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_rtnl_is_held());
 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_atomic(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         rcu_read_lock();
 873         __iterate_stations(local, iterator, data);
 874         rcu_read_unlock();
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 877
 878 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 879 {
 880         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 881
 882         if (!ieee80211_sdata_running(sdata) ||
 883             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 884                 return NULL;
 885         return &sdata->vif;
 886 }
 887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 888
 889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 890 {
 891         if (!vif)
 892                 return NULL;
 893
 894         return &vif_to_sdata(vif)->wdev;
 895 }
 896 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 897
 898 /*
 899  * Nothing should have been stuffed into the workqueue during
 900  * the suspend->resume cycle. Since we can't check each caller
 901  * of this function if we are already quiescing / suspended,
 902  * check here and don't WARN since this can actually happen when
 903  * the rx path (for example) is racing against __ieee80211_suspend
 904  * and suspending / quiescing was set after the rx path checked
 905  * them.
 906  */
 907 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 908 {
 909         if (local->quiescing || (local->suspended && !local->resuming)) {
 910                 pr_warn("queueing ieee80211 work while going to suspend\n");
 911                 return false;
 912         }
 913
 914         return true;
 915 }
 916
 917 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 918 {
 919         struct ieee80211_local *local = hw_to_local(hw);
 920
 921         if (!ieee80211_can_queue_work(local))
 922                 return;
 923
 924         queue_work(local->workqueue, work);
 925 }
 926 EXPORT_SYMBOL(ieee80211_queue_work);
 927
 928 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 929                                   struct delayed_work *dwork,
 930                                   unsigned long delay)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_delayed_work(local->workqueue, dwork, delay);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 940
 941 static void ieee80211_parse_extension_element(u32 *crc,
 942                                               const struct element *elem,
 943                                               struct ieee802_11_elems *elems)
 944 {
 945         const void *data = elem->data + 1;
 946         u8 len = elem->datalen - 1;
 947
 948         switch (elem->data[0]) {
 949         case WLAN_EID_EXT_HE_MU_EDCA:
 950                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 951                         elems->mu_edca_param_set = data;
 952                         if (crc)
 953                                 *crc = crc32_be(*crc, (void *)elem,
 954                                                 elem->datalen + 2);
 955                 }
 956                 break;
 957         case WLAN_EID_EXT_HE_CAPABILITY:
 958                 elems->he_cap = data;
 959                 elems->he_cap_len = len;
 960                 break;
 961         case WLAN_EID_EXT_HE_OPERATION:
 962                 if (len >= sizeof(*elems->he_operation) &&
 963                     len >= ieee80211_he_oper_size(data) - 1) {
 964                         if (crc)
 965                                 *crc = crc32_be(*crc, (void *)elem,
 966                                                 elem->datalen + 2);
 967                         elems->he_operation = data;
 968                 }
 969                 break;
 970         case WLAN_EID_EXT_UORA:
 971                 if (len >= 1)
 972                         elems->uora_element = data;
 973                 break;
 974         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 975                 if (len == 3)
 976                         elems->max_channel_switch_time = data;
 977                 break;
 978         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 979                 if (len >= sizeof(*elems->mbssid_config_ie))
 980                         elems->mbssid_config_ie = data;
 981                 break;
 982         case WLAN_EID_EXT_HE_SPR:
 983                 if (len >= sizeof(*elems->he_spr) &&
 984                     len >= ieee80211_he_spr_size(data))
 985                         elems->he_spr = data;
 986                 break;
 987         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 988                 if (len >= sizeof(*elems->he_6ghz_capa))
 989                         elems->he_6ghz_capa = data;
 990                 break;
 991         }
 992 }
 993
 994 static u32
 995 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 996                             struct ieee802_11_elems *elems,
 997                             u64 filter, u32 crc,
 998                             const struct element *check_inherit)
 999 {
1000         const struct element *elem;
1001         bool calc_crc = filter != 0;
1002         DECLARE_BITMAP(seen_elems, 256);
1003         const u8 *ie;
1004
1005         bitmap_zero(seen_elems, 256);
1006
1007         for_each_element(elem, start, len) {
1008                 bool elem_parse_failed;
1009                 u8 id = elem->id;
1010                 u8 elen = elem->datalen;
1011                 const u8 *pos = elem->data;
1012
1013                 if (check_inherit &&
1014                     !cfg80211_is_element_inherited(elem,
1015                                                    check_inherit))
1016                         continue;
1017
1018                 switch (id) {
1019                 case WLAN_EID_SSID:
1020                 case WLAN_EID_SUPP_RATES:
1021                 case WLAN_EID_FH_PARAMS:
1022                 case WLAN_EID_DS_PARAMS:
1023                 case WLAN_EID_CF_PARAMS:
1024                 case WLAN_EID_TIM:
1025                 case WLAN_EID_IBSS_PARAMS:
1026                 case WLAN_EID_CHALLENGE:
1027                 case WLAN_EID_RSN:
1028                 case WLAN_EID_ERP_INFO:
1029                 case WLAN_EID_EXT_SUPP_RATES:
1030                 case WLAN_EID_HT_CAPABILITY:
1031                 case WLAN_EID_HT_OPERATION:
1032                 case WLAN_EID_VHT_CAPABILITY:
1033                 case WLAN_EID_VHT_OPERATION:
1034                 case WLAN_EID_MESH_ID:
1035                 case WLAN_EID_MESH_CONFIG:
1036                 case WLAN_EID_PEER_MGMT:
1037                 case WLAN_EID_PREQ:
1038                 case WLAN_EID_PREP:
1039                 case WLAN_EID_PERR:
1040                 case WLAN_EID_RANN:
1041                 case WLAN_EID_CHANNEL_SWITCH:
1042                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1043                 case WLAN_EID_COUNTRY:
1044                 case WLAN_EID_PWR_CONSTRAINT:
1045                 case WLAN_EID_TIMEOUT_INTERVAL:
1046                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1048                 case WLAN_EID_CHAN_SWITCH_PARAM:
1049                 case WLAN_EID_EXT_CAPABILITY:
1050                 case WLAN_EID_CHAN_SWITCH_TIMING:
1051                 case WLAN_EID_LINK_ID:
1052                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1053                 case WLAN_EID_RSNX:
1054                 case WLAN_EID_S1G_BCN_COMPAT:
1055                 case WLAN_EID_S1G_CAPABILITIES:
1056                 case WLAN_EID_S1G_OPERATION:
1057                 case WLAN_EID_AID_RESPONSE:
1058                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1059                 /*
1060                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1061                  * that if the content gets bigger it might be needed more than once
1062                  */
1063                         if (test_bit(id, seen_elems)) {
1064                                 elems->parse_error = true;
1065                                 continue;
1066                         }
1067                         break;
1068                 }
1069
1070                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1071                         crc = crc32_be(crc, pos - 2, elen + 2);
1072
1073                 elem_parse_failed = false;
1074
1075                 switch (id) {
1076                 case WLAN_EID_LINK_ID:
1077                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1078                                 elem_parse_failed = true;
1079                                 break;
1080                         }
1081                         elems->lnk_id = (void *)(pos - 2);
1082                         break;
1083                 case WLAN_EID_CHAN_SWITCH_TIMING:
1084                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1085                                 elem_parse_failed = true;
1086                                 break;
1087                         }
1088                         elems->ch_sw_timing = (void *)pos;
1089                         break;
1090                 case WLAN_EID_EXT_CAPABILITY:
1091                         elems->ext_capab = pos;
1092                         elems->ext_capab_len = elen;
1093                         break;
1094                 case WLAN_EID_SSID:
1095                         elems->ssid = pos;
1096                         elems->ssid_len = elen;
1097                         break;
1098                 case WLAN_EID_SUPP_RATES:
1099                         elems->supp_rates = pos;
1100                         elems->supp_rates_len = elen;
1101                         break;
1102                 case WLAN_EID_DS_PARAMS:
1103                         if (elen >= 1)
1104                                 elems->ds_params = pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 case WLAN_EID_TIM:
1109                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1110                                 elems->tim = (void *)pos;
1111                                 elems->tim_len = elen;
1112                         } else
1113                                 elem_parse_failed = true;
1114                         break;
1115                 case WLAN_EID_CHALLENGE:
1116                         elems->challenge = pos;
1117                         elems->challenge_len = elen;
1118                         break;
1119                 case WLAN_EID_VENDOR_SPECIFIC:
1120                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1121                             pos[2] == 0xf2) {
1122                                 /* Microsoft OUI (00:50:F2) */
1123
1124                                 if (calc_crc)
1125                                         crc = crc32_be(crc, pos - 2, elen + 2);
1126
1127                                 if (elen >= 5 && pos[3] == 2) {
1128                                         /* OUI Type 2 - WMM IE */
1129                                         if (pos[4] == 0) {
1130                                                 elems->wmm_info = pos;
1131                                                 elems->wmm_info_len = elen;
1132                                         } else if (pos[4] == 1) {
1133                                                 elems->wmm_param = pos;
1134                                                 elems->wmm_param_len = elen;
1135                                         }
1136                                 }
1137                         }
1138                         break;
1139                 case WLAN_EID_RSN:
1140                         elems->rsn = pos;
1141                         elems->rsn_len = elen;
1142                         break;
1143                 case WLAN_EID_ERP_INFO:
1144                         if (elen >= 1)
1145                                 elems->erp_info = pos;
1146                         else
1147                                 elem_parse_failed = true;
1148                         break;
1149                 case WLAN_EID_EXT_SUPP_RATES:
1150                         elems->ext_supp_rates = pos;
1151                         elems->ext_supp_rates_len = elen;
1152                         break;
1153                 case WLAN_EID_HT_CAPABILITY:
1154                         if (elen >= sizeof(struct ieee80211_ht_cap))
1155                                 elems->ht_cap_elem = (void *)pos;
1156                         else
1157                                 elem_parse_failed = true;
1158                         break;
1159                 case WLAN_EID_HT_OPERATION:
1160                         if (elen >= sizeof(struct ieee80211_ht_operation))
1161                                 elems->ht_operation = (void *)pos;
1162                         else
1163                                 elem_parse_failed = true;
1164                         break;
1165                 case WLAN_EID_VHT_CAPABILITY:
1166                         if (elen >= sizeof(struct ieee80211_vht_cap))
1167                                 elems->vht_cap_elem = (void *)pos;
1168                         else
1169                                 elem_parse_failed = true;
1170                         break;
1171                 case WLAN_EID_VHT_OPERATION:
1172                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1173                                 elems->vht_operation = (void *)pos;
1174                                 if (calc_crc)
1175                                         crc = crc32_be(crc, pos - 2, elen + 2);
1176                                 break;
1177                         }
1178                         elem_parse_failed = true;
1179                         break;
1180                 case WLAN_EID_OPMODE_NOTIF:
1181                         if (elen > 0) {
1182                                 elems->opmode_notif = pos;
1183                                 if (calc_crc)
1184                                         crc = crc32_be(crc, pos - 2, elen + 2);
1185                                 break;
1186                         }
1187                         elem_parse_failed = true;
1188                         break;
1189                 case WLAN_EID_MESH_ID:
1190                         elems->mesh_id = pos;
1191                         elems->mesh_id_len = elen;
1192                         break;
1193                 case WLAN_EID_MESH_CONFIG:
1194                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1195                                 elems->mesh_config = (void *)pos;
1196                         else
1197                                 elem_parse_failed = true;
1198                         break;
1199                 case WLAN_EID_PEER_MGMT:
1200                         elems->peering = pos;
1201                         elems->peering_len = elen;
1202                         break;
1203                 case WLAN_EID_MESH_AWAKE_WINDOW:
1204                         if (elen >= 2)
1205                                 elems->awake_window = (void *)pos;
1206                         break;
1207                 case WLAN_EID_PREQ:
1208                         elems->preq = pos;
1209                         elems->preq_len = elen;
1210                         break;
1211                 case WLAN_EID_PREP:
1212                         elems->prep = pos;
1213                         elems->prep_len = elen;
1214                         break;
1215                 case WLAN_EID_PERR:
1216                         elems->perr = pos;
1217                         elems->perr_len = elen;
1218                         break;
1219                 case WLAN_EID_RANN:
1220                         if (elen >= sizeof(struct ieee80211_rann_ie))
1221                                 elems->rann = (void *)pos;
1222                         else
1223                                 elem_parse_failed = true;
1224                         break;
1225                 case WLAN_EID_CHANNEL_SWITCH:
1226                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1227                                 elem_parse_failed = true;
1228                                 break;
1229                         }
1230                         elems->ch_switch_ie = (void *)pos;
1231                         break;
1232                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1233                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1234                                 elem_parse_failed = true;
1235                                 break;
1236                         }
1237                         elems->ext_chansw_ie = (void *)pos;
1238                         break;
1239                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1240                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1241                                 elem_parse_failed = true;
1242                                 break;
1243                         }
1244                         elems->sec_chan_offs = (void *)pos;
1245                         break;
1246                 case WLAN_EID_CHAN_SWITCH_PARAM:
1247                         if (elen <
1248                             sizeof(*elems->mesh_chansw_params_ie)) {
1249                                 elem_parse_failed = true;
1250                                 break;
1251                         }
1252                         elems->mesh_chansw_params_ie = (void *)pos;
1253                         break;
1254                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1255                         if (!action ||
1256                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1257                                 elem_parse_failed = true;
1258                                 break;
1259                         }
1260                         elems->wide_bw_chansw_ie = (void *)pos;
1261                         break;
1262                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1263                         if (action) {
1264                                 elem_parse_failed = true;
1265                                 break;
1266                         }
1267                         /*
1268                          * This is a bit tricky, but as we only care about
1269                          * the wide bandwidth channel switch element, so
1270                          * just parse it out manually.
