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) 2018-2020 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(unsigned long data)
 390 {
 391         struct ieee80211_local *local = (struct ieee80211_local *)data;
 392         unsigned long flags;
 393
 394         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 395         _ieee80211_wake_txqs(local, &flags);
 396         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 397 }
 398
 399 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 400 {
 401         struct ieee80211_sub_if_data *sdata;
 402         int n_acs = IEEE80211_NUM_ACS;
 403
 404         if (local->ops->wake_tx_queue)
 405                 return;
 406
 407         if (local->hw.queues < IEEE80211_NUM_ACS)
 408                 n_acs = 1;
 409
 410         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 411                 int ac;
 412
 413                 if (!sdata->dev)
 414                         continue;
 415
 416                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 417                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 418                         continue;
 419
 420                 for (ac = 0; ac < n_acs; ac++) {
 421                         int ac_queue = sdata->vif.hw_queue[ac];
 422
 423                         if (ac_queue == queue ||
 424                             (sdata->vif.cab_queue == queue &&
 425                              local->queue_stop_reasons[ac_queue] == 0 &&
 426                              skb_queue_empty(&local->pending[ac_queue])))
 427                                 netif_wake_subqueue(sdata->dev, ac);
 428                 }
 429         }
 430 }
 431
 432 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 433                                    enum queue_stop_reason reason,
 434                                    bool refcounted,
 435                                    unsigned long *flags)
 436 {
 437         struct ieee80211_local *local = hw_to_local(hw);
 438
 439         trace_wake_queue(local, queue, reason);
 440
 441         if (WARN_ON(queue >= hw->queues))
 442                 return;
 443
 444         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 445                 return;
 446
 447         if (!refcounted) {
 448                 local->q_stop_reasons[queue][reason] = 0;
 449         } else {
 450                 local->q_stop_reasons[queue][reason]--;
 451                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 452                         local->q_stop_reasons[queue][reason] = 0;
 453         }
 454
 455         if (local->q_stop_reasons[queue][reason] == 0)
 456                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 457
 458         if (local->queue_stop_reasons[queue] != 0)
 459                 /* someone still has this queue stopped */
 460                 return;
 461
 462         if (skb_queue_empty(&local->pending[queue])) {
 463                 rcu_read_lock();
 464                 ieee80211_propagate_queue_wake(local, queue);
 465                 rcu_read_unlock();
 466         } else
 467                 tasklet_schedule(&local->tx_pending_tasklet);
 468
 469         /*
 470          * Calling _ieee80211_wake_txqs here can be a problem because it may
 471          * release queue_stop_reason_lock which has been taken by
 472          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 473          * release someone's lock, but it is fine because all the callers of
 474          * __ieee80211_wake_queue call it right before releasing the lock.
 475          */
 476         if (local->ops->wake_tx_queue) {
 477                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 478                         tasklet_schedule(&local->wake_txqs_tasklet);
 479                 else
 480                         _ieee80211_wake_txqs(local, flags);
 481         }
 482 }
 483
 484 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 485                                     enum queue_stop_reason reason,
 486                                     bool refcounted)
 487 {
 488         struct ieee80211_local *local = hw_to_local(hw);
 489         unsigned long flags;
 490
 491         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 492         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 493         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 494 }
 495
 496 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 497 {
 498         ieee80211_wake_queue_by_reason(hw, queue,
 499                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 500                                        false);
 501 }
 502 EXPORT_SYMBOL(ieee80211_wake_queue);
 503
 504 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 505                                    enum queue_stop_reason reason,
 506                                    bool refcounted)
 507 {
 508         struct ieee80211_local *local = hw_to_local(hw);
 509         struct ieee80211_sub_if_data *sdata;
 510         int n_acs = IEEE80211_NUM_ACS;
 511
 512         trace_stop_queue(local, queue, reason);
 513
 514         if (WARN_ON(queue >= hw->queues))
 515                 return;
 516
 517         if (!refcounted)
 518                 local->q_stop_reasons[queue][reason] = 1;
 519         else
 520                 local->q_stop_reasons[queue][reason]++;
 521
 522         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 523                 return;
 524
 525         if (local->hw.queues < IEEE80211_NUM_ACS)
 526                 n_acs = 1;
 527
 528         rcu_read_lock();
 529         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 530                 int ac;
 531
 532                 if (!sdata->dev)
 533                         continue;
 534
 535                 for (ac = 0; ac < n_acs; ac++) {
 536                         if (sdata->vif.hw_queue[ac] == queue ||
 537                             sdata->vif.cab_queue == queue) {
 538                                 if (!local->ops->wake_tx_queue) {
 539                                         netif_stop_subqueue(sdata->dev, ac);
 540                                         continue;
 541                                 }
 542                                 spin_lock(&local->fq.lock);
 543                                 sdata->vif.txqs_stopped[ac] = true;
 544                                 spin_unlock(&local->fq.lock);
 545                         }
 546                 }
 547         }
 548         rcu_read_unlock();
 549 }
 550
 551 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 552                                     enum queue_stop_reason reason,
 553                                     bool refcounted)
 554 {
 555         struct ieee80211_local *local = hw_to_local(hw);
 556         unsigned long flags;
 557
 558         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 559         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 560         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 561 }
 562
 563 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 564 {
 565         ieee80211_stop_queue_by_reason(hw, queue,
 566                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 567                                        false);
 568 }
 569 EXPORT_SYMBOL(ieee80211_stop_queue);
 570
 571 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 572                                struct sk_buff *skb)
 573 {
 574         struct ieee80211_hw *hw = &local->hw;
 575         unsigned long flags;
 576         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 577         int queue = info->hw_queue;
 578
 579         if (WARN_ON(!info->control.vif)) {
 580                 ieee80211_free_txskb(&local->hw, skb);
 581                 return;
 582         }
 583
 584         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 585         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 586                                false);
 587         __skb_queue_tail(&local->pending[queue], skb);
 588         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 589                                false, &flags);
 590         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 591 }
 592
 593 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 594                                 struct sk_buff_head *skbs)
 595 {
 596         struct ieee80211_hw *hw = &local->hw;
 597         struct sk_buff *skb;
 598         unsigned long flags;
 599         int queue, i;
 600
 601         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 602         while ((skb = skb_dequeue(skbs))) {
 603                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 604
 605                 if (WARN_ON(!info->control.vif)) {
 606                         ieee80211_free_txskb(&local->hw, skb);
 607                         continue;
 608                 }
 609
 610                 queue = info->hw_queue;
 611
 612                 __ieee80211_stop_queue(hw, queue,
 613                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 614                                 false);
 615
 616                 __skb_queue_tail(&local->pending[queue], skb);
 617         }
 618
 619         for (i = 0; i < hw->queues; i++)
 620                 __ieee80211_wake_queue(hw, i,
 621                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 622                         false, &flags);
 623         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 624 }
 625
 626 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 627                                      unsigned long queues,
 628                                      enum queue_stop_reason reason,
 629                                      bool refcounted)
 630 {
 631         struct ieee80211_local *local = hw_to_local(hw);
 632         unsigned long flags;
 633         int i;
 634
 635         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 636
 637         for_each_set_bit(i, &queues, hw->queues)
 638                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 639
 640         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 641 }
 642
 643 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 644 {
 645         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 646                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 647                                         false);
 648 }
 649 EXPORT_SYMBOL(ieee80211_stop_queues);
 650
 651 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 652 {
 653         struct ieee80211_local *local = hw_to_local(hw);
 654         unsigned long flags;
 655         int ret;
 656
 657         if (WARN_ON(queue >= hw->queues))
 658                 return true;
 659
 660         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 661         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 662                        &local->queue_stop_reasons[queue]);
 663         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 664         return ret;
 665 }
 666 EXPORT_SYMBOL(ieee80211_queue_stopped);
 667
 668 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 669                                      unsigned long queues,
 670                                      enum queue_stop_reason reason,
 671                                      bool refcounted)
 672 {
 673         struct ieee80211_local *local = hw_to_local(hw);
 674         unsigned long flags;
 675         int i;
 676
 677         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 678
 679         for_each_set_bit(i, &queues, hw->queues)
 680                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 681
 682         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 683 }
 684
 685 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 686 {
 687         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 688                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 689                                         false);
 690 }
 691 EXPORT_SYMBOL(ieee80211_wake_queues);
 692
 693 static unsigned int
 694 ieee80211_get_vif_queues(struct ieee80211_local *local,
 695                          struct ieee80211_sub_if_data *sdata)
 696 {
 697         unsigned int queues;
 698
 699         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 700                 int ac;
 701
 702                 queues = 0;
 703
 704                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 705                         queues |= BIT(sdata->vif.hw_queue[ac]);
 706                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 707                         queues |= BIT(sdata->vif.cab_queue);
 708         } else {
 709                 /* all queues */
 710                 queues = BIT(local->hw.queues) - 1;
 711         }
 712
 713         return queues;
 714 }
 715
 716 void __ieee80211_flush_queues(struct ieee80211_local *local,
 717                               struct ieee80211_sub_if_data *sdata,
 718                               unsigned int queues, bool drop)
 719 {
 720         if (!local->ops->flush)
 721                 return;
 722
 723         /*
 724          * If no queue was set, or if the HW doesn't support
 725          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 726          */
 727         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 728                 queues = ieee80211_get_vif_queues(local, sdata);
 729
 730         ieee80211_stop_queues_by_reason(&local->hw, queues,
 731                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 732                                         false);
 733
 734         drv_flush(local, sdata, queues, drop);
 735
 736         ieee80211_wake_queues_by_reason(&local->hw, queues,
 737                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 738                                         false);
 739 }
 740
 741 void ieee80211_flush_queues(struct ieee80211_local *local,
 742                             struct ieee80211_sub_if_data *sdata, bool drop)
 743 {
 744         __ieee80211_flush_queues(local, sdata, 0, drop);
 745 }
 746
 747 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 748                                struct ieee80211_sub_if_data *sdata,
 749                                enum queue_stop_reason reason)
 750 {
 751         ieee80211_stop_queues_by_reason(&local->hw,
 752                                         ieee80211_get_vif_queues(local, sdata),
 753                                         reason, true);
 754 }
 755
 756 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 757                                struct ieee80211_sub_if_data *sdata,
 758                                enum queue_stop_reason reason)
 759 {
 760         ieee80211_wake_queues_by_reason(&local->hw,
 761                                         ieee80211_get_vif_queues(local, sdata),
 762                                         reason, true);
 763 }
 764
 765 static void __iterate_interfaces(struct ieee80211_local *local,
 766                                  u32 iter_flags,
 767                                  void (*iterator)(void *data, u8 *mac,
 768                                                   struct ieee80211_vif *vif),
 769                                  void *data)
 770 {
 771         struct ieee80211_sub_if_data *sdata;
 772         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 773
 774         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 775                 switch (sdata->vif.type) {
 776                 case NL80211_IFTYPE_MONITOR:
 777                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 778                                 continue;
 779                         break;
 780                 case NL80211_IFTYPE_AP_VLAN:
 781                         continue;
 782                 default:
 783                         break;
 784                 }
 785                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 786                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 787                         continue;
 788                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 789                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 790                         continue;
 791                 if (ieee80211_sdata_running(sdata) || !active_only)
 792                         iterator(data, sdata->vif.addr,
 793                                  &sdata->vif);
 794         }
 795
 796         sdata = rcu_dereference_check(local->monitor_sdata,
 797                                       lockdep_is_held(&local->iflist_mtx) ||
 798                                       lockdep_rtnl_is_held());
 799         if (sdata &&
 800             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 801              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 802                 iterator(data, sdata->vif.addr, &sdata->vif);
 803 }
 804
 805 void ieee80211_iterate_interfaces(
 806         struct ieee80211_hw *hw, u32 iter_flags,
 807         void (*iterator)(void *data, u8 *mac,
 808                          struct ieee80211_vif *vif),
 809         void *data)
 810 {
 811         struct ieee80211_local *local = hw_to_local(hw);
 812
 813         mutex_lock(&local->iflist_mtx);
 814         __iterate_interfaces(local, iter_flags, iterator, data);
 815         mutex_unlock(&local->iflist_mtx);
 816 }
 817 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 818
 819 void ieee80211_iterate_active_interfaces_atomic(
 820         struct ieee80211_hw *hw, u32 iter_flags,
 821         void (*iterator)(void *data, u8 *mac,
 822                          struct ieee80211_vif *vif),
 823         void *data)
 824 {
 825         struct ieee80211_local *local = hw_to_local(hw);
 826
 827         rcu_read_lock();
 828         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 829                              iterator, data);
 830         rcu_read_unlock();
 831 }
 832 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 833
 834 void ieee80211_iterate_active_interfaces_rtnl(
 835         struct ieee80211_hw *hw, u32 iter_flags,
 836         void (*iterator)(void *data, u8 *mac,
 837                          struct ieee80211_vif *vif),
 838         void *data)
 839 {
 840         struct ieee80211_local *local = hw_to_local(hw);
 841
 842         ASSERT_RTNL();
 843
 844         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 845                              iterator, data);
 846 }
 847 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 848
 849 static void __iterate_stations(struct ieee80211_local *local,
 850                                void (*iterator)(void *data,
 851                                                 struct ieee80211_sta *sta),
 852                                void *data)
 853 {
 854         struct sta_info *sta;
 855
 856         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 857                 if (!sta->uploaded)
 858                         continue;
 859
 860                 iterator(data, &sta->sta);
 861         }
 862 }
 863
 864 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 865                         void (*iterator)(void *data,
 866                                          struct ieee80211_sta *sta),
 867                         void *data)
 868 {
 869         struct ieee80211_local *local = hw_to_local(hw);
 870
 871         rcu_read_lock();
 872         __iterate_stations(local, iterator, data);
 873         rcu_read_unlock();
 874 }
 875 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 876
 877 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 878 {
 879         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 880
 881         if (!ieee80211_sdata_running(sdata) ||
 882             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 883                 return NULL;
 884         return &sdata->vif;
 885 }
 886 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 887
 888 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 889 {
 890         struct ieee80211_sub_if_data *sdata;
 891
 892         if (!vif)
 893                 return NULL;
 894
 895         sdata = vif_to_sdata(vif);
 896
 897         if (!ieee80211_sdata_running(sdata) ||
 898             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 899                 return NULL;
 900
 901         return &sdata->wdev;
 902 }
 903 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 904
 905 /*
 906  * Nothing should have been stuffed into the workqueue during
 907  * the suspend->resume cycle. Since we can't check each caller
 908  * of this function if we are already quiescing / suspended,
 909  * check here and don't WARN since this can actually happen when
 910  * the rx path (for example) is racing against __ieee80211_suspend
 911  * and suspending / quiescing was set after the rx path checked
 912  * them.
