net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2020 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 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         struct ieee80211_sub_if_data *sdata;
 892
 893         if (!vif)
 894                 return NULL;
 895
 896         sdata = vif_to_sdata(vif);
 897
 898         if (!ieee80211_sdata_running(sdata) ||
 899             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 900                 return NULL;
 901
 902         return &sdata->wdev;
 903 }
 904 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 905
 906 /*
 907  * Nothing should have been stuffed into the workqueue during
 908  * the suspend->resume cycle. Since we can't check each caller
 909  * of this function if we are already quiescing / suspended,
 910  * check here and don't WARN since this can actually happen when
 911  * the rx path (for example) is racing against __ieee80211_suspend
 912  * and suspending / quiescing was set after the rx path checked
 913  * them.
 914  */
 915 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 916 {
 917         if (local->quiescing || (local->suspended && !local->resuming)) {
 918                 pr_warn("queueing ieee80211 work while going to suspend\n");
 919                 return false;
 920         }
 921
 922         return true;
 923 }
 924
 925 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 926 {
 927         struct ieee80211_local *local = hw_to_local(hw);
 928
 929         if (!ieee80211_can_queue_work(local))
 930                 return;
 931
 932         queue_work(local->workqueue, work);
 933 }
 934 EXPORT_SYMBOL(ieee80211_queue_work);
 935
 936 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 937                                   struct delayed_work *dwork,
 938                                   unsigned long delay)
 939 {
 940         struct ieee80211_local *local = hw_to_local(hw);
 941
 942         if (!ieee80211_can_queue_work(local))
 943                 return;
 944
 945         queue_delayed_work(local->workqueue, dwork, delay);
 946 }
 947 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 948
 949 static void ieee80211_parse_extension_element(u32 *crc,
 950                                               const struct element *elem,
 951                                               struct ieee802_11_elems *elems)
 952 {
 953         const void *data = elem->data + 1;
 954         u8 len = elem->datalen - 1;
 955
 956         switch (elem->data[0]) {
 957         case WLAN_EID_EXT_HE_MU_EDCA:
 958                 if (len == sizeof(*elems->mu_edca_param_set)) {
 959                         elems->mu_edca_param_set = data;
 960                         if (crc)
 961                                 *crc = crc32_be(*crc, (void *)elem,
 962                                                 elem->datalen + 2);
 963                 }
 964                 break;
 965         case WLAN_EID_EXT_HE_CAPABILITY:
 966                 elems->he_cap = data;
 967                 elems->he_cap_len = len;
 968                 break;
 969         case WLAN_EID_EXT_HE_OPERATION:
 970                 if (len >= sizeof(*elems->he_operation) &&
 971                     len == ieee80211_he_oper_size(data) - 1) {
 972                         if (crc)
 973                                 *crc = crc32_be(*crc, (void *)elem,
 974                                                 elem->datalen + 2);
 975                         elems->he_operation = data;
 976                 }
 977                 break;
 978         case WLAN_EID_EXT_UORA:
 979                 if (len == 1)
 980                         elems->uora_element = data;
 981                 break;
 982         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 983                 if (len == 3)
 984                         elems->max_channel_switch_time = data;
 985                 break;
 986         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 987                 if (len == sizeof(*elems->mbssid_config_ie))
 988                         elems->mbssid_config_ie = data;
 989                 break;
 990         case WLAN_EID_EXT_HE_SPR:
 991                 if (len >= sizeof(*elems->he_spr) &&
 992                     len >= ieee80211_he_spr_size(data))
 993                         elems->he_spr = data;
 994                 break;
 995         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 996                 if (len == sizeof(*elems->he_6ghz_capa))
 997                         elems->he_6ghz_capa = data;
 998                 break;
 999         }
1000 }
1001
1002 static u32
1003 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1004                             struct ieee802_11_elems *elems,
1005                             u64 filter, u32 crc,
1006                             const struct element *check_inherit)
1007 {
1008         const struct element *elem;
1009         bool calc_crc = filter != 0;
1010         DECLARE_BITMAP(seen_elems, 256);
1011         const u8 *ie;
1012
1013         bitmap_zero(seen_elems, 256);
1014
1015         for_each_element(elem, start, len) {
1016                 bool elem_parse_failed;
1017                 u8 id = elem->id;
1018                 u8 elen = elem->datalen;
1019                 const u8 *pos = elem->data;
1020
1021                 if (check_inherit &&
1022                     !cfg80211_is_element_inherited(elem,
1023                                                    check_inherit))
1024                         continue;
1025
1026                 switch (id) {
1027                 case WLAN_EID_SSID:
1028                 case WLAN_EID_SUPP_RATES:
1029                 case WLAN_EID_FH_PARAMS:
1030                 case WLAN_EID_DS_PARAMS:
1031                 case WLAN_EID_CF_PARAMS:
1032                 case WLAN_EID_TIM:
1033                 case WLAN_EID_IBSS_PARAMS:
1034                 case WLAN_EID_CHALLENGE:
1035                 case WLAN_EID_RSN:
1036                 case WLAN_EID_ERP_INFO:
1037                 case WLAN_EID_EXT_SUPP_RATES:
1038                 case WLAN_EID_HT_CAPABILITY:
1039                 case WLAN_EID_HT_OPERATION:
1040                 case WLAN_EID_VHT_CAPABILITY:
1041                 case WLAN_EID_VHT_OPERATION:
1042                 case WLAN_EID_MESH_ID:
1043                 case WLAN_EID_MESH_CONFIG:
1044                 case WLAN_EID_PEER_MGMT:
1045                 case WLAN_EID_PREQ:
1046                 case WLAN_EID_PREP:
1047                 case WLAN_EID_PERR:
1048                 case WLAN_EID_RANN:
1049                 case WLAN_EID_CHANNEL_SWITCH:
1050                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1051                 case WLAN_EID_COUNTRY:
1052                 case WLAN_EID_PWR_CONSTRAINT:
1053                 case WLAN_EID_TIMEOUT_INTERVAL:
1054                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1055                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1056                 case WLAN_EID_CHAN_SWITCH_PARAM:
1057                 case WLAN_EID_EXT_CAPABILITY:
1058                 case WLAN_EID_CHAN_SWITCH_TIMING:
1059                 case WLAN_EID_LINK_ID:
1060                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1061                 case WLAN_EID_RSNX:
1062                 case WLAN_EID_S1G_BCN_COMPAT:
1063                 case WLAN_EID_S1G_CAPABILITIES:
1064                 case WLAN_EID_S1G_OPERATION:
1065                 case WLAN_EID_AID_RESPONSE:
1066                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1067                 /*
1068                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1069                  * that if the content gets bigger it might be needed more than once
1070                  */
1071                         if (test_bit(id, seen_elems)) {
1072                                 elems->parse_error = true;
1073                                 continue;
1074                         }
1075                         break;
1076                 }
1077
1078                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1079                         crc = crc32_be(crc, pos - 2, elen + 2);
1080
1081                 elem_parse_failed = false;
1082
1083                 switch (id) {
1084                 case WLAN_EID_LINK_ID:
1085                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1086                                 elem_parse_failed = true;
1087                                 break;
1088                         }
1089                         elems->lnk_id = (void *)(pos - 2);
1090                         break;
1091                 case WLAN_EID_CHAN_SWITCH_TIMING:
1092                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1093                                 elem_parse_failed = true;
1094                                 break;
1095                         }
1096                         elems->ch_sw_timing = (void *)pos;
1097                         break;
1098                 case WLAN_EID_EXT_CAPABILITY:
1099                         elems->ext_capab = pos;
1100                         elems->ext_capab_len = elen;
1101                         break;
1102                 case WLAN_EID_SSID:
1103                         elems->ssid = pos;
1104                         elems->ssid_len = elen;
1105                         break;
1106                 case WLAN_EID_SUPP_RATES:
1107                         elems->supp_rates = pos;
1108                         elems->supp_rates_len = elen;
1109                         break;
1110                 case WLAN_EID_DS_PARAMS:
1111                         if (elen >= 1)
1112                                 elems->ds_params = pos;
1113                         else
1114                                 elem_parse_failed = true;
1115                         break;
1116                 case WLAN_EID_TIM:
1117                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1118                                 elems->tim = (void *)pos;
1119                                 elems->tim_len = elen;
1120                         } else
1121                                 elem_parse_failed = true;
1122                         break;
1123                 case WLAN_EID_CHALLENGE:
1124                         elems->challenge = pos;
1125                         elems->challenge_len = elen;
1126                         break;
1127                 case WLAN_EID_VENDOR_SPECIFIC:
1128                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1129                             pos[2] == 0xf2) {
1130                                 /* Microsoft OUI (00:50:F2) */
1131
1132                                 if (calc_crc)
1133                                         crc = crc32_be(crc, pos - 2, elen + 2);
1134
1135                                 if (elen >= 5 && pos[3] == 2) {
1136                                         /* OUI Type 2 - WMM IE */
1137                                         if (pos[4] == 0) {
1138                                                 elems->wmm_info = pos;
1139                                                 elems->wmm_info_len = elen;
1140                                         } else if (pos[4] == 1) {
1141                                                 elems->wmm_param = pos;
1142                                                 elems->wmm_param_len = elen;
1143                                         }
1144                                 }
1145                         }
1146                         break;
1147                 case WLAN_EID_RSN:
1148                         elems->rsn = pos;
1149                         elems->rsn_len = elen;
1150                         break;
1151                 case WLAN_EID_ERP_INFO:
1152                         if (elen >= 1)
1153                                 elems->erp_info = pos;
1154                         else
1155                                 elem_parse_failed = true;
1156                         break;
1157                 case WLAN_EID_EXT_SUPP_RATES:
1158                         elems->ext_supp_rates = pos;
1159                         elems->ext_supp_rates_len = elen;
1160                         break;
1161                 case WLAN_EID_HT_CAPABILITY:
1162                         if (elen >= sizeof(struct ieee80211_ht_cap))
1163                                 elems->ht_cap_elem = (void *)pos;
1164                         else
1165                                 elem_parse_failed = true;
1166                         break;
1167                 case WLAN_EID_HT_OPERATION:
1168                         if (elen >= sizeof(struct ieee80211_ht_operation))
1169                                 elems->ht_operation = (void *)pos;
1170                         else
1171                                 elem_parse_failed = true;
1172                         break;
1173                 case WLAN_EID_VHT_CAPABILITY:
1174                         if (elen >= sizeof(struct ieee80211_vht_cap))
1175                                 elems->vht_cap_elem = (void *)pos;
1176                         else
1177                                 elem_parse_failed = true;
1178                         break;
1179                 case WLAN_EID_VHT_OPERATION:
1180                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1181                                 elems->vht_operation = (void *)pos;
1182                                 if (calc_crc)
1183                                         crc = crc32_be(crc, pos - 2, elen + 2);
1184                                 break;
1185                         }
1186                         elem_parse_failed = true;
1187                         break;
1188                 case WLAN_EID_OPMODE_NOTIF:
1189                         if (elen > 0) {
1190                                 elems->opmode_notif = pos;
1191                                 if (calc_crc)
1192                                         crc = crc32_be(crc, pos - 2, elen + 2);
1193                                 break;
1194                         }
1195                         elem_parse_failed = true;
1196                         break;
1197                 case WLAN_EID_MESH_ID:
1198                         elems->mesh_id = pos;
1199                         elems->mesh_id_len = elen;
1200                         break;
1201                 case WLAN_EID_MESH_CONFIG:
1202                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1203                                 elems->mesh_config = (void *)pos;
1204                         else
1205                                 elem_parse_failed = true;
1206                         break;
1207                 case WLAN_EID_PEER_MGMT:
1208                         elems->peering = pos;
1209                         elems->peering_len = elen;
1210                         break;
1211                 case WLAN_EID_MESH_AWAKE_WINDOW:
1212                         if (elen >= 2)
1213                                 elems->awake_window = (void *)pos;
1214                         break;
1215                 case WLAN_EID_PREQ:
1216                         elems->preq = pos;
1217                         elems->preq_len = elen;
1218                         break;
1219                 case WLAN_EID_PREP:
1220                         elems->prep = pos;
1221                         elems->prep_len = elen;
1222                         break;
1223                 case WLAN_EID_PERR:
1224                         elems->perr = pos;
1225                         elems->perr_len = elen;
1226                         break;
1227                 case WLAN_EID_RANN:
1228                         if (elen >= sizeof(struct ieee80211_rann_ie))
1229                                 elems->rann = (void *)pos;
1230                         else
1231                                 elem_parse_failed = true;
1232                         break;
1233                 case WLAN_EID_CHANNEL_SWITCH:
1234                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1235                                 elem_parse_failed = true;
1236                                 break;
1237                         }
1238                         elems->ch_switch_ie = (void *)pos;
1239                         break;
1240                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1241                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1242                                 elem_parse_failed = true;
1243                                 break;
1244                         }
1245                         elems->ext_chansw_ie = (void *)pos;
1246                         break;
1247                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1248                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1249                                 elem_parse_failed = true;
1250                                 break;
1251                         }
1252                         elems->sec_chan_offs = (void *)pos;
1253                         break;
1254                 case WLAN_EID_CHAN_SWITCH_PARAM:
1255                         if (elen !=
1256                             sizeof(*elems->mesh_chansw_params_ie)) {
1257                                 elem_parse_failed = true;
1258                                 break;
1259                         }
1260                         elems->mesh_chansw_params_ie = (void *)pos;
1261                         break;
1262                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1263                         if (!action ||
1264                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1265                                 elem_parse_failed = true;
1266                                 break;
1267                         }
1268                         elems->wide_bw_chansw_ie = (void *)pos;
1269                         break;
1270                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1271                         if (action) {
1272                                 elem_parse_failed = true;
1273                                 break;
1274                         }
1275                         /*
1276                          * This is a bit tricky, but as we only care about
1277                          * the wide bandwidth channel switch element, so
1278                          * just parse it out manually.
