1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015-2017 Intel Deutschland GmbH 9 * Copyright (C) 2018-2021 Intel Corporation 10 * 11 * utilities for mac80211 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/netdevice.h> 16 #include <linux/export.h> 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/skbuff.h> 20 #include <linux/etherdevice.h> 21 #include <linux/if_arp.h> 22 #include <linux/bitmap.h> 23 #include <linux/crc32.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/rtnetlink.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wme.h" 33 #include "led.h" 34 #include "wep.h" 35 36 /* privid for wiphys to determine whether they belong to us or not */ 37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 38 39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 40 { 41 struct ieee80211_local *local; 42 43 local = wiphy_priv(wiphy); 44 return &local->hw; 45 } 46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 47 48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 49 enum nl80211_iftype type) 50 { 51 __le16 fc = hdr->frame_control; 52 53 if (ieee80211_is_data(fc)) { 54 if (len < 24) /* drop incorrect hdr len (data) */ 55 return NULL; 56 57 if (ieee80211_has_a4(fc)) 58 return NULL; 59 if (ieee80211_has_tods(fc)) 60 return hdr->addr1; 61 if (ieee80211_has_fromds(fc)) 62 return hdr->addr2; 63 64 return hdr->addr3; 65 } 66 67 if (ieee80211_is_s1g_beacon(fc)) { 68 struct ieee80211_ext *ext = (void *) hdr; 69 70 return ext->u.s1g_beacon.sa; 71 } 72 73 if (ieee80211_is_mgmt(fc)) { 74 if (len < 24) /* drop incorrect hdr len (mgmt) */ 75 return NULL; 76 return hdr->addr3; 77 } 78 79 if (ieee80211_is_ctl(fc)) { 80 if (ieee80211_is_pspoll(fc)) 81 return hdr->addr1; 82 83 if (ieee80211_is_back_req(fc)) { 84 switch (type) { 85 case NL80211_IFTYPE_STATION: 86 return hdr->addr2; 87 case NL80211_IFTYPE_AP: 88 case NL80211_IFTYPE_AP_VLAN: 89 return hdr->addr1; 90 default: 91 break; /* fall through to the return */ 92 } 93 } 94 } 95 96 return NULL; 97 } 98 EXPORT_SYMBOL(ieee80211_get_bssid); 99 100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 101 { 102 struct sk_buff *skb; 103 struct ieee80211_hdr *hdr; 104 105 skb_queue_walk(&tx->skbs, skb) { 106 hdr = (struct ieee80211_hdr *) skb->data; 107 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 108 } 109 } 110 111 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 112 int rate, int erp, int short_preamble, 113 int shift) 114 { 115 int dur; 116 117 /* calculate duration (in microseconds, rounded up to next higher 118 * integer if it includes a fractional microsecond) to send frame of 119 * len bytes (does not include FCS) at the given rate. Duration will 120 * also include SIFS. 121 * 122 * rate is in 100 kbps, so divident is multiplied by 10 in the 123 * DIV_ROUND_UP() operations. 124 * 125 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 126 * is assumed to be 0 otherwise. 127 */ 128 129 if (band == NL80211_BAND_5GHZ || erp) { 130 /* 131 * OFDM: 132 * 133 * N_DBPS = DATARATE x 4 134 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 135 * (16 = SIGNAL time, 6 = tail bits) 136 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 137 * 138 * T_SYM = 4 usec 139 * 802.11a - 18.5.2: aSIFSTime = 16 usec 140 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 141 * signal ext = 6 usec 142 */ 143 dur = 16; /* SIFS + signal ext */ 144 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 145 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 146 147 /* IEEE 802.11-2012 18.3.2.4: all values above are: 148 * * times 4 for 5 MHz 149 * * times 2 for 10 MHz 150 */ 151 dur *= 1 << shift; 152 153 /* rates should already consider the channel bandwidth, 154 * don't apply divisor again. 155 */ 156 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 157 4 * rate); /* T_SYM x N_SYM */ 158 } else { 159 /* 160 * 802.11b or 802.11g with 802.11b compatibility: 161 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 162 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 163 * 164 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 165 * aSIFSTime = 10 usec 166 * aPreambleLength = 144 usec or 72 usec with short preamble 167 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 168 */ 169 dur = 10; /* aSIFSTime = 10 usec */ 170 dur += short_preamble ? (72 + 24) : (144 + 48); 171 172 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 173 } 174 175 return dur; 176 } 177 178 /* Exported duration function for driver use */ 179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 180 struct ieee80211_vif *vif, 181 enum nl80211_band band, 182 size_t frame_len, 183 struct ieee80211_rate *rate) 184 { 185 struct ieee80211_sub_if_data *sdata; 186 u16 dur; 187 int erp, shift = 0; 188 bool short_preamble = false; 189 190 erp = 0; 191 if (vif) { 192 sdata = vif_to_sdata(vif); 193 short_preamble = sdata->vif.bss_conf.use_short_preamble; 194 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 195 erp = rate->flags & IEEE80211_RATE_ERP_G; 196 shift = ieee80211_vif_get_shift(vif); 197 } 198 199 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 200 short_preamble, shift); 201 202 return cpu_to_le16(dur); 203 } 204 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 205 206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 207 struct ieee80211_vif *vif, size_t frame_len, 208 const struct ieee80211_tx_info *frame_txctl) 209 { 210 struct ieee80211_local *local = hw_to_local(hw); 211 struct ieee80211_rate *rate; 212 struct ieee80211_sub_if_data *sdata; 213 bool short_preamble; 214 int erp, shift = 0, bitrate; 215 u16 dur; 216 struct ieee80211_supported_band *sband; 217 218 sband = local->hw.wiphy->bands[frame_txctl->band]; 219 220 short_preamble = false; 221 222 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 223 224 erp = 0; 225 if (vif) { 226 sdata = vif_to_sdata(vif); 227 short_preamble = sdata->vif.bss_conf.use_short_preamble; 228 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 229 erp = rate->flags & IEEE80211_RATE_ERP_G; 230 shift = ieee80211_vif_get_shift(vif); 231 } 232 233 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 234 235 /* CTS duration */ 236 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 237 erp, short_preamble, shift); 238 /* Data frame duration */ 239 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 240 erp, short_preamble, shift); 241 /* ACK duration */ 242 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 243 erp, short_preamble, shift); 244 245 return cpu_to_le16(dur); 246 } 247 EXPORT_SYMBOL(ieee80211_rts_duration); 248 249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 250 struct ieee80211_vif *vif, 251 size_t frame_len, 252 const struct ieee80211_tx_info *frame_txctl) 253 { 254 struct ieee80211_local *local = hw_to_local(hw); 255 struct ieee80211_rate *rate; 256 struct ieee80211_sub_if_data *sdata; 257 bool short_preamble; 258 int erp, shift = 0, bitrate; 259 u16 dur; 260 struct ieee80211_supported_band *sband; 261 262 sband = local->hw.wiphy->bands[frame_txctl->band]; 263 264 short_preamble = false; 265 266 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 267 erp = 0; 268 if (vif) { 269 sdata = vif_to_sdata(vif); 270 short_preamble = sdata->vif.bss_conf.use_short_preamble; 271 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 272 erp = rate->flags & IEEE80211_RATE_ERP_G; 273 shift = ieee80211_vif_get_shift(vif); 274 } 275 276 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 277 278 /* Data frame duration */ 279 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 280 erp, short_preamble, shift); 281 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 282 /* ACK duration */ 283 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 284 erp, short_preamble, shift); 285 } 286 287 return cpu_to_le16(dur); 288 } 289 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 290 291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 292 { 293 struct ieee80211_local *local = sdata->local; 294 struct ieee80211_vif *vif = &sdata->vif; 295 struct fq *fq = &local->fq; 296 struct ps_data *ps = NULL; 297 struct txq_info *txqi; 298 struct sta_info *sta; 299 int i; 300 301 local_bh_disable(); 302 spin_lock(&fq->lock); 303 304 if (sdata->vif.type == NL80211_IFTYPE_AP) 305 ps = &sdata->bss->ps; 306 307 sdata->vif.txqs_stopped[ac] = false; 308 309 list_for_each_entry_rcu(sta, &local->sta_list, list) { 310 if (sdata != sta->sdata) 311 continue; 312 313 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 314 struct ieee80211_txq *txq = sta->sta.txq[i]; 315 316 if (!txq) 317 continue; 318 319 txqi = to_txq_info(txq); 320 321 if (ac != txq->ac) 322 continue; 323 324 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 325 &txqi->flags)) 326 continue; 327 328 spin_unlock(&fq->lock); 329 drv_wake_tx_queue(local, txqi); 330 spin_lock(&fq->lock); 331 } 332 } 333 334 if (!vif->txq) 335 goto out; 336 337 txqi = to_txq_info(vif->txq); 338 339 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 340 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 341 goto out; 342 343 spin_unlock(&fq->lock); 344 345 drv_wake_tx_queue(local, txqi); 346 local_bh_enable(); 347 return; 348 out: 349 spin_unlock(&fq->lock); 350 local_bh_enable(); 351 } 352 353 static void 354 __releases(&local->queue_stop_reason_lock) 355 __acquires(&local->queue_stop_reason_lock) 356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 357 { 358 struct ieee80211_sub_if_data *sdata; 359 int n_acs = IEEE80211_NUM_ACS; 360 int i; 361 362 rcu_read_lock(); 363 364 if (local->hw.queues < IEEE80211_NUM_ACS) 365 n_acs = 1; 366 367 for (i = 0; i < local->hw.queues; i++) { 368 if (local->queue_stop_reasons[i]) 369 continue; 370 371 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 372 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 373 int ac; 374 375 for (ac = 0; ac < n_acs; ac++) { 376 int ac_queue = sdata->vif.hw_queue[ac]; 377 378 if (ac_queue == i || 379 sdata->vif.cab_queue == i) 380 __ieee80211_wake_txqs(sdata, ac); 381 } 382 } 383 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 384 } 385 386 rcu_read_unlock(); 387 } 388 389 void ieee80211_wake_txqs(struct tasklet_struct *t) 390 { 391 struct ieee80211_local *local = from_tasklet(local, t, 392 wake_txqs_tasklet); 393 unsigned long flags; 394 395 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 396 _ieee80211_wake_txqs(local, &flags); 397 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 398 } 399 400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 401 { 402 struct ieee80211_sub_if_data *sdata; 403 int n_acs = IEEE80211_NUM_ACS; 404 405 if (local->ops->wake_tx_queue) 406 return; 407 408 if (local->hw.queues < IEEE80211_NUM_ACS) 409 n_acs = 1; 410 411 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 412 int ac; 413 414 if (!sdata->dev) 415 continue; 416 417 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 418 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 419 continue; 420 421 for (ac = 0; ac < n_acs; ac++) { 422 int ac_queue = sdata->vif.hw_queue[ac]; 423 424 if (ac_queue == queue || 425 (sdata->vif.cab_queue == queue && 426 local->queue_stop_reasons[ac_queue] == 0 && 427 skb_queue_empty(&local->pending[ac_queue]))) 428 netif_wake_subqueue(sdata->dev, ac); 429 } 430 } 431 } 432 433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 434 enum queue_stop_reason reason, 435 bool refcounted, 436 unsigned long *flags) 437 { 438 struct ieee80211_local *local = hw_to_local(hw); 439 440 trace_wake_queue(local, queue, reason); 441 442 if (WARN_ON(queue >= hw->queues)) 443 return; 444 445 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 446 return; 447 448 if (!refcounted) { 449 local->q_stop_reasons[queue][reason] = 0; 450 } else { 451 local->q_stop_reasons[queue][reason]--; 452 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 453 local->q_stop_reasons[queue][reason] = 0; 454 } 455 456 if (local->q_stop_reasons[queue][reason] == 0) 457 __clear_bit(reason, &local->queue_stop_reasons[queue]); 458 459 if (local->queue_stop_reasons[queue] != 0) 460 /* someone still has this queue stopped */ 461 return; 462 463 if (skb_queue_empty(&local->pending[queue])) { 464 rcu_read_lock(); 465 ieee80211_propagate_queue_wake(local, queue); 466 rcu_read_unlock(); 467 } else 468 tasklet_schedule(&local->tx_pending_tasklet); 469 470 /* 471 * Calling _ieee80211_wake_txqs here can be a problem because it may 472 * release queue_stop_reason_lock which has been taken by 473 * __ieee80211_wake_queue's caller. It is certainly not very nice to 474 * release someone's lock, but it is fine because all the callers of 475 * __ieee80211_wake_queue call it right before releasing the lock. 476 */ 477 if (local->ops->wake_tx_queue) { 478 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 479 tasklet_schedule(&local->wake_txqs_tasklet); 480 else 481 _ieee80211_wake_txqs(local, flags); 482 } 483 } 484 485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 486 enum queue_stop_reason reason, 487 bool refcounted) 488 { 489 struct ieee80211_local *local = hw_to_local(hw); 490 unsigned long flags; 491 492 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 493 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 494 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 495 } 496 497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 498 { 499 ieee80211_wake_queue_by_reason(hw, queue, 500 IEEE80211_QUEUE_STOP_REASON_DRIVER, 501 false); 502 } 503 EXPORT_SYMBOL(ieee80211_wake_queue); 504 505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 506 enum queue_stop_reason reason, 507 bool refcounted) 508 { 509 struct ieee80211_local *local = hw_to_local(hw); 510 struct ieee80211_sub_if_data *sdata; 511 int n_acs = IEEE80211_NUM_ACS; 512 513 trace_stop_queue(local, queue, reason); 514 515 if (WARN_ON(queue >= hw->queues)) 516 return; 517 518 if (!refcounted) 519 local->q_stop_reasons[queue][reason] = 1; 520 else 521 local->q_stop_reasons[queue][reason]++; 522 523 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 524 return; 525 526 if (local->hw.queues < IEEE80211_NUM_ACS) 527 n_acs = 1; 528 529 rcu_read_lock(); 530 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 531 int ac; 532 533 if (!sdata->dev) 534 continue; 535 536 for (ac = 0; ac < n_acs; ac++) { 537 if (sdata->vif.hw_queue[ac] == queue || 538 sdata->vif.cab_queue == queue) { 539 if (!local->ops->wake_tx_queue) { 540 netif_stop_subqueue(sdata->dev, ac); 541 continue; 542 } 543 spin_lock(&local->fq.lock); 544 sdata->vif.txqs_stopped[ac] = true; 545 spin_unlock(&local->fq.lock); 546 } 547 } 548 } 549 rcu_read_unlock(); 550 } 551 552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 553 enum queue_stop_reason reason, 554 bool refcounted) 555 { 556 struct ieee80211_local *local = hw_to_local(hw); 557 unsigned long flags; 558 559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 560 __ieee80211_stop_queue(hw, queue, reason, refcounted); 561 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 562 } 563 564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 565 { 566 ieee80211_stop_queue_by_reason(hw, queue, 567 IEEE80211_QUEUE_STOP_REASON_DRIVER, 568 false); 569 } 570 EXPORT_SYMBOL(ieee80211_stop_queue); 571 572 void ieee80211_add_pending_skb(struct ieee80211_local *local, 573 struct sk_buff *skb) 574 { 575 struct ieee80211_hw *hw = &local->hw; 576 unsigned long flags; 577 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 578 int queue = info->hw_queue; 579 580 if (WARN_ON(!info->control.vif)) { 581 ieee80211_free_txskb(&local->hw, skb); 582 return; 583 } 584 585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 586 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 587 false); 588 __skb_queue_tail(&local->pending[queue], skb); 589 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 590 false, &flags); 591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 592 } 593 594 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 595 struct sk_buff_head *skbs) 596 { 597 struct ieee80211_hw *hw = &local->hw; 598 struct sk_buff *skb; 599 unsigned long flags; 600 int queue, i; 601 602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 603 while ((skb = skb_dequeue(skbs))) { 604 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 605 606 if (WARN_ON(!info->control.vif)) { 607 ieee80211_free_txskb(&local->hw, skb); 608 continue; 609 } 610 611 queue = info->hw_queue; 612 613 __ieee80211_stop_queue(hw, queue, 614 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 615 false); 616 617 __skb_queue_tail(&local->pending[queue], skb); 618 } 619 620 for (i = 0; i < hw->queues; i++) 621 __ieee80211_wake_queue(hw, i, 622 