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                         if (crc)
 917                                 *crc = crc32_be(*crc, (void *)elem,
 918                                                 elem->datalen + 2);
 919                         elems->he_operation = data;
 920                 }
 921                 break;
 922         case WLAN_EID_EXT_UORA:
 923                 if (len == 1)
 924                         elems->uora_element = data;
 925                 break;
 926         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 927                 if (len == 3)
 928                         elems->max_channel_switch_time = data;
 929                 break;
 930         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 931                 if (len == sizeof(*elems->mbssid_config_ie))
 932                         elems->mbssid_config_ie = data;
 933                 break;
 934         case WLAN_EID_EXT_HE_SPR:
 935                 if (len >= sizeof(*elems->he_spr) &&
 936                     len >= ieee80211_he_spr_size(data))
 937                         elems->he_spr = data;
 938                 break;
 939         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 940                 if (len == sizeof(*elems->he_6ghz_capa))
 941                         elems->he_6ghz_capa = data;
 942                 break;
 943         }
 944 }
 945
 946 static u32
 947 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 948                             struct ieee802_11_elems *elems,
 949                             u64 filter, u32 crc,
 950                             const struct element *check_inherit)
 951 {
 952         const struct element *elem;
 953         bool calc_crc = filter != 0;
 954         DECLARE_BITMAP(seen_elems, 256);
 955         const u8 *ie;
 956
 957         bitmap_zero(seen_elems, 256);
 958
 959         for_each_element(elem, start, len) {
 960                 bool elem_parse_failed;
 961                 u8 id = elem->id;
 962                 u8 elen = elem->datalen;
 963                 const u8 *pos = elem->data;
 964
 965                 if (check_inherit &&
 966                     !cfg80211_is_element_inherited(elem,
 967                                                    check_inherit))
 968                         continue;
 969
 970                 switch (id) {
 971                 case WLAN_EID_SSID:
 972                 case WLAN_EID_SUPP_RATES:
 973                 case WLAN_EID_FH_PARAMS:
 974                 case WLAN_EID_DS_PARAMS:
 975                 case WLAN_EID_CF_PARAMS:
 976                 case WLAN_EID_TIM:
 977                 case WLAN_EID_IBSS_PARAMS:
 978                 case WLAN_EID_CHALLENGE:
 979                 case WLAN_EID_RSN:
 980                 case WLAN_EID_ERP_INFO:
 981                 case WLAN_EID_EXT_SUPP_RATES:
 982                 case WLAN_EID_HT_CAPABILITY:
 983                 case WLAN_EID_HT_OPERATION:
 984                 case WLAN_EID_VHT_CAPABILITY:
 985                 case WLAN_EID_VHT_OPERATION:
 986                 case WLAN_EID_MESH_ID:
 987                 case WLAN_EID_MESH_CONFIG:
 988                 case WLAN_EID_PEER_MGMT:
 989                 case WLAN_EID_PREQ:
 990                 case WLAN_EID_PREP:
 991                 case WLAN_EID_PERR:
 992                 case WLAN_EID_RANN:
 993                 case WLAN_EID_CHANNEL_SWITCH:
 994                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 995                 case WLAN_EID_COUNTRY:
 996                 case WLAN_EID_PWR_CONSTRAINT:
 997                 case WLAN_EID_TIMEOUT_INTERVAL:
 998                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 999                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1000                 case WLAN_EID_CHAN_SWITCH_PARAM:
1001                 case WLAN_EID_EXT_CAPABILITY:
1002                 case WLAN_EID_CHAN_SWITCH_TIMING:
1003                 case WLAN_EID_LINK_ID:
1004                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1005                 case WLAN_EID_RSNX:
1006                 /*
1007                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1008                  * that if the content gets bigger it might be needed more than once
1009                  */
1010                         if (test_bit(id, seen_elems)) {
1011                                 elems->parse_error = true;
1012                                 continue;
1013                         }
1014                         break;
1015                 }
1016
1017                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1018                         crc = crc32_be(crc, pos - 2, elen + 2);
1019
1020                 elem_parse_failed = false;
1021
1022                 switch (id) {
1023                 case WLAN_EID_LINK_ID:
1024                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1025                                 elem_parse_failed = true;
1026                                 break;
1027                         }
1028                         elems->lnk_id = (void *)(pos - 2);
1029                         break;
1030                 case WLAN_EID_CHAN_SWITCH_TIMING:
1031                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1032                                 elem_parse_failed = true;
1033                                 break;
1034                         }
1035                         elems->ch_sw_timing = (void *)pos;
1036                         break;
1037                 case WLAN_EID_EXT_CAPABILITY:
1038                         elems->ext_capab = pos;
1039                         elems->ext_capab_len = elen;
1040                         break;
1041                 case WLAN_EID_SSID:
1042                         elems->ssid = pos;
1043                         elems->ssid_len = elen;
1044                         break;
1045                 case WLAN_EID_SUPP_RATES:
1046                         elems->supp_rates = pos;
1047                         elems->supp_rates_len = elen;
1048                         break;
1049                 case WLAN_EID_DS_PARAMS:
1050                         if (elen >= 1)
1051                                 elems->ds_params = pos;
1052                         else
1053                                 elem_parse_failed = true;
1054                         break;
1055                 case WLAN_EID_TIM:
1056                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1057                                 elems->tim = (void *)pos;
1058                                 elems->tim_len = elen;
1059                         } else
1060                                 elem_parse_failed = true;
1061                         break;
1062                 case WLAN_EID_CHALLENGE:
1063                         elems->challenge = pos;
1064                         elems->challenge_len = elen;
1065                         break;
1066                 case WLAN_EID_VENDOR_SPECIFIC:
1067                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1068                             pos[2] == 0xf2) {
1069                                 /* Microsoft OUI (00:50:F2) */
1070
1071                                 if (calc_crc)
1072                                         crc = crc32_be(crc, pos - 2, elen + 2);
1073
1074                                 if (elen >= 5 && pos[3] == 2) {
1075                                         /* OUI Type 2 - WMM IE */
1076                                         if (pos[4] == 0) {
1077                                                 elems->wmm_info = pos;
1078                                                 elems->wmm_info_len = elen;
1079                                         } else if (pos[4] == 1) {
1080                                                 elems->wmm_param = pos;
1081                                                 elems->wmm_param_len = elen;
1082                                         }
1083                                 }
1084                         }
1085                         break;
1086                 case WLAN_EID_RSN:
1087                         elems->rsn = pos;
1088                         elems->rsn_len = elen;
1089                         break;
1090                 case WLAN_EID_ERP_INFO:
1091                         if (elen >= 1)
1092                                 elems->erp_info = pos;
1093                         else
1094                                 elem_parse_failed = true;
1095                         break;
1096                 case WLAN_EID_EXT_SUPP_RATES:
1097                         elems->ext_supp_rates = pos;
1098                         elems->ext_supp_rates_len = elen;
1099                         break;
1100                 case WLAN_EID_HT_CAPABILITY:
1101                         if (elen >= sizeof(struct ieee80211_ht_cap))
1102                                 elems->ht_cap_elem = (void *)pos;
1103                         else
1104                                 elem_parse_failed = true;
1105                         break;
1106                 case WLAN_EID_HT_OPERATION:
1107                         if (elen >= sizeof(struct ieee80211_ht_operation))
1108                                 elems->ht_operation = (void *)pos;
1109                         else
1110                                 elem_parse_failed = true;
1111                         break;
1112                 case WLAN_EID_VHT_CAPABILITY:
1113                         if (elen >= sizeof(struct ieee80211_vht_cap))
1114                                 elems->vht_cap_elem = (void *)pos;
1115                         else
1116                                 elem_parse_failed = true;
1117                         break;
1118                 case WLAN_EID_VHT_OPERATION:
1119                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1120                                 elems->vht_operation = (void *)pos;
1121                                 if (calc_crc)
1122                                         crc = crc32_be(crc, pos - 2, elen + 2);
1123                                 break;
1124                         }
1125                         elem_parse_failed = true;
1126                         break;
1127                 case WLAN_EID_OPMODE_NOTIF:
1128                         if (elen > 0) {
1129                                 elems->opmode_notif = pos;
1130                                 if (calc_crc)
1131                                         crc = crc32_be(crc, pos - 2, elen + 2);
1132                                 break;
1133                         }
1134                         elem_parse_failed = true;
1135                         break;
1136                 case WLAN_EID_MESH_ID:
1137                         elems->mesh_id = pos;
1138                         elems->mesh_id_len = elen;
1139                         break;
1140                 case WLAN_EID_MESH_CONFIG:
1141                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1142                                 elems->mesh_config = (void *)pos;
1143                         else
1144                                 elem_parse_failed = true;
1145                         break;
1146                 case WLAN_EID_PEER_MGMT:
1147                         elems->peering = pos;
1148                         elems->peering_len = elen;
1149                         break;
1150                 case WLAN_EID_MESH_AWAKE_WINDOW:
1151                         if (elen >= 2)
1152                                 elems->awake_window = (void *)pos;
1153                         break;
1154                 case WLAN_EID_PREQ:
1155                         elems->preq = pos;
1156                         elems->preq_len = elen;
1157                         break;
1158                 case WLAN_EID_PREP:
1159                         elems->prep = pos;
1160                         elems->prep_len = elen;
1161                         break;
1162                 case WLAN_EID_PERR:
1163                         elems->perr = pos;
1164                         elems->perr_len = elen;
1165                         break;
1166                 case WLAN_EID_RANN:
1167                         if (elen >= sizeof(struct ieee80211_rann_ie))
1168                                 elems->rann = (void *)pos;
1169                         else
1170                                 elem_parse_failed = true;
1171                         break;
1172                 case WLAN_EID_CHANNEL_SWITCH:
1173                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1174                                 elem_parse_failed = true;
1175                                 break;
1176                         }
1177                         elems->ch_switch_ie = (void *)pos;
1178                         break;
1179                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1180                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1181                                 elem_parse_failed = true;
1182                                 break;
1183                         }
1184                         elems->ext_chansw_ie = (void *)pos;
1185                         break;
1186                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1187                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1188                                 elem_parse_failed = true;
1189                                 break;
1190                         }
1191                         elems->sec_chan_offs = (void *)pos;
1192                         break;
1193                 case WLAN_EID_CHAN_SWITCH_PARAM:
1194                         if (elen !=
1195                             sizeof(*elems->mesh_chansw_params_ie)) {
1196                                 elem_parse_failed = true;
1197                                 break;
1198                         }
1199                         elems->mesh_chansw_params_ie = (void *)pos;
1200                         break;
1201                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1202                         if (!action ||
1203                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1204                                 elem_parse_failed = true;
1205                                 break;
1206                         }
1207                         elems->wide_bw_chansw_ie = (void *)pos;
1208                         break;
1209                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1210                         if (action) {
1211                                 elem_parse_failed = true;
1212                                 break;
1213                         }
1214                         /*
1215                          * This is a bit tricky, but as we only care about
1216                          * the wide bandwidth channel switch element, so
1217                          * just parse it out manually.
1218                          */
1219                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1220                                               pos, elen);
1221                         if (ie) {
1222                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1223                                         elems->wide_bw_chansw_ie =
1224                                                 (void *)(ie + 2);
1225                                 else
1226                                         elem_parse_failed = true;
1227                         }
1228                         break;
1229                 case WLAN_EID_COUNTRY:
1230                         elems->country_elem = pos;
1231                         elems->country_elem_len = elen;
1232                         break;
1233                 case WLAN_EID_PWR_CONSTRAINT:
1234                         if (elen != 1) {
1235                                 elem_parse_failed = true;
1236                                 break;
1237                         }
1238                         elems->pwr_constr_elem = pos;
1239                         break;
1240                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1241                         /* Lots of different options exist, but we only care
1242                          * about the Dynamic Transmit Power Control element.
1243                          * First check for the Cisco OUI, then for the DTPC
1244                          * tag (0x00).
