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) 2018-2019 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 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
  49 {
  50         struct sk_buff *skb;
  51         struct ieee80211_hdr *hdr;
  52
  53         skb_queue_walk(&tx->skbs, skb) {
  54                 hdr = (struct ieee80211_hdr *) skb->data;
  55                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
  56         }
  57 }
  58
  59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
  60                              int rate, int erp, int short_preamble,
  61                              int shift)
  62 {
  63         int dur;
  64
  65         /* calculate duration (in microseconds, rounded up to next higher
  66          * integer if it includes a fractional microsecond) to send frame of
  67          * len bytes (does not include FCS) at the given rate. Duration will
  68          * also include SIFS.
  69          *
  70          * rate is in 100 kbps, so divident is multiplied by 10 in the
  71          * DIV_ROUND_UP() operations.
  72          *
  73          * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
  74          * is assumed to be 0 otherwise.
  75          */
  76
  77         if (band == NL80211_BAND_5GHZ || erp) {
  78                 /*
  79                  * OFDM:
  80                  *
  81                  * N_DBPS = DATARATE x 4
  82                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
  83                  *      (16 = SIGNAL time, 6 = tail bits)
  84                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
  85                  *
  86                  * T_SYM = 4 usec
  87                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
  88                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
  89                  *      signal ext = 6 usec
  90                  */
  91                 dur = 16; /* SIFS + signal ext */
  92                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
  93                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
  94
  95                 /* IEEE 802.11-2012 18.3.2.4: all values above are:
  96                  *  * times 4 for 5 MHz
  97                  *  * times 2 for 10 MHz
  98                  */
  99                 dur *= 1 << shift;
 100
 101                 /* rates should already consider the channel bandwidth,
 102                  * don't apply divisor again.
 103                  */
 104                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 105                                         4 * rate); /* T_SYM x N_SYM */
 106         } else {
 107                 /*
 108                  * 802.11b or 802.11g with 802.11b compatibility:
 109                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 110                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 111                  *
 112                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 113                  * aSIFSTime = 10 usec
 114                  * aPreambleLength = 144 usec or 72 usec with short preamble
 115                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 116                  */
 117                 dur = 10; /* aSIFSTime = 10 usec */
 118                 dur += short_preamble ? (72 + 24) : (144 + 48);
 119
 120                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 121         }
 122
 123         return dur;
 124 }
 125
 126 /* Exported duration function for driver use */
 127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 128                                         struct ieee80211_vif *vif,
 129                                         enum nl80211_band band,
 130                                         size_t frame_len,
 131                                         struct ieee80211_rate *rate)
 132 {
 133         struct ieee80211_sub_if_data *sdata;
 134         u16 dur;
 135         int erp, shift = 0;
 136         bool short_preamble = false;
 137
 138         erp = 0;
 139         if (vif) {
 140                 sdata = vif_to_sdata(vif);
 141                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 142                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 143                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 144                 shift = ieee80211_vif_get_shift(vif);
 145         }
 146
 147         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 148                                        short_preamble, shift);
 149
 150         return cpu_to_le16(dur);
 151 }
 152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 153
 154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 155                               struct ieee80211_vif *vif, size_t frame_len,
 156                               const struct ieee80211_tx_info *frame_txctl)
 157 {
 158         struct ieee80211_local *local = hw_to_local(hw);
 159         struct ieee80211_rate *rate;
 160         struct ieee80211_sub_if_data *sdata;
 161         bool short_preamble;
 162         int erp, shift = 0, bitrate;
 163         u16 dur;
 164         struct ieee80211_supported_band *sband;
 165
 166         sband = local->hw.wiphy->bands[frame_txctl->band];
 167
 168         short_preamble = false;
 169
 170         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 171
 172         erp = 0;
 173         if (vif) {
 174                 sdata = vif_to_sdata(vif);
 175                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 176                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 177                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 178                 shift = ieee80211_vif_get_shift(vif);
 179         }
 180
 181         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 182
 183         /* CTS duration */
 184         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 185                                        erp, short_preamble, shift);
 186         /* Data frame duration */
 187         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 188                                         erp, short_preamble, shift);
 189         /* ACK duration */
 190         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 191                                         erp, short_preamble, shift);
 192
 193         return cpu_to_le16(dur);
 194 }
 195 EXPORT_SYMBOL(ieee80211_rts_duration);
 196
 197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 198                                     struct ieee80211_vif *vif,
 199                                     size_t frame_len,
 200                                     const struct ieee80211_tx_info *frame_txctl)
 201 {
 202         struct ieee80211_local *local = hw_to_local(hw);
 203         struct ieee80211_rate *rate;
 204         struct ieee80211_sub_if_data *sdata;
 205         bool short_preamble;
 206         int erp, shift = 0, bitrate;
 207         u16 dur;
 208         struct ieee80211_supported_band *sband;
 209
 210         sband = local->hw.wiphy->bands[frame_txctl->band];
 211
 212         short_preamble = false;
 213
 214         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 215         erp = 0;
 216         if (vif) {
 217                 sdata = vif_to_sdata(vif);
 218                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 219                 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
 220                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 221                 shift = ieee80211_vif_get_shift(vif);
 222         }
 223
 224         bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
 225
 226         /* Data frame duration */
 227         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 228                                        erp, short_preamble, shift);
 229         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 230                 /* ACK duration */
 231                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 232                                                 erp, short_preamble, shift);
 233         }
 234
 235         return cpu_to_le16(dur);
 236 }
 237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 238
 239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 240 {
 241         struct ieee80211_local *local = sdata->local;
 242         struct ieee80211_vif *vif = &sdata->vif;
 243         struct fq *fq = &local->fq;
 244         struct ps_data *ps = NULL;
 245         struct txq_info *txqi;
 246         struct sta_info *sta;
 247         int i;
 248
 249         local_bh_disable();
 250         spin_lock(&fq->lock);
 251
 252         if (sdata->vif.type == NL80211_IFTYPE_AP)
 253                 ps = &sdata->bss->ps;
 254
 255         sdata->vif.txqs_stopped[ac] = false;
 256
 257         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 258                 if (sdata != sta->sdata)
 259                         continue;
 260
 261                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 262                         struct ieee80211_txq *txq = sta->sta.txq[i];
 263
 264                         if (!txq)
 265                                 continue;
 266
 267                         txqi = to_txq_info(txq);
 268
 269                         if (ac != txq->ac)
 270                                 continue;
 271
 272                         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
 273                                                 &txqi->flags))
 274                                 continue;
 275
 276                         spin_unlock(&fq->lock);
 277                         drv_wake_tx_queue(local, txqi);
 278                         spin_lock(&fq->lock);
 279                 }
 280         }
 281
 282         if (!vif->txq)
 283                 goto out;
 284
 285         txqi = to_txq_info(vif->txq);
 286
 287         if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
 288             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 289                 goto out;
 290
 291         spin_unlock(&fq->lock);
 292
 293         drv_wake_tx_queue(local, txqi);
 294         local_bh_enable();
 295         return;
 296 out:
 297         spin_unlock(&fq->lock);
 298         local_bh_enable();
 299 }
 300
 301 static void
 302 __releases(&local->queue_stop_reason_lock)
 303 __acquires(&local->queue_stop_reason_lock)
 304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 305 {
 306         struct ieee80211_sub_if_data *sdata;
 307         int n_acs = IEEE80211_NUM_ACS;
 308         int i;
 309
 310         rcu_read_lock();
 311
 312         if (local->hw.queues < IEEE80211_NUM_ACS)
 313                 n_acs = 1;
 314
 315         for (i = 0; i < local->hw.queues; i++) {
 316                 if (local->queue_stop_reasons[i])
 317                         continue;
 318
 319                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 320                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 321                         int ac;
 322
 323                         for (ac = 0; ac < n_acs; ac++) {
 324                                 int ac_queue = sdata->vif.hw_queue[ac];
 325
 326                                 if (ac_queue == i ||
 327                                     sdata->vif.cab_queue == i)
 328                                         __ieee80211_wake_txqs(sdata, ac);
 329                         }
 330                 }
 331                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 332         }
 333
 334         rcu_read_unlock();
 335 }
 336
 337 void ieee80211_wake_txqs(unsigned long data)
 338 {
 339         struct ieee80211_local *local = (struct ieee80211_local *)data;
 340         unsigned long flags;
 341
 342         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 343         _ieee80211_wake_txqs(local, &flags);
 344         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 345 }
 346
 347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
 348 {
 349         struct ieee80211_sub_if_data *sdata;
 350         int n_acs = IEEE80211_NUM_ACS;
 351
 352         if (local->ops->wake_tx_queue)
 353                 return;
 354
 355         if (local->hw.queues < IEEE80211_NUM_ACS)
 356                 n_acs = 1;
 357
 358         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 359                 int ac;
 360
 361                 if (!sdata->dev)
 362                         continue;
 363
 364                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
 365                     local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
 366                         continue;
 367
 368                 for (ac = 0; ac < n_acs; ac++) {
 369                         int ac_queue = sdata->vif.hw_queue[ac];
 370
 371                         if (ac_queue == queue ||
 372                             (sdata->vif.cab_queue == queue &&
 373                              local->queue_stop_reasons[ac_queue] == 0 &&
 374                              skb_queue_empty(&local->pending[ac_queue])))
 375                                 netif_wake_subqueue(sdata->dev, ac);
 376                 }
 377         }
 378 }
 379
 380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 381                                    enum queue_stop_reason reason,
 382                                    bool refcounted,
 383                                    unsigned long *flags)
 384 {
 385         struct ieee80211_local *local = hw_to_local(hw);
 386
 387         trace_wake_queue(local, queue, reason);
 388
 389         if (WARN_ON(queue >= hw->queues))
 390                 return;
 391
 392         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 393                 return;
 394
 395         if (!refcounted) {
 396                 local->q_stop_reasons[queue][reason] = 0;
 397         } else {
 398                 local->q_stop_reasons[queue][reason]--;
 399                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 400                         local->q_stop_reasons[queue][reason] = 0;
 401         }
 402
 403         if (local->q_stop_reasons[queue][reason] == 0)
 404                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 405
 406         if (local->queue_stop_reasons[queue] != 0)
 407                 /* someone still has this queue stopped */
 408                 return;
 409
 410         if (skb_queue_empty(&local->pending[queue])) {
 411                 rcu_read_lock();
 412                 ieee80211_propagate_queue_wake(local, queue);
 413                 rcu_read_unlock();
 414         } else
 415                 tasklet_schedule(&local->tx_pending_tasklet);
 416
 417         /*
 418          * Calling _ieee80211_wake_txqs here can be a problem because it may
 419          * release queue_stop_reason_lock which has been taken by
 420          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 421          * release someone's lock, but it is fine because all the callers of
 422          * __ieee80211_wake_queue call it right before releasing the lock.