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 623 false, &flags); 624 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 625 } 626 627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 628 unsigned long queues, 629 enum queue_stop_reason reason, 630 bool refcounted) 631 { 632 struct ieee80211_local *local = hw_to_local(hw); 633 unsigned long flags; 634 int i; 635 636 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 637 638 for_each_set_bit(i, &queues, hw->queues) 639 __ieee80211_stop_queue(hw, i, reason, refcounted); 640 641 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 642 } 643 644 void ieee80211_stop_queues(struct ieee80211_hw *hw) 645 { 646 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 647 IEEE80211_QUEUE_STOP_REASON_DRIVER, 648 false); 649 } 650 EXPORT_SYMBOL(ieee80211_stop_queues); 651 652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 653 { 654 struct ieee80211_local *local = hw_to_local(hw); 655 unsigned long flags; 656 int ret; 657 658 if (WARN_ON(queue >= hw->queues)) 659 return true; 660 661 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 662 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 663 &local->queue_stop_reasons[queue]); 664 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 665 return ret; 666 } 667 EXPORT_SYMBOL(ieee80211_queue_stopped); 668 669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 670 unsigned long queues, 671 enum queue_stop_reason reason, 672 bool refcounted) 673 { 674 struct ieee80211_local *local = hw_to_local(hw); 675 unsigned long flags; 676 int i; 677 678 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 679 680 for_each_set_bit(i, &queues, hw->queues) 681 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 682 683 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 684 } 685 686 void ieee80211_wake_queues(struct ieee80211_hw *hw) 687 { 688 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 689 IEEE80211_QUEUE_STOP_REASON_DRIVER, 690 false); 691 } 692 EXPORT_SYMBOL(ieee80211_wake_queues); 693 694 static unsigned int 695 ieee80211_get_vif_queues(struct ieee80211_local *local, 696 struct ieee80211_sub_if_data *sdata) 697 { 698 unsigned int queues; 699 700 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 701 int ac; 702 703 queues = 0; 704 705 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 706 queues |= BIT(sdata->vif.hw_queue[ac]); 707 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 708 queues |= BIT(sdata->vif.cab_queue); 709 } else { 710 /* all queues */ 711 queues = BIT(local->hw.queues) - 1; 712 } 713 714 return queues; 715 } 716 717 void __ieee80211_flush_queues(struct ieee80211_local *local, 718 struct ieee80211_sub_if_data *sdata, 719 unsigned int queues, bool drop) 720 { 721 if (!local->ops->flush) 722 return; 723 724 /* 725 * If no queue was set, or if the HW doesn't support 726 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 727 */ 728 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 729 queues = ieee80211_get_vif_queues(local, sdata); 730 731 ieee80211_stop_queues_by_reason(&local->hw, queues, 732 IEEE80211_QUEUE_STOP_REASON_FLUSH, 733 false); 734 735 drv_flush(local, sdata, queues, drop); 736 737 ieee80211_wake_queues_by_reason(&local->hw, queues, 738 IEEE80211_QUEUE_STOP_REASON_FLUSH, 739 false); 740 } 741 742 void ieee80211_flush_queues(struct ieee80211_local *local, 743 struct ieee80211_sub_if_data *sdata, bool drop) 744 { 745 __ieee80211_flush_queues(local, sdata, 0, drop); 746 } 747 748 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 749 struct ieee80211_sub_if_data *sdata, 750 enum queue_stop_reason reason) 751 { 752 ieee80211_stop_queues_by_reason(&local->hw, 753 ieee80211_get_vif_queues(local, sdata), 754 reason, true); 755 } 756 757 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 758 struct ieee80211_sub_if_data *sdata, 759 enum queue_stop_reason reason) 760 { 761 ieee80211_wake_queues_by_reason(&local->hw, 762 ieee80211_get_vif_queues(local, sdata), 763 reason, true); 764 } 765 766 static void __iterate_interfaces(struct ieee80211_local *local, 767 u32 iter_flags, 768 void (*iterator)(void *data, u8 *mac, 769 struct ieee80211_vif *vif), 770 void *data) 771 { 772 struct ieee80211_sub_if_data *sdata; 773 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 774 775 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 776 switch (sdata->vif.type) { 777 case NL80211_IFTYPE_MONITOR: 778 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 779 continue; 780 break; 781 case NL80211_IFTYPE_AP_VLAN: 782 continue; 783 default: 784 break; 785 } 786 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 787 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 788 continue; 789 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 790 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 791 continue; 792 if (ieee80211_sdata_running(sdata) || !active_only) 793 iterator(data, sdata->vif.addr, 794 &sdata->vif); 795 } 796 797 sdata = rcu_dereference_check(local->monitor_sdata, 798 lockdep_is_held(&local->iflist_mtx) || 799 lockdep_is_held(&local->hw.wiphy->mtx)); 800 if (sdata && 801 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 802 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 803 iterator(data, sdata->vif.addr, &sdata->vif); 804 } 805 806 void ieee80211_iterate_interfaces( 807 struct ieee80211_hw *hw, u32 iter_flags, 808 void (*iterator)(void *data, u8 *mac, 809 struct ieee80211_vif *vif), 810 void *data) 811 { 812 struct ieee80211_local *local = hw_to_local(hw); 813 814 mutex_lock(&local->iflist_mtx); 815 __iterate_interfaces(local, iter_flags, iterator, data); 816 mutex_unlock(&local->iflist_mtx); 817 } 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 819 820 void ieee80211_iterate_active_interfaces_atomic( 821 struct ieee80211_hw *hw, u32 iter_flags, 822 void (*iterator)(void *data, u8 *mac, 823 struct ieee80211_vif *vif), 824 void *data) 825 { 826 struct ieee80211_local *local = hw_to_local(hw); 827 828 rcu_read_lock(); 829 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 830 iterator, data); 831 rcu_read_unlock(); 832 } 833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 834 835 void ieee80211_iterate_active_interfaces_mtx( 836 struct ieee80211_hw *hw, u32 iter_flags, 837 void (*iterator)(void *data, u8 *mac, 838 struct ieee80211_vif *vif), 839 void *data) 840 { 841 struct ieee80211_local *local = hw_to_local(hw); 842 843 lockdep_assert_wiphy(hw->wiphy); 844 845 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 846 iterator, data); 847 } 848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx); 849 850 static void __iterate_stations(struct ieee80211_local *local, 851 void (*iterator)(void *data, 852 struct ieee80211_sta *sta), 853 void *data) 854 { 855 struct sta_info *sta; 856 857 list_for_each_entry_rcu(sta, &local->sta_list, list) { 858 if (!sta->uploaded) 859 continue; 860 861 iterator(data, &sta->sta); 862 } 863 } 864 865 void ieee80211_iterate_stations(struct ieee80211_hw *hw, 866 void (*iterator)(void *data, 867 struct ieee80211_sta *sta), 868 void *data) 869 { 870 struct ieee80211_local *local = hw_to_local(hw); 871 872 mutex_lock(&local->sta_mtx); 873 __iterate_stations(local, iterator, data); 874 mutex_unlock(&local->sta_mtx); 875 } 876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations); 877 878 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 879 void (*iterator)(void *data, 880 struct ieee80211_sta *sta), 881 void *data) 882 { 883 struct ieee80211_local *local = hw_to_local(hw); 884 885 rcu_read_lock(); 886 __iterate_stations(local, iterator, data); 887 rcu_read_unlock(); 888 } 889 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 890 891 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 892 { 893 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 894 895 if (!ieee80211_sdata_running(sdata) || 896 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 897 return NULL; 898 return &sdata->vif; 899 } 900 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 901 902 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 903 { 904 if (!vif) 905 return NULL; 906 907 return &vif_to_sdata(vif)->wdev; 908 } 909 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 910 911 /* 912 * Nothing should have been stuffed into the workqueue during 913 * the suspend->resume cycle. Since we can't check each caller 914 * of this function if we are already quiescing / suspended, 915 * check here and don't WARN since this can actually happen when 916 * the rx path (for example) is racing against __ieee80211_suspend 917 * and suspending / quiescing was set after the rx path checked 918 * them. 919 */ 920 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 921 { 922 if (local->quiescing || (local->suspended && !local->resuming)) { 923 pr_warn("queueing ieee80211 work while going to suspend\n"); 924 return false; 925 } 926 927 return true; 928 } 929 930 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 931 { 932 struct ieee80211_local *local = hw_to_local(hw); 933 934 if (!ieee80211_can_queue_work(local)) 935 return; 936 937 queue_work(local->workqueue, work); 938 } 939 EXPORT_SYMBOL(ieee80211_queue_work); 940 941 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 942 struct delayed_work *dwork, 943 unsigned long delay) 944 { 945 struct ieee80211_local *local = hw_to_local(hw); 946 947 if (!ieee80211_can_queue_work(local)) 948 return; 949 950 queue_delayed_work(local->workqueue, dwork, delay); 951 } 952 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 953 954 static void ieee80211_parse_extension_element(u32 *crc, 955 const struct element *elem, 956 struct ieee802_11_elems *elems) 957 { 958 const void *data = elem->data + 1; 959 u8 len; 960 961 if (!elem->datalen) 962 return; 963 964 len = elem->datalen - 1; 965 966 switch (elem->data[0]) { 967 case WLAN_EID_EXT_HE_MU_EDCA: 968 if (len >= sizeof(*elems->mu_edca_param_set)) { 969 elems->mu_edca_param_set = data; 970 if (crc) 971 *crc = crc32_be(*crc, (void *)elem, 972 elem->datalen + 2); 973 } 974 break; 975 case WLAN_EID_EXT_HE_CAPABILITY: 976 elems->he_cap = data; 977 elems->he_cap_len = len; 978 break; 979 case WLAN_EID_EXT_HE_OPERATION: 980 if (len >= sizeof(*elems->he_operation) && 981 len >= ieee80211_he_oper_size(data) - 1) { 982 if (crc) 983 *crc = crc32_be(*crc, (void *)elem, 984 elem->datalen + 2); 985 elems->he_operation = data; 986 } 987 break; 988 case WLAN_EID_EXT_UORA: 989 if (len >= 1) 990 elems->uora_element = data; 991 break; 992 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 993 if (len == 3) 994 elems->max_channel_switch_time = data; 995 break; 996 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 997 if (len >= sizeof(*elems->mbssid_config_ie)) 998 elems->mbssid_config_ie = data; 999 break; 1000 case WLAN_EID_EXT_HE_SPR: 1001 if (len >= sizeof(*elems->he_spr) && 1002 len >= ieee80211_he_spr_size(data)) 1003 elems->he_spr = data; 1004 break; 1005 case WLAN_EID_EXT_HE_6GHZ_CAPA: 1006 if (len >= sizeof(*elems->he_6ghz_capa)) 1007 elems->he_6ghz_capa = data; 1008 break; 1009 } 1010 } 1011 1012 static u32 1013 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 1014 struct ieee802_11_elems *elems, 1015 u64 filter, u32 crc, 1016 const struct element *check_inherit) 1017 { 1018 const struct element *elem; 1019 bool calc_crc = filter != 0; 1020 DECLARE_BITMAP(seen_elems, 256); 1021 const u8 *ie; 1022 1023 bitmap_zero(seen_elems, 256); 1024 1025 for_each_element(elem, start, len) { 1026 bool elem_parse_failed; 1027 u8 id = elem->id; 1028 u8 elen = elem->datalen; 1029 const u8 *pos = elem->data; 1030 1031 if (check_inherit && 1032 !cfg80211_is_element_inherited(elem, 1033 check_inherit)) 1034 continue; 1035 1036 switch (id) { 1037 case WLAN_EID_SSID: 1038 case WLAN_EID_SUPP_RATES: 1039 case WLAN_EID_FH_PARAMS: 1040 case WLAN_EID_DS_PARAMS: 1041 case WLAN_EID_CF_PARAMS: 1042 case WLAN_EID_TIM: 1043 case WLAN_EID_IBSS_PARAMS: 1044 case WLAN_EID_CHALLENGE: 1045 case WLAN_EID_RSN: 1046 case WLAN_EID_ERP_INFO: 1047 case WLAN_EID_EXT_SUPP_RATES: 1048 case WLAN_EID_HT_CAPABILITY: 1049 case WLAN_EID_HT_OPERATION: 1050 case WLAN_EID_VHT_CAPABILITY: 1051 case WLAN_EID_VHT_OPERATION: 1052 case WLAN_EID_MESH_ID: 1053 case WLAN_EID_MESH_CONFIG: 1054 case WLAN_EID_PEER_MGMT: 1055 case WLAN_EID_PREQ: 1056 case WLAN_EID_PREP: 1057 case WLAN_EID_PERR: 1058 case WLAN_EID_RANN: 1059 case WLAN_EID_CHANNEL_SWITCH: 1060 case WLAN_EID_EXT_CHANSWITCH_ANN: 1061 case WLAN_EID_COUNTRY: 1062 case WLAN_EID_PWR_CONSTRAINT: 1063 case WLAN_EID_TIMEOUT_INTERVAL: 1064 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1065 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1066 case WLAN_EID_CHAN_SWITCH_PARAM: 1067 case WLAN_EID_EXT_CAPABILITY: 1068 case WLAN_EID_CHAN_SWITCH_TIMING: 1069 case WLAN_EID_LINK_ID: 1070 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1071 case WLAN_EID_RSNX: 1072 case WLAN_EID_S1G_BCN_COMPAT: 1073 case WLAN_EID_S1G_CAPABILITIES: 1074 case WLAN_EID_S1G_OPERATION: 1075 case WLAN_EID_AID_RESPONSE: 1076 case WLAN_EID_S1G_SHORT_BCN_INTERVAL: 1077 /* 1078 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1079 * that if the content gets bigger it might be needed more than once 1080 */ 1081 if (test_bit(id, seen_elems)) { 1082 elems->parse_error = true; 1083 continue; 1084 } 1085 break; 1086 } 1087 1088 if (calc_crc && id < 64 && (filter & (1ULL << id))) 1089 crc = crc32_be(crc, pos - 2, elen + 2); 1090 1091 elem_parse_failed = false; 1092 1093 switch (id) { 1094 case WLAN_EID_LINK_ID: 1095 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) { 1096 elem_parse_failed = true; 1097 break; 1098 } 1099 elems->lnk_id = (void *)(pos - 2); 1100 break; 1101 case WLAN_EID_CHAN_SWITCH_TIMING: 1102 if (elen < sizeof(struct ieee80211_ch_switch_timing)) { 1103 elem_parse_failed = true; 1104 break; 1105 } 1106 elems->ch_sw_timing = (void *)pos; 1107 break; 1108 case WLAN_EID_EXT_CAPABILITY: 1109 elems->ext_capab = pos; 1110 elems->ext_capab_len = elen; 1111 break; 1112 case WLAN_EID_SSID: 1113 elems->ssid = pos; 1114 elems->ssid_len = elen; 1115 break; 1116 case WLAN_EID_SUPP_RATES: 1117 elems->supp_rates = pos; 1118 elems->supp_rates_len = elen; 1119 break; 1120 case WLAN_EID_DS_PARAMS: 1121 if (elen >= 1) 1122 elems->ds_params = pos; 1123 else 1124 elem_parse_failed = true; 1125 break; 1126 case WLAN_EID_TIM: 1127 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1128 elems->tim = (void *)pos; 1129 elems->tim_len = elen; 1130 } else 1131 elem_parse_failed = true; 1132 break; 1133 case WLAN_EID_VENDOR_SPECIFIC: 1134 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1135 pos[2] == 0xf2) { 1136 /* Microsoft OUI (00:50:F2) */ 1137 1138 if (calc_crc) 1139 crc = crc32_be(crc, pos - 2, elen + 2); 1140 1141 if (elen >= 5 && pos[3] == 2) { 1142 /* OUI Type 2 - WMM IE */ 1143 if (pos[4] == 0) { 1144 elems->wmm_info = pos; 1145 elems->wmm_info_len = elen; 1146 } else if (pos[4] == 1) { 1147 elems->wmm_param = pos; 1148 elems->wmm_param_len = elen; 1149 } 1150 } 1151 } 1152 break; 1153 case WLAN_EID_RSN: 1154 elems->rsn = pos; 1155 elems->rsn_len = elen; 1156 break; 1157 case WLAN_EID_ERP_INFO: 1158 if (elen >= 1) 1159 elems->erp_info = pos; 1160 else 1161 elem_parse_failed = true; 1162 break; 1163 case WLAN_EID_EXT_SUPP_RATES: 1164 elems->ext_supp_rates = pos; 1165 elems->ext_supp_rates_len = elen; 1166 break; 1167 case WLAN_EID_HT_CAPABILITY: 1168 if (elen >= sizeof(struct ieee80211_ht_cap)) 1169 elems->ht_cap_elem = (void *)pos; 1170 else 1171 elem_parse_failed = true; 1172 break; 1173 case WLAN_EID_HT_OPERATION: 1174 if (elen >= sizeof(struct ieee80211_ht_operation)) 1175 elems->ht_operation = (void *)pos; 1176 else 1177 elem_parse_failed = true; 1178 break; 1179 case WLAN_EID_VHT_CAPABILITY: 1180 if (elen >= sizeof(struct ieee80211_vht_cap)) 1181 elems->vht_cap_elem = (void *)pos; 1182 else 1183 elem_parse_failed = true; 1184 break; 1185 case WLAN_EID_VHT_OPERATION: 1186 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1187 elems->vht_operation = (void *)pos; 1188 if (calc_crc) 1189 crc = crc32_be(crc, pos - 2, elen + 2); 1190 break; 1191 } 1192 elem_parse_failed = true; 1193 break; 1194 case WLAN_EID_OPMODE_NOTIF: 1195 if (elen > 0) { 1196 elems->opmode_notif = pos; 1197 if (calc_crc) 1198 crc = crc32_be(crc, pos - 2, elen + 2); 1199 break; 1200 } 1201 elem_parse_failed = true; 1202 break; 1203 case WLAN_EID_MESH_ID: 1204 elems->mesh_id = pos; 1205 elems->mesh_id_len = elen; 1206 break; 1207 case WLAN_EID_MESH_CONFIG: 1208 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1209 elems->mesh_config = (void *)pos; 1210 else 1211 elem_parse_failed = true; 1212 break; 1213 case WLAN_EID_PEER_MGMT: 1214 elems->peering = pos; 1215 elems->peering_len = elen; 1216 break; 1217 case WLAN_EID_MESH_AWAKE_WINDOW: 1218 if (elen >= 2) 1219 elems->awake_window = (void *)pos; 1220 break; 1221 case WLAN_EID_PREQ: 1222 elems->preq = pos; 1223 elems->preq_len = elen; 1224 break; 1225 case WLAN_EID_PREP: 1226 elems->prep = pos; 1227 elems->prep_len = elen; 1228 break; 1229 case WLAN_EID_PERR: 1230 elems->perr = pos; 1231 elems->perr_len = elen; 1232 break; 1233 case WLAN_EID_RANN: 1234 if (elen >= sizeof(struct ieee80211_rann_ie)) 1235 elems->rann = (void *)pos; 1236 else 1237 elem_parse_failed = true; 1238 break; 1239 case WLAN_EID_CHANNEL_SWITCH: 1240 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1241 elem_parse_failed = true; 1242 break; 1243 } 1244 elems->ch_switch_ie = (void *)pos; 1245 break; 1246 case WLAN_EID_EXT_CHANSWITCH_ANN: 1247 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1248 elem_parse_failed = true; 1249 break; 1250 } 1251 elems->ext_chansw_ie = (void *)pos; 1252 break; 1253 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1254 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1255 elem_parse_failed = true; 1256 break; 1257 } 1258 elems->sec_chan_offs = (void *)pos; 1259 break; 1260 case WLAN_EID_CHAN_SWITCH_PARAM: 1261 if (elen < 1262 sizeof(*elems->mesh_chansw_params_ie)) { 1263 elem_parse_failed = true; 1264 break; 1265 } 1266 elems->mesh_chansw_params_ie = (void *)pos; 1267 break; 1268 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1269 if (!action || 1270 elen < sizeof(*elems->wide_bw_chansw_ie)) { 1271 elem_parse_failed = true; 1272 break; 1273 } 1274 elems->wide_bw_chansw_ie = (void *)pos; 1275 break; 1276 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1277 if (action) { 1278 elem_parse_failed = true; 1279 break; 1280 } 1281 /* 1282 * This is a bit tricky, but as we only care about 1283 * the wide bandwidth channel switch element, so 1284 * just parse it out manually. 