1271                          */
1272                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1273                                               pos, elen);
1274                         if (ie) {
1275                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1276                                         elems->wide_bw_chansw_ie =
1277                                                 (void *)(ie + 2);
1278                                 else
1279                                         elem_parse_failed = true;
1280                         }
1281                         break;
1282                 case WLAN_EID_COUNTRY:
1283                         elems->country_elem = pos;
1284                         elems->country_elem_len = elen;
1285                         break;
1286                 case WLAN_EID_PWR_CONSTRAINT:
1287                         if (elen != 1) {
1288                                 elem_parse_failed = true;
1289                                 break;
1290                         }
1291                         elems->pwr_constr_elem = pos;
1292                         break;
1293                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1294                         /* Lots of different options exist, but we only care
1295                          * about the Dynamic Transmit Power Control element.
1296                          * First check for the Cisco OUI, then for the DTPC
1297                          * tag (0x00).
1298                          */
1299                         if (elen < 4) {
1300                                 elem_parse_failed = true;
1301                                 break;
1302                         }
1303
1304                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1305                             pos[2] != 0x96 || pos[3] != 0x00)
1306                                 break;
1307
1308                         if (elen != 6) {
1309                                 elem_parse_failed = true;
1310                                 break;
1311                         }
1312
1313                         if (calc_crc)
1314                                 crc = crc32_be(crc, pos - 2, elen + 2);
1315
1316                         elems->cisco_dtpc_elem = pos;
1317                         break;
1318                 case WLAN_EID_ADDBA_EXT:
1319                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1320                                 elem_parse_failed = true;
1321                                 break;
1322                         }
1323                         elems->addba_ext_ie = (void *)pos;
1324                         break;
1325                 case WLAN_EID_TIMEOUT_INTERVAL:
1326                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1327                                 elems->timeout_int = (void *)pos;
1328                         else
1329                                 elem_parse_failed = true;
1330                         break;
1331                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1332                         if (elen >= sizeof(*elems->max_idle_period_ie))
1333                                 elems->max_idle_period_ie = (void *)pos;
1334                         break;
1335                 case WLAN_EID_RSNX:
1336                         elems->rsnx = pos;
1337                         elems->rsnx_len = elen;
1338                         break;
1339                 case WLAN_EID_EXTENSION:
1340                         ieee80211_parse_extension_element(calc_crc ?
1341                                                                 &crc : NULL,
1342                                                           elem, elems);
1343                         break;
1344                 case WLAN_EID_S1G_CAPABILITIES:
1345                         if (elen >= sizeof(*elems->s1g_capab))
1346                                 elems->s1g_capab = (void *)pos;
1347                         else
1348                                 elem_parse_failed = true;
1349                         break;
1350                 case WLAN_EID_S1G_OPERATION:
1351                         if (elen == sizeof(*elems->s1g_oper))
1352                                 elems->s1g_oper = (void *)pos;
1353                         else
1354                                 elem_parse_failed = true;
1355                         break;
1356                 case WLAN_EID_S1G_BCN_COMPAT:
1357                         if (elen == sizeof(*elems->s1g_bcn_compat))
1358                                 elems->s1g_bcn_compat = (void *)pos;
1359                         else
1360                                 elem_parse_failed = true;
1361                         break;
1362                 case WLAN_EID_AID_RESPONSE:
1363                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1364                                 elems->aid_resp = (void *)pos;
1365                         else
1366                                 elem_parse_failed = true;
1367                         break;
1368                 default:
1369                         break;
1370                 }
1371
1372                 if (elem_parse_failed)
1373                         elems->parse_error = true;
1374                 else
1375                         __set_bit(id, seen_elems);
1376         }
1377
1378         if (!for_each_element_completed(elem, start, len))
1379                 elems->parse_error = true;
1380
1381         return crc;
1382 }
1383
1384 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1385                                             struct ieee802_11_elems *elems,
1386                                             u8 *transmitter_bssid,
1387                                             u8 *bss_bssid,
1388                                             u8 *nontransmitted_profile)
1389 {
1390         const struct element *elem, *sub;
1391         size_t profile_len = 0;
1392         bool found = false;
1393
1394         if (!bss_bssid || !transmitter_bssid)
1395                 return profile_len;
1396
1397         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1398                 if (elem->datalen < 2)
1399                         continue;
1400
1401                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1402                         u8 new_bssid[ETH_ALEN];
1403                         const u8 *index;
1404
1405                         if (sub->id != 0 || sub->datalen < 4) {
1406                                 /* not a valid BSS profile */
1407                                 continue;
1408                         }
1409
1410                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1411                             sub->data[1] != 2) {
1412                                 /* The first element of the
1413                                  * Nontransmitted BSSID Profile is not
1414                                  * the Nontransmitted BSSID Capability
1415                                  * element.
1416                                  */
1417                                 continue;
1418                         }
1419
1420                         memset(nontransmitted_profile, 0, len);
1421                         profile_len = cfg80211_merge_profile(start, len,
1422                                                              elem,
1423                                                              sub,
1424                                                              nontransmitted_profile,
1425                                                              len);
1426
1427                         /* found a Nontransmitted BSSID Profile */
1428                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1429                                                  nontransmitted_profile,
1430                                                  profile_len);
1431                         if (!index || index[1] < 1 || index[2] == 0) {
1432                                 /* Invalid MBSSID Index element */
1433                                 continue;
1434                         }
1435
1436                         cfg80211_gen_new_bssid(transmitter_bssid,
1437                                                elem->data[0],
1438                                                index[2],
1439                                                new_bssid);
1440                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1441                                 found = true;
1442                                 elems->bssid_index_len = index[1];
1443                                 elems->bssid_index = (void *)&index[2];
1444                                 break;
1445                         }
1446                 }
1447         }
1448
1449         return found ? profile_len : 0;
1450 }
1451
1452 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1453                                struct ieee802_11_elems *elems,
1454                                u64 filter, u32 crc, u8 *transmitter_bssid,
1455                                u8 *bss_bssid)
1456 {
1457         const struct element *non_inherit = NULL;
1458         u8 *nontransmitted_profile;
1459         int nontransmitted_profile_len = 0;
1460
1461         memset(elems, 0, sizeof(*elems));
1462         elems->ie_start = start;
1463         elems->total_len = len;
1464
1465         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1466         if (nontransmitted_profile) {
1467                 nontransmitted_profile_len =
1468                         ieee802_11_find_bssid_profile(start, len, elems,
1469                                                       transmitter_bssid,
1470                                                       bss_bssid,
1471                                                       nontransmitted_profile);
1472                 non_inherit =
1473                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1474                                                nontransmitted_profile,
1475                                                nontransmitted_profile_len);
1476         }
1477
1478         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1479                                           crc, non_inherit);
1480
1481         /* Override with nontransmitted profile, if found */
1482         if (nontransmitted_profile_len)
1483                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1484                                             nontransmitted_profile_len,
1485                                             action, elems, 0, 0, NULL);
1486
1487         if (elems->tim && !elems->parse_error) {
1488                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1489
1490                 elems->dtim_period = tim_ie->dtim_period;
1491                 elems->dtim_count = tim_ie->dtim_count;
1492         }
1493
1494         /* Override DTIM period and count if needed */
1495         if (elems->bssid_index &&
1496             elems->bssid_index_len >=
1497             offsetofend(struct ieee80211_bssid_index, dtim_period))
1498                 elems->dtim_period = elems->bssid_index->dtim_period;
1499
1500         if (elems->bssid_index &&
1501             elems->bssid_index_len >=
1502             offsetofend(struct ieee80211_bssid_index, dtim_count))
1503                 elems->dtim_count = elems->bssid_index->dtim_count;
1504
1505         kfree(nontransmitted_profile);
1506
1507         return crc;
1508 }
1509
1510 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1511                                            struct ieee80211_tx_queue_params
1512                                            *qparam, int ac)
1513 {
1514         struct ieee80211_chanctx_conf *chanctx_conf;
1515         const struct ieee80211_reg_rule *rrule;
1516         const struct ieee80211_wmm_ac *wmm_ac;
1517         u16 center_freq = 0;
1518
1519         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1520             sdata->vif.type != NL80211_IFTYPE_STATION)
1521                 return;
1522
1523         rcu_read_lock();
1524         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1525         if (chanctx_conf)
1526                 center_freq = chanctx_conf->def.chan->center_freq;
1527
1528         if (!center_freq) {
1529                 rcu_read_unlock();
1530                 return;
1531         }
1532
1533         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1534
1535         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1536                 rcu_read_unlock();
1537                 return;
1538         }
1539
1540         if (sdata->vif.type == NL80211_IFTYPE_AP)
1541                 wmm_ac = &rrule->wmm_rule.ap[ac];
1542         else
1543                 wmm_ac = &rrule->wmm_rule.client[ac];
1544         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1545         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1546         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1547         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1548         rcu_read_unlock();
1549 }
1550
1551 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1552                                bool bss_notify, bool enable_qos)
1553 {
1554         struct ieee80211_local *local = sdata->local;
1555         struct ieee80211_tx_queue_params qparam;
1556         struct ieee80211_chanctx_conf *chanctx_conf;
1557         int ac;
1558         bool use_11b;
1559         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1560         int aCWmin, aCWmax;
1561
1562         if (!local->ops->conf_tx)
1563                 return;
1564
1565         if (local->hw.queues < IEEE80211_NUM_ACS)
1566                 return;
1567
1568         memset(&qparam, 0, sizeof(qparam));
1569
1570         rcu_read_lock();
1571         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1572         use_11b = (chanctx_conf &&
1573                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1574                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1575         rcu_read_unlock();
1576
1577         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1578
1579         /* Set defaults according to 802.11-2007 Table 7-37 */
1580         aCWmax = 1023;
1581         if (use_11b)
1582                 aCWmin = 31;
1583         else
1584                 aCWmin = 15;
1585
1586         /* Confiure old 802.11b/g medium access rules. */
1587         qparam.cw_max = aCWmax;
1588         qparam.cw_min = aCWmin;
1589         qparam.txop = 0;
1590         qparam.aifs = 2;
1591
1592         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1593                 /* Update if QoS is enabled. */
1594                 if (enable_qos) {
1595                         switch (ac) {
1596                         case IEEE80211_AC_BK:
1597                                 qparam.cw_max = aCWmax;
1598                                 qparam.cw_min = aCWmin;
1599                                 qparam.txop = 0;
1600                                 if (is_ocb)
1601                                         qparam.aifs = 9;
1602                                 else
1603                                         qparam.aifs = 7;
1604                                 break;
1605                         /* never happens but let's not leave undefined */
1606                         default:
1607                         case IEEE80211_AC_BE:
1608                                 qparam.cw_max = aCWmax;
1609                                 qparam.cw_min = aCWmin;
1610                                 qparam.txop = 0;
1611                                 if (is_ocb)
1612                                         qparam.aifs = 6;
1613                                 else
1614                                         qparam.aifs = 3;
1615                                 break;
1616                         case IEEE80211_AC_VI:
1617                                 qparam.cw_max = aCWmin;
1618                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1619                                 if (is_ocb)
1620                                         qparam.txop = 0;
1621                                 else if (use_11b)
1622                                         qparam.txop = 6016/32;
1623                                 else
1624                                         qparam.txop = 3008/32;
1625
1626                                 if (is_ocb)
1627                                         qparam.aifs = 3;
1628                                 else
1629                                         qparam.aifs = 2;
1630                                 break;
1631                         case IEEE80211_AC_VO:
1632                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1633                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1634                                 if (is_ocb)
1635                                         qparam.txop = 0;
1636                                 else if (use_11b)
1637                                         qparam.txop = 3264/32;
1638                                 else
1639                                         qparam.txop = 1504/32;
1640                                 qparam.aifs = 2;
1641                                 break;
1642                         }
1643                 }
1644                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1645
1646                 qparam.uapsd = false;
1647
1648                 sdata->tx_conf[ac] = qparam;
1649                 drv_conf_tx(local, sdata, ac, &qparam);
1650         }
1651
1652         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1653             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1654             sdata->vif.type != NL80211_IFTYPE_NAN) {
1655                 sdata->vif.bss_conf.qos = enable_qos;
1656                 if (bss_notify)
1657                         ieee80211_bss_info_change_notify(sdata,
1658                                                          BSS_CHANGED_QOS);
1659         }
1660 }
1661
1662 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1663                          u16 transaction, u16 auth_alg, u16 status,
1664                          const u8 *extra, size_t extra_len, const u8 *da,
1665                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1666                          u32 tx_flags)
1667 {
1668         struct ieee80211_local *local = sdata->local;
1669         struct sk_buff *skb;
1670         struct ieee80211_mgmt *mgmt;
1671         int err;
1672
1673         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1674         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1675                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1676         if (!skb)
1677                 return;
1678
1679         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1680
1681         mgmt = skb_put_zero(skb, 24 + 6);
1682         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1683                                           IEEE80211_STYPE_AUTH);
1684         memcpy(mgmt->da, da, ETH_ALEN);
1685         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1686         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1687         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1688         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1689         mgmt->u.auth.status_code = cpu_to_le16(status);
1690         if (extra)
1691                 skb_put_data(skb, extra, extra_len);
1692
1693         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1694                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1695                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1696                 if (WARN_ON(err)) {
