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;
 947
 948         if (!elem->datalen)
 949                 return;
 950
 951         len = elem->datalen - 1;
 952
 953         switch (elem->data[0]) {
 954         case WLAN_EID_EXT_HE_MU_EDCA:
 955                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 956                         elems->mu_edca_param_set = data;
 957                         if (crc)
 958                                 *crc = crc32_be(*crc, (void *)elem,
 959                                                 elem->datalen + 2);
 960                 }
 961                 break;
 962         case WLAN_EID_EXT_HE_CAPABILITY:
 963                 elems->he_cap = data;
 964                 elems->he_cap_len = len;
 965                 break;
 966         case WLAN_EID_EXT_HE_OPERATION:
 967                 if (len >= sizeof(*elems->he_operation) &&
 968                     len >= ieee80211_he_oper_size(data) - 1) {
 969                         if (crc)
 970                                 *crc = crc32_be(*crc, (void *)elem,
 971                                                 elem->datalen + 2);
 972                         elems->he_operation = data;
 973                 }
 974                 break;
 975         case WLAN_EID_EXT_UORA:
 976                 if (len >= 1)
 977                         elems->uora_element = data;
 978                 break;
 979         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 980                 if (len == 3)
 981                         elems->max_channel_switch_time = data;
 982                 break;
 983         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 984                 if (len >= sizeof(*elems->mbssid_config_ie))
 985                         elems->mbssid_config_ie = data;
 986                 break;
 987         case WLAN_EID_EXT_HE_SPR:
 988                 if (len >= sizeof(*elems->he_spr) &&
 989                     len >= ieee80211_he_spr_size(data))
 990                         elems->he_spr = data;
 991                 break;
 992         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 993                 if (len >= sizeof(*elems->he_6ghz_capa))
 994                         elems->he_6ghz_capa = data;
 995                 break;
 996         }
 997 }
 998
 999 static u32
1000 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1001                             struct ieee802_11_elems *elems,
1002                             u64 filter, u32 crc,
1003                             const struct element *check_inherit)
1004 {
1005         const struct element *elem;
1006         bool calc_crc = filter != 0;
1007         DECLARE_BITMAP(seen_elems, 256);
1008         const u8 *ie;
1009
1010         bitmap_zero(seen_elems, 256);
1011
1012         for_each_element(elem, start, len) {
1013                 bool elem_parse_failed;
1014                 u8 id = elem->id;
1015                 u8 elen = elem->datalen;
1016                 const u8 *pos = elem->data;
1017
1018                 if (check_inherit &&
1019                     !cfg80211_is_element_inherited(elem,
1020                                                    check_inherit))
1021                         continue;
1022
1023                 switch (id) {
1024                 case WLAN_EID_SSID:
1025                 case WLAN_EID_SUPP_RATES:
1026                 case WLAN_EID_FH_PARAMS:
1027                 case WLAN_EID_DS_PARAMS:
1028                 case WLAN_EID_CF_PARAMS:
1029                 case WLAN_EID_TIM:
1030                 case WLAN_EID_IBSS_PARAMS:
1031                 case WLAN_EID_CHALLENGE:
1032                 case WLAN_EID_RSN:
1033                 case WLAN_EID_ERP_INFO:
1034                 case WLAN_EID_EXT_SUPP_RATES:
1035                 case WLAN_EID_HT_CAPABILITY:
1036                 case WLAN_EID_HT_OPERATION:
1037                 case WLAN_EID_VHT_CAPABILITY:
1038                 case WLAN_EID_VHT_OPERATION:
1039                 case WLAN_EID_MESH_ID:
1040                 case WLAN_EID_MESH_CONFIG:
1041                 case WLAN_EID_PEER_MGMT:
1042                 case WLAN_EID_PREQ:
1043                 case WLAN_EID_PREP:
1044                 case WLAN_EID_PERR:
1045                 case WLAN_EID_RANN:
1046                 case WLAN_EID_CHANNEL_SWITCH:
1047                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1048                 case WLAN_EID_COUNTRY:
1049                 case WLAN_EID_PWR_CONSTRAINT:
1050                 case WLAN_EID_TIMEOUT_INTERVAL:
1051                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1052                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1053                 case WLAN_EID_CHAN_SWITCH_PARAM:
1054                 case WLAN_EID_EXT_CAPABILITY:
1055                 case WLAN_EID_CHAN_SWITCH_TIMING:
1056                 case WLAN_EID_LINK_ID:
1057                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1058                 case WLAN_EID_RSNX:
1059                 case WLAN_EID_S1G_BCN_COMPAT:
1060                 case WLAN_EID_S1G_CAPABILITIES:
1061                 case WLAN_EID_S1G_OPERATION:
1062                 case WLAN_EID_AID_RESPONSE:
1063                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1064                 /*
1065                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1066                  * that if the content gets bigger it might be needed more than once
1067                  */
1068                         if (test_bit(id, seen_elems)) {
1069                                 elems->parse_error = true;
1070                                 continue;
1071                         }
1072                         break;
1073                 }
1074
1075                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1076                         crc = crc32_be(crc, pos - 2, elen + 2);
1077
1078                 elem_parse_failed = false;
1079
1080                 switch (id) {
1081                 case WLAN_EID_LINK_ID:
1082                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1083                                 elem_parse_failed = true;
1084                                 break;
1085                         }
1086                         elems->lnk_id = (void *)(pos - 2);
1087                         break;
1088                 case WLAN_EID_CHAN_SWITCH_TIMING:
1089                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1090                                 elem_parse_failed = true;
1091                                 break;
1092                         }
1093                         elems->ch_sw_timing = (void *)pos;
1094                         break;
1095                 case WLAN_EID_EXT_CAPABILITY:
1096                         elems->ext_capab = pos;
1097                         elems->ext_capab_len = elen;
1098                         break;
1099                 case WLAN_EID_SSID:
1100                         elems->ssid = pos;
1101                         elems->ssid_len = elen;
1102                         break;
1103                 case WLAN_EID_SUPP_RATES:
1104                         elems->supp_rates = pos;
1105                         elems->supp_rates_len = elen;
1106                         break;
1107                 case WLAN_EID_DS_PARAMS:
1108                         if (elen >= 1)
1109                                 elems->ds_params = pos;
1110                         else
1111                                 elem_parse_failed = true;
1112                         break;
1113                 case WLAN_EID_TIM:
1114                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1115                                 elems->tim = (void *)pos;
1116                                 elems->tim_len = elen;
1117                         } else
1118                                 elem_parse_failed = true;
1119                         break;
1120                 case WLAN_EID_CHALLENGE:
1121                         elems->challenge = pos;
1122                         elems->challenge_len = elen;
1123                         break;
1124                 case WLAN_EID_VENDOR_SPECIFIC:
1125                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1126                             pos[2] == 0xf2) {
1127                                 /* Microsoft OUI (00:50:F2) */
1128
1129                                 if (calc_crc)
1130                                         crc = crc32_be(crc, pos - 2, elen + 2);
1131
1132                                 if (elen >= 5 && pos[3] == 2) {
1133                                         /* OUI Type 2 - WMM IE */
1134                                         if (pos[4] == 0) {
1135                                                 elems->wmm_info = pos;
1136                                                 elems->wmm_info_len = elen;
1137                                         } else if (pos[4] == 1) {
1138                                                 elems->wmm_param = pos;
1139                                                 elems->wmm_param_len = elen;
1140                                         }
1141                                 }
1142                         }
1143                         break;
1144                 case WLAN_EID_RSN:
1145                         elems->rsn = pos;
1146                         elems->rsn_len = elen;
1147                         break;
1148                 case WLAN_EID_ERP_INFO:
1149                         if (elen >= 1)
1150                                 elems->erp_info = pos;
1151                         else
1152                                 elem_parse_failed = true;
1153                         break;
1154                 case WLAN_EID_EXT_SUPP_RATES:
1155                         elems->ext_supp_rates = pos;
1156                         elems->ext_supp_rates_len = elen;
1157                         break;
1158                 case WLAN_EID_HT_CAPABILITY:
1159                         if (elen >= sizeof(struct ieee80211_ht_cap))
1160                                 elems->ht_cap_elem = (void *)pos;
1161                         else
1162                                 elem_parse_failed = true;
1163                         break;
1164                 case WLAN_EID_HT_OPERATION:
1165                         if (elen >= sizeof(struct ieee80211_ht_operation))
1166                                 elems->ht_operation = (void *)pos;
1167                         else
1168                                 elem_parse_failed = true;
1169                         break;
1170                 case WLAN_EID_VHT_CAPABILITY:
1171                         if (elen >= sizeof(struct ieee80211_vht_cap))
1172                                 elems->vht_cap_elem = (void *)pos;
1173                         else
1174                                 elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_VHT_OPERATION:
1177                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1178                                 elems->vht_operation = (void *)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_OPMODE_NOTIF:
1186                         if (elen > 0) {
1187                                 elems->opmode_notif = pos;
1188                                 if (calc_crc)
1189                                         crc = crc32_be(crc, pos - 2, elen + 2);
1190                                 break;
1191                         }
1192                         elem_parse_failed = true;
1193                         break;
1194                 case WLAN_EID_MESH_ID:
1195                         elems->mesh_id = pos;
1196                         elems->mesh_id_len = elen;
1197                         break;
1198                 case WLAN_EID_MESH_CONFIG:
1199                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1200                                 elems->mesh_config = (void *)pos;
1201                         else
1202                                 elem_parse_failed = true;
1203                         break;
1204                 case WLAN_EID_PEER_MGMT:
1205                         elems->peering = pos;
1206                         elems->peering_len = elen;
1207                         break;
1208                 case WLAN_EID_MESH_AWAKE_WINDOW:
1209                         if (elen >= 2)
1210                                 elems->awake_window = (void *)pos;
1211                         break;
1212                 case WLAN_EID_PREQ:
1213                         elems->preq = pos;
1214                         elems->preq_len = elen;
1215                         break;
1216                 case WLAN_EID_PREP:
1217                         elems->prep = pos;
1218                         elems->prep_len = elen;
1219                         break;
1220                 case WLAN_EID_PERR:
1221                         elems->perr = pos;
1222                         elems->perr_len = elen;
1223                         break;
1224                 case WLAN_EID_RANN:
1225                         if (elen >= sizeof(struct ieee80211_rann_ie))
1226                                 elems->rann = (void *)pos;
1227                         else
1228                                 elem_parse_failed = true;
1229                         break;
1230                 case WLAN_EID_CHANNEL_SWITCH:
1231                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1232                                 elem_parse_failed = true;
1233                                 break;
1234                         }
1235                         elems->ch_switch_ie = (void *)pos;
1236                         break;
1237                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1238                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1239                                 elem_parse_failed = true;
1240                                 break;
1241                         }
1242                         elems->ext_chansw_ie = (void *)pos;
1243                         break;
1244                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1245                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1246                                 elem_parse_failed = true;
1247                                 break;
1248                         }
1249                         elems->sec_chan_offs = (void *)pos;
1250                         break;
1251                 case WLAN_EID_CHAN_SWITCH_PARAM:
1252                         if (elen <
1253                             sizeof(*elems->mesh_chansw_params_ie)) {
1254                                 elem_parse_failed = true;
1255                                 break;
1256                         }
1257                         elems->mesh_chansw_params_ie = (void *)pos;
1258                         break;
1259                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1260                         if (!action ||
1261                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1262                                 elem_parse_failed = true;
1263                                 break;
1264                         }
1265                         elems->wide_bw_chansw_ie = (void *)pos;
1266                         break;
1267                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1268                         if (action) {
1269                                 elem_parse_failed = true;
1270                                 break;
1271                         }
1272                         /*
1273                          * This is a bit tricky, but as we only care about
1274                          * the wide bandwidth channel switch element, so
1275                          * just parse it out manually.
1276                          */
1277                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1278                                               pos, elen);
1279                         if (ie) {
1280                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1281                                         elems->wide_bw_chansw_ie =
1282                                                 (void *)(ie + 2);
1283                                 else
1284                                         elem_parse_failed = true;
1285                         }
1286                         break;
1287                 case WLAN_EID_COUNTRY:
1288                         elems->country_elem = pos;
1289                         elems->country_elem_len = elen;
1290                         break;
1291                 case WLAN_EID_PWR_CONSTRAINT:
1292                         if (elen != 1) {
1293                                 elem_parse_failed = true;
1294                                 break;
1295                         }
1296                         elems->pwr_constr_elem = pos;
1297                         break;
1298                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1299                         /* Lots of different options exist, but we only care
1300                          * about the Dynamic Transmit Power Control element.
1301                          * First check for the Cisco OUI, then for the DTPC
1302                          * tag (0x00).
1303                          */
1304                         if (elen < 4) {
1305                                 elem_parse_failed = true;
1306                                 break;
1307                         }
1308
1309                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1310                             pos[2] != 0x96 || pos[3] != 0x00)
1311                                 break;
1312
1313                         if (elen != 6) {
1314                                 elem_parse_failed = true;
1315                                 break;
1316                         }
1317
1318                         if (calc_crc)
1319                                 crc = crc32_be(crc, pos - 2, elen + 2);
1320
1321                         elems->cisco_dtpc_elem = pos;
1322                         break;
1323                 case WLAN_EID_ADDBA_EXT:
1324                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1325                                 elem_parse_failed = true;
1326                                 break;
1327                         }
1328                         elems->addba_ext_ie = (void *)pos;
1329                         break;
1330                 case WLAN_EID_TIMEOUT_INTERVAL:
1331                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1332                                 elems->timeout_int = (void *)pos;
1333                         else
1334                                 elem_parse_failed = true;
1335                         break;
1336                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1337                         if (elen >= sizeof(*elems->max_idle_period_ie))
1338                                 elems->max_idle_period_ie = (void *)pos;
1339                         break;
1340                 case WLAN_EID_RSNX:
1341                         elems->rsnx = pos;
1342                         elems->rsnx_len = elen;
1343                         break;
1344                 case WLAN_EID_TX_POWER_ENVELOPE:
1345                         if (elen < 1 ||
1346                             elen > sizeof(struct ieee80211_tx_pwr_env))
1347                                 break;
1348
1349                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1350                                 break;
1351
1352                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1353                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1354                         elems->tx_pwr_env_num++;
1355                         break;
1356                 case WLAN_EID_EXTENSION:
1357                         ieee80211_parse_extension_element(calc_crc ?
