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) 2018-2021 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->flags & IEEE80211_SDATA_OPERATING_GMODE)
 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->flags & IEEE80211_SDATA_OPERATING_GMODE)
 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->flags & IEEE80211_SDATA_OPERATING_GMODE)
 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 __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 292 {
 293         struct ieee80211_local *local = sdata->local;
 294         struct ieee80211_vif *vif = &sdata->vif;
 295         struct fq *fq = &local->fq;
 296         struct ps_data *ps = NULL;
 297         struct txq_info *txqi;
 298         struct sta_info *sta;
 299         int i;
 300
 301         local_bh_disable();
 302         spin_lock(&fq->lock);
 303
 304         if (sdata->vif.type == NL80211_IFTYPE_AP)
 305                 ps = &sdata->bss->ps;
 306
 307         sdata->vif.txqs_stopped[ac] = false;
 308
 309         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 310                 if (sdata != sta->sdata)
 311                         continue;
 312
 313                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 314                         struct ieee80211_txq *txq = sta->sta.txq[i];
 315
 316                         if (!txq)
 317                                 continue;
 318
 319                         txqi = to_txq_info(txq);
 320
 321                         if (ac != txq->ac)
 322                                 continue;
 323
 324                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 325                                                 &txqi->flags))
 326                                 continue;
 327
 328                         spin_unlock(&fq->lock);
 329                         drv_wake_tx_queue(local, txqi);
 330                         spin_lock(&fq->lock);
 331                 }
 332         }
 333
 334         if (!vif->txq)
 335                 goto out;
 336
 337         txqi = to_txq_info(vif->txq);
 338
 339         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 340             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 341                 goto out;
 342
 343         spin_unlock(&fq->lock);
 344
 345         drv_wake_tx_queue(local, txqi);
 346         local_bh_enable();
 347         return;
 348 out:
 349         spin_unlock(&fq->lock);
 350         local_bh_enable();
 351 }
 352
 353 static void
 354 __releases(&local->queue_stop_reason_lock)
 355 __acquires(&local->queue_stop_reason_lock)
 356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 357 {
 358         struct ieee80211_sub_if_data *sdata;
 359         int n_acs = IEEE80211_NUM_ACS;
 360         int i;
 361
 362         rcu_read_lock();
 363
 364         if (local->hw.queues < IEEE80211_NUM_ACS)
 365                 n_acs = 1;
 366
 367         for (i = 0; i < local->hw.queues; i++) {
 368                 if (local->queue_stop_reasons[i])
 369                         continue;
 370
 371                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 372                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 373                         int ac;
 374
 375                         for (ac = 0; ac < n_acs; ac++) {
 376                                 int ac_queue = sdata->vif.hw_queue[ac];
 377
 378                                 if (ac_queue == i ||
 379                                     sdata->vif.cab_queue == i)
 380                                         __ieee80211_wake_txqs(sdata, ac);
 381                         }
 382                 }
 383                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 384         }
 385
 386         rcu_read_unlock();
 387 }
 388
 389 void ieee80211_wake_txqs(struct tasklet_struct *t)
 390 {
 391         struct ieee80211_local *local = from_tasklet(local, t,
 392                                                      wake_txqs_tasklet);
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 396         _ieee80211_wake_txqs(local, &flags);
 397         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 398 }
 399
 400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 401 {
 402         struct ieee80211_sub_if_data *sdata;
 403         int n_acs = IEEE80211_NUM_ACS;
 404
 405         if (local->ops->wake_tx_queue)
 406                 return;
 407
 408         if (local->hw.queues < IEEE80211_NUM_ACS)
 409                 n_acs = 1;
 410
 411         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 412                 int ac;
 413
 414                 if (!sdata->dev)
 415                         continue;
 416
 417                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 418                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 419                         continue;
 420
 421                 for (ac = 0; ac < n_acs; ac++) {
 422                         int ac_queue = sdata->vif.hw_queue[ac];
 423
 424                         if (ac_queue == queue ||
 425                             (sdata->vif.cab_queue == queue &&
 426                              local->queue_stop_reasons[ac_queue] == 0 &&
 427                              skb_queue_empty(&local->pending[ac_queue])))
 428                                 netif_wake_subqueue(sdata->dev, ac);
 429                 }
 430         }
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         trace_wake_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 446                 return;
 447
 448         if (!refcounted) {
 449                 local->q_stop_reasons[queue][reason] = 0;
 450         } else {
 451                 local->q_stop_reasons[queue][reason]--;
 452                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 453                         local->q_stop_reasons[queue][reason] = 0;
 454         }
 455
 456         if (local->q_stop_reasons[queue][reason] == 0)
 457                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 458
 459         if (local->queue_stop_reasons[queue] != 0)
 460                 /* someone still has this queue stopped */
 461                 return;
 462
 463         if (skb_queue_empty(&local->pending[queue])) {
 464                 rcu_read_lock();
 465                 ieee80211_propagate_queue_wake(local, queue);
 466                 rcu_read_unlock();
 467         } else
 468                 tasklet_schedule(&local->tx_pending_tasklet);
 469
 470         /*
 471          * Calling _ieee80211_wake_txqs here can be a problem because it may
 472          * release queue_stop_reason_lock which has been taken by
 473          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 474          * release someone's lock, but it is fine because all the callers of
 475          * __ieee80211_wake_queue call it right before releasing the lock.
 476          */
 477         if (local->ops->wake_tx_queue) {
 478                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 479                         tasklet_schedule(&local->wake_txqs_tasklet);
 480                 else
 481                         _ieee80211_wake_txqs(local, flags);
 482         }
 483 }
 484
 485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 486                                     enum queue_stop_reason reason,
 487                                     bool refcounted)
 488 {
 489         struct ieee80211_local *local = hw_to_local(hw);
 490         unsigned long flags;
 491
 492         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 493         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 494         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 495 }
 496
 497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 498 {
 499         ieee80211_wake_queue_by_reason(hw, queue,
 500                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 501                                        false);
 502 }
 503 EXPORT_SYMBOL(ieee80211_wake_queue);
 504
 505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 506                                    enum queue_stop_reason reason,
 507                                    bool refcounted)
 508 {
 509         struct ieee80211_local *local = hw_to_local(hw);
 510         struct ieee80211_sub_if_data *sdata;
 511         int n_acs = IEEE80211_NUM_ACS;
 512
 513         trace_stop_queue(local, queue, reason);
 514
 515         if (WARN_ON(queue >= hw->queues))
 516                 return;
 517
 518         if (!refcounted)
 519                 local->q_stop_reasons[queue][reason] = 1;
 520         else
 521                 local->q_stop_reasons[queue][reason]++;
 522
 523         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 524                 return;
 525
 526         if (local->hw.queues < IEEE80211_NUM_ACS)
 527                 n_acs = 1;
 528
 529         rcu_read_lock();
 530         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 531                 int ac;
 532
 533                 if (!sdata->dev)
 534                         continue;
 535
 536                 for (ac = 0; ac < n_acs; ac++) {
 537                         if (sdata->vif.hw_queue[ac] == queue ||
 538                             sdata->vif.cab_queue == queue) {
 539                                 if (!local->ops->wake_tx_queue) {
 540                                         netif_stop_subqueue(sdata->dev, ac);
 541                                         continue;
 542                                 }
 543                                 spin_lock(&local->fq.lock);
 544                                 sdata->vif.txqs_stopped[ac] = true;
 545                                 spin_unlock(&local->fq.lock);
 546                         }
 547                 }
 548         }
 549         rcu_read_unlock();
 550 }
 551
 552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 553                                     enum queue_stop_reason reason,
 554                                     bool refcounted)
 555 {
 556         struct ieee80211_local *local = hw_to_local(hw);
 557         unsigned long flags;
 558
 559         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 560         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 561         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 562 }
 563
 564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 565 {
 566         ieee80211_stop_queue_by_reason(hw, queue,
 567                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 568                                        false);
 569 }
 570 EXPORT_SYMBOL(ieee80211_stop_queue);
 571
 572 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 573                                struct sk_buff *skb)
 574 {
 575         struct ieee80211_hw *hw = &local->hw;
 576         unsigned long flags;
 577         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 578         int queue = info->hw_queue;
 579
 580         if (WARN_ON(!info->control.vif)) {
 581                 ieee80211_free_txskb(&local->hw, skb);
 582                 return;
 583         }
 584
 585         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 586         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 587                                false);
 588         __skb_queue_tail(&local->pending[queue], skb);
 589         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 590                                false, &flags);
 591         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 592 }
 593
 594 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 595                                 struct sk_buff_head *skbs)
 596 {
 597         struct ieee80211_hw *hw = &local->hw;
 598         struct sk_buff *skb;
 599         unsigned long flags;
 600         int queue, i;
 601
 602         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 603         while ((skb = skb_dequeue(skbs))) {
 604                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 605
 606                 if (WARN_ON(!info->control.vif)) {
 607                         ieee80211_free_txskb(&local->hw, skb);
 608                         continue;
 609                 }
 610
 611                 queue = info->hw_queue;
 612
 613                 __ieee80211_stop_queue(hw, queue,
 614                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 615                                 false);
 616
 617                 __skb_queue_tail(&local->pending[queue], skb);
 618         }
 619
 620         for (i = 0; i < hw->queues; i++)
 621                 __ieee80211_wake_queue(hw, i,
 622                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 623                         false, &flags);
 624         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 625 }
 626
 627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 628                                      unsigned long queues,
 629                                      enum queue_stop_reason reason,
 630                                      bool refcounted)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633         unsigned long flags;
 634         int i;
 635
 636         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 637
 638         for_each_set_bit(i, &queues, hw->queues)
 639                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 640
 641         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 642 }
 643
 644 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 645 {
 646         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 647                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 648                                         false);
 649 }
 650 EXPORT_SYMBOL(ieee80211_stop_queues);
 651
 652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 653 {
 654         struct ieee80211_local *local = hw_to_local(hw);
 655         unsigned long flags;
 656         int ret;
 657
 658         if (WARN_ON(queue >= hw->queues))
 659                 return true;
 660
 661         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 662         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 663                        &local->queue_stop_reasons[queue]);
 664         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 665         return ret;
 666 }
 667 EXPORT_SYMBOL(ieee80211_queue_stopped);
 668
 669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 670                                      unsigned long queues,
 671                                      enum queue_stop_reason reason,
 672                                      bool refcounted)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675         unsigned long flags;
 676         int i;
 677
 678         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 679
 680         for_each_set_bit(i, &queues, hw->queues)
 681                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 682
 683         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 684 }
 685
 686 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 687 {
 688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 689                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 690                                         false);
 691 }
 692 EXPORT_SYMBOL(ieee80211_wake_queues);
 693
 694 static unsigned int
 695 ieee80211_get_vif_queues(struct ieee80211_local *local,
 696                          struct ieee80211_sub_if_data *sdata)
 697 {
 698         unsigned int queues;
 699
 700         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 701                 int ac;
 702
 703                 queues = 0;
 704
 705                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 706                         queues |= BIT(sdata->vif.hw_queue[ac]);
 707                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 708                         queues |= BIT(sdata->vif.cab_queue);
 709         } else {
 710                 /* all queues */
 711                 queues = BIT(local->hw.queues) - 1;
 712         }
 713
 714         return queues;
 715 }
 716
 717 void __ieee80211_flush_queues(struct ieee80211_local *local,
 718                               struct ieee80211_sub_if_data *sdata,
 719                               unsigned int queues, bool drop)
 720 {
 721         if (!local->ops->flush)
 722                 return;
 723
 724         /*
 725          * If no queue was set, or if the HW doesn't support
 726          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 727          */
 728         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 729                 queues = ieee80211_get_vif_queues(local, sdata);
 730
 731         ieee80211_stop_queues_by_reason(&local->hw, queues,
 732                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 733                                         false);
 734
 735         drv_flush(local, sdata, queues, drop);
 736
 737         ieee80211_wake_queues_by_reason(&local->hw, queues,
 738                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 739                                         false);
 740 }
 741
 742 void ieee80211_flush_queues(struct ieee80211_local *local,
 743                             struct ieee80211_sub_if_data *sdata, bool drop)
 744 {
 745         __ieee80211_flush_queues(local, sdata, 0, drop);
 746 }
 747
 748 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 749                                struct ieee80211_sub_if_data *sdata,
 750                                enum queue_stop_reason reason)
 751 {
 752         ieee80211_stop_queues_by_reason(&local->hw,
 753                                         ieee80211_get_vif_queues(local, sdata),
 754                                         reason, true);
 755 }
 756
 757 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 758                                struct ieee80211_sub_if_data *sdata,
 759                                enum queue_stop_reason reason)
 760 {
 761         ieee80211_wake_queues_by_reason(&local->hw,
 762                                         ieee80211_get_vif_queues(local, sdata),
 763                                         reason, true);
 764 }
 765
 766 static void __iterate_interfaces(struct ieee80211_local *local,
 767                                  u32 iter_flags,
 768                                  void (*iterator)(void *data, u8 *mac,
 769                                                   struct ieee80211_vif *vif),
 770                                  void *data)
 771 {
 772         struct ieee80211_sub_if_data *sdata;
 773         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 774
 775         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 776                 switch (sdata->vif.type) {
 777                 case NL80211_IFTYPE_MONITOR:
 778                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 779                                 continue;
 780                         break;
 781                 case NL80211_IFTYPE_AP_VLAN:
 782                         continue;
 783                 default:
 784                         break;
 785                 }
 786                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 787                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 788                         continue;
 789                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 790                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 791                         continue;
 792                 if (ieee80211_sdata_running(sdata) || !active_only)
 793                         iterator(data, sdata->vif.addr,
 794                                  &sdata->vif);
 795         }
 796
 797         sdata = rcu_dereference_check(local->monitor_sdata,
 798                                       lockdep_is_held(&local->iflist_mtx) ||
 799                                       lockdep_is_held(&local->hw.wiphy->mtx));
 800         if (sdata &&
 801             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 802              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 803                 iterator(data, sdata->vif.addr, &sdata->vif);
 804 }
 805
 806 void ieee80211_iterate_interfaces(
 807         struct ieee80211_hw *hw, u32 iter_flags,
 808         void (*iterator)(void *data, u8 *mac,
 809                          struct ieee80211_vif *vif),
 810         void *data)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813
 814         mutex_lock(&local->iflist_mtx);
 815         __iterate_interfaces(local, iter_flags, iterator, data);
 816         mutex_unlock(&local->iflist_mtx);
 817 }
 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 819
 820 void ieee80211_iterate_active_interfaces_atomic(
 821         struct ieee80211_hw *hw, u32 iter_flags,
 822         void (*iterator)(void *data, u8 *mac,
 823                          struct ieee80211_vif *vif),
 824         void *data)
 825 {
 826         struct ieee80211_local *local = hw_to_local(hw);
 827
 828         rcu_read_lock();
 829         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 830                              iterator, data);
 831         rcu_read_unlock();
 832 }
 833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 834
 835 void ieee80211_iterate_active_interfaces_mtx(
 836         struct ieee80211_hw *hw, u32 iter_flags,
 837         void (*iterator)(void *data, u8 *mac,
 838                          struct ieee80211_vif *vif),
 839         void *data)
 840 {
 841         struct ieee80211_local *local = hw_to_local(hw);
 842
 843         lockdep_assert_wiphy(hw->wiphy);
 844
 845         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 846                              iterator, data);
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 849
 850 static void __iterate_stations(struct ieee80211_local *local,
 851                                void (*iterator)(void *data,
 852                                                 struct ieee80211_sta *sta),
 853                                void *data)
 854 {
 855         struct sta_info *sta;
 856
 857         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 858                 if (!sta->uploaded)
 859                         continue;
 860
 861                 iterator(data, &sta->sta);
 862         }
 863 }
 864
 865 void ieee80211_iterate_stations(struct ieee80211_hw *hw,
 866                                 void (*iterator)(void *data,
 867                                                  struct ieee80211_sta *sta),
 868                                 void *data)
 869 {
 870         struct ieee80211_local *local = hw_to_local(hw);
 871
 872         mutex_lock(&local->sta_mtx);
 873         __iterate_stations(local, iterator, data);
 874         mutex_unlock(&local->sta_mtx);
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations);
 877
 878 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 879                         void (*iterator)(void *data,
 880                                          struct ieee80211_sta *sta),
 881                         void *data)
 882 {
 883         struct ieee80211_local *local = hw_to_local(hw);
 884
 885         rcu_read_lock();
 886         __iterate_stations(local, iterator, data);
 887         rcu_read_unlock();
 888 }
 889 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 890
 891 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 892 {
 893         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 894
 895         if (!ieee80211_sdata_running(sdata) ||
 896             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 897                 return NULL;
 898         return &sdata->vif;
 899 }
 900 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 901
 902 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 903 {
 904         if (!vif)
 905                 return NULL;
 906
 907         return &vif_to_sdata(vif)->wdev;
 908 }
 909 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 910
 911 /*
 912  * Nothing should have been stuffed into the workqueue during
 913  * the suspend->resume cycle. Since we can't check each caller
 914  * of this function if we are already quiescing / suspended,
 915  * check here and don't WARN since this can actually happen when
 916  * the rx path (for example) is racing against __ieee80211_suspend
 917  * and suspending / quiescing was set after the rx path checked
 918  * them.
