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) 2018-2022 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->deflink.operating_11g_mode)
 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->deflink.operating_11g_mode)
 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->deflink.operating_11g_mode)
 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 (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 305                 goto out;
 306
 307         if (sdata->vif.type == NL80211_IFTYPE_AP)
 308                 ps = &sdata->bss->ps;
 309
 310         sdata->vif.txqs_stopped[ac] = false;
 311
 312         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 313                 if (sdata != sta->sdata)
 314                         continue;
 315
 316                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 317                         struct ieee80211_txq *txq = sta->sta.txq[i];
 318
 319                         if (!txq)
 320                                 continue;
 321
 322                         txqi = to_txq_info(txq);
 323
 324                         if (ac != txq->ac)
 325                                 continue;
 326
 327                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 328                                                 &txqi->flags))
 329                                 continue;
 330
 331                         spin_unlock(&fq->lock);
 332                         drv_wake_tx_queue(local, txqi);
 333                         spin_lock(&fq->lock);
 334                 }
 335         }
 336
 337         if (!vif->txq)
 338                 goto out;
 339
 340         txqi = to_txq_info(vif->txq);
 341
 342         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 343             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 344                 goto out;
 345
 346         spin_unlock(&fq->lock);
 347
 348         drv_wake_tx_queue(local, txqi);
 349         local_bh_enable();
 350         return;
 351 out:
 352         spin_unlock(&fq->lock);
 353         local_bh_enable();
 354 }
 355
 356 static void
 357 __releases(&local->queue_stop_reason_lock)
 358 __acquires(&local->queue_stop_reason_lock)
 359 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 360 {
 361         struct ieee80211_sub_if_data *sdata;
 362         int n_acs = IEEE80211_NUM_ACS;
 363         int i;
 364
 365         rcu_read_lock();
 366
 367         if (local->hw.queues < IEEE80211_NUM_ACS)
 368                 n_acs = 1;
 369
 370         for (i = 0; i < local->hw.queues; i++) {
 371                 if (local->queue_stop_reasons[i])
 372                         continue;
 373
 374                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 375                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 376                         int ac;
 377
 378                         for (ac = 0; ac < n_acs; ac++) {
 379                                 int ac_queue = sdata->vif.hw_queue[ac];
 380
 381                                 if (ac_queue == i ||
 382                                     sdata->vif.cab_queue == i)
 383                                         __ieee80211_wake_txqs(sdata, ac);
 384                         }
 385                 }
 386                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 387         }
 388
 389         rcu_read_unlock();
 390 }
 391
 392 void ieee80211_wake_txqs(struct tasklet_struct *t)
 393 {
 394         struct ieee80211_local *local = from_tasklet(local, t,
 395                                                      wake_txqs_tasklet);
 396         unsigned long flags;
 397
 398         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 399         _ieee80211_wake_txqs(local, &flags);
 400         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 401 }
 402
 403 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 404 {
 405         struct ieee80211_sub_if_data *sdata;
 406         int n_acs = IEEE80211_NUM_ACS;
 407
 408         if (local->ops->wake_tx_queue)
 409                 return;
 410
 411         if (local->hw.queues < IEEE80211_NUM_ACS)
 412                 n_acs = 1;
 413
 414         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 415                 int ac;
 416
 417                 if (!sdata->dev)
 418                         continue;
 419
 420                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 421                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 422                         continue;
 423
 424                 for (ac = 0; ac < n_acs; ac++) {
 425                         int ac_queue = sdata->vif.hw_queue[ac];
 426
 427                         if (ac_queue == queue ||
 428                             (sdata->vif.cab_queue == queue &&
 429                              local->queue_stop_reasons[ac_queue] == 0 &&
 430                              skb_queue_empty(&local->pending[ac_queue])))
 431                                 netif_wake_subqueue(sdata->dev, ac);
 432                 }
 433         }
 434 }
 435
 436 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 437                                    enum queue_stop_reason reason,
 438                                    bool refcounted,
 439                                    unsigned long *flags)
 440 {
 441         struct ieee80211_local *local = hw_to_local(hw);
 442
 443         trace_wake_queue(local, queue, reason);
 444
 445         if (WARN_ON(queue >= hw->queues))
 446                 return;
 447
 448         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 449                 return;
 450
 451         if (!refcounted) {
 452                 local->q_stop_reasons[queue][reason] = 0;
 453         } else {
 454                 local->q_stop_reasons[queue][reason]--;
 455                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 456                         local->q_stop_reasons[queue][reason] = 0;
 457         }
 458
 459         if (local->q_stop_reasons[queue][reason] == 0)
 460                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 461
 462         if (local->queue_stop_reasons[queue] != 0)
 463                 /* someone still has this queue stopped */
 464                 return;
 465
 466         if (skb_queue_empty(&local->pending[queue])) {
 467                 rcu_read_lock();
 468                 ieee80211_propagate_queue_wake(local, queue);
 469                 rcu_read_unlock();
 470         } else
 471                 tasklet_schedule(&local->tx_pending_tasklet);
 472
 473         /*
 474          * Calling _ieee80211_wake_txqs here can be a problem because it may
 475          * release queue_stop_reason_lock which has been taken by
 476          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 477          * release someone's lock, but it is fine because all the callers of
 478          * __ieee80211_wake_queue call it right before releasing the lock.
 479          */
 480         if (local->ops->wake_tx_queue) {
 481                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 482                         tasklet_schedule(&local->wake_txqs_tasklet);
 483                 else
 484                         _ieee80211_wake_txqs(local, flags);
 485         }
 486 }
 487
 488 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 489                                     enum queue_stop_reason reason,
 490                                     bool refcounted)
 491 {
 492         struct ieee80211_local *local = hw_to_local(hw);
 493         unsigned long flags;
 494
 495         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 496         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 497         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 498 }
 499
 500 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 501 {
 502         ieee80211_wake_queue_by_reason(hw, queue,
 503                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 504                                        false);
 505 }
 506 EXPORT_SYMBOL(ieee80211_wake_queue);
 507
 508 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 509                                    enum queue_stop_reason reason,
 510                                    bool refcounted)
 511 {
 512         struct ieee80211_local *local = hw_to_local(hw);
 513         struct ieee80211_sub_if_data *sdata;
 514         int n_acs = IEEE80211_NUM_ACS;
 515
 516         trace_stop_queue(local, queue, reason);
 517
 518         if (WARN_ON(queue >= hw->queues))
 519                 return;
 520
 521         if (!refcounted)
 522                 local->q_stop_reasons[queue][reason] = 1;
 523         else
 524                 local->q_stop_reasons[queue][reason]++;
 525
 526         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 527                 return;
 528
 529         if (local->hw.queues < IEEE80211_NUM_ACS)
 530                 n_acs = 1;
 531
 532         rcu_read_lock();
 533         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 534                 int ac;
 535
 536                 if (!sdata->dev)
 537                         continue;
 538
 539                 for (ac = 0; ac < n_acs; ac++) {
 540                         if (sdata->vif.hw_queue[ac] == queue ||
 541                             sdata->vif.cab_queue == queue) {
 542                                 if (!local->ops->wake_tx_queue) {
 543                                         netif_stop_subqueue(sdata->dev, ac);
 544                                         continue;
 545                                 }
 546                                 spin_lock(&local->fq.lock);
 547                                 sdata->vif.txqs_stopped[ac] = true;
 548                                 spin_unlock(&local->fq.lock);
 549                         }
 550                 }
 551         }
 552         rcu_read_unlock();
 553 }
 554
 555 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 556                                     enum queue_stop_reason reason,
 557                                     bool refcounted)
 558 {
 559         struct ieee80211_local *local = hw_to_local(hw);
 560         unsigned long flags;
 561
 562         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 563         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 564         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 565 }
 566
 567 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 568 {
 569         ieee80211_stop_queue_by_reason(hw, queue,
 570                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 571                                        false);
 572 }
 573 EXPORT_SYMBOL(ieee80211_stop_queue);
 574
 575 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 576                                struct sk_buff *skb)
 577 {
 578         struct ieee80211_hw *hw = &local->hw;
 579         unsigned long flags;
 580         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 581         int queue = info->hw_queue;
 582
 583         if (WARN_ON(!info->control.vif)) {
 584                 ieee80211_free_txskb(&local->hw, skb);
 585                 return;
 586         }
 587
 588         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 589         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 590                                false);
 591         __skb_queue_tail(&local->pending[queue], skb);
 592         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 593                                false, &flags);
 594         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 595 }
 596
 597 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 598                                 struct sk_buff_head *skbs)
 599 {
 600         struct ieee80211_hw *hw = &local->hw;
 601         struct sk_buff *skb;
 602         unsigned long flags;
 603         int queue, i;
 604
 605         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 606         while ((skb = skb_dequeue(skbs))) {
 607                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 608
 609                 if (WARN_ON(!info->control.vif)) {
 610                         ieee80211_free_txskb(&local->hw, skb);
 611                         continue;
 612                 }
 613
 614                 queue = info->hw_queue;
 615
 616                 __ieee80211_stop_queue(hw, queue,
 617                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 618                                 false);
 619
 620                 __skb_queue_tail(&local->pending[queue], skb);
 621         }
 622
 623         for (i = 0; i < hw->queues; i++)
 624                 __ieee80211_wake_queue(hw, i,
 625                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 626                         false, &flags);
 627         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 628 }
 629
 630 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 631                                      unsigned long queues,
 632                                      enum queue_stop_reason reason,
 633                                      bool refcounted)
 634 {
 635         struct ieee80211_local *local = hw_to_local(hw);
 636         unsigned long flags;
 637         int i;
 638
 639         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 640
 641         for_each_set_bit(i, &queues, hw->queues)
 642                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 643
 644         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 645 }
 646
 647 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 648 {
 649         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 650                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 651                                         false);
 652 }
 653 EXPORT_SYMBOL(ieee80211_stop_queues);
 654
 655 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 656 {
 657         struct ieee80211_local *local = hw_to_local(hw);
 658         unsigned long flags;
 659         int ret;
 660
 661         if (WARN_ON(queue >= hw->queues))
 662                 return true;
 663
 664         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 665         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 666                        &local->queue_stop_reasons[queue]);
 667         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 668         return ret;
 669 }
 670 EXPORT_SYMBOL(ieee80211_queue_stopped);
 671
 672 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 673                                      unsigned long queues,
 674                                      enum queue_stop_reason reason,
 675                                      bool refcounted)
 676 {
 677         struct ieee80211_local *local = hw_to_local(hw);
 678         unsigned long flags;
 679         int i;
 680
 681         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 682
 683         for_each_set_bit(i, &queues, hw->queues)
 684                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 685
 686         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 687 }
 688
 689 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 690 {
 691         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 692                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 693                                         false);
 694 }
 695 EXPORT_SYMBOL(ieee80211_wake_queues);
 696
 697 static unsigned int
 698 ieee80211_get_vif_queues(struct ieee80211_local *local,
 699                          struct ieee80211_sub_if_data *sdata)
 700 {
 701         unsigned int queues;
 702
 703         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 704                 int ac;
 705
 706                 queues = 0;
 707
 708                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 709                         queues |= BIT(sdata->vif.hw_queue[ac]);
 710                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 711                         queues |= BIT(sdata->vif.cab_queue);
 712         } else {
 713                 /* all queues */
 714                 queues = BIT(local->hw.queues) - 1;
 715         }
 716
 717         return queues;
 718 }
 719
 720 void __ieee80211_flush_queues(struct ieee80211_local *local,
 721                               struct ieee80211_sub_if_data *sdata,
 722                               unsigned int queues, bool drop)
 723 {
 724         if (!local->ops->flush)
 725                 return;
 726
 727         /*
 728          * If no queue was set, or if the HW doesn't support
 729          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 730          */
 731         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 732                 queues = ieee80211_get_vif_queues(local, sdata);
 733
 734         ieee80211_stop_queues_by_reason(&local->hw, queues,
 735                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 736                                         false);
 737
 738         drv_flush(local, sdata, queues, drop);
 739
 740         ieee80211_wake_queues_by_reason(&local->hw, queues,
 741                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 742                                         false);
 743 }
 744
 745 void ieee80211_flush_queues(struct ieee80211_local *local,
 746                             struct ieee80211_sub_if_data *sdata, bool drop)
 747 {
 748         __ieee80211_flush_queues(local, sdata, 0, drop);
 749 }
 750
 751 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 752                                struct ieee80211_sub_if_data *sdata,
 753                                enum queue_stop_reason reason)
 754 {
 755         ieee80211_stop_queues_by_reason(&local->hw,
 756                                         ieee80211_get_vif_queues(local, sdata),
 757                                         reason, true);
 758 }
 759
 760 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 761                                struct ieee80211_sub_if_data *sdata,
 762                                enum queue_stop_reason reason)
 763 {
 764         ieee80211_wake_queues_by_reason(&local->hw,
 765                                         ieee80211_get_vif_queues(local, sdata),
 766                                         reason, true);
 767 }
 768
 769 static void __iterate_interfaces(struct ieee80211_local *local,
 770                                  u32 iter_flags,
 771                                  void (*iterator)(void *data, u8 *mac,
 772                                                   struct ieee80211_vif *vif),
 773                                  void *data)
 774 {
 775         struct ieee80211_sub_if_data *sdata;
 776         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 777
 778         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 779                 switch (sdata->vif.type) {
 780                 case NL80211_IFTYPE_MONITOR:
 781                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 782                                 continue;
 783                         break;
 784                 case NL80211_IFTYPE_AP_VLAN:
 785                         continue;
 786                 default:
 787                         break;
 788                 }
 789                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 790                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 791                         continue;
 792                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 793                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 794                         continue;
 795                 if (ieee80211_sdata_running(sdata) || !active_only)
 796                         iterator(data, sdata->vif.addr,
 797                                  &sdata->vif);
 798         }
 799
 800         sdata = rcu_dereference_check(local->monitor_sdata,
 801                                       lockdep_is_held(&local->iflist_mtx) ||
 802                                       lockdep_is_held(&local->hw.wiphy->mtx));
 803         if (sdata &&
 804             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 805              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 806                 iterator(data, sdata->vif.addr, &sdata->vif);
 807 }
 808
 809 void ieee80211_iterate_interfaces(
 810         struct ieee80211_hw *hw, u32 iter_flags,
 811         void (*iterator)(void *data, u8 *mac,
 812                          struct ieee80211_vif *vif),
 813         void *data)
 814 {
 815         struct ieee80211_local *local = hw_to_local(hw);
 816
 817         mutex_lock(&local->iflist_mtx);
 818         __iterate_interfaces(local, iter_flags, iterator, data);
 819         mutex_unlock(&local->iflist_mtx);
 820 }
 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 822
 823 void ieee80211_iterate_active_interfaces_atomic(
 824         struct ieee80211_hw *hw, u32 iter_flags,
 825         void (*iterator)(void *data, u8 *mac,
 826                          struct ieee80211_vif *vif),
 827         void *data)
 828 {
 829         struct ieee80211_local *local = hw_to_local(hw);
 830
 831         rcu_read_lock();
 832         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 833                              iterator, data);
 834         rcu_read_unlock();
 835 }
 836 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 837
 838 void ieee80211_iterate_active_interfaces_mtx(
 839         struct ieee80211_hw *hw, u32 iter_flags,
 840         void (*iterator)(void *data, u8 *mac,
 841                          struct ieee80211_vif *vif),
 842         void *data)
 843 {
 844         struct ieee80211_local *local = hw_to_local(hw);
 845
 846         lockdep_assert_wiphy(hw->wiphy);
 847
 848         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 849                              iterator, data);
 850 }
 851 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 852
 853 static void __iterate_stations(struct ieee80211_local *local,
 854                                void (*iterator)(void *data,
 855                                                 struct ieee80211_sta *sta),
 856                                void *data)
 857 {
 858         struct sta_info *sta;
 859
 860         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 861                 if (!sta->uploaded)
 862                         continue;
 863
 864                 iterator(data, &sta->sta);
 865         }
 866 }
 867
 868 void ieee80211_iterate_stations(struct ieee80211_hw *hw,
 869                                 void (*iterator)(void *data,
 870                                                  struct ieee80211_sta *sta),
 871                                 void *data)
 872 {
 873         struct ieee80211_local *local = hw_to_local(hw);
 874
 875         mutex_lock(&local->sta_mtx);
 876         __iterate_stations(local, iterator, data);
 877         mutex_unlock(&local->sta_mtx);
 878 }
 879 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations);
 880
 881 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 882                         void (*iterator)(void *data,
 883                                          struct ieee80211_sta *sta),
 884                         void *data)
 885 {
 886         struct ieee80211_local *local = hw_to_local(hw);
 887
 888         rcu_read_lock();
 889         __iterate_stations(local, iterator, data);
 890         rcu_read_unlock();
 891 }
 892 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 893
 894 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 895 {
 896         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 897
 898         if (!ieee80211_sdata_running(sdata) ||
 899             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 900                 return NULL;
 901         return &sdata->vif;
 902 }
 903 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 904
 905 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 906 {
 907         if (!vif)
 908                 return NULL;
 909
 910         return &vif_to_sdata(vif)->wdev;
 911 }
 912 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 913
 914 /*
 915  * Nothing should have been stuffed into the workqueue during
 916  * the suspend->resume cycle. Since we can't check each caller
 917  * of this function if we are already quiescing / suspended,
 918  * check here and don't WARN since this can actually happen when
 919  * the rx path (for example) is racing against __ieee80211_suspend
 920  * and suspending / quiescing was set after the rx path checked
 921  * them.
