net/mac80211/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2007       Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  * Copyright (C) 2015-2017      Intel Deutschland GmbH
   9  * Copyright (C) 2018-2021 Intel Corporation
  10  *
  11  * utilities for mac80211
  12  */
  13
  14 #include <net/mac80211.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/export.h>
  17 #include <linux/types.h>
  18 #include <linux/slab.h>
  19 #include <linux/skbuff.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/if_arp.h>
  22 #include <linux/bitmap.h>
  23 #include <linux/crc32.h>
  24 #include <net/net_namespace.h>
  25 #include <net/cfg80211.h>
  26 #include <net/rtnetlink.h>
  27
  28 #include "ieee80211_i.h"
  29 #include "driver-ops.h"
  30 #include "rate.h"
  31 #include "mesh.h"
  32 #include "wme.h"
  33 #include "led.h"
  34 #include "wep.h"
  35
  36 /* privid for wiphys to determine whether they belong to us or not */
  37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  38
  39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  40 {
  41         struct ieee80211_local *local;
  42
  43         local = wiphy_priv(wiphy);
  44         return &local->hw;
  45 }
  46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  47
  48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  49                         enum nl80211_iftype type)
  50 {
  51         __le16 fc = hdr->frame_control;
  52
  53         if (ieee80211_is_data(fc)) {
  54                 if (len < 24) /* drop incorrect hdr len (data) */
  55                         return NULL;
  56
  57                 if (ieee80211_has_a4(fc))
  58                         return NULL;
  59                 if (ieee80211_has_tods(fc))
  60                         return hdr->addr1;
  61                 if (ieee80211_has_fromds(fc))
  62                         return hdr->addr2;
  63
  64                 return hdr->addr3;
  65         }
  66
  67         if (ieee80211_is_s1g_beacon(fc)) {
  68                 struct ieee80211_ext *ext = (void *) hdr;
  69
  70                 return ext->u.s1g_beacon.sa;
  71         }
  72
  73         if (ieee80211_is_mgmt(fc)) {
  74                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  75                         return NULL;
  76                 return hdr->addr3;
  77         }
  78
  79         if (ieee80211_is_ctl(fc)) {
  80                 if (ieee80211_is_pspoll(fc))
  81                         return hdr->addr1;
  82
  83                 if (ieee80211_is_back_req(fc)) {
  84                         switch (type) {
  85                         case NL80211_IFTYPE_STATION:
  86                                 return hdr->addr2;
  87                         case NL80211_IFTYPE_AP:
  88                         case NL80211_IFTYPE_AP_VLAN:
  89                                 return hdr->addr1;
  90                         default:
  91                                 break; /* fall through to the return */
  92                         }
  93                 }
  94         }
  95
  96         return NULL;
  97 }
  98 EXPORT_SYMBOL(ieee80211_get_bssid);
  99
 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 101 {
 102         struct sk_buff *skb;
 103         struct ieee80211_hdr *hdr;
 104
 105         skb_queue_walk(&tx->skbs, skb) {
 106                 hdr = (struct ieee80211_hdr *) skb->data;
 107                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 108         }
 109 }
 110
 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 112                              int rate, int erp, int short_preamble,
 113                              int shift)
 114 {
 115         int dur;
 116
 117         /* calculate duration (in microseconds, rounded up to next higher
 118          * integer if it includes a fractional microsecond) to send frame of
 119          * len bytes (does not include FCS) at the given rate. Duration will
 120          * also include SIFS.
 121          *
 122          * rate is in 100 kbps, so divident is multiplied by 10 in the
 123          * DIV_ROUND_UP() operations.
 124          *
 125          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
 126          * is assumed to be 0 otherwise.
 127          */
 128
 129         if (band == NL80211_BAND_5GHZ || erp) {
 130                 /*
 131                  * OFDM:
 132                  *
 133                  * N_DBPS = DATARATE x 4
 134                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 135                  *      (16 = SIGNAL time, 6 = tail bits)
 136                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 137                  *
 138                  * T_SYM = 4 usec
 139                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 140                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 141                  *      signal ext = 6 usec
 142                  */
 143                 dur = 16; /* SIFS + signal ext */
 144                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 145                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 146
 147                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
 148                  *  * times 4 for 5 MHz
 149                  *  * times 2 for 10 MHz
 150                  */
 151                 dur *= 1 << shift;
 152
 153                 /* rates should already consider the channel bandwidth,
 154                  * don't apply divisor again.
 155                  */
 156                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 157                                         4 * rate); /* T_SYM x N_SYM */
 158         } else {
 159                 /*
 160                  * 802.11b or 802.11g with 802.11b compatibility:
 161                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 162                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 163                  *
 164                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 165                  * aSIFSTime = 10 usec
 166                  * aPreambleLength = 144 usec or 72 usec with short preamble
 167                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 168                  */
 169                 dur = 10; /* aSIFSTime = 10 usec */
 170                 dur += short_preamble ? (72 + 24) : (144 + 48);
 171
 172                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 173         }
 174
 175         return dur;
 176 }
 177
 178 /* Exported duration function for driver use */
 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 180                                         struct ieee80211_vif *vif,
 181                                         enum nl80211_band band,
 182                                         size_t frame_len,
 183                                         struct ieee80211_rate *rate)
 184 {
 185         struct ieee80211_sub_if_data *sdata;
 186         u16 dur;
 187         int erp, shift = 0;
 188         bool short_preamble = false;
 189
 190         erp = 0;
 191         if (vif) {
 192                 sdata = vif_to_sdata(vif);
 193                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 194                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 195                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 196                 shift = ieee80211_vif_get_shift(vif);
 197         }
 198
 199         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 200                                        short_preamble, shift);
 201
 202         return cpu_to_le16(dur);
 203 }
 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 205
 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 207                               struct ieee80211_vif *vif, size_t frame_len,
 208                               const struct ieee80211_tx_info *frame_txctl)
 209 {
 210         struct ieee80211_local *local = hw_to_local(hw);
 211         struct ieee80211_rate *rate;
 212         struct ieee80211_sub_if_data *sdata;
 213         bool short_preamble;
 214         int erp, shift = 0, bitrate;
 215         u16 dur;
 216         struct ieee80211_supported_band *sband;
 217
 218         sband = local->hw.wiphy->bands[frame_txctl->band];
 219
 220         short_preamble = false;
 221
 222         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 223
 224         erp = 0;
 225         if (vif) {
 226                 sdata = vif_to_sdata(vif);
 227                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 228                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 229                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 230                 shift = ieee80211_vif_get_shift(vif);
 231         }
 232
 233         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 234
 235         /* CTS duration */
 236         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                        erp, short_preamble, shift);
 238         /* Data frame duration */
 239         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 240                                         erp, short_preamble, shift);
 241         /* ACK duration */
 242         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 243                                         erp, short_preamble, shift);
 244
 245         return cpu_to_le16(dur);
 246 }
 247 EXPORT_SYMBOL(ieee80211_rts_duration);
 248
 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 250                                     struct ieee80211_vif *vif,
 251                                     size_t frame_len,
 252                                     const struct ieee80211_tx_info *frame_txctl)
 253 {
 254         struct ieee80211_local *local = hw_to_local(hw);
 255         struct ieee80211_rate *rate;
 256         struct ieee80211_sub_if_data *sdata;
 257         bool short_preamble;
 258         int erp, shift = 0, bitrate;
 259         u16 dur;
 260         struct ieee80211_supported_band *sband;
 261
 262         sband = local->hw.wiphy->bands[frame_txctl->band];
 263
 264         short_preamble = false;
 265
 266         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 267         erp = 0;
 268         if (vif) {
 269                 sdata = vif_to_sdata(vif);
 270                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 271                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 272                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 273                 shift = ieee80211_vif_get_shift(vif);
 274         }
 275
 276         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 277
 278         /* Data frame duration */
 279         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 280                                        erp, short_preamble, shift);
 281         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 282                 /* ACK duration */
 283                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 284                                                 erp, short_preamble, shift);
 285         }
 286
 287         return cpu_to_le16(dur);
 288 }
 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 290
 291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 292 {
 293         struct ieee80211_local *local = sdata->local;
 294         struct ieee80211_vif *vif = &sdata->vif;
 295         struct fq *fq = &local->fq;
 296         struct ps_data *ps = NULL;
 297         struct txq_info *txqi;
 298         struct sta_info *sta;
 299         int i;
 300
 301         local_bh_disable();
 302         spin_lock(&fq->lock);
 303
 304         if (sdata->vif.type == NL80211_IFTYPE_AP)
 305                 ps = &sdata->bss->ps;
 306
 307         sdata->vif.txqs_stopped[ac] = false;
 308
 309         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 310                 if (sdata != sta->sdata)
 311                         continue;
 312
 313                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 314                         struct ieee80211_txq *txq = sta->sta.txq[i];
 315
 316                         if (!txq)
 317                                 continue;
 318
 319                         txqi = to_txq_info(txq);
 320
 321                         if (ac != txq->ac)
 322                                 continue;
 323
 324                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 325                                                 &txqi->flags))
 326                                 continue;
 327
 328                         spin_unlock(&fq->lock);
 329                         drv_wake_tx_queue(local, txqi);
 330                         spin_lock(&fq->lock);
 331                 }
 332         }
 333
 334         if (!vif->txq)
 335                 goto out;
 336
 337         txqi = to_txq_info(vif->txq);
 338
 339         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 340             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 341                 goto out;
 342
 343         spin_unlock(&fq->lock);
 344
 345         drv_wake_tx_queue(local, txqi);
 346         local_bh_enable();
 347         return;
 348 out:
 349         spin_unlock(&fq->lock);
 350         local_bh_enable();
 351 }
 352
 353 static void
 354 __releases(&local->queue_stop_reason_lock)
 355 __acquires(&local->queue_stop_reason_lock)
 356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 357 {
 358         struct ieee80211_sub_if_data *sdata;
 359         int n_acs = IEEE80211_NUM_ACS;
 360         int i;
 361
 362         rcu_read_lock();
 363
 364         if (local->hw.queues < IEEE80211_NUM_ACS)
 365                 n_acs = 1;
 366
 367         for (i = 0; i < local->hw.queues; i++) {
 368                 if (local->queue_stop_reasons[i])
 369                         continue;
 370
 371                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 372                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 373                         int ac;
 374
 375                         for (ac = 0; ac < n_acs; ac++) {
 376                                 int ac_queue = sdata->vif.hw_queue[ac];
 377
 378                                 if (ac_queue == i ||
 379                                     sdata->vif.cab_queue == i)
 380                                         __ieee80211_wake_txqs(sdata, ac);
 381                         }
 382                 }
 383                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 384         }
 385
 386         rcu_read_unlock();
 387 }
 388
 389 void ieee80211_wake_txqs(struct tasklet_struct *t)
 390 {
 391         struct ieee80211_local *local = from_tasklet(local, t,
 392                                                      wake_txqs_tasklet);
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 396         _ieee80211_wake_txqs(local, &flags);
 397         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 398 }
 399
 400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 401 {
 402         struct ieee80211_sub_if_data *sdata;
 403         int n_acs = IEEE80211_NUM_ACS;
 404
 405         if (local->ops->wake_tx_queue)
 406                 return;
 407
 408         if (local->hw.queues < IEEE80211_NUM_ACS)
 409                 n_acs = 1;
 410
 411         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 412                 int ac;
 413
 414                 if (!sdata->dev)
 415                         continue;
 416
 417                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 418                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 419                         continue;
 420
 421                 for (ac = 0; ac < n_acs; ac++) {
 422                         int ac_queue = sdata->vif.hw_queue[ac];
 423
 424                         if (ac_queue == queue ||
 425                             (sdata->vif.cab_queue == queue &&
 426                              local->queue_stop_reasons[ac_queue] == 0 &&
 427                              skb_queue_empty(&local->pending[ac_queue])))
 428                                 netif_wake_subqueue(sdata->dev, ac);
 429                 }
 430         }
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         trace_wake_queue(local, queue, reason);
 441
 442         if (WARN_ON(queue >= hw->queues))
 443                 return;
 444
 445         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 446                 return;
 447
 448         if (!refcounted) {
 449                 local->q_stop_reasons[queue][reason] = 0;
 450         } else {
 451                 local->q_stop_reasons[queue][reason]--;
 452                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 453                         local->q_stop_reasons[queue][reason] = 0;
 454         }
 455
 456         if (local->q_stop_reasons[queue][reason] == 0)
 457                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 458
 459         if (local->queue_stop_reasons[queue] != 0)
 460                 /* someone still has this queue stopped */
 461                 return;
 462
 463         if (skb_queue_empty(&local->pending[queue])) {
 464                 rcu_read_lock();
 465                 ieee80211_propagate_queue_wake(local, queue);
 466                 rcu_read_unlock();
 467         } else
 468                 tasklet_schedule(&local->tx_pending_tasklet);
 469
 470         /*
 471          * Calling _ieee80211_wake_txqs here can be a problem because it may
 472          * release queue_stop_reason_lock which has been taken by
 473          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 474          * release someone's lock, but it is fine because all the callers of
 475          * __ieee80211_wake_queue call it right before releasing the lock.