1279                          */
1280                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1281                                               pos, elen);
1282                         if (ie) {
1283                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1284                                         elems->wide_bw_chansw_ie =
1285                                                 (void *)(ie + 2);
1286                                 else
1287                                         elem_parse_failed = true;
1288                         }
1289                         break;
1290                 case WLAN_EID_COUNTRY:
1291                         elems->country_elem = pos;
1292                         elems->country_elem_len = elen;
1293                         break;
1294                 case WLAN_EID_PWR_CONSTRAINT:
1295                         if (elen != 1) {
1296                                 elem_parse_failed = true;
1297                                 break;
1298                         }
1299                         elems->pwr_constr_elem = pos;
1300                         break;
1301                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1302                         /* Lots of different options exist, but we only care
1303                          * about the Dynamic Transmit Power Control element.
1304                          * First check for the Cisco OUI, then for the DTPC
1305                          * tag (0x00).
1306                          */
1307                         if (elen < 4) {
1308                                 elem_parse_failed = true;
1309                                 break;
1310                         }
1311
1312                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1313                             pos[2] != 0x96 || pos[3] != 0x00)
1314                                 break;
1315
1316                         if (elen != 6) {
1317                                 elem_parse_failed = true;
1318                                 break;
1319                         }
1320
1321                         if (calc_crc)
1322                                 crc = crc32_be(crc, pos - 2, elen + 2);
1323
1324                         elems->cisco_dtpc_elem = pos;
1325                         break;
1326                 case WLAN_EID_ADDBA_EXT:
1327                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1328                                 elem_parse_failed = true;
1329                                 break;
1330                         }
1331                         elems->addba_ext_ie = (void *)pos;
1332                         break;
1333                 case WLAN_EID_TIMEOUT_INTERVAL:
1334                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1335                                 elems->timeout_int = (void *)pos;
1336                         else
1337                                 elem_parse_failed = true;
1338                         break;
1339                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1340                         if (elen >= sizeof(*elems->max_idle_period_ie))
1341                                 elems->max_idle_period_ie = (void *)pos;
1342                         break;
1343                 case WLAN_EID_RSNX:
1344                         elems->rsnx = pos;
1345                         elems->rsnx_len = elen;
1346                         break;
1347                 case WLAN_EID_EXTENSION:
1348                         ieee80211_parse_extension_element(calc_crc ?
1349                                                                 &crc : NULL,
1350                                                           elem, elems);
1351                         break;
1352                 case WLAN_EID_S1G_CAPABILITIES:
1353                         if (elen == sizeof(*elems->s1g_capab))
1354                                 elems->s1g_capab = (void *)pos;
1355                         else
1356                                 elem_parse_failed = true;
1357                         break;
1358                 case WLAN_EID_S1G_OPERATION:
1359                         if (elen == sizeof(*elems->s1g_oper))
1360                                 elems->s1g_oper = (void *)pos;
1361                         else
1362                                 elem_parse_failed = true;
1363                         break;
1364                 case WLAN_EID_S1G_BCN_COMPAT:
1365                         if (elen == sizeof(*elems->s1g_bcn_compat))
1366                                 elems->s1g_bcn_compat = (void *)pos;
1367                         else
1368                                 elem_parse_failed = true;
1369                         break;
1370                 case WLAN_EID_AID_RESPONSE:
1371                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1372                                 elems->aid_resp = (void *)pos;
1373                         else
1374                                 elem_parse_failed = true;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379
1380                 if (elem_parse_failed)
1381                         elems->parse_error = true;
1382                 else
1383                         __set_bit(id, seen_elems);
1384         }
1385
1386         if (!for_each_element_completed(elem, start, len))
1387                 elems->parse_error = true;
1388
1389         return crc;
1390 }
1391
1392 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1393                                             struct ieee802_11_elems *elems,
1394                                             u8 *transmitter_bssid,
1395                                             u8 *bss_bssid,
1396                                             u8 *nontransmitted_profile)
1397 {
1398         const struct element *elem, *sub;
1399         size_t profile_len = 0;
1400         bool found = false;
1401
1402         if (!bss_bssid || !transmitter_bssid)
1403                 return profile_len;
1404
1405         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1406                 if (elem->datalen < 2)
1407                         continue;
1408
1409                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1410                         u8 new_bssid[ETH_ALEN];
1411                         const u8 *index;
1412
1413                         if (sub->id != 0 || sub->datalen < 4) {
1414                                 /* not a valid BSS profile */
1415                                 continue;
1416                         }
1417
1418                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1419                             sub->data[1] != 2) {
1420                                 /* The first element of the
1421                                  * Nontransmitted BSSID Profile is not
1422                                  * the Nontransmitted BSSID Capability
1423                                  * element.
1424                                  */
1425                                 continue;
1426                         }
1427
1428                         memset(nontransmitted_profile, 0, len);
1429                         profile_len = cfg80211_merge_profile(start, len,
1430                                                              elem,
1431                                                              sub,
1432                                                              nontransmitted_profile,
1433                                                              len);
1434
1435                         /* found a Nontransmitted BSSID Profile */
1436                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1437                                                  nontransmitted_profile,
1438                                                  profile_len);
1439                         if (!index || index[1] < 1 || index[2] == 0) {
1440                                 /* Invalid MBSSID Index element */
1441                                 continue;
1442                         }
1443
1444                         cfg80211_gen_new_bssid(transmitter_bssid,
1445                                                elem->data[0],
1446                                                index[2],
1447                                                new_bssid);
1448                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1449                                 found = true;
1450                                 elems->bssid_index_len = index[1];
1451                                 elems->bssid_index = (void *)&index[2];
1452                                 break;
1453                         }
1454                 }
1455         }
1456
1457         return found ? profile_len : 0;
1458 }
1459
1460 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1461                                struct ieee802_11_elems *elems,
1462                                u64 filter, u32 crc, u8 *transmitter_bssid,
1463                                u8 *bss_bssid)
1464 {
1465         const struct element *non_inherit = NULL;
1466         u8 *nontransmitted_profile;
1467         int nontransmitted_profile_len = 0;
1468
1469         memset(elems, 0, sizeof(*elems));
1470         elems->ie_start = start;
1471         elems->total_len = len;
1472
1473         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1474         if (nontransmitted_profile) {
1475                 nontransmitted_profile_len =
1476                         ieee802_11_find_bssid_profile(start, len, elems,
1477                                                       transmitter_bssid,
1478                                                       bss_bssid,
1479                                                       nontransmitted_profile);
1480                 non_inherit =
1481                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1482                                                nontransmitted_profile,
1483                                                nontransmitted_profile_len);
1484         }
1485
1486         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1487                                           crc, non_inherit);
1488
1489         /* Override with nontransmitted profile, if found */
1490         if (nontransmitted_profile_len)
1491                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1492                                             nontransmitted_profile_len,
1493                                             action, elems, 0, 0, NULL);
1494
1495         if (elems->tim && !elems->parse_error) {
1496                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1497
1498                 elems->dtim_period = tim_ie->dtim_period;
1499                 elems->dtim_count = tim_ie->dtim_count;
1500         }
1501
1502         /* Override DTIM period and count if needed */
1503         if (elems->bssid_index &&
1504             elems->bssid_index_len >=
1505             offsetofend(struct ieee80211_bssid_index, dtim_period))
1506                 elems->dtim_period = elems->bssid_index->dtim_period;
1507
1508         if (elems->bssid_index &&
1509             elems->bssid_index_len >=
1510             offsetofend(struct ieee80211_bssid_index, dtim_count))
1511                 elems->dtim_count = elems->bssid_index->dtim_count;
1512
1513         kfree(nontransmitted_profile);
1514
1515         return crc;
1516 }
1517
1518 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1519                                            struct ieee80211_tx_queue_params
1520                                            *qparam, int ac)
1521 {
1522         struct ieee80211_chanctx_conf *chanctx_conf;
1523         const struct ieee80211_reg_rule *rrule;
1524         const struct ieee80211_wmm_ac *wmm_ac;
1525         u16 center_freq = 0;
1526
1527         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1528             sdata->vif.type != NL80211_IFTYPE_STATION)
1529                 return;
1530
1531         rcu_read_lock();
1532         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1533         if (chanctx_conf)
1534                 center_freq = chanctx_conf->def.chan->center_freq;
1535
1536         if (!center_freq) {
1537                 rcu_read_unlock();
1538                 return;
1539         }
1540
1541         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1542
1543         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1544                 rcu_read_unlock();
1545                 return;
1546         }
1547
1548         if (sdata->vif.type == NL80211_IFTYPE_AP)
1549                 wmm_ac = &rrule->wmm_rule.ap[ac];
1550         else
1551                 wmm_ac = &rrule->wmm_rule.client[ac];
1552         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1553         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1554         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1555         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1556         rcu_read_unlock();
1557 }
1558
1559 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1560                                bool bss_notify, bool enable_qos)
1561 {
1562         struct ieee80211_local *local = sdata->local;
1563         struct ieee80211_tx_queue_params qparam;
1564         struct ieee80211_chanctx_conf *chanctx_conf;
1565         int ac;
1566         bool use_11b;
1567         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1568         int aCWmin, aCWmax;
1569
1570         if (!local->ops->conf_tx)
1571                 return;
1572
1573         if (local->hw.queues < IEEE80211_NUM_ACS)
1574                 return;
1575
1576         memset(&qparam, 0, sizeof(qparam));
1577
1578         rcu_read_lock();
1579         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1580         use_11b = (chanctx_conf &&
1581                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1582                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1583         rcu_read_unlock();
1584
1585         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1586
1587         /* Set defaults according to 802.11-2007 Table 7-37 */
1588         aCWmax = 1023;
1589         if (use_11b)
1590                 aCWmin = 31;
1591         else
1592                 aCWmin = 15;
1593
1594         /* Confiure old 802.11b/g medium access rules. */
1595         qparam.cw_max = aCWmax;
1596         qparam.cw_min = aCWmin;
1597         qparam.txop = 0;
1598         qparam.aifs = 2;
1599
1600         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1601                 /* Update if QoS is enabled. */
1602                 if (enable_qos) {
1603                         switch (ac) {
1604                         case IEEE80211_AC_BK:
1605                                 qparam.cw_max = aCWmax;
1606                                 qparam.cw_min = aCWmin;
1607                                 qparam.txop = 0;
1608                                 if (is_ocb)
1609                                         qparam.aifs = 9;
1610                                 else
1611                                         qparam.aifs = 7;
1612                                 break;
1613                         /* never happens but let's not leave undefined */
1614                         default:
1615                         case IEEE80211_AC_BE:
1616                                 qparam.cw_max = aCWmax;
1617                                 qparam.cw_min = aCWmin;
1618                                 qparam.txop = 0;
1619                                 if (is_ocb)
1620                                         qparam.aifs = 6;
1621                                 else
1622                                         qparam.aifs = 3;
1623                                 break;
1624                         case IEEE80211_AC_VI:
1625                                 qparam.cw_max = aCWmin;
1626                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1627                                 if (is_ocb)
1628                                         qparam.txop = 0;
1629                                 else if (use_11b)
1630                                         qparam.txop = 6016/32;
1631                                 else
1632                                         qparam.txop = 3008/32;
1633
1634                                 if (is_ocb)
1635                                         qparam.aifs = 3;
1636                                 else
1637                                         qparam.aifs = 2;
1638                                 break;
1639                         case IEEE80211_AC_VO:
1640                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1641                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1642                                 if (is_ocb)
1643                                         qparam.txop = 0;
1644                                 else if (use_11b)
1645                                         qparam.txop = 3264/32;
1646                                 else
1647                                         qparam.txop = 1504/32;
1648                                 qparam.aifs = 2;
1649                                 break;
1650                         }
1651                 }
1652                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1653
1654                 qparam.uapsd = false;
1655
1656                 sdata->tx_conf[ac] = qparam;
1657                 drv_conf_tx(local, sdata, ac, &qparam);
1658         }
1659
1660         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1661             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1662             sdata->vif.type != NL80211_IFTYPE_NAN) {
1663                 sdata->vif.bss_conf.qos = enable_qos;
1664                 if (bss_notify)
1665                         ieee80211_bss_info_change_notify(sdata,
1666                                                          BSS_CHANGED_QOS);
1667         }
1668 }
1669
1670 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1671                          u16 transaction, u16 auth_alg, u16 status,
1672                          const u8 *extra, size_t extra_len, const u8 *da,
1673                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1674                          u32 tx_flags)
1675 {
1676         struct ieee80211_local *local = sdata->local;
1677         struct sk_buff *skb;
1678         struct ieee80211_mgmt *mgmt;
1679         int err;
1680
1681         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1682         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1683                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1684         if (!skb)
1685                 return;
1686
1687         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1688
1689         mgmt = skb_put_zero(skb, 24 + 6);
1690         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1691                                           IEEE80211_STYPE_AUTH);
1692         memcpy(mgmt->da, da, ETH_ALEN);
1693         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1694         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1695         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1696         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1697         mgmt->u.auth.status_code = cpu_to_le16(status);
1698         if (extra)
1699                 skb_put_data(skb, extra, extra_len);
1700