 913  */
 914 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 915 {
 916         if (local->quiescing || (local->suspended && !local->resuming)) {
 917                 pr_warn("queueing ieee80211 work while going to suspend\n");
 918                 return false;
 919         }
 920
 921         return true;
 922 }
 923
 924 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 925 {
 926         struct ieee80211_local *local = hw_to_local(hw);
 927
 928         if (!ieee80211_can_queue_work(local))
 929                 return;
 930
 931         queue_work(local->workqueue, work);
 932 }
 933 EXPORT_SYMBOL(ieee80211_queue_work);
 934
 935 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 936                                   struct delayed_work *dwork,
 937                                   unsigned long delay)
 938 {
 939         struct ieee80211_local *local = hw_to_local(hw);
 940
 941         if (!ieee80211_can_queue_work(local))
 942                 return;
 943
 944         queue_delayed_work(local->workqueue, dwork, delay);
 945 }
 946 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 947
 948 static void ieee80211_parse_extension_element(u32 *crc,
 949                                               const struct element *elem,
 950                                               struct ieee802_11_elems *elems)
 951 {
 952         const void *data = elem->data + 1;
 953         u8 len = elem->datalen - 1;
 954
 955         switch (elem->data[0]) {
 956         case WLAN_EID_EXT_HE_MU_EDCA:
 957                 if (len == sizeof(*elems->mu_edca_param_set)) {
 958                         elems->mu_edca_param_set = data;
 959                         if (crc)
 960                                 *crc = crc32_be(*crc, (void *)elem,
 961                                                 elem->datalen + 2);
 962                 }
 963                 break;
 964         case WLAN_EID_EXT_HE_CAPABILITY:
 965                 elems->he_cap = data;
 966                 elems->he_cap_len = len;
 967                 break;
 968         case WLAN_EID_EXT_HE_OPERATION:
 969                 if (len >= sizeof(*elems->he_operation) &&
 970                     len == ieee80211_he_oper_size(data) - 1) {
 971                         if (crc)
 972                                 *crc = crc32_be(*crc, (void *)elem,
 973                                                 elem->datalen + 2);
 974                         elems->he_operation = data;
 975                 }
 976                 break;
 977         case WLAN_EID_EXT_UORA:
 978                 if (len == 1)
 979                         elems->uora_element = data;
 980                 break;
 981         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 982                 if (len == 3)
 983                         elems->max_channel_switch_time = data;
 984                 break;
 985         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 986                 if (len == sizeof(*elems->mbssid_config_ie))
 987                         elems->mbssid_config_ie = data;
 988                 break;
 989         case WLAN_EID_EXT_HE_SPR:
 990                 if (len >= sizeof(*elems->he_spr) &&
 991                     len >= ieee80211_he_spr_size(data))
 992                         elems->he_spr = data;
 993                 break;
 994         case WLAN_EID_EXT_HE_6GHZ_CAPA:
 995                 if (len == sizeof(*elems->he_6ghz_capa))
 996                         elems->he_6ghz_capa = data;
 997                 break;
 998         }
 999 }
1000
1001 static u32
1002 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1003                             struct ieee802_11_elems *elems,
1004                             u64 filter, u32 crc,
1005                             const struct element *check_inherit)
1006 {
1007         const struct element *elem;
1008         bool calc_crc = filter != 0;
1009         DECLARE_BITMAP(seen_elems, 256);
1010         const u8 *ie;
1011
1012         bitmap_zero(seen_elems, 256);
1013
1014         for_each_element(elem, start, len) {
1015                 bool elem_parse_failed;
1016                 u8 id = elem->id;
1017                 u8 elen = elem->datalen;
1018                 const u8 *pos = elem->data;
1019
1020                 if (check_inherit &&
1021                     !cfg80211_is_element_inherited(elem,
1022                                                    check_inherit))
1023                         continue;
1024
1025                 switch (id) {
1026                 case WLAN_EID_SSID:
1027                 case WLAN_EID_SUPP_RATES:
1028                 case WLAN_EID_FH_PARAMS:
1029                 case WLAN_EID_DS_PARAMS:
1030                 case WLAN_EID_CF_PARAMS:
1031                 case WLAN_EID_TIM:
1032                 case WLAN_EID_IBSS_PARAMS:
1033                 case WLAN_EID_CHALLENGE:
1034                 case WLAN_EID_RSN:
1035                 case WLAN_EID_ERP_INFO:
1036                 case WLAN_EID_EXT_SUPP_RATES:
1037                 case WLAN_EID_HT_CAPABILITY:
1038                 case WLAN_EID_HT_OPERATION:
1039                 case WLAN_EID_VHT_CAPABILITY:
1040                 case WLAN_EID_VHT_OPERATION:
1041                 case WLAN_EID_MESH_ID:
1042                 case WLAN_EID_MESH_CONFIG:
1043                 case WLAN_EID_PEER_MGMT:
1044                 case WLAN_EID_PREQ:
1045                 case WLAN_EID_PREP:
1046                 case WLAN_EID_PERR:
1047                 case WLAN_EID_RANN:
1048                 case WLAN_EID_CHANNEL_SWITCH:
1049                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1050                 case WLAN_EID_COUNTRY:
1051                 case WLAN_EID_PWR_CONSTRAINT:
1052                 case WLAN_EID_TIMEOUT_INTERVAL:
1053                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1054                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1055                 case WLAN_EID_CHAN_SWITCH_PARAM:
1056                 case WLAN_EID_EXT_CAPABILITY:
1057                 case WLAN_EID_CHAN_SWITCH_TIMING:
1058                 case WLAN_EID_LINK_ID:
1059                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1060                 case WLAN_EID_RSNX:
1061                 case WLAN_EID_S1G_BCN_COMPAT:
1062                 case WLAN_EID_S1G_CAPABILITIES:
1063                 case WLAN_EID_S1G_OPERATION:
1064                 case WLAN_EID_AID_RESPONSE:
1065                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1066                 /*
1067                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1068                  * that if the content gets bigger it might be needed more than once
1069                  */
1070                         if (test_bit(id, seen_elems)) {
1071                                 elems->parse_error = true;
1072                                 continue;
1073                         }
1074                         break;
1075                 }
1076
1077                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1078                         crc = crc32_be(crc, pos - 2, elen + 2);
1079
1080                 elem_parse_failed = false;
1081
1082                 switch (id) {
1083                 case WLAN_EID_LINK_ID:
1084                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1085                                 elem_parse_failed = true;
1086                                 break;
1087                         }
1088                         elems->lnk_id = (void *)(pos - 2);
1089                         break;
1090                 case WLAN_EID_CHAN_SWITCH_TIMING:
1091                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1092                                 elem_parse_failed = true;
1093                                 break;
1094                         }
1095                         elems->ch_sw_timing = (void *)pos;
1096                         break;
1097                 case WLAN_EID_EXT_CAPABILITY:
1098                         elems->ext_capab = pos;
1099                         elems->ext_capab_len = elen;
1100                         break;
1101                 case WLAN_EID_SSID:
1102                         elems->ssid = pos;
1103                         elems->ssid_len = elen;
1104                         break;
1105                 case WLAN_EID_SUPP_RATES:
1106                         elems->supp_rates = pos;
1107                         elems->supp_rates_len = elen;
1108                         break;
1109                 case WLAN_EID_DS_PARAMS:
1110                         if (elen >= 1)
1111                                 elems->ds_params = pos;
1112                         else
1113                                 elem_parse_failed = true;
1114                         break;
1115                 case WLAN_EID_TIM:
1116                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1117                                 elems->tim = (void *)pos;
1118                                 elems->tim_len = elen;
1119                         } else
1120                                 elem_parse_failed = true;
1121                         break;
1122                 case WLAN_EID_CHALLENGE:
1123                         elems->challenge = pos;
1124                         elems->challenge_len = elen;
1125                         break;
1126                 case WLAN_EID_VENDOR_SPECIFIC:
1127                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1128                             pos[2] == 0xf2) {
1129                                 /* Microsoft OUI (00:50:F2) */
1130
1131                                 if (calc_crc)
1132                                         crc = crc32_be(crc, pos - 2, elen + 2);
1133
1134                                 if (elen >= 5 && pos[3] == 2) {
1135                                         /* OUI Type 2 - WMM IE */
1136                                         if (pos[4] == 0) {
1137                                                 elems->wmm_info = pos;
1138                                                 elems->wmm_info_len = elen;
1139                                         } else if (pos[4] == 1) {
1140                                                 elems->wmm_param = pos;
1141                                                 elems->wmm_param_len = elen;
1142                                         }
1143                                 }
1144                         }
1145                         break;
1146                 case WLAN_EID_RSN:
1147                         elems->rsn = pos;
1148                         elems->rsn_len = elen;
1149                         break;
1150                 case WLAN_EID_ERP_INFO:
1151                         if (elen >= 1)
1152                                 elems->erp_info = pos;
1153                         else
1154                                 elem_parse_failed = true;
1155                         break;
1156                 case WLAN_EID_EXT_SUPP_RATES:
1157                         elems->ext_supp_rates = pos;
1158                         elems->ext_supp_rates_len = elen;
1159                         break;
1160                 case WLAN_EID_HT_CAPABILITY:
1161                         if (elen >= sizeof(struct ieee80211_ht_cap))
1162                                 elems->ht_cap_elem = (void *)pos;
1163                         else
1164                                 elem_parse_failed = true;
1165                         break;
1166                 case WLAN_EID_HT_OPERATION:
1167                         if (elen >= sizeof(struct ieee80211_ht_operation))
1168                                 elems->ht_operation = (void *)pos;
1169                         else
1170                                 elem_parse_failed = true;
1171                         break;
1172                 case WLAN_EID_VHT_CAPABILITY:
1173                         if (elen >= sizeof(struct ieee80211_vht_cap))
1174                                 elems->vht_cap_elem = (void *)pos;
1175                         else
1176                                 elem_parse_failed = true;
1177                         break;
1178                 case WLAN_EID_VHT_OPERATION:
1179                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1180                                 elems->vht_operation = (void *)pos;
1181                                 if (calc_crc)
1182                                         crc = crc32_be(crc, pos - 2, elen + 2);
1183                                 break;
1184                         }
1185                         elem_parse_failed = true;
1186                         break;
1187                 case WLAN_EID_OPMODE_NOTIF:
1188                         if (elen > 0) {
1189                                 elems->opmode_notif = pos;
1190                                 if (calc_crc)
1191                                         crc = crc32_be(crc, pos - 2, elen + 2);
1192                                 break;
1193                         }
1194                         elem_parse_failed = true;
1195                         break;
1196                 case WLAN_EID_MESH_ID:
1197                         elems->mesh_id = pos;
1198                         elems->mesh_id_len = elen;
1199                         break;
1200                 case WLAN_EID_MESH_CONFIG:
1201                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1202                                 elems->mesh_config = (void *)pos;
1203                         else
1204                                 elem_parse_failed = true;
1205                         break;
1206                 case WLAN_EID_PEER_MGMT:
1207                         elems->peering = pos;
1208                         elems->peering_len = elen;
1209                         break;
1210                 case WLAN_EID_MESH_AWAKE_WINDOW:
1211                         if (elen >= 2)
1212                                 elems->awake_window = (void *)pos;
1213                         break;
1214                 case WLAN_EID_PREQ:
1215                         elems->preq = pos;
1216                         elems->preq_len = elen;
1217                         break;
1218                 case WLAN_EID_PREP:
1219                         elems->prep = pos;
1220                         elems->prep_len = elen;
1221                         break;
1222                 case WLAN_EID_PERR:
1223                         elems->perr = pos;
1224                         elems->perr_len = elen;
1225                         break;
1226                 case WLAN_EID_RANN:
1227                         if (elen >= sizeof(struct ieee80211_rann_ie))
1228                                 elems->rann = (void *)pos;
1229                         else
1230                                 elem_parse_failed = true;
1231                         break;
1232                 case WLAN_EID_CHANNEL_SWITCH:
1233                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1234                                 elem_parse_failed = true;
1235                                 break;
1236                         }
1237                         elems->ch_switch_ie = (void *)pos;
1238                         break;
1239                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1240                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1241                                 elem_parse_failed = true;
1242                                 break;
1243                         }
1244                         elems->ext_chansw_ie = (void *)pos;
1245                         break;
1246                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1247                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1248                                 elem_parse_failed = true;
1249                                 break;
1250                         }
1251                         elems->sec_chan_offs = (void *)pos;
1252                         break;
1253                 case WLAN_EID_CHAN_SWITCH_PARAM:
1254                         if (elen !=
1255                             sizeof(*elems->mesh_chansw_params_ie)) {
1256                                 elem_parse_failed = true;
1257                                 break;
1258                         }
1259                         elems->mesh_chansw_params_ie = (void *)pos;
1260                         break;
1261                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1262                         if (!action ||
1263                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1264                                 elem_parse_failed = true;
1265                                 break;
1266                         }
1267                         elems->wide_bw_chansw_ie = (void *)pos;
1268                         break;
1269                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1270                         if (action) {
1271                                 elem_parse_failed = true;
1272                                 break;
1273                         }
1274                         /*
1275                          * This is a bit tricky, but as we only care about
1276                          * the wide bandwidth channel switch element, so
1277                          * just parse it out manually.
1278                          */
1279                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1280                                               pos, elen);
1281                         if (ie) {
1282                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1283                                         elems->wide_bw_chansw_ie =
1284                                                 (void *)(ie + 2);
1285                                 else
1286                                         elem_parse_failed = true;
1287                         }
1288                         break;
1289                 case WLAN_EID_COUNTRY:
1290                         elems->country_elem = pos;
1291                         elems->country_elem_len = elen;
1292                         break;
1293                 case WLAN_EID_PWR_CONSTRAINT:
1294                         if (elen != 1) {
1295                                 elem_parse_failed = true;
1296                                 break;
1297                         }
1298                         elems->pwr_constr_elem = pos;
1299                         break;
1300                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1301                         /* Lots of different options exist, but we only care
1302                          * about the Dynamic Transmit Power Control element.
1303                          * First check for the Cisco OUI, then for the DTPC
1304                          * tag (0x00).
1305                          */
1306                         if (elen < 4) {
1307                                 elem_parse_failed = true;
1308                                 break;
1309                         }
1310
1311                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1312                             pos[2] != 0x96 || pos[3] != 0x00)
1313                                 break;
1314
1315                         if (elen != 6) {
1316                                 elem_parse_failed = true;
1317                                 break;
1318                         }
1319
1320                         if (calc_crc)
1321                                 crc = crc32_be(crc, pos - 2, elen + 2);
1322
1323                         elems->cisco_dtpc_elem = pos;
1324                         break;
1325                 case WLAN_EID_ADDBA_EXT:
1326                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1327                                 elem_parse_failed = true;
1328                                 break;
1329                         }
1330                         elems->addba_ext_ie = (void *)pos;
1331                         break;
1332                 case WLAN_EID_TIMEOUT_INTERVAL:
1333                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1334                                 elems->timeout_int = (void *)pos;
1335                         else
1336                                 elem_parse_failed = true;
1337                         break;
1338                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1339                         if (elen >= sizeof(*elems->max_idle_period_ie))
1340                                 elems->max_idle_period_ie = (void *)pos;
1341                         break;
1342                 case WLAN_EID_RSNX:
1343                         elems->rsnx = pos;
1344                         elems->rsnx_len = elen;
1345                         break;
1346                 case WLAN_EID_EXTENSION:
1347                         ieee80211_parse_extension_element(calc_crc ?