 919  */
 920 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 921 {
 922         if (local->quiescing || (local->suspended && !local->resuming)) {
 923                 pr_warn("queueing ieee80211 work while going to suspend\n");
 924                 return false;
 925         }
 926
 927         return true;
 928 }
 929
 930 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_work(local->workqueue, work);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_work);
 940
 941 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 942                                   struct delayed_work *dwork,
 943                                   unsigned long delay)
 944 {
 945         struct ieee80211_local *local = hw_to_local(hw);
 946
 947         if (!ieee80211_can_queue_work(local))
 948                 return;
 949
 950         queue_delayed_work(local->workqueue, dwork, delay);
 951 }
 952 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 953
 954 static void ieee80211_parse_extension_element(u32 *crc,
 955                                               const struct element *elem,
 956                                               struct ieee802_11_elems *elems)
 957 {
 958         const void *data = elem->data + 1;
 959         u8 len;
 960
 961         if (!elem->datalen)
 962                 return;
 963
 964         len = elem->datalen - 1;
 965
 966         switch (elem->data[0]) {
 967         case WLAN_EID_EXT_HE_MU_EDCA:
 968                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 969                         elems->mu_edca_param_set = data;
 970                         if (crc)
 971                                 *crc = crc32_be(*crc, (void *)elem,
 972                                                 elem->datalen + 2);
 973                 }
 974                 break;
 975         case WLAN_EID_EXT_HE_CAPABILITY:
 976                 if (ieee80211_he_capa_size_ok(data, len)) {
 977                         elems->he_cap = data;
 978                         elems->he_cap_len = len;
 979                 }
 980                 break;
 981         case WLAN_EID_EXT_HE_OPERATION:
 982                 if (len >= sizeof(*elems->he_operation) &&
 983                     len >= ieee80211_he_oper_size(data) - 1) {
 984                         if (crc)
 985                                 *crc = crc32_be(*crc, (void *)elem,
 986                                                 elem->datalen + 2);
 987                         elems->he_operation = data;
 988                 }
 989                 break;
 990         case WLAN_EID_EXT_UORA:
 991                 if (len >= 1)
 992                         elems->uora_element = data;
 993                 break;
 994         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 995                 if (len == 3)
 996                         elems->max_channel_switch_time = data;
 997                 break;
 998         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 999                 if (len >= sizeof(*elems->mbssid_config_ie))
1000                         elems->mbssid_config_ie = data;
1001                 break;
1002         case WLAN_EID_EXT_HE_SPR:
1003                 if (len >= sizeof(*elems->he_spr) &&
1004                     len >= ieee80211_he_spr_size(data))
1005                         elems->he_spr = data;
1006                 break;
1007         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1008                 if (len >= sizeof(*elems->he_6ghz_capa))
1009                         elems->he_6ghz_capa = data;
1010                 break;
1011         case WLAN_EID_EXT_EHT_CAPABILITY:
1012                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
1013                                                data, len)) {
1014                         elems->eht_cap = data;
1015                         elems->eht_cap_len = len;
1016                 }
1017                 break;
1018         case WLAN_EID_EXT_EHT_OPERATION:
1019                 if (ieee80211_eht_oper_size_ok(data, len))
1020                         elems->eht_operation = data;
1021                 break;
1022         }
1023 }
1024
1025 static u32
1026 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1027                             struct ieee802_11_elems *elems,
1028                             u64 filter, u32 crc,
1029                             const struct element *check_inherit)
1030 {
1031         const struct element *elem;
1032         bool calc_crc = filter != 0;
1033         DECLARE_BITMAP(seen_elems, 256);
1034         const u8 *ie;
1035
1036         bitmap_zero(seen_elems, 256);
1037
1038         for_each_element(elem, start, len) {
1039                 bool elem_parse_failed;
1040                 u8 id = elem->id;
1041                 u8 elen = elem->datalen;
1042                 const u8 *pos = elem->data;
1043
1044                 if (check_inherit &&
1045                     !cfg80211_is_element_inherited(elem,
1046                                                    check_inherit))
1047                         continue;
1048
1049                 switch (id) {
1050                 case WLAN_EID_SSID:
1051                 case WLAN_EID_SUPP_RATES:
1052                 case WLAN_EID_FH_PARAMS:
1053                 case WLAN_EID_DS_PARAMS:
1054                 case WLAN_EID_CF_PARAMS:
1055                 case WLAN_EID_TIM:
1056                 case WLAN_EID_IBSS_PARAMS:
1057                 case WLAN_EID_CHALLENGE:
1058                 case WLAN_EID_RSN:
1059                 case WLAN_EID_ERP_INFO:
1060                 case WLAN_EID_EXT_SUPP_RATES:
1061                 case WLAN_EID_HT_CAPABILITY:
1062                 case WLAN_EID_HT_OPERATION:
1063                 case WLAN_EID_VHT_CAPABILITY:
1064                 case WLAN_EID_VHT_OPERATION:
1065                 case WLAN_EID_MESH_ID:
1066                 case WLAN_EID_MESH_CONFIG:
1067                 case WLAN_EID_PEER_MGMT:
1068                 case WLAN_EID_PREQ:
1069                 case WLAN_EID_PREP:
1070                 case WLAN_EID_PERR:
1071                 case WLAN_EID_RANN:
1072                 case WLAN_EID_CHANNEL_SWITCH:
1073                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1074                 case WLAN_EID_COUNTRY:
1075                 case WLAN_EID_PWR_CONSTRAINT:
1076                 case WLAN_EID_TIMEOUT_INTERVAL:
1077                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1078                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1079                 case WLAN_EID_CHAN_SWITCH_PARAM:
1080                 case WLAN_EID_EXT_CAPABILITY:
1081                 case WLAN_EID_CHAN_SWITCH_TIMING:
1082                 case WLAN_EID_LINK_ID:
1083                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1084                 case WLAN_EID_RSNX:
1085                 case WLAN_EID_S1G_BCN_COMPAT:
1086                 case WLAN_EID_S1G_CAPABILITIES:
1087                 case WLAN_EID_S1G_OPERATION:
1088                 case WLAN_EID_AID_RESPONSE:
1089                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1090                 /*
1091                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1092                  * that if the content gets bigger it might be needed more than once
1093                  */
1094                         if (test_bit(id, seen_elems)) {
1095                                 elems->parse_error = true;
1096                                 continue;
1097                         }
1098                         break;
1099                 }
1100
1101                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1102                         crc = crc32_be(crc, pos - 2, elen + 2);
1103
1104                 elem_parse_failed = false;
1105
1106                 switch (id) {
1107                 case WLAN_EID_LINK_ID:
1108                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1109                                 elem_parse_failed = true;
1110                                 break;
1111                         }
1112                         elems->lnk_id = (void *)(pos - 2);
1113                         break;
1114                 case WLAN_EID_CHAN_SWITCH_TIMING:
1115                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1116                                 elem_parse_failed = true;
1117                                 break;
1118                         }
1119                         elems->ch_sw_timing = (void *)pos;
1120                         break;
1121                 case WLAN_EID_EXT_CAPABILITY:
1122                         elems->ext_capab = pos;
1123                         elems->ext_capab_len = elen;
1124                         break;
1125                 case WLAN_EID_SSID:
1126                         elems->ssid = pos;
1127                         elems->ssid_len = elen;
1128                         break;
1129                 case WLAN_EID_SUPP_RATES:
1130                         elems->supp_rates = pos;
1131                         elems->supp_rates_len = elen;
1132                         break;
1133                 case WLAN_EID_DS_PARAMS:
1134                         if (elen >= 1)
1135                                 elems->ds_params = pos;
1136                         else
1137                                 elem_parse_failed = true;
1138                         break;
1139                 case WLAN_EID_TIM:
1140                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1141                                 elems->tim = (void *)pos;
1142                                 elems->tim_len = elen;
1143                         } else
1144                                 elem_parse_failed = true;
1145                         break;
1146                 case WLAN_EID_VENDOR_SPECIFIC:
1147                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1148                             pos[2] == 0xf2) {
1149                                 /* Microsoft OUI (00:50:F2) */
1150
1151                                 if (calc_crc)
1152                                         crc = crc32_be(crc, pos - 2, elen + 2);
1153
1154                                 if (elen >= 5 && pos[3] == 2) {
1155                                         /* OUI Type 2 - WMM IE */
1156                                         if (pos[4] == 0) {
1157                                                 elems->wmm_info = pos;
1158                                                 elems->wmm_info_len = elen;
1159                                         } else if (pos[4] == 1) {
1160                                                 elems->wmm_param = pos;
1161                                                 elems->wmm_param_len = elen;
1162                                         }
1163                                 }
1164                         }
1165                         break;
1166                 case WLAN_EID_RSN:
1167                         elems->rsn = pos;
1168                         elems->rsn_len = elen;
1169                         break;
1170                 case WLAN_EID_ERP_INFO:
1171                         if (elen >= 1)
1172                                 elems->erp_info = pos;
1173                         else
1174                                 elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_EXT_SUPP_RATES:
1177                         elems->ext_supp_rates = pos;
1178                         elems->ext_supp_rates_len = elen;
1179                         break;
1180                 case WLAN_EID_HT_CAPABILITY:
1181                         if (elen >= sizeof(struct ieee80211_ht_cap))
1182                                 elems->ht_cap_elem = (void *)pos;
1183                         else
1184                                 elem_parse_failed = true;
1185                         break;
1186                 case WLAN_EID_HT_OPERATION:
1187                         if (elen >= sizeof(struct ieee80211_ht_operation))
1188                                 elems->ht_operation = (void *)pos;
1189                         else
1190                                 elem_parse_failed = true;
1191                         break;
1192                 case WLAN_EID_VHT_CAPABILITY:
1193                         if (elen >= sizeof(struct ieee80211_vht_cap))
1194                                 elems->vht_cap_elem = (void *)pos;
1195                         else
1196                                 elem_parse_failed = true;
1197                         break;
1198                 case WLAN_EID_VHT_OPERATION:
1199                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1200                                 elems->vht_operation = (void *)pos;
1201                                 if (calc_crc)
1202                                         crc = crc32_be(crc, pos - 2, elen + 2);
1203                                 break;
1204                         }
1205                         elem_parse_failed = true;
1206                         break;
1207                 case WLAN_EID_OPMODE_NOTIF:
1208                         if (elen > 0) {
1209                                 elems->opmode_notif = pos;
1210                                 if (calc_crc)
1211                                         crc = crc32_be(crc, pos - 2, elen + 2);
1212                                 break;
1213                         }
1214                         elem_parse_failed = true;
1215                         break;
1216                 case WLAN_EID_MESH_ID:
1217                         elems->mesh_id = pos;
1218                         elems->mesh_id_len = elen;
1219                         break;
1220                 case WLAN_EID_MESH_CONFIG:
1221                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1222                                 elems->mesh_config = (void *)pos;
1223                         else
1224                                 elem_parse_failed = true;
1225                         break;
1226                 case WLAN_EID_PEER_MGMT:
1227                         elems->peering = pos;
1228                         elems->peering_len = elen;
1229                         break;
1230                 case WLAN_EID_MESH_AWAKE_WINDOW:
1231                         if (elen >= 2)
1232                                 elems->awake_window = (void *)pos;
1233                         break;
1234                 case WLAN_EID_PREQ:
1235                         elems->preq = pos;
1236                         elems->preq_len = elen;
1237                         break;
1238                 case WLAN_EID_PREP:
1239                         elems->prep = pos;
1240                         elems->prep_len = elen;
1241                         break;
1242                 case WLAN_EID_PERR:
1243                         elems->perr = pos;
1244                         elems->perr_len = elen;
1245                         break;
1246                 case WLAN_EID_RANN:
1247                         if (elen >= sizeof(struct ieee80211_rann_ie))
1248                                 elems->rann = (void *)pos;
1249                         else
1250                                 elem_parse_failed = true;
1251                         break;
1252                 case WLAN_EID_CHANNEL_SWITCH:
1253                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1254                                 elem_parse_failed = true;
1255                                 break;
1256                         }
1257                         elems->ch_switch_ie = (void *)pos;
1258                         break;
1259                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1260                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1261                                 elem_parse_failed = true;
1262                                 break;
1263                         }
1264                         elems->ext_chansw_ie = (void *)pos;
1265                         break;
1266                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1267                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1268                                 elem_parse_failed = true;
1269                                 break;
1270                         }
1271                         elems->sec_chan_offs = (void *)pos;
1272                         break;
1273                 case WLAN_EID_CHAN_SWITCH_PARAM:
1274                         if (elen <
1275                             sizeof(*elems->mesh_chansw_params_ie)) {
1276                                 elem_parse_failed = true;
1277                                 break;
1278                         }
1279                         elems->mesh_chansw_params_ie = (void *)pos;
1280                         break;
1281                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1282                         if (!action ||
1283                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1284                                 elem_parse_failed = true;
1285                                 break;
1286                         }
1287                         elems->wide_bw_chansw_ie = (void *)pos;
1288                         break;
1289                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1290                         if (action) {
1291                                 elem_parse_failed = true;
1292                                 break;
1293                         }
1294                         /*
1295                          * This is a bit tricky, but as we only care about
1296                          * the wide bandwidth channel switch element, so
1297                          * just parse it out manually.
1298                          */
1299                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1300                                               pos, elen);
1301                         if (ie) {
1302                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1303                                         elems->wide_bw_chansw_ie =
1304                                                 (void *)(ie + 2);
1305                                 else
1306                                         elem_parse_failed = true;
1307                         }
1308                         break;
1309                 case WLAN_EID_COUNTRY:
1310                         elems->country_elem = pos;
1311                         elems->country_elem_len = elen;
1312                         break;
1313                 case WLAN_EID_PWR_CONSTRAINT:
1314                         if (elen != 1) {
1315                                 elem_parse_failed = true;
1316                                 break;
1317                         }
1318                         elems->pwr_constr_elem = pos;
1319                         break;
1320                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1321                         /* Lots of different options exist, but we only care
1322                          * about the Dynamic Transmit Power Control element.
1323                          * First check for the Cisco OUI, then for the DTPC
1324                          * tag (0x00).
1325                          */
1326                         if (elen < 4) {
1327                                 elem_parse_failed = true;
1328                                 break;
1329                         }
1330
1331                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1332                             pos[2] != 0x96 || pos[3] != 0x00)
1333                                 break;
1334
1335                         if (elen != 6) {
1336                                 elem_parse_failed = true;
1337                                 break;
1338                         }
1339
1340                         if (calc_crc)
1341                                 crc = crc32_be(crc, pos - 2, elen + 2);
1342
1343                         elems->cisco_dtpc_elem = pos;
1344                         break;
1345                 case WLAN_EID_ADDBA_EXT:
1346                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1347                                 elem_parse_failed = true;
1348                                 break;
1349                         }
1350                         elems->addba_ext_ie = (void *)pos;
1351                         break;
1352                 case WLAN_EID_TIMEOUT_INTERVAL:
1353                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1354                                 elems->timeout_int = (void *)pos;
1355                         else
1356                                 elem_parse_failed = true;
1357                         break;
1358                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1359                         if (elen >= sizeof(*elems->max_idle_period_ie))
1360                                 elems->max_idle_period_ie = (void *)pos;
1361                         break;
1362                 case WLAN_EID_RSNX:
1363                         elems->rsnx = pos;
1364                         elems->rsnx_len = elen;
1365                         break;
1366                 case WLAN_EID_TX_POWER_ENVELOPE:
1367                         if (elen < 1 ||
1368                             elen > sizeof(struct ieee80211_tx_pwr_env))
1369                                 break;
1370
1371                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1372                                 break;
1373
1374                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1375                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1376                         elems->tx_pwr_env_num++;
1377                         break;
1378                 case WLAN_EID_EXTENSION:
1379                         ieee80211_parse_extension_element(calc_crc ?