1245                          */
1246                         if (elen < 4) {
1247                                 elem_parse_failed = true;
1248                                 break;
1249                         }
1250
1251                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1252                             pos[2] != 0x96 || pos[3] != 0x00)
1253                                 break;
1254
1255                         if (elen != 6) {
1256                                 elem_parse_failed = true;
1257                                 break;
1258                         }
1259
1260                         if (calc_crc)
1261                                 crc = crc32_be(crc, pos - 2, elen + 2);
1262
1263                         elems->cisco_dtpc_elem = pos;
1264                         break;
1265                 case WLAN_EID_ADDBA_EXT:
1266                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1267                                 elem_parse_failed = true;
1268                                 break;
1269                         }
1270                         elems->addba_ext_ie = (void *)pos;
1271                         break;
1272                 case WLAN_EID_TIMEOUT_INTERVAL:
1273                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1274                                 elems->timeout_int = (void *)pos;
1275                         else
1276                                 elem_parse_failed = true;
1277                         break;
1278                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1279                         if (elen >= sizeof(*elems->max_idle_period_ie))
1280                                 elems->max_idle_period_ie = (void *)pos;
1281                         break;
1282                 case WLAN_EID_RSNX:
1283                         elems->rsnx = pos;
1284                         elems->rsnx_len = elen;
1285                         break;
1286                 case WLAN_EID_EXTENSION:
1287                         ieee80211_parse_extension_element(calc_crc ?
1288                                                                 &crc : NULL,
1289                                                           elem, elems);
1290                         break;
1291                 default:
1292                         break;
1293                 }
1294
1295                 if (elem_parse_failed)
1296                         elems->parse_error = true;
1297                 else
1298                         __set_bit(id, seen_elems);
1299         }
1300
1301         if (!for_each_element_completed(elem, start, len))
1302                 elems->parse_error = true;
1303
1304         return crc;
1305 }
1306
1307 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1308                                             struct ieee802_11_elems *elems,
1309                                             u8 *transmitter_bssid,
1310                                             u8 *bss_bssid,
1311                                             u8 *nontransmitted_profile)
1312 {
1313         const struct element *elem, *sub;
1314         size_t profile_len = 0;
1315         bool found = false;
1316
1317         if (!bss_bssid || !transmitter_bssid)
1318                 return profile_len;
1319
1320         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1321                 if (elem->datalen < 2)
1322                         continue;
1323
1324                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1325                         u8 new_bssid[ETH_ALEN];
1326                         const u8 *index;
1327
1328                         if (sub->id != 0 || sub->datalen < 4) {
1329                                 /* not a valid BSS profile */
1330                                 continue;
1331                         }
1332
1333                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1334                             sub->data[1] != 2) {
1335                                 /* The first element of the
1336                                  * Nontransmitted BSSID Profile is not
1337                                  * the Nontransmitted BSSID Capability
1338                                  * element.
1339                                  */
1340                                 continue;
1341                         }
1342
1343                         memset(nontransmitted_profile, 0, len);
1344                         profile_len = cfg80211_merge_profile(start, len,
1345                                                              elem,
1346                                                              sub,
1347                                                              nontransmitted_profile,
1348                                                              len);
1349
1350                         /* found a Nontransmitted BSSID Profile */
1351                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1352                                                  nontransmitted_profile,
1353                                                  profile_len);
1354                         if (!index || index[1] < 1 || index[2] == 0) {
1355                                 /* Invalid MBSSID Index element */
1356                                 continue;
1357                         }
1358
1359                         cfg80211_gen_new_bssid(transmitter_bssid,
1360                                                elem->data[0],
1361                                                index[2],
1362                                                new_bssid);
1363                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1364                                 found = true;
1365                                 elems->bssid_index_len = index[1];
1366                                 elems->bssid_index = (void *)&index[2];
1367                                 break;
1368                         }
1369                 }
1370         }
1371
1372         return found ? profile_len : 0;
1373 }
1374
1375 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1376                                struct ieee802_11_elems *elems,
1377                                u64 filter, u32 crc, u8 *transmitter_bssid,
1378                                u8 *bss_bssid)
1379 {
1380         const struct element *non_inherit = NULL;
1381         u8 *nontransmitted_profile;
1382         int nontransmitted_profile_len = 0;
1383
1384         memset(elems, 0, sizeof(*elems));
1385         elems->ie_start = start;
1386         elems->total_len = len;
1387
1388         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1389         if (nontransmitted_profile) {
1390                 nontransmitted_profile_len =
1391                         ieee802_11_find_bssid_profile(start, len, elems,
1392                                                       transmitter_bssid,
1393                                                       bss_bssid,
1394                                                       nontransmitted_profile);
1395                 non_inherit =
1396                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1397                                                nontransmitted_profile,
1398                                                nontransmitted_profile_len);
1399         }
1400
1401         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1402                                           crc, non_inherit);
1403
1404         /* Override with nontransmitted profile, if found */
1405         if (nontransmitted_profile_len)
1406                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1407                                             nontransmitted_profile_len,
1408                                             action, elems, 0, 0, NULL);
1409
1410         if (elems->tim && !elems->parse_error) {
1411                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1412
1413                 elems->dtim_period = tim_ie->dtim_period;
1414                 elems->dtim_count = tim_ie->dtim_count;
1415         }
1416
1417         /* Override DTIM period and count if needed */
1418         if (elems->bssid_index &&
1419             elems->bssid_index_len >=
1420             offsetofend(struct ieee80211_bssid_index, dtim_period))
1421                 elems->dtim_period = elems->bssid_index->dtim_period;
1422
1423         if (elems->bssid_index &&
1424             elems->bssid_index_len >=
1425             offsetofend(struct ieee80211_bssid_index, dtim_count))
1426                 elems->dtim_count = elems->bssid_index->dtim_count;
1427
1428         kfree(nontransmitted_profile);
1429
1430         return crc;
1431 }
1432
1433 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1434                                            struct ieee80211_tx_queue_params
1435                                            *qparam, int ac)
1436 {
1437         struct ieee80211_chanctx_conf *chanctx_conf;
1438         const struct ieee80211_reg_rule *rrule;
1439         const struct ieee80211_wmm_ac *wmm_ac;
1440         u16 center_freq = 0;
1441
1442         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1443             sdata->vif.type != NL80211_IFTYPE_STATION)
1444                 return;
1445
1446         rcu_read_lock();
1447         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1448         if (chanctx_conf)
1449                 center_freq = chanctx_conf->def.chan->center_freq;
1450
1451         if (!center_freq) {
1452                 rcu_read_unlock();
1453                 return;
1454         }
1455
1456         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1457
1458         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1459                 rcu_read_unlock();
1460                 return;
1461         }
1462
1463         if (sdata->vif.type == NL80211_IFTYPE_AP)
1464                 wmm_ac = &rrule->wmm_rule.ap[ac];
1465         else
1466                 wmm_ac = &rrule->wmm_rule.client[ac];
1467         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1468         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1469         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1470         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1471         rcu_read_unlock();
1472 }
1473
1474 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1475                                bool bss_notify, bool enable_qos)
1476 {
1477         struct ieee80211_local *local = sdata->local;
1478         struct ieee80211_tx_queue_params qparam;
1479         struct ieee80211_chanctx_conf *chanctx_conf;
1480         int ac;
1481         bool use_11b;
1482         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1483         int aCWmin, aCWmax;
1484
1485         if (!local->ops->conf_tx)
1486                 return;
1487
1488         if (local->hw.queues < IEEE80211_NUM_ACS)
1489                 return;
1490
1491         memset(&qparam, 0, sizeof(qparam));
1492
1493         rcu_read_lock();
1494         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1495         use_11b = (chanctx_conf &&
1496                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1497                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1498         rcu_read_unlock();
1499
1500         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1501
1502         /* Set defaults according to 802.11-2007 Table 7-37 */
1503         aCWmax = 1023;
1504         if (use_11b)
1505                 aCWmin = 31;
1506         else
1507                 aCWmin = 15;
1508
1509         /* Confiure old 802.11b/g medium access rules. */
1510         qparam.cw_max = aCWmax;
1511         qparam.cw_min = aCWmin;
1512         qparam.txop = 0;
1513         qparam.aifs = 2;
1514
1515         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1516                 /* Update if QoS is enabled. */
1517                 if (enable_qos) {
1518                         switch (ac) {
1519                         case IEEE80211_AC_BK:
1520                                 qparam.cw_max = aCWmax;
1521                                 qparam.cw_min = aCWmin;
1522                                 qparam.txop = 0;
1523                                 if (is_ocb)
1524                                         qparam.aifs = 9;
1525                                 else
1526                                         qparam.aifs = 7;
1527                                 break;
1528                         /* never happens but let's not leave undefined */
1529                         default:
1530                         case IEEE80211_AC_BE:
1531                                 qparam.cw_max = aCWmax;
1532                                 qparam.cw_min = aCWmin;
1533                                 qparam.txop = 0;
1534                                 if (is_ocb)
1535                                         qparam.aifs = 6;
1536                                 else
1537                                         qparam.aifs = 3;
1538                                 break;
1539                         case IEEE80211_AC_VI:
1540                                 qparam.cw_max = aCWmin;
1541                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1542                                 if (is_ocb)
1543                                         qparam.txop = 0;
1544                                 else if (use_11b)
1545                                         qparam.txop = 6016/32;
1546                                 else
1547                                         qparam.txop = 3008/32;
1548
1549                                 if (is_ocb)
1550                                         qparam.aifs = 3;
1551                                 else
1552                                         qparam.aifs = 2;
1553                                 break;
1554                         case IEEE80211_AC_VO:
1555                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1556                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1557                                 if (is_ocb)
1558                                         qparam.txop = 0;
1559                                 else if (use_11b)
1560                                         qparam.txop = 3264/32;
1561                                 else
1562                                         qparam.txop = 1504/32;
1563                                 qparam.aifs = 2;
1564                                 break;
1565                         }
1566                 }
1567                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1568
1569                 qparam.uapsd = false;
1570
1571                 sdata->tx_conf[ac] = qparam;
1572                 drv_conf_tx(local, sdata, ac, &qparam);
1573         }
1574
1575         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1576             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1577             sdata->vif.type != NL80211_IFTYPE_NAN) {
1578                 sdata->vif.bss_conf.qos = enable_qos;
1579                 if (bss_notify)
1580                         ieee80211_bss_info_change_notify(sdata,
1581                                                          BSS_CHANGED_QOS);
1582         }
1583 }
1584
1585 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1586                          u16 transaction, u16 auth_alg, u16 status,
1587                          const u8 *extra, size_t extra_len, const u8 *da,
1588                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1589                          u32 tx_flags)
1590 {
1591         struct ieee80211_local *local = sdata->local;
1592         struct sk_buff *skb;
1593         struct ieee80211_mgmt *mgmt;
1594         int err;
1595
1596         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1597         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1598                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1599         if (!skb)
1600                 return;
1601
1602         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1603
1604         mgmt = skb_put_zero(skb, 24 + 6);
1605         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1606                                           IEEE80211_STYPE_AUTH);
1607         memcpy(mgmt->da, da, ETH_ALEN);
1608         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1609         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1610         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1611         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1612         mgmt->u.auth.status_code = cpu_to_le16(status);
1613         if (extra)
1614                 skb_put_data(skb, extra, extra_len);
1615
1616         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1617                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1618                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1619                 WARN_ON(err);
1620         }
1621
1622         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1623                                         tx_flags;
1624         ieee80211_tx_skb(sdata, skb);
1625 }
1626
1627 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1628                                     const u8 *da, const u8 *bssid,
1629                                     u16 stype, u16 reason,
1630                                     bool send_frame, u8 *frame_buf)
1631 {
1632         struct ieee80211_local *local = sdata->local;
1633         struct sk_buff *skb;
