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_VENDOR_SPECIFIC:
1121                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1122                             pos[2] == 0xf2) {
1123                                 /* Microsoft OUI (00:50:F2) */
1124
1125                                 if (calc_crc)
1126                                         crc = crc32_be(crc, pos - 2, elen + 2);
1127
1128                                 if (elen >= 5 && pos[3] == 2) {
1129                                         /* OUI Type 2 - WMM IE */
1130                                         if (pos[4] == 0) {
1131                                                 elems->wmm_info = pos;
1132                                                 elems->wmm_info_len = elen;
1133                                         } else if (pos[4] == 1) {
1134                                                 elems->wmm_param = pos;
1135                                                 elems->wmm_param_len = elen;
1136                                         }
1137                                 }
1138                         }
1139                         break;
1140                 case WLAN_EID_RSN:
1141                         elems->rsn = pos;
1142                         elems->rsn_len = elen;
1143                         break;
1144                 case WLAN_EID_ERP_INFO:
1145                         if (elen >= 1)
1146                                 elems->erp_info = pos;
1147                         else
1148                                 elem_parse_failed = true;
1149                         break;
1150                 case WLAN_EID_EXT_SUPP_RATES:
1151                         elems->ext_supp_rates = pos;
1152                         elems->ext_supp_rates_len = elen;
1153                         break;
1154                 case WLAN_EID_HT_CAPABILITY:
1155                         if (elen >= sizeof(struct ieee80211_ht_cap))
1156                                 elems->ht_cap_elem = (void *)pos;
1157                         else
1158                                 elem_parse_failed = true;
1159                         break;
1160                 case WLAN_EID_HT_OPERATION:
1161                         if (elen >= sizeof(struct ieee80211_ht_operation))
1162                                 elems->ht_operation = (void *)pos;
1163                         else
1164                                 elem_parse_failed = true;
1165                         break;
1166                 case WLAN_EID_VHT_CAPABILITY:
1167                         if (elen >= sizeof(struct ieee80211_vht_cap))
1168                                 elems->vht_cap_elem = (void *)pos;
1169                         else
1170                                 elem_parse_failed = true;
1171                         break;
1172                 case WLAN_EID_VHT_OPERATION:
1173                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1174                                 elems->vht_operation = (void *)pos;
1175                                 if (calc_crc)
1176                                         crc = crc32_be(crc, pos - 2, elen + 2);
1177                                 break;
1178                         }
1179                         elem_parse_failed = true;
1180                         break;
1181                 case WLAN_EID_OPMODE_NOTIF:
1182                         if (elen > 0) {
1183                                 elems->opmode_notif = pos;
1184                                 if (calc_crc)
1185                                         crc = crc32_be(crc, pos - 2, elen + 2);
1186                                 break;
1187                         }
1188                         elem_parse_failed = true;
1189                         break;
1190                 case WLAN_EID_MESH_ID:
1191                         elems->mesh_id = pos;
1192                         elems->mesh_id_len = elen;
1193                         break;
1194                 case WLAN_EID_MESH_CONFIG:
1195                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1196                                 elems->mesh_config = (void *)pos;
1197                         else
1198                                 elem_parse_failed = true;
1199                         break;
1200                 case WLAN_EID_PEER_MGMT:
1201                         elems->peering = pos;
1202                         elems->peering_len = elen;
1203                         break;
1204                 case WLAN_EID_MESH_AWAKE_WINDOW:
1205                         if (elen >= 2)
1206                                 elems->awake_window = (void *)pos;
1207                         break;
1208                 case WLAN_EID_PREQ:
1209                         elems->preq = pos;
1210                         elems->preq_len = elen;
1211                         break;
1212                 case WLAN_EID_PREP:
1213                         elems->prep = pos;
1214                         elems->prep_len = elen;
1215                         break;
1216                 case WLAN_EID_PERR:
1217                         elems->perr = pos;
1218                         elems->perr_len = elen;
1219                         break;
1220                 case WLAN_EID_RANN:
1221                         if (elen >= sizeof(struct ieee80211_rann_ie))
1222                                 elems->rann = (void *)pos;
1223                         else
1224                                 elem_parse_failed = true;
1225                         break;
1226                 case WLAN_EID_CHANNEL_SWITCH:
1227                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1228                                 elem_parse_failed = true;
1229                                 break;
1230                         }
1231                         elems->ch_switch_ie = (void *)pos;
1232                         break;
1233                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1234                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1235                                 elem_parse_failed = true;
1236                                 break;
1237                         }
1238                         elems->ext_chansw_ie = (void *)pos;
1239                         break;
1240                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1241                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1242                                 elem_parse_failed = true;
1243                                 break;
1244                         }
1245                         elems->sec_chan_offs = (void *)pos;
1246                         break;
1247                 case WLAN_EID_CHAN_SWITCH_PARAM:
1248                         if (elen <
1249                             sizeof(*elems->mesh_chansw_params_ie)) {
1250                                 elem_parse_failed = true;
1251                                 break;
1252                         }
1253                         elems->mesh_chansw_params_ie = (void *)pos;
1254                         break;
1255                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1256                         if (!action ||
1257                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1258                                 elem_parse_failed = true;
1259                                 break;
1260                         }
1261                         elems->wide_bw_chansw_ie = (void *)pos;
1262                         break;
1263                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1264                         if (action) {
1265                                 elem_parse_failed = true;
1266                                 break;
1267                         }
1268                         /*
1269                          * This is a bit tricky, but as we only care about
1270                          * the wide bandwidth channel switch element, so
1271                          * just parse it out manually.
1272                          */
1273                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1274                                               pos, elen);
1275                         if (ie) {
1276                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1277                                         elems->wide_bw_chansw_ie =
1278                                                 (void *)(ie + 2);
1279                                 else
1280                                         elem_parse_failed = true;
1281                         }
1282                         break;
1283                 case WLAN_EID_COUNTRY:
1284                         elems->country_elem = pos;
1285                         elems->country_elem_len = elen;
1286                         break;
1287                 case WLAN_EID_PWR_CONSTRAINT:
1288                         if (elen != 1) {
1289                                 elem_parse_failed = true;
1290                                 break;
1291                         }
1292                         elems->pwr_constr_elem = pos;
1293                         break;
1294                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1295                         /* Lots of different options exist, but we only care
1296                          * about the Dynamic Transmit Power Control element.
1297                          * First check for the Cisco OUI, then for the DTPC
1298                          * tag (0x00).
1299                          */
1300                         if (elen < 4) {
1301                                 elem_parse_failed = true;
1302                                 break;
1303                         }
1304
1305                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1306                             pos[2] != 0x96 || pos[3] != 0x00)
1307                                 break;
1308
1309                         if (elen != 6) {
1310                                 elem_parse_failed = true;
1311                                 break;
1312                         }
1313
1314                         if (calc_crc)
1315                                 crc = crc32_be(crc, pos - 2, elen + 2);
1316
1317                         elems->cisco_dtpc_elem = pos;
1318                         break;
1319                 case WLAN_EID_ADDBA_EXT:
1320                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1321                                 elem_parse_failed = true;
1322                                 break;
1323                         }
1324                         elems->addba_ext_ie = (void *)pos;
1325                         break;
1326                 case WLAN_EID_TIMEOUT_INTERVAL:
1327                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1328                                 elems->timeout_int = (void *)pos;
1329                         else
1330                                 elem_parse_failed = true;
1331                         break;
1332                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1333                         if (elen >= sizeof(*elems->max_idle_period_ie))
1334                                 elems->max_idle_period_ie = (void *)pos;
1335                         break;
1336                 case WLAN_EID_RSNX:
1337                         elems->rsnx = pos;
1338                         elems->rsnx_len = elen;
1339                         break;
1340                 case WLAN_EID_TX_POWER_ENVELOPE:
1341                         if (elen < 1 ||
1342                             elen > sizeof(struct ieee80211_tx_pwr_env))
1343                                 break;
1344
1345                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1346                                 break;
1347
1348                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1349                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1350                         elems->tx_pwr_env_num++;
1351                         break;
1352                 case WLAN_EID_EXTENSION:
1353                         ieee80211_parse_extension_element(calc_crc ?
1354                                                                 &crc : NULL,
1355                                                           elem, elems);
1356                         break;
1357                 case WLAN_EID_S1G_CAPABILITIES:
1358                         if (elen >= sizeof(*elems->s1g_capab))
1359                                 elems->s1g_capab = (void *)pos;
1360                         else
1361                                 elem_parse_failed = true;
1362                         break;
1363                 case WLAN_EID_S1G_OPERATION:
1364                         if (elen == sizeof(*elems->s1g_oper))
1365                                 elems->s1g_oper = (void *)pos;
1366                         else
1367                                 elem_parse_failed = true;
1368                         break;
1369                 case WLAN_EID_S1G_BCN_COMPAT:
1370                         if (elen == sizeof(*elems->s1g_bcn_compat))
1371                                 elems->s1g_bcn_compat = (void *)pos;
1372                         else
1373                                 elem_parse_failed = true;
1374                         break;
1375                 case WLAN_EID_AID_RESPONSE:
1376                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1377                                 elems->aid_resp = (void *)pos;
1378                         else
1379                                 elem_parse_failed = true;
1380                         break;
1381                 default:
1382                         break;
1383                 }
1384
1385                 if (elem_parse_failed)
1386                         elems->parse_error = true;
1387                 else
1388                         __set_bit(id, seen_elems);
1389         }
1390
1391         if (!for_each_element_completed(elem, start, len))
1392                 elems->parse_error = true;
1393
1394         return crc;
1395 }
1396
1397 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1398                                             struct ieee802_11_elems *elems,
1399                                             u8 *transmitter_bssid,
1400                                             u8 *bss_bssid,
1401                                             u8 *nontransmitted_profile)
1402 {
1403         const struct element *elem, *sub;
1404         size_t profile_len = 0;
1405         bool found = false;
1406
1407         if (!bss_bssid || !transmitter_bssid)
1408                 return profile_len;
1409
1410         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1411                 if (elem->datalen < 2)
1412                         continue;
1413                 if (elem->data[0] < 1 || elem->data[0] > 8)
1414                         continue;
1415
1416                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1417                         u8 new_bssid[ETH_ALEN];
1418                         const u8 *index;
1419
1420                         if (sub->id != 0 || sub->datalen < 4) {
1421                                 /* not a valid BSS profile */
1422                                 continue;
1423                         }
1424
1425                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1426                             sub->data[1] != 2) {
1427                                 /* The first element of the
1428                                  * Nontransmitted BSSID Profile is not
1429                                  * the Nontransmitted BSSID Capability
1430                                  * element.
