net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2020 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  49 {
  50         struct sk_buff *skb;
  51         struct ieee80211_hdr *hdr;
  52
  53         skb_queue_walk(&tx->skbs, skb) {
  54                 hdr = (struct ieee80211_hdr *) skb->data;
  55                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  56         }
  57 }
  58
  59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  60                              int rate, int erp, int short_preamble,
  61                              int shift)
  62 {
  63         int dur;
  64
  65         /* calculate duration (in microseconds, rounded up to next higher
  66          * integer if it includes a fractional microsecond) to send frame of
  67          * len bytes (does not include FCS) at the given rate. Duration will
  68          * also include SIFS.
  69          *
  70          * rate is in 100 kbps, so divident is multiplied by 10 in the
  71          * DIV_ROUND_UP() operations.
  72          *
  73          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  74          * is assumed to be 0 otherwise.
  75          */
  76
  77         if (band == NL80211_BAND_5GHZ || erp) {
  78                 /*
  79                  * OFDM:
  80                  *
  81                  * N_DBPS = DATARATE x 4
  82                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  83                  *      (16 = SIGNAL time, 6 = tail bits)
  84                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  85                  *
  86                  * T_SYM = 4 usec
  87                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  88                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  89                  *      signal ext = 6 usec
  90                  */
  91                 dur = 16; /* SIFS + signal ext */
  92                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  93                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  94
  95                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  96                  *  * times 4 for 5 MHz
  97                  *  * times 2 for 10 MHz
  98                  */
  99                 dur *= 1 << shift;
 100
 101                 /* rates should already consider the channel bandwidth,
 102                  * don't apply divisor again.
 103                  */
 104                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 105                                         4 * rate); /* T_SYM x N_SYM */
 106         } else {
 107                 /*
 108                  * 802.11b or 802.11g with 802.11b compatibility:
 109                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 110                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 111                  *
 112                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 113                  * aSIFSTime = 10 usec
 114                  * aPreambleLength = 144 usec or 72 usec with short preamble
 115                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 116                  */
 117                 dur = 10; /* aSIFSTime = 10 usec */
 118                 dur += short_preamble ? (72 + 24) : (144 + 48);
 119
 120                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 121         }
 122
 123         return dur;
 124 }
 125
 126 /* Exported duration function for driver use */
 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 128                                         struct ieee80211_vif *vif,
 129                                         enum nl80211_band band,
 130                                         size_t frame_len,
 131                                         struct ieee80211_rate *rate)
 132 {
 133         struct ieee80211_sub_if_data *sdata;
 134         u16 dur;
 135         int erp, shift = 0;
 136         bool short_preamble = false;
 137
 138         erp = 0;
 139         if (vif) {
 140                 sdata = vif_to_sdata(vif);
 141                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 142                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 143                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 144                 shift = ieee80211_vif_get_shift(vif);
 145         }
 146
 147         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 148                                        short_preamble, shift);
 149
 150         return cpu_to_le16(dur);
 151 }
 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 153
 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 155                               struct ieee80211_vif *vif, size_t frame_len,
 156                               const struct ieee80211_tx_info *frame_txctl)
 157 {
 158         struct ieee80211_local *local = hw_to_local(hw);
 159         struct ieee80211_rate *rate;
 160         struct ieee80211_sub_if_data *sdata;
 161         bool short_preamble;
 162         int erp, shift = 0, bitrate;
 163         u16 dur;
 164         struct ieee80211_supported_band *sband;
 165
 166         sband = local->hw.wiphy->bands[frame_txctl->band];
 167
 168         short_preamble = false;
 169
 170         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 171
 172         erp = 0;
 173         if (vif) {
 174                 sdata = vif_to_sdata(vif);
 175                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 176                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 177                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 178                 shift = ieee80211_vif_get_shift(vif);
 179         }
 180
 181         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 182
 183         /* CTS duration */
 184         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 185                                        erp, short_preamble, shift);
 186         /* Data frame duration */
 187         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 188                                         erp, short_preamble, shift);
 189         /* ACK duration */
 190         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 191                                         erp, short_preamble, shift);
 192
 193         return cpu_to_le16(dur);
 194 }
 195 EXPORT_SYMBOL(ieee80211_rts_duration);
 196
 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 198                                     struct ieee80211_vif *vif,
 199                                     size_t frame_len,
 200                                     const struct ieee80211_tx_info *frame_txctl)
 201 {
 202         struct ieee80211_local *local = hw_to_local(hw);
 203         struct ieee80211_rate *rate;
 204         struct ieee80211_sub_if_data *sdata;
 205         bool short_preamble;
 206         int erp, shift = 0, bitrate;
 207         u16 dur;
 208         struct ieee80211_supported_band *sband;
 209
 210         sband = local->hw.wiphy->bands[frame_txctl->band];
 211
 212         short_preamble = false;
 213
 214         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 215         erp = 0;
 216         if (vif) {
 217                 sdata = vif_to_sdata(vif);
 218                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 219                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 220                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 221                 shift = ieee80211_vif_get_shift(vif);
 222         }
 223
 224         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 225
 226         /* Data frame duration */
 227         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 228                                        erp, short_preamble, shift);
 229         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 230                 /* ACK duration */
 231                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                                 erp, short_preamble, shift);
 233         }
 234
 235         return cpu_to_le16(dur);
 236 }
 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 238
 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 240 {
 241         struct ieee80211_local *local = sdata->local;
 242         struct ieee80211_vif *vif = &sdata->vif;
 243         struct fq *fq = &local->fq;
 244         struct ps_data *ps = NULL;
 245         struct txq_info *txqi;
 246         struct sta_info *sta;
 247         int i;
 248
 249         local_bh_disable();
 250         spin_lock(&fq->lock);
 251
 252         if (sdata->vif.type == NL80211_IFTYPE_AP)
 253                 ps = &sdata->bss->ps;
 254
 255         sdata->vif.txqs_stopped[ac] = false;
 256
 257         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 258                 if (sdata != sta->sdata)
 259                         continue;
 260
 261                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 262                         struct ieee80211_txq *txq = sta->sta.txq[i];
 263
 264                         if (!txq)
 265                                 continue;
 266
 267                         txqi = to_txq_info(txq);
 268
 269                         if (ac != txq->ac)
 270                                 continue;
 271
 272                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 273                                                 &txqi->flags))
 274                                 continue;
 275
 276                         spin_unlock(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock(&fq->lock);
 279                 }
 280         }
 281
 282         if (!vif->txq)
 283                 goto out;
 284
 285         txqi = to_txq_info(vif->txq);
 286
 287         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 288             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 289                 goto out;
 290
 291         spin_unlock(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         local_bh_enable();
 295         return;
 296 out:
 297         spin_unlock(&fq->lock);
 298         local_bh_enable();
 299 }
 300
 301 static void
 302 __releases(&local->queue_stop_reason_lock)
 303 __acquires(&local->queue_stop_reason_lock)
 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         int n_acs = IEEE80211_NUM_ACS;
 308         int i;
 309
 310         rcu_read_lock();
 311
 312         if (local->hw.queues < IEEE80211_NUM_ACS)
 313                 n_acs = 1;
 314
 315         for (i = 0; i < local->hw.queues; i++) {
 316                 if (local->queue_stop_reasons[i])
 317                         continue;
 318
 319                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 320                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 321                         int ac;
 322
 323                         for (ac = 0; ac < n_acs; ac++) {
 324                                 int ac_queue = sdata->vif.hw_queue[ac];
 325
 326                                 if (ac_queue == i ||
 327                                     sdata->vif.cab_queue == i)
 328                                         __ieee80211_wake_txqs(sdata, ac);
 329                         }
 330                 }
 331                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 332         }
 333
 334         rcu_read_unlock();
 335 }
 336
 337 void ieee80211_wake_txqs(unsigned long data)
 338 {
 339         struct ieee80211_local *local = (struct ieee80211_local *)data;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 343         _ieee80211_wake_txqs(local, &flags);
 344         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 345 }
 346
 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 348 {
 349         struct ieee80211_sub_if_data *sdata;
 350         int n_acs = IEEE80211_NUM_ACS;
 351
 352         if (local->ops->wake_tx_queue)
 353                 return;
 354
 355         if (local->hw.queues < IEEE80211_NUM_ACS)
 356                 n_acs = 1;
 357
 358         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 359                 int ac;
 360
 361                 if (!sdata->dev)
 362                         continue;
 363
 364                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 365                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 366                         continue;
 367
 368                 for (ac = 0; ac < n_acs; ac++) {
 369                         int ac_queue = sdata->vif.hw_queue[ac];
 370
 371                         if (ac_queue == queue ||
 372                             (sdata->vif.cab_queue == queue &&
 373                              local->queue_stop_reasons[ac_queue] == 0 &&
 374                              skb_queue_empty(&local->pending[ac_queue])))
 375                                 netif_wake_subqueue(sdata->dev, ac);
 376                 }
 377         }
 378 }
 379
 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 381                                    enum queue_stop_reason reason,
 382                                    bool refcounted,
 383                                    unsigned long *flags)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386
 387         trace_wake_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (!refcounted) {
 396                 local->q_stop_reasons[queue][reason] = 0;
 397         } else {
 398                 local->q_stop_reasons[queue][reason]--;
 399                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 400                         local->q_stop_reasons[queue][reason] = 0;
 401         }
 402
 403         if (local->q_stop_reasons[queue][reason] == 0)
 404                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 405
 406         if (local->queue_stop_reasons[queue] != 0)
 407                 /* someone still has this queue stopped */
 408                 return;
 409
 410         if (skb_queue_empty(&local->pending[queue])) {
 411                 rcu_read_lock();
 412                 ieee80211_propagate_queue_wake(local, queue);
 413                 rcu_read_unlock();
 414         } else
 415                 tasklet_schedule(&local->tx_pending_tasklet);
 416
 417         /*
 418          * Calling _ieee80211_wake_txqs here can be a problem because it may
 419          * release queue_stop_reason_lock which has been taken by
 420          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 421          * release someone's lock, but it is fine because all the callers of
 422          * __ieee80211_wake_queue call it right before releasing the lock.
 423          */
 424         if (local->ops->wake_tx_queue) {
 425                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 426                         tasklet_schedule(&local->wake_txqs_tasklet);
 427                 else
 428                         _ieee80211_wake_txqs(local, flags);
 429         }
 430 }
 431
 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 433                                     enum queue_stop_reason reason,
 434                                     bool refcounted)
 435 {
 436         struct ieee80211_local *local = hw_to_local(hw);
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 440         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 441         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 442 }
 443
 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 445 {
 446         ieee80211_wake_queue_by_reason(hw, queue,
 447                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 448                                        false);
 449 }
 450 EXPORT_SYMBOL(ieee80211_wake_queue);
 451
 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 453                                    enum queue_stop_reason reason,
 454                                    bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         struct ieee80211_sub_if_data *sdata;
 458         int n_acs = IEEE80211_NUM_ACS;
 459
 460         trace_stop_queue(local, queue, reason);
 461
 462         if (WARN_ON(queue >= hw->queues))
 463                 return;
 464
 465         if (!refcounted)
 466                 local->q_stop_reasons[queue][reason] = 1;
 467         else
 468                 local->q_stop_reasons[queue][reason]++;
 469
 470         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 471                 return;
 472
 473         if (local->hw.queues < IEEE80211_NUM_ACS)
 474                 n_acs = 1;
 475
 476         rcu_read_lock();
 477         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 478                 int ac;
 479
 480                 if (!sdata->dev)
 481                         continue;
 482
 483                 for (ac = 0; ac < n_acs; ac++) {
 484                         if (sdata->vif.hw_queue[ac] == queue ||
 485                             sdata->vif.cab_queue == queue) {
 486                                 if (!local->ops->wake_tx_queue) {
 487                                         netif_stop_subqueue(sdata->dev, ac);
 488                                         continue;
 489                                 }
 490                                 spin_lock(&local->fq.lock);
 491                                 sdata->vif.txqs_stopped[ac] = true;
 492                                 spin_unlock(&local->fq.lock);
 493                         }
 494                 }
 495         }
 496         rcu_read_unlock();
 497 }
 498
 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 500                                     enum queue_stop_reason reason,
 501                                     bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504         unsigned long flags;
 505
 506         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 507         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 512 {
 513         ieee80211_stop_queue_by_reason(hw, queue,
 514                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                        false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queue);
 518
 519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 520                                struct sk_buff *skb)
 521 {
 522         struct ieee80211_hw *hw = &local->hw;
 523         unsigned long flags;
 524         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 525         int queue = info->hw_queue;
 526
 527         if (WARN_ON(!info->control.vif)) {
 528                 ieee80211_free_txskb(&local->hw, skb);
 529                 return;
 530         }
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 534                                false);
 535         __skb_queue_tail(&local->pending[queue], skb);
 536         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 537                                false, &flags);
 538         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 539 }
 540
 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 542                                 struct sk_buff_head *skbs)
 543 {
 544         struct ieee80211_hw *hw = &local->hw;
 545         struct sk_buff *skb;
 546         unsigned long flags;
 547         int queue, i;
 548
 549         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 550         while ((skb = skb_dequeue(skbs))) {
 551                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 552
 553                 if (WARN_ON(!info->control.vif)) {
 554                         ieee80211_free_txskb(&local->hw, skb);
 555                         continue;
 556                 }
 557
 558                 queue = info->hw_queue;
 559
 560                 __ieee80211_stop_queue(hw, queue,
 561                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 562                                 false);
 563
 564                 __skb_queue_tail(&local->pending[queue], skb);
 565         }
 566
 567         for (i = 0; i < hw->queues; i++)
 568                 __ieee80211_wake_queue(hw, i,
 569                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570                         false, &flags);
 571         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 572 }
 573
 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 575                                      unsigned long queues,
 576                                      enum queue_stop_reason reason,
 577                                      bool refcounted)
 578 {
 579         struct ieee80211_local *local = hw_to_local(hw);
 580         unsigned long flags;
 581         int i;
 582
 583         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 584
 585         for_each_set_bit(i, &queues, hw->queues)
 586                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 587
 588         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 589 }
 590
 591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 592 {
 593         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 594                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 595                                         false);
 596 }
 597 EXPORT_SYMBOL(ieee80211_stop_queues);
 598
 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int ret;
 604
 605         if (WARN_ON(queue >= hw->queues))
 606                 return true;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 610                        &local->queue_stop_reasons[queue]);
 611         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 612         return ret;
 613 }
 614 EXPORT_SYMBOL(ieee80211_queue_stopped);
 615
 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 617                                      unsigned long queues,
 618                                      enum queue_stop_reason reason,
 619                                      bool refcounted)
 620 {
 621         struct ieee80211_local *local = hw_to_local(hw);
 622         unsigned long flags;
 623         int i;
 624
 625         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 626
 627         for_each_set_bit(i, &queues, hw->queues)
 628                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 629
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 634 {
 635         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 636                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 637                                         false);
 638 }
 639 EXPORT_SYMBOL(ieee80211_wake_queues);
 640
 641 static unsigned int
 642 ieee80211_get_vif_queues(struct ieee80211_local *local,
 643                          struct ieee80211_sub_if_data *sdata)
 644 {
 645         unsigned int queues;
 646
 647         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 648                 int ac;
 649
 650                 queues = 0;
 651
 652                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 653                         queues |= BIT(sdata->vif.hw_queue[ac]);
 654                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 655                         queues |= BIT(sdata->vif.cab_queue);
 656         } else {
 657                 /* all queues */
 658                 queues = BIT(local->hw.queues) - 1;
 659         }
 660
 661         return queues;
 662 }
 663
 664 void __ieee80211_flush_queues(struct ieee80211_local *local,
 665                               struct ieee80211_sub_if_data *sdata,
 666                               unsigned int queues, bool drop)
 667 {
 668         if (!local->ops->flush)
 669                 return;
 670
 671         /*
 672          * If no queue was set, or if the HW doesn't support
 673          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 674          */