 476          */
 477         if (local->ops->wake_tx_queue) {
 478                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 479                         tasklet_schedule(&local->wake_txqs_tasklet);
 480                 else
 481                         _ieee80211_wake_txqs(local, flags);
 482         }
 483 }
 484
 485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 486                                     enum queue_stop_reason reason,
 487                                     bool refcounted)
 488 {
 489         struct ieee80211_local *local = hw_to_local(hw);
 490         unsigned long flags;
 491
 492         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 493         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 494         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 495 }
 496
 497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 498 {
 499         ieee80211_wake_queue_by_reason(hw, queue,
 500                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 501                                        false);
 502 }
 503 EXPORT_SYMBOL(ieee80211_wake_queue);
 504
 505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 506                                    enum queue_stop_reason reason,
 507                                    bool refcounted)
 508 {
 509         struct ieee80211_local *local = hw_to_local(hw);
 510         struct ieee80211_sub_if_data *sdata;
 511         int n_acs = IEEE80211_NUM_ACS;
 512
 513         trace_stop_queue(local, queue, reason);
 514
 515         if (WARN_ON(queue >= hw->queues))
 516                 return;
 517
 518         if (!refcounted)
 519                 local->q_stop_reasons[queue][reason] = 1;
 520         else
 521                 local->q_stop_reasons[queue][reason]++;
 522
 523         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 524                 return;
 525
 526         if (local->hw.queues < IEEE80211_NUM_ACS)
 527                 n_acs = 1;
 528
 529         rcu_read_lock();
 530         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 531                 int ac;
 532
 533                 if (!sdata->dev)
 534                         continue;
 535
 536                 for (ac = 0; ac < n_acs; ac++) {
 537                         if (sdata->vif.hw_queue[ac] == queue ||
 538                             sdata->vif.cab_queue == queue) {
 539                                 if (!local->ops->wake_tx_queue) {
 540                                         netif_stop_subqueue(sdata->dev, ac);
 541                                         continue;
 542                                 }
 543                                 spin_lock(&local->fq.lock);
 544                                 sdata->vif.txqs_stopped[ac] = true;
 545                                 spin_unlock(&local->fq.lock);
 546                         }
 547                 }
 548         }
 549         rcu_read_unlock();
 550 }
 551
 552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 553                                     enum queue_stop_reason reason,
 554                                     bool refcounted)
 555 {
 556         struct ieee80211_local *local = hw_to_local(hw);
 557         unsigned long flags;
 558
 559         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 560         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 561         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 562 }
 563
 564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 565 {
 566         ieee80211_stop_queue_by_reason(hw, queue,
 567                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 568                                        false);
 569 }
 570 EXPORT_SYMBOL(ieee80211_stop_queue);
 571
 572 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 573                                struct sk_buff *skb)
 574 {
 575         struct ieee80211_hw *hw = &local->hw;
 576         unsigned long flags;
 577         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 578         int queue = info->hw_queue;
 579
 580         if (WARN_ON(!info->control.vif)) {
 581                 ieee80211_free_txskb(&local->hw, skb);
 582                 return;
 583         }
 584
 585         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 586         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 587                                false);
 588         __skb_queue_tail(&local->pending[queue], skb);
 589         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 590                                false, &flags);
 591         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 592 }
 593
 594 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 595                                 struct sk_buff_head *skbs)
 596 {
 597         struct ieee80211_hw *hw = &local->hw;
 598         struct sk_buff *skb;
 599         unsigned long flags;
 600         int queue, i;
 601
 602         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 603         while ((skb = skb_dequeue(skbs))) {
 604                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 605
 606                 if (WARN_ON(!info->control.vif)) {
 607                         ieee80211_free_txskb(&local->hw, skb);
 608                         continue;
 609                 }
 610
 611                 queue = info->hw_queue;
 612
 613                 __ieee80211_stop_queue(hw, queue,
 614                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 615                                 false);
 616
 617                 __skb_queue_tail(&local->pending[queue], skb);
 618         }
 619
 620         for (i = 0; i < hw->queues; i++)
 621                 __ieee80211_wake_queue(hw, i,
 622                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 623                         false, &flags);
 624         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 625 }
 626
 627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 628                                      unsigned long queues,
 629                                      enum queue_stop_reason reason,
 630                                      bool refcounted)
 631 {
 632         struct ieee80211_local *local = hw_to_local(hw);
 633         unsigned long flags;
 634         int i;
 635
 636         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 637
 638         for_each_set_bit(i, &queues, hw->queues)
 639                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 640
 641         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 642 }
 643
 644 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 645 {
 646         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 647                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 648                                         false);
 649 }
 650 EXPORT_SYMBOL(ieee80211_stop_queues);
 651
 652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 653 {
 654         struct ieee80211_local *local = hw_to_local(hw);
 655         unsigned long flags;
 656         int ret;
 657
 658         if (WARN_ON(queue >= hw->queues))
 659                 return true;
 660
 661         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 662         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 663                        &local->queue_stop_reasons[queue]);
 664         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 665         return ret;
 666 }
 667 EXPORT_SYMBOL(ieee80211_queue_stopped);
 668
 669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 670                                      unsigned long queues,
 671                                      enum queue_stop_reason reason,
 672                                      bool refcounted)
 673 {
 674         struct ieee80211_local *local = hw_to_local(hw);
 675         unsigned long flags;
 676         int i;
 677
 678         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 679
 680         for_each_set_bit(i, &queues, hw->queues)
 681                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 682
 683         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 684 }
 685
 686 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 687 {
 688         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 689                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 690                                         false);
 691 }
 692 EXPORT_SYMBOL(ieee80211_wake_queues);
 693
 694 static unsigned int
 695 ieee80211_get_vif_queues(struct ieee80211_local *local,
 696                          struct ieee80211_sub_if_data *sdata)
 697 {
 698         unsigned int queues;
 699
 700         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 701                 int ac;
 702
 703                 queues = 0;
 704
 705                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 706                         queues |= BIT(sdata->vif.hw_queue[ac]);
 707                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 708                         queues |= BIT(sdata->vif.cab_queue);
 709         } else {
 710                 /* all queues */
 711                 queues = BIT(local->hw.queues) - 1;
 712         }
 713
 714         return queues;
 715 }
 716
 717 void __ieee80211_flush_queues(struct ieee80211_local *local,
 718                               struct ieee80211_sub_if_data *sdata,
 719                               unsigned int queues, bool drop)
 720 {
 721         if (!local->ops->flush)
 722                 return;
 723
 724         /*
 725          * If no queue was set, or if the HW doesn't support
 726          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 727          */
 728         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 729                 queues = ieee80211_get_vif_queues(local, sdata);
 730
 731         ieee80211_stop_queues_by_reason(&local->hw, queues,
 732                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 733                                         false);
 734
 735         drv_flush(local, sdata, queues, drop);
 736
 737         ieee80211_wake_queues_by_reason(&local->hw, queues,
 738                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 739                                         false);
 740 }
 741
 742 void ieee80211_flush_queues(struct ieee80211_local *local,
 743                             struct ieee80211_sub_if_data *sdata, bool drop)
 744 {
 745         __ieee80211_flush_queues(local, sdata, 0, drop);
 746 }
 747
 748 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 749                                struct ieee80211_sub_if_data *sdata,
 750                                enum queue_stop_reason reason)
 751 {
 752         ieee80211_stop_queues_by_reason(&local->hw,
 753                                         ieee80211_get_vif_queues(local, sdata),
 754                                         reason, true);
 755 }
 756
 757 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 758                                struct ieee80211_sub_if_data *sdata,
 759                                enum queue_stop_reason reason)
 760 {
 761         ieee80211_wake_queues_by_reason(&local->hw,
 762                                         ieee80211_get_vif_queues(local, sdata),
 763                                         reason, true);
 764 }
 765
 766 static void __iterate_interfaces(struct ieee80211_local *local,
 767                                  u32 iter_flags,
 768                                  void (*iterator)(void *data, u8 *mac,
 769                                                   struct ieee80211_vif *vif),
 770                                  void *data)
 771 {
 772         struct ieee80211_sub_if_data *sdata;
 773         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 774
 775         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 776                 switch (sdata->vif.type) {
 777                 case NL80211_IFTYPE_MONITOR:
 778                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 779                                 continue;
 780                         break;
 781                 case NL80211_IFTYPE_AP_VLAN:
 782                         continue;
 783                 default:
 784                         break;
 785                 }
 786                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 787                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 788                         continue;
 789                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 790                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 791                         continue;
 792                 if (ieee80211_sdata_running(sdata) || !active_only)
 793                         iterator(data, sdata->vif.addr,
 794                                  &sdata->vif);
 795         }
 796
 797         sdata = rcu_dereference_check(local->monitor_sdata,
 798                                       lockdep_is_held(&local->iflist_mtx) ||
 799                                       lockdep_is_held(&local->hw.wiphy->mtx));
 800         if (sdata &&
 801             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 802              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 803                 iterator(data, sdata->vif.addr, &sdata->vif);
 804 }
 805
 806 void ieee80211_iterate_interfaces(
 807         struct ieee80211_hw *hw, u32 iter_flags,
 808         void (*iterator)(void *data, u8 *mac,
 809                          struct ieee80211_vif *vif),
 810         void *data)
 811 {
 812         struct ieee80211_local *local = hw_to_local(hw);
 813
 814         mutex_lock(&local->iflist_mtx);
 815         __iterate_interfaces(local, iter_flags, iterator, data);
 816         mutex_unlock(&local->iflist_mtx);
 817 }
 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 819
 820 void ieee80211_iterate_active_interfaces_atomic(
 821         struct ieee80211_hw *hw, u32 iter_flags,
 822         void (*iterator)(void *data, u8 *mac,
 823                          struct ieee80211_vif *vif),
 824         void *data)
 825 {
 826         struct ieee80211_local *local = hw_to_local(hw);
 827
 828         rcu_read_lock();
 829         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 830                              iterator, data);
 831         rcu_read_unlock();
 832 }
 833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 834
 835 void ieee80211_iterate_active_interfaces_mtx(
 836         struct ieee80211_hw *hw, u32 iter_flags,
 837         void (*iterator)(void *data, u8 *mac,
 838                          struct ieee80211_vif *vif),
 839         void *data)
 840 {
 841         struct ieee80211_local *local = hw_to_local(hw);
 842
 843         lockdep_assert_wiphy(hw->wiphy);
 844
 845         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 846                              iterator, data);
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 849
 850 static void __iterate_stations(struct ieee80211_local *local,
 851                                void (*iterator)(void *data,
 852                                                 struct ieee80211_sta *sta),
 853                                void *data)
 854 {
 855         struct sta_info *sta;
 856
 857         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 858                 if (!sta->uploaded)
 859                         continue;
 860
 861                 iterator(data, &sta->sta);
 862         }
 863 }
 864
 865 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 866                         void (*iterator)(void *data,
 867                                          struct ieee80211_sta *sta),
 868                         void *data)
 869 {
 870         struct ieee80211_local *local = hw_to_local(hw);
 871
 872         rcu_read_lock();
 873         __iterate_stations(local, iterator, data);
 874         rcu_read_unlock();
 875 }
 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 877
 878 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 879 {
 880         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 881
 882         if (!ieee80211_sdata_running(sdata) ||
 883             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 884                 return NULL;
 885         return &sdata->vif;
 886 }
 887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 888
 889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 890 {
 891         if (!vif)
 892                 return NULL;
 893
 894         return &vif_to_sdata(vif)->wdev;
 895 }
 896 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 897
 898 /*
 899  * Nothing should have been stuffed into the workqueue during
 900  * the suspend->resume cycle. Since we can't check each caller
 901  * of this function if we are already quiescing / suspended,
 902  * check here and don't WARN since this can actually happen when
 903  * the rx path (for example) is racing against __ieee80211_suspend
 904  * and suspending / quiescing was set after the rx path checked
 905  * them.
 906  */
 907 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 908 {
 909         if (local->quiescing || (local->suspended && !local->resuming)) {
 910                 pr_warn("queueing ieee80211 work while going to suspend\n");
 911                 return false;
 912         }
 913
 914         return true;
 915 }
 916
 917 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 918 {
 919         struct ieee80211_local *local = hw_to_local(hw);
 920
 921         if (!ieee80211_can_queue_work(local))
 922                 return;
 923
 924         queue_work(local->workqueue, work);
 925 }
 926 EXPORT_SYMBOL(ieee80211_queue_work);
 927
 928 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 929                                   struct delayed_work *dwork,
 930                                   unsigned long delay)
 931 {
 932         struct ieee80211_local *local = hw_to_local(hw);
 933
 934         if (!ieee80211_can_queue_work(local))
 935                 return;
 936
 937         queue_delayed_work(local->workqueue, dwork, delay);
 938 }
 939 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 940
 941 static void ieee80211_parse_extension_element(u32 *crc,
 942                                               const struct element *elem,
 943                                               struct ieee802_11_elems *elems)
 944 {
 945         const void *data = elem->data + 1;
 946         u8 len;
 947
 948         if (!elem->datalen)
 949                 return;
 950
 951         len = elem->datalen - 1;
 952
 953         switch (elem->data[0]) {
 954         case WLAN_EID_EXT_HE_MU_EDCA:
 955                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 956                         elems->mu_edca_param_set = data;
 957                         if (crc)
 958                                 *crc = crc32_be(*crc, (void *)elem,
 959                                                 elem->datalen + 2);
 960                 }
 961                 break;
 962         case WLAN_EID_EXT_HE_CAPABILITY:
 963                 elems->he_cap = data;
 964                 elems->he_cap_len = len;
 965                 break;
 966         case WLAN_EID_EXT_HE_OPERATION:
 967                 if (len >= sizeof(*elems->he_operation) &&
 968                     len >= ieee80211_he_oper_size(data) - 1) {
 969                         if (crc)
 970                                 *crc = crc32_be(*crc, (void *)elem,
 971                                                 elem->datalen + 2);
 972                         elems->he_operation = data;
 973                 }
 974                 break;
 975         case WLAN_EID_EXT_UORA:
 976                 if (len >= 1)
 977                         elems->uora_element = data;
 978                 break;
 979         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 980                 if (len == 3)
 981                         elems->max_channel_switch_time = data;
 982                 break;
 983         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 984                 if (len >= sizeof(*elems->mbssid_config_ie))
 985                         elems->mbssid_config_ie = data;
 986                 break;
 987         case WLAN_EID_EXT_HE_SPR:
 988                 if (len >= sizeof(*elems->he_spr) &&
 989                     len >= ieee80211_he_spr_size(data))
 990                         elems->he_spr = data;
 991                 break;
 992         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 993                 if (len >= sizeof(*elems->he_6ghz_capa))
 994                         elems->he_6ghz_capa = data;
 995                 break;
 996         }
 997 }
 998
 999 static u32
1000 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1001                             struct ieee802_11_elems *elems,
1002                             u64 filter, u32 crc,
1003                             const struct element *check_inherit)
1004 {
1005         const struct element *elem;
1006         bool calc_crc = filter != 0;
1007         DECLARE_BITMAP(seen_elems, 256);
1008         const u8 *ie;
1009
1010         bitmap_zero(seen_elems, 256);
1011
1012         for_each_element(elem, start, len) {
1013                 bool elem_parse_failed;
1014                 u8 id = elem->id;
1015                 u8 elen = elem->datalen;
1016                 const u8 *pos = elem->data;
1017
1018                 if (check_inherit &&
1019                     !cfg80211_is_element_inherited(elem,
1020                                                    check_inherit))
1021                         continue;
1022
1023                 switch (id) {
1024                 case WLAN_EID_SSID:
1025                 case WLAN_EID_SUPP_RATES:
1026                 case WLAN_EID_FH_PARAMS:
1027                 case WLAN_EID_DS_PARAMS:
1028                 case WLAN_EID_CF_PARAMS:
1029                 case WLAN_EID_TIM:
1030                 case WLAN_EID_IBSS_PARAMS:
1031                 case WLAN_EID_CHALLENGE:
1032                 case WLAN_EID_RSN:
1033                 case WLAN_EID_ERP_INFO:
1034                 case WLAN_EID_EXT_SUPP_RATES:
1035                 case WLAN_EID_HT_CAPABILITY:
1036                 case WLAN_EID_HT_OPERATION:
1037                 case WLAN_EID_VHT_CAPABILITY:
1038                 case WLAN_EID_VHT_OPERATION:
1039                 case WLAN_EID_MESH_ID:
1040                 case WLAN_EID_MESH_CONFIG:
1041                 case WLAN_EID_PEER_MGMT:
1042                 case WLAN_EID_PREQ:
1043                 case WLAN_EID_PREP:
1044                 case WLAN_EID_PERR:
1045                 case WLAN_EID_RANN:
1046                 case WLAN_EID_CHANNEL_SWITCH:
1047                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1048                 case WLAN_EID_COUNTRY:
1049                 case WLAN_EID_PWR_CONSTRAINT:
1050                 case WLAN_EID_TIMEOUT_INTERVAL:
1051                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1052                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1053                 case WLAN_EID_CHAN_SWITCH_PARAM:
1054                 case WLAN_EID_EXT_CAPABILITY:
1055                 case WLAN_EID_CHAN_SWITCH_TIMING:
1056                 case WLAN_EID_LINK_ID:
1057                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1058                 case WLAN_EID_RSNX:
1059                 case WLAN_EID_S1G_BCN_COMPAT:
1060                 case WLAN_EID_S1G_CAPABILITIES:
1061                 case WLAN_EID_S1G_OPERATION:
1062                 case WLAN_EID_AID_RESPONSE:
1063                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1064                 /*
1065                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1066                  * that if the content gets bigger it might be needed more than once
1067                  */
1068                         if (test_bit(id, seen_elems)) {
1069                                 elems->parse_error = true;
1070                                 continue;
1071                         }
1072                         break;
1073                 }
1074
1075                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1076                         crc = crc32_be(crc, pos - 2, elen + 2);
1077
1078                 elem_parse_failed = false;
1079
1080                 switch (id) {
1081                 case WLAN_EID_LINK_ID:
1082                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1083                                 elem_parse_failed = true;
1084                                 break;
1085                         }
1086                         elems->lnk_id = (void *)(pos - 2);
1087                         break;
1088                 case WLAN_EID_CHAN_SWITCH_TIMING:
1089                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1090                                 elem_parse_failed = true;
1091                                 break;
1092                         }
1093                         elems->ch_sw_timing = (void *)pos;
1094                         break;
1095                 case WLAN_EID_EXT_CAPABILITY:
1096                         elems->ext_capab = pos;
1097                         elems->ext_capab_len = elen;
1098                         break;
1099                 case WLAN_EID_SSID:
1100                         elems->ssid = pos;
1101                         elems->ssid_len = elen;
1102                         break;
1103                 case WLAN_EID_SUPP_RATES:
1104                         elems->supp_rates = pos;
1105                         elems->supp_rates_len = elen;
1106                         break;
1107                 case WLAN_EID_DS_PARAMS:
1108                         if (elen >= 1)
1109                                 elems->ds_params = pos;
1110                         else
1111                                 elem_parse_failed = true;
1112                         break;
1113                 case WLAN_EID_TIM:
1114                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1115                                 elems->tim = (void *)pos;
1116                                 elems->tim_len = elen;
1117                         } else
1118                                 elem_parse_failed = true;
1119                         break;
1120                 case WLAN_EID_VENDOR_SPECIFIC:
1121                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1122                             pos[2] == 0xf2) {
1123                                 /* Microsoft OUI (00:50:F2) */
1124
1125                                 if (calc_crc)
1126                                         crc = crc32_be(crc, pos - 2, elen + 2);
1127
1128                                 if (elen >= 5 && pos[3] == 2) {
1129                                         /* OUI Type 2 - WMM IE */
1130                                         if (pos[4] == 0) {
1131                                                 elems->wmm_info = pos;
1132                                                 elems->wmm_info_len = elen;
1133                                         } else if (pos[4] == 1) {
1134                                                 elems->wmm_param = pos;
1135                                                 elems->wmm_param_len = elen;
1136                                         }
1137                                 }
1138                         }
1139                         break;
1140                 case WLAN_EID_RSN:
1141                         elems->rsn = pos;
1142                         elems->rsn_len = elen;
1143                         break;
1144                 case WLAN_EID_ERP_INFO:
1145                         if (elen >= 1)
1146                                 elems->erp_info = pos;
1147                         else
1148                                 elem_parse_failed = true;
1149                         break;
1150                 case WLAN_EID_EXT_SUPP_RATES:
1151                         elems->ext_supp_rates = pos;
1152                         elems->ext_supp_rates_len = elen;
1153                         break;
1154                 case WLAN_EID_HT_CAPABILITY:
1155                         if (elen >= sizeof(struct ieee80211_ht_cap))
1156                                 elems->ht_cap_elem = (void *)pos;
1157                         else
1158                                 elem_parse_failed = true;
1159                         break;
1160                 case WLAN_EID_HT_OPERATION:
1161                         if (elen >= sizeof(struct ieee80211_ht_operation))
1162                                 elems->ht_operation = (void *)pos;
1163                         else
1164                                 elem_parse_failed = true;
1165                         break;
1166                 case WLAN_EID_VHT_CAPABILITY:
1167                         if (elen >= sizeof(struct ieee80211_vht_cap))
1168                                 elems->vht_cap_elem = (void *)pos;
1169                         else
1170                                 elem_parse_failed = true;
1171                         break;
1172                 case WLAN_EID_VHT_OPERATION:
1173                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1174                                 elems->vht_operation = (void *)pos;
1175                                 if (calc_crc)
1176                                         crc = crc32_be(crc, pos - 2, elen + 2);
1177                                 break;
1178                         }
1179                         elem_parse_failed = true;
1180                         break;
1181                 case WLAN_EID_OPMODE_NOTIF:
1182                         if (elen > 0) {
1183                                 elems->opmode_notif = pos;
1184                                 if (calc_crc)
1185                                         crc = crc32_be(crc, pos - 2, elen + 2);
1186                                 break;
1187                         }
1188                         elem_parse_failed = true;
1189                         break;
1190                 case WLAN_EID_MESH_ID:
1191                         elems->mesh_id = pos;
1192                         elems->mesh_id_len = elen;
1193                         break;
1194                 case WLAN_EID_MESH_CONFIG:
1195                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1196                                 elems->mesh_config = (void *)pos;
1197                         else
1198                                 elem_parse_failed = true;
1199                         break;
1200                 case WLAN_EID_PEER_MGMT:
1201                         elems->peering = pos;
1202                         elems->peering_len = elen;
1203                         break;
1204                 case WLAN_EID_MESH_AWAKE_WINDOW:
1205                         if (elen >= 2)
1206                                 elems->awake_window = (void *)pos;
1207                         break;
1208                 case WLAN_EID_PREQ:
1209                         elems->preq = pos;
1210                         elems->preq_len = elen;
1211                         break;
1212                 case WLAN_EID_PREP:
1213                         elems->prep = pos;
1214                         elems->prep_len = elen;
1215                         break;
1216                 case WLAN_EID_PERR:
1217                         elems->perr = pos;
1218                         elems->perr_len = elen;
1219                         break;
1220                 case WLAN_EID_RANN:
1221                         if (elen >= sizeof(struct ieee80211_rann_ie))
1222                                 elems->rann = (void *)pos;
1223                         else
1224                                 elem_parse_failed = true;
1225                         break;
1226                 case WLAN_EID_CHANNEL_SWITCH:
1227                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1228                                 elem_parse_failed = true;
1229                                 break;
1230                         }
1231                         elems->ch_switch_ie = (void *)pos;
1232                         break;
1233                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1234                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1235                                 elem_parse_failed = true;
1236                                 break;
1237                         }
1238                         elems->ext_chansw_ie = (void *)pos;
1239                         break;
1240                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1241                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1242                                 elem_parse_failed = true;
1243                                 break;
1244                         }
1245                         elems->sec_chan_offs = (void *)pos;
1246                         break;
1247                 case WLAN_EID_CHAN_SWITCH_PARAM:
1248                         if (elen <
1249                             sizeof(*elems->mesh_chansw_params_ie)) {
1250                                 elem_parse_failed = true;
1251                                 break;
1252                         }
1253                         elems->mesh_chansw_params_ie = (void *)pos;
1254                         break;
1255                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1256                         if (!action ||
1257                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1258                                 elem_parse_failed = true;
1259                                 break;
1260                         }
1261                         elems->wide_bw_chansw_ie = (void *)pos;
1262                         break;
1263                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1264                         if (action) {
1265                                 elem_parse_failed = true;
1266                                 break;
1267                         }
1268                         /*
1269                          * This is a bit tricky, but as we only care about
1270                          * the wide bandwidth channel switch element, so
1271                          * just parse it out manually.
