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;
 954
 955         if (!elem->datalen)
 956                 return;
 957
 958         len = elem->datalen - 1;
 959
 960         switch (elem->data[0]) {
 961         case WLAN_EID_EXT_HE_MU_EDCA:
 962                 if (len >= sizeof(*elems->mu_edca_param_set)) {
 963                         elems->mu_edca_param_set = data;
 964                         if (crc)
 965                                 *crc = crc32_be(*crc, (void *)elem,
 966                                                 elem->datalen + 2);
 967                 }
 968                 break;
 969         case WLAN_EID_EXT_HE_CAPABILITY:
 970                 elems->he_cap = data;
 971                 elems->he_cap_len = len;
 972                 break;
 973         case WLAN_EID_EXT_HE_OPERATION:
 974                 if (len >= sizeof(*elems->he_operation) &&
 975                     len >= ieee80211_he_oper_size(data) - 1) {
 976                         if (crc)
 977                                 *crc = crc32_be(*crc, (void *)elem,
 978                                                 elem->datalen + 2);
 979                         elems->he_operation = data;
 980                 }
 981                 break;
 982         case WLAN_EID_EXT_UORA:
 983                 if (len >= 1)
 984                         elems->uora_element = data;
 985                 break;
 986         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 987                 if (len == 3)
 988                         elems->max_channel_switch_time = data;
 989                 break;
 990         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 991                 if (len >= sizeof(*elems->mbssid_config_ie))
 992                         elems->mbssid_config_ie = data;
 993                 break;
 994         case WLAN_EID_EXT_HE_SPR:
 995                 if (len >= sizeof(*elems->he_spr) &&
 996                     len >= ieee80211_he_spr_size(data))
 997                         elems->he_spr = data;
 998                 break;
 999         case WLAN_EID_EXT_HE_6GHZ_CAPA:
1000                 if (len >= sizeof(*elems->he_6ghz_capa))
1001                         elems->he_6ghz_capa = data;
1002                 break;
1003         }
1004 }
1005
1006 static u32
1007 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1008                             struct ieee802_11_elems *elems,
1009                             u64 filter, u32 crc,
1010                             const struct element *check_inherit)
1011 {
1012         const struct element *elem;
1013         bool calc_crc = filter != 0;
1014         DECLARE_BITMAP(seen_elems, 256);
1015         const u8 *ie;
1016
1017         bitmap_zero(seen_elems, 256);
1018
1019         for_each_element(elem, start, len) {
1020                 bool elem_parse_failed;
1021                 u8 id = elem->id;
1022                 u8 elen = elem->datalen;
1023                 const u8 *pos = elem->data;
1024
1025                 if (check_inherit &&
1026                     !cfg80211_is_element_inherited(elem,
1027                                                    check_inherit))
1028                         continue;
1029
1030                 switch (id) {
1031                 case WLAN_EID_SSID:
1032                 case WLAN_EID_SUPP_RATES:
1033                 case WLAN_EID_FH_PARAMS:
1034                 case WLAN_EID_DS_PARAMS:
1035                 case WLAN_EID_CF_PARAMS:
1036                 case WLAN_EID_TIM:
1037                 case WLAN_EID_IBSS_PARAMS:
1038                 case WLAN_EID_CHALLENGE:
1039                 case WLAN_EID_RSN:
1040                 case WLAN_EID_ERP_INFO:
1041                 case WLAN_EID_EXT_SUPP_RATES:
1042                 case WLAN_EID_HT_CAPABILITY:
1043                 case WLAN_EID_HT_OPERATION:
1044                 case WLAN_EID_VHT_CAPABILITY:
1045                 case WLAN_EID_VHT_OPERATION:
1046                 case WLAN_EID_MESH_ID:
1047                 case WLAN_EID_MESH_CONFIG:
1048                 case WLAN_EID_PEER_MGMT:
1049                 case WLAN_EID_PREQ:
1050                 case WLAN_EID_PREP:
1051                 case WLAN_EID_PERR:
1052                 case WLAN_EID_RANN:
1053                 case WLAN_EID_CHANNEL_SWITCH:
1054                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1055                 case WLAN_EID_COUNTRY:
1056                 case WLAN_EID_PWR_CONSTRAINT:
1057                 case WLAN_EID_TIMEOUT_INTERVAL:
1058                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1059                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1060                 case WLAN_EID_CHAN_SWITCH_PARAM:
1061                 case WLAN_EID_EXT_CAPABILITY:
1062                 case WLAN_EID_CHAN_SWITCH_TIMING:
1063                 case WLAN_EID_LINK_ID:
1064                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1065                 case WLAN_EID_RSNX:
1066                 case WLAN_EID_S1G_BCN_COMPAT:
1067                 case WLAN_EID_S1G_CAPABILITIES:
1068                 case WLAN_EID_S1G_OPERATION:
1069                 case WLAN_EID_AID_RESPONSE:
1070                 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1071                 /*
1072                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1073                  * that if the content gets bigger it might be needed more than once
1074                  */
1075                         if (test_bit(id, seen_elems)) {
1076                                 elems->parse_error = true;
1077                                 continue;
1078                         }
1079                         break;
1080                 }
1081
1082                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1083                         crc = crc32_be(crc, pos - 2, elen + 2);
1084
1085                 elem_parse_failed = false;
1086
1087                 switch (id) {
1088                 case WLAN_EID_LINK_ID:
1089                         if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
1090                                 elem_parse_failed = true;
1091                                 break;
1092                         }
1093                         elems->lnk_id = (void *)(pos - 2);
1094                         break;
1095                 case WLAN_EID_CHAN_SWITCH_TIMING:
1096                         if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
1097                                 elem_parse_failed = true;
1098                                 break;
1099                         }
1100                         elems->ch_sw_timing = (void *)pos;
1101                         break;
1102                 case WLAN_EID_EXT_CAPABILITY:
1103                         elems->ext_capab = pos;
1104                         elems->ext_capab_len = elen;
1105                         break;
1106                 case WLAN_EID_SSID:
1107                         elems->ssid = pos;
1108                         elems->ssid_len = elen;
1109                         break;
1110                 case WLAN_EID_SUPP_RATES:
1111                         elems->supp_rates = pos;
1112                         elems->supp_rates_len = elen;
1113                         break;
1114                 case WLAN_EID_DS_PARAMS:
1115                         if (elen >= 1)
1116                                 elems->ds_params = pos;
1117                         else
1118                                 elem_parse_failed = true;
1119                         break;
1120                 case WLAN_EID_TIM:
1121                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1122                                 elems->tim = (void *)pos;
1123                                 elems->tim_len = elen;
1124                         } else
1125                                 elem_parse_failed = true;
1126                         break;
1127                 case WLAN_EID_VENDOR_SPECIFIC:
1128                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1129                             pos[2] == 0xf2) {
1130                                 /* Microsoft OUI (00:50:F2) */
1131
1132                                 if (calc_crc)
1133                                         crc = crc32_be(crc, pos - 2, elen + 2);
1134
1135                                 if (elen >= 5 && pos[3] == 2) {
1136                                         /* OUI Type 2 - WMM IE */
1137                                         if (pos[4] == 0) {
1138                                                 elems->wmm_info = pos;
1139                                                 elems->wmm_info_len = elen;
1140                                         } else if (pos[4] == 1) {
1141                                                 elems->wmm_param = pos;
1142                                                 elems->wmm_param_len = elen;
1143                                         }
1144                                 }
1145                         }
1146                         break;
1147                 case WLAN_EID_RSN:
1148                         elems->rsn = pos;
1149                         elems->rsn_len = elen;
1150                         break;
1151                 case WLAN_EID_ERP_INFO:
1152                         if (elen >= 1)
1153                                 elems->erp_info = pos;
1154                         else
1155                                 elem_parse_failed = true;
1156                         break;
1157                 case WLAN_EID_EXT_SUPP_RATES:
1158                         elems->ext_supp_rates = pos;
1159                         elems->ext_supp_rates_len = elen;
1160                         break;
1161                 case WLAN_EID_HT_CAPABILITY:
1162                         if (elen >= sizeof(struct ieee80211_ht_cap))
1163                                 elems->ht_cap_elem = (void *)pos;
1164                         else
1165                                 elem_parse_failed = true;
1166                         break;
1167                 case WLAN_EID_HT_OPERATION:
1168                         if (elen >= sizeof(struct ieee80211_ht_operation))
1169                                 elems->ht_operation = (void *)pos;
1170                         else
1171                                 elem_parse_failed = true;
1172                         break;
1173                 case WLAN_EID_VHT_CAPABILITY:
1174                         if (elen >= sizeof(struct ieee80211_vht_cap))
1175                                 elems->vht_cap_elem = (void *)pos;
1176                         else
1177                                 elem_parse_failed = true;
1178                         break;
1179                 case WLAN_EID_VHT_OPERATION:
1180                         if (elen >= sizeof(struct ieee80211_vht_operation)) {
1181                                 elems->vht_operation = (void *)pos;
1182                                 if (calc_crc)
1183                                         crc = crc32_be(crc, pos - 2, elen + 2);
1184                                 break;
1185                         }
1186                         elem_parse_failed = true;
1187                         break;
1188                 case WLAN_EID_OPMODE_NOTIF:
1189                         if (elen > 0) {
1190                                 elems->opmode_notif = pos;
1191                                 if (calc_crc)
1192                                         crc = crc32_be(crc, pos - 2, elen + 2);
1193                                 break;
1194                         }
1195                         elem_parse_failed = true;
1196                         break;
1197                 case WLAN_EID_MESH_ID:
1198                         elems->mesh_id = pos;
1199                         elems->mesh_id_len = elen;
1200                         break;
1201                 case WLAN_EID_MESH_CONFIG:
1202                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1203                                 elems->mesh_config = (void *)pos;
1204                         else
1205                                 elem_parse_failed = true;
1206                         break;
1207                 case WLAN_EID_PEER_MGMT:
1208                         elems->peering = pos;
1209                         elems->peering_len = elen;
1210                         break;
1211                 case WLAN_EID_MESH_AWAKE_WINDOW:
1212                         if (elen >= 2)
1213                                 elems->awake_window = (void *)pos;
1214                         break;
1215                 case WLAN_EID_PREQ:
1216                         elems->preq = pos;
1217                         elems->preq_len = elen;
1218                         break;
1219                 case WLAN_EID_PREP:
1220                         elems->prep = pos;
1221                         elems->prep_len = elen;
1222                         break;
1223                 case WLAN_EID_PERR:
1224                         elems->perr = pos;
1225                         elems->perr_len = elen;
1226                         break;
1227                 case WLAN_EID_RANN:
1228                         if (elen >= sizeof(struct ieee80211_rann_ie))
1229                                 elems->rann = (void *)pos;
1230                         else
1231                                 elem_parse_failed = true;
1232                         break;
1233                 case WLAN_EID_CHANNEL_SWITCH:
1234                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1235                                 elem_parse_failed = true;
1236                                 break;
1237                         }
1238                         elems->ch_switch_ie = (void *)pos;
1239                         break;
1240                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1241                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1242                                 elem_parse_failed = true;
1243                                 break;
1244                         }
1245                         elems->ext_chansw_ie = (void *)pos;
1246                         break;
1247                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1248                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1249                                 elem_parse_failed = true;
1250                                 break;
1251                         }
1252                         elems->sec_chan_offs = (void *)pos;
1253                         break;
1254                 case WLAN_EID_CHAN_SWITCH_PARAM:
1255                         if (elen <
1256                             sizeof(*elems->mesh_chansw_params_ie)) {
1257                                 elem_parse_failed = true;
1258                                 break;
1259                         }
1260                         elems->mesh_chansw_params_ie = (void *)pos;
1261                         break;
1262                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1263                         if (!action ||
1264                             elen < sizeof(*elems->wide_bw_chansw_ie)) {
1265                                 elem_parse_failed = true;
1266                                 break;
1267                         }
1268                         elems->wide_bw_chansw_ie = (void *)pos;
1269                         break;
1270                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1271                         if (action) {
1272                                 elem_parse_failed = true;
1273                                 break;
1274                         }
1275                         /*
1276                          * This is a bit tricky, but as we only care about
1277                          * the wide bandwidth channel switch element, so
1278                          * just parse it out manually.
1279                          */
1280                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1281                                               pos, elen);
1282                         if (ie) {
1283                                 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie))
1284                                         elems->wide_bw_chansw_ie =
1285                                                 (void *)(ie + 2);
1286                                 else
1287                                         elem_parse_failed = true;
1288                         }
1289                         break;
1290                 case WLAN_EID_COUNTRY:
1291                         elems->country_elem = pos;
1292                         elems->country_elem_len = elen;
1293                         break;
1294                 case WLAN_EID_PWR_CONSTRAINT:
1295                         if (elen != 1) {
1296                                 elem_parse_failed = true;
1297                                 break;
1298                         }
1299                         elems->pwr_constr_elem = pos;
1300                         break;
1301                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1302                         /* Lots of different options exist, but we only care
1303                          * about the Dynamic Transmit Power Control element.
1304                          * First check for the Cisco OUI, then for the DTPC
1305                          * tag (0x00).
