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(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         mutex_lock(&local->sta_mtx);
 873         __iterate_stations(local, iterator, data);
 874         mutex_unlock(&local->sta_mtx);
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations);
 877
 878 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 879                         void (*iterator)(void *data,
 880                                          struct ieee80211_sta *sta),
 881                         void *data)
 882 {
 883         struct ieee80211_local *local = hw_to_local(hw);
 884
 885         rcu_read_lock();
 886         __iterate_stations(local, iterator, data);
 887         rcu_read_unlock();
 888 }
 889 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 890
 891 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 892 {
 893         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 894
 895         if (!ieee80211_sdata_running(sdata) ||
 896             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 897                 return NULL;
 898         return &sdata->vif;
 899 }
 900 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 901
 902 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 903 {
 904         if (!vif)
 905                 return NULL;
 906
 907         return &vif_to_sdata(vif)->wdev;
 908 }
 909 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 910
 911 /*
 912  * Nothing should have been stuffed into the workqueue during
 913  * the suspend->resume cycle. Since we can't check each caller
 914  * of this function if we are already quiescing / suspended,
 915  * check here and don't WARN since this can actually happen when
 916  * the rx path (for example) is racing against __ieee80211_suspend
 917  * and suspending / quiescing was set after the rx path checked
 918  * them.
 919  */
 920 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 921 {
 922         if (local->quiescing || (local->suspended && !local->resuming)) {
 923                 pr_warn("queueing ieee80211 work while going to suspend\n");
 924                 return false;
 925         }
 926
 927         return true;
 928 }
 929
 930 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_work(local->workqueue, work);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_work);
 940
 941 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 942                                   struct delayed_work *dwork,
 943                                   unsigned long delay)
 944 {
 945         struct ieee80211_local *local = hw_to_local(hw);
 946
 947         if (!ieee80211_can_queue_work(local))
 948                 return;
 949
 950         queue_delayed_work(local->workqueue, dwork, delay);
 951 }
 952 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 953
 954 static void ieee80211_parse_extension_element(u32 *crc,
 955                                               const struct element *elem,
 956                                               struct ieee802_11_elems *elems)
 957 {
 958         const void *data = elem->data + 1;
 959         u8 len;
 960
 961         if (!elem->datalen)
 962                 return;
 963
 964         len = elem->datalen - 1;
 965
 966         switch (elem->data[0]) {
 967         case WLAN_EID_EXT_HE_MU_EDCA:
 968                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 969                         elems->mu_edca_param_set = data;
 970                         if (crc)
 971                                 *crc = crc32_be(*crc, (void *)elem,
 972                                                 elem->datalen + 2);
 973                 }
 974                 break;
 975         case WLAN_EID_EXT_HE_CAPABILITY:
 976                 elems->he_cap = data;
 977                 elems->he_cap_len = len;
 978                 break;
 979         case WLAN_EID_EXT_HE_OPERATION:
 980                 if (len >= sizeof(*elems->he_operation) &&
 981                     len >= ieee80211_he_oper_size(data) - 1) {
 982                         if (crc)
 983                                 *crc = crc32_be(*crc, (void *)elem,
 984                                                 elem->datalen + 2);
 985                         elems->he_operation = data;
 986                 }
 987                 break;
 988         case WLAN_EID_EXT_UORA:
 989                 if (len >= 1)
 990                         elems->uora_element = data;
 991                 break;
 992         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 993                 if (len == 3)
 994                         elems->max_channel_switch_time = data;
 995                 break;
 996         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 997                 if (len >= sizeof(*elems->mbssid_config_ie))
 998                         elems->mbssid_config_ie = data;
 999                 break;
1000         case WLAN_EID_EXT_HE_SPR:
1001                 if (len >= sizeof(*elems->he_spr) &&
1002                     len >= ieee80211_he_spr_size(data))
1003                         elems->he_spr = data;
1004                 break;
1005         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1006                 if (len >= sizeof(*elems->he_6ghz_capa))
1007                         elems->he_6ghz_capa = data;
1008                 break;
1009         }
1010 }
1011
1012 static u32
1013 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1014                             struct ieee802_11_elems *elems,
1015                             u64 filter, u32 crc,
1016                             const struct element *check_inherit)
1017 {
1018         const struct element *elem;
1019         bool calc_crc = filter != 0;
1020         DECLARE_BITMAP(seen_elems, 256);
1021         const u8 *ie;
1022
1023         bitmap_zero(seen_elems, 256);
1024
1025         for_each_element(elem, start, len) {
1026                 bool elem_parse_failed;
1027                 u8 id = elem->id;
1028                 u8 elen = elem->datalen;
1029                 const u8 *pos = elem->data;
1030
1031                 if (check_inherit &&
1032                     !cfg80211_is_element_inherited(elem,
1033                                                    check_inherit))
1034                         continue;
1035
1036                 switch (id) {
1037                 case WLAN_EID_SSID:
1038                 case WLAN_EID_SUPP_RATES:
1039                 case WLAN_EID_FH_PARAMS:
1040                 case WLAN_EID_DS_PARAMS:
1041                 case WLAN_EID_CF_PARAMS:
1042                 case WLAN_EID_TIM:
1043                 case WLAN_EID_IBSS_PARAMS:
1044                 case WLAN_EID_CHALLENGE:
1045                 case WLAN_EID_RSN:
1046                 case WLAN_EID_ERP_INFO:
1047                 case WLAN_EID_EXT_SUPP_RATES:
1048                 case WLAN_EID_HT_CAPABILITY:
1049                 case WLAN_EID_HT_OPERATION:
1050                 case WLAN_EID_VHT_CAPABILITY:
1051                 case WLAN_EID_VHT_OPERATION:
1052                 case WLAN_EID_MESH_ID:
1053                 case WLAN_EID_MESH_CONFIG:
1054                 case WLAN_EID_PEER_MGMT:
1055                 case WLAN_EID_PREQ:
1056                 case WLAN_EID_PREP:
1057                 case WLAN_EID_PERR:
1058                 case WLAN_EID_RANN:
1059                 case WLAN_EID_CHANNEL_SWITCH:
1060                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1061                 case WLAN_EID_COUNTRY:
1062                 case WLAN_EID_PWR_CONSTRAINT:
1063                 case WLAN_EID_TIMEOUT_INTERVAL:
1064                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1065                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1066                 case WLAN_EID_CHAN_SWITCH_PARAM:
1067                 case WLAN_EID_EXT_CAPABILITY:
1068                 case WLAN_EID_CHAN_SWITCH_TIMING:
1069                 case WLAN_EID_LINK_ID:
1070                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1071                 case WLAN_EID_RSNX:
1072                 case WLAN_EID_S1G_BCN_COMPAT:
1073                 case WLAN_EID_S1G_CAPABILITIES:
1074                 case WLAN_EID_S1G_OPERATION:
1075                 case WLAN_EID_AID_RESPONSE:
1076                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1077                 /*
1078                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1079                  * that if the content gets bigger it might be needed more than once
1080                  */
1081                         if (test_bit(id, seen_elems)) {
1082                                 elems->parse_error = true;
1083                                 continue;
1084                         }
1085                         break;
1086                 }
1087
1088                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1089                         crc = crc32_be(crc, pos - 2, elen + 2);
1090
1091                 elem_parse_failed = false;
1092
1093                 switch (id) {
1094                 case WLAN_EID_LINK_ID:
1095                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1096                                 elem_parse_failed = true;
1097                                 break;
1098                         }
1099                         elems->lnk_id = (void *)(pos - 2);
1100                         break;
1101                 case WLAN_EID_CHAN_SWITCH_TIMING:
1102                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1103                                 elem_parse_failed = true;
1104                                 break;
1105                         }
1106                         elems->ch_sw_timing = (void *)pos;
1107                         break;
1108                 case WLAN_EID_EXT_CAPABILITY:
1109                         elems->ext_capab = pos;
1110                         elems->ext_capab_len = elen;
1111                         break;
1112                 case WLAN_EID_SSID:
1113                         elems->ssid = pos;
1114                         elems->ssid_len = elen;
1115                         break;
1116                 case WLAN_EID_SUPP_RATES:
1117                         elems->supp_rates = pos;
1118                         elems->supp_rates_len = elen;
1119                         break;
1120                 case WLAN_EID_DS_PARAMS:
1121                         if (elen >= 1)
1122                                 elems->ds_params = pos;
1123                         else
1124                                 elem_parse_failed = true;
1125                         break;
1126                 case WLAN_EID_TIM:
1127                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1128                                 elems->tim = (void *)pos;
1129                                 elems->tim_len = elen;
1130                         } else
1131                                 elem_parse_failed = true;
1132                         break;
1133                 case WLAN_EID_VENDOR_SPECIFIC:
1134                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1135                             pos[2] == 0xf2) {
1136                                 /* Microsoft OUI (00:50:F2) */
1137
1138                                 if (calc_crc)
1139                                         crc = crc32_be(crc, pos - 2, elen + 2);
1140
1141                                 if (elen >= 5 && pos[3] == 2) {
1142                                         /* OUI Type 2 - WMM IE */
1143                                         if (pos[4] == 0) {
1144                                                 elems->wmm_info = pos;
1145                                                 elems->wmm_info_len = elen;
1146                                         } else if (pos[4] == 1) {
1147                                                 elems->wmm_param = pos;
1148                                                 elems->wmm_param_len = elen;
1149                                         }
1150                                 }
1151                         }
1152                         break;
1153                 case WLAN_EID_RSN:
1154                         elems->rsn = pos;
1155                         elems->rsn_len = elen;
1156                         break;
1157                 case WLAN_EID_ERP_INFO:
1158                         if (elen >= 1)
1159                                 elems->erp_info = pos;
1160                         else
1161                                 elem_parse_failed = true;
1162                         break;
1163                 case WLAN_EID_EXT_SUPP_RATES:
1164                         elems->ext_supp_rates = pos;
1165                         elems->ext_supp_rates_len = elen;
1166                         break;
1167                 case WLAN_EID_HT_CAPABILITY:
1168                         if (elen >= sizeof(struct ieee80211_ht_cap))
1169                                 elems->ht_cap_elem = (void *)pos;
1170                         else
1171                                 elem_parse_failed = true;
1172                         break;
1173                 case WLAN_EID_HT_OPERATION:
1174                         if (elen >= sizeof(struct ieee80211_ht_operation))
1175                                 elems->ht_operation = (void *)pos;
1176                         else
1177                                 elem_parse_failed = true;
1178                         break;
1179                 case WLAN_EID_VHT_CAPABILITY:
1180                         if (elen >= sizeof(struct ieee80211_vht_cap))
1181                                 elems->vht_cap_elem = (void *)pos;
1182                         else
1183                                 elem_parse_failed = true;
1184                         break;
1185                 case WLAN_EID_VHT_OPERATION:
1186                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1187                                 elems->vht_operation = (void *)pos;
1188                                 if (calc_crc)
1189                                         crc = crc32_be(crc, pos - 2, elen + 2);
1190                                 break;
1191                         }
1192                         elem_parse_failed = true;
1193                         break;
1194                 case WLAN_EID_OPMODE_NOTIF:
1195                         if (elen > 0) {
1196                                 elems->opmode_notif = pos;
1197                                 if (calc_crc)
1198                                         crc = crc32_be(crc, pos - 2, elen + 2);
1199                                 break;
1200                         }
1201                         elem_parse_failed = true;
1202                         break;
1203                 case WLAN_EID_MESH_ID:
1204                         elems->mesh_id = pos;
1205                         elems->mesh_id_len = elen;
1206                         break;
1207                 case WLAN_EID_MESH_CONFIG:
1208                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1209                                 elems->mesh_config = (void *)pos;
1210                         else
1211                                 elem_parse_failed = true;
1212                         break;
1213                 case WLAN_EID_PEER_MGMT:
1214                         elems->peering = pos;
1215                         elems->peering_len = elen;
1216                         break;
1217                 case WLAN_EID_MESH_AWAKE_WINDOW:
1218                         if (elen >= 2)
1219                                 elems->awake_window = (void *)pos;
1220                         break;
1221                 case WLAN_EID_PREQ:
1222                         elems->preq = pos;
1223                         elems->preq_len = elen;
1224                         break;
1225                 case WLAN_EID_PREP:
1226                         elems->prep = pos;
1227                         elems->prep_len = elen;
1228                         break;
1229                 case WLAN_EID_PERR:
1230                         elems->perr = pos;
1231                         elems->perr_len = elen;
1232                         break;
1233                 case WLAN_EID_RANN:
1234                         if (elen >= sizeof(struct ieee80211_rann_ie))
1235                                 elems->rann = (void *)pos;
1236                         else
1237                                 elem_parse_failed = true;
1238                         break;
1239                 case WLAN_EID_CHANNEL_SWITCH:
1240                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1241                                 elem_parse_failed = true;
1242                                 break;
1243                         }
1244                         elems->ch_switch_ie = (void *)pos;
1245                         break;
1246                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1247                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1248                                 elem_parse_failed = true;
1249                                 break;
1250                         }
1251                         elems->ext_chansw_ie = (void *)pos;
1252                         break;
1253                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1254                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1255                                 elem_parse_failed = true;
1256                                 break;
1257                         }
1258                         elems->sec_chan_offs = (void *)pos;
1259                         break;
1260                 case WLAN_EID_CHAN_SWITCH_PARAM:
1261                         if (elen <
1262                             sizeof(*elems->mesh_chansw_params_ie)) {
1263                                 elem_parse_failed = true;
1264                                 break;
1265                         }
1266                         elems->mesh_chansw_params_ie = (void *)pos;
1267                         break;
1268                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1269                         if (!action ||
1270                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1271                                 elem_parse_failed = true;
1272                                 break;
1273                         }
1274                         elems->wide_bw_chansw_ie = (void *)pos;
1275                         break;
1276                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1277                         if (action) {
1278                                 elem_parse_failed = true;
1279                                 break;
1280                         }
1281                         /*
1282                          * This is a bit tricky, but as we only care about
1283                          * the wide bandwidth channel switch element, so
1284                          * just parse it out manually.
