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 <[email protected]>
   6  * Copyright 2007       Johannes Berg <[email protected]>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2024 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 const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = {
  50         .mode = IEEE80211_CONN_MODE_EHT,
  51         .bw_limit = IEEE80211_CONN_BW_LIMIT_320,
  52 };
  53
  54 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  55                         enum nl80211_iftype type)
  56 {
  57         __le16 fc = hdr->frame_control;
  58
  59         if (ieee80211_is_data(fc)) {
  60                 if (len < 24) /* drop incorrect hdr len (data) */
  61                         return NULL;
  62
  63                 if (ieee80211_has_a4(fc))
  64                         return NULL;
  65                 if (ieee80211_has_tods(fc))
  66                         return hdr->addr1;
  67                 if (ieee80211_has_fromds(fc))
  68                         return hdr->addr2;
  69
  70                 return hdr->addr3;
  71         }
  72
  73         if (ieee80211_is_s1g_beacon(fc)) {
  74                 struct ieee80211_ext *ext = (void *) hdr;
  75
  76                 return ext->u.s1g_beacon.sa;
  77         }
  78
  79         if (ieee80211_is_mgmt(fc)) {
  80                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  81                         return NULL;
  82                 return hdr->addr3;
  83         }
  84
  85         if (ieee80211_is_ctl(fc)) {
  86                 if (ieee80211_is_pspoll(fc))
  87                         return hdr->addr1;
  88
  89                 if (ieee80211_is_back_req(fc)) {
  90                         switch (type) {
  91                         case NL80211_IFTYPE_STATION:
  92                                 return hdr->addr2;
  93                         case NL80211_IFTYPE_AP:
  94                         case NL80211_IFTYPE_AP_VLAN:
  95                                 return hdr->addr1;
  96                         default:
  97                                 break; /* fall through to the return */
  98                         }
  99                 }
 100         }
 101
 102         return NULL;
 103 }
 104 EXPORT_SYMBOL(ieee80211_get_bssid);
 105
 106 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 107 {
 108         struct sk_buff *skb;
 109         struct ieee80211_hdr *hdr;
 110
 111         skb_queue_walk(&tx->skbs, skb) {
 112                 hdr = (struct ieee80211_hdr *) skb->data;
 113                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 114         }
 115 }
 116
 117 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 118                              int rate, int erp, int short_preamble)
 119 {
 120         int dur;
 121
 122         /* calculate duration (in microseconds, rounded up to next higher
 123          * integer if it includes a fractional microsecond) to send frame of
 124          * len bytes (does not include FCS) at the given rate. Duration will
 125          * also include SIFS.
 126          *
 127          * rate is in 100 kbps, so divident is multiplied by 10 in the
 128          * DIV_ROUND_UP() operations.
 129          */
 130
 131         if (band == NL80211_BAND_5GHZ || erp) {
 132                 /*
 133                  * OFDM:
 134                  *
 135                  * N_DBPS = DATARATE x 4
 136                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 137                  *      (16 = SIGNAL time, 6 = tail bits)
 138                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 139                  *
 140                  * T_SYM = 4 usec
 141                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 142                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 143                  *      signal ext = 6 usec
 144                  */
 145                 dur = 16; /* SIFS + signal ext */
 146                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 147                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 148
 149                 /* rates should already consider the channel bandwidth,
 150                  * don't apply divisor again.
 151                  */
 152                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 153                                         4 * rate); /* T_SYM x N_SYM */
 154         } else {
 155                 /*
 156                  * 802.11b or 802.11g with 802.11b compatibility:
 157                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 158                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 159                  *
 160                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 161                  * aSIFSTime = 10 usec
 162                  * aPreambleLength = 144 usec or 72 usec with short preamble
 163                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 164                  */
 165                 dur = 10; /* aSIFSTime = 10 usec */
 166                 dur += short_preamble ? (72 + 24) : (144 + 48);
 167
 168                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 169         }
 170
 171         return dur;
 172 }
 173
 174 /* Exported duration function for driver use */
 175 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 176                                         struct ieee80211_vif *vif,
 177                                         enum nl80211_band band,
 178                                         size_t frame_len,
 179                                         struct ieee80211_rate *rate)
 180 {
 181         struct ieee80211_sub_if_data *sdata;
 182         u16 dur;
 183         int erp;
 184         bool short_preamble = false;
 185
 186         erp = 0;
 187         if (vif) {
 188                 sdata = vif_to_sdata(vif);
 189                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 190                 if (sdata->deflink.operating_11g_mode)
 191                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 192         }
 193
 194         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 195                                        short_preamble);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 200
 201 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 202                               struct ieee80211_vif *vif, size_t frame_len,
 203                               const struct ieee80211_tx_info *frame_txctl)
 204 {
 205         struct ieee80211_local *local = hw_to_local(hw);
 206         struct ieee80211_rate *rate;
 207         struct ieee80211_sub_if_data *sdata;
 208         bool short_preamble;
 209         int erp, bitrate;
 210         u16 dur;
 211         struct ieee80211_supported_band *sband;
 212
 213         sband = local->hw.wiphy->bands[frame_txctl->band];
 214
 215         short_preamble = false;
 216
 217         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 218
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->deflink.operating_11g_mode)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225         }
 226
 227         bitrate = rate->bitrate;
 228
 229         /* CTS duration */
 230         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 231                                        erp, short_preamble);
 232         /* Data frame duration */
 233         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 234                                         erp, short_preamble);
 235         /* ACK duration */
 236         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                         erp, short_preamble);
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_rts_duration);
 242
 243 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 244                                     struct ieee80211_vif *vif,
 245                                     size_t frame_len,
 246                                     const struct ieee80211_tx_info *frame_txctl)
 247 {
 248         struct ieee80211_local *local = hw_to_local(hw);
 249         struct ieee80211_rate *rate;
 250         struct ieee80211_sub_if_data *sdata;
 251         bool short_preamble;
 252         int erp, bitrate;
 253         u16 dur;
 254         struct ieee80211_supported_band *sband;
 255
 256         sband = local->hw.wiphy->bands[frame_txctl->band];
 257
 258         short_preamble = false;
 259
 260         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 261         erp = 0;
 262         if (vif) {
 263                 sdata = vif_to_sdata(vif);
 264                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 265                 if (sdata->deflink.operating_11g_mode)
 266                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 267         }
 268
 269         bitrate = rate->bitrate;
 270
 271         /* Data frame duration */
 272         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 273                                        erp, short_preamble);
 274         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 275                 /* ACK duration */
 276                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 277                                                 erp, short_preamble);
 278         }
 279
 280         return cpu_to_le16(dur);
 281 }
 282 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 283
 284 static void wake_tx_push_queue(struct ieee80211_local *local,
 285                                struct ieee80211_sub_if_data *sdata,
 286                                struct ieee80211_txq *queue)
 287 {
 288         struct ieee80211_tx_control control = {
 289                 .sta = queue->sta,
 290         };
 291         struct sk_buff *skb;
 292
 293         while (1) {
 294                 skb = ieee80211_tx_dequeue(&local->hw, queue);
 295                 if (!skb)
 296                         break;
 297
 298                 drv_tx(local, &control, skb);
 299         }
 300 }
 301
 302 /* wake_tx_queue handler for driver not implementing a custom one*/
 303 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
 304                                     struct ieee80211_txq *txq)
 305 {
 306         struct ieee80211_local *local = hw_to_local(hw);
 307         struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
 308         struct ieee80211_txq *queue;
 309
 310         spin_lock(&local->handle_wake_tx_queue_lock);
 311
 312         /* Use ieee80211_next_txq() for airtime fairness accounting */
 313         ieee80211_txq_schedule_start(hw, txq->ac);
 314         while ((queue = ieee80211_next_txq(hw, txq->ac))) {
 315                 wake_tx_push_queue(local, sdata, queue);
 316                 ieee80211_return_txq(hw, queue, false);
 317         }
 318         ieee80211_txq_schedule_end(hw, txq->ac);
 319         spin_unlock(&local->handle_wake_tx_queue_lock);
 320 }
 321 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
 322
 323 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 324 {
 325         struct ieee80211_local *local = sdata->local;
 326         struct ieee80211_vif *vif = &sdata->vif;
 327         struct fq *fq = &local->fq;
 328         struct ps_data *ps = NULL;
 329         struct txq_info *txqi;
 330         struct sta_info *sta;
 331         int i;
 332
 333         local_bh_disable();
 334         spin_lock(&fq->lock);
 335
 336         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 337                 goto out;
 338
 339         if (sdata->vif.type == NL80211_IFTYPE_AP)
 340                 ps = &sdata->bss->ps;
 341
 342         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 343                 if (sdata != sta->sdata)
 344                         continue;
 345
 346                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 347                         struct ieee80211_txq *txq = sta->sta.txq[i];
 348
 349                         if (!txq)
 350                                 continue;
 351
 352                         txqi = to_txq_info(txq);
 353
 354                         if (ac != txq->ac)
 355                                 continue;
 356
 357                         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
 358                                                 &txqi->flags))
 359                                 continue;
 360
 361                         spin_unlock(&fq->lock);
 362                         drv_wake_tx_queue(local, txqi);
 363                         spin_lock(&fq->lock);
 364                 }
 365         }
 366
 367         if (!vif->txq)
 368                 goto out;
 369
 370         txqi = to_txq_info(vif->txq);
 371
 372         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
 373             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 374                 goto out;
 375
 376         spin_unlock(&fq->lock);
 377
 378         drv_wake_tx_queue(local, txqi);
 379         local_bh_enable();
 380         return;
 381 out:
 382         spin_unlock(&fq->lock);
 383         local_bh_enable();
 384 }
 385
 386 static void
 387 __releases(&local->queue_stop_reason_lock)
 388 __acquires(&local->queue_stop_reason_lock)
 389 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 390 {
 391         struct ieee80211_sub_if_data *sdata;
 392         int n_acs = IEEE80211_NUM_ACS;
 393         int i;
 394
 395         rcu_read_lock();
 396
 397         if (local->hw.queues < IEEE80211_NUM_ACS)
 398                 n_acs = 1;
 399
 400         for (i = 0; i < local->hw.queues; i++) {
 401                 if (local->queue_stop_reasons[i])
 402                         continue;
 403
 404                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 405                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 406                         int ac;
 407
 408                         for (ac = 0; ac < n_acs; ac++) {
 409                                 int ac_queue = sdata->vif.hw_queue[ac];
 410
 411                                 if (ac_queue == i ||
 412                                     sdata->vif.cab_queue == i)
 413                                         __ieee80211_wake_txqs(sdata, ac);
 414                         }
 415                 }
 416                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 417         }
 418
 419         rcu_read_unlock();
 420 }
 421
 422 void ieee80211_wake_txqs(struct tasklet_struct *t)
 423 {
 424         struct ieee80211_local *local = from_tasklet(local, t,
 425                                                      wake_txqs_tasklet);
 426         unsigned long flags;
 427
 428         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 429         _ieee80211_wake_txqs(local, &flags);
 430         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         trace_wake_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 446                 return;
 447
 448         if (!refcounted) {
 449                 local->q_stop_reasons[queue][reason] = 0;
 450         } else {
 451                 local->q_stop_reasons[queue][reason]--;
 452                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 453                         local->q_stop_reasons[queue][reason] = 0;
 454         }
 455
 456         if (local->q_stop_reasons[queue][reason] == 0)
 457                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 458
 459         if (local->queue_stop_reasons[queue] != 0)
 460                 /* someone still has this queue stopped */
 461                 return;
 462
 463         if (!skb_queue_empty(&local->pending[queue]))
 464                 tasklet_schedule(&local->tx_pending_tasklet);
 465
 466         /*
 467          * Calling _ieee80211_wake_txqs here can be a problem because it may
 468          * release queue_stop_reason_lock which has been taken by
 469          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 470          * release someone's lock, but it is fine because all the callers of
 471          * __ieee80211_wake_queue call it right before releasing the lock.