1697                         kfree_skb(skb);
1698                         return;
1699                 }
1700         }
1701
1702         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1703                                         tx_flags;
1704         ieee80211_tx_skb(sdata, skb);
1705 }
1706
1707 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1708                                     const u8 *da, const u8 *bssid,
1709                                     u16 stype, u16 reason,
1710                                     bool send_frame, u8 *frame_buf)
1711 {
1712         struct ieee80211_local *local = sdata->local;
1713         struct sk_buff *skb;
1714         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1715
1716         /* build frame */
1717         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1718         mgmt->duration = 0; /* initialize only */
1719         mgmt->seq_ctrl = 0; /* initialize only */
1720         memcpy(mgmt->da, da, ETH_ALEN);
1721         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1722         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1723         /* u.deauth.reason_code == u.disassoc.reason_code */
1724         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1725
1726         if (send_frame) {
1727                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1728                                     IEEE80211_DEAUTH_FRAME_LEN);
1729                 if (!skb)
1730                         return;
1731
1732                 skb_reserve(skb, local->hw.extra_tx_headroom);
1733
1734                 /* copy in frame */
1735                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1736
1737                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1738                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1739                         IEEE80211_SKB_CB(skb)->flags |=
1740                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1741
1742                 ieee80211_tx_skb(sdata, skb);
1743         }
1744 }
1745
1746 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1747 {
1748         if ((end - pos) < 5)
1749                 return pos;
1750
1751         *pos++ = WLAN_EID_EXTENSION;
1752         *pos++ = 1 + sizeof(cap);
1753         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1754         memcpy(pos, &cap, sizeof(cap));
1755
1756         return pos + 2;
1757 }
1758
1759 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1760                                          u8 *buffer, size_t buffer_len,
1761                                          const u8 *ie, size_t ie_len,
1762                                          enum nl80211_band band,
1763                                          u32 rate_mask,
1764                                          struct cfg80211_chan_def *chandef,
1765                                          size_t *offset, u32 flags)
1766 {
1767         struct ieee80211_local *local = sdata->local;
1768         struct ieee80211_supported_band *sband;
1769         const struct ieee80211_sta_he_cap *he_cap;
1770         u8 *pos = buffer, *end = buffer + buffer_len;
1771         size_t noffset;
1772         int supp_rates_len, i;
1773         u8 rates[32];
1774         int num_rates;
1775         int ext_rates_len;
1776         int shift;
1777         u32 rate_flags;
1778         bool have_80mhz = false;
1779
1780         *offset = 0;
1781
1782         sband = local->hw.wiphy->bands[band];
1783         if (WARN_ON_ONCE(!sband))
1784                 return 0;
1785
1786         rate_flags = ieee80211_chandef_rate_flags(chandef);
1787         shift = ieee80211_chandef_get_shift(chandef);
1788
1789         num_rates = 0;
1790         for (i = 0; i < sband->n_bitrates; i++) {
1791                 if ((BIT(i) & rate_mask) == 0)
1792                         continue; /* skip rate */
1793                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1794                         continue;
1795
1796                 rates[num_rates++] =
1797                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1798                                           (1 << shift) * 5);
1799         }
1800
1801         supp_rates_len = min_t(int, num_rates, 8);
1802
1803         if (end - pos < 2 + supp_rates_len)
1804                 goto out_err;
1805         *pos++ = WLAN_EID_SUPP_RATES;
1806         *pos++ = supp_rates_len;
1807         memcpy(pos, rates, supp_rates_len);
1808         pos += supp_rates_len;
1809
1810         /* insert "request information" if in custom IEs */
1811         if (ie && ie_len) {
1812                 static const u8 before_extrates[] = {
1813                         WLAN_EID_SSID,
1814                         WLAN_EID_SUPP_RATES,
1815                         WLAN_EID_REQUEST,
1816                 };
1817                 noffset = ieee80211_ie_split(ie, ie_len,
1818                                              before_extrates,
1819                                              ARRAY_SIZE(before_extrates),
1820                                              *offset);
1821                 if (end - pos < noffset - *offset)
1822                         goto out_err;
1823                 memcpy(pos, ie + *offset, noffset - *offset);
1824                 pos += noffset - *offset;
1825                 *offset = noffset;
1826         }
1827
1828         ext_rates_len = num_rates - supp_rates_len;
1829         if (ext_rates_len > 0) {
1830                 if (end - pos < 2 + ext_rates_len)
1831                         goto out_err;
1832                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1833                 *pos++ = ext_rates_len;
1834                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1835                 pos += ext_rates_len;
1836         }
1837
1838         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1839                 if (end - pos < 3)
1840                         goto out_err;
1841                 *pos++ = WLAN_EID_DS_PARAMS;
1842                 *pos++ = 1;
1843                 *pos++ = ieee80211_frequency_to_channel(
1844                                 chandef->chan->center_freq);
1845         }
1846
1847         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1848                 goto done;
1849
1850         /* insert custom IEs that go before HT */
1851         if (ie && ie_len) {
1852                 static const u8 before_ht[] = {
1853                         /*
1854                          * no need to list the ones split off already
1855                          * (or generated here)
1856                          */
1857                         WLAN_EID_DS_PARAMS,
1858                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1859                 };
1860                 noffset = ieee80211_ie_split(ie, ie_len,
1861                                              before_ht, ARRAY_SIZE(before_ht),
1862                                              *offset);
1863                 if (end - pos < noffset - *offset)
1864                         goto out_err;
1865                 memcpy(pos, ie + *offset, noffset - *offset);
1866                 pos += noffset - *offset;
1867                 *offset = noffset;
1868         }
1869
1870         if (sband->ht_cap.ht_supported) {
1871                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1872                         goto out_err;
1873                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1874                                                 sband->ht_cap.cap);
1875         }
1876
1877         /* insert custom IEs that go before VHT */
1878         if (ie && ie_len) {
1879                 static const u8 before_vht[] = {
1880                         /*
1881                          * no need to list the ones split off already
1882                          * (or generated here)
1883                          */
1884                         WLAN_EID_BSS_COEX_2040,
1885                         WLAN_EID_EXT_CAPABILITY,
1886                         WLAN_EID_SSID_LIST,
1887                         WLAN_EID_CHANNEL_USAGE,
1888                         WLAN_EID_INTERWORKING,
1889                         WLAN_EID_MESH_ID,
1890                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1891                 };
1892                 noffset = ieee80211_ie_split(ie, ie_len,
1893                                              before_vht, ARRAY_SIZE(before_vht),
1894                                              *offset);
1895                 if (end - pos < noffset - *offset)
1896                         goto out_err;
1897                 memcpy(pos, ie + *offset, noffset - *offset);
1898                 pos += noffset - *offset;
1899                 *offset = noffset;
1900         }
1901
1902         /* Check if any channel in this sband supports at least 80 MHz */
1903         for (i = 0; i < sband->n_channels; i++) {
1904                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1905                                                 IEEE80211_CHAN_NO_80MHZ))
1906                         continue;
1907
1908                 have_80mhz = true;
1909                 break;
1910         }
1911
1912         if (sband->vht_cap.vht_supported && have_80mhz) {
1913                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1914                         goto out_err;
1915                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1916                                                  sband->vht_cap.cap);
1917         }
1918
1919         /* insert custom IEs that go before HE */
1920         if (ie && ie_len) {
1921                 static const u8 before_he[] = {
1922                         /*
1923                          * no need to list the ones split off before VHT
1924                          * or generated here
1925                          */
1926                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1927                         WLAN_EID_AP_CSN,
1928                         /* TODO: add 11ah/11aj/11ak elements */
1929                 };
1930                 noffset = ieee80211_ie_split(ie, ie_len,
1931                                              before_he, ARRAY_SIZE(before_he),
1932                                              *offset);
1933                 if (end - pos < noffset - *offset)
1934                         goto out_err;
1935                 memcpy(pos, ie + *offset, noffset - *offset);
1936                 pos += noffset - *offset;
1937                 *offset = noffset;
1938         }
1939
1940         he_cap = ieee80211_get_he_iftype_cap(sband,
1941                                              ieee80211_vif_type_p2p(&sdata->vif));
1942         if (he_cap &&
1943             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1944                                          IEEE80211_CHAN_NO_HE)) {
1945                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1946                 if (!pos)
1947                         goto out_err;
1948         }
1949
1950         if (cfg80211_any_usable_channels(local->hw.wiphy,
1951                                          BIT(NL80211_BAND_6GHZ),
1952                                          IEEE80211_CHAN_NO_HE)) {
1953                 struct ieee80211_supported_band *sband6;
1954
1955                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1956                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1957                                 ieee80211_vif_type_p2p(&sdata->vif));
1958
1959                 if (he_cap) {
1960                         enum nl80211_iftype iftype =
1961                                 ieee80211_vif_type_p2p(&sdata->vif);
1962                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1963
1964                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1965                 }
1966         }
1967
1968         /*
1969          * If adding more here, adjust code in main.c
1970          * that calculates local->scan_ies_len.
1971          */
1972
1973         return pos - buffer;
1974  out_err:
1975         WARN_ONCE(1, "not enough space for preq IEs\n");
1976  done:
1977         return pos - buffer;
1978 }
1979
1980 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1981                              size_t buffer_len,
1982                              struct ieee80211_scan_ies *ie_desc,
1983                              const u8 *ie, size_t ie_len,
1984                              u8 bands_used, u32 *rate_masks,
1985                              struct cfg80211_chan_def *chandef,
1986                              u32 flags)
1987 {
1988         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1989         int i;
1990
1991         memset(ie_desc, 0, sizeof(*ie_desc));
1992
1993         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1994                 if (bands_used & BIT(i)) {
1995                         pos += ieee80211_build_preq_ies_band(sdata,
1996                                                              buffer + pos,
1997                                                              buffer_len - pos,
1998                                                              ie, ie_len, i,
1999                                                              rate_masks[i],
2000                                                              chandef,
2001                                                              &custom_ie_offset,
2002                                                              flags);
2003                         ie_desc->ies[i] = buffer + old_pos;
2004                         ie_desc->len[i] = pos - old_pos;
2005                         old_pos = pos;
2006                 }
2007         }
2008
2009         /* add any remaining custom IEs */
2010         if (ie && ie_len) {
2011                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2012                               "not enough space for preq custom IEs\n"))
2013                         return pos;
2014                 memcpy(buffer + pos, ie + custom_ie_offset,
2015                        ie_len - custom_ie_offset);
2016                 ie_desc->common_ies = buffer + pos;
2017                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2018                 pos += ie_len - custom_ie_offset;
2019         }
2020
2021         return pos;
2022 };
2023
2024 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2025                                           const u8 *src, const u8 *dst,
2026                                           u32 ratemask,
2027                                           struct ieee80211_channel *chan,
2028                                           const u8 *ssid, size_t ssid_len,
2029                                           const u8 *ie, size_t ie_len,
2030                                           u32 flags)
2031 {
2032         struct ieee80211_local *local = sdata->local;
2033         struct cfg80211_chan_def chandef;
2034         struct sk_buff *skb;
2035         struct ieee80211_mgmt *mgmt;
2036         int ies_len;
2037         u32 rate_masks[NUM_NL80211_BANDS] = {};
2038         struct ieee80211_scan_ies dummy_ie_desc;
2039
2040         /*
2041          * Do not send DS Channel parameter for directed probe requests
2042          * in order to maximize the chance that we get a response.  Some
2043          * badly-behaved APs don't respond when this parameter is included.
2044          */
2045         chandef.width = sdata->vif.bss_conf.chandef.width;
2046         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2047                 chandef.chan = NULL;
2048         else
2049                 chandef.chan = chan;
2050
2051         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2052                                      100 + ie_len);
2053         if (!skb)
2054                 return NULL;
2055
2056         rate_masks[chan->band] = ratemask;
2057         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2058                                            skb_tailroom(skb), &dummy_ie_desc,
2059                                            ie, ie_len, BIT(chan->band),
2060                                            rate_masks, &chandef, flags);
2061         skb_put(skb, ies_len);
2062
2063         if (dst) {
2064                 mgmt = (struct ieee80211_mgmt *) skb->data;
2065                 memcpy(mgmt->da, dst, ETH_ALEN);
2066                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2067         }
2068
2069         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2070
2071         return skb;
2072 }
2073
2074 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2075                             struct ieee802_11_elems *elems,
2076                             enum nl80211_band band, u32 *basic_rates)
2077 {
2078         struct ieee80211_supported_band *sband;
2079         size_t num_rates;
2080         u32 supp_rates, rate_flags;
2081         int i, j, shift;
2082
2083         sband = sdata->local->hw.wiphy->bands[band];
2084         if (WARN_ON(!sband))
2085                 return 1;
2086
2087         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2088         shift = ieee80211_vif_get_shift(&sdata->vif);
2089
2090         num_rates = sband->n_bitrates;
2091         supp_rates = 0;
2092         for (i = 0; i < elems->supp_rates_len +
2093                      elems->ext_supp_rates_len; i++) {
2094                 u8 rate = 0;
2095                 int own_rate;
2096                 bool is_basic;
2097                 if (i < elems->supp_rates_len)
2098                         rate = elems->supp_rates[i];
2099                 else if (elems->ext_supp_rates)
2100                         rate = elems->ext_supp_rates
2101                                 [i - elems->supp_rates_len];
2102                 own_rate = 5 * (rate & 0x7f);
2103                 is_basic = !!(rate & 0x80);
2104
2105                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2106                         continue;
2107
2108                 for (j = 0; j < num_rates; j++) {
2109                         int brate;
2110                         if ((rate_flags & sband->bitrates[j].flags)
2111                             != rate_flags)
2112                                 continue;
2113
2114                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2115                                              1 << shift);
2116
2117                         if (brate == own_rate) {
2118                                 supp_rates |= BIT(j);
2119                                 if (basic_rates && is_basic)
2120                                         *basic_rates |= BIT(j);
2121                         }
2122                 }
2123         }
2124         return supp_rates;
2125 }
2126
2127 void ieee80211_stop_device(struct ieee80211_local *local)
2128 {
2129         ieee80211_led_radio(local, false);
2130         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2131
2132         cancel_work_sync(&local->reconfig_filter);
2133
2134         flush_workqueue(local->workqueue);
2135         drv_stop(local);
2136 }
2137
2138 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2139                                            bool aborted)
2140 {
2141         /* It's possible that we don't handle the scan completion in
2142          * time during suspend, so if it's still marked as completed
2143          * here, queue the work and flush it to clean things up.
2144          * Instead of calling the worker function directly here, we
2145          * really queue it to avoid potential races with other flows
2146          * scheduling the same work.
