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) 2018-2025 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 #include <kunit/visibility.h>
  28
  29 #include "ieee80211_i.h"
  30 #include "driver-ops.h"
  31 #include "rate.h"
  32 #include "mesh.h"
  33 #include "wme.h"
  34 #include "led.h"
  35 #include "wep.h"
  36
  37 /* privid for wiphys to determine whether they belong to us or not */
  38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
  39
  40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
  41 {
  42         struct ieee80211_local *local;
  43
  44         local = wiphy_priv(wiphy);
  45         return &local->hw;
  46 }
  47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
  48
  49 const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = {
  50         .mode = IEEE80211_CONN_MODE_EHT,
  51         .bw_limit = IEEE80211_CONN_BW_LIMIT_320,
  52 };
  53
  54 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
  55                         enum nl80211_iftype type)
  56 {
  57         __le16 fc = hdr->frame_control;
  58
  59         if (ieee80211_is_data(fc)) {
  60                 if (len < 24) /* drop incorrect hdr len (data) */
  61                         return NULL;
  62
  63                 if (ieee80211_has_a4(fc))
  64                         return NULL;
  65                 if (ieee80211_has_tods(fc))
  66                         return hdr->addr1;
  67                 if (ieee80211_has_fromds(fc))
  68                         return hdr->addr2;
  69
  70                 return hdr->addr3;
  71         }
  72
  73         if (ieee80211_is_s1g_beacon(fc)) {
  74                 struct ieee80211_ext *ext = (void *) hdr;
  75
  76                 return ext->u.s1g_beacon.sa;
  77         }
  78
  79         if (ieee80211_is_mgmt(fc)) {
  80                 if (len < 24) /* drop incorrect hdr len (mgmt) */
  81                         return NULL;
  82                 return hdr->addr3;
  83         }
  84
  85         if (ieee80211_is_ctl(fc)) {
  86                 if (ieee80211_is_pspoll(fc))
  87                         return hdr->addr1;
  88
  89                 if (ieee80211_is_back_req(fc)) {
  90                         switch (type) {
  91                         case NL80211_IFTYPE_STATION:
  92                                 return hdr->addr2;
  93                         case NL80211_IFTYPE_AP:
  94                         case NL80211_IFTYPE_AP_VLAN:
  95                                 return hdr->addr1;
  96                         default:
  97                                 break; /* fall through to the return */
  98                         }
  99                 }
 100         }
 101
 102         return NULL;
 103 }
 104 EXPORT_SYMBOL(ieee80211_get_bssid);
 105
 106 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
 107 {
 108         struct sk_buff *skb;
 109         struct ieee80211_hdr *hdr;
 110
 111         skb_queue_walk(&tx->skbs, skb) {
 112                 hdr = (struct ieee80211_hdr *) skb->data;
 113                 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
 114         }
 115 }
 116
 117 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
 118                              int rate, int erp, int short_preamble)
 119 {
 120         int dur;
 121
 122         /* calculate duration (in microseconds, rounded up to next higher
 123          * integer if it includes a fractional microsecond) to send frame of
 124          * len bytes (does not include FCS) at the given rate. Duration will
 125          * also include SIFS.
 126          *
 127          * rate is in 100 kbps, so divident is multiplied by 10 in the
 128          * DIV_ROUND_UP() operations.
 129          */
 130
 131         if (band == NL80211_BAND_5GHZ || erp) {
 132                 /*
 133                  * OFDM:
 134                  *
 135                  * N_DBPS = DATARATE x 4
 136                  * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
 137                  *      (16 = SIGNAL time, 6 = tail bits)
 138                  * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
 139                  *
 140                  * T_SYM = 4 usec
 141                  * 802.11a - 18.5.2: aSIFSTime = 16 usec
 142                  * 802.11g - 19.8.4: aSIFSTime = 10 usec +
 143                  *      signal ext = 6 usec
 144                  */
 145                 dur = 16; /* SIFS + signal ext */
 146                 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
 147                 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
 148
 149                 /* rates should already consider the channel bandwidth,
 150                  * don't apply divisor again.
 151                  */
 152                 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
 153                                         4 * rate); /* T_SYM x N_SYM */
 154         } else {
 155                 /*
 156                  * 802.11b or 802.11g with 802.11b compatibility:
 157                  * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
 158                  * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
 159                  *
 160                  * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
 161                  * aSIFSTime = 10 usec
 162                  * aPreambleLength = 144 usec or 72 usec with short preamble
 163                  * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
 164                  */
 165                 dur = 10; /* aSIFSTime = 10 usec */
 166                 dur += short_preamble ? (72 + 24) : (144 + 48);
 167
 168                 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
 169         }
 170
 171         return dur;
 172 }
 173
 174 /* Exported duration function for driver use */
 175 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
 176                                         struct ieee80211_vif *vif,
 177                                         enum nl80211_band band,
 178                                         size_t frame_len,
 179                                         struct ieee80211_rate *rate)
 180 {
 181         struct ieee80211_sub_if_data *sdata;
 182         u16 dur;
 183         int erp;
 184         bool short_preamble = false;
 185
 186         erp = 0;
 187         if (vif) {
 188                 sdata = vif_to_sdata(vif);
 189                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 190                 if (sdata->deflink.operating_11g_mode)
 191                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 192         }
 193
 194         dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
 195                                        short_preamble);
 196
 197         return cpu_to_le16(dur);
 198 }
 199 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
 200
 201 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
 202                               struct ieee80211_vif *vif, size_t frame_len,
 203                               const struct ieee80211_tx_info *frame_txctl)
 204 {
 205         struct ieee80211_local *local = hw_to_local(hw);
 206         struct ieee80211_rate *rate;
 207         struct ieee80211_sub_if_data *sdata;
 208         bool short_preamble;
 209         int erp, bitrate;
 210         u16 dur;
 211         struct ieee80211_supported_band *sband;
 212
 213         sband = local->hw.wiphy->bands[frame_txctl->band];
 214
 215         short_preamble = false;
 216
 217         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 218
 219         erp = 0;
 220         if (vif) {
 221                 sdata = vif_to_sdata(vif);
 222                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 223                 if (sdata->deflink.operating_11g_mode)
 224                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 225         }
 226
 227         bitrate = rate->bitrate;
 228
 229         /* CTS duration */
 230         dur = ieee80211_frame_duration(sband->band, 10, bitrate,
 231                                        erp, short_preamble);
 232         /* Data frame duration */
 233         dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
 234                                         erp, short_preamble);
 235         /* ACK duration */
 236         dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 237                                         erp, short_preamble);
 238
 239         return cpu_to_le16(dur);
 240 }
 241 EXPORT_SYMBOL(ieee80211_rts_duration);
 242
 243 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
 244                                     struct ieee80211_vif *vif,
 245                                     size_t frame_len,
 246                                     const struct ieee80211_tx_info *frame_txctl)
 247 {
 248         struct ieee80211_local *local = hw_to_local(hw);
 249         struct ieee80211_rate *rate;
 250         struct ieee80211_sub_if_data *sdata;
 251         bool short_preamble;
 252         int erp, bitrate;
 253         u16 dur;
 254         struct ieee80211_supported_band *sband;
 255
 256         sband = local->hw.wiphy->bands[frame_txctl->band];
 257
 258         short_preamble = false;
 259
 260         rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
 261         erp = 0;
 262         if (vif) {
 263                 sdata = vif_to_sdata(vif);
 264                 short_preamble = sdata->vif.bss_conf.use_short_preamble;
 265                 if (sdata->deflink.operating_11g_mode)
 266                         erp = rate->flags & IEEE80211_RATE_ERP_G;
 267         }
 268
 269         bitrate = rate->bitrate;
 270
 271         /* Data frame duration */
 272         dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
 273                                        erp, short_preamble);
 274         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
 275                 /* ACK duration */
 276                 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
 277                                                 erp, short_preamble);
 278         }
 279
 280         return cpu_to_le16(dur);
 281 }
 282 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
 283
 284 static void wake_tx_push_queue(struct ieee80211_local *local,
 285                                struct ieee80211_sub_if_data *sdata,
 286                                struct ieee80211_txq *queue)
 287 {
 288         struct ieee80211_tx_control control = {
 289                 .sta = queue->sta,
 290         };
 291         struct sk_buff *skb;
 292
 293         while (1) {
 294                 skb = ieee80211_tx_dequeue(&local->hw, queue);
 295                 if (!skb)
 296                         break;
 297
 298                 drv_tx(local, &control, skb);
 299         }
 300 }
 301
 302 /* wake_tx_queue handler for driver not implementing a custom one*/
 303 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw,
 304                                     struct ieee80211_txq *txq)
 305 {
 306         struct ieee80211_local *local = hw_to_local(hw);
 307         struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif);
 308         struct ieee80211_txq *queue;
 309
 310         spin_lock(&local->handle_wake_tx_queue_lock);
 311
 312         /* Use ieee80211_next_txq() for airtime fairness accounting */
 313         ieee80211_txq_schedule_start(hw, txq->ac);
 314         while ((queue = ieee80211_next_txq(hw, txq->ac))) {
 315                 wake_tx_push_queue(local, sdata, queue);
 316                 ieee80211_return_txq(hw, queue, false);
 317         }
 318         ieee80211_txq_schedule_end(hw, txq->ac);
 319         spin_unlock(&local->handle_wake_tx_queue_lock);
 320 }
 321 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue);
 322
 323 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
 324 {
 325         struct ieee80211_local *local = sdata->local;
 326         struct ieee80211_vif *vif = &sdata->vif;
 327         struct fq *fq = &local->fq;
 328         struct ps_data *ps = NULL;
 329         struct txq_info *txqi;
 330         struct sta_info *sta;
 331         int i;
 332
 333         local_bh_disable();
 334         spin_lock(&fq->lock);
 335
 336         if (!test_bit(SDATA_STATE_RUNNING, &sdata->state))
 337                 goto out;
 338
 339         if (sdata->vif.type == NL80211_IFTYPE_AP)
 340                 ps = &sdata->bss->ps;
 341
 342         list_for_each_entry_rcu(sta, &local->sta_list, list) {
 343                 if (sdata != sta->sdata)
 344                         continue;
 345
 346                 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
 347                         struct ieee80211_txq *txq = sta->sta.txq[i];
 348
 349                         if (!txq)
 350                                 continue;
 351
 352                         txqi = to_txq_info(txq);
 353
 354                         if (ac != txq->ac)
 355                                 continue;
 356
 357                         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY,
 358                                                 &txqi->flags))
 359                                 continue;
 360
 361                         spin_unlock(&fq->lock);
 362                         drv_wake_tx_queue(local, txqi);
 363                         spin_lock(&fq->lock);
 364                 }
 365         }
 366
 367         if (!vif->txq)
 368                 goto out;
 369
 370         txqi = to_txq_info(vif->txq);
 371
 372         if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) ||
 373             (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
 374                 goto out;
 375
 376         spin_unlock(&fq->lock);
 377
 378         drv_wake_tx_queue(local, txqi);
 379         local_bh_enable();
 380         return;
 381 out:
 382         spin_unlock(&fq->lock);
 383         local_bh_enable();
 384 }
 385
 386 static void
 387 __releases(&local->queue_stop_reason_lock)
 388 __acquires(&local->queue_stop_reason_lock)
 389 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
 390 {
 391         struct ieee80211_sub_if_data *sdata;
 392         int n_acs = IEEE80211_NUM_ACS;
 393         int i;
 394
 395         rcu_read_lock();
 396
 397         if (local->hw.queues < IEEE80211_NUM_ACS)
 398                 n_acs = 1;
 399
 400         for (i = 0; i < local->hw.queues; i++) {
 401                 if (local->queue_stop_reasons[i])
 402                         continue;
 403
 404                 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
 405                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 406                         int ac;
 407
 408                         for (ac = 0; ac < n_acs; ac++) {
 409                                 int ac_queue = sdata->vif.hw_queue[ac];
 410
 411                                 if (ac_queue == i ||
 412                                     sdata->vif.cab_queue == i)
 413                                         __ieee80211_wake_txqs(sdata, ac);
 414                         }
 415                 }
 416                 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
 417         }
 418
 419         rcu_read_unlock();
 420 }
 421
 422 void ieee80211_wake_txqs(struct tasklet_struct *t)
 423 {
 424         struct ieee80211_local *local = from_tasklet(local, t,
 425                                                      wake_txqs_tasklet);
 426         unsigned long flags;
 427
 428         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 429         _ieee80211_wake_txqs(local, &flags);
 430         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 431 }
 432
 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
 434                                    enum queue_stop_reason reason,
 435                                    bool refcounted,
 436                                    unsigned long *flags)
 437 {
 438         struct ieee80211_local *local = hw_to_local(hw);
 439
 440         if (WARN_ON(queue >= hw->queues))
 441                 return;
 442
 443         if (!test_bit(reason, &local->queue_stop_reasons[queue]))
 444                 return;
 445
 446         if (!refcounted) {
 447                 local->q_stop_reasons[queue][reason] = 0;
 448         } else {
 449                 local->q_stop_reasons[queue][reason]--;
 450                 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
 451                         local->q_stop_reasons[queue][reason] = 0;
 452         }
 453
 454         if (local->q_stop_reasons[queue][reason] == 0)
 455                 __clear_bit(reason, &local->queue_stop_reasons[queue]);
 456
 457         trace_wake_queue(local, queue, reason,
 458                          local->q_stop_reasons[queue][reason]);
 459
 460         if (local->queue_stop_reasons[queue] != 0)
 461                 /* someone still has this queue stopped */
 462                 return;
 463
 464         if (!skb_queue_empty(&local->pending[queue]))
 465                 tasklet_schedule(&local->tx_pending_tasklet);
 466
 467         /*
 468          * Calling _ieee80211_wake_txqs here can be a problem because it may
 469          * release queue_stop_reason_lock which has been taken by
 470          * __ieee80211_wake_queue's caller. It is certainly not very nice to
 471          * release someone's lock, but it is fine because all the callers of
 472          * __ieee80211_wake_queue call it right before releasing the lock.