1358                                                                 &crc : NULL,
1359                                                           elem, elems);
1360                         break;
1361                 case WLAN_EID_S1G_CAPABILITIES:
1362                         if (elen >= sizeof(*elems->s1g_capab))
1363                                 elems->s1g_capab = (void *)pos;
1364                         else
1365                                 elem_parse_failed = true;
1366                         break;
1367                 case WLAN_EID_S1G_OPERATION:
1368                         if (elen == sizeof(*elems->s1g_oper))
1369                                 elems->s1g_oper = (void *)pos;
1370                         else
1371                                 elem_parse_failed = true;
1372                         break;
1373                 case WLAN_EID_S1G_BCN_COMPAT:
1374                         if (elen == sizeof(*elems->s1g_bcn_compat))
1375                                 elems->s1g_bcn_compat = (void *)pos;
1376                         else
1377                                 elem_parse_failed = true;
1378                         break;
1379                 case WLAN_EID_AID_RESPONSE:
1380                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1381                                 elems->aid_resp = (void *)pos;
1382                         else
1383                                 elem_parse_failed = true;
1384                         break;
1385                 default:
1386                         break;
1387                 }
1388
1389                 if (elem_parse_failed)
1390                         elems->parse_error = true;
1391                 else
1392                         __set_bit(id, seen_elems);
1393         }
1394
1395         if (!for_each_element_completed(elem, start, len))
1396                 elems->parse_error = true;
1397
1398         return crc;
1399 }
1400
1401 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1402                                             struct ieee802_11_elems *elems,
1403                                             u8 *transmitter_bssid,
1404                                             u8 *bss_bssid,
1405                                             u8 *nontransmitted_profile)
1406 {
1407         const struct element *elem, *sub;
1408         size_t profile_len = 0;
1409         bool found = false;
1410
1411         if (!bss_bssid || !transmitter_bssid)
1412                 return profile_len;
1413
1414         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1415                 if (elem->datalen < 2)
1416                         continue;
1417
1418                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1419                         u8 new_bssid[ETH_ALEN];
1420                         const u8 *index;
1421
1422                         if (sub->id != 0 || sub->datalen < 4) {
1423                                 /* not a valid BSS profile */
1424                                 continue;
1425                         }
1426
1427                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1428                             sub->data[1] != 2) {
1429                                 /* The first element of the
1430                                  * Nontransmitted BSSID Profile is not
1431                                  * the Nontransmitted BSSID Capability
1432                                  * element.
1433                                  */
1434                                 continue;
1435                         }
1436
1437                         memset(nontransmitted_profile, 0, len);
1438                         profile_len = cfg80211_merge_profile(start, len,
1439                                                              elem,
1440                                                              sub,
1441                                                              nontransmitted_profile,
1442                                                              len);
1443
1444                         /* found a Nontransmitted BSSID Profile */
1445                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1446                                                  nontransmitted_profile,
1447                                                  profile_len);
1448                         if (!index || index[1] < 1 || index[2] == 0) {
1449                                 /* Invalid MBSSID Index element */
1450                                 continue;
1451                         }
1452
1453                         cfg80211_gen_new_bssid(transmitter_bssid,
1454                                                elem->data[0],
1455                                                index[2],
1456                                                new_bssid);
1457                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1458                                 found = true;
1459                                 elems->bssid_index_len = index[1];
1460                                 elems->bssid_index = (void *)&index[2];
1461                                 break;
1462                         }
1463                 }
1464         }
1465
1466         return found ? profile_len : 0;
1467 }
1468
1469 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1470                                struct ieee802_11_elems *elems,
1471                                u64 filter, u32 crc, u8 *transmitter_bssid,
1472                                u8 *bss_bssid)
1473 {
1474         const struct element *non_inherit = NULL;
1475         u8 *nontransmitted_profile;
1476         int nontransmitted_profile_len = 0;
1477
1478         memset(elems, 0, sizeof(*elems));
1479         elems->ie_start = start;
1480         elems->total_len = len;
1481
1482         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1483         if (nontransmitted_profile) {
1484                 nontransmitted_profile_len =
1485                         ieee802_11_find_bssid_profile(start, len, elems,
1486                                                       transmitter_bssid,
1487                                                       bss_bssid,
1488                                                       nontransmitted_profile);
1489                 non_inherit =
1490                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1491                                                nontransmitted_profile,
1492                                                nontransmitted_profile_len);
1493         }
1494
1495         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1496                                           crc, non_inherit);
1497
1498         /* Override with nontransmitted profile, if found */
1499         if (nontransmitted_profile_len)
1500                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1501                                             nontransmitted_profile_len,
1502                                             action, elems, 0, 0, NULL);
1503
1504         if (elems->tim && !elems->parse_error) {
1505                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1506
1507                 elems->dtim_period = tim_ie->dtim_period;
1508                 elems->dtim_count = tim_ie->dtim_count;
1509         }
1510
1511         /* Override DTIM period and count if needed */
1512         if (elems->bssid_index &&
1513             elems->bssid_index_len >=
1514             offsetofend(struct ieee80211_bssid_index, dtim_period))
1515                 elems->dtim_period = elems->bssid_index->dtim_period;
1516
1517         if (elems->bssid_index &&
1518             elems->bssid_index_len >=
1519             offsetofend(struct ieee80211_bssid_index, dtim_count))
1520                 elems->dtim_count = elems->bssid_index->dtim_count;
1521
1522         kfree(nontransmitted_profile);
1523
1524         return crc;
1525 }
1526
1527 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1528                                            struct ieee80211_tx_queue_params
1529                                            *qparam, int ac)
1530 {
1531         struct ieee80211_chanctx_conf *chanctx_conf;
1532         const struct ieee80211_reg_rule *rrule;
1533         const struct ieee80211_wmm_ac *wmm_ac;
1534         u16 center_freq = 0;
1535
1536         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1537             sdata->vif.type != NL80211_IFTYPE_STATION)
1538                 return;
1539
1540         rcu_read_lock();
1541         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1542         if (chanctx_conf)
1543                 center_freq = chanctx_conf->def.chan->center_freq;
1544
1545         if (!center_freq) {
1546                 rcu_read_unlock();
1547                 return;
1548         }
1549
1550         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1551
1552         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1553                 rcu_read_unlock();
1554                 return;
1555         }
1556
1557         if (sdata->vif.type == NL80211_IFTYPE_AP)
1558                 wmm_ac = &rrule->wmm_rule.ap[ac];
1559         else
1560                 wmm_ac = &rrule->wmm_rule.client[ac];
1561         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1562         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1563         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1564         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1565         rcu_read_unlock();
1566 }
1567
1568 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1569                                bool bss_notify, bool enable_qos)
1570 {
1571         struct ieee80211_local *local = sdata->local;
1572         struct ieee80211_tx_queue_params qparam;
1573         struct ieee80211_chanctx_conf *chanctx_conf;
1574         int ac;
1575         bool use_11b;
1576         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1577         int aCWmin, aCWmax;
1578
1579         if (!local->ops->conf_tx)
1580                 return;
1581
1582         if (local->hw.queues < IEEE80211_NUM_ACS)
1583                 return;
1584
1585         memset(&qparam, 0, sizeof(qparam));
1586
1587         rcu_read_lock();
1588         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1589         use_11b = (chanctx_conf &&
1590                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1591                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1592         rcu_read_unlock();
1593
1594         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1595
1596         /* Set defaults according to 802.11-2007 Table 7-37 */
1597         aCWmax = 1023;
1598         if (use_11b)
1599                 aCWmin = 31;
1600         else
1601                 aCWmin = 15;
1602
1603         /* Confiure old 802.11b/g medium access rules. */
1604         qparam.cw_max = aCWmax;
1605         qparam.cw_min = aCWmin;
1606         qparam.txop = 0;
1607         qparam.aifs = 2;
1608
1609         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1610                 /* Update if QoS is enabled. */
1611                 if (enable_qos) {
1612                         switch (ac) {
1613                         case IEEE80211_AC_BK:
1614                                 qparam.cw_max = aCWmax;
1615                                 qparam.cw_min = aCWmin;
1616                                 qparam.txop = 0;
1617                                 if (is_ocb)
1618                                         qparam.aifs = 9;
1619                                 else
1620                                         qparam.aifs = 7;
1621                                 break;
1622                         /* never happens but let's not leave undefined */
1623                         default:
1624                         case IEEE80211_AC_BE:
1625                                 qparam.cw_max = aCWmax;
1626                                 qparam.cw_min = aCWmin;
1627                                 qparam.txop = 0;
1628                                 if (is_ocb)
1629                                         qparam.aifs = 6;
1630                                 else
1631                                         qparam.aifs = 3;
1632                                 break;
1633                         case IEEE80211_AC_VI:
1634                                 qparam.cw_max = aCWmin;
1635                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1636                                 if (is_ocb)
1637                                         qparam.txop = 0;
1638                                 else if (use_11b)
1639                                         qparam.txop = 6016/32;
1640                                 else
1641                                         qparam.txop = 3008/32;
1642
1643                                 if (is_ocb)
1644                                         qparam.aifs = 3;
1645                                 else
1646                                         qparam.aifs = 2;
1647                                 break;
1648                         case IEEE80211_AC_VO:
1649                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1650                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1651                                 if (is_ocb)
1652                                         qparam.txop = 0;
1653                                 else if (use_11b)
1654                                         qparam.txop = 3264/32;
1655                                 else
1656                                         qparam.txop = 1504/32;
1657                                 qparam.aifs = 2;
1658                                 break;
1659                         }
1660                 }
1661                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1662
1663                 qparam.uapsd = false;
1664
1665                 sdata->tx_conf[ac] = qparam;
1666                 drv_conf_tx(local, sdata, ac, &qparam);
1667         }
1668
1669         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1670             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1671             sdata->vif.type != NL80211_IFTYPE_NAN) {
1672                 sdata->vif.bss_conf.qos = enable_qos;
1673                 if (bss_notify)
1674                         ieee80211_bss_info_change_notify(sdata,
1675                                                          BSS_CHANGED_QOS);
1676         }
1677 }
1678
1679 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1680                          u16 transaction, u16 auth_alg, u16 status,
1681                          const u8 *extra, size_t extra_len, const u8 *da,
1682                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1683                          u32 tx_flags)
1684 {
1685         struct ieee80211_local *local = sdata->local;
1686         struct sk_buff *skb;
1687         struct ieee80211_mgmt *mgmt;
1688         int err;
1689
1690         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1691         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1692                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1693         if (!skb)
1694                 return;
1695
1696         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1697
1698         mgmt = skb_put_zero(skb, 24 + 6);
1699         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1700                                           IEEE80211_STYPE_AUTH);
1701         memcpy(mgmt->da, da, ETH_ALEN);
1702         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1703         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1704         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1705         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1706         mgmt->u.auth.status_code = cpu_to_le16(status);
1707         if (extra)
1708                 skb_put_data(skb, extra, extra_len);
1709
1710         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1711                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1712                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1713                 if (WARN_ON(err)) {
1714                         kfree_skb(skb);
1715                         return;
1716                 }
1717         }
1718
1719         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1720                                         tx_flags;
1721         ieee80211_tx_skb(sdata, skb);
1722 }
1723
1724 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1725                                     const u8 *da, const u8 *bssid,
1726                                     u16 stype, u16 reason,
1727                                     bool send_frame, u8 *frame_buf)
1728 {
1729         struct ieee80211_local *local = sdata->local;
1730         struct sk_buff *skb;
1731         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1732
1733         /* build frame */
1734         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1735         mgmt->duration = 0; /* initialize only */
1736         mgmt->seq_ctrl = 0; /* initialize only */
1737         memcpy(mgmt->da, da, ETH_ALEN);
1738         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1739         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1740         /* u.deauth.reason_code == u.disassoc.reason_code */
1741         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1742
1743         if (send_frame) {
1744                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1745                                     IEEE80211_DEAUTH_FRAME_LEN);
1746                 if (!skb)
1747                         return;
1748
1749                 skb_reserve(skb, local->hw.extra_tx_headroom);
1750
1751                 /* copy in frame */
1752                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1753
1754                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1755                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1756                         IEEE80211_SKB_CB(skb)->flags |=
1757                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1758
1759                 ieee80211_tx_skb(sdata, skb);
1760         }
1761 }
1762
1763 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1764 {
1765         if ((end - pos) < 5)
1766                 return pos;
1767
1768         *pos++ = WLAN_EID_EXTENSION;
1769         *pos++ = 1 + sizeof(cap);
1770         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1771         memcpy(pos, &cap, sizeof(cap));
1772
1773         return pos + 2;
1774 }
1775
1776 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1777                                          u8 *buffer, size_t buffer_len,
1778                                          const u8 *ie, size_t ie_len,
1779                                          enum nl80211_band band,
1780                                          u32 rate_mask,