1285                          */
1286                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1287                                               pos, elen);
1288                         if (ie) {
1289                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1290                                         elems->wide_bw_chansw_ie =
1291                                                 (void *)(ie + 2);
1292                                 else
1293                                         elem_parse_failed = true;
1294                         }
1295                         break;
1296                 case WLAN_EID_COUNTRY:
1297                         elems->country_elem = pos;
1298                         elems->country_elem_len = elen;
1299                         break;
1300                 case WLAN_EID_PWR_CONSTRAINT:
1301                         if (elen != 1) {
1302                                 elem_parse_failed = true;
1303                                 break;
1304                         }
1305                         elems->pwr_constr_elem = pos;
1306                         break;
1307                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1308                         /* Lots of different options exist, but we only care
1309                          * about the Dynamic Transmit Power Control element.
1310                          * First check for the Cisco OUI, then for the DTPC
1311                          * tag (0x00).
1312                          */
1313                         if (elen < 4) {
1314                                 elem_parse_failed = true;
1315                                 break;
1316                         }
1317
1318                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1319                             pos[2] != 0x96 || pos[3] != 0x00)
1320                                 break;
1321
1322                         if (elen != 6) {
1323                                 elem_parse_failed = true;
1324                                 break;
1325                         }
1326
1327                         if (calc_crc)
1328                                 crc = crc32_be(crc, pos - 2, elen + 2);
1329
1330                         elems->cisco_dtpc_elem = pos;
1331                         break;
1332                 case WLAN_EID_ADDBA_EXT:
1333                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1334                                 elem_parse_failed = true;
1335                                 break;
1336                         }
1337                         elems->addba_ext_ie = (void *)pos;
1338                         break;
1339                 case WLAN_EID_TIMEOUT_INTERVAL:
1340                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1341                                 elems->timeout_int = (void *)pos;
1342                         else
1343                                 elem_parse_failed = true;
1344                         break;
1345                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1346                         if (elen >= sizeof(*elems->max_idle_period_ie))
1347                                 elems->max_idle_period_ie = (void *)pos;
1348                         break;
1349                 case WLAN_EID_RSNX:
1350                         elems->rsnx = pos;
1351                         elems->rsnx_len = elen;
1352                         break;
1353                 case WLAN_EID_TX_POWER_ENVELOPE:
1354                         if (elen < 1 ||
1355                             elen > sizeof(struct ieee80211_tx_pwr_env))
1356                                 break;
1357
1358                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1359                                 break;
1360
1361                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1362                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1363                         elems->tx_pwr_env_num++;
1364                         break;
1365                 case WLAN_EID_EXTENSION:
1366                         ieee80211_parse_extension_element(calc_crc ?
1367                                                                 &crc : NULL,
1368                                                           elem, elems);
1369                         break;
1370                 case WLAN_EID_S1G_CAPABILITIES:
1371                         if (elen >= sizeof(*elems->s1g_capab))
1372                                 elems->s1g_capab = (void *)pos;
1373                         else
1374                                 elem_parse_failed = true;
1375                         break;
1376                 case WLAN_EID_S1G_OPERATION:
1377                         if (elen == sizeof(*elems->s1g_oper))
1378                                 elems->s1g_oper = (void *)pos;
1379                         else
1380                                 elem_parse_failed = true;
1381                         break;
1382                 case WLAN_EID_S1G_BCN_COMPAT:
1383                         if (elen == sizeof(*elems->s1g_bcn_compat))
1384                                 elems->s1g_bcn_compat = (void *)pos;
1385                         else
1386                                 elem_parse_failed = true;
1387                         break;
1388                 case WLAN_EID_AID_RESPONSE:
1389                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1390                                 elems->aid_resp = (void *)pos;
1391                         else
1392                                 elem_parse_failed = true;
1393                         break;
1394                 default:
1395                         break;
1396                 }
1397
1398                 if (elem_parse_failed)
1399                         elems->parse_error = true;
1400                 else
1401                         __set_bit(id, seen_elems);
1402         }
1403
1404         if (!for_each_element_completed(elem, start, len))
1405                 elems->parse_error = true;
1406
1407         return crc;
1408 }
1409
1410 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1411                                             struct ieee802_11_elems *elems,
1412                                             const u8 *transmitter_bssid,
1413                                             const u8 *bss_bssid,
1414                                             u8 *nontransmitted_profile)
1415 {
1416         const struct element *elem, *sub;
1417         size_t profile_len = 0;
1418         bool found = false;
1419
1420         if (!bss_bssid || !transmitter_bssid)
1421                 return profile_len;
1422
1423         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1424                 if (elem->datalen < 2)
1425                         continue;
1426
1427                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1428                         u8 new_bssid[ETH_ALEN];
1429                         const u8 *index;
1430
1431                         if (sub->id != 0 || sub->datalen < 4) {
1432                                 /* not a valid BSS profile */
1433                                 continue;
1434                         }
1435
1436                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1437                             sub->data[1] != 2) {
1438                                 /* The first element of the
1439                                  * Nontransmitted BSSID Profile is not
1440                                  * the Nontransmitted BSSID Capability
1441                                  * element.
1442                                  */
1443                                 continue;
1444                         }
1445
1446                         memset(nontransmitted_profile, 0, len);
1447                         profile_len = cfg80211_merge_profile(start, len,
1448                                                              elem,
1449                                                              sub,
1450                                                              nontransmitted_profile,
1451                                                              len);
1452
1453                         /* found a Nontransmitted BSSID Profile */
1454                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1455                                                  nontransmitted_profile,
1456                                                  profile_len);
1457                         if (!index || index[1] < 1 || index[2] == 0) {
1458                                 /* Invalid MBSSID Index element */
1459                                 continue;
1460                         }
1461
1462                         cfg80211_gen_new_bssid(transmitter_bssid,
1463                                                elem->data[0],
1464                                                index[2],
1465                                                new_bssid);
1466                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1467                                 found = true;
1468                                 elems->bssid_index_len = index[1];
1469                                 elems->bssid_index = (void *)&index[2];
1470                                 break;
1471                         }
1472                 }
1473         }
1474
1475         return found ? profile_len : 0;
1476 }
1477
1478 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
1479                                                     bool action, u64 filter,
1480                                                     u32 crc,
1481                                                     const u8 *transmitter_bssid,
1482                                                     const u8 *bss_bssid)
1483 {
1484         struct ieee802_11_elems *elems;
1485         const struct element *non_inherit = NULL;
1486         u8 *nontransmitted_profile;
1487         int nontransmitted_profile_len = 0;
1488
1489         elems = kzalloc(sizeof(*elems), GFP_ATOMIC);
1490         if (!elems)
1491                 return NULL;
1492         elems->ie_start = start;
1493         elems->total_len = len;
1494
1495         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1496         if (nontransmitted_profile) {
1497                 nontransmitted_profile_len =
1498                         ieee802_11_find_bssid_profile(start, len, elems,
1499                                                       transmitter_bssid,
1500                                                       bss_bssid,
1501                                                       nontransmitted_profile);
1502                 non_inherit =
1503                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1504                                                nontransmitted_profile,
1505                                                nontransmitted_profile_len);
1506         }
1507
1508         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1509                                           crc, non_inherit);
1510
1511         /* Override with nontransmitted profile, if found */
1512         if (nontransmitted_profile_len)
1513                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1514                                             nontransmitted_profile_len,
1515                                             action, elems, 0, 0, NULL);
1516
1517         if (elems->tim && !elems->parse_error) {
1518                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1519
1520                 elems->dtim_period = tim_ie->dtim_period;
1521                 elems->dtim_count = tim_ie->dtim_count;
1522         }
1523
1524         /* Override DTIM period and count if needed */
1525         if (elems->bssid_index &&
1526             elems->bssid_index_len >=
1527             offsetofend(struct ieee80211_bssid_index, dtim_period))
1528                 elems->dtim_period = elems->bssid_index->dtim_period;
1529
1530         if (elems->bssid_index &&
1531             elems->bssid_index_len >=
1532             offsetofend(struct ieee80211_bssid_index, dtim_count))
1533                 elems->dtim_count = elems->bssid_index->dtim_count;
1534
1535         kfree(nontransmitted_profile);
1536
1537         elems->crc = crc;
1538
1539         return elems;
1540 }
1541
1542 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1543                                            struct ieee80211_tx_queue_params
1544                                            *qparam, int ac)
1545 {
1546         struct ieee80211_chanctx_conf *chanctx_conf;
1547         const struct ieee80211_reg_rule *rrule;
1548         const struct ieee80211_wmm_ac *wmm_ac;
1549         u16 center_freq = 0;
1550
1551         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1552             sdata->vif.type != NL80211_IFTYPE_STATION)
1553                 return;
1554
1555         rcu_read_lock();
1556         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1557         if (chanctx_conf)
1558                 center_freq = chanctx_conf->def.chan->center_freq;
1559
1560         if (!center_freq) {
1561                 rcu_read_unlock();
1562                 return;
1563         }
1564
1565         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1566
1567         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1568                 rcu_read_unlock();
1569                 return;
1570         }
1571
1572         if (sdata->vif.type == NL80211_IFTYPE_AP)
1573                 wmm_ac = &rrule->wmm_rule.ap[ac];
1574         else
1575                 wmm_ac = &rrule->wmm_rule.client[ac];
1576         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1577         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1578         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1579         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1580         rcu_read_unlock();
1581 }
1582
1583 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1584                                bool bss_notify, bool enable_qos)
1585 {
1586         struct ieee80211_local *local = sdata->local;
1587         struct ieee80211_tx_queue_params qparam;
1588         struct ieee80211_chanctx_conf *chanctx_conf;
1589         int ac;
1590         bool use_11b;
1591         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1592         int aCWmin, aCWmax;
1593
1594         if (!local->ops->conf_tx)
1595                 return;
1596
1597         if (local->hw.queues < IEEE80211_NUM_ACS)
1598                 return;
1599
1600         memset(&qparam, 0, sizeof(qparam));
1601
1602         rcu_read_lock();
1603         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1604         use_11b = (chanctx_conf &&
1605                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1606                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1607         rcu_read_unlock();
1608
1609         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1610
1611         /* Set defaults according to 802.11-2007 Table 7-37 */
1612         aCWmax = 1023;
1613         if (use_11b)
1614                 aCWmin = 31;
1615         else
1616                 aCWmin = 15;
1617
1618         /* Confiure old 802.11b/g medium access rules. */
1619         qparam.cw_max = aCWmax;
1620         qparam.cw_min = aCWmin;
1621         qparam.txop = 0;
1622         qparam.aifs = 2;
1623
1624         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1625                 /* Update if QoS is enabled. */
1626                 if (enable_qos) {
1627                         switch (ac) {
1628                         case IEEE80211_AC_BK:
1629                                 qparam.cw_max = aCWmax;
1630                                 qparam.cw_min = aCWmin;
1631                                 qparam.txop = 0;
1632                                 if (is_ocb)
1633                                         qparam.aifs = 9;
1634                                 else
1635                                         qparam.aifs = 7;
1636                                 break;
1637                         /* never happens but let's not leave undefined */
1638                         default:
1639                         case IEEE80211_AC_BE:
1640                                 qparam.cw_max = aCWmax;
1641                                 qparam.cw_min = aCWmin;
1642                                 qparam.txop = 0;
1643                                 if (is_ocb)
1644                                         qparam.aifs = 6;
1645                                 else
1646                                         qparam.aifs = 3;
1647                                 break;
1648                         case IEEE80211_AC_VI:
1649                                 qparam.cw_max = aCWmin;
1650                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1651                                 if (is_ocb)
1652                                         qparam.txop = 0;
1653                                 else if (use_11b)
1654                                         qparam.txop = 6016/32;
1655                                 else
1656                                         qparam.txop = 3008/32;
1657
1658                                 if (is_ocb)
1659                                         qparam.aifs = 3;
1660                                 else
1661                                         qparam.aifs = 2;
1662                                 break;
1663                         case IEEE80211_AC_VO:
1664                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1665                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1666                                 if (is_ocb)
1667                                         qparam.txop = 0;
1668                                 else if (use_11b)
1669                                         qparam.txop = 3264/32;
1670                                 else
1671                                         qparam.txop = 1504/32;
1672                                 qparam.aifs = 2;
1673                                 break;
1674                         }
1675                 }
1676                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1677
1678                 qparam.uapsd = false;
1679
1680                 sdata->tx_conf[ac] = qparam;
1681                 drv_conf_tx(local, sdata, ac, &qparam);
1682         }
1683
1684         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1685             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1686             sdata->vif.type != NL80211_IFTYPE_NAN) {
1687                 sdata->vif.bss_conf.qos = enable_qos;
1688                 if (bss_notify)
1689                         ieee80211_bss_info_change_notify(sdata,
1690                                                          BSS_CHANGED_QOS);
1691         }
1692 }
1693
1694 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1695                          u16 transaction, u16 auth_alg, u16 status,
1696                          const u8 *extra, size_t extra_len, const u8 *da,
1697                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1698                          u32 tx_flags)
1699 {
1700         struct ieee80211_local *local = sdata->local;
1701         struct sk_buff *skb;
1702         struct ieee80211_mgmt *mgmt;
1703         int err;
1704
1705         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1706         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1707                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1708         if (!skb)
1709                 return;
1710
1711         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1712
1713         mgmt = skb_put_zero(skb, 24 + 6);
1714         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1715                                           IEEE80211_STYPE_AUTH);
1716         memcpy(mgmt->da, da, ETH_ALEN);