1380                                                                 &crc : NULL,
1381                                                           elem, elems);
1382                         break;
1383                 case WLAN_EID_S1G_CAPABILITIES:
1384                         if (elen >= sizeof(*elems->s1g_capab))
1385                                 elems->s1g_capab = (void *)pos;
1386                         else
1387                                 elem_parse_failed = true;
1388                         break;
1389                 case WLAN_EID_S1G_OPERATION:
1390                         if (elen == sizeof(*elems->s1g_oper))
1391                                 elems->s1g_oper = (void *)pos;
1392                         else
1393                                 elem_parse_failed = true;
1394                         break;
1395                 case WLAN_EID_S1G_BCN_COMPAT:
1396                         if (elen == sizeof(*elems->s1g_bcn_compat))
1397                                 elems->s1g_bcn_compat = (void *)pos;
1398                         else
1399                                 elem_parse_failed = true;
1400                         break;
1401                 case WLAN_EID_AID_RESPONSE:
1402                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1403                                 elems->aid_resp = (void *)pos;
1404                         else
1405                                 elem_parse_failed = true;
1406                         break;
1407                 default:
1408                         break;
1409                 }
1410
1411                 if (elem_parse_failed)
1412                         elems->parse_error = true;
1413                 else
1414                         __set_bit(id, seen_elems);
1415         }
1416
1417         if (!for_each_element_completed(elem, start, len))
1418                 elems->parse_error = true;
1419
1420         return crc;
1421 }
1422
1423 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1424                                             struct ieee802_11_elems *elems,
1425                                             const u8 *transmitter_bssid,
1426                                             const u8 *bss_bssid,
1427                                             u8 *nontransmitted_profile)
1428 {
1429         const struct element *elem, *sub;
1430         size_t profile_len = 0;
1431         bool found = false;
1432
1433         if (!bss_bssid || !transmitter_bssid)
1434                 return profile_len;
1435
1436         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1437                 if (elem->datalen < 2)
1438                         continue;
1439
1440                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1441                         u8 new_bssid[ETH_ALEN];
1442                         const u8 *index;
1443
1444                         if (sub->id != 0 || sub->datalen < 4) {
1445                                 /* not a valid BSS profile */
1446                                 continue;
1447                         }
1448
1449                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1450                             sub->data[1] != 2) {
1451                                 /* The first element of the
1452                                  * Nontransmitted BSSID Profile is not
1453                                  * the Nontransmitted BSSID Capability
1454                                  * element.
1455                                  */
1456                                 continue;
1457                         }
1458
1459                         memset(nontransmitted_profile, 0, len);
1460                         profile_len = cfg80211_merge_profile(start, len,
1461                                                              elem,
1462                                                              sub,
1463                                                              nontransmitted_profile,
1464                                                              len);
1465
1466                         /* found a Nontransmitted BSSID Profile */
1467                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1468                                                  nontransmitted_profile,
1469                                                  profile_len);
1470                         if (!index || index[1] < 1 || index[2] == 0) {
1471                                 /* Invalid MBSSID Index element */
1472                                 continue;
1473                         }
1474
1475                         cfg80211_gen_new_bssid(transmitter_bssid,
1476                                                elem->data[0],
1477                                                index[2],
1478                                                new_bssid);
1479                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1480                                 found = true;
1481                                 elems->bssid_index_len = index[1];
1482                                 elems->bssid_index = (void *)&index[2];
1483                                 break;
1484                         }
1485                 }
1486         }
1487
1488         return found ? profile_len : 0;
1489 }
1490
1491 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
1492                                                     bool action, u64 filter,
1493                                                     u32 crc,
1494                                                     const u8 *transmitter_bssid,
1495                                                     const u8 *bss_bssid)
1496 {
1497         struct ieee802_11_elems *elems;
1498         const struct element *non_inherit = NULL;
1499         u8 *nontransmitted_profile;
1500         int nontransmitted_profile_len = 0;
1501
1502         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1503         if (!elems)
1504                 return NULL;
1505         elems->ie_start = start;
1506         elems->total_len = len;
1507
1508         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1509         if (nontransmitted_profile) {
1510                 nontransmitted_profile_len =
1511                         ieee802_11_find_bssid_profile(start, len, elems,
1512                                                       transmitter_bssid,
1513                                                       bss_bssid,
1514                                                       nontransmitted_profile);
1515                 non_inherit =
1516                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1517                                                nontransmitted_profile,
1518                                                nontransmitted_profile_len);
1519         }
1520
1521         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1522                                           crc, non_inherit);
1523
1524         /* Override with nontransmitted profile, if found */
1525         if (nontransmitted_profile_len)
1526                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1527                                             nontransmitted_profile_len,
1528                                             action, elems, 0, 0, NULL);
1529
1530         if (elems->tim && !elems->parse_error) {
1531                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1532
1533                 elems->dtim_period = tim_ie->dtim_period;
1534                 elems->dtim_count = tim_ie->dtim_count;
1535         }
1536
1537         /* Override DTIM period and count if needed */
1538         if (elems->bssid_index &&
1539             elems->bssid_index_len >=
1540             offsetofend(struct ieee80211_bssid_index, dtim_period))
1541                 elems->dtim_period = elems->bssid_index->dtim_period;
1542
1543         if (elems->bssid_index &&
1544             elems->bssid_index_len >=
1545             offsetofend(struct ieee80211_bssid_index, dtim_count))
1546                 elems->dtim_count = elems->bssid_index->dtim_count;
1547
1548         kfree(nontransmitted_profile);
1549
1550         elems->crc = crc;
1551
1552         return elems;
1553 }
1554
1555 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1556                                            struct ieee80211_tx_queue_params
1557                                            *qparam, int ac)
1558 {
1559         struct ieee80211_chanctx_conf *chanctx_conf;
1560         const struct ieee80211_reg_rule *rrule;
1561         const struct ieee80211_wmm_ac *wmm_ac;
1562         u16 center_freq = 0;
1563
1564         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1565             sdata->vif.type != NL80211_IFTYPE_STATION)
1566                 return;
1567
1568         rcu_read_lock();
1569         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1570         if (chanctx_conf)
1571                 center_freq = chanctx_conf->def.chan->center_freq;
1572
1573         if (!center_freq) {
1574                 rcu_read_unlock();
1575                 return;
1576         }
1577
1578         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1579
1580         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1581                 rcu_read_unlock();
1582                 return;
1583         }
1584
1585         if (sdata->vif.type == NL80211_IFTYPE_AP)
1586                 wmm_ac = &rrule->wmm_rule.ap[ac];
1587         else
1588                 wmm_ac = &rrule->wmm_rule.client[ac];
1589         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1590         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1591         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1592         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1593         rcu_read_unlock();
1594 }
1595
1596 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1597                                bool bss_notify, bool enable_qos)
1598 {
1599         struct ieee80211_local *local = sdata->local;
1600         struct ieee80211_tx_queue_params qparam;
1601         struct ieee80211_chanctx_conf *chanctx_conf;
1602         int ac;
1603         bool use_11b;
1604         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1605         int aCWmin, aCWmax;
1606
1607         if (!local->ops->conf_tx)
1608                 return;
1609
1610         if (local->hw.queues < IEEE80211_NUM_ACS)
1611                 return;
1612
1613         memset(&qparam, 0, sizeof(qparam));
1614
1615         rcu_read_lock();
1616         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1617         use_11b = (chanctx_conf &&
1618                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1619                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1620         rcu_read_unlock();
1621
1622         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1623
1624         /* Set defaults according to 802.11-2007 Table 7-37 */
1625         aCWmax = 1023;
1626         if (use_11b)
1627                 aCWmin = 31;
1628         else
1629                 aCWmin = 15;
1630
1631         /* Confiure old 802.11b/g medium access rules. */
1632         qparam.cw_max = aCWmax;
1633         qparam.cw_min = aCWmin;
1634         qparam.txop = 0;
1635         qparam.aifs = 2;
1636
1637         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1638                 /* Update if QoS is enabled. */
1639                 if (enable_qos) {
1640                         switch (ac) {
1641                         case IEEE80211_AC_BK:
1642                                 qparam.cw_max = aCWmax;
1643                                 qparam.cw_min = aCWmin;
1644                                 qparam.txop = 0;
1645                                 if (is_ocb)
1646                                         qparam.aifs = 9;
1647                                 else
1648                                         qparam.aifs = 7;
1649                                 break;
1650                         /* never happens but let's not leave undefined */
1651                         default:
1652                         case IEEE80211_AC_BE:
1653                                 qparam.cw_max = aCWmax;
1654                                 qparam.cw_min = aCWmin;
1655                                 qparam.txop = 0;
1656                                 if (is_ocb)
1657                                         qparam.aifs = 6;
1658                                 else
1659                                         qparam.aifs = 3;
1660                                 break;
1661                         case IEEE80211_AC_VI:
1662                                 qparam.cw_max = aCWmin;
1663                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1664                                 if (is_ocb)
1665                                         qparam.txop = 0;
1666                                 else if (use_11b)
1667                                         qparam.txop = 6016/32;
1668                                 else
1669                                         qparam.txop = 3008/32;
1670
1671                                 if (is_ocb)
1672                                         qparam.aifs = 3;
1673                                 else
1674                                         qparam.aifs = 2;
1675                                 break;
1676                         case IEEE80211_AC_VO:
1677                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1678                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1679                                 if (is_ocb)
1680                                         qparam.txop = 0;
1681                                 else if (use_11b)
1682                                         qparam.txop = 3264/32;
1683                                 else
1684                                         qparam.txop = 1504/32;
1685                                 qparam.aifs = 2;
1686                                 break;
1687                         }
1688                 }
1689                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1690
1691                 qparam.uapsd = false;
1692
1693                 sdata->tx_conf[ac] = qparam;
1694                 drv_conf_tx(local, sdata, ac, &qparam);
1695         }
1696
1697         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1698             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1699             sdata->vif.type != NL80211_IFTYPE_NAN) {
1700                 sdata->vif.bss_conf.qos = enable_qos;
1701                 if (bss_notify)
1702                         ieee80211_bss_info_change_notify(sdata,
1703                                                          BSS_CHANGED_QOS);
1704         }
1705 }
1706
1707 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1708                          u16 transaction, u16 auth_alg, u16 status,
1709                          const u8 *extra, size_t extra_len, const u8 *da,
1710                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1711                          u32 tx_flags)
1712 {
1713         struct ieee80211_local *local = sdata->local;
1714         struct sk_buff *skb;
1715         struct ieee80211_mgmt *mgmt;
1716         int err;
1717
1718         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1719         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1720                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1721         if (!skb)
1722                 return;
1723
1724         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1725
1726         mgmt = skb_put_zero(skb, 24 + 6);
1727         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1728                                           IEEE80211_STYPE_AUTH);
1729         memcpy(mgmt->da, da, ETH_ALEN);
1730         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1731         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1732         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1733         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1734         mgmt->u.auth.status_code = cpu_to_le16(status);
1735         if (extra)
1736                 skb_put_data(skb, extra, extra_len);
1737
1738         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1739                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1740                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1741                 if (WARN_ON(err)) {
1742                         kfree_skb(skb);
1743                         return;
1744                 }
1745         }
1746
1747         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1748                                         tx_flags;
1749         ieee80211_tx_skb(sdata, skb);
1750 }
1751
1752 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1753                                     const u8 *da, const u8 *bssid,
1754                                     u16 stype, u16 reason,
1755                                     bool send_frame, u8 *frame_buf)
1756 {
1757         struct ieee80211_local *local = sdata->local;
1758         struct sk_buff *skb;
1759         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1760
1761         /* build frame */
1762         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1763         mgmt->duration = 0; /* initialize only */
1764         mgmt->seq_ctrl = 0; /* initialize only */
1765         memcpy(mgmt->da, da, ETH_ALEN);
1766         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1767         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1768         /* u.deauth.reason_code == u.disassoc.reason_code */
1769         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1770
1771         if (send_frame) {
1772                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1773                                     IEEE80211_DEAUTH_FRAME_LEN);
1774                 if (!skb)
1775                         return;
1776
1777                 skb_reserve(skb, local->hw.extra_tx_headroom);
1778
1779                 /* copy in frame */
1780                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1781
1782                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1783                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1784                         IEEE80211_SKB_CB(skb)->flags |=
1785                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1786
1787                 ieee80211_tx_skb(sdata, skb);
1788         }
1789 }
1790
1791 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1792 {
1793         if ((end - pos) < 5)
1794                 return pos;
1795
1796         *pos++ = WLAN_EID_EXTENSION;
1797         *pos++ = 1 + sizeof(cap);
1798         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1799         memcpy(pos, &cap, sizeof(cap));
1800
1801         return pos + 2;
1802 }
1803
1804 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1805                                          u8 *buffer, size_t buffer_len,
1806                                          const u8 *ie, size_t ie_len,
1807                                          enum nl80211_band band,
1808                                          u32 rate_mask,
1809                                          struct cfg80211_chan_def *chandef,
1810                                          size_t *offset, u32 flags)
1811 {
1812         struct ieee80211_local *local = sdata->local;
1813         struct ieee80211_supported_band *sband;
1814         const struct ieee80211_sta_he_cap *he_cap;
1815         const struct ieee80211_sta_eht_cap *eht_cap;
1816         u8 *pos = buffer, *end = buffer + buffer_len;
1817         size_t noffset;
1818         int supp_rates_len, i;
1819         u8 rates[32];
1820         int num_rates;
1821         int ext_rates_len;
1822         int shift;
1823         u32 rate_flags;
1824         bool have_80mhz = false;
1825
1826         *offset = 0;
1827
1828         sband = local->hw.wiphy->bands[band];
1829         if (WARN_ON_ONCE(!sband))
1830                 return 0;
1831
1832         rate_flags = ieee80211_chandef_rate_flags(chandef);
1833         shift = ieee80211_chandef_get_shift(chandef);
1834
1835         num_rates = 0;
1836         for (i = 0; i < sband->n_bitrates; i++) {
1837                 if ((BIT(i) & rate_mask) == 0)
1838                         continue; /* skip rate */
1839                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1840                         continue;
1841
1842                 rates[num_rates++] =
1843                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1844                                           (1 << shift) * 5);
1845         }
1846
1847         supp_rates_len = min_t(int, num_rates, 8);
1848
1849         if (end - pos < 2 + supp_rates_len)
1850                 goto out_err;
1851         *pos++ = WLAN_EID_SUPP_RATES;
1852         *pos++ = supp_rates_len;
1853         memcpy(pos, rates, supp_rates_len);
1854         pos += supp_rates_len;
1855
1856         /* insert "request information" if in custom IEs */
1857         if (ie && ie_len) {
1858                 static const u8 before_extrates[] = {
1859                         WLAN_EID_SSID,
1860                         WLAN_EID_SUPP_RATES,
1861                         WLAN_EID_REQUEST,
1862                 };
1863                 noffset = ieee80211_ie_split(ie, ie_len,
1864                                              before_extrates,
1865                                              ARRAY_SIZE(before_extrates),
1866                                              *offset);
1867                 if (end - pos < noffset - *offset)
1868                         goto out_err;
1869                 memcpy(pos, ie + *offset, noffset - *offset);
1870                 pos += noffset - *offset;
1871                 *offset = noffset;
1872         }
1873
1874         ext_rates_len = num_rates - supp_rates_len;
1875         if (ext_rates_len > 0) {
1876                 if (end - pos < 2 + ext_rates_len)
1877                         goto out_err;
1878                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1879                 *pos++ = ext_rates_len;
1880                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1881                 pos += ext_rates_len;
1882         }
1883
1884         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1885                 if (end - pos < 3)
1886                         goto out_err;
1887                 *pos++ = WLAN_EID_DS_PARAMS;
1888                 *pos++ = 1;
1889                 *pos++ = ieee80211_frequency_to_channel(
1890                                 chandef->chan->center_freq);
1891         }
1892
1893         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1894                 goto done;
1895
1896         /* insert custom IEs that go before HT */
1897         if (ie && ie_len) {
1898                 static const u8 before_ht[] = {
1899                         /*
1900                          * no need to list the ones split off already
1901                          * (or generated here)
1902                          */
1903                         WLAN_EID_DS_PARAMS,
1904                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1905                 };
1906                 noffset = ieee80211_ie_split(ie, ie_len,
1907                                              before_ht, ARRAY_SIZE(before_ht),
1908                                              *offset);
1909                 if (end - pos < noffset - *offset)
1910                         goto out_err;
1911                 memcpy(pos, ie + *offset, noffset - *offset);
1912                 pos += noffset - *offset;
1913                 *offset = noffset;
1914         }
1915
1916         if (sband->ht_cap.ht_supported) {
1917                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1918                         goto out_err;
1919                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1920                                                 sband->ht_cap.cap);
1921         }
1922
1923         /* insert custom IEs that go before VHT */
1924         if (ie && ie_len) {
1925                 static const u8 before_vht[] = {
1926                         /*
1927                          * no need to list the ones split off already
1928                          * (or generated here)
1929                          */
1930                         WLAN_EID_BSS_COEX_2040,
1931                         WLAN_EID_EXT_CAPABILITY,
1932                         WLAN_EID_SSID_LIST,
1933                         WLAN_EID_CHANNEL_USAGE,
1934                         WLAN_EID_INTERWORKING,
1935                         WLAN_EID_MESH_ID,
1936                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1937                 };
1938                 noffset = ieee80211_ie_split(ie, ie_len,
1939                                              before_vht, ARRAY_SIZE(before_vht),
1940                                              *offset);
1941                 if (end - pos < noffset - *offset)
1942                         goto out_err;
1943                 memcpy(pos, ie + *offset, noffset - *offset);
1944                 pos += noffset - *offset;
1945                 *offset = noffset;
1946         }
1947
1948         /* Check if any channel in this sband supports at least 80 MHz */
1949         for (i = 0; i < sband->n_channels; i++) {
1950                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1951                                                 IEEE80211_CHAN_NO_80MHZ))
1952                         continue;
1953
1954                 have_80mhz = true;
1955                 break;
1956         }
1957
1958         if (sband->vht_cap.vht_supported && have_80mhz) {
1959                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1960                         goto out_err;
1961                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1962                                                  sband->vht_cap.cap);
1963         }
1964
1965         /* insert custom IEs that go before HE */
1966         if (ie && ie_len) {
1967                 static const u8 before_he[] = {
1968                         /*
1969                          * no need to list the ones split off before VHT
1970                          * or generated here
1971                          */
1972                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1973                         WLAN_EID_AP_CSN,
1974                         /* TODO: add 11ah/11aj/11ak elements */
1975                 };
1976                 noffset = ieee80211_ie_split(ie, ie_len,
1977                                              before_he, ARRAY_SIZE(before_he),
1978                                              *offset);
1979                 if (end - pos < noffset - *offset)
1980                         goto out_err;
1981                 memcpy(pos, ie + *offset, noffset - *offset);
1982                 pos += noffset - *offset;
1983                 *offset = noffset;
1984         }
1985
1986         he_cap = ieee80211_get_he_iftype_cap(sband,
1987                                              ieee80211_vif_type_p2p(&sdata->vif));
1988         if (he_cap &&
1989             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1990                                          IEEE80211_CHAN_NO_HE)) {
1991                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
1992                 if (!pos)
1993                         goto out_err;
1994         }
1995
1996         eht_cap = ieee80211_get_eht_iftype_cap(sband,
1997                                                ieee80211_vif_type_p2p(&sdata->vif));
1998
1999         if (eht_cap &&
2000             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2001                                          IEEE80211_CHAN_NO_HE |
2002                                          IEEE80211_CHAN_NO_EHT)) {
2003                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end);
2004                 if (!pos)
2005                         goto out_err;
2006         }
2007
2008         if (cfg80211_any_usable_channels(local->hw.wiphy,
2009                                          BIT(NL80211_BAND_6GHZ),
2010                                          IEEE80211_CHAN_NO_HE)) {
2011                 struct ieee80211_supported_band *sband6;
2012
2013                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2014                 he_cap = ieee80211_get_he_iftype_cap(sband6,
2015                                 ieee80211_vif_type_p2p(&sdata->vif));
2016
2017                 if (he_cap) {
2018                         enum nl80211_iftype iftype =
2019                                 ieee80211_vif_type_p2p(&sdata->vif);
2020                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
2021
2022                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2023                 }
2024         }
2025
2026         /*
2027          * If adding more here, adjust code in main.c
2028          * that calculates local->scan_ies_len.
