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) 2018-2022 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 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  49                         enum nl80211_iftype type)
  50 {
  51         __le16 fc = hdr->frame_control;
  52
  53         if (ieee80211_is_data(fc)) {
  54                 if (len < 24) /* drop incorrect hdr len (data) */
  55                         return NULL;
  56
  57                 if (ieee80211_has_a4(fc))
  58                         return NULL;
  59                 if (ieee80211_has_tods(fc))
  60                         return hdr->addr1;
  61                 if (ieee80211_has_fromds(fc))
  62                         return hdr->addr2;
  63
  64                 return hdr->addr3;
  65         }
  66
  67         if (ieee80211_is_s1g_beacon(fc)) {
  68                 struct ieee80211_ext *ext = (void *) hdr;
  69
  70                 return ext->u.s1g_beacon.sa;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98 EXPORT_SYMBOL(ieee80211_get_bssid);
  99
 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 101 {
 102         struct sk_buff *skb;
 103         struct ieee80211_hdr *hdr;
 104
 105         skb_queue_walk(&tx->skbs, skb) {
 106                 hdr = (struct ieee80211_hdr *) skb->data;
 107                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 108         }
 109 }
 110
 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 112                              int rate, int erp, int short_preamble,
 113                              int shift)
 114 {
 115         int dur;
 116
 117         /* calculate duration (in microseconds, rounded up to next higher
 118          * integer if it includes a fractional microsecond) to send frame of
 119          * len bytes (does not include FCS) at the given rate. Duration will
 120          * also include SIFS.
 121          *
 122          * rate is in 100 kbps, so divident is multiplied by 10 in the
 123          * DIV_ROUND_UP() operations.
 124          *
 125          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 126          * is assumed to be 0 otherwise.
 127          */
 128
 129         if (band == NL80211_BAND_5GHZ || erp) {
 130                 /*
 131                  * OFDM:
 132                  *
 133                  * N_DBPS = DATARATE x 4
 134                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 135                  *      (16 = SIGNAL time, 6 = tail bits)
 136                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 137                  *
 138                  * T_SYM = 4 usec
 139                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 140                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 141                  *      signal ext = 6 usec
 142                  */
 143                 dur = 16; /* SIFS + signal ext */
 144                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 145                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 146
 147                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 148                  *  * times 4 for 5 MHz
 149                  *  * times 2 for 10 MHz
 150                  */
 151                 dur *= 1 << shift;
 152
 153                 /* rates should already consider the channel bandwidth,
 154                  * don't apply divisor again.
 155                  */
 156                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 157                                         4 * rate); /* T_SYM x N_SYM */
 158         } else {
 159                 /*
 160                  * 802.11b or 802.11g with 802.11b compatibility:
 161                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 162                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 163                  *
 164                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 165                  * aSIFSTime = 10 usec
 166                  * aPreambleLength = 144 usec or 72 usec with short preamble
 167                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 168                  */
 169                 dur = 10; /* aSIFSTime = 10 usec */
 170                 dur += short_preamble ? (72 + 24) : (144 + 48);
 171
 172                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 173         }
 174
 175         return dur;
 176 }
 177
 178 /* Exported duration function for driver use */
 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 180                                         struct ieee80211_vif *vif,
 181                                         enum nl80211_band band,
 182                                         size_t frame_len,
 183                                         struct ieee80211_rate *rate)
 184 {
 185         struct ieee80211_sub_if_data *sdata;
 186         u16 dur;
 187         int erp, shift = 0;
 188         bool short_preamble = false;
 189
 190         erp = 0;
 191         if (vif) {
 192                 sdata = vif_to_sdata(vif);
 193                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 194                 if (sdata->deflink.operating_11g_mode)
 195                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 196                 shift = ieee80211_vif_get_shift(vif);
 197         }
 198
 199         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 200                                        short_preamble, shift);
 201
 202         return cpu_to_le16(dur);
 203 }
 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 205
 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 207                               struct ieee80211_vif *vif, size_t frame_len,
 208                               const struct ieee80211_tx_info *frame_txctl)
 209 {
 210         struct ieee80211_local *local = hw_to_local(hw);
 211         struct ieee80211_rate *rate;
 212         struct ieee80211_sub_if_data *sdata;
 213         bool short_preamble;
 214         int erp, shift = 0, bitrate;
 215         u16 dur;
 216         struct ieee80211_supported_band *sband;
 217
 218         sband = local->hw.wiphy->bands[frame_txctl->band];
 219
 220         short_preamble = false;
 221
 222         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 223
 224         erp = 0;
 225         if (vif) {
 226                 sdata = vif_to_sdata(vif);
 227                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 228                 if (sdata->deflink.operating_11g_mode)
 229                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 230                 shift = ieee80211_vif_get_shift(vif);
 231         }
 232
 233         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 234
 235         /* CTS duration */
 236         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                        erp, short_preamble, shift);
 238         /* Data frame duration */
 239         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 240                                         erp, short_preamble, shift);
 241         /* ACK duration */
 242         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 243                                         erp, short_preamble, shift);
 244
 245         return cpu_to_le16(dur);
 246 }
 247 EXPORT_SYMBOL(ieee80211_rts_duration);
 248
 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 250                                     struct ieee80211_vif *vif,
 251                                     size_t frame_len,
 252                                     const struct ieee80211_tx_info *frame_txctl)
 253 {
 254         struct ieee80211_local *local = hw_to_local(hw);
 255         struct ieee80211_rate *rate;
 256         struct ieee80211_sub_if_data *sdata;
 257         bool short_preamble;
 258         int erp, shift = 0, bitrate;
 259         u16 dur;
 260         struct ieee80211_supported_band *sband;
 261
 262         sband = local->hw.wiphy->bands[frame_txctl->band];
 263
 264         short_preamble = false;
 265
 266         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 267         erp = 0;
 268         if (vif) {
 269                 sdata = vif_to_sdata(vif);
 270                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 271                 if (sdata->deflink.operating_11g_mode)
 272                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 273                 shift = ieee80211_vif_get_shift(vif);
 274         }
 275
 276         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 277
 278         /* Data frame duration */
 279         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 280                                        erp, short_preamble, shift);
 281         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 /* ACK duration */
 283                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 284                                                 erp, short_preamble, shift);
 285         }
 286
 287         return cpu_to_le16(dur);
 288 }
 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 290
 291 static void wake_tx_push_queue(struct ieee80211_local *local,
 292                                struct ieee80211_sub_if_data *sdata,
 293                                struct ieee80211_txq *queue)
 294 {
 295         int q = sdata->vif.hw_queue[queue->ac];
 296         struct ieee80211_tx_control control = {
 297                 .sta = queue->sta,
 298         };
 299         struct sk_buff *skb;
 300         unsigned long flags;
 301         bool q_stopped;
 302
 303         while (1) {
 304                 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 305                 q_stopped = local->queue_stop_reasons[q];
 306                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 307
 308                 if (q_stopped)
 309                         break;
 310
 311                 skb = ieee80211_tx_dequeue(&local->hw, queue);
 312                 if (!skb)
 313                         break;
 314
 315                 drv_tx(local, &control, skb);
 316         }
 317 }
 318
 319 /* wake_tx_queue handler for driver not implementing a custom one*/
 320 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
 321                                     struct ieee80211_txq *txq)
 322 {
 323         struct ieee80211_local *local = hw_to_local(hw);
 324         struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
 325         struct ieee80211_txq *queue;
 326
 327         /* Use ieee80211_next_txq() for airtime fairness accounting */
 328         ieee80211_txq_schedule_start(hw, txq->ac);
 329         while ((queue = ieee80211_next_txq(hw, txq->ac))) {
 330                 wake_tx_push_queue(local, sdata, queue);
 331                 ieee80211_return_txq(hw, queue, false);
 332         }
 333         ieee80211_txq_schedule_end(hw, txq->ac);
 334 }
 335 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
 336
 337 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 338 {
 339         struct ieee80211_local *local = sdata->local;
 340         struct ieee80211_vif *vif = &sdata->vif;
 341         struct fq *fq = &local->fq;
 342         struct ps_data *ps = NULL;
 343         struct txq_info *txqi;
 344         struct sta_info *sta;
 345         int i;
 346
 347         local_bh_disable();
 348         spin_lock(&fq->lock);
 349
 350         sdata->vif.txqs_stopped[ac] = false;
 351
 352         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 353                 goto out;
 354
 355         if (sdata->vif.type == NL80211_IFTYPE_AP)
 356                 ps = &sdata->bss->ps;
 357
 358         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 359                 if (sdata != sta->sdata)
 360                         continue;
 361
 362                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 363                         struct ieee80211_txq *txq = sta->sta.txq[i];
 364
 365                         if (!txq)
 366                                 continue;
 367
 368                         txqi = to_txq_info(txq);
 369
 370                         if (ac != txq->ac)
 371                                 continue;
 372
 373                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 374                                                 &txqi->flags))
 375                                 continue;
 376
 377                         spin_unlock(&fq->lock);
 378                         drv_wake_tx_queue(local, txqi);
 379                         spin_lock(&fq->lock);
 380                 }
 381         }
 382
 383         if (!vif->txq)
 384                 goto out;
 385
 386         txqi = to_txq_info(vif->txq);
 387
 388         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 389             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 390                 goto out;
 391
 392         spin_unlock(&fq->lock);
 393
 394         drv_wake_tx_queue(local, txqi);
 395         local_bh_enable();
 396         return;
 397 out:
 398         spin_unlock(&fq->lock);
 399         local_bh_enable();
 400 }
 401
 402 static void
 403 __releases(&local->queue_stop_reason_lock)
 404 __acquires(&local->queue_stop_reason_lock)
 405 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 406 {
 407         struct ieee80211_sub_if_data *sdata;
 408         int n_acs = IEEE80211_NUM_ACS;
 409         int i;
 410
 411         rcu_read_lock();
 412
 413         if (local->hw.queues < IEEE80211_NUM_ACS)
 414                 n_acs = 1;
 415
 416         for (i = 0; i < local->hw.queues; i++) {
 417                 if (local->queue_stop_reasons[i])
 418                         continue;
 419
 420                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 421                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 422                         int ac;
 423
 424                         for (ac = 0; ac < n_acs; ac++) {
 425                                 int ac_queue = sdata->vif.hw_queue[ac];
 426
 427                                 if (ac_queue == i ||
 428                                     sdata->vif.cab_queue == i)
 429                                         __ieee80211_wake_txqs(sdata, ac);
 430                         }
 431                 }
 432                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 433         }
 434
 435         rcu_read_unlock();
 436 }
 437
 438 void ieee80211_wake_txqs(struct tasklet_struct *t)
 439 {
 440         struct ieee80211_local *local = from_tasklet(local, t,
 441                                                      wake_txqs_tasklet);
 442         unsigned long flags;
 443
 444         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 445         _ieee80211_wake_txqs(local, &flags);
 446         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 447 }
 448
 449 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 450                                    enum queue_stop_reason reason,
 451                                    bool refcounted,
 452                                    unsigned long *flags)
 453 {
 454         struct ieee80211_local *local = hw_to_local(hw);
 455
 456         trace_wake_queue(local, queue, reason);
 457
 458         if (WARN_ON(queue >= hw->queues))
 459                 return;
 460
 461         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 462                 return;
 463
 464         if (!refcounted) {
 465                 local->q_stop_reasons[queue][reason] = 0;
 466         } else {
 467                 local->q_stop_reasons[queue][reason]--;
 468                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 469                         local->q_stop_reasons[queue][reason] = 0;
 470         }
 471
 472         if (local->q_stop_reasons[queue][reason] == 0)
 473                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 474
 475         if (local->queue_stop_reasons[queue] != 0)
 476                 /* someone still has this queue stopped */
 477                 return;
 478
 479         if (!skb_queue_empty(&local->pending[queue]))
 480                 tasklet_schedule(&local->tx_pending_tasklet);
 481
 482         /*
 483          * Calling _ieee80211_wake_txqs here can be a problem because it may
 484          * release queue_stop_reason_lock which has been taken by
 485          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 486          * release someone's lock, but it is fine because all the callers of
 487          * __ieee80211_wake_queue call it right before releasing the lock.
 488          */
 489         if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 490                 tasklet_schedule(&local->wake_txqs_tasklet);
 491         else
 492                 _ieee80211_wake_txqs(local, flags);
 493 }
 494
 495 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 496                                     enum queue_stop_reason reason,
 497                                     bool refcounted)
 498 {
 499         struct ieee80211_local *local = hw_to_local(hw);
 500         unsigned long flags;
 501
 502         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 503         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 504         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 505 }
 506
 507 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 508 {
 509         ieee80211_wake_queue_by_reason(hw, queue,
 510                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 511                                        false);
 512 }
 513 EXPORT_SYMBOL(ieee80211_wake_queue);
 514
 515 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 516                                    enum queue_stop_reason reason,
 517                                    bool refcounted)
 518 {
 519         struct ieee80211_local *local = hw_to_local(hw);
 520         struct ieee80211_sub_if_data *sdata;
 521         int n_acs = IEEE80211_NUM_ACS;
 522
 523         trace_stop_queue(local, queue, reason);
 524
 525         if (WARN_ON(queue >= hw->queues))
 526                 return;
 527
 528         if (!refcounted)
 529                 local->q_stop_reasons[queue][reason] = 1;
 530         else
 531                 local->q_stop_reasons[queue][reason]++;
 532
 533         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 534                 return;
 535
 536         if (local->hw.queues < IEEE80211_NUM_ACS)
 537                 n_acs = 1;
 538
 539         rcu_read_lock();
 540         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 541                 int ac;
 542
 543                 if (!sdata->dev)
 544                         continue;
 545
 546                 for (ac = 0; ac < n_acs; ac++) {
 547                         if (sdata->vif.hw_queue[ac] == queue ||
 548                             sdata->vif.cab_queue == queue) {
 549                                 spin_lock(&local->fq.lock);
 550                                 sdata->vif.txqs_stopped[ac] = true;
 551                                 spin_unlock(&local->fq.lock);
 552                         }
 553                 }
 554         }
 555         rcu_read_unlock();
 556 }
 557
 558 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 559                                     enum queue_stop_reason reason,
 560                                     bool refcounted)
 561 {
 562         struct ieee80211_local *local = hw_to_local(hw);
 563         unsigned long flags;
 564
 565         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 566         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 567         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 568 }
 569
 570 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 571 {
 572         ieee80211_stop_queue_by_reason(hw, queue,
 573                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 574                                        false);
 575 }
 576 EXPORT_SYMBOL(ieee80211_stop_queue);
 577
 578 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 579                                struct sk_buff *skb)
 580 {
 581         struct ieee80211_hw *hw = &local->hw;
 582         unsigned long flags;
 583         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 584         int queue = info->hw_queue;
 585
 586         if (WARN_ON(!info->control.vif)) {
 587                 ieee80211_free_txskb(&local->hw, skb);
 588                 return;
 589         }
 590
 591         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 592         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 593                                false);
 594         __skb_queue_tail(&local->pending[queue], skb);
 595         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 596                                false, &flags);
 597         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 598 }
 599
 600 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 601                                 struct sk_buff_head *skbs)
 602 {
 603         struct ieee80211_hw *hw = &local->hw;
 604         struct sk_buff *skb;
 605         unsigned long flags;
 606         int queue, i;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         while ((skb = skb_dequeue(skbs))) {
 610                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 611
 612                 if (WARN_ON(!info->control.vif)) {
 613                         ieee80211_free_txskb(&local->hw, skb);
 614                         continue;
 615                 }
 616
 617                 queue = info->hw_queue;
 618
 619                 __ieee80211_stop_queue(hw, queue,
 620                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 621                                 false);
 622
 623                 __skb_queue_tail(&local->pending[queue], skb);
 624         }
 625
 626         for (i = 0; i < hw->queues; i++)
 627                 __ieee80211_wake_queue(hw, i,
 628                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 629                         false, &flags);
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 634                                      unsigned long queues,
 635                                      enum queue_stop_reason reason,
 636                                      bool refcounted)
 637 {
 638         struct ieee80211_local *local = hw_to_local(hw);
 639         unsigned long flags;
 640         int i;
 641
 642         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 643
 644         for_each_set_bit(i, &queues, hw->queues)
 645                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 646
 647         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 648 }
 649
 650 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 651 {
 652         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 653                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 654                                         false);
 655 }
 656 EXPORT_SYMBOL(ieee80211_stop_queues);
 657
 658 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 659 {
 660         struct ieee80211_local *local = hw_to_local(hw);
 661         unsigned long flags;
 662         int ret;
 663
 664         if (WARN_ON(queue >= hw->queues))
 665                 return true;
 666
 667         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 668         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 669                        &local->queue_stop_reasons[queue]);
 670         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 671         return ret;
 672 }
 673 EXPORT_SYMBOL(ieee80211_queue_stopped);
 674
 675 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 676                                      unsigned long queues,
 677                                      enum queue_stop_reason reason,
 678                                      bool refcounted)
 679 {
 680         struct ieee80211_local *local = hw_to_local(hw);
 681         unsigned long flags;
 682         int i;
 683
 684         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 685
 686         for_each_set_bit(i, &queues, hw->queues)
 687                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 688
 689         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 690 }
 691
 692 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 693 {
 694         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 695                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 696                                         false);
 697 }
 698 EXPORT_SYMBOL(ieee80211_wake_queues);
 699
 700 static unsigned int
 701 ieee80211_get_vif_queues(struct ieee80211_local *local,
 702                          struct ieee80211_sub_if_data *sdata)
 703 {
 704         unsigned int queues;
 705
 706         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 707                 int ac;
 708
 709                 queues = 0;
 710
 711                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 712                         queues |= BIT(sdata->vif.hw_queue[ac]);
 713                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 714                         queues |= BIT(sdata->vif.cab_queue);
 715         } else {
 716                 /* all queues */
 717                 queues = BIT(local->hw.queues) - 1;
 718         }
 719
 720         return queues;
 721 }
 722
 723 void __ieee80211_flush_queues(struct ieee80211_local *local,
 724                               struct ieee80211_sub_if_data *sdata,
 725                               unsigned int queues, bool drop)
 726 {
 727         if (!local->ops->flush)
 728                 return;
 729
 730         /*
 731          * If no queue was set, or if the HW doesn't support
 732          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 733          */
 734         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 735                 queues = ieee80211_get_vif_queues(local, sdata);
 736
 737         ieee80211_stop_queues_by_reason(&local->hw, queues,
 738                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 739                                         false);
 740
 741         drv_flush(local, sdata, queues, drop);
 742
 743         ieee80211_wake_queues_by_reason(&local->hw, queues,
 744                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 745                                         false);
 746 }
 747
 748 void ieee80211_flush_queues(struct ieee80211_local *local,
 749                             struct ieee80211_sub_if_data *sdata, bool drop)
 750 {
 751         __ieee80211_flush_queues(local, sdata, 0, drop);
 752 }
 753
 754 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 755                                struct ieee80211_sub_if_data *sdata,
 756                                enum queue_stop_reason reason)
 757 {
 758         ieee80211_stop_queues_by_reason(&local->hw,
 759                                         ieee80211_get_vif_queues(local, sdata),
 760                                         reason, true);
 761 }
 762
 763 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 764                                struct ieee80211_sub_if_data *sdata,
 765                                enum queue_stop_reason reason)
 766 {
 767         ieee80211_wake_queues_by_reason(&local->hw,
 768                                         ieee80211_get_vif_queues(local, sdata),
 769                                         reason, true);
 770 }
 771
 772 static void __iterate_interfaces(struct ieee80211_local *local,
 773                                  u32 iter_flags,
 774                                  void (*iterator)(void *data, u8 *mac,
 775                                                   struct ieee80211_vif *vif),
 776                                  void *data)
 777 {
 778         struct ieee80211_sub_if_data *sdata;
 779         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 780
 781         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 782                 switch (sdata->vif.type) {
 783                 case NL80211_IFTYPE_MONITOR:
 784                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 785                                 continue;
 786                         break;
 787                 case NL80211_IFTYPE_AP_VLAN:
 788                         continue;
 789                 default:
 790                         break;
 791                 }
 792                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 793                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 794                         continue;
 795                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 796                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 797                         continue;
 798                 if (ieee80211_sdata_running(sdata) || !active_only)
 799                         iterator(data, sdata->vif.addr,
 800                                  &sdata->vif);
 801         }
 802
 803         sdata = rcu_dereference_check(local->monitor_sdata,
 804                                       lockdep_is_held(&local->iflist_mtx) ||
 805                                       lockdep_is_held(&local->hw.wiphy->mtx));
 806         if (sdata &&
 807             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 808              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 809                 iterator(data, sdata->vif.addr, &sdata->vif);
 810 }
 811
 812 void ieee80211_iterate_interfaces(
 813         struct ieee80211_hw *hw, u32 iter_flags,
 814         void (*iterator)(void *data, u8 *mac,
 815                          struct ieee80211_vif *vif),
 816         void *data)
 817 {
 818         struct ieee80211_local *local = hw_to_local(hw);
 819
 820         mutex_lock(&local->iflist_mtx);
 821         __iterate_interfaces(local, iter_flags, iterator, data);
 822         mutex_unlock(&local->iflist_mtx);
 823 }
 824 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 825
 826 void ieee80211_iterate_active_interfaces_atomic(
 827         struct ieee80211_hw *hw, u32 iter_flags,
 828         void (*iterator)(void *data, u8 *mac,
 829                          struct ieee80211_vif *vif),
 830         void *data)
 831 {
 832         struct ieee80211_local *local = hw_to_local(hw);
 833
 834         rcu_read_lock();
 835         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 836                              iterator, data);
 837         rcu_read_unlock();
 838 }
 839 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 840
 841 void ieee80211_iterate_active_interfaces_mtx(
 842         struct ieee80211_hw *hw, u32 iter_flags,
 843         void (*iterator)(void *data, u8 *mac,
 844                          struct ieee80211_vif *vif),
 845         void *data)
 846 {
 847         struct ieee80211_local *local = hw_to_local(hw);
 848
 849         lockdep_assert_wiphy(hw->wiphy);
 850
 851         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 852                              iterator, data);
 853 }
 854 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 855
 856 static void __iterate_stations(struct ieee80211_local *local,
 857                                void (*iterator)(void *data,
 858                                                 struct ieee80211_sta *sta),
 859                                void *data)
 860 {
 861         struct sta_info *sta;
 862
 863         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 864                 if (!sta->uploaded)
 865                         continue;
 866
 867                 iterator(data, &sta->sta);
 868         }
 869 }
 870
 871 void ieee80211_iterate_stations(struct ieee80211_hw *hw,
 872                                 void (*iterator)(void *data,
 873                                                  struct ieee80211_sta *sta),
 874                                 void *data)
 875 {
 876         struct ieee80211_local *local = hw_to_local(hw);
 877
 878         mutex_lock(&local->sta_mtx);
 879         __iterate_stations(local, iterator, data);
 880         mutex_unlock(&local->sta_mtx);
 881 }
 882 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations);
 883
 884 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 885                         void (*iterator)(void *data,
 886                                          struct ieee80211_sta *sta),
 887                         void *data)
 888 {
 889         struct ieee80211_local *local = hw_to_local(hw);
 890
 891         rcu_read_lock();
 892         __iterate_stations(local, iterator, data);
 893         rcu_read_unlock();
 894 }
 895 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 896
 897 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 898 {
 899         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 900
 901         if (!ieee80211_sdata_running(sdata) ||
 902             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 903                 return NULL;
 904         return &sdata->vif;
 905 }
 906 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 907
 908 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 909 {
 910         if (!vif)
 911                 return NULL;
 912
 913         return &vif_to_sdata(vif)->wdev;
 914 }
 915 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 916
 917 /*
 918  * Nothing should have been stuffed into the workqueue during
 919  * the suspend->resume cycle. Since we can't check each caller
 920  * of this function if we are already quiescing / suspended,
 921  * check here and don't WARN since this can actually happen when
 922  * the rx path (for example) is racing against __ieee80211_suspend
 923  * and suspending / quiescing was set after the rx path checked
 924  * them.