2147          */
2148         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2149                 /* If coming from reconfiguration failure, abort the scan so
2150                  * we don't attempt to continue a partial HW scan - which is
2151                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2152                  * completed scan, and a 5 GHz portion is still pending.
2153                  */
2154                 if (aborted)
2155                         set_bit(SCAN_ABORTED, &local->scanning);
2156                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2157                 flush_delayed_work(&local->scan_work);
2158         }
2159 }
2160
2161 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2162 {
2163         struct ieee80211_sub_if_data *sdata;
2164         struct ieee80211_chanctx *ctx;
2165
2166         /*
2167          * We get here if during resume the device can't be restarted properly.
2168          * We might also get here if this happens during HW reset, which is a
2169          * slightly different situation and we need to drop all connections in
2170          * the latter case.
2171          *
2172          * Ask cfg80211 to turn off all interfaces, this will result in more
2173          * warnings but at least we'll then get into a clean stopped state.
2174          */
2175
2176         local->resuming = false;
2177         local->suspended = false;
2178         local->in_reconfig = false;
2179
2180         ieee80211_flush_completed_scan(local, true);
2181
2182         /* scheduled scan clearly can't be running any more, but tell
2183          * cfg80211 and clear local state
2184          */
2185         ieee80211_sched_scan_end(local);
2186
2187         list_for_each_entry(sdata, &local->interfaces, list)
2188                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2189
2190         /* Mark channel contexts as not being in the driver any more to avoid
2191          * removing them from the driver during the shutdown process...
2192          */
2193         mutex_lock(&local->chanctx_mtx);
2194         list_for_each_entry(ctx, &local->chanctx_list, list)
2195                 ctx->driver_present = false;
2196         mutex_unlock(&local->chanctx_mtx);
2197 }
2198
2199 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2200                                      struct ieee80211_sub_if_data *sdata)
2201 {
2202         struct ieee80211_chanctx_conf *conf;
2203         struct ieee80211_chanctx *ctx;
2204
2205         if (!local->use_chanctx)
2206                 return;
2207
2208         mutex_lock(&local->chanctx_mtx);
2209         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2210                                          lockdep_is_held(&local->chanctx_mtx));
2211         if (conf) {
2212                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2213                 drv_assign_vif_chanctx(local, sdata, ctx);
2214         }
2215         mutex_unlock(&local->chanctx_mtx);
2216 }
2217
2218 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2219 {
2220         struct ieee80211_local *local = sdata->local;
2221         struct sta_info *sta;
2222
2223         /* add STAs back */
2224         mutex_lock(&local->sta_mtx);
2225         list_for_each_entry(sta, &local->sta_list, list) {
2226                 enum ieee80211_sta_state state;
2227
2228                 if (!sta->uploaded || sta->sdata != sdata)
2229                         continue;
2230
2231                 for (state = IEEE80211_STA_NOTEXIST;
2232                      state < sta->sta_state; state++)
2233                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2234                                               state + 1));
2235         }
2236         mutex_unlock(&local->sta_mtx);
2237 }
2238
2239 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2240 {
2241         struct cfg80211_nan_func *func, **funcs;
2242         int res, id, i = 0;
2243
2244         res = drv_start_nan(sdata->local, sdata,
2245                             &sdata->u.nan.conf);
2246         if (WARN_ON(res))
2247                 return res;
2248
2249         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2250                         sizeof(*funcs),
2251                         GFP_KERNEL);
2252         if (!funcs)
2253                 return -ENOMEM;
2254
2255         /* Add all the functions:
2256          * This is a little bit ugly. We need to call a potentially sleeping
2257          * callback for each NAN function, so we can't hold the spinlock.
2258          */
2259         spin_lock_bh(&sdata->u.nan.func_lock);
2260
2261         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2262                 funcs[i++] = func;
2263
2264         spin_unlock_bh(&sdata->u.nan.func_lock);
2265
2266         for (i = 0; funcs[i]; i++) {
2267                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2268                 if (WARN_ON(res))
2269                         ieee80211_nan_func_terminated(&sdata->vif,
2270                                                       funcs[i]->instance_id,
2271                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2272                                                       GFP_KERNEL);
2273         }
2274
2275         kfree(funcs);
2276
2277         return 0;
2278 }
2279
2280 int ieee80211_reconfig(struct ieee80211_local *local)
2281 {
2282         struct ieee80211_hw *hw = &local->hw;
2283         struct ieee80211_sub_if_data *sdata;
2284         struct ieee80211_chanctx *ctx;
2285         struct sta_info *sta;
2286         int res, i;
2287         bool reconfig_due_to_wowlan = false;
2288         struct ieee80211_sub_if_data *sched_scan_sdata;
2289         struct cfg80211_sched_scan_request *sched_scan_req;
2290         bool sched_scan_stopped = false;
2291         bool suspended = local->suspended;
2292
2293         /* nothing to do if HW shouldn't run */
2294         if (!local->open_count)
2295                 goto wake_up;
2296
2297 #ifdef CONFIG_PM
2298         if (suspended)
2299                 local->resuming = true;
2300
2301         if (local->wowlan) {
2302                 /*
2303                  * In the wowlan case, both mac80211 and the device
2304                  * are functional when the resume op is called, so
2305                  * clear local->suspended so the device could operate
2306                  * normally (e.g. pass rx frames).
2307                  */
2308                 local->suspended = false;
2309                 res = drv_resume(local);
2310                 local->wowlan = false;
2311                 if (res < 0) {
2312                         local->resuming = false;
2313                         return res;
2314                 }
2315                 if (res == 0)
2316                         goto wake_up;
2317                 WARN_ON(res > 1);
2318                 /*
2319                  * res is 1, which means the driver requested
2320                  * to go through a regular reset on wakeup.
2321                  * restore local->suspended in this case.
2322                  */
2323                 reconfig_due_to_wowlan = true;
2324                 local->suspended = true;
2325         }
2326 #endif
2327
2328         /*
2329          * In case of hw_restart during suspend (without wowlan),
2330          * cancel restart work, as we are reconfiguring the device
2331          * anyway.
2332          * Note that restart_work is scheduled on a frozen workqueue,
2333          * so we can't deadlock in this case.
2334          */
2335         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2336                 cancel_work_sync(&local->restart_work);
2337
2338         local->started = false;
2339
2340         /*
2341          * Upon resume hardware can sometimes be goofy due to
2342          * various platform / driver / bus issues, so restarting
2343          * the device may at times not work immediately. Propagate
2344          * the error.
2345          */
2346         res = drv_start(local);
2347         if (res) {
2348                 if (suspended)
2349                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2350                 else
2351                         WARN(1, "Hardware became unavailable during restart.\n");
2352                 ieee80211_handle_reconfig_failure(local);
2353                 return res;
2354         }
2355
2356         /* setup fragmentation threshold */
2357         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2358
2359         /* setup RTS threshold */
2360         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2361
2362         /* reset coverage class */
2363         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2364
2365         ieee80211_led_radio(local, true);
2366         ieee80211_mod_tpt_led_trig(local,
2367                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2368
2369         /* add interfaces */
2370         sdata = rtnl_dereference(local->monitor_sdata);
2371         if (sdata) {
2372                 /* in HW restart it exists already */
2373                 WARN_ON(local->resuming);
2374                 res = drv_add_interface(local, sdata);
2375                 if (WARN_ON(res)) {
2376                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2377                         synchronize_net();
2378                         kfree(sdata);
2379                 }
2380         }
2381
2382         list_for_each_entry(sdata, &local->interfaces, list) {
2383                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2384                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2385                     ieee80211_sdata_running(sdata)) {
2386                         res = drv_add_interface(local, sdata);
2387                         if (WARN_ON(res))
2388                                 break;
2389                 }
2390         }
2391
2392         /* If adding any of the interfaces failed above, roll back and
2393          * report failure.
2394          */
2395         if (res) {
2396                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2397                                                      list)
2398                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2399                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2400                             ieee80211_sdata_running(sdata))
2401                                 drv_remove_interface(local, sdata);
2402                 ieee80211_handle_reconfig_failure(local);
2403                 return res;
2404         }
2405
2406         /* add channel contexts */
2407         if (local->use_chanctx) {
2408                 mutex_lock(&local->chanctx_mtx);
2409                 list_for_each_entry(ctx, &local->chanctx_list, list)
2410                         if (ctx->replace_state !=
2411                             IEEE80211_CHANCTX_REPLACES_OTHER)
2412                                 WARN_ON(drv_add_chanctx(local, ctx));
2413                 mutex_unlock(&local->chanctx_mtx);
2414
2415                 sdata = rtnl_dereference(local->monitor_sdata);
2416                 if (sdata && ieee80211_sdata_running(sdata))
2417                         ieee80211_assign_chanctx(local, sdata);
2418         }
2419
2420         /* reconfigure hardware */
2421         ieee80211_hw_config(local, ~0);
2422
2423         ieee80211_configure_filter(local);
2424
2425         /* Finally also reconfigure all the BSS information */
2426         list_for_each_entry(sdata, &local->interfaces, list) {
2427                 u32 changed;
2428
2429                 if (!ieee80211_sdata_running(sdata))
2430                         continue;
2431
2432                 ieee80211_assign_chanctx(local, sdata);
2433
2434                 switch (sdata->vif.type) {
2435                 case NL80211_IFTYPE_AP_VLAN:
2436                 case NL80211_IFTYPE_MONITOR:
2437                         break;
2438                 case NL80211_IFTYPE_ADHOC:
2439                         if (sdata->vif.bss_conf.ibss_joined)
2440                                 WARN_ON(drv_join_ibss(local, sdata));
2441                         fallthrough;
2442                 default:
2443                         ieee80211_reconfig_stations(sdata);
2444                         fallthrough;
2445                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2446                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2447                                 drv_conf_tx(local, sdata, i,
2448                                             &sdata->tx_conf[i]);
2449                         break;
2450                 }
2451
2452                 /* common change flags for all interface types */
2453                 changed = BSS_CHANGED_ERP_CTS_PROT |
2454                           BSS_CHANGED_ERP_PREAMBLE |
2455                           BSS_CHANGED_ERP_SLOT |
2456                           BSS_CHANGED_HT |
2457                           BSS_CHANGED_BASIC_RATES |
2458                           BSS_CHANGED_BEACON_INT |
2459                           BSS_CHANGED_BSSID |
2460                           BSS_CHANGED_CQM |
2461                           BSS_CHANGED_QOS |
2462                           BSS_CHANGED_IDLE |
2463                           BSS_CHANGED_TXPOWER |
2464                           BSS_CHANGED_MCAST_RATE;
2465
2466                 if (sdata->vif.mu_mimo_owner)
2467                         changed |= BSS_CHANGED_MU_GROUPS;
2468
2469                 switch (sdata->vif.type) {
2470                 case NL80211_IFTYPE_STATION:
2471                         changed |= BSS_CHANGED_ASSOC |
2472                                    BSS_CHANGED_ARP_FILTER |
2473                                    BSS_CHANGED_PS;
2474
2475                         /* Re-send beacon info report to the driver */
2476                         if (sdata->u.mgd.have_beacon)
2477                                 changed |= BSS_CHANGED_BEACON_INFO;
2478
2479                         if (sdata->vif.bss_conf.max_idle_period ||
2480                             sdata->vif.bss_conf.protected_keep_alive)
2481                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2482
2483                         sdata_lock(sdata);
2484                         ieee80211_bss_info_change_notify(sdata, changed);
2485                         sdata_unlock(sdata);
2486                         break;
2487                 case NL80211_IFTYPE_OCB:
2488                         changed |= BSS_CHANGED_OCB;
2489                         ieee80211_bss_info_change_notify(sdata, changed);
2490                         break;
2491                 case NL80211_IFTYPE_ADHOC:
2492                         changed |= BSS_CHANGED_IBSS;
2493                         fallthrough;
2494                 case NL80211_IFTYPE_AP:
2495                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2496
2497                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2498                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2499                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2500                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2501
2502                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2503                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2504
2505                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2506                                         drv_start_ap(local, sdata);
2507                         }
2508                         fallthrough;
2509                 case NL80211_IFTYPE_MESH_POINT:
2510                         if (sdata->vif.bss_conf.enable_beacon) {
2511                                 changed |= BSS_CHANGED_BEACON |
2512                                            BSS_CHANGED_BEACON_ENABLED;
2513                                 ieee80211_bss_info_change_notify(sdata, changed);
2514                         }
2515                         break;
2516                 case NL80211_IFTYPE_NAN:
2517                         res = ieee80211_reconfig_nan(sdata);
2518                         if (res < 0) {
2519                                 ieee80211_handle_reconfig_failure(local);
2520                                 return res;
2521                         }
2522                         break;
2523                 case NL80211_IFTYPE_AP_VLAN:
2524                 case NL80211_IFTYPE_MONITOR:
2525                 case NL80211_IFTYPE_P2P_DEVICE:
2526                         /* nothing to do */
2527                         break;
2528                 case NL80211_IFTYPE_UNSPECIFIED:
2529                 case NUM_NL80211_IFTYPES:
2530                 case NL80211_IFTYPE_P2P_CLIENT:
2531                 case NL80211_IFTYPE_P2P_GO:
2532                 case NL80211_IFTYPE_WDS:
2533                         WARN_ON(1);
2534                         break;
2535                 }
2536         }
2537
2538         ieee80211_recalc_ps(local);
2539
2540         /*
2541          * The sta might be in psm against the ap (e.g. because
2542          * this was the state before a hw restart), so we
2543          * explicitly send a null packet in order to make sure
2544          * it'll sync against the ap (and get out of psm).
