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         sdata->vif.txqs_stopped[ac] = false;
 305
 306         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 307                 goto out;
 308
 309         if (sdata->vif.type == NL80211_IFTYPE_AP)
 310                 ps = &sdata->bss->ps;
 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
 958 ieee80211_parse_extension_element(u32 *crc,
 959                                   const struct element *elem,
 960                                   struct ieee802_11_elems *elems,
 961                                   struct ieee80211_elems_parse_params *params)
 962 {
 963         const void *data = elem->data + 1;
 964         u8 len;
 965
 966         if (!elem->datalen)
 967                 return;
 968
 969         len = elem->datalen - 1;
 970
 971         switch (elem->data[0]) {
 972         case WLAN_EID_EXT_HE_MU_EDCA:
 973                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 974                         elems->mu_edca_param_set = data;
 975                         if (crc)
 976                                 *crc = crc32_be(*crc, (void *)elem,
 977                                                 elem->datalen + 2);
 978                 }
 979                 break;
 980         case WLAN_EID_EXT_HE_CAPABILITY:
 981                 if (ieee80211_he_capa_size_ok(data, len)) {
 982                         elems->he_cap = data;
 983                         elems->he_cap_len = len;
 984                 }
 985                 break;
 986         case WLAN_EID_EXT_HE_OPERATION:
 987                 if (len >= sizeof(*elems->he_operation) &&
 988                     len >= ieee80211_he_oper_size(data) - 1) {
 989                         if (crc)
 990                                 *crc = crc32_be(*crc, (void *)elem,
 991                                                 elem->datalen + 2);
 992                         elems->he_operation = data;
 993                 }
 994                 break;
 995         case WLAN_EID_EXT_UORA:
 996                 if (len >= 1)
 997                         elems->uora_element = data;
 998                 break;
 999         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
1000                 if (len == 3)
1001                         elems->max_channel_switch_time = data;
1002                 break;
1003         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
1004                 if (len >= sizeof(*elems->mbssid_config_ie))
1005                         elems->mbssid_config_ie = data;
1006                 break;
1007         case WLAN_EID_EXT_HE_SPR:
1008                 if (len >= sizeof(*elems->he_spr) &&
1009                     len >= ieee80211_he_spr_size(data))
1010                         elems->he_spr = data;
1011                 break;
1012         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1013                 if (len >= sizeof(*elems->he_6ghz_capa))
1014                         elems->he_6ghz_capa = data;
1015                 break;
1016         case WLAN_EID_EXT_EHT_CAPABILITY:
1017                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
1018                                                data, len,
1019                                                params->from_ap)) {
1020                         elems->eht_cap = data;
1021                         elems->eht_cap_len = len;
1022                 }
1023                 break;
1024         case WLAN_EID_EXT_EHT_OPERATION:
1025                 if (ieee80211_eht_oper_size_ok(data, len))
1026                         elems->eht_operation = data;
1027                 break;
1028         case WLAN_EID_EXT_EHT_MULTI_LINK:
1029                 if (ieee80211_mle_size_ok(data, len))
1030                         elems->multi_link = (void *)data;
1031                 break;
1032         }
1033 }
1034
1035 static u32
1036 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
1037                              struct ieee802_11_elems *elems,
1038                              const struct element *check_inherit)
1039 {
1040         const struct element *elem;
1041         bool calc_crc = params->filter != 0;
1042         DECLARE_BITMAP(seen_elems, 256);
1043         u32 crc = params->crc;
1044         const u8 *ie;
1045
1046         bitmap_zero(seen_elems, 256);
1047
1048         for_each_element(elem, params->start, params->len) {
1049                 bool elem_parse_failed;
1050                 u8 id = elem->id;
1051                 u8 elen = elem->datalen;
1052                 const u8 *pos = elem->data;
1053
1054                 if (check_inherit &&
1055                     !cfg80211_is_element_inherited(elem,
1056                                                    check_inherit))
1057                         continue;
1058
1059                 switch (id) {
1060                 case WLAN_EID_SSID:
1061                 case WLAN_EID_SUPP_RATES:
1062                 case WLAN_EID_FH_PARAMS:
1063                 case WLAN_EID_DS_PARAMS:
1064                 case WLAN_EID_CF_PARAMS:
1065                 case WLAN_EID_TIM:
1066                 case WLAN_EID_IBSS_PARAMS:
1067                 case WLAN_EID_CHALLENGE:
1068                 case WLAN_EID_RSN:
1069                 case WLAN_EID_ERP_INFO:
1070                 case WLAN_EID_EXT_SUPP_RATES:
1071                 case WLAN_EID_HT_CAPABILITY:
1072                 case WLAN_EID_HT_OPERATION:
1073                 case WLAN_EID_VHT_CAPABILITY:
1074                 case WLAN_EID_VHT_OPERATION:
1075                 case WLAN_EID_MESH_ID:
1076                 case WLAN_EID_MESH_CONFIG:
1077                 case WLAN_EID_PEER_MGMT:
1078                 case WLAN_EID_PREQ:
1079                 case WLAN_EID_PREP:
1080                 case WLAN_EID_PERR:
1081                 case WLAN_EID_RANN:
1082                 case WLAN_EID_CHANNEL_SWITCH:
1083                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1084                 case WLAN_EID_COUNTRY:
1085                 case WLAN_EID_PWR_CONSTRAINT:
1086                 case WLAN_EID_TIMEOUT_INTERVAL:
1087                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1088                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1089                 case WLAN_EID_CHAN_SWITCH_PARAM:
1090                 case WLAN_EID_EXT_CAPABILITY:
1091                 case WLAN_EID_CHAN_SWITCH_TIMING:
1092                 case WLAN_EID_LINK_ID:
1093                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1094                 case WLAN_EID_RSNX:
1095                 case WLAN_EID_S1G_BCN_COMPAT:
1096                 case WLAN_EID_S1G_CAPABILITIES:
1097                 case WLAN_EID_S1G_OPERATION:
1098                 case WLAN_EID_AID_RESPONSE:
1099                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1100                 /*
1101                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1102                  * that if the content gets bigger it might be needed more than once
1103                  */
1104                         if (test_bit(id, seen_elems)) {
1105                                 elems->parse_error = true;
1106                                 continue;
1107                         }
1108                         break;
1109                 }
1110
1111                 if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1112                         crc = crc32_be(crc, pos - 2, elen + 2);
1113
1114                 elem_parse_failed = false;
1115
1116                 switch (id) {
1117                 case WLAN_EID_LINK_ID:
1118                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1119                                 elem_parse_failed = true;
1120                                 break;
1121                         }
1122                         elems->lnk_id = (void *)(pos - 2);
1123                         break;
1124                 case WLAN_EID_CHAN_SWITCH_TIMING:
1125                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1126                                 elem_parse_failed = true;
1127                                 break;
1128                         }
1129                         elems->ch_sw_timing = (void *)pos;
1130                         break;
1131                 case WLAN_EID_EXT_CAPABILITY:
1132                         elems->ext_capab = pos;
1133                         elems->ext_capab_len = elen;
1134                         break;
1135                 case WLAN_EID_SSID:
1136                         elems->ssid = pos;
1137                         elems->ssid_len = elen;
1138                         break;
1139                 case WLAN_EID_SUPP_RATES:
1140                         elems->supp_rates = pos;
1141                         elems->supp_rates_len = elen;
1142                         break;
1143                 case WLAN_EID_DS_PARAMS:
1144                         if (elen >= 1)
1145                                 elems->ds_params = pos;
1146                         else
1147                                 elem_parse_failed = true;
1148                         break;
1149                 case WLAN_EID_TIM:
1150                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1151                                 elems->tim = (void *)pos;
1152                                 elems->tim_len = elen;
1153                         } else
1154                                 elem_parse_failed = true;
1155                         break;
1156                 case WLAN_EID_VENDOR_SPECIFIC:
1157                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1158                             pos[2] == 0xf2) {
1159                                 /* Microsoft OUI (00:50:F2) */
1160
1161                                 if (calc_crc)
1162                                         crc = crc32_be(crc, pos - 2, elen + 2);
1163
1164                                 if (elen >= 5 && pos[3] == 2) {
1165                                         /* OUI Type 2 - WMM IE */
1166                                         if (pos[4] == 0) {
1167                                                 elems->wmm_info = pos;
1168                                                 elems->wmm_info_len = elen;
1169                                         } else if (pos[4] == 1) {
1170                                                 elems->wmm_param = pos;
1171                                                 elems->wmm_param_len = elen;
1172                                         }
1173                                 }
1174                         }
1175                         break;
1176                 case WLAN_EID_RSN:
1177                         elems->rsn = pos;
1178                         elems->rsn_len = elen;
1179                         break;
1180                 case WLAN_EID_ERP_INFO:
1181                         if (elen >= 1)
1182                                 elems->erp_info = pos;
1183                         else
1184                                 elem_parse_failed = true;
1185                         break;
1186                 case WLAN_EID_EXT_SUPP_RATES:
1187                         elems->ext_supp_rates = pos;
1188                         elems->ext_supp_rates_len = elen;
1189                         break;
1190                 case WLAN_EID_HT_CAPABILITY:
1191                         if (elen >= sizeof(struct ieee80211_ht_cap))
1192                                 elems->ht_cap_elem = (void *)pos;
1193                         else
1194                                 elem_parse_failed = true;
1195                         break;
1196                 case WLAN_EID_HT_OPERATION:
1197                         if (elen >= sizeof(struct ieee80211_ht_operation))
1198                                 elems->ht_operation = (void *)pos;
1199                         else
1200                                 elem_parse_failed = true;
1201                         break;
1202                 case WLAN_EID_VHT_CAPABILITY:
1203                         if (elen >= sizeof(struct ieee80211_vht_cap))
1204                                 elems->vht_cap_elem = (void *)pos;
1205                         else
1206                                 elem_parse_failed = true;
1207                         break;
1208                 case WLAN_EID_VHT_OPERATION:
1209                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1210                                 elems->vht_operation = (void *)pos;
1211                                 if (calc_crc)
1212                                         crc = crc32_be(crc, pos - 2, elen + 2);
1213                                 break;
1214                         }
1215                         elem_parse_failed = true;
1216                         break;
1217                 case WLAN_EID_OPMODE_NOTIF:
1218                         if (elen > 0) {
1219                                 elems->opmode_notif = pos;
1220                                 if (calc_crc)
1221                                         crc = crc32_be(crc, pos - 2, elen + 2);
1222                                 break;
1223                         }
1224                         elem_parse_failed = true;
1225                         break;
1226                 case WLAN_EID_MESH_ID:
1227                         elems->mesh_id = pos;
1228                         elems->mesh_id_len = elen;
1229                         break;
1230                 case WLAN_EID_MESH_CONFIG:
1231                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1232                                 elems->mesh_config = (void *)pos;
1233                         else
1234                                 elem_parse_failed = true;
1235                         break;
1236                 case WLAN_EID_PEER_MGMT:
1237                         elems->peering = pos;
1238                         elems->peering_len = elen;
1239                         break;
1240                 case WLAN_EID_MESH_AWAKE_WINDOW:
1241                         if (elen >= 2)
1242                                 elems->awake_window = (void *)pos;
1243                         break;
1244                 case WLAN_EID_PREQ:
1245                         elems->preq = pos;
1246                         elems->preq_len = elen;
1247                         break;
1248                 case WLAN_EID_PREP:
1249                         elems->prep = pos;
1250                         elems->prep_len = elen;
1251                         break;
1252                 case WLAN_EID_PERR:
1253                         elems->perr = pos;
1254                         elems->perr_len = elen;
1255                         break;
1256                 case WLAN_EID_RANN:
1257                         if (elen >= sizeof(struct ieee80211_rann_ie))
1258                                 elems->rann = (void *)pos;
1259                         else
1260                                 elem_parse_failed = true;
1261                         break;
1262                 case WLAN_EID_CHANNEL_SWITCH:
1263                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1264                                 elem_parse_failed = true;
1265                                 break;
1266                         }
1267                         elems->ch_switch_ie = (void *)pos;
1268                         break;
1269                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1270                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1271                                 elem_parse_failed = true;
1272                                 break;
1273                         }
1274                         elems->ext_chansw_ie = (void *)pos;
1275                         break;
1276                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1277                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1278                                 elem_parse_failed = true;
1279                                 break;
1280                         }
1281                         elems->sec_chan_offs = (void *)pos;
1282                         break;
1283                 case WLAN_EID_CHAN_SWITCH_PARAM:
1284                         if (elen <
1285                             sizeof(*elems->mesh_chansw_params_ie)) {
1286                                 elem_parse_failed = true;
1287                                 break;
1288                         }
1289                         elems->mesh_chansw_params_ie = (void *)pos;
1290                         break;
1291                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1292                         if (!params->action ||
1293                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1294                                 elem_parse_failed = true;
1295                                 break;
1296                         }
1297                         elems->wide_bw_chansw_ie = (void *)pos;
1298                         break;
1299                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1300                         if (params->action) {
1301                                 elem_parse_failed = true;
1302                                 break;
1303                         }
1304                         /*
1305                          * This is a bit tricky, but as we only care about
1306                          * the wide bandwidth channel switch element, so
1307                          * just parse it out manually.
1308                          */
1309                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1310                                               pos, elen);
1311                         if (ie) {
1312                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1313                                         elems->wide_bw_chansw_ie =
1314                                                 (void *)(ie + 2);
1315                                 else
1316                                         elem_parse_failed = true;
1317                         }
1318                         break;
1319                 case WLAN_EID_COUNTRY:
1320                         elems->country_elem = pos;
1321                         elems->country_elem_len = elen;
1322                         break;
1323                 case WLAN_EID_PWR_CONSTRAINT:
1324                         if (elen != 1) {
1325                                 elem_parse_failed = true;
1326                                 break;
1327                         }
1328                         elems->pwr_constr_elem = pos;
1329                         break;
1330                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1331                         /* Lots of different options exist, but we only care
1332                          * about the Dynamic Transmit Power Control element.
1333                          * First check for the Cisco OUI, then for the DTPC
1334                          * tag (0x00).