 925  */
 926 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 927 {
 928         if (local->quiescing || (local->suspended && !local->resuming)) {
 929                 pr_warn("queueing ieee80211 work while going to suspend\n");
 930                 return false;
 931         }
 932
 933         return true;
 934 }
 935
 936 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 937 {
 938         struct ieee80211_local *local = hw_to_local(hw);
 939
 940         if (!ieee80211_can_queue_work(local))
 941                 return;
 942
 943         queue_work(local->workqueue, work);
 944 }
 945 EXPORT_SYMBOL(ieee80211_queue_work);
 946
 947 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 948                                   struct delayed_work *dwork,
 949                                   unsigned long delay)
 950 {
 951         struct ieee80211_local *local = hw_to_local(hw);
 952
 953         if (!ieee80211_can_queue_work(local))
 954                 return;
 955
 956         queue_delayed_work(local->workqueue, dwork, delay);
 957 }
 958 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 959
 960 static void
 961 ieee80211_parse_extension_element(u32 *crc,
 962                                   const struct element *elem,
 963                                   struct ieee802_11_elems *elems,
 964                                   struct ieee80211_elems_parse_params *params)
 965 {
 966         const void *data = elem->data + 1;
 967         u8 len;
 968
 969         if (!elem->datalen)
 970                 return;
 971
 972         len = elem->datalen - 1;
 973
 974         switch (elem->data[0]) {
 975         case WLAN_EID_EXT_HE_MU_EDCA:
 976                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 977                         elems->mu_edca_param_set = data;
 978                         if (crc)
 979                                 *crc = crc32_be(*crc, (void *)elem,
 980                                                 elem->datalen + 2);
 981                 }
 982                 break;
 983         case WLAN_EID_EXT_HE_CAPABILITY:
 984                 if (ieee80211_he_capa_size_ok(data, len)) {
 985                         elems->he_cap = data;
 986                         elems->he_cap_len = len;
 987                 }
 988                 break;
 989         case WLAN_EID_EXT_HE_OPERATION:
 990                 if (len >= sizeof(*elems->he_operation) &&
 991                     len >= ieee80211_he_oper_size(data) - 1) {
 992                         if (crc)
 993                                 *crc = crc32_be(*crc, (void *)elem,
 994                                                 elem->datalen + 2);
 995                         elems->he_operation = data;
 996                 }
 997                 break;
 998         case WLAN_EID_EXT_UORA:
 999                 if (len >= 1)
1000                         elems->uora_element = data;
1001                 break;
1002         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
1003                 if (len == 3)
1004                         elems->max_channel_switch_time = data;
1005                 break;
1006         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
1007                 if (len >= sizeof(*elems->mbssid_config_ie))
1008                         elems->mbssid_config_ie = data;
1009                 break;
1010         case WLAN_EID_EXT_HE_SPR:
1011                 if (len >= sizeof(*elems->he_spr) &&
1012                     len >= ieee80211_he_spr_size(data))
1013                         elems->he_spr = data;
1014                 break;
1015         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1016                 if (len >= sizeof(*elems->he_6ghz_capa))
1017                         elems->he_6ghz_capa = data;
1018                 break;
1019         case WLAN_EID_EXT_EHT_CAPABILITY:
1020                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
1021                                                data, len,
1022                                                params->from_ap)) {
1023                         elems->eht_cap = data;
1024                         elems->eht_cap_len = len;
1025                 }
1026                 break;
1027         case WLAN_EID_EXT_EHT_OPERATION:
1028                 if (ieee80211_eht_oper_size_ok(data, len))
1029                         elems->eht_operation = data;
1030                 break;
1031         case WLAN_EID_EXT_EHT_MULTI_LINK:
1032                 if (ieee80211_mle_size_ok(data, len)) {
1033                         elems->multi_link = (void *)data;
1034                         elems->multi_link_len = len;
1035                 }
1036                 break;
1037         }
1038 }
1039
1040 static u32
1041 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
1042                              struct ieee802_11_elems *elems,
1043                              const struct element *check_inherit)
1044 {
1045         const struct element *elem;
1046         bool calc_crc = params->filter != 0;
1047         DECLARE_BITMAP(seen_elems, 256);
1048         u32 crc = params->crc;
1049         const u8 *ie;
1050
1051         bitmap_zero(seen_elems, 256);
1052
1053         for_each_element(elem, params->start, params->len) {
1054                 bool elem_parse_failed;
1055                 u8 id = elem->id;
1056                 u8 elen = elem->datalen;
1057                 const u8 *pos = elem->data;
1058
1059                 if (check_inherit &&
1060                     !cfg80211_is_element_inherited(elem,
1061                                                    check_inherit))
1062                         continue;
1063
1064                 switch (id) {
1065                 case WLAN_EID_SSID:
1066                 case WLAN_EID_SUPP_RATES:
1067                 case WLAN_EID_FH_PARAMS:
1068                 case WLAN_EID_DS_PARAMS:
1069                 case WLAN_EID_CF_PARAMS:
1070                 case WLAN_EID_TIM:
1071                 case WLAN_EID_IBSS_PARAMS:
1072                 case WLAN_EID_CHALLENGE:
1073                 case WLAN_EID_RSN:
1074                 case WLAN_EID_ERP_INFO:
1075                 case WLAN_EID_EXT_SUPP_RATES:
1076                 case WLAN_EID_HT_CAPABILITY:
1077                 case WLAN_EID_HT_OPERATION:
1078                 case WLAN_EID_VHT_CAPABILITY:
1079                 case WLAN_EID_VHT_OPERATION:
1080                 case WLAN_EID_MESH_ID:
1081                 case WLAN_EID_MESH_CONFIG:
1082                 case WLAN_EID_PEER_MGMT:
1083                 case WLAN_EID_PREQ:
1084                 case WLAN_EID_PREP:
1085                 case WLAN_EID_PERR:
1086                 case WLAN_EID_RANN:
1087                 case WLAN_EID_CHANNEL_SWITCH:
1088                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1089                 case WLAN_EID_COUNTRY:
1090                 case WLAN_EID_PWR_CONSTRAINT:
1091                 case WLAN_EID_TIMEOUT_INTERVAL:
1092                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1093                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1094                 case WLAN_EID_CHAN_SWITCH_PARAM:
1095                 case WLAN_EID_EXT_CAPABILITY:
1096                 case WLAN_EID_CHAN_SWITCH_TIMING:
1097                 case WLAN_EID_LINK_ID:
1098                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1099                 case WLAN_EID_RSNX:
1100                 case WLAN_EID_S1G_BCN_COMPAT:
1101                 case WLAN_EID_S1G_CAPABILITIES:
1102                 case WLAN_EID_S1G_OPERATION:
1103                 case WLAN_EID_AID_RESPONSE:
1104                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1105                 /*
1106                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1107                  * that if the content gets bigger it might be needed more than once
1108                  */
1109                         if (test_bit(id, seen_elems)) {
1110                                 elems->parse_error = true;
1111                                 continue;
1112                         }
1113                         break;
1114                 }
1115
1116                 if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1117                         crc = crc32_be(crc, pos - 2, elen + 2);
1118
1119                 elem_parse_failed = false;
1120
1121                 switch (id) {
1122                 case WLAN_EID_LINK_ID:
1123                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1124                                 elem_parse_failed = true;
1125                                 break;
1126                         }
1127                         elems->lnk_id = (void *)(pos - 2);
1128                         break;
1129                 case WLAN_EID_CHAN_SWITCH_TIMING:
1130                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1131                                 elem_parse_failed = true;
1132                                 break;
1133                         }
1134                         elems->ch_sw_timing = (void *)pos;
1135                         break;
1136                 case WLAN_EID_EXT_CAPABILITY:
1137                         elems->ext_capab = pos;
1138                         elems->ext_capab_len = elen;
1139                         break;
1140                 case WLAN_EID_SSID:
1141                         elems->ssid = pos;
1142                         elems->ssid_len = elen;
1143                         break;
1144                 case WLAN_EID_SUPP_RATES:
1145                         elems->supp_rates = pos;
1146                         elems->supp_rates_len = elen;
1147                         break;
1148                 case WLAN_EID_DS_PARAMS:
1149                         if (elen >= 1)
1150                                 elems->ds_params = pos;
1151                         else
1152                                 elem_parse_failed = true;
1153                         break;
1154                 case WLAN_EID_TIM:
1155                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1156                                 elems->tim = (void *)pos;
1157                                 elems->tim_len = elen;
1158                         } else
1159                                 elem_parse_failed = true;
1160                         break;
1161                 case WLAN_EID_VENDOR_SPECIFIC:
1162                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1163                             pos[2] == 0xf2) {
1164                                 /* Microsoft OUI (00:50:F2) */
1165
1166                                 if (calc_crc)
1167                                         crc = crc32_be(crc, pos - 2, elen + 2);
1168
1169                                 if (elen >= 5 && pos[3] == 2) {
1170                                         /* OUI Type 2 - WMM IE */
1171                                         if (pos[4] == 0) {
1172                                                 elems->wmm_info = pos;
1173                                                 elems->wmm_info_len = elen;
1174                                         } else if (pos[4] == 1) {
1175                                                 elems->wmm_param = pos;
1176                                                 elems->wmm_param_len = elen;
1177                                         }
1178                                 }
1179                         }
1180                         break;
1181                 case WLAN_EID_RSN:
1182                         elems->rsn = pos;
1183                         elems->rsn_len = elen;
1184                         break;
1185                 case WLAN_EID_ERP_INFO:
1186                         if (elen >= 1)
1187                                 elems->erp_info = pos;
1188                         else
1189                                 elem_parse_failed = true;
1190                         break;
1191                 case WLAN_EID_EXT_SUPP_RATES:
1192                         elems->ext_supp_rates = pos;
1193                         elems->ext_supp_rates_len = elen;
1194                         break;
1195                 case WLAN_EID_HT_CAPABILITY:
1196                         if (elen >= sizeof(struct ieee80211_ht_cap))
1197                                 elems->ht_cap_elem = (void *)pos;
1198                         else
1199                                 elem_parse_failed = true;
1200                         break;
1201                 case WLAN_EID_HT_OPERATION:
1202                         if (elen >= sizeof(struct ieee80211_ht_operation))
1203                                 elems->ht_operation = (void *)pos;
1204                         else
1205                                 elem_parse_failed = true;
1206                         break;
1207                 case WLAN_EID_VHT_CAPABILITY:
1208                         if (elen >= sizeof(struct ieee80211_vht_cap))
1209                                 elems->vht_cap_elem = (void *)pos;
1210                         else
1211                                 elem_parse_failed = true;
1212                         break;
1213                 case WLAN_EID_VHT_OPERATION:
1214                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1215                                 elems->vht_operation = (void *)pos;
1216                                 if (calc_crc)
1217                                         crc = crc32_be(crc, pos - 2, elen + 2);
1218                                 break;
1219                         }
1220                         elem_parse_failed = true;
1221                         break;
1222                 case WLAN_EID_OPMODE_NOTIF:
1223                         if (elen > 0) {
1224                                 elems->opmode_notif = pos;
1225                                 if (calc_crc)
1226                                         crc = crc32_be(crc, pos - 2, elen + 2);
1227                                 break;
1228                         }
1229                         elem_parse_failed = true;
1230                         break;
1231                 case WLAN_EID_MESH_ID:
1232                         elems->mesh_id = pos;
1233                         elems->mesh_id_len = elen;
1234                         break;
1235                 case WLAN_EID_MESH_CONFIG:
1236                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1237                                 elems->mesh_config = (void *)pos;
1238                         else
1239                                 elem_parse_failed = true;
1240                         break;
1241                 case WLAN_EID_PEER_MGMT:
1242                         elems->peering = pos;
1243                         elems->peering_len = elen;
1244                         break;
1245                 case WLAN_EID_MESH_AWAKE_WINDOW:
1246                         if (elen >= 2)
1247                                 elems->awake_window = (void *)pos;
1248                         break;
1249                 case WLAN_EID_PREQ:
1250                         elems->preq = pos;
1251                         elems->preq_len = elen;
1252                         break;
1253                 case WLAN_EID_PREP:
1254                         elems->prep = pos;
1255                         elems->prep_len = elen;
1256                         break;
1257                 case WLAN_EID_PERR:
1258                         elems->perr = pos;
1259                         elems->perr_len = elen;
1260                         break;
1261                 case WLAN_EID_RANN:
1262                         if (elen >= sizeof(struct ieee80211_rann_ie))
1263                                 elems->rann = (void *)pos;
1264                         else
1265                                 elem_parse_failed = true;
1266                         break;
1267                 case WLAN_EID_CHANNEL_SWITCH:
1268                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1269                                 elem_parse_failed = true;
1270                                 break;
1271                         }
1272                         elems->ch_switch_ie = (void *)pos;
1273                         break;
1274                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1275                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1276                                 elem_parse_failed = true;
1277                                 break;
1278                         }
1279                         elems->ext_chansw_ie = (void *)pos;
1280                         break;
1281                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1282                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1283                                 elem_parse_failed = true;
1284                                 break;
1285                         }
1286                         elems->sec_chan_offs = (void *)pos;
1287                         break;
1288                 case WLAN_EID_CHAN_SWITCH_PARAM:
1289                         if (elen <
1290                             sizeof(*elems->mesh_chansw_params_ie)) {
1291                                 elem_parse_failed = true;
1292                                 break;
1293                         }
1294                         elems->mesh_chansw_params_ie = (void *)pos;
1295                         break;
1296                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1297                         if (!params->action ||
1298                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1299                                 elem_parse_failed = true;
1300                                 break;
1301                         }
1302                         elems->wide_bw_chansw_ie = (void *)pos;
1303                         break;
1304                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1305                         if (params->action) {
1306                                 elem_parse_failed = true;
1307                                 break;
1308                         }
1309                         /*
1310                          * This is a bit tricky, but as we only care about
1311                          * the wide bandwidth channel switch element, so
1312                          * just parse it out manually.