1272                          */
1273                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1274                                               pos, elen);
1275                         if (ie) {
1276                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1277                                         elems->wide_bw_chansw_ie =
1278                                                 (void *)(ie + 2);
1279                                 else
1280                                         elem_parse_failed = true;
1281                         }
1282                         break;
1283                 case WLAN_EID_COUNTRY:
1284                         elems->country_elem = pos;
1285                         elems->country_elem_len = elen;
1286                         break;
1287                 case WLAN_EID_PWR_CONSTRAINT:
1288                         if (elen != 1) {
1289                                 elem_parse_failed = true;
1290                                 break;
1291                         }
1292                         elems->pwr_constr_elem = pos;
1293                         break;
1294                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1295                         /* Lots of different options exist, but we only care
1296                          * about the Dynamic Transmit Power Control element.
1297                          * First check for the Cisco OUI, then for the DTPC
1298                          * tag (0x00).
1299                          */
1300                         if (elen < 4) {
1301                                 elem_parse_failed = true;
1302                                 break;
1303                         }
1304
1305                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1306                             pos[2] != 0x96 || pos[3] != 0x00)
1307                                 break;
1308
1309                         if (elen != 6) {
1310                                 elem_parse_failed = true;
1311                                 break;
1312                         }
1313
1314                         if (calc_crc)
1315                                 crc = crc32_be(crc, pos - 2, elen + 2);
1316
1317                         elems->cisco_dtpc_elem = pos;
1318                         break;
1319                 case WLAN_EID_ADDBA_EXT:
1320                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1321                                 elem_parse_failed = true;
1322                                 break;
1323                         }
1324                         elems->addba_ext_ie = (void *)pos;
1325                         break;
1326                 case WLAN_EID_TIMEOUT_INTERVAL:
1327                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1328                                 elems->timeout_int = (void *)pos;
1329                         else
1330                                 elem_parse_failed = true;
1331                         break;
1332                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1333                         if (elen >= sizeof(*elems->max_idle_period_ie))
1334                                 elems->max_idle_period_ie = (void *)pos;
1335                         break;
1336                 case WLAN_EID_RSNX:
1337                         elems->rsnx = pos;
1338                         elems->rsnx_len = elen;
1339                         break;
1340                 case WLAN_EID_TX_POWER_ENVELOPE:
1341                         if (elen < 1 ||
1342                             elen > sizeof(struct ieee80211_tx_pwr_env))
1343                                 break;
1344
1345                         if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env))
1346                                 break;
1347
1348                         elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
1349                         elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
1350                         elems->tx_pwr_env_num++;
1351                         break;
1352                 case WLAN_EID_EXTENSION:
1353                         ieee80211_parse_extension_element(calc_crc ?
1354                                                                 &crc : NULL,
1355                                                           elem, elems);
1356                         break;
1357                 case WLAN_EID_S1G_CAPABILITIES:
1358                         if (elen >= sizeof(*elems->s1g_capab))
1359                                 elems->s1g_capab = (void *)pos;
1360                         else
1361                                 elem_parse_failed = true;
1362                         break;
1363                 case WLAN_EID_S1G_OPERATION:
1364                         if (elen == sizeof(*elems->s1g_oper))
1365                                 elems->s1g_oper = (void *)pos;
1366                         else
1367                                 elem_parse_failed = true;
1368                         break;
1369                 case WLAN_EID_S1G_BCN_COMPAT:
1370                         if (elen == sizeof(*elems->s1g_bcn_compat))
1371                                 elems->s1g_bcn_compat = (void *)pos;
1372                         else
1373                                 elem_parse_failed = true;
1374                         break;
1375                 case WLAN_EID_AID_RESPONSE:
1376                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1377                                 elems->aid_resp = (void *)pos;
1378                         else
1379                                 elem_parse_failed = true;
1380                         break;
1381                 default:
1382                         break;
1383                 }
1384
1385                 if (elem_parse_failed)
1386                         elems->parse_error = true;
1387                 else
1388                         __set_bit(id, seen_elems);
1389         }
1390
1391         if (!for_each_element_completed(elem, start, len))
1392                 elems->parse_error = true;
1393
1394         return crc;
1395 }
1396
1397 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1398                                             struct ieee802_11_elems *elems,
1399                                             const u8 *transmitter_bssid,
1400                                             const u8 *bss_bssid,
1401                                             u8 *nontransmitted_profile)
1402 {
1403         const struct element *elem, *sub;
1404         size_t profile_len = 0;
1405         bool found = false;
1406
1407         if (!bss_bssid || !transmitter_bssid)
1408                 return profile_len;
1409
1410         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1411                 if (elem->datalen < 2)
1412                         continue;
1413                 if (elem->data[0] < 1 || elem->data[0] > 8)
1414                         continue;
1415
1416                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1417                         u8 new_bssid[ETH_ALEN];
1418                         const u8 *index;
1419
1420                         if (sub->id != 0 || sub->datalen < 4) {
1421                                 /* not a valid BSS profile */
1422                                 continue;
1423                         }
1424
1425                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1426                             sub->data[1] != 2) {
1427                                 /* The first element of the
1428                                  * Nontransmitted BSSID Profile is not
1429                                  * the Nontransmitted BSSID Capability
1430                                  * element.
1431                                  */
1432                                 continue;
1433                         }
1434
1435                         memset(nontransmitted_profile, 0, len);
1436                         profile_len = cfg80211_merge_profile(start, len,
1437                                                              elem,
1438                                                              sub,
1439                                                              nontransmitted_profile,
1440                                                              len);
1441
1442                         /* found a Nontransmitted BSSID Profile */
1443                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1444                                                  nontransmitted_profile,
1445                                                  profile_len);
1446                         if (!index || index[1] < 1 || index[2] == 0) {
1447                                 /* Invalid MBSSID Index element */
1448                                 continue;
1449                         }
1450
1451                         cfg80211_gen_new_bssid(transmitter_bssid,
1452                                                elem->data[0],
1453                                                index[2],
1454                                                new_bssid);
1455                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1456                                 found = true;
1457                                 elems->bssid_index_len = index[1];
1458                                 elems->bssid_index = (void *)&index[2];
1459                                 break;
1460                         }
1461                 }
1462         }
1463
1464         return found ? profile_len : 0;
1465 }
1466
1467 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len,
1468                                                     bool action, u64 filter,
1469                                                     u32 crc,
1470                                                     const u8 *transmitter_bssid,
1471                                                     const u8 *bss_bssid)
1472 {
1473         struct ieee802_11_elems *elems;
1474         const struct element *non_inherit = NULL;
1475         u8 *nontransmitted_profile;
1476         int nontransmitted_profile_len = 0;
1477
1478         elems = kzalloc(sizeof(*elems) + len, GFP_ATOMIC);
1479         if (!elems)
1480                 return NULL;
1481         elems->ie_start = start;
1482         elems->total_len = len;
1483
1484         elems->scratch_len = len;
1485         elems->scratch_pos = elems->scratch;
1486
1487         nontransmitted_profile = elems->scratch_pos;
1488         nontransmitted_profile_len =
1489                 ieee802_11_find_bssid_profile(start, len, elems,
1490                                               transmitter_bssid,
1491                                               bss_bssid,
1492                                               nontransmitted_profile);
1493         non_inherit =
1494                 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1495                                        nontransmitted_profile,
1496                                        nontransmitted_profile_len);
1497
1498         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1499                                           crc, non_inherit);
1500
1501         /* Override with nontransmitted profile, if found */
1502         if (nontransmitted_profile_len)
1503                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1504                                             nontransmitted_profile_len,
1505                                             action, elems, 0, 0, NULL);
1506
1507         if (elems->tim && !elems->parse_error) {
1508                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1509
1510                 elems->dtim_period = tim_ie->dtim_period;
1511                 elems->dtim_count = tim_ie->dtim_count;
1512         }
1513
1514         /* Override DTIM period and count if needed */
1515         if (elems->bssid_index &&
1516             elems->bssid_index_len >=
1517             offsetofend(struct ieee80211_bssid_index, dtim_period))
1518                 elems->dtim_period = elems->bssid_index->dtim_period;
1519
1520         if (elems->bssid_index &&
1521             elems->bssid_index_len >=
1522             offsetofend(struct ieee80211_bssid_index, dtim_count))
1523                 elems->dtim_count = elems->bssid_index->dtim_count;
1524
1525         elems->crc = crc;
1526
1527         return elems;
1528 }
1529
1530 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1531                                            struct ieee80211_tx_queue_params
1532                                            *qparam, int ac)
1533 {
1534         struct ieee80211_chanctx_conf *chanctx_conf;
1535         const struct ieee80211_reg_rule *rrule;
1536         const struct ieee80211_wmm_ac *wmm_ac;
1537         u16 center_freq = 0;
1538
1539         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1540             sdata->vif.type != NL80211_IFTYPE_STATION)
1541                 return;
1542
1543         rcu_read_lock();
1544         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1545         if (chanctx_conf)
1546                 center_freq = chanctx_conf->def.chan->center_freq;
1547
1548         if (!center_freq) {
1549                 rcu_read_unlock();
1550                 return;
1551         }
1552
1553         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1554
1555         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1556                 rcu_read_unlock();
1557                 return;
1558         }
1559
1560         if (sdata->vif.type == NL80211_IFTYPE_AP)
1561                 wmm_ac = &rrule->wmm_rule.ap[ac];
1562         else
1563                 wmm_ac = &rrule->wmm_rule.client[ac];
1564         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1565         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1566         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1567         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1568         rcu_read_unlock();
1569 }
1570
1571 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1572                                bool bss_notify, bool enable_qos)
1573 {
1574         struct ieee80211_local *local = sdata->local;
1575         struct ieee80211_tx_queue_params qparam;
1576         struct ieee80211_chanctx_conf *chanctx_conf;
1577         int ac;
1578         bool use_11b;
1579         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1580         int aCWmin, aCWmax;
1581
1582         if (!local->ops->conf_tx)
1583                 return;
1584
1585         if (local->hw.queues < IEEE80211_NUM_ACS)
1586                 return;
1587
1588         memset(&qparam, 0, sizeof(qparam));
1589
1590         rcu_read_lock();
1591         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1592         use_11b = (chanctx_conf &&
1593                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1594                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1595         rcu_read_unlock();
1596
1597         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1598
1599         /* Set defaults according to 802.11-2007 Table 7-37 */
1600         aCWmax = 1023;
1601         if (use_11b)
1602                 aCWmin = 31;
1603         else
1604                 aCWmin = 15;
1605
1606         /* Confiure old 802.11b/g medium access rules. */
1607         qparam.cw_max = aCWmax;
1608         qparam.cw_min = aCWmin;
1609         qparam.txop = 0;
1610         qparam.aifs = 2;
1611
1612         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1613                 /* Update if QoS is enabled. */
1614                 if (enable_qos) {
1615                         switch (ac) {
1616                         case IEEE80211_AC_BK:
1617                                 qparam.cw_max = aCWmax;
1618                                 qparam.cw_min = aCWmin;
1619                                 qparam.txop = 0;
1620                                 if (is_ocb)
1621                                         qparam.aifs = 9;
1622                                 else
1623                                         qparam.aifs = 7;
1624                                 break;
1625                         /* never happens but let's not leave undefined */
1626                         default:
1627                         case IEEE80211_AC_BE:
1628                                 qparam.cw_max = aCWmax;
1629                                 qparam.cw_min = aCWmin;
1630                                 qparam.txop = 0;
1631                                 if (is_ocb)
1632                                         qparam.aifs = 6;
1633                                 else
1634                                         qparam.aifs = 3;
1635                                 break;
1636                         case IEEE80211_AC_VI:
1637                                 qparam.cw_max = aCWmin;
1638                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1639                                 if (is_ocb)
1640                                         qparam.txop = 0;
1641                                 else if (use_11b)
1642                                         qparam.txop = 6016/32;
1643                                 else
1644                                         qparam.txop = 3008/32;
1645
1646                                 if (is_ocb)
1647                                         qparam.aifs = 3;
1648                                 else
1649                                         qparam.aifs = 2;
1650                                 break;
1651                         case IEEE80211_AC_VO:
1652                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1653                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1654                                 if (is_ocb)
1655                                         qparam.txop = 0;
1656                                 else if (use_11b)
1657                                         qparam.txop = 3264/32;
1658                                 else
1659                                         qparam.txop = 1504/32;
1660                                 qparam.aifs = 2;
1661                                 break;
1662                         }
1663                 }
1664                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1665
1666                 qparam.uapsd = false;
1667
1668                 sdata->tx_conf[ac] = qparam;
1669                 drv_conf_tx(local, sdata, ac, &qparam);
1670         }
1671
1672         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1673             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1674             sdata->vif.type != NL80211_IFTYPE_NAN) {
1675                 sdata->vif.bss_conf.qos = enable_qos;
1676                 if (bss_notify)
1677                         ieee80211_bss_info_change_notify(sdata,
1678                                                          BSS_CHANGED_QOS);
1679         }
1680 }
1681
1682 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1683                          u16 transaction, u16 auth_alg, u16 status,
1684                          const u8 *extra, size_t extra_len, const u8 *da,
1685                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1686                          u32 tx_flags)
1687 {
1688         struct ieee80211_local *local = sdata->local;
1689         struct sk_buff *skb;
1690         struct ieee80211_mgmt *mgmt;
1691         int err;
1692
1693         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1694         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1695                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1696         if (!skb)
1697                 return;
1698
1699         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1700
1701         mgmt = skb_put_zero(skb, 24 + 6);
1702         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1703                                           IEEE80211_STYPE_AUTH);
1704         memcpy(mgmt->da, da, ETH_ALEN);
1705         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1706         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1707         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1708         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1709         mgmt->u.auth.status_code = cpu_to_le16(status);
1710         if (extra)
1711                 skb_put_data(skb, extra, extra_len);
1712
1713         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1714                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1715                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1716                 if (WARN_ON(err)) {
1717                         kfree_skb(skb);
1718                         return;
1719                 }
1720         }
1721
1722         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1723                                         tx_flags;
1724         ieee80211_tx_skb(sdata, skb);
1725 }
1726
1727 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1728                                     const u8 *da, const u8 *bssid,
1729                                     u16 stype, u16 reason,