1781                                          struct cfg80211_chan_def *chandef,
1782                                          size_t *offset, u32 flags)
1783 {
1784         struct ieee80211_local *local = sdata->local;
1785         struct ieee80211_supported_band *sband;
1786         const struct ieee80211_sta_he_cap *he_cap;
1787         u8 *pos = buffer, *end = buffer + buffer_len;
1788         size_t noffset;
1789         int supp_rates_len, i;
1790         u8 rates[32];
1791         int num_rates;
1792         int ext_rates_len;
1793         int shift;
1794         u32 rate_flags;
1795         bool have_80mhz = false;
1796
1797         *offset = 0;
1798
1799         sband = local->hw.wiphy->bands[band];
1800         if (WARN_ON_ONCE(!sband))
1801                 return 0;
1802
1803         rate_flags = ieee80211_chandef_rate_flags(chandef);
1804         shift = ieee80211_chandef_get_shift(chandef);
1805
1806         num_rates = 0;
1807         for (i = 0; i < sband->n_bitrates; i++) {
1808                 if ((BIT(i) & rate_mask) == 0)
1809                         continue; /* skip rate */
1810                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1811                         continue;
1812
1813                 rates[num_rates++] =
1814                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1815                                           (1 << shift) * 5);
1816         }
1817
1818         supp_rates_len = min_t(int, num_rates, 8);
1819
1820         if (end - pos < 2 + supp_rates_len)
1821                 goto out_err;
1822         *pos++ = WLAN_EID_SUPP_RATES;
1823         *pos++ = supp_rates_len;
1824         memcpy(pos, rates, supp_rates_len);
1825         pos += supp_rates_len;
1826
1827         /* insert "request information" if in custom IEs */
1828         if (ie && ie_len) {
1829                 static const u8 before_extrates[] = {
1830                         WLAN_EID_SSID,
1831                         WLAN_EID_SUPP_RATES,
1832                         WLAN_EID_REQUEST,
1833                 };
1834                 noffset = ieee80211_ie_split(ie, ie_len,
1835                                              before_extrates,
1836                                              ARRAY_SIZE(before_extrates),
1837                                              *offset);
1838                 if (end - pos < noffset - *offset)
1839                         goto out_err;
1840                 memcpy(pos, ie + *offset, noffset - *offset);
1841                 pos += noffset - *offset;
1842                 *offset = noffset;
1843         }
1844
1845         ext_rates_len = num_rates - supp_rates_len;
1846         if (ext_rates_len > 0) {
1847                 if (end - pos < 2 + ext_rates_len)
1848                         goto out_err;
1849                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1850                 *pos++ = ext_rates_len;
1851                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1852                 pos += ext_rates_len;
1853         }
1854
1855         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1856                 if (end - pos < 3)
1857                         goto out_err;
1858                 *pos++ = WLAN_EID_DS_PARAMS;
1859                 *pos++ = 1;
1860                 *pos++ = ieee80211_frequency_to_channel(
1861                                 chandef->chan->center_freq);
1862         }
1863
1864         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1865                 goto done;
1866
1867         /* insert custom IEs that go before HT */
1868         if (ie && ie_len) {
1869                 static const u8 before_ht[] = {
1870                         /*
1871                          * no need to list the ones split off already
1872                          * (or generated here)
1873                          */
1874                         WLAN_EID_DS_PARAMS,
1875                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1876                 };
1877                 noffset = ieee80211_ie_split(ie, ie_len,
1878                                              before_ht, ARRAY_SIZE(before_ht),
1879                                              *offset);
1880                 if (end - pos < noffset - *offset)
1881                         goto out_err;
1882                 memcpy(pos, ie + *offset, noffset - *offset);
1883                 pos += noffset - *offset;
1884                 *offset = noffset;
1885         }
1886
1887         if (sband->ht_cap.ht_supported) {
1888                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1889                         goto out_err;
1890                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1891                                                 sband->ht_cap.cap);
1892         }
1893
1894         /* insert custom IEs that go before VHT */
1895         if (ie && ie_len) {
1896                 static const u8 before_vht[] = {
1897                         /*
1898                          * no need to list the ones split off already
1899                          * (or generated here)
1900                          */
1901                         WLAN_EID_BSS_COEX_2040,
1902                         WLAN_EID_EXT_CAPABILITY,
1903                         WLAN_EID_SSID_LIST,
1904                         WLAN_EID_CHANNEL_USAGE,
1905                         WLAN_EID_INTERWORKING,
1906                         WLAN_EID_MESH_ID,
1907                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1908                 };
1909                 noffset = ieee80211_ie_split(ie, ie_len,
1910                                              before_vht, ARRAY_SIZE(before_vht),
1911                                              *offset);
1912                 if (end - pos < noffset - *offset)
1913                         goto out_err;
1914                 memcpy(pos, ie + *offset, noffset - *offset);
1915                 pos += noffset - *offset;
1916                 *offset = noffset;
1917         }
1918
1919         /* Check if any channel in this sband supports at least 80 MHz */
1920         for (i = 0; i < sband->n_channels; i++) {
1921                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1922                                                 IEEE80211_CHAN_NO_80MHZ))
1923                         continue;
1924
1925                 have_80mhz = true;
1926                 break;
1927         }
1928
1929         if (sband->vht_cap.vht_supported && have_80mhz) {
1930                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1931                         goto out_err;
1932                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1933                                                  sband->vht_cap.cap);
1934         }
1935
1936         /* insert custom IEs that go before HE */
1937         if (ie && ie_len) {
1938                 static const u8 before_he[] = {
1939                         /*
1940                          * no need to list the ones split off before VHT
1941                          * or generated here
1942                          */
1943                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1944                         WLAN_EID_AP_CSN,
1945                         /* TODO: add 11ah/11aj/11ak elements */
1946                 };
1947                 noffset = ieee80211_ie_split(ie, ie_len,
1948                                              before_he, ARRAY_SIZE(before_he),
1949                                              *offset);
1950                 if (end - pos < noffset - *offset)
1951                         goto out_err;
1952                 memcpy(pos, ie + *offset, noffset - *offset);
1953                 pos += noffset - *offset;
1954                 *offset = noffset;
1955         }
1956
1957         he_cap = ieee80211_get_he_iftype_cap(sband,
1958                                              ieee80211_vif_type_p2p(&sdata->vif));
1959         if (he_cap &&
1960             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1961                                          IEEE80211_CHAN_NO_HE)) {
1962                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
1963                 if (!pos)
1964                         goto out_err;
1965         }
1966
1967         if (cfg80211_any_usable_channels(local->hw.wiphy,
1968                                          BIT(NL80211_BAND_6GHZ),
1969                                          IEEE80211_CHAN_NO_HE)) {
1970                 struct ieee80211_supported_band *sband6;
1971
1972                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1973                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1974                                 ieee80211_vif_type_p2p(&sdata->vif));
1975
1976                 if (he_cap) {
1977                         enum nl80211_iftype iftype =
1978                                 ieee80211_vif_type_p2p(&sdata->vif);
1979                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1980
1981                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1982                 }
1983         }
1984
1985         /*
1986          * If adding more here, adjust code in main.c
1987          * that calculates local->scan_ies_len.
1988          */
1989
1990         return pos - buffer;
1991  out_err:
1992         WARN_ONCE(1, "not enough space for preq IEs\n");
1993  done:
1994         return pos - buffer;
1995 }
1996
1997 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1998                              size_t buffer_len,
1999                              struct ieee80211_scan_ies *ie_desc,
2000                              const u8 *ie, size_t ie_len,
2001                              u8 bands_used, u32 *rate_masks,
2002                              struct cfg80211_chan_def *chandef,
2003                              u32 flags)
2004 {
2005         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2006         int i;
2007
2008         memset(ie_desc, 0, sizeof(*ie_desc));
2009
2010         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2011                 if (bands_used & BIT(i)) {
2012                         pos += ieee80211_build_preq_ies_band(sdata,
2013                                                              buffer + pos,
2014                                                              buffer_len - pos,
2015                                                              ie, ie_len, i,
2016                                                              rate_masks[i],
2017                                                              chandef,
2018                                                              &custom_ie_offset,
2019                                                              flags);
2020                         ie_desc->ies[i] = buffer + old_pos;
2021                         ie_desc->len[i] = pos - old_pos;
2022                         old_pos = pos;
2023                 }
2024         }
2025
2026         /* add any remaining custom IEs */
2027         if (ie && ie_len) {
2028                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2029                               "not enough space for preq custom IEs\n"))
2030                         return pos;
2031                 memcpy(buffer + pos, ie + custom_ie_offset,
2032                        ie_len - custom_ie_offset);
2033                 ie_desc->common_ies = buffer + pos;
2034                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2035                 pos += ie_len - custom_ie_offset;
2036         }
2037
2038         return pos;
2039 };
2040
2041 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2042                                           const u8 *src, const u8 *dst,
2043                                           u32 ratemask,
2044                                           struct ieee80211_channel *chan,
2045                                           const u8 *ssid, size_t ssid_len,
2046                                           const u8 *ie, size_t ie_len,
2047                                           u32 flags)
2048 {
2049         struct ieee80211_local *local = sdata->local;
2050         struct cfg80211_chan_def chandef;
2051         struct sk_buff *skb;
2052         struct ieee80211_mgmt *mgmt;
2053         int ies_len;
2054         u32 rate_masks[NUM_NL80211_BANDS] = {};
2055         struct ieee80211_scan_ies dummy_ie_desc;
2056
2057         /*
2058          * Do not send DS Channel parameter for directed probe requests
2059          * in order to maximize the chance that we get a response.  Some
2060          * badly-behaved APs don't respond when this parameter is included.
2061          */
2062         chandef.width = sdata->vif.bss_conf.chandef.width;
2063         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2064                 chandef.chan = NULL;
2065         else
2066                 chandef.chan = chan;
2067
2068         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2069                                      100 + ie_len);
2070         if (!skb)
2071                 return NULL;
2072
2073         rate_masks[chan->band] = ratemask;
2074         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2075                                            skb_tailroom(skb), &dummy_ie_desc,
2076                                            ie, ie_len, BIT(chan->band),
2077                                            rate_masks, &chandef, flags);
2078         skb_put(skb, ies_len);
2079
2080         if (dst) {
2081                 mgmt = (struct ieee80211_mgmt *) skb->data;
2082                 memcpy(mgmt->da, dst, ETH_ALEN);
2083                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2084         }
2085
2086         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2087
2088         return skb;
2089 }
2090
2091 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2092                             struct ieee802_11_elems *elems,
2093                             enum nl80211_band band, u32 *basic_rates)
2094 {
2095         struct ieee80211_supported_band *sband;
2096         size_t num_rates;
2097         u32 supp_rates, rate_flags;
2098         int i, j, shift;
2099
2100         sband = sdata->local->hw.wiphy->bands[band];
2101         if (WARN_ON(!sband))
2102                 return 1;
2103
2104         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2105         shift = ieee80211_vif_get_shift(&sdata->vif);
2106
2107         num_rates = sband->n_bitrates;
2108         supp_rates = 0;
2109         for (i = 0; i < elems->supp_rates_len +
2110                      elems->ext_supp_rates_len; i++) {
2111                 u8 rate = 0;
2112                 int own_rate;
2113                 bool is_basic;
2114                 if (i < elems->supp_rates_len)
2115                         rate = elems->supp_rates[i];
2116                 else if (elems->ext_supp_rates)
2117                         rate = elems->ext_supp_rates
2118                                 [i - elems->supp_rates_len];
2119                 own_rate = 5 * (rate & 0x7f);
2120                 is_basic = !!(rate & 0x80);
2121
2122                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2123                         continue;
2124
2125                 for (j = 0; j < num_rates; j++) {
2126                         int brate;
2127                         if ((rate_flags & sband->bitrates[j].flags)
2128                             != rate_flags)
2129                                 continue;
2130
2131                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2132                                              1 << shift);
2133
2134                         if (brate == own_rate) {
2135                                 supp_rates |= BIT(j);
2136                                 if (basic_rates && is_basic)
2137                                         *basic_rates |= BIT(j);
2138                         }
2139                 }
2140         }
2141         return supp_rates;
2142 }
2143
2144 void ieee80211_stop_device(struct ieee80211_local *local)
2145 {
2146         ieee80211_led_radio(local, false);
2147         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2148
2149         cancel_work_sync(&local->reconfig_filter);
2150
2151         flush_workqueue(local->workqueue);
2152         drv_stop(local);
2153 }
2154
2155 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2156                                            bool aborted)
2157 {
2158         /* It's possible that we don't handle the scan completion in
2159          * time during suspend, so if it's still marked as completed
2160          * here, queue the work and flush it to clean things up.
2161          * Instead of calling the worker function directly here, we
2162          * really queue it to avoid potential races with other flows
2163          * scheduling the same work.
2164          */
2165         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2166                 /* If coming from reconfiguration failure, abort the scan so
2167                  * we don't attempt to continue a partial HW scan - which is
2168                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2169                  * completed scan, and a 5 GHz portion is still pending.
2170                  */
2171                 if (aborted)
2172                         set_bit(SCAN_ABORTED, &local->scanning);
2173                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2174                 flush_delayed_work(&local->scan_work);
2175         }
2176 }
2177
2178 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2179 {
2180         struct ieee80211_sub_if_data *sdata;
2181         struct ieee80211_chanctx *ctx;
2182
2183         /*
2184          * We get here if during resume the device can't be restarted properly.
2185          * We might also get here if this happens during HW reset, which is a
2186          * slightly different situation and we need to drop all connections in
2187          * the latter case.
2188          *
2189          * Ask cfg80211 to turn off all interfaces, this will result in more
2190          * warnings but at least we'll then get into a clean stopped state.
2191          */
2192
2193         local->resuming = false;
2194         local->suspended = false;
2195         local->in_reconfig = false;
2196
2197         ieee80211_flush_completed_scan(local, true);
2198
2199         /* scheduled scan clearly can't be running any more, but tell
2200          * cfg80211 and clear local state
2201          */
2202         ieee80211_sched_scan_end(local);
2203
2204         list_for_each_entry(sdata, &local->interfaces, list)
2205                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2206
2207         /* Mark channel contexts as not being in the driver any more to avoid
2208          * removing them from the driver during the shutdown process...
