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 958 ieee80211_parse_extension_element(u32 *crc, 959 const struct element *elem, 960 struct ieee802_11_elems *elems, 961 struct ieee80211_elems_parse_params *params) 962 { 963 const void *data = elem->data + 1; 964 u8 len; 965 966 if (!elem->datalen) 967 return; 968 969 len = elem->datalen - 1; 970 971 switch (elem->data[0]) { 972 case WLAN_EID_EXT_HE_MU_EDCA: 973 if (len >= sizeof(*elems->mu_edca_param_set)) { 974 elems->mu_edca_param_set = data; 975 if (crc) 976 *crc = crc32_be(*crc, (void *)elem, 977 elem->datalen + 2); 978 } 979 break; 980 case WLAN_EID_EXT_HE_CAPABILITY: 981 if (ieee80211_he_capa_size_ok(data, len)) { 982 elems->he_cap = data; 983 elems->he_cap_len = len; 984 } 985 break; 986 case WLAN_EID_EXT_HE_OPERATION: 987 if (len >= sizeof(*elems->he_operation) && 988 len >= ieee80211_he_oper_size(data) - 1) { 989 if (crc) 990 *crc = crc32_be(*crc, (void *)elem, 991 elem->datalen + 2); 992 elems->he_operation = data; 993 } 994 break; 995 case WLAN_EID_EXT_UORA: 996 if (len >= 1) 997 elems->uora_element = data; 998 break; 999 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 1000 if (len == 3) 1001 elems->max_channel_switch_time = data; 1002 break; 1003 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 1004 if (len >= sizeof(*elems->mbssid_config_ie)) 1005 elems->mbssid_config_ie = data; 1006 break; 1007 case WLAN_EID_EXT_HE_SPR: 1008 if (len >= sizeof(*elems->he_spr) && 1009 len >= ieee80211_he_spr_size(data)) 1010 elems->he_spr = data; 1011 break; 1012 case WLAN_EID_EXT_HE_6GHZ_CAPA: 1013 if (len >= sizeof(*elems->he_6ghz_capa)) 1014 elems->he_6ghz_capa = data; 1015 break; 1016 case WLAN_EID_EXT_EHT_CAPABILITY: 1017 if (ieee80211_eht_capa_size_ok(elems->he_cap, 1018 data, len, 1019 params->from_ap)) { 1020 elems->eht_cap = data; 1021 elems->eht_cap_len = len; 1022 } 1023 break; 1024 case WLAN_EID_EXT_EHT_OPERATION: 1025 if (ieee80211_eht_oper_size_ok(data, len)) 1026 elems->eht_operation = data; 1027 break; 1028 case WLAN_EID_EXT_EHT_MULTI_LINK: 1029 if (ieee80211_mle_size_ok(data, len)) 1030 elems->multi_link = (void *)data; 1031 break; 1032 } 1033 } 1034 1035 static u32 1036 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params, 1037 struct ieee802_11_elems *elems, 1038 const struct element *check_inherit) 1039 { 1040 const struct element *elem; 1041 bool calc_crc = params->filter != 0; 1042 DECLARE_BITMAP(seen_elems, 256); 1043 u32 crc = params->crc; 1044 const u8 *ie; 1045 1046 bitmap_zero(seen_elems, 256); 1047 1048 for_each_element(elem, params->start, params->len) { 1049 bool elem_parse_failed; 1050 u8 id = elem->id; 1051 u8 elen = elem->datalen; 1052 const u8 *pos = elem->data; 1053 1054 if (check_inherit && 1055 !cfg80211_is_element_inherited(elem, 1056 check_inherit)) 1057 continue; 1058 1059 switch (id) { 1060 case WLAN_EID_SSID: 1061 case WLAN_EID_SUPP_RATES: 1062 case WLAN_EID_FH_PARAMS: 1063 case WLAN_EID_DS_PARAMS: 1064 case WLAN_EID_CF_PARAMS: 1065 case WLAN_EID_TIM: 1066 case WLAN_EID_IBSS_PARAMS: 1067 case WLAN_EID_CHALLENGE: 1068 case WLAN_EID_RSN: 1069 case WLAN_EID_ERP_INFO: 1070 case WLAN_EID_EXT_SUPP_RATES: 1071 case WLAN_EID_HT_CAPABILITY: 1072 case WLAN_EID_HT_OPERATION: 1073 case WLAN_EID_VHT_CAPABILITY: 1074 case WLAN_EID_VHT_OPERATION: 1075 case WLAN_EID_MESH_ID: 1076 case WLAN_EID_MESH_CONFIG: 1077 case WLAN_EID_PEER_MGMT: 1078 case WLAN_EID_PREQ: 1079 case WLAN_EID_PREP: 1080 case WLAN_EID_PERR: 1081 case WLAN_EID_RANN: 1082 case WLAN_EID_CHANNEL_SWITCH: 1083 case WLAN_EID_EXT_CHANSWITCH_ANN: 1084 case WLAN_EID_COUNTRY: 1085 case WLAN_EID_PWR_CONSTRAINT: 1086 case WLAN_EID_TIMEOUT_INTERVAL: 1087 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1088 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1089 case WLAN_EID_CHAN_SWITCH_PARAM: 1090 case WLAN_EID_EXT_CAPABILITY: 1091 case WLAN_EID_CHAN_SWITCH_TIMING: 1092 case WLAN_EID_LINK_ID: 1093 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1094 case WLAN_EID_RSNX: 1095 case WLAN_EID_S1G_BCN_COMPAT: 1096 case WLAN_EID_S1G_CAPABILITIES: 1097 case WLAN_EID_S1G_OPERATION: 1098 case WLAN_EID_AID_RESPONSE: 1099 case WLAN_EID_S1G_SHORT_BCN_INTERVAL: 1100 /* 1101 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1102 * that if the content gets bigger it might be needed more than once 1103 */ 1104 if (test_bit(id, seen_elems)) { 1105 elems->parse_error = true; 1106 continue; 1107 } 1108 break; 1109 } 1110 1111 if (calc_crc && id < 64 && (params->filter & (1ULL << id))) 1112 crc = crc32_be(crc, pos - 2, elen + 2); 1113 1114 elem_parse_failed = false; 1115 1116 switch (id) { 1117 case WLAN_EID_LINK_ID: 1118 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) { 1119 elem_parse_failed = true; 1120 break; 1121 } 1122 elems->lnk_id = (void *)(pos - 2); 1123 break; 1124 case WLAN_EID_CHAN_SWITCH_TIMING: 1125 if (elen < sizeof(struct ieee80211_ch_switch_timing)) { 1126 elem_parse_failed = true; 1127 break; 1128 } 1129 elems->ch_sw_timing = (void *)pos; 1130 break; 1131 case WLAN_EID_EXT_CAPABILITY: 1132 elems->ext_capab = pos; 1133 elems->ext_capab_len = elen; 1134 break; 1135 case WLAN_EID_SSID: 1136 elems->ssid = pos; 1137 elems->ssid_len = elen; 1138 break; 1139 case WLAN_EID_SUPP_RATES: 1140 elems->supp_rates = pos; 1141 elems->supp_rates_len = elen; 1142 break; 1143 case WLAN_EID_DS_PARAMS: 1144 if (elen >= 1) 1145 elems->ds_params = pos; 1146 else 1147 elem_parse_failed = true; 1148 break; 1149 case WLAN_EID_TIM: 1150 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1151 elems->tim = (void *)pos; 1152 elems->tim_len = elen; 1153 } else 1154 elem_parse_failed = true; 1155 break; 1156 case WLAN_EID_VENDOR_SPECIFIC: 1157 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1158 pos[2] == 0xf2) { 1159 /* Microsoft OUI (00:50:F2) */ 1160 1161 if (calc_crc) 1162 crc = crc32_be(crc, pos - 2, elen + 2); 1163 1164 if (elen >= 5 && pos[3] == 2) { 1165 /* OUI Type 2 - WMM IE */ 1166 if (pos[4] == 0) { 1167 elems->wmm_info = pos; 1168 elems->wmm_info_len = elen; 1169 } else if (pos[4] == 1) { 1170 elems->wmm_param = pos; 1171 elems->wmm_param_len = elen; 1172 } 1173 } 1174 } 1175 break; 1176 case WLAN_EID_RSN: 1177 elems->rsn = pos; 1178 elems->rsn_len = elen; 1179 break; 1180 case WLAN_EID_ERP_INFO: 1181 if (elen >= 1) 1182 elems->erp_info = pos; 1183 else 1184 elem_parse_failed = true; 1185 break; 1186 case WLAN_EID_EXT_SUPP_RATES: 1187 elems->ext_supp_rates = pos; 1188 elems->ext_supp_rates_len = elen; 1189 break; 1190 case WLAN_EID_HT_CAPABILITY: 1191 if (elen >= sizeof(struct ieee80211_ht_cap)) 1192 elems->ht_cap_elem = (void *)pos; 1193 else 1194 elem_parse_failed = true; 1195 break; 1196 case WLAN_EID_HT_OPERATION: 1197 if (elen >= sizeof(struct ieee80211_ht_operation)) 1198 elems->ht_operation = (void *)pos; 1199 else 1200 elem_parse_failed = true; 1201 break; 1202 case WLAN_EID_VHT_CAPABILITY: 1203 if (elen >= sizeof(struct ieee80211_vht_cap)) 1204 elems->vht_cap_elem = (void *)pos; 1205 else 1206 elem_parse_failed = true; 1207 break; 1208 case WLAN_EID_VHT_OPERATION: 1209 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1210 elems->vht_operation = (void *)pos; 1211 if (calc_crc) 1212 crc = crc32_be(crc, pos - 2, elen + 2); 1213 break; 1214 } 1215 elem_parse_failed = true; 1216 break; 1217 case WLAN_EID_OPMODE_NOTIF: 1218 if (elen > 0) { 1219 elems->opmode_notif = pos; 1220 if (calc_crc) 1221 crc = crc32_be(crc, pos - 2, elen + 2); 1222 break; 1223 } 1224 elem_parse_failed = true; 1225 break; 1226 case WLAN_EID_MESH_ID: 1227 elems->mesh_id = pos; 1228 elems->mesh_id_len = elen; 1229 break; 1230 case WLAN_EID_MESH_CONFIG: 1231 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1232 elems->mesh_config = (void *)pos; 1233 else 1234 elem_parse_failed = true; 1235 break; 1236 case WLAN_EID_PEER_MGMT: 1237 elems->peering = pos; 1238 elems->peering_len = elen; 1239 break; 1240 case WLAN_EID_MESH_AWAKE_WINDOW: 1241 if (elen >= 2) 1242 elems->awake_window = (void *)pos; 1243 break; 1244 case WLAN_EID_PREQ: 1245 elems->preq = pos; 1246 elems->preq_len = elen; 1247 break; 1248 case WLAN_EID_PREP: 1249 elems->prep = pos; 1250 elems->prep_len = elen; 1251 break; 1252 case WLAN_EID_PERR: 1253 elems->perr = pos; 1254 elems->perr_len = elen; 1255 break; 1256 case WLAN_EID_RANN: 1257 if (elen >= sizeof(struct ieee80211_rann_ie)) 1258 elems->rann = (void *)pos; 1259 else 1260 elem_parse_failed = true; 1261 break; 1262 case WLAN_EID_CHANNEL_SWITCH: 1263 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1264 elem_parse_failed = true; 1265 break; 1266 } 1267 elems->ch_switch_ie = (void *)pos; 1268 break; 1269 case WLAN_EID_EXT_CHANSWITCH_ANN: 1270 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1271 elem_parse_failed = true; 1272 break; 1273 } 1274 elems->ext_chansw_ie = (void *)pos; 1275 break; 1276 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1277 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1278 elem_parse_failed = true; 1279 break; 1280 } 1281 elems->sec_chan_offs = (void *)pos; 1282 break; 1283 case WLAN_EID_CHAN_SWITCH_PARAM: 1284 if (elen < 1285 sizeof(*elems->mesh_chansw_params_ie)) { 1286 elem_parse_failed = true; 1287 break; 1288 } 1289 elems->mesh_chansw_params_ie = (void *)pos; 1290 break; 1291 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1292 if (!params->action || 1293 elen < sizeof(*elems->wide_bw_chansw_ie)) { 1294 elem_parse_failed = true; 1295 break; 1296 } 1297 elems->wide_bw_chansw_ie = (void *)pos; 1298 break; 1299 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1300 if (params->action) { 1301 elem_parse_failed = true; 1302 break; 1303 } 1304 /* 1305 * This is a bit tricky, but as we only care about 1306 * the wide bandwidth channel switch element, so 1307 * just parse it out manually. 1308 */ 1309 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1310 pos, elen); 1311 if (ie) { 1312 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie)) 1313 elems->wide_bw_chansw_ie = 1314 (void *)(ie + 2); 1315 else 1316 elem_parse_failed = true; 1317 } 1318 break; 1319 case WLAN_EID_COUNTRY: 1320 elems->country_elem = pos; 1321 elems->country_elem_len = elen; 1322 break; 1323 case WLAN_EID_PWR_CONSTRAINT: 1324 if (elen != 1) { 1325 elem_parse_failed = true; 1326 break; 1327 } 1328 elems->pwr_constr_elem = pos; 1329 break; 1330 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1331 /* Lots of different options exist, but we only care 1332 * about the Dynamic Transmit Power Control element. 1333 * First check for the Cisco OUI, then for the DTPC 1334 * tag (0x00). 1335 */ 1336 if (elen < 4) { 1337 elem_parse_failed = true; 1338 break; 1339 } 1340 1341 if (pos[0] != 0x00 || pos[1] != 0x40 || 1342 pos[2] != 0x96 || pos[3] != 0x00) 1343 break; 1344 1345 if (elen != 6) { 1346 elem_parse_failed = true; 1347 break; 1348 } 1349 1350 if (calc_crc) 1351 crc = crc32_be(crc, pos - 2, elen + 2); 1352 1353 elems->cisco_dtpc_elem = pos; 1354 break; 1355 case WLAN_EID_ADDBA_EXT: 1356 if (elen < sizeof(struct ieee80211_addba_ext_ie)) { 1357 elem_parse_failed = true; 1358 break; 1359 } 1360 elems->addba_ext_ie = (void *)pos; 1361 break; 1362 case WLAN_EID_TIMEOUT_INTERVAL: 1363 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1364 elems->timeout_int = (void *)pos; 1365 else 1366 elem_parse_failed = true; 1367 break; 1368 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1369 if (elen >= sizeof(*elems->max_idle_period_ie)) 1370 elems->max_idle_period_ie = (void *)pos; 1371 break; 1372 case WLAN_EID_RSNX: 1373 elems->rsnx = pos; 1374 elems->rsnx_len = elen; 1375 break; 1376 case WLAN_EID_TX_POWER_ENVELOPE: 1377 if (elen < 1 || 1378 elen > sizeof(struct ieee80211_tx_pwr_env)) 1379 break; 1380 1381 if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env)) 1382 break; 1383 1384 elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos; 1385 elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen; 1386 elems->tx_pwr_env_num++; 1387 break; 1388 case WLAN_EID_EXTENSION: 1389 ieee80211_parse_extension_element(calc_crc ? 1390 &crc : NULL, 1391 elem, elems, params); 1392 break; 1393 case WLAN_EID_S1G_CAPABILITIES: 1394 if (elen >= sizeof(*elems->s1g_capab)) 1395 elems->s1g_capab = (void *)pos; 1396 else 1397 elem_parse_failed = true; 1398 break; 1399 case WLAN_EID_S1G_OPERATION: 1400 if (elen == sizeof(*elems->s1g_oper)) 1401 elems->s1g_oper = (void *)pos; 1402 else 1403 elem_parse_failed = true; 1404 break; 1405 case WLAN_EID_S1G_BCN_COMPAT: 1406 if (elen == sizeof(*elems->s1g_bcn_compat)) 1407 elems->s1g_bcn_compat = (void *)pos; 1408 else 1409 elem_parse_failed = true; 1410 break; 1411 case WLAN_EID_AID_RESPONSE: 1412 if (elen == sizeof(struct ieee80211_aid_response_ie)) 1413 elems->aid_resp = (void *)pos; 1414 else 1415 elem_parse_failed = true; 1416 break; 1417 default: 1418 break; 1419 } 1420 1421 if (elem_parse_failed) 1422 elems->parse_error = true; 1423 else 1424 __set_bit(id, seen_elems); 1425 } 1426 1427 if (!for_each_element_completed(elem, params->start, params->len)) 1428 elems->parse_error = true; 1429 1430 return crc; 1431 } 1432 1433 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1434 struct ieee802_11_elems *elems, 1435 struct cfg80211_bss *bss, 1436 u8 *nontransmitted_profile) 1437 { 1438 const struct element *elem, *sub; 1439 size_t profile_len = 0; 1440 bool found = false; 1441 1442 if (!bss || !bss->transmitted_bss) 1443 return profile_len; 1444 1445 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1446 if (elem->datalen < 2) 1447 continue; 1448 if (elem->data[0] < 1 || elem->data[0] > 8) 1449 continue; 1450 1451 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1452 u8 new_bssid[ETH_ALEN]; 1453 const u8 *index; 1454 1455 if (sub->id != 0 || sub->datalen < 4) { 1456 /* not a valid BSS profile */ 1457 continue; 1458 } 1459 1460 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1461 sub->data[1] != 2) { 1462 /* The first element of the 1463 * Nontransmitted BSSID Profile is not 1464 * the Nontransmitted BSSID Capability 1465 * element. 