2029          */
2030
2031         return pos - buffer;
2032  out_err:
2033         WARN_ONCE(1, "not enough space for preq IEs\n");
2034  done:
2035         return pos - buffer;
2036 }
2037
2038 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2039                              size_t buffer_len,
2040                              struct ieee80211_scan_ies *ie_desc,
2041                              const u8 *ie, size_t ie_len,
2042                              u8 bands_used, u32 *rate_masks,
2043                              struct cfg80211_chan_def *chandef,
2044                              u32 flags)
2045 {
2046         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2047         int i;
2048
2049         memset(ie_desc, 0, sizeof(*ie_desc));
2050
2051         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2052                 if (bands_used & BIT(i)) {
2053                         pos += ieee80211_build_preq_ies_band(sdata,
2054                                                              buffer + pos,
2055                                                              buffer_len - pos,
2056                                                              ie, ie_len, i,
2057                                                              rate_masks[i],
2058                                                              chandef,
2059                                                              &custom_ie_offset,
2060                                                              flags);
2061                         ie_desc->ies[i] = buffer + old_pos;
2062                         ie_desc->len[i] = pos - old_pos;
2063                         old_pos = pos;
2064                 }
2065         }
2066
2067         /* add any remaining custom IEs */
2068         if (ie && ie_len) {
2069                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2070                               "not enough space for preq custom IEs\n"))
2071                         return pos;
2072                 memcpy(buffer + pos, ie + custom_ie_offset,
2073                        ie_len - custom_ie_offset);
2074                 ie_desc->common_ies = buffer + pos;
2075                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2076                 pos += ie_len - custom_ie_offset;
2077         }
2078
2079         return pos;
2080 };
2081
2082 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2083                                           const u8 *src, const u8 *dst,
2084                                           u32 ratemask,
2085                                           struct ieee80211_channel *chan,
2086                                           const u8 *ssid, size_t ssid_len,
2087                                           const u8 *ie, size_t ie_len,
2088                                           u32 flags)
2089 {
2090         struct ieee80211_local *local = sdata->local;
2091         struct cfg80211_chan_def chandef;
2092         struct sk_buff *skb;
2093         struct ieee80211_mgmt *mgmt;
2094         int ies_len;
2095         u32 rate_masks[NUM_NL80211_BANDS] = {};
2096         struct ieee80211_scan_ies dummy_ie_desc;
2097
2098         /*
2099          * Do not send DS Channel parameter for directed probe requests
2100          * in order to maximize the chance that we get a response.  Some
2101          * badly-behaved APs don't respond when this parameter is included.
2102          */
2103         chandef.width = sdata->vif.bss_conf.chandef.width;
2104         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2105                 chandef.chan = NULL;
2106         else
2107                 chandef.chan = chan;
2108
2109         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2110                                      local->scan_ies_len + ie_len);
2111         if (!skb)
2112                 return NULL;
2113
2114         rate_masks[chan->band] = ratemask;
2115         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2116                                            skb_tailroom(skb), &dummy_ie_desc,
2117                                            ie, ie_len, BIT(chan->band),
2118                                            rate_masks, &chandef, flags);
2119         skb_put(skb, ies_len);
2120
2121         if (dst) {
2122                 mgmt = (struct ieee80211_mgmt *) skb->data;
2123                 memcpy(mgmt->da, dst, ETH_ALEN);
2124                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2125         }
2126
2127         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2128
2129         return skb;
2130 }
2131
2132 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2133                             struct ieee802_11_elems *elems,
2134                             enum nl80211_band band, u32 *basic_rates)
2135 {
2136         struct ieee80211_supported_band *sband;
2137         size_t num_rates;
2138         u32 supp_rates, rate_flags;
2139         int i, j, shift;
2140
2141         sband = sdata->local->hw.wiphy->bands[band];
2142         if (WARN_ON(!sband))
2143                 return 1;
2144
2145         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2146         shift = ieee80211_vif_get_shift(&sdata->vif);
2147
2148         num_rates = sband->n_bitrates;
2149         supp_rates = 0;
2150         for (i = 0; i < elems->supp_rates_len +
2151                      elems->ext_supp_rates_len; i++) {
2152                 u8 rate = 0;
2153                 int own_rate;
2154                 bool is_basic;
2155                 if (i < elems->supp_rates_len)
2156                         rate = elems->supp_rates[i];
2157                 else if (elems->ext_supp_rates)
2158                         rate = elems->ext_supp_rates
2159                                 [i - elems->supp_rates_len];
2160                 own_rate = 5 * (rate & 0x7f);
2161                 is_basic = !!(rate & 0x80);
2162
2163                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2164                         continue;
2165
2166                 for (j = 0; j < num_rates; j++) {
2167                         int brate;
2168                         if ((rate_flags & sband->bitrates[j].flags)
2169                             != rate_flags)
2170                                 continue;
2171
2172                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2173                                              1 << shift);
2174
2175                         if (brate == own_rate) {
2176                                 supp_rates |= BIT(j);
2177                                 if (basic_rates && is_basic)
2178                                         *basic_rates |= BIT(j);
2179                         }
2180                 }
2181         }
2182         return supp_rates;
2183 }
2184
2185 void ieee80211_stop_device(struct ieee80211_local *local)
2186 {
2187         ieee80211_led_radio(local, false);
2188         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2189
2190         cancel_work_sync(&local->reconfig_filter);
2191
2192         flush_workqueue(local->workqueue);
2193         drv_stop(local);
2194 }
2195
2196 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2197                                            bool aborted)
2198 {
2199         /* It's possible that we don't handle the scan completion in
2200          * time during suspend, so if it's still marked as completed
2201          * here, queue the work and flush it to clean things up.
2202          * Instead of calling the worker function directly here, we
2203          * really queue it to avoid potential races with other flows
2204          * scheduling the same work.
2205          */
2206         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2207                 /* If coming from reconfiguration failure, abort the scan so
2208                  * we don't attempt to continue a partial HW scan - which is
2209                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2210                  * completed scan, and a 5 GHz portion is still pending.
2211                  */
2212                 if (aborted)
2213                         set_bit(SCAN_ABORTED, &local->scanning);
2214                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2215                 flush_delayed_work(&local->scan_work);
2216         }
2217 }
2218
2219 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2220 {
2221         struct ieee80211_sub_if_data *sdata;
2222         struct ieee80211_chanctx *ctx;
2223
2224         /*
2225          * We get here if during resume the device can't be restarted properly.
2226          * We might also get here if this happens during HW reset, which is a
2227          * slightly different situation and we need to drop all connections in
2228          * the latter case.
2229          *
2230          * Ask cfg80211 to turn off all interfaces, this will result in more
2231          * warnings but at least we'll then get into a clean stopped state.
2232          */
2233
2234         local->resuming = false;
2235         local->suspended = false;
2236         local->in_reconfig = false;
2237
2238         ieee80211_flush_completed_scan(local, true);
2239
2240         /* scheduled scan clearly can't be running any more, but tell
2241          * cfg80211 and clear local state
2242          */
2243         ieee80211_sched_scan_end(local);
2244
2245         list_for_each_entry(sdata, &local->interfaces, list)
2246                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2247
2248         /* Mark channel contexts as not being in the driver any more to avoid
2249          * removing them from the driver during the shutdown process...
2250          */
2251         mutex_lock(&local->chanctx_mtx);
2252         list_for_each_entry(ctx, &local->chanctx_list, list)
2253                 ctx->driver_present = false;
2254         mutex_unlock(&local->chanctx_mtx);
2255 }
2256
2257 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2258                                      struct ieee80211_sub_if_data *sdata)
2259 {
2260         struct ieee80211_chanctx_conf *conf;
2261         struct ieee80211_chanctx *ctx;
2262
2263         if (!local->use_chanctx)
2264                 return;
2265
2266         mutex_lock(&local->chanctx_mtx);
2267         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2268                                          lockdep_is_held(&local->chanctx_mtx));
2269         if (conf) {
2270                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2271                 drv_assign_vif_chanctx(local, sdata, ctx);
2272         }
2273         mutex_unlock(&local->chanctx_mtx);
2274 }
2275
2276 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2277 {
2278         struct ieee80211_local *local = sdata->local;
2279         struct sta_info *sta;
2280
2281         /* add STAs back */
2282         mutex_lock(&local->sta_mtx);
2283         list_for_each_entry(sta, &local->sta_list, list) {
2284                 enum ieee80211_sta_state state;
2285
2286                 if (!sta->uploaded || sta->sdata != sdata)
2287                         continue;
2288
2289                 for (state = IEEE80211_STA_NOTEXIST;
2290                      state < sta->sta_state; state++)
2291                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2292                                               state + 1));
2293         }
2294         mutex_unlock(&local->sta_mtx);
2295 }
2296
2297 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2298 {
2299         struct cfg80211_nan_func *func, **funcs;
2300         int res, id, i = 0;
2301
2302         res = drv_start_nan(sdata->local, sdata,
2303                             &sdata->u.nan.conf);
2304         if (WARN_ON(res))
2305                 return res;
2306
2307         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2308                         sizeof(*funcs),
2309                         GFP_KERNEL);
2310         if (!funcs)
2311                 return -ENOMEM;
2312
2313         /* Add all the functions:
2314          * This is a little bit ugly. We need to call a potentially sleeping
2315          * callback for each NAN function, so we can't hold the spinlock.
2316          */
2317         spin_lock_bh(&sdata->u.nan.func_lock);
2318
2319         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2320                 funcs[i++] = func;
2321
2322         spin_unlock_bh(&sdata->u.nan.func_lock);
2323
2324         for (i = 0; funcs[i]; i++) {
2325                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2326                 if (WARN_ON(res))
2327                         ieee80211_nan_func_terminated(&sdata->vif,
2328                                                       funcs[i]->instance_id,
2329                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2330                                                       GFP_KERNEL);
2331         }
2332
2333         kfree(funcs);
2334
2335         return 0;
2336 }
2337
2338 int ieee80211_reconfig(struct ieee80211_local *local)
2339 {
2340         struct ieee80211_hw *hw = &local->hw;
2341         struct ieee80211_sub_if_data *sdata;
2342         struct ieee80211_chanctx *ctx;
2343         struct sta_info *sta;
2344         int res, i;
2345         bool reconfig_due_to_wowlan = false;
2346         struct ieee80211_sub_if_data *sched_scan_sdata;
2347         struct cfg80211_sched_scan_request *sched_scan_req;
2348         bool sched_scan_stopped = false;
2349         bool suspended = local->suspended;
2350         bool in_reconfig = false;
2351
2352         /* nothing to do if HW shouldn't run */
2353         if (!local->open_count)
2354                 goto wake_up;
2355
2356 #ifdef CONFIG_PM
2357         if (suspended)
2358                 local->resuming = true;
2359
2360         if (local->wowlan) {
2361                 /*
2362                  * In the wowlan case, both mac80211 and the device
2363                  * are functional when the resume op is called, so
2364                  * clear local->suspended so the device could operate
2365                  * normally (e.g. pass rx frames).
2366                  */
2367                 local->suspended = false;
2368                 res = drv_resume(local);
2369                 local->wowlan = false;
2370                 if (res < 0) {
2371                         local->resuming = false;
2372                         return res;
2373                 }
2374                 if (res == 0)
2375                         goto wake_up;
2376                 WARN_ON(res > 1);
2377                 /*
2378                  * res is 1, which means the driver requested
2379                  * to go through a regular reset on wakeup.
2380                  * restore local->suspended in this case.
2381                  */
2382                 reconfig_due_to_wowlan = true;
2383                 local->suspended = true;
2384         }
2385 #endif
2386
2387         /*
2388          * In case of hw_restart during suspend (without wowlan),
2389          * cancel restart work, as we are reconfiguring the device
2390          * anyway.
2391          * Note that restart_work is scheduled on a frozen workqueue,
2392          * so we can't deadlock in this case.
2393          */
2394         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2395                 cancel_work_sync(&local->restart_work);
2396
2397         local->started = false;
2398
2399         /*
2400          * Upon resume hardware can sometimes be goofy due to
2401          * various platform / driver / bus issues, so restarting
2402          * the device may at times not work immediately. Propagate
2403          * the error.
2404          */
2405         res = drv_start(local);
2406         if (res) {
2407                 if (suspended)
2408                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2409                 else
2410                         WARN(1, "Hardware became unavailable during restart.\n");
2411                 ieee80211_handle_reconfig_failure(local);
2412                 return res;
2413         }
2414
2415         /* setup fragmentation threshold */
2416         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2417
2418         /* setup RTS threshold */
2419         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2420
2421         /* reset coverage class */
2422         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2423
2424         ieee80211_led_radio(local, true);
2425         ieee80211_mod_tpt_led_trig(local,
2426                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2427
2428         /* add interfaces */
2429         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2430         if (sdata) {
2431                 /* in HW restart it exists already */
2432                 WARN_ON(local->resuming);
2433                 res = drv_add_interface(local, sdata);
2434                 if (WARN_ON(res)) {
2435                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2436                         synchronize_net();
2437                         kfree(sdata);
2438                 }
2439         }
2440
2441         list_for_each_entry(sdata, &local->interfaces, list) {
2442                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2443                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2444                     ieee80211_sdata_running(sdata)) {
2445                         res = drv_add_interface(local, sdata);
2446                         if (WARN_ON(res))
2447                                 break;
2448                 }
2449         }
2450
2451         /* If adding any of the interfaces failed above, roll back and
2452          * report failure.
