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                                             const u8 *transmitter_bssid,
1400                                             const 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
1414                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1415                         u8 new_bssid[ETH_ALEN];
1416                         const u8 *index;
1417
1418                         if (sub->id != 0 || sub->datalen < 4) {
1419                                 /* not a valid BSS profile */
1420                                 continue;
1421                         }
1422
1423                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1424                             sub->data[1] != 2) {
1425                                 /* The first element of the
1426                                  * Nontransmitted BSSID Profile is not
1427                                  * the Nontransmitted BSSID Capability
1428                                  * element.
1429                                  */
1430                                 continue;
1431                         }
1432
1433                         memset(nontransmitted_profile, 0, len);
1434                         profile_len = cfg80211_merge_profile(start, len,
1435                                                              elem,
1436                                                              sub,
1437                                                              nontransmitted_profile,
1438                                                              len);
1439
1440                         /* found a Nontransmitted BSSID Profile */
1441                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1442                                                  nontransmitted_profile,
1443                                                  profile_len);
1444                         if (!index || index[1] < 1 || index[2] == 0) {
1445                                 /* Invalid MBSSID Index element */
1446                                 continue;
1447                         }
1448
1449                         cfg80211_gen_new_bssid(transmitter_bssid,
1450                                                elem->data[0],
1451                                                index[2],
1452                                                new_bssid);
1453                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1454                                 found = true;
1455                                 elems->bssid_index_len = index[1];
1456                                 elems->bssid_index = (void *)&index[2];
1457                                 break;
1458                         }
1459                 }
1460         }
1461
1462         return found ? profile_len : 0;
1463 }
1464
1465 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
1466                                                     bool action, u64 filter,
1467                                                     u32 crc,
1468                                                     const u8 *transmitter_bssid,
1469                                                     const u8 *bss_bssid)
1470 {
1471         struct ieee802_11_elems *elems;
1472         const struct element *non_inherit = NULL;
1473         u8 *nontransmitted_profile;
1474         int nontransmitted_profile_len = 0;
1475
1476         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1477         if (!elems)
1478                 return NULL;
1479         elems->ie_start = start;
1480         elems->total_len = len;
1481
1482         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1483         if (nontransmitted_profile) {
1484                 nontransmitted_profile_len =
1485                         ieee802_11_find_bssid_profile(start, len, elems,
1486                                                       transmitter_bssid,
1487                                                       bss_bssid,
1488                                                       nontransmitted_profile);
1489                 non_inherit =
1490                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1491                                                nontransmitted_profile,
1492                                                nontransmitted_profile_len);
1493         }
1494
1495         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1496                                           crc, non_inherit);
1497
1498         /* Override with nontransmitted profile, if found */
1499         if (nontransmitted_profile_len)
1500                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1501                                             nontransmitted_profile_len,
1502                                             action, elems, 0, 0, NULL);
1503
1504         if (elems->tim && !elems->parse_error) {
1505                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1506
1507                 elems->dtim_period = tim_ie->dtim_period;
1508                 elems->dtim_count = tim_ie->dtim_count;
1509         }
1510
1511         /* Override DTIM period and count if needed */
1512         if (elems->bssid_index &&
1513             elems->bssid_index_len >=
1514             offsetofend(struct ieee80211_bssid_index, dtim_period))
1515                 elems->dtim_period = elems->bssid_index->dtim_period;
1516
1517         if (elems->bssid_index &&
1518             elems->bssid_index_len >=
1519             offsetofend(struct ieee80211_bssid_index, dtim_count))
1520                 elems->dtim_count = elems->bssid_index->dtim_count;
1521
1522         kfree(nontransmitted_profile);
1523
1524         elems->crc = crc;
1525
1526         return elems;
1527 }
1528
1529 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1530                                            struct ieee80211_tx_queue_params
1531                                            *qparam, int ac)
1532 {
1533         struct ieee80211_chanctx_conf *chanctx_conf;
1534         const struct ieee80211_reg_rule *rrule;
1535         const struct ieee80211_wmm_ac *wmm_ac;
1536         u16 center_freq = 0;
1537
1538         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1539             sdata->vif.type != NL80211_IFTYPE_STATION)
1540                 return;
1541
1542         rcu_read_lock();
1543         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1544         if (chanctx_conf)
1545                 center_freq = chanctx_conf->def.chan->center_freq;
1546
1547         if (!center_freq) {
1548                 rcu_read_unlock();
1549                 return;
1550         }
1551
1552         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1553
1554         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1555                 rcu_read_unlock();
1556                 return;
1557         }
1558
1559         if (sdata->vif.type == NL80211_IFTYPE_AP)
1560                 wmm_ac = &rrule->wmm_rule.ap[ac];
1561         else
1562                 wmm_ac = &rrule->wmm_rule.client[ac];
1563         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1564         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1565         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1566         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1567         rcu_read_unlock();
1568 }
1569
1570 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1571                                bool bss_notify, bool enable_qos)
1572 {
1573         struct ieee80211_local *local = sdata->local;
1574         struct ieee80211_tx_queue_params qparam;
1575         struct ieee80211_chanctx_conf *chanctx_conf;
1576         int ac;
1577         bool use_11b;
1578         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1579         int aCWmin, aCWmax;
1580
1581         if (!local->ops->conf_tx)
1582                 return;
1583
1584         if (local->hw.queues < IEEE80211_NUM_ACS)
1585                 return;
1586
1587         memset(&qparam, 0, sizeof(qparam));
1588
1589         rcu_read_lock();
1590         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1591         use_11b = (chanctx_conf &&
1592                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1593                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1594         rcu_read_unlock();
1595
1596         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1597
1598         /* Set defaults according to 802.11-2007 Table 7-37 */
1599         aCWmax = 1023;
1600         if (use_11b)
1601                 aCWmin = 31;
1602         else
1603                 aCWmin = 15;
1604
1605         /* Confiure old 802.11b/g medium access rules. */
1606         qparam.cw_max = aCWmax;
1607         qparam.cw_min = aCWmin;
1608         qparam.txop = 0;
1609         qparam.aifs = 2;
1610
1611         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1612                 /* Update if QoS is enabled. */
1613                 if (enable_qos) {
1614                         switch (ac) {
1615                         case IEEE80211_AC_BK:
1616                                 qparam.cw_max = aCWmax;
1617                                 qparam.cw_min = aCWmin;
1618                                 qparam.txop = 0;
1619                                 if (is_ocb)
1620                                         qparam.aifs = 9;
1621                                 else
1622                                         qparam.aifs = 7;
1623                                 break;
1624                         /* never happens but let's not leave undefined */
1625                         default:
1626                         case IEEE80211_AC_BE:
1627                                 qparam.cw_max = aCWmax;
1628                                 qparam.cw_min = aCWmin;
1629                                 qparam.txop = 0;
1630                                 if (is_ocb)
1631                                         qparam.aifs = 6;
1632                                 else
1633                                         qparam.aifs = 3;
1634                                 break;
1635                         case IEEE80211_AC_VI:
1636                                 qparam.cw_max = aCWmin;
1637                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1638                                 if (is_ocb)
1639                                         qparam.txop = 0;
1640                                 else if (use_11b)
1641                                         qparam.txop = 6016/32;
1642                                 else
1643                                         qparam.txop = 3008/32;
1644
1645                                 if (is_ocb)
1646                                         qparam.aifs = 3;
1647                                 else
1648                                         qparam.aifs = 2;
1649                                 break;
1650                         case IEEE80211_AC_VO:
1651                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1652                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1653                                 if (is_ocb)
1654                                         qparam.txop = 0;
1655                                 else if (use_11b)
1656                                         qparam.txop = 3264/32;
1657                                 else
1658                                         qparam.txop = 1504/32;
1659                                 qparam.aifs = 2;
1660                                 break;
1661                         }
1662                 }
1663                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1664
1665                 qparam.uapsd = false;
1666
1667                 sdata->tx_conf[ac] = qparam;
1668                 drv_conf_tx(local, sdata, ac, &qparam);
1669         }
1670
1671         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1672             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1673             sdata->vif.type != NL80211_IFTYPE_NAN) {
1674                 sdata->vif.bss_conf.qos = enable_qos;
1675                 if (bss_notify)
1676                         ieee80211_bss_info_change_notify(sdata,
1677                                                          BSS_CHANGED_QOS);
1678         }
1679 }
1680
1681 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1682                          u16 transaction, u16 auth_alg, u16 status,
1683                          const u8 *extra, size_t extra_len, const u8 *da,
1684                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1685                          u32 tx_flags)
1686 {
1687         struct ieee80211_local *local = sdata->local;
1688         struct sk_buff *skb;
1689         struct ieee80211_mgmt *mgmt;
1690         int err;
1691
1692         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1693         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1694                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1695         if (!skb)
1696                 return;
1697
1698         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1699
1700         mgmt = skb_put_zero(skb, 24 + 6);
1701         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1702                                           IEEE80211_STYPE_AUTH);
1703         memcpy(mgmt->da, da, ETH_ALEN);
1704         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1705         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1706         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1707         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1708         mgmt->u.auth.status_code = cpu_to_le16(status);
1709         if (extra)
1710                 skb_put_data(skb, extra, extra_len);
1711
1712         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1713                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1714                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1715                 if (WARN_ON(err)) {
1716                         kfree_skb(skb);
1717                         return;
1718                 }
1719         }
1720
1721         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1722                                         tx_flags;
1723         ieee80211_tx_skb(sdata, skb);
1724 }
1725
1726 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1727                                     const u8 *da, const u8 *bssid,
1728                                     u16 stype, u16 reason,
1729                                     bool send_frame, u8 *frame_buf)
1730 {
1731         struct ieee80211_local *local = sdata->local;
1732         struct sk_buff *skb;
1733         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1734
1735         /* build frame */
1736         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1737         mgmt->duration = 0; /* initialize only */
1738         mgmt->seq_ctrl = 0; /* initialize only */
1739         memcpy(mgmt->da, da, ETH_ALEN);
1740         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1741         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1742         /* u.deauth.reason_code == u.disassoc.reason_code */
1743         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1744
1745         if (send_frame) {
1746                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1747                                     IEEE80211_DEAUTH_FRAME_LEN);
1748                 if (!skb)
1749                         return;
1750
1751                 skb_reserve(skb, local->hw.extra_tx_headroom);
1752
1753                 /* copy in frame */
1754                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1755
1756                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1757                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1758                         IEEE80211_SKB_CB(skb)->flags |=
1759                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1760
1761                 ieee80211_tx_skb(sdata, skb);
1762         }
1763 }
1764
1765 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1766 {
1767         if ((end - pos) < 5)
1768                 return pos;
1769
1770         *pos++ = WLAN_EID_EXTENSION;
1771         *pos++ = 1 + sizeof(cap);
1772         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1773         memcpy(pos, &cap, sizeof(cap));
1774
1775         return pos + 2;
1776 }
1777
1778 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1779                                          u8 *buffer, size_t buffer_len,
1780                                          const u8 *ie, size_t ie_len,
1781                                          enum nl80211_band band,
