net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2021 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  49                         enum nl80211_iftype type)
  50 {
  51         __le16 fc = hdr->frame_control;
  52
  53         if (ieee80211_is_data(fc)) {
  54                 if (len < 24) /* drop incorrect hdr len (data) */
  55                         return NULL;
  56
  57                 if (ieee80211_has_a4(fc))
  58                         return NULL;
  59                 if (ieee80211_has_tods(fc))
  60                         return hdr->addr1;
  61                 if (ieee80211_has_fromds(fc))
  62                         return hdr->addr2;
  63
  64                 return hdr->addr3;
  65         }
  66
  67         if (ieee80211_is_s1g_beacon(fc)) {
  68                 struct ieee80211_ext *ext = (void *) hdr;
  69
  70                 return ext->u.s1g_beacon.sa;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98 EXPORT_SYMBOL(ieee80211_get_bssid);
  99
 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 101 {
 102         struct sk_buff *skb;
 103         struct ieee80211_hdr *hdr;
 104
 105         skb_queue_walk(&tx->skbs, skb) {
 106                 hdr = (struct ieee80211_hdr *) skb->data;
 107                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 108         }
 109 }
 110
 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 112                              int rate, int erp, int short_preamble,
 113                              int shift)
 114 {
 115         int dur;
 116
 117         /* calculate duration (in microseconds, rounded up to next higher
 118          * integer if it includes a fractional microsecond) to send frame of
 119          * len bytes (does not include FCS) at the given rate. Duration will
 120          * also include SIFS.
 121          *
 122          * rate is in 100 kbps, so divident is multiplied by 10 in the
 123          * DIV_ROUND_UP() operations.
 124          *
 125          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 126          * is assumed to be 0 otherwise.
 127          */
 128
 129         if (band == NL80211_BAND_5GHZ || erp) {
 130                 /*
 131                  * OFDM:
 132                  *
 133                  * N_DBPS = DATARATE x 4
 134                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 135                  *      (16 = SIGNAL time, 6 = tail bits)
 136                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 137                  *
 138                  * T_SYM = 4 usec
 139                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 140                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 141                  *      signal ext = 6 usec
 142                  */
 143                 dur = 16; /* SIFS + signal ext */
 144                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 145                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 146
 147                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 148                  *  * times 4 for 5 MHz
 149                  *  * times 2 for 10 MHz
 150                  */
 151                 dur *= 1 << shift;
 152
 153                 /* rates should already consider the channel bandwidth,
 154                  * don't apply divisor again.
 155                  */
 156                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 157                                         4 * rate); /* T_SYM x N_SYM */
 158         } else {
 159                 /*
 160                  * 802.11b or 802.11g with 802.11b compatibility:
 161                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 162                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 163                  *
 164                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 165                  * aSIFSTime = 10 usec
 166                  * aPreambleLength = 144 usec or 72 usec with short preamble
 167                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 168                  */
 169                 dur = 10; /* aSIFSTime = 10 usec */
 170                 dur += short_preamble ? (72 + 24) : (144 + 48);
 171
 172                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 173         }
 174
 175         return dur;
 176 }
 177
 178 /* Exported duration function for driver use */
 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 180                                         struct ieee80211_vif *vif,
 181                                         enum nl80211_band band,
 182                                         size_t frame_len,
 183                                         struct ieee80211_rate *rate)
 184 {
 185         struct ieee80211_sub_if_data *sdata;
 186         u16 dur;
 187         int erp, shift = 0;
 188         bool short_preamble = false;
 189
 190         erp = 0;
 191         if (vif) {
 192                 sdata = vif_to_sdata(vif);
 193                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 194                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 195                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 196                 shift = ieee80211_vif_get_shift(vif);
 197         }
 198
 199         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 200                                        short_preamble, shift);
 201
 202         return cpu_to_le16(dur);
 203 }
 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 205
 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 207                               struct ieee80211_vif *vif, size_t frame_len,
 208                               const struct ieee80211_tx_info *frame_txctl)
 209 {
 210         struct ieee80211_local *local = hw_to_local(hw);
 211         struct ieee80211_rate *rate;
 212         struct ieee80211_sub_if_data *sdata;
 213         bool short_preamble;
 214         int erp, shift = 0, bitrate;
 215         u16 dur;
 216         struct ieee80211_supported_band *sband;
 217
 218         sband = local->hw.wiphy->bands[frame_txctl->band];
 219
 220         short_preamble = false;
 221
 222         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 223
 224         erp = 0;
 225         if (vif) {
 226                 sdata = vif_to_sdata(vif);
 227                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 228                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 229                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 230                 shift = ieee80211_vif_get_shift(vif);
 231         }
 232
 233         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 234
 235         /* CTS duration */
 236         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                        erp, short_preamble, shift);
 238         /* Data frame duration */
 239         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 240                                         erp, short_preamble, shift);
 241         /* ACK duration */
 242         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 243                                         erp, short_preamble, shift);
 244
 245         return cpu_to_le16(dur);
 246 }
 247 EXPORT_SYMBOL(ieee80211_rts_duration);
 248
 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 250                                     struct ieee80211_vif *vif,
 251                                     size_t frame_len,
 252                                     const struct ieee80211_tx_info *frame_txctl)
 253 {
 254         struct ieee80211_local *local = hw_to_local(hw);
 255         struct ieee80211_rate *rate;
 256         struct ieee80211_sub_if_data *sdata;
 257         bool short_preamble;
 258         int erp, shift = 0, bitrate;
 259         u16 dur;
 260         struct ieee80211_supported_band *sband;
 261
 262         sband = local->hw.wiphy->bands[frame_txctl->band];
 263
 264         short_preamble = false;
 265
 266         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 267         erp = 0;
 268         if (vif) {
 269                 sdata = vif_to_sdata(vif);
 270                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 271                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 272                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 273                 shift = ieee80211_vif_get_shift(vif);
 274         }
 275
 276         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 277
 278         /* Data frame duration */
 279         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 280                                        erp, short_preamble, shift);
 281         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 /* ACK duration */
 283                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 284                                                 erp, short_preamble, shift);
 285         }
 286
 287         return cpu_to_le16(dur);
 288 }
 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 290
 291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 292 {
 293         struct ieee80211_local *local = sdata->local;
 294         struct ieee80211_vif *vif = &sdata->vif;
 295         struct fq *fq = &local->fq;
 296         struct ps_data *ps = NULL;
 297         struct txq_info *txqi;
 298         struct sta_info *sta;
 299         int i;
 300
 301         local_bh_disable();
 302         spin_lock(&fq->lock);
 303
 304         if (sdata->vif.type == NL80211_IFTYPE_AP)
 305                 ps = &sdata->bss->ps;
 306
 307         sdata->vif.txqs_stopped[ac] = false;
 308
 309         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 310                 if (sdata != sta->sdata)
 311                         continue;
 312
 313                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 314                         struct ieee80211_txq *txq = sta->sta.txq[i];
 315
 316                         if (!txq)
 317                                 continue;
 318
 319                         txqi = to_txq_info(txq);
 320
 321                         if (ac != txq->ac)
 322                                 continue;
 323
 324                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 325                                                 &txqi->flags))
 326                                 continue;
 327
 328                         spin_unlock(&fq->lock);
 329                         drv_wake_tx_queue(local, txqi);
 330                         spin_lock(&fq->lock);
 331                 }
 332         }
 333
 334         if (!vif->txq)
 335                 goto out;
 336
 337         txqi = to_txq_info(vif->txq);
 338
 339         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 340             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 341                 goto out;
 342
 343         spin_unlock(&fq->lock);
 344
 345         drv_wake_tx_queue(local, txqi);
 346         local_bh_enable();
 347         return;
 348 out:
 349         spin_unlock(&fq->lock);
 350         local_bh_enable();
 351 }
 352
 353 static void
 354 __releases(&local->queue_stop_reason_lock)
 355 __acquires(&local->queue_stop_reason_lock)
 356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 357 {
 358         struct ieee80211_sub_if_data *sdata;
 359         int n_acs = IEEE80211_NUM_ACS;
 360         int i;
 361
 362         rcu_read_lock();
 363
 364         if (local->hw.queues < IEEE80211_NUM_ACS)
 365                 n_acs = 1;
 366
 367         for (i = 0; i < local->hw.queues; i++) {
 368                 if (local->queue_stop_reasons[i])
 369                         continue;
 370
 371                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 372                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 373                         int ac;
 374
 375                         for (ac = 0; ac < n_acs; ac++) {
 376                                 int ac_queue = sdata->vif.hw_queue[ac];
 377
 378                                 if (ac_queue == i ||
 379                                     sdata->vif.cab_queue == i)
 380                                         __ieee80211_wake_txqs(sdata, ac);
 381                         }
 382                 }
 383                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 384         }
 385
 386         rcu_read_unlock();
 387 }
 388
 389 void ieee80211_wake_txqs(struct tasklet_struct *t)
 390 {
 391         struct ieee80211_local *local = from_tasklet(local, t,
 392                                                      wake_txqs_tasklet);
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 396         _ieee80211_wake_txqs(local, &flags);
 397         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 398 }
 399
 400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 401 {
 402         struct ieee80211_sub_if_data *sdata;
 403         int n_acs = IEEE80211_NUM_ACS;
 404
 405         if (local->ops->wake_tx_queue)
 406                 return;
 407
 408         if (local->hw.queues < IEEE80211_NUM_ACS)
 409                 n_acs = 1;
 410
 411         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 412                 int ac;
 413
 414                 if (!sdata->dev)
 415                         continue;
 416
 417                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 418                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 419                         continue;
 420
 421                 for (ac = 0; ac < n_acs; ac++) {
 422                         int ac_queue = sdata->vif.hw_queue[ac];
 423
 424                         if (ac_queue == queue ||
 425                             (sdata->vif.cab_queue == queue &&
 426                              local->queue_stop_reasons[ac_queue] == 0 &&
 427                              skb_queue_empty(&local->pending[ac_queue])))
 428                                 netif_wake_subqueue(sdata->dev, ac);
 429                 }
 430         }
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         trace_wake_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 446                 return;
 447
 448         if (!refcounted) {
 449                 local->q_stop_reasons[queue][reason] = 0;
 450         } else {
 451                 local->q_stop_reasons[queue][reason]--;
 452                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 453                         local->q_stop_reasons[queue][reason] = 0;
 454         }
 455
 456         if (local->q_stop_reasons[queue][reason] == 0)
 457                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 458
 459         if (local->queue_stop_reasons[queue] != 0)
 460                 /* someone still has this queue stopped */
 461                 return;
 462
 463         if (skb_queue_empty(&local->pending[queue])) {
 464                 rcu_read_lock();
 465                 ieee80211_propagate_queue_wake(local, queue);
 466                 rcu_read_unlock();
 467         } else
 468                 tasklet_schedule(&local->tx_pending_tasklet);
 469
 470         /*
 471          * Calling _ieee80211_wake_txqs here can be a problem because it may
 472          * release queue_stop_reason_lock which has been taken by
 473          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 474          * release someone's lock, but it is fine because all the callers of
 475          * __ieee80211_wake_queue call it right before releasing the lock.
 476          */
 477         if (local->ops->wake_tx_queue) {
 478                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 479                         tasklet_schedule(&local->wake_txqs_tasklet);
 480                 else
 481                         _ieee80211_wake_txqs(local, flags);
 482         }
 483 }
 484
 485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 486                                     enum queue_stop_reason reason,
 487                                     bool refcounted)
 488 {
 489         struct ieee80211_local *local = hw_to_local(hw);
 490         unsigned long flags;
 491
 492         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 493         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 494         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 495 }
 496
 497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 498 {
 499         ieee80211_wake_queue_by_reason(hw, queue,
 500                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 501                                        false);
 502 }
 503 EXPORT_SYMBOL(ieee80211_wake_queue);
 504
 505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 506                                    enum queue_stop_reason reason,
 507                                    bool refcounted)
 508 {
 509         struct ieee80211_local *local = hw_to_local(hw);
 510         struct ieee80211_sub_if_data *sdata;
 511         int n_acs = IEEE80211_NUM_ACS;
 512
 513         trace_stop_queue(local, queue, reason);
 514
 515         if (WARN_ON(queue >= hw->queues))
 516                 return;
 517
 518         if (!refcounted)
 519                 local->q_stop_reasons[queue][reason] = 1;
 520         else
 521                 local->q_stop_reasons[queue][reason]++;
 522
 523         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 524                 return;
 525
 526         if (local->hw.queues < IEEE80211_NUM_ACS)
 527                 n_acs = 1;
 528
 529         rcu_read_lock();
 530         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 531                 int ac;
 532
 533                 if (!sdata->dev)
 534                         continue;
 535
 536                 for (ac = 0; ac < n_acs; ac++) {
 537                         if (sdata->vif.hw_queue[ac] == queue ||
 538                             sdata->vif.cab_queue == queue) {
 539                                 if (!local->ops->wake_tx_queue) {
 540                                         netif_stop_subqueue(sdata->dev, ac);
 541                                         continue;
 542                                 }
 543                                 spin_lock(&local->fq.lock);
 544                                 sdata->vif.txqs_stopped[ac] = true;
 545                                 spin_unlock(&local->fq.lock);
 546                         }
 547                 }
 548         }
 549         rcu_read_unlock();
 550 }
 551
 552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 553                                     enum queue_stop_reason reason,
 554                                     bool refcounted)
 555 {
 556         struct ieee80211_local *local = hw_to_local(hw);
 557         unsigned long flags;
 558
 559         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 560         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 561         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 562 }
 563
 564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 565 {
 566         ieee80211_stop_queue_by_reason(hw, queue,
 567                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 568                                        false);
 569 }
 570 EXPORT_SYMBOL(ieee80211_stop_queue);
 571
 572 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 573                                struct sk_buff *skb)
 574 {
 575         struct ieee80211_hw *hw = &local->hw;
 576         unsigned long flags;
 577         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 578         int queue = info->hw_queue;
 579
 580         if (WARN_ON(!info->control.vif)) {
 581                 ieee80211_free_txskb(&local->hw, skb);
 582                 return;
 583         }
 584
 585         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 586         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 587                                false);
 588         __skb_queue_tail(&local->pending[queue], skb);
 589         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 590                                false, &flags);
 591         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 592 }
 593
 594 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 595                                 struct sk_buff_head *skbs)
 596 {
 597         struct ieee80211_hw *hw = &local->hw;
 598         struct sk_buff *skb;
 599         unsigned long flags;
 600         int queue, i;
 601
 602         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 603         while ((skb = skb_dequeue(skbs))) {
 604                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 605
 606                 if (WARN_ON(!info->control.vif)) {
 607                         ieee80211_free_txskb(&local->hw, skb);
 608                         continue;
 609                 }
 610
 611                 queue = info->hw_queue;
 612
 613                 __ieee80211_stop_queue(hw, queue,
 614                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 615                                 false);
 616
 617                 __skb_queue_tail(&local->pending[queue], skb);
 618         }
 619
 620         for (i = 0; i < hw->queues; i++)
 621                 __ieee80211_wake_queue(hw, i,
 622                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 623                         false, &flags);
 624         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 625 }
 626
 627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 628                                      unsigned long queues,
 629                                      enum queue_stop_reason reason,
 630                                      bool refcounted)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633         unsigned long flags;
 634         int i;
 635
 636         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 637
 638         for_each_set_bit(i, &queues, hw->queues)
 639                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 640
 641         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 642 }
 643
 644 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 645 {
 646         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 647                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 648                                         false);
 649 }
 650 EXPORT_SYMBOL(ieee80211_stop_queues);
 651
 652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 653 {
 654         struct ieee80211_local *local = hw_to_local(hw);
 655         unsigned long flags;
 656         int ret;
 657
 658         if (WARN_ON(queue >= hw->queues))
 659                 return true;
 660
 661         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 662         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 663                        &local->queue_stop_reasons[queue]);
 664         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 665         return ret;
 666 }
 667 EXPORT_SYMBOL(ieee80211_queue_stopped);
 668
 669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 670                                      unsigned long queues,
 671                                      enum queue_stop_reason reason,
 672                                      bool refcounted)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675         unsigned long flags;
 676         int i;
 677
 678         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 679
 680         for_each_set_bit(i, &queues, hw->queues)
 681                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 682
 683         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 684 }
 685
 686 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 687 {
 688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 689                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 690                                         false);
 691 }
 692 EXPORT_SYMBOL(ieee80211_wake_queues);
 693
 694 static unsigned int
 695 ieee80211_get_vif_queues(struct ieee80211_local *local,
 696                          struct ieee80211_sub_if_data *sdata)
 697 {
 698         unsigned int queues;
 699
 700         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 701                 int ac;
 702
 703                 queues = 0;
 704
 705                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 706                         queues |= BIT(sdata->vif.hw_queue[ac]);
 707                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 708                         queues |= BIT(sdata->vif.cab_queue);
 709         } else {
 710                 /* all queues */
 711                 queues = BIT(local->hw.queues) - 1;