 473          */
 474         if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
 475                 tasklet_schedule(&local->wake_txqs_tasklet);
 476         else
 477                 _ieee80211_wake_txqs(local, flags);
 478 }
 479
 480 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 481                                     enum queue_stop_reason reason,
 482                                     bool refcounted)
 483 {
 484         struct ieee80211_local *local = hw_to_local(hw);
 485         unsigned long flags;
 486
 487         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 488         __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
 489         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 490 }
 491
 492 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
 493 {
 494         ieee80211_wake_queue_by_reason(hw, queue,
 495                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 496                                        false);
 497 }
 498 EXPORT_SYMBOL(ieee80211_wake_queue);
 499
 500 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
 501                                    enum queue_stop_reason reason,
 502                                    bool refcounted)
 503 {
 504         struct ieee80211_local *local = hw_to_local(hw);
 505
 506         if (WARN_ON(queue >= hw->queues))
 507                 return;
 508
 509         if (!refcounted)
 510                 local->q_stop_reasons[queue][reason] = 1;
 511         else
 512                 local->q_stop_reasons[queue][reason]++;
 513
 514         trace_stop_queue(local, queue, reason,
 515                          local->q_stop_reasons[queue][reason]);
 516
 517         set_bit(reason, &local->queue_stop_reasons[queue]);
 518 }
 519
 520 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 521                                     enum queue_stop_reason reason,
 522                                     bool refcounted)
 523 {
 524         struct ieee80211_local *local = hw_to_local(hw);
 525         unsigned long flags;
 526
 527         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 528         __ieee80211_stop_queue(hw, queue, reason, refcounted);
 529         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 530 }
 531
 532 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
 533 {
 534         ieee80211_stop_queue_by_reason(hw, queue,
 535                                        IEEE80211_QUEUE_STOP_REASON_DRIVER,
 536                                        false);
 537 }
 538 EXPORT_SYMBOL(ieee80211_stop_queue);
 539
 540 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 541                                struct sk_buff *skb)
 542 {
 543         struct ieee80211_hw *hw = &local->hw;
 544         unsigned long flags;
 545         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 546         int queue = info->hw_queue;
 547
 548         if (WARN_ON(!info->control.vif)) {
 549                 ieee80211_free_txskb(&local->hw, skb);
 550                 return;
 551         }
 552
 553         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 554         __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 555                                false);
 556         __skb_queue_tail(&local->pending[queue], skb);
 557         __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 558                                false, &flags);
 559         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 560 }
 561
 562 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
 563                                 struct sk_buff_head *skbs)
 564 {
 565         struct ieee80211_hw *hw = &local->hw;
 566         struct sk_buff *skb;
 567         unsigned long flags;
 568         int queue, i;
 569
 570         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 571         while ((skb = skb_dequeue(skbs))) {
 572                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 573
 574                 if (WARN_ON(!info->control.vif)) {
 575                         ieee80211_free_txskb(&local->hw, skb);
 576                         continue;
 577                 }
 578
 579                 queue = info->hw_queue;
 580
 581                 __ieee80211_stop_queue(hw, queue,
 582                                 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 583                                 false);
 584
 585                 __skb_queue_tail(&local->pending[queue], skb);
 586         }
 587
 588         for (i = 0; i < hw->queues; i++)
 589                 __ieee80211_wake_queue(hw, i,
 590                         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
 591                         false, &flags);
 592         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 593 }
 594
 595 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 596                                      unsigned long queues,
 597                                      enum queue_stop_reason reason,
 598                                      bool refcounted)
 599 {
 600         struct ieee80211_local *local = hw_to_local(hw);
 601         unsigned long flags;
 602         int i;
 603
 604         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 605
 606         for_each_set_bit(i, &queues, hw->queues)
 607                 __ieee80211_stop_queue(hw, i, reason, refcounted);
 608
 609         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 610 }
 611
 612 void ieee80211_stop_queues(struct ieee80211_hw *hw)
 613 {
 614         ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 615                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 616                                         false);
 617 }
 618 EXPORT_SYMBOL(ieee80211_stop_queues);
 619
 620 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
 621 {
 622         struct ieee80211_local *local = hw_to_local(hw);
 623         unsigned long flags;
 624         int ret;
 625
 626         if (WARN_ON(queue >= hw->queues))
 627                 return true;
 628
 629         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 630         ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
 631                        &local->queue_stop_reasons[queue]);
 632         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 633         return ret;
 634 }
 635 EXPORT_SYMBOL(ieee80211_queue_stopped);
 636
 637 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 638                                      unsigned long queues,
 639                                      enum queue_stop_reason reason,
 640                                      bool refcounted)
 641 {
 642         struct ieee80211_local *local = hw_to_local(hw);
 643         unsigned long flags;
 644         int i;
 645
 646         spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
 647
 648         for_each_set_bit(i, &queues, hw->queues)
 649                 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
 650
 651         spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 652 }
 653
 654 void ieee80211_wake_queues(struct ieee80211_hw *hw)
 655 {
 656         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
 657                                         IEEE80211_QUEUE_STOP_REASON_DRIVER,
 658                                         false);
 659 }
 660 EXPORT_SYMBOL(ieee80211_wake_queues);
 661
 662 unsigned int
 663 ieee80211_get_vif_queues(struct ieee80211_local *local,
 664                          struct ieee80211_sub_if_data *sdata)
 665 {
 666         unsigned int queues;
 667
 668         if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
 669                 int ac;
 670
 671                 queues = 0;
 672
 673                 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
 674                         if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
 675                                 queues |= BIT(sdata->vif.hw_queue[ac]);
 676                 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 677                         queues |= BIT(sdata->vif.cab_queue);
 678         } else {
 679                 /* all queues */
 680                 queues = BIT(local->hw.queues) - 1;
 681         }
 682
 683         return queues;
 684 }
 685
 686 void __ieee80211_flush_queues(struct ieee80211_local *local,
 687                               struct ieee80211_sub_if_data *sdata,
 688                               unsigned int queues, bool drop)
 689 {
 690         if (!local->ops->flush && !drop)
 691                 return;
 692
 693         /*
 694          * If no queue was set, or if the HW doesn't support
 695          * IEEE80211_HW_QUEUE_CONTROL - flush all queues
 696          */
 697         if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
 698                 queues = ieee80211_get_vif_queues(local, sdata);
 699
 700         ieee80211_stop_queues_by_reason(&local->hw, queues,
 701                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 702                                         false);
 703
 704         if (drop) {
 705                 struct sta_info *sta;
 706
 707                 /* Purge the queues, so the frames on them won't be
 708                  * sent during __ieee80211_wake_queue()
 709                  */
 710                 list_for_each_entry(sta, &local->sta_list, list) {
 711                         if (sdata != sta->sdata)
 712                                 continue;
 713                         ieee80211_purge_sta_txqs(sta);
 714                 }
 715         }
 716
 717         if (local->ops->flush)
 718                 drv_flush(local, sdata, queues, drop);
 719
 720         ieee80211_wake_queues_by_reason(&local->hw, queues,
 721                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
 722                                         false);
 723 }
 724
 725 void ieee80211_flush_queues(struct ieee80211_local *local,
 726                             struct ieee80211_sub_if_data *sdata, bool drop)
 727 {
 728         __ieee80211_flush_queues(local, sdata, 0, drop);
 729 }
 730
 731 static void __iterate_interfaces(struct ieee80211_local *local,
 732                                  u32 iter_flags,
 733                                  void (*iterator)(void *data, u8 *mac,
 734                                                   struct ieee80211_vif *vif),
 735                                  void *data)
 736 {
 737         struct ieee80211_sub_if_data *sdata;
 738         bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
 739
 740         list_for_each_entry_rcu(sdata, &local->interfaces, list,
 741                                 lockdep_is_held(&local->iflist_mtx) ||
 742                                 lockdep_is_held(&local->hw.wiphy->mtx)) {
 743                 switch (sdata->vif.type) {
 744                 case NL80211_IFTYPE_MONITOR:
 745                         if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) &&
 746                             !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
 747                                 continue;
 748                         break;
 749                 case NL80211_IFTYPE_AP_VLAN:
 750                         continue;
 751                 default:
 752                         break;
 753                 }
 754                 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
 755                     active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 756                         continue;
 757                 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
 758                     !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 759                         continue;
 760                 if (ieee80211_sdata_running(sdata) || !active_only)
 761                         iterator(data, sdata->vif.addr,
 762                                  &sdata->vif);
 763         }
 764
 765         sdata = rcu_dereference_check(local->monitor_sdata,
 766                                       lockdep_is_held(&local->iflist_mtx) ||
 767                                       lockdep_is_held(&local->hw.wiphy->mtx));
 768         if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
 769             (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
 770              sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 771                 iterator(data, sdata->vif.addr, &sdata->vif);
 772 }
 773
 774 void ieee80211_iterate_interfaces(
 775         struct ieee80211_hw *hw, u32 iter_flags,
 776         void (*iterator)(void *data, u8 *mac,
 777                          struct ieee80211_vif *vif),
 778         void *data)
 779 {
 780         struct ieee80211_local *local = hw_to_local(hw);
 781
 782         mutex_lock(&local->iflist_mtx);
 783         __iterate_interfaces(local, iter_flags, iterator, data);
 784         mutex_unlock(&local->iflist_mtx);
 785 }
 786 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
 787
 788 void ieee80211_iterate_active_interfaces_atomic(
 789         struct ieee80211_hw *hw, u32 iter_flags,
 790         void (*iterator)(void *data, u8 *mac,
 791                          struct ieee80211_vif *vif),
 792         void *data)
 793 {
 794         struct ieee80211_local *local = hw_to_local(hw);
 795
 796         rcu_read_lock();
 797         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 798                              iterator, data);
 799         rcu_read_unlock();
 800 }
 801 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
 802
 803 void ieee80211_iterate_active_interfaces_mtx(
 804         struct ieee80211_hw *hw, u32 iter_flags,
 805         void (*iterator)(void *data, u8 *mac,
 806                          struct ieee80211_vif *vif),
 807         void *data)
 808 {
 809         struct ieee80211_local *local = hw_to_local(hw);
 810
 811         lockdep_assert_wiphy(hw->wiphy);
 812
 813         __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
 814                              iterator, data);
 815 }
 816 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
 817
 818 static void __iterate_stations(struct ieee80211_local *local,
 819                                void (*iterator)(void *data,
 820                                                 struct ieee80211_sta *sta),
 821                                void *data)
 822 {
 823         struct sta_info *sta;
 824
 825         list_for_each_entry_rcu(sta, &local->sta_list, list,
 826                                 lockdep_is_held(&local->hw.wiphy->mtx)) {
 827                 if (!sta->uploaded)
 828                         continue;
 829
 830                 iterator(data, &sta->sta);
 831         }
 832 }
 833
 834 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
 835                         void (*iterator)(void *data,
 836                                          struct ieee80211_sta *sta),
 837                         void *data)
 838 {
 839         struct ieee80211_local *local = hw_to_local(hw);
 840
 841         rcu_read_lock();
 842         __iterate_stations(local, iterator, data);
 843         rcu_read_unlock();
 844 }
 845 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
 846
 847 void ieee80211_iterate_stations_mtx(struct ieee80211_hw *hw,
 848                                     void (*iterator)(void *data,
 849                                                      struct ieee80211_sta *sta),
 850                                     void *data)
 851 {
 852         struct ieee80211_local *local = hw_to_local(hw);
 853
 854         lockdep_assert_wiphy(local->hw.wiphy);
 855
 856         __iterate_stations(local, iterator, data);
 857 }
 858 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_mtx);
 859
 860 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
 861 {
 862         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
 863
 864         if (!ieee80211_sdata_running(sdata) ||
 865             !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
 866                 return NULL;
 867         return &sdata->vif;
 868 }
 869 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
 870
 871 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
 872 {
 873         if (!vif)
 874                 return NULL;
 875
 876         return &vif_to_sdata(vif)->wdev;
 877 }
 878 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
 879
 880 /*
 881  * Nothing should have been stuffed into the workqueue during
 882  * the suspend->resume cycle. Since we can't check each caller
 883  * of this function if we are already quiescing / suspended,
 884  * check here and don't WARN since this can actually happen when
 885  * the rx path (for example) is racing against __ieee80211_suspend
 886  * and suspending / quiescing was set after the rx path checked
 887  * them.
 888  */
 889 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
 890 {
 891         if (local->quiescing || (local->suspended && !local->resuming)) {
 892                 pr_warn("queueing ieee80211 work while going to suspend\n");
 893                 return false;
 894         }
 895
 896         return true;
 897 }
 898
 899 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
 900 {
 901         struct ieee80211_local *local = hw_to_local(hw);
 902
 903         if (!ieee80211_can_queue_work(local))
 904                 return;
 905
 906         queue_work(local->workqueue, work);
 907 }
 908 EXPORT_SYMBOL(ieee80211_queue_work);
 909
 910 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
 911                                   struct delayed_work *dwork,
 912                                   unsigned long delay)
 913 {
 914         struct ieee80211_local *local = hw_to_local(hw);
 915
 916         if (!ieee80211_can_queue_work(local))
 917                 return;
 918
 919         queue_delayed_work(local->workqueue, dwork, delay);
 920 }
 921 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
 922
 923 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
 924                                            struct ieee80211_tx_queue_params
 925                                            *qparam, int ac)
 926 {
 927         struct ieee80211_chanctx_conf *chanctx_conf;
 928         const struct ieee80211_reg_rule *rrule;
 929         const struct ieee80211_wmm_ac *wmm_ac;
 930         u16 center_freq = 0;
 931
 932         if (sdata->vif.type != NL80211_IFTYPE_AP &&
 933             sdata->vif.type != NL80211_IFTYPE_STATION)
 934                 return;
 935
 936         rcu_read_lock();
 937         chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
 938         if (chanctx_conf)
 939                 center_freq = chanctx_conf->def.chan->center_freq;
 940
 941         if (!center_freq) {
 942                 rcu_read_unlock();
 943                 return;
 944         }
 945
 946         rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
 947
 948         if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
 949                 rcu_read_unlock();
 950                 return;
 951         }
 952
 953         if (sdata->vif.type == NL80211_IFTYPE_AP)
 954                 wmm_ac = &rrule->wmm_rule.ap[ac];
 955         else
 956                 wmm_ac = &rrule->wmm_rule.client[ac];
 957         qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
 958         qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
 959         qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
 960         qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
 961         rcu_read_unlock();
 962 }
 963
 964 void ieee80211_set_wmm_default(struct ieee80211_link_data *link,
 965                                bool bss_notify, bool enable_qos)
 966 {
 967         struct ieee80211_sub_if_data *sdata = link->sdata;
 968         struct ieee80211_local *local = sdata->local;
 969         struct ieee80211_tx_queue_params qparam;
 970         struct ieee80211_chanctx_conf *chanctx_conf;
 971         int ac;
 972         bool use_11b;
 973         bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
 974         int aCWmin, aCWmax;
 975
 976         if (!local->ops->conf_tx)
 977                 return;
 978
 979         if (local->hw.queues < IEEE80211_NUM_ACS)
 980                 return;
 981
 982         memset(&qparam, 0, sizeof(qparam));
 983
 984         rcu_read_lock();
 985         chanctx_conf = rcu_dereference(link->conf->chanctx_conf);
 986         use_11b = (chanctx_conf &&
 987                    chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
 988                  !link->operating_11g_mode;
 989         rcu_read_unlock();
 990
 991         is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
 992
 993         /* Set defaults according to 802.11-2007 Table 7-37 */
 994         aCWmax = 1023;
 995         if (use_11b)
 996                 aCWmin = 31;
 997         else
 998                 aCWmin = 15;
 999
1000         /* Configure old 802.11b/g medium access rules. */
1001         qparam.cw_max = aCWmax;
1002         qparam.cw_min = aCWmin;
1003         qparam.txop = 0;
1004         qparam.aifs = 2;
1005
1006         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1007                 /* Update if QoS is enabled. */
1008                 if (enable_qos) {
1009                         switch (ac) {
1010                         case IEEE80211_AC_BK:
1011                                 qparam.cw_max = aCWmax;
1012                                 qparam.cw_min = aCWmin;
1013                                 qparam.txop = 0;
1014                                 if (is_ocb)
1015                                         qparam.aifs = 9;
1016                                 else
1017                                         qparam.aifs = 7;
1018                                 break;
1019                         /* never happens but let's not leave undefined */
1020                         default:
1021                         case IEEE80211_AC_BE:
1022                                 qparam.cw_max = aCWmax;
1023                                 qparam.cw_min = aCWmin;
1024                                 qparam.txop = 0;
1025                                 if (is_ocb)
1026                                         qparam.aifs = 6;
1027                                 else
1028                                         qparam.aifs = 3;
1029                                 break;
1030                         case IEEE80211_AC_VI:
1031                                 qparam.cw_max = aCWmin;
1032                                 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1033                                 if (is_ocb)
1034                                         qparam.txop = 0;
1035                                 else if (use_11b)
1036                                         qparam.txop = 6016/32;
1037                                 else
1038                                         qparam.txop = 3008/32;
1039
1040                                 if (is_ocb)
1041                                         qparam.aifs = 3;
1042                                 else
1043                                         qparam.aifs = 2;
1044                                 break;
1045                         case IEEE80211_AC_VO:
1046                                 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1047                                 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1048                                 if (is_ocb)
1049                                         qparam.txop = 0;
1050                                 else if (use_11b)
1051                                         qparam.txop = 3264/32;
1052                                 else
1053                                         qparam.txop = 1504/32;
1054                                 qparam.aifs = 2;
1055                                 break;
1056                         }
1057                 }
1058                 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1059
1060                 qparam.uapsd = false;
1061
1062                 link->tx_conf[ac] = qparam;
1063                 drv_conf_tx(local, link, ac, &qparam);
1064         }
1065
1066         if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1067             sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1068             sdata->vif.type != NL80211_IFTYPE_NAN) {
1069                 link->conf->qos = enable_qos;
1070                 if (bss_notify)
1071                         ieee80211_link_info_change_notify(sdata, link,
1072                                                           BSS_CHANGED_QOS);
1073         }
1074 }
1075
1076 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1077                          u16 transaction, u16 auth_alg, u16 status,
1078                          const u8 *extra, size_t extra_len, const u8 *da,
1079                          const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1080                          u32 tx_flags)
1081 {
1082         struct ieee80211_local *local = sdata->local;
1083         struct sk_buff *skb;
1084         struct ieee80211_mgmt *mgmt;
1085         bool multi_link = ieee80211_vif_is_mld(&sdata->vif);
1086         struct {
1087                 u8 id;
1088                 u8 len;
1089                 u8 ext_id;
1090                 struct ieee80211_multi_link_elem ml;
1091                 struct ieee80211_mle_basic_common_info basic;
1092         } __packed mle = {
1093                 .id = WLAN_EID_EXTENSION,
1094                 .len = sizeof(mle) - 2,
1095                 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK,
1096                 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC),
1097                 .basic.len = sizeof(mle.basic),
1098         };