1348                                                                 &crc : NULL,
1349                                                           elem, elems);
1350                         break;
1351                 case WLAN_EID_S1G_CAPABILITIES:
1352                         if (elen == sizeof(*elems->s1g_capab))
1353                                 elems->s1g_capab = (void *)pos;
1354                         else
1355                                 elem_parse_failed = true;
1356                         break;
1357                 case WLAN_EID_S1G_OPERATION:
1358                         if (elen == sizeof(*elems->s1g_oper))
1359                                 elems->s1g_oper = (void *)pos;
1360                         else
1361                                 elem_parse_failed = true;
1362                         break;
1363                 case WLAN_EID_S1G_BCN_COMPAT:
1364                         if (elen == sizeof(*elems->s1g_bcn_compat))
1365                                 elems->s1g_bcn_compat = (void *)pos;
1366                         else
1367                                 elem_parse_failed = true;
1368                         break;
1369                 case WLAN_EID_AID_RESPONSE:
1370                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1371                                 elems->aid_resp = (void *)pos;
1372                         else
1373                                 elem_parse_failed = true;
1374                         break;
1375                 default:
1376                         break;
1377                 }
1378
1379                 if (elem_parse_failed)
1380                         elems->parse_error = true;
1381                 else
1382                         __set_bit(id, seen_elems);
1383         }
1384
1385         if (!for_each_element_completed(elem, start, len))
1386                 elems->parse_error = true;
1387
1388         return crc;
1389 }
1390
1391 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1392                                             struct ieee802_11_elems *elems,
1393                                             u8 *transmitter_bssid,
1394                                             u8 *bss_bssid,
1395                                             u8 *nontransmitted_profile)
1396 {
1397         const struct element *elem, *sub;
1398         size_t profile_len = 0;
1399         bool found = false;
1400
1401         if (!bss_bssid || !transmitter_bssid)
1402                 return profile_len;
1403
1404         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1405                 if (elem->datalen < 2)
1406                         continue;
1407
1408                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1409                         u8 new_bssid[ETH_ALEN];
1410                         const u8 *index;
1411
1412                         if (sub->id != 0 || sub->datalen < 4) {
1413                                 /* not a valid BSS profile */
1414                                 continue;
1415                         }
1416
1417                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1418                             sub->data[1] != 2) {
1419                                 /* The first element of the
1420                                  * Nontransmitted BSSID Profile is not
1421                                  * the Nontransmitted BSSID Capability
1422                                  * element.
1423                                  */
1424                                 continue;
1425                         }
1426
1427                         memset(nontransmitted_profile, 0, len);
1428                         profile_len = cfg80211_merge_profile(start, len,
1429                                                              elem,
1430                                                              sub,
1431                                                              nontransmitted_profile,
1432                                                              len);
1433
1434                         /* found a Nontransmitted BSSID Profile */
1435                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1436                                                  nontransmitted_profile,
1437                                                  profile_len);
1438                         if (!index || index[1] < 1 || index[2] == 0) {
1439                                 /* Invalid MBSSID Index element */
1440                                 continue;
1441                         }
1442
1443                         cfg80211_gen_new_bssid(transmitter_bssid,
1444                                                elem->data[0],
1445                                                index[2],
1446                                                new_bssid);
1447                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1448                                 found = true;
1449                                 elems->bssid_index_len = index[1];
1450                                 elems->bssid_index = (void *)&index[2];
1451                                 break;
1452                         }
1453                 }
1454         }
1455
1456         return found ? profile_len : 0;
1457 }
1458
1459 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1460                                struct ieee802_11_elems *elems,
1461                                u64 filter, u32 crc, u8 *transmitter_bssid,
1462                                u8 *bss_bssid)
1463 {
1464         const struct element *non_inherit = NULL;
1465         u8 *nontransmitted_profile;
1466         int nontransmitted_profile_len = 0;
1467
1468         memset(elems, 0, sizeof(*elems));
1469         elems->ie_start = start;
1470         elems->total_len = len;
1471
1472         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1473         if (nontransmitted_profile) {
1474                 nontransmitted_profile_len =
1475                         ieee802_11_find_bssid_profile(start, len, elems,
1476                                                       transmitter_bssid,
1477                                                       bss_bssid,
1478                                                       nontransmitted_profile);
1479                 non_inherit =
1480                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1481                                                nontransmitted_profile,
1482                                                nontransmitted_profile_len);
1483         }
1484
1485         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1486                                           crc, non_inherit);
1487
1488         /* Override with nontransmitted profile, if found */
1489         if (nontransmitted_profile_len)
1490                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1491                                             nontransmitted_profile_len,
1492                                             action, elems, 0, 0, NULL);
1493
1494         if (elems->tim && !elems->parse_error) {
1495                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1496
1497                 elems->dtim_period = tim_ie->dtim_period;
1498                 elems->dtim_count = tim_ie->dtim_count;
1499         }
1500
1501         /* Override DTIM period and count if needed */
1502         if (elems->bssid_index &&
1503             elems->bssid_index_len >=
1504             offsetofend(struct ieee80211_bssid_index, dtim_period))
1505                 elems->dtim_period = elems->bssid_index->dtim_period;
1506
1507         if (elems->bssid_index &&
1508             elems->bssid_index_len >=
1509             offsetofend(struct ieee80211_bssid_index, dtim_count))
1510                 elems->dtim_count = elems->bssid_index->dtim_count;
1511
1512         kfree(nontransmitted_profile);
1513
1514         return crc;
1515 }
1516
1517 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1518                                            struct ieee80211_tx_queue_params
1519                                            *qparam, int ac)
1520 {
1521         struct ieee80211_chanctx_conf *chanctx_conf;
1522         const struct ieee80211_reg_rule *rrule;
1523         const struct ieee80211_wmm_ac *wmm_ac;
1524         u16 center_freq = 0;
1525
1526         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1527             sdata->vif.type != NL80211_IFTYPE_STATION)
1528                 return;
1529
1530         rcu_read_lock();
1531         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1532         if (chanctx_conf)
1533                 center_freq = chanctx_conf->def.chan->center_freq;
1534
1535         if (!center_freq) {
1536                 rcu_read_unlock();
1537                 return;
1538         }
1539
1540         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1541
1542         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1543                 rcu_read_unlock();
1544                 return;
1545         }
1546
1547         if (sdata->vif.type == NL80211_IFTYPE_AP)
1548                 wmm_ac = &rrule->wmm_rule.ap[ac];
1549         else
1550                 wmm_ac = &rrule->wmm_rule.client[ac];
1551         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1552         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1553         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1554         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1555         rcu_read_unlock();
1556 }
1557
1558 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1559                                bool bss_notify, bool enable_qos)
1560 {
1561         struct ieee80211_local *local = sdata->local;
1562         struct ieee80211_tx_queue_params qparam;
1563         struct ieee80211_chanctx_conf *chanctx_conf;
1564         int ac;
1565         bool use_11b;
1566         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1567         int aCWmin, aCWmax;
1568
1569         if (!local->ops->conf_tx)
1570                 return;
1571
1572         if (local->hw.queues < IEEE80211_NUM_ACS)
1573                 return;
1574
1575         memset(&qparam, 0, sizeof(qparam));
1576
1577         rcu_read_lock();
1578         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1579         use_11b = (chanctx_conf &&
1580                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1581                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1582         rcu_read_unlock();
1583
1584         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1585
1586         /* Set defaults according to 802.11-2007 Table 7-37 */
1587         aCWmax = 1023;
1588         if (use_11b)
1589                 aCWmin = 31;
1590         else
1591                 aCWmin = 15;
1592
1593         /* Confiure old 802.11b/g medium access rules. */
1594         qparam.cw_max = aCWmax;
1595         qparam.cw_min = aCWmin;
1596         qparam.txop = 0;
1597         qparam.aifs = 2;
1598
1599         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1600                 /* Update if QoS is enabled. */
1601                 if (enable_qos) {
1602                         switch (ac) {
1603                         case IEEE80211_AC_BK:
1604                                 qparam.cw_max = aCWmax;
1605                                 qparam.cw_min = aCWmin;
1606                                 qparam.txop = 0;
1607                                 if (is_ocb)
1608                                         qparam.aifs = 9;
1609                                 else
1610                                         qparam.aifs = 7;
1611                                 break;
1612                         /* never happens but let's not leave undefined */
1613                         default:
1614                         case IEEE80211_AC_BE:
1615                                 qparam.cw_max = aCWmax;
1616                                 qparam.cw_min = aCWmin;
1617                                 qparam.txop = 0;
1618                                 if (is_ocb)
1619                                         qparam.aifs = 6;
1620                                 else
1621                                         qparam.aifs = 3;
1622                                 break;
1623                         case IEEE80211_AC_VI:
1624                                 qparam.cw_max = aCWmin;
1625                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1626                                 if (is_ocb)
1627                                         qparam.txop = 0;
1628                                 else if (use_11b)
1629                                         qparam.txop = 6016/32;
1630                                 else
1631                                         qparam.txop = 3008/32;
1632
1633                                 if (is_ocb)
1634                                         qparam.aifs = 3;
1635                                 else
1636                                         qparam.aifs = 2;
1637                                 break;
1638                         case IEEE80211_AC_VO:
1639                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1640                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1641                                 if (is_ocb)
1642                                         qparam.txop = 0;
1643                                 else if (use_11b)
1644                                         qparam.txop = 3264/32;
1645                                 else
1646                                         qparam.txop = 1504/32;
1647                                 qparam.aifs = 2;
1648                                 break;
1649                         }
1650                 }
1651                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1652
1653                 qparam.uapsd = false;
1654
1655                 sdata->tx_conf[ac] = qparam;
1656                 drv_conf_tx(local, sdata, ac, &qparam);
1657         }
1658
1659         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1660             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1661             sdata->vif.type != NL80211_IFTYPE_NAN) {
1662                 sdata->vif.bss_conf.qos = enable_qos;
1663                 if (bss_notify)
1664                         ieee80211_bss_info_change_notify(sdata,
1665                                                          BSS_CHANGED_QOS);
1666         }
1667 }
1668
1669 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1670                          u16 transaction, u16 auth_alg, u16 status,
1671                          const u8 *extra, size_t extra_len, const u8 *da,
1672                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1673                          u32 tx_flags)
1674 {
1675         struct ieee80211_local *local = sdata->local;
1676         struct sk_buff *skb;
1677         struct ieee80211_mgmt *mgmt;
1678         int err;
1679
1680         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1681         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1682                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1683         if (!skb)
1684                 return;
1685
1686         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1687
1688         mgmt = skb_put_zero(skb, 24 + 6);
1689         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1690                                           IEEE80211_STYPE_AUTH);
1691         memcpy(mgmt->da, da, ETH_ALEN);
1692         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1693         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1694         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1695         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1696         mgmt->u.auth.status_code = cpu_to_le16(status);
1697         if (extra)
1698                 skb_put_data(skb, extra, extra_len);
1699
1700         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1701                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1702                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1703                 WARN_ON(err);
1704         }
1705
1706         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1707                                         tx_flags;
1708         ieee80211_tx_skb(sdata, skb);
1709 }
1710
1711 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1712                                     const u8 *da, const u8 *bssid,
1713                                     u16 stype, u16 reason,
1714                                     bool send_frame, u8 *frame_buf)
1715 {
1716         struct ieee80211_local *local = sdata->local;
1717         struct sk_buff *skb;
1718         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1719
1720         /* build frame */
1721         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1722         mgmt->duration = 0; /* initialize only */
1723         mgmt->seq_ctrl = 0; /* initialize only */
1724         memcpy(mgmt->da, da, ETH_ALEN);
1725         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1726         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1727         /* u.deauth.reason_code == u.disassoc.reason_code */
1728         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1729
1730         if (send_frame) {
1731                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1732                                     IEEE80211_DEAUTH_FRAME_LEN);
1733                 if (!skb)
1734                         return;
1735
1736                 skb_reserve(skb, local->hw.extra_tx_headroom);
1737
1738                 /* copy in frame */
1739                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1740
1741                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1742                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1743                         IEEE80211_SKB_CB(skb)->flags |=
1744                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1745
1746                 ieee80211_tx_skb(sdata, skb);
1747         }
1748 }
1749
1750 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1751 {
1752         if ((end - pos) < 5)
1753                 return pos;
1754
1755         *pos++ = WLAN_EID_EXTENSION;
1756         *pos++ = 1 + sizeof(cap);
1757         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1758         memcpy(pos, &cap, sizeof(cap));
1759
1760         return pos + 2;
1761 }
1762
1763 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1764                                          u8 *buffer, size_t buffer_len,
1765                                          const u8 *ie, size_t ie_len,
1766                                          enum nl80211_band band,
1767                                          u32 rate_mask,
1768                                          struct cfg80211_chan_def *chandef,
1769                                          size_t *offset, u32 flags)
1770 {
1771         struct ieee80211_local *local = sdata->local;
1772         struct ieee80211_supported_band *sband;
1773         const struct ieee80211_sta_he_cap *he_cap;
1774         u8 *pos = buffer, *end = buffer + buffer_len;
1775         size_t noffset;
1776         int supp_rates_len, i;
1777         u8 rates[32];
1778         int num_rates;
1779         int ext_rates_len;
1780         int shift;
1781         u32 rate_flags;
1782         bool have_80mhz = false;
1783
1784         *offset = 0;
1785
1786         sband = local->hw.wiphy->bands[band];
1787         if (WARN_ON_ONCE(!sband))
1788                 return 0;
1789
1790         rate_flags = ieee80211_chandef_rate_flags(chandef);
1791         shift = ieee80211_chandef_get_shift(chandef);
1792
1793         num_rates = 0;
1794         for (i = 0; i < sband->n_bitrates; i++) {
1795                 if ((BIT(i) & rate_mask) == 0)
1796                         continue; /* skip rate */
1797                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1798                         continue;
1799
1800                 rates[num_rates++] =
1801                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1802                                           (1 << shift) * 5);
1803         }
1804
1805         supp_rates_len = min_t(int, num_rates, 8);
1806
1807         if (end - pos < 2 + supp_rates_len)
1808                 goto out_err;
1809         *pos++ = WLAN_EID_SUPP_RATES;
1810         *pos++ = supp_rates_len;
1811         memcpy(pos, rates, supp_rates_len);
1812         pos += supp_rates_len;
1813
1814         /* insert "request information" if in custom IEs */
1815         if (ie && ie_len) {
1816                 static const u8 before_extrates[] = {
1817                         WLAN_EID_SSID,
1818                         WLAN_EID_SUPP_RATES,
1819                         WLAN_EID_REQUEST,
1820                 };
1821                 noffset = ieee80211_ie_split(ie, ie_len,
1822                                              before_extrates,
1823                                              ARRAY_SIZE(before_extrates),
1824                                              *offset);
1825                 if (end - pos < noffset - *offset)
1826                         goto out_err;
1827                 memcpy(pos, ie + *offset, noffset - *offset);
1828                 pos += noffset - *offset;
1829                 *offset = noffset;
1830         }
1831
1832         ext_rates_len = num_rates - supp_rates_len;
1833         if (ext_rates_len > 0) {
1834                 if (end - pos < 2 + ext_rates_len)
1835                         goto out_err;
1836                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1837                 *pos++ = ext_rates_len;
1838                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1839                 pos += ext_rates_len;
1840         }
1841
1842         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1843                 if (end - pos < 3)
1844                         goto out_err;
1845                 *pos++ = WLAN_EID_DS_PARAMS;
1846                 *pos++ = 1;
1847                 *pos++ = ieee80211_frequency_to_channel(
1848                                 chandef->chan->center_freq);
1849         }
1850
1851         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1852                 goto done;
1853
1854         /* insert custom IEs that go before HT */
1855         if (ie && ie_len) {
1856                 static const u8 before_ht[] = {
1857                         /*
1858                          * no need to list the ones split off already
1859                          * (or generated here)
1860                          */
1861                         WLAN_EID_DS_PARAMS,
1862                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1863                 };
1864                 noffset = ieee80211_ie_split(ie, ie_len,
1865                                              before_ht, ARRAY_SIZE(before_ht),
1866                                              *offset);
1867                 if (end - pos < noffset - *offset)
1868                         goto out_err;
1869                 memcpy(pos, ie + *offset, noffset - *offset);
1870                 pos += noffset - *offset;
1871                 *offset = noffset;
1872         }
1873
1874         if (sband->ht_cap.ht_supported) {
1875                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1876                         goto out_err;
1877                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1878                                                 sband->ht_cap.cap);
1879         }
1880
1881         /* insert custom IEs that go before VHT */
1882         if (ie && ie_len) {
1883                 static const u8 before_vht[] = {
1884                         /*
1885                          * no need to list the ones split off already
1886                          * (or generated here)
1887                          */
1888                         WLAN_EID_BSS_COEX_2040,
1889                         WLAN_EID_EXT_CAPABILITY,
1890                         WLAN_EID_SSID_LIST,
1891                         WLAN_EID_CHANNEL_USAGE,
1892                         WLAN_EID_INTERWORKING,
1893                         WLAN_EID_MESH_ID,
1894                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1895                 };
1896                 noffset = ieee80211_ie_split(ie, ie_len,
1897                                              before_vht, ARRAY_SIZE(before_vht),
1898                                              *offset);
1899                 if (end - pos < noffset - *offset)
1900                         goto out_err;
1901                 memcpy(pos, ie + *offset, noffset - *offset);
1902                 pos += noffset - *offset;
1903                 *offset = noffset;
1904         }
1905
1906         /* Check if any channel in this sband supports at least 80 MHz */
1907         for (i = 0; i < sband->n_channels; i++) {
1908                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1909                                                 IEEE80211_CHAN_NO_80MHZ))
1910                         continue;
1911
1912                 have_80mhz = true;
1913                 break;
1914         }
1915
1916         if (sband->vht_cap.vht_supported && have_80mhz) {
1917                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1918                         goto out_err;
1919                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1920                                                  sband->vht_cap.cap);
1921         }
1922
1923         /* insert custom IEs that go before HE */
1924         if (ie && ie_len) {
1925                 static const u8 before_he[] = {
1926                         /*
1927                          * no need to list the ones split off before VHT
1928                          * or generated here
1929                          */
1930                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1931                         WLAN_EID_AP_CSN,
1932                         /* TODO: add 11ah/11aj/11ak elements */
1933                 };
1934                 noffset = ieee80211_ie_split(ie, ie_len,
1935                                              before_he, ARRAY_SIZE(before_he),
1936                                              *offset);
1937                 if (end - pos < noffset - *offset)
1938                         goto out_err;
1939                 memcpy(pos, ie + *offset, noffset - *offset);
1940                 pos += noffset - *offset;
1941                 *offset = noffset;
1942         }
1943
1944         he_cap = ieee80211_get_he_sta_cap(sband);
1945         if (he_cap) {
1946                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1947                 if (!pos)
1948                         goto out_err;
1949
1950                 if (sband->band == NL80211_BAND_6GHZ) {
1951                         enum nl80211_iftype iftype =
1952                                 ieee80211_vif_type_p2p(&sdata->vif);
1953                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1954
1955                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1956                 }
1957         }
1958
1959         /*
1960          * If adding more here, adjust code in main.c
1961          * that calculates local->scan_ies_len.