 472          */
 473         if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 474                 tasklet_schedule(&local->wake_txqs_tasklet);
 475         else
 476                 _ieee80211_wake_txqs(local, flags);
 477 }
 478
 479 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 480                                     enum queue_stop_reason reason,
 481                                     bool refcounted)
 482 {
 483         struct ieee80211_local *local = hw_to_local(hw);
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 487         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 488         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 489 }
 490
 491 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 492 {
 493         ieee80211_wake_queue_by_reason(hw, queue,
 494                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 495                                        false);
 496 }
 497 EXPORT_SYMBOL(ieee80211_wake_queue);
 498
 499 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 500                                    enum queue_stop_reason reason,
 501                                    bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504
 505         trace_stop_queue(local, queue, reason);
 506
 507         if (WARN_ON(queue >= hw->queues))
 508                 return;
 509
 510         if (!refcounted)
 511                 local->q_stop_reasons[queue][reason] = 1;
 512         else
 513                 local->q_stop_reasons[queue][reason]++;
 514
 515         set_bit(reason, &local->queue_stop_reasons[queue]);
 516 }
 517
 518 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 519                                     enum queue_stop_reason reason,
 520                                     bool refcounted)
 521 {
 522         struct ieee80211_local *local = hw_to_local(hw);
 523         unsigned long flags;
 524
 525         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 526         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 527         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 528 }
 529
 530 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 531 {
 532         ieee80211_stop_queue_by_reason(hw, queue,
 533                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 534                                        false);
 535 }
 536 EXPORT_SYMBOL(ieee80211_stop_queue);
 537
 538 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 539                                struct sk_buff *skb)
 540 {
 541         struct ieee80211_hw *hw = &local->hw;
 542         unsigned long flags;
 543         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 544         int queue = info->hw_queue;
 545
 546         if (WARN_ON(!info->control.vif)) {
 547                 ieee80211_free_txskb(&local->hw, skb);
 548                 return;
 549         }
 550
 551         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 552         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 553                                false);
 554         __skb_queue_tail(&local->pending[queue], skb);
 555         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 556                                false, &flags);
 557         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 558 }
 559
 560 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 561                                 struct sk_buff_head *skbs)
 562 {
 563         struct ieee80211_hw *hw = &local->hw;
 564         struct sk_buff *skb;
 565         unsigned long flags;
 566         int queue, i;
 567
 568         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 569         while ((skb = skb_dequeue(skbs))) {
 570                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 571
 572                 if (WARN_ON(!info->control.vif)) {
 573                         ieee80211_free_txskb(&local->hw, skb);
 574                         continue;
 575                 }
 576
 577                 queue = info->hw_queue;
 578
 579                 __ieee80211_stop_queue(hw, queue,
 580                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 581                                 false);
 582
 583                 __skb_queue_tail(&local->pending[queue], skb);
 584         }
 585
 586         for (i = 0; i < hw->queues; i++)
 587                 __ieee80211_wake_queue(hw, i,
 588                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 589                         false, &flags);
 590         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 591 }
 592
 593 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 594                                      unsigned long queues,
 595                                      enum queue_stop_reason reason,
 596                                      bool refcounted)
 597 {
 598         struct ieee80211_local *local = hw_to_local(hw);
 599         unsigned long flags;
 600         int i;
 601
 602         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 603
 604         for_each_set_bit(i, &queues, hw->queues)
 605                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 606
 607         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 608 }
 609
 610 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 611 {
 612         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 613                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 614                                         false);
 615 }
 616 EXPORT_SYMBOL(ieee80211_stop_queues);
 617
 618 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 619 {
 620         struct ieee80211_local *local = hw_to_local(hw);
 621         unsigned long flags;
 622         int ret;
 623
 624         if (WARN_ON(queue >= hw->queues))
 625                 return true;
 626
 627         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 628         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 629                        &local->queue_stop_reasons[queue]);
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631         return ret;
 632 }
 633 EXPORT_SYMBOL(ieee80211_queue_stopped);
 634
 635 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 636                                      unsigned long queues,
 637                                      enum queue_stop_reason reason,
 638                                      bool refcounted)
 639 {
 640         struct ieee80211_local *local = hw_to_local(hw);
 641         unsigned long flags;
 642         int i;
 643
 644         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 645
 646         for_each_set_bit(i, &queues, hw->queues)
 647                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 648
 649         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 650 }
 651
 652 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 653 {
 654         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 655                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 656                                         false);
 657 }
 658 EXPORT_SYMBOL(ieee80211_wake_queues);
 659
 660 static unsigned int
 661 ieee80211_get_vif_queues(struct ieee80211_local *local,
 662                          struct ieee80211_sub_if_data *sdata)
 663 {
 664         unsigned int queues;
 665
 666         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 667                 int ac;
 668
 669                 queues = 0;
 670
 671                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 672                         queues |= BIT(sdata->vif.hw_queue[ac]);
 673                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 674                         queues |= BIT(sdata->vif.cab_queue);
 675         } else {
 676                 /* all queues */
 677                 queues = BIT(local->hw.queues) - 1;
 678         }
 679
 680         return queues;
 681 }
 682
 683 void __ieee80211_flush_queues(struct ieee80211_local *local,
 684                               struct ieee80211_sub_if_data *sdata,
 685                               unsigned int queues, bool drop)
 686 {
 687         if (!local->ops->flush)
 688                 return;
 689
 690         /*
 691          * If no queue was set, or if the HW doesn't support
 692          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 693          */
 694         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 695                 queues = ieee80211_get_vif_queues(local, sdata);
 696
 697         ieee80211_stop_queues_by_reason(&local->hw, queues,
 698                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 699                                         false);
 700
 701         if (drop) {
 702                 struct sta_info *sta;
 703
 704                 /* Purge the queues, so the frames on them won't be
 705                  * sent during __ieee80211_wake_queue()
 706                  */
 707                 list_for_each_entry(sta, &local->sta_list, list) {
 708                         if (sdata != sta->sdata)
 709                                 continue;
 710                         ieee80211_purge_sta_txqs(sta);
 711                 }
 712         }
 713
 714         drv_flush(local, sdata, queues, drop);
 715
 716         ieee80211_wake_queues_by_reason(&local->hw, queues,
 717                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 718                                         false);
 719 }
 720
 721 void ieee80211_flush_queues(struct ieee80211_local *local,
 722                             struct ieee80211_sub_if_data *sdata, bool drop)
 723 {
 724         __ieee80211_flush_queues(local, sdata, 0, drop);
 725 }
 726
 727 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 728                                struct ieee80211_sub_if_data *sdata,
 729                                enum queue_stop_reason reason)
 730 {
 731         ieee80211_stop_queues_by_reason(&local->hw,
 732                                         ieee80211_get_vif_queues(local, sdata),
 733                                         reason, true);
 734 }
 735
 736 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 737                                struct ieee80211_sub_if_data *sdata,
 738                                enum queue_stop_reason reason)
 739 {
 740         ieee80211_wake_queues_by_reason(&local->hw,
 741                                         ieee80211_get_vif_queues(local, sdata),
 742                                         reason, true);
 743 }
 744
 745 static void __iterate_interfaces(struct ieee80211_local *local,
 746                                  u32 iter_flags,
 747                                  void (*iterator)(void *data, u8 *mac,
 748                                                   struct ieee80211_vif *vif),
 749                                  void *data)
 750 {
 751         struct ieee80211_sub_if_data *sdata;
 752         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 753
 754         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 755                 switch (sdata->vif.type) {
 756                 case NL80211_IFTYPE_MONITOR:
 757                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 758                                 continue;
 759                         break;
 760                 case NL80211_IFTYPE_AP_VLAN:
 761                         continue;
 762                 default:
 763                         break;
 764                 }
 765                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 766                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 767                         continue;
 768                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 769                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 770                         continue;
 771                 if (ieee80211_sdata_running(sdata) || !active_only)
 772                         iterator(data, sdata->vif.addr,
 773                                  &sdata->vif);
 774         }
 775
 776         sdata = rcu_dereference_check(local->monitor_sdata,
 777                                       lockdep_is_held(&local->iflist_mtx) ||
 778                                       lockdep_is_held(&local->hw.wiphy->mtx));
 779         if (sdata &&
 780             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 781              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 782                 iterator(data, sdata->vif.addr, &sdata->vif);
 783 }
 784
 785 void ieee80211_iterate_interfaces(
 786         struct ieee80211_hw *hw, u32 iter_flags,
 787         void (*iterator)(void *data, u8 *mac,
 788                          struct ieee80211_vif *vif),
 789         void *data)
 790 {
 791         struct ieee80211_local *local = hw_to_local(hw);
 792
 793         mutex_lock(&local->iflist_mtx);
 794         __iterate_interfaces(local, iter_flags, iterator, data);
 795         mutex_unlock(&local->iflist_mtx);
 796 }
 797 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 798
 799 void ieee80211_iterate_active_interfaces_atomic(
 800         struct ieee80211_hw *hw, u32 iter_flags,
 801         void (*iterator)(void *data, u8 *mac,
 802                          struct ieee80211_vif *vif),
 803         void *data)
 804 {
 805         struct ieee80211_local *local = hw_to_local(hw);
 806
 807         rcu_read_lock();
 808         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 809                              iterator, data);
 810         rcu_read_unlock();
 811 }
 812 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 813
 814 void ieee80211_iterate_active_interfaces_mtx(
 815         struct ieee80211_hw *hw, u32 iter_flags,
 816         void (*iterator)(void *data, u8 *mac,
 817                          struct ieee80211_vif *vif),
 818         void *data)
 819 {
 820         struct ieee80211_local *local = hw_to_local(hw);
 821
 822         lockdep_assert_wiphy(hw->wiphy);
 823
 824         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 825                              iterator, data);
 826 }
 827 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 828
 829 static void __iterate_stations(struct ieee80211_local *local,
 830                                void (*iterator)(void *data,
 831                                                 struct ieee80211_sta *sta),
 832                                void *data)
 833 {
 834         struct sta_info *sta;
 835
 836         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 837                 if (!sta->uploaded)
 838                         continue;
 839
 840                 iterator(data, &sta->sta);
 841         }
 842 }
 843
 844 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 845                         void (*iterator)(void *data,
 846                                          struct ieee80211_sta *sta),
 847                         void *data)
 848 {
 849         struct ieee80211_local *local = hw_to_local(hw);
 850
 851         rcu_read_lock();
 852         __iterate_stations(local, iterator, data);
 853         rcu_read_unlock();
 854 }
 855 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 856
 857 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 858 {
 859         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 860
 861         if (!ieee80211_sdata_running(sdata) ||
 862             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 863                 return NULL;
 864         return &sdata->vif;
 865 }
 866 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 867
 868 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 869 {
 870         if (!vif)
 871                 return NULL;
 872
 873         return &vif_to_sdata(vif)->wdev;
 874 }
 875 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 876
 877 /*
 878  * Nothing should have been stuffed into the workqueue during
 879  * the suspend->resume cycle. Since we can't check each caller
 880  * of this function if we are already quiescing / suspended,
 881  * check here and don't WARN since this can actually happen when
 882  * the rx path (for example) is racing against __ieee80211_suspend
 883  * and suspending / quiescing was set after the rx path checked
 884  * them.
 885  */
 886 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 887 {
 888         if (local->quiescing || (local->suspended && !local->resuming)) {
 889                 pr_warn("queueing ieee80211 work while going to suspend\n");
 890                 return false;
 891         }
 892
 893         return true;
 894 }
 895
 896 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 897 {
 898         struct ieee80211_local *local = hw_to_local(hw);
 899
 900         if (!ieee80211_can_queue_work(local))
 901                 return;
 902
 903         queue_work(local->workqueue, work);
 904 }
 905 EXPORT_SYMBOL(ieee80211_queue_work);
 906
 907 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 908                                   struct delayed_work *dwork,
 909                                   unsigned long delay)
 910 {
 911         struct ieee80211_local *local = hw_to_local(hw);
 912
 913         if (!ieee80211_can_queue_work(local))
 914                 return;
 915
 916         queue_delayed_work(local->workqueue, dwork, delay);
 917 }
 918 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 919
 920 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
 921                                            struct ieee80211_tx_queue_params
 922                                            *qparam, int ac)
 923 {
 924         struct ieee80211_chanctx_conf *chanctx_conf;
 925         const struct ieee80211_reg_rule *rrule;
 926         const struct ieee80211_wmm_ac *wmm_ac;
 927         u16 center_freq = 0;
 928
 929         if (sdata->vif.type != NL80211_IFTYPE_AP &&
 930             sdata->vif.type != NL80211_IFTYPE_STATION)
 931                 return;
 932
 933         rcu_read_lock();
 934         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
 935         if (chanctx_conf)
 936                 center_freq = chanctx_conf->def.chan->center_freq;
 937
 938         if (!center_freq) {
 939                 rcu_read_unlock();
 940                 return;
 941         }
 942
 943         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
 944
 945         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
 946                 rcu_read_unlock();
 947                 return;
 948         }
 949
 950         if (sdata->vif.type == NL80211_IFTYPE_AP)
 951                 wmm_ac = &rrule->wmm_rule.ap[ac];
 952         else
 953                 wmm_ac = &rrule->wmm_rule.client[ac];
 954         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
 955         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
 956         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
 957         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
 958         rcu_read_unlock();
 959 }
 960
 961 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
 962                                bool bss_notify, bool enable_qos)
 963 {
 964         struct ieee80211_sub_if_data *sdata = link->sdata;
 965         struct ieee80211_local *local = sdata->local;
 966         struct ieee80211_tx_queue_params qparam;
 967         struct ieee80211_chanctx_conf *chanctx_conf;
 968         int ac;
 969         bool use_11b;
 970         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
 971         int aCWmin, aCWmax;
 972
 973         if (!local->ops->conf_tx)
 974                 return;
 975
 976         if (local->hw.queues < IEEE80211_NUM_ACS)
 977                 return;
 978
 979         memset(&qparam, 0, sizeof(qparam));
 980
 981         rcu_read_lock();
 982         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
 983         use_11b = (chanctx_conf &&
 984                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
 985                  !link->operating_11g_mode;
 986         rcu_read_unlock();
 987
 988         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
 989
 990         /* Set defaults according to 802.11-2007 Table 7-37 */
 991         aCWmax = 1023;
 992         if (use_11b)
 993                 aCWmin = 31;
 994         else
 995                 aCWmin = 15;
 996
 997         /* Confiure old 802.11b/g medium access rules. */
 998         qparam.cw_max = aCWmax;
 999         qparam.cw_min = aCWmin;
1000         qparam.txop = 0;
1001         qparam.aifs = 2;
1002
1003         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1004                 /* Update if QoS is enabled. */
1005                 if (enable_qos) {
1006                         switch (ac) {
1007                         case IEEE80211_AC_BK:
1008                                 qparam.cw_max = aCWmax;
1009                                 qparam.cw_min = aCWmin;
1010                                 qparam.txop = 0;
1011                                 if (is_ocb)
1012                                         qparam.aifs = 9;
1013                                 else
1014                                         qparam.aifs = 7;
1015                                 break;
1016                         /* never happens but let's not leave undefined */
1017                         default:
1018                         case IEEE80211_AC_BE:
1019                                 qparam.cw_max = aCWmax;
1020                                 qparam.cw_min = aCWmin;
1021                                 qparam.txop = 0;
1022                                 if (is_ocb)
1023                                         qparam.aifs = 6;
1024                                 else
1025                                         qparam.aifs = 3;
1026                                 break;
1027                         case IEEE80211_AC_VI:
1028                                 qparam.cw_max = aCWmin;
1029                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1030                                 if (is_ocb)
1031                                         qparam.txop = 0;
1032                                 else if (use_11b)
1033                                         qparam.txop = 6016/32;
1034                                 else
1035                                         qparam.txop = 3008/32;
1036
1037                                 if (is_ocb)
1038                                         qparam.aifs = 3;
1039                                 else
1040                                         qparam.aifs = 2;
1041                                 break;
1042                         case IEEE80211_AC_VO:
1043                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1044                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1045                                 if (is_ocb)
1046                                         qparam.txop = 0;
1047                                 else if (use_11b)
1048                                         qparam.txop = 3264/32;
1049                                 else
1050                                         qparam.txop = 1504/32;
1051                                 qparam.aifs = 2;
1052                                 break;
1053                         }
1054                 }
1055                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1056
1057                 qparam.uapsd = false;
1058
1059                 link->tx_conf[ac] = qparam;
1060                 drv_conf_tx(local, link, ac, &qparam);
1061         }
1062
1063         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1064             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1065             sdata->vif.type != NL80211_IFTYPE_NAN) {
1066                 link->conf->qos = enable_qos;
1067                 if (bss_notify)
1068                         ieee80211_link_info_change_notify(sdata, link,
1069                                                           BSS_CHANGED_QOS);
1070         }
1071 }
1072
1073 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1074                          u16 transaction, u16 auth_alg, u16 status,
1075                          const u8 *extra, size_t extra_len, const u8 *da,
1076                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1077                          u32 tx_flags)