1099         int err;
1100
1101         memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN);
1102
1103         /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1104         skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1105                             24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN +
1106                             multi_link * sizeof(mle));
1107         if (!skb)
1108                 return;
1109
1110         skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1111
1112         mgmt = skb_put_zero(skb, 24 + 6);
1113         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1114                                           IEEE80211_STYPE_AUTH);
1115         memcpy(mgmt->da, da, ETH_ALEN);
1116         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1117         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1118         mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1119         mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1120         mgmt->u.auth.status_code = cpu_to_le16(status);
1121         if (extra)
1122                 skb_put_data(skb, extra, extra_len);
1123         if (multi_link)
1124                 skb_put_data(skb, &mle, sizeof(mle));
1125
1126         if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1127                 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1128                 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1129                 if (WARN_ON(err)) {
1130                         kfree_skb(skb);
1131                         return;
1132                 }
1133         }
1134
1135         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1136                                         tx_flags;
1137         ieee80211_tx_skb(sdata, skb);
1138 }
1139
1140 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1141                                     const u8 *da, const u8 *bssid,
1142                                     u16 stype, u16 reason,
1143                                     bool send_frame, u8 *frame_buf)
1144 {
1145         struct ieee80211_local *local = sdata->local;
1146         struct sk_buff *skb;
1147         struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1148
1149         /* build frame */
1150         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1151         mgmt->duration = 0; /* initialize only */
1152         mgmt->seq_ctrl = 0; /* initialize only */
1153         memcpy(mgmt->da, da, ETH_ALEN);
1154         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1155         memcpy(mgmt->bssid, bssid, ETH_ALEN);
1156         /* u.deauth.reason_code == u.disassoc.reason_code */
1157         mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1158
1159         if (send_frame) {
1160                 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1161                                     IEEE80211_DEAUTH_FRAME_LEN);
1162                 if (!skb)
1163                         return;
1164
1165                 skb_reserve(skb, local->hw.extra_tx_headroom);
1166
1167                 /* copy in frame */
1168                 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1169
1170                 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1171                     !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1172                         IEEE80211_SKB_CB(skb)->flags |=
1173                                 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1174
1175                 ieee80211_tx_skb(sdata, skb);
1176         }
1177 }
1178
1179 static int ieee80211_put_s1g_cap(struct sk_buff *skb,
1180                                  struct ieee80211_sta_s1g_cap *s1g_cap)
1181 {
1182         if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap))
1183                 return -ENOBUFS;
1184
1185         skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES);
1186         skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap));
1187
1188         skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap));
1189         skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs));
1190
1191         return 0;
1192 }
1193
1194 static int ieee80211_put_preq_ies_band(struct sk_buff *skb,
1195                                        struct ieee80211_sub_if_data *sdata,
1196                                        const u8 *ie, size_t ie_len,
1197                                        size_t *offset,
1198                                        enum nl80211_band band,
1199                                        u32 rate_mask,
1200                                        struct cfg80211_chan_def *chandef,
1201                                        u32 flags)
1202 {
1203         struct ieee80211_local *local = sdata->local;
1204         struct ieee80211_supported_band *sband;
1205         int i, err;
1206         size_t noffset;
1207         bool have_80mhz = false;
1208
1209         *offset = 0;
1210
1211         sband = local->hw.wiphy->bands[band];
1212         if (WARN_ON_ONCE(!sband))
1213                 return 0;
1214
1215         /* For direct scan add S1G IE and consider its override bits */
1216         if (band == NL80211_BAND_S1GHZ)
1217                 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap);
1218
1219         err = ieee80211_put_srates_elem(skb, sband, 0,
1220                                         ~rate_mask, WLAN_EID_SUPP_RATES);
1221         if (err)
1222                 return err;
1223
1224         /* insert "request information" if in custom IEs */
1225         if (ie && ie_len) {
1226                 static const u8 before_extrates[] = {
1227                         WLAN_EID_SSID,
1228                         WLAN_EID_SUPP_RATES,
1229                         WLAN_EID_REQUEST,
1230                 };
1231                 noffset = ieee80211_ie_split(ie, ie_len,
1232                                              before_extrates,
1233                                              ARRAY_SIZE(before_extrates),
1234                                              *offset);
1235                 if (skb_tailroom(skb) < noffset - *offset)
1236                         return -ENOBUFS;
1237                 skb_put_data(skb, ie + *offset, noffset - *offset);
1238                 *offset = noffset;
1239         }
1240
1241         err = ieee80211_put_srates_elem(skb, sband, 0,
1242                                         ~rate_mask, WLAN_EID_EXT_SUPP_RATES);
1243         if (err)
1244                 return err;
1245
1246         if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1247                 if (skb_tailroom(skb) < 3)
1248                         return -ENOBUFS;
1249                 skb_put_u8(skb, WLAN_EID_DS_PARAMS);
1250                 skb_put_u8(skb, 1);
1251                 skb_put_u8(skb,
1252                            ieee80211_frequency_to_channel(chandef->chan->center_freq));
1253         }
1254
1255         if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1256                 return 0;
1257
1258         /* insert custom IEs that go before HT */
1259         if (ie && ie_len) {
1260                 static const u8 before_ht[] = {
1261                         /*
1262                          * no need to list the ones split off already
1263                          * (or generated here)
1264                          */
1265                         WLAN_EID_DS_PARAMS,
1266                         WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1267                 };
1268                 noffset = ieee80211_ie_split(ie, ie_len,
1269                                              before_ht, ARRAY_SIZE(before_ht),
1270                                              *offset);
1271                 if (skb_tailroom(skb) < noffset - *offset)
1272                         return -ENOBUFS;
1273                 skb_put_data(skb, ie + *offset, noffset - *offset);
1274                 *offset = noffset;
1275         }
1276
1277         if (sband->ht_cap.ht_supported) {
1278                 u8 *pos;
1279
1280                 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap))
1281                         return -ENOBUFS;
1282
1283                 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap));
1284                 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1285                                           sband->ht_cap.cap);
1286         }
1287
1288         /* insert custom IEs that go before VHT */
1289         if (ie && ie_len) {
1290                 static const u8 before_vht[] = {
1291                         /*
1292                          * no need to list the ones split off already
1293                          * (or generated here)
1294                          */
1295                         WLAN_EID_BSS_COEX_2040,
1296                         WLAN_EID_EXT_CAPABILITY,
1297                         WLAN_EID_SSID_LIST,
1298                         WLAN_EID_CHANNEL_USAGE,
1299                         WLAN_EID_INTERWORKING,
1300                         WLAN_EID_MESH_ID,
1301                         /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1302                 };
1303                 noffset = ieee80211_ie_split(ie, ie_len,
1304                                              before_vht, ARRAY_SIZE(before_vht),
1305                                              *offset);
1306                 if (skb_tailroom(skb) < noffset - *offset)
1307                         return -ENOBUFS;
1308                 skb_put_data(skb, ie + *offset, noffset - *offset);
1309                 *offset = noffset;
1310         }
1311
1312         /* Check if any channel in this sband supports at least 80 MHz */
1313         for (i = 0; i < sband->n_channels; i++) {
1314                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1315                                                 IEEE80211_CHAN_NO_80MHZ))
1316                         continue;
1317
1318                 have_80mhz = true;
1319                 break;
1320         }
1321
1322         if (sband->vht_cap.vht_supported && have_80mhz) {
1323                 u8 *pos;
1324
1325                 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap))
1326                         return -ENOBUFS;
1327
1328                 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap));
1329                 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1330                                            sband->vht_cap.cap);
1331         }
1332
1333         /* insert custom IEs that go before HE */
1334         if (ie && ie_len) {
1335                 static const u8 before_he[] = {
1336                         /*
1337                          * no need to list the ones split off before VHT
1338                          * or generated here
1339                          */
1340                         WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1341                         WLAN_EID_AP_CSN,
1342                         /* TODO: add 11ah/11aj/11ak elements */
1343                 };
1344                 noffset = ieee80211_ie_split(ie, ie_len,
1345                                              before_he, ARRAY_SIZE(before_he),
1346                                              *offset);
1347                 if (skb_tailroom(skb) < noffset - *offset)
1348                         return -ENOBUFS;
1349                 skb_put_data(skb, ie + *offset, noffset - *offset);
1350                 *offset = noffset;
1351         }
1352
1353         if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1354                                          IEEE80211_CHAN_NO_HE)) {
1355                 err = ieee80211_put_he_cap(skb, sdata, sband, NULL);
1356                 if (err)
1357                         return err;
1358         }
1359
1360         if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
1361                                          IEEE80211_CHAN_NO_HE |
1362                                          IEEE80211_CHAN_NO_EHT)) {
1363                 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL);
1364                 if (err)
1365                         return err;
1366         }
1367
1368         err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF);
1369         if (err)
1370                 return err;
1371
1372         /*
1373          * If adding more here, adjust code in main.c
1374          * that calculates local->scan_ies_len.
1375          */
1376
1377         return 0;
1378 }
1379
1380 static int ieee80211_put_preq_ies(struct sk_buff *skb,
1381                                   struct ieee80211_sub_if_data *sdata,
1382                                   struct ieee80211_scan_ies *ie_desc,
1383                                   const u8 *ie, size_t ie_len,
1384                                   u8 bands_used, u32 *rate_masks,
1385                                   struct cfg80211_chan_def *chandef,
1386                                   u32 flags)
1387 {
1388         size_t custom_ie_offset = 0;
1389         int i, err;
1390
1391         memset(ie_desc, 0, sizeof(*ie_desc));
1392
1393         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1394                 if (bands_used & BIT(i)) {
1395                         ie_desc->ies[i] = skb_tail_pointer(skb);
1396                         err = ieee80211_put_preq_ies_band(skb, sdata,
1397                                                           ie, ie_len,
1398                                                           &custom_ie_offset,
1399                                                           i, rate_masks[i],
1400                                                           chandef, flags);
1401                         if (err)
1402                                 return err;
1403                         ie_desc->len[i] = skb_tail_pointer(skb) -
1404                                           ie_desc->ies[i];
1405                 }
1406         }
1407
1408         /* add any remaining custom IEs */
1409         if (ie && ie_len) {
1410                 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset,
1411                               "not enough space for preq custom IEs\n"))
1412                         return -ENOBUFS;
1413                 ie_desc->common_ies = skb_tail_pointer(skb);
1414                 skb_put_data(skb, ie + custom_ie_offset,
1415                              ie_len - custom_ie_offset);
1416                 ie_desc->common_ie_len = skb_tail_pointer(skb) -
1417                                          ie_desc->common_ies;
1418         }
1419
1420         return 0;
1421 };
1422
1423 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1424                              size_t buffer_len,
1425                              struct ieee80211_scan_ies *ie_desc,
1426                              const u8 *ie, size_t ie_len,
1427                              u8 bands_used, u32 *rate_masks,
1428                              struct cfg80211_chan_def *chandef,
1429                              u32 flags)
1430 {
1431         struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL);
1432         uintptr_t offs;
1433         int ret, i;
1434         u8 *start;
1435
1436         if (!skb)
1437                 return -ENOMEM;
1438
1439         start = skb_tail_pointer(skb);
1440         memset(start, 0, skb_tailroom(skb));
1441         ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len,
1442                                      bands_used, rate_masks, chandef,
1443                                      flags);
1444         if (ret < 0) {
1445                 goto out;
1446         }
1447
1448         if (skb->len > buffer_len) {
1449                 ret = -ENOBUFS;
1450                 goto out;
1451         }
1452
1453         memcpy(buffer, start, skb->len);
1454
1455         /* adjust ie_desc for copy */
1456         for (i = 0; i < NUM_NL80211_BANDS; i++) {
1457                 offs = ie_desc->ies[i] - start;
1458                 ie_desc->ies[i] = buffer + offs;
1459         }
1460         offs = ie_desc->common_ies - start;
1461         ie_desc->common_ies = buffer + offs;
1462
1463         ret = skb->len;
1464 out:
1465         consume_skb(skb);
1466         return ret;
1467 }
1468
1469 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1470                                           const u8 *src, const u8 *dst,
1471                                           u32 ratemask,
1472                                           struct ieee80211_channel *chan,
1473                                           const u8 *ssid, size_t ssid_len,
1474                                           const u8 *ie, size_t ie_len,
1475                                           u32 flags)
1476 {
1477         struct ieee80211_local *local = sdata->local;
1478         struct cfg80211_chan_def chandef;
1479         struct sk_buff *skb;
1480         struct ieee80211_mgmt *mgmt;
1481         u32 rate_masks[NUM_NL80211_BANDS] = {};
1482         struct ieee80211_scan_ies dummy_ie_desc;
1483
1484         /*
1485          * Do not send DS Channel parameter for directed probe requests
1486          * in order to maximize the chance that we get a response.  Some
1487          * badly-behaved APs don't respond when this parameter is included.
1488          */
1489         chandef.width = sdata->vif.bss_conf.chanreq.oper.width;
1490         if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1491                 chandef.chan = NULL;
1492         else
1493                 chandef.chan = chan;
1494
1495         skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1496                                      local->scan_ies_len + ie_len);
1497         if (!skb)
1498                 return NULL;
1499
1500         rate_masks[chan->band] = ratemask;
1501         ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc,
1502                                ie, ie_len, BIT(chan->band),
1503                                rate_masks, &chandef, flags);
1504
1505         if (dst) {
1506                 mgmt = (struct ieee80211_mgmt *) skb->data;
1507                 memcpy(mgmt->da, dst, ETH_ALEN);
1508                 memcpy(mgmt->bssid, dst, ETH_ALEN);
1509         }
1510
1511         IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1512
1513         return skb;
1514 }
1515
1516 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1517                             struct ieee802_11_elems *elems,
1518                             enum nl80211_band band, u32 *basic_rates)
1519 {
1520         struct ieee80211_supported_band *sband;
1521         size_t num_rates;
1522         u32 supp_rates;
1523         int i, j;
1524
1525         sband = sdata->local->hw.wiphy->bands[band];
1526         if (WARN_ON(!sband))
1527                 return 1;
1528
1529         num_rates = sband->n_bitrates;
1530         supp_rates = 0;
1531         for (i = 0; i < elems->supp_rates_len +
1532                      elems->ext_supp_rates_len; i++) {
1533                 u8 rate = 0;
1534                 int own_rate;
1535                 bool is_basic;
1536                 if (i < elems->supp_rates_len)
1537                         rate = elems->supp_rates[i];
1538                 else if (elems->ext_supp_rates)
1539                         rate = elems->ext_supp_rates
1540                                 [i - elems->supp_rates_len];
1541                 own_rate = 5 * (rate & 0x7f);
1542                 is_basic = !!(rate & 0x80);
1543
1544                 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1545                         continue;
1546
1547                 for (j = 0; j < num_rates; j++) {
1548                         int brate = sband->bitrates[j].bitrate;
1549
1550                         if (brate == own_rate) {
1551                                 supp_rates |= BIT(j);
1552                                 if (basic_rates && is_basic)
1553                                         *basic_rates |= BIT(j);
1554                         }
1555                 }
1556         }
1557         return supp_rates;
1558 }
1559
1560 void ieee80211_stop_device(struct ieee80211_local *local, bool suspend)
1561 {
1562         local_bh_disable();
1563         ieee80211_handle_queued_frames(local);
1564         local_bh_enable();
1565
1566         ieee80211_led_radio(local, false);
1567         ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1568
1569         wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter);
1570
1571         flush_workqueue(local->workqueue);
1572         wiphy_work_flush(local->hw.wiphy, NULL);
1573         drv_stop(local, suspend);
1574 }
1575
1576 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1577                                            bool aborted)
1578 {
1579         /* It's possible that we don't handle the scan completion in
1580          * time during suspend, so if it's still marked as completed
1581          * here, queue the work and flush it to clean things up.
1582          * Instead of calling the worker function directly here, we
1583          * really queue it to avoid potential races with other flows
1584          * scheduling the same work.
1585          */
1586         if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1587                 /* If coming from reconfiguration failure, abort the scan so
1588                  * we don't attempt to continue a partial HW scan - which is
1589                  * possible otherwise if (e.g.) the 2.4 GHz portion was the
1590                  * completed scan, and a 5 GHz portion is still pending.
1591                  */
1592                 if (aborted)
1593                         set_bit(SCAN_ABORTED, &local->scanning);
1594                 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0);
1595                 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
1596         }
1597 }
1598
1599 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1600 {
1601         struct ieee80211_sub_if_data *sdata;
1602         struct ieee80211_chanctx *ctx;
1603
1604         lockdep_assert_wiphy(local->hw.wiphy);
1605
1606         /*
1607          * We get here if during resume the device can't be restarted properly.
1608          * We might also get here if this happens during HW reset, which is a
1609          * slightly different situation and we need to drop all connections in
1610          * the latter case.
1611          *
1612          * Ask cfg80211 to turn off all interfaces, this will result in more
1613          * warnings but at least we'll then get into a clean stopped state.
1614          */
1615
1616         local->resuming = false;
1617         local->suspended = false;
1618         local->in_reconfig = false;
1619         local->reconfig_failure = true;
1620
1621         ieee80211_flush_completed_scan(local, true);
1622
1623         /* scheduled scan clearly can't be running any more, but tell
1624          * cfg80211 and clear local state
1625          */
1626         ieee80211_sched_scan_end(local);
1627
1628         list_for_each_entry(sdata, &local->interfaces, list)
1629                 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1630
1631         /* Mark channel contexts as not being in the driver any more to avoid
1632          * removing them from the driver during the shutdown process...
1633          */
1634         list_for_each_entry(ctx, &local->chanctx_list, list)
1635                 ctx->driver_present = false;
1636 }
1637
1638 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1639                                      struct ieee80211_sub_if_data *sdata,
1640                                      struct ieee80211_link_data *link)
1641 {
1642         struct ieee80211_chanctx_conf *conf;
1643         struct ieee80211_chanctx *ctx;
1644
1645         lockdep_assert_wiphy(local->hw.wiphy);
1646
1647         conf = rcu_dereference_protected(link->conf->chanctx_conf,
1648                                          lockdep_is_held(&local->hw.wiphy->mtx));
1649         if (conf) {
1650                 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1651                 drv_assign_vif_chanctx(local, sdata, link->conf, ctx);
1652         }
1653 }
1654
1655 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1656 {
1657         struct ieee80211_local *local = sdata->local;
1658         struct sta_info *sta;
1659
1660         lockdep_assert_wiphy(local->hw.wiphy);
1661
1662         /* add STAs back */
1663         list_for_each_entry(sta, &local->sta_list, list) {
1664                 enum ieee80211_sta_state state;
1665
1666                 if (!sta->uploaded || sta->sdata != sdata)
1667                         continue;
1668
1669                 for (state = IEEE80211_STA_NOTEXIST;
1670                      state < sta->sta_state; state++)
1671                         WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1672                                               state + 1));
1673         }
1674 }
1675
1676 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1677 {
1678         struct cfg80211_nan_func *func, **funcs;
1679         int res, id, i = 0;
1680
1681         res = drv_start_nan(sdata->local, sdata,
1682                             &sdata->u.nan.conf);
1683         if (WARN_ON(res))
1684                 return res;
1685
1686         funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1687                         sizeof(*funcs),
1688                         GFP_KERNEL);
1689         if (!funcs)
1690                 return -ENOMEM;
1691
1692         /* Add all the functions:
1693          * This is a little bit ugly. We need to call a potentially sleeping
1694          * callback for each NAN function, so we can't hold the spinlock.