 922  */
 923 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 924 {
 925         if (local->quiescing || (local->suspended && !local->resuming)) {
 926                 pr_warn("queueing ieee80211 work while going to suspend\n");
 927                 return false;
 928         }
 929
 930         return true;
 931 }
 932
 933 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 934 {
 935         struct ieee80211_local *local = hw_to_local(hw);
 936
 937         if (!ieee80211_can_queue_work(local))
 938                 return;
 939
 940         queue_work(local->workqueue, work);
 941 }
 942 EXPORT_SYMBOL(ieee80211_queue_work);
 943
 944 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 945                                   struct delayed_work *dwork,
 946                                   unsigned long delay)
 947 {
 948         struct ieee80211_local *local = hw_to_local(hw);
 949
 950         if (!ieee80211_can_queue_work(local))
 951                 return;
 952
 953         queue_delayed_work(local->workqueue, dwork, delay);
 954 }
 955 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 956
 957 static void ieee80211_parse_extension_element(u32 *crc,
 958                                               const struct element *elem,
 959                                               struct ieee802_11_elems *elems)
 960 {
 961         const void *data = elem->data + 1;
 962         u8 len;
 963
 964         if (!elem->datalen)
 965                 return;
 966
 967         len = elem->datalen - 1;
 968
 969         switch (elem->data[0]) {
 970         case WLAN_EID_EXT_HE_MU_EDCA:
 971                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 972                         elems->mu_edca_param_set = data;
 973                         if (crc)
 974                                 *crc = crc32_be(*crc, (void *)elem,
 975                                                 elem->datalen + 2);
 976                 }
 977                 break;
 978         case WLAN_EID_EXT_HE_CAPABILITY:
 979                 if (ieee80211_he_capa_size_ok(data, len)) {
 980                         elems->he_cap = data;
 981                         elems->he_cap_len = len;
 982                 }
 983                 break;
 984         case WLAN_EID_EXT_HE_OPERATION:
 985                 if (len >= sizeof(*elems->he_operation) &&
 986                     len >= ieee80211_he_oper_size(data) - 1) {
 987                         if (crc)
 988                                 *crc = crc32_be(*crc, (void *)elem,
 989                                                 elem->datalen + 2);
 990                         elems->he_operation = data;
 991                 }
 992                 break;
 993         case WLAN_EID_EXT_UORA:
 994                 if (len >= 1)
 995                         elems->uora_element = data;
 996                 break;
 997         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 998                 if (len == 3)
 999                         elems->max_channel_switch_time = data;
1000                 break;
1001         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
1002                 if (len >= sizeof(*elems->mbssid_config_ie))
1003                         elems->mbssid_config_ie = data;
1004                 break;
1005         case WLAN_EID_EXT_HE_SPR:
1006                 if (len >= sizeof(*elems->he_spr) &&
1007                     len >= ieee80211_he_spr_size(data))
1008                         elems->he_spr = data;
1009                 break;
1010         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1011                 if (len >= sizeof(*elems->he_6ghz_capa))
1012                         elems->he_6ghz_capa = data;
1013                 break;
1014         case WLAN_EID_EXT_EHT_CAPABILITY:
1015                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
1016                                                data, len)) {
1017                         elems->eht_cap = data;
1018                         elems->eht_cap_len = len;
1019                 }
1020                 break;
1021         case WLAN_EID_EXT_EHT_OPERATION:
1022                 if (ieee80211_eht_oper_size_ok(data, len))
1023                         elems->eht_operation = data;
1024                 break;
1025         case WLAN_EID_EXT_EHT_MULTI_LINK:
1026                 if (ieee80211_mle_size_ok(data, len))
1027                         elems->multi_link = (void *)data;
1028                 break;
1029         }
1030 }
1031
1032 static u32
1033 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
1034                              struct ieee802_11_elems *elems,
1035                              const struct element *check_inherit)
1036 {
1037         const struct element *elem;
1038         bool calc_crc = params->filter != 0;
1039         DECLARE_BITMAP(seen_elems, 256);
1040         u32 crc = params->crc;
1041         const u8 *ie;
1042
1043         bitmap_zero(seen_elems, 256);
1044
1045         for_each_element(elem, params->start, params->len) {
1046                 bool elem_parse_failed;
1047                 u8 id = elem->id;
1048                 u8 elen = elem->datalen;
1049                 const u8 *pos = elem->data;
1050
1051                 if (check_inherit &&
1052                     !cfg80211_is_element_inherited(elem,
1053                                                    check_inherit))
1054                         continue;
1055
1056                 switch (id) {
1057                 case WLAN_EID_SSID:
1058                 case WLAN_EID_SUPP_RATES:
1059                 case WLAN_EID_FH_PARAMS:
1060                 case WLAN_EID_DS_PARAMS:
1061                 case WLAN_EID_CF_PARAMS:
1062                 case WLAN_EID_TIM:
1063                 case WLAN_EID_IBSS_PARAMS:
1064                 case WLAN_EID_CHALLENGE:
1065                 case WLAN_EID_RSN:
1066                 case WLAN_EID_ERP_INFO:
1067                 case WLAN_EID_EXT_SUPP_RATES:
1068                 case WLAN_EID_HT_CAPABILITY:
1069                 case WLAN_EID_HT_OPERATION:
1070                 case WLAN_EID_VHT_CAPABILITY:
1071                 case WLAN_EID_VHT_OPERATION:
1072                 case WLAN_EID_MESH_ID:
1073                 case WLAN_EID_MESH_CONFIG:
1074                 case WLAN_EID_PEER_MGMT:
1075                 case WLAN_EID_PREQ:
1076                 case WLAN_EID_PREP:
1077                 case WLAN_EID_PERR:
1078                 case WLAN_EID_RANN:
1079                 case WLAN_EID_CHANNEL_SWITCH:
1080                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1081                 case WLAN_EID_COUNTRY:
1082                 case WLAN_EID_PWR_CONSTRAINT:
1083                 case WLAN_EID_TIMEOUT_INTERVAL:
1084                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1085                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1086                 case WLAN_EID_CHAN_SWITCH_PARAM:
1087                 case WLAN_EID_EXT_CAPABILITY:
1088                 case WLAN_EID_CHAN_SWITCH_TIMING:
1089                 case WLAN_EID_LINK_ID:
1090                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1091                 case WLAN_EID_RSNX:
1092                 case WLAN_EID_S1G_BCN_COMPAT:
1093                 case WLAN_EID_S1G_CAPABILITIES:
1094                 case WLAN_EID_S1G_OPERATION:
1095                 case WLAN_EID_AID_RESPONSE:
1096                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1097                 /*
1098                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1099                  * that if the content gets bigger it might be needed more than once
1100                  */
1101                         if (test_bit(id, seen_elems)) {
1102                                 elems->parse_error = true;
1103                                 continue;
1104                         }
1105                         break;
1106                 }
1107
1108                 if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1109                         crc = crc32_be(crc, pos - 2, elen + 2);
1110
1111                 elem_parse_failed = false;
1112
1113                 switch (id) {
1114                 case WLAN_EID_LINK_ID:
1115                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1116                                 elem_parse_failed = true;
1117                                 break;
1118                         }
1119                         elems->lnk_id = (void *)(pos - 2);
1120                         break;
1121                 case WLAN_EID_CHAN_SWITCH_TIMING:
1122                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1123                                 elem_parse_failed = true;
1124                                 break;
1125                         }
1126                         elems->ch_sw_timing = (void *)pos;
1127                         break;
1128                 case WLAN_EID_EXT_CAPABILITY:
1129                         elems->ext_capab = pos;
1130                         elems->ext_capab_len = elen;
1131                         break;
1132                 case WLAN_EID_SSID:
1133                         elems->ssid = pos;
1134                         elems->ssid_len = elen;
1135                         break;
1136                 case WLAN_EID_SUPP_RATES:
1137                         elems->supp_rates = pos;
1138                         elems->supp_rates_len = elen;
1139                         break;
1140                 case WLAN_EID_DS_PARAMS:
1141                         if (elen >= 1)
1142                                 elems->ds_params = pos;
1143                         else
1144                                 elem_parse_failed = true;
1145                         break;
1146                 case WLAN_EID_TIM:
1147                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1148                                 elems->tim = (void *)pos;
1149                                 elems->tim_len = elen;
1150                         } else
1151                                 elem_parse_failed = true;
1152                         break;
1153                 case WLAN_EID_VENDOR_SPECIFIC:
1154                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1155                             pos[2] == 0xf2) {
1156                                 /* Microsoft OUI (00:50:F2) */
1157
1158                                 if (calc_crc)
1159                                         crc = crc32_be(crc, pos - 2, elen + 2);
1160
1161                                 if (elen >= 5 && pos[3] == 2) {
1162                                         /* OUI Type 2 - WMM IE */
1163                                         if (pos[4] == 0) {
1164                                                 elems->wmm_info = pos;
1165                                                 elems->wmm_info_len = elen;
1166                                         } else if (pos[4] == 1) {
1167                                                 elems->wmm_param = pos;
1168                                                 elems->wmm_param_len = elen;
1169                                         }
1170                                 }
1171                         }
1172                         break;
1173                 case WLAN_EID_RSN:
1174                         elems->rsn = pos;
1175                         elems->rsn_len = elen;
1176                         break;
1177                 case WLAN_EID_ERP_INFO:
1178                         if (elen >= 1)
1179                                 elems->erp_info = pos;
1180                         else
1181                                 elem_parse_failed = true;
1182                         break;
1183                 case WLAN_EID_EXT_SUPP_RATES:
1184                         elems->ext_supp_rates = pos;
1185                         elems->ext_supp_rates_len = elen;
1186                         break;
1187                 case WLAN_EID_HT_CAPABILITY:
1188                         if (elen >= sizeof(struct ieee80211_ht_cap))
1189                                 elems->ht_cap_elem = (void *)pos;
1190                         else
1191                                 elem_parse_failed = true;
1192                         break;
1193                 case WLAN_EID_HT_OPERATION:
1194                         if (elen >= sizeof(struct ieee80211_ht_operation))
1195                                 elems->ht_operation = (void *)pos;
1196                         else
1197                                 elem_parse_failed = true;
1198                         break;
1199                 case WLAN_EID_VHT_CAPABILITY:
1200                         if (elen >= sizeof(struct ieee80211_vht_cap))
1201                                 elems->vht_cap_elem = (void *)pos;
1202                         else
1203                                 elem_parse_failed = true;
1204                         break;
1205                 case WLAN_EID_VHT_OPERATION:
1206                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1207                                 elems->vht_operation = (void *)pos;
1208                                 if (calc_crc)
1209                                         crc = crc32_be(crc, pos - 2, elen + 2);
1210                                 break;
1211                         }
1212                         elem_parse_failed = true;
1213                         break;
1214                 case WLAN_EID_OPMODE_NOTIF:
1215                         if (elen > 0) {
1216                                 elems->opmode_notif = pos;
1217                                 if (calc_crc)
1218                                         crc = crc32_be(crc, pos - 2, elen + 2);
1219                                 break;
1220                         }
1221                         elem_parse_failed = true;
1222                         break;
1223                 case WLAN_EID_MESH_ID:
1224                         elems->mesh_id = pos;
1225                         elems->mesh_id_len = elen;
1226                         break;
1227                 case WLAN_EID_MESH_CONFIG:
1228                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1229                                 elems->mesh_config = (void *)pos;
1230                         else
1231                                 elem_parse_failed = true;
1232                         break;
1233                 case WLAN_EID_PEER_MGMT:
1234                         elems->peering = pos;
1235                         elems->peering_len = elen;
1236                         break;
1237                 case WLAN_EID_MESH_AWAKE_WINDOW:
1238                         if (elen >= 2)
1239                                 elems->awake_window = (void *)pos;
1240                         break;
1241                 case WLAN_EID_PREQ:
1242                         elems->preq = pos;
1243                         elems->preq_len = elen;
1244                         break;
1245                 case WLAN_EID_PREP:
1246                         elems->prep = pos;
1247                         elems->prep_len = elen;
1248                         break;
1249                 case WLAN_EID_PERR:
1250                         elems->perr = pos;
1251                         elems->perr_len = elen;
1252                         break;
1253                 case WLAN_EID_RANN:
1254                         if (elen >= sizeof(struct ieee80211_rann_ie))
1255                                 elems->rann = (void *)pos;
1256                         else
1257                                 elem_parse_failed = true;
1258                         break;
1259                 case WLAN_EID_CHANNEL_SWITCH:
1260                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1261                                 elem_parse_failed = true;
1262                                 break;
1263                         }
1264                         elems->ch_switch_ie = (void *)pos;
1265                         break;
1266                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1267                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1268                                 elem_parse_failed = true;
1269                                 break;
1270                         }
1271                         elems->ext_chansw_ie = (void *)pos;
1272                         break;
1273                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1274                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1275                                 elem_parse_failed = true;
1276                                 break;
1277                         }
1278                         elems->sec_chan_offs = (void *)pos;
1279                         break;
1280                 case WLAN_EID_CHAN_SWITCH_PARAM:
1281                         if (elen <
1282                             sizeof(*elems->mesh_chansw_params_ie)) {
1283                                 elem_parse_failed = true;
1284                                 break;
1285                         }
1286                         elems->mesh_chansw_params_ie = (void *)pos;
1287                         break;
1288                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1289                         if (!params->action ||
1290                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1291                                 elem_parse_failed = true;
1292                                 break;
1293                         }
1294                         elems->wide_bw_chansw_ie = (void *)pos;
1295                         break;
1296                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1297                         if (params->action) {
1298                                 elem_parse_failed = true;
1299                                 break;
1300                         }
1301                         /*
1302                          * This is a bit tricky, but as we only care about
1303                          * the wide bandwidth channel switch element, so
1304                          * just parse it out manually.
1305                          */
1306                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1307                                               pos, elen);
1308                         if (ie) {
1309                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1310                                         elems->wide_bw_chansw_ie =
1311                                                 (void *)(ie + 2);
1312                                 else
1313                                         elem_parse_failed = true;
1314                         }
1315                         break;
1316                 case WLAN_EID_COUNTRY:
1317                         elems->country_elem = pos;
1318                         elems->country_elem_len = elen;
1319                         break;
1320                 case WLAN_EID_PWR_CONSTRAINT:
1321                         if (elen != 1) {
1322                                 elem_parse_failed = true;
1323                                 break;
1324                         }
1325                         elems->pwr_constr_elem = pos;
1326                         break;
1327                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1328                         /* Lots of different options exist, but we only care
1329                          * about the Dynamic Transmit Power Control element.
1330                          * First check for the Cisco OUI, then for the DTPC
1331                          * tag (0x00).
1332                          */
1333                         if (elen < 4) {
1334                                 elem_parse_failed = true;
1335                                 break;
1336                         }
1337
1338                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1339                             pos[2] != 0x96 || pos[3] != 0x00)
1340                                 break;
1341
1342                         if (elen != 6) {
1343                                 elem_parse_failed = true;
1344                                 break;
1345                         }
1346
1347                         if (calc_crc)
1348                                 crc = crc32_be(crc, pos - 2, elen + 2);
1349
1350                         elems->cisco_dtpc_elem = pos;
1351                         break;
1352                 case WLAN_EID_ADDBA_EXT:
1353                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1354                                 elem_parse_failed = true;
1355                                 break;
1356                         }
1357                         elems->addba_ext_ie = (void *)pos;
1358                         break;
1359                 case WLAN_EID_TIMEOUT_INTERVAL:
1360                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1361                                 elems->timeout_int = (void *)pos;
1362                         else
1363                                 elem_parse_failed = true;
1364                         break;
1365                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1366                         if (elen >= sizeof(*elems->max_idle_period_ie))
1367                                 elems->max_idle_period_ie = (void *)pos;
1368                         break;
1369                 case WLAN_EID_RSNX:
1370                         elems->rsnx = pos;
1371                         elems->rsnx_len = elen;
1372                         break;
1373                 case WLAN_EID_TX_POWER_ENVELOPE:
1374                         if (elen < 1 ||
1375                             elen > sizeof(struct ieee80211_tx_pwr_env))
1376                                 break;
1377
1378                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1379                                 break;
1380
1381                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1382                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1383                         elems->tx_pwr_env_num++;
1384                         break;
1385                 case WLAN_EID_EXTENSION:
1386                         ieee80211_parse_extension_element(calc_crc ?