 675         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 676                 queues = ieee80211_get_vif_queues(local, sdata);
 677
 678         ieee80211_stop_queues_by_reason(&local->hw, queues,
 679                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 680                                         false);
 681
 682         drv_flush(local, sdata, queues, drop);
 683
 684         ieee80211_wake_queues_by_reason(&local->hw, queues,
 685                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 686                                         false);
 687 }
 688
 689 void ieee80211_flush_queues(struct ieee80211_local *local,
 690                             struct ieee80211_sub_if_data *sdata, bool drop)
 691 {
 692         __ieee80211_flush_queues(local, sdata, 0, drop);
 693 }
 694
 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 696                                struct ieee80211_sub_if_data *sdata,
 697                                enum queue_stop_reason reason)
 698 {
 699         ieee80211_stop_queues_by_reason(&local->hw,
 700                                         ieee80211_get_vif_queues(local, sdata),
 701                                         reason, true);
 702 }
 703
 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 705                                struct ieee80211_sub_if_data *sdata,
 706                                enum queue_stop_reason reason)
 707 {
 708         ieee80211_wake_queues_by_reason(&local->hw,
 709                                         ieee80211_get_vif_queues(local, sdata),
 710                                         reason, true);
 711 }
 712
 713 static void __iterate_interfaces(struct ieee80211_local *local,
 714                                  u32 iter_flags,
 715                                  void (*iterator)(void *data, u8 *mac,
 716                                                   struct ieee80211_vif *vif),
 717                                  void *data)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 721
 722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 723                 switch (sdata->vif.type) {
 724                 case NL80211_IFTYPE_MONITOR:
 725                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 726                                 continue;
 727                         break;
 728                 case NL80211_IFTYPE_AP_VLAN:
 729                         continue;
 730                 default:
 731                         break;
 732                 }
 733                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 734                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 735                         continue;
 736                 if (ieee80211_sdata_running(sdata) || !active_only)
 737                         iterator(data, sdata->vif.addr,
 738                                  &sdata->vif);
 739         }
 740
 741         sdata = rcu_dereference_check(local->monitor_sdata,
 742                                       lockdep_is_held(&local->iflist_mtx) ||
 743                                       lockdep_rtnl_is_held());
 744         if (sdata &&
 745             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 746              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 747                 iterator(data, sdata->vif.addr, &sdata->vif);
 748 }
 749
 750 void ieee80211_iterate_interfaces(
 751         struct ieee80211_hw *hw, u32 iter_flags,
 752         void (*iterator)(void *data, u8 *mac,
 753                          struct ieee80211_vif *vif),
 754         void *data)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         mutex_lock(&local->iflist_mtx);
 759         __iterate_interfaces(local, iter_flags, iterator, data);
 760         mutex_unlock(&local->iflist_mtx);
 761 }
 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 763
 764 void ieee80211_iterate_active_interfaces_atomic(
 765         struct ieee80211_hw *hw, u32 iter_flags,
 766         void (*iterator)(void *data, u8 *mac,
 767                          struct ieee80211_vif *vif),
 768         void *data)
 769 {
 770         struct ieee80211_local *local = hw_to_local(hw);
 771
 772         rcu_read_lock();
 773         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 774                              iterator, data);
 775         rcu_read_unlock();
 776 }
 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 778
 779 void ieee80211_iterate_active_interfaces_rtnl(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         ASSERT_RTNL();
 788
 789         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 790                              iterator, data);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 793
 794 static void __iterate_stations(struct ieee80211_local *local,
 795                                void (*iterator)(void *data,
 796                                                 struct ieee80211_sta *sta),
 797                                void *data)
 798 {
 799         struct sta_info *sta;
 800
 801         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 802                 if (!sta->uploaded)
 803                         continue;
 804
 805                 iterator(data, &sta->sta);
 806         }
 807 }
 808
 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 810                         void (*iterator)(void *data,
 811                                          struct ieee80211_sta *sta),
 812                         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         rcu_read_lock();
 817         __iterate_stations(local, iterator, data);
 818         rcu_read_unlock();
 819 }
 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 821
 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 825
 826         if (!ieee80211_sdata_running(sdata) ||
 827             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 828                 return NULL;
 829         return &sdata->vif;
 830 }
 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 832
 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 834 {
 835         struct ieee80211_sub_if_data *sdata;
 836
 837         if (!vif)
 838                 return NULL;
 839
 840         sdata = vif_to_sdata(vif);
 841
 842         if (!ieee80211_sdata_running(sdata) ||
 843             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 844                 return NULL;
 845
 846         return &sdata->wdev;
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 849
 850 /*
 851  * Nothing should have been stuffed into the workqueue during
 852  * the suspend->resume cycle. Since we can't check each caller
 853  * of this function if we are already quiescing / suspended,
 854  * check here and don't WARN since this can actually happen when
 855  * the rx path (for example) is racing against __ieee80211_suspend
 856  * and suspending / quiescing was set after the rx path checked
 857  * them.
 858  */
 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 860 {
 861         if (local->quiescing || (local->suspended && !local->resuming)) {
 862                 pr_warn("queueing ieee80211 work while going to suspend\n");
 863                 return false;
 864         }
 865
 866         return true;
 867 }
 868
 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 870 {
 871         struct ieee80211_local *local = hw_to_local(hw);
 872
 873         if (!ieee80211_can_queue_work(local))
 874                 return;
 875
 876         queue_work(local->workqueue, work);
 877 }
 878 EXPORT_SYMBOL(ieee80211_queue_work);
 879
 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 881                                   struct delayed_work *dwork,
 882                                   unsigned long delay)
 883 {
 884         struct ieee80211_local *local = hw_to_local(hw);
 885
 886         if (!ieee80211_can_queue_work(local))
 887                 return;
 888
 889         queue_delayed_work(local->workqueue, dwork, delay);
 890 }
 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 892
 893 static void ieee80211_parse_extension_element(u32 *crc,
 894                                               const struct element *elem,
 895                                               struct ieee802_11_elems *elems)
 896 {
 897         const void *data = elem->data + 1;
 898         u8 len = elem->datalen - 1;
 899
 900         switch (elem->data[0]) {
 901         case WLAN_EID_EXT_HE_MU_EDCA:
 902                 if (len == sizeof(*elems->mu_edca_param_set)) {
 903                         elems->mu_edca_param_set = data;
 904                         if (crc)
 905                                 *crc = crc32_be(*crc, (void *)elem,
 906                                                 elem->datalen + 2);
 907                 }
 908                 break;
 909         case WLAN_EID_EXT_HE_CAPABILITY:
 910                 elems->he_cap = data;
 911                 elems->he_cap_len = len;
 912                 break;
 913         case WLAN_EID_EXT_HE_OPERATION:
 914                 if (len >= sizeof(*elems->he_operation) &&
 915                     len == ieee80211_he_oper_size(data) - 1)
 916                         elems->he_operation = data;
 917                 break;
 918         case WLAN_EID_EXT_UORA:
 919                 if (len == 1)
 920                         elems->uora_element = data;
 921                 break;
 922         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 923                 if (len == 3)
 924                         elems->max_channel_switch_time = data;
 925                 break;
 926         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 927                 if (len == sizeof(*elems->mbssid_config_ie))
 928                         elems->mbssid_config_ie = data;
 929                 break;
 930         case WLAN_EID_EXT_HE_SPR:
 931                 if (len >= sizeof(*elems->he_spr) &&
 932                     len >= ieee80211_he_spr_size(data))
 933                         elems->he_spr = data;
 934                 break;
 935         }
 936 }
 937
 938 static u32
 939 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 940                             struct ieee802_11_elems *elems,
 941                             u64 filter, u32 crc,
 942                             const struct element *check_inherit)
 943 {
 944         const struct element *elem;
 945         bool calc_crc = filter != 0;
 946         DECLARE_BITMAP(seen_elems, 256);
 947         const u8 *ie;
 948
 949         bitmap_zero(seen_elems, 256);
 950
 951         for_each_element(elem, start, len) {
 952                 bool elem_parse_failed;
 953                 u8 id = elem->id;
 954                 u8 elen = elem->datalen;
 955                 const u8 *pos = elem->data;
 956
 957                 if (check_inherit &&
 958                     !cfg80211_is_element_inherited(elem,
 959                                                    check_inherit))
 960                         continue;
 961
 962                 switch (id) {
 963                 case WLAN_EID_SSID:
 964                 case WLAN_EID_SUPP_RATES:
 965                 case WLAN_EID_FH_PARAMS:
 966                 case WLAN_EID_DS_PARAMS:
 967                 case WLAN_EID_CF_PARAMS:
 968                 case WLAN_EID_TIM:
 969                 case WLAN_EID_IBSS_PARAMS:
 970                 case WLAN_EID_CHALLENGE:
 971                 case WLAN_EID_RSN:
 972                 case WLAN_EID_ERP_INFO:
 973                 case WLAN_EID_EXT_SUPP_RATES:
 974                 case WLAN_EID_HT_CAPABILITY:
 975                 case WLAN_EID_HT_OPERATION:
 976                 case WLAN_EID_VHT_CAPABILITY:
 977                 case WLAN_EID_VHT_OPERATION:
 978                 case WLAN_EID_MESH_ID:
 979                 case WLAN_EID_MESH_CONFIG:
 980                 case WLAN_EID_PEER_MGMT:
 981                 case WLAN_EID_PREQ:
 982                 case WLAN_EID_PREP:
 983                 case WLAN_EID_PERR:
 984                 case WLAN_EID_RANN:
 985                 case WLAN_EID_CHANNEL_SWITCH:
 986                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 987                 case WLAN_EID_COUNTRY:
 988                 case WLAN_EID_PWR_CONSTRAINT:
 989                 case WLAN_EID_TIMEOUT_INTERVAL:
 990                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 991                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 992                 case WLAN_EID_CHAN_SWITCH_PARAM:
 993                 case WLAN_EID_EXT_CAPABILITY:
 994                 case WLAN_EID_CHAN_SWITCH_TIMING:
 995                 case WLAN_EID_LINK_ID:
 996                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 997                 case WLAN_EID_RSNX:
 998                 /*
 999                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1000                  * that if the content gets bigger it might be needed more than once
1001                  */
1002                         if (test_bit(id, seen_elems)) {
1003                                 elems->parse_error = true;
1004                                 continue;
1005                         }
1006                         break;
1007                 }
1008
1009                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1010                         crc = crc32_be(crc, pos - 2, elen + 2);
1011
1012                 elem_parse_failed = false;
1013
1014                 switch (id) {
1015                 case WLAN_EID_LINK_ID:
1016                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1017                                 elem_parse_failed = true;
1018                                 break;
1019                         }
1020                         elems->lnk_id = (void *)(pos - 2);
1021                         break;
1022                 case WLAN_EID_CHAN_SWITCH_TIMING:
1023                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1024                                 elem_parse_failed = true;
1025                                 break;
1026                         }
1027                         elems->ch_sw_timing = (void *)pos;
1028                         break;
1029                 case WLAN_EID_EXT_CAPABILITY:
1030                         elems->ext_capab = pos;
1031                         elems->ext_capab_len = elen;
1032                         break;
1033                 case WLAN_EID_SSID:
1034                         elems->ssid = pos;
1035                         elems->ssid_len = elen;
1036                         break;
1037                 case WLAN_EID_SUPP_RATES:
1038                         elems->supp_rates = pos;
1039                         elems->supp_rates_len = elen;
1040                         break;
1041                 case WLAN_EID_DS_PARAMS:
1042                         if (elen >= 1)
1043                                 elems->ds_params = pos;
1044                         else
1045                                 elem_parse_failed = true;
1046                         break;
1047                 case WLAN_EID_TIM:
1048                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1049                                 elems->tim = (void *)pos;
1050                                 elems->tim_len = elen;
1051                         } else
1052                                 elem_parse_failed = true;
1053                         break;
1054                 case WLAN_EID_CHALLENGE:
1055                         elems->challenge = pos;
1056                         elems->challenge_len = elen;
1057                         break;
1058                 case WLAN_EID_VENDOR_SPECIFIC:
1059                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1060                             pos[2] == 0xf2) {
1061                                 /* Microsoft OUI (00:50:F2) */
1062
1063                                 if (calc_crc)
1064                                         crc = crc32_be(crc, pos - 2, elen + 2);
1065
1066                                 if (elen >= 5 && pos[3] == 2) {
1067                                         /* OUI Type 2 - WMM IE */
1068                                         if (pos[4] == 0) {
1069                                                 elems->wmm_info = pos;
1070                                                 elems->wmm_info_len = elen;
1071                                         } else if (pos[4] == 1) {
1072                                                 elems->wmm_param = pos;
1073                                                 elems->wmm_param_len = elen;
1074                                         }
1075                                 }
1076                         }
1077                         break;
1078                 case WLAN_EID_RSN:
1079                         elems->rsn = pos;
1080                         elems->rsn_len = elen;
1081                         break;
1082                 case WLAN_EID_ERP_INFO:
1083                         if (elen >= 1)
1084                                 elems->erp_info = pos;
1085                         else
1086                                 elem_parse_failed = true;
1087                         break;
1088                 case WLAN_EID_EXT_SUPP_RATES:
1089                         elems->ext_supp_rates = pos;
1090                         elems->ext_supp_rates_len = elen;
1091                         break;
1092                 case WLAN_EID_HT_CAPABILITY:
1093                         if (elen >= sizeof(struct ieee80211_ht_cap))
1094                                 elems->ht_cap_elem = (void *)pos;
1095                         else
1096                                 elem_parse_failed = true;
1097                         break;
1098                 case WLAN_EID_HT_OPERATION:
1099                         if (elen >= sizeof(struct ieee80211_ht_operation))
1100                                 elems->ht_operation = (void *)pos;
1101                         else
1102                                 elem_parse_failed = true;
1103                         break;
1104                 case WLAN_EID_VHT_CAPABILITY:
1105                         if (elen >= sizeof(struct ieee80211_vht_cap))
1106                                 elems->vht_cap_elem = (void *)pos;
1107                         else
1108                                 elem_parse_failed = true;
1109                         break;
1110                 case WLAN_EID_VHT_OPERATION:
1111                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1112                                 elems->vht_operation = (void *)pos;
1113                                 if (calc_crc)
1114                                         crc = crc32_be(crc, pos - 2, elen + 2);
1115                                 break;
1116                         }
1117                         elem_parse_failed = true;
1118                         break;
1119                 case WLAN_EID_OPMODE_NOTIF:
1120                         if (elen > 0) {
1121                                 elems->opmode_notif = pos;
1122                                 if (calc_crc)
1123                                         crc = crc32_be(crc, pos - 2, elen + 2);
1124                                 break;
1125                         }
1126                         elem_parse_failed = true;
1127                         break;
1128                 case WLAN_EID_MESH_ID:
1129                         elems->mesh_id = pos;
1130                         elems->mesh_id_len = elen;
1131                         break;
1132                 case WLAN_EID_MESH_CONFIG:
1133                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1134                                 elems->mesh_config = (void *)pos;
1135                         else
1136                                 elem_parse_failed = true;
1137                         break;
1138                 case WLAN_EID_PEER_MGMT:
1139                         elems->peering = pos;
1140                         elems->peering_len = elen;
1141                         break;
1142                 case WLAN_EID_MESH_AWAKE_WINDOW:
1143                         if (elen >= 2)
1144                                 elems->awake_window = (void *)pos;
1145                         break;
1146                 case WLAN_EID_PREQ:
1147                         elems->preq = pos;
1148                         elems->preq_len = elen;
1149                         break;
1150                 case WLAN_EID_PREP:
1151                         elems->prep = pos;
1152                         elems->prep_len = elen;
1153                         break;
1154                 case WLAN_EID_PERR:
1155                         elems->perr = pos;
1156                         elems->perr_len = elen;
1157                         break;
1158                 case WLAN_EID_RANN:
1159                         if (elen >= sizeof(struct ieee80211_rann_ie))
1160                                 elems->rann = (void *)pos;
1161                         else
1162                                 elem_parse_failed = true;
1163                         break;
1164                 case WLAN_EID_CHANNEL_SWITCH:
1165                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1166                                 elem_parse_failed = true;
1167                                 break;
1168                         }
1169                         elems->ch_switch_ie = (void *)pos;
1170                         break;
1171                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1172                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1173                                 elem_parse_failed = true;
1174                                 break;
1175                         }
1176                         elems->ext_chansw_ie = (void *)pos;
1177                         break;
1178                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1179                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1180                                 elem_parse_failed = true;
1181                                 break;
1182                         }
1183                         elems->sec_chan_offs = (void *)pos;
1184                         break;
1185                 case WLAN_EID_CHAN_SWITCH_PARAM:
1186                         if (elen !=
1187                             sizeof(*elems->mesh_chansw_params_ie)) {
1188                                 elem_parse_failed = true;
1189                                 break;
1190                         }
1191                         elems->mesh_chansw_params_ie = (void *)pos;
1192                         break;
1193                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1194                         if (!action ||
1195                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1196                                 elem_parse_failed = true;
1197                                 break;
1198                         }
1199                         elems->wide_bw_chansw_ie = (void *)pos;
1200                         break;
1201                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1202                         if (action) {
1203                                 elem_parse_failed = true;
1204                                 break;
1205                         }
1206                         /*
1207                          * This is a bit tricky, but as we only care about
1208                          * the wide bandwidth channel switch element, so
1209                          * just parse it out manually.