1466 */ 1467 continue; 1468 } 1469 1470 memset(nontransmitted_profile, 0, len); 1471 profile_len = cfg80211_merge_profile(start, len, 1472 elem, 1473 sub, 1474 nontransmitted_profile, 1475 len); 1476 1477 /* found a Nontransmitted BSSID Profile */ 1478 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1479 nontransmitted_profile, 1480 profile_len); 1481 if (!index || index[1] < 1 || index[2] == 0) { 1482 /* Invalid MBSSID Index element */ 1483 continue; 1484 } 1485 1486 cfg80211_gen_new_bssid(bss->transmitted_bss->bssid, 1487 elem->data[0], 1488 index[2], 1489 new_bssid); 1490 if (ether_addr_equal(new_bssid, bss->bssid)) { 1491 found = true; 1492 elems->bssid_index_len = index[1]; 1493 elems->bssid_index = (void *)&index[2]; 1494 break; 1495 } 1496 } 1497 } 1498 1499 return found ? profile_len : 0; 1500 } 1501 1502 struct ieee802_11_elems * 1503 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params) 1504 { 1505 struct ieee802_11_elems *elems; 1506 const struct element *non_inherit = NULL; 1507 u8 *nontransmitted_profile; 1508 int nontransmitted_profile_len = 0; 1509 size_t scratch_len = params->len; 1510 1511 elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC); 1512 if (!elems) 1513 return NULL; 1514 elems->ie_start = params->start; 1515 elems->total_len = params->len; 1516 elems->scratch_len = scratch_len; 1517 elems->scratch_pos = elems->scratch; 1518 1519 nontransmitted_profile = elems->scratch_pos; 1520 nontransmitted_profile_len = 1521 ieee802_11_find_bssid_profile(params->start, params->len, 1522 elems, params->bss, 1523 nontransmitted_profile); 1524 elems->scratch_pos += nontransmitted_profile_len; 1525 elems->scratch_len -= nontransmitted_profile_len; 1526 non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1527 nontransmitted_profile, 1528 nontransmitted_profile_len); 1529 1530 elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit); 1531 1532 /* Override with nontransmitted profile, if found */ 1533 if (nontransmitted_profile_len) { 1534 struct ieee80211_elems_parse_params sub = { 1535 .start = nontransmitted_profile, 1536 .len = nontransmitted_profile_len, 1537 .action = params->action, 1538 .link_id = params->link_id, 1539 }; 1540 1541 _ieee802_11_parse_elems_full(&sub, elems, NULL); 1542 } 1543 1544 if (elems->tim && !elems->parse_error) { 1545 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1546 1547 elems->dtim_period = tim_ie->dtim_period; 1548 elems->dtim_count = tim_ie->dtim_count; 1549 } 1550 1551 /* Override DTIM period and count if needed */ 1552 if (elems->bssid_index && 1553 elems->bssid_index_len >= 1554 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1555 elems->dtim_period = elems->bssid_index->dtim_period; 1556 1557 if (elems->bssid_index && 1558 elems->bssid_index_len >= 1559 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1560 elems->dtim_count = elems->bssid_index->dtim_count; 1561 1562 return elems; 1563 } 1564 1565 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1566 struct ieee80211_tx_queue_params 1567 *qparam, int ac) 1568 { 1569 struct ieee80211_chanctx_conf *chanctx_conf; 1570 const struct ieee80211_reg_rule *rrule; 1571 const struct ieee80211_wmm_ac *wmm_ac; 1572 u16 center_freq = 0; 1573 1574 if (sdata->vif.type != NL80211_IFTYPE_AP && 1575 sdata->vif.type != NL80211_IFTYPE_STATION) 1576 return; 1577 1578 rcu_read_lock(); 1579 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1580 if (chanctx_conf) 1581 center_freq = chanctx_conf->def.chan->center_freq; 1582 1583 if (!center_freq) { 1584 rcu_read_unlock(); 1585 return; 1586 } 1587 1588 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1589 1590 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1591 rcu_read_unlock(); 1592 return; 1593 } 1594 1595 if (sdata->vif.type == NL80211_IFTYPE_AP) 1596 wmm_ac = &rrule->wmm_rule.ap[ac]; 1597 else 1598 wmm_ac = &rrule->wmm_rule.client[ac]; 1599 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1600 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1601 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1602 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1603 rcu_read_unlock(); 1604 } 1605 1606 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1607 bool bss_notify, bool enable_qos) 1608 { 1609 struct ieee80211_sub_if_data *sdata = link->sdata; 1610 struct ieee80211_local *local = sdata->local; 1611 struct ieee80211_tx_queue_params qparam; 1612 struct ieee80211_chanctx_conf *chanctx_conf; 1613 int ac; 1614 bool use_11b; 1615 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1616 int aCWmin, aCWmax; 1617 1618 if (!local->ops->conf_tx) 1619 return; 1620 1621 if (local->hw.queues < IEEE80211_NUM_ACS) 1622 return; 1623 1624 memset(&qparam, 0, sizeof(qparam)); 1625 1626 rcu_read_lock(); 1627 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1628 use_11b = (chanctx_conf && 1629 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1630 !link->operating_11g_mode; 1631 rcu_read_unlock(); 1632 1633 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1634 1635 /* Set defaults according to 802.11-2007 Table 7-37 */ 1636 aCWmax = 1023; 1637 if (use_11b) 1638 aCWmin = 31; 1639 else 1640 aCWmin = 15; 1641 1642 /* Confiure old 802.11b/g medium access rules. */ 1643 qparam.cw_max = aCWmax; 1644 qparam.cw_min = aCWmin; 1645 qparam.txop = 0; 1646 qparam.aifs = 2; 1647 1648 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1649 /* Update if QoS is enabled. */ 1650 if (enable_qos) { 1651 switch (ac) { 1652 case IEEE80211_AC_BK: 1653 qparam.cw_max = aCWmax; 1654 qparam.cw_min = aCWmin; 1655 qparam.txop = 0; 1656 if (is_ocb) 1657 qparam.aifs = 9; 1658 else 1659 qparam.aifs = 7; 1660 break; 1661 /* never happens but let's not leave undefined */ 1662 default: 1663 case IEEE80211_AC_BE: 1664 qparam.cw_max = aCWmax; 1665 qparam.cw_min = aCWmin; 1666 qparam.txop = 0; 1667 if (is_ocb) 1668 qparam.aifs = 6; 1669 else 1670 qparam.aifs = 3; 1671 break; 1672 case IEEE80211_AC_VI: 1673 qparam.cw_max = aCWmin; 1674 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1675 if (is_ocb) 1676 qparam.txop = 0; 1677 else if (use_11b) 1678 qparam.txop = 6016/32; 1679 else 1680 qparam.txop = 3008/32; 1681 1682 if (is_ocb) 1683 qparam.aifs = 3; 1684 else 1685 qparam.aifs = 2; 1686 break; 1687 case IEEE80211_AC_VO: 1688 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1689 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1690 if (is_ocb) 1691 qparam.txop = 0; 1692 else if (use_11b) 1693 qparam.txop = 3264/32; 1694 else 1695 qparam.txop = 1504/32; 1696 qparam.aifs = 2; 1697 break; 1698 } 1699 } 1700 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1701 1702 qparam.uapsd = false; 1703 1704 link->tx_conf[ac] = qparam; 1705 drv_conf_tx(local, link, ac, &qparam); 1706 } 1707 1708 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1709 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1710 sdata->vif.type != NL80211_IFTYPE_NAN) { 1711 link->conf->qos = enable_qos; 1712 if (bss_notify) 1713 ieee80211_link_info_change_notify(sdata, link, 1714 BSS_CHANGED_QOS); 1715 } 1716 } 1717 1718 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1719 u16 transaction, u16 auth_alg, u16 status, 1720 const u8 *extra, size_t extra_len, const u8 *da, 1721 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1722 u32 tx_flags) 1723 { 1724 struct ieee80211_local *local = sdata->local; 1725 struct sk_buff *skb; 1726 struct ieee80211_mgmt *mgmt; 1727 bool multi_link = sdata->vif.valid_links; 1728 struct { 1729 u8 id; 1730 u8 len; 1731 u8 ext_id; 1732 struct ieee80211_multi_link_elem ml; 1733 struct ieee80211_mle_basic_common_info basic; 1734 } __packed mle = { 1735 .id = WLAN_EID_EXTENSION, 1736 .len = sizeof(mle) - 2, 1737 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1738 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1739 .basic.len = sizeof(mle.basic), 1740 }; 1741 int err; 1742 1743 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1744 1745 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1746 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1747 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1748 multi_link * sizeof(mle)); 1749 if (!skb) 1750 return; 1751 1752 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1753 1754 mgmt = skb_put_zero(skb, 24 + 6); 1755 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1756 IEEE80211_STYPE_AUTH); 1757 memcpy(mgmt->da, da, ETH_ALEN); 1758 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1759 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1760 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1761 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1762 mgmt->u.auth.status_code = cpu_to_le16(status); 1763 if (extra) 1764 skb_put_data(skb, extra, extra_len); 1765 if (multi_link) 1766 skb_put_data(skb, &mle, sizeof(mle)); 1767 1768 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1769 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1770 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1771 if (WARN_ON(err)) { 1772 kfree_skb(skb); 1773 return; 1774 } 1775 } 1776 1777 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1778 tx_flags; 1779 ieee80211_tx_skb(sdata, skb); 1780 } 1781 1782 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1783 const u8 *da, const u8 *bssid, 1784 u16 stype, u16 reason, 1785 bool send_frame, u8 *frame_buf) 1786 { 1787 struct ieee80211_local *local = sdata->local; 1788 struct sk_buff *skb; 1789 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1790 1791 /* build frame */ 1792 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1793 mgmt->duration = 0; /* initialize only */ 1794 mgmt->seq_ctrl = 0; /* initialize only */ 1795 memcpy(mgmt->da, da, ETH_ALEN); 1796 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1797 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1798 /* u.deauth.reason_code == u.disassoc.reason_code */ 1799 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1800 1801 if (send_frame) { 1802 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1803 IEEE80211_DEAUTH_FRAME_LEN); 1804 if (!skb) 1805 return; 1806 1807 skb_reserve(skb, local->hw.extra_tx_headroom); 1808 1809 /* copy in frame */ 1810 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1811 1812 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1813 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1814 IEEE80211_SKB_CB(skb)->flags |= 1815 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1816 1817 ieee80211_tx_skb(sdata, skb); 1818 } 1819 } 1820 1821 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end) 1822 { 1823 if ((end - pos) < 5) 1824 return pos; 1825 1826 *pos++ = WLAN_EID_EXTENSION; 1827 *pos++ = 1 + sizeof(cap); 1828 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA; 1829 memcpy(pos, &cap, sizeof(cap)); 1830 1831 return pos + 2; 1832 } 1833 1834 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata, 1835 u8 *buffer, size_t buffer_len, 1836 const u8 *ie, size_t ie_len, 1837 enum nl80211_band band, 1838 u32 rate_mask, 1839 struct cfg80211_chan_def *chandef, 1840 size_t *offset, u32 flags) 1841 { 1842 struct ieee80211_local *local = sdata->local; 1843 struct ieee80211_supported_band *sband; 1844 const struct ieee80211_sta_he_cap *he_cap; 1845 const struct ieee80211_sta_eht_cap *eht_cap; 1846 u8 *pos = buffer, *end = buffer + buffer_len; 1847 size_t noffset; 1848 int supp_rates_len, i; 1849 u8 rates[32]; 1850 int num_rates; 1851 int ext_rates_len; 1852 int shift; 1853 u32 rate_flags; 1854 bool have_80mhz = false; 1855 1856 *offset = 0; 1857 1858 sband = local->hw.wiphy->bands[band]; 1859 if (WARN_ON_ONCE(!sband)) 1860 return 0; 1861 1862 rate_flags = ieee80211_chandef_rate_flags(chandef); 1863 shift = ieee80211_chandef_get_shift(chandef); 1864 1865 num_rates = 0; 1866 for (i = 0; i < sband->n_bitrates; i++) { 1867 if ((BIT(i) & rate_mask) == 0) 1868 continue; /* skip rate */ 1869 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1870 continue; 1871 1872 rates[num_rates++] = 1873 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1874 (1 << shift) * 5); 1875 } 1876 1877 supp_rates_len = min_t(int, num_rates, 8); 1878 1879 if (end - pos < 2 + supp_rates_len) 1880 goto out_err; 1881 *pos++ = WLAN_EID_SUPP_RATES; 1882 *pos++ = supp_rates_len; 1883 memcpy(pos, rates, supp_rates_len); 1884 pos += supp_rates_len; 1885 1886 /* insert "request information" if in custom IEs */ 1887 if (ie && ie_len) { 1888 static const u8 before_extrates[] = { 1889 WLAN_EID_SSID, 1890 WLAN_EID_SUPP_RATES, 1891 WLAN_EID_REQUEST, 1892 }; 1893 noffset = ieee80211_ie_split(ie, ie_len, 1894 before_extrates, 1895 ARRAY_SIZE(before_extrates), 1896 *offset); 1897 if (end - pos < noffset - *offset) 1898 goto out_err; 1899 memcpy(pos, ie + *offset, noffset - *offset); 1900 pos += noffset - *offset; 1901 *offset = noffset; 1902 } 1903 1904 ext_rates_len = num_rates - supp_rates_len; 1905 if (ext_rates_len > 0) { 1906 if (end - pos < 2 + ext_rates_len) 1907 goto out_err; 1908 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1909 *pos++ = ext_rates_len; 1910 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1911 pos += ext_rates_len; 1912 } 1913 1914 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1915 if (end - pos < 3) 1916 goto out_err; 1917 *pos++ = WLAN_EID_DS_PARAMS; 1918 *pos++ = 1; 1919 *pos++ = ieee80211_frequency_to_channel( 1920 chandef->chan->center_freq); 1921 } 1922 1923 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1924 goto done; 1925 1926 /* insert custom IEs that go before HT */ 1927 if (ie && ie_len) { 1928 static const u8 before_ht[] = { 1929 /* 1930 * no need to list the ones split off already 1931 * (or generated here) 1932 */ 1933 WLAN_EID_DS_PARAMS, 1934 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1935 }; 1936 noffset = ieee80211_ie_split(ie, ie_len, 1937 before_ht, ARRAY_SIZE(before_ht), 1938 *offset); 1939 if (end - pos < noffset - *offset) 1940 goto out_err; 1941 memcpy(pos, ie + *offset, noffset - *offset); 1942 pos += noffset - *offset; 1943 *offset = noffset; 1944 } 1945 1946 if (sband->ht_cap.ht_supported) { 1947 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1948 goto out_err; 1949 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1950 sband->ht_cap.cap); 1951 } 1952 1953 /* insert custom IEs that go before VHT */ 1954 if (ie && ie_len) { 1955 static const u8 before_vht[] = { 1956 /* 1957 * no need to list the ones split off already 1958 * (or generated here) 1959 */ 1960 WLAN_EID_BSS_COEX_2040, 1961 WLAN_EID_EXT_CAPABILITY, 1962 WLAN_EID_SSID_LIST, 1963 WLAN_EID_CHANNEL_USAGE, 1964 WLAN_EID_INTERWORKING, 1965 WLAN_EID_MESH_ID, 