1782                                          u32 rate_mask,
1783                                          struct cfg80211_chan_def *chandef,
1784                                          size_t *offset, u32 flags)
1785 {
1786         struct ieee80211_local *local = sdata->local;
1787         struct ieee80211_supported_band *sband;
1788         const struct ieee80211_sta_he_cap *he_cap;
1789         u8 *pos = buffer, *end = buffer + buffer_len;
1790         size_t noffset;
1791         int supp_rates_len, i;
1792         u8 rates[32];
1793         int num_rates;
1794         int ext_rates_len;
1795         int shift;
1796         u32 rate_flags;
1797         bool have_80mhz = false;
1798
1799         *offset = 0;
1800
1801         sband = local->hw.wiphy->bands[band];
1802         if (WARN_ON_ONCE(!sband))
1803                 return 0;
1804
1805         rate_flags = ieee80211_chandef_rate_flags(chandef);
1806         shift = ieee80211_chandef_get_shift(chandef);
1807
1808         num_rates = 0;
1809         for (i = 0; i < sband->n_bitrates; i++) {
1810                 if ((BIT(i) & rate_mask) == 0)
1811                         continue; /* skip rate */
1812                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1813                         continue;
1814
1815                 rates[num_rates++] =
1816                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1817                                           (1 << shift) * 5);
1818         }
1819
1820         supp_rates_len = min_t(int, num_rates, 8);
1821
1822         if (end - pos < 2 + supp_rates_len)
1823                 goto out_err;
1824         *pos++ = WLAN_EID_SUPP_RATES;
1825         *pos++ = supp_rates_len;
1826         memcpy(pos, rates, supp_rates_len);
1827         pos += supp_rates_len;
1828
1829         /* insert "request information" if in custom IEs */
1830         if (ie && ie_len) {
1831                 static const u8 before_extrates[] = {
1832                         WLAN_EID_SSID,
1833                         WLAN_EID_SUPP_RATES,
1834                         WLAN_EID_REQUEST,
1835                 };
1836                 noffset = ieee80211_ie_split(ie, ie_len,
1837                                              before_extrates,
1838                                              ARRAY_SIZE(before_extrates),
1839                                              *offset);
1840                 if (end - pos < noffset - *offset)
1841                         goto out_err;
1842                 memcpy(pos, ie + *offset, noffset - *offset);
1843                 pos += noffset - *offset;
1844                 *offset = noffset;
1845         }
1846
1847         ext_rates_len = num_rates - supp_rates_len;
1848         if (ext_rates_len > 0) {
1849                 if (end - pos < 2 + ext_rates_len)
1850                         goto out_err;
1851                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1852                 *pos++ = ext_rates_len;
1853                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1854                 pos += ext_rates_len;
1855         }
1856
1857         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1858                 if (end - pos < 3)
1859                         goto out_err;
1860                 *pos++ = WLAN_EID_DS_PARAMS;
1861                 *pos++ = 1;
1862                 *pos++ = ieee80211_frequency_to_channel(
1863                                 chandef->chan->center_freq);
1864         }
1865
1866         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1867                 goto done;
1868
1869         /* insert custom IEs that go before HT */
1870         if (ie && ie_len) {
1871                 static const u8 before_ht[] = {
1872                         /*
1873                          * no need to list the ones split off already
1874                          * (or generated here)
1875                          */
1876                         WLAN_EID_DS_PARAMS,
1877                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1878                 };
1879                 noffset = ieee80211_ie_split(ie, ie_len,
1880                                              before_ht, ARRAY_SIZE(before_ht),
1881                                              *offset);
1882                 if (end - pos < noffset - *offset)
1883                         goto out_err;
1884                 memcpy(pos, ie + *offset, noffset - *offset);
1885                 pos += noffset - *offset;
1886                 *offset = noffset;
1887         }
1888
1889         if (sband->ht_cap.ht_supported) {
1890                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1891                         goto out_err;
1892                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1893                                                 sband->ht_cap.cap);
1894         }
1895
1896         /* insert custom IEs that go before VHT */
1897         if (ie && ie_len) {
1898                 static const u8 before_vht[] = {
1899                         /*
1900                          * no need to list the ones split off already
1901                          * (or generated here)
1902                          */
1903                         WLAN_EID_BSS_COEX_2040,
1904                         WLAN_EID_EXT_CAPABILITY,
1905                         WLAN_EID_SSID_LIST,
1906                         WLAN_EID_CHANNEL_USAGE,
1907                         WLAN_EID_INTERWORKING,
1908                         WLAN_EID_MESH_ID,
1909                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1910                 };
1911                 noffset = ieee80211_ie_split(ie, ie_len,
1912                                              before_vht, ARRAY_SIZE(before_vht),
1913                                              *offset);
1914                 if (end - pos < noffset - *offset)
1915                         goto out_err;
1916                 memcpy(pos, ie + *offset, noffset - *offset);
1917                 pos += noffset - *offset;
1918                 *offset = noffset;
1919         }
1920
1921         /* Check if any channel in this sband supports at least 80 MHz */
1922         for (i = 0; i < sband->n_channels; i++) {
1923                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1924                                                 IEEE80211_CHAN_NO_80MHZ))
1925                         continue;
1926
1927                 have_80mhz = true;
1928                 break;
1929         }
1930
1931         if (sband->vht_cap.vht_supported && have_80mhz) {
1932                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1933                         goto out_err;
1934                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1935                                                  sband->vht_cap.cap);
1936         }
1937
1938         /* insert custom IEs that go before HE */
1939         if (ie && ie_len) {
1940                 static const u8 before_he[] = {
1941                         /*
1942                          * no need to list the ones split off before VHT
1943                          * or generated here
1944                          */
1945                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1946                         WLAN_EID_AP_CSN,
1947                         /* TODO: add 11ah/11aj/11ak elements */
1948                 };
1949                 noffset = ieee80211_ie_split(ie, ie_len,
1950                                              before_he, ARRAY_SIZE(before_he),
1951                                              *offset);
1952                 if (end - pos < noffset - *offset)
1953                         goto out_err;
1954                 memcpy(pos, ie + *offset, noffset - *offset);
1955                 pos += noffset - *offset;
1956                 *offset = noffset;
1957         }
1958
1959         he_cap = ieee80211_get_he_iftype_cap(sband,
1960                                              ieee80211_vif_type_p2p(&sdata->vif));
1961         if (he_cap &&
1962             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1963                                          IEEE80211_CHAN_NO_HE)) {
1964                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1965                 if (!pos)
1966                         goto out_err;
1967         }
1968
1969         if (cfg80211_any_usable_channels(local->hw.wiphy,
1970                                          BIT(NL80211_BAND_6GHZ),
1971                                          IEEE80211_CHAN_NO_HE)) {
1972                 struct ieee80211_supported_band *sband6;
1973
1974                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1975                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1976                                 ieee80211_vif_type_p2p(&sdata->vif));
1977
1978                 if (he_cap) {
1979                         enum nl80211_iftype iftype =
1980                                 ieee80211_vif_type_p2p(&sdata->vif);
1981                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1982
1983                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1984                 }
1985         }
1986
1987         /*
1988          * If adding more here, adjust code in main.c
1989          * that calculates local->scan_ies_len.
1990          */
1991
1992         return pos - buffer;
1993  out_err:
1994         WARN_ONCE(1, "not enough space for preq IEs\n");
1995  done:
1996         return pos - buffer;
1997 }
1998
1999 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2000                              size_t buffer_len,
2001                              struct ieee80211_scan_ies *ie_desc,
2002                              const u8 *ie, size_t ie_len,
2003                              u8 bands_used, u32 *rate_masks,
2004                              struct cfg80211_chan_def *chandef,
2005                              u32 flags)
2006 {
2007         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2008         int i;
2009
2010         memset(ie_desc, 0, sizeof(*ie_desc));
2011
2012         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2013                 if (bands_used & BIT(i)) {
2014                         pos += ieee80211_build_preq_ies_band(sdata,
2015                                                              buffer + pos,
2016                                                              buffer_len - pos,
2017                                                              ie, ie_len, i,
2018                                                              rate_masks[i],
2019                                                              chandef,
2020                                                              &custom_ie_offset,
2021                                                              flags);
2022                         ie_desc->ies[i] = buffer + old_pos;
2023                         ie_desc->len[i] = pos - old_pos;
2024                         old_pos = pos;
2025                 }
2026         }
2027
2028         /* add any remaining custom IEs */
2029         if (ie && ie_len) {
2030                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2031                               "not enough space for preq custom IEs\n"))
2032                         return pos;
2033                 memcpy(buffer + pos, ie + custom_ie_offset,
2034                        ie_len - custom_ie_offset);
2035                 ie_desc->common_ies = buffer + pos;
2036                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2037                 pos += ie_len - custom_ie_offset;
2038         }
2039
2040         return pos;
2041 };
2042
2043 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2044                                           const u8 *src, const u8 *dst,
2045                                           u32 ratemask,
2046                                           struct ieee80211_channel *chan,
2047                                           const u8 *ssid, size_t ssid_len,
2048                                           const u8 *ie, size_t ie_len,
2049                                           u32 flags)
2050 {
2051         struct ieee80211_local *local = sdata->local;
2052         struct cfg80211_chan_def chandef;
2053         struct sk_buff *skb;
2054         struct ieee80211_mgmt *mgmt;
2055         int ies_len;
2056         u32 rate_masks[NUM_NL80211_BANDS] = {};
2057         struct ieee80211_scan_ies dummy_ie_desc;
2058
2059         /*
2060          * Do not send DS Channel parameter for directed probe requests
2061          * in order to maximize the chance that we get a response.  Some
2062          * badly-behaved APs don't respond when this parameter is included.
2063          */
2064         chandef.width = sdata->vif.bss_conf.chandef.width;
2065         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2066                 chandef.chan = NULL;
2067         else
2068                 chandef.chan = chan;
2069
2070         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2071                                      local->scan_ies_len + ie_len);
2072         if (!skb)
2073                 return NULL;
2074
2075         rate_masks[chan->band] = ratemask;
2076         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2077                                            skb_tailroom(skb), &dummy_ie_desc,
2078                                            ie, ie_len, BIT(chan->band),
2079                                            rate_masks, &chandef, flags);
2080         skb_put(skb, ies_len);
2081
2082         if (dst) {
2083                 mgmt = (struct ieee80211_mgmt *) skb->data;
2084                 memcpy(mgmt->da, dst, ETH_ALEN);
2085                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2086         }
2087
2088         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2089
2090         return skb;
2091 }
2092
2093 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2094                             struct ieee802_11_elems *elems,
2095                             enum nl80211_band band, u32 *basic_rates)
2096 {
2097         struct ieee80211_supported_band *sband;
2098         size_t num_rates;
2099         u32 supp_rates, rate_flags;
2100         int i, j, shift;
2101
2102         sband = sdata->local->hw.wiphy->bands[band];
2103         if (WARN_ON(!sband))
2104                 return 1;
2105
2106         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2107         shift = ieee80211_vif_get_shift(&sdata->vif);
2108
2109         num_rates = sband->n_bitrates;
2110         supp_rates = 0;
2111         for (i = 0; i < elems->supp_rates_len +
2112                      elems->ext_supp_rates_len; i++) {
2113                 u8 rate = 0;
2114                 int own_rate;
2115                 bool is_basic;
2116                 if (i < elems->supp_rates_len)
2117                         rate = elems->supp_rates[i];
2118                 else if (elems->ext_supp_rates)
2119                         rate = elems->ext_supp_rates
2120                                 [i - elems->supp_rates_len];
2121                 own_rate = 5 * (rate & 0x7f);
2122                 is_basic = !!(rate & 0x80);
2123
2124                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2125                         continue;
2126
2127                 for (j = 0; j < num_rates; j++) {
2128                         int brate;
2129                         if ((rate_flags & sband->bitrates[j].flags)
2130                             != rate_flags)
2131                                 continue;
2132
2133                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2134                                              1 << shift);
2135
2136                         if (brate == own_rate) {
2137                                 supp_rates |= BIT(j);
2138                                 if (basic_rates && is_basic)
2139                                         *basic_rates |= BIT(j);
2140                         }
2141                 }
2142         }
2143         return supp_rates;
2144 }
2145
2146 void ieee80211_stop_device(struct ieee80211_local *local)
2147 {
2148         ieee80211_led_radio(local, false);
2149         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2150
2151         cancel_work_sync(&local->reconfig_filter);
2152
2153         flush_workqueue(local->workqueue);
2154         drv_stop(local);
2155 }
2156
2157 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2158                                            bool aborted)
2159 {
2160         /* It's possible that we don't handle the scan completion in
2161          * time during suspend, so if it's still marked as completed
2162          * here, queue the work and flush it to clean things up.