1634         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1635
1636         /* build frame */
1637         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1638         mgmt->duration = 0; /* initialize only */
1639         mgmt->seq_ctrl = 0; /* initialize only */
1640         memcpy(mgmt->da, da, ETH_ALEN);
1641         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1642         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1643         /* u.deauth.reason_code == u.disassoc.reason_code */
1644         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1645
1646         if (send_frame) {
1647                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1648                                     IEEE80211_DEAUTH_FRAME_LEN);
1649                 if (!skb)
1650                         return;
1651
1652                 skb_reserve(skb, local->hw.extra_tx_headroom);
1653
1654                 /* copy in frame */
1655                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1656
1657                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1658                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1659                         IEEE80211_SKB_CB(skb)->flags |=
1660                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1661
1662                 ieee80211_tx_skb(sdata, skb);
1663         }
1664 }
1665
1666 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1667                                          u8 *buffer, size_t buffer_len,
1668                                          const u8 *ie, size_t ie_len,
1669                                          enum nl80211_band band,
1670                                          u32 rate_mask,
1671                                          struct cfg80211_chan_def *chandef,
1672                                          size_t *offset, u32 flags)
1673 {
1674         struct ieee80211_supported_band *sband;
1675         const struct ieee80211_sta_he_cap *he_cap;
1676         u8 *pos = buffer, *end = buffer + buffer_len;
1677         size_t noffset;
1678         int supp_rates_len, i;
1679         u8 rates[32];
1680         int num_rates;
1681         int ext_rates_len;
1682         int shift;
1683         u32 rate_flags;
1684         bool have_80mhz = false;
1685
1686         *offset = 0;
1687
1688         sband = local->hw.wiphy->bands[band];
1689         if (WARN_ON_ONCE(!sband))
1690                 return 0;
1691
1692         rate_flags = ieee80211_chandef_rate_flags(chandef);
1693         shift = ieee80211_chandef_get_shift(chandef);
1694
1695         num_rates = 0;
1696         for (i = 0; i < sband->n_bitrates; i++) {
1697                 if ((BIT(i) & rate_mask) == 0)
1698                         continue; /* skip rate */
1699                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1700                         continue;
1701
1702                 rates[num_rates++] =
1703                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1704                                           (1 << shift) * 5);
1705         }
1706
1707         supp_rates_len = min_t(int, num_rates, 8);
1708
1709         if (end - pos < 2 + supp_rates_len)
1710                 goto out_err;
1711         *pos++ = WLAN_EID_SUPP_RATES;
1712         *pos++ = supp_rates_len;
1713         memcpy(pos, rates, supp_rates_len);
1714         pos += supp_rates_len;
1715
1716         /* insert "request information" if in custom IEs */
1717         if (ie && ie_len) {
1718                 static const u8 before_extrates[] = {
1719                         WLAN_EID_SSID,
1720                         WLAN_EID_SUPP_RATES,
1721                         WLAN_EID_REQUEST,
1722                 };
1723                 noffset = ieee80211_ie_split(ie, ie_len,
1724                                              before_extrates,
1725                                              ARRAY_SIZE(before_extrates),
1726                                              *offset);
1727                 if (end - pos < noffset - *offset)
1728                         goto out_err;
1729                 memcpy(pos, ie + *offset, noffset - *offset);
1730                 pos += noffset - *offset;
1731                 *offset = noffset;
1732         }
1733
1734         ext_rates_len = num_rates - supp_rates_len;
1735         if (ext_rates_len > 0) {
1736                 if (end - pos < 2 + ext_rates_len)
1737                         goto out_err;
1738                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1739                 *pos++ = ext_rates_len;
1740                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1741                 pos += ext_rates_len;
1742         }
1743
1744         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1745                 if (end - pos < 3)
1746                         goto out_err;
1747                 *pos++ = WLAN_EID_DS_PARAMS;
1748                 *pos++ = 1;
1749                 *pos++ = ieee80211_frequency_to_channel(
1750                                 chandef->chan->center_freq);
1751         }
1752
1753         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1754                 goto done;
1755
1756         /* insert custom IEs that go before HT */
1757         if (ie && ie_len) {
1758                 static const u8 before_ht[] = {
1759                         /*
1760                          * no need to list the ones split off already
1761                          * (or generated here)
1762                          */
1763                         WLAN_EID_DS_PARAMS,
1764                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1765                 };
1766                 noffset = ieee80211_ie_split(ie, ie_len,
1767                                              before_ht, ARRAY_SIZE(before_ht),
1768                                              *offset);
1769                 if (end - pos < noffset - *offset)
1770                         goto out_err;
1771                 memcpy(pos, ie + *offset, noffset - *offset);
1772                 pos += noffset - *offset;
1773                 *offset = noffset;
1774         }
1775
1776         if (sband->ht_cap.ht_supported) {
1777                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1778                         goto out_err;
1779                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1780                                                 sband->ht_cap.cap);
1781         }
1782
1783         /* insert custom IEs that go before VHT */
1784         if (ie && ie_len) {
1785                 static const u8 before_vht[] = {
1786                         /*
1787                          * no need to list the ones split off already
1788                          * (or generated here)
1789                          */
1790                         WLAN_EID_BSS_COEX_2040,
1791                         WLAN_EID_EXT_CAPABILITY,
1792                         WLAN_EID_SSID_LIST,
1793                         WLAN_EID_CHANNEL_USAGE,
1794                         WLAN_EID_INTERWORKING,
1795                         WLAN_EID_MESH_ID,
1796                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1797                 };
1798                 noffset = ieee80211_ie_split(ie, ie_len,
1799                                              before_vht, ARRAY_SIZE(before_vht),
1800                                              *offset);
1801                 if (end - pos < noffset - *offset)
1802                         goto out_err;
1803                 memcpy(pos, ie + *offset, noffset - *offset);
1804                 pos += noffset - *offset;
1805                 *offset = noffset;
1806         }
1807
1808         /* Check if any channel in this sband supports at least 80 MHz */
1809         for (i = 0; i < sband->n_channels; i++) {
1810                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1811                                                 IEEE80211_CHAN_NO_80MHZ))
1812                         continue;
1813
1814                 have_80mhz = true;
1815                 break;
1816         }
1817
1818         if (sband->vht_cap.vht_supported && have_80mhz) {
1819                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1820                         goto out_err;
1821                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1822                                                  sband->vht_cap.cap);
1823         }
1824
1825         /* insert custom IEs that go before HE */
1826         if (ie && ie_len) {
1827                 static const u8 before_he[] = {
1828                         /*
1829                          * no need to list the ones split off before VHT
1830                          * or generated here
1831                          */
1832                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1833                         WLAN_EID_AP_CSN,
1834                         /* TODO: add 11ah/11aj/11ak elements */
1835                 };
1836                 noffset = ieee80211_ie_split(ie, ie_len,
1837                                              before_he, ARRAY_SIZE(before_he),
1838                                              *offset);
1839                 if (end - pos < noffset - *offset)
1840                         goto out_err;
1841                 memcpy(pos, ie + *offset, noffset - *offset);
1842                 pos += noffset - *offset;
1843                 *offset = noffset;
1844         }
1845
1846         he_cap = ieee80211_get_he_sta_cap(sband);
1847         if (he_cap) {
1848                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1849                 if (!pos)
1850                         goto out_err;
1851         }
1852
1853         /*
1854          * If adding more here, adjust code in main.c
1855          * that calculates local->scan_ies_len.
1856          */
1857
1858         return pos - buffer;
1859  out_err:
1860         WARN_ONCE(1, "not enough space for preq IEs\n");
1861  done:
1862         return pos - buffer;
1863 }
1864
1865 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1866                              size_t buffer_len,
1867                              struct ieee80211_scan_ies *ie_desc,
1868                              const u8 *ie, size_t ie_len,
1869                              u8 bands_used, u32 *rate_masks,
1870                              struct cfg80211_chan_def *chandef,
1871                              u32 flags)
1872 {
1873         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1874         int i;
1875
1876         memset(ie_desc, 0, sizeof(*ie_desc));
1877
1878         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1879                 if (bands_used & BIT(i)) {
1880                         pos += ieee80211_build_preq_ies_band(local,
1881                                                              buffer + pos,
1882                                                              buffer_len - pos,
1883                                                              ie, ie_len, i,
1884                                                              rate_masks[i],
1885                                                              chandef,
1886                                                              &custom_ie_offset,
1887                                                              flags);
1888                         ie_desc->ies[i] = buffer + old_pos;
1889                         ie_desc->len[i] = pos - old_pos;
1890                         old_pos = pos;
1891                 }
1892         }
1893
1894         /* add any remaining custom IEs */
1895         if (ie && ie_len) {
1896                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1897                               "not enough space for preq custom IEs\n"))
1898                         return pos;
1899                 memcpy(buffer + pos, ie + custom_ie_offset,
1900                        ie_len - custom_ie_offset);
1901                 ie_desc->common_ies = buffer + pos;
1902                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1903                 pos += ie_len - custom_ie_offset;
1904         }
1905
1906         return pos;
1907 };
1908
1909 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1910                                           const u8 *src, const u8 *dst,
1911                                           u32 ratemask,
1912                                           struct ieee80211_channel *chan,
1913                                           const u8 *ssid, size_t ssid_len,
1914                                           const u8 *ie, size_t ie_len,
1915                                           u32 flags)
1916 {
1917         struct ieee80211_local *local = sdata->local;
1918         struct cfg80211_chan_def chandef;
1919         struct sk_buff *skb;
1920         struct ieee80211_mgmt *mgmt;
1921         int ies_len;
1922         u32 rate_masks[NUM_NL80211_BANDS] = {};
1923         struct ieee80211_scan_ies dummy_ie_desc;
1924
1925         /*
1926          * Do not send DS Channel parameter for directed probe requests
1927          * in order to maximize the chance that we get a response.  Some
1928          * badly-behaved APs don't respond when this parameter is included.
1929          */
1930         chandef.width = sdata->vif.bss_conf.chandef.width;
1931         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1932                 chandef.chan = NULL;
1933         else
1934                 chandef.chan = chan;
1935
1936         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1937                                      100 + ie_len);
1938         if (!skb)
1939                 return NULL;
1940
1941         rate_masks[chan->band] = ratemask;
1942         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1943                                            skb_tailroom(skb), &dummy_ie_desc,
1944                                            ie, ie_len, BIT(chan->band),
1945                                            rate_masks, &chandef, flags);
1946         skb_put(skb, ies_len);
1947
1948         if (dst) {
1949                 mgmt = (struct ieee80211_mgmt *) skb->data;
1950                 memcpy(mgmt->da, dst, ETH_ALEN);
1951                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1952         }
1953
1954         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1955
1956         return skb;
1957 }
1958
1959 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1960                             struct ieee802_11_elems *elems,
1961                             enum nl80211_band band, u32 *basic_rates)
1962 {
1963         struct ieee80211_supported_band *sband;
1964         size_t num_rates;
1965         u32 supp_rates, rate_flags;
1966         int i, j, shift;
1967
1968         sband = sdata->local->hw.wiphy->bands[band];
1969         if (WARN_ON(!sband))
1970                 return 1;
1971
1972         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1973         shift = ieee80211_vif_get_shift(&sdata->vif);
1974
1975         num_rates = sband->n_bitrates;
1976         supp_rates = 0;
1977         for (i = 0; i < elems->supp_rates_len +
1978                      elems->ext_supp_rates_len; i++) {
1979                 u8 rate = 0;
1980                 int own_rate;
1981                 bool is_basic;
1982                 if (i < elems->supp_rates_len)
1983                         rate = elems->supp_rates[i];
1984                 else if (elems->ext_supp_rates)
1985                         rate = elems->ext_supp_rates
1986                                 [i - elems->supp_rates_len];
1987                 own_rate = 5 * (rate & 0x7f);
1988                 is_basic = !!(rate & 0x80);
1989
1990                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1991                         continue;
1992
1993                 for (j = 0; j < num_rates; j++) {
1994                         int brate;
1995                         if ((rate_flags & sband->bitrates[j].flags)
1996                             != rate_flags)
1997                                 continue;
1998
1999                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2000                                              1 << shift);
2001
2002                         if (brate == own_rate) {
2003                                 supp_rates |= BIT(j);
2004                                 if (basic_rates && is_basic)
2005                                         *basic_rates |= BIT(j);
2006                         }
2007                 }
2008         }
2009         return supp_rates;
2010 }
2011
2012 void ieee80211_stop_device(struct ieee80211_local *local)
2013 {
2014         ieee80211_led_radio(local, false);
2015         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2016
2017         cancel_work_sync(&local->reconfig_filter);
2018
2019         flush_workqueue(local->workqueue);
2020         drv_stop(local);
2021 }
2022
2023 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2024                                            bool aborted)
2025 {
2026         /* It's possible that we don't handle the scan completion in
2027          * time during suspend, so if it's still marked as completed
2028          * here, queue the work and flush it to clean things up.
2029          * Instead of calling the worker function directly here, we
2030          * really queue it to avoid potential races with other flows
2031          * scheduling the same work.
