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 wake_tx_push_queue(struct ieee80211_local *local, 292 struct ieee80211_sub_if_data *sdata, 293 struct ieee80211_txq *queue) 294 { 295 int q = sdata->vif.hw_queue[queue->ac]; 296 struct ieee80211_tx_control control = { 297 .sta = queue->sta, 298 }; 299 struct sk_buff *skb; 300 unsigned long flags; 301 bool q_stopped; 302 303 while (1) { 304 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 305 q_stopped = local->queue_stop_reasons[q]; 306 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 307 308 if (q_stopped) 309 break; 310 311 skb = ieee80211_tx_dequeue(&local->hw, queue); 312 if (!skb) 313 break; 314 315 drv_tx(local, &control, skb); 316 } 317 } 318 319 /* wake_tx_queue handler for driver not implementing a custom one*/ 320 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw, 321 struct ieee80211_txq *txq) 322 { 323 struct ieee80211_local *local = hw_to_local(hw); 324 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif); 325 struct ieee80211_txq *queue; 326 327 /* Use ieee80211_next_txq() for airtime fairness accounting */ 328 ieee80211_txq_schedule_start(hw, txq->ac); 329 while ((queue = ieee80211_next_txq(hw, txq->ac))) { 330 wake_tx_push_queue(local, sdata, queue); 331 ieee80211_return_txq(hw, queue, false); 332 } 333 ieee80211_txq_schedule_end(hw, txq->ac); 334 } 335 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue); 336 337 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 338 { 339 struct ieee80211_local *local = sdata->local; 340 struct ieee80211_vif *vif = &sdata->vif; 341 struct fq *fq = &local->fq; 342 struct ps_data *ps = NULL; 343 struct txq_info *txqi; 344 struct sta_info *sta; 345 int i; 346 347 local_bh_disable(); 348 spin_lock(&fq->lock); 349 350 sdata->vif.txqs_stopped[ac] = false; 351 352 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state)) 353 goto out; 354 355 if (sdata->vif.type == NL80211_IFTYPE_AP) 356 ps = &sdata->bss->ps; 357 358 list_for_each_entry_rcu(sta, &local->sta_list, list) { 359 if (sdata != sta->sdata) 360 continue; 361 362 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 363 struct ieee80211_txq *txq = sta->sta.txq[i]; 364 365 if (!txq) 366 continue; 367 368 txqi = to_txq_info(txq); 369 370 if (ac != txq->ac) 371 continue; 372 373 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 374 &txqi->flags)) 375 continue; 376 377 spin_unlock(&fq->lock); 378 drv_wake_tx_queue(local, txqi); 379 spin_lock(&fq->lock); 380 } 381 } 382 383 if (!vif->txq) 384 goto out; 385 386 txqi = to_txq_info(vif->txq); 387 388 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 389 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 390 goto out; 391 392 spin_unlock(&fq->lock); 393 394 drv_wake_tx_queue(local, txqi); 395 local_bh_enable(); 396 return; 397 out: 398 spin_unlock(&fq->lock); 399 local_bh_enable(); 400 } 401 402 static void 403 __releases(&local->queue_stop_reason_lock) 404 __acquires(&local->queue_stop_reason_lock) 405 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 406 { 407 struct ieee80211_sub_if_data *sdata; 408 int n_acs = IEEE80211_NUM_ACS; 409 int i; 410 411 rcu_read_lock(); 412 413 if (local->hw.queues < IEEE80211_NUM_ACS) 414 n_acs = 1; 415 416 for (i = 0; i < local->hw.queues; i++) { 417 if (local->queue_stop_reasons[i]) 418 continue; 419 420 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 421 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 422 int ac; 423 424 for (ac = 0; ac < n_acs; ac++) { 425 int ac_queue = sdata->vif.hw_queue[ac]; 426 427 if (ac_queue == i || 428 sdata->vif.cab_queue == i) 429 __ieee80211_wake_txqs(sdata, ac); 430 } 431 } 432 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 433 } 434 435 rcu_read_unlock(); 436 } 437 438 void ieee80211_wake_txqs(struct tasklet_struct *t) 439 { 440 struct ieee80211_local *local = from_tasklet(local, t, 441 wake_txqs_tasklet); 442 unsigned long flags; 443 444 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 445 _ieee80211_wake_txqs(local, &flags); 446 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 447 } 448 449 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 450 enum queue_stop_reason reason, 451 bool refcounted, 452 unsigned long *flags) 453 { 454 struct ieee80211_local *local = hw_to_local(hw); 455 456 trace_wake_queue(local, queue, reason); 457 458 if (WARN_ON(queue >= hw->queues)) 459 return; 460 461 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 462 return; 463 464 if (!refcounted) { 465 local->q_stop_reasons[queue][reason] = 0; 466 } else { 467 local->q_stop_reasons[queue][reason]--; 468 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 469 local->q_stop_reasons[queue][reason] = 0; 470 } 471 472 if (local->q_stop_reasons[queue][reason] == 0) 473 __clear_bit(reason, &local->queue_stop_reasons[queue]); 474 475 if (local->queue_stop_reasons[queue] != 0) 476 /* someone still has this queue stopped */ 477 return; 478 479 if (!skb_queue_empty(&local->pending[queue])) 480 tasklet_schedule(&local->tx_pending_tasklet); 481 482 /* 483 * Calling _ieee80211_wake_txqs here can be a problem because it may 484 * release queue_stop_reason_lock which has been taken by 485 * __ieee80211_wake_queue's caller. It is certainly not very nice to 486 * release someone's lock, but it is fine because all the callers of 487 * __ieee80211_wake_queue call it right before releasing the lock. 488 */ 489 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 490 tasklet_schedule(&local->wake_txqs_tasklet); 491 else 492 _ieee80211_wake_txqs(local, flags); 493 } 494 495 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 496 enum queue_stop_reason reason, 497 bool refcounted) 498 { 499 struct ieee80211_local *local = hw_to_local(hw); 500 unsigned long flags; 501 502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 503 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 504 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 505 } 506 507 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 508 { 509 ieee80211_wake_queue_by_reason(hw, queue, 510 IEEE80211_QUEUE_STOP_REASON_DRIVER, 511 false); 512 } 513 EXPORT_SYMBOL(ieee80211_wake_queue); 514 515 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 516 enum queue_stop_reason reason, 517 bool refcounted) 518 { 519 struct ieee80211_local *local = hw_to_local(hw); 520 struct ieee80211_sub_if_data *sdata; 521 int n_acs = IEEE80211_NUM_ACS; 522 523 trace_stop_queue(local, queue, reason); 524 525 if (WARN_ON(queue >= hw->queues)) 526 return; 527 528 if (!refcounted) 529 local->q_stop_reasons[queue][reason] = 1; 530 else 531 local->q_stop_reasons[queue][reason]++; 532 533 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 534 return; 535 536 if (local->hw.queues < IEEE80211_NUM_ACS) 537 n_acs = 1; 538 539 rcu_read_lock(); 540 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 541 int ac; 542 543 if (!sdata->dev) 544 continue; 545 546 for (ac = 0; ac < n_acs; ac++) { 547 if (sdata->vif.hw_queue[ac] == queue || 548 sdata->vif.cab_queue == queue) { 549 spin_lock(&local->fq.lock); 550 sdata->vif.txqs_stopped[ac] = true; 551 spin_unlock(&local->fq.lock); 552 } 553 } 554 } 555 rcu_read_unlock(); 556 } 557 558 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 559 enum queue_stop_reason reason, 560 bool refcounted) 561 { 562 struct ieee80211_local *local = hw_to_local(hw); 563 unsigned long flags; 564 565 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 566 __ieee80211_stop_queue(hw, queue, reason, refcounted); 567 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 568 } 569 570 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 571 { 572 ieee80211_stop_queue_by_reason(hw, queue, 573 IEEE80211_QUEUE_STOP_REASON_DRIVER, 574 false); 575 } 576 EXPORT_SYMBOL(ieee80211_stop_queue); 577 578 void ieee80211_add_pending_skb(struct ieee80211_local *local, 579 struct sk_buff *skb) 580 { 581 struct ieee80211_hw *hw = &local->hw; 582 unsigned long flags; 583 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 584 int queue = info->hw_queue; 585 586 if (WARN_ON(!info->control.vif)) { 587 ieee80211_free_txskb(&local->hw, skb); 588 return; 589 } 590 591 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 592 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 593 false); 594 __skb_queue_tail(&local->pending[queue], skb); 595 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 596 false, &flags); 597 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 598 } 599 600 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 601 struct sk_buff_head *skbs) 602 { 603 struct ieee80211_hw *hw = &local->hw; 604 struct sk_buff *skb; 605 unsigned long flags; 606 int queue, i; 607 608 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 609 while ((skb = skb_dequeue(skbs))) { 610 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 611 612 if (WARN_ON(!info->control.vif)) { 613 ieee80211_free_txskb(&local->hw, skb); 614 continue; 615 } 616 617 queue = info->hw_queue; 618 619 __ieee80211_stop_queue(hw, queue, 620 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 621 false); 622 623 __skb_queue_tail(&local->pending[queue], skb); 624 } 625 626 for (i = 0; i < hw->queues; i++) 627 __ieee80211_wake_queue(hw, i, 628 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 629 false, &flags); 630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 631 } 632 633 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 634 unsigned long queues, 635 enum queue_stop_reason reason, 636 bool refcounted) 637 { 638 struct ieee80211_local *local = hw_to_local(hw); 639 unsigned long flags; 640 int i; 641 642 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 643 644 for_each_set_bit(i, &queues, hw->queues) 645 __ieee80211_stop_queue(hw, i, reason, refcounted); 646 647 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 648 } 649 650 void ieee80211_stop_queues(struct ieee80211_hw *hw) 651 { 652 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 653 IEEE80211_QUEUE_STOP_REASON_DRIVER, 654 false); 655 } 656 EXPORT_SYMBOL(ieee80211_stop_queues); 657 658 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 659 { 660 struct ieee80211_local *local = hw_to_local(hw); 661 unsigned long flags; 662 int ret; 663 664 if (WARN_ON(queue >= hw->queues)) 665 return true; 666 667 