1306                          */
1307                         if (elen < 4) {
1308                                 elem_parse_failed = true;
1309                                 break;
1310                         }
1311
1312                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1313                             pos[2] != 0x96 || pos[3] != 0x00)
1314                                 break;
1315
1316                         if (elen != 6) {
1317                                 elem_parse_failed = true;
1318                                 break;
1319                         }
1320
1321                         if (calc_crc)
1322                                 crc = crc32_be(crc, pos - 2, elen + 2);
1323
1324                         elems->cisco_dtpc_elem = pos;
1325                         break;
1326                 case WLAN_EID_ADDBA_EXT:
1327                         if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
1328                                 elem_parse_failed = true;
1329                                 break;
1330                         }
1331                         elems->addba_ext_ie = (void *)pos;
1332                         break;
1333                 case WLAN_EID_TIMEOUT_INTERVAL:
1334                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1335                                 elems->timeout_int = (void *)pos;
1336                         else
1337                                 elem_parse_failed = true;
1338                         break;
1339                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1340                         if (elen >= sizeof(*elems->max_idle_period_ie))
1341                                 elems->max_idle_period_ie = (void *)pos;
1342                         break;
1343                 case WLAN_EID_RSNX:
1344                         elems->rsnx = pos;
1345                         elems->rsnx_len = elen;
1346                         break;
1347                 case WLAN_EID_EXTENSION:
1348                         ieee80211_parse_extension_element(calc_crc ?
1349                                                                 &crc : NULL,
1350                                                           elem, elems);
1351                         break;
1352                 case WLAN_EID_S1G_CAPABILITIES:
1353                         if (elen >= sizeof(*elems->s1g_capab))
1354                                 elems->s1g_capab = (void *)pos;
1355                         else
1356                                 elem_parse_failed = true;
1357                         break;
1358                 case WLAN_EID_S1G_OPERATION:
1359                         if (elen == sizeof(*elems->s1g_oper))
1360                                 elems->s1g_oper = (void *)pos;
1361                         else
1362                                 elem_parse_failed = true;
1363                         break;
1364                 case WLAN_EID_S1G_BCN_COMPAT:
1365                         if (elen == sizeof(*elems->s1g_bcn_compat))
1366                                 elems->s1g_bcn_compat = (void *)pos;
1367                         else
1368                                 elem_parse_failed = true;
1369                         break;
1370                 case WLAN_EID_AID_RESPONSE:
1371                         if (elen == sizeof(struct ieee80211_aid_response_ie))
1372                                 elems->aid_resp = (void *)pos;
1373                         else
1374                                 elem_parse_failed = true;
1375                         break;
1376                 default:
1377                         break;
1378                 }
1379
1380                 if (elem_parse_failed)
1381                         elems->parse_error = true;
1382                 else
1383                         __set_bit(id, seen_elems);
1384         }
1385
1386         if (!for_each_element_completed(elem, start, len))
1387                 elems->parse_error = true;
1388
1389         return crc;
1390 }
1391
1392 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1393                                             struct ieee802_11_elems *elems,
1394                                             u8 *transmitter_bssid,
1395                                             u8 *bss_bssid,
1396                                             u8 *nontransmitted_profile)
1397 {
1398         const struct element *elem, *sub;
1399         size_t profile_len = 0;
1400         bool found = false;
1401
1402         if (!bss_bssid || !transmitter_bssid)
1403                 return profile_len;
1404
1405         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1406                 if (elem->datalen < 2)
1407                         continue;
1408                 if (elem->data[0] < 1 || elem->data[0] > 8)
1409                         continue;
1410
1411                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1412                         u8 new_bssid[ETH_ALEN];
1413                         const u8 *index;
1414
1415                         if (sub->id != 0 || sub->datalen < 4) {
1416                                 /* not a valid BSS profile */
1417                                 continue;
1418                         }
1419
1420                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1421                             sub->data[1] != 2) {
1422                                 /* The first element of the
1423                                  * Nontransmitted BSSID Profile is not
1424                                  * the Nontransmitted BSSID Capability
1425                                  * element.
1426                                  */
1427                                 continue;
1428                         }
1429
1430                         memset(nontransmitted_profile, 0, len);
1431                         profile_len = cfg80211_merge_profile(start, len,
1432                                                              elem,
1433                                                              sub,
1434                                                              nontransmitted_profile,
1435                                                              len);
1436
1437                         /* found a Nontransmitted BSSID Profile */
1438                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1439                                                  nontransmitted_profile,
1440                                                  profile_len);
1441                         if (!index || index[1] < 1 || index[2] == 0) {
1442                                 /* Invalid MBSSID Index element */
1443                                 continue;
1444                         }
1445
1446                         cfg80211_gen_new_bssid(transmitter_bssid,
1447                                                elem->data[0],
1448                                                index[2],
1449                                                new_bssid);
1450                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1451                                 found = true;
1452                                 elems->bssid_index_len = index[1];
1453                                 elems->bssid_index = (void *)&index[2];
1454                                 break;
1455                         }
1456                 }
1457         }
1458
1459         return found ? profile_len : 0;
1460 }
1461
1462 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1463                                struct ieee802_11_elems *elems,
1464                                u64 filter, u32 crc, u8 *transmitter_bssid,
1465                                u8 *bss_bssid)
1466 {
1467         const struct element *non_inherit = NULL;
1468         u8 *nontransmitted_profile;
1469         int nontransmitted_profile_len = 0;
1470
1471         memset(elems, 0, sizeof(*elems));
1472         elems->ie_start = start;
1473         elems->total_len = len;
1474
1475         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1476         if (nontransmitted_profile) {
1477                 nontransmitted_profile_len =
1478                         ieee802_11_find_bssid_profile(start, len, elems,
1479                                                       transmitter_bssid,
1480                                                       bss_bssid,
1481                                                       nontransmitted_profile);
1482                 non_inherit =
1483                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1484                                                nontransmitted_profile,
1485                                                nontransmitted_profile_len);
1486                 if (!nontransmitted_profile_len) {
1487                         nontransmitted_profile_len = 0;
1488                         kfree(nontransmitted_profile);
1489                         nontransmitted_profile = NULL;
1490                 }
1491         }
1492
1493         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1494                                           crc, non_inherit);
1495
1496         /* Override with nontransmitted profile, if found */
1497         if (nontransmitted_profile_len)
1498                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1499                                             nontransmitted_profile_len,
1500                                             action, elems, 0, 0, NULL);
1501
1502         if (elems->tim && !elems->parse_error) {
1503                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1504
1505                 elems->dtim_period = tim_ie->dtim_period;
1506                 elems->dtim_count = tim_ie->dtim_count;
1507         }
1508
1509         /* Override DTIM period and count if needed */
1510         if (elems->bssid_index &&
1511             elems->bssid_index_len >=
1512             offsetofend(struct ieee80211_bssid_index, dtim_period))
1513                 elems->dtim_period = elems->bssid_index->dtim_period;
1514
1515         if (elems->bssid_index &&
1516             elems->bssid_index_len >=
1517             offsetofend(struct ieee80211_bssid_index, dtim_count))
1518                 elems->dtim_count = elems->bssid_index->dtim_count;
1519
1520         elems->nontx_profile = nontransmitted_profile;
1521
1522         return crc;
1523 }
1524
1525 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1526                                            struct ieee80211_tx_queue_params
1527                                            *qparam, int ac)
1528 {
1529         struct ieee80211_chanctx_conf *chanctx_conf;
1530         const struct ieee80211_reg_rule *rrule;
1531         const struct ieee80211_wmm_ac *wmm_ac;
1532         u16 center_freq = 0;
1533
1534         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1535             sdata->vif.type != NL80211_IFTYPE_STATION)
1536                 return;
1537
1538         rcu_read_lock();
1539         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1540         if (chanctx_conf)
1541                 center_freq = chanctx_conf->def.chan->center_freq;
1542
1543         if (!center_freq) {
1544                 rcu_read_unlock();
1545                 return;
1546         }
1547
1548         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1549
1550         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1551                 rcu_read_unlock();
1552                 return;
1553         }
1554
1555         if (sdata->vif.type == NL80211_IFTYPE_AP)
1556                 wmm_ac = &rrule->wmm_rule.ap[ac];
1557         else
1558                 wmm_ac = &rrule->wmm_rule.client[ac];
1559         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1560         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1561         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1562         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1563         rcu_read_unlock();
1564 }
1565
1566 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1567                                bool bss_notify, bool enable_qos)
1568 {
1569         struct ieee80211_local *local = sdata->local;
1570         struct ieee80211_tx_queue_params qparam;
1571         struct ieee80211_chanctx_conf *chanctx_conf;
1572         int ac;
1573         bool use_11b;
1574         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1575         int aCWmin, aCWmax;
1576
1577         if (!local->ops->conf_tx)
1578                 return;
1579
1580         if (local->hw.queues < IEEE80211_NUM_ACS)
1581                 return;
1582
1583         memset(&qparam, 0, sizeof(qparam));
1584
1585         rcu_read_lock();
1586         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1587         use_11b = (chanctx_conf &&
1588                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1589                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1590         rcu_read_unlock();
1591
1592         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1593
1594         /* Set defaults according to 802.11-2007 Table 7-37 */
1595         aCWmax = 1023;
1596         if (use_11b)
1597                 aCWmin = 31;
1598         else
1599                 aCWmin = 15;
1600
1601         /* Confiure old 802.11b/g medium access rules. */
1602         qparam.cw_max = aCWmax;
1603         qparam.cw_min = aCWmin;
1604         qparam.txop = 0;
1605         qparam.aifs = 2;
1606
1607         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1608                 /* Update if QoS is enabled. */
1609                 if (enable_qos) {
1610                         switch (ac) {
1611                         case IEEE80211_AC_BK:
1612                                 qparam.cw_max = aCWmax;
1613                                 qparam.cw_min = aCWmin;
1614                                 qparam.txop = 0;
1615                                 if (is_ocb)
1616                                         qparam.aifs = 9;
1617                                 else
1618                                         qparam.aifs = 7;
1619                                 break;
1620                         /* never happens but let's not leave undefined */
1621                         default:
1622                         case IEEE80211_AC_BE:
1623                                 qparam.cw_max = aCWmax;
1624                                 qparam.cw_min = aCWmin;
1625                                 qparam.txop = 0;
1626                                 if (is_ocb)
1627                                         qparam.aifs = 6;
1628                                 else
1629                                         qparam.aifs = 3;
1630                                 break;
1631                         case IEEE80211_AC_VI:
1632                                 qparam.cw_max = aCWmin;
1633                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1634                                 if (is_ocb)
1635                                         qparam.txop = 0;
1636                                 else if (use_11b)
1637                                         qparam.txop = 6016/32;
1638                                 else
1639                                         qparam.txop = 3008/32;
1640
1641                                 if (is_ocb)
1642                                         qparam.aifs = 3;
1643                                 else
1644                                         qparam.aifs = 2;
1645                                 break;
1646                         case IEEE80211_AC_VO:
1647                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1648                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1649                                 if (is_ocb)
1650                                         qparam.txop = 0;
1651                                 else if (use_11b)
1652                                         qparam.txop = 3264/32;
1653                                 else
1654                                         qparam.txop = 1504/32;
1655                                 qparam.aifs = 2;
1656                                 break;
1657                         }
1658                 }
1659                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1660
1661                 qparam.uapsd = false;
1662
1663                 sdata->tx_conf[ac] = qparam;
1664                 drv_conf_tx(local, sdata, ac, &qparam);
1665         }
1666
1667         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1668             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1669             sdata->vif.type != NL80211_IFTYPE_NAN) {
1670                 sdata->vif.bss_conf.qos = enable_qos;
1671                 if (bss_notify)
1672                         ieee80211_bss_info_change_notify(sdata,
1673                                                          BSS_CHANGED_QOS);
1674         }
1675 }
1676
1677 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1678                          u16 transaction, u16 auth_alg, u16 status,
1679                          const u8 *extra, size_t extra_len, const u8 *da,
1680                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1681                          u32 tx_flags)
1682 {
1683         struct ieee80211_local *local = sdata->local;
1684         struct sk_buff *skb;
1685         struct ieee80211_mgmt *mgmt;
1686         int err;
1687
1688         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1689         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1690                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1691         if (!skb)
1692                 return;
1693
1694         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1695
1696         mgmt = skb_put_zero(skb, 24 + 6);
1697         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1698                                           IEEE80211_STYPE_AUTH);
1699         memcpy(mgmt->da, da, ETH_ALEN);
1700         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1701         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1702         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1703         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1704         mgmt->u.auth.status_code = cpu_to_le16(status);
1705         if (extra)
1706                 skb_put_data(skb, extra, extra_len);
1707
1708         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1709                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1710                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1711                 WARN_ON(err);
1712         }
1713
1714         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1715                                         tx_flags;
1716         ieee80211_tx_skb(sdata, skb);
1717 }
1718
1719 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1720                                     const u8 *da, const u8 *bssid,
1721                                     u16 stype, u16 reason,
1722                                     bool send_frame, u8 *frame_buf)
1723 {
1724         struct ieee80211_local *local = sdata->local;
1725         struct sk_buff *skb;
1726         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1727
1728         /* build frame */
