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 u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1667 {
1668         if ((end - pos) < 5)
1669                 return pos;
1670
1671         *pos++ = WLAN_EID_EXTENSION;
1672         *pos++ = 1 + sizeof(cap);
1673         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1674         memcpy(pos, &cap, sizeof(cap));
1675
1676         return pos + 2;
1677 }
1678
1679 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1680                                          u8 *buffer, size_t buffer_len,
1681                                          const u8 *ie, size_t ie_len,
1682                                          enum nl80211_band band,
1683                                          u32 rate_mask,
1684                                          struct cfg80211_chan_def *chandef,
1685                                          size_t *offset, u32 flags)
1686 {
1687         struct ieee80211_local *local = sdata->local;
1688         struct ieee80211_supported_band *sband;
1689         const struct ieee80211_sta_he_cap *he_cap;
1690         u8 *pos = buffer, *end = buffer + buffer_len;
1691         size_t noffset;
1692         int supp_rates_len, i;
1693         u8 rates[32];
1694         int num_rates;
1695         int ext_rates_len;
1696         int shift;
1697         u32 rate_flags;
1698         bool have_80mhz = false;
1699
1700         *offset = 0;
1701
1702         sband = local->hw.wiphy->bands[band];
1703         if (WARN_ON_ONCE(!sband))
1704                 return 0;
1705
1706         rate_flags = ieee80211_chandef_rate_flags(chandef);
1707         shift = ieee80211_chandef_get_shift(chandef);
1708
1709         num_rates = 0;
1710         for (i = 0; i < sband->n_bitrates; i++) {
1711                 if ((BIT(i) & rate_mask) == 0)
1712                         continue; /* skip rate */
1713                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1714                         continue;
1715
1716                 rates[num_rates++] =
1717                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1718                                           (1 << shift) * 5);
1719         }
1720
1721         supp_rates_len = min_t(int, num_rates, 8);
1722
1723         if (end - pos < 2 + supp_rates_len)
1724                 goto out_err;
1725         *pos++ = WLAN_EID_SUPP_RATES;
1726         *pos++ = supp_rates_len;
1727         memcpy(pos, rates, supp_rates_len);
1728         pos += supp_rates_len;
1729
1730         /* insert "request information" if in custom IEs */
1731         if (ie && ie_len) {
1732                 static const u8 before_extrates[] = {
1733                         WLAN_EID_SSID,
1734                         WLAN_EID_SUPP_RATES,
1735                         WLAN_EID_REQUEST,
1736                 };
1737                 noffset = ieee80211_ie_split(ie, ie_len,
1738                                              before_extrates,
1739                                              ARRAY_SIZE(before_extrates),
1740                                              *offset);
1741                 if (end - pos < noffset - *offset)
1742                         goto out_err;
1743                 memcpy(pos, ie + *offset, noffset - *offset);
1744                 pos += noffset - *offset;
1745                 *offset = noffset;
1746         }
1747
1748         ext_rates_len = num_rates - supp_rates_len;
1749         if (ext_rates_len > 0) {
1750                 if (end - pos < 2 + ext_rates_len)
1751                         goto out_err;
1752                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1753                 *pos++ = ext_rates_len;
1754                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1755                 pos += ext_rates_len;
1756         }
1757
1758         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1759                 if (end - pos < 3)
1760                         goto out_err;
1761                 *pos++ = WLAN_EID_DS_PARAMS;
1762                 *pos++ = 1;
1763                 *pos++ = ieee80211_frequency_to_channel(
1764                                 chandef->chan->center_freq);
1765         }
1766
1767         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1768                 goto done;
1769
1770         /* insert custom IEs that go before HT */
1771         if (ie && ie_len) {
1772                 static const u8 before_ht[] = {
1773                         /*
1774                          * no need to list the ones split off already
1775                          * (or generated here)
1776                          */
1777                         WLAN_EID_DS_PARAMS,
1778                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1779                 };
1780                 noffset = ieee80211_ie_split(ie, ie_len,
1781                                              before_ht, ARRAY_SIZE(before_ht),
1782                                              *offset);
1783                 if (end - pos < noffset - *offset)
1784                         goto out_err;
1785                 memcpy(pos, ie + *offset, noffset - *offset);
1786                 pos += noffset - *offset;
1787                 *offset = noffset;
1788         }
1789
1790         if (sband->ht_cap.ht_supported) {
1791                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1792                         goto out_err;
1793                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1794                                                 sband->ht_cap.cap);
1795         }
1796
1797         /* insert custom IEs that go before VHT */
1798         if (ie && ie_len) {
1799                 static const u8 before_vht[] = {
1800                         /*
1801                          * no need to list the ones split off already
1802                          * (or generated here)
1803                          */
1804                         WLAN_EID_BSS_COEX_2040,
1805                         WLAN_EID_EXT_CAPABILITY,
1806                         WLAN_EID_SSID_LIST,
1807                         WLAN_EID_CHANNEL_USAGE,
1808                         WLAN_EID_INTERWORKING,
1809                         WLAN_EID_MESH_ID,
1810                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1811                 };
1812                 noffset = ieee80211_ie_split(ie, ie_len,
1813                                              before_vht, ARRAY_SIZE(before_vht),
1814                                              *offset);
1815                 if (end - pos < noffset - *offset)
1816                         goto out_err;
1817                 memcpy(pos, ie + *offset, noffset - *offset);
1818                 pos += noffset - *offset;
1819                 *offset = noffset;
1820         }
1821
1822         /* Check if any channel in this sband supports at least 80 MHz */
1823         for (i = 0; i < sband->n_channels; i++) {
1824                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1825                                                 IEEE80211_CHAN_NO_80MHZ))
1826                         continue;
1827
1828                 have_80mhz = true;
1829                 break;
1830         }
1831
1832         if (sband->vht_cap.vht_supported && have_80mhz) {
1833                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1834                         goto out_err;
1835                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1836                                                  sband->vht_cap.cap);
1837         }
1838
1839         /* insert custom IEs that go before HE */
1840         if (ie && ie_len) {
1841                 static const u8 before_he[] = {
1842                         /*
1843                          * no need to list the ones split off before VHT
1844                          * or generated here
1845                          */
1846                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1847                         WLAN_EID_AP_CSN,
1848                         /* TODO: add 11ah/11aj/11ak elements */
1849                 };
1850                 noffset = ieee80211_ie_split(ie, ie_len,
1851                                              before_he, ARRAY_SIZE(before_he),
1852                                              *offset);
1853                 if (end - pos < noffset - *offset)
1854                         goto out_err;
1855                 memcpy(pos, ie + *offset, noffset - *offset);
1856                 pos += noffset - *offset;
1857                 *offset = noffset;
1858         }
1859
1860         he_cap = ieee80211_get_he_sta_cap(sband);
1861         if (he_cap) {
1862                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1863                 if (!pos)
1864                         goto out_err;
1865
1866                 if (sband->band == NL80211_BAND_6GHZ) {
1867                         enum nl80211_iftype iftype =
1868                                 ieee80211_vif_type_p2p(&sdata->vif);
1869                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1870
1871                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1872                 }
1873         }
1874
1875         /*
1876          * If adding more here, adjust code in main.c
1877          * that calculates local->scan_ies_len.
1878          */
1879
1880         return pos - buffer;
1881  out_err:
1882         WARN_ONCE(1, "not enough space for preq IEs\n");
1883  done:
1884         return pos - buffer;
1885 }
1886
1887 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1888                              size_t buffer_len,
1889                              struct ieee80211_scan_ies *ie_desc,
1890                              const u8 *ie, size_t ie_len,
1891                              u8 bands_used, u32 *rate_masks,
1892                              struct cfg80211_chan_def *chandef,
1893                              u32 flags)
1894 {
1895         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1896         int i;
1897
1898         memset(ie_desc, 0, sizeof(*ie_desc));
1899
1900         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1901                 if (bands_used & BIT(i)) {
1902                         pos += ieee80211_build_preq_ies_band(sdata,
1903                                                              buffer + pos,
1904                                                              buffer_len - pos,
1905                                                              ie, ie_len, i,
1906                                                              rate_masks[i],
1907                                                              chandef,
1908                                                              &custom_ie_offset,
1909                                                              flags);
1910                         ie_desc->ies[i] = buffer + old_pos;
1911                         ie_desc->len[i] = pos - old_pos;
1912                         old_pos = pos;
1913                 }
1914         }
1915
1916         /* add any remaining custom IEs */
1917         if (ie && ie_len) {
1918                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1919                               "not enough space for preq custom IEs\n"))
1920                         return pos;
1921                 memcpy(buffer + pos, ie + custom_ie_offset,
1922                        ie_len - custom_ie_offset);
1923                 ie_desc->common_ies = buffer + pos;
1924                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1925                 pos += ie_len - custom_ie_offset;
1926         }
1927
1928         return pos;
1929 };
1930
1931 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1932                                           const u8 *src, const u8 *dst,
1933                                           u32 ratemask,
1934                                           struct ieee80211_channel *chan,
1935                                           const u8 *ssid, size_t ssid_len,
1936                                           const u8 *ie, size_t ie_len,
1937                                           u32 flags)
1938 {
1939         struct ieee80211_local *local = sdata->local;
1940         struct cfg80211_chan_def chandef;
1941         struct sk_buff *skb;
1942         struct ieee80211_mgmt *mgmt;
1943         int ies_len;
1944         u32 rate_masks[NUM_NL80211_BANDS] = {};
1945         struct ieee80211_scan_ies dummy_ie_desc;
1946
1947         /*
1948          * Do not send DS Channel parameter for directed probe requests
1949          * in order to maximize the chance that we get a response.  Some
1950          * badly-behaved APs don't respond when this parameter is included.
