net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2022 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  49                         enum nl80211_iftype type)
  50 {
  51         __le16 fc = hdr->frame_control;
  52
  53         if (ieee80211_is_data(fc)) {
  54                 if (len < 24) /* drop incorrect hdr len (data) */
  55                         return NULL;
  56
  57                 if (ieee80211_has_a4(fc))
  58                         return NULL;
  59                 if (ieee80211_has_tods(fc))
  60                         return hdr->addr1;
  61                 if (ieee80211_has_fromds(fc))
  62                         return hdr->addr2;
  63
  64                 return hdr->addr3;
  65         }
  66
  67         if (ieee80211_is_s1g_beacon(fc)) {
  68                 struct ieee80211_ext *ext = (void *) hdr;
  69
  70                 return ext->u.s1g_beacon.sa;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98 EXPORT_SYMBOL(ieee80211_get_bssid);
  99
 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 101 {
 102         struct sk_buff *skb;
 103         struct ieee80211_hdr *hdr;
 104
 105         skb_queue_walk(&tx->skbs, skb) {
 106                 hdr = (struct ieee80211_hdr *) skb->data;
 107                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 108         }
 109 }
 110
 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 112                              int rate, int erp, int short_preamble,
 113                              int shift)
 114 {
 115         int dur;
 116
 117         /* calculate duration (in microseconds, rounded up to next higher
 118          * integer if it includes a fractional microsecond) to send frame of
 119          * len bytes (does not include FCS) at the given rate. Duration will
 120          * also include SIFS.
 121          *
 122          * rate is in 100 kbps, so divident is multiplied by 10 in the
 123          * DIV_ROUND_UP() operations.
 124          *
 125          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 126          * is assumed to be 0 otherwise.
 127          */
 128
 129         if (band == NL80211_BAND_5GHZ || erp) {
 130                 /*
 131                  * OFDM:
 132                  *
 133                  * N_DBPS = DATARATE x 4
 134                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 135                  *      (16 = SIGNAL time, 6 = tail bits)
 136                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 137                  *
 138                  * T_SYM = 4 usec
 139                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 140                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 141                  *      signal ext = 6 usec
 142                  */
 143                 dur = 16; /* SIFS + signal ext */
 144                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 145                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 146
 147                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 148                  *  * times 4 for 5 MHz
 149                  *  * times 2 for 10 MHz
 150                  */
 151                 dur *= 1 << shift;
 152
 153                 /* rates should already consider the channel bandwidth,
 154                  * don't apply divisor again.
 155                  */
 156                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 157                                         4 * rate); /* T_SYM x N_SYM */
 158         } else {
 159                 /*
 160                  * 802.11b or 802.11g with 802.11b compatibility:
 161                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 162                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 163                  *
 164                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 165                  * aSIFSTime = 10 usec
 166                  * aPreambleLength = 144 usec or 72 usec with short preamble
 167                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 168                  */
 169                 dur = 10; /* aSIFSTime = 10 usec */
 170                 dur += short_preamble ? (72 + 24) : (144 + 48);
 171
 172                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 173         }
 174
 175         return dur;
 176 }
 177
 178 /* Exported duration function for driver use */
 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 180                                         struct ieee80211_vif *vif,
 181                                         enum nl80211_band band,
 182                                         size_t frame_len,
 183                                         struct ieee80211_rate *rate)
 184 {
 185         struct ieee80211_sub_if_data *sdata;
 186         u16 dur;
 187         int erp, shift = 0;
 188         bool short_preamble = false;
 189
 190         erp = 0;
 191         if (vif) {
 192                 sdata = vif_to_sdata(vif);
 193                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 194                 if (sdata->deflink.operating_11g_mode)
 195                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 196                 shift = ieee80211_vif_get_shift(vif);
 197         }
 198
 199         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 200                                        short_preamble, shift);
 201
 202         return cpu_to_le16(dur);
 203 }
 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 205
 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 207                               struct ieee80211_vif *vif, size_t frame_len,
 208                               const struct ieee80211_tx_info *frame_txctl)
 209 {
 210         struct ieee80211_local *local = hw_to_local(hw);
 211         struct ieee80211_rate *rate;
 212         struct ieee80211_sub_if_data *sdata;
 213         bool short_preamble;
 214         int erp, shift = 0, bitrate;
 215         u16 dur;
 216         struct ieee80211_supported_band *sband;
 217
 218         sband = local->hw.wiphy->bands[frame_txctl->band];
 219
 220         short_preamble = false;
 221
 222         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 223
 224         erp = 0;
 225         if (vif) {
 226                 sdata = vif_to_sdata(vif);
 227                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 228                 if (sdata->deflink.operating_11g_mode)
 229                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 230                 shift = ieee80211_vif_get_shift(vif);
 231         }
 232
 233         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 234
 235         /* CTS duration */
 236         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                        erp, short_preamble, shift);
 238         /* Data frame duration */
 239         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 240                                         erp, short_preamble, shift);
 241         /* ACK duration */
 242         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 243                                         erp, short_preamble, shift);
 244
 245         return cpu_to_le16(dur);
 246 }
 247 EXPORT_SYMBOL(ieee80211_rts_duration);
 248
 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 250                                     struct ieee80211_vif *vif,
 251                                     size_t frame_len,
 252                                     const struct ieee80211_tx_info *frame_txctl)
 253 {
 254         struct ieee80211_local *local = hw_to_local(hw);
 255         struct ieee80211_rate *rate;
 256         struct ieee80211_sub_if_data *sdata;
 257         bool short_preamble;
 258         int erp, shift = 0, bitrate;
 259         u16 dur;
 260         struct ieee80211_supported_band *sband;
 261
 262         sband = local->hw.wiphy->bands[frame_txctl->band];
 263
 264         short_preamble = false;
 265
 266         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 267         erp = 0;
 268         if (vif) {
 269                 sdata = vif_to_sdata(vif);
 270                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 271                 if (sdata->deflink.operating_11g_mode)
 272                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 273                 shift = ieee80211_vif_get_shift(vif);
 274         }
 275
 276         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 277
 278         /* Data frame duration */
 279         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 280                                        erp, short_preamble, shift);
 281         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 /* ACK duration */
 283                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 284                                                 erp, short_preamble, shift);
 285         }
 286
 287         return cpu_to_le16(dur);
 288 }
 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 290
 291 static void wake_tx_push_queue(struct ieee80211_local *local,
 292                                struct ieee80211_sub_if_data *sdata,
 293                                struct ieee80211_txq *queue)
 294 {
 295         struct ieee80211_tx_control control = {
 296                 .sta = queue->sta,
 297         };
 298         struct sk_buff *skb;
 299
 300         while (1) {
 301                 skb = ieee80211_tx_dequeue(&local->hw, queue);
 302                 if (!skb)
 303                         break;
 304
 305                 drv_tx(local, &control, skb);
 306         }
 307 }
 308
 309 /* wake_tx_queue handler for driver not implementing a custom one*/
 310 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
 311                                     struct ieee80211_txq *txq)
 312 {
 313         struct ieee80211_local *local = hw_to_local(hw);
 314         struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
 315         struct ieee80211_txq *queue;
 316
 317         spin_lock(&local->handle_wake_tx_queue_lock);
 318
 319         /* Use ieee80211_next_txq() for airtime fairness accounting */
 320         ieee80211_txq_schedule_start(hw, txq->ac);
 321         while ((queue = ieee80211_next_txq(hw, txq->ac))) {
 322                 wake_tx_push_queue(local, sdata, queue);
 323                 ieee80211_return_txq(hw, queue, false);
 324         }
 325         ieee80211_txq_schedule_end(hw, txq->ac);
 326         spin_unlock(&local->handle_wake_tx_queue_lock);
 327 }
 328 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
 329
 330 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 331 {
 332         struct ieee80211_local *local = sdata->local;
 333         struct ieee80211_vif *vif = &sdata->vif;
 334         struct fq *fq = &local->fq;
 335         struct ps_data *ps = NULL;
 336         struct txq_info *txqi;
 337         struct sta_info *sta;
 338         int i;
 339
 340         local_bh_disable();
 341         spin_lock(&fq->lock);
 342
 343         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 344                 goto out;
 345
 346         if (sdata->vif.type == NL80211_IFTYPE_AP)
 347                 ps = &sdata->bss->ps;
 348
 349         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 350                 if (sdata != sta->sdata)
 351                         continue;
 352
 353                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 354                         struct ieee80211_txq *txq = sta->sta.txq[i];
 355
 356                         if (!txq)
 357                                 continue;
 358
 359                         txqi = to_txq_info(txq);
 360
 361                         if (ac != txq->ac)
 362                                 continue;
 363
 364                         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
 365                                                 &txqi->flags))
 366                                 continue;
 367
 368                         spin_unlock(&fq->lock);
 369                         drv_wake_tx_queue(local, txqi);
 370                         spin_lock(&fq->lock);
 371                 }
 372         }
 373
 374         if (!vif->txq)
 375                 goto out;
 376
 377         txqi = to_txq_info(vif->txq);
 378
 379         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
 380             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 381                 goto out;
 382
 383         spin_unlock(&fq->lock);
 384
 385         drv_wake_tx_queue(local, txqi);
 386         local_bh_enable();
 387         return;
 388 out:
 389         spin_unlock(&fq->lock);
 390         local_bh_enable();
 391 }
 392
 393 static void
 394 __releases(&local->queue_stop_reason_lock)
 395 __acquires(&local->queue_stop_reason_lock)
 396 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 397 {
 398         struct ieee80211_sub_if_data *sdata;
 399         int n_acs = IEEE80211_NUM_ACS;
 400         int i;
 401
 402         rcu_read_lock();
 403
 404         if (local->hw.queues < IEEE80211_NUM_ACS)
 405                 n_acs = 1;
 406
 407         for (i = 0; i < local->hw.queues; i++) {
 408                 if (local->queue_stop_reasons[i])
 409                         continue;
 410
 411                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 412                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 413                         int ac;
 414
 415                         for (ac = 0; ac < n_acs; ac++) {
 416                                 int ac_queue = sdata->vif.hw_queue[ac];
 417
 418                                 if (ac_queue == i ||
 419                                     sdata->vif.cab_queue == i)
 420                                         __ieee80211_wake_txqs(sdata, ac);
 421                         }
 422                 }
 423                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 424         }
 425
 426         rcu_read_unlock();
 427 }
 428
 429 void ieee80211_wake_txqs(struct tasklet_struct *t)
 430 {
 431         struct ieee80211_local *local = from_tasklet(local, t,
 432                                                      wake_txqs_tasklet);
 433         unsigned long flags;
 434
 435         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 436         _ieee80211_wake_txqs(local, &flags);
 437         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 438 }
 439
 440 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 441                                    enum queue_stop_reason reason,
 442                                    bool refcounted,
 443                                    unsigned long *flags)
 444 {
 445         struct ieee80211_local *local = hw_to_local(hw);
 446
 447         trace_wake_queue(local, queue, reason);
 448
 449         if (WARN_ON(queue >= hw->queues))
 450                 return;
 451
 452         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 453                 return;
 454
 455         if (!refcounted) {
 456                 local->q_stop_reasons[queue][reason] = 0;
 457         } else {
 458                 local->q_stop_reasons[queue][reason]--;
 459                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 460                         local->q_stop_reasons[queue][reason] = 0;
 461         }
 462
 463         if (local->q_stop_reasons[queue][reason] == 0)
 464                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 465
 466         if (local->queue_stop_reasons[queue] != 0)
 467                 /* someone still has this queue stopped */
 468                 return;
 469
 470         if (!skb_queue_empty(&local->pending[queue]))
 471                 tasklet_schedule(&local->tx_pending_tasklet);
 472
 473         /*
 474          * Calling _ieee80211_wake_txqs here can be a problem because it may
 475          * release queue_stop_reason_lock which has been taken by
 476          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 477          * release someone's lock, but it is fine because all the callers of
 478          * __ieee80211_wake_queue call it right before releasing the lock.
 479          */
 480         if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 481                 tasklet_schedule(&local->wake_txqs_tasklet);
 482         else
 483                 _ieee80211_wake_txqs(local, flags);
 484 }
 485
 486 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 487                                     enum queue_stop_reason reason,
 488                                     bool refcounted)
 489 {
 490         struct ieee80211_local *local = hw_to_local(hw);
 491         unsigned long flags;
 492
 493         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 494         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 495         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 496 }
 497
 498 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 499 {
 500         ieee80211_wake_queue_by_reason(hw, queue,
 501                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 502                                        false);
 503 }
 504 EXPORT_SYMBOL(ieee80211_wake_queue);
 505
 506 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 507                                    enum queue_stop_reason reason,
 508                                    bool refcounted)
 509 {
 510         struct ieee80211_local *local = hw_to_local(hw);
 511
 512         trace_stop_queue(local, queue, reason);
 513
 514         if (WARN_ON(queue >= hw->queues))
 515                 return;
 516
 517         if (!refcounted)
 518                 local->q_stop_reasons[queue][reason] = 1;
 519         else
 520                 local->q_stop_reasons[queue][reason]++;
 521
 522         set_bit(reason, &local->queue_stop_reasons[queue]);
 523 }
 524
 525 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 526                                     enum queue_stop_reason reason,
 527                                     bool refcounted)
 528 {
 529         struct ieee80211_local *local = hw_to_local(hw);
 530         unsigned long flags;
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 534         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 535 }
 536
 537 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 538 {
 539         ieee80211_stop_queue_by_reason(hw, queue,
 540                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 541                                        false);
 542 }
 543 EXPORT_SYMBOL(ieee80211_stop_queue);
 544
 545 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 546                                struct sk_buff *skb)
 547 {
 548         struct ieee80211_hw *hw = &local->hw;
 549         unsigned long flags;
 550         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 551         int queue = info->hw_queue;
 552
 553         if (WARN_ON(!info->control.vif)) {
 554                 ieee80211_free_txskb(&local->hw, skb);
 555                 return;
 556         }
 557
 558         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 559         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 560                                false);
 561         __skb_queue_tail(&local->pending[queue], skb);
 562         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 563                                false, &flags);
 564         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 565 }
 566
 567 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 568                                 struct sk_buff_head *skbs)
 569 {
 570         struct ieee80211_hw *hw = &local->hw;
 571         struct sk_buff *skb;
 572         unsigned long flags;
 573         int queue, i;
 574
 575         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 576         while ((skb = skb_dequeue(skbs))) {
 577                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 578
 579                 if (WARN_ON(!info->control.vif)) {
 580                         ieee80211_free_txskb(&local->hw, skb);
 581                         continue;
 582                 }
 583
 584                 queue = info->hw_queue;
 585
 586                 __ieee80211_stop_queue(hw, queue,
 587                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 588                                 false);
 589
 590                 __skb_queue_tail(&local->pending[queue], skb);
 591         }
 592
 593         for (i = 0; i < hw->queues; i++)
 594                 __ieee80211_wake_queue(hw, i,
 595                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 596                         false, &flags);
 597         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 598 }
 599
 600 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 601                                      unsigned long queues,
 602                                      enum queue_stop_reason reason,
 603                                      bool refcounted)
 604 {
 605         struct ieee80211_local *local = hw_to_local(hw);
 606         unsigned long flags;
 607         int i;
 608
 609         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 610
 611         for_each_set_bit(i, &queues, hw->queues)
 612                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 613
 614         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 615 }
 616
 617 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 618 {
 619         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 620                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 621                                         false);
 622 }
 623 EXPORT_SYMBOL(ieee80211_stop_queues);
 624
 625 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 626 {
 627         struct ieee80211_local *local = hw_to_local(hw);
 628         unsigned long flags;
 629         int ret;
 630
 631         if (WARN_ON(queue >= hw->queues))
 632                 return true;
 633
 634         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 635         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 636                        &local->queue_stop_reasons[queue]);
 637         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 638         return ret;
 639 }
 640 EXPORT_SYMBOL(ieee80211_queue_stopped);
 641
 642 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 643                                      unsigned long queues,
 644                                      enum queue_stop_reason reason,
 645                                      bool refcounted)
 646 {
 647         struct ieee80211_local *local = hw_to_local(hw);
 648         unsigned long flags;
 649         int i;
 650
 651         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 652
 653         for_each_set_bit(i, &queues, hw->queues)
 654                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 655
 656         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 657 }
 658
 659 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 660 {
 661         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 662                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 663                                         false);
 664 }
 665 EXPORT_SYMBOL(ieee80211_wake_queues);
 666
 667 static unsigned int
 668 ieee80211_get_vif_queues(struct ieee80211_local *local,
 669                          struct ieee80211_sub_if_data *sdata)
 670 {
 671         unsigned int queues;
 672
 673         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 674                 int ac;
 675
 676                 queues = 0;
 677
 678                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 679                         queues |= BIT(sdata->vif.hw_queue[ac]);
 680                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 681                         queues |= BIT(sdata->vif.cab_queue);
 682         } else {
 683                 /* all queues */
 684                 queues = BIT(local->hw.queues) - 1;
 685         }
 686
 687         return queues;
 688 }
 689
 690 void __ieee80211_flush_queues(struct ieee80211_local *local,
 691                               struct ieee80211_sub_if_data *sdata,
 692                               unsigned int queues, bool drop)
 693 {
 694         if (!local->ops->flush)
 695                 return;
 696
 697         /*
 698          * If no queue was set, or if the HW doesn't support
 699          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 700          */
 701         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 702                 queues = ieee80211_get_vif_queues(local, sdata);
 703
 704         ieee80211_stop_queues_by_reason(&local->hw, queues,
 705                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 706                                         false);
 707
 708         drv_flush(local, sdata, queues, drop);
 709
 710         ieee80211_wake_queues_by_reason(&local->hw, queues,
 711                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 712                                         false);
 713 }
 714
 715 void ieee80211_flush_queues(struct ieee80211_local *local,
 716                             struct ieee80211_sub_if_data *sdata, bool drop)
 717 {
 718         __ieee80211_flush_queues(local, sdata, 0, drop);
 719 }
 720
 721 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 722                                struct ieee80211_sub_if_data *sdata,
 723                                enum queue_stop_reason reason)
 724 {
 725         ieee80211_stop_queues_by_reason(&local->hw,
 726                                         ieee80211_get_vif_queues(local, sdata),
 727                                         reason, true);
 728 }
 729
 730 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 731                                struct ieee80211_sub_if_data *sdata,
 732                                enum queue_stop_reason reason)
 733 {
 734         ieee80211_wake_queues_by_reason(&local->hw,
 735                                         ieee80211_get_vif_queues(local, sdata),
 736                                         reason, true);
 737 }
 738
 739 static void __iterate_interfaces(struct ieee80211_local *local,
 740                                  u32 iter_flags,
 741                                  void (*iterator)(void *data, u8 *mac,
 742                                                   struct ieee80211_vif *vif),
 743                                  void *data)
 744 {
 745         struct ieee80211_sub_if_data *sdata;
 746         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 747
 748         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 749                 switch (sdata->vif.type) {
 750                 case NL80211_IFTYPE_MONITOR:
 751                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 752                                 continue;
 753                         break;
 754                 case NL80211_IFTYPE_AP_VLAN:
 755                         continue;
 756                 default:
 757                         break;
 758                 }
 759                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 760                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 761                         continue;
 762                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 763                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 764                         continue;
 765                 if (ieee80211_sdata_running(sdata) || !active_only)
 766                         iterator(data, sdata->vif.addr,
 767                                  &sdata->vif);
 768         }
 769
 770         sdata = rcu_dereference_check(local->monitor_sdata,
 771                                       lockdep_is_held(&local->iflist_mtx) ||
 772                                       lockdep_is_held(&local->hw.wiphy->mtx));
 773         if (sdata &&
 774             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 775              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 776                 iterator(data, sdata->vif.addr, &sdata->vif);
 777 }
 778
 779 void ieee80211_iterate_interfaces(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         mutex_lock(&local->iflist_mtx);
 788         __iterate_interfaces(local, iter_flags, iterator, data);
 789         mutex_unlock(&local->iflist_mtx);
 790 }
 791 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 792
 793 void ieee80211_iterate_active_interfaces_atomic(
 794         struct ieee80211_hw *hw, u32 iter_flags,
 795         void (*iterator)(void *data, u8 *mac,
 796                          struct ieee80211_vif *vif),
 797         void *data)
 798 {
 799         struct ieee80211_local *local = hw_to_local(hw);
 800
 801         rcu_read_lock();
 802         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 803                              iterator, data);
 804         rcu_read_unlock();
 805 }
 806 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 807
 808 void ieee80211_iterate_active_interfaces_mtx(
 809         struct ieee80211_hw *hw, u32 iter_flags,
 810         void (*iterator)(void *data, u8 *mac,
 811                          struct ieee80211_vif *vif),
 812         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         lockdep_assert_wiphy(hw->wiphy);
 817
 818         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 819                              iterator, data);
 820 }
 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 822
 823 static void __iterate_stations(struct ieee80211_local *local,
 824                                void (*iterator)(void *data,
 825                                                 struct ieee80211_sta *sta),
 826                                void *data)
 827 {
 828         struct sta_info *sta;
 829
 830         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 831                 if (!sta->uploaded)
 832                         continue;
 833
 834                 iterator(data, &sta->sta);
 835         }
 836 }
 837
 838 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 839                         void (*iterator)(void *data,
 840                                          struct ieee80211_sta *sta),
 841                         void *data)
 842 {
 843         struct ieee80211_local *local = hw_to_local(hw);
 844
 845         rcu_read_lock();
 846         __iterate_stations(local, iterator, data);
 847         rcu_read_unlock();
 848 }
 849 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 850
 851 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 852 {
 853         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 854
 855         if (!ieee80211_sdata_running(sdata) ||
 856             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 857                 return NULL;
 858         return &sdata->vif;
 859 }
 860 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 861
 862 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 863 {
 864         if (!vif)
 865                 return NULL;
 866
 867         return &vif_to_sdata(vif)->wdev;
 868 }
 869 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 870
 871 /*
 872  * Nothing should have been stuffed into the workqueue during
 873  * the suspend->resume cycle. Since we can't check each caller
 874  * of this function if we are already quiescing / suspended,
 875  * check here and don't WARN since this can actually happen when
 876  * the rx path (for example) is racing against __ieee80211_suspend
 877  * and suspending / quiescing was set after the rx path checked
 878  * them.