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 668 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 669 &local->queue_stop_reasons[queue]); 670 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 671 return ret; 672 } 673 EXPORT_SYMBOL(ieee80211_queue_stopped); 674 675 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 676 unsigned long queues, 677 enum queue_stop_reason reason, 678 bool refcounted) 679 { 680 struct ieee80211_local *local = hw_to_local(hw); 681 unsigned long flags; 682 int i; 683 684 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 685 686 for_each_set_bit(i, &queues, hw->queues) 687 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 688 689 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 690 } 691 692 void ieee80211_wake_queues(struct ieee80211_hw *hw) 693 { 694 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 695 IEEE80211_QUEUE_STOP_REASON_DRIVER, 696 false); 697 } 698 EXPORT_SYMBOL(ieee80211_wake_queues); 699 700 static unsigned int 701 ieee80211_get_vif_queues(struct ieee80211_local *local, 702 struct ieee80211_sub_if_data *sdata) 703 { 704 unsigned int queues; 705 706 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 707 int ac; 708 709 queues = 0; 710 711 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 712 queues |= BIT(sdata->vif.hw_queue[ac]); 713 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 714 queues |= BIT(sdata->vif.cab_queue); 715 } else { 716 /* all queues */ 717 queues = BIT(local->hw.queues) - 1; 718 } 719 720 return queues; 721 } 722 723 void __ieee80211_flush_queues(struct ieee80211_local *local, 724 struct ieee80211_sub_if_data *sdata, 725 unsigned int queues, bool drop) 726 { 727 if (!local->ops->flush) 728 return; 729 730 /* 731 * If no queue was set, or if the HW doesn't support 732 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 733 */ 734 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 735 queues = ieee80211_get_vif_queues(local, sdata); 736 737 ieee80211_stop_queues_by_reason(&local->hw, queues, 738 IEEE80211_QUEUE_STOP_REASON_FLUSH, 739 false); 740 741 drv_flush(local, sdata, queues, drop); 742 743 ieee80211_wake_queues_by_reason(&local->hw, queues, 744 IEEE80211_QUEUE_STOP_REASON_FLUSH, 745 false); 746 } 747 748 void ieee80211_flush_queues(struct ieee80211_local *local, 749 struct ieee80211_sub_if_data *sdata, bool drop) 750 { 751 __ieee80211_flush_queues(local, sdata, 0, drop); 752 } 753 754 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 755 struct ieee80211_sub_if_data *sdata, 756 enum queue_stop_reason reason) 757 { 758 ieee80211_stop_queues_by_reason(&local->hw, 759 ieee80211_get_vif_queues(local, sdata), 760 reason, true); 761 } 762 763 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 764 struct ieee80211_sub_if_data *sdata, 765 enum queue_stop_reason reason) 766 { 767 ieee80211_wake_queues_by_reason(&local->hw, 768 ieee80211_get_vif_queues(local, sdata), 769 reason, true); 770 } 771 772 static void __iterate_interfaces(struct ieee80211_local *local, 773 u32 iter_flags, 774 void (*iterator)(void *data, u8 *mac, 775 struct ieee80211_vif *vif), 776 void *data) 777 { 778 struct ieee80211_sub_if_data *sdata; 779 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 780 781 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 782 switch (sdata->vif.type) { 783 case NL80211_IFTYPE_MONITOR: 784 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 785 continue; 786 break; 787 case NL80211_IFTYPE_AP_VLAN: 788 continue; 789 default: 790 break; 791 } 792 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 793 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 794 continue; 795 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 796 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 797 continue; 798 if (ieee80211_sdata_running(sdata) || !active_only) 799 iterator(data, sdata->vif.addr, 800 &sdata->vif); 801 } 802 803 sdata = rcu_dereference_check(local->monitor_sdata, 804 lockdep_is_held(&local->iflist_mtx) || 805 lockdep_is_held(&local->hw.wiphy->mtx)); 806 if (sdata && 807 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 808 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 809 iterator(data, sdata->vif.addr, &sdata->vif); 810 } 811 812 void ieee80211_iterate_interfaces( 813 struct ieee80211_hw *hw, u32 iter_flags, 814 void (*iterator)(void *data, u8 *mac, 815 struct ieee80211_vif *vif), 816 void *data) 817 { 818 struct ieee80211_local *local = hw_to_local(hw); 819 820 mutex_lock(&local->iflist_mtx); 821 __iterate_interfaces(local, iter_flags, iterator, data); 822 mutex_unlock(&local->iflist_mtx); 823 } 824 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 825 826 void ieee80211_iterate_active_interfaces_atomic( 827 struct ieee80211_hw *hw, u32 iter_flags, 828 void (*iterator)(void *data, u8 *mac, 829 struct ieee80211_vif *vif), 830 void *data) 831 { 832 struct ieee80211_local *local = hw_to_local(hw); 833 834 rcu_read_lock(); 835 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 836 iterator, data); 837 rcu_read_unlock(); 838 } 839 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 840 841 void ieee80211_iterate_active_interfaces_mtx( 842 struct ieee80211_hw *hw, u32 iter_flags, 843 void (*iterator)(void *data, u8 *mac, 844 struct ieee80211_vif *vif), 845 void *data) 846 { 847 struct ieee80211_local *local = hw_to_local(hw); 848 849 lockdep_assert_wiphy(hw->wiphy); 850 851 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 852 iterator, data); 853 } 854 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx); 855 856 static void __iterate_stations(struct ieee80211_local *local, 857 void (*iterator)(void *data, 858 struct ieee80211_sta *sta), 859 void *data) 860 { 861 struct sta_info *sta; 862 863 list_for_each_entry_rcu(sta, &local->sta_list, list) { 864 if (!sta->uploaded) 865 continue; 866 867 iterator(data, &sta->sta); 868 } 869 } 870 871 void ieee80211_iterate_stations(struct ieee80211_hw *hw, 872 void (*iterator)(void *data, 873 struct ieee80211_sta *sta), 874 void *data) 875 { 876 struct ieee80211_local *local = hw_to_local(hw); 877 878 mutex_lock(&local->sta_mtx); 879 __iterate_stations(local, iterator, data); 880 mutex_unlock(&local->sta_mtx); 881 } 882 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations); 883 884 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 885 void (*iterator)(void *data, 886 struct ieee80211_sta *sta), 887 void *data) 888 { 889 struct ieee80211_local *local = hw_to_local(hw); 890 891 rcu_read_lock(); 892 __iterate_stations(local, iterator, data); 893 rcu_read_unlock(); 894 } 895 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 896 897 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 898 { 899 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 900 901 if (!ieee80211_sdata_running(sdata) || 902 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 903 return NULL; 904 return &sdata->vif; 905 } 906 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 907 908 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 909 { 910 if (!vif) 911 return NULL; 912 913 return &vif_to_sdata(vif)->wdev; 914 } 915 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 916 917 /* 918 * Nothing should have been stuffed into the workqueue during 919 * the suspend->resume cycle. Since we can't check each caller 920 * of this function if we are already quiescing / suspended, 921 * check here and don't WARN since this can actually happen when 922 * the rx path (for example) is racing against __ieee80211_suspend 923 * and suspending / quiescing was set after the rx path checked 924 * them. 925 */ 926 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 927 { 928 if (local->quiescing || (local->suspended && !local->resuming)) { 929 pr_warn("queueing ieee80211 work while going to suspend\n"); 930 return false; 931 } 932 933 return true; 934 } 935 936 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 937 { 938 struct ieee80211_local *local = hw_to_local(hw); 939 940 if (!ieee80211_can_queue_work(local)) 941 return; 942 943 queue_work(local->workqueue, work); 944 } 945 EXPORT_SYMBOL(ieee80211_queue_work); 946 947 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 948 struct delayed_work *dwork, 949 unsigned long delay) 950 { 951 struct ieee80211_local *local = hw_to_local(hw); 952 953 if (!ieee80211_can_queue_work(local)) 954 return; 955 956 queue_delayed_work(local->workqueue, dwork, delay); 957 } 958 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 959 960 static void 961 ieee80211_parse_extension_element(u32 *crc, 962 const struct element *elem, 963 struct ieee802_11_elems *elems, 964 struct ieee80211_elems_parse_params *params) 965 { 966 const void *data = elem->data + 1; 967 u8 len; 968 969 if (!elem->datalen) 970 return; 971 972 len = elem->datalen - 1; 973 974 switch (elem->data[0]) { 975 case WLAN_EID_EXT_HE_MU_EDCA: 976 if (len >= sizeof(*elems->mu_edca_param_set)) { 977 elems->mu_edca_param_set = data; 978 if (crc) 979 *crc = crc32_be(*crc, (void *)elem, 980 elem->datalen + 2); 981 } 982 break; 983 case WLAN_EID_EXT_HE_CAPABILITY: 984 if (ieee80211_he_capa_size_ok(data, len)) { 985 elems->he_cap = data; 986 elems->he_cap_len = len; 987 } 988 break; 989 case WLAN_EID_EXT_HE_OPERATION: 990 if (len >= sizeof(*elems->he_operation) && 991 len >= ieee80211_he_oper_size(data) - 1) { 992 if (crc) 993 *crc = crc32_be(*crc, (void *)elem, 994 elem->datalen + 2); 995 elems->he_operation = data; 996 } 997 break; 998 case WLAN_EID_EXT_UORA: 999 if (len >= 1) 1000 elems->uora_element = data; 1001 break; 1002 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME: 1003 if (len == 3) 1004 elems->max_channel_switch_time = data; 1005 break; 1006 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION: 1007 if (len >= sizeof(*elems->mbssid_config_ie)) 1008 elems->mbssid_config_ie = data; 1009 break; 1010 case WLAN_EID_EXT_HE_SPR: 1011 if (len >= sizeof(*elems->he_spr) && 1012 len >= ieee80211_he_spr_size(data)) 1013 elems->he_spr = data; 1014 break; 1015 case WLAN_EID_EXT_HE_6GHZ_CAPA: 1016 if (len >= sizeof(*elems->he_6ghz_capa)) 1017 elems->he_6ghz_capa = data; 1018 break; 1019 case WLAN_EID_EXT_EHT_CAPABILITY: 1020 if (ieee80211_eht_capa_size_ok(elems->he_cap, 1021 data, len, 1022 params->from_ap)) { 1023 elems->eht_cap = data; 1024 elems->eht_cap_len = len; 