1951          */
1952         chandef.width = sdata->vif.bss_conf.chandef.width;
1953         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1954                 chandef.chan = NULL;
1955         else
1956                 chandef.chan = chan;
1957
1958         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1959                                      100 + ie_len);
1960         if (!skb)
1961                 return NULL;
1962
1963         rate_masks[chan->band] = ratemask;
1964         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
1965                                            skb_tailroom(skb), &dummy_ie_desc,
1966                                            ie, ie_len, BIT(chan->band),
1967                                            rate_masks, &chandef, flags);
1968         skb_put(skb, ies_len);
1969
1970         if (dst) {
1971                 mgmt = (struct ieee80211_mgmt *) skb->data;
1972                 memcpy(mgmt->da, dst, ETH_ALEN);
1973                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1974         }
1975
1976         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1977
1978         return skb;
1979 }
1980
1981 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1982                             struct ieee802_11_elems *elems,
1983                             enum nl80211_band band, u32 *basic_rates)
1984 {
1985         struct ieee80211_supported_band *sband;
1986         size_t num_rates;
1987         u32 supp_rates, rate_flags;
1988         int i, j, shift;
1989
1990         sband = sdata->local->hw.wiphy->bands[band];
1991         if (WARN_ON(!sband))
1992                 return 1;
1993
1994         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1995         shift = ieee80211_vif_get_shift(&sdata->vif);
1996
1997         num_rates = sband->n_bitrates;
1998         supp_rates = 0;
1999         for (i = 0; i < elems->supp_rates_len +
2000                      elems->ext_supp_rates_len; i++) {
2001                 u8 rate = 0;
2002                 int own_rate;
2003                 bool is_basic;
2004                 if (i < elems->supp_rates_len)
2005                         rate = elems->supp_rates[i];
2006                 else if (elems->ext_supp_rates)
2007                         rate = elems->ext_supp_rates
2008                                 [i - elems->supp_rates_len];
2009                 own_rate = 5 * (rate & 0x7f);
2010                 is_basic = !!(rate & 0x80);
2011
2012                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2013                         continue;
2014
2015                 for (j = 0; j < num_rates; j++) {
2016                         int brate;
2017                         if ((rate_flags & sband->bitrates[j].flags)
2018                             != rate_flags)
2019                                 continue;
2020
2021                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2022                                              1 << shift);
2023
2024                         if (brate == own_rate) {
2025                                 supp_rates |= BIT(j);
2026                                 if (basic_rates && is_basic)
2027                                         *basic_rates |= BIT(j);
2028                         }
2029                 }
2030         }
2031         return supp_rates;
2032 }
2033
2034 void ieee80211_stop_device(struct ieee80211_local *local)
2035 {
2036         ieee80211_led_radio(local, false);
2037         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2038
2039         cancel_work_sync(&local->reconfig_filter);
2040
2041         flush_workqueue(local->workqueue);
2042         drv_stop(local);
2043 }
2044
2045 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2046                                            bool aborted)
2047 {
2048         /* It's possible that we don't handle the scan completion in
2049          * time during suspend, so if it's still marked as completed
2050          * here, queue the work and flush it to clean things up.
2051          * Instead of calling the worker function directly here, we
2052          * really queue it to avoid potential races with other flows
2053          * scheduling the same work.
2054          */
2055         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2056                 /* If coming from reconfiguration failure, abort the scan so
2057                  * we don't attempt to continue a partial HW scan - which is
2058                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2059                  * completed scan, and a 5 GHz portion is still pending.
2060                  */
2061                 if (aborted)
2062                         set_bit(SCAN_ABORTED, &local->scanning);
2063                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2064                 flush_delayed_work(&local->scan_work);
2065         }
2066 }
2067
2068 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2069 {
2070         struct ieee80211_sub_if_data *sdata;
2071         struct ieee80211_chanctx *ctx;
2072
2073         /*
2074          * We get here if during resume the device can't be restarted properly.
2075          * We might also get here if this happens during HW reset, which is a
2076          * slightly different situation and we need to drop all connections in
2077          * the latter case.
2078          *
2079          * Ask cfg80211 to turn off all interfaces, this will result in more
2080          * warnings but at least we'll then get into a clean stopped state.
2081          */
2082
2083         local->resuming = false;
2084         local->suspended = false;
2085         local->in_reconfig = false;
2086
2087         ieee80211_flush_completed_scan(local, true);
2088
2089         /* scheduled scan clearly can't be running any more, but tell
2090          * cfg80211 and clear local state
2091          */
2092         ieee80211_sched_scan_end(local);
2093
2094         list_for_each_entry(sdata, &local->interfaces, list)
2095                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2096
2097         /* Mark channel contexts as not being in the driver any more to avoid
2098          * removing them from the driver during the shutdown process...
2099          */
2100         mutex_lock(&local->chanctx_mtx);
2101         list_for_each_entry(ctx, &local->chanctx_list, list)
2102                 ctx->driver_present = false;
2103         mutex_unlock(&local->chanctx_mtx);
2104
2105         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2106 }
2107
2108 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2109                                      struct ieee80211_sub_if_data *sdata)
2110 {
2111         struct ieee80211_chanctx_conf *conf;
2112         struct ieee80211_chanctx *ctx;
2113
2114         if (!local->use_chanctx)
2115                 return;
2116
2117         mutex_lock(&local->chanctx_mtx);
2118         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2119                                          lockdep_is_held(&local->chanctx_mtx));
2120         if (conf) {
2121                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2122                 drv_assign_vif_chanctx(local, sdata, ctx);
2123         }
2124         mutex_unlock(&local->chanctx_mtx);
2125 }
2126
2127 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2128 {
2129         struct ieee80211_local *local = sdata->local;
2130         struct sta_info *sta;
2131
2132         /* add STAs back */
2133         mutex_lock(&local->sta_mtx);
2134         list_for_each_entry(sta, &local->sta_list, list) {
2135                 enum ieee80211_sta_state state;
2136
2137                 if (!sta->uploaded || sta->sdata != sdata)
2138                         continue;
2139
2140                 for (state = IEEE80211_STA_NOTEXIST;
2141                      state < sta->sta_state; state++)
2142                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2143                                               state + 1));
2144         }
2145         mutex_unlock(&local->sta_mtx);
2146 }
2147
2148 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2149 {
2150         struct cfg80211_nan_func *func, **funcs;
2151         int res, id, i = 0;
2152
2153         res = drv_start_nan(sdata->local, sdata,
2154                             &sdata->u.nan.conf);
2155         if (WARN_ON(res))
2156                 return res;
2157
2158         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2159                         sizeof(*funcs),
2160                         GFP_KERNEL);
2161         if (!funcs)
2162                 return -ENOMEM;
2163
2164         /* Add all the functions:
2165          * This is a little bit ugly. We need to call a potentially sleeping
2166          * callback for each NAN function, so we can't hold the spinlock.
2167          */
2168         spin_lock_bh(&sdata->u.nan.func_lock);
2169
2170         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2171                 funcs[i++] = func;
2172
2173         spin_unlock_bh(&sdata->u.nan.func_lock);
2174
2175         for (i = 0; funcs[i]; i++) {
2176                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2177                 if (WARN_ON(res))
2178                         ieee80211_nan_func_terminated(&sdata->vif,
2179                                                       funcs[i]->instance_id,
2180                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2181                                                       GFP_KERNEL);
2182         }
2183
2184         kfree(funcs);
2185
2186         return 0;
2187 }
2188
2189 int ieee80211_reconfig(struct ieee80211_local *local)
2190 {
2191         struct ieee80211_hw *hw = &local->hw;
2192         struct ieee80211_sub_if_data *sdata;
2193         struct ieee80211_chanctx *ctx;
2194         struct sta_info *sta;
2195         int res, i;
2196         bool reconfig_due_to_wowlan = false;
2197         struct ieee80211_sub_if_data *sched_scan_sdata;
2198         struct cfg80211_sched_scan_request *sched_scan_req;
2199         bool sched_scan_stopped = false;
2200         bool suspended = local->suspended;
2201
2202         /* nothing to do if HW shouldn't run */
2203         if (!local->open_count)
2204                 goto wake_up;
2205
2206 #ifdef CONFIG_PM
2207         if (suspended)
2208                 local->resuming = true;
2209
2210         if (local->wowlan) {
2211                 /*
2212                  * In the wowlan case, both mac80211 and the device
2213                  * are functional when the resume op is called, so
2214                  * clear local->suspended so the device could operate
2215                  * normally (e.g. pass rx frames).
2216                  */
2217                 local->suspended = false;
2218                 res = drv_resume(local);
2219                 local->wowlan = false;
2220                 if (res < 0) {
2221                         local->resuming = false;
2222                         return res;
2223                 }
2224                 if (res == 0)
2225                         goto wake_up;
2226                 WARN_ON(res > 1);
2227                 /*
2228                  * res is 1, which means the driver requested
2229                  * to go through a regular reset on wakeup.
2230                  * restore local->suspended in this case.
2231                  */
2232                 reconfig_due_to_wowlan = true;
2233                 local->suspended = true;
2234         }
2235 #endif
2236
2237         /*
2238          * In case of hw_restart during suspend (without wowlan),
2239          * cancel restart work, as we are reconfiguring the device
2240          * anyway.
2241          * Note that restart_work is scheduled on a frozen workqueue,
2242          * so we can't deadlock in this case.
2243          */
2244         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2245                 cancel_work_sync(&local->restart_work);
2246
2247         local->started = false;
2248
2249         /*
2250          * Upon resume hardware can sometimes be goofy due to
2251          * various platform / driver / bus issues, so restarting
2252          * the device may at times not work immediately. Propagate
2253          * the error.