1966 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1967 }; 1968 noffset = ieee80211_ie_split(ie, ie_len, 1969 before_vht, ARRAY_SIZE(before_vht), 1970 *offset); 1971 if (end - pos < noffset - *offset) 1972 goto out_err; 1973 memcpy(pos, ie + *offset, noffset - *offset); 1974 pos += noffset - *offset; 1975 *offset = noffset; 1976 } 1977 1978 /* Check if any channel in this sband supports at least 80 MHz */ 1979 for (i = 0; i < sband->n_channels; i++) { 1980 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1981 IEEE80211_CHAN_NO_80MHZ)) 1982 continue; 1983 1984 have_80mhz = true; 1985 break; 1986 } 1987 1988 if (sband->vht_cap.vht_supported && have_80mhz) { 1989 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1990 goto out_err; 1991 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1992 sband->vht_cap.cap); 1993 } 1994 1995 /* insert custom IEs that go before HE */ 1996 if (ie && ie_len) { 1997 static const u8 before_he[] = { 1998 /* 1999 * no need to list the ones split off before VHT 2000 * or generated here 2001 */ 2002 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 2003 WLAN_EID_AP_CSN, 2004 /* TODO: add 11ah/11aj/11ak elements */ 2005 }; 2006 noffset = ieee80211_ie_split(ie, ie_len, 2007 before_he, ARRAY_SIZE(before_he), 2008 *offset); 2009 if (end - pos < noffset - *offset) 2010 goto out_err; 2011 memcpy(pos, ie + *offset, noffset - *offset); 2012 pos += noffset - *offset; 2013 *offset = noffset; 2014 } 2015 2016 he_cap = ieee80211_get_he_iftype_cap(sband, 2017 ieee80211_vif_type_p2p(&sdata->vif)); 2018 if (he_cap && 2019 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2020 IEEE80211_CHAN_NO_HE)) { 2021 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end); 2022 if (!pos) 2023 goto out_err; 2024 } 2025 2026 eht_cap = ieee80211_get_eht_iftype_cap(sband, 2027 ieee80211_vif_type_p2p(&sdata->vif)); 2028 2029 if (eht_cap && 2030 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2031 IEEE80211_CHAN_NO_HE | 2032 IEEE80211_CHAN_NO_EHT)) { 2033 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end, 2034 sdata->vif.type == NL80211_IFTYPE_AP); 2035 if (!pos) 2036 goto out_err; 2037 } 2038 2039 if (cfg80211_any_usable_channels(local->hw.wiphy, 2040 BIT(NL80211_BAND_6GHZ), 2041 IEEE80211_CHAN_NO_HE)) { 2042 struct ieee80211_supported_band *sband6; 2043 2044 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2045 he_cap = ieee80211_get_he_iftype_cap(sband6, 2046 ieee80211_vif_type_p2p(&sdata->vif)); 2047 2048 if (he_cap) { 2049 enum nl80211_iftype iftype = 2050 ieee80211_vif_type_p2p(&sdata->vif); 2051 __le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype); 2052 2053 pos = ieee80211_write_he_6ghz_cap(pos, cap, end); 2054 } 2055 } 2056 2057 /* 2058 * If adding more here, adjust code in main.c 2059 * that calculates local->scan_ies_len. 2060 */ 2061 2062 return pos - buffer; 2063 out_err: 2064 WARN_ONCE(1, "not enough space for preq IEs\n"); 2065 done: 2066 return pos - buffer; 2067 } 2068 2069 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 2070 size_t buffer_len, 2071 struct ieee80211_scan_ies *ie_desc, 2072 const u8 *ie, size_t ie_len, 2073 u8 bands_used, u32 *rate_masks, 2074 struct cfg80211_chan_def *chandef, 2075 u32 flags) 2076 { 2077 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 2078 int i; 2079 2080 memset(ie_desc, 0, sizeof(*ie_desc)); 2081 2082 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2083 if (bands_used & BIT(i)) { 2084 pos += ieee80211_build_preq_ies_band(sdata, 2085 buffer + pos, 2086 buffer_len - pos, 2087 ie, ie_len, i, 2088 rate_masks[i], 2089 chandef, 2090 &custom_ie_offset, 2091 flags); 2092 ie_desc->ies[i] = buffer + old_pos; 2093 ie_desc->len[i] = pos - old_pos; 2094 old_pos = pos; 2095 } 2096 } 2097 2098 /* add any remaining custom IEs */ 2099 if (ie && ie_len) { 2100 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 2101 "not enough space for preq custom IEs\n")) 2102 return pos; 2103 memcpy(buffer + pos, ie + custom_ie_offset, 2104 ie_len - custom_ie_offset); 2105 ie_desc->common_ies = buffer + pos; 2106 ie_desc->common_ie_len = ie_len - custom_ie_offset; 2107 pos += ie_len - custom_ie_offset; 2108 } 2109 2110 return pos; 2111 }; 2112 2113 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 2114 const u8 *src, const u8 *dst, 2115 u32 ratemask, 2116 struct ieee80211_channel *chan, 2117 const u8 *ssid, size_t ssid_len, 2118 const u8 *ie, size_t ie_len, 2119 u32 flags) 2120 { 2121 struct ieee80211_local *local = sdata->local; 2122 struct cfg80211_chan_def chandef; 2123 struct sk_buff *skb; 2124 struct ieee80211_mgmt *mgmt; 2125 int ies_len; 2126 u32 rate_masks[NUM_NL80211_BANDS] = {}; 2127 struct ieee80211_scan_ies dummy_ie_desc; 2128 2129 /* 2130 * Do not send DS Channel parameter for directed probe requests 2131 * in order to maximize the chance that we get a response. Some 2132 * badly-behaved APs don't respond when this parameter is included. 2133 */ 2134 chandef.width = sdata->vif.bss_conf.chandef.width; 2135 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 2136 chandef.chan = NULL; 2137 else 2138 chandef.chan = chan; 2139 2140 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 2141 local->scan_ies_len + ie_len); 2142 if (!skb) 2143 return NULL; 2144 2145 rate_masks[chan->band] = ratemask; 2146 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb), 2147 skb_tailroom(skb), &dummy_ie_desc, 2148 ie, ie_len, BIT(chan->band), 2149 rate_masks, &chandef, flags); 2150 skb_put(skb, ies_len); 2151 2152 if (dst) { 2153 mgmt = (struct ieee80211_mgmt *) skb->data; 2154 memcpy(mgmt->da, dst, ETH_ALEN); 2155 memcpy(mgmt->bssid, dst, ETH_ALEN); 2156 } 2157 2158 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2159 2160 return skb; 2161 } 2162 2163 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 2164 struct ieee802_11_elems *elems, 2165 enum nl80211_band band, u32 *basic_rates) 2166 { 2167 struct ieee80211_supported_band *sband; 2168 size_t num_rates; 2169 u32 supp_rates, rate_flags; 2170 int i, j, shift; 2171 2172 sband = sdata->local->hw.wiphy->bands[band]; 2173 if (WARN_ON(!sband)) 2174 return 1; 2175 2176 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2177 shift = ieee80211_vif_get_shift(&sdata->vif); 2178 2179 num_rates = sband->n_bitrates; 2180 supp_rates = 0; 2181 for (i = 0; i < elems->supp_rates_len + 2182 elems->ext_supp_rates_len; i++) { 2183 u8 rate = 0; 2184 int own_rate; 2185 bool is_basic; 2186 if (i < elems->supp_rates_len) 2187 rate = elems->supp_rates[i]; 2188 else if (elems->ext_supp_rates) 2189 rate = elems->ext_supp_rates 2190 [i - elems->supp_rates_len]; 2191 own_rate = 5 * (rate & 0x7f); 2192 is_basic = !!(rate & 0x80); 2193 2194 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2195 continue; 2196 2197 for (j = 0; j < num_rates; j++) { 2198 int brate; 2199 if ((rate_flags & sband->bitrates[j].flags) 2200 != rate_flags) 2201 continue; 2202 2203 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 2204 1 << shift); 2205 2206 if (brate == own_rate) { 2207 supp_rates |= BIT(j); 2208 if (basic_rates && is_basic) 2209 *basic_rates |= BIT(j); 2210 } 2211 } 2212 } 2213 return supp_rates; 2214 } 2215 2216 void ieee80211_stop_device(struct ieee80211_local *local) 2217 { 2218 ieee80211_led_radio(local, false); 2219 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2220 2221 cancel_work_sync(&local->reconfig_filter); 2222 2223 flush_workqueue(local->workqueue); 2224 drv_stop(local); 2225 } 2226 2227 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2228 bool aborted) 2229 { 2230 /* It's possible that we don't handle the scan completion in 2231 * time during suspend, so if it's still marked as completed 2232 * here, queue the work and flush it to clean things up. 2233 * Instead of calling the worker function directly here, we 2234 * really queue it to avoid potential races with other flows 2235 * scheduling the same work. 2236 */ 2237 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2238 /* If coming from reconfiguration failure, abort the scan so 2239 * we don't attempt to continue a partial HW scan - which is 2240 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2241 * completed scan, and a 5 GHz portion is still pending. 2242 */ 2243 if (aborted) 2244 set_bit(SCAN_ABORTED, &local->scanning); 2245 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2246 flush_delayed_work(&local->scan_work); 2247 } 2248 } 2249 2250 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2251 { 2252 struct ieee80211_sub_if_data *sdata; 2253 struct ieee80211_chanctx *ctx; 2254 2255 /* 2256 * We get here if during resume the device can't be restarted properly. 2257 * We might also get here if this happens during HW reset, which is a 2258 * slightly different situation and we need to drop all connections in 2259 * the latter case. 2260 * 2261 * Ask cfg80211 to turn off all interfaces, this will result in more 2262 * warnings but at least we'll then get into a clean stopped state. 2263 */ 2264 2265 local->resuming = false; 2266 local->suspended = false; 2267 local->in_reconfig = false; 2268 2269 ieee80211_flush_completed_scan(local, true); 2270 2271 /* scheduled scan clearly can't be running any more, but tell 2272 * cfg80211 and clear local state 2273 */ 2274 ieee80211_sched_scan_end(local); 2275 2276 list_for_each_entry(sdata, &local->interfaces, list) 2277 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2278 2279 /* Mark channel contexts as not being in the driver any more to avoid 2280 * removing them from the driver during the shutdown process... 2281 */ 2282 mutex_lock(&local->chanctx_mtx); 2283 list_for_each_entry(ctx, &local->chanctx_list, list) 2284 ctx->driver_present = false; 2285 mutex_unlock(&local->chanctx_mtx); 2286 } 2287 2288 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2289 struct ieee80211_sub_if_data *sdata, 2290 struct ieee80211_link_data *link) 2291 { 2292 struct ieee80211_chanctx_conf *conf; 2293 struct ieee80211_chanctx *ctx; 2294 2295 if (!local->use_chanctx) 2296 return; 2297 2298 mutex_lock(&local->chanctx_mtx); 2299 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2300 lockdep_is_held(&local->chanctx_mtx)); 2301 if (conf) { 2302 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2303 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 2304 } 2305 mutex_unlock(&local->chanctx_mtx); 2306 } 2307 2308 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2309 { 2310 struct ieee80211_local *local = sdata->local; 2311 struct sta_info *sta; 2312 2313 /* add STAs back */ 2314 mutex_lock(&local->sta_mtx); 2315 list_for_each_entry(sta, &local->sta_list, list) { 2316 enum ieee80211_sta_state state; 2317 2318 if (!sta->uploaded || sta->sdata != sdata) 2319 continue; 2320 2321 for (state = IEEE80211_STA_NOTEXIST; 2322 state < sta->sta_state; state++) 2323 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2324 state + 1)); 2325 } 2326 mutex_unlock(&local->sta_mtx); 2327 } 2328 2329 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2330 { 2331 struct cfg80211_nan_func *func, **funcs; 2332 int res, id, i = 0; 2333 2334 res = drv_start_nan(sdata->local, sdata, 2335 &sdata->u.nan.conf); 2336 if (WARN_ON(res)) 2337 return res; 2338 2339 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2340 sizeof(*funcs), 2341 GFP_KERNEL); 2342 if (!funcs) 2343 return -ENOMEM; 2344 2345 /* Add all the functions: 2346 * This is a little bit ugly. We need to call a potentially sleeping 2347 * callback for each NAN function, so we can't hold the spinlock. 2348 */ 2349 spin_lock_bh(&sdata->u.nan.func_lock); 2350 2351 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2352 funcs[i++] = func; 2353 2354 spin_unlock_bh(&sdata->u.nan.func_lock); 2355 2356 for (i = 0; funcs[i]; i++) { 2357 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2358 if (WARN_ON(res)) 2359 ieee80211_nan_func_terminated(&sdata->vif, 2360 funcs[i]->instance_id, 2361 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2362 GFP_KERNEL); 2363 } 2364 2365 kfree(funcs); 2366 2367 return 0; 2368 } 2369 2370 int ieee80211_reconfig(struct ieee80211_local *local) 2371 { 2372 struct ieee80211_hw *hw = &local->hw; 2373 struct ieee80211_sub_if_data *sdata; 2374 struct ieee80211_chanctx *ctx; 2375 struct sta_info *sta; 2376 int res, i; 2377 bool reconfig_due_to_wowlan = false; 2378 struct ieee80211_sub_if_data *sched_scan_sdata; 2379 struct cfg80211_sched_scan_request *sched_scan_req; 2380 bool sched_scan_stopped = false; 2381 bool suspended = local->suspended; 2382 bool in_reconfig = false; 2383 2384 /* nothing to do if HW shouldn't run */ 2385 if (!local->open_count) 2386 goto wake_up; 2387 2388 #ifdef CONFIG_PM 2389 if (suspended) 2390 local->resuming = true; 2391 2392 if (local->wowlan) { 2393 /* 2394 * In the wowlan case, both mac80211 and the device 2395 * are functional when the resume op is called, so 2396 * clear local->suspended so the device could operate 2397 * normally (e.g. pass rx frames). 2398 */ 2399 local->suspended = false; 2400 res = drv_resume(local); 2401 local->wowlan = false; 2402 if (res < 0) { 2403 local->resuming = false; 2404 return res; 2405 } 2406 if (res == 0) 2407 goto wake_up; 2408 WARN_ON(res > 1); 2409 /* 2410 * res is 1, which means the driver requested 2411 * to go through a regular reset on wakeup. 2412 * restore local->suspended in this case. 2413 */ 2414 reconfig_due_to_wowlan = true; 2415 local->suspended = true; 2416 } 2417 #endif 2418 2419 /* 2420 * In case of hw_restart during suspend (without wowlan), 2421 * cancel restart work, as we are reconfiguring the device 2422 * anyway. 2423 * Note that restart_work is scheduled on a frozen workqueue, 2424 * so we can't deadlock in this case. 2425 */ 2426 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2427 cancel_work_sync(&local->restart_work); 2428 2429 local->started = false; 2430 2431 /* 2432 * Upon resume hardware can sometimes be goofy due to 2433 * various platform / driver / bus issues, so restarting 2434 * the device may at times not work immediately. Propagate 2435 * the error. 2436 */ 2437 res = drv_start(local); 2438 if (res) { 2439 if (suspended) 2440 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2441 else 2442 WARN(1, "Hardware became unavailable during restart.