2453          */
2454         if (res) {
2455                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2456                                                      list)
2457                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2458                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2459                             ieee80211_sdata_running(sdata))
2460                                 drv_remove_interface(local, sdata);
2461                 ieee80211_handle_reconfig_failure(local);
2462                 return res;
2463         }
2464
2465         /* add channel contexts */
2466         if (local->use_chanctx) {
2467                 mutex_lock(&local->chanctx_mtx);
2468                 list_for_each_entry(ctx, &local->chanctx_list, list)
2469                         if (ctx->replace_state !=
2470                             IEEE80211_CHANCTX_REPLACES_OTHER)
2471                                 WARN_ON(drv_add_chanctx(local, ctx));
2472                 mutex_unlock(&local->chanctx_mtx);
2473
2474                 sdata = wiphy_dereference(local->hw.wiphy,
2475                                           local->monitor_sdata);
2476                 if (sdata && ieee80211_sdata_running(sdata))
2477                         ieee80211_assign_chanctx(local, sdata);
2478         }
2479
2480         /* reconfigure hardware */
2481         ieee80211_hw_config(local, ~0);
2482
2483         ieee80211_configure_filter(local);
2484
2485         /* Finally also reconfigure all the BSS information */
2486         list_for_each_entry(sdata, &local->interfaces, list) {
2487                 u32 changed;
2488
2489                 if (!ieee80211_sdata_running(sdata))
2490                         continue;
2491
2492                 ieee80211_assign_chanctx(local, sdata);
2493
2494                 switch (sdata->vif.type) {
2495                 case NL80211_IFTYPE_AP_VLAN:
2496                 case NL80211_IFTYPE_MONITOR:
2497                         break;
2498                 case NL80211_IFTYPE_ADHOC:
2499                         if (sdata->vif.bss_conf.ibss_joined)
2500                                 WARN_ON(drv_join_ibss(local, sdata));
2501                         fallthrough;
2502                 default:
2503                         ieee80211_reconfig_stations(sdata);
2504                         fallthrough;
2505                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2506                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2507                                 drv_conf_tx(local, sdata, i,
2508                                             &sdata->tx_conf[i]);
2509                         break;
2510                 }
2511
2512                 /* common change flags for all interface types */
2513                 changed = BSS_CHANGED_ERP_CTS_PROT |
2514                           BSS_CHANGED_ERP_PREAMBLE |
2515                           BSS_CHANGED_ERP_SLOT |
2516                           BSS_CHANGED_HT |
2517                           BSS_CHANGED_BASIC_RATES |
2518                           BSS_CHANGED_BEACON_INT |
2519                           BSS_CHANGED_BSSID |
2520                           BSS_CHANGED_CQM |
2521                           BSS_CHANGED_QOS |
2522                           BSS_CHANGED_IDLE |
2523                           BSS_CHANGED_TXPOWER |
2524                           BSS_CHANGED_MCAST_RATE;
2525
2526                 if (sdata->vif.mu_mimo_owner)
2527                         changed |= BSS_CHANGED_MU_GROUPS;
2528
2529                 switch (sdata->vif.type) {
2530                 case NL80211_IFTYPE_STATION:
2531                         changed |= BSS_CHANGED_ASSOC |
2532                                    BSS_CHANGED_ARP_FILTER |
2533                                    BSS_CHANGED_PS;
2534
2535                         /* Re-send beacon info report to the driver */
2536                         if (sdata->u.mgd.have_beacon)
2537                                 changed |= BSS_CHANGED_BEACON_INFO;
2538
2539                         if (sdata->vif.bss_conf.max_idle_period ||
2540                             sdata->vif.bss_conf.protected_keep_alive)
2541                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2542
2543                         sdata_lock(sdata);
2544                         ieee80211_bss_info_change_notify(sdata, changed);
2545                         sdata_unlock(sdata);
2546                         break;
2547                 case NL80211_IFTYPE_OCB:
2548                         changed |= BSS_CHANGED_OCB;
2549                         ieee80211_bss_info_change_notify(sdata, changed);
2550                         break;
2551                 case NL80211_IFTYPE_ADHOC:
2552                         changed |= BSS_CHANGED_IBSS;
2553                         fallthrough;
2554                 case NL80211_IFTYPE_AP:
2555                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2556
2557                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2558                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2559                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2560                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2561
2562                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2563                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2564
2565                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2566                                         drv_start_ap(local, sdata);
2567                         }
2568                         fallthrough;
2569                 case NL80211_IFTYPE_MESH_POINT:
2570                         if (sdata->vif.bss_conf.enable_beacon) {
2571                                 changed |= BSS_CHANGED_BEACON |
2572                                            BSS_CHANGED_BEACON_ENABLED;
2573                                 ieee80211_bss_info_change_notify(sdata, changed);
2574                         }
2575                         break;
2576                 case NL80211_IFTYPE_NAN:
2577                         res = ieee80211_reconfig_nan(sdata);
2578                         if (res < 0) {
2579                                 ieee80211_handle_reconfig_failure(local);
2580                                 return res;
2581                         }
2582                         break;
2583                 case NL80211_IFTYPE_AP_VLAN:
2584                 case NL80211_IFTYPE_MONITOR:
2585                 case NL80211_IFTYPE_P2P_DEVICE:
2586                         /* nothing to do */
2587                         break;
2588                 case NL80211_IFTYPE_UNSPECIFIED:
2589                 case NUM_NL80211_IFTYPES:
2590                 case NL80211_IFTYPE_P2P_CLIENT:
2591                 case NL80211_IFTYPE_P2P_GO:
2592                 case NL80211_IFTYPE_WDS:
2593                         WARN_ON(1);
2594                         break;
2595                 }
2596         }
2597
2598         ieee80211_recalc_ps(local);
2599
2600         /*
2601          * The sta might be in psm against the ap (e.g. because
2602          * this was the state before a hw restart), so we
2603          * explicitly send a null packet in order to make sure
2604          * it'll sync against the ap (and get out of psm).
2605          */
2606         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2607                 list_for_each_entry(sdata, &local->interfaces, list) {
2608                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2609                                 continue;
2610                         if (!sdata->u.mgd.associated)
2611                                 continue;
2612
2613                         ieee80211_send_nullfunc(local, sdata, false);
2614                 }
2615         }
2616
2617         /* APs are now beaconing, add back stations */
2618         mutex_lock(&local->sta_mtx);
2619         list_for_each_entry(sta, &local->sta_list, list) {
2620                 enum ieee80211_sta_state state;
2621
2622                 if (!sta->uploaded)
2623                         continue;
2624
2625                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2626                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2627                         continue;
2628
2629                 for (state = IEEE80211_STA_NOTEXIST;
2630                      state < sta->sta_state; state++)
2631                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2632                                               state + 1));
2633         }
2634         mutex_unlock(&local->sta_mtx);
2635
2636         /* add back keys */
2637         list_for_each_entry(sdata, &local->interfaces, list)
2638                 ieee80211_reenable_keys(sdata);
2639
2640         /* Reconfigure sched scan if it was interrupted by FW restart */
2641         mutex_lock(&local->mtx);
2642         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2643                                                 lockdep_is_held(&local->mtx));
2644         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2645                                                 lockdep_is_held(&local->mtx));
2646         if (sched_scan_sdata && sched_scan_req)
2647                 /*
2648                  * Sched scan stopped, but we don't want to report it. Instead,
2649                  * we're trying to reschedule. However, if more than one scan
2650                  * plan was set, we cannot reschedule since we don't know which
2651                  * scan plan was currently running (and some scan plans may have
2652                  * already finished).
2653                  */
2654                 if (sched_scan_req->n_scan_plans > 1 ||
2655                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2656                                                          sched_scan_req)) {
2657                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2658                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2659                         sched_scan_stopped = true;
2660                 }
2661         mutex_unlock(&local->mtx);
2662
2663         if (sched_scan_stopped)
2664                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2665
2666  wake_up:
2667
2668         if (local->monitors == local->open_count && local->monitors > 0)
2669                 ieee80211_add_virtual_monitor(local);
2670
2671         /*
2672          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2673          * sessions can be established after a resume.
2674          *
2675          * Also tear down aggregation sessions since reconfiguring
2676          * them in a hardware restart scenario is not easily done
2677          * right now, and the hardware will have lost information
2678          * about the sessions, but we and the AP still think they
2679          * are active. This is really a workaround though.
2680          */
2681         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2682                 mutex_lock(&local->sta_mtx);
2683
2684                 list_for_each_entry(sta, &local->sta_list, list) {
2685                         if (!local->resuming)
2686                                 ieee80211_sta_tear_down_BA_sessions(
2687                                                 sta, AGG_STOP_LOCAL_REQUEST);
2688                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2689                 }
2690
2691                 mutex_unlock(&local->sta_mtx);
2692         }
2693
2694         /*
2695          * If this is for hw restart things are still running.
2696          * We may want to change that later, however.
2697          */
2698         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2699                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2700
2701         if (local->in_reconfig) {
2702                 in_reconfig = local->in_reconfig;
2703                 local->in_reconfig = false;
2704                 barrier();
2705
2706                 /* Restart deferred ROCs */
2707                 mutex_lock(&local->mtx);
2708                 ieee80211_start_next_roc(local);
2709                 mutex_unlock(&local->mtx);
2710
2711                 /* Requeue all works */
2712                 list_for_each_entry(sdata, &local->interfaces, list)
2713                         ieee80211_queue_work(&local->hw, &sdata->work);
2714         }
2715
2716         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2717                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2718                                         false);
2719
2720         if (in_reconfig) {
2721                 list_for_each_entry(sdata, &local->interfaces, list) {
2722                         if (!ieee80211_sdata_running(sdata))
2723                                 continue;
2724                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2725                                 ieee80211_sta_restart(sdata);
2726                 }
2727         }
2728
2729         if (!suspended)
2730                 return 0;
2731
2732 #ifdef CONFIG_PM
2733         /* first set suspended false, then resuming */
2734         local->suspended = false;
2735         mb();
2736         local->resuming = false;
2737
2738         ieee80211_flush_completed_scan(local, false);
2739
2740         if (local->open_count && !reconfig_due_to_wowlan)
2741                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2742
2743         list_for_each_entry(sdata, &local->interfaces, list) {
2744                 if (!ieee80211_sdata_running(sdata))
2745                         continue;
2746                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2747                         ieee80211_sta_restart(sdata);
2748         }
2749
2750         mod_timer(&local->sta_cleanup, jiffies + 1);
2751 #else
2752         WARN_ON(1);
2753 #endif
2754
2755         return 0;
2756 }
2757
2758 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2759 {
2760         struct ieee80211_sub_if_data *sdata;
2761         struct ieee80211_local *local;
2762         struct ieee80211_key *key;
2763
2764         if (WARN_ON(!vif))
2765                 return;
2766
2767         sdata = vif_to_sdata(vif);
2768         local = sdata->local;
2769
2770         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2771                     !local->resuming))
2772                 return;
2773
2774         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2775                     !local->in_reconfig))
2776                 return;
2777
2778         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2779                 return;
2780
2781         sdata->flags |= flag;
2782
2783         mutex_lock(&local->key_mtx);
2784         list_for_each_entry(key, &sdata->key_list, list)
2785                 key->flags |= KEY_FLAG_TAINTED;
2786         mutex_unlock(&local->key_mtx);
2787 }
2788
2789 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2790 {
2791         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2792 }
2793 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2794
2795 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2796 {
2797         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2798 }
2799 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2800
2801 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2802 {
2803         struct ieee80211_local *local = sdata->local;
2804         struct ieee80211_chanctx_conf *chanctx_conf;
2805         struct ieee80211_chanctx *chanctx;
2806
2807         mutex_lock(&local->chanctx_mtx);
2808
2809         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2810                                         lockdep_is_held(&local->chanctx_mtx));
2811
2812         /*
2813          * This function can be called from a work, thus it may be possible
2814          * that the chanctx_conf is removed (due to a disconnection, for
2815          * example).
2816          * So nothing should be done in such case.
2817          */
2818         if (!chanctx_conf)
2819                 goto unlock;
2820
2821         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2822         ieee80211_recalc_smps_chanctx(local, chanctx);
2823  unlock:
2824         mutex_unlock(&local->chanctx_mtx);
2825 }
2826
2827 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2828 {
2829         struct ieee80211_local *local = sdata->local;
2830         struct ieee80211_chanctx_conf *chanctx_conf;
2831         struct ieee80211_chanctx *chanctx;
2832
2833         mutex_lock(&local->chanctx_mtx);
2834
2835         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2836                                         lockdep_is_held(&local->chanctx_mtx));
2837
2838         if (WARN_ON_ONCE(!chanctx_conf))
2839                 goto unlock;
2840
2841         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2842         ieee80211_recalc_chanctx_min_def(local, chanctx);
2843  unlock:
2844         mutex_unlock(&local->chanctx_mtx);
2845 }
2846
2847 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2848 {
2849         size_t pos = offset;
2850
2851         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2852                 pos += 2 + ies[pos + 1];
2853
2854         return pos;
2855 }
2856
2857 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2858                                             int rssi_min_thold,
2859                                             int rssi_max_thold)
2860 {
2861         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2862
2863         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2864                 return;
2865
2866         /*
2867          * Scale up threshold values before storing it, as the RSSI averaging
2868          * algorithm uses a scaled up value as well. Change this scaling
2869          * factor if the RSSI averaging algorithm changes.
2870          */
2871         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2872         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2873 }
2874
2875 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2876                                     int rssi_min_thold,
2877                                     int rssi_max_thold)
2878 {
2879         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2880
2881         WARN_ON(rssi_min_thold == rssi_max_thold ||
2882                 rssi_min_thold > rssi_max_thold);
2883
2884         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2885                                        rssi_max_thold);
2886 }
2887 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2888
2889 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2890 {
2891         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2892
2893         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2894 }
2895 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2896
2897 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2898                               u16 cap)
2899 {
2900         __le16 tmp;
2901
2902         *pos++ = WLAN_EID_HT_CAPABILITY;
2903         *pos++ = sizeof(struct ieee80211_ht_cap);
2904         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2905
2906         /* capability flags */
2907         tmp = cpu_to_le16(cap);
2908         memcpy(pos, &tmp, sizeof(u16));
2909         pos += sizeof(u16);
2910
2911         /* AMPDU parameters */
2912         *pos++ = ht_cap->ampdu_factor |
2913                  (ht_cap->ampdu_density <<
2914                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2915
2916         /* MCS set */
2917         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2918         pos += sizeof(ht_cap->mcs);
2919
2920         /* extended capabilities */
2921         pos += sizeof(__le16);
2922
2923         /* BF capabilities */
2924         pos += sizeof(__le32);
2925
2926         /* antenna selection */
2927         pos += sizeof(u8);
2928
2929         return pos;
2930 }
2931
2932 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2933                                u32 cap)
2934 {
2935         __le32 tmp;
2936
2937         *pos++ = WLAN_EID_VHT_CAPABILITY;
2938         *pos++ = sizeof(struct ieee80211_vht_cap);
2939         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2940
2941         /* capability flags */
2942         tmp = cpu_to_le32(cap);
2943         memcpy(pos, &tmp, sizeof(u32));
2944         pos += sizeof(u32);
2945
2946         /* VHT MCS set */
2947         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2948         pos += sizeof(vht_cap->vht_mcs);
2949
2950         return pos;
2951 }
2952
2953 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2954 {
2955         const struct ieee80211_sta_he_cap *he_cap;
2956         struct ieee80211_supported_band *sband;
2957         u8 n;
2958
2959         sband = ieee80211_get_sband(sdata);
2960         if (!sband)
2961                 return 0;
2962
2963         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2964         if (!he_cap)
2965                 return 0;
2966
2967         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2968         return 2 + 1 +
2969                sizeof(he_cap->he_cap_elem) + n +
2970                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2971                                      he_cap->he_cap_elem.phy_cap_info);
2972 }
2973
2974 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2975                               const struct ieee80211_sta_he_cap *he_cap,
2976                               u8 *end)
2977 {
2978         struct ieee80211_he_cap_elem elem;
2979         u8 n;
2980         u8 ie_len;
2981         u8 *orig_pos = pos;
2982
2983         /* Make sure we have place for the IE */
2984         /*
2985          * TODO: the 1 added is because this temporarily is under the EXTENSION
2986          * IE. Get rid of it when it moves.