2545          */
2546         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2547                 list_for_each_entry(sdata, &local->interfaces, list) {
2548                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2549                                 continue;
2550                         if (!sdata->u.mgd.associated)
2551                                 continue;
2552
2553                         ieee80211_send_nullfunc(local, sdata, false);
2554                 }
2555         }
2556
2557         /* APs are now beaconing, add back stations */
2558         mutex_lock(&local->sta_mtx);
2559         list_for_each_entry(sta, &local->sta_list, list) {
2560                 enum ieee80211_sta_state state;
2561
2562                 if (!sta->uploaded)
2563                         continue;
2564
2565                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2566                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2567                         continue;
2568
2569                 for (state = IEEE80211_STA_NOTEXIST;
2570                      state < sta->sta_state; state++)
2571                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2572                                               state + 1));
2573         }
2574         mutex_unlock(&local->sta_mtx);
2575
2576         /* add back keys */
2577         list_for_each_entry(sdata, &local->interfaces, list)
2578                 ieee80211_reenable_keys(sdata);
2579
2580         /* Reconfigure sched scan if it was interrupted by FW restart */
2581         mutex_lock(&local->mtx);
2582         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2583                                                 lockdep_is_held(&local->mtx));
2584         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2585                                                 lockdep_is_held(&local->mtx));
2586         if (sched_scan_sdata && sched_scan_req)
2587                 /*
2588                  * Sched scan stopped, but we don't want to report it. Instead,
2589                  * we're trying to reschedule. However, if more than one scan
2590                  * plan was set, we cannot reschedule since we don't know which
2591                  * scan plan was currently running (and some scan plans may have
2592                  * already finished).
2593                  */
2594                 if (sched_scan_req->n_scan_plans > 1 ||
2595                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2596                                                          sched_scan_req)) {
2597                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2598                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2599                         sched_scan_stopped = true;
2600                 }
2601         mutex_unlock(&local->mtx);
2602
2603         if (sched_scan_stopped)
2604                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2605
2606  wake_up:
2607
2608         if (local->monitors == local->open_count && local->monitors > 0)
2609                 ieee80211_add_virtual_monitor(local);
2610
2611         /*
2612          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2613          * sessions can be established after a resume.
2614          *
2615          * Also tear down aggregation sessions since reconfiguring
2616          * them in a hardware restart scenario is not easily done
2617          * right now, and the hardware will have lost information
2618          * about the sessions, but we and the AP still think they
2619          * are active. This is really a workaround though.
2620          */
2621         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2622                 mutex_lock(&local->sta_mtx);
2623
2624                 list_for_each_entry(sta, &local->sta_list, list) {
2625                         if (!local->resuming)
2626                                 ieee80211_sta_tear_down_BA_sessions(
2627                                                 sta, AGG_STOP_LOCAL_REQUEST);
2628                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2629                 }
2630
2631                 mutex_unlock(&local->sta_mtx);
2632         }
2633
2634         if (local->in_reconfig) {
2635                 local->in_reconfig = false;
2636                 barrier();
2637
2638                 /* Restart deferred ROCs */
2639                 mutex_lock(&local->mtx);
2640                 ieee80211_start_next_roc(local);
2641                 mutex_unlock(&local->mtx);
2642
2643                 /* Requeue all works */
2644                 list_for_each_entry(sdata, &local->interfaces, list)
2645                         ieee80211_queue_work(&local->hw, &sdata->work);
2646         }
2647
2648         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2649                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2650                                         false);
2651
2652         /*
2653          * If this is for hw restart things are still running.
2654          * We may want to change that later, however.
2655          */
2656         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2657                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2658
2659         if (!suspended)
2660                 return 0;
2661
2662 #ifdef CONFIG_PM
2663         /* first set suspended false, then resuming */
2664         local->suspended = false;
2665         mb();
2666         local->resuming = false;
2667
2668         ieee80211_flush_completed_scan(local, false);
2669
2670         if (local->open_count && !reconfig_due_to_wowlan)
2671                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2672
2673         list_for_each_entry(sdata, &local->interfaces, list) {
2674                 if (!ieee80211_sdata_running(sdata))
2675                         continue;
2676                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2677                         ieee80211_sta_restart(sdata);
2678         }
2679
2680         mod_timer(&local->sta_cleanup, jiffies + 1);
2681 #else
2682         WARN_ON(1);
2683 #endif
2684
2685         return 0;
2686 }
2687
2688 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2689 {
2690         struct ieee80211_sub_if_data *sdata;
2691         struct ieee80211_local *local;
2692         struct ieee80211_key *key;
2693
2694         if (WARN_ON(!vif))
2695                 return;
2696
2697         sdata = vif_to_sdata(vif);
2698         local = sdata->local;
2699
2700         if (WARN_ON(!local->resuming))
2701                 return;
2702
2703         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2704                 return;
2705
2706         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2707
2708         mutex_lock(&local->key_mtx);
2709         list_for_each_entry(key, &sdata->key_list, list)
2710                 key->flags |= KEY_FLAG_TAINTED;
2711         mutex_unlock(&local->key_mtx);
2712 }
2713 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2714
2715 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2716 {
2717         struct ieee80211_local *local = sdata->local;
2718         struct ieee80211_chanctx_conf *chanctx_conf;
2719         struct ieee80211_chanctx *chanctx;
2720
2721         mutex_lock(&local->chanctx_mtx);
2722
2723         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2724                                         lockdep_is_held(&local->chanctx_mtx));
2725
2726         /*
2727          * This function can be called from a work, thus it may be possible
2728          * that the chanctx_conf is removed (due to a disconnection, for
2729          * example).
2730          * So nothing should be done in such case.
2731          */
2732         if (!chanctx_conf)
2733                 goto unlock;
2734
2735         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2736         ieee80211_recalc_smps_chanctx(local, chanctx);
2737  unlock:
2738         mutex_unlock(&local->chanctx_mtx);
2739 }
2740
2741 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2742 {
2743         struct ieee80211_local *local = sdata->local;
2744         struct ieee80211_chanctx_conf *chanctx_conf;
2745         struct ieee80211_chanctx *chanctx;
2746
2747         mutex_lock(&local->chanctx_mtx);
2748
2749         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2750                                         lockdep_is_held(&local->chanctx_mtx));
2751
2752         if (WARN_ON_ONCE(!chanctx_conf))
2753                 goto unlock;
2754
2755         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2756         ieee80211_recalc_chanctx_min_def(local, chanctx);
2757  unlock:
2758         mutex_unlock(&local->chanctx_mtx);
2759 }
2760
2761 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2762 {
2763         size_t pos = offset;
2764
2765         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2766                 pos += 2 + ies[pos + 1];
2767
2768         return pos;
2769 }
2770
2771 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2772                                             int rssi_min_thold,
2773                                             int rssi_max_thold)
2774 {
2775         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2776
2777         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2778                 return;
2779
2780         /*
2781          * Scale up threshold values before storing it, as the RSSI averaging
2782          * algorithm uses a scaled up value as well. Change this scaling
2783          * factor if the RSSI averaging algorithm changes.
2784          */
2785         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2786         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2787 }
2788
2789 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2790                                     int rssi_min_thold,
2791                                     int rssi_max_thold)
2792 {
2793         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2794
2795         WARN_ON(rssi_min_thold == rssi_max_thold ||
2796                 rssi_min_thold > rssi_max_thold);
2797
2798         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2799                                        rssi_max_thold);
2800 }
2801 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2802
2803 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2804 {
2805         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2806
2807         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2808 }
2809 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2810
2811 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2812                               u16 cap)
2813 {
2814         __le16 tmp;
2815
2816         *pos++ = WLAN_EID_HT_CAPABILITY;
2817         *pos++ = sizeof(struct ieee80211_ht_cap);
2818         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2819
2820         /* capability flags */
2821         tmp = cpu_to_le16(cap);
2822         memcpy(pos, &tmp, sizeof(u16));
2823         pos += sizeof(u16);
2824
2825         /* AMPDU parameters */
2826         *pos++ = ht_cap->ampdu_factor |
2827                  (ht_cap->ampdu_density <<
2828                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2829
2830         /* MCS set */
2831         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2832         pos += sizeof(ht_cap->mcs);
2833
2834         /* extended capabilities */
2835         pos += sizeof(__le16);
2836
2837         /* BF capabilities */
2838         pos += sizeof(__le32);
2839
2840         /* antenna selection */
2841         pos += sizeof(u8);
2842
2843         return pos;
2844 }
2845
2846 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2847                                u32 cap)
2848 {
2849         __le32 tmp;
2850
2851         *pos++ = WLAN_EID_VHT_CAPABILITY;
2852         *pos++ = sizeof(struct ieee80211_vht_cap);
2853         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2854
2855         /* capability flags */
2856         tmp = cpu_to_le32(cap);
2857         memcpy(pos, &tmp, sizeof(u32));
2858         pos += sizeof(u32);
2859
2860         /* VHT MCS set */
2861         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2862         pos += sizeof(vht_cap->vht_mcs);
2863
2864         return pos;
2865 }
2866
2867 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2868 {
2869         const struct ieee80211_sta_he_cap *he_cap;
2870         struct ieee80211_supported_band *sband;
2871         u8 n;
2872
2873         sband = ieee80211_get_sband(sdata);
2874         if (!sband)
2875                 return 0;
2876
2877         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2878         if (!he_cap)
2879                 return 0;
2880
2881         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2882         return 2 + 1 +
2883                sizeof(he_cap->he_cap_elem) + n +
2884                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2885                                      he_cap->he_cap_elem.phy_cap_info);
2886 }
2887
2888 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2889                               const struct ieee80211_sta_he_cap *he_cap,
2890                               u8 *end)
2891 {
2892         u8 n;
2893         u8 ie_len;
2894         u8 *orig_pos = pos;
2895
2896         /* Make sure we have place for the IE */
2897         /*
2898          * TODO: the 1 added is because this temporarily is under the EXTENSION
2899          * IE. Get rid of it when it moves.
2900          */
2901         if (!he_cap)
2902                 return orig_pos;
2903
2904         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2905         ie_len = 2 + 1 +
2906                  sizeof(he_cap->he_cap_elem) + n +
2907                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2908                                        he_cap->he_cap_elem.phy_cap_info);
2909
2910         if ((end - pos) < ie_len)
2911                 return orig_pos;
2912
2913         *pos++ = WLAN_EID_EXTENSION;
2914         pos++; /* We'll set the size later below */
2915         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2916
2917         /* Fixed data */
2918         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2919         pos += sizeof(he_cap->he_cap_elem);
2920
2921         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2922         pos += n;
2923
2924         /* Check if PPE Threshold should be present */
2925         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2926              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2927                 goto end;
2928
2929         /*
2930          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2931          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2932          */
2933         n = hweight8(he_cap->ppe_thres[0] &
2934                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2935         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2936                    IEEE80211_PPE_THRES_NSS_POS));
2937
2938         /*
2939          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2940          * total size.
2941          */
2942         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2943         n = DIV_ROUND_UP(n, 8);
2944
2945         /* Copy PPE Thresholds */
2946         memcpy(pos, &he_cap->ppe_thres, n);
2947         pos += n;
2948
2949 end:
2950         orig_pos[1] = (pos - orig_pos) - 2;
2951         return pos;
2952 }
2953
2954 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2955                                     struct sk_buff *skb)
2956 {
2957         struct ieee80211_supported_band *sband;
2958         const struct ieee80211_sband_iftype_data *iftd;
2959         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2960         u8 *pos;
2961         u16 cap;
2962
2963         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2964                                           BIT(NL80211_BAND_6GHZ),
2965                                           IEEE80211_CHAN_NO_HE))
2966                 return;
2967
2968         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2969
2970         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2971         if (!iftd)
2972                 return;
2973
2974         /* Check for device HE 6 GHz capability before adding element */
2975         if (!iftd->he_6ghz_capa.capa)
2976                 return;
2977
2978         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2979         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2980
2981         switch (sdata->smps_mode) {
2982         case IEEE80211_SMPS_AUTOMATIC:
2983         case IEEE80211_SMPS_NUM_MODES:
2984                 WARN_ON(1);
2985                 fallthrough;
2986         case IEEE80211_SMPS_OFF:
2987                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2988                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2989                 break;
2990         case IEEE80211_SMPS_STATIC:
2991                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2992                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2993                 break;
2994         case IEEE80211_SMPS_DYNAMIC:
2995                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2996                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2997                 break;
2998         }
2999
3000         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3001         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3002                                     pos + 2 + 1 + sizeof(cap));
3003 }
3004
3005 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3006                                const struct cfg80211_chan_def *chandef,
3007                                u16 prot_mode, bool rifs_mode)
3008 {
3009         struct ieee80211_ht_operation *ht_oper;
3010         /* Build HT Information */
3011         *pos++ = WLAN_EID_HT_OPERATION;
3012         *pos++ = sizeof(struct ieee80211_ht_operation);
3013         ht_oper = (struct ieee80211_ht_operation *)pos;
3014         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3015                                         chandef->chan->center_freq);
3016         switch (chandef->width) {
3017         case NL80211_CHAN_WIDTH_160:
3018         case NL80211_CHAN_WIDTH_80P80:
3019         case NL80211_CHAN_WIDTH_80:
3020         case NL80211_CHAN_WIDTH_40:
3021                 if (chandef->center_freq1 > chandef->chan->center_freq)
3022                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3023                 else
3024                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3025                 break;
3026         default:
3027                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3028                 break;
3029         }
3030         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3031             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3032             chandef->width != NL80211_CHAN_WIDTH_20)
3033                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3034
3035         if (rifs_mode)
3036                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3037
3038         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3039         ht_oper->stbc_param = 0x0000;
3040
3041         /* It seems that Basic MCS set and Supported MCS set
3042            are identical for the first 10 bytes */
3043         memset(&ht_oper->basic_set, 0, 16);
3044         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3045
3046         return pos + sizeof(struct ieee80211_ht_operation);
3047 }
3048
3049 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3050                                    const struct cfg80211_chan_def *chandef)
3051 {
3052         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3053         *pos++ = 3;                                     /* IE length */
3054         /* New channel width */
3055         switch (chandef->width) {
3056         case NL80211_CHAN_WIDTH_80:
3057                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3058                 break;
3059         case NL80211_CHAN_WIDTH_160:
3060                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3061                 break;
3062         case NL80211_CHAN_WIDTH_80P80:
3063                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3064                 break;
3065         default:
3066                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3067         }
3068
3069         /* new center frequency segment 0 */
3070         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3071         /* new center frequency segment 1 */
3072         if (chandef->center_freq2)
3073                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3074         else
3075                 *pos++ = 0;
3076 }
3077
3078 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3079                                 const struct cfg80211_chan_def *chandef)
3080 {
3081         struct ieee80211_vht_operation *vht_oper;
3082
3083         *pos++ = WLAN_EID_VHT_OPERATION;
3084         *pos++ = sizeof(struct ieee80211_vht_operation);
3085         vht_oper = (struct ieee80211_vht_operation *)pos;
3086         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3087                                                         chandef->center_freq1);
3088         if (chandef->center_freq2)
3089                 vht_oper->center_freq_seg1_idx =
3090                         ieee80211_frequency_to_channel(chandef->center_freq2);
3091         else
3092                 vht_oper->center_freq_seg1_idx = 0x00;
3093
3094         switch (chandef->width) {
3095         case NL80211_CHAN_WIDTH_160:
3096                 /*
3097                  * Convert 160 MHz channel width to new style as interop
3098                  * workaround.