1717         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1718         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1719         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1720         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1721         mgmt->u.auth.status_code = cpu_to_le16(status);
1722         if (extra)
1723                 skb_put_data(skb, extra, extra_len);
1724
1725         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1726                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1727                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1728                 if (WARN_ON(err)) {
1729                         kfree_skb(skb);
1730                         return;
1731                 }
1732         }
1733
1734         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1735                                         tx_flags;
1736         ieee80211_tx_skb(sdata, skb);
1737 }
1738
1739 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1740                                     const u8 *da, const u8 *bssid,
1741                                     u16 stype, u16 reason,
1742                                     bool send_frame, u8 *frame_buf)
1743 {
1744         struct ieee80211_local *local = sdata->local;
1745         struct sk_buff *skb;
1746         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1747
1748         /* build frame */
1749         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1750         mgmt->duration = 0; /* initialize only */
1751         mgmt->seq_ctrl = 0; /* initialize only */
1752         memcpy(mgmt->da, da, ETH_ALEN);
1753         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1754         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1755         /* u.deauth.reason_code == u.disassoc.reason_code */
1756         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1757
1758         if (send_frame) {
1759                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1760                                     IEEE80211_DEAUTH_FRAME_LEN);
1761                 if (!skb)
1762                         return;
1763
1764                 skb_reserve(skb, local->hw.extra_tx_headroom);
1765
1766                 /* copy in frame */
1767                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1768
1769                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1770                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1771                         IEEE80211_SKB_CB(skb)->flags |=
1772                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1773
1774                 ieee80211_tx_skb(sdata, skb);
1775         }
1776 }
1777
1778 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1779 {
1780         if ((end - pos) < 5)
1781                 return pos;
1782
1783         *pos++ = WLAN_EID_EXTENSION;
1784         *pos++ = 1 + sizeof(cap);
1785         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1786         memcpy(pos, &cap, sizeof(cap));
1787
1788         return pos + 2;
1789 }
1790
1791 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1792                                          u8 *buffer, size_t buffer_len,
1793                                          const u8 *ie, size_t ie_len,
1794                                          enum nl80211_band band,
1795                                          u32 rate_mask,
1796                                          struct cfg80211_chan_def *chandef,
1797                                          size_t *offset, u32 flags)
1798 {
1799         struct ieee80211_local *local = sdata->local;
1800         struct ieee80211_supported_band *sband;
1801         const struct ieee80211_sta_he_cap *he_cap;
1802         u8 *pos = buffer, *end = buffer + buffer_len;
1803         size_t noffset;
1804         int supp_rates_len, i;
1805         u8 rates[32];
1806         int num_rates;
1807         int ext_rates_len;
1808         int shift;
1809         u32 rate_flags;
1810         bool have_80mhz = false;
1811
1812         *offset = 0;
1813
1814         sband = local->hw.wiphy->bands[band];
1815         if (WARN_ON_ONCE(!sband))
1816                 return 0;
1817
1818         rate_flags = ieee80211_chandef_rate_flags(chandef);
1819         shift = ieee80211_chandef_get_shift(chandef);
1820
1821         num_rates = 0;
1822         for (i = 0; i < sband->n_bitrates; i++) {
1823                 if ((BIT(i) & rate_mask) == 0)
1824                         continue; /* skip rate */
1825                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1826                         continue;
1827
1828                 rates[num_rates++] =
1829                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1830                                           (1 << shift) * 5);
1831         }
1832
1833         supp_rates_len = min_t(int, num_rates, 8);
1834
1835         if (end - pos < 2 + supp_rates_len)
1836                 goto out_err;
1837         *pos++ = WLAN_EID_SUPP_RATES;
1838         *pos++ = supp_rates_len;
1839         memcpy(pos, rates, supp_rates_len);
1840         pos += supp_rates_len;
1841
1842         /* insert "request information" if in custom IEs */
1843         if (ie && ie_len) {
1844                 static const u8 before_extrates[] = {
1845                         WLAN_EID_SSID,
1846                         WLAN_EID_SUPP_RATES,
1847                         WLAN_EID_REQUEST,
1848                 };
1849                 noffset = ieee80211_ie_split(ie, ie_len,
1850                                              before_extrates,
1851                                              ARRAY_SIZE(before_extrates),
1852                                              *offset);
1853                 if (end - pos < noffset - *offset)
1854                         goto out_err;
1855                 memcpy(pos, ie + *offset, noffset - *offset);
1856                 pos += noffset - *offset;
1857                 *offset = noffset;
1858         }
1859
1860         ext_rates_len = num_rates - supp_rates_len;
1861         if (ext_rates_len > 0) {
1862                 if (end - pos < 2 + ext_rates_len)
1863                         goto out_err;
1864                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1865                 *pos++ = ext_rates_len;
1866                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1867                 pos += ext_rates_len;
1868         }
1869
1870         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1871                 if (end - pos < 3)
1872                         goto out_err;
1873                 *pos++ = WLAN_EID_DS_PARAMS;
1874                 *pos++ = 1;
1875                 *pos++ = ieee80211_frequency_to_channel(
1876                                 chandef->chan->center_freq);
1877         }
1878
1879         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1880                 goto done;
1881
1882         /* insert custom IEs that go before HT */
1883         if (ie && ie_len) {
1884                 static const u8 before_ht[] = {
1885                         /*
1886                          * no need to list the ones split off already
1887                          * (or generated here)
1888                          */
1889                         WLAN_EID_DS_PARAMS,
1890                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1891                 };
1892                 noffset = ieee80211_ie_split(ie, ie_len,
1893                                              before_ht, ARRAY_SIZE(before_ht),
1894                                              *offset);
1895                 if (end - pos < noffset - *offset)
1896                         goto out_err;
1897                 memcpy(pos, ie + *offset, noffset - *offset);
1898                 pos += noffset - *offset;
1899                 *offset = noffset;
1900         }
1901
1902         if (sband->ht_cap.ht_supported) {
1903                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1904                         goto out_err;
1905                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1906                                                 sband->ht_cap.cap);
1907         }
1908
1909         /* insert custom IEs that go before VHT */
1910         if (ie && ie_len) {
1911                 static const u8 before_vht[] = {
1912                         /*
1913                          * no need to list the ones split off already
1914                          * (or generated here)
1915                          */
1916                         WLAN_EID_BSS_COEX_2040,
1917                         WLAN_EID_EXT_CAPABILITY,
1918                         WLAN_EID_SSID_LIST,
1919                         WLAN_EID_CHANNEL_USAGE,
1920                         WLAN_EID_INTERWORKING,
1921                         WLAN_EID_MESH_ID,
1922                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1923                 };
1924                 noffset = ieee80211_ie_split(ie, ie_len,
1925                                              before_vht, ARRAY_SIZE(before_vht),
1926                                              *offset);
1927                 if (end - pos < noffset - *offset)
1928                         goto out_err;
1929                 memcpy(pos, ie + *offset, noffset - *offset);
1930                 pos += noffset - *offset;
1931                 *offset = noffset;
1932         }
1933
1934         /* Check if any channel in this sband supports at least 80 MHz */
1935         for (i = 0; i < sband->n_channels; i++) {
1936                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1937                                                 IEEE80211_CHAN_NO_80MHZ))
1938                         continue;
1939
1940                 have_80mhz = true;
1941                 break;
1942         }
1943
1944         if (sband->vht_cap.vht_supported && have_80mhz) {
1945                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1946                         goto out_err;
1947                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1948                                                  sband->vht_cap.cap);
1949         }
1950
1951         /* insert custom IEs that go before HE */
1952         if (ie && ie_len) {
1953                 static const u8 before_he[] = {
1954                         /*
1955                          * no need to list the ones split off before VHT
1956                          * or generated here
1957                          */
1958                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1959                         WLAN_EID_AP_CSN,
1960                         /* TODO: add 11ah/11aj/11ak elements */
1961                 };
1962                 noffset = ieee80211_ie_split(ie, ie_len,
1963                                              before_he, ARRAY_SIZE(before_he),
1964                                              *offset);
1965                 if (end - pos < noffset - *offset)
1966                         goto out_err;
1967                 memcpy(pos, ie + *offset, noffset - *offset);
1968                 pos += noffset - *offset;
1969                 *offset = noffset;
1970         }
1971
1972         he_cap = ieee80211_get_he_iftype_cap(sband,
1973                                              ieee80211_vif_type_p2p(&sdata->vif));
1974         if (he_cap &&
1975             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1976                                          IEEE80211_CHAN_NO_HE)) {
1977                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1978                 if (!pos)
1979                         goto out_err;
1980         }
1981
1982         if (cfg80211_any_usable_channels(local->hw.wiphy,
1983                                          BIT(NL80211_BAND_6GHZ),
1984                                          IEEE80211_CHAN_NO_HE)) {
1985                 struct ieee80211_supported_band *sband6;
1986
1987                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1988                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1989                                 ieee80211_vif_type_p2p(&sdata->vif));
1990
1991                 if (he_cap) {
1992                         enum nl80211_iftype iftype =
1993                                 ieee80211_vif_type_p2p(&sdata->vif);
1994                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1995
1996                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1997                 }
1998         }
1999
2000         /*
2001          * If adding more here, adjust code in main.c
2002          * that calculates local->scan_ies_len.
2003          */
2004
2005         return pos - buffer;
2006  out_err:
2007         WARN_ONCE(1, "not enough space for preq IEs\n");
2008  done:
2009         return pos - buffer;
2010 }
2011
2012 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2013                              size_t buffer_len,
2014                              struct ieee80211_scan_ies *ie_desc,
2015                              const u8 *ie, size_t ie_len,
2016                              u8 bands_used, u32 *rate_masks,
2017                              struct cfg80211_chan_def *chandef,
2018                              u32 flags)
2019 {
2020         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2021         int i;
2022
2023         memset(ie_desc, 0, sizeof(*ie_desc));
2024
2025         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2026                 if (bands_used & BIT(i)) {
2027                         pos += ieee80211_build_preq_ies_band(sdata,
2028                                                              buffer + pos,
2029                                                              buffer_len - pos,
2030                                                              ie, ie_len, i,
2031                                                              rate_masks[i],
2032                                                              chandef,
2033                                                              &custom_ie_offset,
2034                                                              flags);
2035                         ie_desc->ies[i] = buffer + old_pos;
2036                         ie_desc->len[i] = pos - old_pos;
2037                         old_pos = pos;
2038                 }
2039         }
2040
2041         /* add any remaining custom IEs */
2042         if (ie && ie_len) {
2043                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2044                               "not enough space for preq custom IEs\n"))
2045                         return pos;
2046                 memcpy(buffer + pos, ie + custom_ie_offset,
2047                        ie_len - custom_ie_offset);
2048                 ie_desc->common_ies = buffer + pos;
2049                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2050                 pos += ie_len - custom_ie_offset;
2051         }
2052
2053         return pos;
2054 };
2055
2056 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2057                                           const u8 *src, const u8 *dst,
2058                                           u32 ratemask,
2059                                           struct ieee80211_channel *chan,
2060                                           const u8 *ssid, size_t ssid_len,
2061                                           const u8 *ie, size_t ie_len,
2062                                           u32 flags)
2063 {
2064         struct ieee80211_local *local = sdata->local;
2065         struct cfg80211_chan_def chandef;
2066         struct sk_buff *skb;
2067         struct ieee80211_mgmt *mgmt;
2068         int ies_len;
2069         u32 rate_masks[NUM_NL80211_BANDS] = {};
2070         struct ieee80211_scan_ies dummy_ie_desc;
2071
2072         /*
2073          * Do not send DS Channel parameter for directed probe requests
2074          * in order to maximize the chance that we get a response.  Some
2075          * badly-behaved APs don't respond when this parameter is included.
2076          */
2077         chandef.width = sdata->vif.bss_conf.chandef.width;
2078         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2079                 chandef.chan = NULL;
2080         else
2081                 chandef.chan = chan;
2082
2083         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2084                                      local->scan_ies_len + ie_len);
2085         if (!skb)
2086                 return NULL;
2087
2088         rate_masks[chan->band] = ratemask;
2089         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2090                                            skb_tailroom(skb), &dummy_ie_desc,
2091                                            ie, ie_len, BIT(chan->band),
2092                                            rate_masks, &chandef, flags);
2093         skb_put(skb, ies_len);
2094
2095         if (dst) {
2096                 mgmt = (struct ieee80211_mgmt *) skb->data;
2097                 memcpy(mgmt->da, dst, ETH_ALEN);
2098                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2099         }
2100
2101         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2102
2103         return skb;
2104 }
2105
2106 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2107                             struct ieee802_11_elems *elems,
2108                             enum nl80211_band band, u32 *basic_rates)
2109 {
2110         struct ieee80211_supported_band *sband;
2111         size_t num_rates;
2112         u32 supp_rates, rate_flags;
2113         int i, j, shift;
2114
2115         sband = sdata->local->hw.wiphy->bands[band];
2116         if (WARN_ON(!sband))
2117                 return 1;
2118
2119         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2120         shift = ieee80211_vif_get_shift(&sdata->vif);
2121
2122         num_rates = sband->n_bitrates;
2123         supp_rates = 0;
2124         for (i = 0; i < elems->supp_rates_len +
2125                      elems->ext_supp_rates_len; i++) {
2126                 u8 rate = 0;
2127                 int own_rate;
2128                 bool is_basic;
2129                 if (i < elems->supp_rates_len)
2130                         rate = elems->supp_rates[i];
2131                 else if (elems->ext_supp_rates)
2132                         rate = elems->ext_supp_rates
2133                                 [i - elems->supp_rates_len];
2134                 own_rate = 5 * (rate & 0x7f);
2135                 is_basic = !!(rate & 0x80);
2136
2137                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2138                         continue;
2139
2140                 for (j = 0; j < num_rates; j++) {
2141                         int brate;
2142                         if ((rate_flags & sband->bitrates[j].flags)
2143                             != rate_flags)
2144                                 continue;
2145
2146                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2147                                              1 << shift);
2148
2149                         if (brate == own_rate) {
2150                                 supp_rates |= BIT(j);
2151                                 if (basic_rates && is_basic)
2152                                         *basic_rates |= BIT(j);
2153                         }
2154                 }
2155         }
2156         return supp_rates;
2157 }
2158
2159 void ieee80211_stop_device(struct ieee80211_local *local)
2160 {
2161         ieee80211_led_radio(local, false);
2162         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2163
2164         cancel_work_sync(&local->reconfig_filter);
2165
2166         flush_workqueue(local->workqueue);
2167         drv_stop(local);
2168 }
2169
2170 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2171                                            bool aborted)
2172 {
2173         /* It's possible that we don't handle the scan completion in
2174          * time during suspend, so if it's still marked as completed
2175          * here, queue the work and flush it to clean things up.