1210                          */
1211                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1212                                               pos, elen);
1213                         if (ie) {
1214                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1215                                         elems->wide_bw_chansw_ie =
1216                                                 (void *)(ie + 2);
1217                                 else
1218                                         elem_parse_failed = true;
1219                         }
1220                         break;
1221                 case WLAN_EID_COUNTRY:
1222                         elems->country_elem = pos;
1223                         elems->country_elem_len = elen;
1224                         break;
1225                 case WLAN_EID_PWR_CONSTRAINT:
1226                         if (elen != 1) {
1227                                 elem_parse_failed = true;
1228                                 break;
1229                         }
1230                         elems->pwr_constr_elem = pos;
1231                         break;
1232                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1233                         /* Lots of different options exist, but we only care
1234                          * about the Dynamic Transmit Power Control element.
1235                          * First check for the Cisco OUI, then for the DTPC
1236                          * tag (0x00).
1237                          */
1238                         if (elen < 4) {
1239                                 elem_parse_failed = true;
1240                                 break;
1241                         }
1242
1243                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1244                             pos[2] != 0x96 || pos[3] != 0x00)
1245                                 break;
1246
1247                         if (elen != 6) {
1248                                 elem_parse_failed = true;
1249                                 break;
1250                         }
1251
1252                         if (calc_crc)
1253                                 crc = crc32_be(crc, pos - 2, elen + 2);
1254
1255                         elems->cisco_dtpc_elem = pos;
1256                         break;
1257                 case WLAN_EID_ADDBA_EXT:
1258                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1259                                 elem_parse_failed = true;
1260                                 break;
1261                         }
1262                         elems->addba_ext_ie = (void *)pos;
1263                         break;
1264                 case WLAN_EID_TIMEOUT_INTERVAL:
1265                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1266                                 elems->timeout_int = (void *)pos;
1267                         else
1268                                 elem_parse_failed = true;
1269                         break;
1270                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1271                         if (elen >= sizeof(*elems->max_idle_period_ie))
1272                                 elems->max_idle_period_ie = (void *)pos;
1273                         break;
1274                 case WLAN_EID_RSNX:
1275                         elems->rsnx = pos;
1276                         elems->rsnx_len = elen;
1277                         break;
1278                 case WLAN_EID_EXTENSION:
1279                         ieee80211_parse_extension_element(calc_crc ?
1280                                                                 &crc : NULL,
1281                                                           elem, elems);
1282                         break;
1283                 default:
1284                         break;
1285                 }
1286
1287                 if (elem_parse_failed)
1288                         elems->parse_error = true;
1289                 else
1290                         __set_bit(id, seen_elems);
1291         }
1292
1293         if (!for_each_element_completed(elem, start, len))
1294                 elems->parse_error = true;
1295
1296         return crc;
1297 }
1298
1299 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1300                                             struct ieee802_11_elems *elems,
1301                                             u8 *transmitter_bssid,
1302                                             u8 *bss_bssid,
1303                                             u8 *nontransmitted_profile)
1304 {
1305         const struct element *elem, *sub;
1306         size_t profile_len = 0;
1307         bool found = false;
1308
1309         if (!bss_bssid || !transmitter_bssid)
1310                 return profile_len;
1311
1312         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1313                 if (elem->datalen < 2)
1314                         continue;
1315
1316                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1317                         u8 new_bssid[ETH_ALEN];
1318                         const u8 *index;
1319
1320                         if (sub->id != 0 || sub->datalen < 4) {
1321                                 /* not a valid BSS profile */
1322                                 continue;
1323                         }
1324
1325                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1326                             sub->data[1] != 2) {
1327                                 /* The first element of the
1328                                  * Nontransmitted BSSID Profile is not
1329                                  * the Nontransmitted BSSID Capability
1330                                  * element.
1331                                  */
1332                                 continue;
1333                         }
1334
1335                         memset(nontransmitted_profile, 0, len);
1336                         profile_len = cfg80211_merge_profile(start, len,
1337                                                              elem,
1338                                                              sub,
1339                                                              nontransmitted_profile,
1340                                                              len);
1341
1342                         /* found a Nontransmitted BSSID Profile */
1343                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1344                                                  nontransmitted_profile,
1345                                                  profile_len);
1346                         if (!index || index[1] < 1 || index[2] == 0) {
1347                                 /* Invalid MBSSID Index element */
1348                                 continue;
1349                         }
1350
1351                         cfg80211_gen_new_bssid(transmitter_bssid,
1352                                                elem->data[0],
1353                                                index[2],
1354                                                new_bssid);
1355                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1356                                 found = true;
1357                                 elems->bssid_index_len = index[1];
1358                                 elems->bssid_index = (void *)&index[2];
1359                                 break;
1360                         }
1361                 }
1362         }
1363
1364         return found ? profile_len : 0;
1365 }
1366
1367 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1368                                struct ieee802_11_elems *elems,
1369                                u64 filter, u32 crc, u8 *transmitter_bssid,
1370                                u8 *bss_bssid)
1371 {
1372         const struct element *non_inherit = NULL;
1373         u8 *nontransmitted_profile;
1374         int nontransmitted_profile_len = 0;
1375
1376         memset(elems, 0, sizeof(*elems));
1377         elems->ie_start = start;
1378         elems->total_len = len;
1379
1380         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1381         if (nontransmitted_profile) {
1382                 nontransmitted_profile_len =
1383                         ieee802_11_find_bssid_profile(start, len, elems,
1384                                                       transmitter_bssid,
1385                                                       bss_bssid,
1386                                                       nontransmitted_profile);
1387                 non_inherit =
1388                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1389                                                nontransmitted_profile,
1390                                                nontransmitted_profile_len);
1391         }
1392
1393         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1394                                           crc, non_inherit);
1395
1396         /* Override with nontransmitted profile, if found */
1397         if (nontransmitted_profile_len)
1398                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1399                                             nontransmitted_profile_len,
1400                                             action, elems, 0, 0, NULL);
1401
1402         if (elems->tim && !elems->parse_error) {
1403                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1404
1405                 elems->dtim_period = tim_ie->dtim_period;
1406                 elems->dtim_count = tim_ie->dtim_count;
1407         }
1408
1409         /* Override DTIM period and count if needed */
1410         if (elems->bssid_index &&
1411             elems->bssid_index_len >=
1412             offsetofend(struct ieee80211_bssid_index, dtim_period))
1413                 elems->dtim_period = elems->bssid_index->dtim_period;
1414
1415         if (elems->bssid_index &&
1416             elems->bssid_index_len >=
1417             offsetofend(struct ieee80211_bssid_index, dtim_count))
1418                 elems->dtim_count = elems->bssid_index->dtim_count;
1419
1420         kfree(nontransmitted_profile);
1421
1422         return crc;
1423 }
1424
1425 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1426                                            struct ieee80211_tx_queue_params
1427                                            *qparam, int ac)
1428 {
1429         struct ieee80211_chanctx_conf *chanctx_conf;
1430         const struct ieee80211_reg_rule *rrule;
1431         const struct ieee80211_wmm_ac *wmm_ac;
1432         u16 center_freq = 0;
1433
1434         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1435             sdata->vif.type != NL80211_IFTYPE_STATION)
1436                 return;
1437
1438         rcu_read_lock();
1439         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1440         if (chanctx_conf)
1441                 center_freq = chanctx_conf->def.chan->center_freq;
1442
1443         if (!center_freq) {
1444                 rcu_read_unlock();
1445                 return;
1446         }
1447
1448         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1449
1450         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1451                 rcu_read_unlock();
1452                 return;
1453         }
1454
1455         if (sdata->vif.type == NL80211_IFTYPE_AP)
1456                 wmm_ac = &rrule->wmm_rule.ap[ac];
1457         else
1458                 wmm_ac = &rrule->wmm_rule.client[ac];
1459         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1460         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1461         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1462         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1463         rcu_read_unlock();
1464 }
1465
1466 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1467                                bool bss_notify, bool enable_qos)
1468 {
1469         struct ieee80211_local *local = sdata->local;
1470         struct ieee80211_tx_queue_params qparam;
1471         struct ieee80211_chanctx_conf *chanctx_conf;
1472         int ac;
1473         bool use_11b;
1474         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1475         int aCWmin, aCWmax;
1476
1477         if (!local->ops->conf_tx)
1478                 return;
1479
1480         if (local->hw.queues < IEEE80211_NUM_ACS)
1481                 return;
1482
1483         memset(&qparam, 0, sizeof(qparam));
1484
1485         rcu_read_lock();
1486         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1487         use_11b = (chanctx_conf &&
1488                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1489                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1490         rcu_read_unlock();
1491
1492         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1493
1494         /* Set defaults according to 802.11-2007 Table 7-37 */
1495         aCWmax = 1023;
1496         if (use_11b)
1497                 aCWmin = 31;
1498         else
1499                 aCWmin = 15;
1500
1501         /* Confiure old 802.11b/g medium access rules. */
1502         qparam.cw_max = aCWmax;
1503         qparam.cw_min = aCWmin;
1504         qparam.txop = 0;
1505         qparam.aifs = 2;
1506
1507         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1508                 /* Update if QoS is enabled. */
1509                 if (enable_qos) {
1510                         switch (ac) {
1511                         case IEEE80211_AC_BK:
1512                                 qparam.cw_max = aCWmax;
1513                                 qparam.cw_min = aCWmin;
1514                                 qparam.txop = 0;
1515                                 if (is_ocb)
1516                                         qparam.aifs = 9;
1517                                 else
1518                                         qparam.aifs = 7;
1519                                 break;
1520                         /* never happens but let's not leave undefined */
1521                         default:
1522                         case IEEE80211_AC_BE:
1523                                 qparam.cw_max = aCWmax;
1524                                 qparam.cw_min = aCWmin;
1525                                 qparam.txop = 0;
1526                                 if (is_ocb)
1527                                         qparam.aifs = 6;
1528                                 else
1529                                         qparam.aifs = 3;
1530                                 break;
1531                         case IEEE80211_AC_VI:
1532                                 qparam.cw_max = aCWmin;
1533                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1534                                 if (is_ocb)
1535                                         qparam.txop = 0;
1536                                 else if (use_11b)
1537                                         qparam.txop = 6016/32;
1538                                 else
1539                                         qparam.txop = 3008/32;
1540
1541                                 if (is_ocb)
1542                                         qparam.aifs = 3;
1543                                 else
1544                                         qparam.aifs = 2;
1545                                 break;
1546                         case IEEE80211_AC_VO:
1547                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1548                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1549                                 if (is_ocb)
1550                                         qparam.txop = 0;
1551                                 else if (use_11b)
1552                                         qparam.txop = 3264/32;
1553                                 else
1554                                         qparam.txop = 1504/32;
1555                                 qparam.aifs = 2;
1556                                 break;
1557                         }
1558                 }
1559                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1560
1561                 qparam.uapsd = false;
1562
1563                 sdata->tx_conf[ac] = qparam;
1564                 drv_conf_tx(local, sdata, ac, &qparam);
1565         }
1566
1567         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1568             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1569             sdata->vif.type != NL80211_IFTYPE_NAN) {
1570                 sdata->vif.bss_conf.qos = enable_qos;
1571                 if (bss_notify)
1572                         ieee80211_bss_info_change_notify(sdata,
1573                                                          BSS_CHANGED_QOS);
1574         }
1575 }
1576
1577 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1578                          u16 transaction, u16 auth_alg, u16 status,
1579                          const u8 *extra, size_t extra_len, const u8 *da,
1580                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1581                          u32 tx_flags)
1582 {
1583         struct ieee80211_local *local = sdata->local;
1584         struct sk_buff *skb;
1585         struct ieee80211_mgmt *mgmt;
1586         int err;
1587
1588         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1589         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1590                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1591         if (!skb)
1592                 return;
1593
1594         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1595
1596         mgmt = skb_put_zero(skb, 24 + 6);
1597         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1598                                           IEEE80211_STYPE_AUTH);
1599         memcpy(mgmt->da, da, ETH_ALEN);
1600         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1601         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1602         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1603         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1604         mgmt->u.auth.status_code = cpu_to_le16(status);
1605         if (extra)