\n"); 2443 ieee80211_handle_reconfig_failure(local); 2444 return res; 2445 } 2446 2447 /* setup fragmentation threshold */ 2448 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2449 2450 /* setup RTS threshold */ 2451 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2452 2453 /* reset coverage class */ 2454 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2455 2456 ieee80211_led_radio(local, true); 2457 ieee80211_mod_tpt_led_trig(local, 2458 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2459 2460 /* add interfaces */ 2461 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2462 if (sdata) { 2463 /* in HW restart it exists already */ 2464 WARN_ON(local->resuming); 2465 res = drv_add_interface(local, sdata); 2466 if (WARN_ON(res)) { 2467 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2468 synchronize_net(); 2469 kfree(sdata); 2470 } 2471 } 2472 2473 list_for_each_entry(sdata, &local->interfaces, list) { 2474 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2475 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2476 ieee80211_sdata_running(sdata)) { 2477 res = drv_add_interface(local, sdata); 2478 if (WARN_ON(res)) 2479 break; 2480 } 2481 } 2482 2483 /* If adding any of the interfaces failed above, roll back and 2484 * report failure. 2485 */ 2486 if (res) { 2487 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2488 list) 2489 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2490 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2491 ieee80211_sdata_running(sdata)) 2492 drv_remove_interface(local, sdata); 2493 ieee80211_handle_reconfig_failure(local); 2494 return res; 2495 } 2496 2497 /* add channel contexts */ 2498 if (local->use_chanctx) { 2499 mutex_lock(&local->chanctx_mtx); 2500 list_for_each_entry(ctx, &local->chanctx_list, list) 2501 if (ctx->replace_state != 2502 IEEE80211_CHANCTX_REPLACES_OTHER) 2503 WARN_ON(drv_add_chanctx(local, ctx)); 2504 mutex_unlock(&local->chanctx_mtx); 2505 2506 sdata = wiphy_dereference(local->hw.wiphy, 2507 local->monitor_sdata); 2508 if (sdata && ieee80211_sdata_running(sdata)) 2509 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2510 } 2511 2512 /* reconfigure hardware */ 2513 ieee80211_hw_config(local, ~0); 2514 2515 ieee80211_configure_filter(local); 2516 2517 /* Finally also reconfigure all the BSS information */ 2518 list_for_each_entry(sdata, &local->interfaces, list) { 2519 unsigned int link_id; 2520 u32 changed; 2521 2522 if (!ieee80211_sdata_running(sdata)) 2523 continue; 2524 2525 sdata_lock(sdata); 2526 for (link_id = 0; 2527 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2528 link_id++) { 2529 struct ieee80211_link_data *link; 2530 2531 link = sdata_dereference(sdata->link[link_id], sdata); 2532 if (link) 2533 ieee80211_assign_chanctx(local, sdata, link); 2534 } 2535 2536 switch (sdata->vif.type) { 2537 case NL80211_IFTYPE_AP_VLAN: 2538 case NL80211_IFTYPE_MONITOR: 2539 break; 2540 case NL80211_IFTYPE_ADHOC: 2541 if (sdata->vif.cfg.ibss_joined) 2542 WARN_ON(drv_join_ibss(local, sdata)); 2543 fallthrough; 2544 default: 2545 ieee80211_reconfig_stations(sdata); 2546 fallthrough; 2547 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2548 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2549 drv_conf_tx(local, &sdata->deflink, i, 2550 &sdata->deflink.tx_conf[i]); 2551 break; 2552 } 2553 sdata_unlock(sdata); 2554 2555 /* common change flags for all interface types */ 2556 changed = BSS_CHANGED_ERP_CTS_PROT | 2557 BSS_CHANGED_ERP_PREAMBLE | 2558 BSS_CHANGED_ERP_SLOT | 2559 BSS_CHANGED_HT | 2560 BSS_CHANGED_BASIC_RATES | 2561 BSS_CHANGED_BEACON_INT | 2562 BSS_CHANGED_BSSID | 2563 BSS_CHANGED_CQM | 2564 BSS_CHANGED_QOS | 2565 BSS_CHANGED_IDLE | 2566 BSS_CHANGED_TXPOWER | 2567 BSS_CHANGED_MCAST_RATE; 2568 2569 if (sdata->vif.bss_conf.mu_mimo_owner) 2570 changed |= BSS_CHANGED_MU_GROUPS; 2571 2572 switch (sdata->vif.type) { 2573 case NL80211_IFTYPE_STATION: 2574 changed |= BSS_CHANGED_ASSOC | 2575 BSS_CHANGED_ARP_FILTER | 2576 BSS_CHANGED_PS; 2577 2578 /* Re-send beacon info report to the driver */ 2579 if (sdata->deflink.u.mgd.have_beacon) 2580 changed |= BSS_CHANGED_BEACON_INFO; 2581 2582 if (sdata->vif.bss_conf.max_idle_period || 2583 sdata->vif.bss_conf.protected_keep_alive) 2584 changed |= BSS_CHANGED_KEEP_ALIVE; 2585 2586 sdata_lock(sdata); 2587 ieee80211_bss_info_change_notify(sdata, changed); 2588 sdata_unlock(sdata); 2589 break; 2590 case NL80211_IFTYPE_OCB: 2591 changed |= BSS_CHANGED_OCB; 2592 ieee80211_bss_info_change_notify(sdata, changed); 2593 break; 2594 case NL80211_IFTYPE_ADHOC: 2595 changed |= BSS_CHANGED_IBSS; 2596 fallthrough; 2597 case NL80211_IFTYPE_AP: 2598 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2599 2600 if (sdata->vif.bss_conf.ftm_responder == 1 && 2601 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2602 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2603 changed |= BSS_CHANGED_FTM_RESPONDER; 2604 2605 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2606 changed |= BSS_CHANGED_AP_PROBE_RESP; 2607 2608 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2609 drv_start_ap(local, sdata, 2610 sdata->deflink.conf); 2611 } 2612 fallthrough; 2613 case NL80211_IFTYPE_MESH_POINT: 2614 if (sdata->vif.bss_conf.enable_beacon) { 2615 changed |= BSS_CHANGED_BEACON | 2616 BSS_CHANGED_BEACON_ENABLED; 2617 ieee80211_bss_info_change_notify(sdata, changed); 2618 } 2619 break; 2620 case NL80211_IFTYPE_NAN: 2621 res = ieee80211_reconfig_nan(sdata); 2622 if (res < 0) { 2623 ieee80211_handle_reconfig_failure(local); 2624 return res; 2625 } 2626 break; 2627 case NL80211_IFTYPE_AP_VLAN: 2628 case NL80211_IFTYPE_MONITOR: 2629 case NL80211_IFTYPE_P2P_DEVICE: 2630 /* nothing to do */ 2631 break; 2632 case NL80211_IFTYPE_UNSPECIFIED: 2633 case NUM_NL80211_IFTYPES: 2634 case NL80211_IFTYPE_P2P_CLIENT: 2635 case NL80211_IFTYPE_P2P_GO: 2636 case NL80211_IFTYPE_WDS: 2637 WARN_ON(1); 2638 break; 2639 } 2640 } 2641 2642 ieee80211_recalc_ps(local); 2643 2644 /* 2645 * The sta might be in psm against the ap (e.g. because 2646 * this was the state before a hw restart), so we 2647 * explicitly send a null packet in order to make sure 2648 * it'll sync against the ap (and get out of psm). 2649 */ 2650 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2651 list_for_each_entry(sdata, &local->interfaces, list) { 2652 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2653 continue; 2654 if (!sdata->u.mgd.associated) 2655 continue; 2656 2657 ieee80211_send_nullfunc(local, sdata, false); 2658 } 2659 } 2660 2661 /* APs are now beaconing, add back stations */ 2662 list_for_each_entry(sdata, &local->interfaces, list) { 2663 if (!ieee80211_sdata_running(sdata)) 2664 continue; 2665 2666 sdata_lock(sdata); 2667 switch (sdata->vif.type) { 2668 case NL80211_IFTYPE_AP_VLAN: 2669 case NL80211_IFTYPE_AP: 2670 ieee80211_reconfig_stations(sdata); 2671 break; 2672 default: 2673 break; 2674 } 2675 sdata_unlock(sdata); 2676 } 2677 2678 /* add back keys */ 2679 list_for_each_entry(sdata, &local->interfaces, list) 2680 ieee80211_reenable_keys(sdata); 2681 2682 /* Reconfigure sched scan if it was interrupted by FW restart */ 2683 mutex_lock(&local->mtx); 2684 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2685 lockdep_is_held(&local->mtx)); 2686 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2687 lockdep_is_held(&local->mtx)); 2688 if (sched_scan_sdata && sched_scan_req) 2689 /* 2690 * Sched scan stopped, but we don't want to report it. Instead, 2691 * we're trying to reschedule. However, if more than one scan 2692 * plan was set, we cannot reschedule since we don't know which 2693 * scan plan was currently running (and some scan plans may have 2694 * already finished). 2695 */ 2696 if (sched_scan_req->n_scan_plans > 1 || 2697 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2698 sched_scan_req)) { 2699 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2700 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2701 sched_scan_stopped = true; 2702 } 2703 mutex_unlock(&local->mtx); 2704 2705 if (sched_scan_stopped) 2706 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2707 2708 wake_up: 2709 2710 if (local->monitors == local->open_count && local->monitors > 0) 2711 ieee80211_add_virtual_monitor(local); 2712 2713 /* 2714 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2715 * sessions can be established after a resume. 2716 * 2717 * Also tear down aggregation sessions since reconfiguring 2718 * them in a hardware restart scenario is not easily done 2719 * right now, and the hardware will have lost information 2720 * about the sessions, but we and the AP still think they 2721 * are active. This is really a workaround though. 2722 */ 2723 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2724 mutex_lock(&local->sta_mtx); 2725 2726 list_for_each_entry(sta, &local->sta_list, list) { 2727 if (!local->resuming) 2728 ieee80211_sta_tear_down_BA_sessions( 2729 sta, AGG_STOP_LOCAL_REQUEST); 2730 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2731 } 2732 2733 mutex_unlock(&local->sta_mtx); 2734 } 2735 2736 /* 2737 * If this is for hw restart things are still running. 2738 * We may want to change that later, however. 2739 */ 2740 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2741 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2742 2743 if (local->in_reconfig) { 2744 in_reconfig = local->in_reconfig; 2745 local->in_reconfig = false; 2746 barrier(); 2747 2748 /* Restart deferred ROCs */ 2749 mutex_lock(&local->mtx); 2750 ieee80211_start_next_roc(local); 2751 mutex_unlock(&local->mtx); 2752 2753 /* Requeue all works */ 2754 list_for_each_entry(sdata, &local->interfaces, list) 2755 ieee80211_queue_work(&local->hw, &sdata->work); 2756 } 2757 2758 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2759 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2760 false); 2761 2762 if (in_reconfig) { 2763 list_for_each_entry(sdata, &local->interfaces, list) { 2764 if (!ieee80211_sdata_running(sdata)) 2765 continue; 2766 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2767 ieee80211_sta_restart(sdata); 2768 } 2769 } 2770 2771 if (!suspended) 2772 return 0; 2773 2774 #ifdef CONFIG_PM 2775 /* first set suspended false, then resuming */ 2776 local->suspended = false; 2777 mb(); 2778 local->resuming = false; 2779 2780 ieee80211_flush_completed_scan(local, false); 2781 2782 if (local->open_count && !reconfig_due_to_wowlan) 2783 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2784 2785 list_for_each_entry(sdata, &local->interfaces, list) { 2786 if (!ieee80211_sdata_running(sdata)) 2787 continue; 2788 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2789 ieee80211_sta_restart(sdata); 2790 } 2791 2792 mod_timer(&local->sta_cleanup, jiffies + 1); 2793 #else 2794 WARN_ON(1); 2795 #endif 2796 2797 return 0; 2798 } 2799 2800 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2801 { 2802 struct ieee80211_sub_if_data *sdata; 2803 struct ieee80211_local *local; 2804 struct ieee80211_key *key; 2805 2806 if (WARN_ON(!vif)) 2807 return; 2808 2809 sdata = vif_to_sdata(vif); 2810 local = sdata->local; 2811 2812 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2813 !local->resuming)) 2814 return; 2815 2816 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2817 !local->in_reconfig)) 2818 return; 2819 2820 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2821 return; 2822 2823 sdata->flags |= flag; 2824 2825 mutex_lock(&local->key_mtx); 2826 list_for_each_entry(key, &sdata->key_list, list) 2827 key->flags |= KEY_FLAG_TAINTED; 2828 mutex_unlock(&local->key_mtx); 2829 } 2830 2831 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2832 { 2833 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2834 } 2835 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2836 2837 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2838 { 2839 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2840 } 2841 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2842 2843 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2844 struct ieee80211_link_data *link) 2845 { 2846 struct ieee80211_local *local = sdata->local; 2847 struct ieee80211_chanctx_conf *chanctx_conf; 2848 struct ieee80211_chanctx *chanctx; 2849 2850 mutex_lock(&local->chanctx_mtx); 2851 2852 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2853 lockdep_is_held(&local->chanctx_mtx)); 2854 2855 /* 2856 * This function can be called from a work, thus it may be possible 2857 * that the chanctx_conf is removed (due to a disconnection, for 2858 * example). 2859 * So nothing should be done in such case. 2860 */ 2861 if (!chanctx_conf) 2862 goto unlock; 2863 2864 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2865 ieee80211_recalc_smps_chanctx(local, chanctx); 2866 unlock: 2867 mutex_unlock(&local->chanctx_mtx); 2868 } 2869 2870 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2871 int link_id) 2872 { 2873 struct ieee80211_local *local = sdata->local; 2874 struct ieee80211_chanctx_conf *chanctx_conf; 2875 struct ieee80211_chanctx *chanctx; 2876 int i; 2877 2878 mutex_lock(&local->chanctx_mtx); 2879 2880 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2881 struct ieee80211_bss_conf *bss_conf; 2882 2883 if (link_id >= 0 && link_id != i) 2884 continue; 2885 2886 rcu_read_lock(); 2887 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2888 if (!bss_conf) { 2889 rcu_read_unlock(); 2890 continue; 2891 } 2892 2893 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2894 lockdep_is_held(&local->chanctx_mtx)); 2895 /* 2896 * Since we hold the chanctx_mtx (checked above) 2897 * we can take the chanctx_conf pointer out of the 2898 * RCU critical section, it cannot go away without 2899 * the mutex. Just the way we reached it could - in 2900 * theory - go away, but we don't really care and 2901 * it really shouldn't happen anyway. 