1431                                  */
1432                                 continue;
1433                         }
1434
1435                         memset(nontransmitted_profile, 0, len);
1436                         profile_len = cfg80211_merge_profile(start, len,
1437                                                              elem,
1438                                                              sub,
1439                                                              nontransmitted_profile,
1440                                                              len);
1441
1442                         /* found a Nontransmitted BSSID Profile */
1443                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1444                                                  nontransmitted_profile,
1445                                                  profile_len);
1446                         if (!index || index[1] < 1 || index[2] == 0) {
1447                                 /* Invalid MBSSID Index element */
1448                                 continue;
1449                         }
1450
1451                         cfg80211_gen_new_bssid(transmitter_bssid,
1452                                                elem->data[0],
1453                                                index[2],
1454                                                new_bssid);
1455                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1456                                 found = true;
1457                                 elems->bssid_index_len = index[1];
1458                                 elems->bssid_index = (void *)&index[2];
1459                                 break;
1460                         }
1461                 }
1462         }
1463
1464         return found ? profile_len : 0;
1465 }
1466
1467 void ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1468                                 struct ieee802_11_elems *elems,
1469                                 u64 filter, u32 crc, u8 *transmitter_bssid,
1470                                 u8 *bss_bssid)
1471 {
1472         const struct element *non_inherit = NULL;
1473         u8 *nontransmitted_profile;
1474         int nontransmitted_profile_len = 0;
1475
1476         memset(elems, 0, sizeof(*elems));
1477         elems->ie_start = start;
1478         elems->total_len = len;
1479
1480         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1481         if (nontransmitted_profile) {
1482                 nontransmitted_profile_len =
1483                         ieee802_11_find_bssid_profile(start, len, elems,
1484                                                       transmitter_bssid,
1485                                                       bss_bssid,
1486                                                       nontransmitted_profile);
1487                 non_inherit =
1488                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1489                                                nontransmitted_profile,
1490                                                nontransmitted_profile_len);
1491         }
1492
1493         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1494                                           crc, non_inherit);
1495
1496         /* Override with nontransmitted profile, if found */
1497         if (nontransmitted_profile_len)
1498                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1499                                             nontransmitted_profile_len,
1500                                             action, elems, 0, 0, NULL);
1501
1502         if (elems->tim && !elems->parse_error) {
1503                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1504
1505                 elems->dtim_period = tim_ie->dtim_period;
1506                 elems->dtim_count = tim_ie->dtim_count;
1507         }
1508
1509         /* Override DTIM period and count if needed */
1510         if (elems->bssid_index &&
1511             elems->bssid_index_len >=
1512             offsetofend(struct ieee80211_bssid_index, dtim_period))
1513                 elems->dtim_period = elems->bssid_index->dtim_period;
1514
1515         if (elems->bssid_index &&
1516             elems->bssid_index_len >=
1517             offsetofend(struct ieee80211_bssid_index, dtim_count))
1518                 elems->dtim_count = elems->bssid_index->dtim_count;
1519
1520         kfree(nontransmitted_profile);
1521
1522         elems->crc = crc;
1523 }
1524
1525 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1526                                            struct ieee80211_tx_queue_params
1527                                            *qparam, int ac)
1528 {
1529         struct ieee80211_chanctx_conf *chanctx_conf;
1530         const struct ieee80211_reg_rule *rrule;
1531         const struct ieee80211_wmm_ac *wmm_ac;
1532         u16 center_freq = 0;
1533
1534         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1535             sdata->vif.type != NL80211_IFTYPE_STATION)
1536                 return;
1537
1538         rcu_read_lock();
1539         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1540         if (chanctx_conf)
1541                 center_freq = chanctx_conf->def.chan->center_freq;
1542
1543         if (!center_freq) {
1544                 rcu_read_unlock();
1545                 return;
1546         }
1547
1548         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1549
1550         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1551                 rcu_read_unlock();
1552                 return;
1553         }
1554
1555         if (sdata->vif.type == NL80211_IFTYPE_AP)
1556                 wmm_ac = &rrule->wmm_rule.ap[ac];
1557         else
1558                 wmm_ac = &rrule->wmm_rule.client[ac];
1559         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1560         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1561         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1562         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1563         rcu_read_unlock();
1564 }
1565
1566 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1567                                bool bss_notify, bool enable_qos)
1568 {
1569         struct ieee80211_local *local = sdata->local;
1570         struct ieee80211_tx_queue_params qparam;
1571         struct ieee80211_chanctx_conf *chanctx_conf;
1572         int ac;
1573         bool use_11b;
1574         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1575         int aCWmin, aCWmax;
1576
1577         if (!local->ops->conf_tx)
1578                 return;
1579
1580         if (local->hw.queues < IEEE80211_NUM_ACS)
1581                 return;
1582
1583         memset(&qparam, 0, sizeof(qparam));
1584
1585         rcu_read_lock();
1586         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1587         use_11b = (chanctx_conf &&
1588                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1589                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1590         rcu_read_unlock();
1591
1592         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1593
1594         /* Set defaults according to 802.11-2007 Table 7-37 */
1595         aCWmax = 1023;
1596         if (use_11b)
1597                 aCWmin = 31;
1598         else
1599                 aCWmin = 15;
1600
1601         /* Confiure old 802.11b/g medium access rules. */
1602         qparam.cw_max = aCWmax;
1603         qparam.cw_min = aCWmin;
1604         qparam.txop = 0;
1605         qparam.aifs = 2;
1606
1607         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1608                 /* Update if QoS is enabled. */
1609                 if (enable_qos) {
1610                         switch (ac) {
1611                         case IEEE80211_AC_BK:
1612                                 qparam.cw_max = aCWmax;
1613                                 qparam.cw_min = aCWmin;
1614                                 qparam.txop = 0;
1615                                 if (is_ocb)
1616                                         qparam.aifs = 9;
1617                                 else
1618                                         qparam.aifs = 7;
1619                                 break;
1620                         /* never happens but let's not leave undefined */
1621                         default:
1622                         case IEEE80211_AC_BE:
1623                                 qparam.cw_max = aCWmax;
1624                                 qparam.cw_min = aCWmin;
1625                                 qparam.txop = 0;
1626                                 if (is_ocb)
1627                                         qparam.aifs = 6;
1628                                 else
1629                                         qparam.aifs = 3;
1630                                 break;
1631                         case IEEE80211_AC_VI:
1632                                 qparam.cw_max = aCWmin;
1633                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1634                                 if (is_ocb)
1635                                         qparam.txop = 0;
1636                                 else if (use_11b)
1637                                         qparam.txop = 6016/32;
1638                                 else
1639                                         qparam.txop = 3008/32;
1640
1641                                 if (is_ocb)
1642                                         qparam.aifs = 3;
1643                                 else
1644                                         qparam.aifs = 2;
1645                                 break;
1646                         case IEEE80211_AC_VO:
1647                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1648                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1649                                 if (is_ocb)
1650                                         qparam.txop = 0;
1651                                 else if (use_11b)
1652                                         qparam.txop = 3264/32;
1653                                 else
1654                                         qparam.txop = 1504/32;
1655                                 qparam.aifs = 2;
1656                                 break;
1657                         }
1658                 }
1659                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1660
1661                 qparam.uapsd = false;
1662
1663                 sdata->tx_conf[ac] = qparam;
1664                 drv_conf_tx(local, sdata, ac, &qparam);
1665         }
1666
1667         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1668             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1669             sdata->vif.type != NL80211_IFTYPE_NAN) {
1670                 sdata->vif.bss_conf.qos = enable_qos;
1671                 if (bss_notify)
1672                         ieee80211_bss_info_change_notify(sdata,
1673                                                          BSS_CHANGED_QOS);
1674         }
1675 }
1676
1677 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1678                          u16 transaction, u16 auth_alg, u16 status,
1679                          const u8 *extra, size_t extra_len, const u8 *da,
1680                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1681                          u32 tx_flags)
1682 {
1683         struct ieee80211_local *local = sdata->local;
1684         struct sk_buff *skb;
1685         struct ieee80211_mgmt *mgmt;
1686         int err;
1687
1688         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1689         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1690                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1691         if (!skb)
1692                 return;
1693
1694         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1695
1696         mgmt = skb_put_zero(skb, 24 + 6);
1697         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1698                                           IEEE80211_STYPE_AUTH);
1699         memcpy(mgmt->da, da, ETH_ALEN);
1700         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1701         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1702         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1703         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1704         mgmt->u.auth.status_code = cpu_to_le16(status);
1705         if (extra)
1706                 skb_put_data(skb, extra, extra_len);
1707
1708         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1709                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1710                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1711                 if (WARN_ON(err)) {
1712                         kfree_skb(skb);
1713                         return;
1714                 }
1715         }
1716
1717         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1718                                         tx_flags;
1719         ieee80211_tx_skb(sdata, skb);
1720 }
1721
1722 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1723                                     const u8 *da, const u8 *bssid,
1724                                     u16 stype, u16 reason,
1725                                     bool send_frame, u8 *frame_buf)
1726 {
1727         struct ieee80211_local *local = sdata->local;
1728         struct sk_buff *skb;
1729         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1730
1731         /* build frame */
1732         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1733         mgmt->duration = 0; /* initialize only */
1734         mgmt->seq_ctrl = 0; /* initialize only */
1735         memcpy(mgmt->da, da, ETH_ALEN);
1736         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1737         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1738         /* u.deauth.reason_code == u.disassoc.reason_code */
1739         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1740
1741         if (send_frame) {
1742                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1743                                     IEEE80211_DEAUTH_FRAME_LEN);
1744                 if (!skb)
1745                         return;
1746
1747                 skb_reserve(skb, local->hw.extra_tx_headroom);
1748
1749                 /* copy in frame */
1750                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1751
1752                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1753                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1754                         IEEE80211_SKB_CB(skb)->flags |=
1755                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1756
1757                 ieee80211_tx_skb(sdata, skb);
1758         }
1759 }
1760
1761 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1762 {
1763         if ((end - pos) < 5)
1764                 return pos;
1765
1766         *pos++ = WLAN_EID_EXTENSION;
1767         *pos++ = 1 + sizeof(cap);
1768         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1769         memcpy(pos, &cap, sizeof(cap));
1770
1771         return pos + 2;
1772 }
1773
1774 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1775                                          u8 *buffer, size_t buffer_len,
1776                                          const u8 *ie, size_t ie_len,
1777                                          enum nl80211_band band,
1778                                          u32 rate_mask,
1779                                          struct cfg80211_chan_def *chandef,
1780                                          size_t *offset, u32 flags)
1781 {
1782         struct ieee80211_local *local = sdata->local;
1783         struct ieee80211_supported_band *sband;
1784         const struct ieee80211_sta_he_cap *he_cap;
1785         u8 *pos = buffer, *end = buffer + buffer_len;
1786         size_t noffset;
1787         int supp_rates_len, i;
1788         u8 rates[32];
1789         int num_rates;
1790         int ext_rates_len;
1791         int shift;
1792         u32 rate_flags;
1793         bool have_80mhz = false;
1794
1795         *offset = 0;
1796
1797         sband = local->hw.wiphy->bands[band];
1798         if (WARN_ON_ONCE(!sband))
1799                 return 0;
1800
1801         rate_flags = ieee80211_chandef_rate_flags(chandef);
1802         shift = ieee80211_chandef_get_shift(chandef);
1803
1804         num_rates = 0;
1805         for (i = 0; i < sband->n_bitrates; i++) {
1806                 if ((BIT(i) & rate_mask) == 0)
1807                         continue; /* skip rate */
1808                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1809                         continue;
1810
1811                 rates[num_rates++] =
1812                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1813                                           (1 << shift) * 5);
1814         }
1815
1816         supp_rates_len = min_t(int, num_rates, 8);
1817
1818         if (end - pos < 2 + supp_rates_len)
1819                 goto out_err;
1820         *pos++ = WLAN_EID_SUPP_RATES;
1821         *pos++ = supp_rates_len;
1822         memcpy(pos, rates, supp_rates_len);
1823         pos += supp_rates_len;
1824
1825         /* insert "request information" if in custom IEs */
1826         if (ie && ie_len) {
1827                 static const u8 before_extrates[] = {
1828                         WLAN_EID_SSID,
1829                         WLAN_EID_SUPP_RATES,
1830                         WLAN_EID_REQUEST,
1831                 };
1832                 noffset = ieee80211_ie_split(ie, ie_len,
1833                                              before_extrates,
1834                                              ARRAY_SIZE(before_extrates),
1835                                              *offset);
1836                 if (end - pos < noffset - *offset)
1837                         goto out_err;
1838                 memcpy(pos, ie + *offset, noffset - *offset);
1839                 pos += noffset - *offset;
1840                 *offset = noffset;
1841         }
1842
1843         ext_rates_len = num_rates - supp_rates_len;
1844         if (ext_rates_len > 0) {
1845                 if (end - pos < 2 + ext_rates_len)
1846                         goto out_err;
1847                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1848                 *pos++ = ext_rates_len;
1849                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1850                 pos += ext_rates_len;
1851         }
1852
1853         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1854                 if (end - pos < 3)
1855                         goto out_err;
1856                 *pos++ = WLAN_EID_DS_PARAMS;
1857                 *pos++ = 1;
1858                 *pos++ = ieee80211_frequency_to_channel(
1859                                 chandef->chan->center_freq);
1860         }
1861
1862         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1863                 goto done;
1864
1865         /* insert custom IEs that go before HT */
1866         if (ie && ie_len) {
1867                 static const u8 before_ht[] = {
1868                         /*
1869                          * no need to list the ones split off already
1870                          * (or generated here)
1871                          */
1872                         WLAN_EID_DS_PARAMS,
1873                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1874                 };
1875                 noffset = ieee80211_ie_split(ie, ie_len,
1876                                              before_ht, ARRAY_SIZE(before_ht),
1877                                              *offset);
1878                 if (end - pos < noffset - *offset)
1879                         goto out_err;
1880                 memcpy(pos, ie + *offset, noffset - *offset);
1881                 pos += noffset - *offset;
1882                 *offset = noffset;
1883         }
1884
1885         if (sband->ht_cap.ht_supported) {
1886                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1887                         goto out_err;
1888                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1889                                                 sband->ht_cap.cap);
1890         }
1891
1892         /* insert custom IEs that go before VHT */
1893         if (ie && ie_len) {
1894                 static const u8 before_vht[] = {
1895                         /*
1896                          * no need to list the ones split off already
1897                          * (or generated here)
1898                          */
1899                         WLAN_EID_BSS_COEX_2040,
1900                         WLAN_EID_EXT_CAPABILITY,
1901                         WLAN_EID_SSID_LIST,
1902                         WLAN_EID_CHANNEL_USAGE,
1903                         WLAN_EID_INTERWORKING,
1904                         WLAN_EID_MESH_ID,
1905                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1906                 };
1907                 noffset = ieee80211_ie_split(ie, ie_len,
1908                                              before_vht, ARRAY_SIZE(before_vht),
1909                                              *offset);
1910                 if (end - pos < noffset - *offset)
1911                         goto out_err;
1912                 memcpy(pos, ie + *offset, noffset - *offset);
1913                 pos += noffset - *offset;
1914                 *offset = noffset;
1915         }
1916
1917         /* Check if any channel in this sband supports at least 80 MHz */
1918         for (i = 0; i < sband->n_channels; i++) {
1919                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1920                                                 IEEE80211_CHAN_NO_80MHZ))
1921                         continue;
1922
1923                 have_80mhz = true;
1924                 break;
1925         }
1926
1927         if (sband->vht_cap.vht_supported && have_80mhz) {
1928                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1929                         goto out_err;
1930                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1931                                                  sband->vht_cap.cap);
1932         }
1933
1934         /* insert custom IEs that go before HE */
1935         if (ie && ie_len) {
1936                 static const u8 before_he[] = {
1937                         /*
1938                          * no need to list the ones split off before VHT
1939                          * or generated here
1940                          */
1941                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1942                         WLAN_EID_AP_CSN,
1943                         /* TODO: add 11ah/11aj/11ak elements */
1944                 };
1945                 noffset = ieee80211_ie_split(ie, ie_len,
1946                                              before_he, ARRAY_SIZE(before_he),
1947                                              *offset);
1948                 if (end - pos < noffset - *offset)
1949                         goto out_err;
1950                 memcpy(pos, ie + *offset, noffset - *offset);
1951                 pos += noffset - *offset;
1952                 *offset = noffset;
1953         }
1954
1955         he_cap = ieee80211_get_he_iftype_cap(sband,
1956                                              ieee80211_vif_type_p2p(&sdata->vif));
1957         if (he_cap &&
1958             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1959                                          IEEE80211_CHAN_NO_HE)) {
1960                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
1961                 if (!pos)
1962                         goto out_err;
1963         }
1964
1965         if (cfg80211_any_usable_channels(local->hw.wiphy,
1966                                          BIT(NL80211_BAND_6GHZ),
1967                                          IEEE80211_CHAN_NO_HE)) {
1968                 struct ieee80211_supported_band *sband6;
1969
1970                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1971                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1972                                 ieee80211_vif_type_p2p(&sdata->vif));
1973
1974                 if (he_cap) {
1975                         enum nl80211_iftype iftype =
1976                                 ieee80211_vif_type_p2p(&sdata->vif);
1977                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1978
1979                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1980                 }
1981         }
1982
1983         /*
1984          * If adding more here, adjust code in main.c
1985          * that calculates local->scan_ies_len.