1730                                     bool send_frame, u8 *frame_buf)
1731 {
1732         struct ieee80211_local *local = sdata->local;
1733         struct sk_buff *skb;
1734         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1735
1736         /* build frame */
1737         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1738         mgmt->duration = 0; /* initialize only */
1739         mgmt->seq_ctrl = 0; /* initialize only */
1740         memcpy(mgmt->da, da, ETH_ALEN);
1741         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1742         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1743         /* u.deauth.reason_code == u.disassoc.reason_code */
1744         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1745
1746         if (send_frame) {
1747                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1748                                     IEEE80211_DEAUTH_FRAME_LEN);
1749                 if (!skb)
1750                         return;
1751
1752                 skb_reserve(skb, local->hw.extra_tx_headroom);
1753
1754                 /* copy in frame */
1755                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1756
1757                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1758                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1759                         IEEE80211_SKB_CB(skb)->flags |=
1760                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1761
1762                 ieee80211_tx_skb(sdata, skb);
1763         }
1764 }
1765
1766 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1767 {
1768         if ((end - pos) < 5)
1769                 return pos;
1770
1771         *pos++ = WLAN_EID_EXTENSION;
1772         *pos++ = 1 + sizeof(cap);
1773         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1774         memcpy(pos, &cap, sizeof(cap));
1775
1776         return pos + 2;
1777 }
1778
1779 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1780                                          u8 *buffer, size_t buffer_len,
1781                                          const u8 *ie, size_t ie_len,
1782                                          enum nl80211_band band,
1783                                          u32 rate_mask,
1784                                          struct cfg80211_chan_def *chandef,
1785                                          size_t *offset, u32 flags)
1786 {
1787         struct ieee80211_local *local = sdata->local;
1788         struct ieee80211_supported_band *sband;
1789         const struct ieee80211_sta_he_cap *he_cap;
1790         u8 *pos = buffer, *end = buffer + buffer_len;
1791         size_t noffset;
1792         int supp_rates_len, i;
1793         u8 rates[32];
1794         int num_rates;
1795         int ext_rates_len;
1796         int shift;
1797         u32 rate_flags;
1798         bool have_80mhz = false;
1799
1800         *offset = 0;
1801
1802         sband = local->hw.wiphy->bands[band];
1803         if (WARN_ON_ONCE(!sband))
1804                 return 0;
1805
1806         rate_flags = ieee80211_chandef_rate_flags(chandef);
1807         shift = ieee80211_chandef_get_shift(chandef);
1808
1809         num_rates = 0;
1810         for (i = 0; i < sband->n_bitrates; i++) {
1811                 if ((BIT(i) & rate_mask) == 0)
1812                         continue; /* skip rate */
1813                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1814                         continue;
1815
1816                 rates[num_rates++] =
1817                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1818                                           (1 << shift) * 5);
1819         }
1820
1821         supp_rates_len = min_t(int, num_rates, 8);
1822
1823         if (end - pos < 2 + supp_rates_len)
1824                 goto out_err;
1825         *pos++ = WLAN_EID_SUPP_RATES;
1826         *pos++ = supp_rates_len;
1827         memcpy(pos, rates, supp_rates_len);
1828         pos += supp_rates_len;
1829
1830         /* insert "request information" if in custom IEs */
1831         if (ie && ie_len) {
1832                 static const u8 before_extrates[] = {
1833                         WLAN_EID_SSID,
1834                         WLAN_EID_SUPP_RATES,
1835                         WLAN_EID_REQUEST,
1836                 };
1837                 noffset = ieee80211_ie_split(ie, ie_len,
1838                                              before_extrates,
1839                                              ARRAY_SIZE(before_extrates),
1840                                              *offset);
1841                 if (end - pos < noffset - *offset)
1842                         goto out_err;
1843                 memcpy(pos, ie + *offset, noffset - *offset);
1844                 pos += noffset - *offset;
1845                 *offset = noffset;
1846         }
1847
1848         ext_rates_len = num_rates - supp_rates_len;
1849         if (ext_rates_len > 0) {
1850                 if (end - pos < 2 + ext_rates_len)
1851                         goto out_err;
1852                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1853                 *pos++ = ext_rates_len;
1854                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1855                 pos += ext_rates_len;
1856         }
1857
1858         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1859                 if (end - pos < 3)
1860                         goto out_err;
1861                 *pos++ = WLAN_EID_DS_PARAMS;
1862                 *pos++ = 1;
1863                 *pos++ = ieee80211_frequency_to_channel(
1864                                 chandef->chan->center_freq);
1865         }
1866
1867         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1868                 goto done;
1869
1870         /* insert custom IEs that go before HT */
1871         if (ie && ie_len) {
1872                 static const u8 before_ht[] = {
1873                         /*
1874                          * no need to list the ones split off already
1875                          * (or generated here)
1876                          */
1877                         WLAN_EID_DS_PARAMS,
1878                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1879                 };
1880                 noffset = ieee80211_ie_split(ie, ie_len,
1881                                              before_ht, ARRAY_SIZE(before_ht),
1882                                              *offset);
1883                 if (end - pos < noffset - *offset)
1884                         goto out_err;
1885                 memcpy(pos, ie + *offset, noffset - *offset);
1886                 pos += noffset - *offset;
1887                 *offset = noffset;
1888         }
1889
1890         if (sband->ht_cap.ht_supported) {
1891                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1892                         goto out_err;
1893                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1894                                                 sband->ht_cap.cap);
1895         }
1896
1897         /* insert custom IEs that go before VHT */
1898         if (ie && ie_len) {
1899                 static const u8 before_vht[] = {
1900                         /*
1901                          * no need to list the ones split off already
1902                          * (or generated here)
1903                          */
1904                         WLAN_EID_BSS_COEX_2040,
1905                         WLAN_EID_EXT_CAPABILITY,
1906                         WLAN_EID_SSID_LIST,
1907                         WLAN_EID_CHANNEL_USAGE,
1908                         WLAN_EID_INTERWORKING,
1909                         WLAN_EID_MESH_ID,
1910                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1911                 };
1912                 noffset = ieee80211_ie_split(ie, ie_len,
1913                                              before_vht, ARRAY_SIZE(before_vht),
1914                                              *offset);
1915                 if (end - pos < noffset - *offset)
1916                         goto out_err;
1917                 memcpy(pos, ie + *offset, noffset - *offset);
1918                 pos += noffset - *offset;
1919                 *offset = noffset;
1920         }
1921
1922         /* Check if any channel in this sband supports at least 80 MHz */
1923         for (i = 0; i < sband->n_channels; i++) {
1924                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1925                                                 IEEE80211_CHAN_NO_80MHZ))
1926                         continue;
1927
1928                 have_80mhz = true;
1929                 break;
1930         }
1931
1932         if (sband->vht_cap.vht_supported && have_80mhz) {
1933                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1934                         goto out_err;
1935                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1936                                                  sband->vht_cap.cap);
1937         }
1938
1939         /* insert custom IEs that go before HE */
1940         if (ie && ie_len) {
1941                 static const u8 before_he[] = {
1942                         /*
1943                          * no need to list the ones split off before VHT
1944                          * or generated here
1945                          */
1946                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1947                         WLAN_EID_AP_CSN,
1948                         /* TODO: add 11ah/11aj/11ak elements */
1949                 };
1950                 noffset = ieee80211_ie_split(ie, ie_len,
1951                                              before_he, ARRAY_SIZE(before_he),
1952                                              *offset);
1953                 if (end - pos < noffset - *offset)
1954                         goto out_err;
1955                 memcpy(pos, ie + *offset, noffset - *offset);
1956                 pos += noffset - *offset;
1957                 *offset = noffset;
1958         }
1959
1960         he_cap = ieee80211_get_he_iftype_cap(sband,
1961                                              ieee80211_vif_type_p2p(&sdata->vif));
1962         if (he_cap &&
1963             cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1964                                          IEEE80211_CHAN_NO_HE)) {
1965                 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
1966                 if (!pos)
1967                         goto out_err;
1968         }
1969
1970         if (cfg80211_any_usable_channels(local->hw.wiphy,
1971                                          BIT(NL80211_BAND_6GHZ),
1972                                          IEEE80211_CHAN_NO_HE)) {
1973                 struct ieee80211_supported_band *sband6;
1974
1975                 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
1976                 he_cap = ieee80211_get_he_iftype_cap(sband6,
1977                                 ieee80211_vif_type_p2p(&sdata->vif));
1978
1979                 if (he_cap) {
1980                         enum nl80211_iftype iftype =
1981                                 ieee80211_vif_type_p2p(&sdata->vif);
1982                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1983
1984                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1985                 }
1986         }
1987
1988         /*
1989          * If adding more here, adjust code in main.c
1990          * that calculates local->scan_ies_len.
1991          */
1992
1993         return pos - buffer;
1994  out_err:
1995         WARN_ONCE(1, "not enough space for preq IEs\n");
1996  done:
1997         return pos - buffer;
1998 }
1999
2000 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
2001                              size_t buffer_len,
2002                              struct ieee80211_scan_ies *ie_desc,
2003                              const u8 *ie, size_t ie_len,
2004                              u8 bands_used, u32 *rate_masks,
2005                              struct cfg80211_chan_def *chandef,
2006                              u32 flags)
2007 {
2008         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
2009         int i;
2010
2011         memset(ie_desc, 0, sizeof(*ie_desc));
2012
2013         for (i = 0; i < NUM_NL80211_BANDS; i++) {
2014                 if (bands_used & BIT(i)) {
2015                         pos += ieee80211_build_preq_ies_band(sdata,
2016                                                              buffer + pos,
2017                                                              buffer_len - pos,
2018                                                              ie, ie_len, i,
2019                                                              rate_masks[i],
2020                                                              chandef,
2021                                                              &custom_ie_offset,
2022                                                              flags);
2023                         ie_desc->ies[i] = buffer + old_pos;
2024                         ie_desc->len[i] = pos - old_pos;
2025                         old_pos = pos;
2026                 }
2027         }
2028
2029         /* add any remaining custom IEs */
2030         if (ie && ie_len) {
2031                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2032                               "not enough space for preq custom IEs\n"))
2033                         return pos;
2034                 memcpy(buffer + pos, ie + custom_ie_offset,
2035                        ie_len - custom_ie_offset);
2036                 ie_desc->common_ies = buffer + pos;
2037                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2038                 pos += ie_len - custom_ie_offset;
2039         }
2040
2041         return pos;
2042 };
2043
2044 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2045                                           const u8 *src, const u8 *dst,
2046                                           u32 ratemask,
2047                                           struct ieee80211_channel *chan,
2048                                           const u8 *ssid, size_t ssid_len,
2049                                           const u8 *ie, size_t ie_len,
2050                                           u32 flags)
2051 {
2052         struct ieee80211_local *local = sdata->local;
2053         struct cfg80211_chan_def chandef;
2054         struct sk_buff *skb;
2055         struct ieee80211_mgmt *mgmt;
2056         int ies_len;
2057         u32 rate_masks[NUM_NL80211_BANDS] = {};
2058         struct ieee80211_scan_ies dummy_ie_desc;
2059
2060         /*
2061          * Do not send DS Channel parameter for directed probe requests
2062          * in order to maximize the chance that we get a response.  Some
2063          * badly-behaved APs don't respond when this parameter is included.
2064          */
2065         chandef.width = sdata->vif.bss_conf.chandef.width;
2066         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2067                 chandef.chan = NULL;
2068         else
2069                 chandef.chan = chan;
2070
2071         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2072                                      100 + ie_len);
2073         if (!skb)
2074                 return NULL;
2075
2076         rate_masks[chan->band] = ratemask;
2077         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2078                                            skb_tailroom(skb), &dummy_ie_desc,
2079                                            ie, ie_len, BIT(chan->band),
2080                                            rate_masks, &chandef, flags);
2081         skb_put(skb, ies_len);
2082
2083         if (dst) {
2084                 mgmt = (struct ieee80211_mgmt *) skb->data;
2085                 memcpy(mgmt->da, dst, ETH_ALEN);
2086                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2087         }
2088
2089         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2090
2091         return skb;
2092 }
2093
2094 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2095                             struct ieee802_11_elems *elems,
2096                             enum nl80211_band band, u32 *basic_rates)
2097 {
2098         struct ieee80211_supported_band *sband;
2099         size_t num_rates;
2100         u32 supp_rates, rate_flags;
2101         int i, j, shift;
2102
2103         sband = sdata->local->hw.wiphy->bands[band];
2104         if (WARN_ON(!sband))
2105                 return 1;
2106
2107         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2108         shift = ieee80211_vif_get_shift(&sdata->vif);
2109
2110         num_rates = sband->n_bitrates;
2111         supp_rates = 0;
2112         for (i = 0; i < elems->supp_rates_len +
2113                      elems->ext_supp_rates_len; i++) {
2114                 u8 rate = 0;
2115                 int own_rate;
2116                 bool is_basic;
2117                 if (i < elems->supp_rates_len)
2118                         rate = elems->supp_rates[i];
2119                 else if (elems->ext_supp_rates)
2120                         rate = elems->ext_supp_rates
2121                                 [i - elems->supp_rates_len];
2122                 own_rate = 5 * (rate & 0x7f);
2123                 is_basic = !!(rate & 0x80);
2124
2125                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2126                         continue;
2127
2128                 for (j = 0; j < num_rates; j++) {
2129                         int brate;
2130                         if ((rate_flags & sband->bitrates[j].flags)
2131                             != rate_flags)
2132                                 continue;
2133
2134                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2135                                              1 << shift);
2136
2137                         if (brate == own_rate) {
2138                                 supp_rates |= BIT(j);
2139                                 if (basic_rates && is_basic)
2140                                         *basic_rates |= BIT(j);
2141                         }
2142                 }
2143         }
2144         return supp_rates;
2145 }
2146
2147 void ieee80211_stop_device(struct ieee80211_local *local)
2148 {
2149         ieee80211_led_radio(local, false);
2150         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2151
2152         cancel_work_sync(&local->reconfig_filter);
2153
2154         flush_workqueue(local->workqueue);
2155         drv_stop(local);
2156 }
2157
2158 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2159                                            bool aborted)
2160 {
2161         /* It's possible that we don't handle the scan completion in
2162          * time during suspend, so if it's still marked as completed
2163          * here, queue the work and flush it to clean things up.
2164          * Instead of calling the worker function directly here, we
2165          * really queue it to avoid potential races with other flows
2166          * scheduling the same work.
2167          */
2168         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2169                 /* If coming from reconfiguration failure, abort the scan so
2170                  * we don't attempt to continue a partial HW scan - which is
2171                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2172                  * completed scan, and a 5 GHz portion is still pending.
2173                  */
2174                 if (aborted)
2175                         set_bit(SCAN_ABORTED, &local->scanning);
2176                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2177                 flush_delayed_work(&local->scan_work);
2178         }
2179 }
2180
2181 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2182 {
2183         struct ieee80211_sub_if_data *sdata;
2184         struct ieee80211_chanctx *ctx;
2185
2186         /*
2187          * We get here if during resume the device can't be restarted properly.
2188          * We might also get here if this happens during HW reset, which is a
2189          * slightly different situation and we need to drop all connections in
2190          * the latter case.
2191          *
2192          * Ask cfg80211 to turn off all interfaces, this will result in more
2193          * warnings but at least we'll then get into a clean stopped state.
2194          */
2195
2196         local->resuming = false;
2197         local->suspended = false;
2198         local->in_reconfig = false;
2199
2200         ieee80211_flush_completed_scan(local, true);
2201
2202         /* scheduled scan clearly can't be running any more, but tell
2203          * cfg80211 and clear local state
2204          */
2205         ieee80211_sched_scan_end(local);
2206
2207         list_for_each_entry(sdata, &local->interfaces, list)
2208                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2209
2210         /* Mark channel contexts as not being in the driver any more to avoid
2211          * removing them from the driver during the shutdown process...
