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 sdata->vif.txqs_stopped[ac] = false; 305 306 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state)) 307 goto out; 308 309 if (sdata->vif.type == NL80211_IFTYPE_AP) 310 ps = &sdata->bss->ps; 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 ieee80211_parse_extension_element(u32 *crc, 958 const struct element *elem, 959 struct ieee802_11_elems *elems) 960 { 961 const void *data = elem->data + 1; 962 u8 len; 963 964 if (!elem->datalen) 965 return; 966 967 len = elem->datalen - 1; 968 969 switch (elem->data[0]) { 970 case WLAN_EID_EXT_HE_MU_EDCA: 971 if (len >= sizeof(*elems->mu_edca_param_set)) { 972 elems->mu_edca_param_set = data; 973 if (crc) 974 *crc = crc32_be(*crc, (void *)elem, 975 elem->datalen + 2); 976 } 977 break; 978 case WLAN_EID_EXT_HE_CAPABILITY: 979 if (ieee80211_he_capa_size_ok(data, len)) { 980 elems->he_cap = data; 981 elems->he_cap_len = len; 982 } 983 break; 984 case WLAN_EID_EXT_HE_OPERATION: 985 if (len >= sizeof(*elems->he_operation) && 986 len >= ieee80211_he_oper_size(data) - 1) { 987 if (crc) 988 *crc = crc32_be(*crc, (void *)elem, 989 elem->datalen + 2); 990 elems->he_operation = data; 991 } 992 break; 993 case WLAN_EID_EXT_UORA: 994 if (len >= 1) 995 elems->uora_element = data; 996 break; 997 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 998 if (len == 3) 999 elems->max_channel_switch_time = data; 1000 break; 1001 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 1002 if (len >= sizeof(*elems->mbssid_config_ie)) 1003 elems->mbssid_config_ie = data; 1004 break; 1005 case WLAN_EID_EXT_HE_SPR: 1006 if (len >= sizeof(*elems->he_spr) && 1007 len >= ieee80211_he_spr_size(data)) 1008 elems->he_spr = data; 1009 break; 1010 case WLAN_EID_EXT_HE_6GHZ_CAPA: 1011 if (len >= sizeof(*elems->he_6ghz_capa)) 1012 elems->he_6ghz_capa = data; 1013 break; 1014 case WLAN_EID_EXT_EHT_CAPABILITY: 1015 if (ieee80211_eht_capa_size_ok(elems->he_cap, 1016 data, len)) { 1017 elems->eht_cap = data; 1018 elems->eht_cap_len = len; 1019 } 1020 break; 1021 case WLAN_EID_EXT_EHT_OPERATION: 1022 if (ieee80211_eht_oper_size_ok(data, len)) 1023 elems->eht_operation = data; 1024 break; 1025 case WLAN_EID_EXT_EHT_MULTI_LINK: 1026 if (ieee80211_mle_size_ok(data, len)) 1027 elems->multi_link = (void *)data; 1028 break; 1029 } 1030 } 1031 1032 static u32 1033 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params, 1034 struct ieee802_11_elems *elems, 1035 const struct element *check_inherit) 1036 { 1037 const struct element *elem; 1038 bool calc_crc = params->filter != 0; 1039 DECLARE_BITMAP(seen_elems, 256); 1040 u32 crc = params->crc; 1041 const u8 *ie; 1042 1043 bitmap_zero(seen_elems, 256); 1044 1045 for_each_element(elem, params->start, params->len) { 1046 bool elem_parse_failed; 1047 u8 id = elem->id; 1048 u8 elen = elem->datalen; 1049 const u8 *pos = elem->data; 1050 1051 if (check_inherit && 1052 !cfg80211_is_element_inherited(elem, 1053 check_inherit)) 1054 continue; 1055 1056 switch (id) { 1057 case WLAN_EID_SSID: 1058 case WLAN_EID_SUPP_RATES: 1059 case WLAN_EID_FH_PARAMS: 1060 case WLAN_EID_DS_PARAMS: 1061 case WLAN_EID_CF_PARAMS: 1062 case WLAN_EID_TIM: 1063 case WLAN_EID_IBSS_PARAMS: 1064 case WLAN_EID_CHALLENGE: 1065 case WLAN_EID_RSN: 1066 case WLAN_EID_ERP_INFO: 1067 case WLAN_EID_EXT_SUPP_RATES: 1068 case WLAN_EID_HT_CAPABILITY: 1069 case WLAN_EID_HT_OPERATION: 1070 case WLAN_EID_VHT_CAPABILITY: 1071 case WLAN_EID_VHT_OPERATION: 1072 case WLAN_EID_MESH_ID: 1073 case WLAN_EID_MESH_CONFIG: 1074 case WLAN_EID_PEER_MGMT: 1075 case WLAN_EID_PREQ: 1076 case WLAN_EID_PREP: 1077 case WLAN_EID_PERR: 1078 case WLAN_EID_RANN: 1079 case WLAN_EID_CHANNEL_SWITCH: 1080 case WLAN_EID_EXT_CHANSWITCH_ANN: 1081 case WLAN_EID_COUNTRY: 1082 case WLAN_EID_PWR_CONSTRAINT: 1083 case WLAN_EID_TIMEOUT_INTERVAL: 1084 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1085 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1086 case WLAN_EID_CHAN_SWITCH_PARAM: 1087 case WLAN_EID_EXT_CAPABILITY: 1088 case WLAN_EID_CHAN_SWITCH_TIMING: 1089 case WLAN_EID_LINK_ID: 1090 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1091 case WLAN_EID_RSNX: 1092 case WLAN_EID_S1G_BCN_COMPAT: 1093 case WLAN_EID_S1G_CAPABILITIES: 1094 case WLAN_EID_S1G_OPERATION: 1095 case WLAN_EID_AID_RESPONSE: 1096 case WLAN_EID_S1G_SHORT_BCN_INTERVAL: 1097 /* 1098 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1099 * that if the content gets bigger it might be needed more than once 1100 */ 1101 if (test_bit(id, seen_elems)) { 1102 elems->parse_error = true; 1103 continue; 1104 } 1105 break; 1106 } 1107 1108 if (calc_crc && id < 64 && (params->filter & (1ULL << id))) 1109 crc = crc32_be(crc, pos - 2, elen + 2); 1110 1111 elem_parse_failed = false; 1112 1113 switch (id) { 1114 case WLAN_EID_LINK_ID: 1115 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) { 1116 elem_parse_failed = true; 1117 break; 1118 } 1119 elems->lnk_id = (void *)(pos - 2); 1120 break; 1121 case WLAN_EID_CHAN_SWITCH_TIMING: 1122 if (elen < sizeof(struct ieee80211_ch_switch_timing)) { 1123 elem_parse_failed = true; 1124 break; 1125 } 1126 elems->ch_sw_timing = (void *)pos; 1127 break; 1128 case WLAN_EID_EXT_CAPABILITY: 1129 elems->ext_capab = pos; 1130 elems->ext_capab_len = elen; 1131 break; 1132 case WLAN_EID_SSID: 1133 elems->ssid = pos; 1134 elems->ssid_len = elen; 1135 break; 1136 case WLAN_EID_SUPP_RATES: 1137 elems->supp_rates = pos; 1138 elems->supp_rates_len = elen; 1139 break; 1140 case WLAN_EID_DS_PARAMS: 1141 if (elen >= 1) 1142 elems->ds_params = pos; 1143 else 1144 elem_parse_failed = true; 1145 break; 1146 case WLAN_EID_TIM: 1147 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1148 elems->tim = (void *)pos; 1149 elems->tim_len = elen; 1150 } else 1151 elem_parse_failed = true; 1152 break; 1153 case WLAN_EID_VENDOR_SPECIFIC: 1154 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1155 pos[2] == 0xf2) { 1156 /* Microsoft OUI (00:50:F2) */ 1157 1158 if (calc_crc) 1159 crc = crc32_be(crc, pos - 2, elen + 2); 1160 1161 if (elen >= 5 && pos[3] == 2) { 1162 /* OUI Type 2 - WMM IE */ 1163 if (pos[4] == 0) { 1164 elems->wmm_info = pos; 1165 elems->wmm_info_len = elen; 1166 } else if (pos[4] == 1) { 1167 elems->wmm_param = pos; 1168 elems->wmm_param_len = elen; 1169 } 1170 } 1171 } 1172 break; 1173 case WLAN_EID_RSN: 1174 elems->rsn = pos; 1175 elems->rsn_len = elen; 1176 break; 1177 case WLAN_EID_ERP_INFO: 1178 if (elen >= 1) 1179 elems->erp_info = pos; 1180 else 1181 elem_parse_failed = true; 1182 break; 1183 case WLAN_EID_EXT_SUPP_RATES: 1184 elems->ext_supp_rates = pos; 1185 elems->ext_supp_rates_len = elen; 1186 break; 1187 case WLAN_EID_HT_CAPABILITY: 1188 if (elen >= sizeof(struct ieee80211_ht_cap)) 1189 elems->ht_cap_elem = (void *)pos; 1190 else 1191 elem_parse_failed = true; 1192 break; 1193 case WLAN_EID_HT_OPERATION: 1194 if (elen >= sizeof(struct ieee80211_ht_operation)) 1195 elems->ht_operation = (void *)pos; 1196 else 1197 elem_parse_failed = true; 1198 break; 1199 case WLAN_EID_VHT_CAPABILITY: 1200 if (elen >= sizeof(struct ieee80211_vht_cap)) 1201 elems->vht_cap_elem = (void *)pos; 1202 else 1203 elem_parse_failed = true; 1204 break; 1205 case WLAN_EID_VHT_OPERATION: 1206 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1207 elems->vht_operation = (void *)pos; 1208 if (calc_crc) 1209 crc = crc32_be(crc, pos - 2, elen + 2); 1210 break; 1211 } 1212 elem_parse_failed = true; 1213 break; 1214 case WLAN_EID_OPMODE_NOTIF: 1215 if (elen > 0) { 1216 elems->opmode_notif = pos; 1217 if (calc_crc) 1218 crc = crc32_be(crc, pos - 2, elen + 2); 1219 break; 1220 } 1221 elem_parse_failed = true; 1222 break; 1223 case WLAN_EID_MESH_ID: 1224 elems->mesh_id = pos; 1225 elems->mesh_id_len = elen; 1226 break; 1227 case WLAN_EID_MESH_CONFIG: 1228 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1229 elems->mesh_config = (void *)pos; 1230 else 1231 elem_parse_failed = true; 1232 break; 1233 case WLAN_EID_PEER_MGMT: 1234 elems->peering = pos; 1235 elems->peering_len = elen; 1236 break; 1237 case WLAN_EID_MESH_AWAKE_WINDOW: 1238 if (elen >= 2) 1239 elems->awake_window = (void *)pos; 1240 break; 1241 case WLAN_EID_PREQ: 1242 elems->preq = pos; 1243 elems->preq_len = elen; 1244 break; 1245 case WLAN_EID_PREP: 1246 elems->prep = pos; 1247 elems->prep_len = elen; 1248 break; 1249 case WLAN_EID_PERR: 1250 elems->perr = pos; 1251 elems->perr_len = elen; 1252 break; 1253 case WLAN_EID_RANN: 1254 if (elen >= sizeof(struct ieee80211_rann_ie)) 1255 elems->rann = (void *)pos; 1256 else 1257 elem_parse_failed = true; 1258 break; 1259 case WLAN_EID_CHANNEL_SWITCH: 1260 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1261 elem_parse_failed = true; 1262 break; 1263 } 1264 elems->ch_switch_ie = (void *)pos; 1265 break; 1266 case WLAN_EID_EXT_CHANSWITCH_ANN: 1267 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1268 elem_parse_failed = true; 1269 break; 1270 } 1271 elems->ext_chansw_ie = (void *)pos; 1272 break; 1273 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1274 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1275 elem_parse_failed = true; 1276 break; 1277 } 1278 elems->sec_chan_offs = (void *)pos; 1279 break; 1280 case WLAN_EID_CHAN_SWITCH_PARAM: 1281 if (elen < 1282 sizeof(*elems->mesh_chansw_params_ie)) { 1283 elem_parse_failed = true; 1284 break; 1285 } 1286 elems->mesh_chansw_params_ie = (void *)pos; 1287 break; 1288 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1289 if (!params->action || 1290 elen < sizeof(*elems->wide_bw_chansw_ie)) { 1291 elem_parse_failed = true; 1292 break; 1293 } 1294 elems->wide_bw_chansw_ie = (void *)pos; 1295 break; 1296 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1297 if (params->action) { 1298 elem_parse_failed = true; 1299 break; 1300 } 1301 /* 1302 * This is a bit tricky, but as we only care about 1303 * the wide bandwidth channel switch element, so 1304 * just parse it out manually. 1305 */ 1306 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1307 pos, elen); 1308 if (ie) { 1309 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie)) 1310 elems->wide_bw_chansw_ie = 1311 (void *)(ie + 2); 1312 else 1313 elem_parse_failed = true; 1314 } 1315 break; 1316 case WLAN_EID_COUNTRY: 1317 elems->country_elem = pos; 1318 elems->country_elem_len = elen; 1319 break; 1320 case WLAN_EID_PWR_CONSTRAINT: 1321 if (elen != 1) { 1322 elem_parse_failed = true; 1323 break; 1324 } 1325 elems->pwr_constr_elem = pos; 1326 break; 1327 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1328 /* Lots of different options exist, but we only care 1329 * about the Dynamic Transmit Power Control element. 1330 * First check for the Cisco OUI, then for the DTPC 1331 * tag (0x00). 1332 */ 1333 if (elen < 4) { 1334 elem_parse_failed = true; 1335 break; 1336 } 1337 1338 if (pos[0] != 0x00 || pos[1] != 0x40 || 1339 pos[2] != 0x96 || pos[3] != 0x00) 1340 break; 1341 1342 if (elen != 6) { 1343 elem_parse_failed = true; 1344 break; 1345 } 1346 1347 if (calc_crc) 1348 crc = crc32_be(crc, pos - 2, elen + 2); 1349 1350 elems->cisco_dtpc_elem = pos; 1351 break; 1352 case WLAN_EID_ADDBA_EXT: 1353 if (elen < sizeof(struct ieee80211_addba_ext_ie)) { 1354 elem_parse_failed = true; 1355 break; 1356 } 1357 elems->addba_ext_ie = (void *)pos; 1358 break; 1359 case WLAN_EID_TIMEOUT_INTERVAL: 1360 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1361 elems->timeout_int = (void *)pos; 1362 else 1363 elem_parse_failed = true; 1364 break; 1365 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1366 if (elen >= sizeof(*elems->max_idle_period_ie)) 1367 elems->max_idle_period_ie = (void *)pos; 1368 break; 1369 case WLAN_EID_RSNX: 1370 elems->rsnx = pos; 1371 elems->rsnx_len = elen; 1372 break; 1373 case WLAN_EID_TX_POWER_ENVELOPE: 1374 if (elen < 1 || 1375 elen > sizeof(struct ieee80211_tx_pwr_env)) 1376 break; 1377 1378 if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env)) 1379 break; 1380 1381 elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos; 1382 elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen; 1383 elems->tx_pwr_env_num++; 1384 break; 1385 case WLAN_EID_EXTENSION: 1386 ieee80211_parse_extension_element(calc_crc ? 1387 &crc : NULL, 1388 elem, elems); 1389 break; 1390 case WLAN_EID_S1G_CAPABILITIES: 1391 if (elen >= sizeof(*elems->s1g_capab)) 1392 elems->s1g_capab = (void *)pos; 1393 else 1394 elem_parse_failed = true; 1395 break; 1396 case WLAN_EID_S1G_OPERATION: 1397 if (elen == sizeof(*elems->s1g_oper)) 1398 elems->s1g_oper = (void *)pos; 1399 else 1400 elem_parse_failed = true; 1401 break; 1402 case WLAN_EID_S1G_BCN_COMPAT: 1403 if (elen == sizeof(*elems->s1g_bcn_compat)) 1404 elems->s1g_bcn_compat = (void *)pos; 1405 else 1406 elem_parse_failed = true; 1407 break; 1408 case WLAN_EID_AID_RESPONSE: 1409 if (elen == sizeof(struct ieee80211_aid_response_ie)) 1410 elems->aid_resp = (void *)pos; 1411 else 1412 elem_parse_failed = true; 1413 break; 1414 default: 1415 break; 1416 } 1417 1418 if (elem_parse_failed) 1419 elems->parse_error = true; 1420 else 1421 __set_bit(id, seen_elems); 1422 } 1423 1424 if (!for_each_element_completed(elem, params->start, params->len)) 1425 elems->parse_error = true; 1426 1427 return crc; 1428 } 1429 1430 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1431 struct ieee802_11_elems *elems, 1432 struct cfg80211_bss *bss, 1433 u8 *nontransmitted_profile) 1434 { 1435 const struct element *elem, *sub; 1436 size_t profile_len = 0; 1437 bool found = false; 1438 1439 if (!bss || !bss->transmitted_bss) 1440 return profile_len; 1441 1442 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1443 if (elem->datalen < 2) 1444 continue; 1445 1446 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1447 u8 new_bssid[ETH_ALEN]; 1448 const u8 *index; 1449 1450 if (sub->id != 0 || sub->datalen < 4) { 1451 /* not a valid BSS profile */ 1452 continue; 1453 } 1454 1455 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1456 sub->data[1] != 2) { 1457 /* The first element of the 1458 * Nontransmitted BSSID Profile is not 1459 * the Nontransmitted BSSID Capability 1460 * element. 