 423          */
 424         if (local->ops->wake_tx_queue) {
 425                 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 426                         tasklet_schedule(&local->wake_txqs_tasklet);
 427                 else
 428                         _ieee80211_wake_txqs(local, flags);
 429         }
 430 }
 431
 432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 433                                     enum queue_stop_reason reason,
 434                                     bool refcounted)
 435 {
 436         struct ieee80211_local *local = hw_to_local(hw);
 437         unsigned long flags;
 438
 439         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 440         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 441         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 442 }
 443
 444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 445 {
 446         ieee80211_wake_queue_by_reason(hw, queue,
 447                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 448                                        false);
 449 }
 450 EXPORT_SYMBOL(ieee80211_wake_queue);
 451
 452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 453                                    enum queue_stop_reason reason,
 454                                    bool refcounted)
 455 {
 456         struct ieee80211_local *local = hw_to_local(hw);
 457         struct ieee80211_sub_if_data *sdata;
 458         int n_acs = IEEE80211_NUM_ACS;
 459
 460         trace_stop_queue(local, queue, reason);
 461
 462         if (WARN_ON(queue >= hw->queues))
 463                 return;
 464
 465         if (!refcounted)
 466                 local->q_stop_reasons[queue][reason] = 1;
 467         else
 468                 local->q_stop_reasons[queue][reason]++;
 469
 470         if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
 471                 return;
 472
 473         if (local->hw.queues < IEEE80211_NUM_ACS)
 474                 n_acs = 1;
 475
 476         rcu_read_lock();
 477         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 478                 int ac;
 479
 480                 if (!sdata->dev)
 481                         continue;
 482
 483                 for (ac = 0; ac < n_acs; ac++) {
 484                         if (sdata->vif.hw_queue[ac] == queue ||
 485                             sdata->vif.cab_queue == queue) {
 486                                 if (!local->ops->wake_tx_queue) {
 487                                         netif_stop_subqueue(sdata->dev, ac);
 488                                         continue;
 489                                 }
 490                                 spin_lock(&local->fq.lock);
 491                                 sdata->vif.txqs_stopped[ac] = true;
 492                                 spin_unlock(&local->fq.lock);
 493                         }
 494                 }
 495         }
 496         rcu_read_unlock();
 497 }
 498
 499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 500                                     enum queue_stop_reason reason,
 501                                     bool refcounted)
 502 {
 503         struct ieee80211_local *local = hw_to_local(hw);
 504         unsigned long flags;
 505
 506         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 507         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 508         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 509 }
 510
 511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 512 {
 513         ieee80211_stop_queue_by_reason(hw, queue,
 514                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 515                                        false);
 516 }
 517 EXPORT_SYMBOL(ieee80211_stop_queue);
 518
 519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 520                                struct sk_buff *skb)
 521 {
 522         struct ieee80211_hw *hw = &local->hw;
 523         unsigned long flags;
 524         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 525         int queue = info->hw_queue;
 526
 527         if (WARN_ON(!info->control.vif)) {
 528                 ieee80211_free_txskb(&local->hw, skb);
 529                 return;
 530         }
 531
 532         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 533         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 534                                false);
 535         __skb_queue_tail(&local->pending[queue], skb);
 536         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 537                                false, &flags);
 538         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 539 }
 540
 541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 542                                 struct sk_buff_head *skbs)
 543 {
 544         struct ieee80211_hw *hw = &local->hw;
 545         struct sk_buff *skb;
 546         unsigned long flags;
 547         int queue, i;
 548
 549         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 550         while ((skb = skb_dequeue(skbs))) {
 551                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 552
 553                 if (WARN_ON(!info->control.vif)) {
 554                         ieee80211_free_txskb(&local->hw, skb);
 555                         continue;
 556                 }
 557
 558                 queue = info->hw_queue;
 559
 560                 __ieee80211_stop_queue(hw, queue,
 561                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 562                                 false);
 563
 564                 __skb_queue_tail(&local->pending[queue], skb);
 565         }
 566
 567         for (i = 0; i < hw->queues; i++)
 568                 __ieee80211_wake_queue(hw, i,
 569                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 570                         false, &flags);
 571         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 572 }
 573
 574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 575                                      unsigned long queues,
 576                                      enum queue_stop_reason reason,
 577                                      bool refcounted)
 578 {
 579         struct ieee80211_local *local = hw_to_local(hw);
 580         unsigned long flags;
 581         int i;
 582
 583         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 584
 585         for_each_set_bit(i, &queues, hw->queues)
 586                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 587
 588         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 589 }
 590
 591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 592 {
 593         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 594                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 595                                         false);
 596 }
 597 EXPORT_SYMBOL(ieee80211_stop_queues);
 598
 599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 600 {
 601         struct ieee80211_local *local = hw_to_local(hw);
 602         unsigned long flags;
 603         int ret;
 604
 605         if (WARN_ON(queue >= hw->queues))
 606                 return true;
 607
 608         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 609         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 610                        &local->queue_stop_reasons[queue]);
 611         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 612         return ret;
 613 }
 614 EXPORT_SYMBOL(ieee80211_queue_stopped);
 615
 616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 617                                      unsigned long queues,
 618                                      enum queue_stop_reason reason,
 619                                      bool refcounted)
 620 {
 621         struct ieee80211_local *local = hw_to_local(hw);
 622         unsigned long flags;
 623         int i;
 624
 625         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 626
 627         for_each_set_bit(i, &queues, hw->queues)
 628                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 629
 630         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 631 }
 632
 633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 634 {
 635         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 636                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 637                                         false);
 638 }
 639 EXPORT_SYMBOL(ieee80211_wake_queues);
 640
 641 static unsigned int
 642 ieee80211_get_vif_queues(struct ieee80211_local *local,
 643                          struct ieee80211_sub_if_data *sdata)
 644 {
 645         unsigned int queues;
 646
 647         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 648                 int ac;
 649
 650                 queues = 0;
 651
 652                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 653                         queues |= BIT(sdata->vif.hw_queue[ac]);
 654                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 655                         queues |= BIT(sdata->vif.cab_queue);
 656         } else {
 657                 /* all queues */
 658                 queues = BIT(local->hw.queues) - 1;
 659         }
 660
 661         return queues;
 662 }
 663
 664 void __ieee80211_flush_queues(struct ieee80211_local *local,
 665                               struct ieee80211_sub_if_data *sdata,
 666                               unsigned int queues, bool drop)
 667 {
 668         if (!local->ops->flush)
 669                 return;
 670
 671         /*
 672          * If no queue was set, or if the HW doesn't support
 673          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 674          */
 675         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 676                 queues = ieee80211_get_vif_queues(local, sdata);
 677
 678         ieee80211_stop_queues_by_reason(&local->hw, queues,
 679                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 680                                         false);
 681
 682         drv_flush(local, sdata, queues, drop);
 683
 684         ieee80211_wake_queues_by_reason(&local->hw, queues,
 685                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 686                                         false);
 687 }
 688
 689 void ieee80211_flush_queues(struct ieee80211_local *local,
 690                             struct ieee80211_sub_if_data *sdata, bool drop)
 691 {
 692         __ieee80211_flush_queues(local, sdata, 0, drop);
 693 }
 694
 695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
 696                                struct ieee80211_sub_if_data *sdata,
 697                                enum queue_stop_reason reason)
 698 {
 699         ieee80211_stop_queues_by_reason(&local->hw,
 700                                         ieee80211_get_vif_queues(local, sdata),
 701                                         reason, true);
 702 }
 703
 704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
 705                                struct ieee80211_sub_if_data *sdata,
 706                                enum queue_stop_reason reason)
 707 {
 708         ieee80211_wake_queues_by_reason(&local->hw,
 709                                         ieee80211_get_vif_queues(local, sdata),
 710                                         reason, true);
 711 }
 712
 713 static void __iterate_interfaces(struct ieee80211_local *local,
 714                                  u32 iter_flags,
 715                                  void (*iterator)(void *data, u8 *mac,
 716                                                   struct ieee80211_vif *vif),
 717                                  void *data)
 718 {
 719         struct ieee80211_sub_if_data *sdata;
 720         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 721
 722         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 723                 switch (sdata->vif.type) {
 724                 case NL80211_IFTYPE_MONITOR:
 725                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
 726                                 continue;
 727                         break;
 728                 case NL80211_IFTYPE_AP_VLAN:
 729                         continue;
 730                 default:
 731                         break;
 732                 }
 733                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 734                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 735                         continue;
 736                 if (ieee80211_sdata_running(sdata) || !active_only)
 737                         iterator(data, sdata->vif.addr,
 738                                  &sdata->vif);
 739         }
 740
 741         sdata = rcu_dereference_check(local->monitor_sdata,
 742                                       lockdep_is_held(&local->iflist_mtx) ||
 743                                       lockdep_rtnl_is_held());
 744         if (sdata &&
 745             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 746              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 747                 iterator(data, sdata->vif.addr, &sdata->vif);
 748 }
 749
 750 void ieee80211_iterate_interfaces(
 751         struct ieee80211_hw *hw, u32 iter_flags,
 752         void (*iterator)(void *data, u8 *mac,
 753                          struct ieee80211_vif *vif),
 754         void *data)
 755 {
 756         struct ieee80211_local *local = hw_to_local(hw);
 757
 758         mutex_lock(&local->iflist_mtx);
 759         __iterate_interfaces(local, iter_flags, iterator, data);
 760         mutex_unlock(&local->iflist_mtx);
 761 }
 762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 763
 764 void ieee80211_iterate_active_interfaces_atomic(
 765         struct ieee80211_hw *hw, u32 iter_flags,
 766         void (*iterator)(void *data, u8 *mac,
 767                          struct ieee80211_vif *vif),
 768         void *data)
 769 {
 770         struct ieee80211_local *local = hw_to_local(hw);
 771
 772         rcu_read_lock();
 773         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 774                              iterator, data);
 775         rcu_read_unlock();
 776 }
 777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 778
 779 void ieee80211_iterate_active_interfaces_rtnl(
 780         struct ieee80211_hw *hw, u32 iter_flags,
 781         void (*iterator)(void *data, u8 *mac,
 782                          struct ieee80211_vif *vif),
 783         void *data)
 784 {
 785         struct ieee80211_local *local = hw_to_local(hw);
 786
 787         ASSERT_RTNL();
 788
 789         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 790                              iterator, data);
 791 }
 792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
 793
 794 static void __iterate_stations(struct ieee80211_local *local,
 795                                void (*iterator)(void *data,
 796                                                 struct ieee80211_sta *sta),
 797                                void *data)
 798 {
 799         struct sta_info *sta;
 800
 801         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 802                 if (!sta->uploaded)
 803                         continue;
 804
 805                 iterator(data, &sta->sta);
 806         }
 807 }
 808
 809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 810                         void (*iterator)(void *data,
 811                                          struct ieee80211_sta *sta),
 812                         void *data)
 813 {
 814         struct ieee80211_local *local = hw_to_local(hw);
 815
 816         rcu_read_lock();
 817         __iterate_stations(local, iterator, data);
 818         rcu_read_unlock();
 819 }
 820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 821
 822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 823 {
 824         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 825
 826         if (!ieee80211_sdata_running(sdata) ||
 827             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 828                 return NULL;
 829         return &sdata->vif;
 830 }
 831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 832
 833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 834 {
 835         struct ieee80211_sub_if_data *sdata;
 836
 837         if (!vif)
 838                 return NULL;
 839
 840         sdata = vif_to_sdata(vif);
 841
 842         if (!ieee80211_sdata_running(sdata) ||
 843             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 844                 return NULL;
 845
 846         return &sdata->wdev;
 847 }
 848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 849
 850 /*
 851  * Nothing should have been stuffed into the workqueue during
 852  * the suspend->resume cycle. Since we can't check each caller
 853  * of this function if we are already quiescing / suspended,
 854  * check here and don't WARN since this can actually happen when
 855  * the rx path (for example) is racing against __ieee80211_suspend
 856  * and suspending / quiescing was set after the rx path checked
 857  * them.
 858  */
 859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 860 {
 861         if (local->quiescing || (local->suspended && !local->resuming)) {
 862                 pr_warn("queueing ieee80211 work while going to suspend\n");
 863                 return false;
 864         }
 865
 866         return true;
 867 }
 868
 869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 870 {
 871         struct ieee80211_local *local = hw_to_local(hw);
 872
 873         if (!ieee80211_can_queue_work(local))
 874                 return;
 875
 876         queue_work(local->workqueue, work);
 877 }
 878 EXPORT_SYMBOL(ieee80211_queue_work);
 879
 880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 881                                   struct delayed_work *dwork,
 882                                   unsigned long delay)
 883 {
 884         struct ieee80211_local *local = hw_to_local(hw);
 885
 886         if (!ieee80211_can_queue_work(local))
 887                 return;
 888
 889         queue_delayed_work(local->workqueue, dwork, delay);
 890 }
 891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 892
 893 static void ieee80211_parse_extension_element(u32 *crc,
 894                                               const struct element *elem,
 895                                               struct ieee802_11_elems *elems)
 896 {
 897         const void *data = elem->data + 1;
 898         u8 len = elem->datalen - 1;
 899
 900         switch (elem->data[0]) {
 901         case WLAN_EID_EXT_HE_MU_EDCA:
 902                 if (len == sizeof(*elems->mu_edca_param_set)) {
 903                         elems->mu_edca_param_set = data;
 904                         if (crc)
 905                                 *crc = crc32_be(*crc, (void *)elem,
 906                                                 elem->datalen + 2);
 907                 }
 908                 break;
 909         case WLAN_EID_EXT_HE_CAPABILITY:
 910                 elems->he_cap = data;
 911                 elems->he_cap_len = len;
 912                 break;
 913         case WLAN_EID_EXT_HE_OPERATION:
 914                 if (len >= sizeof(*elems->he_operation) &&
 915                     len == ieee80211_he_oper_size(data) - 1)
 916                         elems->he_operation = data;
 917                 break;
 918         case WLAN_EID_EXT_UORA:
 919                 if (len == 1)
 920                         elems->uora_element = data;
 921                 break;
 922         case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
 923                 if (len == 3)
 924                         elems->max_channel_switch_time = data;
 925                 break;
 926         case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
 927                 if (len == sizeof(*elems->mbssid_config_ie))
 928                         elems->mbssid_config_ie = data;
 929                 break;
 930         case WLAN_EID_EXT_HE_SPR:
 931                 if (len >= sizeof(*elems->he_spr) &&
 932                     len >= ieee80211_he_spr_size(data))
 933                         elems->he_spr = data;
 934                 break;
 935         }
 936 }
 937
 938 static u32
 939 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 940                             struct ieee802_11_elems *elems,
 941                             u64 filter, u32 crc,
 942                             const struct element *check_inherit)
 943 {
 944         const struct element *elem;
 945         bool calc_crc = filter != 0;
 946         DECLARE_BITMAP(seen_elems, 256);
 947         const u8 *ie;
 948
 949         bitmap_zero(seen_elems, 256);
 950
 951         for_each_element(elem, start, len) {
 952                 bool elem_parse_failed;
 953                 u8 id = elem->id;
 954                 u8 elen = elem->datalen;
 955                 const u8 *pos = elem->data;
 956
 957                 if (check_inherit &&
 958                     !cfg80211_is_element_inherited(elem,
 959                                                    check_inherit))
 960                         continue;
 961
 962                 switch (id) {
 963                 case WLAN_EID_SSID:
 964                 case WLAN_EID_SUPP_RATES:
 965                 case WLAN_EID_FH_PARAMS:
 966                 case WLAN_EID_DS_PARAMS:
 967                 case WLAN_EID_CF_PARAMS:
 968                 case WLAN_EID_TIM:
 969                 case WLAN_EID_IBSS_PARAMS:
 970                 case WLAN_EID_CHALLENGE:
 971                 case WLAN_EID_RSN:
 972                 case WLAN_EID_ERP_INFO:
 973                 case WLAN_EID_EXT_SUPP_RATES:
 974                 case WLAN_EID_HT_CAPABILITY:
 975                 case WLAN_EID_HT_OPERATION:
 976                 case WLAN_EID_VHT_CAPABILITY:
 977                 case WLAN_EID_VHT_OPERATION:
 978                 case WLAN_EID_MESH_ID:
 979                 case WLAN_EID_MESH_CONFIG:
 980                 case WLAN_EID_PEER_MGMT:
 981                 case WLAN_EID_PREQ:
 982                 case WLAN_EID_PREP:
 983                 case WLAN_EID_PERR:
 984                 case WLAN_EID_RANN:
 985                 case WLAN_EID_CHANNEL_SWITCH:
 986                 case WLAN_EID_EXT_CHANSWITCH_ANN:
 987                 case WLAN_EID_COUNTRY:
 988                 case WLAN_EID_PWR_CONSTRAINT:
 989                 case WLAN_EID_TIMEOUT_INTERVAL:
 990                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
 991                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
 992                 case WLAN_EID_CHAN_SWITCH_PARAM:
 993                 case WLAN_EID_EXT_CAPABILITY:
 994                 case WLAN_EID_CHAN_SWITCH_TIMING:
 995                 case WLAN_EID_LINK_ID:
 996                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
 997                 /*
 998                  * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
 999                  * that if the content gets bigger it might be needed more than once
1000                  */
1001                         if (test_bit(id, seen_elems)) {
1002                                 elems->parse_error = true;