 712         }
 713
 714         return queues;
 715 }
 716
 717 void __ieee80211_flush_queues(struct ieee80211_local *local,
 718                               struct ieee80211_sub_if_data *sdata,
 719                               unsigned int queues, bool drop)
 720 {
 721         if (!local->ops->flush)
 722                 return;
 723
 724         /*
 725          * If no queue was set, or if the HW doesn't support
 726          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 727          */
 728         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 729                 queues = ieee80211_get_vif_queues(local, sdata);
 730
 731         ieee80211_stop_queues_by_reason(&local->hw, queues,
 732                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 733                                         false);
 734
 735         drv_flush(local, sdata, queues, drop);
 736
 737         ieee80211_wake_queues_by_reason(&local->hw, queues,
 738                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 739                                         false);
 740 }
 741
 742 void ieee80211_flush_queues(struct ieee80211_local *local,
 743                             struct ieee80211_sub_if_data *sdata, bool drop)
 744 {
 745         __ieee80211_flush_queues(local, sdata, 0, drop);
 746 }
 747
 748 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 749                                struct ieee80211_sub_if_data *sdata,
 750                                enum queue_stop_reason reason)
 751 {
 752         ieee80211_stop_queues_by_reason(&local->hw,
 753                                         ieee80211_get_vif_queues(local, sdata),
 754                                         reason, true);
 755 }
 756
 757 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 758                                struct ieee80211_sub_if_data *sdata,
 759                                enum queue_stop_reason reason)
 760 {
 761         ieee80211_wake_queues_by_reason(&local->hw,
 762                                         ieee80211_get_vif_queues(local, sdata),
 763                                         reason, true);
 764 }
 765
 766 static void __iterate_interfaces(struct ieee80211_local *local,
 767                                  u32 iter_flags,
 768                                  void (*iterator)(void *data, u8 *mac,
 769                                                   struct ieee80211_vif *vif),
 770                                  void *data)
 771 {
 772         struct ieee80211_sub_if_data *sdata;
 773         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 774
 775         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 776                 switch (sdata->vif.type) {
 777                 case NL80211_IFTYPE_MONITOR:
 778                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 779                                 continue;
 780                         break;
 781                 case NL80211_IFTYPE_AP_VLAN:
 782                         continue;
 783                 default:
 784                         break;
 785                 }
 786                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 787                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 788                         continue;
 789                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 790                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 791                         continue;
 792                 if (ieee80211_sdata_running(sdata) || !active_only)
 793                         iterator(data, sdata->vif.addr,
 794                                  &sdata->vif);
 795         }
 796
 797         sdata = rcu_dereference_check(local->monitor_sdata,
 798                                       lockdep_is_held(&local->iflist_mtx) ||
 799                                       lockdep_is_held(&local->hw.wiphy->mtx));
 800         if (sdata &&
 801             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 802              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 803                 iterator(data, sdata->vif.addr, &sdata->vif);
 804 }
 805
 806 void ieee80211_iterate_interfaces(
 807         struct ieee80211_hw *hw, u32 iter_flags,
 808         void (*iterator)(void *data, u8 *mac,
 809                          struct ieee80211_vif *vif),
 810         void *data)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813
 814         mutex_lock(&local->iflist_mtx);
 815         __iterate_interfaces(local, iter_flags, iterator, data);
 816         mutex_unlock(&local->iflist_mtx);
 817 }
 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 819
 820 void ieee80211_iterate_active_interfaces_atomic(
 821         struct ieee80211_hw *hw, u32 iter_flags,
 822         void (*iterator)(void *data, u8 *mac,
 823                          struct ieee80211_vif *vif),
 824         void *data)
 825 {
 826         struct ieee80211_local *local = hw_to_local(hw);
 827
 828         rcu_read_lock();
 829         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 830                              iterator, data);
 831         rcu_read_unlock();
 832 }
 833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 834
 835 void ieee80211_iterate_active_interfaces_mtx(
 836         struct ieee80211_hw *hw, u32 iter_flags,
 837         void (*iterator)(void *data, u8 *mac,
 838                          struct ieee80211_vif *vif),
 839         void *data)
 840 {
 841         struct ieee80211_local *local = hw_to_local(hw);
 842
 843         lockdep_assert_wiphy(hw->wiphy);
 844
 845         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 846                              iterator, data);
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 849
 850 static void __iterate_stations(struct ieee80211_local *local,
 851                                void (*iterator)(void *data,
 852                                                 struct ieee80211_sta *sta),
 853                                void *data)
 854 {
 855         struct sta_info *sta;
 856
 857         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 858                 if (!sta->uploaded)
 859                         continue;
 860
 861                 iterator(data, &sta->sta);
 862         }
 863 }
 864
 865 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 866                         void (*iterator)(void *data,
 867                                          struct ieee80211_sta *sta),
 868                         void *data)
 869 {
 870         struct ieee80211_local *local = hw_to_local(hw);
 871
 872         rcu_read_lock();
 873         __iterate_stations(local, iterator, data);
 874         rcu_read_unlock();
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 877
 878 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 879 {
 880         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 881
 882         if (!ieee80211_sdata_running(sdata) ||
 883             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 884                 return NULL;
 885         return &sdata->vif;
 886 }
 887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 888
 889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 890 {
 891         if (!vif)
 892                 return NULL;
 893
 894         return &vif_to_sdata(vif)->wdev;
 895 }
 896 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 897
 898 /*
 899  * Nothing should have been stuffed into the workqueue during
 900  * the suspend->resume cycle. Since we can't check each caller
 901  * of this function if we are already quiescing / suspended,
 902  * check here and don't WARN since this can actually happen when
 903  * the rx path (for example) is racing against __ieee80211_suspend
 904  * and suspending / quiescing was set after the rx path checked
 905  * them.
 906  */
 907 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 908 {
 909         if (local->quiescing || (local->suspended && !local->resuming)) {
 910                 pr_warn("queueing ieee80211 work while going to suspend\n");
 911                 return false;
 912         }
 913
 914         return true;
 915 }
 916
 917 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 918 {
 919         struct ieee80211_local *local = hw_to_local(hw);
 920
 921         if (!ieee80211_can_queue_work(local))
 922                 return;
 923
 924         queue_work(local->workqueue, work);
 925 }
 926 EXPORT_SYMBOL(ieee80211_queue_work);
 927
 928 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 929                                   struct delayed_work *dwork,
 930                                   unsigned long delay)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_delayed_work(local->workqueue, dwork, delay);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 940
 941 static void ieee80211_parse_extension_element(u32 *crc,
 942                                               const struct element *elem,
 943                                               struct ieee802_11_elems *elems)
 944 {
 945         const void *data = elem->data + 1;
 946         u8 len = elem->datalen - 1;
 947
 948         switch (elem->data[0]) {
 949         case WLAN_EID_EXT_HE_MU_EDCA:
 950                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 951                         elems->mu_edca_param_set = data;
 952                         if (crc)
 953                                 *crc = crc32_be(*crc, (void *)elem,
 954                                                 elem->datalen + 2);
 955                 }
 956                 break;
 957         case WLAN_EID_EXT_HE_CAPABILITY:
 958                 elems->he_cap = data;
 959                 elems->he_cap_len = len;
 960                 break;
 961         case WLAN_EID_EXT_HE_OPERATION:
 962                 if (len >= sizeof(*elems->he_operation) &&
 963                     len >= ieee80211_he_oper_size(data) - 1) {
 964                         if (crc)
 965                                 *crc = crc32_be(*crc, (void *)elem,
 966                                                 elem->datalen + 2);
 967                         elems->he_operation = data;
 968                 }
 969                 break;
 970         case WLAN_EID_EXT_UORA:
 971                 if (len >= 1)
 972                         elems->uora_element = data;
 973                 break;
 974         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 975                 if (len == 3)
 976                         elems->max_channel_switch_time = data;
 977                 break;
 978         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 979                 if (len >= sizeof(*elems->mbssid_config_ie))
 980                         elems->mbssid_config_ie = data;
 981                 break;
 982         case WLAN_EID_EXT_HE_SPR:
 983                 if (len >= sizeof(*elems->he_spr) &&
 984                     len >= ieee80211_he_spr_size(data))
 985                         elems->he_spr = data;
 986                 break;
 987         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 988                 if (len >= sizeof(*elems->he_6ghz_capa))
 989                         elems->he_6ghz_capa = data;
 990                 break;
 991         }
 992 }
 993
 994 static u32
 995 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 996                             struct ieee802_11_elems *elems,
 997                             u64 filter, u32 crc,
 998                             const struct element *check_inherit)
 999 {
1000         const struct element *elem;
1001         bool calc_crc = filter != 0;
1002         DECLARE_BITMAP(seen_elems, 256);
1003         const u8 *ie;
1004
1005         bitmap_zero(seen_elems, 256);
1006
1007         for_each_element(elem, start, len) {
1008                 bool elem_parse_failed;
1009                 u8 id = elem->id;
1010                 u8 elen = elem->datalen;
1011                 const u8 *pos = elem->data;
1012
1013                 if (check_inherit &&
1014                     !cfg80211_is_element_inherited(elem,
1015                                                    check_inherit))
1016                         continue;
1017
1018                 switch (id) {
1019                 case WLAN_EID_SSID:
1020                 case WLAN_EID_SUPP_RATES:
1021                 case WLAN_EID_FH_PARAMS:
1022                 case WLAN_EID_DS_PARAMS:
1023                 case WLAN_EID_CF_PARAMS:
1024                 case WLAN_EID_TIM:
1025                 case WLAN_EID_IBSS_PARAMS:
1026                 case WLAN_EID_CHALLENGE:
1027                 case WLAN_EID_RSN:
1028                 case WLAN_EID_ERP_INFO:
1029                 case WLAN_EID_EXT_SUPP_RATES:
1030                 case WLAN_EID_HT_CAPABILITY:
1031                 case WLAN_EID_HT_OPERATION:
1032                 case WLAN_EID_VHT_CAPABILITY:
1033                 case WLAN_EID_VHT_OPERATION:
1034                 case WLAN_EID_MESH_ID:
1035                 case WLAN_EID_MESH_CONFIG:
1036                 case WLAN_EID_PEER_MGMT:
1037                 case WLAN_EID_PREQ:
1038                 case WLAN_EID_PREP:
1039                 case WLAN_EID_PERR:
1040                 case WLAN_EID_RANN:
1041                 case WLAN_EID_CHANNEL_SWITCH:
1042                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1043                 case WLAN_EID_COUNTRY:
1044                 case WLAN_EID_PWR_CONSTRAINT:
1045                 case WLAN_EID_TIMEOUT_INTERVAL:
1046                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1048                 case WLAN_EID_CHAN_SWITCH_PARAM:
1049                 case WLAN_EID_EXT_CAPABILITY:
1050                 case WLAN_EID_CHAN_SWITCH_TIMING:
1051                 case WLAN_EID_LINK_ID:
1052                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1053                 case WLAN_EID_RSNX:
1054                 case WLAN_EID_S1G_BCN_COMPAT:
1055                 case WLAN_EID_S1G_CAPABILITIES:
1056                 case WLAN_EID_S1G_OPERATION:
1057                 case WLAN_EID_AID_RESPONSE:
1058                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1059                 /*
1060                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1061                  * that if the content gets bigger it might be needed more than once
1062                  */
1063                         if (test_bit(id, seen_elems)) {
1064                                 elems->parse_error = true;
1065                                 continue;
1066                         }
1067                         break;
1068                 }
1069
1070                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1071                         crc = crc32_be(crc, pos - 2, elen + 2);
1072
1073                 elem_parse_failed = false;
1074
1075                 switch (id) {
1076                 case WLAN_EID_LINK_ID:
1077                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1078                                 elem_parse_failed = true;
1079                                 break;
1080                         }
1081                         elems->lnk_id = (void *)(pos - 2);
1082                         break;
1083                 case WLAN_EID_CHAN_SWITCH_TIMING:
1084                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1085                                 elem_parse_failed = true;
1086                                 break;
1087                         }
1088                         elems->ch_sw_timing = (void *)pos;
1089                         break;
1090                 case WLAN_EID_EXT_CAPABILITY:
1091                         elems->ext_capab = pos;
1092                         elems->ext_capab_len = elen;
1093                         break;
1094                 case WLAN_EID_SSID:
1095                         elems->ssid = pos;
1096                         elems->ssid_len = elen;
1097                         break;
1098                 case WLAN_EID_SUPP_RATES:
1099                         elems->supp_rates = pos;
1100                         elems->supp_rates_len = elen;
1101                         break;
1102                 case WLAN_EID_DS_PARAMS:
1103                         if (elen >= 1)
1104                                 elems->ds_params = pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 case WLAN_EID_TIM:
1109                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1110                                 elems->tim = (void *)pos;
1111                                 elems->tim_len = elen;
1112                         } else
1113                                 elem_parse_failed = true;
1114                         break;
1115                 case WLAN_EID_VENDOR_SPECIFIC:
1116                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1117                             pos[2] == 0xf2) {
1118                                 /* Microsoft OUI (00:50:F2) */
1119
1120                                 if (calc_crc)
1121                                         crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123                                 if (elen >= 5 && pos[3] == 2) {
1124                                         /* OUI Type 2 - WMM IE */
1125                                         if (pos[4] == 0) {
1126                                                 elems->wmm_info = pos;
1127                                                 elems->wmm_info_len = elen;
1128                                         } else if (pos[4] == 1) {
1129                                                 elems->wmm_param = pos;
1130                                                 elems->wmm_param_len = elen;
1131                                         }
1132                                 }
1133                         }
1134                         break;
1135                 case WLAN_EID_RSN:
1136                         elems->rsn = pos;
1137                         elems->rsn_len = elen;
1138                         break;
1139                 case WLAN_EID_ERP_INFO:
1140                         if (elen >= 1)
1141                                 elems->erp_info = pos;
1142                         else
1143                                 elem_parse_failed = true;
1144                         break;
1145                 case WLAN_EID_EXT_SUPP_RATES:
1146                         elems->ext_supp_rates = pos;
1147                         elems->ext_supp_rates_len = elen;
1148                         break;
1149                 case WLAN_EID_HT_CAPABILITY:
1150                         if (elen >= sizeof(struct ieee80211_ht_cap))
1151                                 elems->ht_cap_elem = (void *)pos;
1152                         else
1153                                 elem_parse_failed = true;
1154                         break;
1155                 case WLAN_EID_HT_OPERATION:
1156                         if (elen >= sizeof(struct ieee80211_ht_operation))
1157                                 elems->ht_operation = (void *)pos;
1158                         else
1159                                 elem_parse_failed = true;
1160                         break;
1161                 case WLAN_EID_VHT_CAPABILITY:
1162                         if (elen >= sizeof(struct ieee80211_vht_cap))
1163                                 elems->vht_cap_elem = (void *)pos;
1164                         else
1165                                 elem_parse_failed = true;
1166                         break;
1167                 case WLAN_EID_VHT_OPERATION:
1168                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1169                                 elems->vht_operation = (void *)pos;
1170                                 if (calc_crc)
1171                                         crc = crc32_be(crc, pos - 2, elen + 2);
1172                                 break;
1173                         }
1174                         elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_OPMODE_NOTIF:
1177                         if (elen > 0) {
1178                                 elems->opmode_notif = pos;
1179                                 if (calc_crc)
1180                                         crc = crc32_be(crc, pos - 2, elen + 2);
1181                                 break;
1182                         }
1183                         elem_parse_failed = true;
1184                         break;
1185                 case WLAN_EID_MESH_ID:
1186                         elems->mesh_id = pos;
1187                         elems->mesh_id_len = elen;
1188                         break;
1189                 case WLAN_EID_MESH_CONFIG:
1190                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1191                                 elems->mesh_config = (void *)pos;
1192                         else
1193                                 elem_parse_failed = true;
1194                         break;
1195                 case WLAN_EID_PEER_MGMT:
1196                         elems->peering = pos;
1197                         elems->peering_len = elen;
1198                         break;
1199                 case WLAN_EID_MESH_AWAKE_WINDOW:
1200                         if (elen >= 2)
1201                                 elems->awake_window = (void *)pos;
1202                         break;
1203                 case WLAN_EID_PREQ:
1204                         elems->preq = pos;
1205                         elems->preq_len = elen;
1206                         break;
1207                 case WLAN_EID_PREP:
1208                         elems->prep = pos;
1209                         elems->prep_len = elen;
1210                         break;
1211                 case WLAN_EID_PERR:
1212                         elems->perr = pos;
1213                         elems->perr_len = elen;
1214                         break;
1215                 case WLAN_EID_RANN:
1216                         if (elen >= sizeof(struct ieee80211_rann_ie))
1217                                 elems->rann = (void *)pos;
1218                         else
1219                                 elem_parse_failed = true;
1220                         break;
1221                 case WLAN_EID_CHANNEL_SWITCH:
1222                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1223                                 elem_parse_failed = true;
1224                                 break;
1225                         }
1226                         elems->ch_switch_ie = (void *)pos;
1227                         break;
1228                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1229                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1230                                 elem_parse_failed = true;
1231                                 break;
1232                         }
1233                         elems->ext_chansw_ie = (void *)pos;
1234                         break;
1235                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1236                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1237                                 elem_parse_failed = true;
1238                                 break;
1239                         }
1240                         elems->sec_chan_offs = (void *)pos;
1241                         break;
1242                 case WLAN_EID_CHAN_SWITCH_PARAM:
1243                         if (elen <
1244                             sizeof(*elems->mesh_chansw_params_ie)) {
1245                                 elem_parse_failed = true;
1246                                 break;
1247                         }
1248                         elems->mesh_chansw_params_ie = (void *)pos;
1249                         break;
1250                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1251                         if (!action ||
1252                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1253                                 elem_parse_failed = true;
1254                                 break;
1255                         }
1256                         elems->wide_bw_chansw_ie = (void *)pos;
1257                         break;
1258                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1259                         if (action) {
1260                                 elem_parse_failed = true;
1261                                 break;
1262                         }
1263                         /*
1264                          * This is a bit tricky, but as we only care about
1265                          * the wide bandwidth channel switch element, so
1266                          * just parse it out manually.