2163          * Instead of calling the worker function directly here, we
2164          * really queue it to avoid potential races with other flows
2165          * scheduling the same work.
2166          */
2167         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2168                 /* If coming from reconfiguration failure, abort the scan so
2169                  * we don't attempt to continue a partial HW scan - which is
2170                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2171                  * completed scan, and a 5 GHz portion is still pending.
2172                  */
2173                 if (aborted)
2174                         set_bit(SCAN_ABORTED, &local->scanning);
2175                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2176                 flush_delayed_work(&local->scan_work);
2177         }
2178 }
2179
2180 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2181 {
2182         struct ieee80211_sub_if_data *sdata;
2183         struct ieee80211_chanctx *ctx;
2184
2185         /*
2186          * We get here if during resume the device can't be restarted properly.
2187          * We might also get here if this happens during HW reset, which is a
2188          * slightly different situation and we need to drop all connections in
2189          * the latter case.
2190          *
2191          * Ask cfg80211 to turn off all interfaces, this will result in more
2192          * warnings but at least we'll then get into a clean stopped state.
2193          */
2194
2195         local->resuming = false;
2196         local->suspended = false;
2197         local->in_reconfig = false;
2198
2199         ieee80211_flush_completed_scan(local, true);
2200
2201         /* scheduled scan clearly can't be running any more, but tell
2202          * cfg80211 and clear local state
2203          */
2204         ieee80211_sched_scan_end(local);
2205
2206         list_for_each_entry(sdata, &local->interfaces, list)
2207                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2208
2209         /* Mark channel contexts as not being in the driver any more to avoid
2210          * removing them from the driver during the shutdown process...
2211          */
2212         mutex_lock(&local->chanctx_mtx);
2213         list_for_each_entry(ctx, &local->chanctx_list, list)
2214                 ctx->driver_present = false;
2215         mutex_unlock(&local->chanctx_mtx);
2216 }
2217
2218 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2219                                      struct ieee80211_sub_if_data *sdata)
2220 {
2221         struct ieee80211_chanctx_conf *conf;
2222         struct ieee80211_chanctx *ctx;
2223
2224         if (!local->use_chanctx)
2225                 return;
2226
2227         mutex_lock(&local->chanctx_mtx);
2228         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2229                                          lockdep_is_held(&local->chanctx_mtx));
2230         if (conf) {
2231                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2232                 drv_assign_vif_chanctx(local, sdata, ctx);
2233         }
2234         mutex_unlock(&local->chanctx_mtx);
2235 }
2236
2237 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2238 {
2239         struct ieee80211_local *local = sdata->local;
2240         struct sta_info *sta;
2241
2242         /* add STAs back */
2243         mutex_lock(&local->sta_mtx);
2244         list_for_each_entry(sta, &local->sta_list, list) {
2245                 enum ieee80211_sta_state state;
2246
2247                 if (!sta->uploaded || sta->sdata != sdata)
2248                         continue;
2249
2250                 for (state = IEEE80211_STA_NOTEXIST;
2251                      state < sta->sta_state; state++)
2252                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2253                                               state + 1));
2254         }
2255         mutex_unlock(&local->sta_mtx);
2256 }
2257
2258 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2259 {
2260         struct cfg80211_nan_func *func, **funcs;
2261         int res, id, i = 0;
2262
2263         res = drv_start_nan(sdata->local, sdata,
2264                             &sdata->u.nan.conf);
2265         if (WARN_ON(res))
2266                 return res;
2267
2268         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2269                         sizeof(*funcs),
2270                         GFP_KERNEL);
2271         if (!funcs)
2272                 return -ENOMEM;
2273
2274         /* Add all the functions:
2275          * This is a little bit ugly. We need to call a potentially sleeping
2276          * callback for each NAN function, so we can't hold the spinlock.
2277          */
2278         spin_lock_bh(&sdata->u.nan.func_lock);
2279
2280         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2281                 funcs[i++] = func;
2282
2283         spin_unlock_bh(&sdata->u.nan.func_lock);
2284
2285         for (i = 0; funcs[i]; i++) {
2286                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2287                 if (WARN_ON(res))
2288                         ieee80211_nan_func_terminated(&sdata->vif,
2289                                                       funcs[i]->instance_id,
2290                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2291                                                       GFP_KERNEL);
2292         }
2293
2294         kfree(funcs);
2295
2296         return 0;
2297 }
2298
2299 int ieee80211_reconfig(struct ieee80211_local *local)
2300 {
2301         struct ieee80211_hw *hw = &local->hw;
2302         struct ieee80211_sub_if_data *sdata;
2303         struct ieee80211_chanctx *ctx;
2304         struct sta_info *sta;
2305         int res, i;
2306         bool reconfig_due_to_wowlan = false;
2307         struct ieee80211_sub_if_data *sched_scan_sdata;
2308         struct cfg80211_sched_scan_request *sched_scan_req;
2309         bool sched_scan_stopped = false;
2310         bool suspended = local->suspended;
2311
2312         /* nothing to do if HW shouldn't run */
2313         if (!local->open_count)
2314                 goto wake_up;
2315
2316 #ifdef CONFIG_PM
2317         if (suspended)
2318                 local->resuming = true;
2319
2320         if (local->wowlan) {
2321                 /*
2322                  * In the wowlan case, both mac80211 and the device
2323                  * are functional when the resume op is called, so
2324                  * clear local->suspended so the device could operate
2325                  * normally (e.g. pass rx frames).
2326                  */
2327                 local->suspended = false;
2328                 res = drv_resume(local);
2329                 local->wowlan = false;
2330                 if (res < 0) {
2331                         local->resuming = false;
2332                         return res;
2333                 }
2334                 if (res == 0)
2335                         goto wake_up;
2336                 WARN_ON(res > 1);
2337                 /*
2338                  * res is 1, which means the driver requested
2339                  * to go through a regular reset on wakeup.
2340                  * restore local->suspended in this case.
2341                  */
2342                 reconfig_due_to_wowlan = true;
2343                 local->suspended = true;
2344         }
2345 #endif
2346
2347         /*
2348          * In case of hw_restart during suspend (without wowlan),
2349          * cancel restart work, as we are reconfiguring the device
2350          * anyway.
2351          * Note that restart_work is scheduled on a frozen workqueue,
2352          * so we can't deadlock in this case.
2353          */
2354         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2355                 cancel_work_sync(&local->restart_work);
2356
2357         local->started = false;
2358
2359         /*
2360          * Upon resume hardware can sometimes be goofy due to
2361          * various platform / driver / bus issues, so restarting
2362          * the device may at times not work immediately. Propagate
2363          * the error.
2364          */
2365         res = drv_start(local);
2366         if (res) {
2367                 if (suspended)
2368                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2369                 else
2370                         WARN(1, "Hardware became unavailable during restart.\n");
2371                 ieee80211_handle_reconfig_failure(local);
2372                 return res;
2373         }
2374
2375         /* setup fragmentation threshold */
2376         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2377
2378         /* setup RTS threshold */
2379         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2380
2381         /* reset coverage class */
2382         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2383
2384         ieee80211_led_radio(local, true);
2385         ieee80211_mod_tpt_led_trig(local,
2386                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2387
2388         /* add interfaces */
2389         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2390         if (sdata) {
2391                 /* in HW restart it exists already */
2392                 WARN_ON(local->resuming);
2393                 res = drv_add_interface(local, sdata);
2394                 if (WARN_ON(res)) {
2395                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2396                         synchronize_net();
2397                         kfree(sdata);
2398                 }
2399         }
2400
2401         list_for_each_entry(sdata, &local->interfaces, list) {
2402                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2403                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2404                     ieee80211_sdata_running(sdata)) {
2405                         res = drv_add_interface(local, sdata);
2406                         if (WARN_ON(res))
2407                                 break;
2408                 }
2409         }
2410
2411         /* If adding any of the interfaces failed above, roll back and
2412          * report failure.
2413          */
2414         if (res) {
2415                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2416                                                      list)
2417                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2418                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2419                             ieee80211_sdata_running(sdata))
2420                                 drv_remove_interface(local, sdata);
2421                 ieee80211_handle_reconfig_failure(local);
2422                 return res;
2423         }
2424
2425         /* add channel contexts */
2426         if (local->use_chanctx) {
2427                 mutex_lock(&local->chanctx_mtx);
2428                 list_for_each_entry(ctx, &local->chanctx_list, list)
2429                         if (ctx->replace_state !=
2430                             IEEE80211_CHANCTX_REPLACES_OTHER)
2431                                 WARN_ON(drv_add_chanctx(local, ctx));
2432                 mutex_unlock(&local->chanctx_mtx);
2433
2434                 sdata = wiphy_dereference(local->hw.wiphy,
2435                                           local->monitor_sdata);
2436                 if (sdata && ieee80211_sdata_running(sdata))
2437                         ieee80211_assign_chanctx(local, sdata);
2438         }
2439
2440         /* reconfigure hardware */
2441         ieee80211_hw_config(local, ~0);
2442
2443         ieee80211_configure_filter(local);
2444
2445         /* Finally also reconfigure all the BSS information */
2446         list_for_each_entry(sdata, &local->interfaces, list) {
2447                 u32 changed;
2448
2449                 if (!ieee80211_sdata_running(sdata))
2450                         continue;
2451
2452                 ieee80211_assign_chanctx(local, sdata);
2453
2454                 switch (sdata->vif.type) {
2455                 case NL80211_IFTYPE_AP_VLAN:
2456                 case NL80211_IFTYPE_MONITOR:
2457                         break;
2458                 case NL80211_IFTYPE_ADHOC:
2459                         if (sdata->vif.bss_conf.ibss_joined)
2460                                 WARN_ON(drv_join_ibss(local, sdata));
2461                         fallthrough;
2462                 default:
2463                         ieee80211_reconfig_stations(sdata);
2464                         fallthrough;
2465                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2466                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2467                                 drv_conf_tx(local, sdata, i,
2468                                             &sdata->tx_conf[i]);
2469                         break;
2470                 }
2471
2472                 /* common change flags for all interface types */
2473                 changed = BSS_CHANGED_ERP_CTS_PROT |
2474                           BSS_CHANGED_ERP_PREAMBLE |
2475                           BSS_CHANGED_ERP_SLOT |
2476                           BSS_CHANGED_HT |
2477                           BSS_CHANGED_BASIC_RATES |
2478                           BSS_CHANGED_BEACON_INT |
2479                           BSS_CHANGED_BSSID |
2480                           BSS_CHANGED_CQM |
2481                           BSS_CHANGED_QOS |
2482                           BSS_CHANGED_IDLE |
2483                           BSS_CHANGED_TXPOWER |
2484                           BSS_CHANGED_MCAST_RATE;
2485
2486                 if (sdata->vif.mu_mimo_owner)
2487                         changed |= BSS_CHANGED_MU_GROUPS;
2488
2489                 switch (sdata->vif.type) {
2490                 case NL80211_IFTYPE_STATION:
2491                         changed |= BSS_CHANGED_ASSOC |
2492                                    BSS_CHANGED_ARP_FILTER |
2493                                    BSS_CHANGED_PS;
2494
2495                         /* Re-send beacon info report to the driver */
2496                         if (sdata->u.mgd.have_beacon)
2497                                 changed |= BSS_CHANGED_BEACON_INFO;
2498
2499                         if (sdata->vif.bss_conf.max_idle_period ||
2500                             sdata->vif.bss_conf.protected_keep_alive)
2501                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2502
2503                         sdata_lock(sdata);
2504                         ieee80211_bss_info_change_notify(sdata, changed);
2505                         sdata_unlock(sdata);
2506                         break;
2507                 case NL80211_IFTYPE_OCB:
2508                         changed |= BSS_CHANGED_OCB;
2509                         ieee80211_bss_info_change_notify(sdata, changed);
2510                         break;
2511                 case NL80211_IFTYPE_ADHOC:
2512                         changed |= BSS_CHANGED_IBSS;
2513                         fallthrough;
2514                 case NL80211_IFTYPE_AP:
2515                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2516
2517                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2518                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2519                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2520                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2521
2522                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2523                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2524
2525                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2526                                         drv_start_ap(local, sdata);
2527                         }
2528                         fallthrough;
2529                 case NL80211_IFTYPE_MESH_POINT:
2530                         if (sdata->vif.bss_conf.enable_beacon) {
2531                                 changed |= BSS_CHANGED_BEACON |
2532                                            BSS_CHANGED_BEACON_ENABLED;
2533                                 ieee80211_bss_info_change_notify(sdata, changed);
2534                         }
2535                         break;
2536                 case NL80211_IFTYPE_NAN:
2537                         res = ieee80211_reconfig_nan(sdata);
2538                         if (res < 0) {
2539                                 ieee80211_handle_reconfig_failure(local);
2540                                 return res;
2541                         }
2542                         break;
2543                 case NL80211_IFTYPE_AP_VLAN:
2544                 case NL80211_IFTYPE_MONITOR:
2545                 case NL80211_IFTYPE_P2P_DEVICE:
2546                         /* nothing to do */
2547                         break;
2548                 case NL80211_IFTYPE_UNSPECIFIED:
2549                 case NUM_NL80211_IFTYPES:
2550                 case NL80211_IFTYPE_P2P_CLIENT:
2551                 case NL80211_IFTYPE_P2P_GO:
2552                 case NL80211_IFTYPE_WDS:
2553                         WARN_ON(1);
2554                         break;
2555                 }
2556         }
2557
2558         ieee80211_recalc_ps(local);
2559
2560         /*
2561          * The sta might be in psm against the ap (e.g. because
2562          * this was the state before a hw restart), so we
2563          * explicitly send a null packet in order to make sure
2564          * it'll sync against the ap (and get out of psm).
