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_TX_POWER_ENVELOPE:
1340                         if (elen < 1 ||
1341                             elen > sizeof(struct ieee80211_tx_pwr_env))
1342                                 break;
1343
1344                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1345                                 break;
1346
1347                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1348                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1349                         elems->tx_pwr_env_num++;
1350                         break;
1351                 case WLAN_EID_EXTENSION:
1352                         ieee80211_parse_extension_element(calc_crc ?
1353                                                                 &crc : NULL,
1354                                                           elem, elems);
1355                         break;
1356                 case WLAN_EID_S1G_CAPABILITIES:
1357                         if (elen >= sizeof(*elems->s1g_capab))
1358                                 elems->s1g_capab = (void *)pos;
1359                         else
1360                                 elem_parse_failed = true;
1361                         break;
1362                 case WLAN_EID_S1G_OPERATION:
1363                         if (elen == sizeof(*elems->s1g_oper))
1364                                 elems->s1g_oper = (void *)pos;
1365                         else
1366                                 elem_parse_failed = true;
1367                         break;
1368                 case WLAN_EID_S1G_BCN_COMPAT:
1369                         if (elen == sizeof(*elems->s1g_bcn_compat))
1370                                 elems->s1g_bcn_compat = (void *)pos;
1371                         else
1372                                 elem_parse_failed = true;
1373                         break;
1374                 case WLAN_EID_AID_RESPONSE:
1375                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1376                                 elems->aid_resp = (void *)pos;
1377                         else
1378                                 elem_parse_failed = true;
1379                         break;
1380                 default:
1381                         break;
1382                 }
1383
1384                 if (elem_parse_failed)
1385                         elems->parse_error = true;
1386                 else
1387                         __set_bit(id, seen_elems);
1388         }
1389
1390         if (!for_each_element_completed(elem, start, len))
1391                 elems->parse_error = true;
1392
1393         return crc;
1394 }
1395
1396 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1397                                             struct ieee802_11_elems *elems,
1398                                             u8 *transmitter_bssid,
1399                                             u8 *bss_bssid,
1400                                             u8 *nontransmitted_profile)
1401 {
1402         const struct element *elem, *sub;
1403         size_t profile_len = 0;
1404         bool found = false;
1405
1406         if (!bss_bssid || !transmitter_bssid)
1407                 return profile_len;
1408
1409         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1410                 if (elem->datalen < 2)
1411                         continue;
1412
1413                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1414                         u8 new_bssid[ETH_ALEN];
1415                         const u8 *index;
1416
1417                         if (sub->id != 0 || sub->datalen < 4) {
1418                                 /* not a valid BSS profile */
1419                                 continue;
1420                         }
1421
1422                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1423                             sub->data[1] != 2) {
1424                                 /* The first element of the
1425                                  * Nontransmitted BSSID Profile is not
1426                                  * the Nontransmitted BSSID Capability
1427                                  * element.
1428                                  */
1429                                 continue;
1430                         }
1431
1432                         memset(nontransmitted_profile, 0, len);
1433                         profile_len = cfg80211_merge_profile(start, len,
1434                                                              elem,
1435                                                              sub,
1436                                                              nontransmitted_profile,
1437                                                              len);
1438
1439                         /* found a Nontransmitted BSSID Profile */
1440                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1441                                                  nontransmitted_profile,
1442                                                  profile_len);
1443                         if (!index || index[1] < 1 || index[2] == 0) {
1444                                 /* Invalid MBSSID Index element */
1445                                 continue;
1446                         }
1447
1448                         cfg80211_gen_new_bssid(transmitter_bssid,
1449                                                elem->data[0],
1450                                                index[2],
1451                                                new_bssid);
1452                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1453                                 found = true;
1454                                 elems->bssid_index_len = index[1];
1455                                 elems->bssid_index = (void *)&index[2];
1456                                 break;
1457                         }
1458                 }
1459         }
1460
1461         return found ? profile_len : 0;
1462 }
1463
1464 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1465                                struct ieee802_11_elems *elems,
1466                                u64 filter, u32 crc, u8 *transmitter_bssid,
1467                                u8 *bss_bssid)
1468 {
1469         const struct element *non_inherit = NULL;
1470         u8 *nontransmitted_profile;
1471         int nontransmitted_profile_len = 0;
1472
1473         memset(elems, 0, sizeof(*elems));
1474         elems->ie_start = start;
1475         elems->total_len = len;
1476
1477         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1478         if (nontransmitted_profile) {
1479                 nontransmitted_profile_len =
1480                         ieee802_11_find_bssid_profile(start, len, elems,
1481                                                       transmitter_bssid,
1482                                                       bss_bssid,
1483                                                       nontransmitted_profile);
1484                 non_inherit =
1485                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1486                                                nontransmitted_profile,
1487                                                nontransmitted_profile_len);
1488         }
1489
1490         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1491                                           crc, non_inherit);
1492
1493         /* Override with nontransmitted profile, if found */
1494         if (nontransmitted_profile_len)
1495                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1496                                             nontransmitted_profile_len,
1497                                             action, elems, 0, 0, NULL);
1498
1499         if (elems->tim && !elems->parse_error) {
1500                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1501
1502                 elems->dtim_period = tim_ie->dtim_period;
1503                 elems->dtim_count = tim_ie->dtim_count;
1504         }
1505
1506         /* Override DTIM period and count if needed */
1507         if (elems->bssid_index &&
1508             elems->bssid_index_len >=
1509             offsetofend(struct ieee80211_bssid_index, dtim_period))
1510                 elems->dtim_period = elems->bssid_index->dtim_period;
1511
1512         if (elems->bssid_index &&
1513             elems->bssid_index_len >=
1514             offsetofend(struct ieee80211_bssid_index, dtim_count))
1515                 elems->dtim_count = elems->bssid_index->dtim_count;
1516
1517         kfree(nontransmitted_profile);
1518
1519         return crc;
1520 }
1521
1522 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1523                                            struct ieee80211_tx_queue_params
1524                                            *qparam, int ac)
1525 {
1526         struct ieee80211_chanctx_conf *chanctx_conf;
1527         const struct ieee80211_reg_rule *rrule;
1528         const struct ieee80211_wmm_ac *wmm_ac;
1529         u16 center_freq = 0;
1530
1531         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1532             sdata->vif.type != NL80211_IFTYPE_STATION)
1533                 return;
1534
1535         rcu_read_lock();
1536         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1537         if (chanctx_conf)
1538                 center_freq = chanctx_conf->def.chan->center_freq;
1539
1540         if (!center_freq) {
1541                 rcu_read_unlock();
1542                 return;
1543         }
1544
1545         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1546
1547         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1548                 rcu_read_unlock();
1549                 return;
1550         }
1551
1552         if (sdata->vif.type == NL80211_IFTYPE_AP)
1553                 wmm_ac = &rrule->wmm_rule.ap[ac];
1554         else
1555                 wmm_ac = &rrule->wmm_rule.client[ac];
1556         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1557         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1558         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1559         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1560         rcu_read_unlock();
1561 }
1562
1563 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1564                                bool bss_notify, bool enable_qos)
1565 {
1566         struct ieee80211_local *local = sdata->local;
1567         struct ieee80211_tx_queue_params qparam;
1568         struct ieee80211_chanctx_conf *chanctx_conf;
1569         int ac;
1570         bool use_11b;
1571         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1572         int aCWmin, aCWmax;
1573
1574         if (!local->ops->conf_tx)
1575                 return;
1576
1577         if (local->hw.queues < IEEE80211_NUM_ACS)
1578                 return;
1579
1580         memset(&qparam, 0, sizeof(qparam));
1581
1582         rcu_read_lock();
1583         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1584         use_11b = (chanctx_conf &&
1585                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1586                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1587         rcu_read_unlock();
1588
1589         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1590
1591         /* Set defaults according to 802.11-2007 Table 7-37 */
1592         aCWmax = 1023;
1593         if (use_11b)
1594                 aCWmin = 31;
1595         else
1596                 aCWmin = 15;
1597
1598         /* Confiure old 802.11b/g medium access rules. */
1599         qparam.cw_max = aCWmax;
1600         qparam.cw_min = aCWmin;
1601         qparam.txop = 0;
1602         qparam.aifs = 2;
1603
1604         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1605                 /* Update if QoS is enabled. */
1606                 if (enable_qos) {
1607                         switch (ac) {
1608                         case IEEE80211_AC_BK:
1609                                 qparam.cw_max = aCWmax;
1610                                 qparam.cw_min = aCWmin;
1611                                 qparam.txop = 0;
1612                                 if (is_ocb)
1613                                         qparam.aifs = 9;
1614                                 else
1615                                         qparam.aifs = 7;
1616                                 break;
1617                         /* never happens but let's not leave undefined */
1618                         default:
1619                         case IEEE80211_AC_BE:
1620                                 qparam.cw_max = aCWmax;
1621                                 qparam.cw_min = aCWmin;
1622                                 qparam.txop = 0;
1623                                 if (is_ocb)
1624                                         qparam.aifs = 6;
1625                                 else
1626                                         qparam.aifs = 3;
1627                                 break;
1628                         case IEEE80211_AC_VI:
1629                                 qparam.cw_max = aCWmin;
1630                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1631                                 if (is_ocb)
1632                                         qparam.txop = 0;
1633                                 else if (use_11b)
1634                                         qparam.txop = 6016/32;
1635                                 else
1636                                         qparam.txop = 3008/32;
1637
1638                                 if (is_ocb)
1639                                         qparam.aifs = 3;
1640                                 else
1641                                         qparam.aifs = 2;
1642                                 break;
1643                         case IEEE80211_AC_VO:
1644                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1645                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1646                                 if (is_ocb)
1647                                         qparam.txop = 0;
1648                                 else if (use_11b)
1649                                         qparam.txop = 3264/32;
1650                                 else
1651                                         qparam.txop = 1504/32;
1652                                 qparam.aifs = 2;
1653                                 break;
1654                         }
1655                 }
1656                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1657
1658                 qparam.uapsd = false;
1659
1660                 sdata->tx_conf[ac] = qparam;
1661                 drv_conf_tx(local, sdata, ac, &qparam);
1662         }
1663
1664         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1665             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1666             sdata->vif.type != NL80211_IFTYPE_NAN) {
1667                 sdata->vif.bss_conf.qos = enable_qos;
1668                 if (bss_notify)
1669                         ieee80211_bss_info_change_notify(sdata,
1670                                                          BSS_CHANGED_QOS);
1671         }
1672 }
1673
1674 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1675                          u16 transaction, u16 auth_alg, u16 status,
1676                          const u8 *extra, size_t extra_len, const u8 *da,
1677                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1678                          u32 tx_flags)
1679 {
1680         struct ieee80211_local *local = sdata->local;
1681         struct sk_buff *skb;
1682         struct ieee80211_mgmt *mgmt;
1683         int err;
1684
1685         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1686         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1687                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1688         if (!skb)
1689                 return;
1690
1691         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1692
1693         mgmt = skb_put_zero(skb, 24 + 6);
1694         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1695                                           IEEE80211_STYPE_AUTH);