1606                 skb_put_data(skb, extra, extra_len);
1607
1608         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1609                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1610                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1611                 WARN_ON(err);
1612         }
1613
1614         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1615                                         tx_flags;
1616         ieee80211_tx_skb(sdata, skb);
1617 }
1618
1619 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1620                                     const u8 *da, const u8 *bssid,
1621                                     u16 stype, u16 reason,
1622                                     bool send_frame, u8 *frame_buf)
1623 {
1624         struct ieee80211_local *local = sdata->local;
1625         struct sk_buff *skb;
1626         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1627
1628         /* build frame */
1629         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1630         mgmt->duration = 0; /* initialize only */
1631         mgmt->seq_ctrl = 0; /* initialize only */
1632         memcpy(mgmt->da, da, ETH_ALEN);
1633         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1634         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1635         /* u.deauth.reason_code == u.disassoc.reason_code */
1636         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1637
1638         if (send_frame) {
1639                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1640                                     IEEE80211_DEAUTH_FRAME_LEN);
1641                 if (!skb)
1642                         return;
1643
1644                 skb_reserve(skb, local->hw.extra_tx_headroom);
1645
1646                 /* copy in frame */
1647                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1648
1649                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1650                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1651                         IEEE80211_SKB_CB(skb)->flags |=
1652                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1653
1654                 ieee80211_tx_skb(sdata, skb);
1655         }
1656 }
1657
1658 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1659                                          u8 *buffer, size_t buffer_len,
1660                                          const u8 *ie, size_t ie_len,
1661                                          enum nl80211_band band,
1662                                          u32 rate_mask,
1663                                          struct cfg80211_chan_def *chandef,
1664                                          size_t *offset, u32 flags)
1665 {
1666         struct ieee80211_supported_band *sband;
1667         const struct ieee80211_sta_he_cap *he_cap;
1668         u8 *pos = buffer, *end = buffer + buffer_len;
1669         size_t noffset;
1670         int supp_rates_len, i;
1671         u8 rates[32];
1672         int num_rates;
1673         int ext_rates_len;
1674         int shift;
1675         u32 rate_flags;
1676         bool have_80mhz = false;
1677
1678         *offset = 0;
1679
1680         sband = local->hw.wiphy->bands[band];
1681         if (WARN_ON_ONCE(!sband))
1682                 return 0;
1683
1684         rate_flags = ieee80211_chandef_rate_flags(chandef);
1685         shift = ieee80211_chandef_get_shift(chandef);
1686
1687         num_rates = 0;
1688         for (i = 0; i < sband->n_bitrates; i++) {
1689                 if ((BIT(i) & rate_mask) == 0)
1690                         continue; /* skip rate */
1691                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1692                         continue;
1693
1694                 rates[num_rates++] =
1695                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1696                                           (1 << shift) * 5);
1697         }
1698
1699         supp_rates_len = min_t(int, num_rates, 8);
1700
1701         if (end - pos < 2 + supp_rates_len)
1702                 goto out_err;
1703         *pos++ = WLAN_EID_SUPP_RATES;
1704         *pos++ = supp_rates_len;
1705         memcpy(pos, rates, supp_rates_len);
1706         pos += supp_rates_len;
1707
1708         /* insert "request information" if in custom IEs */
1709         if (ie && ie_len) {
1710                 static const u8 before_extrates[] = {
1711                         WLAN_EID_SSID,
1712                         WLAN_EID_SUPP_RATES,
1713                         WLAN_EID_REQUEST,
1714                 };
1715                 noffset = ieee80211_ie_split(ie, ie_len,
1716                                              before_extrates,
1717                                              ARRAY_SIZE(before_extrates),
1718                                              *offset);
1719                 if (end - pos < noffset - *offset)
1720                         goto out_err;
1721                 memcpy(pos, ie + *offset, noffset - *offset);
1722                 pos += noffset - *offset;
1723                 *offset = noffset;
1724         }
1725
1726         ext_rates_len = num_rates - supp_rates_len;
1727         if (ext_rates_len > 0) {
1728                 if (end - pos < 2 + ext_rates_len)
1729                         goto out_err;
1730                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1731                 *pos++ = ext_rates_len;
1732                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1733                 pos += ext_rates_len;
1734         }
1735
1736         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1737                 if (end - pos < 3)
1738                         goto out_err;
1739                 *pos++ = WLAN_EID_DS_PARAMS;
1740                 *pos++ = 1;
1741                 *pos++ = ieee80211_frequency_to_channel(
1742                                 chandef->chan->center_freq);
1743         }
1744
1745         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1746                 goto done;
1747
1748         /* insert custom IEs that go before HT */
1749         if (ie && ie_len) {
1750                 static const u8 before_ht[] = {
1751                         /*
1752                          * no need to list the ones split off already
1753                          * (or generated here)
1754                          */
1755                         WLAN_EID_DS_PARAMS,
1756                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1757                 };
1758                 noffset = ieee80211_ie_split(ie, ie_len,
1759                                              before_ht, ARRAY_SIZE(before_ht),
1760                                              *offset);
1761                 if (end - pos < noffset - *offset)
1762                         goto out_err;
1763                 memcpy(pos, ie + *offset, noffset - *offset);
1764                 pos += noffset - *offset;
1765                 *offset = noffset;
1766         }
1767
1768         if (sband->ht_cap.ht_supported) {
1769                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1770                         goto out_err;
1771                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1772                                                 sband->ht_cap.cap);
1773         }
1774
1775         /* insert custom IEs that go before VHT */
1776         if (ie && ie_len) {
1777                 static const u8 before_vht[] = {
1778                         /*
1779                          * no need to list the ones split off already
1780                          * (or generated here)
1781                          */
1782                         WLAN_EID_BSS_COEX_2040,
1783                         WLAN_EID_EXT_CAPABILITY,
1784                         WLAN_EID_SSID_LIST,
1785                         WLAN_EID_CHANNEL_USAGE,
1786                         WLAN_EID_INTERWORKING,
1787                         WLAN_EID_MESH_ID,
1788                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1789                 };
1790                 noffset = ieee80211_ie_split(ie, ie_len,
1791                                              before_vht, ARRAY_SIZE(before_vht),
1792                                              *offset);
1793                 if (end - pos < noffset - *offset)
1794                         goto out_err;
1795                 memcpy(pos, ie + *offset, noffset - *offset);
1796                 pos += noffset - *offset;
1797                 *offset = noffset;
1798         }
1799
1800         /* Check if any channel in this sband supports at least 80 MHz */
1801         for (i = 0; i < sband->n_channels; i++) {
1802                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1803                                                 IEEE80211_CHAN_NO_80MHZ))
1804                         continue;
1805
1806                 have_80mhz = true;
1807                 break;
1808         }
1809
1810         if (sband->vht_cap.vht_supported && have_80mhz) {
1811                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1812                         goto out_err;
1813                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1814                                                  sband->vht_cap.cap);
1815         }
1816
1817         /* insert custom IEs that go before HE */
1818         if (ie && ie_len) {
1819                 static const u8 before_he[] = {
1820                         /*
1821                          * no need to list the ones split off before VHT
1822                          * or generated here
1823                          */
1824                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1825                         WLAN_EID_AP_CSN,
1826                         /* TODO: add 11ah/11aj/11ak elements */
1827                 };
1828                 noffset = ieee80211_ie_split(ie, ie_len,
1829                                              before_he, ARRAY_SIZE(before_he),
1830                                              *offset);
1831                 if (end - pos < noffset - *offset)
1832                         goto out_err;
1833                 memcpy(pos, ie + *offset, noffset - *offset);
1834                 pos += noffset - *offset;
1835                 *offset = noffset;
1836         }
1837
1838         he_cap = ieee80211_get_he_sta_cap(sband);
1839         if (he_cap) {
1840                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1841                 if (!pos)
1842                         goto out_err;
1843         }
1844
1845         /*
1846          * If adding more here, adjust code in main.c
1847          * that calculates local->scan_ies_len.
1848          */
1849
1850         return pos - buffer;
1851  out_err:
1852         WARN_ONCE(1, "not enough space for preq IEs\n");
1853  done:
1854         return pos - buffer;
1855 }
1856
1857 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1858                              size_t buffer_len,
1859                              struct ieee80211_scan_ies *ie_desc,
1860                              const u8 *ie, size_t ie_len,
1861                              u8 bands_used, u32 *rate_masks,
1862                              struct cfg80211_chan_def *chandef,
1863                              u32 flags)
1864 {
1865         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1866         int i;
1867
1868         memset(ie_desc, 0, sizeof(*ie_desc));
1869
1870         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1871                 if (bands_used & BIT(i)) {
1872                         pos += ieee80211_build_preq_ies_band(local,
1873                                                              buffer + pos,
1874                                                              buffer_len - pos,
1875                                                              ie, ie_len, i,
1876                                                              rate_masks[i],
1877                                                              chandef,
1878                                                              &custom_ie_offset,
1879                                                              flags);
1880                         ie_desc->ies[i] = buffer + old_pos;
1881                         ie_desc->len[i] = pos - old_pos;
1882                         old_pos = pos;
1883                 }
1884         }
1885
1886         /* add any remaining custom IEs */
1887         if (ie && ie_len) {
1888                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1889                               "not enough space for preq custom IEs\n"))
1890                         return pos;
1891                 memcpy(buffer + pos, ie + custom_ie_offset,
1892                        ie_len - custom_ie_offset);
1893                 ie_desc->common_ies = buffer + pos;
1894                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1895                 pos += ie_len - custom_ie_offset;
1896         }
1897
1898         return pos;
1899 };
1900
1901 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1902                                           const u8 *src, const u8 *dst,
1903                                           u32 ratemask,
1904                                           struct ieee80211_channel *chan,
1905                                           const u8 *ssid, size_t ssid_len,
1906                                           const u8 *ie, size_t ie_len,
1907                                           u32 flags)
1908 {
1909         struct ieee80211_local *local = sdata->local;
1910         struct cfg80211_chan_def chandef;
1911         struct sk_buff *skb;
1912         struct ieee80211_mgmt *mgmt;
1913         int ies_len;
1914         u32 rate_masks[NUM_NL80211_BANDS] = {};
1915         struct ieee80211_scan_ies dummy_ie_desc;
1916
1917         /*
1918          * Do not send DS Channel parameter for directed probe requests
1919          * in order to maximize the chance that we get a response.  Some
1920          * badly-behaved APs don't respond when this parameter is included.
1921          */
1922         chandef.width = sdata->vif.bss_conf.chandef.width;
1923         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1924                 chandef.chan = NULL;
1925         else
1926                 chandef.chan = chan;
1927
1928         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1929                                      100 + ie_len);
1930         if (!skb)
1931                 return NULL;
1932
1933         rate_masks[chan->band] = ratemask;
1934         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1935                                            skb_tailroom(skb), &dummy_ie_desc,
1936                                            ie, ie_len, BIT(chan->band),
1937                                            rate_masks, &chandef, flags);
1938         skb_put(skb, ies_len);
1939
1940         if (dst) {
1941                 mgmt = (struct ieee80211_mgmt *) skb->data;
1942                 memcpy(mgmt->da, dst, ETH_ALEN);
1943                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1944         }
1945
1946         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1947
1948         return skb;
1949 }
1950
1951 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1952                             struct ieee802_11_elems *elems,
1953                             enum nl80211_band band, u32 *basic_rates)
1954 {
1955         struct ieee80211_supported_band *sband;
1956         size_t num_rates;
1957         u32 supp_rates, rate_flags;
1958         int i, j, shift;
1959
1960         sband = sdata->local->hw.wiphy->bands[band];
1961         if (WARN_ON(!sband))
1962                 return 1;
1963
1964         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1965         shift = ieee80211_vif_get_shift(&sdata->vif);
1966
1967         num_rates = sband->n_bitrates;
1968         supp_rates = 0;
1969         for (i = 0; i < elems->supp_rates_len +
1970                      elems->ext_supp_rates_len; i++) {
1971                 u8 rate = 0;
1972                 int own_rate;
1973                 bool is_basic;
1974                 if (i < elems->supp_rates_len)
1975                         rate = elems->supp_rates[i];
1976                 else if (elems->ext_supp_rates)
1977                         rate = elems->ext_supp_rates
1978                                 [i - elems->supp_rates_len];
1979                 own_rate = 5 * (rate & 0x7f);
1980                 is_basic = !!(rate & 0x80);
1981
1982                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1983                         continue;
1984
1985                 for (j = 0; j < num_rates; j++) {
1986                         int brate;
1987                         if ((rate_flags & sband->bitrates[j].flags)
1988                             != rate_flags)
1989                                 continue;
1990
1991                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1992                                              1 << shift);
1993
1994                         if (brate == own_rate) {
1995                                 supp_rates |= BIT(j);
1996                                 if (basic_rates && is_basic)
1997                                         *basic_rates |= BIT(j);
1998                         }
1999                 }
2000         }
2001         return supp_rates;
2002 }
2003
2004 void ieee80211_stop_device(struct ieee80211_local *local)
2005 {
2006         ieee80211_led_radio(local, false);
2007         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2008
2009         cancel_work_sync(&local->reconfig_filter);
2010
2011         flush_workqueue(local->workqueue);
2012         drv_stop(local);
2013 }
2014
2015 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2016                                            bool aborted)
2017 {
2018         /* It's possible that we don't handle the scan completion in
2019          * time during suspend, so if it's still marked as completed
2020          * here, queue the work and flush it to clean things up.