2987          */
2988         if (!he_cap)
2989                 return orig_pos;
2990
2991         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2992         elem = he_cap->he_cap_elem;
2993
2994         if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
2995                 elem.phy_cap_info[0] &=
2996                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2997                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2998
2999         if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
3000                 elem.phy_cap_info[0] &=
3001                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3002
3003         if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
3004                 elem.phy_cap_info[0] &=
3005                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3006
3007         n = ieee80211_he_mcs_nss_size(&elem);
3008         ie_len = 2 + 1 +
3009                  sizeof(he_cap->he_cap_elem) + n +
3010                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3011                                        he_cap->he_cap_elem.phy_cap_info);
3012
3013         if ((end - pos) < ie_len)
3014                 return orig_pos;
3015
3016         *pos++ = WLAN_EID_EXTENSION;
3017         pos++; /* We'll set the size later below */
3018         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3019
3020         /* Fixed data */
3021         memcpy(pos, &elem, sizeof(elem));
3022         pos += sizeof(elem);
3023
3024         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3025         pos += n;
3026
3027         /* Check if PPE Threshold should be present */
3028         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3029              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3030                 goto end;
3031
3032         /*
3033          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3034          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3035          */
3036         n = hweight8(he_cap->ppe_thres[0] &
3037                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3038         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3039                    IEEE80211_PPE_THRES_NSS_POS));
3040
3041         /*
3042          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3043          * total size.
3044          */
3045         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3046         n = DIV_ROUND_UP(n, 8);
3047
3048         /* Copy PPE Thresholds */
3049         memcpy(pos, &he_cap->ppe_thres, n);
3050         pos += n;
3051
3052 end:
3053         orig_pos[1] = (pos - orig_pos) - 2;
3054         return pos;
3055 }
3056
3057 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3058                                     struct sk_buff *skb)
3059 {
3060         struct ieee80211_supported_band *sband;
3061         const struct ieee80211_sband_iftype_data *iftd;
3062         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3063         u8 *pos;
3064         u16 cap;
3065
3066         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3067                                           BIT(NL80211_BAND_6GHZ),
3068                                           IEEE80211_CHAN_NO_HE))
3069                 return;
3070
3071         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3072
3073         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3074         if (!iftd)
3075                 return;
3076
3077         /* Check for device HE 6 GHz capability before adding element */
3078         if (!iftd->he_6ghz_capa.capa)
3079                 return;
3080
3081         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3082         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3083
3084         switch (sdata->smps_mode) {
3085         case IEEE80211_SMPS_AUTOMATIC:
3086         case IEEE80211_SMPS_NUM_MODES:
3087                 WARN_ON(1);
3088                 fallthrough;
3089         case IEEE80211_SMPS_OFF:
3090                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3091                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3092                 break;
3093         case IEEE80211_SMPS_STATIC:
3094                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3095                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3096                 break;
3097         case IEEE80211_SMPS_DYNAMIC:
3098                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3099                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3100                 break;
3101         }
3102
3103         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3104         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3105                                     pos + 2 + 1 + sizeof(cap));
3106 }
3107
3108 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3109                                const struct cfg80211_chan_def *chandef,
3110                                u16 prot_mode, bool rifs_mode)
3111 {
3112         struct ieee80211_ht_operation *ht_oper;
3113         /* Build HT Information */
3114         *pos++ = WLAN_EID_HT_OPERATION;
3115         *pos++ = sizeof(struct ieee80211_ht_operation);
3116         ht_oper = (struct ieee80211_ht_operation *)pos;
3117         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3118                                         chandef->chan->center_freq);
3119         switch (chandef->width) {
3120         case NL80211_CHAN_WIDTH_160:
3121         case NL80211_CHAN_WIDTH_80P80:
3122         case NL80211_CHAN_WIDTH_80:
3123         case NL80211_CHAN_WIDTH_40:
3124                 if (chandef->center_freq1 > chandef->chan->center_freq)
3125                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3126                 else
3127                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3128                 break;
3129         case NL80211_CHAN_WIDTH_320:
3130                 /* HT information element should not be included on 6GHz */
3131                 WARN_ON(1);
3132                 return pos;
3133         default:
3134                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3135                 break;
3136         }
3137         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3138             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3139             chandef->width != NL80211_CHAN_WIDTH_20)
3140                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3141
3142         if (rifs_mode)
3143                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3144
3145         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3146         ht_oper->stbc_param = 0x0000;
3147
3148         /* It seems that Basic MCS set and Supported MCS set
3149            are identical for the first 10 bytes */
3150         memset(&ht_oper->basic_set, 0, 16);
3151         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3152
3153         return pos + sizeof(struct ieee80211_ht_operation);
3154 }
3155
3156 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3157                                    const struct cfg80211_chan_def *chandef)
3158 {
3159         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3160         *pos++ = 3;                                     /* IE length */
3161         /* New channel width */
3162         switch (chandef->width) {
3163         case NL80211_CHAN_WIDTH_80:
3164                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3165                 break;
3166         case NL80211_CHAN_WIDTH_160:
3167                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3168                 break;
3169         case NL80211_CHAN_WIDTH_80P80:
3170                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3171                 break;
3172         case NL80211_CHAN_WIDTH_320:
3173                 /* The behavior is not defined for 320 MHz channels */
3174                 WARN_ON(1);
3175                 fallthrough;
3176         default:
3177                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3178         }
3179
3180         /* new center frequency segment 0 */
3181         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3182         /* new center frequency segment 1 */
3183         if (chandef->center_freq2)
3184                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3185         else
3186                 *pos++ = 0;
3187 }
3188
3189 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3190                                 const struct cfg80211_chan_def *chandef)
3191 {
3192         struct ieee80211_vht_operation *vht_oper;
3193
3194         *pos++ = WLAN_EID_VHT_OPERATION;
3195         *pos++ = sizeof(struct ieee80211_vht_operation);
3196         vht_oper = (struct ieee80211_vht_operation *)pos;
3197         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3198                                                         chandef->center_freq1);
3199         if (chandef->center_freq2)
3200                 vht_oper->center_freq_seg1_idx =
3201                         ieee80211_frequency_to_channel(chandef->center_freq2);
3202         else
3203                 vht_oper->center_freq_seg1_idx = 0x00;
3204
3205         switch (chandef->width) {
3206         case NL80211_CHAN_WIDTH_160:
3207                 /*
3208                  * Convert 160 MHz channel width to new style as interop
3209                  * workaround.
3210                  */
3211                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3212                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3213                 if (chandef->chan->center_freq < chandef->center_freq1)
3214                         vht_oper->center_freq_seg0_idx -= 8;
3215                 else
3216                         vht_oper->center_freq_seg0_idx += 8;
3217                 break;
3218         case NL80211_CHAN_WIDTH_80P80:
3219                 /*
3220                  * Convert 80+80 MHz channel width to new style as interop
3221                  * workaround.
3222                  */
3223                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3224                 break;
3225         case NL80211_CHAN_WIDTH_80:
3226                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3227                 break;
3228         case NL80211_CHAN_WIDTH_320:
3229                 /* VHT information element should not be included on 6GHz */
3230                 WARN_ON(1);
3231                 return pos;
3232         default:
3233                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3234                 break;
3235         }
3236
3237         /* don't require special VHT peer rates */
3238         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3239
3240         return pos + sizeof(struct ieee80211_vht_operation);
3241 }
3242
3243 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3244 {
3245         struct ieee80211_he_operation *he_oper;
3246         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3247         u32 he_oper_params;
3248         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3249
3250         if (chandef->chan->band == NL80211_BAND_6GHZ)
3251                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3252
3253         *pos++ = WLAN_EID_EXTENSION;
3254         *pos++ = ie_len;
3255         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3256
3257         he_oper_params = 0;
3258         he_oper_params |= u32_encode_bits(1023, /* disabled */
3259                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3260         he_oper_params |= u32_encode_bits(1,
3261                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3262         he_oper_params |= u32_encode_bits(1,
3263                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3264         if (chandef->chan->band == NL80211_BAND_6GHZ)
3265                 he_oper_params |= u32_encode_bits(1,
3266                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3267
3268         he_oper = (struct ieee80211_he_operation *)pos;
3269         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3270
3271         /* don't require special HE peer rates */
3272         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3273         pos += sizeof(struct ieee80211_he_operation);
3274
3275         if (chandef->chan->band != NL80211_BAND_6GHZ)
3276                 goto out;
3277
3278         /* TODO add VHT operational */
3279         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3280         he_6ghz_op->minrate = 6; /* 6 Mbps */
3281         he_6ghz_op->primary =
3282                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3283         he_6ghz_op->ccfs0 =
3284                 ieee80211_frequency_to_channel(chandef->center_freq1);
3285         if (chandef->center_freq2)
3286                 he_6ghz_op->ccfs1 =
3287                         ieee80211_frequency_to_channel(chandef->center_freq2);
3288         else
3289                 he_6ghz_op->ccfs1 = 0;
3290
3291         switch (chandef->width) {
3292         case NL80211_CHAN_WIDTH_320:
3293                 /*
3294                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3295                  * channels.
3296                  */
3297                 WARN_ON(1);
3298                 break;
3299         case NL80211_CHAN_WIDTH_160:
3300                 /* Convert 160 MHz channel width to new style as interop
3301                  * workaround.
3302                  */
3303                 he_6ghz_op->control =
3304                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3305                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3306                 if (chandef->chan->center_freq < chandef->center_freq1)
3307                         he_6ghz_op->ccfs0 -= 8;
3308                 else
3309                         he_6ghz_op->ccfs0 += 8;
3310                 fallthrough;
3311         case NL80211_CHAN_WIDTH_80P80:
3312                 he_6ghz_op->control =
3313                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3314                 break;
3315         case NL80211_CHAN_WIDTH_80:
3316                 he_6ghz_op->control =
3317                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3318                 break;
3319         case NL80211_CHAN_WIDTH_40:
3320                 he_6ghz_op->control =
3321                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3322                 break;
3323         default:
3324                 he_6ghz_op->control =
3325                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3326                 break;
3327         }
3328
3329         pos += sizeof(struct ieee80211_he_6ghz_oper);
3330
3331 out:
3332         return pos;
3333 }
3334
3335 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3336                                struct cfg80211_chan_def *chandef)
3337 {
3338         enum nl80211_channel_type channel_type;
3339
3340         if (!ht_oper)
3341                 return false;
3342
3343         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3344         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3345                 channel_type = NL80211_CHAN_HT20;
3346                 break;
3347         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3348                 channel_type = NL80211_CHAN_HT40PLUS;
3349                 break;
3350         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3351                 channel_type = NL80211_CHAN_HT40MINUS;
3352                 break;
3353         default:
3354                 return false;
3355         }
3356
3357         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3358         return true;
3359 }
3360
3361 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3362                                 const struct ieee80211_vht_operation *oper,
3363                                 const struct ieee80211_ht_operation *htop,
3364                                 struct cfg80211_chan_def *chandef)
3365 {
3366         struct cfg80211_chan_def new = *chandef;
3367         int cf0, cf1;
3368         int ccfs0, ccfs1, ccfs2;
3369         int ccf0, ccf1;
3370         u32 vht_cap;
3371         bool support_80_80 = false;
3372         bool support_160 = false;
3373         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3374                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3375         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3376                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3377
3378         if (!oper || !htop)
3379                 return false;
3380
3381         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3382         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3383                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3384         support_80_80 = ((vht_cap &
3385                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3386                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3387                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3388                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3389                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3390         ccfs0 = oper->center_freq_seg0_idx;
3391         ccfs1 = oper->center_freq_seg1_idx;
3392         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3393                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3394                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3395
3396         ccf0 = ccfs0;
3397
3398         /* if not supported, parse as though we didn't understand it */
3399         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3400                 ext_nss_bw_supp = 0;
3401
3402         /*
3403          * Cf. IEEE 802.11 Table 9-250
3404          *
3405          * We really just consider that because it's inefficient to connect
3406          * at a higher bandwidth than we'll actually be able to use.
3407          */
3408         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3409         default:
3410         case 0x00:
3411                 ccf1 = 0;
3412                 support_160 = false;
3413                 support_80_80 = false;
3414                 break;
3415         case 0x01:
3416                 support_80_80 = false;
3417                 fallthrough;
3418         case 0x02:
3419         case 0x03:
3420                 ccf1 = ccfs2;
3421                 break;
3422         case 0x10:
3423                 ccf1 = ccfs1;
3424                 break;
3425         case 0x11:
3426         case 0x12:
3427                 if (!ccfs1)
3428                         ccf1 = ccfs2;
3429                 else
3430                         ccf1 = ccfs1;
3431                 break;
3432         case 0x13:
3433         case 0x20:
3434         case 0x23:
3435                 ccf1 = ccfs1;
3436                 break;
3437         }
3438
3439         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3440         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3441
3442         switch (oper->chan_width) {
3443         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3444                 /* just use HT information directly */
3445                 break;
3446         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3447                 new.width = NL80211_CHAN_WIDTH_80;
3448                 new.center_freq1 = cf0;
3449                 /* If needed, adjust based on the newer interop workaround. */
3450                 if (ccf1) {
3451                         unsigned int diff;
3452
3453                         diff = abs(ccf1 - ccf0);
3454                         if ((diff == 8) && support_160) {
3455                                 new.width = NL80211_CHAN_WIDTH_160;
3456                                 new.center_freq1 = cf1;
3457                         } else if ((diff > 8) && support_80_80) {
3458                                 new.width = NL80211_CHAN_WIDTH_80P80;
3459                                 new.center_freq2 = cf1;
3460                         }
3461                 }
3462                 break;
3463         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3464                 /* deprecated encoding */
3465                 new.width = NL80211_CHAN_WIDTH_160;
3466                 new.center_freq1 = cf0;
3467                 break;
3468         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3469                 /* deprecated encoding */
3470                 new.width = NL80211_CHAN_WIDTH_80P80;
3471                 new.center_freq1 = cf0;
3472                 new.center_freq2 = cf1;
3473                 break;
3474         default:
3475                 return false;
3476         }
3477
3478         if (!cfg80211_chandef_valid(&new))
3479                 return false;
3480
3481         *chandef = new;
3482         return true;
3483 }
3484
3485 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3486                                     const struct ieee80211_he_operation *he_oper,
3487                                     const struct ieee80211_eht_operation *eht_oper,
3488                                     struct cfg80211_chan_def *chandef)
3489 {
3490         struct ieee80211_local *local = sdata->local;
3491         struct ieee80211_supported_band *sband;
3492         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3493         const struct ieee80211_sta_he_cap *he_cap;
3494         const struct ieee80211_sta_eht_cap *eht_cap;
3495         struct cfg80211_chan_def he_chandef = *chandef;
3496         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3497         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3498         bool support_80_80, support_160, support_320;
3499         u8 he_phy_cap, eht_phy_cap;
3500         u32 freq;
3501
3502         if (chandef->chan->band != NL80211_BAND_6GHZ)
3503                 return true;
3504
3505         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3506
3507         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3508         if (!he_cap) {
3509                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3510                 return false;
3511         }
3512
3513         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3514         support_160 =
3515                 he_phy_cap &
3516                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3517         support_80_80 =
3518                 he_phy_cap &
3519                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3520
3521         if (!he_oper) {
3522                 sdata_info(sdata,
3523                            "HE is not advertised on (on %d MHz), expect issues\n",
3524                            chandef->chan->center_freq);
3525                 return false;
3526         }
3527
3528         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3529         if (!eht_cap) {
3530                 sdata_info(sdata, "Missing iftype sband data/EHT cap");
3531                 eht_oper = NULL;
3532         }
3533
3534         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3535
3536         if (!he_6ghz_oper) {
3537                 sdata_info(sdata,
3538                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3539                            chandef->chan->center_freq);
3540                 return false;
3541         }
3542
3543         /*
3544          * The EHT operation IE does not contain the primary channel so the
3545          * primary channel frequency should be taken from the 6 GHz operation
3546          * information.
