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) 2018-2022 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->deflink.operating_11g_mode) 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->deflink.operating_11g_mode) 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->deflink.operating_11g_mode) 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 (!test_bit(SDATA_STATE_RUNNING, &sdata->state)) 305 goto out; 306 307 if (sdata->vif.type == NL80211_IFTYPE_AP) 308 ps = &sdata->bss->ps; 309 310 sdata->vif.txqs_stopped[ac] = false; 311 312 list_for_each_entry_rcu(sta, &local->sta_list, list) { 313 if (sdata != sta->sdata) 314 continue; 315 316 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 317 struct ieee80211_txq *txq = sta->sta.txq[i]; 318 319 if (!txq) 320 continue; 321 322 txqi = to_txq_info(txq); 323 324 if (ac != txq->ac) 325 continue; 326 327 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 328 &txqi->flags)) 329 continue; 330 331 spin_unlock(&fq->lock); 332 drv_wake_tx_queue(local, txqi); 333 spin_lock(&fq->lock); 334 } 335 } 336 337 if (!vif->txq) 338 goto out; 339 340 txqi = to_txq_info(vif->txq); 341 342 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 343 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 344 goto out; 345 346 spin_unlock(&fq->lock); 347 348 drv_wake_tx_queue(local, txqi); 349 local_bh_enable(); 350 return; 351 out: 352 spin_unlock(&fq->lock); 353 local_bh_enable(); 354 } 355 356 static void 357 __releases(&local->queue_stop_reason_lock) 358 __acquires(&local->queue_stop_reason_lock) 359 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 360 { 361 struct ieee80211_sub_if_data *sdata; 362 int n_acs = IEEE80211_NUM_ACS; 363 int i; 364 365 rcu_read_lock(); 366 367 if (local->hw.queues < IEEE80211_NUM_ACS) 368 n_acs = 1; 369 370 for (i = 0; i < local->hw.queues; i++) { 371 if (local->queue_stop_reasons[i]) 372 continue; 373 374 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 375 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 376 int ac; 377 378 for (ac = 0; ac < n_acs; ac++) { 379 int ac_queue = sdata->vif.hw_queue[ac]; 380 381 if (ac_queue == i || 382 sdata->vif.cab_queue == i) 383 __ieee80211_wake_txqs(sdata, ac); 384 } 385 } 386 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 387 } 388 389 rcu_read_unlock(); 390 } 391 392 void ieee80211_wake_txqs(struct tasklet_struct *t) 393 { 394 struct ieee80211_local *local = from_tasklet(local, t, 395 wake_txqs_tasklet); 396 unsigned long flags; 397 398 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 399 _ieee80211_wake_txqs(local, &flags); 400 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 401 } 402 403 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 404 { 405 struct ieee80211_sub_if_data *sdata; 406 int n_acs = IEEE80211_NUM_ACS; 407 408 if (local->ops->wake_tx_queue) 409 return; 410 411 if (local->hw.queues < IEEE80211_NUM_ACS) 412 n_acs = 1; 413 414 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 415 int ac; 416 417 if (!sdata->dev) 418 continue; 419 420 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 421 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 422 continue; 423 424 for (ac = 0; ac < n_acs; ac++) { 425 int ac_queue = sdata->vif.hw_queue[ac]; 426 427 if (ac_queue == queue || 428 (sdata->vif.cab_queue == queue && 429 local->queue_stop_reasons[ac_queue] == 0 && 430 skb_queue_empty(&local->pending[ac_queue]))) 431 netif_wake_subqueue(sdata->dev, ac); 432 } 433 } 434 } 435 436 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 437 enum queue_stop_reason reason, 438 bool refcounted, 439 unsigned long *flags) 440 { 441 struct ieee80211_local *local = hw_to_local(hw); 442 443 trace_wake_queue(local, queue, reason); 444 445 if (WARN_ON(queue >= hw->queues)) 446 return; 447 448 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 449 return; 450 451 if (!refcounted) { 452 local->q_stop_reasons[queue][reason] = 0; 453 } else { 454 local->q_stop_reasons[queue][reason]--; 455 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 456 local->q_stop_reasons[queue][reason] = 0; 457 } 458 459 if (local->q_stop_reasons[queue][reason] == 0) 460 __clear_bit(reason, &local->queue_stop_reasons[queue]); 461 462 if (local->queue_stop_reasons[queue] != 0) 463 /* someone still has this queue stopped */ 464 return; 465 466 if (skb_queue_empty(&local->pending[queue])) { 467 rcu_read_lock(); 468 ieee80211_propagate_queue_wake(local, queue); 469 rcu_read_unlock(); 470 } else 471 tasklet_schedule(&local->tx_pending_tasklet); 472 473 /* 474 * Calling _ieee80211_wake_txqs here can be a problem because it may 475 * release queue_stop_reason_lock which has been taken by 476 * __ieee80211_wake_queue's caller. It is certainly not very nice to 477 * release someone's lock, but it is fine because all the callers of 478 * __ieee80211_wake_queue call it right before releasing the lock. 479 */ 480 if (local->ops->wake_tx_queue) { 481 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 482 tasklet_schedule(&local->wake_txqs_tasklet); 483 else 484 _ieee80211_wake_txqs(local, flags); 485 } 486 } 487 488 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 489 enum queue_stop_reason reason, 490 bool refcounted) 491 { 492 struct ieee80211_local *local = hw_to_local(hw); 493 unsigned long flags; 494 495 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 496 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 497 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 498 } 499 500 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 501 { 502 ieee80211_wake_queue_by_reason(hw, queue, 503 IEEE80211_QUEUE_STOP_REASON_DRIVER, 504 false); 505 } 506 EXPORT_SYMBOL(ieee80211_wake_queue); 507 508 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 509 enum queue_stop_reason reason, 510 bool refcounted) 511 { 512 struct ieee80211_local *local = hw_to_local(hw); 513 struct ieee80211_sub_if_data *sdata; 514 int n_acs = IEEE80211_NUM_ACS; 515 516 trace_stop_queue(local, queue, reason); 517 518 if (WARN_ON(queue >= hw->queues)) 519 return; 520 521 if (!refcounted) 522 local->q_stop_reasons[queue][reason] = 1; 523 else 524 local->q_stop_reasons[queue][reason]++; 525 526 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 527 return; 528 529 if (local->hw.queues < IEEE80211_NUM_ACS) 530 n_acs = 1; 531 532 rcu_read_lock(); 533 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 534 int ac; 535 536 if (!sdata->dev) 537 continue; 538 539 for (ac = 0; ac < n_acs; ac++) { 540 if (sdata->vif.hw_queue[ac] == queue || 541 sdata->vif.cab_queue == queue) { 542 if (!local->ops->wake_tx_queue) { 543 netif_stop_subqueue(sdata->dev, ac); 544 continue; 545 } 546 spin_lock(&local->fq.lock); 547 sdata->vif.txqs_stopped[ac] = true; 548 spin_unlock(&local->fq.lock); 549 } 550 } 551 } 552 rcu_read_unlock(); 553 } 554 555 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 556 enum queue_stop_reason reason, 557 bool refcounted) 558 { 559 struct ieee80211_local *local = hw_to_local(hw); 560 unsigned long flags; 561 562 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 563 __ieee80211_stop_queue(hw, queue, reason, refcounted); 564 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 565 } 566 567 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 568 { 569 ieee80211_stop_queue_by_reason(hw, queue, 570 IEEE80211_QUEUE_STOP_REASON_DRIVER, 571 false); 572 } 573 EXPORT_SYMBOL(ieee80211_stop_queue); 574 575 void ieee80211_add_pending_skb(struct ieee80211_local *local, 576 struct sk_buff *skb) 577 { 578 struct ieee80211_hw *hw = &local->hw; 579 unsigned long flags; 580 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 581 int queue = info->hw_queue; 582 583 if (WARN_ON(!info->control.vif)) { 584 ieee80211_free_txskb(&local->hw, skb); 585 return; 586 } 587 588 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 589 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 590 false); 591 __skb_queue_tail(&local->pending[queue], skb); 592 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 593 false, &flags); 594 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 595 } 596 597 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 598 struct sk_buff_head *skbs) 599 { 600 struct ieee80211_hw *hw = &local->hw; 601 struct sk_buff *skb; 602 unsigned long flags; 603 int queue, i; 604 605 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 606 while ((skb = skb_dequeue(skbs))) { 607 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 608 609 if (WARN_ON(!info->control.vif)) { 610 ieee80211_free_txskb(&local->hw, skb); 611 continue; 612 } 613 614 queue = info->hw_queue; 615 616 __ieee80211_stop_queue(hw, queue, 617 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 618 false); 619 620 __skb_queue_tail(&local->pending[queue], skb); 621 } 622 623 for (i = 0; i < hw->queues; i++) 624 __ieee80211_wake_queue(hw, i, 625 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 626 false, &flags); 627 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 628 } 629 630 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 631 unsigned long queues, 632 enum queue_stop_reason reason, 633 bool refcounted) 634 { 635 struct ieee80211_local *local = hw_to_local(hw); 636 unsigned long flags; 637 int i; 638 639 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 640 641 for_each_set_bit(i, &queues, hw->queues) 642 __ieee80211_stop_queue(hw, i, reason, refcounted); 643 644 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 645 } 646 647 void ieee80211_stop_queues(struct ieee80211_hw *hw) 648 { 649 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 650 IEEE80211_QUEUE_STOP_REASON_DRIVER, 651 false); 652 } 653 EXPORT_SYMBOL(ieee80211_stop_queues); 654 655 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 656 { 657 struct ieee80211_local *local = hw_to_local(hw); 658 unsigned long flags; 659 int ret; 660 661 if (WARN_ON(queue >= hw->queues)) 662 return true; 663 664 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 665 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 666 &local->queue_stop_reasons[queue]); 667 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 668 return ret; 669 } 670 EXPORT_SYMBOL(ieee80211_queue_stopped); 671 672 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 673 unsigned long queues, 674 enum queue_stop_reason reason, 675 bool refcounted) 676 { 677 struct ieee80211_local *local = hw_to_local(hw); 678 unsigned long flags; 679 int i; 680 681 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 682 683 for_each_set_bit(i, &queues, hw->queues) 684 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 685 686 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 687 } 688 689 void ieee80211_wake_queues(struct ieee80211_hw *hw) 690 { 691 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 692 IEEE80211_QUEUE_STOP_REASON_DRIVER, 693 false); 694 } 695 EXPORT_SYMBOL(ieee80211_wake_queues); 696 697 static unsigned int 698 ieee80211_get_vif_queues(struct ieee80211_local *local, 699 struct ieee80211_sub_if_data *sdata) 700 { 701 unsigned int queues; 702 703 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 704 int ac; 705 706 queues = 0; 707 708 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 709 queues |= BIT(sdata->vif.hw_queue[ac]); 710 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 711 queues |= BIT(sdata->vif.cab_queue); 712 } else { 713 /* all queues */ 714 queues = BIT(local->hw.queues) - 1; 715 } 716 717 return queues; 718 } 719 720 void __ieee80211_flush_queues(struct ieee80211_local *local, 721 struct ieee80211_sub_if_data *sdata, 722 unsigned int queues, bool drop) 723 { 724 if (!local->ops->flush) 725 return; 726 727 /* 728 * If no queue was set, or if the HW doesn't support 729 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 730 */ 731 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 732 queues = ieee80211_get_vif_queues(local, sdata); 733 734 ieee80211_stop_queues_by_reason(&local->hw, queues, 735 IEEE80211_QUEUE_STOP_REASON_FLUSH, 736 false); 737 738 drv_flush(local, sdata, queues, drop); 739 740 ieee80211_wake_queues_by_reason(&local->hw, queues, 741 IEEE80211_QUEUE_STOP_REASON_FLUSH, 742 false); 743 } 744 745 void ieee80211_flush_queues(struct ieee80211_local *local, 746 struct ieee80211_sub_if_data *sdata, bool drop) 747 { 748 __ieee80211_flush_queues(local, sdata, 0, drop); 749 } 750 751 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 752 struct ieee80211_sub_if_data *sdata, 753 enum queue_stop_reason reason) 754 { 755 ieee80211_stop_queues_by_reason(&local->hw, 756 ieee80211_get_vif_queues(local, sdata), 757 reason, true); 758 } 759 760 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 761 struct ieee80211_sub_if_data *sdata, 762 enum queue_stop_reason reason) 763 { 764 ieee80211_wake_queues_by_reason(&local->hw, 765 ieee80211_get_vif_queues(local, sdata), 766 reason, true); 767 } 768 769 static void __iterate_interfaces(struct ieee80211_local *local, 770 u32 iter_flags, 771 void (*iterator)(void *data, u8 *mac, 772 struct ieee80211_vif *vif), 773 void *data) 774 { 775 struct ieee80211_sub_if_data *sdata; 776 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 777 778 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 779 switch (sdata->vif.type) { 780 case NL80211_IFTYPE_MONITOR: 781 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 782 continue; 783 break; 784 case NL80211_IFTYPE_AP_VLAN: 785 continue; 786 default: 787 break; 788 } 789 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 790 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 791 continue; 792 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 793 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 794 continue; 795 if (ieee80211_sdata_running(sdata) || !active_only) 796 iterator(data, sdata->vif.addr, 797 &sdata->vif); 798 } 799 800 sdata = rcu_dereference_check(local->monitor_sdata, 801 lockdep_is_held(&local->iflist_mtx) || 802 lockdep_is_held(&local->hw.wiphy->mtx)); 803 if (sdata && 804 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 805 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 806 iterator(data, sdata->vif.addr, &sdata->vif); 807 } 808 809 void ieee80211_iterate_interfaces( 810 struct ieee80211_hw *hw, u32 iter_flags, 811 void (*iterator)(void *data, u8 *mac, 812 struct ieee80211_vif *vif), 813 void *data) 814 { 815 struct ieee80211_local *local = hw_to_local(hw); 816 817 mutex_lock(&local->iflist_mtx); 818 __iterate_interfaces(local, iter_flags, iterator, data); 819 mutex_unlock(&local->iflist_mtx); 820 } 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 822 823 void ieee80211_iterate_active_interfaces_atomic( 824 struct ieee80211_hw *hw, u32 iter_flags, 825 void (*iterator)(void *data, u8 *mac, 826 struct ieee80211_vif *vif), 827 void *data) 828 { 829 struct ieee80211_local *local = hw_to_local(hw); 830 831 rcu_read_lock(); 832 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 833 iterator, data); 834 rcu_read_unlock(); 835 } 836 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 837 838 void ieee80211_iterate_active_interfaces_mtx( 839 struct ieee80211_hw *hw, u32 iter_flags, 840 void (*iterator)(void *data, u8 *mac, 841 struct ieee80211_vif *vif), 842 void *data) 843 { 844 struct ieee80211_local *local = hw_to_local(hw); 845 846 lockdep_assert_wiphy(hw->wiphy); 847 848 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 849 iterator, data); 850 } 851 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx); 852 853 static void __iterate_stations(struct ieee80211_local *local, 854 void (*iterator)(void *data, 855 struct ieee80211_sta *sta), 856 void *data) 857 { 858 struct sta_info *sta; 859 860 list_for_each_entry_rcu(sta, &local->sta_list, list) { 861 if (!sta->uploaded) 862 continue; 863 864 iterator(data, &sta->sta); 865 } 866 } 867 868 void ieee80211_iterate_stations(struct ieee80211_hw *hw, 869 void (*iterator)(void *data, 870 struct ieee80211_sta *sta), 871 void *data) 872 { 873 struct ieee80211_local *local = hw_to_local(hw); 874 875 mutex_lock(&local->sta_mtx); 876 __iterate_stations(local, iterator, data); 877 mutex_unlock(&local->sta_mtx); 878 } 879 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations); 880 881 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 882 void (*iterator)(void *data, 883 struct ieee80211_sta *sta), 884 void *data) 885 { 886 struct ieee80211_local *local = hw_to_local(hw); 887 888 rcu_read_lock(); 889 __iterate_stations(local, iterator, data); 890 rcu_read_unlock(); 891 } 892 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 