1696         memcpy(mgmt->da, da, ETH_ALEN);
1697         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1698         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1699         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1700         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1701         mgmt->u.auth.status_code = cpu_to_le16(status);
1702         if (extra)
1703                 skb_put_data(skb, extra, extra_len);
1704
1705         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1706                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1707                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1708                 if (WARN_ON(err)) {
1709                         kfree_skb(skb);
1710                         return;
1711                 }
1712         }
1713
1714         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1715                                         tx_flags;
1716         ieee80211_tx_skb(sdata, skb);
1717 }
1718
1719 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1720                                     const u8 *da, const u8 *bssid,
1721                                     u16 stype, u16 reason,
1722                                     bool send_frame, u8 *frame_buf)
1723 {
1724         struct ieee80211_local *local = sdata->local;
1725         struct sk_buff *skb;
1726         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1727
1728         /* build frame */
1729         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1730         mgmt->duration = 0; /* initialize only */
1731         mgmt->seq_ctrl = 0; /* initialize only */
1732         memcpy(mgmt->da, da, ETH_ALEN);
1733         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1734         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1735         /* u.deauth.reason_code == u.disassoc.reason_code */
1736         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1737
1738         if (send_frame) {
1739                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1740                                     IEEE80211_DEAUTH_FRAME_LEN);
1741                 if (!skb)
1742                         return;
1743
1744                 skb_reserve(skb, local->hw.extra_tx_headroom);
1745
1746                 /* copy in frame */
1747                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1748
1749                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1750                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1751                         IEEE80211_SKB_CB(skb)->flags |=
1752                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1753
1754                 ieee80211_tx_skb(sdata, skb);
1755         }
1756 }
1757
1758 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1759 {
1760         if ((end - pos) < 5)
1761                 return pos;
1762
1763         *pos++ = WLAN_EID_EXTENSION;
1764         *pos++ = 1 + sizeof(cap);
1765         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1766         memcpy(pos, &cap, sizeof(cap));
1767
1768         return pos + 2;
1769 }
1770
1771 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1772                                          u8 *buffer, size_t buffer_len,
1773                                          const u8 *ie, size_t ie_len,
1774                                          enum nl80211_band band,
1775                                          u32 rate_mask,
1776                                          struct cfg80211_chan_def *chandef,
1777                                          size_t *offset, u32 flags)
1778 {
1779         struct ieee80211_local *local = sdata->local;
1780         struct ieee80211_supported_band *sband;
1781         const struct ieee80211_sta_he_cap *he_cap;
1782         u8 *pos = buffer, *end = buffer + buffer_len;
1783         size_t noffset;
1784         int supp_rates_len, i;
1785         u8 rates[32];
1786         int num_rates;
1787         int ext_rates_len;
1788         int shift;
1789         u32 rate_flags;
1790         bool have_80mhz = false;
1791
1792         *offset = 0;
1793
1794         sband = local->hw.wiphy->bands[band];
1795         if (WARN_ON_ONCE(!sband))
1796                 return 0;
1797
1798         rate_flags = ieee80211_chandef_rate_flags(chandef);
1799         shift = ieee80211_chandef_get_shift(chandef);
1800
1801         num_rates = 0;
1802         for (i = 0; i < sband->n_bitrates; i++) {
1803                 if ((BIT(i) & rate_mask) == 0)
1804                         continue; /* skip rate */
1805                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1806                         continue;
1807
1808                 rates[num_rates++] =
1809                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1810                                           (1 << shift) * 5);
1811         }
1812
1813         supp_rates_len = min_t(int, num_rates, 8);
1814
1815         if (end - pos < 2 + supp_rates_len)
1816                 goto out_err;
1817         *pos++ = WLAN_EID_SUPP_RATES;
1818         *pos++ = supp_rates_len;
1819         memcpy(pos, rates, supp_rates_len);
1820         pos += supp_rates_len;
1821
1822         /* insert "request information" if in custom IEs */
1823         if (ie && ie_len) {
1824                 static const u8 before_extrates[] = {
1825                         WLAN_EID_SSID,
1826                         WLAN_EID_SUPP_RATES,
1827                         WLAN_EID_REQUEST,
1828                 };
1829                 noffset = ieee80211_ie_split(ie, ie_len,
1830                                              before_extrates,
1831                                              ARRAY_SIZE(before_extrates),
1832                                              *offset);
1833                 if (end - pos < noffset - *offset)
1834                         goto out_err;
1835                 memcpy(pos, ie + *offset, noffset - *offset);
1836                 pos += noffset - *offset;
1837                 *offset = noffset;
1838         }
1839
1840         ext_rates_len = num_rates - supp_rates_len;
1841         if (ext_rates_len > 0) {
1842                 if (end - pos < 2 + ext_rates_len)
1843                         goto out_err;
1844                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1845                 *pos++ = ext_rates_len;
1846                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1847                 pos += ext_rates_len;
1848         }
1849
1850         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1851                 if (end - pos < 3)
1852                         goto out_err;
1853                 *pos++ = WLAN_EID_DS_PARAMS;
1854                 *pos++ = 1;
1855                 *pos++ = ieee80211_frequency_to_channel(
1856                                 chandef->chan->center_freq);
1857         }
1858
1859         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1860                 goto done;
1861
1862         /* insert custom IEs that go before HT */
1863         if (ie && ie_len) {
1864                 static const u8 before_ht[] = {
1865                         /*
1866                          * no need to list the ones split off already
1867                          * (or generated here)
1868                          */
1869                         WLAN_EID_DS_PARAMS,
1870                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1871                 };
1872                 noffset = ieee80211_ie_split(ie, ie_len,
1873                                              before_ht, ARRAY_SIZE(before_ht),
1874                                              *offset);
1875                 if (end - pos < noffset - *offset)
1876                         goto out_err;
1877                 memcpy(pos, ie + *offset, noffset - *offset);
1878                 pos += noffset - *offset;
1879                 *offset = noffset;
1880         }
1881
1882         if (sband->ht_cap.ht_supported) {
1883                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1884                         goto out_err;
1885                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1886                                                 sband->ht_cap.cap);
1887         }
1888
1889         /* insert custom IEs that go before VHT */
1890         if (ie && ie_len) {
1891                 static const u8 before_vht[] = {
1892                         /*
1893                          * no need to list the ones split off already
1894                          * (or generated here)
1895                          */
1896                         WLAN_EID_BSS_COEX_2040,
1897                         WLAN_EID_EXT_CAPABILITY,
1898                         WLAN_EID_SSID_LIST,
1899                         WLAN_EID_CHANNEL_USAGE,
1900                         WLAN_EID_INTERWORKING,
1901                         WLAN_EID_MESH_ID,
1902                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1903                 };
1904                 noffset = ieee80211_ie_split(ie, ie_len,
1905                                              before_vht, ARRAY_SIZE(before_vht),
1906                                              *offset);
1907                 if (end - pos < noffset - *offset)
1908                         goto out_err;
1909                 memcpy(pos, ie + *offset, noffset - *offset);
1910                 pos += noffset - *offset;
1911                 *offset = noffset;
1912         }
1913
1914         /* Check if any channel in this sband supports at least 80 MHz */
1915         for (i = 0; i < sband->n_channels; i++) {
1916                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1917                                                 IEEE80211_CHAN_NO_80MHZ))
1918                         continue;
1919
1920                 have_80mhz = true;
1921                 break;
1922         }
1923
1924         if (sband->vht_cap.vht_supported && have_80mhz) {
1925                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1926                         goto out_err;
1927                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1928                                                  sband->vht_cap.cap);
1929         }
1930
1931         /* insert custom IEs that go before HE */
1932         if (ie && ie_len) {
1933                 static const u8 before_he[] = {
1934                         /*
1935                          * no need to list the ones split off before VHT
1936                          * or generated here
1937                          */
1938                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1939                         WLAN_EID_AP_CSN,
1940                         /* TODO: add 11ah/11aj/11ak elements */
1941                 };
1942                 noffset = ieee80211_ie_split(ie, ie_len,
1943                                              before_he, ARRAY_SIZE(before_he),
1944                                              *offset);
1945                 if (end - pos < noffset - *offset)
1946                         goto out_err;
1947                 memcpy(pos, ie + *offset, noffset - *offset);
1948                 pos += noffset - *offset;
1949                 *offset = noffset;
1950         }
1951
1952         he_cap = ieee80211_get_he_iftype_cap(sband,
1953                                              ieee80211_vif_type_p2p(&sdata->vif));
1954         if (he_cap &&
1955             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1956                                          IEEE80211_CHAN_NO_HE)) {
1957                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1958                 if (!pos)
1959                         goto out_err;
1960         }
1961
1962         if (cfg80211_any_usable_channels(local->hw.wiphy,
1963                                          BIT(NL80211_BAND_6GHZ),
1964                                          IEEE80211_CHAN_NO_HE)) {
1965                 struct ieee80211_supported_band *sband6;
1966
1967                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1968                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1969                                 ieee80211_vif_type_p2p(&sdata->vif));
1970
1971                 if (he_cap) {
1972                         enum nl80211_iftype iftype =
1973                                 ieee80211_vif_type_p2p(&sdata->vif);
1974                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1975
1976                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1977                 }
1978         }
1979
1980         /*
1981          * If adding more here, adjust code in main.c
1982          * that calculates local->scan_ies_len.
1983          */
1984
1985         return pos - buffer;
1986  out_err:
1987         WARN_ONCE(1, "not enough space for preq IEs\n");
1988  done:
1989         return pos - buffer;
1990 }
1991
1992 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1993                              size_t buffer_len,
1994                              struct ieee80211_scan_ies *ie_desc,
1995                              const u8 *ie, size_t ie_len,
1996                              u8 bands_used, u32 *rate_masks,
1997                              struct cfg80211_chan_def *chandef,
1998                              u32 flags)
1999 {
2000         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2001         int i;
2002
2003         memset(ie_desc, 0, sizeof(*ie_desc));
2004
2005         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2006                 if (bands_used & BIT(i)) {
2007                         pos += ieee80211_build_preq_ies_band(sdata,
2008                                                              buffer + pos,
2009                                                              buffer_len - pos,
2010                                                              ie, ie_len, i,
2011                                                              rate_masks[i],
2012                                                              chandef,
2013                                                              &custom_ie_offset,
2014                                                              flags);
2015                         ie_desc->ies[i] = buffer + old_pos;
2016                         ie_desc->len[i] = pos - old_pos;
2017                         old_pos = pos;
2018                 }
2019         }
2020
2021         /* add any remaining custom IEs */
2022         if (ie && ie_len) {
2023                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2024                               "not enough space for preq custom IEs\n"))
2025                         return pos;
2026                 memcpy(buffer + pos, ie + custom_ie_offset,
2027                        ie_len - custom_ie_offset);
2028                 ie_desc->common_ies = buffer + pos;
2029                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2030                 pos += ie_len - custom_ie_offset;
2031         }
2032
2033         return pos;
2034 };
2035
2036 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2037                                           const u8 *src, const u8 *dst,
2038                                           u32 ratemask,
2039                                           struct ieee80211_channel *chan,
2040                                           const u8 *ssid, size_t ssid_len,
2041                                           const u8 *ie, size_t ie_len,
2042                                           u32 flags)
2043 {
2044         struct ieee80211_local *local = sdata->local;
2045         struct cfg80211_chan_def chandef;
2046         struct sk_buff *skb;
2047         struct ieee80211_mgmt *mgmt;
2048         int ies_len;
2049         u32 rate_masks[NUM_NL80211_BANDS] = {};
2050         struct ieee80211_scan_ies dummy_ie_desc;
2051
2052         /*
2053          * Do not send DS Channel parameter for directed probe requests
2054          * in order to maximize the chance that we get a response.  Some
2055          * badly-behaved APs don't respond when this parameter is included.