1701         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1702                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1703                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1704                 WARN_ON(err);
1705         }
1706
1707         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1708                                         tx_flags;
1709         ieee80211_tx_skb(sdata, skb);
1710 }
1711
1712 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1713                                     const u8 *da, const u8 *bssid,
1714                                     u16 stype, u16 reason,
1715                                     bool send_frame, u8 *frame_buf)
1716 {
1717         struct ieee80211_local *local = sdata->local;
1718         struct sk_buff *skb;
1719         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1720
1721         /* build frame */
1722         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1723         mgmt->duration = 0; /* initialize only */
1724         mgmt->seq_ctrl = 0; /* initialize only */
1725         memcpy(mgmt->da, da, ETH_ALEN);
1726         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1727         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1728         /* u.deauth.reason_code == u.disassoc.reason_code */
1729         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1730
1731         if (send_frame) {
1732                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1733                                     IEEE80211_DEAUTH_FRAME_LEN);
1734                 if (!skb)
1735                         return;
1736
1737                 skb_reserve(skb, local->hw.extra_tx_headroom);
1738
1739                 /* copy in frame */
1740                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1741
1742                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1743                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1744                         IEEE80211_SKB_CB(skb)->flags |=
1745                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1746
1747                 ieee80211_tx_skb(sdata, skb);
1748         }
1749 }
1750
1751 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1752 {
1753         if ((end - pos) < 5)
1754                 return pos;
1755
1756         *pos++ = WLAN_EID_EXTENSION;
1757         *pos++ = 1 + sizeof(cap);
1758         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1759         memcpy(pos, &cap, sizeof(cap));
1760
1761         return pos + 2;
1762 }
1763
1764 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1765                                          u8 *buffer, size_t buffer_len,
1766                                          const u8 *ie, size_t ie_len,
1767                                          enum nl80211_band band,
1768                                          u32 rate_mask,
1769                                          struct cfg80211_chan_def *chandef,
1770                                          size_t *offset, u32 flags)
1771 {
1772         struct ieee80211_local *local = sdata->local;
1773         struct ieee80211_supported_band *sband;
1774         const struct ieee80211_sta_he_cap *he_cap;
1775         u8 *pos = buffer, *end = buffer + buffer_len;
1776         size_t noffset;
1777         int supp_rates_len, i;
1778         u8 rates[32];
1779         int num_rates;
1780         int ext_rates_len;
1781         int shift;
1782         u32 rate_flags;
1783         bool have_80mhz = false;
1784
1785         *offset = 0;
1786
1787         sband = local->hw.wiphy->bands[band];
1788         if (WARN_ON_ONCE(!sband))
1789                 return 0;
1790
1791         rate_flags = ieee80211_chandef_rate_flags(chandef);
1792         shift = ieee80211_chandef_get_shift(chandef);
1793
1794         num_rates = 0;
1795         for (i = 0; i < sband->n_bitrates; i++) {
1796                 if ((BIT(i) & rate_mask) == 0)
1797                         continue; /* skip rate */
1798                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1799                         continue;
1800
1801                 rates[num_rates++] =
1802                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1803                                           (1 << shift) * 5);
1804         }
1805
1806         supp_rates_len = min_t(int, num_rates, 8);
1807
1808         if (end - pos < 2 + supp_rates_len)
1809                 goto out_err;
1810         *pos++ = WLAN_EID_SUPP_RATES;
1811         *pos++ = supp_rates_len;
1812         memcpy(pos, rates, supp_rates_len);
1813         pos += supp_rates_len;
1814
1815         /* insert "request information" if in custom IEs */
1816         if (ie && ie_len) {
1817                 static const u8 before_extrates[] = {
1818                         WLAN_EID_SSID,
1819                         WLAN_EID_SUPP_RATES,
1820                         WLAN_EID_REQUEST,
1821                 };
1822                 noffset = ieee80211_ie_split(ie, ie_len,
1823                                              before_extrates,
1824                                              ARRAY_SIZE(before_extrates),
1825                                              *offset);
1826                 if (end - pos < noffset - *offset)
1827                         goto out_err;
1828                 memcpy(pos, ie + *offset, noffset - *offset);
1829                 pos += noffset - *offset;
1830                 *offset = noffset;
1831         }
1832
1833         ext_rates_len = num_rates - supp_rates_len;
1834         if (ext_rates_len > 0) {
1835                 if (end - pos < 2 + ext_rates_len)
1836                         goto out_err;
1837                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1838                 *pos++ = ext_rates_len;
1839                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1840                 pos += ext_rates_len;
1841         }
1842
1843         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1844                 if (end - pos < 3)
1845                         goto out_err;
1846                 *pos++ = WLAN_EID_DS_PARAMS;
1847                 *pos++ = 1;
1848                 *pos++ = ieee80211_frequency_to_channel(
1849                                 chandef->chan->center_freq);
1850         }
1851
1852         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1853                 goto done;
1854
1855         /* insert custom IEs that go before HT */
1856         if (ie && ie_len) {
1857                 static const u8 before_ht[] = {
1858                         /*
1859                          * no need to list the ones split off already
1860                          * (or generated here)
1861                          */
1862                         WLAN_EID_DS_PARAMS,
1863                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1864                 };
1865                 noffset = ieee80211_ie_split(ie, ie_len,
1866                                              before_ht, ARRAY_SIZE(before_ht),
1867                                              *offset);
1868                 if (end - pos < noffset - *offset)
1869                         goto out_err;
1870                 memcpy(pos, ie + *offset, noffset - *offset);
1871                 pos += noffset - *offset;
1872                 *offset = noffset;
1873         }
1874
1875         if (sband->ht_cap.ht_supported) {
1876                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1877                         goto out_err;
1878                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1879                                                 sband->ht_cap.cap);
1880         }
1881
1882         /* insert custom IEs that go before VHT */
1883         if (ie && ie_len) {
1884                 static const u8 before_vht[] = {
1885                         /*
1886                          * no need to list the ones split off already
1887                          * (or generated here)
1888                          */
1889                         WLAN_EID_BSS_COEX_2040,
1890                         WLAN_EID_EXT_CAPABILITY,
1891                         WLAN_EID_SSID_LIST,
1892                         WLAN_EID_CHANNEL_USAGE,
1893                         WLAN_EID_INTERWORKING,
1894                         WLAN_EID_MESH_ID,
1895                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1896                 };
1897                 noffset = ieee80211_ie_split(ie, ie_len,
1898                                              before_vht, ARRAY_SIZE(before_vht),
1899                                              *offset);
1900                 if (end - pos < noffset - *offset)
1901                         goto out_err;
1902                 memcpy(pos, ie + *offset, noffset - *offset);
1903                 pos += noffset - *offset;
1904                 *offset = noffset;
1905         }
1906
1907         /* Check if any channel in this sband supports at least 80 MHz */
1908         for (i = 0; i < sband->n_channels; i++) {
1909                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1910                                                 IEEE80211_CHAN_NO_80MHZ))
1911                         continue;
1912
1913                 have_80mhz = true;
1914                 break;
1915         }
1916
1917         if (sband->vht_cap.vht_supported && have_80mhz) {
1918                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1919                         goto out_err;
1920                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1921                                                  sband->vht_cap.cap);
1922         }
1923
1924         /* insert custom IEs that go before HE */
1925         if (ie && ie_len) {
1926                 static const u8 before_he[] = {
1927                         /*
1928                          * no need to list the ones split off before VHT
1929                          * or generated here
1930                          */
1931                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1932                         WLAN_EID_AP_CSN,
1933                         /* TODO: add 11ah/11aj/11ak elements */
1934                 };
1935                 noffset = ieee80211_ie_split(ie, ie_len,
1936                                              before_he, ARRAY_SIZE(before_he),
1937                                              *offset);
1938                 if (end - pos < noffset - *offset)
1939                         goto out_err;
1940                 memcpy(pos, ie + *offset, noffset - *offset);
1941                 pos += noffset - *offset;
1942                 *offset = noffset;
1943         }
1944
1945         he_cap = ieee80211_get_he_sta_cap(sband);
1946         if (he_cap) {
1947                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1948                 if (!pos)
1949                         goto out_err;
1950
1951                 if (sband->band == NL80211_BAND_6GHZ) {
1952                         enum nl80211_iftype iftype =
1953                                 ieee80211_vif_type_p2p(&sdata->vif);
1954                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1955
1956                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1957                 }
1958         }
1959
1960         /*
1961          * If adding more here, adjust code in main.c
1962          * that calculates local->scan_ies_len.
1963          */
1964
1965         return pos - buffer;
1966  out_err:
1967         WARN_ONCE(1, "not enough space for preq IEs\n");
1968  done:
1969         return pos - buffer;
1970 }
1971
1972 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1973                              size_t buffer_len,
1974                              struct ieee80211_scan_ies *ie_desc,
1975                              const u8 *ie, size_t ie_len,
1976                              u8 bands_used, u32 *rate_masks,
1977                              struct cfg80211_chan_def *chandef,
1978                              u32 flags)
1979 {
1980         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1981         int i;
1982
1983         memset(ie_desc, 0, sizeof(*ie_desc));
1984
1985         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1986                 if (bands_used & BIT(i)) {
1987                         pos += ieee80211_build_preq_ies_band(sdata,
1988                                                              buffer + pos,
1989                                                              buffer_len - pos,
1990                                                              ie, ie_len, i,
1991                                                              rate_masks[i],
1992                                                              chandef,
1993                                                              &custom_ie_offset,
1994                                                              flags);
1995                         ie_desc->ies[i] = buffer + old_pos;
1996                         ie_desc->len[i] = pos - old_pos;
1997                         old_pos = pos;
1998                 }
1999         }
2000
2001         /* add any remaining custom IEs */
2002         if (ie && ie_len) {
2003                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2004                               "not enough space for preq custom IEs\n"))
2005                         return pos;
2006                 memcpy(buffer + pos, ie + custom_ie_offset,
2007                        ie_len - custom_ie_offset);
2008                 ie_desc->common_ies = buffer + pos;
2009                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2010                 pos += ie_len - custom_ie_offset;
2011         }
2012
2013         return pos;
2014 };
2015
2016 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2017                                           const u8 *src, const u8 *dst,
2018                                           u32 ratemask,
2019                                           struct ieee80211_channel *chan,
2020                                           const u8 *ssid, size_t ssid_len,
2021                                           const u8 *ie, size_t ie_len,
2022                                           u32 flags)
2023 {
2024         struct ieee80211_local *local = sdata->local;
2025         struct cfg80211_chan_def chandef;
2026         struct sk_buff *skb;
2027         struct ieee80211_mgmt *mgmt;
2028         int ies_len;
2029         u32 rate_masks[NUM_NL80211_BANDS] = {};
2030         struct ieee80211_scan_ies dummy_ie_desc;
2031
2032         /*
2033          * Do not send DS Channel parameter for directed probe requests
2034          * in order to maximize the chance that we get a response.  Some
2035          * badly-behaved APs don't respond when this parameter is included.
2036          */
2037         chandef.width = sdata->vif.bss_conf.chandef.width;
2038         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2039                 chandef.chan = NULL;
2040         else
2041                 chandef.chan = chan;
2042
2043         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2044                                      100 + ie_len);
2045         if (!skb)
2046                 return NULL;
2047
2048         rate_masks[chan->band] = ratemask;
2049         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2050                                            skb_tailroom(skb), &dummy_ie_desc,
2051                                            ie, ie_len, BIT(chan->band),
2052                                            rate_masks, &chandef, flags);
2053         skb_put(skb, ies_len);
2054
2055         if (dst) {
2056                 mgmt = (struct ieee80211_mgmt *) skb->data;
2057                 memcpy(mgmt->da, dst, ETH_ALEN);
2058                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2059         }
2060
2061         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2062
2063         return skb;
2064 }
2065
2066 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2067                             struct ieee802_11_elems *elems,
2068                             enum nl80211_band band, u32 *basic_rates)
2069 {
2070         struct ieee80211_supported_band *sband;
2071         size_t num_rates;
2072         u32 supp_rates, rate_flags;
2073         int i, j, shift;
2074
2075         sband = sdata->local->hw.wiphy->bands[band];
2076         if (WARN_ON(!sband))
2077                 return 1;
2078
2079         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2080         shift = ieee80211_vif_get_shift(&sdata->vif);
2081
2082         num_rates = sband->n_bitrates;
2083         supp_rates = 0;
2084         for (i = 0; i < elems->supp_rates_len +
2085                      elems->ext_supp_rates_len; i++) {
2086                 u8 rate = 0;
2087                 int own_rate;
2088                 bool is_basic;
2089                 if (i < elems->supp_rates_len)
2090                         rate = elems->supp_rates[i];
2091                 else if (elems->ext_supp_rates)
2092                         rate = elems->ext_supp_rates
2093                                 [i - elems->supp_rates_len];
2094                 own_rate = 5 * (rate & 0x7f);
2095                 is_basic = !!(rate & 0x80);
2096
2097                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2098                         continue;
2099
2100                 for (j = 0; j < num_rates; j++) {
2101                         int brate;
2102                         if ((rate_flags & sband->bitrates[j].flags)
2103                             != rate_flags)
2104                                 continue;
2105
2106                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2107                                              1 << shift);
2108
2109                         if (brate == own_rate) {
2110                                 supp_rates |= BIT(j);
2111                                 if (basic_rates && is_basic)
2112                                         *basic_rates |= BIT(j);
2113                         }
2114                 }
2115         }
2116         return supp_rates;
2117 }
2118
2119 void ieee80211_stop_device(struct ieee80211_local *local)
2120 {
2121         ieee80211_led_radio(local, false);
2122         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2123
2124         cancel_work_sync(&local->reconfig_filter);
2125
2126         flush_workqueue(local->workqueue);
2127         drv_stop(local);
2128 }
2129
2130 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2131                                            bool aborted)
2132 {
2133         /* It's possible that we don't handle the scan completion in
2134          * time during suspend, so if it's still marked as completed
2135          * here, queue the work and flush it to clean things up.
2136          * Instead of calling the worker function directly here, we
2137          * really queue it to avoid potential races with other flows
2138          * scheduling the same work.
2139          */
2140         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2141                 /* If coming from reconfiguration failure, abort the scan so
2142                  * we don't attempt to continue a partial HW scan - which is
2143                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2144                  * completed scan, and a 5 GHz portion is still pending.