893 894 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 895 { 896 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 897 898 if (!ieee80211_sdata_running(sdata) || 899 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 900 return NULL; 901 return &sdata->vif; 902 } 903 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 904 905 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 906 { 907 if (!vif) 908 return NULL; 909 910 return &vif_to_sdata(vif)->wdev; 911 } 912 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 913 914 /* 915 * Nothing should have been stuffed into the workqueue during 916 * the suspend->resume cycle. Since we can't check each caller 917 * of this function if we are already quiescing / suspended, 918 * check here and don't WARN since this can actually happen when 919 * the rx path (for example) is racing against __ieee80211_suspend 920 * and suspending / quiescing was set after the rx path checked 921 * them. 922 */ 923 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 924 { 925 if (local->quiescing || (local->suspended && !local->resuming)) { 926 pr_warn("queueing ieee80211 work while going to suspend\n"); 927 return false; 928 } 929 930 return true; 931 } 932 933 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 934 { 935 struct ieee80211_local *local = hw_to_local(hw); 936 937 if (!ieee80211_can_queue_work(local)) 938 return; 939 940 queue_work(local->workqueue, work); 941 } 942 EXPORT_SYMBOL(ieee80211_queue_work); 943 944 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 945 struct delayed_work *dwork, 946 unsigned long delay) 947 { 948 struct ieee80211_local *local = hw_to_local(hw); 949 950 if (!ieee80211_can_queue_work(local)) 951 return; 952 953 queue_delayed_work(local->workqueue, dwork, delay); 954 } 955 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 956 957 static void 958 ieee80211_parse_extension_element(u32 *crc, 959 const struct element *elem, 960 struct ieee802_11_elems *elems, 961 struct ieee80211_elems_parse_params *params) 962 { 963 const void *data = elem->data + 1; 964 u8 len; 965 966 if (!elem->datalen) 967 return; 968 969 len = elem->datalen - 1; 970 971 switch (elem->data[0]) { 972 case WLAN_EID_EXT_HE_MU_EDCA: 973 if (len >= sizeof(*elems->mu_edca_param_set)) { 974 elems->mu_edca_param_set = data; 975 if (crc) 976 *crc = crc32_be(*crc, (void *)elem, 977 elem->datalen + 2); 978 } 979 break; 980 case WLAN_EID_EXT_HE_CAPABILITY: 981 if (ieee80211_he_capa_size_ok(data, len)) { 982 elems->he_cap = data; 983 elems->he_cap_len = len; 984 } 985 break; 986 case WLAN_EID_EXT_HE_OPERATION: 987 if (len >= sizeof(*elems->he_operation) && 988 len >= ieee80211_he_oper_size(data) - 1) { 989 if (crc) 990 *crc = crc32_be(*crc, (void *)elem, 991 elem->datalen + 2); 992 elems->he_operation = data; 993 } 994 break; 995 case WLAN_EID_EXT_UORA: 996 if (len >= 1) 997 elems->uora_element = data; 998 break; 999 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 1000 if (len == 3) 1001 elems->max_channel_switch_time = data; 1002 break; 1003 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 1004 if (len >= sizeof(*elems->mbssid_config_ie)) 1005 elems->mbssid_config_ie = data; 1006 break; 1007 case WLAN_EID_EXT_HE_SPR: 1008 if (len >= sizeof(*elems->he_spr) && 1009 len >= ieee80211_he_spr_size(data)) 1010 elems->he_spr = data; 1011 break; 1012 case WLAN_EID_EXT_HE_6GHZ_CAPA: 1013 if (len >= sizeof(*elems->he_6ghz_capa)) 1014 elems->he_6ghz_capa = data; 1015 break; 1016 case WLAN_EID_EXT_EHT_CAPABILITY: 1017 if (ieee80211_eht_capa_size_ok(elems->he_cap, 1018 data, len, 1019 params->from_ap)) { 1020 elems->eht_cap = data; 1021 elems->eht_cap_len = len; 1022 } 1023 break; 1024 case WLAN_EID_EXT_EHT_OPERATION: 1025 if (ieee80211_eht_oper_size_ok(data, len)) 1026 elems->eht_operation = data; 1027 break; 1028 case WLAN_EID_EXT_EHT_MULTI_LINK: 1029 if (ieee80211_mle_size_ok(data, len)) 1030 elems->multi_link = (void *)data; 1031 break; 1032 } 1033 } 1034 1035 static u32 1036 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params, 1037 struct ieee802_11_elems *elems, 1038 const struct element *check_inherit) 1039 { 1040 const struct element *elem; 1041 bool calc_crc = params->filter != 0; 1042 DECLARE_BITMAP(seen_elems, 256); 1043 u32 crc = params->crc; 1044 const u8 *ie; 1045 1046 bitmap_zero(seen_elems, 256); 1047 1048 for_each_element(elem, params->start, params->len) { 1049 bool elem_parse_failed; 1050 u8 id = elem->id; 1051 u8 elen = elem->datalen; 1052 const u8 *pos = elem->data; 1053 1054 if (check_inherit && 1055 !cfg80211_is_element_inherited(elem, 1056 check_inherit)) 1057 continue; 1058 1059 switch (id) { 1060 case WLAN_EID_SSID: 1061 case WLAN_EID_SUPP_RATES: 1062 case WLAN_EID_FH_PARAMS: 1063 case WLAN_EID_DS_PARAMS: 1064 case WLAN_EID_CF_PARAMS: 1065 case WLAN_EID_TIM: 1066 case WLAN_EID_IBSS_PARAMS: 1067 case WLAN_EID_CHALLENGE: 1068 case WLAN_EID_RSN: 1069 case WLAN_EID_ERP_INFO: 1070 case WLAN_EID_EXT_SUPP_RATES: 1071 case WLAN_EID_HT_CAPABILITY: 1072 case WLAN_EID_HT_OPERATION: 1073 case WLAN_EID_VHT_CAPABILITY: 1074 case WLAN_EID_VHT_OPERATION: 1075 case WLAN_EID_MESH_ID: 1076 case WLAN_EID_MESH_CONFIG: 1077 case WLAN_EID_PEER_MGMT: 1078 case WLAN_EID_PREQ: 1079 case WLAN_EID_PREP: 1080 case WLAN_EID_PERR: 1081 case WLAN_EID_RANN: 1082 case WLAN_EID_CHANNEL_SWITCH: 1083 case WLAN_EID_EXT_CHANSWITCH_ANN: 1084 case WLAN_EID_COUNTRY: 1085 case WLAN_EID_PWR_CONSTRAINT: 1086 case WLAN_EID_TIMEOUT_INTERVAL: 1087 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1088 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1089 case WLAN_EID_CHAN_SWITCH_PARAM: 1090 case WLAN_EID_EXT_CAPABILITY: 1091 case WLAN_EID_CHAN_SWITCH_TIMING: 1092 case WLAN_EID_LINK_ID: 1093 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1094 case WLAN_EID_RSNX: 1095 case WLAN_EID_S1G_BCN_COMPAT: 1096 case WLAN_EID_S1G_CAPABILITIES: 1097 case WLAN_EID_S1G_OPERATION: 1098 case WLAN_EID_AID_RESPONSE: 1099 case WLAN_EID_S1G_SHORT_BCN_INTERVAL: 1100 /* 1101 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1102 * that if the content gets bigger it might be needed more than once 1103 */ 1104 if (test_bit(id, seen_elems)) { 1105 elems->parse_error = true; 1106 continue; 1107 } 1108 break; 1109 } 1110 1111 if (calc_crc && id < 64 && (params->filter & (1ULL << id))) 1112 crc = crc32_be(crc, pos - 2, elen + 2); 1113 1114 elem_parse_failed = false; 1115 1116 switch (id) { 1117 case WLAN_EID_LINK_ID: 1118 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) { 1119 elem_parse_failed = true; 1120 break; 1121 } 1122 elems->lnk_id = (void *)(pos - 2); 1123 break; 1124 case WLAN_EID_CHAN_SWITCH_TIMING: 1125 if (elen < sizeof(struct ieee80211_ch_switch_timing)) { 1126 elem_parse_failed = true; 1127 break; 1128 } 1129 elems->ch_sw_timing = (void *)pos; 1130 break; 1131 case WLAN_EID_EXT_CAPABILITY: 1132 elems->ext_capab = pos; 1133 elems->ext_capab_len = elen; 1134 break; 1135 case WLAN_EID_SSID: 1136 elems->ssid = pos; 1137 elems->ssid_len = elen; 1138 break; 1139 case WLAN_EID_SUPP_RATES: 1140 elems->supp_rates = pos; 1141 elems->supp_rates_len = elen; 1142 break; 1143 case WLAN_EID_DS_PARAMS: 1144 if (elen >= 1) 1145 elems->ds_params = pos; 1146 else 1147 elem_parse_failed = true; 1148 break; 1149 case WLAN_EID_TIM: 1150 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1151 elems->tim = (void *)pos; 1152 elems->tim_len = elen; 1153 } else 1154 elem_parse_failed = true; 1155 break; 1156 case WLAN_EID_VENDOR_SPECIFIC: 1157 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1158 pos[2] == 0xf2) { 1159 /* Microsoft OUI (00:50:F2) */ 1160 1161 if (calc_crc) 1162 crc = crc32_be(crc, pos - 2, elen + 2); 1163 1164 if (elen >= 5 && pos[3] == 2) { 1165 /* OUI Type 2 - WMM IE */ 1166 if (pos[4] == 0) { 1167 elems->wmm_info = pos; 1168 elems->wmm_info_len = elen; 1169 } else if (pos[4] == 1) { 1170 elems->wmm_param = pos; 1171 elems->wmm_param_len = elen; 1172 } 1173 } 1174 } 1175 break; 1176 case WLAN_EID_RSN: 1177 elems->rsn = pos; 1178 elems->rsn_len = elen; 1179 break; 1180 case WLAN_EID_ERP_INFO: 1181 if (elen >= 1) 1182 elems->erp_info = pos; 1183 else 1184 elem_parse_failed = true; 1185 break; 1186 case WLAN_EID_EXT_SUPP_RATES: 1187 elems->ext_supp_rates = pos; 1188 elems->ext_supp_rates_len = elen; 1189 break; 1190 case WLAN_EID_HT_CAPABILITY: 1191 if (elen >= sizeof(struct ieee80211_ht_cap)) 1192 elems->ht_cap_elem = (void *)pos; 1193 else 1194 elem_parse_failed = true; 1195 break; 1196 case WLAN_EID_HT_OPERATION: 1197 if (elen >= sizeof(struct ieee80211_ht_operation)) 1198 elems->ht_operation = (void *)pos; 1199 else 1200 elem_parse_failed = true; 1201 break; 1202 case WLAN_EID_VHT_CAPABILITY: 1203 if (elen >= sizeof(struct ieee80211_vht_cap)) 1204 elems->vht_cap_elem = (void *)pos; 1205 else 1206 elem_parse_failed = true; 1207 break; 1208 case WLAN_EID_VHT_OPERATION: 1209 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1210 elems->vht_operation = (void *)pos; 1211 if (calc_crc) 1212 crc = crc32_be(crc, pos - 2, elen + 2); 1213 break; 1214 } 1215 elem_parse_failed = true; 1216 break; 1217 case WLAN_EID_OPMODE_NOTIF: 1218 if (elen > 0) { 1219 elems->opmode_notif = pos; 1220 if (calc_crc) 1221 crc = crc32_be(crc, pos - 2, elen + 2); 1222 break; 1223 } 1224 elem_parse_failed = true; 1225 break; 1226 case WLAN_EID_MESH_ID: 1227 elems->mesh_id = pos; 1228 elems->mesh_id_len = elen; 1229 break; 1230 case WLAN_EID_MESH_CONFIG: 1231 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1232 elems->mesh_config = (void *)pos; 1233 else 1234 elem_parse_failed = true; 1235 break; 1236 case WLAN_EID_PEER_MGMT: 1237 elems->peering = pos; 1238 elems->peering_len = elen; 1239 break; 1240 case WLAN_EID_MESH_AWAKE_WINDOW: 1241 if (elen >= 2) 1242 elems->awake_window = (void *)pos; 1243 break; 1244 case WLAN_EID_PREQ: 1245 elems->preq = pos; 1246 elems->preq_len = elen; 1247 break; 1248 case WLAN_EID_PREP: 1249 elems->prep = pos; 1250 elems->prep_len = elen; 1251 break; 1252 case WLAN_EID_PERR: 1253 elems->perr = pos; 1254 elems->perr_len = elen; 1255 break; 1256 case WLAN_EID_RANN: 1257 if (elen >= sizeof(struct ieee80211_rann_ie)) 1258 elems->rann = (void *)pos; 1259 else 1260 elem_parse_failed = true; 1261 break; 1262 case WLAN_EID_CHANNEL_SWITCH: 1263 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1264 elem_parse_failed = true; 1265 break; 1266 } 1267 elems->ch_switch_ie = (void *)pos; 1268 break; 1269 case WLAN_EID_EXT_CHANSWITCH_ANN: 1270 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1271 elem_parse_failed = true; 1272 break; 1273 } 1274 elems->ext_chansw_ie = (void *)pos; 1275 break; 1276 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1277 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1278 elem_parse_failed = true; 1279 break; 1280 } 1281 elems->sec_chan_offs = (void *)pos; 1282 break; 1283 case WLAN_EID_CHAN_SWITCH_PARAM: 1284 if (elen < 1285 sizeof(*elems->mesh_chansw_params_ie)) { 1286 elem_parse_failed = true; 1287 break; 1288 } 1289 elems->mesh_chansw_params_ie = (void *)pos; 1290 break; 1291 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1292 if (!params->action || 1293 elen < sizeof(*elems->wide_bw_chansw_ie)) { 1294 elem_parse_failed = true; 1295 break; 1296 } 1297 elems->wide_bw_chansw_ie = (void *)pos; 1298 break; 1299 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1300 if (params->action) { 1301 elem_parse_failed = true; 1302 break; 1303 } 1304 /* 1305 * This is a bit tricky, but as we only care about 1306 * the wide bandwidth channel switch element, so 1307 * just parse it out manually. 1308 */ 1309 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1310 pos, elen); 1311 if (ie) { 1312 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie)) 1313 elems->wide_bw_chansw_ie = 1314 (void *)(ie + 2); 1315 else 1316 elem_parse_failed = true; 1317 } 1318 break; 1319 case WLAN_EID_COUNTRY: 1320 elems->country_elem = pos; 1321 elems->country_elem_len = elen; 1322 break; 1323 case WLAN_EID_PWR_CONSTRAINT: 1324 if (elen != 1) { 1325 elem_parse_failed = true; 1326 break; 1327 } 1328 elems->pwr_constr_elem = pos; 1329 break; 1330 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1331 /* Lots of different options exist, but we only care 1332 * about the Dynamic Transmit Power Control element. 1333 * First check for the Cisco OUI, then for the DTPC 1334 * tag (0x00). 1335 */ 1336 if (elen < 4) { 1337 elem_parse_failed = true; 1338 break; 1339 } 1340 1341 if (pos[0] != 0x00 || pos[1] != 0x40 || 1342 pos[2] != 0x96 || pos[3] != 0x00) 1343 break; 1344 1345 if (elen != 6) { 1346 elem_parse_failed = true; 1347 break; 1348 } 1349 1350 if (calc_crc) 1351 crc = crc32_be(crc, pos - 2, elen + 2); 1352 1353 elems->cisco_dtpc_elem = pos; 1354 break; 1355 case WLAN_EID_ADDBA_EXT: 1356 if (elen < sizeof(struct ieee80211_addba_ext_ie)) { 1357 elem_parse_failed = true; 1358 break; 1359 } 1360 elems->addba_ext_ie = (void *)pos; 1361 break; 1362 case WLAN_EID_TIMEOUT_INTERVAL: 1363 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1364 elems->timeout_int = (void *)pos; 1365 else 1366 elem_parse_failed = true; 1367 break; 1368 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1369 if (elen >= sizeof(*elems->max_idle_period_ie)) 1370 elems->max_idle_period_ie = (void *)pos; 1371 break; 1372 case WLAN_EID_RSNX: 1373 elems->rsnx = pos; 1374 elems->rsnx_len = elen; 1375 break; 1376 case WLAN_EID_TX_POWER_ENVELOPE: 1377 if (elen < 1 || 1378 elen > sizeof(struct ieee80211_tx_pwr_env)) 1379 break; 1380 1381 if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env)) 1382 break; 1383 1384 elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos; 1385 elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen; 1386 elems->tx_pwr_env_num++; 1387 break; 1388 case WLAN_EID_EXTENSION: 1389 ieee80211_parse_extension_element(calc_crc ? 1390 &crc : NULL, 1391 elem, elems, params); 1392 break; 1393 case WLAN_EID_S1G_CAPABILITIES: 1394 if (elen >= sizeof(*elems->s1g_capab)) 1395 elems->s1g_capab = (void *)pos; 1396 else 1397 elem_parse_failed = true; 1398 break; 1399 case WLAN_EID_S1G_OPERATION: 1400 if (elen == sizeof(*elems->s1g_oper)) 1401 elems->s1g_oper = (void *)pos; 1402 else 1403 elem_parse_failed = true; 1404 break; 1405 case WLAN_EID_S1G_BCN_COMPAT: 1406 if (elen == sizeof(*elems->s1g_bcn_compat)) 1407 elems->s1g_bcn_compat = (void *)pos; 1408 else 1409 elem_parse_failed = true; 1410 break; 1411 case WLAN_EID_AID_RESPONSE: 1412 if (elen == sizeof(struct ieee80211_aid_response_ie)) 1413 elems->aid_resp = (void *)pos; 1414 else 1415 elem_parse_failed = true; 1416 break; 1417 default: 1418 break; 1419 } 1420 1421 if (elem_parse_failed) 1422 elems->parse_error = true; 1423 else 1424 __set_bit(id, seen_elems); 1425 } 1426 1427 if (!for_each_element_completed(elem, params->start, params->len)) 1428 elems->parse_error = true; 1429 1430 return crc; 1431 } 1432 1433 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1434 struct ieee802_11_elems *elems, 1435 struct cfg80211_bss *bss, 1436 u8 *nontransmitted_profile) 1437 { 1438 const struct element *elem, *sub; 1439 size_t profile_len = 0; 1440 bool found = false; 1441 1442 if (!bss || !bss->transmitted_bss) 1443 return profile_len; 1444 1445 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1446 if (elem->datalen < 2) 1447 continue; 1448 1449 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1450 u8 new_bssid[ETH_ALEN]; 1451 const u8 *index; 1452 1453 if (sub->id != 0 || sub->datalen < 4) { 1454 /* not a valid BSS profile */ 1455 continue; 1456 } 1457 1458 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1459 sub->data[1] != 2) { 1460 /* The first element of the 1461 * Nontransmitted BSSID Profile is not 1462 * the Nontransmitted BSSID Capability 1463 * element. 