1962          */
1963
1964         return pos - buffer;
1965  out_err:
1966         WARN_ONCE(1, "not enough space for preq IEs\n");
1967  done:
1968         return pos - buffer;
1969 }
1970
1971 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1972                              size_t buffer_len,
1973                              struct ieee80211_scan_ies *ie_desc,
1974                              const u8 *ie, size_t ie_len,
1975                              u8 bands_used, u32 *rate_masks,
1976                              struct cfg80211_chan_def *chandef,
1977                              u32 flags)
1978 {
1979         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1980         int i;
1981
1982         memset(ie_desc, 0, sizeof(*ie_desc));
1983
1984         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1985                 if (bands_used & BIT(i)) {
1986                         pos += ieee80211_build_preq_ies_band(sdata,
1987                                                              buffer + pos,
1988                                                              buffer_len - pos,
1989                                                              ie, ie_len, i,
1990                                                              rate_masks[i],
1991                                                              chandef,
1992                                                              &custom_ie_offset,
1993                                                              flags);
1994                         ie_desc->ies[i] = buffer + old_pos;
1995                         ie_desc->len[i] = pos - old_pos;
1996                         old_pos = pos;
1997                 }
1998         }
1999
2000         /* add any remaining custom IEs */
2001         if (ie && ie_len) {
2002                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2003                               "not enough space for preq custom IEs\n"))
2004                         return pos;
2005                 memcpy(buffer + pos, ie + custom_ie_offset,
2006                        ie_len - custom_ie_offset);
2007                 ie_desc->common_ies = buffer + pos;
2008                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2009                 pos += ie_len - custom_ie_offset;
2010         }
2011
2012         return pos;
2013 };
2014
2015 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2016                                           const u8 *src, const u8 *dst,
2017                                           u32 ratemask,
2018                                           struct ieee80211_channel *chan,
2019                                           const u8 *ssid, size_t ssid_len,
2020                                           const u8 *ie, size_t ie_len,
2021                                           u32 flags)
2022 {
2023         struct ieee80211_local *local = sdata->local;
2024         struct cfg80211_chan_def chandef;
2025         struct sk_buff *skb;
2026         struct ieee80211_mgmt *mgmt;
2027         int ies_len;
2028         u32 rate_masks[NUM_NL80211_BANDS] = {};
2029         struct ieee80211_scan_ies dummy_ie_desc;
2030
2031         /*
2032          * Do not send DS Channel parameter for directed probe requests
2033          * in order to maximize the chance that we get a response.  Some
2034          * badly-behaved APs don't respond when this parameter is included.
2035          */
2036         chandef.width = sdata->vif.bss_conf.chandef.width;
2037         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2038                 chandef.chan = NULL;
2039         else
2040                 chandef.chan = chan;
2041
2042         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2043                                      100 + ie_len);
2044         if (!skb)
2045                 return NULL;
2046
2047         rate_masks[chan->band] = ratemask;
2048         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2049                                            skb_tailroom(skb), &dummy_ie_desc,
2050                                            ie, ie_len, BIT(chan->band),
2051                                            rate_masks, &chandef, flags);
2052         skb_put(skb, ies_len);
2053
2054         if (dst) {
2055                 mgmt = (struct ieee80211_mgmt *) skb->data;
2056                 memcpy(mgmt->da, dst, ETH_ALEN);
2057                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2058         }
2059
2060         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2061
2062         return skb;
2063 }
2064
2065 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2066                             struct ieee802_11_elems *elems,
2067                             enum nl80211_band band, u32 *basic_rates)
2068 {
2069         struct ieee80211_supported_band *sband;
2070         size_t num_rates;
2071         u32 supp_rates, rate_flags;
2072         int i, j, shift;
2073
2074         sband = sdata->local->hw.wiphy->bands[band];
2075         if (WARN_ON(!sband))
2076                 return 1;
2077
2078         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2079         shift = ieee80211_vif_get_shift(&sdata->vif);
2080
2081         num_rates = sband->n_bitrates;
2082         supp_rates = 0;
2083         for (i = 0; i < elems->supp_rates_len +
2084                      elems->ext_supp_rates_len; i++) {
2085                 u8 rate = 0;
2086                 int own_rate;
2087                 bool is_basic;
2088                 if (i < elems->supp_rates_len)
2089                         rate = elems->supp_rates[i];
2090                 else if (elems->ext_supp_rates)
2091                         rate = elems->ext_supp_rates
2092                                 [i - elems->supp_rates_len];
2093                 own_rate = 5 * (rate & 0x7f);
2094                 is_basic = !!(rate & 0x80);
2095
2096                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2097                         continue;
2098
2099                 for (j = 0; j < num_rates; j++) {
2100                         int brate;
2101                         if ((rate_flags & sband->bitrates[j].flags)
2102                             != rate_flags)
2103                                 continue;
2104
2105                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2106                                              1 << shift);
2107
2108                         if (brate == own_rate) {
2109                                 supp_rates |= BIT(j);
2110                                 if (basic_rates && is_basic)
2111                                         *basic_rates |= BIT(j);
2112                         }
2113                 }
2114         }
2115         return supp_rates;
2116 }
2117
2118 void ieee80211_stop_device(struct ieee80211_local *local)
2119 {
2120         ieee80211_led_radio(local, false);
2121         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2122
2123         cancel_work_sync(&local->reconfig_filter);
2124
2125         flush_workqueue(local->workqueue);
2126         drv_stop(local);
2127 }
2128
2129 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2130                                            bool aborted)
2131 {
2132         /* It's possible that we don't handle the scan completion in
2133          * time during suspend, so if it's still marked as completed
2134          * here, queue the work and flush it to clean things up.
2135          * Instead of calling the worker function directly here, we
2136          * really queue it to avoid potential races with other flows
2137          * scheduling the same work.
2138          */
2139         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2140                 /* If coming from reconfiguration failure, abort the scan so
2141                  * we don't attempt to continue a partial HW scan - which is
2142                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2143                  * completed scan, and a 5 GHz portion is still pending.
2144                  */
2145                 if (aborted)
2146                         set_bit(SCAN_ABORTED, &local->scanning);
2147                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2148                 flush_delayed_work(&local->scan_work);
2149         }
2150 }
2151
2152 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2153 {
2154         struct ieee80211_sub_if_data *sdata;
2155         struct ieee80211_chanctx *ctx;
2156
2157         /*
2158          * We get here if during resume the device can't be restarted properly.
2159          * We might also get here if this happens during HW reset, which is a
2160          * slightly different situation and we need to drop all connections in
2161          * the latter case.
2162          *
2163          * Ask cfg80211 to turn off all interfaces, this will result in more
2164          * warnings but at least we'll then get into a clean stopped state.
2165          */
2166
2167         local->resuming = false;
2168         local->suspended = false;
2169         local->in_reconfig = false;
2170
2171         ieee80211_flush_completed_scan(local, true);
2172
2173         /* scheduled scan clearly can't be running any more, but tell
2174          * cfg80211 and clear local state
2175          */
2176         ieee80211_sched_scan_end(local);
2177
2178         list_for_each_entry(sdata, &local->interfaces, list)
2179                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2180
2181         /* Mark channel contexts as not being in the driver any more to avoid
2182          * removing them from the driver during the shutdown process...
2183          */
2184         mutex_lock(&local->chanctx_mtx);
2185         list_for_each_entry(ctx, &local->chanctx_list, list)
2186                 ctx->driver_present = false;
2187         mutex_unlock(&local->chanctx_mtx);
2188
2189         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2190 }
2191
2192 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2193                                      struct ieee80211_sub_if_data *sdata)
2194 {
2195         struct ieee80211_chanctx_conf *conf;
2196         struct ieee80211_chanctx *ctx;
2197
2198         if (!local->use_chanctx)
2199                 return;
2200
2201         mutex_lock(&local->chanctx_mtx);
2202         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2203                                          lockdep_is_held(&local->chanctx_mtx));
2204         if (conf) {
2205                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2206                 drv_assign_vif_chanctx(local, sdata, ctx);
2207         }
2208         mutex_unlock(&local->chanctx_mtx);
2209 }
2210
2211 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2212 {
2213         struct ieee80211_local *local = sdata->local;
2214         struct sta_info *sta;
2215
2216         /* add STAs back */
2217         mutex_lock(&local->sta_mtx);
2218         list_for_each_entry(sta, &local->sta_list, list) {
2219                 enum ieee80211_sta_state state;
2220
2221                 if (!sta->uploaded || sta->sdata != sdata)
2222                         continue;
2223
2224                 for (state = IEEE80211_STA_NOTEXIST;
2225                      state < sta->sta_state; state++)
2226                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2227                                               state + 1));
2228         }
2229         mutex_unlock(&local->sta_mtx);
2230 }
2231
2232 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2233 {
2234         struct cfg80211_nan_func *func, **funcs;
2235         int res, id, i = 0;
2236
2237         res = drv_start_nan(sdata->local, sdata,
2238                             &sdata->u.nan.conf);
2239         if (WARN_ON(res))
2240                 return res;
2241
2242         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2243                         sizeof(*funcs),
2244                         GFP_KERNEL);
2245         if (!funcs)
2246                 return -ENOMEM;
2247
2248         /* Add all the functions:
2249          * This is a little bit ugly. We need to call a potentially sleeping
2250          * callback for each NAN function, so we can't hold the spinlock.
2251          */
2252         spin_lock_bh(&sdata->u.nan.func_lock);
2253
2254         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2255                 funcs[i++] = func;
2256
2257         spin_unlock_bh(&sdata->u.nan.func_lock);
2258
2259         for (i = 0; funcs[i]; i++) {
2260                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2261                 if (WARN_ON(res))
2262                         ieee80211_nan_func_terminated(&sdata->vif,
2263                                                       funcs[i]->instance_id,
2264                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2265                                                       GFP_KERNEL);
2266         }
2267
2268         kfree(funcs);
2269
2270         return 0;
2271 }
2272
2273 int ieee80211_reconfig(struct ieee80211_local *local)
2274 {
2275         struct ieee80211_hw *hw = &local->hw;
2276         struct ieee80211_sub_if_data *sdata;
2277         struct ieee80211_chanctx *ctx;
2278         struct sta_info *sta;
2279         int res, i;
2280         bool reconfig_due_to_wowlan = false;
2281         struct ieee80211_sub_if_data *sched_scan_sdata;
2282         struct cfg80211_sched_scan_request *sched_scan_req;
2283         bool sched_scan_stopped = false;
2284         bool suspended = local->suspended;
2285
2286         /* nothing to do if HW shouldn't run */
2287         if (!local->open_count)
2288                 goto wake_up;
2289
2290 #ifdef CONFIG_PM
2291         if (suspended)
2292                 local->resuming = true;
2293
2294         if (local->wowlan) {
2295                 /*
2296                  * In the wowlan case, both mac80211 and the device
2297                  * are functional when the resume op is called, so
2298                  * clear local->suspended so the device could operate
2299                  * normally (e.g. pass rx frames).
2300                  */
2301                 local->suspended = false;
2302                 res = drv_resume(local);
2303                 local->wowlan = false;
2304                 if (res < 0) {
2305                         local->resuming = false;
2306                         return res;
2307                 }
2308                 if (res == 0)
2309                         goto wake_up;
2310                 WARN_ON(res > 1);
2311                 /*
2312                  * res is 1, which means the driver requested
2313                  * to go through a regular reset on wakeup.
2314                  * restore local->suspended in this case.
2315                  */
2316                 reconfig_due_to_wowlan = true;
2317                 local->suspended = true;
2318         }
2319 #endif
2320
2321         /*
2322          * In case of hw_restart during suspend (without wowlan),
2323          * cancel restart work, as we are reconfiguring the device
2324          * anyway.
2325          * Note that restart_work is scheduled on a frozen workqueue,
2326          * so we can't deadlock in this case.
2327          */
2328         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2329                 cancel_work_sync(&local->restart_work);
2330
2331         local->started = false;
2332
2333         /*
2334          * Upon resume hardware can sometimes be goofy due to
2335          * various platform / driver / bus issues, so restarting
2336          * the device may at times not work immediately. Propagate
2337          * the error.