1335                          */
1336                         if (elen < 4) {
1337                                 elem_parse_failed = true;
1338                                 break;
1339                         }
1340
1341                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1342                             pos[2] != 0x96 || pos[3] != 0x00)
1343                                 break;
1344
1345                         if (elen != 6) {
1346                                 elem_parse_failed = true;
1347                                 break;
1348                         }
1349
1350                         if (calc_crc)
1351                                 crc = crc32_be(crc, pos - 2, elen + 2);
1352
1353                         elems->cisco_dtpc_elem = pos;
1354                         break;
1355                 case WLAN_EID_ADDBA_EXT:
1356                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1357                                 elem_parse_failed = true;
1358                                 break;
1359                         }
1360                         elems->addba_ext_ie = (void *)pos;
1361                         break;
1362                 case WLAN_EID_TIMEOUT_INTERVAL:
1363                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1364                                 elems->timeout_int = (void *)pos;
1365                         else
1366                                 elem_parse_failed = true;
1367                         break;
1368                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1369                         if (elen >= sizeof(*elems->max_idle_period_ie))
1370                                 elems->max_idle_period_ie = (void *)pos;
1371                         break;
1372                 case WLAN_EID_RSNX:
1373                         elems->rsnx = pos;
1374                         elems->rsnx_len = elen;
1375                         break;
1376                 case WLAN_EID_TX_POWER_ENVELOPE:
1377                         if (elen < 1 ||
1378                             elen > sizeof(struct ieee80211_tx_pwr_env))
1379                                 break;
1380
1381                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1382                                 break;
1383
1384                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1385                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1386                         elems->tx_pwr_env_num++;
1387                         break;
1388                 case WLAN_EID_EXTENSION:
1389                         ieee80211_parse_extension_element(calc_crc ?
1390                                                                 &crc : NULL,
1391                                                           elem, elems, params);
1392                         break;
1393                 case WLAN_EID_S1G_CAPABILITIES:
1394                         if (elen >= sizeof(*elems->s1g_capab))
1395                                 elems->s1g_capab = (void *)pos;
1396                         else
1397                                 elem_parse_failed = true;
1398                         break;
1399                 case WLAN_EID_S1G_OPERATION:
1400                         if (elen == sizeof(*elems->s1g_oper))
1401                                 elems->s1g_oper = (void *)pos;
1402                         else
1403                                 elem_parse_failed = true;
1404                         break;
1405                 case WLAN_EID_S1G_BCN_COMPAT:
1406                         if (elen == sizeof(*elems->s1g_bcn_compat))
1407                                 elems->s1g_bcn_compat = (void *)pos;
1408                         else
1409                                 elem_parse_failed = true;
1410                         break;
1411                 case WLAN_EID_AID_RESPONSE:
1412                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1413                                 elems->aid_resp = (void *)pos;
1414                         else
1415                                 elem_parse_failed = true;
1416                         break;
1417                 default:
1418                         break;
1419                 }
1420
1421                 if (elem_parse_failed)
1422                         elems->parse_error = true;
1423                 else
1424                         __set_bit(id, seen_elems);
1425         }
1426
1427         if (!for_each_element_completed(elem, params->start, params->len))
1428                 elems->parse_error = true;
1429
1430         return crc;
1431 }
1432
1433 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1434                                             struct ieee802_11_elems *elems,
1435                                             struct cfg80211_bss *bss,
1436                                             u8 *nontransmitted_profile)
1437 {
1438         const struct element *elem, *sub;
1439         size_t profile_len = 0;
1440         bool found = false;
1441
1442         if (!bss || !bss->transmitted_bss)
1443                 return profile_len;
1444
1445         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1446                 if (elem->datalen < 2)
1447                         continue;
1448
1449                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1450                         u8 new_bssid[ETH_ALEN];
1451                         const u8 *index;
1452
1453                         if (sub->id != 0 || sub->datalen < 4) {
1454                                 /* not a valid BSS profile */
1455                                 continue;
1456                         }
1457
1458                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1459                             sub->data[1] != 2) {
1460                                 /* The first element of the
1461                                  * Nontransmitted BSSID Profile is not
1462                                  * the Nontransmitted BSSID Capability
1463                                  * element.
1464                                  */
1465                                 continue;
1466                         }
1467
1468                         memset(nontransmitted_profile, 0, len);
1469                         profile_len = cfg80211_merge_profile(start, len,
1470                                                              elem,
1471                                                              sub,
1472                                                              nontransmitted_profile,
1473                                                              len);
1474
1475                         /* found a Nontransmitted BSSID Profile */
1476                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1477                                                  nontransmitted_profile,
1478                                                  profile_len);
1479                         if (!index || index[1] < 1 || index[2] == 0) {
1480                                 /* Invalid MBSSID Index element */
1481                                 continue;
1482                         }
1483
1484                         cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1485                                                elem->data[0],
1486                                                index[2],
1487                                                new_bssid);
1488                         if (ether_addr_equal(new_bssid, bss->bssid)) {
1489                                 found = true;
1490                                 elems->bssid_index_len = index[1];
1491                                 elems->bssid_index = (void *)&index[2];
1492                                 break;
1493                         }
1494                 }
1495         }
1496
1497         return found ? profile_len : 0;
1498 }
1499
1500 struct ieee802_11_elems *
1501 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1502 {
1503         struct ieee802_11_elems *elems;
1504         const struct element *non_inherit = NULL;
1505         u8 *nontransmitted_profile;
1506         int nontransmitted_profile_len = 0;
1507
1508         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1509         if (!elems)
1510                 return NULL;
1511         elems->ie_start = params->start;
1512         elems->total_len = params->len;
1513
1514         nontransmitted_profile = kmalloc(params->len, GFP_ATOMIC);
1515         if (nontransmitted_profile) {
1516                 nontransmitted_profile_len =
1517                         ieee802_11_find_bssid_profile(params->start, params->len,
1518                                                       elems, params->bss,
1519                                                       nontransmitted_profile);
1520                 non_inherit =
1521                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1522                                                nontransmitted_profile,
1523                                                nontransmitted_profile_len);
1524         }
1525
1526         elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1527
1528         /* Override with nontransmitted profile, if found */
1529         if (nontransmitted_profile_len) {
1530                 struct ieee80211_elems_parse_params sub = {
1531                         .start = nontransmitted_profile,
1532                         .len = nontransmitted_profile_len,
1533                         .action = params->action,
1534                         .link_id = params->link_id,
1535                 };
1536
1537                 _ieee802_11_parse_elems_full(&sub, elems, NULL);
1538         }
1539
1540         if (elems->tim && !elems->parse_error) {
1541                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1542
1543                 elems->dtim_period = tim_ie->dtim_period;
1544                 elems->dtim_count = tim_ie->dtim_count;
1545         }
1546
1547         /* Override DTIM period and count if needed */
1548         if (elems->bssid_index &&
1549             elems->bssid_index_len >=
1550             offsetofend(struct ieee80211_bssid_index, dtim_period))
1551                 elems->dtim_period = elems->bssid_index->dtim_period;
1552
1553         if (elems->bssid_index &&
1554             elems->bssid_index_len >=
1555             offsetofend(struct ieee80211_bssid_index, dtim_count))
1556                 elems->dtim_count = elems->bssid_index->dtim_count;
1557
1558         kfree(nontransmitted_profile);
1559
1560         return elems;
1561 }
1562
1563 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1564                                            struct ieee80211_tx_queue_params
1565                                            *qparam, int ac)
1566 {
1567         struct ieee80211_chanctx_conf *chanctx_conf;
1568         const struct ieee80211_reg_rule *rrule;
1569         const struct ieee80211_wmm_ac *wmm_ac;
1570         u16 center_freq = 0;
1571
1572         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1573             sdata->vif.type != NL80211_IFTYPE_STATION)
1574                 return;
1575
1576         rcu_read_lock();
1577         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1578         if (chanctx_conf)
1579                 center_freq = chanctx_conf->def.chan->center_freq;
1580
1581         if (!center_freq) {
1582                 rcu_read_unlock();
1583                 return;
1584         }
1585
1586         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1587
1588         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1589                 rcu_read_unlock();
1590                 return;
1591         }
1592
1593         if (sdata->vif.type == NL80211_IFTYPE_AP)
1594                 wmm_ac = &rrule->wmm_rule.ap[ac];
1595         else
1596                 wmm_ac = &rrule->wmm_rule.client[ac];
1597         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1598         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1599         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1600         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1601         rcu_read_unlock();
1602 }
1603
1604 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1605                                bool bss_notify, bool enable_qos)
1606 {
1607         struct ieee80211_sub_if_data *sdata = link->sdata;
1608         struct ieee80211_local *local = sdata->local;
1609         struct ieee80211_tx_queue_params qparam;
1610         struct ieee80211_chanctx_conf *chanctx_conf;
1611         int ac;
1612         bool use_11b;
1613         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1614         int aCWmin, aCWmax;
1615
1616         if (!local->ops->conf_tx)
1617                 return;
1618
1619         if (local->hw.queues < IEEE80211_NUM_ACS)
1620                 return;
1621
1622         memset(&qparam, 0, sizeof(qparam));
1623
1624         rcu_read_lock();
1625         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1626         use_11b = (chanctx_conf &&
1627                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1628                  !link->operating_11g_mode;
1629         rcu_read_unlock();
1630
1631         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1632
1633         /* Set defaults according to 802.11-2007 Table 7-37 */
1634         aCWmax = 1023;
1635         if (use_11b)
1636                 aCWmin = 31;
1637         else
1638                 aCWmin = 15;
1639
1640         /* Confiure old 802.11b/g medium access rules. */
1641         qparam.cw_max = aCWmax;
1642         qparam.cw_min = aCWmin;
1643         qparam.txop = 0;
1644         qparam.aifs = 2;
1645
1646         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1647                 /* Update if QoS is enabled. */
1648                 if (enable_qos) {
1649                         switch (ac) {
1650                         case IEEE80211_AC_BK:
1651                                 qparam.cw_max = aCWmax;
1652                                 qparam.cw_min = aCWmin;
1653                                 qparam.txop = 0;
1654                                 if (is_ocb)
1655                                         qparam.aifs = 9;
1656                                 else
1657                                         qparam.aifs = 7;
1658                                 break;
1659                         /* never happens but let's not leave undefined */
1660                         default:
1661                         case IEEE80211_AC_BE:
1662                                 qparam.cw_max = aCWmax;
1663                                 qparam.cw_min = aCWmin;
1664                                 qparam.txop = 0;
1665                                 if (is_ocb)
1666                                         qparam.aifs = 6;
1667                                 else
1668                                         qparam.aifs = 3;
1669                                 break;
1670                         case IEEE80211_AC_VI:
1671                                 qparam.cw_max = aCWmin;
1672                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1673                                 if (is_ocb)
1674                                         qparam.txop = 0;
1675                                 else if (use_11b)
1676                                         qparam.txop = 6016/32;
1677                                 else
1678                                         qparam.txop = 3008/32;
1679
1680                                 if (is_ocb)
1681                                         qparam.aifs = 3;
1682                                 else
1683                                         qparam.aifs = 2;
1684                                 break;
1685                         case IEEE80211_AC_VO:
1686                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1687                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1688                                 if (is_ocb)
1689                                         qparam.txop = 0;
1690                                 else if (use_11b)
1691                                         qparam.txop = 3264/32;
1692                                 else
1693                                         qparam.txop = 1504/32;
1694                                 qparam.aifs = 2;
1695                                 break;
1696                         }
1697                 }
1698                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1699
1700                 qparam.uapsd = false;
1701
1702                 link->tx_conf[ac] = qparam;
1703                 drv_conf_tx(local, link, ac, &qparam);
1704         }
1705
1706         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1707             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1708             sdata->vif.type != NL80211_IFTYPE_NAN) {
1709                 link->conf->qos = enable_qos;
1710                 if (bss_notify)
1711                         ieee80211_link_info_change_notify(sdata, link,
1712                                                           BSS_CHANGED_QOS);
1713         }
1714 }
1715
1716 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1717                          u16 transaction, u16 auth_alg, u16 status,
1718                          const u8 *extra, size_t extra_len, const u8 *da,
1719                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1720                          u32 tx_flags)
1721 {
1722         struct ieee80211_local *local = sdata->local;
1723         struct sk_buff *skb;
1724         struct ieee80211_mgmt *mgmt;
1725         bool multi_link = sdata->vif.valid_links;
1726         struct {
1727                 u8 id;
1728                 u8 len;
1729                 u8 ext_id;
1730                 struct ieee80211_multi_link_elem ml;
1731                 struct ieee80211_mle_basic_common_info basic;
1732         } __packed mle = {
1733                 .id = WLAN_EID_EXTENSION,
1734                 .len = sizeof(mle) - 2,
1735                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1736                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1737                 .basic.len = sizeof(mle.basic),
1738         };
1739         int err;
1740
1741         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1742
1743         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1744         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1745                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1746                             multi_link * sizeof(mle));
1747         if (!skb)
1748                 return;
1749
1750         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1751
1752         mgmt = skb_put_zero(skb, 24 + 6);
1753         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1754                                           IEEE80211_STYPE_AUTH);
1755         memcpy(mgmt->da, da, ETH_ALEN);
1756         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1757         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1758         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1759         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1760         mgmt->u.auth.status_code = cpu_to_le16(status);
1761         if (extra)
1762                 skb_put_data(skb, extra, extra_len);
1763         if (multi_link)
1764                 skb_put_data(skb, &mle, sizeof(mle));
1765
1766         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1767                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1768                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1769                 if (WARN_ON(err)) {
1770                         kfree_skb(skb);
1771                         return;
1772                 }
1773         }
1774
1775         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1776                                         tx_flags;
1777         ieee80211_tx_skb(sdata, skb);
1778 }
1779
1780 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1781                                     const u8 *da, const u8 *bssid,
1782                                     u16 stype, u16 reason,
1783                                     bool send_frame, u8 *frame_buf)
1784 {
1785         struct ieee80211_local *local = sdata->local;
1786         struct sk_buff *skb;
1787         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1788
1789         /* build frame */
1790         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1791         mgmt->duration = 0; /* initialize only */
1792         mgmt->seq_ctrl = 0; /* initialize only */
1793         memcpy(mgmt->da, da, ETH_ALEN);
1794         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1795         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1796         /* u.deauth.reason_code == u.disassoc.reason_code */
1797         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1798
1799         if (send_frame) {
