net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2021 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  49                         enum nl80211_iftype type)
  50 {
  51         __le16 fc = hdr->frame_control;
  52
  53         if (ieee80211_is_data(fc)) {
  54                 if (len < 24) /* drop incorrect hdr len (data) */
  55                         return NULL;
  56
  57                 if (ieee80211_has_a4(fc))
  58                         return NULL;
  59                 if (ieee80211_has_tods(fc))
  60                         return hdr->addr1;
  61                 if (ieee80211_has_fromds(fc))
  62                         return hdr->addr2;
  63
  64                 return hdr->addr3;
  65         }
  66
  67         if (ieee80211_is_s1g_beacon(fc)) {
  68                 struct ieee80211_ext *ext = (void *) hdr;
  69
  70                 return ext->u.s1g_beacon.sa;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98 EXPORT_SYMBOL(ieee80211_get_bssid);
  99
 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 101 {
 102         struct sk_buff *skb;
 103         struct ieee80211_hdr *hdr;
 104
 105         skb_queue_walk(&tx->skbs, skb) {
 106                 hdr = (struct ieee80211_hdr *) skb->data;
 107                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 108         }
 109 }
 110
 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 112                              int rate, int erp, int short_preamble,
 113                              int shift)
 114 {
 115         int dur;
 116
 117         /* calculate duration (in microseconds, rounded up to next higher
 118          * integer if it includes a fractional microsecond) to send frame of
 119          * len bytes (does not include FCS) at the given rate. Duration will
 120          * also include SIFS.
 121          *
 122          * rate is in 100 kbps, so divident is multiplied by 10 in the
 123          * DIV_ROUND_UP() operations.
 124          *
 125          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 126          * is assumed to be 0 otherwise.
 127          */
 128
 129         if (band == NL80211_BAND_5GHZ || erp) {
 130                 /*
 131                  * OFDM:
 132                  *
 133                  * N_DBPS = DATARATE x 4
 134                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 135                  *      (16 = SIGNAL time, 6 = tail bits)
 136                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 137                  *
 138                  * T_SYM = 4 usec
 139                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 140                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 141                  *      signal ext = 6 usec
 142                  */
 143                 dur = 16; /* SIFS + signal ext */
 144                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 145                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 146
 147                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 148                  *  * times 4 for 5 MHz
 149                  *  * times 2 for 10 MHz
 150                  */
 151                 dur *= 1 << shift;
 152
 153                 /* rates should already consider the channel bandwidth,
 154                  * don't apply divisor again.
 155                  */
 156                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 157                                         4 * rate); /* T_SYM x N_SYM */
 158         } else {
 159                 /*
 160                  * 802.11b or 802.11g with 802.11b compatibility:
 161                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 162                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 163                  *
 164                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 165                  * aSIFSTime = 10 usec
 166                  * aPreambleLength = 144 usec or 72 usec with short preamble
 167                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 168                  */
 169                 dur = 10; /* aSIFSTime = 10 usec */
 170                 dur += short_preamble ? (72 + 24) : (144 + 48);
 171
 172                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 173         }
 174
 175         return dur;
 176 }
 177
 178 /* Exported duration function for driver use */
 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 180                                         struct ieee80211_vif *vif,
 181                                         enum nl80211_band band,
 182                                         size_t frame_len,
 183                                         struct ieee80211_rate *rate)
 184 {
 185         struct ieee80211_sub_if_data *sdata;
 186         u16 dur;
 187         int erp, shift = 0;
 188         bool short_preamble = false;
 189
 190         erp = 0;
 191         if (vif) {
 192                 sdata = vif_to_sdata(vif);
 193                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 194                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 195                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 196                 shift = ieee80211_vif_get_shift(vif);
 197         }
 198
 199         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 200                                        short_preamble, shift);
 201
 202         return cpu_to_le16(dur);
 203 }
 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 205
 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 207                               struct ieee80211_vif *vif, size_t frame_len,
 208                               const struct ieee80211_tx_info *frame_txctl)
 209 {
 210         struct ieee80211_local *local = hw_to_local(hw);
 211         struct ieee80211_rate *rate;
 212         struct ieee80211_sub_if_data *sdata;
 213         bool short_preamble;
 214         int erp, shift = 0, bitrate;
 215         u16 dur;
 216         struct ieee80211_supported_band *sband;
 217
 218         sband = local->hw.wiphy->bands[frame_txctl->band];
 219
 220         short_preamble = false;
 221
 222         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 223
 224         erp = 0;
 225         if (vif) {
 226                 sdata = vif_to_sdata(vif);
 227                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 228                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 229                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 230                 shift = ieee80211_vif_get_shift(vif);
 231         }
 232
 233         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 234
 235         /* CTS duration */
 236         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                        erp, short_preamble, shift);
 238         /* Data frame duration */
 239         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 240                                         erp, short_preamble, shift);
 241         /* ACK duration */
 242         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 243                                         erp, short_preamble, shift);
 244
 245         return cpu_to_le16(dur);
 246 }
 247 EXPORT_SYMBOL(ieee80211_rts_duration);
 248
 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 250                                     struct ieee80211_vif *vif,
 251                                     size_t frame_len,
 252                                     const struct ieee80211_tx_info *frame_txctl)
 253 {
 254         struct ieee80211_local *local = hw_to_local(hw);
 255         struct ieee80211_rate *rate;
 256         struct ieee80211_sub_if_data *sdata;
 257         bool short_preamble;
 258         int erp, shift = 0, bitrate;
 259         u16 dur;
 260         struct ieee80211_supported_band *sband;
 261
 262         sband = local->hw.wiphy->bands[frame_txctl->band];
 263
 264         short_preamble = false;
 265
 266         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 267         erp = 0;
 268         if (vif) {
 269                 sdata = vif_to_sdata(vif);
 270                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 271                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 272                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 273                 shift = ieee80211_vif_get_shift(vif);
 274         }
 275
 276         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 277
 278         /* Data frame duration */
 279         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 280                                        erp, short_preamble, shift);
 281         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 /* ACK duration */
 283                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 284                                                 erp, short_preamble, shift);
 285         }
 286
 287         return cpu_to_le16(dur);
 288 }
 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 290
 291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 292 {
 293         struct ieee80211_local *local = sdata->local;
 294         struct ieee80211_vif *vif = &sdata->vif;
 295         struct fq *fq = &local->fq;
 296         struct ps_data *ps = NULL;
 297         struct txq_info *txqi;
 298         struct sta_info *sta;
 299         int i;
 300
 301         local_bh_disable();
 302         spin_lock(&fq->lock);
 303
 304         if (sdata->vif.type == NL80211_IFTYPE_AP)
 305                 ps = &sdata->bss->ps;
 306
 307         sdata->vif.txqs_stopped[ac] = false;
 308
 309         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 310                 if (sdata != sta->sdata)
 311                         continue;
 312
 313                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 314                         struct ieee80211_txq *txq = sta->sta.txq[i];
 315
 316                         if (!txq)
 317                                 continue;
 318
 319                         txqi = to_txq_info(txq);
 320
 321                         if (ac != txq->ac)
 322                                 continue;
 323
 324                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 325                                                 &txqi->flags))
 326                                 continue;
 327
 328                         spin_unlock(&fq->lock);
 329                         drv_wake_tx_queue(local, txqi);
 330                         spin_lock(&fq->lock);
 331                 }
 332         }
 333
 334         if (!vif->txq)
 335                 goto out;
 336
 337         txqi = to_txq_info(vif->txq);
 338
 339         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 340             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 341                 goto out;
 342
 343         spin_unlock(&fq->lock);
 344
 345         drv_wake_tx_queue(local, txqi);
 346         local_bh_enable();
 347         return;
 348 out:
 349         spin_unlock(&fq->lock);
 350         local_bh_enable();
 351 }
 352
 353 static void
 354 __releases(&local->queue_stop_reason_lock)
 355 __acquires(&local->queue_stop_reason_lock)
 356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 357 {
 358         struct ieee80211_sub_if_data *sdata;
 359         int n_acs = IEEE80211_NUM_ACS;
 360         int i;
 361
 362         rcu_read_lock();
 363
 364         if (local->hw.queues < IEEE80211_NUM_ACS)
 365                 n_acs = 1;
 366
 367         for (i = 0; i < local->hw.queues; i++) {
 368                 if (local->queue_stop_reasons[i])
 369                         continue;
 370
 371                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 372                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 373                         int ac;
 374
 375                         for (ac = 0; ac < n_acs; ac++) {
 376                                 int ac_queue = sdata->vif.hw_queue[ac];
 377
 378                                 if (ac_queue == i ||
 379                                     sdata->vif.cab_queue == i)
 380                                         __ieee80211_wake_txqs(sdata, ac);
 381                         }
 382                 }
 383                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 384         }
 385
 386         rcu_read_unlock();
 387 }
 388
 389 void ieee80211_wake_txqs(struct tasklet_struct *t)
 390 {
 391         struct ieee80211_local *local = from_tasklet(local, t,
 392                                                      wake_txqs_tasklet);
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 396         _ieee80211_wake_txqs(local, &flags);
 397         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 398 }
 399
 400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 401 {
 402         struct ieee80211_sub_if_data *sdata;
 403         int n_acs = IEEE80211_NUM_ACS;
 404
 405         if (local->ops->wake_tx_queue)
 406                 return;
 407
 408         if (local->hw.queues < IEEE80211_NUM_ACS)
 409                 n_acs = 1;
 410
 411         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 412                 int ac;
 413
 414                 if (!sdata->dev)
 415                         continue;
 416
 417                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 418                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 419                         continue;
 420
 421                 for (ac = 0; ac < n_acs; ac++) {
 422                         int ac_queue = sdata->vif.hw_queue[ac];
 423
 424                         if (ac_queue == queue ||
 425                             (sdata->vif.cab_queue == queue &&
 426                              local->queue_stop_reasons[ac_queue] == 0 &&
 427                              skb_queue_empty(&local->pending[ac_queue])))
 428                                 netif_wake_subqueue(sdata->dev, ac);
 429                 }
 430         }
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         trace_wake_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 446                 return;
 447
 448         if (!refcounted) {
 449                 local->q_stop_reasons[queue][reason] = 0;
 450         } else {
 451                 local->q_stop_reasons[queue][reason]--;
 452                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 453                         local->q_stop_reasons[queue][reason] = 0;
 454         }
 455
 456         if (local->q_stop_reasons[queue][reason] == 0)
 457                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 458
 459         if (local->queue_stop_reasons[queue] != 0)
 460                 /* someone still has this queue stopped */
 461                 return;
 462
 463         if (skb_queue_empty(&local->pending[queue])) {
 464                 rcu_read_lock();
 465                 ieee80211_propagate_queue_wake(local, queue);
 466                 rcu_read_unlock();
 467         } else
 468                 tasklet_schedule(&local->tx_pending_tasklet);
 469
 470         /*
 471          * Calling _ieee80211_wake_txqs here can be a problem because it may
 472          * release queue_stop_reason_lock which has been taken by
 473          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 474          * release someone's lock, but it is fine because all the callers of
 475          * __ieee80211_wake_queue call it right before releasing the lock.
 476          */
 477         if (local->ops->wake_tx_queue) {
 478                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 479                         tasklet_schedule(&local->wake_txqs_tasklet);
 480                 else
 481                         _ieee80211_wake_txqs(local, flags);
 482         }
 483 }
 484
 485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 486                                     enum queue_stop_reason reason,
 487                                     bool refcounted)
 488 {
 489         struct ieee80211_local *local = hw_to_local(hw);
 490         unsigned long flags;
 491
 492         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 493         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 494         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 495 }
 496
 497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 498 {
 499         ieee80211_wake_queue_by_reason(hw, queue,
 500                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 501                                        false);
 502 }
 503 EXPORT_SYMBOL(ieee80211_wake_queue);
 504
 505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 506                                    enum queue_stop_reason reason,
 507                                    bool refcounted)
 508 {
 509         struct ieee80211_local *local = hw_to_local(hw);
 510         struct ieee80211_sub_if_data *sdata;
 511         int n_acs = IEEE80211_NUM_ACS;
 512
 513         trace_stop_queue(local, queue, reason);
 514
 515         if (WARN_ON(queue >= hw->queues))
 516                 return;
 517
 518         if (!refcounted)
 519                 local->q_stop_reasons[queue][reason] = 1;
 520         else
 521                 local->q_stop_reasons[queue][reason]++;
 522
 523         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 524                 return;
 525
 526         if (local->hw.queues < IEEE80211_NUM_ACS)
 527                 n_acs = 1;
 528
 529         rcu_read_lock();
 530         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 531                 int ac;
 532
 533                 if (!sdata->dev)
 534                         continue;
 535
 536                 for (ac = 0; ac < n_acs; ac++) {
 537                         if (sdata->vif.hw_queue[ac] == queue ||
 538                             sdata->vif.cab_queue == queue) {
 539                                 if (!local->ops->wake_tx_queue) {
 540                                         netif_stop_subqueue(sdata->dev, ac);
 541                                         continue;
 542                                 }
 543                                 spin_lock(&local->fq.lock);
 544                                 sdata->vif.txqs_stopped[ac] = true;
 545                                 spin_unlock(&local->fq.lock);
 546                         }
 547                 }
 548         }
 549         rcu_read_unlock();
 550 }
 551
 552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 553                                     enum queue_stop_reason reason,
 554                                     bool refcounted)
 555 {
 556         struct ieee80211_local *local = hw_to_local(hw);
 557         unsigned long flags;
 558
 559         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 560         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 561         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 562 }
 563
 564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 565 {
 566         ieee80211_stop_queue_by_reason(hw, queue,
 567                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 568                                        false);
 569 }
 570 EXPORT_SYMBOL(ieee80211_stop_queue);
 571
 572 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 573                                struct sk_buff *skb)
 574 {
 575         struct ieee80211_hw *hw = &local->hw;
 576         unsigned long flags;
 577         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 578         int queue = info->hw_queue;
 579
 580         if (WARN_ON(!info->control.vif)) {
 581                 ieee80211_free_txskb(&local->hw, skb);
 582                 return;
 583         }
 584
 585         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 586         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 587                                false);
 588         __skb_queue_tail(&local->pending[queue], skb);
 589         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 590                                false, &flags);
 591         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 592 }
 593
 594 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 595                                 struct sk_buff_head *skbs)
 596 {
 597         struct ieee80211_hw *hw = &local->hw;
 598         struct sk_buff *skb;
 599         unsigned long flags;
 600         int queue, i;
 601
 602         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 603         while ((skb = skb_dequeue(skbs))) {
 604                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 605
 606                 if (WARN_ON(!info->control.vif)) {
 607                         ieee80211_free_txskb(&local->hw, skb);
 608                         continue;
 609                 }
 610
 611                 queue = info->hw_queue;
 612
 613                 __ieee80211_stop_queue(hw, queue,
 614                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 615                                 false);
 616
 617                 __skb_queue_tail(&local->pending[queue], skb);
 618         }
 619
 620         for (i = 0; i < hw->queues; i++)
 621                 __ieee80211_wake_queue(hw, i,
 622                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 623                         false, &flags);
 624         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 625 }
 626
 627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 628                                      unsigned long queues,
 629                                      enum queue_stop_reason reason,
 630                                      bool refcounted)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633         unsigned long flags;
 634         int i;
 635
 636         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 637
 638         for_each_set_bit(i, &queues, hw->queues)
 639                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 640
 641         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 642 }
 643
 644 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 645 {
 646         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 647                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 648                                         false);
 649 }
 650 EXPORT_SYMBOL(ieee80211_stop_queues);
 651
 652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 653 {
 654         struct ieee80211_local *local = hw_to_local(hw);
 655         unsigned long flags;
 656         int ret;
 657
 658         if (WARN_ON(queue >= hw->queues))
 659                 return true;
 660
 661         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 662         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 663                        &local->queue_stop_reasons[queue]);
 664         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 665         return ret;
 666 }
 667 EXPORT_SYMBOL(ieee80211_queue_stopped);
 668
 669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 670                                      unsigned long queues,
 671                                      enum queue_stop_reason reason,
 672                                      bool refcounted)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675         unsigned long flags;
 676         int i;
 677
 678         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 679
 680         for_each_set_bit(i, &queues, hw->queues)
 681                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 682
 683         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 684 }
 685
 686 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 687 {
 688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 689                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 690                                         false);
 691 }
 692 EXPORT_SYMBOL(ieee80211_wake_queues);
 693
 694 static unsigned int
 695 ieee80211_get_vif_queues(struct ieee80211_local *local,
 696                          struct ieee80211_sub_if_data *sdata)
 697 {
 698         unsigned int queues;
 699
 700         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 701                 int ac;
 702
 703                 queues = 0;
 704
 705                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 706                         queues |= BIT(sdata->vif.hw_queue[ac]);
 707                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 708                         queues |= BIT(sdata->vif.cab_queue);
 709         } else {
 710                 /* all queues */
 711                 queues = BIT(local->hw.queues) - 1;
 712         }
 713
 714         return queues;
 715 }
 716
 717 void __ieee80211_flush_queues(struct ieee80211_local *local,
 718                               struct ieee80211_sub_if_data *sdata,