1285 */ 1286 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1287 pos, elen); 1288 if (ie) { 1289 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie)) 1290 elems->wide_bw_chansw_ie = 1291 (void *)(ie + 2); 1292 else 1293 elem_parse_failed = true; 1294 } 1295 break; 1296 case WLAN_EID_COUNTRY: 1297 elems->country_elem = pos; 1298 elems->country_elem_len = elen; 1299 break; 1300 case WLAN_EID_PWR_CONSTRAINT: 1301 if (elen != 1) { 1302 elem_parse_failed = true; 1303 break; 1304 } 1305 elems->pwr_constr_elem = pos; 1306 break; 1307 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1308 /* Lots of different options exist, but we only care 1309 * about the Dynamic Transmit Power Control element. 1310 * First check for the Cisco OUI, then for the DTPC 1311 * tag (0x00). 1312 */ 1313 if (elen < 4) { 1314 elem_parse_failed = true; 1315 break; 1316 } 1317 1318 if (pos[0] != 0x00 || pos[1] != 0x40 || 1319 pos[2] != 0x96 || pos[3] != 0x00) 1320 break; 1321 1322 if (elen != 6) { 1323 elem_parse_failed = true; 1324 break; 1325 } 1326 1327 if (calc_crc) 1328 crc = crc32_be(crc, pos - 2, elen + 2); 1329 1330 elems->cisco_dtpc_elem = pos; 1331 break; 1332 case WLAN_EID_ADDBA_EXT: 1333 if (elen < sizeof(struct ieee80211_addba_ext_ie)) { 1334 elem_parse_failed = true; 1335 break; 1336 } 1337 elems->addba_ext_ie = (void *)pos; 1338 break; 1339 case WLAN_EID_TIMEOUT_INTERVAL: 1340 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1341 elems->timeout_int = (void *)pos; 1342 else 1343 elem_parse_failed = true; 1344 break; 1345 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1346 if (elen >= sizeof(*elems->max_idle_period_ie)) 1347 elems->max_idle_period_ie = (void *)pos; 1348 break; 1349 case WLAN_EID_RSNX: 1350 elems->rsnx = pos; 1351 elems->rsnx_len = elen; 1352 break; 1353 case WLAN_EID_TX_POWER_ENVELOPE: 1354 if (elen < 1 || 1355 elen > sizeof(struct ieee80211_tx_pwr_env)) 1356 break; 1357 1358 if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env)) 1359 break; 1360 1361 elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos; 1362 elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen; 1363 elems->tx_pwr_env_num++; 1364 break; 1365 case WLAN_EID_EXTENSION: 1366 ieee80211_parse_extension_element(calc_crc ? 1367 &crc : NULL, 1368 elem, elems); 1369 break; 1370 case WLAN_EID_S1G_CAPABILITIES: 1371 if (elen >= sizeof(*elems->s1g_capab)) 1372 elems->s1g_capab = (void *)pos; 1373 else 1374 elem_parse_failed = true; 1375 break; 1376 case WLAN_EID_S1G_OPERATION: 1377 if (elen == sizeof(*elems->s1g_oper)) 1378 elems->s1g_oper = (void *)pos; 1379 else 1380 elem_parse_failed = true; 1381 break; 1382 case WLAN_EID_S1G_BCN_COMPAT: 1383 if (elen == sizeof(*elems->s1g_bcn_compat)) 1384 elems->s1g_bcn_compat = (void *)pos; 1385 else 1386 elem_parse_failed = true; 1387 break; 1388 case WLAN_EID_AID_RESPONSE: 1389 if (elen == sizeof(struct ieee80211_aid_response_ie)) 1390 elems->aid_resp = (void *)pos; 1391 else 1392 elem_parse_failed = true; 1393 break; 1394 default: 1395 break; 1396 } 1397 1398 if (elem_parse_failed) 1399 elems->parse_error = true; 1400 else 1401 __set_bit(id, seen_elems); 1402 } 1403 1404 if (!for_each_element_completed(elem, start, len)) 1405 elems->parse_error = true; 1406 1407 return crc; 1408 } 1409 1410 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1411 struct ieee802_11_elems *elems, 1412 const u8 *transmitter_bssid, 1413 const u8 *bss_bssid, 1414 u8 *nontransmitted_profile) 1415 { 1416 const struct element *elem, *sub; 1417 size_t profile_len = 0; 1418 bool found = false; 1419 1420 if (!bss_bssid || !transmitter_bssid) 1421 return profile_len; 1422 1423 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1424 if (elem->datalen < 2) 1425 continue; 1426 1427 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1428 u8 new_bssid[ETH_ALEN]; 1429 const u8 *index; 1430 1431 if (sub->id != 0 || sub->datalen < 4) { 1432 /* not a valid BSS profile */ 1433 continue; 1434 } 1435 1436 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1437 sub->data[1] != 2) { 1438 /* The first element of the 1439 * Nontransmitted BSSID Profile is not 1440 * the Nontransmitted BSSID Capability 1441 * element. 1442 */ 1443 continue; 1444 } 1445 1446 memset(nontransmitted_profile, 0, len); 1447 profile_len = cfg80211_merge_profile(start, len, 1448 elem, 1449 sub, 1450 nontransmitted_profile, 1451 len); 1452 1453 /* found a Nontransmitted BSSID Profile */ 1454 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1455 nontransmitted_profile, 1456 profile_len); 1457 if (!index || index[1] < 1 || index[2] == 0) { 1458 /* Invalid MBSSID Index element */ 1459 continue; 1460 } 1461 1462 cfg80211_gen_new_bssid(transmitter_bssid, 1463 elem->data[0], 1464 index[2], 1465 new_bssid); 1466 if (ether_addr_equal(new_bssid, bss_bssid)) { 1467 found = true; 1468 elems->bssid_index_len = index[1]; 1469 elems->bssid_index = (void *)&index[2]; 1470 break; 1471 } 1472 } 1473 } 1474 1475 return found ? profile_len : 0; 1476 } 1477 1478 struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len, 1479 bool action, u64 filter, 1480 u32 crc, 1481 const u8 *transmitter_bssid, 1482 const u8 *bss_bssid) 1483 { 1484 struct ieee802_11_elems *elems; 1485 const struct element *non_inherit = NULL; 1486 u8 *nontransmitted_profile; 1487 int nontransmitted_profile_len = 0; 1488 1489 elems = kzalloc(sizeof(*elems), GFP_ATOMIC); 1490 if (!elems) 1491 return NULL; 1492 elems->ie_start = start; 1493 elems->total_len = len; 1494 1495 nontransmitted_profile = kmalloc(len, GFP_ATOMIC); 1496 if (nontransmitted_profile) { 1497 nontransmitted_profile_len = 1498 ieee802_11_find_bssid_profile(start, len, elems, 1499 transmitter_bssid, 1500 bss_bssid, 1501 nontransmitted_profile); 1502 non_inherit = 1503 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1504 nontransmitted_profile, 1505 nontransmitted_profile_len); 1506 } 1507 1508 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, 1509 crc, non_inherit); 1510 1511 /* Override with nontransmitted profile, if found */ 1512 if (nontransmitted_profile_len) 1513 _ieee802_11_parse_elems_crc(nontransmitted_profile, 1514 nontransmitted_profile_len, 1515 action, elems, 0, 0, NULL); 1516 1517 if (elems->tim && !elems->parse_error) { 1518 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1519 1520 elems->dtim_period = tim_ie->dtim_period; 1521 elems->dtim_count = tim_ie->dtim_count; 1522 } 1523 1524 /* Override DTIM period and count if needed */ 1525 if (elems->bssid_index && 1526 elems->bssid_index_len >= 1527 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1528 elems->dtim_period = elems->bssid_index->dtim_period; 1529 1530 if (elems->bssid_index && 1531 elems->bssid_index_len >= 1532 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1533 elems->dtim_count = elems->bssid_index->dtim_count; 1534 1535 kfree(nontransmitted_profile); 1536 1537 elems->crc = crc; 1538 1539 return elems; 1540 } 1541 1542 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1543 struct ieee80211_tx_queue_params 1544 *qparam, int ac) 1545 { 1546 struct ieee80211_chanctx_conf *chanctx_conf; 1547 const struct ieee80211_reg_rule *rrule; 1548 const struct ieee80211_wmm_ac *wmm_ac; 1549 u16 center_freq = 0; 1550 1551 if (sdata->vif.type != NL80211_IFTYPE_AP && 1552 sdata->vif.type != NL80211_IFTYPE_STATION) 1553 return; 1554 1555 rcu_read_lock(); 1556 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1557 if (chanctx_conf) 1558 center_freq = chanctx_conf->def.chan->center_freq; 1559 1560 if (!center_freq) { 1561 rcu_read_unlock(); 1562 return; 1563 } 1564 1565 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1566 1567 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1568 rcu_read_unlock(); 1569 return; 1570 } 1571 1572 if (sdata->vif.type == NL80211_IFTYPE_AP) 1573 wmm_ac = &rrule->wmm_rule.ap[ac]; 1574 else 1575 wmm_ac = &rrule->wmm_rule.client[ac]; 1576 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1577 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1578 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1579 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1580 rcu_read_unlock(); 1581 } 1582 1583 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1584 bool bss_notify, bool enable_qos) 1585 { 1586 struct ieee80211_local *local = sdata->local; 1587 struct ieee80211_tx_queue_params qparam; 1588 struct ieee80211_chanctx_conf *chanctx_conf; 1589 int ac; 1590 bool use_11b; 1591 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1592 int aCWmin, aCWmax; 1593 1594 if (!local->ops->conf_tx) 1595 return; 1596 1597 if (local->hw.queues < IEEE80211_NUM_ACS) 1598 return; 1599 1600 memset(&qparam, 0, sizeof(qparam)); 1601 1602 rcu_read_lock(); 1603 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1604 use_11b = (chanctx_conf && 1605 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1606 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1607 rcu_read_unlock(); 1608 1609 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1610 1611 /* Set defaults according to 802.11-2007 Table 7-37 */ 1612 aCWmax = 1023; 1613 if (use_11b) 1614 aCWmin = 31; 1615 else 1616 aCWmin = 15; 1617 1618 /* Confiure old 802.11b/g medium access rules. */ 1619 qparam.cw_max = aCWmax; 1620 qparam.cw_min = aCWmin; 1621 qparam.txop = 0; 1622 qparam.aifs = 2; 1623 1624 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1625 /* Update if QoS is enabled. */ 1626 if (enable_qos) { 1627 switch (ac) { 1628 case IEEE80211_AC_BK: 1629 qparam.cw_max = aCWmax; 1630 qparam.cw_min = aCWmin; 1631 qparam.txop = 0; 1632 if (is_ocb) 1633 qparam.aifs = 9; 1634 else 1635 qparam.aifs = 7; 1636 break; 1637 /* never happens but let's not leave undefined */ 1638 default: 1639 case IEEE80211_AC_BE: 1640 qparam.cw_max = aCWmax; 1641 qparam.cw_min = aCWmin; 1642 qparam.txop = 0; 1643 if (is_ocb) 1644 qparam.aifs = 6; 1645 else 1646 qparam.aifs = 3; 1647 break; 1648 case IEEE80211_AC_VI: 1649 qparam.cw_max = aCWmin; 1650 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1651 if (is_ocb) 1652 qparam.txop = 0; 1653 else if (use_11b) 1654 qparam.txop = 6016/32; 1655 else 1656 qparam.txop = 3008/32; 1657 1658 if (is_ocb) 1659 qparam.aifs = 3; 1660 else 1661 qparam.aifs = 2; 1662 break; 1663 case IEEE80211_AC_VO: 1664 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1665 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1666 if (is_ocb) 1667 qparam.txop = 0; 1668 else if (use_11b) 1669 qparam.txop = 3264/32; 1670 else 1671 qparam.txop = 1504/32; 1672 qparam.aifs = 2; 1673 break; 1674 } 1675 } 1676 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1677 1678 qparam.uapsd = false; 1679 1680 sdata->tx_conf[ac] = qparam; 1681 drv_conf_tx(local, sdata, ac, &qparam); 1682 } 1683 1684 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1685 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1686 sdata->vif.type != NL80211_IFTYPE_NAN) { 1687 sdata->vif.bss_conf.qos = enable_qos; 1688 if (bss_notify) 1689 ieee80211_bss_info_change_notify(sdata, 1690 BSS_CHANGED_QOS); 1691 } 1692 } 1693 1694 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1695 u16 transaction, u16 auth_alg, u16 status, 1696 const u8 *extra, size_t extra_len, const u8 *da, 1697 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1698 u32 tx_flags) 1699 { 1700 struct ieee80211_local *local = sdata->local; 1701 struct sk_buff *skb; 1702 struct ieee80211_mgmt *mgmt; 1703 int err; 1704 1705 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1706 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1707 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1708 if (!skb) 1709 return; 1710 1711 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1712 1713 mgmt = skb_put_zero(skb, 24 + 6); 1714 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1715 IEEE80211_STYPE_AUTH); 1716 memcpy(mgmt->da, da, ETH_ALEN); 1717 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1718 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1719 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1720 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1721 mgmt->u.auth.status_code = cpu_to_le16(status); 1722 if (extra) 1723 skb_put_data(skb, extra, extra_len); 1724 1725 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1726 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1727 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1728 if (WARN_ON(err)) { 1729 kfree_skb(skb); 1730 return; 1731 } 1732 } 1733 1734 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1735 tx_flags; 1736 ieee80211_tx_skb(sdata, skb); 1737 } 1738 1739 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1740 const u8 *da, const u8 *bssid, 1741 u16 stype, u16 reason, 1742 bool send_frame, u8 *frame_buf) 1743 { 1744 struct ieee80211_local *local = sdata->local; 1745 struct sk_buff *skb; 1746 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1747 1748 /* build frame */ 1749 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1750 mgmt->duration = 0; /* initialize only */ 1751 mgmt->seq_ctrl = 0; /* initialize only */ 1752 memcpy(mgmt->da, da, ETH_ALEN); 1753 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1754 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1755 /* u.deauth.reason_code == u.disassoc.reason_code */ 1756 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1757 1758 if (send_frame) { 1759 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1760 IEEE80211_DEAUTH_FRAME_LEN); 1761 if (!skb) 1762 return; 1763 1764 skb_reserve(skb, local->hw.extra_tx_headroom); 1765 1766 /* copy in frame */ 1767 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1768 1769 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1770 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1771 IEEE80211_SKB_CB(skb)->flags |= 1772 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1773 1774 ieee80211_tx_skb(sdata, skb); 1775 } 1776 } 1777 1778 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end) 1779 { 1780 if ((end - pos) < 5) 1781 return pos; 1782 1783 *pos++ = WLAN_EID_EXTENSION; 1784 *pos++ = 1 + sizeof(cap); 1785 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA; 1786 memcpy(pos, &cap, sizeof(cap)); 1787 1788 return pos + 2; 1789 } 1790 1791 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata, 1792 u8 *buffer, size_t buffer_len, 1793 const u8 *ie, size_t ie_len, 1794 enum nl80211_band band, 1795 u32 rate_mask, 1796 struct cfg80211_chan_def *chandef, 1797 size_t *offset, u32 flags) 1798 { 1799 struct ieee80211_local *local = sdata->local; 1800 struct ieee80211_supported_band *sband; 1801 const struct ieee80211_sta_he_cap *he_cap; 1802 u8 *pos = buffer, *end = buffer + buffer_len; 1803 size_t noffset; 1804 int supp_rates_len, i; 