2209          */
2210         mutex_lock(&local->chanctx_mtx);
2211         list_for_each_entry(ctx, &local->chanctx_list, list)
2212                 ctx->driver_present = false;
2213         mutex_unlock(&local->chanctx_mtx);
2214 }
2215
2216 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2217                                      struct ieee80211_sub_if_data *sdata)
2218 {
2219         struct ieee80211_chanctx_conf *conf;
2220         struct ieee80211_chanctx *ctx;
2221
2222         if (!local->use_chanctx)
2223                 return;
2224
2225         mutex_lock(&local->chanctx_mtx);
2226         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2227                                          lockdep_is_held(&local->chanctx_mtx));
2228         if (conf) {
2229                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2230                 drv_assign_vif_chanctx(local, sdata, ctx);
2231         }
2232         mutex_unlock(&local->chanctx_mtx);
2233 }
2234
2235 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2236 {
2237         struct ieee80211_local *local = sdata->local;
2238         struct sta_info *sta;
2239
2240         /* add STAs back */
2241         mutex_lock(&local->sta_mtx);
2242         list_for_each_entry(sta, &local->sta_list, list) {
2243                 enum ieee80211_sta_state state;
2244
2245                 if (!sta->uploaded || sta->sdata != sdata)
2246                         continue;
2247
2248                 for (state = IEEE80211_STA_NOTEXIST;
2249                      state < sta->sta_state; state++)
2250                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2251                                               state + 1));
2252         }
2253         mutex_unlock(&local->sta_mtx);
2254 }
2255
2256 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2257 {
2258         struct cfg80211_nan_func *func, **funcs;
2259         int res, id, i = 0;
2260
2261         res = drv_start_nan(sdata->local, sdata,
2262                             &sdata->u.nan.conf);
2263         if (WARN_ON(res))
2264                 return res;
2265
2266         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2267                         sizeof(*funcs),
2268                         GFP_KERNEL);
2269         if (!funcs)
2270                 return -ENOMEM;
2271
2272         /* Add all the functions:
2273          * This is a little bit ugly. We need to call a potentially sleeping
2274          * callback for each NAN function, so we can't hold the spinlock.
2275          */
2276         spin_lock_bh(&sdata->u.nan.func_lock);
2277
2278         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2279                 funcs[i++] = func;
2280
2281         spin_unlock_bh(&sdata->u.nan.func_lock);
2282
2283         for (i = 0; funcs[i]; i++) {
2284                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2285                 if (WARN_ON(res))
2286                         ieee80211_nan_func_terminated(&sdata->vif,
2287                                                       funcs[i]->instance_id,
2288                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2289                                                       GFP_KERNEL);
2290         }
2291
2292         kfree(funcs);
2293
2294         return 0;
2295 }
2296
2297 int ieee80211_reconfig(struct ieee80211_local *local)
2298 {
2299         struct ieee80211_hw *hw = &local->hw;
2300         struct ieee80211_sub_if_data *sdata;
2301         struct ieee80211_chanctx *ctx;
2302         struct sta_info *sta;
2303         int res, i;
2304         bool reconfig_due_to_wowlan = false;
2305         struct ieee80211_sub_if_data *sched_scan_sdata;
2306         struct cfg80211_sched_scan_request *sched_scan_req;
2307         bool sched_scan_stopped = false;
2308         bool suspended = local->suspended;
2309
2310         /* nothing to do if HW shouldn't run */
2311         if (!local->open_count)
2312                 goto wake_up;
2313
2314 #ifdef CONFIG_PM
2315         if (suspended)
2316                 local->resuming = true;
2317
2318         if (local->wowlan) {
2319                 /*
2320                  * In the wowlan case, both mac80211 and the device
2321                  * are functional when the resume op is called, so
2322                  * clear local->suspended so the device could operate
2323                  * normally (e.g. pass rx frames).
2324                  */
2325                 local->suspended = false;
2326                 res = drv_resume(local);
2327                 local->wowlan = false;
2328                 if (res < 0) {
2329                         local->resuming = false;
2330                         return res;
2331                 }
2332                 if (res == 0)
2333                         goto wake_up;
2334                 WARN_ON(res > 1);
2335                 /*
2336                  * res is 1, which means the driver requested
2337                  * to go through a regular reset on wakeup.
2338                  * restore local->suspended in this case.
2339                  */
2340                 reconfig_due_to_wowlan = true;
2341                 local->suspended = true;
2342         }
2343 #endif
2344
2345         /*
2346          * In case of hw_restart during suspend (without wowlan),
2347          * cancel restart work, as we are reconfiguring the device
2348          * anyway.
2349          * Note that restart_work is scheduled on a frozen workqueue,
2350          * so we can't deadlock in this case.
2351          */
2352         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2353                 cancel_work_sync(&local->restart_work);
2354
2355         local->started = false;
2356
2357         /*
2358          * Upon resume hardware can sometimes be goofy due to
2359          * various platform / driver / bus issues, so restarting
2360          * the device may at times not work immediately. Propagate
2361          * the error.
2362          */
2363         res = drv_start(local);
2364         if (res) {
2365                 if (suspended)
2366                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2367                 else
2368                         WARN(1, "Hardware became unavailable during restart.\n");
2369                 ieee80211_handle_reconfig_failure(local);
2370                 return res;
2371         }
2372
2373         /* setup fragmentation threshold */
2374         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2375
2376         /* setup RTS threshold */
2377         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2378
2379         /* reset coverage class */
2380         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2381
2382         ieee80211_led_radio(local, true);
2383         ieee80211_mod_tpt_led_trig(local,
2384                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2385
2386         /* add interfaces */
2387         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2388         if (sdata) {
2389                 /* in HW restart it exists already */
2390                 WARN_ON(local->resuming);
2391                 res = drv_add_interface(local, sdata);
2392                 if (WARN_ON(res)) {
2393                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2394                         synchronize_net();
2395                         kfree(sdata);
2396                 }
2397         }
2398
2399         list_for_each_entry(sdata, &local->interfaces, list) {
2400                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2401                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2402                     ieee80211_sdata_running(sdata)) {
2403                         res = drv_add_interface(local, sdata);
2404                         if (WARN_ON(res))
2405                                 break;
2406                 }
2407         }
2408
2409         /* If adding any of the interfaces failed above, roll back and
2410          * report failure.
2411          */
2412         if (res) {
2413                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2414                                                      list)
2415                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2416                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2417                             ieee80211_sdata_running(sdata))
2418                                 drv_remove_interface(local, sdata);
2419                 ieee80211_handle_reconfig_failure(local);
2420                 return res;
2421         }
2422
2423         /* add channel contexts */
2424         if (local->use_chanctx) {
2425                 mutex_lock(&local->chanctx_mtx);
2426                 list_for_each_entry(ctx, &local->chanctx_list, list)
2427                         if (ctx->replace_state !=
2428                             IEEE80211_CHANCTX_REPLACES_OTHER)
2429                                 WARN_ON(drv_add_chanctx(local, ctx));
2430                 mutex_unlock(&local->chanctx_mtx);
2431
2432                 sdata = wiphy_dereference(local->hw.wiphy,
2433                                           local->monitor_sdata);
2434                 if (sdata && ieee80211_sdata_running(sdata))
2435                         ieee80211_assign_chanctx(local, sdata);
2436         }
2437
2438         /* reconfigure hardware */
2439         ieee80211_hw_config(local, ~0);
2440
2441         ieee80211_configure_filter(local);
2442
2443         /* Finally also reconfigure all the BSS information */
2444         list_for_each_entry(sdata, &local->interfaces, list) {
2445                 u32 changed;
2446
2447                 if (!ieee80211_sdata_running(sdata))
2448                         continue;
2449
2450                 ieee80211_assign_chanctx(local, sdata);
2451
2452                 switch (sdata->vif.type) {
2453                 case NL80211_IFTYPE_AP_VLAN:
2454                 case NL80211_IFTYPE_MONITOR:
2455                         break;
2456                 case NL80211_IFTYPE_ADHOC:
2457                         if (sdata->vif.bss_conf.ibss_joined)
2458                                 WARN_ON(drv_join_ibss(local, sdata));
2459                         fallthrough;
2460                 default:
2461                         ieee80211_reconfig_stations(sdata);
2462                         fallthrough;
2463                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2464                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2465                                 drv_conf_tx(local, sdata, i,
2466                                             &sdata->tx_conf[i]);
2467                         break;
2468                 }
2469
2470                 /* common change flags for all interface types */
2471                 changed = BSS_CHANGED_ERP_CTS_PROT |
2472                           BSS_CHANGED_ERP_PREAMBLE |
2473                           BSS_CHANGED_ERP_SLOT |
2474                           BSS_CHANGED_HT |
2475                           BSS_CHANGED_BASIC_RATES |
2476                           BSS_CHANGED_BEACON_INT |
2477                           BSS_CHANGED_BSSID |
2478                           BSS_CHANGED_CQM |
2479                           BSS_CHANGED_QOS |
2480                           BSS_CHANGED_IDLE |
2481                           BSS_CHANGED_TXPOWER |
2482                           BSS_CHANGED_MCAST_RATE;
2483
2484                 if (sdata->vif.mu_mimo_owner)
2485                         changed |= BSS_CHANGED_MU_GROUPS;
2486
2487                 switch (sdata->vif.type) {
2488                 case NL80211_IFTYPE_STATION:
2489                         changed |= BSS_CHANGED_ASSOC |
2490                                    BSS_CHANGED_ARP_FILTER |
2491                                    BSS_CHANGED_PS;
2492
2493                         /* Re-send beacon info report to the driver */
2494                         if (sdata->u.mgd.have_beacon)
2495                                 changed |= BSS_CHANGED_BEACON_INFO;
2496
2497                         if (sdata->vif.bss_conf.max_idle_period ||
2498                             sdata->vif.bss_conf.protected_keep_alive)
2499                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2500
2501                         sdata_lock(sdata);
2502                         ieee80211_bss_info_change_notify(sdata, changed);
2503                         sdata_unlock(sdata);
2504                         break;
2505                 case NL80211_IFTYPE_OCB:
2506                         changed |= BSS_CHANGED_OCB;
2507                         ieee80211_bss_info_change_notify(sdata, changed);
2508                         break;
2509                 case NL80211_IFTYPE_ADHOC:
2510                         changed |= BSS_CHANGED_IBSS;
2511                         fallthrough;
2512                 case NL80211_IFTYPE_AP:
2513                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2514
2515                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2516                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2517                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2518                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2519
2520                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2521                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2522
2523                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2524                                         drv_start_ap(local, sdata);
2525                         }
2526                         fallthrough;
2527                 case NL80211_IFTYPE_MESH_POINT:
2528                         if (sdata->vif.bss_conf.enable_beacon) {
2529                                 changed |= BSS_CHANGED_BEACON |
2530                                            BSS_CHANGED_BEACON_ENABLED;
2531                                 ieee80211_bss_info_change_notify(sdata, changed);
2532                         }
2533                         break;
2534                 case NL80211_IFTYPE_NAN:
2535                         res = ieee80211_reconfig_nan(sdata);
2536                         if (res < 0) {
2537                                 ieee80211_handle_reconfig_failure(local);
2538                                 return res;
2539                         }
2540                         break;
2541                 case NL80211_IFTYPE_AP_VLAN:
2542                 case NL80211_IFTYPE_MONITOR:
2543                 case NL80211_IFTYPE_P2P_DEVICE:
2544                         /* nothing to do */
2545                         break;
2546                 case NL80211_IFTYPE_UNSPECIFIED:
2547                 case NUM_NL80211_IFTYPES:
2548                 case NL80211_IFTYPE_P2P_CLIENT:
2549                 case NL80211_IFTYPE_P2P_GO:
2550                 case NL80211_IFTYPE_WDS:
2551                         WARN_ON(1);
2552                         break;
2553                 }
2554         }
2555
2556         ieee80211_recalc_ps(local);
2557
2558         /*
2559          * The sta might be in psm against the ap (e.g. because
2560          * this was the state before a hw restart), so we
2561          * explicitly send a null packet in order to make sure
2562          * it'll sync against the ap (and get out of psm).
2563          */
2564         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2565                 list_for_each_entry(sdata, &local->interfaces, list) {
2566                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2567                                 continue;
2568                         if (!sdata->u.mgd.associated)
2569                                 continue;
2570
2571                         ieee80211_send_nullfunc(local, sdata, false);
2572                 }
2573         }
2574
2575         /* APs are now beaconing, add back stations */
2576         mutex_lock(&local->sta_mtx);
2577         list_for_each_entry(sta, &local->sta_list, list) {
2578                 enum ieee80211_sta_state state;
2579
2580                 if (!sta->uploaded)
2581                         continue;
2582
2583                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2584                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2585                         continue;
2586
2587                 for (state = IEEE80211_STA_NOTEXIST;
2588                      state < sta->sta_state; state++)
2589                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2590                                               state + 1));
2591         }
2592         mutex_unlock(&local->sta_mtx);
2593
2594         /* add back keys */
2595         list_for_each_entry(sdata, &local->interfaces, list)
2596                 ieee80211_reenable_keys(sdata);
2597
2598         /* Reconfigure sched scan if it was interrupted by FW restart */
2599         mutex_lock(&local->mtx);
2600         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2601                                                 lockdep_is_held(&local->mtx));
2602         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2603                                                 lockdep_is_held(&local->mtx));
2604         if (sched_scan_sdata && sched_scan_req)
2605                 /*
2606                  * Sched scan stopped, but we don't want to report it. Instead,
2607                  * we're trying to reschedule. However, if more than one scan
2608                  * plan was set, we cannot reschedule since we don't know which
2609                  * scan plan was currently running (and some scan plans may have
2610                  * already finished).
