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) 2018-2023 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 #include <kunit/visibility.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  50                         enum nl80211_iftype type)
  51 {
  52         __le16 fc = hdr->frame_control;
  53
  54         if (ieee80211_is_data(fc)) {
  55                 if (len < 24) /* drop incorrect hdr len (data) */
  56                         return NULL;
  57
  58                 if (ieee80211_has_a4(fc))
  59                         return NULL;
  60                 if (ieee80211_has_tods(fc))
  61                         return hdr->addr1;
  62                 if (ieee80211_has_fromds(fc))
  63                         return hdr->addr2;
  64
  65                 return hdr->addr3;
  66         }
  67
  68         if (ieee80211_is_s1g_beacon(fc)) {
  69                 struct ieee80211_ext *ext = (void *) hdr;
  70
  71                 return ext->u.s1g_beacon.sa;
  72         }
  73
  74         if (ieee80211_is_mgmt(fc)) {
  75                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  76                         return NULL;
  77                 return hdr->addr3;
  78         }
  79
  80         if (ieee80211_is_ctl(fc)) {
  81                 if (ieee80211_is_pspoll(fc))
  82                         return hdr->addr1;
  83
  84                 if (ieee80211_is_back_req(fc)) {
  85                         switch (type) {
  86                         case NL80211_IFTYPE_STATION:
  87                                 return hdr->addr2;
  88                         case NL80211_IFTYPE_AP:
  89                         case NL80211_IFTYPE_AP_VLAN:
  90                                 return hdr->addr1;
  91                         default:
  92                                 break; /* fall through to the return */
  93                         }
  94                 }
  95         }
  96
  97         return NULL;
  98 }
  99 EXPORT_SYMBOL(ieee80211_get_bssid);
 100
 101 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 102 {
 103         struct sk_buff *skb;
 104         struct ieee80211_hdr *hdr;
 105
 106         skb_queue_walk(&tx->skbs, skb) {
 107                 hdr = (struct ieee80211_hdr *) skb->data;
 108                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 109         }
 110 }
 111
 112 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 113                              int rate, int erp, int short_preamble)
 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
 126         if (band == NL80211_BAND_5GHZ || erp) {
 127                 /*
 128                  * OFDM:
 129                  *
 130                  * N_DBPS = DATARATE x 4
 131                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 132                  *      (16 = SIGNAL time, 6 = tail bits)
 133                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 134                  *
 135                  * T_SYM = 4 usec
 136                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 137                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 138                  *      signal ext = 6 usec
 139                  */
 140                 dur = 16; /* SIFS + signal ext */
 141                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 142                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 143
 144                 /* rates should already consider the channel bandwidth,
 145                  * don't apply divisor again.
 146                  */
 147                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 148                                         4 * rate); /* T_SYM x N_SYM */
 149         } else {
 150                 /*
 151                  * 802.11b or 802.11g with 802.11b compatibility:
 152                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 153                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 154                  *
 155                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 156                  * aSIFSTime = 10 usec
 157                  * aPreambleLength = 144 usec or 72 usec with short preamble
 158                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 159                  */
 160                 dur = 10; /* aSIFSTime = 10 usec */
 161                 dur += short_preamble ? (72 + 24) : (144 + 48);
 162
 163                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 164         }
 165
 166         return dur;
 167 }
 168
 169 /* Exported duration function for driver use */
 170 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 171                                         struct ieee80211_vif *vif,
 172                                         enum nl80211_band band,
 173                                         size_t frame_len,
 174                                         struct ieee80211_rate *rate)
 175 {
 176         struct ieee80211_sub_if_data *sdata;
 177         u16 dur;
 178         int erp;
 179         bool short_preamble = false;
 180
 181         erp = 0;
 182         if (vif) {
 183                 sdata = vif_to_sdata(vif);
 184                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 185                 if (sdata->deflink.operating_11g_mode)
 186                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 187         }
 188
 189         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 190                                        short_preamble);
 191
 192         return cpu_to_le16(dur);
 193 }
 194 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 195
 196 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 197                               struct ieee80211_vif *vif, size_t frame_len,
 198                               const struct ieee80211_tx_info *frame_txctl)
 199 {
 200         struct ieee80211_local *local = hw_to_local(hw);
 201         struct ieee80211_rate *rate;
 202         struct ieee80211_sub_if_data *sdata;
 203         bool short_preamble;
 204         int erp, bitrate;
 205         u16 dur;
 206         struct ieee80211_supported_band *sband;
 207
 208         sband = local->hw.wiphy->bands[frame_txctl->band];
 209
 210         short_preamble = false;
 211
 212         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 213
 214         erp = 0;
 215         if (vif) {
 216                 sdata = vif_to_sdata(vif);
 217                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 218                 if (sdata->deflink.operating_11g_mode)
 219                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 220         }
 221
 222         bitrate = rate->bitrate;
 223
 224         /* CTS duration */
 225         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 226                                        erp, short_preamble);
 227         /* Data frame duration */
 228         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 229                                         erp, short_preamble);
 230         /* ACK duration */
 231         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                         erp, short_preamble);
 233
 234         return cpu_to_le16(dur);
 235 }
 236 EXPORT_SYMBOL(ieee80211_rts_duration);
 237
 238 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 239                                     struct ieee80211_vif *vif,
 240                                     size_t frame_len,
 241                                     const struct ieee80211_tx_info *frame_txctl)
 242 {
 243         struct ieee80211_local *local = hw_to_local(hw);
 244         struct ieee80211_rate *rate;
 245         struct ieee80211_sub_if_data *sdata;
 246         bool short_preamble;
 247         int erp, bitrate;
 248         u16 dur;
 249         struct ieee80211_supported_band *sband;
 250
 251         sband = local->hw.wiphy->bands[frame_txctl->band];
 252
 253         short_preamble = false;
 254
 255         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 256         erp = 0;
 257         if (vif) {
 258                 sdata = vif_to_sdata(vif);
 259                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 260                 if (sdata->deflink.operating_11g_mode)
 261                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 262         }
 263
 264         bitrate = rate->bitrate;
 265
 266         /* Data frame duration */
 267         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 268                                        erp, short_preamble);
 269         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 270                 /* ACK duration */
 271                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 272                                                 erp, short_preamble);
 273         }
 274
 275         return cpu_to_le16(dur);
 276 }
 277 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 278
 279 static void wake_tx_push_queue(struct ieee80211_local *local,
 280                                struct ieee80211_sub_if_data *sdata,
 281                                struct ieee80211_txq *queue)
 282 {
 283         struct ieee80211_tx_control control = {
 284                 .sta = queue->sta,
 285         };
 286         struct sk_buff *skb;
 287
 288         while (1) {
 289                 skb = ieee80211_tx_dequeue(&local->hw, queue);
 290                 if (!skb)
 291                         break;
 292
 293                 drv_tx(local, &control, skb);
 294         }
 295 }
 296
 297 /* wake_tx_queue handler for driver not implementing a custom one*/
 298 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
 299                                     struct ieee80211_txq *txq)
 300 {
 301         struct ieee80211_local *local = hw_to_local(hw);
 302         struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
 303         struct ieee80211_txq *queue;
 304
 305         spin_lock(&local->handle_wake_tx_queue_lock);
 306
 307         /* Use ieee80211_next_txq() for airtime fairness accounting */
 308         ieee80211_txq_schedule_start(hw, txq->ac);
 309         while ((queue = ieee80211_next_txq(hw, txq->ac))) {
 310                 wake_tx_push_queue(local, sdata, queue);
 311                 ieee80211_return_txq(hw, queue, false);
 312         }
 313         ieee80211_txq_schedule_end(hw, txq->ac);
 314         spin_unlock(&local->handle_wake_tx_queue_lock);
 315 }
 316 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
 317
 318 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 319 {
 320         struct ieee80211_local *local = sdata->local;
 321         struct ieee80211_vif *vif = &sdata->vif;
 322         struct fq *fq = &local->fq;
 323         struct ps_data *ps = NULL;
 324         struct txq_info *txqi;
 325         struct sta_info *sta;
 326         int i;
 327
 328         local_bh_disable();
 329         spin_lock(&fq->lock);
 330
 331         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 332                 goto out;
 333
 334         if (sdata->vif.type == NL80211_IFTYPE_AP)
 335                 ps = &sdata->bss->ps;
 336
 337         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 338                 if (sdata != sta->sdata)
 339                         continue;
 340
 341                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 342                         struct ieee80211_txq *txq = sta->sta.txq[i];
 343
 344                         if (!txq)
 345                                 continue;
 346
 347                         txqi = to_txq_info(txq);
 348
 349                         if (ac != txq->ac)
 350                                 continue;
 351
 352                         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
 353                                                 &txqi->flags))
 354                                 continue;
 355
 356                         spin_unlock(&fq->lock);
 357                         drv_wake_tx_queue(local, txqi);
 358                         spin_lock(&fq->lock);
 359                 }
 360         }
 361
 362         if (!vif->txq)
 363                 goto out;
 364
 365         txqi = to_txq_info(vif->txq);
 366
 367         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
 368             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 369                 goto out;
 370
 371         spin_unlock(&fq->lock);
 372
 373         drv_wake_tx_queue(local, txqi);
 374         local_bh_enable();
 375         return;
 376 out:
 377         spin_unlock(&fq->lock);
 378         local_bh_enable();
 379 }
 380
 381 static void
 382 __releases(&local->queue_stop_reason_lock)
 383 __acquires(&local->queue_stop_reason_lock)
 384 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 385 {
 386         struct ieee80211_sub_if_data *sdata;
 387         int n_acs = IEEE80211_NUM_ACS;
 388         int i;
 389
 390         rcu_read_lock();
 391
 392         if (local->hw.queues < IEEE80211_NUM_ACS)
 393                 n_acs = 1;
 394
 395         for (i = 0; i < local->hw.queues; i++) {
 396                 if (local->queue_stop_reasons[i])
 397                         continue;
 398
 399                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 400                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 401                         int ac;
 402
 403                         for (ac = 0; ac < n_acs; ac++) {
 404                                 int ac_queue = sdata->vif.hw_queue[ac];
 405
 406                                 if (ac_queue == i ||
 407                                     sdata->vif.cab_queue == i)
 408                                         __ieee80211_wake_txqs(sdata, ac);
 409                         }
 410                 }
 411                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 412         }
 413
 414         rcu_read_unlock();
 415 }
 416
 417 void ieee80211_wake_txqs(struct tasklet_struct *t)
 418 {
 419         struct ieee80211_local *local = from_tasklet(local, t,
 420                                                      wake_txqs_tasklet);
 421         unsigned long flags;
 422
 423         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 424         _ieee80211_wake_txqs(local, &flags);
 425         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 426 }
 427
 428 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 429                                    enum queue_stop_reason reason,
 430                                    bool refcounted,
 431                                    unsigned long *flags)
 432 {
 433         struct ieee80211_local *local = hw_to_local(hw);
 434
 435         trace_wake_queue(local, queue, reason);
 436
 437         if (WARN_ON(queue >= hw->queues))
 438                 return;
 439
 440         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 441                 return;
 442
 443         if (!refcounted) {
 444                 local->q_stop_reasons[queue][reason] = 0;
 445         } else {
 446                 local->q_stop_reasons[queue][reason]--;
 447                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 448                         local->q_stop_reasons[queue][reason] = 0;
 449         }
 450
 451         if (local->q_stop_reasons[queue][reason] == 0)
 452                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 453
 454         if (local->queue_stop_reasons[queue] != 0)
 455                 /* someone still has this queue stopped */
 456                 return;
 457
 458         if (!skb_queue_empty(&local->pending[queue]))
 459                 tasklet_schedule(&local->tx_pending_tasklet);
 460
 461         /*
 462          * Calling _ieee80211_wake_txqs here can be a problem because it may
 463          * release queue_stop_reason_lock which has been taken by
 464          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 465          * release someone's lock, but it is fine because all the callers of
 466          * __ieee80211_wake_queue call it right before releasing the lock.
 467          */
 468         if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 469                 tasklet_schedule(&local->wake_txqs_tasklet);
 470         else
 471                 _ieee80211_wake_txqs(local, flags);
 472 }
 473
 474 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 475                                     enum queue_stop_reason reason,
 476                                     bool refcounted)
 477 {
 478         struct ieee80211_local *local = hw_to_local(hw);
 479         unsigned long flags;
 480
 481         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 482         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 483         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 484 }
 485
 486 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 487 {
 488         ieee80211_wake_queue_by_reason(hw, queue,
 489                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 490                                        false);
 491 }
 492 EXPORT_SYMBOL(ieee80211_wake_queue);
 493
 494 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 495                                    enum queue_stop_reason reason,
 496                                    bool refcounted)
 497 {
 498         struct ieee80211_local *local = hw_to_local(hw);
 499
 500         trace_stop_queue(local, queue, reason);
 501
 502         if (WARN_ON(queue >= hw->queues))
 503                 return;
 504
 505         if (!refcounted)
 506                 local->q_stop_reasons[queue][reason] = 1;
 507         else
 508                 local->q_stop_reasons[queue][reason]++;
 509
 510         set_bit(reason, &local->queue_stop_reasons[queue]);
 511 }
 512
 513 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 514                                     enum queue_stop_reason reason,
 515                                     bool refcounted)
 516 {
 517         struct ieee80211_local *local = hw_to_local(hw);
 518         unsigned long flags;
 519
 520         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 521         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 522         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 523 }
 524
 525 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 526 {
 527         ieee80211_stop_queue_by_reason(hw, queue,
 528                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 529                                        false);
 530 }
 531 EXPORT_SYMBOL(ieee80211_stop_queue);
 532
 533 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 534                                struct sk_buff *skb)
 535 {
 536         struct ieee80211_hw *hw = &local->hw;
 537         unsigned long flags;
 538         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 539         int queue = info->hw_queue;
 540
 541         if (WARN_ON(!info->control.vif)) {
 542                 ieee80211_free_txskb(&local->hw, skb);
 543                 return;
 544         }
 545
 546         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 547         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 548                                false);
 549         __skb_queue_tail(&local->pending[queue], skb);
 550         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 551                                false, &flags);
 552         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 553 }
 554
 555 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 556                                 struct sk_buff_head *skbs)
 557 {
 558         struct ieee80211_hw *hw = &local->hw;
 559         struct sk_buff *skb;
 560         unsigned long flags;
 561         int queue, i;
 562
 563         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 564         while ((skb = skb_dequeue(skbs))) {
 565                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 566
 567                 if (WARN_ON(!info->control.vif)) {
 568                         ieee80211_free_txskb(&local->hw, skb);
 569                         continue;
 570                 }
 571
 572                 queue = info->hw_queue;
 573
 574                 __ieee80211_stop_queue(hw, queue,
 575                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 576                                 false);
 577
 578                 __skb_queue_tail(&local->pending[queue], skb);
 579         }
 580
 581         for (i = 0; i < hw->queues; i++)
 582                 __ieee80211_wake_queue(hw, i,
 583                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 584                         false, &flags);
 585         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 586 }
 587
 588 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 589                                      unsigned long queues,
 590                                      enum queue_stop_reason reason,
 591                                      bool refcounted)
 592 {
 593         struct ieee80211_local *local = hw_to_local(hw);
 594         unsigned long flags;
 595         int i;
 596
 597         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 598
 599         for_each_set_bit(i, &queues, hw->queues)
 600                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 601
 602         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 603 }
 604
 605 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 606 {
 607         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 608                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 609                                         false);
 610 }
 611 EXPORT_SYMBOL(ieee80211_stop_queues);
 612
 613 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 614 {
 615         struct ieee80211_local *local = hw_to_local(hw);
 616         unsigned long flags;
 617         int ret;
 618
 619         if (WARN_ON(queue >= hw->queues))
 620                 return true;
 621
 622         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 623         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 624                        &local->queue_stop_reasons[queue]);
 625         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 626         return ret;
 627 }
 628 EXPORT_SYMBOL(ieee80211_queue_stopped);
 629
 630 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 631                                      unsigned long queues,
 632                                      enum queue_stop_reason reason,
 633                                      bool refcounted)
 634 {
 635         struct ieee80211_local *local = hw_to_local(hw);
 636         unsigned long flags;
 637         int i;
 638
 639         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 640
 641         for_each_set_bit(i, &queues, hw->queues)
 642                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 643
 644         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 645 }
 646
 647 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 648 {
 649         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 650                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 651                                         false);
 652 }
 653 EXPORT_SYMBOL(ieee80211_wake_queues);
 654
 655 static unsigned int
 656 ieee80211_get_vif_queues(struct ieee80211_local *local,
 657                          struct ieee80211_sub_if_data *sdata)
 658 {
 659         unsigned int queues;
 660
 661         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 662                 int ac;
 663
 664                 queues = 0;
 665
 666                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 667                         queues |= BIT(sdata->vif.hw_queue[ac]);
 668                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 669                         queues |= BIT(sdata->vif.cab_queue);
 670         } else {
 671                 /* all queues */
 672                 queues = BIT(local->hw.queues) - 1;
 673         }
 674
 675         return queues;
 676 }
 677
 678 void __ieee80211_flush_queues(struct ieee80211_local *local,
 679                               struct ieee80211_sub_if_data *sdata,
 680                               unsigned int queues, bool drop)
 681 {
 682         if (!local->ops->flush)
 683                 return;
 684
 685         /*
 686          * If no queue was set, or if the HW doesn't support
 687          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 688          */
 689         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 690                 queues = ieee80211_get_vif_queues(local, sdata);
 691
 692         ieee80211_stop_queues_by_reason(&local->hw, queues,
 693                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 694                                         false);
 695
 696         if (drop) {
 697                 struct sta_info *sta;
 698
 699                 /* Purge the queues, so the frames on them won't be
 700                  * sent during __ieee80211_wake_queue()
 701                  */
 702                 list_for_each_entry(sta, &local->sta_list, list) {
 703                         if (sdata != sta->sdata)
 704                                 continue;
 705                         ieee80211_purge_sta_txqs(sta);
 706                 }
 707         }
 708
 709         drv_flush(local, sdata, queues, drop);
 710
 711         ieee80211_wake_queues_by_reason(&local->hw, queues,
 712                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 713                                         false);
 714 }
 715
 716 void ieee80211_flush_queues(struct ieee80211_local *local,
 717                             struct ieee80211_sub_if_data *sdata, bool drop)
 718 {
 719         __ieee80211_flush_queues(local, sdata, 0, drop);
 720 }
 721
 722 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 723                                struct ieee80211_sub_if_data *sdata,
 724                                enum queue_stop_reason reason)
 725 {
 726         ieee80211_stop_queues_by_reason(&local->hw,
 727                                         ieee80211_get_vif_queues(local, sdata),
 728                                         reason, true);
 729 }
 730
 731 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 732                                struct ieee80211_sub_if_data *sdata,
 733                                enum queue_stop_reason reason)
 734 {
 735         ieee80211_wake_queues_by_reason(&local->hw,
 736                                         ieee80211_get_vif_queues(local, sdata),
 737                                         reason, true);
 738 }
 739
 740 static void __iterate_interfaces(struct ieee80211_local *local,
 741                                  u32 iter_flags,
 742                                  void (*iterator)(void *data, u8 *mac,
 743                                                   struct ieee80211_vif *vif),
 744                                  void *data)
 745 {
 746         struct ieee80211_sub_if_data *sdata;
 747         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 748
 749         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 750                 switch (sdata->vif.type) {
 751                 case NL80211_IFTYPE_MONITOR:
 752                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 753                                 continue;
 754                         break;
 755                 case NL80211_IFTYPE_AP_VLAN:
 756                         continue;
 757                 default:
 758                         break;
 759                 }
 760                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 761                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 762                         continue;
 763                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 764                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 765                         continue;
 766                 if (ieee80211_sdata_running(sdata) || !active_only)
 767                         iterator(data, sdata->vif.addr,
 768                                  &sdata->vif);
 769         }
 770
 771         sdata = rcu_dereference_check(local->monitor_sdata,
 772                                       lockdep_is_held(&local->iflist_mtx) ||
 773                                       lockdep_is_held(&local->hw.wiphy->mtx));
 774         if (sdata &&
 775             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 776              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 777                 iterator(data, sdata->vif.addr, &sdata->vif);
 778 }
 779
 780 void ieee80211_iterate_interfaces(
 781         struct ieee80211_hw *hw, u32 iter_flags,
 782         void (*iterator)(void *data, u8 *mac,
 783                          struct ieee80211_vif *vif),
 784         void *data)
 785 {
 786         struct ieee80211_local *local = hw_to_local(hw);
 787
 788         mutex_lock(&local->iflist_mtx);
 789         __iterate_interfaces(local, iter_flags, iterator, data);
 790         mutex_unlock(&local->iflist_mtx);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 793
 794 void ieee80211_iterate_active_interfaces_atomic(
 795         struct ieee80211_hw *hw, u32 iter_flags,
 796         void (*iterator)(void *data, u8 *mac,
 797                          struct ieee80211_vif *vif),
 798         void *data)
 799 {
 800         struct ieee80211_local *local = hw_to_local(hw);
 801
 802         rcu_read_lock();
 803         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 804                              iterator, data);
 805         rcu_read_unlock();
 806 }
 807 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 808
 809 void ieee80211_iterate_active_interfaces_mtx(
 810         struct ieee80211_hw *hw, u32 iter_flags,
 811         void (*iterator)(void *data, u8 *mac,
 812                          struct ieee80211_vif *vif),
 813         void *data)
 814 {
 815         struct ieee80211_local *local = hw_to_local(hw);
 816
 817         lockdep_assert_wiphy(hw->wiphy);
 818
 819         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 820                              iterator, data);
 821 }
 822 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 823
 824 static void __iterate_stations(struct ieee80211_local *local,
 825                                void (*iterator)(void *data,
 826                                                 struct ieee80211_sta *sta),
 827                                void *data)
 828 {
 829         struct sta_info *sta;
 830
 831         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 832                 if (!sta->uploaded)
 833                         continue;
 834
 835                 iterator(data, &sta->sta);
 836         }
 837 }
 838
 839 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 840                         void (*iterator)(void *data,
 841                                          struct ieee80211_sta *sta),
 842                         void *data)
 843 {
 844         struct ieee80211_local *local = hw_to_local(hw);
 845
 846         rcu_read_lock();
 847         __iterate_stations(local, iterator, data);
 848         rcu_read_unlock();
 849 }
 850 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 851
 852 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 853 {
 854         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 855
 856         if (!ieee80211_sdata_running(sdata) ||
 857             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 858                 return NULL;
 859         return &sdata->vif;
 860 }
 861 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 862
 863 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 864 {
 865         if (!vif)
 866                 return NULL;
 867
 868         return &vif_to_sdata(vif)->wdev;
 869 }
 870 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 871
 872 /*
 873  * Nothing should have been stuffed into the workqueue during
 874  * the suspend->resume cycle. Since we can't check each caller
 875  * of this function if we are already quiescing / suspended,
 876  * check here and don't WARN since this can actually happen when
 877  * the rx path (for example) is racing against __ieee80211_suspend
 878  * and suspending / quiescing was set after the rx path checked
 879  * them.