2056          */
2057         chandef.width = sdata->vif.bss_conf.chandef.width;
2058         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2059                 chandef.chan = NULL;
2060         else
2061                 chandef.chan = chan;
2062
2063         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2064                                      100 + ie_len);
2065         if (!skb)
2066                 return NULL;
2067
2068         rate_masks[chan->band] = ratemask;
2069         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2070                                            skb_tailroom(skb), &dummy_ie_desc,
2071                                            ie, ie_len, BIT(chan->band),
2072                                            rate_masks, &chandef, flags);
2073         skb_put(skb, ies_len);
2074
2075         if (dst) {
2076                 mgmt = (struct ieee80211_mgmt *) skb->data;
2077                 memcpy(mgmt->da, dst, ETH_ALEN);
2078                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2079         }
2080
2081         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2082
2083         return skb;
2084 }
2085
2086 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2087                             struct ieee802_11_elems *elems,
2088                             enum nl80211_band band, u32 *basic_rates)
2089 {
2090         struct ieee80211_supported_band *sband;
2091         size_t num_rates;
2092         u32 supp_rates, rate_flags;
2093         int i, j, shift;
2094
2095         sband = sdata->local->hw.wiphy->bands[band];
2096         if (WARN_ON(!sband))
2097                 return 1;
2098
2099         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2100         shift = ieee80211_vif_get_shift(&sdata->vif);
2101
2102         num_rates = sband->n_bitrates;
2103         supp_rates = 0;
2104         for (i = 0; i < elems->supp_rates_len +
2105                      elems->ext_supp_rates_len; i++) {
2106                 u8 rate = 0;
2107                 int own_rate;
2108                 bool is_basic;
2109                 if (i < elems->supp_rates_len)
2110                         rate = elems->supp_rates[i];
2111                 else if (elems->ext_supp_rates)
2112                         rate = elems->ext_supp_rates
2113                                 [i - elems->supp_rates_len];
2114                 own_rate = 5 * (rate & 0x7f);
2115                 is_basic = !!(rate & 0x80);
2116
2117                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2118                         continue;
2119
2120                 for (j = 0; j < num_rates; j++) {
2121                         int brate;
2122                         if ((rate_flags & sband->bitrates[j].flags)
2123                             != rate_flags)
2124                                 continue;
2125
2126                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2127                                              1 << shift);
2128
2129                         if (brate == own_rate) {
2130                                 supp_rates |= BIT(j);
2131                                 if (basic_rates && is_basic)
2132                                         *basic_rates |= BIT(j);
2133                         }
2134                 }
2135         }
2136         return supp_rates;
2137 }
2138
2139 void ieee80211_stop_device(struct ieee80211_local *local)
2140 {
2141         ieee80211_led_radio(local, false);
2142         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2143
2144         cancel_work_sync(&local->reconfig_filter);
2145
2146         flush_workqueue(local->workqueue);
2147         drv_stop(local);
2148 }
2149
2150 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2151                                            bool aborted)
2152 {
2153         /* It's possible that we don't handle the scan completion in
2154          * time during suspend, so if it's still marked as completed
2155          * here, queue the work and flush it to clean things up.
2156          * Instead of calling the worker function directly here, we
2157          * really queue it to avoid potential races with other flows
2158          * scheduling the same work.
2159          */
2160         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2161                 /* If coming from reconfiguration failure, abort the scan so
2162                  * we don't attempt to continue a partial HW scan - which is
2163                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2164                  * completed scan, and a 5 GHz portion is still pending.
2165                  */
2166                 if (aborted)
2167                         set_bit(SCAN_ABORTED, &local->scanning);
2168                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2169                 flush_delayed_work(&local->scan_work);
2170         }
2171 }
2172
2173 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2174 {
2175         struct ieee80211_sub_if_data *sdata;
2176         struct ieee80211_chanctx *ctx;
2177
2178         /*
2179          * We get here if during resume the device can't be restarted properly.
2180          * We might also get here if this happens during HW reset, which is a
2181          * slightly different situation and we need to drop all connections in
2182          * the latter case.
2183          *
2184          * Ask cfg80211 to turn off all interfaces, this will result in more
2185          * warnings but at least we'll then get into a clean stopped state.
2186          */
2187
2188         local->resuming = false;
2189         local->suspended = false;
2190         local->in_reconfig = false;
2191
2192         ieee80211_flush_completed_scan(local, true);
2193
2194         /* scheduled scan clearly can't be running any more, but tell
2195          * cfg80211 and clear local state
2196          */
2197         ieee80211_sched_scan_end(local);
2198
2199         list_for_each_entry(sdata, &local->interfaces, list)
2200                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2201
2202         /* Mark channel contexts as not being in the driver any more to avoid
2203          * removing them from the driver during the shutdown process...
2204          */
2205         mutex_lock(&local->chanctx_mtx);
2206         list_for_each_entry(ctx, &local->chanctx_list, list)
2207                 ctx->driver_present = false;
2208         mutex_unlock(&local->chanctx_mtx);
2209 }
2210
2211 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2212                                      struct ieee80211_sub_if_data *sdata)
2213 {
2214         struct ieee80211_chanctx_conf *conf;
2215         struct ieee80211_chanctx *ctx;
2216
2217         if (!local->use_chanctx)
2218                 return;
2219
2220         mutex_lock(&local->chanctx_mtx);
2221         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2222                                          lockdep_is_held(&local->chanctx_mtx));
2223         if (conf) {
2224                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2225                 drv_assign_vif_chanctx(local, sdata, ctx);
2226         }
2227         mutex_unlock(&local->chanctx_mtx);
2228 }
2229
2230 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2231 {
2232         struct ieee80211_local *local = sdata->local;
2233         struct sta_info *sta;
2234
2235         /* add STAs back */
2236         mutex_lock(&local->sta_mtx);
2237         list_for_each_entry(sta, &local->sta_list, list) {
2238                 enum ieee80211_sta_state state;
2239
2240                 if (!sta->uploaded || sta->sdata != sdata)
2241                         continue;
2242
2243                 for (state = IEEE80211_STA_NOTEXIST;
2244                      state < sta->sta_state; state++)
2245                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2246                                               state + 1));
2247         }
2248         mutex_unlock(&local->sta_mtx);
2249 }
2250
2251 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2252 {
2253         struct cfg80211_nan_func *func, **funcs;
2254         int res, id, i = 0;
2255
2256         res = drv_start_nan(sdata->local, sdata,
2257                             &sdata->u.nan.conf);
2258         if (WARN_ON(res))
2259                 return res;
2260
2261         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2262                         sizeof(*funcs),
2263                         GFP_KERNEL);
2264         if (!funcs)
2265                 return -ENOMEM;
2266
2267         /* Add all the functions:
2268          * This is a little bit ugly. We need to call a potentially sleeping
2269          * callback for each NAN function, so we can't hold the spinlock.
2270          */
2271         spin_lock_bh(&sdata->u.nan.func_lock);
2272
2273         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2274                 funcs[i++] = func;
2275
2276         spin_unlock_bh(&sdata->u.nan.func_lock);
2277
2278         for (i = 0; funcs[i]; i++) {
2279                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2280                 if (WARN_ON(res))
2281                         ieee80211_nan_func_terminated(&sdata->vif,
2282                                                       funcs[i]->instance_id,
2283                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2284                                                       GFP_KERNEL);
2285         }
2286
2287         kfree(funcs);
2288
2289         return 0;
2290 }
2291
2292 int ieee80211_reconfig(struct ieee80211_local *local)
2293 {
2294         struct ieee80211_hw *hw = &local->hw;
2295         struct ieee80211_sub_if_data *sdata;
2296         struct ieee80211_chanctx *ctx;
2297         struct sta_info *sta;
2298         int res, i;
2299         bool reconfig_due_to_wowlan = false;
2300         struct ieee80211_sub_if_data *sched_scan_sdata;
2301         struct cfg80211_sched_scan_request *sched_scan_req;
2302         bool sched_scan_stopped = false;
2303         bool suspended = local->suspended;
2304
2305         /* nothing to do if HW shouldn't run */
2306         if (!local->open_count)
2307                 goto wake_up;
2308
2309 #ifdef CONFIG_PM
2310         if (suspended)
2311                 local->resuming = true;
2312
2313         if (local->wowlan) {
2314                 /*
2315                  * In the wowlan case, both mac80211 and the device
2316                  * are functional when the resume op is called, so
2317                  * clear local->suspended so the device could operate
2318                  * normally (e.g. pass rx frames).
2319                  */
2320                 local->suspended = false;
2321                 res = drv_resume(local);
2322                 local->wowlan = false;
2323                 if (res < 0) {
2324                         local->resuming = false;
2325                         return res;
2326                 }
2327                 if (res == 0)
2328                         goto wake_up;
2329                 WARN_ON(res > 1);
2330                 /*
2331                  * res is 1, which means the driver requested
2332                  * to go through a regular reset on wakeup.
2333                  * restore local->suspended in this case.
2334                  */
2335                 reconfig_due_to_wowlan = true;
2336                 local->suspended = true;
2337         }
2338 #endif
2339
2340         /*
2341          * In case of hw_restart during suspend (without wowlan),
2342          * cancel restart work, as we are reconfiguring the device
2343          * anyway.
2344          * Note that restart_work is scheduled on a frozen workqueue,
2345          * so we can't deadlock in this case.
2346          */
2347         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2348                 cancel_work_sync(&local->restart_work);
2349
2350         local->started = false;
2351
2352         /*
2353          * Upon resume hardware can sometimes be goofy due to
2354          * various platform / driver / bus issues, so restarting
2355          * the device may at times not work immediately. Propagate
2356          * the error.
2357          */
2358         res = drv_start(local);
2359         if (res) {
2360                 if (suspended)
2361                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2362                 else
2363                         WARN(1, "Hardware became unavailable during restart.\n");
2364                 ieee80211_handle_reconfig_failure(local);
2365                 return res;
2366         }
2367
2368         /* setup fragmentation threshold */
2369         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2370
2371         /* setup RTS threshold */
2372         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2373
2374         /* reset coverage class */
2375         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2376
2377         ieee80211_led_radio(local, true);
2378         ieee80211_mod_tpt_led_trig(local,
2379                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2380
2381         /* add interfaces */
2382         sdata = rtnl_dereference(local->monitor_sdata);
2383         if (sdata) {
2384                 /* in HW restart it exists already */
2385                 WARN_ON(local->resuming);
2386                 res = drv_add_interface(local, sdata);
2387                 if (WARN_ON(res)) {
2388                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2389                         synchronize_net();
2390                         kfree(sdata);
2391                 }
2392         }
2393
2394         list_for_each_entry(sdata, &local->interfaces, list) {
2395                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2396                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2397                     ieee80211_sdata_running(sdata)) {
2398                         res = drv_add_interface(local, sdata);
2399                         if (WARN_ON(res))
2400                                 break;
2401                 }
2402         }
2403
2404         /* If adding any of the interfaces failed above, roll back and
2405          * report failure.