1695          */
1696         spin_lock_bh(&sdata->u.nan.func_lock);
1697
1698         idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1699                 funcs[i++] = func;
1700
1701         spin_unlock_bh(&sdata->u.nan.func_lock);
1702
1703         for (i = 0; funcs[i]; i++) {
1704                 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1705                 if (WARN_ON(res))
1706                         ieee80211_nan_func_terminated(&sdata->vif,
1707                                                       funcs[i]->instance_id,
1708                                                       NL80211_NAN_FUNC_TERM_REASON_ERROR,
1709                                                       GFP_KERNEL);
1710         }
1711
1712         kfree(funcs);
1713
1714         return 0;
1715 }
1716
1717 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local,
1718                                         struct ieee80211_sub_if_data *sdata,
1719                                         u64 changed)
1720 {
1721         int link_id;
1722
1723         for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
1724                 struct ieee80211_link_data *link;
1725
1726                 if (!(sdata->vif.active_links & BIT(link_id)))
1727                         continue;
1728
1729                 link = sdata_dereference(sdata->link[link_id], sdata);
1730                 if (!link)
1731                         continue;
1732
1733                 if (rcu_access_pointer(link->u.ap.beacon))
1734                         drv_start_ap(local, sdata, link->conf);
1735
1736                 if (!link->conf->enable_beacon)
1737                         continue;
1738
1739                 changed |= BSS_CHANGED_BEACON |
1740                            BSS_CHANGED_BEACON_ENABLED;
1741
1742                 ieee80211_link_info_change_notify(sdata, link, changed);
1743         }
1744 }
1745
1746 int ieee80211_reconfig(struct ieee80211_local *local)
1747 {
1748         struct ieee80211_hw *hw = &local->hw;
1749         struct ieee80211_sub_if_data *sdata;
1750         struct ieee80211_chanctx *ctx;
1751         struct sta_info *sta;
1752         int res, i;
1753         bool reconfig_due_to_wowlan = false;
1754         struct ieee80211_sub_if_data *sched_scan_sdata;
1755         struct cfg80211_sched_scan_request *sched_scan_req;
1756         bool sched_scan_stopped = false;
1757         bool suspended = local->suspended;
1758         bool in_reconfig = false;
1759
1760         lockdep_assert_wiphy(local->hw.wiphy);
1761
1762         /* nothing to do if HW shouldn't run */
1763         if (!local->open_count)
1764                 goto wake_up;
1765
1766 #ifdef CONFIG_PM
1767         if (suspended)
1768                 local->resuming = true;
1769
1770         if (local->wowlan) {
1771                 /*
1772                  * In the wowlan case, both mac80211 and the device
1773                  * are functional when the resume op is called, so
1774                  * clear local->suspended so the device could operate
1775                  * normally (e.g. pass rx frames).
1776                  */
1777                 local->suspended = false;
1778                 res = drv_resume(local);
1779                 local->wowlan = false;
1780                 if (res < 0) {
1781                         local->resuming = false;
1782                         return res;
1783                 }
1784                 if (res == 0)
1785                         goto wake_up;
1786                 WARN_ON(res > 1);
1787                 /*
1788                  * res is 1, which means the driver requested
1789                  * to go through a regular reset on wakeup.
1790                  * restore local->suspended in this case.
1791                  */
1792                 reconfig_due_to_wowlan = true;
1793                 local->suspended = true;
1794         }
1795 #endif
1796
1797         /*
1798          * In case of hw_restart during suspend (without wowlan),
1799          * cancel restart work, as we are reconfiguring the device
1800          * anyway.
1801          * Note that restart_work is scheduled on a frozen workqueue,
1802          * so we can't deadlock in this case.
1803          */
1804         if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1805                 cancel_work_sync(&local->restart_work);
1806
1807         local->started = false;
1808
1809         /*
1810          * Upon resume hardware can sometimes be goofy due to
1811          * various platform / driver / bus issues, so restarting
1812          * the device may at times not work immediately. Propagate
1813          * the error.
1814          */
1815         res = drv_start(local);
1816         if (res) {
1817                 if (suspended)
1818                         WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1819                 else
1820                         WARN(1, "Hardware became unavailable during restart.\n");
1821                 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
1822                                                 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1823                                                 false);
1824                 ieee80211_handle_reconfig_failure(local);
1825                 return res;
1826         }
1827
1828         /* setup fragmentation threshold */
1829         drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1830
1831         /* setup RTS threshold */
1832         drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1833
1834         /* reset coverage class */
1835         drv_set_coverage_class(local, hw->wiphy->coverage_class);
1836
1837         ieee80211_led_radio(local, true);
1838         ieee80211_mod_tpt_led_trig(local,
1839                                    IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1840
1841         /* add interfaces */
1842         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1843         if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
1844                 /* in HW restart it exists already */
1845                 WARN_ON(local->resuming);
1846                 res = drv_add_interface(local, sdata);
1847                 if (WARN_ON(res)) {
1848                         RCU_INIT_POINTER(local->monitor_sdata, NULL);
1849                         synchronize_net();
1850                         kfree(sdata);
1851                 }
1852         }
1853
1854         list_for_each_entry(sdata, &local->interfaces, list) {
1855                 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
1856                     !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1857                         continue;
1858                 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1859                     ieee80211_sdata_running(sdata)) {
1860                         res = drv_add_interface(local, sdata);
1861                         if (WARN_ON(res))
1862                                 break;
1863                 }
1864         }
1865
1866         /* If adding any of the interfaces failed above, roll back and
1867          * report failure.
1868          */
1869         if (res) {
1870                 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1871                                                      list) {
1872                         if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
1873                             !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR))
1874                                 continue;
1875                         if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1876                             ieee80211_sdata_running(sdata))
1877                                 drv_remove_interface(local, sdata);
1878                 }
1879                 ieee80211_handle_reconfig_failure(local);
1880                 return res;
1881         }
1882
1883         /* add channel contexts */
1884         list_for_each_entry(ctx, &local->chanctx_list, list)
1885                 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1886                         WARN_ON(drv_add_chanctx(local, ctx));
1887
1888         sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata);
1889         if (sdata && ieee80211_sdata_running(sdata))
1890                 ieee80211_assign_chanctx(local, sdata, &sdata->deflink);
1891
1892         /* reconfigure hardware */
1893         ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL |
1894                                    IEEE80211_CONF_CHANGE_MONITOR |
1895                                    IEEE80211_CONF_CHANGE_PS |
1896                                    IEEE80211_CONF_CHANGE_RETRY_LIMITS |
1897                                    IEEE80211_CONF_CHANGE_IDLE);
1898
1899         ieee80211_configure_filter(local);
1900
1901         /* Finally also reconfigure all the BSS information */
1902         list_for_each_entry(sdata, &local->interfaces, list) {
1903                 /* common change flags for all interface types - link only */
1904                 u64 changed = BSS_CHANGED_ERP_CTS_PROT |
1905                               BSS_CHANGED_ERP_PREAMBLE |
1906                               BSS_CHANGED_ERP_SLOT |
1907                               BSS_CHANGED_HT |
1908                               BSS_CHANGED_BASIC_RATES |
1909                               BSS_CHANGED_BEACON_INT |
1910                               BSS_CHANGED_BSSID |
1911                               BSS_CHANGED_CQM |
1912                               BSS_CHANGED_QOS |
1913                               BSS_CHANGED_TXPOWER |
1914                               BSS_CHANGED_MCAST_RATE;
1915                 struct ieee80211_link_data *link = NULL;
1916                 unsigned int link_id;
1917                 u32 active_links = 0;
1918
1919                 if (!ieee80211_sdata_running(sdata))
1920                         continue;
1921
1922                 if (ieee80211_vif_is_mld(&sdata->vif)) {
1923                         struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = {
1924                                 [0] = &sdata->vif.bss_conf,
1925                         };
1926
1927                         if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1928                                 /* start with a single active link */
1929                                 active_links = sdata->vif.active_links;
1930                                 link_id = ffs(active_links) - 1;
1931                                 sdata->vif.active_links = BIT(link_id);
1932                         }
1933
1934                         drv_change_vif_links(local, sdata, 0,
1935                                              sdata->vif.active_links,
1936                                              old);
1937                 }
1938
1939                 sdata->restart_active_links = active_links;
1940
1941                 for (link_id = 0;
1942                      link_id < ARRAY_SIZE(sdata->vif.link_conf);
1943                      link_id++) {
1944                         if (!ieee80211_vif_link_active(&sdata->vif, link_id))
1945                                 continue;
1946
1947                         link = sdata_dereference(sdata->link[link_id], sdata);
1948                         if (!link)
1949                                 continue;
1950
1951                         ieee80211_assign_chanctx(local, sdata, link);
1952                 }
1953
1954                 switch (sdata->vif.type) {
1955                 case NL80211_IFTYPE_AP_VLAN:
1956                 case NL80211_IFTYPE_MONITOR:
1957                         break;
1958                 case NL80211_IFTYPE_ADHOC:
1959                         if (sdata->vif.cfg.ibss_joined)
1960                                 WARN_ON(drv_join_ibss(local, sdata));
1961                         fallthrough;
1962                 default:
1963                         ieee80211_reconfig_stations(sdata);
1964                         fallthrough;
1965                 case NL80211_IFTYPE_AP: /* AP stations are handled later */
1966                         for (i = 0; i < IEEE80211_NUM_ACS; i++)
1967                                 drv_conf_tx(local, &sdata->deflink, i,
1968                                             &sdata->deflink.tx_conf[i]);
1969                         break;
1970                 }
1971
1972                 if (sdata->vif.bss_conf.mu_mimo_owner)
1973                         changed |= BSS_CHANGED_MU_GROUPS;
1974
1975                 if (!ieee80211_vif_is_mld(&sdata->vif))
1976                         changed |= BSS_CHANGED_IDLE;
1977
1978                 switch (sdata->vif.type) {
1979                 case NL80211_IFTYPE_STATION:
1980                         if (!ieee80211_vif_is_mld(&sdata->vif)) {
1981                                 changed |= BSS_CHANGED_ASSOC |
1982                                            BSS_CHANGED_ARP_FILTER |
1983                                            BSS_CHANGED_PS;
1984
1985                                 /* Re-send beacon info report to the driver */
1986                                 if (sdata->deflink.u.mgd.have_beacon)
1987                                         changed |= BSS_CHANGED_BEACON_INFO;
1988
1989                                 if (sdata->vif.bss_conf.max_idle_period ||
1990                                     sdata->vif.bss_conf.protected_keep_alive)
1991                                         changed |= BSS_CHANGED_KEEP_ALIVE;
1992
1993                                 ieee80211_bss_info_change_notify(sdata,
1994                                                                  changed);
1995                         } else if (!WARN_ON(!link)) {
1996                                 ieee80211_link_info_change_notify(sdata, link,
1997                                                                   changed);
1998                                 changed = BSS_CHANGED_ASSOC |
1999                                           BSS_CHANGED_IDLE |
2000                                           BSS_CHANGED_PS |
2001                                           BSS_CHANGED_ARP_FILTER;
2002                                 ieee80211_vif_cfg_change_notify(sdata, changed);
2003                         }
2004                         break;
2005                 case NL80211_IFTYPE_OCB:
2006                         changed |= BSS_CHANGED_OCB;
2007                         ieee80211_bss_info_change_notify(sdata, changed);
2008                         break;
2009                 case NL80211_IFTYPE_ADHOC:
2010                         changed |= BSS_CHANGED_IBSS;
2011                         fallthrough;
2012                 case NL80211_IFTYPE_AP:
2013                         changed |= BSS_CHANGED_P2P_PS;
2014
2015                         if (ieee80211_vif_is_mld(&sdata->vif))
2016                                 ieee80211_vif_cfg_change_notify(sdata,
2017                                                                 BSS_CHANGED_SSID);
2018                         else
2019                                 changed |= BSS_CHANGED_SSID;
2020
2021                         if (sdata->vif.bss_conf.ftm_responder == 1 &&
2022                             wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2023                                         NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2024                                 changed |= BSS_CHANGED_FTM_RESPONDER;
2025
2026                         if (sdata->vif.type == NL80211_IFTYPE_AP) {
2027                                 changed |= BSS_CHANGED_AP_PROBE_RESP;
2028
2029                                 if (ieee80211_vif_is_mld(&sdata->vif)) {
2030                                         ieee80211_reconfig_ap_links(local,
2031                                                                     sdata,
2032                                                                     changed);
2033                                         break;
2034                                 }
2035
2036                                 if (rcu_access_pointer(sdata->deflink.u.ap.beacon))
2037                                         drv_start_ap(local, sdata,
2038                                                      sdata->deflink.conf);
2039                         }
2040                         fallthrough;
2041                 case NL80211_IFTYPE_MESH_POINT:
2042                         if (sdata->vif.bss_conf.enable_beacon) {
2043                                 changed |= BSS_CHANGED_BEACON |
2044                                            BSS_CHANGED_BEACON_ENABLED;
2045                                 ieee80211_bss_info_change_notify(sdata, changed);
2046                         }
2047                         break;
2048                 case NL80211_IFTYPE_NAN:
2049                         res = ieee80211_reconfig_nan(sdata);
2050                         if (res < 0) {
2051                                 ieee80211_handle_reconfig_failure(local);
2052                                 return res;
2053                         }
2054                         break;
2055                 case NL80211_IFTYPE_AP_VLAN:
2056                 case NL80211_IFTYPE_MONITOR:
2057                 case NL80211_IFTYPE_P2P_DEVICE:
2058                         /* nothing to do */
2059                         break;
2060                 case NL80211_IFTYPE_UNSPECIFIED:
2061                 case NUM_NL80211_IFTYPES:
2062                 case NL80211_IFTYPE_P2P_CLIENT:
2063                 case NL80211_IFTYPE_P2P_GO:
2064                 case NL80211_IFTYPE_WDS:
2065                         WARN_ON(1);
2066                         break;
2067                 }
2068         }
2069
2070         ieee80211_recalc_ps(local);
2071
2072         /*
2073          * The sta might be in psm against the ap (e.g. because
2074          * this was the state before a hw restart), so we
2075          * explicitly send a null packet in order to make sure
2076          * it'll sync against the ap (and get out of psm).
2077          */
2078         if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2079                 list_for_each_entry(sdata, &local->interfaces, list) {
2080                         if (sdata->vif.type != NL80211_IFTYPE_STATION)
2081                                 continue;
2082                         if (!sdata->u.mgd.associated)
2083                                 continue;
2084
2085                         ieee80211_send_nullfunc(local, sdata, false);
2086                 }
2087         }
2088
2089         /* APs are now beaconing, add back stations */
2090         list_for_each_entry(sdata, &local->interfaces, list) {
2091                 if (!ieee80211_sdata_running(sdata))
2092                         continue;
2093
2094                 switch (sdata->vif.type) {
2095                 case NL80211_IFTYPE_AP_VLAN:
2096                 case NL80211_IFTYPE_AP:
2097                         ieee80211_reconfig_stations(sdata);
2098                         break;
2099                 default:
2100                         break;
2101                 }
2102         }
2103
2104         /* add back keys */
2105         list_for_each_entry(sdata, &local->interfaces, list)
2106                 ieee80211_reenable_keys(sdata);
2107
2108         /* re-enable multi-link for client interfaces */
2109         list_for_each_entry(sdata, &local->interfaces, list) {
2110                 if (sdata->restart_active_links)
2111                         ieee80211_set_active_links(&sdata->vif,
2112                                                    sdata->restart_active_links);
2113                 /*
2114                  * If a link switch was scheduled before the restart, and ran
2115                  * before reconfig, it will do nothing, so re-schedule.
2116                  */
2117                 if (sdata->desired_active_links)
2118                         wiphy_work_queue(sdata->local->hw.wiphy,
2119                                          &sdata->activate_links_work);
2120         }
2121
2122         /* Reconfigure sched scan if it was interrupted by FW restart */
2123         sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2124                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2125         sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2126                                                 lockdep_is_held(&local->hw.wiphy->mtx));
2127         if (sched_scan_sdata && sched_scan_req)
2128                 /*
2129                  * Sched scan stopped, but we don't want to report it. Instead,
2130                  * we're trying to reschedule. However, if more than one scan
2131                  * plan was set, we cannot reschedule since we don't know which
2132                  * scan plan was currently running (and some scan plans may have
2133                  * already finished).
2134                  */
2135                 if (sched_scan_req->n_scan_plans > 1 ||
2136                     __ieee80211_request_sched_scan_start(sched_scan_sdata,
2137                                                          sched_scan_req)) {
2138                         RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2139                         RCU_INIT_POINTER(local->sched_scan_req, NULL);
2140                         sched_scan_stopped = true;
2141                 }
2142
2143         if (sched_scan_stopped)
2144                 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2145
2146  wake_up:
2147         /*
2148          * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2149          * sessions can be established after a resume.
2150          *
2151          * Also tear down aggregation sessions since reconfiguring
2152          * them in a hardware restart scenario is not easily done
2153          * right now, and the hardware will have lost information
2154          * about the sessions, but we and the AP still think they
2155          * are active. This is really a workaround though.
2156          */
2157         if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2158                 list_for_each_entry(sta, &local->sta_list, list) {
2159                         if (!local->resuming)
2160                                 ieee80211_sta_tear_down_BA_sessions(
2161                                                 sta, AGG_STOP_LOCAL_REQUEST);
2162                         clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2163                 }
2164         }
2165
2166         /*
2167          * If this is for hw restart things are still running.