2565          */
2566         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2567                 list_for_each_entry(sdata, &local->interfaces, list) {
2568                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2569                                 continue;
2570                         if (!sdata->u.mgd.associated)
2571                                 continue;
2572
2573                         ieee80211_send_nullfunc(local, sdata, false);
2574                 }
2575         }
2576
2577         /* APs are now beaconing, add back stations */
2578         mutex_lock(&local->sta_mtx);
2579         list_for_each_entry(sta, &local->sta_list, list) {
2580                 enum ieee80211_sta_state state;
2581
2582                 if (!sta->uploaded)
2583                         continue;
2584
2585                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2586                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2587                         continue;
2588
2589                 for (state = IEEE80211_STA_NOTEXIST;
2590                      state < sta->sta_state; state++)
2591                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2592                                               state + 1));
2593         }
2594         mutex_unlock(&local->sta_mtx);
2595
2596         /* add back keys */
2597         list_for_each_entry(sdata, &local->interfaces, list)
2598                 ieee80211_reenable_keys(sdata);
2599
2600         /* Reconfigure sched scan if it was interrupted by FW restart */
2601         mutex_lock(&local->mtx);
2602         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2603                                                 lockdep_is_held(&local->mtx));
2604         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2605                                                 lockdep_is_held(&local->mtx));
2606         if (sched_scan_sdata && sched_scan_req)
2607                 /*
2608                  * Sched scan stopped, but we don't want to report it. Instead,
2609                  * we're trying to reschedule. However, if more than one scan
2610                  * plan was set, we cannot reschedule since we don't know which
2611                  * scan plan was currently running (and some scan plans may have
2612                  * already finished).
2613                  */
2614                 if (sched_scan_req->n_scan_plans > 1 ||
2615                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2616                                                          sched_scan_req)) {
2617                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2618                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2619                         sched_scan_stopped = true;
2620                 }
2621         mutex_unlock(&local->mtx);
2622
2623         if (sched_scan_stopped)
2624                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2625
2626  wake_up:
2627
2628         if (local->monitors == local->open_count && local->monitors > 0)
2629                 ieee80211_add_virtual_monitor(local);
2630
2631         /*
2632          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2633          * sessions can be established after a resume.
2634          *
2635          * Also tear down aggregation sessions since reconfiguring
2636          * them in a hardware restart scenario is not easily done
2637          * right now, and the hardware will have lost information
2638          * about the sessions, but we and the AP still think they
2639          * are active. This is really a workaround though.
2640          */
2641         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2642                 mutex_lock(&local->sta_mtx);
2643
2644                 list_for_each_entry(sta, &local->sta_list, list) {
2645                         if (!local->resuming)
2646                                 ieee80211_sta_tear_down_BA_sessions(
2647                                                 sta, AGG_STOP_LOCAL_REQUEST);
2648                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2649                 }
2650
2651                 mutex_unlock(&local->sta_mtx);
2652         }
2653
2654         /*
2655          * If this is for hw restart things are still running.
2656          * We may want to change that later, however.
2657          */
2658         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2659                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2660
2661         if (local->in_reconfig) {
2662                 local->in_reconfig = false;
2663                 barrier();
2664
2665                 /* Restart deferred ROCs */
2666                 mutex_lock(&local->mtx);
2667                 ieee80211_start_next_roc(local);
2668                 mutex_unlock(&local->mtx);
2669
2670                 /* Requeue all works */
2671                 list_for_each_entry(sdata, &local->interfaces, list)
2672                         ieee80211_queue_work(&local->hw, &sdata->work);
2673         }
2674
2675         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2676                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2677                                         false);
2678
2679         if (!suspended)
2680                 return 0;
2681
2682 #ifdef CONFIG_PM
2683         /* first set suspended false, then resuming */
2684         local->suspended = false;
2685         mb();
2686         local->resuming = false;
2687
2688         ieee80211_flush_completed_scan(local, false);
2689
2690         if (local->open_count && !reconfig_due_to_wowlan)
2691                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2692
2693         list_for_each_entry(sdata, &local->interfaces, list) {
2694                 if (!ieee80211_sdata_running(sdata))
2695                         continue;
2696                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2697                         ieee80211_sta_restart(sdata);
2698         }
2699
2700         mod_timer(&local->sta_cleanup, jiffies + 1);
2701 #else
2702         WARN_ON(1);
2703 #endif
2704
2705         return 0;
2706 }
2707
2708 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2709 {
2710         struct ieee80211_sub_if_data *sdata;
2711         struct ieee80211_local *local;
2712         struct ieee80211_key *key;
2713
2714         if (WARN_ON(!vif))
2715                 return;
2716
2717         sdata = vif_to_sdata(vif);
2718         local = sdata->local;
2719
2720         if (WARN_ON(!local->resuming))
2721                 return;
2722
2723         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2724                 return;
2725
2726         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2727
2728         mutex_lock(&local->key_mtx);
2729         list_for_each_entry(key, &sdata->key_list, list)
2730                 key->flags |= KEY_FLAG_TAINTED;
2731         mutex_unlock(&local->key_mtx);
2732 }
2733 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2734
2735 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2736 {
2737         struct ieee80211_local *local = sdata->local;
2738         struct ieee80211_chanctx_conf *chanctx_conf;
2739         struct ieee80211_chanctx *chanctx;
2740
2741         mutex_lock(&local->chanctx_mtx);
2742
2743         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2744                                         lockdep_is_held(&local->chanctx_mtx));
2745
2746         /*
2747          * This function can be called from a work, thus it may be possible
2748          * that the chanctx_conf is removed (due to a disconnection, for
2749          * example).
2750          * So nothing should be done in such case.
2751          */
2752         if (!chanctx_conf)
2753                 goto unlock;
2754
2755         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2756         ieee80211_recalc_smps_chanctx(local, chanctx);
2757  unlock:
2758         mutex_unlock(&local->chanctx_mtx);
2759 }
2760
2761 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2762 {
2763         struct ieee80211_local *local = sdata->local;
2764         struct ieee80211_chanctx_conf *chanctx_conf;
2765         struct ieee80211_chanctx *chanctx;
2766
2767         mutex_lock(&local->chanctx_mtx);
2768
2769         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2770                                         lockdep_is_held(&local->chanctx_mtx));
2771
2772         if (WARN_ON_ONCE(!chanctx_conf))
2773                 goto unlock;
2774
2775         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2776         ieee80211_recalc_chanctx_min_def(local, chanctx);
2777  unlock:
2778         mutex_unlock(&local->chanctx_mtx);
2779 }
2780
2781 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2782 {
2783         size_t pos = offset;
2784
2785         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2786                 pos += 2 + ies[pos + 1];
2787
2788         return pos;
2789 }
2790
2791 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2792                                             int rssi_min_thold,
2793                                             int rssi_max_thold)
2794 {
2795         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2796
2797         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2798                 return;
2799
2800         /*
2801          * Scale up threshold values before storing it, as the RSSI averaging
2802          * algorithm uses a scaled up value as well. Change this scaling
2803          * factor if the RSSI averaging algorithm changes.
2804          */
2805         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2806         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2807 }
2808
2809 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2810                                     int rssi_min_thold,
2811                                     int rssi_max_thold)
2812 {
2813         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2814
2815         WARN_ON(rssi_min_thold == rssi_max_thold ||
2816                 rssi_min_thold > rssi_max_thold);
2817
2818         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2819                                        rssi_max_thold);
2820 }
2821 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2822
2823 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2824 {
2825         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2826
2827         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2828 }
2829 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2830
2831 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2832                               u16 cap)
2833 {
2834         __le16 tmp;
2835
2836         *pos++ = WLAN_EID_HT_CAPABILITY;
2837         *pos++ = sizeof(struct ieee80211_ht_cap);
2838         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2839
2840         /* capability flags */
2841         tmp = cpu_to_le16(cap);
2842         memcpy(pos, &tmp, sizeof(u16));
2843         pos += sizeof(u16);
2844
2845         /* AMPDU parameters */
2846         *pos++ = ht_cap->ampdu_factor |
2847                  (ht_cap->ampdu_density <<
2848                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2849
2850         /* MCS set */
2851         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2852         pos += sizeof(ht_cap->mcs);
2853
2854         /* extended capabilities */
2855         pos += sizeof(__le16);
2856
2857         /* BF capabilities */
2858         pos += sizeof(__le32);
2859
2860         /* antenna selection */
2861         pos += sizeof(u8);
2862
2863         return pos;
2864 }
2865
2866 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2867                                u32 cap)
2868 {
2869         __le32 tmp;
2870
2871         *pos++ = WLAN_EID_VHT_CAPABILITY;
2872         *pos++ = sizeof(struct ieee80211_vht_cap);
2873         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2874
2875         /* capability flags */
2876         tmp = cpu_to_le32(cap);
2877         memcpy(pos, &tmp, sizeof(u32));
2878         pos += sizeof(u32);
2879
2880         /* VHT MCS set */
2881         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2882         pos += sizeof(vht_cap->vht_mcs);
2883
2884         return pos;
2885 }
2886
2887 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2888 {
2889         const struct ieee80211_sta_he_cap *he_cap;
2890         struct ieee80211_supported_band *sband;
2891         u8 n;
2892
2893         sband = ieee80211_get_sband(sdata);
2894         if (!sband)
2895                 return 0;
2896
2897         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2898         if (!he_cap)
2899                 return 0;
2900
2901         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2902         return 2 + 1 +
2903                sizeof(he_cap->he_cap_elem) + n +
2904                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2905                                      he_cap->he_cap_elem.phy_cap_info);
2906 }
2907
2908 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2909                               const struct ieee80211_sta_he_cap *he_cap,
2910                               u8 *end)
2911 {
2912         u8 n;
2913         u8 ie_len;
2914         u8 *orig_pos = pos;
2915
2916         /* Make sure we have place for the IE */
2917         /*
2918          * TODO: the 1 added is because this temporarily is under the EXTENSION
2919          * IE. Get rid of it when it moves.