 879  */
 880 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 881 {
 882         if (local->quiescing || (local->suspended && !local->resuming)) {
 883                 pr_warn("queueing ieee80211 work while going to suspend\n");
 884                 return false;
 885         }
 886
 887         return true;
 888 }
 889
 890 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 891 {
 892         struct ieee80211_local *local = hw_to_local(hw);
 893
 894         if (!ieee80211_can_queue_work(local))
 895                 return;
 896
 897         queue_work(local->workqueue, work);
 898 }
 899 EXPORT_SYMBOL(ieee80211_queue_work);
 900
 901 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 902                                   struct delayed_work *dwork,
 903                                   unsigned long delay)
 904 {
 905         struct ieee80211_local *local = hw_to_local(hw);
 906
 907         if (!ieee80211_can_queue_work(local))
 908                 return;
 909
 910         queue_delayed_work(local->workqueue, dwork, delay);
 911 }
 912 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 913
 914 static void
 915 ieee80211_parse_extension_element(u32 *crc,
 916                                   const struct element *elem,
 917                                   struct ieee802_11_elems *elems,
 918                                   struct ieee80211_elems_parse_params *params)
 919 {
 920         const void *data = elem->data + 1;
 921         u8 len;
 922
 923         if (!elem->datalen)
 924                 return;
 925
 926         len = elem->datalen - 1;
 927
 928         switch (elem->data[0]) {
 929         case WLAN_EID_EXT_HE_MU_EDCA:
 930                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 931                         elems->mu_edca_param_set = data;
 932                         if (crc)
 933                                 *crc = crc32_be(*crc, (void *)elem,
 934                                                 elem->datalen + 2);
 935                 }
 936                 break;
 937         case WLAN_EID_EXT_HE_CAPABILITY:
 938                 if (ieee80211_he_capa_size_ok(data, len)) {
 939                         elems->he_cap = data;
 940                         elems->he_cap_len = len;
 941                 }
 942                 break;
 943         case WLAN_EID_EXT_HE_OPERATION:
 944                 if (len >= sizeof(*elems->he_operation) &&
 945                     len >= ieee80211_he_oper_size(data) - 1) {
 946                         if (crc)
 947                                 *crc = crc32_be(*crc, (void *)elem,
 948                                                 elem->datalen + 2);
 949                         elems->he_operation = data;
 950                 }
 951                 break;
 952         case WLAN_EID_EXT_UORA:
 953                 if (len >= 1)
 954                         elems->uora_element = data;
 955                 break;
 956         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 957                 if (len == 3)
 958                         elems->max_channel_switch_time = data;
 959                 break;
 960         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 961                 if (len >= sizeof(*elems->mbssid_config_ie))
 962                         elems->mbssid_config_ie = data;
 963                 break;
 964         case WLAN_EID_EXT_HE_SPR:
 965                 if (len >= sizeof(*elems->he_spr) &&
 966                     len >= ieee80211_he_spr_size(data))
 967                         elems->he_spr = data;
 968                 break;
 969         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 970                 if (len >= sizeof(*elems->he_6ghz_capa))
 971                         elems->he_6ghz_capa = data;
 972                 break;
 973         case WLAN_EID_EXT_EHT_CAPABILITY:
 974                 if (ieee80211_eht_capa_size_ok(elems->he_cap,
 975                                                data, len,
 976                                                params->from_ap)) {
 977                         elems->eht_cap = data;
 978                         elems->eht_cap_len = len;
 979                 }
 980                 break;
 981         case WLAN_EID_EXT_EHT_OPERATION:
 982                 if (ieee80211_eht_oper_size_ok(data, len))
 983                         elems->eht_operation = data;
 984                 break;
 985         case WLAN_EID_EXT_EHT_MULTI_LINK:
 986                 if (ieee80211_mle_size_ok(data, len)) {
 987                         elems->multi_link = (void *)data;
 988                         elems->multi_link_len = len;
 989                 }
 990                 break;
 991         }
 992 }
 993
 994 static u32
 995 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
 996                              struct ieee802_11_elems *elems,
 997                              const struct element *check_inherit)
 998 {
 999         const struct element *elem;
1000         bool calc_crc = params->filter != 0;
1001         DECLARE_BITMAP(seen_elems, 256);
1002         u32 crc = params->crc;
1003         const u8 *ie;
1004
1005         bitmap_zero(seen_elems, 256);
1006
1007         for_each_element(elem, params->start, params->len) {
1008                 bool elem_parse_failed;
1009                 u8 id = elem->id;
1010                 u8 elen = elem->datalen;
1011                 const u8 *pos = elem->data;
1012
1013                 if (check_inherit &&
1014                     !cfg80211_is_element_inherited(elem,
1015                                                    check_inherit))
1016                         continue;
1017
1018                 switch (id) {
1019                 case WLAN_EID_SSID:
1020                 case WLAN_EID_SUPP_RATES:
1021                 case WLAN_EID_FH_PARAMS:
1022                 case WLAN_EID_DS_PARAMS:
1023                 case WLAN_EID_CF_PARAMS:
1024                 case WLAN_EID_TIM:
1025                 case WLAN_EID_IBSS_PARAMS:
1026                 case WLAN_EID_CHALLENGE:
1027                 case WLAN_EID_RSN:
1028                 case WLAN_EID_ERP_INFO:
1029                 case WLAN_EID_EXT_SUPP_RATES:
1030                 case WLAN_EID_HT_CAPABILITY:
1031                 case WLAN_EID_HT_OPERATION:
1032                 case WLAN_EID_VHT_CAPABILITY:
1033                 case WLAN_EID_VHT_OPERATION:
1034                 case WLAN_EID_MESH_ID:
1035                 case WLAN_EID_MESH_CONFIG:
1036                 case WLAN_EID_PEER_MGMT:
1037                 case WLAN_EID_PREQ:
1038                 case WLAN_EID_PREP:
1039                 case WLAN_EID_PERR:
1040                 case WLAN_EID_RANN:
1041                 case WLAN_EID_CHANNEL_SWITCH:
1042                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1043                 case WLAN_EID_COUNTRY:
1044                 case WLAN_EID_PWR_CONSTRAINT:
1045                 case WLAN_EID_TIMEOUT_INTERVAL:
1046                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1048                 case WLAN_EID_CHAN_SWITCH_PARAM:
1049                 case WLAN_EID_EXT_CAPABILITY:
1050                 case WLAN_EID_CHAN_SWITCH_TIMING:
1051                 case WLAN_EID_LINK_ID:
1052                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1053                 case WLAN_EID_RSNX:
1054                 case WLAN_EID_S1G_BCN_COMPAT:
1055                 case WLAN_EID_S1G_CAPABILITIES:
1056                 case WLAN_EID_S1G_OPERATION:
1057                 case WLAN_EID_AID_RESPONSE:
1058                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1059                 /*
1060                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1061                  * that if the content gets bigger it might be needed more than once
1062                  */
1063                         if (test_bit(id, seen_elems)) {
1064                                 elems->parse_error = true;
1065                                 continue;
1066                         }
1067                         break;
1068                 }
1069
1070                 if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
1071                         crc = crc32_be(crc, pos - 2, elen + 2);
1072
1073                 elem_parse_failed = false;
1074
1075                 switch (id) {
1076                 case WLAN_EID_LINK_ID:
1077                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1078                                 elem_parse_failed = true;
1079                                 break;
1080                         }
1081                         elems->lnk_id = (void *)(pos - 2);
1082                         break;
1083                 case WLAN_EID_CHAN_SWITCH_TIMING:
1084                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1085                                 elem_parse_failed = true;
1086                                 break;
1087                         }
1088                         elems->ch_sw_timing = (void *)pos;
1089                         break;
1090                 case WLAN_EID_EXT_CAPABILITY:
1091                         elems->ext_capab = pos;
1092                         elems->ext_capab_len = elen;
1093                         break;
1094                 case WLAN_EID_SSID:
1095                         elems->ssid = pos;
1096                         elems->ssid_len = elen;
1097                         break;
1098                 case WLAN_EID_SUPP_RATES:
1099                         elems->supp_rates = pos;
1100                         elems->supp_rates_len = elen;
1101                         break;
1102                 case WLAN_EID_DS_PARAMS:
1103                         if (elen >= 1)
1104                                 elems->ds_params = pos;
1105                         else
1106                                 elem_parse_failed = true;
1107                         break;
1108                 case WLAN_EID_TIM:
1109                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1110                                 elems->tim = (void *)pos;
1111                                 elems->tim_len = elen;
1112                         } else
1113                                 elem_parse_failed = true;
1114                         break;
1115                 case WLAN_EID_VENDOR_SPECIFIC:
1116                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1117                             pos[2] == 0xf2) {
1118                                 /* Microsoft OUI (00:50:F2) */
1119
1120                                 if (calc_crc)
1121                                         crc = crc32_be(crc, pos - 2, elen + 2);
1122
1123                                 if (elen >= 5 && pos[3] == 2) {
1124                                         /* OUI Type 2 - WMM IE */
1125                                         if (pos[4] == 0) {
1126                                                 elems->wmm_info = pos;
1127                                                 elems->wmm_info_len = elen;
1128                                         } else if (pos[4] == 1) {
1129                                                 elems->wmm_param = pos;
1130                                                 elems->wmm_param_len = elen;
1131                                         }
1132                                 }
1133                         }
1134                         break;
1135                 case WLAN_EID_RSN:
1136                         elems->rsn = pos;
1137                         elems->rsn_len = elen;
1138                         break;
1139                 case WLAN_EID_ERP_INFO:
1140                         if (elen >= 1)
1141                                 elems->erp_info = pos;
1142                         else
1143                                 elem_parse_failed = true;
1144                         break;
1145                 case WLAN_EID_EXT_SUPP_RATES:
1146                         elems->ext_supp_rates = pos;
1147                         elems->ext_supp_rates_len = elen;
1148                         break;
1149                 case WLAN_EID_HT_CAPABILITY:
1150                         if (elen >= sizeof(struct ieee80211_ht_cap))
1151                                 elems->ht_cap_elem = (void *)pos;
1152                         else
1153                                 elem_parse_failed = true;
1154                         break;
1155                 case WLAN_EID_HT_OPERATION:
1156                         if (elen >= sizeof(struct ieee80211_ht_operation))
1157                                 elems->ht_operation = (void *)pos;
1158                         else
1159                                 elem_parse_failed = true;
1160                         break;
1161                 case WLAN_EID_VHT_CAPABILITY:
1162                         if (elen >= sizeof(struct ieee80211_vht_cap))
1163                                 elems->vht_cap_elem = (void *)pos;
1164                         else
1165                                 elem_parse_failed = true;
1166                         break;
1167                 case WLAN_EID_VHT_OPERATION:
1168                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1169                                 elems->vht_operation = (void *)pos;
1170                                 if (calc_crc)
1171                                         crc = crc32_be(crc, pos - 2, elen + 2);
1172                                 break;
1173                         }
1174                         elem_parse_failed = true;
1175                         break;
1176                 case WLAN_EID_OPMODE_NOTIF:
1177                         if (elen > 0) {
1178                                 elems->opmode_notif = pos;
1179                                 if (calc_crc)
1180                                         crc = crc32_be(crc, pos - 2, elen + 2);
1181                                 break;
1182                         }
1183                         elem_parse_failed = true;
1184                         break;
1185                 case WLAN_EID_MESH_ID:
1186                         elems->mesh_id = pos;
1187                         elems->mesh_id_len = elen;
1188                         break;
1189                 case WLAN_EID_MESH_CONFIG:
1190                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1191                                 elems->mesh_config = (void *)pos;
1192                         else
1193                                 elem_parse_failed = true;
1194                         break;
1195                 case WLAN_EID_PEER_MGMT:
1196                         elems->peering = pos;
1197                         elems->peering_len = elen;
1198                         break;
1199                 case WLAN_EID_MESH_AWAKE_WINDOW:
1200                         if (elen >= 2)
1201                                 elems->awake_window = (void *)pos;
1202                         break;
1203                 case WLAN_EID_PREQ:
1204                         elems->preq = pos;
1205                         elems->preq_len = elen;
1206                         break;
1207                 case WLAN_EID_PREP:
1208                         elems->prep = pos;
1209                         elems->prep_len = elen;
1210                         break;
1211                 case WLAN_EID_PERR:
1212                         elems->perr = pos;
1213                         elems->perr_len = elen;
1214                         break;
1215                 case WLAN_EID_RANN:
1216                         if (elen >= sizeof(struct ieee80211_rann_ie))
1217                                 elems->rann = (void *)pos;
1218                         else
1219                                 elem_parse_failed = true;
1220                         break;
1221                 case WLAN_EID_CHANNEL_SWITCH:
1222                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1223                                 elem_parse_failed = true;
1224                                 break;
1225                         }
1226                         elems->ch_switch_ie = (void *)pos;
1227                         break;
1228                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1229                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1230                                 elem_parse_failed = true;
1231                                 break;
1232                         }
1233                         elems->ext_chansw_ie = (void *)pos;
1234                         break;
1235                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1236                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1237                                 elem_parse_failed = true;
1238                                 break;
1239                         }
1240                         elems->sec_chan_offs = (void *)pos;
1241                         break;
1242                 case WLAN_EID_CHAN_SWITCH_PARAM:
1243                         if (elen <
1244                             sizeof(*elems->mesh_chansw_params_ie)) {
1245                                 elem_parse_failed = true;
1246                                 break;
1247                         }
1248                         elems->mesh_chansw_params_ie = (void *)pos;
1249                         break;
1250                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1251                         if (!params->action ||
1252                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1253                                 elem_parse_failed = true;
1254                                 break;
1255                         }
1256                         elems->wide_bw_chansw_ie = (void *)pos;
1257                         break;
1258                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1259                         if (params->action) {
1260                                 elem_parse_failed = true;
1261                                 break;
1262                         }
1263                         /*
1264                          * This is a bit tricky, but as we only care about
1265                          * the wide bandwidth channel switch element, so
1266                          * just parse it out manually.
1267                          */
1268                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1269                                               pos, elen);
1270                         if (ie) {
1271                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1272                                         elems->wide_bw_chansw_ie =
1273                                                 (void *)(ie + 2);
1274                                 else
1275                                         elem_parse_failed = true;
1276                         }
1277                         break;
1278                 case WLAN_EID_COUNTRY:
1279                         elems->country_elem = pos;
1280                         elems->country_elem_len = elen;
1281                         break;
1282                 case WLAN_EID_PWR_CONSTRAINT:
1283                         if (elen != 1) {
1284                                 elem_parse_failed = true;
1285                                 break;
1286                         }
1287                         elems->pwr_constr_elem = pos;
1288                         break;
1289                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1290                         /* Lots of different options exist, but we only care
1291                          * about the Dynamic Transmit Power Control element.
1292                          * First check for the Cisco OUI, then for the DTPC
1293                          * tag (0x00).