2168          * We may want to change that later, however.
2169          */
2170         if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2171                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2172
2173         if (local->in_reconfig) {
2174                 in_reconfig = local->in_reconfig;
2175                 local->in_reconfig = false;
2176                 barrier();
2177
2178                 ieee80211_reconfig_roc(local);
2179
2180                 /* Requeue all works */
2181                 list_for_each_entry(sdata, &local->interfaces, list) {
2182                         if (ieee80211_sdata_running(sdata))
2183                                 wiphy_work_queue(local->hw.wiphy, &sdata->work);
2184                 }
2185         }
2186
2187         ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2188                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2189                                         false);
2190
2191         if (in_reconfig) {
2192                 list_for_each_entry(sdata, &local->interfaces, list) {
2193                         if (!ieee80211_sdata_running(sdata))
2194                                 continue;
2195                         if (sdata->vif.type == NL80211_IFTYPE_STATION)
2196                                 ieee80211_sta_restart(sdata);
2197                 }
2198         }
2199
2200         if (local->virt_monitors > 0 &&
2201             local->virt_monitors == local->open_count)
2202                 ieee80211_add_virtual_monitor(local);
2203
2204         if (!suspended)
2205                 return 0;
2206
2207 #ifdef CONFIG_PM
2208         /* first set suspended false, then resuming */
2209         local->suspended = false;
2210         mb();
2211         local->resuming = false;
2212
2213         ieee80211_flush_completed_scan(local, false);
2214
2215         if (local->open_count && !reconfig_due_to_wowlan)
2216                 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2217
2218         list_for_each_entry(sdata, &local->interfaces, list) {
2219                 if (!ieee80211_sdata_running(sdata))
2220                         continue;
2221                 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2222                         ieee80211_sta_restart(sdata);
2223         }
2224
2225         mod_timer(&local->sta_cleanup, jiffies + 1);
2226 #else
2227         WARN_ON(1);
2228 #endif
2229
2230         return 0;
2231 }
2232
2233 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag)
2234 {
2235         struct ieee80211_sub_if_data *sdata;
2236         struct ieee80211_local *local;
2237         struct ieee80211_key *key;
2238
2239         if (WARN_ON(!vif))
2240                 return;
2241
2242         sdata = vif_to_sdata(vif);
2243         local = sdata->local;
2244
2245         lockdep_assert_wiphy(local->hw.wiphy);
2246
2247         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME &&
2248                     !local->resuming))
2249                 return;
2250
2251         if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART &&
2252                     !local->in_reconfig))
2253                 return;
2254
2255         if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2256                 return;
2257
2258         sdata->flags |= flag;
2259
2260         list_for_each_entry(key, &sdata->key_list, list)
2261                 key->flags |= KEY_FLAG_TAINTED;
2262 }
2263
2264 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif)
2265 {
2266         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART);
2267 }
2268 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect);
2269
2270 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2271 {
2272         ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME);
2273 }
2274 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2275
2276 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata,
2277                            struct ieee80211_link_data *link)
2278 {
2279         struct ieee80211_local *local = sdata->local;
2280         struct ieee80211_chanctx_conf *chanctx_conf;
2281         struct ieee80211_chanctx *chanctx;
2282
2283         lockdep_assert_wiphy(local->hw.wiphy);
2284
2285         chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf,
2286                                                  lockdep_is_held(&local->hw.wiphy->mtx));
2287
2288         /*
2289          * This function can be called from a work, thus it may be possible
2290          * that the chanctx_conf is removed (due to a disconnection, for
2291          * example).
2292          * So nothing should be done in such case.
2293          */
2294         if (!chanctx_conf)
2295                 return;
2296
2297         chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2298         ieee80211_recalc_smps_chanctx(local, chanctx);
2299 }
2300
2301 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata,
2302                                   int link_id)
2303 {
2304         struct ieee80211_local *local = sdata->local;
2305         struct ieee80211_chanctx_conf *chanctx_conf;
2306         struct ieee80211_chanctx *chanctx;
2307         int i;
2308
2309         lockdep_assert_wiphy(local->hw.wiphy);
2310
2311         for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) {
2312                 struct ieee80211_bss_conf *bss_conf;
2313
2314                 if (link_id >= 0 && link_id != i)
2315                         continue;
2316
2317                 rcu_read_lock();
2318                 bss_conf = rcu_dereference(sdata->vif.link_conf[i]);
2319                 if (!bss_conf) {
2320                         rcu_read_unlock();
2321                         continue;
2322                 }
2323
2324                 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf,
2325                                                          lockdep_is_held(&local->hw.wiphy->mtx));
2326                 /*
2327                  * Since we hold the wiphy mutex (checked above)
2328                  * we can take the chanctx_conf pointer out of the
2329                  * RCU critical section, it cannot go away without
2330                  * the mutex. Just the way we reached it could - in
2331                  * theory - go away, but we don't really care and
2332                  * it really shouldn't happen anyway.
2333                  */
2334                 rcu_read_unlock();
2335
2336                 if (!chanctx_conf)
2337                         return;
2338
2339                 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx,
2340                                        conf);
2341                 ieee80211_recalc_chanctx_min_def(local, chanctx, NULL, false);
2342         }
2343 }
2344
2345 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2346 {
2347         size_t pos = offset;
2348
2349         while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2350                 pos += 2 + ies[pos + 1];
2351
2352         return pos;
2353 }
2354
2355 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2356                               u16 cap)
2357 {
2358         __le16 tmp;
2359
2360         *pos++ = WLAN_EID_HT_CAPABILITY;
2361         *pos++ = sizeof(struct ieee80211_ht_cap);
2362         memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2363
2364         /* capability flags */
2365         tmp = cpu_to_le16(cap);
2366         memcpy(pos, &tmp, sizeof(u16));
2367         pos += sizeof(u16);
2368
2369         /* AMPDU parameters */
2370         *pos++ = ht_cap->ampdu_factor |
2371                  (ht_cap->ampdu_density <<
2372                         IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2373
2374         /* MCS set */
2375         memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2376         pos += sizeof(ht_cap->mcs);
2377
2378         /* extended capabilities */
2379         pos += sizeof(__le16);
2380
2381         /* BF capabilities */
2382         pos += sizeof(__le32);
2383
2384         /* antenna selection */
2385         pos += sizeof(u8);
2386
2387         return pos;
2388 }
2389
2390 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2391                                u32 cap)
2392 {
2393         __le32 tmp;
2394
2395         *pos++ = WLAN_EID_VHT_CAPABILITY;
2396         *pos++ = sizeof(struct ieee80211_vht_cap);
2397         memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2398
2399         /* capability flags */
2400         tmp = cpu_to_le32(cap);
2401         memcpy(pos, &tmp, sizeof(u32));
2402         pos += sizeof(u32);
2403
2404         /* VHT MCS set */
2405         memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2406         pos += sizeof(vht_cap->vht_mcs);
2407
2408         return pos;
2409 }
2410
2411 /* this may return more than ieee80211_put_he_6ghz_cap() will need */
2412 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata)
2413 {
2414         const struct ieee80211_sta_he_cap *he_cap;
2415         struct ieee80211_supported_band *sband;
2416         u8 n;
2417
2418         sband = ieee80211_get_sband(sdata);
2419         if (!sband)
2420                 return 0;
2421
2422         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2423         if (!he_cap)
2424                 return 0;
2425
2426         n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2427         return 2 + 1 +
2428                sizeof(he_cap->he_cap_elem) + n +
2429                ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2430                                      he_cap->he_cap_elem.phy_cap_info);
2431 }
2432
2433 static void
2434 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn,
2435                               const struct ieee80211_sta_he_cap *he_cap,
2436                               struct ieee80211_he_cap_elem *elem)
2437 {
2438         u8 ru_limit, max_ru;
2439
2440         *elem = he_cap->he_cap_elem;
2441
2442         switch (conn->bw_limit) {
2443         case IEEE80211_CONN_BW_LIMIT_20:
2444                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242;
2445                 break;
2446         case IEEE80211_CONN_BW_LIMIT_40:
2447                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484;
2448                 break;
2449         case IEEE80211_CONN_BW_LIMIT_80:
2450                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996;
2451                 break;
2452         default:
2453                 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996;
2454                 break;
2455         }
2456
2457         max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2458         max_ru = min(max_ru, ru_limit);
2459         elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK;
2460         elem->phy_cap_info[8] |= max_ru;
2461
2462         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) {
2463                 elem->phy_cap_info[0] &=
2464                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
2465                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
2466                 elem->phy_cap_info[9] &=
2467                         ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM;
2468         }
2469
2470         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
2471                 elem->phy_cap_info[0] &=
2472                         ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G |
2473                           IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G);
2474                 elem->phy_cap_info[5] &=
2475                         ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK;
2476                 elem->phy_cap_info[7] &=
2477                         ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ |
2478                           IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ);
2479         }
2480 }
2481
2482 int ieee80211_put_he_cap(struct sk_buff *skb,
2483                          struct ieee80211_sub_if_data *sdata,
2484                          const struct ieee80211_supported_band *sband,
2485                          const struct ieee80211_conn_settings *conn)
2486 {
2487         const struct ieee80211_sta_he_cap *he_cap;
2488         struct ieee80211_he_cap_elem elem;
2489         u8 *len;
2490         u8 n;
2491         u8 ie_len;
2492
2493         if (!conn)
2494                 conn = &ieee80211_conn_settings_unlimited;
2495
2496         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
2497         if (!he_cap)
2498                 return 0;
2499
2500         /* modify on stack first to calculate 'n' and 'ie_len' correctly */
2501         ieee80211_get_adjusted_he_cap(conn, he_cap, &elem);
2502
2503         n = ieee80211_he_mcs_nss_size(&elem);
2504         ie_len = 2 + 1 +
2505                  sizeof(he_cap->he_cap_elem) + n +
2506                  ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2507                                        he_cap->he_cap_elem.phy_cap_info);
2508
2509         if (skb_tailroom(skb) < ie_len)
2510                 return -ENOBUFS;
2511
2512         skb_put_u8(skb, WLAN_EID_EXTENSION);
2513         len = skb_put(skb, 1); /* We'll set the size later below */
2514         skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY);
2515
2516         /* Fixed data */
2517         skb_put_data(skb, &elem, sizeof(elem));
2518
2519         skb_put_data(skb, &he_cap->he_mcs_nss_supp, n);
2520
2521         /* Check if PPE Threshold should be present */
2522         if ((he_cap->he_cap_elem.phy_cap_info[6] &
2523              IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2524                 goto end;
2525
2526         /*
2527          * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2528          * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2529          */
2530         n = hweight8(he_cap->ppe_thres[0] &
2531                      IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2532         n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2533                    IEEE80211_PPE_THRES_NSS_POS));
2534
2535         /*
2536          * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2537          * total size.
2538          */
2539         n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2540         n = DIV_ROUND_UP(n, 8);
2541
2542         /* Copy PPE Thresholds */
2543         skb_put_data(skb, &he_cap->ppe_thres, n);
2544
2545 end:
2546         *len = skb_tail_pointer(skb) - len - 1;
2547         return 0;
2548 }
2549
2550 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb,
2551                               struct ieee80211_sub_if_data *sdata,
2552                               enum ieee80211_smps_mode smps_mode)
2553 {
2554         struct ieee80211_supported_band *sband;
2555         const struct ieee80211_sband_iftype_data *iftd;
2556         enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2557         __le16 cap;
2558
2559         if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy,
2560                                           BIT(NL80211_BAND_6GHZ),
2561                                           IEEE80211_CHAN_NO_HE))
2562                 return 0;
2563
2564         sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ];
2565
2566         iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2567         if (!iftd)
2568                 return 0;
2569
2570         /* Check for device HE 6 GHz capability before adding element */
2571         if (!iftd->he_6ghz_capa.capa)
2572                 return 0;
2573
2574         cap = iftd->he_6ghz_capa.capa;
2575         cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS);
2576
2577         switch (smps_mode) {
2578         case IEEE80211_SMPS_AUTOMATIC:
2579         case IEEE80211_SMPS_NUM_MODES:
2580                 WARN_ON(1);
2581                 fallthrough;
2582         case IEEE80211_SMPS_OFF:
2583                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2584                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2585                 break;
2586         case IEEE80211_SMPS_STATIC:
2587                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2588                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2589                 break;
2590         case IEEE80211_SMPS_DYNAMIC:
2591                 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2592                                         IEEE80211_HE_6GHZ_CAP_SM_PS);
2593                 break;
2594         }
2595
2596         if (skb_tailroom(skb) < 2 + 1 + sizeof(cap))
2597                 return -ENOBUFS;
2598
2599         skb_put_u8(skb, WLAN_EID_EXTENSION);
2600         skb_put_u8(skb, 1 + sizeof(cap));
2601         skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA);
2602         skb_put_data(skb, &cap, sizeof(cap));
2603         return 0;
2604 }
2605
2606 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2607                                const struct cfg80211_chan_def *chandef,
2608                                u16 prot_mode, bool rifs_mode)
2609 {
2610         struct ieee80211_ht_operation *ht_oper;
2611         /* Build HT Information */
2612         *pos++ = WLAN_EID_HT_OPERATION;
2613         *pos++ = sizeof(struct ieee80211_ht_operation);
2614         ht_oper = (struct ieee80211_ht_operation *)pos;
2615         ht_oper->primary_chan = ieee80211_frequency_to_channel(
2616                                         chandef->chan->center_freq);
2617         switch (chandef->width) {
2618         case NL80211_CHAN_WIDTH_160:
2619         case NL80211_CHAN_WIDTH_80P80:
2620         case NL80211_CHAN_WIDTH_80:
2621         case NL80211_CHAN_WIDTH_40:
2622                 if (chandef->center_freq1 > chandef->chan->center_freq)
2623                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2624                 else
2625                         ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2626                 break;
2627         case NL80211_CHAN_WIDTH_320:
2628                 /* HT information element should not be included on 6GHz */
2629                 WARN_ON(1);
2630                 return pos;
2631         default:
2632                 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2633                 break;
2634         }
2635         if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2636             chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2637             chandef->width != NL80211_CHAN_WIDTH_20)
2638                 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2639
2640         if (rifs_mode)
2641                 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2642
2643         ht_oper->operation_mode = cpu_to_le16(prot_mode);
2644         ht_oper->stbc_param = 0x0000;
2645
2646         /* It seems that Basic MCS set and Supported MCS set
2647            are identical for the first 10 bytes */
2648         memset(&ht_oper->basic_set, 0, 16);
2649         memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2650
2651         return pos + sizeof(struct ieee80211_ht_operation);
2652 }
2653
2654 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2655                                    const struct cfg80211_chan_def *chandef)
2656 {
2657         *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH;       /* EID */
2658         *pos++ = 3;                                     /* IE length */
2659         /* New channel width */
2660         switch (chandef->width) {
2661         case NL80211_CHAN_WIDTH_80:
2662                 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2663                 break;
2664         case NL80211_CHAN_WIDTH_160:
2665                 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2666                 break;
2667         case NL80211_CHAN_WIDTH_80P80:
2668                 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2669                 break;
2670         case NL80211_CHAN_WIDTH_320:
2671                 /* The behavior is not defined for 320 MHz channels */
2672                 WARN_ON(1);
2673                 fallthrough;
2674         default:
2675                 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2676         }
2677
2678         /* new center frequency segment 0 */
2679         *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2680         /* new center frequency segment 1 */
2681         if (chandef->center_freq2)
2682                 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2683         else
2684                 *pos++ = 0;
2685 }
2686
2687 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2688                                 const struct cfg80211_chan_def *chandef)
2689 {
2690         struct ieee80211_vht_operation *vht_oper;
2691
2692         *pos++ = WLAN_EID_VHT_OPERATION;
2693         *pos++ = sizeof(struct ieee80211_vht_operation);
2694         vht_oper = (struct ieee80211_vht_operation *)pos;
2695         vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2696                                                         chandef->center_freq1);
2697         if (chandef->center_freq2)
2698                 vht_oper->center_freq_seg1_idx =
2699                         ieee80211_frequency_to_channel(chandef->center_freq2);
2700         else
2701                 vht_oper->center_freq_seg1_idx = 0x00;
2702
2703         switch (chandef->width) {
2704         case NL80211_CHAN_WIDTH_160:
2705                 /*
2706                  * Convert 160 MHz channel width to new style as interop
2707                  * workaround.
2708                  */
2709                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2710                 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2711                 if (chandef->chan->center_freq < chandef->center_freq1)
2712                         vht_oper->center_freq_seg0_idx -= 8;
2713                 else
2714                         vht_oper->center_freq_seg0_idx += 8;
2715                 break;
2716         case NL80211_CHAN_WIDTH_80P80:
2717                 /*
2718                  * Convert 80+80 MHz channel width to new style as interop
2719                  * workaround.