2920          */
2921         if (!he_cap)
2922                 return orig_pos;
2923
2924         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2925         ie_len = 2 + 1 +
2926                  sizeof(he_cap->he_cap_elem) + n +
2927                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2928                                        he_cap->he_cap_elem.phy_cap_info);
2929
2930         if ((end - pos) < ie_len)
2931                 return orig_pos;
2932
2933         *pos++ = WLAN_EID_EXTENSION;
2934         pos++; /* We'll set the size later below */
2935         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2936
2937         /* Fixed data */
2938         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2939         pos += sizeof(he_cap->he_cap_elem);
2940
2941         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2942         pos += n;
2943
2944         /* Check if PPE Threshold should be present */
2945         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2946              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2947                 goto end;
2948
2949         /*
2950          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2951          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2952          */
2953         n = hweight8(he_cap->ppe_thres[0] &
2954                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2955         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2956                    IEEE80211_PPE_THRES_NSS_POS));
2957
2958         /*
2959          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2960          * total size.
2961          */
2962         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2963         n = DIV_ROUND_UP(n, 8);
2964
2965         /* Copy PPE Thresholds */
2966         memcpy(pos, &he_cap->ppe_thres, n);
2967         pos += n;
2968
2969 end:
2970         orig_pos[1] = (pos - orig_pos) - 2;
2971         return pos;
2972 }
2973
2974 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2975                                     struct sk_buff *skb)
2976 {
2977         struct ieee80211_supported_band *sband;
2978         const struct ieee80211_sband_iftype_data *iftd;
2979         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2980         u8 *pos;
2981         u16 cap;
2982
2983         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2984                                           BIT(NL80211_BAND_6GHZ),
2985                                           IEEE80211_CHAN_NO_HE))
2986                 return;
2987
2988         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2989
2990         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2991         if (!iftd)
2992                 return;
2993
2994         /* Check for device HE 6 GHz capability before adding element */
2995         if (!iftd->he_6ghz_capa.capa)
2996                 return;
2997
2998         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2999         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3000
3001         switch (sdata->smps_mode) {
3002         case IEEE80211_SMPS_AUTOMATIC:
3003         case IEEE80211_SMPS_NUM_MODES:
3004                 WARN_ON(1);
3005                 fallthrough;
3006         case IEEE80211_SMPS_OFF:
3007                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3008                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3009                 break;
3010         case IEEE80211_SMPS_STATIC:
3011                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3012                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3013                 break;
3014         case IEEE80211_SMPS_DYNAMIC:
3015                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3016                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3017                 break;
3018         }
3019
3020         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3021         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3022                                     pos + 2 + 1 + sizeof(cap));
3023 }
3024
3025 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3026                                const struct cfg80211_chan_def *chandef,
3027                                u16 prot_mode, bool rifs_mode)
3028 {
3029         struct ieee80211_ht_operation *ht_oper;
3030         /* Build HT Information */
3031         *pos++ = WLAN_EID_HT_OPERATION;
3032         *pos++ = sizeof(struct ieee80211_ht_operation);
3033         ht_oper = (struct ieee80211_ht_operation *)pos;
3034         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3035                                         chandef->chan->center_freq);
3036         switch (chandef->width) {
3037         case NL80211_CHAN_WIDTH_160:
3038         case NL80211_CHAN_WIDTH_80P80:
3039         case NL80211_CHAN_WIDTH_80:
3040         case NL80211_CHAN_WIDTH_40:
3041                 if (chandef->center_freq1 > chandef->chan->center_freq)
3042                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3043                 else
3044                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3045                 break;
3046         default:
3047                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3048                 break;
3049         }
3050         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3051             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3052             chandef->width != NL80211_CHAN_WIDTH_20)
3053                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3054
3055         if (rifs_mode)
3056                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3057
3058         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3059         ht_oper->stbc_param = 0x0000;
3060
3061         /* It seems that Basic MCS set and Supported MCS set
3062            are identical for the first 10 bytes */
3063         memset(&ht_oper->basic_set, 0, 16);
3064         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3065
3066         return pos + sizeof(struct ieee80211_ht_operation);
3067 }
3068
3069 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3070                                    const struct cfg80211_chan_def *chandef)
3071 {
3072         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3073         *pos++ = 3;                                     /* IE length */
3074         /* New channel width */
3075         switch (chandef->width) {
3076         case NL80211_CHAN_WIDTH_80:
3077                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3078                 break;
3079         case NL80211_CHAN_WIDTH_160:
3080                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3081                 break;
3082         case NL80211_CHAN_WIDTH_80P80:
3083                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3084                 break;
3085         default:
3086                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3087         }
3088
3089         /* new center frequency segment 0 */
3090         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3091         /* new center frequency segment 1 */
3092         if (chandef->center_freq2)
3093                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3094         else
3095                 *pos++ = 0;
3096 }
3097
3098 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3099                                 const struct cfg80211_chan_def *chandef)
3100 {
3101         struct ieee80211_vht_operation *vht_oper;
3102
3103         *pos++ = WLAN_EID_VHT_OPERATION;
3104         *pos++ = sizeof(struct ieee80211_vht_operation);
3105         vht_oper = (struct ieee80211_vht_operation *)pos;
3106         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3107                                                         chandef->center_freq1);
3108         if (chandef->center_freq2)
3109                 vht_oper->center_freq_seg1_idx =
3110                         ieee80211_frequency_to_channel(chandef->center_freq2);
3111         else
3112                 vht_oper->center_freq_seg1_idx = 0x00;
3113
3114         switch (chandef->width) {
3115         case NL80211_CHAN_WIDTH_160:
3116                 /*
3117                  * Convert 160 MHz channel width to new style as interop
3118                  * workaround.
3119                  */
3120                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3121                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3122                 if (chandef->chan->center_freq < chandef->center_freq1)
3123                         vht_oper->center_freq_seg0_idx -= 8;
3124                 else
3125                         vht_oper->center_freq_seg0_idx += 8;
3126                 break;
3127         case NL80211_CHAN_WIDTH_80P80:
3128                 /*
3129                  * Convert 80+80 MHz channel width to new style as interop
3130                  * workaround.
3131                  */
3132                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3133                 break;
3134         case NL80211_CHAN_WIDTH_80:
3135                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3136                 break;
3137         default:
3138                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3139                 break;
3140         }
3141
3142         /* don't require special VHT peer rates */
3143         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3144
3145         return pos + sizeof(struct ieee80211_vht_operation);
3146 }
3147
3148 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3149 {
3150         struct ieee80211_he_operation *he_oper;
3151         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3152         u32 he_oper_params;
3153         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3154
3155         if (chandef->chan->band == NL80211_BAND_6GHZ)
3156                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3157
3158         *pos++ = WLAN_EID_EXTENSION;
3159         *pos++ = ie_len;
3160         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3161
3162         he_oper_params = 0;
3163         he_oper_params |= u32_encode_bits(1023, /* disabled */
3164                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3165         he_oper_params |= u32_encode_bits(1,
3166                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3167         he_oper_params |= u32_encode_bits(1,
3168                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3169         if (chandef->chan->band == NL80211_BAND_6GHZ)
3170                 he_oper_params |= u32_encode_bits(1,
3171                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3172
3173         he_oper = (struct ieee80211_he_operation *)pos;
3174         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3175
3176         /* don't require special HE peer rates */
3177         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3178         pos += sizeof(struct ieee80211_he_operation);
3179
3180         if (chandef->chan->band != NL80211_BAND_6GHZ)
3181                 goto out;
3182
3183         /* TODO add VHT operational */
3184         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3185         he_6ghz_op->minrate = 6; /* 6 Mbps */
3186         he_6ghz_op->primary =
3187                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3188         he_6ghz_op->ccfs0 =
3189                 ieee80211_frequency_to_channel(chandef->center_freq1);
3190         if (chandef->center_freq2)
3191                 he_6ghz_op->ccfs1 =
3192                         ieee80211_frequency_to_channel(chandef->center_freq2);
3193         else
3194                 he_6ghz_op->ccfs1 = 0;
3195
3196         switch (chandef->width) {
3197         case NL80211_CHAN_WIDTH_160:
3198                 /* Convert 160 MHz channel width to new style as interop
3199                  * workaround.
3200                  */
3201                 he_6ghz_op->control =
3202                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3203                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3204                 if (chandef->chan->center_freq < chandef->center_freq1)
3205                         he_6ghz_op->ccfs0 -= 8;
3206                 else
3207                         he_6ghz_op->ccfs0 += 8;
3208                 fallthrough;
3209         case NL80211_CHAN_WIDTH_80P80:
3210                 he_6ghz_op->control =
3211                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3212                 break;
3213         case NL80211_CHAN_WIDTH_80:
3214                 he_6ghz_op->control =
3215                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3216                 break;
3217         case NL80211_CHAN_WIDTH_40:
3218                 he_6ghz_op->control =
3219                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3220                 break;
3221         default:
3222                 he_6ghz_op->control =
3223                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3224                 break;
3225         }
3226
3227         pos += sizeof(struct ieee80211_he_6ghz_oper);
3228
3229 out:
3230         return pos;
3231 }
3232
3233 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3234                                struct cfg80211_chan_def *chandef)
3235 {
3236         enum nl80211_channel_type channel_type;
3237
3238         if (!ht_oper)
3239                 return false;
3240
3241         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3242         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3243                 channel_type = NL80211_CHAN_HT20;
3244                 break;
3245         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3246                 channel_type = NL80211_CHAN_HT40PLUS;
3247                 break;
3248         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3249                 channel_type = NL80211_CHAN_HT40MINUS;
3250                 break;
3251         default:
3252                 channel_type = NL80211_CHAN_NO_HT;
3253                 return false;
3254         }
3255
3256         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3257         return true;
3258 }
3259
3260 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3261                                 const struct ieee80211_vht_operation *oper,
3262                                 const struct ieee80211_ht_operation *htop,
3263                                 struct cfg80211_chan_def *chandef)
3264 {
3265         struct cfg80211_chan_def new = *chandef;
3266         int cf0, cf1;
3267         int ccfs0, ccfs1, ccfs2;
3268         int ccf0, ccf1;
3269         u32 vht_cap;
3270         bool support_80_80 = false;
3271         bool support_160 = false;
3272         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3273                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3274         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3275                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3276
3277         if (!oper || !htop)
3278                 return false;
3279
3280         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3281         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3282                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3283         support_80_80 = ((vht_cap &
3284                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3285                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3286                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3287                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3288                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3289         ccfs0 = oper->center_freq_seg0_idx;
3290         ccfs1 = oper->center_freq_seg1_idx;
3291         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3292                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3293                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3294
3295         ccf0 = ccfs0;
3296
3297         /* if not supported, parse as though we didn't understand it */
3298         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3299                 ext_nss_bw_supp = 0;
3300
3301         /*
3302          * Cf. IEEE 802.11 Table 9-250
3303          *
3304          * We really just consider that because it's inefficient to connect
3305          * at a higher bandwidth than we'll actually be able to use.