 719                               unsigned int queues, bool drop)
 720 {
 721         if (!local->ops->flush)
 722                 return;
 723
 724         /*
 725          * If no queue was set, or if the HW doesn't support
 726          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 727          */
 728         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 729                 queues = ieee80211_get_vif_queues(local, sdata);
 730
 731         ieee80211_stop_queues_by_reason(&local->hw, queues,
 732                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 733                                         false);
 734
 735         drv_flush(local, sdata, queues, drop);
 736
 737         ieee80211_wake_queues_by_reason(&local->hw, queues,
 738                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 739                                         false);
 740 }
 741
 742 void ieee80211_flush_queues(struct ieee80211_local *local,
 743                             struct ieee80211_sub_if_data *sdata, bool drop)
 744 {
 745         __ieee80211_flush_queues(local, sdata, 0, drop);
 746 }
 747
 748 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 749                                struct ieee80211_sub_if_data *sdata,
 750                                enum queue_stop_reason reason)
 751 {
 752         ieee80211_stop_queues_by_reason(&local->hw,
 753                                         ieee80211_get_vif_queues(local, sdata),
 754                                         reason, true);
 755 }
 756
 757 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 758                                struct ieee80211_sub_if_data *sdata,
 759                                enum queue_stop_reason reason)
 760 {
 761         ieee80211_wake_queues_by_reason(&local->hw,
 762                                         ieee80211_get_vif_queues(local, sdata),
 763                                         reason, true);
 764 }
 765
 766 static void __iterate_interfaces(struct ieee80211_local *local,
 767                                  u32 iter_flags,
 768                                  void (*iterator)(void *data, u8 *mac,
 769                                                   struct ieee80211_vif *vif),
 770                                  void *data)
 771 {
 772         struct ieee80211_sub_if_data *sdata;
 773         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 774
 775         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 776                 switch (sdata->vif.type) {
 777                 case NL80211_IFTYPE_MONITOR:
 778                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 779                                 continue;
 780                         break;
 781                 case NL80211_IFTYPE_AP_VLAN:
 782                         continue;
 783                 default:
 784                         break;
 785                 }
 786                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 787                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 788                         continue;
 789                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 790                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 791                         continue;
 792                 if (ieee80211_sdata_running(sdata) || !active_only)
 793                         iterator(data, sdata->vif.addr,
 794                                  &sdata->vif);
 795         }
 796
 797         sdata = rcu_dereference_check(local->monitor_sdata,
 798                                       lockdep_is_held(&local->iflist_mtx) ||
 799                                       lockdep_is_held(&local->hw.wiphy->mtx));
 800         if (sdata &&
 801             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 802              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 803                 iterator(data, sdata->vif.addr, &sdata->vif);
 804 }
 805
 806 void ieee80211_iterate_interfaces(
 807         struct ieee80211_hw *hw, u32 iter_flags,
 808         void (*iterator)(void *data, u8 *mac,
 809                          struct ieee80211_vif *vif),
 810         void *data)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813
 814         mutex_lock(&local->iflist_mtx);
 815         __iterate_interfaces(local, iter_flags, iterator, data);
 816         mutex_unlock(&local->iflist_mtx);
 817 }
 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 819
 820 void ieee80211_iterate_active_interfaces_atomic(
 821         struct ieee80211_hw *hw, u32 iter_flags,
 822         void (*iterator)(void *data, u8 *mac,
 823                          struct ieee80211_vif *vif),
 824         void *data)
 825 {
 826         struct ieee80211_local *local = hw_to_local(hw);
 827
 828         rcu_read_lock();
 829         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 830                              iterator, data);
 831         rcu_read_unlock();
 832 }
 833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 834
 835 void ieee80211_iterate_active_interfaces_mtx(
 836         struct ieee80211_hw *hw, u32 iter_flags,
 837         void (*iterator)(void *data, u8 *mac,
 838                          struct ieee80211_vif *vif),
 839         void *data)
 840 {
 841         struct ieee80211_local *local = hw_to_local(hw);
 842
 843         lockdep_assert_wiphy(hw->wiphy);
 844
 845         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 846                              iterator, data);
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 849
 850 static void __iterate_stations(struct ieee80211_local *local,
 851                                void (*iterator)(void *data,
 852                                                 struct ieee80211_sta *sta),
 853                                void *data)
 854 {
 855         struct sta_info *sta;
 856
 857         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 858                 if (!sta->uploaded)
 859                         continue;
 860
 861                 iterator(data, &sta->sta);
 862         }
 863 }
 864
 865 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 866                         void (*iterator)(void *data,
 867                                          struct ieee80211_sta *sta),
 868                         void *data)
 869 {
 870         struct ieee80211_local *local = hw_to_local(hw);
 871
 872         rcu_read_lock();
 873         __iterate_stations(local, iterator, data);
 874         rcu_read_unlock();
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 877
 878 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 879 {
 880         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 881
 882         if (!ieee80211_sdata_running(sdata) ||
 883             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 884                 return NULL;
 885         return &sdata->vif;
 886 }
 887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 888
 889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 890 {
 891         if (!vif)
 892                 return NULL;
 893
 894         return &vif_to_sdata(vif)->wdev;
 895 }
 896 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 897
 898 /*
 899  * Nothing should have been stuffed into the workqueue during
 900  * the suspend->resume cycle. Since we can't check each caller
 901  * of this function if we are already quiescing / suspended,
 902  * check here and don't WARN since this can actually happen when
 903  * the rx path (for example) is racing against __ieee80211_suspend
 904  * and suspending / quiescing was set after the rx path checked
 905  * them.
 906  */
 907 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 908 {
 909         if (local->quiescing || (local->suspended && !local->resuming)) {
 910                 pr_warn("queueing ieee80211 work while going to suspend\n");
 911                 return false;
 912         }
 913
 914         return true;
 915 }
 916
 917 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 918 {
 919         struct ieee80211_local *local = hw_to_local(hw);
 920
 921         if (!ieee80211_can_queue_work(local))
 922                 return;
 923
 924         queue_work(local->workqueue, work);
 925 }
 926 EXPORT_SYMBOL(ieee80211_queue_work);
 927
 928 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 929                                   struct delayed_work *dwork,
 930                                   unsigned long delay)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_delayed_work(local->workqueue, dwork, delay);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 940
 941 static void ieee80211_parse_extension_element(u32 *crc,
 942                                               const struct element *elem,
 943                                               struct ieee802_11_elems *elems)
 944 {
 945         const void *data = elem->data + 1;
 946         u8 len;
 947
 948         if (!elem->datalen)
 949                 return;
 950
 951         len = elem->datalen - 1;
 952
 953         switch (elem->data[0]) {
 954         case WLAN_EID_EXT_HE_MU_EDCA:
 955                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 956                         elems->mu_edca_param_set = data;
 957                         if (crc)
 958                                 *crc = crc32_be(*crc, (void *)elem,
 959                                                 elem->datalen + 2);
 960                 }
 961                 break;
 962         case WLAN_EID_EXT_HE_CAPABILITY:
 963                 elems->he_cap = data;
 964                 elems->he_cap_len = len;
 965                 break;
 966         case WLAN_EID_EXT_HE_OPERATION:
 967                 if (len >= sizeof(*elems->he_operation) &&
 968                     len >= ieee80211_he_oper_size(data) - 1) {
 969                         if (crc)
 970                                 *crc = crc32_be(*crc, (void *)elem,
 971                                                 elem->datalen + 2);
 972                         elems->he_operation = data;
 973                 }
 974                 break;
 975         case WLAN_EID_EXT_UORA:
 976                 if (len >= 1)
 977                         elems->uora_element = data;
 978                 break;
 979         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 980                 if (len == 3)
 981                         elems->max_channel_switch_time = data;
 982                 break;
 983         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 984                 if (len >= sizeof(*elems->mbssid_config_ie))
 985                         elems->mbssid_config_ie = data;
 986                 break;
 987         case WLAN_EID_EXT_HE_SPR:
 988                 if (len >= sizeof(*elems->he_spr) &&
 989                     len >= ieee80211_he_spr_size(data))
 990                         elems->he_spr = data;
 991                 break;
 992         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 993                 if (len >= sizeof(*elems->he_6ghz_capa))
 994                         elems->he_6ghz_capa = data;
 995                 break;
 996         }
 997 }
 998
 999 static u32
1000 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1001                             struct ieee802_11_elems *elems,
1002                             u64 filter, u32 crc,
1003                             const struct element *check_inherit)
1004 {
1005         const struct element *elem;
1006         bool calc_crc = filter != 0;
1007         DECLARE_BITMAP(seen_elems, 256);
1008         const u8 *ie;
1009
1010         bitmap_zero(seen_elems, 256);
1011
1012         for_each_element(elem, start, len) {
1013                 bool elem_parse_failed;
1014                 u8 id = elem->id;
1015                 u8 elen = elem->datalen;
1016                 const u8 *pos = elem->data;
1017
1018                 if (check_inherit &&
1019                     !cfg80211_is_element_inherited(elem,
1020                                                    check_inherit))
1021                         continue;
1022
1023                 switch (id) {
1024                 case WLAN_EID_SSID:
1025                 case WLAN_EID_SUPP_RATES:
1026                 case WLAN_EID_FH_PARAMS:
1027                 case WLAN_EID_DS_PARAMS:
1028                 case WLAN_EID_CF_PARAMS:
1029                 case WLAN_EID_TIM:
1030                 case WLAN_EID_IBSS_PARAMS:
1031                 case WLAN_EID_CHALLENGE:
1032                 case WLAN_EID_RSN:
1033                 case WLAN_EID_ERP_INFO:
1034                 case WLAN_EID_EXT_SUPP_RATES:
1035                 case WLAN_EID_HT_CAPABILITY:
1036                 case WLAN_EID_HT_OPERATION:
1037                 case WLAN_EID_VHT_CAPABILITY:
1038                 case WLAN_EID_VHT_OPERATION:
1039                 case WLAN_EID_MESH_ID:
1040                 case WLAN_EID_MESH_CONFIG:
1041                 case WLAN_EID_PEER_MGMT:
1042                 case WLAN_EID_PREQ:
1043                 case WLAN_EID_PREP:
1044                 case WLAN_EID_PERR:
1045                 case WLAN_EID_RANN:
1046                 case WLAN_EID_CHANNEL_SWITCH:
1047                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1048                 case WLAN_EID_COUNTRY:
1049                 case WLAN_EID_PWR_CONSTRAINT:
1050                 case WLAN_EID_TIMEOUT_INTERVAL:
1051                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1052                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1053                 case WLAN_EID_CHAN_SWITCH_PARAM:
1054                 case WLAN_EID_EXT_CAPABILITY:
1055                 case WLAN_EID_CHAN_SWITCH_TIMING:
1056                 case WLAN_EID_LINK_ID:
1057                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1058                 case WLAN_EID_RSNX:
1059                 case WLAN_EID_S1G_BCN_COMPAT:
1060                 case WLAN_EID_S1G_CAPABILITIES:
1061                 case WLAN_EID_S1G_OPERATION:
1062                 case WLAN_EID_AID_RESPONSE:
1063                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1064                 /*
1065                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1066                  * that if the content gets bigger it might be needed more than once
1067                  */
1068                         if (test_bit(id, seen_elems)) {
1069                                 elems->parse_error = true;
1070                                 continue;
1071                         }
1072                         break;
1073                 }
1074
1075                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1076                         crc = crc32_be(crc, pos - 2, elen + 2);
1077
1078                 elem_parse_failed = false;
1079
1080                 switch (id) {
1081                 case WLAN_EID_LINK_ID:
1082                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1083                                 elem_parse_failed = true;
1084                                 break;
1085                         }
1086                         elems->lnk_id = (void *)(pos - 2);
1087                         break;
1088                 case WLAN_EID_CHAN_SWITCH_TIMING:
1089                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1090                                 elem_parse_failed = true;
1091                                 break;
1092                         }
1093                         elems->ch_sw_timing = (void *)pos;
1094                         break;
1095                 case WLAN_EID_EXT_CAPABILITY:
1096                         elems->ext_capab = pos;
1097                         elems->ext_capab_len = elen;
1098                         break;
1099                 case WLAN_EID_SSID:
1100                         elems->ssid = pos;
1101                         elems->ssid_len = elen;
1102                         break;
1103                 case WLAN_EID_SUPP_RATES:
1104                         elems->supp_rates = pos;
1105                         elems->supp_rates_len = elen;
1106                         break;
1107                 case WLAN_EID_DS_PARAMS:
1108                         if (elen >= 1)
1109                                 elems->ds_params = pos;
1110                         else
1111                                 elem_parse_failed = true;
1112                         break;
1113                 case WLAN_EID_TIM:
1114                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1115                                 elems->tim = (void *)pos;
1116                                 elems->tim_len = elen;
1117                         } else
1118                                 elem_parse_failed = true;
1119                         break;
1120                 case WLAN_EID_CHALLENGE:
1121                         elems->challenge = pos;
1122                         elems->challenge_len = elen;
1123                         break;
1124                 case WLAN_EID_VENDOR_SPECIFIC:
1125                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1126                             pos[2] == 0xf2) {
1127                                 /* Microsoft OUI (00:50:F2) */
1128
1129                                 if (calc_crc)
1130                                         crc = crc32_be(crc, pos - 2, elen + 2);
1131
1132                                 if (elen >= 5 && pos[3] == 2) {
1133                                         /* OUI Type 2 - WMM IE */
1134                                         if (pos[4] == 0) {
1135                                                 elems->wmm_info = pos;
1136                                                 elems->wmm_info_len = elen;
1137                                         } else if (pos[4] == 1) {
1138                                                 elems->wmm_param = pos;
1139                                                 elems->wmm_param_len = elen;
1140                                         }
1141                                 }
1142                         }
1143                         break;
1144                 case WLAN_EID_RSN:
1145                         elems->rsn = pos;
1146                         elems->rsn_len = elen;
1147                         break;
1148                 case WLAN_EID_ERP_INFO:
1149                         if (elen >= 1)
1150                                 elems->erp_info = pos;
1151                         else
1152                                 elem_parse_failed = true;
1153                         break;
1154                 case WLAN_EID_EXT_SUPP_RATES:
1155                         elems->ext_supp_rates = pos;
1156                         elems->ext_supp_rates_len = elen;
1157                         break;
1158                 case WLAN_EID_HT_CAPABILITY:
1159                         if (elen >= sizeof(struct ieee80211_ht_cap))
1160                                 elems->ht_cap_elem = (void *)pos;
1161                         else
1162                                 elem_parse_failed = true;
1163                         break;
1164                 case WLAN_EID_HT_OPERATION:
1165                         if (elen >= sizeof(struct ieee80211_ht_operation))
1166                                 elems->ht_operation = (void *)pos;
1167                         else
1168                                 elem_parse_failed = true;
1169                         break;
1170                 case WLAN_EID_VHT_CAPABILITY:
1171                         if (elen >= sizeof(struct ieee80211_vht_cap))
1172                                 elems->vht_cap_elem = (void *)pos;
1173                         else
1174                                 elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_VHT_OPERATION:
1177                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1178                                 elems->vht_operation = (void *)pos;
1179                                 if (calc_crc)
1180                                         crc = crc32_be(crc, pos - 2, elen + 2);
1181                                 break;
1182                         }
1183                         elem_parse_failed = true;
1184                         break;
1185                 case WLAN_EID_OPMODE_NOTIF:
1186                         if (elen > 0) {
1187                                 elems->opmode_notif = pos;
1188                                 if (calc_crc)
1189                                         crc = crc32_be(crc, pos - 2, elen + 2);
1190                                 break;
1191                         }
1192                         elem_parse_failed = true;
1193                         break;
1194                 case WLAN_EID_MESH_ID:
1195                         elems->mesh_id = pos;
1196                         elems->mesh_id_len = elen;
1197                         break;
1198                 case WLAN_EID_MESH_CONFIG:
1199                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1200                                 elems->mesh_config = (void *)pos;
1201                         else
1202                                 elem_parse_failed = true;
1203                         break;
1204                 case WLAN_EID_PEER_MGMT:
1205                         elems->peering = pos;
1206                         elems->peering_len = elen;
1207                         break;
1208                 case WLAN_EID_MESH_AWAKE_WINDOW:
1209                         if (elen >= 2)
1210                                 elems->awake_window = (void *)pos;
1211                         break;
1212                 case WLAN_EID_PREQ:
1213                         elems->preq = pos;
1214                         elems->preq_len = elen;
1215                         break;
1216                 case WLAN_EID_PREP:
1217                         elems->prep = pos;
1218                         elems->prep_len = elen;
1219                         break;
1220                 case WLAN_EID_PERR:
1221                         elems->perr = pos;
1222                         elems->perr_len = elen;
1223                         break;
1224                 case WLAN_EID_RANN:
1225                         if (elen >= sizeof(struct ieee80211_rann_ie))
1226                                 elems->rann = (void *)pos;
1227                         else
1228                                 elem_parse_failed = true;
1229                         break;
1230                 case WLAN_EID_CHANNEL_SWITCH:
1231                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1232                                 elem_parse_failed = true;
1233                                 break;
1234                         }
1235                         elems->ch_switch_ie = (void *)pos;
1236                         break;
1237                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1238                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1239                                 elem_parse_failed = true;
1240                                 break;
1241                         }
1242                         elems->ext_chansw_ie = (void *)pos;
1243                         break;
1244                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1245                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1246                                 elem_parse_failed = true;
1247                                 break;
1248                         }
1249                         elems->sec_chan_offs = (void *)pos;
1250                         break;
1251                 case WLAN_EID_CHAN_SWITCH_PARAM:
1252                         if (elen <
1253                             sizeof(*elems->mesh_chansw_params_ie)) {
1254                                 elem_parse_failed = true;
1255                                 break;
1256                         }
1257                         elems->mesh_chansw_params_ie = (void *)pos;
1258                         break;
1259                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1260                         if (!action ||
1261                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1262                                 elem_parse_failed = true;
1263                                 break;
1264                         }
1265                         elems->wide_bw_chansw_ie = (void *)pos;
1266                         break;
1267                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1268                         if (action) {
1269                                 elem_parse_failed = true;
1270                                 break;
1271                         }
1272                         /*
1273                          * This is a bit tricky, but as we only care about
1274                          * the wide bandwidth channel switch element, so
1275                          * just parse it out manually.