2902 */ 2903 rcu_read_unlock(); 2904 2905 if (!chanctx_conf) 2906 goto unlock; 2907 2908 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2909 conf); 2910 ieee80211_recalc_chanctx_min_def(local, chanctx); 2911 } 2912 unlock: 2913 mutex_unlock(&local->chanctx_mtx); 2914 } 2915 2916 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2917 { 2918 size_t pos = offset; 2919 2920 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2921 pos += 2 + ies[pos + 1]; 2922 2923 return pos; 2924 } 2925 2926 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2927 u16 cap) 2928 { 2929 __le16 tmp; 2930 2931 *pos++ = WLAN_EID_HT_CAPABILITY; 2932 *pos++ = sizeof(struct ieee80211_ht_cap); 2933 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2934 2935 /* capability flags */ 2936 tmp = cpu_to_le16(cap); 2937 memcpy(pos, &tmp, sizeof(u16)); 2938 pos += sizeof(u16); 2939 2940 /* AMPDU parameters */ 2941 *pos++ = ht_cap->ampdu_factor | 2942 (ht_cap->ampdu_density << 2943 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2944 2945 /* MCS set */ 2946 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2947 pos += sizeof(ht_cap->mcs); 2948 2949 /* extended capabilities */ 2950 pos += sizeof(__le16); 2951 2952 /* BF capabilities */ 2953 pos += sizeof(__le32); 2954 2955 /* antenna selection */ 2956 pos += sizeof(u8); 2957 2958 return pos; 2959 } 2960 2961 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2962 u32 cap) 2963 { 2964 __le32 tmp; 2965 2966 *pos++ = WLAN_EID_VHT_CAPABILITY; 2967 *pos++ = sizeof(struct ieee80211_vht_cap); 2968 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2969 2970 /* capability flags */ 2971 tmp = cpu_to_le32(cap); 2972 memcpy(pos, &tmp, sizeof(u32)); 2973 pos += sizeof(u32); 2974 2975 /* VHT MCS set */ 2976 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2977 pos += sizeof(vht_cap->vht_mcs); 2978 2979 return pos; 2980 } 2981 2982 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 2983 { 2984 const struct ieee80211_sta_he_cap *he_cap; 2985 struct ieee80211_supported_band *sband; 2986 u8 n; 2987 2988 sband = ieee80211_get_sband(sdata); 2989 if (!sband) 2990 return 0; 2991 2992 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 2993 if (!he_cap) 2994 return 0; 2995 2996 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2997 return 2 + 1 + 2998 sizeof(he_cap->he_cap_elem) + n + 2999 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3000 he_cap->he_cap_elem.phy_cap_info); 3001 } 3002 3003 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos, 3004 const struct ieee80211_sta_he_cap *he_cap, 3005 u8 *end) 3006 { 3007 struct ieee80211_he_cap_elem elem; 3008 u8 n; 3009 u8 ie_len; 3010 u8 *orig_pos = pos; 3011 3012 /* Make sure we have place for the IE */ 3013 /* 3014 * TODO: the 1 added is because this temporarily is under the EXTENSION 3015 * IE. Get rid of it when it moves. 3016 */ 3017 if (!he_cap) 3018 return orig_pos; 3019 3020 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 3021 elem = he_cap->he_cap_elem; 3022 3023 if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ) 3024 elem.phy_cap_info[0] &= 3025 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 3026 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 3027 3028 if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ) 3029 elem.phy_cap_info[0] &= 3030 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3031 3032 if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ) 3033 elem.phy_cap_info[0] &= 3034 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3035 3036 n = ieee80211_he_mcs_nss_size(&elem); 3037 ie_len = 2 + 1 + 3038 sizeof(he_cap->he_cap_elem) + n + 3039 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3040 he_cap->he_cap_elem.phy_cap_info); 3041 3042 if ((end - pos) < ie_len) 3043 return orig_pos; 3044 3045 *pos++ = WLAN_EID_EXTENSION; 3046 pos++; /* We'll set the size later below */ 3047 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 3048 3049 /* Fixed data */ 3050 memcpy(pos, &elem, sizeof(elem)); 3051 pos += sizeof(elem); 3052 3053 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 3054 pos += n; 3055 3056 /* Check if PPE Threshold should be present */ 3057 if ((he_cap->he_cap_elem.phy_cap_info[6] & 3058 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 3059 goto end; 3060 3061 /* 3062 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 3063 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 3064 */ 3065 n = hweight8(he_cap->ppe_thres[0] & 3066 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 3067 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 3068 IEEE80211_PPE_THRES_NSS_POS)); 3069 3070 /* 3071 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 3072 * total size. 3073 */ 3074 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 3075 n = DIV_ROUND_UP(n, 8); 3076 3077 /* Copy PPE Thresholds */ 3078 memcpy(pos, &he_cap->ppe_thres, n); 3079 pos += n; 3080 3081 end: 3082 orig_pos[1] = (pos - orig_pos) - 2; 3083 return pos; 3084 } 3085 3086 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata, 3087 enum ieee80211_smps_mode smps_mode, 3088 struct sk_buff *skb) 3089 { 3090 struct ieee80211_supported_band *sband; 3091 const struct ieee80211_sband_iftype_data *iftd; 3092 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3093 u8 *pos; 3094 u16 cap; 3095 3096 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 3097 BIT(NL80211_BAND_6GHZ), 3098 IEEE80211_CHAN_NO_HE)) 3099 return; 3100 3101 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3102 3103 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 3104 if (!iftd) 3105 return; 3106 3107 /* Check for device HE 6 GHz capability before adding element */ 3108 if (!iftd->he_6ghz_capa.capa) 3109 return; 3110 3111 cap = le16_to_cpu(iftd->he_6ghz_capa.capa); 3112 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS; 3113 3114 switch (smps_mode) { 3115 case IEEE80211_SMPS_AUTOMATIC: 3116 case IEEE80211_SMPS_NUM_MODES: 3117 WARN_ON(1); 3118 fallthrough; 3119 case IEEE80211_SMPS_OFF: 3120 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 3121 IEEE80211_HE_6GHZ_CAP_SM_PS); 3122 break; 3123 case IEEE80211_SMPS_STATIC: 3124 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 3125 IEEE80211_HE_6GHZ_CAP_SM_PS); 3126 break; 3127 case IEEE80211_SMPS_DYNAMIC: 3128 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 3129 IEEE80211_HE_6GHZ_CAP_SM_PS); 3130 break; 3131 } 3132 3133 pos = skb_put(skb, 2 + 1 + sizeof(cap)); 3134 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap), 3135 pos + 2 + 1 + sizeof(cap)); 3136 } 3137 3138 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3139 const struct cfg80211_chan_def *chandef, 3140 u16 prot_mode, bool rifs_mode) 3141 { 3142 struct ieee80211_ht_operation *ht_oper; 3143 /* Build HT Information */ 3144 *pos++ = WLAN_EID_HT_OPERATION; 3145 *pos++ = sizeof(struct ieee80211_ht_operation); 3146 ht_oper = (struct ieee80211_ht_operation *)pos; 3147 ht_oper->primary_chan = ieee80211_frequency_to_channel( 3148 chandef->chan->center_freq); 3149 switch (chandef->width) { 3150 case NL80211_CHAN_WIDTH_160: 3151 case NL80211_CHAN_WIDTH_80P80: 3152 case NL80211_CHAN_WIDTH_80: 3153 case NL80211_CHAN_WIDTH_40: 3154 if (chandef->center_freq1 > chandef->chan->center_freq) 3155 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3156 else 3157 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3158 break; 3159 case NL80211_CHAN_WIDTH_320: 3160 /* HT information element should not be included on 6GHz */ 3161 WARN_ON(1); 3162 return pos; 3163 default: 3164 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 3165 break; 3166 } 3167 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 3168 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 3169 chandef->width != NL80211_CHAN_WIDTH_20) 3170 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 3171 3172 if (rifs_mode) 3173 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 3174 3175 ht_oper->operation_mode = cpu_to_le16(prot_mode); 3176 ht_oper->stbc_param = 0x0000; 3177 3178 /* It seems that Basic MCS set and Supported MCS set 3179 are identical for the first 10 bytes */ 3180 memset(&ht_oper->basic_set, 0, 16); 3181 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 3182 3183 return pos + sizeof(struct ieee80211_ht_operation); 3184 } 3185 3186 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 3187 const struct cfg80211_chan_def *chandef) 3188 { 3189 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 3190 *pos++ = 3; /* IE length */ 3191 /* New channel width */ 3192 switch (chandef->width) { 3193 case NL80211_CHAN_WIDTH_80: 3194 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 3195 break; 3196 case NL80211_CHAN_WIDTH_160: 3197 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 3198 break; 3199 case NL80211_CHAN_WIDTH_80P80: 3200 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 3201 break; 3202 case NL80211_CHAN_WIDTH_320: 3203 /* The behavior is not defined for 320 MHz channels */ 3204 WARN_ON(1); 3205 fallthrough; 3206 default: 3207 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 3208 } 3209 3210 /* new center frequency segment 0 */ 3211 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 3212 /* new center frequency segment 1 */ 3213 if (chandef->center_freq2) 3214 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 3215 else 3216 *pos++ = 0; 3217 } 3218 3219 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3220 const struct cfg80211_chan_def *chandef) 3221 { 3222 struct ieee80211_vht_operation *vht_oper; 3223 3224 *pos++ = WLAN_EID_VHT_OPERATION; 3225 *pos++ = sizeof(struct ieee80211_vht_operation); 3226 vht_oper = (struct ieee80211_vht_operation *)pos; 3227 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 3228 chandef->center_freq1); 3229 if (chandef->center_freq2) 3230 vht_oper->center_freq_seg1_idx = 3231 ieee80211_frequency_to_channel(chandef->center_freq2); 3232 else 3233 vht_oper->center_freq_seg1_idx = 0x00; 3234 3235 switch (chandef->width) { 3236 case NL80211_CHAN_WIDTH_160: 3237 /* 3238 * Convert 160 MHz channel width to new style as interop 3239 * workaround. 3240 */ 3241 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3242 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 3243 if (chandef->chan->center_freq < chandef->center_freq1) 3244 vht_oper->center_freq_seg0_idx -= 8; 3245 else 3246 vht_oper->center_freq_seg0_idx += 8; 3247 break; 3248 case NL80211_CHAN_WIDTH_80P80: 3249 /* 3250 * Convert 80+80 MHz channel width to new style as interop 3251 * workaround. 3252 */ 3253 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3254 break; 3255 case NL80211_CHAN_WIDTH_80: 3256 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3257 break; 3258 case NL80211_CHAN_WIDTH_320: 3259 /* VHT information element should not be included on 6GHz */ 3260 WARN_ON(1); 3261 return pos; 3262 default: 3263 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 3264 break; 3265 } 3266 3267 /* don't require special VHT peer rates */ 3268 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 3269 3270 return pos + sizeof(struct ieee80211_vht_operation); 3271 } 3272 3273 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef) 3274 { 3275 struct ieee80211_he_operation *he_oper; 3276 struct ieee80211_he_6ghz_oper *he_6ghz_op; 3277 u32 he_oper_params; 3278 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 3279 3280 if (chandef->chan->band == NL80211_BAND_6GHZ) 3281 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 3282 3283 *pos++ = WLAN_EID_EXTENSION; 3284 *pos++ = ie_len; 3285 *pos++ = WLAN_EID_EXT_HE_OPERATION; 3286 3287 he_oper_params = 0; 3288 he_oper_params |= u32_encode_bits(1023, /* disabled */ 3289 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3290 he_oper_params |= u32_encode_bits(1, 3291 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 3292 he_oper_params |= u32_encode_bits(1, 3293 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3294 if (chandef->chan->band == NL80211_BAND_6GHZ) 3295 he_oper_params |= u32_encode_bits(1, 3296 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 3297 3298 he_oper = (struct ieee80211_he_operation *)pos; 3299 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 3300 3301 /* don't require special HE peer rates */ 3302 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 3303 pos += sizeof(struct ieee80211_he_operation); 3304 3305 if (chandef->chan->band != NL80211_BAND_6GHZ) 3306 goto out; 3307 3308 /* TODO add VHT operational */ 3309 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3310 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3311 he_6ghz_op->primary = 3312 ieee80211_frequency_to_channel(chandef->chan->center_freq); 3313 he_6ghz_op->ccfs0 = 3314 ieee80211_frequency_to_channel(chandef->center_freq1); 3315 if (chandef->center_freq2) 3316 he_6ghz_op->ccfs1 = 3317 ieee80211_frequency_to_channel(chandef->center_freq2); 3318 else 3319 he_6ghz_op->ccfs1 = 0; 3320 3321 switch (chandef->width) { 3322 case NL80211_CHAN_WIDTH_320: 3323 /* 3324 * TODO: mesh operation is not defined over 6GHz 320 MHz 3325 * channels. 3326 */ 3327 WARN_ON(1); 3328 break; 3329 case NL80211_CHAN_WIDTH_160: 3330 /* Convert 160 MHz channel width to new style as interop 3331 * workaround. 