1461 */ 1462 continue; 1463 } 1464 1465 memset(nontransmitted_profile, 0, len); 1466 profile_len = cfg80211_merge_profile(start, len, 1467 elem, 1468 sub, 1469 nontransmitted_profile, 1470 len); 1471 1472 /* found a Nontransmitted BSSID Profile */ 1473 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1474 nontransmitted_profile, 1475 profile_len); 1476 if (!index || index[1] < 1 || index[2] == 0) { 1477 /* Invalid MBSSID Index element */ 1478 continue; 1479 } 1480 1481 cfg80211_gen_new_bssid(bss->transmitted_bss->bssid, 1482 elem->data[0], 1483 index[2], 1484 new_bssid); 1485 if (ether_addr_equal(new_bssid, bss->bssid)) { 1486 found = true; 1487 elems->bssid_index_len = index[1]; 1488 elems->bssid_index = (void *)&index[2]; 1489 break; 1490 } 1491 } 1492 } 1493 1494 return found ? profile_len : 0; 1495 } 1496 1497 struct ieee802_11_elems * 1498 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params) 1499 { 1500 struct ieee802_11_elems *elems; 1501 const struct element *non_inherit = NULL; 1502 u8 *nontransmitted_profile; 1503 int nontransmitted_profile_len = 0; 1504 1505 elems = kzalloc(sizeof(*elems), GFP_ATOMIC); 1506 if (!elems) 1507 return NULL; 1508 elems->ie_start = params->start; 1509 elems->total_len = params->len; 1510 1511 nontransmitted_profile = kmalloc(params->len, GFP_ATOMIC); 1512 if (nontransmitted_profile) { 1513 nontransmitted_profile_len = 1514 ieee802_11_find_bssid_profile(params->start, params->len, 1515 elems, params->bss, 1516 nontransmitted_profile); 1517 non_inherit = 1518 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1519 nontransmitted_profile, 1520 nontransmitted_profile_len); 1521 } 1522 1523 elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit); 1524 1525 /* Override with nontransmitted profile, if found */ 1526 if (nontransmitted_profile_len) { 1527 struct ieee80211_elems_parse_params sub = { 1528 .start = nontransmitted_profile, 1529 .len = nontransmitted_profile_len, 1530 .action = params->action, 1531 .link_id = params->link_id, 1532 }; 1533 1534 _ieee802_11_parse_elems_full(&sub, elems, NULL); 1535 } 1536 1537 if (elems->tim && !elems->parse_error) { 1538 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1539 1540 elems->dtim_period = tim_ie->dtim_period; 1541 elems->dtim_count = tim_ie->dtim_count; 1542 } 1543 1544 /* Override DTIM period and count if needed */ 1545 if (elems->bssid_index && 1546 elems->bssid_index_len >= 1547 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1548 elems->dtim_period = elems->bssid_index->dtim_period; 1549 1550 if (elems->bssid_index && 1551 elems->bssid_index_len >= 1552 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1553 elems->dtim_count = elems->bssid_index->dtim_count; 1554 1555 kfree(nontransmitted_profile); 1556 1557 return elems; 1558 } 1559 1560 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1561 struct ieee80211_tx_queue_params 1562 *qparam, int ac) 1563 { 1564 struct ieee80211_chanctx_conf *chanctx_conf; 1565 const struct ieee80211_reg_rule *rrule; 1566 const struct ieee80211_wmm_ac *wmm_ac; 1567 u16 center_freq = 0; 1568 1569 if (sdata->vif.type != NL80211_IFTYPE_AP && 1570 sdata->vif.type != NL80211_IFTYPE_STATION) 1571 return; 1572 1573 rcu_read_lock(); 1574 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1575 if (chanctx_conf) 1576 center_freq = chanctx_conf->def.chan->center_freq; 1577 1578 if (!center_freq) { 1579 rcu_read_unlock(); 1580 return; 1581 } 1582 1583 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1584 1585 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1586 rcu_read_unlock(); 1587 return; 1588 } 1589 1590 if (sdata->vif.type == NL80211_IFTYPE_AP) 1591 wmm_ac = &rrule->wmm_rule.ap[ac]; 1592 else 1593 wmm_ac = &rrule->wmm_rule.client[ac]; 1594 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1595 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1596 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1597 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1598 rcu_read_unlock(); 1599 } 1600 1601 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1602 bool bss_notify, bool enable_qos) 1603 { 1604 struct ieee80211_sub_if_data *sdata = link->sdata; 1605 struct ieee80211_local *local = sdata->local; 1606 struct ieee80211_tx_queue_params qparam; 1607 struct ieee80211_chanctx_conf *chanctx_conf; 1608 int ac; 1609 bool use_11b; 1610 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1611 int aCWmin, aCWmax; 1612 1613 if (!local->ops->conf_tx) 1614 return; 1615 1616 if (local->hw.queues < IEEE80211_NUM_ACS) 1617 return; 1618 1619 memset(&qparam, 0, sizeof(qparam)); 1620 1621 rcu_read_lock(); 1622 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1623 use_11b = (chanctx_conf && 1624 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1625 !link->operating_11g_mode; 1626 rcu_read_unlock(); 1627 1628 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1629 1630 /* Set defaults according to 802.11-2007 Table 7-37 */ 1631 aCWmax = 1023; 1632 if (use_11b) 1633 aCWmin = 31; 1634 else 1635 aCWmin = 15; 1636 1637 /* Confiure old 802.11b/g medium access rules. */ 1638 qparam.cw_max = aCWmax; 1639 qparam.cw_min = aCWmin; 1640 qparam.txop = 0; 1641 qparam.aifs = 2; 1642 1643 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1644 /* Update if QoS is enabled. */ 1645 if (enable_qos) { 1646 switch (ac) { 1647 case IEEE80211_AC_BK: 1648 qparam.cw_max = aCWmax; 1649 qparam.cw_min = aCWmin; 1650 qparam.txop = 0; 1651 if (is_ocb) 1652 qparam.aifs = 9; 1653 else 1654 qparam.aifs = 7; 1655 break; 1656 /* never happens but let's not leave undefined */ 1657 default: 1658 case IEEE80211_AC_BE: 1659 qparam.cw_max = aCWmax; 1660 qparam.cw_min = aCWmin; 1661 qparam.txop = 0; 1662 if (is_ocb) 1663 qparam.aifs = 6; 1664 else 1665 qparam.aifs = 3; 1666 break; 1667 case IEEE80211_AC_VI: 1668 qparam.cw_max = aCWmin; 1669 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1670 if (is_ocb) 1671 qparam.txop = 0; 1672 else if (use_11b) 1673 qparam.txop = 6016/32; 1674 else 1675 qparam.txop = 3008/32; 1676 1677 if (is_ocb) 1678 qparam.aifs = 3; 1679 else 1680 qparam.aifs = 2; 1681 break; 1682 case IEEE80211_AC_VO: 1683 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1684 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1685 if (is_ocb) 1686 qparam.txop = 0; 1687 else if (use_11b) 1688 qparam.txop = 3264/32; 1689 else 1690 qparam.txop = 1504/32; 1691 qparam.aifs = 2; 1692 break; 1693 } 1694 } 1695 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1696 1697 qparam.uapsd = false; 1698 1699 link->tx_conf[ac] = qparam; 1700 drv_conf_tx(local, link, ac, &qparam); 1701 } 1702 1703 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1704 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1705 sdata->vif.type != NL80211_IFTYPE_NAN) { 1706 link->conf->qos = enable_qos; 1707 if (bss_notify) 1708 ieee80211_link_info_change_notify(sdata, link, 1709 BSS_CHANGED_QOS); 1710 } 1711 } 1712 1713 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1714 u16 transaction, u16 auth_alg, u16 status, 1715 const u8 *extra, size_t extra_len, const u8 *da, 1716 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1717 u32 tx_flags) 1718 { 1719 struct ieee80211_local *local = sdata->local; 1720 struct sk_buff *skb; 1721 struct ieee80211_mgmt *mgmt; 1722 bool multi_link = sdata->vif.valid_links; 1723 struct { 1724 u8 id; 1725 u8 len; 1726 u8 ext_id; 1727 struct ieee80211_multi_link_elem ml; 1728 struct ieee80211_mle_basic_common_info basic; 1729 } __packed mle = { 1730 .id = WLAN_EID_EXTENSION, 1731 .len = sizeof(mle) - 2, 1732 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1733 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1734 .basic.len = sizeof(mle.basic), 1735 }; 1736 int err; 1737 1738 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1739 1740 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1741 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1742 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1743 multi_link * sizeof(mle)); 1744 if (!skb) 1745 return; 1746 1747 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1748 1749 mgmt = skb_put_zero(skb, 24 + 6); 1750 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1751 IEEE80211_STYPE_AUTH); 1752 memcpy(mgmt->da, da, ETH_ALEN); 1753 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1754 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1755 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1756 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1757 mgmt->u.auth.status_code = cpu_to_le16(status); 1758 if (extra) 1759 skb_put_data(skb, extra, extra_len); 1760 if (multi_link) 1761 skb_put_data(skb, &mle, sizeof(mle)); 1762 1763 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1764 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1765 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1766 if (WARN_ON(err)) { 1767 kfree_skb(skb); 1768 return; 1769 } 1770 } 1771 1772 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1773 tx_flags; 1774 ieee80211_tx_skb(sdata, skb); 1775 } 1776 1777 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1778 const u8 *da, const u8 *bssid, 1779 u16 stype, u16 reason, 1780 bool send_frame, u8 *frame_buf) 1781 { 1782 struct ieee80211_local *local = sdata->local; 1783 struct sk_buff *skb; 1784 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1785 1786 /* build frame */ 1787 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1788 mgmt->duration = 0; /* initialize only */ 1789 mgmt->seq_ctrl = 0; /* initialize only */ 1790 memcpy(mgmt->da, da, ETH_ALEN); 1791 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1792 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1793 /* u.deauth.reason_code == u.disassoc.reason_code */ 1794 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1795 1796 if (send_frame) { 1797 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1798 IEEE80211_DEAUTH_FRAME_LEN); 1799 if (!skb) 1800 return; 1801 1802 skb_reserve(skb, local->hw.extra_tx_headroom); 1803 1804 /* copy in frame */ 1805 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1806 1807 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1808 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1809 IEEE80211_SKB_CB(skb)->flags |= 1810 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1811 1812 ieee80211_tx_skb(sdata, skb); 1813 } 1814 } 1815 1816 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end) 1817 { 1818 if ((end - pos) < 5) 1819 return pos; 1820 1821 *pos++ = WLAN_EID_EXTENSION; 1822 *pos++ = 1 + sizeof(cap); 1823 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA; 1824 memcpy(pos, &cap, sizeof(cap)); 1825 1826 return pos + 2; 1827 } 1828 1829 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata, 1830 u8 *buffer, size_t buffer_len, 1831 const u8 *ie, size_t ie_len, 1832 enum nl80211_band band, 1833 u32 rate_mask, 1834 struct cfg80211_chan_def *chandef, 1835 size_t *offset, u32 flags) 1836 { 1837 struct ieee80211_local *local = sdata->local; 1838 struct ieee80211_supported_band *sband; 1839 const struct ieee80211_sta_he_cap *he_cap; 1840 const struct ieee80211_sta_eht_cap *eht_cap; 1841 u8 *pos = buffer, *end = buffer + buffer_len; 1842 size_t noffset; 1843 int supp_rates_len, i; 1844 u8 rates[32]; 1845 int num_rates; 1846 int ext_rates_len; 1847 int shift; 1848 u32 rate_flags; 1849 bool have_80mhz = false; 1850 1851 *offset = 0; 1852 1853 sband = local->hw.wiphy->bands[band]; 1854 if (WARN_ON_ONCE(!sband)) 1855 return 0; 1856 1857 rate_flags = ieee80211_chandef_rate_flags(chandef); 1858 shift = ieee80211_chandef_get_shift(chandef); 1859 1860 num_rates = 0; 1861 for (i = 0; i < sband->n_bitrates; i++) { 1862 if ((BIT(i) & rate_mask) == 0) 1863 continue; /* skip rate */ 1864 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1865 continue; 1866 1867 rates[num_rates++] = 1868 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1869 (1 << shift) * 5); 1870 } 1871 1872 supp_rates_len = min_t(int, num_rates, 8); 1873 1874 if (end - pos < 2 + supp_rates_len) 1875 goto out_err; 1876 *pos++ = WLAN_EID_SUPP_RATES; 1877 *pos++ = supp_rates_len; 1878 memcpy(pos, rates, supp_rates_len); 1879 pos += supp_rates_len; 1880 1881 /* insert "request information" if in custom IEs */ 1882 if (ie && ie_len) { 1883 static const u8 before_extrates[] = { 1884 WLAN_EID_SSID, 1885 WLAN_EID_SUPP_RATES, 1886 WLAN_EID_REQUEST, 1887 }; 1888 noffset = ieee80211_ie_split(ie, ie_len, 1889 before_extrates, 1890 ARRAY_SIZE(before_extrates), 1891 *offset); 1892 if (end - pos < noffset - *offset) 1893 goto out_err; 1894 memcpy(pos, ie + *offset, noffset - *offset); 1895 pos += noffset - *offset; 1896 *offset = noffset; 1897 } 1898 1899 ext_rates_len = num_rates - supp_rates_len; 1900 if (ext_rates_len > 0) { 1901 if (end - pos < 2 + ext_rates_len) 1902 goto out_err; 1903 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1904 *pos++ = ext_rates_len; 1905 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1906 pos += ext_rates_len; 1907 } 1908 1909 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1910 if (end - pos < 3) 1911 goto out_err; 1912 *pos++ = WLAN_EID_DS_PARAMS; 1913 *pos++ = 1; 1914 *pos++ = ieee80211_frequency_to_channel( 1915 chandef->chan->center_freq); 1916 } 1917 1918 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1919 goto done; 1920 1921 /* insert custom IEs that go before HT */ 1922 if (ie && ie_len) { 1923 static const u8 before_ht[] = { 1924 /* 1925 * no need to list the ones split off already 1926 * (or generated here) 1927 */ 1928 WLAN_EID_DS_PARAMS, 1929 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1930 }; 1931 noffset = ieee80211_ie_split(ie, ie_len, 1932 before_ht, ARRAY_SIZE(before_ht), 1933 *offset); 1934 if (end - pos < noffset - *offset) 1935 goto out_err; 1936 memcpy(pos, ie + *offset, noffset - *offset); 1937 pos += noffset - *offset; 1938 *offset = noffset; 1939 } 1940 1941 if (sband->ht_cap.ht_supported) { 1942 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1943 goto out_err; 1944 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1945 sband->ht_cap.cap); 1946 } 1947 1948 /* insert custom IEs that go before VHT */ 1949 if (ie && ie_len) { 1950 static const u8 before_vht[] = { 1951 /* 1952 * no need to list the ones split off already 1953 * (or generated here) 1954 */ 1955 WLAN_EID_BSS_COEX_2040, 1956 WLAN_EID_EXT_CAPABILITY, 1957 WLAN_EID_SSID_LIST, 1958 WLAN_EID_CHANNEL_USAGE, 1959 WLAN_EID_INTERWORKING, 1960 WLAN_EID_MESH_ID, 1961 