2021          * Instead of calling the worker function directly here, we
2022          * really queue it to avoid potential races with other flows
2023          * scheduling the same work.
2024          */
2025         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2026                 /* If coming from reconfiguration failure, abort the scan so
2027                  * we don't attempt to continue a partial HW scan - which is
2028                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2029                  * completed scan, and a 5 GHz portion is still pending.
2030                  */
2031                 if (aborted)
2032                         set_bit(SCAN_ABORTED, &local->scanning);
2033                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2034                 flush_delayed_work(&local->scan_work);
2035         }
2036 }
2037
2038 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2039 {
2040         struct ieee80211_sub_if_data *sdata;
2041         struct ieee80211_chanctx *ctx;
2042
2043         /*
2044          * We get here if during resume the device can't be restarted properly.
2045          * We might also get here if this happens during HW reset, which is a
2046          * slightly different situation and we need to drop all connections in
2047          * the latter case.
2048          *
2049          * Ask cfg80211 to turn off all interfaces, this will result in more
2050          * warnings but at least we'll then get into a clean stopped state.
2051          */
2052
2053         local->resuming = false;
2054         local->suspended = false;
2055         local->in_reconfig = false;
2056
2057         ieee80211_flush_completed_scan(local, true);
2058
2059         /* scheduled scan clearly can't be running any more, but tell
2060          * cfg80211 and clear local state
2061          */
2062         ieee80211_sched_scan_end(local);
2063
2064         list_for_each_entry(sdata, &local->interfaces, list)
2065                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2066
2067         /* Mark channel contexts as not being in the driver any more to avoid
2068          * removing them from the driver during the shutdown process...
2069          */
2070         mutex_lock(&local->chanctx_mtx);
2071         list_for_each_entry(ctx, &local->chanctx_list, list)
2072                 ctx->driver_present = false;
2073         mutex_unlock(&local->chanctx_mtx);
2074
2075         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2076 }
2077
2078 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2079                                      struct ieee80211_sub_if_data *sdata)
2080 {
2081         struct ieee80211_chanctx_conf *conf;
2082         struct ieee80211_chanctx *ctx;
2083
2084         if (!local->use_chanctx)
2085                 return;
2086
2087         mutex_lock(&local->chanctx_mtx);
2088         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2089                                          lockdep_is_held(&local->chanctx_mtx));
2090         if (conf) {
2091                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2092                 drv_assign_vif_chanctx(local, sdata, ctx);
2093         }
2094         mutex_unlock(&local->chanctx_mtx);
2095 }
2096
2097 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2098 {
2099         struct ieee80211_local *local = sdata->local;
2100         struct sta_info *sta;
2101
2102         /* add STAs back */
2103         mutex_lock(&local->sta_mtx);
2104         list_for_each_entry(sta, &local->sta_list, list) {
2105                 enum ieee80211_sta_state state;
2106
2107                 if (!sta->uploaded || sta->sdata != sdata)
2108                         continue;
2109
2110                 for (state = IEEE80211_STA_NOTEXIST;
2111                      state < sta->sta_state; state++)
2112                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2113                                               state + 1));
2114         }
2115         mutex_unlock(&local->sta_mtx);
2116 }
2117
2118 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2119 {
2120         struct cfg80211_nan_func *func, **funcs;
2121         int res, id, i = 0;
2122
2123         res = drv_start_nan(sdata->local, sdata,
2124                             &sdata->u.nan.conf);
2125         if (WARN_ON(res))
2126                 return res;
2127
2128         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2129                         sizeof(*funcs),
2130                         GFP_KERNEL);
2131         if (!funcs)
2132                 return -ENOMEM;
2133
2134         /* Add all the functions:
2135          * This is a little bit ugly. We need to call a potentially sleeping
2136          * callback for each NAN function, so we can't hold the spinlock.
2137          */
2138         spin_lock_bh(&sdata->u.nan.func_lock);
2139
2140         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2141                 funcs[i++] = func;
2142
2143         spin_unlock_bh(&sdata->u.nan.func_lock);
2144
2145         for (i = 0; funcs[i]; i++) {
2146                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2147                 if (WARN_ON(res))
2148                         ieee80211_nan_func_terminated(&sdata->vif,
2149                                                       funcs[i]->instance_id,
2150                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2151                                                       GFP_KERNEL);
2152         }
2153
2154         kfree(funcs);
2155
2156         return 0;
2157 }
2158
2159 int ieee80211_reconfig(struct ieee80211_local *local)
2160 {
2161         struct ieee80211_hw *hw = &local->hw;
2162         struct ieee80211_sub_if_data *sdata;
2163         struct ieee80211_chanctx *ctx;
2164         struct sta_info *sta;
2165         int res, i;
2166         bool reconfig_due_to_wowlan = false;
2167         struct ieee80211_sub_if_data *sched_scan_sdata;
2168         struct cfg80211_sched_scan_request *sched_scan_req;
2169         bool sched_scan_stopped = false;
2170         bool suspended = local->suspended;
2171
2172         /* nothing to do if HW shouldn't run */
2173         if (!local->open_count)
2174                 goto wake_up;
2175
2176 #ifdef CONFIG_PM
2177         if (suspended)
2178                 local->resuming = true;
2179
2180         if (local->wowlan) {
2181                 /*
2182                  * In the wowlan case, both mac80211 and the device
2183                  * are functional when the resume op is called, so
2184                  * clear local->suspended so the device could operate
2185                  * normally (e.g. pass rx frames).
2186                  */
2187                 local->suspended = false;
2188                 res = drv_resume(local);
2189                 local->wowlan = false;
2190                 if (res < 0) {
2191                         local->resuming = false;
2192                         return res;
2193                 }
2194                 if (res == 0)
2195                         goto wake_up;
2196                 WARN_ON(res > 1);
2197                 /*
2198                  * res is 1, which means the driver requested
2199                  * to go through a regular reset on wakeup.
2200                  * restore local->suspended in this case.
2201                  */
2202                 reconfig_due_to_wowlan = true;
2203                 local->suspended = true;
2204         }
2205 #endif
2206
2207         /*
2208          * In case of hw_restart during suspend (without wowlan),
2209          * cancel restart work, as we are reconfiguring the device
2210          * anyway.
2211          * Note that restart_work is scheduled on a frozen workqueue,
2212          * so we can't deadlock in this case.
2213          */
2214         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2215                 cancel_work_sync(&local->restart_work);
2216
2217         local->started = false;
2218
2219         /*
2220          * Upon resume hardware can sometimes be goofy due to
2221          * various platform / driver / bus issues, so restarting
2222          * the device may at times not work immediately. Propagate
2223          * the error.
2224          */
2225         res = drv_start(local);
2226         if (res) {
2227                 if (suspended)
2228                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2229                 else
2230                         WARN(1, "Hardware became unavailable during restart.\n");
2231                 ieee80211_handle_reconfig_failure(local);
2232                 return res;
2233         }
2234
2235         /* setup fragmentation threshold */
2236         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2237
2238         /* setup RTS threshold */
2239         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2240
2241         /* reset coverage class */
2242         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2243
2244         ieee80211_led_radio(local, true);
2245         ieee80211_mod_tpt_led_trig(local,
2246                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2247
2248         /* add interfaces */
2249         sdata = rtnl_dereference(local->monitor_sdata);
2250         if (sdata) {
2251                 /* in HW restart it exists already */
2252                 WARN_ON(local->resuming);
2253                 res = drv_add_interface(local, sdata);
2254                 if (WARN_ON(res)) {
2255                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2256                         synchronize_net();
2257                         kfree(sdata);
2258                 }
2259         }
2260
2261         list_for_each_entry(sdata, &local->interfaces, list) {
2262                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2263                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2264                     ieee80211_sdata_running(sdata)) {
2265                         res = drv_add_interface(local, sdata);
2266                         if (WARN_ON(res))
2267                                 break;
2268                 }
2269         }
2270
2271         /* If adding any of the interfaces failed above, roll back and
2272          * report failure.
2273          */
2274         if (res) {
2275                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2276                                                      list)
2277                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2278                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2279                             ieee80211_sdata_running(sdata))
2280                                 drv_remove_interface(local, sdata);
2281                 ieee80211_handle_reconfig_failure(local);
2282                 return res;
2283         }
2284
2285         /* add channel contexts */
2286         if (local->use_chanctx) {
2287                 mutex_lock(&local->chanctx_mtx);
2288                 list_for_each_entry(ctx, &local->chanctx_list, list)
2289                         if (ctx->replace_state !=
2290                             IEEE80211_CHANCTX_REPLACES_OTHER)
2291                                 WARN_ON(drv_add_chanctx(local, ctx));
2292                 mutex_unlock(&local->chanctx_mtx);
2293
2294                 sdata = rtnl_dereference(local->monitor_sdata);
2295                 if (sdata && ieee80211_sdata_running(sdata))
2296                         ieee80211_assign_chanctx(local, sdata);
2297         }
2298
2299         /* reconfigure hardware */
2300         ieee80211_hw_config(local, ~0);
2301
2302         ieee80211_configure_filter(local);
2303
2304         /* Finally also reconfigure all the BSS information */
2305         list_for_each_entry(sdata, &local->interfaces, list) {
2306                 u32 changed;
2307
2308                 if (!ieee80211_sdata_running(sdata))
2309                         continue;
2310
2311                 ieee80211_assign_chanctx(local, sdata);
2312
2313                 switch (sdata->vif.type) {
2314                 case NL80211_IFTYPE_AP_VLAN:
2315                 case NL80211_IFTYPE_MONITOR:
2316                         break;
2317                 case NL80211_IFTYPE_ADHOC:
2318                         if (sdata->vif.bss_conf.ibss_joined)
2319                                 WARN_ON(drv_join_ibss(local, sdata));
2320                         /* fall through */
2321                 default:
2322                         ieee80211_reconfig_stations(sdata);
2323                         /* fall through */
2324                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2325                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2326                                 drv_conf_tx(local, sdata, i,
2327                                             &sdata->tx_conf[i]);
2328                         break;
2329                 }
2330
2331                 /* common change flags for all interface types */
2332                 changed = BSS_CHANGED_ERP_CTS_PROT |
2333                           BSS_CHANGED_ERP_PREAMBLE |
2334                           BSS_CHANGED_ERP_SLOT |
2335                           BSS_CHANGED_HT |
2336                           BSS_CHANGED_BASIC_RATES |
2337                           BSS_CHANGED_BEACON_INT |
2338                           BSS_CHANGED_BSSID |
2339                           BSS_CHANGED_CQM |
2340                           BSS_CHANGED_QOS |
2341                           BSS_CHANGED_IDLE |
2342                           BSS_CHANGED_TXPOWER |
2343                           BSS_CHANGED_MCAST_RATE;
2344
2345                 if (sdata->vif.mu_mimo_owner)
2346                         changed |= BSS_CHANGED_MU_GROUPS;
2347
2348                 switch (sdata->vif.type) {
2349                 case NL80211_IFTYPE_STATION:
2350                         changed |= BSS_CHANGED_ASSOC |
2351                                    BSS_CHANGED_ARP_FILTER |
2352                                    BSS_CHANGED_PS;
2353
2354                         /* Re-send beacon info report to the driver */
2355                         if (sdata->u.mgd.have_beacon)
2356                                 changed |= BSS_CHANGED_BEACON_INFO;
2357
2358                         if (sdata->vif.bss_conf.max_idle_period ||
2359                             sdata->vif.bss_conf.protected_keep_alive)
2360                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2361
2362                         sdata_lock(sdata);
2363                         ieee80211_bss_info_change_notify(sdata, changed);
2364                         sdata_unlock(sdata);
2365                         break;
2366                 case NL80211_IFTYPE_OCB:
2367                         changed |= BSS_CHANGED_OCB;
2368                         ieee80211_bss_info_change_notify(sdata, changed);
2369                         break;
2370                 case NL80211_IFTYPE_ADHOC:
2371                         changed |= BSS_CHANGED_IBSS;
2372                         /* fall through */
2373                 case NL80211_IFTYPE_AP:
2374                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2375
2376                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2377                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2378                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2379                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2380
2381                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2382                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2383
2384                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2385                                         drv_start_ap(local, sdata);
2386                         }
2387
2388                         /* fall through */
2389                 case NL80211_IFTYPE_MESH_POINT:
2390                         if (sdata->vif.bss_conf.enable_beacon) {
2391                                 changed |= BSS_CHANGED_BEACON |
2392                                            BSS_CHANGED_BEACON_ENABLED;
2393                                 ieee80211_bss_info_change_notify(sdata, changed);
2394                         }
2395                         break;
2396                 case NL80211_IFTYPE_NAN:
2397                         res = ieee80211_reconfig_nan(sdata);
2398                         if (res < 0) {
2399                                 ieee80211_handle_reconfig_failure(local);
2400                                 return res;
2401                         }
2402                         break;
2403                 case NL80211_IFTYPE_WDS:
2404                 case NL80211_IFTYPE_AP_VLAN:
2405                 case NL80211_IFTYPE_MONITOR:
2406                 case NL80211_IFTYPE_P2P_DEVICE:
2407                         /* nothing to do */
2408                         break;
2409                 case NL80211_IFTYPE_UNSPECIFIED:
2410                 case NUM_NL80211_IFTYPES:
2411                 case NL80211_IFTYPE_P2P_CLIENT:
2412                 case NL80211_IFTYPE_P2P_GO:
2413                         WARN_ON(1);
2414                         break;
2415                 }
2416         }
2417
2418         ieee80211_recalc_ps(local);
2419
2420         /*
2421          * The sta might be in psm against the ap (e.g. because
2422          * this was the state before a hw restart), so we
2423          * explicitly send a null packet in order to make sure
2424          * it'll sync against the ap (and get out of psm).