3332 */ 3333 he_6ghz_op->control = 3334 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3335 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3336 if (chandef->chan->center_freq < chandef->center_freq1) 3337 he_6ghz_op->ccfs0 -= 8; 3338 else 3339 he_6ghz_op->ccfs0 += 8; 3340 fallthrough; 3341 case NL80211_CHAN_WIDTH_80P80: 3342 he_6ghz_op->control = 3343 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3344 break; 3345 case NL80211_CHAN_WIDTH_80: 3346 he_6ghz_op->control = 3347 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3348 break; 3349 case NL80211_CHAN_WIDTH_40: 3350 he_6ghz_op->control = 3351 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3352 break; 3353 default: 3354 he_6ghz_op->control = 3355 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3356 break; 3357 } 3358 3359 pos += sizeof(struct ieee80211_he_6ghz_oper); 3360 3361 out: 3362 return pos; 3363 } 3364 3365 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3366 struct cfg80211_chan_def *chandef) 3367 { 3368 enum nl80211_channel_type channel_type; 3369 3370 if (!ht_oper) 3371 return false; 3372 3373 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3374 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3375 channel_type = NL80211_CHAN_HT20; 3376 break; 3377 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3378 channel_type = NL80211_CHAN_HT40PLUS; 3379 break; 3380 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3381 channel_type = NL80211_CHAN_HT40MINUS; 3382 break; 3383 default: 3384 return false; 3385 } 3386 3387 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3388 return true; 3389 } 3390 3391 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3392 const struct ieee80211_vht_operation *oper, 3393 const struct ieee80211_ht_operation *htop, 3394 struct cfg80211_chan_def *chandef) 3395 { 3396 struct cfg80211_chan_def new = *chandef; 3397 int cf0, cf1; 3398 int ccfs0, ccfs1, ccfs2; 3399 int ccf0, ccf1; 3400 u32 vht_cap; 3401 bool support_80_80 = false; 3402 bool support_160 = false; 3403 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3404 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3405 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3406 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3407 3408 if (!oper || !htop) 3409 return false; 3410 3411 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3412 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3413 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3414 support_80_80 = ((vht_cap & 3415 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3416 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3417 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3418 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3419 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3420 ccfs0 = oper->center_freq_seg0_idx; 3421 ccfs1 = oper->center_freq_seg1_idx; 3422 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3423 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3424 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3425 3426 ccf0 = ccfs0; 3427 3428 /* if not supported, parse as though we didn't understand it */ 3429 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3430 ext_nss_bw_supp = 0; 3431 3432 /* 3433 * Cf. IEEE 802.11 Table 9-250 3434 * 3435 * We really just consider that because it's inefficient to connect 3436 * at a higher bandwidth than we'll actually be able to use. 3437 */ 3438 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3439 default: 3440 case 0x00: 3441 ccf1 = 0; 3442 support_160 = false; 3443 support_80_80 = false; 3444 break; 3445 case 0x01: 3446 support_80_80 = false; 3447 fallthrough; 3448 case 0x02: 3449 case 0x03: 3450 ccf1 = ccfs2; 3451 break; 3452 case 0x10: 3453 ccf1 = ccfs1; 3454 break; 3455 case 0x11: 3456 case 0x12: 3457 if (!ccfs1) 3458 ccf1 = ccfs2; 3459 else 3460 ccf1 = ccfs1; 3461 break; 3462 case 0x13: 3463 case 0x20: 3464 case 0x23: 3465 ccf1 = ccfs1; 3466 break; 3467 } 3468 3469 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3470 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3471 3472 switch (oper->chan_width) { 3473 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3474 /* just use HT information directly */ 3475 break; 3476 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3477 new.width = NL80211_CHAN_WIDTH_80; 3478 new.center_freq1 = cf0; 3479 /* If needed, adjust based on the newer interop workaround. */ 3480 if (ccf1) { 3481 unsigned int diff; 3482 3483 diff = abs(ccf1 - ccf0); 3484 if ((diff == 8) && support_160) { 3485 new.width = NL80211_CHAN_WIDTH_160; 3486 new.center_freq1 = cf1; 3487 } else if ((diff > 8) && support_80_80) { 3488 new.width = NL80211_CHAN_WIDTH_80P80; 3489 new.center_freq2 = cf1; 3490 } 3491 } 3492 break; 3493 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3494 /* deprecated encoding */ 3495 new.width = NL80211_CHAN_WIDTH_160; 3496 new.center_freq1 = cf0; 3497 break; 3498 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3499 /* deprecated encoding */ 3500 new.width = NL80211_CHAN_WIDTH_80P80; 3501 new.center_freq1 = cf0; 3502 new.center_freq2 = cf1; 3503 break; 3504 default: 3505 return false; 3506 } 3507 3508 if (!cfg80211_chandef_valid(&new)) 3509 return false; 3510 3511 *chandef = new; 3512 return true; 3513 } 3514 3515 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper, 3516 bool support_160, bool support_320, 3517 struct cfg80211_chan_def *chandef) 3518 { 3519 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 3520 3521 chandef->center_freq1 = 3522 ieee80211_channel_to_frequency(info->ccfs0, 3523 chandef->chan->band); 3524 3525 switch (u8_get_bits(info->control, 3526 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3527 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3528 chandef->width = NL80211_CHAN_WIDTH_20; 3529 break; 3530 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3531 chandef->width = NL80211_CHAN_WIDTH_40; 3532 break; 3533 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3534 chandef->width = NL80211_CHAN_WIDTH_80; 3535 break; 3536 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3537 if (support_160) { 3538 chandef->width = NL80211_CHAN_WIDTH_160; 3539 chandef->center_freq1 = 3540 ieee80211_channel_to_frequency(info->ccfs1, 3541 chandef->chan->band); 3542 } else { 3543 chandef->width = NL80211_CHAN_WIDTH_80; 3544 } 3545 break; 3546 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3547 if (support_320) { 3548 chandef->width = NL80211_CHAN_WIDTH_320; 3549 chandef->center_freq1 = 3550 ieee80211_channel_to_frequency(info->ccfs1, 3551 chandef->chan->band); 3552 } else if (support_160) { 3553 chandef->width = NL80211_CHAN_WIDTH_160; 3554 } else { 3555 chandef->width = NL80211_CHAN_WIDTH_80; 3556 3557 if (chandef->center_freq1 > chandef->chan->center_freq) 3558 chandef->center_freq1 -= 40; 3559 else 3560 chandef->center_freq1 += 40; 3561 } 3562 break; 3563 } 3564 } 3565 3566 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata, 3567 const struct ieee80211_he_operation *he_oper, 3568 const struct ieee80211_eht_operation *eht_oper, 3569 struct cfg80211_chan_def *chandef) 3570 { 3571 struct ieee80211_local *local = sdata->local; 3572 struct ieee80211_supported_band *sband; 3573 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3574 const struct ieee80211_sta_he_cap *he_cap; 3575 const struct ieee80211_sta_eht_cap *eht_cap; 3576 struct cfg80211_chan_def he_chandef = *chandef; 3577 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3578 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3579 bool support_80_80, support_160, support_320; 3580 u8 he_phy_cap, eht_phy_cap; 3581 u32 freq; 3582 3583 if (chandef->chan->band != NL80211_BAND_6GHZ) 3584 return true; 3585 3586 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3587 3588 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3589 if (!he_cap) { 3590 sdata_info(sdata, "Missing iftype sband data/HE cap"); 3591 return false; 3592 } 3593 3594 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0]; 3595 support_160 = 3596 he_phy_cap & 3597 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3598 support_80_80 = 3599 he_phy_cap & 3600 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3601 3602 if (!he_oper) { 3603 sdata_info(sdata, 3604 "HE is not advertised on (on %d MHz), expect issues\n", 3605 chandef->chan->center_freq); 3606 return false; 3607 } 3608 3609 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 3610 if (!eht_cap) { 3611 sdata_info(sdata, "Missing iftype sband data/EHT cap"); 3612 eht_oper = NULL; 3613 } 3614 3615 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3616 3617 if (!he_6ghz_oper) { 3618 sdata_info(sdata, 3619 "HE 6GHz operation missing (on %d MHz), expect issues\n", 3620 chandef->chan->center_freq); 3621 return false; 3622 } 3623 3624 /* 3625 * The EHT operation IE does not contain the primary channel so the 3626 * primary channel frequency should be taken from the 6 GHz operation 3627 * information. 3628 */ 3629 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3630 NL80211_BAND_6GHZ); 3631 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 3632 3633 switch (u8_get_bits(he_6ghz_oper->control, 3634 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 3635 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 3636 bss_conf->power_type = IEEE80211_REG_LPI_AP; 3637 break; 3638 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 3639 bss_conf->power_type = IEEE80211_REG_SP_AP; 3640 break; 3641 default: 3642 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 3643 break; 3644 } 3645 3646 if (!eht_oper || 3647 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3648 switch (u8_get_bits(he_6ghz_oper->control, 3649 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3650 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3651 he_chandef.width = NL80211_CHAN_WIDTH_20; 3652 break; 3653 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3654 he_chandef.width = NL80211_CHAN_WIDTH_40; 3655 break; 3656 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3657 he_chandef.width = NL80211_CHAN_WIDTH_80; 3658 break; 3659 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3660 he_chandef.width = NL80211_CHAN_WIDTH_80; 3661 if (!he_6ghz_oper->ccfs1) 3662 break; 3663 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) { 3664 if (support_160) 3665 he_chandef.width = NL80211_CHAN_WIDTH_160; 3666 } else { 3667 if (support_80_80) 3668 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3669 } 3670 break; 3671 } 3672 3673 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3674 he_chandef.center_freq1 = 3675 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3676 NL80211_BAND_6GHZ); 3677 } else { 3678 he_chandef.center_freq1 = 3679 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3680 NL80211_BAND_6GHZ); 3681 if (support_80_80 || support_160) 3682 he_chandef.center_freq2 = 3683 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3684 NL80211_BAND_6GHZ); 3685 } 3686 } else { 3687 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0]; 3688 support_320 = 3689 eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 3690 3691 ieee80211_chandef_eht_oper(eht_oper, support_160, 3692 support_320, &he_chandef); 3693 } 3694 3695 if (!cfg80211_chandef_valid(&he_chandef)) { 3696 sdata_info(sdata, 3697 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n", 3698 he_chandef.chan ? he_chandef.chan->center_freq : 0, 3699 he_chandef.width, 3700 he_chandef.center_freq1, 3701 he_chandef.center_freq2); 3702 return false; 3703 } 3704 3705 *chandef = he_chandef; 3706 3707 return true; 3708 } 3709 3710 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper, 3711 struct cfg80211_chan_def *chandef) 3712 { 3713 u32 oper_freq; 3714 3715 if (!oper) 3716 return false; 3717 3718 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3719 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3720 chandef->width = NL80211_CHAN_WIDTH_1; 3721 break; 3722 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3723 chandef->width = NL80211_CHAN_WIDTH_2; 3724 break; 3725 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3726 chandef->width = NL80211_CHAN_WIDTH_4; 3727 break; 3728 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3729 chandef->width = NL80211_CHAN_WIDTH_8; 3730 break; 3731 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3732 chandef->width = NL80211_CHAN_WIDTH_16; 3733 break; 3734 default: 3735 return false; 3736 } 3737 3738 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch, 3739 NL80211_BAND_S1GHZ); 3740 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq); 3741 chandef->freq1_offset = oper_freq % 1000; 3742 3743 return true; 3744 } 3745 3746 int ieee80211_parse_bitrates(enum nl80211_chan_width width, 3747 const struct ieee80211_supported_band *sband, 3748 const u8 *srates, int srates_len, u32 *rates) 3749 { 3750 u32 rate_flags = ieee80211_chanwidth_rate_flags(width); 3751 int shift = ieee80211_chanwidth_get_shift(width); 3752 struct ieee80211_rate *br; 3753 int brate, rate, i, j, count = 0; 3754 3755 *rates = 0; 3756 3757 for (i = 0; i < srates_len; i++) { 3758 rate = srates[i] & 0x7f; 3759 3760 for (j = 0; j < sband->n_bitrates; j++) { 3761 br = &sband->bitrates[j]; 3762 if ((rate_flags & br->flags) != rate_flags) 3763 continue; 3764 3765 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3766 if (brate == rate) { 3767 *rates |= BIT(j); 3768 count++; 3769 break; 3770 } 3771 } 3772 } 3773 return count; 3774 } 3775 3776 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3777 struct sk_buff *skb, bool need_basic, 3778 enum nl80211_band band) 3779 { 3780 struct ieee80211_local *local = sdata->local; 3781 struct ieee80211_supported_band *sband; 3782 int rate, shift; 3783 u8 i, rates, *pos; 3784 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3785 u32 rate_flags; 3786 3787 shift = ieee80211_vif_get_shift(&sdata->vif); 3788 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3789 sband = local->hw.wiphy->bands[band]; 3790 rates = 0; 3791 for (i = 0; i < sband->n_bitrates; i++) { 3792 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3793 continue; 3794 rates++; 3795 } 3796 if (rates > 8) 3797 rates = 8; 3798 3799 if (skb_tailroom(skb) < rates + 2) 3800 return -ENOMEM; 3801 3802 pos = skb_put(skb, rates + 2); 3803 *pos++ = WLAN_EID_SUPP_RATES; 3804 *pos++ = rates; 3805 for (i = 0; i < rates; i++) { 3806 u8 basic = 0; 3807 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3808 continue; 3809 3810 if (need_basic && basic_rates & BIT(i)) 3811 basic = 0x80; 3812 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3813 5 * (1 << shift)); 3814 *pos++ = basic | (u8) rate; 3815 } 3816 3817 return 0; 3818 } 3819 3820 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3821 struct sk_buff *skb, bool need_basic, 3822 enum nl80211_band band) 3823 { 3824 struct ieee80211_local *local = sdata->local; 3825 struct ieee80211_supported_band *sband; 3826 int rate, shift; 3827 u8 i, exrates, *pos; 3828 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3829 u32 rate_flags; 3830 3831 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3832 shift = ieee80211_vif_get_shift(&sdata->vif); 3833 3834 sband = local->hw.wiphy->bands[band]; 3835 exrates = 0; 3836 for (i = 0; i < sband->n_bitrates; i++) { 3837 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3838 continue; 3839 exrates++; 3840 } 3841 3842 if (exrates > 8) 3843 exrates -= 8; 3844 else 3845 exrates = 0; 3846 3847 if (skb_tailroom(skb) < exrates + 2) 3848 return -ENOMEM; 3849 3850 if (exrates) { 3851 pos = skb_put(skb, exrates + 2); 3852 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3853 *pos++ = exrates; 3854 for (i = 8; i < sband->n_bitrates; i++) { 3855 u8 basic = 0; 3856 if ((rate_flags & sband->bitrates[i].flags) 3857 != rate_flags) 3858 continue; 3859 if (need_basic && basic_rates & BIT(i)) 3860 basic = 0x80; 3861 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3862 5 * (1 << shift)); 3863 *pos++ = basic | (u8) rate; 3864 } 3865 } 3866 return 0; 3867 } 3868 3869 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3870 { 3871 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3872 3873 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3874 return 0; 3875 3876 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 3877 } 3878 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3879 3880 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3881 { 3882 if (!mcs) 3883 return 1; 3884 3885 /* TODO: consider rx_highest */ 3886 3887 if (mcs->rx_mask[3]) 3888 return 4; 3889 if (mcs->rx_mask[2]) 3890 return 3; 3891 if (mcs->rx_mask[1]) 3892 return 2; 3893 return 1; 3894 } 3895 3896 /** 3897 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3898 * @local: mac80211 hw info struct 3899 * @status: RX status 3900 * @mpdu_len: total MPDU length (including FCS) 3901 * @mpdu_offset: offset into MPDU to calculate timestamp at 3902 * 3903 * This function calculates the RX timestamp at the given MPDU offset, taking 3904 * into account what the RX timestamp was. An offset of 0 will just normalize 3905 * the timestamp to TSF at beginning of MPDU reception. 