2254          */
2255         res = drv_start(local);
2256         if (res) {
2257                 if (suspended)
2258                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2259                 else
2260                         WARN(1, "Hardware became unavailable during restart.\n");
2261                 ieee80211_handle_reconfig_failure(local);
2262                 return res;
2263         }
2264
2265         /* setup fragmentation threshold */
2266         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2267
2268         /* setup RTS threshold */
2269         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2270
2271         /* reset coverage class */
2272         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2273
2274         ieee80211_led_radio(local, true);
2275         ieee80211_mod_tpt_led_trig(local,
2276                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2277
2278         /* add interfaces */
2279         sdata = rtnl_dereference(local->monitor_sdata);
2280         if (sdata) {
2281                 /* in HW restart it exists already */
2282                 WARN_ON(local->resuming);
2283                 res = drv_add_interface(local, sdata);
2284                 if (WARN_ON(res)) {
2285                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2286                         synchronize_net();
2287                         kfree(sdata);
2288                 }
2289         }
2290
2291         list_for_each_entry(sdata, &local->interfaces, list) {
2292                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2293                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2294                     ieee80211_sdata_running(sdata)) {
2295                         res = drv_add_interface(local, sdata);
2296                         if (WARN_ON(res))
2297                                 break;
2298                 }
2299         }
2300
2301         /* If adding any of the interfaces failed above, roll back and
2302          * report failure.
2303          */
2304         if (res) {
2305                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2306                                                      list)
2307                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2308                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2309                             ieee80211_sdata_running(sdata))
2310                                 drv_remove_interface(local, sdata);
2311                 ieee80211_handle_reconfig_failure(local);
2312                 return res;
2313         }
2314
2315         /* add channel contexts */
2316         if (local->use_chanctx) {
2317                 mutex_lock(&local->chanctx_mtx);
2318                 list_for_each_entry(ctx, &local->chanctx_list, list)
2319                         if (ctx->replace_state !=
2320                             IEEE80211_CHANCTX_REPLACES_OTHER)
2321                                 WARN_ON(drv_add_chanctx(local, ctx));
2322                 mutex_unlock(&local->chanctx_mtx);
2323
2324                 sdata = rtnl_dereference(local->monitor_sdata);
2325                 if (sdata && ieee80211_sdata_running(sdata))
2326                         ieee80211_assign_chanctx(local, sdata);
2327         }
2328
2329         /* reconfigure hardware */
2330         ieee80211_hw_config(local, ~0);
2331
2332         ieee80211_configure_filter(local);
2333
2334         /* Finally also reconfigure all the BSS information */
2335         list_for_each_entry(sdata, &local->interfaces, list) {
2336                 u32 changed;
2337
2338                 if (!ieee80211_sdata_running(sdata))
2339                         continue;
2340
2341                 ieee80211_assign_chanctx(local, sdata);
2342
2343                 switch (sdata->vif.type) {
2344                 case NL80211_IFTYPE_AP_VLAN:
2345                 case NL80211_IFTYPE_MONITOR:
2346                         break;
2347                 case NL80211_IFTYPE_ADHOC:
2348                         if (sdata->vif.bss_conf.ibss_joined)
2349                                 WARN_ON(drv_join_ibss(local, sdata));
2350                         fallthrough;
2351                 default:
2352                         ieee80211_reconfig_stations(sdata);
2353                         fallthrough;
2354                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2355                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2356                                 drv_conf_tx(local, sdata, i,
2357                                             &sdata->tx_conf[i]);
2358                         break;
2359                 }
2360
2361                 /* common change flags for all interface types */
2362                 changed = BSS_CHANGED_ERP_CTS_PROT |
2363                           BSS_CHANGED_ERP_PREAMBLE |
2364                           BSS_CHANGED_ERP_SLOT |
2365                           BSS_CHANGED_HT |
2366                           BSS_CHANGED_BASIC_RATES |
2367                           BSS_CHANGED_BEACON_INT |
2368                           BSS_CHANGED_BSSID |
2369                           BSS_CHANGED_CQM |
2370                           BSS_CHANGED_QOS |
2371                           BSS_CHANGED_IDLE |
2372                           BSS_CHANGED_TXPOWER |
2373                           BSS_CHANGED_MCAST_RATE;
2374
2375                 if (sdata->vif.mu_mimo_owner)
2376                         changed |= BSS_CHANGED_MU_GROUPS;
2377
2378                 switch (sdata->vif.type) {
2379                 case NL80211_IFTYPE_STATION:
2380                         changed |= BSS_CHANGED_ASSOC |
2381                                    BSS_CHANGED_ARP_FILTER |
2382                                    BSS_CHANGED_PS;
2383
2384                         /* Re-send beacon info report to the driver */
2385                         if (sdata->u.mgd.have_beacon)
2386                                 changed |= BSS_CHANGED_BEACON_INFO;
2387
2388                         if (sdata->vif.bss_conf.max_idle_period ||
2389                             sdata->vif.bss_conf.protected_keep_alive)
2390                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2391
2392                         sdata_lock(sdata);
2393                         ieee80211_bss_info_change_notify(sdata, changed);
2394                         sdata_unlock(sdata);
2395                         break;
2396                 case NL80211_IFTYPE_OCB:
2397                         changed |= BSS_CHANGED_OCB;
2398                         ieee80211_bss_info_change_notify(sdata, changed);
2399                         break;
2400                 case NL80211_IFTYPE_ADHOC:
2401                         changed |= BSS_CHANGED_IBSS;
2402                         fallthrough;
2403                 case NL80211_IFTYPE_AP:
2404                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2405
2406                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2407                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2408                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2409                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2410
2411                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2412                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2413
2414                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2415                                         drv_start_ap(local, sdata);
2416                         }
2417                         fallthrough;
2418                 case NL80211_IFTYPE_MESH_POINT:
2419                         if (sdata->vif.bss_conf.enable_beacon) {
2420                                 changed |= BSS_CHANGED_BEACON |
2421                                            BSS_CHANGED_BEACON_ENABLED;
2422                                 ieee80211_bss_info_change_notify(sdata, changed);
2423                         }
2424                         break;
2425                 case NL80211_IFTYPE_NAN:
2426                         res = ieee80211_reconfig_nan(sdata);
2427                         if (res < 0) {
2428                                 ieee80211_handle_reconfig_failure(local);
2429                                 return res;
2430                         }
2431                         break;
2432                 case NL80211_IFTYPE_WDS:
2433                 case NL80211_IFTYPE_AP_VLAN:
2434                 case NL80211_IFTYPE_MONITOR:
2435                 case NL80211_IFTYPE_P2P_DEVICE:
2436                         /* nothing to do */
2437                         break;
2438                 case NL80211_IFTYPE_UNSPECIFIED:
2439                 case NUM_NL80211_IFTYPES:
2440                 case NL80211_IFTYPE_P2P_CLIENT:
2441                 case NL80211_IFTYPE_P2P_GO:
2442                         WARN_ON(1);
2443                         break;
2444                 }
2445         }
2446
2447         ieee80211_recalc_ps(local);
2448
2449         /*
2450          * The sta might be in psm against the ap (e.g. because
2451          * this was the state before a hw restart), so we
2452          * explicitly send a null packet in order to make sure
2453          * it'll sync against the ap (and get out of psm).
2454          */
2455         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2456                 list_for_each_entry(sdata, &local->interfaces, list) {
2457                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2458                                 continue;
2459                         if (!sdata->u.mgd.associated)
2460                                 continue;
2461
2462                         ieee80211_send_nullfunc(local, sdata, false);
2463                 }
2464         }
2465
2466         /* APs are now beaconing, add back stations */
2467         mutex_lock(&local->sta_mtx);
2468         list_for_each_entry(sta, &local->sta_list, list) {
2469                 enum ieee80211_sta_state state;
2470
2471                 if (!sta->uploaded)
2472                         continue;
2473
2474                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2475                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2476                         continue;
2477
2478                 for (state = IEEE80211_STA_NOTEXIST;
2479                      state < sta->sta_state; state++)
2480                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2481                                               state + 1));
2482         }
2483         mutex_unlock(&local->sta_mtx);
2484
2485         /* add back keys */
2486         list_for_each_entry(sdata, &local->interfaces, list)
2487                 ieee80211_reenable_keys(sdata);
2488
2489         /* Reconfigure sched scan if it was interrupted by FW restart */
2490         mutex_lock(&local->mtx);
2491         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2492                                                 lockdep_is_held(&local->mtx));
2493         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2494                                                 lockdep_is_held(&local->mtx));
2495         if (sched_scan_sdata && sched_scan_req)
2496                 /*
2497                  * Sched scan stopped, but we don't want to report it. Instead,
2498                  * we're trying to reschedule. However, if more than one scan
2499                  * plan was set, we cannot reschedule since we don't know which
2500                  * scan plan was currently running (and some scan plans may have
2501                  * already finished).
2502                  */
2503                 if (sched_scan_req->n_scan_plans > 1 ||
2504                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2505                                                          sched_scan_req)) {
2506                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2507                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2508                         sched_scan_stopped = true;
2509                 }
2510         mutex_unlock(&local->mtx);
2511
2512         if (sched_scan_stopped)
2513                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2514
2515  wake_up:
2516
2517         if (local->monitors == local->open_count && local->monitors > 0)
2518                 ieee80211_add_virtual_monitor(local);
2519
2520         /*
2521          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2522          * sessions can be established after a resume.
2523          *
2524          * Also tear down aggregation sessions since reconfiguring
2525          * them in a hardware restart scenario is not easily done
2526          * right now, and the hardware will have lost information
2527          * about the sessions, but we and the AP still think they
2528          * are active. This is really a workaround though.