2145                  */
2146                 if (aborted)
2147                         set_bit(SCAN_ABORTED, &local->scanning);
2148                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2149                 flush_delayed_work(&local->scan_work);
2150         }
2151 }
2152
2153 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2154 {
2155         struct ieee80211_sub_if_data *sdata;
2156         struct ieee80211_chanctx *ctx;
2157
2158         /*
2159          * We get here if during resume the device can't be restarted properly.
2160          * We might also get here if this happens during HW reset, which is a
2161          * slightly different situation and we need to drop all connections in
2162          * the latter case.
2163          *
2164          * Ask cfg80211 to turn off all interfaces, this will result in more
2165          * warnings but at least we'll then get into a clean stopped state.
2166          */
2167
2168         local->resuming = false;
2169         local->suspended = false;
2170         local->in_reconfig = false;
2171
2172         ieee80211_flush_completed_scan(local, true);
2173
2174         /* scheduled scan clearly can't be running any more, but tell
2175          * cfg80211 and clear local state
2176          */
2177         ieee80211_sched_scan_end(local);
2178
2179         list_for_each_entry(sdata, &local->interfaces, list)
2180                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2181
2182         /* Mark channel contexts as not being in the driver any more to avoid
2183          * removing them from the driver during the shutdown process...
2184          */
2185         mutex_lock(&local->chanctx_mtx);
2186         list_for_each_entry(ctx, &local->chanctx_list, list)
2187                 ctx->driver_present = false;
2188         mutex_unlock(&local->chanctx_mtx);
2189
2190         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2191 }
2192
2193 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2194                                      struct ieee80211_sub_if_data *sdata)
2195 {
2196         struct ieee80211_chanctx_conf *conf;
2197         struct ieee80211_chanctx *ctx;
2198
2199         if (!local->use_chanctx)
2200                 return;
2201
2202         mutex_lock(&local->chanctx_mtx);
2203         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2204                                          lockdep_is_held(&local->chanctx_mtx));
2205         if (conf) {
2206                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2207                 drv_assign_vif_chanctx(local, sdata, ctx);
2208         }
2209         mutex_unlock(&local->chanctx_mtx);
2210 }
2211
2212 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2213 {
2214         struct ieee80211_local *local = sdata->local;
2215         struct sta_info *sta;
2216
2217         /* add STAs back */
2218         mutex_lock(&local->sta_mtx);
2219         list_for_each_entry(sta, &local->sta_list, list) {
2220                 enum ieee80211_sta_state state;
2221
2222                 if (!sta->uploaded || sta->sdata != sdata)
2223                         continue;
2224
2225                 for (state = IEEE80211_STA_NOTEXIST;
2226                      state < sta->sta_state; state++)
2227                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2228                                               state + 1));
2229         }
2230         mutex_unlock(&local->sta_mtx);
2231 }
2232
2233 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2234 {
2235         struct cfg80211_nan_func *func, **funcs;
2236         int res, id, i = 0;
2237
2238         res = drv_start_nan(sdata->local, sdata,
2239                             &sdata->u.nan.conf);
2240         if (WARN_ON(res))
2241                 return res;
2242
2243         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2244                         sizeof(*funcs),
2245                         GFP_KERNEL);
2246         if (!funcs)
2247                 return -ENOMEM;
2248
2249         /* Add all the functions:
2250          * This is a little bit ugly. We need to call a potentially sleeping
2251          * callback for each NAN function, so we can't hold the spinlock.
2252          */
2253         spin_lock_bh(&sdata->u.nan.func_lock);
2254
2255         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2256                 funcs[i++] = func;
2257
2258         spin_unlock_bh(&sdata->u.nan.func_lock);
2259
2260         for (i = 0; funcs[i]; i++) {
2261                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2262                 if (WARN_ON(res))
2263                         ieee80211_nan_func_terminated(&sdata->vif,
2264                                                       funcs[i]->instance_id,
2265                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2266                                                       GFP_KERNEL);
2267         }
2268
2269         kfree(funcs);
2270
2271         return 0;
2272 }
2273
2274 int ieee80211_reconfig(struct ieee80211_local *local)
2275 {
2276         struct ieee80211_hw *hw = &local->hw;
2277         struct ieee80211_sub_if_data *sdata;
2278         struct ieee80211_chanctx *ctx;
2279         struct sta_info *sta;
2280         int res, i;
2281         bool reconfig_due_to_wowlan = false;
2282         struct ieee80211_sub_if_data *sched_scan_sdata;
2283         struct cfg80211_sched_scan_request *sched_scan_req;
2284         bool sched_scan_stopped = false;
2285         bool suspended = local->suspended;
2286
2287         /* nothing to do if HW shouldn't run */
2288         if (!local->open_count)
2289                 goto wake_up;
2290
2291 #ifdef CONFIG_PM
2292         if (suspended)
2293                 local->resuming = true;
2294
2295         if (local->wowlan) {
2296                 /*
2297                  * In the wowlan case, both mac80211 and the device
2298                  * are functional when the resume op is called, so
2299                  * clear local->suspended so the device could operate
2300                  * normally (e.g. pass rx frames).
2301                  */
2302                 local->suspended = false;
2303                 res = drv_resume(local);
2304                 local->wowlan = false;
2305                 if (res < 0) {
2306                         local->resuming = false;
2307                         return res;
2308                 }
2309                 if (res == 0)
2310                         goto wake_up;
2311                 WARN_ON(res > 1);
2312                 /*
2313                  * res is 1, which means the driver requested
2314                  * to go through a regular reset on wakeup.
2315                  * restore local->suspended in this case.
2316                  */
2317                 reconfig_due_to_wowlan = true;
2318                 local->suspended = true;
2319         }
2320 #endif
2321
2322         /*
2323          * In case of hw_restart during suspend (without wowlan),
2324          * cancel restart work, as we are reconfiguring the device
2325          * anyway.
2326          * Note that restart_work is scheduled on a frozen workqueue,
2327          * so we can't deadlock in this case.
2328          */
2329         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2330                 cancel_work_sync(&local->restart_work);
2331
2332         local->started = false;
2333
2334         /*
2335          * Upon resume hardware can sometimes be goofy due to
2336          * various platform / driver / bus issues, so restarting
2337          * the device may at times not work immediately. Propagate
2338          * the error.
2339          */
2340         res = drv_start(local);
2341         if (res) {
2342                 if (suspended)
2343                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2344                 else
2345                         WARN(1, "Hardware became unavailable during restart.\n");
2346                 ieee80211_handle_reconfig_failure(local);
2347                 return res;
2348         }
2349
2350         /* setup fragmentation threshold */
2351         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2352
2353         /* setup RTS threshold */
2354         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2355
2356         /* reset coverage class */
2357         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2358
2359         ieee80211_led_radio(local, true);
2360         ieee80211_mod_tpt_led_trig(local,
2361                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2362
2363         /* add interfaces */
2364         sdata = rtnl_dereference(local->monitor_sdata);
2365         if (sdata) {
2366                 /* in HW restart it exists already */
2367                 WARN_ON(local->resuming);
2368                 res = drv_add_interface(local, sdata);
2369                 if (WARN_ON(res)) {
2370                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2371                         synchronize_net();
2372                         kfree(sdata);
2373                 }
2374         }
2375
2376         list_for_each_entry(sdata, &local->interfaces, list) {
2377                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2378                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2379                     ieee80211_sdata_running(sdata)) {
2380                         res = drv_add_interface(local, sdata);
2381                         if (WARN_ON(res))
2382                                 break;
2383                 }
2384         }
2385
2386         /* If adding any of the interfaces failed above, roll back and
2387          * report failure.
2388          */
2389         if (res) {
2390                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2391                                                      list)
2392                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2393                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2394                             ieee80211_sdata_running(sdata))
2395                                 drv_remove_interface(local, sdata);
2396                 ieee80211_handle_reconfig_failure(local);
2397                 return res;
2398         }
2399
2400         /* add channel contexts */
2401         if (local->use_chanctx) {
2402                 mutex_lock(&local->chanctx_mtx);
2403                 list_for_each_entry(ctx, &local->chanctx_list, list)
2404                         if (ctx->replace_state !=
2405                             IEEE80211_CHANCTX_REPLACES_OTHER)
2406                                 WARN_ON(drv_add_chanctx(local, ctx));
2407                 mutex_unlock(&local->chanctx_mtx);
2408
2409                 sdata = rtnl_dereference(local->monitor_sdata);
2410                 if (sdata && ieee80211_sdata_running(sdata))
2411                         ieee80211_assign_chanctx(local, sdata);
2412         }
2413
2414         /* reconfigure hardware */
2415         ieee80211_hw_config(local, ~0);
2416
2417         ieee80211_configure_filter(local);
2418
2419         /* Finally also reconfigure all the BSS information */
2420         list_for_each_entry(sdata, &local->interfaces, list) {
2421                 u32 changed;
2422
2423                 if (!ieee80211_sdata_running(sdata))
2424                         continue;
2425
2426                 ieee80211_assign_chanctx(local, sdata);
2427
2428                 switch (sdata->vif.type) {
2429                 case NL80211_IFTYPE_AP_VLAN:
2430                 case NL80211_IFTYPE_MONITOR:
2431                         break;
2432                 case NL80211_IFTYPE_ADHOC:
2433                         if (sdata->vif.bss_conf.ibss_joined)
2434                                 WARN_ON(drv_join_ibss(local, sdata));
2435                         fallthrough;
2436                 default:
2437                         ieee80211_reconfig_stations(sdata);
2438                         fallthrough;
2439                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2440                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2441                                 drv_conf_tx(local, sdata, i,
2442                                             &sdata->tx_conf[i]);
2443                         break;
2444                 }
2445
2446                 /* common change flags for all interface types */
2447                 changed = BSS_CHANGED_ERP_CTS_PROT |
2448                           BSS_CHANGED_ERP_PREAMBLE |
2449                           BSS_CHANGED_ERP_SLOT |
2450                           BSS_CHANGED_HT |
2451                           BSS_CHANGED_BASIC_RATES |
2452                           BSS_CHANGED_BEACON_INT |
2453                           BSS_CHANGED_BSSID |
2454                           BSS_CHANGED_CQM |
2455                           BSS_CHANGED_QOS |
2456                           BSS_CHANGED_IDLE |
2457                           BSS_CHANGED_TXPOWER |
2458                           BSS_CHANGED_MCAST_RATE;
2459
2460                 if (sdata->vif.mu_mimo_owner)
2461                         changed |= BSS_CHANGED_MU_GROUPS;
2462
2463                 switch (sdata->vif.type) {
2464                 case NL80211_IFTYPE_STATION:
2465                         changed |= BSS_CHANGED_ASSOC |
2466                                    BSS_CHANGED_ARP_FILTER |
2467                                    BSS_CHANGED_PS;
2468
2469                         /* Re-send beacon info report to the driver */
2470                         if (sdata->u.mgd.have_beacon)
2471                                 changed |= BSS_CHANGED_BEACON_INFO;
2472
2473                         if (sdata->vif.bss_conf.max_idle_period ||
2474                             sdata->vif.bss_conf.protected_keep_alive)
2475                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2476
2477                         sdata_lock(sdata);
2478                         ieee80211_bss_info_change_notify(sdata, changed);
2479                         sdata_unlock(sdata);
2480                         break;
2481                 case NL80211_IFTYPE_OCB:
2482                         changed |= BSS_CHANGED_OCB;
2483                         ieee80211_bss_info_change_notify(sdata, changed);
2484                         break;
2485                 case NL80211_IFTYPE_ADHOC:
2486                         changed |= BSS_CHANGED_IBSS;
2487                         fallthrough;
2488                 case NL80211_IFTYPE_AP:
2489                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2490
2491                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2492                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2493                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2494                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2495
2496                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2497                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2498
2499                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2500                                         drv_start_ap(local, sdata);
2501                         }
2502                         fallthrough;
2503                 case NL80211_IFTYPE_MESH_POINT:
2504                         if (sdata->vif.bss_conf.enable_beacon) {
2505                                 changed |= BSS_CHANGED_BEACON |
2506                                            BSS_CHANGED_BEACON_ENABLED;
2507                                 ieee80211_bss_info_change_notify(sdata, changed);
2508                         }
2509                         break;
2510                 case NL80211_IFTYPE_NAN:
2511                         res = ieee80211_reconfig_nan(sdata);
2512                         if (res < 0) {
2513                                 ieee80211_handle_reconfig_failure(local);
2514                                 return res;
2515                         }
2516                         break;
2517                 case NL80211_IFTYPE_AP_VLAN:
2518                 case NL80211_IFTYPE_MONITOR:
2519                 case NL80211_IFTYPE_P2P_DEVICE:
2520                         /* nothing to do */
2521                         break;
2522                 case NL80211_IFTYPE_UNSPECIFIED:
2523                 case NUM_NL80211_IFTYPES:
2524                 case NL80211_IFTYPE_P2P_CLIENT:
2525                 case NL80211_IFTYPE_P2P_GO:
2526                 case NL80211_IFTYPE_WDS:
2527                         WARN_ON(1);
2528                         break;
2529                 }
2530         }
2531
2532         ieee80211_recalc_ps(local);
2533
2534         /*
2535          * The sta might be in psm against the ap (e.g. because
2536          * this was the state before a hw restart), so we
2537          * explicitly send a null packet in order to make sure
2538          * it'll sync against the ap (and get out of psm).