1729         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1730         mgmt->duration = 0; /* initialize only */
1731         mgmt->seq_ctrl = 0; /* initialize only */
1732         memcpy(mgmt->da, da, ETH_ALEN);
1733         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1734         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1735         /* u.deauth.reason_code == u.disassoc.reason_code */
1736         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1737
1738         if (send_frame) {
1739                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1740                                     IEEE80211_DEAUTH_FRAME_LEN);
1741                 if (!skb)
1742                         return;
1743
1744                 skb_reserve(skb, local->hw.extra_tx_headroom);
1745
1746                 /* copy in frame */
1747                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1748
1749                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1750                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1751                         IEEE80211_SKB_CB(skb)->flags |=
1752                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1753
1754                 ieee80211_tx_skb(sdata, skb);
1755         }
1756 }
1757
1758 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1759 {
1760         if ((end - pos) < 5)
1761                 return pos;
1762
1763         *pos++ = WLAN_EID_EXTENSION;
1764         *pos++ = 1 + sizeof(cap);
1765         *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1766         memcpy(pos, &cap, sizeof(cap));
1767
1768         return pos + 2;
1769 }
1770
1771 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1772                                          u8 *buffer, size_t buffer_len,
1773                                          const u8 *ie, size_t ie_len,
1774                                          enum nl80211_band band,
1775                                          u32 rate_mask,
1776                                          struct cfg80211_chan_def *chandef,
1777                                          size_t *offset, u32 flags)
1778 {
1779         struct ieee80211_local *local = sdata->local;
1780         struct ieee80211_supported_band *sband;
1781         const struct ieee80211_sta_he_cap *he_cap;
1782         u8 *pos = buffer, *end = buffer + buffer_len;
1783         size_t noffset;
1784         int supp_rates_len, i;
1785         u8 rates[32];
1786         int num_rates;
1787         int ext_rates_len;
1788         int shift;
1789         u32 rate_flags;
1790         bool have_80mhz = false;
1791
1792         *offset = 0;
1793
1794         sband = local->hw.wiphy->bands[band];
1795         if (WARN_ON_ONCE(!sband))
1796                 return 0;
1797
1798         rate_flags = ieee80211_chandef_rate_flags(chandef);
1799         shift = ieee80211_chandef_get_shift(chandef);
1800
1801         num_rates = 0;
1802         for (i = 0; i < sband->n_bitrates; i++) {
1803                 if ((BIT(i) & rate_mask) == 0)
1804                         continue; /* skip rate */
1805                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1806                         continue;
1807
1808                 rates[num_rates++] =
1809                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1810                                           (1 << shift) * 5);
1811         }
1812
1813         supp_rates_len = min_t(int, num_rates, 8);
1814
1815         if (end - pos < 2 + supp_rates_len)
1816                 goto out_err;
1817         *pos++ = WLAN_EID_SUPP_RATES;
1818         *pos++ = supp_rates_len;
1819         memcpy(pos, rates, supp_rates_len);
1820         pos += supp_rates_len;
1821
1822         /* insert "request information" if in custom IEs */
1823         if (ie && ie_len) {
1824                 static const u8 before_extrates[] = {
1825                         WLAN_EID_SSID,
1826                         WLAN_EID_SUPP_RATES,
1827                         WLAN_EID_REQUEST,
1828                 };
1829                 noffset = ieee80211_ie_split(ie, ie_len,
1830                                              before_extrates,
1831                                              ARRAY_SIZE(before_extrates),
1832                                              *offset);
1833                 if (end - pos < noffset - *offset)
1834                         goto out_err;
1835                 memcpy(pos, ie + *offset, noffset - *offset);
1836                 pos += noffset - *offset;
1837                 *offset = noffset;
1838         }
1839
1840         ext_rates_len = num_rates - supp_rates_len;
1841         if (ext_rates_len > 0) {
1842                 if (end - pos < 2 + ext_rates_len)
1843                         goto out_err;
1844                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1845                 *pos++ = ext_rates_len;
1846                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1847                 pos += ext_rates_len;
1848         }
1849
1850         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1851                 if (end - pos < 3)
1852                         goto out_err;
1853                 *pos++ = WLAN_EID_DS_PARAMS;
1854                 *pos++ = 1;
1855                 *pos++ = ieee80211_frequency_to_channel(
1856                                 chandef->chan->center_freq);
1857         }
1858
1859         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1860                 goto done;
1861
1862         /* insert custom IEs that go before HT */
1863         if (ie && ie_len) {
1864                 static const u8 before_ht[] = {
1865                         /*
1866                          * no need to list the ones split off already
1867                          * (or generated here)
1868                          */
1869                         WLAN_EID_DS_PARAMS,
1870                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1871                 };
1872                 noffset = ieee80211_ie_split(ie, ie_len,
1873                                              before_ht, ARRAY_SIZE(before_ht),
1874                                              *offset);
1875                 if (end - pos < noffset - *offset)
1876                         goto out_err;
1877                 memcpy(pos, ie + *offset, noffset - *offset);
1878                 pos += noffset - *offset;
1879                 *offset = noffset;
1880         }
1881
1882         if (sband->ht_cap.ht_supported) {
1883                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1884                         goto out_err;
1885                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1886                                                 sband->ht_cap.cap);
1887         }
1888
1889         /* insert custom IEs that go before VHT */
1890         if (ie && ie_len) {
1891                 static const u8 before_vht[] = {
1892                         /*
1893                          * no need to list the ones split off already
1894                          * (or generated here)
1895                          */
1896                         WLAN_EID_BSS_COEX_2040,
1897                         WLAN_EID_EXT_CAPABILITY,
1898                         WLAN_EID_SSID_LIST,
1899                         WLAN_EID_CHANNEL_USAGE,
1900                         WLAN_EID_INTERWORKING,
1901                         WLAN_EID_MESH_ID,
1902                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1903                 };
1904                 noffset = ieee80211_ie_split(ie, ie_len,
1905                                              before_vht, ARRAY_SIZE(before_vht),
1906                                              *offset);
1907                 if (end - pos < noffset - *offset)
1908                         goto out_err;
1909                 memcpy(pos, ie + *offset, noffset - *offset);
1910                 pos += noffset - *offset;
1911                 *offset = noffset;
1912         }
1913
1914         /* Check if any channel in this sband supports at least 80 MHz */
1915         for (i = 0; i < sband->n_channels; i++) {
1916                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1917                                                 IEEE80211_CHAN_NO_80MHZ))
1918                         continue;
1919
1920                 have_80mhz = true;
1921                 break;
1922         }
1923
1924         if (sband->vht_cap.vht_supported && have_80mhz) {
1925                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1926                         goto out_err;
1927                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1928                                                  sband->vht_cap.cap);
1929         }
1930
1931         /* insert custom IEs that go before HE */
1932         if (ie && ie_len) {
1933                 static const u8 before_he[] = {
1934                         /*
1935                          * no need to list the ones split off before VHT
1936                          * or generated here
1937                          */
1938                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1939                         WLAN_EID_AP_CSN,
1940                         /* TODO: add 11ah/11aj/11ak elements */
1941                 };
1942                 noffset = ieee80211_ie_split(ie, ie_len,
1943                                              before_he, ARRAY_SIZE(before_he),
1944                                              *offset);
1945                 if (end - pos < noffset - *offset)
1946                         goto out_err;
1947                 memcpy(pos, ie + *offset, noffset - *offset);
1948                 pos += noffset - *offset;
1949                 *offset = noffset;
1950         }
1951
1952         he_cap = ieee80211_get_he_sta_cap(sband);
1953         if (he_cap) {
1954                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1955                 if (!pos)
1956                         goto out_err;
1957
1958                 if (sband->band == NL80211_BAND_6GHZ) {
1959                         enum nl80211_iftype iftype =
1960                                 ieee80211_vif_type_p2p(&sdata->vif);
1961                         __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1962
1963                         pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1964                 }
1965         }
1966
1967         /*
1968          * If adding more here, adjust code in main.c
1969          * that calculates local->scan_ies_len.
1970          */
1971
1972         return pos - buffer;
1973  out_err:
1974         WARN_ONCE(1, "not enough space for preq IEs\n");
1975  done:
1976         return pos - buffer;
1977 }
1978
1979 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1980                              size_t buffer_len,
1981                              struct ieee80211_scan_ies *ie_desc,
1982                              const u8 *ie, size_t ie_len,
1983                              u8 bands_used, u32 *rate_masks,
1984                              struct cfg80211_chan_def *chandef,
1985                              u32 flags)
1986 {
1987         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1988         int i;
1989
1990         memset(ie_desc, 0, sizeof(*ie_desc));
1991
1992         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1993                 if (bands_used & BIT(i)) {
1994                         pos += ieee80211_build_preq_ies_band(sdata,
1995                                                              buffer + pos,
1996                                                              buffer_len - pos,
1997                                                              ie, ie_len, i,
1998                                                              rate_masks[i],
1999                                                              chandef,
2000                                                              &custom_ie_offset,
2001                                                              flags);
2002                         ie_desc->ies[i] = buffer + old_pos;
2003                         ie_desc->len[i] = pos - old_pos;
2004                         old_pos = pos;
2005                 }
2006         }
2007
2008         /* add any remaining custom IEs */
2009         if (ie && ie_len) {
2010                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
2011                               "not enough space for preq custom IEs\n"))
2012                         return pos;
2013                 memcpy(buffer + pos, ie + custom_ie_offset,
2014                        ie_len - custom_ie_offset);
2015                 ie_desc->common_ies = buffer + pos;
2016                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2017                 pos += ie_len - custom_ie_offset;
2018         }
2019
2020         return pos;
2021 };
2022
2023 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2024                                           const u8 *src, const u8 *dst,
2025                                           u32 ratemask,
2026                                           struct ieee80211_channel *chan,
2027                                           const u8 *ssid, size_t ssid_len,
2028                                           const u8 *ie, size_t ie_len,
2029                                           u32 flags)
2030 {
2031         struct ieee80211_local *local = sdata->local;
2032         struct cfg80211_chan_def chandef;
2033         struct sk_buff *skb;
2034         struct ieee80211_mgmt *mgmt;
2035         int ies_len;
2036         u32 rate_masks[NUM_NL80211_BANDS] = {};
2037         struct ieee80211_scan_ies dummy_ie_desc;
2038
2039         /*
2040          * Do not send DS Channel parameter for directed probe requests
2041          * in order to maximize the chance that we get a response.  Some
2042          * badly-behaved APs don't respond when this parameter is included.
2043          */
2044         chandef.width = sdata->vif.bss_conf.chandef.width;
2045         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2046                 chandef.chan = NULL;
2047         else
2048                 chandef.chan = chan;
2049
2050         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2051                                      100 + ie_len);
2052         if (!skb)
2053                 return NULL;
2054
2055         rate_masks[chan->band] = ratemask;
2056         ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2057                                            skb_tailroom(skb), &dummy_ie_desc,
2058                                            ie, ie_len, BIT(chan->band),
2059                                            rate_masks, &chandef, flags);
2060         skb_put(skb, ies_len);
2061
2062         if (dst) {
2063                 mgmt = (struct ieee80211_mgmt *) skb->data;
2064                 memcpy(mgmt->da, dst, ETH_ALEN);
2065                 memcpy(mgmt->bssid, dst, ETH_ALEN);
2066         }
2067
2068         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2069
2070         return skb;
2071 }
2072
2073 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2074                             struct ieee802_11_elems *elems,
2075                             enum nl80211_band band, u32 *basic_rates)
2076 {
2077         struct ieee80211_supported_band *sband;
2078         size_t num_rates;
2079         u32 supp_rates, rate_flags;
2080         int i, j, shift;
2081
2082         sband = sdata->local->hw.wiphy->bands[band];
2083         if (WARN_ON(!sband))
2084                 return 1;
2085
2086         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2087         shift = ieee80211_vif_get_shift(&sdata->vif);
2088
2089         num_rates = sband->n_bitrates;
2090         supp_rates = 0;
2091         for (i = 0; i < elems->supp_rates_len +
2092                      elems->ext_supp_rates_len; i++) {
2093                 u8 rate = 0;
2094                 int own_rate;
2095                 bool is_basic;
2096                 if (i < elems->supp_rates_len)
2097                         rate = elems->supp_rates[i];
2098                 else if (elems->ext_supp_rates)
2099                         rate = elems->ext_supp_rates
2100                                 [i - elems->supp_rates_len];
2101                 own_rate = 5 * (rate & 0x7f);
2102                 is_basic = !!(rate & 0x80);
2103
2104                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2105                         continue;
2106
2107                 for (j = 0; j < num_rates; j++) {
2108                         int brate;
2109                         if ((rate_flags & sband->bitrates[j].flags)
2110                             != rate_flags)
2111                                 continue;
2112
2113                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2114                                              1 << shift);
2115
2116                         if (brate == own_rate) {
2117                                 supp_rates |= BIT(j);
2118                                 if (basic_rates && is_basic)
2119                                         *basic_rates |= BIT(j);
2120                         }
2121                 }
2122         }
2123         return supp_rates;
2124 }
2125
2126 void ieee80211_stop_device(struct ieee80211_local *local)
2127 {
2128         ieee80211_led_radio(local, false);
2129         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2130
2131         cancel_work_sync(&local->reconfig_filter);
2132
2133         flush_workqueue(local->workqueue);
2134         drv_stop(local);
2135 }
2136
2137 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2138                                            bool aborted)
2139 {
2140         /* It's possible that we don't handle the scan completion in
2141          * time during suspend, so if it's still marked as completed
2142          * here, queue the work and flush it to clean things up.
2143          * Instead of calling the worker function directly here, we
2144          * really queue it to avoid potential races with other flows
2145          * scheduling the same work.
2146          */
2147         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2148                 /* If coming from reconfiguration failure, abort the scan so
2149                  * we don't attempt to continue a partial HW scan - which is
2150                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2151                  * completed scan, and a 5 GHz portion is still pending.
2152                  */
2153                 if (aborted)
2154                         set_bit(SCAN_ABORTED, &local->scanning);
2155                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2156                 flush_delayed_work(&local->scan_work);
2157         }
2158 }
2159
2160 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2161 {
2162         struct ieee80211_sub_if_data *sdata;
2163         struct ieee80211_chanctx *ctx;
2164
2165         /*
2166          * We get here if during resume the device can't be restarted properly.
2167          * We might also get here if this happens during HW reset, which is a
2168          * slightly different situation and we need to drop all connections in
2169          * the latter case.