1800                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1801                                     IEEE80211_DEAUTH_FRAME_LEN);
1802                 if (!skb)
1803                         return;
1804
1805                 skb_reserve(skb, local->hw.extra_tx_headroom);
1806
1807                 /* copy in frame */
1808                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1809
1810                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1811                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1812                         IEEE80211_SKB_CB(skb)->flags |=
1813                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1814
1815                 ieee80211_tx_skb(sdata, skb);
1816         }
1817 }
1818
1819 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1820 {
1821         if ((end - pos) < 5)
1822                 return pos;
1823
1824         *pos++ = WLAN_EID_EXTENSION;
1825         *pos++ = 1 + sizeof(cap);
1826         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1827         memcpy(pos, &cap, sizeof(cap));
1828
1829         return pos + 2;
1830 }
1831
1832 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1833                                          u8 *buffer, size_t buffer_len,
1834                                          const u8 *ie, size_t ie_len,
1835                                          enum nl80211_band band,
1836                                          u32 rate_mask,
1837                                          struct cfg80211_chan_def *chandef,
1838                                          size_t *offset, u32 flags)
1839 {
1840         struct ieee80211_local *local = sdata->local;
1841         struct ieee80211_supported_band *sband;
1842         const struct ieee80211_sta_he_cap *he_cap;
1843         const struct ieee80211_sta_eht_cap *eht_cap;
1844         u8 *pos = buffer, *end = buffer + buffer_len;
1845         size_t noffset;
1846         int supp_rates_len, i;
1847         u8 rates[32];
1848         int num_rates;
1849         int ext_rates_len;
1850         int shift;
1851         u32 rate_flags;
1852         bool have_80mhz = false;
1853
1854         *offset = 0;
1855
1856         sband = local->hw.wiphy->bands[band];
1857         if (WARN_ON_ONCE(!sband))
1858                 return 0;
1859
1860         rate_flags = ieee80211_chandef_rate_flags(chandef);
1861         shift = ieee80211_chandef_get_shift(chandef);
1862
1863         num_rates = 0;
1864         for (i = 0; i < sband->n_bitrates; i++) {
1865                 if ((BIT(i) & rate_mask) == 0)
1866                         continue; /* skip rate */
1867                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1868                         continue;
1869
1870                 rates[num_rates++] =
1871                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1872                                           (1 << shift) * 5);
1873         }
1874
1875         supp_rates_len = min_t(int, num_rates, 8);
1876
1877         if (end - pos < 2 + supp_rates_len)
1878                 goto out_err;
1879         *pos++ = WLAN_EID_SUPP_RATES;
1880         *pos++ = supp_rates_len;
1881         memcpy(pos, rates, supp_rates_len);
1882         pos += supp_rates_len;
1883
1884         /* insert "request information" if in custom IEs */
1885         if (ie && ie_len) {
1886                 static const u8 before_extrates[] = {
1887                         WLAN_EID_SSID,
1888                         WLAN_EID_SUPP_RATES,
1889                         WLAN_EID_REQUEST,
1890                 };
1891                 noffset = ieee80211_ie_split(ie, ie_len,
1892                                              before_extrates,
1893                                              ARRAY_SIZE(before_extrates),
1894                                              *offset);
1895                 if (end - pos < noffset - *offset)
1896                         goto out_err;
1897                 memcpy(pos, ie + *offset, noffset - *offset);
1898                 pos += noffset - *offset;
1899                 *offset = noffset;
1900         }
1901
1902         ext_rates_len = num_rates - supp_rates_len;
1903         if (ext_rates_len > 0) {
1904                 if (end - pos < 2 + ext_rates_len)
1905                         goto out_err;
1906                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1907                 *pos++ = ext_rates_len;
1908                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1909                 pos += ext_rates_len;
1910         }
1911
1912         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1913                 if (end - pos < 3)
1914                         goto out_err;
1915                 *pos++ = WLAN_EID_DS_PARAMS;
1916                 *pos++ = 1;
1917                 *pos++ = ieee80211_frequency_to_channel(
1918                                 chandef->chan->center_freq);
1919         }
1920
1921         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1922                 goto done;
1923
1924         /* insert custom IEs that go before HT */
1925         if (ie && ie_len) {
1926                 static const u8 before_ht[] = {
1927                         /*
1928                          * no need to list the ones split off already
1929                          * (or generated here)
1930                          */
1931                         WLAN_EID_DS_PARAMS,
1932                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1933                 };
1934                 noffset = ieee80211_ie_split(ie, ie_len,
1935                                              before_ht, ARRAY_SIZE(before_ht),
1936                                              *offset);
1937                 if (end - pos < noffset - *offset)
1938                         goto out_err;
1939                 memcpy(pos, ie + *offset, noffset - *offset);
1940                 pos += noffset - *offset;
1941                 *offset = noffset;
1942         }
1943
1944         if (sband->ht_cap.ht_supported) {
1945                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1946                         goto out_err;
1947                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1948                                                 sband->ht_cap.cap);
1949         }
1950
1951         /* insert custom IEs that go before VHT */
1952         if (ie && ie_len) {
1953                 static const u8 before_vht[] = {
1954                         /*
1955                          * no need to list the ones split off already
1956                          * (or generated here)
1957                          */
1958                         WLAN_EID_BSS_COEX_2040,
1959                         WLAN_EID_EXT_CAPABILITY,
1960                         WLAN_EID_SSID_LIST,
1961                         WLAN_EID_CHANNEL_USAGE,
1962                         WLAN_EID_INTERWORKING,
1963                         WLAN_EID_MESH_ID,
1964                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1965                 };
1966                 noffset = ieee80211_ie_split(ie, ie_len,
1967                                              before_vht, ARRAY_SIZE(before_vht),
1968                                              *offset);
1969                 if (end - pos < noffset - *offset)
1970                         goto out_err;
1971                 memcpy(pos, ie + *offset, noffset - *offset);
1972                 pos += noffset - *offset;
1973                 *offset = noffset;
1974         }
1975
1976         /* Check if any channel in this sband supports at least 80 MHz */
1977         for (i = 0; i < sband->n_channels; i++) {
1978                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1979                                                 IEEE80211_CHAN_NO_80MHZ))
1980                         continue;
1981
1982                 have_80mhz = true;
1983                 break;
1984         }
1985
1986         if (sband->vht_cap.vht_supported && have_80mhz) {
1987                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1988                         goto out_err;
1989                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1990                                                  sband->vht_cap.cap);
1991         }
1992
1993         /* insert custom IEs that go before HE */
1994         if (ie && ie_len) {
1995                 static const u8 before_he[] = {
1996                         /*
1997                          * no need to list the ones split off before VHT
1998                          * or generated here
1999                          */
2000                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
2001                         WLAN_EID_AP_CSN,
2002                         /* TODO: add 11ah/11aj/11ak elements */
2003                 };
2004                 noffset = ieee80211_ie_split(ie, ie_len,
2005                                              before_he, ARRAY_SIZE(before_he),
2006                                              *offset);
2007                 if (end - pos < noffset - *offset)
2008                         goto out_err;
2009                 memcpy(pos, ie + *offset, noffset - *offset);
2010                 pos += noffset - *offset;
2011                 *offset = noffset;
2012         }
2013
2014         he_cap = ieee80211_get_he_iftype_cap(sband,
2015                                              ieee80211_vif_type_p2p(&sdata->vif));
2016         if (he_cap &&
2017             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2018                                          IEEE80211_CHAN_NO_HE)) {
2019                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2020                 if (!pos)
2021                         goto out_err;
2022         }
2023
2024         eht_cap = ieee80211_get_eht_iftype_cap(sband,
2025                                                ieee80211_vif_type_p2p(&sdata->vif));
2026
2027         if (eht_cap &&
2028             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2029                                          IEEE80211_CHAN_NO_HE |
2030                                          IEEE80211_CHAN_NO_EHT)) {
2031                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end,
2032                                                  sdata->vif.type == NL80211_IFTYPE_AP);
2033                 if (!pos)
2034                         goto out_err;
2035         }
2036
2037         if (cfg80211_any_usable_channels(local->hw.wiphy,
2038                                          BIT(NL80211_BAND_6GHZ),
2039                                          IEEE80211_CHAN_NO_HE)) {
2040                 struct ieee80211_supported_band *sband6;
2041
2042                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2043                 he_cap = ieee80211_get_he_iftype_cap(sband6,
2044                                 ieee80211_vif_type_p2p(&sdata->vif));
2045
2046                 if (he_cap) {
2047                         enum nl80211_iftype iftype =
2048                                 ieee80211_vif_type_p2p(&sdata->vif);
2049                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
2050
2051                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2052                 }
2053         }
2054
2055         /*
2056          * If adding more here, adjust code in main.c
2057          * that calculates local->scan_ies_len.
2058          */
2059
2060         return pos - buffer;
2061  out_err:
2062         WARN_ONCE(1, "not enough space for preq IEs\n");
2063  done:
2064         return pos - buffer;
2065 }
2066
2067 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2068                              size_t buffer_len,
2069                              struct ieee80211_scan_ies *ie_desc,
2070                              const u8 *ie, size_t ie_len,
2071                              u8 bands_used, u32 *rate_masks,
2072                              struct cfg80211_chan_def *chandef,
2073                              u32 flags)
2074 {
2075         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2076         int i;
2077
2078         memset(ie_desc, 0, sizeof(*ie_desc));
2079
2080         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2081                 if (bands_used & BIT(i)) {
2082                         pos += ieee80211_build_preq_ies_band(sdata,
2083                                                              buffer + pos,
2084                                                              buffer_len - pos,
2085                                                              ie, ie_len, i,
2086                                                              rate_masks[i],
2087                                                              chandef,
2088                                                              &custom_ie_offset,
2089                                                              flags);
2090                         ie_desc->ies[i] = buffer + old_pos;
2091                         ie_desc->len[i] = pos - old_pos;
2092                         old_pos = pos;
2093                 }
2094         }
2095
2096         /* add any remaining custom IEs */
2097         if (ie && ie_len) {
2098                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2099                               "not enough space for preq custom IEs\n"))
2100                         return pos;
2101                 memcpy(buffer + pos, ie + custom_ie_offset,
2102                        ie_len - custom_ie_offset);
2103                 ie_desc->common_ies = buffer + pos;
2104                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2105                 pos += ie_len - custom_ie_offset;
2106         }
2107
2108         return pos;
2109 };
2110
2111 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2112                                           const u8 *src, const u8 *dst,
2113                                           u32 ratemask,
2114                                           struct ieee80211_channel *chan,
2115                                           const u8 *ssid, size_t ssid_len,
2116                                           const u8 *ie, size_t ie_len,
2117                                           u32 flags)
2118 {
2119         struct ieee80211_local *local = sdata->local;
2120         struct cfg80211_chan_def chandef;
2121         struct sk_buff *skb;
2122         struct ieee80211_mgmt *mgmt;
2123         int ies_len;
2124         u32 rate_masks[NUM_NL80211_BANDS] = {};
2125         struct ieee80211_scan_ies dummy_ie_desc;
2126
2127         /*
2128          * Do not send DS Channel parameter for directed probe requests
2129          * in order to maximize the chance that we get a response.  Some
2130          * badly-behaved APs don't respond when this parameter is included.
2131          */
2132         chandef.width = sdata->vif.bss_conf.chandef.width;
2133         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2134                 chandef.chan = NULL;
2135         else
2136                 chandef.chan = chan;
2137
2138         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2139                                      local->scan_ies_len + ie_len);
2140         if (!skb)
2141                 return NULL;
2142
2143         rate_masks[chan->band] = ratemask;
2144         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2145                                            skb_tailroom(skb), &dummy_ie_desc,
2146                                            ie, ie_len, BIT(chan->band),
2147                                            rate_masks, &chandef, flags);
2148         skb_put(skb, ies_len);
2149
2150         if (dst) {
2151                 mgmt = (struct ieee80211_mgmt *) skb->data;
2152                 memcpy(mgmt->da, dst, ETH_ALEN);
2153                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2154         }
2155
2156         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2157
2158         return skb;
2159 }
2160
2161 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2162                             struct ieee802_11_elems *elems,
2163                             enum nl80211_band band, u32 *basic_rates)
2164 {
2165         struct ieee80211_supported_band *sband;
2166         size_t num_rates;
2167         u32 supp_rates, rate_flags;
2168         int i, j, shift;
2169
2170         sband = sdata->local->hw.wiphy->bands[band];
2171         if (WARN_ON(!sband))
2172                 return 1;
2173
2174         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2175         shift = ieee80211_vif_get_shift(&sdata->vif);
2176
2177         num_rates = sband->n_bitrates;
2178         supp_rates = 0;
2179         for (i = 0; i < elems->supp_rates_len +
2180                      elems->ext_supp_rates_len; i++) {
2181                 u8 rate = 0;
2182                 int own_rate;
2183                 bool is_basic;
2184                 if (i < elems->supp_rates_len)
2185                         rate = elems->supp_rates[i];
2186                 else if (elems->ext_supp_rates)
2187                         rate = elems->ext_supp_rates
2188                                 [i - elems->supp_rates_len];
2189                 own_rate = 5 * (rate & 0x7f);
2190                 is_basic = !!(rate & 0x80);
2191
2192                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2193                         continue;
2194
2195                 for (j = 0; j < num_rates; j++) {
2196                         int brate;
2197                         if ((rate_flags & sband->bitrates[j].flags)
2198                             != rate_flags)
2199                                 continue;
2200
2201                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2202                                              1 << shift);
2203
2204                         if (brate == own_rate) {
2205                                 supp_rates |= BIT(j);
2206                                 if (basic_rates && is_basic)
2207                                         *basic_rates |= BIT(j);
2208                         }
2209                 }
2210         }
2211         return supp_rates;
2212 }
2213
2214 void ieee80211_stop_device(struct ieee80211_local *local)
2215 {
2216         ieee80211_led_radio(local, false);
2217         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2218
2219         cancel_work_sync(&local->reconfig_filter);
2220
2221         flush_workqueue(local->workqueue);
2222         drv_stop(local);
2223 }
2224
2225 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2226                                            bool aborted)
2227 {
2228         /* It's possible that we don't handle the scan completion in
2229          * time during suspend, so if it's still marked as completed
2230          * here, queue the work and flush it to clean things up.
2231          * Instead of calling the worker function directly here, we
2232          * really queue it to avoid potential races with other flows
2233          * scheduling the same work.
2234          */
2235         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2236                 /* If coming from reconfiguration failure, abort the scan so
2237                  * we don't attempt to continue a partial HW scan - which is
2238                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2239                  * completed scan, and a 5 GHz portion is still pending.
2240                  */
2241                 if (aborted)
2242                         set_bit(SCAN_ABORTED, &local->scanning);
2243                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2244                 flush_delayed_work(&local->scan_work);
2245         }
2246 }
2247
2248 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2249 {
2250         struct ieee80211_sub_if_data *sdata;
2251         struct ieee80211_chanctx *ctx;
2252
2253         /*
2254          * We get here if during resume the device can't be restarted properly.
2255          * We might also get here if this happens during HW reset, which is a
2256          * slightly different situation and we need to drop all connections in
2257          * the latter case.
2258          *
2259          * Ask cfg80211 to turn off all interfaces, this will result in more
2260          * warnings but at least we'll then get into a clean stopped state.
2261          */
2262
2263         local->resuming = false;
2264         local->suspended = false;
2265         local->in_reconfig = false;
2266
2267         ieee80211_flush_completed_scan(local, true);
2268
2269         /* scheduled scan clearly can't be running any more, but tell
2270          * cfg80211 and clear local state
2271          */
2272         ieee80211_sched_scan_end(local);
2273
2274         list_for_each_entry(sdata, &local->interfaces, list)
2275                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2276
2277         /* Mark channel contexts as not being in the driver any more to avoid
2278          * removing them from the driver during the shutdown process...