1003                                 continue;
1004                         }
1005                         break;
1006                 }
1007
1008                 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1009                         crc = crc32_be(crc, pos - 2, elen + 2);
1010
1011                 elem_parse_failed = false;
1012
1013                 switch (id) {
1014                 case WLAN_EID_LINK_ID:
1015                         if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1016                                 elem_parse_failed = true;
1017                                 break;
1018                         }
1019                         elems->lnk_id = (void *)(pos - 2);
1020                         break;
1021                 case WLAN_EID_CHAN_SWITCH_TIMING:
1022                         if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1023                                 elem_parse_failed = true;
1024                                 break;
1025                         }
1026                         elems->ch_sw_timing = (void *)pos;
1027                         break;
1028                 case WLAN_EID_EXT_CAPABILITY:
1029                         elems->ext_capab = pos;
1030                         elems->ext_capab_len = elen;
1031                         break;
1032                 case WLAN_EID_SSID:
1033                         elems->ssid = pos;
1034                         elems->ssid_len = elen;
1035                         break;
1036                 case WLAN_EID_SUPP_RATES:
1037                         elems->supp_rates = pos;
1038                         elems->supp_rates_len = elen;
1039                         break;
1040                 case WLAN_EID_DS_PARAMS:
1041                         if (elen >= 1)
1042                                 elems->ds_params = pos;
1043                         else
1044                                 elem_parse_failed = true;
1045                         break;
1046                 case WLAN_EID_TIM:
1047                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
1048                                 elems->tim = (void *)pos;
1049                                 elems->tim_len = elen;
1050                         } else
1051                                 elem_parse_failed = true;
1052                         break;
1053                 case WLAN_EID_CHALLENGE:
1054                         elems->challenge = pos;
1055                         elems->challenge_len = elen;
1056                         break;
1057                 case WLAN_EID_VENDOR_SPECIFIC:
1058                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1059                             pos[2] == 0xf2) {
1060                                 /* Microsoft OUI (00:50:F2) */
1061
1062                                 if (calc_crc)
1063                                         crc = crc32_be(crc, pos - 2, elen + 2);
1064
1065                                 if (elen >= 5 && pos[3] == 2) {
1066                                         /* OUI Type 2 - WMM IE */
1067                                         if (pos[4] == 0) {
1068                                                 elems->wmm_info = pos;
1069                                                 elems->wmm_info_len = elen;
1070                                         } else if (pos[4] == 1) {
1071                                                 elems->wmm_param = pos;
1072                                                 elems->wmm_param_len = elen;
1073                                         }
1074                                 }
1075                         }
1076                         break;
1077                 case WLAN_EID_RSN:
1078                         elems->rsn = pos;
1079                         elems->rsn_len = elen;
1080                         break;
1081                 case WLAN_EID_ERP_INFO:
1082                         if (elen >= 1)
1083                                 elems->erp_info = pos;
1084                         else
1085                                 elem_parse_failed = true;
1086                         break;
1087                 case WLAN_EID_EXT_SUPP_RATES:
1088                         elems->ext_supp_rates = pos;
1089                         elems->ext_supp_rates_len = elen;
1090                         break;
1091                 case WLAN_EID_HT_CAPABILITY:
1092                         if (elen >= sizeof(struct ieee80211_ht_cap))
1093                                 elems->ht_cap_elem = (void *)pos;
1094                         else
1095                                 elem_parse_failed = true;
1096                         break;
1097                 case WLAN_EID_HT_OPERATION:
1098                         if (elen >= sizeof(struct ieee80211_ht_operation))
1099                                 elems->ht_operation = (void *)pos;
1100                         else
1101                                 elem_parse_failed = true;
1102                         break;
1103                 case WLAN_EID_VHT_CAPABILITY:
1104                         if (elen >= sizeof(struct ieee80211_vht_cap))
1105                                 elems->vht_cap_elem = (void *)pos;
1106                         else
1107                                 elem_parse_failed = true;
1108                         break;
1109                 case WLAN_EID_VHT_OPERATION:
1110                         if (elen >= sizeof(struct ieee80211_vht_operation))
1111                                 elems->vht_operation = (void *)pos;
1112                         else
1113                                 elem_parse_failed = true;
1114                         break;
1115                 case WLAN_EID_OPMODE_NOTIF:
1116                         if (elen > 0)
1117                                 elems->opmode_notif = pos;
1118                         else
1119                                 elem_parse_failed = true;
1120                         break;
1121                 case WLAN_EID_MESH_ID:
1122                         elems->mesh_id = pos;
1123                         elems->mesh_id_len = elen;
1124                         break;
1125                 case WLAN_EID_MESH_CONFIG:
1126                         if (elen >= sizeof(struct ieee80211_meshconf_ie))
1127                                 elems->mesh_config = (void *)pos;
1128                         else
1129                                 elem_parse_failed = true;
1130                         break;
1131                 case WLAN_EID_PEER_MGMT:
1132                         elems->peering = pos;
1133                         elems->peering_len = elen;
1134                         break;
1135                 case WLAN_EID_MESH_AWAKE_WINDOW:
1136                         if (elen >= 2)
1137                                 elems->awake_window = (void *)pos;
1138                         break;
1139                 case WLAN_EID_PREQ:
1140                         elems->preq = pos;
1141                         elems->preq_len = elen;
1142                         break;
1143                 case WLAN_EID_PREP:
1144                         elems->prep = pos;
1145                         elems->prep_len = elen;
1146                         break;
1147                 case WLAN_EID_PERR:
1148                         elems->perr = pos;
1149                         elems->perr_len = elen;
1150                         break;
1151                 case WLAN_EID_RANN:
1152                         if (elen >= sizeof(struct ieee80211_rann_ie))
1153                                 elems->rann = (void *)pos;
1154                         else
1155                                 elem_parse_failed = true;
1156                         break;
1157                 case WLAN_EID_CHANNEL_SWITCH:
1158                         if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1159                                 elem_parse_failed = true;
1160                                 break;
1161                         }
1162                         elems->ch_switch_ie = (void *)pos;
1163                         break;
1164                 case WLAN_EID_EXT_CHANSWITCH_ANN:
1165                         if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1166                                 elem_parse_failed = true;
1167                                 break;
1168                         }
1169                         elems->ext_chansw_ie = (void *)pos;
1170                         break;
1171                 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1172                         if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1173                                 elem_parse_failed = true;
1174                                 break;
1175                         }
1176                         elems->sec_chan_offs = (void *)pos;
1177                         break;
1178                 case WLAN_EID_CHAN_SWITCH_PARAM:
1179                         if (elen !=
1180                             sizeof(*elems->mesh_chansw_params_ie)) {
1181                                 elem_parse_failed = true;
1182                                 break;
1183                         }
1184                         elems->mesh_chansw_params_ie = (void *)pos;
1185                         break;
1186                 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1187                         if (!action ||
1188                             elen != sizeof(*elems->wide_bw_chansw_ie)) {
1189                                 elem_parse_failed = true;
1190                                 break;
1191                         }
1192                         elems->wide_bw_chansw_ie = (void *)pos;
1193                         break;
1194                 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1195                         if (action) {
1196                                 elem_parse_failed = true;
1197                                 break;
1198                         }
1199                         /*
1200                          * This is a bit tricky, but as we only care about
1201                          * the wide bandwidth channel switch element, so
1202                          * just parse it out manually.
1203                          */
1204                         ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1205                                               pos, elen);
1206                         if (ie) {
1207                                 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1208                                         elems->wide_bw_chansw_ie =
1209                                                 (void *)(ie + 2);
1210                                 else
1211                                         elem_parse_failed = true;
1212                         }
1213                         break;
1214                 case WLAN_EID_COUNTRY:
1215                         elems->country_elem = pos;
1216                         elems->country_elem_len = elen;
1217                         break;
1218                 case WLAN_EID_PWR_CONSTRAINT:
1219                         if (elen != 1) {
1220                                 elem_parse_failed = true;
1221                                 break;
1222                         }
1223                         elems->pwr_constr_elem = pos;
1224                         break;
1225                 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1226                         /* Lots of different options exist, but we only care
1227                          * about the Dynamic Transmit Power Control element.
1228                          * First check for the Cisco OUI, then for the DTPC
1229                          * tag (0x00).
1230                          */
1231                         if (elen < 4) {
1232                                 elem_parse_failed = true;
1233                                 break;
1234                         }
1235
1236                         if (pos[0] != 0x00 || pos[1] != 0x40 ||
1237                             pos[2] != 0x96 || pos[3] != 0x00)
1238                                 break;
1239
1240                         if (elen != 6) {
1241                                 elem_parse_failed = true;
1242                                 break;
1243                         }
1244
1245                         if (calc_crc)
1246                                 crc = crc32_be(crc, pos - 2, elen + 2);
1247
1248                         elems->cisco_dtpc_elem = pos;
1249                         break;
1250                 case WLAN_EID_ADDBA_EXT:
1251                         if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1252                                 elem_parse_failed = true;
1253                                 break;
1254                         }
1255                         elems->addba_ext_ie = (void *)pos;
1256                         break;
1257                 case WLAN_EID_TIMEOUT_INTERVAL:
1258                         if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1259                                 elems->timeout_int = (void *)pos;
1260                         else
1261                                 elem_parse_failed = true;
1262                         break;
1263                 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1264                         if (elen >= sizeof(*elems->max_idle_period_ie))
1265                                 elems->max_idle_period_ie = (void *)pos;
1266                         break;
1267                 case WLAN_EID_EXTENSION:
1268                         ieee80211_parse_extension_element(calc_crc ?
1269                                                                 &crc : NULL,
1270                                                           elem, elems);
1271                         break;
1272                 default:
1273                         break;
1274                 }
1275
1276                 if (elem_parse_failed)
1277                         elems->parse_error = true;
1278                 else
1279                         __set_bit(id, seen_elems);
1280         }
1281
1282         if (!for_each_element_completed(elem, start, len))
1283                 elems->parse_error = true;
1284
1285         return crc;
1286 }
1287
1288 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1289                                             struct ieee802_11_elems *elems,
1290                                             u8 *transmitter_bssid,
1291                                             u8 *bss_bssid,
1292                                             u8 *nontransmitted_profile)
1293 {
1294         const struct element *elem, *sub;
1295         size_t profile_len = 0;
1296         bool found = false;
1297
1298         if (!bss_bssid || !transmitter_bssid)
1299                 return profile_len;
1300
1301         for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1302                 if (elem->datalen < 2)
1303                         continue;
1304
1305                 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1306                         u8 new_bssid[ETH_ALEN];
1307                         const u8 *index;
1308
1309                         if (sub->id != 0 || sub->datalen < 4) {
1310                                 /* not a valid BSS profile */
1311                                 continue;
1312                         }
1313
1314                         if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1315                             sub->data[1] != 2) {
1316                                 /* The first element of the
1317                                  * Nontransmitted BSSID Profile is not
1318                                  * the Nontransmitted BSSID Capability
1319                                  * element.
1320                                  */
1321                                 continue;
1322                         }
1323
1324                         memset(nontransmitted_profile, 0, len);
1325                         profile_len = cfg80211_merge_profile(start, len,
1326                                                              elem,
1327                                                              sub,
1328                                                              nontransmitted_profile,
1329                                                              len);
1330
1331                         /* found a Nontransmitted BSSID Profile */
1332                         index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1333                                                  nontransmitted_profile,
1334                                                  profile_len);
1335                         if (!index || index[1] < 1 || index[2] == 0) {
1336                                 /* Invalid MBSSID Index element */
1337                                 continue;
1338                         }
1339
1340                         cfg80211_gen_new_bssid(transmitter_bssid,
1341                                                elem->data[0],
1342                                                index[2],
1343                                                new_bssid);
1344                         if (ether_addr_equal(new_bssid, bss_bssid)) {
1345                                 found = true;
1346                                 elems->bssid_index_len = index[1];
1347                                 elems->bssid_index = (void *)&index[2];
1348                                 break;
1349                         }
1350                 }
1351         }
1352
1353         return found ? profile_len : 0;
1354 }
1355
1356 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1357                                struct ieee802_11_elems *elems,
1358                                u64 filter, u32 crc, u8 *transmitter_bssid,
1359                                u8 *bss_bssid)
1360 {
1361         const struct element *non_inherit = NULL;
1362         u8 *nontransmitted_profile;
1363         int nontransmitted_profile_len = 0;
1364
1365         memset(elems, 0, sizeof(*elems));
1366         elems->ie_start = start;
1367         elems->total_len = len;
1368
1369         nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1370         if (nontransmitted_profile) {
1371                 nontransmitted_profile_len =
1372                         ieee802_11_find_bssid_profile(start, len, elems,
1373                                                       transmitter_bssid,
1374                                                       bss_bssid,
1375                                                       nontransmitted_profile);
1376                 non_inherit =
1377                         cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1378                                                nontransmitted_profile,
1379                                                nontransmitted_profile_len);
1380         }
1381
1382         crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1383                                           crc, non_inherit);
1384
1385         /* Override with nontransmitted profile, if found */
1386         if (nontransmitted_profile_len)
1387                 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1388                                             nontransmitted_profile_len,
1389                                             action, elems, 0, 0, NULL);
1390
1391         if (elems->tim && !elems->parse_error) {
1392                 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1393
1394                 elems->dtim_period = tim_ie->dtim_period;
1395                 elems->dtim_count = tim_ie->dtim_count;
1396         }
1397
1398         /* Override DTIM period and count if needed */
1399         if (elems->bssid_index &&
1400             elems->bssid_index_len >=
1401             offsetofend(struct ieee80211_bssid_index, dtim_period))
1402                 elems->dtim_period = elems->bssid_index->dtim_period;
1403
1404         if (elems->bssid_index &&
1405             elems->bssid_index_len >=
1406             offsetofend(struct ieee80211_bssid_index, dtim_count))
1407                 elems->dtim_count = elems->bssid_index->dtim_count;
1408
1409         kfree(nontransmitted_profile);
1410
1411         return crc;
1412 }
1413
1414 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1415                                            struct ieee80211_tx_queue_params
1416                                            *qparam, int ac)
1417 {
1418         struct ieee80211_chanctx_conf *chanctx_conf;
1419         const struct ieee80211_reg_rule *rrule;
1420         const struct ieee80211_wmm_ac *wmm_ac;
1421         u16 center_freq = 0;
1422
1423         if (sdata->vif.type != NL80211_IFTYPE_AP &&
1424             sdata->vif.type != NL80211_IFTYPE_STATION)
1425                 return;
1426
1427         rcu_read_lock();
1428         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1429         if (chanctx_conf)
1430                 center_freq = chanctx_conf->def.chan->center_freq;
1431
1432         if (!center_freq) {
1433                 rcu_read_unlock();
1434                 return;
1435         }
1436
1437         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1438
1439         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1440                 rcu_read_unlock();
1441                 return;
1442         }
1443
1444         if (sdata->vif.type == NL80211_IFTYPE_AP)
1445                 wmm_ac = &rrule->wmm_rule.ap[ac];
1446         else
1447                 wmm_ac = &rrule->wmm_rule.client[ac];
1448         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1449         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1450         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1451         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1452         rcu_read_unlock();
1453 }
1454
1455 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1456                                bool bss_notify, bool enable_qos)
1457 {
1458         struct ieee80211_local *local = sdata->local;
1459         struct ieee80211_tx_queue_params qparam;
1460         struct ieee80211_chanctx_conf *chanctx_conf;
1461         int ac;
1462         bool use_11b;
1463         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1464         int aCWmin, aCWmax;
1465
1466         if (!local->ops->conf_tx)
1467                 return;
1468
1469         if (local->hw.queues < IEEE80211_NUM_ACS)
1470                 return;
1471
1472         memset(&qparam, 0, sizeof(qparam));
1473
1474         rcu_read_lock();
1475         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1476         use_11b = (chanctx_conf &&
1477                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1478                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1479         rcu_read_unlock();
1480
1481         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1482
1483         /* Set defaults according to 802.11-2007 Table 7-37 */
1484         aCWmax = 1023;
1485         if (use_11b)
1486                 aCWmin = 31;
1487         else
1488                 aCWmin = 15;
1489
1490         /* Confiure old 802.11b/g medium access rules. */