3099                  */
3100                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3101                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3102                 if (chandef->chan->center_freq < chandef->center_freq1)
3103                         vht_oper->center_freq_seg0_idx -= 8;
3104                 else
3105                         vht_oper->center_freq_seg0_idx += 8;
3106                 break;
3107         case NL80211_CHAN_WIDTH_80P80:
3108                 /*
3109                  * Convert 80+80 MHz channel width to new style as interop
3110                  * workaround.
3111                  */
3112                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3113                 break;
3114         case NL80211_CHAN_WIDTH_80:
3115                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3116                 break;
3117         default:
3118                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3119                 break;
3120         }
3121
3122         /* don't require special VHT peer rates */
3123         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3124
3125         return pos + sizeof(struct ieee80211_vht_operation);
3126 }
3127
3128 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3129 {
3130         struct ieee80211_he_operation *he_oper;
3131         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3132         u32 he_oper_params;
3133         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3134
3135         if (chandef->chan->band == NL80211_BAND_6GHZ)
3136                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3137
3138         *pos++ = WLAN_EID_EXTENSION;
3139         *pos++ = ie_len;
3140         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3141
3142         he_oper_params = 0;
3143         he_oper_params |= u32_encode_bits(1023, /* disabled */
3144                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3145         he_oper_params |= u32_encode_bits(1,
3146                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3147         he_oper_params |= u32_encode_bits(1,
3148                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3149         if (chandef->chan->band == NL80211_BAND_6GHZ)
3150                 he_oper_params |= u32_encode_bits(1,
3151                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3152
3153         he_oper = (struct ieee80211_he_operation *)pos;
3154         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3155
3156         /* don't require special HE peer rates */
3157         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3158         pos += sizeof(struct ieee80211_he_operation);
3159
3160         if (chandef->chan->band != NL80211_BAND_6GHZ)
3161                 goto out;
3162
3163         /* TODO add VHT operational */
3164         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3165         he_6ghz_op->minrate = 6; /* 6 Mbps */
3166         he_6ghz_op->primary =
3167                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3168         he_6ghz_op->ccfs0 =
3169                 ieee80211_frequency_to_channel(chandef->center_freq1);
3170         if (chandef->center_freq2)
3171                 he_6ghz_op->ccfs1 =
3172                         ieee80211_frequency_to_channel(chandef->center_freq2);
3173         else
3174                 he_6ghz_op->ccfs1 = 0;
3175
3176         switch (chandef->width) {
3177         case NL80211_CHAN_WIDTH_160:
3178                 /* Convert 160 MHz channel width to new style as interop
3179                  * workaround.
3180                  */
3181                 he_6ghz_op->control =
3182                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3183                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3184                 if (chandef->chan->center_freq < chandef->center_freq1)
3185                         he_6ghz_op->ccfs0 -= 8;
3186                 else
3187                         he_6ghz_op->ccfs0 += 8;
3188                 fallthrough;
3189         case NL80211_CHAN_WIDTH_80P80:
3190                 he_6ghz_op->control =
3191                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3192                 break;
3193         case NL80211_CHAN_WIDTH_80:
3194                 he_6ghz_op->control =
3195                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3196                 break;
3197         case NL80211_CHAN_WIDTH_40:
3198                 he_6ghz_op->control =
3199                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3200                 break;
3201         default:
3202                 he_6ghz_op->control =
3203                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3204                 break;
3205         }
3206
3207         pos += sizeof(struct ieee80211_he_6ghz_oper);
3208
3209 out:
3210         return pos;
3211 }
3212
3213 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3214                                struct cfg80211_chan_def *chandef)
3215 {
3216         enum nl80211_channel_type channel_type;
3217
3218         if (!ht_oper)
3219                 return false;
3220
3221         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3222         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3223                 channel_type = NL80211_CHAN_HT20;
3224                 break;
3225         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3226                 channel_type = NL80211_CHAN_HT40PLUS;
3227                 break;
3228         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3229                 channel_type = NL80211_CHAN_HT40MINUS;
3230                 break;
3231         default:
3232                 channel_type = NL80211_CHAN_NO_HT;
3233                 return false;
3234         }
3235
3236         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3237         return true;
3238 }
3239
3240 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3241                                 const struct ieee80211_vht_operation *oper,
3242                                 const struct ieee80211_ht_operation *htop,
3243                                 struct cfg80211_chan_def *chandef)
3244 {
3245         struct cfg80211_chan_def new = *chandef;
3246         int cf0, cf1;
3247         int ccfs0, ccfs1, ccfs2;
3248         int ccf0, ccf1;
3249         u32 vht_cap;
3250         bool support_80_80 = false;
3251         bool support_160 = false;
3252         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3253                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3254         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3255                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3256
3257         if (!oper || !htop)
3258                 return false;
3259
3260         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3261         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3262                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3263         support_80_80 = ((vht_cap &
3264                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3265                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3266                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3267                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3268                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3269         ccfs0 = oper->center_freq_seg0_idx;
3270         ccfs1 = oper->center_freq_seg1_idx;
3271         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3272                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3273                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3274
3275         ccf0 = ccfs0;
3276
3277         /* if not supported, parse as though we didn't understand it */
3278         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3279                 ext_nss_bw_supp = 0;
3280
3281         /*
3282          * Cf. IEEE 802.11 Table 9-250
3283          *
3284          * We really just consider that because it's inefficient to connect
3285          * at a higher bandwidth than we'll actually be able to use.
3286          */
3287         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3288         default:
3289         case 0x00:
3290                 ccf1 = 0;
3291                 support_160 = false;
3292                 support_80_80 = false;
3293                 break;
3294         case 0x01:
3295                 support_80_80 = false;
3296                 fallthrough;
3297         case 0x02:
3298         case 0x03:
3299                 ccf1 = ccfs2;
3300                 break;
3301         case 0x10:
3302                 ccf1 = ccfs1;
3303                 break;
3304         case 0x11:
3305         case 0x12:
3306                 if (!ccfs1)
3307                         ccf1 = ccfs2;
3308                 else
3309                         ccf1 = ccfs1;
3310                 break;
3311         case 0x13:
3312         case 0x20:
3313         case 0x23:
3314                 ccf1 = ccfs1;
3315                 break;
3316         }
3317
3318         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3319         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3320
3321         switch (oper->chan_width) {
3322         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3323                 /* just use HT information directly */
3324                 break;
3325         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3326                 new.width = NL80211_CHAN_WIDTH_80;
3327                 new.center_freq1 = cf0;
3328                 /* If needed, adjust based on the newer interop workaround. */
3329                 if (ccf1) {
3330                         unsigned int diff;
3331
3332                         diff = abs(ccf1 - ccf0);
3333                         if ((diff == 8) && support_160) {
3334                                 new.width = NL80211_CHAN_WIDTH_160;
3335                                 new.center_freq1 = cf1;
3336                         } else if ((diff > 8) && support_80_80) {
3337                                 new.width = NL80211_CHAN_WIDTH_80P80;
3338                                 new.center_freq2 = cf1;
3339                         }
3340                 }
3341                 break;
3342         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3343                 /* deprecated encoding */
3344                 new.width = NL80211_CHAN_WIDTH_160;
3345                 new.center_freq1 = cf0;
3346                 break;
3347         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3348                 /* deprecated encoding */
3349                 new.width = NL80211_CHAN_WIDTH_80P80;
3350                 new.center_freq1 = cf0;
3351                 new.center_freq2 = cf1;
3352                 break;
3353         default:
3354                 return false;
3355         }
3356
3357         if (!cfg80211_chandef_valid(&new))
3358                 return false;
3359
3360         *chandef = new;
3361         return true;
3362 }
3363
3364 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3365                                     const struct ieee80211_he_operation *he_oper,
3366                                     struct cfg80211_chan_def *chandef)
3367 {
3368         struct ieee80211_local *local = sdata->local;
3369         struct ieee80211_supported_band *sband;
3370         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3371         const struct ieee80211_sta_he_cap *he_cap;
3372         struct cfg80211_chan_def he_chandef = *chandef;
3373         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3374         bool support_80_80, support_160;
3375         u8 he_phy_cap;
3376         u32 freq;
3377
3378         if (chandef->chan->band != NL80211_BAND_6GHZ)
3379                 return true;
3380
3381         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3382
3383         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3384         if (!he_cap) {
3385                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3386                 return false;
3387         }
3388
3389         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3390         support_160 =
3391                 he_phy_cap &
3392                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3393         support_80_80 =
3394                 he_phy_cap &
3395                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3396
3397         if (!he_oper) {
3398                 sdata_info(sdata,
3399                            "HE is not advertised on (on %d MHz), expect issues\n",
3400                            chandef->chan->center_freq);
3401                 return false;
3402         }
3403
3404         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3405
3406         if (!he_6ghz_oper) {
3407                 sdata_info(sdata,
3408                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3409                            chandef->chan->center_freq);
3410                 return false;
3411         }
3412
3413         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3414                                               NL80211_BAND_6GHZ);
3415         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3416
3417         switch (u8_get_bits(he_6ghz_oper->control,
3418                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3419         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3420                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3421                 break;
3422         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3423                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3424                 break;
3425         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3426                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3427                 break;
3428         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3429                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3430                 if (!he_6ghz_oper->ccfs1)
3431                         break;
3432                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3433                         if (support_160)
3434                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3435                 } else {
3436                         if (support_80_80)
3437                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3438                 }
3439                 break;
3440         }
3441
3442         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3443                 he_chandef.center_freq1 =
3444                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3445                                                        NL80211_BAND_6GHZ);
3446         } else {
3447                 he_chandef.center_freq1 =
3448                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3449                                                        NL80211_BAND_6GHZ);
3450                 if (support_80_80 || support_160)
3451                         he_chandef.center_freq2 =
3452                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3453                                                                NL80211_BAND_6GHZ);
3454         }
3455
3456         if (!cfg80211_chandef_valid(&he_chandef)) {
3457                 sdata_info(sdata,
3458                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3459                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3460                            he_chandef.width,
3461                            he_chandef.center_freq1,
3462                            he_chandef.center_freq2);
3463                 return false;
3464         }
3465
3466         *chandef = he_chandef;
3467
3468         return true;
3469 }
3470
3471 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3472                                 struct cfg80211_chan_def *chandef)
3473 {
3474         u32 oper_freq;
3475
3476         if (!oper)
3477                 return false;
3478
3479         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3480         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3481                 chandef->width = NL80211_CHAN_WIDTH_1;
3482                 break;
3483         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3484                 chandef->width = NL80211_CHAN_WIDTH_2;
3485                 break;
3486         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3487                 chandef->width = NL80211_CHAN_WIDTH_4;
3488                 break;
3489         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3490                 chandef->width = NL80211_CHAN_WIDTH_8;
3491                 break;
3492         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3493                 chandef->width = NL80211_CHAN_WIDTH_16;
3494                 break;
3495         default:
3496                 return false;
3497         }
3498
3499         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3500                                                   NL80211_BAND_S1GHZ);
3501         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3502         chandef->freq1_offset = oper_freq % 1000;
3503
3504         return true;
3505 }
3506
3507 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3508                              const struct ieee80211_supported_band *sband,
3509                              const u8 *srates, int srates_len, u32 *rates)
3510 {
3511         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3512         int shift = ieee80211_chandef_get_shift(chandef);
3513         struct ieee80211_rate *br;
3514         int brate, rate, i, j, count = 0;
3515
3516         *rates = 0;
3517
3518         for (i = 0; i < srates_len; i++) {
3519                 rate = srates[i] & 0x7f;
3520
3521                 for (j = 0; j < sband->n_bitrates; j++) {
3522                         br = &sband->bitrates[j];
3523                         if ((rate_flags & br->flags) != rate_flags)
3524                                 continue;
3525
3526                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3527                         if (brate == rate) {
3528                                 *rates |= BIT(j);
3529                                 count++;
3530                                 break;
3531                         }
3532                 }
3533         }
3534         return count;
3535 }
3536
3537 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3538                             struct sk_buff *skb, bool need_basic,
3539                             enum nl80211_band band)
3540 {
3541         struct ieee80211_local *local = sdata->local;
3542         struct ieee80211_supported_band *sband;
3543         int rate, shift;
3544         u8 i, rates, *pos;
3545         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3546         u32 rate_flags;
3547
3548         shift = ieee80211_vif_get_shift(&sdata->vif);
3549         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3550         sband = local->hw.wiphy->bands[band];
3551         rates = 0;
3552         for (i = 0; i < sband->n_bitrates; i++) {
3553                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3554                         continue;
3555                 rates++;
3556         }
3557         if (rates > 8)
3558                 rates = 8;
3559
3560         if (skb_tailroom(skb) < rates + 2)
3561                 return -ENOMEM;
3562
3563         pos = skb_put(skb, rates + 2);
3564         *pos++ = WLAN_EID_SUPP_RATES;
3565         *pos++ = rates;
3566         for (i = 0; i < rates; i++) {
3567                 u8 basic = 0;
3568                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3569                         continue;
3570
3571                 if (need_basic && basic_rates & BIT(i))
3572                         basic = 0x80;
3573                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3574                                     5 * (1 << shift));
3575                 *pos++ = basic | (u8) rate;
3576         }
3577
3578         return 0;
3579 }
3580
3581 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3582                                 struct sk_buff *skb, bool need_basic,
3583                                 enum nl80211_band band)
3584 {
3585         struct ieee80211_local *local = sdata->local;
3586         struct ieee80211_supported_band *sband;
3587         int rate, shift;
3588         u8 i, exrates, *pos;
3589         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3590         u32 rate_flags;
3591
3592         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3593         shift = ieee80211_vif_get_shift(&sdata->vif);
3594
3595         sband = local->hw.wiphy->bands[band];
3596         exrates = 0;
3597         for (i = 0; i < sband->n_bitrates; i++) {
3598                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3599                         continue;
3600                 exrates++;
3601         }
3602
3603         if (exrates > 8)
3604                 exrates -= 8;
3605         else
3606                 exrates = 0;
3607
3608         if (skb_tailroom(skb) < exrates + 2)
3609                 return -ENOMEM;
3610
3611         if (exrates) {
3612                 pos = skb_put(skb, exrates + 2);
3613                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3614                 *pos++ = exrates;
3615                 for (i = 8; i < sband->n_bitrates; i++) {
3616                         u8 basic = 0;
3617                         if ((rate_flags & sband->bitrates[i].flags)
3618                             != rate_flags)
3619                                 continue;
3620                         if (need_basic && basic_rates & BIT(i))
3621                                 basic = 0x80;
3622                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3623                                             5 * (1 << shift));
3624                         *pos++ = basic | (u8) rate;
3625                 }
3626         }
3627         return 0;
3628 }
3629
3630 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3631 {
3632         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3633         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3634
3635         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3636                 /* non-managed type inferfaces */
3637                 return 0;
3638         }
3639         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3640 }
3641 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3642
3643 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3644 {
3645         if (!mcs)
3646                 return 1;
3647
3648         /* TODO: consider rx_highest */
3649
3650         if (mcs->rx_mask[3])
3651                 return 4;
3652         if (mcs->rx_mask[2])
3653                 return 3;
3654         if (mcs->rx_mask[1])
3655                 return 2;
3656         return 1;
3657 }
3658
3659 /**
3660  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3661  * @local: mac80211 hw info struct
3662  * @status: RX status
3663  * @mpdu_len: total MPDU length (including FCS)
3664  * @mpdu_offset: offset into MPDU to calculate timestamp at
3665  *
3666  * This function calculates the RX timestamp at the given MPDU offset, taking
3667  * into account what the RX timestamp was. An offset of 0 will just normalize
3668  * the timestamp to TSF at beginning of MPDU reception.