1464 */ 1465 continue; 1466 } 1467 1468 memset(nontransmitted_profile, 0, len); 1469 profile_len = cfg80211_merge_profile(start, len, 1470 elem, 1471 sub, 1472 nontransmitted_profile, 1473 len); 1474 1475 /* found a Nontransmitted BSSID Profile */ 1476 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1477 nontransmitted_profile, 1478 profile_len); 1479 if (!index || index[1] < 1 || index[2] == 0) { 1480 /* Invalid MBSSID Index element */ 1481 continue; 1482 } 1483 1484 cfg80211_gen_new_bssid(bss->transmitted_bss->bssid, 1485 elem->data[0], 1486 index[2], 1487 new_bssid); 1488 if (ether_addr_equal(new_bssid, bss->bssid)) { 1489 found = true; 1490 elems->bssid_index_len = index[1]; 1491 elems->bssid_index = (void *)&index[2]; 1492 break; 1493 } 1494 } 1495 } 1496 1497 return found ? profile_len : 0; 1498 } 1499 1500 struct ieee802_11_elems * 1501 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params) 1502 { 1503 struct ieee802_11_elems *elems; 1504 const struct element *non_inherit = NULL; 1505 u8 *nontransmitted_profile; 1506 int nontransmitted_profile_len = 0; 1507 1508 elems = kzalloc(sizeof(*elems), GFP_ATOMIC); 1509 if (!elems) 1510 return NULL; 1511 elems->ie_start = params->start; 1512 elems->total_len = params->len; 1513 1514 nontransmitted_profile = kmalloc(params->len, GFP_ATOMIC); 1515 if (nontransmitted_profile) { 1516 nontransmitted_profile_len = 1517 ieee802_11_find_bssid_profile(params->start, params->len, 1518 elems, params->bss, 1519 nontransmitted_profile); 1520 non_inherit = 1521 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1522 nontransmitted_profile, 1523 nontransmitted_profile_len); 1524 } 1525 1526 elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit); 1527 1528 /* Override with nontransmitted profile, if found */ 1529 if (nontransmitted_profile_len) { 1530 struct ieee80211_elems_parse_params sub = { 1531 .start = nontransmitted_profile, 1532 .len = nontransmitted_profile_len, 1533 .action = params->action, 1534 .link_id = params->link_id, 1535 }; 1536 1537 _ieee802_11_parse_elems_full(&sub, elems, NULL); 1538 } 1539 1540 if (elems->tim && !elems->parse_error) { 1541 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1542 1543 elems->dtim_period = tim_ie->dtim_period; 1544 elems->dtim_count = tim_ie->dtim_count; 1545 } 1546 1547 /* Override DTIM period and count if needed */ 1548 if (elems->bssid_index && 1549 elems->bssid_index_len >= 1550 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1551 elems->dtim_period = elems->bssid_index->dtim_period; 1552 1553 if (elems->bssid_index && 1554 elems->bssid_index_len >= 1555 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1556 elems->dtim_count = elems->bssid_index->dtim_count; 1557 1558 kfree(nontransmitted_profile); 1559 1560 return elems; 1561 } 1562 1563 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1564 struct ieee80211_tx_queue_params 1565 *qparam, int ac) 1566 { 1567 struct ieee80211_chanctx_conf *chanctx_conf; 1568 const struct ieee80211_reg_rule *rrule; 1569 const struct ieee80211_wmm_ac *wmm_ac; 1570 u16 center_freq = 0; 1571 1572 if (sdata->vif.type != NL80211_IFTYPE_AP && 1573 sdata->vif.type != NL80211_IFTYPE_STATION) 1574 return; 1575 1576 rcu_read_lock(); 1577 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1578 if (chanctx_conf) 1579 center_freq = chanctx_conf->def.chan->center_freq; 1580 1581 if (!center_freq) { 1582 rcu_read_unlock(); 1583 return; 1584 } 1585 1586 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1587 1588 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1589 rcu_read_unlock(); 1590 return; 1591 } 1592 1593 if (sdata->vif.type == NL80211_IFTYPE_AP) 1594 wmm_ac = &rrule->wmm_rule.ap[ac]; 1595 else 1596 wmm_ac = &rrule->wmm_rule.client[ac]; 1597 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1598 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1599 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1600 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1601 rcu_read_unlock(); 1602 } 1603 1604 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1605 bool bss_notify, bool enable_qos) 1606 { 1607 struct ieee80211_sub_if_data *sdata = link->sdata; 1608 struct ieee80211_local *local = sdata->local; 1609 struct ieee80211_tx_queue_params qparam; 1610 struct ieee80211_chanctx_conf *chanctx_conf; 1611 int ac; 1612 bool use_11b; 1613 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1614 int aCWmin, aCWmax; 1615 1616 if (!local->ops->conf_tx) 1617 return; 1618 1619 if (local->hw.queues < IEEE80211_NUM_ACS) 1620 return; 1621 1622 memset(&qparam, 0, sizeof(qparam)); 1623 1624 rcu_read_lock(); 1625 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1626 use_11b = (chanctx_conf && 1627 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1628 !link->operating_11g_mode; 1629 rcu_read_unlock(); 1630 1631 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1632 1633 /* Set defaults according to 802.11-2007 Table 7-37 */ 1634 aCWmax = 1023; 1635 if (use_11b) 1636 aCWmin = 31; 1637 else 1638 aCWmin = 15; 1639 1640 /* Confiure old 802.11b/g medium access rules. */ 1641 qparam.cw_max = aCWmax; 1642 qparam.cw_min = aCWmin; 1643 qparam.txop = 0; 1644 qparam.aifs = 2; 1645 1646 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1647 /* Update if QoS is enabled. */ 1648 if (enable_qos) { 1649 switch (ac) { 1650 case IEEE80211_AC_BK: 1651 qparam.cw_max = aCWmax; 1652 qparam.cw_min = aCWmin; 1653 qparam.txop = 0; 1654 if (is_ocb) 1655 qparam.aifs = 9; 1656 else 1657 qparam.aifs = 7; 1658 break; 1659 /* never happens but let's not leave undefined */ 1660 default: 1661 case IEEE80211_AC_BE: 1662 qparam.cw_max = aCWmax; 1663 qparam.cw_min = aCWmin; 1664 qparam.txop = 0; 1665 if (is_ocb) 1666 qparam.aifs = 6; 1667 else 1668 qparam.aifs = 3; 1669 break; 1670 case IEEE80211_AC_VI: 1671 qparam.cw_max = aCWmin; 1672 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1673 if (is_ocb) 1674 qparam.txop = 0; 1675 else if (use_11b) 1676 qparam.txop = 6016/32; 1677 else 1678 qparam.txop = 3008/32; 1679 1680 if (is_ocb) 1681 qparam.aifs = 3; 1682 else 1683 qparam.aifs = 2; 1684 break; 1685 case IEEE80211_AC_VO: 1686 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1687 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1688 if (is_ocb) 1689 qparam.txop = 0; 1690 else if (use_11b) 1691 qparam.txop = 3264/32; 1692 else 1693 qparam.txop = 1504/32; 1694 qparam.aifs = 2; 1695 break; 1696 } 1697 } 1698 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1699 1700 qparam.uapsd = false; 1701 1702 link->tx_conf[ac] = qparam; 1703 drv_conf_tx(local, link, ac, &qparam); 1704 } 1705 1706 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1707 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1708 sdata->vif.type != NL80211_IFTYPE_NAN) { 1709 link->conf->qos = enable_qos; 1710 if (bss_notify) 1711 ieee80211_link_info_change_notify(sdata, link, 1712 BSS_CHANGED_QOS); 1713 } 1714 } 1715 1716 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1717 u16 transaction, u16 auth_alg, u16 status, 1718 const u8 *extra, size_t extra_len, const u8 *da, 1719 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1720 u32 tx_flags) 1721 { 1722 struct ieee80211_local *local = sdata->local; 1723 struct sk_buff *skb; 1724 struct ieee80211_mgmt *mgmt; 1725 bool multi_link = sdata->vif.valid_links; 1726 struct { 1727 u8 id; 1728 u8 len; 1729 u8 ext_id; 1730 struct ieee80211_multi_link_elem ml; 1731 struct ieee80211_mle_basic_common_info basic; 1732 } __packed mle = { 1733 .id = WLAN_EID_EXTENSION, 1734 .len = sizeof(mle) - 2, 1735 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1736 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1737 .basic.len = sizeof(mle.basic), 1738 }; 1739 int err; 1740 1741 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1742 1743 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1744 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1745 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1746 multi_link * sizeof(mle)); 1747 if (!skb) 1748 return; 1749 1750 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1751 1752 mgmt = skb_put_zero(skb, 24 + 6); 1753 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1754 IEEE80211_STYPE_AUTH); 1755 memcpy(mgmt->da, da, ETH_ALEN); 1756 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1757 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1758 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1759 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1760 mgmt->u.auth.status_code = cpu_to_le16(status); 1761 if (extra) 1762 skb_put_data(skb, extra, extra_len); 1763 if (multi_link) 1764 skb_put_data(skb, &mle, sizeof(mle)); 1765 1766 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1767 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1768 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1769 if (WARN_ON(err)) { 1770 kfree_skb(skb); 1771 return; 1772 } 1773 } 1774 1775 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1776 tx_flags; 1777 ieee80211_tx_skb(sdata, skb); 1778 } 1779 1780 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1781 const u8 *da, const u8 *bssid, 1782 u16 stype, u16 reason, 1783 bool send_frame, u8 *frame_buf) 1784 { 1785 struct ieee80211_local *local = sdata->local; 1786 struct sk_buff *skb; 1787 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1788 1789 /* build frame */ 1790 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1791 mgmt->duration = 0; /* initialize only */ 1792 mgmt->seq_ctrl = 0; /* initialize only */ 1793 memcpy(mgmt->da, da, ETH_ALEN); 1794 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1795 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1796 /* u.deauth.reason_code == u.disassoc.reason_code */ 1797 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1798 1799 if (send_frame) { 1800 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1801 IEEE80211_DEAUTH_FRAME_LEN); 1802 if (!skb) 1803 return; 1804 1805 skb_reserve(skb, local->hw.extra_tx_headroom); 1806 1807 /* copy in frame */ 1808 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1809 1810 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1811 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1812 IEEE80211_SKB_CB(skb)->flags |= 1813 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1814 1815 ieee80211_tx_skb(sdata, skb); 1816 } 1817 } 1818 1819 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end) 1820 { 1821 if ((end - pos) < 5) 1822 return pos; 1823 1824 *pos++ = WLAN_EID_EXTENSION; 1825 *pos++ = 1 + sizeof(cap); 1826 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA; 1827 memcpy(pos, &cap, sizeof(cap)); 1828 1829 return pos + 2; 1830 } 1831 1832 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata, 1833 u8 *buffer, size_t buffer_len, 1834 const u8 *ie, size_t ie_len, 1835 enum nl80211_band band, 1836 u32 rate_mask, 1837 struct cfg80211_chan_def *chandef, 1838 size_t *offset, u32 flags) 1839 { 1840 struct ieee80211_local *local = sdata->local; 1841 struct ieee80211_supported_band *sband; 1842 const struct ieee80211_sta_he_cap *he_cap; 1843 const struct ieee80211_sta_eht_cap *eht_cap; 1844 u8 *pos = buffer, *end = buffer + buffer_len; 1845 size_t noffset; 1846 int supp_rates_len, i; 1847 u8 rates[32]; 1848 int num_rates; 1849 int ext_rates_len; 1850 int shift; 1851 u32 rate_flags; 1852 bool have_80mhz = false; 1853 1854 *offset = 0; 1855 1856 sband = local->hw.wiphy->bands[band]; 1857 if (WARN_ON_ONCE(!sband)) 1858 return 0; 1859 1860 rate_flags = ieee80211_chandef_rate_flags(chandef); 1861 shift = ieee80211_chandef_get_shift(chandef); 1862 1863 num_rates = 0; 1864 for (i = 0; i < sband->n_bitrates; i++) { 1865 if ((BIT(i) & rate_mask) == 0) 1866 continue; /* skip rate */ 1867 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1868 continue; 1869 1870 rates[num_rates++] = 1871 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1872 (1 << shift) * 5); 1873 } 1874 1875 supp_rates_len = min_t(int, num_rates, 8); 1876 1877 if (end - pos < 2 + supp_rates_len) 1878 goto out_err; 1879 *pos++ = WLAN_EID_SUPP_RATES; 1880 *pos++ = supp_rates_len; 1881 memcpy(pos, rates, supp_rates_len); 1882 pos += supp_rates_len; 1883 1884 /* insert "request information" if in custom IEs */ 1885 if (ie && ie_len) { 1886 static const u8 before_extrates[] = { 1887 WLAN_EID_SSID, 1888 WLAN_EID_SUPP_RATES, 1889 WLAN_EID_REQUEST, 1890 }; 1891 noffset = ieee80211_ie_split(ie, ie_len, 1892 before_extrates, 1893 ARRAY_SIZE(before_extrates), 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 ext_rates_len = num_rates - supp_rates_len; 1903 if (ext_rates_len > 0) { 1904 if (end - pos < 2 + ext_rates_len) 1905 goto out_err; 1906 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1907 *pos++ = ext_rates_len; 1908 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1909 pos += ext_rates_len; 1910 } 1911 1912 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1913 if (end - pos < 3) 1914 goto out_err; 1915 *pos++ = WLAN_EID_DS_PARAMS; 1916 *pos++ = 1; 1917 *pos++ = ieee80211_frequency_to_channel( 1918 chandef->chan->center_freq); 1919 } 1920 1921 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1922 goto done; 1923 1924 /* insert custom IEs that go before HT */ 1925 if (ie && ie_len) { 1926 static const u8 before_ht[] = { 1927 /* 1928 * no need to list the ones split off already 1929 * (or generated here) 1930 */ 1931 WLAN_EID_DS_PARAMS, 1932 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1933 }; 1934 noffset = ieee80211_ie_split(ie, ie_len, 1935 before_ht, ARRAY_SIZE(before_ht), 1936 *offset); 1937 if (end - pos < noffset - *offset) 1938 goto out_err; 1939 memcpy(pos, ie + *offset, noffset - *offset); 1940 pos += noffset - *offset; 1941 *offset = noffset; 1942 } 1943 1944 if (sband->ht_cap.ht_supported) { 1945 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1946 goto out_err; 1947 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1948 sband->ht_cap.cap); 1949 } 1950 1951 /* insert custom IEs that go before VHT */ 1952 if (ie && ie_len) { 1953 static const u8 before_vht[] = { 1954 /* 1955 * no need to list the ones split off already 1956 * (or generated here) 1957 */ 1958 WLAN_EID_BSS_COEX_2040, 1959 WLAN_EID_EXT_CAPABILITY, 1960 WLAN_EID_SSID_LIST, 1961 WLAN_EID_CHANNEL_USAGE, 1962 WLAN_EID_INTERWORKING, 1963 WLAN_EID_MESH_ID, 1964 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1965 }; 1966 noffset = ieee80211_ie_split(ie, ie_len, 1967 before_vht, ARRAY_SIZE(before_vht), 1968 *offset); 1969 if (end - pos < noffset - *offset) 1970 goto out_err; 1971 memcpy(pos, ie + *offset, noffset - *offset); 1972 pos += noffset - *offset; 1973 *offset = noffset; 1974 } 1975 1976 /* Check if any channel in this sband supports at least 80 MHz */ 1977 for (i = 0; i < sband->n_channels; i++) { 1978 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1979 IEEE80211_CHAN_NO_80MHZ)) 1980 continue; 1981 1982 have_80mhz = true; 1983 break; 1984 } 1985 1986 if (sband->vht_cap.vht_supported && have_80mhz) { 1987 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1988 goto out_err; 1989 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1990 sband->vht_cap.cap); 1991 } 1992 1993 /* insert custom IEs that go before HE */ 1994 if (ie && ie_len) { 1995 static const u8 before_he[] = { 1996 /* 1997 * no need to list the ones split off before VHT 1998 * or generated here 1999 */ 2000 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 2001 WLAN_EID_AP_CSN, 2002 /* TODO: add 11ah/11aj/11ak elements */ 2003 }; 2004 noffset = ieee80211_ie_split(ie, ie_len, 2005 before_he, ARRAY_SIZE(before_he), 2006 *offset); 2007 if (end - pos < noffset - *offset) 2008 goto out_err; 2009 memcpy(pos, ie + *offset, noffset - *offset); 2010 pos += noffset - *offset; 2011 *offset = noffset; 2012 } 2013 2014 he_cap = ieee80211_get_he_iftype_cap(sband, 2015 ieee80211_vif_type_p2p(&sdata->vif)); 2016 if (he_cap && 2017 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2018 IEEE80211_CHAN_NO_HE)) { 2019 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end); 2020 if (!pos) 2021 goto out_err; 2022 } 2023 2024 eht_cap = ieee80211_get_eht_iftype_cap(sband, 2025 ieee80211_vif_type_p2p(&sdata->vif)); 2026 2027 if (eht_cap && 2028 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2029 IEEE80211_CHAN_NO_HE | 2030 IEEE80211_CHAN_NO_EHT)) { 2031 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end, 2032 sdata->vif.type == NL80211_IFTYPE_AP); 2033 if (!pos) 2034 goto out_err; 2035 } 2036 2037 if (cfg80211_any_usable_channels(local->hw.wiphy, 2038 BIT(NL80211_BAND_6GHZ), 2039 IEEE80211_CHAN_NO_HE)) { 2040 struct ieee80211_supported_band *sband6; 2041 2042 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2043 he_cap = ieee80211_get_he_iftype_cap(sband6, 2044 ieee80211_vif_type_p2p(&sdata->vif)); 2045 2046 if (he_cap) { 2047 enum nl80211_iftype iftype = 2048 ieee80211_vif_type_p2p(&sdata->vif); 2049 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype); 2050 2051 pos = ieee80211_write_he_6ghz_cap(pos, cap, end); 2052 } 2053 } 2054 2055 /* 2056 * If adding more here, adjust code in main.c 2057 * that calculates local->scan_ies_len. 2058 */ 2059 2060 return pos - buffer; 2061 out_err: 2062 WARN_ONCE(1, "not enough space for preq IEs\n"); 2063 done: 2064 return pos - buffer; 2065 } 2066 2067 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 2068 size_t buffer_len, 2069 struct ieee80211_scan_ies *ie_desc, 2070 const u8 *ie, size_t ie_len, 2071 u8 bands_used, u32 *rate_masks, 2072 struct cfg80211_chan_def *chandef, 2073 u32 flags) 2074 { 2075 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 2076 int i; 2077 2078 memset(ie_desc, 0, sizeof(*ie_desc)); 2079 2080 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2081 if (bands_used & BIT(i)) { 2082 pos += ieee80211_build_preq_ies_band(sdata, 2083 buffer + pos, 2084 buffer_len - pos, 2085 ie, ie_len, i, 2086 rate_masks[i], 2087 chandef, 2088 &custom_ie_offset, 2089 flags); 2090 ie_desc->ies[i] = buffer + old_pos; 2091 ie_desc->len[i] = pos - old_pos; 2092 old_pos = pos; 2093 } 2094 } 2095 2096 /* add any remaining custom IEs */ 2097 if (ie && ie_len) { 2098 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 2099 "not enough space for preq custom IEs\n")) 2100 return pos; 2101 memcpy(buffer + pos, ie + custom_ie_offset, 2102 ie_len - custom_ie_offset); 2103 ie_desc->common_ies = buffer + pos; 2104 ie_desc->common_ie_len = ie_len - custom_ie_offset; 2105 pos += ie_len - custom_ie_offset; 2106 } 2107 2108 return pos; 2109 }; 2110 2111 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 2112 const u8 *src, const u8 *dst, 2113 u32 ratemask, 2114 struct ieee80211_channel *chan, 2115 const u8 *ssid, size_t ssid_len, 2116 const u8 *ie, size_t ie_len, 2117 u32 flags) 2118 { 2119 struct ieee80211_local *local = sdata->local; 2120 struct cfg80211_chan_def chandef; 2121 struct sk_buff *skb; 2122 struct ieee80211_mgmt *mgmt; 2123 int ies_len; 2124 u32 rate_masks[NUM_NL80211_BANDS] = {}; 2125 struct ieee80211_scan_ies dummy_ie_desc; 2126 2127 /* 2128 * Do not send DS Channel parameter for directed probe requests 2129 * in order to maximize the chance that we get a response. Some 2130 * badly-behaved APs don't respond when this parameter is included. 