3306          */
3307         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3308         default:
3309         case 0x00:
3310                 ccf1 = 0;
3311                 support_160 = false;
3312                 support_80_80 = false;
3313                 break;
3314         case 0x01:
3315                 support_80_80 = false;
3316                 fallthrough;
3317         case 0x02:
3318         case 0x03:
3319                 ccf1 = ccfs2;
3320                 break;
3321         case 0x10:
3322                 ccf1 = ccfs1;
3323                 break;
3324         case 0x11:
3325         case 0x12:
3326                 if (!ccfs1)
3327                         ccf1 = ccfs2;
3328                 else
3329                         ccf1 = ccfs1;
3330                 break;
3331         case 0x13:
3332         case 0x20:
3333         case 0x23:
3334                 ccf1 = ccfs1;
3335                 break;
3336         }
3337
3338         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3339         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3340
3341         switch (oper->chan_width) {
3342         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3343                 /* just use HT information directly */
3344                 break;
3345         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3346                 new.width = NL80211_CHAN_WIDTH_80;
3347                 new.center_freq1 = cf0;
3348                 /* If needed, adjust based on the newer interop workaround. */
3349                 if (ccf1) {
3350                         unsigned int diff;
3351
3352                         diff = abs(ccf1 - ccf0);
3353                         if ((diff == 8) && support_160) {
3354                                 new.width = NL80211_CHAN_WIDTH_160;
3355                                 new.center_freq1 = cf1;
3356                         } else if ((diff > 8) && support_80_80) {
3357                                 new.width = NL80211_CHAN_WIDTH_80P80;
3358                                 new.center_freq2 = cf1;
3359                         }
3360                 }
3361                 break;
3362         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3363                 /* deprecated encoding */
3364                 new.width = NL80211_CHAN_WIDTH_160;
3365                 new.center_freq1 = cf0;
3366                 break;
3367         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3368                 /* deprecated encoding */
3369                 new.width = NL80211_CHAN_WIDTH_80P80;
3370                 new.center_freq1 = cf0;
3371                 new.center_freq2 = cf1;
3372                 break;
3373         default:
3374                 return false;
3375         }
3376
3377         if (!cfg80211_chandef_valid(&new))
3378                 return false;
3379
3380         *chandef = new;
3381         return true;
3382 }
3383
3384 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3385                                     const struct ieee80211_he_operation *he_oper,
3386                                     struct cfg80211_chan_def *chandef)
3387 {
3388         struct ieee80211_local *local = sdata->local;
3389         struct ieee80211_supported_band *sband;
3390         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3391         const struct ieee80211_sta_he_cap *he_cap;
3392         struct cfg80211_chan_def he_chandef = *chandef;
3393         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3394         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3395         bool support_80_80, support_160;
3396         u8 he_phy_cap;
3397         u32 freq;
3398
3399         if (chandef->chan->band != NL80211_BAND_6GHZ)
3400                 return true;
3401
3402         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3403
3404         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3405         if (!he_cap) {
3406                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3407                 return false;
3408         }
3409
3410         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3411         support_160 =
3412                 he_phy_cap &
3413                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3414         support_80_80 =
3415                 he_phy_cap &
3416                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3417
3418         if (!he_oper) {
3419                 sdata_info(sdata,
3420                            "HE is not advertised on (on %d MHz), expect issues\n",
3421                            chandef->chan->center_freq);
3422                 return false;
3423         }
3424
3425         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3426
3427         if (!he_6ghz_oper) {
3428                 sdata_info(sdata,
3429                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3430                            chandef->chan->center_freq);
3431                 return false;
3432         }
3433
3434         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3435                                               NL80211_BAND_6GHZ);
3436         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3437
3438         switch (u8_get_bits(he_6ghz_oper->control,
3439                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3440         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3441                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3442                 break;
3443         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3444                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3445                 break;
3446         default:
3447                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3448                 break;
3449         }
3450
3451         switch (u8_get_bits(he_6ghz_oper->control,
3452                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3453         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3454                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3455                 break;
3456         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3457                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3458                 break;
3459         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3460                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3461                 break;
3462         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3463                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3464                 if (!he_6ghz_oper->ccfs1)
3465                         break;
3466                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3467                         if (support_160)
3468                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3469                 } else {
3470                         if (support_80_80)
3471                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3472                 }
3473                 break;
3474         }
3475
3476         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3477                 he_chandef.center_freq1 =
3478                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3479                                                        NL80211_BAND_6GHZ);
3480         } else {
3481                 he_chandef.center_freq1 =
3482                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3483                                                        NL80211_BAND_6GHZ);
3484                 if (support_80_80 || support_160)
3485                         he_chandef.center_freq2 =
3486                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3487                                                                NL80211_BAND_6GHZ);
3488         }
3489
3490         if (!cfg80211_chandef_valid(&he_chandef)) {
3491                 sdata_info(sdata,
3492                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3493                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3494                            he_chandef.width,
3495                            he_chandef.center_freq1,
3496                            he_chandef.center_freq2);
3497                 return false;
3498         }
3499
3500         *chandef = he_chandef;
3501
3502         return true;
3503 }
3504
3505 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3506                                 struct cfg80211_chan_def *chandef)
3507 {
3508         u32 oper_freq;
3509
3510         if (!oper)
3511                 return false;
3512
3513         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3514         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3515                 chandef->width = NL80211_CHAN_WIDTH_1;
3516                 break;
3517         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3518                 chandef->width = NL80211_CHAN_WIDTH_2;
3519                 break;
3520         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3521                 chandef->width = NL80211_CHAN_WIDTH_4;
3522                 break;
3523         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3524                 chandef->width = NL80211_CHAN_WIDTH_8;
3525                 break;
3526         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3527                 chandef->width = NL80211_CHAN_WIDTH_16;
3528                 break;
3529         default:
3530                 return false;
3531         }
3532
3533         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3534                                                   NL80211_BAND_S1GHZ);
3535         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3536         chandef->freq1_offset = oper_freq % 1000;
3537
3538         return true;
3539 }
3540
3541 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3542                              const struct ieee80211_supported_band *sband,
3543                              const u8 *srates, int srates_len, u32 *rates)
3544 {
3545         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3546         int shift = ieee80211_chandef_get_shift(chandef);
3547         struct ieee80211_rate *br;
3548         int brate, rate, i, j, count = 0;
3549
3550         *rates = 0;
3551
3552         for (i = 0; i < srates_len; i++) {
3553                 rate = srates[i] & 0x7f;
3554
3555                 for (j = 0; j < sband->n_bitrates; j++) {
3556                         br = &sband->bitrates[j];
3557                         if ((rate_flags & br->flags) != rate_flags)
3558                                 continue;
3559
3560                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3561                         if (brate == rate) {
3562                                 *rates |= BIT(j);
3563                                 count++;
3564                                 break;
3565                         }
3566                 }
3567         }
3568         return count;
3569 }
3570
3571 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3572                             struct sk_buff *skb, bool need_basic,
3573                             enum nl80211_band band)
3574 {
3575         struct ieee80211_local *local = sdata->local;
3576         struct ieee80211_supported_band *sband;
3577         int rate, shift;
3578         u8 i, rates, *pos;
3579         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3580         u32 rate_flags;
3581
3582         shift = ieee80211_vif_get_shift(&sdata->vif);
3583         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3584         sband = local->hw.wiphy->bands[band];
3585         rates = 0;
3586         for (i = 0; i < sband->n_bitrates; i++) {
3587                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3588                         continue;
3589                 rates++;
3590         }
3591         if (rates > 8)
3592                 rates = 8;
3593
3594         if (skb_tailroom(skb) < rates + 2)
3595                 return -ENOMEM;
3596
3597         pos = skb_put(skb, rates + 2);
3598         *pos++ = WLAN_EID_SUPP_RATES;
3599         *pos++ = rates;
3600         for (i = 0; i < rates; i++) {
3601                 u8 basic = 0;
3602                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3603                         continue;
3604
3605                 if (need_basic && basic_rates & BIT(i))
3606                         basic = 0x80;
3607                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3608                                     5 * (1 << shift));
3609                 *pos++ = basic | (u8) rate;
3610         }
3611
3612         return 0;
3613 }
3614
3615 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3616                                 struct sk_buff *skb, bool need_basic,
3617                                 enum nl80211_band band)
3618 {
3619         struct ieee80211_local *local = sdata->local;
3620         struct ieee80211_supported_band *sband;
3621         int rate, shift;
3622         u8 i, exrates, *pos;
3623         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3624         u32 rate_flags;
3625
3626         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3627         shift = ieee80211_vif_get_shift(&sdata->vif);
3628
3629         sband = local->hw.wiphy->bands[band];
3630         exrates = 0;
3631         for (i = 0; i < sband->n_bitrates; i++) {
3632                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3633                         continue;
3634                 exrates++;
3635         }
3636
3637         if (exrates > 8)
3638                 exrates -= 8;
3639         else
3640                 exrates = 0;
3641
3642         if (skb_tailroom(skb) < exrates + 2)
3643                 return -ENOMEM;
3644
3645         if (exrates) {
3646                 pos = skb_put(skb, exrates + 2);
3647                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3648                 *pos++ = exrates;
3649                 for (i = 8; i < sband->n_bitrates; i++) {
3650                         u8 basic = 0;
3651                         if ((rate_flags & sband->bitrates[i].flags)
3652                             != rate_flags)
3653                                 continue;
3654                         if (need_basic && basic_rates & BIT(i))
3655                                 basic = 0x80;
3656                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3657                                             5 * (1 << shift));
3658                         *pos++ = basic | (u8) rate;
3659                 }
3660         }
3661         return 0;
3662 }
3663
3664 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3665 {
3666         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3667         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3668
3669         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3670                 /* non-managed type inferfaces */
3671                 return 0;
3672         }
3673         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3674 }
3675 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3676
3677 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3678 {
3679         if (!mcs)
3680                 return 1;
3681
3682         /* TODO: consider rx_highest */
3683
3684         if (mcs->rx_mask[3])
3685                 return 4;
3686         if (mcs->rx_mask[2])
3687                 return 3;
3688         if (mcs->rx_mask[1])
3689                 return 2;
3690         return 1;
3691 }
3692
3693 /**
3694  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3695  * @local: mac80211 hw info struct
3696  * @status: RX status
3697  * @mpdu_len: total MPDU length (including FCS)
3698  * @mpdu_offset: offset into MPDU to calculate timestamp at
3699  *
3700  * This function calculates the RX timestamp at the given MPDU offset, taking
3701  * into account what the RX timestamp was. An offset of 0 will just normalize
3702  * the timestamp to TSF at beginning of MPDU reception.
3703  */
3704 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3705                                      struct ieee80211_rx_status *status,
3706                                      unsigned int mpdu_len,
3707                                      unsigned int mpdu_offset)
3708 {
3709         u64 ts = status->mactime;
3710         struct rate_info ri;
3711         u16 rate;
3712         u8 n_ltf;
3713
3714         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3715                 return 0;
3716
3717         memset(&ri, 0, sizeof(ri));
3718
3719         ri.bw = status->bw;
3720
3721         /* Fill cfg80211 rate info */
3722         switch (status->encoding) {
3723         case RX_ENC_HE:
3724                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3725                 ri.mcs = status->rate_idx;
3726                 ri.nss = status->nss;
3727                 ri.he_ru_alloc = status->he_ru;
3728                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3729                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3730
3731                 /*
3732                  * See P802.11ax_D6.0, section 27.3.4 for
3733                  * VHT PPDU format.
3734                  */
3735                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3736                         mpdu_offset += 2;
3737                         ts += 36;
3738
3739                         /*
3740                          * TODO:
3741                          * For HE MU PPDU, add the HE-SIG-B.
3742                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3743                          * For HE TB PPDU, add 4us for the HE-STF.
3744                          * Add the HE-LTF durations - variable.