 880  */
 881 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 882 {
 883         if (local->quiescing || (local->suspended && !local->resuming)) {
 884                 pr_warn("queueing ieee80211 work while going to suspend\n");
 885                 return false;
 886         }
 887
 888         return true;
 889 }
 890
 891 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 892 {
 893         struct ieee80211_local *local = hw_to_local(hw);
 894
 895         if (!ieee80211_can_queue_work(local))
 896                 return;
 897
 898         queue_work(local->workqueue, work);
 899 }
 900 EXPORT_SYMBOL(ieee80211_queue_work);
 901
 902 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 903                                   struct delayed_work *dwork,
 904                                   unsigned long delay)
 905 {
 906         struct ieee80211_local *local = hw_to_local(hw);
 907
 908         if (!ieee80211_can_queue_work(local))
 909                 return;
 910
 911         queue_delayed_work(local->workqueue, dwork, delay);
 912 }
 913 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 914
 915 static void
 916 ieee80211_parse_extension_element(u32 *crc,
 917                                   const struct element *elem,
 918                                   struct ieee802_11_elems *elems,
 919                                   struct ieee80211_elems_parse_params *params)
 920 {
 921         const void *data = elem->data + 1;
 922         bool calc_crc = false;
 923         u8 len;
 924
 925         if (!elem->datalen)
 926                 return;
 927
 928         len = elem->datalen - 1;
 929
 930         switch (elem->data[0]) {
 931         case WLAN_EID_EXT_HE_MU_EDCA:
 932                 calc_crc = true;
 933                 if (len >= sizeof(*elems->mu_edca_param_set))
 934                         elems->mu_edca_param_set = data;
 935                 break;
 936         case WLAN_EID_EXT_HE_CAPABILITY:
 937                 if (ieee80211_he_capa_size_ok(data, len)) {
 938                         elems->he_cap = data;
 939                         elems->he_cap_len = len;
 940                 }
 941                 break;
 942         case WLAN_EID_EXT_HE_OPERATION:
 943                 calc_crc = true;
 944                 if (len >= sizeof(*elems->he_operation) &&
 945                     len >= ieee80211_he_oper_size(data) - 1)
 946                         elems->he_operation = data;
 947                 break;
 948         case WLAN_EID_EXT_UORA:
 949                 if (len >= 1)
 950                         elems->uora_element = data;
 951                 break;
 952         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 953                 if (len == 3)
 954                         elems->max_channel_switch_time = data;
 955                 break;
 956         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 957                 if (len >= sizeof(*elems->mbssid_config_ie))
 958                         elems->mbssid_config_ie = data;
 959                 break;
 960         case WLAN_EID_EXT_HE_SPR:
 961                 if (len >= sizeof(*elems->he_spr) &&
 962                     len >= ieee80211_he_spr_size(data))
 963                         elems->he_spr = data;
 964                 break;
 965         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 966                 if (len >= sizeof(*elems->he_6ghz_capa))
 967                         elems->he_6ghz_capa = data;
 968                 break;
 969         case WLAN_EID_EXT_EHT_CAPABILITY:
 970                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
 971                                                data, len,
 972                                                params->from_ap)) {
 973                         elems->eht_cap = data;
 974                         elems->eht_cap_len = len;
 975                 }
 976                 break;
 977         case WLAN_EID_EXT_EHT_OPERATION:
 978                 if (ieee80211_eht_oper_size_ok(data, len))
 979                         elems->eht_operation = data;
 980                 calc_crc = true;
 981                 break;
 982         case WLAN_EID_EXT_EHT_MULTI_LINK:
 983                 calc_crc = true;
 984
 985                 if (ieee80211_mle_size_ok(data, len)) {
 986                         const struct ieee80211_multi_link_elem *mle =
 987                                 (void *)data;
 988
 989                         switch (le16_get_bits(mle->control,
 990                                               IEEE80211_ML_CONTROL_TYPE)) {
 991                         case IEEE80211_ML_CONTROL_TYPE_BASIC:
 992                                 elems->ml_basic_elem = (void *)elem;
 993                                 elems->ml_basic = data;
 994                                 elems->ml_basic_len = len;
 995                                 break;
 996                         case IEEE80211_ML_CONTROL_TYPE_RECONF:
 997                                 elems->ml_reconf_elem = (void *)elem;
 998                                 elems->ml_reconf = data;
 999                                 elems->ml_reconf_len = len;
1000                                 break;
1001                         default:
1002                                 break;
1003                         }
1004                 }
1005                 break;
1006         case WLAN_EID_EXT_BANDWIDTH_INDICATION:
1007                 if (ieee80211_bandwidth_indication_size_ok(data, len))
1008                         elems->bandwidth_indication = data;
1009                 calc_crc = true;
1010                 break;
1011         case WLAN_EID_EXT_TID_TO_LINK_MAPPING:
1012                 calc_crc = true;
1013                 if (ieee80211_tid_to_link_map_size_ok(data, len) &&
1014                     elems->ttlm_num < ARRAY_SIZE(elems->ttlm)) {
1015                         elems->ttlm[elems->ttlm_num] = (void *)data;
1016                         elems->ttlm_num++;
1017                 }
1018                 break;
1019         }
1020
1021         if (crc && calc_crc)
1022                 *crc = crc32_be(*crc, (void *)elem, elem->datalen + 2);
1023 }
1024
1025 static u32
1026 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
1027                              struct ieee802_11_elems *elems,
1028                              const struct element *check_inherit)
1029 {
1030         const struct element *elem;
1031         bool calc_crc = params->filter != 0;
1032         DECLARE_BITMAP(seen_elems, 256);
1033         u32 crc = params->crc;
1034
1035         bitmap_zero(seen_elems, 256);
1036
1037         for_each_element(elem, params->start, params->len) {
1038                 const struct element *subelem;
1039                 bool elem_parse_failed;
1040                 u8 id = elem->id;
1041                 u8 elen = elem->datalen;
1042                 const u8 *pos = elem->data;
1043
1044                 if (check_inherit &&
1045                     !cfg80211_is_element_inherited(elem,
1046                                                    check_inherit))
1047                         continue;
1048
1049                 switch (id) {
1050                 case WLAN_EID_SSID:
1051                 case WLAN_EID_SUPP_RATES:
1052                 case WLAN_EID_FH_PARAMS:
1053                 case WLAN_EID_DS_PARAMS:
1054                 case WLAN_EID_CF_PARAMS:
1055                 case WLAN_EID_TIM:
1056                 case WLAN_EID_IBSS_PARAMS:
1057                 case WLAN_EID_CHALLENGE:
1058                 case WLAN_EID_RSN:
1059                 case WLAN_EID_ERP_INFO:
1060                 case WLAN_EID_EXT_SUPP_RATES:
1061                 case WLAN_EID_HT_CAPABILITY:
1062                 case WLAN_EID_HT_OPERATION:
1063                 case WLAN_EID_VHT_CAPABILITY:
1064                 case WLAN_EID_VHT_OPERATION:
1065                 case WLAN_EID_MESH_ID:
1066                 case WLAN_EID_MESH_CONFIG:
1067                 case WLAN_EID_PEER_MGMT:
1068                 case WLAN_EID_PREQ:
1069                 case WLAN_EID_PREP:
1070                 case WLAN_EID_PERR:
1071                 case WLAN_EID_RANN:
1072                 case WLAN_EID_CHANNEL_SWITCH:
1073                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1074                 case WLAN_EID_COUNTRY:
1075                 case WLAN_EID_PWR_CONSTRAINT:
1076                 case WLAN_EID_TIMEOUT_INTERVAL:
1077                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1078                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1079                 case WLAN_EID_CHAN_SWITCH_PARAM:
1080                 case WLAN_EID_EXT_CAPABILITY:
1081                 case WLAN_EID_CHAN_SWITCH_TIMING:
1082                 case WLAN_EID_LINK_ID:
1083                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1084                 case WLAN_EID_RSNX:
1085                 case WLAN_EID_S1G_BCN_COMPAT:
1086                 case WLAN_EID_S1G_CAPABILITIES:
1087                 case WLAN_EID_S1G_OPERATION:
1088                 case WLAN_EID_AID_RESPONSE:
1089                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1090                 /*
1091                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1092                  * that if the content gets bigger it might be needed more than once
1093                  */
1094                         if (test_bit(id, seen_elems)) {
1095                                 elems->parse_error = true;
1096                                 continue;
1097                         }
1098                         break;
1099                 }
1100
1101                 if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1102                         crc = crc32_be(crc, pos - 2, elen + 2);
1103
1104                 elem_parse_failed = false;
1105
1106                 switch (id) {
1107                 case WLAN_EID_LINK_ID:
1108                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1109                                 elem_parse_failed = true;
1110                                 break;
1111                         }
1112                         elems->lnk_id = (void *)(pos - 2);
1113                         break;
1114                 case WLAN_EID_CHAN_SWITCH_TIMING:
1115                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1116                                 elem_parse_failed = true;
1117                                 break;
1118                         }
1119                         elems->ch_sw_timing = (void *)pos;
1120                         break;
1121                 case WLAN_EID_EXT_CAPABILITY:
1122                         elems->ext_capab = pos;
1123                         elems->ext_capab_len = elen;
1124                         break;
1125                 case WLAN_EID_SSID:
1126                         elems->ssid = pos;
1127                         elems->ssid_len = elen;
1128                         break;
1129                 case WLAN_EID_SUPP_RATES:
1130                         elems->supp_rates = pos;
1131                         elems->supp_rates_len = elen;
1132                         break;
1133                 case WLAN_EID_DS_PARAMS:
1134                         if (elen >= 1)
1135                                 elems->ds_params = pos;
1136                         else
1137                                 elem_parse_failed = true;
1138                         break;
1139                 case WLAN_EID_TIM:
1140                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1141                                 elems->tim = (void *)pos;
1142                                 elems->tim_len = elen;
1143                         } else
1144                                 elem_parse_failed = true;
1145                         break;
1146                 case WLAN_EID_VENDOR_SPECIFIC:
1147                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1148                             pos[2] == 0xf2) {
1149                                 /* Microsoft OUI (00:50:F2) */
1150
1151                                 if (calc_crc)
1152                                         crc = crc32_be(crc, pos - 2, elen + 2);
1153
1154                                 if (elen >= 5 && pos[3] == 2) {
1155                                         /* OUI Type 2 - WMM IE */
1156                                         if (pos[4] == 0) {
1157                                                 elems->wmm_info = pos;
1158                                                 elems->wmm_info_len = elen;
1159                                         } else if (pos[4] == 1) {
1160                                                 elems->wmm_param = pos;
1161                                                 elems->wmm_param_len = elen;
1162                                         }
1163                                 }
1164                         }
1165                         break;
1166                 case WLAN_EID_RSN:
1167                         elems->rsn = pos;
1168                         elems->rsn_len = elen;
1169                         break;
1170                 case WLAN_EID_ERP_INFO:
1171                         if (elen >= 1)
1172                                 elems->erp_info = pos;
1173                         else
1174                                 elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_EXT_SUPP_RATES:
1177                         elems->ext_supp_rates = pos;
1178                         elems->ext_supp_rates_len = elen;
1179                         break;
1180                 case WLAN_EID_HT_CAPABILITY:
1181                         if (elen >= sizeof(struct ieee80211_ht_cap))
1182                                 elems->ht_cap_elem = (void *)pos;
1183                         else
1184                                 elem_parse_failed = true;
1185                         break;
1186                 case WLAN_EID_HT_OPERATION:
1187                         if (elen >= sizeof(struct ieee80211_ht_operation))
1188                                 elems->ht_operation = (void *)pos;
1189                         else
1190                                 elem_parse_failed = true;
1191                         break;
1192                 case WLAN_EID_VHT_CAPABILITY:
1193                         if (elen >= sizeof(struct ieee80211_vht_cap))
1194                                 elems->vht_cap_elem = (void *)pos;
1195                         else
1196                                 elem_parse_failed = true;
1197                         break;
1198                 case WLAN_EID_VHT_OPERATION:
1199                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1200                                 elems->vht_operation = (void *)pos;
1201                                 if (calc_crc)
1202                                         crc = crc32_be(crc, pos - 2, elen + 2);
1203                                 break;
1204                         }
1205                         elem_parse_failed = true;
1206                         break;
1207                 case WLAN_EID_OPMODE_NOTIF:
1208                         if (elen > 0) {
1209                                 elems->opmode_notif = pos;
1210                                 if (calc_crc)
1211                                         crc = crc32_be(crc, pos - 2, elen + 2);
1212                                 break;
1213                         }
1214                         elem_parse_failed = true;
1215                         break;
1216                 case WLAN_EID_MESH_ID:
1217                         elems->mesh_id = pos;
1218                         elems->mesh_id_len = elen;
1219                         break;
1220                 case WLAN_EID_MESH_CONFIG:
1221                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1222                                 elems->mesh_config = (void *)pos;
1223                         else
1224                                 elem_parse_failed = true;
1225                         break;
1226                 case WLAN_EID_PEER_MGMT:
1227                         elems->peering = pos;
1228                         elems->peering_len = elen;
1229                         break;
1230                 case WLAN_EID_MESH_AWAKE_WINDOW:
1231                         if (elen >= 2)
1232                                 elems->awake_window = (void *)pos;
1233                         break;
1234                 case WLAN_EID_PREQ:
1235                         elems->preq = pos;
1236                         elems->preq_len = elen;
1237                         break;
1238                 case WLAN_EID_PREP:
1239                         elems->prep = pos;
1240                         elems->prep_len = elen;
1241                         break;
1242                 case WLAN_EID_PERR:
1243                         elems->perr = pos;
1244                         elems->perr_len = elen;
1245                         break;
1246                 case WLAN_EID_RANN:
1247                         if (elen >= sizeof(struct ieee80211_rann_ie))
1248                                 elems->rann = (void *)pos;
1249                         else
1250                                 elem_parse_failed = true;
1251                         break;
1252                 case WLAN_EID_CHANNEL_SWITCH:
1253                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1254                                 elem_parse_failed = true;
1255                                 break;
1256                         }
1257                         elems->ch_switch_ie = (void *)pos;
1258                         break;
1259                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1260                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1261                                 elem_parse_failed = true;
1262                                 break;
1263                         }
1264                         elems->ext_chansw_ie = (void *)pos;
1265                         break;
1266                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1267                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1268                                 elem_parse_failed = true;
1269                                 break;
1270                         }
1271                         elems->sec_chan_offs = (void *)pos;
1272                         break;
1273                 case WLAN_EID_CHAN_SWITCH_PARAM:
1274                         if (elen <
1275                             sizeof(*elems->mesh_chansw_params_ie)) {
1276                                 elem_parse_failed = true;
1277                                 break;
1278                         }
1279                         elems->mesh_chansw_params_ie = (void *)pos;
1280                         break;
1281                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1282                         if (!params->action ||
1283                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1284                                 elem_parse_failed = true;
1285                                 break;
1286                         }
1287                         elems->wide_bw_chansw_ie = (void *)pos;
1288                         break;
1289                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1290                         if (params->action) {
1291                                 elem_parse_failed = true;
1292                                 break;
1293                         }
1294                         /*
1295                          * This is a bit tricky, but as we only care about
1296                          * a few elements, parse them out manually.