2279          */
2280         mutex_lock(&local->chanctx_mtx);
2281         list_for_each_entry(ctx, &local->chanctx_list, list)
2282                 ctx->driver_present = false;
2283         mutex_unlock(&local->chanctx_mtx);
2284 }
2285
2286 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2287                                      struct ieee80211_sub_if_data *sdata,
2288                                      struct ieee80211_link_data *link)
2289 {
2290         struct ieee80211_chanctx_conf *conf;
2291         struct ieee80211_chanctx *ctx;
2292
2293         if (!local->use_chanctx)
2294                 return;
2295
2296         mutex_lock(&local->chanctx_mtx);
2297         conf = rcu_dereference_protected(link->conf->chanctx_conf,
2298                                          lockdep_is_held(&local->chanctx_mtx));
2299         if (conf) {
2300                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2301                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2302         }
2303         mutex_unlock(&local->chanctx_mtx);
2304 }
2305
2306 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2307 {
2308         struct ieee80211_local *local = sdata->local;
2309         struct sta_info *sta;
2310
2311         /* add STAs back */
2312         mutex_lock(&local->sta_mtx);
2313         list_for_each_entry(sta, &local->sta_list, list) {
2314                 enum ieee80211_sta_state state;
2315
2316                 if (!sta->uploaded || sta->sdata != sdata)
2317                         continue;
2318
2319                 for (state = IEEE80211_STA_NOTEXIST;
2320                      state < sta->sta_state; state++)
2321                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2322                                               state + 1));
2323         }
2324         mutex_unlock(&local->sta_mtx);
2325 }
2326
2327 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2328 {
2329         struct cfg80211_nan_func *func, **funcs;
2330         int res, id, i = 0;
2331
2332         res = drv_start_nan(sdata->local, sdata,
2333                             &sdata->u.nan.conf);
2334         if (WARN_ON(res))
2335                 return res;
2336
2337         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2338                         sizeof(*funcs),
2339                         GFP_KERNEL);
2340         if (!funcs)
2341                 return -ENOMEM;
2342
2343         /* Add all the functions:
2344          * This is a little bit ugly. We need to call a potentially sleeping
2345          * callback for each NAN function, so we can't hold the spinlock.
2346          */
2347         spin_lock_bh(&sdata->u.nan.func_lock);
2348
2349         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2350                 funcs[i++] = func;
2351
2352         spin_unlock_bh(&sdata->u.nan.func_lock);
2353
2354         for (i = 0; funcs[i]; i++) {
2355                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2356                 if (WARN_ON(res))
2357                         ieee80211_nan_func_terminated(&sdata->vif,
2358                                                       funcs[i]->instance_id,
2359                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2360                                                       GFP_KERNEL);
2361         }
2362
2363         kfree(funcs);
2364
2365         return 0;
2366 }
2367
2368 int ieee80211_reconfig(struct ieee80211_local *local)
2369 {
2370         struct ieee80211_hw *hw = &local->hw;
2371         struct ieee80211_sub_if_data *sdata;
2372         struct ieee80211_chanctx *ctx;
2373         struct sta_info *sta;
2374         int res, i;
2375         bool reconfig_due_to_wowlan = false;
2376         struct ieee80211_sub_if_data *sched_scan_sdata;
2377         struct cfg80211_sched_scan_request *sched_scan_req;
2378         bool sched_scan_stopped = false;
2379         bool suspended = local->suspended;
2380         bool in_reconfig = false;
2381
2382         /* nothing to do if HW shouldn't run */
2383         if (!local->open_count)
2384                 goto wake_up;
2385
2386 #ifdef CONFIG_PM
2387         if (suspended)
2388                 local->resuming = true;
2389
2390         if (local->wowlan) {
2391                 /*
2392                  * In the wowlan case, both mac80211 and the device
2393                  * are functional when the resume op is called, so
2394                  * clear local->suspended so the device could operate
2395                  * normally (e.g. pass rx frames).
2396                  */
2397                 local->suspended = false;
2398                 res = drv_resume(local);
2399                 local->wowlan = false;
2400                 if (res < 0) {
2401                         local->resuming = false;
2402                         return res;
2403                 }
2404                 if (res == 0)
2405                         goto wake_up;
2406                 WARN_ON(res > 1);
2407                 /*
2408                  * res is 1, which means the driver requested
2409                  * to go through a regular reset on wakeup.
2410                  * restore local->suspended in this case.
2411                  */
2412                 reconfig_due_to_wowlan = true;
2413                 local->suspended = true;
2414         }
2415 #endif
2416
2417         /*
2418          * In case of hw_restart during suspend (without wowlan),
2419          * cancel restart work, as we are reconfiguring the device
2420          * anyway.
2421          * Note that restart_work is scheduled on a frozen workqueue,
2422          * so we can't deadlock in this case.
2423          */
2424         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2425                 cancel_work_sync(&local->restart_work);
2426
2427         local->started = false;
2428
2429         /*
2430          * Upon resume hardware can sometimes be goofy due to
2431          * various platform / driver / bus issues, so restarting
2432          * the device may at times not work immediately. Propagate
2433          * the error.
2434          */
2435         res = drv_start(local);
2436         if (res) {
2437                 if (suspended)
2438                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2439                 else
2440                         WARN(1, "Hardware became unavailable during restart.\n");
2441                 ieee80211_handle_reconfig_failure(local);
2442                 return res;
2443         }
2444
2445         /* setup fragmentation threshold */
2446         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2447
2448         /* setup RTS threshold */
2449         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2450
2451         /* reset coverage class */
2452         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2453
2454         ieee80211_led_radio(local, true);
2455         ieee80211_mod_tpt_led_trig(local,
2456                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2457
2458         /* add interfaces */
2459         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2460         if (sdata) {
2461                 /* in HW restart it exists already */
2462                 WARN_ON(local->resuming);
2463                 res = drv_add_interface(local, sdata);
2464                 if (WARN_ON(res)) {
2465                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2466                         synchronize_net();
2467                         kfree(sdata);
2468                 }
2469         }
2470
2471         list_for_each_entry(sdata, &local->interfaces, list) {
2472                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2473                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2474                     ieee80211_sdata_running(sdata)) {
2475                         res = drv_add_interface(local, sdata);
2476                         if (WARN_ON(res))
2477                                 break;
2478                 }
2479         }
2480
2481         /* If adding any of the interfaces failed above, roll back and
2482          * report failure.
2483          */
2484         if (res) {
2485                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2486                                                      list)
2487                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2488                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2489                             ieee80211_sdata_running(sdata))
2490                                 drv_remove_interface(local, sdata);
2491                 ieee80211_handle_reconfig_failure(local);
2492                 return res;
2493         }
2494
2495         /* add channel contexts */
2496         if (local->use_chanctx) {
2497                 mutex_lock(&local->chanctx_mtx);
2498                 list_for_each_entry(ctx, &local->chanctx_list, list)
2499                         if (ctx->replace_state !=
2500                             IEEE80211_CHANCTX_REPLACES_OTHER)
2501                                 WARN_ON(drv_add_chanctx(local, ctx));
2502                 mutex_unlock(&local->chanctx_mtx);
2503
2504                 sdata = wiphy_dereference(local->hw.wiphy,
2505                                           local->monitor_sdata);
2506                 if (sdata && ieee80211_sdata_running(sdata))
2507                         ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2508         }
2509
2510         /* reconfigure hardware */
2511         ieee80211_hw_config(local, ~0);
2512
2513         ieee80211_configure_filter(local);
2514
2515         /* Finally also reconfigure all the BSS information */
2516         list_for_each_entry(sdata, &local->interfaces, list) {
2517                 unsigned int link_id;
2518                 u32 changed;
2519
2520                 if (!ieee80211_sdata_running(sdata))
2521                         continue;
2522
2523                 sdata_lock(sdata);
2524                 for (link_id = 0;
2525                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
2526                      link_id++) {
2527                         struct ieee80211_link_data *link;
2528
2529                         link = sdata_dereference(sdata->link[link_id], sdata);
2530                         if (link)
2531                                 ieee80211_assign_chanctx(local, sdata, link);
2532                 }
2533
2534                 switch (sdata->vif.type) {
2535                 case NL80211_IFTYPE_AP_VLAN:
2536                 case NL80211_IFTYPE_MONITOR:
2537                         break;
2538                 case NL80211_IFTYPE_ADHOC:
2539                         if (sdata->vif.cfg.ibss_joined)
2540                                 WARN_ON(drv_join_ibss(local, sdata));
2541                         fallthrough;
2542                 default:
2543                         ieee80211_reconfig_stations(sdata);
2544                         fallthrough;
2545                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2546                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2547                                 drv_conf_tx(local, &sdata->deflink, i,
2548                                             &sdata->deflink.tx_conf[i]);
2549                         break;
2550                 }
2551                 sdata_unlock(sdata);
2552
2553                 /* common change flags for all interface types */
2554                 changed = BSS_CHANGED_ERP_CTS_PROT |
2555                           BSS_CHANGED_ERP_PREAMBLE |
2556                           BSS_CHANGED_ERP_SLOT |
2557                           BSS_CHANGED_HT |
2558                           BSS_CHANGED_BASIC_RATES |
2559                           BSS_CHANGED_BEACON_INT |
2560                           BSS_CHANGED_BSSID |
2561                           BSS_CHANGED_CQM |
2562                           BSS_CHANGED_QOS |
2563                           BSS_CHANGED_IDLE |
2564                           BSS_CHANGED_TXPOWER |
2565                           BSS_CHANGED_MCAST_RATE;
2566
2567                 if (sdata->vif.bss_conf.mu_mimo_owner)
2568                         changed |= BSS_CHANGED_MU_GROUPS;
2569
2570                 switch (sdata->vif.type) {
2571                 case NL80211_IFTYPE_STATION:
2572                         changed |= BSS_CHANGED_ASSOC |
2573                                    BSS_CHANGED_ARP_FILTER |
2574                                    BSS_CHANGED_PS;
2575
2576                         /* Re-send beacon info report to the driver */
2577                         if (sdata->deflink.u.mgd.have_beacon)
2578                                 changed |= BSS_CHANGED_BEACON_INFO;
2579
2580                         if (sdata->vif.bss_conf.max_idle_period ||
2581                             sdata->vif.bss_conf.protected_keep_alive)
2582                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2583
2584                         sdata_lock(sdata);
2585                         ieee80211_bss_info_change_notify(sdata, changed);
2586                         sdata_unlock(sdata);
2587                         break;
2588                 case NL80211_IFTYPE_OCB:
2589                         changed |= BSS_CHANGED_OCB;
2590                         ieee80211_bss_info_change_notify(sdata, changed);
2591                         break;
2592                 case NL80211_IFTYPE_ADHOC:
2593                         changed |= BSS_CHANGED_IBSS;
2594                         fallthrough;
2595                 case NL80211_IFTYPE_AP:
2596                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2597
2598                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2599                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2600                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2601                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2602
2603                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2604                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2605
2606                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2607                                         drv_start_ap(local, sdata,
2608                                                      sdata->deflink.conf);
2609                         }
2610                         fallthrough;
2611                 case NL80211_IFTYPE_MESH_POINT:
2612                         if (sdata->vif.bss_conf.enable_beacon) {
2613                                 changed |= BSS_CHANGED_BEACON |
2614                                            BSS_CHANGED_BEACON_ENABLED;
2615                                 ieee80211_bss_info_change_notify(sdata, changed);
2616                         }
2617                         break;
2618                 case NL80211_IFTYPE_NAN:
2619                         res = ieee80211_reconfig_nan(sdata);
2620                         if (res < 0) {
2621                                 ieee80211_handle_reconfig_failure(local);
2622                                 return res;
2623                         }
2624                         break;
2625                 case NL80211_IFTYPE_AP_VLAN:
2626                 case NL80211_IFTYPE_MONITOR:
2627                 case NL80211_IFTYPE_P2P_DEVICE:
2628                         /* nothing to do */
2629                         break;
2630                 case NL80211_IFTYPE_UNSPECIFIED:
2631                 case NUM_NL80211_IFTYPES:
2632                 case NL80211_IFTYPE_P2P_CLIENT:
2633                 case NL80211_IFTYPE_P2P_GO:
2634                 case NL80211_IFTYPE_WDS:
2635                         WARN_ON(1);
2636                         break;
2637                 }
2638         }
2639
2640         ieee80211_recalc_ps(local);
2641
2642         /*
2643          * The sta might be in psm against the ap (e.g. because
2644          * this was the state before a hw restart), so we
2645          * explicitly send a null packet in order to make sure
2646          * it'll sync against the ap (and get out of psm).
2647          */
2648         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2649                 list_for_each_entry(sdata, &local->interfaces, list) {
2650                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2651                                 continue;
2652                         if (!sdata->u.mgd.associated)
2653                                 continue;
2654
2655                         ieee80211_send_nullfunc(local, sdata, false);
2656                 }
2657         }
2658
2659         /* APs are now beaconing, add back stations */
2660         list_for_each_entry(sdata, &local->interfaces, list) {
2661                 if (!ieee80211_sdata_running(sdata))
2662                         continue;
2663
2664                 sdata_lock(sdata);
2665                 switch (sdata->vif.type) {
2666                 case NL80211_IFTYPE_AP_VLAN:
2667                 case NL80211_IFTYPE_AP:
2668                         ieee80211_reconfig_stations(sdata);
2669                         break;
2670                 default:
2671                         break;
2672                 }
2673                 sdata_unlock(sdata);
2674         }
2675
2676         /* add back keys */
2677         list_for_each_entry(sdata, &local->interfaces, list)
2678                 ieee80211_reenable_keys(sdata);
2679
2680         /* Reconfigure sched scan if it was interrupted by FW restart */
2681         mutex_lock(&local->mtx);
2682         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2683                                                 lockdep_is_held(&local->mtx));
2684         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2685                                                 lockdep_is_held(&local->mtx));
2686         if (sched_scan_sdata && sched_scan_req)
2687                 /*
2688                  * Sched scan stopped, but we don't want to report it. Instead,
2689                  * we're trying to reschedule. However, if more than one scan
2690                  * plan was set, we cannot reschedule since we don't know which
2691                  * scan plan was currently running (and some scan plans may have
2692                  * already finished).
2693                  */
2694                 if (sched_scan_req->n_scan_plans > 1 ||
2695                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2696                                                          sched_scan_req)) {
2697                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2698                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2699                         sched_scan_stopped = true;
2700                 }
2701         mutex_unlock(&local->mtx);
2702
2703         if (sched_scan_stopped)
2704                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2705
2706  wake_up:
2707
2708         if (local->monitors == local->open_count && local->monitors > 0)
2709                 ieee80211_add_virtual_monitor(local);
2710
2711         /*
2712          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2713          * sessions can be established after a resume.
2714          *
2715          * Also tear down aggregation sessions since reconfiguring
2716          * them in a hardware restart scenario is not easily done
2717          * right now, and the hardware will have lost information
2718          * about the sessions, but we and the AP still think they
2719          * are active. This is really a workaround though.