3745                          */
3746                 }
3747
3748                 break;
3749         case RX_ENC_HT:
3750                 ri.mcs = status->rate_idx;
3751                 ri.flags |= RATE_INFO_FLAGS_MCS;
3752                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3753                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3754
3755                 /*
3756                  * See P802.11REVmd_D3.0, section 19.3.2 for
3757                  * HT PPDU format.
3758                  */
3759                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3760                         mpdu_offset += 2;
3761                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3762                                 ts += 24;
3763                         else
3764                                 ts += 32;
3765
3766                         /*
3767                          * Add Data HT-LTFs per streams
3768                          * TODO: add Extension HT-LTFs, 4us per LTF
3769                          */
3770                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3771                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3772                         ts += n_ltf * 4;
3773                 }
3774
3775                 break;
3776         case RX_ENC_VHT:
3777                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3778                 ri.mcs = status->rate_idx;
3779                 ri.nss = status->nss;
3780                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3781                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3782
3783                 /*
3784                  * See P802.11REVmd_D3.0, section 21.3.2 for
3785                  * VHT PPDU format.
3786                  */
3787                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3788                         mpdu_offset += 2;
3789                         ts += 36;
3790
3791                         /*
3792                          * Add VHT-LTFs per streams
3793                          */
3794                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3795                                 ri.nss + 1 : ri.nss;
3796                         ts += 4 * n_ltf;
3797                 }
3798
3799                 break;
3800         default:
3801                 WARN_ON(1);
3802                 fallthrough;
3803         case RX_ENC_LEGACY: {
3804                 struct ieee80211_supported_band *sband;
3805                 int shift = 0;
3806                 int bitrate;
3807
3808                 switch (status->bw) {
3809                 case RATE_INFO_BW_10:
3810                         shift = 1;
3811                         break;
3812                 case RATE_INFO_BW_5:
3813                         shift = 2;
3814                         break;
3815                 }
3816
3817                 sband = local->hw.wiphy->bands[status->band];
3818                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3819                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3820
3821                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3822                         if (status->band == NL80211_BAND_5GHZ) {
3823                                 ts += 20 << shift;
3824                                 mpdu_offset += 2;
3825                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3826                                 ts += 96;
3827                         } else {
3828                                 ts += 192;
3829                         }
3830                 }
3831                 break;
3832                 }
3833         }
3834
3835         rate = cfg80211_calculate_bitrate(&ri);
3836         if (WARN_ONCE(!rate,
3837                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3838                       (unsigned long long)status->flag, status->rate_idx,
3839                       status->nss))
3840                 return 0;
3841
3842         /* rewind from end of MPDU */
3843         if (status->flag & RX_FLAG_MACTIME_END)
3844                 ts -= mpdu_len * 8 * 10 / rate;
3845
3846         ts += mpdu_offset * 8 * 10 / rate;
3847
3848         return ts;
3849 }
3850
3851 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3852 {
3853         struct ieee80211_sub_if_data *sdata;
3854         struct cfg80211_chan_def chandef;
3855
3856         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3857         lockdep_assert_wiphy(local->hw.wiphy);
3858
3859         mutex_lock(&local->mtx);
3860         list_for_each_entry(sdata, &local->interfaces, list) {
3861                 /* it might be waiting for the local->mtx, but then
3862                  * by the time it gets it, sdata->wdev.cac_started
3863                  * will no longer be true
3864                  */
3865                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3866
3867                 if (sdata->wdev.cac_started) {
3868                         chandef = sdata->vif.bss_conf.chandef;
3869                         ieee80211_vif_release_channel(sdata);
3870                         cfg80211_cac_event(sdata->dev,
3871                                            &chandef,
3872                                            NL80211_RADAR_CAC_ABORTED,
3873                                            GFP_KERNEL);
3874                 }
3875         }
3876         mutex_unlock(&local->mtx);
3877 }
3878
3879 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3880 {
3881         struct ieee80211_local *local =
3882                 container_of(work, struct ieee80211_local, radar_detected_work);
3883         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3884         struct ieee80211_chanctx *ctx;
3885         int num_chanctx = 0;
3886
3887         mutex_lock(&local->chanctx_mtx);
3888         list_for_each_entry(ctx, &local->chanctx_list, list) {
3889                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3890                         continue;
3891
3892                 num_chanctx++;
3893                 chandef = ctx->conf.def;
3894         }
3895         mutex_unlock(&local->chanctx_mtx);
3896
3897         wiphy_lock(local->hw.wiphy);
3898         ieee80211_dfs_cac_cancel(local);
3899         wiphy_unlock(local->hw.wiphy);
3900
3901         if (num_chanctx > 1)
3902                 /* XXX: multi-channel is not supported yet */
3903                 WARN_ON(1);
3904         else
3905                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3906 }
3907
3908 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3909 {
3910         struct ieee80211_local *local = hw_to_local(hw);
3911
3912         trace_api_radar_detected(local);
3913
3914         schedule_work(&local->radar_detected_work);
3915 }
3916 EXPORT_SYMBOL(ieee80211_radar_detected);
3917
3918 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3919 {
3920         u32 ret;
3921         int tmp;
3922
3923         switch (c->width) {
3924         case NL80211_CHAN_WIDTH_20:
3925                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3926                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3927                 break;
3928         case NL80211_CHAN_WIDTH_40:
3929                 c->width = NL80211_CHAN_WIDTH_20;
3930                 c->center_freq1 = c->chan->center_freq;
3931                 ret = IEEE80211_STA_DISABLE_40MHZ |
3932                       IEEE80211_STA_DISABLE_VHT;
3933                 break;
3934         case NL80211_CHAN_WIDTH_80:
3935                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3936                 /* n_P40 */
3937                 tmp /= 2;
3938                 /* freq_P40 */
3939                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3940                 c->width = NL80211_CHAN_WIDTH_40;
3941                 ret = IEEE80211_STA_DISABLE_VHT;
3942                 break;
3943         case NL80211_CHAN_WIDTH_80P80:
3944                 c->center_freq2 = 0;
3945                 c->width = NL80211_CHAN_WIDTH_80;
3946                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3947                       IEEE80211_STA_DISABLE_160MHZ;
3948                 break;
3949         case NL80211_CHAN_WIDTH_160:
3950                 /* n_P20 */
3951                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3952                 /* n_P80 */
3953                 tmp /= 4;
3954                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3955                 c->width = NL80211_CHAN_WIDTH_80;
3956                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3957                       IEEE80211_STA_DISABLE_160MHZ;
3958                 break;
3959         default:
3960         case NL80211_CHAN_WIDTH_20_NOHT:
3961                 WARN_ON_ONCE(1);
3962                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3963                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3964                 break;
3965         case NL80211_CHAN_WIDTH_1:
3966         case NL80211_CHAN_WIDTH_2:
3967         case NL80211_CHAN_WIDTH_4:
3968         case NL80211_CHAN_WIDTH_8:
3969         case NL80211_CHAN_WIDTH_16:
3970         case NL80211_CHAN_WIDTH_5:
3971         case NL80211_CHAN_WIDTH_10:
3972                 WARN_ON_ONCE(1);
3973                 /* keep c->width */
3974                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3975                 break;
3976         }
3977
3978         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3979
3980         return ret;
3981 }
3982
3983 /*
3984  * Returns true if smps_mode_new is strictly more restrictive than
3985  * smps_mode_old.
3986  */
3987 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3988                                    enum ieee80211_smps_mode smps_mode_new)
3989 {
3990         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3991                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3992                 return false;
3993
3994         switch (smps_mode_old) {
3995         case IEEE80211_SMPS_STATIC:
3996                 return false;
3997         case IEEE80211_SMPS_DYNAMIC:
3998                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3999         case IEEE80211_SMPS_OFF:
4000                 return smps_mode_new != IEEE80211_SMPS_OFF;
4001         default:
4002                 WARN_ON(1);
4003         }
4004
4005         return false;
4006 }
4007
4008 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4009                               struct cfg80211_csa_settings *csa_settings)
4010 {
4011         struct sk_buff *skb;
4012         struct ieee80211_mgmt *mgmt;
4013         struct ieee80211_local *local = sdata->local;
4014         int freq;
4015         int hdr_len = offsetofend(struct ieee80211_mgmt,
4016                                   u.action.u.chan_switch);
4017         u8 *pos;
4018
4019         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4020             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4021                 return -EOPNOTSUPP;
4022
4023         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4024                             5 + /* channel switch announcement element */
4025                             3 + /* secondary channel offset element */
4026                             5 + /* wide bandwidth channel switch announcement */
4027                             8); /* mesh channel switch parameters element */
4028         if (!skb)
4029                 return -ENOMEM;
4030
4031         skb_reserve(skb, local->tx_headroom);
4032         mgmt = skb_put_zero(skb, hdr_len);
4033         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4034                                           IEEE80211_STYPE_ACTION);
4035
4036         eth_broadcast_addr(mgmt->da);
4037         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4038         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4039                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4040         } else {
4041                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4042                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4043         }
4044         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4045         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4046         pos = skb_put(skb, 5);
4047         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4048         *pos++ = 3;                                             /* IE length */
4049         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4050         freq = csa_settings->chandef.chan->center_freq;
4051         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4052         *pos++ = csa_settings->count;                           /* count */
4053
4054         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4055                 enum nl80211_channel_type ch_type;
4056
4057                 skb_put(skb, 3);
4058                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4059                 *pos++ = 1;                                     /* IE length */
4060                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4061                 if (ch_type == NL80211_CHAN_HT40PLUS)
4062                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4063                 else
4064                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4065         }
4066
4067         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4068                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4069
4070                 skb_put(skb, 8);
4071                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4072                 *pos++ = 6;                                     /* IE length */
4073                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4074                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4075                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4076                 *pos++ |= csa_settings->block_tx ?
4077                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4078                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4079                 pos += 2;
4080                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4081                 pos += 2;
4082         }
4083
4084         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4085             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4086             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4087                 skb_put(skb, 5);
4088                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4089         }
4090
4091         ieee80211_tx_skb(sdata, skb);
4092         return 0;
4093 }
4094
4095 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4096 {
4097         return !(cs == NULL || cs->cipher == 0 ||
4098                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4099                  cs->hdr_len <= cs->key_idx_off ||
4100                  cs->key_idx_shift > 7 ||
4101                  cs->key_idx_mask == 0);
4102 }
4103
4104 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4105 {
4106         int i;
4107
4108         /* Ensure we have enough iftype bitmap space for all iftype values */
4109         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4110
4111         for (i = 0; i < n; i++)
4112                 if (!ieee80211_cs_valid(&cs[i]))
4113                         return false;
4114
4115         return true;
4116 }
4117
4118 const struct ieee80211_cipher_scheme *
4119 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4120                  enum nl80211_iftype iftype)
4121 {
4122         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4123         int n = local->hw.n_cipher_schemes;
4124         int i;
4125         const struct ieee80211_cipher_scheme *cs = NULL;
4126
4127         for (i = 0; i < n; i++) {
4128                 if (l[i].cipher == cipher) {
4129                         cs = &l[i];
4130                         break;
4131                 }
4132         }
4133
4134         if (!cs || !(cs->iftype & BIT(iftype)))
4135                 return NULL;
4136
4137         return cs;
4138 }
4139
4140 int ieee80211_cs_headroom(struct ieee80211_local *local,
4141                           struct cfg80211_crypto_settings *crypto,
4142                           enum nl80211_iftype iftype)
4143 {
4144         const struct ieee80211_cipher_scheme *cs;
4145         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4146         int i;
4147
4148         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4149                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4150                                       iftype);
4151
4152                 if (cs && headroom < cs->hdr_len)
4153                         headroom = cs->hdr_len;
4154         }
4155
4156         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4157         if (cs && headroom < cs->hdr_len)
4158                 headroom = cs->hdr_len;
4159
4160         return headroom;
4161 }
4162
4163 static bool
4164 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4165 {
4166         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4167         int skip;
4168
4169         if (end > 0)
4170                 return false;
4171
4172         /* One shot NOA  */
4173         if (data->count[i] == 1)
4174                 return false;
4175
4176         if (data->desc[i].interval == 0)
4177                 return false;
4178
4179         /* End time is in the past, check for repetitions */
4180         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4181         if (data->count[i] < 255) {
4182                 if (data->count[i] <= skip) {
4183                         data->count[i] = 0;
4184                         return false;
4185                 }
4186
4187                 data->count[i] -= skip;
4188         }
4189
4190         data->desc[i].start += skip * data->desc[i].interval;
4191
4192         return true;
4193 }
4194
4195 static bool
4196 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4197                              s32 *offset)
4198 {
4199         bool ret = false;
4200         int i;
4201
4202         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4203                 s32 cur;
4204
4205                 if (!data->count[i])
4206                         continue;
4207
4208                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4209                         ret = true;
4210
4211                 cur = data->desc[i].start - tsf;
4212                 if (cur > *offset)
4213                         continue;
4214
4215                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4216                 if (cur > *offset)
4217                         *offset = cur;
4218         }
4219
4220         return ret;
4221 }
4222
4223 static u32
4224 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4225 {
4226         s32 offset = 0;
4227         int tries = 0;
4228         /*
4229          * arbitrary limit, used to avoid infinite loops when combined NoA
4230          * descriptors cover the full time period.