1491         qparam.cw_max = aCWmax;
1492         qparam.cw_min = aCWmin;
1493         qparam.txop = 0;
1494         qparam.aifs = 2;
1495
1496         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1497                 /* Update if QoS is enabled. */
1498                 if (enable_qos) {
1499                         switch (ac) {
1500                         case IEEE80211_AC_BK:
1501                                 qparam.cw_max = aCWmax;
1502                                 qparam.cw_min = aCWmin;
1503                                 qparam.txop = 0;
1504                                 if (is_ocb)
1505                                         qparam.aifs = 9;
1506                                 else
1507                                         qparam.aifs = 7;
1508                                 break;
1509                         /* never happens but let's not leave undefined */
1510                         default:
1511                         case IEEE80211_AC_BE:
1512                                 qparam.cw_max = aCWmax;
1513                                 qparam.cw_min = aCWmin;
1514                                 qparam.txop = 0;
1515                                 if (is_ocb)
1516                                         qparam.aifs = 6;
1517                                 else
1518                                         qparam.aifs = 3;
1519                                 break;
1520                         case IEEE80211_AC_VI:
1521                                 qparam.cw_max = aCWmin;
1522                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1523                                 if (is_ocb)
1524                                         qparam.txop = 0;
1525                                 else if (use_11b)
1526                                         qparam.txop = 6016/32;
1527                                 else
1528                                         qparam.txop = 3008/32;
1529
1530                                 if (is_ocb)
1531                                         qparam.aifs = 3;
1532                                 else
1533                                         qparam.aifs = 2;
1534                                 break;
1535                         case IEEE80211_AC_VO:
1536                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1537                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1538                                 if (is_ocb)
1539                                         qparam.txop = 0;
1540                                 else if (use_11b)
1541                                         qparam.txop = 3264/32;
1542                                 else
1543                                         qparam.txop = 1504/32;
1544                                 qparam.aifs = 2;
1545                                 break;
1546                         }
1547                 }
1548                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1549
1550                 qparam.uapsd = false;
1551
1552                 sdata->tx_conf[ac] = qparam;
1553                 drv_conf_tx(local, sdata, ac, &qparam);
1554         }
1555
1556         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1557             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1558             sdata->vif.type != NL80211_IFTYPE_NAN) {
1559                 sdata->vif.bss_conf.qos = enable_qos;
1560                 if (bss_notify)
1561                         ieee80211_bss_info_change_notify(sdata,
1562                                                          BSS_CHANGED_QOS);
1563         }
1564 }
1565
1566 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1567                          u16 transaction, u16 auth_alg, u16 status,
1568                          const u8 *extra, size_t extra_len, const u8 *da,
1569                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1570                          u32 tx_flags)
1571 {
1572         struct ieee80211_local *local = sdata->local;
1573         struct sk_buff *skb;
1574         struct ieee80211_mgmt *mgmt;
1575         int err;
1576
1577         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1578         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1579                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1580         if (!skb)
1581                 return;
1582
1583         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1584
1585         mgmt = skb_put_zero(skb, 24 + 6);
1586         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1587                                           IEEE80211_STYPE_AUTH);
1588         memcpy(mgmt->da, da, ETH_ALEN);
1589         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1590         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1591         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1592         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1593         mgmt->u.auth.status_code = cpu_to_le16(status);
1594         if (extra)
1595                 skb_put_data(skb, extra, extra_len);
1596
1597         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1598                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1599                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1600                 WARN_ON(err);
1601         }
1602
1603         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1604                                         tx_flags;
1605         ieee80211_tx_skb(sdata, skb);
1606 }
1607
1608 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1609                                     const u8 *da, const u8 *bssid,
1610                                     u16 stype, u16 reason,
1611                                     bool send_frame, u8 *frame_buf)
1612 {
1613         struct ieee80211_local *local = sdata->local;
1614         struct sk_buff *skb;
1615         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1616
1617         /* build frame */
1618         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1619         mgmt->duration = 0; /* initialize only */
1620         mgmt->seq_ctrl = 0; /* initialize only */
1621         memcpy(mgmt->da, da, ETH_ALEN);
1622         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1623         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1624         /* u.deauth.reason_code == u.disassoc.reason_code */
1625         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1626
1627         if (send_frame) {
1628                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1629                                     IEEE80211_DEAUTH_FRAME_LEN);
1630                 if (!skb)
1631                         return;
1632
1633                 skb_reserve(skb, local->hw.extra_tx_headroom);
1634
1635                 /* copy in frame */
1636                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1637
1638                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1639                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1640                         IEEE80211_SKB_CB(skb)->flags |=
1641                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1642
1643                 ieee80211_tx_skb(sdata, skb);
1644         }
1645 }
1646
1647 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1648                                          u8 *buffer, size_t buffer_len,
1649                                          const u8 *ie, size_t ie_len,
1650                                          enum nl80211_band band,
1651                                          u32 rate_mask,
1652                                          struct cfg80211_chan_def *chandef,
1653                                          size_t *offset, u32 flags)
1654 {
1655         struct ieee80211_supported_band *sband;
1656         const struct ieee80211_sta_he_cap *he_cap;
1657         u8 *pos = buffer, *end = buffer + buffer_len;
1658         size_t noffset;
1659         int supp_rates_len, i;
1660         u8 rates[32];
1661         int num_rates;
1662         int ext_rates_len;
1663         int shift;
1664         u32 rate_flags;
1665         bool have_80mhz = false;
1666
1667         *offset = 0;
1668
1669         sband = local->hw.wiphy->bands[band];
1670         if (WARN_ON_ONCE(!sband))
1671                 return 0;
1672
1673         rate_flags = ieee80211_chandef_rate_flags(chandef);
1674         shift = ieee80211_chandef_get_shift(chandef);
1675
1676         num_rates = 0;
1677         for (i = 0; i < sband->n_bitrates; i++) {
1678                 if ((BIT(i) & rate_mask) == 0)
1679                         continue; /* skip rate */
1680                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1681                         continue;
1682
1683                 rates[num_rates++] =
1684                         (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1685                                           (1 << shift) * 5);
1686         }
1687
1688         supp_rates_len = min_t(int, num_rates, 8);
1689
1690         if (end - pos < 2 + supp_rates_len)
1691                 goto out_err;
1692         *pos++ = WLAN_EID_SUPP_RATES;
1693         *pos++ = supp_rates_len;
1694         memcpy(pos, rates, supp_rates_len);
1695         pos += supp_rates_len;
1696
1697         /* insert "request information" if in custom IEs */
1698         if (ie && ie_len) {
1699                 static const u8 before_extrates[] = {
1700                         WLAN_EID_SSID,
1701                         WLAN_EID_SUPP_RATES,
1702                         WLAN_EID_REQUEST,
1703                 };
1704                 noffset = ieee80211_ie_split(ie, ie_len,
1705                                              before_extrates,
1706                                              ARRAY_SIZE(before_extrates),
1707                                              *offset);
1708                 if (end - pos < noffset - *offset)
1709                         goto out_err;
1710                 memcpy(pos, ie + *offset, noffset - *offset);
1711                 pos += noffset - *offset;
1712                 *offset = noffset;
1713         }
1714
1715         ext_rates_len = num_rates - supp_rates_len;
1716         if (ext_rates_len > 0) {
1717                 if (end - pos < 2 + ext_rates_len)
1718                         goto out_err;
1719                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1720                 *pos++ = ext_rates_len;
1721                 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1722                 pos += ext_rates_len;
1723         }
1724
1725         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1726                 if (end - pos < 3)
1727                         goto out_err;
1728                 *pos++ = WLAN_EID_DS_PARAMS;
1729                 *pos++ = 1;
1730                 *pos++ = ieee80211_frequency_to_channel(
1731                                 chandef->chan->center_freq);
1732         }
1733
1734         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1735                 goto done;
1736
1737         /* insert custom IEs that go before HT */
1738         if (ie && ie_len) {
1739                 static const u8 before_ht[] = {
1740                         /*
1741                          * no need to list the ones split off already
1742                          * (or generated here)
1743                          */
1744                         WLAN_EID_DS_PARAMS,
1745                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1746                 };
1747                 noffset = ieee80211_ie_split(ie, ie_len,
1748                                              before_ht, ARRAY_SIZE(before_ht),
1749                                              *offset);
1750                 if (end - pos < noffset - *offset)
1751                         goto out_err;
1752                 memcpy(pos, ie + *offset, noffset - *offset);
1753                 pos += noffset - *offset;
1754                 *offset = noffset;
1755         }
1756
1757         if (sband->ht_cap.ht_supported) {
1758                 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1759                         goto out_err;
1760                 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1761                                                 sband->ht_cap.cap);
1762         }
1763
1764         /* insert custom IEs that go before VHT */
1765         if (ie && ie_len) {
1766                 static const u8 before_vht[] = {
1767                         /*
1768                          * no need to list the ones split off already
1769                          * (or generated here)
1770                          */
1771                         WLAN_EID_BSS_COEX_2040,
1772                         WLAN_EID_EXT_CAPABILITY,
1773                         WLAN_EID_SSID_LIST,
1774                         WLAN_EID_CHANNEL_USAGE,
1775                         WLAN_EID_INTERWORKING,
1776                         WLAN_EID_MESH_ID,
1777                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1778                 };
1779                 noffset = ieee80211_ie_split(ie, ie_len,
1780                                              before_vht, ARRAY_SIZE(before_vht),
1781                                              *offset);
1782                 if (end - pos < noffset - *offset)
1783                         goto out_err;
1784                 memcpy(pos, ie + *offset, noffset - *offset);
1785                 pos += noffset - *offset;
1786                 *offset = noffset;
1787         }
1788
1789         /* Check if any channel in this sband supports at least 80 MHz */
1790         for (i = 0; i < sband->n_channels; i++) {
1791                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1792                                                 IEEE80211_CHAN_NO_80MHZ))
1793                         continue;
1794
1795                 have_80mhz = true;
1796                 break;
1797         }
1798
1799         if (sband->vht_cap.vht_supported && have_80mhz) {
1800                 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1801                         goto out_err;
1802                 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1803                                                  sband->vht_cap.cap);
1804         }
1805
1806         /* insert custom IEs that go before HE */
1807         if (ie && ie_len) {
1808                 static const u8 before_he[] = {
1809                         /*
1810                          * no need to list the ones split off before VHT
1811                          * or generated here
1812                          */
1813                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1814                         WLAN_EID_AP_CSN,
1815                         /* TODO: add 11ah/11aj/11ak elements */
1816                 };
1817                 noffset = ieee80211_ie_split(ie, ie_len,
1818                                              before_he, ARRAY_SIZE(before_he),
1819                                              *offset);
1820                 if (end - pos < noffset - *offset)
1821                         goto out_err;
1822                 memcpy(pos, ie + *offset, noffset - *offset);
1823                 pos += noffset - *offset;
1824                 *offset = noffset;
1825         }
1826
1827         he_cap = ieee80211_get_he_sta_cap(sband);
1828         if (he_cap) {
1829                 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1830                 if (!pos)
1831                         goto out_err;
1832         }
1833
1834         /*
1835          * If adding more here, adjust code in main.c
1836          * that calculates local->scan_ies_len.
1837          */
1838
1839         return pos - buffer;
1840  out_err:
1841         WARN_ONCE(1, "not enough space for preq IEs\n");
1842  done:
1843         return pos - buffer;
1844 }
1845
1846 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1847                              size_t buffer_len,
1848                              struct ieee80211_scan_ies *ie_desc,
1849                              const u8 *ie, size_t ie_len,
1850                              u8 bands_used, u32 *rate_masks,
1851                              struct cfg80211_chan_def *chandef,
1852                              u32 flags)
1853 {
1854         size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1855         int i;
1856
1857         memset(ie_desc, 0, sizeof(*ie_desc));
1858
1859         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1860                 if (bands_used & BIT(i)) {
1861                         pos += ieee80211_build_preq_ies_band(local,
1862                                                              buffer + pos,
1863                                                              buffer_len - pos,
1864                                                              ie, ie_len, i,
1865                                                              rate_masks[i],
1866                                                              chandef,
1867                                                              &custom_ie_offset,
1868                                                              flags);
1869                         ie_desc->ies[i] = buffer + old_pos;
1870                         ie_desc->len[i] = pos - old_pos;
1871                         old_pos = pos;
1872                 }
1873         }
1874
1875         /* add any remaining custom IEs */
1876         if (ie && ie_len) {
1877                 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1878                               "not enough space for preq custom IEs\n"))
1879                         return pos;
1880                 memcpy(buffer + pos, ie + custom_ie_offset,
1881                        ie_len - custom_ie_offset);
1882                 ie_desc->common_ies = buffer + pos;
1883                 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1884                 pos += ie_len - custom_ie_offset;
1885         }
1886
1887         return pos;
1888 };
1889
1890 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1891                                           const u8 *src, const u8 *dst,
1892                                           u32 ratemask,
1893                                           struct ieee80211_channel *chan,
1894                                           const u8 *ssid, size_t ssid_len,
1895                                           const u8 *ie, size_t ie_len,
1896                                           u32 flags)
1897 {
1898         struct ieee80211_local *local = sdata->local;
1899         struct cfg80211_chan_def chandef;
1900         struct sk_buff *skb;
1901         struct ieee80211_mgmt *mgmt;
1902         int ies_len;
1903         u32 rate_masks[NUM_NL80211_BANDS] = {};
1904         struct ieee80211_scan_ies dummy_ie_desc;
1905
1906         /*
1907          * Do not send DS Channel parameter for directed probe requests
1908          * in order to maximize the chance that we get a response.  Some
1909          * badly-behaved APs don't respond when this parameter is included.
1910          */
1911         chandef.width = sdata->vif.bss_conf.chandef.width;
1912         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1913                 chandef.chan = NULL;
1914         else
1915                 chandef.chan = chan;
1916
1917         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1918                                      100 + ie_len);
1919         if (!skb)
1920                 return NULL;
1921
1922         rate_masks[chan->band] = ratemask;
1923         ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1924                                            skb_tailroom(skb), &dummy_ie_desc,
1925                                            ie, ie_len, BIT(chan->band),
1926                                            rate_masks, &chandef, flags);
1927         skb_put(skb, ies_len);
1928
1929         if (dst) {
1930                 mgmt = (struct ieee80211_mgmt *) skb->data;
1931                 memcpy(mgmt->da, dst, ETH_ALEN);
1932                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1933         }
1934
1935         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1936
1937         return skb;
1938 }
1939
1940 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1941                             struct ieee802_11_elems *elems,
1942                             enum nl80211_band band, u32 *basic_rates)
1943 {
1944         struct ieee80211_supported_band *sband;
1945         size_t num_rates;
1946         u32 supp_rates, rate_flags;
1947         int i, j, shift;
1948
1949         sband = sdata->local->hw.wiphy->bands[band];
1950         if (WARN_ON(!sband))
1951                 return 1;
1952
1953         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1954         shift = ieee80211_vif_get_shift(&sdata->vif);
1955
1956         num_rates = sband->n_bitrates;
1957         supp_rates = 0;
1958         for (i = 0; i < elems->supp_rates_len +
1959                      elems->ext_supp_rates_len; i++) {
1960                 u8 rate = 0;
1961                 int own_rate;
1962                 bool is_basic;
1963                 if (i < elems->supp_rates_len)
1964                         rate = elems->supp_rates[i];
1965                 else if (elems->ext_supp_rates)
1966                         rate = elems->ext_supp_rates
1967                                 [i - elems->supp_rates_len];
1968                 own_rate = 5 * (rate & 0x7f);
1969                 is_basic = !!(rate & 0x80);
1970
1971                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1972                         continue;
1973
1974                 for (j = 0; j < num_rates; j++) {
1975                         int brate;
1976                         if ((rate_flags & sband->bitrates[j].flags)
1977                             != rate_flags)
1978                                 continue;
1979
1980                         brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1981                                              1 << shift);
1982
1983                         if (brate == own_rate) {
1984                                 supp_rates |= BIT(j);
1985                                 if (basic_rates && is_basic)
1986                                         *basic_rates |= BIT(j);
1987                         }
1988                 }
1989         }
1990         return supp_rates;
1991 }
1992
1993 void ieee80211_stop_device(struct ieee80211_local *local)
1994 {
1995         ieee80211_led_radio(local, false);
1996         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1997
1998         cancel_work_sync(&local->reconfig_filter);
1999
2000         flush_workqueue(local->workqueue);
2001         drv_stop(local);
2002 }
2003
2004 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2005                                            bool aborted)
2006 {
2007         /* It's possible that we don't handle the scan completion in
2008          * time during suspend, so if it's still marked as completed
2009          * here, queue the work and flush it to clean things up.