1276                          */
1277                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1278                                               pos, elen);
1279                         if (ie) {
1280                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1281                                         elems->wide_bw_chansw_ie =
1282                                                 (void *)(ie + 2);
1283                                 else
1284                                         elem_parse_failed = true;
1285                         }
1286                         break;
1287                 case WLAN_EID_COUNTRY:
1288                         elems->country_elem = pos;
1289                         elems->country_elem_len = elen;
1290                         break;
1291                 case WLAN_EID_PWR_CONSTRAINT:
1292                         if (elen != 1) {
1293                                 elem_parse_failed = true;
1294                                 break;
1295                         }
1296                         elems->pwr_constr_elem = pos;
1297                         break;
1298                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1299                         /* Lots of different options exist, but we only care
1300                          * about the Dynamic Transmit Power Control element.
1301                          * First check for the Cisco OUI, then for the DTPC
1302                          * tag (0x00).
1303                          */
1304                         if (elen < 4) {
1305                                 elem_parse_failed = true;
1306                                 break;
1307                         }
1308
1309                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1310                             pos[2] != 0x96 || pos[3] != 0x00)
1311                                 break;
1312
1313                         if (elen != 6) {
1314                                 elem_parse_failed = true;
1315                                 break;
1316                         }
1317
1318                         if (calc_crc)
1319                                 crc = crc32_be(crc, pos - 2, elen + 2);
1320
1321                         elems->cisco_dtpc_elem = pos;
1322                         break;
1323                 case WLAN_EID_ADDBA_EXT:
1324                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1325                                 elem_parse_failed = true;
1326                                 break;
1327                         }
1328                         elems->addba_ext_ie = (void *)pos;
1329                         break;
1330                 case WLAN_EID_TIMEOUT_INTERVAL:
1331                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1332                                 elems->timeout_int = (void *)pos;
1333                         else
1334                                 elem_parse_failed = true;
1335                         break;
1336                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1337                         if (elen >= sizeof(*elems->max_idle_period_ie))
1338                                 elems->max_idle_period_ie = (void *)pos;
1339                         break;
1340                 case WLAN_EID_RSNX:
1341                         elems->rsnx = pos;
1342                         elems->rsnx_len = elen;
1343                         break;
1344                 case WLAN_EID_TX_POWER_ENVELOPE:
1345                         if (elen < 1 ||
1346                             elen > sizeof(struct ieee80211_tx_pwr_env))
1347                                 break;
1348
1349                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1350                                 break;
1351
1352                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1353                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1354                         elems->tx_pwr_env_num++;
1355                         break;
1356                 case WLAN_EID_EXTENSION:
1357                         ieee80211_parse_extension_element(calc_crc ?
1358                                                                 &crc : NULL,
1359                                                           elem, elems);
1360                         break;
1361                 case WLAN_EID_S1G_CAPABILITIES:
1362                         if (elen >= sizeof(*elems->s1g_capab))
1363                                 elems->s1g_capab = (void *)pos;
1364                         else
1365                                 elem_parse_failed = true;
1366                         break;
1367                 case WLAN_EID_S1G_OPERATION:
1368                         if (elen == sizeof(*elems->s1g_oper))
1369                                 elems->s1g_oper = (void *)pos;
1370                         else
1371                                 elem_parse_failed = true;
1372                         break;
1373                 case WLAN_EID_S1G_BCN_COMPAT:
1374                         if (elen == sizeof(*elems->s1g_bcn_compat))
1375                                 elems->s1g_bcn_compat = (void *)pos;
1376                         else
1377                                 elem_parse_failed = true;
1378                         break;
1379                 case WLAN_EID_AID_RESPONSE:
1380                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1381                                 elems->aid_resp = (void *)pos;
1382                         else
1383                                 elem_parse_failed = true;
1384                         break;
1385                 default:
1386                         break;
1387                 }
1388
1389                 if (elem_parse_failed)
1390                         elems->parse_error = true;
1391                 else
1392                         __set_bit(id, seen_elems);
1393         }
1394
1395         if (!for_each_element_completed(elem, start, len))
1396                 elems->parse_error = true;
1397
1398         return crc;
1399 }
1400
1401 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1402                                             struct ieee802_11_elems *elems,
1403                                             u8 *transmitter_bssid,
1404                                             u8 *bss_bssid,
1405                                             u8 *nontransmitted_profile)
1406 {
1407         const struct element *elem, *sub;
1408         size_t profile_len = 0;
1409         bool found = false;
1410
1411         if (!bss_bssid || !transmitter_bssid)
1412                 return profile_len;
1413
1414         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1415                 if (elem->datalen < 2)
1416                         continue;
1417                 if (elem->data[0] < 1 || elem->data[0] > 8)
1418                         continue;
1419
1420                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1421                         u8 new_bssid[ETH_ALEN];
1422                         const u8 *index;
1423
1424                         if (sub->id != 0 || sub->datalen < 4) {
1425                                 /* not a valid BSS profile */
1426                                 continue;
1427                         }
1428
1429                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1430                             sub->data[1] != 2) {
1431                                 /* The first element of the
1432                                  * Nontransmitted BSSID Profile is not
1433                                  * the Nontransmitted BSSID Capability
1434                                  * element.
1435                                  */
1436                                 continue;
1437                         }
1438
1439                         memset(nontransmitted_profile, 0, len);
1440                         profile_len = cfg80211_merge_profile(start, len,
1441                                                              elem,
1442                                                              sub,
1443                                                              nontransmitted_profile,
1444                                                              len);
1445
1446                         /* found a Nontransmitted BSSID Profile */
1447                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1448                                                  nontransmitted_profile,
1449                                                  profile_len);
1450                         if (!index || index[1] < 1 || index[2] == 0) {
1451                                 /* Invalid MBSSID Index element */
1452                                 continue;
1453                         }
1454
1455                         cfg80211_gen_new_bssid(transmitter_bssid,
1456                                                elem->data[0],
1457                                                index[2],
1458                                                new_bssid);
1459                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1460                                 found = true;
1461                                 elems->bssid_index_len = index[1];
1462                                 elems->bssid_index = (void *)&index[2];
1463                                 break;
1464                         }
1465                 }
1466         }
1467
1468         return found ? profile_len : 0;
1469 }
1470
1471 void ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1472                                 struct ieee802_11_elems *elems,
1473                                 u64 filter, u32 crc, u8 *transmitter_bssid,
1474                                 u8 *bss_bssid)
1475 {
1476         const struct element *non_inherit = NULL;
1477         u8 *nontransmitted_profile;
1478         int nontransmitted_profile_len = 0;
1479
1480         memset(elems, 0, sizeof(*elems));
1481         elems->ie_start = start;
1482         elems->total_len = len;
1483
1484         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1485         if (nontransmitted_profile) {
1486                 nontransmitted_profile_len =
1487                         ieee802_11_find_bssid_profile(start, len, elems,
1488                                                       transmitter_bssid,
1489                                                       bss_bssid,
1490                                                       nontransmitted_profile);
1491                 non_inherit =
1492                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1493                                                nontransmitted_profile,
1494                                                nontransmitted_profile_len);
1495         }
1496
1497         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1498                                           crc, non_inherit);
1499
1500         /* Override with nontransmitted profile, if found */
1501         if (nontransmitted_profile_len)
1502                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1503                                             nontransmitted_profile_len,
1504                                             action, elems, 0, 0, NULL);
1505
1506         if (elems->tim && !elems->parse_error) {
1507                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1508
1509                 elems->dtim_period = tim_ie->dtim_period;
1510                 elems->dtim_count = tim_ie->dtim_count;
1511         }
1512
1513         /* Override DTIM period and count if needed */
1514         if (elems->bssid_index &&
1515             elems->bssid_index_len >=
1516             offsetofend(struct ieee80211_bssid_index, dtim_period))
1517                 elems->dtim_period = elems->bssid_index->dtim_period;
1518
1519         if (elems->bssid_index &&
1520             elems->bssid_index_len >=
1521             offsetofend(struct ieee80211_bssid_index, dtim_count))
1522                 elems->dtim_count = elems->bssid_index->dtim_count;
1523
1524         kfree(nontransmitted_profile);
1525
1526         elems->crc = crc;
1527 }
1528
1529 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1530                                            struct ieee80211_tx_queue_params
1531                                            *qparam, int ac)
1532 {
1533         struct ieee80211_chanctx_conf *chanctx_conf;
1534         const struct ieee80211_reg_rule *rrule;
1535         const struct ieee80211_wmm_ac *wmm_ac;
1536         u16 center_freq = 0;
1537
1538         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1539             sdata->vif.type != NL80211_IFTYPE_STATION)
1540                 return;
1541
1542         rcu_read_lock();
1543         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1544         if (chanctx_conf)
1545                 center_freq = chanctx_conf->def.chan->center_freq;
1546
1547         if (!center_freq) {
1548                 rcu_read_unlock();
1549                 return;
1550         }
1551
1552         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1553
1554         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1555                 rcu_read_unlock();
1556                 return;
1557         }
1558
1559         if (sdata->vif.type == NL80211_IFTYPE_AP)
1560                 wmm_ac = &rrule->wmm_rule.ap[ac];
1561         else
1562                 wmm_ac = &rrule->wmm_rule.client[ac];
1563         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1564         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1565         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1566         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1567         rcu_read_unlock();
1568 }
1569
1570 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1571                                bool bss_notify, bool enable_qos)
1572 {
1573         struct ieee80211_local *local = sdata->local;
1574         struct ieee80211_tx_queue_params qparam;
1575         struct ieee80211_chanctx_conf *chanctx_conf;
1576         int ac;
1577         bool use_11b;
1578         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1579         int aCWmin, aCWmax;
1580
1581         if (!local->ops->conf_tx)
1582                 return;
1583
1584         if (local->hw.queues < IEEE80211_NUM_ACS)
1585                 return;
1586
1587         memset(&qparam, 0, sizeof(qparam));
1588
1589         rcu_read_lock();
1590         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1591         use_11b = (chanctx_conf &&
1592                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1593                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1594         rcu_read_unlock();
1595
1596         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1597
1598         /* Set defaults according to 802.11-2007 Table 7-37 */
1599         aCWmax = 1023;
1600         if (use_11b)
1601                 aCWmin = 31;
1602         else
1603                 aCWmin = 15;
1604
1605         /* Confiure old 802.11b/g medium access rules. */
1606         qparam.cw_max = aCWmax;
1607         qparam.cw_min = aCWmin;
1608         qparam.txop = 0;
1609         qparam.aifs = 2;
1610
1611         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1612                 /* Update if QoS is enabled. */
1613                 if (enable_qos) {
1614                         switch (ac) {
1615                         case IEEE80211_AC_BK:
1616                                 qparam.cw_max = aCWmax;
1617                                 qparam.cw_min = aCWmin;
1618                                 qparam.txop = 0;
1619                                 if (is_ocb)
1620                                         qparam.aifs = 9;
1621                                 else
1622                                         qparam.aifs = 7;
1623                                 break;
1624                         /* never happens but let's not leave undefined */
1625                         default:
1626                         case IEEE80211_AC_BE:
1627                                 qparam.cw_max = aCWmax;
1628                                 qparam.cw_min = aCWmin;
1629                                 qparam.txop = 0;
1630                                 if (is_ocb)
1631                                         qparam.aifs = 6;
1632                                 else
1633                                         qparam.aifs = 3;
1634                                 break;
1635                         case IEEE80211_AC_VI:
1636                                 qparam.cw_max = aCWmin;
1637                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1638                                 if (is_ocb)
1639                                         qparam.txop = 0;
1640                                 else if (use_11b)
1641                                         qparam.txop = 6016/32;
1642                                 else
1643                                         qparam.txop = 3008/32;
1644
1645                                 if (is_ocb)
1646                                         qparam.aifs = 3;
1647                                 else
1648                                         qparam.aifs = 2;
1649                                 break;
1650                         case IEEE80211_AC_VO:
1651                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1652                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1653                                 if (is_ocb)
1654                                         qparam.txop = 0;
1655                                 else if (use_11b)
1656                                         qparam.txop = 3264/32;
1657                                 else
1658                                         qparam.txop = 1504/32;
1659                                 qparam.aifs = 2;
1660                                 break;
1661                         }
1662                 }
1663                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1664
1665                 qparam.uapsd = false;
1666
1667                 sdata->tx_conf[ac] = qparam;
1668                 drv_conf_tx(local, sdata, ac, &qparam);
1669         }
1670
1671         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1672             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1673             sdata->vif.type != NL80211_IFTYPE_NAN) {
1674                 sdata->vif.bss_conf.qos = enable_qos;
1675                 if (bss_notify)
1676                         ieee80211_bss_info_change_notify(sdata,
1677                                                          BSS_CHANGED_QOS);
1678         }
1679 }
1680
1681 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1682                          u16 transaction, u16 auth_alg, u16 status,
1683                          const u8 *extra, size_t extra_len, const u8 *da,
1684                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1685                          u32 tx_flags)
1686 {
1687         struct ieee80211_local *local = sdata->local;
1688         struct sk_buff *skb;
1689         struct ieee80211_mgmt *mgmt;
1690         int err;
1691
1692         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1693         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1694                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1695         if (!skb)
1696                 return;
1697
1698         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1699
1700         mgmt = skb_put_zero(skb, 24 + 6);
1701         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1702                                           IEEE80211_STYPE_AUTH);
1703         memcpy(mgmt->da, da, ETH_ALEN);
1704         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1705         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1706         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1707         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1708         mgmt->u.auth.status_code = cpu_to_le16(status);
1709         if (extra)
1710                 skb_put_data(skb, extra, extra_len);
1711
1712         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1713                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1714                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1715                 if (WARN_ON(err)) {
1716                         kfree_skb(skb);
1717                         return;
1718                 }
1719         }
1720
1721         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1722                                         tx_flags;
1723         ieee80211_tx_skb(sdata, skb);
1724 }
1725
1726 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1727                                     const u8 *da, const u8 *bssid,
1728                                     u16 stype, u16 reason,
1729                                     bool send_frame, u8 *frame_buf)
1730 {
1731         struct ieee80211_local *local = sdata->local;
1732         struct sk_buff *skb;
1733         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1734
1735         /* build frame */
1736         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1737         mgmt->duration = 0; /* initialize only */
1738         mgmt->seq_ctrl = 0; /* initialize only */
1739         memcpy(mgmt->da, da, ETH_ALEN);
1740         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1741         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1742         /* u.deauth.reason_code == u.disassoc.reason_code */
1743         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1744
1745         if (send_frame) {
1746                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1747                                     IEEE80211_DEAUTH_FRAME_LEN);
1748                 if (!skb)
1749                         return;
1750
1751                 skb_reserve(skb, local->hw.extra_tx_headroom);
1752
1753                 /* copy in frame */
1754                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1755
1756                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1757                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1758                         IEEE80211_SKB_CB(skb)->flags |=