1025 } 1026 break; 1027 case WLAN_EID_EXT_EHT_OPERATION: 1028 if (ieee80211_eht_oper_size_ok(data, len)) 1029 elems->eht_operation = data; 1030 break; 1031 case WLAN_EID_EXT_EHT_MULTI_LINK: 1032 if (ieee80211_mle_size_ok(data, len)) { 1033 elems->multi_link = (void *)data; 1034 elems->multi_link_len = len; 1035 } 1036 break; 1037 } 1038 } 1039 1040 static u32 1041 _ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params, 1042 struct ieee802_11_elems *elems, 1043 const struct element *check_inherit) 1044 { 1045 const struct element *elem; 1046 bool calc_crc = params->filter != 0; 1047 DECLARE_BITMAP(seen_elems, 256); 1048 u32 crc = params->crc; 1049 const u8 *ie; 1050 1051 bitmap_zero(seen_elems, 256); 1052 1053 for_each_element(elem, params->start, params->len) { 1054 bool elem_parse_failed; 1055 u8 id = elem->id; 1056 u8 elen = elem->datalen; 1057 const u8 *pos = elem->data; 1058 1059 if (check_inherit && 1060 !cfg80211_is_element_inherited(elem, 1061 check_inherit)) 1062 continue; 1063 1064 switch (id) { 1065 case WLAN_EID_SSID: 1066 case WLAN_EID_SUPP_RATES: 1067 case WLAN_EID_FH_PARAMS: 1068 case WLAN_EID_DS_PARAMS: 1069 case WLAN_EID_CF_PARAMS: 1070 case WLAN_EID_TIM: 1071 case WLAN_EID_IBSS_PARAMS: 1072 case WLAN_EID_CHALLENGE: 1073 case WLAN_EID_RSN: 1074 case WLAN_EID_ERP_INFO: 1075 case WLAN_EID_EXT_SUPP_RATES: 1076 case WLAN_EID_HT_CAPABILITY: 1077 case WLAN_EID_HT_OPERATION: 1078 case WLAN_EID_VHT_CAPABILITY: 1079 case WLAN_EID_VHT_OPERATION: 1080 case WLAN_EID_MESH_ID: 1081 case WLAN_EID_MESH_CONFIG: 1082 case WLAN_EID_PEER_MGMT: 1083 case WLAN_EID_PREQ: 1084 case WLAN_EID_PREP: 1085 case WLAN_EID_PERR: 1086 case WLAN_EID_RANN: 1087 case WLAN_EID_CHANNEL_SWITCH: 1088 case WLAN_EID_EXT_CHANSWITCH_ANN: 1089 case WLAN_EID_COUNTRY: 1090 case WLAN_EID_PWR_CONSTRAINT: 1091 case WLAN_EID_TIMEOUT_INTERVAL: 1092 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1093 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1094 case WLAN_EID_CHAN_SWITCH_PARAM: 1095 case WLAN_EID_EXT_CAPABILITY: 1096 case WLAN_EID_CHAN_SWITCH_TIMING: 1097 case WLAN_EID_LINK_ID: 1098 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1099 case WLAN_EID_RSNX: 1100 case WLAN_EID_S1G_BCN_COMPAT: 1101 case WLAN_EID_S1G_CAPABILITIES: 1102 case WLAN_EID_S1G_OPERATION: 1103 case WLAN_EID_AID_RESPONSE: 1104 case WLAN_EID_S1G_SHORT_BCN_INTERVAL: 1105 /* 1106 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 1107 * that if the content gets bigger it might be needed more than once 1108 */ 1109 if (test_bit(id, seen_elems)) { 1110 elems->parse_error = true; 1111 continue; 1112 } 1113 break; 1114 } 1115 1116 if (calc_crc && id < 64 && (params->filter & (1ULL << id))) 1117 crc = crc32_be(crc, pos - 2, elen + 2); 1118 1119 elem_parse_failed = false; 1120 1121 switch (id) { 1122 case WLAN_EID_LINK_ID: 1123 if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) { 1124 elem_parse_failed = true; 1125 break; 1126 } 1127 elems->lnk_id = (void *)(pos - 2); 1128 break; 1129 case WLAN_EID_CHAN_SWITCH_TIMING: 1130 if (elen < sizeof(struct ieee80211_ch_switch_timing)) { 1131 elem_parse_failed = true; 1132 break; 1133 } 1134 elems->ch_sw_timing = (void *)pos; 1135 break; 1136 case WLAN_EID_EXT_CAPABILITY: 1137 elems->ext_capab = pos; 1138 elems->ext_capab_len = elen; 1139 break; 1140 case WLAN_EID_SSID: 1141 elems->ssid = pos; 1142 elems->ssid_len = elen; 1143 break; 1144 case WLAN_EID_SUPP_RATES: 1145 elems->supp_rates = pos; 1146 elems->supp_rates_len = elen; 1147 break; 1148 case WLAN_EID_DS_PARAMS: 1149 if (elen >= 1) 1150 elems->ds_params = pos; 1151 else 1152 elem_parse_failed = true; 1153 break; 1154 case WLAN_EID_TIM: 1155 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1156 elems->tim = (void *)pos; 1157 elems->tim_len = elen; 1158 } else 1159 elem_parse_failed = true; 1160 break; 1161 case WLAN_EID_VENDOR_SPECIFIC: 1162 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1163 pos[2] == 0xf2) { 1164 /* Microsoft OUI (00:50:F2) */ 1165 1166 if (calc_crc) 1167 crc = crc32_be(crc, pos - 2, elen + 2); 1168 1169 if (elen >= 5 && pos[3] == 2) { 1170 /* OUI Type 2 - WMM IE */ 1171 if (pos[4] == 0) { 1172 elems->wmm_info = pos; 1173 elems->wmm_info_len = elen; 1174 } else if (pos[4] == 1) { 1175 elems->wmm_param = pos; 1176 elems->wmm_param_len = elen; 1177 } 1178 } 1179 } 1180 break; 1181 case WLAN_EID_RSN: 1182 elems->rsn = pos; 1183 elems->rsn_len = elen; 1184 break; 1185 case WLAN_EID_ERP_INFO: 1186 if (elen >= 1) 1187 elems->erp_info = pos; 1188 else 1189 elem_parse_failed = true; 1190 break; 1191 case WLAN_EID_EXT_SUPP_RATES: 1192 elems->ext_supp_rates = pos; 1193 elems->ext_supp_rates_len = elen; 1194 break; 1195 case WLAN_EID_HT_CAPABILITY: 1196 if (elen >= sizeof(struct ieee80211_ht_cap)) 1197 elems->ht_cap_elem = (void *)pos; 1198 else 1199 elem_parse_failed = true; 1200 break; 1201 case WLAN_EID_HT_OPERATION: 1202 if (elen >= sizeof(struct ieee80211_ht_operation)) 1203 elems->ht_operation = (void *)pos; 1204 else 1205 elem_parse_failed = true; 1206 break; 1207 case WLAN_EID_VHT_CAPABILITY: 1208 if (elen >= sizeof(struct ieee80211_vht_cap)) 1209 elems->vht_cap_elem = (void *)pos; 1210 else 1211 elem_parse_failed = true; 1212 break; 1213 case WLAN_EID_VHT_OPERATION: 1214 if (elen >= sizeof(struct ieee80211_vht_operation)) { 1215 elems->vht_operation = (void *)pos; 1216 if (calc_crc) 1217 crc = crc32_be(crc, pos - 2, elen + 2); 1218 break; 1219 } 1220 elem_parse_failed = true; 1221 break; 1222 case WLAN_EID_OPMODE_NOTIF: 1223 if (elen > 0) { 1224 elems->opmode_notif = pos; 1225 if (calc_crc) 1226 crc = crc32_be(crc, pos - 2, elen + 2); 1227 break; 1228 } 1229 elem_parse_failed = true; 1230 break; 1231 case WLAN_EID_MESH_ID: 1232 elems->mesh_id = pos; 1233 elems->mesh_id_len = elen; 1234 break; 1235 case WLAN_EID_MESH_CONFIG: 1236 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1237 elems->mesh_config = (void *)pos; 1238 else 1239 elem_parse_failed = true; 1240 break; 1241 case WLAN_EID_PEER_MGMT: 1242 elems->peering = pos; 1243 elems->peering_len = elen; 1244 break; 1245 case WLAN_EID_MESH_AWAKE_WINDOW: 1246 if (elen >= 2) 1247 elems->awake_window = (void *)pos; 1248 break; 1249 case WLAN_EID_PREQ: 1250 elems->preq = pos; 1251 elems->preq_len = elen; 1252 break; 1253 case WLAN_EID_PREP: 1254 elems->prep = pos; 1255 elems->prep_len = elen; 1256 break; 1257 case WLAN_EID_PERR: 1258 elems->perr = pos; 1259 elems->perr_len = elen; 1260 break; 1261 case WLAN_EID_RANN: 1262 if (elen >= sizeof(struct ieee80211_rann_ie)) 1263 elems->rann = (void *)pos; 1264 else 1265 elem_parse_failed = true; 1266 break; 1267 case WLAN_EID_CHANNEL_SWITCH: 1268 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1269 elem_parse_failed = true; 1270 break; 1271 } 1272 elems->ch_switch_ie = (void *)pos; 1273 break; 1274 case WLAN_EID_EXT_CHANSWITCH_ANN: 1275 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1276 elem_parse_failed = true; 1277 break; 1278 } 1279 elems->ext_chansw_ie = (void *)pos; 1280 break; 1281 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1282 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1283 elem_parse_failed = true; 1284 break; 1285 } 1286 elems->sec_chan_offs = (void *)pos; 1287 break; 1288 case WLAN_EID_CHAN_SWITCH_PARAM: 1289 if (elen < 1290 sizeof(*elems->mesh_chansw_params_ie)) { 1291 elem_parse_failed = true; 1292 break; 1293 } 1294 elems->mesh_chansw_params_ie = (void *)pos; 1295 break; 1296 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1297 if (!params->action || 1298 elen < sizeof(*elems->wide_bw_chansw_ie)) { 1299 elem_parse_failed = true; 1300 break; 1301 } 1302 elems->wide_bw_chansw_ie = (void *)pos; 1303 break; 1304 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1305 if (params->action) { 1306 elem_parse_failed = true; 1307 break; 1308 } 1309 /* 1310 * This is a bit tricky, but as we only care about 1311 * the wide bandwidth channel switch element, so 1312 * just parse it out manually. 1313 */ 1314 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1315 pos, elen); 1316 if (ie) { 1317 if (ie[1] >= sizeof(*elems->wide_bw_chansw_ie)) 1318 elems->wide_bw_chansw_ie = 1319 (void *)(ie + 2); 1320 else 1321 elem_parse_failed = true; 1322 } 1323 break; 1324 case WLAN_EID_COUNTRY: 1325 elems->country_elem = pos; 1326 elems->country_elem_len = elen; 1327 break; 1328 case WLAN_EID_PWR_CONSTRAINT: 1329 if (elen != 1) { 1330 elem_parse_failed = true; 1331 break; 1332 } 1333 elems->pwr_constr_elem = pos; 1334 break; 1335 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1336 /* Lots of different options exist, but we only care 1337 * about the Dynamic Transmit Power Control element. 1338 * First check for the Cisco OUI, then for the DTPC 1339 * tag (0x00). 1340 */ 1341 if (elen < 4) { 1342 elem_parse_failed = true; 1343 break; 1344 } 1345 1346 if (pos[0] != 0x00 || pos[1] != 0x40 || 1347 pos[2] != 0x96 || pos[3] != 0x00) 1348 break; 1349 1350 if (elen != 6) { 1351 elem_parse_failed = true; 1352 break; 1353 } 1354 1355 if (calc_crc) 1356 crc = crc32_be(crc, pos - 2, elen + 2); 1357 1358 elems->cisco_dtpc_elem = pos; 1359 break; 1360 case WLAN_EID_ADDBA_EXT: 1361 if (elen < sizeof(struct ieee80211_addba_ext_ie)) { 1362 elem_parse_failed = true; 1363 break; 1364 } 1365 elems->addba_ext_ie = (void *)pos; 1366 break; 1367 case WLAN_EID_TIMEOUT_INTERVAL: 1368 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1369 elems->timeout_int = (void *)pos; 1370 else 1371 elem_parse_failed = true; 1372 break; 1373 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1374 if (elen >= sizeof(*elems->max_idle_period_ie)) 1375 elems->max_idle_period_ie = (void *)pos; 1376 break; 1377 case WLAN_EID_RSNX: 1378 elems->rsnx = pos; 1379 elems->rsnx_len = elen; 1380 break; 1381 case WLAN_EID_TX_POWER_ENVELOPE: 1382 if (elen < 1 || 1383 elen > sizeof(struct ieee80211_tx_pwr_env)) 1384 break; 1385 1386 if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env)) 1387 break; 1388 1389 elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos; 1390 elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen; 1391 elems->tx_pwr_env_num++; 1392 break; 1393 case WLAN_EID_EXTENSION: 1394 ieee80211_parse_extension_element(calc_crc ? 