1078 {
1079         struct ieee80211_local *local = sdata->local;
1080         struct sk_buff *skb;
1081         struct ieee80211_mgmt *mgmt;
1082         bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
1083         struct {
1084                 u8 id;
1085                 u8 len;
1086                 u8 ext_id;
1087                 struct ieee80211_multi_link_elem ml;
1088                 struct ieee80211_mle_basic_common_info basic;
1089         } __packed mle = {
1090                 .id = WLAN_EID_EXTENSION,
1091                 .len = sizeof(mle) - 2,
1092                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1093                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1094                 .basic.len = sizeof(mle.basic),
1095         };
1096         int err;
1097
1098         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1099
1100         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1101         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1102                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1103                             multi_link * sizeof(mle));
1104         if (!skb)
1105                 return;
1106
1107         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1108
1109         mgmt = skb_put_zero(skb, 24 + 6);
1110         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1111                                           IEEE80211_STYPE_AUTH);
1112         memcpy(mgmt->da, da, ETH_ALEN);
1113         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1114         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1115         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1116         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1117         mgmt->u.auth.status_code = cpu_to_le16(status);
1118         if (extra)
1119                 skb_put_data(skb, extra, extra_len);
1120         if (multi_link)
1121                 skb_put_data(skb, &mle, sizeof(mle));
1122
1123         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1124                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1125                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1126                 if (WARN_ON(err)) {
1127                         kfree_skb(skb);
1128                         return;
1129                 }
1130         }
1131
1132         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1133                                         tx_flags;
1134         ieee80211_tx_skb(sdata, skb);
1135 }
1136
1137 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1138                                     const u8 *da, const u8 *bssid,
1139                                     u16 stype, u16 reason,
1140                                     bool send_frame, u8 *frame_buf)
1141 {
1142         struct ieee80211_local *local = sdata->local;
1143         struct sk_buff *skb;
1144         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1145
1146         /* build frame */
1147         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1148         mgmt->duration = 0; /* initialize only */
1149         mgmt->seq_ctrl = 0; /* initialize only */
1150         memcpy(mgmt->da, da, ETH_ALEN);
1151         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1152         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1153         /* u.deauth.reason_code == u.disassoc.reason_code */
1154         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1155
1156         if (send_frame) {
1157                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1158                                     IEEE80211_DEAUTH_FRAME_LEN);
1159                 if (!skb)
1160                         return;
1161
1162                 skb_reserve(skb, local->hw.extra_tx_headroom);
1163
1164                 /* copy in frame */
1165                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1166
1167                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1168                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1169                         IEEE80211_SKB_CB(skb)->flags |=
1170                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1171
1172                 ieee80211_tx_skb(sdata, skb);
1173         }
1174 }
1175
1176 static int ieee80211_put_s1g_cap(struct sk_buff *skb,
1177                                  struct ieee80211_sta_s1g_cap *s1g_cap)
1178 {
1179         if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap))
1180                 return -ENOBUFS;
1181
1182         skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES);
1183         skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap));
1184
1185         skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap));
1186         skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
1187
1188         return 0;
1189 }
1190
1191 static int ieee80211_put_preq_ies_band(struct sk_buff *skb,
1192                                        struct ieee80211_sub_if_data *sdata,
1193                                        const u8 *ie, size_t ie_len,
1194                                        size_t *offset,
1195                                        enum nl80211_band band,
1196                                        u32 rate_mask,
1197                                        struct cfg80211_chan_def *chandef,
1198                                        u32 flags)
1199 {
1200         struct ieee80211_local *local = sdata->local;
1201         struct ieee80211_supported_band *sband;
1202         int i, err;
1203         size_t noffset;
1204         u32 rate_flags;
1205         bool have_80mhz = false;
1206
1207         *offset = 0;
1208
1209         sband = local->hw.wiphy->bands[band];
1210         if (WARN_ON_ONCE(!sband))
1211                 return 0;
1212
1213         rate_flags = ieee80211_chandef_rate_flags(chandef);
1214
1215         /* For direct scan add S1G IE and consider its override bits */
1216         if (band == NL80211_BAND_S1GHZ)
1217                 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap);
1218
1219         err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1220                                         ~rate_mask, WLAN_EID_SUPP_RATES);
1221         if (err)
1222                 return err;
1223
1224         /* insert "request information" if in custom IEs */
1225         if (ie && ie_len) {
1226                 static const u8 before_extrates[] = {
1227                         WLAN_EID_SSID,
1228                         WLAN_EID_SUPP_RATES,
1229                         WLAN_EID_REQUEST,
1230                 };
1231                 noffset = ieee80211_ie_split(ie, ie_len,
1232                                              before_extrates,
1233                                              ARRAY_SIZE(before_extrates),
1234                                              *offset);
1235                 if (skb_tailroom(skb) < noffset - *offset)
1236                         return -ENOBUFS;
1237                 skb_put_data(skb, ie + *offset, noffset - *offset);
1238                 *offset = noffset;
1239         }
1240
1241         err = ieee80211_put_srates_elem(skb, sband, 0, rate_flags,
1242                                         ~rate_mask, WLAN_EID_EXT_SUPP_RATES);
1243         if (err)
1244                 return err;
1245
1246         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1247                 if (skb_tailroom(skb) < 3)
1248                         return -ENOBUFS;
1249                 skb_put_u8(skb, WLAN_EID_DS_PARAMS);
1250                 skb_put_u8(skb, 1);
1251                 skb_put_u8(skb,
1252                            ieee80211_frequency_to_channel(chandef->chan->center_freq));
1253         }
1254
1255         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1256                 return 0;
1257
1258         /* insert custom IEs that go before HT */
1259         if (ie && ie_len) {
1260                 static const u8 before_ht[] = {
1261                         /*
1262                          * no need to list the ones split off already
1263                          * (or generated here)
1264                          */
1265                         WLAN_EID_DS_PARAMS,
1266                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1267                 };
1268                 noffset = ieee80211_ie_split(ie, ie_len,
1269                                              before_ht, ARRAY_SIZE(before_ht),
1270                                              *offset);
1271                 if (skb_tailroom(skb) < noffset - *offset)
1272                         return -ENOBUFS;
1273                 skb_put_data(skb, ie + *offset, noffset - *offset);
1274                 *offset = noffset;
1275         }
1276
1277         if (sband->ht_cap.ht_supported) {
1278                 u8 *pos;
1279
1280                 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
1281                         return -ENOBUFS;
1282
1283                 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
1284                 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1285                                           sband->ht_cap.cap);
1286         }
1287
1288         /* insert custom IEs that go before VHT */
1289         if (ie && ie_len) {
1290                 static const u8 before_vht[] = {
1291                         /*
1292                          * no need to list the ones split off already
1293                          * (or generated here)
1294                          */
1295                         WLAN_EID_BSS_COEX_2040,
1296                         WLAN_EID_EXT_CAPABILITY,
1297                         WLAN_EID_SSID_LIST,
1298                         WLAN_EID_CHANNEL_USAGE,
1299                         WLAN_EID_INTERWORKING,
1300                         WLAN_EID_MESH_ID,
1301                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1302                 };
1303                 noffset = ieee80211_ie_split(ie, ie_len,
1304                                              before_vht, ARRAY_SIZE(before_vht),
1305                                              *offset);
1306                 if (skb_tailroom(skb) < noffset - *offset)
1307                         return -ENOBUFS;
1308                 skb_put_data(skb, ie + *offset, noffset - *offset);
1309                 *offset = noffset;
1310         }
1311
1312         /* Check if any channel in this sband supports at least 80 MHz */
1313         for (i = 0; i < sband->n_channels; i++) {
1314                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1315                                                 IEEE80211_CHAN_NO_80MHZ))
1316                         continue;
1317
1318                 have_80mhz = true;
1319                 break;
1320         }
1321
1322         if (sband->vht_cap.vht_supported && have_80mhz) {
1323                 u8 *pos;
1324
1325                 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
1326                         return -ENOBUFS;
1327
1328                 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
1329                 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1330                                            sband->vht_cap.cap);
1331         }
1332
1333         /* insert custom IEs that go before HE */
1334         if (ie && ie_len) {
1335                 static const u8 before_he[] = {
1336                         /*
1337                          * no need to list the ones split off before VHT
1338                          * or generated here
1339                          */
1340                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1341                         WLAN_EID_AP_CSN,
1342                         /* TODO: add 11ah/11aj/11ak elements */
1343                 };
1344                 noffset = ieee80211_ie_split(ie, ie_len,
1345                                              before_he, ARRAY_SIZE(before_he),
1346                                              *offset);
1347                 if (skb_tailroom(skb) < noffset - *offset)
1348                         return -ENOBUFS;
1349                 skb_put_data(skb, ie + *offset, noffset - *offset);
1350                 *offset = noffset;
1351         }
1352
1353         if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1354                                          IEEE80211_CHAN_NO_HE)) {
1355                 err = ieee80211_put_he_cap(skb, sdata, sband, NULL);
1356                 if (err)
1357                         return err;
1358         }
1359
1360         if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1361                                          IEEE80211_CHAN_NO_HE |
1362                                          IEEE80211_CHAN_NO_EHT)) {
1363                 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL);
1364                 if (err)
1365                         return err;
1366         }
1367
1368         err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF);
1369         if (err)
1370                 return err;
1371
1372         /*
1373          * If adding more here, adjust code in main.c
1374          * that calculates local->scan_ies_len.
1375          */
1376
1377         return 0;
1378 }
1379
1380 static int ieee80211_put_preq_ies(struct sk_buff *skb,
1381                                   struct ieee80211_sub_if_data *sdata,
1382                                   struct ieee80211_scan_ies *ie_desc,
1383                                   const u8 *ie, size_t ie_len,
1384                                   u8 bands_used, u32 *rate_masks,
1385                                   struct cfg80211_chan_def *chandef,
1386                                   u32 flags)
1387 {
1388         size_t custom_ie_offset = 0;
1389         int i, err;
1390
1391         memset(ie_desc, 0, sizeof(*ie_desc));
1392
1393         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1394                 if (bands_used & BIT(i)) {
1395                         ie_desc->ies[i] = skb_tail_pointer(skb);
1396                         err = ieee80211_put_preq_ies_band(skb, sdata,
1397                                                           ie, ie_len,
1398                                                           &custom_ie_offset,
1399                                                           i, rate_masks[i],
1400                                                           chandef, flags);
1401                         if (err)
1402                                 return err;
1403                         ie_desc->len[i] = skb_tail_pointer(skb) -
1404                                           ie_desc->ies[i];
1405                 }
1406         }
1407
1408         /* add any remaining custom IEs */
1409         if (ie && ie_len) {
1410                 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset,
1411                               "not enough space for preq custom IEs\n"))
1412                         return -ENOBUFS;
1413                 ie_desc->common_ies = skb_tail_pointer(skb);
1414                 skb_put_data(skb, ie + custom_ie_offset,
1415                              ie_len - custom_ie_offset);
1416                 ie_desc->common_ie_len = skb_tail_pointer(skb) -
1417                                          ie_desc->common_ies;
1418         }
1419
1420         return 0;
1421 };
1422
1423 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1424                              size_t buffer_len,
1425                              struct ieee80211_scan_ies *ie_desc,
1426                              const u8 *ie, size_t ie_len,
1427                              u8 bands_used, u32 *rate_masks,
1428                              struct cfg80211_chan_def *chandef,
1429                              u32 flags)
1430 {
1431         struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL);
1432         uintptr_t offs;
1433         int ret, i;
1434         u8 *start;
1435
1436         if (!skb)
1437                 return -ENOMEM;
1438
1439         start = skb_tail_pointer(skb);
1440         memset(start, 0, skb_tailroom(skb));
1441         ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,
1442                                      bands_used, rate_masks, chandef,
1443                                      flags);
1444         if (ret < 0) {
1445                 goto out;
1446         }
1447
1448         if (skb->len > buffer_len) {
1449                 ret = -ENOBUFS;
1450                 goto out;
1451         }
1452
1453         memcpy(buffer, start, skb->len);
1454
1455         /* adjust ie_desc for copy */
1456         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1457                 offs = ie_desc->ies[i] - start;
1458                 ie_desc->ies[i] = buffer + offs;
1459         }
1460         offs = ie_desc->common_ies - start;
1461         ie_desc->common_ies = buffer + offs;
1462
1463         ret = skb->len;
1464 out:
1465         consume_skb(skb);
1466         return ret;
1467 }
1468
1469 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1470                                           const u8 *src, const u8 *dst,
1471                                           u32 ratemask,
1472                                           struct ieee80211_channel *chan,
1473                                           const u8 *ssid, size_t ssid_len,
1474                                           const u8 *ie, size_t ie_len,
1475                                           u32 flags)
1476 {
1477         struct ieee80211_local *local = sdata->local;
1478         struct cfg80211_chan_def chandef;
1479         struct sk_buff *skb;
1480         struct ieee80211_mgmt *mgmt;
1481         u32 rate_masks[NUM_NL80211_BANDS] = {};
1482         struct ieee80211_scan_ies dummy_ie_desc;
1483
1484         /*
1485          * Do not send DS Channel parameter for directed probe requests
1486          * in order to maximize the chance that we get a response.  Some
1487          * badly-behaved APs don't respond when this parameter is included.
1488          */
1489         chandef.width = sdata->vif.bss_conf.chanreq.oper.width;
1490         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1491                 chandef.chan = NULL;
1492         else
1493                 chandef.chan = chan;
1494
1495         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1496                                      local->scan_ies_len + ie_len);
1497         if (!skb)
1498                 return NULL;
1499
1500         rate_masks[chan->band] = ratemask;
1501         ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc,
1502                                ie, ie_len, BIT(chan->band),
1503                                rate_masks, &chandef, flags);
1504
1505         if (dst) {
1506                 mgmt = (struct ieee80211_mgmt *) skb->data;
1507                 memcpy(mgmt->da, dst, ETH_ALEN);
1508                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1509         }
1510
1511         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1512
1513         return skb;
1514 }
1515
1516 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1517                             struct ieee802_11_elems *elems,
1518                             enum nl80211_band band, u32 *basic_rates)
1519 {
1520         struct ieee80211_supported_band *sband;
1521         size_t num_rates;
1522         u32 supp_rates, rate_flags;
1523         int i, j;
1524
1525         sband = sdata->local->hw.wiphy->bands[band];
1526         if (WARN_ON(!sband))
1527                 return 1;
1528
1529         rate_flags =
1530                 ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chanreq.oper);
1531
1532         num_rates = sband->n_bitrates;
1533         supp_rates = 0;
1534         for (i = 0; i < elems->supp_rates_len +
1535                      elems->ext_supp_rates_len; i++) {
1536                 u8 rate = 0;
1537                 int own_rate;
1538                 bool is_basic;
1539                 if (i < elems->supp_rates_len)
1540                         rate = elems->supp_rates[i];
1541                 else if (elems->ext_supp_rates)
1542                         rate = elems->ext_supp_rates
1543                                 [i - elems->supp_rates_len];
1544                 own_rate = 5 * (rate & 0x7f);
1545                 is_basic = !!(rate & 0x80);
1546
1547                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1548                         continue;
1549
1550                 for (j = 0; j < num_rates; j++) {
1551                         int brate;
1552                         if ((rate_flags & sband->bitrates[j].flags)
1553                             != rate_flags)
1554                                 continue;
1555
1556                         brate = sband->bitrates[j].bitrate;
1557
1558                         if (brate == own_rate) {
1559                                 supp_rates |= BIT(j);
1560                                 if (basic_rates && is_basic)
1561                                         *basic_rates |= BIT(j);
1562                         }
1563                 }
1564         }
1565         return supp_rates;
1566 }
1567
1568 void ieee80211_stop_device(struct ieee80211_local *local)
1569 {
1570         ieee80211_led_radio(local, false);
1571         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1572
1573         wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1574
1575         flush_workqueue(local->workqueue);
1576         wiphy_work_flush(local->hw.wiphy, NULL);
1577         drv_stop(local);
1578 }
1579
1580 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1581                                            bool aborted)
1582 {
1583         /* It's possible that we don't handle the scan completion in
1584          * time during suspend, so if it's still marked as completed
1585          * here, queue the work and flush it to clean things up.
1586          * Instead of calling the worker function directly here, we
1587          * really queue it to avoid potential races with other flows
1588          * scheduling the same work.
1589          */
1590         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1591                 /* If coming from reconfiguration failure, abort the scan so
1592                  * we don't attempt to continue a partial HW scan - which is
1593                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1594                  * completed scan, and a 5 GHz portion is still pending.
1595                  */
1596                 if (aborted)
1597                         set_bit(SCAN_ABORTED, &local->scanning);
1598                 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
1599                 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
1600         }
1601 }
1602
1603 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1604 {
1605         struct ieee80211_sub_if_data *sdata;
1606         struct ieee80211_chanctx *ctx;
1607
1608         lockdep_assert_wiphy(local->hw.wiphy);
1609
1610         /*
1611          * We get here if during resume the device can't be restarted properly.
1612          * We might also get here if this happens during HW reset, which is a
1613          * slightly different situation and we need to drop all connections in
1614          * the latter case.
1615          *
1616          * Ask cfg80211 to turn off all interfaces, this will result in more
1617          * warnings but at least we'll then get into a clean stopped state.
1618          */
1619
1620         local->resuming = false;
1621         local->suspended = false;
1622         local->in_reconfig = false;
1623         local->reconfig_failure = true;
1624
1625         ieee80211_flush_completed_scan(local, true);
1626
1627         /* scheduled scan clearly can't be running any more, but tell
1628          * cfg80211 and clear local state
1629          */
1630         ieee80211_sched_scan_end(local);
1631
1632         list_for_each_entry(sdata, &local->interfaces, list)
1633                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1634
1635         /* Mark channel contexts as not being in the driver any more to avoid
1636          * removing them from the driver during the shutdown process...