2176          * Instead of calling the worker function directly here, we
2177          * really queue it to avoid potential races with other flows
2178          * scheduling the same work.
2179          */
2180         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2181                 /* If coming from reconfiguration failure, abort the scan so
2182                  * we don't attempt to continue a partial HW scan - which is
2183                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2184                  * completed scan, and a 5 GHz portion is still pending.
2185                  */
2186                 if (aborted)
2187                         set_bit(SCAN_ABORTED, &local->scanning);
2188                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2189                 flush_delayed_work(&local->scan_work);
2190         }
2191 }
2192
2193 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2194 {
2195         struct ieee80211_sub_if_data *sdata;
2196         struct ieee80211_chanctx *ctx;
2197
2198         /*
2199          * We get here if during resume the device can't be restarted properly.
2200          * We might also get here if this happens during HW reset, which is a
2201          * slightly different situation and we need to drop all connections in
2202          * the latter case.
2203          *
2204          * Ask cfg80211 to turn off all interfaces, this will result in more
2205          * warnings but at least we'll then get into a clean stopped state.
2206          */
2207
2208         local->resuming = false;
2209         local->suspended = false;
2210         local->in_reconfig = false;
2211
2212         ieee80211_flush_completed_scan(local, true);
2213
2214         /* scheduled scan clearly can't be running any more, but tell
2215          * cfg80211 and clear local state
2216          */
2217         ieee80211_sched_scan_end(local);
2218
2219         list_for_each_entry(sdata, &local->interfaces, list)
2220                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2221
2222         /* Mark channel contexts as not being in the driver any more to avoid
2223          * removing them from the driver during the shutdown process...
2224          */
2225         mutex_lock(&local->chanctx_mtx);
2226         list_for_each_entry(ctx, &local->chanctx_list, list)
2227                 ctx->driver_present = false;
2228         mutex_unlock(&local->chanctx_mtx);
2229 }
2230
2231 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2232                                      struct ieee80211_sub_if_data *sdata)
2233 {
2234         struct ieee80211_chanctx_conf *conf;
2235         struct ieee80211_chanctx *ctx;
2236
2237         if (!local->use_chanctx)
2238                 return;
2239
2240         mutex_lock(&local->chanctx_mtx);
2241         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2242                                          lockdep_is_held(&local->chanctx_mtx));
2243         if (conf) {
2244                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2245                 drv_assign_vif_chanctx(local, sdata, ctx);
2246         }
2247         mutex_unlock(&local->chanctx_mtx);
2248 }
2249
2250 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2251 {
2252         struct ieee80211_local *local = sdata->local;
2253         struct sta_info *sta;
2254
2255         /* add STAs back */
2256         mutex_lock(&local->sta_mtx);
2257         list_for_each_entry(sta, &local->sta_list, list) {
2258                 enum ieee80211_sta_state state;
2259
2260                 if (!sta->uploaded || sta->sdata != sdata)
2261                         continue;
2262
2263                 for (state = IEEE80211_STA_NOTEXIST;
2264                      state < sta->sta_state; state++)
2265                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2266                                               state + 1));
2267         }
2268         mutex_unlock(&local->sta_mtx);
2269 }
2270
2271 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2272 {
2273         struct cfg80211_nan_func *func, **funcs;
2274         int res, id, i = 0;
2275
2276         res = drv_start_nan(sdata->local, sdata,
2277                             &sdata->u.nan.conf);
2278         if (WARN_ON(res))
2279                 return res;
2280
2281         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2282                         sizeof(*funcs),
2283                         GFP_KERNEL);
2284         if (!funcs)
2285                 return -ENOMEM;
2286
2287         /* Add all the functions:
2288          * This is a little bit ugly. We need to call a potentially sleeping
2289          * callback for each NAN function, so we can't hold the spinlock.
2290          */
2291         spin_lock_bh(&sdata->u.nan.func_lock);
2292
2293         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2294                 funcs[i++] = func;
2295
2296         spin_unlock_bh(&sdata->u.nan.func_lock);
2297
2298         for (i = 0; funcs[i]; i++) {
2299                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2300                 if (WARN_ON(res))
2301                         ieee80211_nan_func_terminated(&sdata->vif,
2302                                                       funcs[i]->instance_id,
2303                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2304                                                       GFP_KERNEL);
2305         }
2306
2307         kfree(funcs);
2308
2309         return 0;
2310 }
2311
2312 int ieee80211_reconfig(struct ieee80211_local *local)
2313 {
2314         struct ieee80211_hw *hw = &local->hw;
2315         struct ieee80211_sub_if_data *sdata;
2316         struct ieee80211_chanctx *ctx;
2317         struct sta_info *sta;
2318         int res, i;
2319         bool reconfig_due_to_wowlan = false;
2320         struct ieee80211_sub_if_data *sched_scan_sdata;
2321         struct cfg80211_sched_scan_request *sched_scan_req;
2322         bool sched_scan_stopped = false;
2323         bool suspended = local->suspended;
2324
2325         /* nothing to do if HW shouldn't run */
2326         if (!local->open_count)
2327                 goto wake_up;
2328
2329 #ifdef CONFIG_PM
2330         if (suspended)
2331                 local->resuming = true;
2332
2333         if (local->wowlan) {
2334                 /*
2335                  * In the wowlan case, both mac80211 and the device
2336                  * are functional when the resume op is called, so
2337                  * clear local->suspended so the device could operate
2338                  * normally (e.g. pass rx frames).
2339                  */
2340                 local->suspended = false;
2341                 res = drv_resume(local);
2342                 local->wowlan = false;
2343                 if (res < 0) {
2344                         local->resuming = false;
2345                         return res;
2346                 }
2347                 if (res == 0)
2348                         goto wake_up;
2349                 WARN_ON(res > 1);
2350                 /*
2351                  * res is 1, which means the driver requested
2352                  * to go through a regular reset on wakeup.
2353                  * restore local->suspended in this case.
2354                  */
2355                 reconfig_due_to_wowlan = true;
2356                 local->suspended = true;
2357         }
2358 #endif
2359
2360         /*
2361          * In case of hw_restart during suspend (without wowlan),
2362          * cancel restart work, as we are reconfiguring the device
2363          * anyway.
2364          * Note that restart_work is scheduled on a frozen workqueue,
2365          * so we can't deadlock in this case.
2366          */
2367         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2368                 cancel_work_sync(&local->restart_work);
2369
2370         local->started = false;
2371
2372         /*
2373          * Upon resume hardware can sometimes be goofy due to
2374          * various platform / driver / bus issues, so restarting
2375          * the device may at times not work immediately. Propagate
2376          * the error.
2377          */
2378         res = drv_start(local);
2379         if (res) {
2380                 if (suspended)
2381                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2382                 else
2383                         WARN(1, "Hardware became unavailable during restart.\n");
2384                 ieee80211_handle_reconfig_failure(local);
2385                 return res;
2386         }
2387
2388         /* setup fragmentation threshold */
2389         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2390
2391         /* setup RTS threshold */
2392         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2393
2394         /* reset coverage class */
2395         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2396
2397         ieee80211_led_radio(local, true);
2398         ieee80211_mod_tpt_led_trig(local,
2399                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2400
2401         /* add interfaces */
2402         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2403         if (sdata) {
2404                 /* in HW restart it exists already */
2405                 WARN_ON(local->resuming);
2406                 res = drv_add_interface(local, sdata);
2407                 if (WARN_ON(res)) {
2408                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2409                         synchronize_net();
2410                         kfree(sdata);
2411                 }
2412         }
2413
2414         list_for_each_entry(sdata, &local->interfaces, list) {
2415                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2416                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2417                     ieee80211_sdata_running(sdata)) {
2418                         res = drv_add_interface(local, sdata);
2419                         if (WARN_ON(res))
2420                                 break;
2421                 }
2422         }
2423
2424         /* If adding any of the interfaces failed above, roll back and
2425          * report failure.
2426          */
2427         if (res) {
2428                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2429                                                      list)
2430                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2431                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2432                             ieee80211_sdata_running(sdata))
2433                                 drv_remove_interface(local, sdata);
2434                 ieee80211_handle_reconfig_failure(local);
2435                 return res;
2436         }
2437
2438         /* add channel contexts */
2439         if (local->use_chanctx) {
2440                 mutex_lock(&local->chanctx_mtx);
2441                 list_for_each_entry(ctx, &local->chanctx_list, list)
2442                         if (ctx->replace_state !=
2443                             IEEE80211_CHANCTX_REPLACES_OTHER)
2444                                 WARN_ON(drv_add_chanctx(local, ctx));
2445                 mutex_unlock(&local->chanctx_mtx);
2446
2447                 sdata = wiphy_dereference(local->hw.wiphy,
2448                                           local->monitor_sdata);
2449                 if (sdata && ieee80211_sdata_running(sdata))
2450                         ieee80211_assign_chanctx(local, sdata);
2451         }
2452
2453         /* reconfigure hardware */
2454         ieee80211_hw_config(local, ~0);
2455
2456         ieee80211_configure_filter(local);
2457
2458         /* Finally also reconfigure all the BSS information */
2459         list_for_each_entry(sdata, &local->interfaces, list) {
2460                 u32 changed;
2461
2462                 if (!ieee80211_sdata_running(sdata))
2463                         continue;
2464
2465                 ieee80211_assign_chanctx(local, sdata);
2466
2467                 switch (sdata->vif.type) {
2468                 case NL80211_IFTYPE_AP_VLAN:
2469                 case NL80211_IFTYPE_MONITOR:
2470                         break;
2471                 case NL80211_IFTYPE_ADHOC:
2472                         if (sdata->vif.bss_conf.ibss_joined)
2473                                 WARN_ON(drv_join_ibss(local, sdata));
2474                         fallthrough;
2475                 default:
2476                         ieee80211_reconfig_stations(sdata);
2477                         fallthrough;
2478                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2479                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2480                                 drv_conf_tx(local, sdata, i,
2481                                             &sdata->tx_conf[i]);
2482                         break;
2483                 }
2484
2485                 /* common change flags for all interface types */
2486                 changed = BSS_CHANGED_ERP_CTS_PROT |
2487                           BSS_CHANGED_ERP_PREAMBLE |
2488                           BSS_CHANGED_ERP_SLOT |
2489                           BSS_CHANGED_HT |
2490                           BSS_CHANGED_BASIC_RATES |
2491                           BSS_CHANGED_BEACON_INT |
2492                           BSS_CHANGED_BSSID |
2493                           BSS_CHANGED_CQM |
2494                           BSS_CHANGED_QOS |
2495                           BSS_CHANGED_IDLE |
2496                           BSS_CHANGED_TXPOWER |
2497                           BSS_CHANGED_MCAST_RATE;
2498
2499                 if (sdata->vif.mu_mimo_owner)
2500                         changed |= BSS_CHANGED_MU_GROUPS;
2501
2502                 switch (sdata->vif.type) {
2503                 case NL80211_IFTYPE_STATION:
2504                         changed |= BSS_CHANGED_ASSOC |
2505                                    BSS_CHANGED_ARP_FILTER |
2506                                    BSS_CHANGED_PS;
2507
2508                         /* Re-send beacon info report to the driver */
2509                         if (sdata->u.mgd.have_beacon)
2510                                 changed |= BSS_CHANGED_BEACON_INFO;
2511
2512                         if (sdata->vif.bss_conf.max_idle_period ||
2513                             sdata->vif.bss_conf.protected_keep_alive)
2514                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2515
2516                         sdata_lock(sdata);
2517                         ieee80211_bss_info_change_notify(sdata, changed);
2518                         sdata_unlock(sdata);
2519                         break;
2520                 case NL80211_IFTYPE_OCB:
2521                         changed |= BSS_CHANGED_OCB;
2522                         ieee80211_bss_info_change_notify(sdata, changed);
2523                         break;
2524                 case NL80211_IFTYPE_ADHOC:
2525                         changed |= BSS_CHANGED_IBSS;
2526                         fallthrough;
2527                 case NL80211_IFTYPE_AP:
2528                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2529
2530                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2531                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2532                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2533                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2534
2535                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2536                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2537
2538                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2539                                         drv_start_ap(local, sdata);
2540                         }
2541                         fallthrough;
2542                 case NL80211_IFTYPE_MESH_POINT:
2543                         if (sdata->vif.bss_conf.enable_beacon) {
2544                                 changed |= BSS_CHANGED_BEACON |
2545                                            BSS_CHANGED_BEACON_ENABLED;
2546                                 ieee80211_bss_info_change_notify(sdata, changed);
2547                         }
2548                         break;
2549                 case NL80211_IFTYPE_NAN:
2550                         res = ieee80211_reconfig_nan(sdata);
2551                         if (res < 0) {
2552                                 ieee80211_handle_reconfig_failure(local);
2553                                 return res;
2554                         }
2555                         break;
2556                 case NL80211_IFTYPE_AP_VLAN:
2557                 case NL80211_IFTYPE_MONITOR:
2558                 case NL80211_IFTYPE_P2P_DEVICE:
2559                         /* nothing to do */
2560                         break;
2561                 case NL80211_IFTYPE_UNSPECIFIED:
2562                 case NUM_NL80211_IFTYPES:
2563                 case NL80211_IFTYPE_P2P_CLIENT:
2564                 case NL80211_IFTYPE_P2P_GO:
2565                 case NL80211_IFTYPE_WDS:
2566                         WARN_ON(1);
2567                         break;
2568                 }
2569         }
2570
2571         ieee80211_recalc_ps(local);
2572
2573         /*
2574          * The sta might be in psm against the ap (e.g. because
2575          * this was the state before a hw restart), so we
2576          * explicitly send a null packet in order to make sure
2577          * it'll sync against the ap (and get out of psm).