2611                  */
2612                 if (sched_scan_req->n_scan_plans > 1 ||
2613                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2614                                                          sched_scan_req)) {
2615                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2616                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2617                         sched_scan_stopped = true;
2618                 }
2619         mutex_unlock(&local->mtx);
2620
2621         if (sched_scan_stopped)
2622                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2623
2624  wake_up:
2625
2626         if (local->monitors == local->open_count && local->monitors > 0)
2627                 ieee80211_add_virtual_monitor(local);
2628
2629         /*
2630          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2631          * sessions can be established after a resume.
2632          *
2633          * Also tear down aggregation sessions since reconfiguring
2634          * them in a hardware restart scenario is not easily done
2635          * right now, and the hardware will have lost information
2636          * about the sessions, but we and the AP still think they
2637          * are active. This is really a workaround though.
2638          */
2639         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2640                 mutex_lock(&local->sta_mtx);
2641
2642                 list_for_each_entry(sta, &local->sta_list, list) {
2643                         if (!local->resuming)
2644                                 ieee80211_sta_tear_down_BA_sessions(
2645                                                 sta, AGG_STOP_LOCAL_REQUEST);
2646                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2647                 }
2648
2649                 mutex_unlock(&local->sta_mtx);
2650         }
2651
2652         if (local->in_reconfig) {
2653                 local->in_reconfig = false;
2654                 barrier();
2655
2656                 /* Restart deferred ROCs */
2657                 mutex_lock(&local->mtx);
2658                 ieee80211_start_next_roc(local);
2659                 mutex_unlock(&local->mtx);
2660
2661                 /* Requeue all works */
2662                 list_for_each_entry(sdata, &local->interfaces, list)
2663                         ieee80211_queue_work(&local->hw, &sdata->work);
2664         }
2665
2666         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2667                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2668                                         false);
2669
2670         /*
2671          * If this is for hw restart things are still running.
2672          * We may want to change that later, however.
2673          */
2674         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2675                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2676
2677         if (!suspended)
2678                 return 0;
2679
2680 #ifdef CONFIG_PM
2681         /* first set suspended false, then resuming */
2682         local->suspended = false;
2683         mb();
2684         local->resuming = false;
2685
2686         ieee80211_flush_completed_scan(local, false);
2687
2688         if (local->open_count && !reconfig_due_to_wowlan)
2689                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2690
2691         list_for_each_entry(sdata, &local->interfaces, list) {
2692                 if (!ieee80211_sdata_running(sdata))
2693                         continue;
2694                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2695                         ieee80211_sta_restart(sdata);
2696         }
2697
2698         mod_timer(&local->sta_cleanup, jiffies + 1);
2699 #else
2700         WARN_ON(1);
2701 #endif
2702
2703         return 0;
2704 }
2705
2706 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2707 {
2708         struct ieee80211_sub_if_data *sdata;
2709         struct ieee80211_local *local;
2710         struct ieee80211_key *key;
2711
2712         if (WARN_ON(!vif))
2713                 return;
2714
2715         sdata = vif_to_sdata(vif);
2716         local = sdata->local;
2717
2718         if (WARN_ON(!local->resuming))
2719                 return;
2720
2721         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2722                 return;
2723
2724         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2725
2726         mutex_lock(&local->key_mtx);
2727         list_for_each_entry(key, &sdata->key_list, list)
2728                 key->flags |= KEY_FLAG_TAINTED;
2729         mutex_unlock(&local->key_mtx);
2730 }
2731 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2732
2733 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2734 {
2735         struct ieee80211_local *local = sdata->local;
2736         struct ieee80211_chanctx_conf *chanctx_conf;
2737         struct ieee80211_chanctx *chanctx;
2738
2739         mutex_lock(&local->chanctx_mtx);
2740
2741         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2742                                         lockdep_is_held(&local->chanctx_mtx));
2743
2744         /*
2745          * This function can be called from a work, thus it may be possible
2746          * that the chanctx_conf is removed (due to a disconnection, for
2747          * example).
2748          * So nothing should be done in such case.
2749          */
2750         if (!chanctx_conf)
2751                 goto unlock;
2752
2753         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2754         ieee80211_recalc_smps_chanctx(local, chanctx);
2755  unlock:
2756         mutex_unlock(&local->chanctx_mtx);
2757 }
2758
2759 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2760 {
2761         struct ieee80211_local *local = sdata->local;
2762         struct ieee80211_chanctx_conf *chanctx_conf;
2763         struct ieee80211_chanctx *chanctx;
2764
2765         mutex_lock(&local->chanctx_mtx);
2766
2767         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2768                                         lockdep_is_held(&local->chanctx_mtx));
2769
2770         if (WARN_ON_ONCE(!chanctx_conf))
2771                 goto unlock;
2772
2773         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2774         ieee80211_recalc_chanctx_min_def(local, chanctx);
2775  unlock:
2776         mutex_unlock(&local->chanctx_mtx);
2777 }
2778
2779 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2780 {
2781         size_t pos = offset;
2782
2783         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2784                 pos += 2 + ies[pos + 1];
2785
2786         return pos;
2787 }
2788
2789 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2790                                             int rssi_min_thold,
2791                                             int rssi_max_thold)
2792 {
2793         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2794
2795         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2796                 return;
2797
2798         /*
2799          * Scale up threshold values before storing it, as the RSSI averaging
2800          * algorithm uses a scaled up value as well. Change this scaling
2801          * factor if the RSSI averaging algorithm changes.
2802          */
2803         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2804         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2805 }
2806
2807 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2808                                     int rssi_min_thold,
2809                                     int rssi_max_thold)
2810 {
2811         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2812
2813         WARN_ON(rssi_min_thold == rssi_max_thold ||
2814                 rssi_min_thold > rssi_max_thold);
2815
2816         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2817                                        rssi_max_thold);
2818 }
2819 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2820
2821 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2822 {
2823         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2824
2825         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2826 }
2827 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2828
2829 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2830                               u16 cap)
2831 {
2832         __le16 tmp;
2833
2834         *pos++ = WLAN_EID_HT_CAPABILITY;
2835         *pos++ = sizeof(struct ieee80211_ht_cap);
2836         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2837
2838         /* capability flags */
2839         tmp = cpu_to_le16(cap);
2840         memcpy(pos, &tmp, sizeof(u16));
2841         pos += sizeof(u16);
2842
2843         /* AMPDU parameters */
2844         *pos++ = ht_cap->ampdu_factor |
2845                  (ht_cap->ampdu_density <<
2846                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2847
2848         /* MCS set */
2849         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2850         pos += sizeof(ht_cap->mcs);
2851
2852         /* extended capabilities */
2853         pos += sizeof(__le16);
2854
2855         /* BF capabilities */
2856         pos += sizeof(__le32);
2857
2858         /* antenna selection */
2859         pos += sizeof(u8);
2860
2861         return pos;
2862 }
2863
2864 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2865                                u32 cap)
2866 {
2867         __le32 tmp;
2868
2869         *pos++ = WLAN_EID_VHT_CAPABILITY;
2870         *pos++ = sizeof(struct ieee80211_vht_cap);
2871         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2872
2873         /* capability flags */
2874         tmp = cpu_to_le32(cap);
2875         memcpy(pos, &tmp, sizeof(u32));
2876         pos += sizeof(u32);
2877
2878         /* VHT MCS set */
2879         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2880         pos += sizeof(vht_cap->vht_mcs);
2881
2882         return pos;
2883 }
2884
2885 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2886 {
2887         const struct ieee80211_sta_he_cap *he_cap;
2888         struct ieee80211_supported_band *sband;
2889         u8 n;
2890
2891         sband = ieee80211_get_sband(sdata);
2892         if (!sband)
2893                 return 0;
2894
2895         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2896         if (!he_cap)
2897                 return 0;
2898
2899         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2900         return 2 + 1 +
2901                sizeof(he_cap->he_cap_elem) + n +
2902                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2903                                      he_cap->he_cap_elem.phy_cap_info);
2904 }
2905
2906 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2907                               const struct ieee80211_sta_he_cap *he_cap,
2908                               u8 *end)
2909 {
2910         struct ieee80211_he_cap_elem elem;
2911         u8 n;
2912         u8 ie_len;
2913         u8 *orig_pos = pos;
2914
2915         /* Make sure we have place for the IE */
2916         /*
2917          * TODO: the 1 added is because this temporarily is under the EXTENSION
2918          * IE. Get rid of it when it moves.
2919          */
2920         if (!he_cap)
2921                 return orig_pos;
2922
2923         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2924         elem = he_cap->he_cap_elem;
2925
2926         if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
2927                 elem.phy_cap_info[0] &=
2928                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2929                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2930
2931         if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
2932                 elem.phy_cap_info[0] &=
2933                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
2934
2935         if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
2936                 elem.phy_cap_info[0] &=
2937                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
2938
2939         n = ieee80211_he_mcs_nss_size(&elem);
2940         ie_len = 2 + 1 +
2941                  sizeof(he_cap->he_cap_elem) + n +
2942                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2943                                        he_cap->he_cap_elem.phy_cap_info);
2944
2945         if ((end - pos) < ie_len)
2946                 return orig_pos;
2947
2948         *pos++ = WLAN_EID_EXTENSION;
2949         pos++; /* We'll set the size later below */
2950         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2951
2952         /* Fixed data */
2953         memcpy(pos, &elem, sizeof(elem));
2954         pos += sizeof(elem);
2955
2956         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2957         pos += n;
2958
2959         /* Check if PPE Threshold should be present */
2960         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2961              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2962                 goto end;
2963
2964         /*
2965          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2966          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2967          */
2968         n = hweight8(he_cap->ppe_thres[0] &
2969                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2970         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2971                    IEEE80211_PPE_THRES_NSS_POS));
2972
2973         /*
2974          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2975          * total size.
2976          */
2977         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2978         n = DIV_ROUND_UP(n, 8);
2979
2980         /* Copy PPE Thresholds */
2981         memcpy(pos, &he_cap->ppe_thres, n);
2982         pos += n;
2983
2984 end:
2985         orig_pos[1] = (pos - orig_pos) - 2;
2986         return pos;
2987 }
2988
2989 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2990                                     struct sk_buff *skb)
2991 {
2992         struct ieee80211_supported_band *sband;
2993         const struct ieee80211_sband_iftype_data *iftd;
2994         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2995         u8 *pos;
2996         u16 cap;
2997
2998         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2999                                           BIT(NL80211_BAND_6GHZ),
3000                                           IEEE80211_CHAN_NO_HE))
3001                 return;
3002
3003         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3004
3005         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3006         if (!iftd)
3007                 return;
3008
3009         /* Check for device HE 6 GHz capability before adding element */
3010         if (!iftd->he_6ghz_capa.capa)
3011                 return;
3012
3013         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3014         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3015
3016         switch (sdata->smps_mode) {
3017         case IEEE80211_SMPS_AUTOMATIC:
3018         case IEEE80211_SMPS_NUM_MODES:
3019                 WARN_ON(1);
3020                 fallthrough;
3021         case IEEE80211_SMPS_OFF:
3022                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3023                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3024                 break;
3025         case IEEE80211_SMPS_STATIC:
3026                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3027                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3028                 break;
3029         case IEEE80211_SMPS_DYNAMIC:
3030                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3031                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3032                 break;
3033         }
3034
3035         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3036         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3037                                     pos + 2 + 1 + sizeof(cap));
3038 }
3039
3040 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3041                                const struct cfg80211_chan_def *chandef,
3042                                u16 prot_mode, bool rifs_mode)
3043 {
3044         struct ieee80211_ht_operation *ht_oper;
3045         /* Build HT Information */
3046         *pos++ = WLAN_EID_HT_OPERATION;
3047         *pos++ = sizeof(struct ieee80211_ht_operation);
3048         ht_oper = (struct ieee80211_ht_operation *)pos;
3049         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3050                                         chandef->chan->center_freq);
3051         switch (chandef->width) {
3052         case NL80211_CHAN_WIDTH_160:
3053         case NL80211_CHAN_WIDTH_80P80:
3054         case NL80211_CHAN_WIDTH_80:
3055         case NL80211_CHAN_WIDTH_40:
3056                 if (chandef->center_freq1 > chandef->chan->center_freq)
3057                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3058                 else
3059                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3060                 break;
3061         default:
3062                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3063                 break;
3064         }
3065         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3066             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3067             chandef->width != NL80211_CHAN_WIDTH_20)
3068                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3069
3070         if (rifs_mode)
3071                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3072
3073         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3074         ht_oper->stbc_param = 0x0000;
3075
3076         /* It seems that Basic MCS set and Supported MCS set
3077            are identical for the first 10 bytes */
3078         memset(&ht_oper->basic_set, 0, 16);
3079         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3080
3081         return pos + sizeof(struct ieee80211_ht_operation);
3082 }
3083
3084 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3085                                    const struct cfg80211_chan_def *chandef)
3086 {
3087         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3088         *pos++ = 3;                                     /* IE length */
3089         /* New channel width */
3090         switch (chandef->width) {
3091         case NL80211_CHAN_WIDTH_80:
3092                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3093                 break;
3094         case NL80211_CHAN_WIDTH_160:
3095                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3096                 break;
3097         case NL80211_CHAN_WIDTH_80P80:
3098                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3099                 break;
3100         default:
3101                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3102         }
3103
3104         /* new center frequency segment 0 */
3105         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3106         /* new center frequency segment 1 */
3107         if (chandef->center_freq2)
3108                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3109         else
3110                 *pos++ = 0;
3111 }
3112
3113 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3114                                 const struct cfg80211_chan_def *chandef)
3115 {
3116         struct ieee80211_vht_operation *vht_oper;
3117
3118         *pos++ = WLAN_EID_VHT_OPERATION;
3119         *pos++ = sizeof(struct ieee80211_vht_operation);
3120         vht_oper = (struct ieee80211_vht_operation *)pos;
3121         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3122                                                         chandef->center_freq1);
3123         if (chandef->center_freq2)
3124                 vht_oper->center_freq_seg1_idx =
3125                         ieee80211_frequency_to_channel(chandef->center_freq2);
3126         else
3127                 vht_oper->center_freq_seg1_idx = 0x00;
3128
3129         switch (chandef->width) {
3130         case NL80211_CHAN_WIDTH_160:
3131                 /*
3132                  * Convert 160 MHz channel width to new style as interop
3133                  * workaround.