2338          */
2339         res = drv_start(local);
2340         if (res) {
2341                 if (suspended)
2342                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2343                 else
2344                         WARN(1, "Hardware became unavailable during restart.\n");
2345                 ieee80211_handle_reconfig_failure(local);
2346                 return res;
2347         }
2348
2349         /* setup fragmentation threshold */
2350         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2351
2352         /* setup RTS threshold */
2353         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2354
2355         /* reset coverage class */
2356         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2357
2358         ieee80211_led_radio(local, true);
2359         ieee80211_mod_tpt_led_trig(local,
2360                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2361
2362         /* add interfaces */
2363         sdata = rtnl_dereference(local->monitor_sdata);
2364         if (sdata) {
2365                 /* in HW restart it exists already */
2366                 WARN_ON(local->resuming);
2367                 res = drv_add_interface(local, sdata);
2368                 if (WARN_ON(res)) {
2369                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2370                         synchronize_net();
2371                         kfree(sdata);
2372                 }
2373         }
2374
2375         list_for_each_entry(sdata, &local->interfaces, list) {
2376                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2377                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2378                     ieee80211_sdata_running(sdata)) {
2379                         res = drv_add_interface(local, sdata);
2380                         if (WARN_ON(res))
2381                                 break;
2382                 }
2383         }
2384
2385         /* If adding any of the interfaces failed above, roll back and
2386          * report failure.
2387          */
2388         if (res) {
2389                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2390                                                      list)
2391                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2392                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2393                             ieee80211_sdata_running(sdata))
2394                                 drv_remove_interface(local, sdata);
2395                 ieee80211_handle_reconfig_failure(local);
2396                 return res;
2397         }
2398
2399         /* add channel contexts */
2400         if (local->use_chanctx) {
2401                 mutex_lock(&local->chanctx_mtx);
2402                 list_for_each_entry(ctx, &local->chanctx_list, list)
2403                         if (ctx->replace_state !=
2404                             IEEE80211_CHANCTX_REPLACES_OTHER)
2405                                 WARN_ON(drv_add_chanctx(local, ctx));
2406                 mutex_unlock(&local->chanctx_mtx);
2407
2408                 sdata = rtnl_dereference(local->monitor_sdata);
2409                 if (sdata && ieee80211_sdata_running(sdata))
2410                         ieee80211_assign_chanctx(local, sdata);
2411         }
2412
2413         /* reconfigure hardware */
2414         ieee80211_hw_config(local, ~0);
2415
2416         ieee80211_configure_filter(local);
2417
2418         /* Finally also reconfigure all the BSS information */
2419         list_for_each_entry(sdata, &local->interfaces, list) {
2420                 u32 changed;
2421
2422                 if (!ieee80211_sdata_running(sdata))
2423                         continue;
2424
2425                 ieee80211_assign_chanctx(local, sdata);
2426
2427                 switch (sdata->vif.type) {
2428                 case NL80211_IFTYPE_AP_VLAN:
2429                 case NL80211_IFTYPE_MONITOR:
2430                         break;
2431                 case NL80211_IFTYPE_ADHOC:
2432                         if (sdata->vif.bss_conf.ibss_joined)
2433                                 WARN_ON(drv_join_ibss(local, sdata));
2434                         fallthrough;
2435                 default:
2436                         ieee80211_reconfig_stations(sdata);
2437                         fallthrough;
2438                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2439                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2440                                 drv_conf_tx(local, sdata, i,
2441                                             &sdata->tx_conf[i]);
2442                         break;
2443                 }
2444
2445                 /* common change flags for all interface types */
2446                 changed = BSS_CHANGED_ERP_CTS_PROT |
2447                           BSS_CHANGED_ERP_PREAMBLE |
2448                           BSS_CHANGED_ERP_SLOT |
2449                           BSS_CHANGED_HT |
2450                           BSS_CHANGED_BASIC_RATES |
2451                           BSS_CHANGED_BEACON_INT |
2452                           BSS_CHANGED_BSSID |
2453                           BSS_CHANGED_CQM |
2454                           BSS_CHANGED_QOS |
2455                           BSS_CHANGED_IDLE |
2456                           BSS_CHANGED_TXPOWER |
2457                           BSS_CHANGED_MCAST_RATE;
2458
2459                 if (sdata->vif.mu_mimo_owner)
2460                         changed |= BSS_CHANGED_MU_GROUPS;
2461
2462                 switch (sdata->vif.type) {
2463                 case NL80211_IFTYPE_STATION:
2464                         changed |= BSS_CHANGED_ASSOC |
2465                                    BSS_CHANGED_ARP_FILTER |
2466                                    BSS_CHANGED_PS;
2467
2468                         /* Re-send beacon info report to the driver */
2469                         if (sdata->u.mgd.have_beacon)
2470                                 changed |= BSS_CHANGED_BEACON_INFO;
2471
2472                         if (sdata->vif.bss_conf.max_idle_period ||
2473                             sdata->vif.bss_conf.protected_keep_alive)
2474                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2475
2476                         sdata_lock(sdata);
2477                         ieee80211_bss_info_change_notify(sdata, changed);
2478                         sdata_unlock(sdata);
2479                         break;
2480                 case NL80211_IFTYPE_OCB:
2481                         changed |= BSS_CHANGED_OCB;
2482                         ieee80211_bss_info_change_notify(sdata, changed);
2483                         break;
2484                 case NL80211_IFTYPE_ADHOC:
2485                         changed |= BSS_CHANGED_IBSS;
2486                         fallthrough;
2487                 case NL80211_IFTYPE_AP:
2488                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2489
2490                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2491                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2492                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2493                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2494
2495                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2496                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2497
2498                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2499                                         drv_start_ap(local, sdata);
2500                         }
2501                         fallthrough;
2502                 case NL80211_IFTYPE_MESH_POINT:
2503                         if (sdata->vif.bss_conf.enable_beacon) {
2504                                 changed |= BSS_CHANGED_BEACON |
2505                                            BSS_CHANGED_BEACON_ENABLED;
2506                                 ieee80211_bss_info_change_notify(sdata, changed);
2507                         }
2508                         break;
2509                 case NL80211_IFTYPE_NAN:
2510                         res = ieee80211_reconfig_nan(sdata);
2511                         if (res < 0) {
2512                                 ieee80211_handle_reconfig_failure(local);
2513                                 return res;
2514                         }
2515                         break;
2516                 case NL80211_IFTYPE_WDS:
2517                 case NL80211_IFTYPE_AP_VLAN:
2518                 case NL80211_IFTYPE_MONITOR:
2519                 case NL80211_IFTYPE_P2P_DEVICE:
2520                         /* nothing to do */
2521                         break;
2522                 case NL80211_IFTYPE_UNSPECIFIED:
2523                 case NUM_NL80211_IFTYPES:
2524                 case NL80211_IFTYPE_P2P_CLIENT:
2525                 case NL80211_IFTYPE_P2P_GO:
2526                         WARN_ON(1);
2527                         break;
2528                 }
2529         }
2530
2531         ieee80211_recalc_ps(local);
2532
2533         /*
2534          * The sta might be in psm against the ap (e.g. because
2535          * this was the state before a hw restart), so we
2536          * explicitly send a null packet in order to make sure
2537          * it'll sync against the ap (and get out of psm).
2538          */
2539         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2540                 list_for_each_entry(sdata, &local->interfaces, list) {
2541                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2542                                 continue;
2543                         if (!sdata->u.mgd.associated)
2544                                 continue;
2545
2546                         ieee80211_send_nullfunc(local, sdata, false);
2547                 }
2548         }
2549
2550         /* APs are now beaconing, add back stations */
2551         mutex_lock(&local->sta_mtx);
2552         list_for_each_entry(sta, &local->sta_list, list) {
2553                 enum ieee80211_sta_state state;
2554
2555                 if (!sta->uploaded)
2556                         continue;
2557
2558                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2559                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2560                         continue;
2561
2562                 for (state = IEEE80211_STA_NOTEXIST;
2563                      state < sta->sta_state; state++)
2564                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2565                                               state + 1));
2566         }
2567         mutex_unlock(&local->sta_mtx);
2568
2569         /* add back keys */
2570         list_for_each_entry(sdata, &local->interfaces, list)
2571                 ieee80211_reenable_keys(sdata);
2572
2573         /* Reconfigure sched scan if it was interrupted by FW restart */
2574         mutex_lock(&local->mtx);
2575         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2576                                                 lockdep_is_held(&local->mtx));
2577         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2578                                                 lockdep_is_held(&local->mtx));
2579         if (sched_scan_sdata && sched_scan_req)
2580                 /*
2581                  * Sched scan stopped, but we don't want to report it. Instead,
2582                  * we're trying to reschedule. However, if more than one scan
2583                  * plan was set, we cannot reschedule since we don't know which
2584                  * scan plan was currently running (and some scan plans may have
2585                  * already finished).
2586                  */
2587                 if (sched_scan_req->n_scan_plans > 1 ||
2588                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2589                                                          sched_scan_req)) {
2590                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2591                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2592                         sched_scan_stopped = true;
2593                 }
2594         mutex_unlock(&local->mtx);
2595
2596         if (sched_scan_stopped)
2597                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2598
2599  wake_up:
2600
2601         if (local->monitors == local->open_count && local->monitors > 0)
2602                 ieee80211_add_virtual_monitor(local);
2603
2604         /*
2605          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2606          * sessions can be established after a resume.
2607          *
2608          * Also tear down aggregation sessions since reconfiguring
2609          * them in a hardware restart scenario is not easily done
2610          * right now, and the hardware will have lost information
2611          * about the sessions, but we and the AP still think they
2612          * are active. This is really a workaround though.
2613          */
2614         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2615                 mutex_lock(&local->sta_mtx);
2616
2617                 list_for_each_entry(sta, &local->sta_list, list) {
2618                         if (!local->resuming)
2619                                 ieee80211_sta_tear_down_BA_sessions(
2620                                                 sta, AGG_STOP_LOCAL_REQUEST);
2621                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2622                 }
2623
2624                 mutex_unlock(&local->sta_mtx);
2625         }
2626
2627         if (local->in_reconfig) {
2628                 local->in_reconfig = false;
2629                 barrier();
2630
2631                 /* Restart deferred ROCs */
2632                 mutex_lock(&local->mtx);
2633                 ieee80211_start_next_roc(local);
2634                 mutex_unlock(&local->mtx);
2635
2636                 /* Requeue all works */
2637                 list_for_each_entry(sdata, &local->interfaces, list)
2638                         ieee80211_queue_work(&local->hw, &sdata->work);
2639         }
2640
2641         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2642                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2643                                         false);
2644
2645         /*
2646          * If this is for hw restart things are still running.
2647          * We may want to change that later, however.
2648          */
2649         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2650                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2651
2652         if (!suspended)
2653                 return 0;
2654
2655 #ifdef CONFIG_PM
2656         /* first set suspended false, then resuming */
2657         local->suspended = false;
2658         mb();
2659         local->resuming = false;
2660
2661         ieee80211_flush_completed_scan(local, false);
2662
2663         if (local->open_count && !reconfig_due_to_wowlan)
2664                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2665
2666         list_for_each_entry(sdata, &local->interfaces, list) {
2667                 if (!ieee80211_sdata_running(sdata))
2668                         continue;
2669                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2670                         ieee80211_sta_restart(sdata);
2671         }
2672
2673         mod_timer(&local->sta_cleanup, jiffies + 1);
2674 #else
2675         WARN_ON(1);
2676 #endif
2677
2678         return 0;
2679 }
2680
2681 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2682 {
2683         struct ieee80211_sub_if_data *sdata;
2684         struct ieee80211_local *local;
2685         struct ieee80211_key *key;
2686
2687         if (WARN_ON(!vif))
2688                 return;
2689
2690         sdata = vif_to_sdata(vif);
2691         local = sdata->local;
2692
2693         if (WARN_ON(!local->resuming))
2694                 return;
2695
2696         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2697                 return;
2698
2699         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2700
2701         mutex_lock(&local->key_mtx);
2702         list_for_each_entry(key, &sdata->key_list, list)
2703                 key->flags |= KEY_FLAG_TAINTED;
2704         mutex_unlock(&local->key_mtx);
2705 }
2706 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2707
2708 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2709 {
2710         struct ieee80211_local *local = sdata->local;
2711         struct ieee80211_chanctx_conf *chanctx_conf;
2712         struct ieee80211_chanctx *chanctx;
2713
2714         mutex_lock(&local->chanctx_mtx);
2715
2716         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2717                                         lockdep_is_held(&local->chanctx_mtx));
2718
2719         /*
2720          * This function can be called from a work, thus it may be possible
2721          * that the chanctx_conf is removed (due to a disconnection, for
2722          * example).
2723          * So nothing should be done in such case.
2724          */
2725         if (!chanctx_conf)
2726                 goto unlock;
2727
2728         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2729         ieee80211_recalc_smps_chanctx(local, chanctx);
2730  unlock:
2731         mutex_unlock(&local->chanctx_mtx);
2732 }
2733
2734 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2735 {
2736         struct ieee80211_local *local = sdata->local;
2737         struct ieee80211_chanctx_conf *chanctx_conf;
2738         struct ieee80211_chanctx *chanctx;
2739
2740         mutex_lock(&local->chanctx_mtx);
2741
2742         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2743                                         lockdep_is_held(&local->chanctx_mtx));
2744
2745         if (WARN_ON_ONCE(!chanctx_conf))
2746                 goto unlock;
2747
2748         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2749         ieee80211_recalc_chanctx_min_def(local, chanctx);
2750  unlock:
2751         mutex_unlock(&local->chanctx_mtx);
2752 }
2753
2754 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2755 {
2756         size_t pos = offset;
2757
2758         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2759                 pos += 2 + ies[pos + 1];
2760
2761         return pos;
2762 }
2763
2764 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2765                                             int rssi_min_thold,
2766                                             int rssi_max_thold)
2767 {
2768         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2769
2770         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2771                 return;
2772
2773         /*
2774          * Scale up threshold values before storing it, as the RSSI averaging
2775          * algorithm uses a scaled up value as well. Change this scaling
2776          * factor if the RSSI averaging algorithm changes.