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1962 }; 1963 noffset = ieee80211_ie_split(ie, ie_len, 1964 before_vht, ARRAY_SIZE(before_vht), 1965 *offset); 1966 if (end - pos < noffset - *offset) 1967 goto out_err; 1968 memcpy(pos, ie + *offset, noffset - *offset); 1969 pos += noffset - *offset; 1970 *offset = noffset; 1971 } 1972 1973 /* Check if any channel in this sband supports at least 80 MHz */ 1974 for (i = 0; i < sband->n_channels; i++) { 1975 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1976 IEEE80211_CHAN_NO_80MHZ)) 1977 continue; 1978 1979 have_80mhz = true; 1980 break; 1981 } 1982 1983 if (sband->vht_cap.vht_supported && have_80mhz) { 1984 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1985 goto out_err; 1986 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1987 sband->vht_cap.cap); 1988 } 1989 1990 /* insert custom IEs that go before HE */ 1991 if (ie && ie_len) { 1992 static const u8 before_he[] = { 1993 /* 1994 * no need to list the ones split off before VHT 1995 * or generated here 1996 */ 1997 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1998 WLAN_EID_AP_CSN, 1999 /* TODO: add 11ah/11aj/11ak elements */ 2000 }; 2001 noffset = ieee80211_ie_split(ie, ie_len, 2002 before_he, ARRAY_SIZE(before_he), 2003 *offset); 2004 if (end - pos < noffset - *offset) 2005 goto out_err; 2006 memcpy(pos, ie + *offset, noffset - *offset); 2007 pos += noffset - *offset; 2008 *offset = noffset; 2009 } 2010 2011 he_cap = ieee80211_get_he_iftype_cap(sband, 2012 ieee80211_vif_type_p2p(&sdata->vif)); 2013 if (he_cap && 2014 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2015 IEEE80211_CHAN_NO_HE)) { 2016 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end); 2017 if (!pos) 2018 goto out_err; 2019 } 2020 2021 eht_cap = ieee80211_get_eht_iftype_cap(sband, 2022 ieee80211_vif_type_p2p(&sdata->vif)); 2023 2024 if (eht_cap && 2025 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2026 IEEE80211_CHAN_NO_HE | 2027 IEEE80211_CHAN_NO_EHT)) { 2028 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end); 2029 if (!pos) 2030 goto out_err; 2031 } 2032 2033 if (cfg80211_any_usable_channels(local->hw.wiphy, 2034 BIT(NL80211_BAND_6GHZ), 2035 IEEE80211_CHAN_NO_HE)) { 2036 struct ieee80211_supported_band *sband6; 2037 2038 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2039 he_cap = ieee80211_get_he_iftype_cap(sband6, 2040 ieee80211_vif_type_p2p(&sdata->vif)); 2041 2042 if (he_cap) { 2043 enum nl80211_iftype iftype = 2044 ieee80211_vif_type_p2p(&sdata->vif); 2045 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype); 2046 2047 pos = ieee80211_write_he_6ghz_cap(pos, cap, end); 2048 } 2049 } 2050 2051 /* 2052 * If adding more here, adjust code in main.c 2053 * that calculates local->scan_ies_len. 2054 */ 2055 2056 return pos - buffer; 2057 out_err: 2058 WARN_ONCE(1, "not enough space for preq IEs\n"); 2059 done: 2060 return pos - buffer; 2061 } 2062 2063 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 2064 size_t buffer_len, 2065 struct ieee80211_scan_ies *ie_desc, 2066 const u8 *ie, size_t ie_len, 2067 u8 bands_used, u32 *rate_masks, 2068 struct cfg80211_chan_def *chandef, 2069 u32 flags) 2070 { 2071 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 2072 int i; 2073 2074 memset(ie_desc, 0, sizeof(*ie_desc)); 2075 2076 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2077 if (bands_used & BIT(i)) { 2078 pos += ieee80211_build_preq_ies_band(sdata, 2079 buffer + pos, 2080 buffer_len - pos, 2081 ie, ie_len, i, 2082 rate_masks[i], 2083 chandef, 2084 &custom_ie_offset, 2085 flags); 2086 ie_desc->ies[i] = buffer + old_pos; 2087 ie_desc->len[i] = pos - old_pos; 2088 old_pos = pos; 2089 } 2090 } 2091 2092 /* add any remaining custom IEs */ 2093 if (ie && ie_len) { 2094 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 2095 "not enough space for preq custom IEs\n")) 2096 return pos; 2097 memcpy(buffer + pos, ie + custom_ie_offset, 2098 ie_len - custom_ie_offset); 2099 ie_desc->common_ies = buffer + pos; 2100 ie_desc->common_ie_len = ie_len - custom_ie_offset; 2101 pos += ie_len - custom_ie_offset; 2102 } 2103 2104 return pos; 2105 }; 2106 2107 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 2108 const u8 *src, const u8 *dst, 2109 u32 ratemask, 2110 struct ieee80211_channel *chan, 2111 const u8 *ssid, size_t ssid_len, 2112 const u8 *ie, size_t ie_len, 2113 u32 flags) 2114 { 2115 struct ieee80211_local *local = sdata->local; 2116 struct cfg80211_chan_def chandef; 2117 struct sk_buff *skb; 2118 struct ieee80211_mgmt *mgmt; 2119 int ies_len; 2120 u32 rate_masks[NUM_NL80211_BANDS] = {}; 2121 struct ieee80211_scan_ies dummy_ie_desc; 2122 2123 /* 2124 * Do not send DS Channel parameter for directed probe requests 2125 * in order to maximize the chance that we get a response. Some 2126 * badly-behaved APs don't respond when this parameter is included. 2127 */ 2128 chandef.width = sdata->vif.bss_conf.chandef.width; 2129 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 2130 chandef.chan = NULL; 2131 else 2132 chandef.chan = chan; 2133 2134 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 2135 local->scan_ies_len + ie_len); 2136 if (!skb) 2137 return NULL; 2138 2139 rate_masks[chan->band] = ratemask; 2140 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb), 2141 skb_tailroom(skb), &dummy_ie_desc, 2142 ie, ie_len, BIT(chan->band), 2143 rate_masks, &chandef, flags); 2144 skb_put(skb, ies_len); 2145 2146 if (dst) { 2147 mgmt = (struct ieee80211_mgmt *) skb->data; 2148 memcpy(mgmt->da, dst, ETH_ALEN); 2149 memcpy(mgmt->bssid, dst, ETH_ALEN); 2150 } 2151 2152 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2153 2154 return skb; 2155 } 2156 2157 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 2158 struct ieee802_11_elems *elems, 2159 enum nl80211_band band, u32 *basic_rates) 2160 { 2161 struct ieee80211_supported_band *sband; 2162 size_t num_rates; 2163 u32 supp_rates, rate_flags; 2164 int i, j, shift; 2165 2166 sband = sdata->local->hw.wiphy->bands[band]; 2167 if (WARN_ON(!sband)) 2168 return 1; 2169 2170 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2171 shift = ieee80211_vif_get_shift(&sdata->vif); 2172 2173 num_rates = sband->n_bitrates; 2174 supp_rates = 0; 2175 for (i = 0; i < elems->supp_rates_len + 2176 elems->ext_supp_rates_len; i++) { 2177 u8 rate = 0; 2178 int own_rate; 2179 bool is_basic; 2180 if (i < elems->supp_rates_len) 2181 rate = elems->supp_rates[i]; 2182 else if (elems->ext_supp_rates) 2183 rate = elems->ext_supp_rates 2184 [i - elems->supp_rates_len]; 2185 own_rate = 5 * (rate & 0x7f); 2186 is_basic = !!(rate & 0x80); 2187 2188 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2189 continue; 2190 2191 for (j = 0; j < num_rates; j++) { 2192 int brate; 2193 if ((rate_flags & sband->bitrates[j].flags) 2194 != rate_flags) 2195 continue; 2196 2197 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 2198 1 << shift); 2199 2200 if (brate == own_rate) { 2201 supp_rates |= BIT(j); 2202 if (basic_rates && is_basic) 2203 *basic_rates |= BIT(j); 2204 } 2205 } 2206 } 2207 return supp_rates; 2208 } 2209 2210 void ieee80211_stop_device(struct ieee80211_local *local) 2211 { 2212 ieee80211_led_radio(local, false); 2213 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2214 2215 cancel_work_sync(&local->reconfig_filter); 2216 2217 flush_workqueue(local->workqueue); 2218 drv_stop(local); 2219 } 2220 2221 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2222 bool aborted) 2223 { 2224 /* It's possible that we don't handle the scan completion in 2225 * time during suspend, so if it's still marked as completed 2226 * here, queue the work and flush it to clean things up. 2227 * Instead of calling the worker function directly here, we 2228 * really queue it to avoid potential races with other flows 2229 * scheduling the same work. 2230 */ 2231 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2232 /* If coming from reconfiguration failure, abort the scan so 2233 * we don't attempt to continue a partial HW scan - which is 2234 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2235 * completed scan, and a 5 GHz portion is still pending. 2236 */ 2237 if (aborted) 2238 set_bit(SCAN_ABORTED, &local->scanning); 2239 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2240 flush_delayed_work(&local->scan_work); 2241 } 2242 } 2243 2244 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2245 { 2246 struct ieee80211_sub_if_data *sdata; 2247 struct ieee80211_chanctx *ctx; 2248 2249 /* 2250 * We get here if during resume the device can't be restarted properly. 2251 * We might also get here if this happens during HW reset, which is a 2252 * slightly different situation and we need to drop all connections in 2253 * the latter case. 2254 * 2255 * Ask cfg80211 to turn off all interfaces, this will result in more 2256 * warnings but at least we'll then get into a clean stopped state. 2257 */ 2258 2259 local->resuming = false; 2260 local->suspended = false; 2261 local->in_reconfig = false; 2262 2263 ieee80211_flush_completed_scan(local, true); 2264 2265 /* scheduled scan clearly can't be running any more, but tell 2266 * cfg80211 and clear local state 2267 */ 2268 ieee80211_sched_scan_end(local); 2269 2270 list_for_each_entry(sdata, &local->interfaces, list) 2271 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2272 2273 /* Mark channel contexts as not being in the driver any more to avoid 2274 * removing them from the driver during the shutdown process... 2275 */ 2276 mutex_lock(&local->chanctx_mtx); 2277 list_for_each_entry(ctx, &local->chanctx_list, list) 2278 ctx->driver_present = false; 2279 mutex_unlock(&local->chanctx_mtx); 2280 } 2281 2282 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2283 struct ieee80211_sub_if_data *sdata, 2284 struct ieee80211_link_data *link) 2285 { 2286 struct ieee80211_chanctx_conf *conf; 2287 struct ieee80211_chanctx *ctx; 2288 2289 if (!local->use_chanctx) 2290 return; 2291 2292 mutex_lock(&local->chanctx_mtx); 2293 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2294 lockdep_is_held(&local->chanctx_mtx)); 2295 if (conf) { 2296 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2297 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 2298 } 2299 mutex_unlock(&local->chanctx_mtx); 2300 } 2301 2302 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2303 { 2304 struct ieee80211_local *local = sdata->local; 2305 struct sta_info *sta; 2306 2307 /* add STAs back */ 2308 mutex_lock(&local->sta_mtx); 2309 list_for_each_entry(sta, &local->sta_list, list) { 2310 enum ieee80211_sta_state state; 2311 2312 if (!sta->uploaded || sta->sdata != sdata) 2313 continue; 2314 2315 for (state = IEEE80211_STA_NOTEXIST; 2316 state < sta->sta_state; state++) 2317 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2318 state + 1)); 2319 } 2320 mutex_unlock(&local->sta_mtx); 2321 } 2322 2323 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2324 { 2325 struct cfg80211_nan_func *func, **funcs; 2326 int res, id, i = 0; 2327 2328 res = drv_start_nan(sdata->local, sdata, 2329 &sdata->u.nan.conf); 2330 if (WARN_ON(res)) 2331 return res; 2332 2333 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2334 sizeof(*funcs), 2335 GFP_KERNEL); 2336 if (!funcs) 2337 return -ENOMEM; 2338 2339 /* Add all the functions: 2340 * This is a little bit ugly. We need to call a potentially sleeping 2341 * callback for each NAN function, so we can't hold the spinlock. 2342 */ 2343 spin_lock_bh(&sdata->u.nan.func_lock); 2344 2345 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2346 funcs[i++] = func; 2347 2348 spin_unlock_bh(&sdata->u.nan.func_lock); 2349 2350 for (i = 0; funcs[i]; i++) { 2351 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2352 if (WARN_ON(res)) 2353 ieee80211_nan_func_terminated(&sdata->vif, 2354 funcs[i]->instance_id, 2355 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2356 GFP_KERNEL); 2357 } 2358 2359 kfree(funcs); 2360 2361 return 0; 2362 } 2363 2364 int ieee80211_reconfig(struct ieee80211_local *local) 2365 { 2366 struct ieee80211_hw *hw = &local->hw; 2367 struct ieee80211_sub_if_data *sdata; 2368 struct ieee80211_chanctx *ctx; 2369 struct sta_info *sta; 2370 int res, i; 2371 bool reconfig_due_to_wowlan = false; 2372 struct ieee80211_sub_if_data *sched_scan_sdata; 2373 struct cfg80211_sched_scan_request *sched_scan_req; 2374 bool sched_scan_stopped = false; 2375 bool suspended = local->suspended; 2376 bool in_reconfig = false; 2377 2378 /* nothing to do if HW shouldn't run */ 2379 if (!local->open_count) 2380 goto wake_up; 2381 2382 #ifdef CONFIG_PM 2383 if (suspended) 2384 local->resuming = true; 2385 2386 if (local->wowlan) { 2387 /* 2388 * In the wowlan case, both mac80211 and the device 2389 * are functional when the resume op is called, so 2390 * clear local->suspended so the device could operate 2391 * normally (e.g. pass rx frames). 2392 */ 2393 local->suspended = false; 2394 res = drv_resume(local); 2395 local->wowlan = false; 2396 if (res < 0) { 2397 local->resuming = false; 2398 return res; 2399 } 2400 if (res == 0) 2401 goto wake_up; 2402 WARN_ON(res > 1); 2403 /* 2404 * res is 1, which means the driver requested 2405 * to go through a regular reset on wakeup. 2406 * restore local->suspended in this case. 2407 */ 2408 reconfig_due_to_wowlan = true; 2409 local->suspended = true; 2410 } 2411 #endif 2412 2413 /* 2414 * In case of hw_restart during suspend (without wowlan), 2415 * cancel restart work, as we are reconfiguring the device 2416 * anyway. 2417 * Note that restart_work is scheduled on a frozen workqueue, 2418 * so we can't deadlock in this case. 2419 */ 2420 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2421 cancel_work_sync(&local->restart_work); 2422 2423 local->started = false; 2424 2425 /* 2426 * Upon resume hardware can sometimes be goofy due to 2427 * various platform / driver / bus issues, so restarting 2428 * the device may at times not work immediately. Propagate 2429 * the error. 2430 */ 2431 res = drv_start(local); 2432 if (res) { 2433 if (suspended) 2434 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2435 else 2436 WARN(1, "Hardware became unavailable during restart.