2539          */
2540         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2541                 list_for_each_entry(sdata, &local->interfaces, list) {
2542                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2543                                 continue;
2544                         if (!sdata->u.mgd.associated)
2545                                 continue;
2546
2547                         ieee80211_send_nullfunc(local, sdata, false);
2548                 }
2549         }
2550
2551         /* APs are now beaconing, add back stations */
2552         mutex_lock(&local->sta_mtx);
2553         list_for_each_entry(sta, &local->sta_list, list) {
2554                 enum ieee80211_sta_state state;
2555
2556                 if (!sta->uploaded)
2557                         continue;
2558
2559                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2560                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2561                         continue;
2562
2563                 for (state = IEEE80211_STA_NOTEXIST;
2564                      state < sta->sta_state; state++)
2565                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2566                                               state + 1));
2567         }
2568         mutex_unlock(&local->sta_mtx);
2569
2570         /* add back keys */
2571         list_for_each_entry(sdata, &local->interfaces, list)
2572                 ieee80211_reenable_keys(sdata);
2573
2574         /* Reconfigure sched scan if it was interrupted by FW restart */
2575         mutex_lock(&local->mtx);
2576         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2577                                                 lockdep_is_held(&local->mtx));
2578         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2579                                                 lockdep_is_held(&local->mtx));
2580         if (sched_scan_sdata && sched_scan_req)
2581                 /*
2582                  * Sched scan stopped, but we don't want to report it. Instead,
2583                  * we're trying to reschedule. However, if more than one scan
2584                  * plan was set, we cannot reschedule since we don't know which
2585                  * scan plan was currently running (and some scan plans may have
2586                  * already finished).
2587                  */
2588                 if (sched_scan_req->n_scan_plans > 1 ||
2589                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2590                                                          sched_scan_req)) {
2591                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2592                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2593                         sched_scan_stopped = true;
2594                 }
2595         mutex_unlock(&local->mtx);
2596
2597         if (sched_scan_stopped)
2598                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2599
2600  wake_up:
2601
2602         if (local->monitors == local->open_count && local->monitors > 0)
2603                 ieee80211_add_virtual_monitor(local);
2604
2605         /*
2606          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2607          * sessions can be established after a resume.
2608          *
2609          * Also tear down aggregation sessions since reconfiguring
2610          * them in a hardware restart scenario is not easily done
2611          * right now, and the hardware will have lost information
2612          * about the sessions, but we and the AP still think they
2613          * are active. This is really a workaround though.
2614          */
2615         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2616                 mutex_lock(&local->sta_mtx);
2617
2618                 list_for_each_entry(sta, &local->sta_list, list) {
2619                         if (!local->resuming)
2620                                 ieee80211_sta_tear_down_BA_sessions(
2621                                                 sta, AGG_STOP_LOCAL_REQUEST);
2622                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2623                 }
2624
2625                 mutex_unlock(&local->sta_mtx);
2626         }
2627
2628         if (local->in_reconfig) {
2629                 local->in_reconfig = false;
2630                 barrier();
2631
2632                 /* Restart deferred ROCs */
2633                 mutex_lock(&local->mtx);
2634                 ieee80211_start_next_roc(local);
2635                 mutex_unlock(&local->mtx);
2636
2637                 /* Requeue all works */
2638                 list_for_each_entry(sdata, &local->interfaces, list)
2639                         ieee80211_queue_work(&local->hw, &sdata->work);
2640         }
2641
2642         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2643                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2644                                         false);
2645
2646         /*
2647          * If this is for hw restart things are still running.
2648          * We may want to change that later, however.
2649          */
2650         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2651                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2652
2653         if (!suspended)
2654                 return 0;
2655
2656 #ifdef CONFIG_PM
2657         /* first set suspended false, then resuming */
2658         local->suspended = false;
2659         mb();
2660         local->resuming = false;
2661
2662         ieee80211_flush_completed_scan(local, false);
2663
2664         if (local->open_count && !reconfig_due_to_wowlan)
2665                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2666
2667         list_for_each_entry(sdata, &local->interfaces, list) {
2668                 if (!ieee80211_sdata_running(sdata))
2669                         continue;
2670                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2671                         ieee80211_sta_restart(sdata);
2672         }
2673
2674         mod_timer(&local->sta_cleanup, jiffies + 1);
2675 #else
2676         WARN_ON(1);
2677 #endif
2678
2679         return 0;
2680 }
2681
2682 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2683 {
2684         struct ieee80211_sub_if_data *sdata;
2685         struct ieee80211_local *local;
2686         struct ieee80211_key *key;
2687
2688         if (WARN_ON(!vif))
2689                 return;
2690
2691         sdata = vif_to_sdata(vif);
2692         local = sdata->local;
2693
2694         if (WARN_ON(!local->resuming))
2695                 return;
2696
2697         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2698                 return;
2699
2700         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2701
2702         mutex_lock(&local->key_mtx);
2703         list_for_each_entry(key, &sdata->key_list, list)
2704                 key->flags |= KEY_FLAG_TAINTED;
2705         mutex_unlock(&local->key_mtx);
2706 }
2707 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2708
2709 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2710 {
2711         struct ieee80211_local *local = sdata->local;
2712         struct ieee80211_chanctx_conf *chanctx_conf;
2713         struct ieee80211_chanctx *chanctx;
2714
2715         mutex_lock(&local->chanctx_mtx);
2716
2717         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2718                                         lockdep_is_held(&local->chanctx_mtx));
2719
2720         /*
2721          * This function can be called from a work, thus it may be possible
2722          * that the chanctx_conf is removed (due to a disconnection, for
2723          * example).
2724          * So nothing should be done in such case.
2725          */
2726         if (!chanctx_conf)
2727                 goto unlock;
2728
2729         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2730         ieee80211_recalc_smps_chanctx(local, chanctx);
2731  unlock:
2732         mutex_unlock(&local->chanctx_mtx);
2733 }
2734
2735 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2736 {
2737         struct ieee80211_local *local = sdata->local;
2738         struct ieee80211_chanctx_conf *chanctx_conf;
2739         struct ieee80211_chanctx *chanctx;
2740
2741         mutex_lock(&local->chanctx_mtx);
2742
2743         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2744                                         lockdep_is_held(&local->chanctx_mtx));
2745
2746         if (WARN_ON_ONCE(!chanctx_conf))
2747                 goto unlock;
2748
2749         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2750         ieee80211_recalc_chanctx_min_def(local, chanctx);
2751  unlock:
2752         mutex_unlock(&local->chanctx_mtx);
2753 }
2754
2755 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2756 {
2757         size_t pos = offset;
2758
2759         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2760                 pos += 2 + ies[pos + 1];
2761
2762         return pos;
2763 }
2764
2765 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2766                                             int rssi_min_thold,
2767                                             int rssi_max_thold)
2768 {
2769         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2770
2771         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2772                 return;
2773
2774         /*
2775          * Scale up threshold values before storing it, as the RSSI averaging
2776          * algorithm uses a scaled up value as well. Change this scaling
2777          * factor if the RSSI averaging algorithm changes.
2778          */
2779         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2780         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2781 }
2782
2783 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2784                                     int rssi_min_thold,
2785                                     int rssi_max_thold)
2786 {
2787         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2788
2789         WARN_ON(rssi_min_thold == rssi_max_thold ||
2790                 rssi_min_thold > rssi_max_thold);
2791
2792         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2793                                        rssi_max_thold);
2794 }
2795 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2796
2797 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2798 {
2799         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2800
2801         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2802 }
2803 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2804
2805 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2806                               u16 cap)
2807 {
2808         __le16 tmp;
2809
2810         *pos++ = WLAN_EID_HT_CAPABILITY;
2811         *pos++ = sizeof(struct ieee80211_ht_cap);
2812         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2813
2814         /* capability flags */
2815         tmp = cpu_to_le16(cap);
2816         memcpy(pos, &tmp, sizeof(u16));
2817         pos += sizeof(u16);
2818
2819         /* AMPDU parameters */
2820         *pos++ = ht_cap->ampdu_factor |
2821                  (ht_cap->ampdu_density <<
2822                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2823
2824         /* MCS set */
2825         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2826         pos += sizeof(ht_cap->mcs);
2827
2828         /* extended capabilities */
2829         pos += sizeof(__le16);
2830
2831         /* BF capabilities */
2832         pos += sizeof(__le32);
2833
2834         /* antenna selection */
2835         pos += sizeof(u8);
2836
2837         return pos;
2838 }
2839
2840 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2841                                u32 cap)
2842 {
2843         __le32 tmp;
2844
2845         *pos++ = WLAN_EID_VHT_CAPABILITY;
2846         *pos++ = sizeof(struct ieee80211_vht_cap);
2847         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2848
2849         /* capability flags */
2850         tmp = cpu_to_le32(cap);
2851         memcpy(pos, &tmp, sizeof(u32));
2852         pos += sizeof(u32);
2853
2854         /* VHT MCS set */
2855         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2856         pos += sizeof(vht_cap->vht_mcs);
2857
2858         return pos;
2859 }
2860
2861 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2862 {
2863         const struct ieee80211_sta_he_cap *he_cap;
2864         struct ieee80211_supported_band *sband;
2865         u8 n;
2866
2867         sband = ieee80211_get_sband(sdata);
2868         if (!sband)
2869                 return 0;
2870
2871         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2872         if (!he_cap)
2873                 return 0;
2874
2875         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2876         return 2 + 1 +
2877                sizeof(he_cap->he_cap_elem) + n +
2878                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2879                                      he_cap->he_cap_elem.phy_cap_info);
2880 }
2881
2882 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2883                               const struct ieee80211_sta_he_cap *he_cap,
2884                               u8 *end)
2885 {
2886         u8 n;
2887         u8 ie_len;
2888         u8 *orig_pos = pos;
2889
2890         /* Make sure we have place for the IE */
2891         /*
2892          * TODO: the 1 added is because this temporarily is under the EXTENSION
2893          * IE. Get rid of it when it moves.
2894          */
2895         if (!he_cap)
2896                 return orig_pos;
2897
2898         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2899         ie_len = 2 + 1 +
2900                  sizeof(he_cap->he_cap_elem) + n +
2901                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2902                                        he_cap->he_cap_elem.phy_cap_info);
2903
2904         if ((end - pos) < ie_len)
2905                 return orig_pos;
2906
2907         *pos++ = WLAN_EID_EXTENSION;
2908         pos++; /* We'll set the size later below */
2909         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2910
2911         /* Fixed data */
2912         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2913         pos += sizeof(he_cap->he_cap_elem);
2914
2915         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2916         pos += n;
2917
2918         /* Check if PPE Threshold should be present */
2919         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2920              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2921                 goto end;
2922
2923         /*
2924          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2925          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2926          */
2927         n = hweight8(he_cap->ppe_thres[0] &
2928                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2929         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2930                    IEEE80211_PPE_THRES_NSS_POS));
2931
2932         /*
2933          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2934          * total size.
2935          */
2936         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2937         n = DIV_ROUND_UP(n, 8);
2938
2939         /* Copy PPE Thresholds */
2940         memcpy(pos, &he_cap->ppe_thres, n);
2941         pos += n;
2942
2943 end:
2944         orig_pos[1] = (pos - orig_pos) - 2;
2945         return pos;
2946 }
2947
2948 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2949                                     struct sk_buff *skb)
2950 {
2951         struct ieee80211_supported_band *sband;
2952         const struct ieee80211_sband_iftype_data *iftd;
2953         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2954         u8 *pos;
2955         u16 cap;
2956
2957         sband = ieee80211_get_sband(sdata);
2958         if (!sband)
2959                 return;
2960
2961         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2962         if (WARN_ON(!iftd))
2963                 return;
2964
2965         /* Check for device HE 6 GHz capability before adding element */
2966         if (!iftd->he_6ghz_capa.capa)
2967                 return;
2968
2969         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2970         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2971
2972         switch (sdata->smps_mode) {
2973         case IEEE80211_SMPS_AUTOMATIC:
2974         case IEEE80211_SMPS_NUM_MODES:
2975                 WARN_ON(1);
2976                 fallthrough;
2977         case IEEE80211_SMPS_OFF:
2978                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2979                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2980                 break;
2981         case IEEE80211_SMPS_STATIC:
2982                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2983                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2984                 break;
2985         case IEEE80211_SMPS_DYNAMIC:
2986                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2987                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2988                 break;
2989         }
2990
2991         pos = skb_put(skb, 2 + 1 + sizeof(cap));
2992         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
2993                                     pos + 2 + 1 + sizeof(cap));
2994 }
2995
2996 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2997                                const struct cfg80211_chan_def *chandef,
2998                                u16 prot_mode, bool rifs_mode)
2999 {
3000         struct ieee80211_ht_operation *ht_oper;
3001         /* Build HT Information */
3002         *pos++ = WLAN_EID_HT_OPERATION;
3003         *pos++ = sizeof(struct ieee80211_ht_operation);
3004         ht_oper = (struct ieee80211_ht_operation *)pos;
3005         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3006                                         chandef->chan->center_freq);
3007         switch (chandef->width) {
3008         case NL80211_CHAN_WIDTH_160:
3009         case NL80211_CHAN_WIDTH_80P80:
3010         case NL80211_CHAN_WIDTH_80:
3011         case NL80211_CHAN_WIDTH_40:
3012                 if (chandef->center_freq1 > chandef->chan->center_freq)
3013                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3014                 else
3015                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3016                 break;
3017         default:
3018                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3019                 break;
3020         }
3021         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3022             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3023             chandef->width != NL80211_CHAN_WIDTH_20)
3024                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3025
3026         if (rifs_mode)
3027                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3028
3029         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3030         ht_oper->stbc_param = 0x0000;
3031
3032         /* It seems that Basic MCS set and Supported MCS set
3033            are identical for the first 10 bytes */
3034         memset(&ht_oper->basic_set, 0, 16);
3035         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3036
3037         return pos + sizeof(struct ieee80211_ht_operation);
3038 }
3039
3040 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3041                                    const struct cfg80211_chan_def *chandef)
3042 {
3043         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3044         *pos++ = 3;                                     /* IE length */
3045         /* New channel width */
3046         switch (chandef->width) {
3047         case NL80211_CHAN_WIDTH_80:
3048                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3049                 break;
3050         case NL80211_CHAN_WIDTH_160:
3051                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3052                 break;
3053         case NL80211_CHAN_WIDTH_80P80:
3054                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3055                 break;
3056         default:
3057                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3058         }
3059
3060         /* new center frequency segment 0 */
3061         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3062         /* new center frequency segment 1 */
3063         if (chandef->center_freq2)
3064                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3065         else
3066                 *pos++ = 0;
3067 }
3068
3069 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3070                                 const struct cfg80211_chan_def *chandef)
3071 {
3072         struct ieee80211_vht_operation *vht_oper;
3073
3074         *pos++ = WLAN_EID_VHT_OPERATION;
3075         *pos++ = sizeof(struct ieee80211_vht_operation);
3076         vht_oper = (struct ieee80211_vht_operation *)pos;
3077         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3078                                                         chandef->center_freq1);
3079         if (chandef->center_freq2)
3080                 vht_oper->center_freq_seg1_idx =
3081                         ieee80211_frequency_to_channel(chandef->center_freq2);
3082         else
3083                 vht_oper->center_freq_seg1_idx = 0x00;
3084
3085         switch (chandef->width) {
3086         case NL80211_CHAN_WIDTH_160:
3087                 /*
3088                  * Convert 160 MHz channel width to new style as interop
3089                  * workaround.