2578          */
2579         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2580                 list_for_each_entry(sdata, &local->interfaces, list) {
2581                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2582                                 continue;
2583                         if (!sdata->u.mgd.associated)
2584                                 continue;
2585
2586                         ieee80211_send_nullfunc(local, sdata, false);
2587                 }
2588         }
2589
2590         /* APs are now beaconing, add back stations */
2591         mutex_lock(&local->sta_mtx);
2592         list_for_each_entry(sta, &local->sta_list, list) {
2593                 enum ieee80211_sta_state state;
2594
2595                 if (!sta->uploaded)
2596                         continue;
2597
2598                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2599                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2600                         continue;
2601
2602                 for (state = IEEE80211_STA_NOTEXIST;
2603                      state < sta->sta_state; state++)
2604                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2605                                               state + 1));
2606         }
2607         mutex_unlock(&local->sta_mtx);
2608
2609         /* add back keys */
2610         list_for_each_entry(sdata, &local->interfaces, list)
2611                 ieee80211_reenable_keys(sdata);
2612
2613         /* Reconfigure sched scan if it was interrupted by FW restart */
2614         mutex_lock(&local->mtx);
2615         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2616                                                 lockdep_is_held(&local->mtx));
2617         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2618                                                 lockdep_is_held(&local->mtx));
2619         if (sched_scan_sdata && sched_scan_req)
2620                 /*
2621                  * Sched scan stopped, but we don't want to report it. Instead,
2622                  * we're trying to reschedule. However, if more than one scan
2623                  * plan was set, we cannot reschedule since we don't know which
2624                  * scan plan was currently running (and some scan plans may have
2625                  * already finished).
2626                  */
2627                 if (sched_scan_req->n_scan_plans > 1 ||
2628                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2629                                                          sched_scan_req)) {
2630                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2631                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2632                         sched_scan_stopped = true;
2633                 }
2634         mutex_unlock(&local->mtx);
2635
2636         if (sched_scan_stopped)
2637                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2638
2639  wake_up:
2640
2641         if (local->monitors == local->open_count && local->monitors > 0)
2642                 ieee80211_add_virtual_monitor(local);
2643
2644         /*
2645          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2646          * sessions can be established after a resume.
2647          *
2648          * Also tear down aggregation sessions since reconfiguring
2649          * them in a hardware restart scenario is not easily done
2650          * right now, and the hardware will have lost information
2651          * about the sessions, but we and the AP still think they
2652          * are active. This is really a workaround though.
2653          */
2654         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2655                 mutex_lock(&local->sta_mtx);
2656
2657                 list_for_each_entry(sta, &local->sta_list, list) {
2658                         if (!local->resuming)
2659                                 ieee80211_sta_tear_down_BA_sessions(
2660                                                 sta, AGG_STOP_LOCAL_REQUEST);
2661                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2662                 }
2663
2664                 mutex_unlock(&local->sta_mtx);
2665         }
2666
2667         /*
2668          * If this is for hw restart things are still running.
2669          * We may want to change that later, however.
2670          */
2671         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2672                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2673
2674         if (local->in_reconfig) {
2675                 local->in_reconfig = false;
2676                 barrier();
2677
2678                 /* Restart deferred ROCs */
2679                 mutex_lock(&local->mtx);
2680                 ieee80211_start_next_roc(local);
2681                 mutex_unlock(&local->mtx);
2682
2683                 /* Requeue all works */
2684                 list_for_each_entry(sdata, &local->interfaces, list)
2685                         ieee80211_queue_work(&local->hw, &sdata->work);
2686         }
2687
2688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2689                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2690                                         false);
2691
2692         if (!suspended)
2693                 return 0;
2694
2695 #ifdef CONFIG_PM
2696         /* first set suspended false, then resuming */
2697         local->suspended = false;
2698         mb();
2699         local->resuming = false;
2700
2701         ieee80211_flush_completed_scan(local, false);
2702
2703         if (local->open_count && !reconfig_due_to_wowlan)
2704                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2705
2706         list_for_each_entry(sdata, &local->interfaces, list) {
2707                 if (!ieee80211_sdata_running(sdata))
2708                         continue;
2709                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2710                         ieee80211_sta_restart(sdata);
2711         }
2712
2713         mod_timer(&local->sta_cleanup, jiffies + 1);
2714 #else
2715         WARN_ON(1);
2716 #endif
2717
2718         return 0;
2719 }
2720
2721 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2722 {
2723         struct ieee80211_sub_if_data *sdata;
2724         struct ieee80211_local *local;
2725         struct ieee80211_key *key;
2726
2727         if (WARN_ON(!vif))
2728                 return;
2729
2730         sdata = vif_to_sdata(vif);
2731         local = sdata->local;
2732
2733         if (WARN_ON(!local->resuming))
2734                 return;
2735
2736         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2737                 return;
2738
2739         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2740
2741         mutex_lock(&local->key_mtx);
2742         list_for_each_entry(key, &sdata->key_list, list)
2743                 key->flags |= KEY_FLAG_TAINTED;
2744         mutex_unlock(&local->key_mtx);
2745 }
2746 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2747
2748 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2749 {
2750         struct ieee80211_local *local = sdata->local;
2751         struct ieee80211_chanctx_conf *chanctx_conf;
2752         struct ieee80211_chanctx *chanctx;
2753
2754         mutex_lock(&local->chanctx_mtx);
2755
2756         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2757                                         lockdep_is_held(&local->chanctx_mtx));
2758
2759         /*
2760          * This function can be called from a work, thus it may be possible
2761          * that the chanctx_conf is removed (due to a disconnection, for
2762          * example).
2763          * So nothing should be done in such case.
2764          */
2765         if (!chanctx_conf)
2766                 goto unlock;
2767
2768         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2769         ieee80211_recalc_smps_chanctx(local, chanctx);
2770  unlock:
2771         mutex_unlock(&local->chanctx_mtx);
2772 }
2773
2774 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2775 {
2776         struct ieee80211_local *local = sdata->local;
2777         struct ieee80211_chanctx_conf *chanctx_conf;
2778         struct ieee80211_chanctx *chanctx;
2779
2780         mutex_lock(&local->chanctx_mtx);
2781
2782         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2783                                         lockdep_is_held(&local->chanctx_mtx));
2784
2785         if (WARN_ON_ONCE(!chanctx_conf))
2786                 goto unlock;
2787
2788         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2789         ieee80211_recalc_chanctx_min_def(local, chanctx);
2790  unlock:
2791         mutex_unlock(&local->chanctx_mtx);
2792 }
2793
2794 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2795 {
2796         size_t pos = offset;
2797
2798         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2799                 pos += 2 + ies[pos + 1];
2800
2801         return pos;
2802 }
2803
2804 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2805                                             int rssi_min_thold,
2806                                             int rssi_max_thold)
2807 {
2808         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2809
2810         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2811                 return;
2812
2813         /*
2814          * Scale up threshold values before storing it, as the RSSI averaging
2815          * algorithm uses a scaled up value as well. Change this scaling
2816          * factor if the RSSI averaging algorithm changes.
2817          */
2818         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2819         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2820 }
2821
2822 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2823                                     int rssi_min_thold,
2824                                     int rssi_max_thold)
2825 {
2826         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2827
2828         WARN_ON(rssi_min_thold == rssi_max_thold ||
2829                 rssi_min_thold > rssi_max_thold);
2830
2831         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2832                                        rssi_max_thold);
2833 }
2834 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2835
2836 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2837 {
2838         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2839
2840         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2841 }
2842 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2843
2844 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2845                               u16 cap)
2846 {
2847         __le16 tmp;
2848
2849         *pos++ = WLAN_EID_HT_CAPABILITY;
2850         *pos++ = sizeof(struct ieee80211_ht_cap);
2851         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2852
2853         /* capability flags */
2854         tmp = cpu_to_le16(cap);
2855         memcpy(pos, &tmp, sizeof(u16));
2856         pos += sizeof(u16);
2857
2858         /* AMPDU parameters */
2859         *pos++ = ht_cap->ampdu_factor |
2860                  (ht_cap->ampdu_density <<
2861                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2862
2863         /* MCS set */
2864         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2865         pos += sizeof(ht_cap->mcs);
2866
2867         /* extended capabilities */
2868         pos += sizeof(__le16);
2869
2870         /* BF capabilities */
2871         pos += sizeof(__le32);
2872
2873         /* antenna selection */
2874         pos += sizeof(u8);
2875
2876         return pos;
2877 }
2878
2879 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2880                                u32 cap)
2881 {
2882         __le32 tmp;
2883
2884         *pos++ = WLAN_EID_VHT_CAPABILITY;
2885         *pos++ = sizeof(struct ieee80211_vht_cap);
2886         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2887
2888         /* capability flags */
2889         tmp = cpu_to_le32(cap);
2890         memcpy(pos, &tmp, sizeof(u32));
2891         pos += sizeof(u32);
2892
2893         /* VHT MCS set */
2894         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2895         pos += sizeof(vht_cap->vht_mcs);
2896
2897         return pos;
2898 }
2899
2900 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2901 {
2902         const struct ieee80211_sta_he_cap *he_cap;
2903         struct ieee80211_supported_band *sband;
2904         u8 n;
2905
2906         sband = ieee80211_get_sband(sdata);
2907         if (!sband)
2908                 return 0;
2909
2910         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2911         if (!he_cap)
2912                 return 0;
2913
2914         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2915         return 2 + 1 +
2916                sizeof(he_cap->he_cap_elem) + n +
2917                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2918                                      he_cap->he_cap_elem.phy_cap_info);
2919 }
2920
2921 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2922                               const struct ieee80211_sta_he_cap *he_cap,
2923                               u8 *end)
2924 {
2925         u8 n;
2926         u8 ie_len;
2927         u8 *orig_pos = pos;
2928
2929         /* Make sure we have place for the IE */
2930         /*
2931          * TODO: the 1 added is because this temporarily is under the EXTENSION
2932          * IE. Get rid of it when it moves.
2933          */
2934         if (!he_cap)
2935                 return orig_pos;
2936
2937         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2938         ie_len = 2 + 1 +
2939                  sizeof(he_cap->he_cap_elem) + n +
2940                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2941                                        he_cap->he_cap_elem.phy_cap_info);
2942
2943         if ((end - pos) < ie_len)
2944                 return orig_pos;
2945
2946         *pos++ = WLAN_EID_EXTENSION;
2947         pos++; /* We'll set the size later below */
2948         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2949
2950         /* Fixed data */
2951         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2952         pos += sizeof(he_cap->he_cap_elem);
2953
2954         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2955         pos += n;
2956
2957         /* Check if PPE Threshold should be present */
2958         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2959              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2960                 goto end;
2961
2962         /*
2963          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2964          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2965          */
2966         n = hweight8(he_cap->ppe_thres[0] &
2967                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2968         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2969                    IEEE80211_PPE_THRES_NSS_POS));
2970
2971         /*
2972          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2973          * total size.
2974          */
2975         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2976         n = DIV_ROUND_UP(n, 8);
2977
2978         /* Copy PPE Thresholds */
2979         memcpy(pos, &he_cap->ppe_thres, n);
2980         pos += n;
2981
2982 end:
2983         orig_pos[1] = (pos - orig_pos) - 2;
2984         return pos;
2985 }
2986
2987 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2988                                     struct sk_buff *skb)
2989 {
2990         struct ieee80211_supported_band *sband;
2991         const struct ieee80211_sband_iftype_data *iftd;
2992         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2993         u8 *pos;
2994         u16 cap;
2995
2996         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2997                                           BIT(NL80211_BAND_6GHZ),
2998                                           IEEE80211_CHAN_NO_HE))
2999                 return;
3000
3001         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3002
3003         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3004         if (!iftd)
3005                 return;
3006
3007         /* Check for device HE 6 GHz capability before adding element */
3008         if (!iftd->he_6ghz_capa.capa)
3009                 return;
3010
3011         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3012         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3013
3014         switch (sdata->smps_mode) {
3015         case IEEE80211_SMPS_AUTOMATIC:
3016         case IEEE80211_SMPS_NUM_MODES:
3017                 WARN_ON(1);
3018                 fallthrough;
3019         case IEEE80211_SMPS_OFF:
3020                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3021                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3022                 break;
3023         case IEEE80211_SMPS_STATIC:
3024                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3025                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3026                 break;
3027         case IEEE80211_SMPS_DYNAMIC:
3028                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3029                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3030                 break;
3031         }
3032
3033         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3034         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3035                                     pos + 2 + 1 + sizeof(cap));
3036 }
3037
3038 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3039                                const struct cfg80211_chan_def *chandef,
3040                                u16 prot_mode, bool rifs_mode)
3041 {
3042         struct ieee80211_ht_operation *ht_oper;
3043         /* Build HT Information */
3044         *pos++ = WLAN_EID_HT_OPERATION;
3045         *pos++ = sizeof(struct ieee80211_ht_operation);
3046         ht_oper = (struct ieee80211_ht_operation *)pos;
3047         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3048                                         chandef->chan->center_freq);
3049         switch (chandef->width) {
3050         case NL80211_CHAN_WIDTH_160:
3051         case NL80211_CHAN_WIDTH_80P80:
3052         case NL80211_CHAN_WIDTH_80:
3053         case NL80211_CHAN_WIDTH_40:
3054                 if (chandef->center_freq1 > chandef->chan->center_freq)
3055                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3056                 else
3057                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3058                 break;
3059         default:
3060                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3061                 break;
3062         }
3063         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3064             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3065             chandef->width != NL80211_CHAN_WIDTH_20)
3066                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3067
3068         if (rifs_mode)
3069                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3070
3071         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3072         ht_oper->stbc_param = 0x0000;
3073
3074         /* It seems that Basic MCS set and Supported MCS set
3075            are identical for the first 10 bytes */
3076         memset(&ht_oper->basic_set, 0, 16);
3077         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3078
3079         return pos + sizeof(struct ieee80211_ht_operation);
3080 }
3081
3082 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3083                                    const struct cfg80211_chan_def *chandef)
3084 {
3085         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3086         *pos++ = 3;                                     /* IE length */
3087         /* New channel width */
3088         switch (chandef->width) {
3089         case NL80211_CHAN_WIDTH_80:
3090                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3091                 break;
3092         case NL80211_CHAN_WIDTH_160:
3093                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3094                 break;
3095         case NL80211_CHAN_WIDTH_80P80:
3096                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3097                 break;
3098         default:
3099                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3100         }
3101
3102         /* new center frequency segment 0 */
3103         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3104         /* new center frequency segment 1 */
3105         if (chandef->center_freq2)
3106                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3107         else
3108                 *pos++ = 0;
3109 }
3110
3111 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3112                                 const struct cfg80211_chan_def *chandef)
3113 {
3114         struct ieee80211_vht_operation *vht_oper;
3115
3116         *pos++ = WLAN_EID_VHT_OPERATION;
3117         *pos++ = sizeof(struct ieee80211_vht_operation);
3118         vht_oper = (struct ieee80211_vht_operation *)pos;
3119         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3120                                                         chandef->center_freq1);
3121         if (chandef->center_freq2)
3122                 vht_oper->center_freq_seg1_idx =
3123                         ieee80211_frequency_to_channel(chandef->center_freq2);
3124         else
3125                 vht_oper->center_freq_seg1_idx = 0x00;
3126
3127         switch (chandef->width) {
3128         case NL80211_CHAN_WIDTH_160:
3129                 /*
3130                  * Convert 160 MHz channel width to new style as interop
3131                  * workaround.