1387                                                                 &crc : NULL,
1388                                                           elem, elems);
1389                         break;
1390                 case WLAN_EID_S1G_CAPABILITIES:
1391                         if (elen >= sizeof(*elems->s1g_capab))
1392                                 elems->s1g_capab = (void *)pos;
1393                         else
1394                                 elem_parse_failed = true;
1395                         break;
1396                 case WLAN_EID_S1G_OPERATION:
1397                         if (elen == sizeof(*elems->s1g_oper))
1398                                 elems->s1g_oper = (void *)pos;
1399                         else
1400                                 elem_parse_failed = true;
1401                         break;
1402                 case WLAN_EID_S1G_BCN_COMPAT:
1403                         if (elen == sizeof(*elems->s1g_bcn_compat))
1404                                 elems->s1g_bcn_compat = (void *)pos;
1405                         else
1406                                 elem_parse_failed = true;
1407                         break;
1408                 case WLAN_EID_AID_RESPONSE:
1409                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1410                                 elems->aid_resp = (void *)pos;
1411                         else
1412                                 elem_parse_failed = true;
1413                         break;
1414                 default:
1415                         break;
1416                 }
1417
1418                 if (elem_parse_failed)
1419                         elems->parse_error = true;
1420                 else
1421                         __set_bit(id, seen_elems);
1422         }
1423
1424         if (!for_each_element_completed(elem, params->start, params->len))
1425                 elems->parse_error = true;
1426
1427         return crc;
1428 }
1429
1430 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1431                                             struct ieee802_11_elems *elems,
1432                                             struct cfg80211_bss *bss,
1433                                             u8 *nontransmitted_profile)
1434 {
1435         const struct element *elem, *sub;
1436         size_t profile_len = 0;
1437         bool found = false;
1438
1439         if (!bss || !bss->transmitted_bss)
1440                 return profile_len;
1441
1442         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1443                 if (elem->datalen < 2)
1444                         continue;
1445
1446                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1447                         u8 new_bssid[ETH_ALEN];
1448                         const u8 *index;
1449
1450                         if (sub->id != 0 || sub->datalen < 4) {
1451                                 /* not a valid BSS profile */
1452                                 continue;
1453                         }
1454
1455                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1456                             sub->data[1] != 2) {
1457                                 /* The first element of the
1458                                  * Nontransmitted BSSID Profile is not
1459                                  * the Nontransmitted BSSID Capability
1460                                  * element.
1461                                  */
1462                                 continue;
1463                         }
1464
1465                         memset(nontransmitted_profile, 0, len);
1466                         profile_len = cfg80211_merge_profile(start, len,
1467                                                              elem,
1468                                                              sub,
1469                                                              nontransmitted_profile,
1470                                                              len);
1471
1472                         /* found a Nontransmitted BSSID Profile */
1473                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1474                                                  nontransmitted_profile,
1475                                                  profile_len);
1476                         if (!index || index[1] < 1 || index[2] == 0) {
1477                                 /* Invalid MBSSID Index element */
1478                                 continue;
1479                         }
1480
1481                         cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1482                                                elem->data[0],
1483                                                index[2],
1484                                                new_bssid);
1485                         if (ether_addr_equal(new_bssid, bss->bssid)) {
1486                                 found = true;
1487                                 elems->bssid_index_len = index[1];
1488                                 elems->bssid_index = (void *)&index[2];
1489                                 break;
1490                         }
1491                 }
1492         }
1493
1494         return found ? profile_len : 0;
1495 }
1496
1497 struct ieee802_11_elems *
1498 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1499 {
1500         struct ieee802_11_elems *elems;
1501         const struct element *non_inherit = NULL;
1502         u8 *nontransmitted_profile;
1503         int nontransmitted_profile_len = 0;
1504
1505         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1506         if (!elems)
1507                 return NULL;
1508         elems->ie_start = params->start;
1509         elems->total_len = params->len;
1510
1511         nontransmitted_profile = kmalloc(params->len, GFP_ATOMIC);
1512         if (nontransmitted_profile) {
1513                 nontransmitted_profile_len =
1514                         ieee802_11_find_bssid_profile(params->start, params->len,
1515                                                       elems, params->bss,
1516                                                       nontransmitted_profile);
1517                 non_inherit =
1518                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1519                                                nontransmitted_profile,
1520                                                nontransmitted_profile_len);
1521         }
1522
1523         elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1524
1525         /* Override with nontransmitted profile, if found */
1526         if (nontransmitted_profile_len) {
1527                 struct ieee80211_elems_parse_params sub = {
1528                         .start = nontransmitted_profile,
1529                         .len = nontransmitted_profile_len,
1530                         .action = params->action,
1531                         .link_id = params->link_id,
1532                 };
1533
1534                 _ieee802_11_parse_elems_full(&sub, elems, NULL);
1535         }
1536
1537         if (elems->tim && !elems->parse_error) {
1538                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1539
1540                 elems->dtim_period = tim_ie->dtim_period;
1541                 elems->dtim_count = tim_ie->dtim_count;
1542         }
1543
1544         /* Override DTIM period and count if needed */
1545         if (elems->bssid_index &&
1546             elems->bssid_index_len >=
1547             offsetofend(struct ieee80211_bssid_index, dtim_period))
1548                 elems->dtim_period = elems->bssid_index->dtim_period;
1549
1550         if (elems->bssid_index &&
1551             elems->bssid_index_len >=
1552             offsetofend(struct ieee80211_bssid_index, dtim_count))
1553                 elems->dtim_count = elems->bssid_index->dtim_count;
1554
1555         kfree(nontransmitted_profile);
1556
1557         return elems;
1558 }
1559
1560 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1561                                            struct ieee80211_tx_queue_params
1562                                            *qparam, int ac)
1563 {
1564         struct ieee80211_chanctx_conf *chanctx_conf;
1565         const struct ieee80211_reg_rule *rrule;
1566         const struct ieee80211_wmm_ac *wmm_ac;
1567         u16 center_freq = 0;
1568
1569         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1570             sdata->vif.type != NL80211_IFTYPE_STATION)
1571                 return;
1572
1573         rcu_read_lock();
1574         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1575         if (chanctx_conf)
1576                 center_freq = chanctx_conf->def.chan->center_freq;
1577
1578         if (!center_freq) {
1579                 rcu_read_unlock();
1580                 return;
1581         }
1582
1583         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1584
1585         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1586                 rcu_read_unlock();
1587                 return;
1588         }
1589
1590         if (sdata->vif.type == NL80211_IFTYPE_AP)
1591                 wmm_ac = &rrule->wmm_rule.ap[ac];
1592         else
1593                 wmm_ac = &rrule->wmm_rule.client[ac];
1594         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1595         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1596         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1597         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1598         rcu_read_unlock();
1599 }
1600
1601 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1602                                bool bss_notify, bool enable_qos)
1603 {
1604         struct ieee80211_sub_if_data *sdata = link->sdata;
1605         struct ieee80211_local *local = sdata->local;
1606         struct ieee80211_tx_queue_params qparam;
1607         struct ieee80211_chanctx_conf *chanctx_conf;
1608         int ac;
1609         bool use_11b;
1610         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1611         int aCWmin, aCWmax;
1612
1613         if (!local->ops->conf_tx)
1614                 return;
1615
1616         if (local->hw.queues < IEEE80211_NUM_ACS)
1617                 return;
1618
1619         memset(&qparam, 0, sizeof(qparam));
1620
1621         rcu_read_lock();
1622         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1623         use_11b = (chanctx_conf &&
1624                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1625                  !link->operating_11g_mode;
1626         rcu_read_unlock();
1627
1628         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1629
1630         /* Set defaults according to 802.11-2007 Table 7-37 */
1631         aCWmax = 1023;
1632         if (use_11b)
1633                 aCWmin = 31;
1634         else
1635                 aCWmin = 15;
1636
1637         /* Confiure old 802.11b/g medium access rules. */
1638         qparam.cw_max = aCWmax;
1639         qparam.cw_min = aCWmin;
1640         qparam.txop = 0;
1641         qparam.aifs = 2;
1642
1643         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1644                 /* Update if QoS is enabled. */
1645                 if (enable_qos) {
1646                         switch (ac) {
1647                         case IEEE80211_AC_BK:
1648                                 qparam.cw_max = aCWmax;
1649                                 qparam.cw_min = aCWmin;
1650                                 qparam.txop = 0;
1651                                 if (is_ocb)
1652                                         qparam.aifs = 9;
1653                                 else
1654                                         qparam.aifs = 7;
1655                                 break;
1656                         /* never happens but let's not leave undefined */
1657                         default:
1658                         case IEEE80211_AC_BE:
1659                                 qparam.cw_max = aCWmax;
1660                                 qparam.cw_min = aCWmin;
1661                                 qparam.txop = 0;
1662                                 if (is_ocb)
1663                                         qparam.aifs = 6;
1664                                 else
1665                                         qparam.aifs = 3;
1666                                 break;
1667                         case IEEE80211_AC_VI:
1668                                 qparam.cw_max = aCWmin;
1669                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1670                                 if (is_ocb)
1671                                         qparam.txop = 0;
1672                                 else if (use_11b)
1673                                         qparam.txop = 6016/32;
1674                                 else
1675                                         qparam.txop = 3008/32;
1676
1677                                 if (is_ocb)
1678                                         qparam.aifs = 3;
1679                                 else
1680                                         qparam.aifs = 2;
1681                                 break;
1682                         case IEEE80211_AC_VO:
1683                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1684                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1685                                 if (is_ocb)
1686                                         qparam.txop = 0;
1687                                 else if (use_11b)
1688                                         qparam.txop = 3264/32;
1689                                 else
1690                                         qparam.txop = 1504/32;
1691                                 qparam.aifs = 2;
1692                                 break;
1693                         }
1694                 }
1695                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1696
1697                 qparam.uapsd = false;
1698
1699                 link->tx_conf[ac] = qparam;
1700                 drv_conf_tx(local, link, ac, &qparam);
1701         }
1702
1703         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1704             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1705             sdata->vif.type != NL80211_IFTYPE_NAN) {
1706                 link->conf->qos = enable_qos;
1707                 if (bss_notify)
1708                         ieee80211_link_info_change_notify(sdata, link,
1709                                                           BSS_CHANGED_QOS);
1710         }
1711 }
1712
1713 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1714                          u16 transaction, u16 auth_alg, u16 status,
1715                          const u8 *extra, size_t extra_len, const u8 *da,
1716                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1717                          u32 tx_flags)
1718 {
1719         struct ieee80211_local *local = sdata->local;
1720         struct sk_buff *skb;
1721         struct ieee80211_mgmt *mgmt;
1722         bool multi_link = sdata->vif.valid_links;
1723         struct {
1724                 u8 id;
1725                 u8 len;
1726                 u8 ext_id;
1727                 struct ieee80211_multi_link_elem ml;
1728                 struct ieee80211_mle_basic_common_info basic;
1729         } __packed mle = {
1730                 .id = WLAN_EID_EXTENSION,
1731                 .len = sizeof(mle) - 2,
1732                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1733                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1734                 .basic.len = sizeof(mle.basic),
1735         };
1736         int err;
1737
1738         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1739
1740         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1741         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1742                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1743                             multi_link * sizeof(mle));
1744         if (!skb)
1745                 return;
1746
1747         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1748
1749         mgmt = skb_put_zero(skb, 24 + 6);
1750         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1751                                           IEEE80211_STYPE_AUTH);
1752         memcpy(mgmt->da, da, ETH_ALEN);
1753         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1754         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1755         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1756         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1757         mgmt->u.auth.status_code = cpu_to_le16(status);
1758         if (extra)
1759                 skb_put_data(skb, extra, extra_len);
1760         if (multi_link)
1761                 skb_put_data(skb, &mle, sizeof(mle));
1762
1763         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1764                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1765                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1766                 if (WARN_ON(err)) {
1767                         kfree_skb(skb);
1768                         return;
1769                 }
1770         }
1771
1772         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1773                                         tx_flags;
1774         ieee80211_tx_skb(sdata, skb);
1775 }
1776
1777 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1778                                     const u8 *da, const u8 *bssid,
1779                                     u16 stype, u16 reason,
1780                                     bool send_frame, u8 *frame_buf)
1781 {
1782         struct ieee80211_local *local = sdata->local;
1783         struct sk_buff *skb;
1784         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1785
1786         /* build frame */
1787         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1788         mgmt->duration = 0; /* initialize only */
1789         mgmt->seq_ctrl = 0; /* initialize only */
1790         memcpy(mgmt->da, da, ETH_ALEN);
1791         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1792         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1793         /* u.deauth.reason_code == u.disassoc.reason_code */
1794         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1795
1796         if (send_frame) {
1797                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1798                                     IEEE80211_DEAUTH_FRAME_LEN);
1799                 if (!skb)
1800                         return;
1801
1802                 skb_reserve(skb, local->hw.extra_tx_headroom);
1803
1804                 /* copy in frame */
1805                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1806
1807                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1808                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1809                         IEEE80211_SKB_CB(skb)->flags |=
1810                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1811
1812                 ieee80211_tx_skb(sdata, skb);
1813         }
1814 }
1815
1816 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1817 {
1818         if ((end - pos) < 5)
1819                 return pos;
1820
1821         *pos++ = WLAN_EID_EXTENSION;
1822         *pos++ = 1 + sizeof(cap);
1823         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1824         memcpy(pos, &cap, sizeof(cap));
1825
1826         return pos + 2;
1827 }
1828
1829 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1830                                          u8 *buffer, size_t buffer_len,
1831                                          const u8 *ie, size_t ie_len,
1832                                          enum nl80211_band band,
1833                                          u32 rate_mask,
1834                                          struct cfg80211_chan_def *chandef,
1835                                          size_t *offset, u32 flags)
1836 {
1837         struct ieee80211_local *local = sdata->local;
1838         struct ieee80211_supported_band *sband;
1839         const struct ieee80211_sta_he_cap *he_cap;
1840         const struct ieee80211_sta_eht_cap *eht_cap;
1841         u8 *pos = buffer, *end = buffer + buffer_len;
1842         size_t noffset;
1843         int supp_rates_len, i;
1844         u8 rates[32];
1845         int num_rates;
1846         int ext_rates_len;
1847         int shift;
1848         u32 rate_flags;
1849         bool have_80mhz = false;
1850
1851         *offset = 0;
1852
1853         sband = local->hw.wiphy->bands[band];
1854         if (WARN_ON_ONCE(!sband))
1855                 return 0;
1856
1857         rate_flags = ieee80211_chandef_rate_flags(chandef);
1858         shift = ieee80211_chandef_get_shift(chandef);
1859
1860         num_rates = 0;
1861         for (i = 0; i < sband->n_bitrates; i++) {
1862                 if ((BIT(i) & rate_mask) == 0)
1863                         continue; /* skip rate */
1864                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1865                         continue;
1866
1867                 rates[num_rates++] =
1868                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1869                                           (1 << shift) * 5);
1870         }
1871
1872         supp_rates_len = min_t(int, num_rates, 8);
1873
1874         if (end - pos < 2 + supp_rates_len)
1875                 goto out_err;
1876         *pos++ = WLAN_EID_SUPP_RATES;
1877         *pos++ = supp_rates_len;
1878         memcpy(pos, rates, supp_rates_len);
1879         pos += supp_rates_len;
1880
1881         /* insert "request information" if in custom IEs */
1882         if (ie && ie_len) {
1883                 static const u8 before_extrates[] = {
1884                         WLAN_EID_SSID,
1885                         WLAN_EID_SUPP_RATES,
1886                         WLAN_EID_REQUEST,
1887                 };
1888                 noffset = ieee80211_ie_split(ie, ie_len,
1889                                              before_extrates,
1890                                              ARRAY_SIZE(before_extrates),
1891                                              *offset);
1892                 if (end - pos < noffset - *offset)
1893                         goto out_err;
1894                 memcpy(pos, ie + *offset, noffset - *offset);
1895                 pos += noffset - *offset;
1896                 *offset = noffset;
1897         }
1898
1899         ext_rates_len = num_rates - supp_rates_len;
1900         if (ext_rates_len > 0) {
1901                 if (end - pos < 2 + ext_rates_len)
1902                         goto out_err;
1903                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1904                 *pos++ = ext_rates_len;
1905                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1906                 pos += ext_rates_len;
1907         }
1908
1909         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1910                 if (end - pos < 3)
1911                         goto out_err;
1912                 *pos++ = WLAN_EID_DS_PARAMS;
1913                 *pos++ = 1;
1914                 *pos++ = ieee80211_frequency_to_channel(
1915                                 chandef->chan->center_freq);
1916         }
1917
1918         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1919                 goto done;
1920
1921         /* insert custom IEs that go before HT */
1922         if (ie && ie_len) {
1923                 static const u8 before_ht[] = {
1924                         /*
1925                          * no need to list the ones split off already
1926                          * (or generated here)
1927                          */
1928                         WLAN_EID_DS_PARAMS,
1929                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1930                 };
1931                 noffset = ieee80211_ie_split(ie, ie_len,
1932                                              before_ht, ARRAY_SIZE(before_ht),
1933                                              *offset);
1934                 if (end - pos < noffset - *offset)
1935                         goto out_err;
1936                 memcpy(pos, ie + *offset, noffset - *offset);
1937                 pos += noffset - *offset;
1938                 *offset = noffset;
1939         }
1940
1941         if (sband->ht_cap.ht_supported) {
1942                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1943                         goto out_err;
1944                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1945                                                 sband->ht_cap.cap);
1946         }
1947
1948         /* insert custom IEs that go before VHT */
1949         if (ie && ie_len) {
1950                 static const u8 before_vht[] = {
1951                         /*
1952                          * no need to list the ones split off already
1953                          * (or generated here)
1954                          */
1955                         WLAN_EID_BSS_COEX_2040,
1956                         WLAN_EID_EXT_CAPABILITY,
1957                         WLAN_EID_SSID_LIST,
1958                         WLAN_EID_CHANNEL_USAGE,
1959                         WLAN_EID_INTERWORKING,
1960                         WLAN_EID_MESH_ID,
1961                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1962                 };
1963                 noffset = ieee80211_ie_split(ie, ie_len,
1964                                              before_vht, ARRAY_SIZE(before_vht),
1965                                              *offset);
1966                 if (end - pos < noffset - *offset)
1967                         goto out_err;
1968                 memcpy(pos, ie + *offset, noffset - *offset);
1969                 pos += noffset - *offset;
1970                 *offset = noffset;
1971         }
1972
1973         /* Check if any channel in this sband supports at least 80 MHz */
1974         for (i = 0; i < sband->n_channels; i++) {
1975                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1976                                                 IEEE80211_CHAN_NO_80MHZ))
1977                         continue;
1978
1979                 have_80mhz = true;
1980                 break;
1981         }
1982
1983         if (sband->vht_cap.vht_supported && have_80mhz) {
1984                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1985                         goto out_err;
1986                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1987                                                  sband->vht_cap.cap);
1988         }
1989
1990         /* insert custom IEs that go before HE */
1991         if (ie && ie_len) {
1992                 static const u8 before_he[] = {
1993                         /*
1994                          * no need to list the ones split off before VHT
1995                          * or generated here
1996                          */
1997                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1998                         WLAN_EID_AP_CSN,
1999                         /* TODO: add 11ah/11aj/11ak elements */
2000                 };
2001                 noffset = ieee80211_ie_split(ie, ie_len,
2002                                              before_he, ARRAY_SIZE(before_he),
2003                                              *offset);
2004                 if (end - pos < noffset - *offset)
2005                         goto out_err;
2006                 memcpy(pos, ie + *offset, noffset - *offset);
2007                 pos += noffset - *offset;
2008                 *offset = noffset;
2009         }
2010
2011         he_cap = ieee80211_get_he_iftype_cap(sband,
2012                                              ieee80211_vif_type_p2p(&sdata->vif));
2013         if (he_cap &&
2014             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2015                                          IEEE80211_CHAN_NO_HE)) {
2016                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2017                 if (!pos)
2018                         goto out_err;
2019         }
2020
2021         eht_cap = ieee80211_get_eht_iftype_cap(sband,
2022                                                ieee80211_vif_type_p2p(&sdata->vif));
2023
2024         if (eht_cap &&
2025             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2026                                          IEEE80211_CHAN_NO_HE |
2027                                          IEEE80211_CHAN_NO_EHT)) {
2028                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end);
2029                 if (!pos)
2030                         goto out_err;
2031         }
2032
2033         if (cfg80211_any_usable_channels(local->hw.wiphy,
2034                                          BIT(NL80211_BAND_6GHZ),
2035                                          IEEE80211_CHAN_NO_HE)) {
2036                 struct ieee80211_supported_band *sband6;
2037
2038                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2039                 he_cap = ieee80211_get_he_iftype_cap(sband6,
2040                                 ieee80211_vif_type_p2p(&sdata->vif));
2041
2042                 if (he_cap) {
2043                         enum nl80211_iftype iftype =
2044                                 ieee80211_vif_type_p2p(&sdata->vif);
2045                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
2046
2047                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2048                 }
2049         }
2050
2051         /*
2052          * If adding more here, adjust code in main.c
2053          * that calculates local->scan_ies_len.