2720          */
2721         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2722                 mutex_lock(&local->sta_mtx);
2723
2724                 list_for_each_entry(sta, &local->sta_list, list) {
2725                         if (!local->resuming)
2726                                 ieee80211_sta_tear_down_BA_sessions(
2727                                                 sta, AGG_STOP_LOCAL_REQUEST);
2728                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2729                 }
2730
2731                 mutex_unlock(&local->sta_mtx);
2732         }
2733
2734         /*
2735          * If this is for hw restart things are still running.
2736          * We may want to change that later, however.
2737          */
2738         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2739                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2740
2741         if (local->in_reconfig) {
2742                 in_reconfig = local->in_reconfig;
2743                 local->in_reconfig = false;
2744                 barrier();
2745
2746                 /* Restart deferred ROCs */
2747                 mutex_lock(&local->mtx);
2748                 ieee80211_start_next_roc(local);
2749                 mutex_unlock(&local->mtx);
2750
2751                 /* Requeue all works */
2752                 list_for_each_entry(sdata, &local->interfaces, list)
2753                         ieee80211_queue_work(&local->hw, &sdata->work);
2754         }
2755
2756         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2757                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2758                                         false);
2759
2760         if (in_reconfig) {
2761                 list_for_each_entry(sdata, &local->interfaces, list) {
2762                         if (!ieee80211_sdata_running(sdata))
2763                                 continue;
2764                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2765                                 ieee80211_sta_restart(sdata);
2766                 }
2767         }
2768
2769         if (!suspended)
2770                 return 0;
2771
2772 #ifdef CONFIG_PM
2773         /* first set suspended false, then resuming */
2774         local->suspended = false;
2775         mb();
2776         local->resuming = false;
2777
2778         ieee80211_flush_completed_scan(local, false);
2779
2780         if (local->open_count && !reconfig_due_to_wowlan)
2781                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2782
2783         list_for_each_entry(sdata, &local->interfaces, list) {
2784                 if (!ieee80211_sdata_running(sdata))
2785                         continue;
2786                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2787                         ieee80211_sta_restart(sdata);
2788         }
2789
2790         mod_timer(&local->sta_cleanup, jiffies + 1);
2791 #else
2792         WARN_ON(1);
2793 #endif
2794
2795         return 0;
2796 }
2797
2798 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2799 {
2800         struct ieee80211_sub_if_data *sdata;
2801         struct ieee80211_local *local;
2802         struct ieee80211_key *key;
2803
2804         if (WARN_ON(!vif))
2805                 return;
2806
2807         sdata = vif_to_sdata(vif);
2808         local = sdata->local;
2809
2810         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2811                     !local->resuming))
2812                 return;
2813
2814         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2815                     !local->in_reconfig))
2816                 return;
2817
2818         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2819                 return;
2820
2821         sdata->flags |= flag;
2822
2823         mutex_lock(&local->key_mtx);
2824         list_for_each_entry(key, &sdata->key_list, list)
2825                 key->flags |= KEY_FLAG_TAINTED;
2826         mutex_unlock(&local->key_mtx);
2827 }
2828
2829 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2830 {
2831         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2832 }
2833 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2834
2835 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2836 {
2837         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2838 }
2839 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2840
2841 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2842                            struct ieee80211_link_data *link)
2843 {
2844         struct ieee80211_local *local = sdata->local;
2845         struct ieee80211_chanctx_conf *chanctx_conf;
2846         struct ieee80211_chanctx *chanctx;
2847
2848         mutex_lock(&local->chanctx_mtx);
2849
2850         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2851                                                  lockdep_is_held(&local->chanctx_mtx));
2852
2853         /*
2854          * This function can be called from a work, thus it may be possible
2855          * that the chanctx_conf is removed (due to a disconnection, for
2856          * example).
2857          * So nothing should be done in such case.
2858          */
2859         if (!chanctx_conf)
2860                 goto unlock;
2861
2862         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2863         ieee80211_recalc_smps_chanctx(local, chanctx);
2864  unlock:
2865         mutex_unlock(&local->chanctx_mtx);
2866 }
2867
2868 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2869                                   int link_id)
2870 {
2871         struct ieee80211_local *local = sdata->local;
2872         struct ieee80211_chanctx_conf *chanctx_conf;
2873         struct ieee80211_chanctx *chanctx;
2874         int i;
2875
2876         mutex_lock(&local->chanctx_mtx);
2877
2878         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2879                 struct ieee80211_bss_conf *bss_conf;
2880
2881                 if (link_id >= 0 && link_id != i)
2882                         continue;
2883
2884                 rcu_read_lock();
2885                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2886                 if (!bss_conf) {
2887                         rcu_read_unlock();
2888                         continue;
2889                 }
2890
2891                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2892                                                          lockdep_is_held(&local->chanctx_mtx));
2893                 /*
2894                  * Since we hold the chanctx_mtx (checked above)
2895                  * we can take the chanctx_conf pointer out of the
2896                  * RCU critical section, it cannot go away without
2897                  * the mutex. Just the way we reached it could - in
2898                  * theory - go away, but we don't really care and
2899                  * it really shouldn't happen anyway.
2900                  */
2901                 rcu_read_unlock();
2902
2903                 if (WARN_ON_ONCE(!chanctx_conf))
2904                         goto unlock;
2905
2906                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2907                                        conf);
2908                 ieee80211_recalc_chanctx_min_def(local, chanctx);
2909         }
2910  unlock:
2911         mutex_unlock(&local->chanctx_mtx);
2912 }
2913
2914 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2915 {
2916         size_t pos = offset;
2917
2918         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2919                 pos += 2 + ies[pos + 1];
2920
2921         return pos;
2922 }
2923
2924 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2925                               u16 cap)
2926 {
2927         __le16 tmp;
2928
2929         *pos++ = WLAN_EID_HT_CAPABILITY;
2930         *pos++ = sizeof(struct ieee80211_ht_cap);
2931         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2932
2933         /* capability flags */
2934         tmp = cpu_to_le16(cap);
2935         memcpy(pos, &tmp, sizeof(u16));
2936         pos += sizeof(u16);
2937
2938         /* AMPDU parameters */
2939         *pos++ = ht_cap->ampdu_factor |
2940                  (ht_cap->ampdu_density <<
2941                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2942
2943         /* MCS set */
2944         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2945         pos += sizeof(ht_cap->mcs);
2946
2947         /* extended capabilities */
2948         pos += sizeof(__le16);
2949
2950         /* BF capabilities */
2951         pos += sizeof(__le32);
2952
2953         /* antenna selection */
2954         pos += sizeof(u8);
2955
2956         return pos;
2957 }
2958
2959 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2960                                u32 cap)
2961 {
2962         __le32 tmp;
2963
2964         *pos++ = WLAN_EID_VHT_CAPABILITY;
2965         *pos++ = sizeof(struct ieee80211_vht_cap);
2966         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2967
2968         /* capability flags */
2969         tmp = cpu_to_le32(cap);
2970         memcpy(pos, &tmp, sizeof(u32));
2971         pos += sizeof(u32);
2972
2973         /* VHT MCS set */
2974         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2975         pos += sizeof(vht_cap->vht_mcs);
2976
2977         return pos;
2978 }
2979
2980 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2981 {
2982         const struct ieee80211_sta_he_cap *he_cap;
2983         struct ieee80211_supported_band *sband;
2984         u8 n;
2985
2986         sband = ieee80211_get_sband(sdata);
2987         if (!sband)
2988                 return 0;
2989
2990         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2991         if (!he_cap)
2992                 return 0;
2993
2994         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2995         return 2 + 1 +
2996                sizeof(he_cap->he_cap_elem) + n +
2997                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2998                                      he_cap->he_cap_elem.phy_cap_info);
2999 }
3000
3001 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
3002                               const struct ieee80211_sta_he_cap *he_cap,
3003                               u8 *end)
3004 {
3005         struct ieee80211_he_cap_elem elem;
3006         u8 n;
3007         u8 ie_len;
3008         u8 *orig_pos = pos;
3009
3010         /* Make sure we have place for the IE */
3011         /*
3012          * TODO: the 1 added is because this temporarily is under the EXTENSION
3013          * IE. Get rid of it when it moves.
3014          */
3015         if (!he_cap)
3016                 return orig_pos;
3017
3018         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
3019         elem = he_cap->he_cap_elem;
3020
3021         if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3022                 elem.phy_cap_info[0] &=
3023                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3024                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3025
3026         if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3027                 elem.phy_cap_info[0] &=
3028                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3029
3030         if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3031                 elem.phy_cap_info[0] &=
3032                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3033
3034         n = ieee80211_he_mcs_nss_size(&elem);
3035         ie_len = 2 + 1 +
3036                  sizeof(he_cap->he_cap_elem) + n +
3037                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3038                                        he_cap->he_cap_elem.phy_cap_info);
3039
3040         if ((end - pos) < ie_len)
3041                 return orig_pos;
3042
3043         *pos++ = WLAN_EID_EXTENSION;
3044         pos++; /* We'll set the size later below */
3045         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3046
3047         /* Fixed data */
3048         memcpy(pos, &elem, sizeof(elem));
3049         pos += sizeof(elem);
3050
3051         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3052         pos += n;
3053
3054         /* Check if PPE Threshold should be present */
3055         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3056              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3057                 goto end;
3058
3059         /*
3060          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3061          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3062          */
3063         n = hweight8(he_cap->ppe_thres[0] &
3064                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3065         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3066                    IEEE80211_PPE_THRES_NSS_POS));
3067
3068         /*
3069          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3070          * total size.
3071          */
3072         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3073         n = DIV_ROUND_UP(n, 8);
3074
3075         /* Copy PPE Thresholds */
3076         memcpy(pos, &he_cap->ppe_thres, n);
3077         pos += n;
3078
3079 end:
3080         orig_pos[1] = (pos - orig_pos) - 2;
3081         return pos;
3082 }
3083
3084 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3085                                     enum ieee80211_smps_mode smps_mode,
3086                                     struct sk_buff *skb)
3087 {
3088         struct ieee80211_supported_band *sband;
3089         const struct ieee80211_sband_iftype_data *iftd;
3090         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3091         u8 *pos;
3092         u16 cap;
3093
3094         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3095                                           BIT(NL80211_BAND_6GHZ),
3096                                           IEEE80211_CHAN_NO_HE))
3097                 return;
3098
3099         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3100
3101         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3102         if (!iftd)
3103                 return;
3104
3105         /* Check for device HE 6 GHz capability before adding element */
3106         if (!iftd->he_6ghz_capa.capa)
3107                 return;
3108
3109         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3110         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3111
3112         switch (smps_mode) {
3113         case IEEE80211_SMPS_AUTOMATIC:
3114         case IEEE80211_SMPS_NUM_MODES:
3115                 WARN_ON(1);
3116                 fallthrough;
3117         case IEEE80211_SMPS_OFF:
3118                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3119                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3120                 break;
3121         case IEEE80211_SMPS_STATIC:
3122                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3123                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3124                 break;
3125         case IEEE80211_SMPS_DYNAMIC:
3126                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3127                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3128                 break;
3129         }
3130
3131         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3132         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3133                                     pos + 2 + 1 + sizeof(cap));
3134 }
3135
3136 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3137                                const struct cfg80211_chan_def *chandef,
3138                                u16 prot_mode, bool rifs_mode)
3139 {
3140         struct ieee80211_ht_operation *ht_oper;
3141         /* Build HT Information */
3142         *pos++ = WLAN_EID_HT_OPERATION;
3143         *pos++ = sizeof(struct ieee80211_ht_operation);
3144         ht_oper = (struct ieee80211_ht_operation *)pos;
3145         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3146                                         chandef->chan->center_freq);
3147         switch (chandef->width) {
3148         case NL80211_CHAN_WIDTH_160:
3149         case NL80211_CHAN_WIDTH_80P80:
3150         case NL80211_CHAN_WIDTH_80:
3151         case NL80211_CHAN_WIDTH_40:
3152                 if (chandef->center_freq1 > chandef->chan->center_freq)
3153                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3154                 else
3155                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3156                 break;
3157         case NL80211_CHAN_WIDTH_320:
3158                 /* HT information element should not be included on 6GHz */
3159                 WARN_ON(1);
3160                 return pos;
3161         default:
3162                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3163                 break;
3164         }
3165         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3166             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3167             chandef->width != NL80211_CHAN_WIDTH_20)
3168                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3169
3170         if (rifs_mode)
3171                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3172
3173         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3174         ht_oper->stbc_param = 0x0000;
3175
3176         /* It seems that Basic MCS set and Supported MCS set
3177            are identical for the first 10 bytes */
3178         memset(&ht_oper->basic_set, 0, 16);
3179         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3180
3181         return pos + sizeof(struct ieee80211_ht_operation);
3182 }
3183
3184 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3185                                    const struct cfg80211_chan_def *chandef)
3186 {
3187         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3188         *pos++ = 3;                                     /* IE length */
3189         /* New channel width */
3190         switch (chandef->width) {
3191         case NL80211_CHAN_WIDTH_80:
3192                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3193                 break;
3194         case NL80211_CHAN_WIDTH_160:
3195                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3196                 break;
3197         case NL80211_CHAN_WIDTH_80P80:
3198                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3199                 break;
3200         case NL80211_CHAN_WIDTH_320:
3201                 /* The behavior is not defined for 320 MHz channels */
3202                 WARN_ON(1);
3203                 fallthrough;
3204         default:
3205                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3206         }
3207
3208         /* new center frequency segment 0 */
3209         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3210         /* new center frequency segment 1 */
3211         if (chandef->center_freq2)
3212                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3213         else
3214                 *pos++ = 0;
3215 }
3216
3217 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3218                                 const struct cfg80211_chan_def *chandef)
3219 {
3220         struct ieee80211_vht_operation *vht_oper;
3221
3222         *pos++ = WLAN_EID_VHT_OPERATION;
3223         *pos++ = sizeof(struct ieee80211_vht_operation);
3224         vht_oper = (struct ieee80211_vht_operation *)pos;
3225         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3226                                                         chandef->center_freq1);
3227         if (chandef->center_freq2)
3228                 vht_oper->center_freq_seg1_idx =
3229                         ieee80211_frequency_to_channel(chandef->center_freq2);
3230         else
3231                 vht_oper->center_freq_seg1_idx = 0x00;
3232
3233         switch (chandef->width) {
3234         case NL80211_CHAN_WIDTH_160:
3235                 /*
3236                  * Convert 160 MHz channel width to new style as interop
3237                  * workaround.
3238                  */
3239                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3240                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3241                 if (chandef->chan->center_freq < chandef->center_freq1)
3242                         vht_oper->center_freq_seg0_idx -= 8;
3243                 else
3244                         vht_oper->center_freq_seg0_idx += 8;
3245                 break;
3246         case NL80211_CHAN_WIDTH_80P80:
3247                 /*
3248                  * Convert 80+80 MHz channel width to new style as interop
3249                  * workaround.