2032          */
2033         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2034                 /* If coming from reconfiguration failure, abort the scan so
2035                  * we don't attempt to continue a partial HW scan - which is
2036                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2037                  * completed scan, and a 5 GHz portion is still pending.
2038                  */
2039                 if (aborted)
2040                         set_bit(SCAN_ABORTED, &local->scanning);
2041                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2042                 flush_delayed_work(&local->scan_work);
2043         }
2044 }
2045
2046 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2047 {
2048         struct ieee80211_sub_if_data *sdata;
2049         struct ieee80211_chanctx *ctx;
2050
2051         /*
2052          * We get here if during resume the device can't be restarted properly.
2053          * We might also get here if this happens during HW reset, which is a
2054          * slightly different situation and we need to drop all connections in
2055          * the latter case.
2056          *
2057          * Ask cfg80211 to turn off all interfaces, this will result in more
2058          * warnings but at least we'll then get into a clean stopped state.
2059          */
2060
2061         local->resuming = false;
2062         local->suspended = false;
2063         local->in_reconfig = false;
2064
2065         ieee80211_flush_completed_scan(local, true);
2066
2067         /* scheduled scan clearly can't be running any more, but tell
2068          * cfg80211 and clear local state
2069          */
2070         ieee80211_sched_scan_end(local);
2071
2072         list_for_each_entry(sdata, &local->interfaces, list)
2073                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2074
2075         /* Mark channel contexts as not being in the driver any more to avoid
2076          * removing them from the driver during the shutdown process...
2077          */
2078         mutex_lock(&local->chanctx_mtx);
2079         list_for_each_entry(ctx, &local->chanctx_list, list)
2080                 ctx->driver_present = false;
2081         mutex_unlock(&local->chanctx_mtx);
2082
2083         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2084 }
2085
2086 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2087                                      struct ieee80211_sub_if_data *sdata)
2088 {
2089         struct ieee80211_chanctx_conf *conf;
2090         struct ieee80211_chanctx *ctx;
2091
2092         if (!local->use_chanctx)
2093                 return;
2094
2095         mutex_lock(&local->chanctx_mtx);
2096         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2097                                          lockdep_is_held(&local->chanctx_mtx));
2098         if (conf) {
2099                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2100                 drv_assign_vif_chanctx(local, sdata, ctx);
2101         }
2102         mutex_unlock(&local->chanctx_mtx);
2103 }
2104
2105 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2106 {
2107         struct ieee80211_local *local = sdata->local;
2108         struct sta_info *sta;
2109
2110         /* add STAs back */
2111         mutex_lock(&local->sta_mtx);
2112         list_for_each_entry(sta, &local->sta_list, list) {
2113                 enum ieee80211_sta_state state;
2114
2115                 if (!sta->uploaded || sta->sdata != sdata)
2116                         continue;
2117
2118                 for (state = IEEE80211_STA_NOTEXIST;
2119                      state < sta->sta_state; state++)
2120                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2121                                               state + 1));
2122         }
2123         mutex_unlock(&local->sta_mtx);
2124 }
2125
2126 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2127 {
2128         struct cfg80211_nan_func *func, **funcs;
2129         int res, id, i = 0;
2130
2131         res = drv_start_nan(sdata->local, sdata,
2132                             &sdata->u.nan.conf);
2133         if (WARN_ON(res))
2134                 return res;
2135
2136         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2137                         sizeof(*funcs),
2138                         GFP_KERNEL);
2139         if (!funcs)
2140                 return -ENOMEM;
2141
2142         /* Add all the functions:
2143          * This is a little bit ugly. We need to call a potentially sleeping
2144          * callback for each NAN function, so we can't hold the spinlock.
2145          */
2146         spin_lock_bh(&sdata->u.nan.func_lock);
2147
2148         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2149                 funcs[i++] = func;
2150
2151         spin_unlock_bh(&sdata->u.nan.func_lock);
2152
2153         for (i = 0; funcs[i]; i++) {
2154                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2155                 if (WARN_ON(res))
2156                         ieee80211_nan_func_terminated(&sdata->vif,
2157                                                       funcs[i]->instance_id,
2158                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2159                                                       GFP_KERNEL);
2160         }
2161
2162         kfree(funcs);
2163
2164         return 0;
2165 }
2166
2167 int ieee80211_reconfig(struct ieee80211_local *local)
2168 {
2169         struct ieee80211_hw *hw = &local->hw;
2170         struct ieee80211_sub_if_data *sdata;
2171         struct ieee80211_chanctx *ctx;
2172         struct sta_info *sta;
2173         int res, i;
2174         bool reconfig_due_to_wowlan = false;
2175         struct ieee80211_sub_if_data *sched_scan_sdata;
2176         struct cfg80211_sched_scan_request *sched_scan_req;
2177         bool sched_scan_stopped = false;
2178         bool suspended = local->suspended;
2179
2180         /* nothing to do if HW shouldn't run */
2181         if (!local->open_count)
2182                 goto wake_up;
2183
2184 #ifdef CONFIG_PM
2185         if (suspended)
2186                 local->resuming = true;
2187
2188         if (local->wowlan) {
2189                 /*
2190                  * In the wowlan case, both mac80211 and the device
2191                  * are functional when the resume op is called, so
2192                  * clear local->suspended so the device could operate
2193                  * normally (e.g. pass rx frames).
2194                  */
2195                 local->suspended = false;
2196                 res = drv_resume(local);
2197                 local->wowlan = false;
2198                 if (res < 0) {
2199                         local->resuming = false;
2200                         return res;
2201                 }
2202                 if (res == 0)
2203                         goto wake_up;
2204                 WARN_ON(res > 1);
2205                 /*
2206                  * res is 1, which means the driver requested
2207                  * to go through a regular reset on wakeup.
2208                  * restore local->suspended in this case.
2209                  */
2210                 reconfig_due_to_wowlan = true;
2211                 local->suspended = true;
2212         }
2213 #endif
2214
2215         /*
2216          * In case of hw_restart during suspend (without wowlan),
2217          * cancel restart work, as we are reconfiguring the device
2218          * anyway.
2219          * Note that restart_work is scheduled on a frozen workqueue,
2220          * so we can't deadlock in this case.
2221          */
2222         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2223                 cancel_work_sync(&local->restart_work);
2224
2225         local->started = false;
2226
2227         /*
2228          * Upon resume hardware can sometimes be goofy due to
2229          * various platform / driver / bus issues, so restarting
2230          * the device may at times not work immediately. Propagate
2231          * the error.
2232          */
2233         res = drv_start(local);
2234         if (res) {
2235                 if (suspended)
2236                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2237                 else
2238                         WARN(1, "Hardware became unavailable during restart.\n");
2239                 ieee80211_handle_reconfig_failure(local);
2240                 return res;
2241         }
2242
2243         /* setup fragmentation threshold */
2244         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2245
2246         /* setup RTS threshold */
2247         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2248
2249         /* reset coverage class */
2250         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2251
2252         ieee80211_led_radio(local, true);
2253         ieee80211_mod_tpt_led_trig(local,
2254                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2255
2256         /* add interfaces */
2257         sdata = rtnl_dereference(local->monitor_sdata);
2258         if (sdata) {
2259                 /* in HW restart it exists already */
2260                 WARN_ON(local->resuming);
2261                 res = drv_add_interface(local, sdata);
2262                 if (WARN_ON(res)) {
2263                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2264                         synchronize_net();
2265                         kfree(sdata);
2266                 }
2267         }
2268
2269         list_for_each_entry(sdata, &local->interfaces, list) {
2270                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2271                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2272                     ieee80211_sdata_running(sdata)) {
2273                         res = drv_add_interface(local, sdata);
2274                         if (WARN_ON(res))
2275                                 break;
2276                 }
2277         }
2278
2279         /* If adding any of the interfaces failed above, roll back and
2280          * report failure.
2281          */
2282         if (res) {
2283                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2284                                                      list)
2285                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2286                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2287                             ieee80211_sdata_running(sdata))
2288                                 drv_remove_interface(local, sdata);
2289                 ieee80211_handle_reconfig_failure(local);
2290                 return res;
2291         }
2292
2293         /* add channel contexts */
2294         if (local->use_chanctx) {
2295                 mutex_lock(&local->chanctx_mtx);
2296                 list_for_each_entry(ctx, &local->chanctx_list, list)
2297                         if (ctx->replace_state !=
2298                             IEEE80211_CHANCTX_REPLACES_OTHER)
2299                                 WARN_ON(drv_add_chanctx(local, ctx));
2300                 mutex_unlock(&local->chanctx_mtx);
2301
2302                 sdata = rtnl_dereference(local->monitor_sdata);
2303                 if (sdata && ieee80211_sdata_running(sdata))
2304                         ieee80211_assign_chanctx(local, sdata);
2305         }
2306
2307         /* reconfigure hardware */
2308         ieee80211_hw_config(local, ~0);
2309
2310         ieee80211_configure_filter(local);
2311
2312         /* Finally also reconfigure all the BSS information */
2313         list_for_each_entry(sdata, &local->interfaces, list) {
2314                 u32 changed;
2315
2316                 if (!ieee80211_sdata_running(sdata))
2317                         continue;
2318
2319                 ieee80211_assign_chanctx(local, sdata);
2320
2321                 switch (sdata->vif.type) {
2322                 case NL80211_IFTYPE_AP_VLAN:
2323                 case NL80211_IFTYPE_MONITOR:
2324                         break;
2325                 case NL80211_IFTYPE_ADHOC:
2326                         if (sdata->vif.bss_conf.ibss_joined)
2327                                 WARN_ON(drv_join_ibss(local, sdata));
2328                         /* fall through */
2329                 default:
2330                         ieee80211_reconfig_stations(sdata);
2331                         /* fall through */
2332                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2333                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2334                                 drv_conf_tx(local, sdata, i,
2335                                             &sdata->tx_conf[i]);
2336                         break;
2337                 }
2338
2339                 /* common change flags for all interface types */
2340                 changed = BSS_CHANGED_ERP_CTS_PROT |
2341                           BSS_CHANGED_ERP_PREAMBLE |
2342                           BSS_CHANGED_ERP_SLOT |
2343                           BSS_CHANGED_HT |
2344                           BSS_CHANGED_BASIC_RATES |
2345                           BSS_CHANGED_BEACON_INT |
2346                           BSS_CHANGED_BSSID |
2347                           BSS_CHANGED_CQM |
2348                           BSS_CHANGED_QOS |
2349                           BSS_CHANGED_IDLE |
2350                           BSS_CHANGED_TXPOWER |
2351                           BSS_CHANGED_MCAST_RATE;
2352
2353                 if (sdata->vif.mu_mimo_owner)
2354                         changed |= BSS_CHANGED_MU_GROUPS;
2355
2356                 switch (sdata->vif.type) {
2357                 case NL80211_IFTYPE_STATION:
2358                         changed |= BSS_CHANGED_ASSOC |
2359                                    BSS_CHANGED_ARP_FILTER |
2360                                    BSS_CHANGED_PS;
2361
2362                         /* Re-send beacon info report to the driver */
2363                         if (sdata->u.mgd.have_beacon)
2364                                 changed |= BSS_CHANGED_BEACON_INFO;
2365
2366                         if (sdata->vif.bss_conf.max_idle_period ||
2367                             sdata->vif.bss_conf.protected_keep_alive)
2368                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2369
2370                         sdata_lock(sdata);
2371                         ieee80211_bss_info_change_notify(sdata, changed);
2372                         sdata_unlock(sdata);
2373                         break;
2374                 case NL80211_IFTYPE_OCB:
2375                         changed |= BSS_CHANGED_OCB;
2376                         ieee80211_bss_info_change_notify(sdata, changed);
2377                         break;
2378                 case NL80211_IFTYPE_ADHOC:
2379                         changed |= BSS_CHANGED_IBSS;
2380                         /* fall through */
2381                 case NL80211_IFTYPE_AP:
2382                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2383
2384                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2385                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2386                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2387                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2388
2389                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2390                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2391
2392                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2393                                         drv_start_ap(local, sdata);
2394                         }
2395
2396                         /* fall through */
2397                 case NL80211_IFTYPE_MESH_POINT:
2398                         if (sdata->vif.bss_conf.enable_beacon) {
2399                                 changed |= BSS_CHANGED_BEACON |
2400                                            BSS_CHANGED_BEACON_ENABLED;
2401                                 ieee80211_bss_info_change_notify(sdata, changed);
2402                         }
2403                         break;
2404                 case NL80211_IFTYPE_NAN:
2405                         res = ieee80211_reconfig_nan(sdata);
2406                         if (res < 0) {
2407                                 ieee80211_handle_reconfig_failure(local);
2408                                 return res;
2409                         }
2410                         break;
2411                 case NL80211_IFTYPE_WDS:
2412                 case NL80211_IFTYPE_AP_VLAN:
2413                 case NL80211_IFTYPE_MONITOR:
2414                 case NL80211_IFTYPE_P2P_DEVICE:
2415                         /* nothing to do */
2416                         break;
2417                 case NL80211_IFTYPE_UNSPECIFIED:
2418                 case NUM_NL80211_IFTYPES:
2419                 case NL80211_IFTYPE_P2P_CLIENT:
2420                 case NL80211_IFTYPE_P2P_GO:
2421                         WARN_ON(1);
2422                         break;
2423                 }
2424         }
2425
2426         ieee80211_recalc_ps(local);
2427
2428         /*
2429          * The sta might be in psm against the ap (e.g. because
2430          * this was the state before a hw restart), so we
2431          * explicitly send a null packet in order to make sure
2432          * it'll sync against the ap (and get out of psm).