2054          */
2055
2056         return pos - buffer;
2057  out_err:
2058         WARN_ONCE(1, "not enough space for preq IEs\n");
2059  done:
2060         return pos - buffer;
2061 }
2062
2063 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2064                              size_t buffer_len,
2065                              struct ieee80211_scan_ies *ie_desc,
2066                              const u8 *ie, size_t ie_len,
2067                              u8 bands_used, u32 *rate_masks,
2068                              struct cfg80211_chan_def *chandef,
2069                              u32 flags)
2070 {
2071         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2072         int i;
2073
2074         memset(ie_desc, 0, sizeof(*ie_desc));
2075
2076         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2077                 if (bands_used & BIT(i)) {
2078                         pos += ieee80211_build_preq_ies_band(sdata,
2079                                                              buffer + pos,
2080                                                              buffer_len - pos,
2081                                                              ie, ie_len, i,
2082                                                              rate_masks[i],
2083                                                              chandef,
2084                                                              &custom_ie_offset,
2085                                                              flags);
2086                         ie_desc->ies[i] = buffer + old_pos;
2087                         ie_desc->len[i] = pos - old_pos;
2088                         old_pos = pos;
2089                 }
2090         }
2091
2092         /* add any remaining custom IEs */
2093         if (ie && ie_len) {
2094                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2095                               "not enough space for preq custom IEs\n"))
2096                         return pos;
2097                 memcpy(buffer + pos, ie + custom_ie_offset,
2098                        ie_len - custom_ie_offset);
2099                 ie_desc->common_ies = buffer + pos;
2100                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2101                 pos += ie_len - custom_ie_offset;
2102         }
2103
2104         return pos;
2105 };
2106
2107 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2108                                           const u8 *src, const u8 *dst,
2109                                           u32 ratemask,
2110                                           struct ieee80211_channel *chan,
2111                                           const u8 *ssid, size_t ssid_len,
2112                                           const u8 *ie, size_t ie_len,
2113                                           u32 flags)
2114 {
2115         struct ieee80211_local *local = sdata->local;
2116         struct cfg80211_chan_def chandef;
2117         struct sk_buff *skb;
2118         struct ieee80211_mgmt *mgmt;
2119         int ies_len;
2120         u32 rate_masks[NUM_NL80211_BANDS] = {};
2121         struct ieee80211_scan_ies dummy_ie_desc;
2122
2123         /*
2124          * Do not send DS Channel parameter for directed probe requests
2125          * in order to maximize the chance that we get a response.  Some
2126          * badly-behaved APs don't respond when this parameter is included.
2127          */
2128         chandef.width = sdata->vif.bss_conf.chandef.width;
2129         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2130                 chandef.chan = NULL;
2131         else
2132                 chandef.chan = chan;
2133
2134         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2135                                      local->scan_ies_len + ie_len);
2136         if (!skb)
2137                 return NULL;
2138
2139         rate_masks[chan->band] = ratemask;
2140         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2141                                            skb_tailroom(skb), &dummy_ie_desc,
2142                                            ie, ie_len, BIT(chan->band),
2143                                            rate_masks, &chandef, flags);
2144         skb_put(skb, ies_len);
2145
2146         if (dst) {
2147                 mgmt = (struct ieee80211_mgmt *) skb->data;
2148                 memcpy(mgmt->da, dst, ETH_ALEN);
2149                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2150         }
2151
2152         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2153
2154         return skb;
2155 }
2156
2157 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2158                             struct ieee802_11_elems *elems,
2159                             enum nl80211_band band, u32 *basic_rates)
2160 {
2161         struct ieee80211_supported_band *sband;
2162         size_t num_rates;
2163         u32 supp_rates, rate_flags;
2164         int i, j, shift;
2165
2166         sband = sdata->local->hw.wiphy->bands[band];
2167         if (WARN_ON(!sband))
2168                 return 1;
2169
2170         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2171         shift = ieee80211_vif_get_shift(&sdata->vif);
2172
2173         num_rates = sband->n_bitrates;
2174         supp_rates = 0;
2175         for (i = 0; i < elems->supp_rates_len +
2176                      elems->ext_supp_rates_len; i++) {
2177                 u8 rate = 0;
2178                 int own_rate;
2179                 bool is_basic;
2180                 if (i < elems->supp_rates_len)
2181                         rate = elems->supp_rates[i];
2182                 else if (elems->ext_supp_rates)
2183                         rate = elems->ext_supp_rates
2184                                 [i - elems->supp_rates_len];
2185                 own_rate = 5 * (rate & 0x7f);
2186                 is_basic = !!(rate & 0x80);
2187
2188                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2189                         continue;
2190
2191                 for (j = 0; j < num_rates; j++) {
2192                         int brate;
2193                         if ((rate_flags & sband->bitrates[j].flags)
2194                             != rate_flags)
2195                                 continue;
2196
2197                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2198                                              1 << shift);
2199
2200                         if (brate == own_rate) {
2201                                 supp_rates |= BIT(j);
2202                                 if (basic_rates && is_basic)
2203                                         *basic_rates |= BIT(j);
2204                         }
2205                 }
2206         }
2207         return supp_rates;
2208 }
2209
2210 void ieee80211_stop_device(struct ieee80211_local *local)
2211 {
2212         ieee80211_led_radio(local, false);
2213         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2214
2215         cancel_work_sync(&local->reconfig_filter);
2216
2217         flush_workqueue(local->workqueue);
2218         drv_stop(local);
2219 }
2220
2221 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2222                                            bool aborted)
2223 {
2224         /* It's possible that we don't handle the scan completion in
2225          * time during suspend, so if it's still marked as completed
2226          * here, queue the work and flush it to clean things up.
2227          * Instead of calling the worker function directly here, we
2228          * really queue it to avoid potential races with other flows
2229          * scheduling the same work.
2230          */
2231         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2232                 /* If coming from reconfiguration failure, abort the scan so
2233                  * we don't attempt to continue a partial HW scan - which is
2234                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2235                  * completed scan, and a 5 GHz portion is still pending.
2236                  */
2237                 if (aborted)
2238                         set_bit(SCAN_ABORTED, &local->scanning);
2239                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2240                 flush_delayed_work(&local->scan_work);
2241         }
2242 }
2243
2244 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2245 {
2246         struct ieee80211_sub_if_data *sdata;
2247         struct ieee80211_chanctx *ctx;
2248
2249         /*
2250          * We get here if during resume the device can't be restarted properly.
2251          * We might also get here if this happens during HW reset, which is a
2252          * slightly different situation and we need to drop all connections in
2253          * the latter case.
2254          *
2255          * Ask cfg80211 to turn off all interfaces, this will result in more
2256          * warnings but at least we'll then get into a clean stopped state.
2257          */
2258
2259         local->resuming = false;
2260         local->suspended = false;
2261         local->in_reconfig = false;
2262
2263         ieee80211_flush_completed_scan(local, true);
2264
2265         /* scheduled scan clearly can't be running any more, but tell
2266          * cfg80211 and clear local state
2267          */
2268         ieee80211_sched_scan_end(local);
2269
2270         list_for_each_entry(sdata, &local->interfaces, list)
2271                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2272
2273         /* Mark channel contexts as not being in the driver any more to avoid
2274          * removing them from the driver during the shutdown process...
2275          */
2276         mutex_lock(&local->chanctx_mtx);
2277         list_for_each_entry(ctx, &local->chanctx_list, list)
2278                 ctx->driver_present = false;
2279         mutex_unlock(&local->chanctx_mtx);
2280 }
2281
2282 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2283                                      struct ieee80211_sub_if_data *sdata,
2284                                      struct ieee80211_link_data *link)
2285 {
2286         struct ieee80211_chanctx_conf *conf;
2287         struct ieee80211_chanctx *ctx;
2288
2289         if (!local->use_chanctx)
2290                 return;
2291
2292         mutex_lock(&local->chanctx_mtx);
2293         conf = rcu_dereference_protected(link->conf->chanctx_conf,
2294                                          lockdep_is_held(&local->chanctx_mtx));
2295         if (conf) {
2296                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2297                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2298         }
2299         mutex_unlock(&local->chanctx_mtx);
2300 }
2301
2302 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2303 {
2304         struct ieee80211_local *local = sdata->local;
2305         struct sta_info *sta;
2306
2307         /* add STAs back */
2308         mutex_lock(&local->sta_mtx);
2309         list_for_each_entry(sta, &local->sta_list, list) {
2310                 enum ieee80211_sta_state state;
2311
2312                 if (!sta->uploaded || sta->sdata != sdata)
2313                         continue;
2314
2315                 for (state = IEEE80211_STA_NOTEXIST;
2316                      state < sta->sta_state; state++)
2317                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2318                                               state + 1));
2319         }
2320         mutex_unlock(&local->sta_mtx);
2321 }
2322
2323 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2324 {
2325         struct cfg80211_nan_func *func, **funcs;
2326         int res, id, i = 0;
2327
2328         res = drv_start_nan(sdata->local, sdata,
2329                             &sdata->u.nan.conf);
2330         if (WARN_ON(res))
2331                 return res;
2332
2333         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2334                         sizeof(*funcs),
2335                         GFP_KERNEL);
2336         if (!funcs)
2337                 return -ENOMEM;
2338
2339         /* Add all the functions:
2340          * This is a little bit ugly. We need to call a potentially sleeping
2341          * callback for each NAN function, so we can't hold the spinlock.
2342          */
2343         spin_lock_bh(&sdata->u.nan.func_lock);
2344
2345         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2346                 funcs[i++] = func;
2347
2348         spin_unlock_bh(&sdata->u.nan.func_lock);
2349
2350         for (i = 0; funcs[i]; i++) {
2351                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2352                 if (WARN_ON(res))
2353                         ieee80211_nan_func_terminated(&sdata->vif,
2354                                                       funcs[i]->instance_id,
2355                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2356                                                       GFP_KERNEL);
2357         }
2358
2359         kfree(funcs);
2360
2361         return 0;
2362 }
2363
2364 int ieee80211_reconfig(struct ieee80211_local *local)
2365 {
2366         struct ieee80211_hw *hw = &local->hw;
2367         struct ieee80211_sub_if_data *sdata;
2368         struct ieee80211_chanctx *ctx;
2369         struct sta_info *sta;
2370         int res, i;
2371         bool reconfig_due_to_wowlan = false;
2372         struct ieee80211_sub_if_data *sched_scan_sdata;
2373         struct cfg80211_sched_scan_request *sched_scan_req;
2374         bool sched_scan_stopped = false;
2375         bool suspended = local->suspended;
2376         bool in_reconfig = false;
2377
2378         /* nothing to do if HW shouldn't run */
2379         if (!local->open_count)
2380                 goto wake_up;
2381
2382 #ifdef CONFIG_PM
2383         if (suspended)
2384                 local->resuming = true;
2385
2386         if (local->wowlan) {
2387                 /*
2388                  * In the wowlan case, both mac80211 and the device
2389                  * are functional when the resume op is called, so
2390                  * clear local->suspended so the device could operate
2391                  * normally (e.g. pass rx frames).
2392                  */
2393                 local->suspended = false;
2394                 res = drv_resume(local);
2395                 local->wowlan = false;
2396                 if (res < 0) {
2397                         local->resuming = false;
2398                         return res;
2399                 }
2400                 if (res == 0)
2401                         goto wake_up;
2402                 WARN_ON(res > 1);
2403                 /*
2404                  * res is 1, which means the driver requested
2405                  * to go through a regular reset on wakeup.
2406                  * restore local->suspended in this case.
2407                  */
2408                 reconfig_due_to_wowlan = true;
2409                 local->suspended = true;
2410         }
2411 #endif
2412
2413         /*
2414          * In case of hw_restart during suspend (without wowlan),
2415          * cancel restart work, as we are reconfiguring the device
2416          * anyway.
2417          * Note that restart_work is scheduled on a frozen workqueue,
2418          * so we can't deadlock in this case.
2419          */
2420         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2421                 cancel_work_sync(&local->restart_work);
2422
2423         local->started = false;
2424
2425         /*
2426          * Upon resume hardware can sometimes be goofy due to
2427          * various platform / driver / bus issues, so restarting
2428          * the device may at times not work immediately. Propagate
2429          * the error.
2430          */
2431         res = drv_start(local);
2432         if (res) {
2433                 if (suspended)
2434                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2435                 else
2436                         WARN(1, "Hardware became unavailable during restart.\n");
2437                 ieee80211_handle_reconfig_failure(local);
2438                 return res;
2439         }
2440
2441         /* setup fragmentation threshold */
2442         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2443
2444         /* setup RTS threshold */
2445         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2446
2447         /* reset coverage class */
2448         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2449
2450         ieee80211_led_radio(local, true);
2451         ieee80211_mod_tpt_led_trig(local,
2452                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2453
2454         /* add interfaces */
2455         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2456         if (sdata) {
2457                 /* in HW restart it exists already */
2458                 WARN_ON(local->resuming);
2459                 res = drv_add_interface(local, sdata);
2460                 if (WARN_ON(res)) {
2461                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2462                         synchronize_net();
2463                         kfree(sdata);
2464                 }
2465         }
2466
2467         list_for_each_entry(sdata, &local->interfaces, list) {
2468                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2469                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2470                     ieee80211_sdata_running(sdata)) {
2471                         res = drv_add_interface(local, sdata);
2472                         if (WARN_ON(res))
2473                                 break;
2474                 }
2475         }
2476
2477         /* If adding any of the interfaces failed above, roll back and
2478          * report failure.