3547          */
3548         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3549                                               NL80211_BAND_6GHZ);
3550         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3551
3552         switch (u8_get_bits(he_6ghz_oper->control,
3553                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3554         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3555                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3556                 break;
3557         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3558                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3559                 break;
3560         default:
3561                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3562                 break;
3563         }
3564
3565         if (!eht_oper) {
3566                 switch (u8_get_bits(he_6ghz_oper->control,
3567                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3568                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3569                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3570                         break;
3571                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3572                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3573                         break;
3574                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3575                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3576                         break;
3577                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3578                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3579                         if (!he_6ghz_oper->ccfs1)
3580                                 break;
3581                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3582                                 if (support_160)
3583                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3584                         } else {
3585                                 if (support_80_80)
3586                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3587                         }
3588                         break;
3589                 }
3590
3591                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3592                         he_chandef.center_freq1 =
3593                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3594                                                                NL80211_BAND_6GHZ);
3595                 } else {
3596                         he_chandef.center_freq1 =
3597                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3598                                                                NL80211_BAND_6GHZ);
3599                         if (support_80_80 || support_160)
3600                                 he_chandef.center_freq2 =
3601                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3602                                                                        NL80211_BAND_6GHZ);
3603                 }
3604         } else {
3605                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3606                 support_320 =
3607                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3608
3609                 switch (u8_get_bits(eht_oper->chan_width,
3610                                     IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3611                 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3612                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3613                         break;
3614                 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3615                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3616                         break;
3617                 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3618                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3619                         break;
3620                 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3621                         if (support_160)
3622                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3623                         else
3624                                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3625                         break;
3626                 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3627                         if (support_320)
3628                                 he_chandef.width = NL80211_CHAN_WIDTH_320;
3629                         else if (support_160)
3630                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3631                         else
3632                                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3633                         break;
3634                 }
3635
3636                 he_chandef.center_freq1 =
3637                         ieee80211_channel_to_frequency(eht_oper->ccfs,
3638                                                        NL80211_BAND_6GHZ);
3639         }
3640
3641         if (!cfg80211_chandef_valid(&he_chandef)) {
3642                 sdata_info(sdata,
3643                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3644                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3645                            he_chandef.width,
3646                            he_chandef.center_freq1,
3647                            he_chandef.center_freq2);
3648                 return false;
3649         }
3650
3651         *chandef = he_chandef;
3652
3653         return true;
3654 }
3655
3656 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3657                                 struct cfg80211_chan_def *chandef)
3658 {
3659         u32 oper_freq;
3660
3661         if (!oper)
3662                 return false;
3663
3664         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3665         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3666                 chandef->width = NL80211_CHAN_WIDTH_1;
3667                 break;
3668         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3669                 chandef->width = NL80211_CHAN_WIDTH_2;
3670                 break;
3671         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3672                 chandef->width = NL80211_CHAN_WIDTH_4;
3673                 break;
3674         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3675                 chandef->width = NL80211_CHAN_WIDTH_8;
3676                 break;
3677         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3678                 chandef->width = NL80211_CHAN_WIDTH_16;
3679                 break;
3680         default:
3681                 return false;
3682         }
3683
3684         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3685                                                   NL80211_BAND_S1GHZ);
3686         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3687         chandef->freq1_offset = oper_freq % 1000;
3688
3689         return true;
3690 }
3691
3692 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3693                              const struct ieee80211_supported_band *sband,
3694                              const u8 *srates, int srates_len, u32 *rates)
3695 {
3696         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3697         int shift = ieee80211_chandef_get_shift(chandef);
3698         struct ieee80211_rate *br;
3699         int brate, rate, i, j, count = 0;
3700
3701         *rates = 0;
3702
3703         for (i = 0; i < srates_len; i++) {
3704                 rate = srates[i] & 0x7f;
3705
3706                 for (j = 0; j < sband->n_bitrates; j++) {
3707                         br = &sband->bitrates[j];
3708                         if ((rate_flags & br->flags) != rate_flags)
3709                                 continue;
3710
3711                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3712                         if (brate == rate) {
3713                                 *rates |= BIT(j);
3714                                 count++;
3715                                 break;
3716                         }
3717                 }
3718         }
3719         return count;
3720 }
3721
3722 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3723                             struct sk_buff *skb, bool need_basic,
3724                             enum nl80211_band band)
3725 {
3726         struct ieee80211_local *local = sdata->local;
3727         struct ieee80211_supported_band *sband;
3728         int rate, shift;
3729         u8 i, rates, *pos;
3730         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3731         u32 rate_flags;
3732
3733         shift = ieee80211_vif_get_shift(&sdata->vif);
3734         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3735         sband = local->hw.wiphy->bands[band];
3736         rates = 0;
3737         for (i = 0; i < sband->n_bitrates; i++) {
3738                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3739                         continue;
3740                 rates++;
3741         }
3742         if (rates > 8)
3743                 rates = 8;
3744
3745         if (skb_tailroom(skb) < rates + 2)
3746                 return -ENOMEM;
3747
3748         pos = skb_put(skb, rates + 2);
3749         *pos++ = WLAN_EID_SUPP_RATES;
3750         *pos++ = rates;
3751         for (i = 0; i < rates; i++) {
3752                 u8 basic = 0;
3753                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3754                         continue;
3755
3756                 if (need_basic && basic_rates & BIT(i))
3757                         basic = 0x80;
3758                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3759                                     5 * (1 << shift));
3760                 *pos++ = basic | (u8) rate;
3761         }
3762
3763         return 0;
3764 }
3765
3766 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3767                                 struct sk_buff *skb, bool need_basic,
3768                                 enum nl80211_band band)
3769 {
3770         struct ieee80211_local *local = sdata->local;
3771         struct ieee80211_supported_band *sband;
3772         int rate, shift;
3773         u8 i, exrates, *pos;
3774         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3775         u32 rate_flags;
3776
3777         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3778         shift = ieee80211_vif_get_shift(&sdata->vif);
3779
3780         sband = local->hw.wiphy->bands[band];
3781         exrates = 0;
3782         for (i = 0; i < sband->n_bitrates; i++) {
3783                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3784                         continue;
3785                 exrates++;
3786         }
3787
3788         if (exrates > 8)
3789                 exrates -= 8;
3790         else
3791                 exrates = 0;
3792
3793         if (skb_tailroom(skb) < exrates + 2)
3794                 return -ENOMEM;
3795
3796         if (exrates) {
3797                 pos = skb_put(skb, exrates + 2);
3798                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3799                 *pos++ = exrates;
3800                 for (i = 8; i < sband->n_bitrates; i++) {
3801                         u8 basic = 0;
3802                         if ((rate_flags & sband->bitrates[i].flags)
3803                             != rate_flags)
3804                                 continue;
3805                         if (need_basic && basic_rates & BIT(i))
3806                                 basic = 0x80;
3807                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3808                                             5 * (1 << shift));
3809                         *pos++ = basic | (u8) rate;
3810                 }
3811         }
3812         return 0;
3813 }
3814
3815 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3816 {
3817         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3818         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3819
3820         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3821                 /* non-managed type inferfaces */
3822                 return 0;
3823         }
3824         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3825 }
3826 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3827
3828 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3829 {
3830         if (!mcs)
3831                 return 1;
3832
3833         /* TODO: consider rx_highest */
3834
3835         if (mcs->rx_mask[3])
3836                 return 4;
3837         if (mcs->rx_mask[2])
3838                 return 3;
3839         if (mcs->rx_mask[1])
3840                 return 2;
3841         return 1;
3842 }
3843
3844 /**
3845  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3846  * @local: mac80211 hw info struct
3847  * @status: RX status
3848  * @mpdu_len: total MPDU length (including FCS)
3849  * @mpdu_offset: offset into MPDU to calculate timestamp at
3850  *
3851  * This function calculates the RX timestamp at the given MPDU offset, taking
3852  * into account what the RX timestamp was. An offset of 0 will just normalize
3853  * the timestamp to TSF at beginning of MPDU reception.
3854  */
3855 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3856                                      struct ieee80211_rx_status *status,
3857                                      unsigned int mpdu_len,
3858                                      unsigned int mpdu_offset)
3859 {
3860         u64 ts = status->mactime;
3861         struct rate_info ri;
3862         u16 rate;
3863         u8 n_ltf;
3864
3865         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3866                 return 0;
3867
3868         memset(&ri, 0, sizeof(ri));
3869
3870         ri.bw = status->bw;
3871
3872         /* Fill cfg80211 rate info */
3873         switch (status->encoding) {
3874         case RX_ENC_HE:
3875                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3876                 ri.mcs = status->rate_idx;
3877                 ri.nss = status->nss;
3878                 ri.he_ru_alloc = status->he_ru;
3879                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3880                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3881
3882                 /*
3883                  * See P802.11ax_D6.0, section 27.3.4 for
3884                  * VHT PPDU format.
3885                  */
3886                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3887                         mpdu_offset += 2;
3888                         ts += 36;
3889
3890                         /*
3891                          * TODO:
3892                          * For HE MU PPDU, add the HE-SIG-B.
3893                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3894                          * For HE TB PPDU, add 4us for the HE-STF.
3895                          * Add the HE-LTF durations - variable.
3896                          */
3897                 }
3898
3899                 break;
3900         case RX_ENC_HT:
3901                 ri.mcs = status->rate_idx;
3902                 ri.flags |= RATE_INFO_FLAGS_MCS;
3903                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3904                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3905
3906                 /*
3907                  * See P802.11REVmd_D3.0, section 19.3.2 for
3908                  * HT PPDU format.
3909                  */
3910                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3911                         mpdu_offset += 2;
3912                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3913                                 ts += 24;
3914                         else
3915                                 ts += 32;
3916
3917                         /*
3918                          * Add Data HT-LTFs per streams
3919                          * TODO: add Extension HT-LTFs, 4us per LTF
3920                          */
3921                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3922                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3923                         ts += n_ltf * 4;
3924                 }
3925
3926                 break;
3927         case RX_ENC_VHT:
3928                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3929                 ri.mcs = status->rate_idx;
3930                 ri.nss = status->nss;
3931                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3932                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3933
3934                 /*
3935                  * See P802.11REVmd_D3.0, section 21.3.2 for
3936                  * VHT PPDU format.
3937                  */
3938                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3939                         mpdu_offset += 2;
3940                         ts += 36;
3941
3942                         /*
3943                          * Add VHT-LTFs per streams
3944                          */
3945                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3946                                 ri.nss + 1 : ri.nss;
3947                         ts += 4 * n_ltf;
3948                 }
3949
3950                 break;
3951         default:
3952                 WARN_ON(1);
3953                 fallthrough;
3954         case RX_ENC_LEGACY: {
3955                 struct ieee80211_supported_band *sband;
3956                 int shift = 0;
3957                 int bitrate;
3958
3959                 switch (status->bw) {
3960                 case RATE_INFO_BW_10:
3961                         shift = 1;
3962                         break;
3963                 case RATE_INFO_BW_5:
3964                         shift = 2;
3965                         break;
3966                 }
3967
3968                 sband = local->hw.wiphy->bands[status->band];
3969                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3970                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3971
3972                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3973                         if (status->band == NL80211_BAND_5GHZ) {
3974                                 ts += 20 << shift;
3975                                 mpdu_offset += 2;
3976                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3977                                 ts += 96;
3978                         } else {
3979                                 ts += 192;
3980                         }
3981                 }
3982                 break;
3983                 }
3984         }
3985
3986         rate = cfg80211_calculate_bitrate(&ri);
3987         if (WARN_ONCE(!rate,
3988                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3989                       (unsigned long long)status->flag, status->rate_idx,
3990                       status->nss))
3991                 return 0;
3992
3993         /* rewind from end of MPDU */
3994         if (status->flag & RX_FLAG_MACTIME_END)
3995                 ts -= mpdu_len * 8 * 10 / rate;
3996
3997         ts += mpdu_offset * 8 * 10 / rate;
3998
3999         return ts;
4000 }
4001
4002 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4003 {
4004         struct ieee80211_sub_if_data *sdata;
4005         struct cfg80211_chan_def chandef;
4006
4007         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4008         lockdep_assert_wiphy(local->hw.wiphy);
4009
4010         mutex_lock(&local->mtx);
4011         list_for_each_entry(sdata, &local->interfaces, list) {
4012                 /* it might be waiting for the local->mtx, but then
4013                  * by the time it gets it, sdata->wdev.cac_started
4014                  * will no longer be true
4015                  */
4016                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
4017
4018                 if (sdata->wdev.cac_started) {
4019                         chandef = sdata->vif.bss_conf.chandef;
4020                         ieee80211_vif_release_channel(sdata);
4021                         cfg80211_cac_event(sdata->dev,
4022                                            &chandef,
4023                                            NL80211_RADAR_CAC_ABORTED,
4024                                            GFP_KERNEL);
4025                 }
4026         }
4027         mutex_unlock(&local->mtx);
4028 }
4029
4030 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4031 {
4032         struct ieee80211_local *local =
4033                 container_of(work, struct ieee80211_local, radar_detected_work);
4034         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4035         struct ieee80211_chanctx *ctx;
4036         int num_chanctx = 0;
4037
4038         mutex_lock(&local->chanctx_mtx);
4039         list_for_each_entry(ctx, &local->chanctx_list, list) {
4040                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4041                         continue;
4042
4043                 num_chanctx++;
4044                 chandef = ctx->conf.def;
4045         }
4046         mutex_unlock(&local->chanctx_mtx);
4047
4048         wiphy_lock(local->hw.wiphy);
4049         ieee80211_dfs_cac_cancel(local);
4050         wiphy_unlock(local->hw.wiphy);
4051
4052         if (num_chanctx > 1)
4053                 /* XXX: multi-channel is not supported yet */
4054                 WARN_ON(1);
4055         else
4056                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4057 }
4058
4059 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4060 {
4061         struct ieee80211_local *local = hw_to_local(hw);
4062
4063         trace_api_radar_detected(local);
4064
4065         schedule_work(&local->radar_detected_work);
4066 }
4067 EXPORT_SYMBOL(ieee80211_radar_detected);
4068
4069 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4070 {
4071         u32 ret;
4072         int tmp;
4073
4074         switch (c->width) {
4075         case NL80211_CHAN_WIDTH_20:
4076                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4077                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
4078                 break;
4079         case NL80211_CHAN_WIDTH_40:
4080                 c->width = NL80211_CHAN_WIDTH_20;
4081                 c->center_freq1 = c->chan->center_freq;
4082                 ret = IEEE80211_STA_DISABLE_40MHZ |
4083                       IEEE80211_STA_DISABLE_VHT;
4084                 break;
4085         case NL80211_CHAN_WIDTH_80:
4086                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4087                 /* n_P40 */
4088                 tmp /= 2;
4089                 /* freq_P40 */
4090                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4091                 c->width = NL80211_CHAN_WIDTH_40;
4092                 ret = IEEE80211_STA_DISABLE_VHT;
4093                 break;
4094         case NL80211_CHAN_WIDTH_80P80:
4095                 c->center_freq2 = 0;
4096                 c->width = NL80211_CHAN_WIDTH_80;
4097                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
4098                       IEEE80211_STA_DISABLE_160MHZ;
4099                 break;
4100         case NL80211_CHAN_WIDTH_160:
4101                 /* n_P20 */
4102                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4103                 /* n_P80 */
4104                 tmp /= 4;
4105                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4106                 c->width = NL80211_CHAN_WIDTH_80;
4107                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
4108                       IEEE80211_STA_DISABLE_160MHZ;
4109                 break;
4110         case NL80211_CHAN_WIDTH_320:
4111                 /* n_P20 */
4112                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4113                 /* n_P160 */
4114                 tmp /= 80;
4115                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4116                 c->width = NL80211_CHAN_WIDTH_160;
4117                 ret = IEEE80211_STA_DISABLE_320MHZ;
4118                 break;
4119         default:
4120         case NL80211_CHAN_WIDTH_20_NOHT:
4121                 WARN_ON_ONCE(1);
4122                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4123                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
4124                 break;
4125         case NL80211_CHAN_WIDTH_1:
4126         case NL80211_CHAN_WIDTH_2:
4127         case NL80211_CHAN_WIDTH_4:
4128         case NL80211_CHAN_WIDTH_8:
4129         case NL80211_CHAN_WIDTH_16:
4130         case NL80211_CHAN_WIDTH_5:
4131         case NL80211_CHAN_WIDTH_10:
4132                 WARN_ON_ONCE(1);
4133                 /* keep c->width */
4134                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
4135                 break;
4136         }
4137
4138         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4139
4140         return ret;
4141 }
4142
4143 /*
4144  * Returns true if smps_mode_new is strictly more restrictive than
4145  * smps_mode_old.
4146  */
4147 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4148                                    enum ieee80211_smps_mode smps_mode_new)
4149 {
4150         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4151                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4152                 return false;
4153
4154         switch (smps_mode_old) {
4155         case IEEE80211_SMPS_STATIC:
4156                 return false;
4157         case IEEE80211_SMPS_DYNAMIC:
4158                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4159         case IEEE80211_SMPS_OFF:
4160                 return smps_mode_new != IEEE80211_SMPS_OFF;
4161         default:
4162                 WARN_ON(1);
4163         }
4164
4165         return false;
4166 }
4167
4168 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4169                               struct cfg80211_csa_settings *csa_settings)
4170 {
4171         struct sk_buff *skb;
4172         struct ieee80211_mgmt *mgmt;
4173         struct ieee80211_local *local = sdata->local;
4174         int freq;
4175         int hdr_len = offsetofend(struct ieee80211_mgmt,
4176                                   u.action.u.chan_switch);
4177         u8 *pos;
4178
4179         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4180             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4181                 return -EOPNOTSUPP;
4182
4183         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4184                             5 + /* channel switch announcement element */
4185                             3 + /* secondary channel offset element */
4186                             5 + /* wide bandwidth channel switch announcement */
4187                             8); /* mesh channel switch parameters element */
4188         if (!skb)
4189                 return -ENOMEM;
4190
4191         skb_reserve(skb, local->tx_headroom);
4192         mgmt = skb_put_zero(skb, hdr_len);
4193         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4194                                           IEEE80211_STYPE_ACTION);
4195
4196         eth_broadcast_addr(mgmt->da);
4197         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4198         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4199                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4200         } else {
4201                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4202                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4203         }
4204         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4205         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4206         pos = skb_put(skb, 5);
4207         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4208         *pos++ = 3;                                             /* IE length */
4209         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4210         freq = csa_settings->chandef.chan->center_freq;
4211         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4212         *pos++ = csa_settings->count;                           /* count */
4213
4214         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4215                 enum nl80211_channel_type ch_type;
4216
4217                 skb_put(skb, 3);
4218                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4219                 *pos++ = 1;                                     /* IE length */
4220                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4221                 if (ch_type == NL80211_CHAN_HT40PLUS)
4222                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4223                 else
4224                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4225         }
4226
4227         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4228                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4229
4230                 skb_put(skb, 8);
4231                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4232                 *pos++ = 6;                                     /* IE length */
4233                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4234                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4235                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4236                 *pos++ |= csa_settings->block_tx ?