1267                          */
1268                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1269                                               pos, elen);
1270                         if (ie) {
1271                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1272                                         elems->wide_bw_chansw_ie =
1273                                                 (void *)(ie + 2);
1274                                 else
1275                                         elem_parse_failed = true;
1276                         }
1277                         break;
1278                 case WLAN_EID_COUNTRY:
1279                         elems->country_elem = pos;
1280                         elems->country_elem_len = elen;
1281                         break;
1282                 case WLAN_EID_PWR_CONSTRAINT:
1283                         if (elen != 1) {
1284                                 elem_parse_failed = true;
1285                                 break;
1286                         }
1287                         elems->pwr_constr_elem = pos;
1288                         break;
1289                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1290                         /* Lots of different options exist, but we only care
1291                          * about the Dynamic Transmit Power Control element.
1292                          * First check for the Cisco OUI, then for the DTPC
1293                          * tag (0x00).
1294                          */
1295                         if (elen < 4) {
1296                                 elem_parse_failed = true;
1297                                 break;
1298                         }
1299
1300                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1301                             pos[2] != 0x96 || pos[3] != 0x00)
1302                                 break;
1303
1304                         if (elen != 6) {
1305                                 elem_parse_failed = true;
1306                                 break;
1307                         }
1308
1309                         if (calc_crc)
1310                                 crc = crc32_be(crc, pos - 2, elen + 2);
1311
1312                         elems->cisco_dtpc_elem = pos;
1313                         break;
1314                 case WLAN_EID_ADDBA_EXT:
1315                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1316                                 elem_parse_failed = true;
1317                                 break;
1318                         }
1319                         elems->addba_ext_ie = (void *)pos;
1320                         break;
1321                 case WLAN_EID_TIMEOUT_INTERVAL:
1322                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1323                                 elems->timeout_int = (void *)pos;
1324                         else
1325                                 elem_parse_failed = true;
1326                         break;
1327                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1328                         if (elen >= sizeof(*elems->max_idle_period_ie))
1329                                 elems->max_idle_period_ie = (void *)pos;
1330                         break;
1331                 case WLAN_EID_RSNX:
1332                         elems->rsnx = pos;
1333                         elems->rsnx_len = elen;
1334                         break;
1335                 case WLAN_EID_TX_POWER_ENVELOPE:
1336                         if (elen < 1 ||
1337                             elen > sizeof(struct ieee80211_tx_pwr_env))
1338                                 break;
1339
1340                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1341                                 break;
1342
1343                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1344                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1345                         elems->tx_pwr_env_num++;
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                                             const u8 *transmitter_bssid,
1395                                             const 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 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
1461                                                     bool action, u64 filter,
1462                                                     u32 crc,
1463                                                     const u8 *transmitter_bssid,
1464                                                     const u8 *bss_bssid)
1465 {
1466         struct ieee802_11_elems *elems;
1467         const struct element *non_inherit = NULL;
1468         u8 *nontransmitted_profile;
1469         int nontransmitted_profile_len = 0;
1470
1471         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1472         if (!elems)
1473                 return NULL;
1474         elems->ie_start = start;
1475         elems->total_len = len;
1476
1477         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1478         if (nontransmitted_profile) {
1479                 nontransmitted_profile_len =
1480                         ieee802_11_find_bssid_profile(start, len, elems,
1481                                                       transmitter_bssid,
1482                                                       bss_bssid,
1483                                                       nontransmitted_profile);
1484                 non_inherit =
1485                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1486                                                nontransmitted_profile,
1487                                                nontransmitted_profile_len);
1488         }
1489
1490         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1491                                           crc, non_inherit);
1492
1493         /* Override with nontransmitted profile, if found */
1494         if (nontransmitted_profile_len)
1495                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1496                                             nontransmitted_profile_len,
1497                                             action, elems, 0, 0, NULL);
1498
1499         if (elems->tim && !elems->parse_error) {
1500                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1501
1502                 elems->dtim_period = tim_ie->dtim_period;
1503                 elems->dtim_count = tim_ie->dtim_count;
1504         }
1505
1506         /* Override DTIM period and count if needed */
1507         if (elems->bssid_index &&
1508             elems->bssid_index_len >=
1509             offsetofend(struct ieee80211_bssid_index, dtim_period))
1510                 elems->dtim_period = elems->bssid_index->dtim_period;
1511
1512         if (elems->bssid_index &&
1513             elems->bssid_index_len >=
1514             offsetofend(struct ieee80211_bssid_index, dtim_count))
1515                 elems->dtim_count = elems->bssid_index->dtim_count;
1516
1517         kfree(nontransmitted_profile);
1518
1519         elems->crc = crc;
1520
1521         return elems;
1522 }
1523
1524 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1525                                            struct ieee80211_tx_queue_params
1526                                            *qparam, int ac)
1527 {
1528         struct ieee80211_chanctx_conf *chanctx_conf;
1529         const struct ieee80211_reg_rule *rrule;
1530         const struct ieee80211_wmm_ac *wmm_ac;
1531         u16 center_freq = 0;
1532
1533         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1534             sdata->vif.type != NL80211_IFTYPE_STATION)
1535                 return;
1536
1537         rcu_read_lock();
1538         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1539         if (chanctx_conf)
1540                 center_freq = chanctx_conf->def.chan->center_freq;
1541
1542         if (!center_freq) {
1543                 rcu_read_unlock();
1544                 return;
1545         }
1546
1547         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1548
1549         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1550                 rcu_read_unlock();
1551                 return;
1552         }
1553
1554         if (sdata->vif.type == NL80211_IFTYPE_AP)
1555                 wmm_ac = &rrule->wmm_rule.ap[ac];
1556         else
1557                 wmm_ac = &rrule->wmm_rule.client[ac];
1558         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1559         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1560         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1561         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1562         rcu_read_unlock();
1563 }
1564
1565 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1566                                bool bss_notify, bool enable_qos)
1567 {
1568         struct ieee80211_local *local = sdata->local;
1569         struct ieee80211_tx_queue_params qparam;
1570         struct ieee80211_chanctx_conf *chanctx_conf;
1571         int ac;
1572         bool use_11b;
1573         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1574         int aCWmin, aCWmax;
1575
1576         if (!local->ops->conf_tx)
1577                 return;
1578
1579         if (local->hw.queues < IEEE80211_NUM_ACS)
1580                 return;
1581
1582         memset(&qparam, 0, sizeof(qparam));
1583
1584         rcu_read_lock();
1585         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1586         use_11b = (chanctx_conf &&
1587                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1588                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1589         rcu_read_unlock();
1590
1591         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1592
1593         /* Set defaults according to 802.11-2007 Table 7-37 */
1594         aCWmax = 1023;
1595         if (use_11b)
1596                 aCWmin = 31;
1597         else
1598                 aCWmin = 15;
1599
1600         /* Confiure old 802.11b/g medium access rules. */
1601         qparam.cw_max = aCWmax;
1602         qparam.cw_min = aCWmin;
1603         qparam.txop = 0;
1604         qparam.aifs = 2;
1605
1606         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1607                 /* Update if QoS is enabled. */
1608                 if (enable_qos) {
1609                         switch (ac) {
1610                         case IEEE80211_AC_BK:
1611                                 qparam.cw_max = aCWmax;
1612                                 qparam.cw_min = aCWmin;
1613                                 qparam.txop = 0;
1614                                 if (is_ocb)
1615                                         qparam.aifs = 9;
1616                                 else
1617                                         qparam.aifs = 7;
1618                                 break;
1619                         /* never happens but let's not leave undefined */
1620                         default:
1621                         case IEEE80211_AC_BE:
1622                                 qparam.cw_max = aCWmax;
1623                                 qparam.cw_min = aCWmin;
1624                                 qparam.txop = 0;
1625                                 if (is_ocb)
1626                                         qparam.aifs = 6;
1627                                 else
1628                                         qparam.aifs = 3;
1629                                 break;
1630                         case IEEE80211_AC_VI:
1631                                 qparam.cw_max = aCWmin;
1632                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1633                                 if (is_ocb)
1634                                         qparam.txop = 0;
1635                                 else if (use_11b)
1636                                         qparam.txop = 6016/32;
1637                                 else
1638                                         qparam.txop = 3008/32;
1639
1640                                 if (is_ocb)
1641                                         qparam.aifs = 3;
1642                                 else
1643                                         qparam.aifs = 2;
1644                                 break;
1645                         case IEEE80211_AC_VO:
1646                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1647                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1648                                 if (is_ocb)
1649                                         qparam.txop = 0;
1650                                 else if (use_11b)
1651                                         qparam.txop = 3264/32;
1652                                 else
1653                                         qparam.txop = 1504/32;
1654                                 qparam.aifs = 2;
1655                                 break;
1656                         }
1657                 }
1658                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1659
1660                 qparam.uapsd = false;
1661
1662                 sdata->tx_conf[ac] = qparam;
1663                 drv_conf_tx(local, sdata, ac, &qparam);
1664         }
1665
1666         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1667             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1668             sdata->vif.type != NL80211_IFTYPE_NAN) {
1669                 sdata->vif.bss_conf.qos = enable_qos;
1670                 if (bss_notify)
1671                         ieee80211_bss_info_change_notify(sdata,
1672                                                          BSS_CHANGED_QOS);
1673         }
1674 }
1675
1676 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1677                          u16 transaction, u16 auth_alg, u16 status,
1678                          const u8 *extra, size_t extra_len, const u8 *da,
1679                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1680                          u32 tx_flags)
1681 {
1682         struct ieee80211_local *local = sdata->local;
1683         struct sk_buff *skb;
1684         struct ieee80211_mgmt *mgmt;
1685         int err;
1686
1687         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1688         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1689                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1690         if (!skb)
1691                 return;
1692
1693         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1694
1695         mgmt = skb_put_zero(skb, 24 + 6);
1696         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1697                                           IEEE80211_STYPE_AUTH);
1698         memcpy(mgmt->da, da, ETH_ALEN);
1699         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1700         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1701         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1702         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1703         mgmt->u.auth.status_code = cpu_to_le16(status);
1704         if (extra)
1705                 skb_put_data(skb, extra, extra_len);
1706
1707         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1708                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1709                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1710                 if (WARN_ON(err)) {
1711                         kfree_skb(skb);
1712                         return;
1713                 }
1714         }
1715
1716         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1717                                         tx_flags;
1718         ieee80211_tx_skb(sdata, skb);
1719 }
1720
1721 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1722                                     const u8 *da, const u8 *bssid,
1723                                     u16 stype, u16 reason,
1724                                     bool send_frame, u8 *frame_buf)
1725 {
1726         struct ieee80211_local *local = sdata->local;
1727         struct sk_buff *skb;
1728         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1729
1730         /* build frame */
1731         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1732         mgmt->duration = 0; /* initialize only */
1733         mgmt->seq_ctrl = 0; /* initialize only */
1734         memcpy(mgmt->da, da, ETH_ALEN);
1735         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1736         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1737         /* u.deauth.reason_code == u.disassoc.reason_code */
1738         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1739
1740         if (send_frame) {
1741                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1742                                     IEEE80211_DEAUTH_FRAME_LEN);
1743                 if (!skb)
1744                         return;
1745
1746                 skb_reserve(skb, local->hw.extra_tx_headroom);
1747
1748                 /* copy in frame */
1749                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1750
1751                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1752                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1753                         IEEE80211_SKB_CB(skb)->flags |=
1754                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1755
1756                 ieee80211_tx_skb(sdata, skb);
1757         }
1758 }
1759
1760 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1761 {
1762         if ((end - pos) < 5)
1763                 return pos;
1764
1765         *pos++ = WLAN_EID_EXTENSION;
1766         *pos++ = 1 + sizeof(cap);
1767         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1768         memcpy(pos, &cap, sizeof(cap));
1769
1770         return pos + 2;
1771 }
1772
1773 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1774                                          u8 *buffer, size_t buffer_len,
1775                                          const u8 *ie, size_t ie_len,
1776                                          enum nl80211_band band,
1777                                          u32 rate_mask,
1778                                          struct cfg80211_chan_def *chandef,
1779                                          size_t *offset, u32 flags)
1780 {
1781         struct ieee80211_local *local = sdata->local;
1782         struct ieee80211_supported_band *sband;
1783         const struct ieee80211_sta_he_cap *he_cap;
1784         u8 *pos = buffer, *end = buffer + buffer_len;
1785         size_t noffset;
1786         int supp_rates_len, i;
1787         u8 rates[32];
1788         int num_rates;
1789         int ext_rates_len;
1790         int shift;
1791         u32 rate_flags;
1792         bool have_80mhz = false;
1793
1794         *offset = 0;
1795
1796         sband = local->hw.wiphy->bands[band];
1797         if (WARN_ON_ONCE(!sband))
1798                 return 0;
1799
1800         rate_flags = ieee80211_chandef_rate_flags(chandef);
1801         shift = ieee80211_chandef_get_shift(chandef);
1802
1803         num_rates = 0;
1804         for (i = 0; i < sband->n_bitrates; i++) {
1805                 if ((BIT(i) & rate_mask) == 0)
1806                         continue; /* skip rate */
1807                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1808                         continue;
1809
1810                 rates[num_rates++] =
1811                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1812                                           (1 << shift) * 5);
1813         }
1814
1815         supp_rates_len = min_t(int, num_rates, 8);
1816
1817         if (end - pos < 2 + supp_rates_len)
1818                 goto out_err;
1819         *pos++ = WLAN_EID_SUPP_RATES;
1820         *pos++ = supp_rates_len;
1821         memcpy(pos, rates, supp_rates_len);
1822         pos += supp_rates_len;
1823
1824         /* insert "request information" if in custom IEs */
1825         if (ie && ie_len) {
1826                 static const u8 before_extrates[] = {
1827                         WLAN_EID_SSID,
1828                         WLAN_EID_SUPP_RATES,
1829                         WLAN_EID_REQUEST,
1830                 };
1831                 noffset = ieee80211_ie_split(ie, ie_len,
1832                                              before_extrates,
1833                                              ARRAY_SIZE(before_extrates),
1834                                              *offset);
1835                 if (end - pos < noffset - *offset)
1836                         goto out_err;
1837                 memcpy(pos, ie + *offset, noffset - *offset);
1838                 pos += noffset - *offset;
1839                 *offset = noffset;