\n"); 2437 ieee80211_handle_reconfig_failure(local); 2438 return res; 2439 } 2440 2441 /* setup fragmentation threshold */ 2442 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2443 2444 /* setup RTS threshold */ 2445 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2446 2447 /* reset coverage class */ 2448 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2449 2450 ieee80211_led_radio(local, true); 2451 ieee80211_mod_tpt_led_trig(local, 2452 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2453 2454 /* add interfaces */ 2455 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2456 if (sdata) { 2457 /* in HW restart it exists already */ 2458 WARN_ON(local->resuming); 2459 res = drv_add_interface(local, sdata); 2460 if (WARN_ON(res)) { 2461 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2462 synchronize_net(); 2463 kfree(sdata); 2464 } 2465 } 2466 2467 list_for_each_entry(sdata, &local->interfaces, list) { 2468 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2469 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2470 ieee80211_sdata_running(sdata)) { 2471 res = drv_add_interface(local, sdata); 2472 if (WARN_ON(res)) 2473 break; 2474 } 2475 } 2476 2477 /* If adding any of the interfaces failed above, roll back and 2478 * report failure. 2479 */ 2480 if (res) { 2481 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2482 list) 2483 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2484 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2485 ieee80211_sdata_running(sdata)) 2486 drv_remove_interface(local, sdata); 2487 ieee80211_handle_reconfig_failure(local); 2488 return res; 2489 } 2490 2491 /* add channel contexts */ 2492 if (local->use_chanctx) { 2493 mutex_lock(&local->chanctx_mtx); 2494 list_for_each_entry(ctx, &local->chanctx_list, list) 2495 if (ctx->replace_state != 2496 IEEE80211_CHANCTX_REPLACES_OTHER) 2497 WARN_ON(drv_add_chanctx(local, ctx)); 2498 mutex_unlock(&local->chanctx_mtx); 2499 2500 sdata = wiphy_dereference(local->hw.wiphy, 2501 local->monitor_sdata); 2502 if (sdata && ieee80211_sdata_running(sdata)) 2503 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2504 } 2505 2506 /* reconfigure hardware */ 2507 ieee80211_hw_config(local, ~0); 2508 2509 ieee80211_configure_filter(local); 2510 2511 /* Finally also reconfigure all the BSS information */ 2512 list_for_each_entry(sdata, &local->interfaces, list) { 2513 unsigned int link_id; 2514 u32 changed; 2515 2516 if (!ieee80211_sdata_running(sdata)) 2517 continue; 2518 2519 sdata_lock(sdata); 2520 for (link_id = 0; 2521 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2522 link_id++) { 2523 struct ieee80211_link_data *link; 2524 2525 link = sdata_dereference(sdata->link[link_id], sdata); 2526 if (link) 2527 ieee80211_assign_chanctx(local, sdata, link); 2528 } 2529 sdata_unlock(sdata); 2530 2531 switch (sdata->vif.type) { 2532 case NL80211_IFTYPE_AP_VLAN: 2533 case NL80211_IFTYPE_MONITOR: 2534 break; 2535 case NL80211_IFTYPE_ADHOC: 2536 if (sdata->vif.cfg.ibss_joined) 2537 WARN_ON(drv_join_ibss(local, sdata)); 2538 fallthrough; 2539 default: 2540 ieee80211_reconfig_stations(sdata); 2541 fallthrough; 2542 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2543 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2544 drv_conf_tx(local, &sdata->deflink, i, 2545 &sdata->deflink.tx_conf[i]); 2546 break; 2547 } 2548 2549 /* common change flags for all interface types */ 2550 changed = BSS_CHANGED_ERP_CTS_PROT | 2551 BSS_CHANGED_ERP_PREAMBLE | 2552 BSS_CHANGED_ERP_SLOT | 2553 BSS_CHANGED_HT | 2554 BSS_CHANGED_BASIC_RATES | 2555 BSS_CHANGED_BEACON_INT | 2556 BSS_CHANGED_BSSID | 2557 BSS_CHANGED_CQM | 2558 BSS_CHANGED_QOS | 2559 BSS_CHANGED_IDLE | 2560 BSS_CHANGED_TXPOWER | 2561 BSS_CHANGED_MCAST_RATE; 2562 2563 if (sdata->vif.bss_conf.mu_mimo_owner) 2564 changed |= BSS_CHANGED_MU_GROUPS; 2565 2566 switch (sdata->vif.type) { 2567 case NL80211_IFTYPE_STATION: 2568 changed |= BSS_CHANGED_ASSOC | 2569 BSS_CHANGED_ARP_FILTER | 2570 BSS_CHANGED_PS; 2571 2572 /* Re-send beacon info report to the driver */ 2573 if (sdata->deflink.u.mgd.have_beacon) 2574 changed |= BSS_CHANGED_BEACON_INFO; 2575 2576 if (sdata->vif.bss_conf.max_idle_period || 2577 sdata->vif.bss_conf.protected_keep_alive) 2578 changed |= BSS_CHANGED_KEEP_ALIVE; 2579 2580 sdata_lock(sdata); 2581 ieee80211_bss_info_change_notify(sdata, changed); 2582 sdata_unlock(sdata); 2583 break; 2584 case NL80211_IFTYPE_OCB: 2585 changed |= BSS_CHANGED_OCB; 2586 ieee80211_bss_info_change_notify(sdata, changed); 2587 break; 2588 case NL80211_IFTYPE_ADHOC: 2589 changed |= BSS_CHANGED_IBSS; 2590 fallthrough; 2591 case NL80211_IFTYPE_AP: 2592 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2593 2594 if (sdata->vif.bss_conf.ftm_responder == 1 && 2595 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2596 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2597 changed |= BSS_CHANGED_FTM_RESPONDER; 2598 2599 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2600 changed |= BSS_CHANGED_AP_PROBE_RESP; 2601 2602 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2603 drv_start_ap(local, sdata, 2604 sdata->deflink.conf); 2605 } 2606 fallthrough; 2607 case NL80211_IFTYPE_MESH_POINT: 2608 if (sdata->vif.bss_conf.enable_beacon) { 2609 changed |= BSS_CHANGED_BEACON | 2610 BSS_CHANGED_BEACON_ENABLED; 2611 ieee80211_bss_info_change_notify(sdata, changed); 2612 } 2613 break; 2614 case NL80211_IFTYPE_NAN: 2615 res = ieee80211_reconfig_nan(sdata); 2616 if (res < 0) { 2617 ieee80211_handle_reconfig_failure(local); 2618 return res; 2619 } 2620 break; 2621 case NL80211_IFTYPE_AP_VLAN: 2622 case NL80211_IFTYPE_MONITOR: 2623 case NL80211_IFTYPE_P2P_DEVICE: 2624 /* nothing to do */ 2625 break; 2626 case NL80211_IFTYPE_UNSPECIFIED: 2627 case NUM_NL80211_IFTYPES: 2628 case NL80211_IFTYPE_P2P_CLIENT: 2629 case NL80211_IFTYPE_P2P_GO: 2630 case NL80211_IFTYPE_WDS: 2631 WARN_ON(1); 2632 break; 2633 } 2634 } 2635 2636 ieee80211_recalc_ps(local); 2637 2638 /* 2639 * The sta might be in psm against the ap (e.g. because 2640 * this was the state before a hw restart), so we 2641 * explicitly send a null packet in order to make sure 2642 * it'll sync against the ap (and get out of psm). 2643 */ 2644 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2645 list_for_each_entry(sdata, &local->interfaces, list) { 2646 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2647 continue; 2648 if (!sdata->u.mgd.associated) 2649 continue; 2650 2651 ieee80211_send_nullfunc(local, sdata, false); 2652 } 2653 } 2654 2655 /* APs are now beaconing, add back stations */ 2656 mutex_lock(&local->sta_mtx); 2657 list_for_each_entry(sta, &local->sta_list, list) { 2658 enum ieee80211_sta_state state; 2659 2660 if (!sta->uploaded) 2661 continue; 2662 2663 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2664 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2665 continue; 2666 2667 for (state = IEEE80211_STA_NOTEXIST; 2668 state < sta->sta_state; state++) 2669 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2670 state + 1)); 2671 } 2672 mutex_unlock(&local->sta_mtx); 2673 2674 /* add back keys */ 2675 list_for_each_entry(sdata, &local->interfaces, list) 2676 ieee80211_reenable_keys(sdata); 2677 2678 /* Reconfigure sched scan if it was interrupted by FW restart */ 2679 mutex_lock(&local->mtx); 2680 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2681 lockdep_is_held(&local->mtx)); 2682 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2683 lockdep_is_held(&local->mtx)); 2684 if (sched_scan_sdata && sched_scan_req) 2685 /* 2686 * Sched scan stopped, but we don't want to report it. Instead, 2687 * we're trying to reschedule. However, if more than one scan 2688 * plan was set, we cannot reschedule since we don't know which 2689 * scan plan was currently running (and some scan plans may have 2690 * already finished). 2691 */ 2692 if (sched_scan_req->n_scan_plans > 1 || 2693 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2694 sched_scan_req)) { 2695 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2696 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2697 sched_scan_stopped = true; 2698 } 2699 mutex_unlock(&local->mtx); 2700 2701 if (sched_scan_stopped) 2702 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2703 2704 wake_up: 2705 2706 if (local->monitors == local->open_count && local->monitors > 0) 2707 ieee80211_add_virtual_monitor(local); 2708 2709 /* 2710 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2711 * sessions can be established after a resume. 2712 * 2713 * Also tear down aggregation sessions since reconfiguring 2714 * them in a hardware restart scenario is not easily done 2715 * right now, and the hardware will have lost information 2716 * about the sessions, but we and the AP still think they 2717 * are active. This is really a workaround though. 2718 */ 2719 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2720 mutex_lock(&local->sta_mtx); 2721 2722 list_for_each_entry(sta, &local->sta_list, list) { 2723 if (!local->resuming) 2724 ieee80211_sta_tear_down_BA_sessions( 2725 sta, AGG_STOP_LOCAL_REQUEST); 2726 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2727 } 2728 2729 mutex_unlock(&local->sta_mtx); 2730 } 2731 2732 /* 2733 * If this is for hw restart things are still running. 2734 * We may want to change that later, however. 2735 */ 2736 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2737 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2738 2739 if (local->in_reconfig) { 2740 in_reconfig = local->in_reconfig; 2741 local->in_reconfig = false; 2742 barrier(); 2743 2744 /* Restart deferred ROCs */ 2745 mutex_lock(&local->mtx); 2746 ieee80211_start_next_roc(local); 2747 mutex_unlock(&local->mtx); 2748 2749 /* Requeue all works */ 2750 list_for_each_entry(sdata, &local->interfaces, list) 2751 ieee80211_queue_work(&local->hw, &sdata->work); 2752 } 2753 2754 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2755 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2756 false); 2757 2758 if (in_reconfig) { 2759 list_for_each_entry(sdata, &local->interfaces, list) { 2760 if (!ieee80211_sdata_running(sdata)) 2761 continue; 2762 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2763 ieee80211_sta_restart(sdata); 2764 } 2765 } 2766 2767 if (!suspended) 2768 return 0; 2769 2770 #ifdef CONFIG_PM 2771 /* first set suspended false, then resuming */ 2772 local->suspended = false; 2773 mb(); 2774 local->resuming = false; 2775 2776 ieee80211_flush_completed_scan(local, false); 2777 2778 if (local->open_count && !reconfig_due_to_wowlan) 2779 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2780 2781 list_for_each_entry(sdata, &local->interfaces, list) { 2782 if (!ieee80211_sdata_running(sdata)) 2783 continue; 2784 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2785 ieee80211_sta_restart(sdata); 2786 } 2787 2788 mod_timer(&local->sta_cleanup, jiffies + 1); 2789 #else 2790 WARN_ON(1); 2791 #endif 2792 2793 return 0; 2794 } 2795 2796 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2797 { 2798 struct ieee80211_sub_if_data *sdata; 2799 struct ieee80211_local *local; 2800 struct ieee80211_key *key; 2801 2802 if (WARN_ON(!vif)) 2803 return; 2804 2805 sdata = vif_to_sdata(vif); 2806 local = sdata->local; 2807 2808 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2809 !local->resuming)) 2810 return; 2811 2812 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2813 !local->in_reconfig)) 2814 return; 2815 2816 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2817 return; 2818 2819 sdata->flags |= flag; 2820 2821 mutex_lock(&local->key_mtx); 2822 list_for_each_entry(key, &sdata->key_list, list) 2823 key->flags |= KEY_FLAG_TAINTED; 2824 mutex_unlock(&local->key_mtx); 2825 } 2826 2827 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2828 { 2829 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2830 } 2831 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2832 2833 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2834 { 2835 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2836 } 2837 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2838 2839 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2840 struct ieee80211_link_data *link) 2841 { 2842 struct ieee80211_local *local = sdata->local; 2843 struct ieee80211_chanctx_conf *chanctx_conf; 2844 struct ieee80211_chanctx *chanctx; 2845 2846 mutex_lock(&local->chanctx_mtx); 2847 2848 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2849 lockdep_is_held(&local->chanctx_mtx)); 2850 2851 /* 2852 * This function can be called from a work, thus it may be possible 2853 * that the chanctx_conf is removed (due to a disconnection, for 2854 * example). 2855 * So nothing should be done in such case. 2856 */ 2857 if (!chanctx_conf) 2858 goto unlock; 2859 2860 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2861 ieee80211_recalc_smps_chanctx(local, chanctx); 2862 unlock: 2863 mutex_unlock(&local->chanctx_mtx); 2864 } 2865 2866 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2867 int link_id) 2868 { 2869 struct ieee80211_local *local = sdata->local; 2870 struct ieee80211_chanctx_conf *chanctx_conf; 2871 struct ieee80211_chanctx *chanctx; 2872 int i; 2873 2874 mutex_lock(&local->chanctx_mtx); 2875 2876 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2877 struct ieee80211_bss_conf *bss_conf; 2878 2879 if (link_id >= 0 && link_id != i) 2880 continue; 2881 2882 rcu_read_lock(); 2883 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2884 if (!bss_conf) { 2885 rcu_read_unlock(); 2886 continue; 2887 } 2888 2889 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2890 lockdep_is_held(&local->chanctx_mtx)); 2891 /* 2892 * Since we hold the chanctx_mtx (checked above) 2893 * we can take the chanctx_conf pointer out of the 2894 * RCU critical section, it cannot go away without 2895 * the mutex. Just the way we reached it could - in 2896 * theory - go away, but we don't really care and 2897 * it really shouldn't happen anyway. 