2131 */ 2132 chandef.width = sdata->vif.bss_conf.chandef.width; 2133 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 2134 chandef.chan = NULL; 2135 else 2136 chandef.chan = chan; 2137 2138 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 2139 local->scan_ies_len + ie_len); 2140 if (!skb) 2141 return NULL; 2142 2143 rate_masks[chan->band] = ratemask; 2144 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb), 2145 skb_tailroom(skb), &dummy_ie_desc, 2146 ie, ie_len, BIT(chan->band), 2147 rate_masks, &chandef, flags); 2148 skb_put(skb, ies_len); 2149 2150 if (dst) { 2151 mgmt = (struct ieee80211_mgmt *) skb->data; 2152 memcpy(mgmt->da, dst, ETH_ALEN); 2153 memcpy(mgmt->bssid, dst, ETH_ALEN); 2154 } 2155 2156 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2157 2158 return skb; 2159 } 2160 2161 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 2162 struct ieee802_11_elems *elems, 2163 enum nl80211_band band, u32 *basic_rates) 2164 { 2165 struct ieee80211_supported_band *sband; 2166 size_t num_rates; 2167 u32 supp_rates, rate_flags; 2168 int i, j, shift; 2169 2170 sband = sdata->local->hw.wiphy->bands[band]; 2171 if (WARN_ON(!sband)) 2172 return 1; 2173 2174 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2175 shift = ieee80211_vif_get_shift(&sdata->vif); 2176 2177 num_rates = sband->n_bitrates; 2178 supp_rates = 0; 2179 for (i = 0; i < elems->supp_rates_len + 2180 elems->ext_supp_rates_len; i++) { 2181 u8 rate = 0; 2182 int own_rate; 2183 bool is_basic; 2184 if (i < elems->supp_rates_len) 2185 rate = elems->supp_rates[i]; 2186 else if (elems->ext_supp_rates) 2187 rate = elems->ext_supp_rates 2188 [i - elems->supp_rates_len]; 2189 own_rate = 5 * (rate & 0x7f); 2190 is_basic = !!(rate & 0x80); 2191 2192 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2193 continue; 2194 2195 for (j = 0; j < num_rates; j++) { 2196 int brate; 2197 if ((rate_flags & sband->bitrates[j].flags) 2198 != rate_flags) 2199 continue; 2200 2201 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 2202 1 << shift); 2203 2204 if (brate == own_rate) { 2205 supp_rates |= BIT(j); 2206 if (basic_rates && is_basic) 2207 *basic_rates |= BIT(j); 2208 } 2209 } 2210 } 2211 return supp_rates; 2212 } 2213 2214 void ieee80211_stop_device(struct ieee80211_local *local) 2215 { 2216 ieee80211_led_radio(local, false); 2217 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2218 2219 cancel_work_sync(&local->reconfig_filter); 2220 2221 flush_workqueue(local->workqueue); 2222 drv_stop(local); 2223 } 2224 2225 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2226 bool aborted) 2227 { 2228 /* It's possible that we don't handle the scan completion in 2229 * time during suspend, so if it's still marked as completed 2230 * here, queue the work and flush it to clean things up. 2231 * Instead of calling the worker function directly here, we 2232 * really queue it to avoid potential races with other flows 2233 * scheduling the same work. 2234 */ 2235 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2236 /* If coming from reconfiguration failure, abort the scan so 2237 * we don't attempt to continue a partial HW scan - which is 2238 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2239 * completed scan, and a 5 GHz portion is still pending. 2240 */ 2241 if (aborted) 2242 set_bit(SCAN_ABORTED, &local->scanning); 2243 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2244 flush_delayed_work(&local->scan_work); 2245 } 2246 } 2247 2248 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2249 { 2250 struct ieee80211_sub_if_data *sdata; 2251 struct ieee80211_chanctx *ctx; 2252 2253 /* 2254 * We get here if during resume the device can't be restarted properly. 2255 * We might also get here if this happens during HW reset, which is a 2256 * slightly different situation and we need to drop all connections in 2257 * the latter case. 2258 * 2259 * Ask cfg80211 to turn off all interfaces, this will result in more 2260 * warnings but at least we'll then get into a clean stopped state. 2261 */ 2262 2263 local->resuming = false; 2264 local->suspended = false; 2265 local->in_reconfig = false; 2266 2267 ieee80211_flush_completed_scan(local, true); 2268 2269 /* scheduled scan clearly can't be running any more, but tell 2270 * cfg80211 and clear local state 2271 */ 2272 ieee80211_sched_scan_end(local); 2273 2274 list_for_each_entry(sdata, &local->interfaces, list) 2275 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2276 2277 /* Mark channel contexts as not being in the driver any more to avoid 2278 * removing them from the driver during the shutdown process... 2279 */ 2280 mutex_lock(&local->chanctx_mtx); 2281 list_for_each_entry(ctx, &local->chanctx_list, list) 2282 ctx->driver_present = false; 2283 mutex_unlock(&local->chanctx_mtx); 2284 } 2285 2286 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2287 struct ieee80211_sub_if_data *sdata, 2288 struct ieee80211_link_data *link) 2289 { 2290 struct ieee80211_chanctx_conf *conf; 2291 struct ieee80211_chanctx *ctx; 2292 2293 if (!local->use_chanctx) 2294 return; 2295 2296 mutex_lock(&local->chanctx_mtx); 2297 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2298 lockdep_is_held(&local->chanctx_mtx)); 2299 if (conf) { 2300 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2301 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 2302 } 2303 mutex_unlock(&local->chanctx_mtx); 2304 } 2305 2306 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2307 { 2308 struct ieee80211_local *local = sdata->local; 2309 struct sta_info *sta; 2310 2311 /* add STAs back */ 2312 mutex_lock(&local->sta_mtx); 2313 list_for_each_entry(sta, &local->sta_list, list) { 2314 enum ieee80211_sta_state state; 2315 2316 if (!sta->uploaded || sta->sdata != sdata) 2317 continue; 2318 2319 for (state = IEEE80211_STA_NOTEXIST; 2320 state < sta->sta_state; state++) 2321 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2322 state + 1)); 2323 } 2324 mutex_unlock(&local->sta_mtx); 2325 } 2326 2327 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2328 { 2329 struct cfg80211_nan_func *func, **funcs; 2330 int res, id, i = 0; 2331 2332 res = drv_start_nan(sdata->local, sdata, 2333 &sdata->u.nan.conf); 2334 if (WARN_ON(res)) 2335 return res; 2336 2337 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2338 sizeof(*funcs), 2339 GFP_KERNEL); 2340 if (!funcs) 2341 return -ENOMEM; 2342 2343 /* Add all the functions: 2344 * This is a little bit ugly. We need to call a potentially sleeping 2345 * callback for each NAN function, so we can't hold the spinlock. 2346 */ 2347 spin_lock_bh(&sdata->u.nan.func_lock); 2348 2349 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2350 funcs[i++] = func; 2351 2352 spin_unlock_bh(&sdata->u.nan.func_lock); 2353 2354 for (i = 0; funcs[i]; i++) { 2355 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2356 if (WARN_ON(res)) 2357 ieee80211_nan_func_terminated(&sdata->vif, 2358 funcs[i]->instance_id, 2359 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2360 GFP_KERNEL); 2361 } 2362 2363 kfree(funcs); 2364 2365 return 0; 2366 } 2367 2368 int ieee80211_reconfig(struct ieee80211_local *local) 2369 { 2370 struct ieee80211_hw *hw = &local->hw; 2371 struct ieee80211_sub_if_data *sdata; 2372 struct ieee80211_chanctx *ctx; 2373 struct sta_info *sta; 2374 int res, i; 2375 bool reconfig_due_to_wowlan = false; 2376 struct ieee80211_sub_if_data *sched_scan_sdata; 2377 struct cfg80211_sched_scan_request *sched_scan_req; 2378 bool sched_scan_stopped = false; 2379 bool suspended = local->suspended; 2380 bool in_reconfig = false; 2381 2382 /* nothing to do if HW shouldn't run */ 2383 if (!local->open_count) 2384 goto wake_up; 2385 2386 #ifdef CONFIG_PM 2387 if (suspended) 2388 local->resuming = true; 2389 2390 if (local->wowlan) { 2391 /* 2392 * In the wowlan case, both mac80211 and the device 2393 * are functional when the resume op is called, so 2394 * clear local->suspended so the device could operate 2395 * normally (e.g. pass rx frames). 2396 */ 2397 local->suspended = false; 2398 res = drv_resume(local); 2399 local->wowlan = false; 2400 if (res < 0) { 2401 local->resuming = false; 2402 return res; 2403 } 2404 if (res == 0) 2405 goto wake_up; 2406 WARN_ON(res > 1); 2407 /* 2408 * res is 1, which means the driver requested 2409 * to go through a regular reset on wakeup. 2410 * restore local->suspended in this case. 2411 */ 2412 reconfig_due_to_wowlan = true; 2413 local->suspended = true; 2414 } 2415 #endif 2416 2417 /* 2418 * In case of hw_restart during suspend (without wowlan), 2419 * cancel restart work, as we are reconfiguring the device 2420 * anyway. 2421 * Note that restart_work is scheduled on a frozen workqueue, 2422 * so we can't deadlock in this case. 2423 */ 2424 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2425 cancel_work_sync(&local->restart_work); 2426 2427 local->started = false; 2428 2429 /* 2430 * Upon resume hardware can sometimes be goofy due to 2431 * various platform / driver / bus issues, so restarting 2432 * the device may at times not work immediately. Propagate 2433 * the error. 2434 */ 2435 res = drv_start(local); 2436 if (res) { 2437 if (suspended) 2438 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2439 else 2440 WARN(1, "Hardware became unavailable during restart.\n"); 2441 ieee80211_handle_reconfig_failure(local); 2442 return res; 2443 } 2444 2445 /* setup fragmentation threshold */ 2446 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2447 2448 /* setup RTS threshold */ 2449 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2450 2451 /* reset coverage class */ 2452 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2453 2454 ieee80211_led_radio(local, true); 2455 ieee80211_mod_tpt_led_trig(local, 2456 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2457 2458 /* add interfaces */ 2459 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2460 if (sdata) { 2461 /* in HW restart it exists already */ 2462 WARN_ON(local->resuming); 2463 res = drv_add_interface(local, sdata); 2464 if (WARN_ON(res)) { 2465 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2466 synchronize_net(); 2467 kfree(sdata); 2468 } 2469 } 2470 2471 list_for_each_entry(sdata, &local->interfaces, list) { 2472 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2473 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2474 ieee80211_sdata_running(sdata)) { 2475 res = drv_add_interface(local, sdata); 2476 if (WARN_ON(res)) 2477 break; 2478 } 2479 } 2480 2481 /* If adding any of the interfaces failed above, roll back and 2482 * report failure. 2483 */ 2484 if (res) { 2485 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2486 list) 2487 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2488 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2489 ieee80211_sdata_running(sdata)) 2490 drv_remove_interface(local, sdata); 2491 ieee80211_handle_reconfig_failure(local); 2492 return res; 2493 } 2494 2495 /* add channel contexts */ 2496 if (local->use_chanctx) { 2497 mutex_lock(&local->chanctx_mtx); 2498 list_for_each_entry(ctx, &local->chanctx_list, list) 2499 if (ctx->replace_state != 2500 IEEE80211_CHANCTX_REPLACES_OTHER) 2501 WARN_ON(drv_add_chanctx(local, ctx)); 2502 mutex_unlock(&local->chanctx_mtx); 2503 2504 sdata = wiphy_dereference(local->hw.wiphy, 2505 local->monitor_sdata); 2506 if (sdata && ieee80211_sdata_running(sdata)) 2507 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2508 } 2509 2510 /* reconfigure hardware */ 2511 ieee80211_hw_config(local, ~0); 2512 2513 ieee80211_configure_filter(local); 2514 2515 /* Finally also reconfigure all the BSS information */ 2516 list_for_each_entry(sdata, &local->interfaces, list) { 2517 unsigned int link_id; 2518 u32 changed; 2519 2520 if (!ieee80211_sdata_running(sdata)) 2521 continue; 2522 2523 sdata_lock(sdata); 2524 for (link_id = 0; 2525 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2526 link_id++) { 2527 struct ieee80211_link_data *link; 2528 2529 link = sdata_dereference(sdata->link[link_id], sdata); 2530 if (link) 2531 ieee80211_assign_chanctx(local, sdata, link); 2532 } 2533 2534 switch (sdata->vif.type) { 2535 case NL80211_IFTYPE_AP_VLAN: 2536 case NL80211_IFTYPE_MONITOR: 2537 break; 2538 case NL80211_IFTYPE_ADHOC: 2539 if (sdata->vif.cfg.ibss_joined) 2540 WARN_ON(drv_join_ibss(local, sdata)); 2541 fallthrough; 2542 default: 2543 ieee80211_reconfig_stations(sdata); 2544 fallthrough; 2545 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2546 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2547 drv_conf_tx(local, &sdata->deflink, i, 2548 &sdata->deflink.tx_conf[i]); 2549 break; 2550 } 2551 sdata_unlock(sdata); 2552 2553 /* common change flags for all interface types */ 2554 changed = BSS_CHANGED_ERP_CTS_PROT | 2555 BSS_CHANGED_ERP_PREAMBLE | 2556 BSS_CHANGED_ERP_SLOT | 2557 BSS_CHANGED_HT | 2558 BSS_CHANGED_BASIC_RATES | 2559 BSS_CHANGED_BEACON_INT | 2560 BSS_CHANGED_BSSID | 2561 BSS_CHANGED_CQM | 2562 BSS_CHANGED_QOS | 2563 BSS_CHANGED_IDLE | 2564 BSS_CHANGED_TXPOWER | 2565 BSS_CHANGED_MCAST_RATE; 2566 2567 if (sdata->vif.bss_conf.mu_mimo_owner) 2568 changed |= BSS_CHANGED_MU_GROUPS; 2569 2570 switch (sdata->vif.type) { 2571 case NL80211_IFTYPE_STATION: 2572 changed |= BSS_CHANGED_ASSOC | 2573 BSS_CHANGED_ARP_FILTER | 2574 BSS_CHANGED_PS; 2575 2576 /* Re-send beacon info report to the driver */ 2577 if (sdata->deflink.u.mgd.have_beacon) 2578 changed |= BSS_CHANGED_BEACON_INFO; 2579 2580 if (sdata->vif.bss_conf.max_idle_period || 2581 sdata->vif.bss_conf.protected_keep_alive) 2582 changed |= BSS_CHANGED_KEEP_ALIVE; 2583 2584 sdata_lock(sdata); 2585 ieee80211_bss_info_change_notify(sdata, changed); 2586 sdata_unlock(sdata); 2587 break; 2588 case NL80211_IFTYPE_OCB: 2589 changed |= BSS_CHANGED_OCB; 2590 ieee80211_bss_info_change_notify(sdata, changed); 2591 break; 2592 case NL80211_IFTYPE_ADHOC: 2593 changed |= BSS_CHANGED_IBSS; 2594 fallthrough; 2595 case NL80211_IFTYPE_AP: 2596 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2597 2598 if (sdata->vif.bss_conf.ftm_responder == 1 && 2599 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2600 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2601 changed |= BSS_CHANGED_FTM_RESPONDER; 2602 2603 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2604 changed |= BSS_CHANGED_AP_PROBE_RESP; 2605 2606 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2607 drv_start_ap(local, sdata, 2608 sdata->deflink.conf); 2609 } 2610 fallthrough; 2611 case NL80211_IFTYPE_MESH_POINT: 2612 if (sdata->vif.bss_conf.enable_beacon) { 2613 changed |= BSS_CHANGED_BEACON | 2614 BSS_CHANGED_BEACON_ENABLED; 2615 ieee80211_bss_info_change_notify(sdata, changed); 2616 } 2617 break; 2618 case NL80211_IFTYPE_NAN: 2619 res = ieee80211_reconfig_nan(sdata); 2620 if (res < 0) { 2621 ieee80211_handle_reconfig_failure(local); 2622 return res; 2623 } 2624 break; 2625 case NL80211_IFTYPE_AP_VLAN: 2626 case NL80211_IFTYPE_MONITOR: 2627 case NL80211_IFTYPE_P2P_DEVICE: 2628 /* nothing to do */ 2629 break; 2630 case NL80211_IFTYPE_UNSPECIFIED: 2631 case NUM_NL80211_IFTYPES: 2632 case NL80211_IFTYPE_P2P_CLIENT: 2633 case NL80211_IFTYPE_P2P_GO: 2634 case NL80211_IFTYPE_WDS: 2635 WARN_ON(1); 2636 break; 2637 } 2638 } 2639 2640 ieee80211_recalc_ps(local); 2641 2642 /* 2643 * The sta might be in psm against the ap (e.g. because 2644 * this was the state before a hw restart), so we 2645 * explicitly send a null packet in order to make sure 2646 * it'll sync against the ap (and get out of psm). 