1294                          */
1295                         if (elen < 4) {
1296                                 elem_parse_failed = true;
1297                                 break;
1298                         }
1299
1300                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1301                             pos[2] != 0x96 || pos[3] != 0x00)
1302                                 break;
1303
1304                         if (elen != 6) {
1305                                 elem_parse_failed = true;
1306                                 break;
1307                         }
1308
1309                         if (calc_crc)
1310                                 crc = crc32_be(crc, pos - 2, elen + 2);
1311
1312                         elems->cisco_dtpc_elem = pos;
1313                         break;
1314                 case WLAN_EID_ADDBA_EXT:
1315                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1316                                 elem_parse_failed = true;
1317                                 break;
1318                         }
1319                         elems->addba_ext_ie = (void *)pos;
1320                         break;
1321                 case WLAN_EID_TIMEOUT_INTERVAL:
1322                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1323                                 elems->timeout_int = (void *)pos;
1324                         else
1325                                 elem_parse_failed = true;
1326                         break;
1327                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1328                         if (elen >= sizeof(*elems->max_idle_period_ie))
1329                                 elems->max_idle_period_ie = (void *)pos;
1330                         break;
1331                 case WLAN_EID_RSNX:
1332                         elems->rsnx = pos;
1333                         elems->rsnx_len = elen;
1334                         break;
1335                 case WLAN_EID_TX_POWER_ENVELOPE:
1336                         if (elen < 1 ||
1337                             elen > sizeof(struct ieee80211_tx_pwr_env))
1338                                 break;
1339
1340                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1341                                 break;
1342
1343                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1344                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1345                         elems->tx_pwr_env_num++;
1346                         break;
1347                 case WLAN_EID_EXTENSION:
1348                         ieee80211_parse_extension_element(calc_crc ?
1349                                                                 &crc : NULL,
1350                                                           elem, elems, params);
1351                         break;
1352                 case WLAN_EID_S1G_CAPABILITIES:
1353                         if (elen >= sizeof(*elems->s1g_capab))
1354                                 elems->s1g_capab = (void *)pos;
1355                         else
1356                                 elem_parse_failed = true;
1357                         break;
1358                 case WLAN_EID_S1G_OPERATION:
1359                         if (elen == sizeof(*elems->s1g_oper))
1360                                 elems->s1g_oper = (void *)pos;
1361                         else
1362                                 elem_parse_failed = true;
1363                         break;
1364                 case WLAN_EID_S1G_BCN_COMPAT:
1365                         if (elen == sizeof(*elems->s1g_bcn_compat))
1366                                 elems->s1g_bcn_compat = (void *)pos;
1367                         else
1368                                 elem_parse_failed = true;
1369                         break;
1370                 case WLAN_EID_AID_RESPONSE:
1371                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1372                                 elems->aid_resp = (void *)pos;
1373                         else
1374                                 elem_parse_failed = true;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379
1380                 if (elem_parse_failed)
1381                         elems->parse_error = true;
1382                 else
1383                         __set_bit(id, seen_elems);
1384         }
1385
1386         if (!for_each_element_completed(elem, params->start, params->len))
1387                 elems->parse_error = true;
1388
1389         return crc;
1390 }
1391
1392 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1393                                             struct ieee802_11_elems *elems,
1394                                             struct cfg80211_bss *bss,
1395                                             u8 *nontransmitted_profile)
1396 {
1397         const struct element *elem, *sub;
1398         size_t profile_len = 0;
1399         bool found = false;
1400
1401         if (!bss || !bss->transmitted_bss)
1402                 return profile_len;
1403
1404         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1405                 if (elem->datalen < 2)
1406                         continue;
1407                 if (elem->data[0] < 1 || elem->data[0] > 8)
1408                         continue;
1409
1410                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1411                         u8 new_bssid[ETH_ALEN];
1412                         const u8 *index;
1413
1414                         if (sub->id != 0 || sub->datalen < 4) {
1415                                 /* not a valid BSS profile */
1416                                 continue;
1417                         }
1418
1419                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1420                             sub->data[1] != 2) {
1421                                 /* The first element of the
1422                                  * Nontransmitted BSSID Profile is not
1423                                  * the Nontransmitted BSSID Capability
1424                                  * element.
1425                                  */
1426                                 continue;
1427                         }
1428
1429                         memset(nontransmitted_profile, 0, len);
1430                         profile_len = cfg80211_merge_profile(start, len,
1431                                                              elem,
1432                                                              sub,
1433                                                              nontransmitted_profile,
1434                                                              len);
1435
1436                         /* found a Nontransmitted BSSID Profile */
1437                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1438                                                  nontransmitted_profile,
1439                                                  profile_len);
1440                         if (!index || index[1] < 1 || index[2] == 0) {
1441                                 /* Invalid MBSSID Index element */
1442                                 continue;
1443                         }
1444
1445                         cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
1446                                                elem->data[0],
1447                                                index[2],
1448                                                new_bssid);
1449                         if (ether_addr_equal(new_bssid, bss->bssid)) {
1450                                 found = true;
1451                                 elems->bssid_index_len = index[1];
1452                                 elems->bssid_index = (void *)&index[2];
1453                                 break;
1454                         }
1455                 }
1456         }
1457
1458         return found ? profile_len : 0;
1459 }
1460
1461 static void ieee80211_defragment_element(struct ieee802_11_elems *elems,
1462                                          void **elem_ptr, size_t *len,
1463                                          size_t total_len, u8 frag_id)
1464 {
1465         u8 *data = *elem_ptr, *pos, *start;
1466         const struct element *elem;
1467
1468         /*
1469          * Since 'data' points to the data of the element, not the element
1470          * itself, allow 254 in case it was an extended element where the
1471          * extended ID isn't part of the data we see here and thus not part of
1472          * 'len' either.
1473          */
1474         if (!data || (*len != 254 && *len != 255))
1475                 return;
1476
1477         start = elems->scratch_pos;
1478
1479         if (WARN_ON(*len > (elems->scratch + elems->scratch_len -
1480                             elems->scratch_pos)))
1481                 return;
1482
1483         memcpy(elems->scratch_pos, data, *len);
1484         elems->scratch_pos += *len;
1485
1486         pos = data + *len;
1487         total_len -= *len;
1488         for_each_element(elem, pos, total_len) {
1489                 if (elem->id != frag_id)
1490                         break;
1491
1492                 if (WARN_ON(elem->datalen >
1493                             (elems->scratch + elems->scratch_len -
1494                              elems->scratch_pos)))
1495                         return;
1496
1497                 memcpy(elems->scratch_pos, elem->data, elem->datalen);
1498                 elems->scratch_pos += elem->datalen;
1499
1500                 *len += elem->datalen;
1501         }
1502
1503         *elem_ptr = start;
1504 }
1505
1506 static void ieee80211_mle_get_sta_prof(struct ieee802_11_elems *elems,
1507                                        u8 link_id)
1508 {
1509         const struct ieee80211_multi_link_elem *ml = elems->multi_link;
1510         size_t ml_len = elems->multi_link_len;
1511         const struct element *sub;
1512
1513         if (!ml || !ml_len)
1514                 return;
1515
1516         if (le16_get_bits(ml->control, IEEE80211_ML_CONTROL_TYPE) !=
1517             IEEE80211_ML_CONTROL_TYPE_BASIC)
1518                 return;
1519
1520         for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
1521                 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
1522                 u16 control;
1523
1524                 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
1525                         continue;
1526
1527                 if (!ieee80211_mle_sta_prof_size_ok(sub->data, sub->datalen))
1528                         return;
1529
1530                 control = le16_to_cpu(prof->control);
1531
1532                 if (link_id != u16_get_bits(control,
1533                                             IEEE80211_MLE_STA_CONTROL_LINK_ID))
1534                         continue;
1535
1536                 if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE))
1537                         return;
1538
1539                 elems->prof = prof;
1540                 elems->sta_prof_len = sub->datalen;
1541
1542                 /* the sub element can be fragmented */
1543                 ieee80211_defragment_element(elems, (void **)&elems->prof,
1544                                              &elems->sta_prof_len,
1545                                              ml_len - (sub->data - (u8 *)ml),
1546                                              IEEE80211_MLE_SUBELEM_FRAGMENT);
1547                 return;
1548         }
1549 }
1550
1551 static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems,
1552                                      struct ieee80211_elems_parse_params *params)
1553 {
1554         struct ieee80211_mle_per_sta_profile *prof;
1555         struct ieee80211_elems_parse_params sub = {
1556                 .action = params->action,
1557                 .from_ap = params->from_ap,
1558                 .link_id = -1,
1559         };
1560         const struct element *non_inherit = NULL;
1561         const u8 *end;
1562
1563         if (params->link_id == -1)
1564                 return;
1565
1566         ieee80211_defragment_element(elems, (void **)&elems->multi_link,
1567                                      &elems->multi_link_len,
1568                                      elems->total_len - ((u8 *)elems->multi_link -
1569                                                          elems->ie_start),
1570                                      WLAN_EID_FRAGMENT);
1571
1572         ieee80211_mle_get_sta_prof(elems, params->link_id);
1573         prof = elems->prof;
1574
1575         if (!prof)
1576                 return;
1577
1578         /* check if we have the 4 bytes for the fixed part in assoc response */
1579         if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) {
1580                 elems->prof = NULL;
1581                 elems->sta_prof_len = 0;
1582                 return;
1583         }
1584
1585         /*
1586          * Skip the capability information and the status code that are expected
1587          * as part of the station profile in association response frames. Note
1588          * the -1 is because the 'sta_info_len' is accounted to as part of the
1589          * per-STA profile, but not part of the 'u8 variable[]' portion.
1590          */
1591         sub.start = prof->variable + prof->sta_info_len - 1 + 4;
1592         end = (const u8 *)prof + elems->sta_prof_len;
1593         sub.len = end - sub.start;
1594
1595         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1596                                              sub.start, sub.len);
1597         _ieee802_11_parse_elems_full(&sub, elems, non_inherit);
1598 }
1599
1600 struct ieee802_11_elems *
1601 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
1602 {
1603         struct ieee802_11_elems *elems;
1604         const struct element *non_inherit = NULL;
1605         u8 *nontransmitted_profile;
1606         int nontransmitted_profile_len = 0;
1607         size_t scratch_len = params->scratch_len ?: 3 * params->len;
1608
1609         elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC);
1610         if (!elems)
1611                 return NULL;
1612         elems->ie_start = params->start;
1613         elems->total_len = params->len;
1614         elems->scratch_len = scratch_len;
1615         elems->scratch_pos = elems->scratch;
1616
1617         nontransmitted_profile = elems->scratch_pos;
1618         nontransmitted_profile_len =
1619                 ieee802_11_find_bssid_profile(params->start, params->len,
1620                                               elems, params->bss,
1621                                               nontransmitted_profile);
1622         elems->scratch_pos += nontransmitted_profile_len;
1623         elems->scratch_len -= nontransmitted_profile_len;
1624         non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1625                                              nontransmitted_profile,
1626                                              nontransmitted_profile_len);
1627
1628         elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit);
1629
1630         /* Override with nontransmitted profile, if found */
1631         if (nontransmitted_profile_len) {
1632                 struct ieee80211_elems_parse_params sub = {
1633                         .start = nontransmitted_profile,
1634                         .len = nontransmitted_profile_len,
1635                         .action = params->action,
1636                         .link_id = params->link_id,
1637                 };
1638
1639                 _ieee802_11_parse_elems_full(&sub, elems, NULL);
1640         }
1641
1642         ieee80211_mle_parse_link(elems, params);
1643
1644         if (elems->tim && !elems->parse_error) {
1645                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1646
1647                 elems->dtim_period = tim_ie->dtim_period;
1648                 elems->dtim_count = tim_ie->dtim_count;
1649         }
1650
1651         /* Override DTIM period and count if needed */
1652         if (elems->bssid_index &&
1653             elems->bssid_index_len >=
1654             offsetofend(struct ieee80211_bssid_index, dtim_period))
1655                 elems->dtim_period = elems->bssid_index->dtim_period;
1656
1657         if (elems->bssid_index &&
1658             elems->bssid_index_len >=
1659             offsetofend(struct ieee80211_bssid_index, dtim_count))
1660                 elems->dtim_count = elems->bssid_index->dtim_count;
1661
1662         return elems;
1663 }
1664
1665 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1666                                            struct ieee80211_tx_queue_params
1667                                            *qparam, int ac)
1668 {
1669         struct ieee80211_chanctx_conf *chanctx_conf;
1670         const struct ieee80211_reg_rule *rrule;
1671         const struct ieee80211_wmm_ac *wmm_ac;
1672         u16 center_freq = 0;
1673
1674         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1675             sdata->vif.type != NL80211_IFTYPE_STATION)
1676                 return;
1677
1678         rcu_read_lock();
1679         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
1680         if (chanctx_conf)
1681                 center_freq = chanctx_conf->def.chan->center_freq;
1682
1683         if (!center_freq) {
1684                 rcu_read_unlock();
1685                 return;
1686         }
1687
1688         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1689
1690         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1691                 rcu_read_unlock();
1692                 return;
1693         }
1694
1695         if (sdata->vif.type == NL80211_IFTYPE_AP)
1696                 wmm_ac = &rrule->wmm_rule.ap[ac];
1697         else
1698                 wmm_ac = &rrule->wmm_rule.client[ac];
1699         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1700         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1701         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1702         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1703         rcu_read_unlock();
1704 }
1705
1706 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
1707                                bool bss_notify, bool enable_qos)
1708 {
1709         struct ieee80211_sub_if_data *sdata = link->sdata;
1710         struct ieee80211_local *local = sdata->local;
1711         struct ieee80211_tx_queue_params qparam;
1712         struct ieee80211_chanctx_conf *chanctx_conf;
1713         int ac;
1714         bool use_11b;
1715         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1716         int aCWmin, aCWmax;
1717
1718         if (!local->ops->conf_tx)
1719                 return;
1720
1721         if (local->hw.queues < IEEE80211_NUM_ACS)
1722                 return;
1723
1724         memset(&qparam, 0, sizeof(qparam));
1725
1726         rcu_read_lock();
1727         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
1728         use_11b = (chanctx_conf &&
1729                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1730                  !link->operating_11g_mode;
1731         rcu_read_unlock();
1732
1733         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1734
1735         /* Set defaults according to 802.11-2007 Table 7-37 */
1736         aCWmax = 1023;
1737         if (use_11b)
1738                 aCWmin = 31;
1739         else
1740                 aCWmin = 15;
1741
1742         /* Confiure old 802.11b/g medium access rules. */
1743         qparam.cw_max = aCWmax;
1744         qparam.cw_min = aCWmin;
1745         qparam.txop = 0;
1746         qparam.aifs = 2;
1747
1748         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1749                 /* Update if QoS is enabled. */
1750                 if (enable_qos) {
1751                         switch (ac) {
1752                         case IEEE80211_AC_BK:
1753                                 qparam.cw_max = aCWmax;
1754                                 qparam.cw_min = aCWmin;
1755                                 qparam.txop = 0;
1756                                 if (is_ocb)
1757                                         qparam.aifs = 9;
1758                                 else
1759                                         qparam.aifs = 7;
1760                                 break;
1761                         /* never happens but let's not leave undefined */
1762                         default:
1763                         case IEEE80211_AC_BE:
1764                                 qparam.cw_max = aCWmax;
1765                                 qparam.cw_min = aCWmin;
1766                                 qparam.txop = 0;
1767                                 if (is_ocb)
1768                                         qparam.aifs = 6;
1769                                 else
1770                                         qparam.aifs = 3;
1771                                 break;
1772                         case IEEE80211_AC_VI:
1773                                 qparam.cw_max = aCWmin;
1774                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1775                                 if (is_ocb)
1776                                         qparam.txop = 0;
1777                                 else if (use_11b)
1778                                         qparam.txop = 6016/32;
1779                                 else
1780                                         qparam.txop = 3008/32;
1781
1782                                 if (is_ocb)
1783                                         qparam.aifs = 3;
1784                                 else
1785                                         qparam.aifs = 2;
1786                                 break;
1787                         case IEEE80211_AC_VO:
1788                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1789                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1790                                 if (is_ocb)
1791                                         qparam.txop = 0;
1792                                 else if (use_11b)
1793                                         qparam.txop = 3264/32;
1794                                 else
1795                                         qparam.txop = 1504/32;
1796                                 qparam.aifs = 2;
1797                                 break;
1798                         }
1799                 }
1800                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1801
1802                 qparam.uapsd = false;
1803
1804                 link->tx_conf[ac] = qparam;
1805                 drv_conf_tx(local, link, ac, &qparam);
1806         }
1807
1808         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1809             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1810             sdata->vif.type != NL80211_IFTYPE_NAN) {
1811                 link->conf->qos = enable_qos;
1812                 if (bss_notify)
1813                         ieee80211_link_info_change_notify(sdata, link,
1814                                                           BSS_CHANGED_QOS);
1815         }
1816 }
1817
1818 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1819                          u16 transaction, u16 auth_alg, u16 status,
1820                          const u8 *extra, size_t extra_len, const u8 *da,
1821                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1822                          u32 tx_flags)
1823 {
1824         struct ieee80211_local *local = sdata->local;
1825         struct sk_buff *skb;
1826         struct ieee80211_mgmt *mgmt;
1827         bool multi_link = sdata->vif.valid_links;
1828         struct {
1829                 u8 id;
1830                 u8 len;
1831                 u8 ext_id;
1832                 struct ieee80211_multi_link_elem ml;
1833                 struct ieee80211_mle_basic_common_info basic;
1834         } __packed mle = {
1835                 .id = WLAN_EID_EXTENSION,
1836                 .len = sizeof(mle) - 2,
1837                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1838                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1839                 .basic.len = sizeof(mle.basic),
1840         };
1841         int err;
1842
1843         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1844
1845         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1846         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1847                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1848                             multi_link * sizeof(mle));
1849         if (!skb)
1850                 return;
1851
1852         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1853
1854         mgmt = skb_put_zero(skb, 24 + 6);
1855         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1856                                           IEEE80211_STYPE_AUTH);
1857         memcpy(mgmt->da, da, ETH_ALEN);
1858         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1859         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1860         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1861         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1862         mgmt->u.auth.status_code = cpu_to_le16(status);
1863         if (extra)
1864                 skb_put_data(skb, extra, extra_len);
1865         if (multi_link)
1866                 skb_put_data(skb, &mle, sizeof(mle));
1867
1868         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1869                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1870                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1871                 if (WARN_ON(err)) {
1872                         kfree_skb(skb);
1873                         return;
1874                 }
1875         }
1876
1877         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1878                                         tx_flags;
1879         ieee80211_tx_skb(sdata, skb);
1880 }
1881
1882 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1883                                     const u8 *da, const u8 *bssid,
1884                                     u16 stype, u16 reason,
1885                                     bool send_frame, u8 *frame_buf)
1886 {
1887         struct ieee80211_local *local = sdata->local;
1888         struct sk_buff *skb;
1889         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1890
1891         /* build frame */
1892         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1893         mgmt->duration = 0; /* initialize only */