2898 */ 2899 rcu_read_unlock(); 2900 2901 if (WARN_ON_ONCE(!chanctx_conf)) 2902 goto unlock; 2903 2904 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2905 conf); 2906 ieee80211_recalc_chanctx_min_def(local, chanctx); 2907 } 2908 unlock: 2909 mutex_unlock(&local->chanctx_mtx); 2910 } 2911 2912 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2913 { 2914 size_t pos = offset; 2915 2916 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2917 pos += 2 + ies[pos + 1]; 2918 2919 return pos; 2920 } 2921 2922 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2923 u16 cap) 2924 { 2925 __le16 tmp; 2926 2927 *pos++ = WLAN_EID_HT_CAPABILITY; 2928 *pos++ = sizeof(struct ieee80211_ht_cap); 2929 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2930 2931 /* capability flags */ 2932 tmp = cpu_to_le16(cap); 2933 memcpy(pos, &tmp, sizeof(u16)); 2934 pos += sizeof(u16); 2935 2936 /* AMPDU parameters */ 2937 *pos++ = ht_cap->ampdu_factor | 2938 (ht_cap->ampdu_density << 2939 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2940 2941 /* MCS set */ 2942 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2943 pos += sizeof(ht_cap->mcs); 2944 2945 /* extended capabilities */ 2946 pos += sizeof(__le16); 2947 2948 /* BF capabilities */ 2949 pos += sizeof(__le32); 2950 2951 /* antenna selection */ 2952 pos += sizeof(u8); 2953 2954 return pos; 2955 } 2956 2957 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2958 u32 cap) 2959 { 2960 __le32 tmp; 2961 2962 *pos++ = WLAN_EID_VHT_CAPABILITY; 2963 *pos++ = sizeof(struct ieee80211_vht_cap); 2964 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2965 2966 /* capability flags */ 2967 tmp = cpu_to_le32(cap); 2968 memcpy(pos, &tmp, sizeof(u32)); 2969 pos += sizeof(u32); 2970 2971 /* VHT MCS set */ 2972 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2973 pos += sizeof(vht_cap->vht_mcs); 2974 2975 return pos; 2976 } 2977 2978 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2979 { 2980 const struct ieee80211_sta_he_cap *he_cap; 2981 struct ieee80211_supported_band *sband; 2982 u8 n; 2983 2984 sband = ieee80211_get_sband(sdata); 2985 if (!sband) 2986 return 0; 2987 2988 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2989 if (!he_cap) 2990 return 0; 2991 2992 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2993 return 2 + 1 + 2994 sizeof(he_cap->he_cap_elem) + n + 2995 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2996 he_cap->he_cap_elem.phy_cap_info); 2997 } 2998 2999 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos, 3000 const struct ieee80211_sta_he_cap *he_cap, 3001 u8 *end) 3002 { 3003 struct ieee80211_he_cap_elem elem; 3004 u8 n; 3005 u8 ie_len; 3006 u8 *orig_pos = pos; 3007 3008 /* Make sure we have place for the IE */ 3009 /* 3010 * TODO: the 1 added is because this temporarily is under the EXTENSION 3011 * IE. Get rid of it when it moves. 3012 */ 3013 if (!he_cap) 3014 return orig_pos; 3015 3016 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 3017 elem = he_cap->he_cap_elem; 3018 3019 if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ) 3020 elem.phy_cap_info[0] &= 3021 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 3022 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 3023 3024 if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ) 3025 elem.phy_cap_info[0] &= 3026 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3027 3028 if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ) 3029 elem.phy_cap_info[0] &= 3030 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3031 3032 n = ieee80211_he_mcs_nss_size(&elem); 3033 ie_len = 2 + 1 + 3034 sizeof(he_cap->he_cap_elem) + n + 3035 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3036 he_cap->he_cap_elem.phy_cap_info); 3037 3038 if ((end - pos) < ie_len) 3039 return orig_pos; 3040 3041 *pos++ = WLAN_EID_EXTENSION; 3042 pos++; /* We'll set the size later below */ 3043 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 3044 3045 /* Fixed data */ 3046 memcpy(pos, &elem, sizeof(elem)); 3047 pos += sizeof(elem); 3048 3049 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 3050 pos += n; 3051 3052 /* Check if PPE Threshold should be present */ 3053 if ((he_cap->he_cap_elem.phy_cap_info[6] & 3054 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 3055 goto end; 3056 3057 /* 3058 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 3059 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 3060 */ 3061 n = hweight8(he_cap->ppe_thres[0] & 3062 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 3063 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 3064 IEEE80211_PPE_THRES_NSS_POS)); 3065 3066 /* 3067 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 3068 * total size. 3069 */ 3070 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 3071 n = DIV_ROUND_UP(n, 8); 3072 3073 /* Copy PPE Thresholds */ 3074 memcpy(pos, &he_cap->ppe_thres, n); 3075 pos += n; 3076 3077 end: 3078 orig_pos[1] = (pos - orig_pos) - 2; 3079 return pos; 3080 } 3081 3082 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata, 3083 struct sk_buff *skb) 3084 { 3085 struct ieee80211_supported_band *sband; 3086 const struct ieee80211_sband_iftype_data *iftd; 3087 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3088 u8 *pos; 3089 u16 cap; 3090 3091 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 3092 BIT(NL80211_BAND_6GHZ), 3093 IEEE80211_CHAN_NO_HE)) 3094 return; 3095 3096 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3097 3098 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 3099 if (!iftd) 3100 return; 3101 3102 /* Check for device HE 6 GHz capability before adding element */ 3103 if (!iftd->he_6ghz_capa.capa) 3104 return; 3105 3106 cap = le16_to_cpu(iftd->he_6ghz_capa.capa); 3107 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS; 3108 3109 switch (sdata->deflink.smps_mode) { 3110 case IEEE80211_SMPS_AUTOMATIC: 3111 case IEEE80211_SMPS_NUM_MODES: 3112 WARN_ON(1); 3113 fallthrough; 3114 case IEEE80211_SMPS_OFF: 3115 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 3116 IEEE80211_HE_6GHZ_CAP_SM_PS); 3117 break; 3118 case IEEE80211_SMPS_STATIC: 3119 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 3120 IEEE80211_HE_6GHZ_CAP_SM_PS); 3121 break; 3122 case IEEE80211_SMPS_DYNAMIC: 3123 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 3124 IEEE80211_HE_6GHZ_CAP_SM_PS); 3125 break; 3126 } 3127 3128 pos = skb_put(skb, 2 + 1 + sizeof(cap)); 3129 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap), 3130 pos + 2 + 1 + sizeof(cap)); 3131 } 3132 3133 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3134 const struct cfg80211_chan_def *chandef, 3135 u16 prot_mode, bool rifs_mode) 3136 { 3137 struct ieee80211_ht_operation *ht_oper; 3138 /* Build HT Information */ 3139 *pos++ = WLAN_EID_HT_OPERATION; 3140 *pos++ = sizeof(struct ieee80211_ht_operation); 3141 ht_oper = (struct ieee80211_ht_operation *)pos; 3142 ht_oper->primary_chan = ieee80211_frequency_to_channel( 3143 chandef->chan->center_freq); 3144 switch (chandef->width) { 3145 case NL80211_CHAN_WIDTH_160: 3146 case NL80211_CHAN_WIDTH_80P80: 3147 case NL80211_CHAN_WIDTH_80: 3148 case NL80211_CHAN_WIDTH_40: 3149 if (chandef->center_freq1 > chandef->chan->center_freq) 3150 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3151 else 3152 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3153 break; 3154 case NL80211_CHAN_WIDTH_320: 3155 /* HT information element should not be included on 6GHz */ 3156 WARN_ON(1); 3157 return pos; 3158 default: 3159 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 3160 break; 3161 } 3162 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 3163 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 3164 chandef->width != NL80211_CHAN_WIDTH_20) 3165 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 3166 3167 if (rifs_mode) 3168 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 3169 3170 ht_oper->operation_mode = cpu_to_le16(prot_mode); 3171 ht_oper->stbc_param = 0x0000; 3172 3173 /* It seems that Basic MCS set and Supported MCS set 3174 are identical for the first 10 bytes */ 3175 memset(&ht_oper->basic_set, 0, 16); 3176 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 3177 3178 return pos + sizeof(struct ieee80211_ht_operation); 3179 } 3180 3181 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 3182 const struct cfg80211_chan_def *chandef) 3183 { 3184 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 3185 *pos++ = 3; /* IE length */ 3186 /* New channel width */ 3187 switch (chandef->width) { 3188 case NL80211_CHAN_WIDTH_80: 3189 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 3190 break; 3191 case NL80211_CHAN_WIDTH_160: 3192 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 3193 break; 3194 case NL80211_CHAN_WIDTH_80P80: 3195 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 3196 break; 3197 case NL80211_CHAN_WIDTH_320: 3198 /* The behavior is not defined for 320 MHz channels */ 3199 WARN_ON(1); 3200 fallthrough; 3201 default: 3202 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 3203 } 3204 3205 /* new center frequency segment 0 */ 3206 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 3207 /* new center frequency segment 1 */ 3208 if (chandef->center_freq2) 3209 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 3210 else 3211 *pos++ = 0; 3212 } 3213 3214 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3215 const struct cfg80211_chan_def *chandef) 3216 { 3217 struct ieee80211_vht_operation *vht_oper; 3218 3219 *pos++ = WLAN_EID_VHT_OPERATION; 3220 *pos++ = sizeof(struct ieee80211_vht_operation); 3221 vht_oper = (struct ieee80211_vht_operation *)pos; 3222 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 3223 chandef->center_freq1); 3224 if (chandef->center_freq2) 3225 vht_oper->center_freq_seg1_idx = 3226 ieee80211_frequency_to_channel(chandef->center_freq2); 3227 else 3228 vht_oper->center_freq_seg1_idx = 0x00; 3229 3230 switch (chandef->width) { 3231 case NL80211_CHAN_WIDTH_160: 3232 /* 3233 * Convert 160 MHz channel width to new style as interop 3234 * workaround. 3235 */ 3236 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3237 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 3238 if (chandef->chan->center_freq < chandef->center_freq1) 3239 vht_oper->center_freq_seg0_idx -= 8; 3240 else 3241 vht_oper->center_freq_seg0_idx += 8; 3242 break; 3243 case NL80211_CHAN_WIDTH_80P80: 3244 /* 3245 * Convert 80+80 MHz channel width to new style as interop 3246 * workaround. 3247 */ 3248 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3249 break; 3250 case NL80211_CHAN_WIDTH_80: 3251 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3252 break; 3253 case NL80211_CHAN_WIDTH_320: 3254 /* VHT information element should not be included on 6GHz */ 3255 WARN_ON(1); 3256 return pos; 3257 default: 3258 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 3259 break; 3260 } 3261 3262 /* don't require special VHT peer rates */ 3263 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 3264 3265 return pos + sizeof(struct ieee80211_vht_operation); 3266 } 3267 3268 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef) 3269 { 3270 struct ieee80211_he_operation *he_oper; 3271 struct ieee80211_he_6ghz_oper *he_6ghz_op; 3272 u32 he_oper_params; 3273 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 3274 3275 if (chandef->chan->band == NL80211_BAND_6GHZ) 3276 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 3277 3278 *pos++ = WLAN_EID_EXTENSION; 3279 *pos++ = ie_len; 3280 *pos++ = WLAN_EID_EXT_HE_OPERATION; 3281 3282 he_oper_params = 0; 3283 he_oper_params |= u32_encode_bits(1023, /* disabled */ 3284 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3285 he_oper_params |= u32_encode_bits(1, 3286 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 3287 he_oper_params |= u32_encode_bits(1, 3288 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3289 if (chandef->chan->band == NL80211_BAND_6GHZ) 3290 he_oper_params |= u32_encode_bits(1, 3291 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 3292 3293 he_oper = (struct ieee80211_he_operation *)pos; 3294 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 3295 3296 /* don't require special HE peer rates */ 3297 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 3298 pos += sizeof(struct ieee80211_he_operation); 3299 3300 if (chandef->chan->band != NL80211_BAND_6GHZ) 3301 goto out; 3302 3303 /* TODO add VHT operational */ 3304 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3305 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3306 he_6ghz_op->primary = 3307 ieee80211_frequency_to_channel(chandef->chan->center_freq); 3308 he_6ghz_op->ccfs0 = 3309 ieee80211_frequency_to_channel(chandef->center_freq1); 3310 if (chandef->center_freq2) 3311 he_6ghz_op->ccfs1 = 3312 ieee80211_frequency_to_channel(chandef->center_freq2); 3313 else 3314 he_6ghz_op->ccfs1 = 0; 3315 3316 switch (chandef->width) { 3317 case NL80211_CHAN_WIDTH_320: 3318 /* 3319 * TODO: mesh operation is not defined over 6GHz 320 MHz 3320 * channels. 3321 */ 3322 WARN_ON(1); 3323 break; 3324 case NL80211_CHAN_WIDTH_160: 3325 /* Convert 160 MHz channel width to new style as interop 3326 * workaround. 