2170          *
2171          * Ask cfg80211 to turn off all interfaces, this will result in more
2172          * warnings but at least we'll then get into a clean stopped state.
2173          */
2174
2175         local->resuming = false;
2176         local->suspended = false;
2177         local->in_reconfig = false;
2178
2179         ieee80211_flush_completed_scan(local, true);
2180
2181         /* scheduled scan clearly can't be running any more, but tell
2182          * cfg80211 and clear local state
2183          */
2184         ieee80211_sched_scan_end(local);
2185
2186         list_for_each_entry(sdata, &local->interfaces, list)
2187                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2188
2189         /* Mark channel contexts as not being in the driver any more to avoid
2190          * removing them from the driver during the shutdown process...
2191          */
2192         mutex_lock(&local->chanctx_mtx);
2193         list_for_each_entry(ctx, &local->chanctx_list, list)
2194                 ctx->driver_present = false;
2195         mutex_unlock(&local->chanctx_mtx);
2196
2197         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2198 }
2199
2200 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2201                                      struct ieee80211_sub_if_data *sdata)
2202 {
2203         struct ieee80211_chanctx_conf *conf;
2204         struct ieee80211_chanctx *ctx;
2205
2206         if (!local->use_chanctx)
2207                 return;
2208
2209         mutex_lock(&local->chanctx_mtx);
2210         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2211                                          lockdep_is_held(&local->chanctx_mtx));
2212         if (conf) {
2213                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2214                 drv_assign_vif_chanctx(local, sdata, ctx);
2215         }
2216         mutex_unlock(&local->chanctx_mtx);
2217 }
2218
2219 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2220 {
2221         struct ieee80211_local *local = sdata->local;
2222         struct sta_info *sta;
2223
2224         /* add STAs back */
2225         mutex_lock(&local->sta_mtx);
2226         list_for_each_entry(sta, &local->sta_list, list) {
2227                 enum ieee80211_sta_state state;
2228
2229                 if (!sta->uploaded || sta->sdata != sdata)
2230                         continue;
2231
2232                 for (state = IEEE80211_STA_NOTEXIST;
2233                      state < sta->sta_state; state++)
2234                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2235                                               state + 1));
2236         }
2237         mutex_unlock(&local->sta_mtx);
2238 }
2239
2240 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2241 {
2242         struct cfg80211_nan_func *func, **funcs;
2243         int res, id, i = 0;
2244
2245         res = drv_start_nan(sdata->local, sdata,
2246                             &sdata->u.nan.conf);
2247         if (WARN_ON(res))
2248                 return res;
2249
2250         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2251                         sizeof(*funcs),
2252                         GFP_KERNEL);
2253         if (!funcs)
2254                 return -ENOMEM;
2255
2256         /* Add all the functions:
2257          * This is a little bit ugly. We need to call a potentially sleeping
2258          * callback for each NAN function, so we can't hold the spinlock.
2259          */
2260         spin_lock_bh(&sdata->u.nan.func_lock);
2261
2262         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2263                 funcs[i++] = func;
2264
2265         spin_unlock_bh(&sdata->u.nan.func_lock);
2266
2267         for (i = 0; funcs[i]; i++) {
2268                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2269                 if (WARN_ON(res))
2270                         ieee80211_nan_func_terminated(&sdata->vif,
2271                                                       funcs[i]->instance_id,
2272                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2273                                                       GFP_KERNEL);
2274         }
2275
2276         kfree(funcs);
2277
2278         return 0;
2279 }
2280
2281 int ieee80211_reconfig(struct ieee80211_local *local)
2282 {
2283         struct ieee80211_hw *hw = &local->hw;
2284         struct ieee80211_sub_if_data *sdata;
2285         struct ieee80211_chanctx *ctx;
2286         struct sta_info *sta;
2287         int res, i;
2288         bool reconfig_due_to_wowlan = false;
2289         struct ieee80211_sub_if_data *sched_scan_sdata;
2290         struct cfg80211_sched_scan_request *sched_scan_req;
2291         bool sched_scan_stopped = false;
2292         bool suspended = local->suspended;
2293
2294         /* nothing to do if HW shouldn't run */
2295         if (!local->open_count)
2296                 goto wake_up;
2297
2298 #ifdef CONFIG_PM
2299         if (suspended)
2300                 local->resuming = true;
2301
2302         if (local->wowlan) {
2303                 /*
2304                  * In the wowlan case, both mac80211 and the device
2305                  * are functional when the resume op is called, so
2306                  * clear local->suspended so the device could operate
2307                  * normally (e.g. pass rx frames).
2308                  */
2309                 local->suspended = false;
2310                 res = drv_resume(local);
2311                 local->wowlan = false;
2312                 if (res < 0) {
2313                         local->resuming = false;
2314                         return res;
2315                 }
2316                 if (res == 0)
2317                         goto wake_up;
2318                 WARN_ON(res > 1);
2319                 /*
2320                  * res is 1, which means the driver requested
2321                  * to go through a regular reset on wakeup.
2322                  * restore local->suspended in this case.
2323                  */
2324                 reconfig_due_to_wowlan = true;
2325                 local->suspended = true;
2326         }
2327 #endif
2328
2329         /*
2330          * In case of hw_restart during suspend (without wowlan),
2331          * cancel restart work, as we are reconfiguring the device
2332          * anyway.
2333          * Note that restart_work is scheduled on a frozen workqueue,
2334          * so we can't deadlock in this case.
2335          */
2336         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2337                 cancel_work_sync(&local->restart_work);
2338
2339         local->started = false;
2340
2341         /*
2342          * Upon resume hardware can sometimes be goofy due to
2343          * various platform / driver / bus issues, so restarting
2344          * the device may at times not work immediately. Propagate
2345          * the error.
2346          */
2347         res = drv_start(local);
2348         if (res) {
2349                 if (suspended)
2350                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2351                 else
2352                         WARN(1, "Hardware became unavailable during restart.\n");
2353                 ieee80211_handle_reconfig_failure(local);
2354                 return res;
2355         }
2356
2357         /* setup fragmentation threshold */
2358         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2359
2360         /* setup RTS threshold */
2361         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2362
2363         /* reset coverage class */
2364         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2365
2366         ieee80211_led_radio(local, true);
2367         ieee80211_mod_tpt_led_trig(local,
2368                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2369
2370         /* add interfaces */
2371         sdata = rtnl_dereference(local->monitor_sdata);
2372         if (sdata) {
2373                 /* in HW restart it exists already */
2374                 WARN_ON(local->resuming);
2375                 res = drv_add_interface(local, sdata);
2376                 if (WARN_ON(res)) {
2377                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2378                         synchronize_net();
2379                         kfree(sdata);
2380                 }
2381         }
2382
2383         list_for_each_entry(sdata, &local->interfaces, list) {
2384                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2385                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2386                     ieee80211_sdata_running(sdata)) {
2387                         res = drv_add_interface(local, sdata);
2388                         if (WARN_ON(res))
2389                                 break;
2390                 }
2391         }
2392
2393         /* If adding any of the interfaces failed above, roll back and
2394          * report failure.
2395          */
2396         if (res) {
2397                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2398                                                      list)
2399                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2400                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2401                             ieee80211_sdata_running(sdata))
2402                                 drv_remove_interface(local, sdata);
2403                 ieee80211_handle_reconfig_failure(local);
2404                 return res;
2405         }
2406
2407         /* add channel contexts */
2408         if (local->use_chanctx) {
2409                 mutex_lock(&local->chanctx_mtx);
2410                 list_for_each_entry(ctx, &local->chanctx_list, list)
2411                         if (ctx->replace_state !=
2412                             IEEE80211_CHANCTX_REPLACES_OTHER)
2413                                 WARN_ON(drv_add_chanctx(local, ctx));
2414                 mutex_unlock(&local->chanctx_mtx);
2415
2416                 sdata = rtnl_dereference(local->monitor_sdata);
2417                 if (sdata && ieee80211_sdata_running(sdata))
2418                         ieee80211_assign_chanctx(local, sdata);
2419         }
2420
2421         /* reconfigure hardware */
2422         ieee80211_hw_config(local, ~0);
2423
2424         ieee80211_configure_filter(local);
2425
2426         /* Finally also reconfigure all the BSS information */
2427         list_for_each_entry(sdata, &local->interfaces, list) {
2428                 u32 changed;
2429
2430                 if (!ieee80211_sdata_running(sdata))
2431                         continue;
2432
2433                 ieee80211_assign_chanctx(local, sdata);
2434
2435                 switch (sdata->vif.type) {
2436                 case NL80211_IFTYPE_AP_VLAN:
2437                 case NL80211_IFTYPE_MONITOR:
2438                         break;
2439                 case NL80211_IFTYPE_ADHOC:
2440                         if (sdata->vif.bss_conf.ibss_joined)
2441                                 WARN_ON(drv_join_ibss(local, sdata));
2442                         fallthrough;
2443                 default:
2444                         ieee80211_reconfig_stations(sdata);
2445                         fallthrough;
2446                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2447                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2448                                 drv_conf_tx(local, sdata, i,
2449                                             &sdata->tx_conf[i]);
2450                         break;
2451                 }
2452
2453                 /* common change flags for all interface types */
2454                 changed = BSS_CHANGED_ERP_CTS_PROT |
2455                           BSS_CHANGED_ERP_PREAMBLE |
2456                           BSS_CHANGED_ERP_SLOT |
2457                           BSS_CHANGED_HT |
2458                           BSS_CHANGED_BASIC_RATES |
2459                           BSS_CHANGED_BEACON_INT |
2460                           BSS_CHANGED_BSSID |
2461                           BSS_CHANGED_CQM |
2462                           BSS_CHANGED_QOS |
2463                           BSS_CHANGED_IDLE |
2464                           BSS_CHANGED_TXPOWER |
2465                           BSS_CHANGED_MCAST_RATE;
2466
2467                 if (sdata->vif.mu_mimo_owner)
2468                         changed |= BSS_CHANGED_MU_GROUPS;
2469
2470                 switch (sdata->vif.type) {
2471                 case NL80211_IFTYPE_STATION:
2472                         changed |= BSS_CHANGED_ASSOC |
2473                                    BSS_CHANGED_ARP_FILTER |
2474                                    BSS_CHANGED_PS;
2475
2476                         /* Re-send beacon info report to the driver */
2477                         if (sdata->u.mgd.have_beacon)
2478                                 changed |= BSS_CHANGED_BEACON_INFO;
2479
2480                         if (sdata->vif.bss_conf.max_idle_period ||
2481                             sdata->vif.bss_conf.protected_keep_alive)
2482                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2483
2484                         sdata_lock(sdata);
2485                         ieee80211_bss_info_change_notify(sdata, changed);
2486                         sdata_unlock(sdata);
2487                         break;
2488                 case NL80211_IFTYPE_OCB:
2489                         changed |= BSS_CHANGED_OCB;
2490                         ieee80211_bss_info_change_notify(sdata, changed);
2491                         break;
2492                 case NL80211_IFTYPE_ADHOC:
2493                         changed |= BSS_CHANGED_IBSS;
2494                         fallthrough;
2495                 case NL80211_IFTYPE_AP:
2496                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2497
2498                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2499                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2500                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2501                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2502
2503                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2504                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2505
2506                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2507                                         drv_start_ap(local, sdata);
2508                         }
2509                         fallthrough;
2510                 case NL80211_IFTYPE_MESH_POINT:
2511                         if (sdata->vif.bss_conf.enable_beacon) {
2512                                 changed |= BSS_CHANGED_BEACON |
2513                                            BSS_CHANGED_BEACON_ENABLED;
2514                                 ieee80211_bss_info_change_notify(sdata, changed);
2515                         }
2516                         break;
2517                 case NL80211_IFTYPE_NAN:
2518                         res = ieee80211_reconfig_nan(sdata);
2519                         if (res < 0) {
2520                                 ieee80211_handle_reconfig_failure(local);
2521                                 return res;
2522                         }
2523                         break;
2524                 case NL80211_IFTYPE_WDS:
2525                 case NL80211_IFTYPE_AP_VLAN:
2526                 case NL80211_IFTYPE_MONITOR:
2527                 case NL80211_IFTYPE_P2P_DEVICE:
2528                         /* nothing to do */
2529                         break;
2530                 case NL80211_IFTYPE_UNSPECIFIED:
2531                 case NUM_NL80211_IFTYPES:
2532                 case NL80211_IFTYPE_P2P_CLIENT:
2533                 case NL80211_IFTYPE_P2P_GO:
2534                         WARN_ON(1);
2535                         break;
2536                 }
2537         }
2538
2539         ieee80211_recalc_ps(local);
2540
2541         /*
2542          * The sta might be in psm against the ap (e.g. because
2543          * this was the state before a hw restart), so we
2544          * explicitly send a null packet in order to make sure
2545          * it'll sync against the ap (and get out of psm).
2546          */
2547         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2548                 list_for_each_entry(sdata, &local->interfaces, list) {
2549                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2550                                 continue;
2551                         if (!sdata->u.mgd.associated)
2552                                 continue;
2553
2554                         ieee80211_send_nullfunc(local, sdata, false);
2555                 }
2556         }
2557
2558         /* APs are now beaconing, add back stations */
2559         mutex_lock(&local->sta_mtx);
2560         list_for_each_entry(sta, &local->sta_list, list) {
2561                 enum ieee80211_sta_state state;
2562
2563                 if (!sta->uploaded)
2564                         continue;
2565
2566                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2567                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2568                         continue;
2569
2570                 for (state = IEEE80211_STA_NOTEXIST;
2571                      state < sta->sta_state; state++)
2572                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2573                                               state + 1));
2574         }
2575         mutex_unlock(&local->sta_mtx);
2576
2577         /* add back keys */
2578         list_for_each_entry(sdata, &local->interfaces, list)
2579                 ieee80211_reenable_keys(sdata);
2580
2581         /* Reconfigure sched scan if it was interrupted by FW restart */
2582         mutex_lock(&local->mtx);
2583         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2584                                                 lockdep_is_held(&local->mtx));
2585         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2586                                                 lockdep_is_held(&local->mtx));
2587         if (sched_scan_sdata && sched_scan_req)
2588                 /*
2589                  * Sched scan stopped, but we don't want to report it. Instead,
2590                  * we're trying to reschedule. However, if more than one scan
2591                  * plan was set, we cannot reschedule since we don't know which
2592                  * scan plan was currently running (and some scan plans may have
2593                  * already finished).