2529          */
2530         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2531                 mutex_lock(&local->sta_mtx);
2532
2533                 list_for_each_entry(sta, &local->sta_list, list) {
2534                         if (!local->resuming)
2535                                 ieee80211_sta_tear_down_BA_sessions(
2536                                                 sta, AGG_STOP_LOCAL_REQUEST);
2537                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2538                 }
2539
2540                 mutex_unlock(&local->sta_mtx);
2541         }
2542
2543         if (local->in_reconfig) {
2544                 local->in_reconfig = false;
2545                 barrier();
2546
2547                 /* Restart deferred ROCs */
2548                 mutex_lock(&local->mtx);
2549                 ieee80211_start_next_roc(local);
2550                 mutex_unlock(&local->mtx);
2551
2552                 /* Requeue all works */
2553                 list_for_each_entry(sdata, &local->interfaces, list)
2554                         ieee80211_queue_work(&local->hw, &sdata->work);
2555         }
2556
2557         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2558                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2559                                         false);
2560
2561         /*
2562          * If this is for hw restart things are still running.
2563          * We may want to change that later, however.
2564          */
2565         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2566                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2567
2568         if (!suspended)
2569                 return 0;
2570
2571 #ifdef CONFIG_PM
2572         /* first set suspended false, then resuming */
2573         local->suspended = false;
2574         mb();
2575         local->resuming = false;
2576
2577         ieee80211_flush_completed_scan(local, false);
2578
2579         if (local->open_count && !reconfig_due_to_wowlan)
2580                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2581
2582         list_for_each_entry(sdata, &local->interfaces, list) {
2583                 if (!ieee80211_sdata_running(sdata))
2584                         continue;
2585                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2586                         ieee80211_sta_restart(sdata);
2587         }
2588
2589         mod_timer(&local->sta_cleanup, jiffies + 1);
2590 #else
2591         WARN_ON(1);
2592 #endif
2593
2594         return 0;
2595 }
2596
2597 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2598 {
2599         struct ieee80211_sub_if_data *sdata;
2600         struct ieee80211_local *local;
2601         struct ieee80211_key *key;
2602
2603         if (WARN_ON(!vif))
2604                 return;
2605
2606         sdata = vif_to_sdata(vif);
2607         local = sdata->local;
2608
2609         if (WARN_ON(!local->resuming))
2610                 return;
2611
2612         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2613                 return;
2614
2615         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2616
2617         mutex_lock(&local->key_mtx);
2618         list_for_each_entry(key, &sdata->key_list, list)
2619                 key->flags |= KEY_FLAG_TAINTED;
2620         mutex_unlock(&local->key_mtx);
2621 }
2622 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2623
2624 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2625 {
2626         struct ieee80211_local *local = sdata->local;
2627         struct ieee80211_chanctx_conf *chanctx_conf;
2628         struct ieee80211_chanctx *chanctx;
2629
2630         mutex_lock(&local->chanctx_mtx);
2631
2632         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2633                                         lockdep_is_held(&local->chanctx_mtx));
2634
2635         /*
2636          * This function can be called from a work, thus it may be possible
2637          * that the chanctx_conf is removed (due to a disconnection, for
2638          * example).
2639          * So nothing should be done in such case.
2640          */
2641         if (!chanctx_conf)
2642                 goto unlock;
2643
2644         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2645         ieee80211_recalc_smps_chanctx(local, chanctx);
2646  unlock:
2647         mutex_unlock(&local->chanctx_mtx);
2648 }
2649
2650 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2651 {
2652         struct ieee80211_local *local = sdata->local;
2653         struct ieee80211_chanctx_conf *chanctx_conf;
2654         struct ieee80211_chanctx *chanctx;
2655
2656         mutex_lock(&local->chanctx_mtx);
2657
2658         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2659                                         lockdep_is_held(&local->chanctx_mtx));
2660
2661         if (WARN_ON_ONCE(!chanctx_conf))
2662                 goto unlock;
2663
2664         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2665         ieee80211_recalc_chanctx_min_def(local, chanctx);
2666  unlock:
2667         mutex_unlock(&local->chanctx_mtx);
2668 }
2669
2670 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2671 {
2672         size_t pos = offset;
2673
2674         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2675                 pos += 2 + ies[pos + 1];
2676
2677         return pos;
2678 }
2679
2680 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2681                                             int rssi_min_thold,
2682                                             int rssi_max_thold)
2683 {
2684         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2685
2686         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2687                 return;
2688
2689         /*
2690          * Scale up threshold values before storing it, as the RSSI averaging
2691          * algorithm uses a scaled up value as well. Change this scaling
2692          * factor if the RSSI averaging algorithm changes.
2693          */
2694         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2695         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2696 }
2697
2698 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2699                                     int rssi_min_thold,
2700                                     int rssi_max_thold)
2701 {
2702         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2703
2704         WARN_ON(rssi_min_thold == rssi_max_thold ||
2705                 rssi_min_thold > rssi_max_thold);
2706
2707         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2708                                        rssi_max_thold);
2709 }
2710 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2711
2712 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2713 {
2714         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2715
2716         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2717 }
2718 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2719
2720 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2721                               u16 cap)
2722 {
2723         __le16 tmp;
2724
2725         *pos++ = WLAN_EID_HT_CAPABILITY;
2726         *pos++ = sizeof(struct ieee80211_ht_cap);
2727         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2728
2729         /* capability flags */
2730         tmp = cpu_to_le16(cap);
2731         memcpy(pos, &tmp, sizeof(u16));
2732         pos += sizeof(u16);
2733
2734         /* AMPDU parameters */
2735         *pos++ = ht_cap->ampdu_factor |
2736                  (ht_cap->ampdu_density <<
2737                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2738
2739         /* MCS set */
2740         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2741         pos += sizeof(ht_cap->mcs);
2742
2743         /* extended capabilities */
2744         pos += sizeof(__le16);
2745
2746         /* BF capabilities */
2747         pos += sizeof(__le32);
2748
2749         /* antenna selection */
2750         pos += sizeof(u8);
2751
2752         return pos;
2753 }
2754
2755 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2756                                u32 cap)
2757 {
2758         __le32 tmp;
2759
2760         *pos++ = WLAN_EID_VHT_CAPABILITY;
2761         *pos++ = sizeof(struct ieee80211_vht_cap);
2762         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2763
2764         /* capability flags */
2765         tmp = cpu_to_le32(cap);
2766         memcpy(pos, &tmp, sizeof(u32));
2767         pos += sizeof(u32);
2768
2769         /* VHT MCS set */
2770         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2771         pos += sizeof(vht_cap->vht_mcs);
2772
2773         return pos;
2774 }
2775
2776 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2777 {
2778         const struct ieee80211_sta_he_cap *he_cap;
2779         struct ieee80211_supported_band *sband;
2780         u8 n;
2781
2782         sband = ieee80211_get_sband(sdata);
2783         if (!sband)
2784                 return 0;
2785
2786         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2787         if (!he_cap)
2788                 return 0;
2789
2790         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2791         return 2 + 1 +
2792                sizeof(he_cap->he_cap_elem) + n +
2793                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2794                                      he_cap->he_cap_elem.phy_cap_info);
2795 }
2796
2797 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2798                               const struct ieee80211_sta_he_cap *he_cap,
2799                               u8 *end)
2800 {
2801         u8 n;
2802         u8 ie_len;
2803         u8 *orig_pos = pos;
2804
2805         /* Make sure we have place for the IE */
2806         /*
2807          * TODO: the 1 added is because this temporarily is under the EXTENSION
2808          * IE. Get rid of it when it moves.
2809          */
2810         if (!he_cap)
2811                 return orig_pos;
2812
2813         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2814         ie_len = 2 + 1 +
2815                  sizeof(he_cap->he_cap_elem) + n +
2816                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2817                                        he_cap->he_cap_elem.phy_cap_info);
2818
2819         if ((end - pos) < ie_len)
2820                 return orig_pos;
2821
2822         *pos++ = WLAN_EID_EXTENSION;
2823         pos++; /* We'll set the size later below */
2824         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2825
2826         /* Fixed data */
2827         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2828         pos += sizeof(he_cap->he_cap_elem);
2829
2830         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2831         pos += n;
2832
2833         /* Check if PPE Threshold should be present */
2834         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2835              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2836                 goto end;
2837
2838         /*
2839          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2840          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2841          */
2842         n = hweight8(he_cap->ppe_thres[0] &
2843                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2844         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2845                    IEEE80211_PPE_THRES_NSS_POS));
2846
2847         /*
2848          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2849          * total size.