1805 u8 rates[32]; 1806 int num_rates; 1807 int ext_rates_len; 1808 int shift; 1809 u32 rate_flags; 1810 bool have_80mhz = false; 1811 1812 *offset = 0; 1813 1814 sband = local->hw.wiphy->bands[band]; 1815 if (WARN_ON_ONCE(!sband)) 1816 return 0; 1817 1818 rate_flags = ieee80211_chandef_rate_flags(chandef); 1819 shift = ieee80211_chandef_get_shift(chandef); 1820 1821 num_rates = 0; 1822 for (i = 0; i < sband->n_bitrates; i++) { 1823 if ((BIT(i) & rate_mask) == 0) 1824 continue; /* skip rate */ 1825 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1826 continue; 1827 1828 rates[num_rates++] = 1829 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1830 (1 << shift) * 5); 1831 } 1832 1833 supp_rates_len = min_t(int, num_rates, 8); 1834 1835 if (end - pos < 2 + supp_rates_len) 1836 goto out_err; 1837 *pos++ = WLAN_EID_SUPP_RATES; 1838 *pos++ = supp_rates_len; 1839 memcpy(pos, rates, supp_rates_len); 1840 pos += supp_rates_len; 1841 1842 /* insert "request information" if in custom IEs */ 1843 if (ie && ie_len) { 1844 static const u8 before_extrates[] = { 1845 WLAN_EID_SSID, 1846 WLAN_EID_SUPP_RATES, 1847 WLAN_EID_REQUEST, 1848 }; 1849 noffset = ieee80211_ie_split(ie, ie_len, 1850 before_extrates, 1851 ARRAY_SIZE(before_extrates), 1852 *offset); 1853 if (end - pos < noffset - *offset) 1854 goto out_err; 1855 memcpy(pos, ie + *offset, noffset - *offset); 1856 pos += noffset - *offset; 1857 *offset = noffset; 1858 } 1859 1860 ext_rates_len = num_rates - supp_rates_len; 1861 if (ext_rates_len > 0) { 1862 if (end - pos < 2 + ext_rates_len) 1863 goto out_err; 1864 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1865 *pos++ = ext_rates_len; 1866 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1867 pos += ext_rates_len; 1868 } 1869 1870 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1871 if (end - pos < 3) 1872 goto out_err; 1873 *pos++ = WLAN_EID_DS_PARAMS; 1874 *pos++ = 1; 1875 *pos++ = ieee80211_frequency_to_channel( 1876 chandef->chan->center_freq); 1877 } 1878 1879 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1880 goto done; 1881 1882 /* insert custom IEs that go before HT */ 1883 if (ie && ie_len) { 1884 static const u8 before_ht[] = { 1885 /* 1886 * no need to list the ones split off already 1887 * (or generated here) 1888 */ 1889 WLAN_EID_DS_PARAMS, 1890 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1891 }; 1892 noffset = ieee80211_ie_split(ie, ie_len, 1893 before_ht, ARRAY_SIZE(before_ht), 1894 *offset); 1895 if (end - pos < noffset - *offset) 1896 goto out_err; 1897 memcpy(pos, ie + *offset, noffset - *offset); 1898 pos += noffset - *offset; 1899 *offset = noffset; 1900 } 1901 1902 if (sband->ht_cap.ht_supported) { 1903 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1904 goto out_err; 1905 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1906 sband->ht_cap.cap); 1907 } 1908 1909 /* insert custom IEs that go before VHT */ 1910 if (ie && ie_len) { 1911 static const u8 before_vht[] = { 1912 /* 1913 * no need to list the ones split off already 1914 * (or generated here) 1915 */ 1916 WLAN_EID_BSS_COEX_2040, 1917 WLAN_EID_EXT_CAPABILITY, 1918 WLAN_EID_SSID_LIST, 1919 WLAN_EID_CHANNEL_USAGE, 1920 WLAN_EID_INTERWORKING, 1921 WLAN_EID_MESH_ID, 1922 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1923 }; 1924 noffset = ieee80211_ie_split(ie, ie_len, 1925 before_vht, ARRAY_SIZE(before_vht), 1926 *offset); 1927 if (end - pos < noffset - *offset) 1928 goto out_err; 1929 memcpy(pos, ie + *offset, noffset - *offset); 1930 pos += noffset - *offset; 1931 *offset = noffset; 1932 } 1933 1934 /* Check if any channel in this sband supports at least 80 MHz */ 1935 for (i = 0; i < sband->n_channels; i++) { 1936 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1937 IEEE80211_CHAN_NO_80MHZ)) 1938 continue; 1939 1940 have_80mhz = true; 1941 break; 1942 } 1943 1944 if (sband->vht_cap.vht_supported && have_80mhz) { 1945 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1946 goto out_err; 1947 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1948 sband->vht_cap.cap); 1949 } 1950 1951 /* insert custom IEs that go before HE */ 1952 if (ie && ie_len) { 1953 static const u8 before_he[] = { 1954 /* 1955 * no need to list the ones split off before VHT 1956 * or generated here 1957 */ 1958 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1959 WLAN_EID_AP_CSN, 1960 /* TODO: add 11ah/11aj/11ak elements */ 1961 }; 1962 noffset = ieee80211_ie_split(ie, ie_len, 1963 before_he, ARRAY_SIZE(before_he), 1964 *offset); 1965 if (end - pos < noffset - *offset) 1966 goto out_err; 1967 memcpy(pos, ie + *offset, noffset - *offset); 1968 pos += noffset - *offset; 1969 *offset = noffset; 1970 } 1971 1972 he_cap = ieee80211_get_he_iftype_cap(sband, 1973 ieee80211_vif_type_p2p(&sdata->vif)); 1974 if (he_cap && 1975 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1976 IEEE80211_CHAN_NO_HE)) { 1977 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1978 if (!pos) 1979 goto out_err; 1980 } 1981 1982 if (cfg80211_any_usable_channels(local->hw.wiphy, 1983 BIT(NL80211_BAND_6GHZ), 1984 IEEE80211_CHAN_NO_HE)) { 1985 struct ieee80211_supported_band *sband6; 1986 1987 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 1988 he_cap = ieee80211_get_he_iftype_cap(sband6, 1989 ieee80211_vif_type_p2p(&sdata->vif)); 1990 1991 if (he_cap) { 1992 enum nl80211_iftype iftype = 1993 ieee80211_vif_type_p2p(&sdata->vif); 1994 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype); 1995 1996 pos = ieee80211_write_he_6ghz_cap(pos, cap, end); 1997 } 1998 } 1999 2000 /* 2001 * If adding more here, adjust code in main.c 2002 * that calculates local->scan_ies_len. 2003 */ 2004 2005 return pos - buffer; 2006 out_err: 2007 WARN_ONCE(1, "not enough space for preq IEs\n"); 2008 done: 2009 return pos - buffer; 2010 } 2011 2012 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 2013 size_t buffer_len, 2014 struct ieee80211_scan_ies *ie_desc, 2015 const u8 *ie, size_t ie_len, 2016 u8 bands_used, u32 *rate_masks, 2017 struct cfg80211_chan_def *chandef, 2018 u32 flags) 2019 { 2020 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 2021 int i; 2022 2023 memset(ie_desc, 0, sizeof(*ie_desc)); 2024 2025 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2026 if (bands_used & BIT(i)) { 2027 pos += ieee80211_build_preq_ies_band(sdata, 2028 buffer + pos, 2029 buffer_len - pos, 2030 ie, ie_len, i, 2031 rate_masks[i], 2032 chandef, 2033 &custom_ie_offset, 2034 flags); 2035 ie_desc->ies[i] = buffer + old_pos; 2036 ie_desc->len[i] = pos - old_pos; 2037 old_pos = pos; 2038 } 2039 } 2040 2041 /* add any remaining custom IEs */ 2042 if (ie && ie_len) { 2043 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 2044 "not enough space for preq custom IEs\n")) 2045 return pos; 2046 memcpy(buffer + pos, ie + custom_ie_offset, 2047 ie_len - custom_ie_offset); 2048 ie_desc->common_ies = buffer + pos; 2049 ie_desc->common_ie_len = ie_len - custom_ie_offset; 2050 pos += ie_len - custom_ie_offset; 2051 } 2052 2053 return pos; 2054 }; 2055 2056 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 2057 const u8 *src, const u8 *dst, 2058 u32 ratemask, 2059 struct ieee80211_channel *chan, 2060 const u8 *ssid, size_t ssid_len, 2061 const u8 *ie, size_t ie_len, 2062 u32 flags) 2063 { 2064 struct ieee80211_local *local = sdata->local; 2065 struct cfg80211_chan_def chandef; 2066 struct sk_buff *skb; 2067 struct ieee80211_mgmt *mgmt; 2068 int ies_len; 2069 u32 rate_masks[NUM_NL80211_BANDS] = {}; 2070 struct ieee80211_scan_ies dummy_ie_desc; 2071 2072 /* 2073 * Do not send DS Channel parameter for directed probe requests 2074 * in order to maximize the chance that we get a response. Some 2075 * badly-behaved APs don't respond when this parameter is included. 2076 */ 2077 chandef.width = sdata->vif.bss_conf.chandef.width; 2078 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 2079 chandef.chan = NULL; 2080 else 2081 chandef.chan = chan; 2082 2083 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 2084 local->scan_ies_len + ie_len); 2085 if (!skb) 2086 return NULL; 2087 2088 rate_masks[chan->band] = ratemask; 2089 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb), 2090 skb_tailroom(skb), &dummy_ie_desc, 2091 ie, ie_len, BIT(chan->band), 2092 rate_masks, &chandef, flags); 2093 skb_put(skb, ies_len); 2094 2095 if (dst) { 2096 mgmt = (struct ieee80211_mgmt *) skb->data; 2097 memcpy(mgmt->da, dst, ETH_ALEN); 2098 memcpy(mgmt->bssid, dst, ETH_ALEN); 2099 } 2100 2101 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2102 2103 return skb; 2104 } 2105 2106 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 2107 struct ieee802_11_elems *elems, 2108 enum nl80211_band band, u32 *basic_rates) 2109 { 2110 struct ieee80211_supported_band *sband; 2111 size_t num_rates; 2112 u32 supp_rates, rate_flags; 2113 int i, j, shift; 2114 2115 sband = sdata->local->hw.wiphy->bands[band]; 2116 if (WARN_ON(!sband)) 2117 return 1; 2118 2119 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2120 shift = ieee80211_vif_get_shift(&sdata->vif); 2121 2122 num_rates = sband->n_bitrates; 2123 supp_rates = 0; 2124 for (i = 0; i < elems->supp_rates_len + 2125 elems->ext_supp_rates_len; i++) { 2126 u8 rate = 0; 2127 int own_rate; 2128 bool is_basic; 2129 if (i < elems->supp_rates_len) 2130 rate = elems->supp_rates[i]; 2131 else if (elems->ext_supp_rates) 2132 rate = elems->ext_supp_rates 2133 [i - elems->supp_rates_len]; 2134 own_rate = 5 * (rate & 0x7f); 2135 is_basic = !!(rate & 0x80); 2136 2137 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2138 continue; 2139 2140 for (j = 0; j < num_rates; j++) { 2141 int brate; 2142 if ((rate_flags & sband->bitrates[j].flags) 2143 != rate_flags) 2144 continue; 2145 2146 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 2147 1 << shift); 2148 2149 if (brate == own_rate) { 2150 supp_rates |= BIT(j); 2151 if (basic_rates && is_basic) 2152 *basic_rates |= BIT(j); 2153 } 2154 } 2155 } 2156 return supp_rates; 2157 } 2158 2159 void ieee80211_stop_device(struct ieee80211_local *local) 2160 { 2161 ieee80211_led_radio(local, false); 2162 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2163 2164 cancel_work_sync(&local->reconfig_filter); 2165 2166 flush_workqueue(local->workqueue); 2167 drv_stop(local); 2168 } 2169 2170 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2171 bool aborted) 2172 { 2173 /* It's possible that we don't handle the scan completion in 2174 * time during suspend, so if it's still marked as completed 2175 * here, queue the work and flush it to clean things up. 2176 * Instead of calling the worker function directly here, we 2177 * really queue it to avoid potential races with other flows 2178 * scheduling the same work. 2179 */ 2180 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2181 /* If coming from reconfiguration failure, abort the scan so 2182 * we don't attempt to continue a partial HW scan - which is 2183 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2184 * completed scan, and a 5 GHz portion is still pending. 2185 */ 2186 if (aborted) 2187 set_bit(SCAN_ABORTED, &local->scanning); 2188 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2189 flush_delayed_work(&local->scan_work); 2190 } 2191 } 2192 2193 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2194 { 2195 struct ieee80211_sub_if_data *sdata; 2196 struct ieee80211_chanctx *ctx; 2197 2198 /* 2199 * We get here if during resume the device can't be restarted properly. 2200 * We might also get here if this happens during HW reset, which is a 2201 * slightly different situation and we need to drop all connections in 2202 * the latter case. 2203 * 2204 * Ask cfg80211 to turn off all interfaces, this will result in more 2205 * warnings but at least we'll then get into a clean stopped state. 2206 */ 2207 2208 local->resuming = false; 2209 local->suspended = false; 2210 local->in_reconfig = false; 2211 2212 ieee80211_flush_completed_scan(local, true); 2213 2214 /* scheduled scan clearly can't be running any more, but tell 2215 * cfg80211 and clear local state 2216 */ 2217 ieee80211_sched_scan_end(local); 2218 2219 list_for_each_entry(sdata, &local->interfaces, list) 2220 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2221 2222 /* Mark channel contexts as not being in the driver any more to avoid 2223 * removing them from the driver during the shutdown process... 2224 */ 2225 mutex_lock(&local->chanctx_mtx); 2226 list_for_each_entry(ctx, &local->chanctx_list, list) 2227 ctx->driver_present = false; 2228 mutex_unlock(&local->chanctx_mtx); 2229 } 2230 2231 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2232 struct ieee80211_sub_if_data *sdata) 2233 { 2234 struct ieee80211_chanctx_conf *conf; 2235 struct ieee80211_chanctx *ctx; 2236 2237 if (!local->use_chanctx) 2238 return; 2239 2240 mutex_lock(&local->chanctx_mtx); 2241 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2242 lockdep_is_held(&local->chanctx_mtx)); 2243 if (conf) { 2244 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2245 drv_assign_vif_chanctx(local, sdata, ctx); 2246 } 2247 mutex_unlock(&local->chanctx_mtx); 2248 } 2249 2250 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2251 { 2252 struct ieee80211_local *local = sdata->local; 2253 struct sta_info *sta; 2254 2255 /* add STAs back */ 2256 mutex_lock(&local->sta_mtx); 2257 list_for_each_entry(sta, &local->sta_list, list) { 2258 enum ieee80211_sta_state state; 2259 2260 if (!sta->uploaded || sta->sdata != sdata) 2261 continue; 2262 2263 for (state = IEEE80211_STA_NOTEXIST; 2264 state < sta->sta_state; state++) 2265 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2266 state + 1)); 2267 } 2268 mutex_unlock(&local->sta_mtx); 2269 } 2270 2271 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2272 { 2273 struct cfg80211_nan_func *func, **funcs; 2274 int res, id, i = 0; 2275 2276 res = drv_start_nan(sdata->local, sdata, 2277 &sdata->u.nan.conf); 2278 if (WARN_ON(res)) 2279 return res; 2280 2281 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2282 sizeof(*funcs), 2283 GFP_KERNEL); 2284 if (!funcs) 2285 return -ENOMEM; 2286 2287 /* Add all the functions: 2288 * This is a little bit ugly. We need to call a potentially sleeping 2289 * callback for each NAN function, so we can't hold the spinlock. 2290 */ 2291 spin_lock_bh(&sdata->u.nan.func_lock); 2292 2293 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2294 funcs[i++] = func; 2295 2296 spin_unlock_bh(&sdata->u.nan.func_lock); 2297 2298 for (i = 0; funcs[i]; i++) { 2299 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2300 if (WARN_ON(res)) 2301 ieee80211_nan_func_terminated(&sdata->vif, 2302 funcs[i]->instance_id, 2303 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2304 GFP_KERNEL); 2305 } 2306 2307 kfree(funcs); 2308 2309 return 0; 2310 } 2311 2312 int ieee80211_reconfig(struct ieee80211_local *local) 2313 { 2314 struct ieee80211_hw *hw = &local->hw; 2315 struct ieee80211_sub_if_data *sdata; 2316 struct ieee80211_chanctx *ctx; 2317 struct sta_info *sta; 2318 int res, i; 2319 bool reconfig_due_to_wowlan = false; 2320 struct ieee80211_sub_if_data *sched_scan_sdata; 2321 struct cfg80211_sched_scan_request *sched_scan_req; 2322 bool sched_scan_stopped = false; 2323 bool suspended = local->suspended; 2324 2325 /* nothing to do if HW shouldn't run */ 2326 if (!local->open_count) 2327 goto wake_up; 2328 2329 #ifdef CONFIG_PM 2330 if (suspended) 2331 local->resuming = true; 2332 2333 if (local->wowlan) { 2334 /* 2335 * In the wowlan case, both mac80211 and the device 2336 * are functional when the resume op is called, so 2337 * clear local->suspended so the device could operate 2338 * normally (e.g. pass rx frames). 2339 */ 2340 local->suspended = false; 2341 res = drv_resume(local); 2342 local->wowlan = false; 2343 if (res < 0) { 2344 local->resuming = false; 2345 return res; 2346 } 2347 if (res == 0) 2348 goto wake_up; 2349 WARN_ON(res > 1); 2350 /* 2351 * res is 1, which means the driver requested 2352 * to go through a regular reset on wakeup. 2353 * restore local->suspended in this case. 2354 */ 2355 reconfig_due_to_wowlan = true; 2356 local->suspended = true; 2357 } 2358 #endif 2359 2360 /* 2361 * In case of hw_restart during suspend (without wowlan), 2362 * cancel restart work, as we are reconfiguring the device 2363 * anyway. 2364 * Note that restart_work is scheduled on a frozen workqueue, 2365 * so we can't deadlock in this case. 2366 */ 2367 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2368 cancel_work_sync(&local->restart_work); 2369 2370 local->started = false; 2371 2372 /* 2373 * Upon resume hardware can sometimes be goofy due to 2374 * various platform / driver / bus issues, so restarting 2375 * the device may at times not work immediately. Propagate 2376 * the error. 