1840         }
1841
1842         ext_rates_len = num_rates - supp_rates_len;
1843         if (ext_rates_len > 0) {
1844                 if (end - pos < 2 + ext_rates_len)
1845                         goto out_err;
1846                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1847                 *pos++ = ext_rates_len;
1848                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1849                 pos += ext_rates_len;
1850         }
1851
1852         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1853                 if (end - pos < 3)
1854                         goto out_err;
1855                 *pos++ = WLAN_EID_DS_PARAMS;
1856                 *pos++ = 1;
1857                 *pos++ = ieee80211_frequency_to_channel(
1858                                 chandef->chan->center_freq);
1859         }
1860
1861         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1862                 goto done;
1863
1864         /* insert custom IEs that go before HT */
1865         if (ie && ie_len) {
1866                 static const u8 before_ht[] = {
1867                         /*
1868                          * no need to list the ones split off already
1869                          * (or generated here)
1870                          */
1871                         WLAN_EID_DS_PARAMS,
1872                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1873                 };
1874                 noffset = ieee80211_ie_split(ie, ie_len,
1875                                              before_ht, ARRAY_SIZE(before_ht),
1876                                              *offset);
1877                 if (end - pos < noffset - *offset)
1878                         goto out_err;
1879                 memcpy(pos, ie + *offset, noffset - *offset);
1880                 pos += noffset - *offset;
1881                 *offset = noffset;
1882         }
1883
1884         if (sband->ht_cap.ht_supported) {
1885                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1886                         goto out_err;
1887                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1888                                                 sband->ht_cap.cap);
1889         }
1890
1891         /* insert custom IEs that go before VHT */
1892         if (ie && ie_len) {
1893                 static const u8 before_vht[] = {
1894                         /*
1895                          * no need to list the ones split off already
1896                          * (or generated here)
1897                          */
1898                         WLAN_EID_BSS_COEX_2040,
1899                         WLAN_EID_EXT_CAPABILITY,
1900                         WLAN_EID_SSID_LIST,
1901                         WLAN_EID_CHANNEL_USAGE,
1902                         WLAN_EID_INTERWORKING,
1903                         WLAN_EID_MESH_ID,
1904                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1905                 };
1906                 noffset = ieee80211_ie_split(ie, ie_len,
1907                                              before_vht, ARRAY_SIZE(before_vht),
1908                                              *offset);
1909                 if (end - pos < noffset - *offset)
1910                         goto out_err;
1911                 memcpy(pos, ie + *offset, noffset - *offset);
1912                 pos += noffset - *offset;
1913                 *offset = noffset;
1914         }
1915
1916         /* Check if any channel in this sband supports at least 80 MHz */
1917         for (i = 0; i < sband->n_channels; i++) {
1918                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1919                                                 IEEE80211_CHAN_NO_80MHZ))
1920                         continue;
1921
1922                 have_80mhz = true;
1923                 break;
1924         }
1925
1926         if (sband->vht_cap.vht_supported && have_80mhz) {
1927                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1928                         goto out_err;
1929                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1930                                                  sband->vht_cap.cap);
1931         }
1932
1933         /* insert custom IEs that go before HE */
1934         if (ie && ie_len) {
1935                 static const u8 before_he[] = {
1936                         /*
1937                          * no need to list the ones split off before VHT
1938                          * or generated here
1939                          */
1940                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1941                         WLAN_EID_AP_CSN,
1942                         /* TODO: add 11ah/11aj/11ak elements */
1943                 };
1944                 noffset = ieee80211_ie_split(ie, ie_len,
1945                                              before_he, ARRAY_SIZE(before_he),
1946                                              *offset);
1947                 if (end - pos < noffset - *offset)
1948                         goto out_err;
1949                 memcpy(pos, ie + *offset, noffset - *offset);
1950                 pos += noffset - *offset;
1951                 *offset = noffset;
1952         }
1953
1954         he_cap = ieee80211_get_he_iftype_cap(sband,
1955                                              ieee80211_vif_type_p2p(&sdata->vif));
1956         if (he_cap &&
1957             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1958                                          IEEE80211_CHAN_NO_HE)) {
1959                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1960                 if (!pos)
1961                         goto out_err;
1962         }
1963
1964         if (cfg80211_any_usable_channels(local->hw.wiphy,
1965                                          BIT(NL80211_BAND_6GHZ),
1966                                          IEEE80211_CHAN_NO_HE)) {
1967                 struct ieee80211_supported_band *sband6;
1968
1969                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1970                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1971                                 ieee80211_vif_type_p2p(&sdata->vif));
1972
1973                 if (he_cap) {
1974                         enum nl80211_iftype iftype =
1975                                 ieee80211_vif_type_p2p(&sdata->vif);
1976                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1977
1978                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1979                 }
1980         }
1981
1982         /*
1983          * If adding more here, adjust code in main.c
1984          * that calculates local->scan_ies_len.
1985          */
1986
1987         return pos - buffer;
1988  out_err:
1989         WARN_ONCE(1, "not enough space for preq IEs\n");
1990  done:
1991         return pos - buffer;
1992 }
1993
1994 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1995                              size_t buffer_len,
1996                              struct ieee80211_scan_ies *ie_desc,
1997                              const u8 *ie, size_t ie_len,
1998                              u8 bands_used, u32 *rate_masks,
1999                              struct cfg80211_chan_def *chandef,
2000                              u32 flags)
2001 {
2002         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2003         int i;
2004
2005         memset(ie_desc, 0, sizeof(*ie_desc));
2006
2007         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2008                 if (bands_used & BIT(i)) {
2009                         pos += ieee80211_build_preq_ies_band(sdata,
2010                                                              buffer + pos,
2011                                                              buffer_len - pos,
2012                                                              ie, ie_len, i,
2013                                                              rate_masks[i],
2014                                                              chandef,
2015                                                              &custom_ie_offset,
2016                                                              flags);
2017                         ie_desc->ies[i] = buffer + old_pos;
2018                         ie_desc->len[i] = pos - old_pos;
2019                         old_pos = pos;
2020                 }
2021         }
2022
2023         /* add any remaining custom IEs */
2024         if (ie && ie_len) {
2025                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2026                               "not enough space for preq custom IEs\n"))
2027                         return pos;
2028                 memcpy(buffer + pos, ie + custom_ie_offset,
2029                        ie_len - custom_ie_offset);
2030                 ie_desc->common_ies = buffer + pos;
2031                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2032                 pos += ie_len - custom_ie_offset;
2033         }
2034
2035         return pos;
2036 };
2037
2038 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2039                                           const u8 *src, const u8 *dst,
2040                                           u32 ratemask,
2041                                           struct ieee80211_channel *chan,
2042                                           const u8 *ssid, size_t ssid_len,
2043                                           const u8 *ie, size_t ie_len,
2044                                           u32 flags)
2045 {
2046         struct ieee80211_local *local = sdata->local;
2047         struct cfg80211_chan_def chandef;
2048         struct sk_buff *skb;
2049         struct ieee80211_mgmt *mgmt;
2050         int ies_len;
2051         u32 rate_masks[NUM_NL80211_BANDS] = {};
2052         struct ieee80211_scan_ies dummy_ie_desc;
2053
2054         /*
2055          * Do not send DS Channel parameter for directed probe requests
2056          * in order to maximize the chance that we get a response.  Some
2057          * badly-behaved APs don't respond when this parameter is included.
2058          */
2059         chandef.width = sdata->vif.bss_conf.chandef.width;
2060         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2061                 chandef.chan = NULL;
2062         else
2063                 chandef.chan = chan;
2064
2065         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2066                                      100 + ie_len);
2067         if (!skb)
2068                 return NULL;
2069
2070         rate_masks[chan->band] = ratemask;
2071         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2072                                            skb_tailroom(skb), &dummy_ie_desc,
2073                                            ie, ie_len, BIT(chan->band),
2074                                            rate_masks, &chandef, flags);
2075         skb_put(skb, ies_len);
2076
2077         if (dst) {
2078                 mgmt = (struct ieee80211_mgmt *) skb->data;
2079                 memcpy(mgmt->da, dst, ETH_ALEN);
2080                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2081         }
2082
2083         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2084
2085         return skb;
2086 }
2087
2088 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2089                             struct ieee802_11_elems *elems,
2090                             enum nl80211_band band, u32 *basic_rates)
2091 {
2092         struct ieee80211_supported_band *sband;
2093         size_t num_rates;
2094         u32 supp_rates, rate_flags;
2095         int i, j, shift;
2096
2097         sband = sdata->local->hw.wiphy->bands[band];
2098         if (WARN_ON(!sband))
2099                 return 1;
2100
2101         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2102         shift = ieee80211_vif_get_shift(&sdata->vif);
2103
2104         num_rates = sband->n_bitrates;
2105         supp_rates = 0;
2106         for (i = 0; i < elems->supp_rates_len +
2107                      elems->ext_supp_rates_len; i++) {
2108                 u8 rate = 0;
2109                 int own_rate;
2110                 bool is_basic;
2111                 if (i < elems->supp_rates_len)
2112                         rate = elems->supp_rates[i];
2113                 else if (elems->ext_supp_rates)
2114                         rate = elems->ext_supp_rates
2115                                 [i - elems->supp_rates_len];
2116                 own_rate = 5 * (rate & 0x7f);
2117                 is_basic = !!(rate & 0x80);
2118
2119                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2120                         continue;
2121
2122                 for (j = 0; j < num_rates; j++) {
2123                         int brate;
2124                         if ((rate_flags & sband->bitrates[j].flags)
2125                             != rate_flags)
2126                                 continue;
2127
2128                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2129                                              1 << shift);
2130
2131                         if (brate == own_rate) {
2132                                 supp_rates |= BIT(j);
2133                                 if (basic_rates && is_basic)
2134                                         *basic_rates |= BIT(j);
2135                         }
2136                 }
2137         }
2138         return supp_rates;
2139 }
2140
2141 void ieee80211_stop_device(struct ieee80211_local *local)
2142 {
2143         ieee80211_led_radio(local, false);
2144         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2145
2146         cancel_work_sync(&local->reconfig_filter);
2147
2148         flush_workqueue(local->workqueue);
2149         drv_stop(local);
2150 }
2151
2152 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2153                                            bool aborted)
2154 {
2155         /* It's possible that we don't handle the scan completion in
2156          * time during suspend, so if it's still marked as completed
2157          * here, queue the work and flush it to clean things up.
2158          * Instead of calling the worker function directly here, we
2159          * really queue it to avoid potential races with other flows
2160          * scheduling the same work.
2161          */
2162         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2163                 /* If coming from reconfiguration failure, abort the scan so
2164                  * we don't attempt to continue a partial HW scan - which is
2165                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2166                  * completed scan, and a 5 GHz portion is still pending.
2167                  */
2168                 if (aborted)
2169                         set_bit(SCAN_ABORTED, &local->scanning);
2170                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2171                 flush_delayed_work(&local->scan_work);
2172         }
2173 }
2174
2175 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2176 {
2177         struct ieee80211_sub_if_data *sdata;
2178         struct ieee80211_chanctx *ctx;
2179
2180         /*
2181          * We get here if during resume the device can't be restarted properly.
2182          * We might also get here if this happens during HW reset, which is a
2183          * slightly different situation and we need to drop all connections in
2184          * the latter case.
2185          *
2186          * Ask cfg80211 to turn off all interfaces, this will result in more
2187          * warnings but at least we'll then get into a clean stopped state.
2188          */
2189
2190         local->resuming = false;
2191         local->suspended = false;
2192         local->in_reconfig = false;
2193
2194         ieee80211_flush_completed_scan(local, true);
2195
2196         /* scheduled scan clearly can't be running any more, but tell
2197          * cfg80211 and clear local state
2198          */
2199         ieee80211_sched_scan_end(local);
2200
2201         list_for_each_entry(sdata, &local->interfaces, list)
2202                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2203
2204         /* Mark channel contexts as not being in the driver any more to avoid
2205          * removing them from the driver during the shutdown process...
2206          */
2207         mutex_lock(&local->chanctx_mtx);
2208         list_for_each_entry(ctx, &local->chanctx_list, list)
2209                 ctx->driver_present = false;
2210         mutex_unlock(&local->chanctx_mtx);
2211 }
2212
2213 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2214                                      struct ieee80211_sub_if_data *sdata)
2215 {
2216         struct ieee80211_chanctx_conf *conf;
2217         struct ieee80211_chanctx *ctx;
2218
2219         if (!local->use_chanctx)
2220                 return;
2221
2222         mutex_lock(&local->chanctx_mtx);
2223         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2224                                          lockdep_is_held(&local->chanctx_mtx));
2225         if (conf) {
2226                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2227                 drv_assign_vif_chanctx(local, sdata, ctx);
2228         }
2229         mutex_unlock(&local->chanctx_mtx);
2230 }
2231
2232 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2233 {
2234         struct ieee80211_local *local = sdata->local;
2235         struct sta_info *sta;
2236
2237         /* add STAs back */
2238         mutex_lock(&local->sta_mtx);
2239         list_for_each_entry(sta, &local->sta_list, list) {
2240                 enum ieee80211_sta_state state;
2241
2242                 if (!sta->uploaded || sta->sdata != sdata)
2243                         continue;
2244
2245                 for (state = IEEE80211_STA_NOTEXIST;
2246                      state < sta->sta_state; state++)
2247                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2248                                               state + 1));
2249         }
2250         mutex_unlock(&local->sta_mtx);
2251 }
2252
2253 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2254 {
2255         struct cfg80211_nan_func *func, **funcs;
2256         int res, id, i = 0;
2257
2258         res = drv_start_nan(sdata->local, sdata,
2259                             &sdata->u.nan.conf);
2260         if (WARN_ON(res))
2261                 return res;
2262
2263         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2264                         sizeof(*funcs),
2265                         GFP_KERNEL);
2266         if (!funcs)
2267                 return -ENOMEM;
2268
2269         /* Add all the functions:
2270          * This is a little bit ugly. We need to call a potentially sleeping
2271          * callback for each NAN function, so we can't hold the spinlock.
2272          */
2273         spin_lock_bh(&sdata->u.nan.func_lock);
2274
2275         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2276                 funcs[i++] = func;
2277
2278         spin_unlock_bh(&sdata->u.nan.func_lock);
2279
2280         for (i = 0; funcs[i]; i++) {
2281                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2282                 if (WARN_ON(res))
2283                         ieee80211_nan_func_terminated(&sdata->vif,
2284                                                       funcs[i]->instance_id,
2285                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2286                                                       GFP_KERNEL);
2287         }
2288
2289         kfree(funcs);
2290
2291         return 0;
2292 }
2293
2294 int ieee80211_reconfig(struct ieee80211_local *local)
2295 {
2296         struct ieee80211_hw *hw = &local->hw;
2297         struct ieee80211_sub_if_data *sdata;
2298         struct ieee80211_chanctx *ctx;
2299         struct sta_info *sta;
2300         int res, i;
2301         bool reconfig_due_to_wowlan = false;
2302         struct ieee80211_sub_if_data *sched_scan_sdata;
2303         struct cfg80211_sched_scan_request *sched_scan_req;
2304         bool sched_scan_stopped = false;
2305         bool suspended = local->suspended;
2306
2307         /* nothing to do if HW shouldn't run */
2308         if (!local->open_count)
2309                 goto wake_up;
2310
2311 #ifdef CONFIG_PM
2312         if (suspended)
2313                 local->resuming = true;
2314
2315         if (local->wowlan) {
2316                 /*
2317                  * In the wowlan case, both mac80211 and the device
2318                  * are functional when the resume op is called, so
2319                  * clear local->suspended so the device could operate
2320                  * normally (e.g. pass rx frames).