3669  */
3670 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3671                                      struct ieee80211_rx_status *status,
3672                                      unsigned int mpdu_len,
3673                                      unsigned int mpdu_offset)
3674 {
3675         u64 ts = status->mactime;
3676         struct rate_info ri;
3677         u16 rate;
3678         u8 n_ltf;
3679
3680         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3681                 return 0;
3682
3683         memset(&ri, 0, sizeof(ri));
3684
3685         ri.bw = status->bw;
3686
3687         /* Fill cfg80211 rate info */
3688         switch (status->encoding) {
3689         case RX_ENC_HE:
3690                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3691                 ri.mcs = status->rate_idx;
3692                 ri.nss = status->nss;
3693                 ri.he_ru_alloc = status->he_ru;
3694                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3695                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3696
3697                 /*
3698                  * See P802.11ax_D6.0, section 27.3.4 for
3699                  * VHT PPDU format.
3700                  */
3701                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3702                         mpdu_offset += 2;
3703                         ts += 36;
3704
3705                         /*
3706                          * TODO:
3707                          * For HE MU PPDU, add the HE-SIG-B.
3708                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3709                          * For HE TB PPDU, add 4us for the HE-STF.
3710                          * Add the HE-LTF durations - variable.
3711                          */
3712                 }
3713
3714                 break;
3715         case RX_ENC_HT:
3716                 ri.mcs = status->rate_idx;
3717                 ri.flags |= RATE_INFO_FLAGS_MCS;
3718                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3719                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3720
3721                 /*
3722                  * See P802.11REVmd_D3.0, section 19.3.2 for
3723                  * HT PPDU format.
3724                  */
3725                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3726                         mpdu_offset += 2;
3727                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3728                                 ts += 24;
3729                         else
3730                                 ts += 32;
3731
3732                         /*
3733                          * Add Data HT-LTFs per streams
3734                          * TODO: add Extension HT-LTFs, 4us per LTF
3735                          */
3736                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3737                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3738                         ts += n_ltf * 4;
3739                 }
3740
3741                 break;
3742         case RX_ENC_VHT:
3743                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3744                 ri.mcs = status->rate_idx;
3745                 ri.nss = status->nss;
3746                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3747                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3748
3749                 /*
3750                  * See P802.11REVmd_D3.0, section 21.3.2 for
3751                  * VHT PPDU format.
3752                  */
3753                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3754                         mpdu_offset += 2;
3755                         ts += 36;
3756
3757                         /*
3758                          * Add VHT-LTFs per streams
3759                          */
3760                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3761                                 ri.nss + 1 : ri.nss;
3762                         ts += 4 * n_ltf;
3763                 }
3764
3765                 break;
3766         default:
3767                 WARN_ON(1);
3768                 fallthrough;
3769         case RX_ENC_LEGACY: {
3770                 struct ieee80211_supported_band *sband;
3771                 int shift = 0;
3772                 int bitrate;
3773
3774                 switch (status->bw) {
3775                 case RATE_INFO_BW_10:
3776                         shift = 1;
3777                         break;
3778                 case RATE_INFO_BW_5:
3779                         shift = 2;
3780                         break;
3781                 }
3782
3783                 sband = local->hw.wiphy->bands[status->band];
3784                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3785                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3786
3787                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3788                         if (status->band == NL80211_BAND_5GHZ) {
3789                                 ts += 20 << shift;
3790                                 mpdu_offset += 2;
3791                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3792                                 ts += 96;
3793                         } else {
3794                                 ts += 192;
3795                         }
3796                 }
3797                 break;
3798                 }
3799         }
3800
3801         rate = cfg80211_calculate_bitrate(&ri);
3802         if (WARN_ONCE(!rate,
3803                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3804                       (unsigned long long)status->flag, status->rate_idx,
3805                       status->nss))
3806                 return 0;
3807
3808         /* rewind from end of MPDU */
3809         if (status->flag & RX_FLAG_MACTIME_END)
3810                 ts -= mpdu_len * 8 * 10 / rate;
3811
3812         ts += mpdu_offset * 8 * 10 / rate;
3813
3814         return ts;
3815 }
3816
3817 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3818 {
3819         struct ieee80211_sub_if_data *sdata;
3820         struct cfg80211_chan_def chandef;
3821
3822         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3823         lockdep_assert_wiphy(local->hw.wiphy);
3824
3825         mutex_lock(&local->mtx);
3826         list_for_each_entry(sdata, &local->interfaces, list) {
3827                 /* it might be waiting for the local->mtx, but then
3828                  * by the time it gets it, sdata->wdev.cac_started
3829                  * will no longer be true
3830                  */
3831                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3832
3833                 if (sdata->wdev.cac_started) {
3834                         chandef = sdata->vif.bss_conf.chandef;
3835                         ieee80211_vif_release_channel(sdata);
3836                         cfg80211_cac_event(sdata->dev,
3837                                            &chandef,
3838                                            NL80211_RADAR_CAC_ABORTED,
3839                                            GFP_KERNEL);
3840                 }
3841         }
3842         mutex_unlock(&local->mtx);
3843 }
3844
3845 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3846 {
3847         struct ieee80211_local *local =
3848                 container_of(work, struct ieee80211_local, radar_detected_work);
3849         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3850         struct ieee80211_chanctx *ctx;
3851         int num_chanctx = 0;
3852
3853         mutex_lock(&local->chanctx_mtx);
3854         list_for_each_entry(ctx, &local->chanctx_list, list) {
3855                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3856                         continue;
3857
3858                 num_chanctx++;
3859                 chandef = ctx->conf.def;
3860         }
3861         mutex_unlock(&local->chanctx_mtx);
3862
3863         wiphy_lock(local->hw.wiphy);
3864         ieee80211_dfs_cac_cancel(local);
3865         wiphy_unlock(local->hw.wiphy);
3866
3867         if (num_chanctx > 1)
3868                 /* XXX: multi-channel is not supported yet */
3869                 WARN_ON(1);
3870         else
3871                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3872 }
3873
3874 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3875 {
3876         struct ieee80211_local *local = hw_to_local(hw);
3877
3878         trace_api_radar_detected(local);
3879
3880         schedule_work(&local->radar_detected_work);
3881 }
3882 EXPORT_SYMBOL(ieee80211_radar_detected);
3883
3884 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3885 {
3886         u32 ret;
3887         int tmp;
3888
3889         switch (c->width) {
3890         case NL80211_CHAN_WIDTH_20:
3891                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3892                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3893                 break;
3894         case NL80211_CHAN_WIDTH_40:
3895                 c->width = NL80211_CHAN_WIDTH_20;
3896                 c->center_freq1 = c->chan->center_freq;
3897                 ret = IEEE80211_STA_DISABLE_40MHZ |
3898                       IEEE80211_STA_DISABLE_VHT;
3899                 break;
3900         case NL80211_CHAN_WIDTH_80:
3901                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3902                 /* n_P40 */
3903                 tmp /= 2;
3904                 /* freq_P40 */
3905                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3906                 c->width = NL80211_CHAN_WIDTH_40;
3907                 ret = IEEE80211_STA_DISABLE_VHT;
3908                 break;
3909         case NL80211_CHAN_WIDTH_80P80:
3910                 c->center_freq2 = 0;
3911                 c->width = NL80211_CHAN_WIDTH_80;
3912                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3913                       IEEE80211_STA_DISABLE_160MHZ;
3914                 break;
3915         case NL80211_CHAN_WIDTH_160:
3916                 /* n_P20 */
3917                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3918                 /* n_P80 */
3919                 tmp /= 4;
3920                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3921                 c->width = NL80211_CHAN_WIDTH_80;
3922                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3923                       IEEE80211_STA_DISABLE_160MHZ;
3924                 break;
3925         default:
3926         case NL80211_CHAN_WIDTH_20_NOHT:
3927                 WARN_ON_ONCE(1);
3928                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3929                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3930                 break;
3931         case NL80211_CHAN_WIDTH_1:
3932         case NL80211_CHAN_WIDTH_2:
3933         case NL80211_CHAN_WIDTH_4:
3934         case NL80211_CHAN_WIDTH_8:
3935         case NL80211_CHAN_WIDTH_16:
3936         case NL80211_CHAN_WIDTH_5:
3937         case NL80211_CHAN_WIDTH_10:
3938                 WARN_ON_ONCE(1);
3939                 /* keep c->width */
3940                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3941                 break;
3942         }
3943
3944         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3945
3946         return ret;
3947 }
3948
3949 /*
3950  * Returns true if smps_mode_new is strictly more restrictive than
3951  * smps_mode_old.
3952  */
3953 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3954                                    enum ieee80211_smps_mode smps_mode_new)
3955 {
3956         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3957                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3958                 return false;
3959
3960         switch (smps_mode_old) {
3961         case IEEE80211_SMPS_STATIC:
3962                 return false;
3963         case IEEE80211_SMPS_DYNAMIC:
3964                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3965         case IEEE80211_SMPS_OFF:
3966                 return smps_mode_new != IEEE80211_SMPS_OFF;
3967         default:
3968                 WARN_ON(1);
3969         }
3970
3971         return false;
3972 }
3973
3974 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3975                               struct cfg80211_csa_settings *csa_settings)
3976 {
3977         struct sk_buff *skb;
3978         struct ieee80211_mgmt *mgmt;
3979         struct ieee80211_local *local = sdata->local;
3980         int freq;
3981         int hdr_len = offsetofend(struct ieee80211_mgmt,
3982                                   u.action.u.chan_switch);
3983         u8 *pos;
3984
3985         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3986             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3987                 return -EOPNOTSUPP;
3988
3989         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3990                             5 + /* channel switch announcement element */
3991                             3 + /* secondary channel offset element */
3992                             5 + /* wide bandwidth channel switch announcement */
3993                             8); /* mesh channel switch parameters element */
3994         if (!skb)
3995                 return -ENOMEM;
3996
3997         skb_reserve(skb, local->tx_headroom);
3998         mgmt = skb_put_zero(skb, hdr_len);
3999         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4000                                           IEEE80211_STYPE_ACTION);
4001
4002         eth_broadcast_addr(mgmt->da);
4003         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4004         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4005                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4006         } else {
4007                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4008                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4009         }
4010         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4011         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4012         pos = skb_put(skb, 5);
4013         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4014         *pos++ = 3;                                             /* IE length */
4015         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4016         freq = csa_settings->chandef.chan->center_freq;
4017         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4018         *pos++ = csa_settings->count;                           /* count */
4019
4020         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4021                 enum nl80211_channel_type ch_type;
4022
4023                 skb_put(skb, 3);
4024                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4025                 *pos++ = 1;                                     /* IE length */
4026                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4027                 if (ch_type == NL80211_CHAN_HT40PLUS)
4028                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4029                 else
4030                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4031         }
4032
4033         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4034                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4035
4036                 skb_put(skb, 8);
4037                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4038                 *pos++ = 6;                                     /* IE length */
4039                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4040                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4041                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4042                 *pos++ |= csa_settings->block_tx ?