3132                  */
3133                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3134                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3135                 if (chandef->chan->center_freq < chandef->center_freq1)
3136                         vht_oper->center_freq_seg0_idx -= 8;
3137                 else
3138                         vht_oper->center_freq_seg0_idx += 8;
3139                 break;
3140         case NL80211_CHAN_WIDTH_80P80:
3141                 /*
3142                  * Convert 80+80 MHz channel width to new style as interop
3143                  * workaround.
3144                  */
3145                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3146                 break;
3147         case NL80211_CHAN_WIDTH_80:
3148                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3149                 break;
3150         default:
3151                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3152                 break;
3153         }
3154
3155         /* don't require special VHT peer rates */
3156         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3157
3158         return pos + sizeof(struct ieee80211_vht_operation);
3159 }
3160
3161 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3162 {
3163         struct ieee80211_he_operation *he_oper;
3164         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3165         u32 he_oper_params;
3166         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3167
3168         if (chandef->chan->band == NL80211_BAND_6GHZ)
3169                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3170
3171         *pos++ = WLAN_EID_EXTENSION;
3172         *pos++ = ie_len;
3173         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3174
3175         he_oper_params = 0;
3176         he_oper_params |= u32_encode_bits(1023, /* disabled */
3177                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3178         he_oper_params |= u32_encode_bits(1,
3179                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3180         he_oper_params |= u32_encode_bits(1,
3181                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3182         if (chandef->chan->band == NL80211_BAND_6GHZ)
3183                 he_oper_params |= u32_encode_bits(1,
3184                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3185
3186         he_oper = (struct ieee80211_he_operation *)pos;
3187         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3188
3189         /* don't require special HE peer rates */
3190         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3191         pos += sizeof(struct ieee80211_he_operation);
3192
3193         if (chandef->chan->band != NL80211_BAND_6GHZ)
3194                 goto out;
3195
3196         /* TODO add VHT operational */
3197         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3198         he_6ghz_op->minrate = 6; /* 6 Mbps */
3199         he_6ghz_op->primary =
3200                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3201         he_6ghz_op->ccfs0 =
3202                 ieee80211_frequency_to_channel(chandef->center_freq1);
3203         if (chandef->center_freq2)
3204                 he_6ghz_op->ccfs1 =
3205                         ieee80211_frequency_to_channel(chandef->center_freq2);
3206         else
3207                 he_6ghz_op->ccfs1 = 0;
3208
3209         switch (chandef->width) {
3210         case NL80211_CHAN_WIDTH_160:
3211                 /* Convert 160 MHz channel width to new style as interop
3212                  * workaround.
3213                  */
3214                 he_6ghz_op->control =
3215                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3216                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3217                 if (chandef->chan->center_freq < chandef->center_freq1)
3218                         he_6ghz_op->ccfs0 -= 8;
3219                 else
3220                         he_6ghz_op->ccfs0 += 8;
3221                 fallthrough;
3222         case NL80211_CHAN_WIDTH_80P80:
3223                 he_6ghz_op->control =
3224                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3225                 break;
3226         case NL80211_CHAN_WIDTH_80:
3227                 he_6ghz_op->control =
3228                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3229                 break;
3230         case NL80211_CHAN_WIDTH_40:
3231                 he_6ghz_op->control =
3232                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3233                 break;
3234         default:
3235                 he_6ghz_op->control =
3236                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3237                 break;
3238         }
3239
3240         pos += sizeof(struct ieee80211_he_6ghz_oper);
3241
3242 out:
3243         return pos;
3244 }
3245
3246 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3247                                struct cfg80211_chan_def *chandef)
3248 {
3249         enum nl80211_channel_type channel_type;
3250
3251         if (!ht_oper)
3252                 return false;
3253
3254         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3255         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3256                 channel_type = NL80211_CHAN_HT20;
3257                 break;
3258         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3259                 channel_type = NL80211_CHAN_HT40PLUS;
3260                 break;
3261         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3262                 channel_type = NL80211_CHAN_HT40MINUS;
3263                 break;
3264         default:
3265                 channel_type = NL80211_CHAN_NO_HT;
3266                 return false;
3267         }
3268
3269         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3270         return true;
3271 }
3272
3273 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3274                                 const struct ieee80211_vht_operation *oper,
3275                                 const struct ieee80211_ht_operation *htop,
3276                                 struct cfg80211_chan_def *chandef)
3277 {
3278         struct cfg80211_chan_def new = *chandef;
3279         int cf0, cf1;
3280         int ccfs0, ccfs1, ccfs2;
3281         int ccf0, ccf1;
3282         u32 vht_cap;
3283         bool support_80_80 = false;
3284         bool support_160 = false;
3285         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3286                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3287         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3288                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3289
3290         if (!oper || !htop)
3291                 return false;
3292
3293         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3294         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3295                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3296         support_80_80 = ((vht_cap &
3297                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3298                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3299                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3300                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3301                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3302         ccfs0 = oper->center_freq_seg0_idx;
3303         ccfs1 = oper->center_freq_seg1_idx;
3304         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3305                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3306                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3307
3308         ccf0 = ccfs0;
3309
3310         /* if not supported, parse as though we didn't understand it */
3311         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3312                 ext_nss_bw_supp = 0;
3313
3314         /*
3315          * Cf. IEEE 802.11 Table 9-250
3316          *
3317          * We really just consider that because it's inefficient to connect
3318          * at a higher bandwidth than we'll actually be able to use.
3319          */
3320         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3321         default:
3322         case 0x00:
3323                 ccf1 = 0;
3324                 support_160 = false;
3325                 support_80_80 = false;
3326                 break;
3327         case 0x01:
3328                 support_80_80 = false;
3329                 fallthrough;
3330         case 0x02:
3331         case 0x03:
3332                 ccf1 = ccfs2;
3333                 break;
3334         case 0x10:
3335                 ccf1 = ccfs1;
3336                 break;
3337         case 0x11:
3338         case 0x12:
3339                 if (!ccfs1)
3340                         ccf1 = ccfs2;
3341                 else
3342                         ccf1 = ccfs1;
3343                 break;
3344         case 0x13:
3345         case 0x20:
3346         case 0x23:
3347                 ccf1 = ccfs1;
3348                 break;
3349         }
3350
3351         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3352         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3353
3354         switch (oper->chan_width) {
3355         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3356                 /* just use HT information directly */
3357                 break;
3358         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3359                 new.width = NL80211_CHAN_WIDTH_80;
3360                 new.center_freq1 = cf0;
3361                 /* If needed, adjust based on the newer interop workaround. */
3362                 if (ccf1) {
3363                         unsigned int diff;
3364
3365                         diff = abs(ccf1 - ccf0);
3366                         if ((diff == 8) && support_160) {
3367                                 new.width = NL80211_CHAN_WIDTH_160;
3368                                 new.center_freq1 = cf1;
3369                         } else if ((diff > 8) && support_80_80) {
3370                                 new.width = NL80211_CHAN_WIDTH_80P80;
3371                                 new.center_freq2 = cf1;
3372                         }
3373                 }
3374                 break;
3375         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3376                 /* deprecated encoding */
3377                 new.width = NL80211_CHAN_WIDTH_160;
3378                 new.center_freq1 = cf0;
3379                 break;
3380         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3381                 /* deprecated encoding */
3382                 new.width = NL80211_CHAN_WIDTH_80P80;
3383                 new.center_freq1 = cf0;
3384                 new.center_freq2 = cf1;
3385                 break;
3386         default:
3387                 return false;
3388         }
3389
3390         if (!cfg80211_chandef_valid(&new))
3391                 return false;
3392
3393         *chandef = new;
3394         return true;
3395 }
3396
3397 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3398                                     const struct ieee80211_he_operation *he_oper,
3399                                     struct cfg80211_chan_def *chandef)
3400 {
3401         struct ieee80211_local *local = sdata->local;
3402         struct ieee80211_supported_band *sband;
3403         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3404         const struct ieee80211_sta_he_cap *he_cap;
3405         struct cfg80211_chan_def he_chandef = *chandef;
3406         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3407         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3408         bool support_80_80, support_160;
3409         u8 he_phy_cap;
3410         u32 freq;
3411
3412         if (chandef->chan->band != NL80211_BAND_6GHZ)
3413                 return true;
3414
3415         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3416
3417         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3418         if (!he_cap) {
3419                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3420                 return false;
3421         }
3422
3423         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3424         support_160 =
3425                 he_phy_cap &
3426                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3427         support_80_80 =
3428                 he_phy_cap &
3429                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3430
3431         if (!he_oper) {
3432                 sdata_info(sdata,
3433                            "HE is not advertised on (on %d MHz), expect issues\n",
3434                            chandef->chan->center_freq);
3435                 return false;
3436         }
3437
3438         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3439
3440         if (!he_6ghz_oper) {
3441                 sdata_info(sdata,
3442                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3443                            chandef->chan->center_freq);
3444                 return false;
3445         }
3446
3447         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3448                                               NL80211_BAND_6GHZ);
3449         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3450
3451         switch (u8_get_bits(he_6ghz_oper->control,
3452                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3453         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3454                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3455                 break;
3456         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3457                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3458                 break;
3459         default:
3460                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3461                 break;
3462         }
3463
3464         switch (u8_get_bits(he_6ghz_oper->control,
3465                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3466         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3467                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3468                 break;
3469         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3470                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3471                 break;
3472         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3473                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3474                 break;
3475         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3476                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3477                 if (!he_6ghz_oper->ccfs1)
3478                         break;
3479                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3480                         if (support_160)
3481                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3482                 } else {
3483                         if (support_80_80)
3484                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3485                 }
3486                 break;
3487         }
3488
3489         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3490                 he_chandef.center_freq1 =
3491                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3492                                                        NL80211_BAND_6GHZ);
3493         } else {
3494                 he_chandef.center_freq1 =
3495                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3496                                                        NL80211_BAND_6GHZ);
3497                 if (support_80_80 || support_160)
3498                         he_chandef.center_freq2 =
3499                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3500                                                                NL80211_BAND_6GHZ);
3501         }
3502
3503         if (!cfg80211_chandef_valid(&he_chandef)) {
3504                 sdata_info(sdata,
3505                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3506                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3507                            he_chandef.width,
3508                            he_chandef.center_freq1,
3509                            he_chandef.center_freq2);
3510                 return false;
3511         }
3512
3513         *chandef = he_chandef;
3514
3515         return true;
3516 }
3517
3518 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3519                                 struct cfg80211_chan_def *chandef)
3520 {
3521         u32 oper_freq;
3522
3523         if (!oper)
3524                 return false;
3525
3526         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3527         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3528                 chandef->width = NL80211_CHAN_WIDTH_1;
3529                 break;
3530         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3531                 chandef->width = NL80211_CHAN_WIDTH_2;
3532                 break;
3533         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3534                 chandef->width = NL80211_CHAN_WIDTH_4;
3535                 break;
3536         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3537                 chandef->width = NL80211_CHAN_WIDTH_8;
3538                 break;
3539         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3540                 chandef->width = NL80211_CHAN_WIDTH_16;
3541                 break;
3542         default:
3543                 return false;
3544         }
3545
3546         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3547                                                   NL80211_BAND_S1GHZ);
3548         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3549         chandef->freq1_offset = oper_freq % 1000;
3550
3551         return true;
3552 }
3553
3554 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3555                              const struct ieee80211_supported_band *sband,
3556                              const u8 *srates, int srates_len, u32 *rates)
3557 {
3558         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3559         int shift = ieee80211_chandef_get_shift(chandef);
3560         struct ieee80211_rate *br;
3561         int brate, rate, i, j, count = 0;
3562
3563         *rates = 0;
3564
3565         for (i = 0; i < srates_len; i++) {
3566                 rate = srates[i] & 0x7f;
3567
3568                 for (j = 0; j < sband->n_bitrates; j++) {
3569                         br = &sband->bitrates[j];
3570                         if ((rate_flags & br->flags) != rate_flags)
3571                                 continue;
3572
3573                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3574                         if (brate == rate) {
3575                                 *rates |= BIT(j);
3576                                 count++;
3577                                 break;
3578                         }
3579                 }
3580         }
3581         return count;
3582 }
3583
3584 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3585                             struct sk_buff *skb, bool need_basic,
3586                             enum nl80211_band band)
3587 {
3588         struct ieee80211_local *local = sdata->local;
3589         struct ieee80211_supported_band *sband;
3590         int rate, shift;
3591         u8 i, rates, *pos;
3592         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3593         u32 rate_flags;
3594
3595         shift = ieee80211_vif_get_shift(&sdata->vif);
3596         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3597         sband = local->hw.wiphy->bands[band];
3598         rates = 0;
3599         for (i = 0; i < sband->n_bitrates; i++) {
3600                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3601                         continue;
3602                 rates++;
3603         }
3604         if (rates > 8)
3605                 rates = 8;
3606
3607         if (skb_tailroom(skb) < rates + 2)
3608                 return -ENOMEM;
3609
3610         pos = skb_put(skb, rates + 2);
3611         *pos++ = WLAN_EID_SUPP_RATES;
3612         *pos++ = rates;
3613         for (i = 0; i < rates; i++) {
3614                 u8 basic = 0;
3615                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3616                         continue;
3617
3618                 if (need_basic && basic_rates & BIT(i))
3619                         basic = 0x80;
3620                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3621                                     5 * (1 << shift));
3622                 *pos++ = basic | (u8) rate;
3623         }
3624
3625         return 0;
3626 }
3627
3628 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3629                                 struct sk_buff *skb, bool need_basic,
3630                                 enum nl80211_band band)
3631 {
3632         struct ieee80211_local *local = sdata->local;
3633         struct ieee80211_supported_band *sband;
3634         int rate, shift;
3635         u8 i, exrates, *pos;
3636         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3637         u32 rate_flags;
3638
3639         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3640         shift = ieee80211_vif_get_shift(&sdata->vif);
3641
3642         sband = local->hw.wiphy->bands[band];
3643         exrates = 0;
3644         for (i = 0; i < sband->n_bitrates; i++) {
3645                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3646                         continue;
3647                 exrates++;
3648         }
3649
3650         if (exrates > 8)
3651                 exrates -= 8;
3652         else
3653                 exrates = 0;
3654
3655         if (skb_tailroom(skb) < exrates + 2)
3656                 return -ENOMEM;
3657
3658         if (exrates) {
3659                 pos = skb_put(skb, exrates + 2);
3660                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3661                 *pos++ = exrates;
3662                 for (i = 8; i < sband->n_bitrates; i++) {
3663                         u8 basic = 0;
3664                         if ((rate_flags & sband->bitrates[i].flags)
3665                             != rate_flags)
3666                                 continue;
3667                         if (need_basic && basic_rates & BIT(i))
3668                                 basic = 0x80;
3669                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3670                                             5 * (1 << shift));
3671                         *pos++ = basic | (u8) rate;
3672                 }
3673         }
3674         return 0;
3675 }
3676
3677 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3678 {
3679         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3680         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3681
3682         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3683                 /* non-managed type inferfaces */
3684                 return 0;
3685         }
3686         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3687 }
3688 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3689
3690 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3691 {
3692         if (!mcs)
3693                 return 1;
3694
3695         /* TODO: consider rx_highest */
3696
3697         if (mcs->rx_mask[3])
3698                 return 4;
3699         if (mcs->rx_mask[2])
3700                 return 3;
3701         if (mcs->rx_mask[1])
3702                 return 2;
3703         return 1;
3704 }
3705
3706 /**
3707  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3708  * @local: mac80211 hw info struct
3709  * @status: RX status
3710  * @mpdu_len: total MPDU length (including FCS)
3711  * @mpdu_offset: offset into MPDU to calculate timestamp at
3712  *
3713  * This function calculates the RX timestamp at the given MPDU offset, taking
3714  * into account what the RX timestamp was. An offset of 0 will just normalize
3715  * the timestamp to TSF at beginning of MPDU reception.