2321                  */
2322                 local->suspended = false;
2323                 res = drv_resume(local);
2324                 local->wowlan = false;
2325                 if (res < 0) {
2326                         local->resuming = false;
2327                         return res;
2328                 }
2329                 if (res == 0)
2330                         goto wake_up;
2331                 WARN_ON(res > 1);
2332                 /*
2333                  * res is 1, which means the driver requested
2334                  * to go through a regular reset on wakeup.
2335                  * restore local->suspended in this case.
2336                  */
2337                 reconfig_due_to_wowlan = true;
2338                 local->suspended = true;
2339         }
2340 #endif
2341
2342         /*
2343          * In case of hw_restart during suspend (without wowlan),
2344          * cancel restart work, as we are reconfiguring the device
2345          * anyway.
2346          * Note that restart_work is scheduled on a frozen workqueue,
2347          * so we can't deadlock in this case.
2348          */
2349         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2350                 cancel_work_sync(&local->restart_work);
2351
2352         local->started = false;
2353
2354         /*
2355          * Upon resume hardware can sometimes be goofy due to
2356          * various platform / driver / bus issues, so restarting
2357          * the device may at times not work immediately. Propagate
2358          * the error.
2359          */
2360         res = drv_start(local);
2361         if (res) {
2362                 if (suspended)
2363                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2364                 else
2365                         WARN(1, "Hardware became unavailable during restart.\n");
2366                 ieee80211_handle_reconfig_failure(local);
2367                 return res;
2368         }
2369
2370         /* setup fragmentation threshold */
2371         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2372
2373         /* setup RTS threshold */
2374         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2375
2376         /* reset coverage class */
2377         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2378
2379         ieee80211_led_radio(local, true);
2380         ieee80211_mod_tpt_led_trig(local,
2381                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2382
2383         /* add interfaces */
2384         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2385         if (sdata) {
2386                 /* in HW restart it exists already */
2387                 WARN_ON(local->resuming);
2388                 res = drv_add_interface(local, sdata);
2389                 if (WARN_ON(res)) {
2390                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2391                         synchronize_net();
2392                         kfree(sdata);
2393                 }
2394         }
2395
2396         list_for_each_entry(sdata, &local->interfaces, list) {
2397                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2398                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2399                     ieee80211_sdata_running(sdata)) {
2400                         res = drv_add_interface(local, sdata);
2401                         if (WARN_ON(res))
2402                                 break;
2403                 }
2404         }
2405
2406         /* If adding any of the interfaces failed above, roll back and
2407          * report failure.
2408          */
2409         if (res) {
2410                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2411                                                      list)
2412                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2413                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2414                             ieee80211_sdata_running(sdata))
2415                                 drv_remove_interface(local, sdata);
2416                 ieee80211_handle_reconfig_failure(local);
2417                 return res;
2418         }
2419
2420         /* add channel contexts */
2421         if (local->use_chanctx) {
2422                 mutex_lock(&local->chanctx_mtx);
2423                 list_for_each_entry(ctx, &local->chanctx_list, list)
2424                         if (ctx->replace_state !=
2425                             IEEE80211_CHANCTX_REPLACES_OTHER)
2426                                 WARN_ON(drv_add_chanctx(local, ctx));
2427                 mutex_unlock(&local->chanctx_mtx);
2428
2429                 sdata = wiphy_dereference(local->hw.wiphy,
2430                                           local->monitor_sdata);
2431                 if (sdata && ieee80211_sdata_running(sdata))
2432                         ieee80211_assign_chanctx(local, sdata);
2433         }
2434
2435         /* reconfigure hardware */
2436         ieee80211_hw_config(local, ~0);
2437
2438         ieee80211_configure_filter(local);
2439
2440         /* Finally also reconfigure all the BSS information */
2441         list_for_each_entry(sdata, &local->interfaces, list) {
2442                 u32 changed;
2443
2444                 if (!ieee80211_sdata_running(sdata))
2445                         continue;
2446
2447                 ieee80211_assign_chanctx(local, sdata);
2448
2449                 switch (sdata->vif.type) {
2450                 case NL80211_IFTYPE_AP_VLAN:
2451                 case NL80211_IFTYPE_MONITOR:
2452                         break;
2453                 case NL80211_IFTYPE_ADHOC:
2454                         if (sdata->vif.bss_conf.ibss_joined)
2455                                 WARN_ON(drv_join_ibss(local, sdata));
2456                         fallthrough;
2457                 default:
2458                         ieee80211_reconfig_stations(sdata);
2459                         fallthrough;
2460                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2461                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2462                                 drv_conf_tx(local, sdata, i,
2463                                             &sdata->tx_conf[i]);
2464                         break;
2465                 }
2466
2467                 /* common change flags for all interface types */
2468                 changed = BSS_CHANGED_ERP_CTS_PROT |
2469                           BSS_CHANGED_ERP_PREAMBLE |
2470                           BSS_CHANGED_ERP_SLOT |
2471                           BSS_CHANGED_HT |
2472                           BSS_CHANGED_BASIC_RATES |
2473                           BSS_CHANGED_BEACON_INT |
2474                           BSS_CHANGED_BSSID |
2475                           BSS_CHANGED_CQM |
2476                           BSS_CHANGED_QOS |
2477                           BSS_CHANGED_IDLE |
2478                           BSS_CHANGED_TXPOWER |
2479                           BSS_CHANGED_MCAST_RATE;
2480
2481                 if (sdata->vif.mu_mimo_owner)
2482                         changed |= BSS_CHANGED_MU_GROUPS;
2483
2484                 switch (sdata->vif.type) {
2485                 case NL80211_IFTYPE_STATION:
2486                         changed |= BSS_CHANGED_ASSOC |
2487                                    BSS_CHANGED_ARP_FILTER |
2488                                    BSS_CHANGED_PS;
2489
2490                         /* Re-send beacon info report to the driver */
2491                         if (sdata->u.mgd.have_beacon)
2492                                 changed |= BSS_CHANGED_BEACON_INFO;
2493
2494                         if (sdata->vif.bss_conf.max_idle_period ||
2495                             sdata->vif.bss_conf.protected_keep_alive)
2496                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2497
2498                         sdata_lock(sdata);
2499                         ieee80211_bss_info_change_notify(sdata, changed);
2500                         sdata_unlock(sdata);
2501                         break;
2502                 case NL80211_IFTYPE_OCB:
2503                         changed |= BSS_CHANGED_OCB;
2504                         ieee80211_bss_info_change_notify(sdata, changed);
2505                         break;
2506                 case NL80211_IFTYPE_ADHOC:
2507                         changed |= BSS_CHANGED_IBSS;
2508                         fallthrough;
2509                 case NL80211_IFTYPE_AP:
2510                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2511
2512                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2513                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2514                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2515                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2516
2517                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2518                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2519
2520                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2521                                         drv_start_ap(local, sdata);
2522                         }
2523                         fallthrough;
2524                 case NL80211_IFTYPE_MESH_POINT:
2525                         if (sdata->vif.bss_conf.enable_beacon) {
2526                                 changed |= BSS_CHANGED_BEACON |
2527                                            BSS_CHANGED_BEACON_ENABLED;
2528                                 ieee80211_bss_info_change_notify(sdata, changed);
2529                         }
2530                         break;
2531                 case NL80211_IFTYPE_NAN:
2532                         res = ieee80211_reconfig_nan(sdata);
2533                         if (res < 0) {
2534                                 ieee80211_handle_reconfig_failure(local);
2535                                 return res;
2536                         }
2537                         break;
2538                 case NL80211_IFTYPE_AP_VLAN:
2539                 case NL80211_IFTYPE_MONITOR:
2540                 case NL80211_IFTYPE_P2P_DEVICE:
2541                         /* nothing to do */
2542                         break;
2543                 case NL80211_IFTYPE_UNSPECIFIED:
2544                 case NUM_NL80211_IFTYPES:
2545                 case NL80211_IFTYPE_P2P_CLIENT:
2546                 case NL80211_IFTYPE_P2P_GO:
2547                 case NL80211_IFTYPE_WDS:
2548                         WARN_ON(1);
2549                         break;
2550                 }
2551         }
2552
2553         ieee80211_recalc_ps(local);
2554
2555         /*
2556          * The sta might be in psm against the ap (e.g. because
2557          * this was the state before a hw restart), so we
2558          * explicitly send a null packet in order to make sure
2559          * it'll sync against the ap (and get out of psm).
2560          */
2561         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2562                 list_for_each_entry(sdata, &local->interfaces, list) {
2563                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2564                                 continue;
2565                         if (!sdata->u.mgd.associated)
2566                                 continue;
2567
2568                         ieee80211_send_nullfunc(local, sdata, false);
2569                 }
2570         }
2571
2572         /* APs are now beaconing, add back stations */
2573         mutex_lock(&local->sta_mtx);
2574         list_for_each_entry(sta, &local->sta_list, list) {
2575                 enum ieee80211_sta_state state;
2576
2577                 if (!sta->uploaded)
2578                         continue;
2579
2580                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2581                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2582                         continue;
2583
2584                 for (state = IEEE80211_STA_NOTEXIST;
2585                      state < sta->sta_state; state++)
2586                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2587                                               state + 1));
2588         }
2589         mutex_unlock(&local->sta_mtx);
2590
2591         /* add back keys */
2592         list_for_each_entry(sdata, &local->interfaces, list)
2593                 ieee80211_reenable_keys(sdata);
2594
2595         /* Reconfigure sched scan if it was interrupted by FW restart */
2596         mutex_lock(&local->mtx);
2597         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2598                                                 lockdep_is_held(&local->mtx));
2599         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2600                                                 lockdep_is_held(&local->mtx));
2601         if (sched_scan_sdata && sched_scan_req)
2602                 /*
2603                  * Sched scan stopped, but we don't want to report it. Instead,
2604                  * we're trying to reschedule. However, if more than one scan
2605                  * plan was set, we cannot reschedule since we don't know which
2606                  * scan plan was currently running (and some scan plans may have
2607                  * already finished).
2608                  */
2609                 if (sched_scan_req->n_scan_plans > 1 ||
2610                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2611                                                          sched_scan_req)) {
2612                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2613                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2614                         sched_scan_stopped = true;
2615                 }
2616         mutex_unlock(&local->mtx);
2617
2618         if (sched_scan_stopped)
2619                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2620
2621  wake_up:
2622
2623         if (local->monitors == local->open_count && local->monitors > 0)
2624                 ieee80211_add_virtual_monitor(local);
2625
2626         /*
2627          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2628          * sessions can be established after a resume.
2629          *
2630          * Also tear down aggregation sessions since reconfiguring
2631          * them in a hardware restart scenario is not easily done
2632          * right now, and the hardware will have lost information
2633          * about the sessions, but we and the AP still think they
2634          * are active. This is really a workaround though.
2635          */
2636         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2637                 mutex_lock(&local->sta_mtx);
2638
2639                 list_for_each_entry(sta, &local->sta_list, list) {
2640                         if (!local->resuming)
2641                                 ieee80211_sta_tear_down_BA_sessions(
2642                                                 sta, AGG_STOP_LOCAL_REQUEST);
2643                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2644                 }
2645
2646                 mutex_unlock(&local->sta_mtx);
2647         }
2648
2649         if (local->in_reconfig) {
2650                 local->in_reconfig = false;
2651                 barrier();
2652
2653                 /* Restart deferred ROCs */
2654                 mutex_lock(&local->mtx);
2655                 ieee80211_start_next_roc(local);
2656                 mutex_unlock(&local->mtx);
2657
2658                 /* Requeue all works */
2659                 list_for_each_entry(sdata, &local->interfaces, list)
2660                         ieee80211_queue_work(&local->hw, &sdata->work);
2661         }
2662
2663         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2664                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2665                                         false);
2666
2667         /*
2668          * If this is for hw restart things are still running.
2669          * We may want to change that later, however.
2670          */
2671         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2672                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2673
2674         if (!suspended)
2675                 return 0;
2676
2677 #ifdef CONFIG_PM
2678         /* first set suspended false, then resuming */
2679         local->suspended = false;
2680         mb();
2681         local->resuming = false;
2682
2683         ieee80211_flush_completed_scan(local, false);
2684
2685         if (local->open_count && !reconfig_due_to_wowlan)
2686                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2687
2688         list_for_each_entry(sdata, &local->interfaces, list) {
2689                 if (!ieee80211_sdata_running(sdata))
2690                         continue;
2691                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2692                         ieee80211_sta_restart(sdata);
2693         }
2694
2695         mod_timer(&local->sta_cleanup, jiffies + 1);
2696 #else
2697         WARN_ON(1);
2698 #endif
2699
2700         return 0;
2701 }
2702
2703 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2704 {
2705         struct ieee80211_sub_if_data *sdata;
2706         struct ieee80211_local *local;
2707         struct ieee80211_key *key;
2708
2709         if (WARN_ON(!vif))
2710                 return;
2711
2712         sdata = vif_to_sdata(vif);
2713         local = sdata->local;
2714
2715         if (WARN_ON(!local->resuming))
2716                 return;
2717
2718         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2719                 return;
2720
2721         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2722
2723         mutex_lock(&local->key_mtx);
2724         list_for_each_entry(key, &sdata->key_list, list)
2725                 key->flags |= KEY_FLAG_TAINTED;
2726         mutex_unlock(&local->key_mtx);
2727 }
2728 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2729
2730 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2731 {
2732         struct ieee80211_local *local = sdata->local;
2733         struct ieee80211_chanctx_conf *chanctx_conf;
2734         struct ieee80211_chanctx *chanctx;
2735
2736         mutex_lock(&local->chanctx_mtx);
2737
2738         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2739                                         lockdep_is_held(&local->chanctx_mtx));
2740
2741         /*
2742          * This function can be called from a work, thus it may be possible
2743          * that the chanctx_conf is removed (due to a disconnection, for
2744          * example).
2745          * So nothing should be done in such case.
2746          */
2747         if (!chanctx_conf)
2748                 goto unlock;
2749
2750         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2751         ieee80211_recalc_smps_chanctx(local, chanctx);
2752  unlock:
2753         mutex_unlock(&local->chanctx_mtx);
2754 }
2755
2756 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2757 {
2758         struct ieee80211_local *local = sdata->local;
2759         struct ieee80211_chanctx_conf *chanctx_conf;
2760         struct ieee80211_chanctx *chanctx;
2761
2762         mutex_lock(&local->chanctx_mtx);
2763
2764         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2765                                         lockdep_is_held(&local->chanctx_mtx));
2766
2767         if (WARN_ON_ONCE(!chanctx_conf))
2768                 goto unlock;
2769
2770         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2771         ieee80211_recalc_chanctx_min_def(local, chanctx);
2772  unlock:
2773         mutex_unlock(&local->chanctx_mtx);
2774 }
2775
2776 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2777 {
2778         size_t pos = offset;
2779
2780         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2781                 pos += 2 + ies[pos + 1];
2782
2783         return pos;
2784 }
2785
2786 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2787                                             int rssi_min_thold,
2788                                             int rssi_max_thold)
2789 {
2790         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2791
2792         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2793                 return;
2794
2795         /*
2796          * Scale up threshold values before storing it, as the RSSI averaging
2797          * algorithm uses a scaled up value as well. Change this scaling
2798          * factor if the RSSI averaging algorithm changes.