1637          */
1638         list_for_each_entry(ctx, &local->chanctx_list, list)
1639                 ctx->driver_present = false;
1640 }
1641
1642 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1643                                      struct ieee80211_sub_if_data *sdata,
1644                                      struct ieee80211_link_data *link)
1645 {
1646         struct ieee80211_chanctx_conf *conf;
1647         struct ieee80211_chanctx *ctx;
1648
1649         lockdep_assert_wiphy(local->hw.wiphy);
1650
1651         conf = rcu_dereference_protected(link->conf->chanctx_conf,
1652                                          lockdep_is_held(&local->hw.wiphy->mtx));
1653         if (conf) {
1654                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1655                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
1656         }
1657 }
1658
1659 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1660 {
1661         struct ieee80211_local *local = sdata->local;
1662         struct sta_info *sta;
1663
1664         lockdep_assert_wiphy(local->hw.wiphy);
1665
1666         /* add STAs back */
1667         list_for_each_entry(sta, &local->sta_list, list) {
1668                 enum ieee80211_sta_state state;
1669
1670                 if (!sta->uploaded || sta->sdata != sdata)
1671                         continue;
1672
1673                 for (state = IEEE80211_STA_NOTEXIST;
1674                      state < sta->sta_state; state++)
1675                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1676                                               state + 1));
1677         }
1678 }
1679
1680 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1681 {
1682         struct cfg80211_nan_func *func, **funcs;
1683         int res, id, i = 0;
1684
1685         res = drv_start_nan(sdata->local, sdata,
1686                             &sdata->u.nan.conf);
1687         if (WARN_ON(res))
1688                 return res;
1689
1690         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1691                         sizeof(*funcs),
1692                         GFP_KERNEL);
1693         if (!funcs)
1694                 return -ENOMEM;
1695
1696         /* Add all the functions:
1697          * This is a little bit ugly. We need to call a potentially sleeping
1698          * callback for each NAN function, so we can't hold the spinlock.
1699          */
1700         spin_lock_bh(&sdata->u.nan.func_lock);
1701
1702         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1703                 funcs[i++] = func;
1704
1705         spin_unlock_bh(&sdata->u.nan.func_lock);
1706
1707         for (i = 0; funcs[i]; i++) {
1708                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1709                 if (WARN_ON(res))
1710                         ieee80211_nan_func_terminated(&sdata->vif,
1711                                                       funcs[i]->instance_id,
1712                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1713                                                       GFP_KERNEL);
1714         }
1715
1716         kfree(funcs);
1717
1718         return 0;
1719 }
1720
1721 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
1722                                         struct ieee80211_sub_if_data *sdata,
1723                                         u64 changed)
1724 {
1725         int link_id;
1726
1727         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
1728                 struct ieee80211_link_data *link;
1729
1730                 if (!(sdata->vif.active_links & BIT(link_id)))
1731                         continue;
1732
1733                 link = sdata_dereference(sdata->link[link_id], sdata);
1734                 if (!link)
1735                         continue;
1736
1737                 if (rcu_access_pointer(link->u.ap.beacon))
1738                         drv_start_ap(local, sdata, link->conf);
1739
1740                 if (!link->conf->enable_beacon)
1741                         continue;
1742
1743                 changed |= BSS_CHANGED_BEACON |
1744                            BSS_CHANGED_BEACON_ENABLED;
1745
1746                 ieee80211_link_info_change_notify(sdata, link, changed);
1747         }
1748 }
1749
1750 int ieee80211_reconfig(struct ieee80211_local *local)
1751 {
1752         struct ieee80211_hw *hw = &local->hw;
1753         struct ieee80211_sub_if_data *sdata;
1754         struct ieee80211_chanctx *ctx;
1755         struct sta_info *sta;
1756         int res, i;
1757         bool reconfig_due_to_wowlan = false;
1758         struct ieee80211_sub_if_data *sched_scan_sdata;
1759         struct cfg80211_sched_scan_request *sched_scan_req;
1760         bool sched_scan_stopped = false;
1761         bool suspended = local->suspended;
1762         bool in_reconfig = false;
1763
1764         lockdep_assert_wiphy(local->hw.wiphy);
1765
1766         /* nothing to do if HW shouldn't run */
1767         if (!local->open_count)
1768                 goto wake_up;
1769
1770 #ifdef CONFIG_PM
1771         if (suspended)
1772                 local->resuming = true;
1773
1774         if (local->wowlan) {
1775                 /*
1776                  * In the wowlan case, both mac80211 and the device
1777                  * are functional when the resume op is called, so
1778                  * clear local->suspended so the device could operate
1779                  * normally (e.g. pass rx frames).
1780                  */
1781                 local->suspended = false;
1782                 res = drv_resume(local);
1783                 local->wowlan = false;
1784                 if (res < 0) {
1785                         local->resuming = false;
1786                         return res;
1787                 }
1788                 if (res == 0)
1789                         goto wake_up;
1790                 WARN_ON(res > 1);
1791                 /*
1792                  * res is 1, which means the driver requested
1793                  * to go through a regular reset on wakeup.
1794                  * restore local->suspended in this case.
1795                  */
1796                 reconfig_due_to_wowlan = true;
1797                 local->suspended = true;
1798         }
1799 #endif
1800
1801         /*
1802          * In case of hw_restart during suspend (without wowlan),
1803          * cancel restart work, as we are reconfiguring the device
1804          * anyway.
1805          * Note that restart_work is scheduled on a frozen workqueue,
1806          * so we can't deadlock in this case.
1807          */
1808         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1809                 cancel_work_sync(&local->restart_work);
1810
1811         local->started = false;
1812
1813         /*
1814          * Upon resume hardware can sometimes be goofy due to
1815          * various platform / driver / bus issues, so restarting
1816          * the device may at times not work immediately. Propagate
1817          * the error.
1818          */
1819         res = drv_start(local);
1820         if (res) {
1821                 if (suspended)
1822                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1823                 else
1824                         WARN(1, "Hardware became unavailable during restart.\n");
1825                 ieee80211_handle_reconfig_failure(local);
1826                 return res;
1827         }
1828
1829         /* setup fragmentation threshold */
1830         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1831
1832         /* setup RTS threshold */
1833         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1834
1835         /* reset coverage class */
1836         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1837
1838         ieee80211_led_radio(local, true);
1839         ieee80211_mod_tpt_led_trig(local,
1840                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1841
1842         /* add interfaces */
1843         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1844         if (sdata) {
1845                 /* in HW restart it exists already */
1846                 WARN_ON(local->resuming);
1847                 res = drv_add_interface(local, sdata);
1848                 if (WARN_ON(res)) {
1849                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1850                         synchronize_net();
1851                         kfree(sdata);
1852                 }
1853         }
1854
1855         list_for_each_entry(sdata, &local->interfaces, list) {
1856                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1857                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1858                     ieee80211_sdata_running(sdata)) {
1859                         res = drv_add_interface(local, sdata);
1860                         if (WARN_ON(res))
1861                                 break;
1862                 }
1863         }
1864
1865         /* If adding any of the interfaces failed above, roll back and
1866          * report failure.
1867          */
1868         if (res) {
1869                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1870                                                      list)
1871                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1872                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1873                             ieee80211_sdata_running(sdata))
1874                                 drv_remove_interface(local, sdata);
1875                 ieee80211_handle_reconfig_failure(local);
1876                 return res;
1877         }
1878
1879         /* add channel contexts */
1880         list_for_each_entry(ctx, &local->chanctx_list, list)
1881                 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1882                         WARN_ON(drv_add_chanctx(local, ctx));
1883
1884         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1885         if (sdata && ieee80211_sdata_running(sdata))
1886                 ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
1887
1888         /* reconfigure hardware */
1889         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL |
1890                                    IEEE80211_CONF_CHANGE_MONITOR |
1891                                    IEEE80211_CONF_CHANGE_PS |
1892                                    IEEE80211_CONF_CHANGE_RETRY_LIMITS |
1893                                    IEEE80211_CONF_CHANGE_IDLE);
1894
1895         ieee80211_configure_filter(local);
1896
1897         /* Finally also reconfigure all the BSS information */
1898         list_for_each_entry(sdata, &local->interfaces, list) {
1899                 /* common change flags for all interface types - link only */
1900                 u64 changed = BSS_CHANGED_ERP_CTS_PROT |
1901                               BSS_CHANGED_ERP_PREAMBLE |
1902                               BSS_CHANGED_ERP_SLOT |
1903                               BSS_CHANGED_HT |
1904                               BSS_CHANGED_BASIC_RATES |
1905                               BSS_CHANGED_BEACON_INT |
1906                               BSS_CHANGED_BSSID |
1907                               BSS_CHANGED_CQM |
1908                               BSS_CHANGED_QOS |
1909                               BSS_CHANGED_TXPOWER |
1910                               BSS_CHANGED_MCAST_RATE;
1911                 struct ieee80211_link_data *link = NULL;
1912                 unsigned int link_id;
1913                 u32 active_links = 0;
1914
1915                 if (!ieee80211_sdata_running(sdata))
1916                         continue;
1917
1918                 if (ieee80211_vif_is_mld(&sdata->vif)) {
1919                         struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
1920                                 [0] = &sdata->vif.bss_conf,
1921                         };
1922
1923                         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1924                                 /* start with a single active link */
1925                                 active_links = sdata->vif.active_links;
1926                                 link_id = ffs(active_links) - 1;
1927                                 sdata->vif.active_links = BIT(link_id);
1928                         }
1929
1930                         drv_change_vif_links(local, sdata, 0,
1931                                              sdata->vif.active_links,
1932                                              old);
1933                 }
1934
1935                 sdata->restart_active_links = active_links;
1936
1937                 for (link_id = 0;
1938                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
1939                      link_id++) {
1940                         if (!ieee80211_vif_link_active(&sdata->vif, link_id))
1941                                 continue;
1942
1943                         link = sdata_dereference(sdata->link[link_id], sdata);
1944                         if (!link)
1945                                 continue;
1946
1947                         ieee80211_assign_chanctx(local, sdata, link);
1948                 }
1949
1950                 switch (sdata->vif.type) {
1951                 case NL80211_IFTYPE_AP_VLAN:
1952                 case NL80211_IFTYPE_MONITOR:
1953                         break;
1954                 case NL80211_IFTYPE_ADHOC:
1955                         if (sdata->vif.cfg.ibss_joined)
1956                                 WARN_ON(drv_join_ibss(local, sdata));
1957                         fallthrough;
1958                 default:
1959                         ieee80211_reconfig_stations(sdata);
1960                         fallthrough;
1961                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1962                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1963                                 drv_conf_tx(local, &sdata->deflink, i,
1964                                             &sdata->deflink.tx_conf[i]);
1965                         break;
1966                 }
1967
1968                 if (sdata->vif.bss_conf.mu_mimo_owner)
1969                         changed |= BSS_CHANGED_MU_GROUPS;
1970
1971                 if (!ieee80211_vif_is_mld(&sdata->vif))
1972                         changed |= BSS_CHANGED_IDLE;
1973
1974                 switch (sdata->vif.type) {
1975                 case NL80211_IFTYPE_STATION:
1976                         if (!ieee80211_vif_is_mld(&sdata->vif)) {
1977                                 changed |= BSS_CHANGED_ASSOC |
1978                                            BSS_CHANGED_ARP_FILTER |
1979                                            BSS_CHANGED_PS;
1980
1981                                 /* Re-send beacon info report to the driver */
1982                                 if (sdata->deflink.u.mgd.have_beacon)
1983                                         changed |= BSS_CHANGED_BEACON_INFO;
1984
1985                                 if (sdata->vif.bss_conf.max_idle_period ||
1986                                     sdata->vif.bss_conf.protected_keep_alive)
1987                                         changed |= BSS_CHANGED_KEEP_ALIVE;
1988
1989                                 ieee80211_bss_info_change_notify(sdata,
1990                                                                  changed);
1991                         } else if (!WARN_ON(!link)) {
1992                                 ieee80211_link_info_change_notify(sdata, link,
1993                                                                   changed);
1994                                 changed = BSS_CHANGED_ASSOC |
1995                                           BSS_CHANGED_IDLE |
1996                                           BSS_CHANGED_PS |
1997                                           BSS_CHANGED_ARP_FILTER;
1998                                 ieee80211_vif_cfg_change_notify(sdata, changed);
1999                         }
2000                         break;
2001                 case NL80211_IFTYPE_OCB:
2002                         changed |= BSS_CHANGED_OCB;
2003                         ieee80211_bss_info_change_notify(sdata, changed);
2004                         break;
2005                 case NL80211_IFTYPE_ADHOC:
2006                         changed |= BSS_CHANGED_IBSS;
2007                         fallthrough;
2008                 case NL80211_IFTYPE_AP:
2009                         changed |= BSS_CHANGED_P2P_PS;
2010
2011                         if (ieee80211_vif_is_mld(&sdata->vif))
2012                                 ieee80211_vif_cfg_change_notify(sdata,
2013                                                                 BSS_CHANGED_SSID);
2014                         else
2015                                 changed |= BSS_CHANGED_SSID;
2016
2017                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2018                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2019                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2020                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2021
2022                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2023                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2024
2025                                 if (ieee80211_vif_is_mld(&sdata->vif)) {
2026                                         ieee80211_reconfig_ap_links(local,
2027                                                                     sdata,
2028                                                                     changed);
2029                                         break;
2030                                 }
2031
2032                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2033                                         drv_start_ap(local, sdata,
2034                                                      sdata->deflink.conf);
2035                         }
2036                         fallthrough;
2037                 case NL80211_IFTYPE_MESH_POINT:
2038                         if (sdata->vif.bss_conf.enable_beacon) {
2039                                 changed |= BSS_CHANGED_BEACON |
2040                                            BSS_CHANGED_BEACON_ENABLED;
2041                                 ieee80211_bss_info_change_notify(sdata, changed);
2042                         }
2043                         break;
2044                 case NL80211_IFTYPE_NAN:
2045                         res = ieee80211_reconfig_nan(sdata);
2046                         if (res < 0) {
2047                                 ieee80211_handle_reconfig_failure(local);
2048                                 return res;
2049                         }
2050                         break;
2051                 case NL80211_IFTYPE_AP_VLAN:
2052                 case NL80211_IFTYPE_MONITOR:
2053                 case NL80211_IFTYPE_P2P_DEVICE:
2054                         /* nothing to do */
2055                         break;
2056                 case NL80211_IFTYPE_UNSPECIFIED:
2057                 case NUM_NL80211_IFTYPES:
2058                 case NL80211_IFTYPE_P2P_CLIENT:
2059                 case NL80211_IFTYPE_P2P_GO:
2060                 case NL80211_IFTYPE_WDS:
2061                         WARN_ON(1);
2062                         break;
2063                 }
2064         }
2065
2066         ieee80211_recalc_ps(local);
2067
2068         /*
2069          * The sta might be in psm against the ap (e.g. because
2070          * this was the state before a hw restart), so we
2071          * explicitly send a null packet in order to make sure
2072          * it'll sync against the ap (and get out of psm).
2073          */
2074         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2075                 list_for_each_entry(sdata, &local->interfaces, list) {
2076                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2077                                 continue;
2078                         if (!sdata->u.mgd.associated)
2079                                 continue;
2080
2081                         ieee80211_send_nullfunc(local, sdata, false);
2082                 }
2083         }
2084
2085         /* APs are now beaconing, add back stations */
2086         list_for_each_entry(sdata, &local->interfaces, list) {
2087                 if (!ieee80211_sdata_running(sdata))
2088                         continue;
2089
2090                 switch (sdata->vif.type) {
2091                 case NL80211_IFTYPE_AP_VLAN:
2092                 case NL80211_IFTYPE_AP:
2093                         ieee80211_reconfig_stations(sdata);
2094                         break;
2095                 default:
2096                         break;
2097                 }
2098         }
2099
2100         /* add back keys */
2101         list_for_each_entry(sdata, &local->interfaces, list)
2102                 ieee80211_reenable_keys(sdata);
2103
2104         /* re-enable multi-link for client interfaces */
2105         list_for_each_entry(sdata, &local->interfaces, list) {
2106                 if (sdata->restart_active_links)
2107                         ieee80211_set_active_links(&sdata->vif,
2108                                                    sdata->restart_active_links);
2109                 /*
2110                  * If a link switch was scheduled before the restart, and ran
2111                  * before reconfig, it will do nothing, so re-schedule.
2112                  */
2113                 if (sdata->desired_active_links)
2114                         wiphy_work_queue(sdata->local->hw.wiphy,
2115                                          &sdata->activate_links_work);
2116         }
2117
2118         /* Reconfigure sched scan if it was interrupted by FW restart */
2119         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2120                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2121         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2122                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2123         if (sched_scan_sdata && sched_scan_req)
2124                 /*
2125                  * Sched scan stopped, but we don't want to report it. Instead,
2126                  * we're trying to reschedule. However, if more than one scan
2127                  * plan was set, we cannot reschedule since we don't know which
2128                  * scan plan was currently running (and some scan plans may have
2129                  * already finished).