1894         mgmt->seq_ctrl = 0; /* initialize only */
1895         memcpy(mgmt->da, da, ETH_ALEN);
1896         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1897         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1898         /* u.deauth.reason_code == u.disassoc.reason_code */
1899         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1900
1901         if (send_frame) {
1902                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1903                                     IEEE80211_DEAUTH_FRAME_LEN);
1904                 if (!skb)
1905                         return;
1906
1907                 skb_reserve(skb, local->hw.extra_tx_headroom);
1908
1909                 /* copy in frame */
1910                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1911
1912                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1913                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1914                         IEEE80211_SKB_CB(skb)->flags |=
1915                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1916
1917                 ieee80211_tx_skb(sdata, skb);
1918         }
1919 }
1920
1921 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1922 {
1923         if ((end - pos) < 5)
1924                 return pos;
1925
1926         *pos++ = WLAN_EID_EXTENSION;
1927         *pos++ = 1 + sizeof(cap);
1928         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1929         memcpy(pos, &cap, sizeof(cap));
1930
1931         return pos + 2;
1932 }
1933
1934 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1935                                          u8 *buffer, size_t buffer_len,
1936                                          const u8 *ie, size_t ie_len,
1937                                          enum nl80211_band band,
1938                                          u32 rate_mask,
1939                                          struct cfg80211_chan_def *chandef,
1940                                          size_t *offset, u32 flags)
1941 {
1942         struct ieee80211_local *local = sdata->local;
1943         struct ieee80211_supported_band *sband;
1944         const struct ieee80211_sta_he_cap *he_cap;
1945         const struct ieee80211_sta_eht_cap *eht_cap;
1946         u8 *pos = buffer, *end = buffer + buffer_len;
1947         size_t noffset;
1948         int supp_rates_len, i;
1949         u8 rates[32];
1950         int num_rates;
1951         int ext_rates_len;
1952         int shift;
1953         u32 rate_flags;
1954         bool have_80mhz = false;
1955
1956         *offset = 0;
1957
1958         sband = local->hw.wiphy->bands[band];
1959         if (WARN_ON_ONCE(!sband))
1960                 return 0;
1961
1962         rate_flags = ieee80211_chandef_rate_flags(chandef);
1963         shift = ieee80211_chandef_get_shift(chandef);
1964
1965         /* For direct scan add S1G IE and consider its override bits */
1966         if (band == NL80211_BAND_S1GHZ) {
1967                 if (end - pos < 2 + sizeof(struct ieee80211_s1g_cap))
1968                         goto out_err;
1969                 pos = ieee80211_ie_build_s1g_cap(pos, &sband->s1g_cap);
1970                 goto done;
1971         }
1972
1973         num_rates = 0;
1974         for (i = 0; i < sband->n_bitrates; i++) {
1975                 if ((BIT(i) & rate_mask) == 0)
1976                         continue; /* skip rate */
1977                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1978                         continue;
1979
1980                 rates[num_rates++] =
1981                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1982                                           (1 << shift) * 5);
1983         }
1984
1985         supp_rates_len = min_t(int, num_rates, 8);
1986
1987         if (end - pos < 2 + supp_rates_len)
1988                 goto out_err;
1989         *pos++ = WLAN_EID_SUPP_RATES;
1990         *pos++ = supp_rates_len;
1991         memcpy(pos, rates, supp_rates_len);
1992         pos += supp_rates_len;
1993
1994         /* insert "request information" if in custom IEs */
1995         if (ie && ie_len) {
1996                 static const u8 before_extrates[] = {
1997                         WLAN_EID_SSID,
1998                         WLAN_EID_SUPP_RATES,
1999                         WLAN_EID_REQUEST,
2000                 };
2001                 noffset = ieee80211_ie_split(ie, ie_len,
2002                                              before_extrates,
2003                                              ARRAY_SIZE(before_extrates),
2004                                              *offset);
2005                 if (end - pos < noffset - *offset)
2006                         goto out_err;
2007                 memcpy(pos, ie + *offset, noffset - *offset);
2008                 pos += noffset - *offset;
2009                 *offset = noffset;
2010         }
2011
2012         ext_rates_len = num_rates - supp_rates_len;
2013         if (ext_rates_len > 0) {
2014                 if (end - pos < 2 + ext_rates_len)
2015                         goto out_err;
2016                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2017                 *pos++ = ext_rates_len;
2018                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
2019                 pos += ext_rates_len;
2020         }
2021
2022         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
2023                 if (end - pos < 3)
2024                         goto out_err;
2025                 *pos++ = WLAN_EID_DS_PARAMS;
2026                 *pos++ = 1;
2027                 *pos++ = ieee80211_frequency_to_channel(
2028                                 chandef->chan->center_freq);
2029         }
2030
2031         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
2032                 goto done;
2033
2034         /* insert custom IEs that go before HT */
2035         if (ie && ie_len) {
2036                 static const u8 before_ht[] = {
2037                         /*
2038                          * no need to list the ones split off already
2039                          * (or generated here)
2040                          */
2041                         WLAN_EID_DS_PARAMS,
2042                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
2043                 };
2044                 noffset = ieee80211_ie_split(ie, ie_len,
2045                                              before_ht, ARRAY_SIZE(before_ht),
2046                                              *offset);
2047                 if (end - pos < noffset - *offset)
2048                         goto out_err;
2049                 memcpy(pos, ie + *offset, noffset - *offset);
2050                 pos += noffset - *offset;
2051                 *offset = noffset;
2052         }
2053
2054         if (sband->ht_cap.ht_supported) {
2055                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
2056                         goto out_err;
2057                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
2058                                                 sband->ht_cap.cap);
2059         }
2060
2061         /* insert custom IEs that go before VHT */
2062         if (ie && ie_len) {
2063                 static const u8 before_vht[] = {
2064                         /*
2065                          * no need to list the ones split off already
2066                          * (or generated here)
2067                          */
2068                         WLAN_EID_BSS_COEX_2040,
2069                         WLAN_EID_EXT_CAPABILITY,
2070                         WLAN_EID_SSID_LIST,
2071                         WLAN_EID_CHANNEL_USAGE,
2072                         WLAN_EID_INTERWORKING,
2073                         WLAN_EID_MESH_ID,
2074                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
2075                 };
2076                 noffset = ieee80211_ie_split(ie, ie_len,
2077                                              before_vht, ARRAY_SIZE(before_vht),
2078                                              *offset);
2079                 if (end - pos < noffset - *offset)
2080                         goto out_err;
2081                 memcpy(pos, ie + *offset, noffset - *offset);
2082                 pos += noffset - *offset;
2083                 *offset = noffset;
2084         }
2085
2086         /* Check if any channel in this sband supports at least 80 MHz */
2087         for (i = 0; i < sband->n_channels; i++) {
2088                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
2089                                                 IEEE80211_CHAN_NO_80MHZ))
2090                         continue;
2091
2092                 have_80mhz = true;
2093                 break;
2094         }
2095
2096         if (sband->vht_cap.vht_supported && have_80mhz) {
2097                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
2098                         goto out_err;
2099                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
2100                                                  sband->vht_cap.cap);
2101         }
2102
2103         /* insert custom IEs that go before HE */
2104         if (ie && ie_len) {
2105                 static const u8 before_he[] = {
2106                         /*
2107                          * no need to list the ones split off before VHT
2108                          * or generated here
2109                          */
2110                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
2111                         WLAN_EID_AP_CSN,
2112                         /* TODO: add 11ah/11aj/11ak elements */
2113                 };
2114                 noffset = ieee80211_ie_split(ie, ie_len,
2115                                              before_he, ARRAY_SIZE(before_he),
2116                                              *offset);
2117                 if (end - pos < noffset - *offset)
2118                         goto out_err;
2119                 memcpy(pos, ie + *offset, noffset - *offset);
2120                 pos += noffset - *offset;
2121                 *offset = noffset;
2122         }
2123
2124         he_cap = ieee80211_get_he_iftype_cap(sband,
2125                                              ieee80211_vif_type_p2p(&sdata->vif));
2126         if (he_cap &&
2127             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2128                                          IEEE80211_CHAN_NO_HE)) {
2129                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
2130                 if (!pos)
2131                         goto out_err;
2132         }
2133
2134         eht_cap = ieee80211_get_eht_iftype_cap(sband,
2135                                                ieee80211_vif_type_p2p(&sdata->vif));
2136
2137         if (eht_cap &&
2138             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
2139                                          IEEE80211_CHAN_NO_HE |
2140                                          IEEE80211_CHAN_NO_EHT)) {
2141                 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end,
2142                                                  sdata->vif.type == NL80211_IFTYPE_AP);
2143                 if (!pos)
2144                         goto out_err;
2145         }
2146
2147         if (cfg80211_any_usable_channels(local->hw.wiphy,
2148                                          BIT(NL80211_BAND_6GHZ),
2149                                          IEEE80211_CHAN_NO_HE)) {
2150                 struct ieee80211_supported_band *sband6;
2151
2152                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2153                 he_cap = ieee80211_get_he_iftype_cap(sband6,
2154                                 ieee80211_vif_type_p2p(&sdata->vif));
2155
2156                 if (he_cap) {
2157                         enum nl80211_iftype iftype =
2158                                 ieee80211_vif_type_p2p(&sdata->vif);
2159                         __le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype);
2160
2161                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
2162                 }
2163         }
2164
2165         /*
2166          * If adding more here, adjust code in main.c
2167          * that calculates local->scan_ies_len.
2168          */
2169
2170         return pos - buffer;
2171  out_err:
2172         WARN_ONCE(1, "not enough space for preq IEs\n");
2173  done:
2174         return pos - buffer;
2175 }
2176
2177 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2178                              size_t buffer_len,
2179                              struct ieee80211_scan_ies *ie_desc,
2180                              const u8 *ie, size_t ie_len,
2181                              u8 bands_used, u32 *rate_masks,
2182                              struct cfg80211_chan_def *chandef,
2183                              u32 flags)
2184 {
2185         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2186         int i;
2187
2188         memset(ie_desc, 0, sizeof(*ie_desc));
2189
2190         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2191                 if (bands_used & BIT(i)) {
2192                         pos += ieee80211_build_preq_ies_band(sdata,
2193                                                              buffer + pos,
2194                                                              buffer_len - pos,
2195                                                              ie, ie_len, i,
2196                                                              rate_masks[i],
2197                                                              chandef,
2198                                                              &custom_ie_offset,
2199                                                              flags);
2200                         ie_desc->ies[i] = buffer + old_pos;
2201                         ie_desc->len[i] = pos - old_pos;
2202                         old_pos = pos;
2203                 }
2204         }
2205
2206         /* add any remaining custom IEs */
2207         if (ie && ie_len) {
2208                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2209                               "not enough space for preq custom IEs\n"))
2210                         return pos;
2211                 memcpy(buffer + pos, ie + custom_ie_offset,
2212                        ie_len - custom_ie_offset);
2213                 ie_desc->common_ies = buffer + pos;
2214                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2215                 pos += ie_len - custom_ie_offset;
2216         }
2217
2218         return pos;
2219 };
2220
2221 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2222                                           const u8 *src, const u8 *dst,
2223                                           u32 ratemask,
2224                                           struct ieee80211_channel *chan,
2225                                           const u8 *ssid, size_t ssid_len,
2226                                           const u8 *ie, size_t ie_len,
2227                                           u32 flags)
2228 {
2229         struct ieee80211_local *local = sdata->local;
2230         struct cfg80211_chan_def chandef;
2231         struct sk_buff *skb;
2232         struct ieee80211_mgmt *mgmt;
2233         int ies_len;
2234         u32 rate_masks[NUM_NL80211_BANDS] = {};
2235         struct ieee80211_scan_ies dummy_ie_desc;
2236
2237         /*
2238          * Do not send DS Channel parameter for directed probe requests
2239          * in order to maximize the chance that we get a response.  Some
2240          * badly-behaved APs don't respond when this parameter is included.
2241          */
2242         chandef.width = sdata->vif.bss_conf.chandef.width;
2243         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2244                 chandef.chan = NULL;
2245         else
2246                 chandef.chan = chan;
2247
2248         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2249                                      local->scan_ies_len + ie_len);
2250         if (!skb)
2251                 return NULL;
2252
2253         rate_masks[chan->band] = ratemask;
2254         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2255                                            skb_tailroom(skb), &dummy_ie_desc,
2256                                            ie, ie_len, BIT(chan->band),
2257                                            rate_masks, &chandef, flags);
2258         skb_put(skb, ies_len);
2259
2260         if (dst) {
2261                 mgmt = (struct ieee80211_mgmt *) skb->data;
2262                 memcpy(mgmt->da, dst, ETH_ALEN);
2263                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2264         }
2265
2266         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2267
2268         return skb;
2269 }
2270
2271 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2272                             struct ieee802_11_elems *elems,
2273                             enum nl80211_band band, u32 *basic_rates)
2274 {
2275         struct ieee80211_supported_band *sband;
2276         size_t num_rates;
2277         u32 supp_rates, rate_flags;
2278         int i, j, shift;
2279
2280         sband = sdata->local->hw.wiphy->bands[band];
2281         if (WARN_ON(!sband))
2282                 return 1;
2283
2284         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2285         shift = ieee80211_vif_get_shift(&sdata->vif);
2286
2287         num_rates = sband->n_bitrates;
2288         supp_rates = 0;
2289         for (i = 0; i < elems->supp_rates_len +
2290                      elems->ext_supp_rates_len; i++) {
2291                 u8 rate = 0;
2292                 int own_rate;
2293                 bool is_basic;
2294                 if (i < elems->supp_rates_len)
2295                         rate = elems->supp_rates[i];
2296                 else if (elems->ext_supp_rates)
2297                         rate = elems->ext_supp_rates
2298                                 [i - elems->supp_rates_len];
2299                 own_rate = 5 * (rate & 0x7f);
2300                 is_basic = !!(rate & 0x80);
2301
2302                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2303                         continue;
2304
2305                 for (j = 0; j < num_rates; j++) {
2306                         int brate;
2307                         if ((rate_flags & sband->bitrates[j].flags)
2308                             != rate_flags)
2309                                 continue;
2310
2311                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2312                                              1 << shift);
2313
2314                         if (brate == own_rate) {
2315                                 supp_rates |= BIT(j);
2316                                 if (basic_rates && is_basic)
2317                                         *basic_rates |= BIT(j);
2318                         }
2319                 }
2320         }
2321         return supp_rates;
2322 }
2323
2324 void ieee80211_stop_device(struct ieee80211_local *local)
2325 {
2326         ieee80211_led_radio(local, false);
2327         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2328
2329         cancel_work_sync(&local->reconfig_filter);
2330
2331         flush_workqueue(local->workqueue);
2332         drv_stop(local);
2333 }
2334
2335 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2336                                            bool aborted)
2337 {
2338         /* It's possible that we don't handle the scan completion in
2339          * time during suspend, so if it's still marked as completed
2340          * here, queue the work and flush it to clean things up.
2341          * Instead of calling the worker function directly here, we
2342          * really queue it to avoid potential races with other flows
2343          * scheduling the same work.
2344          */
2345         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2346                 /* If coming from reconfiguration failure, abort the scan so
2347                  * we don't attempt to continue a partial HW scan - which is
2348                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2349                  * completed scan, and a 5 GHz portion is still pending.
2350                  */
2351                 if (aborted)
2352                         set_bit(SCAN_ABORTED, &local->scanning);
2353                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2354                 flush_delayed_work(&local->scan_work);
2355         }
2356 }
2357
2358 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2359 {
2360         struct ieee80211_sub_if_data *sdata;
2361         struct ieee80211_chanctx *ctx;
2362
2363         /*
2364          * We get here if during resume the device can't be restarted properly.
2365          * We might also get here if this happens during HW reset, which is a
2366          * slightly different situation and we need to drop all connections in
2367          * the latter case.
2368          *
2369          * Ask cfg80211 to turn off all interfaces, this will result in more
2370          * warnings but at least we'll then get into a clean stopped state.
2371          */
2372
2373         local->resuming = false;
2374         local->suspended = false;
2375         local->in_reconfig = false;
2376
2377         ieee80211_flush_completed_scan(local, true);
2378
2379         /* scheduled scan clearly can't be running any more, but tell
2380          * cfg80211 and clear local state
2381          */
2382         ieee80211_sched_scan_end(local);
2383
2384         list_for_each_entry(sdata, &local->interfaces, list)
2385                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2386
2387         /* Mark channel contexts as not being in the driver any more to avoid
2388          * removing them from the driver during the shutdown process...
2389          */
2390         mutex_lock(&local->chanctx_mtx);
2391         list_for_each_entry(ctx, &local->chanctx_list, list)
2392                 ctx->driver_present = false;
2393         mutex_unlock(&local->chanctx_mtx);
2394 }
2395
2396 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2397                                      struct ieee80211_sub_if_data *sdata,
2398                                      struct ieee80211_link_data *link)
2399 {
2400         struct ieee80211_chanctx_conf *conf;
2401         struct ieee80211_chanctx *ctx;
2402
2403         if (!local->use_chanctx)
2404                 return;
2405
2406         mutex_lock(&local->chanctx_mtx);
2407         conf = rcu_dereference_protected(link->conf->chanctx_conf,
2408                                          lockdep_is_held(&local->chanctx_mtx));
2409         if (conf) {
2410                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2411                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
2412         }
2413         mutex_unlock(&local->chanctx_mtx);
2414 }
2415
2416 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2417 {
2418         struct ieee80211_local *local = sdata->local;
2419         struct sta_info *sta;
2420
2421         /* add STAs back */
2422         mutex_lock(&local->sta_mtx);
2423         list_for_each_entry(sta, &local->sta_list, list) {
2424                 enum ieee80211_sta_state state;
2425
2426                 if (!sta->uploaded || sta->sdata != sdata)
2427                         continue;
2428
2429                 for (state = IEEE80211_STA_NOTEXIST;
2430                      state < sta->sta_state; state++)
2431                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2432                                               state + 1));
2433         }
2434         mutex_unlock(&local->sta_mtx);
2435 }
2436
2437 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2438 {
2439         struct cfg80211_nan_func *func, **funcs;
2440         int res, id, i = 0;
2441
2442         res = drv_start_nan(sdata->local, sdata,
2443                             &sdata->u.nan.conf);
2444         if (WARN_ON(res))
2445                 return res;
2446
2447         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2448                         sizeof(*funcs),
2449                         GFP_KERNEL);
2450         if (!funcs)
2451                 return -ENOMEM;
2452
2453         /* Add all the functions:
2454          * This is a little bit ugly. We need to call a potentially sleeping
2455          * callback for each NAN function, so we can't hold the spinlock.
2456          */
2457         spin_lock_bh(&sdata->u.nan.func_lock);
2458
2459         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2460                 funcs[i++] = func;
2461
2462         spin_unlock_bh(&sdata->u.nan.func_lock);
2463
2464         for (i = 0; funcs[i]; i++) {
2465                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2466                 if (WARN_ON(res))
2467                         ieee80211_nan_func_terminated(&sdata->vif,
2468                                                       funcs[i]->instance_id,
2469                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2470                                                       GFP_KERNEL);
2471         }
2472
2473         kfree(funcs);
2474
2475         return 0;
2476 }
2477
2478 int ieee80211_reconfig(struct ieee80211_local *local)
2479 {
2480         struct ieee80211_hw *hw = &local->hw;
2481         struct ieee80211_sub_if_data *sdata;
2482         struct ieee80211_chanctx *ctx;
2483         struct sta_info *sta;
2484         int res, i;
2485         bool reconfig_due_to_wowlan = false;
2486         struct ieee80211_sub_if_data *sched_scan_sdata;
2487         struct cfg80211_sched_scan_request *sched_scan_req;
2488         bool sched_scan_stopped = false;
2489         bool suspended = local->suspended;
2490         bool in_reconfig = false;
2491
2492         /* nothing to do if HW shouldn't run */
2493         if (!local->open_count)
2494                 goto wake_up;
2495
2496 #ifdef CONFIG_PM
2497         if (suspended)
2498                 local->resuming = true;
2499
2500         if (local->wowlan) {
2501                 /*
2502                  * In the wowlan case, both mac80211 and the device
2503                  * are functional when the resume op is called, so
2504                  * clear local->suspended so the device could operate
2505                  * normally (e.g. pass rx frames).