2433          */
2434         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2435                 list_for_each_entry(sdata, &local->interfaces, list) {
2436                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2437                                 continue;
2438                         if (!sdata->u.mgd.associated)
2439                                 continue;
2440
2441                         ieee80211_send_nullfunc(local, sdata, false);
2442                 }
2443         }
2444
2445         /* APs are now beaconing, add back stations */
2446         mutex_lock(&local->sta_mtx);
2447         list_for_each_entry(sta, &local->sta_list, list) {
2448                 enum ieee80211_sta_state state;
2449
2450                 if (!sta->uploaded)
2451                         continue;
2452
2453                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2454                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2455                         continue;
2456
2457                 for (state = IEEE80211_STA_NOTEXIST;
2458                      state < sta->sta_state; state++)
2459                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2460                                               state + 1));
2461         }
2462         mutex_unlock(&local->sta_mtx);
2463
2464         /* add back keys */
2465         list_for_each_entry(sdata, &local->interfaces, list)
2466                 ieee80211_reenable_keys(sdata);
2467
2468         /* Reconfigure sched scan if it was interrupted by FW restart */
2469         mutex_lock(&local->mtx);
2470         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2471                                                 lockdep_is_held(&local->mtx));
2472         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2473                                                 lockdep_is_held(&local->mtx));
2474         if (sched_scan_sdata && sched_scan_req)
2475                 /*
2476                  * Sched scan stopped, but we don't want to report it. Instead,
2477                  * we're trying to reschedule. However, if more than one scan
2478                  * plan was set, we cannot reschedule since we don't know which
2479                  * scan plan was currently running (and some scan plans may have
2480                  * already finished).
2481                  */
2482                 if (sched_scan_req->n_scan_plans > 1 ||
2483                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2484                                                          sched_scan_req)) {
2485                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2486                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2487                         sched_scan_stopped = true;
2488                 }
2489         mutex_unlock(&local->mtx);
2490
2491         if (sched_scan_stopped)
2492                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2493
2494  wake_up:
2495
2496         if (local->monitors == local->open_count && local->monitors > 0)
2497                 ieee80211_add_virtual_monitor(local);
2498
2499         /*
2500          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2501          * sessions can be established after a resume.
2502          *
2503          * Also tear down aggregation sessions since reconfiguring
2504          * them in a hardware restart scenario is not easily done
2505          * right now, and the hardware will have lost information
2506          * about the sessions, but we and the AP still think they
2507          * are active. This is really a workaround though.
2508          */
2509         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2510                 mutex_lock(&local->sta_mtx);
2511
2512                 list_for_each_entry(sta, &local->sta_list, list) {
2513                         if (!local->resuming)
2514                                 ieee80211_sta_tear_down_BA_sessions(
2515                                                 sta, AGG_STOP_LOCAL_REQUEST);
2516                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2517                 }
2518
2519                 mutex_unlock(&local->sta_mtx);
2520         }
2521
2522         if (local->in_reconfig) {
2523                 local->in_reconfig = false;
2524                 barrier();
2525
2526                 /* Restart deferred ROCs */
2527                 mutex_lock(&local->mtx);
2528                 ieee80211_start_next_roc(local);
2529                 mutex_unlock(&local->mtx);
2530
2531                 /* Requeue all works */
2532                 list_for_each_entry(sdata, &local->interfaces, list)
2533                         ieee80211_queue_work(&local->hw, &sdata->work);
2534         }
2535
2536         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2537                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2538                                         false);
2539
2540         /*
2541          * If this is for hw restart things are still running.
2542          * We may want to change that later, however.
2543          */
2544         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2545                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2546
2547         if (!suspended)
2548                 return 0;
2549
2550 #ifdef CONFIG_PM
2551         /* first set suspended false, then resuming */
2552         local->suspended = false;
2553         mb();
2554         local->resuming = false;
2555
2556         ieee80211_flush_completed_scan(local, false);
2557
2558         if (local->open_count && !reconfig_due_to_wowlan)
2559                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2560
2561         list_for_each_entry(sdata, &local->interfaces, list) {
2562                 if (!ieee80211_sdata_running(sdata))
2563                         continue;
2564                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2565                         ieee80211_sta_restart(sdata);
2566         }
2567
2568         mod_timer(&local->sta_cleanup, jiffies + 1);
2569 #else
2570         WARN_ON(1);
2571 #endif
2572
2573         return 0;
2574 }
2575
2576 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2577 {
2578         struct ieee80211_sub_if_data *sdata;
2579         struct ieee80211_local *local;
2580         struct ieee80211_key *key;
2581
2582         if (WARN_ON(!vif))
2583                 return;
2584
2585         sdata = vif_to_sdata(vif);
2586         local = sdata->local;
2587
2588         if (WARN_ON(!local->resuming))
2589                 return;
2590
2591         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2592                 return;
2593
2594         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2595
2596         mutex_lock(&local->key_mtx);
2597         list_for_each_entry(key, &sdata->key_list, list)
2598                 key->flags |= KEY_FLAG_TAINTED;
2599         mutex_unlock(&local->key_mtx);
2600 }
2601 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2602
2603 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2604 {
2605         struct ieee80211_local *local = sdata->local;
2606         struct ieee80211_chanctx_conf *chanctx_conf;
2607         struct ieee80211_chanctx *chanctx;
2608
2609         mutex_lock(&local->chanctx_mtx);
2610
2611         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2612                                         lockdep_is_held(&local->chanctx_mtx));
2613
2614         /*
2615          * This function can be called from a work, thus it may be possible
2616          * that the chanctx_conf is removed (due to a disconnection, for
2617          * example).
2618          * So nothing should be done in such case.
2619          */
2620         if (!chanctx_conf)
2621                 goto unlock;
2622
2623         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2624         ieee80211_recalc_smps_chanctx(local, chanctx);
2625  unlock:
2626         mutex_unlock(&local->chanctx_mtx);
2627 }
2628
2629 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2630 {
2631         struct ieee80211_local *local = sdata->local;
2632         struct ieee80211_chanctx_conf *chanctx_conf;
2633         struct ieee80211_chanctx *chanctx;
2634
2635         mutex_lock(&local->chanctx_mtx);
2636
2637         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2638                                         lockdep_is_held(&local->chanctx_mtx));
2639
2640         if (WARN_ON_ONCE(!chanctx_conf))
2641                 goto unlock;
2642
2643         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2644         ieee80211_recalc_chanctx_min_def(local, chanctx);
2645  unlock:
2646         mutex_unlock(&local->chanctx_mtx);
2647 }
2648
2649 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2650 {
2651         size_t pos = offset;
2652
2653         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2654                 pos += 2 + ies[pos + 1];
2655
2656         return pos;
2657 }
2658
2659 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2660                                             int rssi_min_thold,
2661                                             int rssi_max_thold)
2662 {
2663         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2664
2665         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2666                 return;
2667
2668         /*
2669          * Scale up threshold values before storing it, as the RSSI averaging
2670          * algorithm uses a scaled up value as well. Change this scaling
2671          * factor if the RSSI averaging algorithm changes.
2672          */
2673         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2674         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2675 }
2676
2677 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2678                                     int rssi_min_thold,
2679                                     int rssi_max_thold)
2680 {
2681         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2682
2683         WARN_ON(rssi_min_thold == rssi_max_thold ||
2684                 rssi_min_thold > rssi_max_thold);
2685
2686         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2687                                        rssi_max_thold);
2688 }
2689 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2690
2691 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2692 {
2693         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2694
2695         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2696 }
2697 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2698
2699 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2700                               u16 cap)
2701 {
2702         __le16 tmp;
2703
2704         *pos++ = WLAN_EID_HT_CAPABILITY;
2705         *pos++ = sizeof(struct ieee80211_ht_cap);
2706         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2707
2708         /* capability flags */
2709         tmp = cpu_to_le16(cap);
2710         memcpy(pos, &tmp, sizeof(u16));
2711         pos += sizeof(u16);
2712
2713         /* AMPDU parameters */
2714         *pos++ = ht_cap->ampdu_factor |
2715                  (ht_cap->ampdu_density <<
2716                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2717
2718         /* MCS set */
2719         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2720         pos += sizeof(ht_cap->mcs);
2721
2722         /* extended capabilities */
2723         pos += sizeof(__le16);
2724
2725         /* BF capabilities */
2726         pos += sizeof(__le32);
2727
2728         /* antenna selection */
2729         pos += sizeof(u8);
2730
2731         return pos;
2732 }
2733
2734 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2735                                u32 cap)
2736 {
2737         __le32 tmp;
2738
2739         *pos++ = WLAN_EID_VHT_CAPABILITY;
2740         *pos++ = sizeof(struct ieee80211_vht_cap);
2741         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2742
2743         /* capability flags */
2744         tmp = cpu_to_le32(cap);
2745         memcpy(pos, &tmp, sizeof(u32));
2746         pos += sizeof(u32);
2747
2748         /* VHT MCS set */
2749         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2750         pos += sizeof(vht_cap->vht_mcs);
2751
2752         return pos;
2753 }
2754
2755 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2756 {
2757         const struct ieee80211_sta_he_cap *he_cap;
2758         struct ieee80211_supported_band *sband;
2759         u8 n;
2760
2761         sband = ieee80211_get_sband(sdata);
2762         if (!sband)
2763                 return 0;
2764
2765         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2766         if (!he_cap)
2767                 return 0;
2768
2769         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2770         return 2 + 1 +
2771                sizeof(he_cap->he_cap_elem) + n +
2772                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2773                                      he_cap->he_cap_elem.phy_cap_info);
2774 }
2775
2776 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2777                               const struct ieee80211_sta_he_cap *he_cap,
2778                               u8 *end)
2779 {
2780         u8 n;
2781         u8 ie_len;
2782         u8 *orig_pos = pos;
2783
2784         /* Make sure we have place for the IE */
2785         /*
2786          * TODO: the 1 added is because this temporarily is under the EXTENSION
2787          * IE. Get rid of it when it moves.
2788          */
2789         if (!he_cap)
2790                 return orig_pos;
2791
2792         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2793         ie_len = 2 + 1 +
2794                  sizeof(he_cap->he_cap_elem) + n +
2795                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2796                                        he_cap->he_cap_elem.phy_cap_info);
2797
2798         if ((end - pos) < ie_len)
2799                 return orig_pos;
2800
2801         *pos++ = WLAN_EID_EXTENSION;
2802         pos++; /* We'll set the size later below */
2803         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2804
2805         /* Fixed data */
2806         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2807         pos += sizeof(he_cap->he_cap_elem);
2808
2809         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2810         pos += n;
2811
2812         /* Check if PPE Threshold should be present */
2813         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2814              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2815                 goto end;
2816
2817         /*
2818          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2819          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2820          */
2821         n = hweight8(he_cap->ppe_thres[0] &
2822                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2823         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2824                    IEEE80211_PPE_THRES_NSS_POS));
2825
2826         /*
2827          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2828          * total size.