1986          */
1987
1988         return pos - buffer;
1989  out_err:
1990         WARN_ONCE(1, "not enough space for preq IEs\n");
1991  done:
1992         return pos - buffer;
1993 }
1994
1995 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1996                              size_t buffer_len,
1997                              struct ieee80211_scan_ies *ie_desc,
1998                              const u8 *ie, size_t ie_len,
1999                              u8 bands_used, u32 *rate_masks,
2000                              struct cfg80211_chan_def *chandef,
2001                              u32 flags)
2002 {
2003         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2004         int i;
2005
2006         memset(ie_desc, 0, sizeof(*ie_desc));
2007
2008         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2009                 if (bands_used & BIT(i)) {
2010                         pos += ieee80211_build_preq_ies_band(sdata,
2011                                                              buffer + pos,
2012                                                              buffer_len - pos,
2013                                                              ie, ie_len, i,
2014                                                              rate_masks[i],
2015                                                              chandef,
2016                                                              &custom_ie_offset,
2017                                                              flags);
2018                         ie_desc->ies[i] = buffer + old_pos;
2019                         ie_desc->len[i] = pos - old_pos;
2020                         old_pos = pos;
2021                 }
2022         }
2023
2024         /* add any remaining custom IEs */
2025         if (ie && ie_len) {
2026                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2027                               "not enough space for preq custom IEs\n"))
2028                         return pos;
2029                 memcpy(buffer + pos, ie + custom_ie_offset,
2030                        ie_len - custom_ie_offset);
2031                 ie_desc->common_ies = buffer + pos;
2032                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2033                 pos += ie_len - custom_ie_offset;
2034         }
2035
2036         return pos;
2037 };
2038
2039 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2040                                           const u8 *src, const u8 *dst,
2041                                           u32 ratemask,
2042                                           struct ieee80211_channel *chan,
2043                                           const u8 *ssid, size_t ssid_len,
2044                                           const u8 *ie, size_t ie_len,
2045                                           u32 flags)
2046 {
2047         struct ieee80211_local *local = sdata->local;
2048         struct cfg80211_chan_def chandef;
2049         struct sk_buff *skb;
2050         struct ieee80211_mgmt *mgmt;
2051         int ies_len;
2052         u32 rate_masks[NUM_NL80211_BANDS] = {};
2053         struct ieee80211_scan_ies dummy_ie_desc;
2054
2055         /*
2056          * Do not send DS Channel parameter for directed probe requests
2057          * in order to maximize the chance that we get a response.  Some
2058          * badly-behaved APs don't respond when this parameter is included.
2059          */
2060         chandef.width = sdata->vif.bss_conf.chandef.width;
2061         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2062                 chandef.chan = NULL;
2063         else
2064                 chandef.chan = chan;
2065
2066         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2067                                      100 + ie_len);
2068         if (!skb)
2069                 return NULL;
2070
2071         rate_masks[chan->band] = ratemask;
2072         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2073                                            skb_tailroom(skb), &dummy_ie_desc,
2074                                            ie, ie_len, BIT(chan->band),
2075                                            rate_masks, &chandef, flags);
2076         skb_put(skb, ies_len);
2077
2078         if (dst) {
2079                 mgmt = (struct ieee80211_mgmt *) skb->data;
2080                 memcpy(mgmt->da, dst, ETH_ALEN);
2081                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2082         }
2083
2084         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2085
2086         return skb;
2087 }
2088
2089 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2090                             struct ieee802_11_elems *elems,
2091                             enum nl80211_band band, u32 *basic_rates)
2092 {
2093         struct ieee80211_supported_band *sband;
2094         size_t num_rates;
2095         u32 supp_rates, rate_flags;
2096         int i, j, shift;
2097
2098         sband = sdata->local->hw.wiphy->bands[band];
2099         if (WARN_ON(!sband))
2100                 return 1;
2101
2102         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2103         shift = ieee80211_vif_get_shift(&sdata->vif);
2104
2105         num_rates = sband->n_bitrates;
2106         supp_rates = 0;
2107         for (i = 0; i < elems->supp_rates_len +
2108                      elems->ext_supp_rates_len; i++) {
2109                 u8 rate = 0;
2110                 int own_rate;
2111                 bool is_basic;
2112                 if (i < elems->supp_rates_len)
2113                         rate = elems->supp_rates[i];
2114                 else if (elems->ext_supp_rates)
2115                         rate = elems->ext_supp_rates
2116                                 [i - elems->supp_rates_len];
2117                 own_rate = 5 * (rate & 0x7f);
2118                 is_basic = !!(rate & 0x80);
2119
2120                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2121                         continue;
2122
2123                 for (j = 0; j < num_rates; j++) {
2124                         int brate;
2125                         if ((rate_flags & sband->bitrates[j].flags)
2126                             != rate_flags)
2127                                 continue;
2128
2129                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2130                                              1 << shift);
2131
2132                         if (brate == own_rate) {
2133                                 supp_rates |= BIT(j);
2134                                 if (basic_rates && is_basic)
2135                                         *basic_rates |= BIT(j);
2136                         }
2137                 }
2138         }
2139         return supp_rates;
2140 }
2141
2142 void ieee80211_stop_device(struct ieee80211_local *local)
2143 {
2144         ieee80211_led_radio(local, false);
2145         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2146
2147         cancel_work_sync(&local->reconfig_filter);
2148
2149         flush_workqueue(local->workqueue);
2150         drv_stop(local);
2151 }
2152
2153 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2154                                            bool aborted)
2155 {
2156         /* It's possible that we don't handle the scan completion in
2157          * time during suspend, so if it's still marked as completed
2158          * here, queue the work and flush it to clean things up.
2159          * Instead of calling the worker function directly here, we
2160          * really queue it to avoid potential races with other flows
2161          * scheduling the same work.
2162          */
2163         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2164                 /* If coming from reconfiguration failure, abort the scan so
2165                  * we don't attempt to continue a partial HW scan - which is
2166                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2167                  * completed scan, and a 5 GHz portion is still pending.
2168                  */
2169                 if (aborted)
2170                         set_bit(SCAN_ABORTED, &local->scanning);
2171                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2172                 flush_delayed_work(&local->scan_work);
2173         }
2174 }
2175
2176 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2177 {
2178         struct ieee80211_sub_if_data *sdata;
2179         struct ieee80211_chanctx *ctx;
2180
2181         /*
2182          * We get here if during resume the device can't be restarted properly.
2183          * We might also get here if this happens during HW reset, which is a
2184          * slightly different situation and we need to drop all connections in
2185          * the latter case.
2186          *
2187          * Ask cfg80211 to turn off all interfaces, this will result in more
2188          * warnings but at least we'll then get into a clean stopped state.
2189          */
2190
2191         local->resuming = false;
2192         local->suspended = false;
2193         local->in_reconfig = false;
2194
2195         ieee80211_flush_completed_scan(local, true);
2196
2197         /* scheduled scan clearly can't be running any more, but tell
2198          * cfg80211 and clear local state
2199          */
2200         ieee80211_sched_scan_end(local);
2201
2202         list_for_each_entry(sdata, &local->interfaces, list)
2203                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2204
2205         /* Mark channel contexts as not being in the driver any more to avoid
2206          * removing them from the driver during the shutdown process...
2207          */
2208         mutex_lock(&local->chanctx_mtx);
2209         list_for_each_entry(ctx, &local->chanctx_list, list)
2210                 ctx->driver_present = false;
2211         mutex_unlock(&local->chanctx_mtx);
2212 }
2213
2214 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2215                                      struct ieee80211_sub_if_data *sdata)
2216 {
2217         struct ieee80211_chanctx_conf *conf;
2218         struct ieee80211_chanctx *ctx;
2219
2220         if (!local->use_chanctx)
2221                 return;
2222
2223         mutex_lock(&local->chanctx_mtx);
2224         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2225                                          lockdep_is_held(&local->chanctx_mtx));
2226         if (conf) {
2227                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2228                 drv_assign_vif_chanctx(local, sdata, ctx);
2229         }
2230         mutex_unlock(&local->chanctx_mtx);
2231 }
2232
2233 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2234 {
2235         struct ieee80211_local *local = sdata->local;
2236         struct sta_info *sta;
2237
2238         /* add STAs back */
2239         mutex_lock(&local->sta_mtx);
2240         list_for_each_entry(sta, &local->sta_list, list) {
2241                 enum ieee80211_sta_state state;
2242
2243                 if (!sta->uploaded || sta->sdata != sdata)
2244                         continue;
2245
2246                 for (state = IEEE80211_STA_NOTEXIST;
2247                      state < sta->sta_state; state++)
2248                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2249                                               state + 1));
2250         }
2251         mutex_unlock(&local->sta_mtx);
2252 }
2253
2254 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2255 {
2256         struct cfg80211_nan_func *func, **funcs;
2257         int res, id, i = 0;
2258
2259         res = drv_start_nan(sdata->local, sdata,
2260                             &sdata->u.nan.conf);
2261         if (WARN_ON(res))
2262                 return res;
2263
2264         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2265                         sizeof(*funcs),
2266                         GFP_KERNEL);
2267         if (!funcs)
2268                 return -ENOMEM;
2269
2270         /* Add all the functions:
2271          * This is a little bit ugly. We need to call a potentially sleeping
2272          * callback for each NAN function, so we can't hold the spinlock.
2273          */
2274         spin_lock_bh(&sdata->u.nan.func_lock);
2275
2276         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2277                 funcs[i++] = func;
2278
2279         spin_unlock_bh(&sdata->u.nan.func_lock);
2280
2281         for (i = 0; funcs[i]; i++) {
2282                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2283                 if (WARN_ON(res))
2284                         ieee80211_nan_func_terminated(&sdata->vif,
2285                                                       funcs[i]->instance_id,
2286                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2287                                                       GFP_KERNEL);
2288         }
2289
2290         kfree(funcs);
2291
2292         return 0;
2293 }
2294
2295 int ieee80211_reconfig(struct ieee80211_local *local)
2296 {
2297         struct ieee80211_hw *hw = &local->hw;
2298         struct ieee80211_sub_if_data *sdata;
2299         struct ieee80211_chanctx *ctx;
2300         struct sta_info *sta;
2301         int res, i;
2302         bool reconfig_due_to_wowlan = false;
2303         struct ieee80211_sub_if_data *sched_scan_sdata;
2304         struct cfg80211_sched_scan_request *sched_scan_req;
2305         bool sched_scan_stopped = false;
2306         bool suspended = local->suspended;
2307
2308         /* nothing to do if HW shouldn't run */
2309         if (!local->open_count)
2310                 goto wake_up;
2311
2312 #ifdef CONFIG_PM
2313         if (suspended)
2314                 local->resuming = true;
2315
2316         if (local->wowlan) {
2317                 /*
2318                  * In the wowlan case, both mac80211 and the device
2319                  * are functional when the resume op is called, so
2320                  * clear local->suspended so the device could operate
2321                  * normally (e.g. pass rx frames).