1313                          */
1314                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1315                                               pos, elen);
1316                         if (ie) {
1317                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1318                                         elems->wide_bw_chansw_ie =
1319                                                 (void *)(ie + 2);
1320                                 else
1321                                         elem_parse_failed = true;
1322                         }
1323                         break;
1324                 case WLAN_EID_COUNTRY:
1325                         elems->country_elem = pos;
1326                         elems->country_elem_len = elen;
1327                         break;
1328                 case WLAN_EID_PWR_CONSTRAINT:
1329                         if (elen != 1) {
1330                                 elem_parse_failed = true;
1331                                 break;
1332                         }
1333                         elems->pwr_constr_elem = pos;
1334                         break;
1335                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1336                         /* Lots of different options exist, but we only care
1337                          * about the Dynamic Transmit Power Control element.
1338                          * First check for the Cisco OUI, then for the DTPC
1339                          * tag (0x00).
1340                          */
1341                         if (elen < 4) {
1342                                 elem_parse_failed = true;
1343                                 break;
1344                         }
1345
1346                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1347                             pos[2] != 0x96 || pos[3] != 0x00)
1348                                 break;
1349
1350                         if (elen != 6) {
1351                                 elem_parse_failed = true;
1352                                 break;
1353                         }
1354
1355                         if (calc_crc)
1356                                 crc = crc32_be(crc, pos - 2, elen + 2);
1357
1358                         elems->cisco_dtpc_elem = pos;
1359                         break;
1360                 case WLAN_EID_ADDBA_EXT:
1361                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1362                                 elem_parse_failed = true;
1363                                 break;
1364                         }
1365                         elems->addba_ext_ie = (void *)pos;
1366                         break;
1367                 case WLAN_EID_TIMEOUT_INTERVAL:
1368                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1369                                 elems->timeout_int = (void *)pos;
1370                         else
1371                                 elem_parse_failed = true;
1372                         break;
1373                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1374                         if (elen >= sizeof(*elems->max_idle_period_ie))
1375                                 elems->max_idle_period_ie = (void *)pos;
1376                         break;
1377                 case WLAN_EID_RSNX:
1378                         elems->rsnx = pos;
1379                         elems->rsnx_len = elen;
1380                         break;
1381                 case WLAN_EID_TX_POWER_ENVELOPE:
1382                         if (elen < 1 ||
1383                             elen > sizeof(struct ieee80211_tx_pwr_env))
1384                                 break;
1385
1386                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1387                                 break;
1388
1389                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1390                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1391                         elems->tx_pwr_env_num++;
1392                         break;
1393                 case WLAN_EID_EXTENSION:
1394                         ieee80211_parse_extension_element(calc_crc ?
1395                                                                 &crc : NULL,
1396                                                           elem, elems, params);
1397                         break;
1398                 case WLAN_EID_S1G_CAPABILITIES:
1399                         if (elen >= sizeof(*elems->s1g_capab))
1400                                 elems->s1g_capab = (void *)pos;
1401                         else
1402                                 elem_parse_failed = true;
1403                         break;
1404                 case WLAN_EID_S1G_OPERATION:
1405                         if (elen == sizeof(*elems->s1g_oper))
1406                                 elems->s1g_oper = (void *)pos;
1407                         else
1408                                 elem_parse_failed = true;
1409                         break;
1410                 case WLAN_EID_S1G_BCN_COMPAT:
1411                         if (elen == sizeof(*elems->s1g_bcn_compat))
1412                                 elems->s1g_bcn_compat = (void *)pos;
1413                         else
1414                                 elem_parse_failed = true;
1415                         break;
1416                 case WLAN_EID_AID_RESPONSE:
1417                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1418                                 elems->aid_resp = (void *)pos;
1419                         else
1420                                 elem_parse_failed = true;
1421                         break;
1422                 default:
1423                         break;
1424                 }
1425
1426                 if (elem_parse_failed)
1427                         elems->parse_error = true;
1428                 else
1429                         __set_bit(id, seen_elems);
1430         }
1431
1432         if (!for_each_element_completed(elem, params->start, params->len))
1433                 elems->parse_error = true;
1434
1435         return crc;
1436 }
1437
1438 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1439                                             struct ieee802_11_elems *elems,
1440                                             struct cfg80211_bss *bss,
1441                                             u8 *nontransmitted_profile)
1442 {
1443         const struct element *elem, *sub;
1444         size_t profile_len = 0;
1445         bool found = false;
1446
1447         if (!bss || !bss->transmitted_bss)
1448                 return profile_len;
1449
1450         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1451                 if (elem->datalen < 2)
1452                         continue;
1453                 if (elem->data[0] < 1 || elem->data[0] > 8)
1454                         continue;
1455
1456                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1457                         u8 new_bssid[ETH_ALEN];
1458                         const u8 *index;
1459
1460                         if (sub->id != 0 || sub->datalen < 4) {
1461                                 /* not a valid BSS profile */
1462                                 continue;
1463                         }
1464
1465                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1466                             sub->data[1] != 2) {
1467                                 /* The first element of the
1468                                  * Nontransmitted BSSID Profile is not
1469                                  * the Nontransmitted BSSID Capability
1470                                  * element.
1471                                  */
1472                                 continue;
1473                         }
1474
1475                         memset(nontransmitted_profile, 0, len);
1476                         profile_len = cfg80211_merge_profile(start, len,
1477                                                              elem,
1478                                                              sub,
1479                                                              nontransmitted_profile,
1480                                                              len);
1481
1482                         /* found a Nontransmitted BSSID Profile */
1483                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1484                                                  nontransmitted_profile,
1485                                                  profile_len);
1486                         if (!index || index[1] < 1 || index[2] == 0) {
1487                                 /* Invalid MBSSID Index element */
1488                                 continue;
1489                         }
1490
1491                         cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1492                                                elem->data[0],
1493                                                index[2],
1494                                                new_bssid);
1495                         if (ether_addr_equal(new_bssid, bss->bssid)) {
1496                                 found = true;
1497                                 elems->bssid_index_len = index[1];
1498                                 elems->bssid_index = (void *)&index[2];
1499                                 break;
1500                         }
1501                 }
1502         }
1503
1504         return found ? profile_len : 0;
1505 }
1506
1507 static void ieee80211_defragment_element(struct ieee802_11_elems *elems,
1508                                          void **elem_ptr, size_t *len,
1509                                          size_t total_len, u8 frag_id)
1510 {
1511         u8 *data = *elem_ptr, *pos, *start;
1512         const struct element *elem;
1513
1514         /*
1515          * Since 'data' points to the data of the element, not the element
1516          * itself, allow 254 in case it was an extended element where the
1517          * extended ID isn't part of the data we see here and thus not part of
1518          * 'len' either.
1519          */
1520         if (!data || (*len != 254 && *len != 255))
1521                 return;
1522
1523         start = elems->scratch_pos;
1524
1525         if (WARN_ON(*len > (elems->scratch + elems->scratch_len -
1526                             elems->scratch_pos)))
1527                 return;
1528
1529         memcpy(elems->scratch_pos, data, *len);
1530         elems->scratch_pos += *len;
1531
1532         pos = data + *len;
1533         total_len -= *len;
1534         for_each_element(elem, pos, total_len) {
1535                 if (elem->id != frag_id)
1536                         break;
1537
1538                 if (WARN_ON(elem->datalen >
1539                             (elems->scratch + elems->scratch_len -
1540                              elems->scratch_pos)))
1541                         return;
1542
1543                 memcpy(elems->scratch_pos, elem->data, elem->datalen);
1544                 elems->scratch_pos += elem->datalen;
1545
1546                 *len += elem->datalen;
1547         }
1548
1549         *elem_ptr = start;
1550 }
1551
1552 static void ieee80211_mle_get_sta_prof(struct ieee802_11_elems *elems,
1553                                        u8 link_id)
1554 {
1555         const struct ieee80211_multi_link_elem *ml = elems->multi_link;
1556         size_t ml_len = elems->multi_link_len;
1557         const struct element *sub;
1558
1559         if (!ml || !ml_len)
1560                 return;
1561
1562         if (le16_get_bits(ml->control, IEEE80211_ML_CONTROL_TYPE) !=
1563             IEEE80211_ML_CONTROL_TYPE_BASIC)
1564                 return;
1565
1566         for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
1567                 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
1568                 u16 control;
1569
1570                 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
1571                         continue;
1572
1573                 if (!ieee80211_mle_sta_prof_size_ok(sub->data, sub->datalen))
1574                         return;
1575
1576                 control = le16_to_cpu(prof->control);
1577
1578                 if (link_id != u16_get_bits(control,
1579                                             IEEE80211_MLE_STA_CONTROL_LINK_ID))
1580                         continue;
1581
1582                 if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE))
1583                         return;
1584
1585                 elems->prof = prof;
1586                 elems->sta_prof_len = sub->datalen;
1587
1588                 /* the sub element can be fragmented */
1589                 ieee80211_defragment_element(elems, (void **)&elems->prof,
1590                                              &elems->sta_prof_len,
1591                                              ml_len - (sub->data - (u8 *)ml),
1592                                              IEEE80211_MLE_SUBELEM_FRAGMENT);
1593                 return;
1594         }
1595 }
1596
1597 static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems,
1598                                      struct ieee80211_elems_parse_params *params)
1599 {
1600         struct ieee80211_mle_per_sta_profile *prof;
1601         struct ieee80211_elems_parse_params sub = {
1602                 .action = params->action,
1603                 .from_ap = params->from_ap,
1604                 .link_id = -1,
1605         };
1606         const struct element *non_inherit = NULL;
1607         const u8 *end;
1608
1609         if (params->link_id == -1)
1610                 return;
1611
1612         ieee80211_defragment_element(elems, (void **)&elems->multi_link,
1613                                      &elems->multi_link_len,
1614                                      elems->total_len - ((u8 *)elems->multi_link -
1615                                                          elems->ie_start),
1616                                      WLAN_EID_FRAGMENT);
1617
1618         ieee80211_mle_get_sta_prof(elems, params->link_id);
1619         prof = elems->prof;
1620
1621         if (!prof)
1622                 return;
1623
1624         /* check if we have the 4 bytes for the fixed part in assoc response */
1625         if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) {
1626                 elems->prof = NULL;
1627                 elems->sta_prof_len = 0;
1628                 return;
1629         }
1630
1631         /*
1632          * Skip the capability information and the status code that are expected
1633          * as part of the station profile in association response frames. Note
1634          * the -1 is because the 'sta_info_len' is accounted to as part of the
1635          * per-STA profile, but not part of the 'u8 variable[]' portion.
1636          */
1637         sub.start = prof->variable + prof->sta_info_len - 1 + 4;
1638         end = (const u8 *)prof + elems->sta_prof_len;
1639         sub.len = end - sub.start;
1640
1641         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1642                                              sub.start, sub.len);
1643         _ieee802_11_parse_elems_full(&sub, elems, non_inherit);
1644 }
1645
1646 struct ieee802_11_elems *
1647 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1648 {
1649         struct ieee802_11_elems *elems;
1650         const struct element *non_inherit = NULL;
1651         u8 *nontransmitted_profile;
1652         int nontransmitted_profile_len = 0;
1653         size_t scratch_len = params->scratch_len ?: 3 * params->len;
1654
1655         elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC);
1656         if (!elems)
1657                 return NULL;
1658         elems->ie_start = params->start;
1659         elems->total_len = params->len;
1660         elems->scratch_len = scratch_len;
1661         elems->scratch_pos = elems->scratch;
1662
1663         nontransmitted_profile = elems->scratch_pos;
1664         nontransmitted_profile_len =
1665                 ieee802_11_find_bssid_profile(params->start, params->len,
1666                                               elems, params->bss,
1667                                               nontransmitted_profile);
1668         elems->scratch_pos += nontransmitted_profile_len;
1669         elems->scratch_len -= nontransmitted_profile_len;
1670         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1671                                              nontransmitted_profile,
1672                                              nontransmitted_profile_len);
1673
1674         elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1675
1676         /* Override with nontransmitted profile, if found */
1677         if (nontransmitted_profile_len) {
1678                 struct ieee80211_elems_parse_params sub = {
1679                         .start = nontransmitted_profile,
1680                         .len = nontransmitted_profile_len,
1681                         .action = params->action,
1682                         .link_id = params->link_id,
1683                 };
1684
1685                 _ieee802_11_parse_elems_full(&sub, elems, NULL);
1686         }
1687
1688         ieee80211_mle_parse_link(elems, params);
1689
1690         if (elems->tim && !elems->parse_error) {
1691                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1692
1693                 elems->dtim_period = tim_ie->dtim_period;
1694                 elems->dtim_count = tim_ie->dtim_count;
1695         }
1696
1697         /* Override DTIM period and count if needed */
1698         if (elems->bssid_index &&
1699             elems->bssid_index_len >=
1700             offsetofend(struct ieee80211_bssid_index, dtim_period))
1701                 elems->dtim_period = elems->bssid_index->dtim_period;
1702
1703         if (elems->bssid_index &&
1704             elems->bssid_index_len >=
1705             offsetofend(struct ieee80211_bssid_index, dtim_count))
1706                 elems->dtim_count = elems->bssid_index->dtim_count;
1707
1708         return elems;
1709 }
1710
1711 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1712                                            struct ieee80211_tx_queue_params
1713                                            *qparam, int ac)
1714 {
1715         struct ieee80211_chanctx_conf *chanctx_conf;
1716         const struct ieee80211_reg_rule *rrule;
1717         const struct ieee80211_wmm_ac *wmm_ac;
1718         u16 center_freq = 0;
1719
1720         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1721             sdata->vif.type != NL80211_IFTYPE_STATION)
1722                 return;
1723
1724         rcu_read_lock();
1725         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1726         if (chanctx_conf)
1727                 center_freq = chanctx_conf->def.chan->center_freq;
1728
1729         if (!center_freq) {
1730                 rcu_read_unlock();
1731                 return;
1732         }
1733
1734         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1735
1736         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1737                 rcu_read_unlock();
1738                 return;
1739         }
1740
1741         if (sdata->vif.type == NL80211_IFTYPE_AP)
1742                 wmm_ac = &rrule->wmm_rule.ap[ac];
1743         else
1744                 wmm_ac = &rrule->wmm_rule.client[ac];
1745         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1746         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1747         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1748         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1749         rcu_read_unlock();
1750 }
1751
1752 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1753                                bool bss_notify, bool enable_qos)
1754 {
1755         struct ieee80211_sub_if_data *sdata = link->sdata;
1756         struct ieee80211_local *local = sdata->local;
1757         struct ieee80211_tx_queue_params qparam;
1758         struct ieee80211_chanctx_conf *chanctx_conf;
1759         int ac;
1760         bool use_11b;
1761         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1762         int aCWmin, aCWmax;
1763
1764         if (!local->ops->conf_tx)
1765                 return;
1766
1767         if (local->hw.queues < IEEE80211_NUM_ACS)
1768                 return;
1769
1770         memset(&qparam, 0, sizeof(qparam));
1771
1772         rcu_read_lock();
1773         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1774         use_11b = (chanctx_conf &&
1775                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1776                  !link->operating_11g_mode;
1777         rcu_read_unlock();
1778
1779         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1780
1781         /* Set defaults according to 802.11-2007 Table 7-37 */
1782         aCWmax = 1023;
1783         if (use_11b)
1784                 aCWmin = 31;
1785         else
1786                 aCWmin = 15;
1787
1788         /* Confiure old 802.11b/g medium access rules. */
1789         qparam.cw_max = aCWmax;
1790         qparam.cw_min = aCWmin;
1791         qparam.txop = 0;
1792         qparam.aifs = 2;
1793
1794         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1795                 /* Update if QoS is enabled. */
1796                 if (enable_qos) {
1797                         switch (ac) {
1798                         case IEEE80211_AC_BK:
1799                                 qparam.cw_max = aCWmax;
1800                                 qparam.cw_min = aCWmin;
1801                                 qparam.txop = 0;
1802                                 if (is_ocb)
1803                                         qparam.aifs = 9;
1804                                 else
1805                                         qparam.aifs = 7;
1806                                 break;
1807                         /* never happens but let's not leave undefined */
1808                         default:
1809                         case IEEE80211_AC_BE:
1810                                 qparam.cw_max = aCWmax;
1811                                 qparam.cw_min = aCWmin;
1812                                 qparam.txop = 0;
1813                                 if (is_ocb)
1814                                         qparam.aifs = 6;
1815                                 else
1816                                         qparam.aifs = 3;
1817                                 break;
1818                         case IEEE80211_AC_VI:
1819                                 qparam.cw_max = aCWmin;
1820                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1821                                 if (is_ocb)
1822                                         qparam.txop = 0;
1823                                 else if (use_11b)
1824                                         qparam.txop = 6016/32;
1825                                 else
1826                                         qparam.txop = 3008/32;
1827
1828                                 if (is_ocb)
1829                                         qparam.aifs = 3;
1830                                 else
1831                                         qparam.aifs = 2;
1832                                 break;
1833                         case IEEE80211_AC_VO:
1834                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1835                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1836                                 if (is_ocb)
1837                                         qparam.txop = 0;
1838                                 else if (use_11b)
1839                                         qparam.txop = 3264/32;
1840                                 else
1841                                         qparam.txop = 1504/32;
1842                                 qparam.aifs = 2;
1843                                 break;
1844                         }
1845                 }
1846                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1847
1848                 qparam.uapsd = false;
1849
1850                 link->tx_conf[ac] = qparam;
1851                 drv_conf_tx(local, link, ac, &qparam);
1852         }
1853
1854         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1855             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1856             sdata->vif.type != NL80211_IFTYPE_NAN) {
1857                 link->conf->qos = enable_qos;
1858                 if (bss_notify)
1859                         ieee80211_link_info_change_notify(sdata, link,
1860                                                           BSS_CHANGED_QOS);
1861         }
1862 }
1863
1864 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1865                          u16 transaction, u16 auth_alg, u16 status,
1866                          const u8 *extra, size_t extra_len, const u8 *da,