1395 &crc : NULL, 1396 elem, elems, params); 1397 break; 1398 case WLAN_EID_S1G_CAPABILITIES: 1399 if (elen >= sizeof(*elems->s1g_capab)) 1400 elems->s1g_capab = (void *)pos; 1401 else 1402 elem_parse_failed = true; 1403 break; 1404 case WLAN_EID_S1G_OPERATION: 1405 if (elen == sizeof(*elems->s1g_oper)) 1406 elems->s1g_oper = (void *)pos; 1407 else 1408 elem_parse_failed = true; 1409 break; 1410 case WLAN_EID_S1G_BCN_COMPAT: 1411 if (elen == sizeof(*elems->s1g_bcn_compat)) 1412 elems->s1g_bcn_compat = (void *)pos; 1413 else 1414 elem_parse_failed = true; 1415 break; 1416 case WLAN_EID_AID_RESPONSE: 1417 if (elen == sizeof(struct ieee80211_aid_response_ie)) 1418 elems->aid_resp = (void *)pos; 1419 else 1420 elem_parse_failed = true; 1421 break; 1422 default: 1423 break; 1424 } 1425 1426 if (elem_parse_failed) 1427 elems->parse_error = true; 1428 else 1429 __set_bit(id, seen_elems); 1430 } 1431 1432 if (!for_each_element_completed(elem, params->start, params->len)) 1433 elems->parse_error = true; 1434 1435 return crc; 1436 } 1437 1438 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1439 struct ieee802_11_elems *elems, 1440 struct cfg80211_bss *bss, 1441 u8 *nontransmitted_profile) 1442 { 1443 const struct element *elem, *sub; 1444 size_t profile_len = 0; 1445 bool found = false; 1446 1447 if (!bss || !bss->transmitted_bss) 1448 return profile_len; 1449 1450 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1451 if (elem->datalen < 2) 1452 continue; 1453 if (elem->data[0] < 1 || elem->data[0] > 8) 1454 continue; 1455 1456 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1457 u8 new_bssid[ETH_ALEN]; 1458 const u8 *index; 1459 1460 if (sub->id != 0 || sub->datalen < 4) { 1461 /* not a valid BSS profile */ 1462 continue; 1463 } 1464 1465 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1466 sub->data[1] != 2) { 1467 /* The first element of the 1468 * Nontransmitted BSSID Profile is not 1469 * the Nontransmitted BSSID Capability 1470 * element. 1471 */ 1472 continue; 1473 } 1474 1475 memset(nontransmitted_profile, 0, len); 1476 profile_len = cfg80211_merge_profile(start, len, 1477 elem, 1478 sub, 1479 nontransmitted_profile, 1480 len); 1481 1482 /* found a Nontransmitted BSSID Profile */ 1483 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1484 nontransmitted_profile, 1485 profile_len); 1486 if (!index || index[1] < 1 || index[2] == 0) { 1487 /* Invalid MBSSID Index element */ 1488 continue; 1489 } 1490 1491 cfg80211_gen_new_bssid(bss->transmitted_bss->bssid, 1492 elem->data[0], 1493 index[2], 1494 new_bssid); 1495 if (ether_addr_equal(new_bssid, bss->bssid)) { 1496 found = true; 1497 elems->bssid_index_len = index[1]; 1498 elems->bssid_index = (void *)&index[2]; 1499 break; 1500 } 1501 } 1502 } 1503 1504 return found ? profile_len : 0; 1505 } 1506 1507 static void ieee80211_defragment_element(struct ieee802_11_elems *elems, 1508 void **elem_ptr, size_t *len, 1509 size_t total_len, u8 frag_id) 1510 { 1511 u8 *data = *elem_ptr, *pos, *start; 1512 const struct element *elem; 1513 1514 /* 1515 * Since 'data' points to the data of the element, not the element 1516 * itself, allow 254 in case it was an extended element where the 1517 * extended ID isn't part of the data we see here and thus not part of 1518 * 'len' either. 1519 */ 1520 if (!data || (*len != 254 && *len != 255)) 1521 return; 1522 1523 start = elems->scratch_pos; 1524 1525 if (WARN_ON(*len > (elems->scratch + elems->scratch_len - 1526 elems->scratch_pos))) 1527 return; 1528 1529 memcpy(elems->scratch_pos, data, *len); 1530 elems->scratch_pos += *len; 1531 1532 pos = data + *len; 1533 total_len -= *len; 1534 for_each_element(elem, pos, total_len) { 1535 if (elem->id != frag_id) 1536 break; 1537 1538 if (WARN_ON(elem->datalen > 1539 (elems->scratch + elems->scratch_len - 1540 elems->scratch_pos))) 1541 return; 1542 1543 memcpy(elems->scratch_pos, elem->data, elem->datalen); 1544 elems->scratch_pos += elem->datalen; 1545 1546 *len += elem->datalen; 1547 } 1548 1549 *elem_ptr = start; 1550 } 1551 1552 static void ieee80211_mle_get_sta_prof(struct ieee802_11_elems *elems, 1553 u8 link_id) 1554 { 1555 const struct ieee80211_multi_link_elem *ml = elems->multi_link; 1556 size_t ml_len = elems->multi_link_len; 1557 const struct element *sub; 1558 1559 if (!ml || !ml_len) 1560 return; 1561 1562 if (le16_get_bits(ml->control, IEEE80211_ML_CONTROL_TYPE) != 1563 IEEE80211_ML_CONTROL_TYPE_BASIC) 1564 return; 1565 1566 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 1567 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 1568 u16 control; 1569 1570 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 1571 continue; 1572 1573 if (!ieee80211_mle_sta_prof_size_ok(sub->data, sub->datalen)) 1574 return; 1575 1576 control = le16_to_cpu(prof->control); 1577 1578 if (link_id != u16_get_bits(control, 1579 IEEE80211_MLE_STA_CONTROL_LINK_ID)) 1580 continue; 1581 1582 if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE)) 1583 return; 1584 1585 elems->prof = prof; 1586 elems->sta_prof_len = sub->datalen; 1587 1588 /* the sub element can be fragmented */ 1589 ieee80211_defragment_element(elems, (void **)&elems->prof, 1590 &elems->sta_prof_len, 1591 ml_len - (sub->data - (u8 *)ml), 1592 IEEE80211_MLE_SUBELEM_FRAGMENT); 1593 return; 1594 } 1595 } 1596 1597 static void ieee80211_mle_parse_link(struct ieee802_11_elems *elems, 1598 struct ieee80211_elems_parse_params *params) 1599 { 1600 struct ieee80211_mle_per_sta_profile *prof; 1601 struct ieee80211_elems_parse_params sub = { 1602 .action = params->action, 1603 .from_ap = params->from_ap, 1604 .link_id = -1, 1605 }; 1606 const struct element *non_inherit = NULL; 1607 const u8 *end; 1608 1609 if (params->link_id == -1) 1610 return; 1611 1612 ieee80211_defragment_element(elems, (void **)&elems->multi_link, 1613 &elems->multi_link_len, 1614 elems->total_len - ((u8 *)elems->multi_link - 1615 elems->ie_start), 1616 WLAN_EID_FRAGMENT); 1617 1618 ieee80211_mle_get_sta_prof(elems, params->link_id); 1619 prof = elems->prof; 1620 1621 if (!prof) 1622 return; 1623 1624 /* check if we have the 4 bytes for the fixed part in assoc response */ 1625 if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) { 1626 elems->prof = NULL; 1627 elems->sta_prof_len = 0; 1628 return; 1629 } 1630 1631 /* 1632 * Skip the capability information and the status code that are expected 1633 * as part of the station profile in association response frames. Note 1634 * the -1 is because the 'sta_info_len' is accounted to as part of the 1635 * per-STA profile, but not part of the 'u8 variable[]' portion. 1636 */ 1637 sub.start = prof->variable + prof->sta_info_len - 1 + 4; 1638 end = (const u8 *)prof + elems->sta_prof_len; 1639 sub.len = end - sub.start; 1640 1641 non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1642 sub.start, sub.len); 1643 _ieee802_11_parse_elems_full(&sub, elems, non_inherit); 1644 } 1645 1646 struct ieee802_11_elems * 1647 ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params) 1648 { 1649 struct ieee802_11_elems *elems; 1650 const struct element *non_inherit = NULL; 1651 u8 *nontransmitted_profile; 1652 int nontransmitted_profile_len = 0; 1653 size_t scratch_len = params->scratch_len ?: 3 * params->len; 1654 1655 elems = kzalloc(sizeof(*elems) + scratch_len, GFP_ATOMIC); 1656 if (!elems) 1657 return NULL; 1658 elems->ie_start = params->start; 1659 elems->total_len = params->len; 1660 elems->scratch_len = scratch_len; 1661 elems->scratch_pos = elems->scratch; 1662 1663 nontransmitted_profile = elems->scratch_pos; 1664 nontransmitted_profile_len = 1665 ieee802_11_find_bssid_profile(params->start, params->len, 1666 elems, params->bss, 1667 nontransmitted_profile); 1668 elems->scratch_pos += nontransmitted_profile_len; 1669 elems->scratch_len -= nontransmitted_profile_len; 1670 non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1671 nontransmitted_profile, 1672 nontransmitted_profile_len); 1673 1674 elems->crc = _ieee802_11_parse_elems_full(params, elems, non_inherit); 1675 1676 /* Override with nontransmitted profile, if found */ 1677 if (nontransmitted_profile_len) { 1678 struct ieee80211_elems_parse_params sub = { 1679 .start = nontransmitted_profile, 1680 .len = nontransmitted_profile_len, 1681 .action = params->action, 1682 .link_id = params->link_id, 1683 }; 1684 1685 _ieee802_11_parse_elems_full(&sub, elems, NULL); 1686 } 1687 1688 ieee80211_mle_parse_link(elems, params); 1689 1690 if (elems->tim && !elems->parse_error) { 1691 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1692 1693 elems->dtim_period = tim_ie->dtim_period; 1694 elems->dtim_count = tim_ie->dtim_count; 1695 } 1696 1697 /* Override DTIM period and count if needed */ 1698 if (elems->bssid_index && 1699 elems->bssid_index_len >= 1700 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1701 elems->dtim_period = elems->bssid_index->dtim_period; 1702 1703 if (elems->bssid_index && 1704 elems->bssid_index_len >= 1705 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1706 elems->dtim_count = elems->bssid_index->dtim_count; 1707 1708 return elems; 1709 } 1710 1711 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1712 struct ieee80211_tx_queue_params 1713 *qparam, int ac) 1714 { 1715 struct ieee80211_chanctx_conf *chanctx_conf; 1716 const struct ieee80211_reg_rule *rrule; 1717 const struct ieee80211_wmm_ac *wmm_ac; 1718 u16 center_freq = 0; 1719 1720 if (sdata->vif.type != NL80211_IFTYPE_AP && 1721 sdata->vif.type != NL80211_IFTYPE_STATION) 1722 return; 1723 1724 rcu_read_lock(); 1725 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 1726 if (chanctx_conf) 1727 center_freq = chanctx_conf->def.chan->center_freq; 1728 1729 if (!center_freq) { 1730 rcu_read_unlock(); 1731 return; 1732 } 1733 1734 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1735 1736 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1737 rcu_read_unlock(); 1738 return; 1739 } 1740 1741 if (sdata->vif.type == NL80211_IFTYPE_AP) 1742 wmm_ac = &rrule->wmm_rule.ap[ac]; 1743 else 1744 wmm_ac = &rrule->wmm_rule.client[ac]; 1745 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1746 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1747 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1748 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1749 rcu_read_unlock(); 1750 } 1751 1752 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1753 bool bss_notify, bool enable_qos) 