2322                  */
2323                 local->suspended = false;
2324                 res = drv_resume(local);
2325                 local->wowlan = false;
2326                 if (res < 0) {
2327                         local->resuming = false;
2328                         return res;
2329                 }
2330                 if (res == 0)
2331                         goto wake_up;
2332                 WARN_ON(res > 1);
2333                 /*
2334                  * res is 1, which means the driver requested
2335                  * to go through a regular reset on wakeup.
2336                  * restore local->suspended in this case.
2337                  */
2338                 reconfig_due_to_wowlan = true;
2339                 local->suspended = true;
2340         }
2341 #endif
2342
2343         /*
2344          * In case of hw_restart during suspend (without wowlan),
2345          * cancel restart work, as we are reconfiguring the device
2346          * anyway.
2347          * Note that restart_work is scheduled on a frozen workqueue,
2348          * so we can't deadlock in this case.
2349          */
2350         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2351                 cancel_work_sync(&local->restart_work);
2352
2353         local->started = false;
2354
2355         /*
2356          * Upon resume hardware can sometimes be goofy due to
2357          * various platform / driver / bus issues, so restarting
2358          * the device may at times not work immediately. Propagate
2359          * the error.
2360          */
2361         res = drv_start(local);
2362         if (res) {
2363                 if (suspended)
2364                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2365                 else
2366                         WARN(1, "Hardware became unavailable during restart.\n");
2367                 ieee80211_handle_reconfig_failure(local);
2368                 return res;
2369         }
2370
2371         /* setup fragmentation threshold */
2372         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2373
2374         /* setup RTS threshold */
2375         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2376
2377         /* reset coverage class */
2378         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2379
2380         ieee80211_led_radio(local, true);
2381         ieee80211_mod_tpt_led_trig(local,
2382                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2383
2384         /* add interfaces */
2385         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2386         if (sdata) {
2387                 /* in HW restart it exists already */
2388                 WARN_ON(local->resuming);
2389                 res = drv_add_interface(local, sdata);
2390                 if (WARN_ON(res)) {
2391                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2392                         synchronize_net();
2393                         kfree(sdata);
2394                 }
2395         }
2396
2397         list_for_each_entry(sdata, &local->interfaces, list) {
2398                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2399                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2400                     ieee80211_sdata_running(sdata)) {
2401                         res = drv_add_interface(local, sdata);
2402                         if (WARN_ON(res))
2403                                 break;
2404                 }
2405         }
2406
2407         /* If adding any of the interfaces failed above, roll back and
2408          * report failure.
2409          */
2410         if (res) {
2411                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2412                                                      list)
2413                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2414                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2415                             ieee80211_sdata_running(sdata))
2416                                 drv_remove_interface(local, sdata);
2417                 ieee80211_handle_reconfig_failure(local);
2418                 return res;
2419         }
2420
2421         /* add channel contexts */
2422         if (local->use_chanctx) {
2423                 mutex_lock(&local->chanctx_mtx);
2424                 list_for_each_entry(ctx, &local->chanctx_list, list)
2425                         if (ctx->replace_state !=
2426                             IEEE80211_CHANCTX_REPLACES_OTHER)
2427                                 WARN_ON(drv_add_chanctx(local, ctx));
2428                 mutex_unlock(&local->chanctx_mtx);
2429
2430                 sdata = wiphy_dereference(local->hw.wiphy,
2431                                           local->monitor_sdata);
2432                 if (sdata && ieee80211_sdata_running(sdata))
2433                         ieee80211_assign_chanctx(local, sdata);
2434         }
2435
2436         /* reconfigure hardware */
2437         ieee80211_hw_config(local, ~0);
2438
2439         ieee80211_configure_filter(local);
2440
2441         /* Finally also reconfigure all the BSS information */
2442         list_for_each_entry(sdata, &local->interfaces, list) {
2443                 u32 changed;
2444
2445                 if (!ieee80211_sdata_running(sdata))
2446                         continue;
2447
2448                 ieee80211_assign_chanctx(local, sdata);
2449
2450                 switch (sdata->vif.type) {
2451                 case NL80211_IFTYPE_AP_VLAN:
2452                 case NL80211_IFTYPE_MONITOR:
2453                         break;
2454                 case NL80211_IFTYPE_ADHOC:
2455                         if (sdata->vif.bss_conf.ibss_joined)
2456                                 WARN_ON(drv_join_ibss(local, sdata));
2457                         fallthrough;
2458                 default:
2459                         ieee80211_reconfig_stations(sdata);
2460                         fallthrough;
2461                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2462                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2463                                 drv_conf_tx(local, sdata, i,
2464                                             &sdata->tx_conf[i]);
2465                         break;
2466                 }
2467
2468                 /* common change flags for all interface types */
2469                 changed = BSS_CHANGED_ERP_CTS_PROT |
2470                           BSS_CHANGED_ERP_PREAMBLE |
2471                           BSS_CHANGED_ERP_SLOT |
2472                           BSS_CHANGED_HT |
2473                           BSS_CHANGED_BASIC_RATES |
2474                           BSS_CHANGED_BEACON_INT |
2475                           BSS_CHANGED_BSSID |
2476                           BSS_CHANGED_CQM |
2477                           BSS_CHANGED_QOS |
2478                           BSS_CHANGED_IDLE |
2479                           BSS_CHANGED_TXPOWER |
2480                           BSS_CHANGED_MCAST_RATE;
2481
2482                 if (sdata->vif.mu_mimo_owner)
2483                         changed |= BSS_CHANGED_MU_GROUPS;
2484
2485                 switch (sdata->vif.type) {
2486                 case NL80211_IFTYPE_STATION:
2487                         changed |= BSS_CHANGED_ASSOC |
2488                                    BSS_CHANGED_ARP_FILTER |
2489                                    BSS_CHANGED_PS;
2490
2491                         /* Re-send beacon info report to the driver */
2492                         if (sdata->u.mgd.have_beacon)
2493                                 changed |= BSS_CHANGED_BEACON_INFO;
2494
2495                         if (sdata->vif.bss_conf.max_idle_period ||
2496                             sdata->vif.bss_conf.protected_keep_alive)
2497                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2498
2499                         sdata_lock(sdata);
2500                         ieee80211_bss_info_change_notify(sdata, changed);
2501                         sdata_unlock(sdata);
2502                         break;
2503                 case NL80211_IFTYPE_OCB:
2504                         changed |= BSS_CHANGED_OCB;
2505                         ieee80211_bss_info_change_notify(sdata, changed);
2506                         break;
2507                 case NL80211_IFTYPE_ADHOC:
2508                         changed |= BSS_CHANGED_IBSS;
2509                         fallthrough;
2510                 case NL80211_IFTYPE_AP:
2511                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2512
2513                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2514                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2515                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2516                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2517
2518                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2519                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2520
2521                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2522                                         drv_start_ap(local, sdata);
2523                         }
2524                         fallthrough;
2525                 case NL80211_IFTYPE_MESH_POINT:
2526                         if (sdata->vif.bss_conf.enable_beacon) {
2527                                 changed |= BSS_CHANGED_BEACON |
2528                                            BSS_CHANGED_BEACON_ENABLED;
2529                                 ieee80211_bss_info_change_notify(sdata, changed);
2530                         }
2531                         break;
2532                 case NL80211_IFTYPE_NAN:
2533                         res = ieee80211_reconfig_nan(sdata);
2534                         if (res < 0) {
2535                                 ieee80211_handle_reconfig_failure(local);
2536                                 return res;
2537                         }
2538                         break;
2539                 case NL80211_IFTYPE_AP_VLAN:
2540                 case NL80211_IFTYPE_MONITOR:
2541                 case NL80211_IFTYPE_P2P_DEVICE:
2542                         /* nothing to do */
2543                         break;
2544                 case NL80211_IFTYPE_UNSPECIFIED:
2545                 case NUM_NL80211_IFTYPES:
2546                 case NL80211_IFTYPE_P2P_CLIENT:
2547                 case NL80211_IFTYPE_P2P_GO:
2548                 case NL80211_IFTYPE_WDS:
2549                         WARN_ON(1);
2550                         break;
2551                 }
2552         }
2553
2554         ieee80211_recalc_ps(local);
2555
2556         /*
2557          * The sta might be in psm against the ap (e.g. because
2558          * this was the state before a hw restart), so we
2559          * explicitly send a null packet in order to make sure
2560          * it'll sync against the ap (and get out of psm).
2561          */
2562         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2563                 list_for_each_entry(sdata, &local->interfaces, list) {
2564                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2565                                 continue;
2566                         if (!sdata->u.mgd.associated)
2567                                 continue;
2568
2569                         ieee80211_send_nullfunc(local, sdata, false);
2570                 }
2571         }
2572
2573         /* APs are now beaconing, add back stations */
2574         mutex_lock(&local->sta_mtx);
2575         list_for_each_entry(sta, &local->sta_list, list) {
2576                 enum ieee80211_sta_state state;
2577
2578                 if (!sta->uploaded)
2579                         continue;
2580
2581                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2582                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2583                         continue;
2584
2585                 for (state = IEEE80211_STA_NOTEXIST;
2586                      state < sta->sta_state; state++)
2587                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2588                                               state + 1));
2589         }
2590         mutex_unlock(&local->sta_mtx);
2591
2592         /* add back keys */
2593         list_for_each_entry(sdata, &local->interfaces, list)
2594                 ieee80211_reenable_keys(sdata);
2595
2596         /* Reconfigure sched scan if it was interrupted by FW restart */
2597         mutex_lock(&local->mtx);
2598         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2599                                                 lockdep_is_held(&local->mtx));
2600         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2601                                                 lockdep_is_held(&local->mtx));
2602         if (sched_scan_sdata && sched_scan_req)
2603                 /*
2604                  * Sched scan stopped, but we don't want to report it. Instead,
2605                  * we're trying to reschedule. However, if more than one scan
2606                  * plan was set, we cannot reschedule since we don't know which
2607                  * scan plan was currently running (and some scan plans may have
2608                  * already finished).
2609                  */
2610                 if (sched_scan_req->n_scan_plans > 1 ||
2611                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2612                                                          sched_scan_req)) {
2613                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2614                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2615                         sched_scan_stopped = true;
2616                 }
2617         mutex_unlock(&local->mtx);
2618
2619         if (sched_scan_stopped)
2620                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2621
2622  wake_up:
2623
2624         if (local->monitors == local->open_count && local->monitors > 0)
2625                 ieee80211_add_virtual_monitor(local);
2626
2627         /*
2628          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2629          * sessions can be established after a resume.
2630          *
2631          * Also tear down aggregation sessions since reconfiguring
2632          * them in a hardware restart scenario is not easily done
2633          * right now, and the hardware will have lost information
2634          * about the sessions, but we and the AP still think they
2635          * are active. This is really a workaround though.
2636          */
2637         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2638                 mutex_lock(&local->sta_mtx);
2639
2640                 list_for_each_entry(sta, &local->sta_list, list) {
2641                         if (!local->resuming)
2642                                 ieee80211_sta_tear_down_BA_sessions(
2643                                                 sta, AGG_STOP_LOCAL_REQUEST);
2644                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2645                 }
2646
2647                 mutex_unlock(&local->sta_mtx);
2648         }
2649
2650         if (local->in_reconfig) {
2651                 local->in_reconfig = false;
2652                 barrier();
2653
2654                 /* Restart deferred ROCs */
2655                 mutex_lock(&local->mtx);
2656                 ieee80211_start_next_roc(local);
2657                 mutex_unlock(&local->mtx);
2658
2659                 /* Requeue all works */
2660                 list_for_each_entry(sdata, &local->interfaces, list)
2661                         ieee80211_queue_work(&local->hw, &sdata->work);
2662         }
2663
2664         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2665                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2666                                         false);
2667
2668         /*
2669          * If this is for hw restart things are still running.
2670          * We may want to change that later, however.
2671          */
2672         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2673                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2674
2675         if (!suspended)
2676                 return 0;
2677
2678 #ifdef CONFIG_PM
2679         /* first set suspended false, then resuming */
2680         local->suspended = false;
2681         mb();
2682         local->resuming = false;
2683
2684         ieee80211_flush_completed_scan(local, false);
2685
2686         if (local->open_count && !reconfig_due_to_wowlan)
2687                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2688
2689         list_for_each_entry(sdata, &local->interfaces, list) {
2690                 if (!ieee80211_sdata_running(sdata))
2691                         continue;
2692                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2693                         ieee80211_sta_restart(sdata);
2694         }
2695
2696         mod_timer(&local->sta_cleanup, jiffies + 1);
2697 #else
2698         WARN_ON(1);
2699 #endif
2700
2701         return 0;
2702 }
2703
2704 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2705 {
2706         struct ieee80211_sub_if_data *sdata;
2707         struct ieee80211_local *local;
2708         struct ieee80211_key *key;
2709
2710         if (WARN_ON(!vif))
2711                 return;
2712
2713         sdata = vif_to_sdata(vif);
2714         local = sdata->local;
2715
2716         if (WARN_ON(!local->resuming))
2717                 return;
2718
2719         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2720                 return;
2721
2722         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2723
2724         mutex_lock(&local->key_mtx);
2725         list_for_each_entry(key, &sdata->key_list, list)
2726                 key->flags |= KEY_FLAG_TAINTED;
2727         mutex_unlock(&local->key_mtx);
2728 }
2729 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2730
2731 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2732 {
2733         struct ieee80211_local *local = sdata->local;
2734         struct ieee80211_chanctx_conf *chanctx_conf;
2735         struct ieee80211_chanctx *chanctx;
2736
2737         mutex_lock(&local->chanctx_mtx);
2738
2739         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2740                                         lockdep_is_held(&local->chanctx_mtx));
2741
2742         /*
2743          * This function can be called from a work, thus it may be possible
2744          * that the chanctx_conf is removed (due to a disconnection, for
2745          * example).