3250                  */
3251                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3252                 break;
3253         case NL80211_CHAN_WIDTH_80:
3254                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3255                 break;
3256         case NL80211_CHAN_WIDTH_320:
3257                 /* VHT information element should not be included on 6GHz */
3258                 WARN_ON(1);
3259                 return pos;
3260         default:
3261                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3262                 break;
3263         }
3264
3265         /* don't require special VHT peer rates */
3266         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3267
3268         return pos + sizeof(struct ieee80211_vht_operation);
3269 }
3270
3271 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3272 {
3273         struct ieee80211_he_operation *he_oper;
3274         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3275         u32 he_oper_params;
3276         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3277
3278         if (chandef->chan->band == NL80211_BAND_6GHZ)
3279                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3280
3281         *pos++ = WLAN_EID_EXTENSION;
3282         *pos++ = ie_len;
3283         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3284
3285         he_oper_params = 0;
3286         he_oper_params |= u32_encode_bits(1023, /* disabled */
3287                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3288         he_oper_params |= u32_encode_bits(1,
3289                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3290         he_oper_params |= u32_encode_bits(1,
3291                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3292         if (chandef->chan->band == NL80211_BAND_6GHZ)
3293                 he_oper_params |= u32_encode_bits(1,
3294                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3295
3296         he_oper = (struct ieee80211_he_operation *)pos;
3297         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3298
3299         /* don't require special HE peer rates */
3300         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3301         pos += sizeof(struct ieee80211_he_operation);
3302
3303         if (chandef->chan->band != NL80211_BAND_6GHZ)
3304                 goto out;
3305
3306         /* TODO add VHT operational */
3307         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3308         he_6ghz_op->minrate = 6; /* 6 Mbps */
3309         he_6ghz_op->primary =
3310                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3311         he_6ghz_op->ccfs0 =
3312                 ieee80211_frequency_to_channel(chandef->center_freq1);
3313         if (chandef->center_freq2)
3314                 he_6ghz_op->ccfs1 =
3315                         ieee80211_frequency_to_channel(chandef->center_freq2);
3316         else
3317                 he_6ghz_op->ccfs1 = 0;
3318
3319         switch (chandef->width) {
3320         case NL80211_CHAN_WIDTH_320:
3321                 /*
3322                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3323                  * channels.
3324                  */
3325                 WARN_ON(1);
3326                 break;
3327         case NL80211_CHAN_WIDTH_160:
3328                 /* Convert 160 MHz channel width to new style as interop
3329                  * workaround.
3330                  */
3331                 he_6ghz_op->control =
3332                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3333                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3334                 if (chandef->chan->center_freq < chandef->center_freq1)
3335                         he_6ghz_op->ccfs0 -= 8;
3336                 else
3337                         he_6ghz_op->ccfs0 += 8;
3338                 fallthrough;
3339         case NL80211_CHAN_WIDTH_80P80:
3340                 he_6ghz_op->control =
3341                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3342                 break;
3343         case NL80211_CHAN_WIDTH_80:
3344                 he_6ghz_op->control =
3345                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3346                 break;
3347         case NL80211_CHAN_WIDTH_40:
3348                 he_6ghz_op->control =
3349                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3350                 break;
3351         default:
3352                 he_6ghz_op->control =
3353                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3354                 break;
3355         }
3356
3357         pos += sizeof(struct ieee80211_he_6ghz_oper);
3358
3359 out:
3360         return pos;
3361 }
3362
3363 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3364                                struct cfg80211_chan_def *chandef)
3365 {
3366         enum nl80211_channel_type channel_type;
3367
3368         if (!ht_oper)
3369                 return false;
3370
3371         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3372         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3373                 channel_type = NL80211_CHAN_HT20;
3374                 break;
3375         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3376                 channel_type = NL80211_CHAN_HT40PLUS;
3377                 break;
3378         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3379                 channel_type = NL80211_CHAN_HT40MINUS;
3380                 break;
3381         default:
3382                 return false;
3383         }
3384
3385         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3386         return true;
3387 }
3388
3389 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3390                                 const struct ieee80211_vht_operation *oper,
3391                                 const struct ieee80211_ht_operation *htop,
3392                                 struct cfg80211_chan_def *chandef)
3393 {
3394         struct cfg80211_chan_def new = *chandef;
3395         int cf0, cf1;
3396         int ccfs0, ccfs1, ccfs2;
3397         int ccf0, ccf1;
3398         u32 vht_cap;
3399         bool support_80_80 = false;
3400         bool support_160 = false;
3401         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3402                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3403         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3404                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3405
3406         if (!oper || !htop)
3407                 return false;
3408
3409         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3410         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3411                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3412         support_80_80 = ((vht_cap &
3413                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3414                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3415                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3416                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3417                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3418         ccfs0 = oper->center_freq_seg0_idx;
3419         ccfs1 = oper->center_freq_seg1_idx;
3420         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3421                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3422                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3423
3424         ccf0 = ccfs0;
3425
3426         /* if not supported, parse as though we didn't understand it */
3427         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3428                 ext_nss_bw_supp = 0;
3429
3430         /*
3431          * Cf. IEEE 802.11 Table 9-250
3432          *
3433          * We really just consider that because it's inefficient to connect
3434          * at a higher bandwidth than we'll actually be able to use.
3435          */
3436         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3437         default:
3438         case 0x00:
3439                 ccf1 = 0;
3440                 support_160 = false;
3441                 support_80_80 = false;
3442                 break;
3443         case 0x01:
3444                 support_80_80 = false;
3445                 fallthrough;
3446         case 0x02:
3447         case 0x03:
3448                 ccf1 = ccfs2;
3449                 break;
3450         case 0x10:
3451                 ccf1 = ccfs1;
3452                 break;
3453         case 0x11:
3454         case 0x12:
3455                 if (!ccfs1)
3456                         ccf1 = ccfs2;
3457                 else
3458                         ccf1 = ccfs1;
3459                 break;
3460         case 0x13:
3461         case 0x20:
3462         case 0x23:
3463                 ccf1 = ccfs1;
3464                 break;
3465         }
3466
3467         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3468         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3469
3470         switch (oper->chan_width) {
3471         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3472                 /* just use HT information directly */
3473                 break;
3474         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3475                 new.width = NL80211_CHAN_WIDTH_80;
3476                 new.center_freq1 = cf0;
3477                 /* If needed, adjust based on the newer interop workaround. */
3478                 if (ccf1) {
3479                         unsigned int diff;
3480
3481                         diff = abs(ccf1 - ccf0);
3482                         if ((diff == 8) && support_160) {
3483                                 new.width = NL80211_CHAN_WIDTH_160;
3484                                 new.center_freq1 = cf1;
3485                         } else if ((diff > 8) && support_80_80) {
3486                                 new.width = NL80211_CHAN_WIDTH_80P80;
3487                                 new.center_freq2 = cf1;
3488                         }
3489                 }
3490                 break;
3491         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3492                 /* deprecated encoding */
3493                 new.width = NL80211_CHAN_WIDTH_160;
3494                 new.center_freq1 = cf0;
3495                 break;
3496         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3497                 /* deprecated encoding */
3498                 new.width = NL80211_CHAN_WIDTH_80P80;
3499                 new.center_freq1 = cf0;
3500                 new.center_freq2 = cf1;
3501                 break;
3502         default:
3503                 return false;
3504         }
3505
3506         if (!cfg80211_chandef_valid(&new))
3507                 return false;
3508
3509         *chandef = new;
3510         return true;
3511 }
3512
3513 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper,
3514                                 bool support_160, bool support_320,
3515                                 struct cfg80211_chan_def *chandef)
3516 {
3517         struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
3518
3519         chandef->center_freq1 =
3520                 ieee80211_channel_to_frequency(info->ccfs0,
3521                                                chandef->chan->band);
3522
3523         switch (u8_get_bits(info->control,
3524                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3525         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3526                 chandef->width = NL80211_CHAN_WIDTH_20;
3527                 break;
3528         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3529                 chandef->width = NL80211_CHAN_WIDTH_40;
3530                 break;
3531         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3532                 chandef->width = NL80211_CHAN_WIDTH_80;
3533                 break;
3534         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3535                 if (support_160) {
3536                         chandef->width = NL80211_CHAN_WIDTH_160;
3537                         chandef->center_freq1 =
3538                                 ieee80211_channel_to_frequency(info->ccfs1,
3539                                                                chandef->chan->band);
3540                 } else {
3541                         chandef->width = NL80211_CHAN_WIDTH_80;
3542                 }
3543                 break;
3544         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3545                 if (support_320) {
3546                         chandef->width = NL80211_CHAN_WIDTH_320;
3547                         chandef->center_freq1 =
3548                                 ieee80211_channel_to_frequency(info->ccfs1,
3549                                                                chandef->chan->band);
3550                 } else if (support_160) {
3551                         chandef->width = NL80211_CHAN_WIDTH_160;
3552                 } else {
3553                         chandef->width = NL80211_CHAN_WIDTH_80;
3554
3555                         if (chandef->center_freq1 > chandef->chan->center_freq)
3556                                 chandef->center_freq1 -= 40;
3557                         else
3558                                 chandef->center_freq1 += 40;
3559                 }
3560                 break;
3561         }
3562 }
3563
3564 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3565                                     const struct ieee80211_he_operation *he_oper,
3566                                     const struct ieee80211_eht_operation *eht_oper,
3567                                     struct cfg80211_chan_def *chandef)
3568 {
3569         struct ieee80211_local *local = sdata->local;
3570         struct ieee80211_supported_band *sband;
3571         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3572         const struct ieee80211_sta_he_cap *he_cap;
3573         const struct ieee80211_sta_eht_cap *eht_cap;
3574         struct cfg80211_chan_def he_chandef = *chandef;
3575         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3576         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3577         bool support_80_80, support_160, support_320;
3578         u8 he_phy_cap, eht_phy_cap;
3579         u32 freq;
3580
3581         if (chandef->chan->band != NL80211_BAND_6GHZ)
3582                 return true;
3583
3584         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3585
3586         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3587         if (!he_cap) {
3588                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3589                 return false;
3590         }
3591
3592         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3593         support_160 =
3594                 he_phy_cap &
3595                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3596         support_80_80 =
3597                 he_phy_cap &
3598                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3599
3600         if (!he_oper) {
3601                 sdata_info(sdata,
3602                            "HE is not advertised on (on %d MHz), expect issues\n",
3603                            chandef->chan->center_freq);
3604                 return false;
3605         }
3606
3607         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3608         if (!eht_cap) {
3609                 sdata_info(sdata, "Missing iftype sband data/EHT cap");
3610                 eht_oper = NULL;
3611         }
3612
3613         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3614
3615         if (!he_6ghz_oper) {
3616                 sdata_info(sdata,
3617                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3618                            chandef->chan->center_freq);
3619                 return false;
3620         }
3621
3622         /*
3623          * The EHT operation IE does not contain the primary channel so the
3624          * primary channel frequency should be taken from the 6 GHz operation
3625          * information.
3626          */
3627         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3628                                               NL80211_BAND_6GHZ);
3629         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3630
3631         switch (u8_get_bits(he_6ghz_oper->control,
3632                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3633         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3634                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3635                 break;
3636         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3637                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3638                 break;
3639         default:
3640                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3641                 break;
3642         }
3643
3644         if (!eht_oper ||
3645             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3646                 switch (u8_get_bits(he_6ghz_oper->control,
3647                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3648                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3649                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3650                         break;
3651                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3652                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3653                         break;
3654                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3655                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3656                         break;
3657                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3658                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3659                         if (!he_6ghz_oper->ccfs1)
3660                                 break;
3661                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3662                                 if (support_160)
3663                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3664                         } else {
3665                                 if (support_80_80)
3666                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3667                         }
3668                         break;
3669                 }
3670
3671                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3672                         he_chandef.center_freq1 =
3673                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3674                                                                NL80211_BAND_6GHZ);
3675                 } else {
3676                         he_chandef.center_freq1 =
3677                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3678                                                                NL80211_BAND_6GHZ);
3679                         if (support_80_80 || support_160)
3680                                 he_chandef.center_freq2 =
3681                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3682                                                                        NL80211_BAND_6GHZ);
3683                 }
3684         } else {
3685                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3686                 support_320 =
3687                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3688
3689                 ieee80211_chandef_eht_oper(eht_oper, support_160,
3690                                            support_320, &he_chandef);
3691         }
3692
3693         if (!cfg80211_chandef_valid(&he_chandef)) {
3694                 sdata_info(sdata,
3695                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3696                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3697                            he_chandef.width,
3698                            he_chandef.center_freq1,
3699                            he_chandef.center_freq2);
3700                 return false;
3701         }
3702
3703         *chandef = he_chandef;
3704
3705         return true;
3706 }
3707
3708 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3709                                 struct cfg80211_chan_def *chandef)
3710 {
3711         u32 oper_freq;
3712
3713         if (!oper)
3714                 return false;
3715
3716         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3717         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3718                 chandef->width = NL80211_CHAN_WIDTH_1;
3719                 break;
3720         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3721                 chandef->width = NL80211_CHAN_WIDTH_2;
3722                 break;
3723         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3724                 chandef->width = NL80211_CHAN_WIDTH_4;
3725                 break;
3726         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3727                 chandef->width = NL80211_CHAN_WIDTH_8;
3728                 break;
3729         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3730                 chandef->width = NL80211_CHAN_WIDTH_16;
3731                 break;
3732         default:
3733                 return false;
3734         }
3735
3736         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3737                                                   NL80211_BAND_S1GHZ);
3738         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3739         chandef->freq1_offset = oper_freq % 1000;
3740
3741         return true;
3742 }
3743
3744 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
3745                              const struct ieee80211_supported_band *sband,
3746                              const u8 *srates, int srates_len, u32 *rates)
3747 {
3748         u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
3749         int shift = ieee80211_chanwidth_get_shift(width);
3750         struct ieee80211_rate *br;
3751         int brate, rate, i, j, count = 0;
3752
3753         *rates = 0;
3754
3755         for (i = 0; i < srates_len; i++) {
3756                 rate = srates[i] & 0x7f;
3757
3758                 for (j = 0; j < sband->n_bitrates; j++) {
3759                         br = &sband->bitrates[j];
3760                         if ((rate_flags & br->flags) != rate_flags)
3761                                 continue;
3762
3763                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3764                         if (brate == rate) {
3765                                 *rates |= BIT(j);
3766                                 count++;
3767                                 break;
3768                         }
3769                 }
3770         }
3771         return count;
3772 }
3773
3774 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3775                             struct sk_buff *skb, bool need_basic,
3776                             enum nl80211_band band)
3777 {
3778         struct ieee80211_local *local = sdata->local;
3779         struct ieee80211_supported_band *sband;
3780         int rate, shift;
3781         u8 i, rates, *pos;
3782         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3783         u32 rate_flags;
3784
3785         shift = ieee80211_vif_get_shift(&sdata->vif);
3786         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3787         sband = local->hw.wiphy->bands[band];
3788         rates = 0;
3789         for (i = 0; i < sband->n_bitrates; i++) {
3790                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3791                         continue;
3792                 rates++;
3793         }
3794         if (rates > 8)
3795                 rates = 8;
3796
3797         if (skb_tailroom(skb) < rates + 2)
3798                 return -ENOMEM;
3799
3800         pos = skb_put(skb, rates + 2);
3801         *pos++ = WLAN_EID_SUPP_RATES;
3802         *pos++ = rates;
3803         for (i = 0; i < rates; i++) {
3804                 u8 basic = 0;
3805                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3806                         continue;
3807
3808                 if (need_basic && basic_rates & BIT(i))
3809                         basic = 0x80;
3810                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3811                                     5 * (1 << shift));
3812                 *pos++ = basic | (u8) rate;
3813         }
3814
3815         return 0;
3816 }
3817
3818 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3819                                 struct sk_buff *skb, bool need_basic,
3820                                 enum nl80211_band band)
3821 {
3822         struct ieee80211_local *local = sdata->local;
3823         struct ieee80211_supported_band *sband;
3824         int rate, shift;
3825         u8 i, exrates, *pos;
3826         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3827         u32 rate_flags;
3828
3829         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3830         shift = ieee80211_vif_get_shift(&sdata->vif);
3831
3832         sband = local->hw.wiphy->bands[band];
3833         exrates = 0;
3834         for (i = 0; i < sband->n_bitrates; i++) {
3835                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3836                         continue;
3837                 exrates++;
3838         }
3839
3840         if (exrates > 8)
3841                 exrates -= 8;
3842         else
3843                 exrates = 0;
3844
3845         if (skb_tailroom(skb) < exrates + 2)
3846                 return -ENOMEM;
3847
3848         if (exrates) {
3849                 pos = skb_put(skb, exrates + 2);
3850                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3851                 *pos++ = exrates;
3852                 for (i = 8; i < sband->n_bitrates; i++) {
3853                         u8 basic = 0;
3854                         if ((rate_flags & sband->bitrates[i].flags)
3855                             != rate_flags)
3856                                 continue;
3857                         if (need_basic && basic_rates & BIT(i))
3858                                 basic = 0x80;
3859                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3860                                             5 * (1 << shift));
3861                         *pos++ = basic | (u8) rate;
3862                 }
3863         }
3864         return 0;
3865 }
3866
3867 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3868 {
3869         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3870
3871         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3872                 return 0;
3873
3874         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3875 }
3876 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3877
3878 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3879 {
3880         if (!mcs)
3881                 return 1;
3882
3883         /* TODO: consider rx_highest */
3884
3885         if (mcs->rx_mask[3])
3886                 return 4;
3887         if (mcs->rx_mask[2])
3888                 return 3;
3889         if (mcs->rx_mask[1])
3890                 return 2;
3891         return 1;
3892 }
3893
3894 /**
3895  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3896  * @local: mac80211 hw info struct
3897  * @status: RX status
3898  * @mpdu_len: total MPDU length (including FCS)
3899  * @mpdu_offset: offset into MPDU to calculate timestamp at
3900  *
3901  * This function calculates the RX timestamp at the given MPDU offset, taking
3902  * into account what the RX timestamp was. An offset of 0 will just normalize
3903  * the timestamp to TSF at beginning of MPDU reception.