2506                  */
2507                 local->suspended = false;
2508                 res = drv_resume(local);
2509                 local->wowlan = false;
2510                 if (res < 0) {
2511                         local->resuming = false;
2512                         return res;
2513                 }
2514                 if (res == 0)
2515                         goto wake_up;
2516                 WARN_ON(res > 1);
2517                 /*
2518                  * res is 1, which means the driver requested
2519                  * to go through a regular reset on wakeup.
2520                  * restore local->suspended in this case.
2521                  */
2522                 reconfig_due_to_wowlan = true;
2523                 local->suspended = true;
2524         }
2525 #endif
2526
2527         /*
2528          * In case of hw_restart during suspend (without wowlan),
2529          * cancel restart work, as we are reconfiguring the device
2530          * anyway.
2531          * Note that restart_work is scheduled on a frozen workqueue,
2532          * so we can't deadlock in this case.
2533          */
2534         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2535                 cancel_work_sync(&local->restart_work);
2536
2537         local->started = false;
2538
2539         /*
2540          * Upon resume hardware can sometimes be goofy due to
2541          * various platform / driver / bus issues, so restarting
2542          * the device may at times not work immediately. Propagate
2543          * the error.
2544          */
2545         res = drv_start(local);
2546         if (res) {
2547                 if (suspended)
2548                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2549                 else
2550                         WARN(1, "Hardware became unavailable during restart.\n");
2551                 ieee80211_handle_reconfig_failure(local);
2552                 return res;
2553         }
2554
2555         /* setup fragmentation threshold */
2556         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2557
2558         /* setup RTS threshold */
2559         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2560
2561         /* reset coverage class */
2562         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2563
2564         ieee80211_led_radio(local, true);
2565         ieee80211_mod_tpt_led_trig(local,
2566                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2567
2568         /* add interfaces */
2569         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2570         if (sdata) {
2571                 /* in HW restart it exists already */
2572                 WARN_ON(local->resuming);
2573                 res = drv_add_interface(local, sdata);
2574                 if (WARN_ON(res)) {
2575                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2576                         synchronize_net();
2577                         kfree(sdata);
2578                 }
2579         }
2580
2581         list_for_each_entry(sdata, &local->interfaces, list) {
2582                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2583                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2584                     ieee80211_sdata_running(sdata)) {
2585                         res = drv_add_interface(local, sdata);
2586                         if (WARN_ON(res))
2587                                 break;
2588                 }
2589         }
2590
2591         /* If adding any of the interfaces failed above, roll back and
2592          * report failure.
2593          */
2594         if (res) {
2595                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2596                                                      list)
2597                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2598                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2599                             ieee80211_sdata_running(sdata))
2600                                 drv_remove_interface(local, sdata);
2601                 ieee80211_handle_reconfig_failure(local);
2602                 return res;
2603         }
2604
2605         /* add channel contexts */
2606         if (local->use_chanctx) {
2607                 mutex_lock(&local->chanctx_mtx);
2608                 list_for_each_entry(ctx, &local->chanctx_list, list)
2609                         if (ctx->replace_state !=
2610                             IEEE80211_CHANCTX_REPLACES_OTHER)
2611                                 WARN_ON(drv_add_chanctx(local, ctx));
2612                 mutex_unlock(&local->chanctx_mtx);
2613
2614                 sdata = wiphy_dereference(local->hw.wiphy,
2615                                           local->monitor_sdata);
2616                 if (sdata && ieee80211_sdata_running(sdata))
2617                         ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
2618         }
2619
2620         /* reconfigure hardware */
2621         ieee80211_hw_config(local, ~0);
2622
2623         ieee80211_configure_filter(local);
2624
2625         /* Finally also reconfigure all the BSS information */
2626         list_for_each_entry(sdata, &local->interfaces, list) {
2627                 unsigned int link_id;
2628                 u32 changed;
2629
2630                 if (!ieee80211_sdata_running(sdata))
2631                         continue;
2632
2633                 sdata_lock(sdata);
2634                 for (link_id = 0;
2635                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
2636                      link_id++) {
2637                         struct ieee80211_link_data *link;
2638
2639                         link = sdata_dereference(sdata->link[link_id], sdata);
2640                         if (link)
2641                                 ieee80211_assign_chanctx(local, sdata, link);
2642                 }
2643
2644                 switch (sdata->vif.type) {
2645                 case NL80211_IFTYPE_AP_VLAN:
2646                 case NL80211_IFTYPE_MONITOR:
2647                         break;
2648                 case NL80211_IFTYPE_ADHOC:
2649                         if (sdata->vif.cfg.ibss_joined)
2650                                 WARN_ON(drv_join_ibss(local, sdata));
2651                         fallthrough;
2652                 default:
2653                         ieee80211_reconfig_stations(sdata);
2654                         fallthrough;
2655                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2656                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2657                                 drv_conf_tx(local, &sdata->deflink, i,
2658                                             &sdata->deflink.tx_conf[i]);
2659                         break;
2660                 }
2661                 sdata_unlock(sdata);
2662
2663                 /* common change flags for all interface types */
2664                 changed = BSS_CHANGED_ERP_CTS_PROT |
2665                           BSS_CHANGED_ERP_PREAMBLE |
2666                           BSS_CHANGED_ERP_SLOT |
2667                           BSS_CHANGED_HT |
2668                           BSS_CHANGED_BASIC_RATES |
2669                           BSS_CHANGED_BEACON_INT |
2670                           BSS_CHANGED_BSSID |
2671                           BSS_CHANGED_CQM |
2672                           BSS_CHANGED_QOS |
2673                           BSS_CHANGED_IDLE |
2674                           BSS_CHANGED_TXPOWER |
2675                           BSS_CHANGED_MCAST_RATE;
2676
2677                 if (sdata->vif.bss_conf.mu_mimo_owner)
2678                         changed |= BSS_CHANGED_MU_GROUPS;
2679
2680                 switch (sdata->vif.type) {
2681                 case NL80211_IFTYPE_STATION:
2682                         changed |= BSS_CHANGED_ASSOC |
2683                                    BSS_CHANGED_ARP_FILTER |
2684                                    BSS_CHANGED_PS;
2685
2686                         /* Re-send beacon info report to the driver */
2687                         if (sdata->deflink.u.mgd.have_beacon)
2688                                 changed |= BSS_CHANGED_BEACON_INFO;
2689
2690                         if (sdata->vif.bss_conf.max_idle_period ||
2691                             sdata->vif.bss_conf.protected_keep_alive)
2692                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2693
2694                         sdata_lock(sdata);
2695                         ieee80211_bss_info_change_notify(sdata, changed);
2696                         sdata_unlock(sdata);
2697                         break;
2698                 case NL80211_IFTYPE_OCB:
2699                         changed |= BSS_CHANGED_OCB;
2700                         ieee80211_bss_info_change_notify(sdata, changed);
2701                         break;
2702                 case NL80211_IFTYPE_ADHOC:
2703                         changed |= BSS_CHANGED_IBSS;
2704                         fallthrough;
2705                 case NL80211_IFTYPE_AP:
2706                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2707
2708                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2709                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2710                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2711                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2712
2713                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2714                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2715
2716                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2717                                         drv_start_ap(local, sdata,
2718                                                      sdata->deflink.conf);
2719                         }
2720                         fallthrough;
2721                 case NL80211_IFTYPE_MESH_POINT:
2722                         if (sdata->vif.bss_conf.enable_beacon) {
2723                                 changed |= BSS_CHANGED_BEACON |
2724                                            BSS_CHANGED_BEACON_ENABLED;
2725                                 ieee80211_bss_info_change_notify(sdata, changed);
2726                         }
2727                         break;
2728                 case NL80211_IFTYPE_NAN:
2729                         res = ieee80211_reconfig_nan(sdata);
2730                         if (res < 0) {
2731                                 ieee80211_handle_reconfig_failure(local);
2732                                 return res;
2733                         }
2734                         break;
2735                 case NL80211_IFTYPE_AP_VLAN:
2736                 case NL80211_IFTYPE_MONITOR:
2737                 case NL80211_IFTYPE_P2P_DEVICE:
2738                         /* nothing to do */
2739                         break;
2740                 case NL80211_IFTYPE_UNSPECIFIED:
2741                 case NUM_NL80211_IFTYPES:
2742                 case NL80211_IFTYPE_P2P_CLIENT:
2743                 case NL80211_IFTYPE_P2P_GO:
2744                 case NL80211_IFTYPE_WDS:
2745                         WARN_ON(1);
2746                         break;
2747                 }
2748         }
2749
2750         ieee80211_recalc_ps(local);
2751
2752         /*
2753          * The sta might be in psm against the ap (e.g. because
2754          * this was the state before a hw restart), so we
2755          * explicitly send a null packet in order to make sure
2756          * it'll sync against the ap (and get out of psm).
2757          */
2758         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2759                 list_for_each_entry(sdata, &local->interfaces, list) {
2760                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2761                                 continue;
2762                         if (!sdata->u.mgd.associated)
2763                                 continue;
2764
2765                         ieee80211_send_nullfunc(local, sdata, false);
2766                 }
2767         }
2768
2769         /* APs are now beaconing, add back stations */
2770         list_for_each_entry(sdata, &local->interfaces, list) {
2771                 if (!ieee80211_sdata_running(sdata))
2772                         continue;
2773
2774                 sdata_lock(sdata);
2775                 switch (sdata->vif.type) {
2776                 case NL80211_IFTYPE_AP_VLAN:
2777                 case NL80211_IFTYPE_AP:
2778                         ieee80211_reconfig_stations(sdata);
2779                         break;
2780                 default:
2781                         break;
2782                 }
2783                 sdata_unlock(sdata);
2784         }
2785
2786         /* add back keys */
2787         list_for_each_entry(sdata, &local->interfaces, list)
2788                 ieee80211_reenable_keys(sdata);
2789
2790         /* Reconfigure sched scan if it was interrupted by FW restart */
2791         mutex_lock(&local->mtx);
2792         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2793                                                 lockdep_is_held(&local->mtx));
2794         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2795                                                 lockdep_is_held(&local->mtx));
2796         if (sched_scan_sdata && sched_scan_req)
2797                 /*
2798                  * Sched scan stopped, but we don't want to report it. Instead,
2799                  * we're trying to reschedule. However, if more than one scan
2800                  * plan was set, we cannot reschedule since we don't know which
2801                  * scan plan was currently running (and some scan plans may have
2802                  * already finished).
2803                  */
2804                 if (sched_scan_req->n_scan_plans > 1 ||
2805                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2806                                                          sched_scan_req)) {
2807                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2808                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2809                         sched_scan_stopped = true;
2810                 }
2811         mutex_unlock(&local->mtx);
2812
2813         if (sched_scan_stopped)
2814                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2815
2816  wake_up:
2817
2818         if (local->monitors == local->open_count && local->monitors > 0)
2819                 ieee80211_add_virtual_monitor(local);
2820
2821         /*
2822          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2823          * sessions can be established after a resume.
2824          *
2825          * Also tear down aggregation sessions since reconfiguring
2826          * them in a hardware restart scenario is not easily done
2827          * right now, and the hardware will have lost information
2828          * about the sessions, but we and the AP still think they
2829          * are active. This is really a workaround though.
2830          */
2831         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2832                 mutex_lock(&local->sta_mtx);
2833
2834                 list_for_each_entry(sta, &local->sta_list, list) {
2835                         if (!local->resuming)
2836                                 ieee80211_sta_tear_down_BA_sessions(
2837                                                 sta, AGG_STOP_LOCAL_REQUEST);
2838                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2839                 }
2840
2841                 mutex_unlock(&local->sta_mtx);
2842         }
2843
2844         /*
2845          * If this is for hw restart things are still running.
2846          * We may want to change that later, however.
2847          */
2848         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2849                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2850
2851         if (local->in_reconfig) {
2852                 in_reconfig = local->in_reconfig;
2853                 local->in_reconfig = false;
2854                 barrier();
2855
2856                 /* Restart deferred ROCs */
2857                 mutex_lock(&local->mtx);
2858                 ieee80211_start_next_roc(local);
2859                 mutex_unlock(&local->mtx);
2860
2861                 /* Requeue all works */
2862                 list_for_each_entry(sdata, &local->interfaces, list)
2863                         ieee80211_queue_work(&local->hw, &sdata->work);
2864         }
2865
2866         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2867                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2868                                         false);
2869
2870         if (in_reconfig) {
2871                 list_for_each_entry(sdata, &local->interfaces, list) {
2872                         if (!ieee80211_sdata_running(sdata))
2873                                 continue;
2874                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2875                                 ieee80211_sta_restart(sdata);
2876                 }
2877         }
2878
2879         if (!suspended)
2880                 return 0;
2881
2882 #ifdef CONFIG_PM
2883         /* first set suspended false, then resuming */
2884         local->suspended = false;
2885         mb();
2886         local->resuming = false;
2887
2888         ieee80211_flush_completed_scan(local, false);
2889
2890         if (local->open_count && !reconfig_due_to_wowlan)
2891                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2892
2893         list_for_each_entry(sdata, &local->interfaces, list) {
2894                 if (!ieee80211_sdata_running(sdata))
2895                         continue;
2896                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2897                         ieee80211_sta_restart(sdata);
2898         }
2899
2900         mod_timer(&local->sta_cleanup, jiffies + 1);
2901 #else
2902         WARN_ON(1);
2903 #endif
2904
2905         return 0;
2906 }
2907
2908 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2909 {
2910         struct ieee80211_sub_if_data *sdata;
2911         struct ieee80211_local *local;
2912         struct ieee80211_key *key;
2913
2914         if (WARN_ON(!vif))
2915                 return;
2916
2917         sdata = vif_to_sdata(vif);
2918         local = sdata->local;
2919
2920         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2921                     !local->resuming))
2922                 return;
2923
2924         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2925                     !local->in_reconfig))
2926                 return;
2927
2928         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2929                 return;
2930
2931         sdata->flags |= flag;
2932
2933         mutex_lock(&local->key_mtx);
2934         list_for_each_entry(key, &sdata->key_list, list)
2935                 key->flags |= KEY_FLAG_TAINTED;
2936         mutex_unlock(&local->key_mtx);
2937 }
2938
2939 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2940 {
2941         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2942 }
2943 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2944
2945 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2946 {
2947         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2948 }
2949 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2950
2951 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2952                            struct ieee80211_link_data *link)
2953 {
2954         struct ieee80211_local *local = sdata->local;
2955         struct ieee80211_chanctx_conf *chanctx_conf;
2956         struct ieee80211_chanctx *chanctx;
2957
2958         mutex_lock(&local->chanctx_mtx);
2959
2960         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2961                                                  lockdep_is_held(&local->chanctx_mtx));
2962
2963         /*
2964          * This function can be called from a work, thus it may be possible
2965          * that the chanctx_conf is removed (due to a disconnection, for
2966          * example).
2967          * So nothing should be done in such case.
2968          */
2969         if (!chanctx_conf)
2970                 goto unlock;
2971
2972         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2973         ieee80211_recalc_smps_chanctx(local, chanctx);
2974  unlock:
2975         mutex_unlock(&local->chanctx_mtx);
2976 }
2977
2978 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2979                                   int link_id)
2980 {
2981         struct ieee80211_local *local = sdata->local;
2982         struct ieee80211_chanctx_conf *chanctx_conf;
2983         struct ieee80211_chanctx *chanctx;
2984         int i;
2985
2986         mutex_lock(&local->chanctx_mtx);
2987
2988         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2989                 struct ieee80211_bss_conf *bss_conf;
2990
2991                 if (link_id >= 0 && link_id != i)
2992                         continue;
2993
2994                 rcu_read_lock();
2995                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2996                 if (!bss_conf) {
2997                         rcu_read_unlock();
2998                         continue;
2999                 }
3000
3001                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
3002                                                          lockdep_is_held(&local->chanctx_mtx));
3003                 /*
3004                  * Since we hold the chanctx_mtx (checked above)
3005                  * we can take the chanctx_conf pointer out of the
3006                  * RCU critical section, it cannot go away without
3007                  * the mutex. Just the way we reached it could - in
3008                  * theory - go away, but we don't really care and
3009                  * it really shouldn't happen anyway.
3010                  */
3011                 rcu_read_unlock();
3012
3013                 if (!chanctx_conf)
3014                         goto unlock;
3015
3016                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
3017                                        conf);
3018                 ieee80211_recalc_chanctx_min_def(local, chanctx);
3019         }
3020  unlock:
3021         mutex_unlock(&local->chanctx_mtx);
3022 }
3023
3024 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
3025 {
3026         size_t pos = offset;
3027
3028         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
3029                 pos += 2 + ies[pos + 1];
3030
3031         return pos;
3032 }
3033
3034 u8 *ieee80211_ie_build_s1g_cap(u8 *pos, struct ieee80211_sta_s1g_cap *s1g_cap)
3035 {
3036         *pos++ = WLAN_EID_S1G_CAPABILITIES;
3037         *pos++ = sizeof(struct ieee80211_s1g_cap);
3038         memset(pos, 0, sizeof(struct ieee80211_s1g_cap));
3039
3040         memcpy(pos, &s1g_cap->cap, sizeof(s1g_cap->cap));
3041         pos += sizeof(s1g_cap->cap);
3042
3043         memcpy(pos, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
3044         pos += sizeof(s1g_cap->nss_mcs);
3045
3046         return pos;
3047 }
3048
3049 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3050                               u16 cap)
3051 {
3052         __le16 tmp;
3053
3054         *pos++ = WLAN_EID_HT_CAPABILITY;
3055         *pos++ = sizeof(struct ieee80211_ht_cap);
3056         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
3057
3058         /* capability flags */
3059         tmp = cpu_to_le16(cap);
3060         memcpy(pos, &tmp, sizeof(u16));
3061         pos += sizeof(u16);
3062
3063         /* AMPDU parameters */
3064         *pos++ = ht_cap->ampdu_factor |
3065                  (ht_cap->ampdu_density <<
3066                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
3067
3068         /* MCS set */
3069         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
3070         pos += sizeof(ht_cap->mcs);
3071
3072         /* extended capabilities */
3073         pos += sizeof(__le16);
3074
3075         /* BF capabilities */
3076         pos += sizeof(__le32);
3077
3078         /* antenna selection */
3079         pos += sizeof(u8);
3080
3081         return pos;
3082 }
3083
3084 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3085                                u32 cap)
3086 {
3087         __le32 tmp;
3088
3089         *pos++ = WLAN_EID_VHT_CAPABILITY;
3090         *pos++ = sizeof(struct ieee80211_vht_cap);
3091         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
3092
3093         /* capability flags */
3094         tmp = cpu_to_le32(cap);
3095         memcpy(pos, &tmp, sizeof(u32));
3096         pos += sizeof(u32);
3097
3098         /* VHT MCS set */
3099         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
3100         pos += sizeof(vht_cap->vht_mcs);
3101
3102         return pos;
3103 }
3104
3105 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
3106 {
3107         const struct ieee80211_sta_he_cap *he_cap;
3108         struct ieee80211_supported_band *sband;
3109         u8 n;
3110
3111         sband = ieee80211_get_sband(sdata);
3112         if (!sband)
3113                 return 0;
3114
3115         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3116         if (!he_cap)
3117                 return 0;
3118
3119         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
3120         return 2 + 1 +
3121                sizeof(he_cap->he_cap_elem) + n +
3122                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3123                                      he_cap->he_cap_elem.phy_cap_info);
3124 }
3125
3126 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos,
3127                               const struct ieee80211_sta_he_cap *he_cap,
3128                               u8 *end)
3129 {
3130         struct ieee80211_he_cap_elem elem;
3131         u8 n;
3132         u8 ie_len;
3133         u8 *orig_pos = pos;
3134
3135         /* Make sure we have place for the IE */
3136         /*
3137          * TODO: the 1 added is because this temporarily is under the EXTENSION
3138          * IE. Get rid of it when it moves.