2010          * Instead of calling the worker function directly here, we
2011          * really queue it to avoid potential races with other flows
2012          * scheduling the same work.
2013          */
2014         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2015                 /* If coming from reconfiguration failure, abort the scan so
2016                  * we don't attempt to continue a partial HW scan - which is
2017                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
2018                  * completed scan, and a 5 GHz portion is still pending.
2019                  */
2020                 if (aborted)
2021                         set_bit(SCAN_ABORTED, &local->scanning);
2022                 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2023                 flush_delayed_work(&local->scan_work);
2024         }
2025 }
2026
2027 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2028 {
2029         struct ieee80211_sub_if_data *sdata;
2030         struct ieee80211_chanctx *ctx;
2031
2032         /*
2033          * We get here if during resume the device can't be restarted properly.
2034          * We might also get here if this happens during HW reset, which is a
2035          * slightly different situation and we need to drop all connections in
2036          * the latter case.
2037          *
2038          * Ask cfg80211 to turn off all interfaces, this will result in more
2039          * warnings but at least we'll then get into a clean stopped state.
2040          */
2041
2042         local->resuming = false;
2043         local->suspended = false;
2044         local->in_reconfig = false;
2045
2046         ieee80211_flush_completed_scan(local, true);
2047
2048         /* scheduled scan clearly can't be running any more, but tell
2049          * cfg80211 and clear local state
2050          */
2051         ieee80211_sched_scan_end(local);
2052
2053         list_for_each_entry(sdata, &local->interfaces, list)
2054                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2055
2056         /* Mark channel contexts as not being in the driver any more to avoid
2057          * removing them from the driver during the shutdown process...
2058          */
2059         mutex_lock(&local->chanctx_mtx);
2060         list_for_each_entry(ctx, &local->chanctx_list, list)
2061                 ctx->driver_present = false;
2062         mutex_unlock(&local->chanctx_mtx);
2063
2064         cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2065 }
2066
2067 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2068                                      struct ieee80211_sub_if_data *sdata)
2069 {
2070         struct ieee80211_chanctx_conf *conf;
2071         struct ieee80211_chanctx *ctx;
2072
2073         if (!local->use_chanctx)
2074                 return;
2075
2076         mutex_lock(&local->chanctx_mtx);
2077         conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2078                                          lockdep_is_held(&local->chanctx_mtx));
2079         if (conf) {
2080                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2081                 drv_assign_vif_chanctx(local, sdata, ctx);
2082         }
2083         mutex_unlock(&local->chanctx_mtx);
2084 }
2085
2086 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2087 {
2088         struct ieee80211_local *local = sdata->local;
2089         struct sta_info *sta;
2090
2091         /* add STAs back */
2092         mutex_lock(&local->sta_mtx);
2093         list_for_each_entry(sta, &local->sta_list, list) {
2094                 enum ieee80211_sta_state state;
2095
2096                 if (!sta->uploaded || sta->sdata != sdata)
2097                         continue;
2098
2099                 for (state = IEEE80211_STA_NOTEXIST;
2100                      state < sta->sta_state; state++)
2101                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2102                                               state + 1));
2103         }
2104         mutex_unlock(&local->sta_mtx);
2105 }
2106
2107 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2108 {
2109         struct cfg80211_nan_func *func, **funcs;
2110         int res, id, i = 0;
2111
2112         res = drv_start_nan(sdata->local, sdata,
2113                             &sdata->u.nan.conf);
2114         if (WARN_ON(res))
2115                 return res;
2116
2117         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2118                         sizeof(*funcs),
2119                         GFP_KERNEL);
2120         if (!funcs)
2121                 return -ENOMEM;
2122
2123         /* Add all the functions:
2124          * This is a little bit ugly. We need to call a potentially sleeping
2125          * callback for each NAN function, so we can't hold the spinlock.
2126          */
2127         spin_lock_bh(&sdata->u.nan.func_lock);
2128
2129         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2130                 funcs[i++] = func;
2131
2132         spin_unlock_bh(&sdata->u.nan.func_lock);
2133
2134         for (i = 0; funcs[i]; i++) {
2135                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2136                 if (WARN_ON(res))
2137                         ieee80211_nan_func_terminated(&sdata->vif,
2138                                                       funcs[i]->instance_id,
2139                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
2140                                                       GFP_KERNEL);
2141         }
2142
2143         kfree(funcs);
2144
2145         return 0;
2146 }
2147
2148 int ieee80211_reconfig(struct ieee80211_local *local)
2149 {
2150         struct ieee80211_hw *hw = &local->hw;
2151         struct ieee80211_sub_if_data *sdata;
2152         struct ieee80211_chanctx *ctx;
2153         struct sta_info *sta;
2154         int res, i;
2155         bool reconfig_due_to_wowlan = false;
2156         struct ieee80211_sub_if_data *sched_scan_sdata;
2157         struct cfg80211_sched_scan_request *sched_scan_req;
2158         bool sched_scan_stopped = false;
2159         bool suspended = local->suspended;
2160
2161         /* nothing to do if HW shouldn't run */
2162         if (!local->open_count)
2163                 goto wake_up;
2164
2165 #ifdef CONFIG_PM
2166         if (suspended)
2167                 local->resuming = true;
2168
2169         if (local->wowlan) {
2170                 /*
2171                  * In the wowlan case, both mac80211 and the device
2172                  * are functional when the resume op is called, so
2173                  * clear local->suspended so the device could operate
2174                  * normally (e.g. pass rx frames).
2175                  */
2176                 local->suspended = false;
2177                 res = drv_resume(local);
2178                 local->wowlan = false;
2179                 if (res < 0) {
2180                         local->resuming = false;
2181                         return res;
2182                 }
2183                 if (res == 0)
2184                         goto wake_up;
2185                 WARN_ON(res > 1);
2186                 /*
2187                  * res is 1, which means the driver requested
2188                  * to go through a regular reset on wakeup.
2189                  * restore local->suspended in this case.
2190                  */
2191                 reconfig_due_to_wowlan = true;
2192                 local->suspended = true;
2193         }
2194 #endif
2195
2196         /*
2197          * In case of hw_restart during suspend (without wowlan),
2198          * cancel restart work, as we are reconfiguring the device
2199          * anyway.
2200          * Note that restart_work is scheduled on a frozen workqueue,
2201          * so we can't deadlock in this case.
2202          */
2203         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2204                 cancel_work_sync(&local->restart_work);
2205
2206         local->started = false;
2207
2208         /*
2209          * Upon resume hardware can sometimes be goofy due to
2210          * various platform / driver / bus issues, so restarting
2211          * the device may at times not work immediately. Propagate
2212          * the error.
2213          */
2214         res = drv_start(local);
2215         if (res) {
2216                 if (suspended)
2217                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2218                 else
2219                         WARN(1, "Hardware became unavailable during restart.\n");
2220                 ieee80211_handle_reconfig_failure(local);
2221                 return res;
2222         }
2223
2224         /* setup fragmentation threshold */
2225         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2226
2227         /* setup RTS threshold */
2228         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2229
2230         /* reset coverage class */
2231         drv_set_coverage_class(local, hw->wiphy->coverage_class);
2232
2233         ieee80211_led_radio(local, true);
2234         ieee80211_mod_tpt_led_trig(local,
2235                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2236
2237         /* add interfaces */
2238         sdata = rtnl_dereference(local->monitor_sdata);
2239         if (sdata) {
2240                 /* in HW restart it exists already */
2241                 WARN_ON(local->resuming);
2242                 res = drv_add_interface(local, sdata);
2243                 if (WARN_ON(res)) {
2244                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
2245                         synchronize_net();
2246                         kfree(sdata);
2247                 }
2248         }
2249
2250         list_for_each_entry(sdata, &local->interfaces, list) {
2251                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2252                     sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2253                     ieee80211_sdata_running(sdata)) {
2254                         res = drv_add_interface(local, sdata);
2255                         if (WARN_ON(res))
2256                                 break;
2257                 }
2258         }
2259
2260         /* If adding any of the interfaces failed above, roll back and
2261          * report failure.
2262          */
2263         if (res) {
2264                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2265                                                      list)
2266                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2267                             sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2268                             ieee80211_sdata_running(sdata))
2269                                 drv_remove_interface(local, sdata);
2270                 ieee80211_handle_reconfig_failure(local);
2271                 return res;
2272         }
2273
2274         /* add channel contexts */
2275         if (local->use_chanctx) {
2276                 mutex_lock(&local->chanctx_mtx);
2277                 list_for_each_entry(ctx, &local->chanctx_list, list)
2278                         if (ctx->replace_state !=
2279                             IEEE80211_CHANCTX_REPLACES_OTHER)
2280                                 WARN_ON(drv_add_chanctx(local, ctx));
2281                 mutex_unlock(&local->chanctx_mtx);
2282
2283                 sdata = rtnl_dereference(local->monitor_sdata);
2284                 if (sdata && ieee80211_sdata_running(sdata))
2285                         ieee80211_assign_chanctx(local, sdata);
2286         }
2287
2288         /* reconfigure hardware */
2289         ieee80211_hw_config(local, ~0);
2290
2291         ieee80211_configure_filter(local);
2292
2293         /* Finally also reconfigure all the BSS information */
2294         list_for_each_entry(sdata, &local->interfaces, list) {
2295                 u32 changed;
2296
2297                 if (!ieee80211_sdata_running(sdata))
2298                         continue;
2299
2300                 ieee80211_assign_chanctx(local, sdata);
2301
2302                 switch (sdata->vif.type) {
2303                 case NL80211_IFTYPE_AP_VLAN:
2304                 case NL80211_IFTYPE_MONITOR:
2305                         break;
2306                 case NL80211_IFTYPE_ADHOC:
2307                         if (sdata->vif.bss_conf.ibss_joined)
2308                                 WARN_ON(drv_join_ibss(local, sdata));
2309                         /* fall through */
2310                 default:
2311                         ieee80211_reconfig_stations(sdata);
2312                         /* fall through */
2313                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2314                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
2315                                 drv_conf_tx(local, sdata, i,
2316                                             &sdata->tx_conf[i]);
2317                         break;
2318                 }
2319
2320                 /* common change flags for all interface types */
2321                 changed = BSS_CHANGED_ERP_CTS_PROT |
2322                           BSS_CHANGED_ERP_PREAMBLE |
2323                           BSS_CHANGED_ERP_SLOT |
2324                           BSS_CHANGED_HT |
2325                           BSS_CHANGED_BASIC_RATES |
2326                           BSS_CHANGED_BEACON_INT |
2327                           BSS_CHANGED_BSSID |
2328                           BSS_CHANGED_CQM |
2329                           BSS_CHANGED_QOS |
2330                           BSS_CHANGED_IDLE |
2331                           BSS_CHANGED_TXPOWER |
2332                           BSS_CHANGED_MCAST_RATE;
2333
2334                 if (sdata->vif.mu_mimo_owner)
2335                         changed |= BSS_CHANGED_MU_GROUPS;
2336
2337                 switch (sdata->vif.type) {
2338                 case NL80211_IFTYPE_STATION:
2339                         changed |= BSS_CHANGED_ASSOC |
2340                                    BSS_CHANGED_ARP_FILTER |
2341                                    BSS_CHANGED_PS;
2342
2343                         /* Re-send beacon info report to the driver */
2344                         if (sdata->u.mgd.have_beacon)
2345                                 changed |= BSS_CHANGED_BEACON_INFO;
2346
2347                         if (sdata->vif.bss_conf.max_idle_period ||
2348                             sdata->vif.bss_conf.protected_keep_alive)
2349                                 changed |= BSS_CHANGED_KEEP_ALIVE;
2350
2351                         sdata_lock(sdata);
2352                         ieee80211_bss_info_change_notify(sdata, changed);
2353                         sdata_unlock(sdata);
2354                         break;
2355                 case NL80211_IFTYPE_OCB:
2356                         changed |= BSS_CHANGED_OCB;
2357                         ieee80211_bss_info_change_notify(sdata, changed);
2358                         break;
2359                 case NL80211_IFTYPE_ADHOC:
2360                         changed |= BSS_CHANGED_IBSS;
2361                         /* fall through */
2362                 case NL80211_IFTYPE_AP:
2363                         changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2364
2365                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2366                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2367                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2368                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2369
2370                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2371                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2372
2373                                 if (rcu_access_pointer(sdata->u.ap.beacon))
2374                                         drv_start_ap(local, sdata);
2375                         }
2376
2377                         /* fall through */
2378                 case NL80211_IFTYPE_MESH_POINT:
2379                         if (sdata->vif.bss_conf.enable_beacon) {
2380                                 changed |= BSS_CHANGED_BEACON |
2381                                            BSS_CHANGED_BEACON_ENABLED;
2382                                 ieee80211_bss_info_change_notify(sdata, changed);
2383                         }
2384                         break;
2385                 case NL80211_IFTYPE_NAN:
2386                         res = ieee80211_reconfig_nan(sdata);
2387                         if (res < 0) {
2388                                 ieee80211_handle_reconfig_failure(local);
2389                                 return res;
2390                         }
2391                         break;
2392                 case NL80211_IFTYPE_WDS:
2393                 case NL80211_IFTYPE_AP_VLAN:
2394                 case NL80211_IFTYPE_MONITOR:
2395                 case NL80211_IFTYPE_P2P_DEVICE:
2396                         /* nothing to do */
2397                         break;
2398                 case NL80211_IFTYPE_UNSPECIFIED:
2399                 case NUM_NL80211_IFTYPES:
2400                 case NL80211_IFTYPE_P2P_CLIENT:
2401                 case NL80211_IFTYPE_P2P_GO:
2402                         WARN_ON(1);
2403                         break;
2404                 }
2405         }
2406
2407         ieee80211_recalc_ps(local);
2408
2409         /*
2410          * The sta might be in psm against the ap (e.g. because
2411          * this was the state before a hw restart), so we
2412          * explicitly send a null packet in order to make sure
2413          * it'll sync against the ap (and get out of psm).