2130                  */
2131                 if (sched_scan_req->n_scan_plans > 1 ||
2132                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2133                                                          sched_scan_req)) {
2134                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2135                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2136                         sched_scan_stopped = true;
2137                 }
2138
2139         if (sched_scan_stopped)
2140                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2141
2142  wake_up:
2143
2144         if (local->monitors == local->open_count && local->monitors > 0)
2145                 ieee80211_add_virtual_monitor(local);
2146
2147         /*
2148          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2149          * sessions can be established after a resume.
2150          *
2151          * Also tear down aggregation sessions since reconfiguring
2152          * them in a hardware restart scenario is not easily done
2153          * right now, and the hardware will have lost information
2154          * about the sessions, but we and the AP still think they
2155          * are active. This is really a workaround though.
2156          */
2157         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2158                 list_for_each_entry(sta, &local->sta_list, list) {
2159                         if (!local->resuming)
2160                                 ieee80211_sta_tear_down_BA_sessions(
2161                                                 sta, AGG_STOP_LOCAL_REQUEST);
2162                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2163                 }
2164         }
2165
2166         /*
2167          * If this is for hw restart things are still running.
2168          * We may want to change that later, however.
2169          */
2170         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2171                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2172
2173         if (local->in_reconfig) {
2174                 in_reconfig = local->in_reconfig;
2175                 local->in_reconfig = false;
2176                 barrier();
2177
2178                 /* Restart deferred ROCs */
2179                 ieee80211_start_next_roc(local);
2180
2181                 /* Requeue all works */
2182                 list_for_each_entry(sdata, &local->interfaces, list)
2183                         wiphy_work_queue(local->hw.wiphy, &sdata->work);
2184         }
2185
2186         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2187                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2188                                         false);
2189
2190         if (in_reconfig) {
2191                 list_for_each_entry(sdata, &local->interfaces, list) {
2192                         if (!ieee80211_sdata_running(sdata))
2193                                 continue;
2194                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2195                                 ieee80211_sta_restart(sdata);
2196                 }
2197         }
2198
2199         if (!suspended)
2200                 return 0;
2201
2202 #ifdef CONFIG_PM
2203         /* first set suspended false, then resuming */
2204         local->suspended = false;
2205         mb();
2206         local->resuming = false;
2207
2208         ieee80211_flush_completed_scan(local, false);
2209
2210         if (local->open_count && !reconfig_due_to_wowlan)
2211                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2212
2213         list_for_each_entry(sdata, &local->interfaces, list) {
2214                 if (!ieee80211_sdata_running(sdata))
2215                         continue;
2216                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2217                         ieee80211_sta_restart(sdata);
2218         }
2219
2220         mod_timer(&local->sta_cleanup, jiffies + 1);
2221 #else
2222         WARN_ON(1);
2223 #endif
2224
2225         return 0;
2226 }
2227
2228 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2229 {
2230         struct ieee80211_sub_if_data *sdata;
2231         struct ieee80211_local *local;
2232         struct ieee80211_key *key;
2233
2234         if (WARN_ON(!vif))
2235                 return;
2236
2237         sdata = vif_to_sdata(vif);
2238         local = sdata->local;
2239
2240         lockdep_assert_wiphy(local->hw.wiphy);
2241
2242         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2243                     !local->resuming))
2244                 return;
2245
2246         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2247                     !local->in_reconfig))
2248                 return;
2249
2250         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2251                 return;
2252
2253         sdata->flags |= flag;
2254
2255         list_for_each_entry(key, &sdata->key_list, list)
2256                 key->flags |= KEY_FLAG_TAINTED;
2257 }
2258
2259 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2260 {
2261         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2262 }
2263 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2264
2265 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2266 {
2267         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2268 }
2269 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2270
2271 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2272                            struct ieee80211_link_data *link)
2273 {
2274         struct ieee80211_local *local = sdata->local;
2275         struct ieee80211_chanctx_conf *chanctx_conf;
2276         struct ieee80211_chanctx *chanctx;
2277
2278         lockdep_assert_wiphy(local->hw.wiphy);
2279
2280         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2281                                                  lockdep_is_held(&local->hw.wiphy->mtx));
2282
2283         /*
2284          * This function can be called from a work, thus it may be possible
2285          * that the chanctx_conf is removed (due to a disconnection, for
2286          * example).
2287          * So nothing should be done in such case.
2288          */
2289         if (!chanctx_conf)
2290                 return;
2291
2292         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2293         ieee80211_recalc_smps_chanctx(local, chanctx);
2294 }
2295
2296 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2297                                   int link_id)
2298 {
2299         struct ieee80211_local *local = sdata->local;
2300         struct ieee80211_chanctx_conf *chanctx_conf;
2301         struct ieee80211_chanctx *chanctx;
2302         int i;
2303
2304         lockdep_assert_wiphy(local->hw.wiphy);
2305
2306         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2307                 struct ieee80211_bss_conf *bss_conf;
2308
2309                 if (link_id >= 0 && link_id != i)
2310                         continue;
2311
2312                 rcu_read_lock();
2313                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2314                 if (!bss_conf) {
2315                         rcu_read_unlock();
2316                         continue;
2317                 }
2318
2319                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2320                                                          lockdep_is_held(&local->hw.wiphy->mtx));
2321                 /*
2322                  * Since we hold the wiphy mutex (checked above)
2323                  * we can take the chanctx_conf pointer out of the
2324                  * RCU critical section, it cannot go away without
2325                  * the mutex. Just the way we reached it could - in
2326                  * theory - go away, but we don't really care and
2327                  * it really shouldn't happen anyway.
2328                  */
2329                 rcu_read_unlock();
2330
2331                 if (!chanctx_conf)
2332                         return;
2333
2334                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2335                                        conf);
2336                 ieee80211_recalc_chanctx_min_def(local, chanctx, NULL);
2337         }
2338 }
2339
2340 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2341 {
2342         size_t pos = offset;
2343
2344         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2345                 pos += 2 + ies[pos + 1];
2346
2347         return pos;
2348 }
2349
2350 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2351                               u16 cap)
2352 {
2353         __le16 tmp;
2354
2355         *pos++ = WLAN_EID_HT_CAPABILITY;
2356         *pos++ = sizeof(struct ieee80211_ht_cap);
2357         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2358
2359         /* capability flags */
2360         tmp = cpu_to_le16(cap);
2361         memcpy(pos, &tmp, sizeof(u16));
2362         pos += sizeof(u16);
2363
2364         /* AMPDU parameters */
2365         *pos++ = ht_cap->ampdu_factor |
2366                  (ht_cap->ampdu_density <<
2367                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2368
2369         /* MCS set */
2370         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2371         pos += sizeof(ht_cap->mcs);
2372
2373         /* extended capabilities */
2374         pos += sizeof(__le16);
2375
2376         /* BF capabilities */
2377         pos += sizeof(__le32);
2378
2379         /* antenna selection */
2380         pos += sizeof(u8);
2381
2382         return pos;
2383 }
2384
2385 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2386                                u32 cap)
2387 {
2388         __le32 tmp;
2389
2390         *pos++ = WLAN_EID_VHT_CAPABILITY;
2391         *pos++ = sizeof(struct ieee80211_vht_cap);
2392         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2393
2394         /* capability flags */
2395         tmp = cpu_to_le32(cap);
2396         memcpy(pos, &tmp, sizeof(u32));
2397         pos += sizeof(u32);
2398
2399         /* VHT MCS set */
2400         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2401         pos += sizeof(vht_cap->vht_mcs);
2402
2403         return pos;
2404 }
2405
2406 /* this may return more than ieee80211_put_he_6ghz_cap() will need */
2407 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
2408 {
2409         const struct ieee80211_sta_he_cap *he_cap;
2410         struct ieee80211_supported_band *sband;
2411         u8 n;
2412
2413         sband = ieee80211_get_sband(sdata);
2414         if (!sband)
2415                 return 0;
2416
2417         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2418         if (!he_cap)
2419                 return 0;
2420
2421         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2422         return 2 + 1 +
2423                sizeof(he_cap->he_cap_elem) + n +
2424                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2425                                      he_cap->he_cap_elem.phy_cap_info);
2426 }
2427
2428 static void
2429 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn,
2430                               const struct ieee80211_sta_he_cap *he_cap,
2431                               struct ieee80211_he_cap_elem *elem)
2432 {
2433         u8 ru_limit, max_ru;
2434
2435         *elem = he_cap->he_cap_elem;
2436
2437         switch (conn->bw_limit) {
2438         case IEEE80211_CONN_BW_LIMIT_20:
2439                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242;
2440                 break;
2441         case IEEE80211_CONN_BW_LIMIT_40:
2442                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484;
2443                 break;
2444         case IEEE80211_CONN_BW_LIMIT_80:
2445                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996;
2446                 break;
2447         default:
2448                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996;
2449                 break;
2450         }
2451
2452         max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2453         max_ru = min(max_ru, ru_limit);
2454         elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2455         elem->phy_cap_info[8] |= max_ru;
2456
2457         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
2458                 elem->phy_cap_info[0] &=
2459                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2460                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2461                 elem->phy_cap_info[9] &=
2462                         ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM;
2463         }
2464
2465         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
2466                 elem->phy_cap_info[0] &=
2467                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2468                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G);
2469                 elem->phy_cap_info[5] &=
2470                         ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
2471                 elem->phy_cap_info[7] &=
2472                         ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ |
2473                           IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ);
2474         }
2475 }
2476
2477 int ieee80211_put_he_cap(struct sk_buff *skb,
2478                          struct ieee80211_sub_if_data *sdata,
2479                          const struct ieee80211_supported_band *sband,
2480                          const struct ieee80211_conn_settings *conn)
2481 {
2482         const struct ieee80211_sta_he_cap *he_cap;
2483         struct ieee80211_he_cap_elem elem;
2484         u8 *len;
2485         u8 n;
2486         u8 ie_len;
2487
2488         if (!conn)
2489                 conn = &ieee80211_conn_settings_unlimited;
2490
2491         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2492         if (!he_cap)
2493                 return 0;
2494
2495         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2496         ieee80211_get_adjusted_he_cap(conn, he_cap, &elem);
2497
2498         n = ieee80211_he_mcs_nss_size(&elem);
2499         ie_len = 2 + 1 +
2500                  sizeof(he_cap->he_cap_elem) + n +
2501                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2502                                        he_cap->he_cap_elem.phy_cap_info);
2503
2504         if (skb_tailroom(skb) < ie_len)
2505                 return -ENOBUFS;
2506
2507         skb_put_u8(skb, WLAN_EID_EXTENSION);
2508         len = skb_put(skb, 1); /* We'll set the size later below */
2509         skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY);
2510
2511         /* Fixed data */
2512         skb_put_data(skb, &elem, sizeof(elem));
2513
2514         skb_put_data(skb, &he_cap->he_mcs_nss_supp, n);
2515
2516         /* Check if PPE Threshold should be present */
2517         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2518              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2519                 goto end;
2520
2521         /*
2522          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2523          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2524          */
2525         n = hweight8(he_cap->ppe_thres[0] &
2526                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2527         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2528                    IEEE80211_PPE_THRES_NSS_POS));
2529
2530         /*
2531          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2532          * total size.
2533          */
2534         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2535         n = DIV_ROUND_UP(n, 8);
2536
2537         /* Copy PPE Thresholds */
2538         skb_put_data(skb, &he_cap->ppe_thres, n);
2539
2540 end:
2541         *len = skb_tail_pointer(skb) - len - 1;
2542         return 0;
2543 }
2544
2545 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb,
2546                               struct ieee80211_sub_if_data *sdata,
2547                               enum ieee80211_smps_mode smps_mode)
2548 {
2549         struct ieee80211_supported_band *sband;
2550         const struct ieee80211_sband_iftype_data *iftd;
2551         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2552         __le16 cap;
2553
2554         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2555                                           BIT(NL80211_BAND_6GHZ),
2556                                           IEEE80211_CHAN_NO_HE))
2557                 return 0;
2558
2559         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2560
2561         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2562         if (!iftd)
2563                 return 0;
2564
2565         /* Check for device HE 6 GHz capability before adding element */
2566         if (!iftd->he_6ghz_capa.capa)
2567                 return 0;
2568
2569         cap = iftd->he_6ghz_capa.capa;
2570         cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS);
2571
2572         switch (smps_mode) {
2573         case IEEE80211_SMPS_AUTOMATIC:
2574         case IEEE80211_SMPS_NUM_MODES:
2575                 WARN_ON(1);
2576                 fallthrough;
2577         case IEEE80211_SMPS_OFF:
2578                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2579                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2580                 break;
2581         case IEEE80211_SMPS_STATIC:
2582                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2583                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2584                 break;
2585         case IEEE80211_SMPS_DYNAMIC:
2586                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2587                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2588                 break;
2589         }
2590
2591         if (skb_tailroom(skb) < 2 + 1 + sizeof(cap))
2592                 return -ENOBUFS;
2593
2594         skb_put_u8(skb, WLAN_EID_EXTENSION);
2595         skb_put_u8(skb, 1 + sizeof(cap));
2596         skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA);
2597         skb_put_data(skb, &cap, sizeof(cap));
2598         return 0;
2599 }
2600
2601 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2602                                const struct cfg80211_chan_def *chandef,
2603                                u16 prot_mode, bool rifs_mode)
2604 {
2605         struct ieee80211_ht_operation *ht_oper;
2606         /* Build HT Information */
2607         *pos++ = WLAN_EID_HT_OPERATION;
2608         *pos++ = sizeof(struct ieee80211_ht_operation);
2609         ht_oper = (struct ieee80211_ht_operation *)pos;
2610         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2611                                         chandef->chan->center_freq);
2612         switch (chandef->width) {
2613         case NL80211_CHAN_WIDTH_160:
2614         case NL80211_CHAN_WIDTH_80P80:
2615         case NL80211_CHAN_WIDTH_80:
2616         case NL80211_CHAN_WIDTH_40:
2617                 if (chandef->center_freq1 > chandef->chan->center_freq)
2618                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2619                 else
2620                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2621                 break;
2622         case NL80211_CHAN_WIDTH_320:
2623                 /* HT information element should not be included on 6GHz */
2624                 WARN_ON(1);
2625                 return pos;
2626         default:
2627                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2628                 break;
2629         }
2630         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2631             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2632             chandef->width != NL80211_CHAN_WIDTH_20)
2633                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2634
2635         if (rifs_mode)
2636                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2637
2638         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2639         ht_oper->stbc_param = 0x0000;
2640
2641         /* It seems that Basic MCS set and Supported MCS set
2642            are identical for the first 10 bytes */
2643         memset(&ht_oper->basic_set, 0, 16);
2644         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2645
2646         return pos + sizeof(struct ieee80211_ht_operation);
2647 }
2648
2649 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2650                                    const struct cfg80211_chan_def *chandef)
2651 {
2652         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2653         *pos++ = 3;                                     /* IE length */
2654         /* New channel width */
2655         switch (chandef->width) {
2656         case NL80211_CHAN_WIDTH_80:
2657                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2658                 break;
2659         case NL80211_CHAN_WIDTH_160:
2660                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2661                 break;
2662         case NL80211_CHAN_WIDTH_80P80:
2663                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2664                 break;
2665         case NL80211_CHAN_WIDTH_320:
2666                 /* The behavior is not defined for 320 MHz channels */
2667                 WARN_ON(1);
2668                 fallthrough;
2669         default:
2670                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2671         }
2672
2673         /* new center frequency segment 0 */
2674         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2675         /* new center frequency segment 1 */
2676         if (chandef->center_freq2)
2677                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2678         else
2679                 *pos++ = 0;
2680 }
2681
2682 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2683                                 const struct cfg80211_chan_def *chandef)
2684 {
2685         struct ieee80211_vht_operation *vht_oper;
2686
2687         *pos++ = WLAN_EID_VHT_OPERATION;
2688         *pos++ = sizeof(struct ieee80211_vht_operation);
2689         vht_oper = (struct ieee80211_vht_operation *)pos;
2690         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2691                                                         chandef->center_freq1);
2692         if (chandef->center_freq2)
2693                 vht_oper->center_freq_seg1_idx =
2694                         ieee80211_frequency_to_channel(chandef->center_freq2);
2695         else
2696                 vht_oper->center_freq_seg1_idx = 0x00;
2697
2698         switch (chandef->width) {
2699         case NL80211_CHAN_WIDTH_160:
2700                 /*
2701                  * Convert 160 MHz channel width to new style as interop
2702                  * workaround.