2647 */ 2648 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2649 list_for_each_entry(sdata, &local->interfaces, list) { 2650 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2651 continue; 2652 if (!sdata->u.mgd.associated) 2653 continue; 2654 2655 ieee80211_send_nullfunc(local, sdata, false); 2656 } 2657 } 2658 2659 /* APs are now beaconing, add back stations */ 2660 list_for_each_entry(sdata, &local->interfaces, list) { 2661 if (!ieee80211_sdata_running(sdata)) 2662 continue; 2663 2664 sdata_lock(sdata); 2665 switch (sdata->vif.type) { 2666 case NL80211_IFTYPE_AP_VLAN: 2667 case NL80211_IFTYPE_AP: 2668 ieee80211_reconfig_stations(sdata); 2669 break; 2670 default: 2671 break; 2672 } 2673 sdata_unlock(sdata); 2674 } 2675 2676 /* add back keys */ 2677 list_for_each_entry(sdata, &local->interfaces, list) 2678 ieee80211_reenable_keys(sdata); 2679 2680 /* Reconfigure sched scan if it was interrupted by FW restart */ 2681 mutex_lock(&local->mtx); 2682 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2683 lockdep_is_held(&local->mtx)); 2684 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2685 lockdep_is_held(&local->mtx)); 2686 if (sched_scan_sdata && sched_scan_req) 2687 /* 2688 * Sched scan stopped, but we don't want to report it. Instead, 2689 * we're trying to reschedule. However, if more than one scan 2690 * plan was set, we cannot reschedule since we don't know which 2691 * scan plan was currently running (and some scan plans may have 2692 * already finished). 2693 */ 2694 if (sched_scan_req->n_scan_plans > 1 || 2695 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2696 sched_scan_req)) { 2697 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2698 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2699 sched_scan_stopped = true; 2700 } 2701 mutex_unlock(&local->mtx); 2702 2703 if (sched_scan_stopped) 2704 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2705 2706 wake_up: 2707 2708 if (local->monitors == local->open_count && local->monitors > 0) 2709 ieee80211_add_virtual_monitor(local); 2710 2711 /* 2712 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2713 * sessions can be established after a resume. 2714 * 2715 * Also tear down aggregation sessions since reconfiguring 2716 * them in a hardware restart scenario is not easily done 2717 * right now, and the hardware will have lost information 2718 * about the sessions, but we and the AP still think they 2719 * are active. This is really a workaround though. 2720 */ 2721 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2722 mutex_lock(&local->sta_mtx); 2723 2724 list_for_each_entry(sta, &local->sta_list, list) { 2725 if (!local->resuming) 2726 ieee80211_sta_tear_down_BA_sessions( 2727 sta, AGG_STOP_LOCAL_REQUEST); 2728 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2729 } 2730 2731 mutex_unlock(&local->sta_mtx); 2732 } 2733 2734 /* 2735 * If this is for hw restart things are still running. 2736 * We may want to change that later, however. 2737 */ 2738 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2739 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2740 2741 if (local->in_reconfig) { 2742 in_reconfig = local->in_reconfig; 2743 local->in_reconfig = false; 2744 barrier(); 2745 2746 /* Restart deferred ROCs */ 2747 mutex_lock(&local->mtx); 2748 ieee80211_start_next_roc(local); 2749 mutex_unlock(&local->mtx); 2750 2751 /* Requeue all works */ 2752 list_for_each_entry(sdata, &local->interfaces, list) 2753 ieee80211_queue_work(&local->hw, &sdata->work); 2754 } 2755 2756 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2757 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2758 false); 2759 2760 if (in_reconfig) { 2761 list_for_each_entry(sdata, &local->interfaces, list) { 2762 if (!ieee80211_sdata_running(sdata)) 2763 continue; 2764 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2765 ieee80211_sta_restart(sdata); 2766 } 2767 } 2768 2769 if (!suspended) 2770 return 0; 2771 2772 #ifdef CONFIG_PM 2773 /* first set suspended false, then resuming */ 2774 local->suspended = false; 2775 mb(); 2776 local->resuming = false; 2777 2778 ieee80211_flush_completed_scan(local, false); 2779 2780 if (local->open_count && !reconfig_due_to_wowlan) 2781 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2782 2783 list_for_each_entry(sdata, &local->interfaces, list) { 2784 if (!ieee80211_sdata_running(sdata)) 2785 continue; 2786 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2787 ieee80211_sta_restart(sdata); 2788 } 2789 2790 mod_timer(&local->sta_cleanup, jiffies + 1); 2791 #else 2792 WARN_ON(1); 2793 #endif 2794 2795 return 0; 2796 } 2797 2798 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2799 { 2800 struct ieee80211_sub_if_data *sdata; 2801 struct ieee80211_local *local; 2802 struct ieee80211_key *key; 2803 2804 if (WARN_ON(!vif)) 2805 return; 2806 2807 sdata = vif_to_sdata(vif); 2808 local = sdata->local; 2809 2810 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2811 !local->resuming)) 2812 return; 2813 2814 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2815 !local->in_reconfig)) 2816 return; 2817 2818 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2819 return; 2820 2821 sdata->flags |= flag; 2822 2823 mutex_lock(&local->key_mtx); 2824 list_for_each_entry(key, &sdata->key_list, list) 2825 key->flags |= KEY_FLAG_TAINTED; 2826 mutex_unlock(&local->key_mtx); 2827 } 2828 2829 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2830 { 2831 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2832 } 2833 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2834 2835 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2836 { 2837 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2838 } 2839 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2840 2841 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2842 struct ieee80211_link_data *link) 2843 { 2844 struct ieee80211_local *local = sdata->local; 2845 struct ieee80211_chanctx_conf *chanctx_conf; 2846 struct ieee80211_chanctx *chanctx; 2847 2848 mutex_lock(&local->chanctx_mtx); 2849 2850 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2851 lockdep_is_held(&local->chanctx_mtx)); 2852 2853 /* 2854 * This function can be called from a work, thus it may be possible 2855 * that the chanctx_conf is removed (due to a disconnection, for 2856 * example). 2857 * So nothing should be done in such case. 2858 */ 2859 if (!chanctx_conf) 2860 goto unlock; 2861 2862 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2863 ieee80211_recalc_smps_chanctx(local, chanctx); 2864 unlock: 2865 mutex_unlock(&local->chanctx_mtx); 2866 } 2867 2868 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2869 int link_id) 2870 { 2871 struct ieee80211_local *local = sdata->local; 2872 struct ieee80211_chanctx_conf *chanctx_conf; 2873 struct ieee80211_chanctx *chanctx; 2874 int i; 2875 2876 mutex_lock(&local->chanctx_mtx); 2877 2878 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2879 struct ieee80211_bss_conf *bss_conf; 2880 2881 if (link_id >= 0 && link_id != i) 2882 continue; 2883 2884 rcu_read_lock(); 2885 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2886 if (!bss_conf) { 2887 rcu_read_unlock(); 2888 continue; 2889 } 2890 2891 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2892 lockdep_is_held(&local->chanctx_mtx)); 2893 /* 2894 * Since we hold the chanctx_mtx (checked above) 2895 * we can take the chanctx_conf pointer out of the 2896 * RCU critical section, it cannot go away without 2897 * the mutex. Just the way we reached it could - in 2898 * theory - go away, but we don't really care and 2899 * it really shouldn't happen anyway. 2900 */ 2901 rcu_read_unlock(); 2902 2903 if (WARN_ON_ONCE(!chanctx_conf)) 2904 goto unlock; 2905 2906 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2907 conf); 2908 ieee80211_recalc_chanctx_min_def(local, chanctx); 2909 } 2910 unlock: 2911 mutex_unlock(&local->chanctx_mtx); 2912 } 2913 2914 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2915 { 2916 size_t pos = offset; 2917 2918 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2919 pos += 2 + ies[pos + 1]; 2920 2921 return pos; 2922 } 2923 2924 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2925 u16 cap) 2926 { 2927 __le16 tmp; 2928 2929 *pos++ = WLAN_EID_HT_CAPABILITY; 2930 *pos++ = sizeof(struct ieee80211_ht_cap); 2931 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2932 2933 /* capability flags */ 2934 tmp = cpu_to_le16(cap); 2935 memcpy(pos, &tmp, sizeof(u16)); 2936 pos += sizeof(u16); 2937 2938 /* AMPDU parameters */ 2939 *pos++ = ht_cap->ampdu_factor | 2940 (ht_cap->ampdu_density << 2941 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2942 2943 /* MCS set */ 2944 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2945 pos += sizeof(ht_cap->mcs); 2946 2947 /* extended capabilities */ 2948 pos += sizeof(__le16); 2949 2950 /* BF capabilities */ 2951 pos += sizeof(__le32); 2952 2953 /* antenna selection */ 2954 pos += sizeof(u8); 2955 2956 return pos; 2957 } 2958 2959 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2960 u32 cap) 2961 { 2962 __le32 tmp; 2963 2964 *pos++ = WLAN_EID_VHT_CAPABILITY; 2965 *pos++ = sizeof(struct ieee80211_vht_cap); 2966 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2967 2968 /* capability flags */ 2969 tmp = cpu_to_le32(cap); 2970 memcpy(pos, &tmp, sizeof(u32)); 2971 pos += sizeof(u32); 2972 2973 /* VHT MCS set */ 2974 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2975 pos += sizeof(vht_cap->vht_mcs); 2976 2977 return pos; 2978 } 2979 2980 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2981 { 2982 const struct ieee80211_sta_he_cap *he_cap; 2983 struct ieee80211_supported_band *sband; 2984 u8 n; 2985 2986 sband = ieee80211_get_sband(sdata); 2987 if (!sband) 2988 return 0; 2989 2990 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2991 if (!he_cap) 2992 return 0; 2993 2994 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2995 return 2 + 1 + 2996 sizeof(he_cap->he_cap_elem) + n + 2997 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2998 he_cap->he_cap_elem.phy_cap_info); 2999 } 3000 3001 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos, 3002 const struct ieee80211_sta_he_cap *he_cap, 3003 u8 *end) 3004 { 3005 struct ieee80211_he_cap_elem elem; 3006 u8 n; 3007 u8 ie_len; 3008 u8 *orig_pos = pos; 3009 3010 /* Make sure we have place for the IE */ 3011 /* 3012 * TODO: the 1 added is because this temporarily is under the EXTENSION 3013 * IE. Get rid of it when it moves. 3014 */ 3015 if (!he_cap) 3016 return orig_pos; 3017 3018 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 3019 elem = he_cap->he_cap_elem; 3020 3021 if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ) 3022 elem.phy_cap_info[0] &= 3023 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 3024 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 3025 3026 if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ) 3027 elem.phy_cap_info[0] &= 3028 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3029 3030 if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ) 3031 elem.phy_cap_info[0] &= 3032 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3033 3034 n = ieee80211_he_mcs_nss_size(&elem); 3035 ie_len = 2 + 1 + 3036 sizeof(he_cap->he_cap_elem) + n + 3037 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3038 he_cap->he_cap_elem.phy_cap_info); 3039 3040 if ((end - pos) < ie_len) 3041 return orig_pos; 3042 3043 *pos++ = WLAN_EID_EXTENSION; 3044 pos++; /* We'll set the size later below */ 3045 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 3046 3047 /* Fixed data */ 3048 memcpy(pos, &elem, sizeof(elem)); 3049 pos += sizeof(elem); 3050 3051 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 3052 pos += n; 3053 3054 /* Check if PPE Threshold should be present */ 3055 if ((he_cap->he_cap_elem.phy_cap_info[6] & 3056 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 3057 goto end; 3058 3059 /* 3060 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 3061 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 3062 */ 3063 n = hweight8(he_cap->ppe_thres[0] & 3064 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 3065 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 3066 IEEE80211_PPE_THRES_NSS_POS)); 3067 3068 /* 3069 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 3070 * total size. 3071 */ 3072 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 3073 n = DIV_ROUND_UP(n, 8); 3074 3075 /* Copy PPE Thresholds */ 3076 memcpy(pos, &he_cap->ppe_thres, n); 3077 pos += n; 3078 3079 end: 3080 orig_pos[1] = (pos - orig_pos) - 2; 3081 return pos; 3082 } 3083 3084 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata, 3085 enum ieee80211_smps_mode smps_mode, 3086 struct sk_buff *skb) 3087 { 3088 struct ieee80211_supported_band *sband; 3089 const struct ieee80211_sband_iftype_data *iftd; 3090 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3091 u8 *pos; 3092 u16 cap; 3093 3094 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 3095 BIT(NL80211_BAND_6GHZ), 3096 IEEE80211_CHAN_NO_HE)) 3097 return; 3098 3099 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3100 3101 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 3102 if (!iftd) 3103 return; 3104 3105 /* Check for device HE 6 GHz capability before adding element */ 3106 if (!iftd->he_6ghz_capa.capa) 3107 return; 3108 3109 cap = le16_to_cpu(iftd->he_6ghz_capa.capa); 3110 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS; 3111 3112 switch (smps_mode) { 3113 case IEEE80211_SMPS_AUTOMATIC: 3114 case IEEE80211_SMPS_NUM_MODES: 3115 WARN_ON(1); 3116 fallthrough; 3117 case IEEE80211_SMPS_OFF: 3118 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 3119 IEEE80211_HE_6GHZ_CAP_SM_PS); 3120 break; 3121 case IEEE80211_SMPS_STATIC: 3122 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 3123 IEEE80211_HE_6GHZ_CAP_SM_PS); 3124 break; 3125 case IEEE80211_SMPS_DYNAMIC: 3126 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 3127 IEEE80211_HE_6GHZ_CAP_SM_PS); 3128 break; 3129 } 3130 3131 pos = skb_put(skb, 2 + 1 + sizeof(cap)); 3132 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap), 3133 pos + 2 + 1 + sizeof(cap)); 3134 } 3135 3136 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3137 const struct cfg80211_chan_def *chandef, 3138 u16 prot_mode, bool rifs_mode) 3139 { 3140 struct ieee80211_ht_operation *ht_oper; 3141 /* Build HT Information */ 3142 *pos++ = WLAN_EID_HT_OPERATION; 3143 *pos++ = sizeof(struct ieee80211_ht_operation); 3144 ht_oper = (struct ieee80211_ht_operation *)pos; 3145 ht_oper->primary_chan = ieee80211_frequency_to_channel( 3146 chandef->chan->center_freq); 3147 switch (chandef->width) { 3148 case NL80211_CHAN_WIDTH_160: 3149 case NL80211_CHAN_WIDTH_80P80: 3150 case NL80211_CHAN_WIDTH_80: 3151 case NL80211_CHAN_WIDTH_40: 3152 if (chandef->center_freq1 > chandef->chan->center_freq) 3153 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3154 else 3155 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3156 break; 3157 case NL80211_CHAN_WIDTH_320: 3158 /* HT information element should not be included on 6GHz */ 3159 WARN_ON(1); 3160 return pos; 3161 default: 3162 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 3163 break; 3164 } 3165 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 3166 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 3167 chandef->width != NL80211_CHAN_WIDTH_20) 3168 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 3169 3170 if (rifs_mode) 3171 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 3172 3173 ht_oper->operation_mode = cpu_to_le16(prot_mode); 3174 ht_oper->stbc_param = 0x0000; 3175 3176 /* It seems that Basic MCS set and Supported MCS set 3177 are identical for the first 10 bytes */ 3178 memset(&ht_oper->basic_set, 0, 16); 3179 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 3180 3181 return pos + sizeof(struct ieee80211_ht_operation); 3182 } 3183 3184 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 3185 const struct cfg80211_chan_def *chandef) 3186 { 3187 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 3188 *pos++ = 3; /* IE length */ 3189 /* New channel width */ 3190 switch (chandef->width) { 3191 case NL80211_CHAN_WIDTH_80: 3192 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 3193 break; 3194 case NL80211_CHAN_WIDTH_160: 3195 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 3196 break; 3197 case NL80211_CHAN_WIDTH_80P80: 3198 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 3199 break; 3200 case NL80211_CHAN_WIDTH_320: 3201 /* The behavior is not defined for 320 MHz channels */ 3202 WARN_ON(1); 3203 fallthrough; 3204 default: 3205 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 3206 } 3207 3208 /* new center frequency segment 0 */ 3209 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 3210 /* new center frequency segment 1 */ 3211 if (chandef->center_freq2) 3212 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 3213 else 3214 *pos++ = 0; 3215 } 3216 3217 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3218 const struct cfg80211_chan_def *chandef) 3219 { 3220 struct ieee80211_vht_operation *vht_oper; 3221 3222 *pos++ = WLAN_EID_VHT_OPERATION; 3223 *pos++ = sizeof(struct ieee80211_vht_operation); 3224 vht_oper = (struct ieee80211_vht_operation *)pos; 3225 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 3226 chandef->center_freq1); 3227 if (chandef->center_freq2) 3228 vht_oper->center_freq_seg1_idx = 3229 ieee80211_frequency_to_channel(chandef->center_freq2); 3230 else 3231 vht_oper->center_freq_seg1_idx = 0x00; 3232 3233 switch (chandef->width) { 3234 case NL80211_CHAN_WIDTH_160: 3235 /* 3236 * Convert 160 MHz channel width to new style as interop 3237 * workaround. 