1759                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1760
1761                 ieee80211_tx_skb(sdata, skb);
1762         }
1763 }
1764
1765 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1766 {
1767         if ((end - pos) < 5)
1768                 return pos;
1769
1770         *pos++ = WLAN_EID_EXTENSION;
1771         *pos++ = 1 + sizeof(cap);
1772         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1773         memcpy(pos, &cap, sizeof(cap));
1774
1775         return pos + 2;
1776 }
1777
1778 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1779                                          u8 *buffer, size_t buffer_len,
1780                                          const u8 *ie, size_t ie_len,
1781                                          enum nl80211_band band,
1782                                          u32 rate_mask,
1783                                          struct cfg80211_chan_def *chandef,
1784                                          size_t *offset, u32 flags)
1785 {
1786         struct ieee80211_local *local = sdata->local;
1787         struct ieee80211_supported_band *sband;
1788         const struct ieee80211_sta_he_cap *he_cap;
1789         u8 *pos = buffer, *end = buffer + buffer_len;
1790         size_t noffset;
1791         int supp_rates_len, i;
1792         u8 rates[32];
1793         int num_rates;
1794         int ext_rates_len;
1795         int shift;
1796         u32 rate_flags;
1797         bool have_80mhz = false;
1798
1799         *offset = 0;
1800
1801         sband = local->hw.wiphy->bands[band];
1802         if (WARN_ON_ONCE(!sband))
1803                 return 0;
1804
1805         rate_flags = ieee80211_chandef_rate_flags(chandef);
1806         shift = ieee80211_chandef_get_shift(chandef);
1807
1808         num_rates = 0;
1809         for (i = 0; i < sband->n_bitrates; i++) {
1810                 if ((BIT(i) & rate_mask) == 0)
1811                         continue; /* skip rate */
1812                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1813                         continue;
1814
1815                 rates[num_rates++] =
1816                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1817                                           (1 << shift) * 5);
1818         }
1819
1820         supp_rates_len = min_t(int, num_rates, 8);
1821
1822         if (end - pos < 2 + supp_rates_len)
1823                 goto out_err;
1824         *pos++ = WLAN_EID_SUPP_RATES;
1825         *pos++ = supp_rates_len;
1826         memcpy(pos, rates, supp_rates_len);
1827         pos += supp_rates_len;
1828
1829         /* insert "request information" if in custom IEs */
1830         if (ie && ie_len) {
1831                 static const u8 before_extrates[] = {
1832                         WLAN_EID_SSID,
1833                         WLAN_EID_SUPP_RATES,
1834                         WLAN_EID_REQUEST,
1835                 };
1836                 noffset = ieee80211_ie_split(ie, ie_len,
1837                                              before_extrates,
1838                                              ARRAY_SIZE(before_extrates),
1839                                              *offset);
1840                 if (end - pos < noffset - *offset)
1841                         goto out_err;
1842                 memcpy(pos, ie + *offset, noffset - *offset);
1843                 pos += noffset - *offset;
1844                 *offset = noffset;
1845         }
1846
1847         ext_rates_len = num_rates - supp_rates_len;
1848         if (ext_rates_len > 0) {
1849                 if (end - pos < 2 + ext_rates_len)
1850                         goto out_err;
1851                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1852                 *pos++ = ext_rates_len;
1853                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1854                 pos += ext_rates_len;
1855         }
1856
1857         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1858                 if (end - pos < 3)
1859                         goto out_err;
1860                 *pos++ = WLAN_EID_DS_PARAMS;
1861                 *pos++ = 1;
1862                 *pos++ = ieee80211_frequency_to_channel(
1863                                 chandef->chan->center_freq);
1864         }
1865
1866         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1867                 goto done;
1868
1869         /* insert custom IEs that go before HT */
1870         if (ie && ie_len) {
1871                 static const u8 before_ht[] = {
1872                         /*
1873                          * no need to list the ones split off already
1874                          * (or generated here)
1875                          */
1876                         WLAN_EID_DS_PARAMS,
1877                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1878                 };
1879                 noffset = ieee80211_ie_split(ie, ie_len,
1880                                              before_ht, ARRAY_SIZE(before_ht),
1881                                              *offset);
1882                 if (end - pos < noffset - *offset)
1883                         goto out_err;
1884                 memcpy(pos, ie + *offset, noffset - *offset);
1885                 pos += noffset - *offset;
1886                 *offset = noffset;
1887         }
1888
1889         if (sband->ht_cap.ht_supported) {
1890                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1891                         goto out_err;
1892                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1893                                                 sband->ht_cap.cap);
1894         }
1895
1896         /* insert custom IEs that go before VHT */
1897         if (ie && ie_len) {
1898                 static const u8 before_vht[] = {
1899                         /*
1900                          * no need to list the ones split off already
1901                          * (or generated here)
1902                          */
1903                         WLAN_EID_BSS_COEX_2040,
1904                         WLAN_EID_EXT_CAPABILITY,
1905                         WLAN_EID_SSID_LIST,
1906                         WLAN_EID_CHANNEL_USAGE,
1907                         WLAN_EID_INTERWORKING,
1908                         WLAN_EID_MESH_ID,
1909                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1910                 };
1911                 noffset = ieee80211_ie_split(ie, ie_len,
1912                                              before_vht, ARRAY_SIZE(before_vht),
1913                                              *offset);
1914                 if (end - pos < noffset - *offset)
1915                         goto out_err;
1916                 memcpy(pos, ie + *offset, noffset - *offset);
1917                 pos += noffset - *offset;
1918                 *offset = noffset;
1919         }
1920
1921         /* Check if any channel in this sband supports at least 80 MHz */
1922         for (i = 0; i < sband->n_channels; i++) {
1923                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1924                                                 IEEE80211_CHAN_NO_80MHZ))
1925                         continue;
1926
1927                 have_80mhz = true;
1928                 break;
1929         }
1930
1931         if (sband->vht_cap.vht_supported && have_80mhz) {
1932                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1933                         goto out_err;
1934                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1935                                                  sband->vht_cap.cap);
1936         }
1937
1938         /* insert custom IEs that go before HE */
1939         if (ie && ie_len) {
1940                 static const u8 before_he[] = {
1941                         /*
1942                          * no need to list the ones split off before VHT
1943                          * or generated here
1944                          */
1945                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1946                         WLAN_EID_AP_CSN,
1947                         /* TODO: add 11ah/11aj/11ak elements */
1948                 };
1949                 noffset = ieee80211_ie_split(ie, ie_len,
1950                                              before_he, ARRAY_SIZE(before_he),
1951                                              *offset);
1952                 if (end - pos < noffset - *offset)
1953                         goto out_err;
1954                 memcpy(pos, ie + *offset, noffset - *offset);
1955                 pos += noffset - *offset;
1956                 *offset = noffset;
1957         }
1958
1959         he_cap = ieee80211_get_he_iftype_cap(sband,
1960                                              ieee80211_vif_type_p2p(&sdata->vif));
1961         if (he_cap &&
1962             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1963                                          IEEE80211_CHAN_NO_HE)) {
1964                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
1965                 if (!pos)
1966                         goto out_err;
1967         }
1968
1969         if (cfg80211_any_usable_channels(local->hw.wiphy,
1970                                          BIT(NL80211_BAND_6GHZ),
1971                                          IEEE80211_CHAN_NO_HE)) {
1972                 struct ieee80211_supported_band *sband6;
1973
1974                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1975                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1976                                 ieee80211_vif_type_p2p(&sdata->vif));
1977
1978                 if (he_cap) {
1979                         enum nl80211_iftype iftype =
1980                                 ieee80211_vif_type_p2p(&sdata->vif);
1981                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1982
1983                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1984                 }
1985         }
1986
1987         /*
1988          * If adding more here, adjust code in main.c
1989          * that calculates local->scan_ies_len.
1990          */
1991
1992         return pos - buffer;
1993  out_err:
1994         WARN_ONCE(1, "not enough space for preq IEs\n");
1995  done:
1996         return pos - buffer;
1997 }
1998
1999 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2000                              size_t buffer_len,
2001                              struct ieee80211_scan_ies *ie_desc,
2002                              const u8 *ie, size_t ie_len,
2003                              u8 bands_used, u32 *rate_masks,
2004                              struct cfg80211_chan_def *chandef,
2005                              u32 flags)
2006 {
2007         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2008         int i;
2009
2010         memset(ie_desc, 0, sizeof(*ie_desc));
2011
2012         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2013                 if (bands_used & BIT(i)) {
2014                         pos += ieee80211_build_preq_ies_band(sdata,
2015                                                              buffer + pos,
2016                                                              buffer_len - pos,
2017                                                              ie, ie_len, i,
2018                                                              rate_masks[i],
2019                                                              chandef,
2020                                                              &custom_ie_offset,
2021                                                              flags);
2022                         ie_desc->ies[i] = buffer + old_pos;
2023                         ie_desc->len[i] = pos - old_pos;
2024                         old_pos = pos;
2025                 }
2026         }
2027
2028         /* add any remaining custom IEs */
2029         if (ie && ie_len) {
2030                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2031                               "not enough space for preq custom IEs\n"))
2032                         return pos;
2033                 memcpy(buffer + pos, ie + custom_ie_offset,
2034                        ie_len - custom_ie_offset);
2035                 ie_desc->common_ies = buffer + pos;
2036                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2037                 pos += ie_len - custom_ie_offset;
2038         }
2039
2040         return pos;
2041 };
2042
2043 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2044                                           const u8 *src, const u8 *dst,
2045                                           u32 ratemask,
2046                                           struct ieee80211_channel *chan,
2047                                           const u8 *ssid, size_t ssid_len,
2048                                           const u8 *ie, size_t ie_len,
2049                                           u32 flags)
2050 {
2051         struct ieee80211_local *local = sdata->local;
2052         struct cfg80211_chan_def chandef;
2053         struct sk_buff *skb;
2054         struct ieee80211_mgmt *mgmt;
2055         int ies_len;
2056         u32 rate_masks[NUM_NL80211_BANDS] = {};
2057         struct ieee80211_scan_ies dummy_ie_desc;
2058
2059         /*
2060          * Do not send DS Channel parameter for directed probe requests
2061          * in order to maximize the chance that we get a response.  Some
2062          * badly-behaved APs don't respond when this parameter is included.
2063          */
2064         chandef.width = sdata->vif.bss_conf.chandef.width;
2065         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2066                 chandef.chan = NULL;
2067         else
2068                 chandef.chan = chan;
2069
2070         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2071                                      100 + ie_len);
2072         if (!skb)
2073                 return NULL;
2074
2075         rate_masks[chan->band] = ratemask;
2076         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2077                                            skb_tailroom(skb), &dummy_ie_desc,
2078                                            ie, ie_len, BIT(chan->band),
2079                                            rate_masks, &chandef, flags);
2080         skb_put(skb, ies_len);
2081
2082         if (dst) {
2083                 mgmt = (struct ieee80211_mgmt *) skb->data;
2084                 memcpy(mgmt->da, dst, ETH_ALEN);
2085                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2086         }
2087
2088         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2089
2090         return skb;
2091 }
2092
2093 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2094                             struct ieee802_11_elems *elems,
2095                             enum nl80211_band band, u32 *basic_rates)
2096 {
2097         struct ieee80211_supported_band *sband;
2098         size_t num_rates;
2099         u32 supp_rates, rate_flags;
2100         int i, j, shift;
2101
2102         sband = sdata->local->hw.wiphy->bands[band];
2103         if (WARN_ON(!sband))
2104                 return 1;
2105
2106         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2107         shift = ieee80211_vif_get_shift(&sdata->vif);
2108
2109         num_rates = sband->n_bitrates;
2110         supp_rates = 0;
2111         for (i = 0; i < elems->supp_rates_len +
2112                      elems->ext_supp_rates_len; i++) {
2113                 u8 rate = 0;
2114                 int own_rate;
2115                 bool is_basic;
2116                 if (i < elems->supp_rates_len)
2117                         rate = elems->supp_rates[i];
2118                 else if (elems->ext_supp_rates)
2119                         rate = elems->ext_supp_rates
2120                                 [i - elems->supp_rates_len];
2121                 own_rate = 5 * (rate & 0x7f);
2122                 is_basic = !!(rate & 0x80);
2123
2124                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2125                         continue;
2126
2127                 for (j = 0; j < num_rates; j++) {
2128                         int brate;
2129                         if ((rate_flags & sband->bitrates[j].flags)
2130                             != rate_flags)
2131                                 continue;
2132
2133                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2134                                              1 << shift);
2135
2136                         if (brate == own_rate) {
2137                                 supp_rates |= BIT(j);
2138                                 if (basic_rates && is_basic)
2139                                         *basic_rates |= BIT(j);
2140                         }
2141                 }
2142         }
2143         return supp_rates;
2144 }
2145
2146 void ieee80211_stop_device(struct ieee80211_local *local)
2147 {
2148         ieee80211_led_radio(local, false);
2149         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2150
2151         cancel_work_sync(&local->reconfig_filter);
2152
2153         flush_workqueue(local->workqueue);
2154         drv_stop(local);
2155 }
2156
2157 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2158                                            bool aborted)
2159 {
2160         /* It's possible that we don't handle the scan completion in
2161          * time during suspend, so if it's still marked as completed
2162          * here, queue the work and flush it to clean things up.
2163          * Instead of calling the worker function directly here, we
2164          * really queue it to avoid potential races with other flows
2165          * scheduling the same work.
2166          */
2167         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2168                 /* If coming from reconfiguration failure, abort the scan so
2169                  * we don't attempt to continue a partial HW scan - which is
2170                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2171                  * completed scan, and a 5 GHz portion is still pending.
2172                  */
2173                 if (aborted)
2174                         set_bit(SCAN_ABORTED, &local->scanning);
2175                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2176                 flush_delayed_work(&local->scan_work);
2177         }
2178 }
2179
2180 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2181 {
2182         struct ieee80211_sub_if_data *sdata;
2183         struct ieee80211_chanctx *ctx;
2184
2185         /*
2186          * We get here if during resume the device can't be restarted properly.
2187          * We might also get here if this happens during HW reset, which is a
2188          * slightly different situation and we need to drop all connections in
2189          * the latter case.
2190          *
2191          * Ask cfg80211 to turn off all interfaces, this will result in more
2192          * warnings but at least we'll then get into a clean stopped state.
2193          */
2194
2195         local->resuming = false;
2196         local->suspended = false;
2197         local->in_reconfig = false;
2198
2199         ieee80211_flush_completed_scan(local, true);
2200
2201         /* scheduled scan clearly can't be running any more, but tell
2202          * cfg80211 and clear local state
2203          */
2204         ieee80211_sched_scan_end(local);
2205
2206         list_for_each_entry(sdata, &local->interfaces, list)
2207                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2208
2209         /* Mark channel contexts as not being in the driver any more to avoid
2210          * removing them from the driver during the shutdown process...
2211          */
2212         mutex_lock(&local->chanctx_mtx);
2213         list_for_each_entry(ctx, &local->chanctx_list, list)
2214                 ctx->driver_present = false;
2215         mutex_unlock(&local->chanctx_mtx);
2216 }
2217
2218 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2219                                      struct ieee80211_sub_if_data *sdata)
2220 {
2221         struct ieee80211_chanctx_conf *conf;
2222         struct ieee80211_chanctx *ctx;
2223
2224         if (!local->use_chanctx)
2225                 return;
2226
2227         mutex_lock(&local->chanctx_mtx);
2228         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2229                                          lockdep_is_held(&local->chanctx_mtx));
2230         if (conf) {
2231                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2232                 drv_assign_vif_chanctx(local, sdata, ctx);
2233         }
2234         mutex_unlock(&local->chanctx_mtx);
2235 }
2236
2237 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2238 {
2239         struct ieee80211_local *local = sdata->local;
2240         struct sta_info *sta;
2241
2242         /* add STAs back */
2243         mutex_lock(&local->sta_mtx);
2244         list_for_each_entry(sta, &local->sta_list, list) {
2245                 enum ieee80211_sta_state state;
2246
2247                 if (!sta->uploaded || sta->sdata != sdata)
2248                         continue;
2249
2250                 for (state = IEEE80211_STA_NOTEXIST;
2251                      state < sta->sta_state; state++)
2252                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2253                                               state + 1));
2254         }
2255         mutex_unlock(&local->sta_mtx);
2256 }
2257
2258 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2259 {
2260         struct cfg80211_nan_func *func, **funcs;
2261         int res, id, i = 0;
2262
2263         res = drv_start_nan(sdata->local, sdata,
2264                             &sdata->u.nan.conf);
2265         if (WARN_ON(res))
2266                 return res;
2267
2268         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2269                         sizeof(*funcs),
2270                         GFP_KERNEL);
2271         if (!funcs)
2272                 return -ENOMEM;
2273
2274         /* Add all the functions:
2275          * This is a little bit ugly. We need to call a potentially sleeping
2276          * callback for each NAN function, so we can't hold the spinlock.