3090                  */
3091                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3092                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3093                 if (chandef->chan->center_freq < chandef->center_freq1)
3094                         vht_oper->center_freq_seg0_idx -= 8;
3095                 else
3096                         vht_oper->center_freq_seg0_idx += 8;
3097                 break;
3098         case NL80211_CHAN_WIDTH_80P80:
3099                 /*
3100                  * Convert 80+80 MHz channel width to new style as interop
3101                  * workaround.
3102                  */
3103                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3104                 break;
3105         case NL80211_CHAN_WIDTH_80:
3106                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3107                 break;
3108         default:
3109                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3110                 break;
3111         }
3112
3113         /* don't require special VHT peer rates */
3114         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3115
3116         return pos + sizeof(struct ieee80211_vht_operation);
3117 }
3118
3119 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3120 {
3121         struct ieee80211_he_operation *he_oper;
3122         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3123         u32 he_oper_params;
3124         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3125
3126         if (chandef->chan->band == NL80211_BAND_6GHZ)
3127                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3128
3129         *pos++ = WLAN_EID_EXTENSION;
3130         *pos++ = ie_len;
3131         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3132
3133         he_oper_params = 0;
3134         he_oper_params |= u32_encode_bits(1023, /* disabled */
3135                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3136         he_oper_params |= u32_encode_bits(1,
3137                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3138         he_oper_params |= u32_encode_bits(1,
3139                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3140         if (chandef->chan->band == NL80211_BAND_6GHZ)
3141                 he_oper_params |= u32_encode_bits(1,
3142                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3143
3144         he_oper = (struct ieee80211_he_operation *)pos;
3145         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3146
3147         /* don't require special HE peer rates */
3148         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3149         pos += sizeof(struct ieee80211_he_operation);
3150
3151         if (chandef->chan->band != NL80211_BAND_6GHZ)
3152                 goto out;
3153
3154         /* TODO add VHT operational */
3155         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3156         he_6ghz_op->minrate = 6; /* 6 Mbps */
3157         he_6ghz_op->primary =
3158                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3159         he_6ghz_op->ccfs0 =
3160                 ieee80211_frequency_to_channel(chandef->center_freq1);
3161         if (chandef->center_freq2)
3162                 he_6ghz_op->ccfs1 =
3163                         ieee80211_frequency_to_channel(chandef->center_freq2);
3164         else
3165                 he_6ghz_op->ccfs1 = 0;
3166
3167         switch (chandef->width) {
3168         case NL80211_CHAN_WIDTH_160:
3169                 /* Convert 160 MHz channel width to new style as interop
3170                  * workaround.
3171                  */
3172                 he_6ghz_op->control =
3173                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3174                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3175                 if (chandef->chan->center_freq < chandef->center_freq1)
3176                         he_6ghz_op->ccfs0 -= 8;
3177                 else
3178                         he_6ghz_op->ccfs0 += 8;
3179                 fallthrough;
3180         case NL80211_CHAN_WIDTH_80P80:
3181                 he_6ghz_op->control =
3182                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3183                 break;
3184         case NL80211_CHAN_WIDTH_80:
3185                 he_6ghz_op->control =
3186                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3187                 break;
3188         case NL80211_CHAN_WIDTH_40:
3189                 he_6ghz_op->control =
3190                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3191                 break;
3192         default:
3193                 he_6ghz_op->control =
3194                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3195                 break;
3196         }
3197
3198         pos += sizeof(struct ieee80211_he_6ghz_oper);
3199
3200 out:
3201         return pos;
3202 }
3203
3204 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3205                                struct cfg80211_chan_def *chandef)
3206 {
3207         enum nl80211_channel_type channel_type;
3208
3209         if (!ht_oper)
3210                 return false;
3211
3212         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3213         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3214                 channel_type = NL80211_CHAN_HT20;
3215                 break;
3216         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3217                 channel_type = NL80211_CHAN_HT40PLUS;
3218                 break;
3219         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3220                 channel_type = NL80211_CHAN_HT40MINUS;
3221                 break;
3222         default:
3223                 channel_type = NL80211_CHAN_NO_HT;
3224                 return false;
3225         }
3226
3227         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3228         return true;
3229 }
3230
3231 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3232                                 const struct ieee80211_vht_operation *oper,
3233                                 const struct ieee80211_ht_operation *htop,
3234                                 struct cfg80211_chan_def *chandef)
3235 {
3236         struct cfg80211_chan_def new = *chandef;
3237         int cf0, cf1;
3238         int ccfs0, ccfs1, ccfs2;
3239         int ccf0, ccf1;
3240         u32 vht_cap;
3241         bool support_80_80 = false;
3242         bool support_160 = false;
3243         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3244                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3245         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3246                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3247
3248         if (!oper || !htop)
3249                 return false;
3250
3251         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3252         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3253                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3254         support_80_80 = ((vht_cap &
3255                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3256                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3257                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3258                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3259                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3260         ccfs0 = oper->center_freq_seg0_idx;
3261         ccfs1 = oper->center_freq_seg1_idx;
3262         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3263                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3264                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3265
3266         ccf0 = ccfs0;
3267
3268         /* if not supported, parse as though we didn't understand it */
3269         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3270                 ext_nss_bw_supp = 0;
3271
3272         /*
3273          * Cf. IEEE 802.11 Table 9-250
3274          *
3275          * We really just consider that because it's inefficient to connect
3276          * at a higher bandwidth than we'll actually be able to use.
3277          */
3278         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3279         default:
3280         case 0x00:
3281                 ccf1 = 0;
3282                 support_160 = false;
3283                 support_80_80 = false;
3284                 break;
3285         case 0x01:
3286                 support_80_80 = false;
3287                 fallthrough;
3288         case 0x02:
3289         case 0x03:
3290                 ccf1 = ccfs2;
3291                 break;
3292         case 0x10:
3293                 ccf1 = ccfs1;
3294                 break;
3295         case 0x11:
3296         case 0x12:
3297                 if (!ccfs1)
3298                         ccf1 = ccfs2;
3299                 else
3300                         ccf1 = ccfs1;
3301                 break;
3302         case 0x13:
3303         case 0x20:
3304         case 0x23:
3305                 ccf1 = ccfs1;
3306                 break;
3307         }
3308
3309         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3310         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3311
3312         switch (oper->chan_width) {
3313         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3314                 /* just use HT information directly */
3315                 break;
3316         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3317                 new.width = NL80211_CHAN_WIDTH_80;
3318                 new.center_freq1 = cf0;
3319                 /* If needed, adjust based on the newer interop workaround. */
3320                 if (ccf1) {
3321                         unsigned int diff;
3322
3323                         diff = abs(ccf1 - ccf0);
3324                         if ((diff == 8) && support_160) {
3325                                 new.width = NL80211_CHAN_WIDTH_160;
3326                                 new.center_freq1 = cf1;
3327                         } else if ((diff > 8) && support_80_80) {
3328                                 new.width = NL80211_CHAN_WIDTH_80P80;
3329                                 new.center_freq2 = cf1;
3330                         }
3331                 }
3332                 break;
3333         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3334                 /* deprecated encoding */
3335                 new.width = NL80211_CHAN_WIDTH_160;
3336                 new.center_freq1 = cf0;
3337                 break;
3338         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3339                 /* deprecated encoding */
3340                 new.width = NL80211_CHAN_WIDTH_80P80;
3341                 new.center_freq1 = cf0;
3342                 new.center_freq2 = cf1;
3343                 break;
3344         default:
3345                 return false;
3346         }
3347
3348         if (!cfg80211_chandef_valid(&new))
3349                 return false;
3350
3351         *chandef = new;
3352         return true;
3353 }
3354
3355 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3356                                     const struct ieee80211_he_operation *he_oper,
3357                                     struct cfg80211_chan_def *chandef)
3358 {
3359         struct ieee80211_local *local = sdata->local;
3360         struct ieee80211_supported_band *sband;
3361         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3362         const struct ieee80211_sta_he_cap *he_cap;
3363         struct cfg80211_chan_def he_chandef = *chandef;
3364         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3365         bool support_80_80, support_160;
3366         u8 he_phy_cap;
3367         u32 freq;
3368
3369         if (chandef->chan->band != NL80211_BAND_6GHZ)
3370                 return true;
3371
3372         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3373
3374         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3375         if (!he_cap) {
3376                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3377                 return false;
3378         }
3379
3380         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3381         support_160 =
3382                 he_phy_cap &
3383                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3384         support_80_80 =
3385                 he_phy_cap &
3386                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3387
3388         if (!he_oper) {
3389                 sdata_info(sdata,
3390                            "HE is not advertised on (on %d MHz), expect issues\n",
3391                            chandef->chan->center_freq);
3392                 return false;
3393         }
3394
3395         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3396
3397         if (!he_6ghz_oper) {
3398                 sdata_info(sdata,
3399                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3400                            chandef->chan->center_freq);
3401                 return false;
3402         }
3403
3404         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3405                                               NL80211_BAND_6GHZ);
3406         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3407
3408         switch (u8_get_bits(he_6ghz_oper->control,
3409                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3410         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3411                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3412                 break;
3413         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3414                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3415                 break;
3416         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3417                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3418                 break;
3419         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3420                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3421                 if (!he_6ghz_oper->ccfs1)
3422                         break;
3423                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3424                         if (support_160)
3425                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3426                 } else {
3427                         if (support_80_80)
3428                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3429                 }
3430                 break;
3431         }
3432
3433         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3434                 he_chandef.center_freq1 =
3435                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3436                                                        NL80211_BAND_6GHZ);
3437         } else {
3438                 he_chandef.center_freq1 =
3439                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3440                                                        NL80211_BAND_6GHZ);
3441                 if (support_80_80 || support_160)
3442                         he_chandef.center_freq2 =
3443                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3444                                                                NL80211_BAND_6GHZ);
3445         }
3446
3447         if (!cfg80211_chandef_valid(&he_chandef)) {
3448                 sdata_info(sdata,
3449                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3450                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3451                            he_chandef.width,
3452                            he_chandef.center_freq1,
3453                            he_chandef.center_freq2);
3454                 return false;
3455         }
3456
3457         *chandef = he_chandef;
3458
3459         return true;
3460 }
3461
3462 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3463                                 struct cfg80211_chan_def *chandef)
3464 {
3465         u32 oper_freq;
3466
3467         if (!oper)
3468                 return false;
3469
3470         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3471         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3472                 chandef->width = NL80211_CHAN_WIDTH_1;
3473                 break;
3474         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3475                 chandef->width = NL80211_CHAN_WIDTH_2;
3476                 break;
3477         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3478                 chandef->width = NL80211_CHAN_WIDTH_4;
3479                 break;
3480         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3481                 chandef->width = NL80211_CHAN_WIDTH_8;
3482                 break;
3483         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3484                 chandef->width = NL80211_CHAN_WIDTH_16;
3485                 break;
3486         default:
3487                 return false;
3488         }
3489
3490         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3491                                                   NL80211_BAND_S1GHZ);
3492         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3493         chandef->freq1_offset = oper_freq % 1000;
3494
3495         return true;
3496 }
3497
3498 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3499                              const struct ieee80211_supported_band *sband,
3500                              const u8 *srates, int srates_len, u32 *rates)
3501 {
3502         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3503         int shift = ieee80211_chandef_get_shift(chandef);
3504         struct ieee80211_rate *br;
3505         int brate, rate, i, j, count = 0;
3506
3507         *rates = 0;
3508
3509         for (i = 0; i < srates_len; i++) {
3510                 rate = srates[i] & 0x7f;
3511
3512                 for (j = 0; j < sband->n_bitrates; j++) {
3513                         br = &sband->bitrates[j];
3514                         if ((rate_flags & br->flags) != rate_flags)
3515                                 continue;
3516
3517                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3518                         if (brate == rate) {
3519                                 *rates |= BIT(j);
3520                                 count++;
3521                                 break;
3522                         }
3523                 }
3524         }
3525         return count;
3526 }
3527
3528 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3529                             struct sk_buff *skb, bool need_basic,
3530                             enum nl80211_band band)
3531 {
3532         struct ieee80211_local *local = sdata->local;
3533         struct ieee80211_supported_band *sband;
3534         int rate, shift;
3535         u8 i, rates, *pos;
3536         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3537         u32 rate_flags;
3538
3539         shift = ieee80211_vif_get_shift(&sdata->vif);
3540         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3541         sband = local->hw.wiphy->bands[band];
3542         rates = 0;
3543         for (i = 0; i < sband->n_bitrates; i++) {
3544                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3545                         continue;
3546                 rates++;
3547         }
3548         if (rates > 8)
3549                 rates = 8;
3550
3551         if (skb_tailroom(skb) < rates + 2)
3552                 return -ENOMEM;
3553
3554         pos = skb_put(skb, rates + 2);
3555         *pos++ = WLAN_EID_SUPP_RATES;
3556         *pos++ = rates;
3557         for (i = 0; i < rates; i++) {
3558                 u8 basic = 0;
3559                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3560                         continue;
3561
3562                 if (need_basic && basic_rates & BIT(i))
3563                         basic = 0x80;
3564                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3565                                     5 * (1 << shift));
3566                 *pos++ = basic | (u8) rate;
3567         }
3568
3569         return 0;
3570 }
3571
3572 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3573                                 struct sk_buff *skb, bool need_basic,
3574                                 enum nl80211_band band)
3575 {
3576         struct ieee80211_local *local = sdata->local;
3577         struct ieee80211_supported_band *sband;
3578         int rate, shift;
3579         u8 i, exrates, *pos;
3580         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3581         u32 rate_flags;
3582
3583         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3584         shift = ieee80211_vif_get_shift(&sdata->vif);
3585
3586         sband = local->hw.wiphy->bands[band];
3587         exrates = 0;
3588         for (i = 0; i < sband->n_bitrates; i++) {
3589                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3590                         continue;
3591                 exrates++;
3592         }
3593
3594         if (exrates > 8)
3595                 exrates -= 8;
3596         else
3597                 exrates = 0;
3598
3599         if (skb_tailroom(skb) < exrates + 2)
3600                 return -ENOMEM;
3601
3602         if (exrates) {
3603                 pos = skb_put(skb, exrates + 2);
3604                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3605                 *pos++ = exrates;
3606                 for (i = 8; i < sband->n_bitrates; i++) {
3607                         u8 basic = 0;
3608                         if ((rate_flags & sband->bitrates[i].flags)
3609                             != rate_flags)
3610                                 continue;
3611                         if (need_basic && basic_rates & BIT(i))
3612                                 basic = 0x80;
3613                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3614                                             5 * (1 << shift));
3615                         *pos++ = basic | (u8) rate;
3616                 }
3617         }
3618         return 0;
3619 }
3620
3621 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3622 {
3623         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3624         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3625
3626         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3627                 /* non-managed type inferfaces */
3628                 return 0;
3629         }
3630         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3631 }
3632 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3633
3634 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3635 {
3636         if (!mcs)
3637                 return 1;
3638
3639         /* TODO: consider rx_highest */
3640
3641         if (mcs->rx_mask[3])
3642                 return 4;
3643         if (mcs->rx_mask[2])
3644                 return 3;
3645         if (mcs->rx_mask[1])
3646                 return 2;
3647         return 1;
3648 }
3649
3650 /**
3651  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3652  * @local: mac80211 hw info struct
3653  * @status: RX status
3654  * @mpdu_len: total MPDU length (including FCS)
3655  * @mpdu_offset: offset into MPDU to calculate timestamp at
3656  *
3657  * This function calculates the RX timestamp at the given MPDU offset, taking
3658  * into account what the RX timestamp was. An offset of 0 will just normalize
3659  * the timestamp to TSF at beginning of MPDU reception.