2212          */
2213         mutex_lock(&local->chanctx_mtx);
2214         list_for_each_entry(ctx, &local->chanctx_list, list)
2215                 ctx->driver_present = false;
2216         mutex_unlock(&local->chanctx_mtx);
2217 }
2218
2219 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2220                                      struct ieee80211_sub_if_data *sdata)
2221 {
2222         struct ieee80211_chanctx_conf *conf;
2223         struct ieee80211_chanctx *ctx;
2224
2225         if (!local->use_chanctx)
2226                 return;
2227
2228         mutex_lock(&local->chanctx_mtx);
2229         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2230                                          lockdep_is_held(&local->chanctx_mtx));
2231         if (conf) {
2232                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2233                 drv_assign_vif_chanctx(local, sdata, ctx);
2234         }
2235         mutex_unlock(&local->chanctx_mtx);
2236 }
2237
2238 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2239 {
2240         struct ieee80211_local *local = sdata->local;
2241         struct sta_info *sta;
2242
2243         /* add STAs back */
2244         mutex_lock(&local->sta_mtx);
2245         list_for_each_entry(sta, &local->sta_list, list) {
2246                 enum ieee80211_sta_state state;
2247
2248                 if (!sta->uploaded || sta->sdata != sdata)
2249                         continue;
2250
2251                 for (state = IEEE80211_STA_NOTEXIST;
2252                      state < sta->sta_state; state++)
2253                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2254                                               state + 1));
2255         }
2256         mutex_unlock(&local->sta_mtx);
2257 }
2258
2259 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2260 {
2261         struct cfg80211_nan_func *func, **funcs;
2262         int res, id, i = 0;
2263
2264         res = drv_start_nan(sdata->local, sdata,
2265                             &sdata->u.nan.conf);
2266         if (WARN_ON(res))
2267                 return res;
2268
2269         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2270                         sizeof(*funcs),
2271                         GFP_KERNEL);
2272         if (!funcs)
2273                 return -ENOMEM;
2274
2275         /* Add all the functions:
2276          * This is a little bit ugly. We need to call a potentially sleeping
2277          * callback for each NAN function, so we can't hold the spinlock.
2278          */
2279         spin_lock_bh(&sdata->u.nan.func_lock);
2280
2281         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2282                 funcs[i++] = func;
2283
2284         spin_unlock_bh(&sdata->u.nan.func_lock);
2285
2286         for (i = 0; funcs[i]; i++) {
2287                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2288                 if (WARN_ON(res))
2289                         ieee80211_nan_func_terminated(&sdata->vif,
2290                                                       funcs[i]->instance_id,
2291                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2292                                                       GFP_KERNEL);
2293         }
2294
2295         kfree(funcs);
2296
2297         return 0;
2298 }
2299
2300 int ieee80211_reconfig(struct ieee80211_local *local)
2301 {
2302         struct ieee80211_hw *hw = &local->hw;
2303         struct ieee80211_sub_if_data *sdata;
2304         struct ieee80211_chanctx *ctx;
2305         struct sta_info *sta;
2306         int res, i;
2307         bool reconfig_due_to_wowlan = false;
2308         struct ieee80211_sub_if_data *sched_scan_sdata;
2309         struct cfg80211_sched_scan_request *sched_scan_req;
2310         bool sched_scan_stopped = false;
2311         bool suspended = local->suspended;
2312
2313         /* nothing to do if HW shouldn't run */
2314         if (!local->open_count)
2315                 goto wake_up;
2316
2317 #ifdef CONFIG_PM
2318         if (suspended)
2319                 local->resuming = true;
2320
2321         if (local->wowlan) {
2322                 /*
2323                  * In the wowlan case, both mac80211 and the device
2324                  * are functional when the resume op is called, so
2325                  * clear local->suspended so the device could operate
2326                  * normally (e.g. pass rx frames).
2327                  */
2328                 local->suspended = false;
2329                 res = drv_resume(local);
2330                 local->wowlan = false;
2331                 if (res < 0) {
2332                         local->resuming = false;
2333                         return res;
2334                 }
2335                 if (res == 0)
2336                         goto wake_up;
2337                 WARN_ON(res > 1);
2338                 /*
2339                  * res is 1, which means the driver requested
2340                  * to go through a regular reset on wakeup.
2341                  * restore local->suspended in this case.
2342                  */
2343                 reconfig_due_to_wowlan = true;
2344                 local->suspended = true;
2345         }
2346 #endif
2347
2348         /*
2349          * In case of hw_restart during suspend (without wowlan),
2350          * cancel restart work, as we are reconfiguring the device
2351          * anyway.
2352          * Note that restart_work is scheduled on a frozen workqueue,
2353          * so we can't deadlock in this case.
2354          */
2355         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2356                 cancel_work_sync(&local->restart_work);
2357
2358         local->started = false;
2359
2360         /*
2361          * Upon resume hardware can sometimes be goofy due to
2362          * various platform / driver / bus issues, so restarting
2363          * the device may at times not work immediately. Propagate
2364          * the error.
2365          */
2366         res = drv_start(local);
2367         if (res) {
2368                 if (suspended)
2369                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2370                 else
2371                         WARN(1, "Hardware became unavailable during restart.\n");
2372                 ieee80211_handle_reconfig_failure(local);
2373                 return res;
2374         }
2375
2376         /* setup fragmentation threshold */
2377         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2378
2379         /* setup RTS threshold */
2380         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2381
2382         /* reset coverage class */
2383         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2384
2385         ieee80211_led_radio(local, true);
2386         ieee80211_mod_tpt_led_trig(local,
2387                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2388
2389         /* add interfaces */
2390         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
2391         if (sdata) {
2392                 /* in HW restart it exists already */
2393                 WARN_ON(local->resuming);
2394                 res = drv_add_interface(local, sdata);
2395                 if (WARN_ON(res)) {
2396                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2397                         synchronize_net();
2398                         kfree(sdata);
2399                 }
2400         }
2401
2402         list_for_each_entry(sdata, &local->interfaces, list) {
2403                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2404                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2405                     ieee80211_sdata_running(sdata)) {
2406                         res = drv_add_interface(local, sdata);
2407                         if (WARN_ON(res))
2408                                 break;
2409                 }
2410         }
2411
2412         /* If adding any of the interfaces failed above, roll back and
2413          * report failure.
2414          */
2415         if (res) {
2416                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2417                                                      list)
2418                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2419                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2420                             ieee80211_sdata_running(sdata))
2421                                 drv_remove_interface(local, sdata);
2422                 ieee80211_handle_reconfig_failure(local);
2423                 return res;
2424         }
2425
2426         /* add channel contexts */
2427         if (local->use_chanctx) {
2428                 mutex_lock(&local->chanctx_mtx);
2429                 list_for_each_entry(ctx, &local->chanctx_list, list)
2430                         if (ctx->replace_state !=
2431                             IEEE80211_CHANCTX_REPLACES_OTHER)
2432                                 WARN_ON(drv_add_chanctx(local, ctx));
2433                 mutex_unlock(&local->chanctx_mtx);
2434
2435                 sdata = wiphy_dereference(local->hw.wiphy,
2436                                           local->monitor_sdata);
2437                 if (sdata && ieee80211_sdata_running(sdata))
2438                         ieee80211_assign_chanctx(local, sdata);
2439         }
2440
2441         /* reconfigure hardware */
2442         ieee80211_hw_config(local, ~0);
2443
2444         ieee80211_configure_filter(local);
2445
2446         /* Finally also reconfigure all the BSS information */
2447         list_for_each_entry(sdata, &local->interfaces, list) {
2448                 u32 changed;
2449
2450                 if (!ieee80211_sdata_running(sdata))
2451                         continue;
2452
2453                 ieee80211_assign_chanctx(local, sdata);
2454
2455                 switch (sdata->vif.type) {
2456                 case NL80211_IFTYPE_AP_VLAN:
2457                 case NL80211_IFTYPE_MONITOR:
2458                         break;
2459                 case NL80211_IFTYPE_ADHOC:
2460                         if (sdata->vif.bss_conf.ibss_joined)
2461                                 WARN_ON(drv_join_ibss(local, sdata));
2462                         fallthrough;
2463                 default:
2464                         ieee80211_reconfig_stations(sdata);
2465                         fallthrough;
2466                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2467                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2468                                 drv_conf_tx(local, sdata, i,
2469                                             &sdata->tx_conf[i]);
2470                         break;
2471                 }
2472
2473                 /* common change flags for all interface types */
2474                 changed = BSS_CHANGED_ERP_CTS_PROT |
2475                           BSS_CHANGED_ERP_PREAMBLE |
2476                           BSS_CHANGED_ERP_SLOT |
2477                           BSS_CHANGED_HT |
2478                           BSS_CHANGED_BASIC_RATES |
2479                           BSS_CHANGED_BEACON_INT |
2480                           BSS_CHANGED_BSSID |
2481                           BSS_CHANGED_CQM |
2482                           BSS_CHANGED_QOS |
2483                           BSS_CHANGED_IDLE |
2484                           BSS_CHANGED_TXPOWER |
2485                           BSS_CHANGED_MCAST_RATE;
2486
2487                 if (sdata->vif.mu_mimo_owner)
2488                         changed |= BSS_CHANGED_MU_GROUPS;
2489
2490                 switch (sdata->vif.type) {
2491                 case NL80211_IFTYPE_STATION:
2492                         changed |= BSS_CHANGED_ASSOC |
2493                                    BSS_CHANGED_ARP_FILTER |
2494                                    BSS_CHANGED_PS;
2495
2496                         /* Re-send beacon info report to the driver */
2497                         if (sdata->u.mgd.have_beacon)
2498                                 changed |= BSS_CHANGED_BEACON_INFO;
2499
2500                         if (sdata->vif.bss_conf.max_idle_period ||
2501                             sdata->vif.bss_conf.protected_keep_alive)
2502                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2503
2504                         sdata_lock(sdata);
2505                         ieee80211_bss_info_change_notify(sdata, changed);
2506                         sdata_unlock(sdata);
2507                         break;
2508                 case NL80211_IFTYPE_OCB:
2509                         changed |= BSS_CHANGED_OCB;
2510                         ieee80211_bss_info_change_notify(sdata, changed);
2511                         break;
2512                 case NL80211_IFTYPE_ADHOC:
2513                         changed |= BSS_CHANGED_IBSS;
2514                         fallthrough;
2515                 case NL80211_IFTYPE_AP:
2516                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2517
2518                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2519                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2520                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2521                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2522
2523                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2524                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2525
2526                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2527                                         drv_start_ap(local, sdata);
2528                         }
2529                         fallthrough;
2530                 case NL80211_IFTYPE_MESH_POINT:
2531                         if (sdata->vif.bss_conf.enable_beacon) {
2532                                 changed |= BSS_CHANGED_BEACON |
2533                                            BSS_CHANGED_BEACON_ENABLED;
2534                                 ieee80211_bss_info_change_notify(sdata, changed);
2535                         }
2536                         break;
2537                 case NL80211_IFTYPE_NAN:
2538                         res = ieee80211_reconfig_nan(sdata);
2539                         if (res < 0) {
2540                                 ieee80211_handle_reconfig_failure(local);
2541                                 return res;
2542                         }
2543                         break;
2544                 case NL80211_IFTYPE_AP_VLAN:
2545                 case NL80211_IFTYPE_MONITOR:
2546                 case NL80211_IFTYPE_P2P_DEVICE:
2547                         /* nothing to do */
2548                         break;
2549                 case NL80211_IFTYPE_UNSPECIFIED:
2550                 case NUM_NL80211_IFTYPES:
2551                 case NL80211_IFTYPE_P2P_CLIENT:
2552                 case NL80211_IFTYPE_P2P_GO:
2553                 case NL80211_IFTYPE_WDS:
2554                         WARN_ON(1);
2555                         break;
2556                 }
2557         }
2558
2559         ieee80211_recalc_ps(local);
2560
2561         /*
2562          * The sta might be in psm against the ap (e.g. because
2563          * this was the state before a hw restart), so we
2564          * explicitly send a null packet in order to make sure
2565          * it'll sync against the ap (and get out of psm).
2566          */
2567         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2568                 list_for_each_entry(sdata, &local->interfaces, list) {
2569                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2570                                 continue;
2571                         if (!sdata->u.mgd.associated)
2572                                 continue;
2573
2574                         ieee80211_send_nullfunc(local, sdata, false);
2575                 }
2576         }
2577
2578         /* APs are now beaconing, add back stations */
2579         mutex_lock(&local->sta_mtx);
2580         list_for_each_entry(sta, &local->sta_list, list) {
2581                 enum ieee80211_sta_state state;
2582
2583                 if (!sta->uploaded)
2584                         continue;
2585
2586                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2587                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2588                         continue;
2589
2590                 for (state = IEEE80211_STA_NOTEXIST;
2591                      state < sta->sta_state; state++)
2592                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2593                                               state + 1));
2594         }
2595         mutex_unlock(&local->sta_mtx);
2596
2597         /* add back keys */
2598         list_for_each_entry(sdata, &local->interfaces, list)
2599                 ieee80211_reenable_keys(sdata);
2600
2601         /* Reconfigure sched scan if it was interrupted by FW restart */
2602         mutex_lock(&local->mtx);
2603         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2604                                                 lockdep_is_held(&local->mtx));
2605         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2606                                                 lockdep_is_held(&local->mtx));
2607         if (sched_scan_sdata && sched_scan_req)
2608                 /*
2609                  * Sched scan stopped, but we don't want to report it. Instead,
2610                  * we're trying to reschedule. However, if more than one scan
2611                  * plan was set, we cannot reschedule since we don't know which
2612                  * scan plan was currently running (and some scan plans may have
2613                  * already finished).
2614                  */
2615                 if (sched_scan_req->n_scan_plans > 1 ||
2616                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2617                                                          sched_scan_req)) {
2618                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2619                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2620                         sched_scan_stopped = true;
2621                 }
2622         mutex_unlock(&local->mtx);
2623
2624         if (sched_scan_stopped)
2625                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2626
2627  wake_up:
2628
2629         if (local->monitors == local->open_count && local->monitors > 0)
2630                 ieee80211_add_virtual_monitor(local);
2631
2632         /*
2633          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2634          * sessions can be established after a resume.
2635          *
2636          * Also tear down aggregation sessions since reconfiguring
2637          * them in a hardware restart scenario is not easily done
2638          * right now, and the hardware will have lost information
2639          * about the sessions, but we and the AP still think they
2640          * are active. This is really a workaround though.
2641          */
2642         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2643                 mutex_lock(&local->sta_mtx);
2644
2645                 list_for_each_entry(sta, &local->sta_list, list) {
2646                         if (!local->resuming)
2647                                 ieee80211_sta_tear_down_BA_sessions(
2648                                                 sta, AGG_STOP_LOCAL_REQUEST);
2649                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2650                 }
2651
2652                 mutex_unlock(&local->sta_mtx);
2653         }
2654
2655         if (local->in_reconfig) {
2656                 local->in_reconfig = false;
2657                 barrier();
2658
2659                 /* Restart deferred ROCs */
2660                 mutex_lock(&local->mtx);
2661                 ieee80211_start_next_roc(local);
2662                 mutex_unlock(&local->mtx);
2663
2664                 /* Requeue all works */
2665                 list_for_each_entry(sdata, &local->interfaces, list)
2666                         ieee80211_queue_work(&local->hw, &sdata->work);
2667         }
2668
2669         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2670                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2671                                         false);
2672
2673         /*
2674          * If this is for hw restart things are still running.
2675          * We may want to change that later, however.
2676          */
2677         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2678                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2679
2680         if (!suspended)
2681                 return 0;
2682
2683 #ifdef CONFIG_PM
2684         /* first set suspended false, then resuming */
2685         local->suspended = false;
2686         mb();
2687         local->resuming = false;
2688
2689         ieee80211_flush_completed_scan(local, false);
2690
2691         if (local->open_count && !reconfig_due_to_wowlan)
2692                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2693
2694         list_for_each_entry(sdata, &local->interfaces, list) {
2695                 if (!ieee80211_sdata_running(sdata))
2696                         continue;
2697                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2698                         ieee80211_sta_restart(sdata);
2699         }
2700
2701         mod_timer(&local->sta_cleanup, jiffies + 1);
2702 #else
2703         WARN_ON(1);
2704 #endif
2705
2706         return 0;
2707 }
2708
2709 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2710 {
2711         struct ieee80211_sub_if_data *sdata;
2712         struct ieee80211_local *local;
2713         struct ieee80211_key *key;
2714
2715         if (WARN_ON(!vif))
2716                 return;
2717
2718         sdata = vif_to_sdata(vif);
2719         local = sdata->local;
2720
2721         if (WARN_ON(!local->resuming))
2722                 return;
2723
2724         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2725                 return;
2726
2727         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2728
2729         mutex_lock(&local->key_mtx);
2730         list_for_each_entry(key, &sdata->key_list, list)
2731                 key->flags |= KEY_FLAG_TAINTED;
2732         mutex_unlock(&local->key_mtx);
2733 }
2734 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2735
2736 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2737 {
2738         struct ieee80211_local *local = sdata->local;
2739         struct ieee80211_chanctx_conf *chanctx_conf;
2740         struct ieee80211_chanctx *chanctx;
2741
2742         mutex_lock(&local->chanctx_mtx);
2743
2744         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2745                                         lockdep_is_held(&local->chanctx_mtx));
2746
2747         /*
2748          * This function can be called from a work, thus it may be possible
2749          * that the chanctx_conf is removed (due to a disconnection, for
2750          * example).