3904  */
3905 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3906                                      struct ieee80211_rx_status *status,
3907                                      unsigned int mpdu_len,
3908                                      unsigned int mpdu_offset)
3909 {
3910         u64 ts = status->mactime;
3911         struct rate_info ri;
3912         u16 rate;
3913         u8 n_ltf;
3914
3915         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3916                 return 0;
3917
3918         memset(&ri, 0, sizeof(ri));
3919
3920         ri.bw = status->bw;
3921
3922         /* Fill cfg80211 rate info */
3923         switch (status->encoding) {
3924         case RX_ENC_HE:
3925                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3926                 ri.mcs = status->rate_idx;
3927                 ri.nss = status->nss;
3928                 ri.he_ru_alloc = status->he_ru;
3929                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3930                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3931
3932                 /*
3933                  * See P802.11ax_D6.0, section 27.3.4 for
3934                  * VHT PPDU format.
3935                  */
3936                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3937                         mpdu_offset += 2;
3938                         ts += 36;
3939
3940                         /*
3941                          * TODO:
3942                          * For HE MU PPDU, add the HE-SIG-B.
3943                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3944                          * For HE TB PPDU, add 4us for the HE-STF.
3945                          * Add the HE-LTF durations - variable.
3946                          */
3947                 }
3948
3949                 break;
3950         case RX_ENC_HT:
3951                 ri.mcs = status->rate_idx;
3952                 ri.flags |= RATE_INFO_FLAGS_MCS;
3953                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3954                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3955
3956                 /*
3957                  * See P802.11REVmd_D3.0, section 19.3.2 for
3958                  * HT PPDU format.
3959                  */
3960                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3961                         mpdu_offset += 2;
3962                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3963                                 ts += 24;
3964                         else
3965                                 ts += 32;
3966
3967                         /*
3968                          * Add Data HT-LTFs per streams
3969                          * TODO: add Extension HT-LTFs, 4us per LTF
3970                          */
3971                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3972                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3973                         ts += n_ltf * 4;
3974                 }
3975
3976                 break;
3977         case RX_ENC_VHT:
3978                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3979                 ri.mcs = status->rate_idx;
3980                 ri.nss = status->nss;
3981                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3982                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3983
3984                 /*
3985                  * See P802.11REVmd_D3.0, section 21.3.2 for
3986                  * VHT PPDU format.
3987                  */
3988                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3989                         mpdu_offset += 2;
3990                         ts += 36;
3991
3992                         /*
3993                          * Add VHT-LTFs per streams
3994                          */
3995                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3996                                 ri.nss + 1 : ri.nss;
3997                         ts += 4 * n_ltf;
3998                 }
3999
4000                 break;
4001         default:
4002                 WARN_ON(1);
4003                 fallthrough;
4004         case RX_ENC_LEGACY: {
4005                 struct ieee80211_supported_band *sband;
4006                 int shift = 0;
4007                 int bitrate;
4008
4009                 switch (status->bw) {
4010                 case RATE_INFO_BW_10:
4011                         shift = 1;
4012                         break;
4013                 case RATE_INFO_BW_5:
4014                         shift = 2;
4015                         break;
4016                 }
4017
4018                 sband = local->hw.wiphy->bands[status->band];
4019                 bitrate = sband->bitrates[status->rate_idx].bitrate;
4020                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
4021
4022                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4023                         if (status->band == NL80211_BAND_5GHZ) {
4024                                 ts += 20 << shift;
4025                                 mpdu_offset += 2;
4026                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4027                                 ts += 96;
4028                         } else {
4029                                 ts += 192;
4030                         }
4031                 }
4032                 break;
4033                 }
4034         }
4035
4036         rate = cfg80211_calculate_bitrate(&ri);
4037         if (WARN_ONCE(!rate,
4038                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4039                       (unsigned long long)status->flag, status->rate_idx,
4040                       status->nss))
4041                 return 0;
4042
4043         /* rewind from end of MPDU */
4044         if (status->flag & RX_FLAG_MACTIME_END)
4045                 ts -= mpdu_len * 8 * 10 / rate;
4046
4047         ts += mpdu_offset * 8 * 10 / rate;
4048
4049         return ts;
4050 }
4051
4052 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4053 {
4054         struct ieee80211_sub_if_data *sdata;
4055         struct cfg80211_chan_def chandef;
4056
4057         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4058         lockdep_assert_wiphy(local->hw.wiphy);
4059
4060         mutex_lock(&local->mtx);
4061         list_for_each_entry(sdata, &local->interfaces, list) {
4062                 /* it might be waiting for the local->mtx, but then
4063                  * by the time it gets it, sdata->wdev.cac_started
4064                  * will no longer be true
4065                  */
4066                 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work);
4067
4068                 if (sdata->wdev.cac_started) {
4069                         chandef = sdata->vif.bss_conf.chandef;
4070                         ieee80211_link_release_channel(&sdata->deflink);
4071                         cfg80211_cac_event(sdata->dev,
4072                                            &chandef,
4073                                            NL80211_RADAR_CAC_ABORTED,
4074                                            GFP_KERNEL);
4075                 }
4076         }
4077         mutex_unlock(&local->mtx);
4078 }
4079
4080 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4081 {
4082         struct ieee80211_local *local =
4083                 container_of(work, struct ieee80211_local, radar_detected_work);
4084         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4085         struct ieee80211_chanctx *ctx;
4086         int num_chanctx = 0;
4087
4088         mutex_lock(&local->chanctx_mtx);
4089         list_for_each_entry(ctx, &local->chanctx_list, list) {
4090                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4091                         continue;
4092
4093                 num_chanctx++;
4094                 chandef = ctx->conf.def;
4095         }
4096         mutex_unlock(&local->chanctx_mtx);
4097
4098         wiphy_lock(local->hw.wiphy);
4099         ieee80211_dfs_cac_cancel(local);
4100         wiphy_unlock(local->hw.wiphy);
4101
4102         if (num_chanctx > 1)
4103                 /* XXX: multi-channel is not supported yet */
4104                 WARN_ON(1);
4105         else
4106                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4107 }
4108
4109 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4110 {
4111         struct ieee80211_local *local = hw_to_local(hw);
4112
4113         trace_api_radar_detected(local);
4114
4115         schedule_work(&local->radar_detected_work);
4116 }
4117 EXPORT_SYMBOL(ieee80211_radar_detected);
4118
4119 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4120 {
4121         ieee80211_conn_flags_t ret;
4122         int tmp;
4123
4124         switch (c->width) {
4125         case NL80211_CHAN_WIDTH_20:
4126                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4127                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4128                 break;
4129         case NL80211_CHAN_WIDTH_40:
4130                 c->width = NL80211_CHAN_WIDTH_20;
4131                 c->center_freq1 = c->chan->center_freq;
4132                 ret = IEEE80211_CONN_DISABLE_40MHZ |
4133                       IEEE80211_CONN_DISABLE_VHT;
4134                 break;
4135         case NL80211_CHAN_WIDTH_80:
4136                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4137                 /* n_P40 */
4138                 tmp /= 2;
4139                 /* freq_P40 */
4140                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4141                 c->width = NL80211_CHAN_WIDTH_40;
4142                 ret = IEEE80211_CONN_DISABLE_VHT;
4143                 break;
4144         case NL80211_CHAN_WIDTH_80P80:
4145                 c->center_freq2 = 0;
4146                 c->width = NL80211_CHAN_WIDTH_80;
4147                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4148                       IEEE80211_CONN_DISABLE_160MHZ;
4149                 break;
4150         case NL80211_CHAN_WIDTH_160:
4151                 /* n_P20 */
4152                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4153                 /* n_P80 */
4154                 tmp /= 4;
4155                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4156                 c->width = NL80211_CHAN_WIDTH_80;
4157                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4158                       IEEE80211_CONN_DISABLE_160MHZ;
4159                 break;
4160         case NL80211_CHAN_WIDTH_320:
4161                 /* n_P20 */
4162                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4163                 /* n_P160 */
4164                 tmp /= 8;
4165                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4166                 c->width = NL80211_CHAN_WIDTH_160;
4167                 ret = IEEE80211_CONN_DISABLE_320MHZ;
4168                 break;
4169         default:
4170         case NL80211_CHAN_WIDTH_20_NOHT:
4171                 WARN_ON_ONCE(1);
4172                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4173                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4174                 break;
4175         case NL80211_CHAN_WIDTH_1:
4176         case NL80211_CHAN_WIDTH_2:
4177         case NL80211_CHAN_WIDTH_4:
4178         case NL80211_CHAN_WIDTH_8:
4179         case NL80211_CHAN_WIDTH_16:
4180         case NL80211_CHAN_WIDTH_5:
4181         case NL80211_CHAN_WIDTH_10:
4182                 WARN_ON_ONCE(1);
4183                 /* keep c->width */
4184                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4185                 break;
4186         }
4187
4188         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4189
4190         return ret;
4191 }
4192
4193 /*
4194  * Returns true if smps_mode_new is strictly more restrictive than
4195  * smps_mode_old.
4196  */
4197 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4198                                    enum ieee80211_smps_mode smps_mode_new)
4199 {
4200         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4201                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4202                 return false;
4203
4204         switch (smps_mode_old) {
4205         case IEEE80211_SMPS_STATIC:
4206                 return false;
4207         case IEEE80211_SMPS_DYNAMIC:
4208                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4209         case IEEE80211_SMPS_OFF:
4210                 return smps_mode_new != IEEE80211_SMPS_OFF;
4211         default:
4212                 WARN_ON(1);
4213         }
4214
4215         return false;
4216 }
4217
4218 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4219                               struct cfg80211_csa_settings *csa_settings)
4220 {
4221         struct sk_buff *skb;
4222         struct ieee80211_mgmt *mgmt;
4223         struct ieee80211_local *local = sdata->local;
4224         int freq;
4225         int hdr_len = offsetofend(struct ieee80211_mgmt,
4226                                   u.action.u.chan_switch);
4227         u8 *pos;
4228
4229         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4230             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4231                 return -EOPNOTSUPP;
4232
4233         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4234                             5 + /* channel switch announcement element */
4235                             3 + /* secondary channel offset element */
4236                             5 + /* wide bandwidth channel switch announcement */
4237                             8); /* mesh channel switch parameters element */
4238         if (!skb)
4239                 return -ENOMEM;
4240
4241         skb_reserve(skb, local->tx_headroom);
4242         mgmt = skb_put_zero(skb, hdr_len);
4243         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4244                                           IEEE80211_STYPE_ACTION);
4245
4246         eth_broadcast_addr(mgmt->da);
4247         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4248         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4249                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4250         } else {
4251                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4252                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4253         }
4254         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4255         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4256         pos = skb_put(skb, 5);
4257         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4258         *pos++ = 3;                                             /* IE length */
4259         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4260         freq = csa_settings->chandef.chan->center_freq;
4261         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4262         *pos++ = csa_settings->count;                           /* count */
4263
4264         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4265                 enum nl80211_channel_type ch_type;
4266
4267                 skb_put(skb, 3);
4268                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4269                 *pos++ = 1;                                     /* IE length */
4270                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4271                 if (ch_type == NL80211_CHAN_HT40PLUS)
4272                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4273                 else
4274                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4275         }
4276
4277         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4278                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4279
4280                 skb_put(skb, 8);
4281                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4282                 *pos++ = 6;                                     /* IE length */
4283                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4284                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4285                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4286                 *pos++ |= csa_settings->block_tx ?