2703                  */
2704                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2705                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2706                 if (chandef->chan->center_freq < chandef->center_freq1)
2707                         vht_oper->center_freq_seg0_idx -= 8;
2708                 else
2709                         vht_oper->center_freq_seg0_idx += 8;
2710                 break;
2711         case NL80211_CHAN_WIDTH_80P80:
2712                 /*
2713                  * Convert 80+80 MHz channel width to new style as interop
2714                  * workaround.
2715                  */
2716                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2717                 break;
2718         case NL80211_CHAN_WIDTH_80:
2719                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2720                 break;
2721         case NL80211_CHAN_WIDTH_320:
2722                 /* VHT information element should not be included on 6GHz */
2723                 WARN_ON(1);
2724                 return pos;
2725         default:
2726                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2727                 break;
2728         }
2729
2730         /* don't require special VHT peer rates */
2731         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2732
2733         return pos + sizeof(struct ieee80211_vht_operation);
2734 }
2735
2736 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
2737 {
2738         struct ieee80211_he_operation *he_oper;
2739         struct ieee80211_he_6ghz_oper *he_6ghz_op;
2740         u32 he_oper_params;
2741         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
2742
2743         if (chandef->chan->band == NL80211_BAND_6GHZ)
2744                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
2745
2746         *pos++ = WLAN_EID_EXTENSION;
2747         *pos++ = ie_len;
2748         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2749
2750         he_oper_params = 0;
2751         he_oper_params |= u32_encode_bits(1023, /* disabled */
2752                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2753         he_oper_params |= u32_encode_bits(1,
2754                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2755         he_oper_params |= u32_encode_bits(1,
2756                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2757         if (chandef->chan->band == NL80211_BAND_6GHZ)
2758                 he_oper_params |= u32_encode_bits(1,
2759                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
2760
2761         he_oper = (struct ieee80211_he_operation *)pos;
2762         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2763
2764         /* don't require special HE peer rates */
2765         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2766         pos += sizeof(struct ieee80211_he_operation);
2767
2768         if (chandef->chan->band != NL80211_BAND_6GHZ)
2769                 goto out;
2770
2771         /* TODO add VHT operational */
2772         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
2773         he_6ghz_op->minrate = 6; /* 6 Mbps */
2774         he_6ghz_op->primary =
2775                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
2776         he_6ghz_op->ccfs0 =
2777                 ieee80211_frequency_to_channel(chandef->center_freq1);
2778         if (chandef->center_freq2)
2779                 he_6ghz_op->ccfs1 =
2780                         ieee80211_frequency_to_channel(chandef->center_freq2);
2781         else
2782                 he_6ghz_op->ccfs1 = 0;
2783
2784         switch (chandef->width) {
2785         case NL80211_CHAN_WIDTH_320:
2786                 /*
2787                  * TODO: mesh operation is not defined over 6GHz 320 MHz
2788                  * channels.
2789                  */
2790                 WARN_ON(1);
2791                 break;
2792         case NL80211_CHAN_WIDTH_160:
2793                 /* Convert 160 MHz channel width to new style as interop
2794                  * workaround.
2795                  */
2796                 he_6ghz_op->control =
2797                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2798                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
2799                 if (chandef->chan->center_freq < chandef->center_freq1)
2800                         he_6ghz_op->ccfs0 -= 8;
2801                 else
2802                         he_6ghz_op->ccfs0 += 8;
2803                 fallthrough;
2804         case NL80211_CHAN_WIDTH_80P80:
2805                 he_6ghz_op->control =
2806                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2807                 break;
2808         case NL80211_CHAN_WIDTH_80:
2809                 he_6ghz_op->control =
2810                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
2811                 break;
2812         case NL80211_CHAN_WIDTH_40:
2813                 he_6ghz_op->control =
2814                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
2815                 break;
2816         default:
2817                 he_6ghz_op->control =
2818                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
2819                 break;
2820         }
2821
2822         pos += sizeof(struct ieee80211_he_6ghz_oper);
2823
2824 out:
2825         return pos;
2826 }
2827
2828 u8 *ieee80211_ie_build_eht_oper(u8 *pos, struct cfg80211_chan_def *chandef,
2829                                 const struct ieee80211_sta_eht_cap *eht_cap)
2830
2831 {
2832         const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
2833                                         &eht_cap->eht_mcs_nss_supp.only_20mhz;
2834         struct ieee80211_eht_operation *eht_oper;
2835         struct ieee80211_eht_operation_info *eht_oper_info;
2836         u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
2837         u8 eht_oper_info_len =
2838                 offsetof(struct ieee80211_eht_operation_info, optional);
2839         u8 chan_width = 0;
2840
2841         *pos++ = WLAN_EID_EXTENSION;
2842         *pos++ = 1 + eht_oper_len + eht_oper_info_len;
2843         *pos++ = WLAN_EID_EXT_EHT_OPERATION;
2844
2845         eht_oper = (struct ieee80211_eht_operation *)pos;
2846
2847         memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
2848         eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
2849         pos += eht_oper_len;
2850
2851         eht_oper_info =
2852                 (struct ieee80211_eht_operation_info *)eht_oper->optional;
2853
2854         eht_oper_info->ccfs0 =
2855                 ieee80211_frequency_to_channel(chandef->center_freq1);
2856         if (chandef->center_freq2)
2857                 eht_oper_info->ccfs1 =
2858                         ieee80211_frequency_to_channel(chandef->center_freq2);
2859         else
2860                 eht_oper_info->ccfs1 = 0;
2861
2862         switch (chandef->width) {
2863         case NL80211_CHAN_WIDTH_320:
2864                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
2865                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2866                 if (chandef->chan->center_freq < chandef->center_freq1)
2867                         eht_oper_info->ccfs0 -= 16;
2868                 else
2869                         eht_oper_info->ccfs0 += 16;
2870                 break;
2871         case NL80211_CHAN_WIDTH_160:
2872                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2873                 if (chandef->chan->center_freq < chandef->center_freq1)
2874                         eht_oper_info->ccfs0 -= 8;
2875                 else
2876                         eht_oper_info->ccfs0 += 8;
2877                 fallthrough;
2878         case NL80211_CHAN_WIDTH_80P80:
2879                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
2880                 break;
2881         case NL80211_CHAN_WIDTH_80:
2882                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
2883                 break;
2884         case NL80211_CHAN_WIDTH_40:
2885                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
2886                 break;
2887         default:
2888                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
2889                 break;
2890         }
2891         eht_oper_info->control = chan_width;
2892         pos += eht_oper_info_len;
2893
2894         /* TODO: eht_oper_info->optional */
2895
2896         return pos;
2897 }
2898
2899 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2900                                struct cfg80211_chan_def *chandef)
2901 {
2902         enum nl80211_channel_type channel_type;
2903
2904         if (!ht_oper)
2905                 return false;
2906
2907         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2908         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2909                 channel_type = NL80211_CHAN_HT20;
2910                 break;
2911         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2912                 channel_type = NL80211_CHAN_HT40PLUS;
2913                 break;
2914         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2915                 channel_type = NL80211_CHAN_HT40MINUS;
2916                 break;
2917         default:
2918                 return false;
2919         }
2920
2921         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2922         return true;
2923 }
2924
2925 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2926                                 const struct ieee80211_vht_operation *oper,
2927                                 const struct ieee80211_ht_operation *htop,
2928                                 struct cfg80211_chan_def *chandef)
2929 {
2930         struct cfg80211_chan_def new = *chandef;
2931         int cf0, cf1;
2932         int ccfs0, ccfs1, ccfs2;
2933         int ccf0, ccf1;
2934         u32 vht_cap;
2935         bool support_80_80 = false;
2936         bool support_160 = false;
2937         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
2938                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2939         u8 supp_chwidth = u32_get_bits(vht_cap_info,
2940                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2941
2942         if (!oper || !htop)
2943                 return false;
2944
2945         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
2946         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
2947                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
2948         support_80_80 = ((vht_cap &
2949                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
2950                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
2951                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
2952                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
2953                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
2954         ccfs0 = oper->center_freq_seg0_idx;
2955         ccfs1 = oper->center_freq_seg1_idx;
2956         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2957                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2958                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2959
2960         ccf0 = ccfs0;
2961
2962         /* if not supported, parse as though we didn't understand it */
2963         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2964                 ext_nss_bw_supp = 0;
2965
2966         /*
2967          * Cf. IEEE 802.11 Table 9-250
2968          *
2969          * We really just consider that because it's inefficient to connect
2970          * at a higher bandwidth than we'll actually be able to use.
2971          */
2972         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
2973         default:
2974         case 0x00:
2975                 ccf1 = 0;
2976                 support_160 = false;
2977                 support_80_80 = false;
2978                 break;
2979         case 0x01:
2980                 support_80_80 = false;
2981                 fallthrough;
2982         case 0x02:
2983         case 0x03:
2984                 ccf1 = ccfs2;
2985                 break;
2986         case 0x10:
2987                 ccf1 = ccfs1;
2988                 break;
2989         case 0x11:
2990         case 0x12:
2991                 if (!ccfs1)
2992                         ccf1 = ccfs2;
2993                 else
2994                         ccf1 = ccfs1;
2995                 break;
2996         case 0x13:
2997         case 0x20:
2998         case 0x23:
2999                 ccf1 = ccfs1;
3000                 break;
3001         }
3002
3003         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3004         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3005
3006         switch (oper->chan_width) {
3007         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3008                 /* just use HT information directly */
3009                 break;
3010         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3011                 new.width = NL80211_CHAN_WIDTH_80;
3012                 new.center_freq1 = cf0;
3013                 /* If needed, adjust based on the newer interop workaround. */
3014                 if (ccf1) {
3015                         unsigned int diff;
3016
3017                         diff = abs(ccf1 - ccf0);
3018                         if ((diff == 8) && support_160) {
3019                                 new.width = NL80211_CHAN_WIDTH_160;
3020                                 new.center_freq1 = cf1;
3021                         } else if ((diff > 8) && support_80_80) {
3022                                 new.width = NL80211_CHAN_WIDTH_80P80;
3023                                 new.center_freq2 = cf1;
3024                         }
3025                 }
3026                 break;
3027         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3028                 /* deprecated encoding */
3029                 new.width = NL80211_CHAN_WIDTH_160;
3030                 new.center_freq1 = cf0;
3031                 break;
3032         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3033                 /* deprecated encoding */
3034                 new.width = NL80211_CHAN_WIDTH_80P80;
3035                 new.center_freq1 = cf0;
3036                 new.center_freq2 = cf1;
3037                 break;
3038         default:
3039                 return false;
3040         }
3041
3042         if (!cfg80211_chandef_valid(&new))
3043                 return false;
3044
3045         *chandef = new;
3046         return true;
3047 }
3048
3049 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
3050                                 struct cfg80211_chan_def *chandef)
3051 {
3052         chandef->center_freq1 =
3053                 ieee80211_channel_to_frequency(info->ccfs0,
3054                                                chandef->chan->band);
3055
3056         switch (u8_get_bits(info->control,
3057                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3058         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3059                 chandef->width = NL80211_CHAN_WIDTH_20;
3060                 break;
3061         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3062                 chandef->width = NL80211_CHAN_WIDTH_40;
3063                 break;
3064         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3065                 chandef->width = NL80211_CHAN_WIDTH_80;
3066                 break;
3067         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3068                 chandef->width = NL80211_CHAN_WIDTH_160;
3069                 chandef->center_freq1 =
3070                         ieee80211_channel_to_frequency(info->ccfs1,
3071                                                        chandef->chan->band);
3072                 break;
3073         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3074                 chandef->width = NL80211_CHAN_WIDTH_320;
3075                 chandef->center_freq1 =
3076                         ieee80211_channel_to_frequency(info->ccfs1,
3077                                                        chandef->chan->band);
3078                 break;
3079         }
3080 }
3081
3082 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local,
3083                                     const struct ieee80211_he_operation *he_oper,
3084                                     const struct ieee80211_eht_operation *eht_oper,
3085                                     struct cfg80211_chan_def *chandef)
3086 {
3087         struct cfg80211_chan_def he_chandef = *chandef;
3088         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3089         u32 freq;
3090
3091         if (chandef->chan->band != NL80211_BAND_6GHZ)
3092                 return true;
3093
3094         if (!he_oper)
3095                 return false;
3096
3097         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3098         if (!he_6ghz_oper)
3099                 return false;
3100
3101         /*
3102          * The EHT operation IE does not contain the primary channel so the
3103          * primary channel frequency should be taken from the 6 GHz operation
3104          * information.
3105          */
3106         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3107                                               NL80211_BAND_6GHZ);
3108         he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq);
3109
3110         if (!he_chandef.chan)
3111                 return false;
3112
3113         if (!eht_oper ||
3114             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3115                 switch (u8_get_bits(he_6ghz_oper->control,
3116                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3117                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3118                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3119                         break;
3120                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3121                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3122                         break;
3123                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3124                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3125                         break;
3126                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3127                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3128                         if (!he_6ghz_oper->ccfs1)
3129                                 break;
3130                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8)
3131                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3132                         else
3133                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3134                         break;
3135                 }
3136
3137                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3138                         he_chandef.center_freq1 =
3139                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3140                                                                NL80211_BAND_6GHZ);
3141                 } else {
3142                         he_chandef.center_freq1 =
3143                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3144                                                                NL80211_BAND_6GHZ);
3145                         he_chandef.center_freq2 =
3146                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3147                                                                NL80211_BAND_6GHZ);
3148                 }
3149         } else {
3150                 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
3151                                            &he_chandef);
3152                 he_chandef.punctured =
3153                         ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
3154         }
3155
3156         if (!cfg80211_chandef_valid(&he_chandef))
3157                 return false;
3158
3159         *chandef = he_chandef;
3160
3161         return true;
3162 }
3163
3164 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3165                                 struct cfg80211_chan_def *chandef)
3166 {
3167         u32 oper_freq;
3168
3169         if (!oper)
3170                 return false;
3171
3172         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3173         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3174                 chandef->width = NL80211_CHAN_WIDTH_1;
3175                 break;
3176         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3177                 chandef->width = NL80211_CHAN_WIDTH_2;
3178                 break;
3179         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3180                 chandef->width = NL80211_CHAN_WIDTH_4;
3181                 break;
3182         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3183                 chandef->width = NL80211_CHAN_WIDTH_8;
3184                 break;
3185         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3186                 chandef->width = NL80211_CHAN_WIDTH_16;
3187                 break;
3188         default:
3189                 return false;
3190         }
3191
3192         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3193                                                   NL80211_BAND_S1GHZ);
3194         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3195         chandef->freq1_offset = oper_freq % 1000;
3196
3197         return true;
3198 }
3199
3200 int ieee80211_put_srates_elem(struct sk_buff *skb,
3201                               const struct ieee80211_supported_band *sband,
3202                               u32 basic_rates, u32 rate_flags, u32 masked_rates,
3203                               u8 element_id)
3204 {
3205         u8 i, rates, skip;
3206
3207         rates = 0;
3208         for (i = 0; i < sband->n_bitrates; i++) {
3209                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3210                         continue;
3211                 if (masked_rates & BIT(i))
3212                         continue;
3213                 rates++;
3214         }
3215
3216         if (element_id == WLAN_EID_SUPP_RATES) {
3217                 rates = min_t(u8, rates, 8);
3218                 skip = 0;
3219         } else {
3220                 skip = 8;
3221                 if (rates <= skip)
3222                         return 0;
3223                 rates -= skip;
3224         }
3225
3226         if (skb_tailroom(skb) < rates + 2)
3227                 return -ENOBUFS;
3228
3229         skb_put_u8(skb, element_id);
3230         skb_put_u8(skb, rates);
3231
3232         for (i = 0; i < sband->n_bitrates && rates; i++) {
3233                 int rate;
3234                 u8 basic;
3235
3236                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3237                         continue;
3238                 if (masked_rates & BIT(i))
3239                         continue;
3240
3241                 if (skip > 0) {
3242                         skip--;
3243                         continue;
3244                 }
3245
3246                 basic = basic_rates & BIT(i) ? 0x80 : 0;
3247
3248                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
3249                 skb_put_u8(skb, basic | (u8)rate);
3250                 rates--;
3251         }
3252
3253         WARN(rates > 0, "rates confused: rates:%d, element:%d\n",
3254              rates, element_id);
3255
3256         return 0;
3257 }
3258
3259 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3260 {
3261         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3262
3263         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3264                 return 0;
3265
3266         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3267 }
3268 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3269
3270 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3271 {
3272         if (!mcs)
3273                 return 1;
3274
3275         /* TODO: consider rx_highest */
3276
3277         if (mcs->rx_mask[3])
3278                 return 4;
3279         if (mcs->rx_mask[2])
3280                 return 3;
3281         if (mcs->rx_mask[1])
3282                 return 2;
3283         return 1;
3284 }
3285
3286 /**
3287  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3288  * @local: mac80211 hw info struct
3289  * @status: RX status
3290  * @mpdu_len: total MPDU length (including FCS)
3291  * @mpdu_offset: offset into MPDU to calculate timestamp at
3292  *
3293  * This function calculates the RX timestamp at the given MPDU offset, taking
3294  * into account what the RX timestamp was. An offset of 0 will just normalize
3295  * the timestamp to TSF at beginning of MPDU reception.