1754 { 1755 struct ieee80211_sub_if_data *sdata = link->sdata; 1756 struct ieee80211_local *local = sdata->local; 1757 struct ieee80211_tx_queue_params qparam; 1758 struct ieee80211_chanctx_conf *chanctx_conf; 1759 int ac; 1760 bool use_11b; 1761 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1762 int aCWmin, aCWmax; 1763 1764 if (!local->ops->conf_tx) 1765 return; 1766 1767 if (local->hw.queues < IEEE80211_NUM_ACS) 1768 return; 1769 1770 memset(&qparam, 0, sizeof(qparam)); 1771 1772 rcu_read_lock(); 1773 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1774 use_11b = (chanctx_conf && 1775 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1776 !link->operating_11g_mode; 1777 rcu_read_unlock(); 1778 1779 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1780 1781 /* Set defaults according to 802.11-2007 Table 7-37 */ 1782 aCWmax = 1023; 1783 if (use_11b) 1784 aCWmin = 31; 1785 else 1786 aCWmin = 15; 1787 1788 /* Confiure old 802.11b/g medium access rules. */ 1789 qparam.cw_max = aCWmax; 1790 qparam.cw_min = aCWmin; 1791 qparam.txop = 0; 1792 qparam.aifs = 2; 1793 1794 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1795 /* Update if QoS is enabled. */ 1796 if (enable_qos) { 1797 switch (ac) { 1798 case IEEE80211_AC_BK: 1799 qparam.cw_max = aCWmax; 1800 qparam.cw_min = aCWmin; 1801 qparam.txop = 0; 1802 if (is_ocb) 1803 qparam.aifs = 9; 1804 else 1805 qparam.aifs = 7; 1806 break; 1807 /* never happens but let's not leave undefined */ 1808 default: 1809 case IEEE80211_AC_BE: 1810 qparam.cw_max = aCWmax; 1811 qparam.cw_min = aCWmin; 1812 qparam.txop = 0; 1813 if (is_ocb) 1814 qparam.aifs = 6; 1815 else 1816 qparam.aifs = 3; 1817 break; 1818 case IEEE80211_AC_VI: 1819 qparam.cw_max = aCWmin; 1820 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1821 if (is_ocb) 1822 qparam.txop = 0; 1823 else if (use_11b) 1824 qparam.txop = 6016/32; 1825 else 1826 qparam.txop = 3008/32; 1827 1828 if (is_ocb) 1829 qparam.aifs = 3; 1830 else 1831 qparam.aifs = 2; 1832 break; 1833 case IEEE80211_AC_VO: 1834 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1835 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1836 if (is_ocb) 1837 qparam.txop = 0; 1838 else if (use_11b) 1839 qparam.txop = 3264/32; 1840 else 1841 qparam.txop = 1504/32; 1842 qparam.aifs = 2; 1843 break; 1844 } 1845 } 1846 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1847 1848 qparam.uapsd = false; 1849 1850 link->tx_conf[ac] = qparam; 1851 drv_conf_tx(local, link, ac, &qparam); 1852 } 1853 1854 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1855 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1856 sdata->vif.type != NL80211_IFTYPE_NAN) { 1857 link->conf->qos = enable_qos; 1858 if (bss_notify) 1859 ieee80211_link_info_change_notify(sdata, link, 1860 BSS_CHANGED_QOS); 1861 } 1862 } 1863 1864 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1865 u16 transaction, u16 auth_alg, u16 status, 1866 const u8 *extra, size_t extra_len, const u8 *da, 1867 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1868 u32 tx_flags) 1869 { 1870 struct ieee80211_local *local = sdata->local; 1871 struct sk_buff *skb; 1872 struct ieee80211_mgmt *mgmt; 1873 bool multi_link = sdata->vif.valid_links; 1874 struct { 1875 u8 id; 1876 u8 len; 1877 u8 ext_id; 1878 struct ieee80211_multi_link_elem ml; 1879 struct ieee80211_mle_basic_common_info basic; 1880 } __packed mle = { 1881 .id = WLAN_EID_EXTENSION, 1882 .len = sizeof(mle) - 2, 1883 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1884 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1885 .basic.len = sizeof(mle.basic), 1886 }; 1887 int err; 1888 1889 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1890 1891 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1892 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1893 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1894 multi_link * sizeof(mle)); 1895 if (!skb) 1896 return; 1897 1898 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1899 1900 mgmt = skb_put_zero(skb, 24 + 6); 1901 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1902 IEEE80211_STYPE_AUTH); 1903 memcpy(mgmt->da, da, ETH_ALEN); 1904 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1905 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1906 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1907 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1908 mgmt->u.auth.status_code = cpu_to_le16(status); 1909 if (extra) 1910 skb_put_data(skb, extra, extra_len); 1911 if (multi_link) 1912 skb_put_data(skb, &mle, sizeof(mle)); 1913 1914 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1915 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1916 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1917 if (WARN_ON(err)) { 1918 kfree_skb(skb); 1919 return; 1920 } 1921 } 1922 1923 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1924 tx_flags; 1925 ieee80211_tx_skb(sdata, skb); 1926 } 1927 1928 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1929 const u8 *da, const u8 *bssid, 1930 u16 stype, u16 reason, 1931 bool send_frame, u8 *frame_buf) 1932 { 1933 struct ieee80211_local *local = sdata->local; 1934 struct sk_buff *skb; 1935 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1936 1937 /* build frame */ 1938 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1939 mgmt->duration = 0; /* initialize only */ 1940 mgmt->seq_ctrl = 0; /* initialize only */ 1941 memcpy(mgmt->da, da, ETH_ALEN); 1942 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1943 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1944 /* u.deauth.reason_code == u.disassoc.reason_code */ 1945 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1946 1947 if (send_frame) { 1948 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1949 IEEE80211_DEAUTH_FRAME_LEN); 1950 if (!skb) 1951 return; 1952 1953 skb_reserve(skb, local->hw.extra_tx_headroom); 1954 1955 /* copy in frame */ 1956 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1957 1958 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1959 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1960 IEEE80211_SKB_CB(skb)->flags |= 1961 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1962 1963 ieee80211_tx_skb(sdata, skb); 1964 } 1965 } 1966 1967 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end) 1968 { 1969 if ((end - pos) < 5) 1970 return pos; 1971 1972 *pos++ = WLAN_EID_EXTENSION; 1973 *pos++ = 1 + sizeof(cap); 1974 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA; 1975 memcpy(pos, &cap, sizeof(cap)); 1976 1977 return pos + 2; 1978 } 1979 1980 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata, 1981 u8 *buffer, size_t buffer_len, 1982 const u8 *ie, size_t ie_len, 1983 enum nl80211_band band, 1984 u32 rate_mask, 1985 struct cfg80211_chan_def *chandef, 1986 size_t *offset, u32 flags) 1987 { 1988 struct ieee80211_local *local = sdata->local; 1989 struct ieee80211_supported_band *sband; 1990 const struct ieee80211_sta_he_cap *he_cap; 1991 const struct ieee80211_sta_eht_cap *eht_cap; 1992 u8 *pos = buffer, *end = buffer + buffer_len; 1993 size_t noffset; 1994 int supp_rates_len, i; 1995 u8 rates[32]; 1996 int num_rates; 1997 int ext_rates_len; 1998 int shift; 1999 u32 rate_flags; 2000 bool have_80mhz = false; 2001 2002 *offset = 0; 2003 2004 sband = local->hw.wiphy->bands[band]; 2005 if (WARN_ON_ONCE(!sband)) 2006 return 0; 2007 2008 rate_flags = ieee80211_chandef_rate_flags(chandef); 2009 shift = ieee80211_chandef_get_shift(chandef); 2010 2011 num_rates = 0; 2012 for (i = 0; i < sband->n_bitrates; i++) { 2013 if ((BIT(i) & rate_mask) == 0) 2014 continue; /* skip rate */ 2015 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2016 continue; 2017 2018 rates[num_rates++] = 2019 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 2020 (1 << shift) * 5); 2021 } 2022 2023 supp_rates_len = min_t(int, num_rates, 8); 2024 2025 if (end - pos < 2 + supp_rates_len) 2026 goto out_err; 2027 *pos++ = WLAN_EID_SUPP_RATES; 2028 *pos++ = supp_rates_len; 2029 memcpy(pos, rates, supp_rates_len); 2030 pos += supp_rates_len; 2031 2032 /* insert "request information" if in custom IEs */ 2033 if (ie && ie_len) { 2034 static const u8 before_extrates[] = { 2035 WLAN_EID_SSID, 2036 WLAN_EID_SUPP_RATES, 2037 WLAN_EID_REQUEST, 2038 }; 2039 noffset = ieee80211_ie_split(ie, ie_len, 2040 before_extrates, 2041 ARRAY_SIZE(before_extrates), 2042 *offset); 2043 if (end - pos < noffset - *offset) 2044 goto out_err; 2045 memcpy(pos, ie + *offset, noffset - *offset); 2046 pos += noffset - *offset; 2047 *offset = noffset; 2048 } 2049 2050 ext_rates_len = num_rates - supp_rates_len; 2051 if (ext_rates_len > 0) { 2052 if (end - pos < 2 + ext_rates_len) 2053 goto out_err; 2054 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2055 *pos++ = ext_rates_len; 2056 memcpy(pos, rates + supp_rates_len, ext_rates_len); 2057 pos += ext_rates_len; 2058 } 2059 2060 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 2061 if (end - pos < 3) 2062 goto out_err; 2063 *pos++ = WLAN_EID_DS_PARAMS; 2064 *pos++ = 1; 2065 *pos++ = ieee80211_frequency_to_channel( 2066 chandef->chan->center_freq); 2067 } 2068 2069 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 2070 goto done; 2071 2072 /* insert custom IEs that go before HT */ 2073 if (ie && ie_len) { 2074 static const u8 before_ht[] = { 2075 /* 2076 * no need to list the ones split off already 2077 * (or generated here) 2078 */ 2079 WLAN_EID_DS_PARAMS, 2080 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 2081 }; 2082 noffset = ieee80211_ie_split(ie, ie_len, 2083 before_ht, ARRAY_SIZE(before_ht), 2084 *offset); 2085 if (end - pos < noffset - *offset) 2086 goto out_err; 2087 memcpy(pos, ie + *offset, noffset - *offset); 2088 pos += noffset - *offset; 2089 *offset = noffset; 2090 } 2091 2092 if (sband->ht_cap.ht_supported) { 2093 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 2094 goto out_err; 2095 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 2096 sband->ht_cap.cap); 2097 } 2098 2099 /* insert custom IEs that go before VHT */ 2100 if (ie && ie_len) { 2101 static const u8 before_vht[] = { 2102 /* 2103 * no need to list the ones split off already 2104 * (or generated here) 2105 */ 2106 WLAN_EID_BSS_COEX_2040, 2107 WLAN_EID_EXT_CAPABILITY, 2108 WLAN_EID_SSID_LIST, 2109 WLAN_EID_CHANNEL_USAGE, 