3238 */ 3239 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3240 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 3241 if (chandef->chan->center_freq < chandef->center_freq1) 3242 vht_oper->center_freq_seg0_idx -= 8; 3243 else 3244 vht_oper->center_freq_seg0_idx += 8; 3245 break; 3246 case NL80211_CHAN_WIDTH_80P80: 3247 /* 3248 * Convert 80+80 MHz channel width to new style as interop 3249 * workaround. 3250 */ 3251 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3252 break; 3253 case NL80211_CHAN_WIDTH_80: 3254 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3255 break; 3256 case NL80211_CHAN_WIDTH_320: 3257 /* VHT information element should not be included on 6GHz */ 3258 WARN_ON(1); 3259 return pos; 3260 default: 3261 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 3262 break; 3263 } 3264 3265 /* don't require special VHT peer rates */ 3266 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 3267 3268 return pos + sizeof(struct ieee80211_vht_operation); 3269 } 3270 3271 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef) 3272 { 3273 struct ieee80211_he_operation *he_oper; 3274 struct ieee80211_he_6ghz_oper *he_6ghz_op; 3275 u32 he_oper_params; 3276 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 3277 3278 if (chandef->chan->band == NL80211_BAND_6GHZ) 3279 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 3280 3281 *pos++ = WLAN_EID_EXTENSION; 3282 *pos++ = ie_len; 3283 *pos++ = WLAN_EID_EXT_HE_OPERATION; 3284 3285 he_oper_params = 0; 3286 he_oper_params |= u32_encode_bits(1023, /* disabled */ 3287 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3288 he_oper_params |= u32_encode_bits(1, 3289 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 3290 he_oper_params |= u32_encode_bits(1, 3291 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3292 if (chandef->chan->band == NL80211_BAND_6GHZ) 3293 he_oper_params |= u32_encode_bits(1, 3294 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 3295 3296 he_oper = (struct ieee80211_he_operation *)pos; 3297 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 3298 3299 /* don't require special HE peer rates */ 3300 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 3301 pos += sizeof(struct ieee80211_he_operation); 3302 3303 if (chandef->chan->band != NL80211_BAND_6GHZ) 3304 goto out; 3305 3306 /* TODO add VHT operational */ 3307 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3308 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3309 he_6ghz_op->primary = 3310 ieee80211_frequency_to_channel(chandef->chan->center_freq); 3311 he_6ghz_op->ccfs0 = 3312 ieee80211_frequency_to_channel(chandef->center_freq1); 3313 if (chandef->center_freq2) 3314 he_6ghz_op->ccfs1 = 3315 ieee80211_frequency_to_channel(chandef->center_freq2); 3316 else 3317 he_6ghz_op->ccfs1 = 0; 3318 3319 switch (chandef->width) { 3320 case NL80211_CHAN_WIDTH_320: 3321 /* 3322 * TODO: mesh operation is not defined over 6GHz 320 MHz 3323 * channels. 3324 */ 3325 WARN_ON(1); 3326 break; 3327 case NL80211_CHAN_WIDTH_160: 3328 /* Convert 160 MHz channel width to new style as interop 3329 * workaround. 3330 */ 3331 he_6ghz_op->control = 3332 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3333 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3334 if (chandef->chan->center_freq < chandef->center_freq1) 3335 he_6ghz_op->ccfs0 -= 8; 3336 else 3337 he_6ghz_op->ccfs0 += 8; 3338 fallthrough; 3339 case NL80211_CHAN_WIDTH_80P80: 3340 he_6ghz_op->control = 3341 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3342 break; 3343 case NL80211_CHAN_WIDTH_80: 3344 he_6ghz_op->control = 3345 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3346 break; 3347 case NL80211_CHAN_WIDTH_40: 3348 he_6ghz_op->control = 3349 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3350 break; 3351 default: 3352 he_6ghz_op->control = 3353 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3354 break; 3355 } 3356 3357 pos += sizeof(struct ieee80211_he_6ghz_oper); 3358 3359 out: 3360 return pos; 3361 } 3362 3363 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3364 struct cfg80211_chan_def *chandef) 3365 { 3366 enum nl80211_channel_type channel_type; 3367 3368 if (!ht_oper) 3369 return false; 3370 3371 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3372 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3373 channel_type = NL80211_CHAN_HT20; 3374 break; 3375 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3376 channel_type = NL80211_CHAN_HT40PLUS; 3377 break; 3378 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3379 channel_type = NL80211_CHAN_HT40MINUS; 3380 break; 3381 default: 3382 return false; 3383 } 3384 3385 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3386 return true; 3387 } 3388 3389 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3390 const struct ieee80211_vht_operation *oper, 3391 const struct ieee80211_ht_operation *htop, 3392 struct cfg80211_chan_def *chandef) 3393 { 3394 struct cfg80211_chan_def new = *chandef; 3395 int cf0, cf1; 3396 int ccfs0, ccfs1, ccfs2; 3397 int ccf0, ccf1; 3398 u32 vht_cap; 3399 bool support_80_80 = false; 3400 bool support_160 = false; 3401 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3402 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3403 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3404 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3405 3406 if (!oper || !htop) 3407 return false; 3408 3409 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3410 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3411 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3412 support_80_80 = ((vht_cap & 3413 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3414 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3415 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3416 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3417 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3418 ccfs0 = oper->center_freq_seg0_idx; 3419 ccfs1 = oper->center_freq_seg1_idx; 3420 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3421 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3422 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3423 3424 ccf0 = ccfs0; 3425 3426 /* if not supported, parse as though we didn't understand it */ 3427 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3428 ext_nss_bw_supp = 0; 3429 3430 /* 3431 * Cf. IEEE 802.11 Table 9-250 3432 * 3433 * We really just consider that because it's inefficient to connect 3434 * at a higher bandwidth than we'll actually be able to use. 3435 */ 3436 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3437 default: 3438 case 0x00: 3439 ccf1 = 0; 3440 support_160 = false; 3441 support_80_80 = false; 3442 break; 3443 case 0x01: 3444 support_80_80 = false; 3445 fallthrough; 3446 case 0x02: 3447 case 0x03: 3448 ccf1 = ccfs2; 3449 break; 3450 case 0x10: 3451 ccf1 = ccfs1; 3452 break; 3453 case 0x11: 3454 case 0x12: 3455 if (!ccfs1) 3456 ccf1 = ccfs2; 3457 else 3458 ccf1 = ccfs1; 3459 break; 3460 case 0x13: 3461 case 0x20: 3462 case 0x23: 3463 ccf1 = ccfs1; 3464 break; 3465 } 3466 3467 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3468 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3469 3470 switch (oper->chan_width) { 3471 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3472 /* just use HT information directly */ 3473 break; 3474 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3475 new.width = NL80211_CHAN_WIDTH_80; 3476 new.center_freq1 = cf0; 3477 /* If needed, adjust based on the newer interop workaround. */ 3478 if (ccf1) { 3479 unsigned int diff; 3480 3481 diff = abs(ccf1 - ccf0); 3482 if ((diff == 8) && support_160) { 3483 new.width = NL80211_CHAN_WIDTH_160; 3484 new.center_freq1 = cf1; 3485 } else if ((diff > 8) && support_80_80) { 3486 new.width = NL80211_CHAN_WIDTH_80P80; 3487 new.center_freq2 = cf1; 3488 } 3489 } 3490 break; 3491 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3492 /* deprecated encoding */ 3493 new.width = NL80211_CHAN_WIDTH_160; 3494 new.center_freq1 = cf0; 3495 break; 3496 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3497 /* deprecated encoding */ 3498 new.width = NL80211_CHAN_WIDTH_80P80; 3499 new.center_freq1 = cf0; 3500 new.center_freq2 = cf1; 3501 break; 3502 default: 3503 return false; 3504 } 3505 3506 if (!cfg80211_chandef_valid(&new)) 3507 return false; 3508 3509 *chandef = new; 3510 return true; 3511 } 3512 3513 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper, 3514 bool support_160, bool support_320, 3515 struct cfg80211_chan_def *chandef) 3516 { 3517 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 3518 3519 chandef->center_freq1 = 3520 ieee80211_channel_to_frequency(info->ccfs0, 3521 chandef->chan->band); 3522 3523 switch (u8_get_bits(info->control, 3524 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3525 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3526 chandef->width = NL80211_CHAN_WIDTH_20; 3527 break; 3528 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3529 chandef->width = NL80211_CHAN_WIDTH_40; 3530 break; 3531 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3532 chandef->width = NL80211_CHAN_WIDTH_80; 3533 break; 3534 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3535 if (support_160) { 3536 chandef->width = NL80211_CHAN_WIDTH_160; 3537 chandef->center_freq1 = 3538 ieee80211_channel_to_frequency(info->ccfs1, 3539 chandef->chan->band); 3540 } else { 3541 chandef->width = NL80211_CHAN_WIDTH_80; 3542 } 3543 break; 3544 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3545 if (support_320) { 3546 chandef->width = NL80211_CHAN_WIDTH_320; 3547 chandef->center_freq1 = 3548 ieee80211_channel_to_frequency(info->ccfs1, 3549 chandef->chan->band); 3550 } else if (support_160) { 3551 chandef->width = NL80211_CHAN_WIDTH_160; 3552 } else { 3553 chandef->width = NL80211_CHAN_WIDTH_80; 3554 3555 if (chandef->center_freq1 > chandef->chan->center_freq) 3556 chandef->center_freq1 -= 40; 3557 else 3558 chandef->center_freq1 += 40; 3559 } 3560 break; 3561 } 3562 } 3563 3564 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata, 3565 const struct ieee80211_he_operation *he_oper, 3566 const struct ieee80211_eht_operation *eht_oper, 3567 struct cfg80211_chan_def *chandef) 3568 { 3569 struct ieee80211_local *local = sdata->local; 3570 struct ieee80211_supported_band *sband; 3571 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3572 const struct ieee80211_sta_he_cap *he_cap; 3573 const struct ieee80211_sta_eht_cap *eht_cap; 3574 struct cfg80211_chan_def he_chandef = *chandef; 3575 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3576 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3577 bool support_80_80, support_160, support_320; 3578 u8 he_phy_cap, eht_phy_cap; 3579 u32 freq; 3580 3581 if (chandef->chan->band != NL80211_BAND_6GHZ) 3582 return true; 3583 3584 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3585 3586 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3587 if (!he_cap) { 3588 sdata_info(sdata, "Missing iftype sband data/HE cap"); 3589 return false; 3590 } 3591 3592 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0]; 3593 support_160 = 3594 he_phy_cap & 3595 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3596 support_80_80 = 3597 he_phy_cap & 3598 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3599 3600 if (!he_oper) { 3601 sdata_info(sdata, 3602 "HE is not advertised on (on %d MHz), expect issues\n", 3603 chandef->chan->center_freq); 3604 return false; 3605 } 3606 3607 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 3608 if (!eht_cap) { 3609 sdata_info(sdata, "Missing iftype sband data/EHT cap"); 3610 eht_oper = NULL; 3611 } 3612 3613 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3614 3615 if (!he_6ghz_oper) { 3616 sdata_info(sdata, 3617 "HE 6GHz operation missing (on %d MHz), expect issues\n", 3618 chandef->chan->center_freq); 3619 return false; 3620 } 3621 3622 /* 3623 * The EHT operation IE does not contain the primary channel so the 3624 * primary channel frequency should be taken from the 6 GHz operation 3625 * information. 