3296  *
3297  * Returns: the calculated timestamp
3298  */
3299 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3300                                      struct ieee80211_rx_status *status,
3301                                      unsigned int mpdu_len,
3302                                      unsigned int mpdu_offset)
3303 {
3304         u64 ts = status->mactime;
3305         bool mactime_plcp_start;
3306         struct rate_info ri;
3307         u16 rate;
3308         u8 n_ltf;
3309
3310         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3311                 return 0;
3312
3313         mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
3314                                 RX_FLAG_MACTIME_PLCP_START;
3315
3316         memset(&ri, 0, sizeof(ri));
3317
3318         ri.bw = status->bw;
3319
3320         /* Fill cfg80211 rate info */
3321         switch (status->encoding) {
3322         case RX_ENC_EHT:
3323                 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
3324                 ri.mcs = status->rate_idx;
3325                 ri.nss = status->nss;
3326                 ri.eht_ru_alloc = status->eht.ru;
3327                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3328                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3329                 /* TODO/FIXME: is this right? handle other PPDUs */
3330                 if (mactime_plcp_start) {
3331                         mpdu_offset += 2;
3332                         ts += 36;
3333                 }
3334                 break;
3335         case RX_ENC_HE:
3336                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3337                 ri.mcs = status->rate_idx;
3338                 ri.nss = status->nss;
3339                 ri.he_ru_alloc = status->he_ru;
3340                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3341                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3342
3343                 /*
3344                  * See P802.11ax_D6.0, section 27.3.4 for
3345                  * VHT PPDU format.
3346                  */
3347                 if (mactime_plcp_start) {
3348                         mpdu_offset += 2;
3349                         ts += 36;
3350
3351                         /*
3352                          * TODO:
3353                          * For HE MU PPDU, add the HE-SIG-B.
3354                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3355                          * For HE TB PPDU, add 4us for the HE-STF.
3356                          * Add the HE-LTF durations - variable.
3357                          */
3358                 }
3359
3360                 break;
3361         case RX_ENC_HT:
3362                 ri.mcs = status->rate_idx;
3363                 ri.flags |= RATE_INFO_FLAGS_MCS;
3364                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3365                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3366
3367                 /*
3368                  * See P802.11REVmd_D3.0, section 19.3.2 for
3369                  * HT PPDU format.
3370                  */
3371                 if (mactime_plcp_start) {
3372                         mpdu_offset += 2;
3373                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3374                                 ts += 24;
3375                         else
3376                                 ts += 32;
3377
3378                         /*
3379                          * Add Data HT-LTFs per streams
3380                          * TODO: add Extension HT-LTFs, 4us per LTF
3381                          */
3382                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3383                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3384                         ts += n_ltf * 4;
3385                 }
3386
3387                 break;
3388         case RX_ENC_VHT:
3389                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3390                 ri.mcs = status->rate_idx;
3391                 ri.nss = status->nss;
3392                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3393                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3394
3395                 /*
3396                  * See P802.11REVmd_D3.0, section 21.3.2 for
3397                  * VHT PPDU format.
3398                  */
3399                 if (mactime_plcp_start) {
3400                         mpdu_offset += 2;
3401                         ts += 36;
3402
3403                         /*
3404                          * Add VHT-LTFs per streams
3405                          */
3406                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3407                                 ri.nss + 1 : ri.nss;
3408                         ts += 4 * n_ltf;
3409                 }
3410
3411                 break;
3412         default:
3413                 WARN_ON(1);
3414                 fallthrough;
3415         case RX_ENC_LEGACY: {
3416                 struct ieee80211_supported_band *sband;
3417
3418                 sband = local->hw.wiphy->bands[status->band];
3419                 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
3420
3421                 if (mactime_plcp_start) {
3422                         if (status->band == NL80211_BAND_5GHZ) {
3423                                 ts += 20;
3424                                 mpdu_offset += 2;
3425                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3426                                 ts += 96;
3427                         } else {
3428                                 ts += 192;
3429                         }
3430                 }
3431                 break;
3432                 }
3433         }
3434
3435         rate = cfg80211_calculate_bitrate(&ri);
3436         if (WARN_ONCE(!rate,
3437                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3438                       (unsigned long long)status->flag, status->rate_idx,
3439                       status->nss))
3440                 return 0;
3441
3442         /* rewind from end of MPDU */
3443         if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
3444                 ts -= mpdu_len * 8 * 10 / rate;
3445
3446         ts += mpdu_offset * 8 * 10 / rate;
3447
3448         return ts;
3449 }
3450
3451 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3452 {
3453         struct ieee80211_sub_if_data *sdata;
3454         struct cfg80211_chan_def chandef;
3455
3456         lockdep_assert_wiphy(local->hw.wiphy);
3457
3458         list_for_each_entry(sdata, &local->interfaces, list) {
3459                 /* it might be waiting for the local->mtx, but then
3460                  * by the time it gets it, sdata->wdev.cac_started
3461                  * will no longer be true
3462                  */
3463                 wiphy_delayed_work_cancel(local->hw.wiphy,
3464                                           &sdata->deflink.dfs_cac_timer_work);
3465
3466                 if (sdata->wdev.cac_started) {
3467                         chandef = sdata->vif.bss_conf.chanreq.oper;
3468                         ieee80211_link_release_channel(&sdata->deflink);
3469                         cfg80211_cac_event(sdata->dev,
3470                                            &chandef,
3471                                            NL80211_RADAR_CAC_ABORTED,
3472                                            GFP_KERNEL);
3473                 }
3474         }
3475 }
3476
3477 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
3478                                        struct wiphy_work *work)
3479 {
3480         struct ieee80211_local *local =
3481                 container_of(work, struct ieee80211_local, radar_detected_work);
3482         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3483         struct ieee80211_chanctx *ctx;
3484         int num_chanctx = 0;
3485
3486         lockdep_assert_wiphy(local->hw.wiphy);
3487
3488         list_for_each_entry(ctx, &local->chanctx_list, list) {
3489                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3490                         continue;
3491
3492                 num_chanctx++;
3493                 chandef = ctx->conf.def;
3494         }
3495
3496         ieee80211_dfs_cac_cancel(local);
3497
3498         if (num_chanctx > 1)
3499                 /* XXX: multi-channel is not supported yet */
3500                 WARN_ON(1);
3501         else
3502                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3503 }
3504
3505 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3506 {
3507         struct ieee80211_local *local = hw_to_local(hw);
3508
3509         trace_api_radar_detected(local);
3510
3511         wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
3512 }
3513 EXPORT_SYMBOL(ieee80211_radar_detected);
3514
3515 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
3516                                  struct ieee80211_conn_settings *conn)
3517 {
3518         enum nl80211_chan_width new_primary_width;
3519         struct ieee80211_conn_settings _ignored = {};
3520
3521         /* allow passing NULL if caller doesn't care */
3522         if (!conn)
3523                 conn = &_ignored;
3524
3525 again:
3526         /* no-HT indicates nothing to do */
3527         new_primary_width = NL80211_CHAN_WIDTH_20_NOHT;
3528
3529         switch (c->width) {
3530         default:
3531         case NL80211_CHAN_WIDTH_20_NOHT:
3532                 WARN_ON_ONCE(1);
3533                 fallthrough;
3534         case NL80211_CHAN_WIDTH_20:
3535                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3536                 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3537                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3538                 c->punctured = 0;
3539                 break;
3540         case NL80211_CHAN_WIDTH_40:
3541                 c->width = NL80211_CHAN_WIDTH_20;
3542                 c->center_freq1 = c->chan->center_freq;
3543                 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3544                         conn->mode = IEEE80211_CONN_MODE_HT;
3545                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3546                 c->punctured = 0;
3547                 break;
3548         case NL80211_CHAN_WIDTH_80:
3549                 new_primary_width = NL80211_CHAN_WIDTH_40;
3550                 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3551                         conn->mode = IEEE80211_CONN_MODE_HT;
3552                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40;
3553                 break;
3554         case NL80211_CHAN_WIDTH_80P80:
3555                 c->center_freq2 = 0;
3556                 c->width = NL80211_CHAN_WIDTH_80;
3557                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3558                 break;
3559         case NL80211_CHAN_WIDTH_160:
3560                 new_primary_width = NL80211_CHAN_WIDTH_80;
3561                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3562                 break;
3563         case NL80211_CHAN_WIDTH_320:
3564                 new_primary_width = NL80211_CHAN_WIDTH_160;
3565                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
3566                 break;
3567         case NL80211_CHAN_WIDTH_1:
3568         case NL80211_CHAN_WIDTH_2:
3569         case NL80211_CHAN_WIDTH_4:
3570         case NL80211_CHAN_WIDTH_8:
3571         case NL80211_CHAN_WIDTH_16:
3572                 WARN_ON_ONCE(1);
3573                 /* keep c->width */
3574                 conn->mode = IEEE80211_CONN_MODE_S1G;
3575                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3576                 break;
3577         case NL80211_CHAN_WIDTH_5:
3578         case NL80211_CHAN_WIDTH_10:
3579                 WARN_ON_ONCE(1);
3580                 /* keep c->width */
3581                 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3582                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3583                 break;
3584         }
3585
3586         if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) {
3587                 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width,
3588                                                            &c->punctured);
3589                 c->width = new_primary_width;
3590         }
3591
3592         /*
3593          * With an 80 MHz channel, we might have the puncturing in the primary
3594          * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.
3595          * In that case, downgrade again.
3596          */
3597         if (!cfg80211_chandef_valid(c) && c->punctured)
3598                 goto again;
3599
3600         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3601 }
3602
3603 /*
3604  * Returns true if smps_mode_new is strictly more restrictive than
3605  * smps_mode_old.
3606  */
3607 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3608                                    enum ieee80211_smps_mode smps_mode_new)
3609 {
3610         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3611                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3612                 return false;
3613
3614         switch (smps_mode_old) {
3615         case IEEE80211_SMPS_STATIC:
3616                 return false;
3617         case IEEE80211_SMPS_DYNAMIC:
3618                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3619         case IEEE80211_SMPS_OFF:
3620                 return smps_mode_new != IEEE80211_SMPS_OFF;
3621         default:
3622                 WARN_ON(1);
3623         }
3624
3625         return false;
3626 }
3627
3628 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3629                               struct cfg80211_csa_settings *csa_settings)
3630 {
3631         struct sk_buff *skb;
3632         struct ieee80211_mgmt *mgmt;
3633         struct ieee80211_local *local = sdata->local;
3634         int freq;
3635         int hdr_len = offsetofend(struct ieee80211_mgmt,
3636                                   u.action.u.chan_switch);
3637         u8 *pos;
3638
3639         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3640             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3641                 return -EOPNOTSUPP;
3642
3643         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3644                             5 + /* channel switch announcement element */
3645                             3 + /* secondary channel offset element */
3646                             5 + /* wide bandwidth channel switch announcement */
3647                             8); /* mesh channel switch parameters element */
3648         if (!skb)
3649                 return -ENOMEM;
3650
3651         skb_reserve(skb, local->tx_headroom);
3652         mgmt = skb_put_zero(skb, hdr_len);
3653         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3654                                           IEEE80211_STYPE_ACTION);
3655
3656         eth_broadcast_addr(mgmt->da);
3657         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3658         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3659                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3660         } else {
3661                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3662                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3663         }
3664         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3665         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3666         pos = skb_put(skb, 5);
3667         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3668         *pos++ = 3;                                             /* IE length */
3669         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3670         freq = csa_settings->chandef.chan->center_freq;
3671         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3672         *pos++ = csa_settings->count;                           /* count */
3673
3674         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3675                 enum nl80211_channel_type ch_type;
3676
3677                 skb_put(skb, 3);
3678                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3679                 *pos++ = 1;                                     /* IE length */
3680                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3681                 if (ch_type == NL80211_CHAN_HT40PLUS)
3682                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3683                 else
3684                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3685         }
3686
3687         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3688                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3689
3690                 skb_put(skb, 8);
3691                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3692                 *pos++ = 6;                                     /* IE length */
3693                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3694                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3695                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3696                 *pos++ |= csa_settings->block_tx ?
3697                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3698                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3699                 pos += 2;
3700                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3701                 pos += 2;
3702         }
3703
3704         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3705             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3706             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3707                 skb_put(skb, 5);
3708                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3709         }
3710
3711         ieee80211_tx_skb(sdata, skb);
3712         return 0;
3713 }
3714
3715 static bool
3716 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3717 {
3718         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3719         int skip;
3720
3721         if (end > 0)
3722                 return false;
3723
3724         /* One shot NOA  */
3725         if (data->count[i] == 1)
3726                 return false;
3727
3728         if (data->desc[i].interval == 0)
3729                 return false;
3730
3731         /* End time is in the past, check for repetitions */
3732         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3733         if (data->count[i] < 255) {
3734                 if (data->count[i] <= skip) {
3735                         data->count[i] = 0;
3736                         return false;
3737                 }
3738
3739                 data->count[i] -= skip;
3740         }
3741
3742         data->desc[i].start += skip * data->desc[i].interval;
3743
3744         return true;
3745 }
3746
3747 static bool
3748 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3749                              s32 *offset)
3750 {
3751         bool ret = false;
3752         int i;
3753
3754         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3755                 s32 cur;
3756
3757                 if (!data->count[i])
3758                         continue;
3759
3760                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3761                         ret = true;
3762
3763                 cur = data->desc[i].start - tsf;
3764                 if (cur > *offset)
3765                         continue;
3766
3767                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3768                 if (cur > *offset)
3769                         *offset = cur;
3770         }
3771
3772         return ret;
3773 }
3774
3775 static u32
3776 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3777 {
3778         s32 offset = 0;
3779         int tries = 0;
3780         /*
3781          * arbitrary limit, used to avoid infinite loops when combined NoA
3782          * descriptors cover the full time period.