2751          * So nothing should be done in such case.
2752          */
2753         if (!chanctx_conf)
2754                 goto unlock;
2755
2756         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2757         ieee80211_recalc_smps_chanctx(local, chanctx);
2758  unlock:
2759         mutex_unlock(&local->chanctx_mtx);
2760 }
2761
2762 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2763 {
2764         struct ieee80211_local *local = sdata->local;
2765         struct ieee80211_chanctx_conf *chanctx_conf;
2766         struct ieee80211_chanctx *chanctx;
2767
2768         mutex_lock(&local->chanctx_mtx);
2769
2770         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2771                                         lockdep_is_held(&local->chanctx_mtx));
2772
2773         if (WARN_ON_ONCE(!chanctx_conf))
2774                 goto unlock;
2775
2776         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2777         ieee80211_recalc_chanctx_min_def(local, chanctx);
2778  unlock:
2779         mutex_unlock(&local->chanctx_mtx);
2780 }
2781
2782 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2783 {
2784         size_t pos = offset;
2785
2786         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2787                 pos += 2 + ies[pos + 1];
2788
2789         return pos;
2790 }
2791
2792 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2793                                             int rssi_min_thold,
2794                                             int rssi_max_thold)
2795 {
2796         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2797
2798         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2799                 return;
2800
2801         /*
2802          * Scale up threshold values before storing it, as the RSSI averaging
2803          * algorithm uses a scaled up value as well. Change this scaling
2804          * factor if the RSSI averaging algorithm changes.
2805          */
2806         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2807         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2808 }
2809
2810 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2811                                     int rssi_min_thold,
2812                                     int rssi_max_thold)
2813 {
2814         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2815
2816         WARN_ON(rssi_min_thold == rssi_max_thold ||
2817                 rssi_min_thold > rssi_max_thold);
2818
2819         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2820                                        rssi_max_thold);
2821 }
2822 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2823
2824 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2825 {
2826         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2827
2828         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2829 }
2830 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2831
2832 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2833                               u16 cap)
2834 {
2835         __le16 tmp;
2836
2837         *pos++ = WLAN_EID_HT_CAPABILITY;
2838         *pos++ = sizeof(struct ieee80211_ht_cap);
2839         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2840
2841         /* capability flags */
2842         tmp = cpu_to_le16(cap);
2843         memcpy(pos, &tmp, sizeof(u16));
2844         pos += sizeof(u16);
2845
2846         /* AMPDU parameters */
2847         *pos++ = ht_cap->ampdu_factor |
2848                  (ht_cap->ampdu_density <<
2849                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2850
2851         /* MCS set */
2852         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2853         pos += sizeof(ht_cap->mcs);
2854
2855         /* extended capabilities */
2856         pos += sizeof(__le16);
2857
2858         /* BF capabilities */
2859         pos += sizeof(__le32);
2860
2861         /* antenna selection */
2862         pos += sizeof(u8);
2863
2864         return pos;
2865 }
2866
2867 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2868                                u32 cap)
2869 {
2870         __le32 tmp;
2871
2872         *pos++ = WLAN_EID_VHT_CAPABILITY;
2873         *pos++ = sizeof(struct ieee80211_vht_cap);
2874         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2875
2876         /* capability flags */
2877         tmp = cpu_to_le32(cap);
2878         memcpy(pos, &tmp, sizeof(u32));
2879         pos += sizeof(u32);
2880
2881         /* VHT MCS set */
2882         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2883         pos += sizeof(vht_cap->vht_mcs);
2884
2885         return pos;
2886 }
2887
2888 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2889 {
2890         const struct ieee80211_sta_he_cap *he_cap;
2891         struct ieee80211_supported_band *sband;
2892         u8 n;
2893
2894         sband = ieee80211_get_sband(sdata);
2895         if (!sband)
2896                 return 0;
2897
2898         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2899         if (!he_cap)
2900                 return 0;
2901
2902         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2903         return 2 + 1 +
2904                sizeof(he_cap->he_cap_elem) + n +
2905                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2906                                      he_cap->he_cap_elem.phy_cap_info);
2907 }
2908
2909 u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
2910                               const struct ieee80211_sta_he_cap *he_cap,
2911                               u8 *end)
2912 {
2913         struct ieee80211_he_cap_elem elem;
2914         u8 n;
2915         u8 ie_len;
2916         u8 *orig_pos = pos;
2917
2918         /* Make sure we have place for the IE */
2919         /*
2920          * TODO: the 1 added is because this temporarily is under the EXTENSION
2921          * IE. Get rid of it when it moves.
2922          */
2923         if (!he_cap)
2924                 return orig_pos;
2925
2926         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2927         elem = he_cap->he_cap_elem;
2928
2929         if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
2930                 elem.phy_cap_info[0] &=
2931                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2932                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2933
2934         if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
2935                 elem.phy_cap_info[0] &=
2936                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
2937
2938         if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
2939                 elem.phy_cap_info[0] &=
2940                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
2941
2942         n = ieee80211_he_mcs_nss_size(&elem);
2943         ie_len = 2 + 1 +
2944                  sizeof(he_cap->he_cap_elem) + n +
2945                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2946                                        he_cap->he_cap_elem.phy_cap_info);
2947
2948         if ((end - pos) < ie_len)
2949                 return orig_pos;
2950
2951         *pos++ = WLAN_EID_EXTENSION;
2952         pos++; /* We'll set the size later below */
2953         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2954
2955         /* Fixed data */
2956         memcpy(pos, &elem, sizeof(elem));
2957         pos += sizeof(elem);
2958
2959         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2960         pos += n;
2961
2962         /* Check if PPE Threshold should be present */
2963         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2964              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2965                 goto end;
2966
2967         /*
2968          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2969          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2970          */
2971         n = hweight8(he_cap->ppe_thres[0] &
2972                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2973         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2974                    IEEE80211_PPE_THRES_NSS_POS));
2975
2976         /*
2977          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2978          * total size.
2979          */
2980         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2981         n = DIV_ROUND_UP(n, 8);
2982
2983         /* Copy PPE Thresholds */
2984         memcpy(pos, &he_cap->ppe_thres, n);
2985         pos += n;
2986
2987 end:
2988         orig_pos[1] = (pos - orig_pos) - 2;
2989         return pos;
2990 }
2991
2992 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2993                                     struct sk_buff *skb)
2994 {
2995         struct ieee80211_supported_band *sband;
2996         const struct ieee80211_sband_iftype_data *iftd;
2997         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2998         u8 *pos;
2999         u16 cap;
3000
3001         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
3002                                           BIT(NL80211_BAND_6GHZ),
3003                                           IEEE80211_CHAN_NO_HE))
3004                 return;
3005
3006         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3007
3008         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
3009         if (!iftd)
3010                 return;
3011
3012         /* Check for device HE 6 GHz capability before adding element */
3013         if (!iftd->he_6ghz_capa.capa)
3014                 return;
3015
3016         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
3017         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
3018
3019         switch (sdata->smps_mode) {
3020         case IEEE80211_SMPS_AUTOMATIC:
3021         case IEEE80211_SMPS_NUM_MODES:
3022                 WARN_ON(1);
3023                 fallthrough;
3024         case IEEE80211_SMPS_OFF:
3025                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
3026                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3027                 break;
3028         case IEEE80211_SMPS_STATIC:
3029                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
3030                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3031                 break;
3032         case IEEE80211_SMPS_DYNAMIC:
3033                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
3034                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
3035                 break;
3036         }
3037
3038         pos = skb_put(skb, 2 + 1 + sizeof(cap));
3039         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3040                                     pos + 2 + 1 + sizeof(cap));
3041 }
3042
3043 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3044                                const struct cfg80211_chan_def *chandef,
3045                                u16 prot_mode, bool rifs_mode)
3046 {
3047         struct ieee80211_ht_operation *ht_oper;
3048         /* Build HT Information */
3049         *pos++ = WLAN_EID_HT_OPERATION;
3050         *pos++ = sizeof(struct ieee80211_ht_operation);
3051         ht_oper = (struct ieee80211_ht_operation *)pos;
3052         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3053                                         chandef->chan->center_freq);
3054         switch (chandef->width) {
3055         case NL80211_CHAN_WIDTH_160:
3056         case NL80211_CHAN_WIDTH_80P80:
3057         case NL80211_CHAN_WIDTH_80:
3058         case NL80211_CHAN_WIDTH_40:
3059                 if (chandef->center_freq1 > chandef->chan->center_freq)
3060                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3061                 else
3062                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3063                 break;
3064         default:
3065                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3066                 break;
3067         }
3068         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3069             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3070             chandef->width != NL80211_CHAN_WIDTH_20)
3071                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3072
3073         if (rifs_mode)
3074                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3075
3076         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3077         ht_oper->stbc_param = 0x0000;
3078
3079         /* It seems that Basic MCS set and Supported MCS set
3080            are identical for the first 10 bytes */
3081         memset(&ht_oper->basic_set, 0, 16);
3082         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3083
3084         return pos + sizeof(struct ieee80211_ht_operation);
3085 }
3086
3087 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3088                                    const struct cfg80211_chan_def *chandef)
3089 {
3090         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3091         *pos++ = 3;                                     /* IE length */
3092         /* New channel width */
3093         switch (chandef->width) {
3094         case NL80211_CHAN_WIDTH_80:
3095                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3096                 break;
3097         case NL80211_CHAN_WIDTH_160:
3098                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3099                 break;
3100         case NL80211_CHAN_WIDTH_80P80:
3101                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3102                 break;
3103         default:
3104                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3105         }
3106
3107         /* new center frequency segment 0 */
3108         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3109         /* new center frequency segment 1 */
3110         if (chandef->center_freq2)
3111                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3112         else
3113                 *pos++ = 0;
3114 }
3115
3116 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3117                                 const struct cfg80211_chan_def *chandef)
3118 {
3119         struct ieee80211_vht_operation *vht_oper;
3120
3121         *pos++ = WLAN_EID_VHT_OPERATION;
3122         *pos++ = sizeof(struct ieee80211_vht_operation);
3123         vht_oper = (struct ieee80211_vht_operation *)pos;
3124         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3125                                                         chandef->center_freq1);
3126         if (chandef->center_freq2)
3127                 vht_oper->center_freq_seg1_idx =
3128                         ieee80211_frequency_to_channel(chandef->center_freq2);
3129         else
3130                 vht_oper->center_freq_seg1_idx = 0x00;
3131
3132         switch (chandef->width) {
3133         case NL80211_CHAN_WIDTH_160:
3134                 /*
3135                  * Convert 160 MHz channel width to new style as interop
3136                  * workaround.
3137                  */
3138                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3139                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3140                 if (chandef->chan->center_freq < chandef->center_freq1)
3141                         vht_oper->center_freq_seg0_idx -= 8;
3142                 else
3143                         vht_oper->center_freq_seg0_idx += 8;
3144                 break;
3145         case NL80211_CHAN_WIDTH_80P80:
3146                 /*
3147                  * Convert 80+80 MHz channel width to new style as interop
3148                  * workaround.
3149                  */
3150                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3151                 break;
3152         case NL80211_CHAN_WIDTH_80:
3153                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3154                 break;
3155         default:
3156                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3157                 break;
3158         }
3159
3160         /* don't require special VHT peer rates */
3161         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3162
3163         return pos + sizeof(struct ieee80211_vht_operation);
3164 }
3165
3166 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3167 {
3168         struct ieee80211_he_operation *he_oper;
3169         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3170         u32 he_oper_params;
3171         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3172
3173         if (chandef->chan->band == NL80211_BAND_6GHZ)
3174                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3175
3176         *pos++ = WLAN_EID_EXTENSION;
3177         *pos++ = ie_len;
3178         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3179
3180         he_oper_params = 0;
3181         he_oper_params |= u32_encode_bits(1023, /* disabled */
3182                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3183         he_oper_params |= u32_encode_bits(1,
3184                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3185         he_oper_params |= u32_encode_bits(1,
3186                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3187         if (chandef->chan->band == NL80211_BAND_6GHZ)
3188                 he_oper_params |= u32_encode_bits(1,
3189                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3190
3191         he_oper = (struct ieee80211_he_operation *)pos;
3192         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3193
3194         /* don't require special HE peer rates */
3195         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3196         pos += sizeof(struct ieee80211_he_operation);
3197
3198         if (chandef->chan->band != NL80211_BAND_6GHZ)
3199                 goto out;
3200
3201         /* TODO add VHT operational */
3202         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3203         he_6ghz_op->minrate = 6; /* 6 Mbps */
3204         he_6ghz_op->primary =
3205                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3206         he_6ghz_op->ccfs0 =
3207                 ieee80211_frequency_to_channel(chandef->center_freq1);
3208         if (chandef->center_freq2)
3209                 he_6ghz_op->ccfs1 =
3210                         ieee80211_frequency_to_channel(chandef->center_freq2);
3211         else
3212                 he_6ghz_op->ccfs1 = 0;
3213
3214         switch (chandef->width) {
3215         case NL80211_CHAN_WIDTH_160:
3216                 /* Convert 160 MHz channel width to new style as interop
3217                  * workaround.
3218                  */
3219                 he_6ghz_op->control =
3220                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3221                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3222                 if (chandef->chan->center_freq < chandef->center_freq1)
3223                         he_6ghz_op->ccfs0 -= 8;
3224                 else
3225                         he_6ghz_op->ccfs0 += 8;
3226                 fallthrough;
3227         case NL80211_CHAN_WIDTH_80P80:
3228                 he_6ghz_op->control =
3229                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3230                 break;
3231         case NL80211_CHAN_WIDTH_80:
3232                 he_6ghz_op->control =
3233                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3234                 break;
3235         case NL80211_CHAN_WIDTH_40:
3236                 he_6ghz_op->control =
3237                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3238                 break;
3239         default:
3240                 he_6ghz_op->control =
3241                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3242                 break;
3243         }
3244
3245         pos += sizeof(struct ieee80211_he_6ghz_oper);
3246
3247 out:
3248         return pos;
3249 }
3250
3251 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3252                                struct cfg80211_chan_def *chandef)
3253 {
3254         enum nl80211_channel_type channel_type;
3255
3256         if (!ht_oper)
3257                 return false;
3258
3259         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3260         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3261                 channel_type = NL80211_CHAN_HT20;
3262                 break;
3263         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3264                 channel_type = NL80211_CHAN_HT40PLUS;
3265                 break;
3266         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3267                 channel_type = NL80211_CHAN_HT40MINUS;
3268                 break;
3269         default:
3270                 channel_type = NL80211_CHAN_NO_HT;
3271                 return false;
3272         }
3273
3274         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3275         return true;
3276 }
3277
3278 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3279                                 const struct ieee80211_vht_operation *oper,
3280                                 const struct ieee80211_ht_operation *htop,
3281                                 struct cfg80211_chan_def *chandef)
3282 {
3283         struct cfg80211_chan_def new = *chandef;
3284         int cf0, cf1;
3285         int ccfs0, ccfs1, ccfs2;
3286         int ccf0, ccf1;
3287         u32 vht_cap;
3288         bool support_80_80 = false;
3289         bool support_160 = false;
3290         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3291                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3292         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3293                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3294
3295         if (!oper || !htop)
3296                 return false;
3297
3298         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3299         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3300                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3301         support_80_80 = ((vht_cap &
3302                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3303                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3304                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3305                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3306                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3307         ccfs0 = oper->center_freq_seg0_idx;
3308         ccfs1 = oper->center_freq_seg1_idx;
3309         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3310                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3311                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3312
3313         ccf0 = ccfs0;
3314
3315         /* if not supported, parse as though we didn't understand it */
3316         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3317                 ext_nss_bw_supp = 0;
3318
3319         /*
3320          * Cf. IEEE 802.11 Table 9-250
3321          *
3322          * We really just consider that because it's inefficient to connect
3323          * at a higher bandwidth than we'll actually be able to use.