2406          */
2407         if (res) {
2408                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2409                                                      list)
2410                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2411                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2412                             ieee80211_sdata_running(sdata))
2413                                 drv_remove_interface(local, sdata);
2414                 ieee80211_handle_reconfig_failure(local);
2415                 return res;
2416         }
2417
2418         /* add channel contexts */
2419         if (local->use_chanctx) {
2420                 mutex_lock(&local->chanctx_mtx);
2421                 list_for_each_entry(ctx, &local->chanctx_list, list)
2422                         if (ctx->replace_state !=
2423                             IEEE80211_CHANCTX_REPLACES_OTHER)
2424                                 WARN_ON(drv_add_chanctx(local, ctx));
2425                 mutex_unlock(&local->chanctx_mtx);
2426
2427                 sdata = rtnl_dereference(local->monitor_sdata);
2428                 if (sdata && ieee80211_sdata_running(sdata))
2429                         ieee80211_assign_chanctx(local, sdata);
2430         }
2431
2432         /* reconfigure hardware */
2433         ieee80211_hw_config(local, ~0);
2434
2435         ieee80211_configure_filter(local);
2436
2437         /* Finally also reconfigure all the BSS information */
2438         list_for_each_entry(sdata, &local->interfaces, list) {
2439                 u32 changed;
2440
2441                 if (!ieee80211_sdata_running(sdata))
2442                         continue;
2443
2444                 ieee80211_assign_chanctx(local, sdata);
2445
2446                 switch (sdata->vif.type) {
2447                 case NL80211_IFTYPE_AP_VLAN:
2448                 case NL80211_IFTYPE_MONITOR:
2449                         break;
2450                 case NL80211_IFTYPE_ADHOC:
2451                         if (sdata->vif.bss_conf.ibss_joined)
2452                                 WARN_ON(drv_join_ibss(local, sdata));
2453                         fallthrough;
2454                 default:
2455                         ieee80211_reconfig_stations(sdata);
2456                         fallthrough;
2457                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2458                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2459                                 drv_conf_tx(local, sdata, i,
2460                                             &sdata->tx_conf[i]);
2461                         break;
2462                 }
2463
2464                 /* common change flags for all interface types */
2465                 changed = BSS_CHANGED_ERP_CTS_PROT |
2466                           BSS_CHANGED_ERP_PREAMBLE |
2467                           BSS_CHANGED_ERP_SLOT |
2468                           BSS_CHANGED_HT |
2469                           BSS_CHANGED_BASIC_RATES |
2470                           BSS_CHANGED_BEACON_INT |
2471                           BSS_CHANGED_BSSID |
2472                           BSS_CHANGED_CQM |
2473                           BSS_CHANGED_QOS |
2474                           BSS_CHANGED_IDLE |
2475                           BSS_CHANGED_TXPOWER |
2476                           BSS_CHANGED_MCAST_RATE;
2477
2478                 if (sdata->vif.mu_mimo_owner)
2479                         changed |= BSS_CHANGED_MU_GROUPS;
2480
2481                 switch (sdata->vif.type) {
2482                 case NL80211_IFTYPE_STATION:
2483                         changed |= BSS_CHANGED_ASSOC |
2484                                    BSS_CHANGED_ARP_FILTER |
2485                                    BSS_CHANGED_PS;
2486
2487                         /* Re-send beacon info report to the driver */
2488                         if (sdata->u.mgd.have_beacon)
2489                                 changed |= BSS_CHANGED_BEACON_INFO;
2490
2491                         if (sdata->vif.bss_conf.max_idle_period ||
2492                             sdata->vif.bss_conf.protected_keep_alive)
2493                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2494
2495                         sdata_lock(sdata);
2496                         ieee80211_bss_info_change_notify(sdata, changed);
2497                         sdata_unlock(sdata);
2498                         break;
2499                 case NL80211_IFTYPE_OCB:
2500                         changed |= BSS_CHANGED_OCB;
2501                         ieee80211_bss_info_change_notify(sdata, changed);
2502                         break;
2503                 case NL80211_IFTYPE_ADHOC:
2504                         changed |= BSS_CHANGED_IBSS;
2505                         fallthrough;
2506                 case NL80211_IFTYPE_AP:
2507                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2508
2509                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2510                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2511                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2512                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2513
2514                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2515                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2516
2517                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2518                                         drv_start_ap(local, sdata);
2519                         }
2520                         fallthrough;
2521                 case NL80211_IFTYPE_MESH_POINT:
2522                         if (sdata->vif.bss_conf.enable_beacon) {
2523                                 changed |= BSS_CHANGED_BEACON |
2524                                            BSS_CHANGED_BEACON_ENABLED;
2525                                 ieee80211_bss_info_change_notify(sdata, changed);
2526                         }
2527                         break;
2528                 case NL80211_IFTYPE_NAN:
2529                         res = ieee80211_reconfig_nan(sdata);
2530                         if (res < 0) {
2531                                 ieee80211_handle_reconfig_failure(local);
2532                                 return res;
2533                         }
2534                         break;
2535                 case NL80211_IFTYPE_AP_VLAN:
2536                 case NL80211_IFTYPE_MONITOR:
2537                 case NL80211_IFTYPE_P2P_DEVICE:
2538                         /* nothing to do */
2539                         break;
2540                 case NL80211_IFTYPE_UNSPECIFIED:
2541                 case NUM_NL80211_IFTYPES:
2542                 case NL80211_IFTYPE_P2P_CLIENT:
2543                 case NL80211_IFTYPE_P2P_GO:
2544                 case NL80211_IFTYPE_WDS:
2545                         WARN_ON(1);
2546                         break;
2547                 }
2548         }
2549
2550         ieee80211_recalc_ps(local);
2551
2552         /*
2553          * The sta might be in psm against the ap (e.g. because
2554          * this was the state before a hw restart), so we
2555          * explicitly send a null packet in order to make sure
2556          * it'll sync against the ap (and get out of psm).
2557          */
2558         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2559                 list_for_each_entry(sdata, &local->interfaces, list) {
2560                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2561                                 continue;
2562                         if (!sdata->u.mgd.associated)
2563                                 continue;
2564
2565                         ieee80211_send_nullfunc(local, sdata, false);
2566                 }
2567         }
2568
2569         /* APs are now beaconing, add back stations */
2570         mutex_lock(&local->sta_mtx);
2571         list_for_each_entry(sta, &local->sta_list, list) {
2572                 enum ieee80211_sta_state state;
2573
2574                 if (!sta->uploaded)
2575                         continue;
2576
2577                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2578                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2579                         continue;
2580
2581                 for (state = IEEE80211_STA_NOTEXIST;
2582                      state < sta->sta_state; state++)
2583                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2584                                               state + 1));
2585         }
2586         mutex_unlock(&local->sta_mtx);
2587
2588         /* add back keys */
2589         list_for_each_entry(sdata, &local->interfaces, list)
2590                 ieee80211_reenable_keys(sdata);
2591
2592         /* Reconfigure sched scan if it was interrupted by FW restart */
2593         mutex_lock(&local->mtx);
2594         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2595                                                 lockdep_is_held(&local->mtx));
2596         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2597                                                 lockdep_is_held(&local->mtx));
2598         if (sched_scan_sdata && sched_scan_req)
2599                 /*
2600                  * Sched scan stopped, but we don't want to report it. Instead,
2601                  * we're trying to reschedule. However, if more than one scan
2602                  * plan was set, we cannot reschedule since we don't know which
2603                  * scan plan was currently running (and some scan plans may have
2604                  * already finished).
2605                  */
2606                 if (sched_scan_req->n_scan_plans > 1 ||
2607                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2608                                                          sched_scan_req)) {
2609                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2610                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2611                         sched_scan_stopped = true;
2612                 }
2613         mutex_unlock(&local->mtx);
2614
2615         if (sched_scan_stopped)
2616                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2617
2618  wake_up:
2619
2620         if (local->monitors == local->open_count && local->monitors > 0)
2621                 ieee80211_add_virtual_monitor(local);
2622
2623         /*
2624          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2625          * sessions can be established after a resume.
2626          *
2627          * Also tear down aggregation sessions since reconfiguring
2628          * them in a hardware restart scenario is not easily done
2629          * right now, and the hardware will have lost information
2630          * about the sessions, but we and the AP still think they
2631          * are active. This is really a workaround though.
2632          */
2633         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2634                 mutex_lock(&local->sta_mtx);
2635
2636                 list_for_each_entry(sta, &local->sta_list, list) {
2637                         if (!local->resuming)
2638                                 ieee80211_sta_tear_down_BA_sessions(
2639                                                 sta, AGG_STOP_LOCAL_REQUEST);
2640                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2641                 }
2642
2643                 mutex_unlock(&local->sta_mtx);
2644         }
2645
2646         if (local->in_reconfig) {
2647                 local->in_reconfig = false;
2648                 barrier();
2649
2650                 /* Restart deferred ROCs */
2651                 mutex_lock(&local->mtx);
2652                 ieee80211_start_next_roc(local);
2653                 mutex_unlock(&local->mtx);
2654
2655                 /* Requeue all works */
2656                 list_for_each_entry(sdata, &local->interfaces, list)
2657                         ieee80211_queue_work(&local->hw, &sdata->work);
2658         }
2659
2660         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2661                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2662                                         false);
2663
2664         /*
2665          * If this is for hw restart things are still running.
2666          * We may want to change that later, however.
2667          */
2668         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2669                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2670
2671         if (!suspended)
2672                 return 0;
2673
2674 #ifdef CONFIG_PM
2675         /* first set suspended false, then resuming */
2676         local->suspended = false;
2677         mb();
2678         local->resuming = false;
2679
2680         ieee80211_flush_completed_scan(local, false);
2681
2682         if (local->open_count && !reconfig_due_to_wowlan)
2683                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2684
2685         list_for_each_entry(sdata, &local->interfaces, list) {
2686                 if (!ieee80211_sdata_running(sdata))
2687                         continue;
2688                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2689                         ieee80211_sta_restart(sdata);
2690         }
2691
2692         mod_timer(&local->sta_cleanup, jiffies + 1);
2693 #else
2694         WARN_ON(1);
2695 #endif
2696
2697         return 0;
2698 }
2699
2700 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2701 {
2702         struct ieee80211_sub_if_data *sdata;
2703         struct ieee80211_local *local;
2704         struct ieee80211_key *key;
2705
2706         if (WARN_ON(!vif))
2707                 return;
2708
2709         sdata = vif_to_sdata(vif);
2710         local = sdata->local;
2711
2712         if (WARN_ON(!local->resuming))
2713                 return;
2714
2715         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2716                 return;
2717
2718         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2719
2720         mutex_lock(&local->key_mtx);
2721         list_for_each_entry(key, &sdata->key_list, list)
2722                 key->flags |= KEY_FLAG_TAINTED;
2723         mutex_unlock(&local->key_mtx);
2724 }
2725 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2726
2727 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2728 {
2729         struct ieee80211_local *local = sdata->local;
2730         struct ieee80211_chanctx_conf *chanctx_conf;
2731         struct ieee80211_chanctx *chanctx;
2732
2733         mutex_lock(&local->chanctx_mtx);
2734
2735         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2736                                         lockdep_is_held(&local->chanctx_mtx));
2737
2738         /*
2739          * This function can be called from a work, thus it may be possible
2740          * that the chanctx_conf is removed (due to a disconnection, for
2741          * example).
2742          * So nothing should be done in such case.
2743          */
2744         if (!chanctx_conf)
2745                 goto unlock;
2746
2747         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2748         ieee80211_recalc_smps_chanctx(local, chanctx);
2749  unlock:
2750         mutex_unlock(&local->chanctx_mtx);
2751 }
2752
2753 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2754 {
2755         struct ieee80211_local *local = sdata->local;
2756         struct ieee80211_chanctx_conf *chanctx_conf;
2757         struct ieee80211_chanctx *chanctx;
2758
2759         mutex_lock(&local->chanctx_mtx);
2760
2761         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2762                                         lockdep_is_held(&local->chanctx_mtx));
2763
2764         if (WARN_ON_ONCE(!chanctx_conf))
2765                 goto unlock;
2766
2767         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2768         ieee80211_recalc_chanctx_min_def(local, chanctx);
2769  unlock:
2770         mutex_unlock(&local->chanctx_mtx);
2771 }
2772
2773 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2774 {
2775         size_t pos = offset;
2776
2777         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2778                 pos += 2 + ies[pos + 1];
2779
2780         return pos;
2781 }
2782
2783 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2784                                             int rssi_min_thold,
2785                                             int rssi_max_thold)
2786 {
2787         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2788
2789         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2790                 return;
2791
2792         /*
2793          * Scale up threshold values before storing it, as the RSSI averaging
2794          * algorithm uses a scaled up value as well. Change this scaling
2795          * factor if the RSSI averaging algorithm changes.