2777          */
2778         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2779         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2780 }
2781
2782 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2783                                     int rssi_min_thold,
2784                                     int rssi_max_thold)
2785 {
2786         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2787
2788         WARN_ON(rssi_min_thold == rssi_max_thold ||
2789                 rssi_min_thold > rssi_max_thold);
2790
2791         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2792                                        rssi_max_thold);
2793 }
2794 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2795
2796 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2797 {
2798         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2799
2800         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2801 }
2802 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2803
2804 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2805                               u16 cap)
2806 {
2807         __le16 tmp;
2808
2809         *pos++ = WLAN_EID_HT_CAPABILITY;
2810         *pos++ = sizeof(struct ieee80211_ht_cap);
2811         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2812
2813         /* capability flags */
2814         tmp = cpu_to_le16(cap);
2815         memcpy(pos, &tmp, sizeof(u16));
2816         pos += sizeof(u16);
2817
2818         /* AMPDU parameters */
2819         *pos++ = ht_cap->ampdu_factor |
2820                  (ht_cap->ampdu_density <<
2821                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2822
2823         /* MCS set */
2824         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2825         pos += sizeof(ht_cap->mcs);
2826
2827         /* extended capabilities */
2828         pos += sizeof(__le16);
2829
2830         /* BF capabilities */
2831         pos += sizeof(__le32);
2832
2833         /* antenna selection */
2834         pos += sizeof(u8);
2835
2836         return pos;
2837 }
2838
2839 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2840                                u32 cap)
2841 {
2842         __le32 tmp;
2843
2844         *pos++ = WLAN_EID_VHT_CAPABILITY;
2845         *pos++ = sizeof(struct ieee80211_vht_cap);
2846         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2847
2848         /* capability flags */
2849         tmp = cpu_to_le32(cap);
2850         memcpy(pos, &tmp, sizeof(u32));
2851         pos += sizeof(u32);
2852
2853         /* VHT MCS set */
2854         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2855         pos += sizeof(vht_cap->vht_mcs);
2856
2857         return pos;
2858 }
2859
2860 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2861 {
2862         const struct ieee80211_sta_he_cap *he_cap;
2863         struct ieee80211_supported_band *sband;
2864         u8 n;
2865
2866         sband = ieee80211_get_sband(sdata);
2867         if (!sband)
2868                 return 0;
2869
2870         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2871         if (!he_cap)
2872                 return 0;
2873
2874         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2875         return 2 + 1 +
2876                sizeof(he_cap->he_cap_elem) + n +
2877                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2878                                      he_cap->he_cap_elem.phy_cap_info);
2879 }
2880
2881 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2882                               const struct ieee80211_sta_he_cap *he_cap,
2883                               u8 *end)
2884 {
2885         u8 n;
2886         u8 ie_len;
2887         u8 *orig_pos = pos;
2888
2889         /* Make sure we have place for the IE */
2890         /*
2891          * TODO: the 1 added is because this temporarily is under the EXTENSION
2892          * IE. Get rid of it when it moves.
2893          */
2894         if (!he_cap)
2895                 return orig_pos;
2896
2897         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2898         ie_len = 2 + 1 +
2899                  sizeof(he_cap->he_cap_elem) + n +
2900                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2901                                        he_cap->he_cap_elem.phy_cap_info);
2902
2903         if ((end - pos) < ie_len)
2904                 return orig_pos;
2905
2906         *pos++ = WLAN_EID_EXTENSION;
2907         pos++; /* We'll set the size later below */
2908         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2909
2910         /* Fixed data */
2911         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2912         pos += sizeof(he_cap->he_cap_elem);
2913
2914         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2915         pos += n;
2916
2917         /* Check if PPE Threshold should be present */
2918         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2919              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2920                 goto end;
2921
2922         /*
2923          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2924          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2925          */
2926         n = hweight8(he_cap->ppe_thres[0] &
2927                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2928         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2929                    IEEE80211_PPE_THRES_NSS_POS));
2930
2931         /*
2932          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2933          * total size.
2934          */
2935         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2936         n = DIV_ROUND_UP(n, 8);
2937
2938         /* Copy PPE Thresholds */
2939         memcpy(pos, &he_cap->ppe_thres, n);
2940         pos += n;
2941
2942 end:
2943         orig_pos[1] = (pos - orig_pos) - 2;
2944         return pos;
2945 }
2946
2947 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2948                                     struct sk_buff *skb)
2949 {
2950         struct ieee80211_supported_band *sband;
2951         const struct ieee80211_sband_iftype_data *iftd;
2952         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2953         u8 *pos;
2954         u16 cap;
2955
2956         sband = ieee80211_get_sband(sdata);
2957         if (!sband)
2958                 return;
2959
2960         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2961         if (WARN_ON(!iftd))
2962                 return;
2963
2964         /* Check for device HE 6 GHz capability before adding element */
2965         if (!iftd->he_6ghz_capa.capa)
2966                 return;
2967
2968         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2969         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2970
2971         switch (sdata->smps_mode) {
2972         case IEEE80211_SMPS_AUTOMATIC:
2973         case IEEE80211_SMPS_NUM_MODES:
2974                 WARN_ON(1);
2975                 fallthrough;
2976         case IEEE80211_SMPS_OFF:
2977                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2978                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2979                 break;
2980         case IEEE80211_SMPS_STATIC:
2981                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2982                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2983                 break;
2984         case IEEE80211_SMPS_DYNAMIC:
2985                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2986                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2987                 break;
2988         }
2989
2990         pos = skb_put(skb, 2 + 1 + sizeof(cap));
2991         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
2992                                     pos + 2 + 1 + sizeof(cap));
2993 }
2994
2995 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2996                                const struct cfg80211_chan_def *chandef,
2997                                u16 prot_mode, bool rifs_mode)
2998 {
2999         struct ieee80211_ht_operation *ht_oper;
3000         /* Build HT Information */
3001         *pos++ = WLAN_EID_HT_OPERATION;
3002         *pos++ = sizeof(struct ieee80211_ht_operation);
3003         ht_oper = (struct ieee80211_ht_operation *)pos;
3004         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3005                                         chandef->chan->center_freq);
3006         switch (chandef->width) {
3007         case NL80211_CHAN_WIDTH_160:
3008         case NL80211_CHAN_WIDTH_80P80:
3009         case NL80211_CHAN_WIDTH_80:
3010         case NL80211_CHAN_WIDTH_40:
3011                 if (chandef->center_freq1 > chandef->chan->center_freq)
3012                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3013                 else
3014                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3015                 break;
3016         default:
3017                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3018                 break;
3019         }
3020         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3021             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3022             chandef->width != NL80211_CHAN_WIDTH_20)
3023                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3024
3025         if (rifs_mode)
3026                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3027
3028         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3029         ht_oper->stbc_param = 0x0000;
3030
3031         /* It seems that Basic MCS set and Supported MCS set
3032            are identical for the first 10 bytes */
3033         memset(&ht_oper->basic_set, 0, 16);
3034         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3035
3036         return pos + sizeof(struct ieee80211_ht_operation);
3037 }
3038
3039 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3040                                    const struct cfg80211_chan_def *chandef)
3041 {
3042         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3043         *pos++ = 3;                                     /* IE length */
3044         /* New channel width */
3045         switch (chandef->width) {
3046         case NL80211_CHAN_WIDTH_80:
3047                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3048                 break;
3049         case NL80211_CHAN_WIDTH_160:
3050                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3051                 break;
3052         case NL80211_CHAN_WIDTH_80P80:
3053                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3054                 break;
3055         default:
3056                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3057         }
3058
3059         /* new center frequency segment 0 */
3060         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3061         /* new center frequency segment 1 */
3062         if (chandef->center_freq2)
3063                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3064         else
3065                 *pos++ = 0;
3066 }
3067
3068 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3069                                 const struct cfg80211_chan_def *chandef)
3070 {
3071         struct ieee80211_vht_operation *vht_oper;
3072
3073         *pos++ = WLAN_EID_VHT_OPERATION;
3074         *pos++ = sizeof(struct ieee80211_vht_operation);
3075         vht_oper = (struct ieee80211_vht_operation *)pos;
3076         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3077                                                         chandef->center_freq1);
3078         if (chandef->center_freq2)
3079                 vht_oper->center_freq_seg1_idx =
3080                         ieee80211_frequency_to_channel(chandef->center_freq2);
3081         else
3082                 vht_oper->center_freq_seg1_idx = 0x00;
3083
3084         switch (chandef->width) {
3085         case NL80211_CHAN_WIDTH_160:
3086                 /*
3087                  * Convert 160 MHz channel width to new style as interop
3088                  * workaround.
3089                  */
3090                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3091                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3092                 if (chandef->chan->center_freq < chandef->center_freq1)
3093                         vht_oper->center_freq_seg0_idx -= 8;
3094                 else
3095                         vht_oper->center_freq_seg0_idx += 8;
3096                 break;
3097         case NL80211_CHAN_WIDTH_80P80:
3098                 /*
3099                  * Convert 80+80 MHz channel width to new style as interop
3100                  * workaround.
3101                  */
3102                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3103                 break;
3104         case NL80211_CHAN_WIDTH_80:
3105                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3106                 break;
3107         default:
3108                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3109                 break;
3110         }
3111
3112         /* don't require special VHT peer rates */
3113         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3114
3115         return pos + sizeof(struct ieee80211_vht_operation);
3116 }
3117
3118 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3119 {
3120         struct ieee80211_he_operation *he_oper;
3121         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3122         u32 he_oper_params;
3123         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3124
3125         if (chandef->chan->band == NL80211_BAND_6GHZ)
3126                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3127
3128         *pos++ = WLAN_EID_EXTENSION;
3129         *pos++ = ie_len;
3130         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3131
3132         he_oper_params = 0;
3133         he_oper_params |= u32_encode_bits(1023, /* disabled */
3134                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3135         he_oper_params |= u32_encode_bits(1,
3136                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3137         he_oper_params |= u32_encode_bits(1,
3138                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3139         if (chandef->chan->band == NL80211_BAND_6GHZ)
3140                 he_oper_params |= u32_encode_bits(1,
3141                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3142
3143         he_oper = (struct ieee80211_he_operation *)pos;
3144         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3145
3146         /* don't require special HE peer rates */
3147         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3148         pos += sizeof(struct ieee80211_he_operation);
3149
3150         if (chandef->chan->band != NL80211_BAND_6GHZ)
3151                 goto out;
3152
3153         /* TODO add VHT operational */
3154         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3155         he_6ghz_op->minrate = 6; /* 6 Mbps */
3156         he_6ghz_op->primary =
3157                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3158         he_6ghz_op->ccfs0 =
3159                 ieee80211_frequency_to_channel(chandef->center_freq1);
3160         if (chandef->center_freq2)
3161                 he_6ghz_op->ccfs1 =
3162                         ieee80211_frequency_to_channel(chandef->center_freq2);
3163         else
3164                 he_6ghz_op->ccfs1 = 0;
3165
3166         switch (chandef->width) {
3167         case NL80211_CHAN_WIDTH_160:
3168                 /* Convert 160 MHz channel width to new style as interop
3169                  * workaround.
3170                  */
3171                 he_6ghz_op->control =
3172                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3173                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3174                 if (chandef->chan->center_freq < chandef->center_freq1)
3175                         he_6ghz_op->ccfs0 -= 8;
3176                 else
3177                         he_6ghz_op->ccfs0 += 8;
3178                 fallthrough;
3179         case NL80211_CHAN_WIDTH_80P80:
3180                 he_6ghz_op->control =
3181                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3182                 break;
3183         case NL80211_CHAN_WIDTH_80:
3184                 he_6ghz_op->control =
3185                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3186                 break;
3187         case NL80211_CHAN_WIDTH_40:
3188                 he_6ghz_op->control =
3189                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3190                 break;
3191         default:
3192                 he_6ghz_op->control =
3193                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3194                 break;
3195         }
3196
3197         pos += sizeof(struct ieee80211_he_6ghz_oper);
3198
3199 out:
3200         return pos;
3201 }
3202
3203 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3204                                struct cfg80211_chan_def *chandef)
3205 {
3206         enum nl80211_channel_type channel_type;
3207
3208         if (!ht_oper)
3209                 return false;
3210
3211         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3212         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3213                 channel_type = NL80211_CHAN_HT20;
3214                 break;
3215         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3216                 channel_type = NL80211_CHAN_HT40PLUS;
3217                 break;
3218         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3219                 channel_type = NL80211_CHAN_HT40MINUS;
3220                 break;
3221         default:
3222                 channel_type = NL80211_CHAN_NO_HT;
3223                 return false;
3224         }
3225
3226         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3227         return true;
3228 }
3229
3230 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3231                                 const struct ieee80211_vht_operation *oper,
3232                                 const struct ieee80211_ht_operation *htop,
3233                                 struct cfg80211_chan_def *chandef)
3234 {
3235         struct cfg80211_chan_def new = *chandef;
3236         int cf0, cf1;
3237         int ccfs0, ccfs1, ccfs2;
3238         int ccf0, ccf1;
3239         u32 vht_cap;
3240         bool support_80_80 = false;
3241         bool support_160 = false;
3242         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3243                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3244         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3245                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3246
3247         if (!oper || !htop)
3248                 return false;
3249
3250         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3251         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3252                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3253         support_80_80 = ((vht_cap &
3254                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3255                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3256                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3257                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3258                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3259         ccfs0 = oper->center_freq_seg0_idx;
3260         ccfs1 = oper->center_freq_seg1_idx;
3261         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3262                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3263                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3264
3265         ccf0 = ccfs0;
3266
3267         /* if not supported, parse as though we didn't understand it */
3268         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3269                 ext_nss_bw_supp = 0;
3270
3271         /*
3272          * Cf. IEEE 802.11 Table 9-250
3273          *
3274          * We really just consider that because it's inefficient to connect
3275          * at a higher bandwidth than we'll actually be able to use.