2829          */
2830         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2831         n = DIV_ROUND_UP(n, 8);
2832
2833         /* Copy PPE Thresholds */
2834         memcpy(pos, &he_cap->ppe_thres, n);
2835         pos += n;
2836
2837 end:
2838         orig_pos[1] = (pos - orig_pos) - 2;
2839         return pos;
2840 }
2841
2842 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2843                                     struct sk_buff *skb)
2844 {
2845         struct ieee80211_supported_band *sband;
2846         const struct ieee80211_sband_iftype_data *iftd;
2847         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2848         u8 *pos;
2849         u16 cap;
2850
2851         sband = ieee80211_get_sband(sdata);
2852         if (!sband)
2853                 return;
2854
2855         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2856         if (WARN_ON(!iftd))
2857                 return;
2858
2859         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2860         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2861
2862         switch (sdata->smps_mode) {
2863         case IEEE80211_SMPS_AUTOMATIC:
2864         case IEEE80211_SMPS_NUM_MODES:
2865                 WARN_ON(1);
2866                 /* fall through */
2867         case IEEE80211_SMPS_OFF:
2868                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2869                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2870                 break;
2871         case IEEE80211_SMPS_STATIC:
2872                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2873                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2874                 break;
2875         case IEEE80211_SMPS_DYNAMIC:
2876                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2877                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2878                 break;
2879         }
2880
2881         pos = skb_put(skb, 2 + 1 + sizeof(cap));
2882         *pos++ = WLAN_EID_EXTENSION;
2883         *pos++ = 1 + sizeof(cap);
2884         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
2885         put_unaligned_le16(cap, pos);
2886 }
2887
2888 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2889                                const struct cfg80211_chan_def *chandef,
2890                                u16 prot_mode, bool rifs_mode)
2891 {
2892         struct ieee80211_ht_operation *ht_oper;
2893         /* Build HT Information */
2894         *pos++ = WLAN_EID_HT_OPERATION;
2895         *pos++ = sizeof(struct ieee80211_ht_operation);
2896         ht_oper = (struct ieee80211_ht_operation *)pos;
2897         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2898                                         chandef->chan->center_freq);
2899         switch (chandef->width) {
2900         case NL80211_CHAN_WIDTH_160:
2901         case NL80211_CHAN_WIDTH_80P80:
2902         case NL80211_CHAN_WIDTH_80:
2903         case NL80211_CHAN_WIDTH_40:
2904                 if (chandef->center_freq1 > chandef->chan->center_freq)
2905                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2906                 else
2907                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2908                 break;
2909         default:
2910                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2911                 break;
2912         }
2913         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2914             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2915             chandef->width != NL80211_CHAN_WIDTH_20)
2916                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2917
2918         if (rifs_mode)
2919                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2920
2921         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2922         ht_oper->stbc_param = 0x0000;
2923
2924         /* It seems that Basic MCS set and Supported MCS set
2925            are identical for the first 10 bytes */
2926         memset(&ht_oper->basic_set, 0, 16);
2927         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2928
2929         return pos + sizeof(struct ieee80211_ht_operation);
2930 }
2931
2932 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2933                                    const struct cfg80211_chan_def *chandef)
2934 {
2935         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2936         *pos++ = 3;                                     /* IE length */
2937         /* New channel width */
2938         switch (chandef->width) {
2939         case NL80211_CHAN_WIDTH_80:
2940                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2941                 break;
2942         case NL80211_CHAN_WIDTH_160:
2943                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2944                 break;
2945         case NL80211_CHAN_WIDTH_80P80:
2946                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2947                 break;
2948         default:
2949                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2950         }
2951
2952         /* new center frequency segment 0 */
2953         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2954         /* new center frequency segment 1 */
2955         if (chandef->center_freq2)
2956                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2957         else
2958                 *pos++ = 0;
2959 }
2960
2961 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2962                                 const struct cfg80211_chan_def *chandef)
2963 {
2964         struct ieee80211_vht_operation *vht_oper;
2965
2966         *pos++ = WLAN_EID_VHT_OPERATION;
2967         *pos++ = sizeof(struct ieee80211_vht_operation);
2968         vht_oper = (struct ieee80211_vht_operation *)pos;
2969         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2970                                                         chandef->center_freq1);
2971         if (chandef->center_freq2)
2972                 vht_oper->center_freq_seg1_idx =
2973                         ieee80211_frequency_to_channel(chandef->center_freq2);
2974         else
2975                 vht_oper->center_freq_seg1_idx = 0x00;
2976
2977         switch (chandef->width) {
2978         case NL80211_CHAN_WIDTH_160:
2979                 /*
2980                  * Convert 160 MHz channel width to new style as interop
2981                  * workaround.
2982                  */
2983                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2984                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2985                 if (chandef->chan->center_freq < chandef->center_freq1)
2986                         vht_oper->center_freq_seg0_idx -= 8;
2987                 else
2988                         vht_oper->center_freq_seg0_idx += 8;
2989                 break;
2990         case NL80211_CHAN_WIDTH_80P80:
2991                 /*
2992                  * Convert 80+80 MHz channel width to new style as interop
2993                  * workaround.
2994                  */
2995                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2996                 break;
2997         case NL80211_CHAN_WIDTH_80:
2998                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2999                 break;
3000         default:
3001                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3002                 break;
3003         }
3004
3005         /* don't require special VHT peer rates */
3006         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3007
3008         return pos + sizeof(struct ieee80211_vht_operation);
3009 }
3010
3011 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3012 {
3013         struct ieee80211_he_operation *he_oper;
3014         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3015         u32 he_oper_params;
3016         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3017
3018         if (chandef->chan->band == NL80211_BAND_6GHZ)
3019                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3020
3021         *pos++ = WLAN_EID_EXTENSION;
3022         *pos++ = ie_len;
3023         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3024
3025         he_oper_params = 0;
3026         he_oper_params |= u32_encode_bits(1023, /* disabled */
3027                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3028         he_oper_params |= u32_encode_bits(1,
3029                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3030         he_oper_params |= u32_encode_bits(1,
3031                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3032         if (chandef->chan->band == NL80211_BAND_6GHZ)
3033                 he_oper_params |= u32_encode_bits(1,
3034                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3035
3036         he_oper = (struct ieee80211_he_operation *)pos;
3037         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3038
3039         /* don't require special HE peer rates */
3040         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3041         pos += sizeof(struct ieee80211_he_operation);
3042
3043         if (chandef->chan->band != NL80211_BAND_6GHZ)
3044                 goto out;
3045
3046         /* TODO add VHT operational */
3047         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3048         he_6ghz_op->minrate = 6; /* 6 Mbps */
3049         he_6ghz_op->primary =
3050                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3051         he_6ghz_op->ccfs0 =
3052                 ieee80211_frequency_to_channel(chandef->center_freq1);
3053         if (chandef->center_freq2)
3054                 he_6ghz_op->ccfs1 =
3055                         ieee80211_frequency_to_channel(chandef->center_freq2);
3056         else
3057                 he_6ghz_op->ccfs1 = 0;
3058
3059         switch (chandef->width) {
3060         case NL80211_CHAN_WIDTH_160:
3061                 /* Convert 160 MHz channel width to new style as interop
3062                  * workaround.
3063                  */
3064                 he_6ghz_op->control =
3065                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3066                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3067                 if (chandef->chan->center_freq < chandef->center_freq1)
3068                         he_6ghz_op->ccfs0 -= 8;
3069                 else
3070                         he_6ghz_op->ccfs0 += 8;
3071                 fallthrough;
3072         case NL80211_CHAN_WIDTH_80P80:
3073                 he_6ghz_op->control =
3074                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3075                 break;
3076         case NL80211_CHAN_WIDTH_80:
3077                 he_6ghz_op->control =
3078                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3079                 break;
3080         case NL80211_CHAN_WIDTH_40:
3081                 he_6ghz_op->control =
3082                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3083                 break;
3084         default:
3085                 he_6ghz_op->control =
3086                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3087                 break;
3088         }
3089
3090         pos += sizeof(struct ieee80211_he_6ghz_oper);
3091
3092 out:
3093         return pos;
3094 }
3095
3096 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3097                                struct cfg80211_chan_def *chandef)
3098 {
3099         enum nl80211_channel_type channel_type;
3100
3101         if (!ht_oper)
3102                 return false;
3103
3104         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3105         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3106                 channel_type = NL80211_CHAN_HT20;
3107                 break;
3108         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3109                 channel_type = NL80211_CHAN_HT40PLUS;
3110                 break;
3111         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3112                 channel_type = NL80211_CHAN_HT40MINUS;
3113                 break;
3114         default:
3115                 channel_type = NL80211_CHAN_NO_HT;
3116                 return false;
3117         }
3118
3119         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3120         return true;
3121 }
3122
3123 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3124                                 const struct ieee80211_vht_operation *oper,
3125                                 const struct ieee80211_ht_operation *htop,
3126                                 struct cfg80211_chan_def *chandef)
3127 {
3128         struct cfg80211_chan_def new = *chandef;
3129         int cf0, cf1;
3130         int ccfs0, ccfs1, ccfs2;
3131         int ccf0, ccf1;
3132         u32 vht_cap;
3133         bool support_80_80 = false;
3134         bool support_160 = false;
3135
3136         if (!oper || !htop)
3137                 return false;
3138
3139         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3140         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3141                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3142         support_80_80 = ((vht_cap &
3143                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3144                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3145                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3146                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3147                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3148         ccfs0 = oper->center_freq_seg0_idx;
3149         ccfs1 = oper->center_freq_seg1_idx;
3150         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3151                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3152                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3153
3154         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3155         ccf0 = ccfs0;
3156         ccf1 = ccfs1;
3157         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3158                 ccf1 = ccfs2;
3159
3160         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3161         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3162
3163         switch (oper->chan_width) {
3164         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3165                 /* just use HT information directly */
3166                 break;
3167         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3168                 new.width = NL80211_CHAN_WIDTH_80;
3169                 new.center_freq1 = cf0;
3170                 /* If needed, adjust based on the newer interop workaround. */
3171                 if (ccf1) {
3172                         unsigned int diff;
3173
3174                         diff = abs(ccf1 - ccf0);
3175                         if ((diff == 8) && support_160) {
3176                                 new.width = NL80211_CHAN_WIDTH_160;
3177                                 new.center_freq1 = cf1;
3178                         } else if ((diff > 8) && support_80_80) {
3179                                 new.width = NL80211_CHAN_WIDTH_80P80;
3180                                 new.center_freq2 = cf1;
3181                         }
3182                 }
3183                 break;
3184         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3185                 /* deprecated encoding */
3186                 new.width = NL80211_CHAN_WIDTH_160;
3187                 new.center_freq1 = cf0;
3188                 break;
3189         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3190                 /* deprecated encoding */
3191                 new.width = NL80211_CHAN_WIDTH_80P80;
3192                 new.center_freq1 = cf0;
3193                 new.center_freq2 = cf1;
3194                 break;
3195         default:
3196                 return false;
3197         }
3198
3199         if (!cfg80211_chandef_valid(&new))
3200                 return false;
3201
3202         *chandef = new;
3203         return true;
3204 }
3205
3206 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3207                              const struct ieee80211_supported_band *sband,
3208                              const u8 *srates, int srates_len, u32 *rates)
3209 {
3210         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3211         int shift = ieee80211_chandef_get_shift(chandef);
3212         struct ieee80211_rate *br;
3213         int brate, rate, i, j, count = 0;
3214
3215         *rates = 0;
3216
3217         for (i = 0; i < srates_len; i++) {
3218                 rate = srates[i] & 0x7f;
3219
3220                 for (j = 0; j < sband->n_bitrates; j++) {
3221                         br = &sband->bitrates[j];
3222                         if ((rate_flags & br->flags) != rate_flags)
3223                                 continue;
3224
3225                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3226                         if (brate == rate) {
3227                                 *rates |= BIT(j);
3228                                 count++;
3229                                 break;
3230                         }
3231                 }
3232         }
3233         return count;
3234 }
3235
3236 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3237                             struct sk_buff *skb, bool need_basic,
3238                             enum nl80211_band band)
3239 {
3240         struct ieee80211_local *local = sdata->local;
3241         struct ieee80211_supported_band *sband;
3242         int rate, shift;
3243         u8 i, rates, *pos;
3244         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3245         u32 rate_flags;
3246
3247         shift = ieee80211_vif_get_shift(&sdata->vif);
3248         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3249         sband = local->hw.wiphy->bands[band];
3250         rates = 0;
3251         for (i = 0; i < sband->n_bitrates; i++) {
3252                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3253                         continue;
3254                 rates++;
3255         }
3256         if (rates > 8)
3257                 rates = 8;
3258
3259         if (skb_tailroom(skb) < rates + 2)
3260                 return -ENOMEM;
3261
3262         pos = skb_put(skb, rates + 2);
3263         *pos++ = WLAN_EID_SUPP_RATES;
3264         *pos++ = rates;
3265         for (i = 0; i < rates; i++) {
3266                 u8 basic = 0;
3267                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3268                         continue;
3269
3270                 if (need_basic && basic_rates & BIT(i))
3271                         basic = 0x80;
3272                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3273                                     5 * (1 << shift));
3274                 *pos++ = basic | (u8) rate;
3275         }
3276
3277         return 0;
3278 }
3279
3280 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3281                                 struct sk_buff *skb, bool need_basic,
3282                                 enum nl80211_band band)
3283 {
3284         struct ieee80211_local *local = sdata->local;
3285         struct ieee80211_supported_band *sband;
3286         int rate, shift;
3287         u8 i, exrates, *pos;
3288         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3289         u32 rate_flags;
3290
3291         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3292         shift = ieee80211_vif_get_shift(&sdata->vif);
3293
3294         sband = local->hw.wiphy->bands[band];
3295         exrates = 0;
3296         for (i = 0; i < sband->n_bitrates; i++) {
3297                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3298                         continue;
3299                 exrates++;
3300         }
3301
3302         if (exrates > 8)
3303                 exrates -= 8;
3304         else
3305                 exrates = 0;
3306
3307         if (skb_tailroom(skb) < exrates + 2)
3308                 return -ENOMEM;
3309
3310         if (exrates) {
3311                 pos = skb_put(skb, exrates + 2);
3312                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3313                 *pos++ = exrates;
3314                 for (i = 8; i < sband->n_bitrates; i++) {
3315                         u8 basic = 0;
3316                         if ((rate_flags & sband->bitrates[i].flags)
3317                             != rate_flags)
3318                                 continue;
3319                         if (need_basic && basic_rates & BIT(i))
3320                                 basic = 0x80;
3321                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3322                                             5 * (1 << shift));
3323                         *pos++ = basic | (u8) rate;
3324                 }
3325         }
3326         return 0;
3327 }
3328
3329 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3330 {
3331         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3332         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3333
3334         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3335                 /* non-managed type inferfaces */
3336                 return 0;
3337         }
3338         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3339 }
3340 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3341
3342 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3343 {
3344         if (!mcs)
3345                 return 1;
3346
3347         /* TODO: consider rx_highest */
3348
3349         if (mcs->rx_mask[3])
3350                 return 4;
3351         if (mcs->rx_mask[2])
3352                 return 3;
3353         if (mcs->rx_mask[1])
3354                 return 2;
3355         return 1;
3356 }
3357
3358 /**
3359  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3360  * @local: mac80211 hw info struct
3361  * @status: RX status
3362  * @mpdu_len: total MPDU length (including FCS)
3363  * @mpdu_offset: offset into MPDU to calculate timestamp at
3364  *
3365  * This function calculates the RX timestamp at the given MPDU offset, taking
3366  * into account what the RX timestamp was. An offset of 0 will just normalize
3367  * the timestamp to TSF at beginning of MPDU reception.