2594                  */
2595                 if (sched_scan_req->n_scan_plans > 1 ||
2596                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2597                                                          sched_scan_req)) {
2598                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2599                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2600                         sched_scan_stopped = true;
2601                 }
2602         mutex_unlock(&local->mtx);
2603
2604         if (sched_scan_stopped)
2605                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2606
2607  wake_up:
2608
2609         if (local->monitors == local->open_count && local->monitors > 0)
2610                 ieee80211_add_virtual_monitor(local);
2611
2612         /*
2613          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2614          * sessions can be established after a resume.
2615          *
2616          * Also tear down aggregation sessions since reconfiguring
2617          * them in a hardware restart scenario is not easily done
2618          * right now, and the hardware will have lost information
2619          * about the sessions, but we and the AP still think they
2620          * are active. This is really a workaround though.
2621          */
2622         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2623                 mutex_lock(&local->sta_mtx);
2624
2625                 list_for_each_entry(sta, &local->sta_list, list) {
2626                         if (!local->resuming)
2627                                 ieee80211_sta_tear_down_BA_sessions(
2628                                                 sta, AGG_STOP_LOCAL_REQUEST);
2629                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2630                 }
2631
2632                 mutex_unlock(&local->sta_mtx);
2633         }
2634
2635         if (local->in_reconfig) {
2636                 local->in_reconfig = false;
2637                 barrier();
2638
2639                 /* Restart deferred ROCs */
2640                 mutex_lock(&local->mtx);
2641                 ieee80211_start_next_roc(local);
2642                 mutex_unlock(&local->mtx);
2643
2644                 /* Requeue all works */
2645                 list_for_each_entry(sdata, &local->interfaces, list)
2646                         ieee80211_queue_work(&local->hw, &sdata->work);
2647         }
2648
2649         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2650                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2651                                         false);
2652
2653         /*
2654          * If this is for hw restart things are still running.
2655          * We may want to change that later, however.
2656          */
2657         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2658                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2659
2660         if (!suspended)
2661                 return 0;
2662
2663 #ifdef CONFIG_PM
2664         /* first set suspended false, then resuming */
2665         local->suspended = false;
2666         mb();
2667         local->resuming = false;
2668
2669         ieee80211_flush_completed_scan(local, false);
2670
2671         if (local->open_count && !reconfig_due_to_wowlan)
2672                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2673
2674         list_for_each_entry(sdata, &local->interfaces, list) {
2675                 if (!ieee80211_sdata_running(sdata))
2676                         continue;
2677                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2678                         ieee80211_sta_restart(sdata);
2679         }
2680
2681         mod_timer(&local->sta_cleanup, jiffies + 1);
2682 #else
2683         WARN_ON(1);
2684 #endif
2685
2686         return 0;
2687 }
2688
2689 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2690 {
2691         struct ieee80211_sub_if_data *sdata;
2692         struct ieee80211_local *local;
2693         struct ieee80211_key *key;
2694
2695         if (WARN_ON(!vif))
2696                 return;
2697
2698         sdata = vif_to_sdata(vif);
2699         local = sdata->local;
2700
2701         if (WARN_ON(!local->resuming))
2702                 return;
2703
2704         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2705                 return;
2706
2707         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2708
2709         mutex_lock(&local->key_mtx);
2710         list_for_each_entry(key, &sdata->key_list, list)
2711                 key->flags |= KEY_FLAG_TAINTED;
2712         mutex_unlock(&local->key_mtx);
2713 }
2714 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2715
2716 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2717 {
2718         struct ieee80211_local *local = sdata->local;
2719         struct ieee80211_chanctx_conf *chanctx_conf;
2720         struct ieee80211_chanctx *chanctx;
2721
2722         mutex_lock(&local->chanctx_mtx);
2723
2724         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2725                                         lockdep_is_held(&local->chanctx_mtx));
2726
2727         /*
2728          * This function can be called from a work, thus it may be possible
2729          * that the chanctx_conf is removed (due to a disconnection, for
2730          * example).
2731          * So nothing should be done in such case.
2732          */
2733         if (!chanctx_conf)
2734                 goto unlock;
2735
2736         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2737         ieee80211_recalc_smps_chanctx(local, chanctx);
2738  unlock:
2739         mutex_unlock(&local->chanctx_mtx);
2740 }
2741
2742 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2743 {
2744         struct ieee80211_local *local = sdata->local;
2745         struct ieee80211_chanctx_conf *chanctx_conf;
2746         struct ieee80211_chanctx *chanctx;
2747
2748         mutex_lock(&local->chanctx_mtx);
2749
2750         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2751                                         lockdep_is_held(&local->chanctx_mtx));
2752
2753         if (WARN_ON_ONCE(!chanctx_conf))
2754                 goto unlock;
2755
2756         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2757         ieee80211_recalc_chanctx_min_def(local, chanctx);
2758  unlock:
2759         mutex_unlock(&local->chanctx_mtx);
2760 }
2761
2762 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2763 {
2764         size_t pos = offset;
2765
2766         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2767                 pos += 2 + ies[pos + 1];
2768
2769         return pos;
2770 }
2771
2772 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2773                                             int rssi_min_thold,
2774                                             int rssi_max_thold)
2775 {
2776         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2777
2778         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2779                 return;
2780
2781         /*
2782          * Scale up threshold values before storing it, as the RSSI averaging
2783          * algorithm uses a scaled up value as well. Change this scaling
2784          * factor if the RSSI averaging algorithm changes.
2785          */
2786         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2787         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2788 }
2789
2790 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2791                                     int rssi_min_thold,
2792                                     int rssi_max_thold)
2793 {
2794         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2795
2796         WARN_ON(rssi_min_thold == rssi_max_thold ||
2797                 rssi_min_thold > rssi_max_thold);
2798
2799         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2800                                        rssi_max_thold);
2801 }
2802 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2803
2804 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2805 {
2806         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2807
2808         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2809 }
2810 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2811
2812 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2813                               u16 cap)
2814 {
2815         __le16 tmp;
2816
2817         *pos++ = WLAN_EID_HT_CAPABILITY;
2818         *pos++ = sizeof(struct ieee80211_ht_cap);
2819         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2820
2821         /* capability flags */
2822         tmp = cpu_to_le16(cap);
2823         memcpy(pos, &tmp, sizeof(u16));
2824         pos += sizeof(u16);
2825
2826         /* AMPDU parameters */
2827         *pos++ = ht_cap->ampdu_factor |
2828                  (ht_cap->ampdu_density <<
2829                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2830
2831         /* MCS set */
2832         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2833         pos += sizeof(ht_cap->mcs);
2834
2835         /* extended capabilities */
2836         pos += sizeof(__le16);
2837
2838         /* BF capabilities */
2839         pos += sizeof(__le32);
2840
2841         /* antenna selection */
2842         pos += sizeof(u8);
2843
2844         return pos;
2845 }
2846
2847 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2848                                u32 cap)
2849 {
2850         __le32 tmp;
2851
2852         *pos++ = WLAN_EID_VHT_CAPABILITY;
2853         *pos++ = sizeof(struct ieee80211_vht_cap);
2854         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2855
2856         /* capability flags */
2857         tmp = cpu_to_le32(cap);
2858         memcpy(pos, &tmp, sizeof(u32));
2859         pos += sizeof(u32);
2860
2861         /* VHT MCS set */
2862         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2863         pos += sizeof(vht_cap->vht_mcs);
2864
2865         return pos;
2866 }
2867
2868 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2869 {
2870         const struct ieee80211_sta_he_cap *he_cap;
2871         struct ieee80211_supported_band *sband;
2872         u8 n;
2873
2874         sband = ieee80211_get_sband(sdata);
2875         if (!sband)
2876                 return 0;
2877
2878         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2879         if (!he_cap)
2880                 return 0;
2881
2882         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2883         return 2 + 1 +
2884                sizeof(he_cap->he_cap_elem) + n +
2885                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2886                                      he_cap->he_cap_elem.phy_cap_info);
2887 }
2888
2889 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2890                               const struct ieee80211_sta_he_cap *he_cap,
2891                               u8 *end)
2892 {
2893         u8 n;
2894         u8 ie_len;
2895         u8 *orig_pos = pos;
2896
2897         /* Make sure we have place for the IE */
2898         /*
2899          * TODO: the 1 added is because this temporarily is under the EXTENSION
2900          * IE. Get rid of it when it moves.
2901          */
2902         if (!he_cap)
2903                 return orig_pos;
2904
2905         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2906         ie_len = 2 + 1 +
2907                  sizeof(he_cap->he_cap_elem) + n +
2908                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2909                                        he_cap->he_cap_elem.phy_cap_info);
2910
2911         if ((end - pos) < ie_len)
2912                 return orig_pos;
2913
2914         *pos++ = WLAN_EID_EXTENSION;
2915         pos++; /* We'll set the size later below */
2916         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2917
2918         /* Fixed data */
2919         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2920         pos += sizeof(he_cap->he_cap_elem);
2921
2922         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2923         pos += n;
2924
2925         /* Check if PPE Threshold should be present */
2926         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2927              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2928                 goto end;
2929
2930         /*
2931          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2932          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2933          */
2934         n = hweight8(he_cap->ppe_thres[0] &
2935                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2936         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2937                    IEEE80211_PPE_THRES_NSS_POS));
2938
2939         /*
2940          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2941          * total size.
2942          */
2943         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2944         n = DIV_ROUND_UP(n, 8);
2945
2946         /* Copy PPE Thresholds */
2947         memcpy(pos, &he_cap->ppe_thres, n);
2948         pos += n;
2949
2950 end:
2951         orig_pos[1] = (pos - orig_pos) - 2;
2952         return pos;
2953 }
2954
2955 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2956                                     struct sk_buff *skb)
2957 {
2958         struct ieee80211_supported_band *sband;
2959         const struct ieee80211_sband_iftype_data *iftd;
2960         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2961         u8 *pos;
2962         u16 cap;
2963
2964         sband = ieee80211_get_sband(sdata);
2965         if (!sband)
2966                 return;
2967
2968         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2969         if (WARN_ON(!iftd))
2970                 return;
2971
2972         /* Check for device HE 6 GHz capability before adding element */
2973         if (!iftd->he_6ghz_capa.capa)
2974                 return;
2975
2976         cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2977         cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2978
2979         switch (sdata->smps_mode) {
2980         case IEEE80211_SMPS_AUTOMATIC:
2981         case IEEE80211_SMPS_NUM_MODES:
2982                 WARN_ON(1);
2983                 fallthrough;
2984         case IEEE80211_SMPS_OFF:
2985                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2986                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2987                 break;
2988         case IEEE80211_SMPS_STATIC:
2989                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2990                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2991                 break;
2992         case IEEE80211_SMPS_DYNAMIC:
2993                 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2994                                        IEEE80211_HE_6GHZ_CAP_SM_PS);
2995                 break;
2996         }
2997
2998         pos = skb_put(skb, 2 + 1 + sizeof(cap));
2999         ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
3000                                     pos + 2 + 1 + sizeof(cap));
3001 }
3002
3003 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
3004                                const struct cfg80211_chan_def *chandef,
3005                                u16 prot_mode, bool rifs_mode)
3006 {
3007         struct ieee80211_ht_operation *ht_oper;
3008         /* Build HT Information */
3009         *pos++ = WLAN_EID_HT_OPERATION;
3010         *pos++ = sizeof(struct ieee80211_ht_operation);
3011         ht_oper = (struct ieee80211_ht_operation *)pos;
3012         ht_oper->primary_chan = ieee80211_frequency_to_channel(
3013                                         chandef->chan->center_freq);
3014         switch (chandef->width) {
3015         case NL80211_CHAN_WIDTH_160:
3016         case NL80211_CHAN_WIDTH_80P80:
3017         case NL80211_CHAN_WIDTH_80:
3018         case NL80211_CHAN_WIDTH_40:
3019                 if (chandef->center_freq1 > chandef->chan->center_freq)
3020                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3021                 else
3022                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3023                 break;
3024         default:
3025                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3026                 break;
3027         }
3028         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3029             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3030             chandef->width != NL80211_CHAN_WIDTH_20)
3031                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3032
3033         if (rifs_mode)
3034                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3035
3036         ht_oper->operation_mode = cpu_to_le16(prot_mode);
3037         ht_oper->stbc_param = 0x0000;
3038
3039         /* It seems that Basic MCS set and Supported MCS set
3040            are identical for the first 10 bytes */
3041         memset(&ht_oper->basic_set, 0, 16);
3042         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3043
3044         return pos + sizeof(struct ieee80211_ht_operation);
3045 }
3046
3047 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3048                                    const struct cfg80211_chan_def *chandef)
3049 {
3050         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
3051         *pos++ = 3;                                     /* IE length */
3052         /* New channel width */
3053         switch (chandef->width) {
3054         case NL80211_CHAN_WIDTH_80:
3055                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3056                 break;
3057         case NL80211_CHAN_WIDTH_160:
3058                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3059                 break;
3060         case NL80211_CHAN_WIDTH_80P80:
3061                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3062                 break;
3063         default:
3064                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3065         }
3066
3067         /* new center frequency segment 0 */
3068         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3069         /* new center frequency segment 1 */
3070         if (chandef->center_freq2)
3071                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3072         else
3073                 *pos++ = 0;
3074 }
3075
3076 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3077                                 const struct cfg80211_chan_def *chandef)
3078 {
3079         struct ieee80211_vht_operation *vht_oper;
3080
3081         *pos++ = WLAN_EID_VHT_OPERATION;
3082         *pos++ = sizeof(struct ieee80211_vht_operation);
3083         vht_oper = (struct ieee80211_vht_operation *)pos;
3084         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3085                                                         chandef->center_freq1);
3086         if (chandef->center_freq2)
3087                 vht_oper->center_freq_seg1_idx =
3088                         ieee80211_frequency_to_channel(chandef->center_freq2);
3089         else
3090                 vht_oper->center_freq_seg1_idx = 0x00;
3091
3092         switch (chandef->width) {
3093         case NL80211_CHAN_WIDTH_160:
3094                 /*
3095                  * Convert 160 MHz channel width to new style as interop
3096                  * workaround.