3276          */
3277         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3278         default:
3279         case 0x00:
3280                 ccf1 = 0;
3281                 support_160 = false;
3282                 support_80_80 = false;
3283                 break;
3284         case 0x01:
3285                 support_80_80 = false;
3286                 fallthrough;
3287         case 0x02:
3288         case 0x03:
3289                 ccf1 = ccfs2;
3290                 break;
3291         case 0x10:
3292                 ccf1 = ccfs1;
3293                 break;
3294         case 0x11:
3295         case 0x12:
3296                 if (!ccfs1)
3297                         ccf1 = ccfs2;
3298                 else
3299                         ccf1 = ccfs1;
3300                 break;
3301         case 0x13:
3302         case 0x20:
3303         case 0x23:
3304                 ccf1 = ccfs1;
3305                 break;
3306         }
3307
3308         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3309         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3310
3311         switch (oper->chan_width) {
3312         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3313                 /* just use HT information directly */
3314                 break;
3315         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3316                 new.width = NL80211_CHAN_WIDTH_80;
3317                 new.center_freq1 = cf0;
3318                 /* If needed, adjust based on the newer interop workaround. */
3319                 if (ccf1) {
3320                         unsigned int diff;
3321
3322                         diff = abs(ccf1 - ccf0);
3323                         if ((diff == 8) && support_160) {
3324                                 new.width = NL80211_CHAN_WIDTH_160;
3325                                 new.center_freq1 = cf1;
3326                         } else if ((diff > 8) && support_80_80) {
3327                                 new.width = NL80211_CHAN_WIDTH_80P80;
3328                                 new.center_freq2 = cf1;
3329                         }
3330                 }
3331                 break;
3332         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3333                 /* deprecated encoding */
3334                 new.width = NL80211_CHAN_WIDTH_160;
3335                 new.center_freq1 = cf0;
3336                 break;
3337         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3338                 /* deprecated encoding */
3339                 new.width = NL80211_CHAN_WIDTH_80P80;
3340                 new.center_freq1 = cf0;
3341                 new.center_freq2 = cf1;
3342                 break;
3343         default:
3344                 return false;
3345         }
3346
3347         if (!cfg80211_chandef_valid(&new))
3348                 return false;
3349
3350         *chandef = new;
3351         return true;
3352 }
3353
3354 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3355                                     const struct ieee80211_he_operation *he_oper,
3356                                     struct cfg80211_chan_def *chandef)
3357 {
3358         struct ieee80211_local *local = sdata->local;
3359         struct ieee80211_supported_band *sband;
3360         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3361         const struct ieee80211_sta_he_cap *he_cap;
3362         struct cfg80211_chan_def he_chandef = *chandef;
3363         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3364         bool support_80_80, support_160;
3365         u8 he_phy_cap;
3366         u32 freq;
3367
3368         if (chandef->chan->band != NL80211_BAND_6GHZ)
3369                 return true;
3370
3371         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3372
3373         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3374         if (!he_cap) {
3375                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3376                 return false;
3377         }
3378
3379         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3380         support_160 =
3381                 he_phy_cap &
3382                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3383         support_80_80 =
3384                 he_phy_cap &
3385                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3386
3387         if (!he_oper) {
3388                 sdata_info(sdata,
3389                            "HE is not advertised on (on %d MHz), expect issues\n",
3390                            chandef->chan->center_freq);
3391                 return false;
3392         }
3393
3394         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3395
3396         if (!he_6ghz_oper) {
3397                 sdata_info(sdata,
3398                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3399                            chandef->chan->center_freq);
3400                 return false;
3401         }
3402
3403         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3404                                               NL80211_BAND_6GHZ);
3405         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3406
3407         switch (u8_get_bits(he_6ghz_oper->control,
3408                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3409         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3410                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3411                 break;
3412         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3413                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3414                 break;
3415         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3416                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3417                 break;
3418         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3419                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3420                 if (!he_6ghz_oper->ccfs1)
3421                         break;
3422                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3423                         if (support_160)
3424                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3425                 } else {
3426                         if (support_80_80)
3427                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3428                 }
3429                 break;
3430         }
3431
3432         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3433                 he_chandef.center_freq1 =
3434                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3435                                                        NL80211_BAND_6GHZ);
3436         } else {
3437                 he_chandef.center_freq1 =
3438                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3439                                                        NL80211_BAND_6GHZ);
3440                 if (support_80_80 || support_160)
3441                         he_chandef.center_freq2 =
3442                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3443                                                                NL80211_BAND_6GHZ);
3444         }
3445
3446         if (!cfg80211_chandef_valid(&he_chandef)) {
3447                 sdata_info(sdata,
3448                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3449                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3450                            he_chandef.width,
3451                            he_chandef.center_freq1,
3452                            he_chandef.center_freq2);
3453                 return false;
3454         }
3455
3456         *chandef = he_chandef;
3457
3458         return false;
3459 }
3460
3461 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3462                                 struct cfg80211_chan_def *chandef)
3463 {
3464         u32 oper_freq;
3465
3466         if (!oper)
3467                 return false;
3468
3469         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3470         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3471                 chandef->width = NL80211_CHAN_WIDTH_1;
3472                 break;
3473         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3474                 chandef->width = NL80211_CHAN_WIDTH_2;
3475                 break;
3476         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3477                 chandef->width = NL80211_CHAN_WIDTH_4;
3478                 break;
3479         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3480                 chandef->width = NL80211_CHAN_WIDTH_8;
3481                 break;
3482         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3483                 chandef->width = NL80211_CHAN_WIDTH_16;
3484                 break;
3485         default:
3486                 return false;
3487         }
3488
3489         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3490                                                   NL80211_BAND_S1GHZ);
3491         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3492         chandef->freq1_offset = oper_freq % 1000;
3493
3494         return true;
3495 }
3496
3497 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3498                              const struct ieee80211_supported_band *sband,
3499                              const u8 *srates, int srates_len, u32 *rates)
3500 {
3501         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3502         int shift = ieee80211_chandef_get_shift(chandef);
3503         struct ieee80211_rate *br;
3504         int brate, rate, i, j, count = 0;
3505
3506         *rates = 0;
3507
3508         for (i = 0; i < srates_len; i++) {
3509                 rate = srates[i] & 0x7f;
3510
3511                 for (j = 0; j < sband->n_bitrates; j++) {
3512                         br = &sband->bitrates[j];
3513                         if ((rate_flags & br->flags) != rate_flags)
3514                                 continue;
3515
3516                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3517                         if (brate == rate) {
3518                                 *rates |= BIT(j);
3519                                 count++;
3520                                 break;
3521                         }
3522                 }
3523         }
3524         return count;
3525 }
3526
3527 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3528                             struct sk_buff *skb, bool need_basic,
3529                             enum nl80211_band band)
3530 {
3531         struct ieee80211_local *local = sdata->local;
3532         struct ieee80211_supported_band *sband;
3533         int rate, shift;
3534         u8 i, rates, *pos;
3535         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3536         u32 rate_flags;
3537
3538         shift = ieee80211_vif_get_shift(&sdata->vif);
3539         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3540         sband = local->hw.wiphy->bands[band];
3541         rates = 0;
3542         for (i = 0; i < sband->n_bitrates; i++) {
3543                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3544                         continue;
3545                 rates++;
3546         }
3547         if (rates > 8)
3548                 rates = 8;
3549
3550         if (skb_tailroom(skb) < rates + 2)
3551                 return -ENOMEM;
3552
3553         pos = skb_put(skb, rates + 2);
3554         *pos++ = WLAN_EID_SUPP_RATES;
3555         *pos++ = rates;
3556         for (i = 0; i < rates; i++) {
3557                 u8 basic = 0;
3558                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3559                         continue;
3560
3561                 if (need_basic && basic_rates & BIT(i))
3562                         basic = 0x80;
3563                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3564                                     5 * (1 << shift));
3565                 *pos++ = basic | (u8) rate;
3566         }
3567
3568         return 0;
3569 }
3570
3571 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3572                                 struct sk_buff *skb, bool need_basic,
3573                                 enum nl80211_band band)
3574 {
3575         struct ieee80211_local *local = sdata->local;
3576         struct ieee80211_supported_band *sband;
3577         int rate, shift;
3578         u8 i, exrates, *pos;
3579         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3580         u32 rate_flags;
3581
3582         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3583         shift = ieee80211_vif_get_shift(&sdata->vif);
3584
3585         sband = local->hw.wiphy->bands[band];
3586         exrates = 0;
3587         for (i = 0; i < sband->n_bitrates; i++) {
3588                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3589                         continue;
3590                 exrates++;
3591         }
3592
3593         if (exrates > 8)
3594                 exrates -= 8;
3595         else
3596                 exrates = 0;
3597
3598         if (skb_tailroom(skb) < exrates + 2)
3599                 return -ENOMEM;
3600
3601         if (exrates) {
3602                 pos = skb_put(skb, exrates + 2);
3603                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3604                 *pos++ = exrates;
3605                 for (i = 8; i < sband->n_bitrates; i++) {
3606                         u8 basic = 0;
3607                         if ((rate_flags & sband->bitrates[i].flags)
3608                             != rate_flags)
3609                                 continue;
3610                         if (need_basic && basic_rates & BIT(i))
3611                                 basic = 0x80;
3612                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3613                                             5 * (1 << shift));
3614                         *pos++ = basic | (u8) rate;
3615                 }
3616         }
3617         return 0;
3618 }
3619
3620 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3621 {
3622         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3623         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3624
3625         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3626                 /* non-managed type inferfaces */
3627                 return 0;
3628         }
3629         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3630 }
3631 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3632
3633 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3634 {
3635         if (!mcs)
3636                 return 1;
3637
3638         /* TODO: consider rx_highest */
3639
3640         if (mcs->rx_mask[3])
3641                 return 4;
3642         if (mcs->rx_mask[2])
3643                 return 3;
3644         if (mcs->rx_mask[1])
3645                 return 2;
3646         return 1;
3647 }
3648
3649 /**
3650  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3651  * @local: mac80211 hw info struct
3652  * @status: RX status
3653  * @mpdu_len: total MPDU length (including FCS)
3654  * @mpdu_offset: offset into MPDU to calculate timestamp at
3655  *
3656  * This function calculates the RX timestamp at the given MPDU offset, taking
3657  * into account what the RX timestamp was. An offset of 0 will just normalize
3658  * the timestamp to TSF at beginning of MPDU reception.
3659  */
3660 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3661                                      struct ieee80211_rx_status *status,
3662                                      unsigned int mpdu_len,
3663                                      unsigned int mpdu_offset)
3664 {
3665         u64 ts = status->mactime;
3666         struct rate_info ri;
3667         u16 rate;
3668
3669         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3670                 return 0;
3671
3672         memset(&ri, 0, sizeof(ri));
3673
3674         ri.bw = status->bw;
3675
3676         /* Fill cfg80211 rate info */
3677         switch (status->encoding) {
3678         case RX_ENC_HT:
3679                 ri.mcs = status->rate_idx;
3680                 ri.flags |= RATE_INFO_FLAGS_MCS;
3681                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3682                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3683                 break;
3684         case RX_ENC_VHT:
3685                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3686                 ri.mcs = status->rate_idx;
3687                 ri.nss = status->nss;
3688                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3689                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3690                 break;
3691         default:
3692                 WARN_ON(1);
3693                 fallthrough;
3694         case RX_ENC_LEGACY: {
3695                 struct ieee80211_supported_band *sband;
3696                 int shift = 0;
3697                 int bitrate;
3698
3699                 switch (status->bw) {
3700                 case RATE_INFO_BW_10:
3701                         shift = 1;
3702                         break;
3703                 case RATE_INFO_BW_5:
3704                         shift = 2;
3705                         break;
3706                 }
3707
3708                 sband = local->hw.wiphy->bands[status->band];
3709                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3710                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3711
3712                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3713                         /* TODO: handle HT/VHT preambles */
3714                         if (status->band == NL80211_BAND_5GHZ) {
3715                                 ts += 20 << shift;
3716                                 mpdu_offset += 2;
3717                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3718                                 ts += 96;
3719                         } else {
3720                                 ts += 192;
3721                         }
3722                 }
3723                 break;
3724                 }
3725         }
3726
3727         rate = cfg80211_calculate_bitrate(&ri);
3728         if (WARN_ONCE(!rate,
3729                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3730                       (unsigned long long)status->flag, status->rate_idx,
3731                       status->nss))
3732                 return 0;
3733
3734         /* rewind from end of MPDU */
3735         if (status->flag & RX_FLAG_MACTIME_END)
3736                 ts -= mpdu_len * 8 * 10 / rate;
3737
3738         ts += mpdu_offset * 8 * 10 / rate;
3739
3740         return ts;
3741 }
3742
3743 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3744 {
3745         struct ieee80211_sub_if_data *sdata;
3746         struct cfg80211_chan_def chandef;
3747
3748         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3749         ASSERT_RTNL();
3750
3751         mutex_lock(&local->mtx);
3752         list_for_each_entry(sdata, &local->interfaces, list) {
3753                 /* it might be waiting for the local->mtx, but then
3754                  * by the time it gets it, sdata->wdev.cac_started
3755                  * will no longer be true
3756                  */
3757                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3758
3759                 if (sdata->wdev.cac_started) {
3760                         chandef = sdata->vif.bss_conf.chandef;
3761                         ieee80211_vif_release_channel(sdata);
3762                         cfg80211_cac_event(sdata->dev,
3763                                            &chandef,
3764                                            NL80211_RADAR_CAC_ABORTED,
3765                                            GFP_KERNEL);
3766                 }
3767         }
3768         mutex_unlock(&local->mtx);
3769 }
3770
3771 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3772 {
3773         struct ieee80211_local *local =
3774                 container_of(work, struct ieee80211_local, radar_detected_work);
3775         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3776         struct ieee80211_chanctx *ctx;
3777         int num_chanctx = 0;
3778
3779         mutex_lock(&local->chanctx_mtx);
3780         list_for_each_entry(ctx, &local->chanctx_list, list) {
3781                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3782                         continue;
3783
3784                 num_chanctx++;
3785                 chandef = ctx->conf.def;
3786         }
3787         mutex_unlock(&local->chanctx_mtx);
3788
3789         rtnl_lock();
3790         ieee80211_dfs_cac_cancel(local);
3791         rtnl_unlock();
3792
3793         if (num_chanctx > 1)
3794                 /* XXX: multi-channel is not supported yet */
3795                 WARN_ON(1);
3796         else
3797                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3798 }
3799
3800 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3801 {
3802         struct ieee80211_local *local = hw_to_local(hw);
3803
3804         trace_api_radar_detected(local);
3805
3806         schedule_work(&local->radar_detected_work);
3807 }
3808 EXPORT_SYMBOL(ieee80211_radar_detected);
3809
3810 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3811 {
3812         u32 ret;
3813         int tmp;
3814
3815         switch (c->width) {
3816         case NL80211_CHAN_WIDTH_20:
3817                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3818                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3819                 break;
3820         case NL80211_CHAN_WIDTH_40:
3821                 c->width = NL80211_CHAN_WIDTH_20;
3822                 c->center_freq1 = c->chan->center_freq;
3823                 ret = IEEE80211_STA_DISABLE_40MHZ |
3824                       IEEE80211_STA_DISABLE_VHT;
3825                 break;
3826         case NL80211_CHAN_WIDTH_80:
3827                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3828                 /* n_P40 */
3829                 tmp /= 2;
3830                 /* freq_P40 */
3831                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3832                 c->width = NL80211_CHAN_WIDTH_40;
3833                 ret = IEEE80211_STA_DISABLE_VHT;
3834                 break;
3835         case NL80211_CHAN_WIDTH_80P80:
3836                 c->center_freq2 = 0;
3837                 c->width = NL80211_CHAN_WIDTH_80;
3838                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3839                       IEEE80211_STA_DISABLE_160MHZ;
3840                 break;
3841         case NL80211_CHAN_WIDTH_160:
3842                 /* n_P20 */
3843                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3844                 /* n_P80 */
3845                 tmp /= 4;
3846                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3847                 c->width = NL80211_CHAN_WIDTH_80;
3848                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3849                       IEEE80211_STA_DISABLE_160MHZ;
3850                 break;
3851         default:
3852         case NL80211_CHAN_WIDTH_20_NOHT:
3853                 WARN_ON_ONCE(1);
3854                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3855                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3856                 break;
3857         case NL80211_CHAN_WIDTH_1:
3858         case NL80211_CHAN_WIDTH_2:
3859         case NL80211_CHAN_WIDTH_4:
3860         case NL80211_CHAN_WIDTH_8:
3861         case NL80211_CHAN_WIDTH_16:
3862         case NL80211_CHAN_WIDTH_5:
3863         case NL80211_CHAN_WIDTH_10:
3864                 WARN_ON_ONCE(1);
3865                 /* keep c->width */
3866                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3867                 break;
3868         }
3869
3870         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3871
3872         return ret;
3873 }
3874
3875 /*
3876  * Returns true if smps_mode_new is strictly more restrictive than
3877  * smps_mode_old.