1867                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1868                          u32 tx_flags)
1869 {
1870         struct ieee80211_local *local = sdata->local;
1871         struct sk_buff *skb;
1872         struct ieee80211_mgmt *mgmt;
1873         bool multi_link = sdata->vif.valid_links;
1874         struct {
1875                 u8 id;
1876                 u8 len;
1877                 u8 ext_id;
1878                 struct ieee80211_multi_link_elem ml;
1879                 struct ieee80211_mle_basic_common_info basic;
1880         } __packed mle = {
1881                 .id = WLAN_EID_EXTENSION,
1882                 .len = sizeof(mle) - 2,
1883                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1884                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1885                 .basic.len = sizeof(mle.basic),
1886         };
1887         int err;
1888
1889         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1890
1891         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1892         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1893                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1894                             multi_link * sizeof(mle));
1895         if (!skb)
1896                 return;
1897
1898         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1899
1900         mgmt = skb_put_zero(skb, 24 + 6);
1901         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1902                                           IEEE80211_STYPE_AUTH);
1903         memcpy(mgmt->da, da, ETH_ALEN);
1904         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1905         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1906         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1907         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1908         mgmt->u.auth.status_code = cpu_to_le16(status);
1909         if (extra)
1910                 skb_put_data(skb, extra, extra_len);
1911         if (multi_link)
1912                 skb_put_data(skb, &mle, sizeof(mle));
1913
1914         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1915                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1916                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1917                 if (WARN_ON(err)) {
1918                         kfree_skb(skb);
1919                         return;
1920                 }
1921         }
1922
1923         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1924                                         tx_flags;
1925         ieee80211_tx_skb(sdata, skb);
1926 }
1927
1928 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1929                                     const u8 *da, const u8 *bssid,
1930                                     u16 stype, u16 reason,
1931                                     bool send_frame, u8 *frame_buf)
1932 {
1933         struct ieee80211_local *local = sdata->local;
1934         struct sk_buff *skb;
1935         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1936
1937         /* build frame */
1938         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1939         mgmt->duration = 0; /* initialize only */
1940         mgmt->seq_ctrl = 0; /* initialize only */
1941         memcpy(mgmt->da, da, ETH_ALEN);
1942         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1943         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1944         /* u.deauth.reason_code == u.disassoc.reason_code */
1945         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1946
1947         if (send_frame) {
1948                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1949                                     IEEE80211_DEAUTH_FRAME_LEN);
1950                 if (!skb)
1951                         return;
1952
1953                 skb_reserve(skb, local->hw.extra_tx_headroom);
1954
1955                 /* copy in frame */
1956                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1957
1958                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1959                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1960                         IEEE80211_SKB_CB(skb)->flags |=
1961                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1962
1963                 ieee80211_tx_skb(sdata, skb);
1964         }
1965 }
1966
1967 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1968 {
1969         if ((end - pos) < 5)
1970                 return pos;
1971
1972         *pos++ = WLAN_EID_EXTENSION;
1973         *pos++ = 1 + sizeof(cap);
1974         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1975         memcpy(pos, &cap, sizeof(cap));
1976
1977         return pos + 2;
1978 }
1979
1980 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1981                                          u8 *buffer, size_t buffer_len,
1982                                          const u8 *ie, size_t ie_len,
1983                                          enum nl80211_band band,
1984                                          u32 rate_mask,
1985                                          struct cfg80211_chan_def *chandef,
1986                                          size_t *offset, u32 flags)
1987 {
1988         struct ieee80211_local *local = sdata->local;
1989         struct ieee80211_supported_band *sband;
1990         const struct ieee80211_sta_he_cap *he_cap;
1991         const struct ieee80211_sta_eht_cap *eht_cap;
1992         u8 *pos = buffer, *end = buffer + buffer_len;
1993         size_t noffset;
1994         int supp_rates_len, i;
1995         u8 rates[32];
1996         int num_rates;
1997         int ext_rates_len;
1998         int shift;
1999         u32 rate_flags;
2000         bool have_80mhz = false;
2001
2002         *offset = 0;
2003
2004         sband = local->hw.wiphy->bands[band];
2005         if (WARN_ON_ONCE(!sband))
2006                 return 0;
2007
2008         rate_flags = ieee80211_chandef_rate_flags(chandef);
2009         shift = ieee80211_chandef_get_shift(chandef);
2010
2011         num_rates = 0;
2012         for (i = 0; i < sband->n_bitrates; i++) {
2013                 if ((BIT(i) & rate_mask) == 0)
2014                         continue; /* skip rate */
2015                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2016                         continue;
2017
2018                 rates[num_rates++] =
2019                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
2020                                           (1 << shift) * 5);
2021         }
2022
2023         supp_rates_len = min_t(int, num_rates, 8);
2024
2025         if (end - pos < 2 + supp_rates_len)
2026                 goto out_err;
2027         *pos++ = WLAN_EID_SUPP_RATES;
2028         *pos++ = supp_rates_len;
2029         memcpy(pos, rates, supp_rates_len);
2030         pos += supp_rates_len;
2031
2032         /* insert "request information" if in custom IEs */
2033         if (ie && ie_len) {
2034                 static const u8 before_extrates[] = {
2035                         WLAN_EID_SSID,
2036                         WLAN_EID_SUPP_RATES,
2037                         WLAN_EID_REQUEST,
2038                 };
2039                 noffset = ieee80211_ie_split(ie, ie_len,
2040                                              before_extrates,
2041                                              ARRAY_SIZE(before_extrates),
2042                                              *offset);
2043                 if (end - pos < noffset - *offset)
2044                         goto out_err;
2045                 memcpy(pos, ie + *offset, noffset - *offset);
2046                 pos += noffset - *offset;
2047                 *offset = noffset;
2048         }
2049
2050         ext_rates_len = num_rates - supp_rates_len;
2051         if (ext_rates_len > 0) {
2052                 if (end - pos < 2 + ext_rates_len)
2053                         goto out_err;
2054                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2055                 *pos++ = ext_rates_len;
2056                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
2057                 pos += ext_rates_len;
2058         }
2059
2060         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
2061                 if (end - pos < 3)
2062                         goto out_err;
2063                 *pos++ = WLAN_EID_DS_PARAMS;
2064                 *pos++ = 1;
2065                 *pos++ = ieee80211_frequency_to_channel(
2066                                 chandef->chan->center_freq);
2067         }
2068
2069         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
2070                 goto done;
2071
2072         /* insert custom IEs that go before HT */
2073         if (ie && ie_len) {
2074                 static const u8 before_ht[] = {
2075                         /*
2076                          * no need to list the ones split off already
2077                          * (or generated here)
2078                          */
2079                         WLAN_EID_DS_PARAMS,
2080                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
2081                 };
2082                 noffset = ieee80211_ie_split(ie, ie_len,
2083                                              before_ht, ARRAY_SIZE(before_ht),
2084                                              *offset);
2085                 if (end - pos < noffset - *offset)
2086                         goto out_err;
2087                 memcpy(pos, ie + *offset, noffset - *offset);
2088                 pos += noffset - *offset;
2089                 *offset = noffset;
2090         }
2091
2092         if (sband->ht_cap.ht_supported) {
2093                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
2094                         goto out_err;
2095                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
2096                                                 sband->ht_cap.cap);
2097         }
2098
2099         /* insert custom IEs that go before VHT */
2100         if (ie && ie_len) {
2101                 static const u8 before_vht[] = {
2102                         /*
2103                          * no need to list the ones split off already
2104                          * (or generated here)
2105                          */
2106                         WLAN_EID_BSS_COEX_2040,
2107                         WLAN_EID_EXT_CAPABILITY,
2108                         WLAN_EID_SSID_LIST,
2109                         WLAN_EID_CHANNEL_USAGE,
2110                         WLAN_EID_INTERWORKING,
2111                         WLAN_EID_MESH_ID,
2112                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
2113                 };
2114                 noffset = ieee80211_ie_split(ie, ie_len,
2115                                              before_vht, ARRAY_SIZE(before_vht),
2116                                              *offset);
2117                 if (end - pos < noffset - *offset)
2118                         goto out_err;
2119                 memcpy(pos, ie + *offset, noffset - *offset);
2120                 pos += noffset - *offset;
2121                 *offset = noffset;
2122         }
2123
2124         /* Check if any channel in this sband supports at least 80 MHz */
2125         for (i = 0; i < sband->n_channels; i++) {
2126                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
2127                                                 IEEE80211_CHAN_NO_80MHZ))
2128                         continue;
2129
2130                 have_80mhz = true;
2131                 break;
2132         }
2133
2134         if (sband->vht_cap.vht_supported && have_80mhz) {
2135                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
2136                         goto out_err;
2137                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
2138                                                  sband->vht_cap.cap);
2139         }
2140
2141         /* insert custom IEs that go before HE */
2142         if (ie && ie_len) {
2143                 static const u8 before_he[] = {
2144                         /*
2145                          * no need to list the ones split off before VHT
2146                          * or generated here
2147                          */
2148                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
2149                         WLAN_EID_AP_CSN,
2150                         /* TODO: add 11ah/11aj/11ak elements */
2151                 };
2152                 noffset = ieee80211_ie_split(ie, ie_len,
2153                                              before_he, ARRAY_SIZE(before_he),
2154                                              *offset);
2155                 if (end - pos < noffset - *offset)
2156                         goto out_err;
2157                 memcpy(pos, ie + *offset, noffset - *offset);
2158                 pos += noffset - *offset;
2159                 *offset = noffset;
2160         }
2161
2162         he_cap = ieee80211_get_he_iftype_cap(sband,
2163                                              ieee80211_vif_type_p2p(&sdata->vif));
2164         if (he_cap &&
2165             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2166                                          IEEE80211_CHAN_NO_HE)) {
2167                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2168                 if (!pos)
2169                         goto out_err;
2170         }
2171
2172         eht_cap = ieee80211_get_eht_iftype_cap(sband,
2173                                                ieee80211_vif_type_p2p(&sdata->vif));
2174
2175         if (eht_cap &&
2176             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2177                                          IEEE80211_CHAN_NO_HE |
2178                                          IEEE80211_CHAN_NO_EHT)) {
2179                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end,
2180                                                  sdata->vif.type == NL80211_IFTYPE_AP);
2181                 if (!pos)
2182                         goto out_err;
2183         }
2184
2185         if (cfg80211_any_usable_channels(local->hw.wiphy,
2186                                          BIT(NL80211_BAND_6GHZ),
2187                                          IEEE80211_CHAN_NO_HE)) {
2188                 struct ieee80211_supported_band *sband6;
2189
2190                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2191                 he_cap = ieee80211_get_he_iftype_cap(sband6,
2192                                 ieee80211_vif_type_p2p(&sdata->vif));
2193
2194                 if (he_cap) {
2195                         enum nl80211_iftype iftype =
2196                                 ieee80211_vif_type_p2p(&sdata->vif);
2197                         __le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype);
2198
2199                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2200                 }
2201         }
2202
2203         /*
2204          * If adding more here, adjust code in main.c
2205          * that calculates local->scan_ies_len.
2206          */
2207
2208         return pos - buffer;
2209  out_err:
2210         WARN_ONCE(1, "not enough space for preq IEs\n");
2211  done:
2212         return pos - buffer;
2213 }
2214
2215 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2216                              size_t buffer_len,
2217                              struct ieee80211_scan_ies *ie_desc,
2218                              const u8 *ie, size_t ie_len,
2219                              u8 bands_used, u32 *rate_masks,
2220                              struct cfg80211_chan_def *chandef,
2221                              u32 flags)
2222 {
2223         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2224         int i;
2225
2226         memset(ie_desc, 0, sizeof(*ie_desc));
2227
2228         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2229                 if (bands_used & BIT(i)) {
2230                         pos += ieee80211_build_preq_ies_band(sdata,
2231                                                              buffer + pos,
2232                                                              buffer_len - pos,
2233                                                              ie, ie_len, i,
2234                                                              rate_masks[i],
2235                                                              chandef,
2236                                                              &custom_ie_offset,
2237                                                              flags);
2238                         ie_desc->ies[i] = buffer + old_pos;
2239                         ie_desc->len[i] = pos - old_pos;
2240                         old_pos = pos;
2241                 }
2242         }
2243
2244         /* add any remaining custom IEs */
2245         if (ie && ie_len) {
2246                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2247                               "not enough space for preq custom IEs\n"))
2248                         return pos;
2249                 memcpy(buffer + pos, ie + custom_ie_offset,
2250                        ie_len - custom_ie_offset);
2251                 ie_desc->common_ies = buffer + pos;
2252                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2253                 pos += ie_len - custom_ie_offset;
2254         }
2255
2256         return pos;
2257 };
2258
2259 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2260                                           const u8 *src, const u8 *dst,
2261                                           u32 ratemask,
2262                                           struct ieee80211_channel *chan,
2263                                           const u8 *ssid, size_t ssid_len,
2264                                           const u8 *ie, size_t ie_len,
2265                                           u32 flags)
2266 {
2267         struct ieee80211_local *local = sdata->local;
2268         struct cfg80211_chan_def chandef;
2269         struct sk_buff *skb;
2270         struct ieee80211_mgmt *mgmt;
2271         int ies_len;
2272         u32 rate_masks[NUM_NL80211_BANDS] = {};
2273         struct ieee80211_scan_ies dummy_ie_desc;
2274
2275         /*
2276          * Do not send DS Channel parameter for directed probe requests
2277          * in order to maximize the chance that we get a response.  Some
2278          * badly-behaved APs don't respond when this parameter is included.
2279          */
2280         chandef.width = sdata->vif.bss_conf.chandef.width;
2281         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2282                 chandef.chan = NULL;
2283         else
2284                 chandef.chan = chan;
2285
2286         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2287                                      local->scan_ies_len + ie_len);
2288         if (!skb)
2289                 return NULL;
2290
2291         rate_masks[chan->band] = ratemask;
2292         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2293                                            skb_tailroom(skb), &dummy_ie_desc,
2294                                            ie, ie_len, BIT(chan->band),
2295                                            rate_masks, &chandef, flags);
2296         skb_put(skb, ies_len);
2297
2298         if (dst) {
2299                 mgmt = (struct ieee80211_mgmt *) skb->data;
2300                 memcpy(mgmt->da, dst, ETH_ALEN);
2301                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2302         }
2303
2304         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2305
2306         return skb;
2307 }
2308
2309 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2310                             struct ieee802_11_elems *elems,
2311                             enum nl80211_band band, u32 *basic_rates)
2312 {
2313         struct ieee80211_supported_band *sband;
2314         size_t num_rates;
2315         u32 supp_rates, rate_flags;
2316         int i, j, shift;
2317
2318         sband = sdata->local->hw.wiphy->bands[band];
2319         if (WARN_ON(!sband))
2320                 return 1;
2321
2322         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2323         shift = ieee80211_vif_get_shift(&sdata->vif);
2324
2325         num_rates = sband->n_bitrates;
2326         supp_rates = 0;
2327         for (i = 0; i < elems->supp_rates_len +
2328                      elems->ext_supp_rates_len; i++) {
2329                 u8 rate = 0;
2330                 int own_rate;
2331                 bool is_basic;
2332                 if (i < elems->supp_rates_len)
2333                         rate = elems->supp_rates[i];
2334                 else if (elems->ext_supp_rates)
2335                         rate = elems->ext_supp_rates
2336                                 [i - elems->supp_rates_len];
2337                 own_rate = 5 * (rate & 0x7f);
2338                 is_basic = !!(rate & 0x80);
2339
2340                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2341                         continue;
2342
2343                 for (j = 0; j < num_rates; j++) {
2344                         int brate;
2345                         if ((rate_flags & sband->bitrates[j].flags)
2346                             != rate_flags)
2347                                 continue;
2348
2349                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2350                                              1 << shift);
2351
2352                         if (brate == own_rate) {
2353                                 supp_rates |= BIT(j);
2354                                 if (basic_rates && is_basic)
2355                                         *basic_rates |= BIT(j);
2356                         }
2357                 }
2358         }
2359         return supp_rates;
2360 }
2361
2362 void ieee80211_stop_device(struct ieee80211_local *local)
2363 {
2364         ieee80211_led_radio(local, false);
2365         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2366
2367         cancel_work_sync(&local->reconfig_filter);
2368
2369         flush_workqueue(local->workqueue);
2370         drv_stop(local);
2371 }
2372
2373 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2374                                            bool aborted)
2375 {
2376         /* It's possible that we don't handle the scan completion in
2377          * time during suspend, so if it's still marked as completed
2378          * here, queue the work and flush it to clean things up.
2379          * Instead of calling the worker function directly here, we
2380          * really queue it to avoid potential races with other flows
2381          * scheduling the same work.
2382          */
2383         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2384                 /* If coming from reconfiguration failure, abort the scan so
2385                  * we don't attempt to continue a partial HW scan - which is
2386                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2387                  * completed scan, and a 5 GHz portion is still pending.
2388                  */
2389                 if (aborted)
2390                         set_bit(SCAN_ABORTED, &local->scanning);
2391                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2392                 flush_delayed_work(&local->scan_work);
2393         }
2394 }
2395
2396 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2397 {
2398         struct ieee80211_sub_if_data *sdata;
2399         struct ieee80211_chanctx *ctx;
2400
2401         /*
2402          * We get here if during resume the device can't be restarted properly.
2403          * We might also get here if this happens during HW reset, which is a
2404          * slightly different situation and we need to drop all connections in
2405          * the latter case.
2406          *
2407          * Ask cfg80211 to turn off all interfaces, this will result in more
2408          * warnings but at least we'll then get into a clean stopped state.
2409          */
2410
2411         local->resuming = false;
2412         local->suspended = false;
2413         local->in_reconfig = false;
2414
2415         ieee80211_flush_completed_scan(local, true);
2416
2417         /* scheduled scan clearly can't be running any more, but tell
2418          * cfg80211 and clear local state
2419          */
2420         ieee80211_sched_scan_end(local);
2421
2422         list_for_each_entry(sdata, &local->interfaces, list)
2423                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2424
2425         /* Mark channel contexts as not being in the driver any more to avoid
2426          * removing them from the driver during the shutdown process...