3324          */
3325         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3326         default:
3327         case 0x00:
3328                 ccf1 = 0;
3329                 support_160 = false;
3330                 support_80_80 = false;
3331                 break;
3332         case 0x01:
3333                 support_80_80 = false;
3334                 fallthrough;
3335         case 0x02:
3336         case 0x03:
3337                 ccf1 = ccfs2;
3338                 break;
3339         case 0x10:
3340                 ccf1 = ccfs1;
3341                 break;
3342         case 0x11:
3343         case 0x12:
3344                 if (!ccfs1)
3345                         ccf1 = ccfs2;
3346                 else
3347                         ccf1 = ccfs1;
3348                 break;
3349         case 0x13:
3350         case 0x20:
3351         case 0x23:
3352                 ccf1 = ccfs1;
3353                 break;
3354         }
3355
3356         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3357         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3358
3359         switch (oper->chan_width) {
3360         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3361                 /* just use HT information directly */
3362                 break;
3363         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3364                 new.width = NL80211_CHAN_WIDTH_80;
3365                 new.center_freq1 = cf0;
3366                 /* If needed, adjust based on the newer interop workaround. */
3367                 if (ccf1) {
3368                         unsigned int diff;
3369
3370                         diff = abs(ccf1 - ccf0);
3371                         if ((diff == 8) && support_160) {
3372                                 new.width = NL80211_CHAN_WIDTH_160;
3373                                 new.center_freq1 = cf1;
3374                         } else if ((diff > 8) && support_80_80) {
3375                                 new.width = NL80211_CHAN_WIDTH_80P80;
3376                                 new.center_freq2 = cf1;
3377                         }
3378                 }
3379                 break;
3380         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3381                 /* deprecated encoding */
3382                 new.width = NL80211_CHAN_WIDTH_160;
3383                 new.center_freq1 = cf0;
3384                 break;
3385         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3386                 /* deprecated encoding */
3387                 new.width = NL80211_CHAN_WIDTH_80P80;
3388                 new.center_freq1 = cf0;
3389                 new.center_freq2 = cf1;
3390                 break;
3391         default:
3392                 return false;
3393         }
3394
3395         if (!cfg80211_chandef_valid(&new))
3396                 return false;
3397
3398         *chandef = new;
3399         return true;
3400 }
3401
3402 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3403                                     const struct ieee80211_he_operation *he_oper,
3404                                     struct cfg80211_chan_def *chandef)
3405 {
3406         struct ieee80211_local *local = sdata->local;
3407         struct ieee80211_supported_band *sband;
3408         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3409         const struct ieee80211_sta_he_cap *he_cap;
3410         struct cfg80211_chan_def he_chandef = *chandef;
3411         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3412         bool support_80_80, support_160;
3413         u8 he_phy_cap;
3414         u32 freq;
3415
3416         if (chandef->chan->band != NL80211_BAND_6GHZ)
3417                 return true;
3418
3419         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3420
3421         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3422         if (!he_cap) {
3423                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3424                 return false;
3425         }
3426
3427         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3428         support_160 =
3429                 he_phy_cap &
3430                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3431         support_80_80 =
3432                 he_phy_cap &
3433                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3434
3435         if (!he_oper) {
3436                 sdata_info(sdata,
3437                            "HE is not advertised on (on %d MHz), expect issues\n",
3438                            chandef->chan->center_freq);
3439                 return false;
3440         }
3441
3442         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3443
3444         if (!he_6ghz_oper) {
3445                 sdata_info(sdata,
3446                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3447                            chandef->chan->center_freq);
3448                 return false;
3449         }
3450
3451         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3452                                               NL80211_BAND_6GHZ);
3453         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3454
3455         switch (u8_get_bits(he_6ghz_oper->control,
3456                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3457         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3458                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3459                 break;
3460         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3461                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3462                 break;
3463         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3464                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3465                 break;
3466         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3467                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3468                 if (!he_6ghz_oper->ccfs1)
3469                         break;
3470                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3471                         if (support_160)
3472                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3473                 } else {
3474                         if (support_80_80)
3475                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3476                 }
3477                 break;
3478         }
3479
3480         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3481                 he_chandef.center_freq1 =
3482                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3483                                                        NL80211_BAND_6GHZ);
3484         } else {
3485                 he_chandef.center_freq1 =
3486                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3487                                                        NL80211_BAND_6GHZ);
3488                 if (support_80_80 || support_160)
3489                         he_chandef.center_freq2 =
3490                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3491                                                                NL80211_BAND_6GHZ);
3492         }
3493
3494         if (!cfg80211_chandef_valid(&he_chandef)) {
3495                 sdata_info(sdata,
3496                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3497                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3498                            he_chandef.width,
3499                            he_chandef.center_freq1,
3500                            he_chandef.center_freq2);
3501                 return false;
3502         }
3503
3504         *chandef = he_chandef;
3505
3506         return true;
3507 }
3508
3509 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3510                                 struct cfg80211_chan_def *chandef)
3511 {
3512         u32 oper_freq;
3513
3514         if (!oper)
3515                 return false;
3516
3517         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3518         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3519                 chandef->width = NL80211_CHAN_WIDTH_1;
3520                 break;
3521         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3522                 chandef->width = NL80211_CHAN_WIDTH_2;
3523                 break;
3524         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3525                 chandef->width = NL80211_CHAN_WIDTH_4;
3526                 break;
3527         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3528                 chandef->width = NL80211_CHAN_WIDTH_8;
3529                 break;
3530         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3531                 chandef->width = NL80211_CHAN_WIDTH_16;
3532                 break;
3533         default:
3534                 return false;
3535         }
3536
3537         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3538                                                   NL80211_BAND_S1GHZ);
3539         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3540         chandef->freq1_offset = oper_freq % 1000;
3541
3542         return true;
3543 }
3544
3545 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3546                              const struct ieee80211_supported_band *sband,
3547                              const u8 *srates, int srates_len, u32 *rates)
3548 {
3549         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3550         int shift = ieee80211_chandef_get_shift(chandef);
3551         struct ieee80211_rate *br;
3552         int brate, rate, i, j, count = 0;
3553
3554         *rates = 0;
3555
3556         for (i = 0; i < srates_len; i++) {
3557                 rate = srates[i] & 0x7f;
3558
3559                 for (j = 0; j < sband->n_bitrates; j++) {
3560                         br = &sband->bitrates[j];
3561                         if ((rate_flags & br->flags) != rate_flags)
3562                                 continue;
3563
3564                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3565                         if (brate == rate) {
3566                                 *rates |= BIT(j);
3567                                 count++;
3568                                 break;
3569                         }
3570                 }
3571         }
3572         return count;
3573 }
3574
3575 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3576                             struct sk_buff *skb, bool need_basic,
3577                             enum nl80211_band band)
3578 {
3579         struct ieee80211_local *local = sdata->local;
3580         struct ieee80211_supported_band *sband;
3581         int rate, shift;
3582         u8 i, rates, *pos;
3583         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3584         u32 rate_flags;
3585
3586         shift = ieee80211_vif_get_shift(&sdata->vif);
3587         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3588         sband = local->hw.wiphy->bands[band];
3589         rates = 0;
3590         for (i = 0; i < sband->n_bitrates; i++) {
3591                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3592                         continue;
3593                 rates++;
3594         }
3595         if (rates > 8)
3596                 rates = 8;
3597
3598         if (skb_tailroom(skb) < rates + 2)
3599                 return -ENOMEM;
3600
3601         pos = skb_put(skb, rates + 2);
3602         *pos++ = WLAN_EID_SUPP_RATES;
3603         *pos++ = rates;
3604         for (i = 0; i < rates; i++) {
3605                 u8 basic = 0;
3606                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3607                         continue;
3608
3609                 if (need_basic && basic_rates & BIT(i))
3610                         basic = 0x80;
3611                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3612                                     5 * (1 << shift));
3613                 *pos++ = basic | (u8) rate;
3614         }
3615
3616         return 0;
3617 }
3618
3619 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3620                                 struct sk_buff *skb, bool need_basic,
3621                                 enum nl80211_band band)
3622 {
3623         struct ieee80211_local *local = sdata->local;
3624         struct ieee80211_supported_band *sband;
3625         int rate, shift;
3626         u8 i, exrates, *pos;
3627         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3628         u32 rate_flags;
3629
3630         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3631         shift = ieee80211_vif_get_shift(&sdata->vif);
3632
3633         sband = local->hw.wiphy->bands[band];
3634         exrates = 0;
3635         for (i = 0; i < sband->n_bitrates; i++) {
3636                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3637                         continue;
3638                 exrates++;
3639         }
3640
3641         if (exrates > 8)
3642                 exrates -= 8;
3643         else
3644                 exrates = 0;
3645
3646         if (skb_tailroom(skb) < exrates + 2)
3647                 return -ENOMEM;
3648
3649         if (exrates) {
3650                 pos = skb_put(skb, exrates + 2);
3651                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3652                 *pos++ = exrates;
3653                 for (i = 8; i < sband->n_bitrates; i++) {
3654                         u8 basic = 0;
3655                         if ((rate_flags & sband->bitrates[i].flags)
3656                             != rate_flags)
3657                                 continue;
3658                         if (need_basic && basic_rates & BIT(i))
3659                                 basic = 0x80;
3660                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3661                                             5 * (1 << shift));
3662                         *pos++ = basic | (u8) rate;
3663                 }
3664         }
3665         return 0;
3666 }
3667
3668 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3669 {
3670         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3671         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3672
3673         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3674                 /* non-managed type inferfaces */
3675                 return 0;
3676         }
3677         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3678 }
3679 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3680
3681 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3682 {
3683         if (!mcs)
3684                 return 1;
3685
3686         /* TODO: consider rx_highest */
3687
3688         if (mcs->rx_mask[3])
3689                 return 4;
3690         if (mcs->rx_mask[2])
3691                 return 3;
3692         if (mcs->rx_mask[1])
3693                 return 2;
3694         return 1;
3695 }
3696
3697 /**
3698  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3699  * @local: mac80211 hw info struct
3700  * @status: RX status
3701  * @mpdu_len: total MPDU length (including FCS)
3702  * @mpdu_offset: offset into MPDU to calculate timestamp at
3703  *
3704  * This function calculates the RX timestamp at the given MPDU offset, taking
3705  * into account what the RX timestamp was. An offset of 0 will just normalize
3706  * the timestamp to TSF at beginning of MPDU reception.
3707  */
3708 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3709                                      struct ieee80211_rx_status *status,
3710                                      unsigned int mpdu_len,
3711                                      unsigned int mpdu_offset)
3712 {
3713         u64 ts = status->mactime;
3714         struct rate_info ri;
3715         u16 rate;
3716         u8 n_ltf;
3717
3718         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3719                 return 0;
3720
3721         memset(&ri, 0, sizeof(ri));
3722
3723         ri.bw = status->bw;
3724
3725         /* Fill cfg80211 rate info */
3726         switch (status->encoding) {
3727         case RX_ENC_HE:
3728                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3729                 ri.mcs = status->rate_idx;
3730                 ri.nss = status->nss;
3731                 ri.he_ru_alloc = status->he_ru;
3732                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3733                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3734
3735                 /*
3736                  * See P802.11ax_D6.0, section 27.3.4 for
3737                  * VHT PPDU format.
3738                  */
3739                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3740                         mpdu_offset += 2;
3741                         ts += 36;
3742
3743                         /*
3744                          * TODO:
3745                          * For HE MU PPDU, add the HE-SIG-B.
3746                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3747                          * For HE TB PPDU, add 4us for the HE-STF.
3748                          * Add the HE-LTF durations - variable.
3749                          */
3750                 }
3751
3752                 break;
3753         case RX_ENC_HT:
3754                 ri.mcs = status->rate_idx;
3755                 ri.flags |= RATE_INFO_FLAGS_MCS;
3756                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3757                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3758
3759                 /*
3760                  * See P802.11REVmd_D3.0, section 19.3.2 for
3761                  * HT PPDU format.
3762                  */
3763                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3764                         mpdu_offset += 2;
3765                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3766                                 ts += 24;
3767                         else
3768                                 ts += 32;
3769
3770                         /*
3771                          * Add Data HT-LTFs per streams
3772                          * TODO: add Extension HT-LTFs, 4us per LTF
3773                          */
3774                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3775                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3776                         ts += n_ltf * 4;
3777                 }
3778
3779                 break;
3780         case RX_ENC_VHT:
3781                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3782                 ri.mcs = status->rate_idx;
3783                 ri.nss = status->nss;
3784                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3785                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3786
3787                 /*
3788                  * See P802.11REVmd_D3.0, section 21.3.2 for
3789                  * VHT PPDU format.
3790                  */
3791                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3792                         mpdu_offset += 2;
3793                         ts += 36;
3794
3795                         /*
3796                          * Add VHT-LTFs per streams
3797                          */
3798                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3799                                 ri.nss + 1 : ri.nss;
3800                         ts += 4 * n_ltf;
3801                 }
3802
3803                 break;
3804         default:
3805                 WARN_ON(1);
3806                 fallthrough;
3807         case RX_ENC_LEGACY: {
3808                 struct ieee80211_supported_band *sband;
3809                 int shift = 0;
3810                 int bitrate;
3811
3812                 switch (status->bw) {
3813                 case RATE_INFO_BW_10:
3814                         shift = 1;
3815                         break;
3816                 case RATE_INFO_BW_5:
3817                         shift = 2;
3818                         break;
3819                 }
3820
3821                 sband = local->hw.wiphy->bands[status->band];
3822                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3823                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3824
3825                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3826                         if (status->band == NL80211_BAND_5GHZ) {
3827                                 ts += 20 << shift;
3828                                 mpdu_offset += 2;
3829                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3830                                 ts += 96;
3831                         } else {
3832                                 ts += 192;
3833                         }
3834                 }
3835                 break;
3836                 }
3837         }
3838
3839         rate = cfg80211_calculate_bitrate(&ri);
3840         if (WARN_ONCE(!rate,
3841                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3842                       (unsigned long long)status->flag, status->rate_idx,
3843                       status->nss))
3844                 return 0;
3845
3846         /* rewind from end of MPDU */
3847         if (status->flag & RX_FLAG_MACTIME_END)
3848                 ts -= mpdu_len * 8 * 10 / rate;
3849
3850         ts += mpdu_offset * 8 * 10 / rate;
3851
3852         return ts;
3853 }
3854
3855 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3856 {
3857         struct ieee80211_sub_if_data *sdata;
3858         struct cfg80211_chan_def chandef;
3859
3860         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3861         lockdep_assert_wiphy(local->hw.wiphy);
3862
3863         mutex_lock(&local->mtx);
3864         list_for_each_entry(sdata, &local->interfaces, list) {
3865                 /* it might be waiting for the local->mtx, but then
3866                  * by the time it gets it, sdata->wdev.cac_started
3867                  * will no longer be true
3868                  */
3869                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3870
3871                 if (sdata->wdev.cac_started) {
3872                         chandef = sdata->vif.bss_conf.chandef;
3873                         ieee80211_vif_release_channel(sdata);
3874                         cfg80211_cac_event(sdata->dev,
3875                                            &chandef,
3876                                            NL80211_RADAR_CAC_ABORTED,
3877                                            GFP_KERNEL);
3878                 }
3879         }
3880         mutex_unlock(&local->mtx);
3881 }
3882
3883 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3884 {
3885         struct ieee80211_local *local =
3886                 container_of(work, struct ieee80211_local, radar_detected_work);
3887         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3888         struct ieee80211_chanctx *ctx;
3889         int num_chanctx = 0;
3890
3891         mutex_lock(&local->chanctx_mtx);
3892         list_for_each_entry(ctx, &local->chanctx_list, list) {
3893                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3894                         continue;
3895
3896                 num_chanctx++;
3897                 chandef = ctx->conf.def;
3898         }
3899         mutex_unlock(&local->chanctx_mtx);
3900
3901         wiphy_lock(local->hw.wiphy);
3902         ieee80211_dfs_cac_cancel(local);
3903         wiphy_unlock(local->hw.wiphy);
3904
3905         if (num_chanctx > 1)
3906                 /* XXX: multi-channel is not supported yet */
3907                 WARN_ON(1);
3908         else
3909                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3910 }
3911
3912 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3913 {
3914         struct ieee80211_local *local = hw_to_local(hw);
3915
3916         trace_api_radar_detected(local);
3917
3918         schedule_work(&local->radar_detected_work);
3919 }
3920 EXPORT_SYMBOL(ieee80211_radar_detected);
3921
3922 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3923 {
3924         u32 ret;
3925         int tmp;
3926
3927         switch (c->width) {
3928         case NL80211_CHAN_WIDTH_20:
3929                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3930                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3931                 break;
3932         case NL80211_CHAN_WIDTH_40:
3933                 c->width = NL80211_CHAN_WIDTH_20;
3934                 c->center_freq1 = c->chan->center_freq;
3935                 ret = IEEE80211_STA_DISABLE_40MHZ |
3936                       IEEE80211_STA_DISABLE_VHT;
3937                 break;
3938         case NL80211_CHAN_WIDTH_80:
3939                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3940                 /* n_P40 */
3941                 tmp /= 2;
3942                 /* freq_P40 */
3943                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3944                 c->width = NL80211_CHAN_WIDTH_40;
3945                 ret = IEEE80211_STA_DISABLE_VHT;
3946                 break;
3947         case NL80211_CHAN_WIDTH_80P80:
3948                 c->center_freq2 = 0;
3949                 c->width = NL80211_CHAN_WIDTH_80;
3950                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3951                       IEEE80211_STA_DISABLE_160MHZ;
3952                 break;
3953         case NL80211_CHAN_WIDTH_160:
3954                 /* n_P20 */
3955                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3956                 /* n_P80 */
3957                 tmp /= 4;
3958                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3959                 c->width = NL80211_CHAN_WIDTH_80;
3960                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3961                       IEEE80211_STA_DISABLE_160MHZ;
3962                 break;
3963         default:
3964         case NL80211_CHAN_WIDTH_20_NOHT:
3965                 WARN_ON_ONCE(1);
3966                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3967                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3968                 break;
3969         case NL80211_CHAN_WIDTH_1:
3970         case NL80211_CHAN_WIDTH_2:
3971         case NL80211_CHAN_WIDTH_4:
3972         case NL80211_CHAN_WIDTH_8:
3973         case NL80211_CHAN_WIDTH_16:
3974         case NL80211_CHAN_WIDTH_5:
3975         case NL80211_CHAN_WIDTH_10:
3976                 WARN_ON_ONCE(1);
3977                 /* keep c->width */
3978                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3979                 break;
3980         }
3981
3982         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3983
3984         return ret;
3985 }
3986
3987 /*
3988  * Returns true if smps_mode_new is strictly more restrictive than
3989  * smps_mode_old.