4231          */
4232         int max_tries = 5;
4233
4234         ieee80211_extend_absent_time(data, tsf, &offset);
4235         do {
4236                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4237                         break;
4238
4239                 tries++;
4240         } while (tries < max_tries);
4241
4242         return offset;
4243 }
4244
4245 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4246 {
4247         u32 next_offset = BIT(31) - 1;
4248         int i;
4249
4250         data->absent = 0;
4251         data->has_next_tsf = false;
4252         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4253                 s32 start;
4254
4255                 if (!data->count[i])
4256                         continue;
4257
4258                 ieee80211_extend_noa_desc(data, tsf, i);
4259                 start = data->desc[i].start - tsf;
4260                 if (start <= 0)
4261                         data->absent |= BIT(i);
4262
4263                 if (next_offset > start)
4264                         next_offset = start;
4265
4266                 data->has_next_tsf = true;
4267         }
4268
4269         if (data->absent)
4270                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4271
4272         data->next_tsf = tsf + next_offset;
4273 }
4274 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4275
4276 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4277                             struct ieee80211_noa_data *data, u32 tsf)
4278 {
4279         int ret = 0;
4280         int i;
4281
4282         memset(data, 0, sizeof(*data));
4283
4284         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4285                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4286
4287                 if (!desc->count || !desc->duration)
4288                         continue;
4289
4290                 data->count[i] = desc->count;
4291                 data->desc[i].start = le32_to_cpu(desc->start_time);
4292                 data->desc[i].duration = le32_to_cpu(desc->duration);
4293                 data->desc[i].interval = le32_to_cpu(desc->interval);
4294
4295                 if (data->count[i] > 1 &&
4296                     data->desc[i].interval < data->desc[i].duration)
4297                         continue;
4298
4299                 ieee80211_extend_noa_desc(data, tsf, i);
4300                 ret++;
4301         }
4302
4303         if (ret)
4304                 ieee80211_update_p2p_noa(data, tsf);
4305
4306         return ret;
4307 }
4308 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4309
4310 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4311                            struct ieee80211_sub_if_data *sdata)
4312 {
4313         u64 tsf = drv_get_tsf(local, sdata);
4314         u64 dtim_count = 0;
4315         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4316         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4317         struct ps_data *ps;
4318         u8 bcns_from_dtim;
4319
4320         if (tsf == -1ULL || !beacon_int || !dtim_period)
4321                 return;
4322
4323         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4324             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4325                 if (!sdata->bss)
4326                         return;
4327
4328                 ps = &sdata->bss->ps;
4329         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4330                 ps = &sdata->u.mesh.ps;
4331         } else {
4332                 return;
4333         }
4334
4335         /*
4336          * actually finds last dtim_count, mac80211 will update in
4337          * __beacon_add_tim().
4338          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4339          */
4340         do_div(tsf, beacon_int);
4341         bcns_from_dtim = do_div(tsf, dtim_period);
4342         /* just had a DTIM */
4343         if (!bcns_from_dtim)
4344                 dtim_count = 0;
4345         else
4346                 dtim_count = dtim_period - bcns_from_dtim;
4347
4348         ps->dtim_count = dtim_count;
4349 }
4350
4351 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4352                                          struct ieee80211_chanctx *ctx)
4353 {
4354         struct ieee80211_sub_if_data *sdata;
4355         u8 radar_detect = 0;
4356
4357         lockdep_assert_held(&local->chanctx_mtx);
4358
4359         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4360                 return 0;
4361
4362         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4363                 if (sdata->reserved_radar_required)
4364                         radar_detect |= BIT(sdata->reserved_chandef.width);
4365
4366         /*
4367          * An in-place reservation context should not have any assigned vifs
4368          * until it replaces the other context.
4369          */
4370         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4371                 !list_empty(&ctx->assigned_vifs));
4372
4373         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4374                 if (sdata->radar_required)
4375                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4376
4377         return radar_detect;
4378 }
4379
4380 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4381                                  const struct cfg80211_chan_def *chandef,
4382                                  enum ieee80211_chanctx_mode chanmode,
4383                                  u8 radar_detect)
4384 {
4385         struct ieee80211_local *local = sdata->local;
4386         struct ieee80211_sub_if_data *sdata_iter;
4387         enum nl80211_iftype iftype = sdata->wdev.iftype;
4388         struct ieee80211_chanctx *ctx;
4389         int total = 1;
4390         struct iface_combination_params params = {
4391                 .radar_detect = radar_detect,
4392         };
4393
4394         lockdep_assert_held(&local->chanctx_mtx);
4395
4396         if (WARN_ON(hweight32(radar_detect) > 1))
4397                 return -EINVAL;
4398
4399         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4400                     !chandef->chan))
4401                 return -EINVAL;
4402
4403         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4404                 return -EINVAL;
4405
4406         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4407             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4408                 /*
4409                  * always passing this is harmless, since it'll be the
4410                  * same value that cfg80211 finds if it finds the same
4411                  * interface ... and that's always allowed
4412                  */
4413                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4414         }
4415
4416         /* Always allow software iftypes */
4417         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4418                 if (radar_detect)
4419                         return -EINVAL;
4420                 return 0;
4421         }
4422
4423         if (chandef)
4424                 params.num_different_channels = 1;
4425
4426         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4427                 params.iftype_num[iftype] = 1;
4428
4429         list_for_each_entry(ctx, &local->chanctx_list, list) {
4430                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4431                         continue;
4432                 params.radar_detect |=
4433                         ieee80211_chanctx_radar_detect(local, ctx);
4434                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4435                         params.num_different_channels++;
4436                         continue;
4437                 }
4438                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4439                     cfg80211_chandef_compatible(chandef,
4440                                                 &ctx->conf.def))
4441                         continue;
4442                 params.num_different_channels++;
4443         }
4444
4445         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4446                 struct wireless_dev *wdev_iter;
4447
4448                 wdev_iter = &sdata_iter->wdev;
4449
4450                 if (sdata_iter == sdata ||
4451                     !ieee80211_sdata_running(sdata_iter) ||
4452                     cfg80211_iftype_allowed(local->hw.wiphy,
4453                                             wdev_iter->iftype, 0, 1))
4454                         continue;
4455
4456                 params.iftype_num[wdev_iter->iftype]++;
4457                 total++;
4458         }
4459
4460         if (total == 1 && !params.radar_detect)
4461                 return 0;
4462
4463         return cfg80211_check_combinations(local->hw.wiphy, &params);
4464 }
4465
4466 static void
4467 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4468                          void *data)
4469 {
4470         u32 *max_num_different_channels = data;
4471
4472         *max_num_different_channels = max(*max_num_different_channels,
4473                                           c->num_different_channels);
4474 }
4475
4476 int ieee80211_max_num_channels(struct ieee80211_local *local)
4477 {
4478         struct ieee80211_sub_if_data *sdata;
4479         struct ieee80211_chanctx *ctx;
4480         u32 max_num_different_channels = 1;
4481         int err;
4482         struct iface_combination_params params = {0};
4483
4484         lockdep_assert_held(&local->chanctx_mtx);
4485
4486         list_for_each_entry(ctx, &local->chanctx_list, list) {
4487                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4488                         continue;
4489
4490                 params.num_different_channels++;
4491
4492                 params.radar_detect |=
4493                         ieee80211_chanctx_radar_detect(local, ctx);
4494         }
4495
4496         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4497                 params.iftype_num[sdata->wdev.iftype]++;
4498
4499         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4500                                          ieee80211_iter_max_chans,
4501                                          &max_num_different_channels);
4502         if (err < 0)
4503                 return err;
4504
4505         return max_num_different_channels;
4506 }
4507
4508 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4509                                 struct ieee80211_sta_s1g_cap *caps,
4510                                 struct sk_buff *skb)
4511 {
4512         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4513         struct ieee80211_s1g_cap s1g_capab;
4514         u8 *pos;
4515         int i;
4516
4517         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4518                 return;
4519
4520         if (!caps->s1g)
4521                 return;
4522
4523         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4524         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4525
4526         /* override the capability info */
4527         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4528                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4529
4530                 s1g_capab.capab_info[i] &= ~mask;
4531                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4532         }
4533
4534         /* then MCS and NSS set */
4535         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4536                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4537
4538                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4539                 s1g_capab.supp_mcs_nss[i] |=
4540                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4541         }
4542
4543         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4544         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4545         *pos++ = sizeof(s1g_capab);
4546
4547         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4548 }
4549
4550 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4551                                   struct sk_buff *skb)
4552 {
4553         u8 *pos = skb_put(skb, 3);
4554
4555         *pos++ = WLAN_EID_AID_REQUEST;
4556         *pos++ = 1;
4557         *pos++ = 0;
4558 }
4559
4560 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4561 {
4562         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4563         *buf++ = 7; /* len */
4564         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4565         *buf++ = 0x50;
4566         *buf++ = 0xf2;
4567         *buf++ = 2; /* WME */
4568         *buf++ = 0; /* WME info */
4569         *buf++ = 1; /* WME ver */
4570         *buf++ = qosinfo; /* U-APSD no in use */
4571
4572         return buf;
4573 }
4574
4575 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4576                              unsigned long *frame_cnt,
4577                              unsigned long *byte_cnt)
4578 {
4579         struct txq_info *txqi = to_txq_info(txq);
4580         u32 frag_cnt = 0, frag_bytes = 0;
4581         struct sk_buff *skb;
4582
4583         skb_queue_walk(&txqi->frags, skb) {
4584                 frag_cnt++;
4585                 frag_bytes += skb->len;
4586         }
4587
4588         if (frame_cnt)
4589                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4590
4591         if (byte_cnt)
4592                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4593 }
4594 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4595
4596 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4597         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4598         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4599         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4600         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4601 };
4602
4603 u16 ieee80211_encode_usf(int listen_interval)
4604 {
4605         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4606         u16 ui, usf = 0;
4607
4608         /* find greatest USF */
4609         while (usf < IEEE80211_MAX_USF) {
4610                 if (listen_interval % listen_int_usf[usf + 1])
4611                         break;
4612                 usf += 1;
4613         }
4614         ui = listen_interval / listen_int_usf[usf];
4615
4616         /* error if there is a remainder. Should've been checked by user */
4617         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4618         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4619                           FIELD_PREP(LISTEN_INT_UI, ui);
4620
4621         return (u16) listen_interval;
4622 }