3906 */ 3907 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3908 struct ieee80211_rx_status *status, 3909 unsigned int mpdu_len, 3910 unsigned int mpdu_offset) 3911 { 3912 u64 ts = status->mactime; 3913 struct rate_info ri; 3914 u16 rate; 3915 u8 n_ltf; 3916 3917 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3918 return 0; 3919 3920 memset(&ri, 0, sizeof(ri)); 3921 3922 ri.bw = status->bw; 3923 3924 /* Fill cfg80211 rate info */ 3925 switch (status->encoding) { 3926 case RX_ENC_HE: 3927 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3928 ri.mcs = status->rate_idx; 3929 ri.nss = status->nss; 3930 ri.he_ru_alloc = status->he_ru; 3931 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3932 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3933 3934 /* 3935 * See P802.11ax_D6.0, section 27.3.4 for 3936 * VHT PPDU format. 3937 */ 3938 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3939 mpdu_offset += 2; 3940 ts += 36; 3941 3942 /* 3943 * TODO: 3944 * For HE MU PPDU, add the HE-SIG-B. 3945 * For HE ER PPDU, add 8us for the HE-SIG-A. 3946 * For HE TB PPDU, add 4us for the HE-STF. 3947 * Add the HE-LTF durations - variable. 3948 */ 3949 } 3950 3951 break; 3952 case RX_ENC_HT: 3953 ri.mcs = status->rate_idx; 3954 ri.flags |= RATE_INFO_FLAGS_MCS; 3955 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3956 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3957 3958 /* 3959 * See P802.11REVmd_D3.0, section 19.3.2 for 3960 * HT PPDU format. 3961 */ 3962 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3963 mpdu_offset += 2; 3964 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3965 ts += 24; 3966 else 3967 ts += 32; 3968 3969 /* 3970 * Add Data HT-LTFs per streams 3971 * TODO: add Extension HT-LTFs, 4us per LTF 3972 */ 3973 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3974 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3975 ts += n_ltf * 4; 3976 } 3977 3978 break; 3979 case RX_ENC_VHT: 3980 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3981 ri.mcs = status->rate_idx; 3982 ri.nss = status->nss; 3983 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3984 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3985 3986 /* 3987 * See P802.11REVmd_D3.0, section 21.3.2 for 3988 * VHT PPDU format. 3989 */ 3990 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3991 mpdu_offset += 2; 3992 ts += 36; 3993 3994 /* 3995 * Add VHT-LTFs per streams 3996 */ 3997 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3998 ri.nss + 1 : ri.nss; 3999 ts += 4 * n_ltf; 4000 } 4001 4002 break; 4003 default: 4004 WARN_ON(1); 4005 fallthrough; 4006 case RX_ENC_LEGACY: { 4007 struct ieee80211_supported_band *sband; 4008 int shift = 0; 4009 int bitrate; 4010 4011 switch (status->bw) { 4012 case RATE_INFO_BW_10: 4013 shift = 1; 4014 break; 4015 case RATE_INFO_BW_5: 4016 shift = 2; 4017 break; 4018 } 4019 4020 sband = local->hw.wiphy->bands[status->band]; 4021 bitrate = sband->bitrates[status->rate_idx].bitrate; 4022 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 4023 4024 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4025 if (status->band == NL80211_BAND_5GHZ) { 4026 ts += 20 << shift; 4027 mpdu_offset += 2; 4028 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 4029 ts += 96; 4030 } else { 4031 ts += 192; 4032 } 4033 } 4034 break; 4035 } 4036 } 4037 4038 rate = cfg80211_calculate_bitrate(&ri); 4039 if (WARN_ONCE(!rate, 4040 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 4041 (unsigned long long)status->flag, status->rate_idx, 4042 status->nss)) 4043 return 0; 4044 4045 /* rewind from end of MPDU */ 4046 if (status->flag & RX_FLAG_MACTIME_END) 4047 ts -= mpdu_len * 8 * 10 / rate; 4048 4049 ts += mpdu_offset * 8 * 10 / rate; 4050 4051 return ts; 4052 } 4053 4054 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 4055 { 4056 struct ieee80211_sub_if_data *sdata; 4057 struct cfg80211_chan_def chandef; 4058 4059 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 4060 lockdep_assert_wiphy(local->hw.wiphy); 4061 4062 mutex_lock(&local->mtx); 4063 list_for_each_entry(sdata, &local->interfaces, list) { 4064 /* it might be waiting for the local->mtx, but then 4065 * by the time it gets it, sdata->wdev.cac_started 4066 * will no longer be true 4067 */ 4068 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work); 4069 4070 if (sdata->wdev.cac_started) { 4071 chandef = sdata->vif.bss_conf.chandef; 4072 ieee80211_link_release_channel(&sdata->deflink); 4073 cfg80211_cac_event(sdata->dev, 4074 &chandef, 4075 NL80211_RADAR_CAC_ABORTED, 4076 GFP_KERNEL); 4077 } 4078 } 4079 mutex_unlock(&local->mtx); 4080 } 4081 4082 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 4083 { 4084 struct ieee80211_local *local = 4085 container_of(work, struct ieee80211_local, radar_detected_work); 4086 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 4087 struct ieee80211_chanctx *ctx; 4088 int num_chanctx = 0; 4089 4090 mutex_lock(&local->chanctx_mtx); 4091 list_for_each_entry(ctx, &local->chanctx_list, list) { 4092 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 4093 continue; 4094 4095 num_chanctx++; 4096 chandef = ctx->conf.def; 4097 } 4098 mutex_unlock(&local->chanctx_mtx); 4099 4100 wiphy_lock(local->hw.wiphy); 4101 ieee80211_dfs_cac_cancel(local); 4102 wiphy_unlock(local->hw.wiphy); 4103 4104 if (num_chanctx > 1) 4105 /* XXX: multi-channel is not supported yet */ 4106 WARN_ON(1); 4107 else 4108 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 4109 } 4110 4111 void ieee80211_radar_detected(struct ieee80211_hw *hw) 4112 { 4113 struct ieee80211_local *local = hw_to_local(hw); 4114 4115 trace_api_radar_detected(local); 4116 4117 schedule_work(&local->radar_detected_work); 4118 } 4119 EXPORT_SYMBOL(ieee80211_radar_detected); 4120 4121 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 4122 { 4123 ieee80211_conn_flags_t ret; 4124 int tmp; 4125 4126 switch (c->width) { 4127 case NL80211_CHAN_WIDTH_20: 4128 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4129 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4130 break; 4131 case NL80211_CHAN_WIDTH_40: 4132 c->width = NL80211_CHAN_WIDTH_20; 4133 c->center_freq1 = c->chan->center_freq; 4134 ret = IEEE80211_CONN_DISABLE_40MHZ | 4135 IEEE80211_CONN_DISABLE_VHT; 4136 break; 4137 case NL80211_CHAN_WIDTH_80: 4138 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 4139 /* n_P40 */ 4140 tmp /= 2; 4141 /* freq_P40 */ 4142 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 4143 c->width = NL80211_CHAN_WIDTH_40; 4144 ret = IEEE80211_CONN_DISABLE_VHT; 4145 break; 4146 case NL80211_CHAN_WIDTH_80P80: 4147 c->center_freq2 = 0; 4148 c->width = NL80211_CHAN_WIDTH_80; 4149 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4150 IEEE80211_CONN_DISABLE_160MHZ; 4151 break; 4152 case NL80211_CHAN_WIDTH_160: 4153 /* n_P20 */ 4154 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 4155 /* n_P80 */ 4156 tmp /= 4; 4157 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 4158 c->width = NL80211_CHAN_WIDTH_80; 4159 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4160 IEEE80211_CONN_DISABLE_160MHZ; 4161 break; 4162 case NL80211_CHAN_WIDTH_320: 4163 /* n_P20 */ 4164 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; 4165 /* n_P160 */ 4166 tmp /= 8; 4167 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp; 4168 c->width = NL80211_CHAN_WIDTH_160; 4169 ret = IEEE80211_CONN_DISABLE_320MHZ; 4170 break; 4171 default: 4172 case NL80211_CHAN_WIDTH_20_NOHT: 4173 WARN_ON_ONCE(1); 4174 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4175 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4176 break; 4177 case NL80211_CHAN_WIDTH_1: 4178 case NL80211_CHAN_WIDTH_2: 4179 case NL80211_CHAN_WIDTH_4: 4180 case NL80211_CHAN_WIDTH_8: 4181 case NL80211_CHAN_WIDTH_16: 4182 case NL80211_CHAN_WIDTH_5: 4183 case NL80211_CHAN_WIDTH_10: 4184 WARN_ON_ONCE(1); 4185 /* keep c->width */ 4186 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4187 break; 4188 } 4189 4190 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 4191 4192 return ret; 4193 } 4194 4195 /* 4196 * Returns true if smps_mode_new is strictly more restrictive than 4197 * smps_mode_old. 4198 */ 4199 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 4200 enum ieee80211_smps_mode smps_mode_new) 4201 { 4202 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 4203 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 4204 return false; 4205 4206 switch (smps_mode_old) { 4207 case IEEE80211_SMPS_STATIC: 4208 return false; 4209 case IEEE80211_SMPS_DYNAMIC: 4210 return smps_mode_new == IEEE80211_SMPS_STATIC; 4211 case IEEE80211_SMPS_OFF: 4212 return smps_mode_new != IEEE80211_SMPS_OFF; 4213 default: 4214 WARN_ON(1); 4215 } 4216 4217 return false; 4218 } 4219 4220 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 4221 struct cfg80211_csa_settings *csa_settings) 4222 { 4223 struct sk_buff *skb; 4224 struct ieee80211_mgmt *mgmt; 4225 struct ieee80211_local *local = sdata->local; 4226 int freq; 4227 int hdr_len = offsetofend(struct ieee80211_mgmt, 4228 u.action.u.chan_switch); 4229 u8 *pos; 4230 4231 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 4232 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 4233 return -EOPNOTSUPP; 4234 4235 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 4236 5 + /* channel switch announcement element */ 4237 3 + /* secondary channel offset element */ 4238 5 + /* wide bandwidth channel switch announcement */ 4239 8); /* mesh channel switch parameters element */ 4240 if (!skb) 4241 return -ENOMEM; 4242 4243 skb_reserve(skb, local->tx_headroom); 4244 mgmt = skb_put_zero(skb, hdr_len); 4245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 4246 IEEE80211_STYPE_ACTION); 4247 4248 eth_broadcast_addr(mgmt->da); 4249 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 4250 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4251 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 4252 } else { 4253 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 4254 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 4255 } 4256 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 4257 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 4258 pos = skb_put(skb, 5); 4259 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 4260 *pos++ = 3; /* IE length */ 4261 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 4262 freq = csa_settings->chandef.chan->center_freq; 4263 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 4264 *pos++ = csa_settings->count; /* count */ 4265 4266 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 4267 enum nl80211_channel_type ch_type; 4268 4269 skb_put(skb, 3); 4270 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 4271 *pos++ = 1; /* IE length */ 4272 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 4273 if (ch_type == NL80211_CHAN_HT40PLUS) 4274 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 4275 else 4276 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 4277 } 4278 4279 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4280 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 4281 4282 skb_put(skb, 8); 4283 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 4284 *pos++ = 6; /* IE length */ 4285 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 4286 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 4287 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 4288 *pos++ |= csa_settings->block_tx ? 4289 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 4290 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 4291 pos += 2; 4292 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 4293 pos += 2; 4294 } 4295 4296 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 4297 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 4298 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 4299 skb_put(skb, 5); 4300 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 4301 } 4302 4303 ieee80211_tx_skb(sdata, skb); 4304 return 0; 4305 } 4306 4307 static bool 4308 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 4309 { 4310 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 4311 int skip; 4312 4313 if (end > 0) 4314 return false; 4315 4316 /* One shot NOA */ 4317 if (data->count[i] == 1) 4318 return false; 4319 4320 if (data->desc[i].interval == 0) 4321 return false; 4322 4323 /* End time is in the past, check for repetitions */ 4324 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4325 if (data->count[i] < 255) { 4326 if (data->count[i] <= skip) { 4327 data->count[i] = 0; 4328 return false; 4329 } 4330 4331 data->count[i] -= skip; 4332 } 4333 4334 data->desc[i].start += skip * data->desc[i].interval; 4335 4336 return true; 4337 } 4338 4339 static bool 4340 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4341 s32 *offset) 4342 { 4343 bool ret = false; 4344 int i; 4345 4346 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4347 s32 cur; 4348 4349 if (!data->count[i]) 4350 continue; 4351 4352 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4353 ret = true; 4354 4355 cur = data->desc[i].start - tsf; 4356 if (cur > *offset) 4357 continue; 4358 4359 cur = data->desc[i].start + data->desc[i].duration - tsf; 4360 if (cur > *offset) 4361 *offset = cur; 4362 } 4363 4364 return ret; 4365 } 4366 4367 static u32 4368 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4369 { 4370 s32 offset = 0; 4371 int tries = 0; 4372 /* 4373 * arbitrary limit, used to avoid infinite loops when combined NoA 4374 * descriptors cover the full time period. 