1297                          */
1298                         subelem = cfg80211_find_elem(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1299                                                      pos, elen);
1300                         if (subelem) {
1301                                 if (subelem->datalen >= sizeof(*elems->wide_bw_chansw_ie))
1302                                         elems->wide_bw_chansw_ie =
1303                                                 (void *)subelem->data;
1304                                 else
1305                                         elem_parse_failed = true;
1306                         }
1307
1308                         subelem = cfg80211_find_ext_elem(WLAN_EID_EXT_BANDWIDTH_INDICATION,
1309                                                          pos, elen);
1310                         if (subelem) {
1311                                 const void *edata = subelem->data + 1;
1312                                 u8 edatalen = subelem->datalen - 1;
1313
1314                                 if (ieee80211_bandwidth_indication_size_ok(edata,
1315                                                                            edatalen))
1316                                         elems->bandwidth_indication = edata;
1317                                 else
1318                                         elem_parse_failed = true;
1319                         }
1320                         break;
1321                 case WLAN_EID_COUNTRY:
1322                         elems->country_elem = pos;
1323                         elems->country_elem_len = elen;
1324                         break;
1325                 case WLAN_EID_PWR_CONSTRAINT:
1326                         if (elen != 1) {
1327                                 elem_parse_failed = true;
1328                                 break;
1329                         }
1330                         elems->pwr_constr_elem = pos;
1331                         break;
1332                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1333                         /* Lots of different options exist, but we only care
1334                          * about the Dynamic Transmit Power Control element.
1335                          * First check for the Cisco OUI, then for the DTPC
1336                          * tag (0x00).
1337                          */
1338                         if (elen < 4) {
1339                                 elem_parse_failed = true;
1340                                 break;
1341                         }
1342
1343                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1344                             pos[2] != 0x96 || pos[3] != 0x00)
1345                                 break;
1346
1347                         if (elen != 6) {
1348                                 elem_parse_failed = true;
1349                                 break;
1350                         }
1351
1352                         if (calc_crc)
1353                                 crc = crc32_be(crc, pos - 2, elen + 2);
1354
1355                         elems->cisco_dtpc_elem = pos;
1356                         break;
1357                 case WLAN_EID_ADDBA_EXT:
1358                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1359                                 elem_parse_failed = true;
1360                                 break;
1361                         }
1362                         elems->addba_ext_ie = (void *)pos;
1363                         break;
1364                 case WLAN_EID_TIMEOUT_INTERVAL:
1365                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1366                                 elems->timeout_int = (void *)pos;
1367                         else
1368                                 elem_parse_failed = true;
1369                         break;
1370                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1371                         if (elen >= sizeof(*elems->max_idle_period_ie))
1372                                 elems->max_idle_period_ie = (void *)pos;
1373                         break;
1374                 case WLAN_EID_RSNX:
1375                         elems->rsnx = pos;
1376                         elems->rsnx_len = elen;
1377                         break;
1378                 case WLAN_EID_TX_POWER_ENVELOPE:
1379                         if (elen < 1 ||
1380                             elen > sizeof(struct ieee80211_tx_pwr_env))
1381                                 break;
1382
1383                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1384                                 break;
1385
1386                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1387                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1388                         elems->tx_pwr_env_num++;
1389                         break;
1390                 case WLAN_EID_EXTENSION:
1391                         ieee80211_parse_extension_element(calc_crc ?
1392                                                                 &crc : NULL,
1393                                                           elem, elems, params);
1394                         break;
1395                 case WLAN_EID_S1G_CAPABILITIES:
1396                         if (elen >= sizeof(*elems->s1g_capab))
1397                                 elems->s1g_capab = (void *)pos;
1398                         else
1399                                 elem_parse_failed = true;
1400                         break;
1401                 case WLAN_EID_S1G_OPERATION:
1402                         if (elen == sizeof(*elems->s1g_oper))
1403                                 elems->s1g_oper = (void *)pos;
1404                         else
1405                                 elem_parse_failed = true;
1406                         break;
1407                 case WLAN_EID_S1G_BCN_COMPAT:
1408                         if (elen == sizeof(*elems->s1g_bcn_compat))
1409                                 elems->s1g_bcn_compat = (void *)pos;
1410                         else
1411                                 elem_parse_failed = true;
1412                         break;
1413                 case WLAN_EID_AID_RESPONSE:
1414                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1415                                 elems->aid_resp = (void *)pos;
1416                         else
1417                                 elem_parse_failed = true;
1418                         break;
1419                 default:
1420                         break;
1421                 }
1422
1423                 if (elem_parse_failed)
1424                         elems->parse_error = true;
1425                 else
1426                         __set_bit(id, seen_elems);
1427         }
1428
1429         if (!for_each_element_completed(elem, params->start, params->len))
1430                 elems->parse_error = true;
1431
1432         return crc;
1433 }
1434
1435 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1436                                             struct ieee802_11_elems *elems,
1437                                             struct cfg80211_bss *bss,
1438                                             u8 *nontransmitted_profile)
1439 {
1440         const struct element *elem, *sub;
1441         size_t profile_len = 0;
1442         bool found = false;
1443
1444         if (!bss || !bss->transmitted_bss)
1445                 return profile_len;
1446
1447         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1448                 if (elem->datalen < 2)
1449                         continue;
1450                 if (elem->data[0] < 1 || elem->data[0] > 8)
1451                         continue;
1452
1453                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1454                         u8 new_bssid[ETH_ALEN];
1455                         const u8 *index;
1456
1457                         if (sub->id != 0 || sub->datalen < 4) {
1458                                 /* not a valid BSS profile */
1459                                 continue;
1460                         }
1461
1462                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1463                             sub->data[1] != 2) {
1464                                 /* The first element of the
1465                                  * Nontransmitted BSSID Profile is not
1466                                  * the Nontransmitted BSSID Capability
1467                                  * element.
1468                                  */
1469                                 continue;
1470                         }
1471
1472                         memset(nontransmitted_profile, 0, len);
1473                         profile_len = cfg80211_merge_profile(start, len,
1474                                                              elem,
1475                                                              sub,
1476                                                              nontransmitted_profile,
1477                                                              len);
1478
1479                         /* found a Nontransmitted BSSID Profile */
1480                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1481                                                  nontransmitted_profile,
1482                                                  profile_len);
1483                         if (!index || index[1] < 1 || index[2] == 0) {
1484                                 /* Invalid MBSSID Index element */
1485                                 continue;
1486                         }
1487
1488                         cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1489                                                elem->data[0],
1490                                                index[2],
1491                                                new_bssid);
1492                         if (ether_addr_equal(new_bssid, bss->bssid)) {
1493                                 found = true;
1494                                 elems->bssid_index_len = index[1];
1495                                 elems->bssid_index = (void *)&index[2];
1496                                 break;
1497                         }
1498                 }
1499         }
1500
1501         return found ? profile_len : 0;
1502 }
1503
1504 static void ieee80211_mle_get_sta_prof(struct ieee802_11_elems *elems,
1505                                        u8 link_id)
1506 {
1507         const struct ieee80211_multi_link_elem *ml = elems->ml_basic;
1508         ssize_t ml_len = elems->ml_basic_len;
1509         const struct element *sub;
1510
1511         if (!ml || !ml_len)
1512                 return;
1513
1514         if (le16_get_bits(ml->control, IEEE80211_ML_CONTROL_TYPE) !=
1515             IEEE80211_ML_CONTROL_TYPE_BASIC)
1516                 return;
1517
1518         for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
1519                 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
1520                 ssize_t sta_prof_len;
1521                 u16 control;
1522
1523                 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
1524                         continue;
1525
1526                 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data,
1527                                                           sub->datalen))
1528                         return;
1529
1530                 control = le16_to_cpu(prof->control);
1531
1532                 if (link_id != u16_get_bits(control,
1533                                             IEEE80211_MLE_STA_CONTROL_LINK_ID))
1534                         continue;
1535
1536                 if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE))
1537                         return;
1538
1539                 /* the sub element can be fragmented */
1540                 sta_prof_len =
1541                         cfg80211_defragment_element(sub,
1542                                                     (u8 *)ml, ml_len,
1543                                                     elems->scratch_pos,
1544                                                     elems->scratch +
1545                                                         elems->scratch_len -
1546                                                         elems->scratch_pos,
1547                                                     IEEE80211_MLE_SUBELEM_FRAGMENT);
1548
1549                 if (sta_prof_len < 0)
1550                         return;
1551
1552                 elems->prof = (void *)elems->scratch_pos;
1553                 elems->sta_prof_len = sta_prof_len;
1554                 elems->scratch_pos += sta_prof_len;
1555
1556                 return;
1557         }
1558 }
1559
1560 static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems,
1561                                      struct ieee80211_elems_parse_params *params)
1562 {
1563         struct ieee80211_mle_per_sta_profile *prof;
1564         struct ieee80211_elems_parse_params sub = {
1565                 .action = params->action,
1566                 .from_ap = params->from_ap,
1567                 .link_id = -1,
1568         };
1569         ssize_t ml_len = elems->ml_basic_len;
1570         const struct element *non_inherit = NULL;
1571         const u8 *end;
1572
1573         if (params->link_id == -1)
1574                 return;
1575
1576         ml_len = cfg80211_defragment_element(elems->ml_basic_elem,
1577                                              elems->ie_start,
1578                                              elems->total_len,
1579                                              elems->scratch_pos,
1580                                              elems->scratch +
1581                                                 elems->scratch_len -
1582                                                 elems->scratch_pos,
1583                                              WLAN_EID_FRAGMENT);
1584
1585         if (ml_len < 0)
1586                 return;
1587
1588         elems->ml_basic = (const void *)elems->scratch_pos;
1589         elems->ml_basic_len = ml_len;
1590
1591         ieee80211_mle_get_sta_prof(elems, params->link_id);
1592         prof = elems->prof;
1593
1594         if (!prof)
1595                 return;
1596
1597         /* check if we have the 4 bytes for the fixed part in assoc response */
1598         if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) {
1599                 elems->prof = NULL;
1600                 elems->sta_prof_len = 0;
1601                 return;
1602         }
1603
1604         /*
1605          * Skip the capability information and the status code that are expected
1606          * as part of the station profile in association response frames. Note
1607          * the -1 is because the 'sta_info_len' is accounted to as part of the
1608          * per-STA profile, but not part of the 'u8 variable[]' portion.
1609          */
1610         sub.start = prof->variable + prof->sta_info_len - 1 + 4;
1611         end = (const u8 *)prof + elems->sta_prof_len;
1612         sub.len = end - sub.start;
1613
1614         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1615                                              sub.start, sub.len);
1616         _ieee802_11_parse_elems_full(&sub, elems, non_inherit);
1617 }
1618
1619 struct ieee802_11_elems *
1620 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1621 {
1622         struct ieee802_11_elems *elems;
1623         const struct element *non_inherit = NULL;
1624         u8 *nontransmitted_profile;
1625         int nontransmitted_profile_len = 0;
1626         size_t scratch_len = 3 * params->len;
1627
1628         elems = kzalloc(struct_size(elems, scratch, scratch_len), GFP_ATOMIC);
1629         if (!elems)
1630                 return NULL;
1631         elems->ie_start = params->start;
1632         elems->total_len = params->len;
1633         elems->scratch_len = scratch_len;
1634         elems->scratch_pos = elems->scratch;
1635
1636         nontransmitted_profile = elems->scratch_pos;
1637         nontransmitted_profile_len =
1638                 ieee802_11_find_bssid_profile(params->start, params->len,
1639                                               elems, params->bss,
1640                                               nontransmitted_profile);
1641         elems->scratch_pos += nontransmitted_profile_len;
1642         elems->scratch_len -= nontransmitted_profile_len;
1643         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1644                                              nontransmitted_profile,
1645                                              nontransmitted_profile_len);
1646
1647         elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1648
1649         /* Override with nontransmitted profile, if found */
1650         if (nontransmitted_profile_len) {
1651                 struct ieee80211_elems_parse_params sub = {
1652                         .start = nontransmitted_profile,
1653                         .len = nontransmitted_profile_len,
1654                         .action = params->action,
1655                         .link_id = params->link_id,
1656                 };
1657
1658                 _ieee802_11_parse_elems_full(&sub, elems, NULL);
1659         }
1660
1661         ieee80211_mle_parse_link(elems, params);
1662
1663         if (elems->tim && !elems->parse_error) {
1664                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1665
1666                 elems->dtim_period = tim_ie->dtim_period;
1667                 elems->dtim_count = tim_ie->dtim_count;
1668         }
1669
1670         /* Override DTIM period and count if needed */
1671         if (elems->bssid_index &&
1672             elems->bssid_index_len >=
1673             offsetofend(struct ieee80211_bssid_index, dtim_period))
1674                 elems->dtim_period = elems->bssid_index->dtim_period;
1675
1676         if (elems->bssid_index &&
1677             elems->bssid_index_len >=
1678             offsetofend(struct ieee80211_bssid_index, dtim_count))
1679                 elems->dtim_count = elems->bssid_index->dtim_count;
1680
1681         return elems;
1682 }
1683 EXPORT_SYMBOL_IF_KUNIT(ieee802_11_parse_elems_full);
1684
1685 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1686                                            struct ieee80211_tx_queue_params
1687                                            *qparam, int ac)
1688 {
1689         struct ieee80211_chanctx_conf *chanctx_conf;
1690         const struct ieee80211_reg_rule *rrule;
1691         const struct ieee80211_wmm_ac *wmm_ac;
1692         u16 center_freq = 0;
1693
1694         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1695             sdata->vif.type != NL80211_IFTYPE_STATION)
1696                 return;
1697
1698         rcu_read_lock();
1699         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1700         if (chanctx_conf)
1701                 center_freq = chanctx_conf->def.chan->center_freq;
1702
1703         if (!center_freq) {
1704                 rcu_read_unlock();
1705                 return;
1706         }
1707
1708         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1709
1710         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1711                 rcu_read_unlock();
1712                 return;
1713         }
1714
1715         if (sdata->vif.type == NL80211_IFTYPE_AP)
1716                 wmm_ac = &rrule->wmm_rule.ap[ac];
1717         else
1718                 wmm_ac = &rrule->wmm_rule.client[ac];
1719         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1720         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1721         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1722         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1723         rcu_read_unlock();
1724 }
1725
1726 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1727                                bool bss_notify, bool enable_qos)
1728 {
1729         struct ieee80211_sub_if_data *sdata = link->sdata;
1730         struct ieee80211_local *local = sdata->local;
1731         struct ieee80211_tx_queue_params qparam;
1732         struct ieee80211_chanctx_conf *chanctx_conf;
1733         int ac;
1734         bool use_11b;
1735         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1736         int aCWmin, aCWmax;
1737
1738         if (!local->ops->conf_tx)
1739                 return;
1740
1741         if (local->hw.queues < IEEE80211_NUM_ACS)
1742                 return;
1743
1744         memset(&qparam, 0, sizeof(qparam));
1745
1746         rcu_read_lock();
1747         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1748         use_11b = (chanctx_conf &&
1749                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1750                  !link->operating_11g_mode;
1751         rcu_read_unlock();
1752
1753         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1754
1755         /* Set defaults according to 802.11-2007 Table 7-37 */
1756         aCWmax = 1023;
1757         if (use_11b)
1758                 aCWmin = 31;
1759         else
1760                 aCWmin = 15;
1761
1762         /* Confiure old 802.11b/g medium access rules. */
1763         qparam.cw_max = aCWmax;
1764         qparam.cw_min = aCWmin;
1765         qparam.txop = 0;
1766         qparam.aifs = 2;
1767
1768         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1769                 /* Update if QoS is enabled. */
1770                 if (enable_qos) {
1771                         switch (ac) {
1772                         case IEEE80211_AC_BK:
1773                                 qparam.cw_max = aCWmax;
1774                                 qparam.cw_min = aCWmin;
1775                                 qparam.txop = 0;
1776                                 if (is_ocb)
1777                                         qparam.aifs = 9;
1778                                 else
1779                                         qparam.aifs = 7;
1780                                 break;
1781                         /* never happens but let's not leave undefined */
1782                         default:
1783                         case IEEE80211_AC_BE:
1784                                 qparam.cw_max = aCWmax;
1785                                 qparam.cw_min = aCWmin;
1786                                 qparam.txop = 0;
1787                                 if (is_ocb)
1788                                         qparam.aifs = 6;
1789                                 else
1790                                         qparam.aifs = 3;
1791                                 break;
1792                         case IEEE80211_AC_VI:
1793                                 qparam.cw_max = aCWmin;
1794                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1795                                 if (is_ocb)
1796                                         qparam.txop = 0;
1797                                 else if (use_11b)
1798                                         qparam.txop = 6016/32;
1799                                 else
1800                                         qparam.txop = 3008/32;
1801
1802                                 if (is_ocb)
1803                                         qparam.aifs = 3;
1804                                 else
1805                                         qparam.aifs = 2;
1806                                 break;
1807                         case IEEE80211_AC_VO:
1808                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1809                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1810                                 if (is_ocb)
1811                                         qparam.txop = 0;
1812                                 else if (use_11b)
1813                                         qparam.txop = 3264/32;
1814                                 else
1815                                         qparam.txop = 1504/32;
1816                                 qparam.aifs = 2;
1817                                 break;
1818                         }
1819                 }
1820                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1821
1822                 qparam.uapsd = false;
1823
1824                 link->tx_conf[ac] = qparam;
1825                 drv_conf_tx(local, link, ac, &qparam);
1826         }
1827
1828         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1829             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1830             sdata->vif.type != NL80211_IFTYPE_NAN) {
1831                 link->conf->qos = enable_qos;
1832                 if (bss_notify)
1833                         ieee80211_link_info_change_notify(sdata, link,
1834                                                           BSS_CHANGED_QOS);
1835         }
1836 }
1837
1838 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1839                          u16 transaction, u16 auth_alg, u16 status,
1840                          const u8 *extra, size_t extra_len, const u8 *da,
1841                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1842                          u32 tx_flags)
1843 {
1844         struct ieee80211_local *local = sdata->local;
1845         struct sk_buff *skb;
1846         struct ieee80211_mgmt *mgmt;
1847         bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
1848         struct {
1849                 u8 id;
1850                 u8 len;
1851                 u8 ext_id;
1852                 struct ieee80211_multi_link_elem ml;
1853                 struct ieee80211_mle_basic_common_info basic;
1854         } __packed mle = {
1855                 .id = WLAN_EID_EXTENSION,
1856                 .len = sizeof(mle) - 2,
1857                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1858                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1859                 .basic.len = sizeof(mle.basic),
1860         };
1861         int err;
1862
1863         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1864
1865         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1866         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1867                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1868                             multi_link * sizeof(mle));