2796          */
2797         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2798         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2799 }
2800
2801 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2802                                     int rssi_min_thold,
2803                                     int rssi_max_thold)
2804 {
2805         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2806
2807         WARN_ON(rssi_min_thold == rssi_max_thold ||
2808                 rssi_min_thold > rssi_max_thold);
2809
2810         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2811                                        rssi_max_thold);
2812 }
2813 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2814
2815 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2816 {
2817         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2818
2819         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2820 }
2821 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2822
2823 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2824                               u16 cap)
2825 {
2826         __le16 tmp;
2827
2828         *pos++ = WLAN_EID_HT_CAPABILITY;
2829         *pos++ = sizeof(struct ieee80211_ht_cap);
2830         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2831
2832         /* capability flags */
2833         tmp = cpu_to_le16(cap);
2834         memcpy(pos, &tmp, sizeof(u16));
2835         pos += sizeof(u16);
2836
2837         /* AMPDU parameters */
2838         *pos++ = ht_cap->ampdu_factor |
2839                  (ht_cap->ampdu_density <<
2840                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2841
2842         /* MCS set */
2843         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2844         pos += sizeof(ht_cap->mcs);
2845
2846         /* extended capabilities */
2847         pos += sizeof(__le16);
2848
2849         /* BF capabilities */
2850         pos += sizeof(__le32);
2851
2852         /* antenna selection */
2853         pos += sizeof(u8);
2854
2855         return pos;
2856 }
2857
2858 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2859                                u32 cap)
2860 {
2861         __le32 tmp;
2862
2863         *pos++ = WLAN_EID_VHT_CAPABILITY;
2864         *pos++ = sizeof(struct ieee80211_vht_cap);
2865         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2866
2867         /* capability flags */
2868         tmp = cpu_to_le32(cap);
2869         memcpy(pos, &tmp, sizeof(u32));
2870         pos += sizeof(u32);
2871
2872         /* VHT MCS set */
2873         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2874         pos += sizeof(vht_cap->vht_mcs);
2875
2876         return pos;
2877 }
2878
2879 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2880 {
2881         const struct ieee80211_sta_he_cap *he_cap;
2882         struct ieee80211_supported_band *sband;
2883         u8 n;
2884
2885         sband = ieee80211_get_sband(sdata);
2886         if (!sband)
2887                 return 0;
2888
2889         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2890         if (!he_cap)
2891                 return 0;
2892
2893         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2894         return 2 + 1 +
2895                sizeof(he_cap->he_cap_elem) + n +
2896                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2897                                      he_cap->he_cap_elem.phy_cap_info);
2898 }
2899
2900 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2901                               const struct ieee80211_sta_he_cap *he_cap,
2902                               u8 *end)
2903 {
2904         u8 n;
2905         u8 ie_len;
2906         u8 *orig_pos = pos;
2907
2908         /* Make sure we have place for the IE */
2909         /*
2910          * TODO: the 1 added is because this temporarily is under the EXTENSION
2911          * IE. Get rid of it when it moves.
2912          */
2913         if (!he_cap)
2914                 return orig_pos;
2915
2916         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2917         ie_len = 2 + 1 +
2918                  sizeof(he_cap->he_cap_elem) + n +
2919                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2920                                        he_cap->he_cap_elem.phy_cap_info);
2921
2922         if ((end - pos) < ie_len)
2923                 return orig_pos;
2924
2925         *pos++ = WLAN_EID_EXTENSION;
2926         pos++; /* We'll set the size later below */
2927         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2928
2929         /* Fixed data */
2930         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2931         pos += sizeof(he_cap->he_cap_elem);
2932
2933         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2934         pos += n;
2935
2936         /* Check if PPE Threshold should be present */
2937         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2938              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2939                 goto end;
2940
2941         /*
2942          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2943          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2944          */
2945         n = hweight8(he_cap->ppe_thres[0] &
2946                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2947         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2948                    IEEE80211_PPE_THRES_NSS_POS));
2949
2950         /*
2951          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2952          * total size.
2953          */
2954         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2955         n = DIV_ROUND_UP(n, 8);
2956
2957         /* Copy PPE Thresholds */
2958         memcpy(pos, &he_cap->ppe_thres, n);
2959         pos += n;
2960
2961 end:
2962         orig_pos[1] = (pos - orig_pos) - 2;
2963         return pos;
2964 }
2965
2966 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2967                                     struct sk_buff *skb)
2968 {
2969         struct ieee80211_supported_band *sband;
2970         const struct ieee80211_sband_iftype_data *iftd;
2971         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2972         u8 *pos;
2973         u16 cap;
2974
2975         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2976                                           BIT(NL80211_BAND_6GHZ),
2977                                           IEEE80211_CHAN_NO_HE))
2978                 return;
2979
2980         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2981
2982         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2983         if (!iftd)
2984                 return;
2985
2986         /* Check for device HE 6 GHz capability before adding element */
2987         if (!iftd->he_6ghz_capa.capa)
2988                 return;
2989
2990         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2991         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2992
2993         switch (sdata->smps_mode) {
2994         case IEEE80211_SMPS_AUTOMATIC:
2995         case IEEE80211_SMPS_NUM_MODES:
2996                 WARN_ON(1);
2997                 fallthrough;
2998         case IEEE80211_SMPS_OFF:
2999                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3000                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3001                 break;
3002         case IEEE80211_SMPS_STATIC:
3003                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3004                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3005                 break;
3006         case IEEE80211_SMPS_DYNAMIC:
3007                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3008                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3009                 break;
3010         }
3011
3012         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3013         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3014                                     pos + 2 + 1 + sizeof(cap));
3015 }
3016
3017 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3018                                const struct cfg80211_chan_def *chandef,
3019                                u16 prot_mode, bool rifs_mode)
3020 {
3021         struct ieee80211_ht_operation *ht_oper;
3022         /* Build HT Information */
3023         *pos++ = WLAN_EID_HT_OPERATION;
3024         *pos++ = sizeof(struct ieee80211_ht_operation);
3025         ht_oper = (struct ieee80211_ht_operation *)pos;
3026         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3027                                         chandef->chan->center_freq);
3028         switch (chandef->width) {
3029         case NL80211_CHAN_WIDTH_160:
3030         case NL80211_CHAN_WIDTH_80P80:
3031         case NL80211_CHAN_WIDTH_80:
3032         case NL80211_CHAN_WIDTH_40:
3033                 if (chandef->center_freq1 > chandef->chan->center_freq)
3034                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3035                 else
3036                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3037                 break;
3038         default:
3039                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3040                 break;
3041         }
3042         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3043             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3044             chandef->width != NL80211_CHAN_WIDTH_20)
3045                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3046
3047         if (rifs_mode)
3048                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3049
3050         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3051         ht_oper->stbc_param = 0x0000;
3052
3053         /* It seems that Basic MCS set and Supported MCS set
3054            are identical for the first 10 bytes */
3055         memset(&ht_oper->basic_set, 0, 16);
3056         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3057
3058         return pos + sizeof(struct ieee80211_ht_operation);
3059 }
3060
3061 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3062                                    const struct cfg80211_chan_def *chandef)
3063 {
3064         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3065         *pos++ = 3;                                     /* IE length */
3066         /* New channel width */
3067         switch (chandef->width) {
3068         case NL80211_CHAN_WIDTH_80:
3069                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3070                 break;
3071         case NL80211_CHAN_WIDTH_160:
3072                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3073                 break;
3074         case NL80211_CHAN_WIDTH_80P80:
3075                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3076                 break;
3077         default:
3078                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3079         }
3080
3081         /* new center frequency segment 0 */
3082         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3083         /* new center frequency segment 1 */
3084         if (chandef->center_freq2)
3085                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3086         else
3087                 *pos++ = 0;
3088 }
3089
3090 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3091                                 const struct cfg80211_chan_def *chandef)
3092 {
3093         struct ieee80211_vht_operation *vht_oper;
3094
3095         *pos++ = WLAN_EID_VHT_OPERATION;
3096         *pos++ = sizeof(struct ieee80211_vht_operation);
3097         vht_oper = (struct ieee80211_vht_operation *)pos;
3098         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3099                                                         chandef->center_freq1);
3100         if (chandef->center_freq2)
3101                 vht_oper->center_freq_seg1_idx =
3102                         ieee80211_frequency_to_channel(chandef->center_freq2);
3103         else
3104                 vht_oper->center_freq_seg1_idx = 0x00;
3105
3106         switch (chandef->width) {
3107         case NL80211_CHAN_WIDTH_160:
3108                 /*
3109                  * Convert 160 MHz channel width to new style as interop
3110                  * workaround.
3111                  */
3112                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3113                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3114                 if (chandef->chan->center_freq < chandef->center_freq1)
3115                         vht_oper->center_freq_seg0_idx -= 8;
3116                 else
3117                         vht_oper->center_freq_seg0_idx += 8;
3118                 break;
3119         case NL80211_CHAN_WIDTH_80P80:
3120                 /*
3121                  * Convert 80+80 MHz channel width to new style as interop
3122                  * workaround.
3123                  */
3124                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3125                 break;
3126         case NL80211_CHAN_WIDTH_80:
3127                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3128                 break;
3129         default:
3130                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3131                 break;
3132         }
3133
3134         /* don't require special VHT peer rates */
3135         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3136
3137         return pos + sizeof(struct ieee80211_vht_operation);
3138 }
3139
3140 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3141 {
3142         struct ieee80211_he_operation *he_oper;
3143         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3144         u32 he_oper_params;
3145         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3146
3147         if (chandef->chan->band == NL80211_BAND_6GHZ)
3148                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3149
3150         *pos++ = WLAN_EID_EXTENSION;
3151         *pos++ = ie_len;
3152         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3153
3154         he_oper_params = 0;
3155         he_oper_params |= u32_encode_bits(1023, /* disabled */
3156                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3157         he_oper_params |= u32_encode_bits(1,
3158                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3159         he_oper_params |= u32_encode_bits(1,
3160                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3161         if (chandef->chan->band == NL80211_BAND_6GHZ)
3162                 he_oper_params |= u32_encode_bits(1,
3163                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3164
3165         he_oper = (struct ieee80211_he_operation *)pos;
3166         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3167
3168         /* don't require special HE peer rates */
3169         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3170         pos += sizeof(struct ieee80211_he_operation);
3171
3172         if (chandef->chan->band != NL80211_BAND_6GHZ)
3173                 goto out;
3174
3175         /* TODO add VHT operational */
3176         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3177         he_6ghz_op->minrate = 6; /* 6 Mbps */
3178         he_6ghz_op->primary =
3179                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3180         he_6ghz_op->ccfs0 =
3181                 ieee80211_frequency_to_channel(chandef->center_freq1);
3182         if (chandef->center_freq2)
3183                 he_6ghz_op->ccfs1 =
3184                         ieee80211_frequency_to_channel(chandef->center_freq2);
3185         else
3186                 he_6ghz_op->ccfs1 = 0;
3187
3188         switch (chandef->width) {
3189         case NL80211_CHAN_WIDTH_160:
3190                 /* Convert 160 MHz channel width to new style as interop
3191                  * workaround.
3192                  */
3193                 he_6ghz_op->control =
3194                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3195                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3196                 if (chandef->chan->center_freq < chandef->center_freq1)
3197                         he_6ghz_op->ccfs0 -= 8;
3198                 else
3199                         he_6ghz_op->ccfs0 += 8;
3200                 fallthrough;
3201         case NL80211_CHAN_WIDTH_80P80:
3202                 he_6ghz_op->control =
3203                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3204                 break;
3205         case NL80211_CHAN_WIDTH_80:
3206                 he_6ghz_op->control =
3207                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3208                 break;
3209         case NL80211_CHAN_WIDTH_40:
3210                 he_6ghz_op->control =
3211                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3212                 break;
3213         default:
3214                 he_6ghz_op->control =
3215                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3216                 break;
3217         }
3218
3219         pos += sizeof(struct ieee80211_he_6ghz_oper);
3220
3221 out:
3222         return pos;
3223 }
3224
3225 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3226                                struct cfg80211_chan_def *chandef)
3227 {
3228         enum nl80211_channel_type channel_type;
3229
3230         if (!ht_oper)
3231                 return false;
3232
3233         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3234         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3235                 channel_type = NL80211_CHAN_HT20;
3236                 break;
3237         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3238                 channel_type = NL80211_CHAN_HT40PLUS;
3239                 break;
3240         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3241                 channel_type = NL80211_CHAN_HT40MINUS;
3242                 break;
3243         default:
3244                 channel_type = NL80211_CHAN_NO_HT;
3245                 return false;
3246         }
3247
3248         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3249         return true;
3250 }
3251
3252 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3253                                 const struct ieee80211_vht_operation *oper,
3254                                 const struct ieee80211_ht_operation *htop,
3255                                 struct cfg80211_chan_def *chandef)
3256 {
3257         struct cfg80211_chan_def new = *chandef;
3258         int cf0, cf1;
3259         int ccfs0, ccfs1, ccfs2;
3260         int ccf0, ccf1;
3261         u32 vht_cap;
3262         bool support_80_80 = false;
3263         bool support_160 = false;
3264         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3265                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3266         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3267                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3268
3269         if (!oper || !htop)
3270                 return false;
3271
3272         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3273         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3274                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3275         support_80_80 = ((vht_cap &
3276                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3277                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3278                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3279                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3280                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3281         ccfs0 = oper->center_freq_seg0_idx;
3282         ccfs1 = oper->center_freq_seg1_idx;
3283         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3284                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3285                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3286
3287         ccf0 = ccfs0;
3288
3289         /* if not supported, parse as though we didn't understand it */
3290         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3291                 ext_nss_bw_supp = 0;
3292
3293         /*
3294          * Cf. IEEE 802.11 Table 9-250
3295          *
3296          * We really just consider that because it's inefficient to connect
3297          * at a higher bandwidth than we'll actually be able to use.