2479          */
2480         if (res) {
2481                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2482                                                      list)
2483                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2484                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2485                             ieee80211_sdata_running(sdata))
2486                                 drv_remove_interface(local, sdata);
2487                 ieee80211_handle_reconfig_failure(local);
2488                 return res;
2489         }
2490
2491         /* add channel contexts */
2492         if (local->use_chanctx) {
2493                 mutex_lock(&local->chanctx_mtx);
2494                 list_for_each_entry(ctx, &local->chanctx_list, list)
2495                         if (ctx->replace_state !=
2496                             IEEE80211_CHANCTX_REPLACES_OTHER)
2497                                 WARN_ON(drv_add_chanctx(local, ctx));
2498                 mutex_unlock(&local->chanctx_mtx);
2499
2500                 sdata = wiphy_dereference(local->hw.wiphy,
2501                                           local->monitor_sdata);
2502                 if (sdata && ieee80211_sdata_running(sdata))
2503                         ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2504         }
2505
2506         /* reconfigure hardware */
2507         ieee80211_hw_config(local, ~0);
2508
2509         ieee80211_configure_filter(local);
2510
2511         /* Finally also reconfigure all the BSS information */
2512         list_for_each_entry(sdata, &local->interfaces, list) {
2513                 unsigned int link_id;
2514                 u32 changed;
2515
2516                 if (!ieee80211_sdata_running(sdata))
2517                         continue;
2518
2519                 sdata_lock(sdata);
2520                 for (link_id = 0;
2521                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
2522                      link_id++) {
2523                         struct ieee80211_link_data *link;
2524
2525                         link = sdata_dereference(sdata->link[link_id], sdata);
2526                         if (link)
2527                                 ieee80211_assign_chanctx(local, sdata, link);
2528                 }
2529                 sdata_unlock(sdata);
2530
2531                 switch (sdata->vif.type) {
2532                 case NL80211_IFTYPE_AP_VLAN:
2533                 case NL80211_IFTYPE_MONITOR:
2534                         break;
2535                 case NL80211_IFTYPE_ADHOC:
2536                         if (sdata->vif.cfg.ibss_joined)
2537                                 WARN_ON(drv_join_ibss(local, sdata));
2538                         fallthrough;
2539                 default:
2540                         ieee80211_reconfig_stations(sdata);
2541                         fallthrough;
2542                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2543                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2544                                 drv_conf_tx(local, &sdata->deflink, i,
2545                                             &sdata->deflink.tx_conf[i]);
2546                         break;
2547                 }
2548
2549                 /* common change flags for all interface types */
2550                 changed = BSS_CHANGED_ERP_CTS_PROT |
2551                           BSS_CHANGED_ERP_PREAMBLE |
2552                           BSS_CHANGED_ERP_SLOT |
2553                           BSS_CHANGED_HT |
2554                           BSS_CHANGED_BASIC_RATES |
2555                           BSS_CHANGED_BEACON_INT |
2556                           BSS_CHANGED_BSSID |
2557                           BSS_CHANGED_CQM |
2558                           BSS_CHANGED_QOS |
2559                           BSS_CHANGED_IDLE |
2560                           BSS_CHANGED_TXPOWER |
2561                           BSS_CHANGED_MCAST_RATE;
2562
2563                 if (sdata->vif.bss_conf.mu_mimo_owner)
2564                         changed |= BSS_CHANGED_MU_GROUPS;
2565
2566                 switch (sdata->vif.type) {
2567                 case NL80211_IFTYPE_STATION:
2568                         changed |= BSS_CHANGED_ASSOC |
2569                                    BSS_CHANGED_ARP_FILTER |
2570                                    BSS_CHANGED_PS;
2571
2572                         /* Re-send beacon info report to the driver */
2573                         if (sdata->deflink.u.mgd.have_beacon)
2574                                 changed |= BSS_CHANGED_BEACON_INFO;
2575
2576                         if (sdata->vif.bss_conf.max_idle_period ||
2577                             sdata->vif.bss_conf.protected_keep_alive)
2578                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2579
2580                         sdata_lock(sdata);
2581                         ieee80211_bss_info_change_notify(sdata, changed);
2582                         sdata_unlock(sdata);
2583                         break;
2584                 case NL80211_IFTYPE_OCB:
2585                         changed |= BSS_CHANGED_OCB;
2586                         ieee80211_bss_info_change_notify(sdata, changed);
2587                         break;
2588                 case NL80211_IFTYPE_ADHOC:
2589                         changed |= BSS_CHANGED_IBSS;
2590                         fallthrough;
2591                 case NL80211_IFTYPE_AP:
2592                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2593
2594                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2595                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2596                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2597                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2598
2599                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2600                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2601
2602                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2603                                         drv_start_ap(local, sdata,
2604                                                      sdata->deflink.conf);
2605                         }
2606                         fallthrough;
2607                 case NL80211_IFTYPE_MESH_POINT:
2608                         if (sdata->vif.bss_conf.enable_beacon) {
2609                                 changed |= BSS_CHANGED_BEACON |
2610                                            BSS_CHANGED_BEACON_ENABLED;
2611                                 ieee80211_bss_info_change_notify(sdata, changed);
2612                         }
2613                         break;
2614                 case NL80211_IFTYPE_NAN:
2615                         res = ieee80211_reconfig_nan(sdata);
2616                         if (res < 0) {
2617                                 ieee80211_handle_reconfig_failure(local);
2618                                 return res;
2619                         }
2620                         break;
2621                 case NL80211_IFTYPE_AP_VLAN:
2622                 case NL80211_IFTYPE_MONITOR:
2623                 case NL80211_IFTYPE_P2P_DEVICE:
2624                         /* nothing to do */
2625                         break;
2626                 case NL80211_IFTYPE_UNSPECIFIED:
2627                 case NUM_NL80211_IFTYPES:
2628                 case NL80211_IFTYPE_P2P_CLIENT:
2629                 case NL80211_IFTYPE_P2P_GO:
2630                 case NL80211_IFTYPE_WDS:
2631                         WARN_ON(1);
2632                         break;
2633                 }
2634         }
2635
2636         ieee80211_recalc_ps(local);
2637
2638         /*
2639          * The sta might be in psm against the ap (e.g. because
2640          * this was the state before a hw restart), so we
2641          * explicitly send a null packet in order to make sure
2642          * it'll sync against the ap (and get out of psm).
2643          */
2644         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2645                 list_for_each_entry(sdata, &local->interfaces, list) {
2646                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2647                                 continue;
2648                         if (!sdata->u.mgd.associated)
2649                                 continue;
2650
2651                         ieee80211_send_nullfunc(local, sdata, false);
2652                 }
2653         }
2654
2655         /* APs are now beaconing, add back stations */
2656         mutex_lock(&local->sta_mtx);
2657         list_for_each_entry(sta, &local->sta_list, list) {
2658                 enum ieee80211_sta_state state;
2659
2660                 if (!sta->uploaded)
2661                         continue;
2662
2663                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2664                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2665                         continue;
2666
2667                 for (state = IEEE80211_STA_NOTEXIST;
2668                      state < sta->sta_state; state++)
2669                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2670                                               state + 1));
2671         }
2672         mutex_unlock(&local->sta_mtx);
2673
2674         /* add back keys */
2675         list_for_each_entry(sdata, &local->interfaces, list)
2676                 ieee80211_reenable_keys(sdata);
2677
2678         /* Reconfigure sched scan if it was interrupted by FW restart */
2679         mutex_lock(&local->mtx);
2680         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2681                                                 lockdep_is_held(&local->mtx));
2682         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2683                                                 lockdep_is_held(&local->mtx));
2684         if (sched_scan_sdata && sched_scan_req)
2685                 /*
2686                  * Sched scan stopped, but we don't want to report it. Instead,
2687                  * we're trying to reschedule. However, if more than one scan
2688                  * plan was set, we cannot reschedule since we don't know which
2689                  * scan plan was currently running (and some scan plans may have
2690                  * already finished).
2691                  */
2692                 if (sched_scan_req->n_scan_plans > 1 ||
2693                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2694                                                          sched_scan_req)) {
2695                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2696                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2697                         sched_scan_stopped = true;
2698                 }
2699         mutex_unlock(&local->mtx);
2700
2701         if (sched_scan_stopped)
2702                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2703
2704  wake_up:
2705
2706         if (local->monitors == local->open_count && local->monitors > 0)
2707                 ieee80211_add_virtual_monitor(local);
2708
2709         /*
2710          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2711          * sessions can be established after a resume.
2712          *
2713          * Also tear down aggregation sessions since reconfiguring
2714          * them in a hardware restart scenario is not easily done
2715          * right now, and the hardware will have lost information
2716          * about the sessions, but we and the AP still think they
2717          * are active. This is really a workaround though.
2718          */
2719         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2720                 mutex_lock(&local->sta_mtx);
2721
2722                 list_for_each_entry(sta, &local->sta_list, list) {
2723                         if (!local->resuming)
2724                                 ieee80211_sta_tear_down_BA_sessions(
2725                                                 sta, AGG_STOP_LOCAL_REQUEST);
2726                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2727                 }
2728
2729                 mutex_unlock(&local->sta_mtx);
2730         }
2731
2732         /*
2733          * If this is for hw restart things are still running.
2734          * We may want to change that later, however.
2735          */
2736         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2737                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2738
2739         if (local->in_reconfig) {
2740                 in_reconfig = local->in_reconfig;
2741                 local->in_reconfig = false;
2742                 barrier();
2743
2744                 /* Restart deferred ROCs */
2745                 mutex_lock(&local->mtx);
2746                 ieee80211_start_next_roc(local);
2747                 mutex_unlock(&local->mtx);
2748
2749                 /* Requeue all works */
2750                 list_for_each_entry(sdata, &local->interfaces, list)
2751                         ieee80211_queue_work(&local->hw, &sdata->work);
2752         }
2753
2754         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2755                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2756                                         false);
2757
2758         if (in_reconfig) {
2759                 list_for_each_entry(sdata, &local->interfaces, list) {
2760                         if (!ieee80211_sdata_running(sdata))
2761                                 continue;
2762                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2763                                 ieee80211_sta_restart(sdata);
2764                 }
2765         }
2766
2767         if (!suspended)
2768                 return 0;
2769
2770 #ifdef CONFIG_PM
2771         /* first set suspended false, then resuming */
2772         local->suspended = false;
2773         mb();
2774         local->resuming = false;
2775
2776         ieee80211_flush_completed_scan(local, false);
2777
2778         if (local->open_count && !reconfig_due_to_wowlan)
2779                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2780
2781         list_for_each_entry(sdata, &local->interfaces, list) {
2782                 if (!ieee80211_sdata_running(sdata))
2783                         continue;
2784                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2785                         ieee80211_sta_restart(sdata);
2786         }
2787
2788         mod_timer(&local->sta_cleanup, jiffies + 1);
2789 #else
2790         WARN_ON(1);
2791 #endif
2792
2793         return 0;
2794 }
2795
2796 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2797 {
2798         struct ieee80211_sub_if_data *sdata;
2799         struct ieee80211_local *local;
2800         struct ieee80211_key *key;
2801
2802         if (WARN_ON(!vif))
2803                 return;
2804
2805         sdata = vif_to_sdata(vif);
2806         local = sdata->local;
2807
2808         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2809                     !local->resuming))
2810                 return;
2811
2812         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2813                     !local->in_reconfig))
2814                 return;
2815
2816         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2817                 return;
2818
2819         sdata->flags |= flag;
2820
2821         mutex_lock(&local->key_mtx);
2822         list_for_each_entry(key, &sdata->key_list, list)
2823                 key->flags |= KEY_FLAG_TAINTED;
2824         mutex_unlock(&local->key_mtx);
2825 }
2826
2827 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2828 {
2829         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2830 }
2831 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2832
2833 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2834 {
2835         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2836 }
2837 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2838
2839 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2840                            struct ieee80211_link_data *link)
2841 {
2842         struct ieee80211_local *local = sdata->local;
2843         struct ieee80211_chanctx_conf *chanctx_conf;
2844         struct ieee80211_chanctx *chanctx;
2845
2846         mutex_lock(&local->chanctx_mtx);
2847
2848         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2849                                                  lockdep_is_held(&local->chanctx_mtx));
2850
2851         /*
2852          * This function can be called from a work, thus it may be possible
2853          * that the chanctx_conf is removed (due to a disconnection, for
2854          * example).
2855          * So nothing should be done in such case.
2856          */
2857         if (!chanctx_conf)
2858                 goto unlock;
2859
2860         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2861         ieee80211_recalc_smps_chanctx(local, chanctx);
2862  unlock:
2863         mutex_unlock(&local->chanctx_mtx);
2864 }
2865
2866 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2867                                   int link_id)
2868 {
2869         struct ieee80211_local *local = sdata->local;
2870         struct ieee80211_chanctx_conf *chanctx_conf;
2871         struct ieee80211_chanctx *chanctx;
2872         int i;
2873
2874         mutex_lock(&local->chanctx_mtx);
2875
2876         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2877                 struct ieee80211_bss_conf *bss_conf;
2878
2879                 if (link_id >= 0 && link_id != i)
2880                         continue;
2881
2882                 rcu_read_lock();
2883                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2884                 if (!bss_conf) {
2885                         rcu_read_unlock();
2886                         continue;
2887                 }
2888
2889                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2890                                                          lockdep_is_held(&local->chanctx_mtx));
2891                 /*
2892                  * Since we hold the chanctx_mtx (checked above)
2893                  * we can take the chanctx_conf pointer out of the
2894                  * RCU critical section, it cannot go away without
2895                  * the mutex. Just the way we reached it could - in
2896                  * theory - go away, but we don't really care and
2897                  * it really shouldn't happen anyway.
2898                  */
2899                 rcu_read_unlock();
2900
2901                 if (WARN_ON_ONCE(!chanctx_conf))
2902                         goto unlock;
2903
2904                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2905                                        conf);
2906                 ieee80211_recalc_chanctx_min_def(local, chanctx);
2907         }
2908  unlock:
2909         mutex_unlock(&local->chanctx_mtx);
2910 }
2911
2912 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2913 {
2914         size_t pos = offset;
2915
2916         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2917                 pos += 2 + ies[pos + 1];
2918
2919         return pos;
2920 }
2921
2922 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2923                               u16 cap)
2924 {
2925         __le16 tmp;
2926
2927         *pos++ = WLAN_EID_HT_CAPABILITY;
2928         *pos++ = sizeof(struct ieee80211_ht_cap);
2929         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2930
2931         /* capability flags */
2932         tmp = cpu_to_le16(cap);
2933         memcpy(pos, &tmp, sizeof(u16));
2934         pos += sizeof(u16);
2935
2936         /* AMPDU parameters */
2937         *pos++ = ht_cap->ampdu_factor |
2938                  (ht_cap->ampdu_density <<
2939                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2940
2941         /* MCS set */
2942         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2943         pos += sizeof(ht_cap->mcs);
2944
2945         /* extended capabilities */
2946         pos += sizeof(__le16);
2947
2948         /* BF capabilities */
2949         pos += sizeof(__le32);
2950
2951         /* antenna selection */
2952         pos += sizeof(u8);
2953
2954         return pos;
2955 }
2956
2957 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2958                                u32 cap)
2959 {
2960         __le32 tmp;
2961
2962         *pos++ = WLAN_EID_VHT_CAPABILITY;
2963         *pos++ = sizeof(struct ieee80211_vht_cap);
2964         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2965
2966         /* capability flags */
2967         tmp = cpu_to_le32(cap);
2968         memcpy(pos, &tmp, sizeof(u32));
2969         pos += sizeof(u32);
2970
2971         /* VHT MCS set */
2972         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2973         pos += sizeof(vht_cap->vht_mcs);
2974
2975         return pos;
2976 }
2977
2978 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2979 {
2980         const struct ieee80211_sta_he_cap *he_cap;
2981         struct ieee80211_supported_band *sband;
2982         u8 n;
2983
2984         sband = ieee80211_get_sband(sdata);
2985         if (!sband)
2986                 return 0;
2987
2988         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2989         if (!he_cap)
2990                 return 0;
2991
2992         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2993         return 2 + 1 +
2994                sizeof(he_cap->he_cap_elem) + n +
2995                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2996                                      he_cap->he_cap_elem.phy_cap_info);
2997 }
2998
2999 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
3000                               const struct ieee80211_sta_he_cap *he_cap,
3001                               u8 *end)
3002 {
3003         struct ieee80211_he_cap_elem elem;
3004         u8 n;
3005         u8 ie_len;
3006         u8 *orig_pos = pos;
3007
3008         /* Make sure we have place for the IE */
3009         /*
3010          * TODO: the 1 added is because this temporarily is under the EXTENSION
3011          * IE. Get rid of it when it moves.