2414          */
2415         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2416                 list_for_each_entry(sdata, &local->interfaces, list) {
2417                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2418                                 continue;
2419                         if (!sdata->u.mgd.associated)
2420                                 continue;
2421
2422                         ieee80211_send_nullfunc(local, sdata, false);
2423                 }
2424         }
2425
2426         /* APs are now beaconing, add back stations */
2427         mutex_lock(&local->sta_mtx);
2428         list_for_each_entry(sta, &local->sta_list, list) {
2429                 enum ieee80211_sta_state state;
2430
2431                 if (!sta->uploaded)
2432                         continue;
2433
2434                 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2435                     sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2436                         continue;
2437
2438                 for (state = IEEE80211_STA_NOTEXIST;
2439                      state < sta->sta_state; state++)
2440                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2441                                               state + 1));
2442         }
2443         mutex_unlock(&local->sta_mtx);
2444
2445         /* add back keys */
2446         list_for_each_entry(sdata, &local->interfaces, list)
2447                 ieee80211_reenable_keys(sdata);
2448
2449         /* Reconfigure sched scan if it was interrupted by FW restart */
2450         mutex_lock(&local->mtx);
2451         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2452                                                 lockdep_is_held(&local->mtx));
2453         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2454                                                 lockdep_is_held(&local->mtx));
2455         if (sched_scan_sdata && sched_scan_req)
2456                 /*
2457                  * Sched scan stopped, but we don't want to report it. Instead,
2458                  * we're trying to reschedule. However, if more than one scan
2459                  * plan was set, we cannot reschedule since we don't know which
2460                  * scan plan was currently running (and some scan plans may have
2461                  * already finished).
2462                  */
2463                 if (sched_scan_req->n_scan_plans > 1 ||
2464                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2465                                                          sched_scan_req)) {
2466                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2467                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2468                         sched_scan_stopped = true;
2469                 }
2470         mutex_unlock(&local->mtx);
2471
2472         if (sched_scan_stopped)
2473                 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2474
2475  wake_up:
2476
2477         if (local->monitors == local->open_count && local->monitors > 0)
2478                 ieee80211_add_virtual_monitor(local);
2479
2480         /*
2481          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2482          * sessions can be established after a resume.
2483          *
2484          * Also tear down aggregation sessions since reconfiguring
2485          * them in a hardware restart scenario is not easily done
2486          * right now, and the hardware will have lost information
2487          * about the sessions, but we and the AP still think they
2488          * are active. This is really a workaround though.
2489          */
2490         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2491                 mutex_lock(&local->sta_mtx);
2492
2493                 list_for_each_entry(sta, &local->sta_list, list) {
2494                         if (!local->resuming)
2495                                 ieee80211_sta_tear_down_BA_sessions(
2496                                                 sta, AGG_STOP_LOCAL_REQUEST);
2497                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2498                 }
2499
2500                 mutex_unlock(&local->sta_mtx);
2501         }
2502
2503         if (local->in_reconfig) {
2504                 local->in_reconfig = false;
2505                 barrier();
2506
2507                 /* Restart deferred ROCs */
2508                 mutex_lock(&local->mtx);
2509                 ieee80211_start_next_roc(local);
2510                 mutex_unlock(&local->mtx);
2511
2512                 /* Requeue all works */
2513                 list_for_each_entry(sdata, &local->interfaces, list)
2514                         ieee80211_queue_work(&local->hw, &sdata->work);
2515         }
2516
2517         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2518                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2519                                         false);
2520
2521         /*
2522          * If this is for hw restart things are still running.
2523          * We may want to change that later, however.
2524          */
2525         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2526                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2527
2528         if (!suspended)
2529                 return 0;
2530
2531 #ifdef CONFIG_PM
2532         /* first set suspended false, then resuming */
2533         local->suspended = false;
2534         mb();
2535         local->resuming = false;
2536
2537         ieee80211_flush_completed_scan(local, false);
2538
2539         if (local->open_count && !reconfig_due_to_wowlan)
2540                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2541
2542         list_for_each_entry(sdata, &local->interfaces, list) {
2543                 if (!ieee80211_sdata_running(sdata))
2544                         continue;
2545                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2546                         ieee80211_sta_restart(sdata);
2547         }
2548
2549         mod_timer(&local->sta_cleanup, jiffies + 1);
2550 #else
2551         WARN_ON(1);
2552 #endif
2553
2554         return 0;
2555 }
2556
2557 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2558 {
2559         struct ieee80211_sub_if_data *sdata;
2560         struct ieee80211_local *local;
2561         struct ieee80211_key *key;
2562
2563         if (WARN_ON(!vif))
2564                 return;
2565
2566         sdata = vif_to_sdata(vif);
2567         local = sdata->local;
2568
2569         if (WARN_ON(!local->resuming))
2570                 return;
2571
2572         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2573                 return;
2574
2575         sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2576
2577         mutex_lock(&local->key_mtx);
2578         list_for_each_entry(key, &sdata->key_list, list)
2579                 key->flags |= KEY_FLAG_TAINTED;
2580         mutex_unlock(&local->key_mtx);
2581 }
2582 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2583
2584 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2585 {
2586         struct ieee80211_local *local = sdata->local;
2587         struct ieee80211_chanctx_conf *chanctx_conf;
2588         struct ieee80211_chanctx *chanctx;
2589
2590         mutex_lock(&local->chanctx_mtx);
2591
2592         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2593                                         lockdep_is_held(&local->chanctx_mtx));
2594
2595         /*
2596          * This function can be called from a work, thus it may be possible
2597          * that the chanctx_conf is removed (due to a disconnection, for
2598          * example).
2599          * So nothing should be done in such case.
2600          */
2601         if (!chanctx_conf)
2602                 goto unlock;
2603
2604         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2605         ieee80211_recalc_smps_chanctx(local, chanctx);
2606  unlock:
2607         mutex_unlock(&local->chanctx_mtx);
2608 }
2609
2610 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2611 {
2612         struct ieee80211_local *local = sdata->local;
2613         struct ieee80211_chanctx_conf *chanctx_conf;
2614         struct ieee80211_chanctx *chanctx;
2615
2616         mutex_lock(&local->chanctx_mtx);
2617
2618         chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2619                                         lockdep_is_held(&local->chanctx_mtx));
2620
2621         if (WARN_ON_ONCE(!chanctx_conf))
2622                 goto unlock;
2623
2624         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2625         ieee80211_recalc_chanctx_min_def(local, chanctx);
2626  unlock:
2627         mutex_unlock(&local->chanctx_mtx);
2628 }
2629
2630 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2631 {
2632         size_t pos = offset;
2633
2634         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2635                 pos += 2 + ies[pos + 1];
2636
2637         return pos;
2638 }
2639
2640 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2641                                             int rssi_min_thold,
2642                                             int rssi_max_thold)
2643 {
2644         trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2645
2646         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2647                 return;
2648
2649         /*
2650          * Scale up threshold values before storing it, as the RSSI averaging
2651          * algorithm uses a scaled up value as well. Change this scaling
2652          * factor if the RSSI averaging algorithm changes.
2653          */
2654         sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2655         sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2656 }
2657
2658 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2659                                     int rssi_min_thold,
2660                                     int rssi_max_thold)
2661 {
2662         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2663
2664         WARN_ON(rssi_min_thold == rssi_max_thold ||
2665                 rssi_min_thold > rssi_max_thold);
2666
2667         _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2668                                        rssi_max_thold);
2669 }
2670 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2671
2672 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2673 {
2674         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2675
2676         _ieee80211_enable_rssi_reports(sdata, 0, 0);
2677 }
2678 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2679
2680 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2681                               u16 cap)
2682 {
2683         __le16 tmp;
2684
2685         *pos++ = WLAN_EID_HT_CAPABILITY;
2686         *pos++ = sizeof(struct ieee80211_ht_cap);
2687         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2688
2689         /* capability flags */
2690         tmp = cpu_to_le16(cap);
2691         memcpy(pos, &tmp, sizeof(u16));
2692         pos += sizeof(u16);
2693
2694         /* AMPDU parameters */
2695         *pos++ = ht_cap->ampdu_factor |
2696                  (ht_cap->ampdu_density <<
2697                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2698
2699         /* MCS set */
2700         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2701         pos += sizeof(ht_cap->mcs);
2702
2703         /* extended capabilities */
2704         pos += sizeof(__le16);
2705
2706         /* BF capabilities */
2707         pos += sizeof(__le32);
2708
2709         /* antenna selection */
2710         pos += sizeof(u8);
2711
2712         return pos;
2713 }
2714
2715 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2716                                u32 cap)
2717 {
2718         __le32 tmp;
2719
2720         *pos++ = WLAN_EID_VHT_CAPABILITY;
2721         *pos++ = sizeof(struct ieee80211_vht_cap);
2722         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2723
2724         /* capability flags */
2725         tmp = cpu_to_le32(cap);
2726         memcpy(pos, &tmp, sizeof(u32));
2727         pos += sizeof(u32);
2728
2729         /* VHT MCS set */
2730         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2731         pos += sizeof(vht_cap->vht_mcs);
2732
2733         return pos;
2734 }
2735
2736 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2737 {
2738         const struct ieee80211_sta_he_cap *he_cap;
2739         struct ieee80211_supported_band *sband;
2740         u8 n;
2741
2742         sband = ieee80211_get_sband(sdata);
2743         if (!sband)
2744                 return 0;
2745
2746         he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2747         if (!he_cap)
2748                 return 0;
2749
2750         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2751         return 2 + 1 +
2752                sizeof(he_cap->he_cap_elem) + n +
2753                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2754                                      he_cap->he_cap_elem.phy_cap_info);
2755 }
2756
2757 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2758                               const struct ieee80211_sta_he_cap *he_cap,
2759                               u8 *end)
2760 {
2761         u8 n;
2762         u8 ie_len;
2763         u8 *orig_pos = pos;
2764
2765         /* Make sure we have place for the IE */
2766         /*
2767          * TODO: the 1 added is because this temporarily is under the EXTENSION
2768          * IE. Get rid of it when it moves.
2769          */
2770         if (!he_cap)
2771                 return orig_pos;
2772
2773         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2774         ie_len = 2 + 1 +
2775                  sizeof(he_cap->he_cap_elem) + n +
2776                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2777                                        he_cap->he_cap_elem.phy_cap_info);
2778
2779         if ((end - pos) < ie_len)
2780                 return orig_pos;
2781
2782         *pos++ = WLAN_EID_EXTENSION;
2783         pos++; /* We'll set the size later below */
2784         *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2785
2786         /* Fixed data */
2787         memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2788         pos += sizeof(he_cap->he_cap_elem);
2789
2790         memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2791         pos += n;
2792
2793         /* Check if PPE Threshold should be present */
2794         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2795              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2796                 goto end;
2797
2798         /*
2799          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2800          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2801          */
2802         n = hweight8(he_cap->ppe_thres[0] &
2803                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2804         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2805                    IEEE80211_PPE_THRES_NSS_POS));
2806
2807         /*
2808          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2809          * total size.
2810          */
2811         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2812         n = DIV_ROUND_UP(n, 8);
2813
2814         /* Copy PPE Thresholds */
2815         memcpy(pos, &he_cap->ppe_thres, n);
2816         pos += n;
2817
2818 end:
2819         orig_pos[1] = (pos - orig_pos) - 2;
2820         return pos;
2821 }
2822
2823 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2824                                const struct cfg80211_chan_def *chandef,
2825                                u16 prot_mode, bool rifs_mode)
2826 {
2827         struct ieee80211_ht_operation *ht_oper;
2828         /* Build HT Information */
2829         *pos++ = WLAN_EID_HT_OPERATION;
2830         *pos++ = sizeof(struct ieee80211_ht_operation);
2831         ht_oper = (struct ieee80211_ht_operation *)pos;
2832         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2833                                         chandef->chan->center_freq);
2834         switch (chandef->width) {
2835         case NL80211_CHAN_WIDTH_160:
2836         case NL80211_CHAN_WIDTH_80P80:
2837         case NL80211_CHAN_WIDTH_80:
2838         case NL80211_CHAN_WIDTH_40:
2839                 if (chandef->center_freq1 > chandef->chan->center_freq)
2840                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2841                 else
2842                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2843                 break;
2844         default:
2845                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2846                 break;
2847         }
2848         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2849             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2850             chandef->width != NL80211_CHAN_WIDTH_20)
2851                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2852
2853         if (rifs_mode)
2854                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2855
2856         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2857         ht_oper->stbc_param = 0x0000;
2858
2859         /* It seems that Basic MCS set and Supported MCS set
2860            are identical for the first 10 bytes */
2861         memset(&ht_oper->basic_set, 0, 16);
2862         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2863
2864         return pos + sizeof(struct ieee80211_ht_operation);
2865 }
2866
2867 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2868                                    const struct cfg80211_chan_def *chandef)
2869 {
2870         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2871         *pos++ = 3;                                     /* IE length */
2872         /* New channel width */
2873         switch (chandef->width) {
2874         case NL80211_CHAN_WIDTH_80:
2875                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2876                 break;
2877         case NL80211_CHAN_WIDTH_160:
2878                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2879                 break;
2880         case NL80211_CHAN_WIDTH_80P80:
2881                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2882                 break;
2883         default:
2884                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2885         }
2886
2887         /* new center frequency segment 0 */
2888         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2889         /* new center frequency segment 1 */
2890         if (chandef->center_freq2)
2891                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2892         else
2893                 *pos++ = 0;
2894 }
2895
2896 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2897                                 const struct cfg80211_chan_def *chandef)
2898 {
2899         struct ieee80211_vht_operation *vht_oper;
2900
2901         *pos++ = WLAN_EID_VHT_OPERATION;
2902         *pos++ = sizeof(struct ieee80211_vht_operation);
2903         vht_oper = (struct ieee80211_vht_operation *)pos;
2904         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2905                                                         chandef->center_freq1);
2906         if (chandef->center_freq2)
2907                 vht_oper->center_freq_seg1_idx =
2908                         ieee80211_frequency_to_channel(chandef->center_freq2);
2909         else
2910                 vht_oper->center_freq_seg1_idx = 0x00;
2911
2912         switch (chandef->width) {
2913         case NL80211_CHAN_WIDTH_160:
2914                 /*
2915                  * Convert 160 MHz channel width to new style as interop
2916                  * workaround.
2917                  */
2918                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2919                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2920                 if (chandef->chan->center_freq < chandef->center_freq1)
2921                         vht_oper->center_freq_seg0_idx -= 8;
2922                 else
2923                         vht_oper->center_freq_seg0_idx += 8;
2924                 break;
2925         case NL80211_CHAN_WIDTH_80P80:
2926                 /*
2927                  * Convert 80+80 MHz channel width to new style as interop
2928                  * workaround.