3327 */ 3328 he_6ghz_op->control = 3329 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3330 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3331 if (chandef->chan->center_freq < chandef->center_freq1) 3332 he_6ghz_op->ccfs0 -= 8; 3333 else 3334 he_6ghz_op->ccfs0 += 8; 3335 fallthrough; 3336 case NL80211_CHAN_WIDTH_80P80: 3337 he_6ghz_op->control = 3338 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3339 break; 3340 case NL80211_CHAN_WIDTH_80: 3341 he_6ghz_op->control = 3342 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3343 break; 3344 case NL80211_CHAN_WIDTH_40: 3345 he_6ghz_op->control = 3346 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3347 break; 3348 default: 3349 he_6ghz_op->control = 3350 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3351 break; 3352 } 3353 3354 pos += sizeof(struct ieee80211_he_6ghz_oper); 3355 3356 out: 3357 return pos; 3358 } 3359 3360 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3361 struct cfg80211_chan_def *chandef) 3362 { 3363 enum nl80211_channel_type channel_type; 3364 3365 if (!ht_oper) 3366 return false; 3367 3368 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3369 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3370 channel_type = NL80211_CHAN_HT20; 3371 break; 3372 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3373 channel_type = NL80211_CHAN_HT40PLUS; 3374 break; 3375 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3376 channel_type = NL80211_CHAN_HT40MINUS; 3377 break; 3378 default: 3379 return false; 3380 } 3381 3382 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3383 return true; 3384 } 3385 3386 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3387 const struct ieee80211_vht_operation *oper, 3388 const struct ieee80211_ht_operation *htop, 3389 struct cfg80211_chan_def *chandef) 3390 { 3391 struct cfg80211_chan_def new = *chandef; 3392 int cf0, cf1; 3393 int ccfs0, ccfs1, ccfs2; 3394 int ccf0, ccf1; 3395 u32 vht_cap; 3396 bool support_80_80 = false; 3397 bool support_160 = false; 3398 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3399 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3400 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3401 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3402 3403 if (!oper || !htop) 3404 return false; 3405 3406 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3407 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3408 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3409 support_80_80 = ((vht_cap & 3410 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3411 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3412 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3413 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3414 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3415 ccfs0 = oper->center_freq_seg0_idx; 3416 ccfs1 = oper->center_freq_seg1_idx; 3417 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3418 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3419 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3420 3421 ccf0 = ccfs0; 3422 3423 /* if not supported, parse as though we didn't understand it */ 3424 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3425 ext_nss_bw_supp = 0; 3426 3427 /* 3428 * Cf. IEEE 802.11 Table 9-250 3429 * 3430 * We really just consider that because it's inefficient to connect 3431 * at a higher bandwidth than we'll actually be able to use. 3432 */ 3433 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3434 default: 3435 case 0x00: 3436 ccf1 = 0; 3437 support_160 = false; 3438 support_80_80 = false; 3439 break; 3440 case 0x01: 3441 support_80_80 = false; 3442 fallthrough; 3443 case 0x02: 3444 case 0x03: 3445 ccf1 = ccfs2; 3446 break; 3447 case 0x10: 3448 ccf1 = ccfs1; 3449 break; 3450 case 0x11: 3451 case 0x12: 3452 if (!ccfs1) 3453 ccf1 = ccfs2; 3454 else 3455 ccf1 = ccfs1; 3456 break; 3457 case 0x13: 3458 case 0x20: 3459 case 0x23: 3460 ccf1 = ccfs1; 3461 break; 3462 } 3463 3464 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3465 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3466 3467 switch (oper->chan_width) { 3468 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3469 /* just use HT information directly */ 3470 break; 3471 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3472 new.width = NL80211_CHAN_WIDTH_80; 3473 new.center_freq1 = cf0; 3474 /* If needed, adjust based on the newer interop workaround. */ 3475 if (ccf1) { 3476 unsigned int diff; 3477 3478 diff = abs(ccf1 - ccf0); 3479 if ((diff == 8) && support_160) { 3480 new.width = NL80211_CHAN_WIDTH_160; 3481 new.center_freq1 = cf1; 3482 } else if ((diff > 8) && support_80_80) { 3483 new.width = NL80211_CHAN_WIDTH_80P80; 3484 new.center_freq2 = cf1; 3485 } 3486 } 3487 break; 3488 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3489 /* deprecated encoding */ 3490 new.width = NL80211_CHAN_WIDTH_160; 3491 new.center_freq1 = cf0; 3492 break; 3493 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3494 /* deprecated encoding */ 3495 new.width = NL80211_CHAN_WIDTH_80P80; 3496 new.center_freq1 = cf0; 3497 new.center_freq2 = cf1; 3498 break; 3499 default: 3500 return false; 3501 } 3502 3503 if (!cfg80211_chandef_valid(&new)) 3504 return false; 3505 3506 *chandef = new; 3507 return true; 3508 } 3509 3510 void ieee80211_chandef_eht_oper(struct ieee80211_sub_if_data *sdata, 3511 const struct ieee80211_eht_operation *eht_oper, 3512 bool support_160, bool support_320, 3513 struct cfg80211_chan_def *chandef) 3514 { 3515 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 3516 3517 chandef->center_freq1 = 3518 ieee80211_channel_to_frequency(info->ccfs0, 3519 chandef->chan->band); 3520 3521 switch (u8_get_bits(info->control, 3522 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3523 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3524 chandef->width = NL80211_CHAN_WIDTH_20; 3525 break; 3526 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3527 chandef->width = NL80211_CHAN_WIDTH_40; 3528 break; 3529 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3530 chandef->width = NL80211_CHAN_WIDTH_80; 3531 break; 3532 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3533 if (support_160) { 3534 chandef->width = NL80211_CHAN_WIDTH_160; 3535 chandef->center_freq1 = 3536 ieee80211_channel_to_frequency(info->ccfs1, 3537 chandef->chan->band); 3538 } else { 3539 chandef->width = NL80211_CHAN_WIDTH_80; 3540 } 3541 break; 3542 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3543 if (support_320) { 3544 chandef->width = NL80211_CHAN_WIDTH_320; 3545 chandef->center_freq1 = 3546 ieee80211_channel_to_frequency(info->ccfs1, 3547 chandef->chan->band); 3548 } else if (support_160) { 3549 chandef->width = NL80211_CHAN_WIDTH_160; 3550 } else { 3551 chandef->width = NL80211_CHAN_WIDTH_80; 3552 3553 if (chandef->center_freq1 > chandef->chan->center_freq) 3554 chandef->center_freq1 -= 40; 3555 else 3556 chandef->center_freq1 += 40; 3557 } 3558 break; 3559 } 3560 } 3561 3562 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata, 3563 const struct ieee80211_he_operation *he_oper, 3564 const struct ieee80211_eht_operation *eht_oper, 3565 struct cfg80211_chan_def *chandef) 3566 { 3567 struct ieee80211_local *local = sdata->local; 3568 struct ieee80211_supported_band *sband; 3569 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3570 const struct ieee80211_sta_he_cap *he_cap; 3571 const struct ieee80211_sta_eht_cap *eht_cap; 3572 struct cfg80211_chan_def he_chandef = *chandef; 3573 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3574 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3575 bool support_80_80, support_160, support_320; 3576 u8 he_phy_cap, eht_phy_cap; 3577 u32 freq; 3578 3579 if (chandef->chan->band != NL80211_BAND_6GHZ) 3580 return true; 3581 3582 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3583 3584 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3585 if (!he_cap) { 3586 sdata_info(sdata, "Missing iftype sband data/HE cap"); 3587 return false; 3588 } 3589 3590 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0]; 3591 support_160 = 3592 he_phy_cap & 3593 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3594 support_80_80 = 3595 he_phy_cap & 3596 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3597 3598 if (!he_oper) { 3599 sdata_info(sdata, 3600 "HE is not advertised on (on %d MHz), expect issues\n", 3601 chandef->chan->center_freq); 3602 return false; 3603 } 3604 3605 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 3606 if (!eht_cap) { 3607 sdata_info(sdata, "Missing iftype sband data/EHT cap"); 3608 eht_oper = NULL; 3609 } 3610 3611 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3612 3613 if (!he_6ghz_oper) { 3614 sdata_info(sdata, 3615 "HE 6GHz operation missing (on %d MHz), expect issues\n", 3616 chandef->chan->center_freq); 3617 return false; 3618 } 3619 3620 /* 3621 * The EHT operation IE does not contain the primary channel so the 3622 * primary channel frequency should be taken from the 6 GHz operation 3623 * information. 3624 */ 3625 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3626 NL80211_BAND_6GHZ); 3627 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 3628 3629 switch (u8_get_bits(he_6ghz_oper->control, 3630 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 3631 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 3632 bss_conf->power_type = IEEE80211_REG_LPI_AP; 3633 break; 3634 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 3635 bss_conf->power_type = IEEE80211_REG_SP_AP; 3636 break; 3637 default: 3638 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 3639 break; 3640 } 3641 3642 if (!eht_oper || 3643 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3644 switch (u8_get_bits(he_6ghz_oper->control, 3645 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3646 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3647 he_chandef.width = NL80211_CHAN_WIDTH_20; 3648 break; 3649 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3650 he_chandef.width = NL80211_CHAN_WIDTH_40; 3651 break; 3652 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3653 he_chandef.width = NL80211_CHAN_WIDTH_80; 3654 break; 3655 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3656 he_chandef.width = NL80211_CHAN_WIDTH_80; 3657 if (!he_6ghz_oper->ccfs1) 3658 break; 3659 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) { 3660 if (support_160) 3661 he_chandef.width = NL80211_CHAN_WIDTH_160; 3662 } else { 3663 if (support_80_80) 3664 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3665 } 3666 break; 3667 } 3668 3669 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3670 he_chandef.center_freq1 = 3671 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3672 NL80211_BAND_6GHZ); 3673 } else { 3674 he_chandef.center_freq1 = 3675 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3676 NL80211_BAND_6GHZ); 3677 if (support_80_80 || support_160) 3678 he_chandef.center_freq2 = 3679 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3680 NL80211_BAND_6GHZ); 3681 } 3682 } else { 3683 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0]; 3684 support_320 = 3685 eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 3686 3687 ieee80211_chandef_eht_oper(sdata, eht_oper, support_160, 3688 support_320, &he_chandef); 3689 } 3690 3691 if (!cfg80211_chandef_valid(&he_chandef)) { 3692 sdata_info(sdata, 3693 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n", 3694 he_chandef.chan ? he_chandef.chan->center_freq : 0, 3695 he_chandef.width, 3696 he_chandef.center_freq1, 3697 he_chandef.center_freq2); 3698 return false; 3699 } 3700 3701 *chandef = he_chandef; 3702 3703 return true; 3704 } 3705 3706 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper, 3707 struct cfg80211_chan_def *chandef) 3708 { 3709 u32 oper_freq; 3710 3711 if (!oper) 3712 return false; 3713 3714 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3715 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3716 chandef->width = NL80211_CHAN_WIDTH_1; 3717 break; 3718 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3719 chandef->width = NL80211_CHAN_WIDTH_2; 3720 break; 3721 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3722 chandef->width = NL80211_CHAN_WIDTH_4; 3723 break; 3724 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3725 chandef->width = NL80211_CHAN_WIDTH_8; 3726 break; 3727 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3728 chandef->width = NL80211_CHAN_WIDTH_16; 3729 break; 3730 default: 3731 return false; 3732 } 3733 3734 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch, 3735 NL80211_BAND_S1GHZ); 3736 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq); 3737 chandef->freq1_offset = oper_freq % 1000; 3738 3739 return true; 3740 } 3741 3742 int ieee80211_parse_bitrates(enum nl80211_chan_width width, 3743 const struct ieee80211_supported_band *sband, 3744 const u8 *srates, int srates_len, u32 *rates) 3745 { 3746 u32 rate_flags = ieee80211_chanwidth_rate_flags(width); 3747 int shift = ieee80211_chanwidth_get_shift(width); 3748 struct ieee80211_rate *br; 3749 int brate, rate, i, j, count = 0; 3750 3751 *rates = 0; 3752 3753 for (i = 0; i < srates_len; i++) { 3754 rate = srates[i] & 0x7f; 3755 3756 for (j = 0; j < sband->n_bitrates; j++) { 3757 br = &sband->bitrates[j]; 3758 if ((rate_flags & br->flags) != rate_flags) 3759 continue; 3760 3761 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3762 if (brate == rate) { 3763 *rates |= BIT(j); 3764 count++; 3765 break; 3766 } 3767 } 3768 } 3769 return count; 3770 } 3771 3772 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3773 struct sk_buff *skb, bool need_basic, 3774 enum nl80211_band band) 3775 { 3776 struct ieee80211_local *local = sdata->local; 3777 struct ieee80211_supported_band *sband; 3778 int rate, shift; 3779 u8 i, rates, *pos; 3780 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3781 u32 rate_flags; 3782 3783 shift = ieee80211_vif_get_shift(&sdata->vif); 3784 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3785 sband = local->hw.wiphy->bands[band]; 3786 rates = 0; 3787 for (i = 0; i < sband->n_bitrates; i++) { 3788 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3789 continue; 3790 rates++; 3791 } 3792 if (rates > 8) 3793 rates = 8; 3794 3795 if (skb_tailroom(skb) < rates + 2) 3796 return -ENOMEM; 3797 3798 pos = skb_put(skb, rates + 2); 3799 *pos++ = WLAN_EID_SUPP_RATES; 3800 *pos++ = rates; 3801 for (i = 0; i < rates; i++) { 3802 u8 basic = 0; 3803 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3804 continue; 3805 3806 if (need_basic && basic_rates & BIT(i)) 3807 basic = 0x80; 3808 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3809 5 * (1 << shift)); 3810 *pos++ = basic | (u8) rate; 3811 } 3812 3813 return 0; 3814 } 3815 3816 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3817 struct sk_buff *skb, bool need_basic, 3818 enum nl80211_band band) 3819 { 3820 struct ieee80211_local *local = sdata->local; 3821 struct ieee80211_supported_band *sband; 3822 int rate, shift; 3823 u8 i, exrates, *pos; 3824 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3825 u32 rate_flags; 3826 3827 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3828 shift = ieee80211_vif_get_shift(&sdata->vif); 3829 3830 sband = local->hw.wiphy->bands[band]; 3831 exrates = 0; 3832 for (i = 0; i < sband->n_bitrates; i++) { 3833 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3834 continue; 3835 exrates++; 3836 } 3837 3838 if (exrates > 8) 3839 exrates -= 8; 3840 else 3841 exrates = 0; 3842 3843 if (skb_tailroom(skb) < exrates + 2) 3844 return -ENOMEM; 3845 3846 if (exrates) { 3847 pos = skb_put(skb, exrates + 2); 3848 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3849 *pos++ = exrates; 3850 for (i = 8; i < sband->n_bitrates; i++) { 3851 u8 basic = 0; 3852 if ((rate_flags & sband->bitrates[i].flags) 3853 != rate_flags) 3854 continue; 3855 if (need_basic && basic_rates & BIT(i)) 3856 basic = 0x80; 3857 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3858 5 * (1 << shift)); 3859 *pos++ = basic | (u8) rate; 3860 } 3861 } 3862 return 0; 3863 } 3864 3865 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3866 { 3867 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3868 3869 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3870 return 0; 3871 3872 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 3873 } 3874 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3875 3876 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3877 { 3878 if (!mcs) 3879 return 1; 3880 3881 /* TODO: consider rx_highest */ 3882 3883 if (mcs->rx_mask[3]) 3884 return 4; 3885 if (mcs->rx_mask[2]) 3886 return 3; 3887 if (mcs->rx_mask[1]) 3888 return 2; 3889 return 1; 3890 } 3891 3892 /** 3893 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3894 * @local: mac80211 hw info struct 3895 * @status: RX status 3896 * @mpdu_len: total MPDU length (including FCS) 3897 * @mpdu_offset: offset into MPDU to calculate timestamp at 3898 * 3899 * This function calculates the RX timestamp at the given MPDU offset, taking 3900 * into account what the RX timestamp was. An offset of 0 will just normalize 3901 * the timestamp to TSF at beginning of MPDU reception. 