3012          */
3013         if (!he_cap)
3014                 return orig_pos;
3015
3016         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
3017         elem = he_cap->he_cap_elem;
3018
3019         if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3020                 elem.phy_cap_info[0] &=
3021                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3022                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3023
3024         if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3025                 elem.phy_cap_info[0] &=
3026                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3027
3028         if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3029                 elem.phy_cap_info[0] &=
3030                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3031
3032         n = ieee80211_he_mcs_nss_size(&elem);
3033         ie_len = 2 + 1 +
3034                  sizeof(he_cap->he_cap_elem) + n +
3035                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3036                                        he_cap->he_cap_elem.phy_cap_info);
3037
3038         if ((end - pos) < ie_len)
3039                 return orig_pos;
3040
3041         *pos++ = WLAN_EID_EXTENSION;
3042         pos++; /* We'll set the size later below */
3043         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3044
3045         /* Fixed data */
3046         memcpy(pos, &elem, sizeof(elem));
3047         pos += sizeof(elem);
3048
3049         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3050         pos += n;
3051
3052         /* Check if PPE Threshold should be present */
3053         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3054              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3055                 goto end;
3056
3057         /*
3058          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3059          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3060          */
3061         n = hweight8(he_cap->ppe_thres[0] &
3062                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3063         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3064                    IEEE80211_PPE_THRES_NSS_POS));
3065
3066         /*
3067          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3068          * total size.
3069          */
3070         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3071         n = DIV_ROUND_UP(n, 8);
3072
3073         /* Copy PPE Thresholds */
3074         memcpy(pos, &he_cap->ppe_thres, n);
3075         pos += n;
3076
3077 end:
3078         orig_pos[1] = (pos - orig_pos) - 2;
3079         return pos;
3080 }
3081
3082 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3083                                     struct sk_buff *skb)
3084 {
3085         struct ieee80211_supported_band *sband;
3086         const struct ieee80211_sband_iftype_data *iftd;
3087         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3088         u8 *pos;
3089         u16 cap;
3090
3091         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3092                                           BIT(NL80211_BAND_6GHZ),
3093                                           IEEE80211_CHAN_NO_HE))
3094                 return;
3095
3096         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3097
3098         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3099         if (!iftd)
3100                 return;
3101
3102         /* Check for device HE 6 GHz capability before adding element */
3103         if (!iftd->he_6ghz_capa.capa)
3104                 return;
3105
3106         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3107         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3108
3109         switch (sdata->deflink.smps_mode) {
3110         case IEEE80211_SMPS_AUTOMATIC:
3111         case IEEE80211_SMPS_NUM_MODES:
3112                 WARN_ON(1);
3113                 fallthrough;
3114         case IEEE80211_SMPS_OFF:
3115                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3116                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3117                 break;
3118         case IEEE80211_SMPS_STATIC:
3119                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3120                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3121                 break;
3122         case IEEE80211_SMPS_DYNAMIC:
3123                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3124                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3125                 break;
3126         }
3127
3128         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3129         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3130                                     pos + 2 + 1 + sizeof(cap));
3131 }
3132
3133 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3134                                const struct cfg80211_chan_def *chandef,
3135                                u16 prot_mode, bool rifs_mode)
3136 {
3137         struct ieee80211_ht_operation *ht_oper;
3138         /* Build HT Information */
3139         *pos++ = WLAN_EID_HT_OPERATION;
3140         *pos++ = sizeof(struct ieee80211_ht_operation);
3141         ht_oper = (struct ieee80211_ht_operation *)pos;
3142         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3143                                         chandef->chan->center_freq);
3144         switch (chandef->width) {
3145         case NL80211_CHAN_WIDTH_160:
3146         case NL80211_CHAN_WIDTH_80P80:
3147         case NL80211_CHAN_WIDTH_80:
3148         case NL80211_CHAN_WIDTH_40:
3149                 if (chandef->center_freq1 > chandef->chan->center_freq)
3150                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3151                 else
3152                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3153                 break;
3154         case NL80211_CHAN_WIDTH_320:
3155                 /* HT information element should not be included on 6GHz */
3156                 WARN_ON(1);
3157                 return pos;
3158         default:
3159                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3160                 break;
3161         }
3162         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3163             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3164             chandef->width != NL80211_CHAN_WIDTH_20)
3165                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3166
3167         if (rifs_mode)
3168                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3169
3170         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3171         ht_oper->stbc_param = 0x0000;
3172
3173         /* It seems that Basic MCS set and Supported MCS set
3174            are identical for the first 10 bytes */
3175         memset(&ht_oper->basic_set, 0, 16);
3176         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3177
3178         return pos + sizeof(struct ieee80211_ht_operation);
3179 }
3180
3181 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3182                                    const struct cfg80211_chan_def *chandef)
3183 {
3184         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3185         *pos++ = 3;                                     /* IE length */
3186         /* New channel width */
3187         switch (chandef->width) {
3188         case NL80211_CHAN_WIDTH_80:
3189                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3190                 break;
3191         case NL80211_CHAN_WIDTH_160:
3192                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3193                 break;
3194         case NL80211_CHAN_WIDTH_80P80:
3195                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3196                 break;
3197         case NL80211_CHAN_WIDTH_320:
3198                 /* The behavior is not defined for 320 MHz channels */
3199                 WARN_ON(1);
3200                 fallthrough;
3201         default:
3202                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3203         }
3204
3205         /* new center frequency segment 0 */
3206         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3207         /* new center frequency segment 1 */
3208         if (chandef->center_freq2)
3209                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3210         else
3211                 *pos++ = 0;
3212 }
3213
3214 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3215                                 const struct cfg80211_chan_def *chandef)
3216 {
3217         struct ieee80211_vht_operation *vht_oper;
3218
3219         *pos++ = WLAN_EID_VHT_OPERATION;
3220         *pos++ = sizeof(struct ieee80211_vht_operation);
3221         vht_oper = (struct ieee80211_vht_operation *)pos;
3222         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3223                                                         chandef->center_freq1);
3224         if (chandef->center_freq2)
3225                 vht_oper->center_freq_seg1_idx =
3226                         ieee80211_frequency_to_channel(chandef->center_freq2);
3227         else
3228                 vht_oper->center_freq_seg1_idx = 0x00;
3229
3230         switch (chandef->width) {
3231         case NL80211_CHAN_WIDTH_160:
3232                 /*
3233                  * Convert 160 MHz channel width to new style as interop
3234                  * workaround.
3235                  */
3236                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3237                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3238                 if (chandef->chan->center_freq < chandef->center_freq1)
3239                         vht_oper->center_freq_seg0_idx -= 8;
3240                 else
3241                         vht_oper->center_freq_seg0_idx += 8;
3242                 break;
3243         case NL80211_CHAN_WIDTH_80P80:
3244                 /*
3245                  * Convert 80+80 MHz channel width to new style as interop
3246                  * workaround.
3247                  */
3248                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3249                 break;
3250         case NL80211_CHAN_WIDTH_80:
3251                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3252                 break;
3253         case NL80211_CHAN_WIDTH_320:
3254                 /* VHT information element should not be included on 6GHz */
3255                 WARN_ON(1);
3256                 return pos;
3257         default:
3258                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3259                 break;
3260         }
3261
3262         /* don't require special VHT peer rates */
3263         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3264
3265         return pos + sizeof(struct ieee80211_vht_operation);
3266 }
3267
3268 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3269 {
3270         struct ieee80211_he_operation *he_oper;
3271         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3272         u32 he_oper_params;
3273         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3274
3275         if (chandef->chan->band == NL80211_BAND_6GHZ)
3276                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3277
3278         *pos++ = WLAN_EID_EXTENSION;
3279         *pos++ = ie_len;
3280         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3281
3282         he_oper_params = 0;
3283         he_oper_params |= u32_encode_bits(1023, /* disabled */
3284                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3285         he_oper_params |= u32_encode_bits(1,
3286                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3287         he_oper_params |= u32_encode_bits(1,
3288                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3289         if (chandef->chan->band == NL80211_BAND_6GHZ)
3290                 he_oper_params |= u32_encode_bits(1,
3291                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3292
3293         he_oper = (struct ieee80211_he_operation *)pos;
3294         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3295
3296         /* don't require special HE peer rates */
3297         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3298         pos += sizeof(struct ieee80211_he_operation);
3299
3300         if (chandef->chan->band != NL80211_BAND_6GHZ)
3301                 goto out;
3302
3303         /* TODO add VHT operational */
3304         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3305         he_6ghz_op->minrate = 6; /* 6 Mbps */
3306         he_6ghz_op->primary =
3307                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3308         he_6ghz_op->ccfs0 =
3309                 ieee80211_frequency_to_channel(chandef->center_freq1);
3310         if (chandef->center_freq2)
3311                 he_6ghz_op->ccfs1 =
3312                         ieee80211_frequency_to_channel(chandef->center_freq2);
3313         else
3314                 he_6ghz_op->ccfs1 = 0;
3315
3316         switch (chandef->width) {
3317         case NL80211_CHAN_WIDTH_320:
3318                 /*
3319                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3320                  * channels.
3321                  */
3322                 WARN_ON(1);
3323                 break;
3324         case NL80211_CHAN_WIDTH_160:
3325                 /* Convert 160 MHz channel width to new style as interop
3326                  * workaround.
3327                  */
3328                 he_6ghz_op->control =
3329                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3330                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3331                 if (chandef->chan->center_freq < chandef->center_freq1)
3332                         he_6ghz_op->ccfs0 -= 8;
3333                 else
3334                         he_6ghz_op->ccfs0 += 8;
3335                 fallthrough;
3336         case NL80211_CHAN_WIDTH_80P80:
3337                 he_6ghz_op->control =
3338                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3339                 break;
3340         case NL80211_CHAN_WIDTH_80:
3341                 he_6ghz_op->control =
3342                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3343                 break;
3344         case NL80211_CHAN_WIDTH_40:
3345                 he_6ghz_op->control =
3346                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3347                 break;
3348         default:
3349                 he_6ghz_op->control =
3350                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3351                 break;
3352         }
3353
3354         pos += sizeof(struct ieee80211_he_6ghz_oper);
3355
3356 out:
3357         return pos;
3358 }
3359
3360 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3361                                struct cfg80211_chan_def *chandef)
3362 {
3363         enum nl80211_channel_type channel_type;
3364
3365         if (!ht_oper)
3366                 return false;
3367
3368         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3369         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3370                 channel_type = NL80211_CHAN_HT20;
3371                 break;
3372         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3373                 channel_type = NL80211_CHAN_HT40PLUS;
3374                 break;
3375         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3376                 channel_type = NL80211_CHAN_HT40MINUS;
3377                 break;
3378         default:
3379                 return false;
3380         }
3381
3382         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3383         return true;
3384 }
3385
3386 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3387                                 const struct ieee80211_vht_operation *oper,
3388                                 const struct ieee80211_ht_operation *htop,
3389                                 struct cfg80211_chan_def *chandef)
3390 {
3391         struct cfg80211_chan_def new = *chandef;
3392         int cf0, cf1;
3393         int ccfs0, ccfs1, ccfs2;
3394         int ccf0, ccf1;
3395         u32 vht_cap;
3396         bool support_80_80 = false;
3397         bool support_160 = false;
3398         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3399                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3400         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3401                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3402
3403         if (!oper || !htop)
3404                 return false;
3405
3406         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3407         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3408                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3409         support_80_80 = ((vht_cap &
3410                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3411                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3412                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3413                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3414                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3415         ccfs0 = oper->center_freq_seg0_idx;
3416         ccfs1 = oper->center_freq_seg1_idx;
3417         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3418                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3419                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3420
3421         ccf0 = ccfs0;
3422
3423         /* if not supported, parse as though we didn't understand it */
3424         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3425                 ext_nss_bw_supp = 0;
3426
3427         /*
3428          * Cf. IEEE 802.11 Table 9-250
3429          *
3430          * We really just consider that because it's inefficient to connect
3431          * at a higher bandwidth than we'll actually be able to use.
3432          */
3433         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3434         default:
3435         case 0x00:
3436                 ccf1 = 0;
3437                 support_160 = false;
3438                 support_80_80 = false;
3439                 break;
3440         case 0x01:
3441                 support_80_80 = false;
3442                 fallthrough;
3443         case 0x02:
3444         case 0x03:
3445                 ccf1 = ccfs2;
3446                 break;
3447         case 0x10:
3448                 ccf1 = ccfs1;
3449                 break;
3450         case 0x11:
3451         case 0x12:
3452                 if (!ccfs1)
3453                         ccf1 = ccfs2;
3454                 else
3455                         ccf1 = ccfs1;
3456                 break;
3457         case 0x13:
3458         case 0x20:
3459         case 0x23:
3460                 ccf1 = ccfs1;
3461                 break;
3462         }
3463
3464         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3465         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3466
3467         switch (oper->chan_width) {
3468         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3469                 /* just use HT information directly */
3470                 break;
3471         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3472                 new.width = NL80211_CHAN_WIDTH_80;
3473                 new.center_freq1 = cf0;
3474                 /* If needed, adjust based on the newer interop workaround. */
3475                 if (ccf1) {
3476                         unsigned int diff;
3477
3478                         diff = abs(ccf1 - ccf0);
3479                         if ((diff == 8) && support_160) {
3480                                 new.width = NL80211_CHAN_WIDTH_160;
3481                                 new.center_freq1 = cf1;
3482                         } else if ((diff > 8) && support_80_80) {
3483                                 new.width = NL80211_CHAN_WIDTH_80P80;
3484                                 new.center_freq2 = cf1;
3485                         }
3486                 }
3487                 break;
3488         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3489                 /* deprecated encoding */
3490                 new.width = NL80211_CHAN_WIDTH_160;
3491                 new.center_freq1 = cf0;
3492                 break;
3493         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3494                 /* deprecated encoding */
3495                 new.width = NL80211_CHAN_WIDTH_80P80;
3496                 new.center_freq1 = cf0;
3497                 new.center_freq2 = cf1;
3498                 break;
3499         default:
3500                 return false;
3501         }
3502
3503         if (!cfg80211_chandef_valid(&new))
3504                 return false;
3505
3506         *chandef = new;
3507         return true;
3508 }
3509
3510 void ieee80211_chandef_eht_oper(struct ieee80211_sub_if_data *sdata,
3511                                 const struct ieee80211_eht_operation *eht_oper,
3512                                 bool support_160, bool support_320,
3513                                 struct cfg80211_chan_def *chandef)
3514 {
3515         struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
3516
3517         chandef->center_freq1 =
3518                 ieee80211_channel_to_frequency(info->ccfs0,
3519                                                chandef->chan->band);
3520
3521         switch (u8_get_bits(info->control,
3522                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3523         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3524                 chandef->width = NL80211_CHAN_WIDTH_20;
3525                 break;
3526         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3527                 chandef->width = NL80211_CHAN_WIDTH_40;
3528                 break;
3529         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3530                 chandef->width = NL80211_CHAN_WIDTH_80;
3531                 break;
3532         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3533                 if (support_160) {
3534                         chandef->width = NL80211_CHAN_WIDTH_160;
3535                         chandef->center_freq1 =
3536                                 ieee80211_channel_to_frequency(info->ccfs1,
3537                                                                chandef->chan->band);
3538                 } else {
3539                         chandef->width = NL80211_CHAN_WIDTH_80;
3540                 }
3541                 break;
3542         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3543                 if (support_320) {
3544                         chandef->width = NL80211_CHAN_WIDTH_320;
3545                         chandef->center_freq1 =
3546                                 ieee80211_channel_to_frequency(info->ccfs1,
3547                                                                chandef->chan->band);
3548                 } else if (support_160) {
3549                         chandef->width = NL80211_CHAN_WIDTH_160;
3550                 } else {
3551                         chandef->width = NL80211_CHAN_WIDTH_80;
3552
3553                         if (chandef->center_freq1 > chandef->chan->center_freq)
3554                                 chandef->center_freq1 -= 40;
3555                         else
3556                                 chandef->center_freq1 += 40;
3557                 }
3558                 break;
3559         }
3560 }
3561
3562 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3563                                     const struct ieee80211_he_operation *he_oper,
3564                                     const struct ieee80211_eht_operation *eht_oper,
3565                                     struct cfg80211_chan_def *chandef)
3566 {
3567         struct ieee80211_local *local = sdata->local;
3568         struct ieee80211_supported_band *sband;
3569         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3570         const struct ieee80211_sta_he_cap *he_cap;
3571         const struct ieee80211_sta_eht_cap *eht_cap;
3572         struct cfg80211_chan_def he_chandef = *chandef;
3573         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3574         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3575         bool support_80_80, support_160, support_320;
3576         u8 he_phy_cap, eht_phy_cap;
3577         u32 freq;
3578
3579         if (chandef->chan->band != NL80211_BAND_6GHZ)
3580                 return true;
3581
3582         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3583
3584         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3585         if (!he_cap) {
3586                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3587                 return false;
3588         }
3589
3590         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3591         support_160 =
3592                 he_phy_cap &
3593                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3594         support_80_80 =
3595                 he_phy_cap &
3596                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3597
3598         if (!he_oper) {
3599                 sdata_info(sdata,
3600                            "HE is not advertised on (on %d MHz), expect issues\n",
3601                            chandef->chan->center_freq);
3602                 return false;
3603         }
3604
3605         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3606         if (!eht_cap) {
3607                 sdata_info(sdata, "Missing iftype sband data/EHT cap");
3608                 eht_oper = NULL;
3609         }
3610
3611         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3612
3613         if (!he_6ghz_oper) {
3614                 sdata_info(sdata,
3615                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3616                            chandef->chan->center_freq);
3617                 return false;
3618         }
3619
3620         /*
3621          * The EHT operation IE does not contain the primary channel so the
3622          * primary channel frequency should be taken from the 6 GHz operation
3623          * information.