2850          */
2851         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2852         n = DIV_ROUND_UP(n, 8);
2853
2854         /* Copy PPE Thresholds */
2855         memcpy(pos, &he_cap->ppe_thres, n);
2856         pos += n;
2857
2858 end:
2859         orig_pos[1] = (pos - orig_pos) - 2;
2860         return pos;
2861 }
2862
2863 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2864                                     struct sk_buff *skb)
2865 {
2866         struct ieee80211_supported_band *sband;
2867         const struct ieee80211_sband_iftype_data *iftd;
2868         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2869         u8 *pos;
2870         u16 cap;
2871
2872         sband = ieee80211_get_sband(sdata);
2873         if (!sband)
2874                 return;
2875
2876         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2877         if (WARN_ON(!iftd))
2878                 return;
2879
2880         /* Check for device HE 6 GHz capability before adding element */
2881         if (!iftd->he_6ghz_capa.capa)
2882                 return;
2883
2884         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2885         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2886
2887         switch (sdata->smps_mode) {
2888         case IEEE80211_SMPS_AUTOMATIC:
2889         case IEEE80211_SMPS_NUM_MODES:
2890                 WARN_ON(1);
2891                 fallthrough;
2892         case IEEE80211_SMPS_OFF:
2893                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2894                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2895                 break;
2896         case IEEE80211_SMPS_STATIC:
2897                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2898                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2899                 break;
2900         case IEEE80211_SMPS_DYNAMIC:
2901                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2902                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2903                 break;
2904         }
2905
2906         pos = skb_put(skb, 2 + 1 + sizeof(cap));
2907         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
2908                                     pos + 2 + 1 + sizeof(cap));
2909 }
2910
2911 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2912                                const struct cfg80211_chan_def *chandef,
2913                                u16 prot_mode, bool rifs_mode)
2914 {
2915         struct ieee80211_ht_operation *ht_oper;
2916         /* Build HT Information */
2917         *pos++ = WLAN_EID_HT_OPERATION;
2918         *pos++ = sizeof(struct ieee80211_ht_operation);
2919         ht_oper = (struct ieee80211_ht_operation *)pos;
2920         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2921                                         chandef->chan->center_freq);
2922         switch (chandef->width) {
2923         case NL80211_CHAN_WIDTH_160:
2924         case NL80211_CHAN_WIDTH_80P80:
2925         case NL80211_CHAN_WIDTH_80:
2926         case NL80211_CHAN_WIDTH_40:
2927                 if (chandef->center_freq1 > chandef->chan->center_freq)
2928                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2929                 else
2930                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2931                 break;
2932         default:
2933                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2934                 break;
2935         }
2936         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2937             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2938             chandef->width != NL80211_CHAN_WIDTH_20)
2939                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2940
2941         if (rifs_mode)
2942                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2943
2944         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2945         ht_oper->stbc_param = 0x0000;
2946
2947         /* It seems that Basic MCS set and Supported MCS set
2948            are identical for the first 10 bytes */
2949         memset(&ht_oper->basic_set, 0, 16);
2950         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2951
2952         return pos + sizeof(struct ieee80211_ht_operation);
2953 }
2954
2955 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2956                                    const struct cfg80211_chan_def *chandef)
2957 {
2958         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2959         *pos++ = 3;                                     /* IE length */
2960         /* New channel width */
2961         switch (chandef->width) {
2962         case NL80211_CHAN_WIDTH_80:
2963                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2964                 break;
2965         case NL80211_CHAN_WIDTH_160:
2966                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2967                 break;
2968         case NL80211_CHAN_WIDTH_80P80:
2969                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2970                 break;
2971         default:
2972                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2973         }
2974
2975         /* new center frequency segment 0 */
2976         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2977         /* new center frequency segment 1 */
2978         if (chandef->center_freq2)
2979                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2980         else
2981                 *pos++ = 0;
2982 }
2983
2984 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2985                                 const struct cfg80211_chan_def *chandef)
2986 {
2987         struct ieee80211_vht_operation *vht_oper;
2988
2989         *pos++ = WLAN_EID_VHT_OPERATION;
2990         *pos++ = sizeof(struct ieee80211_vht_operation);
2991         vht_oper = (struct ieee80211_vht_operation *)pos;
2992         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2993                                                         chandef->center_freq1);
2994         if (chandef->center_freq2)
2995                 vht_oper->center_freq_seg1_idx =
2996                         ieee80211_frequency_to_channel(chandef->center_freq2);
2997         else
2998                 vht_oper->center_freq_seg1_idx = 0x00;
2999
3000         switch (chandef->width) {
3001         case NL80211_CHAN_WIDTH_160:
3002                 /*
3003                  * Convert 160 MHz channel width to new style as interop
3004                  * workaround.
3005                  */
3006                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3007                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3008                 if (chandef->chan->center_freq < chandef->center_freq1)
3009                         vht_oper->center_freq_seg0_idx -= 8;
3010                 else
3011                         vht_oper->center_freq_seg0_idx += 8;
3012                 break;
3013         case NL80211_CHAN_WIDTH_80P80:
3014                 /*
3015                  * Convert 80+80 MHz channel width to new style as interop
3016                  * workaround.
3017                  */
3018                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3019                 break;
3020         case NL80211_CHAN_WIDTH_80:
3021                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3022                 break;
3023         default:
3024                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3025                 break;
3026         }
3027
3028         /* don't require special VHT peer rates */
3029         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3030
3031         return pos + sizeof(struct ieee80211_vht_operation);
3032 }
3033
3034 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3035 {
3036         struct ieee80211_he_operation *he_oper;
3037         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3038         u32 he_oper_params;
3039         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3040
3041         if (chandef->chan->band == NL80211_BAND_6GHZ)
3042                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3043
3044         *pos++ = WLAN_EID_EXTENSION;
3045         *pos++ = ie_len;
3046         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3047
3048         he_oper_params = 0;
3049         he_oper_params |= u32_encode_bits(1023, /* disabled */
3050                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3051         he_oper_params |= u32_encode_bits(1,
3052                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3053         he_oper_params |= u32_encode_bits(1,
3054                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3055         if (chandef->chan->band == NL80211_BAND_6GHZ)
3056                 he_oper_params |= u32_encode_bits(1,
3057                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3058
3059         he_oper = (struct ieee80211_he_operation *)pos;
3060         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3061
3062         /* don't require special HE peer rates */
3063         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3064         pos += sizeof(struct ieee80211_he_operation);
3065
3066         if (chandef->chan->band != NL80211_BAND_6GHZ)
3067                 goto out;
3068
3069         /* TODO add VHT operational */
3070         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3071         he_6ghz_op->minrate = 6; /* 6 Mbps */
3072         he_6ghz_op->primary =
3073                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3074         he_6ghz_op->ccfs0 =
3075                 ieee80211_frequency_to_channel(chandef->center_freq1);
3076         if (chandef->center_freq2)
3077                 he_6ghz_op->ccfs1 =
3078                         ieee80211_frequency_to_channel(chandef->center_freq2);
3079         else
3080                 he_6ghz_op->ccfs1 = 0;
3081
3082         switch (chandef->width) {
3083         case NL80211_CHAN_WIDTH_160:
3084                 /* Convert 160 MHz channel width to new style as interop
3085                  * workaround.
3086                  */
3087                 he_6ghz_op->control =
3088                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3089                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3090                 if (chandef->chan->center_freq < chandef->center_freq1)
3091                         he_6ghz_op->ccfs0 -= 8;
3092                 else
3093                         he_6ghz_op->ccfs0 += 8;
3094                 fallthrough;
3095         case NL80211_CHAN_WIDTH_80P80:
3096                 he_6ghz_op->control =
3097                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3098                 break;
3099         case NL80211_CHAN_WIDTH_80:
3100                 he_6ghz_op->control =
3101                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3102                 break;
3103         case NL80211_CHAN_WIDTH_40:
3104                 he_6ghz_op->control =
3105                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3106                 break;
3107         default:
3108                 he_6ghz_op->control =
3109                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3110                 break;
3111         }
3112
3113         pos += sizeof(struct ieee80211_he_6ghz_oper);
3114
3115 out:
3116         return pos;
3117 }
3118
3119 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3120                                struct cfg80211_chan_def *chandef)
3121 {
3122         enum nl80211_channel_type channel_type;
3123
3124         if (!ht_oper)
3125                 return false;
3126
3127         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3128         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3129                 channel_type = NL80211_CHAN_HT20;
3130                 break;
3131         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3132                 channel_type = NL80211_CHAN_HT40PLUS;
3133                 break;
3134         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3135                 channel_type = NL80211_CHAN_HT40MINUS;
3136                 break;
3137         default:
3138                 channel_type = NL80211_CHAN_NO_HT;
3139                 return false;
3140         }
3141
3142         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3143         return true;
3144 }
3145
3146 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3147                                 const struct ieee80211_vht_operation *oper,
3148                                 const struct ieee80211_ht_operation *htop,
3149                                 struct cfg80211_chan_def *chandef)
3150 {
3151         struct cfg80211_chan_def new = *chandef;
3152         int cf0, cf1;
3153         int ccfs0, ccfs1, ccfs2;
3154         int ccf0, ccf1;
3155         u32 vht_cap;
3156         bool support_80_80 = false;
3157         bool support_160 = false;
3158         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3159                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3160         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3161                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3162
3163         if (!oper || !htop)
3164                 return false;
3165
3166         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3167         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3168                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3169         support_80_80 = ((vht_cap &
3170                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3171                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3172                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3173                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3174                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3175         ccfs0 = oper->center_freq_seg0_idx;
3176         ccfs1 = oper->center_freq_seg1_idx;
3177         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3178                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3179                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3180
3181         ccf0 = ccfs0;
3182
3183         /* if not supported, parse as though we didn't understand it */
3184         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3185                 ext_nss_bw_supp = 0;
3186
3187         /*
3188          * Cf. IEEE 802.11 Table 9-250
3189          *
3190          * We really just consider that because it's inefficient to connect
3191          * at a higher bandwidth than we'll actually be able to use.