3878  */
3879 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3880                                    enum ieee80211_smps_mode smps_mode_new)
3881 {
3882         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3883                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3884                 return false;
3885
3886         switch (smps_mode_old) {
3887         case IEEE80211_SMPS_STATIC:
3888                 return false;
3889         case IEEE80211_SMPS_DYNAMIC:
3890                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3891         case IEEE80211_SMPS_OFF:
3892                 return smps_mode_new != IEEE80211_SMPS_OFF;
3893         default:
3894                 WARN_ON(1);
3895         }
3896
3897         return false;
3898 }
3899
3900 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3901                               struct cfg80211_csa_settings *csa_settings)
3902 {
3903         struct sk_buff *skb;
3904         struct ieee80211_mgmt *mgmt;
3905         struct ieee80211_local *local = sdata->local;
3906         int freq;
3907         int hdr_len = offsetofend(struct ieee80211_mgmt,
3908                                   u.action.u.chan_switch);
3909         u8 *pos;
3910
3911         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3912             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3913                 return -EOPNOTSUPP;
3914
3915         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3916                             5 + /* channel switch announcement element */
3917                             3 + /* secondary channel offset element */
3918                             5 + /* wide bandwidth channel switch announcement */
3919                             8); /* mesh channel switch parameters element */
3920         if (!skb)
3921                 return -ENOMEM;
3922
3923         skb_reserve(skb, local->tx_headroom);
3924         mgmt = skb_put_zero(skb, hdr_len);
3925         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3926                                           IEEE80211_STYPE_ACTION);
3927
3928         eth_broadcast_addr(mgmt->da);
3929         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3930         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3931                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3932         } else {
3933                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3934                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3935         }
3936         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3937         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3938         pos = skb_put(skb, 5);
3939         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3940         *pos++ = 3;                                             /* IE length */
3941         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3942         freq = csa_settings->chandef.chan->center_freq;
3943         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3944         *pos++ = csa_settings->count;                           /* count */
3945
3946         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3947                 enum nl80211_channel_type ch_type;
3948
3949                 skb_put(skb, 3);
3950                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3951                 *pos++ = 1;                                     /* IE length */
3952                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3953                 if (ch_type == NL80211_CHAN_HT40PLUS)
3954                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3955                 else
3956                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3957         }
3958
3959         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3960                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3961
3962                 skb_put(skb, 8);
3963                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3964                 *pos++ = 6;                                     /* IE length */
3965                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3966                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3967                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3968                 *pos++ |= csa_settings->block_tx ?
3969                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3970                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3971                 pos += 2;
3972                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3973                 pos += 2;
3974         }
3975
3976         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3977             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3978             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3979                 skb_put(skb, 5);
3980                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3981         }
3982
3983         ieee80211_tx_skb(sdata, skb);
3984         return 0;
3985 }
3986
3987 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3988 {
3989         return !(cs == NULL || cs->cipher == 0 ||
3990                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3991                  cs->hdr_len <= cs->key_idx_off ||
3992                  cs->key_idx_shift > 7 ||
3993                  cs->key_idx_mask == 0);
3994 }
3995
3996 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3997 {
3998         int i;
3999
4000         /* Ensure we have enough iftype bitmap space for all iftype values */
4001         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4002
4003         for (i = 0; i < n; i++)
4004                 if (!ieee80211_cs_valid(&cs[i]))
4005                         return false;
4006
4007         return true;
4008 }
4009
4010 const struct ieee80211_cipher_scheme *
4011 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4012                  enum nl80211_iftype iftype)
4013 {
4014         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4015         int n = local->hw.n_cipher_schemes;
4016         int i;
4017         const struct ieee80211_cipher_scheme *cs = NULL;
4018
4019         for (i = 0; i < n; i++) {
4020                 if (l[i].cipher == cipher) {
4021                         cs = &l[i];
4022                         break;
4023                 }
4024         }
4025
4026         if (!cs || !(cs->iftype & BIT(iftype)))
4027                 return NULL;
4028
4029         return cs;
4030 }
4031
4032 int ieee80211_cs_headroom(struct ieee80211_local *local,
4033                           struct cfg80211_crypto_settings *crypto,
4034                           enum nl80211_iftype iftype)
4035 {
4036         const struct ieee80211_cipher_scheme *cs;
4037         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4038         int i;
4039
4040         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4041                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4042                                       iftype);
4043
4044                 if (cs && headroom < cs->hdr_len)
4045                         headroom = cs->hdr_len;
4046         }
4047
4048         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4049         if (cs && headroom < cs->hdr_len)
4050                 headroom = cs->hdr_len;
4051
4052         return headroom;
4053 }
4054
4055 static bool
4056 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4057 {
4058         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4059         int skip;
4060
4061         if (end > 0)
4062                 return false;
4063
4064         /* One shot NOA  */
4065         if (data->count[i] == 1)
4066                 return false;
4067
4068         if (data->desc[i].interval == 0)
4069                 return false;
4070
4071         /* End time is in the past, check for repetitions */
4072         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4073         if (data->count[i] < 255) {
4074                 if (data->count[i] <= skip) {
4075                         data->count[i] = 0;
4076                         return false;
4077                 }
4078
4079                 data->count[i] -= skip;
4080         }
4081
4082         data->desc[i].start += skip * data->desc[i].interval;
4083
4084         return true;
4085 }
4086
4087 static bool
4088 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4089                              s32 *offset)
4090 {
4091         bool ret = false;
4092         int i;
4093
4094         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4095                 s32 cur;
4096
4097                 if (!data->count[i])
4098                         continue;
4099
4100                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4101                         ret = true;
4102
4103                 cur = data->desc[i].start - tsf;
4104                 if (cur > *offset)
4105                         continue;
4106
4107                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4108                 if (cur > *offset)
4109                         *offset = cur;
4110         }
4111
4112         return ret;
4113 }
4114
4115 static u32
4116 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4117 {
4118         s32 offset = 0;
4119         int tries = 0;
4120         /*
4121          * arbitrary limit, used to avoid infinite loops when combined NoA
4122          * descriptors cover the full time period.
4123          */
4124         int max_tries = 5;
4125
4126         ieee80211_extend_absent_time(data, tsf, &offset);
4127         do {
4128                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4129                         break;
4130
4131                 tries++;
4132         } while (tries < max_tries);
4133
4134         return offset;
4135 }
4136
4137 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4138 {
4139         u32 next_offset = BIT(31) - 1;
4140         int i;
4141
4142         data->absent = 0;
4143         data->has_next_tsf = false;
4144         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4145                 s32 start;
4146
4147                 if (!data->count[i])
4148                         continue;
4149
4150                 ieee80211_extend_noa_desc(data, tsf, i);
4151                 start = data->desc[i].start - tsf;
4152                 if (start <= 0)
4153                         data->absent |= BIT(i);
4154
4155                 if (next_offset > start)
4156                         next_offset = start;
4157
4158                 data->has_next_tsf = true;
4159         }
4160
4161         if (data->absent)
4162                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4163
4164         data->next_tsf = tsf + next_offset;
4165 }
4166 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4167
4168 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4169                             struct ieee80211_noa_data *data, u32 tsf)
4170 {
4171         int ret = 0;
4172         int i;
4173
4174         memset(data, 0, sizeof(*data));
4175
4176         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4177                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4178
4179                 if (!desc->count || !desc->duration)
4180                         continue;
4181
4182                 data->count[i] = desc->count;
4183                 data->desc[i].start = le32_to_cpu(desc->start_time);
4184                 data->desc[i].duration = le32_to_cpu(desc->duration);
4185                 data->desc[i].interval = le32_to_cpu(desc->interval);
4186
4187                 if (data->count[i] > 1 &&
4188                     data->desc[i].interval < data->desc[i].duration)
4189                         continue;
4190
4191                 ieee80211_extend_noa_desc(data, tsf, i);
4192                 ret++;
4193         }
4194
4195         if (ret)
4196                 ieee80211_update_p2p_noa(data, tsf);
4197
4198         return ret;
4199 }
4200 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4201
4202 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4203                            struct ieee80211_sub_if_data *sdata)
4204 {
4205         u64 tsf = drv_get_tsf(local, sdata);
4206         u64 dtim_count = 0;
4207         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4208         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4209         struct ps_data *ps;
4210         u8 bcns_from_dtim;
4211
4212         if (tsf == -1ULL || !beacon_int || !dtim_period)
4213                 return;
4214
4215         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4216             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4217                 if (!sdata->bss)
4218                         return;
4219
4220                 ps = &sdata->bss->ps;
4221         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4222                 ps = &sdata->u.mesh.ps;
4223         } else {
4224                 return;
4225         }
4226
4227         /*
4228          * actually finds last dtim_count, mac80211 will update in
4229          * __beacon_add_tim().
4230          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4231          */
4232         do_div(tsf, beacon_int);
4233         bcns_from_dtim = do_div(tsf, dtim_period);
4234         /* just had a DTIM */
4235         if (!bcns_from_dtim)
4236                 dtim_count = 0;
4237         else
4238                 dtim_count = dtim_period - bcns_from_dtim;
4239
4240         ps->dtim_count = dtim_count;
4241 }
4242
4243 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4244                                          struct ieee80211_chanctx *ctx)
4245 {
4246         struct ieee80211_sub_if_data *sdata;
4247         u8 radar_detect = 0;
4248
4249         lockdep_assert_held(&local->chanctx_mtx);
4250
4251         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4252                 return 0;
4253
4254         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4255                 if (sdata->reserved_radar_required)
4256                         radar_detect |= BIT(sdata->reserved_chandef.width);
4257
4258         /*
4259          * An in-place reservation context should not have any assigned vifs
4260          * until it replaces the other context.
4261          */
4262         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4263                 !list_empty(&ctx->assigned_vifs));
4264
4265         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4266                 if (sdata->radar_required)
4267                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4268
4269         return radar_detect;
4270 }
4271
4272 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4273                                  const struct cfg80211_chan_def *chandef,
4274                                  enum ieee80211_chanctx_mode chanmode,
4275                                  u8 radar_detect)
4276 {
4277         struct ieee80211_local *local = sdata->local;
4278         struct ieee80211_sub_if_data *sdata_iter;
4279         enum nl80211_iftype iftype = sdata->wdev.iftype;
4280         struct ieee80211_chanctx *ctx;
4281         int total = 1;
4282         struct iface_combination_params params = {
4283                 .radar_detect = radar_detect,
4284         };
4285
4286         lockdep_assert_held(&local->chanctx_mtx);
4287
4288         if (WARN_ON(hweight32(radar_detect) > 1))
4289                 return -EINVAL;
4290
4291         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4292                     !chandef->chan))
4293                 return -EINVAL;
4294
4295         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4296                 return -EINVAL;
4297
4298         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4299             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4300                 /*
4301                  * always passing this is harmless, since it'll be the
4302                  * same value that cfg80211 finds if it finds the same
4303                  * interface ... and that's always allowed
4304                  */
4305                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4306         }
4307
4308         /* Always allow software iftypes */
4309         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4310                 if (radar_detect)
4311                         return -EINVAL;
4312                 return 0;
4313         }
4314
4315         if (chandef)
4316                 params.num_different_channels = 1;
4317
4318         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4319                 params.iftype_num[iftype] = 1;
4320
4321         list_for_each_entry(ctx, &local->chanctx_list, list) {
4322                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4323                         continue;
4324                 params.radar_detect |=
4325                         ieee80211_chanctx_radar_detect(local, ctx);
4326                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4327                         params.num_different_channels++;
4328                         continue;
4329                 }
4330                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4331                     cfg80211_chandef_compatible(chandef,
4332                                                 &ctx->conf.def))
4333                         continue;
4334                 params.num_different_channels++;
4335         }
4336
4337         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4338                 struct wireless_dev *wdev_iter;
4339
4340                 wdev_iter = &sdata_iter->wdev;
4341
4342                 if (sdata_iter == sdata ||
4343                     !ieee80211_sdata_running(sdata_iter) ||
4344                     cfg80211_iftype_allowed(local->hw.wiphy,
4345                                             wdev_iter->iftype, 0, 1))
4346                         continue;
4347
4348                 params.iftype_num[wdev_iter->iftype]++;
4349                 total++;
4350         }
4351
4352         if (total == 1 && !params.radar_detect)
4353                 return 0;
4354
4355         return cfg80211_check_combinations(local->hw.wiphy, &params);
4356 }
4357
4358 static void
4359 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4360                          void *data)
4361 {
4362         u32 *max_num_different_channels = data;
4363
4364         *max_num_different_channels = max(*max_num_different_channels,
4365                                           c->num_different_channels);
4366 }
4367
4368 int ieee80211_max_num_channels(struct ieee80211_local *local)
4369 {
4370         struct ieee80211_sub_if_data *sdata;
4371         struct ieee80211_chanctx *ctx;
4372         u32 max_num_different_channels = 1;
4373         int err;
4374         struct iface_combination_params params = {0};
4375
4376         lockdep_assert_held(&local->chanctx_mtx);
4377
4378         list_for_each_entry(ctx, &local->chanctx_list, list) {
4379                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4380                         continue;
4381
4382                 params.num_different_channels++;
4383
4384                 params.radar_detect |=
4385                         ieee80211_chanctx_radar_detect(local, ctx);
4386         }
4387
4388         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4389                 params.iftype_num[sdata->wdev.iftype]++;
4390
4391         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4392                                          ieee80211_iter_max_chans,
4393                                          &max_num_different_channels);
4394         if (err < 0)
4395                 return err;
4396
4397         return max_num_different_channels;
4398 }
4399
4400 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4401                                 struct ieee80211_sta_s1g_cap *caps,
4402                                 struct sk_buff *skb)
4403 {
4404         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4405         struct ieee80211_s1g_cap s1g_capab;
4406         u8 *pos;
4407         int i;
4408
4409         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4410                 return;
4411
4412         if (!caps->s1g)
4413                 return;
4414
4415         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4416         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4417
4418         /* override the capability info */
4419         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4420                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4421
4422                 s1g_capab.capab_info[i] &= ~mask;
4423                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4424         }
4425
4426         /* then MCS and NSS set */
4427         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4428                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4429
4430                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4431                 s1g_capab.supp_mcs_nss[i] |=
4432                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4433         }
4434
4435         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4436         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4437         *pos++ = sizeof(s1g_capab);
4438
4439         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4440 }
4441
4442 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4443                                   struct sk_buff *skb)
4444 {
4445         u8 *pos = skb_put(skb, 3);
4446
4447         *pos++ = WLAN_EID_AID_REQUEST;
4448         *pos++ = 1;
4449         *pos++ = 0;
4450 }
4451
4452 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4453 {
4454         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4455         *buf++ = 7; /* len */
4456         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4457         *buf++ = 0x50;
4458         *buf++ = 0xf2;
4459         *buf++ = 2; /* WME */
4460         *buf++ = 0; /* WME info */
4461         *buf++ = 1; /* WME ver */
4462         *buf++ = qosinfo; /* U-APSD no in use */
4463
4464         return buf;
4465 }
4466
4467 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4468                              unsigned long *frame_cnt,
4469                              unsigned long *byte_cnt)
4470 {
4471         struct txq_info *txqi = to_txq_info(txq);
4472         u32 frag_cnt = 0, frag_bytes = 0;
4473         struct sk_buff *skb;
4474
4475         skb_queue_walk(&txqi->frags, skb) {
4476                 frag_cnt++;
4477                 frag_bytes += skb->len;
4478         }
4479
4480         if (frame_cnt)
4481                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4482
4483         if (byte_cnt)
4484                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4485 }
4486 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4487
4488 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4489         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4490         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4491         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4492         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4493 };
4494
4495 u16 ieee80211_encode_usf(int listen_interval)
4496 {
4497         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4498         u16 ui, usf = 0;
4499
4500         /* find greatest USF */
4501         while (usf < IEEE80211_MAX_USF) {
4502                 if (listen_interval % listen_int_usf[usf + 1])
4503                         break;
4504                 usf += 1;
4505         }
4506         ui = listen_interval / listen_int_usf[usf];
4507
4508         /* error if there is a remainder. Should've been checked by user */
4509         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4510         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4511                           FIELD_PREP(LISTEN_INT_UI, ui);
4512
4513         return (u16) listen_interval;
4514 }