2799          */
2800         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2801         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2802 }
2803
2804 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2805                                     int rssi_min_thold,
2806                                     int rssi_max_thold)
2807 {
2808         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2809
2810         WARN_ON(rssi_min_thold == rssi_max_thold ||
2811                 rssi_min_thold > rssi_max_thold);
2812
2813         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2814                                        rssi_max_thold);
2815 }
2816 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2817
2818 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2819 {
2820         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2821
2822         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2823 }
2824 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2825
2826 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2827                               u16 cap)
2828 {
2829         __le16 tmp;
2830
2831         *pos++ = WLAN_EID_HT_CAPABILITY;
2832         *pos++ = sizeof(struct ieee80211_ht_cap);
2833         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2834
2835         /* capability flags */
2836         tmp = cpu_to_le16(cap);
2837         memcpy(pos, &tmp, sizeof(u16));
2838         pos += sizeof(u16);
2839
2840         /* AMPDU parameters */
2841         *pos++ = ht_cap->ampdu_factor |
2842                  (ht_cap->ampdu_density <<
2843                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2844
2845         /* MCS set */
2846         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2847         pos += sizeof(ht_cap->mcs);
2848
2849         /* extended capabilities */
2850         pos += sizeof(__le16);
2851
2852         /* BF capabilities */
2853         pos += sizeof(__le32);
2854
2855         /* antenna selection */
2856         pos += sizeof(u8);
2857
2858         return pos;
2859 }
2860
2861 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2862                                u32 cap)
2863 {
2864         __le32 tmp;
2865
2866         *pos++ = WLAN_EID_VHT_CAPABILITY;
2867         *pos++ = sizeof(struct ieee80211_vht_cap);
2868         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2869
2870         /* capability flags */
2871         tmp = cpu_to_le32(cap);
2872         memcpy(pos, &tmp, sizeof(u32));
2873         pos += sizeof(u32);
2874
2875         /* VHT MCS set */
2876         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2877         pos += sizeof(vht_cap->vht_mcs);
2878
2879         return pos;
2880 }
2881
2882 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2883 {
2884         const struct ieee80211_sta_he_cap *he_cap;
2885         struct ieee80211_supported_band *sband;
2886         u8 n;
2887
2888         sband = ieee80211_get_sband(sdata);
2889         if (!sband)
2890                 return 0;
2891
2892         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2893         if (!he_cap)
2894                 return 0;
2895
2896         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2897         return 2 + 1 +
2898                sizeof(he_cap->he_cap_elem) + n +
2899                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2900                                      he_cap->he_cap_elem.phy_cap_info);
2901 }
2902
2903 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2904                               const struct ieee80211_sta_he_cap *he_cap,
2905                               u8 *end)
2906 {
2907         u8 n;
2908         u8 ie_len;
2909         u8 *orig_pos = pos;
2910
2911         /* Make sure we have place for the IE */
2912         /*
2913          * TODO: the 1 added is because this temporarily is under the EXTENSION
2914          * IE. Get rid of it when it moves.
2915          */
2916         if (!he_cap)
2917                 return orig_pos;
2918
2919         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2920         ie_len = 2 + 1 +
2921                  sizeof(he_cap->he_cap_elem) + n +
2922                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2923                                        he_cap->he_cap_elem.phy_cap_info);
2924
2925         if ((end - pos) < ie_len)
2926                 return orig_pos;
2927
2928         *pos++ = WLAN_EID_EXTENSION;
2929         pos++; /* We'll set the size later below */
2930         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2931
2932         /* Fixed data */
2933         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2934         pos += sizeof(he_cap->he_cap_elem);
2935
2936         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2937         pos += n;
2938
2939         /* Check if PPE Threshold should be present */
2940         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2941              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2942                 goto end;
2943
2944         /*
2945          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2946          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2947          */
2948         n = hweight8(he_cap->ppe_thres[0] &
2949                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2950         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2951                    IEEE80211_PPE_THRES_NSS_POS));
2952
2953         /*
2954          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2955          * total size.
2956          */
2957         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2958         n = DIV_ROUND_UP(n, 8);
2959
2960         /* Copy PPE Thresholds */
2961         memcpy(pos, &he_cap->ppe_thres, n);
2962         pos += n;
2963
2964 end:
2965         orig_pos[1] = (pos - orig_pos) - 2;
2966         return pos;
2967 }
2968
2969 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2970                                     struct sk_buff *skb)
2971 {
2972         struct ieee80211_supported_band *sband;
2973         const struct ieee80211_sband_iftype_data *iftd;
2974         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2975         u8 *pos;
2976         u16 cap;
2977
2978         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2979                                           BIT(NL80211_BAND_6GHZ),
2980                                           IEEE80211_CHAN_NO_HE))
2981                 return;
2982
2983         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2984
2985         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2986         if (!iftd)
2987                 return;
2988
2989         /* Check for device HE 6 GHz capability before adding element */
2990         if (!iftd->he_6ghz_capa.capa)
2991                 return;
2992
2993         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2994         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2995
2996         switch (sdata->smps_mode) {
2997         case IEEE80211_SMPS_AUTOMATIC:
2998         case IEEE80211_SMPS_NUM_MODES:
2999                 WARN_ON(1);
3000                 fallthrough;
3001         case IEEE80211_SMPS_OFF:
3002                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3003                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3004                 break;
3005         case IEEE80211_SMPS_STATIC:
3006                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3007                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3008                 break;
3009         case IEEE80211_SMPS_DYNAMIC:
3010                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3011                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3012                 break;
3013         }
3014
3015         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3016         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3017                                     pos + 2 + 1 + sizeof(cap));
3018 }
3019
3020 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3021                                const struct cfg80211_chan_def *chandef,
3022                                u16 prot_mode, bool rifs_mode)
3023 {
3024         struct ieee80211_ht_operation *ht_oper;
3025         /* Build HT Information */
3026         *pos++ = WLAN_EID_HT_OPERATION;
3027         *pos++ = sizeof(struct ieee80211_ht_operation);
3028         ht_oper = (struct ieee80211_ht_operation *)pos;
3029         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3030                                         chandef->chan->center_freq);
3031         switch (chandef->width) {
3032         case NL80211_CHAN_WIDTH_160:
3033         case NL80211_CHAN_WIDTH_80P80:
3034         case NL80211_CHAN_WIDTH_80:
3035         case NL80211_CHAN_WIDTH_40:
3036                 if (chandef->center_freq1 > chandef->chan->center_freq)
3037                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3038                 else
3039                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3040                 break;
3041         default:
3042                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3043                 break;
3044         }
3045         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3046             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3047             chandef->width != NL80211_CHAN_WIDTH_20)
3048                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3049
3050         if (rifs_mode)
3051                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3052
3053         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3054         ht_oper->stbc_param = 0x0000;
3055
3056         /* It seems that Basic MCS set and Supported MCS set
3057            are identical for the first 10 bytes */
3058         memset(&ht_oper->basic_set, 0, 16);
3059         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3060
3061         return pos + sizeof(struct ieee80211_ht_operation);
3062 }
3063
3064 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3065                                    const struct cfg80211_chan_def *chandef)
3066 {
3067         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3068         *pos++ = 3;                                     /* IE length */
3069         /* New channel width */
3070         switch (chandef->width) {
3071         case NL80211_CHAN_WIDTH_80:
3072                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3073                 break;
3074         case NL80211_CHAN_WIDTH_160:
3075                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3076                 break;
3077         case NL80211_CHAN_WIDTH_80P80:
3078                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3079                 break;
3080         default:
3081                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3082         }
3083
3084         /* new center frequency segment 0 */
3085         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3086         /* new center frequency segment 1 */
3087         if (chandef->center_freq2)
3088                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3089         else
3090                 *pos++ = 0;
3091 }
3092
3093 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3094                                 const struct cfg80211_chan_def *chandef)
3095 {
3096         struct ieee80211_vht_operation *vht_oper;
3097
3098         *pos++ = WLAN_EID_VHT_OPERATION;
3099         *pos++ = sizeof(struct ieee80211_vht_operation);
3100         vht_oper = (struct ieee80211_vht_operation *)pos;
3101         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3102                                                         chandef->center_freq1);
3103         if (chandef->center_freq2)
3104                 vht_oper->center_freq_seg1_idx =
3105                         ieee80211_frequency_to_channel(chandef->center_freq2);
3106         else
3107                 vht_oper->center_freq_seg1_idx = 0x00;
3108
3109         switch (chandef->width) {
3110         case NL80211_CHAN_WIDTH_160:
3111                 /*
3112                  * Convert 160 MHz channel width to new style as interop
3113                  * workaround.
3114                  */
3115                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3116                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3117                 if (chandef->chan->center_freq < chandef->center_freq1)
3118                         vht_oper->center_freq_seg0_idx -= 8;
3119                 else
3120                         vht_oper->center_freq_seg0_idx += 8;
3121                 break;
3122         case NL80211_CHAN_WIDTH_80P80:
3123                 /*
3124                  * Convert 80+80 MHz channel width to new style as interop
3125                  * workaround.
3126                  */
3127                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3128                 break;
3129         case NL80211_CHAN_WIDTH_80:
3130                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3131                 break;
3132         default:
3133                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3134                 break;
3135         }
3136
3137         /* don't require special VHT peer rates */
3138         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3139
3140         return pos + sizeof(struct ieee80211_vht_operation);
3141 }
3142
3143 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3144 {
3145         struct ieee80211_he_operation *he_oper;
3146         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3147         u32 he_oper_params;
3148         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3149
3150         if (chandef->chan->band == NL80211_BAND_6GHZ)
3151                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3152
3153         *pos++ = WLAN_EID_EXTENSION;
3154         *pos++ = ie_len;
3155         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3156
3157         he_oper_params = 0;
3158         he_oper_params |= u32_encode_bits(1023, /* disabled */
3159                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3160         he_oper_params |= u32_encode_bits(1,
3161                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3162         he_oper_params |= u32_encode_bits(1,
3163                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3164         if (chandef->chan->band == NL80211_BAND_6GHZ)
3165                 he_oper_params |= u32_encode_bits(1,
3166                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3167
3168         he_oper = (struct ieee80211_he_operation *)pos;
3169         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3170
3171         /* don't require special HE peer rates */
3172         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3173         pos += sizeof(struct ieee80211_he_operation);
3174
3175         if (chandef->chan->band != NL80211_BAND_6GHZ)
3176                 goto out;
3177
3178         /* TODO add VHT operational */
3179         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3180         he_6ghz_op->minrate = 6; /* 6 Mbps */
3181         he_6ghz_op->primary =
3182                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3183         he_6ghz_op->ccfs0 =
3184                 ieee80211_frequency_to_channel(chandef->center_freq1);
3185         if (chandef->center_freq2)
3186                 he_6ghz_op->ccfs1 =
3187                         ieee80211_frequency_to_channel(chandef->center_freq2);
3188         else
3189                 he_6ghz_op->ccfs1 = 0;
3190
3191         switch (chandef->width) {
3192         case NL80211_CHAN_WIDTH_160:
3193                 /* Convert 160 MHz channel width to new style as interop
3194                  * workaround.
3195                  */
3196                 he_6ghz_op->control =
3197                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3198                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3199                 if (chandef->chan->center_freq < chandef->center_freq1)
3200                         he_6ghz_op->ccfs0 -= 8;
3201                 else
3202                         he_6ghz_op->ccfs0 += 8;
3203                 fallthrough;
3204         case NL80211_CHAN_WIDTH_80P80:
3205                 he_6ghz_op->control =
3206                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3207                 break;
3208         case NL80211_CHAN_WIDTH_80:
3209                 he_6ghz_op->control =
3210                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3211                 break;
3212         case NL80211_CHAN_WIDTH_40:
3213                 he_6ghz_op->control =
3214                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3215                 break;
3216         default:
3217                 he_6ghz_op->control =
3218                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3219                 break;
3220         }
3221
3222         pos += sizeof(struct ieee80211_he_6ghz_oper);
3223
3224 out:
3225         return pos;
3226 }
3227
3228 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3229                                struct cfg80211_chan_def *chandef)
3230 {
3231         enum nl80211_channel_type channel_type;
3232
3233         if (!ht_oper)
3234                 return false;
3235
3236         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3237         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3238                 channel_type = NL80211_CHAN_HT20;
3239                 break;
3240         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3241                 channel_type = NL80211_CHAN_HT40PLUS;
3242                 break;
3243         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3244                 channel_type = NL80211_CHAN_HT40MINUS;
3245                 break;
3246         default:
3247                 channel_type = NL80211_CHAN_NO_HT;
3248                 return false;
3249         }
3250
3251         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3252         return true;
3253 }
3254
3255 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3256                                 const struct ieee80211_vht_operation *oper,
3257                                 const struct ieee80211_ht_operation *htop,
3258                                 struct cfg80211_chan_def *chandef)
3259 {
3260         struct cfg80211_chan_def new = *chandef;
3261         int cf0, cf1;
3262         int ccfs0, ccfs1, ccfs2;
3263         int ccf0, ccf1;
3264         u32 vht_cap;
3265         bool support_80_80 = false;
3266         bool support_160 = false;
3267         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3268                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3269         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3270                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3271
3272         if (!oper || !htop)
3273                 return false;
3274
3275         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3276         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3277                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3278         support_80_80 = ((vht_cap &
3279                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3280                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3281                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3282                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3283                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3284         ccfs0 = oper->center_freq_seg0_idx;
3285         ccfs1 = oper->center_freq_seg1_idx;
3286         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3287                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3288                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3289
3290         ccf0 = ccfs0;
3291
3292         /* if not supported, parse as though we didn't understand it */
3293         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3294                 ext_nss_bw_supp = 0;
3295
3296         /*
3297          * Cf. IEEE 802.11 Table 9-250
3298          *
3299          * We really just consider that because it's inefficient to connect
3300          * at a higher bandwidth than we'll actually be able to use.