3097                  */
3098                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3099                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3100                 if (chandef->chan->center_freq < chandef->center_freq1)
3101                         vht_oper->center_freq_seg0_idx -= 8;
3102                 else
3103                         vht_oper->center_freq_seg0_idx += 8;
3104                 break;
3105         case NL80211_CHAN_WIDTH_80P80:
3106                 /*
3107                  * Convert 80+80 MHz channel width to new style as interop
3108                  * workaround.
3109                  */
3110                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3111                 break;
3112         case NL80211_CHAN_WIDTH_80:
3113                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3114                 break;
3115         default:
3116                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3117                 break;
3118         }
3119
3120         /* don't require special VHT peer rates */
3121         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3122
3123         return pos + sizeof(struct ieee80211_vht_operation);
3124 }
3125
3126 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3127 {
3128         struct ieee80211_he_operation *he_oper;
3129         struct ieee80211_he_6ghz_oper *he_6ghz_op;
3130         u32 he_oper_params;
3131         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3132
3133         if (chandef->chan->band == NL80211_BAND_6GHZ)
3134                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3135
3136         *pos++ = WLAN_EID_EXTENSION;
3137         *pos++ = ie_len;
3138         *pos++ = WLAN_EID_EXT_HE_OPERATION;
3139
3140         he_oper_params = 0;
3141         he_oper_params |= u32_encode_bits(1023, /* disabled */
3142                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3143         he_oper_params |= u32_encode_bits(1,
3144                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3145         he_oper_params |= u32_encode_bits(1,
3146                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3147         if (chandef->chan->band == NL80211_BAND_6GHZ)
3148                 he_oper_params |= u32_encode_bits(1,
3149                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3150
3151         he_oper = (struct ieee80211_he_operation *)pos;
3152         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3153
3154         /* don't require special HE peer rates */
3155         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3156         pos += sizeof(struct ieee80211_he_operation);
3157
3158         if (chandef->chan->band != NL80211_BAND_6GHZ)
3159                 goto out;
3160
3161         /* TODO add VHT operational */
3162         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3163         he_6ghz_op->minrate = 6; /* 6 Mbps */
3164         he_6ghz_op->primary =
3165                 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3166         he_6ghz_op->ccfs0 =
3167                 ieee80211_frequency_to_channel(chandef->center_freq1);
3168         if (chandef->center_freq2)
3169                 he_6ghz_op->ccfs1 =
3170                         ieee80211_frequency_to_channel(chandef->center_freq2);
3171         else
3172                 he_6ghz_op->ccfs1 = 0;
3173
3174         switch (chandef->width) {
3175         case NL80211_CHAN_WIDTH_160:
3176                 /* Convert 160 MHz channel width to new style as interop
3177                  * workaround.
3178                  */
3179                 he_6ghz_op->control =
3180                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3181                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3182                 if (chandef->chan->center_freq < chandef->center_freq1)
3183                         he_6ghz_op->ccfs0 -= 8;
3184                 else
3185                         he_6ghz_op->ccfs0 += 8;
3186                 fallthrough;
3187         case NL80211_CHAN_WIDTH_80P80:
3188                 he_6ghz_op->control =
3189                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3190                 break;
3191         case NL80211_CHAN_WIDTH_80:
3192                 he_6ghz_op->control =
3193                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3194                 break;
3195         case NL80211_CHAN_WIDTH_40:
3196                 he_6ghz_op->control =
3197                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3198                 break;
3199         default:
3200                 he_6ghz_op->control =
3201                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3202                 break;
3203         }
3204
3205         pos += sizeof(struct ieee80211_he_6ghz_oper);
3206
3207 out:
3208         return pos;
3209 }
3210
3211 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3212                                struct cfg80211_chan_def *chandef)
3213 {
3214         enum nl80211_channel_type channel_type;
3215
3216         if (!ht_oper)
3217                 return false;
3218
3219         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3220         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3221                 channel_type = NL80211_CHAN_HT20;
3222                 break;
3223         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3224                 channel_type = NL80211_CHAN_HT40PLUS;
3225                 break;
3226         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3227                 channel_type = NL80211_CHAN_HT40MINUS;
3228                 break;
3229         default:
3230                 channel_type = NL80211_CHAN_NO_HT;
3231                 return false;
3232         }
3233
3234         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3235         return true;
3236 }
3237
3238 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3239                                 const struct ieee80211_vht_operation *oper,
3240                                 const struct ieee80211_ht_operation *htop,
3241                                 struct cfg80211_chan_def *chandef)
3242 {
3243         struct cfg80211_chan_def new = *chandef;
3244         int cf0, cf1;
3245         int ccfs0, ccfs1, ccfs2;
3246         int ccf0, ccf1;
3247         u32 vht_cap;
3248         bool support_80_80 = false;
3249         bool support_160 = false;
3250         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3251                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3252         u8 supp_chwidth = u32_get_bits(vht_cap_info,
3253                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3254
3255         if (!oper || !htop)
3256                 return false;
3257
3258         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3259         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3260                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3261         support_80_80 = ((vht_cap &
3262                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3263                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3264                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3265                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3266                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3267         ccfs0 = oper->center_freq_seg0_idx;
3268         ccfs1 = oper->center_freq_seg1_idx;
3269         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3270                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3271                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3272
3273         ccf0 = ccfs0;
3274
3275         /* if not supported, parse as though we didn't understand it */
3276         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3277                 ext_nss_bw_supp = 0;
3278
3279         /*
3280          * Cf. IEEE 802.11 Table 9-250
3281          *
3282          * We really just consider that because it's inefficient to connect
3283          * at a higher bandwidth than we'll actually be able to use.
3284          */
3285         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3286         default:
3287         case 0x00:
3288                 ccf1 = 0;
3289                 support_160 = false;
3290                 support_80_80 = false;
3291                 break;
3292         case 0x01:
3293                 support_80_80 = false;
3294                 fallthrough;
3295         case 0x02:
3296         case 0x03:
3297                 ccf1 = ccfs2;
3298                 break;
3299         case 0x10:
3300                 ccf1 = ccfs1;
3301                 break;
3302         case 0x11:
3303         case 0x12:
3304                 if (!ccfs1)
3305                         ccf1 = ccfs2;
3306                 else
3307                         ccf1 = ccfs1;
3308                 break;
3309         case 0x13:
3310         case 0x20:
3311         case 0x23:
3312                 ccf1 = ccfs1;
3313                 break;
3314         }
3315
3316         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3317         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3318
3319         switch (oper->chan_width) {
3320         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3321                 /* just use HT information directly */
3322                 break;
3323         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3324                 new.width = NL80211_CHAN_WIDTH_80;
3325                 new.center_freq1 = cf0;
3326                 /* If needed, adjust based on the newer interop workaround. */
3327                 if (ccf1) {
3328                         unsigned int diff;
3329
3330                         diff = abs(ccf1 - ccf0);
3331                         if ((diff == 8) && support_160) {
3332                                 new.width = NL80211_CHAN_WIDTH_160;
3333                                 new.center_freq1 = cf1;
3334                         } else if ((diff > 8) && support_80_80) {
3335                                 new.width = NL80211_CHAN_WIDTH_80P80;
3336                                 new.center_freq2 = cf1;
3337                         }
3338                 }
3339                 break;
3340         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3341                 /* deprecated encoding */
3342                 new.width = NL80211_CHAN_WIDTH_160;
3343                 new.center_freq1 = cf0;
3344                 break;
3345         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3346                 /* deprecated encoding */
3347                 new.width = NL80211_CHAN_WIDTH_80P80;
3348                 new.center_freq1 = cf0;
3349                 new.center_freq2 = cf1;
3350                 break;
3351         default:
3352                 return false;
3353         }
3354
3355         if (!cfg80211_chandef_valid(&new))
3356                 return false;
3357
3358         *chandef = new;
3359         return true;
3360 }
3361
3362 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3363                                     const struct ieee80211_he_operation *he_oper,
3364                                     struct cfg80211_chan_def *chandef)
3365 {
3366         struct ieee80211_local *local = sdata->local;
3367         struct ieee80211_supported_band *sband;
3368         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3369         const struct ieee80211_sta_he_cap *he_cap;
3370         struct cfg80211_chan_def he_chandef = *chandef;
3371         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3372         bool support_80_80, support_160;
3373         u8 he_phy_cap;
3374         u32 freq;
3375
3376         if (chandef->chan->band != NL80211_BAND_6GHZ)
3377                 return true;
3378
3379         sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3380
3381         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3382         if (!he_cap) {
3383                 sdata_info(sdata, "Missing iftype sband data/HE cap");
3384                 return false;
3385         }
3386
3387         he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3388         support_160 =
3389                 he_phy_cap &
3390                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3391         support_80_80 =
3392                 he_phy_cap &
3393                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3394
3395         if (!he_oper) {
3396                 sdata_info(sdata,
3397                            "HE is not advertised on (on %d MHz), expect issues\n",
3398                            chandef->chan->center_freq);
3399                 return false;
3400         }
3401
3402         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3403
3404         if (!he_6ghz_oper) {
3405                 sdata_info(sdata,
3406                            "HE 6GHz operation missing (on %d MHz), expect issues\n",
3407                            chandef->chan->center_freq);
3408                 return false;
3409         }
3410
3411         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3412                                               NL80211_BAND_6GHZ);
3413         he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3414
3415         switch (u8_get_bits(he_6ghz_oper->control,
3416                             IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3417         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3418                 he_chandef.width = NL80211_CHAN_WIDTH_20;
3419                 break;
3420         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3421                 he_chandef.width = NL80211_CHAN_WIDTH_40;
3422                 break;
3423         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3424                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3425                 break;
3426         case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3427                 he_chandef.width = NL80211_CHAN_WIDTH_80;
3428                 if (!he_6ghz_oper->ccfs1)
3429                         break;
3430                 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3431                         if (support_160)
3432                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3433                 } else {
3434                         if (support_80_80)
3435                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3436                 }
3437                 break;
3438         }
3439
3440         if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3441                 he_chandef.center_freq1 =
3442                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3443                                                        NL80211_BAND_6GHZ);
3444         } else {
3445                 he_chandef.center_freq1 =
3446                         ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3447                                                        NL80211_BAND_6GHZ);
3448                 if (support_80_80 || support_160)
3449                         he_chandef.center_freq2 =
3450                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3451                                                                NL80211_BAND_6GHZ);
3452         }
3453
3454         if (!cfg80211_chandef_valid(&he_chandef)) {
3455                 sdata_info(sdata,
3456                            "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3457                            he_chandef.chan ? he_chandef.chan->center_freq : 0,
3458                            he_chandef.width,
3459                            he_chandef.center_freq1,
3460                            he_chandef.center_freq2);
3461                 return false;
3462         }
3463
3464         *chandef = he_chandef;
3465
3466         return true;
3467 }
3468
3469 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3470                                 struct cfg80211_chan_def *chandef)
3471 {
3472         u32 oper_freq;
3473
3474         if (!oper)
3475                 return false;
3476
3477         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3478         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3479                 chandef->width = NL80211_CHAN_WIDTH_1;
3480                 break;
3481         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3482                 chandef->width = NL80211_CHAN_WIDTH_2;
3483                 break;
3484         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3485                 chandef->width = NL80211_CHAN_WIDTH_4;
3486                 break;
3487         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3488                 chandef->width = NL80211_CHAN_WIDTH_8;
3489                 break;
3490         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3491                 chandef->width = NL80211_CHAN_WIDTH_16;
3492                 break;
3493         default:
3494                 return false;
3495         }
3496
3497         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3498                                                   NL80211_BAND_S1GHZ);
3499         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3500         chandef->freq1_offset = oper_freq % 1000;
3501
3502         return true;
3503 }
3504
3505 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3506                              const struct ieee80211_supported_band *sband,
3507                              const u8 *srates, int srates_len, u32 *rates)
3508 {
3509         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3510         int shift = ieee80211_chandef_get_shift(chandef);
3511         struct ieee80211_rate *br;
3512         int brate, rate, i, j, count = 0;
3513
3514         *rates = 0;
3515
3516         for (i = 0; i < srates_len; i++) {
3517                 rate = srates[i] & 0x7f;
3518
3519                 for (j = 0; j < sband->n_bitrates; j++) {
3520                         br = &sband->bitrates[j];
3521                         if ((rate_flags & br->flags) != rate_flags)
3522                                 continue;
3523
3524                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3525                         if (brate == rate) {
3526                                 *rates |= BIT(j);
3527                                 count++;
3528                                 break;
3529                         }
3530                 }
3531         }
3532         return count;
3533 }
3534
3535 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3536                             struct sk_buff *skb, bool need_basic,
3537                             enum nl80211_band band)
3538 {
3539         struct ieee80211_local *local = sdata->local;
3540         struct ieee80211_supported_band *sband;
3541         int rate, shift;
3542         u8 i, rates, *pos;
3543         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3544         u32 rate_flags;
3545
3546         shift = ieee80211_vif_get_shift(&sdata->vif);
3547         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3548         sband = local->hw.wiphy->bands[band];
3549         rates = 0;
3550         for (i = 0; i < sband->n_bitrates; i++) {
3551                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3552                         continue;
3553                 rates++;
3554         }
3555         if (rates > 8)
3556                 rates = 8;
3557
3558         if (skb_tailroom(skb) < rates + 2)
3559                 return -ENOMEM;
3560
3561         pos = skb_put(skb, rates + 2);
3562         *pos++ = WLAN_EID_SUPP_RATES;
3563         *pos++ = rates;
3564         for (i = 0; i < rates; i++) {
3565                 u8 basic = 0;
3566                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3567                         continue;
3568
3569                 if (need_basic && basic_rates & BIT(i))
3570                         basic = 0x80;
3571                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3572                                     5 * (1 << shift));
3573                 *pos++ = basic | (u8) rate;
3574         }
3575
3576         return 0;
3577 }
3578
3579 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3580                                 struct sk_buff *skb, bool need_basic,
3581                                 enum nl80211_band band)
3582 {
3583         struct ieee80211_local *local = sdata->local;
3584         struct ieee80211_supported_band *sband;
3585         int rate, shift;
3586         u8 i, exrates, *pos;
3587         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3588         u32 rate_flags;
3589
3590         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3591         shift = ieee80211_vif_get_shift(&sdata->vif);
3592
3593         sband = local->hw.wiphy->bands[band];
3594         exrates = 0;
3595         for (i = 0; i < sband->n_bitrates; i++) {
3596                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3597                         continue;
3598                 exrates++;
3599         }
3600
3601         if (exrates > 8)
3602                 exrates -= 8;
3603         else
3604                 exrates = 0;
3605
3606         if (skb_tailroom(skb) < exrates + 2)
3607                 return -ENOMEM;
3608
3609         if (exrates) {
3610                 pos = skb_put(skb, exrates + 2);
3611                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3612                 *pos++ = exrates;
3613                 for (i = 8; i < sband->n_bitrates; i++) {
3614                         u8 basic = 0;
3615                         if ((rate_flags & sband->bitrates[i].flags)
3616                             != rate_flags)
3617                                 continue;
3618                         if (need_basic && basic_rates & BIT(i))
3619                                 basic = 0x80;
3620                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3621                                             5 * (1 << shift));
3622                         *pos++ = basic | (u8) rate;
3623                 }
3624         }
3625         return 0;
3626 }
3627
3628 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3629 {
3630         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3631         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3632
3633         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3634                 /* non-managed type inferfaces */
3635                 return 0;
3636         }
3637         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3638 }
3639 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3640
3641 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3642 {
3643         if (!mcs)
3644                 return 1;
3645
3646         /* TODO: consider rx_highest */
3647
3648         if (mcs->rx_mask[3])
3649                 return 4;
3650         if (mcs->rx_mask[2])
3651                 return 3;
3652         if (mcs->rx_mask[1])
3653                 return 2;
3654         return 1;
3655 }
3656
3657 /**
3658  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3659  * @local: mac80211 hw info struct
3660  * @status: RX status
3661  * @mpdu_len: total MPDU length (including FCS)
3662  * @mpdu_offset: offset into MPDU to calculate timestamp at
3663  *
3664  * This function calculates the RX timestamp at the given MPDU offset, taking
3665  * into account what the RX timestamp was. An offset of 0 will just normalize
3666  * the timestamp to TSF at beginning of MPDU reception.