3716  */
3717 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3718                                      struct ieee80211_rx_status *status,
3719                                      unsigned int mpdu_len,
3720                                      unsigned int mpdu_offset)
3721 {
3722         u64 ts = status->mactime;
3723         struct rate_info ri;
3724         u16 rate;
3725         u8 n_ltf;
3726
3727         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3728                 return 0;
3729
3730         memset(&ri, 0, sizeof(ri));
3731
3732         ri.bw = status->bw;
3733
3734         /* Fill cfg80211 rate info */
3735         switch (status->encoding) {
3736         case RX_ENC_HE:
3737                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3738                 ri.mcs = status->rate_idx;
3739                 ri.nss = status->nss;
3740                 ri.he_ru_alloc = status->he_ru;
3741                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3742                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3743
3744                 /*
3745                  * See P802.11ax_D6.0, section 27.3.4 for
3746                  * VHT PPDU format.
3747                  */
3748                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3749                         mpdu_offset += 2;
3750                         ts += 36;
3751
3752                         /*
3753                          * TODO:
3754                          * For HE MU PPDU, add the HE-SIG-B.
3755                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3756                          * For HE TB PPDU, add 4us for the HE-STF.
3757                          * Add the HE-LTF durations - variable.
3758                          */
3759                 }
3760
3761                 break;
3762         case RX_ENC_HT:
3763                 ri.mcs = status->rate_idx;
3764                 ri.flags |= RATE_INFO_FLAGS_MCS;
3765                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3766                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3767
3768                 /*
3769                  * See P802.11REVmd_D3.0, section 19.3.2 for
3770                  * HT PPDU format.
3771                  */
3772                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3773                         mpdu_offset += 2;
3774                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3775                                 ts += 24;
3776                         else
3777                                 ts += 32;
3778
3779                         /*
3780                          * Add Data HT-LTFs per streams
3781                          * TODO: add Extension HT-LTFs, 4us per LTF
3782                          */
3783                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3784                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3785                         ts += n_ltf * 4;
3786                 }
3787
3788                 break;
3789         case RX_ENC_VHT:
3790                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3791                 ri.mcs = status->rate_idx;
3792                 ri.nss = status->nss;
3793                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3794                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3795
3796                 /*
3797                  * See P802.11REVmd_D3.0, section 21.3.2 for
3798                  * VHT PPDU format.
3799                  */
3800                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3801                         mpdu_offset += 2;
3802                         ts += 36;
3803
3804                         /*
3805                          * Add VHT-LTFs per streams
3806                          */
3807                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3808                                 ri.nss + 1 : ri.nss;
3809                         ts += 4 * n_ltf;
3810                 }
3811
3812                 break;
3813         default:
3814                 WARN_ON(1);
3815                 fallthrough;
3816         case RX_ENC_LEGACY: {
3817                 struct ieee80211_supported_band *sband;
3818                 int shift = 0;
3819                 int bitrate;
3820
3821                 switch (status->bw) {
3822                 case RATE_INFO_BW_10:
3823                         shift = 1;
3824                         break;
3825                 case RATE_INFO_BW_5:
3826                         shift = 2;
3827                         break;
3828                 }
3829
3830                 sband = local->hw.wiphy->bands[status->band];
3831                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3832                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3833
3834                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3835                         if (status->band == NL80211_BAND_5GHZ) {
3836                                 ts += 20 << shift;
3837                                 mpdu_offset += 2;
3838                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3839                                 ts += 96;
3840                         } else {
3841                                 ts += 192;
3842                         }
3843                 }
3844                 break;
3845                 }
3846         }
3847
3848         rate = cfg80211_calculate_bitrate(&ri);
3849         if (WARN_ONCE(!rate,
3850                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3851                       (unsigned long long)status->flag, status->rate_idx,
3852                       status->nss))
3853                 return 0;
3854
3855         /* rewind from end of MPDU */
3856         if (status->flag & RX_FLAG_MACTIME_END)
3857                 ts -= mpdu_len * 8 * 10 / rate;
3858
3859         ts += mpdu_offset * 8 * 10 / rate;
3860
3861         return ts;
3862 }
3863
3864 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3865 {
3866         struct ieee80211_sub_if_data *sdata;
3867         struct cfg80211_chan_def chandef;
3868
3869         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3870         lockdep_assert_wiphy(local->hw.wiphy);
3871
3872         mutex_lock(&local->mtx);
3873         list_for_each_entry(sdata, &local->interfaces, list) {
3874                 /* it might be waiting for the local->mtx, but then
3875                  * by the time it gets it, sdata->wdev.cac_started
3876                  * will no longer be true
3877                  */
3878                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3879
3880                 if (sdata->wdev.cac_started) {
3881                         chandef = sdata->vif.bss_conf.chandef;
3882                         ieee80211_vif_release_channel(sdata);
3883                         cfg80211_cac_event(sdata->dev,
3884                                            &chandef,
3885                                            NL80211_RADAR_CAC_ABORTED,
3886                                            GFP_KERNEL);
3887                 }
3888         }
3889         mutex_unlock(&local->mtx);
3890 }
3891
3892 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3893 {
3894         struct ieee80211_local *local =
3895                 container_of(work, struct ieee80211_local, radar_detected_work);
3896         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3897         struct ieee80211_chanctx *ctx;
3898         int num_chanctx = 0;
3899
3900         mutex_lock(&local->chanctx_mtx);
3901         list_for_each_entry(ctx, &local->chanctx_list, list) {
3902                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3903                         continue;
3904
3905                 num_chanctx++;
3906                 chandef = ctx->conf.def;
3907         }
3908         mutex_unlock(&local->chanctx_mtx);
3909
3910         wiphy_lock(local->hw.wiphy);
3911         ieee80211_dfs_cac_cancel(local);
3912         wiphy_unlock(local->hw.wiphy);
3913
3914         if (num_chanctx > 1)
3915                 /* XXX: multi-channel is not supported yet */
3916                 WARN_ON(1);
3917         else
3918                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3919 }
3920
3921 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3922 {
3923         struct ieee80211_local *local = hw_to_local(hw);
3924
3925         trace_api_radar_detected(local);
3926
3927         schedule_work(&local->radar_detected_work);
3928 }
3929 EXPORT_SYMBOL(ieee80211_radar_detected);
3930
3931 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3932 {
3933         u32 ret;
3934         int tmp;
3935
3936         switch (c->width) {
3937         case NL80211_CHAN_WIDTH_20:
3938                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3939                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3940                 break;
3941         case NL80211_CHAN_WIDTH_40:
3942                 c->width = NL80211_CHAN_WIDTH_20;
3943                 c->center_freq1 = c->chan->center_freq;
3944                 ret = IEEE80211_STA_DISABLE_40MHZ |
3945                       IEEE80211_STA_DISABLE_VHT;
3946                 break;
3947         case NL80211_CHAN_WIDTH_80:
3948                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3949                 /* n_P40 */
3950                 tmp /= 2;
3951                 /* freq_P40 */
3952                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3953                 c->width = NL80211_CHAN_WIDTH_40;
3954                 ret = IEEE80211_STA_DISABLE_VHT;
3955                 break;
3956         case NL80211_CHAN_WIDTH_80P80:
3957                 c->center_freq2 = 0;
3958                 c->width = NL80211_CHAN_WIDTH_80;
3959                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3960                       IEEE80211_STA_DISABLE_160MHZ;
3961                 break;
3962         case NL80211_CHAN_WIDTH_160:
3963                 /* n_P20 */
3964                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3965                 /* n_P80 */
3966                 tmp /= 4;
3967                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3968                 c->width = NL80211_CHAN_WIDTH_80;
3969                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3970                       IEEE80211_STA_DISABLE_160MHZ;
3971                 break;
3972         default:
3973         case NL80211_CHAN_WIDTH_20_NOHT:
3974                 WARN_ON_ONCE(1);
3975                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3976                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3977                 break;
3978         case NL80211_CHAN_WIDTH_1:
3979         case NL80211_CHAN_WIDTH_2:
3980         case NL80211_CHAN_WIDTH_4:
3981         case NL80211_CHAN_WIDTH_8:
3982         case NL80211_CHAN_WIDTH_16:
3983         case NL80211_CHAN_WIDTH_5:
3984         case NL80211_CHAN_WIDTH_10:
3985                 WARN_ON_ONCE(1);
3986                 /* keep c->width */
3987                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3988                 break;
3989         }
3990
3991         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3992
3993         return ret;
3994 }
3995
3996 /*
3997  * Returns true if smps_mode_new is strictly more restrictive than
3998  * smps_mode_old.
3999  */
4000 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4001                                    enum ieee80211_smps_mode smps_mode_new)
4002 {
4003         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4004                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4005                 return false;
4006
4007         switch (smps_mode_old) {
4008         case IEEE80211_SMPS_STATIC:
4009                 return false;
4010         case IEEE80211_SMPS_DYNAMIC:
4011                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4012         case IEEE80211_SMPS_OFF:
4013                 return smps_mode_new != IEEE80211_SMPS_OFF;
4014         default:
4015                 WARN_ON(1);
4016         }
4017
4018         return false;
4019 }
4020
4021 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4022                               struct cfg80211_csa_settings *csa_settings)
4023 {
4024         struct sk_buff *skb;
4025         struct ieee80211_mgmt *mgmt;
4026         struct ieee80211_local *local = sdata->local;
4027         int freq;
4028         int hdr_len = offsetofend(struct ieee80211_mgmt,
4029                                   u.action.u.chan_switch);
4030         u8 *pos;
4031
4032         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4033             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4034                 return -EOPNOTSUPP;
4035
4036         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4037                             5 + /* channel switch announcement element */
4038                             3 + /* secondary channel offset element */
4039                             5 + /* wide bandwidth channel switch announcement */
4040                             8); /* mesh channel switch parameters element */
4041         if (!skb)
4042                 return -ENOMEM;
4043
4044         skb_reserve(skb, local->tx_headroom);
4045         mgmt = skb_put_zero(skb, hdr_len);
4046         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4047                                           IEEE80211_STYPE_ACTION);
4048
4049         eth_broadcast_addr(mgmt->da);
4050         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4051         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4052                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4053         } else {
4054                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4055                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4056         }
4057         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4058         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4059         pos = skb_put(skb, 5);
4060         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4061         *pos++ = 3;                                             /* IE length */
4062         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4063         freq = csa_settings->chandef.chan->center_freq;
4064         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4065         *pos++ = csa_settings->count;                           /* count */
4066
4067         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4068                 enum nl80211_channel_type ch_type;
4069
4070                 skb_put(skb, 3);
4071                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4072                 *pos++ = 1;                                     /* IE length */
4073                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4074                 if (ch_type == NL80211_CHAN_HT40PLUS)
4075                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4076                 else
4077                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4078         }
4079
4080         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4081                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4082
4083                 skb_put(skb, 8);
4084                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4085                 *pos++ = 6;                                     /* IE length */
4086                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4087                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4088                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4089                 *pos++ |= csa_settings->block_tx ?