3660  */
3661 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3662                                      struct ieee80211_rx_status *status,
3663                                      unsigned int mpdu_len,
3664                                      unsigned int mpdu_offset)
3665 {
3666         u64 ts = status->mactime;
3667         struct rate_info ri;
3668         u16 rate;
3669         u8 n_ltf;
3670
3671         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3672                 return 0;
3673
3674         memset(&ri, 0, sizeof(ri));
3675
3676         ri.bw = status->bw;
3677
3678         /* Fill cfg80211 rate info */
3679         switch (status->encoding) {
3680         case RX_ENC_HE:
3681                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3682                 ri.mcs = status->rate_idx;
3683                 ri.nss = status->nss;
3684                 ri.he_ru_alloc = status->he_ru;
3685                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3686                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3687
3688                 /*
3689                  * See P802.11ax_D6.0, section 27.3.4 for
3690                  * VHT PPDU format.
3691                  */
3692                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3693                         mpdu_offset += 2;
3694                         ts += 36;
3695
3696                         /*
3697                          * TODO:
3698                          * For HE MU PPDU, add the HE-SIG-B.
3699                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3700                          * For HE TB PPDU, add 4us for the HE-STF.
3701                          * Add the HE-LTF durations - variable.
3702                          */
3703                 }
3704
3705                 break;
3706         case RX_ENC_HT:
3707                 ri.mcs = status->rate_idx;
3708                 ri.flags |= RATE_INFO_FLAGS_MCS;
3709                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3710                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3711
3712                 /*
3713                  * See P802.11REVmd_D3.0, section 19.3.2 for
3714                  * HT PPDU format.
3715                  */
3716                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3717                         mpdu_offset += 2;
3718                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3719                                 ts += 24;
3720                         else
3721                                 ts += 32;
3722
3723                         /*
3724                          * Add Data HT-LTFs per streams
3725                          * TODO: add Extension HT-LTFs, 4us per LTF
3726                          */
3727                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3728                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3729                         ts += n_ltf * 4;
3730                 }
3731
3732                 break;
3733         case RX_ENC_VHT:
3734                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3735                 ri.mcs = status->rate_idx;
3736                 ri.nss = status->nss;
3737                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3738                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3739
3740                 /*
3741                  * See P802.11REVmd_D3.0, section 21.3.2 for
3742                  * VHT PPDU format.
3743                  */
3744                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3745                         mpdu_offset += 2;
3746                         ts += 36;
3747
3748                         /*
3749                          * Add VHT-LTFs per streams
3750                          */
3751                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3752                                 ri.nss + 1 : ri.nss;
3753                         ts += 4 * n_ltf;
3754                 }
3755
3756                 break;
3757         default:
3758                 WARN_ON(1);
3759                 fallthrough;
3760         case RX_ENC_LEGACY: {
3761                 struct ieee80211_supported_band *sband;
3762                 int shift = 0;
3763                 int bitrate;
3764
3765                 switch (status->bw) {
3766                 case RATE_INFO_BW_10:
3767                         shift = 1;
3768                         break;
3769                 case RATE_INFO_BW_5:
3770                         shift = 2;
3771                         break;
3772                 }
3773
3774                 sband = local->hw.wiphy->bands[status->band];
3775                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3776                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3777
3778                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3779                         if (status->band == NL80211_BAND_5GHZ) {
3780                                 ts += 20 << shift;
3781                                 mpdu_offset += 2;
3782                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3783                                 ts += 96;
3784                         } else {
3785                                 ts += 192;
3786                         }
3787                 }
3788                 break;
3789                 }
3790         }
3791
3792         rate = cfg80211_calculate_bitrate(&ri);
3793         if (WARN_ONCE(!rate,
3794                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3795                       (unsigned long long)status->flag, status->rate_idx,
3796                       status->nss))
3797                 return 0;
3798
3799         /* rewind from end of MPDU */
3800         if (status->flag & RX_FLAG_MACTIME_END)
3801                 ts -= mpdu_len * 8 * 10 / rate;
3802
3803         ts += mpdu_offset * 8 * 10 / rate;
3804
3805         return ts;
3806 }
3807
3808 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3809 {
3810         struct ieee80211_sub_if_data *sdata;
3811         struct cfg80211_chan_def chandef;
3812
3813         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3814         lockdep_assert_wiphy(local->hw.wiphy);
3815
3816         mutex_lock(&local->mtx);
3817         list_for_each_entry(sdata, &local->interfaces, list) {
3818                 /* it might be waiting for the local->mtx, but then
3819                  * by the time it gets it, sdata->wdev.cac_started
3820                  * will no longer be true
3821                  */
3822                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3823
3824                 if (sdata->wdev.cac_started) {
3825                         chandef = sdata->vif.bss_conf.chandef;
3826                         ieee80211_vif_release_channel(sdata);
3827                         cfg80211_cac_event(sdata->dev,
3828                                            &chandef,
3829                                            NL80211_RADAR_CAC_ABORTED,
3830                                            GFP_KERNEL);
3831                 }
3832         }
3833         mutex_unlock(&local->mtx);
3834 }
3835
3836 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3837 {
3838         struct ieee80211_local *local =
3839                 container_of(work, struct ieee80211_local, radar_detected_work);
3840         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3841         struct ieee80211_chanctx *ctx;
3842         int num_chanctx = 0;
3843
3844         mutex_lock(&local->chanctx_mtx);
3845         list_for_each_entry(ctx, &local->chanctx_list, list) {
3846                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3847                         continue;
3848
3849                 num_chanctx++;
3850                 chandef = ctx->conf.def;
3851         }
3852         mutex_unlock(&local->chanctx_mtx);
3853
3854         wiphy_lock(local->hw.wiphy);
3855         ieee80211_dfs_cac_cancel(local);
3856         wiphy_unlock(local->hw.wiphy);
3857
3858         if (num_chanctx > 1)
3859                 /* XXX: multi-channel is not supported yet */
3860                 WARN_ON(1);
3861         else
3862                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3863 }
3864
3865 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3866 {
3867         struct ieee80211_local *local = hw_to_local(hw);
3868
3869         trace_api_radar_detected(local);
3870
3871         schedule_work(&local->radar_detected_work);
3872 }
3873 EXPORT_SYMBOL(ieee80211_radar_detected);
3874
3875 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3876 {
3877         u32 ret;
3878         int tmp;
3879
3880         switch (c->width) {
3881         case NL80211_CHAN_WIDTH_20:
3882                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3883                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3884                 break;
3885         case NL80211_CHAN_WIDTH_40:
3886                 c->width = NL80211_CHAN_WIDTH_20;
3887                 c->center_freq1 = c->chan->center_freq;
3888                 ret = IEEE80211_STA_DISABLE_40MHZ |
3889                       IEEE80211_STA_DISABLE_VHT;
3890                 break;
3891         case NL80211_CHAN_WIDTH_80:
3892                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3893                 /* n_P40 */
3894                 tmp /= 2;
3895                 /* freq_P40 */
3896                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3897                 c->width = NL80211_CHAN_WIDTH_40;
3898                 ret = IEEE80211_STA_DISABLE_VHT;
3899                 break;
3900         case NL80211_CHAN_WIDTH_80P80:
3901                 c->center_freq2 = 0;
3902                 c->width = NL80211_CHAN_WIDTH_80;
3903                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3904                       IEEE80211_STA_DISABLE_160MHZ;
3905                 break;
3906         case NL80211_CHAN_WIDTH_160:
3907                 /* n_P20 */
3908                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3909                 /* n_P80 */
3910                 tmp /= 4;
3911                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3912                 c->width = NL80211_CHAN_WIDTH_80;
3913                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3914                       IEEE80211_STA_DISABLE_160MHZ;
3915                 break;
3916         default:
3917         case NL80211_CHAN_WIDTH_20_NOHT:
3918                 WARN_ON_ONCE(1);
3919                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3920                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3921                 break;
3922         case NL80211_CHAN_WIDTH_1:
3923         case NL80211_CHAN_WIDTH_2:
3924         case NL80211_CHAN_WIDTH_4:
3925         case NL80211_CHAN_WIDTH_8:
3926         case NL80211_CHAN_WIDTH_16:
3927         case NL80211_CHAN_WIDTH_5:
3928         case NL80211_CHAN_WIDTH_10:
3929                 WARN_ON_ONCE(1);
3930                 /* keep c->width */
3931                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3932                 break;
3933         }
3934
3935         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3936
3937         return ret;
3938 }
3939
3940 /*
3941  * Returns true if smps_mode_new is strictly more restrictive than
3942  * smps_mode_old.
3943  */
3944 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3945                                    enum ieee80211_smps_mode smps_mode_new)
3946 {
3947         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3948                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3949                 return false;
3950
3951         switch (smps_mode_old) {
3952         case IEEE80211_SMPS_STATIC:
3953                 return false;
3954         case IEEE80211_SMPS_DYNAMIC:
3955                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3956         case IEEE80211_SMPS_OFF:
3957                 return smps_mode_new != IEEE80211_SMPS_OFF;
3958         default:
3959                 WARN_ON(1);
3960         }
3961
3962         return false;
3963 }
3964
3965 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3966                               struct cfg80211_csa_settings *csa_settings)
3967 {
3968         struct sk_buff *skb;
3969         struct ieee80211_mgmt *mgmt;
3970         struct ieee80211_local *local = sdata->local;
3971         int freq;
3972         int hdr_len = offsetofend(struct ieee80211_mgmt,
3973                                   u.action.u.chan_switch);
3974         u8 *pos;
3975
3976         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3977             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3978                 return -EOPNOTSUPP;
3979
3980         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3981                             5 + /* channel switch announcement element */
3982                             3 + /* secondary channel offset element */
3983                             5 + /* wide bandwidth channel switch announcement */
3984                             8); /* mesh channel switch parameters element */
3985         if (!skb)
3986                 return -ENOMEM;
3987
3988         skb_reserve(skb, local->tx_headroom);
3989         mgmt = skb_put_zero(skb, hdr_len);
3990         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3991                                           IEEE80211_STYPE_ACTION);
3992
3993         eth_broadcast_addr(mgmt->da);
3994         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3995         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3996                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3997         } else {
3998                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3999                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4000         }
4001         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4002         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4003         pos = skb_put(skb, 5);
4004         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4005         *pos++ = 3;                                             /* IE length */
4006         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4007         freq = csa_settings->chandef.chan->center_freq;
4008         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4009         *pos++ = csa_settings->count;                           /* count */
4010
4011         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4012                 enum nl80211_channel_type ch_type;
4013
4014                 skb_put(skb, 3);
4015                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4016                 *pos++ = 1;                                     /* IE length */
4017                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4018                 if (ch_type == NL80211_CHAN_HT40PLUS)
4019                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4020                 else
4021                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4022         }
4023
4024         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4025                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4026
4027                 skb_put(skb, 8);
4028                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4029                 *pos++ = 6;                                     /* IE length */
4030                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4031                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4032                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4033                 *pos++ |= csa_settings->block_tx ?