2110 WLAN_EID_INTERWORKING, 2111 WLAN_EID_MESH_ID, 2112 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 2113 }; 2114 noffset = ieee80211_ie_split(ie, ie_len, 2115 before_vht, ARRAY_SIZE(before_vht), 2116 *offset); 2117 if (end - pos < noffset - *offset) 2118 goto out_err; 2119 memcpy(pos, ie + *offset, noffset - *offset); 2120 pos += noffset - *offset; 2121 *offset = noffset; 2122 } 2123 2124 /* Check if any channel in this sband supports at least 80 MHz */ 2125 for (i = 0; i < sband->n_channels; i++) { 2126 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 2127 IEEE80211_CHAN_NO_80MHZ)) 2128 continue; 2129 2130 have_80mhz = true; 2131 break; 2132 } 2133 2134 if (sband->vht_cap.vht_supported && have_80mhz) { 2135 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 2136 goto out_err; 2137 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 2138 sband->vht_cap.cap); 2139 } 2140 2141 /* insert custom IEs that go before HE */ 2142 if (ie && ie_len) { 2143 static const u8 before_he[] = { 2144 /* 2145 * no need to list the ones split off before VHT 2146 * or generated here 2147 */ 2148 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 2149 WLAN_EID_AP_CSN, 2150 /* TODO: add 11ah/11aj/11ak elements */ 2151 }; 2152 noffset = ieee80211_ie_split(ie, ie_len, 2153 before_he, ARRAY_SIZE(before_he), 2154 *offset); 2155 if (end - pos < noffset - *offset) 2156 goto out_err; 2157 memcpy(pos, ie + *offset, noffset - *offset); 2158 pos += noffset - *offset; 2159 *offset = noffset; 2160 } 2161 2162 he_cap = ieee80211_get_he_iftype_cap(sband, 2163 ieee80211_vif_type_p2p(&sdata->vif)); 2164 if (he_cap && 2165 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2166 IEEE80211_CHAN_NO_HE)) { 2167 pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end); 2168 if (!pos) 2169 goto out_err; 2170 } 2171 2172 eht_cap = ieee80211_get_eht_iftype_cap(sband, 2173 ieee80211_vif_type_p2p(&sdata->vif)); 2174 2175 if (eht_cap && 2176 cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 2177 IEEE80211_CHAN_NO_HE | 2178 IEEE80211_CHAN_NO_EHT)) { 2179 pos = ieee80211_ie_build_eht_cap(pos, he_cap, eht_cap, end, 2180 sdata->vif.type == NL80211_IFTYPE_AP); 2181 if (!pos) 2182 goto out_err; 2183 } 2184 2185 if (cfg80211_any_usable_channels(local->hw.wiphy, 2186 BIT(NL80211_BAND_6GHZ), 2187 IEEE80211_CHAN_NO_HE)) { 2188 struct ieee80211_supported_band *sband6; 2189 2190 sband6 = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2191 he_cap = ieee80211_get_he_iftype_cap(sband6, 2192 ieee80211_vif_type_p2p(&sdata->vif)); 2193 2194 if (he_cap) { 2195 enum nl80211_iftype iftype = 2196 ieee80211_vif_type_p2p(&sdata->vif); 2197 __le16 cap = ieee80211_get_he_6ghz_capa(sband6, iftype); 2198 2199 pos = ieee80211_write_he_6ghz_cap(pos, cap, end); 2200 } 2201 } 2202 2203 /* 2204 * If adding more here, adjust code in main.c 2205 * that calculates local->scan_ies_len. 2206 */ 2207 2208 return pos - buffer; 2209 out_err: 2210 WARN_ONCE(1, "not enough space for preq IEs\n"); 2211 done: 2212 return pos - buffer; 2213 } 2214 2215 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 2216 size_t buffer_len, 2217 struct ieee80211_scan_ies *ie_desc, 2218 const u8 *ie, size_t ie_len, 2219 u8 bands_used, u32 *rate_masks, 2220 struct cfg80211_chan_def *chandef, 2221 u32 flags) 2222 { 2223 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 2224 int i; 2225 2226 memset(ie_desc, 0, sizeof(*ie_desc)); 2227 2228 for (i = 0; i < NUM_NL80211_BANDS; i++) { 2229 if (bands_used & BIT(i)) { 2230 pos += ieee80211_build_preq_ies_band(sdata, 2231 buffer + pos, 2232 buffer_len - pos, 2233 ie, ie_len, i, 2234 rate_masks[i], 2235 chandef, 2236 &custom_ie_offset, 2237 flags); 2238 ie_desc->ies[i] = buffer + old_pos; 2239 ie_desc->len[i] = pos - old_pos; 2240 old_pos = pos; 2241 } 2242 } 2243 2244 /* add any remaining custom IEs */ 2245 if (ie && ie_len) { 2246 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 2247 "not enough space for preq custom IEs\n")) 2248 return pos; 2249 memcpy(buffer + pos, ie + custom_ie_offset, 2250 ie_len - custom_ie_offset); 2251 ie_desc->common_ies = buffer + pos; 2252 ie_desc->common_ie_len = ie_len - custom_ie_offset; 2253 pos += ie_len - custom_ie_offset; 2254 } 2255 2256 return pos; 2257 }; 2258 2259 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 2260 const u8 *src, const u8 *dst, 2261 u32 ratemask, 2262 struct ieee80211_channel *chan, 2263 const u8 *ssid, size_t ssid_len, 2264 const u8 *ie, size_t ie_len, 2265 u32 flags) 2266 { 2267 struct ieee80211_local *local = sdata->local; 2268 struct cfg80211_chan_def chandef; 2269 struct sk_buff *skb; 2270 struct ieee80211_mgmt *mgmt; 2271 int ies_len; 2272 u32 rate_masks[NUM_NL80211_BANDS] = {}; 2273 struct ieee80211_scan_ies dummy_ie_desc; 2274 2275 /* 2276 * Do not send DS Channel parameter for directed probe requests 2277 * in order to maximize the chance that we get a response. Some 2278 * badly-behaved APs don't respond when this parameter is included. 2279 */ 2280 chandef.width = sdata->vif.bss_conf.chandef.width; 2281 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 2282 chandef.chan = NULL; 2283 else 2284 chandef.chan = chan; 2285 2286 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 2287 local->scan_ies_len + ie_len); 2288 if (!skb) 2289 return NULL; 2290 2291 rate_masks[chan->band] = ratemask; 2292 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb), 2293 skb_tailroom(skb), &dummy_ie_desc, 2294 ie, ie_len, BIT(chan->band), 2295 rate_masks, &chandef, flags); 2296 skb_put(skb, ies_len); 2297 2298 if (dst) { 2299 mgmt = (struct ieee80211_mgmt *) skb->data; 2300 memcpy(mgmt->da, dst, ETH_ALEN); 2301 memcpy(mgmt->bssid, dst, ETH_ALEN); 2302 } 2303 2304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2305 2306 return skb; 2307 } 2308 2309 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 2310 struct ieee802_11_elems *elems, 2311 enum nl80211_band band, u32 *basic_rates) 2312 { 2313 struct ieee80211_supported_band *sband; 2314 size_t num_rates; 2315 u32 supp_rates, rate_flags; 2316 int i, j, shift; 2317 2318 sband = sdata->local->hw.wiphy->bands[band]; 2319 if (WARN_ON(!sband)) 2320 return 1; 2321 2322 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2323 shift = ieee80211_vif_get_shift(&sdata->vif); 2324 2325 num_rates = sband->n_bitrates; 2326 supp_rates = 0; 2327 for (i = 0; i < elems->supp_rates_len + 2328 elems->ext_supp_rates_len; i++) { 2329 u8 rate = 0; 2330 int own_rate; 2331 bool is_basic; 2332 if (i < elems->supp_rates_len) 2333 rate = elems->supp_rates[i]; 2334 else if (elems->ext_supp_rates) 2335 rate = elems->ext_supp_rates 2336 [i - elems->supp_rates_len]; 2337 own_rate = 5 * (rate & 0x7f); 2338 is_basic = !!(rate & 0x80); 2339 2340 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 2341 continue; 2342 2343 for (j = 0; j < num_rates; j++) { 2344 int brate; 2345 if ((rate_flags & sband->bitrates[j].flags) 2346 != rate_flags) 2347 continue; 2348 2349 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 2350 1 << shift); 2351 2352 if (brate == own_rate) { 2353 supp_rates |= BIT(j); 2354 if (basic_rates && is_basic) 2355 *basic_rates |= BIT(j); 2356 } 2357 } 2358 } 2359 return supp_rates; 2360 } 2361 2362 void ieee80211_stop_device(struct ieee80211_local *local) 2363 { 2364 ieee80211_led_radio(local, false); 2365 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 2366 2367 cancel_work_sync(&local->reconfig_filter); 2368 2369 flush_workqueue(local->workqueue); 2370 drv_stop(local); 2371 } 2372 2373 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 2374 bool aborted) 2375 { 2376 /* It's possible that we don't handle the scan completion in 2377 * time during suspend, so if it's still marked as completed 2378 * here, queue the work and flush it to clean things up. 2379 * Instead of calling the worker function directly here, we 2380 * really queue it to avoid potential races with other flows 2381 * scheduling the same work. 2382 */ 2383 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2384 /* If coming from reconfiguration failure, abort the scan so 2385 * we don't attempt to continue a partial HW scan - which is 2386 * possible otherwise if (e.g.) the 2.4 GHz portion was the 2387 * completed scan, and a 5 GHz portion is still pending. 2388 */ 2389 if (aborted) 2390 set_bit(SCAN_ABORTED, &local->scanning); 2391 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2392 flush_delayed_work(&local->scan_work); 2393 } 2394 } 2395 2396 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 2397 { 2398 struct ieee80211_sub_if_data *sdata; 2399 struct ieee80211_chanctx *ctx; 2400 2401 /* 2402 * We get here if during resume the device can't be restarted properly. 2403 * We might also get here if this happens during HW reset, which is a 2404 * slightly different situation and we need to drop all connections in 2405 * the latter case. 2406 * 2407 * Ask cfg80211 to turn off all interfaces, this will result in more 2408 * warnings but at least we'll then get into a clean stopped state. 2409 */ 2410 2411 local->resuming = false; 2412 local->suspended = false; 2413 local->in_reconfig = false; 2414 2415 ieee80211_flush_completed_scan(local, true); 2416 2417 /* scheduled scan clearly can't be running any more, but tell 2418 * cfg80211 and clear local state 2419 */ 2420 ieee80211_sched_scan_end(local); 2421 2422 list_for_each_entry(sdata, &local->interfaces, list) 2423 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2424 2425 /* Mark channel contexts as not being in the driver any more to avoid 2426 * removing them from the driver during the shutdown process... 