2425          */
2426         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2427                 list_for_each_entry(sdata, &local->interfaces, list) {
2428                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2429                                 continue;
2430                         if (!sdata->u.mgd.associated)
2431                                 continue;
2432
2433                         ieee80211_send_nullfunc(local, sdata, false);
2434                 }
2435         }
2436
2437         /* APs are now beaconing, add back stations */
2438         mutex_lock(&local->sta_mtx);
2439         list_for_each_entry(sta, &local->sta_list, list) {
2440                 enum ieee80211_sta_state state;
2441
2442                 if (!sta->uploaded)
2443                         continue;
2444
2445                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2446                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2447                         continue;
2448
2449                 for (state = IEEE80211_STA_NOTEXIST;
2450                      state < sta->sta_state; state++)
2451                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2452                                               state + 1));
2453         }
2454         mutex_unlock(&local->sta_mtx);
2455
2456         /* add back keys */
2457         list_for_each_entry(sdata, &local->interfaces, list)
2458                 ieee80211_reenable_keys(sdata);
2459
2460         /* Reconfigure sched scan if it was interrupted by FW restart */
2461         mutex_lock(&local->mtx);
2462         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2463                                                 lockdep_is_held(&local->mtx));
2464         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2465                                                 lockdep_is_held(&local->mtx));
2466         if (sched_scan_sdata && sched_scan_req)
2467                 /*
2468                  * Sched scan stopped, but we don't want to report it. Instead,
2469                  * we're trying to reschedule. However, if more than one scan
2470                  * plan was set, we cannot reschedule since we don't know which
2471                  * scan plan was currently running (and some scan plans may have
2472                  * already finished).
2473                  */
2474                 if (sched_scan_req->n_scan_plans > 1 ||
2475                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2476                                                          sched_scan_req)) {
2477                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2478                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2479                         sched_scan_stopped = true;
2480                 }
2481         mutex_unlock(&local->mtx);
2482
2483         if (sched_scan_stopped)
2484                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2485
2486  wake_up:
2487
2488         if (local->monitors == local->open_count && local->monitors > 0)
2489                 ieee80211_add_virtual_monitor(local);
2490
2491         /*
2492          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2493          * sessions can be established after a resume.
2494          *
2495          * Also tear down aggregation sessions since reconfiguring
2496          * them in a hardware restart scenario is not easily done
2497          * right now, and the hardware will have lost information
2498          * about the sessions, but we and the AP still think they
2499          * are active. This is really a workaround though.
2500          */
2501         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2502                 mutex_lock(&local->sta_mtx);
2503
2504                 list_for_each_entry(sta, &local->sta_list, list) {
2505                         if (!local->resuming)
2506                                 ieee80211_sta_tear_down_BA_sessions(
2507                                                 sta, AGG_STOP_LOCAL_REQUEST);
2508                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2509                 }
2510
2511                 mutex_unlock(&local->sta_mtx);
2512         }
2513
2514         if (local->in_reconfig) {
2515                 local->in_reconfig = false;
2516                 barrier();
2517
2518                 /* Restart deferred ROCs */
2519                 mutex_lock(&local->mtx);
2520                 ieee80211_start_next_roc(local);
2521                 mutex_unlock(&local->mtx);
2522
2523                 /* Requeue all works */
2524                 list_for_each_entry(sdata, &local->interfaces, list)
2525                         ieee80211_queue_work(&local->hw, &sdata->work);
2526         }
2527
2528         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2529                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2530                                         false);
2531
2532         /*
2533          * If this is for hw restart things are still running.
2534          * We may want to change that later, however.
2535          */
2536         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2537                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2538
2539         if (!suspended)
2540                 return 0;
2541
2542 #ifdef CONFIG_PM
2543         /* first set suspended false, then resuming */
2544         local->suspended = false;
2545         mb();
2546         local->resuming = false;
2547
2548         ieee80211_flush_completed_scan(local, false);
2549
2550         if (local->open_count && !reconfig_due_to_wowlan)
2551                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2552
2553         list_for_each_entry(sdata, &local->interfaces, list) {
2554                 if (!ieee80211_sdata_running(sdata))
2555                         continue;
2556                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2557                         ieee80211_sta_restart(sdata);
2558         }
2559
2560         mod_timer(&local->sta_cleanup, jiffies + 1);
2561 #else
2562         WARN_ON(1);
2563 #endif
2564
2565         return 0;
2566 }
2567
2568 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2569 {
2570         struct ieee80211_sub_if_data *sdata;
2571         struct ieee80211_local *local;
2572         struct ieee80211_key *key;
2573
2574         if (WARN_ON(!vif))
2575                 return;
2576
2577         sdata = vif_to_sdata(vif);
2578         local = sdata->local;
2579
2580         if (WARN_ON(!local->resuming))
2581                 return;
2582
2583         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2584                 return;
2585
2586         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2587
2588         mutex_lock(&local->key_mtx);
2589         list_for_each_entry(key, &sdata->key_list, list)
2590                 key->flags |= KEY_FLAG_TAINTED;
2591         mutex_unlock(&local->key_mtx);
2592 }
2593 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2594
2595 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2596 {
2597         struct ieee80211_local *local = sdata->local;
2598         struct ieee80211_chanctx_conf *chanctx_conf;
2599         struct ieee80211_chanctx *chanctx;
2600
2601         mutex_lock(&local->chanctx_mtx);
2602
2603         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2604                                         lockdep_is_held(&local->chanctx_mtx));
2605
2606         /*
2607          * This function can be called from a work, thus it may be possible
2608          * that the chanctx_conf is removed (due to a disconnection, for
2609          * example).
2610          * So nothing should be done in such case.
2611          */
2612         if (!chanctx_conf)
2613                 goto unlock;
2614
2615         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2616         ieee80211_recalc_smps_chanctx(local, chanctx);
2617  unlock:
2618         mutex_unlock(&local->chanctx_mtx);
2619 }
2620
2621 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2622 {
2623         struct ieee80211_local *local = sdata->local;
2624         struct ieee80211_chanctx_conf *chanctx_conf;
2625         struct ieee80211_chanctx *chanctx;
2626
2627         mutex_lock(&local->chanctx_mtx);
2628
2629         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2630                                         lockdep_is_held(&local->chanctx_mtx));
2631
2632         if (WARN_ON_ONCE(!chanctx_conf))
2633                 goto unlock;
2634
2635         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2636         ieee80211_recalc_chanctx_min_def(local, chanctx);
2637  unlock:
2638         mutex_unlock(&local->chanctx_mtx);
2639 }
2640
2641 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2642 {
2643         size_t pos = offset;
2644
2645         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2646                 pos += 2 + ies[pos + 1];
2647
2648         return pos;
2649 }
2650
2651 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2652                                             int rssi_min_thold,
2653                                             int rssi_max_thold)
2654 {
2655         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2656
2657         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2658                 return;
2659
2660         /*
2661          * Scale up threshold values before storing it, as the RSSI averaging
2662          * algorithm uses a scaled up value as well. Change this scaling
2663          * factor if the RSSI averaging algorithm changes.
2664          */
2665         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2666         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2667 }
2668
2669 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2670                                     int rssi_min_thold,
2671                                     int rssi_max_thold)
2672 {
2673         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2674
2675         WARN_ON(rssi_min_thold == rssi_max_thold ||
2676                 rssi_min_thold > rssi_max_thold);
2677
2678         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2679                                        rssi_max_thold);
2680 }
2681 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2682
2683 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2684 {
2685         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2686
2687         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2688 }
2689 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2690
2691 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2692                               u16 cap)
2693 {
2694         __le16 tmp;
2695
2696         *pos++ = WLAN_EID_HT_CAPABILITY;
2697         *pos++ = sizeof(struct ieee80211_ht_cap);
2698         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2699
2700         /* capability flags */
2701         tmp = cpu_to_le16(cap);
2702         memcpy(pos, &tmp, sizeof(u16));
2703         pos += sizeof(u16);
2704
2705         /* AMPDU parameters */
2706         *pos++ = ht_cap->ampdu_factor |
2707                  (ht_cap->ampdu_density <<
2708                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2709
2710         /* MCS set */
2711         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2712         pos += sizeof(ht_cap->mcs);
2713
2714         /* extended capabilities */
2715         pos += sizeof(__le16);
2716
2717         /* BF capabilities */
2718         pos += sizeof(__le32);
2719
2720         /* antenna selection */
2721         pos += sizeof(u8);
2722
2723         return pos;
2724 }
2725
2726 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2727                                u32 cap)
2728 {
2729         __le32 tmp;
2730
2731         *pos++ = WLAN_EID_VHT_CAPABILITY;
2732         *pos++ = sizeof(struct ieee80211_vht_cap);
2733         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2734
2735         /* capability flags */
2736         tmp = cpu_to_le32(cap);
2737         memcpy(pos, &tmp, sizeof(u32));
2738         pos += sizeof(u32);
2739
2740         /* VHT MCS set */
2741         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2742         pos += sizeof(vht_cap->vht_mcs);
2743
2744         return pos;
2745 }
2746
2747 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2748 {
2749         const struct ieee80211_sta_he_cap *he_cap;
2750         struct ieee80211_supported_band *sband;
2751         u8 n;
2752
2753         sband = ieee80211_get_sband(sdata);
2754         if (!sband)
2755                 return 0;
2756
2757         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2758         if (!he_cap)
2759                 return 0;
2760
2761         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2762         return 2 + 1 +
2763                sizeof(he_cap->he_cap_elem) + n +
2764                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2765                                      he_cap->he_cap_elem.phy_cap_info);
2766 }
2767
2768 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2769                               const struct ieee80211_sta_he_cap *he_cap,
2770                               u8 *end)
2771 {
2772         u8 n;
2773         u8 ie_len;
2774         u8 *orig_pos = pos;
2775
2776         /* Make sure we have place for the IE */
2777         /*
2778          * TODO: the 1 added is because this temporarily is under the EXTENSION
2779          * IE. Get rid of it when it moves.
2780          */
2781         if (!he_cap)
2782                 return orig_pos;
2783
2784         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2785         ie_len = 2 + 1 +
2786                  sizeof(he_cap->he_cap_elem) + n +
2787                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2788                                        he_cap->he_cap_elem.phy_cap_info);
2789
2790         if ((end - pos) < ie_len)
2791                 return orig_pos;
2792
2793         *pos++ = WLAN_EID_EXTENSION;
2794         pos++; /* We'll set the size later below */
2795         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2796
2797         /* Fixed data */
2798         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2799         pos += sizeof(he_cap->he_cap_elem);
2800
2801         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2802         pos += n;
2803
2804         /* Check if PPE Threshold should be present */
2805         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2806              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2807                 goto end;
2808
2809         /*
2810          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2811          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2812          */
2813         n = hweight8(he_cap->ppe_thres[0] &
2814                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2815         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2816                    IEEE80211_PPE_THRES_NSS_POS));
2817
2818         /*
2819          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2820          * total size.
2821          */
2822         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2823         n = DIV_ROUND_UP(n, 8);
2824
2825         /* Copy PPE Thresholds */
2826         memcpy(pos, &he_cap->ppe_thres, n);
2827         pos += n;
2828
2829 end:
2830         orig_pos[1] = (pos - orig_pos) - 2;
2831         return pos;
2832 }
2833
2834 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2835                                const struct cfg80211_chan_def *chandef,
2836                                u16 prot_mode, bool rifs_mode)
2837 {
2838         struct ieee80211_ht_operation *ht_oper;
2839         /* Build HT Information */
2840         *pos++ = WLAN_EID_HT_OPERATION;
2841         *pos++ = sizeof(struct ieee80211_ht_operation);
2842         ht_oper = (struct ieee80211_ht_operation *)pos;
2843         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2844                                         chandef->chan->center_freq);
2845         switch (chandef->width) {
2846         case NL80211_CHAN_WIDTH_160:
2847         case NL80211_CHAN_WIDTH_80P80:
2848         case NL80211_CHAN_WIDTH_80:
2849         case NL80211_CHAN_WIDTH_40:
2850                 if (chandef->center_freq1 > chandef->chan->center_freq)
2851                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2852                 else
2853                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2854                 break;
2855         default:
2856                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2857                 break;
2858         }
2859         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2860             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2861             chandef->width != NL80211_CHAN_WIDTH_20)
2862                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2863
2864         if (rifs_mode)
2865                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2866
2867         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2868         ht_oper->stbc_param = 0x0000;
2869
2870         /* It seems that Basic MCS set and Supported MCS set
2871            are identical for the first 10 bytes */
2872         memset(&ht_oper->basic_set, 0, 16);
2873         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2874
2875         return pos + sizeof(struct ieee80211_ht_operation);
2876 }
2877
2878 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2879                                    const struct cfg80211_chan_def *chandef)
2880 {
2881         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2882         *pos++ = 3;                                     /* IE length */
2883         /* New channel width */
2884         switch (chandef->width) {
2885         case NL80211_CHAN_WIDTH_80:
2886                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2887                 break;
2888         case NL80211_CHAN_WIDTH_160:
2889                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2890                 break;
2891         case NL80211_CHAN_WIDTH_80P80:
2892                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2893                 break;
2894         default:
2895                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2896         }
2897
2898         /* new center frequency segment 0 */
2899         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2900         /* new center frequency segment 1 */
2901         if (chandef->center_freq2)
2902                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2903         else
2904                 *pos++ = 0;
2905 }
2906
2907 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2908                                 const struct cfg80211_chan_def *chandef)
2909 {
2910         struct ieee80211_vht_operation *vht_oper;
2911
2912         *pos++ = WLAN_EID_VHT_OPERATION;
2913         *pos++ = sizeof(struct ieee80211_vht_operation);
2914         vht_oper = (struct ieee80211_vht_operation *)pos;
2915         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2916                                                         chandef->center_freq1);
2917         if (chandef->center_freq2)
2918                 vht_oper->center_freq_seg1_idx =
2919                         ieee80211_frequency_to_channel(chandef->center_freq2);
2920         else
2921                 vht_oper->center_freq_seg1_idx = 0x00;
2922
2923         switch (chandef->width) {
2924         case NL80211_CHAN_WIDTH_160:
2925                 /*
2926                  * Convert 160 MHz channel width to new style as interop
2927                  * workaround.
2928                  */
2929                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2930                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2931                 if (chandef->chan->center_freq < chandef->center_freq1)
2932                         vht_oper->center_freq_seg0_idx -= 8;
2933                 else
2934                         vht_oper->center_freq_seg0_idx += 8;
2935                 break;
2936         case NL80211_CHAN_WIDTH_80P80:
2937                 /*
2938                  * Convert 80+80 MHz channel width to new style as interop
2939                  * workaround.