2427          */
2428         mutex_lock(&local->chanctx_mtx);
2429         list_for_each_entry(ctx, &local->chanctx_list, list)
2430                 ctx->driver_present = false;
2431         mutex_unlock(&local->chanctx_mtx);
2432 }
2433
2434 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2435                                      struct ieee80211_sub_if_data *sdata,
2436                                      struct ieee80211_link_data *link)
2437 {
2438         struct ieee80211_chanctx_conf *conf;
2439         struct ieee80211_chanctx *ctx;
2440
2441         if (!local->use_chanctx)
2442                 return;
2443
2444         mutex_lock(&local->chanctx_mtx);
2445         conf = rcu_dereference_protected(link->conf->chanctx_conf,
2446                                          lockdep_is_held(&local->chanctx_mtx));
2447         if (conf) {
2448                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2449                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2450         }
2451         mutex_unlock(&local->chanctx_mtx);
2452 }
2453
2454 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2455 {
2456         struct ieee80211_local *local = sdata->local;
2457         struct sta_info *sta;
2458
2459         /* add STAs back */
2460         mutex_lock(&local->sta_mtx);
2461         list_for_each_entry(sta, &local->sta_list, list) {
2462                 enum ieee80211_sta_state state;
2463
2464                 if (!sta->uploaded || sta->sdata != sdata)
2465                         continue;
2466
2467                 for (state = IEEE80211_STA_NOTEXIST;
2468                      state < sta->sta_state; state++)
2469                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2470                                               state + 1));
2471         }
2472         mutex_unlock(&local->sta_mtx);
2473 }
2474
2475 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2476 {
2477         struct cfg80211_nan_func *func, **funcs;
2478         int res, id, i = 0;
2479
2480         res = drv_start_nan(sdata->local, sdata,
2481                             &sdata->u.nan.conf);
2482         if (WARN_ON(res))
2483                 return res;
2484
2485         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2486                         sizeof(*funcs),
2487                         GFP_KERNEL);
2488         if (!funcs)
2489                 return -ENOMEM;
2490
2491         /* Add all the functions:
2492          * This is a little bit ugly. We need to call a potentially sleeping
2493          * callback for each NAN function, so we can't hold the spinlock.
2494          */
2495         spin_lock_bh(&sdata->u.nan.func_lock);
2496
2497         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2498                 funcs[i++] = func;
2499
2500         spin_unlock_bh(&sdata->u.nan.func_lock);
2501
2502         for (i = 0; funcs[i]; i++) {
2503                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2504                 if (WARN_ON(res))
2505                         ieee80211_nan_func_terminated(&sdata->vif,
2506                                                       funcs[i]->instance_id,
2507                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2508                                                       GFP_KERNEL);
2509         }
2510
2511         kfree(funcs);
2512
2513         return 0;
2514 }
2515
2516 int ieee80211_reconfig(struct ieee80211_local *local)
2517 {
2518         struct ieee80211_hw *hw = &local->hw;
2519         struct ieee80211_sub_if_data *sdata;
2520         struct ieee80211_chanctx *ctx;
2521         struct sta_info *sta;
2522         int res, i;
2523         bool reconfig_due_to_wowlan = false;
2524         struct ieee80211_sub_if_data *sched_scan_sdata;
2525         struct cfg80211_sched_scan_request *sched_scan_req;
2526         bool sched_scan_stopped = false;
2527         bool suspended = local->suspended;
2528         bool in_reconfig = false;
2529
2530         /* nothing to do if HW shouldn't run */
2531         if (!local->open_count)
2532                 goto wake_up;
2533
2534 #ifdef CONFIG_PM
2535         if (suspended)
2536                 local->resuming = true;
2537
2538         if (local->wowlan) {
2539                 /*
2540                  * In the wowlan case, both mac80211 and the device
2541                  * are functional when the resume op is called, so
2542                  * clear local->suspended so the device could operate
2543                  * normally (e.g. pass rx frames).
2544                  */
2545                 local->suspended = false;
2546                 res = drv_resume(local);
2547                 local->wowlan = false;
2548                 if (res < 0) {
2549                         local->resuming = false;
2550                         return res;
2551                 }
2552                 if (res == 0)
2553                         goto wake_up;
2554                 WARN_ON(res > 1);
2555                 /*
2556                  * res is 1, which means the driver requested
2557                  * to go through a regular reset on wakeup.
2558                  * restore local->suspended in this case.
2559                  */
2560                 reconfig_due_to_wowlan = true;
2561                 local->suspended = true;
2562         }
2563 #endif
2564
2565         /*
2566          * In case of hw_restart during suspend (without wowlan),
2567          * cancel restart work, as we are reconfiguring the device
2568          * anyway.
2569          * Note that restart_work is scheduled on a frozen workqueue,
2570          * so we can't deadlock in this case.
2571          */
2572         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2573                 cancel_work_sync(&local->restart_work);
2574
2575         local->started = false;
2576
2577         /*
2578          * Upon resume hardware can sometimes be goofy due to
2579          * various platform / driver / bus issues, so restarting
2580          * the device may at times not work immediately. Propagate
2581          * the error.
2582          */
2583         res = drv_start(local);
2584         if (res) {
2585                 if (suspended)
2586                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2587                 else
2588                         WARN(1, "Hardware became unavailable during restart.\n");
2589                 ieee80211_handle_reconfig_failure(local);
2590                 return res;
2591         }
2592
2593         /* setup fragmentation threshold */
2594         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2595
2596         /* setup RTS threshold */
2597         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2598
2599         /* reset coverage class */
2600         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2601
2602         ieee80211_led_radio(local, true);
2603         ieee80211_mod_tpt_led_trig(local,
2604                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2605
2606         /* add interfaces */
2607         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2608         if (sdata) {
2609                 /* in HW restart it exists already */
2610                 WARN_ON(local->resuming);
2611                 res = drv_add_interface(local, sdata);
2612                 if (WARN_ON(res)) {
2613                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2614                         synchronize_net();
2615                         kfree(sdata);
2616                 }
2617         }
2618
2619         list_for_each_entry(sdata, &local->interfaces, list) {
2620                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2621                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2622                     ieee80211_sdata_running(sdata)) {
2623                         res = drv_add_interface(local, sdata);
2624                         if (WARN_ON(res))
2625                                 break;
2626                 }
2627         }
2628
2629         /* If adding any of the interfaces failed above, roll back and
2630          * report failure.
2631          */
2632         if (res) {
2633                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2634                                                      list)
2635                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2636                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2637                             ieee80211_sdata_running(sdata))
2638                                 drv_remove_interface(local, sdata);
2639                 ieee80211_handle_reconfig_failure(local);
2640                 return res;
2641         }
2642
2643         /* add channel contexts */
2644         if (local->use_chanctx) {
2645                 mutex_lock(&local->chanctx_mtx);
2646                 list_for_each_entry(ctx, &local->chanctx_list, list)
2647                         if (ctx->replace_state !=
2648                             IEEE80211_CHANCTX_REPLACES_OTHER)
2649                                 WARN_ON(drv_add_chanctx(local, ctx));
2650                 mutex_unlock(&local->chanctx_mtx);
2651
2652                 sdata = wiphy_dereference(local->hw.wiphy,
2653                                           local->monitor_sdata);
2654                 if (sdata && ieee80211_sdata_running(sdata))
2655                         ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2656         }
2657
2658         /* reconfigure hardware */
2659         ieee80211_hw_config(local, ~0);
2660
2661         ieee80211_configure_filter(local);
2662
2663         /* Finally also reconfigure all the BSS information */
2664         list_for_each_entry(sdata, &local->interfaces, list) {
2665                 unsigned int link_id;
2666                 u32 changed;
2667
2668                 if (!ieee80211_sdata_running(sdata))
2669                         continue;
2670
2671                 sdata_lock(sdata);
2672                 for (link_id = 0;
2673                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
2674                      link_id++) {
2675                         struct ieee80211_link_data *link;
2676
2677                         link = sdata_dereference(sdata->link[link_id], sdata);
2678                         if (link)
2679                                 ieee80211_assign_chanctx(local, sdata, link);
2680                 }
2681
2682                 switch (sdata->vif.type) {
2683                 case NL80211_IFTYPE_AP_VLAN:
2684                 case NL80211_IFTYPE_MONITOR:
2685                         break;
2686                 case NL80211_IFTYPE_ADHOC:
2687                         if (sdata->vif.cfg.ibss_joined)
2688                                 WARN_ON(drv_join_ibss(local, sdata));
2689                         fallthrough;
2690                 default:
2691                         ieee80211_reconfig_stations(sdata);
2692                         fallthrough;
2693                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2694                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2695                                 drv_conf_tx(local, &sdata->deflink, i,
2696                                             &sdata->deflink.tx_conf[i]);
2697                         break;
2698                 }
2699                 sdata_unlock(sdata);
2700
2701                 /* common change flags for all interface types */
2702                 changed = BSS_CHANGED_ERP_CTS_PROT |
2703                           BSS_CHANGED_ERP_PREAMBLE |
2704                           BSS_CHANGED_ERP_SLOT |
2705                           BSS_CHANGED_HT |
2706                           BSS_CHANGED_BASIC_RATES |
2707                           BSS_CHANGED_BEACON_INT |
2708                           BSS_CHANGED_BSSID |
2709                           BSS_CHANGED_CQM |
2710                           BSS_CHANGED_QOS |
2711                           BSS_CHANGED_IDLE |
2712                           BSS_CHANGED_TXPOWER |
2713                           BSS_CHANGED_MCAST_RATE;
2714
2715                 if (sdata->vif.bss_conf.mu_mimo_owner)
2716                         changed |= BSS_CHANGED_MU_GROUPS;
2717
2718                 switch (sdata->vif.type) {
2719                 case NL80211_IFTYPE_STATION:
2720                         changed |= BSS_CHANGED_ASSOC |
2721                                    BSS_CHANGED_ARP_FILTER |
2722                                    BSS_CHANGED_PS;
2723
2724                         /* Re-send beacon info report to the driver */
2725                         if (sdata->deflink.u.mgd.have_beacon)
2726                                 changed |= BSS_CHANGED_BEACON_INFO;
2727
2728                         if (sdata->vif.bss_conf.max_idle_period ||
2729                             sdata->vif.bss_conf.protected_keep_alive)
2730                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2731
2732                         sdata_lock(sdata);
2733                         ieee80211_bss_info_change_notify(sdata, changed);
2734                         sdata_unlock(sdata);
2735                         break;
2736                 case NL80211_IFTYPE_OCB:
2737                         changed |= BSS_CHANGED_OCB;
2738                         ieee80211_bss_info_change_notify(sdata, changed);
2739                         break;
2740                 case NL80211_IFTYPE_ADHOC:
2741                         changed |= BSS_CHANGED_IBSS;
2742                         fallthrough;
2743                 case NL80211_IFTYPE_AP:
2744                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2745
2746                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2747                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2748                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2749                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2750
2751                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2752                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2753
2754                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2755                                         drv_start_ap(local, sdata,
2756                                                      sdata->deflink.conf);
2757                         }
2758                         fallthrough;
2759                 case NL80211_IFTYPE_MESH_POINT:
2760                         if (sdata->vif.bss_conf.enable_beacon) {
2761                                 changed |= BSS_CHANGED_BEACON |
2762                                            BSS_CHANGED_BEACON_ENABLED;
2763                                 ieee80211_bss_info_change_notify(sdata, changed);
2764                         }
2765                         break;
2766                 case NL80211_IFTYPE_NAN:
2767                         res = ieee80211_reconfig_nan(sdata);
2768                         if (res < 0) {
2769                                 ieee80211_handle_reconfig_failure(local);
2770                                 return res;
2771                         }
2772                         break;
2773                 case NL80211_IFTYPE_AP_VLAN:
2774                 case NL80211_IFTYPE_MONITOR:
2775                 case NL80211_IFTYPE_P2P_DEVICE:
2776                         /* nothing to do */
2777                         break;
2778                 case NL80211_IFTYPE_UNSPECIFIED:
2779                 case NUM_NL80211_IFTYPES:
2780                 case NL80211_IFTYPE_P2P_CLIENT:
2781                 case NL80211_IFTYPE_P2P_GO:
2782                 case NL80211_IFTYPE_WDS:
2783                         WARN_ON(1);
2784                         break;
2785                 }
2786         }
2787
2788         ieee80211_recalc_ps(local);
2789
2790         /*
2791          * The sta might be in psm against the ap (e.g. because
2792          * this was the state before a hw restart), so we
2793          * explicitly send a null packet in order to make sure
2794          * it'll sync against the ap (and get out of psm).
2795          */
2796         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2797                 list_for_each_entry(sdata, &local->interfaces, list) {
2798                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2799                                 continue;
2800                         if (!sdata->u.mgd.associated)
2801                                 continue;
2802
2803                         ieee80211_send_nullfunc(local, sdata, false);
2804                 }
2805         }
2806
2807         /* APs are now beaconing, add back stations */
2808         list_for_each_entry(sdata, &local->interfaces, list) {
2809                 if (!ieee80211_sdata_running(sdata))
2810                         continue;
2811
2812                 sdata_lock(sdata);
2813                 switch (sdata->vif.type) {
2814                 case NL80211_IFTYPE_AP_VLAN:
2815                 case NL80211_IFTYPE_AP:
2816                         ieee80211_reconfig_stations(sdata);
2817                         break;
2818                 default:
2819                         break;
2820                 }
2821                 sdata_unlock(sdata);
2822         }
2823
2824         /* add back keys */
2825         list_for_each_entry(sdata, &local->interfaces, list)
2826                 ieee80211_reenable_keys(sdata);
2827
2828         /* Reconfigure sched scan if it was interrupted by FW restart */
2829         mutex_lock(&local->mtx);
2830         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2831                                                 lockdep_is_held(&local->mtx));
2832         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2833                                                 lockdep_is_held(&local->mtx));
2834         if (sched_scan_sdata && sched_scan_req)
2835                 /*
2836                  * Sched scan stopped, but we don't want to report it. Instead,
2837                  * we're trying to reschedule. However, if more than one scan
2838                  * plan was set, we cannot reschedule since we don't know which
2839                  * scan plan was currently running (and some scan plans may have
2840                  * already finished).
2841                  */
2842                 if (sched_scan_req->n_scan_plans > 1 ||
2843                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2844                                                          sched_scan_req)) {
2845                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2846                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2847                         sched_scan_stopped = true;
2848                 }
2849         mutex_unlock(&local->mtx);
2850
2851         if (sched_scan_stopped)
2852                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2853
2854  wake_up:
2855
2856         if (local->monitors == local->open_count && local->monitors > 0)
2857                 ieee80211_add_virtual_monitor(local);
2858
2859         /*
2860          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2861          * sessions can be established after a resume.
2862          *
2863          * Also tear down aggregation sessions since reconfiguring
2864          * them in a hardware restart scenario is not easily done
2865          * right now, and the hardware will have lost information
2866          * about the sessions, but we and the AP still think they
2867          * are active. This is really a workaround though.
2868          */
2869         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2870                 mutex_lock(&local->sta_mtx);
2871
2872                 list_for_each_entry(sta, &local->sta_list, list) {
2873                         if (!local->resuming)
2874                                 ieee80211_sta_tear_down_BA_sessions(
2875                                                 sta, AGG_STOP_LOCAL_REQUEST);
2876                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2877                 }
2878
2879                 mutex_unlock(&local->sta_mtx);
2880         }
2881
2882         /*
2883          * If this is for hw restart things are still running.
2884          * We may want to change that later, however.
2885          */
2886         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2887                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2888
2889         if (local->in_reconfig) {
2890                 in_reconfig = local->in_reconfig;
2891                 local->in_reconfig = false;
2892                 barrier();
2893
2894                 /* Restart deferred ROCs */
2895                 mutex_lock(&local->mtx);
2896                 ieee80211_start_next_roc(local);
2897                 mutex_unlock(&local->mtx);
2898
2899                 /* Requeue all works */
2900                 list_for_each_entry(sdata, &local->interfaces, list)
2901                         ieee80211_queue_work(&local->hw, &sdata->work);
2902         }
2903
2904         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2905                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2906                                         false);
2907
2908         if (in_reconfig) {
2909                 list_for_each_entry(sdata, &local->interfaces, list) {
2910                         if (!ieee80211_sdata_running(sdata))
2911                                 continue;
2912                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2913                                 ieee80211_sta_restart(sdata);
2914                 }
2915         }
2916
2917         if (!suspended)
2918                 return 0;
2919
2920 #ifdef CONFIG_PM
2921         /* first set suspended false, then resuming */
2922         local->suspended = false;
2923         mb();
2924         local->resuming = false;
2925
2926         ieee80211_flush_completed_scan(local, false);
2927
2928         if (local->open_count && !reconfig_due_to_wowlan)
2929                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2930
2931         list_for_each_entry(sdata, &local->interfaces, list) {
2932                 if (!ieee80211_sdata_running(sdata))
2933                         continue;
2934                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2935                         ieee80211_sta_restart(sdata);
2936         }
2937
2938         mod_timer(&local->sta_cleanup, jiffies + 1);
2939 #else
2940         WARN_ON(1);
2941 #endif
2942
2943         return 0;
2944 }
2945
2946 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2947 {
2948         struct ieee80211_sub_if_data *sdata;
2949         struct ieee80211_local *local;
2950         struct ieee80211_key *key;
2951
2952         if (WARN_ON(!vif))
2953                 return;
2954
2955         sdata = vif_to_sdata(vif);
2956         local = sdata->local;
2957
2958         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2959                     !local->resuming))
2960                 return;
2961
2962         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2963                     !local->in_reconfig))
2964                 return;
2965
2966         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2967                 return;
2968
2969         sdata->flags |= flag;
2970
2971         mutex_lock(&local->key_mtx);
2972         list_for_each_entry(key, &sdata->key_list, list)
2973                 key->flags |= KEY_FLAG_TAINTED;
2974         mutex_unlock(&local->key_mtx);
2975 }
2976
2977 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2978 {
2979         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2980 }
2981 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2982
2983 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2984 {
2985         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2986 }
2987 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2988
2989 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2990                            struct ieee80211_link_data *link)
2991 {
2992         struct ieee80211_local *local = sdata->local;
2993         struct ieee80211_chanctx_conf *chanctx_conf;
2994         struct ieee80211_chanctx *chanctx;
2995
2996         mutex_lock(&local->chanctx_mtx);
2997
2998         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2999                                                  lockdep_is_held(&local->chanctx_mtx));
3000
3001         /*
3002          * This function can be called from a work, thus it may be possible
3003          * that the chanctx_conf is removed (due to a disconnection, for
3004          * example).
3005          * So nothing should be done in such case.