2377 */ 2378 res = drv_start(local); 2379 if (res) { 2380 if (suspended) 2381 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2382 else 2383 WARN(1, "Hardware became unavailable during restart.\n"); 2384 ieee80211_handle_reconfig_failure(local); 2385 return res; 2386 } 2387 2388 /* setup fragmentation threshold */ 2389 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2390 2391 /* setup RTS threshold */ 2392 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2393 2394 /* reset coverage class */ 2395 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2396 2397 ieee80211_led_radio(local, true); 2398 ieee80211_mod_tpt_led_trig(local, 2399 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2400 2401 /* add interfaces */ 2402 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2403 if (sdata) { 2404 /* in HW restart it exists already */ 2405 WARN_ON(local->resuming); 2406 res = drv_add_interface(local, sdata); 2407 if (WARN_ON(res)) { 2408 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2409 synchronize_net(); 2410 kfree(sdata); 2411 } 2412 } 2413 2414 list_for_each_entry(sdata, &local->interfaces, list) { 2415 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2416 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2417 ieee80211_sdata_running(sdata)) { 2418 res = drv_add_interface(local, sdata); 2419 if (WARN_ON(res)) 2420 break; 2421 } 2422 } 2423 2424 /* If adding any of the interfaces failed above, roll back and 2425 * report failure. 2426 */ 2427 if (res) { 2428 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2429 list) 2430 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2431 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2432 ieee80211_sdata_running(sdata)) 2433 drv_remove_interface(local, sdata); 2434 ieee80211_handle_reconfig_failure(local); 2435 return res; 2436 } 2437 2438 /* add channel contexts */ 2439 if (local->use_chanctx) { 2440 mutex_lock(&local->chanctx_mtx); 2441 list_for_each_entry(ctx, &local->chanctx_list, list) 2442 if (ctx->replace_state != 2443 IEEE80211_CHANCTX_REPLACES_OTHER) 2444 WARN_ON(drv_add_chanctx(local, ctx)); 2445 mutex_unlock(&local->chanctx_mtx); 2446 2447 sdata = wiphy_dereference(local->hw.wiphy, 2448 local->monitor_sdata); 2449 if (sdata && ieee80211_sdata_running(sdata)) 2450 ieee80211_assign_chanctx(local, sdata); 2451 } 2452 2453 /* reconfigure hardware */ 2454 ieee80211_hw_config(local, ~0); 2455 2456 ieee80211_configure_filter(local); 2457 2458 /* Finally also reconfigure all the BSS information */ 2459 list_for_each_entry(sdata, &local->interfaces, list) { 2460 u32 changed; 2461 2462 if (!ieee80211_sdata_running(sdata)) 2463 continue; 2464 2465 ieee80211_assign_chanctx(local, sdata); 2466 2467 switch (sdata->vif.type) { 2468 case NL80211_IFTYPE_AP_VLAN: 2469 case NL80211_IFTYPE_MONITOR: 2470 break; 2471 case NL80211_IFTYPE_ADHOC: 2472 if (sdata->vif.bss_conf.ibss_joined) 2473 WARN_ON(drv_join_ibss(local, sdata)); 2474 fallthrough; 2475 default: 2476 ieee80211_reconfig_stations(sdata); 2477 fallthrough; 2478 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2479 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2480 drv_conf_tx(local, sdata, i, 2481 &sdata->tx_conf[i]); 2482 break; 2483 } 2484 2485 /* common change flags for all interface types */ 2486 changed = BSS_CHANGED_ERP_CTS_PROT | 2487 BSS_CHANGED_ERP_PREAMBLE | 2488 BSS_CHANGED_ERP_SLOT | 2489 BSS_CHANGED_HT | 2490 BSS_CHANGED_BASIC_RATES | 2491 BSS_CHANGED_BEACON_INT | 2492 BSS_CHANGED_BSSID | 2493 BSS_CHANGED_CQM | 2494 BSS_CHANGED_QOS | 2495 BSS_CHANGED_IDLE | 2496 BSS_CHANGED_TXPOWER | 2497 BSS_CHANGED_MCAST_RATE; 2498 2499 if (sdata->vif.mu_mimo_owner) 2500 changed |= BSS_CHANGED_MU_GROUPS; 2501 2502 switch (sdata->vif.type) { 2503 case NL80211_IFTYPE_STATION: 2504 changed |= BSS_CHANGED_ASSOC | 2505 BSS_CHANGED_ARP_FILTER | 2506 BSS_CHANGED_PS; 2507 2508 /* Re-send beacon info report to the driver */ 2509 if (sdata->u.mgd.have_beacon) 2510 changed |= BSS_CHANGED_BEACON_INFO; 2511 2512 if (sdata->vif.bss_conf.max_idle_period || 2513 sdata->vif.bss_conf.protected_keep_alive) 2514 changed |= BSS_CHANGED_KEEP_ALIVE; 2515 2516 sdata_lock(sdata); 2517 ieee80211_bss_info_change_notify(sdata, changed); 2518 sdata_unlock(sdata); 2519 break; 2520 case NL80211_IFTYPE_OCB: 2521 changed |= BSS_CHANGED_OCB; 2522 ieee80211_bss_info_change_notify(sdata, changed); 2523 break; 2524 case NL80211_IFTYPE_ADHOC: 2525 changed |= BSS_CHANGED_IBSS; 2526 fallthrough; 2527 case NL80211_IFTYPE_AP: 2528 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2529 2530 if (sdata->vif.bss_conf.ftm_responder == 1 && 2531 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2532 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2533 changed |= BSS_CHANGED_FTM_RESPONDER; 2534 2535 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2536 changed |= BSS_CHANGED_AP_PROBE_RESP; 2537 2538 if (rcu_access_pointer(sdata->u.ap.beacon)) 2539 drv_start_ap(local, sdata); 2540 } 2541 fallthrough; 2542 case NL80211_IFTYPE_MESH_POINT: 2543 if (sdata->vif.bss_conf.enable_beacon) { 2544 changed |= BSS_CHANGED_BEACON | 2545 BSS_CHANGED_BEACON_ENABLED; 2546 ieee80211_bss_info_change_notify(sdata, changed); 2547 } 2548 break; 2549 case NL80211_IFTYPE_NAN: 2550 res = ieee80211_reconfig_nan(sdata); 2551 if (res < 0) { 2552 ieee80211_handle_reconfig_failure(local); 2553 return res; 2554 } 2555 break; 2556 case NL80211_IFTYPE_AP_VLAN: 2557 case NL80211_IFTYPE_MONITOR: 2558 case NL80211_IFTYPE_P2P_DEVICE: 2559 /* nothing to do */ 2560 break; 2561 case NL80211_IFTYPE_UNSPECIFIED: 2562 case NUM_NL80211_IFTYPES: 2563 case NL80211_IFTYPE_P2P_CLIENT: 2564 case NL80211_IFTYPE_P2P_GO: 2565 case NL80211_IFTYPE_WDS: 2566 WARN_ON(1); 2567 break; 2568 } 2569 } 2570 2571 ieee80211_recalc_ps(local); 2572 2573 /* 2574 * The sta might be in psm against the ap (e.g. because 2575 * this was the state before a hw restart), so we 2576 * explicitly send a null packet in order to make sure 2577 * it'll sync against the ap (and get out of psm). 2578 */ 2579 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2580 list_for_each_entry(sdata, &local->interfaces, list) { 2581 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2582 continue; 2583 if (!sdata->u.mgd.associated) 2584 continue; 2585 2586 ieee80211_send_nullfunc(local, sdata, false); 2587 } 2588 } 2589 2590 /* APs are now beaconing, add back stations */ 2591 mutex_lock(&local->sta_mtx); 2592 list_for_each_entry(sta, &local->sta_list, list) { 2593 enum ieee80211_sta_state state; 2594 2595 if (!sta->uploaded) 2596 continue; 2597 2598 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2599 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2600 continue; 2601 2602 for (state = IEEE80211_STA_NOTEXIST; 2603 state < sta->sta_state; state++) 2604 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2605 state + 1)); 2606 } 2607 mutex_unlock(&local->sta_mtx); 2608 2609 /* add back keys */ 2610 list_for_each_entry(sdata, &local->interfaces, list) 2611 ieee80211_reenable_keys(sdata); 2612 2613 /* Reconfigure sched scan if it was interrupted by FW restart */ 2614 mutex_lock(&local->mtx); 2615 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2616 lockdep_is_held(&local->mtx)); 2617 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2618 lockdep_is_held(&local->mtx)); 2619 if (sched_scan_sdata && sched_scan_req) 2620 /* 2621 * Sched scan stopped, but we don't want to report it. Instead, 2622 * we're trying to reschedule. However, if more than one scan 2623 * plan was set, we cannot reschedule since we don't know which 2624 * scan plan was currently running (and some scan plans may have 2625 * already finished). 2626 */ 2627 if (sched_scan_req->n_scan_plans > 1 || 2628 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2629 sched_scan_req)) { 2630 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2631 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2632 sched_scan_stopped = true; 2633 } 2634 mutex_unlock(&local->mtx); 2635 2636 if (sched_scan_stopped) 2637 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2638 2639 wake_up: 2640 2641 if (local->monitors == local->open_count && local->monitors > 0) 2642 ieee80211_add_virtual_monitor(local); 2643 2644 /* 2645 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2646 * sessions can be established after a resume. 2647 * 2648 * Also tear down aggregation sessions since reconfiguring 2649 * them in a hardware restart scenario is not easily done 2650 * right now, and the hardware will have lost information 2651 * about the sessions, but we and the AP still think they 2652 * are active. This is really a workaround though. 2653 */ 2654 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2655 mutex_lock(&local->sta_mtx); 2656 2657 list_for_each_entry(sta, &local->sta_list, list) { 2658 if (!local->resuming) 2659 ieee80211_sta_tear_down_BA_sessions( 2660 sta, AGG_STOP_LOCAL_REQUEST); 2661 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2662 } 2663 2664 mutex_unlock(&local->sta_mtx); 2665 } 2666 2667 /* 2668 * If this is for hw restart things are still running. 2669 * We may want to change that later, however. 2670 */ 2671 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2672 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2673 2674 if (local->in_reconfig) { 2675 local->in_reconfig = false; 2676 barrier(); 2677 2678 /* Restart deferred ROCs */ 2679 mutex_lock(&local->mtx); 2680 ieee80211_start_next_roc(local); 2681 mutex_unlock(&local->mtx); 2682 2683 /* Requeue all works */ 2684 list_for_each_entry(sdata, &local->interfaces, list) 2685 ieee80211_queue_work(&local->hw, &sdata->work); 2686 } 2687 2688 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2689 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2690 false); 2691 2692 if (!suspended) 2693 return 0; 2694 2695 #ifdef CONFIG_PM 2696 /* first set suspended false, then resuming */ 2697 local->suspended = false; 2698 mb(); 2699 local->resuming = false; 2700 2701 ieee80211_flush_completed_scan(local, false); 2702 2703 if (local->open_count && !reconfig_due_to_wowlan) 2704 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2705 2706 list_for_each_entry(sdata, &local->interfaces, list) { 2707 if (!ieee80211_sdata_running(sdata)) 2708 continue; 2709 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2710 ieee80211_sta_restart(sdata); 2711 } 2712 2713 mod_timer(&local->sta_cleanup, jiffies + 1); 2714 #else 2715 WARN_ON(1); 2716 #endif 2717 2718 return 0; 2719 } 2720 2721 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2722 { 2723 struct ieee80211_sub_if_data *sdata; 2724 struct ieee80211_local *local; 2725 struct ieee80211_key *key; 2726 2727 if (WARN_ON(!vif)) 2728 return; 2729 2730 sdata = vif_to_sdata(vif); 2731 local = sdata->local; 2732 2733 if (WARN_ON(!local->resuming)) 2734 return; 2735 2736 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2737 return; 2738 2739 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2740 2741 mutex_lock(&local->key_mtx); 2742 list_for_each_entry(key, &sdata->key_list, list) 2743 key->flags |= KEY_FLAG_TAINTED; 2744 mutex_unlock(&local->key_mtx); 2745 } 2746 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2747 2748 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2749 { 2750 struct ieee80211_local *local = sdata->local; 2751 struct ieee80211_chanctx_conf *chanctx_conf; 2752 struct ieee80211_chanctx *chanctx; 2753 2754 mutex_lock(&local->chanctx_mtx); 2755 2756 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2757 lockdep_is_held(&local->chanctx_mtx)); 2758 2759 /* 2760 * This function can be called from a work, thus it may be possible 2761 * that the chanctx_conf is removed (due to a disconnection, for 2762 * example). 2763 * So nothing should be done in such case. 2764 */ 2765 if (!chanctx_conf) 2766 goto unlock; 2767 2768 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2769 ieee80211_recalc_smps_chanctx(local, chanctx); 2770 unlock: 2771 mutex_unlock(&local->chanctx_mtx); 2772 } 2773 2774 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2775 { 2776 struct ieee80211_local *local = sdata->local; 2777 struct ieee80211_chanctx_conf *chanctx_conf; 2778 struct ieee80211_chanctx *chanctx; 2779 2780 mutex_lock(&local->chanctx_mtx); 2781 2782 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2783 lockdep_is_held(&local->chanctx_mtx)); 2784 2785 if (WARN_ON_ONCE(!chanctx_conf)) 2786 goto unlock; 2787 2788 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2789 ieee80211_recalc_chanctx_min_def(local, chanctx); 2790 unlock: 2791 mutex_unlock(&local->chanctx_mtx); 2792 } 2793 2794 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2795 { 2796 size_t pos = offset; 2797 2798 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2799 pos += 2 + ies[pos + 1]; 2800 2801 return pos; 2802 } 2803 2804 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2805 int rssi_min_thold, 2806 int rssi_max_thold) 2807 { 2808 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2809 2810 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2811 return; 2812 2813 /* 2814 * Scale up threshold values before storing it, as the RSSI averaging 2815 * algorithm uses a scaled up value as well. Change this scaling 2816 * factor if the RSSI averaging algorithm changes. 2817 */ 2818 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2819 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2820 } 2821 2822 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2823 int rssi_min_thold, 2824 int rssi_max_thold) 2825 { 2826 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2827 2828 WARN_ON(rssi_min_thold == rssi_max_thold || 2829 rssi_min_thold > rssi_max_thold); 2830 2831 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2832 rssi_max_thold); 2833 } 2834 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2835 2836 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2837 { 2838 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2839 2840 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2841 } 2842 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2843 2844 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2845 u16 cap) 2846 { 2847 __le16 tmp; 2848 2849 *pos++ = WLAN_EID_HT_CAPABILITY; 2850 *pos++ = sizeof(struct ieee80211_ht_cap); 2851 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2852 2853 /* capability flags */ 2854 tmp = cpu_to_le16(cap); 2855 memcpy(pos, &tmp, sizeof(u16)); 2856 pos += sizeof(u16); 2857 2858 /* AMPDU parameters */ 2859 *pos++ = ht_cap->ampdu_factor | 2860 (ht_cap->ampdu_density << 2861 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2862 2863 /* MCS set */ 2864 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2865 pos += sizeof(ht_cap->mcs); 2866 2867 /* extended capabilities */ 2868 pos += sizeof(__le16); 2869 2870 /* BF capabilities */ 2871 pos += sizeof(__le32); 2872 2873 /* antenna selection */ 2874 pos += sizeof(u8); 2875 2876 return pos; 2877 } 2878 2879 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2880 u32 cap) 2881 { 2882 __le32 tmp; 2883 2884 *pos++ = WLAN_EID_VHT_CAPABILITY; 2885 *pos++ = sizeof(struct ieee80211_vht_cap); 2886 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2887 2888 /* capability flags */ 2889 tmp = cpu_to_le32(cap); 2890 memcpy(pos, &tmp, sizeof(u32)); 2891 pos += sizeof(u32); 2892 2893 /* VHT MCS set */ 2894 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2895 pos += sizeof(vht_cap->vht_mcs); 2896 2897 return pos; 2898 } 2899 2900 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2901 { 2902 const struct ieee80211_sta_he_cap *he_cap; 2903 struct ieee80211_supported_band *sband; 2904 u8 n; 2905 2906 sband = ieee80211_get_sband(sdata); 2907 if (!sband) 2908 return 0; 2909 2910 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2911 if (!he_cap) 2912 return 0; 2913 2914 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2915 return 2 + 1 + 2916 sizeof(he_cap->he_cap_elem) + n + 2917 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2918 he_cap->he_cap_elem.phy_cap_info); 2919 } 2920 2921 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2922 const struct ieee80211_sta_he_cap *he_cap, 2923 u8 *end) 2924 { 2925 u8 n; 2926 u8 ie_len; 2927 u8 *orig_pos = pos; 2928 2929 /* Make sure we have place for the IE */ 2930 /* 2931 * TODO: the 1 added is because this temporarily is under the EXTENSION 2932 * IE. Get rid of it when it moves. 