3626 */ 3627 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3628 NL80211_BAND_6GHZ); 3629 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 3630 3631 switch (u8_get_bits(he_6ghz_oper->control, 3632 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 3633 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 3634 bss_conf->power_type = IEEE80211_REG_LPI_AP; 3635 break; 3636 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 3637 bss_conf->power_type = IEEE80211_REG_SP_AP; 3638 break; 3639 default: 3640 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 3641 break; 3642 } 3643 3644 if (!eht_oper || 3645 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3646 switch (u8_get_bits(he_6ghz_oper->control, 3647 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3648 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3649 he_chandef.width = NL80211_CHAN_WIDTH_20; 3650 break; 3651 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3652 he_chandef.width = NL80211_CHAN_WIDTH_40; 3653 break; 3654 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3655 he_chandef.width = NL80211_CHAN_WIDTH_80; 3656 break; 3657 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3658 he_chandef.width = NL80211_CHAN_WIDTH_80; 3659 if (!he_6ghz_oper->ccfs1) 3660 break; 3661 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) { 3662 if (support_160) 3663 he_chandef.width = NL80211_CHAN_WIDTH_160; 3664 } else { 3665 if (support_80_80) 3666 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3667 } 3668 break; 3669 } 3670 3671 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3672 he_chandef.center_freq1 = 3673 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3674 NL80211_BAND_6GHZ); 3675 } else { 3676 he_chandef.center_freq1 = 3677 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3678 NL80211_BAND_6GHZ); 3679 if (support_80_80 || support_160) 3680 he_chandef.center_freq2 = 3681 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3682 NL80211_BAND_6GHZ); 3683 } 3684 } else { 3685 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0]; 3686 support_320 = 3687 eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 3688 3689 ieee80211_chandef_eht_oper(eht_oper, support_160, 3690 support_320, &he_chandef); 3691 } 3692 3693 if (!cfg80211_chandef_valid(&he_chandef)) { 3694 sdata_info(sdata, 3695 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n", 3696 he_chandef.chan ? he_chandef.chan->center_freq : 0, 3697 he_chandef.width, 3698 he_chandef.center_freq1, 3699 he_chandef.center_freq2); 3700 return false; 3701 } 3702 3703 *chandef = he_chandef; 3704 3705 return true; 3706 } 3707 3708 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper, 3709 struct cfg80211_chan_def *chandef) 3710 { 3711 u32 oper_freq; 3712 3713 if (!oper) 3714 return false; 3715 3716 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3717 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3718 chandef->width = NL80211_CHAN_WIDTH_1; 3719 break; 3720 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3721 chandef->width = NL80211_CHAN_WIDTH_2; 3722 break; 3723 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3724 chandef->width = NL80211_CHAN_WIDTH_4; 3725 break; 3726 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3727 chandef->width = NL80211_CHAN_WIDTH_8; 3728 break; 3729 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3730 chandef->width = NL80211_CHAN_WIDTH_16; 3731 break; 3732 default: 3733 return false; 3734 } 3735 3736 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch, 3737 NL80211_BAND_S1GHZ); 3738 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq); 3739 chandef->freq1_offset = oper_freq % 1000; 3740 3741 return true; 3742 } 3743 3744 int ieee80211_parse_bitrates(enum nl80211_chan_width width, 3745 const struct ieee80211_supported_band *sband, 3746 const u8 *srates, int srates_len, u32 *rates) 3747 { 3748 u32 rate_flags = ieee80211_chanwidth_rate_flags(width); 3749 int shift = ieee80211_chanwidth_get_shift(width); 3750 struct ieee80211_rate *br; 3751 int brate, rate, i, j, count = 0; 3752 3753 *rates = 0; 3754 3755 for (i = 0; i < srates_len; i++) { 3756 rate = srates[i] & 0x7f; 3757 3758 for (j = 0; j < sband->n_bitrates; j++) { 3759 br = &sband->bitrates[j]; 3760 if ((rate_flags & br->flags) != rate_flags) 3761 continue; 3762 3763 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3764 if (brate == rate) { 3765 *rates |= BIT(j); 3766 count++; 3767 break; 3768 } 3769 } 3770 } 3771 return count; 3772 } 3773 3774 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3775 struct sk_buff *skb, bool need_basic, 3776 enum nl80211_band band) 3777 { 3778 struct ieee80211_local *local = sdata->local; 3779 struct ieee80211_supported_band *sband; 3780 int rate, shift; 3781 u8 i, rates, *pos; 3782 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3783 u32 rate_flags; 3784 3785 shift = ieee80211_vif_get_shift(&sdata->vif); 3786 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3787 sband = local->hw.wiphy->bands[band]; 3788 rates = 0; 3789 for (i = 0; i < sband->n_bitrates; i++) { 3790 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3791 continue; 3792 rates++; 3793 } 3794 if (rates > 8) 3795 rates = 8; 3796 3797 if (skb_tailroom(skb) < rates + 2) 3798 return -ENOMEM; 3799 3800 pos = skb_put(skb, rates + 2); 3801 *pos++ = WLAN_EID_SUPP_RATES; 3802 *pos++ = rates; 3803 for (i = 0; i < rates; i++) { 3804 u8 basic = 0; 3805 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3806 continue; 3807 3808 if (need_basic && basic_rates & BIT(i)) 3809 basic = 0x80; 3810 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3811 5 * (1 << shift)); 3812 *pos++ = basic | (u8) rate; 3813 } 3814 3815 return 0; 3816 } 3817 3818 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3819 struct sk_buff *skb, bool need_basic, 3820 enum nl80211_band band) 3821 { 3822 struct ieee80211_local *local = sdata->local; 3823 struct ieee80211_supported_band *sband; 3824 int rate, shift; 3825 u8 i, exrates, *pos; 3826 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3827 u32 rate_flags; 3828 3829 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3830 shift = ieee80211_vif_get_shift(&sdata->vif); 3831 3832 sband = local->hw.wiphy->bands[band]; 3833 exrates = 0; 3834 for (i = 0; i < sband->n_bitrates; i++) { 3835 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3836 continue; 3837 exrates++; 3838 } 3839 3840 if (exrates > 8) 3841 exrates -= 8; 3842 else 3843 exrates = 0; 3844 3845 if (skb_tailroom(skb) < exrates + 2) 3846 return -ENOMEM; 3847 3848 if (exrates) { 3849 pos = skb_put(skb, exrates + 2); 3850 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3851 *pos++ = exrates; 3852 for (i = 8; i < sband->n_bitrates; i++) { 3853 u8 basic = 0; 3854 if ((rate_flags & sband->bitrates[i].flags) 3855 != rate_flags) 3856 continue; 3857 if (need_basic && basic_rates & BIT(i)) 3858 basic = 0x80; 3859 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3860 5 * (1 << shift)); 3861 *pos++ = basic | (u8) rate; 3862 } 3863 } 3864 return 0; 3865 } 3866 3867 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3868 { 3869 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3870 3871 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3872 return 0; 3873 3874 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 3875 } 3876 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3877 3878 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3879 { 3880 if (!mcs) 3881 return 1; 3882 3883 /* TODO: consider rx_highest */ 3884 3885 if (mcs->rx_mask[3]) 3886 return 4; 3887 if (mcs->rx_mask[2]) 3888 return 3; 3889 if (mcs->rx_mask[1]) 3890 return 2; 3891 return 1; 3892 } 3893 3894 /** 3895 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3896 * @local: mac80211 hw info struct 3897 * @status: RX status 3898 * @mpdu_len: total MPDU length (including FCS) 3899 * @mpdu_offset: offset into MPDU to calculate timestamp at 3900 * 3901 * This function calculates the RX timestamp at the given MPDU offset, taking 3902 * into account what the RX timestamp was. An offset of 0 will just normalize 3903 * the timestamp to TSF at beginning of MPDU reception. 3904 */ 3905 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3906 struct ieee80211_rx_status *status, 3907 unsigned int mpdu_len, 3908 unsigned int mpdu_offset) 3909 { 3910 u64 ts = status->mactime; 3911 struct rate_info ri; 3912 u16 rate; 3913 u8 n_ltf; 3914 3915 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3916 return 0; 3917 3918 memset(&ri, 0, sizeof(ri)); 3919 3920 ri.bw = status->bw; 3921 3922 /* Fill cfg80211 rate info */ 3923 switch (status->encoding) { 3924 case RX_ENC_HE: 3925 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3926 ri.mcs = status->rate_idx; 3927 ri.nss = status->nss; 3928 ri.he_ru_alloc = status->he_ru; 3929 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3930 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3931 3932 /* 3933 * See P802.11ax_D6.0, section 27.3.4 for 3934 * VHT PPDU format. 3935 */ 3936 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3937 mpdu_offset += 2; 3938 ts += 36; 3939 3940 /* 3941 * TODO: 3942 * For HE MU PPDU, add the HE-SIG-B. 3943 * For HE ER PPDU, add 8us for the HE-SIG-A. 3944 * For HE TB PPDU, add 4us for the HE-STF. 3945 * Add the HE-LTF durations - variable. 3946 */ 3947 } 3948 3949 break; 3950 case RX_ENC_HT: 3951 ri.mcs = status->rate_idx; 3952 ri.flags |= RATE_INFO_FLAGS_MCS; 3953 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3954 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3955 3956 /* 3957 * See P802.11REVmd_D3.0, section 19.3.2 for 3958 * HT PPDU format. 3959 */ 3960 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3961 mpdu_offset += 2; 3962 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3963 ts += 24; 3964 else 3965 ts += 32; 3966 3967 /* 3968 * Add Data HT-LTFs per streams 3969 * TODO: add Extension HT-LTFs, 4us per LTF 3970 */ 3971 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3972 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3973 ts += n_ltf * 4; 3974 } 3975 3976 break; 3977 case RX_ENC_VHT: 3978 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3979 ri.mcs = status->rate_idx; 3980 ri.nss = status->nss; 3981 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3982 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3983 3984 /* 3985 * See P802.11REVmd_D3.0, section 21.3.2 for 3986 * VHT PPDU format. 3987 */ 3988 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3989 mpdu_offset += 2; 3990 ts += 36; 3991 3992 /* 3993 * Add VHT-LTFs per streams 3994 */ 3995 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3996 ri.nss + 1 : ri.nss; 3997 ts += 4 * n_ltf; 3998 } 3999 4000 break; 4001 default: 4002 WARN_ON(1); 4003 fallthrough; 4004 case RX_ENC_LEGACY: { 4005 struct ieee80211_supported_band *sband; 4006 int shift = 0; 4007 int bitrate; 4008 4009 switch (status->bw) { 4010 case RATE_INFO_BW_10: 4011 shift = 1; 4012 break; 4013 case RATE_INFO_BW_5: 4014 shift = 2; 4015 break; 4016 } 4017 4018 sband = local->hw.wiphy->bands[status->band]; 4019 bitrate = sband->bitrates[status->rate_idx].bitrate; 4020 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 4021 4022 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4023 if (status->band == NL80211_BAND_5GHZ) { 4024 ts += 20 << shift; 4025 mpdu_offset += 2; 4026 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 4027 ts += 96; 4028 } else { 4029 ts += 192; 4030 } 4031 } 4032 break; 4033 } 4034 } 4035 4036 rate = cfg80211_calculate_bitrate(&ri); 4037 if (WARN_ONCE(!rate, 4038 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 4039 (unsigned long long)status->flag, status->rate_idx, 4040 status->nss)) 4041 return 0; 4042 4043 /* rewind from end of MPDU */ 4044 if (status->flag & RX_FLAG_MACTIME_END) 4045 ts -= mpdu_len * 8 * 10 / rate; 4046 4047 ts += mpdu_offset * 8 * 10 / rate; 4048 4049 return ts; 4050 } 4051 4052 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 4053 { 4054 struct ieee80211_sub_if_data *sdata; 4055 struct cfg80211_chan_def chandef; 4056 4057 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 4058 lockdep_assert_wiphy(local->hw.wiphy); 4059 4060 mutex_lock(&local->mtx); 4061 list_for_each_entry(sdata, &local->interfaces, list) { 4062 /* it might be waiting for the local->mtx, but then 4063 * by the time it gets it, sdata->wdev.cac_started 4064 * will no longer be true 4065 */ 4066 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work); 4067 4068 if (sdata->wdev.cac_started) { 4069 chandef = sdata->vif.bss_conf.chandef; 4070 ieee80211_link_release_channel(&sdata->deflink); 4071 cfg80211_cac_event(sdata->dev, 4072 &chandef, 4073 NL80211_RADAR_CAC_ABORTED, 4074 GFP_KERNEL); 4075 } 4076 } 4077 mutex_unlock(&local->mtx); 4078 } 4079 4080 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 4081 { 4082 struct ieee80211_local *local = 4083 container_of(work, struct ieee80211_local, radar_detected_work); 4084 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 4085 struct ieee80211_chanctx *ctx; 4086 int num_chanctx = 0; 4087 4088 mutex_lock(&local->chanctx_mtx); 4089 list_for_each_entry(ctx, &local->chanctx_list, list) { 4090 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 4091 continue; 4092 4093 num_chanctx++; 4094 chandef = ctx->conf.def; 4095 } 4096 mutex_unlock(&local->chanctx_mtx); 4097 4098 wiphy_lock(local->hw.wiphy); 4099 ieee80211_dfs_cac_cancel(local); 4100 wiphy_unlock(local->hw.wiphy); 4101 4102 if (num_chanctx > 1) 4103 /* XXX: multi-channel is not supported yet */ 4104 WARN_ON(1); 4105 else 4106 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 4107 } 4108 4109 void ieee80211_radar_detected(struct ieee80211_hw *hw) 4110 { 4111 struct ieee80211_local *local = hw_to_local(hw); 4112 4113 trace_api_radar_detected(local); 4114 4115 schedule_work(&local->radar_detected_work); 4116 } 4117 EXPORT_SYMBOL(ieee80211_radar_detected); 4118 4119 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 4120 { 4121 ieee80211_conn_flags_t ret; 4122 int tmp; 4123 4124 switch (c->width) { 4125 case NL80211_CHAN_WIDTH_20: 4126 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4127 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4128 break; 4129 case NL80211_CHAN_WIDTH_40: 4130 c->width = NL80211_CHAN_WIDTH_20; 4131 c->center_freq1 = c->chan->center_freq; 4132 ret = IEEE80211_CONN_DISABLE_40MHZ | 4133 IEEE80211_CONN_DISABLE_VHT; 4134 break; 4135 case NL80211_CHAN_WIDTH_80: 4136 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 4137 /* n_P40 */ 4138 tmp /= 2; 4139 /* freq_P40 */ 4140 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 4141 c->width = NL80211_CHAN_WIDTH_40; 4142 ret = IEEE80211_CONN_DISABLE_VHT; 4143 break; 4144 case NL80211_CHAN_WIDTH_80P80: 4145 c->center_freq2 = 0; 4146 c->width = NL80211_CHAN_WIDTH_80; 4147 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4148 IEEE80211_CONN_DISABLE_160MHZ; 4149 break; 4150 case NL80211_CHAN_WIDTH_160: 4151 /* n_P20 */ 4152 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 4153 /* n_P80 */ 4154 tmp /= 4; 4155 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 4156 c->width = NL80211_CHAN_WIDTH_80; 4157 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4158 IEEE80211_CONN_DISABLE_160MHZ; 4159 break; 4160 case NL80211_CHAN_WIDTH_320: 4161 /* n_P20 */ 4162 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; 4163 /* n_P160 */ 4164 tmp /= 8; 4165 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp; 4166 c->width = NL80211_CHAN_WIDTH_160; 4167 ret = IEEE80211_CONN_DISABLE_320MHZ; 4168 break; 4169 default: 4170 case NL80211_CHAN_WIDTH_20_NOHT: 4171 WARN_ON_ONCE(1); 4172 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4173 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4174 break; 4175 case NL80211_CHAN_WIDTH_1: 4176 case NL80211_CHAN_WIDTH_2: 4177 case NL80211_CHAN_WIDTH_4: 4178 case NL80211_CHAN_WIDTH_8: 4179 case NL80211_CHAN_WIDTH_16: 4180 case NL80211_CHAN_WIDTH_5: 4181 case NL80211_CHAN_WIDTH_10: 4182 WARN_ON_ONCE(1); 4183 /* keep c->width */ 4184 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4185 break; 4186 } 4187 4188 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 4189 4190 return ret; 4191 } 4192 4193 /* 4194 * Returns true if smps_mode_new is strictly more restrictive than 4195 * smps_mode_old. 4196 */ 4197 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 4198 enum ieee80211_smps_mode smps_mode_new) 4199 { 4200 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 4201 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 4202 return false; 4203 4204 switch (smps_mode_old) { 4205 case IEEE80211_SMPS_STATIC: 4206 return false; 4207 case IEEE80211_SMPS_DYNAMIC: 4208 return smps_mode_new == IEEE80211_SMPS_STATIC; 4209 case IEEE80211_SMPS_OFF: 4210 return smps_mode_new != IEEE80211_SMPS_OFF; 4211 default: 4212 WARN_ON(1); 4213 } 4214 4215 return false; 4216 } 4217 4218 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 4219 struct cfg80211_csa_settings *csa_settings) 4220 { 4221 struct sk_buff *skb; 4222 struct ieee80211_mgmt *mgmt; 4223 struct ieee80211_local *local = sdata->local; 4224 int freq; 4225 int hdr_len = offsetofend(struct ieee80211_mgmt, 4226 u.action.u.chan_switch); 4227 u8 *pos; 4228 4229 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 4230 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 4231 return -EOPNOTSUPP; 4232 4233 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 4234 5 + /* channel switch announcement element */ 4235 3 + /* secondary channel offset element */ 4236 5 + /* wide bandwidth channel switch announcement */ 4237 8); /* mesh channel switch parameters element */ 4238 if (!skb) 4239 return -ENOMEM; 4240 4241 skb_reserve(skb, local->tx_headroom); 4242 mgmt = skb_put_zero(skb, hdr_len); 4243 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 4244 IEEE80211_STYPE_ACTION); 4245 4246 eth_broadcast_addr(mgmt->da); 4247 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 4248 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4249 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 4250 } else { 4251 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 4252 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 4253 } 4254 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 4255 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 4256 pos = skb_put(skb, 5); 4257 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 4258 *pos++ = 3; /* IE length */ 4259 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 4260 freq = csa_settings->chandef.chan->center_freq; 4261 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 4262 *pos++ = csa_settings->count; /* count */ 4263 4264 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 4265 enum nl80211_channel_type ch_type; 4266 4267 skb_put(skb, 3); 4268 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 4269 *pos++ = 1; /* IE length */ 4270 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 4271 if (ch_type == NL80211_CHAN_HT40PLUS) 4272 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 4273 else 4274 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 4275 } 4276 4277 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4278 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 4279 4280 skb_put(skb, 8); 4281 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 4282 *pos++ = 6; /* IE length */ 4283 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 4284 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 4285 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 4286 *pos++ |= csa_settings->block_tx ? 