2720                  */
2721                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2722                 break;
2723         case NL80211_CHAN_WIDTH_80:
2724                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2725                 break;
2726         case NL80211_CHAN_WIDTH_320:
2727                 /* VHT information element should not be included on 6GHz */
2728                 WARN_ON(1);
2729                 return pos;
2730         default:
2731                 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2732                 break;
2733         }
2734
2735         /* don't require special VHT peer rates */
2736         vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2737
2738         return pos + sizeof(struct ieee80211_vht_operation);
2739 }
2740
2741 u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef)
2742 {
2743         struct ieee80211_he_operation *he_oper;
2744         struct ieee80211_he_6ghz_oper *he_6ghz_op;
2745         struct cfg80211_chan_def he_chandef;
2746         u32 he_oper_params;
2747         u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
2748
2749         if (chandef->chan->band == NL80211_BAND_6GHZ)
2750                 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
2751
2752         *pos++ = WLAN_EID_EXTENSION;
2753         *pos++ = ie_len;
2754         *pos++ = WLAN_EID_EXT_HE_OPERATION;
2755
2756         he_oper_params = 0;
2757         he_oper_params |= u32_encode_bits(1023, /* disabled */
2758                                 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2759         he_oper_params |= u32_encode_bits(1,
2760                                 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2761         he_oper_params |= u32_encode_bits(1,
2762                                 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2763         if (chandef->chan->band == NL80211_BAND_6GHZ)
2764                 he_oper_params |= u32_encode_bits(1,
2765                                 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
2766
2767         he_oper = (struct ieee80211_he_operation *)pos;
2768         he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2769
2770         /* don't require special HE peer rates */
2771         he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2772         pos += sizeof(struct ieee80211_he_operation);
2773
2774         if (chandef->chan->band != NL80211_BAND_6GHZ)
2775                 goto out;
2776
2777         cfg80211_chandef_create(&he_chandef, chandef->chan, NL80211_CHAN_NO_HT);
2778         he_chandef.center_freq1 = chandef->center_freq1;
2779         he_chandef.center_freq2 = chandef->center_freq2;
2780         he_chandef.width = chandef->width;
2781
2782         /* TODO add VHT operational */
2783         he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
2784         he_6ghz_op->minrate = 6; /* 6 Mbps */
2785         he_6ghz_op->primary =
2786                 ieee80211_frequency_to_channel(he_chandef.chan->center_freq);
2787         he_6ghz_op->ccfs0 =
2788                 ieee80211_frequency_to_channel(he_chandef.center_freq1);
2789         if (he_chandef.center_freq2)
2790                 he_6ghz_op->ccfs1 =
2791                         ieee80211_frequency_to_channel(he_chandef.center_freq2);
2792         else
2793                 he_6ghz_op->ccfs1 = 0;
2794
2795         switch (he_chandef.width) {
2796         case NL80211_CHAN_WIDTH_320:
2797                 /* Downgrade EHT 320 MHz BW to 160 MHz for HE and set new
2798                  * center_freq1
2799                  */
2800                 ieee80211_chandef_downgrade(&he_chandef, NULL);
2801                 he_6ghz_op->ccfs0 =
2802                         ieee80211_frequency_to_channel(he_chandef.center_freq1);
2803                 fallthrough;
2804         case NL80211_CHAN_WIDTH_160:
2805                 /* Convert 160 MHz channel width to new style as interop
2806                  * workaround.
2807                  */
2808                 he_6ghz_op->control =
2809                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2810                 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
2811                 if (he_chandef.chan->center_freq < he_chandef.center_freq1)
2812                         he_6ghz_op->ccfs0 -= 8;
2813                 else
2814                         he_6ghz_op->ccfs0 += 8;
2815                 fallthrough;
2816         case NL80211_CHAN_WIDTH_80P80:
2817                 he_6ghz_op->control =
2818                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
2819                 break;
2820         case NL80211_CHAN_WIDTH_80:
2821                 he_6ghz_op->control =
2822                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
2823                 break;
2824         case NL80211_CHAN_WIDTH_40:
2825                 he_6ghz_op->control =
2826                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
2827                 break;
2828         default:
2829                 he_6ghz_op->control =
2830                         IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
2831                 break;
2832         }
2833
2834         pos += sizeof(struct ieee80211_he_6ghz_oper);
2835
2836 out:
2837         return pos;
2838 }
2839
2840 u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef,
2841                                 const struct ieee80211_sta_eht_cap *eht_cap)
2842
2843 {
2844         const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss =
2845                                         &eht_cap->eht_mcs_nss_supp.only_20mhz;
2846         struct ieee80211_eht_operation *eht_oper;
2847         struct ieee80211_eht_operation_info *eht_oper_info;
2848         u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional);
2849         u8 eht_oper_info_len =
2850                 offsetof(struct ieee80211_eht_operation_info, optional);
2851         u8 chan_width = 0;
2852
2853         *pos++ = WLAN_EID_EXTENSION;
2854         *pos++ = 1 + eht_oper_len + eht_oper_info_len;
2855         *pos++ = WLAN_EID_EXT_EHT_OPERATION;
2856
2857         eht_oper = (struct ieee80211_eht_operation *)pos;
2858
2859         memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss));
2860         eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT;
2861         pos += eht_oper_len;
2862
2863         eht_oper_info =
2864                 (struct ieee80211_eht_operation_info *)eht_oper->optional;
2865
2866         eht_oper_info->ccfs0 =
2867                 ieee80211_frequency_to_channel(chandef->center_freq1);
2868         if (chandef->center_freq2)
2869                 eht_oper_info->ccfs1 =
2870                         ieee80211_frequency_to_channel(chandef->center_freq2);
2871         else
2872                 eht_oper_info->ccfs1 = 0;
2873
2874         switch (chandef->width) {
2875         case NL80211_CHAN_WIDTH_320:
2876                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ;
2877                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2878                 if (chandef->chan->center_freq < chandef->center_freq1)
2879                         eht_oper_info->ccfs0 -= 16;
2880                 else
2881                         eht_oper_info->ccfs0 += 16;
2882                 break;
2883         case NL80211_CHAN_WIDTH_160:
2884                 eht_oper_info->ccfs1 = eht_oper_info->ccfs0;
2885                 if (chandef->chan->center_freq < chandef->center_freq1)
2886                         eht_oper_info->ccfs0 -= 8;
2887                 else
2888                         eht_oper_info->ccfs0 += 8;
2889                 fallthrough;
2890         case NL80211_CHAN_WIDTH_80P80:
2891                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ;
2892                 break;
2893         case NL80211_CHAN_WIDTH_80:
2894                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ;
2895                 break;
2896         case NL80211_CHAN_WIDTH_40:
2897                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ;
2898                 break;
2899         default:
2900                 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ;
2901                 break;
2902         }
2903         eht_oper_info->control = chan_width;
2904         pos += eht_oper_info_len;
2905
2906         /* TODO: eht_oper_info->optional */
2907
2908         return pos;
2909 }
2910
2911 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2912                                struct cfg80211_chan_def *chandef)
2913 {
2914         enum nl80211_channel_type channel_type;
2915
2916         if (!ht_oper)
2917                 return false;
2918
2919         switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2920         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2921                 channel_type = NL80211_CHAN_HT20;
2922                 break;
2923         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2924                 channel_type = NL80211_CHAN_HT40PLUS;
2925                 break;
2926         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2927                 channel_type = NL80211_CHAN_HT40MINUS;
2928                 break;
2929         default:
2930                 return false;
2931         }
2932
2933         cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2934         return true;
2935 }
2936
2937 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
2938                                 const struct ieee80211_vht_operation *oper,
2939                                 const struct ieee80211_ht_operation *htop,
2940                                 struct cfg80211_chan_def *chandef)
2941 {
2942         struct cfg80211_chan_def new = *chandef;
2943         int cf0, cf1;
2944         int ccfs0, ccfs1, ccfs2;
2945         int ccf0, ccf1;
2946         u32 vht_cap;
2947         bool support_80_80 = false;
2948         bool support_160 = false;
2949         u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
2950                                           IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
2951         u8 supp_chwidth = u32_get_bits(vht_cap_info,
2952                                        IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
2953
2954         if (!oper || !htop)
2955                 return false;
2956
2957         vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
2958         support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
2959                                   IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
2960         support_80_80 = ((vht_cap &
2961                          IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
2962                         (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
2963                          vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
2964                         ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
2965                                     IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
2966         ccfs0 = oper->center_freq_seg0_idx;
2967         ccfs1 = oper->center_freq_seg1_idx;
2968         ccfs2 = (le16_to_cpu(htop->operation_mode) &
2969                                 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2970                         >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2971
2972         ccf0 = ccfs0;
2973
2974         /* if not supported, parse as though we didn't understand it */
2975         if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2976                 ext_nss_bw_supp = 0;
2977
2978         /*
2979          * Cf. IEEE 802.11 Table 9-250
2980          *
2981          * We really just consider that because it's inefficient to connect
2982          * at a higher bandwidth than we'll actually be able to use.
2983          */
2984         switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
2985         default:
2986         case 0x00:
2987                 ccf1 = 0;
2988                 support_160 = false;
2989                 support_80_80 = false;
2990                 break;
2991         case 0x01:
2992                 support_80_80 = false;
2993                 fallthrough;
2994         case 0x02:
2995         case 0x03:
2996                 ccf1 = ccfs2;
2997                 break;
2998         case 0x10:
2999                 ccf1 = ccfs1;
3000                 break;
3001         case 0x11:
3002         case 0x12:
3003                 if (!ccfs1)
3004                         ccf1 = ccfs2;
3005                 else
3006                         ccf1 = ccfs1;
3007                 break;
3008         case 0x13:
3009         case 0x20:
3010         case 0x23:
3011                 ccf1 = ccfs1;
3012                 break;
3013         }
3014
3015         cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3016         cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3017
3018         switch (oper->chan_width) {
3019         case IEEE80211_VHT_CHANWIDTH_USE_HT:
3020                 /* just use HT information directly */
3021                 break;
3022         case IEEE80211_VHT_CHANWIDTH_80MHZ:
3023                 new.width = NL80211_CHAN_WIDTH_80;
3024                 new.center_freq1 = cf0;
3025                 /* If needed, adjust based on the newer interop workaround. */
3026                 if (ccf1) {
3027                         unsigned int diff;
3028
3029                         diff = abs(ccf1 - ccf0);
3030                         if ((diff == 8) && support_160) {
3031                                 new.width = NL80211_CHAN_WIDTH_160;
3032                                 new.center_freq1 = cf1;
3033                         } else if ((diff > 8) && support_80_80) {
3034                                 new.width = NL80211_CHAN_WIDTH_80P80;
3035                                 new.center_freq2 = cf1;
3036                         }
3037                 }
3038                 break;
3039         case IEEE80211_VHT_CHANWIDTH_160MHZ:
3040                 /* deprecated encoding */
3041                 new.width = NL80211_CHAN_WIDTH_160;
3042                 new.center_freq1 = cf0;
3043                 break;
3044         case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3045                 /* deprecated encoding */
3046                 new.width = NL80211_CHAN_WIDTH_80P80;
3047                 new.center_freq1 = cf0;
3048                 new.center_freq2 = cf1;
3049                 break;
3050         default:
3051                 return false;
3052         }
3053
3054         if (!cfg80211_chandef_valid(&new))
3055                 return false;
3056
3057         *chandef = new;
3058         return true;
3059 }
3060
3061 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info,
3062                                 struct cfg80211_chan_def *chandef)
3063 {
3064         chandef->center_freq1 =
3065                 ieee80211_channel_to_frequency(info->ccfs0,
3066                                                chandef->chan->band);
3067
3068         switch (u8_get_bits(info->control,
3069                             IEEE80211_EHT_OPER_CHAN_WIDTH)) {
3070         case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ:
3071                 chandef->width = NL80211_CHAN_WIDTH_20;
3072                 break;
3073         case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ:
3074                 chandef->width = NL80211_CHAN_WIDTH_40;
3075                 break;
3076         case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ:
3077                 chandef->width = NL80211_CHAN_WIDTH_80;
3078                 break;
3079         case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ:
3080                 chandef->width = NL80211_CHAN_WIDTH_160;
3081                 chandef->center_freq1 =
3082                         ieee80211_channel_to_frequency(info->ccfs1,
3083                                                        chandef->chan->band);
3084                 break;
3085         case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ:
3086                 chandef->width = NL80211_CHAN_WIDTH_320;
3087                 chandef->center_freq1 =
3088                         ieee80211_channel_to_frequency(info->ccfs1,
3089                                                        chandef->chan->band);
3090                 break;
3091         }
3092 }
3093
3094 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local,
3095                                     const struct ieee80211_he_operation *he_oper,
3096                                     const struct ieee80211_eht_operation *eht_oper,
3097                                     struct cfg80211_chan_def *chandef)
3098 {
3099         struct cfg80211_chan_def he_chandef = *chandef;
3100         const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3101         u32 freq;
3102
3103         if (chandef->chan->band != NL80211_BAND_6GHZ)
3104                 return true;
3105
3106         if (!he_oper)
3107                 return false;
3108
3109         he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3110         if (!he_6ghz_oper)
3111                 return false;
3112
3113         /*
3114          * The EHT operation IE does not contain the primary channel so the
3115          * primary channel frequency should be taken from the 6 GHz operation
3116          * information.
3117          */
3118         freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3119                                               NL80211_BAND_6GHZ);
3120         he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq);
3121
3122         if (!he_chandef.chan)
3123                 return false;
3124
3125         if (!eht_oper ||
3126             !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) {
3127                 switch (u8_get_bits(he_6ghz_oper->control,
3128                                     IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3129                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3130                         he_chandef.width = NL80211_CHAN_WIDTH_20;
3131                         break;
3132                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3133                         he_chandef.width = NL80211_CHAN_WIDTH_40;
3134                         break;
3135                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3136                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3137                         break;
3138                 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3139                         he_chandef.width = NL80211_CHAN_WIDTH_80;
3140                         if (!he_6ghz_oper->ccfs1)
3141                                 break;
3142                         if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8)
3143                                 he_chandef.width = NL80211_CHAN_WIDTH_160;
3144                         else
3145                                 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3146                         break;
3147                 }
3148
3149                 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3150                         he_chandef.center_freq1 =
3151                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3152                                                                NL80211_BAND_6GHZ);
3153                 } else {
3154                         he_chandef.center_freq1 =
3155                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3156                                                                NL80211_BAND_6GHZ);
3157                         he_chandef.center_freq2 =
3158                                 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3159                                                                NL80211_BAND_6GHZ);
3160                 }
3161         } else {
3162                 ieee80211_chandef_eht_oper((const void *)eht_oper->optional,
3163                                            &he_chandef);
3164                 he_chandef.punctured =
3165                         ieee80211_eht_oper_dis_subchan_bitmap(eht_oper);
3166         }
3167
3168         if (!cfg80211_chandef_valid(&he_chandef))
3169                 return false;
3170
3171         *chandef = he_chandef;
3172
3173         return true;
3174 }
3175
3176 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3177                                 struct cfg80211_chan_def *chandef)
3178 {
3179         u32 oper_freq;
3180
3181         if (!oper)
3182                 return false;
3183
3184         switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3185         case IEEE80211_S1G_CHANWIDTH_1MHZ:
3186                 chandef->width = NL80211_CHAN_WIDTH_1;
3187                 break;
3188         case IEEE80211_S1G_CHANWIDTH_2MHZ:
3189                 chandef->width = NL80211_CHAN_WIDTH_2;
3190                 break;
3191         case IEEE80211_S1G_CHANWIDTH_4MHZ:
3192                 chandef->width = NL80211_CHAN_WIDTH_4;
3193                 break;
3194         case IEEE80211_S1G_CHANWIDTH_8MHZ:
3195                 chandef->width = NL80211_CHAN_WIDTH_8;
3196                 break;
3197         case IEEE80211_S1G_CHANWIDTH_16MHZ:
3198                 chandef->width = NL80211_CHAN_WIDTH_16;
3199                 break;
3200         default:
3201                 return false;
3202         }
3203
3204         oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3205                                                   NL80211_BAND_S1GHZ);
3206         chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3207         chandef->freq1_offset = oper_freq % 1000;
3208
3209         return true;
3210 }
3211
3212 int ieee80211_put_srates_elem(struct sk_buff *skb,
3213                               const struct ieee80211_supported_band *sband,
3214                               u32 basic_rates, u32 masked_rates,
3215                               u8 element_id)
3216 {
3217         u8 i, rates, skip;
3218
3219         rates = 0;
3220         for (i = 0; i < sband->n_bitrates; i++) {
3221                 if (masked_rates & BIT(i))
3222                         continue;
3223                 rates++;
3224         }
3225
3226         if (element_id == WLAN_EID_SUPP_RATES) {
3227                 rates = min_t(u8, rates, 8);
3228                 skip = 0;
3229         } else {
3230                 skip = 8;
3231                 if (rates <= skip)
3232                         return 0;
3233                 rates -= skip;
3234         }
3235
3236         if (skb_tailroom(skb) < rates + 2)
3237                 return -ENOBUFS;
3238
3239         skb_put_u8(skb, element_id);
3240         skb_put_u8(skb, rates);
3241
3242         for (i = 0; i < sband->n_bitrates && rates; i++) {
3243                 int rate;
3244                 u8 basic;
3245
3246                 if (masked_rates & BIT(i))
3247                         continue;
3248
3249                 if (skip > 0) {
3250                         skip--;
3251                         continue;
3252                 }
3253
3254                 basic = basic_rates & BIT(i) ? 0x80 : 0;
3255
3256                 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5);
3257                 skb_put_u8(skb, basic | (u8)rate);
3258                 rates--;
3259         }
3260
3261         WARN(rates > 0, "rates confused: rates:%d, element:%d\n",
3262              rates, element_id);
3263
3264         return 0;
3265 }
3266
3267 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3268 {
3269         struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3270
3271         if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION))
3272                 return 0;
3273
3274         return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal);
3275 }
3276 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3277
3278 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3279 {
3280         if (!mcs)
3281                 return 1;
3282
3283         /* TODO: consider rx_highest */
3284
3285         if (mcs->rx_mask[3])
3286                 return 4;
3287         if (mcs->rx_mask[2])
3288                 return 3;
3289         if (mcs->rx_mask[1])
3290                 return 2;
3291         return 1;
3292 }
3293
3294 /**
3295  * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3296  * @local: mac80211 hw info struct
3297  * @status: RX status
3298  * @mpdu_len: total MPDU length (including FCS)
3299  * @mpdu_offset: offset into MPDU to calculate timestamp at
3300  *
3301  * This function calculates the RX timestamp at the given MPDU offset, taking
3302  * into account what the RX timestamp was. An offset of 0 will just normalize
3303  * the timestamp to TSF at beginning of MPDU reception.