1869         if (!skb)
1870                 return;
1871
1872         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1873
1874         mgmt = skb_put_zero(skb, 24 + 6);
1875         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1876                                           IEEE80211_STYPE_AUTH);
1877         memcpy(mgmt->da, da, ETH_ALEN);
1878         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1879         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1880         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1881         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1882         mgmt->u.auth.status_code = cpu_to_le16(status);
1883         if (extra)
1884                 skb_put_data(skb, extra, extra_len);
1885         if (multi_link)
1886                 skb_put_data(skb, &mle, sizeof(mle));
1887
1888         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1889                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1890                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1891                 if (WARN_ON(err)) {
1892                         kfree_skb(skb);
1893                         return;
1894                 }
1895         }
1896
1897         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1898                                         tx_flags;
1899         ieee80211_tx_skb(sdata, skb);
1900 }
1901
1902 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1903                                     const u8 *da, const u8 *bssid,
1904                                     u16 stype, u16 reason,
1905                                     bool send_frame, u8 *frame_buf)
1906 {
1907         struct ieee80211_local *local = sdata->local;
1908         struct sk_buff *skb;
1909         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1910
1911         /* build frame */
1912         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1913         mgmt->duration = 0; /* initialize only */
1914         mgmt->seq_ctrl = 0; /* initialize only */
1915         memcpy(mgmt->da, da, ETH_ALEN);
1916         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1917         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1918         /* u.deauth.reason_code == u.disassoc.reason_code */
1919         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1920
1921         if (send_frame) {
1922                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1923                                     IEEE80211_DEAUTH_FRAME_LEN);
1924                 if (!skb)
1925                         return;
1926
1927                 skb_reserve(skb, local->hw.extra_tx_headroom);
1928
1929                 /* copy in frame */
1930                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1931
1932                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1933                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1934                         IEEE80211_SKB_CB(skb)->flags |=
1935                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1936
1937                 ieee80211_tx_skb(sdata, skb);
1938         }
1939 }
1940
1941 u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1942 {
1943         if ((end - pos) < 5)
1944                 return pos;
1945
1946         *pos++ = WLAN_EID_EXTENSION;
1947         *pos++ = 1 + sizeof(cap);
1948         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1949         memcpy(pos, &cap, sizeof(cap));
1950
1951         return pos + 2;
1952 }
1953
1954 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1955                                          u8 *buffer, size_t buffer_len,
1956                                          const u8 *ie, size_t ie_len,
1957                                          enum nl80211_band band,
1958                                          u32 rate_mask,
1959                                          struct cfg80211_chan_def *chandef,
1960                                          size_t *offset, u32 flags)
1961 {
1962         struct ieee80211_local *local = sdata->local;
1963         struct ieee80211_supported_band *sband;
1964         const struct ieee80211_sta_he_cap *he_cap;
1965         const struct ieee80211_sta_eht_cap *eht_cap;
1966         u8 *pos = buffer, *end = buffer + buffer_len;
1967         size_t noffset;
1968         int supp_rates_len, i;
1969         u8 rates[32];
1970         int num_rates;
1971         int ext_rates_len;
1972         u32 rate_flags;
1973         bool have_80mhz = false;
1974
1975         *offset = 0;
1976
1977         sband = local->hw.wiphy->bands[band];
1978         if (WARN_ON_ONCE(!sband))
1979                 return 0;
1980
1981         rate_flags = ieee80211_chandef_rate_flags(chandef);
1982
1983         /* For direct scan add S1G IE and consider its override bits */
1984         if (band == NL80211_BAND_S1GHZ) {
1985                 if (end - pos < 2 + sizeof(struct ieee80211_s1g_cap))
1986                         goto out_err;
1987                 pos = ieee80211_ie_build_s1g_cap(pos, &sband->s1g_cap);
1988                 goto done;
1989         }
1990
1991         num_rates = 0;
1992         for (i = 0; i < sband->n_bitrates; i++) {
1993                 if ((BIT(i) & rate_mask) == 0)
1994                         continue; /* skip rate */
1995                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1996                         continue;
1997
1998                 rates[num_rates++] =
1999                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
2000         }
2001
2002         supp_rates_len = min_t(int, num_rates, 8);
2003
2004         if (end - pos < 2 + supp_rates_len)
2005                 goto out_err;
2006         *pos++ = WLAN_EID_SUPP_RATES;
2007         *pos++ = supp_rates_len;
2008         memcpy(pos, rates, supp_rates_len);
2009         pos += supp_rates_len;
2010
2011         /* insert "request information" if in custom IEs */
2012         if (ie && ie_len) {
2013                 static const u8 before_extrates[] = {
2014                         WLAN_EID_SSID,
2015                         WLAN_EID_SUPP_RATES,
2016                         WLAN_EID_REQUEST,
2017                 };
2018                 noffset = ieee80211_ie_split(ie, ie_len,
2019                                              before_extrates,
2020                                              ARRAY_SIZE(before_extrates),
2021                                              *offset);
2022                 if (end - pos < noffset - *offset)
2023                         goto out_err;
2024                 memcpy(pos, ie + *offset, noffset - *offset);
2025                 pos += noffset - *offset;
2026                 *offset = noffset;
2027         }
2028
2029         ext_rates_len = num_rates - supp_rates_len;
2030         if (ext_rates_len > 0) {
2031                 if (end - pos < 2 + ext_rates_len)
2032                         goto out_err;
2033                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2034                 *pos++ = ext_rates_len;
2035                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
2036                 pos += ext_rates_len;
2037         }
2038
2039         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
2040                 if (end - pos < 3)
2041                         goto out_err;
2042                 *pos++ = WLAN_EID_DS_PARAMS;
2043                 *pos++ = 1;
2044                 *pos++ = ieee80211_frequency_to_channel(
2045                                 chandef->chan->center_freq);
2046         }
2047
2048         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
2049                 goto done;
2050
2051         /* insert custom IEs that go before HT */
2052         if (ie && ie_len) {
2053                 static const u8 before_ht[] = {
2054                         /*
2055                          * no need to list the ones split off already
2056                          * (or generated here)
2057                          */
2058                         WLAN_EID_DS_PARAMS,
2059                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
2060                 };
2061                 noffset = ieee80211_ie_split(ie, ie_len,
2062                                              before_ht, ARRAY_SIZE(before_ht),
2063                                              *offset);
2064                 if (end - pos < noffset - *offset)
2065                         goto out_err;
2066                 memcpy(pos, ie + *offset, noffset - *offset);
2067                 pos += noffset - *offset;
2068                 *offset = noffset;
2069         }
2070
2071         if (sband->ht_cap.ht_supported) {
2072                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
2073                         goto out_err;
2074                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
2075                                                 sband->ht_cap.cap);
2076         }
2077
2078         /* insert custom IEs that go before VHT */
2079         if (ie && ie_len) {
2080                 static const u8 before_vht[] = {
2081                         /*
2082                          * no need to list the ones split off already
2083                          * (or generated here)
2084                          */
2085                         WLAN_EID_BSS_COEX_2040,
2086                         WLAN_EID_EXT_CAPABILITY,
2087                         WLAN_EID_SSID_LIST,
2088                         WLAN_EID_CHANNEL_USAGE,
2089                         WLAN_EID_INTERWORKING,
2090                         WLAN_EID_MESH_ID,
2091                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
2092                 };
2093                 noffset = ieee80211_ie_split(ie, ie_len,
2094                                              before_vht, ARRAY_SIZE(before_vht),
2095                                              *offset);
2096                 if (end - pos < noffset - *offset)
2097                         goto out_err;
2098                 memcpy(pos, ie + *offset, noffset - *offset);
2099                 pos += noffset - *offset;
2100                 *offset = noffset;
2101         }
2102
2103         /* Check if any channel in this sband supports at least 80 MHz */
2104         for (i = 0; i < sband->n_channels; i++) {
2105                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
2106                                                 IEEE80211_CHAN_NO_80MHZ))
2107                         continue;
2108
2109                 have_80mhz = true;
2110                 break;
2111         }
2112
2113         if (sband->vht_cap.vht_supported && have_80mhz) {
2114                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
2115                         goto out_err;
2116                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
2117                                                  sband->vht_cap.cap);
2118         }
2119
2120         /* insert custom IEs that go before HE */
2121         if (ie && ie_len) {
2122                 static const u8 before_he[] = {
2123                         /*
2124                          * no need to list the ones split off before VHT
2125                          * or generated here
2126                          */
2127                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
2128                         WLAN_EID_AP_CSN,
2129                         /* TODO: add 11ah/11aj/11ak elements */
2130                 };
2131                 noffset = ieee80211_ie_split(ie, ie_len,
2132                                              before_he, ARRAY_SIZE(before_he),
2133                                              *offset);
2134                 if (end - pos < noffset - *offset)
2135                         goto out_err;
2136                 memcpy(pos, ie + *offset, noffset - *offset);
2137                 pos += noffset - *offset;
2138                 *offset = noffset;
2139         }
2140
2141         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2142         if (he_cap &&
2143             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2144                                          IEEE80211_CHAN_NO_HE)) {
2145                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2146                 if (!pos)
2147                         goto out_err;
2148         }
2149
2150         eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
2151
2152         if (eht_cap &&
2153             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2154                                          IEEE80211_CHAN_NO_HE |
2155                                          IEEE80211_CHAN_NO_EHT)) {
2156                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end,
2157                                                  sdata->vif.type == NL80211_IFTYPE_AP);
2158                 if (!pos)
2159                         goto out_err;
2160         }
2161
2162         if (cfg80211_any_usable_channels(local->hw.wiphy,
2163                                          BIT(NL80211_BAND_6GHZ),
2164                                          IEEE80211_CHAN_NO_HE)) {
2165                 struct ieee80211_supported_band *sband6;
2166
2167                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2168                 he_cap = ieee80211_get_he_iftype_cap_vif(sband6, &sdata->vif);
2169
2170                 if (he_cap) {
2171                         enum nl80211_iftype iftype =
2172                                 ieee80211_vif_type_p2p(&sdata->vif);
2173                         __le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype);
2174
2175                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2176                 }
2177         }
2178
2179         /*
2180          * If adding more here, adjust code in main.c
2181          * that calculates local->scan_ies_len.
2182          */
2183
2184         return pos - buffer;
2185  out_err:
2186         WARN_ONCE(1, "not enough space for preq IEs\n");
2187  done:
2188         return pos - buffer;
2189 }
2190
2191 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2192                              size_t buffer_len,
2193                              struct ieee80211_scan_ies *ie_desc,
2194                              const u8 *ie, size_t ie_len,
2195                              u8 bands_used, u32 *rate_masks,
2196                              struct cfg80211_chan_def *chandef,
2197                              u32 flags)
2198 {
2199         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2200         int i;
2201
2202         memset(ie_desc, 0, sizeof(*ie_desc));
2203
2204         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2205                 if (bands_used & BIT(i)) {
2206                         pos += ieee80211_build_preq_ies_band(sdata,
2207                                                              buffer + pos,
2208                                                              buffer_len - pos,
2209                                                              ie, ie_len, i,
2210                                                              rate_masks[i],
2211                                                              chandef,
2212                                                              &custom_ie_offset,
2213                                                              flags);
2214                         ie_desc->ies[i] = buffer + old_pos;
2215                         ie_desc->len[i] = pos - old_pos;
2216                         old_pos = pos;
2217                 }
2218         }
2219
2220         /* add any remaining custom IEs */
2221         if (ie && ie_len) {
2222                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2223                               "not enough space for preq custom IEs\n"))
2224                         return pos;
2225                 memcpy(buffer + pos, ie + custom_ie_offset,
2226                        ie_len - custom_ie_offset);
2227                 ie_desc->common_ies = buffer + pos;
2228                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2229                 pos += ie_len - custom_ie_offset;
2230         }
2231
2232         return pos;
2233 };
2234
2235 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2236                                           const u8 *src, const u8 *dst,
2237                                           u32 ratemask,
2238                                           struct ieee80211_channel *chan,
2239                                           const u8 *ssid, size_t ssid_len,
2240                                           const u8 *ie, size_t ie_len,
2241                                           u32 flags)
2242 {
2243         struct ieee80211_local *local = sdata->local;
2244         struct cfg80211_chan_def chandef;
2245         struct sk_buff *skb;
2246         struct ieee80211_mgmt *mgmt;
2247         int ies_len;
2248         u32 rate_masks[NUM_NL80211_BANDS] = {};
2249         struct ieee80211_scan_ies dummy_ie_desc;
2250
2251         /*
2252          * Do not send DS Channel parameter for directed probe requests
2253          * in order to maximize the chance that we get a response.  Some
2254          * badly-behaved APs don't respond when this parameter is included.
2255          */
2256         chandef.width = sdata->vif.bss_conf.chandef.width;
2257         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2258                 chandef.chan = NULL;
2259         else
2260                 chandef.chan = chan;
2261
2262         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2263                                      local->scan_ies_len + ie_len);
2264         if (!skb)
2265                 return NULL;
2266
2267         rate_masks[chan->band] = ratemask;
2268         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2269                                            skb_tailroom(skb), &dummy_ie_desc,
2270                                            ie, ie_len, BIT(chan->band),
2271                                            rate_masks, &chandef, flags);
2272         skb_put(skb, ies_len);
2273
2274         if (dst) {
2275                 mgmt = (struct ieee80211_mgmt *) skb->data;
2276                 memcpy(mgmt->da, dst, ETH_ALEN);
2277                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2278         }
2279
2280         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2281
2282         return skb;
2283 }
2284
2285 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2286                             struct ieee802_11_elems *elems,
2287                             enum nl80211_band band, u32 *basic_rates)
2288 {
2289         struct ieee80211_supported_band *sband;
2290         size_t num_rates;
2291         u32 supp_rates, rate_flags;
2292         int i, j;
2293
2294         sband = sdata->local->hw.wiphy->bands[band];
2295         if (WARN_ON(!sband))
2296                 return 1;
2297
2298         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2299
2300         num_rates = sband->n_bitrates;
2301         supp_rates = 0;
2302         for (i = 0; i < elems->supp_rates_len +
2303                      elems->ext_supp_rates_len; i++) {
2304                 u8 rate = 0;
2305                 int own_rate;
2306                 bool is_basic;
2307                 if (i < elems->supp_rates_len)
2308                         rate = elems->supp_rates[i];
2309                 else if (elems->ext_supp_rates)
2310                         rate = elems->ext_supp_rates
2311                                 [i - elems->supp_rates_len];
2312                 own_rate = 5 * (rate & 0x7f);
2313                 is_basic = !!(rate & 0x80);
2314
2315                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2316                         continue;
2317
2318                 for (j = 0; j < num_rates; j++) {
2319                         int brate;
2320                         if ((rate_flags & sband->bitrates[j].flags)
2321                             != rate_flags)
2322                                 continue;
2323
2324                         brate = sband->bitrates[j].bitrate;
2325
2326                         if (brate == own_rate) {
2327                                 supp_rates |= BIT(j);
2328                                 if (basic_rates && is_basic)
2329                                         *basic_rates |= BIT(j);
2330                         }
2331                 }
2332         }
2333         return supp_rates;
2334 }
2335
2336 void ieee80211_stop_device(struct ieee80211_local *local)
2337 {
2338         ieee80211_led_radio(local, false);
2339         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2340
2341         wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
2342
2343         flush_workqueue(local->workqueue);
2344         wiphy_work_flush(local->hw.wiphy, NULL);
2345         drv_stop(local);
2346 }
2347
2348 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2349                                            bool aborted)
2350 {
2351         /* It's possible that we don't handle the scan completion in
2352          * time during suspend, so if it's still marked as completed
2353          * here, queue the work and flush it to clean things up.
2354          * Instead of calling the worker function directly here, we
2355          * really queue it to avoid potential races with other flows
2356          * scheduling the same work.
2357          */
2358         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2359                 /* If coming from reconfiguration failure, abort the scan so
2360                  * we don't attempt to continue a partial HW scan - which is
2361                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2362                  * completed scan, and a 5 GHz portion is still pending.
2363                  */
2364                 if (aborted)
2365                         set_bit(SCAN_ABORTED, &local->scanning);
2366                 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
2367                 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
2368         }
2369 }
2370
2371 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2372 {
2373         struct ieee80211_sub_if_data *sdata;
2374         struct ieee80211_chanctx *ctx;
2375
2376         lockdep_assert_wiphy(local->hw.wiphy);
2377
2378         /*
2379          * We get here if during resume the device can't be restarted properly.
2380          * We might also get here if this happens during HW reset, which is a
2381          * slightly different situation and we need to drop all connections in
2382          * the latter case.
2383          *
2384          * Ask cfg80211 to turn off all interfaces, this will result in more
2385          * warnings but at least we'll then get into a clean stopped state.
2386          */
2387
2388         local->resuming = false;
2389         local->suspended = false;
2390         local->in_reconfig = false;
2391         local->reconfig_failure = true;
2392
2393         ieee80211_flush_completed_scan(local, true);
2394
2395         /* scheduled scan clearly can't be running any more, but tell
2396          * cfg80211 and clear local state
2397          */
2398         ieee80211_sched_scan_end(local);
2399
2400         list_for_each_entry(sdata, &local->interfaces, list)
2401                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2402
2403         /* Mark channel contexts as not being in the driver any more to avoid
2404          * removing them from the driver during the shutdown process...
2405          */
2406         list_for_each_entry(ctx, &local->chanctx_list, list)
2407                 ctx->driver_present = false;
2408 }
2409
2410 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2411                                      struct ieee80211_sub_if_data *sdata,
2412                                      struct ieee80211_link_data *link)
2413 {
2414         struct ieee80211_chanctx_conf *conf;
2415         struct ieee80211_chanctx *ctx;
2416
2417         lockdep_assert_wiphy(local->hw.wiphy);
2418
2419         if (!local->use_chanctx)
2420                 return;
2421
2422         conf = rcu_dereference_protected(link->conf->chanctx_conf,
2423                                          lockdep_is_held(&local->hw.wiphy->mtx));
2424         if (conf) {
2425                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2426                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2427         }
2428 }
2429
2430 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2431 {
2432         struct ieee80211_local *local = sdata->local;
2433         struct sta_info *sta;
2434
2435         lockdep_assert_wiphy(local->hw.wiphy);
2436
2437         /* add STAs back */
2438         list_for_each_entry(sta, &local->sta_list, list) {
2439                 enum ieee80211_sta_state state;
2440
2441                 if (!sta->uploaded || sta->sdata != sdata)
2442                         continue;
2443
2444                 for (state = IEEE80211_STA_NOTEXIST;
2445                      state < sta->sta_state; state++)
2446                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2447                                               state + 1));
2448         }
2449 }
2450
2451 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2452 {
2453         struct cfg80211_nan_func *func, **funcs;
2454         int res, id, i = 0;
2455
2456         res = drv_start_nan(sdata->local, sdata,
2457                             &sdata->u.nan.conf);
2458         if (WARN_ON(res))
2459                 return res;
2460
2461         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2462                         sizeof(*funcs),
2463                         GFP_KERNEL);
2464         if (!funcs)
2465                 return -ENOMEM;
2466
2467         /* Add all the functions:
2468          * This is a little bit ugly. We need to call a potentially sleeping
2469          * callback for each NAN function, so we can't hold the spinlock.