3139          */
3140         if (!he_cap)
3141                 return orig_pos;
3142
3143         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
3144         elem = he_cap->he_cap_elem;
3145
3146         if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ)
3147                 elem.phy_cap_info[0] &=
3148                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
3149                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
3150
3151         if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ)
3152                 elem.phy_cap_info[0] &=
3153                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3154
3155         if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ)
3156                 elem.phy_cap_info[0] &=
3157                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3158
3159         n = ieee80211_he_mcs_nss_size(&elem);
3160         ie_len = 2 + 1 +
3161                  sizeof(he_cap->he_cap_elem) + n +
3162                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
3163                                        he_cap->he_cap_elem.phy_cap_info);
3164
3165         if ((end - pos) < ie_len)
3166                 return orig_pos;
3167
3168         *pos++ = WLAN_EID_EXTENSION;
3169         pos++; /* We'll set the size later below */
3170         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
3171
3172         /* Fixed data */
3173         memcpy(pos, &elem, sizeof(elem));
3174         pos += sizeof(elem);
3175
3176         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
3177         pos += n;
3178
3179         /* Check if PPE Threshold should be present */
3180         if ((he_cap->he_cap_elem.phy_cap_info[6] &
3181              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
3182                 goto end;
3183
3184         /*
3185          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
3186          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
3187          */
3188         n = hweight8(he_cap->ppe_thres[0] &
3189                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
3190         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
3191                    IEEE80211_PPE_THRES_NSS_POS));
3192
3193         /*
3194          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
3195          * total size.
3196          */
3197         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
3198         n = DIV_ROUND_UP(n, 8);
3199
3200         /* Copy PPE Thresholds */
3201         memcpy(pos, &he_cap->ppe_thres, n);
3202         pos += n;
3203
3204 end:
3205         orig_pos[1] = (pos - orig_pos) - 2;
3206         return pos;
3207 }
3208
3209 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
3210                                     enum ieee80211_smps_mode smps_mode,
3211                                     struct sk_buff *skb)
3212 {
3213         struct ieee80211_supported_band *sband;
3214         const struct ieee80211_sband_iftype_data *iftd;
3215         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3216         u8 *pos;
3217         u16 cap;
3218
3219         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3220                                           BIT(NL80211_BAND_6GHZ),
3221                                           IEEE80211_CHAN_NO_HE))
3222                 return;
3223
3224         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3225
3226         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3227         if (!iftd)
3228                 return;
3229
3230         /* Check for device HE 6 GHz capability before adding element */
3231         if (!iftd->he_6ghz_capa.capa)
3232                 return;
3233
3234         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3235         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3236
3237         switch (smps_mode) {
3238         case IEEE80211_SMPS_AUTOMATIC:
3239         case IEEE80211_SMPS_NUM_MODES:
3240                 WARN_ON(1);
3241                 fallthrough;
3242         case IEEE80211_SMPS_OFF:
3243                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3244                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3245                 break;
3246         case IEEE80211_SMPS_STATIC:
3247                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3248                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3249                 break;
3250         case IEEE80211_SMPS_DYNAMIC:
3251                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3252                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3253                 break;
3254         }
3255
3256         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3257         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3258                                     pos + 2 + 1 + sizeof(cap));
3259 }
3260
3261 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3262                                const struct cfg80211_chan_def *chandef,
3263                                u16 prot_mode, bool rifs_mode)
3264 {
3265         struct ieee80211_ht_operation *ht_oper;
3266         /* Build HT Information */
3267         *pos++ = WLAN_EID_HT_OPERATION;
3268         *pos++ = sizeof(struct ieee80211_ht_operation);
3269         ht_oper = (struct ieee80211_ht_operation *)pos;
3270         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3271                                         chandef->chan->center_freq);
3272         switch (chandef->width) {
3273         case NL80211_CHAN_WIDTH_160:
3274         case NL80211_CHAN_WIDTH_80P80:
3275         case NL80211_CHAN_WIDTH_80:
3276         case NL80211_CHAN_WIDTH_40:
3277                 if (chandef->center_freq1 > chandef->chan->center_freq)
3278                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3279                 else
3280                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3281                 break;
3282         case NL80211_CHAN_WIDTH_320:
3283                 /* HT information element should not be included on 6GHz */
3284                 WARN_ON(1);
3285                 return pos;
3286         default:
3287                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3288                 break;
3289         }
3290         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3291             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3292             chandef->width != NL80211_CHAN_WIDTH_20)
3293                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3294
3295         if (rifs_mode)
3296                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3297
3298         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3299         ht_oper->stbc_param = 0x0000;
3300
3301         /* It seems that Basic MCS set and Supported MCS set
3302            are identical for the first 10 bytes */
3303         memset(&ht_oper->basic_set, 0, 16);
3304         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3305
3306         return pos + sizeof(struct ieee80211_ht_operation);
3307 }
3308
3309 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3310                                    const struct cfg80211_chan_def *chandef)
3311 {
3312         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3313         *pos++ = 3;                                     /* IE length */
3314         /* New channel width */
3315         switch (chandef->width) {
3316         case NL80211_CHAN_WIDTH_80:
3317                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3318                 break;
3319         case NL80211_CHAN_WIDTH_160:
3320                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3321                 break;
3322         case NL80211_CHAN_WIDTH_80P80:
3323                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3324                 break;
3325         case NL80211_CHAN_WIDTH_320:
3326                 /* The behavior is not defined for 320 MHz channels */
3327                 WARN_ON(1);
3328                 fallthrough;
3329         default:
3330                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3331         }
3332
3333         /* new center frequency segment 0 */
3334         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3335         /* new center frequency segment 1 */
3336         if (chandef->center_freq2)
3337                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3338         else
3339                 *pos++ = 0;
3340 }
3341
3342 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3343                                 const struct cfg80211_chan_def *chandef)
3344 {
3345         struct ieee80211_vht_operation *vht_oper;
3346
3347         *pos++ = WLAN_EID_VHT_OPERATION;
3348         *pos++ = sizeof(struct ieee80211_vht_operation);
3349         vht_oper = (struct ieee80211_vht_operation *)pos;
3350         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3351                                                         chandef->center_freq1);
3352         if (chandef->center_freq2)
3353                 vht_oper->center_freq_seg1_idx =
3354                         ieee80211_frequency_to_channel(chandef->center_freq2);
3355         else
3356                 vht_oper->center_freq_seg1_idx = 0x00;
3357
3358         switch (chandef->width) {
3359         case NL80211_CHAN_WIDTH_160:
3360                 /*
3361                  * Convert 160 MHz channel width to new style as interop
3362                  * workaround.
3363                  */
3364                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3365                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3366                 if (chandef->chan->center_freq < chandef->center_freq1)
3367                         vht_oper->center_freq_seg0_idx -= 8;
3368                 else
3369                         vht_oper->center_freq_seg0_idx += 8;
3370                 break;
3371         case NL80211_CHAN_WIDTH_80P80:
3372                 /*
3373                  * Convert 80+80 MHz channel width to new style as interop
3374                  * workaround.
3375                  */
3376                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3377                 break;
3378         case NL80211_CHAN_WIDTH_80:
3379                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3380                 break;
3381         case NL80211_CHAN_WIDTH_320:
3382                 /* VHT information element should not be included on 6GHz */
3383                 WARN_ON(1);
3384                 return pos;
3385         default:
3386                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3387                 break;
3388         }
3389
3390         /* don't require special VHT peer rates */
3391         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3392
3393         return pos + sizeof(struct ieee80211_vht_operation);
3394 }
3395
3396 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3397 {
3398         struct ieee80211_he_operation *he_oper;
3399         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3400         u32 he_oper_params;
3401         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3402
3403         if (chandef->chan->band == NL80211_BAND_6GHZ)
3404                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3405
3406         *pos++ = WLAN_EID_EXTENSION;
3407         *pos++ = ie_len;
3408         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3409
3410         he_oper_params = 0;
3411         he_oper_params |= u32_encode_bits(1023, /* disabled */
3412                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3413         he_oper_params |= u32_encode_bits(1,
3414                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3415         he_oper_params |= u32_encode_bits(1,
3416                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3417         if (chandef->chan->band == NL80211_BAND_6GHZ)
3418                 he_oper_params |= u32_encode_bits(1,
3419                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3420
3421         he_oper = (struct ieee80211_he_operation *)pos;
3422         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3423
3424         /* don't require special HE peer rates */
3425         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3426         pos += sizeof(struct ieee80211_he_operation);
3427
3428         if (chandef->chan->band != NL80211_BAND_6GHZ)
3429                 goto out;
3430
3431         /* TODO add VHT operational */
3432         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3433         he_6ghz_op->minrate = 6; /* 6 Mbps */
3434         he_6ghz_op->primary =
3435                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3436         he_6ghz_op->ccfs0 =
3437                 ieee80211_frequency_to_channel(chandef->center_freq1);
3438         if (chandef->center_freq2)
3439                 he_6ghz_op->ccfs1 =
3440                         ieee80211_frequency_to_channel(chandef->center_freq2);
3441         else
3442                 he_6ghz_op->ccfs1 = 0;
3443
3444         switch (chandef->width) {
3445         case NL80211_CHAN_WIDTH_320:
3446                 /*
3447                  * TODO: mesh operation is not defined over 6GHz 320 MHz
3448                  * channels.
3449                  */
3450                 WARN_ON(1);
3451                 break;
3452         case NL80211_CHAN_WIDTH_160:
3453                 /* Convert 160 MHz channel width to new style as interop
3454                  * workaround.
3455                  */
3456                 he_6ghz_op->control =
3457                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3458                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3459                 if (chandef->chan->center_freq < chandef->center_freq1)
3460                         he_6ghz_op->ccfs0 -= 8;
3461                 else
3462                         he_6ghz_op->ccfs0 += 8;
3463                 fallthrough;
3464         case NL80211_CHAN_WIDTH_80P80:
3465                 he_6ghz_op->control =
3466                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3467                 break;
3468         case NL80211_CHAN_WIDTH_80:
3469                 he_6ghz_op->control =
3470                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3471                 break;
3472         case NL80211_CHAN_WIDTH_40:
3473                 he_6ghz_op->control =
3474                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3475                 break;
3476         default:
3477                 he_6ghz_op->control =
3478                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3479                 break;
3480         }
3481
3482         pos += sizeof(struct ieee80211_he_6ghz_oper);
3483
3484 out:
3485         return pos;
3486 }
3487
3488 u8 *ieee80211_ie_build_eht_oper(u8 *pos, struct cfg80211_chan_def *chandef,
3489                                 const struct ieee80211_sta_eht_cap *eht_cap)
3490
3491 {
3492         const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
3493                                         &eht_cap->eht_mcs_nss_supp.only_20mhz;
3494         struct ieee80211_eht_operation *eht_oper;
3495         struct ieee80211_eht_operation_info *eht_oper_info;
3496         u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
3497         u8 eht_oper_info_len =
3498                 offsetof(struct ieee80211_eht_operation_info, optional);
3499         u8 chan_width = 0;
3500
3501         *pos++ = WLAN_EID_EXTENSION;
3502         *pos++ = 1 + eht_oper_len + eht_oper_info_len;
3503         *pos++ = WLAN_EID_EXT_EHT_OPERATION;
3504
3505         eht_oper = (struct ieee80211_eht_operation *)pos;
3506
3507         memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
3508         eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
3509         pos += eht_oper_len;
3510
3511         eht_oper_info =
3512                 (struct ieee80211_eht_operation_info *)eht_oper->optional;
3513
3514         eht_oper_info->ccfs0 =
3515                 ieee80211_frequency_to_channel(chandef->center_freq1);
3516         if (chandef->center_freq2)
3517                 eht_oper_info->ccfs1 =
3518                         ieee80211_frequency_to_channel(chandef->center_freq2);
3519         else
3520                 eht_oper_info->ccfs1 = 0;
3521
3522         switch (chandef->width) {
3523         case NL80211_CHAN_WIDTH_320:
3524                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
3525                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
3526                 if (chandef->chan->center_freq < chandef->center_freq1)
3527                         eht_oper_info->ccfs0 -= 16;
3528                 else
3529                         eht_oper_info->ccfs0 += 16;
3530                 break;
3531         case NL80211_CHAN_WIDTH_160:
3532                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
3533                 if (chandef->chan->center_freq < chandef->center_freq1)
3534                         eht_oper_info->ccfs0 -= 8;
3535                 else
3536                         eht_oper_info->ccfs0 += 8;
3537                 fallthrough;
3538         case NL80211_CHAN_WIDTH_80P80:
3539                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
3540                 break;
3541         case NL80211_CHAN_WIDTH_80:
3542                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
3543                 break;
3544         case NL80211_CHAN_WIDTH_40:
3545                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
3546                 break;
3547         default:
3548                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
3549                 break;
3550         }
3551         eht_oper_info->control = chan_width;
3552         pos += eht_oper_info_len;
3553
3554         /* TODO: eht_oper_info->optional */
3555
3556         return pos;
3557 }
3558
3559 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3560                                struct cfg80211_chan_def *chandef)
3561 {
3562         enum nl80211_channel_type channel_type;
3563
3564         if (!ht_oper)
3565                 return false;
3566
3567         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3568         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3569                 channel_type = NL80211_CHAN_HT20;
3570                 break;
3571         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3572                 channel_type = NL80211_CHAN_HT40PLUS;
3573                 break;
3574         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3575                 channel_type = NL80211_CHAN_HT40MINUS;
3576                 break;
3577         default:
3578                 return false;
3579         }
3580
3581         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3582         return true;
3583 }
3584
3585 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3586                                 const struct ieee80211_vht_operation *oper,
3587                                 const struct ieee80211_ht_operation *htop,
3588                                 struct cfg80211_chan_def *chandef)
3589 {
3590         struct cfg80211_chan_def new = *chandef;
3591         int cf0, cf1;
3592         int ccfs0, ccfs1, ccfs2;
3593         int ccf0, ccf1;
3594         u32 vht_cap;
3595         bool support_80_80 = false;
3596         bool support_160 = false;
3597         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3598                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3599         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3600                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3601
3602         if (!oper || !htop)
3603                 return false;
3604
3605         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3606         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3607                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3608         support_80_80 = ((vht_cap &
3609                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3610                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3611                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3612                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3613                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3614         ccfs0 = oper->center_freq_seg0_idx;
3615         ccfs1 = oper->center_freq_seg1_idx;
3616         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3617                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3618                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3619
3620         ccf0 = ccfs0;
3621
3622         /* if not supported, parse as though we didn't understand it */
3623         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3624                 ext_nss_bw_supp = 0;
3625
3626         /*
3627          * Cf. IEEE 802.11 Table 9-250
3628          *
3629          * We really just consider that because it's inefficient to connect
3630          * at a higher bandwidth than we'll actually be able to use.