3192          */
3193         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3194         default:
3195         case 0x00:
3196                 ccf1 = 0;
3197                 support_160 = false;
3198                 support_80_80 = false;
3199                 break;
3200         case 0x01:
3201                 support_80_80 = false;
3202                 fallthrough;
3203         case 0x02:
3204         case 0x03:
3205                 ccf1 = ccfs2;
3206                 break;
3207         case 0x10:
3208                 ccf1 = ccfs1;
3209                 break;
3210         case 0x11:
3211         case 0x12:
3212                 if (!ccfs1)
3213                         ccf1 = ccfs2;
3214                 else
3215                         ccf1 = ccfs1;
3216                 break;
3217         case 0x13:
3218         case 0x20:
3219         case 0x23:
3220                 ccf1 = ccfs1;
3221                 break;
3222         }
3223
3224         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3225         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3226
3227         switch (oper->chan_width) {
3228         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3229                 /* just use HT information directly */
3230                 break;
3231         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3232                 new.width = NL80211_CHAN_WIDTH_80;
3233                 new.center_freq1 = cf0;
3234                 /* If needed, adjust based on the newer interop workaround. */
3235                 if (ccf1) {
3236                         unsigned int diff;
3237
3238                         diff = abs(ccf1 - ccf0);
3239                         if ((diff == 8) && support_160) {
3240                                 new.width = NL80211_CHAN_WIDTH_160;
3241                                 new.center_freq1 = cf1;
3242                         } else if ((diff > 8) && support_80_80) {
3243                                 new.width = NL80211_CHAN_WIDTH_80P80;
3244                                 new.center_freq2 = cf1;
3245                         }
3246                 }
3247                 break;
3248         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3249                 /* deprecated encoding */
3250                 new.width = NL80211_CHAN_WIDTH_160;
3251                 new.center_freq1 = cf0;
3252                 break;
3253         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3254                 /* deprecated encoding */
3255                 new.width = NL80211_CHAN_WIDTH_80P80;
3256                 new.center_freq1 = cf0;
3257                 new.center_freq2 = cf1;
3258                 break;
3259         default:
3260                 return false;
3261         }
3262
3263         if (!cfg80211_chandef_valid(&new))
3264                 return false;
3265
3266         *chandef = new;
3267         return true;
3268 }
3269
3270 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3271                                     const struct ieee80211_he_operation *he_oper,
3272                                     struct cfg80211_chan_def *chandef)
3273 {
3274         struct ieee80211_local *local = sdata->local;
3275         struct ieee80211_supported_band *sband;
3276         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3277         const struct ieee80211_sta_he_cap *he_cap;
3278         struct cfg80211_chan_def he_chandef = *chandef;
3279         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3280         bool support_80_80, support_160;
3281         u8 he_phy_cap;
3282         u32 freq;
3283
3284         if (chandef->chan->band != NL80211_BAND_6GHZ)
3285                 return true;
3286
3287         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3288
3289         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3290         if (!he_cap) {
3291                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3292                 return false;
3293         }
3294
3295         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3296         support_160 =
3297                 he_phy_cap &
3298                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3299         support_80_80 =
3300                 he_phy_cap &
3301                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3302
3303         if (!he_oper) {
3304                 sdata_info(sdata,
3305                            "HE is not advertised on (on %d MHz), expect issues\n",
3306                            chandef->chan->center_freq);
3307                 return false;
3308         }
3309
3310         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3311
3312         if (!he_6ghz_oper) {
3313                 sdata_info(sdata,
3314                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3315                            chandef->chan->center_freq);
3316                 return false;
3317         }
3318
3319         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3320                                               NL80211_BAND_6GHZ);
3321         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3322
3323         switch (u8_get_bits(he_6ghz_oper->control,
3324                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3325         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3326                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3327                 break;
3328         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3329                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3330                 break;
3331         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3332                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3333                 break;
3334         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3335                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3336                 if (!he_6ghz_oper->ccfs1)
3337                         break;
3338                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3339                         if (support_160)
3340                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3341                 } else {
3342                         if (support_80_80)
3343                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3344                 }
3345                 break;
3346         }
3347
3348         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3349                 he_chandef.center_freq1 =
3350                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3351                                                        NL80211_BAND_6GHZ);
3352         } else {
3353                 he_chandef.center_freq1 =
3354                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3355                                                        NL80211_BAND_6GHZ);
3356                 he_chandef.center_freq2 =
3357                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3358                                                        NL80211_BAND_6GHZ);
3359         }
3360
3361         if (!cfg80211_chandef_valid(&he_chandef)) {
3362                 sdata_info(sdata,
3363                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3364                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3365                            he_chandef.width,
3366                            he_chandef.center_freq1,
3367                            he_chandef.center_freq2);
3368                 return false;
3369         }
3370
3371         *chandef = he_chandef;
3372
3373         return true;
3374 }
3375
3376 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3377                              const struct ieee80211_supported_band *sband,
3378                              const u8 *srates, int srates_len, u32 *rates)
3379 {
3380         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3381         int shift = ieee80211_chandef_get_shift(chandef);
3382         struct ieee80211_rate *br;
3383         int brate, rate, i, j, count = 0;
3384
3385         *rates = 0;
3386
3387         for (i = 0; i < srates_len; i++) {
3388                 rate = srates[i] & 0x7f;
3389
3390                 for (j = 0; j < sband->n_bitrates; j++) {
3391                         br = &sband->bitrates[j];
3392                         if ((rate_flags & br->flags) != rate_flags)
3393                                 continue;
3394
3395                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3396                         if (brate == rate) {
3397                                 *rates |= BIT(j);
3398                                 count++;
3399                                 break;
3400                         }
3401                 }
3402         }
3403         return count;
3404 }
3405
3406 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3407                             struct sk_buff *skb, bool need_basic,
3408                             enum nl80211_band band)
3409 {
3410         struct ieee80211_local *local = sdata->local;
3411         struct ieee80211_supported_band *sband;
3412         int rate, shift;
3413         u8 i, rates, *pos;
3414         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3415         u32 rate_flags;
3416
3417         shift = ieee80211_vif_get_shift(&sdata->vif);
3418         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3419         sband = local->hw.wiphy->bands[band];
3420         rates = 0;
3421         for (i = 0; i < sband->n_bitrates; i++) {
3422                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3423                         continue;
3424                 rates++;
3425         }
3426         if (rates > 8)
3427                 rates = 8;
3428
3429         if (skb_tailroom(skb) < rates + 2)
3430                 return -ENOMEM;
3431
3432         pos = skb_put(skb, rates + 2);
3433         *pos++ = WLAN_EID_SUPP_RATES;
3434         *pos++ = rates;
3435         for (i = 0; i < rates; i++) {
3436                 u8 basic = 0;
3437                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3438                         continue;
3439
3440                 if (need_basic && basic_rates & BIT(i))
3441                         basic = 0x80;
3442                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3443                                     5 * (1 << shift));
3444                 *pos++ = basic | (u8) rate;
3445         }
3446
3447         return 0;
3448 }
3449
3450 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3451                                 struct sk_buff *skb, bool need_basic,
3452                                 enum nl80211_band band)
3453 {
3454         struct ieee80211_local *local = sdata->local;
3455         struct ieee80211_supported_band *sband;
3456         int rate, shift;
3457         u8 i, exrates, *pos;
3458         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3459         u32 rate_flags;
3460
3461         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3462         shift = ieee80211_vif_get_shift(&sdata->vif);
3463
3464         sband = local->hw.wiphy->bands[band];
3465         exrates = 0;
3466         for (i = 0; i < sband->n_bitrates; i++) {
3467                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3468                         continue;
3469                 exrates++;
3470         }
3471
3472         if (exrates > 8)
3473                 exrates -= 8;
3474         else
3475                 exrates = 0;
3476
3477         if (skb_tailroom(skb) < exrates + 2)
3478                 return -ENOMEM;
3479
3480         if (exrates) {
3481                 pos = skb_put(skb, exrates + 2);
3482                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3483                 *pos++ = exrates;
3484                 for (i = 8; i < sband->n_bitrates; i++) {
3485                         u8 basic = 0;
3486                         if ((rate_flags & sband->bitrates[i].flags)
3487                             != rate_flags)
3488                                 continue;
3489                         if (need_basic && basic_rates & BIT(i))
3490                                 basic = 0x80;
3491                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3492                                             5 * (1 << shift));
3493                         *pos++ = basic | (u8) rate;
3494                 }
3495         }
3496         return 0;
3497 }
3498
3499 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3500 {
3501         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3502         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3503
3504         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3505                 /* non-managed type inferfaces */
3506                 return 0;
3507         }
3508         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3509 }
3510 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3511
3512 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3513 {
3514         if (!mcs)
3515                 return 1;
3516
3517         /* TODO: consider rx_highest */
3518
3519         if (mcs->rx_mask[3])
3520                 return 4;
3521         if (mcs->rx_mask[2])
3522                 return 3;
3523         if (mcs->rx_mask[1])
3524                 return 2;
3525         return 1;
3526 }
3527
3528 /**
3529  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3530  * @local: mac80211 hw info struct
3531  * @status: RX status
3532  * @mpdu_len: total MPDU length (including FCS)
3533  * @mpdu_offset: offset into MPDU to calculate timestamp at
3534  *
3535  * This function calculates the RX timestamp at the given MPDU offset, taking
3536  * into account what the RX timestamp was. An offset of 0 will just normalize
3537  * the timestamp to TSF at beginning of MPDU reception.