2277          */
2278         spin_lock_bh(&sdata->u.nan.func_lock);
2279
2280         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2281                 funcs[i++] = func;
2282
2283         spin_unlock_bh(&sdata->u.nan.func_lock);
2284
2285         for (i = 0; funcs[i]; i++) {
2286                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2287                 if (WARN_ON(res))
2288                         ieee80211_nan_func_terminated(&sdata->vif,
2289                                                       funcs[i]->instance_id,
2290                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2291                                                       GFP_KERNEL);
2292         }
2293
2294         kfree(funcs);
2295
2296         return 0;
2297 }
2298
2299 int ieee80211_reconfig(struct ieee80211_local *local)
2300 {
2301         struct ieee80211_hw *hw = &local->hw;
2302         struct ieee80211_sub_if_data *sdata;
2303         struct ieee80211_chanctx *ctx;
2304         struct sta_info *sta;
2305         int res, i;
2306         bool reconfig_due_to_wowlan = false;
2307         struct ieee80211_sub_if_data *sched_scan_sdata;
2308         struct cfg80211_sched_scan_request *sched_scan_req;
2309         bool sched_scan_stopped = false;
2310         bool suspended = local->suspended;
2311
2312         /* nothing to do if HW shouldn't run */
2313         if (!local->open_count)
2314                 goto wake_up;
2315
2316 #ifdef CONFIG_PM
2317         if (suspended)
2318                 local->resuming = true;
2319
2320         if (local->wowlan) {
2321                 /*
2322                  * In the wowlan case, both mac80211 and the device
2323                  * are functional when the resume op is called, so
2324                  * clear local->suspended so the device could operate
2325                  * normally (e.g. pass rx frames).
2326                  */
2327                 local->suspended = false;
2328                 res = drv_resume(local);
2329                 local->wowlan = false;
2330                 if (res < 0) {
2331                         local->resuming = false;
2332                         return res;
2333                 }
2334                 if (res == 0)
2335                         goto wake_up;
2336                 WARN_ON(res > 1);
2337                 /*
2338                  * res is 1, which means the driver requested
2339                  * to go through a regular reset on wakeup.
2340                  * restore local->suspended in this case.
2341                  */
2342                 reconfig_due_to_wowlan = true;
2343                 local->suspended = true;
2344         }
2345 #endif
2346
2347         /*
2348          * In case of hw_restart during suspend (without wowlan),
2349          * cancel restart work, as we are reconfiguring the device
2350          * anyway.
2351          * Note that restart_work is scheduled on a frozen workqueue,
2352          * so we can't deadlock in this case.
2353          */
2354         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2355                 cancel_work_sync(&local->restart_work);
2356
2357         local->started = false;
2358
2359         /*
2360          * Upon resume hardware can sometimes be goofy due to
2361          * various platform / driver / bus issues, so restarting
2362          * the device may at times not work immediately. Propagate
2363          * the error.
2364          */
2365         res = drv_start(local);
2366         if (res) {
2367                 if (suspended)
2368                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2369                 else
2370                         WARN(1, "Hardware became unavailable during restart.\n");
2371                 ieee80211_handle_reconfig_failure(local);
2372                 return res;
2373         }
2374
2375         /* setup fragmentation threshold */
2376         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2377
2378         /* setup RTS threshold */
2379         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2380
2381         /* reset coverage class */
2382         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2383
2384         ieee80211_led_radio(local, true);
2385         ieee80211_mod_tpt_led_trig(local,
2386                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2387
2388         /* add interfaces */
2389         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2390         if (sdata) {
2391                 /* in HW restart it exists already */
2392                 WARN_ON(local->resuming);
2393                 res = drv_add_interface(local, sdata);
2394                 if (WARN_ON(res)) {
2395                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2396                         synchronize_net();
2397                         kfree(sdata);
2398                 }
2399         }
2400
2401         list_for_each_entry(sdata, &local->interfaces, list) {
2402                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2403                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2404                     ieee80211_sdata_running(sdata)) {
2405                         res = drv_add_interface(local, sdata);
2406                         if (WARN_ON(res))
2407                                 break;
2408                 }
2409         }
2410
2411         /* If adding any of the interfaces failed above, roll back and
2412          * report failure.
2413          */
2414         if (res) {
2415                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2416                                                      list)
2417                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2418                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2419                             ieee80211_sdata_running(sdata))
2420                                 drv_remove_interface(local, sdata);
2421                 ieee80211_handle_reconfig_failure(local);
2422                 return res;
2423         }
2424
2425         /* add channel contexts */
2426         if (local->use_chanctx) {
2427                 mutex_lock(&local->chanctx_mtx);
2428                 list_for_each_entry(ctx, &local->chanctx_list, list)
2429                         if (ctx->replace_state !=
2430                             IEEE80211_CHANCTX_REPLACES_OTHER)
2431                                 WARN_ON(drv_add_chanctx(local, ctx));
2432                 mutex_unlock(&local->chanctx_mtx);
2433
2434                 sdata = wiphy_dereference(local->hw.wiphy,
2435                                           local->monitor_sdata);
2436                 if (sdata && ieee80211_sdata_running(sdata))
2437                         ieee80211_assign_chanctx(local, sdata);
2438         }
2439
2440         /* reconfigure hardware */
2441         ieee80211_hw_config(local, ~0);
2442
2443         ieee80211_configure_filter(local);
2444
2445         /* Finally also reconfigure all the BSS information */
2446         list_for_each_entry(sdata, &local->interfaces, list) {
2447                 u32 changed;
2448
2449                 if (!ieee80211_sdata_running(sdata))
2450                         continue;
2451
2452                 ieee80211_assign_chanctx(local, sdata);
2453
2454                 switch (sdata->vif.type) {
2455                 case NL80211_IFTYPE_AP_VLAN:
2456                 case NL80211_IFTYPE_MONITOR:
2457                         break;
2458                 case NL80211_IFTYPE_ADHOC:
2459                         if (sdata->vif.bss_conf.ibss_joined)
2460                                 WARN_ON(drv_join_ibss(local, sdata));
2461                         fallthrough;
2462                 default:
2463                         ieee80211_reconfig_stations(sdata);
2464                         fallthrough;
2465                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2466                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2467                                 drv_conf_tx(local, sdata, i,
2468                                             &sdata->tx_conf[i]);
2469                         break;
2470                 }
2471
2472                 /* common change flags for all interface types */
2473                 changed = BSS_CHANGED_ERP_CTS_PROT |
2474                           BSS_CHANGED_ERP_PREAMBLE |
2475                           BSS_CHANGED_ERP_SLOT |
2476                           BSS_CHANGED_HT |
2477                           BSS_CHANGED_BASIC_RATES |
2478                           BSS_CHANGED_BEACON_INT |
2479                           BSS_CHANGED_BSSID |
2480                           BSS_CHANGED_CQM |
2481                           BSS_CHANGED_QOS |
2482                           BSS_CHANGED_IDLE |
2483                           BSS_CHANGED_TXPOWER |
2484                           BSS_CHANGED_MCAST_RATE;
2485
2486                 if (sdata->vif.mu_mimo_owner)
2487                         changed |= BSS_CHANGED_MU_GROUPS;
2488
2489                 switch (sdata->vif.type) {
2490                 case NL80211_IFTYPE_STATION:
2491                         changed |= BSS_CHANGED_ASSOC |
2492                                    BSS_CHANGED_ARP_FILTER |
2493                                    BSS_CHANGED_PS;
2494
2495                         /* Re-send beacon info report to the driver */
2496                         if (sdata->u.mgd.have_beacon)
2497                                 changed |= BSS_CHANGED_BEACON_INFO;
2498
2499                         if (sdata->vif.bss_conf.max_idle_period ||
2500                             sdata->vif.bss_conf.protected_keep_alive)
2501                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2502
2503                         sdata_lock(sdata);
2504                         ieee80211_bss_info_change_notify(sdata, changed);
2505                         sdata_unlock(sdata);
2506                         break;
2507                 case NL80211_IFTYPE_OCB:
2508                         changed |= BSS_CHANGED_OCB;
2509                         ieee80211_bss_info_change_notify(sdata, changed);
2510                         break;
2511                 case NL80211_IFTYPE_ADHOC:
2512                         changed |= BSS_CHANGED_IBSS;
2513                         fallthrough;
2514                 case NL80211_IFTYPE_AP:
2515                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2516
2517                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2518                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2519                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2520                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2521
2522                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2523                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2524
2525                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2526                                         drv_start_ap(local, sdata);
2527                         }
2528                         fallthrough;
2529                 case NL80211_IFTYPE_MESH_POINT:
2530                         if (sdata->vif.bss_conf.enable_beacon) {
2531                                 changed |= BSS_CHANGED_BEACON |
2532                                            BSS_CHANGED_BEACON_ENABLED;
2533                                 ieee80211_bss_info_change_notify(sdata, changed);
2534                         }
2535                         break;
2536                 case NL80211_IFTYPE_NAN:
2537                         res = ieee80211_reconfig_nan(sdata);
2538                         if (res < 0) {
2539                                 ieee80211_handle_reconfig_failure(local);
2540                                 return res;
2541                         }
2542                         break;
2543                 case NL80211_IFTYPE_AP_VLAN:
2544                 case NL80211_IFTYPE_MONITOR:
2545                 case NL80211_IFTYPE_P2P_DEVICE:
2546                         /* nothing to do */
2547                         break;
2548                 case NL80211_IFTYPE_UNSPECIFIED:
2549                 case NUM_NL80211_IFTYPES:
2550                 case NL80211_IFTYPE_P2P_CLIENT:
2551                 case NL80211_IFTYPE_P2P_GO:
2552                 case NL80211_IFTYPE_WDS:
2553                         WARN_ON(1);
2554                         break;
2555                 }
2556         }
2557
2558         ieee80211_recalc_ps(local);
2559
2560         /*
2561          * The sta might be in psm against the ap (e.g. because
2562          * this was the state before a hw restart), so we
2563          * explicitly send a null packet in order to make sure
2564          * it'll sync against the ap (and get out of psm).
2565          */
2566         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2567                 list_for_each_entry(sdata, &local->interfaces, list) {
2568                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2569                                 continue;
2570                         if (!sdata->u.mgd.associated)
2571                                 continue;
2572
2573                         ieee80211_send_nullfunc(local, sdata, false);
2574                 }
2575         }
2576
2577         /* APs are now beaconing, add back stations */
2578         mutex_lock(&local->sta_mtx);
2579         list_for_each_entry(sta, &local->sta_list, list) {
2580                 enum ieee80211_sta_state state;
2581
2582                 if (!sta->uploaded)
2583                         continue;
2584
2585                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2586                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2587                         continue;
2588
2589                 for (state = IEEE80211_STA_NOTEXIST;
2590                      state < sta->sta_state; state++)
2591                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2592                                               state + 1));
2593         }
2594         mutex_unlock(&local->sta_mtx);
2595
2596         /* add back keys */
2597         list_for_each_entry(sdata, &local->interfaces, list)
2598                 ieee80211_reenable_keys(sdata);
2599
2600         /* Reconfigure sched scan if it was interrupted by FW restart */
2601         mutex_lock(&local->mtx);
2602         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2603                                                 lockdep_is_held(&local->mtx));
2604         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2605                                                 lockdep_is_held(&local->mtx));
2606         if (sched_scan_sdata && sched_scan_req)
2607                 /*
2608                  * Sched scan stopped, but we don't want to report it. Instead,
2609                  * we're trying to reschedule. However, if more than one scan
2610                  * plan was set, we cannot reschedule since we don't know which
2611                  * scan plan was currently running (and some scan plans may have
2612                  * already finished).
2613                  */
2614                 if (sched_scan_req->n_scan_plans > 1 ||
2615                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2616                                                          sched_scan_req)) {
2617                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2618                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2619                         sched_scan_stopped = true;
2620                 }
2621         mutex_unlock(&local->mtx);
2622
2623         if (sched_scan_stopped)
2624                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2625
2626  wake_up:
2627
2628         if (local->monitors == local->open_count && local->monitors > 0)
2629                 ieee80211_add_virtual_monitor(local);
2630
2631         /*
2632          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2633          * sessions can be established after a resume.
2634          *
2635          * Also tear down aggregation sessions since reconfiguring
2636          * them in a hardware restart scenario is not easily done
2637          * right now, and the hardware will have lost information
2638          * about the sessions, but we and the AP still think they
2639          * are active. This is really a workaround though.
2640          */
2641         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2642                 mutex_lock(&local->sta_mtx);
2643
2644                 list_for_each_entry(sta, &local->sta_list, list) {
2645                         if (!local->resuming)
2646                                 ieee80211_sta_tear_down_BA_sessions(
2647                                                 sta, AGG_STOP_LOCAL_REQUEST);
2648                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2649                 }
2650
2651                 mutex_unlock(&local->sta_mtx);
2652         }
2653
2654         if (local->in_reconfig) {
2655                 local->in_reconfig = false;
2656                 barrier();
2657
2658                 /* Restart deferred ROCs */
2659                 mutex_lock(&local->mtx);
2660                 ieee80211_start_next_roc(local);
2661                 mutex_unlock(&local->mtx);
2662
2663                 /* Requeue all works */
2664                 list_for_each_entry(sdata, &local->interfaces, list)
2665                         ieee80211_queue_work(&local->hw, &sdata->work);
2666         }
2667
2668         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2669                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2670                                         false);
2671
2672         /*
2673          * If this is for hw restart things are still running.
2674          * We may want to change that later, however.
2675          */
2676         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2677                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2678
2679         if (!suspended)
2680                 return 0;
2681
2682 #ifdef CONFIG_PM
2683         /* first set suspended false, then resuming */
2684         local->suspended = false;
2685         mb();
2686         local->resuming = false;
2687
2688         ieee80211_flush_completed_scan(local, false);
2689
2690         if (local->open_count && !reconfig_due_to_wowlan)
2691                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2692
2693         list_for_each_entry(sdata, &local->interfaces, list) {
2694                 if (!ieee80211_sdata_running(sdata))
2695                         continue;
2696                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2697                         ieee80211_sta_restart(sdata);
2698         }
2699
2700         mod_timer(&local->sta_cleanup, jiffies + 1);
2701 #else
2702         WARN_ON(1);
2703 #endif
2704
2705         return 0;
2706 }
2707
2708 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2709 {
2710         struct ieee80211_sub_if_data *sdata;
2711         struct ieee80211_local *local;
2712         struct ieee80211_key *key;
2713
2714         if (WARN_ON(!vif))
2715                 return;
2716
2717         sdata = vif_to_sdata(vif);
2718         local = sdata->local;
2719
2720         if (WARN_ON(!local->resuming))
2721                 return;
2722
2723         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2724                 return;
2725
2726         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2727
2728         mutex_lock(&local->key_mtx);
2729         list_for_each_entry(key, &sdata->key_list, list)
2730                 key->flags |= KEY_FLAG_TAINTED;
2731         mutex_unlock(&local->key_mtx);
2732 }
2733 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2734
2735 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2736 {
2737         struct ieee80211_local *local = sdata->local;
2738         struct ieee80211_chanctx_conf *chanctx_conf;
2739         struct ieee80211_chanctx *chanctx;
2740
2741         mutex_lock(&local->chanctx_mtx);
2742
2743         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2744                                         lockdep_is_held(&local->chanctx_mtx));
2745
2746         /*
2747          * This function can be called from a work, thus it may be possible
2748          * that the chanctx_conf is removed (due to a disconnection, for
2749          * example).
2750          * So nothing should be done in such case.