2929                  */
2930                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2931                 break;
2932         case NL80211_CHAN_WIDTH_80:
2933                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2934                 break;
2935         default:
2936                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2937                 break;
2938         }
2939
2940         /* don't require special VHT peer rates */
2941         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2942
2943         return pos + sizeof(struct ieee80211_vht_operation);
2944 }
2945
2946 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2947 {
2948         struct ieee80211_he_operation *he_oper;
2949         u32 he_oper_params;
2950
2951         *pos++ = WLAN_EID_EXTENSION;
2952         *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2953         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2954
2955         he_oper_params = 0;
2956         he_oper_params |= u32_encode_bits(1023, /* disabled */
2957                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2958         he_oper_params |= u32_encode_bits(1,
2959                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2960         he_oper_params |= u32_encode_bits(1,
2961                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2962
2963         he_oper = (struct ieee80211_he_operation *)pos;
2964         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2965
2966         /* don't require special HE peer rates */
2967         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2968
2969         /* TODO add VHT operational and 6GHz operational subelement? */
2970
2971         return pos + sizeof(struct ieee80211_vht_operation);
2972 }
2973
2974 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2975                                struct cfg80211_chan_def *chandef)
2976 {
2977         enum nl80211_channel_type channel_type;
2978
2979         if (!ht_oper)
2980                 return false;
2981
2982         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2983         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2984                 channel_type = NL80211_CHAN_HT20;
2985                 break;
2986         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2987                 channel_type = NL80211_CHAN_HT40PLUS;
2988                 break;
2989         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2990                 channel_type = NL80211_CHAN_HT40MINUS;
2991                 break;
2992         default:
2993                 channel_type = NL80211_CHAN_NO_HT;
2994                 return false;
2995         }
2996
2997         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2998         return true;
2999 }
3000
3001 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3002                                 const struct ieee80211_vht_operation *oper,
3003                                 const struct ieee80211_ht_operation *htop,
3004                                 struct cfg80211_chan_def *chandef)
3005 {
3006         struct cfg80211_chan_def new = *chandef;
3007         int cf0, cf1;
3008         int ccfs0, ccfs1, ccfs2;
3009         int ccf0, ccf1;
3010
3011         if (!oper || !htop)
3012                 return false;
3013
3014         ccfs0 = oper->center_freq_seg0_idx;
3015         ccfs1 = oper->center_freq_seg1_idx;
3016         ccfs2 = (le16_to_cpu(htop->operation_mode) &
3017                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3018                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3019
3020         /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3021         ccf0 = ccfs0;
3022         ccf1 = ccfs1;
3023         if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3024                 ccf1 = ccfs2;
3025
3026         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3027         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3028
3029         switch (oper->chan_width) {
3030         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3031                 /* just use HT information directly */
3032                 break;
3033         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3034                 new.width = NL80211_CHAN_WIDTH_80;
3035                 new.center_freq1 = cf0;
3036                 /* If needed, adjust based on the newer interop workaround. */
3037                 if (ccf1) {
3038                         unsigned int diff;
3039
3040                         diff = abs(ccf1 - ccf0);
3041                         if (diff == 8) {
3042                                 new.width = NL80211_CHAN_WIDTH_160;
3043                                 new.center_freq1 = cf1;
3044                         } else if (diff > 8) {
3045                                 new.width = NL80211_CHAN_WIDTH_80P80;
3046                                 new.center_freq2 = cf1;
3047                         }
3048                 }
3049                 break;
3050         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3051                 /* deprecated encoding */
3052                 new.width = NL80211_CHAN_WIDTH_160;
3053                 new.center_freq1 = cf0;
3054                 break;
3055         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3056                 /* deprecated encoding */
3057                 new.width = NL80211_CHAN_WIDTH_80P80;
3058                 new.center_freq1 = cf0;
3059                 new.center_freq2 = cf1;
3060                 break;
3061         default:
3062                 return false;
3063         }
3064
3065         if (!cfg80211_chandef_valid(&new))
3066                 return false;
3067
3068         *chandef = new;
3069         return true;
3070 }
3071
3072 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3073                              const struct ieee80211_supported_band *sband,
3074                              const u8 *srates, int srates_len, u32 *rates)
3075 {
3076         u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3077         int shift = ieee80211_chandef_get_shift(chandef);
3078         struct ieee80211_rate *br;
3079         int brate, rate, i, j, count = 0;
3080
3081         *rates = 0;
3082
3083         for (i = 0; i < srates_len; i++) {
3084                 rate = srates[i] & 0x7f;
3085
3086                 for (j = 0; j < sband->n_bitrates; j++) {
3087                         br = &sband->bitrates[j];
3088                         if ((rate_flags & br->flags) != rate_flags)
3089                                 continue;
3090
3091                         brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3092                         if (brate == rate) {
3093                                 *rates |= BIT(j);
3094                                 count++;
3095                                 break;
3096                         }
3097                 }
3098         }
3099         return count;
3100 }
3101
3102 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3103                             struct sk_buff *skb, bool need_basic,
3104                             enum nl80211_band band)
3105 {
3106         struct ieee80211_local *local = sdata->local;
3107         struct ieee80211_supported_band *sband;
3108         int rate, shift;
3109         u8 i, rates, *pos;
3110         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3111         u32 rate_flags;
3112
3113         shift = ieee80211_vif_get_shift(&sdata->vif);
3114         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3115         sband = local->hw.wiphy->bands[band];
3116         rates = 0;
3117         for (i = 0; i < sband->n_bitrates; i++) {
3118                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3119                         continue;
3120                 rates++;
3121         }
3122         if (rates > 8)
3123                 rates = 8;
3124
3125         if (skb_tailroom(skb) < rates + 2)
3126                 return -ENOMEM;
3127
3128         pos = skb_put(skb, rates + 2);
3129         *pos++ = WLAN_EID_SUPP_RATES;
3130         *pos++ = rates;
3131         for (i = 0; i < rates; i++) {
3132                 u8 basic = 0;
3133                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3134                         continue;
3135
3136                 if (need_basic && basic_rates & BIT(i))
3137                         basic = 0x80;
3138                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3139                                     5 * (1 << shift));
3140                 *pos++ = basic | (u8) rate;
3141         }
3142
3143         return 0;
3144 }
3145
3146 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3147                                 struct sk_buff *skb, bool need_basic,
3148                                 enum nl80211_band band)
3149 {
3150         struct ieee80211_local *local = sdata->local;
3151         struct ieee80211_supported_band *sband;
3152         int rate, shift;
3153         u8 i, exrates, *pos;
3154         u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3155         u32 rate_flags;
3156
3157         rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3158         shift = ieee80211_vif_get_shift(&sdata->vif);
3159
3160         sband = local->hw.wiphy->bands[band];
3161         exrates = 0;
3162         for (i = 0; i < sband->n_bitrates; i++) {
3163                 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3164                         continue;
3165                 exrates++;
3166         }
3167
3168         if (exrates > 8)
3169                 exrates -= 8;
3170         else
3171                 exrates = 0;
3172
3173         if (skb_tailroom(skb) < exrates + 2)
3174                 return -ENOMEM;
3175
3176         if (exrates) {
3177                 pos = skb_put(skb, exrates + 2);
3178                 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3179                 *pos++ = exrates;
3180                 for (i = 8; i < sband->n_bitrates; i++) {
3181                         u8 basic = 0;
3182                         if ((rate_flags & sband->bitrates[i].flags)
3183                             != rate_flags)
3184                                 continue;
3185                         if (need_basic && basic_rates & BIT(i))
3186                                 basic = 0x80;
3187                         rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3188                                             5 * (1 << shift));
3189                         *pos++ = basic | (u8) rate;
3190                 }
3191         }
3192         return 0;
3193 }
3194
3195 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3196 {
3197         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3198         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3199
3200         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3201                 /* non-managed type inferfaces */
3202                 return 0;
3203         }
3204         return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3205 }
3206 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3207
3208 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3209 {
3210         if (!mcs)
3211                 return 1;
3212
3213         /* TODO: consider rx_highest */
3214
3215         if (mcs->rx_mask[3])
3216                 return 4;
3217         if (mcs->rx_mask[2])
3218                 return 3;
3219         if (mcs->rx_mask[1])
3220                 return 2;
3221         return 1;
3222 }
3223
3224 /**
3225  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3226  * @local: mac80211 hw info struct
3227  * @status: RX status
3228  * @mpdu_len: total MPDU length (including FCS)
3229  * @mpdu_offset: offset into MPDU to calculate timestamp at
3230  *
3231  * This function calculates the RX timestamp at the given MPDU offset, taking
3232  * into account what the RX timestamp was. An offset of 0 will just normalize
3233  * the timestamp to TSF at beginning of MPDU reception.
3234  */
3235 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3236                                      struct ieee80211_rx_status *status,
3237                                      unsigned int mpdu_len,
3238                                      unsigned int mpdu_offset)
3239 {
3240         u64 ts = status->mactime;
3241         struct rate_info ri;
3242         u16 rate;
3243
3244         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3245                 return 0;
3246
3247         memset(&ri, 0, sizeof(ri));
3248
3249         ri.bw = status->bw;
3250
3251         /* Fill cfg80211 rate info */
3252         switch (status->encoding) {
3253         case RX_ENC_HT:
3254                 ri.mcs = status->rate_idx;
3255                 ri.flags |= RATE_INFO_FLAGS_MCS;
3256                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3257                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3258                 break;
3259         case RX_ENC_VHT:
3260                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3261                 ri.mcs = status->rate_idx;
3262                 ri.nss = status->nss;
3263                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3264                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3265                 break;
3266         default:
3267                 WARN_ON(1);
3268                 /* fall through */
3269         case RX_ENC_LEGACY: {
3270                 struct ieee80211_supported_band *sband;
3271                 int shift = 0;
3272                 int bitrate;
3273
3274                 switch (status->bw) {
3275                 case RATE_INFO_BW_10:
3276                         shift = 1;
3277                         break;
3278                 case RATE_INFO_BW_5:
3279                         shift = 2;
3280                         break;
3281                 }
3282
3283                 sband = local->hw.wiphy->bands[status->band];
3284                 bitrate = sband->bitrates[status->rate_idx].bitrate;
3285                 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3286
3287                 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3288                         /* TODO: handle HT/VHT preambles */
3289                         if (status->band == NL80211_BAND_5GHZ) {
3290                                 ts += 20 << shift;
3291                                 mpdu_offset += 2;
3292                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3293                                 ts += 96;
3294                         } else {
3295                                 ts += 192;
3296                         }
3297                 }
3298                 break;
3299                 }
3300         }
3301
3302         rate = cfg80211_calculate_bitrate(&ri);
3303         if (WARN_ONCE(!rate,
3304                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3305                       (unsigned long long)status->flag, status->rate_idx,
3306                       status->nss))
3307                 return 0;
3308
3309         /* rewind from end of MPDU */
3310         if (status->flag & RX_FLAG_MACTIME_END)
3311                 ts -= mpdu_len * 8 * 10 / rate;
3312
3313         ts += mpdu_offset * 8 * 10 / rate;
3314
3315         return ts;
3316 }
3317
3318 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3319 {
3320         struct ieee80211_sub_if_data *sdata;
3321         struct cfg80211_chan_def chandef;
3322
3323         /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3324         ASSERT_RTNL();
3325
3326         mutex_lock(&local->mtx);
3327         list_for_each_entry(sdata, &local->interfaces, list) {
3328                 /* it might be waiting for the local->mtx, but then
3329                  * by the time it gets it, sdata->wdev.cac_started
3330                  * will no longer be true
3331                  */
3332                 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3333
3334                 if (sdata->wdev.cac_started) {
3335                         chandef = sdata->vif.bss_conf.chandef;
3336                         ieee80211_vif_release_channel(sdata);
3337                         cfg80211_cac_event(sdata->dev,
3338                                            &chandef,
3339                                            NL80211_RADAR_CAC_ABORTED,
3340                                            GFP_KERNEL);
3341                 }
3342         }
3343         mutex_unlock(&local->mtx);
3344 }
3345
3346 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3347 {
3348         struct ieee80211_local *local =
3349                 container_of(work, struct ieee80211_local, radar_detected_work);
3350         struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3351         struct ieee80211_chanctx *ctx;
3352         int num_chanctx = 0;
3353
3354         mutex_lock(&local->chanctx_mtx);
3355         list_for_each_entry(ctx, &local->chanctx_list, list) {
3356                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3357                         continue;
3358
3359                 num_chanctx++;
3360                 chandef = ctx->conf.def;
3361         }
3362         mutex_unlock(&local->chanctx_mtx);
3363
3364         rtnl_lock();
3365         ieee80211_dfs_cac_cancel(local);
3366         rtnl_unlock();
3367
3368         if (num_chanctx > 1)
3369                 /* XXX: multi-channel is not supported yet */
3370                 WARN_ON(1);
3371         else
3372                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3373 }
3374
3375 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3376 {
3377         struct ieee80211_local *local = hw_to_local(hw);
3378
3379         trace_api_radar_detected(local);
3380
3381         schedule_work(&local->radar_detected_work);
3382 }
3383 EXPORT_SYMBOL(ieee80211_radar_detected);
3384
3385 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3386 {
3387         u32 ret;
3388         int tmp;
3389
3390         switch (c->width) {
3391         case NL80211_CHAN_WIDTH_20:
3392                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3393                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3394                 break;
3395         case NL80211_CHAN_WIDTH_40:
3396                 c->width = NL80211_CHAN_WIDTH_20;
3397                 c->center_freq1 = c->chan->center_freq;
3398                 ret = IEEE80211_STA_DISABLE_40MHZ |
3399                       IEEE80211_STA_DISABLE_VHT;
3400                 break;
3401         case NL80211_CHAN_WIDTH_80:
3402                 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3403                 /* n_P40 */
3404                 tmp /= 2;
3405                 /* freq_P40 */
3406                 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3407                 c->width = NL80211_CHAN_WIDTH_40;
3408                 ret = IEEE80211_STA_DISABLE_VHT;
3409                 break;
3410         case NL80211_CHAN_WIDTH_80P80:
3411                 c->center_freq2 = 0;
3412                 c->width = NL80211_CHAN_WIDTH_80;
3413                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3414                       IEEE80211_STA_DISABLE_160MHZ;
3415                 break;
3416         case NL80211_CHAN_WIDTH_160:
3417                 /* n_P20 */
3418                 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3419                 /* n_P80 */
3420                 tmp /= 4;
3421                 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3422                 c->width = NL80211_CHAN_WIDTH_80;
3423                 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3424                       IEEE80211_STA_DISABLE_160MHZ;
3425                 break;
3426         default:
3427         case NL80211_CHAN_WIDTH_20_NOHT:
3428                 WARN_ON_ONCE(1);
3429                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3430                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3431                 break;
3432         case NL80211_CHAN_WIDTH_5:
3433         case NL80211_CHAN_WIDTH_10:
3434                 WARN_ON_ONCE(1);
3435                 /* keep c->width */
3436                 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3437                 break;
3438         }
3439
3440         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3441
3442         return ret;
3443 }
3444
3445 /*
3446  * Returns true if smps_mode_new is strictly more restrictive than
3447  * smps_mode_old.