3298          */
3299         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3300         default:
3301         case 0x00:
3302                 ccf1 = 0;
3303                 support_160 = false;
3304                 support_80_80 = false;
3305                 break;
3306         case 0x01:
3307                 support_80_80 = false;
3308                 fallthrough;
3309         case 0x02:
3310         case 0x03:
3311                 ccf1 = ccfs2;
3312                 break;
3313         case 0x10:
3314                 ccf1 = ccfs1;
3315                 break;
3316         case 0x11:
3317         case 0x12:
3318                 if (!ccfs1)
3319                         ccf1 = ccfs2;
3320                 else
3321                         ccf1 = ccfs1;
3322                 break;
3323         case 0x13:
3324         case 0x20:
3325         case 0x23:
3326                 ccf1 = ccfs1;
3327                 break;
3328         }
3329
3330         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3331         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3332
3333         switch (oper->chan_width) {
3334         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3335                 /* just use HT information directly */
3336                 break;
3337         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3338                 new.width = NL80211_CHAN_WIDTH_80;
3339                 new.center_freq1 = cf0;
3340                 /* If needed, adjust based on the newer interop workaround. */
3341                 if (ccf1) {
3342                         unsigned int diff;
3343
3344                         diff = abs(ccf1 - ccf0);
3345                         if ((diff == 8) && support_160) {
3346                                 new.width = NL80211_CHAN_WIDTH_160;
3347                                 new.center_freq1 = cf1;
3348                         } else if ((diff > 8) && support_80_80) {
3349                                 new.width = NL80211_CHAN_WIDTH_80P80;
3350                                 new.center_freq2 = cf1;
3351                         }
3352                 }
3353                 break;
3354         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3355                 /* deprecated encoding */
3356                 new.width = NL80211_CHAN_WIDTH_160;
3357                 new.center_freq1 = cf0;
3358                 break;
3359         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3360                 /* deprecated encoding */
3361                 new.width = NL80211_CHAN_WIDTH_80P80;
3362                 new.center_freq1 = cf0;
3363                 new.center_freq2 = cf1;
3364                 break;
3365         default:
3366                 return false;
3367         }
3368
3369         if (!cfg80211_chandef_valid(&new))
3370                 return false;
3371
3372         *chandef = new;
3373         return true;
3374 }
3375
3376 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3377                                     const struct ieee80211_he_operation *he_oper,
3378                                     struct cfg80211_chan_def *chandef)
3379 {
3380         struct ieee80211_local *local = sdata->local;
3381         struct ieee80211_supported_band *sband;
3382         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3383         const struct ieee80211_sta_he_cap *he_cap;
3384         struct cfg80211_chan_def he_chandef = *chandef;
3385         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3386         bool support_80_80, support_160;
3387         u8 he_phy_cap;
3388         u32 freq;
3389
3390         if (chandef->chan->band != NL80211_BAND_6GHZ)
3391                 return true;
3392
3393         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3394
3395         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3396         if (!he_cap) {
3397                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3398                 return false;
3399         }
3400
3401         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3402         support_160 =
3403                 he_phy_cap &
3404                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3405         support_80_80 =
3406                 he_phy_cap &
3407                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3408
3409         if (!he_oper) {
3410                 sdata_info(sdata,
3411                            "HE is not advertised on (on %d MHz), expect issues\n",
3412                            chandef->chan->center_freq);
3413                 return false;
3414         }
3415
3416         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3417
3418         if (!he_6ghz_oper) {
3419                 sdata_info(sdata,
3420                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3421                            chandef->chan->center_freq);
3422                 return false;
3423         }
3424
3425         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3426                                               NL80211_BAND_6GHZ);
3427         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3428
3429         switch (u8_get_bits(he_6ghz_oper->control,
3430                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3431         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3432                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3433                 break;
3434         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3435                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3436                 break;
3437         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3438                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3439                 break;
3440         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3441                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3442                 if (!he_6ghz_oper->ccfs1)
3443                         break;
3444                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3445                         if (support_160)
3446                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3447                 } else {
3448                         if (support_80_80)
3449                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3450                 }
3451                 break;
3452         }
3453
3454         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3455                 he_chandef.center_freq1 =
3456                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3457                                                        NL80211_BAND_6GHZ);
3458         } else {
3459                 he_chandef.center_freq1 =
3460                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3461                                                        NL80211_BAND_6GHZ);
3462                 if (support_80_80 || support_160)
3463                         he_chandef.center_freq2 =
3464                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3465                                                                NL80211_BAND_6GHZ);
3466         }
3467
3468         if (!cfg80211_chandef_valid(&he_chandef)) {
3469                 sdata_info(sdata,
3470                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3471                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3472                            he_chandef.width,
3473                            he_chandef.center_freq1,
3474                            he_chandef.center_freq2);
3475                 return false;
3476         }
3477
3478         *chandef = he_chandef;
3479
3480         return true;
3481 }
3482
3483 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3484                                 struct cfg80211_chan_def *chandef)
3485 {
3486         u32 oper_freq;
3487
3488         if (!oper)
3489                 return false;
3490
3491         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3492         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3493                 chandef->width = NL80211_CHAN_WIDTH_1;
3494                 break;
3495         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3496                 chandef->width = NL80211_CHAN_WIDTH_2;
3497                 break;
3498         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3499                 chandef->width = NL80211_CHAN_WIDTH_4;
3500                 break;
3501         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3502                 chandef->width = NL80211_CHAN_WIDTH_8;
3503                 break;
3504         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3505                 chandef->width = NL80211_CHAN_WIDTH_16;
3506                 break;
3507         default:
3508                 return false;
3509         }
3510
3511         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3512                                                   NL80211_BAND_S1GHZ);
3513         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3514         chandef->freq1_offset = oper_freq % 1000;
3515
3516         return true;
3517 }
3518
3519 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3520                              const struct ieee80211_supported_band *sband,
3521                              const u8 *srates, int srates_len, u32 *rates)
3522 {
3523         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3524         int shift = ieee80211_chandef_get_shift(chandef);
3525         struct ieee80211_rate *br;
3526         int brate, rate, i, j, count = 0;
3527
3528         *rates = 0;
3529
3530         for (i = 0; i < srates_len; i++) {
3531                 rate = srates[i] & 0x7f;
3532
3533                 for (j = 0; j < sband->n_bitrates; j++) {
3534                         br = &sband->bitrates[j];
3535                         if ((rate_flags & br->flags) != rate_flags)
3536                                 continue;
3537
3538                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3539                         if (brate == rate) {
3540                                 *rates |= BIT(j);
3541                                 count++;
3542                                 break;
3543                         }
3544                 }
3545         }
3546         return count;
3547 }
3548
3549 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3550                             struct sk_buff *skb, bool need_basic,
3551                             enum nl80211_band band)
3552 {
3553         struct ieee80211_local *local = sdata->local;
3554         struct ieee80211_supported_band *sband;
3555         int rate, shift;
3556         u8 i, rates, *pos;
3557         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3558         u32 rate_flags;
3559
3560         shift = ieee80211_vif_get_shift(&sdata->vif);
3561         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3562         sband = local->hw.wiphy->bands[band];
3563         rates = 0;
3564         for (i = 0; i < sband->n_bitrates; i++) {
3565                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3566                         continue;
3567                 rates++;
3568         }
3569         if (rates > 8)
3570                 rates = 8;
3571
3572         if (skb_tailroom(skb) < rates + 2)
3573                 return -ENOMEM;
3574
3575         pos = skb_put(skb, rates + 2);
3576         *pos++ = WLAN_EID_SUPP_RATES;
3577         *pos++ = rates;
3578         for (i = 0; i < rates; i++) {
3579                 u8 basic = 0;
3580                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3581                         continue;
3582
3583                 if (need_basic && basic_rates & BIT(i))
3584                         basic = 0x80;
3585                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3586                                     5 * (1 << shift));
3587                 *pos++ = basic | (u8) rate;
3588         }
3589
3590         return 0;
3591 }
3592
3593 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3594                                 struct sk_buff *skb, bool need_basic,
3595                                 enum nl80211_band band)
3596 {
3597         struct ieee80211_local *local = sdata->local;
3598         struct ieee80211_supported_band *sband;
3599         int rate, shift;
3600         u8 i, exrates, *pos;
3601         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3602         u32 rate_flags;
3603
3604         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3605         shift = ieee80211_vif_get_shift(&sdata->vif);
3606
3607         sband = local->hw.wiphy->bands[band];
3608         exrates = 0;
3609         for (i = 0; i < sband->n_bitrates; i++) {
3610                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3611                         continue;
3612                 exrates++;
3613         }
3614
3615         if (exrates > 8)
3616                 exrates -= 8;
3617         else
3618                 exrates = 0;
3619
3620         if (skb_tailroom(skb) < exrates + 2)
3621                 return -ENOMEM;
3622
3623         if (exrates) {
3624                 pos = skb_put(skb, exrates + 2);
3625                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3626                 *pos++ = exrates;
3627                 for (i = 8; i < sband->n_bitrates; i++) {
3628                         u8 basic = 0;
3629                         if ((rate_flags & sband->bitrates[i].flags)
3630                             != rate_flags)
3631                                 continue;
3632                         if (need_basic && basic_rates & BIT(i))
3633                                 basic = 0x80;
3634                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3635                                             5 * (1 << shift));
3636                         *pos++ = basic | (u8) rate;
3637                 }
3638         }
3639         return 0;
3640 }
3641
3642 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3643 {
3644         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3645         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3646
3647         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3648                 /* non-managed type inferfaces */
3649                 return 0;
3650         }
3651         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3652 }
3653 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3654
3655 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3656 {
3657         if (!mcs)
3658                 return 1;
3659
3660         /* TODO: consider rx_highest */
3661
3662         if (mcs->rx_mask[3])
3663                 return 4;
3664         if (mcs->rx_mask[2])
3665                 return 3;
3666         if (mcs->rx_mask[1])
3667                 return 2;
3668         return 1;
3669 }
3670
3671 /**
3672  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3673  * @local: mac80211 hw info struct
3674  * @status: RX status
3675  * @mpdu_len: total MPDU length (including FCS)
3676  * @mpdu_offset: offset into MPDU to calculate timestamp at
3677  *
3678  * This function calculates the RX timestamp at the given MPDU offset, taking
3679  * into account what the RX timestamp was. An offset of 0 will just normalize
3680  * the timestamp to TSF at beginning of MPDU reception.
3681  */
3682 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3683                                      struct ieee80211_rx_status *status,
3684                                      unsigned int mpdu_len,
3685                                      unsigned int mpdu_offset)
3686 {
3687         u64 ts = status->mactime;
3688         struct rate_info ri;
3689         u16 rate;
3690         u8 n_ltf;
3691
3692         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3693                 return 0;
3694
3695         memset(&ri, 0, sizeof(ri));
3696
3697         ri.bw = status->bw;
3698
3699         /* Fill cfg80211 rate info */
3700         switch (status->encoding) {
3701         case RX_ENC_HE:
3702                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3703                 ri.mcs = status->rate_idx;
3704                 ri.nss = status->nss;
3705                 ri.he_ru_alloc = status->he_ru;
3706                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3707                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3708
3709                 /*
3710                  * See P802.11ax_D6.0, section 27.3.4 for
3711                  * VHT PPDU format.
