to avoid infinite loops when combined NoA
3611          * descriptors cover the full time period.
3612          */
3613         int max_tries = 5;
3614
3615         ieee80211_extend_absent_time(data, tsf, &offset);
3616         do {
3617                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3618                         break;
3619
3620                 tries++;
3621         } while (tries < max_tries);
3622
3623         return offset;
3624 }
3625
3626 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3627 {
3628         u32 next_offset = BIT(31) - 1;
3629         int i;
3630
3631         data->absent = 0;
3632         data->has_next_tsf = false;
3633         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3634                 s32 start;
3635
3636                 if (!data->count[i])
3637                         continue;
3638
3639                 ieee80211_extend_noa_desc(data, tsf, i);
3640                 start = data->desc[i].start - tsf;
3641                 if (start <= 0)
3642                         data->absent |= BIT(i);
3643
3644                 if (next_offset > start)
3645                         next_offset = start;
3646
3647                 data->has_next_tsf = true;
3648         }
3649
3650         if (data->absent)
3651                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3652
3653         data->next_tsf = tsf + next_offset;
3654 }
3655 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3656
3657 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3658                             struct ieee80211_noa_data *data, u32 tsf)
3659 {
3660         int ret = 0;
3661         int i;
3662
3663         memset(data, 0, sizeof(*data));
3664
3665         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3666                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3667
3668                 if (!desc->count || !desc->duration)
3669                         continue;
3670
3671                 data->count[i] = desc->count;
3672                 data->desc[i].start = le32_to_cpu(desc->start_time);
3673                 data->desc[i].duration = le32_to_cpu(desc->duration);
3674                 data->desc[i].interval = le32_to_cpu(desc->interval);
3675
3676                 if (data->count[i] > 1 &&
3677                     data->desc[i].interval < data->desc[i].duration)
3678                         continue;
3679
3680                 ieee80211_extend_noa_desc(data, tsf, i);
3681                 ret++;
3682         }
3683
3684         if (ret)
3685                 ieee80211_update_p2p_noa(data, tsf);
3686
3687         return ret;
3688 }
3689 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3690
3691 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3692                            struct ieee80211_sub_if_data *sdata)
3693 {
3694         u64 tsf = drv_get_tsf(local, sdata);
3695         u64 dtim_count = 0;
3696         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3697         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3698         struct ps_data *ps;
3699         u8 bcns_from_dtim;
3700
3701         if (tsf == -1ULL || !beacon_int || !dtim_period)
3702                 return;
3703
3704         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3705             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3706                 if (!sdata->bss)
3707                         return;
3708
3709                 ps = &sdata->bss->ps;
3710         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3711                 ps = &sdata->u.mesh.ps;
3712         } else {
3713                 return;
3714         }
3715
3716         /*
3717          * actually finds last dtim_count, mac80211 will update in
3718          * __beacon_add_tim().
3719          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3720          */
3721         do_div(tsf, beacon_int);
3722         bcns_from_dtim = do_div(tsf, dtim_period);
3723         /* just had a DTIM */
3724         if (!bcns_from_dtim)
3725                 dtim_count = 0;
3726         else
3727                 dtim_count = dtim_period - bcns_from_dtim;
3728
3729         ps->dtim_count = dtim_count;
3730 }
3731
3732 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3733                                          struct ieee80211_chanctx *ctx)
3734 {
3735         struct ieee80211_sub_if_data *sdata;
3736         u8 radar_detect = 0;
3737
3738         lockdep_assert_held(&local->chanctx_mtx);
3739
3740         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3741                 return 0;
3742
3743         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3744                 if (sdata->reserved_radar_required)
3745                         radar_detect |= BIT(sdata->reserved_chandef.width);
3746
3747         /*
3748          * An in-place reservation context should not have any assigned vifs
3749          * until it replaces the other context.