3990  */
3991 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3992                                    enum ieee80211_smps_mode smps_mode_new)
3993 {
3994         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3995                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3996                 return false;
3997
3998         switch (smps_mode_old) {
3999         case IEEE80211_SMPS_STATIC:
4000                 return false;
4001         case IEEE80211_SMPS_DYNAMIC:
4002                 return smps_mode_new == IEEE80211_SMPS_STATIC;
4003         case IEEE80211_SMPS_OFF:
4004                 return smps_mode_new != IEEE80211_SMPS_OFF;
4005         default:
4006                 WARN_ON(1);
4007         }
4008
4009         return false;
4010 }
4011
4012 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
4013                               struct cfg80211_csa_settings *csa_settings)
4014 {
4015         struct sk_buff *skb;
4016         struct ieee80211_mgmt *mgmt;
4017         struct ieee80211_local *local = sdata->local;
4018         int freq;
4019         int hdr_len = offsetofend(struct ieee80211_mgmt,
4020                                   u.action.u.chan_switch);
4021         u8 *pos;
4022
4023         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
4024             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
4025                 return -EOPNOTSUPP;
4026
4027         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
4028                             5 + /* channel switch announcement element */
4029                             3 + /* secondary channel offset element */
4030                             5 + /* wide bandwidth channel switch announcement */
4031                             8); /* mesh channel switch parameters element */
4032         if (!skb)
4033                 return -ENOMEM;
4034
4035         skb_reserve(skb, local->tx_headroom);
4036         mgmt = skb_put_zero(skb, hdr_len);
4037         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4038                                           IEEE80211_STYPE_ACTION);
4039
4040         eth_broadcast_addr(mgmt->da);
4041         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
4042         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4043                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
4044         } else {
4045                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4046                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
4047         }
4048         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
4049         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
4050         pos = skb_put(skb, 5);
4051         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
4052         *pos++ = 3;                                             /* IE length */
4053         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
4054         freq = csa_settings->chandef.chan->center_freq;
4055         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
4056         *pos++ = csa_settings->count;                           /* count */
4057
4058         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4059                 enum nl80211_channel_type ch_type;
4060
4061                 skb_put(skb, 3);
4062                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
4063                 *pos++ = 1;                                     /* IE length */
4064                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4065                 if (ch_type == NL80211_CHAN_HT40PLUS)
4066                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4067                 else
4068                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4069         }
4070
4071         if (ieee80211_vif_is_mesh(&sdata->vif)) {
4072                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4073
4074                 skb_put(skb, 8);
4075                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
4076                 *pos++ = 6;                                     /* IE length */
4077                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
4078                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
4079                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4080                 *pos++ |= csa_settings->block_tx ?
4081                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4082                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4083                 pos += 2;
4084                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4085                 pos += 2;
4086         }
4087
4088         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4089             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4090             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4091                 skb_put(skb, 5);
4092                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4093         }
4094
4095         ieee80211_tx_skb(sdata, skb);
4096         return 0;
4097 }
4098
4099 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4100 {
4101         return !(cs == NULL || cs->cipher == 0 ||
4102                  cs->hdr_len < cs->pn_len + cs->pn_off ||
4103                  cs->hdr_len <= cs->key_idx_off ||
4104                  cs->key_idx_shift > 7 ||
4105                  cs->key_idx_mask == 0);
4106 }
4107
4108 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4109 {
4110         int i;
4111
4112         /* Ensure we have enough iftype bitmap space for all iftype values */
4113         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4114
4115         for (i = 0; i < n; i++)
4116                 if (!ieee80211_cs_valid(&cs[i]))
4117                         return false;
4118
4119         return true;
4120 }
4121
4122 const struct ieee80211_cipher_scheme *
4123 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4124                  enum nl80211_iftype iftype)
4125 {
4126         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4127         int n = local->hw.n_cipher_schemes;
4128         int i;
4129         const struct ieee80211_cipher_scheme *cs = NULL;
4130
4131         for (i = 0; i < n; i++) {
4132                 if (l[i].cipher == cipher) {
4133                         cs = &l[i];
4134                         break;
4135                 }
4136         }
4137
4138         if (!cs || !(cs->iftype & BIT(iftype)))
4139                 return NULL;
4140
4141         return cs;
4142 }
4143
4144 int ieee80211_cs_headroom(struct ieee80211_local *local,
4145                           struct cfg80211_crypto_settings *crypto,
4146                           enum nl80211_iftype iftype)
4147 {
4148         const struct ieee80211_cipher_scheme *cs;
4149         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4150         int i;
4151
4152         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4153                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4154                                       iftype);
4155
4156                 if (cs && headroom < cs->hdr_len)
4157                         headroom = cs->hdr_len;
4158         }
4159
4160         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4161         if (cs && headroom < cs->hdr_len)
4162                 headroom = cs->hdr_len;
4163
4164         return headroom;
4165 }
4166
4167 static bool
4168 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4169 {
4170         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4171         int skip;
4172
4173         if (end > 0)
4174                 return false;
4175
4176         /* One shot NOA  */
4177         if (data->count[i] == 1)
4178                 return false;
4179
4180         if (data->desc[i].interval == 0)
4181                 return false;
4182
4183         /* End time is in the past, check for repetitions */
4184         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4185         if (data->count[i] < 255) {
4186                 if (data->count[i] <= skip) {
4187                         data->count[i] = 0;
4188                         return false;
4189                 }
4190
4191                 data->count[i] -= skip;
4192         }
4193
4194         data->desc[i].start += skip * data->desc[i].interval;
4195
4196         return true;
4197 }
4198
4199 static bool
4200 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4201                              s32 *offset)
4202 {
4203         bool ret = false;
4204         int i;
4205
4206         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4207                 s32 cur;
4208
4209                 if (!data->count[i])
4210                         continue;
4211
4212                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4213                         ret = true;
4214
4215                 cur = data->desc[i].start - tsf;
4216                 if (cur > *offset)
4217                         continue;
4218
4219                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4220                 if (cur > *offset)
4221                         *offset = cur;
4222         }
4223
4224         return ret;
4225 }
4226
4227 static u32
4228 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4229 {
4230         s32 offset = 0;
4231         int tries = 0;
4232         /*
4233          * arbitrary limit, used to avoid infinite loops when combined NoA
4234          * descriptors cover the full time period.
4235          */
4236         int max_tries = 5;
4237
4238         ieee80211_extend_absent_time(data, tsf, &offset);
4239         do {
4240                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4241                         break;
4242
4243                 tries++;
4244         } while (tries < max_tries);
4245
4246         return offset;
4247 }
4248
4249 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4250 {
4251         u32 next_offset = BIT(31) - 1;
4252         int i;
4253
4254         data->absent = 0;
4255         data->has_next_tsf = false;
4256         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4257                 s32 start;
4258
4259                 if (!data->count[i])
4260                         continue;
4261
4262                 ieee80211_extend_noa_desc(data, tsf, i);
4263                 start = data->desc[i].start - tsf;
4264                 if (start <= 0)
4265                         data->absent |= BIT(i);
4266
4267                 if (next_offset > start)
4268                         next_offset = start;
4269
4270                 data->has_next_tsf = true;
4271         }
4272
4273         if (data->absent)
4274                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4275
4276         data->next_tsf = tsf + next_offset;
4277 }
4278 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4279
4280 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4281                             struct ieee80211_noa_data *data, u32 tsf)
4282 {
4283         int ret = 0;
4284         int i;
4285
4286         memset(data, 0, sizeof(*data));
4287
4288         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4289                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4290
4291                 if (!desc->count || !desc->duration)
4292                         continue;
4293
4294                 data->count[i] = desc->count;
4295                 data->desc[i].start = le32_to_cpu(desc->start_time);
4296                 data->desc[i].duration = le32_to_cpu(desc->duration);
4297                 data->desc[i].interval = le32_to_cpu(desc->interval);
4298
4299                 if (data->count[i] > 1 &&
4300                     data->desc[i].interval < data->desc[i].duration)
4301                         continue;
4302
4303                 ieee80211_extend_noa_desc(data, tsf, i);
4304                 ret++;
4305         }
4306
4307         if (ret)
4308                 ieee80211_update_p2p_noa(data, tsf);
4309
4310         return ret;
4311 }
4312 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4313
4314 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4315                            struct ieee80211_sub_if_data *sdata)
4316 {
4317         u64 tsf = drv_get_tsf(local, sdata);
4318         u64 dtim_count = 0;
4319         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4320         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4321         struct ps_data *ps;
4322         u8 bcns_from_dtim;
4323
4324         if (tsf == -1ULL || !beacon_int || !dtim_period)
4325                 return;
4326
4327         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4328             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4329                 if (!sdata->bss)
4330                         return;
4331
4332                 ps = &sdata->bss->ps;
4333         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4334                 ps = &sdata->u.mesh.ps;
4335         } else {
4336                 return;
4337         }
4338
4339         /*
4340          * actually finds last dtim_count, mac80211 will update in
4341          * __beacon_add_tim().
4342          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4343          */
4344         do_div(tsf, beacon_int);
4345         bcns_from_dtim = do_div(tsf, dtim_period);
4346         /* just had a DTIM */
4347         if (!bcns_from_dtim)
4348                 dtim_count = 0;
4349         else
4350                 dtim_count = dtim_period - bcns_from_dtim;
4351
4352         ps->dtim_count = dtim_count;
4353 }
4354
4355 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4356                                          struct ieee80211_chanctx *ctx)
4357 {
4358         struct ieee80211_sub_if_data *sdata;
4359         u8 radar_detect = 0;
4360
4361         lockdep_assert_held(&local->chanctx_mtx);
4362
4363         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4364                 return 0;
4365
4366         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4367                 if (sdata->reserved_radar_required)
4368                         radar_detect |= BIT(sdata->reserved_chandef.width);
4369
4370         /*
4371          * An in-place reservation context should not have any assigned vifs
4372          * until it replaces the other context.
4373          */
4374         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4375                 !list_empty(&ctx->assigned_vifs));
4376
4377         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4378                 if (sdata->radar_required)
4379                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4380
4381         return radar_detect;
4382 }
4383
4384 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4385                                  const struct cfg80211_chan_def *chandef,
4386                                  enum ieee80211_chanctx_mode chanmode,
4387                                  u8 radar_detect)
4388 {
4389         struct ieee80211_local *local = sdata->local;
4390         struct ieee80211_sub_if_data *sdata_iter;
4391         enum nl80211_iftype iftype = sdata->wdev.iftype;
4392         struct ieee80211_chanctx *ctx;
4393         int total = 1;
4394         struct iface_combination_params params = {
4395                 .radar_detect = radar_detect,
4396         };
4397
4398         lockdep_assert_held(&local->chanctx_mtx);
4399
4400         if (WARN_ON(hweight32(radar_detect) > 1))
4401                 return -EINVAL;
4402
4403         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4404                     !chandef->chan))
4405                 return -EINVAL;
4406
4407         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4408                 return -EINVAL;
4409
4410         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4411             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4412                 /*
4413                  * always passing this is harmless, since it'll be the
4414                  * same value that cfg80211 finds if it finds the same
4415                  * interface ... and that's always allowed
4416                  */
4417                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4418         }
4419
4420         /* Always allow software iftypes */
4421         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4422                 if (radar_detect)
4423                         return -EINVAL;
4424                 return 0;
4425         }
4426
4427         if (chandef)
4428                 params.num_different_channels = 1;
4429
4430         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4431                 params.iftype_num[iftype] = 1;
4432
4433         list_for_each_entry(ctx, &local->chanctx_list, list) {
4434                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4435                         continue;
4436                 params.radar_detect |=
4437                         ieee80211_chanctx_radar_detect(local, ctx);
4438                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4439                         params.num_different_channels++;
4440                         continue;
4441                 }
4442                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4443                     cfg80211_chandef_compatible(chandef,
4444                                                 &ctx->conf.def))
4445                         continue;
4446                 params.num_different_channels++;
4447         }
4448
4449         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4450                 struct wireless_dev *wdev_iter;
4451
4452                 wdev_iter = &sdata_iter->wdev;
4453
4454                 if (sdata_iter == sdata ||
4455                     !ieee80211_sdata_running(sdata_iter) ||
4456                     cfg80211_iftype_allowed(local->hw.wiphy,
4457                                             wdev_iter->iftype, 0, 1))
4458                         continue;
4459
4460                 params.iftype_num[wdev_iter->iftype]++;
4461                 total++;
4462         }
4463
4464         if (total == 1 && !params.radar_detect)
4465                 return 0;
4466
4467         return cfg80211_check_combinations(local->hw.wiphy, &params);
4468 }
4469
4470 static void
4471 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4472                          void *data)
4473 {
4474         u32 *max_num_different_channels = data;
4475
4476         *max_num_different_channels = max(*max_num_different_channels,
4477                                           c->num_different_channels);
4478 }
4479
4480 int ieee80211_max_num_channels(struct ieee80211_local *local)
4481 {
4482         struct ieee80211_sub_if_data *sdata;
4483         struct ieee80211_chanctx *ctx;
4484         u32 max_num_different_channels = 1;
4485         int err;
4486         struct iface_combination_params params = {0};
4487
4488         lockdep_assert_held(&local->chanctx_mtx);
4489
4490         list_for_each_entry(ctx, &local->chanctx_list, list) {
4491                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4492                         continue;
4493
4494                 params.num_different_channels++;
4495
4496                 params.radar_detect |=
4497                         ieee80211_chanctx_radar_detect(local, ctx);
4498         }
4499
4500         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4501                 params.iftype_num[sdata->wdev.iftype]++;
4502
4503         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4504                                          ieee80211_iter_max_chans,
4505                                          &max_num_different_channels);
4506         if (err < 0)
4507                 return err;
4508
4509         return max_num_different_channels;
4510 }
4511
4512 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4513                                 struct ieee80211_sta_s1g_cap *caps,
4514                                 struct sk_buff *skb)
4515 {
4516         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4517         struct ieee80211_s1g_cap s1g_capab;
4518         u8 *pos;
4519         int i;
4520
4521         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4522                 return;
4523
4524         if (!caps->s1g)
4525                 return;
4526
4527         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4528         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4529
4530         /* override the capability info */
4531         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4532                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4533
4534                 s1g_capab.capab_info[i] &= ~mask;
4535                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4536         }
4537
4538         /* then MCS and NSS set */
4539         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4540                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4541
4542                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4543                 s1g_capab.supp_mcs_nss[i] |=
4544                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4545         }
4546
4547         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4548         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4549         *pos++ = sizeof(s1g_capab);
4550
4551         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4552 }
4553
4554 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4555                                   struct sk_buff *skb)
4556 {
4557         u8 *pos = skb_put(skb, 3);
4558
4559         *pos++ = WLAN_EID_AID_REQUEST;
4560         *pos++ = 1;
4561         *pos++ = 0;
4562 }
4563
4564 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4565 {
4566         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4567         *buf++ = 7; /* len */
4568         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4569         *buf++ = 0x50;
4570         *buf++ = 0xf2;
4571         *buf++ = 2; /* WME */
4572         *buf++ = 0; /* WME info */
4573         *buf++ = 1; /* WME ver */
4574         *buf++ = qosinfo; /* U-APSD no in use */
4575
4576         return buf;
4577 }
4578
4579 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4580                              unsigned long *frame_cnt,
4581                              unsigned long *byte_cnt)
4582 {
4583         struct txq_info *txqi = to_txq_info(txq);
4584         u32 frag_cnt = 0, frag_bytes = 0;
4585         struct sk_buff *skb;
4586
4587         skb_queue_walk(&txqi->frags, skb) {
4588                 frag_cnt++;
4589                 frag_bytes += skb->len;
4590         }
4591
4592         if (frame_cnt)
4593                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4594
4595         if (byte_cnt)
4596                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4597 }
4598 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4599
4600 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4601         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4602         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4603         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4604         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4605 };
4606
4607 u16 ieee80211_encode_usf(int listen_interval)
4608 {
4609         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4610         u16 ui, usf = 0;
4611
4612         /* find greatest USF */
4613         while (usf < IEEE80211_MAX_USF) {
4614                 if (listen_interval % listen_int_usf[usf + 1])
4615                         break;
4616                 usf += 1;
4617         }
4618         ui = listen_interval / listen_int_usf[usf];
4619
4620         /* error if there is a remainder. Should've been checked by user */
4621         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4622         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4623                           FIELD_PREP(LISTEN_INT_UI, ui);
4624
4625         return (u16) listen_interval;
4626 }