3624          */
3625         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3626                                               NL80211_BAND_6GHZ);
3627         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3628
3629         switch (u8_get_bits(he_6ghz_oper->control,
3630                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3631         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3632                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3633                 break;
3634         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3635                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3636                 break;
3637         default:
3638                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3639                 break;
3640         }
3641
3642         if (!eht_oper ||
3643             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3644                 switch (u8_get_bits(he_6ghz_oper->control,
3645                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3646                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3647                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3648                         break;
3649                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3650                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3651                         break;
3652                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3653                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3654                         break;
3655                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3656                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3657                         if (!he_6ghz_oper->ccfs1)
3658                                 break;
3659                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3660                                 if (support_160)
3661                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3662                         } else {
3663                                 if (support_80_80)
3664                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3665                         }
3666                         break;
3667                 }
3668
3669                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3670                         he_chandef.center_freq1 =
3671                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3672                                                                NL80211_BAND_6GHZ);
3673                 } else {
3674                         he_chandef.center_freq1 =
3675                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3676                                                                NL80211_BAND_6GHZ);
3677                         if (support_80_80 || support_160)
3678                                 he_chandef.center_freq2 =
3679                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3680                                                                        NL80211_BAND_6GHZ);
3681                 }
3682         } else {
3683                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3684                 support_320 =
3685                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3686
3687                 ieee80211_chandef_eht_oper(sdata, eht_oper, support_160,
3688                                            support_320, &he_chandef);
3689         }
3690
3691         if (!cfg80211_chandef_valid(&he_chandef)) {
3692                 sdata_info(sdata,
3693                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3694                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3695                            he_chandef.width,
3696                            he_chandef.center_freq1,
3697                            he_chandef.center_freq2);
3698                 return false;
3699         }
3700
3701         *chandef = he_chandef;
3702
3703         return true;
3704 }
3705
3706 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3707                                 struct cfg80211_chan_def *chandef)
3708 {
3709         u32 oper_freq;
3710
3711         if (!oper)
3712                 return false;
3713
3714         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3715         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3716                 chandef->width = NL80211_CHAN_WIDTH_1;
3717                 break;
3718         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3719                 chandef->width = NL80211_CHAN_WIDTH_2;
3720                 break;
3721         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3722                 chandef->width = NL80211_CHAN_WIDTH_4;
3723                 break;
3724         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3725                 chandef->width = NL80211_CHAN_WIDTH_8;
3726                 break;
3727         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3728                 chandef->width = NL80211_CHAN_WIDTH_16;
3729                 break;
3730         default:
3731                 return false;
3732         }
3733
3734         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3735                                                   NL80211_BAND_S1GHZ);
3736         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3737         chandef->freq1_offset = oper_freq % 1000;
3738
3739         return true;
3740 }
3741
3742 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
3743                              const struct ieee80211_supported_band *sband,
3744                              const u8 *srates, int srates_len, u32 *rates)
3745 {
3746         u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
3747         int shift = ieee80211_chanwidth_get_shift(width);
3748         struct ieee80211_rate *br;
3749         int brate, rate, i, j, count = 0;
3750
3751         *rates = 0;
3752
3753         for (i = 0; i < srates_len; i++) {
3754                 rate = srates[i] & 0x7f;
3755
3756                 for (j = 0; j < sband->n_bitrates; j++) {
3757                         br = &sband->bitrates[j];
3758                         if ((rate_flags & br->flags) != rate_flags)
3759                                 continue;
3760
3761                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3762                         if (brate == rate) {
3763                                 *rates |= BIT(j);
3764                                 count++;
3765                                 break;
3766                         }
3767                 }
3768         }
3769         return count;
3770 }
3771
3772 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3773                             struct sk_buff *skb, bool need_basic,
3774                             enum nl80211_band band)
3775 {
3776         struct ieee80211_local *local = sdata->local;
3777         struct ieee80211_supported_band *sband;
3778         int rate, shift;
3779         u8 i, rates, *pos;
3780         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3781         u32 rate_flags;
3782
3783         shift = ieee80211_vif_get_shift(&sdata->vif);
3784         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3785         sband = local->hw.wiphy->bands[band];
3786         rates = 0;
3787         for (i = 0; i < sband->n_bitrates; i++) {
3788                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3789                         continue;
3790                 rates++;
3791         }
3792         if (rates > 8)
3793                 rates = 8;
3794
3795         if (skb_tailroom(skb) < rates + 2)
3796                 return -ENOMEM;
3797
3798         pos = skb_put(skb, rates + 2);
3799         *pos++ = WLAN_EID_SUPP_RATES;
3800         *pos++ = rates;
3801         for (i = 0; i < rates; i++) {
3802                 u8 basic = 0;
3803                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3804                         continue;
3805
3806                 if (need_basic && basic_rates & BIT(i))
3807                         basic = 0x80;
3808                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3809                                     5 * (1 << shift));
3810                 *pos++ = basic | (u8) rate;
3811         }
3812
3813         return 0;
3814 }
3815
3816 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3817                                 struct sk_buff *skb, bool need_basic,
3818                                 enum nl80211_band band)
3819 {
3820         struct ieee80211_local *local = sdata->local;
3821         struct ieee80211_supported_band *sband;
3822         int rate, shift;
3823         u8 i, exrates, *pos;
3824         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3825         u32 rate_flags;
3826
3827         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3828         shift = ieee80211_vif_get_shift(&sdata->vif);
3829
3830         sband = local->hw.wiphy->bands[band];
3831         exrates = 0;
3832         for (i = 0; i < sband->n_bitrates; i++) {
3833                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3834                         continue;
3835                 exrates++;
3836         }
3837
3838         if (exrates > 8)
3839                 exrates -= 8;
3840         else
3841                 exrates = 0;
3842
3843         if (skb_tailroom(skb) < exrates + 2)
3844                 return -ENOMEM;
3845
3846         if (exrates) {
3847                 pos = skb_put(skb, exrates + 2);
3848                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3849                 *pos++ = exrates;
3850                 for (i = 8; i < sband->n_bitrates; i++) {
3851                         u8 basic = 0;
3852                         if ((rate_flags & sband->bitrates[i].flags)
3853                             != rate_flags)
3854                                 continue;
3855                         if (need_basic && basic_rates & BIT(i))
3856                                 basic = 0x80;
3857                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3858                                             5 * (1 << shift));
3859                         *pos++ = basic | (u8) rate;
3860                 }
3861         }
3862         return 0;
3863 }
3864
3865 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3866 {
3867         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3868
3869         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3870                 return 0;
3871
3872         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3873 }
3874 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3875
3876 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3877 {
3878         if (!mcs)
3879                 return 1;
3880
3881         /* TODO: consider rx_highest */
3882
3883         if (mcs->rx_mask[3])
3884                 return 4;
3885         if (mcs->rx_mask[2])
3886                 return 3;
3887         if (mcs->rx_mask[1])
3888                 return 2;
3889         return 1;
3890 }
3891
3892 /**
3893  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3894  * @local: mac80211 hw info struct
3895  * @status: RX status
3896  * @mpdu_len: total MPDU length (including FCS)
3897  * @mpdu_offset: offset into MPDU to calculate timestamp at
3898  *
3899  * This function calculates the RX timestamp at the given MPDU offset, taking
3900  * into account what the RX timestamp was. An offset of 0 will just normalize
3901  * the timestamp to TSF at beginning of MPDU reception.
3902  */
3903 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3904                                      struct ieee80211_rx_status *status,
3905                                      unsigned int mpdu_len,
3906                                      unsigned int mpdu_offset)
3907 {
3908         u64 ts = status->mactime;
3909         struct rate_info ri;
3910         u16 rate;
3911         u8 n_ltf;
3912
3913         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3914                 return 0;
3915
3916         memset(&ri, 0, sizeof(ri));
3917
3918         ri.bw = status->bw;
3919
3920         /* Fill cfg80211 rate info */
3921         switch (status->encoding) {
3922         case RX_ENC_HE:
3923                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3924                 ri.mcs = status->rate_idx;
3925                 ri.nss = status->nss;
3926                 ri.he_ru_alloc = status->he_ru;
3927                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3928                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3929
3930                 /*
3931                  * See P802.11ax_D6.0, section 27.3.4 for
3932                  * VHT PPDU format.
3933                  */
3934                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3935                         mpdu_offset += 2;
3936                         ts += 36;
3937
3938                         /*
3939                          * TODO:
3940                          * For HE MU PPDU, add the HE-SIG-B.
3941                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3942                          * For HE TB PPDU, add 4us for the HE-STF.
3943                          * Add the HE-LTF durations - variable.
3944                          */
3945                 }
3946
3947                 break;
3948         case RX_ENC_HT:
3949                 ri.mcs = status->rate_idx;
3950                 ri.flags |= RATE_INFO_FLAGS_MCS;
3951                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3952                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3953
3954                 /*
3955                  * See P802.11REVmd_D3.0, section 19.3.2 for
3956                  * HT PPDU format.
3957                  */
3958                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3959                         mpdu_offset += 2;
3960                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3961                                 ts += 24;
3962                         else
3963                                 ts += 32;
3964
3965                         /*
3966                          * Add Data HT-LTFs per streams
3967                          * TODO: add Extension HT-LTFs, 4us per LTF
3968                          */
3969                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3970                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3971                         ts += n_ltf * 4;
3972                 }
3973
3974                 break;
3975         case RX_ENC_VHT:
3976                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3977                 ri.mcs = status->rate_idx;
3978                 ri.nss = status->nss;
3979                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3980                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3981
3982                 /*
3983                  * See P802.11REVmd_D3.0, section 21.3.2 for
3984                  * VHT PPDU format.
3985                  */
3986                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3987                         mpdu_offset += 2;
3988                         ts += 36;
3989
3990                         /*
3991                          * Add VHT-LTFs per streams
3992                          */
3993                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3994                                 ri.nss + 1 : ri.nss;
3995                         ts += 4 * n_ltf;
3996                 }
3997
3998                 break;
3999         default:
4000                 WARN_ON(1);
4001                 fallthrough;
4002         case RX_ENC_LEGACY: {
4003                 struct ieee80211_supported_band *sband;
4004                 int shift = 0;
4005                 int bitrate;
4006
4007                 switch (status->bw) {
4008                 case RATE_INFO_BW_10:
4009                         shift = 1;
4010                         break;
4011                 case RATE_INFO_BW_5:
4012                         shift = 2;
4013                         break;
4014                 }
4015
4016                 sband = local->hw.wiphy->bands[status->band];
4017                 bitrate = sband->bitrates[status->rate_idx].bitrate;
4018                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
4019
4020                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4021                         if (status->band == NL80211_BAND_5GHZ) {
4022                                 ts += 20 << shift;
4023                                 mpdu_offset += 2;
4024                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4025                                 ts += 96;
4026                         } else {
4027                                 ts += 192;
4028                         }
4029                 }
4030                 break;
4031                 }
4032         }
4033
4034         rate = cfg80211_calculate_bitrate(&ri);
4035         if (WARN_ONCE(!rate,
4036                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4037                       (unsigned long long)status->flag, status->rate_idx,
4038                       status->nss))
4039                 return 0;
4040
4041         /* rewind from end of MPDU */
4042         if (status->flag & RX_FLAG_MACTIME_END)
4043                 ts -= mpdu_len * 8 * 10 / rate;
4044
4045         ts += mpdu_offset * 8 * 10 / rate;
4046
4047         return ts;
4048 }
4049
4050 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4051 {
4052         struct ieee80211_sub_if_data *sdata;
4053         struct cfg80211_chan_def chandef;
4054
4055         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4056         lockdep_assert_wiphy(local->hw.wiphy);
4057
4058         mutex_lock(&local->mtx);
4059         list_for_each_entry(sdata, &local->interfaces, list) {
4060                 /* it might be waiting for the local->mtx, but then
4061                  * by the time it gets it, sdata->wdev.cac_started
4062                  * will no longer be true
4063                  */
4064                 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work);
4065
4066                 if (sdata->wdev.cac_started) {
4067                         chandef = sdata->vif.bss_conf.chandef;
4068                         ieee80211_link_release_channel(&sdata->deflink);
4069                         cfg80211_cac_event(sdata->dev,
4070                                            &chandef,
4071                                            NL80211_RADAR_CAC_ABORTED,
4072                                            GFP_KERNEL);
4073                 }
4074         }
4075         mutex_unlock(&local->mtx);
4076 }
4077
4078 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4079 {
4080         struct ieee80211_local *local =
4081                 container_of(work, struct ieee80211_local, radar_detected_work);
4082         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4083         struct ieee80211_chanctx *ctx;
4084         int num_chanctx = 0;
4085
4086         mutex_lock(&local->chanctx_mtx);
4087         list_for_each_entry(ctx, &local->chanctx_list, list) {
4088                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4089                         continue;
4090
4091                 num_chanctx++;
4092                 chandef = ctx->conf.def;
4093         }
4094         mutex_unlock(&local->chanctx_mtx);
4095
4096         wiphy_lock(local->hw.wiphy);
4097         ieee80211_dfs_cac_cancel(local);
4098         wiphy_unlock(local->hw.wiphy);
4099
4100         if (num_chanctx > 1)
4101                 /* XXX: multi-channel is not supported yet */
4102                 WARN_ON(1);
4103         else
4104                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4105 }
4106
4107 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4108 {
4109         struct ieee80211_local *local = hw_to_local(hw);
4110
4111         trace_api_radar_detected(local);
4112
4113         schedule_work(&local->radar_detected_work);
4114 }
4115 EXPORT_SYMBOL(ieee80211_radar_detected);
4116
4117 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4118 {
4119         ieee80211_conn_flags_t ret;
4120         int tmp;
4121
4122         switch (c->width) {
4123         case NL80211_CHAN_WIDTH_20:
4124                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4125                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4126                 break;
4127         case NL80211_CHAN_WIDTH_40:
4128                 c->width = NL80211_CHAN_WIDTH_20;
4129                 c->center_freq1 = c->chan->center_freq;
4130                 ret = IEEE80211_CONN_DISABLE_40MHZ |
4131                       IEEE80211_CONN_DISABLE_VHT;
4132                 break;
4133         case NL80211_CHAN_WIDTH_80:
4134                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4135                 /* n_P40 */
4136                 tmp /= 2;
4137                 /* freq_P40 */
4138                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4139                 c->width = NL80211_CHAN_WIDTH_40;
4140                 ret = IEEE80211_CONN_DISABLE_VHT;
4141                 break;
4142         case NL80211_CHAN_WIDTH_80P80:
4143                 c->center_freq2 = 0;
4144                 c->width = NL80211_CHAN_WIDTH_80;
4145                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4146                       IEEE80211_CONN_DISABLE_160MHZ;
4147                 break;
4148         case NL80211_CHAN_WIDTH_160:
4149                 /* n_P20 */
4150                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4151                 /* n_P80 */
4152                 tmp /= 4;
4153                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4154                 c->width = NL80211_CHAN_WIDTH_80;
4155                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4156                       IEEE80211_CONN_DISABLE_160MHZ;
4157                 break;
4158         case NL80211_CHAN_WIDTH_320:
4159                 /* n_P20 */
4160                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4161                 /* n_P160 */
4162                 tmp /= 8;
4163                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4164                 c->width = NL80211_CHAN_WIDTH_160;
4165                 ret = IEEE80211_CONN_DISABLE_320MHZ;
4166                 break;
4167         default:
4168         case NL80211_CHAN_WIDTH_20_NOHT:
4169                 WARN_ON_ONCE(1);
4170                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4171                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4172                 break;
4173         case NL80211_CHAN_WIDTH_1:
4174         case NL80211_CHAN_WIDTH_2:
4175         case NL80211_CHAN_WIDTH_4:
4176         case NL80211_CHAN_WIDTH_8:
4177         case NL80211_CHAN_WIDTH_16:
4178         case NL80211_CHAN_WIDTH_5:
4179         case NL80211_CHAN_WIDTH_10:
4180                 WARN_ON_ONCE(1);
4181                 /* keep c->width */
4182                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4183                 break;
4184         }
4185
4186         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4187
4188         return ret;
4189 }
4190
4191 /*
4192  * Returns true if smps_mode_new is strictly more restrictive than
4193  * smps_mode_old.