3538  */
3539 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3540                                      struct ieee80211_rx_status *status,
3541                                      unsigned int mpdu_len,
3542                                      unsigned int mpdu_offset)
3543 {
3544         u64 ts = status->mactime;
3545         struct rate_info ri;
3546         u16 rate;
3547
3548         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3549                 return 0;
3550
3551         memset(&ri, 0, sizeof(ri));
3552
3553         ri.bw = status->bw;
3554
3555         /* Fill cfg80211 rate info */
3556         switch (status->encoding) {
3557         case RX_ENC_HT:
3558                 ri.mcs = status->rate_idx;
3559                 ri.flags |= RATE_INFO_FLAGS_MCS;
3560                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3561                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3562                 break;
3563         case RX_ENC_VHT:
3564                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3565                 ri.mcs = status->rate_idx;
3566                 ri.nss = status->nss;
3567                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3568                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3569                 break;
3570         default:
3571                 WARN_ON(1);
3572                 fallthrough;
3573         case RX_ENC_LEGACY: {
3574                 struct ieee80211_supported_band *sband;
3575                 int shift = 0;
3576                 int bitrate;
3577
3578                 switch (status->bw) {
3579                 case RATE_INFO_BW_10:
3580                         shift = 1;
3581                         break;
3582                 case RATE_INFO_BW_5:
3583                         shift = 2;
3584                         break;
3585                 }
3586
3587                 sband = local->hw.wiphy->bands[status->band];
3588                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3589                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3590
3591                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3592                         /* TODO: handle HT/VHT preambles */
3593                         if (status->band == NL80211_BAND_5GHZ) {
3594                                 ts += 20 << shift;
3595                                 mpdu_offset += 2;
3596                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3597                                 ts += 96;
3598                         } else {
3599                                 ts += 192;
3600                         }
3601                 }
3602                 break;
3603                 }
3604         }
3605
3606         rate = cfg80211_calculate_bitrate(&ri);
3607         if (WARN_ONCE(!rate,
3608                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3609                       (unsigned long long)status->flag, status->rate_idx,
3610                       status->nss))
3611                 return 0;
3612
3613         /* rewind from end of MPDU */
3614         if (status->flag & RX_FLAG_MACTIME_END)
3615                 ts -= mpdu_len * 8 * 10 / rate;
3616
3617         ts += mpdu_offset * 8 * 10 / rate;
3618
3619         return ts;
3620 }
3621
3622 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3623 {
3624         struct ieee80211_sub_if_data *sdata;
3625         struct cfg80211_chan_def chandef;
3626
3627         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3628         ASSERT_RTNL();
3629
3630         mutex_lock(&local->mtx);
3631         list_for_each_entry(sdata, &local->interfaces, list) {
3632                 /* it might be waiting for the local->mtx, but then
3633                  * by the time it gets it, sdata->wdev.cac_started
3634                  * will no longer be true
3635                  */
3636                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3637
3638                 if (sdata->wdev.cac_started) {
3639                         chandef = sdata->vif.bss_conf.chandef;
3640                         ieee80211_vif_release_channel(sdata);
3641                         cfg80211_cac_event(sdata->dev,
3642                                            &chandef,
3643                                            NL80211_RADAR_CAC_ABORTED,
3644                                            GFP_KERNEL);
3645                 }
3646         }
3647         mutex_unlock(&local->mtx);
3648 }
3649
3650 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3651 {
3652         struct ieee80211_local *local =
3653                 container_of(work, struct ieee80211_local, radar_detected_work);
3654         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3655         struct ieee80211_chanctx *ctx;
3656         int num_chanctx = 0;
3657
3658         mutex_lock(&local->chanctx_mtx);
3659         list_for_each_entry(ctx, &local->chanctx_list, list) {
3660                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3661                         continue;
3662
3663                 num_chanctx++;
3664                 chandef = ctx->conf.def;
3665         }
3666         mutex_unlock(&local->chanctx_mtx);
3667
3668         rtnl_lock();
3669         ieee80211_dfs_cac_cancel(local);
3670         rtnl_unlock();
3671
3672         if (num_chanctx > 1)
3673                 /* XXX: multi-channel is not supported yet */
3674                 WARN_ON(1);
3675         else
3676                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3677 }
3678
3679 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3680 {
3681         struct ieee80211_local *local = hw_to_local(hw);
3682
3683         trace_api_radar_detected(local);
3684
3685         schedule_work(&local->radar_detected_work);
3686 }
3687 EXPORT_SYMBOL(ieee80211_radar_detected);
3688
3689 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3690 {
3691         u32 ret;
3692         int tmp;
3693
3694         switch (c->width) {
3695         case NL80211_CHAN_WIDTH_20:
3696                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3697                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3698                 break;
3699         case NL80211_CHAN_WIDTH_40:
3700                 c->width = NL80211_CHAN_WIDTH_20;
3701                 c->center_freq1 = c->chan->center_freq;
3702                 ret = IEEE80211_STA_DISABLE_40MHZ |
3703                       IEEE80211_STA_DISABLE_VHT;
3704                 break;
3705         case NL80211_CHAN_WIDTH_80:
3706                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3707                 /* n_P40 */
3708                 tmp /= 2;
3709                 /* freq_P40 */
3710                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3711                 c->width = NL80211_CHAN_WIDTH_40;
3712                 ret = IEEE80211_STA_DISABLE_VHT;
3713                 break;
3714         case NL80211_CHAN_WIDTH_80P80:
3715                 c->center_freq2 = 0;
3716                 c->width = NL80211_CHAN_WIDTH_80;
3717                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3718                       IEEE80211_STA_DISABLE_160MHZ;
3719                 break;
3720         case NL80211_CHAN_WIDTH_160:
3721                 /* n_P20 */
3722                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3723                 /* n_P80 */
3724                 tmp /= 4;
3725                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3726                 c->width = NL80211_CHAN_WIDTH_80;
3727                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3728                       IEEE80211_STA_DISABLE_160MHZ;
3729                 break;
3730         default:
3731         case NL80211_CHAN_WIDTH_20_NOHT:
3732                 WARN_ON_ONCE(1);
3733                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3734                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3735                 break;
3736         case NL80211_CHAN_WIDTH_1:
3737         case NL80211_CHAN_WIDTH_2:
3738         case NL80211_CHAN_WIDTH_4:
3739         case NL80211_CHAN_WIDTH_8:
3740         case NL80211_CHAN_WIDTH_16:
3741         case NL80211_CHAN_WIDTH_5:
3742         case NL80211_CHAN_WIDTH_10:
3743                 WARN_ON_ONCE(1);
3744                 /* keep c->width */
3745                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3746                 break;
3747         }
3748
3749         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3750
3751         return ret;
3752 }
3753
3754 /*
3755  * Returns true if smps_mode_new is strictly more restrictive than
3756  * smps_mode_old.
3757  */
3758 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3759                                    enum ieee80211_smps_mode smps_mode_new)
3760 {
3761         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3762                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3763                 return false;
3764
3765         switch (smps_mode_old) {
3766         case IEEE80211_SMPS_STATIC:
3767                 return false;
3768         case IEEE80211_SMPS_DYNAMIC:
3769                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3770         case IEEE80211_SMPS_OFF:
3771                 return smps_mode_new != IEEE80211_SMPS_OFF;
3772         default:
3773                 WARN_ON(1);
3774         }
3775
3776         return false;
3777 }
3778
3779 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3780                               struct cfg80211_csa_settings *csa_settings)
3781 {
3782         struct sk_buff *skb;
3783         struct ieee80211_mgmt *mgmt;
3784         struct ieee80211_local *local = sdata->local;
3785         int freq;
3786         int hdr_len = offsetofend(struct ieee80211_mgmt,
3787                                   u.action.u.chan_switch);
3788         u8 *pos;
3789
3790         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3791             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3792                 return -EOPNOTSUPP;
3793
3794         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3795                             5 + /* channel switch announcement element */
3796                             3 + /* secondary channel offset element */
3797                             5 + /* wide bandwidth channel switch announcement */
3798                             8); /* mesh channel switch parameters element */
3799         if (!skb)
3800                 return -ENOMEM;
3801
3802         skb_reserve(skb, local->tx_headroom);
3803         mgmt = skb_put_zero(skb, hdr_len);
3804         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3805                                           IEEE80211_STYPE_ACTION);
3806
3807         eth_broadcast_addr(mgmt->da);
3808         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3809         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3810                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3811         } else {
3812                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3813                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3814         }
3815         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3816         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3817         pos = skb_put(skb, 5);
3818         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3819         *pos++ = 3;                                             /* IE length */
3820         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3821         freq = csa_settings->chandef.chan->center_freq;
3822         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3823         *pos++ = csa_settings->count;                           /* count */
3824
3825         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3826                 enum nl80211_channel_type ch_type;
3827
3828                 skb_put(skb, 3);
3829                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3830                 *pos++ = 1;                                     /* IE length */
3831                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3832                 if (ch_type == NL80211_CHAN_HT40PLUS)
3833                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3834                 else
3835                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3836         }
3837
3838         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3839                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3840
3841                 skb_put(skb, 8);
3842                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3843                 *pos++ = 6;                                     /* IE length */
3844                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3845                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3846                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3847                 *pos++ |= csa_settings->block_tx ?
3848                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3849                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3850                 pos += 2;
3851                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3852                 pos += 2;
3853         }
3854
3855         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3856             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3857             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3858                 skb_put(skb, 5);
3859                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3860         }
3861
3862         ieee80211_tx_skb(sdata, skb);
3863         return 0;
3864 }
3865
3866 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3867 {
3868         return !(cs == NULL || cs->cipher == 0 ||
3869                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3870                  cs->hdr_len <= cs->key_idx_off ||
3871                  cs->key_idx_shift > 7 ||
3872                  cs->key_idx_mask == 0);
3873 }
3874
3875 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3876 {
3877         int i;
3878
3879         /* Ensure we have enough iftype bitmap space for all iftype values */
3880         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3881
3882         for (i = 0; i < n; i++)
3883                 if (!ieee80211_cs_valid(&cs[i]))
3884                         return false;
3885
3886         return true;
3887 }
3888
3889 const struct ieee80211_cipher_scheme *
3890 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3891                  enum nl80211_iftype iftype)
3892 {
3893         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3894         int n = local->hw.n_cipher_schemes;
3895         int i;
3896         const struct ieee80211_cipher_scheme *cs = NULL;
3897
3898         for (i = 0; i < n; i++) {
3899                 if (l[i].cipher == cipher) {
3900                         cs = &l[i];
3901                         break;
3902                 }
3903         }
3904
3905         if (!cs || !(cs->iftype & BIT(iftype)))
3906                 return NULL;
3907
3908         return cs;
3909 }
3910
3911 int ieee80211_cs_headroom(struct ieee80211_local *local,
3912                           struct cfg80211_crypto_settings *crypto,
3913                           enum nl80211_iftype iftype)
3914 {
3915         const struct ieee80211_cipher_scheme *cs;
3916         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3917         int i;
3918
3919         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3920                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3921                                       iftype);
3922
3923                 if (cs && headroom < cs->hdr_len)
3924                         headroom = cs->hdr_len;
3925         }
3926
3927         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3928         if (cs && headroom < cs->hdr_len)
3929                 headroom = cs->hdr_len;
3930
3931         return headroom;
3932 }
3933
3934 static bool
3935 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3936 {
3937         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3938         int skip;
3939
3940         if (end > 0)
3941                 return false;
3942
3943         /* One shot NOA  */
3944         if (data->count[i] == 1)
3945                 return false;
3946
3947         if (data->desc[i].interval == 0)
3948                 return false;
3949
3950         /* End time is in the past, check for repetitions */
3951         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3952         if (data->count[i] < 255) {
3953                 if (data->count[i] <= skip) {
3954                         data->count[i] = 0;
3955                         return false;
3956                 }
3957
3958                 data->count[i] -= skip;
3959         }
3960
3961         data->desc[i].start += skip * data->desc[i].interval;
3962
3963         return true;
3964 }
3965
3966 static bool
3967 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3968                              s32 *offset)
3969 {
3970         bool ret = false;
3971         int i;
3972
3973         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3974                 s32 cur;
3975
3976                 if (!data->count[i])
3977                         continue;
3978
3979                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3980                         ret = true;
3981
3982                 cur = data->desc[i].start - tsf;
3983                 if (cur > *offset)
3984                         continue;
3985
3986                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3987                 if (cur > *offset)
3988                         *offset = cur;
3989         }
3990
3991         return ret;
3992 }
3993
3994 static u32
3995 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3996 {
3997         s32 offset = 0;
3998         int tries = 0;
3999         /*
4000          * arbitrary limit, used to avoid infinite loops when combined NoA
4001          * descriptors cover the full time period.