3712                  */
3713                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3714                         mpdu_offset += 2;
3715                         ts += 36;
3716
3717                         /*
3718                          * TODO:
3719                          * For HE MU PPDU, add the HE-SIG-B.
3720                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3721                          * For HE TB PPDU, add 4us for the HE-STF.
3722                          * Add the HE-LTF durations - variable.
3723                          */
3724                 }
3725
3726                 break;
3727         case RX_ENC_HT:
3728                 ri.mcs = status->rate_idx;
3729                 ri.flags |= RATE_INFO_FLAGS_MCS;
3730                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3731                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3732
3733                 /*
3734                  * See P802.11REVmd_D3.0, section 19.3.2 for
3735                  * HT PPDU format.
3736                  */
3737                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3738                         mpdu_offset += 2;
3739                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3740                                 ts += 24;
3741                         else
3742                                 ts += 32;
3743
3744                         /*
3745                          * Add Data HT-LTFs per streams
3746                          * TODO: add Extension HT-LTFs, 4us per LTF
3747                          */
3748                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3749                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3750                         ts += n_ltf * 4;
3751                 }
3752
3753                 break;
3754         case RX_ENC_VHT:
3755                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3756                 ri.mcs = status->rate_idx;
3757                 ri.nss = status->nss;
3758                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3759                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3760
3761                 /*
3762                  * See P802.11REVmd_D3.0, section 21.3.2 for
3763                  * VHT PPDU format.
3764                  */
3765                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3766                         mpdu_offset += 2;
3767                         ts += 36;
3768
3769                         /*
3770                          * Add VHT-LTFs per streams
3771                          */
3772                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3773                                 ri.nss + 1 : ri.nss;
3774                         ts += 4 * n_ltf;
3775                 }
3776
3777                 break;
3778         default:
3779                 WARN_ON(1);
3780                 fallthrough;
3781         case RX_ENC_LEGACY: {
3782                 struct ieee80211_supported_band *sband;
3783                 int shift = 0;
3784                 int bitrate;
3785
3786                 switch (status->bw) {
3787                 case RATE_INFO_BW_10:
3788                         shift = 1;
3789                         break;
3790                 case RATE_INFO_BW_5:
3791                         shift = 2;
3792                         break;
3793                 }
3794
3795                 sband = local->hw.wiphy->bands[status->band];
3796                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3797                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3798
3799                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3800                         if (status->band == NL80211_BAND_5GHZ) {
3801                                 ts += 20 << shift;
3802                                 mpdu_offset += 2;
3803                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3804                                 ts += 96;
3805                         } else {
3806                                 ts += 192;
3807                         }
3808                 }
3809                 break;
3810                 }
3811         }
3812
3813         rate = cfg80211_calculate_bitrate(&ri);
3814         if (WARN_ONCE(!rate,
3815                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3816                       (unsigned long long)status->flag, status->rate_idx,
3817                       status->nss))
3818                 return 0;
3819
3820         /* rewind from end of MPDU */
3821         if (status->flag & RX_FLAG_MACTIME_END)
3822                 ts -= mpdu_len * 8 * 10 / rate;
3823
3824         ts += mpdu_offset * 8 * 10 / rate;
3825
3826         return ts;
3827 }
3828
3829 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3830 {
3831         struct ieee80211_sub_if_data *sdata;
3832         struct cfg80211_chan_def chandef;
3833
3834         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3835         lockdep_assert_wiphy(local->hw.wiphy);
3836
3837         mutex_lock(&local->mtx);
3838         list_for_each_entry(sdata, &local->interfaces, list) {
3839                 /* it might be waiting for the local->mtx, but then
3840                  * by the time it gets it, sdata->wdev.cac_started
3841                  * will no longer be true
3842                  */
3843                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3844
3845                 if (sdata->wdev.cac_started) {
3846                         chandef = sdata->vif.bss_conf.chandef;
3847                         ieee80211_vif_release_channel(sdata);
3848                         cfg80211_cac_event(sdata->dev,
3849                                            &chandef,
3850                                            NL80211_RADAR_CAC_ABORTED,
3851                                            GFP_KERNEL);
3852                 }
3853         }
3854         mutex_unlock(&local->mtx);
3855 }
3856
3857 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3858 {
3859         struct ieee80211_local *local =
3860                 container_of(work, struct ieee80211_local, radar_detected_work);
3861         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3862         struct ieee80211_chanctx *ctx;
3863         int num_chanctx = 0;
3864
3865         mutex_lock(&local->chanctx_mtx);
3866         list_for_each_entry(ctx, &local->chanctx_list, list) {
3867                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3868                         continue;
3869
3870                 num_chanctx++;
3871                 chandef = ctx->conf.def;
3872         }
3873         mutex_unlock(&local->chanctx_mtx);
3874
3875         wiphy_lock(local->hw.wiphy);
3876         ieee80211_dfs_cac_cancel(local);
3877         wiphy_unlock(local->hw.wiphy);
3878
3879         if (num_chanctx > 1)
3880                 /* XXX: multi-channel is not supported yet */
3881                 WARN_ON(1);
3882         else
3883                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3884 }
3885
3886 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3887 {
3888         struct ieee80211_local *local = hw_to_local(hw);
3889
3890         trace_api_radar_detected(local);
3891
3892         schedule_work(&local->radar_detected_work);
3893 }
3894 EXPORT_SYMBOL(ieee80211_radar_detected);
3895
3896 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3897 {
3898         u32 ret;
3899         int tmp;
3900
3901         switch (c->width) {
3902         case NL80211_CHAN_WIDTH_20:
3903                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3904                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3905                 break;
3906         case NL80211_CHAN_WIDTH_40:
3907                 c->width = NL80211_CHAN_WIDTH_20;
3908                 c->center_freq1 = c->chan->center_freq;
3909                 ret = IEEE80211_STA_DISABLE_40MHZ |
3910                       IEEE80211_STA_DISABLE_VHT;
3911                 break;
3912         case NL80211_CHAN_WIDTH_80:
3913                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3914                 /* n_P40 */
3915                 tmp /= 2;
3916                 /* freq_P40 */
3917                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3918                 c->width = NL80211_CHAN_WIDTH_40;
3919                 ret = IEEE80211_STA_DISABLE_VHT;
3920                 break;
3921         case NL80211_CHAN_WIDTH_80P80:
3922                 c->center_freq2 = 0;
3923                 c->width = NL80211_CHAN_WIDTH_80;
3924                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3925                       IEEE80211_STA_DISABLE_160MHZ;
3926                 break;
3927         case NL80211_CHAN_WIDTH_160:
3928                 /* n_P20 */
3929                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3930                 /* n_P80 */
3931                 tmp /= 4;
3932                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3933                 c->width = NL80211_CHAN_WIDTH_80;
3934                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3935                       IEEE80211_STA_DISABLE_160MHZ;
3936                 break;
3937         default:
3938         case NL80211_CHAN_WIDTH_20_NOHT:
3939                 WARN_ON_ONCE(1);
3940                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3941                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3942                 break;
3943         case NL80211_CHAN_WIDTH_1:
3944         case NL80211_CHAN_WIDTH_2:
3945         case NL80211_CHAN_WIDTH_4:
3946         case NL80211_CHAN_WIDTH_8:
3947         case NL80211_CHAN_WIDTH_16:
3948         case NL80211_CHAN_WIDTH_5:
3949         case NL80211_CHAN_WIDTH_10:
3950                 WARN_ON_ONCE(1);
3951                 /* keep c->width */
3952                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3953                 break;
3954         }
3955
3956         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3957
3958         return ret;
3959 }
3960
3961 /*
3962  * Returns true if smps_mode_new is strictly more restrictive than
3963  * smps_mode_old.
3964  */
3965 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3966                                    enum ieee80211_smps_mode smps_mode_new)
3967 {
3968         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3969                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3970                 return false;
3971
3972         switch (smps_mode_old) {
3973         case IEEE80211_SMPS_STATIC:
3974                 return false;
3975         case IEEE80211_SMPS_DYNAMIC:
3976                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3977         case IEEE80211_SMPS_OFF:
3978                 return smps_mode_new != IEEE80211_SMPS_OFF;
3979         default:
3980                 WARN_ON(1);
3981         }
3982
3983         return false;
3984 }
3985
3986 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3987                               struct cfg80211_csa_settings *csa_settings)
3988 {
3989         struct sk_buff *skb;
3990         struct ieee80211_mgmt *mgmt;
3991         struct ieee80211_local *local = sdata->local;
3992         int freq;
3993         int hdr_len = offsetofend(struct ieee80211_mgmt,
3994                                   u.action.u.chan_switch);
3995         u8 *pos;
3996
3997         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3998             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3999                 return -EOPNOTSUPP;
4000
4001         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4002                             5 + /* channel switch announcement element */
4003                             3 + /* secondary channel offset element */
4004                             5 + /* wide bandwidth channel switch announcement */
4005                             8); /* mesh channel switch parameters element */
4006         if (!skb)
4007                 return -ENOMEM;
4008
4009         skb_reserve(skb, local->tx_headroom);
4010         mgmt = skb_put_zero(skb, hdr_len);
4011         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4012                                           IEEE80211_STYPE_ACTION);
4013
4014         eth_broadcast_addr(mgmt->da);
4015         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4016         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4017                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4018         } else {
4019                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4020                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4021         }
4022         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4023         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4024         pos = skb_put(skb, 5);
4025         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4026         *pos++ = 3;                                             /* IE length */
4027         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4028         freq = csa_settings->chandef.chan->center_freq;
4029         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4030         *pos++ = csa_settings->count;                           /* count */
4031
4032         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4033                 enum nl80211_channel_type ch_type;
4034
4035                 skb_put(skb, 3);
4036                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4037                 *pos++ = 1;                                     /* IE length */
4038                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4039                 if (ch_type == NL80211_CHAN_HT40PLUS)
4040                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4041                 else
4042                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4043         }
4044
4045         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4046                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4047
4048                 skb_put(skb, 8);
4049                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4050                 *pos++ = 6;                                     /* IE length */
4051                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4052                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4053                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4054                 *pos++ |= csa_settings->block_tx ?
4055                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4056                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4057                 pos += 2;
4058                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4059                 pos += 2;
4060         }
4061
4062         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4063             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4064             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4065                 skb_put(skb, 5);
4066                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4067         }
4068
4069         ieee80211_tx_skb(sdata, skb);
4070         return 0;
4071 }
4072
4073 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4074 {
4075         return !(cs == NULL || cs->cipher == 0 ||
4076                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4077                  cs->hdr_len <= cs->key_idx_off ||
4078                  cs->key_idx_shift > 7 ||
4079                  cs->key_idx_mask == 0);
4080 }
4081
4082 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4083 {
4084         int i;
4085
4086         /* Ensure we have enough iftype bitmap space for all iftype values */
4087         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4088
4089         for (i = 0; i < n; i++)
4090                 if (!ieee80211_cs_valid(&cs[i]))
4091                         return false;
4092
4093         return true;
4094 }
4095
4096 const struct ieee80211_cipher_scheme *
4097 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4098                  enum nl80211_iftype iftype)
4099 {
4100         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4101         int n = local->hw.n_cipher_schemes;
4102         int i;
4103         const struct ieee80211_cipher_scheme *cs = NULL;
4104
4105         for (i = 0; i < n; i++) {
4106                 if (l[i].cipher == cipher) {
4107                         cs = &l[i];
4108                         break;
4109                 }
4110         }
4111
4112         if (!cs || !(cs->iftype & BIT(iftype)))
4113                 return NULL;
4114
4115         return cs;
4116 }
4117
4118 int ieee80211_cs_headroom(struct ieee80211_local *local,
4119                           struct cfg80211_crypto_settings *crypto,
4120                           enum nl80211_iftype iftype)
4121 {
4122         const struct ieee80211_cipher_scheme *cs;
4123         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4124         int i;
4125
4126         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4127                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4128                                       iftype);
4129
4130                 if (cs && headroom < cs->hdr_len)
4131                         headroom = cs->hdr_len;
4132         }
4133
4134         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4135         if (cs && headroom < cs->hdr_len)
4136                 headroom = cs->hdr_len;
4137
4138         return headroom;
4139 }
4140
4141 static bool
4142 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4143 {
4144         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4145         int skip;
4146
4147         if (end > 0)
4148                 return false;
4149
4150         /* One shot NOA  */
4151         if (data->count[i] == 1)
4152                 return false;
4153
4154         if (data->desc[i].interval == 0)
4155                 return false;
4156
4157         /* End time is in the past, check for repetitions */
4158         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4159         if (data->count[i] < 255) {
4160                 if (data->count[i] <= skip) {
4161                         data->count[i] = 0;
4162                         return false;
4163                 }
4164
4165                 data->count[i] -= skip;
4166         }
4167
4168         data->desc[i].start += skip * data->desc[i].interval;
4169
4170         return true;
4171 }
4172
4173 static bool
4174 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4175                              s32 *offset)
4176 {
4177         bool ret = false;
4178         int i;
4179
4180         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4181                 s32 cur;
4182
4183                 if (!data->count[i])
4184                         continue;
4185
4186                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4187                         ret = true;
4188
4189                 cur = data->desc[i].start - tsf;
4190                 if (cur > *offset)
4191                         continue;
4192
4193                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4194                 if (cur > *offset)
4195                         *offset = cur;
4196         }
4197
4198         return ret;
4199 }
4200
4201 static u32
4202 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4203 {
4204         s32 offset = 0;
4205         int tries = 0;
4206         /*
4207          * arbitrary limit, used to avoid infinite loops when combined NoA
4208          * descriptors cover the full time period.