3783          */
3784         int max_tries = 5;
3785
3786         ieee80211_extend_absent_time(data, tsf, &offset);
3787         do {
3788                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3789                         break;
3790
3791                 tries++;
3792         } while (tries < max_tries);
3793
3794         return offset;
3795 }
3796
3797 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3798 {
3799         u32 next_offset = BIT(31) - 1;
3800         int i;
3801
3802         data->absent = 0;
3803         data->has_next_tsf = false;
3804         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3805                 s32 start;
3806
3807                 if (!data->count[i])
3808                         continue;
3809
3810                 ieee80211_extend_noa_desc(data, tsf, i);
3811                 start = data->desc[i].start - tsf;
3812                 if (start <= 0)
3813                         data->absent |= BIT(i);
3814
3815                 if (next_offset > start)
3816                         next_offset = start;
3817
3818                 data->has_next_tsf = true;
3819         }
3820
3821         if (data->absent)
3822                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3823
3824         data->next_tsf = tsf + next_offset;
3825 }
3826 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3827
3828 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3829                             struct ieee80211_noa_data *data, u32 tsf)
3830 {
3831         int ret = 0;
3832         int i;
3833
3834         memset(data, 0, sizeof(*data));
3835
3836         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3837                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3838
3839                 if (!desc->count || !desc->duration)
3840                         continue;
3841
3842                 data->count[i] = desc->count;
3843                 data->desc[i].start = le32_to_cpu(desc->start_time);
3844                 data->desc[i].duration = le32_to_cpu(desc->duration);
3845                 data->desc[i].interval = le32_to_cpu(desc->interval);
3846
3847                 if (data->count[i] > 1 &&
3848                     data->desc[i].interval < data->desc[i].duration)
3849                         continue;
3850
3851                 ieee80211_extend_noa_desc(data, tsf, i);
3852                 ret++;
3853         }
3854
3855         if (ret)
3856                 ieee80211_update_p2p_noa(data, tsf);
3857
3858         return ret;
3859 }
3860 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3861
3862 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3863                            struct ieee80211_sub_if_data *sdata)
3864 {
3865         u64 tsf = drv_get_tsf(local, sdata);
3866         u64 dtim_count = 0;
3867         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3868         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3869         struct ps_data *ps;
3870         u8 bcns_from_dtim;
3871
3872         if (tsf == -1ULL || !beacon_int || !dtim_period)
3873                 return;
3874
3875         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3876             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3877                 if (!sdata->bss)
3878                         return;
3879
3880                 ps = &sdata->bss->ps;
3881         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3882                 ps = &sdata->u.mesh.ps;
3883         } else {
3884                 return;
3885         }
3886
3887         /*
3888          * actually finds last dtim_count, mac80211 will update in
3889          * __beacon_add_tim().
3890          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3891          */
3892         do_div(tsf, beacon_int);
3893         bcns_from_dtim = do_div(tsf, dtim_period);
3894         /* just had a DTIM */
3895         if (!bcns_from_dtim)
3896                 dtim_count = 0;
3897         else
3898                 dtim_count = dtim_period - bcns_from_dtim;
3899
3900         ps->dtim_count = dtim_count;
3901 }
3902
3903 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3904                                          struct ieee80211_chanctx *ctx)
3905 {
3906         struct ieee80211_link_data *link;
3907         u8 radar_detect = 0;
3908
3909         lockdep_assert_wiphy(local->hw.wiphy);
3910
3911         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3912                 return 0;
3913
3914         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
3915                 if (link->reserved_radar_required)
3916                         radar_detect |= BIT(link->reserved.oper.width);
3917
3918         /*
3919          * An in-place reservation context should not have any assigned vifs
3920          * until it replaces the other context.
3921          */
3922         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3923                 !list_empty(&ctx->assigned_links));
3924
3925         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
3926                 if (!link->radar_required)
3927                         continue;
3928
3929                 radar_detect |=
3930                         BIT(link->conf->chanreq.oper.width);
3931         }
3932
3933         return radar_detect;
3934 }
3935
3936 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3937                                  const struct cfg80211_chan_def *chandef,
3938                                  enum ieee80211_chanctx_mode chanmode,
3939                                  u8 radar_detect)
3940 {
3941         struct ieee80211_local *local = sdata->local;
3942         struct ieee80211_sub_if_data *sdata_iter;
3943         enum nl80211_iftype iftype = sdata->wdev.iftype;
3944         struct ieee80211_chanctx *ctx;
3945         int total = 1;
3946         struct iface_combination_params params = {
3947                 .radar_detect = radar_detect,
3948         };
3949
3950         lockdep_assert_wiphy(local->hw.wiphy);
3951
3952         if (WARN_ON(hweight32(radar_detect) > 1))
3953                 return -EINVAL;
3954
3955         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3956                     !chandef->chan))
3957                 return -EINVAL;
3958
3959         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3960                 return -EINVAL;
3961
3962         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3963             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3964                 /*
3965                  * always passing this is harmless, since it'll be the
3966                  * same value that cfg80211 finds if it finds the same
3967                  * interface ... and that's always allowed
3968                  */
3969                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3970         }
3971
3972         /* Always allow software iftypes */
3973         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3974                 if (radar_detect)
3975                         return -EINVAL;
3976                 return 0;
3977         }
3978
3979         if (chandef)
3980                 params.num_different_channels = 1;
3981
3982         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3983                 params.iftype_num[iftype] = 1;
3984
3985         list_for_each_entry(ctx, &local->chanctx_list, list) {
3986                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3987                         continue;
3988                 params.radar_detect |=
3989                         ieee80211_chanctx_radar_detect(local, ctx);
3990                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3991                         params.num_different_channels++;
3992                         continue;
3993                 }
3994                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3995                     cfg80211_chandef_compatible(chandef,
3996                                                 &ctx->conf.def))
3997                         continue;
3998                 params.num_different_channels++;
3999         }
4000
4001         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4002                 struct wireless_dev *wdev_iter;
4003
4004                 wdev_iter = &sdata_iter->wdev;
4005
4006                 if (sdata_iter == sdata ||
4007                     !ieee80211_sdata_running(sdata_iter) ||
4008                     cfg80211_iftype_allowed(local->hw.wiphy,
4009                                             wdev_iter->iftype, 0, 1))
4010                         continue;
4011
4012                 params.iftype_num[wdev_iter->iftype]++;
4013                 total++;
4014         }
4015
4016         if (total == 1 && !params.radar_detect)
4017                 return 0;
4018
4019         return cfg80211_check_combinations(local->hw.wiphy, &params);
4020 }
4021
4022 static void
4023 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4024                          void *data)
4025 {
4026         u32 *max_num_different_channels = data;
4027
4028         *max_num_different_channels = max(*max_num_different_channels,
4029                                           c->num_different_channels);
4030 }
4031
4032 int ieee80211_max_num_channels(struct ieee80211_local *local)
4033 {
4034         struct ieee80211_sub_if_data *sdata;
4035         struct ieee80211_chanctx *ctx;
4036         u32 max_num_different_channels = 1;
4037         int err;
4038         struct iface_combination_params params = {0};
4039
4040         lockdep_assert_wiphy(local->hw.wiphy);
4041
4042         list_for_each_entry(ctx, &local->chanctx_list, list) {
4043                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4044                         continue;
4045
4046                 params.num_different_channels++;
4047
4048                 params.radar_detect |=
4049                         ieee80211_chanctx_radar_detect(local, ctx);
4050         }
4051
4052         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4053                 params.iftype_num[sdata->wdev.iftype]++;
4054
4055         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4056                                          ieee80211_iter_max_chans,
4057                                          &max_num_different_channels);
4058         if (err < 0)
4059                 return err;
4060
4061         return max_num_different_channels;
4062 }
4063
4064 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4065                                 struct ieee80211_sta_s1g_cap *caps,
4066                                 struct sk_buff *skb)
4067 {
4068         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4069         struct ieee80211_s1g_cap s1g_capab;
4070         u8 *pos;
4071         int i;
4072
4073         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4074                 return;
4075
4076         if (!caps->s1g)
4077                 return;
4078
4079         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4080         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4081
4082         /* override the capability info */
4083         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4084                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4085
4086                 s1g_capab.capab_info[i] &= ~mask;
4087                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4088         }
4089
4090         /* then MCS and NSS set */
4091         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4092                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4093
4094                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4095                 s1g_capab.supp_mcs_nss[i] |=
4096                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4097         }
4098
4099         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4100         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4101         *pos++ = sizeof(s1g_capab);
4102
4103         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4104 }
4105
4106 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4107                                   struct sk_buff *skb)
4108 {
4109         u8 *pos = skb_put(skb, 3);
4110
4111         *pos++ = WLAN_EID_AID_REQUEST;
4112         *pos++ = 1;
4113         *pos++ = 0;
4114 }
4115
4116 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4117 {
4118         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4119         *buf++ = 7; /* len */
4120         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4121         *buf++ = 0x50;
4122         *buf++ = 0xf2;
4123         *buf++ = 2; /* WME */
4124         *buf++ = 0; /* WME info */
4125         *buf++ = 1; /* WME ver */
4126         *buf++ = qosinfo; /* U-APSD no in use */
4127
4128         return buf;
4129 }
4130
4131 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4132                              unsigned long *frame_cnt,
4133                              unsigned long *byte_cnt)
4134 {
4135         struct txq_info *txqi = to_txq_info(txq);
4136         u32 frag_cnt = 0, frag_bytes = 0;
4137         struct sk_buff *skb;
4138
4139         skb_queue_walk(&txqi->frags, skb) {
4140                 frag_cnt++;
4141                 frag_bytes += skb->len;
4142         }
4143
4144         if (frame_cnt)
4145                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4146
4147         if (byte_cnt)
4148                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4149 }
4150 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4151
4152 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4153         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4154         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4155         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4156         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4157 };
4158
4159 u16 ieee80211_encode_usf(int listen_interval)
4160 {
4161         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4162         u16 ui, usf = 0;
4163
4164         /* find greatest USF */
4165         while (usf < IEEE80211_MAX_USF) {
4166                 if (listen_interval % listen_int_usf[usf + 1])
4167                         break;
4168                 usf += 1;
4169         }
4170         ui = listen_interval / listen_int_usf[usf];
4171
4172         /* error if there is a remainder. Should've been checked by user */
4173         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4174         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4175                           FIELD_PREP(LISTEN_INT_UI, ui);
4176
4177         return (u16) listen_interval;
4178 }
4179
4180 /* this may return more than ieee80211_put_eht_cap() will need */
4181 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
4182 {
4183         const struct ieee80211_sta_he_cap *he_cap;
4184         const struct ieee80211_sta_eht_cap *eht_cap;
4185         struct ieee80211_supported_band *sband;
4186         bool is_ap;
4187         u8 n;
4188
4189         sband = ieee80211_get_sband(sdata);
4190         if (!sband)
4191                 return 0;
4192
4193         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4194         eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4195         if (!he_cap || !eht_cap)
4196                 return 0;
4197
4198         is_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4199
4200         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4201                                        &eht_cap->eht_cap_elem,
4202                                        is_ap);
4203         return 2 + 1 +
4204                sizeof(eht_cap->eht_cap_elem) + n +
4205                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4206                                       eht_cap->eht_cap_elem.phy_cap_info);
4207         return 0;
4208 }
4209
4210 int ieee80211_put_eht_cap(struct sk_buff *skb,
4211                           struct ieee80211_sub_if_data *sdata,
4212                           const struct ieee80211_supported_band *sband,
4213                           const struct ieee80211_conn_settings *conn)
4214 {
4215         const struct ieee80211_sta_he_cap *he_cap =
4216                 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4217         const struct ieee80211_sta_eht_cap *eht_cap =
4218                 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4219         bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4220         struct ieee80211_eht_cap_elem_fixed fixed;
4221         struct ieee80211_he_cap_elem he;
4222         u8 mcs_nss_len, ppet_len;
4223         u8 orig_mcs_nss_len;
4224         u8 ie_len;
4225
4226         if (!conn)
4227                 conn = &ieee80211_conn_settings_unlimited;
4228
4229         /* Make sure we have place for the IE */
4230         if (!he_cap || !eht_cap)
4231                 return 0;
4232
4233         orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4234                                                       &eht_cap->eht_cap_elem,
4235                                                       for_ap);
4236
4237         ieee80211_get_adjusted_he_cap(conn, he_cap, &he);
4238
4239         fixed = eht_cap->eht_cap_elem;
4240
4241         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80)
4242                 fixed.phy_cap_info[6] &=
4243                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ;
4244
4245         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
4246                 fixed.phy_cap_info[1] &=
4247                         ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK;
4248                 fixed.phy_cap_info[2] &=
4249                         ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK;
4250                 fixed.phy_cap_info[6] &=
4251                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ;
4252         }
4253
4254         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) {
4255                 fixed.phy_cap_info[0] &=
4256                         ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
4257                 fixed.phy_cap_info[1] &=
4258                         ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK;
4259                 fixed.phy_cap_info[2] &=
4260                         ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK;
4261                 fixed.phy_cap_info[6] &=
4262                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ;
4263         }
4264
4265         if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20)
4266                 fixed.phy_cap_info[0] &=
4267                         ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ;
4268
4269         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap);
4270         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4271                                           fixed.phy_cap_info);
4272
4273         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4274         if (skb_tailroom(skb) < ie_len)
4275                 return -ENOBUFS;
4276
4277         skb_put_u8(skb, WLAN_EID_EXTENSION);
4278         skb_put_u8(skb, ie_len - 2);
4279         skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY);
4280         skb_put_data(skb, &fixed, sizeof(fixed));
4281
4282         if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) {
4283                 /*
4284                  * If the (non-AP) STA became 20 MHz only, then convert from
4285                  * <=80 to 20-MHz-only format, where MCSes are indicated in
4286                  * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9,
4287                  * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9.
4288                  */
4289                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4290                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4291                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss);
4292                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss);
4293         } else {
4294                 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4295         }
4296
4297         if (ppet_len)
4298                 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len);
4299
4300         return 0;
4301 }
4302
4303 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)
4304 {
4305         static const char * const modes[] = {
4306                 [IEEE80211_CONN_MODE_S1G] = "S1G",
4307                 [IEEE80211_CONN_MODE_LEGACY] = "legacy",
4308                 [IEEE80211_CONN_MODE_HT] = "HT",
4309                 [IEEE80211_CONN_MODE_VHT] = "VHT",
4310                 [IEEE80211_CONN_MODE_HE] = "HE",
4311                 [IEEE80211_CONN_MODE_EHT] = "EHT",
4312         };
4313
4314         if (WARN_ON(mode >= ARRAY_SIZE(modes)))
4315                 return "<out of range>";
4316
4317         return modes[mode] ?: "<missing string>";
4318 }
4319
4320 enum ieee80211_conn_bw_limit
4321 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef)
4322 {
4323         switch (chandef->width) {
4324         case NL80211_CHAN_WIDTH_20_NOHT:
4325         case NL80211_CHAN_WIDTH_20:
4326                 return IEEE80211_CONN_BW_LIMIT_20;
4327         case NL80211_CHAN_WIDTH_40:
4328                 return IEEE80211_CONN_BW_LIMIT_40;
4329         case NL80211_CHAN_WIDTH_80:
4330                 return IEEE80211_CONN_BW_LIMIT_80;
4331         case NL80211_CHAN_WIDTH_80P80:
4332         case NL80211_CHAN_WIDTH_160:
4333                 return IEEE80211_CONN_BW_LIMIT_160;
4334         case NL80211_CHAN_WIDTH_320:
4335                 return IEEE80211_CONN_BW_LIMIT_320;
4336         default:
4337                 WARN(1, "unhandled chandef width %d\n", chandef->width);
4338                 return IEEE80211_CONN_BW_LIMIT_20;
4339         }
4340 }