2933 */ 2934 if (!he_cap) 2935 return orig_pos; 2936 2937 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2938 ie_len = 2 + 1 + 2939 sizeof(he_cap->he_cap_elem) + n + 2940 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2941 he_cap->he_cap_elem.phy_cap_info); 2942 2943 if ((end - pos) < ie_len) 2944 return orig_pos; 2945 2946 *pos++ = WLAN_EID_EXTENSION; 2947 pos++; /* We'll set the size later below */ 2948 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2949 2950 /* Fixed data */ 2951 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2952 pos += sizeof(he_cap->he_cap_elem); 2953 2954 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2955 pos += n; 2956 2957 /* Check if PPE Threshold should be present */ 2958 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2959 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2960 goto end; 2961 2962 /* 2963 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2964 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2965 */ 2966 n = hweight8(he_cap->ppe_thres[0] & 2967 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2968 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2969 IEEE80211_PPE_THRES_NSS_POS)); 2970 2971 /* 2972 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2973 * total size. 2974 */ 2975 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2976 n = DIV_ROUND_UP(n, 8); 2977 2978 /* Copy PPE Thresholds */ 2979 memcpy(pos, &he_cap->ppe_thres, n); 2980 pos += n; 2981 2982 end: 2983 orig_pos[1] = (pos - orig_pos) - 2; 2984 return pos; 2985 } 2986 2987 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata, 2988 struct sk_buff *skb) 2989 { 2990 struct ieee80211_supported_band *sband; 2991 const struct ieee80211_sband_iftype_data *iftd; 2992 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2993 u8 *pos; 2994 u16 cap; 2995 2996 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 2997 BIT(NL80211_BAND_6GHZ), 2998 IEEE80211_CHAN_NO_HE)) 2999 return; 3000 3001 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3002 3003 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 3004 if (!iftd) 3005 return; 3006 3007 /* Check for device HE 6 GHz capability before adding element */ 3008 if (!iftd->he_6ghz_capa.capa) 3009 return; 3010 3011 cap = le16_to_cpu(iftd->he_6ghz_capa.capa); 3012 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS; 3013 3014 switch (sdata->smps_mode) { 3015 case IEEE80211_SMPS_AUTOMATIC: 3016 case IEEE80211_SMPS_NUM_MODES: 3017 WARN_ON(1); 3018 fallthrough; 3019 case IEEE80211_SMPS_OFF: 3020 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 3021 IEEE80211_HE_6GHZ_CAP_SM_PS); 3022 break; 3023 case IEEE80211_SMPS_STATIC: 3024 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 3025 IEEE80211_HE_6GHZ_CAP_SM_PS); 3026 break; 3027 case IEEE80211_SMPS_DYNAMIC: 3028 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 3029 IEEE80211_HE_6GHZ_CAP_SM_PS); 3030 break; 3031 } 3032 3033 pos = skb_put(skb, 2 + 1 + sizeof(cap)); 3034 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap), 3035 pos + 2 + 1 + sizeof(cap)); 3036 } 3037 3038 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3039 const struct cfg80211_chan_def *chandef, 3040 u16 prot_mode, bool rifs_mode) 3041 { 3042 struct ieee80211_ht_operation *ht_oper; 3043 /* Build HT Information */ 3044 *pos++ = WLAN_EID_HT_OPERATION; 3045 *pos++ = sizeof(struct ieee80211_ht_operation); 3046 ht_oper = (struct ieee80211_ht_operation *)pos; 3047 ht_oper->primary_chan = ieee80211_frequency_to_channel( 3048 chandef->chan->center_freq); 3049 switch (chandef->width) { 3050 case NL80211_CHAN_WIDTH_160: 3051 case NL80211_CHAN_WIDTH_80P80: 3052 case NL80211_CHAN_WIDTH_80: 3053 case NL80211_CHAN_WIDTH_40: 3054 if (chandef->center_freq1 > chandef->chan->center_freq) 3055 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3056 else 3057 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3058 break; 3059 default: 3060 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 3061 break; 3062 } 3063 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 3064 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 3065 chandef->width != NL80211_CHAN_WIDTH_20) 3066 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 3067 3068 if (rifs_mode) 3069 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 3070 3071 ht_oper->operation_mode = cpu_to_le16(prot_mode); 3072 ht_oper->stbc_param = 0x0000; 3073 3074 /* It seems that Basic MCS set and Supported MCS set 3075 are identical for the first 10 bytes */ 3076 memset(&ht_oper->basic_set, 0, 16); 3077 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 3078 3079 return pos + sizeof(struct ieee80211_ht_operation); 3080 } 3081 3082 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 3083 const struct cfg80211_chan_def *chandef) 3084 { 3085 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 3086 *pos++ = 3; /* IE length */ 3087 /* New channel width */ 3088 switch (chandef->width) { 3089 case NL80211_CHAN_WIDTH_80: 3090 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 3091 break; 3092 case NL80211_CHAN_WIDTH_160: 3093 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 3094 break; 3095 case NL80211_CHAN_WIDTH_80P80: 3096 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 3097 break; 3098 default: 3099 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 3100 } 3101 3102 /* new center frequency segment 0 */ 3103 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 3104 /* new center frequency segment 1 */ 3105 if (chandef->center_freq2) 3106 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 3107 else 3108 *pos++ = 0; 3109 } 3110 3111 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3112 const struct cfg80211_chan_def *chandef) 3113 { 3114 struct ieee80211_vht_operation *vht_oper; 3115 3116 *pos++ = WLAN_EID_VHT_OPERATION; 3117 *pos++ = sizeof(struct ieee80211_vht_operation); 3118 vht_oper = (struct ieee80211_vht_operation *)pos; 3119 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 3120 chandef->center_freq1); 3121 if (chandef->center_freq2) 3122 vht_oper->center_freq_seg1_idx = 3123 ieee80211_frequency_to_channel(chandef->center_freq2); 3124 else 3125 vht_oper->center_freq_seg1_idx = 0x00; 3126 3127 switch (chandef->width) { 3128 case NL80211_CHAN_WIDTH_160: 3129 /* 3130 * Convert 160 MHz channel width to new style as interop 3131 * workaround. 3132 */ 3133 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3134 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 3135 if (chandef->chan->center_freq < chandef->center_freq1) 3136 vht_oper->center_freq_seg0_idx -= 8; 3137 else 3138 vht_oper->center_freq_seg0_idx += 8; 3139 break; 3140 case NL80211_CHAN_WIDTH_80P80: 3141 /* 3142 * Convert 80+80 MHz channel width to new style as interop 3143 * workaround. 3144 */ 3145 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3146 break; 3147 case NL80211_CHAN_WIDTH_80: 3148 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3149 break; 3150 default: 3151 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 3152 break; 3153 } 3154 3155 /* don't require special VHT peer rates */ 3156 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 3157 3158 return pos + sizeof(struct ieee80211_vht_operation); 3159 } 3160 3161 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef) 3162 { 3163 struct ieee80211_he_operation *he_oper; 3164 struct ieee80211_he_6ghz_oper *he_6ghz_op; 3165 u32 he_oper_params; 3166 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 3167 3168 if (chandef->chan->band == NL80211_BAND_6GHZ) 3169 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 3170 3171 *pos++ = WLAN_EID_EXTENSION; 3172 *pos++ = ie_len; 3173 *pos++ = WLAN_EID_EXT_HE_OPERATION; 3174 3175 he_oper_params = 0; 3176 he_oper_params |= u32_encode_bits(1023, /* disabled */ 3177 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3178 he_oper_params |= u32_encode_bits(1, 3179 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 3180 he_oper_params |= u32_encode_bits(1, 3181 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3182 if (chandef->chan->band == NL80211_BAND_6GHZ) 3183 he_oper_params |= u32_encode_bits(1, 3184 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 3185 3186 he_oper = (struct ieee80211_he_operation *)pos; 3187 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 3188 3189 /* don't require special HE peer rates */ 3190 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 3191 pos += sizeof(struct ieee80211_he_operation); 3192 3193 if (chandef->chan->band != NL80211_BAND_6GHZ) 3194 goto out; 3195 3196 /* TODO add VHT operational */ 3197 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3198 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3199 he_6ghz_op->primary = 3200 ieee80211_frequency_to_channel(chandef->chan->center_freq); 3201 he_6ghz_op->ccfs0 = 3202 ieee80211_frequency_to_channel(chandef->center_freq1); 3203 if (chandef->center_freq2) 3204 he_6ghz_op->ccfs1 = 3205 ieee80211_frequency_to_channel(chandef->center_freq2); 3206 else 3207 he_6ghz_op->ccfs1 = 0; 3208 3209 switch (chandef->width) { 3210 case NL80211_CHAN_WIDTH_160: 3211 /* Convert 160 MHz channel width to new style as interop 3212 * workaround. 3213 */ 3214 he_6ghz_op->control = 3215 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3216 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3217 if (chandef->chan->center_freq < chandef->center_freq1) 3218 he_6ghz_op->ccfs0 -= 8; 3219 else 3220 he_6ghz_op->ccfs0 += 8; 3221 fallthrough; 3222 case NL80211_CHAN_WIDTH_80P80: 3223 he_6ghz_op->control = 3224 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3225 break; 3226 case NL80211_CHAN_WIDTH_80: 3227 he_6ghz_op->control = 3228 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3229 break; 3230 case NL80211_CHAN_WIDTH_40: 3231 he_6ghz_op->control = 3232 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3233 break; 3234 default: 3235 he_6ghz_op->control = 3236 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3237 break; 3238 } 3239 3240 pos += sizeof(struct ieee80211_he_6ghz_oper); 3241 3242 out: 3243 return pos; 3244 } 3245 3246 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3247 struct cfg80211_chan_def *chandef) 3248 { 3249 enum nl80211_channel_type channel_type; 3250 3251 if (!ht_oper) 3252 return false; 3253 3254 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3255 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3256 channel_type = NL80211_CHAN_HT20; 3257 break; 3258 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3259 channel_type = NL80211_CHAN_HT40PLUS; 3260 break; 3261 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3262 channel_type = NL80211_CHAN_HT40MINUS; 3263 break; 3264 default: 3265 channel_type = NL80211_CHAN_NO_HT; 3266 return false; 3267 } 3268 3269 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3270 return true; 3271 } 3272 3273 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3274 const struct ieee80211_vht_operation *oper, 3275 const struct ieee80211_ht_operation *htop, 3276 struct cfg80211_chan_def *chandef) 3277 { 3278 struct cfg80211_chan_def new = *chandef; 3279 int cf0, cf1; 3280 int ccfs0, ccfs1, ccfs2; 3281 int ccf0, ccf1; 3282 u32 vht_cap; 3283 bool support_80_80 = false; 3284 bool support_160 = false; 3285 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3286 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3287 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3288 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3289 3290 if (!oper || !htop) 3291 return false; 3292 3293 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3294 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3295 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3296 support_80_80 = ((vht_cap & 3297 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3298 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3299 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3300 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3301 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3302 ccfs0 = oper->center_freq_seg0_idx; 3303 ccfs1 = oper->center_freq_seg1_idx; 3304 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3305 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3306 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3307 3308 ccf0 = ccfs0; 3309 3310 /* if not supported, parse as though we didn't understand it */ 3311 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3312 ext_nss_bw_supp = 0; 3313 3314 /* 3315 * Cf. IEEE 802.11 Table 9-250 3316 * 3317 * We really just consider that because it's inefficient to connect 3318 * at a higher bandwidth than we'll actually be able to use. 3319 */ 3320 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3321 default: 3322 case 0x00: 3323 ccf1 = 0; 3324 support_160 = false; 3325 support_80_80 = false; 3326 break; 3327 case 0x01: 3328 support_80_80 = false; 3329 fallthrough; 3330 case 0x02: 3331 case 0x03: 3332 ccf1 = ccfs2; 3333 break; 3334 case 0x10: 3335 ccf1 = ccfs1; 3336 break; 3337 case 0x11: 3338 case 0x12: 3339 if (!ccfs1) 3340 ccf1 = ccfs2; 3341 else 3342 ccf1 = ccfs1; 3343 break; 3344 case 0x13: 3345 case 0x20: 3346 case 0x23: 3347 ccf1 = ccfs1; 3348 break; 3349 } 3350 3351 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3352 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3353 3354 switch (oper->chan_width) { 3355 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3356 /* just use HT information directly */ 3357 break; 3358 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3359 new.width = NL80211_CHAN_WIDTH_80; 3360 new.center_freq1 = cf0; 3361 /* If needed, adjust based on the newer interop workaround. */ 3362 if (ccf1) { 3363 unsigned int diff; 3364 3365 diff = abs(ccf1 - ccf0); 3366 if ((diff == 8) && support_160) { 3367 new.width = NL80211_CHAN_WIDTH_160; 3368 new.center_freq1 = cf1; 3369 } else if ((diff > 8) && support_80_80) { 3370 new.width = NL80211_CHAN_WIDTH_80P80; 3371 new.center_freq2 = cf1; 3372 } 3373 } 3374 break; 3375 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3376 /* deprecated encoding */ 3377 new.width = NL80211_CHAN_WIDTH_160; 3378 new.center_freq1 = cf0; 3379 break; 3380 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3381 /* deprecated encoding */ 3382 new.width = NL80211_CHAN_WIDTH_80P80; 3383 new.center_freq1 = cf0; 3384 new.center_freq2 = cf1; 3385 break; 3386 default: 3387 return false; 3388 } 3389 3390 if (!cfg80211_chandef_valid(&new)) 3391 return false; 3392 3393 *chandef = new; 3394 return true; 3395 } 3396 3397 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata, 3398 const struct ieee80211_he_operation *he_oper, 3399 struct cfg80211_chan_def *chandef) 3400 { 3401 struct ieee80211_local *local = sdata->local; 3402 struct ieee80211_supported_band *sband; 3403 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3404 const struct ieee80211_sta_he_cap *he_cap; 3405 struct cfg80211_chan_def he_chandef = *chandef; 3406 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3407 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3408 bool support_80_80, support_160; 3409 u8 he_phy_cap; 3410 u32 freq; 3411 3412 if (chandef->chan->band != NL80211_BAND_6GHZ) 3413 return true; 3414 3415 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3416 3417 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3418 if (!he_cap) { 3419 sdata_info(sdata, "Missing iftype sband data/HE cap"); 3420 return false; 3421 } 3422 3423 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0]; 3424 support_160 = 3425 he_phy_cap & 3426 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3427 support_80_80 = 3428 he_phy_cap & 3429 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3430 3431 if (!he_oper) { 3432 sdata_info(sdata, 3433 "HE is not advertised on (on %d MHz), expect issues\n", 3434 chandef->chan->center_freq); 3435 return false; 3436 } 3437 3438 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3439 3440 if (!he_6ghz_oper) { 3441 sdata_info(sdata, 3442 "HE 6GHz operation missing (on %d MHz), expect issues\n", 3443 chandef->chan->center_freq); 3444 return false; 3445 } 3446 3447 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3448 NL80211_BAND_6GHZ); 3449 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 3450 3451 switch (u8_get_bits(he_6ghz_oper->control, 3452 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 3453 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 3454 bss_conf->power_type = IEEE80211_REG_LPI_AP; 3455 break; 3456 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 3457 bss_conf->power_type = IEEE80211_REG_SP_AP; 3458 break; 3459 default: 3460 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 3461 break; 3462 } 3463 3464 switch (u8_get_bits(he_6ghz_oper->control, 