4043                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4044                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4045                 pos += 2;
4046                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4047                 pos += 2;
4048         }
4049
4050         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4051             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4052             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4053                 skb_put(skb, 5);
4054                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4055         }
4056
4057         ieee80211_tx_skb(sdata, skb);
4058         return 0;
4059 }
4060
4061 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4062 {
4063         return !(cs == NULL || cs->cipher == 0 ||
4064                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4065                  cs->hdr_len <= cs->key_idx_off ||
4066                  cs->key_idx_shift > 7 ||
4067                  cs->key_idx_mask == 0);
4068 }
4069
4070 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4071 {
4072         int i;
4073
4074         /* Ensure we have enough iftype bitmap space for all iftype values */
4075         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4076
4077         for (i = 0; i < n; i++)
4078                 if (!ieee80211_cs_valid(&cs[i]))
4079                         return false;
4080
4081         return true;
4082 }
4083
4084 const struct ieee80211_cipher_scheme *
4085 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4086                  enum nl80211_iftype iftype)
4087 {
4088         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4089         int n = local->hw.n_cipher_schemes;
4090         int i;
4091         const struct ieee80211_cipher_scheme *cs = NULL;
4092
4093         for (i = 0; i < n; i++) {
4094                 if (l[i].cipher == cipher) {
4095                         cs = &l[i];
4096                         break;
4097                 }
4098         }
4099
4100         if (!cs || !(cs->iftype & BIT(iftype)))
4101                 return NULL;
4102
4103         return cs;
4104 }
4105
4106 int ieee80211_cs_headroom(struct ieee80211_local *local,
4107                           struct cfg80211_crypto_settings *crypto,
4108                           enum nl80211_iftype iftype)
4109 {
4110         const struct ieee80211_cipher_scheme *cs;
4111         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4112         int i;
4113
4114         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4115                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4116                                       iftype);
4117
4118                 if (cs && headroom < cs->hdr_len)
4119                         headroom = cs->hdr_len;
4120         }
4121
4122         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4123         if (cs && headroom < cs->hdr_len)
4124                 headroom = cs->hdr_len;
4125
4126         return headroom;
4127 }
4128
4129 static bool
4130 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4131 {
4132         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4133         int skip;
4134
4135         if (end > 0)
4136                 return false;
4137
4138         /* One shot NOA  */
4139         if (data->count[i] == 1)
4140                 return false;
4141
4142         if (data->desc[i].interval == 0)
4143                 return false;
4144
4145         /* End time is in the past, check for repetitions */
4146         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4147         if (data->count[i] < 255) {
4148                 if (data->count[i] <= skip) {
4149                         data->count[i] = 0;
4150                         return false;
4151                 }
4152
4153                 data->count[i] -= skip;
4154         }
4155
4156         data->desc[i].start += skip * data->desc[i].interval;
4157
4158         return true;
4159 }
4160
4161 static bool
4162 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4163                              s32 *offset)
4164 {
4165         bool ret = false;
4166         int i;
4167
4168         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4169                 s32 cur;
4170
4171                 if (!data->count[i])
4172                         continue;
4173
4174                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4175                         ret = true;
4176
4177                 cur = data->desc[i].start - tsf;
4178                 if (cur > *offset)
4179                         continue;
4180
4181                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4182                 if (cur > *offset)
4183                         *offset = cur;
4184         }
4185
4186         return ret;
4187 }
4188
4189 static u32
4190 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4191 {
4192         s32 offset = 0;
4193         int tries = 0;
4194         /*
4195          * arbitrary limit, used to avoid infinite loops when combined NoA
4196          * descriptors cover the full time period.
4197          */
4198         int max_tries = 5;
4199
4200         ieee80211_extend_absent_time(data, tsf, &offset);
4201         do {
4202                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4203                         break;
4204
4205                 tries++;
4206         } while (tries < max_tries);
4207
4208         return offset;
4209 }
4210
4211 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4212 {
4213         u32 next_offset = BIT(31) - 1;
4214         int i;
4215
4216         data->absent = 0;
4217         data->has_next_tsf = false;
4218         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4219                 s32 start;
4220
4221                 if (!data->count[i])
4222                         continue;
4223
4224                 ieee80211_extend_noa_desc(data, tsf, i);
4225                 start = data->desc[i].start - tsf;
4226                 if (start <= 0)
4227                         data->absent |= BIT(i);
4228
4229                 if (next_offset > start)
4230                         next_offset = start;
4231
4232                 data->has_next_tsf = true;
4233         }
4234
4235         if (data->absent)
4236                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4237
4238         data->next_tsf = tsf + next_offset;
4239 }
4240 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4241
4242 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4243                             struct ieee80211_noa_data *data, u32 tsf)
4244 {
4245         int ret = 0;
4246         int i;
4247
4248         memset(data, 0, sizeof(*data));
4249
4250         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4251                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4252
4253                 if (!desc->count || !desc->duration)
4254                         continue;
4255
4256                 data->count[i] = desc->count;
4257                 data->desc[i].start = le32_to_cpu(desc->start_time);
4258                 data->desc[i].duration = le32_to_cpu(desc->duration);
4259                 data->desc[i].interval = le32_to_cpu(desc->interval);
4260
4261                 if (data->count[i] > 1 &&
4262                     data->desc[i].interval < data->desc[i].duration)
4263                         continue;
4264
4265                 ieee80211_extend_noa_desc(data, tsf, i);
4266                 ret++;
4267         }
4268
4269         if (ret)
4270                 ieee80211_update_p2p_noa(data, tsf);
4271
4272         return ret;
4273 }
4274 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4275
4276 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4277                            struct ieee80211_sub_if_data *sdata)
4278 {
4279         u64 tsf = drv_get_tsf(local, sdata);
4280         u64 dtim_count = 0;
4281         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4282         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4283         struct ps_data *ps;
4284         u8 bcns_from_dtim;
4285
4286         if (tsf == -1ULL || !beacon_int || !dtim_period)
4287                 return;
4288
4289         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4290             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4291                 if (!sdata->bss)
4292                         return;
4293
4294                 ps = &sdata->bss->ps;
4295         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4296                 ps = &sdata->u.mesh.ps;
4297         } else {
4298                 return;
4299         }
4300
4301         /*
4302          * actually finds last dtim_count, mac80211 will update in
4303          * __beacon_add_tim().
4304          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4305          */
4306         do_div(tsf, beacon_int);
4307         bcns_from_dtim = do_div(tsf, dtim_period);
4308         /* just had a DTIM */
4309         if (!bcns_from_dtim)
4310                 dtim_count = 0;
4311         else
4312                 dtim_count = dtim_period - bcns_from_dtim;
4313
4314         ps->dtim_count = dtim_count;
4315 }
4316
4317 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4318                                          struct ieee80211_chanctx *ctx)
4319 {
4320         struct ieee80211_sub_if_data *sdata;
4321         u8 radar_detect = 0;
4322
4323         lockdep_assert_held(&local->chanctx_mtx);
4324
4325         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4326                 return 0;
4327
4328         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4329                 if (sdata->reserved_radar_required)
4330                         radar_detect |= BIT(sdata->reserved_chandef.width);
4331
4332         /*
4333          * An in-place reservation context should not have any assigned vifs
4334          * until it replaces the other context.
4335          */
4336         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4337                 !list_empty(&ctx->assigned_vifs));
4338
4339         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4340                 if (sdata->radar_required)
4341                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4342
4343         return radar_detect;
4344 }
4345
4346 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4347                                  const struct cfg80211_chan_def *chandef,
4348                                  enum ieee80211_chanctx_mode chanmode,
4349                                  u8 radar_detect)
4350 {
4351         struct ieee80211_local *local = sdata->local;
4352         struct ieee80211_sub_if_data *sdata_iter;
4353         enum nl80211_iftype iftype = sdata->wdev.iftype;
4354         struct ieee80211_chanctx *ctx;
4355         int total = 1;
4356         struct iface_combination_params params = {
4357                 .radar_detect = radar_detect,
4358         };
4359
4360         lockdep_assert_held(&local->chanctx_mtx);
4361
4362         if (WARN_ON(hweight32(radar_detect) > 1))
4363                 return -EINVAL;
4364
4365         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4366                     !chandef->chan))
4367                 return -EINVAL;
4368
4369         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4370                 return -EINVAL;
4371
4372         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4373             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4374                 /*
4375                  * always passing this is harmless, since it'll be the
4376                  * same value that cfg80211 finds if it finds the same
4377                  * interface ... and that's always allowed
4378                  */
4379                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4380         }
4381
4382         /* Always allow software iftypes */
4383         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4384                 if (radar_detect)
4385                         return -EINVAL;
4386                 return 0;
4387         }
4388
4389         if (chandef)
4390                 params.num_different_channels = 1;
4391
4392         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4393                 params.iftype_num[iftype] = 1;
4394
4395         list_for_each_entry(ctx, &local->chanctx_list, list) {
4396                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4397                         continue;
4398                 params.radar_detect |=
4399                         ieee80211_chanctx_radar_detect(local, ctx);
4400                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4401                         params.num_different_channels++;
4402                         continue;
4403                 }
4404                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4405                     cfg80211_chandef_compatible(chandef,
4406                                                 &ctx->conf.def))
4407                         continue;
4408                 params.num_different_channels++;
4409         }
4410
4411         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4412                 struct wireless_dev *wdev_iter;
4413
4414                 wdev_iter = &sdata_iter->wdev;
4415
4416                 if (sdata_iter == sdata ||
4417                     !ieee80211_sdata_running(sdata_iter) ||
4418                     cfg80211_iftype_allowed(local->hw.wiphy,
4419                                             wdev_iter->iftype, 0, 1))
4420                         continue;
4421
4422                 params.iftype_num[wdev_iter->iftype]++;
4423                 total++;
4424         }
4425
4426         if (total == 1 && !params.radar_detect)
4427                 return 0;
4428
4429         return cfg80211_check_combinations(local->hw.wiphy, &params);
4430 }
4431
4432 static void
4433 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4434                          void *data)
4435 {
4436         u32 *max_num_different_channels = data;
4437
4438         *max_num_different_channels = max(*max_num_different_channels,
4439                                           c->num_different_channels);
4440 }
4441
4442 int ieee80211_max_num_channels(struct ieee80211_local *local)
4443 {
4444         struct ieee80211_sub_if_data *sdata;
4445         struct ieee80211_chanctx *ctx;
4446         u32 max_num_different_channels = 1;
4447         int err;
4448         struct iface_combination_params params = {0};
4449
4450         lockdep_assert_held(&local->chanctx_mtx);
4451
4452         list_for_each_entry(ctx, &local->chanctx_list, list) {
4453                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4454                         continue;
4455
4456                 params.num_different_channels++;
4457
4458                 params.radar_detect |=
4459                         ieee80211_chanctx_radar_detect(local, ctx);
4460         }
4461
4462         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4463                 params.iftype_num[sdata->wdev.iftype]++;
4464
4465         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4466                                          ieee80211_iter_max_chans,
4467                                          &max_num_different_channels);
4468         if (err < 0)
4469                 return err;
4470
4471         return max_num_different_channels;
4472 }
4473
4474 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4475                                 struct ieee80211_sta_s1g_cap *caps,
4476                                 struct sk_buff *skb)
4477 {
4478         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4479         struct ieee80211_s1g_cap s1g_capab;
4480         u8 *pos;
4481         int i;
4482
4483         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4484                 return;
4485
4486         if (!caps->s1g)
4487                 return;
4488
4489         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4490         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4491
4492         /* override the capability info */
4493         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4494                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4495
4496                 s1g_capab.capab_info[i] &= ~mask;
4497                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4498         }
4499
4500         /* then MCS and NSS set */
4501         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4502                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4503
4504                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4505                 s1g_capab.supp_mcs_nss[i] |=
4506                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4507         }
4508
4509         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4510         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4511         *pos++ = sizeof(s1g_capab);
4512
4513         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4514 }
4515
4516 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4517                                   struct sk_buff *skb)
4518 {
4519         u8 *pos = skb_put(skb, 3);
4520
4521         *pos++ = WLAN_EID_AID_REQUEST;
4522         *pos++ = 1;
4523         *pos++ = 0;
4524 }
4525
4526 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4527 {
4528         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4529         *buf++ = 7; /* len */
4530         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4531         *buf++ = 0x50;
4532         *buf++ = 0xf2;
4533         *buf++ = 2; /* WME */
4534         *buf++ = 0; /* WME info */
4535         *buf++ = 1; /* WME ver */
4536         *buf++ = qosinfo; /* U-APSD no in use */
4537
4538         return buf;
4539 }
4540
4541 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4542                              unsigned long *frame_cnt,
4543                              unsigned long *byte_cnt)
4544 {
4545         struct txq_info *txqi = to_txq_info(txq);
4546         u32 frag_cnt = 0, frag_bytes = 0;
4547         struct sk_buff *skb;
4548
4549         skb_queue_walk(&txqi->frags, skb) {
4550                 frag_cnt++;
4551                 frag_bytes += skb->len;
4552         }
4553
4554         if (frame_cnt)
4555                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4556
4557         if (byte_cnt)
4558                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4559 }
4560 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4561
4562 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4563         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4564         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4565         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4566         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4567 };
4568
4569 u16 ieee80211_encode_usf(int listen_interval)
4570 {
4571         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4572         u16 ui, usf = 0;
4573
4574         /* find greatest USF */
4575         while (usf < IEEE80211_MAX_USF) {
4576                 if (listen_interval % listen_int_usf[usf + 1])
4577                         break;
4578                 usf += 1;
4579         }
4580         ui = listen_interval / listen_int_usf[usf];
4581
4582         /* error if there is a remainder. Should've been checked by user */
4583         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4584         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4585                           FIELD_PREP(LISTEN_INT_UI, ui);
4586
4587         return (u16) listen_interval;
4588 }