3134                  */
3135                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3136                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3137                 if (chandef->chan->center_freq < chandef->center_freq1)
3138                         vht_oper->center_freq_seg0_idx -= 8;
3139                 else
3140                         vht_oper->center_freq_seg0_idx += 8;
3141                 break;
3142         case NL80211_CHAN_WIDTH_80P80:
3143                 /*
3144                  * Convert 80+80 MHz channel width to new style as interop
3145                  * workaround.
3146                  */
3147                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3148                 break;
3149         case NL80211_CHAN_WIDTH_80:
3150                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3151                 break;
3152         default:
3153                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3154                 break;
3155         }
3156
3157         /* don't require special VHT peer rates */
3158         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3159
3160         return pos + sizeof(struct ieee80211_vht_operation);
3161 }
3162
3163 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3164 {
3165         struct ieee80211_he_operation *he_oper;
3166         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3167         u32 he_oper_params;
3168         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3169
3170         if (chandef->chan->band == NL80211_BAND_6GHZ)
3171                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3172
3173         *pos++ = WLAN_EID_EXTENSION;
3174         *pos++ = ie_len;
3175         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3176
3177         he_oper_params = 0;
3178         he_oper_params |= u32_encode_bits(1023, /* disabled */
3179                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3180         he_oper_params |= u32_encode_bits(1,
3181                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3182         he_oper_params |= u32_encode_bits(1,
3183                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3184         if (chandef->chan->band == NL80211_BAND_6GHZ)
3185                 he_oper_params |= u32_encode_bits(1,
3186                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3187
3188         he_oper = (struct ieee80211_he_operation *)pos;
3189         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3190
3191         /* don't require special HE peer rates */
3192         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3193         pos += sizeof(struct ieee80211_he_operation);
3194
3195         if (chandef->chan->band != NL80211_BAND_6GHZ)
3196                 goto out;
3197
3198         /* TODO add VHT operational */
3199         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3200         he_6ghz_op->minrate = 6; /* 6 Mbps */
3201         he_6ghz_op->primary =
3202                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3203         he_6ghz_op->ccfs0 =
3204                 ieee80211_frequency_to_channel(chandef->center_freq1);
3205         if (chandef->center_freq2)
3206                 he_6ghz_op->ccfs1 =
3207                         ieee80211_frequency_to_channel(chandef->center_freq2);
3208         else
3209                 he_6ghz_op->ccfs1 = 0;
3210
3211         switch (chandef->width) {
3212         case NL80211_CHAN_WIDTH_160:
3213                 /* Convert 160 MHz channel width to new style as interop
3214                  * workaround.
3215                  */
3216                 he_6ghz_op->control =
3217                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3218                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3219                 if (chandef->chan->center_freq < chandef->center_freq1)
3220                         he_6ghz_op->ccfs0 -= 8;
3221                 else
3222                         he_6ghz_op->ccfs0 += 8;
3223                 fallthrough;
3224         case NL80211_CHAN_WIDTH_80P80:
3225                 he_6ghz_op->control =
3226                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3227                 break;
3228         case NL80211_CHAN_WIDTH_80:
3229                 he_6ghz_op->control =
3230                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3231                 break;
3232         case NL80211_CHAN_WIDTH_40:
3233                 he_6ghz_op->control =
3234                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3235                 break;
3236         default:
3237                 he_6ghz_op->control =
3238                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3239                 break;
3240         }
3241
3242         pos += sizeof(struct ieee80211_he_6ghz_oper);
3243
3244 out:
3245         return pos;
3246 }
3247
3248 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3249                                struct cfg80211_chan_def *chandef)
3250 {
3251         enum nl80211_channel_type channel_type;
3252
3253         if (!ht_oper)
3254                 return false;
3255
3256         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3257         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3258                 channel_type = NL80211_CHAN_HT20;
3259                 break;
3260         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3261                 channel_type = NL80211_CHAN_HT40PLUS;
3262                 break;
3263         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3264                 channel_type = NL80211_CHAN_HT40MINUS;
3265                 break;
3266         default:
3267                 channel_type = NL80211_CHAN_NO_HT;
3268                 return false;
3269         }
3270
3271         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3272         return true;
3273 }
3274
3275 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3276                                 const struct ieee80211_vht_operation *oper,
3277                                 const struct ieee80211_ht_operation *htop,
3278                                 struct cfg80211_chan_def *chandef)
3279 {
3280         struct cfg80211_chan_def new = *chandef;
3281         int cf0, cf1;
3282         int ccfs0, ccfs1, ccfs2;
3283         int ccf0, ccf1;
3284         u32 vht_cap;
3285         bool support_80_80 = false;
3286         bool support_160 = false;
3287         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3288                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3289         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3290                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3291
3292         if (!oper || !htop)
3293                 return false;
3294
3295         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3296         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3297                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3298         support_80_80 = ((vht_cap &
3299                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3300                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3301                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3302                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3303                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3304         ccfs0 = oper->center_freq_seg0_idx;
3305         ccfs1 = oper->center_freq_seg1_idx;
3306         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3307                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3308                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3309
3310         ccf0 = ccfs0;
3311
3312         /* if not supported, parse as though we didn't understand it */
3313         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3314                 ext_nss_bw_supp = 0;
3315
3316         /*
3317          * Cf. IEEE 802.11 Table 9-250
3318          *
3319          * We really just consider that because it's inefficient to connect
3320          * at a higher bandwidth than we'll actually be able to use.
3321          */
3322         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3323         default:
3324         case 0x00:
3325                 ccf1 = 0;
3326                 support_160 = false;
3327                 support_80_80 = false;
3328                 break;
3329         case 0x01:
3330                 support_80_80 = false;
3331                 fallthrough;
3332         case 0x02:
3333         case 0x03:
3334                 ccf1 = ccfs2;
3335                 break;
3336         case 0x10:
3337                 ccf1 = ccfs1;
3338                 break;
3339         case 0x11:
3340         case 0x12:
3341                 if (!ccfs1)
3342                         ccf1 = ccfs2;
3343                 else
3344                         ccf1 = ccfs1;
3345                 break;
3346         case 0x13:
3347         case 0x20:
3348         case 0x23:
3349                 ccf1 = ccfs1;
3350                 break;
3351         }
3352
3353         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3354         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3355
3356         switch (oper->chan_width) {
3357         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3358                 /* just use HT information directly */
3359                 break;
3360         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3361                 new.width = NL80211_CHAN_WIDTH_80;
3362                 new.center_freq1 = cf0;
3363                 /* If needed, adjust based on the newer interop workaround. */
3364                 if (ccf1) {
3365                         unsigned int diff;
3366
3367                         diff = abs(ccf1 - ccf0);
3368                         if ((diff == 8) && support_160) {
3369                                 new.width = NL80211_CHAN_WIDTH_160;
3370                                 new.center_freq1 = cf1;
3371                         } else if ((diff > 8) && support_80_80) {
3372                                 new.width = NL80211_CHAN_WIDTH_80P80;
3373                                 new.center_freq2 = cf1;
3374                         }
3375                 }
3376                 break;
3377         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3378                 /* deprecated encoding */
3379                 new.width = NL80211_CHAN_WIDTH_160;
3380                 new.center_freq1 = cf0;
3381                 break;
3382         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3383                 /* deprecated encoding */
3384                 new.width = NL80211_CHAN_WIDTH_80P80;
3385                 new.center_freq1 = cf0;
3386                 new.center_freq2 = cf1;
3387                 break;
3388         default:
3389                 return false;
3390         }
3391
3392         if (!cfg80211_chandef_valid(&new))
3393                 return false;
3394
3395         *chandef = new;
3396         return true;
3397 }
3398
3399 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3400                                     const struct ieee80211_he_operation *he_oper,
3401                                     struct cfg80211_chan_def *chandef)
3402 {
3403         struct ieee80211_local *local = sdata->local;
3404         struct ieee80211_supported_band *sband;
3405         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3406         const struct ieee80211_sta_he_cap *he_cap;
3407         struct cfg80211_chan_def he_chandef = *chandef;
3408         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3409         bool support_80_80, support_160;
3410         u8 he_phy_cap;
3411         u32 freq;
3412
3413         if (chandef->chan->band != NL80211_BAND_6GHZ)
3414                 return true;
3415
3416         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3417
3418         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3419         if (!he_cap) {
3420                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3421                 return false;
3422         }
3423
3424         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3425         support_160 =
3426                 he_phy_cap &
3427                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3428         support_80_80 =
3429                 he_phy_cap &
3430                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3431
3432         if (!he_oper) {
3433                 sdata_info(sdata,
3434                            "HE is not advertised on (on %d MHz), expect issues\n",
3435                            chandef->chan->center_freq);
3436                 return false;
3437         }
3438
3439         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3440
3441         if (!he_6ghz_oper) {
3442                 sdata_info(sdata,
3443                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3444                            chandef->chan->center_freq);
3445                 return false;
3446         }
3447
3448         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3449                                               NL80211_BAND_6GHZ);
3450         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3451
3452         switch (u8_get_bits(he_6ghz_oper->control,
3453                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3454         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3455                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3456                 break;
3457         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3458                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3459                 break;
3460         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3461                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3462                 break;
3463         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3464                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3465                 if (!he_6ghz_oper->ccfs1)
3466                         break;
3467                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3468                         if (support_160)
3469                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3470                 } else {
3471                         if (support_80_80)
3472                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3473                 }
3474                 break;
3475         }
3476
3477         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3478                 he_chandef.center_freq1 =
3479                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3480                                                        NL80211_BAND_6GHZ);
3481         } else {
3482                 he_chandef.center_freq1 =
3483                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3484                                                        NL80211_BAND_6GHZ);
3485                 if (support_80_80 || support_160)
3486                         he_chandef.center_freq2 =
3487                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3488                                                                NL80211_BAND_6GHZ);
3489         }
3490
3491         if (!cfg80211_chandef_valid(&he_chandef)) {
3492                 sdata_info(sdata,
3493                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3494                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3495                            he_chandef.width,
3496                            he_chandef.center_freq1,
3497                            he_chandef.center_freq2);
3498                 return false;
3499         }
3500
3501         *chandef = he_chandef;
3502
3503         return true;
3504 }
3505
3506 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3507                                 struct cfg80211_chan_def *chandef)
3508 {
3509         u32 oper_freq;
3510
3511         if (!oper)
3512                 return false;
3513
3514         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3515         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3516                 chandef->width = NL80211_CHAN_WIDTH_1;
3517                 break;
3518         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3519                 chandef->width = NL80211_CHAN_WIDTH_2;
3520                 break;
3521         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3522                 chandef->width = NL80211_CHAN_WIDTH_4;
3523                 break;
3524         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3525                 chandef->width = NL80211_CHAN_WIDTH_8;
3526                 break;
3527         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3528                 chandef->width = NL80211_CHAN_WIDTH_16;
3529                 break;
3530         default:
3531                 return false;
3532         }
3533
3534         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3535                                                   NL80211_BAND_S1GHZ);
3536         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3537         chandef->freq1_offset = oper_freq % 1000;
3538
3539         return true;
3540 }
3541
3542 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3543                              const struct ieee80211_supported_band *sband,
3544                              const u8 *srates, int srates_len, u32 *rates)
3545 {
3546         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3547         int shift = ieee80211_chandef_get_shift(chandef);
3548         struct ieee80211_rate *br;
3549         int brate, rate, i, j, count = 0;
3550
3551         *rates = 0;
3552
3553         for (i = 0; i < srates_len; i++) {
3554                 rate = srates[i] & 0x7f;
3555
3556                 for (j = 0; j < sband->n_bitrates; j++) {
3557                         br = &sband->bitrates[j];
3558                         if ((rate_flags & br->flags) != rate_flags)
3559                                 continue;
3560
3561                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3562                         if (brate == rate) {
3563                                 *rates |= BIT(j);
3564                                 count++;
3565                                 break;
3566                         }
3567                 }
3568         }
3569         return count;
3570 }
3571
3572 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3573                             struct sk_buff *skb, bool need_basic,
3574                             enum nl80211_band band)
3575 {
3576         struct ieee80211_local *local = sdata->local;
3577         struct ieee80211_supported_band *sband;
3578         int rate, shift;
3579         u8 i, rates, *pos;
3580         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3581         u32 rate_flags;
3582
3583         shift = ieee80211_vif_get_shift(&sdata->vif);
3584         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3585         sband = local->hw.wiphy->bands[band];
3586         rates = 0;
3587         for (i = 0; i < sband->n_bitrates; i++) {
3588                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3589                         continue;
3590                 rates++;
3591         }
3592         if (rates > 8)
3593                 rates = 8;
3594
3595         if (skb_tailroom(skb) < rates + 2)
3596                 return -ENOMEM;
3597
3598         pos = skb_put(skb, rates + 2);
3599         *pos++ = WLAN_EID_SUPP_RATES;
3600         *pos++ = rates;
3601         for (i = 0; i < rates; i++) {
3602                 u8 basic = 0;
3603                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3604                         continue;
3605
3606                 if (need_basic && basic_rates & BIT(i))
3607                         basic = 0x80;
3608                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3609                                     5 * (1 << shift));
3610                 *pos++ = basic | (u8) rate;
3611         }
3612
3613         return 0;
3614 }
3615
3616 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3617                                 struct sk_buff *skb, bool need_basic,
3618                                 enum nl80211_band band)
3619 {
3620         struct ieee80211_local *local = sdata->local;
3621         struct ieee80211_supported_band *sband;
3622         int rate, shift;
3623         u8 i, exrates, *pos;
3624         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3625         u32 rate_flags;
3626
3627         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3628         shift = ieee80211_vif_get_shift(&sdata->vif);
3629
3630         sband = local->hw.wiphy->bands[band];
3631         exrates = 0;
3632         for (i = 0; i < sband->n_bitrates; i++) {
3633                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3634                         continue;
3635                 exrates++;
3636         }
3637
3638         if (exrates > 8)
3639                 exrates -= 8;
3640         else
3641                 exrates = 0;
3642
3643         if (skb_tailroom(skb) < exrates + 2)
3644                 return -ENOMEM;
3645
3646         if (exrates) {
3647                 pos = skb_put(skb, exrates + 2);
3648                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3649                 *pos++ = exrates;
3650                 for (i = 8; i < sband->n_bitrates; i++) {
3651                         u8 basic = 0;
3652                         if ((rate_flags & sband->bitrates[i].flags)
3653                             != rate_flags)
3654                                 continue;
3655                         if (need_basic && basic_rates & BIT(i))
3656                                 basic = 0x80;
3657                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3658                                             5 * (1 << shift));
3659                         *pos++ = basic | (u8) rate;
3660                 }
3661         }
3662         return 0;
3663 }
3664
3665 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3666 {
3667         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3668         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3669
3670         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3671                 /* non-managed type inferfaces */
3672                 return 0;
3673         }
3674         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3675 }
3676 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3677
3678 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3679 {
3680         if (!mcs)
3681                 return 1;
3682
3683         /* TODO: consider rx_highest */
3684
3685         if (mcs->rx_mask[3])
3686                 return 4;
3687         if (mcs->rx_mask[2])
3688                 return 3;
3689         if (mcs->rx_mask[1])
3690                 return 2;
3691         return 1;
3692 }
3693
3694 /**
3695  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3696  * @local: mac80211 hw info struct
3697  * @status: RX status
3698  * @mpdu_len: total MPDU length (including FCS)
3699  * @mpdu_offset: offset into MPDU to calculate timestamp at
3700  *
3701  * This function calculates the RX timestamp at the given MPDU offset, taking
3702  * into account what the RX timestamp was. An offset of 0 will just normalize
3703  * the timestamp to TSF at beginning of MPDU reception.