4375 */ 4376 int max_tries = 5; 4377 4378 ieee80211_extend_absent_time(data, tsf, &offset); 4379 do { 4380 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4381 break; 4382 4383 tries++; 4384 } while (tries < max_tries); 4385 4386 return offset; 4387 } 4388 4389 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4390 { 4391 u32 next_offset = BIT(31) - 1; 4392 int i; 4393 4394 data->absent = 0; 4395 data->has_next_tsf = false; 4396 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4397 s32 start; 4398 4399 if (!data->count[i]) 4400 continue; 4401 4402 ieee80211_extend_noa_desc(data, tsf, i); 4403 start = data->desc[i].start - tsf; 4404 if (start <= 0) 4405 data->absent |= BIT(i); 4406 4407 if (next_offset > start) 4408 next_offset = start; 4409 4410 data->has_next_tsf = true; 4411 } 4412 4413 if (data->absent) 4414 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4415 4416 data->next_tsf = tsf + next_offset; 4417 } 4418 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4419 4420 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4421 struct ieee80211_noa_data *data, u32 tsf) 4422 { 4423 int ret = 0; 4424 int i; 4425 4426 memset(data, 0, sizeof(*data)); 4427 4428 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4429 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4430 4431 if (!desc->count || !desc->duration) 4432 continue; 4433 4434 data->count[i] = desc->count; 4435 data->desc[i].start = le32_to_cpu(desc->start_time); 4436 data->desc[i].duration = le32_to_cpu(desc->duration); 4437 data->desc[i].interval = le32_to_cpu(desc->interval); 4438 4439 if (data->count[i] > 1 && 4440 data->desc[i].interval < data->desc[i].duration) 4441 continue; 4442 4443 ieee80211_extend_noa_desc(data, tsf, i); 4444 ret++; 4445 } 4446 4447 if (ret) 4448 ieee80211_update_p2p_noa(data, tsf); 4449 4450 return ret; 4451 } 4452 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4453 4454 void ieee80211_recalc_dtim(struct ieee80211_local *local, 4455 struct ieee80211_sub_if_data *sdata) 4456 { 4457 u64 tsf = drv_get_tsf(local, sdata); 4458 u64 dtim_count = 0; 4459 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4460 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4461 struct ps_data *ps; 4462 u8 bcns_from_dtim; 4463 4464 if (tsf == -1ULL || !beacon_int || !dtim_period) 4465 return; 4466 4467 if (sdata->vif.type == NL80211_IFTYPE_AP || 4468 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4469 if (!sdata->bss) 4470 return; 4471 4472 ps = &sdata->bss->ps; 4473 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4474 ps = &sdata->u.mesh.ps; 4475 } else { 4476 return; 4477 } 4478 4479 /* 4480 * actually finds last dtim_count, mac80211 will update in 4481 * __beacon_add_tim(). 4482 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4483 */ 4484 do_div(tsf, beacon_int); 4485 bcns_from_dtim = do_div(tsf, dtim_period); 4486 /* just had a DTIM */ 4487 if (!bcns_from_dtim) 4488 dtim_count = 0; 4489 else 4490 dtim_count = dtim_period - bcns_from_dtim; 4491 4492 ps->dtim_count = dtim_count; 4493 } 4494 4495 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4496 struct ieee80211_chanctx *ctx) 4497 { 4498 struct ieee80211_link_data *link; 4499 u8 radar_detect = 0; 4500 4501 lockdep_assert_held(&local->chanctx_mtx); 4502 4503 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4504 return 0; 4505 4506 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list) 4507 if (link->reserved_radar_required) 4508 radar_detect |= BIT(link->reserved_chandef.width); 4509 4510 /* 4511 * An in-place reservation context should not have any assigned vifs 4512 * until it replaces the other context. 4513 */ 4514 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 4515 !list_empty(&ctx->assigned_links)); 4516 4517 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) { 4518 if (!link->radar_required) 4519 continue; 4520 4521 radar_detect |= 4522 BIT(link->conf->chandef.width); 4523 } 4524 4525 return radar_detect; 4526 } 4527 4528 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4529 const struct cfg80211_chan_def *chandef, 4530 enum ieee80211_chanctx_mode chanmode, 4531 u8 radar_detect) 4532 { 4533 struct ieee80211_local *local = sdata->local; 4534 struct ieee80211_sub_if_data *sdata_iter; 4535 enum nl80211_iftype iftype = sdata->wdev.iftype; 4536 struct ieee80211_chanctx *ctx; 4537 int total = 1; 4538 struct iface_combination_params params = { 4539 .radar_detect = radar_detect, 4540 }; 4541 4542 lockdep_assert_held(&local->chanctx_mtx); 4543 4544 if (WARN_ON(hweight32(radar_detect) > 1)) 4545 return -EINVAL; 4546 4547 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4548 !chandef->chan)) 4549 return -EINVAL; 4550 4551 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4552 return -EINVAL; 4553 4554 if (sdata->vif.type == NL80211_IFTYPE_AP || 4555 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4556 /* 4557 * always passing this is harmless, since it'll be the 4558 * same value that cfg80211 finds if it finds the same 4559 * interface ... and that's always allowed 4560 */ 4561 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4562 } 4563 4564 /* Always allow software iftypes */ 4565 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4566 if (radar_detect) 4567 return -EINVAL; 4568 return 0; 4569 } 4570 4571 if (chandef) 4572 params.num_different_channels = 1; 4573 4574 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4575 params.iftype_num[iftype] = 1; 4576 4577 list_for_each_entry(ctx, &local->chanctx_list, list) { 4578 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4579 continue; 4580 params.radar_detect |= 4581 ieee80211_chanctx_radar_detect(local, ctx); 4582 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 4583 params.num_different_channels++; 4584 continue; 4585 } 4586 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4587 cfg80211_chandef_compatible(chandef, 4588 &ctx->conf.def)) 4589 continue; 4590 params.num_different_channels++; 4591 } 4592 4593 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 4594 struct wireless_dev *wdev_iter; 4595 4596 wdev_iter = &sdata_iter->wdev; 4597 4598 if (sdata_iter == sdata || 4599 !ieee80211_sdata_running(sdata_iter) || 4600 cfg80211_iftype_allowed(local->hw.wiphy, 4601 wdev_iter->iftype, 0, 1)) 4602 continue; 4603 4604 params.iftype_num[wdev_iter->iftype]++; 4605 total++; 4606 } 4607 4608 if (total == 1 && !params.radar_detect) 4609 return 0; 4610 4611 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4612 } 4613 4614 static void 4615 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4616 void *data) 4617 { 4618 u32 *max_num_different_channels = data; 4619 4620 *max_num_different_channels = max(*max_num_different_channels, 4621 c->num_different_channels); 4622 } 4623 4624 int ieee80211_max_num_channels(struct ieee80211_local *local) 4625 { 4626 struct ieee80211_sub_if_data *sdata; 4627 struct ieee80211_chanctx *ctx; 4628 u32 max_num_different_channels = 1; 4629 int err; 4630 struct iface_combination_params params = {0}; 4631 4632 lockdep_assert_held(&local->chanctx_mtx); 4633 4634 list_for_each_entry(ctx, &local->chanctx_list, list) { 4635 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4636 continue; 4637 4638 params.num_different_channels++; 4639 4640 params.radar_detect |= 4641 ieee80211_chanctx_radar_detect(local, ctx); 4642 } 4643 4644 list_for_each_entry_rcu(sdata, &local->interfaces, list) 4645 params.iftype_num[sdata->wdev.iftype]++; 4646 4647 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4648 ieee80211_iter_max_chans, 4649 &max_num_different_channels); 4650 if (err < 0) 4651 return err; 4652 4653 return max_num_different_channels; 4654 } 4655 4656 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4657 struct ieee80211_sta_s1g_cap *caps, 4658 struct sk_buff *skb) 4659 { 4660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4661 struct ieee80211_s1g_cap s1g_capab; 4662 u8 *pos; 4663 int i; 4664 4665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4666 return; 4667 4668 if (!caps->s1g) 4669 return; 4670 4671 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4672 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4673 4674 /* override the capability info */ 4675 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4676 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4677 4678 s1g_capab.capab_info[i] &= ~mask; 4679 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4680 } 4681 4682 /* then MCS and NSS set */ 4683 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4684 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4685 4686 s1g_capab.supp_mcs_nss[i] &= ~mask; 4687 s1g_capab.supp_mcs_nss[i] |= 4688 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4689 } 4690 4691 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4692 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4693 *pos++ = sizeof(s1g_capab); 4694 4695 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4696 } 4697 4698 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4699 struct sk_buff *skb) 4700 { 4701 u8 *pos = skb_put(skb, 3); 4702 4703 *pos++ = WLAN_EID_AID_REQUEST; 4704 *pos++ = 1; 4705 *pos++ = 0; 4706 } 4707 4708 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4709 { 4710 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4711 *buf++ = 7; /* len */ 4712 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4713 *buf++ = 0x50; 4714 *buf++ = 0xf2; 4715 *buf++ = 2; /* WME */ 4716 *buf++ = 0; /* WME info */ 4717 *buf++ = 1; /* WME ver */ 4718 *buf++ = qosinfo; /* U-APSD no in use */ 4719 4720 return buf; 4721 } 4722 4723 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4724 unsigned long *frame_cnt, 4725 unsigned long *byte_cnt) 4726 { 4727 struct txq_info *txqi = to_txq_info(txq); 4728 u32 frag_cnt = 0, frag_bytes = 0; 4729 struct sk_buff *skb; 4730 4731 skb_queue_walk(&txqi->frags, skb) { 4732 frag_cnt++; 4733 frag_bytes += skb->len; 4734 } 4735 4736 if (frame_cnt) 4737 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4738 4739 if (byte_cnt) 4740 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4741 } 4742 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4743 4744 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4745 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4746 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4747 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4748 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4749 }; 4750 4751 u16 ieee80211_encode_usf(int listen_interval) 4752 { 4753 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4754 u16 ui, usf = 0; 4755 4756 /* find greatest USF */ 4757 while (usf < IEEE80211_MAX_USF) { 4758 if (listen_interval % listen_int_usf[usf + 1]) 4759 break; 4760 usf += 1; 4761 } 4762 ui = listen_interval / listen_int_usf[usf]; 4763 4764 /* error if there is a remainder. Should've been checked by user */ 4765 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4766 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4767 FIELD_PREP(LISTEN_INT_UI, ui); 4768 4769 return (u16) listen_interval; 4770 } 4771 4772 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 4773 { 4774 const struct ieee80211_sta_he_cap *he_cap; 4775 const struct ieee80211_sta_eht_cap *eht_cap; 4776 struct ieee80211_supported_band *sband; 4777 bool is_ap; 4778 u8 n; 4779 4780 sband = ieee80211_get_sband(sdata); 4781 if (!sband) 4782 return 0; 4783 4784 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 4785 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 4786 if (!he_cap || !eht_cap) 4787 return 0; 4788 4789 is_ap = iftype == NL80211_IFTYPE_AP || 4790 iftype == NL80211_IFTYPE_P2P_GO; 4791 4792 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4793 &eht_cap->eht_cap_elem, 4794 is_ap); 4795 return 2 + 1 + 4796 sizeof(he_cap->he_cap_elem) + n + 4797 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4798 eht_cap->eht_cap_elem.phy_cap_info); 4799 return 0; 4800 } 4801 4802 u8 *ieee80211_ie_build_eht_cap(u8 *pos, 4803 const struct ieee80211_sta_he_cap *he_cap, 4804 const struct ieee80211_sta_eht_cap *eht_cap, 4805 u8 *end, 4806 bool for_ap) 4807 { 4808 u8 mcs_nss_len, ppet_len; 4809 u8 ie_len; 4810 u8 *orig_pos = pos; 4811 4812 /* Make sure we have place for the IE */ 4813 if (!he_cap || !eht_cap) 4814 return orig_pos; 4815 4816 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4817 &eht_cap->eht_cap_elem, 4818 for_ap); 4819 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4820 eht_cap->eht_cap_elem.phy_cap_info); 4821 4822 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4823 if ((end - pos) < ie_len) 4824 return orig_pos; 4825 4826 *pos++ = WLAN_EID_EXTENSION; 4827 *pos++ = ie_len - 2; 4828 *pos++ = WLAN_EID_EXT_EHT_CAPABILITY; 4829 4830 /* Fixed data */ 4831 memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem)); 4832 pos += sizeof(eht_cap->eht_cap_elem); 4833 4834 memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4835 pos += mcs_nss_len; 4836 4837 if (ppet_len) { 4838 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len); 4839 pos += ppet_len; 4840 } 4841 4842 return pos; 4843 } 4844 4845 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos) 4846 { 4847 unsigned int elem_len; 4848 4849 if (!len_pos) 4850 return; 4851 4852 elem_len = skb->data + skb->len - len_pos - 1; 4853 4854 while (elem_len > 255) { 4855 /* this one is 255 */ 4856 *len_pos = 255; 4857 /* remaining data gets smaller */ 4858 elem_len -= 255; 4859 /* make space for the fragment ID/len in SKB */ 4860 skb_put(skb, 2); 4861 /* shift back the remaining data to place fragment ID/len */ 4862 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 4863 /* place the fragment ID */ 4864 len_pos += 255 + 1; 4865 *len_pos = WLAN_EID_FRAGMENT; 4866 /* and point to fragment length to update later */ 4867 len_pos++; 4868 } 4869 4870 *len_pos = elem_len; 4871 } 4872