3368  */
3369 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3370                                      struct ieee80211_rx_status *status,
3371                                      unsigned int mpdu_len,
3372                                      unsigned int mpdu_offset)
3373 {
3374         u64 ts = status->mactime;
3375         struct rate_info ri;
3376         u16 rate;
3377
3378         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3379                 return 0;
3380
3381         memset(&ri, 0, sizeof(ri));
3382
3383         ri.bw = status->bw;
3384
3385         /* Fill cfg80211 rate info */
3386         switch (status->encoding) {
3387         case RX_ENC_HT:
3388                 ri.mcs = status->rate_idx;
3389                 ri.flags |= RATE_INFO_FLAGS_MCS;
3390                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3391                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3392                 break;
3393         case RX_ENC_VHT:
3394                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3395                 ri.mcs = status->rate_idx;
3396                 ri.nss = status->nss;
3397                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3398                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3399                 break;
3400         default:
3401                 WARN_ON(1);
3402                 /* fall through */
3403         case RX_ENC_LEGACY: {
3404                 struct ieee80211_supported_band *sband;
3405                 int shift = 0;
3406                 int bitrate;
3407
3408                 switch (status->bw) {
3409                 case RATE_INFO_BW_10:
3410                         shift = 1;
3411                         break;
3412                 case RATE_INFO_BW_5:
3413                         shift = 2;
3414                         break;
3415                 }
3416
3417                 sband = local->hw.wiphy->bands[status->band];
3418                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3419                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3420
3421                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3422                         /* TODO: handle HT/VHT preambles */
3423                         if (status->band == NL80211_BAND_5GHZ) {
3424                                 ts += 20 << shift;
3425                                 mpdu_offset += 2;
3426                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3427                                 ts += 96;
3428                         } else {
3429                                 ts += 192;
3430                         }
3431                 }
3432                 break;
3433                 }
3434         }
3435
3436         rate = cfg80211_calculate_bitrate(&ri);
3437         if (WARN_ONCE(!rate,
3438                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3439                       (unsigned long long)status->flag, status->rate_idx,
3440                       status->nss))
3441                 return 0;
3442
3443         /* rewind from end of MPDU */
3444         if (status->flag & RX_FLAG_MACTIME_END)
3445                 ts -= mpdu_len * 8 * 10 / rate;
3446
3447         ts += mpdu_offset * 8 * 10 / rate;
3448
3449         return ts;
3450 }
3451
3452 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3453 {
3454         struct ieee80211_sub_if_data *sdata;
3455         struct cfg80211_chan_def chandef;
3456
3457         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3458         ASSERT_RTNL();
3459
3460         mutex_lock(&local->mtx);
3461         list_for_each_entry(sdata, &local->interfaces, list) {
3462                 /* it might be waiting for the local->mtx, but then
3463                  * by the time it gets it, sdata->wdev.cac_started
3464                  * will no longer be true
3465                  */
3466                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3467
3468                 if (sdata->wdev.cac_started) {
3469                         chandef = sdata->vif.bss_conf.chandef;
3470                         ieee80211_vif_release_channel(sdata);
3471                         cfg80211_cac_event(sdata->dev,
3472                                            &chandef,
3473                                            NL80211_RADAR_CAC_ABORTED,
3474                                            GFP_KERNEL);
3475                 }
3476         }
3477         mutex_unlock(&local->mtx);
3478 }
3479
3480 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3481 {
3482         struct ieee80211_local *local =
3483                 container_of(work, struct ieee80211_local, radar_detected_work);
3484         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3485         struct ieee80211_chanctx *ctx;
3486         int num_chanctx = 0;
3487
3488         mutex_lock(&local->chanctx_mtx);
3489         list_for_each_entry(ctx, &local->chanctx_list, list) {
3490                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3491                         continue;
3492
3493                 num_chanctx++;
3494                 chandef = ctx->conf.def;
3495         }
3496         mutex_unlock(&local->chanctx_mtx);
3497
3498         rtnl_lock();
3499         ieee80211_dfs_cac_cancel(local);
3500         rtnl_unlock();
3501
3502         if (num_chanctx > 1)
3503                 /* XXX: multi-channel is not supported yet */
3504                 WARN_ON(1);
3505         else
3506                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3507 }
3508
3509 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3510 {
3511         struct ieee80211_local *local = hw_to_local(hw);
3512
3513         trace_api_radar_detected(local);
3514
3515         schedule_work(&local->radar_detected_work);
3516 }
3517 EXPORT_SYMBOL(ieee80211_radar_detected);
3518
3519 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3520 {
3521         u32 ret;
3522         int tmp;
3523
3524         switch (c->width) {
3525         case NL80211_CHAN_WIDTH_20:
3526                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3527                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3528                 break;
3529         case NL80211_CHAN_WIDTH_40:
3530                 c->width = NL80211_CHAN_WIDTH_20;
3531                 c->center_freq1 = c->chan->center_freq;
3532                 ret = IEEE80211_STA_DISABLE_40MHZ |
3533                       IEEE80211_STA_DISABLE_VHT;
3534                 break;
3535         case NL80211_CHAN_WIDTH_80:
3536                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3537                 /* n_P40 */
3538                 tmp /= 2;
3539                 /* freq_P40 */
3540                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3541                 c->width = NL80211_CHAN_WIDTH_40;
3542                 ret = IEEE80211_STA_DISABLE_VHT;
3543                 break;
3544         case NL80211_CHAN_WIDTH_80P80:
3545                 c->center_freq2 = 0;
3546                 c->width = NL80211_CHAN_WIDTH_80;
3547                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3548                       IEEE80211_STA_DISABLE_160MHZ;
3549                 break;
3550         case NL80211_CHAN_WIDTH_160:
3551                 /* n_P20 */
3552                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3553                 /* n_P80 */
3554                 tmp /= 4;
3555                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3556                 c->width = NL80211_CHAN_WIDTH_80;
3557                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3558                       IEEE80211_STA_DISABLE_160MHZ;
3559                 break;
3560         default:
3561         case NL80211_CHAN_WIDTH_20_NOHT:
3562                 WARN_ON_ONCE(1);
3563                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3564                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3565                 break;
3566         case NL80211_CHAN_WIDTH_5:
3567         case NL80211_CHAN_WIDTH_10:
3568                 WARN_ON_ONCE(1);
3569                 /* keep c->width */
3570                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3571                 break;
3572         }
3573
3574         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3575
3576         return ret;
3577 }
3578
3579 /*
3580  * Returns true if smps_mode_new is strictly more restrictive than
3581  * smps_mode_old.
3582  */
3583 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3584                                    enum ieee80211_smps_mode smps_mode_new)
3585 {
3586         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3587                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3588                 return false;
3589
3590         switch (smps_mode_old) {
3591         case IEEE80211_SMPS_STATIC:
3592                 return false;
3593         case IEEE80211_SMPS_DYNAMIC:
3594                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3595         case IEEE80211_SMPS_OFF:
3596                 return smps_mode_new != IEEE80211_SMPS_OFF;
3597         default:
3598                 WARN_ON(1);
3599         }
3600
3601         return false;
3602 }
3603
3604 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3605                               struct cfg80211_csa_settings *csa_settings)
3606 {
3607         struct sk_buff *skb;
3608         struct ieee80211_mgmt *mgmt;
3609         struct ieee80211_local *local = sdata->local;
3610         int freq;
3611         int hdr_len = offsetofend(struct ieee80211_mgmt,
3612                                   u.action.u.chan_switch);
3613         u8 *pos;
3614
3615         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3616             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3617                 return -EOPNOTSUPP;
3618
3619         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3620                             5 + /* channel switch announcement element */
3621                             3 + /* secondary channel offset element */
3622                             5 + /* wide bandwidth channel switch announcement */
3623                             8); /* mesh channel switch parameters element */
3624         if (!skb)
3625                 return -ENOMEM;
3626
3627         skb_reserve(skb, local->tx_headroom);
3628         mgmt = skb_put_zero(skb, hdr_len);
3629         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3630                                           IEEE80211_STYPE_ACTION);
3631
3632         eth_broadcast_addr(mgmt->da);
3633         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3634         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3635                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3636         } else {
3637                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3638                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3639         }
3640         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3641         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3642         pos = skb_put(skb, 5);
3643         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3644         *pos++ = 3;                                             /* IE length */
3645         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3646         freq = csa_settings->chandef.chan->center_freq;
3647         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3648         *pos++ = csa_settings->count;                           /* count */
3649
3650         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3651                 enum nl80211_channel_type ch_type;
3652
3653                 skb_put(skb, 3);
3654                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3655                 *pos++ = 1;                                     /* IE length */
3656                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3657                 if (ch_type == NL80211_CHAN_HT40PLUS)
3658                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3659                 else
3660                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3661         }
3662
3663         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3664                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3665
3666                 skb_put(skb, 8);
3667                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3668                 *pos++ = 6;                                     /* IE length */
3669                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3670                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3671                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3672                 *pos++ |= csa_settings->block_tx ?