4194  */
4195 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4196                                    enum ieee80211_smps_mode smps_mode_new)
4197 {
4198         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4199                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4200                 return false;
4201
4202         switch (smps_mode_old) {
4203         case IEEE80211_SMPS_STATIC:
4204                 return false;
4205         case IEEE80211_SMPS_DYNAMIC:
4206                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4207         case IEEE80211_SMPS_OFF:
4208                 return smps_mode_new != IEEE80211_SMPS_OFF;
4209         default:
4210                 WARN_ON(1);
4211         }
4212
4213         return false;
4214 }
4215
4216 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4217                               struct cfg80211_csa_settings *csa_settings)
4218 {
4219         struct sk_buff *skb;
4220         struct ieee80211_mgmt *mgmt;
4221         struct ieee80211_local *local = sdata->local;
4222         int freq;
4223         int hdr_len = offsetofend(struct ieee80211_mgmt,
4224                                   u.action.u.chan_switch);
4225         u8 *pos;
4226
4227         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4228             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4229                 return -EOPNOTSUPP;
4230
4231         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4232                             5 + /* channel switch announcement element */
4233                             3 + /* secondary channel offset element */
4234                             5 + /* wide bandwidth channel switch announcement */
4235                             8); /* mesh channel switch parameters element */
4236         if (!skb)
4237                 return -ENOMEM;
4238
4239         skb_reserve(skb, local->tx_headroom);
4240         mgmt = skb_put_zero(skb, hdr_len);
4241         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4242                                           IEEE80211_STYPE_ACTION);
4243
4244         eth_broadcast_addr(mgmt->da);
4245         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4246         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4247                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4248         } else {
4249                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4250                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4251         }
4252         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4253         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4254         pos = skb_put(skb, 5);
4255         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4256         *pos++ = 3;                                             /* IE length */
4257         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4258         freq = csa_settings->chandef.chan->center_freq;
4259         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4260         *pos++ = csa_settings->count;                           /* count */
4261
4262         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4263                 enum nl80211_channel_type ch_type;
4264
4265                 skb_put(skb, 3);
4266                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4267                 *pos++ = 1;                                     /* IE length */
4268                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4269                 if (ch_type == NL80211_CHAN_HT40PLUS)
4270                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4271                 else
4272                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4273         }
4274
4275         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4276                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4277
4278                 skb_put(skb, 8);
4279                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4280                 *pos++ = 6;                                     /* IE length */
4281                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4282                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4283                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4284                 *pos++ |= csa_settings->block_tx ?
4285                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4286                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4287                 pos += 2;
4288                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4289                 pos += 2;
4290         }
4291
4292         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4293             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4294             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4295                 skb_put(skb, 5);
4296                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4297         }
4298
4299         ieee80211_tx_skb(sdata, skb);
4300         return 0;
4301 }
4302
4303 static bool
4304 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4305 {
4306         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4307         int skip;
4308
4309         if (end > 0)
4310                 return false;
4311
4312         /* One shot NOA  */
4313         if (data->count[i] == 1)
4314                 return false;
4315
4316         if (data->desc[i].interval == 0)
4317                 return false;
4318
4319         /* End time is in the past, check for repetitions */
4320         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4321         if (data->count[i] < 255) {
4322                 if (data->count[i] <= skip) {
4323                         data->count[i] = 0;
4324                         return false;
4325                 }
4326
4327                 data->count[i] -= skip;
4328         }
4329
4330         data->desc[i].start += skip * data->desc[i].interval;
4331
4332         return true;
4333 }
4334
4335 static bool
4336 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4337                              s32 *offset)
4338 {
4339         bool ret = false;
4340         int i;
4341
4342         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4343                 s32 cur;
4344
4345                 if (!data->count[i])
4346                         continue;
4347
4348                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4349                         ret = true;
4350
4351                 cur = data->desc[i].start - tsf;
4352                 if (cur > *offset)
4353                         continue;
4354
4355                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4356                 if (cur > *offset)
4357                         *offset = cur;
4358         }
4359
4360         return ret;
4361 }
4362
4363 static u32
4364 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4365 {
4366         s32 offset = 0;
4367         int tries = 0;
4368         /*
4369          * arbitrary limit, used to avoid infinite loops when combined NoA
4370          * descriptors cover the full time period.
4371          */
4372         int max_tries = 5;
4373
4374         ieee80211_extend_absent_time(data, tsf, &offset);
4375         do {
4376                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4377                         break;
4378
4379                 tries++;
4380         } while (tries < max_tries);
4381
4382         return offset;
4383 }
4384
4385 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4386 {
4387         u32 next_offset = BIT(31) - 1;
4388         int i;
4389
4390         data->absent = 0;
4391         data->has_next_tsf = false;
4392         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4393                 s32 start;
4394
4395                 if (!data->count[i])
4396                         continue;
4397
4398                 ieee80211_extend_noa_desc(data, tsf, i);
4399                 start = data->desc[i].start - tsf;
4400                 if (start <= 0)
4401                         data->absent |= BIT(i);
4402
4403                 if (next_offset > start)
4404                         next_offset = start;
4405
4406                 data->has_next_tsf = true;
4407         }
4408
4409         if (data->absent)
4410                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4411
4412         data->next_tsf = tsf + next_offset;
4413 }
4414 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4415
4416 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4417                             struct ieee80211_noa_data *data, u32 tsf)
4418 {
4419         int ret = 0;
4420         int i;
4421
4422         memset(data, 0, sizeof(*data));
4423
4424         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4425                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4426
4427                 if (!desc->count || !desc->duration)
4428                         continue;
4429
4430                 data->count[i] = desc->count;
4431                 data->desc[i].start = le32_to_cpu(desc->start_time);
4432                 data->desc[i].duration = le32_to_cpu(desc->duration);
4433                 data->desc[i].interval = le32_to_cpu(desc->interval);
4434
4435                 if (data->count[i] > 1 &&
4436                     data->desc[i].interval < data->desc[i].duration)
4437                         continue;
4438
4439                 ieee80211_extend_noa_desc(data, tsf, i);
4440                 ret++;
4441         }
4442
4443         if (ret)
4444                 ieee80211_update_p2p_noa(data, tsf);
4445
4446         return ret;
4447 }
4448 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4449
4450 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4451                            struct ieee80211_sub_if_data *sdata)
4452 {
4453         u64 tsf = drv_get_tsf(local, sdata);
4454         u64 dtim_count = 0;
4455         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4456         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4457         struct ps_data *ps;
4458         u8 bcns_from_dtim;
4459
4460         if (tsf == -1ULL || !beacon_int || !dtim_period)
4461                 return;
4462
4463         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4464             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4465                 if (!sdata->bss)
4466                         return;
4467
4468                 ps = &sdata->bss->ps;
4469         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4470                 ps = &sdata->u.mesh.ps;
4471         } else {
4472                 return;
4473         }
4474
4475         /*
4476          * actually finds last dtim_count, mac80211 will update in
4477          * __beacon_add_tim().
4478          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4479          */
4480         do_div(tsf, beacon_int);
4481         bcns_from_dtim = do_div(tsf, dtim_period);
4482         /* just had a DTIM */
4483         if (!bcns_from_dtim)
4484                 dtim_count = 0;
4485         else
4486                 dtim_count = dtim_period - bcns_from_dtim;
4487
4488         ps->dtim_count = dtim_count;
4489 }
4490
4491 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4492                                          struct ieee80211_chanctx *ctx)
4493 {
4494         struct ieee80211_link_data *link;
4495         u8 radar_detect = 0;
4496
4497         lockdep_assert_held(&local->chanctx_mtx);
4498
4499         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4500                 return 0;
4501
4502         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4503                 if (link->reserved_radar_required)
4504                         radar_detect |= BIT(link->reserved_chandef.width);
4505
4506         /*
4507          * An in-place reservation context should not have any assigned vifs
4508          * until it replaces the other context.
4509          */
4510         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4511                 !list_empty(&ctx->assigned_links));
4512
4513         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4514                 if (!link->radar_required)
4515                         continue;
4516
4517                 radar_detect |=
4518                         BIT(link->conf->chandef.width);
4519         }
4520
4521         return radar_detect;
4522 }
4523
4524 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4525                                  const struct cfg80211_chan_def *chandef,
4526                                  enum ieee80211_chanctx_mode chanmode,
4527                                  u8 radar_detect)
4528 {
4529         struct ieee80211_local *local = sdata->local;
4530         struct ieee80211_sub_if_data *sdata_iter;
4531         enum nl80211_iftype iftype = sdata->wdev.iftype;
4532         struct ieee80211_chanctx *ctx;
4533         int total = 1;
4534         struct iface_combination_params params = {
4535                 .radar_detect = radar_detect,
4536         };
4537
4538         lockdep_assert_held(&local->chanctx_mtx);
4539
4540         if (WARN_ON(hweight32(radar_detect) > 1))
4541                 return -EINVAL;
4542
4543         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4544                     !chandef->chan))
4545                 return -EINVAL;
4546
4547         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4548                 return -EINVAL;
4549
4550         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4551             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4552                 /*
4553                  * always passing this is harmless, since it'll be the
4554                  * same value that cfg80211 finds if it finds the same
4555                  * interface ... and that's always allowed
4556                  */
4557                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4558         }
4559
4560         /* Always allow software iftypes */
4561         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4562                 if (radar_detect)
4563                         return -EINVAL;
4564                 return 0;
4565         }
4566
4567         if (chandef)
4568                 params.num_different_channels = 1;
4569
4570         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4571                 params.iftype_num[iftype] = 1;
4572
4573         list_for_each_entry(ctx, &local->chanctx_list, list) {
4574                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4575                         continue;
4576                 params.radar_detect |=
4577                         ieee80211_chanctx_radar_detect(local, ctx);
4578                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4579                         params.num_different_channels++;
4580                         continue;
4581                 }
4582                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4583                     cfg80211_chandef_compatible(chandef,
4584                                                 &ctx->conf.def))
4585                         continue;
4586                 params.num_different_channels++;
4587         }
4588
4589         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4590                 struct wireless_dev *wdev_iter;
4591
4592                 wdev_iter = &sdata_iter->wdev;
4593
4594                 if (sdata_iter == sdata ||
4595                     !ieee80211_sdata_running(sdata_iter) ||
4596                     cfg80211_iftype_allowed(local->hw.wiphy,
4597                                             wdev_iter->iftype, 0, 1))
4598                         continue;
4599
4600                 params.iftype_num[wdev_iter->iftype]++;
4601                 total++;
4602         }
4603
4604         if (total == 1 && !params.radar_detect)
4605                 return 0;
4606
4607         return cfg80211_check_combinations(local->hw.wiphy, &params);
4608 }
4609
4610 static void
4611 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4612                          void *data)
4613 {
4614         u32 *max_num_different_channels = data;
4615
4616         *max_num_different_channels = max(*max_num_different_channels,
4617                                           c->num_different_channels);
4618 }
4619
4620 int ieee80211_max_num_channels(struct ieee80211_local *local)
4621 {
4622         struct ieee80211_sub_if_data *sdata;
4623         struct ieee80211_chanctx *ctx;
4624         u32 max_num_different_channels = 1;
4625         int err;
4626         struct iface_combination_params params = {0};
4627
4628         lockdep_assert_held(&local->chanctx_mtx);
4629
4630         list_for_each_entry(ctx, &local->chanctx_list, list) {
4631                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4632                         continue;
4633
4634                 params.num_different_channels++;
4635
4636                 params.radar_detect |=
4637                         ieee80211_chanctx_radar_detect(local, ctx);
4638         }
4639
4640         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4641                 params.iftype_num[sdata->wdev.iftype]++;
4642
4643         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4644                                          ieee80211_iter_max_chans,
4645                                          &max_num_different_channels);
4646         if (err < 0)
4647                 return err;
4648
4649         return max_num_different_channels;
4650 }
4651
4652 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4653                                 struct ieee80211_sta_s1g_cap *caps,
4654                                 struct sk_buff *skb)
4655 {
4656         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4657         struct ieee80211_s1g_cap s1g_capab;
4658         u8 *pos;
4659         int i;
4660
4661         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4662                 return;
4663
4664         if (!caps->s1g)
4665                 return;
4666
4667         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4668         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4669
4670         /* override the capability info */
4671         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4672                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4673
4674                 s1g_capab.capab_info[i] &= ~mask;
4675                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4676         }
4677
4678         /* then MCS and NSS set */
4679         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4680                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4681
4682                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4683                 s1g_capab.supp_mcs_nss[i] |=
4684                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4685         }
4686
4687         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4688         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4689         *pos++ = sizeof(s1g_capab);
4690
4691         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4692 }
4693
4694 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4695                                   struct sk_buff *skb)
4696 {
4697         u8 *pos = skb_put(skb, 3);
4698
4699         *pos++ = WLAN_EID_AID_REQUEST;
4700         *pos++ = 1;
4701         *pos++ = 0;
4702 }
4703
4704 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4705 {
4706         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4707         *buf++ = 7; /* len */
4708         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4709         *buf++ = 0x50;
4710         *buf++ = 0xf2;
4711         *buf++ = 2; /* WME */
4712         *buf++ = 0; /* WME info */
4713         *buf++ = 1; /* WME ver */
4714         *buf++ = qosinfo; /* U-APSD no in use */
4715
4716         return buf;
4717 }
4718
4719 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4720                              unsigned long *frame_cnt,
4721                              unsigned long *byte_cnt)
4722 {
4723         struct txq_info *txqi = to_txq_info(txq);
4724         u32 frag_cnt = 0, frag_bytes = 0;
4725         struct sk_buff *skb;
4726
4727         skb_queue_walk(&txqi->frags, skb) {
4728                 frag_cnt++;
4729                 frag_bytes += skb->len;
4730         }
4731
4732         if (frame_cnt)
4733                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4734
4735         if (byte_cnt)
4736                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4737 }
4738 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4739
4740 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4741         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4742         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4743         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4744         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4745 };
4746
4747 u16 ieee80211_encode_usf(int listen_interval)
4748 {
4749         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4750         u16 ui, usf = 0;
4751
4752         /* find greatest USF */
4753         while (usf < IEEE80211_MAX_USF) {
4754                 if (listen_interval % listen_int_usf[usf + 1])
4755                         break;
4756                 usf += 1;
4757         }
4758         ui = listen_interval / listen_int_usf[usf];
4759
4760         /* error if there is a remainder. Should've been checked by user */
4761         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4762         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4763                           FIELD_PREP(LISTEN_INT_UI, ui);
4764
4765         return (u16) listen_interval;
4766 }
4767
4768 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4769 {
4770         const struct ieee80211_sta_he_cap *he_cap;
4771         const struct ieee80211_sta_eht_cap *eht_cap;
4772         struct ieee80211_supported_band *sband;
4773         u8 n;
4774
4775         sband = ieee80211_get_sband(sdata);
4776         if (!sband)
4777                 return 0;
4778
4779         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4780         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4781         if (!he_cap || !eht_cap)
4782                 return 0;
4783
4784         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4785                                        &eht_cap->eht_cap_elem);
4786         return 2 + 1 +
4787                sizeof(he_cap->he_cap_elem) + n +
4788                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4789                                       eht_cap->eht_cap_elem.phy_cap_info);
4790         return 0;
4791 }
4792
4793 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
4794                                const struct ieee80211_sta_he_cap *he_cap,
4795                                const struct ieee80211_sta_eht_cap *eht_cap,
4796                                u8 *end)
4797 {
4798         u8 mcs_nss_len, ppet_len;
4799         u8 ie_len;
4800         u8 *orig_pos = pos;
4801
4802         /* Make sure we have place for the IE */
4803         if (!he_cap || !eht_cap)
4804                 return orig_pos;
4805
4806         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4807                                                  &eht_cap->eht_cap_elem);
4808         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4809                                           eht_cap->eht_cap_elem.phy_cap_info);
4810
4811         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4812         if ((end - pos) < ie_len)
4813                 return orig_pos;
4814
4815         *pos++ = WLAN_EID_EXTENSION;
4816         *pos++ = ie_len - 2;
4817         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
4818
4819         /* Fixed data */
4820         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
4821         pos += sizeof(eht_cap->eht_cap_elem);
4822
4823         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4824         pos += mcs_nss_len;
4825
4826         if (ppet_len) {
4827                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
4828                 pos += ppet_len;
4829         }
4830
4831         return pos;
4832 }
4833
4834 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
4835 {
4836         unsigned int elem_len;
4837
4838         if (!len_pos)
4839                 return;
4840
4841         elem_len = skb->data + skb->len - len_pos - 1;
4842
4843         while (elem_len > 255) {
4844                 /* this one is 255 */
4845                 *len_pos = 255;
4846                 /* remaining data gets smaller */
4847                 elem_len -= 255;
4848                 /* make space for the fragment ID/len in SKB */
4849                 skb_put(skb, 2);
4850                 /* shift back the remaining data to place fragment ID/len */
4851                 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
4852                 /* place the fragment ID */
4853                 len_pos += 255 + 1;
4854                 *len_pos = WLAN_EID_FRAGMENT;
4855                 /* and point to fragment length to update later */
4856                 len_pos++;
4857         }
4858
4859         *len_pos = elem_len;
4860 }