2470          */
2471         spin_lock_bh(&sdata->u.nan.func_lock);
2472
2473         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2474                 funcs[i++] = func;
2475
2476         spin_unlock_bh(&sdata->u.nan.func_lock);
2477
2478         for (i = 0; funcs[i]; i++) {
2479                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2480                 if (WARN_ON(res))
2481                         ieee80211_nan_func_terminated(&sdata->vif,
2482                                                       funcs[i]->instance_id,
2483                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2484                                                       GFP_KERNEL);
2485         }
2486
2487         kfree(funcs);
2488
2489         return 0;
2490 }
2491
2492 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
2493                                         struct ieee80211_sub_if_data *sdata,
2494                                         u64 changed)
2495 {
2496         int link_id;
2497
2498         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
2499                 struct ieee80211_link_data *link;
2500
2501                 if (!(sdata->vif.active_links & BIT(link_id)))
2502                         continue;
2503
2504                 link = sdata_dereference(sdata->link[link_id], sdata);
2505                 if (!link)
2506                         continue;
2507
2508                 if (rcu_access_pointer(link->u.ap.beacon))
2509                         drv_start_ap(local, sdata, link->conf);
2510
2511                 if (!link->conf->enable_beacon)
2512                         continue;
2513
2514                 changed |= BSS_CHANGED_BEACON |
2515                            BSS_CHANGED_BEACON_ENABLED;
2516
2517                 ieee80211_link_info_change_notify(sdata, link, changed);
2518         }
2519 }
2520
2521 int ieee80211_reconfig(struct ieee80211_local *local)
2522 {
2523         struct ieee80211_hw *hw = &local->hw;
2524         struct ieee80211_sub_if_data *sdata;
2525         struct ieee80211_chanctx *ctx;
2526         struct sta_info *sta;
2527         int res, i;
2528         bool reconfig_due_to_wowlan = false;
2529         struct ieee80211_sub_if_data *sched_scan_sdata;
2530         struct cfg80211_sched_scan_request *sched_scan_req;
2531         bool sched_scan_stopped = false;
2532         bool suspended = local->suspended;
2533         bool in_reconfig = false;
2534
2535         lockdep_assert_wiphy(local->hw.wiphy);
2536
2537         /* nothing to do if HW shouldn't run */
2538         if (!local->open_count)
2539                 goto wake_up;
2540
2541 #ifdef CONFIG_PM
2542         if (suspended)
2543                 local->resuming = true;
2544
2545         if (local->wowlan) {
2546                 /*
2547                  * In the wowlan case, both mac80211 and the device
2548                  * are functional when the resume op is called, so
2549                  * clear local->suspended so the device could operate
2550                  * normally (e.g. pass rx frames).
2551                  */
2552                 local->suspended = false;
2553                 res = drv_resume(local);
2554                 local->wowlan = false;
2555                 if (res < 0) {
2556                         local->resuming = false;
2557                         return res;
2558                 }
2559                 if (res == 0)
2560                         goto wake_up;
2561                 WARN_ON(res > 1);
2562                 /*
2563                  * res is 1, which means the driver requested
2564                  * to go through a regular reset on wakeup.
2565                  * restore local->suspended in this case.
2566                  */
2567                 reconfig_due_to_wowlan = true;
2568                 local->suspended = true;
2569         }
2570 #endif
2571
2572         /*
2573          * In case of hw_restart during suspend (without wowlan),
2574          * cancel restart work, as we are reconfiguring the device
2575          * anyway.
2576          * Note that restart_work is scheduled on a frozen workqueue,
2577          * so we can't deadlock in this case.
2578          */
2579         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2580                 cancel_work_sync(&local->restart_work);
2581
2582         local->started = false;
2583
2584         /*
2585          * Upon resume hardware can sometimes be goofy due to
2586          * various platform / driver / bus issues, so restarting
2587          * the device may at times not work immediately. Propagate
2588          * the error.
2589          */
2590         res = drv_start(local);
2591         if (res) {
2592                 if (suspended)
2593                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2594                 else
2595                         WARN(1, "Hardware became unavailable during restart.\n");
2596                 ieee80211_handle_reconfig_failure(local);
2597                 return res;
2598         }
2599
2600         /* setup fragmentation threshold */
2601         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2602
2603         /* setup RTS threshold */
2604         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2605
2606         /* reset coverage class */
2607         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2608
2609         ieee80211_led_radio(local, true);
2610         ieee80211_mod_tpt_led_trig(local,
2611                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2612
2613         /* add interfaces */
2614         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2615         if (sdata) {
2616                 /* in HW restart it exists already */
2617                 WARN_ON(local->resuming);
2618                 res = drv_add_interface(local, sdata);
2619                 if (WARN_ON(res)) {
2620                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2621                         synchronize_net();
2622                         kfree(sdata);
2623                 }
2624         }
2625
2626         list_for_each_entry(sdata, &local->interfaces, list) {
2627                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2628                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2629                     ieee80211_sdata_running(sdata)) {
2630                         res = drv_add_interface(local, sdata);
2631                         if (WARN_ON(res))
2632                                 break;
2633                 }
2634         }
2635
2636         /* If adding any of the interfaces failed above, roll back and
2637          * report failure.
2638          */
2639         if (res) {
2640                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2641                                                      list)
2642                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2643                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2644                             ieee80211_sdata_running(sdata))
2645                                 drv_remove_interface(local, sdata);
2646                 ieee80211_handle_reconfig_failure(local);
2647                 return res;
2648         }
2649
2650         /* add channel contexts */
2651         if (local->use_chanctx) {
2652                 list_for_each_entry(ctx, &local->chanctx_list, list)
2653                         if (ctx->replace_state !=
2654                             IEEE80211_CHANCTX_REPLACES_OTHER)
2655                                 WARN_ON(drv_add_chanctx(local, ctx));
2656
2657                 sdata = wiphy_dereference(local->hw.wiphy,
2658                                           local->monitor_sdata);
2659                 if (sdata && ieee80211_sdata_running(sdata))
2660                         ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2661         }
2662
2663         /* reconfigure hardware */
2664         ieee80211_hw_config(local, ~0);
2665
2666         ieee80211_configure_filter(local);
2667
2668         /* Finally also reconfigure all the BSS information */
2669         list_for_each_entry(sdata, &local->interfaces, list) {
2670                 /* common change flags for all interface types - link only */
2671                 u64 changed = BSS_CHANGED_ERP_CTS_PROT |
2672                               BSS_CHANGED_ERP_PREAMBLE |
2673                               BSS_CHANGED_ERP_SLOT |
2674                               BSS_CHANGED_HT |
2675                               BSS_CHANGED_BASIC_RATES |
2676                               BSS_CHANGED_BEACON_INT |
2677                               BSS_CHANGED_BSSID |
2678                               BSS_CHANGED_CQM |
2679                               BSS_CHANGED_QOS |
2680                               BSS_CHANGED_TXPOWER |
2681                               BSS_CHANGED_MCAST_RATE;
2682                 struct ieee80211_link_data *link = NULL;
2683                 unsigned int link_id;
2684                 u32 active_links = 0;
2685
2686                 if (!ieee80211_sdata_running(sdata))
2687                         continue;
2688
2689                 if (ieee80211_vif_is_mld(&sdata->vif)) {
2690                         struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
2691                                 [0] = &sdata->vif.bss_conf,
2692                         };
2693
2694                         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
2695                                 /* start with a single active link */
2696                                 active_links = sdata->vif.active_links;
2697                                 link_id = ffs(active_links) - 1;
2698                                 sdata->vif.active_links = BIT(link_id);
2699                         }
2700
2701                         drv_change_vif_links(local, sdata, 0,
2702                                              sdata->vif.active_links,
2703                                              old);
2704                 }
2705
2706                 for (link_id = 0;
2707                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
2708                      link_id++) {
2709                         if (ieee80211_vif_is_mld(&sdata->vif) &&
2710                             !(sdata->vif.active_links & BIT(link_id)))
2711                                 continue;
2712
2713                         link = sdata_dereference(sdata->link[link_id], sdata);
2714                         if (!link)
2715                                 continue;
2716
2717                         ieee80211_assign_chanctx(local, sdata, link);
2718                 }
2719
2720                 switch (sdata->vif.type) {
2721                 case NL80211_IFTYPE_AP_VLAN:
2722                 case NL80211_IFTYPE_MONITOR:
2723                         break;
2724                 case NL80211_IFTYPE_ADHOC:
2725                         if (sdata->vif.cfg.ibss_joined)
2726                                 WARN_ON(drv_join_ibss(local, sdata));
2727                         fallthrough;
2728                 default:
2729                         ieee80211_reconfig_stations(sdata);
2730                         fallthrough;
2731                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2732                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2733                                 drv_conf_tx(local, &sdata->deflink, i,
2734                                             &sdata->deflink.tx_conf[i]);
2735                         break;
2736                 }
2737
2738                 if (sdata->vif.bss_conf.mu_mimo_owner)
2739                         changed |= BSS_CHANGED_MU_GROUPS;
2740
2741                 if (!ieee80211_vif_is_mld(&sdata->vif))
2742                         changed |= BSS_CHANGED_IDLE;
2743
2744                 switch (sdata->vif.type) {
2745                 case NL80211_IFTYPE_STATION:
2746                         if (!ieee80211_vif_is_mld(&sdata->vif)) {
2747                                 changed |= BSS_CHANGED_ASSOC |
2748                                            BSS_CHANGED_ARP_FILTER |
2749                                            BSS_CHANGED_PS;
2750
2751                                 /* Re-send beacon info report to the driver */
2752                                 if (sdata->deflink.u.mgd.have_beacon)
2753                                         changed |= BSS_CHANGED_BEACON_INFO;
2754
2755                                 if (sdata->vif.bss_conf.max_idle_period ||
2756                                     sdata->vif.bss_conf.protected_keep_alive)
2757                                         changed |= BSS_CHANGED_KEEP_ALIVE;
2758
2759                                 if (sdata->vif.bss_conf.eht_puncturing)
2760                                         changed |= BSS_CHANGED_EHT_PUNCTURING;
2761
2762                                 ieee80211_bss_info_change_notify(sdata,
2763                                                                  changed);
2764                         } else if (!WARN_ON(!link)) {
2765                                 ieee80211_link_info_change_notify(sdata, link,
2766                                                                   changed);
2767                                 changed = BSS_CHANGED_ASSOC |
2768                                           BSS_CHANGED_IDLE |
2769                                           BSS_CHANGED_PS |
2770                                           BSS_CHANGED_ARP_FILTER;
2771                                 ieee80211_vif_cfg_change_notify(sdata, changed);
2772                         }
2773                         break;
2774                 case NL80211_IFTYPE_OCB:
2775                         changed |= BSS_CHANGED_OCB;
2776                         ieee80211_bss_info_change_notify(sdata, changed);
2777                         break;
2778                 case NL80211_IFTYPE_ADHOC:
2779                         changed |= BSS_CHANGED_IBSS;
2780                         fallthrough;
2781                 case NL80211_IFTYPE_AP:
2782                         changed |= BSS_CHANGED_P2P_PS;
2783
2784                         if (ieee80211_vif_is_mld(&sdata->vif))
2785                                 ieee80211_vif_cfg_change_notify(sdata,
2786                                                                 BSS_CHANGED_SSID);
2787                         else
2788                                 changed |= BSS_CHANGED_SSID;
2789
2790                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2791                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2792                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2793                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2794
2795                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2796                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2797
2798                                 if (ieee80211_vif_is_mld(&sdata->vif)) {
2799                                         ieee80211_reconfig_ap_links(local,
2800                                                                     sdata,
2801                                                                     changed);
2802                                         break;
2803                                 }
2804
2805                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2806                                         drv_start_ap(local, sdata,
2807                                                      sdata->deflink.conf);
2808                         }
2809                         fallthrough;
2810                 case NL80211_IFTYPE_MESH_POINT:
2811                         if (sdata->vif.bss_conf.enable_beacon) {
2812                                 changed |= BSS_CHANGED_BEACON |
2813                                            BSS_CHANGED_BEACON_ENABLED;
2814                                 ieee80211_bss_info_change_notify(sdata, changed);
2815                         }
2816                         break;
2817                 case NL80211_IFTYPE_NAN:
2818                         res = ieee80211_reconfig_nan(sdata);
2819                         if (res < 0) {
2820                                 ieee80211_handle_reconfig_failure(local);
2821                                 return res;
2822                         }
2823                         break;
2824                 case NL80211_IFTYPE_AP_VLAN:
2825                 case NL80211_IFTYPE_MONITOR:
2826                 case NL80211_IFTYPE_P2P_DEVICE:
2827                         /* nothing to do */
2828                         break;
2829                 case NL80211_IFTYPE_UNSPECIFIED:
2830                 case NUM_NL80211_IFTYPES:
2831                 case NL80211_IFTYPE_P2P_CLIENT:
2832                 case NL80211_IFTYPE_P2P_GO:
2833                 case NL80211_IFTYPE_WDS:
2834                         WARN_ON(1);
2835                         break;
2836                 }
2837
2838                 if (active_links)
2839                         ieee80211_set_active_links(&sdata->vif, active_links);
2840         }
2841
2842         ieee80211_recalc_ps(local);
2843
2844         /*
2845          * The sta might be in psm against the ap (e.g. because
2846          * this was the state before a hw restart), so we
2847          * explicitly send a null packet in order to make sure
2848          * it'll sync against the ap (and get out of psm).
2849          */
2850         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2851                 list_for_each_entry(sdata, &local->interfaces, list) {
2852                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2853                                 continue;
2854                         if (!sdata->u.mgd.associated)
2855                                 continue;
2856
2857                         ieee80211_send_nullfunc(local, sdata, false);
2858                 }
2859         }
2860
2861         /* APs are now beaconing, add back stations */
2862         list_for_each_entry(sdata, &local->interfaces, list) {
2863                 if (!ieee80211_sdata_running(sdata))
2864                         continue;
2865
2866                 switch (sdata->vif.type) {
2867                 case NL80211_IFTYPE_AP_VLAN:
2868                 case NL80211_IFTYPE_AP:
2869                         ieee80211_reconfig_stations(sdata);
2870                         break;
2871                 default:
2872                         break;
2873                 }
2874         }
2875
2876         /* add back keys */
2877         list_for_each_entry(sdata, &local->interfaces, list)
2878                 ieee80211_reenable_keys(sdata);
2879
2880         /* Reconfigure sched scan if it was interrupted by FW restart */
2881         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2882                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2883         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2884                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2885         if (sched_scan_sdata && sched_scan_req)
2886                 /*
2887                  * Sched scan stopped, but we don't want to report it. Instead,
2888                  * we're trying to reschedule. However, if more than one scan
2889                  * plan was set, we cannot reschedule since we don't know which
2890                  * scan plan was currently running (and some scan plans may have
2891                  * already finished).
2892                  */
2893                 if (sched_scan_req->n_scan_plans > 1 ||
2894                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2895                                                          sched_scan_req)) {
2896                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2897                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2898                         sched_scan_stopped = true;
2899                 }
2900
2901         if (sched_scan_stopped)
2902                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2903
2904  wake_up:
2905
2906         if (local->monitors == local->open_count && local->monitors > 0)
2907                 ieee80211_add_virtual_monitor(local);
2908
2909         /*
2910          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2911          * sessions can be established after a resume.
2912          *
2913          * Also tear down aggregation sessions since reconfiguring
2914          * them in a hardware restart scenario is not easily done
2915          * right now, and the hardware will have lost information
2916          * about the sessions, but we and the AP still think they
2917          * are active. This is really a workaround though.
2918          */
2919         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2920                 list_for_each_entry(sta, &local->sta_list, list) {
2921                         if (!local->resuming)
2922                                 ieee80211_sta_tear_down_BA_sessions(
2923                                                 sta, AGG_STOP_LOCAL_REQUEST);
2924                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2925                 }
2926         }
2927
2928         /*
2929          * If this is for hw restart things are still running.
2930          * We may want to change that later, however.
2931          */
2932         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2933                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2934
2935         if (local->in_reconfig) {
2936                 in_reconfig = local->in_reconfig;
2937                 local->in_reconfig = false;
2938                 barrier();
2939
2940                 /* Restart deferred ROCs */
2941                 ieee80211_start_next_roc(local);
2942
2943                 /* Requeue all works */
2944                 list_for_each_entry(sdata, &local->interfaces, list)
2945                         wiphy_work_queue(local->hw.wiphy, &sdata->work);
2946         }
2947
2948         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2949                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2950                                         false);
2951
2952         if (in_reconfig) {
2953                 list_for_each_entry(sdata, &local->interfaces, list) {
2954                         if (!ieee80211_sdata_running(sdata))
2955                                 continue;
2956                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2957                                 ieee80211_sta_restart(sdata);
2958                 }
2959         }
2960
2961         if (!suspended)
2962                 return 0;
2963
2964 #ifdef CONFIG_PM
2965         /* first set suspended false, then resuming */
2966         local->suspended = false;
2967         mb();
2968         local->resuming = false;
2969
2970         ieee80211_flush_completed_scan(local, false);
2971
2972         if (local->open_count && !reconfig_due_to_wowlan)
2973                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2974
2975         list_for_each_entry(sdata, &local->interfaces, list) {
2976                 if (!ieee80211_sdata_running(sdata))
2977                         continue;
2978                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2979                         ieee80211_sta_restart(sdata);
2980         }
2981
2982         mod_timer(&local->sta_cleanup, jiffies + 1);
2983 #else
2984         WARN_ON(1);
2985 #endif
2986
2987         return 0;
2988 }
2989
2990 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2991 {
2992         struct ieee80211_sub_if_data *sdata;
2993         struct ieee80211_local *local;
2994         struct ieee80211_key *key;
2995
2996         if (WARN_ON(!vif))
2997                 return;
2998
2999         sdata = vif_to_sdata(vif);
3000         local = sdata->local;
3001
3002         lockdep_assert_wiphy(local->hw.wiphy);
3003
3004         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
3005                     !local->resuming))
3006                 return;
3007
3008         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
3009                     !local->in_reconfig))
3010                 return;
3011
3012         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
3013                 return;
3014
3015         sdata->flags |= flag;
3016
3017         list_for_each_entry(key, &sdata->key_list, list)
3018                 key->flags |= KEY_FLAG_TAINTED;
3019 }
3020
3021 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
3022 {
3023         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
3024 }
3025 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
3026
3027 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
3028 {
3029         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
3030 }
3031 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
3032
3033 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
3034                            struct ieee80211_link_data *link)
3035 {
3036         struct ieee80211_local *local = sdata->local;
3037         struct ieee80211_chanctx_conf *chanctx_conf;
3038         struct ieee80211_chanctx *chanctx;
3039
3040         lockdep_assert_wiphy(local->hw.wiphy);
3041
3042         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
3043                                                  lockdep_is_held(&local->hw.wiphy->mtx));
3044
3045         /*
3046          * This function can be called from a work, thus it may be possible
3047          * that the chanctx_conf is removed (due to a disconnection, for
3048          * example).
3049          * So nothing should be done in such case.