3448  */
3449 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3450                                    enum ieee80211_smps_mode smps_mode_new)
3451 {
3452         if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3453                          smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3454                 return false;
3455
3456         switch (smps_mode_old) {
3457         case IEEE80211_SMPS_STATIC:
3458                 return false;
3459         case IEEE80211_SMPS_DYNAMIC:
3460                 return smps_mode_new == IEEE80211_SMPS_STATIC;
3461         case IEEE80211_SMPS_OFF:
3462                 return smps_mode_new != IEEE80211_SMPS_OFF;
3463         default:
3464                 WARN_ON(1);
3465         }
3466
3467         return false;
3468 }
3469
3470 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3471                               struct cfg80211_csa_settings *csa_settings)
3472 {
3473         struct sk_buff *skb;
3474         struct ieee80211_mgmt *mgmt;
3475         struct ieee80211_local *local = sdata->local;
3476         int freq;
3477         int hdr_len = offsetofend(struct ieee80211_mgmt,
3478                                   u.action.u.chan_switch);
3479         u8 *pos;
3480
3481         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3482             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3483                 return -EOPNOTSUPP;
3484
3485         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3486                             5 + /* channel switch announcement element */
3487                             3 + /* secondary channel offset element */
3488                             5 + /* wide bandwidth channel switch announcement */
3489                             8); /* mesh channel switch parameters element */
3490         if (!skb)
3491                 return -ENOMEM;
3492
3493         skb_reserve(skb, local->tx_headroom);
3494         mgmt = skb_put_zero(skb, hdr_len);
3495         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3496                                           IEEE80211_STYPE_ACTION);
3497
3498         eth_broadcast_addr(mgmt->da);
3499         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3500         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3501                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3502         } else {
3503                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3504                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3505         }
3506         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3507         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3508         pos = skb_put(skb, 5);
3509         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3510         *pos++ = 3;                                             /* IE length */
3511         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3512         freq = csa_settings->chandef.chan->center_freq;
3513         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3514         *pos++ = csa_settings->count;                           /* count */
3515
3516         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3517                 enum nl80211_channel_type ch_type;
3518
3519                 skb_put(skb, 3);
3520                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3521                 *pos++ = 1;                                     /* IE length */
3522                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3523                 if (ch_type == NL80211_CHAN_HT40PLUS)
3524                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3525                 else
3526                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3527         }
3528
3529         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3530                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3531
3532                 skb_put(skb, 8);
3533                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3534                 *pos++ = 6;                                     /* IE length */
3535                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3536                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3537                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3538                 *pos++ |= csa_settings->block_tx ?
3539                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3540                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3541                 pos += 2;
3542                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3543                 pos += 2;
3544         }
3545
3546         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3547             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3548             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3549                 skb_put(skb, 5);
3550                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3551         }
3552
3553         ieee80211_tx_skb(sdata, skb);
3554         return 0;
3555 }
3556
3557 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3558 {
3559         return !(cs == NULL || cs->cipher == 0 ||
3560                  cs->hdr_len < cs->pn_len + cs->pn_off ||
3561                  cs->hdr_len <= cs->key_idx_off ||
3562                  cs->key_idx_shift > 7 ||
3563                  cs->key_idx_mask == 0);
3564 }
3565
3566 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3567 {
3568         int i;
3569
3570         /* Ensure we have enough iftype bitmap space for all iftype values */
3571         WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3572
3573         for (i = 0; i < n; i++)
3574                 if (!ieee80211_cs_valid(&cs[i]))
3575                         return false;
3576
3577         return true;
3578 }
3579
3580 const struct ieee80211_cipher_scheme *
3581 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3582                  enum nl80211_iftype iftype)
3583 {
3584         const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3585         int n = local->hw.n_cipher_schemes;
3586         int i;
3587         const struct ieee80211_cipher_scheme *cs = NULL;
3588
3589         for (i = 0; i < n; i++) {
3590                 if (l[i].cipher == cipher) {
3591                         cs = &l[i];
3592                         break;
3593                 }
3594         }
3595
3596         if (!cs || !(cs->iftype & BIT(iftype)))
3597                 return NULL;
3598
3599         return cs;
3600 }
3601
3602 int ieee80211_cs_headroom(struct ieee80211_local *local,
3603                           struct cfg80211_crypto_settings *crypto,
3604                           enum nl80211_iftype iftype)
3605 {
3606         const struct ieee80211_cipher_scheme *cs;
3607         int headroom = IEEE80211_ENCRYPT_HEADROOM;
3608         int i;
3609
3610         for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3611                 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3612                                       iftype);
3613
3614                 if (cs && headroom < cs->hdr_len)
3615                         headroom = cs->hdr_len;
3616         }
3617
3618         cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3619         if (cs && headroom < cs->hdr_len)
3620                 headroom = cs->hdr_len;
3621
3622         return headroom;
3623 }
3624
3625 static bool
3626 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3627 {
3628         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3629         int skip;
3630
3631         if (end > 0)
3632                 return false;
3633
3634         /* One shot NOA  */
3635         if (data->count[i] == 1)
3636                 return false;
3637
3638         if (data->desc[i].interval == 0)
3639                 return false;
3640
3641         /* End time is in the past, check for repetitions */
3642         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3643         if (data->count[i] < 255) {
3644                 if (data->count[i] <= skip) {
3645                         data->count[i] = 0;
3646                         return false;
3647                 }
3648
3649                 data->count[i] -= skip;
3650         }
3651
3652         data->desc[i].start += skip * data->desc[i].interval;
3653
3654         return true;
3655 }
3656
3657 static bool
3658 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3659                              s32 *offset)
3660 {
3661         bool ret = false;
3662         int i;
3663
3664         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3665                 s32 cur;
3666
3667                 if (!data->count[i])
3668                         continue;
3669
3670                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3671                         ret = true;
3672
3673                 cur = data->desc[i].start - tsf;
3674                 if (cur > *offset)
3675                         continue;
3676
3677                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3678                 if (cur > *offset)
3679                         *offset = cur;
3680         }
3681
3682         return ret;
3683 }
3684
3685 static u32
3686 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3687 {
3688         s32 offset = 0;
3689         int tries = 0;
3690         /*
3691          * arbitrary limit, used to avoid infinite loops when combined NoA
3692          * descriptors cover the full time period.
3693          */
3694         int max_tries = 5;
3695
3696         ieee80211_extend_absent_time(data, tsf, &offset);
3697         do {
3698                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3699                         break;
3700
3701                 tries++;
3702         } while (tries < max_tries);
3703
3704         return offset;
3705 }
3706
3707 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3708 {
3709         u32 next_offset = BIT(31) - 1;
3710         int i;
3711
3712         data->absent = 0;
3713         data->has_next_tsf = false;
3714         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3715                 s32 start;
3716
3717                 if (!data->count[i])
3718                         continue;
3719
3720                 ieee80211_extend_noa_desc(data, tsf, i);
3721                 start = data->desc[i].start - tsf;
3722                 if (start <= 0)
3723                         data->absent |= BIT(i);
3724
3725                 if (next_offset > start)
3726                         next_offset = start;
3727
3728                 data->has_next_tsf = true;
3729         }
3730
3731         if (data->absent)
3732                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3733
3734         data->next_tsf = tsf + next_offset;
3735 }
3736 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3737
3738 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3739                             struct ieee80211_noa_data *data, u32 tsf)
3740 {
3741         int ret = 0;
3742         int i;
3743
3744         memset(data, 0, sizeof(*data));
3745
3746         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3747                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3748
3749                 if (!desc->count || !desc->duration)
3750                         continue;
3751
3752                 data->count[i] = desc->count;
3753                 data->desc[i].start = le32_to_cpu(desc->start_time);
3754                 data->desc[i].duration = le32_to_cpu(desc->duration);
3755                 data->desc[i].interval = le32_to_cpu(desc->interval);
3756
3757                 if (data->count[i] > 1 &&
3758                     data->desc[i].interval < data->desc[i].duration)
3759                         continue;
3760
3761                 ieee80211_extend_noa_desc(data, tsf, i);
3762                 ret++;
3763         }
3764
3765         if (ret)
3766                 ieee80211_update_p2p_noa(data, tsf);
3767
3768         return ret;
3769 }
3770 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3771
3772 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3773                            struct ieee80211_sub_if_data *sdata)
3774 {
3775         u64 tsf = drv_get_tsf(local, sdata);
3776         u64 dtim_count = 0;
3777         u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3778         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3779         struct ps_data *ps;
3780         u8 bcns_from_dtim;
3781
3782         if (tsf == -1ULL || !beacon_int || !dtim_period)
3783                 return;
3784
3785         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3786             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3787                 if (!sdata->bss)
3788                         return;
3789
3790                 ps = &sdata->bss->ps;
3791         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3792                 ps = &sdata->u.mesh.ps;
3793         } else {
3794                 return;
3795         }
3796
3797         /*
3798          * actually finds last dtim_count, mac80211 will update in
3799          * __beacon_add_tim().
3800          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3801          */
3802         do_div(tsf, beacon_int);
3803         bcns_from_dtim = do_div(tsf, dtim_period);
3804         /* just had a DTIM */
3805         if (!bcns_from_dtim)
3806                 dtim_count = 0;
3807         else
3808                 dtim_count = dtim_period - bcns_from_dtim;
3809
3810         ps->dtim_count = dtim_count;
3811 }
3812
3813 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3814                                          struct ieee80211_chanctx *ctx)
3815 {
3816         struct ieee80211_sub_if_data *sdata;
3817         u8 radar_detect = 0;
3818
3819         lockdep_assert_held(&local->chanctx_mtx);
3820
3821         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3822                 return 0;
3823
3824         list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3825                 if (sdata->reserved_radar_required)
3826                         radar_detect |= BIT(sdata->reserved_chandef.width);
3827
3828         /*
3829          * An in-place reservation context should not have any assigned vifs
3830          * until it replaces the other context.
3831          */
3832         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3833                 !list_empty(&ctx->assigned_vifs));
3834
3835         list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3836                 if (sdata->radar_required)
3837                         radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3838
3839         return radar_detect;
3840 }
3841
3842 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3843                                  const struct cfg80211_chan_def *chandef,
3844                                  enum ieee80211_chanctx_mode chanmode,
3845                                  u8 radar_detect)
3846 {
3847         struct ieee80211_local *local = sdata->local;
3848         struct ieee80211_sub_if_data *sdata_iter;
3849         enum nl80211_iftype iftype = sdata->wdev.iftype;
3850         struct ieee80211_chanctx *ctx;
3851         int total = 1;
3852         struct iface_combination_params params = {
3853                 .radar_detect = radar_detect,
3854         };
3855
3856         lockdep_assert_held(&local->chanctx_mtx);
3857
3858         if (WARN_ON(hweight32(radar_detect) > 1))
3859                 return -EINVAL;
3860
3861         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3862                     !chandef->chan))
3863                 return -EINVAL;
3864
3865         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3866                 return -EINVAL;
3867
3868         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3869             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3870                 /*
3871                  * always passing this is harmless, since it'll be the
3872                  * same value that cfg80211 finds if it finds the same
3873                  * interface ... and that's always allowed
3874                  */
3875                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3876         }
3877
3878         /* Always allow software iftypes */
3879         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3880                 if (radar_detect)
3881                         return -EINVAL;
3882                 return 0;
3883         }
3884
3885         if (chandef)
3886                 params.num_different_channels = 1;
3887
3888         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3889                 params.iftype_num[iftype] = 1;
3890
3891         list_for_each_entry(ctx, &local->chanctx_list, list) {
3892                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3893                         continue;
3894                 params.radar_detect |=
3895                         ieee80211_chanctx_radar_detect(local, ctx);
3896                 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3897                         params.num_different_channels++;
3898                         continue;
3899                 }
3900                 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3901                     cfg80211_chandef_compatible(chandef,
3902                                                 &ctx->conf.def))
3903                         continue;
3904                 params.num_different_channels++;
3905         }
3906
3907         list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3908                 struct wireless_dev *wdev_iter;
3909
3910                 wdev_iter = &sdata_iter->wdev;
3911
3912                 if (sdata_iter == sdata ||
3913                     !ieee80211_sdata_running(sdata_iter) ||
3914                     cfg80211_iftype_allowed(local->hw.wiphy,
3915                                             wdev_iter->iftype, 0, 1))
3916                         continue;
3917
3918                 params.iftype_num[wdev_iter->iftype]++;
3919                 total++;
3920         }
3921
3922         if (total == 1 && !params.radar_detect)
3923                 return 0;
3924
3925         return cfg80211_check_combinations(local->hw.wiphy, &params);
3926 }
3927
3928 static void
3929 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3930                          void *data)
3931 {
3932         u32 *max_num_different_channels = data;
3933
3934         *max_num_different_channels = max(*max_num_different_channels,
3935                                           c->num_different_channels);
3936 }
3937
3938 int ieee80211_max_num_channels(struct ieee80211_local *local)
3939 {
3940         struct ieee80211_sub_if_data *sdata;
3941         struct ieee80211_chanctx *ctx;
3942         u32 max_num_different_channels = 1;
3943         int err;
3944         struct iface_combination_params params = {0};
3945
3946         lockdep_assert_held(&local->chanctx_mtx);
3947
3948         list_for_each_entry(ctx, &local->chanctx_list, list) {
3949                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3950                         continue;
3951
3952                 params.num_different_channels++;
3953
3954                 params.radar_detect |=
3955                         ieee80211_chanctx_radar_detect(local, ctx);
3956         }
3957
3958         list_for_each_entry_rcu(sdata, &local->interfaces, list)
3959                 params.iftype_num[sdata->wdev.iftype]++;
3960
3961         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
3962                                          ieee80211_iter_max_chans,
3963                                          &max_num_different_channels);
3964         if (err < 0)
3965                 return err;
3966
3967         return max_num_different_channels;
3968 }
3969
3970 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3971 {
3972         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3973         *buf++ = 7; /* len */
3974         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3975         *buf++ = 0x50;
3976         *buf++ = 0xf2;
3977         *buf++ = 2; /* WME */
3978         *buf++ = 0; /* WME info */
3979         *buf++ = 1; /* WME ver */
3980         *buf++ = qosinfo; /* U-APSD no in use */
3981
3982         return buf;
3983 }
3984
3985 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3986                              unsigned long *frame_cnt,
3987                              unsigned long *byte_cnt)
3988 {
3989         struct txq_info *txqi = to_txq_info(txq);
3990         u32 frag_cnt = 0, frag_bytes = 0;
3991         struct sk_buff *skb;
3992
3993         skb_queue_walk(&txqi->frags, skb) {
3994                 frag_cnt++;
3995                 frag_bytes += skb->len;
3996         }
3997
3998         if (frame_cnt)
3999                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4000
4001         if (byte_cnt)
4002                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4003 }
4004 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4005
4006 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4007         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4008         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4009         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4010         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4011 };