3667  */
3668 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3669                                      struct ieee80211_rx_status *status,
3670                                      unsigned int mpdu_len,
3671                                      unsigned int mpdu_offset)
3672 {
3673         u64 ts = status->mactime;
3674         struct rate_info ri;
3675         u16 rate;
3676
3677         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3678                 return 0;
3679
3680         memset(&ri, 0, sizeof(ri));
3681
3682         ri.bw = status->bw;
3683
3684         /* Fill cfg80211 rate info */
3685         switch (status->encoding) {
3686         case RX_ENC_HT:
3687                 ri.mcs = status->rate_idx;
3688                 ri.flags |= RATE_INFO_FLAGS_MCS;
3689                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3690                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3691                 break;
3692         case RX_ENC_VHT:
3693                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3694                 ri.mcs = status->rate_idx;
3695                 ri.nss = status->nss;
3696                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3697                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3698                 break;
3699         default:
3700                 WARN_ON(1);
3701                 fallthrough;
3702         case RX_ENC_LEGACY: {
3703                 struct ieee80211_supported_band *sband;
3704                 int shift = 0;
3705                 int bitrate;
3706
3707                 switch (status->bw) {
3708                 case RATE_INFO_BW_10:
3709                         shift = 1;
3710                         break;
3711                 case RATE_INFO_BW_5:
3712                         shift = 2;
3713                         break;
3714                 }
3715
3716                 sband = local->hw.wiphy->bands[status->band];
3717                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3718                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3719
3720                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3721                         /* TODO: handle HT/VHT preambles */
3722                         if (status->band == NL80211_BAND_5GHZ) {
3723                                 ts += 20 << shift;
3724                                 mpdu_offset += 2;
3725                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3726                                 ts += 96;
3727                         } else {
3728                                 ts += 192;
3729                         }
3730                 }
3731                 break;
3732                 }
3733         }
3734
3735         rate = cfg80211_calculate_bitrate(&ri);
3736         if (WARN_ONCE(!rate,
3737                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3738                       (unsigned long long)status->flag, status->rate_idx,
3739                       status->nss))
3740                 return 0;
3741
3742         /* rewind from end of MPDU */
3743         if (status->flag & RX_FLAG_MACTIME_END)
3744                 ts -= mpdu_len * 8 * 10 / rate;
3745
3746         ts += mpdu_offset * 8 * 10 / rate;
3747
3748         return ts;
3749 }
3750
3751 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3752 {
3753         struct ieee80211_sub_if_data *sdata;
3754         struct cfg80211_chan_def chandef;
3755
3756         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3757         ASSERT_RTNL();
3758
3759         mutex_lock(&local->mtx);
3760         list_for_each_entry(sdata, &local->interfaces, list) {
3761                 /* it might be waiting for the local->mtx, but then
3762                  * by the time it gets it, sdata->wdev.cac_started
3763                  * will no longer be true
3764                  */
3765                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3766
3767                 if (sdata->wdev.cac_started) {
3768                         chandef = sdata->vif.bss_conf.chandef;
3769                         ieee80211_vif_release_channel(sdata);
3770                         cfg80211_cac_event(sdata->dev,
3771                                            &chandef,
3772                                            NL80211_RADAR_CAC_ABORTED,
3773                                            GFP_KERNEL);
3774                 }
3775         }
3776         mutex_unlock(&local->mtx);
3777 }
3778
3779 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3780 {
3781         struct ieee80211_local *local =
3782                 container_of(work, struct ieee80211_local, radar_detected_work);
3783         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3784         struct ieee80211_chanctx *ctx;
3785         int num_chanctx = 0;
3786
3787         mutex_lock(&local->chanctx_mtx);
3788         list_for_each_entry(ctx, &local->chanctx_list, list) {
3789                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3790                         continue;
3791
3792                 num_chanctx++;
3793                 chandef = ctx->conf.def;
3794         }
3795         mutex_unlock(&local->chanctx_mtx);
3796
3797         rtnl_lock();
3798         ieee80211_dfs_cac_cancel(local);
3799         rtnl_unlock();
3800
3801         if (num_chanctx > 1)
3802                 /* XXX: multi-channel is not supported yet */
3803                 WARN_ON(1);
3804         else
3805                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3806 }
3807
3808 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3809 {
3810         struct ieee80211_local *local = hw_to_local(hw);
3811
3812         trace_api_radar_detected(local);
3813
3814         schedule_work(&local->radar_detected_work);
3815 }
3816 EXPORT_SYMBOL(ieee80211_radar_detected);
3817
3818 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3819 {
3820         u32 ret;
3821         int tmp;
3822
3823         switch (c->width) {
3824         case NL80211_CHAN_WIDTH_20:
3825                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3826                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3827                 break;
3828         case NL80211_CHAN_WIDTH_40:
3829                 c->width = NL80211_CHAN_WIDTH_20;
3830                 c->center_freq1 = c->chan->center_freq;
3831                 ret = IEEE80211_STA_DISABLE_40MHZ |
3832                       IEEE80211_STA_DISABLE_VHT;
3833                 break;
3834         case NL80211_CHAN_WIDTH_80:
3835                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3836                 /* n_P40 */
3837                 tmp /= 2;
3838                 /* freq_P40 */
3839                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3840                 c->width = NL80211_CHAN_WIDTH_40;
3841                 ret = IEEE80211_STA_DISABLE_VHT;
3842                 break;
3843         case NL80211_CHAN_WIDTH_80P80:
3844                 c->center_freq2 = 0;
3845                 c->width = NL80211_CHAN_WIDTH_80;
3846                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3847                       IEEE80211_STA_DISABLE_160MHZ;
3848                 break;
3849         case NL80211_CHAN_WIDTH_160:
3850                 /* n_P20 */
3851                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3852                 /* n_P80 */
3853                 tmp /= 4;
3854                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3855                 c->width = NL80211_CHAN_WIDTH_80;
3856                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3857                       IEEE80211_STA_DISABLE_160MHZ;
3858                 break;
3859         default:
3860         case NL80211_CHAN_WIDTH_20_NOHT:
3861                 WARN_ON_ONCE(1);
3862                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3863                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3864                 break;
3865         case NL80211_CHAN_WIDTH_1:
3866         case NL80211_CHAN_WIDTH_2:
3867         case NL80211_CHAN_WIDTH_4:
3868         case NL80211_CHAN_WIDTH_8:
3869         case NL80211_CHAN_WIDTH_16:
3870         case NL80211_CHAN_WIDTH_5:
3871         case NL80211_CHAN_WIDTH_10:
3872                 WARN_ON_ONCE(1);
3873                 /* keep c->width */
3874                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3875                 break;
3876         }
3877
3878         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3879
3880         return ret;
3881 }
3882
3883 /*
3884  * Returns true if smps_mode_new is strictly more restrictive than
3885  * smps_mode_old.
3886  */
3887 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3888                                    enum ieee80211_smps_mode smps_mode_new)
3889 {
3890         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3891                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3892                 return false;
3893
3894         switch (smps_mode_old) {
3895         case IEEE80211_SMPS_STATIC:
3896                 return false;
3897         case IEEE80211_SMPS_DYNAMIC:
3898                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3899         case IEEE80211_SMPS_OFF:
3900                 return smps_mode_new != IEEE80211_SMPS_OFF;
3901         default:
3902                 WARN_ON(1);
3903         }
3904
3905         return false;
3906 }
3907
3908 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3909                               struct cfg80211_csa_settings *csa_settings)
3910 {
3911         struct sk_buff *skb;
3912         struct ieee80211_mgmt *mgmt;
3913         struct ieee80211_local *local = sdata->local;
3914         int freq;
3915         int hdr_len = offsetofend(struct ieee80211_mgmt,
3916                                   u.action.u.chan_switch);
3917         u8 *pos;
3918
3919         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3920             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3921                 return -EOPNOTSUPP;
3922
3923         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3924                             5 + /* channel switch announcement element */
3925                             3 + /* secondary channel offset element */
3926                             5 + /* wide bandwidth channel switch announcement */
3927                             8); /* mesh channel switch parameters element */
3928         if (!skb)
3929                 return -ENOMEM;
3930
3931         skb_reserve(skb, local->tx_headroom);
3932         mgmt = skb_put_zero(skb, hdr_len);
3933         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3934                                           IEEE80211_STYPE_ACTION);
3935
3936         eth_broadcast_addr(mgmt->da);
3937         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3938         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3939                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3940         } else {
3941                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3942                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3943         }
3944         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3945         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3946         pos = skb_put(skb, 5);
3947         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3948         *pos++ = 3;                                             /* IE length */
3949         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3950         freq = csa_settings->chandef.chan->center_freq;
3951         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3952         *pos++ = csa_settings->count;                           /* count */
3953
3954         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3955                 enum nl80211_channel_type ch_type;
3956
3957                 skb_put(skb, 3);
3958                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3959                 *pos++ = 1;                                     /* IE length */
3960                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3961                 if (ch_type == NL80211_CHAN_HT40PLUS)
3962                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3963                 else
3964                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3965         }
3966
3967         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3968                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3969
3970                 skb_put(skb, 8);
3971                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3972                 *pos++ = 6;                                     /* IE length */
3973                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3974                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3975                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3976                 *pos++ |= csa_settings->block_tx ?