2751          */
2752         if (!chanctx_conf)
2753                 goto unlock;
2754
2755         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2756         ieee80211_recalc_smps_chanctx(local, chanctx);
2757  unlock:
2758         mutex_unlock(&local->chanctx_mtx);
2759 }
2760
2761 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2762 {
2763         struct ieee80211_local *local = sdata->local;
2764         struct ieee80211_chanctx_conf *chanctx_conf;
2765         struct ieee80211_chanctx *chanctx;
2766
2767         mutex_lock(&local->chanctx_mtx);
2768
2769         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2770                                         lockdep_is_held(&local->chanctx_mtx));
2771
2772         if (WARN_ON_ONCE(!chanctx_conf))
2773                 goto unlock;
2774
2775         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2776         ieee80211_recalc_chanctx_min_def(local, chanctx);
2777  unlock:
2778         mutex_unlock(&local->chanctx_mtx);
2779 }
2780
2781 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2782 {
2783         size_t pos = offset;
2784
2785         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2786                 pos += 2 + ies[pos + 1];
2787
2788         return pos;
2789 }
2790
2791 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2792                                             int rssi_min_thold,
2793                                             int rssi_max_thold)
2794 {
2795         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2796
2797         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2798                 return;
2799
2800         /*
2801          * Scale up threshold values before storing it, as the RSSI averaging
2802          * algorithm uses a scaled up value as well. Change this scaling
2803          * factor if the RSSI averaging algorithm changes.
2804          */
2805         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2806         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2807 }
2808
2809 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2810                                     int rssi_min_thold,
2811                                     int rssi_max_thold)
2812 {
2813         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2814
2815         WARN_ON(rssi_min_thold == rssi_max_thold ||
2816                 rssi_min_thold > rssi_max_thold);
2817
2818         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2819                                        rssi_max_thold);
2820 }
2821 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2822
2823 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2824 {
2825         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2826
2827         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2828 }
2829 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2830
2831 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2832                               u16 cap)
2833 {
2834         __le16 tmp;
2835
2836         *pos++ = WLAN_EID_HT_CAPABILITY;
2837         *pos++ = sizeof(struct ieee80211_ht_cap);
2838         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2839
2840         /* capability flags */
2841         tmp = cpu_to_le16(cap);
2842         memcpy(pos, &tmp, sizeof(u16));
2843         pos += sizeof(u16);
2844
2845         /* AMPDU parameters */
2846         *pos++ = ht_cap->ampdu_factor |
2847                  (ht_cap->ampdu_density <<
2848                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2849
2850         /* MCS set */
2851         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2852         pos += sizeof(ht_cap->mcs);
2853
2854         /* extended capabilities */
2855         pos += sizeof(__le16);
2856
2857         /* BF capabilities */
2858         pos += sizeof(__le32);
2859
2860         /* antenna selection */
2861         pos += sizeof(u8);
2862
2863         return pos;
2864 }
2865
2866 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2867                                u32 cap)
2868 {
2869         __le32 tmp;
2870
2871         *pos++ = WLAN_EID_VHT_CAPABILITY;
2872         *pos++ = sizeof(struct ieee80211_vht_cap);
2873         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2874
2875         /* capability flags */
2876         tmp = cpu_to_le32(cap);
2877         memcpy(pos, &tmp, sizeof(u32));
2878         pos += sizeof(u32);
2879
2880         /* VHT MCS set */
2881         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2882         pos += sizeof(vht_cap->vht_mcs);
2883
2884         return pos;
2885 }
2886
2887 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2888 {
2889         const struct ieee80211_sta_he_cap *he_cap;
2890         struct ieee80211_supported_band *sband;
2891         u8 n;
2892
2893         sband = ieee80211_get_sband(sdata);
2894         if (!sband)
2895                 return 0;
2896
2897         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2898         if (!he_cap)
2899                 return 0;
2900
2901         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2902         return 2 + 1 +
2903                sizeof(he_cap->he_cap_elem) + n +
2904                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2905                                      he_cap->he_cap_elem.phy_cap_info);
2906 }
2907
2908 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2909                               const struct ieee80211_sta_he_cap *he_cap,
2910                               u8 *end)
2911 {
2912         struct ieee80211_he_cap_elem elem;
2913         u8 n;
2914         u8 ie_len;
2915         u8 *orig_pos = pos;
2916
2917         /* Make sure we have place for the IE */
2918         /*
2919          * TODO: the 1 added is because this temporarily is under the EXTENSION
2920          * IE. Get rid of it when it moves.
2921          */
2922         if (!he_cap)
2923                 return orig_pos;
2924
2925         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2926         elem = he_cap->he_cap_elem;
2927
2928         if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
2929                 elem.phy_cap_info[0] &=
2930                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2931                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2932
2933         if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
2934                 elem.phy_cap_info[0] &=
2935                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
2936
2937         if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
2938                 elem.phy_cap_info[0] &=
2939                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
2940
2941         n = ieee80211_he_mcs_nss_size(&elem);
2942         ie_len = 2 + 1 +
2943                  sizeof(he_cap->he_cap_elem) + n +
2944                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2945                                        he_cap->he_cap_elem.phy_cap_info);
2946
2947         if ((end - pos) < ie_len)
2948                 return orig_pos;
2949
2950         *pos++ = WLAN_EID_EXTENSION;
2951         pos++; /* We'll set the size later below */
2952         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2953
2954         /* Fixed data */
2955         memcpy(pos, &elem, sizeof(elem));
2956         pos += sizeof(elem);
2957
2958         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2959         pos += n;
2960
2961         /* Check if PPE Threshold should be present */
2962         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2963              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2964                 goto end;
2965
2966         /*
2967          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2968          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2969          */
2970         n = hweight8(he_cap->ppe_thres[0] &
2971                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2972         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2973                    IEEE80211_PPE_THRES_NSS_POS));
2974
2975         /*
2976          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2977          * total size.
2978          */
2979         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2980         n = DIV_ROUND_UP(n, 8);
2981
2982         /* Copy PPE Thresholds */
2983         memcpy(pos, &he_cap->ppe_thres, n);
2984         pos += n;
2985
2986 end:
2987         orig_pos[1] = (pos - orig_pos) - 2;
2988         return pos;
2989 }
2990
2991 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2992                                     struct sk_buff *skb)
2993 {
2994         struct ieee80211_supported_band *sband;
2995         const struct ieee80211_sband_iftype_data *iftd;
2996         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2997         u8 *pos;
2998         u16 cap;
2999
3000         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3001                                           BIT(NL80211_BAND_6GHZ),
3002                                           IEEE80211_CHAN_NO_HE))
3003                 return;
3004
3005         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3006
3007         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3008         if (!iftd)
3009                 return;
3010
3011         /* Check for device HE 6 GHz capability before adding element */
3012         if (!iftd->he_6ghz_capa.capa)
3013                 return;
3014
3015         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3016         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3017
3018         switch (sdata->smps_mode) {
3019         case IEEE80211_SMPS_AUTOMATIC:
3020         case IEEE80211_SMPS_NUM_MODES:
3021                 WARN_ON(1);
3022                 fallthrough;
3023         case IEEE80211_SMPS_OFF:
3024                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3025                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3026                 break;
3027         case IEEE80211_SMPS_STATIC:
3028                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3029                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3030                 break;
3031         case IEEE80211_SMPS_DYNAMIC:
3032                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3033                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3034                 break;
3035         }
3036
3037         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3038         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3039                                     pos + 2 + 1 + sizeof(cap));
3040 }
3041
3042 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3043                                const struct cfg80211_chan_def *chandef,
3044                                u16 prot_mode, bool rifs_mode)
3045 {
3046         struct ieee80211_ht_operation *ht_oper;
3047         /* Build HT Information */
3048         *pos++ = WLAN_EID_HT_OPERATION;
3049         *pos++ = sizeof(struct ieee80211_ht_operation);
3050         ht_oper = (struct ieee80211_ht_operation *)pos;
3051         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3052                                         chandef->chan->center_freq);
3053         switch (chandef->width) {
3054         case NL80211_CHAN_WIDTH_160:
3055         case NL80211_CHAN_WIDTH_80P80:
3056         case NL80211_CHAN_WIDTH_80:
3057         case NL80211_CHAN_WIDTH_40:
3058                 if (chandef->center_freq1 > chandef->chan->center_freq)
3059                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3060                 else
3061                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3062                 break;
3063         default:
3064                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3065                 break;
3066         }
3067         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3068             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3069             chandef->width != NL80211_CHAN_WIDTH_20)
3070                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3071
3072         if (rifs_mode)
3073                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3074
3075         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3076         ht_oper->stbc_param = 0x0000;
3077
3078         /* It seems that Basic MCS set and Supported MCS set
3079            are identical for the first 10 bytes */
3080         memset(&ht_oper->basic_set, 0, 16);
3081         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3082
3083         return pos + sizeof(struct ieee80211_ht_operation);
3084 }
3085
3086 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3087                                    const struct cfg80211_chan_def *chandef)
3088 {
3089         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3090         *pos++ = 3;                                     /* IE length */
3091         /* New channel width */
3092         switch (chandef->width) {
3093         case NL80211_CHAN_WIDTH_80:
3094                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3095                 break;
3096         case NL80211_CHAN_WIDTH_160:
3097                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3098                 break;
3099         case NL80211_CHAN_WIDTH_80P80:
3100                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3101                 break;
3102         default:
3103                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3104         }
3105
3106         /* new center frequency segment 0 */
3107         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3108         /* new center frequency segment 1 */
3109         if (chandef->center_freq2)
3110                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3111         else
3112                 *pos++ = 0;
3113 }
3114
3115 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3116                                 const struct cfg80211_chan_def *chandef)
3117 {
3118         struct ieee80211_vht_operation *vht_oper;
3119
3120         *pos++ = WLAN_EID_VHT_OPERATION;
3121         *pos++ = sizeof(struct ieee80211_vht_operation);
3122         vht_oper = (struct ieee80211_vht_operation *)pos;
3123         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3124                                                         chandef->center_freq1);
3125         if (chandef->center_freq2)
3126                 vht_oper->center_freq_seg1_idx =
3127                         ieee80211_frequency_to_channel(chandef->center_freq2);
3128         else
3129                 vht_oper->center_freq_seg1_idx = 0x00;
3130
3131         switch (chandef->width) {
3132         case NL80211_CHAN_WIDTH_160:
3133                 /*
3134                  * Convert 160 MHz channel width to new style as interop
3135                  * workaround.
3136                  */
3137                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3138                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3139                 if (chandef->chan->center_freq < chandef->center_freq1)
3140                         vht_oper->center_freq_seg0_idx -= 8;
3141                 else
3142                         vht_oper->center_freq_seg0_idx += 8;
3143                 break;
3144         case NL80211_CHAN_WIDTH_80P80:
3145                 /*
3146                  * Convert 80+80 MHz channel width to new style as interop
3147                  * workaround.
3148                  */
3149                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3150                 break;
3151         case NL80211_CHAN_WIDTH_80:
3152                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3153                 break;
3154         default:
3155                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3156                 break;
3157         }
3158
3159         /* don't require special VHT peer rates */
3160         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3161
3162         return pos + sizeof(struct ieee80211_vht_operation);
3163 }
3164
3165 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3166 {
3167         struct ieee80211_he_operation *he_oper;
3168         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3169         u32 he_oper_params;
3170         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3171
3172         if (chandef->chan->band == NL80211_BAND_6GHZ)
3173                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3174
3175         *pos++ = WLAN_EID_EXTENSION;
3176         *pos++ = ie_len;
3177         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3178
3179         he_oper_params = 0;
3180         he_oper_params |= u32_encode_bits(1023, /* disabled */
3181                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3182         he_oper_params |= u32_encode_bits(1,
3183                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3184         he_oper_params |= u32_encode_bits(1,
3185                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3186         if (chandef->chan->band == NL80211_BAND_6GHZ)
3187                 he_oper_params |= u32_encode_bits(1,
3188                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3189
3190         he_oper = (struct ieee80211_he_operation *)pos;
3191         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3192
3193         /* don't require special HE peer rates */
3194         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3195         pos += sizeof(struct ieee80211_he_operation);
3196
3197         if (chandef->chan->band != NL80211_BAND_6GHZ)
3198                 goto out;
3199
3200         /* TODO add VHT operational */
3201         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3202         he_6ghz_op->minrate = 6; /* 6 Mbps */
3203         he_6ghz_op->primary =
3204                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3205         he_6ghz_op->ccfs0 =
3206                 ieee80211_frequency_to_channel(chandef->center_freq1);
3207         if (chandef->center_freq2)
3208                 he_6ghz_op->ccfs1 =
3209                         ieee80211_frequency_to_channel(chandef->center_freq2);
3210         else
3211                 he_6ghz_op->ccfs1 = 0;
3212
3213         switch (chandef->width) {
3214         case NL80211_CHAN_WIDTH_160:
3215                 /* Convert 160 MHz channel width to new style as interop
3216                  * workaround.
3217                  */
3218                 he_6ghz_op->control =
3219                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3220                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3221                 if (chandef->chan->center_freq < chandef->center_freq1)
3222                         he_6ghz_op->ccfs0 -= 8;
3223                 else
3224                         he_6ghz_op->ccfs0 += 8;
3225                 fallthrough;
3226         case NL80211_CHAN_WIDTH_80P80:
3227                 he_6ghz_op->control =
3228                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3229                 break;
3230         case NL80211_CHAN_WIDTH_80:
3231                 he_6ghz_op->control =
3232                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3233                 break;
3234         case NL80211_CHAN_WIDTH_40:
3235                 he_6ghz_op->control =
3236                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3237                 break;
3238         default:
3239                 he_6ghz_op->control =
3240                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3241                 break;
3242         }
3243
3244         pos += sizeof(struct ieee80211_he_6ghz_oper);
3245
3246 out:
3247         return pos;
3248 }
3249
3250 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3251                                struct cfg80211_chan_def *chandef)
3252 {
3253         enum nl80211_channel_type channel_type;
3254
3255         if (!ht_oper)
3256                 return false;
3257
3258         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3259         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3260                 channel_type = NL80211_CHAN_HT20;
3261                 break;
3262         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3263                 channel_type = NL80211_CHAN_HT40PLUS;
3264                 break;
3265         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3266                 channel_type = NL80211_CHAN_HT40MINUS;
3267                 break;
3268         default:
3269                 channel_type = NL80211_CHAN_NO_HT;
3270                 return false;
3271         }
3272
3273         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3274         return true;
3275 }
3276
3277 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3278                                 const struct ieee80211_vht_operation *oper,
3279                                 const struct ieee80211_ht_operation *htop,
3280                                 struct cfg80211_chan_def *chandef)
3281 {
3282         struct cfg80211_chan_def new = *chandef;
3283         int cf0, cf1;
3284         int ccfs0, ccfs1, ccfs2;
3285         int ccf0, ccf1;
3286         u32 vht_cap;
3287         bool support_80_80 = false;
3288         bool support_160 = false;
3289         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3290                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3291         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3292                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3293
3294         if (!oper || !htop)
3295                 return false;
3296
3297         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3298         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3299                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3300         support_80_80 = ((vht_cap &
3301                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3302                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3303                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3304                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3305                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3306         ccfs0 = oper->center_freq_seg0_idx;
3307         ccfs1 = oper->center_freq_seg1_idx;
3308         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3309                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3310                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3311
3312         ccf0 = ccfs0;
3313
3314         /* if not supported, parse as though we didn't understand it */
3315         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3316                 ext_nss_bw_supp = 0;
3317
3318         /*
3319          * Cf. IEEE 802.11 Table 9-250
3320          *
3321          * We really just consider that because it's inefficient to connect
3322          * at a higher bandwidth than we'll actually be able to use.