4237                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4238                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4239                 pos += 2;
4240                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4241                 pos += 2;
4242         }
4243
4244         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4245             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4246             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4247                 skb_put(skb, 5);
4248                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4249         }
4250
4251         ieee80211_tx_skb(sdata, skb);
4252         return 0;
4253 }
4254
4255 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4256 {
4257         return !(cs == NULL || cs->cipher == 0 ||
4258                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4259                  cs->hdr_len <= cs->key_idx_off ||
4260                  cs->key_idx_shift > 7 ||
4261                  cs->key_idx_mask == 0);
4262 }
4263
4264 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4265 {
4266         int i;
4267
4268         /* Ensure we have enough iftype bitmap space for all iftype values */
4269         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4270
4271         for (i = 0; i < n; i++)
4272                 if (!ieee80211_cs_valid(&cs[i]))
4273                         return false;
4274
4275         return true;
4276 }
4277
4278 const struct ieee80211_cipher_scheme *
4279 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4280                  enum nl80211_iftype iftype)
4281 {
4282         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4283         int n = local->hw.n_cipher_schemes;
4284         int i;
4285         const struct ieee80211_cipher_scheme *cs = NULL;
4286
4287         for (i = 0; i < n; i++) {
4288                 if (l[i].cipher == cipher) {
4289                         cs = &l[i];
4290                         break;
4291                 }
4292         }
4293
4294         if (!cs || !(cs->iftype & BIT(iftype)))
4295                 return NULL;
4296
4297         return cs;
4298 }
4299
4300 int ieee80211_cs_headroom(struct ieee80211_local *local,
4301                           struct cfg80211_crypto_settings *crypto,
4302                           enum nl80211_iftype iftype)
4303 {
4304         const struct ieee80211_cipher_scheme *cs;
4305         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4306         int i;
4307
4308         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4309                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4310                                       iftype);
4311
4312                 if (cs && headroom < cs->hdr_len)
4313                         headroom = cs->hdr_len;
4314         }
4315
4316         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4317         if (cs && headroom < cs->hdr_len)
4318                 headroom = cs->hdr_len;
4319
4320         return headroom;
4321 }
4322
4323 static bool
4324 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4325 {
4326         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4327         int skip;
4328
4329         if (end > 0)
4330                 return false;
4331
4332         /* One shot NOA  */
4333         if (data->count[i] == 1)
4334                 return false;
4335
4336         if (data->desc[i].interval == 0)
4337                 return false;
4338
4339         /* End time is in the past, check for repetitions */
4340         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4341         if (data->count[i] < 255) {
4342                 if (data->count[i] <= skip) {
4343                         data->count[i] = 0;
4344                         return false;
4345                 }
4346
4347                 data->count[i] -= skip;
4348         }
4349
4350         data->desc[i].start += skip * data->desc[i].interval;
4351
4352         return true;
4353 }
4354
4355 static bool
4356 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4357                              s32 *offset)
4358 {
4359         bool ret = false;
4360         int i;
4361
4362         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4363                 s32 cur;
4364
4365                 if (!data->count[i])
4366                         continue;
4367
4368                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4369                         ret = true;
4370
4371                 cur = data->desc[i].start - tsf;
4372                 if (cur > *offset)
4373                         continue;
4374
4375                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4376                 if (cur > *offset)
4377                         *offset = cur;
4378         }
4379
4380         return ret;
4381 }
4382
4383 static u32
4384 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4385 {
4386         s32 offset = 0;
4387         int tries = 0;
4388         /*
4389          * arbitrary limit, used to avoid infinite loops when combined NoA
4390          * descriptors cover the full time period.
4391          */
4392         int max_tries = 5;
4393
4394         ieee80211_extend_absent_time(data, tsf, &offset);
4395         do {
4396                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4397                         break;
4398
4399                 tries++;
4400         } while (tries < max_tries);
4401
4402         return offset;
4403 }
4404
4405 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4406 {
4407         u32 next_offset = BIT(31) - 1;
4408         int i;
4409
4410         data->absent = 0;
4411         data->has_next_tsf = false;
4412         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4413                 s32 start;
4414
4415                 if (!data->count[i])
4416                         continue;
4417
4418                 ieee80211_extend_noa_desc(data, tsf, i);
4419                 start = data->desc[i].start - tsf;
4420                 if (start <= 0)
4421                         data->absent |= BIT(i);
4422
4423                 if (next_offset > start)
4424                         next_offset = start;
4425
4426                 data->has_next_tsf = true;
4427         }
4428
4429         if (data->absent)
4430                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4431
4432         data->next_tsf = tsf + next_offset;
4433 }
4434 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4435
4436 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4437                             struct ieee80211_noa_data *data, u32 tsf)
4438 {
4439         int ret = 0;
4440         int i;
4441
4442         memset(data, 0, sizeof(*data));
4443
4444         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4445                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4446
4447                 if (!desc->count || !desc->duration)
4448                         continue;
4449
4450                 data->count[i] = desc->count;
4451                 data->desc[i].start = le32_to_cpu(desc->start_time);
4452                 data->desc[i].duration = le32_to_cpu(desc->duration);
4453                 data->desc[i].interval = le32_to_cpu(desc->interval);
4454
4455                 if (data->count[i] > 1 &&
4456                     data->desc[i].interval < data->desc[i].duration)
4457                         continue;
4458
4459                 ieee80211_extend_noa_desc(data, tsf, i);
4460                 ret++;
4461         }
4462
4463         if (ret)
4464                 ieee80211_update_p2p_noa(data, tsf);
4465
4466         return ret;
4467 }
4468 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4469
4470 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4471                            struct ieee80211_sub_if_data *sdata)
4472 {
4473         u64 tsf = drv_get_tsf(local, sdata);
4474         u64 dtim_count = 0;
4475         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4476         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4477         struct ps_data *ps;
4478         u8 bcns_from_dtim;
4479
4480         if (tsf == -1ULL || !beacon_int || !dtim_period)
4481                 return;
4482
4483         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4484             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4485                 if (!sdata->bss)
4486                         return;
4487
4488                 ps = &sdata->bss->ps;
4489         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4490                 ps = &sdata->u.mesh.ps;
4491         } else {
4492                 return;
4493         }
4494
4495         /*
4496          * actually finds last dtim_count, mac80211 will update in
4497          * __beacon_add_tim().
4498          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4499          */
4500         do_div(tsf, beacon_int);
4501         bcns_from_dtim = do_div(tsf, dtim_period);
4502         /* just had a DTIM */
4503         if (!bcns_from_dtim)
4504                 dtim_count = 0;
4505         else
4506                 dtim_count = dtim_period - bcns_from_dtim;
4507
4508         ps->dtim_count = dtim_count;
4509 }
4510
4511 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4512                                          struct ieee80211_chanctx *ctx)
4513 {
4514         struct ieee80211_sub_if_data *sdata;
4515         u8 radar_detect = 0;
4516
4517         lockdep_assert_held(&local->chanctx_mtx);
4518
4519         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4520                 return 0;
4521
4522         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4523                 if (sdata->reserved_radar_required)
4524                         radar_detect |= BIT(sdata->reserved_chandef.width);
4525
4526         /*
4527          * An in-place reservation context should not have any assigned vifs
4528          * until it replaces the other context.
4529          */
4530         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4531                 !list_empty(&ctx->assigned_vifs));
4532
4533         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4534                 if (sdata->radar_required)
4535                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4536
4537         return radar_detect;
4538 }
4539
4540 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4541                                  const struct cfg80211_chan_def *chandef,
4542                                  enum ieee80211_chanctx_mode chanmode,
4543                                  u8 radar_detect)
4544 {
4545         struct ieee80211_local *local = sdata->local;
4546         struct ieee80211_sub_if_data *sdata_iter;
4547         enum nl80211_iftype iftype = sdata->wdev.iftype;
4548         struct ieee80211_chanctx *ctx;
4549         int total = 1;
4550         struct iface_combination_params params = {
4551                 .radar_detect = radar_detect,
4552         };
4553
4554         lockdep_assert_held(&local->chanctx_mtx);
4555
4556         if (WARN_ON(hweight32(radar_detect) > 1))
4557                 return -EINVAL;
4558
4559         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4560                     !chandef->chan))
4561                 return -EINVAL;
4562
4563         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4564                 return -EINVAL;
4565
4566         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4567             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4568                 /*
4569                  * always passing this is harmless, since it'll be the
4570                  * same value that cfg80211 finds if it finds the same
4571                  * interface ... and that's always allowed
4572                  */
4573                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4574         }
4575
4576         /* Always allow software iftypes */
4577         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4578                 if (radar_detect)
4579                         return -EINVAL;
4580                 return 0;
4581         }
4582
4583         if (chandef)
4584                 params.num_different_channels = 1;
4585
4586         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4587                 params.iftype_num[iftype] = 1;
4588
4589         list_for_each_entry(ctx, &local->chanctx_list, list) {
4590                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4591                         continue;
4592                 params.radar_detect |=
4593                         ieee80211_chanctx_radar_detect(local, ctx);
4594                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4595                         params.num_different_channels++;
4596                         continue;
4597                 }
4598                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4599                     cfg80211_chandef_compatible(chandef,
4600                                                 &ctx->conf.def))
4601                         continue;
4602                 params.num_different_channels++;
4603         }
4604
4605         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4606                 struct wireless_dev *wdev_iter;
4607
4608                 wdev_iter = &sdata_iter->wdev;
4609
4610                 if (sdata_iter == sdata ||
4611                     !ieee80211_sdata_running(sdata_iter) ||
4612                     cfg80211_iftype_allowed(local->hw.wiphy,
4613                                             wdev_iter->iftype, 0, 1))
4614                         continue;
4615
4616                 params.iftype_num[wdev_iter->iftype]++;
4617                 total++;
4618         }
4619
4620         if (total == 1 && !params.radar_detect)
4621                 return 0;
4622
4623         return cfg80211_check_combinations(local->hw.wiphy, &params);
4624 }
4625
4626 static void
4627 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4628                          void *data)
4629 {
4630         u32 *max_num_different_channels = data;
4631
4632         *max_num_different_channels = max(*max_num_different_channels,
4633                                           c->num_different_channels);
4634 }
4635
4636 int ieee80211_max_num_channels(struct ieee80211_local *local)
4637 {
4638         struct ieee80211_sub_if_data *sdata;
4639         struct ieee80211_chanctx *ctx;
4640         u32 max_num_different_channels = 1;
4641         int err;
4642         struct iface_combination_params params = {0};
4643
4644         lockdep_assert_held(&local->chanctx_mtx);
4645
4646         list_for_each_entry(ctx, &local->chanctx_list, list) {
4647                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4648                         continue;
4649
4650                 params.num_different_channels++;
4651
4652                 params.radar_detect |=
4653                         ieee80211_chanctx_radar_detect(local, ctx);
4654         }
4655
4656         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4657                 params.iftype_num[sdata->wdev.iftype]++;
4658
4659         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4660                                          ieee80211_iter_max_chans,
4661                                          &max_num_different_channels);
4662         if (err < 0)
4663                 return err;
4664
4665         return max_num_different_channels;
4666 }
4667
4668 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4669                                 struct ieee80211_sta_s1g_cap *caps,
4670                                 struct sk_buff *skb)
4671 {
4672         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4673         struct ieee80211_s1g_cap s1g_capab;
4674         u8 *pos;
4675         int i;
4676
4677         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4678                 return;
4679
4680         if (!caps->s1g)
4681                 return;
4682
4683         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4684         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4685
4686         /* override the capability info */
4687         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4688                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4689
4690                 s1g_capab.capab_info[i] &= ~mask;
4691                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4692         }
4693
4694         /* then MCS and NSS set */
4695         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4696                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4697
4698                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4699                 s1g_capab.supp_mcs_nss[i] |=
4700                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4701         }
4702
4703         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4704         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4705         *pos++ = sizeof(s1g_capab);
4706
4707         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4708 }
4709
4710 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4711                                   struct sk_buff *skb)
4712 {
4713         u8 *pos = skb_put(skb, 3);
4714
4715         *pos++ = WLAN_EID_AID_REQUEST;
4716         *pos++ = 1;
4717         *pos++ = 0;
4718 }
4719
4720 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4721 {
4722         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4723         *buf++ = 7; /* len */
4724         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4725         *buf++ = 0x50;
4726         *buf++ = 0xf2;
4727         *buf++ = 2; /* WME */
4728         *buf++ = 0; /* WME info */
4729         *buf++ = 1; /* WME ver */
4730         *buf++ = qosinfo; /* U-APSD no in use */
4731
4732         return buf;
4733 }
4734
4735 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4736                              unsigned long *frame_cnt,
4737                              unsigned long *byte_cnt)
4738 {
4739         struct txq_info *txqi = to_txq_info(txq);
4740         u32 frag_cnt = 0, frag_bytes = 0;
4741         struct sk_buff *skb;
4742
4743         skb_queue_walk(&txqi->frags, skb) {
4744                 frag_cnt++;
4745                 frag_bytes += skb->len;
4746         }
4747
4748         if (frame_cnt)
4749                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4750
4751         if (byte_cnt)
4752                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4753 }
4754 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4755
4756 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4757         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4758         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4759         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4760         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4761 };
4762
4763 u16 ieee80211_encode_usf(int listen_interval)
4764 {
4765         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4766         u16 ui, usf = 0;
4767
4768         /* find greatest USF */
4769         while (usf < IEEE80211_MAX_USF) {
4770                 if (listen_interval % listen_int_usf[usf + 1])
4771                         break;
4772                 usf += 1;
4773         }
4774         ui = listen_interval / listen_int_usf[usf];
4775
4776         /* error if there is a remainder. Should've been checked by user */
4777         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4778         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4779                           FIELD_PREP(LISTEN_INT_UI, ui);
4780
4781         return (u16) listen_interval;
4782 }
4783
4784 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4785 {
4786         const struct ieee80211_sta_he_cap *he_cap;
4787         const struct ieee80211_sta_eht_cap *eht_cap;
4788         struct ieee80211_supported_band *sband;
4789         u8 n;
4790
4791         sband = ieee80211_get_sband(sdata);
4792         if (!sband)
4793                 return 0;
4794
4795         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4796         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4797         if (!he_cap || !eht_cap)
4798                 return 0;
4799
4800         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4801                                        &eht_cap->eht_cap_elem);
4802         return 2 + 1 +
4803                sizeof(he_cap->he_cap_elem) + n +
4804                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4805                                       eht_cap->eht_cap_elem.phy_cap_info);
4806         return 0;
4807 }
4808
4809 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
4810                                const struct ieee80211_sta_he_cap *he_cap,
4811                                const struct ieee80211_sta_eht_cap *eht_cap,
4812                                u8 *end)
4813 {
4814         u8 mcs_nss_len, ppet_len;
4815         u8 ie_len;
4816         u8 *orig_pos = pos;
4817
4818         /* Make sure we have place for the IE */
4819         if (!he_cap || !eht_cap)
4820                 return orig_pos;
4821
4822         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4823                                                  &eht_cap->eht_cap_elem);
4824         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4825                                           eht_cap->eht_cap_elem.phy_cap_info);
4826
4827         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4828         if ((end - pos) < ie_len)
4829                 return orig_pos;
4830
4831         *pos++ = WLAN_EID_EXTENSION;
4832         *pos++ = ie_len - 2;
4833         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
4834
4835         /* Fixed data */
4836         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
4837         pos += sizeof(eht_cap->eht_cap_elem);
4838
4839         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4840         pos += mcs_nss_len;
4841
4842         if (ppet_len) {
4843                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
4844                 pos += ppet_len;
4845         }
4846
4847         return pos;
4848 }