4287 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 4288 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 4289 pos += 2; 4290 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 4291 pos += 2; 4292 } 4293 4294 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 4295 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 4296 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 4297 skb_put(skb, 5); 4298 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 4299 } 4300 4301 ieee80211_tx_skb(sdata, skb); 4302 return 0; 4303 } 4304 4305 static bool 4306 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 4307 { 4308 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 4309 int skip; 4310 4311 if (end > 0) 4312 return false; 4313 4314 /* One shot NOA */ 4315 if (data->count[i] == 1) 4316 return false; 4317 4318 if (data->desc[i].interval == 0) 4319 return false; 4320 4321 /* End time is in the past, check for repetitions */ 4322 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4323 if (data->count[i] < 255) { 4324 if (data->count[i] <= skip) { 4325 data->count[i] = 0; 4326 return false; 4327 } 4328 4329 data->count[i] -= skip; 4330 } 4331 4332 data->desc[i].start += skip * data->desc[i].interval; 4333 4334 return true; 4335 } 4336 4337 static bool 4338 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4339 s32 *offset) 4340 { 4341 bool ret = false; 4342 int i; 4343 4344 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4345 s32 cur; 4346 4347 if (!data->count[i]) 4348 continue; 4349 4350 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4351 ret = true; 4352 4353 cur = data->desc[i].start - tsf; 4354 if (cur > *offset) 4355 continue; 4356 4357 cur = data->desc[i].start + data->desc[i].duration - tsf; 4358 if (cur > *offset) 4359 *offset = cur; 4360 } 4361 4362 return ret; 4363 } 4364 4365 static u32 4366 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4367 { 4368 s32 offset = 0; 4369 int tries = 0; 4370 /* 4371 * arbitrary limit, used to avoid infinite loops when combined NoA 4372 * descriptors cover the full time period. 4373 */ 4374 int max_tries = 5; 4375 4376 ieee80211_extend_absent_time(data, tsf, &offset); 4377 do { 4378 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4379 break; 4380 4381 tries++; 4382 } while (tries < max_tries); 4383 4384 return offset; 4385 } 4386 4387 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4388 { 4389 u32 next_offset = BIT(31) - 1; 4390 int i; 4391 4392 data->absent = 0; 4393 data->has_next_tsf = false; 4394 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4395 s32 start; 4396 4397 if (!data->count[i]) 4398 continue; 4399 4400 ieee80211_extend_noa_desc(data, tsf, i); 4401 start = data->desc[i].start - tsf; 4402 if (start <= 0) 4403 data->absent |= BIT(i); 4404 4405 if (next_offset > start) 4406 next_offset = start; 4407 4408 data->has_next_tsf = true; 4409 } 4410 4411 if (data->absent) 4412 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4413 4414 data->next_tsf = tsf + next_offset; 4415 } 4416 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4417 4418 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4419 struct ieee80211_noa_data *data, u32 tsf) 4420 { 4421 int ret = 0; 4422 int i; 4423 4424 memset(data, 0, sizeof(*data)); 4425 4426 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4427 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4428 4429 if (!desc->count || !desc->duration) 4430 continue; 4431 4432 data->count[i] = desc->count; 4433 data->desc[i].start = le32_to_cpu(desc->start_time); 4434 data->desc[i].duration = le32_to_cpu(desc->duration); 4435 data->desc[i].interval = le32_to_cpu(desc->interval); 4436 4437 if (data->count[i] > 1 && 4438 data->desc[i].interval < data->desc[i].duration) 4439 continue; 4440 4441 ieee80211_extend_noa_desc(data, tsf, i); 4442 ret++; 4443 } 4444 4445 if (ret) 4446 ieee80211_update_p2p_noa(data, tsf); 4447 4448 return ret; 4449 } 4450 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4451 4452 void ieee80211_recalc_dtim(struct ieee80211_local *local, 4453 struct ieee80211_sub_if_data *sdata) 4454 { 4455 u64 tsf = drv_get_tsf(local, sdata); 4456 u64 dtim_count = 0; 4457 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4458 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4459 struct ps_data *ps; 4460 u8 bcns_from_dtim; 4461 4462 if (tsf == -1ULL || !beacon_int || !dtim_period) 4463 return; 4464 4465 if (sdata->vif.type == NL80211_IFTYPE_AP || 4466 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4467 if (!sdata->bss) 4468 return; 4469 4470 ps = &sdata->bss->ps; 4471 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4472 ps = &sdata->u.mesh.ps; 4473 } else { 4474 return; 4475 } 4476 4477 /* 4478 * actually finds last dtim_count, mac80211 will update in 4479 * __beacon_add_tim(). 4480 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4481 */ 4482 do_div(tsf, beacon_int); 4483 bcns_from_dtim = do_div(tsf, dtim_period); 4484 /* just had a DTIM */ 4485 if (!bcns_from_dtim) 4486 dtim_count = 0; 4487 else 4488 dtim_count = dtim_period - bcns_from_dtim; 4489 4490 ps->dtim_count = dtim_count; 4491 } 4492 4493 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4494 struct ieee80211_chanctx *ctx) 4495 { 4496 struct ieee80211_link_data *link; 4497 u8 radar_detect = 0; 4498 4499 lockdep_assert_held(&local->chanctx_mtx); 4500 4501 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4502 return 0; 4503 4504 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list) 4505 if (link->reserved_radar_required) 4506 radar_detect |= BIT(link->reserved_chandef.width); 4507 4508 /* 4509 * An in-place reservation context should not have any assigned vifs 4510 * until it replaces the other context. 4511 */ 4512 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 4513 !list_empty(&ctx->assigned_links)); 4514 4515 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) { 4516 if (!link->radar_required) 4517 continue; 4518 4519 radar_detect |= 4520 BIT(link->conf->chandef.width); 4521 } 4522 4523 return radar_detect; 4524 } 4525 4526 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4527 const struct cfg80211_chan_def *chandef, 4528 enum ieee80211_chanctx_mode chanmode, 4529 u8 radar_detect) 4530 { 4531 struct ieee80211_local *local = sdata->local; 4532 struct ieee80211_sub_if_data *sdata_iter; 4533 enum nl80211_iftype iftype = sdata->wdev.iftype; 4534 struct ieee80211_chanctx *ctx; 4535 int total = 1; 4536 struct iface_combination_params params = { 4537 .radar_detect = radar_detect, 4538 }; 4539 4540 lockdep_assert_held(&local->chanctx_mtx); 4541 4542 if (WARN_ON(hweight32(radar_detect) > 1)) 4543 return -EINVAL; 4544 4545 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4546 !chandef->chan)) 4547 return -EINVAL; 4548 4549 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4550 return -EINVAL; 4551 4552 if (sdata->vif.type == NL80211_IFTYPE_AP || 4553 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4554 /* 4555 * always passing this is harmless, since it'll be the 4556 * same value that cfg80211 finds if it finds the same 4557 * interface ... and that's always allowed 4558 */ 4559 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4560 } 4561 4562 /* Always allow software iftypes */ 4563 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4564 if (radar_detect) 4565 return -EINVAL; 4566 return 0; 4567 } 4568 4569 if (chandef) 4570 params.num_different_channels = 1; 4571 4572 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4573 params.iftype_num[iftype] = 1; 4574 4575 list_for_each_entry(ctx, &local->chanctx_list, list) { 4576 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4577 continue; 4578 params.radar_detect |= 4579 ieee80211_chanctx_radar_detect(local, ctx); 4580 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 4581 params.num_different_channels++; 4582 continue; 4583 } 4584 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4585 cfg80211_chandef_compatible(chandef, 4586 &ctx->conf.def)) 4587 continue; 4588 params.num_different_channels++; 4589 } 4590 4591 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 4592 struct wireless_dev *wdev_iter; 4593 4594 wdev_iter = &sdata_iter->wdev; 4595 4596 if (sdata_iter == sdata || 4597 !ieee80211_sdata_running(sdata_iter) || 4598 cfg80211_iftype_allowed(local->hw.wiphy, 4599 wdev_iter->iftype, 0, 1)) 4600 continue; 4601 4602 params.iftype_num[wdev_iter->iftype]++; 4603 total++; 4604 } 4605 4606 if (total == 1 && !params.radar_detect) 4607 return 0; 4608 4609 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4610 } 4611 4612 static void 4613 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4614 void *data) 4615 { 4616 u32 *max_num_different_channels = data; 4617 4618 *max_num_different_channels = max(*max_num_different_channels, 4619 c->num_different_channels); 4620 } 4621 4622 int ieee80211_max_num_channels(struct ieee80211_local *local) 4623 { 4624 struct ieee80211_sub_if_data *sdata; 4625 struct ieee80211_chanctx *ctx; 4626 u32 max_num_different_channels = 1; 4627 int err; 4628 struct iface_combination_params params = {0}; 4629 4630 lockdep_assert_held(&local->chanctx_mtx); 4631 4632 list_for_each_entry(ctx, &local->chanctx_list, list) { 4633 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4634 continue; 4635 4636 params.num_different_channels++; 4637 4638 params.radar_detect |= 4639 ieee80211_chanctx_radar_detect(local, ctx); 4640 } 4641 4642 list_for_each_entry_rcu(sdata, &local->interfaces, list) 4643 params.iftype_num[sdata->wdev.iftype]++; 4644 4645 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4646 ieee80211_iter_max_chans, 4647 &max_num_different_channels); 4648 if (err < 0) 4649 return err; 4650 4651 return max_num_different_channels; 4652 } 4653 4654 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4655 struct ieee80211_sta_s1g_cap *caps, 4656 struct sk_buff *skb) 4657 { 4658 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4659 struct ieee80211_s1g_cap s1g_capab; 4660 u8 *pos; 4661 int i; 4662 4663 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4664 return; 4665 4666 if (!caps->s1g) 4667 return; 4668 4669 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4670 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4671 4672 /* override the capability info */ 4673 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4674 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4675 4676 s1g_capab.capab_info[i] &= ~mask; 4677 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4678 } 4679 4680 /* then MCS and NSS set */ 4681 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4682 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4683 4684 s1g_capab.supp_mcs_nss[i] &= ~mask; 4685 s1g_capab.supp_mcs_nss[i] |= 4686 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4687 } 4688 4689 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4690 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4691 *pos++ = sizeof(s1g_capab); 4692 4693 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4694 } 4695 4696 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4697 struct sk_buff *skb) 4698 { 4699 u8 *pos = skb_put(skb, 3); 4700 4701 *pos++ = WLAN_EID_AID_REQUEST; 4702 *pos++ = 1; 4703 *pos++ = 0; 4704 } 4705 4706 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4707 { 4708 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4709 *buf++ = 7; /* len */ 4710 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4711 *buf++ = 0x50; 4712 *buf++ = 0xf2; 4713 *buf++ = 2; /* WME */ 4714 *buf++ = 0; /* WME info */ 4715 *buf++ = 1; /* WME ver */ 4716 *buf++ = qosinfo; /* U-APSD no in use */ 4717 4718 return buf; 4719 } 4720 4721 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4722 unsigned long *frame_cnt, 4723 unsigned long *byte_cnt) 4724 { 4725 struct txq_info *txqi = to_txq_info(txq); 4726 u32 frag_cnt = 0, frag_bytes = 0; 4727 struct sk_buff *skb; 4728 4729 skb_queue_walk(&txqi->frags, skb) { 4730 frag_cnt++; 4731 frag_bytes += skb->len; 4732 } 4733 4734 if (frame_cnt) 4735 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4736 4737 if (byte_cnt) 4738 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4739 } 4740 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4741 4742 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4743 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4744 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4745 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4746 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4747 }; 4748 4749 u16 ieee80211_encode_usf(int listen_interval) 4750 { 4751 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4752 u16 ui, usf = 0; 4753 4754 /* find greatest USF */ 4755 while (usf < IEEE80211_MAX_USF) { 4756 if (listen_interval % listen_int_usf[usf + 1]) 4757 break; 4758 usf += 1; 4759 } 4760 ui = listen_interval / listen_int_usf[usf]; 4761 4762 /* error if there is a remainder. Should've been checked by user */ 4763 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4764 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4765 FIELD_PREP(LISTEN_INT_UI, ui); 4766 4767 return (u16) listen_interval; 4768 } 4769 4770 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 4771 { 4772 const struct ieee80211_sta_he_cap *he_cap; 4773 const struct ieee80211_sta_eht_cap *eht_cap; 4774 struct ieee80211_supported_band *sband; 4775 bool is_ap; 4776 u8 n; 4777 4778 sband = ieee80211_get_sband(sdata); 4779 if (!sband) 4780 return 0; 4781 4782 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 4783 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 4784 if (!he_cap || !eht_cap) 4785 return 0; 4786 4787 is_ap = iftype == NL80211_IFTYPE_AP || 4788 iftype == NL80211_IFTYPE_P2P_GO; 4789 4790 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4791 &eht_cap->eht_cap_elem, 4792 is_ap); 4793 return 2 + 1 + 4794 sizeof(he_cap->he_cap_elem) + n + 4795 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4796 eht_cap->eht_cap_elem.phy_cap_info); 4797 return 0; 4798 } 4799 4800 u8 *ieee80211_ie_build_eht_cap(u8 *pos, 4801 const struct ieee80211_sta_he_cap *he_cap, 4802 const struct ieee80211_sta_eht_cap *eht_cap, 4803 u8 *end, 4804 bool for_ap) 4805 { 4806 u8 mcs_nss_len, ppet_len; 4807 u8 ie_len; 4808 u8 *orig_pos = pos; 4809 4810 /* Make sure we have place for the IE */ 4811 if (!he_cap || !eht_cap) 4812 return orig_pos; 4813 4814 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4815 &eht_cap->eht_cap_elem, 4816 for_ap); 4817 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4818 eht_cap->eht_cap_elem.phy_cap_info); 4819 4820 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4821 if ((end - pos) < ie_len) 4822 return orig_pos; 4823 4824 *pos++ = WLAN_EID_EXTENSION; 4825 *pos++ = ie_len - 2; 4826 *pos++ = WLAN_EID_EXT_EHT_CAPABILITY; 4827 4828 /* Fixed data */ 4829 memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem)); 4830 pos += sizeof(eht_cap->eht_cap_elem); 4831 4832 memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4833 pos += mcs_nss_len; 4834 4835 if (ppet_len) { 4836 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len); 4837 pos += ppet_len; 4838 } 4839 4840 return pos; 4841 } 4842 4843 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos) 4844 { 4845 unsigned int elem_len; 4846 4847 if (!len_pos) 4848 return; 4849 4850 elem_len = skb->data + skb->len - len_pos - 1; 4851 4852 while (elem_len > 255) { 4853 /* this one is 255 */ 4854 *len_pos = 255; 4855 /* remaining data gets smaller */ 4856 elem_len -= 255; 4857 /* make space for the fragment ID/len in SKB */ 4858 skb_put(skb, 2); 4859 /* shift back the remaining data to place fragment ID/len */ 4860 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 4861 /* place the fragment ID */ 4862 len_pos += 255 + 1; 4863 *len_pos = WLAN_EID_FRAGMENT; 4864 /* and point to fragment length to update later */ 4865 len_pos++; 4866 } 4867 4868 *len_pos = elem_len; 4869 } 4870