3050          */
3051         if (!chanctx_conf)
3052                 return;
3053
3054         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
3055         ieee80211_recalc_smps_chanctx(local, chanctx);
3056 }
3057
3058 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
3059                                   int link_id)
3060 {
3061         struct ieee80211_local *local = sdata->local;
3062         struct ieee80211_chanctx_conf *chanctx_conf;
3063         struct ieee80211_chanctx *chanctx;
3064         int i;
3065
3066         lockdep_assert_wiphy(local->hw.wiphy);
3067
3068         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
3069                 struct ieee80211_bss_conf *bss_conf;
3070
3071                 if (link_id >= 0 && link_id != i)
3072                         continue;
3073
3074                 rcu_read_lock();
3075                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
3076                 if (!bss_conf) {
3077                         rcu_read_unlock();
3078                         continue;
3079                 }
3080
3081                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
3082                                                          lockdep_is_held(&local->hw.wiphy->mtx));
3083                 /*
3084                  * Since we hold the wiphy mutex (checked above)
3085                  * we can take the chanctx_conf pointer out of the
3086                  * RCU critical section, it cannot go away without
3087                  * the mutex. Just the way we reached it could - in
3088                  * theory - go away, but we don't really care and
3089                  * it really shouldn't happen anyway.
3090                  */
3091                 rcu_read_unlock();
3092
3093                 if (!chanctx_conf)
3094                         return;
3095
3096                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
3097                                        conf);
3098                 ieee80211_recalc_chanctx_min_def(local, chanctx, NULL);
3099         }
3100 }
3101
3102 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
3103 {
3104         size_t pos = offset;
3105
3106         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
3107                 pos += 2 + ies[pos + 1];
3108
3109         return pos;
3110 }
3111
3112 u8 *ieee80211_ie_build_s1g_cap(u8 *pos, struct ieee80211_sta_s1g_cap *s1g_cap)
3113 {
3114         *pos++ = WLAN_EID_S1G_CAPABILITIES;
3115         *pos++ = sizeof(struct ieee80211_s1g_cap);
3116         memset(pos, 0, sizeof(struct ieee80211_s1g_cap));
3117
3118         memcpy(pos, &s1g_cap->cap, sizeof(s1g_cap->cap));
3119         pos += sizeof(s1g_cap->cap);
3120
3121         memcpy(pos, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
3122         pos += sizeof(s1g_cap->nss_mcs);
3123
3124         return pos;
3125 }
3126
3127 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3128                               u16 cap)
3129 {
3130         __le16 tmp;
3131
3132         *pos++ = WLAN_EID_HT_CAPABILITY;
3133         *pos++ = sizeof(struct ieee80211_ht_cap);
3134         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
3135
3136         /* capability flags */
3137         tmp = cpu_to_le16(cap);
3138         memcpy(pos, &tmp, sizeof(u16));
3139         pos += sizeof(u16);
3140
3141         /* AMPDU parameters */
3142         *pos++ = ht_cap->ampdu_factor |
3143                  (ht_cap->ampdu_density <<
3144                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
3145
3146         /* MCS set */
3147         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
3148         pos += sizeof(ht_cap->mcs);
3149
3150         /* extended capabilities */
3151         pos += sizeof(__le16);
3152
3153         /* BF capabilities */
3154         pos += sizeof(__le32);
3155
3156         /* antenna selection */
3157         pos += sizeof(u8);
3158
3159         return pos;
3160 }
3161
3162 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3163                                u32 cap)
3164 {
3165         __le32 tmp;
3166
3167         *pos++ = WLAN_EID_VHT_CAPABILITY;
3168         *pos++ = sizeof(struct ieee80211_vht_cap);
3169         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
3170
3171         /* capability flags */
3172         tmp = cpu_to_le32(cap);
3173         memcpy(pos, &tmp, sizeof(u32));
3174         pos += sizeof(u32);
3175
3176         /* VHT MCS set */
3177         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
3178         pos += sizeof(vht_cap->vht_mcs);
3179
3180         return pos;
3181 }
3182
3183 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
3184 {
3185         const struct ieee80211_sta_he_cap *he_cap;
3186         struct ieee80211_supported_band *sband;
3187         u8 n;
3188
3189         sband = ieee80211_get_sband(sdata);
3190         if (!sband)
3191                 return 0;
3192
3193         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3194         if (!he_cap)
3195                 return 0;
3196
3197         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
3198         return 2 + 1 +
3199                sizeof(he_cap->he_cap_elem) + n +
3200                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3201                                      he_cap->he_cap_elem.phy_cap_info);
3202 }
3203
3204 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
3205                               const struct ieee80211_sta_he_cap *he_cap,
3206                               u8 *end)
3207 {
3208         struct ieee80211_he_cap_elem elem;
3209         u8 n;
3210         u8 ie_len;
3211         u8 *orig_pos = pos;
3212
3213         /* Make sure we have place for the IE */
3214         /*
3215          * TODO: the 1 added is because this temporarily is under the EXTENSION
3216          * IE. Get rid of it when it moves.
3217          */
3218         if (!he_cap)
3219                 return orig_pos;
3220
3221         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
3222         elem = he_cap->he_cap_elem;
3223
3224         if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3225                 elem.phy_cap_info[0] &=
3226                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3227                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3228
3229         if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3230                 elem.phy_cap_info[0] &=
3231                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3232
3233         if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3234                 elem.phy_cap_info[0] &=
3235                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3236
3237         n = ieee80211_he_mcs_nss_size(&elem);
3238         ie_len = 2 + 1 +
3239                  sizeof(he_cap->he_cap_elem) + n +
3240                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3241                                        he_cap->he_cap_elem.phy_cap_info);
3242
3243         if ((end - pos) < ie_len)
3244                 return orig_pos;
3245
3246         *pos++ = WLAN_EID_EXTENSION;
3247         pos++; /* We'll set the size later below */
3248         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3249
3250         /* Fixed data */
3251         memcpy(pos, &elem, sizeof(elem));
3252         pos += sizeof(elem);
3253
3254         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3255         pos += n;
3256
3257         /* Check if PPE Threshold should be present */
3258         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3259              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3260                 goto end;
3261
3262         /*
3263          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3264          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3265          */
3266         n = hweight8(he_cap->ppe_thres[0] &
3267                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3268         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3269                    IEEE80211_PPE_THRES_NSS_POS));
3270
3271         /*
3272          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3273          * total size.
3274          */
3275         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3276         n = DIV_ROUND_UP(n, 8);
3277
3278         /* Copy PPE Thresholds */
3279         memcpy(pos, &he_cap->ppe_thres, n);
3280         pos += n;
3281
3282 end:
3283         orig_pos[1] = (pos - orig_pos) - 2;
3284         return pos;
3285 }
3286
3287 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3288                                     enum ieee80211_smps_mode smps_mode,
3289                                     struct sk_buff *skb)
3290 {
3291         struct ieee80211_supported_band *sband;
3292         const struct ieee80211_sband_iftype_data *iftd;
3293         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3294         u8 *pos;
3295         u16 cap;
3296
3297         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3298                                           BIT(NL80211_BAND_6GHZ),
3299                                           IEEE80211_CHAN_NO_HE))
3300                 return;
3301
3302         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3303
3304         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3305         if (!iftd)
3306                 return;
3307
3308         /* Check for device HE 6 GHz capability before adding element */
3309         if (!iftd->he_6ghz_capa.capa)
3310                 return;
3311
3312         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3313         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3314
3315         switch (smps_mode) {
3316         case IEEE80211_SMPS_AUTOMATIC:
3317         case IEEE80211_SMPS_NUM_MODES:
3318                 WARN_ON(1);
3319                 fallthrough;
3320         case IEEE80211_SMPS_OFF:
3321                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3322                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3323                 break;
3324         case IEEE80211_SMPS_STATIC:
3325                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3326                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3327                 break;
3328         case IEEE80211_SMPS_DYNAMIC:
3329                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3330                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3331                 break;
3332         }
3333
3334         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3335         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3336                                     pos + 2 + 1 + sizeof(cap));
3337 }
3338
3339 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3340                                const struct cfg80211_chan_def *chandef,
3341                                u16 prot_mode, bool rifs_mode)
3342 {
3343         struct ieee80211_ht_operation *ht_oper;
3344         /* Build HT Information */
3345         *pos++ = WLAN_EID_HT_OPERATION;
3346         *pos++ = sizeof(struct ieee80211_ht_operation);
3347         ht_oper = (struct ieee80211_ht_operation *)pos;
3348         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3349                                         chandef->chan->center_freq);
3350         switch (chandef->width) {
3351         case NL80211_CHAN_WIDTH_160:
3352         case NL80211_CHAN_WIDTH_80P80:
3353         case NL80211_CHAN_WIDTH_80:
3354         case NL80211_CHAN_WIDTH_40:
3355                 if (chandef->center_freq1 > chandef->chan->center_freq)
3356                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3357                 else
3358                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3359                 break;
3360         case NL80211_CHAN_WIDTH_320:
3361                 /* HT information element should not be included on 6GHz */
3362                 WARN_ON(1);
3363                 return pos;
3364         default:
3365                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3366                 break;
3367         }
3368         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3369             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3370             chandef->width != NL80211_CHAN_WIDTH_20)
3371                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3372
3373         if (rifs_mode)
3374                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3375
3376         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3377         ht_oper->stbc_param = 0x0000;
3378
3379         /* It seems that Basic MCS set and Supported MCS set
3380            are identical for the first 10 bytes */
3381         memset(&ht_oper->basic_set, 0, 16);
3382         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3383
3384         return pos + sizeof(struct ieee80211_ht_operation);
3385 }
3386
3387 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3388                                    const struct cfg80211_chan_def *chandef)
3389 {
3390         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3391         *pos++ = 3;                                     /* IE length */
3392         /* New channel width */
3393         switch (chandef->width) {
3394         case NL80211_CHAN_WIDTH_80:
3395                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3396                 break;
3397         case NL80211_CHAN_WIDTH_160:
3398                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3399                 break;
3400         case NL80211_CHAN_WIDTH_80P80:
3401                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3402                 break;
3403         case NL80211_CHAN_WIDTH_320:
3404                 /* The behavior is not defined for 320 MHz channels */
3405                 WARN_ON(1);
3406                 fallthrough;
3407         default:
3408                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3409         }
3410
3411         /* new center frequency segment 0 */
3412         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3413         /* new center frequency segment 1 */
3414         if (chandef->center_freq2)
3415                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3416         else
3417                 *pos++ = 0;
3418 }
3419
3420 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3421                                 const struct cfg80211_chan_def *chandef)
3422 {
3423         struct ieee80211_vht_operation *vht_oper;
3424
3425         *pos++ = WLAN_EID_VHT_OPERATION;
3426         *pos++ = sizeof(struct ieee80211_vht_operation);
3427         vht_oper = (struct ieee80211_vht_operation *)pos;
3428         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3429                                                         chandef->center_freq1);
3430         if (chandef->center_freq2)
3431                 vht_oper->center_freq_seg1_idx =
3432                         ieee80211_frequency_to_channel(chandef->center_freq2);
3433         else
3434                 vht_oper->center_freq_seg1_idx = 0x00;
3435
3436         switch (chandef->width) {
3437         case NL80211_CHAN_WIDTH_160:
3438                 /*
3439                  * Convert 160 MHz channel width to new style as interop
3440                  * workaround.
3441                  */
3442                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3443                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3444                 if (chandef->chan->center_freq < chandef->center_freq1)
3445                         vht_oper->center_freq_seg0_idx -= 8;
3446                 else
3447                         vht_oper->center_freq_seg0_idx += 8;
3448                 break;
3449         case NL80211_CHAN_WIDTH_80P80:
3450                 /*
3451                  * Convert 80+80 MHz channel width to new style as interop
3452                  * workaround.
3453                  */
3454                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3455                 break;
3456         case NL80211_CHAN_WIDTH_80:
3457                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3458                 break;
3459         case NL80211_CHAN_WIDTH_320:
3460                 /* VHT information element should not be included on 6GHz */
3461                 WARN_ON(1);
3462                 return pos;
3463         default:
3464                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3465                 break;
3466         }
3467
3468         /* don't require special VHT peer rates */
3469         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3470
3471         return pos + sizeof(struct ieee80211_vht_operation);
3472 }
3473
3474 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3475 {
3476         struct ieee80211_he_operation *he_oper;
3477         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3478         u32 he_oper_params;
3479         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3480
3481         if (chandef->chan->band == NL80211_BAND_6GHZ)
3482                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3483
3484         *pos++ = WLAN_EID_EXTENSION;
3485         *pos++ = ie_len;
3486         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3487
3488         he_oper_params = 0;
3489         he_oper_params |= u32_encode_bits(1023, /* disabled */
3490                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3491         he_oper_params |= u32_encode_bits(1,
3492                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3493         he_oper_params |= u32_encode_bits(1,
3494                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3495         if (chandef->chan->band == NL80211_BAND_6GHZ)
3496                 he_oper_params |= u32_encode_bits(1,
3497                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3498
3499         he_oper = (struct ieee80211_he_operation *)pos;
3500         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3501
3502         /* don't require special HE peer rates */
3503         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3504         pos += sizeof(struct ieee80211_he_operation);
3505
3506         if (chandef->chan->band != NL80211_BAND_6GHZ)
3507                 goto out;
3508
3509         /* TODO add VHT operational */
3510         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3511         he_6ghz_op->minrate = 6; /* 6 Mbps */
3512         he_6ghz_op->primary =
3513                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3514         he_6ghz_op->ccfs0 =
3515                 ieee80211_frequency_to_channel(chandef->center_freq1);
3516         if (chandef->center_freq2)
3517                 he_6ghz_op->ccfs1 =
3518                         ieee80211_frequency_to_channel(chandef->center_freq2);
3519         else
3520                 he_6ghz_op->ccfs1 = 0;
3521
3522         switch (chandef->width) {
3523         case NL80211_CHAN_WIDTH_320:
3524                 /*
3525                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3526                  * channels.
3527                  */
3528                 WARN_ON(1);
3529                 break;
3530         case NL80211_CHAN_WIDTH_160:
3531                 /* Convert 160 MHz channel width to new style as interop
3532                  * workaround.
3533                  */
3534                 he_6ghz_op->control =
3535                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3536                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3537                 if (chandef->chan->center_freq < chandef->center_freq1)
3538                         he_6ghz_op->ccfs0 -= 8;
3539                 else
3540                         he_6ghz_op->ccfs0 += 8;
3541                 fallthrough;
3542         case NL80211_CHAN_WIDTH_80P80:
3543                 he_6ghz_op->control =
3544                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3545                 break;
3546         case NL80211_CHAN_WIDTH_80:
3547                 he_6ghz_op->control =
3548                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3549                 break;
3550         case NL80211_CHAN_WIDTH_40:
3551                 he_6ghz_op->control =
3552                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3553                 break;
3554         default:
3555                 he_6ghz_op->control =
3556                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3557                 break;
3558         }
3559
3560         pos += sizeof(struct ieee80211_he_6ghz_oper);
3561
3562 out:
3563         return pos;
3564 }
3565
3566 u8 *ieee80211_ie_build_eht_oper(u8 *pos, struct cfg80211_chan_def *chandef,
3567                                 const struct ieee80211_sta_eht_cap *eht_cap)
3568
3569 {
3570         const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
3571                                         &eht_cap->eht_mcs_nss_supp.only_20mhz;
3572         struct ieee80211_eht_operation *eht_oper;
3573         struct ieee80211_eht_operation_info *eht_oper_info;
3574         u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
3575         u8 eht_oper_info_len =
3576                 offsetof(struct ieee80211_eht_operation_info, optional);
3577         u8 chan_width = 0;
3578
3579         *pos++ = WLAN_EID_EXTENSION;
3580         *pos++ = 1 + eht_oper_len + eht_oper_info_len;
3581         *pos++ = WLAN_EID_EXT_EHT_OPERATION;
3582
3583         eht_oper = (struct ieee80211_eht_operation *)pos;
3584
3585         memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
3586         eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
3587         pos += eht_oper_len;
3588
3589         eht_oper_info =
3590                 (struct ieee80211_eht_operation_info *)eht_oper->optional;
3591
3592         eht_oper_info->ccfs0 =
3593                 ieee80211_frequency_to_channel(chandef->center_freq1);
3594         if (chandef->center_freq2)
3595                 eht_oper_info->ccfs1 =
3596                         ieee80211_frequency_to_channel(chandef->center_freq2);
3597         else
3598                 eht_oper_info->ccfs1 = 0;
3599
3600         switch (chandef->width) {
3601         case NL80211_CHAN_WIDTH_320:
3602                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
3603                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
3604                 if (chandef->chan->center_freq < chandef->center_freq1)
3605                         eht_oper_info->ccfs0 -= 16;
3606                 else
3607                         eht_oper_info->ccfs0 += 16;
3608                 break;
3609         case NL80211_CHAN_WIDTH_160:
3610                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
3611                 if (chandef->chan->center_freq < chandef->center_freq1)
3612                         eht_oper_info->ccfs0 -= 8;
3613                 else
3614                         eht_oper_info->ccfs0 += 8;
3615                 fallthrough;
3616         case NL80211_CHAN_WIDTH_80P80:
3617                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
3618                 break;
3619         case NL80211_CHAN_WIDTH_80:
3620                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
3621                 break;
3622         case NL80211_CHAN_WIDTH_40:
3623                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
3624                 break;
3625         default:
3626                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
3627                 break;
3628         }
3629         eht_oper_info->control = chan_width;
3630         pos += eht_oper_info_len;
3631
3632         /* TODO: eht_oper_info->optional */
3633
3634         return pos;
3635 }
3636
3637 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3638                                struct cfg80211_chan_def *chandef)
3639 {
3640         enum nl80211_channel_type channel_type;
3641
3642         if (!ht_oper)
3643                 return false;
3644
3645         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3646         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3647                 channel_type = NL80211_CHAN_HT20;
3648                 break;
3649         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3650                 channel_type = NL80211_CHAN_HT40PLUS;
3651                 break;
3652         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3653                 channel_type = NL80211_CHAN_HT40MINUS;
3654                 break;
3655         default:
3656                 return false;
3657         }
3658
3659         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3660         return true;
3661 }
3662
3663 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3664                                 const struct ieee80211_vht_operation *oper,
3665                                 const struct ieee80211_ht_operation *htop,
3666                                 struct cfg80211_chan_def *chandef)
3667 {
3668         struct cfg80211_chan_def new = *chandef;
3669         int cf0, cf1;
3670         int ccfs0, ccfs1, ccfs2;
3671         int ccf0, ccf1;
3672         u32 vht_cap;
3673         bool support_80_80 = false;
3674         bool support_160 = false;
3675         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3676                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3677         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3678                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3679
3680         if (!oper || !htop)
3681                 return false;
3682
3683         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3684         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3685                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3686         support_80_80 = ((vht_cap &
3687                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3688                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3689                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3690                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3691                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3692         ccfs0 = oper->center_freq_seg0_idx;
3693         ccfs1 = oper->center_freq_seg1_idx;
3694         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3695                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3696                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3697
3698         ccf0 = ccfs0;
3699
3700         /* if not supported, parse as though we didn't understand it */
3701         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3702                 ext_nss_bw_supp = 0;
3703
3704         /*
3705          * Cf. IEEE 802.11 Table 9-250
3706          *
3707          * We really just consider that because it's inefficient to connect
3708          * at a higher bandwidth than we'll actually be able to use.