4287                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4288                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4289                 pos += 2;
4290                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4291                 pos += 2;
4292         }
4293
4294         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4295             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4296             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4297                 skb_put(skb, 5);
4298                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4299         }
4300
4301         ieee80211_tx_skb(sdata, skb);
4302         return 0;
4303 }
4304
4305 static bool
4306 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4307 {
4308         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4309         int skip;
4310
4311         if (end > 0)
4312                 return false;
4313
4314         /* One shot NOA  */
4315         if (data->count[i] == 1)
4316                 return false;
4317
4318         if (data->desc[i].interval == 0)
4319                 return false;
4320
4321         /* End time is in the past, check for repetitions */
4322         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4323         if (data->count[i] < 255) {
4324                 if (data->count[i] <= skip) {
4325                         data->count[i] = 0;
4326                         return false;
4327                 }
4328
4329                 data->count[i] -= skip;
4330         }
4331
4332         data->desc[i].start += skip * data->desc[i].interval;
4333
4334         return true;
4335 }
4336
4337 static bool
4338 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4339                              s32 *offset)
4340 {
4341         bool ret = false;
4342         int i;
4343
4344         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4345                 s32 cur;
4346
4347                 if (!data->count[i])
4348                         continue;
4349
4350                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4351                         ret = true;
4352
4353                 cur = data->desc[i].start - tsf;
4354                 if (cur > *offset)
4355                         continue;
4356
4357                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4358                 if (cur > *offset)
4359                         *offset = cur;
4360         }
4361
4362         return ret;
4363 }
4364
4365 static u32
4366 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4367 {
4368         s32 offset = 0;
4369         int tries = 0;
4370         /*
4371          * arbitrary limit, used to avoid infinite loops when combined NoA
4372          * descriptors cover the full time period.
4373          */
4374         int max_tries = 5;
4375
4376         ieee80211_extend_absent_time(data, tsf, &offset);
4377         do {
4378                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4379                         break;
4380
4381                 tries++;
4382         } while (tries < max_tries);
4383
4384         return offset;
4385 }
4386
4387 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4388 {
4389         u32 next_offset = BIT(31) - 1;
4390         int i;
4391
4392         data->absent = 0;
4393         data->has_next_tsf = false;
4394         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4395                 s32 start;
4396
4397                 if (!data->count[i])
4398                         continue;
4399
4400                 ieee80211_extend_noa_desc(data, tsf, i);
4401                 start = data->desc[i].start - tsf;
4402                 if (start <= 0)
4403                         data->absent |= BIT(i);
4404
4405                 if (next_offset > start)
4406                         next_offset = start;
4407
4408                 data->has_next_tsf = true;
4409         }
4410
4411         if (data->absent)
4412                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4413
4414         data->next_tsf = tsf + next_offset;
4415 }
4416 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4417
4418 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4419                             struct ieee80211_noa_data *data, u32 tsf)
4420 {
4421         int ret = 0;
4422         int i;
4423
4424         memset(data, 0, sizeof(*data));
4425
4426         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4427                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4428
4429                 if (!desc->count || !desc->duration)
4430                         continue;
4431
4432                 data->count[i] = desc->count;
4433                 data->desc[i].start = le32_to_cpu(desc->start_time);
4434                 data->desc[i].duration = le32_to_cpu(desc->duration);
4435                 data->desc[i].interval = le32_to_cpu(desc->interval);
4436
4437                 if (data->count[i] > 1 &&
4438                     data->desc[i].interval < data->desc[i].duration)
4439                         continue;
4440
4441                 ieee80211_extend_noa_desc(data, tsf, i);
4442                 ret++;
4443         }
4444
4445         if (ret)
4446                 ieee80211_update_p2p_noa(data, tsf);
4447
4448         return ret;
4449 }
4450 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4451
4452 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4453                            struct ieee80211_sub_if_data *sdata)
4454 {
4455         u64 tsf = drv_get_tsf(local, sdata);
4456         u64 dtim_count = 0;
4457         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4458         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4459         struct ps_data *ps;
4460         u8 bcns_from_dtim;
4461
4462         if (tsf == -1ULL || !beacon_int || !dtim_period)
4463                 return;
4464
4465         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4466             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4467                 if (!sdata->bss)
4468                         return;
4469
4470                 ps = &sdata->bss->ps;
4471         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4472                 ps = &sdata->u.mesh.ps;
4473         } else {
4474                 return;
4475         }
4476
4477         /*
4478          * actually finds last dtim_count, mac80211 will update in
4479          * __beacon_add_tim().
4480          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4481          */
4482         do_div(tsf, beacon_int);
4483         bcns_from_dtim = do_div(tsf, dtim_period);
4484         /* just had a DTIM */
4485         if (!bcns_from_dtim)
4486                 dtim_count = 0;
4487         else
4488                 dtim_count = dtim_period - bcns_from_dtim;
4489
4490         ps->dtim_count = dtim_count;
4491 }
4492
4493 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4494                                          struct ieee80211_chanctx *ctx)
4495 {
4496         struct ieee80211_link_data *link;
4497         u8 radar_detect = 0;
4498
4499         lockdep_assert_held(&local->chanctx_mtx);
4500
4501         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4502                 return 0;
4503
4504         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4505                 if (link->reserved_radar_required)
4506                         radar_detect |= BIT(link->reserved_chandef.width);
4507
4508         /*
4509          * An in-place reservation context should not have any assigned vifs
4510          * until it replaces the other context.
4511          */
4512         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4513                 !list_empty(&ctx->assigned_links));
4514
4515         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4516                 if (!link->radar_required)
4517                         continue;
4518
4519                 radar_detect |=
4520                         BIT(link->conf->chandef.width);
4521         }
4522
4523         return radar_detect;
4524 }
4525
4526 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4527                                  const struct cfg80211_chan_def *chandef,
4528                                  enum ieee80211_chanctx_mode chanmode,
4529                                  u8 radar_detect)
4530 {
4531         struct ieee80211_local *local = sdata->local;
4532         struct ieee80211_sub_if_data *sdata_iter;
4533         enum nl80211_iftype iftype = sdata->wdev.iftype;
4534         struct ieee80211_chanctx *ctx;
4535         int total = 1;
4536         struct iface_combination_params params = {
4537                 .radar_detect = radar_detect,
4538         };
4539
4540         lockdep_assert_held(&local->chanctx_mtx);
4541
4542         if (WARN_ON(hweight32(radar_detect) > 1))
4543                 return -EINVAL;
4544
4545         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4546                     !chandef->chan))
4547                 return -EINVAL;
4548
4549         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4550                 return -EINVAL;
4551
4552         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4553             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4554                 /*
4555                  * always passing this is harmless, since it'll be the
4556                  * same value that cfg80211 finds if it finds the same
4557                  * interface ... and that's always allowed
4558                  */
4559                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4560         }
4561
4562         /* Always allow software iftypes */
4563         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4564                 if (radar_detect)
4565                         return -EINVAL;
4566                 return 0;
4567         }
4568
4569         if (chandef)
4570                 params.num_different_channels = 1;
4571
4572         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4573                 params.iftype_num[iftype] = 1;
4574
4575         list_for_each_entry(ctx, &local->chanctx_list, list) {
4576                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4577                         continue;
4578                 params.radar_detect |=
4579                         ieee80211_chanctx_radar_detect(local, ctx);
4580                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4581                         params.num_different_channels++;
4582                         continue;
4583                 }
4584                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4585                     cfg80211_chandef_compatible(chandef,
4586                                                 &ctx->conf.def))
4587                         continue;
4588                 params.num_different_channels++;
4589         }
4590
4591         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4592                 struct wireless_dev *wdev_iter;
4593
4594                 wdev_iter = &sdata_iter->wdev;
4595
4596                 if (sdata_iter == sdata ||
4597                     !ieee80211_sdata_running(sdata_iter) ||
4598                     cfg80211_iftype_allowed(local->hw.wiphy,
4599                                             wdev_iter->iftype, 0, 1))
4600                         continue;
4601
4602                 params.iftype_num[wdev_iter->iftype]++;
4603                 total++;
4604         }
4605
4606         if (total == 1 && !params.radar_detect)
4607                 return 0;
4608
4609         return cfg80211_check_combinations(local->hw.wiphy, &params);
4610 }
4611
4612 static void
4613 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4614                          void *data)
4615 {
4616         u32 *max_num_different_channels = data;
4617
4618         *max_num_different_channels = max(*max_num_different_channels,
4619                                           c->num_different_channels);
4620 }
4621
4622 int ieee80211_max_num_channels(struct ieee80211_local *local)
4623 {
4624         struct ieee80211_sub_if_data *sdata;
4625         struct ieee80211_chanctx *ctx;
4626         u32 max_num_different_channels = 1;
4627         int err;
4628         struct iface_combination_params params = {0};
4629
4630         lockdep_assert_held(&local->chanctx_mtx);
4631
4632         list_for_each_entry(ctx, &local->chanctx_list, list) {
4633                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4634                         continue;
4635
4636                 params.num_different_channels++;
4637
4638                 params.radar_detect |=
4639                         ieee80211_chanctx_radar_detect(local, ctx);
4640         }
4641
4642         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4643                 params.iftype_num[sdata->wdev.iftype]++;
4644
4645         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4646                                          ieee80211_iter_max_chans,
4647                                          &max_num_different_channels);
4648         if (err < 0)
4649                 return err;
4650
4651         return max_num_different_channels;
4652 }
4653
4654 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4655                                 struct ieee80211_sta_s1g_cap *caps,
4656                                 struct sk_buff *skb)
4657 {
4658         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4659         struct ieee80211_s1g_cap s1g_capab;
4660         u8 *pos;
4661         int i;
4662
4663         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4664                 return;
4665
4666         if (!caps->s1g)
4667                 return;
4668
4669         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4670         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4671
4672         /* override the capability info */
4673         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4674                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4675
4676                 s1g_capab.capab_info[i] &= ~mask;
4677                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4678         }
4679
4680         /* then MCS and NSS set */
4681         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4682                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4683
4684                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4685                 s1g_capab.supp_mcs_nss[i] |=
4686                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4687         }
4688
4689         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4690         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4691         *pos++ = sizeof(s1g_capab);
4692
4693         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4694 }
4695
4696 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4697                                   struct sk_buff *skb)
4698 {
4699         u8 *pos = skb_put(skb, 3);
4700
4701         *pos++ = WLAN_EID_AID_REQUEST;
4702         *pos++ = 1;
4703         *pos++ = 0;
4704 }
4705
4706 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4707 {
4708         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4709         *buf++ = 7; /* len */
4710         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4711         *buf++ = 0x50;
4712         *buf++ = 0xf2;
4713         *buf++ = 2; /* WME */
4714         *buf++ = 0; /* WME info */
4715         *buf++ = 1; /* WME ver */
4716         *buf++ = qosinfo; /* U-APSD no in use */
4717
4718         return buf;
4719 }
4720
4721 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4722                              unsigned long *frame_cnt,
4723                              unsigned long *byte_cnt)
4724 {
4725         struct txq_info *txqi = to_txq_info(txq);
4726         u32 frag_cnt = 0, frag_bytes = 0;
4727         struct sk_buff *skb;
4728
4729         skb_queue_walk(&txqi->frags, skb) {
4730                 frag_cnt++;
4731                 frag_bytes += skb->len;
4732         }
4733
4734         if (frame_cnt)
4735                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4736
4737         if (byte_cnt)
4738                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4739 }
4740 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4741
4742 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4743         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4744         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4745         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4746         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4747 };
4748
4749 u16 ieee80211_encode_usf(int listen_interval)
4750 {
4751         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4752         u16 ui, usf = 0;
4753
4754         /* find greatest USF */
4755         while (usf < IEEE80211_MAX_USF) {
4756                 if (listen_interval % listen_int_usf[usf + 1])
4757                         break;
4758                 usf += 1;
4759         }
4760         ui = listen_interval / listen_int_usf[usf];
4761
4762         /* error if there is a remainder. Should've been checked by user */
4763         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4764         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4765                           FIELD_PREP(LISTEN_INT_UI, ui);
4766
4767         return (u16) listen_interval;
4768 }
4769
4770 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4771 {
4772         const struct ieee80211_sta_he_cap *he_cap;
4773         const struct ieee80211_sta_eht_cap *eht_cap;
4774         struct ieee80211_supported_band *sband;
4775         bool is_ap;
4776         u8 n;
4777
4778         sband = ieee80211_get_sband(sdata);
4779         if (!sband)
4780                 return 0;
4781
4782         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4783         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4784         if (!he_cap || !eht_cap)
4785                 return 0;
4786
4787         is_ap = iftype == NL80211_IFTYPE_AP ||
4788                 iftype == NL80211_IFTYPE_P2P_GO;
4789
4790         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4791                                        &eht_cap->eht_cap_elem,
4792                                        is_ap);
4793         return 2 + 1 +
4794                sizeof(he_cap->he_cap_elem) + n +
4795                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4796                                       eht_cap->eht_cap_elem.phy_cap_info);
4797         return 0;
4798 }
4799
4800 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
4801                                const struct ieee80211_sta_he_cap *he_cap,
4802                                const struct ieee80211_sta_eht_cap *eht_cap,
4803                                u8 *end,
4804                                bool for_ap)
4805 {
4806         u8 mcs_nss_len, ppet_len;
4807         u8 ie_len;
4808         u8 *orig_pos = pos;
4809
4810         /* Make sure we have place for the IE */
4811         if (!he_cap || !eht_cap)
4812                 return orig_pos;
4813
4814         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4815                                                  &eht_cap->eht_cap_elem,
4816                                                  for_ap);
4817         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4818                                           eht_cap->eht_cap_elem.phy_cap_info);
4819
4820         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4821         if ((end - pos) < ie_len)
4822                 return orig_pos;
4823
4824         *pos++ = WLAN_EID_EXTENSION;
4825         *pos++ = ie_len - 2;
4826         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
4827
4828         /* Fixed data */
4829         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
4830         pos += sizeof(eht_cap->eht_cap_elem);
4831
4832         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4833         pos += mcs_nss_len;
4834
4835         if (ppet_len) {
4836                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
4837                 pos += ppet_len;
4838         }
4839
4840         return pos;
4841 }
4842
4843 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
4844 {
4845         unsigned int elem_len;
4846
4847         if (!len_pos)
4848                 return;
4849
4850         elem_len = skb->data + skb->len - len_pos - 1;
4851
4852         while (elem_len > 255) {
4853                 /* this one is 255 */
4854                 *len_pos = 255;
4855                 /* remaining data gets smaller */
4856                 elem_len -= 255;
4857                 /* make space for the fragment ID/len in SKB */
4858                 skb_put(skb, 2);
4859                 /* shift back the remaining data to place fragment ID/len */
4860                 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
4861                 /* place the fragment ID */
4862                 len_pos += 255 + 1;
4863                 *len_pos = WLAN_EID_FRAGMENT;
4864                 /* and point to fragment length to update later */
4865                 len_pos++;
4866         }
4867
4868         *len_pos = elem_len;
4869 }