2427 */ 2428 mutex_lock(&local->chanctx_mtx); 2429 list_for_each_entry(ctx, &local->chanctx_list, list) 2430 ctx->driver_present = false; 2431 mutex_unlock(&local->chanctx_mtx); 2432 } 2433 2434 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2435 struct ieee80211_sub_if_data *sdata, 2436 struct ieee80211_link_data *link) 2437 { 2438 struct ieee80211_chanctx_conf *conf; 2439 struct ieee80211_chanctx *ctx; 2440 2441 if (!local->use_chanctx) 2442 return; 2443 2444 mutex_lock(&local->chanctx_mtx); 2445 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2446 lockdep_is_held(&local->chanctx_mtx)); 2447 if (conf) { 2448 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2449 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 2450 } 2451 mutex_unlock(&local->chanctx_mtx); 2452 } 2453 2454 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2455 { 2456 struct ieee80211_local *local = sdata->local; 2457 struct sta_info *sta; 2458 2459 /* add STAs back */ 2460 mutex_lock(&local->sta_mtx); 2461 list_for_each_entry(sta, &local->sta_list, list) { 2462 enum ieee80211_sta_state state; 2463 2464 if (!sta->uploaded || sta->sdata != sdata) 2465 continue; 2466 2467 for (state = IEEE80211_STA_NOTEXIST; 2468 state < sta->sta_state; state++) 2469 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2470 state + 1)); 2471 } 2472 mutex_unlock(&local->sta_mtx); 2473 } 2474 2475 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2476 { 2477 struct cfg80211_nan_func *func, **funcs; 2478 int res, id, i = 0; 2479 2480 res = drv_start_nan(sdata->local, sdata, 2481 &sdata->u.nan.conf); 2482 if (WARN_ON(res)) 2483 return res; 2484 2485 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2486 sizeof(*funcs), 2487 GFP_KERNEL); 2488 if (!funcs) 2489 return -ENOMEM; 2490 2491 /* Add all the functions: 2492 * This is a little bit ugly. We need to call a potentially sleeping 2493 * callback for each NAN function, so we can't hold the spinlock. 2494 */ 2495 spin_lock_bh(&sdata->u.nan.func_lock); 2496 2497 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2498 funcs[i++] = func; 2499 2500 spin_unlock_bh(&sdata->u.nan.func_lock); 2501 2502 for (i = 0; funcs[i]; i++) { 2503 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2504 if (WARN_ON(res)) 2505 ieee80211_nan_func_terminated(&sdata->vif, 2506 funcs[i]->instance_id, 2507 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2508 GFP_KERNEL); 2509 } 2510 2511 kfree(funcs); 2512 2513 return 0; 2514 } 2515 2516 int ieee80211_reconfig(struct ieee80211_local *local) 2517 { 2518 struct ieee80211_hw *hw = &local->hw; 2519 struct ieee80211_sub_if_data *sdata; 2520 struct ieee80211_chanctx *ctx; 2521 struct sta_info *sta; 2522 int res, i; 2523 bool reconfig_due_to_wowlan = false; 2524 struct ieee80211_sub_if_data *sched_scan_sdata; 2525 struct cfg80211_sched_scan_request *sched_scan_req; 2526 bool sched_scan_stopped = false; 2527 bool suspended = local->suspended; 2528 bool in_reconfig = false; 2529 2530 /* nothing to do if HW shouldn't run */ 2531 if (!local->open_count) 2532 goto wake_up; 2533 2534 #ifdef CONFIG_PM 2535 if (suspended) 2536 local->resuming = true; 2537 2538 if (local->wowlan) { 2539 /* 2540 * In the wowlan case, both mac80211 and the device 2541 * are functional when the resume op is called, so 2542 * clear local->suspended so the device could operate 2543 * normally (e.g. pass rx frames). 2544 */ 2545 local->suspended = false; 2546 res = drv_resume(local); 2547 local->wowlan = false; 2548 if (res < 0) { 2549 local->resuming = false; 2550 return res; 2551 } 2552 if (res == 0) 2553 goto wake_up; 2554 WARN_ON(res > 1); 2555 /* 2556 * res is 1, which means the driver requested 2557 * to go through a regular reset on wakeup. 2558 * restore local->suspended in this case. 2559 */ 2560 reconfig_due_to_wowlan = true; 2561 local->suspended = true; 2562 } 2563 #endif 2564 2565 /* 2566 * In case of hw_restart during suspend (without wowlan), 2567 * cancel restart work, as we are reconfiguring the device 2568 * anyway. 2569 * Note that restart_work is scheduled on a frozen workqueue, 2570 * so we can't deadlock in this case. 2571 */ 2572 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2573 cancel_work_sync(&local->restart_work); 2574 2575 local->started = false; 2576 2577 /* 2578 * Upon resume hardware can sometimes be goofy due to 2579 * various platform / driver / bus issues, so restarting 2580 * the device may at times not work immediately. Propagate 2581 * the error. 2582 */ 2583 res = drv_start(local); 2584 if (res) { 2585 if (suspended) 2586 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2587 else 2588 WARN(1, "Hardware became unavailable during restart.\n"); 2589 ieee80211_handle_reconfig_failure(local); 2590 return res; 2591 } 2592 2593 /* setup fragmentation threshold */ 2594 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2595 2596 /* setup RTS threshold */ 2597 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2598 2599 /* reset coverage class */ 2600 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2601 2602 ieee80211_led_radio(local, true); 2603 ieee80211_mod_tpt_led_trig(local, 2604 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2605 2606 /* add interfaces */ 2607 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2608 if (sdata) { 2609 /* in HW restart it exists already */ 2610 WARN_ON(local->resuming); 2611 res = drv_add_interface(local, sdata); 2612 if (WARN_ON(res)) { 2613 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2614 synchronize_net(); 2615 kfree(sdata); 2616 } 2617 } 2618 2619 list_for_each_entry(sdata, &local->interfaces, list) { 2620 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2621 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2622 ieee80211_sdata_running(sdata)) { 2623 res = drv_add_interface(local, sdata); 2624 if (WARN_ON(res)) 2625 break; 2626 } 2627 } 2628 2629 /* If adding any of the interfaces failed above, roll back and 2630 * report failure. 2631 */ 2632 if (res) { 2633 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2634 list) 2635 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2636 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2637 ieee80211_sdata_running(sdata)) 2638 drv_remove_interface(local, sdata); 2639 ieee80211_handle_reconfig_failure(local); 2640 return res; 2641 } 2642 2643 /* add channel contexts */ 2644 if (local->use_chanctx) { 2645 mutex_lock(&local->chanctx_mtx); 2646 list_for_each_entry(ctx, &local->chanctx_list, list) 2647 if (ctx->replace_state != 2648 IEEE80211_CHANCTX_REPLACES_OTHER) 2649 WARN_ON(drv_add_chanctx(local, ctx)); 2650 mutex_unlock(&local->chanctx_mtx); 2651 2652 sdata = wiphy_dereference(local->hw.wiphy, 2653 local->monitor_sdata); 2654 if (sdata && ieee80211_sdata_running(sdata)) 2655 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2656 } 2657 2658 /* reconfigure hardware */ 2659 ieee80211_hw_config(local, ~0); 2660 2661 ieee80211_configure_filter(local); 2662 2663 /* Finally also reconfigure all the BSS information */ 2664 list_for_each_entry(sdata, &local->interfaces, list) { 2665 unsigned int link_id; 2666 u32 changed; 2667 2668 if (!ieee80211_sdata_running(sdata)) 2669 continue; 2670 2671 sdata_lock(sdata); 2672 for (link_id = 0; 2673 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2674 link_id++) { 2675 struct ieee80211_link_data *link; 2676 2677 link = sdata_dereference(sdata->link[link_id], sdata); 2678 if (link) 2679 ieee80211_assign_chanctx(local, sdata, link); 2680 } 2681 2682 switch (sdata->vif.type) { 2683 case NL80211_IFTYPE_AP_VLAN: 2684 case NL80211_IFTYPE_MONITOR: 2685 break; 2686 case NL80211_IFTYPE_ADHOC: 2687 if (sdata->vif.cfg.ibss_joined) 2688 WARN_ON(drv_join_ibss(local, sdata)); 2689 fallthrough; 2690 default: 2691 ieee80211_reconfig_stations(sdata); 2692 fallthrough; 2693 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2694 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2695 drv_conf_tx(local, &sdata->deflink, i, 2696 &sdata->deflink.tx_conf[i]); 2697 break; 2698 } 2699 sdata_unlock(sdata); 2700 2701 /* common change flags for all interface types */ 2702 changed = BSS_CHANGED_ERP_CTS_PROT | 2703 BSS_CHANGED_ERP_PREAMBLE | 2704 BSS_CHANGED_ERP_SLOT | 2705 BSS_CHANGED_HT | 2706 BSS_CHANGED_BASIC_RATES | 2707 BSS_CHANGED_BEACON_INT | 2708 BSS_CHANGED_BSSID | 2709 BSS_CHANGED_CQM | 2710 BSS_CHANGED_QOS | 2711 BSS_CHANGED_IDLE | 2712 BSS_CHANGED_TXPOWER | 2713 BSS_CHANGED_MCAST_RATE; 2714 2715 if (sdata->vif.bss_conf.mu_mimo_owner) 2716 changed |= BSS_CHANGED_MU_GROUPS; 2717 2718 switch (sdata->vif.type) { 2719 case NL80211_IFTYPE_STATION: 2720 changed |= BSS_CHANGED_ASSOC | 2721 BSS_CHANGED_ARP_FILTER | 2722 BSS_CHANGED_PS; 2723 2724 /* Re-send beacon info report to the driver */ 2725 if (sdata->deflink.u.mgd.have_beacon) 2726 changed |= BSS_CHANGED_BEACON_INFO; 2727 2728 if (sdata->vif.bss_conf.max_idle_period || 2729 sdata->vif.bss_conf.protected_keep_alive) 2730 changed |= BSS_CHANGED_KEEP_ALIVE; 2731 2732 sdata_lock(sdata); 2733 ieee80211_bss_info_change_notify(sdata, changed); 2734 sdata_unlock(sdata); 2735 break; 2736 case NL80211_IFTYPE_OCB: 2737 changed |= BSS_CHANGED_OCB; 2738 ieee80211_bss_info_change_notify(sdata, changed); 2739 break; 2740 case NL80211_IFTYPE_ADHOC: 2741 changed |= BSS_CHANGED_IBSS; 2742 fallthrough; 2743 case NL80211_IFTYPE_AP: 2744 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2745 2746 if (sdata->vif.bss_conf.ftm_responder == 1 && 2747 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2748 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2749 changed |= BSS_CHANGED_FTM_RESPONDER; 2750 2751 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2752 changed |= BSS_CHANGED_AP_PROBE_RESP; 2753 2754 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2755 drv_start_ap(local, sdata, 2756 sdata->deflink.conf); 2757 } 2758 fallthrough; 2759 case NL80211_IFTYPE_MESH_POINT: 2760 if (sdata->vif.bss_conf.enable_beacon) { 2761 changed |= BSS_CHANGED_BEACON | 2762 BSS_CHANGED_BEACON_ENABLED; 2763 ieee80211_bss_info_change_notify(sdata, changed); 2764 } 2765 break; 2766 case NL80211_IFTYPE_NAN: 2767 res = ieee80211_reconfig_nan(sdata); 2768 if (res < 0) { 2769 ieee80211_handle_reconfig_failure(local); 2770 return res; 2771 } 2772 break; 2773 case NL80211_IFTYPE_AP_VLAN: 2774 case NL80211_IFTYPE_MONITOR: 2775 case NL80211_IFTYPE_P2P_DEVICE: 2776 /* nothing to do */ 2777 break; 2778 case NL80211_IFTYPE_UNSPECIFIED: 2779 case NUM_NL80211_IFTYPES: 2780 case NL80211_IFTYPE_P2P_CLIENT: 2781 case NL80211_IFTYPE_P2P_GO: 2782 case NL80211_IFTYPE_WDS: 2783 WARN_ON(1); 2784 break; 2785 } 2786 } 2787 2788 ieee80211_recalc_ps(local); 2789 2790 /* 2791 * The sta might be in psm against the ap (e.g. because 2792 * this was the state before a hw restart), so we 2793 * explicitly send a null packet in order to make sure 2794 * it'll sync against the ap (and get out of psm). 