3304  *
3305  * Returns: the calculated timestamp
3306  */
3307 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3308                                      struct ieee80211_rx_status *status,
3309                                      unsigned int mpdu_len,
3310                                      unsigned int mpdu_offset)
3311 {
3312         u64 ts = status->mactime;
3313         bool mactime_plcp_start;
3314         struct rate_info ri;
3315         u16 rate;
3316         u8 n_ltf;
3317
3318         if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3319                 return 0;
3320
3321         mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) ==
3322                                 RX_FLAG_MACTIME_PLCP_START;
3323
3324         memset(&ri, 0, sizeof(ri));
3325
3326         ri.bw = status->bw;
3327
3328         /* Fill cfg80211 rate info */
3329         switch (status->encoding) {
3330         case RX_ENC_EHT:
3331                 ri.flags |= RATE_INFO_FLAGS_EHT_MCS;
3332                 ri.mcs = status->rate_idx;
3333                 ri.nss = status->nss;
3334                 ri.eht_ru_alloc = status->eht.ru;
3335                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3336                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3337                 /* TODO/FIXME: is this right? handle other PPDUs */
3338                 if (mactime_plcp_start) {
3339                         mpdu_offset += 2;
3340                         ts += 36;
3341                 }
3342                 break;
3343         case RX_ENC_HE:
3344                 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3345                 ri.mcs = status->rate_idx;
3346                 ri.nss = status->nss;
3347                 ri.he_ru_alloc = status->he_ru;
3348                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3349                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3350
3351                 /*
3352                  * See P802.11ax_D6.0, section 27.3.4 for
3353                  * VHT PPDU format.
3354                  */
3355                 if (mactime_plcp_start) {
3356                         mpdu_offset += 2;
3357                         ts += 36;
3358
3359                         /*
3360                          * TODO:
3361                          * For HE MU PPDU, add the HE-SIG-B.
3362                          * For HE ER PPDU, add 8us for the HE-SIG-A.
3363                          * For HE TB PPDU, add 4us for the HE-STF.
3364                          * Add the HE-LTF durations - variable.
3365                          */
3366                 }
3367
3368                 break;
3369         case RX_ENC_HT:
3370                 ri.mcs = status->rate_idx;
3371                 ri.flags |= RATE_INFO_FLAGS_MCS;
3372                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3373                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3374
3375                 /*
3376                  * See P802.11REVmd_D3.0, section 19.3.2 for
3377                  * HT PPDU format.
3378                  */
3379                 if (mactime_plcp_start) {
3380                         mpdu_offset += 2;
3381                         if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3382                                 ts += 24;
3383                         else
3384                                 ts += 32;
3385
3386                         /*
3387                          * Add Data HT-LTFs per streams
3388                          * TODO: add Extension HT-LTFs, 4us per LTF
3389                          */
3390                         n_ltf = ((ri.mcs >> 3) & 3) + 1;
3391                         n_ltf = n_ltf == 3 ? 4 : n_ltf;
3392                         ts += n_ltf * 4;
3393                 }
3394
3395                 break;
3396         case RX_ENC_VHT:
3397                 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3398                 ri.mcs = status->rate_idx;
3399                 ri.nss = status->nss;
3400                 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3401                         ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3402
3403                 /*
3404                  * See P802.11REVmd_D3.0, section 21.3.2 for
3405                  * VHT PPDU format.
3406                  */
3407                 if (mactime_plcp_start) {
3408                         mpdu_offset += 2;
3409                         ts += 36;
3410
3411                         /*
3412                          * Add VHT-LTFs per streams
3413                          */
3414                         n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3415                                 ri.nss + 1 : ri.nss;
3416                         ts += 4 * n_ltf;
3417                 }
3418
3419                 break;
3420         default:
3421                 WARN_ON(1);
3422                 fallthrough;
3423         case RX_ENC_LEGACY: {
3424                 struct ieee80211_supported_band *sband;
3425
3426                 sband = local->hw.wiphy->bands[status->band];
3427                 ri.legacy = sband->bitrates[status->rate_idx].bitrate;
3428
3429                 if (mactime_plcp_start) {
3430                         if (status->band == NL80211_BAND_5GHZ) {
3431                                 ts += 20;
3432                                 mpdu_offset += 2;
3433                         } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3434                                 ts += 96;
3435                         } else {
3436                                 ts += 192;
3437                         }
3438                 }
3439                 break;
3440                 }
3441         }
3442
3443         rate = cfg80211_calculate_bitrate(&ri);
3444         if (WARN_ONCE(!rate,
3445                       "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3446                       (unsigned long long)status->flag, status->rate_idx,
3447                       status->nss))
3448                 return 0;
3449
3450         /* rewind from end of MPDU */
3451         if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END)
3452                 ts -= mpdu_len * 8 * 10 / rate;
3453
3454         ts += mpdu_offset * 8 * 10 / rate;
3455
3456         return ts;
3457 }
3458
3459 /* Cancel CAC for the interfaces under the specified @local. If @ctx is
3460  * also provided, only the interfaces using that ctx will be canceled.
3461  */
3462 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local,
3463                               struct ieee80211_chanctx *ctx)
3464 {
3465         struct ieee80211_sub_if_data *sdata;
3466         struct cfg80211_chan_def chandef;
3467         struct ieee80211_link_data *link;
3468         struct ieee80211_chanctx_conf *chanctx_conf;
3469         unsigned int link_id;
3470
3471         lockdep_assert_wiphy(local->hw.wiphy);
3472
3473         list_for_each_entry(sdata, &local->interfaces, list) {
3474                 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
3475                      link_id++) {
3476                         link = sdata_dereference(sdata->link[link_id],
3477                                                  sdata);
3478                         if (!link)
3479                                 continue;
3480
3481                         chanctx_conf = sdata_dereference(link->conf->chanctx_conf,
3482                                                          sdata);
3483                         if (ctx && &ctx->conf != chanctx_conf)
3484                                 continue;
3485
3486                         wiphy_delayed_work_cancel(local->hw.wiphy,
3487                                                   &link->dfs_cac_timer_work);
3488
3489                         if (!sdata->wdev.links[link_id].cac_started)
3490                                 continue;
3491
3492                         chandef = link->conf->chanreq.oper;
3493                         ieee80211_link_release_channel(link);
3494                         cfg80211_cac_event(sdata->dev, &chandef,
3495                                            NL80211_RADAR_CAC_ABORTED,
3496                                            GFP_KERNEL, link_id);
3497                 }
3498         }
3499 }
3500
3501 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy,
3502                                        struct wiphy_work *work)
3503 {
3504         struct ieee80211_local *local =
3505                 container_of(work, struct ieee80211_local, radar_detected_work);
3506         struct cfg80211_chan_def chandef;
3507         struct ieee80211_chanctx *ctx;
3508
3509         lockdep_assert_wiphy(local->hw.wiphy);
3510
3511         list_for_each_entry(ctx, &local->chanctx_list, list) {
3512                 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3513                         continue;
3514
3515                 if (!ctx->radar_detected)
3516                         continue;
3517
3518                 ctx->radar_detected = false;
3519
3520                 chandef = ctx->conf.def;
3521
3522                 ieee80211_dfs_cac_cancel(local, ctx);
3523                 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3524         }
3525 }
3526
3527 static void
3528 ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw,
3529                                        struct ieee80211_chanctx_conf *chanctx_conf,
3530                                        void *data)
3531 {
3532         struct ieee80211_chanctx *ctx =
3533                 container_of(chanctx_conf, struct ieee80211_chanctx,
3534                              conf);
3535
3536         if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3537                 return;
3538
3539         if (data && data != chanctx_conf)
3540                 return;
3541
3542         ctx->radar_detected = true;
3543 }
3544
3545 void ieee80211_radar_detected(struct ieee80211_hw *hw,
3546                               struct ieee80211_chanctx_conf *chanctx_conf)
3547 {
3548         struct ieee80211_local *local = hw_to_local(hw);
3549
3550         trace_api_radar_detected(local);
3551
3552         ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator,
3553                                             chanctx_conf);
3554
3555         wiphy_work_queue(hw->wiphy, &local->radar_detected_work);
3556 }
3557 EXPORT_SYMBOL(ieee80211_radar_detected);
3558
3559 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c,
3560                                  struct ieee80211_conn_settings *conn)
3561 {
3562         enum nl80211_chan_width new_primary_width;
3563         struct ieee80211_conn_settings _ignored = {};
3564
3565         /* allow passing NULL if caller doesn't care */
3566         if (!conn)
3567                 conn = &_ignored;
3568
3569 again:
3570         /* no-HT indicates nothing to do */
3571         new_primary_width = NL80211_CHAN_WIDTH_20_NOHT;
3572
3573         switch (c->width) {
3574         default:
3575         case NL80211_CHAN_WIDTH_20_NOHT:
3576                 WARN_ON_ONCE(1);
3577                 fallthrough;
3578         case NL80211_CHAN_WIDTH_20:
3579                 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3580                 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3581                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3582                 c->punctured = 0;
3583                 break;
3584         case NL80211_CHAN_WIDTH_40:
3585                 c->width = NL80211_CHAN_WIDTH_20;
3586                 c->center_freq1 = c->chan->center_freq;
3587                 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3588                         conn->mode = IEEE80211_CONN_MODE_HT;
3589                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3590                 c->punctured = 0;
3591                 break;
3592         case NL80211_CHAN_WIDTH_80:
3593                 new_primary_width = NL80211_CHAN_WIDTH_40;
3594                 if (conn->mode == IEEE80211_CONN_MODE_VHT)
3595                         conn->mode = IEEE80211_CONN_MODE_HT;
3596                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40;
3597                 break;
3598         case NL80211_CHAN_WIDTH_80P80:
3599                 c->center_freq2 = 0;
3600                 c->width = NL80211_CHAN_WIDTH_80;
3601                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3602                 break;
3603         case NL80211_CHAN_WIDTH_160:
3604                 new_primary_width = NL80211_CHAN_WIDTH_80;
3605                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80;
3606                 break;
3607         case NL80211_CHAN_WIDTH_320:
3608                 new_primary_width = NL80211_CHAN_WIDTH_160;
3609                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160;
3610                 break;
3611         case NL80211_CHAN_WIDTH_1:
3612         case NL80211_CHAN_WIDTH_2:
3613         case NL80211_CHAN_WIDTH_4:
3614         case NL80211_CHAN_WIDTH_8:
3615         case NL80211_CHAN_WIDTH_16:
3616                 WARN_ON_ONCE(1);
3617                 /* keep c->width */
3618                 conn->mode = IEEE80211_CONN_MODE_S1G;
3619                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3620                 break;
3621         case NL80211_CHAN_WIDTH_5:
3622         case NL80211_CHAN_WIDTH_10:
3623                 WARN_ON_ONCE(1);
3624                 /* keep c->width */
3625                 conn->mode = IEEE80211_CONN_MODE_LEGACY;
3626                 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20;
3627                 break;
3628         }
3629
3630         if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) {
3631                 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width,
3632                                                            &c->punctured);
3633                 c->width = new_primary_width;
3634         }
3635
3636         /*
3637          * With an 80 MHz channel, we might have the puncturing in the primary
3638          * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.
3639          * In that case, downgrade again.
3640          */
3641         if (!cfg80211_chandef_valid(c) && c->punctured)
3642                 goto again;
3643
3644         WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3645 }
3646
3647 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3648                               struct cfg80211_csa_settings *csa_settings)
3649 {
3650         struct sk_buff *skb;
3651         struct ieee80211_mgmt *mgmt;
3652         struct ieee80211_local *local = sdata->local;
3653         int freq;
3654         int hdr_len = offsetofend(struct ieee80211_mgmt,
3655                                   u.action.u.chan_switch);
3656         u8 *pos;
3657
3658         if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3659             sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3660                 return -EOPNOTSUPP;
3661
3662         skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3663                             5 + /* channel switch announcement element */
3664                             3 + /* secondary channel offset element */
3665                             5 + /* wide bandwidth channel switch announcement */
3666                             8); /* mesh channel switch parameters element */
3667         if (!skb)
3668                 return -ENOMEM;
3669
3670         skb_reserve(skb, local->tx_headroom);
3671         mgmt = skb_put_zero(skb, hdr_len);
3672         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3673                                           IEEE80211_STYPE_ACTION);
3674
3675         eth_broadcast_addr(mgmt->da);
3676         memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3677         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3678                 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3679         } else {
3680                 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3681                 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3682         }
3683         mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3684         mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3685         pos = skb_put(skb, 5);
3686         *pos++ = WLAN_EID_CHANNEL_SWITCH;                       /* EID */
3687         *pos++ = 3;                                             /* IE length */
3688         *pos++ = csa_settings->block_tx ? 1 : 0;                /* CSA mode */
3689         freq = csa_settings->chandef.chan->center_freq;
3690         *pos++ = ieee80211_frequency_to_channel(freq);          /* channel */
3691         *pos++ = csa_settings->count;                           /* count */
3692
3693         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3694                 enum nl80211_channel_type ch_type;
3695
3696                 skb_put(skb, 3);
3697                 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;     /* EID */
3698                 *pos++ = 1;                                     /* IE length */
3699                 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3700                 if (ch_type == NL80211_CHAN_HT40PLUS)
3701                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3702                 else
3703                         *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3704         }
3705
3706         if (ieee80211_vif_is_mesh(&sdata->vif)) {
3707                 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3708
3709                 skb_put(skb, 8);
3710                 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM;            /* EID */
3711                 *pos++ = 6;                                     /* IE length */
3712                 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL;     /* Mesh TTL */
3713                 *pos = 0x00;    /* Mesh Flag: Tx Restrict, Initiator, Reason */
3714                 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3715                 *pos++ |= csa_settings->block_tx ?
3716                           WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3717                 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3718                 pos += 2;
3719                 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3720                 pos += 2;
3721         }
3722
3723         if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3724             csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3725             csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3726                 skb_put(skb, 5);
3727                 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3728         }
3729
3730         ieee80211_tx_skb(sdata, skb);
3731         return 0;
3732 }
3733
3734 static bool
3735 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3736 {
3737         s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3738         int skip;
3739
3740         if (end > 0)
3741                 return false;
3742
3743         /* One shot NOA  */
3744         if (data->count[i] == 1)
3745                 return false;
3746
3747         if (data->desc[i].interval == 0)
3748                 return false;
3749
3750         /* End time is in the past, check for repetitions */
3751         skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3752         if (data->count[i] < 255) {
3753                 if (data->count[i] <= skip) {
3754                         data->count[i] = 0;
3755                         return false;
3756                 }
3757
3758                 data->count[i] -= skip;
3759         }
3760
3761         data->desc[i].start += skip * data->desc[i].interval;
3762
3763         return true;
3764 }
3765
3766 static bool
3767 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3768                              s32 *offset)
3769 {
3770         bool ret = false;
3771         int i;
3772
3773         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3774                 s32 cur;
3775
3776                 if (!data->count[i])
3777                         continue;
3778
3779                 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3780                         ret = true;
3781
3782                 cur = data->desc[i].start - tsf;
3783                 if (cur > *offset)
3784                         continue;
3785
3786                 cur = data->desc[i].start + data->desc[i].duration - tsf;
3787                 if (cur > *offset)
3788                         *offset = cur;
3789         }
3790
3791         return ret;
3792 }
3793
3794 static u32
3795 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3796 {
3797         s32 offset = 0;
3798         int tries = 0;
3799         /*
3800          * arbitrary limit, used to avoid infinite loops when combined NoA
3801          * descriptors cover the full time period.