2746          * So nothing should be done in such case.
2747          */
2748         if (!chanctx_conf)
2749                 goto unlock;
2750
2751         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2752         ieee80211_recalc_smps_chanctx(local, chanctx);
2753  unlock:
2754         mutex_unlock(&local->chanctx_mtx);
2755 }
2756
2757 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2758 {
2759         struct ieee80211_local *local = sdata->local;
2760         struct ieee80211_chanctx_conf *chanctx_conf;
2761         struct ieee80211_chanctx *chanctx;
2762
2763         mutex_lock(&local->chanctx_mtx);
2764
2765         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2766                                         lockdep_is_held(&local->chanctx_mtx));
2767
2768         if (WARN_ON_ONCE(!chanctx_conf))
2769                 goto unlock;
2770
2771         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2772         ieee80211_recalc_chanctx_min_def(local, chanctx);
2773  unlock:
2774         mutex_unlock(&local->chanctx_mtx);
2775 }
2776
2777 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2778 {
2779         size_t pos = offset;
2780
2781         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2782                 pos += 2 + ies[pos + 1];
2783
2784         return pos;
2785 }
2786
2787 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2788                                             int rssi_min_thold,
2789                                             int rssi_max_thold)
2790 {
2791         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2792
2793         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2794                 return;
2795
2796         /*
2797          * Scale up threshold values before storing it, as the RSSI averaging
2798          * algorithm uses a scaled up value as well. Change this scaling
2799          * factor if the RSSI averaging algorithm changes.
2800          */
2801         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2802         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2803 }
2804
2805 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2806                                     int rssi_min_thold,
2807                                     int rssi_max_thold)
2808 {
2809         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2810
2811         WARN_ON(rssi_min_thold == rssi_max_thold ||
2812                 rssi_min_thold > rssi_max_thold);
2813
2814         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2815                                        rssi_max_thold);
2816 }
2817 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2818
2819 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2820 {
2821         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2822
2823         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2824 }
2825 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2826
2827 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2828                               u16 cap)
2829 {
2830         __le16 tmp;
2831
2832         *pos++ = WLAN_EID_HT_CAPABILITY;
2833         *pos++ = sizeof(struct ieee80211_ht_cap);
2834         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2835
2836         /* capability flags */
2837         tmp = cpu_to_le16(cap);
2838         memcpy(pos, &tmp, sizeof(u16));
2839         pos += sizeof(u16);
2840
2841         /* AMPDU parameters */
2842         *pos++ = ht_cap->ampdu_factor |
2843                  (ht_cap->ampdu_density <<
2844                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2845
2846         /* MCS set */
2847         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2848         pos += sizeof(ht_cap->mcs);
2849
2850         /* extended capabilities */
2851         pos += sizeof(__le16);
2852
2853         /* BF capabilities */
2854         pos += sizeof(__le32);
2855
2856         /* antenna selection */
2857         pos += sizeof(u8);
2858
2859         return pos;
2860 }
2861
2862 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2863                                u32 cap)
2864 {
2865         __le32 tmp;
2866
2867         *pos++ = WLAN_EID_VHT_CAPABILITY;
2868         *pos++ = sizeof(struct ieee80211_vht_cap);
2869         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2870
2871         /* capability flags */
2872         tmp = cpu_to_le32(cap);
2873         memcpy(pos, &tmp, sizeof(u32));
2874         pos += sizeof(u32);
2875
2876         /* VHT MCS set */
2877         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2878         pos += sizeof(vht_cap->vht_mcs);
2879
2880         return pos;
2881 }
2882
2883 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2884 {
2885         const struct ieee80211_sta_he_cap *he_cap;
2886         struct ieee80211_supported_band *sband;
2887         u8 n;
2888
2889         sband = ieee80211_get_sband(sdata);
2890         if (!sband)
2891                 return 0;
2892
2893         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2894         if (!he_cap)
2895                 return 0;
2896
2897         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2898         return 2 + 1 +
2899                sizeof(he_cap->he_cap_elem) + n +
2900                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2901                                      he_cap->he_cap_elem.phy_cap_info);
2902 }
2903
2904 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2905                               const struct ieee80211_sta_he_cap *he_cap,
2906                               u8 *end)
2907 {
2908         struct ieee80211_he_cap_elem elem;
2909         u8 n;
2910         u8 ie_len;
2911         u8 *orig_pos = pos;
2912
2913         /* Make sure we have place for the IE */
2914         /*
2915          * TODO: the 1 added is because this temporarily is under the EXTENSION
2916          * IE. Get rid of it when it moves.
2917          */
2918         if (!he_cap)
2919                 return orig_pos;
2920
2921         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2922         elem = he_cap->he_cap_elem;
2923
2924         if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
2925                 elem.phy_cap_info[0] &=
2926                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2927                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2928
2929         if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
2930                 elem.phy_cap_info[0] &=
2931                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
2932
2933         if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
2934                 elem.phy_cap_info[0] &=
2935                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
2936
2937         n = ieee80211_he_mcs_nss_size(&elem);
2938         ie_len = 2 + 1 +
2939                  sizeof(he_cap->he_cap_elem) + n +
2940                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2941                                        he_cap->he_cap_elem.phy_cap_info);
2942
2943         if ((end - pos) < ie_len)
2944                 return orig_pos;
2945
2946         *pos++ = WLAN_EID_EXTENSION;
2947         pos++; /* We'll set the size later below */
2948         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2949
2950         /* Fixed data */
2951         memcpy(pos, &elem, sizeof(elem));
2952         pos += sizeof(elem);
2953
2954         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2955         pos += n;
2956
2957         /* Check if PPE Threshold should be present */
2958         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2959              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2960                 goto end;
2961
2962         /*
2963          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2964          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2965          */
2966         n = hweight8(he_cap->ppe_thres[0] &
2967                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2968         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2969                    IEEE80211_PPE_THRES_NSS_POS));
2970
2971         /*
2972          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2973          * total size.
2974          */
2975         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2976         n = DIV_ROUND_UP(n, 8);
2977
2978         /* Copy PPE Thresholds */
2979         memcpy(pos, &he_cap->ppe_thres, n);
2980         pos += n;
2981
2982 end:
2983         orig_pos[1] = (pos - orig_pos) - 2;
2984         return pos;
2985 }
2986
2987 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2988                                     struct sk_buff *skb)
2989 {
2990         struct ieee80211_supported_band *sband;
2991         const struct ieee80211_sband_iftype_data *iftd;
2992         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2993         u8 *pos;
2994         u16 cap;
2995
2996         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2997                                           BIT(NL80211_BAND_6GHZ),
2998                                           IEEE80211_CHAN_NO_HE))
2999                 return;
3000
3001         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3002
3003         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3004         if (!iftd)
3005                 return;
3006
3007         /* Check for device HE 6 GHz capability before adding element */
3008         if (!iftd->he_6ghz_capa.capa)
3009                 return;
3010
3011         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3012         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3013
3014         switch (sdata->smps_mode) {
3015         case IEEE80211_SMPS_AUTOMATIC:
3016         case IEEE80211_SMPS_NUM_MODES:
3017                 WARN_ON(1);
3018                 fallthrough;
3019         case IEEE80211_SMPS_OFF:
3020                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3021                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3022                 break;
3023         case IEEE80211_SMPS_STATIC:
3024                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3025                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3026                 break;
3027         case IEEE80211_SMPS_DYNAMIC:
3028                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3029                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3030                 break;
3031         }
3032
3033         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3034         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3035                                     pos + 2 + 1 + sizeof(cap));
3036 }
3037
3038 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3039                                const struct cfg80211_chan_def *chandef,
3040                                u16 prot_mode, bool rifs_mode)
3041 {
3042         struct ieee80211_ht_operation *ht_oper;
3043         /* Build HT Information */
3044         *pos++ = WLAN_EID_HT_OPERATION;
3045         *pos++ = sizeof(struct ieee80211_ht_operation);
3046         ht_oper = (struct ieee80211_ht_operation *)pos;
3047         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3048                                         chandef->chan->center_freq);
3049         switch (chandef->width) {
3050         case NL80211_CHAN_WIDTH_160:
3051         case NL80211_CHAN_WIDTH_80P80:
3052         case NL80211_CHAN_WIDTH_80:
3053         case NL80211_CHAN_WIDTH_40:
3054                 if (chandef->center_freq1 > chandef->chan->center_freq)
3055                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3056                 else
3057                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3058                 break;
3059         default:
3060                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3061                 break;
3062         }
3063         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3064             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3065             chandef->width != NL80211_CHAN_WIDTH_20)
3066                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3067
3068         if (rifs_mode)
3069                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3070
3071         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3072         ht_oper->stbc_param = 0x0000;
3073
3074         /* It seems that Basic MCS set and Supported MCS set
3075            are identical for the first 10 bytes */
3076         memset(&ht_oper->basic_set, 0, 16);
3077         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3078
3079         return pos + sizeof(struct ieee80211_ht_operation);
3080 }
3081
3082 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3083                                    const struct cfg80211_chan_def *chandef)
3084 {
3085         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3086         *pos++ = 3;                                     /* IE length */
3087         /* New channel width */
3088         switch (chandef->width) {
3089         case NL80211_CHAN_WIDTH_80:
3090                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3091                 break;
3092         case NL80211_CHAN_WIDTH_160:
3093                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3094                 break;
3095         case NL80211_CHAN_WIDTH_80P80:
3096                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3097                 break;
3098         default:
3099                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3100         }
3101
3102         /* new center frequency segment 0 */
3103         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3104         /* new center frequency segment 1 */
3105         if (chandef->center_freq2)
3106                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3107         else
3108                 *pos++ = 0;
3109 }
3110
3111 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3112                                 const struct cfg80211_chan_def *chandef)
3113 {
3114         struct ieee80211_vht_operation *vht_oper;
3115
3116         *pos++ = WLAN_EID_VHT_OPERATION;
3117         *pos++ = sizeof(struct ieee80211_vht_operation);
3118         vht_oper = (struct ieee80211_vht_operation *)pos;
3119         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3120                                                         chandef->center_freq1);
3121         if (chandef->center_freq2)
3122                 vht_oper->center_freq_seg1_idx =
3123                         ieee80211_frequency_to_channel(chandef->center_freq2);
3124         else
3125                 vht_oper->center_freq_seg1_idx = 0x00;
3126
3127         switch (chandef->width) {
3128         case NL80211_CHAN_WIDTH_160:
3129                 /*
3130                  * Convert 160 MHz channel width to new style as interop
3131                  * workaround.
3132                  */
3133                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3134                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3135                 if (chandef->chan->center_freq < chandef->center_freq1)
3136                         vht_oper->center_freq_seg0_idx -= 8;
3137                 else
3138                         vht_oper->center_freq_seg0_idx += 8;
3139                 break;
3140         case NL80211_CHAN_WIDTH_80P80:
3141                 /*
3142                  * Convert 80+80 MHz channel width to new style as interop
3143                  * workaround.
3144                  */
3145                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3146                 break;
3147         case NL80211_CHAN_WIDTH_80:
3148                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3149                 break;
3150         default:
3151                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3152                 break;
3153         }
3154
3155         /* don't require special VHT peer rates */
3156         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3157
3158         return pos + sizeof(struct ieee80211_vht_operation);
3159 }
3160
3161 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3162 {
3163         struct ieee80211_he_operation *he_oper;
3164         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3165         u32 he_oper_params;
3166         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3167
3168         if (chandef->chan->band == NL80211_BAND_6GHZ)
3169                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3170
3171         *pos++ = WLAN_EID_EXTENSION;
3172         *pos++ = ie_len;
3173         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3174
3175         he_oper_params = 0;
3176         he_oper_params |= u32_encode_bits(1023, /* disabled */
3177                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3178         he_oper_params |= u32_encode_bits(1,
3179                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3180         he_oper_params |= u32_encode_bits(1,
3181                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3182         if (chandef->chan->band == NL80211_BAND_6GHZ)
3183                 he_oper_params |= u32_encode_bits(1,
3184                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3185
3186         he_oper = (struct ieee80211_he_operation *)pos;
3187         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3188
3189         /* don't require special HE peer rates */
3190         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3191         pos += sizeof(struct ieee80211_he_operation);
3192
3193         if (chandef->chan->band != NL80211_BAND_6GHZ)
3194                 goto out;
3195
3196         /* TODO add VHT operational */
3197         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3198         he_6ghz_op->minrate = 6; /* 6 Mbps */
3199         he_6ghz_op->primary =
3200                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3201         he_6ghz_op->ccfs0 =
3202                 ieee80211_frequency_to_channel(chandef->center_freq1);
3203         if (chandef->center_freq2)
3204                 he_6ghz_op->ccfs1 =
3205                         ieee80211_frequency_to_channel(chandef->center_freq2);
3206         else
3207                 he_6ghz_op->ccfs1 = 0;
3208
3209         switch (chandef->width) {
3210         case NL80211_CHAN_WIDTH_160:
3211                 /* Convert 160 MHz channel width to new style as interop
3212                  * workaround.