3006          */
3007         if (!chanctx_conf)
3008                 goto unlock;
3009
3010         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
3011         ieee80211_recalc_smps_chanctx(local, chanctx);
3012  unlock:
3013         mutex_unlock(&local->chanctx_mtx);
3014 }
3015
3016 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
3017                                   int link_id)
3018 {
3019         struct ieee80211_local *local = sdata->local;
3020         struct ieee80211_chanctx_conf *chanctx_conf;
3021         struct ieee80211_chanctx *chanctx;
3022         int i;
3023
3024         mutex_lock(&local->chanctx_mtx);
3025
3026         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
3027                 struct ieee80211_bss_conf *bss_conf;
3028
3029                 if (link_id >= 0 && link_id != i)
3030                         continue;
3031
3032                 rcu_read_lock();
3033                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
3034                 if (!bss_conf) {
3035                         rcu_read_unlock();
3036                         continue;
3037                 }
3038
3039                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
3040                                                          lockdep_is_held(&local->chanctx_mtx));
3041                 /*
3042                  * Since we hold the chanctx_mtx (checked above)
3043                  * we can take the chanctx_conf pointer out of the
3044                  * RCU critical section, it cannot go away without
3045                  * the mutex. Just the way we reached it could - in
3046                  * theory - go away, but we don't really care and
3047                  * it really shouldn't happen anyway.
3048                  */
3049                 rcu_read_unlock();
3050
3051                 if (!chanctx_conf)
3052                         goto unlock;
3053
3054                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
3055                                        conf);
3056                 ieee80211_recalc_chanctx_min_def(local, chanctx);
3057         }
3058  unlock:
3059         mutex_unlock(&local->chanctx_mtx);
3060 }
3061
3062 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
3063 {
3064         size_t pos = offset;
3065
3066         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
3067                 pos += 2 + ies[pos + 1];
3068
3069         return pos;
3070 }
3071
3072 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3073                               u16 cap)
3074 {
3075         __le16 tmp;
3076
3077         *pos++ = WLAN_EID_HT_CAPABILITY;
3078         *pos++ = sizeof(struct ieee80211_ht_cap);
3079         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
3080
3081         /* capability flags */
3082         tmp = cpu_to_le16(cap);
3083         memcpy(pos, &tmp, sizeof(u16));
3084         pos += sizeof(u16);
3085
3086         /* AMPDU parameters */
3087         *pos++ = ht_cap->ampdu_factor |
3088                  (ht_cap->ampdu_density <<
3089                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
3090
3091         /* MCS set */
3092         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
3093         pos += sizeof(ht_cap->mcs);
3094
3095         /* extended capabilities */
3096         pos += sizeof(__le16);
3097
3098         /* BF capabilities */
3099         pos += sizeof(__le32);
3100
3101         /* antenna selection */
3102         pos += sizeof(u8);
3103
3104         return pos;
3105 }
3106
3107 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3108                                u32 cap)
3109 {
3110         __le32 tmp;
3111
3112         *pos++ = WLAN_EID_VHT_CAPABILITY;
3113         *pos++ = sizeof(struct ieee80211_vht_cap);
3114         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
3115
3116         /* capability flags */
3117         tmp = cpu_to_le32(cap);
3118         memcpy(pos, &tmp, sizeof(u32));
3119         pos += sizeof(u32);
3120
3121         /* VHT MCS set */
3122         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
3123         pos += sizeof(vht_cap->vht_mcs);
3124
3125         return pos;
3126 }
3127
3128 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
3129 {
3130         const struct ieee80211_sta_he_cap *he_cap;
3131         struct ieee80211_supported_band *sband;
3132         u8 n;
3133
3134         sband = ieee80211_get_sband(sdata);
3135         if (!sband)
3136                 return 0;
3137
3138         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3139         if (!he_cap)
3140                 return 0;
3141
3142         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
3143         return 2 + 1 +
3144                sizeof(he_cap->he_cap_elem) + n +
3145                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3146                                      he_cap->he_cap_elem.phy_cap_info);
3147 }
3148
3149 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
3150                               const struct ieee80211_sta_he_cap *he_cap,
3151                               u8 *end)
3152 {
3153         struct ieee80211_he_cap_elem elem;
3154         u8 n;
3155         u8 ie_len;
3156         u8 *orig_pos = pos;
3157
3158         /* Make sure we have place for the IE */
3159         /*
3160          * TODO: the 1 added is because this temporarily is under the EXTENSION
3161          * IE. Get rid of it when it moves.
3162          */
3163         if (!he_cap)
3164                 return orig_pos;
3165
3166         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
3167         elem = he_cap->he_cap_elem;
3168
3169         if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3170                 elem.phy_cap_info[0] &=
3171                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3172                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3173
3174         if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3175                 elem.phy_cap_info[0] &=
3176                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3177
3178         if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3179                 elem.phy_cap_info[0] &=
3180                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3181
3182         n = ieee80211_he_mcs_nss_size(&elem);
3183         ie_len = 2 + 1 +
3184                  sizeof(he_cap->he_cap_elem) + n +
3185                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3186                                        he_cap->he_cap_elem.phy_cap_info);
3187
3188         if ((end - pos) < ie_len)
3189                 return orig_pos;
3190
3191         *pos++ = WLAN_EID_EXTENSION;
3192         pos++; /* We'll set the size later below */
3193         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3194
3195         /* Fixed data */
3196         memcpy(pos, &elem, sizeof(elem));
3197         pos += sizeof(elem);
3198
3199         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3200         pos += n;
3201
3202         /* Check if PPE Threshold should be present */
3203         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3204              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3205                 goto end;
3206
3207         /*
3208          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3209          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3210          */
3211         n = hweight8(he_cap->ppe_thres[0] &
3212                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3213         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3214                    IEEE80211_PPE_THRES_NSS_POS));
3215
3216         /*
3217          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3218          * total size.
3219          */
3220         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3221         n = DIV_ROUND_UP(n, 8);
3222
3223         /* Copy PPE Thresholds */
3224         memcpy(pos, &he_cap->ppe_thres, n);
3225         pos += n;
3226
3227 end:
3228         orig_pos[1] = (pos - orig_pos) - 2;
3229         return pos;
3230 }
3231
3232 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3233                                     enum ieee80211_smps_mode smps_mode,
3234                                     struct sk_buff *skb)
3235 {
3236         struct ieee80211_supported_band *sband;
3237         const struct ieee80211_sband_iftype_data *iftd;
3238         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3239         u8 *pos;
3240         u16 cap;
3241
3242         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3243                                           BIT(NL80211_BAND_6GHZ),
3244                                           IEEE80211_CHAN_NO_HE))
3245                 return;
3246
3247         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3248
3249         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3250         if (!iftd)
3251                 return;
3252
3253         /* Check for device HE 6 GHz capability before adding element */
3254         if (!iftd->he_6ghz_capa.capa)
3255                 return;
3256
3257         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3258         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3259
3260         switch (smps_mode) {
3261         case IEEE80211_SMPS_AUTOMATIC:
3262         case IEEE80211_SMPS_NUM_MODES:
3263                 WARN_ON(1);
3264                 fallthrough;
3265         case IEEE80211_SMPS_OFF:
3266                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3267                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3268                 break;
3269         case IEEE80211_SMPS_STATIC:
3270                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3271                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3272                 break;
3273         case IEEE80211_SMPS_DYNAMIC:
3274                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3275                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3276                 break;
3277         }
3278
3279         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3280         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3281                                     pos + 2 + 1 + sizeof(cap));
3282 }
3283
3284 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3285                                const struct cfg80211_chan_def *chandef,
3286                                u16 prot_mode, bool rifs_mode)
3287 {
3288         struct ieee80211_ht_operation *ht_oper;
3289         /* Build HT Information */
3290         *pos++ = WLAN_EID_HT_OPERATION;
3291         *pos++ = sizeof(struct ieee80211_ht_operation);
3292         ht_oper = (struct ieee80211_ht_operation *)pos;
3293         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3294                                         chandef->chan->center_freq);
3295         switch (chandef->width) {
3296         case NL80211_CHAN_WIDTH_160:
3297         case NL80211_CHAN_WIDTH_80P80:
3298         case NL80211_CHAN_WIDTH_80:
3299         case NL80211_CHAN_WIDTH_40:
3300                 if (chandef->center_freq1 > chandef->chan->center_freq)
3301                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3302                 else
3303                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3304                 break;
3305         case NL80211_CHAN_WIDTH_320:
3306                 /* HT information element should not be included on 6GHz */
3307                 WARN_ON(1);
3308                 return pos;
3309         default:
3310                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3311                 break;
3312         }
3313         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3314             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3315             chandef->width != NL80211_CHAN_WIDTH_20)
3316                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3317
3318         if (rifs_mode)
3319                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3320
3321         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3322         ht_oper->stbc_param = 0x0000;
3323
3324         /* It seems that Basic MCS set and Supported MCS set
3325            are identical for the first 10 bytes */
3326         memset(&ht_oper->basic_set, 0, 16);
3327         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3328
3329         return pos + sizeof(struct ieee80211_ht_operation);
3330 }
3331
3332 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3333                                    const struct cfg80211_chan_def *chandef)
3334 {
3335         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3336         *pos++ = 3;                                     /* IE length */
3337         /* New channel width */
3338         switch (chandef->width) {
3339         case NL80211_CHAN_WIDTH_80:
3340                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3341                 break;
3342         case NL80211_CHAN_WIDTH_160:
3343                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3344                 break;
3345         case NL80211_CHAN_WIDTH_80P80:
3346                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3347                 break;
3348         case NL80211_CHAN_WIDTH_320:
3349                 /* The behavior is not defined for 320 MHz channels */
3350                 WARN_ON(1);
3351                 fallthrough;
3352         default:
3353                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3354         }
3355
3356         /* new center frequency segment 0 */
3357         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3358         /* new center frequency segment 1 */
3359         if (chandef->center_freq2)
3360                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3361         else
3362                 *pos++ = 0;
3363 }
3364
3365 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3366                                 const struct cfg80211_chan_def *chandef)
3367 {
3368         struct ieee80211_vht_operation *vht_oper;
3369
3370         *pos++ = WLAN_EID_VHT_OPERATION;
3371         *pos++ = sizeof(struct ieee80211_vht_operation);
3372         vht_oper = (struct ieee80211_vht_operation *)pos;
3373         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3374                                                         chandef->center_freq1);
3375         if (chandef->center_freq2)
3376                 vht_oper->center_freq_seg1_idx =
3377                         ieee80211_frequency_to_channel(chandef->center_freq2);
3378         else
3379                 vht_oper->center_freq_seg1_idx = 0x00;
3380
3381         switch (chandef->width) {
3382         case NL80211_CHAN_WIDTH_160:
3383                 /*
3384                  * Convert 160 MHz channel width to new style as interop
3385                  * workaround.
3386                  */
3387                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3388                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3389                 if (chandef->chan->center_freq < chandef->center_freq1)
3390                         vht_oper->center_freq_seg0_idx -= 8;
3391                 else
3392                         vht_oper->center_freq_seg0_idx += 8;
3393                 break;
3394         case NL80211_CHAN_WIDTH_80P80:
3395                 /*
3396                  * Convert 80+80 MHz channel width to new style as interop
3397                  * workaround.
3398                  */
3399                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3400                 break;
3401         case NL80211_CHAN_WIDTH_80:
3402                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3403                 break;
3404         case NL80211_CHAN_WIDTH_320:
3405                 /* VHT information element should not be included on 6GHz */
3406                 WARN_ON(1);
3407                 return pos;
3408         default:
3409                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3410                 break;
3411         }
3412
3413         /* don't require special VHT peer rates */
3414         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3415
3416         return pos + sizeof(struct ieee80211_vht_operation);
3417 }
3418
3419 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3420 {
3421         struct ieee80211_he_operation *he_oper;
3422         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3423         u32 he_oper_params;
3424         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3425
3426         if (chandef->chan->band == NL80211_BAND_6GHZ)
3427                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3428
3429         *pos++ = WLAN_EID_EXTENSION;
3430         *pos++ = ie_len;
3431         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3432
3433         he_oper_params = 0;
3434         he_oper_params |= u32_encode_bits(1023, /* disabled */
3435                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3436         he_oper_params |= u32_encode_bits(1,
3437                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3438         he_oper_params |= u32_encode_bits(1,
3439                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3440         if (chandef->chan->band == NL80211_BAND_6GHZ)
3441                 he_oper_params |= u32_encode_bits(1,
3442                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3443
3444         he_oper = (struct ieee80211_he_operation *)pos;
3445         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3446
3447         /* don't require special HE peer rates */
3448         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3449         pos += sizeof(struct ieee80211_he_operation);
3450
3451         if (chandef->chan->band != NL80211_BAND_6GHZ)
3452                 goto out;
3453
3454         /* TODO add VHT operational */
3455         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3456         he_6ghz_op->minrate = 6; /* 6 Mbps */
3457         he_6ghz_op->primary =
3458                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3459         he_6ghz_op->ccfs0 =
3460                 ieee80211_frequency_to_channel(chandef->center_freq1);
3461         if (chandef->center_freq2)
3462                 he_6ghz_op->ccfs1 =
3463                         ieee80211_frequency_to_channel(chandef->center_freq2);
3464         else
3465                 he_6ghz_op->ccfs1 = 0;
3466
3467         switch (chandef->width) {
3468         case NL80211_CHAN_WIDTH_320:
3469                 /*
3470                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3471                  * channels.
3472                  */
3473                 WARN_ON(1);
3474                 break;
3475         case NL80211_CHAN_WIDTH_160:
3476                 /* Convert 160 MHz channel width to new style as interop
3477                  * workaround.
3478                  */
3479                 he_6ghz_op->control =
3480                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3481                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3482                 if (chandef->chan->center_freq < chandef->center_freq1)
3483                         he_6ghz_op->ccfs0 -= 8;
3484                 else
3485                         he_6ghz_op->ccfs0 += 8;
3486                 fallthrough;
3487         case NL80211_CHAN_WIDTH_80P80:
3488                 he_6ghz_op->control =
3489                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3490                 break;
3491         case NL80211_CHAN_WIDTH_80:
3492                 he_6ghz_op->control =
3493                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3494                 break;
3495         case NL80211_CHAN_WIDTH_40:
3496                 he_6ghz_op->control =
3497                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3498                 break;
3499         default:
3500                 he_6ghz_op->control =
3501                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3502                 break;
3503         }
3504
3505         pos += sizeof(struct ieee80211_he_6ghz_oper);
3506
3507 out:
3508         return pos;
3509 }
3510
3511 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3512                                struct cfg80211_chan_def *chandef)
3513 {
3514         enum nl80211_channel_type channel_type;
3515
3516         if (!ht_oper)
3517                 return false;
3518
3519         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3520         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3521                 channel_type = NL80211_CHAN_HT20;
3522                 break;
3523         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3524                 channel_type = NL80211_CHAN_HT40PLUS;
3525                 break;
3526         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3527                 channel_type = NL80211_CHAN_HT40MINUS;
3528                 break;
3529         default:
3530                 return false;
3531         }
3532
3533         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3534         return true;
3535 }
3536
3537 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3538                                 const struct ieee80211_vht_operation *oper,
3539                                 const struct ieee80211_ht_operation *htop,
3540                                 struct cfg80211_chan_def *chandef)
3541 {
3542         struct cfg80211_chan_def new = *chandef;
3543         int cf0, cf1;
3544         int ccfs0, ccfs1, ccfs2;
3545         int ccf0, ccf1;
3546         u32 vht_cap;
3547         bool support_80_80 = false;
3548         bool support_160 = false;
3549         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3550                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3551         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3552                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3553
3554         if (!oper || !htop)
3555                 return false;
3556
3557         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3558         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3559                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3560         support_80_80 = ((vht_cap &
3561                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3562                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3563                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3564                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3565                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3566         ccfs0 = oper->center_freq_seg0_idx;
3567         ccfs1 = oper->center_freq_seg1_idx;
3568         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3569                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3570                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3571
3572         ccf0 = ccfs0;
3573
3574         /* if not supported, parse as though we didn't understand it */
3575         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3576                 ext_nss_bw_supp = 0;
3577
3578         /*
3579          * Cf. IEEE 802.11 Table 9-250
3580          *
3581          * We really just consider that because it's inefficient to connect
3582          * at a higher bandwidth than we'll actually be able to use.