3802          */
3803         int max_tries = 5;
3804
3805         ieee80211_extend_absent_time(data, tsf, &offset);
3806         do {
3807                 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3808                         break;
3809
3810                 tries++;
3811         } while (tries < max_tries);
3812
3813         return offset;
3814 }
3815
3816 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3817 {
3818         u32 next_offset = BIT(31) - 1;
3819         int i;
3820
3821         data->absent = 0;
3822         data->has_next_tsf = false;
3823         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3824                 s32 start;
3825
3826                 if (!data->count[i])
3827                         continue;
3828
3829                 ieee80211_extend_noa_desc(data, tsf, i);
3830                 start = data->desc[i].start - tsf;
3831                 if (start <= 0)
3832                         data->absent |= BIT(i);
3833
3834                 if (next_offset > start)
3835                         next_offset = start;
3836
3837                 data->has_next_tsf = true;
3838         }
3839
3840         if (data->absent)
3841                 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3842
3843         data->next_tsf = tsf + next_offset;
3844 }
3845 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3846
3847 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3848                             struct ieee80211_noa_data *data, u32 tsf)
3849 {
3850         int ret = 0;
3851         int i;
3852
3853         memset(data, 0, sizeof(*data));
3854
3855         for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3856                 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3857
3858                 if (!desc->count || !desc->duration)
3859                         continue;
3860
3861                 data->count[i] = desc->count;
3862                 data->desc[i].start = le32_to_cpu(desc->start_time);
3863                 data->desc[i].duration = le32_to_cpu(desc->duration);
3864                 data->desc[i].interval = le32_to_cpu(desc->interval);
3865
3866                 if (data->count[i] > 1 &&
3867                     data->desc[i].interval < data->desc[i].duration)
3868                         continue;
3869
3870                 ieee80211_extend_noa_desc(data, tsf, i);
3871                 ret++;
3872         }
3873
3874         if (ret)
3875                 ieee80211_update_p2p_noa(data, tsf);
3876
3877         return ret;
3878 }
3879 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3880
3881 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3882                            struct ieee80211_sub_if_data *sdata)
3883 {
3884         u64 tsf = drv_get_tsf(local, sdata);
3885         u64 dtim_count = 0;
3886         u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3887         u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3888         struct ps_data *ps;
3889         u8 bcns_from_dtim;
3890
3891         if (tsf == -1ULL || !beacon_int || !dtim_period)
3892                 return;
3893
3894         if (sdata->vif.type == NL80211_IFTYPE_AP ||
3895             sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3896                 if (!sdata->bss)
3897                         return;
3898
3899                 ps = &sdata->bss->ps;
3900         } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3901                 ps = &sdata->u.mesh.ps;
3902         } else {
3903                 return;
3904         }
3905
3906         /*
3907          * actually finds last dtim_count, mac80211 will update in
3908          * __beacon_add_tim().
3909          * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3910          */
3911         do_div(tsf, beacon_int);
3912         bcns_from_dtim = do_div(tsf, dtim_period);
3913         /* just had a DTIM */
3914         if (!bcns_from_dtim)
3915                 dtim_count = 0;
3916         else
3917                 dtim_count = dtim_period - bcns_from_dtim;
3918
3919         ps->dtim_count = dtim_count;
3920 }
3921
3922 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3923                                          struct ieee80211_chanctx *ctx)
3924 {
3925         struct ieee80211_link_data *link;
3926         u8 radar_detect = 0;
3927
3928         lockdep_assert_wiphy(local->hw.wiphy);
3929
3930         if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3931                 return 0;
3932
3933         list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
3934                 if (link->reserved_radar_required)
3935                         radar_detect |= BIT(link->reserved.oper.width);
3936
3937         /*
3938          * An in-place reservation context should not have any assigned vifs
3939          * until it replaces the other context.
3940          */
3941         WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3942                 !list_empty(&ctx->assigned_links));
3943
3944         list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) {
3945                 if (!link->radar_required)
3946                         continue;
3947
3948                 radar_detect |=
3949                         BIT(link->conf->chanreq.oper.width);
3950         }
3951
3952         return radar_detect;
3953 }
3954
3955 static u32
3956 __ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata)
3957 {
3958         struct ieee80211_bss_conf *link_conf;
3959         struct ieee80211_chanctx_conf *conf;
3960         unsigned int link_id;
3961         u32 mask = 0;
3962
3963         for_each_vif_active_link(&sdata->vif, link_conf, link_id) {
3964                 conf = sdata_dereference(link_conf->chanctx_conf, sdata);
3965                 if (!conf || conf->radio_idx < 0)
3966                         continue;
3967
3968                 mask |= BIT(conf->radio_idx);
3969         }
3970
3971         return mask;
3972 }
3973
3974 u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev)
3975 {
3976         struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3977
3978         return __ieee80211_get_radio_mask(sdata);
3979 }
3980
3981 static bool
3982 ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx)
3983 {
3984         if (radio_idx < 0)
3985                 return true;
3986
3987         return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx);
3988 }
3989
3990 static int
3991 ieee80211_fill_ifcomb_params(struct ieee80211_local *local,
3992                              struct iface_combination_params *params,
3993                              const struct cfg80211_chan_def *chandef,
3994                              struct ieee80211_sub_if_data *sdata)
3995 {
3996         struct ieee80211_sub_if_data *sdata_iter;
3997         struct ieee80211_chanctx *ctx;
3998         int total = !!sdata;
3999
4000         list_for_each_entry(ctx, &local->chanctx_list, list) {
4001                 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4002                         continue;
4003
4004                 if (params->radio_idx >= 0 &&
4005                     ctx->conf.radio_idx != params->radio_idx)
4006                         continue;
4007
4008                 params->radar_detect |=
4009                         ieee80211_chanctx_radar_detect(local, ctx);
4010
4011                 if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE &&
4012                     cfg80211_chandef_compatible(chandef, &ctx->conf.def))
4013                         continue;
4014
4015                 params->num_different_channels++;
4016         }
4017
4018         list_for_each_entry(sdata_iter, &local->interfaces, list) {
4019                 struct wireless_dev *wdev_iter;
4020
4021                 wdev_iter = &sdata_iter->wdev;
4022
4023                 if (sdata_iter == sdata ||
4024                     !ieee80211_sdata_running(sdata_iter) ||
4025                     cfg80211_iftype_allowed(local->hw.wiphy,
4026                                             wdev_iter->iftype, 0, 1))
4027                         continue;
4028
4029                 if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx))
4030                         continue;
4031
4032                 params->iftype_num[wdev_iter->iftype]++;
4033                 total++;
4034         }
4035
4036         return total;
4037 }
4038
4039 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4040                                  const struct cfg80211_chan_def *chandef,
4041                                  enum ieee80211_chanctx_mode chanmode,
4042                                  u8 radar_detect, int radio_idx)
4043 {
4044         bool shared = chanmode == IEEE80211_CHANCTX_SHARED;
4045         struct ieee80211_local *local = sdata->local;
4046         enum nl80211_iftype iftype = sdata->wdev.iftype;
4047         struct iface_combination_params params = {
4048                 .radar_detect = radar_detect,
4049                 .radio_idx = radio_idx,
4050         };
4051         int total;
4052
4053         lockdep_assert_wiphy(local->hw.wiphy);
4054
4055         if (WARN_ON(hweight32(radar_detect) > 1))
4056                 return -EINVAL;
4057
4058         if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4059                     !chandef->chan))
4060                 return -EINVAL;
4061
4062         if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4063                 return -EINVAL;
4064
4065         if (sdata->vif.type == NL80211_IFTYPE_AP ||
4066             sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4067                 /*
4068                  * always passing this is harmless, since it'll be the
4069                  * same value that cfg80211 finds if it finds the same
4070                  * interface ... and that's always allowed
4071                  */
4072                 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4073         }
4074
4075         /* Always allow software iftypes */
4076         if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4077                 if (radar_detect)
4078                         return -EINVAL;
4079                 return 0;
4080         }
4081
4082         if (chandef)
4083                 params.num_different_channels = 1;
4084
4085         if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4086                 params.iftype_num[iftype] = 1;
4087
4088         total = ieee80211_fill_ifcomb_params(local, &params,
4089                                              shared ? chandef : NULL,
4090                                              sdata);
4091         if (total == 1 && !params.radar_detect)
4092                 return 0;
4093
4094         return cfg80211_check_combinations(local->hw.wiphy, &params);
4095 }
4096
4097 static void
4098 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4099                          void *data)
4100 {
4101         u32 *max_num_different_channels = data;
4102
4103         *max_num_different_channels = max(*max_num_different_channels,
4104                                           c->num_different_channels);
4105 }
4106
4107 int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx)
4108 {
4109         u32 max_num_different_channels = 1;
4110         int err;
4111         struct iface_combination_params params = {
4112                 .radio_idx = radio_idx,
4113         };
4114
4115         lockdep_assert_wiphy(local->hw.wiphy);
4116
4117         ieee80211_fill_ifcomb_params(local, &params, NULL, NULL);
4118
4119         err = cfg80211_iter_combinations(local->hw.wiphy, &params,
4120                                          ieee80211_iter_max_chans,
4121                                          &max_num_different_channels);
4122         if (err < 0)
4123                 return err;
4124
4125         return max_num_different_channels;
4126 }
4127
4128 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4129                                 struct ieee80211_sta_s1g_cap *caps,
4130                                 struct sk_buff *skb)
4131 {
4132         struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4133         struct ieee80211_s1g_cap s1g_capab;
4134         u8 *pos;
4135         int i;
4136
4137         if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4138                 return;
4139
4140         if (!caps->s1g)
4141                 return;
4142
4143         memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4144         memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4145
4146         /* override the capability info */
4147         for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4148                 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4149
4150                 s1g_capab.capab_info[i] &= ~mask;
4151                 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4152         }
4153
4154         /* then MCS and NSS set */
4155         for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4156                 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4157
4158                 s1g_capab.supp_mcs_nss[i] &= ~mask;
4159                 s1g_capab.supp_mcs_nss[i] |=
4160                         ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4161         }
4162
4163         pos = skb_put(skb, 2 + sizeof(s1g_capab));
4164         *pos++ = WLAN_EID_S1G_CAPABILITIES;
4165         *pos++ = sizeof(s1g_capab);
4166
4167         memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4168 }
4169
4170 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4171                                   struct sk_buff *skb)
4172 {
4173         u8 *pos = skb_put(skb, 3);
4174
4175         *pos++ = WLAN_EID_AID_REQUEST;
4176         *pos++ = 1;
4177         *pos++ = 0;
4178 }
4179
4180 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4181 {
4182         *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4183         *buf++ = 7; /* len */
4184         *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4185         *buf++ = 0x50;
4186         *buf++ = 0xf2;
4187         *buf++ = 2; /* WME */
4188         *buf++ = 0; /* WME info */
4189         *buf++ = 1; /* WME ver */
4190         *buf++ = qosinfo; /* U-APSD no in use */
4191
4192         return buf;
4193 }
4194
4195 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4196                              unsigned long *frame_cnt,
4197                              unsigned long *byte_cnt)
4198 {
4199         struct txq_info *txqi = to_txq_info(txq);
4200         u32 frag_cnt = 0, frag_bytes = 0;
4201         struct sk_buff *skb;
4202
4203         skb_queue_walk(&txqi->frags, skb) {
4204                 frag_cnt++;
4205                 frag_bytes += skb->len;
4206         }
4207
4208         if (frame_cnt)
4209                 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4210
4211         if (byte_cnt)
4212                 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4213 }
4214 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4215
4216 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4217         IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4218         IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4219         IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4220         IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4221 };
4222
4223 u16 ieee80211_encode_usf(int listen_interval)
4224 {
4225         static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4226         u16 ui, usf = 0;
4227
4228         /* find greatest USF */
4229         while (usf < IEEE80211_MAX_USF) {
4230                 if (listen_interval % listen_int_usf[usf + 1])
4231                         break;
4232                 usf += 1;
4233         }
4234         ui = listen_interval / listen_int_usf[usf];
4235
4236         /* error if there is a remainder. Should've been checked by user */
4237         WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4238         listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4239                           FIELD_PREP(LISTEN_INT_UI, ui);
4240
4241         return (u16) listen_interval;
4242 }
4243
4244 /* this may return more than ieee80211_put_eht_cap() will need */
4245 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata)
4246 {
4247         const struct ieee80211_sta_he_cap *he_cap;
4248         const struct ieee80211_sta_eht_cap *eht_cap;
4249         struct ieee80211_supported_band *sband;
4250         bool is_ap;
4251         u8 n;
4252
4253         sband = ieee80211_get_sband(sdata);
4254         if (!sband)
4255                 return 0;
4256
4257         he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4258         eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4259         if (!he_cap || !eht_cap)
4260                 return 0;
4261
4262         is_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4263
4264         n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4265                                        &eht_cap->eht_cap_elem,
4266                                        is_ap);
4267         return 2 + 1 +
4268                sizeof(eht_cap->eht_cap_elem) + n +
4269                ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4270                                       eht_cap->eht_cap_elem.phy_cap_info);
4271         return 0;
4272 }
4273
4274 int ieee80211_put_eht_cap(struct sk_buff *skb,
4275                           struct ieee80211_sub_if_data *sdata,
4276                           const struct ieee80211_supported_band *sband,
4277                           const struct ieee80211_conn_settings *conn)
4278 {
4279         const struct ieee80211_sta_he_cap *he_cap =
4280                 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
4281         const struct ieee80211_sta_eht_cap *eht_cap =
4282                 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
4283         bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP;
4284         struct ieee80211_eht_cap_elem_fixed fixed;
4285         struct ieee80211_he_cap_elem he;
4286         u8 mcs_nss_len, ppet_len;
4287         u8 orig_mcs_nss_len;
4288         u8 ie_len;
4289
4290         if (!conn)
4291                 conn = &ieee80211_conn_settings_unlimited;
4292
4293         /* Make sure we have place for the IE */
4294         if (!he_cap || !eht_cap)
4295                 return 0;
4296
4297         orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
4298                                                       &eht_cap->eht_cap_elem,
4299                                                       for_ap);
4300
4301         ieee80211_get_adjusted_he_cap(conn, he_cap, &he);
4302
4303         fixed = eht_cap->eht_cap_elem;
4304
4305         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80)
4306                 fixed.phy_cap_info[6] &=
4307                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ;
4308
4309         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) {
4310                 fixed.phy_cap_info[1] &=
4311                         ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK;
4312                 fixed.phy_cap_info[2] &=
4313                         ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK;
4314                 fixed.phy_cap_info[6] &=
4315                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ;
4316         }
4317
4318         if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) {
4319                 fixed.phy_cap_info[0] &=
4320                         ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ;
4321                 fixed.phy_cap_info[1] &=
4322                         ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK;
4323                 fixed.phy_cap_info[2] &=
4324                         ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK;
4325                 fixed.phy_cap_info[6] &=
4326                         ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ;
4327         }
4328
4329         if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20)
4330                 fixed.phy_cap_info[0] &=
4331                         ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ;
4332
4333         mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap);
4334         ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0],
4335                                           fixed.phy_cap_info);
4336
4337         ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len;
4338         if (skb_tailroom(skb) < ie_len)
4339                 return -ENOBUFS;
4340
4341         skb_put_u8(skb, WLAN_EID_EXTENSION);
4342         skb_put_u8(skb, ie_len - 2);
4343         skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY);
4344         skb_put_data(skb, &fixed, sizeof(fixed));
4345
4346         if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) {
4347                 /*
4348                  * If the (non-AP) STA became 20 MHz only, then convert from
4349                  * <=80 to 20-MHz-only format, where MCSes are indicated in
4350                  * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9,
4351                  * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9.
4352                  */
4353                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4354                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss);
4355                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss);
4356                 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss);
4357         } else {
4358                 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len);
4359         }
4360
4361         if (ppet_len)
4362                 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len);
4363
4364         return 0;
4365 }
4366
4367 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode)
4368 {
4369         static const char * const modes[] = {
4370                 [IEEE80211_CONN_MODE_S1G] = "S1G",
4371                 [IEEE80211_CONN_MODE_LEGACY] = "legacy",
4372                 [IEEE80211_CONN_MODE_HT] = "HT",
4373                 [IEEE80211_CONN_MODE_VHT] = "VHT",
4374                 [IEEE80211_CONN_MODE_HE] = "HE",
4375                 [IEEE80211_CONN_MODE_EHT] = "EHT",
4376         };
4377
4378         if (WARN_ON(mode >= ARRAY_SIZE(modes)))
4379                 return "<out of range>";
4380
4381         return modes[mode] ?: "<missing string>";
4382 }
4383
4384 enum ieee80211_conn_bw_limit
4385 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef)
4386 {
4387         switch (chandef->width) {
4388         case NL80211_CHAN_WIDTH_20_NOHT:
4389         case NL80211_CHAN_WIDTH_20:
4390                 return IEEE80211_CONN_BW_LIMIT_20;
4391         case NL80211_CHAN_WIDTH_40:
4392                 return IEEE80211_CONN_BW_LIMIT_40;
4393         case NL80211_CHAN_WIDTH_80:
4394                 return IEEE80211_CONN_BW_LIMIT_80;
4395         case NL80211_CHAN_WIDTH_80P80:
4396         case NL80211_CHAN_WIDTH_160:
4397                 return IEEE80211_CONN_BW_LIMIT_160;
4398         case NL80211_CHAN_WIDTH_320:
4399                 return IEEE80211_CONN_BW_LIMIT_320;
4400         default:
4401                 WARN(1, "unhandled chandef width %d\n", chandef->width);
4402                 return IEEE80211_CONN_BW_LIMIT_20;
4403         }
4404 }
4405
4406 void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe)
4407 {
4408         for (int i = 0; i < 2; i++) {
4409                 tpe->max_local[i].valid = false;
4410                 memset(tpe->max_local[i].power,
4411                        IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
4412                        sizeof(tpe->max_local[i].power));
4413
4414                 tpe->max_reg_client[i].valid = false;
4415                 memset(tpe->max_reg_client[i].power,
4416                        IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT,
4417                        sizeof(tpe->max_reg_client[i].power));
4418
4419                 tpe->psd_local[i].valid = false;
4420                 memset(tpe->psd_local[i].power,
4421                        IEEE80211_TPE_PSD_NO_LIMIT,
4422                        sizeof(tpe->psd_local[i].power));
4423
4424                 tpe->psd_reg_client[i].valid = false;
4425                 memset(tpe->psd_reg_client[i].power,
4426                        IEEE80211_TPE_PSD_NO_LIMIT,
4427                        sizeof(tpe->psd_reg_client[i].power));
4428         }
4429 }