3301          */
3302         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3303         default:
3304         case 0x00:
3305                 ccf1 = 0;
3306                 support_160 = false;
3307                 support_80_80 = false;
3308                 break;
3309         case 0x01:
3310                 support_80_80 = false;
3311                 fallthrough;
3312         case 0x02:
3313         case 0x03:
3314                 ccf1 = ccfs2;
3315                 break;
3316         case 0x10:
3317                 ccf1 = ccfs1;
3318                 break;
3319         case 0x11:
3320         case 0x12:
3321                 if (!ccfs1)
3322                         ccf1 = ccfs2;
3323                 else
3324                         ccf1 = ccfs1;
3325                 break;
3326         case 0x13:
3327         case 0x20:
3328         case 0x23:
3329                 ccf1 = ccfs1;
3330                 break;
3331         }
3332
3333         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3334         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3335
3336         switch (oper->chan_width) {
3337         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3338                 /* just use HT information directly */
3339                 break;
3340         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3341                 new.width = NL80211_CHAN_WIDTH_80;
3342                 new.center_freq1 = cf0;
3343                 /* If needed, adjust based on the newer interop workaround. */
3344                 if (ccf1) {
3345                         unsigned int diff;
3346
3347                         diff = abs(ccf1 - ccf0);
3348                         if ((diff == 8) && support_160) {
3349                                 new.width = NL80211_CHAN_WIDTH_160;
3350                                 new.center_freq1 = cf1;
3351                         } else if ((diff > 8) && support_80_80) {
3352                                 new.width = NL80211_CHAN_WIDTH_80P80;
3353                                 new.center_freq2 = cf1;
3354                         }
3355                 }
3356                 break;
3357         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3358                 /* deprecated encoding */
3359                 new.width = NL80211_CHAN_WIDTH_160;
3360                 new.center_freq1 = cf0;
3361                 break;
3362         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3363                 /* deprecated encoding */
3364                 new.width = NL80211_CHAN_WIDTH_80P80;
3365                 new.center_freq1 = cf0;
3366                 new.center_freq2 = cf1;
3367                 break;
3368         default:
3369                 return false;
3370         }
3371
3372         if (!cfg80211_chandef_valid(&new))
3373                 return false;
3374
3375         *chandef = new;
3376         return true;
3377 }
3378
3379 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3380                                     const struct ieee80211_he_operation *he_oper,
3381                                     struct cfg80211_chan_def *chandef)
3382 {
3383         struct ieee80211_local *local = sdata->local;
3384         struct ieee80211_supported_band *sband;
3385         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3386         const struct ieee80211_sta_he_cap *he_cap;
3387         struct cfg80211_chan_def he_chandef = *chandef;
3388         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3389         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3390         bool support_80_80, support_160;
3391         u8 he_phy_cap;
3392         u32 freq;
3393
3394         if (chandef->chan->band != NL80211_BAND_6GHZ)
3395                 return true;
3396
3397         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3398
3399         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3400         if (!he_cap) {
3401                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3402                 return false;
3403         }
3404
3405         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3406         support_160 =
3407                 he_phy_cap &
3408                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3409         support_80_80 =
3410                 he_phy_cap &
3411                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3412
3413         if (!he_oper) {
3414                 sdata_info(sdata,
3415                            "HE is not advertised on (on %d MHz), expect issues\n",
3416                            chandef->chan->center_freq);
3417                 return false;
3418         }
3419
3420         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3421
3422         if (!he_6ghz_oper) {
3423                 sdata_info(sdata,
3424                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3425                            chandef->chan->center_freq);
3426                 return false;
3427         }
3428
3429         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3430                                               NL80211_BAND_6GHZ);
3431         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3432
3433         switch (u8_get_bits(he_6ghz_oper->control,
3434                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3435         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3436                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3437                 break;
3438         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3439                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3440                 break;
3441         default:
3442                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3443                 break;
3444         }
3445
3446         switch (u8_get_bits(he_6ghz_oper->control,
3447                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3448         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3449                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3450                 break;
3451         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3452                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3453                 break;
3454         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3455                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3456                 break;
3457         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3458                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3459                 if (!he_6ghz_oper->ccfs1)
3460                         break;
3461                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3462                         if (support_160)
3463                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3464                 } else {
3465                         if (support_80_80)
3466                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3467                 }
3468                 break;
3469         }
3470
3471         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3472                 he_chandef.center_freq1 =
3473                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3474                                                        NL80211_BAND_6GHZ);
3475         } else {
3476                 he_chandef.center_freq1 =
3477                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3478                                                        NL80211_BAND_6GHZ);
3479                 if (support_80_80 || support_160)
3480                         he_chandef.center_freq2 =
3481                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3482                                                                NL80211_BAND_6GHZ);
3483         }
3484
3485         if (!cfg80211_chandef_valid(&he_chandef)) {
3486                 sdata_info(sdata,
3487                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3488                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3489                            he_chandef.width,
3490                            he_chandef.center_freq1,
3491                            he_chandef.center_freq2);
3492                 return false;
3493         }
3494
3495         *chandef = he_chandef;
3496
3497         return true;
3498 }
3499
3500 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3501                                 struct cfg80211_chan_def *chandef)
3502 {
3503         u32 oper_freq;
3504
3505         if (!oper)
3506                 return false;
3507
3508         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3509         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3510                 chandef->width = NL80211_CHAN_WIDTH_1;
3511                 break;
3512         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3513                 chandef->width = NL80211_CHAN_WIDTH_2;
3514                 break;
3515         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3516                 chandef->width = NL80211_CHAN_WIDTH_4;
3517                 break;
3518         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3519                 chandef->width = NL80211_CHAN_WIDTH_8;
3520                 break;
3521         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3522                 chandef->width = NL80211_CHAN_WIDTH_16;
3523                 break;
3524         default:
3525                 return false;
3526         }
3527
3528         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3529                                                   NL80211_BAND_S1GHZ);
3530         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3531         chandef->freq1_offset = oper_freq % 1000;
3532
3533         return true;
3534 }
3535
3536 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3537                              const struct ieee80211_supported_band *sband,
3538                              const u8 *srates, int srates_len, u32 *rates)
3539 {
3540         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3541         int shift = ieee80211_chandef_get_shift(chandef);
3542         struct ieee80211_rate *br;
3543         int brate, rate, i, j, count = 0;
3544
3545         *rates = 0;
3546
3547         for (i = 0; i < srates_len; i++) {
3548                 rate = srates[i] & 0x7f;
3549
3550                 for (j = 0; j < sband->n_bitrates; j++) {
3551                         br = &sband->bitrates[j];
3552                         if ((rate_flags & br->flags) != rate_flags)
3553                                 continue;
3554
3555                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3556                         if (brate == rate) {
3557                                 *rates |= BIT(j);
3558                                 count++;
3559                                 break;
3560                         }
3561                 }
3562         }
3563         return count;
3564 }
3565
3566 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3567                             struct sk_buff *skb, bool need_basic,
3568                             enum nl80211_band band)
3569 {
3570         struct ieee80211_local *local = sdata->local;
3571         struct ieee80211_supported_band *sband;
3572         int rate, shift;
3573         u8 i, rates, *pos;
3574         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3575         u32 rate_flags;
3576
3577         shift = ieee80211_vif_get_shift(&sdata->vif);
3578         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3579         sband = local->hw.wiphy->bands[band];
3580         rates = 0;
3581         for (i = 0; i < sband->n_bitrates; i++) {
3582                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3583                         continue;
3584                 rates++;
3585         }
3586         if (rates > 8)
3587                 rates = 8;
3588
3589         if (skb_tailroom(skb) < rates + 2)
3590                 return -ENOMEM;
3591
3592         pos = skb_put(skb, rates + 2);
3593         *pos++ = WLAN_EID_SUPP_RATES;
3594         *pos++ = rates;
3595         for (i = 0; i < rates; i++) {
3596                 u8 basic = 0;
3597                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3598                         continue;
3599
3600                 if (need_basic && basic_rates & BIT(i))
3601                         basic = 0x80;
3602                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3603                                     5 * (1 << shift));
3604                 *pos++ = basic | (u8) rate;
3605         }
3606
3607         return 0;
3608 }
3609
3610 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3611                                 struct sk_buff *skb, bool need_basic,
3612                                 enum nl80211_band band)
3613 {
3614         struct ieee80211_local *local = sdata->local;
3615         struct ieee80211_supported_band *sband;
3616         int rate, shift;
3617         u8 i, exrates, *pos;
3618         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3619         u32 rate_flags;
3620
3621         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3622         shift = ieee80211_vif_get_shift(&sdata->vif);
3623
3624         sband = local->hw.wiphy->bands[band];
3625         exrates = 0;
3626         for (i = 0; i < sband->n_bitrates; i++) {
3627                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3628                         continue;
3629                 exrates++;
3630         }
3631
3632         if (exrates > 8)
3633                 exrates -= 8;
3634         else
3635                 exrates = 0;
3636
3637         if (skb_tailroom(skb) < exrates + 2)
3638                 return -ENOMEM;
3639
3640         if (exrates) {
3641                 pos = skb_put(skb, exrates + 2);
3642                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3643                 *pos++ = exrates;
3644                 for (i = 8; i < sband->n_bitrates; i++) {
3645                         u8 basic = 0;
3646                         if ((rate_flags & sband->bitrates[i].flags)
3647                             != rate_flags)
3648                                 continue;
3649                         if (need_basic && basic_rates & BIT(i))
3650                                 basic = 0x80;
3651                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3652                                             5 * (1 << shift));
3653                         *pos++ = basic | (u8) rate;
3654                 }
3655         }
3656         return 0;
3657 }
3658
3659 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3660 {
3661         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3662         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3663
3664         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3665                 /* non-managed type inferfaces */
3666                 return 0;
3667         }
3668         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3669 }
3670 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3671
3672 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3673 {
3674         if (!mcs)
3675                 return 1;
3676
3677         /* TODO: consider rx_highest */
3678
3679         if (mcs->rx_mask[3])
3680                 return 4;
3681         if (mcs->rx_mask[2])
3682                 return 3;
3683         if (mcs->rx_mask[1])
3684                 return 2;
3685         return 1;
3686 }
3687
3688 /**
3689  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3690  * @local: mac80211 hw info struct
3691  * @status: RX status
3692  * @mpdu_len: total MPDU length (including FCS)
3693  * @mpdu_offset: offset into MPDU to calculate timestamp at
3694  *
3695  * This function calculates the RX timestamp at the given MPDU offset, taking
3696  * into account what the RX timestamp was. An offset of 0 will just normalize
3697  * the timestamp to TSF at beginning of MPDU reception.
3698  */
3699 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3700                                      struct ieee80211_rx_status *status,
3701                                      unsigned int mpdu_len,
3702                                      unsigned int mpdu_offset)
3703 {
3704         u64 ts = status->mactime;
3705         struct rate_info ri;
3706         u16 rate;
3707         u8 n_ltf;
3708
3709         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3710                 return 0;
3711
3712         memset(&ri, 0, sizeof(ri));
3713
3714         ri.bw = status->bw;
3715
3716         /* Fill cfg80211 rate info */
3717         switch (status->encoding) {
3718         case RX_ENC_HE:
3719                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3720                 ri.mcs = status->rate_idx;
3721                 ri.nss = status->nss;
3722                 ri.he_ru_alloc = status->he_ru;
3723                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3724                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3725
3726                 /*
3727                  * See P802.11ax_D6.0, section 27.3.4 for
3728                  * VHT PPDU format.
3729                  */
3730                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3731                         mpdu_offset += 2;
3732                         ts += 36;
3733
3734                         /*
3735                          * TODO:
3736                          * For HE MU PPDU, add the HE-SIG-B.
3737                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3738                          * For HE TB PPDU, add 4us for the HE-STF.
3739                          * Add the HE-LTF durations - variable.
3740                          */
3741                 }
3742
3743                 break;
3744         case RX_ENC_HT:
3745                 ri.mcs = status->rate_idx;
3746                 ri.flags |= RATE_INFO_FLAGS_MCS;
3747                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3748                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3749
3750                 /*
3751                  * See P802.11REVmd_D3.0, section 19.3.2 for
3752                  * HT PPDU format.
3753                  */
3754                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3755                         mpdu_offset += 2;
3756                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3757                                 ts += 24;
3758                         else
3759                                 ts += 32;
3760
3761                         /*
3762                          * Add Data HT-LTFs per streams
3763                          * TODO: add Extension HT-LTFs, 4us per LTF
3764                          */
3765                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3766                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3767                         ts += n_ltf * 4;
3768                 }
3769
3770                 break;
3771         case RX_ENC_VHT:
3772                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3773                 ri.mcs = status->rate_idx;
3774                 ri.nss = status->nss;
3775                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3776                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3777
3778                 /*
3779                  * See P802.11REVmd_D3.0, section 21.3.2 for
3780                  * VHT PPDU format.
3781                  */
3782                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3783                         mpdu_offset += 2;
3784                         ts += 36;
3785
3786                         /*
3787                          * Add VHT-LTFs per streams
3788                          */
3789                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3790                                 ri.nss + 1 : ri.nss;
3791                         ts += 4 * n_ltf;
3792                 }
3793
3794                 break;
3795         default:
3796                 WARN_ON(1);
3797                 fallthrough;
3798         case RX_ENC_LEGACY: {
3799                 struct ieee80211_supported_band *sband;
3800                 int shift = 0;
3801                 int bitrate;
3802
3803                 switch (status->bw) {
3804                 case RATE_INFO_BW_10:
3805                         shift = 1;
3806                         break;
3807                 case RATE_INFO_BW_5:
3808                         shift = 2;
3809                         break;
3810                 }
3811
3812                 sband = local->hw.wiphy->bands[status->band];
3813                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3814                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3815
3816                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3817                         if (status->band == NL80211_BAND_5GHZ) {
3818                                 ts += 20 << shift;
3819                                 mpdu_offset += 2;
3820                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3821                                 ts += 96;
3822                         } else {
3823                                 ts += 192;
3824                         }
3825                 }
3826                 break;
3827                 }
3828         }
3829
3830         rate = cfg80211_calculate_bitrate(&ri);
3831         if (WARN_ONCE(!rate,
3832                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3833                       (unsigned long long)status->flag, status->rate_idx,
3834                       status->nss))
3835                 return 0;
3836
3837         /* rewind from end of MPDU */
3838         if (status->flag & RX_FLAG_MACTIME_END)
3839                 ts -= mpdu_len * 8 * 10 / rate;
3840
3841         ts += mpdu_offset * 8 * 10 / rate;
3842
3843         return ts;
3844 }
3845
3846 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3847 {
3848         struct ieee80211_sub_if_data *sdata;
3849         struct cfg80211_chan_def chandef;
3850
3851         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3852         lockdep_assert_wiphy(local->hw.wiphy);
3853
3854         mutex_lock(&local->mtx);
3855         list_for_each_entry(sdata, &local->interfaces, list) {
3856                 /* it might be waiting for the local->mtx, but then
3857                  * by the time it gets it, sdata->wdev.cac_started
3858                  * will no longer be true
3859                  */
3860                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3861
3862                 if (sdata->wdev.cac_started) {
3863                         chandef = sdata->vif.bss_conf.chandef;
3864                         ieee80211_vif_release_channel(sdata);
3865                         cfg80211_cac_event(sdata->dev,
3866                                            &chandef,
3867                                            NL80211_RADAR_CAC_ABORTED,
3868                                            GFP_KERNEL);
3869                 }
3870         }
3871         mutex_unlock(&local->mtx);
3872 }
3873
3874 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3875 {
3876         struct ieee80211_local *local =
3877                 container_of(work, struct ieee80211_local, radar_detected_work);
3878         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3879         struct ieee80211_chanctx *ctx;
3880         int num_chanctx = 0;
3881
3882         mutex_lock(&local->chanctx_mtx);
3883         list_for_each_entry(ctx, &local->chanctx_list, list) {
3884                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3885                         continue;
3886
3887                 num_chanctx++;
3888                 chandef = ctx->conf.def;
3889         }
3890         mutex_unlock(&local->chanctx_mtx);
3891
3892         wiphy_lock(local->hw.wiphy);
3893         ieee80211_dfs_cac_cancel(local);
3894         wiphy_unlock(local->hw.wiphy);
3895
3896         if (num_chanctx > 1)
3897                 /* XXX: multi-channel is not supported yet */
3898                 WARN_ON(1);
3899         else
3900                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3901 }
3902
3903 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3904 {
3905         struct ieee80211_local *local = hw_to_local(hw);
3906
3907         trace_api_radar_detected(local);
3908
3909         schedule_work(&local->radar_detected_work);
3910 }
3911 EXPORT_SYMBOL(ieee80211_radar_detected);
3912
3913 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3914 {
3915         u32 ret;
3916         int tmp;
3917
3918         switch (c->width) {
3919         case NL80211_CHAN_WIDTH_20:
3920                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3921                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3922                 break;
3923         case NL80211_CHAN_WIDTH_40:
3924                 c->width = NL80211_CHAN_WIDTH_20;
3925                 c->center_freq1 = c->chan->center_freq;
3926                 ret = IEEE80211_STA_DISABLE_40MHZ |
3927                       IEEE80211_STA_DISABLE_VHT;
3928                 break;
3929         case NL80211_CHAN_WIDTH_80:
3930                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3931                 /* n_P40 */
3932                 tmp /= 2;
3933                 /* freq_P40 */
3934                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3935                 c->width = NL80211_CHAN_WIDTH_40;
3936                 ret = IEEE80211_STA_DISABLE_VHT;
3937                 break;
3938         case NL80211_CHAN_WIDTH_80P80:
3939                 c->center_freq2 = 0;
3940                 c->width = NL80211_CHAN_WIDTH_80;
3941                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3942                       IEEE80211_STA_DISABLE_160MHZ;
3943                 break;
3944         case NL80211_CHAN_WIDTH_160:
3945                 /* n_P20 */
3946                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3947                 /* n_P80 */
3948                 tmp /= 4;
3949                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3950                 c->width = NL80211_CHAN_WIDTH_80;
3951                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3952                       IEEE80211_STA_DISABLE_160MHZ;
3953                 break;
3954         default:
3955         case NL80211_CHAN_WIDTH_20_NOHT:
3956                 WARN_ON_ONCE(1);
3957                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3958                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3959                 break;
3960         case NL80211_CHAN_WIDTH_1:
3961         case NL80211_CHAN_WIDTH_2:
3962         case NL80211_CHAN_WIDTH_4:
3963         case NL80211_CHAN_WIDTH_8:
3964         case NL80211_CHAN_WIDTH_16:
3965         case NL80211_CHAN_WIDTH_5:
3966         case NL80211_CHAN_WIDTH_10:
3967                 WARN_ON_ONCE(1);
3968                 /* keep c->width */
3969                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3970                 break;
3971         }
3972
3973         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3974
3975         return ret;
3976 }
3977
3978 /*
3979  * Returns true if smps_mode_new is strictly more restrictive than
3980  * smps_mode_old.