3465 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3466 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3467 he_chandef.width = NL80211_CHAN_WIDTH_20; 3468 break; 3469 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3470 he_chandef.width = NL80211_CHAN_WIDTH_40; 3471 break; 3472 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3473 he_chandef.width = NL80211_CHAN_WIDTH_80; 3474 break; 3475 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3476 he_chandef.width = NL80211_CHAN_WIDTH_80; 3477 if (!he_6ghz_oper->ccfs1) 3478 break; 3479 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) { 3480 if (support_160) 3481 he_chandef.width = NL80211_CHAN_WIDTH_160; 3482 } else { 3483 if (support_80_80) 3484 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3485 } 3486 break; 3487 } 3488 3489 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3490 he_chandef.center_freq1 = 3491 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3492 NL80211_BAND_6GHZ); 3493 } else { 3494 he_chandef.center_freq1 = 3495 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3496 NL80211_BAND_6GHZ); 3497 if (support_80_80 || support_160) 3498 he_chandef.center_freq2 = 3499 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3500 NL80211_BAND_6GHZ); 3501 } 3502 3503 if (!cfg80211_chandef_valid(&he_chandef)) { 3504 sdata_info(sdata, 3505 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n", 3506 he_chandef.chan ? he_chandef.chan->center_freq : 0, 3507 he_chandef.width, 3508 he_chandef.center_freq1, 3509 he_chandef.center_freq2); 3510 return false; 3511 } 3512 3513 *chandef = he_chandef; 3514 3515 return true; 3516 } 3517 3518 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper, 3519 struct cfg80211_chan_def *chandef) 3520 { 3521 u32 oper_freq; 3522 3523 if (!oper) 3524 return false; 3525 3526 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3527 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3528 chandef->width = NL80211_CHAN_WIDTH_1; 3529 break; 3530 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3531 chandef->width = NL80211_CHAN_WIDTH_2; 3532 break; 3533 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3534 chandef->width = NL80211_CHAN_WIDTH_4; 3535 break; 3536 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3537 chandef->width = NL80211_CHAN_WIDTH_8; 3538 break; 3539 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3540 chandef->width = NL80211_CHAN_WIDTH_16; 3541 break; 3542 default: 3543 return false; 3544 } 3545 3546 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch, 3547 NL80211_BAND_S1GHZ); 3548 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq); 3549 chandef->freq1_offset = oper_freq % 1000; 3550 3551 return true; 3552 } 3553 3554 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 3555 const struct ieee80211_supported_band *sband, 3556 const u8 *srates, int srates_len, u32 *rates) 3557 { 3558 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 3559 int shift = ieee80211_chandef_get_shift(chandef); 3560 struct ieee80211_rate *br; 3561 int brate, rate, i, j, count = 0; 3562 3563 *rates = 0; 3564 3565 for (i = 0; i < srates_len; i++) { 3566 rate = srates[i] & 0x7f; 3567 3568 for (j = 0; j < sband->n_bitrates; j++) { 3569 br = &sband->bitrates[j]; 3570 if ((rate_flags & br->flags) != rate_flags) 3571 continue; 3572 3573 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3574 if (brate == rate) { 3575 *rates |= BIT(j); 3576 count++; 3577 break; 3578 } 3579 } 3580 } 3581 return count; 3582 } 3583 3584 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3585 struct sk_buff *skb, bool need_basic, 3586 enum nl80211_band band) 3587 { 3588 struct ieee80211_local *local = sdata->local; 3589 struct ieee80211_supported_band *sband; 3590 int rate, shift; 3591 u8 i, rates, *pos; 3592 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3593 u32 rate_flags; 3594 3595 shift = ieee80211_vif_get_shift(&sdata->vif); 3596 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3597 sband = local->hw.wiphy->bands[band]; 3598 rates = 0; 3599 for (i = 0; i < sband->n_bitrates; i++) { 3600 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3601 continue; 3602 rates++; 3603 } 3604 if (rates > 8) 3605 rates = 8; 3606 3607 if (skb_tailroom(skb) < rates + 2) 3608 return -ENOMEM; 3609 3610 pos = skb_put(skb, rates + 2); 3611 *pos++ = WLAN_EID_SUPP_RATES; 3612 *pos++ = rates; 3613 for (i = 0; i < rates; i++) { 3614 u8 basic = 0; 3615 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3616 continue; 3617 3618 if (need_basic && basic_rates & BIT(i)) 3619 basic = 0x80; 3620 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3621 5 * (1 << shift)); 3622 *pos++ = basic | (u8) rate; 3623 } 3624 3625 return 0; 3626 } 3627 3628 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3629 struct sk_buff *skb, bool need_basic, 3630 enum nl80211_band band) 3631 { 3632 struct ieee80211_local *local = sdata->local; 3633 struct ieee80211_supported_band *sband; 3634 int rate, shift; 3635 u8 i, exrates, *pos; 3636 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3637 u32 rate_flags; 3638 3639 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3640 shift = ieee80211_vif_get_shift(&sdata->vif); 3641 3642 sband = local->hw.wiphy->bands[band]; 3643 exrates = 0; 3644 for (i = 0; i < sband->n_bitrates; i++) { 3645 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3646 continue; 3647 exrates++; 3648 } 3649 3650 if (exrates > 8) 3651 exrates -= 8; 3652 else 3653 exrates = 0; 3654 3655 if (skb_tailroom(skb) < exrates + 2) 3656 return -ENOMEM; 3657 3658 if (exrates) { 3659 pos = skb_put(skb, exrates + 2); 3660 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3661 *pos++ = exrates; 3662 for (i = 8; i < sband->n_bitrates; i++) { 3663 u8 basic = 0; 3664 if ((rate_flags & sband->bitrates[i].flags) 3665 != rate_flags) 3666 continue; 3667 if (need_basic && basic_rates & BIT(i)) 3668 basic = 0x80; 3669 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3670 5 * (1 << shift)); 3671 *pos++ = basic | (u8) rate; 3672 } 3673 } 3674 return 0; 3675 } 3676 3677 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3678 { 3679 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3680 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3681 3682 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 3683 /* non-managed type inferfaces */ 3684 return 0; 3685 } 3686 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3687 } 3688 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3689 3690 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3691 { 3692 if (!mcs) 3693 return 1; 3694 3695 /* TODO: consider rx_highest */ 3696 3697 if (mcs->rx_mask[3]) 3698 return 4; 3699 if (mcs->rx_mask[2]) 3700 return 3; 3701 if (mcs->rx_mask[1]) 3702 return 2; 3703 return 1; 3704 } 3705 3706 /** 3707 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3708 * @local: mac80211 hw info struct 3709 * @status: RX status 3710 * @mpdu_len: total MPDU length (including FCS) 3711 * @mpdu_offset: offset into MPDU to calculate timestamp at 3712 * 3713 * This function calculates the RX timestamp at the given MPDU offset, taking 3714 * into account what the RX timestamp was. An offset of 0 will just normalize 3715 * the timestamp to TSF at beginning of MPDU reception. 3716 */ 3717 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3718 struct ieee80211_rx_status *status, 3719 unsigned int mpdu_len, 3720 unsigned int mpdu_offset) 3721 { 3722 u64 ts = status->mactime; 3723 struct rate_info ri; 3724 u16 rate; 3725 u8 n_ltf; 3726 3727 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3728 return 0; 3729 3730 memset(&ri, 0, sizeof(ri)); 3731 3732 ri.bw = status->bw; 3733 3734 /* Fill cfg80211 rate info */ 3735 switch (status->encoding) { 3736 case RX_ENC_HE: 3737 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3738 ri.mcs = status->rate_idx; 3739 ri.nss = status->nss; 3740 ri.he_ru_alloc = status->he_ru; 3741 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3742 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3743 3744 /* 3745 * See P802.11ax_D6.0, section 27.3.4 for 3746 * VHT PPDU format. 3747 */ 3748 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3749 mpdu_offset += 2; 3750 ts += 36; 3751 3752 /* 3753 * TODO: 3754 * For HE MU PPDU, add the HE-SIG-B. 3755 * For HE ER PPDU, add 8us for the HE-SIG-A. 3756 * For HE TB PPDU, add 4us for the HE-STF. 3757 * Add the HE-LTF durations - variable. 3758 */ 3759 } 3760 3761 break; 3762 case RX_ENC_HT: 3763 ri.mcs = status->rate_idx; 3764 ri.flags |= RATE_INFO_FLAGS_MCS; 3765 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3766 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3767 3768 /* 3769 * See P802.11REVmd_D3.0, section 19.3.2 for 3770 * HT PPDU format. 3771 */ 3772 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3773 mpdu_offset += 2; 3774 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3775 ts += 24; 3776 else 3777 ts += 32; 3778 3779 /* 3780 * Add Data HT-LTFs per streams 3781 * TODO: add Extension HT-LTFs, 4us per LTF 3782 */ 3783 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3784 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3785 ts += n_ltf * 4; 3786 } 3787 3788 break; 3789 case RX_ENC_VHT: 3790 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3791 ri.mcs = status->rate_idx; 3792 ri.nss = status->nss; 3793 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3794 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3795 3796 /* 3797 * See P802.11REVmd_D3.0, section 21.3.2 for 3798 * VHT PPDU format. 3799 */ 3800 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3801 mpdu_offset += 2; 3802 ts += 36; 3803 3804 /* 3805 * Add VHT-LTFs per streams 3806 */ 3807 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3808 ri.nss + 1 : ri.nss; 3809 ts += 4 * n_ltf; 3810 } 3811 3812 break; 3813 default: 3814 WARN_ON(1); 3815 fallthrough; 3816 case RX_ENC_LEGACY: { 3817 struct ieee80211_supported_band *sband; 3818 int shift = 0; 3819 int bitrate; 3820 3821 switch (status->bw) { 3822 case RATE_INFO_BW_10: 3823 shift = 1; 3824 break; 3825 case RATE_INFO_BW_5: 3826 shift = 2; 3827 break; 3828 } 3829 3830 sband = local->hw.wiphy->bands[status->band]; 3831 bitrate = sband->bitrates[status->rate_idx].bitrate; 3832 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3833 3834 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3835 if (status->band == NL80211_BAND_5GHZ) { 3836 ts += 20 << shift; 3837 mpdu_offset += 2; 3838 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3839 ts += 96; 3840 } else { 3841 ts += 192; 3842 } 3843 } 3844 break; 3845 } 3846 } 3847 3848 rate = cfg80211_calculate_bitrate(&ri); 3849 if (WARN_ONCE(!rate, 3850 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3851 (unsigned long long)status->flag, status->rate_idx, 3852 status->nss)) 3853 return 0; 3854 3855 /* rewind from end of MPDU */ 3856 if (status->flag & RX_FLAG_MACTIME_END) 3857 ts -= mpdu_len * 8 * 10 / rate; 3858 3859 ts += mpdu_offset * 8 * 10 / rate; 3860 3861 return ts; 3862 } 3863 3864 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3865 { 3866 struct ieee80211_sub_if_data *sdata; 3867 struct cfg80211_chan_def chandef; 3868 3869 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3870 lockdep_assert_wiphy(local->hw.wiphy); 3871 3872 mutex_lock(&local->mtx); 3873 list_for_each_entry(sdata, &local->interfaces, list) { 3874 /* it might be waiting for the local->mtx, but then 3875 * by the time it gets it, sdata->wdev.cac_started 3876 * will no longer be true 3877 */ 3878 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3879 3880 if (sdata->wdev.cac_started) { 3881 chandef = sdata->vif.bss_conf.chandef; 3882 ieee80211_vif_release_channel(sdata); 3883 cfg80211_cac_event(sdata->dev, 3884 &chandef, 3885 NL80211_RADAR_CAC_ABORTED, 3886 GFP_KERNEL); 3887 } 3888 } 3889 mutex_unlock(&local->mtx); 3890 } 3891 3892 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3893 { 3894 struct ieee80211_local *local = 3895 container_of(work, struct ieee80211_local, radar_detected_work); 3896 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3897 struct ieee80211_chanctx *ctx; 3898 int num_chanctx = 0; 3899 3900 mutex_lock(&local->chanctx_mtx); 3901 list_for_each_entry(ctx, &local->chanctx_list, list) { 3902 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3903 continue; 3904 3905 num_chanctx++; 3906 chandef = ctx->conf.def; 3907 } 3908 mutex_unlock(&local->chanctx_mtx); 3909 3910 wiphy_lock(local->hw.wiphy); 3911 ieee80211_dfs_cac_cancel(local); 3912 wiphy_unlock(local->hw.wiphy); 3913 3914 if (num_chanctx > 1) 3915 /* XXX: multi-channel is not supported yet */ 3916 WARN_ON(1); 3917 else 3918 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3919 } 3920 3921 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3922 { 3923 struct ieee80211_local *local = hw_to_local(hw); 3924 3925 trace_api_radar_detected(local); 3926 3927 schedule_work(&local->radar_detected_work); 3928 } 3929 EXPORT_SYMBOL(ieee80211_radar_detected); 3930 3931 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3932 { 3933 u32 ret; 3934 int tmp; 3935 3936 switch (c->width) { 3937 case NL80211_CHAN_WIDTH_20: 3938 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3939 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3940 break; 3941 case NL80211_CHAN_WIDTH_40: 3942 c->width = NL80211_CHAN_WIDTH_20; 3943 c->center_freq1 = c->chan->center_freq; 3944 ret = IEEE80211_STA_DISABLE_40MHZ | 3945 IEEE80211_STA_DISABLE_VHT; 3946 break; 3947 case NL80211_CHAN_WIDTH_80: 3948 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3949 /* n_P40 */ 3950 tmp /= 2; 3951 /* freq_P40 */ 3952 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3953 c->width = NL80211_CHAN_WIDTH_40; 3954 ret = IEEE80211_STA_DISABLE_VHT; 3955 break; 3956 case NL80211_CHAN_WIDTH_80P80: 3957 c->center_freq2 = 0; 3958 c->width = NL80211_CHAN_WIDTH_80; 3959 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3960 IEEE80211_STA_DISABLE_160MHZ; 3961 break; 3962 case NL80211_CHAN_WIDTH_160: 3963 /* n_P20 */ 3964 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3965 /* n_P80 */ 3966 tmp /= 4; 3967 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3968 c->width = NL80211_CHAN_WIDTH_80; 3969 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3970 IEEE80211_STA_DISABLE_160MHZ; 3971 break; 3972 default: 3973 case NL80211_CHAN_WIDTH_20_NOHT: 3974 WARN_ON_ONCE(1); 3975 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3976 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3977 break; 3978 case NL80211_CHAN_WIDTH_1: 3979 case NL80211_CHAN_WIDTH_2: 3980 case NL80211_CHAN_WIDTH_4: 3981 case NL80211_CHAN_WIDTH_8: 3982 case NL80211_CHAN_WIDTH_16: 3983 case NL80211_CHAN_WIDTH_5: 3984 case NL80211_CHAN_WIDTH_10: 3985 WARN_ON_ONCE(1); 3986 /* keep c->width */ 3987 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3988 break; 3989 } 3990 3991 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3992 3993 return ret; 3994 } 3995 3996 /* 3997 * Returns true if smps_mode_new is strictly more restrictive than 3998 * smps_mode_old. 3999 */ 4000 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 4001 enum ieee80211_smps_mode smps_mode_new) 4002 { 4003 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 4004 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 4005 return false; 4006 4007 switch (smps_mode_old) { 4008 case IEEE80211_SMPS_STATIC: 4009 return false; 4010 case IEEE80211_SMPS_DYNAMIC: 4011 return smps_mode_new == IEEE80211_SMPS_STATIC; 4012 case IEEE80211_SMPS_OFF: 4013 return smps_mode_new != IEEE80211_SMPS_OFF; 4014 default: 4015 WARN_ON(1); 4016 } 4017 4018 return false; 4019 } 4020 4021 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 4022 struct cfg80211_csa_settings *csa_settings) 4023 { 4024 struct sk_buff *skb; 4025 struct ieee80211_mgmt *mgmt; 4026 struct ieee80211_local *local = sdata->local; 4027 int freq; 4028 int hdr_len = offsetofend(struct ieee80211_mgmt, 4029 u.action.u.chan_switch); 4030 u8 *pos; 4031 4032 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 4033 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 4034 return -EOPNOTSUPP; 4035 4036 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 4037 5 + /* channel switch announcement element */ 4038 3 + /* secondary channel offset element */ 4039 5 + /* wide bandwidth channel switch announcement */ 4040 8); /* mesh channel switch parameters element */ 4041 if (!skb) 4042 return -ENOMEM; 4043 4044 skb_reserve(skb, local->tx_headroom); 4045 mgmt = skb_put_zero(skb, hdr_len); 4046 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 4047 IEEE80211_STYPE_ACTION); 4048 4049 eth_broadcast_addr(mgmt->da); 4050 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 4051 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4052 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 4053 } else { 4054 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 4055 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 4056 } 4057 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 4058 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 4059 pos = skb_put(skb, 5); 4060 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 4061 *pos++ = 3; /* IE length */ 4062 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 4063 freq = csa_settings->chandef.chan->center_freq; 4064 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 4065 *pos++ = csa_settings->count; /* count */ 4066 4067 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 4068 enum nl80211_channel_type ch_type; 4069 4070 skb_put(skb, 3); 4071 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 4072 *pos++ = 1; /* IE length */ 4073 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 4074 if (ch_type == NL80211_CHAN_HT40PLUS) 4075 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 4076 else 4077 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 4078 } 4079 4080 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4081 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 4082 4083 skb_put(skb, 8); 4084 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 4085 *pos++ = 6; /* IE length */ 4086 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 4087 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 4088 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 4089 *pos++ |= csa_settings->block_tx ? 