3704  */
3705 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3706                                      struct ieee80211_rx_status *status,
3707                                      unsigned int mpdu_len,
3708                                      unsigned int mpdu_offset)
3709 {
3710         u64 ts = status->mactime;
3711         struct rate_info ri;
3712         u16 rate;
3713         u8 n_ltf;
3714
3715         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3716                 return 0;
3717
3718         memset(&ri, 0, sizeof(ri));
3719
3720         ri.bw = status->bw;
3721
3722         /* Fill cfg80211 rate info */
3723         switch (status->encoding) {
3724         case RX_ENC_HE:
3725                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3726                 ri.mcs = status->rate_idx;
3727                 ri.nss = status->nss;
3728                 ri.he_ru_alloc = status->he_ru;
3729                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3730                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3731
3732                 /*
3733                  * See P802.11ax_D6.0, section 27.3.4 for
3734                  * VHT PPDU format.
3735                  */
3736                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3737                         mpdu_offset += 2;
3738                         ts += 36;
3739
3740                         /*
3741                          * TODO:
3742                          * For HE MU PPDU, add the HE-SIG-B.
3743                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3744                          * For HE TB PPDU, add 4us for the HE-STF.
3745                          * Add the HE-LTF durations - variable.
3746                          */
3747                 }
3748
3749                 break;
3750         case RX_ENC_HT:
3751                 ri.mcs = status->rate_idx;
3752                 ri.flags |= RATE_INFO_FLAGS_MCS;
3753                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3754                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3755
3756                 /*
3757                  * See P802.11REVmd_D3.0, section 19.3.2 for
3758                  * HT PPDU format.
3759                  */
3760                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3761                         mpdu_offset += 2;
3762                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3763                                 ts += 24;
3764                         else
3765                                 ts += 32;
3766
3767                         /*
3768                          * Add Data HT-LTFs per streams
3769                          * TODO: add Extension HT-LTFs, 4us per LTF
3770                          */
3771                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3772                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3773                         ts += n_ltf * 4;
3774                 }
3775
3776                 break;
3777         case RX_ENC_VHT:
3778                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3779                 ri.mcs = status->rate_idx;
3780                 ri.nss = status->nss;
3781                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3782                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3783
3784                 /*
3785                  * See P802.11REVmd_D3.0, section 21.3.2 for
3786                  * VHT PPDU format.
3787                  */
3788                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3789                         mpdu_offset += 2;
3790                         ts += 36;
3791
3792                         /*
3793                          * Add VHT-LTFs per streams
3794                          */
3795                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3796                                 ri.nss + 1 : ri.nss;
3797                         ts += 4 * n_ltf;
3798                 }
3799
3800                 break;
3801         default:
3802                 WARN_ON(1);
3803                 fallthrough;
3804         case RX_ENC_LEGACY: {
3805                 struct ieee80211_supported_band *sband;
3806                 int shift = 0;
3807                 int bitrate;
3808
3809                 switch (status->bw) {
3810                 case RATE_INFO_BW_10:
3811                         shift = 1;
3812                         break;
3813                 case RATE_INFO_BW_5:
3814                         shift = 2;
3815                         break;
3816                 }
3817
3818                 sband = local->hw.wiphy->bands[status->band];
3819                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3820                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3821
3822                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3823                         if (status->band == NL80211_BAND_5GHZ) {
3824                                 ts += 20 << shift;
3825                                 mpdu_offset += 2;
3826                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3827                                 ts += 96;
3828                         } else {
3829                                 ts += 192;
3830                         }
3831                 }
3832                 break;
3833                 }
3834         }
3835
3836         rate = cfg80211_calculate_bitrate(&ri);
3837         if (WARN_ONCE(!rate,
3838                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3839                       (unsigned long long)status->flag, status->rate_idx,
3840                       status->nss))
3841                 return 0;
3842
3843         /* rewind from end of MPDU */
3844         if (status->flag & RX_FLAG_MACTIME_END)
3845                 ts -= mpdu_len * 8 * 10 / rate;
3846
3847         ts += mpdu_offset * 8 * 10 / rate;
3848
3849         return ts;
3850 }
3851
3852 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3853 {
3854         struct ieee80211_sub_if_data *sdata;
3855         struct cfg80211_chan_def chandef;
3856
3857         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3858         lockdep_assert_wiphy(local->hw.wiphy);
3859
3860         mutex_lock(&local->mtx);
3861         list_for_each_entry(sdata, &local->interfaces, list) {
3862                 /* it might be waiting for the local->mtx, but then
3863                  * by the time it gets it, sdata->wdev.cac_started
3864                  * will no longer be true
3865                  */
3866                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3867
3868                 if (sdata->wdev.cac_started) {
3869                         chandef = sdata->vif.bss_conf.chandef;
3870                         ieee80211_vif_release_channel(sdata);
3871                         cfg80211_cac_event(sdata->dev,
3872                                            &chandef,
3873                                            NL80211_RADAR_CAC_ABORTED,
3874                                            GFP_KERNEL);
3875                 }
3876         }
3877         mutex_unlock(&local->mtx);
3878 }
3879
3880 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3881 {
3882         struct ieee80211_local *local =
3883                 container_of(work, struct ieee80211_local, radar_detected_work);
3884         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3885         struct ieee80211_chanctx *ctx;
3886         int num_chanctx = 0;
3887
3888         mutex_lock(&local->chanctx_mtx);
3889         list_for_each_entry(ctx, &local->chanctx_list, list) {
3890                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3891                         continue;
3892
3893                 num_chanctx++;
3894                 chandef = ctx->conf.def;
3895         }
3896         mutex_unlock(&local->chanctx_mtx);
3897
3898         wiphy_lock(local->hw.wiphy);
3899         ieee80211_dfs_cac_cancel(local);
3900         wiphy_unlock(local->hw.wiphy);
3901
3902         if (num_chanctx > 1)
3903                 /* XXX: multi-channel is not supported yet */
3904                 WARN_ON(1);
3905         else
3906                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3907 }
3908
3909 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3910 {
3911         struct ieee80211_local *local = hw_to_local(hw);
3912
3913         trace_api_radar_detected(local);
3914
3915         schedule_work(&local->radar_detected_work);
3916 }
3917 EXPORT_SYMBOL(ieee80211_radar_detected);
3918
3919 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3920 {
3921         u32 ret;
3922         int tmp;
3923
3924         switch (c->width) {
3925         case NL80211_CHAN_WIDTH_20:
3926                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3927                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3928                 break;
3929         case NL80211_CHAN_WIDTH_40:
3930                 c->width = NL80211_CHAN_WIDTH_20;
3931                 c->center_freq1 = c->chan->center_freq;
3932                 ret = IEEE80211_STA_DISABLE_40MHZ |
3933                       IEEE80211_STA_DISABLE_VHT;
3934                 break;
3935         case NL80211_CHAN_WIDTH_80:
3936                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3937                 /* n_P40 */
3938                 tmp /= 2;
3939                 /* freq_P40 */
3940                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3941                 c->width = NL80211_CHAN_WIDTH_40;
3942                 ret = IEEE80211_STA_DISABLE_VHT;
3943                 break;
3944         case NL80211_CHAN_WIDTH_80P80:
3945                 c->center_freq2 = 0;
3946                 c->width = NL80211_CHAN_WIDTH_80;
3947                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3948                       IEEE80211_STA_DISABLE_160MHZ;
3949                 break;
3950         case NL80211_CHAN_WIDTH_160:
3951                 /* n_P20 */
3952                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3953                 /* n_P80 */
3954                 tmp /= 4;
3955                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3956                 c->width = NL80211_CHAN_WIDTH_80;
3957                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3958                       IEEE80211_STA_DISABLE_160MHZ;
3959                 break;
3960         default:
3961         case NL80211_CHAN_WIDTH_20_NOHT:
3962                 WARN_ON_ONCE(1);
3963                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3964                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3965                 break;
3966         case NL80211_CHAN_WIDTH_1:
3967         case NL80211_CHAN_WIDTH_2:
3968         case NL80211_CHAN_WIDTH_4:
3969         case NL80211_CHAN_WIDTH_8:
3970         case NL80211_CHAN_WIDTH_16:
3971         case NL80211_CHAN_WIDTH_5:
3972         case NL80211_CHAN_WIDTH_10:
3973                 WARN_ON_ONCE(1);
3974                 /* keep c->width */
3975                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3976                 break;
3977         }
3978
3979         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3980
3981         return ret;
3982 }
3983
3984 /*
3985  * Returns true if smps_mode_new is strictly more restrictive than
3986  * smps_mode_old.
3987  */
3988 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3989                                    enum ieee80211_smps_mode smps_mode_new)
3990 {
3991         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3992                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3993                 return false;
3994
3995         switch (smps_mode_old) {
3996         case IEEE80211_SMPS_STATIC:
3997                 return false;
3998         case IEEE80211_SMPS_DYNAMIC:
3999                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4000         case IEEE80211_SMPS_OFF:
4001                 return smps_mode_new != IEEE80211_SMPS_OFF;
4002         default:
4003                 WARN_ON(1);
4004         }
4005
4006         return false;
4007 }
4008
4009 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4010                               struct cfg80211_csa_settings *csa_settings)
4011 {
4012         struct sk_buff *skb;
4013         struct ieee80211_mgmt *mgmt;
4014         struct ieee80211_local *local = sdata->local;
4015         int freq;
4016         int hdr_len = offsetofend(struct ieee80211_mgmt,
4017                                   u.action.u.chan_switch);
4018         u8 *pos;
4019
4020         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4021             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4022                 return -EOPNOTSUPP;
4023
4024         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4025                             5 + /* channel switch announcement element */
4026                             3 + /* secondary channel offset element */
4027                             5 + /* wide bandwidth channel switch announcement */
4028                             8); /* mesh channel switch parameters element */
4029         if (!skb)
4030                 return -ENOMEM;
4031
4032         skb_reserve(skb, local->tx_headroom);
4033         mgmt = skb_put_zero(skb, hdr_len);
4034         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4035                                           IEEE80211_STYPE_ACTION);
4036
4037         eth_broadcast_addr(mgmt->da);
4038         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4039         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4040                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4041         } else {
4042                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4043                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4044         }
4045         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4046         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4047         pos = skb_put(skb, 5);
4048         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4049         *pos++ = 3;                                             /* IE length */
4050         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4051         freq = csa_settings->chandef.chan->center_freq;
4052         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4053         *pos++ = csa_settings->count;                           /* count */
4054
4055         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4056                 enum nl80211_channel_type ch_type;
4057
4058                 skb_put(skb, 3);
4059                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4060                 *pos++ = 1;                                     /* IE length */
4061                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4062                 if (ch_type == NL80211_CHAN_HT40PLUS)
4063                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4064                 else
4065                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4066         }
4067
4068         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4069                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4070
4071                 skb_put(skb, 8);
4072                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4073                 *pos++ = 6;                                     /* IE length */
4074                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4075                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4076                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4077                 *pos++ |= csa_settings->block_tx ?