2940                  */
2941                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2942                 break;
2943         case NL80211_CHAN_WIDTH_80:
2944                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2945                 break;
2946         default:
2947                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2948                 break;
2949         }
2950
2951         /* don't require special VHT peer rates */
2952         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2953
2954         return pos + sizeof(struct ieee80211_vht_operation);
2955 }
2956
2957 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2958 {
2959         struct ieee80211_he_operation *he_oper;
2960         u32 he_oper_params;
2961
2962         *pos++ = WLAN_EID_EXTENSION;
2963         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2964         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2965
2966         he_oper_params = 0;
2967         he_oper_params |= u32_encode_bits(1023, /* disabled */
2968                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2969         he_oper_params |= u32_encode_bits(1,
2970                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2971         he_oper_params |= u32_encode_bits(1,
2972                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2973
2974         he_oper = (struct ieee80211_he_operation *)pos;
2975         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2976
2977         /* don't require special HE peer rates */
2978         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2979
2980         /* TODO add VHT operational and 6GHz operational subelement? */
2981
2982         return pos + sizeof(struct ieee80211_vht_operation);
2983 }
2984
2985 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2986                                struct cfg80211_chan_def *chandef)
2987 {
2988         enum nl80211_channel_type channel_type;
2989
2990         if (!ht_oper)
2991                 return false;
2992
2993         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2994         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2995                 channel_type = NL80211_CHAN_HT20;
2996                 break;
2997         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2998                 channel_type = NL80211_CHAN_HT40PLUS;
2999                 break;
3000         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3001                 channel_type = NL80211_CHAN_HT40MINUS;
3002                 break;
3003         default:
3004                 channel_type = NL80211_CHAN_NO_HT;
3005                 return false;
3006         }
3007
3008         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3009         return true;
3010 }
3011
3012 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3013                                 const struct ieee80211_vht_operation *oper,
3014                                 const struct ieee80211_ht_operation *htop,
3015                                 struct cfg80211_chan_def *chandef)
3016 {
3017         struct cfg80211_chan_def new = *chandef;
3018         int cf0, cf1;
3019         int ccfs0, ccfs1, ccfs2;
3020         int ccf0, ccf1;
3021         u32 vht_cap;
3022         bool support_80_80 = false;
3023         bool support_160 = false;
3024
3025         if (!oper || !htop)
3026                 return false;
3027
3028         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3029         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3030                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3031         support_80_80 = ((vht_cap &
3032                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3033                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3034                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3035                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3036                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3037         ccfs0 = oper->center_freq_seg0_idx;
3038         ccfs1 = oper->center_freq_seg1_idx;
3039         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3040                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3041                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3042
3043         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3044         ccf0 = ccfs0;
3045         ccf1 = ccfs1;
3046         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3047                 ccf1 = ccfs2;
3048
3049         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3050         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3051
3052         switch (oper->chan_width) {
3053         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3054                 /* just use HT information directly */
3055                 break;
3056         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3057                 new.width = NL80211_CHAN_WIDTH_80;
3058                 new.center_freq1 = cf0;
3059                 /* If needed, adjust based on the newer interop workaround. */
3060                 if (ccf1) {
3061                         unsigned int diff;
3062
3063                         diff = abs(ccf1 - ccf0);
3064                         if ((diff == 8) && support_160) {
3065                                 new.width = NL80211_CHAN_WIDTH_160;
3066                                 new.center_freq1 = cf1;
3067                         } else if ((diff > 8) && support_80_80) {
3068                                 new.width = NL80211_CHAN_WIDTH_80P80;
3069                                 new.center_freq2 = cf1;
3070                         }
3071                 }
3072                 break;
3073         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3074                 /* deprecated encoding */
3075                 new.width = NL80211_CHAN_WIDTH_160;
3076                 new.center_freq1 = cf0;
3077                 break;
3078         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3079                 /* deprecated encoding */
3080                 new.width = NL80211_CHAN_WIDTH_80P80;
3081                 new.center_freq1 = cf0;
3082                 new.center_freq2 = cf1;
3083                 break;
3084         default:
3085                 return false;
3086         }
3087
3088         if (!cfg80211_chandef_valid(&new))
3089                 return false;
3090
3091         *chandef = new;
3092         return true;
3093 }
3094
3095 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3096                              const struct ieee80211_supported_band *sband,
3097                              const u8 *srates, int srates_len, u32 *rates)
3098 {
3099         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3100         int shift = ieee80211_chandef_get_shift(chandef);
3101         struct ieee80211_rate *br;
3102         int brate, rate, i, j, count = 0;
3103
3104         *rates = 0;
3105
3106         for (i = 0; i < srates_len; i++) {
3107                 rate = srates[i] & 0x7f;
3108
3109                 for (j = 0; j < sband->n_bitrates; j++) {
3110                         br = &sband->bitrates[j];
3111                         if ((rate_flags & br->flags) != rate_flags)
3112                                 continue;
3113
3114                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3115                         if (brate == rate) {
3116                                 *rates |= BIT(j);
3117                                 count++;
3118                                 break;
3119                         }
3120                 }
3121         }
3122         return count;
3123 }
3124
3125 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3126                             struct sk_buff *skb, bool need_basic,
3127                             enum nl80211_band band)
3128 {
3129         struct ieee80211_local *local = sdata->local;
3130         struct ieee80211_supported_band *sband;
3131         int rate, shift;
3132         u8 i, rates, *pos;
3133         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3134         u32 rate_flags;
3135
3136         shift = ieee80211_vif_get_shift(&sdata->vif);
3137         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3138         sband = local->hw.wiphy->bands[band];
3139         rates = 0;
3140         for (i = 0; i < sband->n_bitrates; i++) {
3141                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3142                         continue;
3143                 rates++;
3144         }
3145         if (rates > 8)
3146                 rates = 8;
3147
3148         if (skb_tailroom(skb) < rates + 2)
3149                 return -ENOMEM;
3150
3151         pos = skb_put(skb, rates + 2);
3152         *pos++ = WLAN_EID_SUPP_RATES;
3153         *pos++ = rates;
3154         for (i = 0; i < rates; i++) {
3155                 u8 basic = 0;
3156                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3157                         continue;
3158
3159                 if (need_basic && basic_rates & BIT(i))
3160                         basic = 0x80;
3161                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3162                                     5 * (1 << shift));
3163                 *pos++ = basic | (u8) rate;
3164         }
3165
3166         return 0;
3167 }
3168
3169 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3170                                 struct sk_buff *skb, bool need_basic,
3171                                 enum nl80211_band band)
3172 {
3173         struct ieee80211_local *local = sdata->local;
3174         struct ieee80211_supported_band *sband;
3175         int rate, shift;
3176         u8 i, exrates, *pos;
3177         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3178         u32 rate_flags;
3179
3180         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3181         shift = ieee80211_vif_get_shift(&sdata->vif);
3182
3183         sband = local->hw.wiphy->bands[band];
3184         exrates = 0;
3185         for (i = 0; i < sband->n_bitrates; i++) {
3186                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3187                         continue;
3188                 exrates++;
3189         }
3190
3191         if (exrates > 8)
3192                 exrates -= 8;
3193         else
3194                 exrates = 0;
3195
3196         if (skb_tailroom(skb) < exrates + 2)
3197                 return -ENOMEM;
3198
3199         if (exrates) {
3200                 pos = skb_put(skb, exrates + 2);
3201                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3202                 *pos++ = exrates;
3203                 for (i = 8; i < sband->n_bitrates; i++) {
3204                         u8 basic = 0;
3205                         if ((rate_flags & sband->bitrates[i].flags)
3206                             != rate_flags)
3207                                 continue;
3208                         if (need_basic && basic_rates & BIT(i))
3209                                 basic = 0x80;
3210                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3211                                             5 * (1 << shift));
3212                         *pos++ = basic | (u8) rate;
3213                 }
3214         }
3215         return 0;
3216 }
3217
3218 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3219 {
3220         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3221         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3222
3223         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3224                 /* non-managed type inferfaces */
3225                 return 0;
3226         }
3227         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3228 }
3229 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3230
3231 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3232 {
3233         if (!mcs)
3234                 return 1;
3235
3236         /* TODO: consider rx_highest */
3237
3238         if (mcs->rx_mask[3])
3239                 return 4;
3240         if (mcs->rx_mask[2])
3241                 return 3;
3242         if (mcs->rx_mask[1])
3243                 return 2;
3244         return 1;
3245 }
3246
3247 /**
3248  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3249  * @local: mac80211 hw info struct
3250  * @status: RX status
3251  * @mpdu_len: total MPDU length (including FCS)
3252  * @mpdu_offset: offset into MPDU to calculate timestamp at
3253  *
3254  * This function calculates the RX timestamp at the given MPDU offset, taking
3255  * into account what the RX timestamp was. An offset of 0 will just normalize
3256  * the timestamp to TSF at beginning of MPDU reception.
3257  */
3258 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3259                                      struct ieee80211_rx_status *status,
3260                                      unsigned int mpdu_len,
3261                                      unsigned int mpdu_offset)
3262 {
3263         u64 ts = status->mactime;
3264         struct rate_info ri;
3265         u16 rate;
3266
3267         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3268                 return 0;
3269
3270         memset(&ri, 0, sizeof(ri));
3271
3272         ri.bw = status->bw;
3273
3274         /* Fill cfg80211 rate info */
3275         switch (status->encoding) {
3276         case RX_ENC_HT:
3277                 ri.mcs = status->rate_idx;
3278                 ri.flags |= RATE_INFO_FLAGS_MCS;
3279                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3280                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3281                 break;
3282         case RX_ENC_VHT:
3283                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3284                 ri.mcs = status->rate_idx;
3285                 ri.nss = status->nss;
3286                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3287                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3288                 break;
3289         default:
3290                 WARN_ON(1);
3291                 /* fall through */
3292         case RX_ENC_LEGACY: {
3293                 struct ieee80211_supported_band *sband;
3294                 int shift = 0;
3295                 int bitrate;
3296
3297                 switch (status->bw) {
3298                 case RATE_INFO_BW_10:
3299                         shift = 1;
3300                         break;
3301                 case RATE_INFO_BW_5:
3302                         shift = 2;
3303                         break;
3304                 }
3305
3306                 sband = local->hw.wiphy->bands[status->band];
3307                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3308                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3309
3310                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3311                         /* TODO: handle HT/VHT preambles */
3312                         if (status->band == NL80211_BAND_5GHZ) {
3313                                 ts += 20 << shift;
3314                                 mpdu_offset += 2;
3315                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3316                                 ts += 96;
3317                         } else {
3318                                 ts += 192;
3319                         }
3320                 }
3321                 break;
3322                 }
3323         }
3324
3325         rate = cfg80211_calculate_bitrate(&ri);
3326         if (WARN_ONCE(!rate,
3327                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3328                       (unsigned long long)status->flag, status->rate_idx,
3329                       status->nss))
3330                 return 0;
3331
3332         /* rewind from end of MPDU */
3333         if (status->flag & RX_FLAG_MACTIME_END)
3334                 ts -= mpdu_len * 8 * 10 / rate;
3335
3336         ts += mpdu_offset * 8 * 10 / rate;
3337
3338         return ts;
3339 }
3340
3341 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3342 {
3343         struct ieee80211_sub_if_data *sdata;
3344         struct cfg80211_chan_def chandef;
3345
3346         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3347         ASSERT_RTNL();
3348
3349         mutex_lock(&local->mtx);
3350         list_for_each_entry(sdata, &local->interfaces, list) {
3351                 /* it might be waiting for the local->mtx, but then
3352                  * by the time it gets it, sdata->wdev.cac_started
3353                  * will no longer be true
3354                  */
3355                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3356
3357                 if (sdata->wdev.cac_started) {
3358                         chandef = sdata->vif.bss_conf.chandef;
3359                         ieee80211_vif_release_channel(sdata);
3360                         cfg80211_cac_event(sdata->dev,
3361                                            &chandef,
3362                                            NL80211_RADAR_CAC_ABORTED,
3363                                            GFP_KERNEL);
3364                 }
3365         }
3366         mutex_unlock(&local->mtx);
3367 }
3368
3369 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3370 {
3371         struct ieee80211_local *local =
3372                 container_of(work, struct ieee80211_local, radar_detected_work);
3373         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3374         struct ieee80211_chanctx *ctx;
3375         int num_chanctx = 0;
3376
3377         mutex_lock(&local->chanctx_mtx);
3378         list_for_each_entry(ctx, &local->chanctx_list, list) {
3379                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3380                         continue;
3381
3382                 num_chanctx++;
3383                 chandef = ctx->conf.def;
3384         }
3385         mutex_unlock(&local->chanctx_mtx);
3386
3387         rtnl_lock();
3388         ieee80211_dfs_cac_cancel(local);
3389         rtnl_unlock();
3390
3391         if (num_chanctx > 1)
3392                 /* XXX: multi-channel is not supported yet */
3393                 WARN_ON(1);
3394         else
3395                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3396 }
3397
3398 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3399 {
3400         struct ieee80211_local *local = hw_to_local(hw);
3401
3402         trace_api_radar_detected(local);
3403
3404         schedule_work(&local->radar_detected_work);
3405 }
3406 EXPORT_SYMBOL(ieee80211_radar_detected);
3407
3408 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3409 {
3410         u32 ret;
3411         int tmp;
3412
3413         switch (c->width) {
3414         case NL80211_CHAN_WIDTH_20:
3415                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3416                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3417                 break;
3418         case NL80211_CHAN_WIDTH_40:
3419                 c->width = NL80211_CHAN_WIDTH_20;
3420                 c->center_freq1 = c->chan->center_freq;
3421                 ret = IEEE80211_STA_DISABLE_40MHZ |
3422                       IEEE80211_STA_DISABLE_VHT;
3423                 break;
3424         case NL80211_CHAN_WIDTH_80:
3425                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3426                 /* n_P40 */
3427                 tmp /= 2;
3428                 /* freq_P40 */
3429                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3430                 c->width = NL80211_CHAN_WIDTH_40;
3431                 ret = IEEE80211_STA_DISABLE_VHT;
3432                 break;
3433         case NL80211_CHAN_WIDTH_80P80:
3434                 c->center_freq2 = 0;
3435                 c->width = NL80211_CHAN_WIDTH_80;
3436                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3437                       IEEE80211_STA_DISABLE_160MHZ;
3438                 break;
3439         case NL80211_CHAN_WIDTH_160:
3440                 /* n_P20 */
3441                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3442                 /* n_P80 */
3443                 tmp /= 4;
3444                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3445                 c->width = NL80211_CHAN_WIDTH_80;
3446                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3447                       IEEE80211_STA_DISABLE_160MHZ;
3448                 break;
3449         default:
3450         case NL80211_CHAN_WIDTH_20_NOHT:
3451                 WARN_ON_ONCE(1);
3452                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3453                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3454                 break;
3455         case NL80211_CHAN_WIDTH_5:
3456         case NL80211_CHAN_WIDTH_10:
3457                 WARN_ON_ONCE(1);
3458                 /* keep c->width */
3459                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3460                 break;
3461         }
3462
3463         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3464
3465         return ret;
3466 }
3467
3468 /*
3469  * Returns true if smps_mode_new is strictly more restrictive than
3470  * smps_mode_old.