3213                  */
3214                 he_6ghz_op->control =
3215                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3216                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3217                 if (chandef->chan->center_freq < chandef->center_freq1)
3218                         he_6ghz_op->ccfs0 -= 8;
3219                 else
3220                         he_6ghz_op->ccfs0 += 8;
3221                 fallthrough;
3222         case NL80211_CHAN_WIDTH_80P80:
3223                 he_6ghz_op->control =
3224                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3225                 break;
3226         case NL80211_CHAN_WIDTH_80:
3227                 he_6ghz_op->control =
3228                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3229                 break;
3230         case NL80211_CHAN_WIDTH_40:
3231                 he_6ghz_op->control =
3232                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3233                 break;
3234         default:
3235                 he_6ghz_op->control =
3236                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3237                 break;
3238         }
3239
3240         pos += sizeof(struct ieee80211_he_6ghz_oper);
3241
3242 out:
3243         return pos;
3244 }
3245
3246 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3247                                struct cfg80211_chan_def *chandef)
3248 {
3249         enum nl80211_channel_type channel_type;
3250
3251         if (!ht_oper)
3252                 return false;
3253
3254         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3255         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3256                 channel_type = NL80211_CHAN_HT20;
3257                 break;
3258         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3259                 channel_type = NL80211_CHAN_HT40PLUS;
3260                 break;
3261         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3262                 channel_type = NL80211_CHAN_HT40MINUS;
3263                 break;
3264         default:
3265                 channel_type = NL80211_CHAN_NO_HT;
3266                 return false;
3267         }
3268
3269         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3270         return true;
3271 }
3272
3273 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3274                                 const struct ieee80211_vht_operation *oper,
3275                                 const struct ieee80211_ht_operation *htop,
3276                                 struct cfg80211_chan_def *chandef)
3277 {
3278         struct cfg80211_chan_def new = *chandef;
3279         int cf0, cf1;
3280         int ccfs0, ccfs1, ccfs2;
3281         int ccf0, ccf1;
3282         u32 vht_cap;
3283         bool support_80_80 = false;
3284         bool support_160 = false;
3285         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3286                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3287         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3288                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3289
3290         if (!oper || !htop)
3291                 return false;
3292
3293         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3294         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3295                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3296         support_80_80 = ((vht_cap &
3297                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3298                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3299                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3300                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3301                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3302         ccfs0 = oper->center_freq_seg0_idx;
3303         ccfs1 = oper->center_freq_seg1_idx;
3304         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3305                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3306                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3307
3308         ccf0 = ccfs0;
3309
3310         /* if not supported, parse as though we didn't understand it */
3311         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3312                 ext_nss_bw_supp = 0;
3313
3314         /*
3315          * Cf. IEEE 802.11 Table 9-250
3316          *
3317          * We really just consider that because it's inefficient to connect
3318          * at a higher bandwidth than we'll actually be able to use.
3319          */
3320         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3321         default:
3322         case 0x00:
3323                 ccf1 = 0;
3324                 support_160 = false;
3325                 support_80_80 = false;
3326                 break;
3327         case 0x01:
3328                 support_80_80 = false;
3329                 fallthrough;
3330         case 0x02:
3331         case 0x03:
3332                 ccf1 = ccfs2;
3333                 break;
3334         case 0x10:
3335                 ccf1 = ccfs1;
3336                 break;
3337         case 0x11:
3338         case 0x12:
3339                 if (!ccfs1)
3340                         ccf1 = ccfs2;
3341                 else
3342                         ccf1 = ccfs1;
3343                 break;
3344         case 0x13:
3345         case 0x20:
3346         case 0x23:
3347                 ccf1 = ccfs1;
3348                 break;
3349         }
3350
3351         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3352         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3353
3354         switch (oper->chan_width) {
3355         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3356                 /* just use HT information directly */
3357                 break;
3358         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3359                 new.width = NL80211_CHAN_WIDTH_80;
3360                 new.center_freq1 = cf0;
3361                 /* If needed, adjust based on the newer interop workaround. */
3362                 if (ccf1) {
3363                         unsigned int diff;
3364
3365                         diff = abs(ccf1 - ccf0);
3366                         if ((diff == 8) && support_160) {
3367                                 new.width = NL80211_CHAN_WIDTH_160;
3368                                 new.center_freq1 = cf1;
3369                         } else if ((diff > 8) && support_80_80) {
3370                                 new.width = NL80211_CHAN_WIDTH_80P80;
3371                                 new.center_freq2 = cf1;
3372                         }
3373                 }
3374                 break;
3375         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3376                 /* deprecated encoding */
3377                 new.width = NL80211_CHAN_WIDTH_160;
3378                 new.center_freq1 = cf0;
3379                 break;
3380         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3381                 /* deprecated encoding */
3382                 new.width = NL80211_CHAN_WIDTH_80P80;
3383                 new.center_freq1 = cf0;
3384                 new.center_freq2 = cf1;
3385                 break;
3386         default:
3387                 return false;
3388         }
3389
3390         if (!cfg80211_chandef_valid(&new))
3391                 return false;
3392
3393         *chandef = new;
3394         return true;
3395 }
3396
3397 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3398                                     const struct ieee80211_he_operation *he_oper,
3399                                     struct cfg80211_chan_def *chandef)
3400 {
3401         struct ieee80211_local *local = sdata->local;
3402         struct ieee80211_supported_band *sband;
3403         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3404         const struct ieee80211_sta_he_cap *he_cap;
3405         struct cfg80211_chan_def he_chandef = *chandef;
3406         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3407         bool support_80_80, support_160;
3408         u8 he_phy_cap;
3409         u32 freq;
3410
3411         if (chandef->chan->band != NL80211_BAND_6GHZ)
3412                 return true;
3413
3414         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3415
3416         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3417         if (!he_cap) {
3418                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3419                 return false;
3420         }
3421
3422         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3423         support_160 =
3424                 he_phy_cap &
3425                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3426         support_80_80 =
3427                 he_phy_cap &
3428                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3429
3430         if (!he_oper) {
3431                 sdata_info(sdata,
3432                            "HE is not advertised on (on %d MHz), expect issues\n",
3433                            chandef->chan->center_freq);
3434                 return false;
3435         }
3436
3437         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3438
3439         if (!he_6ghz_oper) {
3440                 sdata_info(sdata,
3441                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3442                            chandef->chan->center_freq);
3443                 return false;
3444         }
3445
3446         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3447                                               NL80211_BAND_6GHZ);
3448         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3449
3450         switch (u8_get_bits(he_6ghz_oper->control,
3451                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3452         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3453                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3454                 break;
3455         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3456                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3457                 break;
3458         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3459                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3460                 break;
3461         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3462                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3463                 if (!he_6ghz_oper->ccfs1)
3464                         break;
3465                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3466                         if (support_160)
3467                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3468                 } else {
3469                         if (support_80_80)
3470                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3471                 }
3472                 break;
3473         }
3474
3475         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3476                 he_chandef.center_freq1 =
3477                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3478                                                        NL80211_BAND_6GHZ);
3479         } else {
3480                 he_chandef.center_freq1 =
3481                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3482                                                        NL80211_BAND_6GHZ);
3483                 if (support_80_80 || support_160)
3484                         he_chandef.center_freq2 =
3485                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3486                                                                NL80211_BAND_6GHZ);
3487         }
3488
3489         if (!cfg80211_chandef_valid(&he_chandef)) {
3490                 sdata_info(sdata,
3491                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3492                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3493                            he_chandef.width,
3494                            he_chandef.center_freq1,
3495                            he_chandef.center_freq2);
3496                 return false;
3497         }
3498
3499         *chandef = he_chandef;
3500
3501         return true;
3502 }
3503
3504 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3505                                 struct cfg80211_chan_def *chandef)
3506 {
3507         u32 oper_freq;
3508
3509         if (!oper)
3510                 return false;
3511
3512         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3513         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3514                 chandef->width = NL80211_CHAN_WIDTH_1;
3515                 break;
3516         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3517                 chandef->width = NL80211_CHAN_WIDTH_2;
3518                 break;
3519         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3520                 chandef->width = NL80211_CHAN_WIDTH_4;
3521                 break;
3522         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3523                 chandef->width = NL80211_CHAN_WIDTH_8;
3524                 break;
3525         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3526                 chandef->width = NL80211_CHAN_WIDTH_16;
3527                 break;
3528         default:
3529                 return false;
3530         }
3531
3532         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3533                                                   NL80211_BAND_S1GHZ);
3534         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3535         chandef->freq1_offset = oper_freq % 1000;
3536
3537         return true;
3538 }
3539
3540 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3541                              const struct ieee80211_supported_band *sband,
3542                              const u8 *srates, int srates_len, u32 *rates)
3543 {
3544         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3545         int shift = ieee80211_chandef_get_shift(chandef);
3546         struct ieee80211_rate *br;
3547         int brate, rate, i, j, count = 0;
3548
3549         *rates = 0;
3550
3551         for (i = 0; i < srates_len; i++) {
3552                 rate = srates[i] & 0x7f;
3553
3554                 for (j = 0; j < sband->n_bitrates; j++) {
3555                         br = &sband->bitrates[j];
3556                         if ((rate_flags & br->flags) != rate_flags)
3557                                 continue;
3558
3559                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3560                         if (brate == rate) {
3561                                 *rates |= BIT(j);
3562                                 count++;
3563                                 break;
3564                         }
3565                 }
3566         }
3567         return count;
3568 }
3569
3570 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3571                             struct sk_buff *skb, bool need_basic,
3572                             enum nl80211_band band)
3573 {
3574         struct ieee80211_local *local = sdata->local;
3575         struct ieee80211_supported_band *sband;
3576         int rate, shift;
3577         u8 i, rates, *pos;
3578         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3579         u32 rate_flags;
3580
3581         shift = ieee80211_vif_get_shift(&sdata->vif);
3582         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3583         sband = local->hw.wiphy->bands[band];
3584         rates = 0;
3585         for (i = 0; i < sband->n_bitrates; i++) {
3586                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3587                         continue;
3588                 rates++;
3589         }
3590         if (rates > 8)
3591                 rates = 8;
3592
3593         if (skb_tailroom(skb) < rates + 2)
3594                 return -ENOMEM;
3595
3596         pos = skb_put(skb, rates + 2);
3597         *pos++ = WLAN_EID_SUPP_RATES;
3598         *pos++ = rates;
3599         for (i = 0; i < rates; i++) {
3600                 u8 basic = 0;
3601                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3602                         continue;
3603
3604                 if (need_basic && basic_rates & BIT(i))
3605                         basic = 0x80;
3606                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3607                                     5 * (1 << shift));
3608                 *pos++ = basic | (u8) rate;
3609         }
3610
3611         return 0;
3612 }
3613
3614 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3615                                 struct sk_buff *skb, bool need_basic,
3616                                 enum nl80211_band band)
3617 {
3618         struct ieee80211_local *local = sdata->local;
3619         struct ieee80211_supported_band *sband;
3620         int rate, shift;
3621         u8 i, exrates, *pos;
3622         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3623         u32 rate_flags;
3624
3625         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3626         shift = ieee80211_vif_get_shift(&sdata->vif);
3627
3628         sband = local->hw.wiphy->bands[band];
3629         exrates = 0;
3630         for (i = 0; i < sband->n_bitrates; i++) {
3631                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3632                         continue;
3633                 exrates++;
3634         }
3635
3636         if (exrates > 8)
3637                 exrates -= 8;
3638         else
3639                 exrates = 0;
3640
3641         if (skb_tailroom(skb) < exrates + 2)
3642                 return -ENOMEM;
3643
3644         if (exrates) {
3645                 pos = skb_put(skb, exrates + 2);
3646                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3647                 *pos++ = exrates;
3648                 for (i = 8; i < sband->n_bitrates; i++) {
3649                         u8 basic = 0;
3650                         if ((rate_flags & sband->bitrates[i].flags)
3651                             != rate_flags)
3652                                 continue;
3653                         if (need_basic && basic_rates & BIT(i))
3654                                 basic = 0x80;
3655                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3656                                             5 * (1 << shift));
3657                         *pos++ = basic | (u8) rate;
3658                 }
3659         }
3660         return 0;
3661 }
3662
3663 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3664 {
3665         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3666         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3667
3668         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3669                 /* non-managed type inferfaces */
3670                 return 0;
3671         }
3672         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3673 }
3674 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3675
3676 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3677 {
3678         if (!mcs)
3679                 return 1;
3680
3681         /* TODO: consider rx_highest */
3682
3683         if (mcs->rx_mask[3])
3684                 return 4;
3685         if (mcs->rx_mask[2])
3686                 return 3;
3687         if (mcs->rx_mask[1])
3688                 return 2;
3689         return 1;
3690 }
3691
3692 /**
3693  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3694  * @local: mac80211 hw info struct
3695  * @status: RX status
3696  * @mpdu_len: total MPDU length (including FCS)
3697  * @mpdu_offset: offset into MPDU to calculate timestamp at
3698  *
3699  * This function calculates the RX timestamp at the given MPDU offset, taking
3700  * into account what the RX timestamp was. An offset of 0 will just normalize
3701  * the timestamp to TSF at beginning of MPDU reception.