4090 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 4091 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 4092 pos += 2; 4093 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 4094 pos += 2; 4095 } 4096 4097 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 4098 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 4099 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 4100 skb_put(skb, 5); 4101 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 4102 } 4103 4104 ieee80211_tx_skb(sdata, skb); 4105 return 0; 4106 } 4107 4108 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 4109 { 4110 return !(cs == NULL || cs->cipher == 0 || 4111 cs->hdr_len < cs->pn_len + cs->pn_off || 4112 cs->hdr_len <= cs->key_idx_off || 4113 cs->key_idx_shift > 7 || 4114 cs->key_idx_mask == 0); 4115 } 4116 4117 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 4118 { 4119 int i; 4120 4121 /* Ensure we have enough iftype bitmap space for all iftype values */ 4122 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 4123 4124 for (i = 0; i < n; i++) 4125 if (!ieee80211_cs_valid(&cs[i])) 4126 return false; 4127 4128 return true; 4129 } 4130 4131 const struct ieee80211_cipher_scheme * 4132 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 4133 enum nl80211_iftype iftype) 4134 { 4135 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 4136 int n = local->hw.n_cipher_schemes; 4137 int i; 4138 const struct ieee80211_cipher_scheme *cs = NULL; 4139 4140 for (i = 0; i < n; i++) { 4141 if (l[i].cipher == cipher) { 4142 cs = &l[i]; 4143 break; 4144 } 4145 } 4146 4147 if (!cs || !(cs->iftype & BIT(iftype))) 4148 return NULL; 4149 4150 return cs; 4151 } 4152 4153 int ieee80211_cs_headroom(struct ieee80211_local *local, 4154 struct cfg80211_crypto_settings *crypto, 4155 enum nl80211_iftype iftype) 4156 { 4157 const struct ieee80211_cipher_scheme *cs; 4158 int headroom = IEEE80211_ENCRYPT_HEADROOM; 4159 int i; 4160 4161 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 4162 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 4163 iftype); 4164 4165 if (cs && headroom < cs->hdr_len) 4166 headroom = cs->hdr_len; 4167 } 4168 4169 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 4170 if (cs && headroom < cs->hdr_len) 4171 headroom = cs->hdr_len; 4172 4173 return headroom; 4174 } 4175 4176 static bool 4177 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 4178 { 4179 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 4180 int skip; 4181 4182 if (end > 0) 4183 return false; 4184 4185 /* One shot NOA */ 4186 if (data->count[i] == 1) 4187 return false; 4188 4189 if (data->desc[i].interval == 0) 4190 return false; 4191 4192 /* End time is in the past, check for repetitions */ 4193 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4194 if (data->count[i] < 255) { 4195 if (data->count[i] <= skip) { 4196 data->count[i] = 0; 4197 return false; 4198 } 4199 4200 data->count[i] -= skip; 4201 } 4202 4203 data->desc[i].start += skip * data->desc[i].interval; 4204 4205 return true; 4206 } 4207 4208 static bool 4209 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4210 s32 *offset) 4211 { 4212 bool ret = false; 4213 int i; 4214 4215 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4216 s32 cur; 4217 4218 if (!data->count[i]) 4219 continue; 4220 4221 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4222 ret = true; 4223 4224 cur = data->desc[i].start - tsf; 4225 if (cur > *offset) 4226 continue; 4227 4228 cur = data->desc[i].start + data->desc[i].duration - tsf; 4229 if (cur > *offset) 4230 *offset = cur; 4231 } 4232 4233 return ret; 4234 } 4235 4236 static u32 4237 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4238 { 4239 s32 offset = 0; 4240 int tries = 0; 4241 /* 4242 * arbitrary limit, used to avoid infinite loops when combined NoA 4243 * descriptors cover the full time period. 4244 */ 4245 int max_tries = 5; 4246 4247 ieee80211_extend_absent_time(data, tsf, &offset); 4248 do { 4249 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4250 break; 4251 4252 tries++; 4253 } while (tries < max_tries); 4254 4255 return offset; 4256 } 4257 4258 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4259 { 4260 u32 next_offset = BIT(31) - 1; 4261 int i; 4262 4263 data->absent = 0; 4264 data->has_next_tsf = false; 4265 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4266 s32 start; 4267 4268 if (!data->count[i]) 4269 continue; 4270 4271 ieee80211_extend_noa_desc(data, tsf, i); 4272 start = data->desc[i].start - tsf; 4273 if (start <= 0) 4274 data->absent |= BIT(i); 4275 4276 if (next_offset > start) 4277 next_offset = start; 4278 4279 data->has_next_tsf = true; 4280 } 4281 4282 if (data->absent) 4283 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4284 4285 data->next_tsf = tsf + next_offset; 4286 } 4287 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4288 4289 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4290 struct ieee80211_noa_data *data, u32 tsf) 4291 { 4292 int ret = 0; 4293 int i; 4294 4295 memset(data, 0, sizeof(*data)); 4296 4297 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4298 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4299 4300 if (!desc->count || !desc->duration) 4301 continue; 4302 4303 data->count[i] = desc->count; 4304 data->desc[i].start = le32_to_cpu(desc->start_time); 4305 data->desc[i].duration = le32_to_cpu(desc->duration); 4306 data->desc[i].interval = le32_to_cpu(desc->interval); 4307 4308 if (data->count[i] > 1 && 4309 data->desc[i].interval < data->desc[i].duration) 4310 continue; 4311 4312 ieee80211_extend_noa_desc(data, tsf, i); 4313 ret++; 4314 } 4315 4316 if (ret) 4317 ieee80211_update_p2p_noa(data, tsf); 4318 4319 return ret; 4320 } 4321 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4322 4323 void ieee80211_recalc_dtim(struct ieee80211_local *local, 4324 struct ieee80211_sub_if_data *sdata) 4325 { 4326 u64 tsf = drv_get_tsf(local, sdata); 4327 u64 dtim_count = 0; 4328 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4329 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4330 struct ps_data *ps; 4331 u8 bcns_from_dtim; 4332 4333 if (tsf == -1ULL || !beacon_int || !dtim_period) 4334 return; 4335 4336 if (sdata->vif.type == NL80211_IFTYPE_AP || 4337 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4338 if (!sdata->bss) 4339 return; 4340 4341 ps = &sdata->bss->ps; 4342 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4343 ps = &sdata->u.mesh.ps; 4344 } else { 4345 return; 4346 } 4347 4348 /* 4349 * actually finds last dtim_count, mac80211 will update in 4350 * __beacon_add_tim(). 4351 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4352 */ 4353 do_div(tsf, beacon_int); 4354 bcns_from_dtim = do_div(tsf, dtim_period); 4355 /* just had a DTIM */ 4356 if (!bcns_from_dtim) 4357 dtim_count = 0; 4358 else 4359 dtim_count = dtim_period - bcns_from_dtim; 4360 4361 ps->dtim_count = dtim_count; 4362 } 4363 4364 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4365 struct ieee80211_chanctx *ctx) 4366 { 4367 struct ieee80211_sub_if_data *sdata; 4368 u8 radar_detect = 0; 4369 4370 lockdep_assert_held(&local->chanctx_mtx); 4371 4372 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4373 return 0; 4374 4375 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 4376 if (sdata->reserved_radar_required) 4377 radar_detect |= BIT(sdata->reserved_chandef.width); 4378 4379 /* 4380 * An in-place reservation context should not have any assigned vifs 4381 * until it replaces the other context. 4382 */ 4383 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 4384 !list_empty(&ctx->assigned_vifs)); 4385 4386 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 4387 if (sdata->radar_required) 4388 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 4389 4390 return radar_detect; 4391 } 4392 4393 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4394 const struct cfg80211_chan_def *chandef, 4395 enum ieee80211_chanctx_mode chanmode, 4396 u8 radar_detect) 4397 { 4398 struct ieee80211_local *local = sdata->local; 4399 struct ieee80211_sub_if_data *sdata_iter; 4400 enum nl80211_iftype iftype = sdata->wdev.iftype; 4401 struct ieee80211_chanctx *ctx; 4402 int total = 1; 4403 struct iface_combination_params params = { 4404 .radar_detect = radar_detect, 4405 }; 4406 4407 lockdep_assert_held(&local->chanctx_mtx); 4408 4409 if (WARN_ON(hweight32(radar_detect) > 1)) 4410 return -EINVAL; 4411 4412 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4413 !chandef->chan)) 4414 return -EINVAL; 4415 4416 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4417 return -EINVAL; 4418 4419 if (sdata->vif.type == NL80211_IFTYPE_AP || 4420 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4421 /* 4422 * always passing this is harmless, since it'll be the 4423 * same value that cfg80211 finds if it finds the same 4424 * interface ... and that's always allowed 4425 */ 4426 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4427 } 4428 4429 /* Always allow software iftypes */ 4430 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4431 if (radar_detect) 4432 return -EINVAL; 4433 return 0; 4434 } 4435 4436 if (chandef) 4437 params.num_different_channels = 1; 4438 4439 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4440 params.iftype_num[iftype] = 1; 4441 4442 list_for_each_entry(ctx, &local->chanctx_list, list) { 4443 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4444 continue; 4445 params.radar_detect |= 4446 ieee80211_chanctx_radar_detect(local, ctx); 4447 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 4448 params.num_different_channels++; 4449 continue; 4450 } 4451 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4452 cfg80211_chandef_compatible(chandef, 4453 &ctx->conf.def)) 4454 continue; 4455 params.num_different_channels++; 4456 } 4457 4458 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 4459 struct wireless_dev *wdev_iter; 4460 4461 wdev_iter = &sdata_iter->wdev; 4462 4463 if (sdata_iter == sdata || 4464 !ieee80211_sdata_running(sdata_iter) || 4465 cfg80211_iftype_allowed(local->hw.wiphy, 4466 wdev_iter->iftype, 0, 1)) 4467 continue; 4468 4469 params.iftype_num[wdev_iter->iftype]++; 4470 total++; 4471 } 4472 4473 if (total == 1 && !params.radar_detect) 4474 return 0; 4475 4476 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4477 } 4478 4479 static void 4480 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4481 void *data) 4482 { 4483 u32 *max_num_different_channels = data; 4484 4485 *max_num_different_channels = max(*max_num_different_channels, 4486 c->num_different_channels); 4487 } 4488 4489 int ieee80211_max_num_channels(struct ieee80211_local *local) 4490 { 4491 struct ieee80211_sub_if_data *sdata; 4492 struct ieee80211_chanctx *ctx; 4493 u32 max_num_different_channels = 1; 4494 int err; 4495 struct iface_combination_params params = {0}; 4496 4497 lockdep_assert_held(&local->chanctx_mtx); 4498 4499 list_for_each_entry(ctx, &local->chanctx_list, list) { 4500 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4501 continue; 4502 4503 params.num_different_channels++; 4504 4505 params.radar_detect |= 4506 ieee80211_chanctx_radar_detect(local, ctx); 4507 } 4508 4509 list_for_each_entry_rcu(sdata, &local->interfaces, list) 4510 params.iftype_num[sdata->wdev.iftype]++; 4511 4512 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4513 ieee80211_iter_max_chans, 4514 &max_num_different_channels); 4515 if (err < 0) 4516 return err; 4517 4518 return max_num_different_channels; 4519 } 4520 4521 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4522 struct ieee80211_sta_s1g_cap *caps, 4523 struct sk_buff *skb) 4524 { 4525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4526 struct ieee80211_s1g_cap s1g_capab; 4527 u8 *pos; 4528 int i; 4529 4530 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4531 return; 4532 4533 if (!caps->s1g) 4534 return; 4535 4536 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4537 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4538 4539 /* override the capability info */ 4540 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4541 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4542 4543 s1g_capab.capab_info[i] &= ~mask; 4544 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4545 } 4546 4547 /* then MCS and NSS set */ 4548 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4549 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4550 4551 s1g_capab.supp_mcs_nss[i] &= ~mask; 4552 s1g_capab.supp_mcs_nss[i] |= 4553 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4554 } 4555 4556 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4557 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4558 *pos++ = sizeof(s1g_capab); 4559 4560 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4561 } 4562 4563 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4564 struct sk_buff *skb) 4565 { 4566 u8 *pos = skb_put(skb, 3); 4567 4568 *pos++ = WLAN_EID_AID_REQUEST; 4569 *pos++ = 1; 4570 *pos++ = 0; 4571 } 4572 4573 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4574 { 4575 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4576 *buf++ = 7; /* len */ 4577 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4578 *buf++ = 0x50; 4579 *buf++ = 0xf2; 4580 *buf++ = 2; /* WME */ 4581 *buf++ = 0; /* WME info */ 4582 *buf++ = 1; /* WME ver */ 4583 *buf++ = qosinfo; /* U-APSD no in use */ 4584 4585 return buf; 4586 } 4587 4588 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4589 unsigned long *frame_cnt, 4590 unsigned long *byte_cnt) 4591 { 4592 struct txq_info *txqi = to_txq_info(txq); 4593 u32 frag_cnt = 0, frag_bytes = 0; 4594 struct sk_buff *skb; 4595 4596 skb_queue_walk(&txqi->frags, skb) { 4597 frag_cnt++; 4598 frag_bytes += skb->len; 4599 } 4600 4601 if (frame_cnt) 4602 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4603 4604 if (byte_cnt) 4605 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4606 } 4607 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4608 4609 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4610 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4611 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4612 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4613 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4614 }; 4615 4616 u16 ieee80211_encode_usf(int listen_interval) 4617 { 4618 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4619 u16 ui, usf = 0; 4620 4621 /* find greatest USF */ 4622 while (usf < IEEE80211_MAX_USF) { 4623 if (listen_interval % listen_int_usf[usf + 1]) 4624 break; 4625 usf += 1; 4626 } 4627 ui = listen_interval / listen_int_usf[usf]; 4628 4629 /* error if there is a remainder. Should've been checked by user */ 4630 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4631 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4632 FIELD_PREP(LISTEN_INT_UI, ui); 4633 4634 return (u16) listen_interval; 4635 } 4636