3323          */
3324         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3325         default:
3326         case 0x00:
3327                 ccf1 = 0;
3328                 support_160 = false;
3329                 support_80_80 = false;
3330                 break;
3331         case 0x01:
3332                 support_80_80 = false;
3333                 fallthrough;
3334         case 0x02:
3335         case 0x03:
3336                 ccf1 = ccfs2;
3337                 break;
3338         case 0x10:
3339                 ccf1 = ccfs1;
3340                 break;
3341         case 0x11:
3342         case 0x12:
3343                 if (!ccfs1)
3344                         ccf1 = ccfs2;
3345                 else
3346                         ccf1 = ccfs1;
3347                 break;
3348         case 0x13:
3349         case 0x20:
3350         case 0x23:
3351                 ccf1 = ccfs1;
3352                 break;
3353         }
3354
3355         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3356         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3357
3358         switch (oper->chan_width) {
3359         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3360                 /* just use HT information directly */
3361                 break;
3362         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3363                 new.width = NL80211_CHAN_WIDTH_80;
3364                 new.center_freq1 = cf0;
3365                 /* If needed, adjust based on the newer interop workaround. */
3366                 if (ccf1) {
3367                         unsigned int diff;
3368
3369                         diff = abs(ccf1 - ccf0);
3370                         if ((diff == 8) && support_160) {
3371                                 new.width = NL80211_CHAN_WIDTH_160;
3372                                 new.center_freq1 = cf1;
3373                         } else if ((diff > 8) && support_80_80) {
3374                                 new.width = NL80211_CHAN_WIDTH_80P80;
3375                                 new.center_freq2 = cf1;
3376                         }
3377                 }
3378                 break;
3379         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3380                 /* deprecated encoding */
3381                 new.width = NL80211_CHAN_WIDTH_160;
3382                 new.center_freq1 = cf0;
3383                 break;
3384         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3385                 /* deprecated encoding */
3386                 new.width = NL80211_CHAN_WIDTH_80P80;
3387                 new.center_freq1 = cf0;
3388                 new.center_freq2 = cf1;
3389                 break;
3390         default:
3391                 return false;
3392         }
3393
3394         if (!cfg80211_chandef_valid(&new))
3395                 return false;
3396
3397         *chandef = new;
3398         return true;
3399 }
3400
3401 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3402                                     const struct ieee80211_he_operation *he_oper,
3403                                     struct cfg80211_chan_def *chandef)
3404 {
3405         struct ieee80211_local *local = sdata->local;
3406         struct ieee80211_supported_band *sband;
3407         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3408         const struct ieee80211_sta_he_cap *he_cap;
3409         struct cfg80211_chan_def he_chandef = *chandef;
3410         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3411         bool support_80_80, support_160;
3412         u8 he_phy_cap;
3413         u32 freq;
3414
3415         if (chandef->chan->band != NL80211_BAND_6GHZ)
3416                 return true;
3417
3418         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3419
3420         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3421         if (!he_cap) {
3422                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3423                 return false;
3424         }
3425
3426         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3427         support_160 =
3428                 he_phy_cap &
3429                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3430         support_80_80 =
3431                 he_phy_cap &
3432                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3433
3434         if (!he_oper) {
3435                 sdata_info(sdata,
3436                            "HE is not advertised on (on %d MHz), expect issues\n",
3437                            chandef->chan->center_freq);
3438                 return false;
3439         }
3440
3441         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3442
3443         if (!he_6ghz_oper) {
3444                 sdata_info(sdata,
3445                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3446                            chandef->chan->center_freq);
3447                 return false;
3448         }
3449
3450         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3451                                               NL80211_BAND_6GHZ);
3452         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3453
3454         switch (u8_get_bits(he_6ghz_oper->control,
3455                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3456         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3457                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3458                 break;
3459         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3460                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3461                 break;
3462         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3463                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3464                 break;
3465         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3466                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3467                 if (!he_6ghz_oper->ccfs1)
3468                         break;
3469                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3470                         if (support_160)
3471                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3472                 } else {
3473                         if (support_80_80)
3474                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3475                 }
3476                 break;
3477         }
3478
3479         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3480                 he_chandef.center_freq1 =
3481                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3482                                                        NL80211_BAND_6GHZ);
3483         } else {
3484                 he_chandef.center_freq1 =
3485                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3486                                                        NL80211_BAND_6GHZ);
3487                 if (support_80_80 || support_160)
3488                         he_chandef.center_freq2 =
3489                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3490                                                                NL80211_BAND_6GHZ);
3491         }
3492
3493         if (!cfg80211_chandef_valid(&he_chandef)) {
3494                 sdata_info(sdata,
3495                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3496                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3497                            he_chandef.width,
3498                            he_chandef.center_freq1,
3499                            he_chandef.center_freq2);
3500                 return false;
3501         }
3502
3503         *chandef = he_chandef;
3504
3505         return true;
3506 }
3507
3508 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3509                                 struct cfg80211_chan_def *chandef)
3510 {
3511         u32 oper_freq;
3512
3513         if (!oper)
3514                 return false;
3515
3516         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3517         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3518                 chandef->width = NL80211_CHAN_WIDTH_1;
3519                 break;
3520         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3521                 chandef->width = NL80211_CHAN_WIDTH_2;
3522                 break;
3523         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3524                 chandef->width = NL80211_CHAN_WIDTH_4;
3525                 break;
3526         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3527                 chandef->width = NL80211_CHAN_WIDTH_8;
3528                 break;
3529         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3530                 chandef->width = NL80211_CHAN_WIDTH_16;
3531                 break;
3532         default:
3533                 return false;
3534         }
3535
3536         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3537                                                   NL80211_BAND_S1GHZ);
3538         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3539         chandef->freq1_offset = oper_freq % 1000;
3540
3541         return true;
3542 }
3543
3544 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3545                              const struct ieee80211_supported_band *sband,
3546                              const u8 *srates, int srates_len, u32 *rates)
3547 {
3548         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3549         int shift = ieee80211_chandef_get_shift(chandef);
3550         struct ieee80211_rate *br;
3551         int brate, rate, i, j, count = 0;
3552
3553         *rates = 0;
3554
3555         for (i = 0; i < srates_len; i++) {
3556                 rate = srates[i] & 0x7f;
3557
3558                 for (j = 0; j < sband->n_bitrates; j++) {
3559                         br = &sband->bitrates[j];
3560                         if ((rate_flags & br->flags) != rate_flags)
3561                                 continue;
3562
3563                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3564                         if (brate == rate) {
3565                                 *rates |= BIT(j);
3566                                 count++;
3567                                 break;
3568                         }
3569                 }
3570         }
3571         return count;
3572 }
3573
3574 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3575                             struct sk_buff *skb, bool need_basic,
3576                             enum nl80211_band band)
3577 {
3578         struct ieee80211_local *local = sdata->local;
3579         struct ieee80211_supported_band *sband;
3580         int rate, shift;
3581         u8 i, rates, *pos;
3582         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3583         u32 rate_flags;
3584
3585         shift = ieee80211_vif_get_shift(&sdata->vif);
3586         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3587         sband = local->hw.wiphy->bands[band];
3588         rates = 0;
3589         for (i = 0; i < sband->n_bitrates; i++) {
3590                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3591                         continue;
3592                 rates++;
3593         }
3594         if (rates > 8)
3595                 rates = 8;
3596
3597         if (skb_tailroom(skb) < rates + 2)
3598                 return -ENOMEM;
3599
3600         pos = skb_put(skb, rates + 2);
3601         *pos++ = WLAN_EID_SUPP_RATES;
3602         *pos++ = rates;
3603         for (i = 0; i < rates; i++) {
3604                 u8 basic = 0;
3605                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3606                         continue;
3607
3608                 if (need_basic && basic_rates & BIT(i))
3609                         basic = 0x80;
3610                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3611                                     5 * (1 << shift));
3612                 *pos++ = basic | (u8) rate;
3613         }
3614
3615         return 0;
3616 }
3617
3618 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3619                                 struct sk_buff *skb, bool need_basic,
3620                                 enum nl80211_band band)
3621 {
3622         struct ieee80211_local *local = sdata->local;
3623         struct ieee80211_supported_band *sband;
3624         int rate, shift;
3625         u8 i, exrates, *pos;
3626         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3627         u32 rate_flags;
3628
3629         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3630         shift = ieee80211_vif_get_shift(&sdata->vif);
3631
3632         sband = local->hw.wiphy->bands[band];
3633         exrates = 0;
3634         for (i = 0; i < sband->n_bitrates; i++) {
3635                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3636                         continue;
3637                 exrates++;
3638         }
3639
3640         if (exrates > 8)
3641                 exrates -= 8;
3642         else
3643                 exrates = 0;
3644
3645         if (skb_tailroom(skb) < exrates + 2)
3646                 return -ENOMEM;
3647
3648         if (exrates) {
3649                 pos = skb_put(skb, exrates + 2);
3650                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3651                 *pos++ = exrates;
3652                 for (i = 8; i < sband->n_bitrates; i++) {
3653                         u8 basic = 0;
3654                         if ((rate_flags & sband->bitrates[i].flags)
3655                             != rate_flags)
3656                                 continue;
3657                         if (need_basic && basic_rates & BIT(i))
3658                                 basic = 0x80;
3659                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3660                                             5 * (1 << shift));
3661                         *pos++ = basic | (u8) rate;
3662                 }
3663         }
3664         return 0;
3665 }
3666
3667 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3668 {
3669         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3670         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3671
3672         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3673                 /* non-managed type inferfaces */
3674                 return 0;
3675         }
3676         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3677 }
3678 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3679
3680 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3681 {
3682         if (!mcs)
3683                 return 1;
3684
3685         /* TODO: consider rx_highest */
3686
3687         if (mcs->rx_mask[3])
3688                 return 4;
3689         if (mcs->rx_mask[2])
3690                 return 3;
3691         if (mcs->rx_mask[1])
3692                 return 2;
3693         return 1;
3694 }
3695
3696 /**
3697  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3698  * @local: mac80211 hw info struct
3699  * @status: RX status
3700  * @mpdu_len: total MPDU length (including FCS)
3701  * @mpdu_offset: offset into MPDU to calculate timestamp at
3702  *
3703  * This function calculates the RX timestamp at the given MPDU offset, taking
3704  * into account what the RX timestamp was. An offset of 0 will just normalize
3705  * the timestamp to TSF at beginning of MPDU reception.
3706  */
3707 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3708                                      struct ieee80211_rx_status *status,
3709                                      unsigned int mpdu_len,
3710                                      unsigned int mpdu_offset)
3711 {
3712         u64 ts = status->mactime;
3713         struct rate_info ri;
3714         u16 rate;
3715         u8 n_ltf;
3716
3717         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3718                 return 0;
3719
3720         memset(&ri, 0, sizeof(ri));
3721
3722         ri.bw = status->bw;
3723
3724         /* Fill cfg80211 rate info */
3725         switch (status->encoding) {
3726         case RX_ENC_HE:
3727                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3728                 ri.mcs = status->rate_idx;
3729                 ri.nss = status->nss;
3730                 ri.he_ru_alloc = status->he_ru;
3731                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3732                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3733
3734                 /*
3735                  * See P802.11ax_D6.0, section 27.3.4 for
3736                  * VHT PPDU format.
3737                  */
3738                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3739                         mpdu_offset += 2;
3740                         ts += 36;
3741
3742                         /*
3743                          * TODO:
3744                          * For HE MU PPDU, add the HE-SIG-B.
3745                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3746                          * For HE TB PPDU, add 4us for the HE-STF.
3747                          * Add the HE-LTF durations - variable.
3748                          */
3749                 }
3750
3751                 break;
3752         case RX_ENC_HT:
3753                 ri.mcs = status->rate_idx;
3754                 ri.flags |= RATE_INFO_FLAGS_MCS;
3755                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3756                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3757
3758                 /*
3759                  * See P802.11REVmd_D3.0, section 19.3.2 for
3760                  * HT PPDU format.
3761                  */
3762                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3763                         mpdu_offset += 2;
3764                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3765                                 ts += 24;
3766                         else
3767                                 ts += 32;
3768
3769                         /*
3770                          * Add Data HT-LTFs per streams
3771                          * TODO: add Extension HT-LTFs, 4us per LTF
3772                          */
3773                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3774                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3775                         ts += n_ltf * 4;
3776                 }
3777
3778                 break;
3779         case RX_ENC_VHT:
3780                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3781                 ri.mcs = status->rate_idx;
3782                 ri.nss = status->nss;
3783                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3784                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3785
3786                 /*
3787                  * See P802.11REVmd_D3.0, section 21.3.2 for
3788                  * VHT PPDU format.
3789                  */
3790                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3791                         mpdu_offset += 2;
3792                         ts += 36;
3793
3794                         /*
3795                          * Add VHT-LTFs per streams
3796                          */
3797                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3798                                 ri.nss + 1 : ri.nss;
3799                         ts += 4 * n_ltf;
3800                 }
3801
3802                 break;
3803         default:
3804                 WARN_ON(1);
3805                 fallthrough;
3806         case RX_ENC_LEGACY: {
3807                 struct ieee80211_supported_band *sband;
3808                 int shift = 0;
3809                 int bitrate;
3810
3811                 switch (status->bw) {
3812                 case RATE_INFO_BW_10:
3813                         shift = 1;
3814                         break;
3815                 case RATE_INFO_BW_5:
3816                         shift = 2;
3817                         break;
3818                 }
3819
3820                 sband = local->hw.wiphy->bands[status->band];
3821                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3822                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3823
3824                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3825                         if (status->band == NL80211_BAND_5GHZ) {
3826                                 ts += 20 << shift;
3827                                 mpdu_offset += 2;
3828                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3829                                 ts += 96;
3830                         } else {
3831                                 ts += 192;
3832                         }
3833                 }
3834                 break;
3835                 }
3836         }
3837
3838         rate = cfg80211_calculate_bitrate(&ri);
3839         if (WARN_ONCE(!rate,
3840                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3841                       (unsigned long long)status->flag, status->rate_idx,
3842                       status->nss))
3843                 return 0;
3844
3845         /* rewind from end of MPDU */
3846         if (status->flag & RX_FLAG_MACTIME_END)
3847                 ts -= mpdu_len * 8 * 10 / rate;
3848
3849         ts += mpdu_offset * 8 * 10 / rate;
3850
3851         return ts;
3852 }
3853
3854 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3855 {
3856         struct ieee80211_sub_if_data *sdata;
3857         struct cfg80211_chan_def chandef;
3858
3859         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3860         lockdep_assert_wiphy(local->hw.wiphy);
3861
3862         mutex_lock(&local->mtx);
3863         list_for_each_entry(sdata, &local->interfaces, list) {
3864                 /* it might be waiting for the local->mtx, but then
3865                  * by the time it gets it, sdata->wdev.cac_started
3866                  * will no longer be true
3867                  */
3868                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3869
3870                 if (sdata->wdev.cac_started) {
3871                         chandef = sdata->vif.bss_conf.chandef;
3872                         ieee80211_vif_release_channel(sdata);
3873                         cfg80211_cac_event(sdata->dev,
3874                                            &chandef,
3875                                            NL80211_RADAR_CAC_ABORTED,
3876                                            GFP_KERNEL);
3877                 }
3878         }
3879         mutex_unlock(&local->mtx);
3880 }
3881
3882 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3883 {
3884         struct ieee80211_local *local =
3885                 container_of(work, struct ieee80211_local, radar_detected_work);
3886         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3887         struct ieee80211_chanctx *ctx;
3888         int num_chanctx = 0;
3889
3890         mutex_lock(&local->chanctx_mtx);
3891         list_for_each_entry(ctx, &local->chanctx_list, list) {
3892                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3893                         continue;
3894
3895                 num_chanctx++;
3896                 chandef = ctx->conf.def;
3897         }
3898         mutex_unlock(&local->chanctx_mtx);
3899
3900         wiphy_lock(local->hw.wiphy);
3901         ieee80211_dfs_cac_cancel(local);
3902         wiphy_unlock(local->hw.wiphy);
3903
3904         if (num_chanctx > 1)
3905                 /* XXX: multi-channel is not supported yet */
3906                 WARN_ON(1);
3907         else
3908                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3909 }
3910
3911 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3912 {
3913         struct ieee80211_local *local = hw_to_local(hw);
3914
3915         trace_api_radar_detected(local);
3916
3917         schedule_work(&local->radar_detected_work);
3918 }
3919 EXPORT_SYMBOL(ieee80211_radar_detected);
3920
3921 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3922 {
3923         u32 ret;
3924         int tmp;
3925
3926         switch (c->width) {
3927         case NL80211_CHAN_WIDTH_20:
3928                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3929                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3930                 break;
3931         case NL80211_CHAN_WIDTH_40:
3932                 c->width = NL80211_CHAN_WIDTH_20;
3933                 c->center_freq1 = c->chan->center_freq;
3934                 ret = IEEE80211_STA_DISABLE_40MHZ |
3935                       IEEE80211_STA_DISABLE_VHT;
3936                 break;
3937         case NL80211_CHAN_WIDTH_80:
3938                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3939                 /* n_P40 */
3940                 tmp /= 2;
3941                 /* freq_P40 */
3942                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3943                 c->width = NL80211_CHAN_WIDTH_40;
3944                 ret = IEEE80211_STA_DISABLE_VHT;
3945                 break;
3946         case NL80211_CHAN_WIDTH_80P80:
3947                 c->center_freq2 = 0;
3948                 c->width = NL80211_CHAN_WIDTH_80;
3949                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3950                       IEEE80211_STA_DISABLE_160MHZ;
3951                 break;
3952         case NL80211_CHAN_WIDTH_160:
3953                 /* n_P20 */
3954                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3955                 /* n_P80 */
3956                 tmp /= 4;
3957                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3958                 c->width = NL80211_CHAN_WIDTH_80;
3959                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3960                       IEEE80211_STA_DISABLE_160MHZ;
3961                 break;
3962         default:
3963         case NL80211_CHAN_WIDTH_20_NOHT:
3964                 WARN_ON_ONCE(1);
3965                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3966                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3967                 break;
3968         case NL80211_CHAN_WIDTH_1:
3969         case NL80211_CHAN_WIDTH_2:
3970         case NL80211_CHAN_WIDTH_4:
3971         case NL80211_CHAN_WIDTH_8:
3972         case NL80211_CHAN_WIDTH_16:
3973         case NL80211_CHAN_WIDTH_5:
3974         case NL80211_CHAN_WIDTH_10:
3975                 WARN_ON_ONCE(1);
3976                 /* keep c->width */
3977                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3978                 break;
3979         }
3980
3981         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3982
3983         return ret;
3984 }
3985
3986 /*
3987  * Returns true if smps_mode_new is strictly more restrictive than
3988  * smps_mode_old.