3702  */
3703 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3704                                      struct ieee80211_rx_status *status,
3705                                      unsigned int mpdu_len,
3706                                      unsigned int mpdu_offset)
3707 {
3708         u64 ts = status->mactime;
3709         struct rate_info ri;
3710         u16 rate;
3711         u8 n_ltf;
3712
3713         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3714                 return 0;
3715
3716         memset(&ri, 0, sizeof(ri));
3717
3718         ri.bw = status->bw;
3719
3720         /* Fill cfg80211 rate info */
3721         switch (status->encoding) {
3722         case RX_ENC_HE:
3723                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3724                 ri.mcs = status->rate_idx;
3725                 ri.nss = status->nss;
3726                 ri.he_ru_alloc = status->he_ru;
3727                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3728                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3729
3730                 /*
3731                  * See P802.11ax_D6.0, section 27.3.4 for
3732                  * VHT PPDU format.
3733                  */
3734                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3735                         mpdu_offset += 2;
3736                         ts += 36;
3737
3738                         /*
3739                          * TODO:
3740                          * For HE MU PPDU, add the HE-SIG-B.
3741                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3742                          * For HE TB PPDU, add 4us for the HE-STF.
3743                          * Add the HE-LTF durations - variable.
3744                          */
3745                 }
3746
3747                 break;
3748         case RX_ENC_HT:
3749                 ri.mcs = status->rate_idx;
3750                 ri.flags |= RATE_INFO_FLAGS_MCS;
3751                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3752                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3753
3754                 /*
3755                  * See P802.11REVmd_D3.0, section 19.3.2 for
3756                  * HT PPDU format.
3757                  */
3758                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3759                         mpdu_offset += 2;
3760                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3761                                 ts += 24;
3762                         else
3763                                 ts += 32;
3764
3765                         /*
3766                          * Add Data HT-LTFs per streams
3767                          * TODO: add Extension HT-LTFs, 4us per LTF
3768                          */
3769                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3770                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3771                         ts += n_ltf * 4;
3772                 }
3773
3774                 break;
3775         case RX_ENC_VHT:
3776                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3777                 ri.mcs = status->rate_idx;
3778                 ri.nss = status->nss;
3779                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3780                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3781
3782                 /*
3783                  * See P802.11REVmd_D3.0, section 21.3.2 for
3784                  * VHT PPDU format.
3785                  */
3786                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3787                         mpdu_offset += 2;
3788                         ts += 36;
3789
3790                         /*
3791                          * Add VHT-LTFs per streams
3792                          */
3793                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3794                                 ri.nss + 1 : ri.nss;
3795                         ts += 4 * n_ltf;
3796                 }
3797
3798                 break;
3799         default:
3800                 WARN_ON(1);
3801                 fallthrough;
3802         case RX_ENC_LEGACY: {
3803                 struct ieee80211_supported_band *sband;
3804                 int shift = 0;
3805                 int bitrate;
3806
3807                 switch (status->bw) {
3808                 case RATE_INFO_BW_10:
3809                         shift = 1;
3810                         break;
3811                 case RATE_INFO_BW_5:
3812                         shift = 2;
3813                         break;
3814                 }
3815
3816                 sband = local->hw.wiphy->bands[status->band];
3817                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3818                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3819
3820                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3821                         if (status->band == NL80211_BAND_5GHZ) {
3822                                 ts += 20 << shift;
3823                                 mpdu_offset += 2;
3824                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3825                                 ts += 96;
3826                         } else {
3827                                 ts += 192;
3828                         }
3829                 }
3830                 break;
3831                 }
3832         }
3833
3834         rate = cfg80211_calculate_bitrate(&ri);
3835         if (WARN_ONCE(!rate,
3836                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3837                       (unsigned long long)status->flag, status->rate_idx,
3838                       status->nss))
3839                 return 0;
3840
3841         /* rewind from end of MPDU */
3842         if (status->flag & RX_FLAG_MACTIME_END)
3843                 ts -= mpdu_len * 8 * 10 / rate;
3844
3845         ts += mpdu_offset * 8 * 10 / rate;
3846
3847         return ts;
3848 }
3849
3850 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3851 {
3852         struct ieee80211_sub_if_data *sdata;
3853         struct cfg80211_chan_def chandef;
3854
3855         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3856         lockdep_assert_wiphy(local->hw.wiphy);
3857
3858         mutex_lock(&local->mtx);
3859         list_for_each_entry(sdata, &local->interfaces, list) {
3860                 /* it might be waiting for the local->mtx, but then
3861                  * by the time it gets it, sdata->wdev.cac_started
3862                  * will no longer be true
3863                  */
3864                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3865
3866                 if (sdata->wdev.cac_started) {
3867                         chandef = sdata->vif.bss_conf.chandef;
3868                         ieee80211_vif_release_channel(sdata);
3869                         cfg80211_cac_event(sdata->dev,
3870                                            &chandef,
3871                                            NL80211_RADAR_CAC_ABORTED,
3872                                            GFP_KERNEL);
3873                 }
3874         }
3875         mutex_unlock(&local->mtx);
3876 }
3877
3878 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3879 {
3880         struct ieee80211_local *local =
3881                 container_of(work, struct ieee80211_local, radar_detected_work);
3882         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3883         struct ieee80211_chanctx *ctx;
3884         int num_chanctx = 0;
3885
3886         mutex_lock(&local->chanctx_mtx);
3887         list_for_each_entry(ctx, &local->chanctx_list, list) {
3888                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3889                         continue;
3890
3891                 num_chanctx++;
3892                 chandef = ctx->conf.def;
3893         }
3894         mutex_unlock(&local->chanctx_mtx);
3895
3896         wiphy_lock(local->hw.wiphy);
3897         ieee80211_dfs_cac_cancel(local);
3898         wiphy_unlock(local->hw.wiphy);
3899
3900         if (num_chanctx > 1)
3901                 /* XXX: multi-channel is not supported yet */
3902                 WARN_ON(1);
3903         else
3904                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3905 }
3906
3907 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3908 {
3909         struct ieee80211_local *local = hw_to_local(hw);
3910
3911         trace_api_radar_detected(local);
3912
3913         schedule_work(&local->radar_detected_work);
3914 }
3915 EXPORT_SYMBOL(ieee80211_radar_detected);
3916
3917 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3918 {
3919         u32 ret;
3920         int tmp;
3921
3922         switch (c->width) {
3923         case NL80211_CHAN_WIDTH_20:
3924                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3925                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3926                 break;
3927         case NL80211_CHAN_WIDTH_40:
3928                 c->width = NL80211_CHAN_WIDTH_20;
3929                 c->center_freq1 = c->chan->center_freq;
3930                 ret = IEEE80211_STA_DISABLE_40MHZ |
3931                       IEEE80211_STA_DISABLE_VHT;
3932                 break;
3933         case NL80211_CHAN_WIDTH_80:
3934                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3935                 /* n_P40 */
3936                 tmp /= 2;
3937                 /* freq_P40 */
3938                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3939                 c->width = NL80211_CHAN_WIDTH_40;
3940                 ret = IEEE80211_STA_DISABLE_VHT;
3941                 break;
3942         case NL80211_CHAN_WIDTH_80P80:
3943                 c->center_freq2 = 0;
3944                 c->width = NL80211_CHAN_WIDTH_80;
3945                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3946                       IEEE80211_STA_DISABLE_160MHZ;
3947                 break;
3948         case NL80211_CHAN_WIDTH_160:
3949                 /* n_P20 */
3950                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3951                 /* n_P80 */
3952                 tmp /= 4;
3953                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3954                 c->width = NL80211_CHAN_WIDTH_80;
3955                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3956                       IEEE80211_STA_DISABLE_160MHZ;
3957                 break;
3958         default:
3959         case NL80211_CHAN_WIDTH_20_NOHT:
3960                 WARN_ON_ONCE(1);
3961                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3962                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3963                 break;
3964         case NL80211_CHAN_WIDTH_1:
3965         case NL80211_CHAN_WIDTH_2:
3966         case NL80211_CHAN_WIDTH_4:
3967         case NL80211_CHAN_WIDTH_8:
3968         case NL80211_CHAN_WIDTH_16:
3969         case NL80211_CHAN_WIDTH_5:
3970         case NL80211_CHAN_WIDTH_10:
3971                 WARN_ON_ONCE(1);
3972                 /* keep c->width */
3973                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3974                 break;
3975         }
3976
3977         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3978
3979         return ret;
3980 }
3981
3982 /*
3983  * Returns true if smps_mode_new is strictly more restrictive than
3984  * smps_mode_old.
3985  */
3986 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3987                                    enum ieee80211_smps_mode smps_mode_new)
3988 {
3989         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3990                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3991                 return false;
3992
3993         switch (smps_mode_old) {
3994         case IEEE80211_SMPS_STATIC:
3995                 return false;
3996         case IEEE80211_SMPS_DYNAMIC:
3997                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3998         case IEEE80211_SMPS_OFF:
3999                 return smps_mode_new != IEEE80211_SMPS_OFF;
4000         default:
4001                 WARN_ON(1);
4002         }
4003
4004         return false;
4005 }
4006
4007 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4008                               struct cfg80211_csa_settings *csa_settings)
4009 {
4010         struct sk_buff *skb;
4011         struct ieee80211_mgmt *mgmt;
4012         struct ieee80211_local *local = sdata->local;
4013         int freq;
4014         int hdr_len = offsetofend(struct ieee80211_mgmt,
4015                                   u.action.u.chan_switch);
4016         u8 *pos;
4017
4018         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4019             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4020                 return -EOPNOTSUPP;
4021
4022         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4023                             5 + /* channel switch announcement element */
4024                             3 + /* secondary channel offset element */
4025                             5 + /* wide bandwidth channel switch announcement */
4026                             8); /* mesh channel switch parameters element */
4027         if (!skb)
4028                 return -ENOMEM;
4029
4030         skb_reserve(skb, local->tx_headroom);
4031         mgmt = skb_put_zero(skb, hdr_len);
4032         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4033                                           IEEE80211_STYPE_ACTION);
4034
4035         eth_broadcast_addr(mgmt->da);
4036         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4037         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4038                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4039         } else {
4040                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4041                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4042         }
4043         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4044         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4045         pos = skb_put(skb, 5);
4046         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4047         *pos++ = 3;                                             /* IE length */
4048         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4049         freq = csa_settings->chandef.chan->center_freq;
4050         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4051         *pos++ = csa_settings->count;                           /* count */
4052
4053         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4054                 enum nl80211_channel_type ch_type;
4055
4056                 skb_put(skb, 3);
4057                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4058                 *pos++ = 1;                                     /* IE length */
4059                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4060                 if (ch_type == NL80211_CHAN_HT40PLUS)
4061                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4062                 else
4063                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4064         }
4065
4066         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4067                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4068
4069                 skb_put(skb, 8);
4070                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4071                 *pos++ = 6;                                     /* IE length */
4072                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4073                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4074                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4075                 *pos++ |= csa_settings->block_tx ?