3709          */
3710         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3711         default:
3712         case 0x00:
3713                 ccf1 = 0;
3714                 support_160 = false;
3715                 support_80_80 = false;
3716                 break;
3717         case 0x01:
3718                 support_80_80 = false;
3719                 fallthrough;
3720         case 0x02:
3721         case 0x03:
3722                 ccf1 = ccfs2;
3723                 break;
3724         case 0x10:
3725                 ccf1 = ccfs1;
3726                 break;
3727         case 0x11:
3728         case 0x12:
3729                 if (!ccfs1)
3730                         ccf1 = ccfs2;
3731                 else
3732                         ccf1 = ccfs1;
3733                 break;
3734         case 0x13:
3735         case 0x20:
3736         case 0x23:
3737                 ccf1 = ccfs1;
3738                 break;
3739         }
3740
3741         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3742         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3743
3744         switch (oper->chan_width) {
3745         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3746                 /* just use HT information directly */
3747                 break;
3748         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3749                 new.width = NL80211_CHAN_WIDTH_80;
3750                 new.center_freq1 = cf0;
3751                 /* If needed, adjust based on the newer interop workaround. */
3752                 if (ccf1) {
3753                         unsigned int diff;
3754
3755                         diff = abs(ccf1 - ccf0);
3756                         if ((diff == 8) && support_160) {
3757                                 new.width = NL80211_CHAN_WIDTH_160;
3758                                 new.center_freq1 = cf1;
3759                         } else if ((diff > 8) && support_80_80) {
3760                                 new.width = NL80211_CHAN_WIDTH_80P80;
3761                                 new.center_freq2 = cf1;
3762                         }
3763                 }
3764                 break;
3765         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3766                 /* deprecated encoding */
3767                 new.width = NL80211_CHAN_WIDTH_160;
3768                 new.center_freq1 = cf0;
3769                 break;
3770         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3771                 /* deprecated encoding */
3772                 new.width = NL80211_CHAN_WIDTH_80P80;
3773                 new.center_freq1 = cf0;
3774                 new.center_freq2 = cf1;
3775                 break;
3776         default:
3777                 return false;
3778         }
3779
3780         if (!cfg80211_chandef_valid(&new))
3781                 return false;
3782
3783         *chandef = new;
3784         return true;
3785 }
3786
3787 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
3788                                 bool support_160, bool support_320,
3789                                 struct cfg80211_chan_def *chandef)
3790 {
3791         chandef->center_freq1 =
3792                 ieee80211_channel_to_frequency(info->ccfs0,
3793                                                chandef->chan->band);
3794
3795         switch (u8_get_bits(info->control,
3796                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3797         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3798                 chandef->width = NL80211_CHAN_WIDTH_20;
3799                 break;
3800         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3801                 chandef->width = NL80211_CHAN_WIDTH_40;
3802                 break;
3803         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3804                 chandef->width = NL80211_CHAN_WIDTH_80;
3805                 break;
3806         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3807                 if (support_160) {
3808                         chandef->width = NL80211_CHAN_WIDTH_160;
3809                         chandef->center_freq1 =
3810                                 ieee80211_channel_to_frequency(info->ccfs1,
3811                                                                chandef->chan->band);
3812                 } else {
3813                         chandef->width = NL80211_CHAN_WIDTH_80;
3814                 }
3815                 break;
3816         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3817                 if (support_320) {
3818                         chandef->width = NL80211_CHAN_WIDTH_320;
3819                         chandef->center_freq1 =
3820                                 ieee80211_channel_to_frequency(info->ccfs1,
3821                                                                chandef->chan->band);
3822                 } else if (support_160) {
3823                         chandef->width = NL80211_CHAN_WIDTH_160;
3824                 } else {
3825                         chandef->width = NL80211_CHAN_WIDTH_80;
3826
3827                         if (chandef->center_freq1 > chandef->chan->center_freq)
3828                                 chandef->center_freq1 -= 40;
3829                         else
3830                                 chandef->center_freq1 += 40;
3831                 }
3832                 break;
3833         }
3834 }
3835
3836 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3837                                     const struct ieee80211_he_operation *he_oper,
3838                                     const struct ieee80211_eht_operation *eht_oper,
3839                                     struct cfg80211_chan_def *chandef)
3840 {
3841         struct ieee80211_local *local = sdata->local;
3842         struct ieee80211_supported_band *sband;
3843         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3844         const struct ieee80211_sta_he_cap *he_cap;
3845         const struct ieee80211_sta_eht_cap *eht_cap;
3846         struct cfg80211_chan_def he_chandef = *chandef;
3847         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3848         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3849         bool support_80_80, support_160, support_320;
3850         u8 he_phy_cap, eht_phy_cap;
3851         u32 freq;
3852
3853         if (chandef->chan->band != NL80211_BAND_6GHZ)
3854                 return true;
3855
3856         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3857
3858         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3859         if (!he_cap) {
3860                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3861                 return false;
3862         }
3863
3864         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3865         support_160 =
3866                 he_phy_cap &
3867                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3868         support_80_80 =
3869                 he_phy_cap &
3870                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3871
3872         if (!he_oper) {
3873                 sdata_info(sdata,
3874                            "HE is not advertised on (on %d MHz), expect issues\n",
3875                            chandef->chan->center_freq);
3876                 return false;
3877         }
3878
3879         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3880         if (!eht_cap)
3881                 eht_oper = NULL;
3882
3883         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3884
3885         if (!he_6ghz_oper) {
3886                 sdata_info(sdata,
3887                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3888                            chandef->chan->center_freq);
3889                 return false;
3890         }
3891
3892         /*
3893          * The EHT operation IE does not contain the primary channel so the
3894          * primary channel frequency should be taken from the 6 GHz operation
3895          * information.
3896          */
3897         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3898                                               NL80211_BAND_6GHZ);
3899         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3900
3901         switch (u8_get_bits(he_6ghz_oper->control,
3902                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3903         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3904                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3905                 break;
3906         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3907                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3908                 break;
3909         default:
3910                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3911                 break;
3912         }
3913
3914         if (!eht_oper ||
3915             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3916                 switch (u8_get_bits(he_6ghz_oper->control,
3917                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3918                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3919                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3920                         break;
3921                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3922                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3923                         break;
3924                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3925                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3926                         break;
3927                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3928                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3929                         if (!he_6ghz_oper->ccfs1)
3930                                 break;
3931                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3932                                 if (support_160)
3933                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3934                         } else {
3935                                 if (support_80_80)
3936                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3937                         }
3938                         break;
3939                 }
3940
3941                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3942                         he_chandef.center_freq1 =
3943                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3944                                                                NL80211_BAND_6GHZ);
3945                 } else {
3946                         he_chandef.center_freq1 =
3947                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3948                                                                NL80211_BAND_6GHZ);
3949                         if (support_80_80 || support_160)
3950                                 he_chandef.center_freq2 =
3951                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3952                                                                        NL80211_BAND_6GHZ);
3953                 }
3954         } else {
3955                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3956                 support_320 =
3957                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3958
3959                 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
3960                                            support_160, support_320,
3961                                            &he_chandef);
3962         }
3963
3964         if (!cfg80211_chandef_valid(&he_chandef)) {
3965                 sdata_info(sdata,
3966                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3967                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3968                            he_chandef.width,
3969                            he_chandef.center_freq1,
3970                            he_chandef.center_freq2);
3971                 return false;
3972         }
3973
3974         *chandef = he_chandef;
3975
3976         return true;
3977 }
3978
3979 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3980                                 struct cfg80211_chan_def *chandef)
3981 {
3982         u32 oper_freq;
3983
3984         if (!oper)
3985                 return false;
3986
3987         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3988         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3989                 chandef->width = NL80211_CHAN_WIDTH_1;
3990                 break;
3991         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3992                 chandef->width = NL80211_CHAN_WIDTH_2;
3993                 break;
3994         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3995                 chandef->width = NL80211_CHAN_WIDTH_4;
3996                 break;
3997         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3998                 chandef->width = NL80211_CHAN_WIDTH_8;
3999                 break;
4000         case IEEE80211_S1G_CHANWIDTH_16MHZ:
4001                 chandef->width = NL80211_CHAN_WIDTH_16;
4002                 break;
4003         default:
4004                 return false;
4005         }
4006
4007         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
4008                                                   NL80211_BAND_S1GHZ);
4009         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
4010         chandef->freq1_offset = oper_freq % 1000;
4011
4012         return true;
4013 }
4014
4015 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
4016                              const struct ieee80211_supported_band *sband,
4017                              const u8 *srates, int srates_len, u32 *rates)
4018 {
4019         u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
4020         struct ieee80211_rate *br;
4021         int brate, rate, i, j, count = 0;
4022
4023         *rates = 0;
4024
4025         for (i = 0; i < srates_len; i++) {
4026                 rate = srates[i] & 0x7f;
4027
4028                 for (j = 0; j < sband->n_bitrates; j++) {
4029                         br = &sband->bitrates[j];
4030                         if ((rate_flags & br->flags) != rate_flags)
4031                                 continue;
4032
4033                         brate = DIV_ROUND_UP(br->bitrate, 5);
4034                         if (brate == rate) {
4035                                 *rates |= BIT(j);
4036                                 count++;
4037                                 break;
4038                         }
4039                 }
4040         }
4041         return count;
4042 }
4043
4044 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
4045                             struct sk_buff *skb, bool need_basic,
4046                             enum nl80211_band band)
4047 {
4048         struct ieee80211_local *local = sdata->local;
4049         struct ieee80211_supported_band *sband;
4050         int rate;
4051         u8 i, rates, *pos;
4052         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
4053         u32 rate_flags;
4054
4055         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
4056         sband = local->hw.wiphy->bands[band];
4057         rates = 0;
4058         for (i = 0; i < sband->n_bitrates; i++) {
4059                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
4060                         continue;
4061                 rates++;
4062         }
4063         if (rates > 8)
4064                 rates = 8;
4065
4066         if (skb_tailroom(skb) < rates + 2)
4067                 return -ENOMEM;
4068
4069         pos = skb_put(skb, rates + 2);
4070         *pos++ = WLAN_EID_SUPP_RATES;
4071         *pos++ = rates;
4072         for (i = 0; i < rates; i++) {
4073                 u8 basic = 0;
4074                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
4075                         continue;
4076
4077                 if (need_basic && basic_rates & BIT(i))
4078                         basic = 0x80;
4079                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
4080                 *pos++ = basic | (u8) rate;
4081         }
4082
4083         return 0;
4084 }
4085
4086 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
4087                                 struct sk_buff *skb, bool need_basic,
4088                                 enum nl80211_band band)
4089 {
4090         struct ieee80211_local *local = sdata->local;
4091         struct ieee80211_supported_band *sband;
4092         int rate;
4093         u8 i, exrates, *pos;
4094         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
4095         u32 rate_flags;
4096
4097         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
4098
4099         sband = local->hw.wiphy->bands[band];
4100         exrates = 0;
4101         for (i = 0; i < sband->n_bitrates; i++) {
4102                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
4103                         continue;
4104                 exrates++;
4105         }
4106
4107         if (exrates > 8)
4108                 exrates -= 8;
4109         else
4110                 exrates = 0;
4111
4112         if (skb_tailroom(skb) < exrates + 2)
4113                 return -ENOMEM;
4114
4115         if (exrates) {
4116                 pos = skb_put(skb, exrates + 2);
4117                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
4118                 *pos++ = exrates;
4119                 for (i = 8; i < sband->n_bitrates; i++) {
4120                         u8 basic = 0;
4121                         if ((rate_flags & sband->bitrates[i].flags)
4122                             != rate_flags)
4123                                 continue;
4124                         if (need_basic && basic_rates & BIT(i))
4125                                 basic = 0x80;
4126                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
4127                         *pos++ = basic | (u8) rate;
4128                 }
4129         }
4130         return 0;
4131 }
4132
4133 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
4134 {
4135         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4136
4137         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
4138                 return 0;
4139
4140         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
4141 }
4142 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
4143
4144 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
4145 {
4146         if (!mcs)
4147                 return 1;
4148
4149         /* TODO: consider rx_highest */
4150
4151         if (mcs->rx_mask[3])
4152                 return 4;
4153         if (mcs->rx_mask[2])
4154                 return 3;
4155         if (mcs->rx_mask[1])
4156                 return 2;
4157         return 1;
4158 }
4159
4160 /**
4161  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
4162  * @local: mac80211 hw info struct
4163  * @status: RX status
4164  * @mpdu_len: total MPDU length (including FCS)
4165  * @mpdu_offset: offset into MPDU to calculate timestamp at
4166  *
4167  * This function calculates the RX timestamp at the given MPDU offset, taking
4168  * into account what the RX timestamp was. An offset of 0 will just normalize
4169  * the timestamp to TSF at beginning of MPDU reception.
4170  *
4171  * Returns: the calculated timestamp
4172  */
4173 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
4174                                      struct ieee80211_rx_status *status,
4175                                      unsigned int mpdu_len,
4176                                      unsigned int mpdu_offset)
4177 {
4178         u64 ts = status->mactime;
4179         bool mactime_plcp_start;
4180         struct rate_info ri;
4181         u16 rate;
4182         u8 n_ltf;
4183
4184         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
4185                 return 0;
4186
4187         mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
4188                                 RX_FLAG_MACTIME_PLCP_START;
4189
4190         memset(&ri, 0, sizeof(ri));
4191
4192         ri.bw = status->bw;
4193
4194         /* Fill cfg80211 rate info */
4195         switch (status->encoding) {
4196         case RX_ENC_EHT:
4197                 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
4198                 ri.mcs = status->rate_idx;
4199                 ri.nss = status->nss;
4200                 ri.eht_ru_alloc = status->eht.ru;
4201                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4202                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4203                 /* TODO/FIXME: is this right? handle other PPDUs */
4204                 if (mactime_plcp_start) {
4205                         mpdu_offset += 2;
4206                         ts += 36;
4207                 }
4208                 break;
4209         case RX_ENC_HE:
4210                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
4211                 ri.mcs = status->rate_idx;
4212                 ri.nss = status->nss;
4213                 ri.he_ru_alloc = status->he_ru;
4214                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4215                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4216
4217                 /*
4218                  * See P802.11ax_D6.0, section 27.3.4 for
4219                  * VHT PPDU format.
4220                  */
4221                 if (mactime_plcp_start) {
4222                         mpdu_offset += 2;
4223                         ts += 36;
4224
4225                         /*
4226                          * TODO:
4227                          * For HE MU PPDU, add the HE-SIG-B.
4228                          * For HE ER PPDU, add 8us for the HE-SIG-A.
4229                          * For HE TB PPDU, add 4us for the HE-STF.
4230                          * Add the HE-LTF durations - variable.
4231                          */
4232                 }
4233
4234                 break;
4235         case RX_ENC_HT:
4236                 ri.mcs = status->rate_idx;
4237                 ri.flags |= RATE_INFO_FLAGS_MCS;
4238                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4239                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4240
4241                 /*
4242                  * See P802.11REVmd_D3.0, section 19.3.2 for
4243                  * HT PPDU format.
4244                  */
4245                 if (mactime_plcp_start) {
4246                         mpdu_offset += 2;
4247                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
4248                                 ts += 24;
4249                         else
4250                                 ts += 32;
4251
4252                         /*
4253                          * Add Data HT-LTFs per streams
4254                          * TODO: add Extension HT-LTFs, 4us per LTF
4255                          */
4256                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
4257                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
4258                         ts += n_ltf * 4;
4259                 }
4260
4261                 break;
4262         case RX_ENC_VHT:
4263                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
4264                 ri.mcs = status->rate_idx;
4265                 ri.nss = status->nss;
4266                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4267                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4268
4269                 /*
4270                  * See P802.11REVmd_D3.0, section 21.3.2 for
4271                  * VHT PPDU format.
4272                  */
4273                 if (mactime_plcp_start) {
4274                         mpdu_offset += 2;
4275                         ts += 36;
4276
4277                         /*
4278                          * Add VHT-LTFs per streams
4279                          */
4280                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
4281                                 ri.nss + 1 : ri.nss;
4282                         ts += 4 * n_ltf;
4283                 }
4284
4285                 break;
4286         default:
4287                 WARN_ON(1);
4288                 fallthrough;
4289         case RX_ENC_LEGACY: {
4290                 struct ieee80211_supported_band *sband;
4291
4292                 sband = local->hw.wiphy->bands[status->band];
4293                 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
4294
4295                 if (mactime_plcp_start) {
4296                         if (status->band == NL80211_BAND_5GHZ) {
4297                                 ts += 20;
4298                                 mpdu_offset += 2;
4299                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4300                                 ts += 96;
4301                         } else {
4302                                 ts += 192;
4303                         }
4304                 }
4305                 break;
4306                 }
4307         }
4308
4309         rate = cfg80211_calculate_bitrate(&ri);
4310         if (WARN_ONCE(!rate,
4311                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4312                       (unsigned long long)status->flag, status->rate_idx,
4313                       status->nss))
4314                 return 0;
4315
4316         /* rewind from end of MPDU */
4317         if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
4318                 ts -= mpdu_len * 8 * 10 / rate;
4319
4320         ts += mpdu_offset * 8 * 10 / rate;
4321
4322         return ts;
4323 }
4324
4325 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4326 {
4327         struct ieee80211_sub_if_data *sdata;
4328         struct cfg80211_chan_def chandef;
4329
4330         lockdep_assert_wiphy(local->hw.wiphy);
4331
4332         list_for_each_entry(sdata, &local->interfaces, list) {
4333                 /* it might be waiting for the local->mtx, but then
4334                  * by the time it gets it, sdata->wdev.cac_started
4335                  * will no longer be true
4336                  */
4337                 wiphy_delayed_work_cancel(local->hw.wiphy,
4338                                           &sdata->deflink.dfs_cac_timer_work);
4339
4340                 if (sdata->wdev.cac_started) {
4341                         chandef = sdata->vif.bss_conf.chandef;
4342                         ieee80211_link_release_channel(&sdata->deflink);
4343                         cfg80211_cac_event(sdata->dev,
4344                                            &chandef,
4345                                            NL80211_RADAR_CAC_ABORTED,
4346                                            GFP_KERNEL);
4347                 }
4348         }
4349 }
4350
4351 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
4352                                        struct wiphy_work *work)
4353 {
4354         struct ieee80211_local *local =
4355                 container_of(work, struct ieee80211_local, radar_detected_work);
4356         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4357         struct ieee80211_chanctx *ctx;
4358         int num_chanctx = 0;
4359
4360         lockdep_assert_wiphy(local->hw.wiphy);
4361
4362         list_for_each_entry(ctx, &local->chanctx_list, list) {
4363                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4364                         continue;
4365
4366                 num_chanctx++;
4367                 chandef = ctx->conf.def;
4368         }
4369
4370         ieee80211_dfs_cac_cancel(local);
4371
4372         if (num_chanctx > 1)
4373                 /* XXX: multi-channel is not supported yet */
4374                 WARN_ON(1);
4375         else
4376                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4377 }
4378
4379 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4380 {
4381         struct ieee80211_local *local = hw_to_local(hw);
4382
4383         trace_api_radar_detected(local);
4384
4385         wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
4386 }
4387 EXPORT_SYMBOL(ieee80211_radar_detected);
4388
4389 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4390 {
4391         ieee80211_conn_flags_t ret;
4392         int tmp;
4393
4394         switch (c->width) {
4395         case NL80211_CHAN_WIDTH_20:
4396                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4397                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4398                 break;
4399         case NL80211_CHAN_WIDTH_40:
4400                 c->width = NL80211_CHAN_WIDTH_20;
4401                 c->center_freq1 = c->chan->center_freq;
4402                 ret = IEEE80211_CONN_DISABLE_40MHZ |
4403                       IEEE80211_CONN_DISABLE_VHT;
4404                 break;
4405         case NL80211_CHAN_WIDTH_80:
4406                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4407                 /* n_P40 */
4408                 tmp /= 2;
4409                 /* freq_P40 */
4410                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4411                 c->width = NL80211_CHAN_WIDTH_40;
4412                 ret = IEEE80211_CONN_DISABLE_VHT;
4413                 break;
4414         case NL80211_CHAN_WIDTH_80P80:
4415                 c->center_freq2 = 0;
4416                 c->width = NL80211_CHAN_WIDTH_80;
4417                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4418                       IEEE80211_CONN_DISABLE_160MHZ;
4419                 break;
4420         case NL80211_CHAN_WIDTH_160:
4421                 /* n_P20 */
4422                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4423                 /* n_P80 */
4424                 tmp /= 4;
4425                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4426                 c->width = NL80211_CHAN_WIDTH_80;
4427                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4428                       IEEE80211_CONN_DISABLE_160MHZ;
4429                 break;
4430         case NL80211_CHAN_WIDTH_320:
4431                 /* n_P20 */
4432                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4433                 /* n_P160 */
4434                 tmp /= 8;
4435                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4436                 c->width = NL80211_CHAN_WIDTH_160;
4437                 ret = IEEE80211_CONN_DISABLE_320MHZ;
4438                 break;
4439         default:
4440         case NL80211_CHAN_WIDTH_20_NOHT:
4441                 WARN_ON_ONCE(1);
4442                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4443                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4444                 break;
4445         case NL80211_CHAN_WIDTH_1:
4446         case NL80211_CHAN_WIDTH_2:
4447         case NL80211_CHAN_WIDTH_4:
4448         case NL80211_CHAN_WIDTH_8:
4449         case NL80211_CHAN_WIDTH_16:
4450         case NL80211_CHAN_WIDTH_5:
4451         case NL80211_CHAN_WIDTH_10:
4452                 WARN_ON_ONCE(1);
4453                 /* keep c->width */
4454                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4455                 break;
4456         }
4457
4458         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4459
4460         return ret;
4461 }
4462
4463 /*
4464  * Returns true if smps_mode_new is strictly more restrictive than
4465  * smps_mode_old.