3989  */
3990 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3991                                    enum ieee80211_smps_mode smps_mode_new)
3992 {
3993         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3994                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3995                 return false;
3996
3997         switch (smps_mode_old) {
3998         case IEEE80211_SMPS_STATIC:
3999                 return false;
4000         case IEEE80211_SMPS_DYNAMIC:
4001                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4002         case IEEE80211_SMPS_OFF:
4003                 return smps_mode_new != IEEE80211_SMPS_OFF;
4004         default:
4005                 WARN_ON(1);
4006         }
4007
4008         return false;
4009 }
4010
4011 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4012                               struct cfg80211_csa_settings *csa_settings)
4013 {
4014         struct sk_buff *skb;
4015         struct ieee80211_mgmt *mgmt;
4016         struct ieee80211_local *local = sdata->local;
4017         int freq;
4018         int hdr_len = offsetofend(struct ieee80211_mgmt,
4019                                   u.action.u.chan_switch);
4020         u8 *pos;
4021
4022         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4023             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4024                 return -EOPNOTSUPP;
4025
4026         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4027                             5 + /* channel switch announcement element */
4028                             3 + /* secondary channel offset element */
4029                             5 + /* wide bandwidth channel switch announcement */
4030                             8); /* mesh channel switch parameters element */
4031         if (!skb)
4032                 return -ENOMEM;
4033
4034         skb_reserve(skb, local->tx_headroom);
4035         mgmt = skb_put_zero(skb, hdr_len);
4036         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4037                                           IEEE80211_STYPE_ACTION);
4038
4039         eth_broadcast_addr(mgmt->da);
4040         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4041         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4042                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4043         } else {
4044                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4045                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4046         }
4047         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4048         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4049         pos = skb_put(skb, 5);
4050         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4051         *pos++ = 3;                                             /* IE length */
4052         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4053         freq = csa_settings->chandef.chan->center_freq;
4054         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4055         *pos++ = csa_settings->count;                           /* count */
4056
4057         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4058                 enum nl80211_channel_type ch_type;
4059
4060                 skb_put(skb, 3);
4061                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4062                 *pos++ = 1;                                     /* IE length */
4063                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4064                 if (ch_type == NL80211_CHAN_HT40PLUS)
4065                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4066                 else
4067                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4068         }
4069
4070         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4071                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4072
4073                 skb_put(skb, 8);
4074                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4075                 *pos++ = 6;                                     /* IE length */
4076                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4077                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4078                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4079                 *pos++ |= csa_settings->block_tx ?
4080                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4081                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4082                 pos += 2;
4083                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4084                 pos += 2;
4085         }
4086
4087         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4088             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4089             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4090                 skb_put(skb, 5);
4091                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4092         }
4093
4094         ieee80211_tx_skb(sdata, skb);
4095         return 0;
4096 }
4097
4098 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4099 {
4100         return !(cs == NULL || cs->cipher == 0 ||
4101                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4102                  cs->hdr_len <= cs->key_idx_off ||
4103                  cs->key_idx_shift > 7 ||
4104                  cs->key_idx_mask == 0);
4105 }
4106
4107 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4108 {
4109         int i;
4110
4111         /* Ensure we have enough iftype bitmap space for all iftype values */
4112         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4113
4114         for (i = 0; i < n; i++)
4115                 if (!ieee80211_cs_valid(&cs[i]))
4116                         return false;
4117
4118         return true;
4119 }
4120
4121 const struct ieee80211_cipher_scheme *
4122 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4123                  enum nl80211_iftype iftype)
4124 {
4125         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4126         int n = local->hw.n_cipher_schemes;
4127         int i;
4128         const struct ieee80211_cipher_scheme *cs = NULL;
4129
4130         for (i = 0; i < n; i++) {
4131                 if (l[i].cipher == cipher) {
4132                         cs = &l[i];
4133                         break;
4134                 }
4135         }
4136
4137         if (!cs || !(cs->iftype & BIT(iftype)))
4138                 return NULL;
4139
4140         return cs;
4141 }
4142
4143 int ieee80211_cs_headroom(struct ieee80211_local *local,
4144                           struct cfg80211_crypto_settings *crypto,
4145                           enum nl80211_iftype iftype)
4146 {
4147         const struct ieee80211_cipher_scheme *cs;
4148         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4149         int i;
4150
4151         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4152                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4153                                       iftype);
4154
4155                 if (cs && headroom < cs->hdr_len)
4156                         headroom = cs->hdr_len;
4157         }
4158
4159         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4160         if (cs && headroom < cs->hdr_len)
4161                 headroom = cs->hdr_len;
4162
4163         return headroom;
4164 }
4165
4166 static bool
4167 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4168 {
4169         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4170         int skip;
4171
4172         if (end > 0)
4173                 return false;
4174
4175         /* One shot NOA  */
4176         if (data->count[i] == 1)
4177                 return false;
4178
4179         if (data->desc[i].interval == 0)
4180                 return false;
4181
4182         /* End time is in the past, check for repetitions */
4183         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4184         if (data->count[i] < 255) {
4185                 if (data->count[i] <= skip) {
4186                         data->count[i] = 0;
4187                         return false;
4188                 }
4189
4190                 data->count[i] -= skip;
4191         }
4192
4193         data->desc[i].start += skip * data->desc[i].interval;
4194
4195         return true;
4196 }
4197
4198 static bool
4199 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4200                              s32 *offset)
4201 {
4202         bool ret = false;
4203         int i;
4204
4205         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4206                 s32 cur;
4207
4208                 if (!data->count[i])
4209                         continue;
4210
4211                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4212                         ret = true;
4213
4214                 cur = data->desc[i].start - tsf;
4215                 if (cur > *offset)
4216                         continue;
4217
4218                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4219                 if (cur > *offset)
4220                         *offset = cur;
4221         }
4222
4223         return ret;
4224 }
4225
4226 static u32
4227 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4228 {
4229         s32 offset = 0;
4230         int tries = 0;
4231         /*
4232          * arbitrary limit, used to avoid infinite loops when combined NoA
4233          * descriptors cover the full time period.
4234          */
4235         int max_tries = 5;
4236
4237         ieee80211_extend_absent_time(data, tsf, &offset);
4238         do {
4239                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4240                         break;
4241
4242                 tries++;
4243         } while (tries < max_tries);
4244
4245         return offset;
4246 }
4247
4248 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4249 {
4250         u32 next_offset = BIT(31) - 1;
4251         int i;
4252
4253         data->absent = 0;
4254         data->has_next_tsf = false;
4255         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4256                 s32 start;
4257
4258                 if (!data->count[i])
4259                         continue;
4260
4261                 ieee80211_extend_noa_desc(data, tsf, i);
4262                 start = data->desc[i].start - tsf;
4263                 if (start <= 0)
4264                         data->absent |= BIT(i);
4265
4266                 if (next_offset > start)
4267                         next_offset = start;
4268
4269                 data->has_next_tsf = true;
4270         }
4271
4272         if (data->absent)
4273                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4274
4275         data->next_tsf = tsf + next_offset;
4276 }
4277 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4278
4279 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4280                             struct ieee80211_noa_data *data, u32 tsf)
4281 {
4282         int ret = 0;
4283         int i;
4284
4285         memset(data, 0, sizeof(*data));
4286
4287         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4288                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4289
4290                 if (!desc->count || !desc->duration)
4291                         continue;
4292
4293                 data->count[i] = desc->count;
4294                 data->desc[i].start = le32_to_cpu(desc->start_time);
4295                 data->desc[i].duration = le32_to_cpu(desc->duration);
4296                 data->desc[i].interval = le32_to_cpu(desc->interval);
4297
4298                 if (data->count[i] > 1 &&
4299                     data->desc[i].interval < data->desc[i].duration)
4300                         continue;
4301
4302                 ieee80211_extend_noa_desc(data, tsf, i);
4303                 ret++;
4304         }
4305
4306         if (ret)
4307                 ieee80211_update_p2p_noa(data, tsf);
4308
4309         return ret;
4310 }
4311 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4312
4313 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4314                            struct ieee80211_sub_if_data *sdata)
4315 {
4316         u64 tsf = drv_get_tsf(local, sdata);
4317         u64 dtim_count = 0;
4318         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4319         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4320         struct ps_data *ps;
4321         u8 bcns_from_dtim;
4322
4323         if (tsf == -1ULL || !beacon_int || !dtim_period)
4324                 return;
4325
4326         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4327             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4328                 if (!sdata->bss)
4329                         return;
4330
4331                 ps = &sdata->bss->ps;
4332         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4333                 ps = &sdata->u.mesh.ps;
4334         } else {
4335                 return;
4336         }
4337
4338         /*
4339          * actually finds last dtim_count, mac80211 will update in
4340          * __beacon_add_tim().
4341          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4342          */
4343         do_div(tsf, beacon_int);
4344         bcns_from_dtim = do_div(tsf, dtim_period);
4345         /* just had a DTIM */
4346         if (!bcns_from_dtim)
4347                 dtim_count = 0;
4348         else
4349                 dtim_count = dtim_period - bcns_from_dtim;
4350
4351         ps->dtim_count = dtim_count;
4352 }
4353
4354 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4355                                          struct ieee80211_chanctx *ctx)
4356 {
4357         struct ieee80211_sub_if_data *sdata;
4358         u8 radar_detect = 0;
4359
4360         lockdep_assert_held(&local->chanctx_mtx);
4361
4362         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4363                 return 0;
4364
4365         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4366                 if (sdata->reserved_radar_required)
4367                         radar_detect |= BIT(sdata->reserved_chandef.width);
4368
4369         /*
4370          * An in-place reservation context should not have any assigned vifs
4371          * until it replaces the other context.
4372          */
4373         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4374                 !list_empty(&ctx->assigned_vifs));
4375
4376         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4377                 if (sdata->radar_required)
4378                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4379
4380         return radar_detect;
4381 }
4382
4383 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4384                                  const struct cfg80211_chan_def *chandef,
4385                                  enum ieee80211_chanctx_mode chanmode,
4386                                  u8 radar_detect)
4387 {
4388         struct ieee80211_local *local = sdata->local;
4389         struct ieee80211_sub_if_data *sdata_iter;
4390         enum nl80211_iftype iftype = sdata->wdev.iftype;
4391         struct ieee80211_chanctx *ctx;
4392         int total = 1;
4393         struct iface_combination_params params = {
4394                 .radar_detect = radar_detect,
4395         };
4396
4397         lockdep_assert_held(&local->chanctx_mtx);
4398
4399         if (WARN_ON(hweight32(radar_detect) > 1))
4400                 return -EINVAL;
4401
4402         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4403                     !chandef->chan))
4404                 return -EINVAL;
4405
4406         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4407                 return -EINVAL;
4408
4409         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4410             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4411                 /*
4412                  * always passing this is harmless, since it'll be the
4413                  * same value that cfg80211 finds if it finds the same
4414                  * interface ... and that's always allowed
4415                  */
4416                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4417         }
4418
4419         /* Always allow software iftypes */
4420         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4421                 if (radar_detect)
4422                         return -EINVAL;
4423                 return 0;
4424         }
4425
4426         if (chandef)
4427                 params.num_different_channels = 1;
4428
4429         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4430                 params.iftype_num[iftype] = 1;
4431
4432         list_for_each_entry(ctx, &local->chanctx_list, list) {
4433                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4434                         continue;
4435                 params.radar_detect |=
4436                         ieee80211_chanctx_radar_detect(local, ctx);
4437                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4438                         params.num_different_channels++;
4439                         continue;
4440                 }
4441                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4442                     cfg80211_chandef_compatible(chandef,
4443                                                 &ctx->conf.def))
4444                         continue;
4445                 params.num_different_channels++;
4446         }
4447
4448         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4449                 struct wireless_dev *wdev_iter;
4450
4451                 wdev_iter = &sdata_iter->wdev;
4452
4453                 if (sdata_iter == sdata ||
4454                     !ieee80211_sdata_running(sdata_iter) ||
4455                     cfg80211_iftype_allowed(local->hw.wiphy,
4456                                             wdev_iter->iftype, 0, 1))
4457                         continue;
4458
4459                 params.iftype_num[wdev_iter->iftype]++;
4460                 total++;
4461         }
4462
4463         if (total == 1 && !params.radar_detect)
4464                 return 0;
4465
4466         return cfg80211_check_combinations(local->hw.wiphy, &params);
4467 }
4468
4469 static void
4470 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4471                          void *data)
4472 {
4473         u32 *max_num_different_channels = data;
4474
4475         *max_num_different_channels = max(*max_num_different_channels,
4476                                           c->num_different_channels);
4477 }
4478
4479 int ieee80211_max_num_channels(struct ieee80211_local *local)
4480 {
4481         struct ieee80211_sub_if_data *sdata;
4482         struct ieee80211_chanctx *ctx;
4483         u32 max_num_different_channels = 1;
4484         int err;
4485         struct iface_combination_params params = {0};
4486
4487         lockdep_assert_held(&local->chanctx_mtx);
4488
4489         list_for_each_entry(ctx, &local->chanctx_list, list) {
4490                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4491                         continue;
4492
4493                 params.num_different_channels++;
4494
4495                 params.radar_detect |=
4496                         ieee80211_chanctx_radar_detect(local, ctx);
4497         }
4498
4499         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4500                 params.iftype_num[sdata->wdev.iftype]++;
4501
4502         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4503                                          ieee80211_iter_max_chans,
4504                                          &max_num_different_channels);
4505         if (err < 0)
4506                 return err;
4507
4508         return max_num_different_channels;
4509 }
4510
4511 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4512                                 struct ieee80211_sta_s1g_cap *caps,
4513                                 struct sk_buff *skb)
4514 {
4515         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4516         struct ieee80211_s1g_cap s1g_capab;
4517         u8 *pos;
4518         int i;
4519
4520         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4521                 return;
4522
4523         if (!caps->s1g)
4524                 return;
4525
4526         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4527         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4528
4529         /* override the capability info */
4530         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4531                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4532
4533                 s1g_capab.capab_info[i] &= ~mask;
4534                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4535         }
4536
4537         /* then MCS and NSS set */
4538         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4539                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4540
4541                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4542                 s1g_capab.supp_mcs_nss[i] |=
4543                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4544         }
4545
4546         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4547         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4548         *pos++ = sizeof(s1g_capab);
4549
4550         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4551 }
4552
4553 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4554                                   struct sk_buff *skb)
4555 {
4556         u8 *pos = skb_put(skb, 3);
4557
4558         *pos++ = WLAN_EID_AID_REQUEST;
4559         *pos++ = 1;
4560         *pos++ = 0;
4561 }
4562
4563 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4564 {
4565         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4566         *buf++ = 7; /* len */
4567         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4568         *buf++ = 0x50;
4569         *buf++ = 0xf2;
4570         *buf++ = 2; /* WME */
4571         *buf++ = 0; /* WME info */
4572         *buf++ = 1; /* WME ver */
4573         *buf++ = qosinfo; /* U-APSD no in use */
4574
4575         return buf;
4576 }
4577
4578 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4579                              unsigned long *frame_cnt,
4580                              unsigned long *byte_cnt)
4581 {
4582         struct txq_info *txqi = to_txq_info(txq);
4583         u32 frag_cnt = 0, frag_bytes = 0;
4584         struct sk_buff *skb;
4585
4586         skb_queue_walk(&txqi->frags, skb) {
4587                 frag_cnt++;
4588                 frag_bytes += skb->len;
4589         }
4590
4591         if (frame_cnt)
4592                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4593
4594         if (byte_cnt)
4595                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4596 }
4597 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4598
4599 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4600         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4601         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4602         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4603         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4604 };
4605
4606 u16 ieee80211_encode_usf(int listen_interval)
4607 {
4608         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4609         u16 ui, usf = 0;
4610
4611         /* find greatest USF */
4612         while (usf < IEEE80211_MAX_USF) {
4613                 if (listen_interval % listen_int_usf[usf + 1])
4614                         break;
4615                 usf += 1;
4616         }
4617         ui = listen_interval / listen_int_usf[usf];
4618
4619         /* error if there is a remainder. Should've been checked by user */
4620         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4621         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4622                           FIELD_PREP(LISTEN_INT_UI, ui);
4623
4624         return (u16) listen_interval;
4625 }