4078                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4079                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4080                 pos += 2;
4081                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4082                 pos += 2;
4083         }
4084
4085         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4086             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4087             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4088                 skb_put(skb, 5);
4089                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4090         }
4091
4092         ieee80211_tx_skb(sdata, skb);
4093         return 0;
4094 }
4095
4096 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4097 {
4098         return !(cs == NULL || cs->cipher == 0 ||
4099                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4100                  cs->hdr_len <= cs->key_idx_off ||
4101                  cs->key_idx_shift > 7 ||
4102                  cs->key_idx_mask == 0);
4103 }
4104
4105 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4106 {
4107         int i;
4108
4109         /* Ensure we have enough iftype bitmap space for all iftype values */
4110         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4111
4112         for (i = 0; i < n; i++)
4113                 if (!ieee80211_cs_valid(&cs[i]))
4114                         return false;
4115
4116         return true;
4117 }
4118
4119 const struct ieee80211_cipher_scheme *
4120 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4121                  enum nl80211_iftype iftype)
4122 {
4123         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4124         int n = local->hw.n_cipher_schemes;
4125         int i;
4126         const struct ieee80211_cipher_scheme *cs = NULL;
4127
4128         for (i = 0; i < n; i++) {
4129                 if (l[i].cipher == cipher) {
4130                         cs = &l[i];
4131                         break;
4132                 }
4133         }
4134
4135         if (!cs || !(cs->iftype & BIT(iftype)))
4136                 return NULL;
4137
4138         return cs;
4139 }
4140
4141 int ieee80211_cs_headroom(struct ieee80211_local *local,
4142                           struct cfg80211_crypto_settings *crypto,
4143                           enum nl80211_iftype iftype)
4144 {
4145         const struct ieee80211_cipher_scheme *cs;
4146         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4147         int i;
4148
4149         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4150                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4151                                       iftype);
4152
4153                 if (cs && headroom < cs->hdr_len)
4154                         headroom = cs->hdr_len;
4155         }
4156
4157         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4158         if (cs && headroom < cs->hdr_len)
4159                 headroom = cs->hdr_len;
4160
4161         return headroom;
4162 }
4163
4164 static bool
4165 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4166 {
4167         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4168         int skip;
4169
4170         if (end > 0)
4171                 return false;
4172
4173         /* One shot NOA  */
4174         if (data->count[i] == 1)
4175                 return false;
4176
4177         if (data->desc[i].interval == 0)
4178                 return false;
4179
4180         /* End time is in the past, check for repetitions */
4181         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4182         if (data->count[i] < 255) {
4183                 if (data->count[i] <= skip) {
4184                         data->count[i] = 0;
4185                         return false;
4186                 }
4187
4188                 data->count[i] -= skip;
4189         }
4190
4191         data->desc[i].start += skip * data->desc[i].interval;
4192
4193         return true;
4194 }
4195
4196 static bool
4197 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4198                              s32 *offset)
4199 {
4200         bool ret = false;
4201         int i;
4202
4203         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4204                 s32 cur;
4205
4206                 if (!data->count[i])
4207                         continue;
4208
4209                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4210                         ret = true;
4211
4212                 cur = data->desc[i].start - tsf;
4213                 if (cur > *offset)
4214                         continue;
4215
4216                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4217                 if (cur > *offset)
4218                         *offset = cur;
4219         }
4220
4221         return ret;
4222 }
4223
4224 static u32
4225 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4226 {
4227         s32 offset = 0;
4228         int tries = 0;
4229         /*
4230          * arbitrary limit, used to avoid infinite loops when combined NoA
4231          * descriptors cover the full time period.
4232          */
4233         int max_tries = 5;
4234
4235         ieee80211_extend_absent_time(data, tsf, &offset);
4236         do {
4237                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4238                         break;
4239
4240                 tries++;
4241         } while (tries < max_tries);
4242
4243         return offset;
4244 }
4245
4246 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4247 {
4248         u32 next_offset = BIT(31) - 1;
4249         int i;
4250
4251         data->absent = 0;
4252         data->has_next_tsf = false;
4253         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4254                 s32 start;
4255
4256                 if (!data->count[i])
4257                         continue;
4258
4259                 ieee80211_extend_noa_desc(data, tsf, i);
4260                 start = data->desc[i].start - tsf;
4261                 if (start <= 0)
4262                         data->absent |= BIT(i);
4263
4264                 if (next_offset > start)
4265                         next_offset = start;
4266
4267                 data->has_next_tsf = true;
4268         }
4269
4270         if (data->absent)
4271                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4272
4273         data->next_tsf = tsf + next_offset;
4274 }
4275 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4276
4277 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4278                             struct ieee80211_noa_data *data, u32 tsf)
4279 {
4280         int ret = 0;
4281         int i;
4282
4283         memset(data, 0, sizeof(*data));
4284
4285         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4286                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4287
4288                 if (!desc->count || !desc->duration)
4289                         continue;
4290
4291                 data->count[i] = desc->count;
4292                 data->desc[i].start = le32_to_cpu(desc->start_time);
4293                 data->desc[i].duration = le32_to_cpu(desc->duration);
4294                 data->desc[i].interval = le32_to_cpu(desc->interval);
4295
4296                 if (data->count[i] > 1 &&
4297                     data->desc[i].interval < data->desc[i].duration)
4298                         continue;
4299
4300                 ieee80211_extend_noa_desc(data, tsf, i);
4301                 ret++;
4302         }
4303
4304         if (ret)
4305                 ieee80211_update_p2p_noa(data, tsf);
4306
4307         return ret;
4308 }
4309 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4310
4311 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4312                            struct ieee80211_sub_if_data *sdata)
4313 {
4314         u64 tsf = drv_get_tsf(local, sdata);
4315         u64 dtim_count = 0;
4316         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4317         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4318         struct ps_data *ps;
4319         u8 bcns_from_dtim;
4320
4321         if (tsf == -1ULL || !beacon_int || !dtim_period)
4322                 return;
4323
4324         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4325             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4326                 if (!sdata->bss)
4327                         return;
4328
4329                 ps = &sdata->bss->ps;
4330         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4331                 ps = &sdata->u.mesh.ps;
4332         } else {
4333                 return;
4334         }
4335
4336         /*
4337          * actually finds last dtim_count, mac80211 will update in
4338          * __beacon_add_tim().
4339          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4340          */
4341         do_div(tsf, beacon_int);
4342         bcns_from_dtim = do_div(tsf, dtim_period);
4343         /* just had a DTIM */
4344         if (!bcns_from_dtim)
4345                 dtim_count = 0;
4346         else
4347                 dtim_count = dtim_period - bcns_from_dtim;
4348
4349         ps->dtim_count = dtim_count;
4350 }
4351
4352 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4353                                          struct ieee80211_chanctx *ctx)
4354 {
4355         struct ieee80211_sub_if_data *sdata;
4356         u8 radar_detect = 0;
4357
4358         lockdep_assert_held(&local->chanctx_mtx);
4359
4360         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4361                 return 0;
4362
4363         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4364                 if (sdata->reserved_radar_required)
4365                         radar_detect |= BIT(sdata->reserved_chandef.width);
4366
4367         /*
4368          * An in-place reservation context should not have any assigned vifs
4369          * until it replaces the other context.
4370          */
4371         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4372                 !list_empty(&ctx->assigned_vifs));
4373
4374         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4375                 if (sdata->radar_required)
4376                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4377
4378         return radar_detect;
4379 }
4380
4381 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4382                                  const struct cfg80211_chan_def *chandef,
4383                                  enum ieee80211_chanctx_mode chanmode,
4384                                  u8 radar_detect)
4385 {
4386         struct ieee80211_local *local = sdata->local;
4387         struct ieee80211_sub_if_data *sdata_iter;
4388         enum nl80211_iftype iftype = sdata->wdev.iftype;
4389         struct ieee80211_chanctx *ctx;
4390         int total = 1;
4391         struct iface_combination_params params = {
4392                 .radar_detect = radar_detect,
4393         };
4394
4395         lockdep_assert_held(&local->chanctx_mtx);
4396
4397         if (WARN_ON(hweight32(radar_detect) > 1))
4398                 return -EINVAL;
4399
4400         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4401                     !chandef->chan))
4402                 return -EINVAL;
4403
4404         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4405                 return -EINVAL;
4406
4407         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4408             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4409                 /*
4410                  * always passing this is harmless, since it'll be the
4411                  * same value that cfg80211 finds if it finds the same
4412                  * interface ... and that's always allowed
4413                  */
4414                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4415         }
4416
4417         /* Always allow software iftypes */
4418         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4419                 if (radar_detect)
4420                         return -EINVAL;
4421                 return 0;
4422         }
4423
4424         if (chandef)
4425                 params.num_different_channels = 1;
4426
4427         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4428                 params.iftype_num[iftype] = 1;
4429
4430         list_for_each_entry(ctx, &local->chanctx_list, list) {
4431                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4432                         continue;
4433                 params.radar_detect |=
4434                         ieee80211_chanctx_radar_detect(local, ctx);
4435                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4436                         params.num_different_channels++;
4437                         continue;
4438                 }
4439                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4440                     cfg80211_chandef_compatible(chandef,
4441                                                 &ctx->conf.def))
4442                         continue;
4443                 params.num_different_channels++;
4444         }
4445
4446         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4447                 struct wireless_dev *wdev_iter;
4448
4449                 wdev_iter = &sdata_iter->wdev;
4450
4451                 if (sdata_iter == sdata ||
4452                     !ieee80211_sdata_running(sdata_iter) ||
4453                     cfg80211_iftype_allowed(local->hw.wiphy,
4454                                             wdev_iter->iftype, 0, 1))
4455                         continue;
4456
4457                 params.iftype_num[wdev_iter->iftype]++;
4458                 total++;
4459         }
4460
4461         if (total == 1 && !params.radar_detect)
4462                 return 0;
4463
4464         return cfg80211_check_combinations(local->hw.wiphy, &params);
4465 }
4466
4467 static void
4468 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4469                          void *data)
4470 {
4471         u32 *max_num_different_channels = data;
4472
4473         *max_num_different_channels = max(*max_num_different_channels,
4474                                           c->num_different_channels);
4475 }
4476
4477 int ieee80211_max_num_channels(struct ieee80211_local *local)
4478 {
4479         struct ieee80211_sub_if_data *sdata;
4480         struct ieee80211_chanctx *ctx;
4481         u32 max_num_different_channels = 1;
4482         int err;
4483         struct iface_combination_params params = {0};
4484
4485         lockdep_assert_held(&local->chanctx_mtx);
4486
4487         list_for_each_entry(ctx, &local->chanctx_list, list) {
4488                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4489                         continue;
4490
4491                 params.num_different_channels++;
4492
4493                 params.radar_detect |=
4494                         ieee80211_chanctx_radar_detect(local, ctx);
4495         }
4496
4497         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4498                 params.iftype_num[sdata->wdev.iftype]++;
4499
4500         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4501                                          ieee80211_iter_max_chans,
4502                                          &max_num_different_channels);
4503         if (err < 0)
4504                 return err;
4505
4506         return max_num_different_channels;
4507 }
4508
4509 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4510                                 struct ieee80211_sta_s1g_cap *caps,
4511                                 struct sk_buff *skb)
4512 {
4513         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4514         struct ieee80211_s1g_cap s1g_capab;
4515         u8 *pos;
4516         int i;
4517
4518         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4519                 return;
4520
4521         if (!caps->s1g)
4522                 return;
4523
4524         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4525         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4526
4527         /* override the capability info */
4528         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4529                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4530
4531                 s1g_capab.capab_info[i] &= ~mask;
4532                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4533         }
4534
4535         /* then MCS and NSS set */
4536         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4537                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4538
4539                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4540                 s1g_capab.supp_mcs_nss[i] |=
4541                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4542         }
4543
4544         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4545         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4546         *pos++ = sizeof(s1g_capab);
4547
4548         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4549 }
4550
4551 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4552                                   struct sk_buff *skb)
4553 {
4554         u8 *pos = skb_put(skb, 3);
4555
4556         *pos++ = WLAN_EID_AID_REQUEST;
4557         *pos++ = 1;
4558         *pos++ = 0;
4559 }
4560
4561 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4562 {
4563         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4564         *buf++ = 7; /* len */
4565         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4566         *buf++ = 0x50;
4567         *buf++ = 0xf2;
4568         *buf++ = 2; /* WME */
4569         *buf++ = 0; /* WME info */
4570         *buf++ = 1; /* WME ver */
4571         *buf++ = qosinfo; /* U-APSD no in use */
4572
4573         return buf;
4574 }
4575
4576 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4577                              unsigned long *frame_cnt,
4578                              unsigned long *byte_cnt)
4579 {
4580         struct txq_info *txqi = to_txq_info(txq);
4581         u32 frag_cnt = 0, frag_bytes = 0;
4582         struct sk_buff *skb;
4583
4584         skb_queue_walk(&txqi->frags, skb) {
4585                 frag_cnt++;
4586                 frag_bytes += skb->len;
4587         }
4588
4589         if (frame_cnt)
4590                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4591
4592         if (byte_cnt)
4593                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4594 }
4595 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4596
4597 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4598         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4599         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4600         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4601         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4602 };
4603
4604 u16 ieee80211_encode_usf(int listen_interval)
4605 {
4606         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4607         u16 ui, usf = 0;
4608
4609         /* find greatest USF */
4610         while (usf < IEEE80211_MAX_USF) {
4611                 if (listen_interval % listen_int_usf[usf + 1])
4612                         break;
4613                 usf += 1;
4614         }
4615         ui = listen_interval / listen_int_usf[usf];
4616
4617         /* error if there is a remainder. Should've been checked by user */
4618         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4619         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4620                           FIELD_PREP(LISTEN_INT_UI, ui);
4621
4622         return (u16) listen_interval;
4623 }