4034                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4035                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4036                 pos += 2;
4037                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4038                 pos += 2;
4039         }
4040
4041         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4042             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4043             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4044                 skb_put(skb, 5);
4045                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4046         }
4047
4048         ieee80211_tx_skb(sdata, skb);
4049         return 0;
4050 }
4051
4052 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4053 {
4054         return !(cs == NULL || cs->cipher == 0 ||
4055                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4056                  cs->hdr_len <= cs->key_idx_off ||
4057                  cs->key_idx_shift > 7 ||
4058                  cs->key_idx_mask == 0);
4059 }
4060
4061 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4062 {
4063         int i;
4064
4065         /* Ensure we have enough iftype bitmap space for all iftype values */
4066         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4067
4068         for (i = 0; i < n; i++)
4069                 if (!ieee80211_cs_valid(&cs[i]))
4070                         return false;
4071
4072         return true;
4073 }
4074
4075 const struct ieee80211_cipher_scheme *
4076 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4077                  enum nl80211_iftype iftype)
4078 {
4079         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4080         int n = local->hw.n_cipher_schemes;
4081         int i;
4082         const struct ieee80211_cipher_scheme *cs = NULL;
4083
4084         for (i = 0; i < n; i++) {
4085                 if (l[i].cipher == cipher) {
4086                         cs = &l[i];
4087                         break;
4088                 }
4089         }
4090
4091         if (!cs || !(cs->iftype & BIT(iftype)))
4092                 return NULL;
4093
4094         return cs;
4095 }
4096
4097 int ieee80211_cs_headroom(struct ieee80211_local *local,
4098                           struct cfg80211_crypto_settings *crypto,
4099                           enum nl80211_iftype iftype)
4100 {
4101         const struct ieee80211_cipher_scheme *cs;
4102         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4103         int i;
4104
4105         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4106                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4107                                       iftype);
4108
4109                 if (cs && headroom < cs->hdr_len)
4110                         headroom = cs->hdr_len;
4111         }
4112
4113         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4114         if (cs && headroom < cs->hdr_len)
4115                 headroom = cs->hdr_len;
4116
4117         return headroom;
4118 }
4119
4120 static bool
4121 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4122 {
4123         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4124         int skip;
4125
4126         if (end > 0)
4127                 return false;
4128
4129         /* One shot NOA  */
4130         if (data->count[i] == 1)
4131                 return false;
4132
4133         if (data->desc[i].interval == 0)
4134                 return false;
4135
4136         /* End time is in the past, check for repetitions */
4137         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4138         if (data->count[i] < 255) {
4139                 if (data->count[i] <= skip) {
4140                         data->count[i] = 0;
4141                         return false;
4142                 }
4143
4144                 data->count[i] -= skip;
4145         }
4146
4147         data->desc[i].start += skip * data->desc[i].interval;
4148
4149         return true;
4150 }
4151
4152 static bool
4153 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4154                              s32 *offset)
4155 {
4156         bool ret = false;
4157         int i;
4158
4159         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4160                 s32 cur;
4161
4162                 if (!data->count[i])
4163                         continue;
4164
4165                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4166                         ret = true;
4167
4168                 cur = data->desc[i].start - tsf;
4169                 if (cur > *offset)
4170                         continue;
4171
4172                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4173                 if (cur > *offset)
4174                         *offset = cur;
4175         }
4176
4177         return ret;
4178 }
4179
4180 static u32
4181 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4182 {
4183         s32 offset = 0;
4184         int tries = 0;
4185         /*
4186          * arbitrary limit, used to avoid infinite loops when combined NoA
4187          * descriptors cover the full time period.
4188          */
4189         int max_tries = 5;
4190
4191         ieee80211_extend_absent_time(data, tsf, &offset);
4192         do {
4193                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4194                         break;
4195
4196                 tries++;
4197         } while (tries < max_tries);
4198
4199         return offset;
4200 }
4201
4202 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4203 {
4204         u32 next_offset = BIT(31) - 1;
4205         int i;
4206
4207         data->absent = 0;
4208         data->has_next_tsf = false;
4209         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4210                 s32 start;
4211
4212                 if (!data->count[i])
4213                         continue;
4214
4215                 ieee80211_extend_noa_desc(data, tsf, i);
4216                 start = data->desc[i].start - tsf;
4217                 if (start <= 0)
4218                         data->absent |= BIT(i);
4219
4220                 if (next_offset > start)
4221                         next_offset = start;
4222
4223                 data->has_next_tsf = true;
4224         }
4225
4226         if (data->absent)
4227                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4228
4229         data->next_tsf = tsf + next_offset;
4230 }
4231 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4232
4233 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4234                             struct ieee80211_noa_data *data, u32 tsf)
4235 {
4236         int ret = 0;
4237         int i;
4238
4239         memset(data, 0, sizeof(*data));
4240
4241         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4242                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4243
4244                 if (!desc->count || !desc->duration)
4245                         continue;
4246
4247                 data->count[i] = desc->count;
4248                 data->desc[i].start = le32_to_cpu(desc->start_time);
4249                 data->desc[i].duration = le32_to_cpu(desc->duration);
4250                 data->desc[i].interval = le32_to_cpu(desc->interval);
4251
4252                 if (data->count[i] > 1 &&
4253                     data->desc[i].interval < data->desc[i].duration)
4254                         continue;
4255
4256                 ieee80211_extend_noa_desc(data, tsf, i);
4257                 ret++;
4258         }
4259
4260         if (ret)
4261                 ieee80211_update_p2p_noa(data, tsf);
4262
4263         return ret;
4264 }
4265 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4266
4267 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4268                            struct ieee80211_sub_if_data *sdata)
4269 {
4270         u64 tsf = drv_get_tsf(local, sdata);
4271         u64 dtim_count = 0;
4272         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4273         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4274         struct ps_data *ps;
4275         u8 bcns_from_dtim;
4276
4277         if (tsf == -1ULL || !beacon_int || !dtim_period)
4278                 return;
4279
4280         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4281             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4282                 if (!sdata->bss)
4283                         return;
4284
4285                 ps = &sdata->bss->ps;
4286         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4287                 ps = &sdata->u.mesh.ps;
4288         } else {
4289                 return;
4290         }
4291
4292         /*
4293          * actually finds last dtim_count, mac80211 will update in
4294          * __beacon_add_tim().
4295          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4296          */
4297         do_div(tsf, beacon_int);
4298         bcns_from_dtim = do_div(tsf, dtim_period);
4299         /* just had a DTIM */
4300         if (!bcns_from_dtim)
4301                 dtim_count = 0;
4302         else
4303                 dtim_count = dtim_period - bcns_from_dtim;
4304
4305         ps->dtim_count = dtim_count;
4306 }
4307
4308 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4309                                          struct ieee80211_chanctx *ctx)
4310 {
4311         struct ieee80211_sub_if_data *sdata;
4312         u8 radar_detect = 0;
4313
4314         lockdep_assert_held(&local->chanctx_mtx);
4315
4316         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4317                 return 0;
4318
4319         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4320                 if (sdata->reserved_radar_required)
4321                         radar_detect |= BIT(sdata->reserved_chandef.width);
4322
4323         /*
4324          * An in-place reservation context should not have any assigned vifs
4325          * until it replaces the other context.
4326          */
4327         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4328                 !list_empty(&ctx->assigned_vifs));
4329
4330         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4331                 if (sdata->radar_required)
4332                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4333
4334         return radar_detect;
4335 }
4336
4337 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4338                                  const struct cfg80211_chan_def *chandef,
4339                                  enum ieee80211_chanctx_mode chanmode,
4340                                  u8 radar_detect)
4341 {
4342         struct ieee80211_local *local = sdata->local;
4343         struct ieee80211_sub_if_data *sdata_iter;
4344         enum nl80211_iftype iftype = sdata->wdev.iftype;
4345         struct ieee80211_chanctx *ctx;
4346         int total = 1;
4347         struct iface_combination_params params = {
4348                 .radar_detect = radar_detect,
4349         };
4350
4351         lockdep_assert_held(&local->chanctx_mtx);
4352
4353         if (WARN_ON(hweight32(radar_detect) > 1))
4354                 return -EINVAL;
4355
4356         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4357                     !chandef->chan))
4358                 return -EINVAL;
4359
4360         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4361                 return -EINVAL;
4362
4363         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4364             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4365                 /*
4366                  * always passing this is harmless, since it'll be the
4367                  * same value that cfg80211 finds if it finds the same
4368                  * interface ... and that's always allowed
4369                  */
4370                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4371         }
4372
4373         /* Always allow software iftypes */
4374         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4375                 if (radar_detect)
4376                         return -EINVAL;
4377                 return 0;
4378         }
4379
4380         if (chandef)
4381                 params.num_different_channels = 1;
4382
4383         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4384                 params.iftype_num[iftype] = 1;
4385
4386         list_for_each_entry(ctx, &local->chanctx_list, list) {
4387                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4388                         continue;
4389                 params.radar_detect |=
4390                         ieee80211_chanctx_radar_detect(local, ctx);
4391                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4392                         params.num_different_channels++;
4393                         continue;
4394                 }
4395                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4396                     cfg80211_chandef_compatible(chandef,
4397                                                 &ctx->conf.def))
4398                         continue;
4399                 params.num_different_channels++;
4400         }
4401
4402         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4403                 struct wireless_dev *wdev_iter;
4404
4405                 wdev_iter = &sdata_iter->wdev;
4406
4407                 if (sdata_iter == sdata ||
4408                     !ieee80211_sdata_running(sdata_iter) ||
4409                     cfg80211_iftype_allowed(local->hw.wiphy,
4410                                             wdev_iter->iftype, 0, 1))
4411                         continue;
4412
4413                 params.iftype_num[wdev_iter->iftype]++;
4414                 total++;
4415         }
4416
4417         if (total == 1 && !params.radar_detect)
4418                 return 0;
4419
4420         return cfg80211_check_combinations(local->hw.wiphy, &params);
4421 }
4422
4423 static void
4424 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4425                          void *data)
4426 {
4427         u32 *max_num_different_channels = data;
4428
4429         *max_num_different_channels = max(*max_num_different_channels,
4430                                           c->num_different_channels);
4431 }
4432
4433 int ieee80211_max_num_channels(struct ieee80211_local *local)
4434 {
4435         struct ieee80211_sub_if_data *sdata;
4436         struct ieee80211_chanctx *ctx;
4437         u32 max_num_different_channels = 1;
4438         int err;
4439         struct iface_combination_params params = {0};
4440
4441         lockdep_assert_held(&local->chanctx_mtx);
4442
4443         list_for_each_entry(ctx, &local->chanctx_list, list) {
4444                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4445                         continue;
4446
4447                 params.num_different_channels++;
4448
4449                 params.radar_detect |=
4450                         ieee80211_chanctx_radar_detect(local, ctx);
4451         }
4452
4453         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4454                 params.iftype_num[sdata->wdev.iftype]++;
4455
4456         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4457                                          ieee80211_iter_max_chans,
4458                                          &max_num_different_channels);
4459         if (err < 0)
4460                 return err;
4461
4462         return max_num_different_channels;
4463 }
4464
4465 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4466                                 struct ieee80211_sta_s1g_cap *caps,
4467                                 struct sk_buff *skb)
4468 {
4469         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4470         struct ieee80211_s1g_cap s1g_capab;
4471         u8 *pos;
4472         int i;
4473
4474         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4475                 return;
4476
4477         if (!caps->s1g)
4478                 return;
4479
4480         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4481         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4482
4483         /* override the capability info */
4484         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4485                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4486
4487                 s1g_capab.capab_info[i] &= ~mask;
4488                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4489         }
4490
4491         /* then MCS and NSS set */
4492         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4493                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4494
4495                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4496                 s1g_capab.supp_mcs_nss[i] |=
4497                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4498         }
4499
4500         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4501         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4502         *pos++ = sizeof(s1g_capab);
4503
4504         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4505 }
4506
4507 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4508                                   struct sk_buff *skb)
4509 {
4510         u8 *pos = skb_put(skb, 3);
4511
4512         *pos++ = WLAN_EID_AID_REQUEST;
4513         *pos++ = 1;
4514         *pos++ = 0;
4515 }
4516
4517 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4518 {
4519         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4520         *buf++ = 7; /* len */
4521         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4522         *buf++ = 0x50;
4523         *buf++ = 0xf2;
4524         *buf++ = 2; /* WME */
4525         *buf++ = 0; /* WME info */
4526         *buf++ = 1; /* WME ver */
4527         *buf++ = qosinfo; /* U-APSD no in use */
4528
4529         return buf;
4530 }
4531
4532 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4533                              unsigned long *frame_cnt,
4534                              unsigned long *byte_cnt)
4535 {
4536         struct txq_info *txqi = to_txq_info(txq);
4537         u32 frag_cnt = 0, frag_bytes = 0;
4538         struct sk_buff *skb;
4539
4540         skb_queue_walk(&txqi->frags, skb) {
4541                 frag_cnt++;
4542                 frag_bytes += skb->len;
4543         }
4544
4545         if (frame_cnt)
4546                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4547
4548         if (byte_cnt)
4549                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4550 }
4551 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4552
4553 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4554         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4555         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4556         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4557         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4558 };
4559
4560 u16 ieee80211_encode_usf(int listen_interval)
4561 {
4562         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4563         u16 ui, usf = 0;
4564
4565         /* find greatest USF */
4566         while (usf < IEEE80211_MAX_USF) {
4567                 if (listen_interval % listen_int_usf[usf + 1])
4568                         break;
4569                 usf += 1;
4570         }
4571         ui = listen_interval / listen_int_usf[usf];
4572
4573         /* error if there is a remainder. Should've been checked by user */
4574         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4575         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4576                           FIELD_PREP(LISTEN_INT_UI, ui);
4577
4578         return (u16) listen_interval;
4579 }