4076                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4077                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4078                 pos += 2;
4079                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4080                 pos += 2;
4081         }
4082
4083         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4084             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4085             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4086                 skb_put(skb, 5);
4087                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4088         }
4089
4090         ieee80211_tx_skb(sdata, skb);
4091         return 0;
4092 }
4093
4094 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4095 {
4096         return !(cs == NULL || cs->cipher == 0 ||
4097                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4098                  cs->hdr_len <= cs->key_idx_off ||
4099                  cs->key_idx_shift > 7 ||
4100                  cs->key_idx_mask == 0);
4101 }
4102
4103 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4104 {
4105         int i;
4106
4107         /* Ensure we have enough iftype bitmap space for all iftype values */
4108         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4109
4110         for (i = 0; i < n; i++)
4111                 if (!ieee80211_cs_valid(&cs[i]))
4112                         return false;
4113
4114         return true;
4115 }
4116
4117 const struct ieee80211_cipher_scheme *
4118 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4119                  enum nl80211_iftype iftype)
4120 {
4121         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4122         int n = local->hw.n_cipher_schemes;
4123         int i;
4124         const struct ieee80211_cipher_scheme *cs = NULL;
4125
4126         for (i = 0; i < n; i++) {
4127                 if (l[i].cipher == cipher) {
4128                         cs = &l[i];
4129                         break;
4130                 }
4131         }
4132
4133         if (!cs || !(cs->iftype & BIT(iftype)))
4134                 return NULL;
4135
4136         return cs;
4137 }
4138
4139 int ieee80211_cs_headroom(struct ieee80211_local *local,
4140                           struct cfg80211_crypto_settings *crypto,
4141                           enum nl80211_iftype iftype)
4142 {
4143         const struct ieee80211_cipher_scheme *cs;
4144         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4145         int i;
4146
4147         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4148                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4149                                       iftype);
4150
4151                 if (cs && headroom < cs->hdr_len)
4152                         headroom = cs->hdr_len;
4153         }
4154
4155         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4156         if (cs && headroom < cs->hdr_len)
4157                 headroom = cs->hdr_len;
4158
4159         return headroom;
4160 }
4161
4162 static bool
4163 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4164 {
4165         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4166         int skip;
4167
4168         if (end > 0)
4169                 return false;
4170
4171         /* One shot NOA  */
4172         if (data->count[i] == 1)
4173                 return false;
4174
4175         if (data->desc[i].interval == 0)
4176                 return false;
4177
4178         /* End time is in the past, check for repetitions */
4179         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4180         if (data->count[i] < 255) {
4181                 if (data->count[i] <= skip) {
4182                         data->count[i] = 0;
4183                         return false;
4184                 }
4185
4186                 data->count[i] -= skip;
4187         }
4188
4189         data->desc[i].start += skip * data->desc[i].interval;
4190
4191         return true;
4192 }
4193
4194 static bool
4195 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4196                              s32 *offset)
4197 {
4198         bool ret = false;
4199         int i;
4200
4201         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4202                 s32 cur;
4203
4204                 if (!data->count[i])
4205                         continue;
4206
4207                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4208                         ret = true;
4209
4210                 cur = data->desc[i].start - tsf;
4211                 if (cur > *offset)
4212                         continue;
4213
4214                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4215                 if (cur > *offset)
4216                         *offset = cur;
4217         }
4218
4219         return ret;
4220 }
4221
4222 static u32
4223 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4224 {
4225         s32 offset = 0;
4226         int tries = 0;
4227         /*
4228          * arbitrary limit, used to avoid infinite loops when combined NoA
4229          * descriptors cover the full time period.
4230          */
4231         int max_tries = 5;
4232
4233         ieee80211_extend_absent_time(data, tsf, &offset);
4234         do {
4235                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4236                         break;
4237
4238                 tries++;
4239         } while (tries < max_tries);
4240
4241         return offset;
4242 }
4243
4244 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4245 {
4246         u32 next_offset = BIT(31) - 1;
4247         int i;
4248
4249         data->absent = 0;
4250         data->has_next_tsf = false;
4251         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4252                 s32 start;
4253
4254                 if (!data->count[i])
4255                         continue;
4256
4257                 ieee80211_extend_noa_desc(data, tsf, i);
4258                 start = data->desc[i].start - tsf;
4259                 if (start <= 0)
4260                         data->absent |= BIT(i);
4261
4262                 if (next_offset > start)
4263                         next_offset = start;
4264
4265                 data->has_next_tsf = true;
4266         }
4267
4268         if (data->absent)
4269                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4270
4271         data->next_tsf = tsf + next_offset;
4272 }
4273 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4274
4275 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4276                             struct ieee80211_noa_data *data, u32 tsf)
4277 {
4278         int ret = 0;
4279         int i;
4280
4281         memset(data, 0, sizeof(*data));
4282
4283         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4284                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4285
4286                 if (!desc->count || !desc->duration)
4287                         continue;
4288
4289                 data->count[i] = desc->count;
4290                 data->desc[i].start = le32_to_cpu(desc->start_time);
4291                 data->desc[i].duration = le32_to_cpu(desc->duration);
4292                 data->desc[i].interval = le32_to_cpu(desc->interval);
4293
4294                 if (data->count[i] > 1 &&
4295                     data->desc[i].interval < data->desc[i].duration)
4296                         continue;
4297
4298                 ieee80211_extend_noa_desc(data, tsf, i);
4299                 ret++;
4300         }
4301
4302         if (ret)
4303                 ieee80211_update_p2p_noa(data, tsf);
4304
4305         return ret;
4306 }
4307 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4308
4309 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4310                            struct ieee80211_sub_if_data *sdata)
4311 {
4312         u64 tsf = drv_get_tsf(local, sdata);
4313         u64 dtim_count = 0;
4314         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4315         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4316         struct ps_data *ps;
4317         u8 bcns_from_dtim;
4318
4319         if (tsf == -1ULL || !beacon_int || !dtim_period)
4320                 return;
4321
4322         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4323             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4324                 if (!sdata->bss)
4325                         return;
4326
4327                 ps = &sdata->bss->ps;
4328         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4329                 ps = &sdata->u.mesh.ps;
4330         } else {
4331                 return;
4332         }
4333
4334         /*
4335          * actually finds last dtim_count, mac80211 will update in
4336          * __beacon_add_tim().
4337          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4338          */
4339         do_div(tsf, beacon_int);
4340         bcns_from_dtim = do_div(tsf, dtim_period);
4341         /* just had a DTIM */
4342         if (!bcns_from_dtim)
4343                 dtim_count = 0;
4344         else
4345                 dtim_count = dtim_period - bcns_from_dtim;
4346
4347         ps->dtim_count = dtim_count;
4348 }
4349
4350 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4351                                          struct ieee80211_chanctx *ctx)
4352 {
4353         struct ieee80211_sub_if_data *sdata;
4354         u8 radar_detect = 0;
4355
4356         lockdep_assert_held(&local->chanctx_mtx);
4357
4358         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4359                 return 0;
4360
4361         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4362                 if (sdata->reserved_radar_required)
4363                         radar_detect |= BIT(sdata->reserved_chandef.width);
4364
4365         /*
4366          * An in-place reservation context should not have any assigned vifs
4367          * until it replaces the other context.
4368          */
4369         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4370                 !list_empty(&ctx->assigned_vifs));
4371
4372         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4373                 if (sdata->radar_required)
4374                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4375
4376         return radar_detect;
4377 }
4378
4379 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4380                                  const struct cfg80211_chan_def *chandef,
4381                                  enum ieee80211_chanctx_mode chanmode,
4382                                  u8 radar_detect)
4383 {
4384         struct ieee80211_local *local = sdata->local;
4385         struct ieee80211_sub_if_data *sdata_iter;
4386         enum nl80211_iftype iftype = sdata->wdev.iftype;
4387         struct ieee80211_chanctx *ctx;
4388         int total = 1;
4389         struct iface_combination_params params = {
4390                 .radar_detect = radar_detect,
4391         };
4392
4393         lockdep_assert_held(&local->chanctx_mtx);
4394
4395         if (WARN_ON(hweight32(radar_detect) > 1))
4396                 return -EINVAL;
4397
4398         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4399                     !chandef->chan))
4400                 return -EINVAL;
4401
4402         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4403                 return -EINVAL;
4404
4405         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4406             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4407                 /*
4408                  * always passing this is harmless, since it'll be the
4409                  * same value that cfg80211 finds if it finds the same
4410                  * interface ... and that's always allowed
4411                  */
4412                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4413         }
4414
4415         /* Always allow software iftypes */
4416         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4417                 if (radar_detect)
4418                         return -EINVAL;
4419                 return 0;
4420         }
4421
4422         if (chandef)
4423                 params.num_different_channels = 1;
4424
4425         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4426                 params.iftype_num[iftype] = 1;
4427
4428         list_for_each_entry(ctx, &local->chanctx_list, list) {
4429                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4430                         continue;
4431                 params.radar_detect |=
4432                         ieee80211_chanctx_radar_detect(local, ctx);
4433                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4434                         params.num_different_channels++;
4435                         continue;
4436                 }
4437                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4438                     cfg80211_chandef_compatible(chandef,
4439                                                 &ctx->conf.def))
4440                         continue;
4441                 params.num_different_channels++;
4442         }
4443
4444         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4445                 struct wireless_dev *wdev_iter;
4446
4447                 wdev_iter = &sdata_iter->wdev;
4448
4449                 if (sdata_iter == sdata ||
4450                     !ieee80211_sdata_running(sdata_iter) ||
4451                     cfg80211_iftype_allowed(local->hw.wiphy,
4452                                             wdev_iter->iftype, 0, 1))
4453                         continue;
4454
4455                 params.iftype_num[wdev_iter->iftype]++;
4456                 total++;
4457         }
4458
4459         if (total == 1 && !params.radar_detect)
4460                 return 0;
4461
4462         return cfg80211_check_combinations(local->hw.wiphy, &params);
4463 }
4464
4465 static void
4466 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4467                          void *data)
4468 {
4469         u32 *max_num_different_channels = data;
4470
4471         *max_num_different_channels = max(*max_num_different_channels,
4472                                           c->num_different_channels);
4473 }
4474
4475 int ieee80211_max_num_channels(struct ieee80211_local *local)
4476 {
4477         struct ieee80211_sub_if_data *sdata;
4478         struct ieee80211_chanctx *ctx;
4479         u32 max_num_different_channels = 1;
4480         int err;
4481         struct iface_combination_params params = {0};
4482
4483         lockdep_assert_held(&local->chanctx_mtx);
4484
4485         list_for_each_entry(ctx, &local->chanctx_list, list) {
4486                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4487                         continue;
4488
4489                 params.num_different_channels++;
4490
4491                 params.radar_detect |=
4492                         ieee80211_chanctx_radar_detect(local, ctx);
4493         }
4494
4495         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4496                 params.iftype_num[sdata->wdev.iftype]++;
4497
4498         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4499                                          ieee80211_iter_max_chans,
4500                                          &max_num_different_channels);
4501         if (err < 0)
4502                 return err;
4503
4504         return max_num_different_channels;
4505 }
4506
4507 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4508                                 struct ieee80211_sta_s1g_cap *caps,
4509                                 struct sk_buff *skb)
4510 {
4511         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4512         struct ieee80211_s1g_cap s1g_capab;
4513         u8 *pos;
4514         int i;
4515
4516         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4517                 return;
4518
4519         if (!caps->s1g)
4520                 return;
4521
4522         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4523         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4524
4525         /* override the capability info */
4526         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4527                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4528
4529                 s1g_capab.capab_info[i] &= ~mask;
4530                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4531         }
4532
4533         /* then MCS and NSS set */
4534         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4535                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4536
4537                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4538                 s1g_capab.supp_mcs_nss[i] |=
4539                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4540         }
4541
4542         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4543         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4544         *pos++ = sizeof(s1g_capab);
4545
4546         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4547 }
4548
4549 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4550                                   struct sk_buff *skb)
4551 {
4552         u8 *pos = skb_put(skb, 3);
4553
4554         *pos++ = WLAN_EID_AID_REQUEST;
4555         *pos++ = 1;
4556         *pos++ = 0;
4557 }
4558
4559 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4560 {
4561         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4562         *buf++ = 7; /* len */
4563         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4564         *buf++ = 0x50;
4565         *buf++ = 0xf2;
4566         *buf++ = 2; /* WME */
4567         *buf++ = 0; /* WME info */
4568         *buf++ = 1; /* WME ver */
4569         *buf++ = qosinfo; /* U-APSD no in use */
4570
4571         return buf;
4572 }
4573
4574 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4575                              unsigned long *frame_cnt,
4576                              unsigned long *byte_cnt)
4577 {
4578         struct txq_info *txqi = to_txq_info(txq);
4579         u32 frag_cnt = 0, frag_bytes = 0;
4580         struct sk_buff *skb;
4581
4582         skb_queue_walk(&txqi->frags, skb) {
4583                 frag_cnt++;
4584                 frag_bytes += skb->len;
4585         }
4586
4587         if (frame_cnt)
4588                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4589
4590         if (byte_cnt)
4591                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4592 }
4593 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4594
4595 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4596         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4597         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4598         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4599         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4600 };
4601
4602 u16 ieee80211_encode_usf(int listen_interval)
4603 {
4604         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4605         u16 ui, usf = 0;
4606
4607         /* find greatest USF */
4608         while (usf < IEEE80211_MAX_USF) {
4609                 if (listen_interval % listen_int_usf[usf + 1])
4610                         break;
4611                 usf += 1;
4612         }
4613         ui = listen_interval / listen_int_usf[usf];
4614
4615         /* error if there is a remainder. Should've been checked by user */
4616         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4617         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4618                           FIELD_PREP(LISTEN_INT_UI, ui);
4619
4620         return (u16) listen_interval;
4621 }