3902 */ 3903 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3904 struct ieee80211_rx_status *status, 3905 unsigned int mpdu_len, 3906 unsigned int mpdu_offset) 3907 { 3908 u64 ts = status->mactime; 3909 struct rate_info ri; 3910 u16 rate; 3911 u8 n_ltf; 3912 3913 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3914 return 0; 3915 3916 memset(&ri, 0, sizeof(ri)); 3917 3918 ri.bw = status->bw; 3919 3920 /* Fill cfg80211 rate info */ 3921 switch (status->encoding) { 3922 case RX_ENC_HE: 3923 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3924 ri.mcs = status->rate_idx; 3925 ri.nss = status->nss; 3926 ri.he_ru_alloc = status->he_ru; 3927 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3928 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3929 3930 /* 3931 * See P802.11ax_D6.0, section 27.3.4 for 3932 * VHT PPDU format. 3933 */ 3934 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3935 mpdu_offset += 2; 3936 ts += 36; 3937 3938 /* 3939 * TODO: 3940 * For HE MU PPDU, add the HE-SIG-B. 3941 * For HE ER PPDU, add 8us for the HE-SIG-A. 3942 * For HE TB PPDU, add 4us for the HE-STF. 3943 * Add the HE-LTF durations - variable. 3944 */ 3945 } 3946 3947 break; 3948 case RX_ENC_HT: 3949 ri.mcs = status->rate_idx; 3950 ri.flags |= RATE_INFO_FLAGS_MCS; 3951 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3952 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3953 3954 /* 3955 * See P802.11REVmd_D3.0, section 19.3.2 for 3956 * HT PPDU format. 3957 */ 3958 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3959 mpdu_offset += 2; 3960 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3961 ts += 24; 3962 else 3963 ts += 32; 3964 3965 /* 3966 * Add Data HT-LTFs per streams 3967 * TODO: add Extension HT-LTFs, 4us per LTF 3968 */ 3969 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3970 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3971 ts += n_ltf * 4; 3972 } 3973 3974 break; 3975 case RX_ENC_VHT: 3976 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3977 ri.mcs = status->rate_idx; 3978 ri.nss = status->nss; 3979 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3980 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3981 3982 /* 3983 * See P802.11REVmd_D3.0, section 21.3.2 for 3984 * VHT PPDU format. 3985 */ 3986 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3987 mpdu_offset += 2; 3988 ts += 36; 3989 3990 /* 3991 * Add VHT-LTFs per streams 3992 */ 3993 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3994 ri.nss + 1 : ri.nss; 3995 ts += 4 * n_ltf; 3996 } 3997 3998 break; 3999 default: 4000 WARN_ON(1); 4001 fallthrough; 4002 case RX_ENC_LEGACY: { 4003 struct ieee80211_supported_band *sband; 4004 int shift = 0; 4005 int bitrate; 4006 4007 switch (status->bw) { 4008 case RATE_INFO_BW_10: 4009 shift = 1; 4010 break; 4011 case RATE_INFO_BW_5: 4012 shift = 2; 4013 break; 4014 } 4015 4016 sband = local->hw.wiphy->bands[status->band]; 4017 bitrate = sband->bitrates[status->rate_idx].bitrate; 4018 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 4019 4020 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4021 if (status->band == NL80211_BAND_5GHZ) { 4022 ts += 20 << shift; 4023 mpdu_offset += 2; 4024 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 4025 ts += 96; 4026 } else { 4027 ts += 192; 4028 } 4029 } 4030 break; 4031 } 4032 } 4033 4034 rate = cfg80211_calculate_bitrate(&ri); 4035 if (WARN_ONCE(!rate, 4036 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 4037 (unsigned long long)status->flag, status->rate_idx, 4038 status->nss)) 4039 return 0; 4040 4041 /* rewind from end of MPDU */ 4042 if (status->flag & RX_FLAG_MACTIME_END) 4043 ts -= mpdu_len * 8 * 10 / rate; 4044 4045 ts += mpdu_offset * 8 * 10 / rate; 4046 4047 return ts; 4048 } 4049 4050 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 4051 { 4052 struct ieee80211_sub_if_data *sdata; 4053 struct cfg80211_chan_def chandef; 4054 4055 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 4056 lockdep_assert_wiphy(local->hw.wiphy); 4057 4058 mutex_lock(&local->mtx); 4059 list_for_each_entry(sdata, &local->interfaces, list) { 4060 /* it might be waiting for the local->mtx, but then 4061 * by the time it gets it, sdata->wdev.cac_started 4062 * will no longer be true 4063 */ 4064 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work); 4065 4066 if (sdata->wdev.cac_started) { 4067 chandef = sdata->vif.bss_conf.chandef; 4068 ieee80211_link_release_channel(&sdata->deflink); 4069 cfg80211_cac_event(sdata->dev, 4070 &chandef, 4071 NL80211_RADAR_CAC_ABORTED, 4072 GFP_KERNEL); 4073 } 4074 } 4075 mutex_unlock(&local->mtx); 4076 } 4077 4078 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 4079 { 4080 struct ieee80211_local *local = 4081 container_of(work, struct ieee80211_local, radar_detected_work); 4082 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 4083 struct ieee80211_chanctx *ctx; 4084 int num_chanctx = 0; 4085 4086 mutex_lock(&local->chanctx_mtx); 4087 list_for_each_entry(ctx, &local->chanctx_list, list) { 4088 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 4089 continue; 4090 4091 num_chanctx++; 4092 chandef = ctx->conf.def; 4093 } 4094 mutex_unlock(&local->chanctx_mtx); 4095 4096 wiphy_lock(local->hw.wiphy); 4097 ieee80211_dfs_cac_cancel(local); 4098 wiphy_unlock(local->hw.wiphy); 4099 4100 if (num_chanctx > 1) 4101 /* XXX: multi-channel is not supported yet */ 4102 WARN_ON(1); 4103 else 4104 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 4105 } 4106 4107 void ieee80211_radar_detected(struct ieee80211_hw *hw) 4108 { 4109 struct ieee80211_local *local = hw_to_local(hw); 4110 4111 trace_api_radar_detected(local); 4112 4113 schedule_work(&local->radar_detected_work); 4114 } 4115 EXPORT_SYMBOL(ieee80211_radar_detected); 4116 4117 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 4118 { 4119 ieee80211_conn_flags_t ret; 4120 int tmp; 4121 4122 switch (c->width) { 4123 case NL80211_CHAN_WIDTH_20: 4124 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4125 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4126 break; 4127 case NL80211_CHAN_WIDTH_40: 4128 c->width = NL80211_CHAN_WIDTH_20; 4129 c->center_freq1 = c->chan->center_freq; 4130 ret = IEEE80211_CONN_DISABLE_40MHZ | 4131 IEEE80211_CONN_DISABLE_VHT; 4132 break; 4133 case NL80211_CHAN_WIDTH_80: 4134 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 4135 /* n_P40 */ 4136 tmp /= 2; 4137 /* freq_P40 */ 4138 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 4139 c->width = NL80211_CHAN_WIDTH_40; 4140 ret = IEEE80211_CONN_DISABLE_VHT; 4141 break; 4142 case NL80211_CHAN_WIDTH_80P80: 4143 c->center_freq2 = 0; 4144 c->width = NL80211_CHAN_WIDTH_80; 4145 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4146 IEEE80211_CONN_DISABLE_160MHZ; 4147 break; 4148 case NL80211_CHAN_WIDTH_160: 4149 /* n_P20 */ 4150 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 4151 /* n_P80 */ 4152 tmp /= 4; 4153 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 4154 c->width = NL80211_CHAN_WIDTH_80; 4155 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4156 IEEE80211_CONN_DISABLE_160MHZ; 4157 break; 4158 case NL80211_CHAN_WIDTH_320: 4159 /* n_P20 */ 4160 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; 4161 /* n_P160 */ 4162 tmp /= 8; 4163 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp; 4164 c->width = NL80211_CHAN_WIDTH_160; 4165 ret = IEEE80211_CONN_DISABLE_320MHZ; 4166 break; 4167 default: 4168 case NL80211_CHAN_WIDTH_20_NOHT: 4169 WARN_ON_ONCE(1); 4170 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4171 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4172 break; 4173 case NL80211_CHAN_WIDTH_1: 4174 case NL80211_CHAN_WIDTH_2: 4175 case NL80211_CHAN_WIDTH_4: 4176 case NL80211_CHAN_WIDTH_8: 4177 case NL80211_CHAN_WIDTH_16: 4178 case NL80211_CHAN_WIDTH_5: 4179 case NL80211_CHAN_WIDTH_10: 4180 WARN_ON_ONCE(1); 4181 /* keep c->width */ 4182 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4183 break; 4184 } 4185 4186 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 4187 4188 return ret; 4189 } 4190 4191 /* 4192 * Returns true if smps_mode_new is strictly more restrictive than 4193 * smps_mode_old. 4194 */ 4195 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 4196 enum ieee80211_smps_mode smps_mode_new) 4197 { 4198 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 4199 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 4200 return false; 4201 4202 switch (smps_mode_old) { 4203 case IEEE80211_SMPS_STATIC: 4204 return false; 4205 case IEEE80211_SMPS_DYNAMIC: 4206 return smps_mode_new == IEEE80211_SMPS_STATIC; 4207 case IEEE80211_SMPS_OFF: 4208 return smps_mode_new != IEEE80211_SMPS_OFF; 4209 default: 4210 WARN_ON(1); 4211 } 4212 4213 return false; 4214 } 4215 4216 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 4217 struct cfg80211_csa_settings *csa_settings) 4218 { 4219 struct sk_buff *skb; 4220 struct ieee80211_mgmt *mgmt; 4221 struct ieee80211_local *local = sdata->local; 4222 int freq; 4223 int hdr_len = offsetofend(struct ieee80211_mgmt, 4224 u.action.u.chan_switch); 4225 u8 *pos; 4226 4227 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 4228 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 4229 return -EOPNOTSUPP; 4230 4231 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 4232 5 + /* channel switch announcement element */ 4233 3 + /* secondary channel offset element */ 4234 5 + /* wide bandwidth channel switch announcement */ 4235 8); /* mesh channel switch parameters element */ 4236 if (!skb) 4237 return -ENOMEM; 4238 4239 skb_reserve(skb, local->tx_headroom); 4240 mgmt = skb_put_zero(skb, hdr_len); 4241 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 4242 IEEE80211_STYPE_ACTION); 4243 4244 eth_broadcast_addr(mgmt->da); 4245 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 4246 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4247 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 4248 } else { 4249 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 4250 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 4251 } 4252 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 4253 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 4254 pos = skb_put(skb, 5); 4255 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 4256 *pos++ = 3; /* IE length */ 4257 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 4258 freq = csa_settings->chandef.chan->center_freq; 4259 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 4260 *pos++ = csa_settings->count; /* count */ 4261 4262 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 4263 enum nl80211_channel_type ch_type; 4264 4265 skb_put(skb, 3); 4266 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 4267 *pos++ = 1; /* IE length */ 4268 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 4269 if (ch_type == NL80211_CHAN_HT40PLUS) 4270 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 4271 else 4272 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 4273 } 4274 4275 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4276 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 4277 4278 skb_put(skb, 8); 4279 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 4280 *pos++ = 6; /* IE length */ 4281 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 4282 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 4283 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 4284 *pos++ |= csa_settings->block_tx ? 4285 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 4286 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 4287 pos += 2; 4288 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 4289 pos += 2; 4290 } 4291 4292 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 4293 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 4294 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 4295 skb_put(skb, 5); 4296 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 4297 } 4298 4299 ieee80211_tx_skb(sdata, skb); 4300 return 0; 4301 } 4302 4303 static bool 4304 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 4305 { 4306 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 4307 int skip; 4308 4309 if (end > 0) 4310 return false; 4311 4312 /* One shot NOA */ 4313 if (data->count[i] == 1) 4314 return false; 4315 4316 if (data->desc[i].interval == 0) 4317 return false; 4318 4319 /* End time is in the past, check for repetitions */ 4320 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4321 if (data->count[i] < 255) { 4322 if (data->count[i] <= skip) { 4323 data->count[i] = 0; 4324 return false; 4325 } 4326 4327 data->count[i] -= skip; 4328 } 4329 4330 data->desc[i].start += skip * data->desc[i].interval; 4331 4332 return true; 4333 } 4334 4335 static bool 4336 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4337 s32 *offset) 4338 { 4339 bool ret = false; 4340 int i; 4341 4342 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4343 s32 cur; 4344 4345 if (!data->count[i]) 4346 continue; 4347 4348 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4349 ret = true; 4350 4351 cur = data->desc[i].start - tsf; 4352 if (cur > *offset) 4353 continue; 4354 4355 cur = data->desc[i].start + data->desc[i].duration - tsf; 4356 if (cur > *offset) 4357 *offset = cur; 4358 } 4359 4360 return ret; 4361 } 4362 4363 static u32 4364 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4365 { 4366 s32 offset = 0; 4367 int tries = 0; 4368 /* 4369 * arbitrary limit, used to avoid infinite loops when combined NoA 4370 * descriptors cover the full time period. 