3750          */
3751         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3752                 !list_empty(&ctx->assigned_vifs));
3753
3754         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3755                 if (sdata->radar_required)
3756                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3757
3758         return radar_detect;
3759 }
3760
3761 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3762                                  const struct cfg80211_chan_def *chandef,
3763                                  enum ieee80211_chanctx_mode chanmode,
3764                                  u8 radar_detect)
3765 {
3766         struct ieee80211_local *local = sdata->local;
3767         struct ieee80211_sub_if_data *sdata_iter;
3768         enum nl80211_iftype iftype = sdata->wdev.iftype;
3769         struct ieee80211_chanctx *ctx;
3770         int total = 1;
3771         struct iface_combination_params params = {
3772                 .radar_detect = radar_detect,
3773         };
3774
3775         lockdep_assert_held(&local->chanctx_mtx);
3776
3777         if (WARN_ON(hweight32(radar_detect) > 1))
3778                 return -EINVAL;
3779
3780         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3781                     !chandef->chan))
3782                 return -EINVAL;
3783
3784         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3785                 return -EINVAL;
3786
3787         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3788             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3789                 /*
3790                  * always passing this is harmless, since it'll be the
3791                  * same value that cfg80211 finds if it finds the same
3792                  * interface ... and that's always allowed
3793                  */
3794                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3795         }
3796
3797         /* Always allow software iftypes */
3798         if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3799                 if (radar_detect)
3800                         return -EINVAL;
3801                 return 0;
3802         }
3803
3804         if (chandef)
3805                 params.num_different_channels = 1;
3806
3807         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3808                 params.iftype_num[iftype] = 1;
3809
3810         list_for_each_entry(ctx, &local->chanctx_list, list) {
3811                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3812                         continue;
3813                 params.radar_detect |=
3814                         ieee80211_chanctx_radar_detect(local, ctx);
3815                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3816                         params.num_different_channels++;
3817                         continue;
3818                 }
3819                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3820                     cfg80211_chandef_compatible(chandef,
3821                                                 &ctx->conf.def))
3822                         continue;
3823                 params.num_different_channels++;
3824         }
3825
3826         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3827                 struct wireless_dev *wdev_iter;
3828
3829                 wdev_iter = &sdata_iter->wdev;
3830
3831                 if (sdata_iter == sdata ||
3832                     !ieee80211_sdata_running(sdata_iter) ||
3833                     local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3834                         continue;
3835
3836                 params.iftype_num[wdev_iter->iftype]++;
3837                 total++;
3838         }
3839
3840         if (total == 1 && !params.radar_detect)
3841                 return 0;
3842
3843         return cfg80211_check_combinations(local->hw.wiphy, &params);
3844 }
3845
3846 static void
3847 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3848                          void *data)
3849 {
3850         u32 *max_num_different_channels = data;
3851
3852         *max_num_different_channels = max(*max_num_different_channels,
3853                                           c->num_different_channels);
3854 }
3855
3856 int ieee80211_max_num_channels(struct ieee80211_local *local)
3857 {
3858         struct ieee80211_sub_if_data *sdata;
3859         struct ieee80211_chanctx *ctx;
3860         u32 max_num_different_channels = 1;
3861         int err;
3862         struct iface_combination_params params = {0};
3863
3864         lockdep_assert_held(&local->chanctx_mtx);
3865
3866         list_for_each_entry(ctx, &local->chanctx_list, list) {
3867                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3868                         continue;
3869
3870                 params.num_different_channels++;
3871
3872                 params.radar_detect |=
3873                         ieee80211_chanctx_radar_detect(local, ctx);
3874         }
3875
3876         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3877                 params.iftype_num[sdata->wdev.iftype]++;
3878
3879         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3880                                          ieee80211_iter_max_chans,
3881                                          &max_num_different_channels);
3882         if (err < 0)
3883                 return err;
3884
3885         return max_num_different_channels;
3886 }
3887
3888 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3889 {
3890         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3891         *buf++ = 7; /* len */
3892         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3893         *buf++ = 0x50;
3894         *buf++ = 0xf2;
3895         *buf++ = 2; /* WME */
3896         *buf++ = 0; /* WME info */
3897         *buf++ = 1; /* WME ver */
3898         *buf++ = qosinfo; /* U-APSD no in use */
3899
3900         return buf;
3901 }
3902
3903 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3904                              unsigned long *frame_cnt,
3905                              unsigned long *byte_cnt)
3906 {
3907         struct txq_info *txqi = to_txq_info(txq);
3908         u32 frag_cnt = 0, frag_bytes = 0;
3909         struct sk_buff *skb;
3910
3911         skb_queue_walk(&txqi->frags, skb) {
3912                 frag_cnt++;
3913                 frag_bytes += skb->len;
3914         }
3915
3916         if (frame_cnt)
3917                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3918
3919         if (byte_cnt)
3920                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3921 }
3922 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3923
3924 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3925         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3926         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3927         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3928         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
3929 };