4466  */
4467 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4468                                    enum ieee80211_smps_mode smps_mode_new)
4469 {
4470         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4471                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4472                 return false;
4473
4474         switch (smps_mode_old) {
4475         case IEEE80211_SMPS_STATIC:
4476                 return false;
4477         case IEEE80211_SMPS_DYNAMIC:
4478                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4479         case IEEE80211_SMPS_OFF:
4480                 return smps_mode_new != IEEE80211_SMPS_OFF;
4481         default:
4482                 WARN_ON(1);
4483         }
4484
4485         return false;
4486 }
4487
4488 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4489                               struct cfg80211_csa_settings *csa_settings)
4490 {
4491         struct sk_buff *skb;
4492         struct ieee80211_mgmt *mgmt;
4493         struct ieee80211_local *local = sdata->local;
4494         int freq;
4495         int hdr_len = offsetofend(struct ieee80211_mgmt,
4496                                   u.action.u.chan_switch);
4497         u8 *pos;
4498
4499         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4500             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4501                 return -EOPNOTSUPP;
4502
4503         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4504                             5 + /* channel switch announcement element */
4505                             3 + /* secondary channel offset element */
4506                             5 + /* wide bandwidth channel switch announcement */
4507                             8); /* mesh channel switch parameters element */
4508         if (!skb)
4509                 return -ENOMEM;
4510
4511         skb_reserve(skb, local->tx_headroom);
4512         mgmt = skb_put_zero(skb, hdr_len);
4513         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4514                                           IEEE80211_STYPE_ACTION);
4515
4516         eth_broadcast_addr(mgmt->da);
4517         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4518         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4519                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4520         } else {
4521                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4522                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4523         }
4524         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4525         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4526         pos = skb_put(skb, 5);
4527         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4528         *pos++ = 3;                                             /* IE length */
4529         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4530         freq = csa_settings->chandef.chan->center_freq;
4531         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4532         *pos++ = csa_settings->count;                           /* count */
4533
4534         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4535                 enum nl80211_channel_type ch_type;
4536
4537                 skb_put(skb, 3);
4538                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4539                 *pos++ = 1;                                     /* IE length */
4540                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4541                 if (ch_type == NL80211_CHAN_HT40PLUS)
4542                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4543                 else
4544                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4545         }
4546
4547         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4548                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4549
4550                 skb_put(skb, 8);
4551                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4552                 *pos++ = 6;                                     /* IE length */
4553                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4554                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4555                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4556                 *pos++ |= csa_settings->block_tx ?
4557                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4558                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4559                 pos += 2;
4560                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4561                 pos += 2;
4562         }
4563
4564         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4565             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4566             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4567                 skb_put(skb, 5);
4568                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4569         }
4570
4571         ieee80211_tx_skb(sdata, skb);
4572         return 0;
4573 }
4574
4575 static bool
4576 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4577 {
4578         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4579         int skip;
4580
4581         if (end > 0)
4582                 return false;
4583
4584         /* One shot NOA  */
4585         if (data->count[i] == 1)
4586                 return false;
4587
4588         if (data->desc[i].interval == 0)
4589                 return false;
4590
4591         /* End time is in the past, check for repetitions */
4592         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4593         if (data->count[i] < 255) {
4594                 if (data->count[i] <= skip) {
4595                         data->count[i] = 0;
4596                         return false;
4597                 }
4598
4599                 data->count[i] -= skip;
4600         }
4601
4602         data->desc[i].start += skip * data->desc[i].interval;
4603
4604         return true;
4605 }
4606
4607 static bool
4608 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4609                              s32 *offset)
4610 {
4611         bool ret = false;
4612         int i;
4613
4614         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4615                 s32 cur;
4616
4617                 if (!data->count[i])
4618                         continue;
4619
4620                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4621                         ret = true;
4622
4623                 cur = data->desc[i].start - tsf;
4624                 if (cur > *offset)
4625                         continue;
4626
4627                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4628                 if (cur > *offset)
4629                         *offset = cur;
4630         }
4631
4632         return ret;
4633 }
4634
4635 static u32
4636 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4637 {
4638         s32 offset = 0;
4639         int tries = 0;
4640         /*
4641          * arbitrary limit, used to avoid infinite loops when combined NoA
4642          * descriptors cover the full time period.
4643          */
4644         int max_tries = 5;
4645
4646         ieee80211_extend_absent_time(data, tsf, &offset);
4647         do {
4648                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4649                         break;
4650
4651                 tries++;
4652         } while (tries < max_tries);
4653
4654         return offset;
4655 }
4656
4657 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4658 {
4659         u32 next_offset = BIT(31) - 1;
4660         int i;
4661
4662         data->absent = 0;
4663         data->has_next_tsf = false;
4664         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4665                 s32 start;
4666
4667                 if (!data->count[i])
4668                         continue;
4669
4670                 ieee80211_extend_noa_desc(data, tsf, i);
4671                 start = data->desc[i].start - tsf;
4672                 if (start <= 0)
4673                         data->absent |= BIT(i);
4674
4675                 if (next_offset > start)
4676                         next_offset = start;
4677
4678                 data->has_next_tsf = true;
4679         }
4680
4681         if (data->absent)
4682                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4683
4684         data->next_tsf = tsf + next_offset;
4685 }
4686 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4687
4688 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4689                             struct ieee80211_noa_data *data, u32 tsf)
4690 {
4691         int ret = 0;
4692         int i;
4693
4694         memset(data, 0, sizeof(*data));
4695
4696         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4697                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4698
4699                 if (!desc->count || !desc->duration)
4700                         continue;
4701
4702                 data->count[i] = desc->count;
4703                 data->desc[i].start = le32_to_cpu(desc->start_time);
4704                 data->desc[i].duration = le32_to_cpu(desc->duration);
4705                 data->desc[i].interval = le32_to_cpu(desc->interval);
4706
4707                 if (data->count[i] > 1 &&
4708                     data->desc[i].interval < data->desc[i].duration)
4709                         continue;
4710
4711                 ieee80211_extend_noa_desc(data, tsf, i);
4712                 ret++;
4713         }
4714
4715         if (ret)
4716                 ieee80211_update_p2p_noa(data, tsf);
4717
4718         return ret;
4719 }
4720 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4721
4722 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4723                            struct ieee80211_sub_if_data *sdata)
4724 {
4725         u64 tsf = drv_get_tsf(local, sdata);
4726         u64 dtim_count = 0;
4727         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4728         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4729         struct ps_data *ps;
4730         u8 bcns_from_dtim;
4731
4732         if (tsf == -1ULL || !beacon_int || !dtim_period)
4733                 return;
4734
4735         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4736             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4737                 if (!sdata->bss)
4738                         return;
4739
4740                 ps = &sdata->bss->ps;
4741         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4742                 ps = &sdata->u.mesh.ps;
4743         } else {
4744                 return;
4745         }
4746
4747         /*
4748          * actually finds last dtim_count, mac80211 will update in
4749          * __beacon_add_tim().
4750          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4751          */
4752         do_div(tsf, beacon_int);
4753         bcns_from_dtim = do_div(tsf, dtim_period);
4754         /* just had a DTIM */
4755         if (!bcns_from_dtim)
4756                 dtim_count = 0;
4757         else
4758                 dtim_count = dtim_period - bcns_from_dtim;
4759
4760         ps->dtim_count = dtim_count;
4761 }
4762
4763 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4764                                          struct ieee80211_chanctx *ctx)
4765 {
4766         struct ieee80211_link_data *link;
4767         u8 radar_detect = 0;
4768
4769         lockdep_assert_wiphy(local->hw.wiphy);
4770
4771         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4772                 return 0;
4773
4774         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4775                 if (link->reserved_radar_required)
4776                         radar_detect |= BIT(link->reserved_chandef.width);
4777
4778         /*
4779          * An in-place reservation context should not have any assigned vifs
4780          * until it replaces the other context.
4781          */
4782         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4783                 !list_empty(&ctx->assigned_links));
4784
4785         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4786                 if (!link->radar_required)
4787                         continue;
4788
4789                 radar_detect |=
4790                         BIT(link->conf->chandef.width);
4791         }
4792
4793         return radar_detect;
4794 }
4795
4796 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4797                                  const struct cfg80211_chan_def *chandef,
4798                                  enum ieee80211_chanctx_mode chanmode,
4799                                  u8 radar_detect)
4800 {
4801         struct ieee80211_local *local = sdata->local;
4802         struct ieee80211_sub_if_data *sdata_iter;
4803         enum nl80211_iftype iftype = sdata->wdev.iftype;
4804         struct ieee80211_chanctx *ctx;
4805         int total = 1;
4806         struct iface_combination_params params = {
4807                 .radar_detect = radar_detect,
4808         };
4809
4810         lockdep_assert_wiphy(local->hw.wiphy);
4811
4812         if (WARN_ON(hweight32(radar_detect) > 1))
4813                 return -EINVAL;
4814
4815         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4816                     !chandef->chan))
4817                 return -EINVAL;
4818
4819         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4820                 return -EINVAL;
4821
4822         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4823             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4824                 /*
4825                  * always passing this is harmless, since it'll be the
4826                  * same value that cfg80211 finds if it finds the same
4827                  * interface ... and that's always allowed
4828                  */
4829                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4830         }
4831
4832         /* Always allow software iftypes */
4833         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4834                 if (radar_detect)
4835                         return -EINVAL;
4836                 return 0;
4837         }
4838
4839         if (chandef)
4840                 params.num_different_channels = 1;
4841
4842         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4843                 params.iftype_num[iftype] = 1;
4844
4845         list_for_each_entry(ctx, &local->chanctx_list, list) {
4846                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4847                         continue;
4848                 params.radar_detect |=
4849                         ieee80211_chanctx_radar_detect(local, ctx);
4850                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4851                         params.num_different_channels++;
4852                         continue;
4853                 }
4854                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4855                     cfg80211_chandef_compatible(chandef,
4856                                                 &ctx->conf.def))
4857                         continue;
4858                 params.num_different_channels++;
4859         }
4860
4861         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4862                 struct wireless_dev *wdev_iter;
4863
4864                 wdev_iter = &sdata_iter->wdev;
4865
4866                 if (sdata_iter == sdata ||
4867                     !ieee80211_sdata_running(sdata_iter) ||
4868                     cfg80211_iftype_allowed(local->hw.wiphy,
4869                                             wdev_iter->iftype, 0, 1))
4870                         continue;
4871
4872                 params.iftype_num[wdev_iter->iftype]++;
4873                 total++;
4874         }
4875
4876         if (total == 1 && !params.radar_detect)
4877                 return 0;
4878
4879         return cfg80211_check_combinations(local->hw.wiphy, &params);
4880 }
4881
4882 static void
4883 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4884                          void *data)
4885 {
4886         u32 *max_num_different_channels = data;
4887
4888         *max_num_different_channels = max(*max_num_different_channels,
4889                                           c->num_different_channels);
4890 }
4891
4892 int ieee80211_max_num_channels(struct ieee80211_local *local)
4893 {
4894         struct ieee80211_sub_if_data *sdata;
4895         struct ieee80211_chanctx *ctx;
4896         u32 max_num_different_channels = 1;
4897         int err;
4898         struct iface_combination_params params = {0};
4899
4900         lockdep_assert_wiphy(local->hw.wiphy);
4901
4902         list_for_each_entry(ctx, &local->chanctx_list, list) {
4903                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4904                         continue;
4905
4906                 params.num_different_channels++;
4907
4908                 params.radar_detect |=
4909                         ieee80211_chanctx_radar_detect(local, ctx);
4910         }
4911
4912         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4913                 params.iftype_num[sdata->wdev.iftype]++;
4914
4915         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4916                                          ieee80211_iter_max_chans,
4917                                          &max_num_different_channels);
4918         if (err < 0)
4919                 return err;
4920
4921         return max_num_different_channels;
4922 }
4923
4924 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4925                                 struct ieee80211_sta_s1g_cap *caps,
4926                                 struct sk_buff *skb)
4927 {
4928         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4929         struct ieee80211_s1g_cap s1g_capab;
4930         u8 *pos;
4931         int i;
4932
4933         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4934                 return;
4935
4936         if (!caps->s1g)
4937                 return;
4938
4939         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4940         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4941
4942         /* override the capability info */
4943         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4944                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4945
4946                 s1g_capab.capab_info[i] &= ~mask;
4947                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4948         }
4949
4950         /* then MCS and NSS set */
4951         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4952                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4953
4954                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4955                 s1g_capab.supp_mcs_nss[i] |=
4956                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4957         }
4958
4959         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4960         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4961         *pos++ = sizeof(s1g_capab);
4962
4963         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4964 }
4965
4966 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4967                                   struct sk_buff *skb)
4968 {
4969         u8 *pos = skb_put(skb, 3);
4970
4971         *pos++ = WLAN_EID_AID_REQUEST;
4972         *pos++ = 1;
4973         *pos++ = 0;
4974 }
4975
4976 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4977 {
4978         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4979         *buf++ = 7; /* len */
4980         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4981         *buf++ = 0x50;
4982         *buf++ = 0xf2;
4983         *buf++ = 2; /* WME */
4984         *buf++ = 0; /* WME info */
4985         *buf++ = 1; /* WME ver */
4986         *buf++ = qosinfo; /* U-APSD no in use */
4987
4988         return buf;
4989 }
4990
4991 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4992                              unsigned long *frame_cnt,
4993                              unsigned long *byte_cnt)
4994 {
4995         struct txq_info *txqi = to_txq_info(txq);
4996         u32 frag_cnt = 0, frag_bytes = 0;
4997         struct sk_buff *skb;
4998
4999         skb_queue_walk(&txqi->frags, skb) {
5000                 frag_cnt++;
5001                 frag_bytes += skb->len;
5002         }
5003
5004         if (frame_cnt)
5005                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
5006
5007         if (byte_cnt)
5008                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
5009 }
5010 EXPORT_SYMBOL(ieee80211_txq_get_depth);
5011
5012 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
5013         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
5014         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
5015         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
5016         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
5017 };
5018
5019 u16 ieee80211_encode_usf(int listen_interval)
5020 {
5021         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
5022         u16 ui, usf = 0;
5023
5024         /* find greatest USF */
5025         while (usf < IEEE80211_MAX_USF) {
5026                 if (listen_interval % listen_int_usf[usf + 1])
5027                         break;
5028                 usf += 1;
5029         }
5030         ui = listen_interval / listen_int_usf[usf];
5031
5032         /* error if there is a remainder. Should've been checked by user */
5033         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
5034         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
5035                           FIELD_PREP(LISTEN_INT_UI, ui);
5036
5037         return (u16) listen_interval;
5038 }
5039
5040 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
5041 {
5042         const struct ieee80211_sta_he_cap *he_cap;
5043         const struct ieee80211_sta_eht_cap *eht_cap;
5044         struct ieee80211_supported_band *sband;
5045         bool is_ap;
5046         u8 n;
5047
5048         sband = ieee80211_get_sband(sdata);
5049         if (!sband)
5050                 return 0;
5051
5052         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
5053         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
5054         if (!he_cap || !eht_cap)
5055                 return 0;
5056
5057         is_ap = iftype == NL80211_IFTYPE_AP ||
5058                 iftype == NL80211_IFTYPE_P2P_GO;
5059
5060         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
5061                                        &eht_cap->eht_cap_elem,
5062                                        is_ap);
5063         return 2 + 1 +
5064                sizeof(eht_cap->eht_cap_elem) + n +
5065                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
5066                                       eht_cap->eht_cap_elem.phy_cap_info);
5067         return 0;
5068 }
5069
5070 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
5071                                const struct ieee80211_sta_he_cap *he_cap,
5072                                const struct ieee80211_sta_eht_cap *eht_cap,
5073                                u8 *end,
5074                                bool for_ap)
5075 {
5076         u8 mcs_nss_len, ppet_len;
5077         u8 ie_len;
5078         u8 *orig_pos = pos;
5079
5080         /* Make sure we have place for the IE */
5081         if (!he_cap || !eht_cap)
5082                 return orig_pos;
5083
5084         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
5085                                                  &eht_cap->eht_cap_elem,
5086                                                  for_ap);
5087         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
5088                                           eht_cap->eht_cap_elem.phy_cap_info);
5089
5090         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
5091         if ((end - pos) < ie_len)
5092                 return orig_pos;
5093
5094         *pos++ = WLAN_EID_EXTENSION;
5095         *pos++ = ie_len - 2;
5096         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
5097
5098         /* Fixed data */
5099         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
5100         pos += sizeof(eht_cap->eht_cap_elem);
5101
5102         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
5103         pos += mcs_nss_len;
5104
5105         if (ppet_len) {
5106                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
5107                 pos += ppet_len;
5108         }
5109
5110         return pos;
5111 }