3583          */
3584         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3585         default:
3586         case 0x00:
3587                 ccf1 = 0;
3588                 support_160 = false;
3589                 support_80_80 = false;
3590                 break;
3591         case 0x01:
3592                 support_80_80 = false;
3593                 fallthrough;
3594         case 0x02:
3595         case 0x03:
3596                 ccf1 = ccfs2;
3597                 break;
3598         case 0x10:
3599                 ccf1 = ccfs1;
3600                 break;
3601         case 0x11:
3602         case 0x12:
3603                 if (!ccfs1)
3604                         ccf1 = ccfs2;
3605                 else
3606                         ccf1 = ccfs1;
3607                 break;
3608         case 0x13:
3609         case 0x20:
3610         case 0x23:
3611                 ccf1 = ccfs1;
3612                 break;
3613         }
3614
3615         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3616         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3617
3618         switch (oper->chan_width) {
3619         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3620                 /* just use HT information directly */
3621                 break;
3622         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3623                 new.width = NL80211_CHAN_WIDTH_80;
3624                 new.center_freq1 = cf0;
3625                 /* If needed, adjust based on the newer interop workaround. */
3626                 if (ccf1) {
3627                         unsigned int diff;
3628
3629                         diff = abs(ccf1 - ccf0);
3630                         if ((diff == 8) && support_160) {
3631                                 new.width = NL80211_CHAN_WIDTH_160;
3632                                 new.center_freq1 = cf1;
3633                         } else if ((diff > 8) && support_80_80) {
3634                                 new.width = NL80211_CHAN_WIDTH_80P80;
3635                                 new.center_freq2 = cf1;
3636                         }
3637                 }
3638                 break;
3639         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3640                 /* deprecated encoding */
3641                 new.width = NL80211_CHAN_WIDTH_160;
3642                 new.center_freq1 = cf0;
3643                 break;
3644         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3645                 /* deprecated encoding */
3646                 new.width = NL80211_CHAN_WIDTH_80P80;
3647                 new.center_freq1 = cf0;
3648                 new.center_freq2 = cf1;
3649                 break;
3650         default:
3651                 return false;
3652         }
3653
3654         if (!cfg80211_chandef_valid(&new))
3655                 return false;
3656
3657         *chandef = new;
3658         return true;
3659 }
3660
3661 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper,
3662                                 bool support_160, bool support_320,
3663                                 struct cfg80211_chan_def *chandef)
3664 {
3665         struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
3666
3667         chandef->center_freq1 =
3668                 ieee80211_channel_to_frequency(info->ccfs0,
3669                                                chandef->chan->band);
3670
3671         switch (u8_get_bits(info->control,
3672                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3673         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3674                 chandef->width = NL80211_CHAN_WIDTH_20;
3675                 break;
3676         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3677                 chandef->width = NL80211_CHAN_WIDTH_40;
3678                 break;
3679         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3680                 chandef->width = NL80211_CHAN_WIDTH_80;
3681                 break;
3682         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3683                 if (support_160) {
3684                         chandef->width = NL80211_CHAN_WIDTH_160;
3685                         chandef->center_freq1 =
3686                                 ieee80211_channel_to_frequency(info->ccfs1,
3687                                                                chandef->chan->band);
3688                 } else {
3689                         chandef->width = NL80211_CHAN_WIDTH_80;
3690                 }
3691                 break;
3692         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3693                 if (support_320) {
3694                         chandef->width = NL80211_CHAN_WIDTH_320;
3695                         chandef->center_freq1 =
3696                                 ieee80211_channel_to_frequency(info->ccfs1,
3697                                                                chandef->chan->band);
3698                 } else if (support_160) {
3699                         chandef->width = NL80211_CHAN_WIDTH_160;
3700                 } else {
3701                         chandef->width = NL80211_CHAN_WIDTH_80;
3702
3703                         if (chandef->center_freq1 > chandef->chan->center_freq)
3704                                 chandef->center_freq1 -= 40;
3705                         else
3706                                 chandef->center_freq1 += 40;
3707                 }
3708                 break;
3709         }
3710 }
3711
3712 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3713                                     const struct ieee80211_he_operation *he_oper,
3714                                     const struct ieee80211_eht_operation *eht_oper,
3715                                     struct cfg80211_chan_def *chandef)
3716 {
3717         struct ieee80211_local *local = sdata->local;
3718         struct ieee80211_supported_band *sband;
3719         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3720         const struct ieee80211_sta_he_cap *he_cap;
3721         const struct ieee80211_sta_eht_cap *eht_cap;
3722         struct cfg80211_chan_def he_chandef = *chandef;
3723         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3724         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3725         bool support_80_80, support_160, support_320;
3726         u8 he_phy_cap, eht_phy_cap;
3727         u32 freq;
3728
3729         if (chandef->chan->band != NL80211_BAND_6GHZ)
3730                 return true;
3731
3732         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3733
3734         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3735         if (!he_cap) {
3736                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3737                 return false;
3738         }
3739
3740         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3741         support_160 =
3742                 he_phy_cap &
3743                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3744         support_80_80 =
3745                 he_phy_cap &
3746                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3747
3748         if (!he_oper) {
3749                 sdata_info(sdata,
3750                            "HE is not advertised on (on %d MHz), expect issues\n",
3751                            chandef->chan->center_freq);
3752                 return false;
3753         }
3754
3755         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3756         if (!eht_cap) {
3757                 sdata_info(sdata, "Missing iftype sband data/EHT cap");
3758                 eht_oper = NULL;
3759         }
3760
3761         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3762
3763         if (!he_6ghz_oper) {
3764                 sdata_info(sdata,
3765                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3766                            chandef->chan->center_freq);
3767                 return false;
3768         }
3769
3770         /*
3771          * The EHT operation IE does not contain the primary channel so the
3772          * primary channel frequency should be taken from the 6 GHz operation
3773          * information.
3774          */
3775         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3776                                               NL80211_BAND_6GHZ);
3777         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3778
3779         switch (u8_get_bits(he_6ghz_oper->control,
3780                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3781         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3782                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3783                 break;
3784         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3785                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3786                 break;
3787         default:
3788                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3789                 break;
3790         }
3791
3792         if (!eht_oper ||
3793             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3794                 switch (u8_get_bits(he_6ghz_oper->control,
3795                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3796                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3797                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3798                         break;
3799                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3800                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3801                         break;
3802                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3803                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3804                         break;
3805                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3806                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3807                         if (!he_6ghz_oper->ccfs1)
3808                                 break;
3809                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3810                                 if (support_160)
3811                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3812                         } else {
3813                                 if (support_80_80)
3814                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3815                         }
3816                         break;
3817                 }
3818
3819                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3820                         he_chandef.center_freq1 =
3821                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3822                                                                NL80211_BAND_6GHZ);
3823                 } else {
3824                         he_chandef.center_freq1 =
3825                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3826                                                                NL80211_BAND_6GHZ);
3827                         if (support_80_80 || support_160)
3828                                 he_chandef.center_freq2 =
3829                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3830                                                                        NL80211_BAND_6GHZ);
3831                 }
3832         } else {
3833                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3834                 support_320 =
3835                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3836
3837                 ieee80211_chandef_eht_oper(eht_oper, support_160,
3838                                            support_320, &he_chandef);
3839         }
3840
3841         if (!cfg80211_chandef_valid(&he_chandef)) {
3842                 sdata_info(sdata,
3843                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3844                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3845                            he_chandef.width,
3846                            he_chandef.center_freq1,
3847                            he_chandef.center_freq2);
3848                 return false;
3849         }
3850
3851         *chandef = he_chandef;
3852
3853         return true;
3854 }
3855
3856 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3857                                 struct cfg80211_chan_def *chandef)
3858 {
3859         u32 oper_freq;
3860
3861         if (!oper)
3862                 return false;
3863
3864         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3865         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3866                 chandef->width = NL80211_CHAN_WIDTH_1;
3867                 break;
3868         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3869                 chandef->width = NL80211_CHAN_WIDTH_2;
3870                 break;
3871         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3872                 chandef->width = NL80211_CHAN_WIDTH_4;
3873                 break;
3874         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3875                 chandef->width = NL80211_CHAN_WIDTH_8;
3876                 break;
3877         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3878                 chandef->width = NL80211_CHAN_WIDTH_16;
3879                 break;
3880         default:
3881                 return false;
3882         }
3883
3884         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3885                                                   NL80211_BAND_S1GHZ);
3886         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3887         chandef->freq1_offset = oper_freq % 1000;
3888
3889         return true;
3890 }
3891
3892 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
3893                              const struct ieee80211_supported_band *sband,
3894                              const u8 *srates, int srates_len, u32 *rates)
3895 {
3896         u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
3897         int shift = ieee80211_chanwidth_get_shift(width);
3898         struct ieee80211_rate *br;
3899         int brate, rate, i, j, count = 0;
3900
3901         *rates = 0;
3902
3903         for (i = 0; i < srates_len; i++) {
3904                 rate = srates[i] & 0x7f;
3905
3906                 for (j = 0; j < sband->n_bitrates; j++) {
3907                         br = &sband->bitrates[j];
3908                         if ((rate_flags & br->flags) != rate_flags)
3909                                 continue;
3910
3911                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3912                         if (brate == rate) {
3913                                 *rates |= BIT(j);
3914                                 count++;
3915                                 break;
3916                         }
3917                 }
3918         }
3919         return count;
3920 }
3921
3922 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3923                             struct sk_buff *skb, bool need_basic,
3924                             enum nl80211_band band)
3925 {
3926         struct ieee80211_local *local = sdata->local;
3927         struct ieee80211_supported_band *sband;
3928         int rate, shift;
3929         u8 i, rates, *pos;
3930         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3931         u32 rate_flags;
3932
3933         shift = ieee80211_vif_get_shift(&sdata->vif);
3934         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3935         sband = local->hw.wiphy->bands[band];
3936         rates = 0;
3937         for (i = 0; i < sband->n_bitrates; i++) {
3938                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3939                         continue;
3940                 rates++;
3941         }
3942         if (rates > 8)
3943                 rates = 8;
3944
3945         if (skb_tailroom(skb) < rates + 2)
3946                 return -ENOMEM;
3947
3948         pos = skb_put(skb, rates + 2);
3949         *pos++ = WLAN_EID_SUPP_RATES;
3950         *pos++ = rates;
3951         for (i = 0; i < rates; i++) {
3952                 u8 basic = 0;
3953                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3954                         continue;
3955
3956                 if (need_basic && basic_rates & BIT(i))
3957                         basic = 0x80;
3958                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3959                                     5 * (1 << shift));
3960                 *pos++ = basic | (u8) rate;
3961         }
3962
3963         return 0;
3964 }
3965
3966 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3967                                 struct sk_buff *skb, bool need_basic,
3968                                 enum nl80211_band band)
3969 {
3970         struct ieee80211_local *local = sdata->local;
3971         struct ieee80211_supported_band *sband;
3972         int rate, shift;
3973         u8 i, exrates, *pos;
3974         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3975         u32 rate_flags;
3976
3977         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3978         shift = ieee80211_vif_get_shift(&sdata->vif);
3979
3980         sband = local->hw.wiphy->bands[band];
3981         exrates = 0;
3982         for (i = 0; i < sband->n_bitrates; i++) {
3983                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3984                         continue;
3985                 exrates++;
3986         }
3987
3988         if (exrates > 8)
3989                 exrates -= 8;
3990         else
3991                 exrates = 0;
3992
3993         if (skb_tailroom(skb) < exrates + 2)
3994                 return -ENOMEM;
3995
3996         if (exrates) {
3997                 pos = skb_put(skb, exrates + 2);
3998                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3999                 *pos++ = exrates;
4000                 for (i = 8; i < sband->n_bitrates; i++) {
4001                         u8 basic = 0;
4002                         if ((rate_flags & sband->bitrates[i].flags)
4003                             != rate_flags)
4004                                 continue;
4005                         if (need_basic && basic_rates & BIT(i))
4006                                 basic = 0x80;
4007                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
4008                                             5 * (1 << shift));
4009                         *pos++ = basic | (u8) rate;
4010                 }
4011         }
4012         return 0;
4013 }
4014
4015 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
4016 {
4017         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4018
4019         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
4020                 return 0;
4021
4022         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
4023 }
4024 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
4025
4026 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
4027 {
4028         if (!mcs)
4029                 return 1;
4030
4031         /* TODO: consider rx_highest */
4032
4033         if (mcs->rx_mask[3])
4034                 return 4;
4035         if (mcs->rx_mask[2])
4036                 return 3;
4037         if (mcs->rx_mask[1])
4038                 return 2;
4039         return 1;
4040 }
4041
4042 /**
4043  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
4044  * @local: mac80211 hw info struct
4045  * @status: RX status
4046  * @mpdu_len: total MPDU length (including FCS)
4047  * @mpdu_offset: offset into MPDU to calculate timestamp at
4048  *
4049  * This function calculates the RX timestamp at the given MPDU offset, taking
4050  * into account what the RX timestamp was. An offset of 0 will just normalize
4051  * the timestamp to TSF at beginning of MPDU reception.
4052  */
4053 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
4054                                      struct ieee80211_rx_status *status,
4055                                      unsigned int mpdu_len,
4056                                      unsigned int mpdu_offset)
4057 {
4058         u64 ts = status->mactime;
4059         struct rate_info ri;
4060         u16 rate;
4061         u8 n_ltf;
4062
4063         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
4064                 return 0;
4065
4066         memset(&ri, 0, sizeof(ri));
4067
4068         ri.bw = status->bw;
4069
4070         /* Fill cfg80211 rate info */
4071         switch (status->encoding) {
4072         case RX_ENC_HE:
4073                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
4074                 ri.mcs = status->rate_idx;
4075                 ri.nss = status->nss;
4076                 ri.he_ru_alloc = status->he_ru;
4077                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4078                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4079
4080                 /*
4081                  * See P802.11ax_D6.0, section 27.3.4 for
4082                  * VHT PPDU format.
4083                  */
4084                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4085                         mpdu_offset += 2;
4086                         ts += 36;
4087
4088                         /*
4089                          * TODO:
4090                          * For HE MU PPDU, add the HE-SIG-B.
4091                          * For HE ER PPDU, add 8us for the HE-SIG-A.
4092                          * For HE TB PPDU, add 4us for the HE-STF.
4093                          * Add the HE-LTF durations - variable.
4094                          */
4095                 }
4096
4097                 break;
4098         case RX_ENC_HT:
4099                 ri.mcs = status->rate_idx;
4100                 ri.flags |= RATE_INFO_FLAGS_MCS;
4101                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4102                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4103
4104                 /*
4105                  * See P802.11REVmd_D3.0, section 19.3.2 for
4106                  * HT PPDU format.
4107                  */
4108                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4109                         mpdu_offset += 2;
4110                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
4111                                 ts += 24;
4112                         else
4113                                 ts += 32;
4114
4115                         /*
4116                          * Add Data HT-LTFs per streams
4117                          * TODO: add Extension HT-LTFs, 4us per LTF
4118                          */
4119                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
4120                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
4121                         ts += n_ltf * 4;
4122                 }
4123
4124                 break;
4125         case RX_ENC_VHT:
4126                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
4127                 ri.mcs = status->rate_idx;
4128                 ri.nss = status->nss;
4129                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4130                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4131
4132                 /*
4133                  * See P802.11REVmd_D3.0, section 21.3.2 for
4134                  * VHT PPDU format.
4135                  */
4136                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4137                         mpdu_offset += 2;
4138                         ts += 36;
4139
4140                         /*
4141                          * Add VHT-LTFs per streams
4142                          */
4143                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
4144                                 ri.nss + 1 : ri.nss;
4145                         ts += 4 * n_ltf;
4146                 }
4147
4148                 break;
4149         default:
4150                 WARN_ON(1);
4151                 fallthrough;
4152         case RX_ENC_LEGACY: {
4153                 struct ieee80211_supported_band *sband;
4154                 int shift = 0;
4155                 int bitrate;
4156
4157                 switch (status->bw) {
4158                 case RATE_INFO_BW_10:
4159                         shift = 1;
4160                         break;
4161                 case RATE_INFO_BW_5:
4162                         shift = 2;
4163                         break;
4164                 }
4165
4166                 sband = local->hw.wiphy->bands[status->band];
4167                 bitrate = sband->bitrates[status->rate_idx].bitrate;
4168                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
4169
4170                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4171                         if (status->band == NL80211_BAND_5GHZ) {
4172                                 ts += 20 << shift;
4173                                 mpdu_offset += 2;
4174                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4175                                 ts += 96;
4176                         } else {
4177                                 ts += 192;
4178                         }
4179                 }
4180                 break;
4181                 }
4182         }
4183
4184         rate = cfg80211_calculate_bitrate(&ri);
4185         if (WARN_ONCE(!rate,
4186                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4187                       (unsigned long long)status->flag, status->rate_idx,
4188                       status->nss))
4189                 return 0;
4190
4191         /* rewind from end of MPDU */
4192         if (status->flag & RX_FLAG_MACTIME_END)
4193                 ts -= mpdu_len * 8 * 10 / rate;
4194
4195         ts += mpdu_offset * 8 * 10 / rate;
4196
4197         return ts;
4198 }
4199
4200 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4201 {
4202         struct ieee80211_sub_if_data *sdata;
4203         struct cfg80211_chan_def chandef;
4204
4205         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4206         lockdep_assert_wiphy(local->hw.wiphy);
4207
4208         mutex_lock(&local->mtx);
4209         list_for_each_entry(sdata, &local->interfaces, list) {
4210                 /* it might be waiting for the local->mtx, but then
4211                  * by the time it gets it, sdata->wdev.cac_started
4212                  * will no longer be true
4213                  */
4214                 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work);
4215
4216                 if (sdata->wdev.cac_started) {
4217                         chandef = sdata->vif.bss_conf.chandef;
4218                         ieee80211_link_release_channel(&sdata->deflink);
4219                         cfg80211_cac_event(sdata->dev,
4220                                            &chandef,
4221                                            NL80211_RADAR_CAC_ABORTED,
4222                                            GFP_KERNEL);
4223                 }
4224         }
4225         mutex_unlock(&local->mtx);
4226 }
4227
4228 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4229 {
4230         struct ieee80211_local *local =
4231                 container_of(work, struct ieee80211_local, radar_detected_work);
4232         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4233         struct ieee80211_chanctx *ctx;
4234         int num_chanctx = 0;
4235
4236         mutex_lock(&local->chanctx_mtx);
4237         list_for_each_entry(ctx, &local->chanctx_list, list) {
4238                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4239                         continue;
4240
4241                 num_chanctx++;
4242                 chandef = ctx->conf.def;
4243         }
4244         mutex_unlock(&local->chanctx_mtx);
4245
4246         wiphy_lock(local->hw.wiphy);
4247         ieee80211_dfs_cac_cancel(local);
4248         wiphy_unlock(local->hw.wiphy);
4249
4250         if (num_chanctx > 1)
4251                 /* XXX: multi-channel is not supported yet */
4252                 WARN_ON(1);
4253         else
4254                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4255 }
4256
4257 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4258 {
4259         struct ieee80211_local *local = hw_to_local(hw);
4260
4261         trace_api_radar_detected(local);
4262
4263         schedule_work(&local->radar_detected_work);
4264 }
4265 EXPORT_SYMBOL(ieee80211_radar_detected);
4266
4267 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4268 {
4269         ieee80211_conn_flags_t ret;
4270         int tmp;
4271
4272         switch (c->width) {
4273         case NL80211_CHAN_WIDTH_20:
4274                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4275                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4276                 break;
4277         case NL80211_CHAN_WIDTH_40:
4278                 c->width = NL80211_CHAN_WIDTH_20;
4279                 c->center_freq1 = c->chan->center_freq;
4280                 ret = IEEE80211_CONN_DISABLE_40MHZ |
4281                       IEEE80211_CONN_DISABLE_VHT;
4282                 break;
4283         case NL80211_CHAN_WIDTH_80:
4284                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4285                 /* n_P40 */
4286                 tmp /= 2;
4287                 /* freq_P40 */
4288                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4289                 c->width = NL80211_CHAN_WIDTH_40;
4290                 ret = IEEE80211_CONN_DISABLE_VHT;
4291                 break;
4292         case NL80211_CHAN_WIDTH_80P80:
4293                 c->center_freq2 = 0;
4294                 c->width = NL80211_CHAN_WIDTH_80;
4295                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4296                       IEEE80211_CONN_DISABLE_160MHZ;
4297                 break;
4298         case NL80211_CHAN_WIDTH_160:
4299                 /* n_P20 */
4300                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4301                 /* n_P80 */
4302                 tmp /= 4;
4303                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4304                 c->width = NL80211_CHAN_WIDTH_80;
4305                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4306                       IEEE80211_CONN_DISABLE_160MHZ;
4307                 break;
4308         case NL80211_CHAN_WIDTH_320:
4309                 /* n_P20 */
4310                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4311                 /* n_P160 */
4312                 tmp /= 8;
4313                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4314                 c->width = NL80211_CHAN_WIDTH_160;
4315                 ret = IEEE80211_CONN_DISABLE_320MHZ;
4316                 break;
4317         default:
4318         case NL80211_CHAN_WIDTH_20_NOHT:
4319                 WARN_ON_ONCE(1);
4320                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4321                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4322                 break;
4323         case NL80211_CHAN_WIDTH_1:
4324         case NL80211_CHAN_WIDTH_2:
4325         case NL80211_CHAN_WIDTH_4:
4326         case NL80211_CHAN_WIDTH_8:
4327         case NL80211_CHAN_WIDTH_16:
4328         case NL80211_CHAN_WIDTH_5:
4329         case NL80211_CHAN_WIDTH_10:
4330                 WARN_ON_ONCE(1);
4331                 /* keep c->width */
4332                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4333                 break;
4334         }
4335
4336         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4337
4338         return ret;
4339 }
4340
4341 /*
4342  * Returns true if smps_mode_new is strictly more restrictive than
4343  * smps_mode_old.