3631          */
3632         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3633         default:
3634         case 0x00:
3635                 ccf1 = 0;
3636                 support_160 = false;
3637                 support_80_80 = false;
3638                 break;
3639         case 0x01:
3640                 support_80_80 = false;
3641                 fallthrough;
3642         case 0x02:
3643         case 0x03:
3644                 ccf1 = ccfs2;
3645                 break;
3646         case 0x10:
3647                 ccf1 = ccfs1;
3648                 break;
3649         case 0x11:
3650         case 0x12:
3651                 if (!ccfs1)
3652                         ccf1 = ccfs2;
3653                 else
3654                         ccf1 = ccfs1;
3655                 break;
3656         case 0x13:
3657         case 0x20:
3658         case 0x23:
3659                 ccf1 = ccfs1;
3660                 break;
3661         }
3662
3663         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3664         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3665
3666         switch (oper->chan_width) {
3667         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3668                 /* just use HT information directly */
3669                 break;
3670         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3671                 new.width = NL80211_CHAN_WIDTH_80;
3672                 new.center_freq1 = cf0;
3673                 /* If needed, adjust based on the newer interop workaround. */
3674                 if (ccf1) {
3675                         unsigned int diff;
3676
3677                         diff = abs(ccf1 - ccf0);
3678                         if ((diff == 8) && support_160) {
3679                                 new.width = NL80211_CHAN_WIDTH_160;
3680                                 new.center_freq1 = cf1;
3681                         } else if ((diff > 8) && support_80_80) {
3682                                 new.width = NL80211_CHAN_WIDTH_80P80;
3683                                 new.center_freq2 = cf1;
3684                         }
3685                 }
3686                 break;
3687         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3688                 /* deprecated encoding */
3689                 new.width = NL80211_CHAN_WIDTH_160;
3690                 new.center_freq1 = cf0;
3691                 break;
3692         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3693                 /* deprecated encoding */
3694                 new.width = NL80211_CHAN_WIDTH_80P80;
3695                 new.center_freq1 = cf0;
3696                 new.center_freq2 = cf1;
3697                 break;
3698         default:
3699                 return false;
3700         }
3701
3702         if (!cfg80211_chandef_valid(&new))
3703                 return false;
3704
3705         *chandef = new;
3706         return true;
3707 }
3708
3709 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper,
3710                                 bool support_160, bool support_320,
3711                                 struct cfg80211_chan_def *chandef)
3712 {
3713         struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional;
3714
3715         chandef->center_freq1 =
3716                 ieee80211_channel_to_frequency(info->ccfs0,
3717                                                chandef->chan->band);
3718
3719         switch (u8_get_bits(info->control,
3720                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3721         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3722                 chandef->width = NL80211_CHAN_WIDTH_20;
3723                 break;
3724         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3725                 chandef->width = NL80211_CHAN_WIDTH_40;
3726                 break;
3727         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3728                 chandef->width = NL80211_CHAN_WIDTH_80;
3729                 break;
3730         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3731                 if (support_160) {
3732                         chandef->width = NL80211_CHAN_WIDTH_160;
3733                         chandef->center_freq1 =
3734                                 ieee80211_channel_to_frequency(info->ccfs1,
3735                                                                chandef->chan->band);
3736                 } else {
3737                         chandef->width = NL80211_CHAN_WIDTH_80;
3738                 }
3739                 break;
3740         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3741                 if (support_320) {
3742                         chandef->width = NL80211_CHAN_WIDTH_320;
3743                         chandef->center_freq1 =
3744                                 ieee80211_channel_to_frequency(info->ccfs1,
3745                                                                chandef->chan->band);
3746                 } else if (support_160) {
3747                         chandef->width = NL80211_CHAN_WIDTH_160;
3748                 } else {
3749                         chandef->width = NL80211_CHAN_WIDTH_80;
3750
3751                         if (chandef->center_freq1 > chandef->chan->center_freq)
3752                                 chandef->center_freq1 -= 40;
3753                         else
3754                                 chandef->center_freq1 += 40;
3755                 }
3756                 break;
3757         }
3758 }
3759
3760 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3761                                     const struct ieee80211_he_operation *he_oper,
3762                                     const struct ieee80211_eht_operation *eht_oper,
3763                                     struct cfg80211_chan_def *chandef)
3764 {
3765         struct ieee80211_local *local = sdata->local;
3766         struct ieee80211_supported_band *sband;
3767         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3768         const struct ieee80211_sta_he_cap *he_cap;
3769         const struct ieee80211_sta_eht_cap *eht_cap;
3770         struct cfg80211_chan_def he_chandef = *chandef;
3771         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3772         struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
3773         bool support_80_80, support_160, support_320;
3774         u8 he_phy_cap, eht_phy_cap;
3775         u32 freq;
3776
3777         if (chandef->chan->band != NL80211_BAND_6GHZ)
3778                 return true;
3779
3780         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3781
3782         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3783         if (!he_cap) {
3784                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3785                 return false;
3786         }
3787
3788         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3789         support_160 =
3790                 he_phy_cap &
3791                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3792         support_80_80 =
3793                 he_phy_cap &
3794                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3795
3796         if (!he_oper) {
3797                 sdata_info(sdata,
3798                            "HE is not advertised on (on %d MHz), expect issues\n",
3799                            chandef->chan->center_freq);
3800                 return false;
3801         }
3802
3803         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
3804         if (!eht_cap) {
3805                 sdata_info(sdata, "Missing iftype sband data/EHT cap");
3806                 eht_oper = NULL;
3807         }
3808
3809         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3810
3811         if (!he_6ghz_oper) {
3812                 sdata_info(sdata,
3813                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3814                            chandef->chan->center_freq);
3815                 return false;
3816         }
3817
3818         /*
3819          * The EHT operation IE does not contain the primary channel so the
3820          * primary channel frequency should be taken from the 6 GHz operation
3821          * information.
3822          */
3823         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3824                                               NL80211_BAND_6GHZ);
3825         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3826
3827         switch (u8_get_bits(he_6ghz_oper->control,
3828                             IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
3829         case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
3830                 bss_conf->power_type = IEEE80211_REG_LPI_AP;
3831                 break;
3832         case IEEE80211_6GHZ_CTRL_REG_SP_AP:
3833                 bss_conf->power_type = IEEE80211_REG_SP_AP;
3834                 break;
3835         default:
3836                 bss_conf->power_type = IEEE80211_REG_UNSET_AP;
3837                 break;
3838         }
3839
3840         if (!eht_oper ||
3841             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3842                 switch (u8_get_bits(he_6ghz_oper->control,
3843                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3844                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3845                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3846                         break;
3847                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3848                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3849                         break;
3850                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3851                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3852                         break;
3853                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3854                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3855                         if (!he_6ghz_oper->ccfs1)
3856                                 break;
3857                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3858                                 if (support_160)
3859                                         he_chandef.width = NL80211_CHAN_WIDTH_160;
3860                         } else {
3861                                 if (support_80_80)
3862                                         he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3863                         }
3864                         break;
3865                 }
3866
3867                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3868                         he_chandef.center_freq1 =
3869                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3870                                                                NL80211_BAND_6GHZ);
3871                 } else {
3872                         he_chandef.center_freq1 =
3873                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3874                                                                NL80211_BAND_6GHZ);
3875                         if (support_80_80 || support_160)
3876                                 he_chandef.center_freq2 =
3877                                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3878                                                                        NL80211_BAND_6GHZ);
3879                 }
3880         } else {
3881                 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0];
3882                 support_320 =
3883                         eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
3884
3885                 ieee80211_chandef_eht_oper(eht_oper, support_160,
3886                                            support_320, &he_chandef);
3887         }
3888
3889         if (!cfg80211_chandef_valid(&he_chandef)) {
3890                 sdata_info(sdata,
3891                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3892                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3893                            he_chandef.width,
3894                            he_chandef.center_freq1,
3895                            he_chandef.center_freq2);
3896                 return false;
3897         }
3898
3899         *chandef = he_chandef;
3900
3901         return true;
3902 }
3903
3904 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3905                                 struct cfg80211_chan_def *chandef)
3906 {
3907         u32 oper_freq;
3908
3909         if (!oper)
3910                 return false;
3911
3912         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3913         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3914                 chandef->width = NL80211_CHAN_WIDTH_1;
3915                 break;
3916         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3917                 chandef->width = NL80211_CHAN_WIDTH_2;
3918                 break;
3919         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3920                 chandef->width = NL80211_CHAN_WIDTH_4;
3921                 break;
3922         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3923                 chandef->width = NL80211_CHAN_WIDTH_8;
3924                 break;
3925         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3926                 chandef->width = NL80211_CHAN_WIDTH_16;
3927                 break;
3928         default:
3929                 return false;
3930         }
3931
3932         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3933                                                   NL80211_BAND_S1GHZ);
3934         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3935         chandef->freq1_offset = oper_freq % 1000;
3936
3937         return true;
3938 }
3939
3940 int ieee80211_parse_bitrates(enum nl80211_chan_width width,
3941                              const struct ieee80211_supported_band *sband,
3942                              const u8 *srates, int srates_len, u32 *rates)
3943 {
3944         u32 rate_flags = ieee80211_chanwidth_rate_flags(width);
3945         int shift = ieee80211_chanwidth_get_shift(width);
3946         struct ieee80211_rate *br;
3947         int brate, rate, i, j, count = 0;
3948
3949         *rates = 0;
3950
3951         for (i = 0; i < srates_len; i++) {
3952                 rate = srates[i] & 0x7f;
3953
3954                 for (j = 0; j < sband->n_bitrates; j++) {
3955                         br = &sband->bitrates[j];
3956                         if ((rate_flags & br->flags) != rate_flags)
3957                                 continue;
3958
3959                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3960                         if (brate == rate) {
3961                                 *rates |= BIT(j);
3962                                 count++;
3963                                 break;
3964                         }
3965                 }
3966         }
3967         return count;
3968 }
3969
3970 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3971                             struct sk_buff *skb, bool need_basic,
3972                             enum nl80211_band band)
3973 {
3974         struct ieee80211_local *local = sdata->local;
3975         struct ieee80211_supported_band *sband;
3976         int rate, shift;
3977         u8 i, rates, *pos;
3978         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3979         u32 rate_flags;
3980
3981         shift = ieee80211_vif_get_shift(&sdata->vif);
3982         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3983         sband = local->hw.wiphy->bands[band];
3984         rates = 0;
3985         for (i = 0; i < sband->n_bitrates; i++) {
3986                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3987                         continue;
3988                 rates++;
3989         }
3990         if (rates > 8)
3991                 rates = 8;
3992
3993         if (skb_tailroom(skb) < rates + 2)
3994                 return -ENOMEM;
3995
3996         pos = skb_put(skb, rates + 2);
3997         *pos++ = WLAN_EID_SUPP_RATES;
3998         *pos++ = rates;
3999         for (i = 0; i < rates; i++) {
4000                 u8 basic = 0;
4001                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
4002                         continue;
4003
4004                 if (need_basic && basic_rates & BIT(i))
4005                         basic = 0x80;
4006                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
4007                                     5 * (1 << shift));
4008                 *pos++ = basic | (u8) rate;
4009         }
4010
4011         return 0;
4012 }
4013
4014 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
4015                                 struct sk_buff *skb, bool need_basic,
4016                                 enum nl80211_band band)
4017 {
4018         struct ieee80211_local *local = sdata->local;
4019         struct ieee80211_supported_band *sband;
4020         int rate, shift;
4021         u8 i, exrates, *pos;
4022         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
4023         u32 rate_flags;
4024
4025         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
4026         shift = ieee80211_vif_get_shift(&sdata->vif);
4027
4028         sband = local->hw.wiphy->bands[band];
4029         exrates = 0;
4030         for (i = 0; i < sband->n_bitrates; i++) {
4031                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
4032                         continue;
4033                 exrates++;
4034         }
4035
4036         if (exrates > 8)
4037                 exrates -= 8;
4038         else
4039                 exrates = 0;
4040
4041         if (skb_tailroom(skb) < exrates + 2)
4042                 return -ENOMEM;
4043
4044         if (exrates) {
4045                 pos = skb_put(skb, exrates + 2);
4046                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
4047                 *pos++ = exrates;
4048                 for (i = 8; i < sband->n_bitrates; i++) {
4049                         u8 basic = 0;
4050                         if ((rate_flags & sband->bitrates[i].flags)
4051                             != rate_flags)
4052                                 continue;
4053                         if (need_basic && basic_rates & BIT(i))
4054                                 basic = 0x80;
4055                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
4056                                             5 * (1 << shift));
4057                         *pos++ = basic | (u8) rate;
4058                 }
4059         }
4060         return 0;
4061 }
4062
4063 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
4064 {
4065         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4066
4067         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
4068                 return 0;
4069
4070         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
4071 }
4072 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
4073
4074 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
4075 {
4076         if (!mcs)
4077                 return 1;
4078
4079         /* TODO: consider rx_highest */
4080
4081         if (mcs->rx_mask[3])
4082                 return 4;
4083         if (mcs->rx_mask[2])
4084                 return 3;
4085         if (mcs->rx_mask[1])
4086                 return 2;
4087         return 1;
4088 }
4089
4090 /**
4091  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
4092  * @local: mac80211 hw info struct
4093  * @status: RX status
4094  * @mpdu_len: total MPDU length (including FCS)
4095  * @mpdu_offset: offset into MPDU to calculate timestamp at
4096  *
4097  * This function calculates the RX timestamp at the given MPDU offset, taking
4098  * into account what the RX timestamp was. An offset of 0 will just normalize
4099  * the timestamp to TSF at beginning of MPDU reception.
4100  */
4101 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
4102                                      struct ieee80211_rx_status *status,
4103                                      unsigned int mpdu_len,
4104                                      unsigned int mpdu_offset)
4105 {
4106         u64 ts = status->mactime;
4107         struct rate_info ri;
4108         u16 rate;
4109         u8 n_ltf;
4110
4111         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
4112                 return 0;
4113
4114         memset(&ri, 0, sizeof(ri));
4115
4116         ri.bw = status->bw;
4117
4118         /* Fill cfg80211 rate info */
4119         switch (status->encoding) {
4120         case RX_ENC_EHT:
4121                 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
4122                 ri.mcs = status->rate_idx;
4123                 ri.nss = status->nss;
4124                 ri.eht_ru_alloc = status->eht.ru;
4125                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4126                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4127                 /* TODO/FIXME: is this right? handle other PPDUs */
4128                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4129                         mpdu_offset += 2;
4130                         ts += 36;
4131                 }
4132                 break;
4133         case RX_ENC_HE:
4134                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
4135                 ri.mcs = status->rate_idx;
4136                 ri.nss = status->nss;
4137                 ri.he_ru_alloc = status->he_ru;
4138                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4139                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4140
4141                 /*
4142                  * See P802.11ax_D6.0, section 27.3.4 for
4143                  * VHT PPDU format.
4144                  */
4145                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4146                         mpdu_offset += 2;
4147                         ts += 36;
4148
4149                         /*
4150                          * TODO:
4151                          * For HE MU PPDU, add the HE-SIG-B.
4152                          * For HE ER PPDU, add 8us for the HE-SIG-A.
4153                          * For HE TB PPDU, add 4us for the HE-STF.
4154                          * Add the HE-LTF durations - variable.
4155                          */
4156                 }
4157
4158                 break;
4159         case RX_ENC_HT:
4160                 ri.mcs = status->rate_idx;
4161                 ri.flags |= RATE_INFO_FLAGS_MCS;
4162                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4163                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4164
4165                 /*
4166                  * See P802.11REVmd_D3.0, section 19.3.2 for
4167                  * HT PPDU format.
4168                  */
4169                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4170                         mpdu_offset += 2;
4171                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
4172                                 ts += 24;
4173                         else
4174                                 ts += 32;
4175
4176                         /*
4177                          * Add Data HT-LTFs per streams
4178                          * TODO: add Extension HT-LTFs, 4us per LTF
4179                          */
4180                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
4181                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
4182                         ts += n_ltf * 4;
4183                 }
4184
4185                 break;
4186         case RX_ENC_VHT:
4187                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
4188                 ri.mcs = status->rate_idx;
4189                 ri.nss = status->nss;
4190                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
4191                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
4192
4193                 /*
4194                  * See P802.11REVmd_D3.0, section 21.3.2 for
4195                  * VHT PPDU format.
4196                  */
4197                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4198                         mpdu_offset += 2;
4199                         ts += 36;
4200
4201                         /*
4202                          * Add VHT-LTFs per streams
4203                          */
4204                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
4205                                 ri.nss + 1 : ri.nss;
4206                         ts += 4 * n_ltf;
4207                 }
4208
4209                 break;
4210         default:
4211                 WARN_ON(1);
4212                 fallthrough;
4213         case RX_ENC_LEGACY: {
4214                 struct ieee80211_supported_band *sband;
4215                 int shift = 0;
4216                 int bitrate;
4217
4218                 switch (status->bw) {
4219                 case RATE_INFO_BW_10:
4220                         shift = 1;
4221                         break;
4222                 case RATE_INFO_BW_5:
4223                         shift = 2;
4224                         break;
4225                 }
4226
4227                 sband = local->hw.wiphy->bands[status->band];
4228                 bitrate = sband->bitrates[status->rate_idx].bitrate;
4229                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
4230
4231                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
4232                         if (status->band == NL80211_BAND_5GHZ) {
4233                                 ts += 20 << shift;
4234                                 mpdu_offset += 2;
4235                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
4236                                 ts += 96;
4237                         } else {
4238                                 ts += 192;
4239                         }
4240                 }
4241                 break;
4242                 }
4243         }
4244
4245         rate = cfg80211_calculate_bitrate(&ri);
4246         if (WARN_ONCE(!rate,
4247                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
4248                       (unsigned long long)status->flag, status->rate_idx,
4249                       status->nss))
4250                 return 0;
4251
4252         /* rewind from end of MPDU */
4253         if (status->flag & RX_FLAG_MACTIME_END)
4254                 ts -= mpdu_len * 8 * 10 / rate;
4255
4256         ts += mpdu_offset * 8 * 10 / rate;
4257
4258         return ts;
4259 }
4260
4261 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
4262 {
4263         struct ieee80211_sub_if_data *sdata;
4264         struct cfg80211_chan_def chandef;
4265
4266         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
4267         lockdep_assert_wiphy(local->hw.wiphy);
4268
4269         mutex_lock(&local->mtx);
4270         list_for_each_entry(sdata, &local->interfaces, list) {
4271                 /* it might be waiting for the local->mtx, but then
4272                  * by the time it gets it, sdata->wdev.cac_started
4273                  * will no longer be true
4274                  */
4275                 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work);
4276
4277                 if (sdata->wdev.cac_started) {
4278                         chandef = sdata->vif.bss_conf.chandef;
4279                         ieee80211_link_release_channel(&sdata->deflink);
4280                         cfg80211_cac_event(sdata->dev,
4281                                            &chandef,
4282                                            NL80211_RADAR_CAC_ABORTED,
4283                                            GFP_KERNEL);
4284                 }
4285         }
4286         mutex_unlock(&local->mtx);
4287 }
4288
4289 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
4290 {
4291         struct ieee80211_local *local =
4292                 container_of(work, struct ieee80211_local, radar_detected_work);
4293         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
4294         struct ieee80211_chanctx *ctx;
4295         int num_chanctx = 0;
4296
4297         mutex_lock(&local->chanctx_mtx);
4298         list_for_each_entry(ctx, &local->chanctx_list, list) {
4299                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
4300                         continue;
4301
4302                 num_chanctx++;
4303                 chandef = ctx->conf.def;
4304         }
4305         mutex_unlock(&local->chanctx_mtx);
4306
4307         wiphy_lock(local->hw.wiphy);
4308         ieee80211_dfs_cac_cancel(local);
4309         wiphy_unlock(local->hw.wiphy);
4310
4311         if (num_chanctx > 1)
4312                 /* XXX: multi-channel is not supported yet */
4313                 WARN_ON(1);
4314         else
4315                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
4316 }
4317
4318 void ieee80211_radar_detected(struct ieee80211_hw *hw)
4319 {
4320         struct ieee80211_local *local = hw_to_local(hw);
4321
4322         trace_api_radar_detected(local);
4323
4324         schedule_work(&local->radar_detected_work);
4325 }
4326 EXPORT_SYMBOL(ieee80211_radar_detected);
4327
4328 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
4329 {
4330         ieee80211_conn_flags_t ret;
4331         int tmp;
4332
4333         switch (c->width) {
4334         case NL80211_CHAN_WIDTH_20:
4335                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4336                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4337                 break;
4338         case NL80211_CHAN_WIDTH_40:
4339                 c->width = NL80211_CHAN_WIDTH_20;
4340                 c->center_freq1 = c->chan->center_freq;
4341                 ret = IEEE80211_CONN_DISABLE_40MHZ |
4342                       IEEE80211_CONN_DISABLE_VHT;
4343                 break;
4344         case NL80211_CHAN_WIDTH_80:
4345                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
4346                 /* n_P40 */
4347                 tmp /= 2;
4348                 /* freq_P40 */
4349                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
4350                 c->width = NL80211_CHAN_WIDTH_40;
4351                 ret = IEEE80211_CONN_DISABLE_VHT;
4352                 break;
4353         case NL80211_CHAN_WIDTH_80P80:
4354                 c->center_freq2 = 0;
4355                 c->width = NL80211_CHAN_WIDTH_80;
4356                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4357                       IEEE80211_CONN_DISABLE_160MHZ;
4358                 break;
4359         case NL80211_CHAN_WIDTH_160:
4360                 /* n_P20 */
4361                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
4362                 /* n_P80 */
4363                 tmp /= 4;
4364                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
4365                 c->width = NL80211_CHAN_WIDTH_80;
4366                 ret = IEEE80211_CONN_DISABLE_80P80MHZ |
4367                       IEEE80211_CONN_DISABLE_160MHZ;
4368                 break;
4369         case NL80211_CHAN_WIDTH_320:
4370                 /* n_P20 */
4371                 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20;
4372                 /* n_P160 */
4373                 tmp /= 8;
4374                 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp;
4375                 c->width = NL80211_CHAN_WIDTH_160;
4376                 ret = IEEE80211_CONN_DISABLE_320MHZ;
4377                 break;
4378         default:
4379         case NL80211_CHAN_WIDTH_20_NOHT:
4380                 WARN_ON_ONCE(1);
4381                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
4382                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4383                 break;
4384         case NL80211_CHAN_WIDTH_1:
4385         case NL80211_CHAN_WIDTH_2:
4386         case NL80211_CHAN_WIDTH_4:
4387         case NL80211_CHAN_WIDTH_8:
4388         case NL80211_CHAN_WIDTH_16:
4389         case NL80211_CHAN_WIDTH_5:
4390         case NL80211_CHAN_WIDTH_10:
4391                 WARN_ON_ONCE(1);
4392                 /* keep c->width */
4393                 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT;
4394                 break;
4395         }
4396
4397         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
4398
4399         return ret;
4400 }
4401
4402 /*
4403  * Returns true if smps_mode_new is strictly more restrictive than
4404  * smps_mode_old.