3977                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3978                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3979                 pos += 2;
3980                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3981                 pos += 2;
3982         }
3983
3984         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3985             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3986             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3987                 skb_put(skb, 5);
3988                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3989         }
3990
3991         ieee80211_tx_skb(sdata, skb);
3992         return 0;
3993 }
3994
3995 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3996 {
3997         return !(cs == NULL || cs->cipher == 0 ||
3998                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3999                  cs->hdr_len <= cs->key_idx_off ||
4000                  cs->key_idx_shift > 7 ||
4001                  cs->key_idx_mask == 0);
4002 }
4003
4004 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4005 {
4006         int i;
4007
4008         /* Ensure we have enough iftype bitmap space for all iftype values */
4009         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4010
4011         for (i = 0; i < n; i++)
4012                 if (!ieee80211_cs_valid(&cs[i]))
4013                         return false;
4014
4015         return true;
4016 }
4017
4018 const struct ieee80211_cipher_scheme *
4019 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4020                  enum nl80211_iftype iftype)
4021 {
4022         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4023         int n = local->hw.n_cipher_schemes;
4024         int i;
4025         const struct ieee80211_cipher_scheme *cs = NULL;
4026
4027         for (i = 0; i < n; i++) {
4028                 if (l[i].cipher == cipher) {
4029                         cs = &l[i];
4030                         break;
4031                 }
4032         }
4033
4034         if (!cs || !(cs->iftype & BIT(iftype)))
4035                 return NULL;
4036
4037         return cs;
4038 }
4039
4040 int ieee80211_cs_headroom(struct ieee80211_local *local,
4041                           struct cfg80211_crypto_settings *crypto,
4042                           enum nl80211_iftype iftype)
4043 {
4044         const struct ieee80211_cipher_scheme *cs;
4045         int headroom = IEEE80211_ENCRYPT_HEADROOM;
4046         int i;
4047
4048         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4049                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4050                                       iftype);
4051
4052                 if (cs && headroom < cs->hdr_len)
4053                         headroom = cs->hdr_len;
4054         }
4055
4056         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4057         if (cs && headroom < cs->hdr_len)
4058                 headroom = cs->hdr_len;
4059
4060         return headroom;
4061 }
4062
4063 static bool
4064 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4065 {
4066         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4067         int skip;
4068
4069         if (end > 0)
4070                 return false;
4071
4072         /* One shot NOA  */
4073         if (data->count[i] == 1)
4074                 return false;
4075
4076         if (data->desc[i].interval == 0)
4077                 return false;
4078
4079         /* End time is in the past, check for repetitions */
4080         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4081         if (data->count[i] < 255) {
4082                 if (data->count[i] <= skip) {
4083                         data->count[i] = 0;
4084                         return false;
4085                 }
4086
4087                 data->count[i] -= skip;
4088         }
4089
4090         data->desc[i].start += skip * data->desc[i].interval;
4091
4092         return true;
4093 }
4094
4095 static bool
4096 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4097                              s32 *offset)
4098 {
4099         bool ret = false;
4100         int i;
4101
4102         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4103                 s32 cur;
4104
4105                 if (!data->count[i])
4106                         continue;
4107
4108                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4109                         ret = true;
4110
4111                 cur = data->desc[i].start - tsf;
4112                 if (cur > *offset)
4113                         continue;
4114
4115                 cur = data->desc[i].start + data->desc[i].duration - tsf;
4116                 if (cur > *offset)
4117                         *offset = cur;
4118         }
4119
4120         return ret;
4121 }
4122
4123 static u32
4124 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4125 {
4126         s32 offset = 0;
4127         int tries = 0;
4128         /*
4129          * arbitrary limit, used to avoid infinite loops when combined NoA
4130          * descriptors cover the full time period.
4131          */
4132         int max_tries = 5;
4133
4134         ieee80211_extend_absent_time(data, tsf, &offset);
4135         do {
4136                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4137                         break;
4138
4139                 tries++;
4140         } while (tries < max_tries);
4141
4142         return offset;
4143 }
4144
4145 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4146 {
4147         u32 next_offset = BIT(31) - 1;
4148         int i;
4149
4150         data->absent = 0;
4151         data->has_next_tsf = false;
4152         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4153                 s32 start;
4154
4155                 if (!data->count[i])
4156                         continue;
4157
4158                 ieee80211_extend_noa_desc(data, tsf, i);
4159                 start = data->desc[i].start - tsf;
4160                 if (start <= 0)
4161                         data->absent |= BIT(i);
4162
4163                 if (next_offset > start)
4164                         next_offset = start;
4165
4166                 data->has_next_tsf = true;
4167         }
4168
4169         if (data->absent)
4170                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4171
4172         data->next_tsf = tsf + next_offset;
4173 }
4174 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4175
4176 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4177                             struct ieee80211_noa_data *data, u32 tsf)
4178 {
4179         int ret = 0;
4180         int i;
4181
4182         memset(data, 0, sizeof(*data));
4183
4184         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4185                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4186
4187                 if (!desc->count || !desc->duration)
4188                         continue;
4189
4190                 data->count[i] = desc->count;
4191                 data->desc[i].start = le32_to_cpu(desc->start_time);
4192                 data->desc[i].duration = le32_to_cpu(desc->duration);
4193                 data->desc[i].interval = le32_to_cpu(desc->interval);
4194
4195                 if (data->count[i] > 1 &&
4196                     data->desc[i].interval < data->desc[i].duration)
4197                         continue;
4198
4199                 ieee80211_extend_noa_desc(data, tsf, i);
4200                 ret++;
4201         }
4202
4203         if (ret)
4204                 ieee80211_update_p2p_noa(data, tsf);
4205
4206         return ret;
4207 }
4208 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4209
4210 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4211                            struct ieee80211_sub_if_data *sdata)
4212 {
4213         u64 tsf = drv_get_tsf(local, sdata);
4214         u64 dtim_count = 0;
4215         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4216         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4217         struct ps_data *ps;
4218         u8 bcns_from_dtim;
4219
4220         if (tsf == -1ULL || !beacon_int || !dtim_period)
4221                 return;
4222
4223         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4224             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4225                 if (!sdata->bss)
4226                         return;
4227
4228                 ps = &sdata->bss->ps;
4229         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4230                 ps = &sdata->u.mesh.ps;
4231         } else {
4232                 return;
4233         }
4234
4235         /*
4236          * actually finds last dtim_count, mac80211 will update in
4237          * __beacon_add_tim().
4238          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4239          */
4240         do_div(tsf, beacon_int);
4241         bcns_from_dtim = do_div(tsf, dtim_period);
4242         /* just had a DTIM */
4243         if (!bcns_from_dtim)
4244                 dtim_count = 0;
4245         else
4246                 dtim_count = dtim_period - bcns_from_dtim;
4247
4248         ps->dtim_count = dtim_count;
4249 }
4250
4251 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4252                                          struct ieee80211_chanctx *ctx)
4253 {
4254         struct ieee80211_sub_if_data *sdata;
4255         u8 radar_detect = 0;
4256
4257         lockdep_assert_held(&local->chanctx_mtx);
4258
4259         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4260                 return 0;
4261
4262         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4263                 if (sdata->reserved_radar_required)
4264                         radar_detect |= BIT(sdata->reserved_chandef.width);
4265
4266         /*
4267          * An in-place reservation context should not have any assigned vifs
4268          * until it replaces the other context.
4269          */
4270         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4271                 !list_empty(&ctx->assigned_vifs));
4272
4273         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4274                 if (sdata->radar_required)
4275                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4276
4277         return radar_detect;
4278 }
4279
4280 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4281                                  const struct cfg80211_chan_def *chandef,
4282                                  enum ieee80211_chanctx_mode chanmode,
4283                                  u8 radar_detect)
4284 {
4285         struct ieee80211_local *local = sdata->local;
4286         struct ieee80211_sub_if_data *sdata_iter;
4287         enum nl80211_iftype iftype = sdata->wdev.iftype;
4288         struct ieee80211_chanctx *ctx;
4289         int total = 1;
4290         struct iface_combination_params params = {
4291                 .radar_detect = radar_detect,
4292         };
4293
4294         lockdep_assert_held(&local->chanctx_mtx);
4295
4296         if (WARN_ON(hweight32(radar_detect) > 1))
4297                 return -EINVAL;
4298
4299         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4300                     !chandef->chan))
4301                 return -EINVAL;
4302
4303         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4304                 return -EINVAL;
4305
4306         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4307             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4308                 /*
4309                  * always passing this is harmless, since it'll be the
4310                  * same value that cfg80211 finds if it finds the same
4311                  * interface ... and that's always allowed
4312                  */
4313                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4314         }
4315
4316         /* Always allow software iftypes */
4317         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4318                 if (radar_detect)
4319                         return -EINVAL;
4320                 return 0;
4321         }
4322
4323         if (chandef)
4324                 params.num_different_channels = 1;
4325
4326         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4327                 params.iftype_num[iftype] = 1;
4328
4329         list_for_each_entry(ctx, &local->chanctx_list, list) {
4330                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4331                         continue;
4332                 params.radar_detect |=
4333                         ieee80211_chanctx_radar_detect(local, ctx);
4334                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4335                         params.num_different_channels++;
4336                         continue;
4337                 }
4338                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4339                     cfg80211_chandef_compatible(chandef,
4340                                                 &ctx->conf.def))
4341                         continue;
4342                 params.num_different_channels++;
4343         }
4344
4345         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4346                 struct wireless_dev *wdev_iter;
4347
4348                 wdev_iter = &sdata_iter->wdev;
4349
4350                 if (sdata_iter == sdata ||
4351                     !ieee80211_sdata_running(sdata_iter) ||
4352                     cfg80211_iftype_allowed(local->hw.wiphy,
4353                                             wdev_iter->iftype, 0, 1))
4354                         continue;
4355
4356                 params.iftype_num[wdev_iter->iftype]++;
4357                 total++;
4358         }
4359
4360         if (total == 1 && !params.radar_detect)
4361                 return 0;
4362
4363         return cfg80211_check_combinations(local->hw.wiphy, &params);
4364 }
4365
4366 static void
4367 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4368                          void *data)
4369 {
4370         u32 *max_num_different_channels = data;
4371
4372         *max_num_different_channels = max(*max_num_different_channels,
4373                                           c->num_different_channels);
4374 }
4375
4376 int ieee80211_max_num_channels(struct ieee80211_local *local)
4377 {
4378         struct ieee80211_sub_if_data *sdata;
4379         struct ieee80211_chanctx *ctx;
4380         u32 max_num_different_channels = 1;
4381         int err;
4382         struct iface_combination_params params = {0};
4383
4384         lockdep_assert_held(&local->chanctx_mtx);
4385
4386         list_for_each_entry(ctx, &local->chanctx_list, list) {
4387                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4388                         continue;
4389
4390                 params.num_different_channels++;
4391
4392                 params.radar_detect |=
4393                         ieee80211_chanctx_radar_detect(local, ctx);
4394         }
4395
4396         list_for_each_entry_rcu(sdata, &local->interfaces, list)
4397                 params.iftype_num[sdata->wdev.iftype]++;
4398
4399         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4400                                          ieee80211_iter_max_chans,
4401                                          &max_num_different_channels);
4402         if (err < 0)
4403                 return err;
4404
4405         return max_num_different_channels;
4406 }
4407
4408 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4409                                 struct ieee80211_sta_s1g_cap *caps,
4410                                 struct sk_buff *skb)
4411 {
4412         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4413         struct ieee80211_s1g_cap s1g_capab;
4414         u8 *pos;
4415         int i;
4416
4417         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4418                 return;
4419
4420         if (!caps->s1g)
4421                 return;
4422
4423         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4424         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4425
4426         /* override the capability info */
4427         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4428                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4429
4430                 s1g_capab.capab_info[i] &= ~mask;
4431                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4432         }
4433
4434         /* then MCS and NSS set */
4435         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4436                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4437
4438                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4439                 s1g_capab.supp_mcs_nss[i] |=
4440                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4441         }
4442
4443         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4444         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4445         *pos++ = sizeof(s1g_capab);
4446
4447         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4448 }
4449
4450 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4451                                   struct sk_buff *skb)
4452 {
4453         u8 *pos = skb_put(skb, 3);
4454
4455         *pos++ = WLAN_EID_AID_REQUEST;
4456         *pos++ = 1;
4457         *pos++ = 0;
4458 }
4459
4460 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4461 {
4462         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4463         *buf++ = 7; /* len */
4464         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4465         *buf++ = 0x50;
4466         *buf++ = 0xf2;
4467         *buf++ = 2; /* WME */
4468         *buf++ = 0; /* WME info */
4469         *buf++ = 1; /* WME ver */
4470         *buf++ = qosinfo; /* U-APSD no in use */
4471
4472         return buf;
4473 }
4474
4475 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4476                              unsigned long *frame_cnt,
4477                              unsigned long *byte_cnt)
4478 {
4479         struct txq_info *txqi = to_txq_info(txq);
4480         u32 frag_cnt = 0, frag_bytes = 0;
4481         struct sk_buff *skb;
4482
4483         skb_queue_walk(&txqi->frags, skb) {
4484                 frag_cnt++;
4485                 frag_bytes += skb->len;
4486         }
4487
4488         if (frame_cnt)
4489                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4490
4491         if (byte_cnt)
4492                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4493 }
4494 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4495
4496 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4497         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4498         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4499         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4500         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4501 };
4502
4503 u16 ieee80211_encode_usf(int listen_interval)
4504 {
4505         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4506         u16 ui, usf = 0;
4507
4508         /* find greatest USF */
4509         while (usf < IEEE80211_MAX_USF) {
4510                 if (listen_interval % listen_int_usf[usf + 1])
4511                         break;
4512                 usf += 1;
4513         }
4514         ui = listen_interval / listen_int_usf[usf];
4515
4516         /* error if there is a remainder. Should've been checked by user */
4517         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4518         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4519                           FIELD_PREP(LISTEN_INT_UI, ui);
4520
4521         return (u16) listen_interval;
4522 }