4002          */
4003         int max_tries = 5;
4004
4005         ieee80211_extend_absent_time(data, tsf, &offset);
4006         do {
4007                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4008                         break;
4009
4010                 tries++;
4011         } while (tries < max_tries);
4012
4013         return offset;
4014 }
4015
4016 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4017 {
4018         u32 next_offset = BIT(31) - 1;
4019         int i;
4020
4021         data->absent = 0;
4022         data->has_next_tsf = false;
4023         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4024                 s32 start;
4025
4026                 if (!data->count[i])
4027                         continue;
4028
4029                 ieee80211_extend_noa_desc(data, tsf, i);
4030                 start = data->desc[i].start - tsf;
4031                 if (start <= 0)
4032                         data->absent |= BIT(i);
4033
4034                 if (next_offset > start)
4035                         next_offset = start;
4036
4037                 data->has_next_tsf = true;
4038         }
4039
4040         if (data->absent)
4041                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4042
4043         data->next_tsf = tsf + next_offset;
4044 }
4045 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4046
4047 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4048                             struct ieee80211_noa_data *data, u32 tsf)
4049 {
4050         int ret = 0;
4051         int i;
4052
4053         memset(data, 0, sizeof(*data));
4054
4055         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4056                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4057
4058                 if (!desc->count || !desc->duration)
4059                         continue;
4060
4061                 data->count[i] = desc->count;
4062                 data->desc[i].start = le32_to_cpu(desc->start_time);
4063                 data->desc[i].duration = le32_to_cpu(desc->duration);
4064                 data->desc[i].interval = le32_to_cpu(desc->interval);
4065
4066                 if (data->count[i] > 1 &&
4067                     data->desc[i].interval < data->desc[i].duration)
4068                         continue;
4069
4070                 ieee80211_extend_noa_desc(data, tsf, i);
4071                 ret++;
4072         }
4073
4074         if (ret)
4075                 ieee80211_update_p2p_noa(data, tsf);
4076
4077         return ret;
4078 }
4079 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4080
4081 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4082                            struct ieee80211_sub_if_data *sdata)
4083 {
4084         u64 tsf = drv_get_tsf(local, sdata);
4085         u64 dtim_count = 0;
4086         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4087         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4088         struct ps_data *ps;
4089         u8 bcns_from_dtim;
4090
4091         if (tsf == -1ULL || !beacon_int || !dtim_period)
4092                 return;
4093
4094         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4095             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4096                 if (!sdata->bss)
4097                         return;
4098
4099                 ps = &sdata->bss->ps;
4100         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4101                 ps = &sdata->u.mesh.ps;
4102         } else {
4103                 return;
4104         }
4105
4106         /*
4107          * actually finds last dtim_count, mac80211 will update in
4108          * __beacon_add_tim().
4109          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4110          */
4111         do_div(tsf, beacon_int);
4112         bcns_from_dtim = do_div(tsf, dtim_period);
4113         /* just had a DTIM */
4114         if (!bcns_from_dtim)
4115                 dtim_count = 0;
4116         else
4117                 dtim_count = dtim_period - bcns_from_dtim;
4118
4119         ps->dtim_count = dtim_count;
4120 }
4121
4122 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4123                                          struct ieee80211_chanctx *ctx)
4124 {
4125         struct ieee80211_sub_if_data *sdata;
4126         u8 radar_detect = 0;
4127
4128         lockdep_assert_held(&local->chanctx_mtx);
4129
4130         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4131                 return 0;
4132
4133         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4134                 if (sdata->reserved_radar_required)
4135                         radar_detect |= BIT(sdata->reserved_chandef.width);
4136
4137         /*
4138          * An in-place reservation context should not have any assigned vifs
4139          * until it replaces the other context.
4140          */
4141         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4142                 !list_empty(&ctx->assigned_vifs));
4143
4144         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4145                 if (sdata->radar_required)
4146                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4147
4148         return radar_detect;
4149 }
4150
4151 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4152                                  const struct cfg80211_chan_def *chandef,
4153                                  enum ieee80211_chanctx_mode chanmode,
4154                                  u8 radar_detect)
4155 {
4156         struct ieee80211_local *local = sdata->local;
4157         struct ieee80211_sub_if_data *sdata_iter;
4158         enum nl80211_iftype iftype = sdata->wdev.iftype;
4159         struct ieee80211_chanctx *ctx;
4160         int total = 1;
4161         struct iface_combination_params params = {
4162                 .radar_detect = radar_detect,
4163         };
4164
4165         lockdep_assert_held(&local->chanctx_mtx);
4166
4167         if (WARN_ON(hweight32(radar_detect) > 1))
4168                 return -EINVAL;
4169
4170         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4171                     !chandef->chan))
4172                 return -EINVAL;
4173
4174         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4175                 return -EINVAL;
4176
4177         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4178             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4179                 /*
4180                  * always passing this is harmless, since it'll be the
4181                  * same value that cfg80211 finds if it finds the same
4182                  * interface ... and that's always allowed
4183                  */
4184                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4185         }
4186
4187         /* Always allow software iftypes */
4188         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4189                 if (radar_detect)
4190                         return -EINVAL;
4191                 return 0;
4192         }
4193
4194         if (chandef)
4195                 params.num_different_channels = 1;
4196
4197         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4198                 params.iftype_num[iftype] = 1;
4199
4200         list_for_each_entry(ctx, &local->chanctx_list, list) {
4201                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4202                         continue;
4203                 params.radar_detect |=
4204                         ieee80211_chanctx_radar_detect(local, ctx);
4205                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4206                         params.num_different_channels++;
4207                         continue;
4208                 }
4209                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4210                     cfg80211_chandef_compatible(chandef,
4211                                                 &ctx->conf.def))
4212                         continue;
4213                 params.num_different_channels++;
4214         }
4215
4216         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4217                 struct wireless_dev *wdev_iter;
4218
4219                 wdev_iter = &sdata_iter->wdev;
4220
4221                 if (sdata_iter == sdata ||
4222                     !ieee80211_sdata_running(sdata_iter) ||
4223                     cfg80211_iftype_allowed(local->hw.wiphy,
4224                                             wdev_iter->iftype, 0, 1))
4225                         continue;
4226
4227                 params.iftype_num[wdev_iter->iftype]++;
4228                 total++;
4229         }
4230
4231         if (total == 1 && !params.radar_detect)
4232                 return 0;
4233
4234         return cfg80211_check_combinations(local->hw.wiphy, &params);
4235 }
4236
4237 static void
4238 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4239                          void *data)
4240 {
4241         u32 *max_num_different_channels = data;
4242
4243         *max_num_different_channels = max(*max_num_different_channels,
4244                                           c->num_different_channels);
4245 }
4246
4247 int ieee80211_max_num_channels(struct ieee80211_local *local)
4248 {
4249         struct ieee80211_sub_if_data *sdata;
4250         struct ieee80211_chanctx *ctx;
4251         u32 max_num_different_channels = 1;
4252         int err;
4253         struct iface_combination_params params = {0};
4254
4255         lockdep_assert_held(&local->chanctx_mtx);
4256
4257         list_for_each_entry(ctx, &local->chanctx_list, list) {
4258                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4259                         continue;
4260
4261                 params.num_different_channels++;
4262
4263                 params.radar_detect |=
4264                         ieee80211_chanctx_radar_detect(local, ctx);
4265         }
4266
4267         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4268                 params.iftype_num[sdata->wdev.iftype]++;
4269
4270         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4271                                          ieee80211_iter_max_chans,
4272                                          &max_num_different_channels);
4273         if (err < 0)
4274                 return err;
4275
4276         return max_num_different_channels;
4277 }
4278
4279 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4280 {
4281         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4282         *buf++ = 7; /* len */
4283         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4284         *buf++ = 0x50;
4285         *buf++ = 0xf2;
4286         *buf++ = 2; /* WME */
4287         *buf++ = 0; /* WME info */
4288         *buf++ = 1; /* WME ver */
4289         *buf++ = qosinfo; /* U-APSD no in use */
4290
4291         return buf;
4292 }
4293
4294 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4295                              unsigned long *frame_cnt,
4296                              unsigned long *byte_cnt)
4297 {
4298         struct txq_info *txqi = to_txq_info(txq);
4299         u32 frag_cnt = 0, frag_bytes = 0;
4300         struct sk_buff *skb;
4301
4302         skb_queue_walk(&txqi->frags, skb) {
4303                 frag_cnt++;
4304                 frag_bytes += skb->len;
4305         }
4306
4307         if (frame_cnt)
4308                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4309
4310         if (byte_cnt)
4311                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4312 }
4313 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4314
4315 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4316         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4317         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4318         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4319         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4320 };