3981  */
3982 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3983                                    enum ieee80211_smps_mode smps_mode_new)
3984 {
3985         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3986                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3987                 return false;
3988
3989         switch (smps_mode_old) {
3990         case IEEE80211_SMPS_STATIC:
3991                 return false;
3992         case IEEE80211_SMPS_DYNAMIC:
3993                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3994         case IEEE80211_SMPS_OFF:
3995                 return smps_mode_new != IEEE80211_SMPS_OFF;
3996         default:
3997                 WARN_ON(1);
3998         }
3999
4000         return false;
4001 }
4002
4003 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4004                               struct cfg80211_csa_settings *csa_settings)
4005 {
4006         struct sk_buff *skb;
4007         struct ieee80211_mgmt *mgmt;
4008         struct ieee80211_local *local = sdata->local;
4009         int freq;
4010         int hdr_len = offsetofend(struct ieee80211_mgmt,
4011                                   u.action.u.chan_switch);
4012         u8 *pos;
4013
4014         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4015             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4016                 return -EOPNOTSUPP;
4017
4018         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4019                             5 + /* channel switch announcement element */
4020                             3 + /* secondary channel offset element */
4021                             5 + /* wide bandwidth channel switch announcement */
4022                             8); /* mesh channel switch parameters element */
4023         if (!skb)
4024                 return -ENOMEM;
4025
4026         skb_reserve(skb, local->tx_headroom);
4027         mgmt = skb_put_zero(skb, hdr_len);
4028         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4029                                           IEEE80211_STYPE_ACTION);
4030
4031         eth_broadcast_addr(mgmt->da);
4032         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4033         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4034                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4035         } else {
4036                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4037                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4038         }
4039         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4040         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4041         pos = skb_put(skb, 5);
4042         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4043         *pos++ = 3;                                             /* IE length */
4044         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4045         freq = csa_settings->chandef.chan->center_freq;
4046         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4047         *pos++ = csa_settings->count;                           /* count */
4048
4049         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4050                 enum nl80211_channel_type ch_type;
4051
4052                 skb_put(skb, 3);
4053                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4054                 *pos++ = 1;                                     /* IE length */
4055                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4056                 if (ch_type == NL80211_CHAN_HT40PLUS)
4057                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4058                 else
4059                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4060         }
4061
4062         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4063                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4064
4065                 skb_put(skb, 8);
4066                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4067                 *pos++ = 6;                                     /* IE length */
4068                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4069                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4070                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4071                 *pos++ |= csa_settings->block_tx ?
4072                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4073                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4074                 pos += 2;
4075                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4076                 pos += 2;
4077         }
4078
4079         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4080             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4081             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4082                 skb_put(skb, 5);
4083                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4084         }
4085
4086         ieee80211_tx_skb(sdata, skb);
4087         return 0;
4088 }
4089
4090 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4091 {
4092         return !(cs == NULL || cs->cipher == 0 ||
4093                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4094                  cs->hdr_len <= cs->key_idx_off ||
4095                  cs->key_idx_shift > 7 ||
4096                  cs->key_idx_mask == 0);
4097 }
4098
4099 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4100 {
4101         int i;
4102
4103         /* Ensure we have enough iftype bitmap space for all iftype values */
4104         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4105
4106         for (i = 0; i < n; i++)
4107                 if (!ieee80211_cs_valid(&cs[i]))
4108                         return false;
4109
4110         return true;
4111 }
4112
4113 const struct ieee80211_cipher_scheme *
4114 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4115                  enum nl80211_iftype iftype)
4116 {
4117         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4118         int n = local->hw.n_cipher_schemes;
4119         int i;
4120         const struct ieee80211_cipher_scheme *cs = NULL;
4121
4122         for (i = 0; i < n; i++) {
4123                 if (l[i].cipher == cipher) {
4124                         cs = &l[i];
4125                         break;
4126                 }
4127         }
4128
4129         if (!cs || !(cs->iftype & BIT(iftype)))
4130                 return NULL;
4131
4132         return cs;
4133 }
4134
4135 int ieee80211_cs_headroom(struct ieee80211_local *local,
4136                           struct cfg80211_crypto_settings *crypto,
4137                           enum nl80211_iftype iftype)
4138 {
4139         const struct ieee80211_cipher_scheme *cs;
4140         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4141         int i;
4142
4143         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4144                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4145                                       iftype);
4146
4147                 if (cs && headroom < cs->hdr_len)
4148                         headroom = cs->hdr_len;
4149         }
4150
4151         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4152         if (cs && headroom < cs->hdr_len)
4153                 headroom = cs->hdr_len;
4154
4155         return headroom;
4156 }
4157
4158 static bool
4159 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4160 {
4161         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4162         int skip;
4163
4164         if (end > 0)
4165                 return false;
4166
4167         /* One shot NOA  */
4168         if (data->count[i] == 1)
4169                 return false;
4170
4171         if (data->desc[i].interval == 0)
4172                 return false;
4173
4174         /* End time is in the past, check for repetitions */
4175         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4176         if (data->count[i] < 255) {
4177                 if (data->count[i] <= skip) {
4178                         data->count[i] = 0;
4179                         return false;
4180                 }
4181
4182                 data->count[i] -= skip;
4183         }
4184
4185         data->desc[i].start += skip * data->desc[i].interval;
4186
4187         return true;
4188 }
4189
4190 static bool
4191 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4192                              s32 *offset)
4193 {
4194         bool ret = false;
4195         int i;
4196
4197         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4198                 s32 cur;
4199
4200                 if (!data->count[i])
4201                         continue;
4202
4203                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4204                         ret = true;
4205
4206                 cur = data->desc[i].start - tsf;
4207                 if (cur > *offset)
4208                         continue;
4209
4210                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4211                 if (cur > *offset)
4212                         *offset = cur;
4213         }
4214
4215         return ret;
4216 }
4217
4218 static u32
4219 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4220 {
4221         s32 offset = 0;
4222         int tries = 0;
4223         /*
4224          * arbitrary limit, used to avoid infinite loops when combined NoA
4225          * descriptors cover the full time period.
4226          */
4227         int max_tries = 5;
4228
4229         ieee80211_extend_absent_time(data, tsf, &offset);
4230         do {
4231                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4232                         break;
4233
4234                 tries++;
4235         } while (tries < max_tries);
4236
4237         return offset;
4238 }
4239
4240 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4241 {
4242         u32 next_offset = BIT(31) - 1;
4243         int i;
4244
4245         data->absent = 0;
4246         data->has_next_tsf = false;
4247         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4248                 s32 start;
4249
4250                 if (!data->count[i])
4251                         continue;
4252
4253                 ieee80211_extend_noa_desc(data, tsf, i);
4254                 start = data->desc[i].start - tsf;
4255                 if (start <= 0)
4256                         data->absent |= BIT(i);
4257
4258                 if (next_offset > start)
4259                         next_offset = start;
4260
4261                 data->has_next_tsf = true;
4262         }
4263
4264         if (data->absent)
4265                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4266
4267         data->next_tsf = tsf + next_offset;
4268 }
4269 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4270
4271 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4272                             struct ieee80211_noa_data *data, u32 tsf)
4273 {
4274         int ret = 0;
4275         int i;
4276
4277         memset(data, 0, sizeof(*data));
4278
4279         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4280                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4281
4282                 if (!desc->count || !desc->duration)
4283                         continue;
4284
4285                 data->count[i] = desc->count;
4286                 data->desc[i].start = le32_to_cpu(desc->start_time);
4287                 data->desc[i].duration = le32_to_cpu(desc->duration);
4288                 data->desc[i].interval = le32_to_cpu(desc->interval);
4289
4290                 if (data->count[i] > 1 &&
4291                     data->desc[i].interval < data->desc[i].duration)
4292                         continue;
4293
4294                 ieee80211_extend_noa_desc(data, tsf, i);
4295                 ret++;
4296         }
4297
4298         if (ret)
4299                 ieee80211_update_p2p_noa(data, tsf);
4300
4301         return ret;
4302 }
4303 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4304
4305 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4306                            struct ieee80211_sub_if_data *sdata)
4307 {
4308         u64 tsf = drv_get_tsf(local, sdata);
4309         u64 dtim_count = 0;
4310         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4311         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4312         struct ps_data *ps;
4313         u8 bcns_from_dtim;
4314
4315         if (tsf == -1ULL || !beacon_int || !dtim_period)
4316                 return;
4317
4318         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4319             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4320                 if (!sdata->bss)
4321                         return;
4322
4323                 ps = &sdata->bss->ps;
4324         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4325                 ps = &sdata->u.mesh.ps;
4326         } else {
4327                 return;
4328         }
4329
4330         /*
4331          * actually finds last dtim_count, mac80211 will update in
4332          * __beacon_add_tim().
4333          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4334          */
4335         do_div(tsf, beacon_int);
4336         bcns_from_dtim = do_div(tsf, dtim_period);
4337         /* just had a DTIM */
4338         if (!bcns_from_dtim)
4339                 dtim_count = 0;
4340         else
4341                 dtim_count = dtim_period - bcns_from_dtim;
4342
4343         ps->dtim_count = dtim_count;
4344 }
4345
4346 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4347                                          struct ieee80211_chanctx *ctx)
4348 {
4349         struct ieee80211_sub_if_data *sdata;
4350         u8 radar_detect = 0;
4351
4352         lockdep_assert_held(&local->chanctx_mtx);
4353
4354         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4355                 return 0;
4356
4357         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4358                 if (sdata->reserved_radar_required)
4359                         radar_detect |= BIT(sdata->reserved_chandef.width);
4360
4361         /*
4362          * An in-place reservation context should not have any assigned vifs
4363          * until it replaces the other context.
4364          */
4365         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4366                 !list_empty(&ctx->assigned_vifs));
4367
4368         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4369                 if (sdata->radar_required)
4370                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4371
4372         return radar_detect;
4373 }
4374
4375 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4376                                  const struct cfg80211_chan_def *chandef,
4377                                  enum ieee80211_chanctx_mode chanmode,
4378                                  u8 radar_detect)
4379 {
4380         struct ieee80211_local *local = sdata->local;
4381         struct ieee80211_sub_if_data *sdata_iter;
4382         enum nl80211_iftype iftype = sdata->wdev.iftype;
4383         struct ieee80211_chanctx *ctx;
4384         int total = 1;
4385         struct iface_combination_params params = {
4386                 .radar_detect = radar_detect,
4387         };
4388
4389         lockdep_assert_held(&local->chanctx_mtx);
4390
4391         if (WARN_ON(hweight32(radar_detect) > 1))
4392                 return -EINVAL;
4393
4394         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4395                     !chandef->chan))
4396                 return -EINVAL;
4397
4398         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4399                 return -EINVAL;
4400
4401         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4402             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4403                 /*
4404                  * always passing this is harmless, since it'll be the
4405                  * same value that cfg80211 finds if it finds the same
4406                  * interface ... and that's always allowed
4407                  */
4408                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4409         }
4410
4411         /* Always allow software iftypes */
4412         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4413                 if (radar_detect)
4414                         return -EINVAL;
4415                 return 0;
4416         }
4417
4418         if (chandef)
4419                 params.num_different_channels = 1;
4420
4421         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4422                 params.iftype_num[iftype] = 1;
4423
4424         list_for_each_entry(ctx, &local->chanctx_list, list) {
4425                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4426                         continue;
4427                 params.radar_detect |=
4428                         ieee80211_chanctx_radar_detect(local, ctx);
4429                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4430                         params.num_different_channels++;
4431                         continue;
4432                 }
4433                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4434                     cfg80211_chandef_compatible(chandef,
4435                                                 &ctx->conf.def))
4436                         continue;
4437                 params.num_different_channels++;
4438         }
4439
4440         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4441                 struct wireless_dev *wdev_iter;
4442
4443                 wdev_iter = &sdata_iter->wdev;
4444
4445                 if (sdata_iter == sdata ||
4446                     !ieee80211_sdata_running(sdata_iter) ||
4447                     cfg80211_iftype_allowed(local->hw.wiphy,
4448                                             wdev_iter->iftype, 0, 1))
4449                         continue;
4450
4451                 params.iftype_num[wdev_iter->iftype]++;
4452                 total++;
4453         }
4454
4455         if (total == 1 && !params.radar_detect)
4456                 return 0;
4457
4458         return cfg80211_check_combinations(local->hw.wiphy, &params);
4459 }
4460
4461 static void
4462 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4463                          void *data)
4464 {
4465         u32 *max_num_different_channels = data;
4466
4467         *max_num_different_channels = max(*max_num_different_channels,
4468                                           c->num_different_channels);
4469 }
4470
4471 int ieee80211_max_num_channels(struct ieee80211_local *local)
4472 {
4473         struct ieee80211_sub_if_data *sdata;
4474         struct ieee80211_chanctx *ctx;
4475         u32 max_num_different_channels = 1;
4476         int err;
4477         struct iface_combination_params params = {0};
4478
4479         lockdep_assert_held(&local->chanctx_mtx);
4480
4481         list_for_each_entry(ctx, &local->chanctx_list, list) {
4482                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4483                         continue;
4484
4485                 params.num_different_channels++;
4486
4487                 params.radar_detect |=
4488                         ieee80211_chanctx_radar_detect(local, ctx);
4489         }
4490
4491         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4492                 params.iftype_num[sdata->wdev.iftype]++;
4493
4494         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4495                                          ieee80211_iter_max_chans,
4496                                          &max_num_different_channels);
4497         if (err < 0)
4498                 return err;
4499
4500         return max_num_different_channels;
4501 }
4502
4503 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4504                                 struct ieee80211_sta_s1g_cap *caps,
4505                                 struct sk_buff *skb)
4506 {
4507         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4508         struct ieee80211_s1g_cap s1g_capab;
4509         u8 *pos;
4510         int i;
4511
4512         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4513                 return;
4514
4515         if (!caps->s1g)
4516                 return;
4517
4518         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4519         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4520
4521         /* override the capability info */
4522         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4523                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4524
4525                 s1g_capab.capab_info[i] &= ~mask;
4526                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4527         }
4528
4529         /* then MCS and NSS set */
4530         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4531                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4532
4533                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4534                 s1g_capab.supp_mcs_nss[i] |=
4535                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4536         }
4537
4538         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4539         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4540         *pos++ = sizeof(s1g_capab);
4541
4542         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4543 }
4544
4545 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4546                                   struct sk_buff *skb)
4547 {
4548         u8 *pos = skb_put(skb, 3);
4549
4550         *pos++ = WLAN_EID_AID_REQUEST;
4551         *pos++ = 1;
4552         *pos++ = 0;
4553 }
4554
4555 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4556 {
4557         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4558         *buf++ = 7; /* len */
4559         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4560         *buf++ = 0x50;
4561         *buf++ = 0xf2;
4562         *buf++ = 2; /* WME */
4563         *buf++ = 0; /* WME info */
4564         *buf++ = 1; /* WME ver */
4565         *buf++ = qosinfo; /* U-APSD no in use */
4566
4567         return buf;
4568 }
4569
4570 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4571                              unsigned long *frame_cnt,
4572                              unsigned long *byte_cnt)
4573 {
4574         struct txq_info *txqi = to_txq_info(txq);
4575         u32 frag_cnt = 0, frag_bytes = 0;
4576         struct sk_buff *skb;
4577
4578         skb_queue_walk(&txqi->frags, skb) {
4579                 frag_cnt++;
4580                 frag_bytes += skb->len;
4581         }
4582
4583         if (frame_cnt)
4584                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4585
4586         if (byte_cnt)
4587                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4588 }
4589 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4590
4591 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4592         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4593         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4594         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4595         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4596 };
4597
4598 u16 ieee80211_encode_usf(int listen_interval)
4599 {
4600         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4601         u16 ui, usf = 0;
4602
4603         /* find greatest USF */
4604         while (usf < IEEE80211_MAX_USF) {
4605                 if (listen_interval % listen_int_usf[usf + 1])
4606                         break;
4607                 usf += 1;
4608         }
4609         ui = listen_interval / listen_int_usf[usf];
4610
4611         /* error if there is a remainder. Should've been checked by user */
4612         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4613         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4614                           FIELD_PREP(LISTEN_INT_UI, ui);
4615
4616         return (u16) listen_interval;
4617 }