4371 */ 4372 int max_tries = 5; 4373 4374 ieee80211_extend_absent_time(data, tsf, &offset); 4375 do { 4376 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4377 break; 4378 4379 tries++; 4380 } while (tries < max_tries); 4381 4382 return offset; 4383 } 4384 4385 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4386 { 4387 u32 next_offset = BIT(31) - 1; 4388 int i; 4389 4390 data->absent = 0; 4391 data->has_next_tsf = false; 4392 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4393 s32 start; 4394 4395 if (!data->count[i]) 4396 continue; 4397 4398 ieee80211_extend_noa_desc(data, tsf, i); 4399 start = data->desc[i].start - tsf; 4400 if (start <= 0) 4401 data->absent |= BIT(i); 4402 4403 if (next_offset > start) 4404 next_offset = start; 4405 4406 data->has_next_tsf = true; 4407 } 4408 4409 if (data->absent) 4410 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4411 4412 data->next_tsf = tsf + next_offset; 4413 } 4414 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4415 4416 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4417 struct ieee80211_noa_data *data, u32 tsf) 4418 { 4419 int ret = 0; 4420 int i; 4421 4422 memset(data, 0, sizeof(*data)); 4423 4424 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4425 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4426 4427 if (!desc->count || !desc->duration) 4428 continue; 4429 4430 data->count[i] = desc->count; 4431 data->desc[i].start = le32_to_cpu(desc->start_time); 4432 data->desc[i].duration = le32_to_cpu(desc->duration); 4433 data->desc[i].interval = le32_to_cpu(desc->interval); 4434 4435 if (data->count[i] > 1 && 4436 data->desc[i].interval < data->desc[i].duration) 4437 continue; 4438 4439 ieee80211_extend_noa_desc(data, tsf, i); 4440 ret++; 4441 } 4442 4443 if (ret) 4444 ieee80211_update_p2p_noa(data, tsf); 4445 4446 return ret; 4447 } 4448 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4449 4450 void ieee80211_recalc_dtim(struct ieee80211_local *local, 4451 struct ieee80211_sub_if_data *sdata) 4452 { 4453 u64 tsf = drv_get_tsf(local, sdata); 4454 u64 dtim_count = 0; 4455 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4456 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4457 struct ps_data *ps; 4458 u8 bcns_from_dtim; 4459 4460 if (tsf == -1ULL || !beacon_int || !dtim_period) 4461 return; 4462 4463 if (sdata->vif.type == NL80211_IFTYPE_AP || 4464 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4465 if (!sdata->bss) 4466 return; 4467 4468 ps = &sdata->bss->ps; 4469 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4470 ps = &sdata->u.mesh.ps; 4471 } else { 4472 return; 4473 } 4474 4475 /* 4476 * actually finds last dtim_count, mac80211 will update in 4477 * __beacon_add_tim(). 4478 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4479 */ 4480 do_div(tsf, beacon_int); 4481 bcns_from_dtim = do_div(tsf, dtim_period); 4482 /* just had a DTIM */ 4483 if (!bcns_from_dtim) 4484 dtim_count = 0; 4485 else 4486 dtim_count = dtim_period - bcns_from_dtim; 4487 4488 ps->dtim_count = dtim_count; 4489 } 4490 4491 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4492 struct ieee80211_chanctx *ctx) 4493 { 4494 struct ieee80211_link_data *link; 4495 u8 radar_detect = 0; 4496 4497 lockdep_assert_held(&local->chanctx_mtx); 4498 4499 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4500 return 0; 4501 4502 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list) 4503 if (link->reserved_radar_required) 4504 radar_detect |= BIT(link->reserved_chandef.width); 4505 4506 /* 4507 * An in-place reservation context should not have any assigned vifs 4508 * until it replaces the other context. 4509 */ 4510 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 4511 !list_empty(&ctx->assigned_links)); 4512 4513 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) { 4514 if (!link->radar_required) 4515 continue; 4516 4517 radar_detect |= 4518 BIT(link->conf->chandef.width); 4519 } 4520 4521 return radar_detect; 4522 } 4523 4524 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4525 const struct cfg80211_chan_def *chandef, 4526 enum ieee80211_chanctx_mode chanmode, 4527 u8 radar_detect) 4528 { 4529 struct ieee80211_local *local = sdata->local; 4530 struct ieee80211_sub_if_data *sdata_iter; 4531 enum nl80211_iftype iftype = sdata->wdev.iftype; 4532 struct ieee80211_chanctx *ctx; 4533 int total = 1; 4534 struct iface_combination_params params = { 4535 .radar_detect = radar_detect, 4536 }; 4537 4538 lockdep_assert_held(&local->chanctx_mtx); 4539 4540 if (WARN_ON(hweight32(radar_detect) > 1)) 4541 return -EINVAL; 4542 4543 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4544 !chandef->chan)) 4545 return -EINVAL; 4546 4547 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4548 return -EINVAL; 4549 4550 if (sdata->vif.type == NL80211_IFTYPE_AP || 4551 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4552 /* 4553 * always passing this is harmless, since it'll be the 4554 * same value that cfg80211 finds if it finds the same 4555 * interface ... and that's always allowed 4556 */ 4557 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4558 } 4559 4560 /* Always allow software iftypes */ 4561 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4562 if (radar_detect) 4563 return -EINVAL; 4564 return 0; 4565 } 4566 4567 if (chandef) 4568 params.num_different_channels = 1; 4569 4570 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4571 params.iftype_num[iftype] = 1; 4572 4573 list_for_each_entry(ctx, &local->chanctx_list, list) { 4574 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4575 continue; 4576 params.radar_detect |= 4577 ieee80211_chanctx_radar_detect(local, ctx); 4578 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 4579 params.num_different_channels++; 4580 continue; 4581 } 4582 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4583 cfg80211_chandef_compatible(chandef, 4584 &ctx->conf.def)) 4585 continue; 4586 params.num_different_channels++; 4587 } 4588 4589 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 4590 struct wireless_dev *wdev_iter; 4591 4592 wdev_iter = &sdata_iter->wdev; 4593 4594 if (sdata_iter == sdata || 4595 !ieee80211_sdata_running(sdata_iter) || 4596 cfg80211_iftype_allowed(local->hw.wiphy, 4597 wdev_iter->iftype, 0, 1)) 4598 continue; 4599 4600 params.iftype_num[wdev_iter->iftype]++; 4601 total++; 4602 } 4603 4604 if (total == 1 && !params.radar_detect) 4605 return 0; 4606 4607 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4608 } 4609 4610 static void 4611 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4612 void *data) 4613 { 4614 u32 *max_num_different_channels = data; 4615 4616 *max_num_different_channels = max(*max_num_different_channels, 4617 c->num_different_channels); 4618 } 4619 4620 int ieee80211_max_num_channels(struct ieee80211_local *local) 4621 { 4622 struct ieee80211_sub_if_data *sdata; 4623 struct ieee80211_chanctx *ctx; 4624 u32 max_num_different_channels = 1; 4625 int err; 4626 struct iface_combination_params params = {0}; 4627 4628 lockdep_assert_held(&local->chanctx_mtx); 4629 4630 list_for_each_entry(ctx, &local->chanctx_list, list) { 4631 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4632 continue; 4633 4634 params.num_different_channels++; 4635 4636 params.radar_detect |= 4637 ieee80211_chanctx_radar_detect(local, ctx); 4638 } 4639 4640 list_for_each_entry_rcu(sdata, &local->interfaces, list) 4641 params.iftype_num[sdata->wdev.iftype]++; 4642 4643 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4644 ieee80211_iter_max_chans, 4645 &max_num_different_channels); 4646 if (err < 0) 4647 return err; 4648 4649 return max_num_different_channels; 4650 } 4651 4652 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4653 struct ieee80211_sta_s1g_cap *caps, 4654 struct sk_buff *skb) 4655 { 4656 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4657 struct ieee80211_s1g_cap s1g_capab; 4658 u8 *pos; 4659 int i; 4660 4661 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4662 return; 4663 4664 if (!caps->s1g) 4665 return; 4666 4667 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4668 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4669 4670 /* override the capability info */ 4671 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4672 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4673 4674 s1g_capab.capab_info[i] &= ~mask; 4675 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4676 } 4677 4678 /* then MCS and NSS set */ 4679 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4680 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4681 4682 s1g_capab.supp_mcs_nss[i] &= ~mask; 4683 s1g_capab.supp_mcs_nss[i] |= 4684 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4685 } 4686 4687 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4688 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4689 *pos++ = sizeof(s1g_capab); 4690 4691 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4692 } 4693 4694 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4695 struct sk_buff *skb) 4696 { 4697 u8 *pos = skb_put(skb, 3); 4698 4699 *pos++ = WLAN_EID_AID_REQUEST; 4700 *pos++ = 1; 4701 *pos++ = 0; 4702 } 4703 4704 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4705 { 4706 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4707 *buf++ = 7; /* len */ 4708 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4709 *buf++ = 0x50; 4710 *buf++ = 0xf2; 4711 *buf++ = 2; /* WME */ 4712 *buf++ = 0; /* WME info */ 4713 *buf++ = 1; /* WME ver */ 4714 *buf++ = qosinfo; /* U-APSD no in use */ 4715 4716 return buf; 4717 } 4718 4719 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4720 unsigned long *frame_cnt, 4721 unsigned long *byte_cnt) 4722 { 4723 struct txq_info *txqi = to_txq_info(txq); 4724 u32 frag_cnt = 0, frag_bytes = 0; 4725 struct sk_buff *skb; 4726 4727 skb_queue_walk(&txqi->frags, skb) { 4728 frag_cnt++; 4729 frag_bytes += skb->len; 4730 } 4731 4732 if (frame_cnt) 4733 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4734 4735 if (byte_cnt) 4736 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4737 } 4738 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4739 4740 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4741 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4742 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4743 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4744 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4745 }; 4746 4747 u16 ieee80211_encode_usf(int listen_interval) 4748 { 4749 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4750 u16 ui, usf = 0; 4751 4752 /* find greatest USF */ 4753 while (usf < IEEE80211_MAX_USF) { 4754 if (listen_interval % listen_int_usf[usf + 1]) 4755 break; 4756 usf += 1; 4757 } 4758 ui = listen_interval / listen_int_usf[usf]; 4759 4760 /* error if there is a remainder. Should've been checked by user */ 4761 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4762 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4763 FIELD_PREP(LISTEN_INT_UI, ui); 4764 4765 return (u16) listen_interval; 4766 } 4767 4768 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 4769 { 4770 const struct ieee80211_sta_he_cap *he_cap; 4771 const struct ieee80211_sta_eht_cap *eht_cap; 4772 struct ieee80211_supported_band *sband; 4773 u8 n; 4774 4775 sband = ieee80211_get_sband(sdata); 4776 if (!sband) 4777 return 0; 4778 4779 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 4780 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 4781 if (!he_cap || !eht_cap) 4782 return 0; 4783 4784 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4785 &eht_cap->eht_cap_elem); 4786 return 2 + 1 + 4787 sizeof(he_cap->he_cap_elem) + n + 4788 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4789 eht_cap->eht_cap_elem.phy_cap_info); 4790 return 0; 4791 } 4792 4793 u8 *ieee80211_ie_build_eht_cap(u8 *pos, 4794 const struct ieee80211_sta_he_cap *he_cap, 4795 const struct ieee80211_sta_eht_cap *eht_cap, 4796 u8 *end) 4797 { 4798 u8 mcs_nss_len, ppet_len; 4799 u8 ie_len; 4800 u8 *orig_pos = pos; 4801 4802 /* Make sure we have place for the IE */ 4803 if (!he_cap || !eht_cap) 4804 return orig_pos; 4805 4806 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4807 &eht_cap->eht_cap_elem); 4808 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4809 eht_cap->eht_cap_elem.phy_cap_info); 4810 4811 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4812 if ((end - pos) < ie_len) 4813 return orig_pos; 4814 4815 *pos++ = WLAN_EID_EXTENSION; 4816 *pos++ = ie_len - 2; 4817 *pos++ = WLAN_EID_EXT_EHT_CAPABILITY; 4818 4819 /* Fixed data */ 4820 memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem)); 4821 pos += sizeof(eht_cap->eht_cap_elem); 4822 4823 memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4824 pos += mcs_nss_len; 4825 4826 if (ppet_len) { 4827 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len); 4828 pos += ppet_len; 4829 } 4830 4831 return pos; 4832 } 4833 4834 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos) 4835 { 4836 unsigned int elem_len; 4837 4838 if (!len_pos) 4839 return; 4840 4841 elem_len = skb->data + skb->len - len_pos - 1; 4842 4843 while (elem_len > 255) { 4844 /* this one is 255 */ 4845 *len_pos = 255; 4846 /* remaining data gets smaller */ 4847 elem_len -= 255; 4848 /* make space for the fragment ID/len in SKB */ 4849 skb_put(skb, 2); 4850 /* shift back the remaining data to place fragment ID/len */ 4851 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 4852 /* place the fragment ID */ 4853 len_pos += 255 + 1; 4854 *len_pos = WLAN_EID_FRAGMENT; 4855 /* and point to fragment length to update later */ 4856 len_pos++; 4857 } 4858 4859 *len_pos = elem_len; 4860 } 4861