3471  */
3472 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3473                                    enum ieee80211_smps_mode smps_mode_new)
3474 {
3475         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3476                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3477                 return false;
3478
3479         switch (smps_mode_old) {
3480         case IEEE80211_SMPS_STATIC:
3481                 return false;
3482         case IEEE80211_SMPS_DYNAMIC:
3483                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3484         case IEEE80211_SMPS_OFF:
3485                 return smps_mode_new != IEEE80211_SMPS_OFF;
3486         default:
3487                 WARN_ON(1);
3488         }
3489
3490         return false;
3491 }
3492
3493 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3494                               struct cfg80211_csa_settings *csa_settings)
3495 {
3496         struct sk_buff *skb;
3497         struct ieee80211_mgmt *mgmt;
3498         struct ieee80211_local *local = sdata->local;
3499         int freq;
3500         int hdr_len = offsetofend(struct ieee80211_mgmt,
3501                                   u.action.u.chan_switch);
3502         u8 *pos;
3503
3504         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3505             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3506                 return -EOPNOTSUPP;
3507
3508         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3509                             5 + /* channel switch announcement element */
3510                             3 + /* secondary channel offset element */
3511                             5 + /* wide bandwidth channel switch announcement */
3512                             8); /* mesh channel switch parameters element */
3513         if (!skb)
3514                 return -ENOMEM;
3515
3516         skb_reserve(skb, local->tx_headroom);
3517         mgmt = skb_put_zero(skb, hdr_len);
3518         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3519                                           IEEE80211_STYPE_ACTION);
3520
3521         eth_broadcast_addr(mgmt->da);
3522         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3523         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3524                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3525         } else {
3526                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3527                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3528         }
3529         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3530         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3531         pos = skb_put(skb, 5);
3532         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3533         *pos++ = 3;                                             /* IE length */
3534         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3535         freq = csa_settings->chandef.chan->center_freq;
3536         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3537         *pos++ = csa_settings->count;                           /* count */
3538
3539         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3540                 enum nl80211_channel_type ch_type;
3541
3542                 skb_put(skb, 3);
3543                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3544                 *pos++ = 1;                                     /* IE length */
3545                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3546                 if (ch_type == NL80211_CHAN_HT40PLUS)
3547                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3548                 else
3549                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3550         }
3551
3552         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3553                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3554
3555                 skb_put(skb, 8);
3556                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3557                 *pos++ = 6;                                     /* IE length */
3558                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3559                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3560                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3561                 *pos++ |= csa_settings->block_tx ?
3562                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3563                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3564                 pos += 2;
3565                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3566                 pos += 2;
3567         }
3568
3569         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3570             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3571             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3572                 skb_put(skb, 5);
3573                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3574         }
3575
3576         ieee80211_tx_skb(sdata, skb);
3577         return 0;
3578 }
3579
3580 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3581 {
3582         return !(cs == NULL || cs->cipher == 0 ||
3583                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3584                  cs->hdr_len <= cs->key_idx_off ||
3585                  cs->key_idx_shift > 7 ||
3586                  cs->key_idx_mask == 0);
3587 }
3588
3589 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3590 {
3591         int i;
3592
3593         /* Ensure we have enough iftype bitmap space for all iftype values */
3594         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3595
3596         for (i = 0; i < n; i++)
3597                 if (!ieee80211_cs_valid(&cs[i]))
3598                         return false;
3599
3600         return true;
3601 }
3602
3603 const struct ieee80211_cipher_scheme *
3604 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3605                  enum nl80211_iftype iftype)
3606 {
3607         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3608         int n = local->hw.n_cipher_schemes;
3609         int i;
3610         const struct ieee80211_cipher_scheme *cs = NULL;
3611
3612         for (i = 0; i < n; i++) {
3613                 if (l[i].cipher == cipher) {
3614                         cs = &l[i];
3615                         break;
3616                 }
3617         }
3618
3619         if (!cs || !(cs->iftype & BIT(iftype)))
3620                 return NULL;
3621
3622         return cs;
3623 }
3624
3625 int ieee80211_cs_headroom(struct ieee80211_local *local,
3626                           struct cfg80211_crypto_settings *crypto,
3627                           enum nl80211_iftype iftype)
3628 {
3629         const struct ieee80211_cipher_scheme *cs;
3630         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3631         int i;
3632
3633         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3634                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3635                                       iftype);
3636
3637                 if (cs && headroom < cs->hdr_len)
3638                         headroom = cs->hdr_len;
3639         }
3640
3641         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3642         if (cs && headroom < cs->hdr_len)
3643                 headroom = cs->hdr_len;
3644
3645         return headroom;
3646 }
3647
3648 static bool
3649 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3650 {
3651         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3652         int skip;
3653
3654         if (end > 0)
3655                 return false;
3656
3657         /* One shot NOA  */
3658         if (data->count[i] == 1)
3659                 return false;
3660
3661         if (data->desc[i].interval == 0)
3662                 return false;
3663
3664         /* End time is in the past, check for repetitions */
3665         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3666         if (data->count[i] < 255) {
3667                 if (data->count[i] <= skip) {
3668                         data->count[i] = 0;
3669                         return false;
3670                 }
3671
3672                 data->count[i] -= skip;
3673         }
3674
3675         data->desc[i].start += skip * data->desc[i].interval;
3676
3677         return true;
3678 }
3679
3680 static bool
3681 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3682                              s32 *offset)
3683 {
3684         bool ret = false;
3685         int i;
3686
3687         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3688                 s32 cur;
3689
3690                 if (!data->count[i])
3691                         continue;
3692
3693                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3694                         ret = true;
3695
3696                 cur = data->desc[i].start - tsf;
3697                 if (cur > *offset)
3698                         continue;
3699
3700                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3701                 if (cur > *offset)
3702                         *offset = cur;
3703         }
3704
3705         return ret;
3706 }
3707
3708 static u32
3709 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3710 {
3711         s32 offset = 0;
3712         int tries = 0;
3713         /*
3714          * arbitrary limit, used to avoid infinite loops when combined NoA
3715          * descriptors cover the full time period.
3716          */
3717         int max_tries = 5;
3718
3719         ieee80211_extend_absent_time(data, tsf, &offset);
3720         do {
3721                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3722                         break;
3723
3724                 tries++;
3725         } while (tries < max_tries);
3726
3727         return offset;
3728 }
3729
3730 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3731 {
3732         u32 next_offset = BIT(31) - 1;
3733         int i;
3734
3735         data->absent = 0;
3736         data->has_next_tsf = false;
3737         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3738                 s32 start;
3739
3740                 if (!data->count[i])
3741                         continue;
3742
3743                 ieee80211_extend_noa_desc(data, tsf, i);
3744                 start = data->desc[i].start - tsf;
3745                 if (start <= 0)
3746                         data->absent |= BIT(i);
3747
3748                 if (next_offset > start)
3749                         next_offset = start;
3750
3751                 data->has_next_tsf = true;
3752         }
3753
3754         if (data->absent)
3755                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3756
3757         data->next_tsf = tsf + next_offset;
3758 }
3759 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3760
3761 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3762                             struct ieee80211_noa_data *data, u32 tsf)
3763 {
3764         int ret = 0;
3765         int i;
3766
3767         memset(data, 0, sizeof(*data));
3768
3769         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3770                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3771
3772                 if (!desc->count || !desc->duration)
3773                         continue;
3774
3775                 data->count[i] = desc->count;
3776                 data->desc[i].start = le32_to_cpu(desc->start_time);
3777                 data->desc[i].duration = le32_to_cpu(desc->duration);
3778                 data->desc[i].interval = le32_to_cpu(desc->interval);
3779
3780                 if (data->count[i] > 1 &&
3781                     data->desc[i].interval < data->desc[i].duration)
3782                         continue;
3783
3784                 ieee80211_extend_noa_desc(data, tsf, i);
3785                 ret++;
3786         }
3787
3788         if (ret)
3789                 ieee80211_update_p2p_noa(data, tsf);
3790
3791         return ret;
3792 }
3793 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3794
3795 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3796                            struct ieee80211_sub_if_data *sdata)
3797 {
3798         u64 tsf = drv_get_tsf(local, sdata);
3799         u64 dtim_count = 0;
3800         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3801         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3802         struct ps_data *ps;
3803         u8 bcns_from_dtim;
3804
3805         if (tsf == -1ULL || !beacon_int || !dtim_period)
3806                 return;
3807
3808         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3809             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3810                 if (!sdata->bss)
3811                         return;
3812
3813                 ps = &sdata->bss->ps;
3814         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3815                 ps = &sdata->u.mesh.ps;
3816         } else {
3817                 return;
3818         }
3819
3820         /*
3821          * actually finds last dtim_count, mac80211 will update in
3822          * __beacon_add_tim().
3823          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3824          */
3825         do_div(tsf, beacon_int);
3826         bcns_from_dtim = do_div(tsf, dtim_period);
3827         /* just had a DTIM */
3828         if (!bcns_from_dtim)
3829                 dtim_count = 0;
3830         else
3831                 dtim_count = dtim_period - bcns_from_dtim;
3832
3833         ps->dtim_count = dtim_count;
3834 }
3835
3836 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3837                                          struct ieee80211_chanctx *ctx)
3838 {
3839         struct ieee80211_sub_if_data *sdata;
3840         u8 radar_detect = 0;
3841
3842         lockdep_assert_held(&local->chanctx_mtx);
3843
3844         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3845                 return 0;
3846
3847         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3848                 if (sdata->reserved_radar_required)
3849                         radar_detect |= BIT(sdata->reserved_chandef.width);
3850
3851         /*
3852          * An in-place reservation context should not have any assigned vifs
3853          * until it replaces the other context.
3854          */
3855         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3856                 !list_empty(&ctx->assigned_vifs));
3857
3858         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3859                 if (sdata->radar_required)
3860                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3861
3862         return radar_detect;
3863 }
3864
3865 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3866                                  const struct cfg80211_chan_def *chandef,
3867                                  enum ieee80211_chanctx_mode chanmode,
3868                                  u8 radar_detect)
3869 {
3870         struct ieee80211_local *local = sdata->local;
3871         struct ieee80211_sub_if_data *sdata_iter;
3872         enum nl80211_iftype iftype = sdata->wdev.iftype;
3873         struct ieee80211_chanctx *ctx;
3874         int total = 1;
3875         struct iface_combination_params params = {
3876                 .radar_detect = radar_detect,
3877         };
3878
3879         lockdep_assert_held(&local->chanctx_mtx);
3880
3881         if (WARN_ON(hweight32(radar_detect) > 1))
3882                 return -EINVAL;
3883
3884         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3885                     !chandef->chan))
3886                 return -EINVAL;
3887
3888         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3889                 return -EINVAL;
3890
3891         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3892             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3893                 /*
3894                  * always passing this is harmless, since it'll be the
3895                  * same value that cfg80211 finds if it finds the same
3896                  * interface ... and that's always allowed
3897                  */
3898                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3899         }
3900
3901         /* Always allow software iftypes */
3902         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3903                 if (radar_detect)
3904                         return -EINVAL;
3905                 return 0;
3906         }
3907
3908         if (chandef)
3909                 params.num_different_channels = 1;
3910
3911         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3912                 params.iftype_num[iftype] = 1;
3913
3914         list_for_each_entry(ctx, &local->chanctx_list, list) {
3915                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3916                         continue;
3917                 params.radar_detect |=
3918                         ieee80211_chanctx_radar_detect(local, ctx);
3919                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3920                         params.num_different_channels++;
3921                         continue;
3922                 }
3923                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3924                     cfg80211_chandef_compatible(chandef,
3925                                                 &ctx->conf.def))
3926                         continue;
3927                 params.num_different_channels++;
3928         }
3929
3930         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3931                 struct wireless_dev *wdev_iter;
3932
3933                 wdev_iter = &sdata_iter->wdev;
3934
3935                 if (sdata_iter == sdata ||
3936                     !ieee80211_sdata_running(sdata_iter) ||
3937                     cfg80211_iftype_allowed(local->hw.wiphy,
3938                                             wdev_iter->iftype, 0, 1))
3939                         continue;
3940
3941                 params.iftype_num[wdev_iter->iftype]++;
3942                 total++;
3943         }
3944
3945         if (total == 1 && !params.radar_detect)
3946                 return 0;
3947
3948         return cfg80211_check_combinations(local->hw.wiphy, &params);
3949 }
3950
3951 static void
3952 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3953                          void *data)
3954 {
3955         u32 *max_num_different_channels = data;
3956
3957         *max_num_different_channels = max(*max_num_different_channels,
3958                                           c->num_different_channels);
3959 }
3960
3961 int ieee80211_max_num_channels(struct ieee80211_local *local)
3962 {
3963         struct ieee80211_sub_if_data *sdata;
3964         struct ieee80211_chanctx *ctx;
3965         u32 max_num_different_channels = 1;
3966         int err;
3967         struct iface_combination_params params = {0};
3968
3969         lockdep_assert_held(&local->chanctx_mtx);
3970
3971         list_for_each_entry(ctx, &local->chanctx_list, list) {
3972                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3973                         continue;
3974
3975                 params.num_different_channels++;
3976
3977                 params.radar_detect |=
3978                         ieee80211_chanctx_radar_detect(local, ctx);
3979         }
3980
3981         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3982                 params.iftype_num[sdata->wdev.iftype]++;
3983
3984         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3985                                          ieee80211_iter_max_chans,
3986                                          &max_num_different_channels);
3987         if (err < 0)
3988                 return err;
3989
3990         return max_num_different_channels;
3991 }
3992
3993 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3994 {
3995         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3996         *buf++ = 7; /* len */
3997         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3998         *buf++ = 0x50;
3999         *buf++ = 0xf2;
4000         *buf++ = 2; /* WME */
4001         *buf++ = 0; /* WME info */
4002         *buf++ = 1; /* WME ver */
4003         *buf++ = qosinfo; /* U-APSD no in use */
4004
4005         return buf;
4006 }
4007
4008 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4009                              unsigned long *frame_cnt,
4010                              unsigned long *byte_cnt)
4011 {
4012         struct txq_info *txqi = to_txq_info(txq);
4013         u32 frag_cnt = 0, frag_bytes = 0;
4014         struct sk_buff *skb;
4015
4016         skb_queue_walk(&txqi->frags, skb) {
4017                 frag_cnt++;
4018                 frag_bytes += skb->len;
4019         }
4020
4021         if (frame_cnt)
4022                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4023
4024         if (byte_cnt)
4025                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4026 }
4027 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4028
4029 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4030         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4031         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4032         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4033         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4034 };