4405  */
4406 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
4407                                    enum ieee80211_smps_mode smps_mode_new)
4408 {
4409         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
4410                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
4411                 return false;
4412
4413         switch (smps_mode_old) {
4414         case IEEE80211_SMPS_STATIC:
4415                 return false;
4416         case IEEE80211_SMPS_DYNAMIC:
4417                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4418         case IEEE80211_SMPS_OFF:
4419                 return smps_mode_new != IEEE80211_SMPS_OFF;
4420         default:
4421                 WARN_ON(1);
4422         }
4423
4424         return false;
4425 }
4426
4427 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4428                               struct cfg80211_csa_settings *csa_settings)
4429 {
4430         struct sk_buff *skb;
4431         struct ieee80211_mgmt *mgmt;
4432         struct ieee80211_local *local = sdata->local;
4433         int freq;
4434         int hdr_len = offsetofend(struct ieee80211_mgmt,
4435                                   u.action.u.chan_switch);
4436         u8 *pos;
4437
4438         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4439             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4440                 return -EOPNOTSUPP;
4441
4442         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4443                             5 + /* channel switch announcement element */
4444                             3 + /* secondary channel offset element */
4445                             5 + /* wide bandwidth channel switch announcement */
4446                             8); /* mesh channel switch parameters element */
4447         if (!skb)
4448                 return -ENOMEM;
4449
4450         skb_reserve(skb, local->tx_headroom);
4451         mgmt = skb_put_zero(skb, hdr_len);
4452         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4453                                           IEEE80211_STYPE_ACTION);
4454
4455         eth_broadcast_addr(mgmt->da);
4456         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4457         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4458                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4459         } else {
4460                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4461                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4462         }
4463         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4464         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4465         pos = skb_put(skb, 5);
4466         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4467         *pos++ = 3;                                             /* IE length */
4468         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4469         freq = csa_settings->chandef.chan->center_freq;
4470         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4471         *pos++ = csa_settings->count;                           /* count */
4472
4473         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4474                 enum nl80211_channel_type ch_type;
4475
4476                 skb_put(skb, 3);
4477                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4478                 *pos++ = 1;                                     /* IE length */
4479                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4480                 if (ch_type == NL80211_CHAN_HT40PLUS)
4481                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4482                 else
4483                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4484         }
4485
4486         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4487                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4488
4489                 skb_put(skb, 8);
4490                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4491                 *pos++ = 6;                                     /* IE length */
4492                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4493                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4494                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4495                 *pos++ |= csa_settings->block_tx ?
4496                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4497                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4498                 pos += 2;
4499                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4500                 pos += 2;
4501         }
4502
4503         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4504             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4505             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4506                 skb_put(skb, 5);
4507                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4508         }
4509
4510         ieee80211_tx_skb(sdata, skb);
4511         return 0;
4512 }
4513
4514 static bool
4515 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4516 {
4517         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4518         int skip;
4519
4520         if (end > 0)
4521                 return false;
4522
4523         /* One shot NOA  */
4524         if (data->count[i] == 1)
4525                 return false;
4526
4527         if (data->desc[i].interval == 0)
4528                 return false;
4529
4530         /* End time is in the past, check for repetitions */
4531         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4532         if (data->count[i] < 255) {
4533                 if (data->count[i] <= skip) {
4534                         data->count[i] = 0;
4535                         return false;
4536                 }
4537
4538                 data->count[i] -= skip;
4539         }
4540
4541         data->desc[i].start += skip * data->desc[i].interval;
4542
4543         return true;
4544 }
4545
4546 static bool
4547 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4548                              s32 *offset)
4549 {
4550         bool ret = false;
4551         int i;
4552
4553         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4554                 s32 cur;
4555
4556                 if (!data->count[i])
4557                         continue;
4558
4559                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4560                         ret = true;
4561
4562                 cur = data->desc[i].start - tsf;
4563                 if (cur > *offset)
4564                         continue;
4565
4566                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4567                 if (cur > *offset)
4568                         *offset = cur;
4569         }
4570
4571         return ret;
4572 }
4573
4574 static u32
4575 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4576 {
4577         s32 offset = 0;
4578         int tries = 0;
4579         /*
4580          * arbitrary limit, used to avoid infinite loops when combined NoA
4581          * descriptors cover the full time period.
4582          */
4583         int max_tries = 5;
4584
4585         ieee80211_extend_absent_time(data, tsf, &offset);
4586         do {
4587                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4588                         break;
4589
4590                 tries++;
4591         } while (tries < max_tries);
4592
4593         return offset;
4594 }
4595
4596 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4597 {
4598         u32 next_offset = BIT(31) - 1;
4599         int i;
4600
4601         data->absent = 0;
4602         data->has_next_tsf = false;
4603         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4604                 s32 start;
4605
4606                 if (!data->count[i])
4607                         continue;
4608
4609                 ieee80211_extend_noa_desc(data, tsf, i);
4610                 start = data->desc[i].start - tsf;
4611                 if (start <= 0)
4612                         data->absent |= BIT(i);
4613
4614                 if (next_offset > start)
4615                         next_offset = start;
4616
4617                 data->has_next_tsf = true;
4618         }
4619
4620         if (data->absent)
4621                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4622
4623         data->next_tsf = tsf + next_offset;
4624 }
4625 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4626
4627 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4628                             struct ieee80211_noa_data *data, u32 tsf)
4629 {
4630         int ret = 0;
4631         int i;
4632
4633         memset(data, 0, sizeof(*data));
4634
4635         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4636                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4637
4638                 if (!desc->count || !desc->duration)
4639                         continue;
4640
4641                 data->count[i] = desc->count;
4642                 data->desc[i].start = le32_to_cpu(desc->start_time);
4643                 data->desc[i].duration = le32_to_cpu(desc->duration);
4644                 data->desc[i].interval = le32_to_cpu(desc->interval);
4645
4646                 if (data->count[i] > 1 &&
4647                     data->desc[i].interval < data->desc[i].duration)
4648                         continue;
4649
4650                 ieee80211_extend_noa_desc(data, tsf, i);
4651                 ret++;
4652         }
4653
4654         if (ret)
4655                 ieee80211_update_p2p_noa(data, tsf);
4656
4657         return ret;
4658 }
4659 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4660
4661 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4662                            struct ieee80211_sub_if_data *sdata)
4663 {
4664         u64 tsf = drv_get_tsf(local, sdata);
4665         u64 dtim_count = 0;
4666         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4667         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4668         struct ps_data *ps;
4669         u8 bcns_from_dtim;
4670
4671         if (tsf == -1ULL || !beacon_int || !dtim_period)
4672                 return;
4673
4674         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4675             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4676                 if (!sdata->bss)
4677                         return;
4678
4679                 ps = &sdata->bss->ps;
4680         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4681                 ps = &sdata->u.mesh.ps;
4682         } else {
4683                 return;
4684         }
4685
4686         /*
4687          * actually finds last dtim_count, mac80211 will update in
4688          * __beacon_add_tim().
4689          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4690          */
4691         do_div(tsf, beacon_int);
4692         bcns_from_dtim = do_div(tsf, dtim_period);
4693         /* just had a DTIM */
4694         if (!bcns_from_dtim)
4695                 dtim_count = 0;
4696         else
4697                 dtim_count = dtim_period - bcns_from_dtim;
4698
4699         ps->dtim_count = dtim_count;
4700 }
4701
4702 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4703                                          struct ieee80211_chanctx *ctx)
4704 {
4705         struct ieee80211_link_data *link;
4706         u8 radar_detect = 0;
4707
4708         lockdep_assert_held(&local->chanctx_mtx);
4709
4710         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4711                 return 0;
4712
4713         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
4714                 if (link->reserved_radar_required)
4715                         radar_detect |= BIT(link->reserved_chandef.width);
4716
4717         /*
4718          * An in-place reservation context should not have any assigned vifs
4719          * until it replaces the other context.
4720          */
4721         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4722                 !list_empty(&ctx->assigned_links));
4723
4724         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
4725                 if (!link->radar_required)
4726                         continue;
4727
4728                 radar_detect |=
4729                         BIT(link->conf->chandef.width);
4730         }
4731
4732         return radar_detect;
4733 }
4734
4735 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4736                                  const struct cfg80211_chan_def *chandef,
4737                                  enum ieee80211_chanctx_mode chanmode,
4738                                  u8 radar_detect)
4739 {
4740         struct ieee80211_local *local = sdata->local;
4741         struct ieee80211_sub_if_data *sdata_iter;
4742         enum nl80211_iftype iftype = sdata->wdev.iftype;
4743         struct ieee80211_chanctx *ctx;
4744         int total = 1;
4745         struct iface_combination_params params = {
4746                 .radar_detect = radar_detect,
4747         };
4748
4749         lockdep_assert_held(&local->chanctx_mtx);
4750
4751         if (WARN_ON(hweight32(radar_detect) > 1))
4752                 return -EINVAL;
4753
4754         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4755                     !chandef->chan))
4756                 return -EINVAL;
4757
4758         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4759                 return -EINVAL;
4760
4761         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4762             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4763                 /*
4764                  * always passing this is harmless, since it'll be the
4765                  * same value that cfg80211 finds if it finds the same
4766                  * interface ... and that's always allowed
4767                  */
4768                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4769         }
4770
4771         /* Always allow software iftypes */
4772         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4773                 if (radar_detect)
4774                         return -EINVAL;
4775                 return 0;
4776         }
4777
4778         if (chandef)
4779                 params.num_different_channels = 1;
4780
4781         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4782                 params.iftype_num[iftype] = 1;
4783
4784         list_for_each_entry(ctx, &local->chanctx_list, list) {
4785                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4786                         continue;
4787                 params.radar_detect |=
4788                         ieee80211_chanctx_radar_detect(local, ctx);
4789                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4790                         params.num_different_channels++;
4791                         continue;
4792                 }
4793                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4794                     cfg80211_chandef_compatible(chandef,
4795                                                 &ctx->conf.def))
4796                         continue;
4797                 params.num_different_channels++;
4798         }
4799
4800         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4801                 struct wireless_dev *wdev_iter;
4802
4803                 wdev_iter = &sdata_iter->wdev;
4804
4805                 if (sdata_iter == sdata ||
4806                     !ieee80211_sdata_running(sdata_iter) ||
4807                     cfg80211_iftype_allowed(local->hw.wiphy,
4808                                             wdev_iter->iftype, 0, 1))
4809                         continue;
4810
4811                 params.iftype_num[wdev_iter->iftype]++;
4812                 total++;
4813         }
4814
4815         if (total == 1 && !params.radar_detect)
4816                 return 0;
4817
4818         return cfg80211_check_combinations(local->hw.wiphy, &params);
4819 }
4820
4821 static void
4822 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4823                          void *data)
4824 {
4825         u32 *max_num_different_channels = data;
4826
4827         *max_num_different_channels = max(*max_num_different_channels,
4828                                           c->num_different_channels);
4829 }
4830
4831 int ieee80211_max_num_channels(struct ieee80211_local *local)
4832 {
4833         struct ieee80211_sub_if_data *sdata;
4834         struct ieee80211_chanctx *ctx;
4835         u32 max_num_different_channels = 1;
4836         int err;
4837         struct iface_combination_params params = {0};
4838
4839         lockdep_assert_held(&local->chanctx_mtx);
4840
4841         list_for_each_entry(ctx, &local->chanctx_list, list) {
4842                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4843                         continue;
4844
4845                 params.num_different_channels++;
4846
4847                 params.radar_detect |=
4848                         ieee80211_chanctx_radar_detect(local, ctx);
4849         }
4850
4851         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4852                 params.iftype_num[sdata->wdev.iftype]++;
4853
4854         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4855                                          ieee80211_iter_max_chans,
4856                                          &max_num_different_channels);
4857         if (err < 0)
4858                 return err;
4859
4860         return max_num_different_channels;
4861 }
4862
4863 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4864                                 struct ieee80211_sta_s1g_cap *caps,
4865                                 struct sk_buff *skb)
4866 {
4867         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4868         struct ieee80211_s1g_cap s1g_capab;
4869         u8 *pos;
4870         int i;
4871
4872         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4873                 return;
4874
4875         if (!caps->s1g)
4876                 return;
4877
4878         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4879         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4880
4881         /* override the capability info */
4882         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4883                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4884
4885                 s1g_capab.capab_info[i] &= ~mask;
4886                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4887         }
4888
4889         /* then MCS and NSS set */
4890         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4891                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4892
4893                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4894                 s1g_capab.supp_mcs_nss[i] |=
4895                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4896         }
4897
4898         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4899         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4900         *pos++ = sizeof(s1g_capab);
4901
4902         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4903 }
4904
4905 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4906                                   struct sk_buff *skb)
4907 {
4908         u8 *pos = skb_put(skb, 3);
4909
4910         *pos++ = WLAN_EID_AID_REQUEST;
4911         *pos++ = 1;
4912         *pos++ = 0;
4913 }
4914
4915 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4916 {
4917         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4918         *buf++ = 7; /* len */
4919         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4920         *buf++ = 0x50;
4921         *buf++ = 0xf2;
4922         *buf++ = 2; /* WME */
4923         *buf++ = 0; /* WME info */
4924         *buf++ = 1; /* WME ver */
4925         *buf++ = qosinfo; /* U-APSD no in use */
4926
4927         return buf;
4928 }
4929
4930 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4931                              unsigned long *frame_cnt,
4932                              unsigned long *byte_cnt)
4933 {
4934         struct txq_info *txqi = to_txq_info(txq);
4935         u32 frag_cnt = 0, frag_bytes = 0;
4936         struct sk_buff *skb;
4937
4938         skb_queue_walk(&txqi->frags, skb) {
4939                 frag_cnt++;
4940                 frag_bytes += skb->len;
4941         }
4942
4943         if (frame_cnt)
4944                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4945
4946         if (byte_cnt)
4947                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4948 }
4949 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4950
4951 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4952         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4953         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4954         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4955         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4956 };
4957
4958 u16 ieee80211_encode_usf(int listen_interval)
4959 {
4960         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4961         u16 ui, usf = 0;
4962
4963         /* find greatest USF */
4964         while (usf < IEEE80211_MAX_USF) {
4965                 if (listen_interval % listen_int_usf[usf + 1])
4966                         break;
4967                 usf += 1;
4968         }
4969         ui = listen_interval / listen_int_usf[usf];
4970
4971         /* error if there is a remainder. Should've been checked by user */
4972         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4973         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4974                           FIELD_PREP(LISTEN_INT_UI, ui);
4975
4976         return (u16) listen_interval;
4977 }
4978
4979 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
4980 {
4981         const struct ieee80211_sta_he_cap *he_cap;
4982         const struct ieee80211_sta_eht_cap *eht_cap;
4983         struct ieee80211_supported_band *sband;
4984         bool is_ap;
4985         u8 n;
4986
4987         sband = ieee80211_get_sband(sdata);
4988         if (!sband)
4989                 return 0;
4990
4991         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
4992         eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype);
4993         if (!he_cap || !eht_cap)
4994                 return 0;
4995
4996         is_ap = iftype == NL80211_IFTYPE_AP ||
4997                 iftype == NL80211_IFTYPE_P2P_GO;
4998
4999         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
5000                                        &eht_cap->eht_cap_elem,
5001                                        is_ap);
5002         return 2 + 1 +
5003                sizeof(eht_cap->eht_cap_elem) + n +
5004                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
5005                                       eht_cap->eht_cap_elem.phy_cap_info);
5006         return 0;
5007 }
5008
5009 u8 *ieee80211_ie_build_eht_cap(u8 *pos,
5010                                const struct ieee80211_sta_he_cap *he_cap,
5011                                const struct ieee80211_sta_eht_cap *eht_cap,
5012                                u8 *end,
5013                                bool for_ap)
5014 {
5015         u8 mcs_nss_len, ppet_len;
5016         u8 ie_len;
5017         u8 *orig_pos = pos;
5018
5019         /* Make sure we have place for the IE */
5020         if (!he_cap || !eht_cap)
5021                 return orig_pos;
5022
5023         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
5024                                                  &eht_cap->eht_cap_elem,
5025                                                  for_ap);
5026         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
5027                                           eht_cap->eht_cap_elem.phy_cap_info);
5028
5029         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
5030         if ((end - pos) < ie_len)
5031                 return orig_pos;
5032
5033         *pos++ = WLAN_EID_EXTENSION;
5034         *pos++ = ie_len - 2;
5035         *pos++ = WLAN_EID_EXT_EHT_CAPABILITY;
5036
5037         /* Fixed data */
5038         memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem));
5039         pos += sizeof(eht_cap->eht_cap_elem);
5040
5041         memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
5042         pos += mcs_nss_len;
5043
5044         if (ppet_len) {
5045                 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len);
5046                 pos += ppet_len;
5047         }
5048
5049         return pos;
5050 }
5051
5052 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos)
5053 {
5054         unsigned int elem_len;
5055
5056         if (!len_pos)
5057                 return;
5058
5059         elem_len = skb->data + skb->len - len_pos - 1;
5060
5061         while (elem_len > 255) {
5062                 /* this one is 255 */
5063                 *len_pos = 255;
5064                 /* remaining data gets smaller */
5065                 elem_len -= 255;
5066                 /* make space for the fragment ID/len in SKB */
5067                 skb_put(skb, 2);
5068                 /* shift back the remaining data to place fragment ID/len */
5069                 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len);
5070                 /* place the fragment ID */
5071                 len_pos += 255 + 1;
5072                 *len_pos = WLAN_EID_FRAGMENT;
5073                 /* and point to fragment length to update later */
5074                 len_pos++;
5075         }
5076
5077         *len_pos = elem_len;
5078 }