4090                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4091                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4092                 pos += 2;
4093                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4094                 pos += 2;
4095         }
4096
4097         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4098             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4099             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4100                 skb_put(skb, 5);
4101                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4102         }
4103
4104         ieee80211_tx_skb(sdata, skb);
4105         return 0;
4106 }
4107
4108 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4109 {
4110         return !(cs == NULL || cs->cipher == 0 ||
4111                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4112                  cs->hdr_len <= cs->key_idx_off ||
4113                  cs->key_idx_shift > 7 ||
4114                  cs->key_idx_mask == 0);
4115 }
4116
4117 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4118 {
4119         int i;
4120
4121         /* Ensure we have enough iftype bitmap space for all iftype values */
4122         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4123
4124         for (i = 0; i < n; i++)
4125                 if (!ieee80211_cs_valid(&cs[i]))
4126                         return false;
4127
4128         return true;
4129 }
4130
4131 const struct ieee80211_cipher_scheme *
4132 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4133                  enum nl80211_iftype iftype)
4134 {
4135         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4136         int n = local->hw.n_cipher_schemes;
4137         int i;
4138         const struct ieee80211_cipher_scheme *cs = NULL;
4139
4140         for (i = 0; i < n; i++) {
4141                 if (l[i].cipher == cipher) {
4142                         cs = &l[i];
4143                         break;
4144                 }
4145         }
4146
4147         if (!cs || !(cs->iftype & BIT(iftype)))
4148                 return NULL;
4149
4150         return cs;
4151 }
4152
4153 int ieee80211_cs_headroom(struct ieee80211_local *local,
4154                           struct cfg80211_crypto_settings *crypto,
4155                           enum nl80211_iftype iftype)
4156 {
4157         const struct ieee80211_cipher_scheme *cs;
4158         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4159         int i;
4160
4161         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4162                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4163                                       iftype);
4164
4165                 if (cs && headroom < cs->hdr_len)
4166                         headroom = cs->hdr_len;
4167         }
4168
4169         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4170         if (cs && headroom < cs->hdr_len)
4171                 headroom = cs->hdr_len;
4172
4173         return headroom;
4174 }
4175
4176 static bool
4177 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4178 {
4179         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4180         int skip;
4181
4182         if (end > 0)
4183                 return false;
4184
4185         /* One shot NOA  */
4186         if (data->count[i] == 1)
4187                 return false;
4188
4189         if (data->desc[i].interval == 0)
4190                 return false;
4191
4192         /* End time is in the past, check for repetitions */
4193         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4194         if (data->count[i] < 255) {
4195                 if (data->count[i] <= skip) {
4196                         data->count[i] = 0;
4197                         return false;
4198                 }
4199
4200                 data->count[i] -= skip;
4201         }
4202
4203         data->desc[i].start += skip * data->desc[i].interval;
4204
4205         return true;
4206 }
4207
4208 static bool
4209 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4210                              s32 *offset)
4211 {
4212         bool ret = false;
4213         int i;
4214
4215         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4216                 s32 cur;
4217
4218                 if (!data->count[i])
4219                         continue;
4220
4221                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4222                         ret = true;
4223
4224                 cur = data->desc[i].start - tsf;
4225                 if (cur > *offset)
4226                         continue;
4227
4228                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4229                 if (cur > *offset)
4230                         *offset = cur;
4231         }
4232
4233         return ret;
4234 }
4235
4236 static u32
4237 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4238 {
4239         s32 offset = 0;
4240         int tries = 0;
4241         /*
4242          * arbitrary limit, used to avoid infinite loops when combined NoA
4243          * descriptors cover the full time period.
4244          */
4245         int max_tries = 5;
4246
4247         ieee80211_extend_absent_time(data, tsf, &offset);
4248         do {
4249                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4250                         break;
4251
4252                 tries++;
4253         } while (tries < max_tries);
4254
4255         return offset;
4256 }
4257
4258 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4259 {
4260         u32 next_offset = BIT(31) - 1;
4261         int i;
4262
4263         data->absent = 0;
4264         data->has_next_tsf = false;
4265         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4266                 s32 start;
4267
4268                 if (!data->count[i])
4269                         continue;
4270
4271                 ieee80211_extend_noa_desc(data, tsf, i);
4272                 start = data->desc[i].start - tsf;
4273                 if (start <= 0)
4274                         data->absent |= BIT(i);
4275
4276                 if (next_offset > start)
4277                         next_offset = start;
4278
4279                 data->has_next_tsf = true;
4280         }
4281
4282         if (data->absent)
4283                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4284
4285         data->next_tsf = tsf + next_offset;
4286 }
4287 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4288
4289 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4290                             struct ieee80211_noa_data *data, u32 tsf)
4291 {
4292         int ret = 0;
4293         int i;
4294
4295         memset(data, 0, sizeof(*data));
4296
4297         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4298                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4299
4300                 if (!desc->count || !desc->duration)
4301                         continue;
4302
4303                 data->count[i] = desc->count;
4304                 data->desc[i].start = le32_to_cpu(desc->start_time);
4305                 data->desc[i].duration = le32_to_cpu(desc->duration);
4306                 data->desc[i].interval = le32_to_cpu(desc->interval);
4307
4308                 if (data->count[i] > 1 &&
4309                     data->desc[i].interval < data->desc[i].duration)
4310                         continue;
4311
4312                 ieee80211_extend_noa_desc(data, tsf, i);
4313                 ret++;
4314         }
4315
4316         if (ret)
4317                 ieee80211_update_p2p_noa(data, tsf);
4318
4319         return ret;
4320 }
4321 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4322
4323 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4324                            struct ieee80211_sub_if_data *sdata)
4325 {
4326         u64 tsf = drv_get_tsf(local, sdata);
4327         u64 dtim_count = 0;
4328         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4329         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4330         struct ps_data *ps;
4331         u8 bcns_from_dtim;
4332
4333         if (tsf == -1ULL || !beacon_int || !dtim_period)
4334                 return;
4335
4336         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4337             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4338                 if (!sdata->bss)
4339                         return;
4340
4341                 ps = &sdata->bss->ps;
4342         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4343                 ps = &sdata->u.mesh.ps;
4344         } else {
4345                 return;
4346         }
4347
4348         /*
4349          * actually finds last dtim_count, mac80211 will update in
4350          * __beacon_add_tim().
4351          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4352          */
4353         do_div(tsf, beacon_int);
4354         bcns_from_dtim = do_div(tsf, dtim_period);
4355         /* just had a DTIM */
4356         if (!bcns_from_dtim)
4357                 dtim_count = 0;
4358         else
4359                 dtim_count = dtim_period - bcns_from_dtim;
4360
4361         ps->dtim_count = dtim_count;
4362 }
4363
4364 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4365                                          struct ieee80211_chanctx *ctx)
4366 {
4367         struct ieee80211_sub_if_data *sdata;
4368         u8 radar_detect = 0;
4369
4370         lockdep_assert_held(&local->chanctx_mtx);
4371
4372         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4373                 return 0;
4374
4375         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4376                 if (sdata->reserved_radar_required)
4377                         radar_detect |= BIT(sdata->reserved_chandef.width);
4378
4379         /*
4380          * An in-place reservation context should not have any assigned vifs
4381          * until it replaces the other context.
4382          */
4383         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4384                 !list_empty(&ctx->assigned_vifs));
4385
4386         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4387                 if (sdata->radar_required)
4388                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4389
4390         return radar_detect;
4391 }
4392
4393 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4394                                  const struct cfg80211_chan_def *chandef,
4395                                  enum ieee80211_chanctx_mode chanmode,
4396                                  u8 radar_detect)
4397 {
4398         struct ieee80211_local *local = sdata->local;
4399         struct ieee80211_sub_if_data *sdata_iter;
4400         enum nl80211_iftype iftype = sdata->wdev.iftype;
4401         struct ieee80211_chanctx *ctx;
4402         int total = 1;
4403         struct iface_combination_params params = {
4404                 .radar_detect = radar_detect,
4405         };
4406
4407         lockdep_assert_held(&local->chanctx_mtx);
4408
4409         if (WARN_ON(hweight32(radar_detect) > 1))
4410                 return -EINVAL;
4411
4412         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4413                     !chandef->chan))
4414                 return -EINVAL;
4415
4416         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4417                 return -EINVAL;
4418
4419         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4420             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4421                 /*
4422                  * always passing this is harmless, since it'll be the
4423                  * same value that cfg80211 finds if it finds the same
4424                  * interface ... and that's always allowed
4425                  */
4426                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4427         }
4428
4429         /* Always allow software iftypes */
4430         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4431                 if (radar_detect)
4432                         return -EINVAL;
4433                 return 0;
4434         }
4435
4436         if (chandef)
4437                 params.num_different_channels = 1;
4438
4439         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4440                 params.iftype_num[iftype] = 1;
4441
4442         list_for_each_entry(ctx, &local->chanctx_list, list) {
4443                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4444                         continue;
4445                 params.radar_detect |=
4446                         ieee80211_chanctx_radar_detect(local, ctx);
4447                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4448                         params.num_different_channels++;
4449                         continue;
4450                 }
4451                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4452                     cfg80211_chandef_compatible(chandef,
4453                                                 &ctx->conf.def))
4454                         continue;
4455                 params.num_different_channels++;
4456         }
4457
4458         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4459                 struct wireless_dev *wdev_iter;
4460
4461                 wdev_iter = &sdata_iter->wdev;
4462
4463                 if (sdata_iter == sdata ||
4464                     !ieee80211_sdata_running(sdata_iter) ||
4465                     cfg80211_iftype_allowed(local->hw.wiphy,
4466                                             wdev_iter->iftype, 0, 1))
4467                         continue;
4468
4469                 params.iftype_num[wdev_iter->iftype]++;
4470                 total++;
4471         }
4472
4473         if (total == 1 && !params.radar_detect)
4474                 return 0;
4475
4476         return cfg80211_check_combinations(local->hw.wiphy, &params);
4477 }
4478
4479 static void
4480 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4481                          void *data)
4482 {
4483         u32 *max_num_different_channels = data;
4484
4485         *max_num_different_channels = max(*max_num_different_channels,
4486                                           c->num_different_channels);
4487 }
4488
4489 int ieee80211_max_num_channels(struct ieee80211_local *local)
4490 {
4491         struct ieee80211_sub_if_data *sdata;
4492         struct ieee80211_chanctx *ctx;
4493         u32 max_num_different_channels = 1;
4494         int err;
4495         struct iface_combination_params params = {0};
4496
4497         lockdep_assert_held(&local->chanctx_mtx);
4498
4499         list_for_each_entry(ctx, &local->chanctx_list, list) {
4500                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4501                         continue;
4502
4503                 params.num_different_channels++;
4504
4505                 params.radar_detect |=
4506                         ieee80211_chanctx_radar_detect(local, ctx);
4507         }
4508
4509         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4510                 params.iftype_num[sdata->wdev.iftype]++;
4511
4512         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4513                                          ieee80211_iter_max_chans,
4514                                          &max_num_different_channels);
4515         if (err < 0)
4516                 return err;
4517
4518         return max_num_different_channels;
4519 }
4520
4521 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4522                                 struct ieee80211_sta_s1g_cap *caps,
4523                                 struct sk_buff *skb)
4524 {
4525         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4526         struct ieee80211_s1g_cap s1g_capab;
4527         u8 *pos;
4528         int i;
4529
4530         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4531                 return;
4532
4533         if (!caps->s1g)
4534                 return;
4535
4536         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4537         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4538
4539         /* override the capability info */
4540         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4541                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4542
4543                 s1g_capab.capab_info[i] &= ~mask;
4544                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4545         }
4546
4547         /* then MCS and NSS set */
4548         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4549                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4550
4551                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4552                 s1g_capab.supp_mcs_nss[i] |=
4553                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4554         }
4555
4556         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4557         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4558         *pos++ = sizeof(s1g_capab);
4559
4560         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4561 }
4562
4563 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4564                                   struct sk_buff *skb)
4565 {
4566         u8 *pos = skb_put(skb, 3);
4567
4568         *pos++ = WLAN_EID_AID_REQUEST;
4569         *pos++ = 1;
4570         *pos++ = 0;
4571 }
4572
4573 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4574 {
4575         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4576         *buf++ = 7; /* len */
4577         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4578         *buf++ = 0x50;
4579         *buf++ = 0xf2;
4580         *buf++ = 2; /* WME */
4581         *buf++ = 0; /* WME info */
4582         *buf++ = 1; /* WME ver */
4583         *buf++ = qosinfo; /* U-APSD no in use */
4584
4585         return buf;
4586 }
4587
4588 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4589                              unsigned long *frame_cnt,
4590                              unsigned long *byte_cnt)
4591 {
4592         struct txq_info *txqi = to_txq_info(txq);
4593         u32 frag_cnt = 0, frag_bytes = 0;
4594         struct sk_buff *skb;
4595
4596         skb_queue_walk(&txqi->frags, skb) {
4597                 frag_cnt++;
4598                 frag_bytes += skb->len;
4599         }
4600
4601         if (frame_cnt)
4602                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4603
4604         if (byte_cnt)
4605                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4606 }
4607 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4608
4609 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4610         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4611         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4612         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4613         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4614 };
4615
4616 u16 ieee80211_encode_usf(int listen_interval)
4617 {
4618         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4619         u16 ui, usf = 0;
4620
4621         /* find greatest USF */
4622         while (usf < IEEE80211_MAX_USF) {
4623                 if (listen_interval % listen_int_usf[usf + 1])
4624                         break;
4625                 usf += 1;
4626         }
4627         ui = listen_interval / listen_int_usf[usf];
4628
4629         /* error if there is a remainder. Should've been checked by user */
4630         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4631         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4632                           FIELD_PREP(LISTEN_INT_UI, ui);
4633
4634         return (u16) listen_interval;
4635 }