4209          */
4210         int max_tries = 5;
4211
4212         ieee80211_extend_absent_time(data, tsf, &offset);
4213         do {
4214                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4215                         break;
4216
4217                 tries++;
4218         } while (tries < max_tries);
4219
4220         return offset;
4221 }
4222
4223 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4224 {
4225         u32 next_offset = BIT(31) - 1;
4226         int i;
4227
4228         data->absent = 0;
4229         data->has_next_tsf = false;
4230         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4231                 s32 start;
4232
4233                 if (!data->count[i])
4234                         continue;
4235
4236                 ieee80211_extend_noa_desc(data, tsf, i);
4237                 start = data->desc[i].start - tsf;
4238                 if (start <= 0)
4239                         data->absent |= BIT(i);
4240
4241                 if (next_offset > start)
4242                         next_offset = start;
4243
4244                 data->has_next_tsf = true;
4245         }
4246
4247         if (data->absent)
4248                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4249
4250         data->next_tsf = tsf + next_offset;
4251 }
4252 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4253
4254 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4255                             struct ieee80211_noa_data *data, u32 tsf)
4256 {
4257         int ret = 0;
4258         int i;
4259
4260         memset(data, 0, sizeof(*data));
4261
4262         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4263                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4264
4265                 if (!desc->count || !desc->duration)
4266                         continue;
4267
4268                 data->count[i] = desc->count;
4269                 data->desc[i].start = le32_to_cpu(desc->start_time);
4270                 data->desc[i].duration = le32_to_cpu(desc->duration);
4271                 data->desc[i].interval = le32_to_cpu(desc->interval);
4272
4273                 if (data->count[i] > 1 &&
4274                     data->desc[i].interval < data->desc[i].duration)
4275                         continue;
4276
4277                 ieee80211_extend_noa_desc(data, tsf, i);
4278                 ret++;
4279         }
4280
4281         if (ret)
4282                 ieee80211_update_p2p_noa(data, tsf);
4283
4284         return ret;
4285 }
4286 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4287
4288 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4289                            struct ieee80211_sub_if_data *sdata)
4290 {
4291         u64 tsf = drv_get_tsf(local, sdata);
4292         u64 dtim_count = 0;
4293         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4294         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4295         struct ps_data *ps;
4296         u8 bcns_from_dtim;
4297
4298         if (tsf == -1ULL || !beacon_int || !dtim_period)
4299                 return;
4300
4301         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4302             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4303                 if (!sdata->bss)
4304                         return;
4305
4306                 ps = &sdata->bss->ps;
4307         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4308                 ps = &sdata->u.mesh.ps;
4309         } else {
4310                 return;
4311         }
4312
4313         /*
4314          * actually finds last dtim_count, mac80211 will update in
4315          * __beacon_add_tim().
4316          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4317          */
4318         do_div(tsf, beacon_int);
4319         bcns_from_dtim = do_div(tsf, dtim_period);
4320         /* just had a DTIM */
4321         if (!bcns_from_dtim)
4322                 dtim_count = 0;
4323         else
4324                 dtim_count = dtim_period - bcns_from_dtim;
4325
4326         ps->dtim_count = dtim_count;
4327 }
4328
4329 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4330                                          struct ieee80211_chanctx *ctx)
4331 {
4332         struct ieee80211_sub_if_data *sdata;
4333         u8 radar_detect = 0;
4334
4335         lockdep_assert_held(&local->chanctx_mtx);
4336
4337         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4338                 return 0;
4339
4340         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4341                 if (sdata->reserved_radar_required)
4342                         radar_detect |= BIT(sdata->reserved_chandef.width);
4343
4344         /*
4345          * An in-place reservation context should not have any assigned vifs
4346          * until it replaces the other context.
4347          */
4348         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4349                 !list_empty(&ctx->assigned_vifs));
4350
4351         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4352                 if (sdata->radar_required)
4353                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4354
4355         return radar_detect;
4356 }
4357
4358 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4359                                  const struct cfg80211_chan_def *chandef,
4360                                  enum ieee80211_chanctx_mode chanmode,
4361                                  u8 radar_detect)
4362 {
4363         struct ieee80211_local *local = sdata->local;
4364         struct ieee80211_sub_if_data *sdata_iter;
4365         enum nl80211_iftype iftype = sdata->wdev.iftype;
4366         struct ieee80211_chanctx *ctx;
4367         int total = 1;
4368         struct iface_combination_params params = {
4369                 .radar_detect = radar_detect,
4370         };
4371
4372         lockdep_assert_held(&local->chanctx_mtx);
4373
4374         if (WARN_ON(hweight32(radar_detect) > 1))
4375                 return -EINVAL;
4376
4377         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4378                     !chandef->chan))
4379                 return -EINVAL;
4380
4381         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4382                 return -EINVAL;
4383
4384         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4385             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4386                 /*
4387                  * always passing this is harmless, since it'll be the
4388                  * same value that cfg80211 finds if it finds the same
4389                  * interface ... and that's always allowed
4390                  */
4391                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4392         }
4393
4394         /* Always allow software iftypes */
4395         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4396                 if (radar_detect)
4397                         return -EINVAL;
4398                 return 0;
4399         }
4400
4401         if (chandef)
4402                 params.num_different_channels = 1;
4403
4404         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4405                 params.iftype_num[iftype] = 1;
4406
4407         list_for_each_entry(ctx, &local->chanctx_list, list) {
4408                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4409                         continue;
4410                 params.radar_detect |=
4411                         ieee80211_chanctx_radar_detect(local, ctx);
4412                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4413                         params.num_different_channels++;
4414                         continue;
4415                 }
4416                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4417                     cfg80211_chandef_compatible(chandef,
4418                                                 &ctx->conf.def))
4419                         continue;
4420                 params.num_different_channels++;
4421         }
4422
4423         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4424                 struct wireless_dev *wdev_iter;
4425
4426                 wdev_iter = &sdata_iter->wdev;
4427
4428                 if (sdata_iter == sdata ||
4429                     !ieee80211_sdata_running(sdata_iter) ||
4430                     cfg80211_iftype_allowed(local->hw.wiphy,
4431                                             wdev_iter->iftype, 0, 1))
4432                         continue;
4433
4434                 params.iftype_num[wdev_iter->iftype]++;
4435                 total++;
4436         }
4437
4438         if (total == 1 && !params.radar_detect)
4439                 return 0;
4440
4441         return cfg80211_check_combinations(local->hw.wiphy, &params);
4442 }
4443
4444 static void
4445 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4446                          void *data)
4447 {
4448         u32 *max_num_different_channels = data;
4449
4450         *max_num_different_channels = max(*max_num_different_channels,
4451                                           c->num_different_channels);
4452 }
4453
4454 int ieee80211_max_num_channels(struct ieee80211_local *local)
4455 {
4456         struct ieee80211_sub_if_data *sdata;
4457         struct ieee80211_chanctx *ctx;
4458         u32 max_num_different_channels = 1;
4459         int err;
4460         struct iface_combination_params params = {0};
4461
4462         lockdep_assert_held(&local->chanctx_mtx);
4463
4464         list_for_each_entry(ctx, &local->chanctx_list, list) {
4465                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4466                         continue;
4467
4468                 params.num_different_channels++;
4469
4470                 params.radar_detect |=
4471                         ieee80211_chanctx_radar_detect(local, ctx);
4472         }
4473
4474         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4475                 params.iftype_num[sdata->wdev.iftype]++;
4476
4477         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4478                                          ieee80211_iter_max_chans,
4479                                          &max_num_different_channels);
4480         if (err < 0)
4481                 return err;
4482
4483         return max_num_different_channels;
4484 }
4485
4486 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4487                                 struct ieee80211_sta_s1g_cap *caps,
4488                                 struct sk_buff *skb)
4489 {
4490         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4491         struct ieee80211_s1g_cap s1g_capab;
4492         u8 *pos;
4493         int i;
4494
4495         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4496                 return;
4497
4498         if (!caps->s1g)
4499                 return;
4500
4501         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4502         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4503
4504         /* override the capability info */
4505         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4506                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4507
4508                 s1g_capab.capab_info[i] &= ~mask;
4509                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4510         }
4511
4512         /* then MCS and NSS set */
4513         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4514                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4515
4516                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4517                 s1g_capab.supp_mcs_nss[i] |=
4518                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4519         }
4520
4521         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4522         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4523         *pos++ = sizeof(s1g_capab);
4524
4525         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4526 }
4527
4528 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4529                                   struct sk_buff *skb)
4530 {
4531         u8 *pos = skb_put(skb, 3);
4532
4533         *pos++ = WLAN_EID_AID_REQUEST;
4534         *pos++ = 1;
4535         *pos++ = 0;
4536 }
4537
4538 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4539 {
4540         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4541         *buf++ = 7; /* len */
4542         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4543         *buf++ = 0x50;
4544         *buf++ = 0xf2;
4545         *buf++ = 2; /* WME */
4546         *buf++ = 0; /* WME info */
4547         *buf++ = 1; /* WME ver */
4548         *buf++ = qosinfo; /* U-APSD no in use */
4549
4550         return buf;
4551 }
4552
4553 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4554                              unsigned long *frame_cnt,
4555                              unsigned long *byte_cnt)
4556 {
4557         struct txq_info *txqi = to_txq_info(txq);
4558         u32 frag_cnt = 0, frag_bytes = 0;
4559         struct sk_buff *skb;
4560
4561         skb_queue_walk(&txqi->frags, skb) {
4562                 frag_cnt++;
4563                 frag_bytes += skb->len;
4564         }
4565
4566         if (frame_cnt)
4567                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4568
4569         if (byte_cnt)
4570                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4571 }
4572 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4573
4574 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4575         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4576         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4577         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4578         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4579 };
4580
4581 u16 ieee80211_encode_usf(int listen_interval)
4582 {
4583         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4584         u16 ui, usf = 0;
4585
4586         /* find greatest USF */
4587         while (usf < IEEE80211_MAX_USF) {
4588                 if (listen_interval % listen_int_usf[usf + 1])
4589                         break;
4590                 usf += 1;
4591         }
4592         ui = listen_interval / listen_int_usf[usf];
4593
4594         /* error if there is a remainder. Should've been checked by user */
4595         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4596         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4597                           FIELD_PREP(LISTEN_INT_UI, ui);
4598
4599         return (u16) listen_interval;
4600 }