3673                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3674                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3675                 pos += 2;
3676                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3677                 pos += 2;
3678         }
3679
3680         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3681             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3682             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3683                 skb_put(skb, 5);
3684                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3685         }
3686
3687         ieee80211_tx_skb(sdata, skb);
3688         return 0;
3689 }
3690
3691 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3692 {
3693         return !(cs == NULL || cs->cipher == 0 ||
3694                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3695                  cs->hdr_len <= cs->key_idx_off ||
3696                  cs->key_idx_shift > 7 ||
3697                  cs->key_idx_mask == 0);
3698 }
3699
3700 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3701 {
3702         int i;
3703
3704         /* Ensure we have enough iftype bitmap space for all iftype values */
3705         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3706
3707         for (i = 0; i < n; i++)
3708                 if (!ieee80211_cs_valid(&cs[i]))
3709                         return false;
3710
3711         return true;
3712 }
3713
3714 const struct ieee80211_cipher_scheme *
3715 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3716                  enum nl80211_iftype iftype)
3717 {
3718         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3719         int n = local->hw.n_cipher_schemes;
3720         int i;
3721         const struct ieee80211_cipher_scheme *cs = NULL;
3722
3723         for (i = 0; i < n; i++) {
3724                 if (l[i].cipher == cipher) {
3725                         cs = &l[i];
3726                         break;
3727                 }
3728         }
3729
3730         if (!cs || !(cs->iftype & BIT(iftype)))
3731                 return NULL;
3732
3733         return cs;
3734 }
3735
3736 int ieee80211_cs_headroom(struct ieee80211_local *local,
3737                           struct cfg80211_crypto_settings *crypto,
3738                           enum nl80211_iftype iftype)
3739 {
3740         const struct ieee80211_cipher_scheme *cs;
3741         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3742         int i;
3743
3744         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3745                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3746                                       iftype);
3747
3748                 if (cs && headroom < cs->hdr_len)
3749                         headroom = cs->hdr_len;
3750         }
3751
3752         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3753         if (cs && headroom < cs->hdr_len)
3754                 headroom = cs->hdr_len;
3755
3756         return headroom;
3757 }
3758
3759 static bool
3760 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3761 {
3762         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3763         int skip;
3764
3765         if (end > 0)
3766                 return false;
3767
3768         /* One shot NOA  */
3769         if (data->count[i] == 1)
3770                 return false;
3771
3772         if (data->desc[i].interval == 0)
3773                 return false;
3774
3775         /* End time is in the past, check for repetitions */
3776         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3777         if (data->count[i] < 255) {
3778                 if (data->count[i] <= skip) {
3779                         data->count[i] = 0;
3780                         return false;
3781                 }
3782
3783                 data->count[i] -= skip;
3784         }
3785
3786         data->desc[i].start += skip * data->desc[i].interval;
3787
3788         return true;
3789 }
3790
3791 static bool
3792 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3793                              s32 *offset)
3794 {
3795         bool ret = false;
3796         int i;
3797
3798         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3799                 s32 cur;
3800
3801                 if (!data->count[i])
3802                         continue;
3803
3804                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3805                         ret = true;
3806
3807                 cur = data->desc[i].start - tsf;
3808                 if (cur > *offset)
3809                         continue;
3810
3811                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3812                 if (cur > *offset)
3813                         *offset = cur;
3814         }
3815
3816         return ret;
3817 }
3818
3819 static u32
3820 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3821 {
3822         s32 offset = 0;
3823         int tries = 0;
3824         /*
3825          * arbitrary limit, used to avoid infinite loops when combined NoA
3826          * descriptors cover the full time period.
3827          */
3828         int max_tries = 5;
3829
3830         ieee80211_extend_absent_time(data, tsf, &offset);
3831         do {
3832                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3833                         break;
3834
3835                 tries++;
3836         } while (tries < max_tries);
3837
3838         return offset;
3839 }
3840
3841 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3842 {
3843         u32 next_offset = BIT(31) - 1;
3844         int i;
3845
3846         data->absent = 0;
3847         data->has_next_tsf = false;
3848         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3849                 s32 start;
3850
3851                 if (!data->count[i])
3852                         continue;
3853
3854                 ieee80211_extend_noa_desc(data, tsf, i);
3855                 start = data->desc[i].start - tsf;
3856                 if (start <= 0)
3857                         data->absent |= BIT(i);
3858
3859                 if (next_offset > start)
3860                         next_offset = start;
3861
3862                 data->has_next_tsf = true;
3863         }
3864
3865         if (data->absent)
3866                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3867
3868         data->next_tsf = tsf + next_offset;
3869 }
3870 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3871
3872 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3873                             struct ieee80211_noa_data *data, u32 tsf)
3874 {
3875         int ret = 0;
3876         int i;
3877
3878         memset(data, 0, sizeof(*data));
3879
3880         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3881                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3882
3883                 if (!desc->count || !desc->duration)
3884                         continue;
3885
3886                 data->count[i] = desc->count;
3887                 data->desc[i].start = le32_to_cpu(desc->start_time);
3888                 data->desc[i].duration = le32_to_cpu(desc->duration);
3889                 data->desc[i].interval = le32_to_cpu(desc->interval);
3890
3891                 if (data->count[i] > 1 &&
3892                     data->desc[i].interval < data->desc[i].duration)
3893                         continue;
3894
3895                 ieee80211_extend_noa_desc(data, tsf, i);
3896                 ret++;
3897         }
3898
3899         if (ret)
3900                 ieee80211_update_p2p_noa(data, tsf);
3901
3902         return ret;
3903 }
3904 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3905
3906 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3907                            struct ieee80211_sub_if_data *sdata)
3908 {
3909         u64 tsf = drv_get_tsf(local, sdata);
3910         u64 dtim_count = 0;
3911         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3912         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3913         struct ps_data *ps;
3914         u8 bcns_from_dtim;
3915
3916         if (tsf == -1ULL || !beacon_int || !dtim_period)
3917                 return;
3918
3919         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3920             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3921                 if (!sdata->bss)
3922                         return;
3923
3924                 ps = &sdata->bss->ps;
3925         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3926                 ps = &sdata->u.mesh.ps;
3927         } else {
3928                 return;
3929         }
3930
3931         /*
3932          * actually finds last dtim_count, mac80211 will update in
3933          * __beacon_add_tim().
3934          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3935          */
3936         do_div(tsf, beacon_int);
3937         bcns_from_dtim = do_div(tsf, dtim_period);
3938         /* just had a DTIM */
3939         if (!bcns_from_dtim)
3940                 dtim_count = 0;
3941         else
3942                 dtim_count = dtim_period - bcns_from_dtim;
3943
3944         ps->dtim_count = dtim_count;
3945 }
3946
3947 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3948                                          struct ieee80211_chanctx *ctx)
3949 {
3950         struct ieee80211_sub_if_data *sdata;
3951         u8 radar_detect = 0;
3952
3953         lockdep_assert_held(&local->chanctx_mtx);
3954
3955         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3956                 return 0;
3957
3958         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3959                 if (sdata->reserved_radar_required)
3960                         radar_detect |= BIT(sdata->reserved_chandef.width);
3961
3962         /*
3963          * An in-place reservation context should not have any assigned vifs
3964          * until it replaces the other context.
3965          */
3966         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3967                 !list_empty(&ctx->assigned_vifs));
3968
3969         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3970                 if (sdata->radar_required)
3971                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3972
3973         return radar_detect;
3974 }
3975
3976 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3977                                  const struct cfg80211_chan_def *chandef,
3978                                  enum ieee80211_chanctx_mode chanmode,
3979                                  u8 radar_detect)
3980 {
3981         struct ieee80211_local *local = sdata->local;
3982         struct ieee80211_sub_if_data *sdata_iter;
3983         enum nl80211_iftype iftype = sdata->wdev.iftype;
3984         struct ieee80211_chanctx *ctx;
3985         int total = 1;
3986         struct iface_combination_params params = {
3987                 .radar_detect = radar_detect,
3988         };
3989
3990         lockdep_assert_held(&local->chanctx_mtx);
3991
3992         if (WARN_ON(hweight32(radar_detect) > 1))
3993                 return -EINVAL;
3994
3995         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3996                     !chandef->chan))
3997                 return -EINVAL;
3998
3999         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4000                 return -EINVAL;
4001
4002         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4003             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4004                 /*
4005                  * always passing this is harmless, since it'll be the
4006                  * same value that cfg80211 finds if it finds the same
4007                  * interface ... and that's always allowed
4008                  */
4009                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4010         }
4011
4012         /* Always allow software iftypes */
4013         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4014                 if (radar_detect)
4015                         return -EINVAL;
4016                 return 0;
4017         }
4018
4019         if (chandef)
4020                 params.num_different_channels = 1;
4021
4022         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4023                 params.iftype_num[iftype] = 1;
4024
4025         list_for_each_entry(ctx, &local->chanctx_list, list) {
4026                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4027                         continue;
4028                 params.radar_detect |=
4029                         ieee80211_chanctx_radar_detect(local, ctx);
4030                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4031                         params.num_different_channels++;
4032                         continue;
4033                 }
4034                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4035                     cfg80211_chandef_compatible(chandef,
4036                                                 &ctx->conf.def))
4037                         continue;
4038                 params.num_different_channels++;
4039         }
4040
4041         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4042                 struct wireless_dev *wdev_iter;
4043
4044                 wdev_iter = &sdata_iter->wdev;
4045
4046                 if (sdata_iter == sdata ||
4047                     !ieee80211_sdata_running(sdata_iter) ||
4048                     cfg80211_iftype_allowed(local->hw.wiphy,
4049                                             wdev_iter->iftype, 0, 1))
4050                         continue;
4051
4052                 params.iftype_num[wdev_iter->iftype]++;
4053                 total++;
4054         }
4055
4056         if (total == 1 && !params.radar_detect)
4057                 return 0;
4058
4059         return cfg80211_check_combinations(local->hw.wiphy, &params);
4060 }
4061
4062 static void
4063 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4064                          void *data)
4065 {
4066         u32 *max_num_different_channels = data;
4067
4068         *max_num_different_channels = max(*max_num_different_channels,
4069                                           c->num_different_channels);
4070 }
4071
4072 int ieee80211_max_num_channels(struct ieee80211_local *local)
4073 {
4074         struct ieee80211_sub_if_data *sdata;
4075         struct ieee80211_chanctx *ctx;
4076         u32 max_num_different_channels = 1;
4077         int err;
4078         struct iface_combination_params params = {0};
4079
4080         lockdep_assert_held(&local->chanctx_mtx);
4081
4082         list_for_each_entry(ctx, &local->chanctx_list, list) {
4083                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4084                         continue;
4085
4086                 params.num_different_channels++;
4087
4088                 params.radar_detect |=
4089                         ieee80211_chanctx_radar_detect(local, ctx);
4090         }
4091
4092         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4093                 params.iftype_num[sdata->wdev.iftype]++;
4094
4095         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4096                                          ieee80211_iter_max_chans,
4097                                          &max_num_different_channels);
4098         if (err < 0)
4099                 return err;
4100
4101         return max_num_different_channels;
4102 }
4103
4104 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4105 {
4106         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4107         *buf++ = 7; /* len */
4108         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4109         *buf++ = 0x50;
4110         *buf++ = 0xf2;
4111         *buf++ = 2; /* WME */
4112         *buf++ = 0; /* WME info */
4113         *buf++ = 1; /* WME ver */
4114         *buf++ = qosinfo; /* U-APSD no in use */
4115
4116         return buf;
4117 }
4118
4119 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4120                              unsigned long *frame_cnt,
4121                              unsigned long *byte_cnt)
4122 {
4123         struct txq_info *txqi = to_txq_info(txq);
4124         u32 frag_cnt = 0, frag_bytes = 0;
4125         struct sk_buff *skb;
4126
4127         skb_queue_walk(&txqi->frags, skb) {
4128                 frag_cnt++;
4129                 frag_bytes += skb->len;
4130         }
4131
4132         if (frame_cnt)
4133                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4134
4135         if (byte_cnt)
4136                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4137 }
4138 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4139
4140 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4141         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4142         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4143         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4144         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4145 };