4344  */
4345 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4346                                    enum ieee80211_smps_mode smps_mode_new)
4347 {
4348         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4349                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4350                 return false;
4351
4352         switch (smps_mode_old) {
4353         case IEEE80211_SMPS_STATIC:
4354                 return false;
4355         case IEEE80211_SMPS_DYNAMIC:
4356                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4357         case IEEE80211_SMPS_OFF:
4358                 return smps_mode_new != IEEE80211_SMPS_OFF;
4359         default:
4360                 WARN_ON(1);
4361         }
4362
4363         return false;
4364 }
4365
4366 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4367                               struct cfg80211_csa_settings *csa_settings)
4368 {
4369         struct sk_buff *skb;
4370         struct ieee80211_mgmt *mgmt;
4371         struct ieee80211_local *local = sdata->local;
4372         int freq;
4373         int hdr_len = offsetofend(struct ieee80211_mgmt,
4374                                   u.action.u.chan_switch);
4375         u8 *pos;
4376
4377         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4378             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4379                 return -EOPNOTSUPP;
4380
4381         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4382                             5 + /* channel switch announcement element */
4383                             3 + /* secondary channel offset element */
4384                             5 + /* wide bandwidth channel switch announcement */
4385                             8); /* mesh channel switch parameters element */
4386         if (!skb)
4387                 return -ENOMEM;
4388
4389         skb_reserve(skb, local->tx_headroom);
4390         mgmt = skb_put_zero(skb, hdr_len);
4391         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4392                                           IEEE80211_STYPE_ACTION);
4393
4394         eth_broadcast_addr(mgmt->da);
4395         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4396         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4397                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4398         } else {
4399                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4400                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4401         }
4402         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4403         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4404         pos = skb_put(skb, 5);
4405         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4406         *pos++ = 3;                                             /* IE length */
4407         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4408         freq = csa_settings->chandef.chan->center_freq;
4409         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4410         *pos++ = csa_settings->count;                           /* count */
4411
4412         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4413                 enum nl80211_channel_type ch_type;
4414
4415                 skb_put(skb, 3);
4416                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4417                 *pos++ = 1;                                     /* IE length */
4418                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4419                 if (ch_type == NL80211_CHAN_HT40PLUS)
4420                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4421                 else
4422                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4423         }
4424
4425         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4426                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4427
4428                 skb_put(skb, 8);
4429                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4430                 *pos++ = 6;                                     /* IE length */
4431                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4432                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4433                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4434                 *pos++ |= csa_settings->block_tx ?
4435                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4436                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4437                 pos += 2;
4438                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4439                 pos += 2;
4440         }
4441
4442         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4443             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4444             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4445                 skb_put(skb, 5);
4446                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4447         }
4448
4449         ieee80211_tx_skb(sdata, skb);
4450         return 0;
4451 }
4452
4453 static bool
4454 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4455 {
4456         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4457         int skip;
4458
4459         if (end > 0)
4460                 return false;
4461
4462         /* One shot NOA  */
4463         if (data->count[i] == 1)
4464                 return false;
4465
4466         if (data->desc[i].interval == 0)
4467                 return false;
4468
4469         /* End time is in the past, check for repetitions */
4470         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4471         if (data->count[i] < 255) {
4472                 if (data->count[i] <= skip) {
4473                         data->count[i] = 0;
4474                         return false;
4475                 }
4476
4477                 data->count[i] -= skip;
4478         }
4479
4480         data->desc[i].start += skip * data->desc[i].interval;
4481
4482         return true;
4483 }
4484
4485 static bool
4486 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4487                              s32 *offset)
4488 {
4489         bool ret = false;
4490         int i;
4491
4492         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4493                 s32 cur;
4494
4495                 if (!data->count[i])
4496                         continue;
4497
4498                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4499                         ret = true;
4500
4501                 cur = data->desc[i].start - tsf;
4502                 if (cur > *offset)
4503                         continue;
4504
4505                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4506                 if (cur > *offset)
4507                         *offset = cur;
4508         }
4509
4510         return ret;
4511 }
4512
4513 static u32
4514 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4515 {
4516         s32 offset = 0;
4517         int tries = 0;
4518         /*
4519          * arbitrary limit, used to avoid infinite loops when combined NoA
4520          * descriptors cover the full time period.
4521          */
4522         int max_tries = 5;
4523
4524         ieee80211_extend_absent_time(data, tsf, &offset);
4525         do {
4526                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4527                         break;
4528
4529                 tries++;
4530         } while (tries < max_tries);
4531
4532         return offset;
4533 }
4534
4535 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4536 {
4537         u32 next_offset = BIT(31) - 1;
4538         int i;
4539
4540         data->absent = 0;
4541         data->has_next_tsf = false;
4542         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4543                 s32 start;
4544
4545                 if (!data->count[i])
4546                         continue;
4547
4548                 ieee80211_extend_noa_desc(data, tsf, i);
4549                 start = data->desc[i].start - tsf;
4550                 if (start <= 0)
4551                         data->absent |= BIT(i);
4552
4553                 if (next_offset > start)
4554                         next_offset = start;
4555
4556                 data->has_next_tsf = true;
4557         }
4558
4559         if (data->absent)
4560                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4561
4562         data->next_tsf = tsf + next_offset;
4563 }
4564 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4565
4566 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4567                             struct ieee80211_noa_data *data, u32 tsf)
4568 {
4569         int ret = 0;
4570         int i;
4571
4572         memset(data, 0, sizeof(*data));
4573
4574         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4575                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4576
4577                 if (!desc->count || !desc->duration)
4578                         continue;
4579
4580                 data->count[i] = desc->count;
4581                 data->desc[i].start = le32_to_cpu(desc->start_time);
4582                 data->desc[i].duration = le32_to_cpu(desc->duration);
4583                 data->desc[i].interval = le32_to_cpu(desc->interval);
4584
4585                 if (data->count[i] > 1 &&
4586                     data->desc[i].interval < data->desc[i].duration)
4587                         continue;
4588
4589                 ieee80211_extend_noa_desc(data, tsf, i);
4590                 ret++;
4591         }
4592
4593         if (ret)
4594                 ieee80211_update_p2p_noa(data, tsf);
4595
4596         return ret;
4597 }
4598 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4599
4600 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4601                            struct ieee80211_sub_if_data *sdata)
4602 {
4603         u64 tsf = drv_get_tsf(local, sdata);
4604         u64 dtim_count = 0;
4605         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4606         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4607         struct ps_data *ps;
4608         u8 bcns_from_dtim;
4609
4610         if (tsf == -1ULL || !beacon_int || !dtim_period)
4611                 return;
4612
4613         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4614             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4615                 if (!sdata->bss)
4616                         return;
4617
4618                 ps = &sdata->bss->ps;
4619         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4620                 ps = &sdata->u.mesh.ps;
4621         } else {
4622                 return;
4623         }
4624
4625         /*
4626          * actually finds last dtim_count, mac80211 will update in
4627          * __beacon_add_tim().
4628          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4629          */
4630         do_div(tsf, beacon_int);
4631         bcns_from_dtim = do_div(tsf, dtim_period);
4632         /* just had a DTIM */
4633         if (!bcns_from_dtim)
4634                 dtim_count = 0;
4635         else
4636                 dtim_count = dtim_period - bcns_from_dtim;
4637
4638         ps->dtim_count = dtim_count;
4639 }
4640
4641 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4642                                          struct ieee80211_chanctx *ctx)
4643 {
4644         struct ieee80211_link_data *link;
4645         u8 radar_detect = 0;
4646
4647         lockdep_assert_held(&local->chanctx_mtx);
4648
4649         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4650                 return 0;
4651
4652         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4653                 if (link->reserved_radar_required)
4654                         radar_detect |= BIT(link->reserved_chandef.width);
4655
4656         /*
4657          * An in-place reservation context should not have any assigned vifs
4658          * until it replaces the other context.
4659          */
4660         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4661                 !list_empty(&ctx->assigned_links));
4662
4663         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4664                 if (!link->radar_required)
4665                         continue;
4666
4667                 radar_detect |=
4668                         BIT(link->conf->chandef.width);
4669         }
4670
4671         return radar_detect;
4672 }
4673
4674 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4675                                  const struct cfg80211_chan_def *chandef,
4676                                  enum ieee80211_chanctx_mode chanmode,
4677                                  u8 radar_detect)
4678 {
4679         struct ieee80211_local *local = sdata->local;
4680         struct ieee80211_sub_if_data *sdata_iter;
4681         enum nl80211_iftype iftype = sdata->wdev.iftype;
4682         struct ieee80211_chanctx *ctx;
4683         int total = 1;
4684         struct iface_combination_params params = {
4685                 .radar_detect = radar_detect,
4686         };
4687
4688         lockdep_assert_held(&local->chanctx_mtx);
4689
4690         if (WARN_ON(hweight32(radar_detect) > 1))
4691                 return -EINVAL;
4692
4693         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4694                     !chandef->chan))
4695                 return -EINVAL;
4696
4697         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4698                 return -EINVAL;
4699
4700         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4701             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4702                 /*
4703                  * always passing this is harmless, since it'll be the
4704                  * same value that cfg80211 finds if it finds the same
4705                  * interface ... and that's always allowed
4706                  */
4707                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4708         }
4709
4710         /* Always allow software iftypes */
4711         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4712                 if (radar_detect)
4713                         return -EINVAL;
4714                 return 0;
4715         }
4716
4717         if (chandef)
4718                 params.num_different_channels = 1;
4719
4720         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4721                 params.iftype_num[iftype] = 1;
4722
4723         list_for_each_entry(ctx, &local->chanctx_list, list) {
4724                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4725                         continue;
4726                 params.radar_detect |=
4727                         ieee80211_chanctx_radar_detect(local, ctx);
4728                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4729                         params.num_different_channels++;
4730                         continue;
4731                 }
4732                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4733                     cfg80211_chandef_compatible(chandef,
4734                                                 &ctx->conf.def))
4735                         continue;
4736                 params.num_different_channels++;
4737         }
4738
4739         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4740                 struct wireless_dev *wdev_iter;
4741
4742                 wdev_iter = &sdata_iter->wdev;
4743
4744                 if (sdata_iter == sdata ||
4745                     !ieee80211_sdata_running(sdata_iter) ||
4746                     cfg80211_iftype_allowed(local->hw.wiphy,
4747                                             wdev_iter->iftype, 0, 1))
4748                         continue;
4749
4750                 params.iftype_num[wdev_iter->iftype]++;
4751                 total++;
4752         }
4753
4754         if (total == 1 && !params.radar_detect)
4755                 return 0;
4756
4757         return cfg80211_check_combinations(local->hw.wiphy, &params);
4758 }
4759
4760 static void
4761 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4762                          void *data)
4763 {
4764         u32 *max_num_different_channels = data;
4765
4766         *max_num_different_channels = max(*max_num_different_channels,
4767                                           c->num_different_channels);
4768 }
4769
4770 int ieee80211_max_num_channels(struct ieee80211_local *local)
4771 {
4772         struct ieee80211_sub_if_data *sdata;
4773         struct ieee80211_chanctx *ctx;
4774         u32 max_num_different_channels = 1;
4775         int err;
4776         struct iface_combination_params params = {0};
4777
4778         lockdep_assert_held(&local->chanctx_mtx);
4779
4780         list_for_each_entry(ctx, &local->chanctx_list, list) {
4781                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4782                         continue;
4783
4784                 params.num_different_channels++;
4785
4786                 params.radar_detect |=
4787                         ieee80211_chanctx_radar_detect(local, ctx);
4788         }
4789
4790         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4791                 params.iftype_num[sdata->wdev.iftype]++;
4792
4793         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4794                                          ieee80211_iter_max_chans,
4795                                          &max_num_different_channels);
4796         if (err < 0)
4797                 return err;
4798
4799         return max_num_different_channels;
4800 }
4801
4802 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4803                                 struct ieee80211_sta_s1g_cap *caps,
4804                                 struct sk_buff *skb)
4805 {
4806         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4807         struct ieee80211_s1g_cap s1g_capab;
4808         u8 *pos;
4809         int i;
4810
4811         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4812                 return;
4813
4814         if (!caps->s1g)
4815                 return;
4816
4817         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4818         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4819
4820         /* override the capability info */
4821         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4822                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4823
4824                 s1g_capab.capab_info[i] &= ~mask;
4825                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4826         }
4827
4828         /* then MCS and NSS set */
4829         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4830                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4831
4832                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4833                 s1g_capab.supp_mcs_nss[i] |=
4834                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4835         }
4836
4837         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4838         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4839         *pos++ = sizeof(s1g_capab);
4840
4841         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4842 }
4843
4844 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4845                                   struct sk_buff *skb)
4846 {
4847         u8 *pos = skb_put(skb, 3);
4848
4849         *pos++ = WLAN_EID_AID_REQUEST;
4850         *pos++ = 1;
4851         *pos++ = 0;
4852 }
4853
4854 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4855 {
4856         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4857         *buf++ = 7; /* len */
4858         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4859         *buf++ = 0x50;
4860         *buf++ = 0xf2;
4861         *buf++ = 2; /* WME */
4862         *buf++ = 0; /* WME info */
4863         *buf++ = 1; /* WME ver */
4864         *buf++ = qosinfo; /* U-APSD no in use */
4865
4866         return buf;
4867 }
4868
4869 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4870                              unsigned long *frame_cnt,
4871                              unsigned long *byte_cnt)
4872 {
4873         struct txq_info *txqi = to_txq_info(txq);
4874         u32 frag_cnt = 0, frag_bytes = 0;
4875         struct sk_buff *skb;
4876
4877         skb_queue_walk(&txqi->frags, skb) {
4878                 frag_cnt++;
4879                 frag_bytes += skb->len;
4880         }
4881
4882         if (frame_cnt)
4883                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4884
4885         if (byte_cnt)
4886                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4887 }
4888 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4889
4890 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4891         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4892         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4893         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4894         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4895 };
4896
4897 u16 ieee80211_encode_usf(int listen_interval)
4898 {
4899         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4900         u16 ui, usf = 0;
4901
4902         /* find greatest USF */
4903         while (usf < IEEE80211_MAX_USF) {
4904                 if (listen_interval % listen_int_usf[usf + 1])
4905                         break;
4906                 usf += 1;
4907         }
4908         ui = listen_interval / listen_int_usf[usf];
4909
4910         /* error if there is a remainder. Should've been checked by user */
4911         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4912         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4913                           FIELD_PREP(LISTEN_INT_UI, ui);
4914
4915         return (u16) listen_interval;
4916 }
4917
4918 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4919 {
4920         const struct ieee80211_sta_he_cap *he_cap;
4921         const struct ieee80211_sta_eht_cap *eht_cap;
4922         struct ieee80211_supported_band *sband;
4923         bool is_ap;
4924         u8 n;
4925
4926         sband = ieee80211_get_sband(sdata);
4927         if (!sband)
4928                 return 0;
4929
4930         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4931         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4932         if (!he_cap || !eht_cap)
4933                 return 0;
4934
4935         is_ap = iftype == NL80211_IFTYPE_AP ||
4936                 iftype == NL80211_IFTYPE_P2P_GO;
4937
4938         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4939                                        &eht_cap->eht_cap_elem,
4940                                        is_ap);
4941         return 2 + 1 +
4942                sizeof(he_cap->he_cap_elem) + n +
4943                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4944                                       eht_cap->eht_cap_elem.phy_cap_info);
4945         return 0;
4946 }
4947
4948 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
4949                                const struct ieee80211_sta_he_cap *he_cap,
4950                                const struct ieee80211_sta_eht_cap *eht_cap,
4951                                u8 *end,
4952                                bool for_ap)
4953 {
4954         u8 mcs_nss_len, ppet_len;
4955         u8 ie_len;
4956         u8 *orig_pos = pos;
4957
4958         /* Make sure we have place for the IE */
4959         if (!he_cap || !eht_cap)
4960                 return orig_pos;
4961
4962         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4963                                                  &eht_cap->eht_cap_elem,
4964                                                  for_ap);
4965         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4966                                           eht_cap->eht_cap_elem.phy_cap_info);
4967
4968         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4969         if ((end - pos) < ie_len)
4970                 return orig_pos;
4971
4972         *pos++ = WLAN_EID_EXTENSION;
4973         *pos++ = ie_len - 2;
4974         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
4975
4976         /* Fixed data */
4977         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
4978         pos += sizeof(eht_cap->eht_cap_elem);
4979
4980         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4981         pos += mcs_nss_len;
4982
4983         if (ppet_len) {
4984                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
4985                 pos += ppet_len;
4986         }
4987
4988         return pos;
4989 }
4990
4991 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
4992 {
4993         unsigned int elem_len;
4994
4995         if (!len_pos)
4996                 return;
4997
4998         elem_len = skb->data + skb->len - len_pos - 1;
4999
5000         while (elem_len > 255) {
5001                 /* this one is 255 */
5002                 *len_pos = 255;
5003                 /* remaining data gets smaller */
5004                 elem_len -= 255;
5005                 /* make space for the fragment ID/len in SKB */
5006                 skb_put(skb, 2);
5007                 /* shift back the remaining data to place fragment ID/len */
5008                 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
5009                 /* place the fragment ID */
5010                 len_pos += 255 + 1;
5011                 *len_pos = WLAN_EID_FRAGMENT;
5012                 /* and point to fragment length to update later */
5013                 len_pos++;
5014         }
5015
5016         *len_pos = elem_len;
5017 }