2795 */ 2796 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2797 list_for_each_entry(sdata, &local->interfaces, list) { 2798 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2799 continue; 2800 if (!sdata->u.mgd.associated) 2801 continue; 2802 2803 ieee80211_send_nullfunc(local, sdata, false); 2804 } 2805 } 2806 2807 /* APs are now beaconing, add back stations */ 2808 list_for_each_entry(sdata, &local->interfaces, list) { 2809 if (!ieee80211_sdata_running(sdata)) 2810 continue; 2811 2812 sdata_lock(sdata); 2813 switch (sdata->vif.type) { 2814 case NL80211_IFTYPE_AP_VLAN: 2815 case NL80211_IFTYPE_AP: 2816 ieee80211_reconfig_stations(sdata); 2817 break; 2818 default: 2819 break; 2820 } 2821 sdata_unlock(sdata); 2822 } 2823 2824 /* add back keys */ 2825 list_for_each_entry(sdata, &local->interfaces, list) 2826 ieee80211_reenable_keys(sdata); 2827 2828 /* Reconfigure sched scan if it was interrupted by FW restart */ 2829 mutex_lock(&local->mtx); 2830 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2831 lockdep_is_held(&local->mtx)); 2832 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2833 lockdep_is_held(&local->mtx)); 2834 if (sched_scan_sdata && sched_scan_req) 2835 /* 2836 * Sched scan stopped, but we don't want to report it. Instead, 2837 * we're trying to reschedule. However, if more than one scan 2838 * plan was set, we cannot reschedule since we don't know which 2839 * scan plan was currently running (and some scan plans may have 2840 * already finished). 2841 */ 2842 if (sched_scan_req->n_scan_plans > 1 || 2843 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2844 sched_scan_req)) { 2845 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2846 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2847 sched_scan_stopped = true; 2848 } 2849 mutex_unlock(&local->mtx); 2850 2851 if (sched_scan_stopped) 2852 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2853 2854 wake_up: 2855 2856 if (local->monitors == local->open_count && local->monitors > 0) 2857 ieee80211_add_virtual_monitor(local); 2858 2859 /* 2860 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2861 * sessions can be established after a resume. 2862 * 2863 * Also tear down aggregation sessions since reconfiguring 2864 * them in a hardware restart scenario is not easily done 2865 * right now, and the hardware will have lost information 2866 * about the sessions, but we and the AP still think they 2867 * are active. This is really a workaround though. 2868 */ 2869 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2870 mutex_lock(&local->sta_mtx); 2871 2872 list_for_each_entry(sta, &local->sta_list, list) { 2873 if (!local->resuming) 2874 ieee80211_sta_tear_down_BA_sessions( 2875 sta, AGG_STOP_LOCAL_REQUEST); 2876 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2877 } 2878 2879 mutex_unlock(&local->sta_mtx); 2880 } 2881 2882 /* 2883 * If this is for hw restart things are still running. 2884 * We may want to change that later, however. 2885 */ 2886 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2887 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2888 2889 if (local->in_reconfig) { 2890 in_reconfig = local->in_reconfig; 2891 local->in_reconfig = false; 2892 barrier(); 2893 2894 /* Restart deferred ROCs */ 2895 mutex_lock(&local->mtx); 2896 ieee80211_start_next_roc(local); 2897 mutex_unlock(&local->mtx); 2898 2899 /* Requeue all works */ 2900 list_for_each_entry(sdata, &local->interfaces, list) 2901 ieee80211_queue_work(&local->hw, &sdata->work); 2902 } 2903 2904 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2905 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2906 false); 2907 2908 if (in_reconfig) { 2909 list_for_each_entry(sdata, &local->interfaces, list) { 2910 if (!ieee80211_sdata_running(sdata)) 2911 continue; 2912 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2913 ieee80211_sta_restart(sdata); 2914 } 2915 } 2916 2917 if (!suspended) 2918 return 0; 2919 2920 #ifdef CONFIG_PM 2921 /* first set suspended false, then resuming */ 2922 local->suspended = false; 2923 mb(); 2924 local->resuming = false; 2925 2926 ieee80211_flush_completed_scan(local, false); 2927 2928 if (local->open_count && !reconfig_due_to_wowlan) 2929 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2930 2931 list_for_each_entry(sdata, &local->interfaces, list) { 2932 if (!ieee80211_sdata_running(sdata)) 2933 continue; 2934 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2935 ieee80211_sta_restart(sdata); 2936 } 2937 2938 mod_timer(&local->sta_cleanup, jiffies + 1); 2939 #else 2940 WARN_ON(1); 2941 #endif 2942 2943 return 0; 2944 } 2945 2946 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2947 { 2948 struct ieee80211_sub_if_data *sdata; 2949 struct ieee80211_local *local; 2950 struct ieee80211_key *key; 2951 2952 if (WARN_ON(!vif)) 2953 return; 2954 2955 sdata = vif_to_sdata(vif); 2956 local = sdata->local; 2957 2958 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2959 !local->resuming)) 2960 return; 2961 2962 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2963 !local->in_reconfig)) 2964 return; 2965 2966 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2967 return; 2968 2969 sdata->flags |= flag; 2970 2971 mutex_lock(&local->key_mtx); 2972 list_for_each_entry(key, &sdata->key_list, list) 2973 key->flags |= KEY_FLAG_TAINTED; 2974 mutex_unlock(&local->key_mtx); 2975 } 2976 2977 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2978 { 2979 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2980 } 2981 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2982 2983 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2984 { 2985 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2986 } 2987 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2988 2989 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2990 struct ieee80211_link_data *link) 2991 { 2992 struct ieee80211_local *local = sdata->local; 2993 struct ieee80211_chanctx_conf *chanctx_conf; 2994 struct ieee80211_chanctx *chanctx; 2995 2996 mutex_lock(&local->chanctx_mtx); 2997 2998 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2999 lockdep_is_held(&local->chanctx_mtx)); 3000 3001 /* 3002 * This function can be called from a work, thus it may be possible 3003 * that the chanctx_conf is removed (due to a disconnection, for 3004 * example). 3005 * So nothing should be done in such case. 3006 */ 3007 if (!chanctx_conf) 3008 goto unlock; 3009 3010 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 3011 ieee80211_recalc_smps_chanctx(local, chanctx); 3012 unlock: 3013 mutex_unlock(&local->chanctx_mtx); 3014 } 3015 3016 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 3017 int link_id) 3018 { 3019 struct ieee80211_local *local = sdata->local; 3020 struct ieee80211_chanctx_conf *chanctx_conf; 3021 struct ieee80211_chanctx *chanctx; 3022 int i; 3023 3024 mutex_lock(&local->chanctx_mtx); 3025 3026 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 3027 struct ieee80211_bss_conf *bss_conf; 3028 3029 if (link_id >= 0 && link_id != i) 3030 continue; 3031 3032 rcu_read_lock(); 3033 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 3034 if (!bss_conf) { 3035 rcu_read_unlock(); 3036 continue; 3037 } 3038 3039 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 3040 lockdep_is_held(&local->chanctx_mtx)); 3041 /* 3042 * Since we hold the chanctx_mtx (checked above) 3043 * we can take the chanctx_conf pointer out of the 3044 * RCU critical section, it cannot go away without 3045 * the mutex. Just the way we reached it could - in 3046 * theory - go away, but we don't really care and 3047 * it really shouldn't happen anyway. 3048 */ 3049 rcu_read_unlock(); 3050 3051 if (!chanctx_conf) 3052 goto unlock; 3053 3054 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 3055 conf); 3056 ieee80211_recalc_chanctx_min_def(local, chanctx); 3057 } 3058 unlock: 3059 mutex_unlock(&local->chanctx_mtx); 3060 } 3061 3062 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 3063 { 3064 size_t pos = offset; 3065 3066 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 3067 pos += 2 + ies[pos + 1]; 3068 3069 return pos; 3070 } 3071 3072 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3073 u16 cap) 3074 { 3075 __le16 tmp; 3076 3077 *pos++ = WLAN_EID_HT_CAPABILITY; 3078 *pos++ = sizeof(struct ieee80211_ht_cap); 3079 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 3080 3081 /* capability flags */ 3082 tmp = cpu_to_le16(cap); 3083 memcpy(pos, &tmp, sizeof(u16)); 3084 pos += sizeof(u16); 3085 3086 /* AMPDU parameters */ 3087 *pos++ = ht_cap->ampdu_factor | 3088 (ht_cap->ampdu_density << 3089 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 3090 3091 /* MCS set */ 3092 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 3093 pos += sizeof(ht_cap->mcs); 3094 3095 /* extended capabilities */ 3096 pos += sizeof(__le16); 3097 3098 /* BF capabilities */ 3099 pos += sizeof(__le32); 3100 3101 /* antenna selection */ 3102 pos += sizeof(u8); 3103 3104 return pos; 3105 } 3106 3107 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3108 u32 cap) 3109 { 3110 __le32 tmp; 3111 3112 *pos++ = WLAN_EID_VHT_CAPABILITY; 3113 *pos++ = sizeof(struct ieee80211_vht_cap); 3114 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 3115 3116 /* capability flags */ 3117 tmp = cpu_to_le32(cap); 3118 memcpy(pos, &tmp, sizeof(u32)); 3119 pos += sizeof(u32); 3120 3121 /* VHT MCS set */ 3122 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 3123 pos += sizeof(vht_cap->vht_mcs); 3124 3125 return pos; 3126 } 3127 3128 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 3129 { 3130 const struct ieee80211_sta_he_cap *he_cap; 3131 struct ieee80211_supported_band *sband; 3132 u8 n; 3133 3134 sband = ieee80211_get_sband(sdata); 3135 if (!sband) 3136 return 0; 3137 3138 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3139 if (!he_cap) 3140 return 0; 3141 3142 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 3143 return 2 + 1 + 3144 sizeof(he_cap->he_cap_elem) + n + 3145 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3146 he_cap->he_cap_elem.phy_cap_info); 3147 } 3148 3149 u8 *ieee80211_ie_build_he_cap(ieee80211_conn_flags_t disable_flags, u8 *pos, 3150 const struct ieee80211_sta_he_cap *he_cap, 3151 u8 *end) 3152 { 3153 struct ieee80211_he_cap_elem elem; 3154 u8 n; 3155 u8 ie_len; 3156 u8 *orig_pos = pos; 3157 3158 /* Make sure we have place for the IE */ 3159 /* 3160 * TODO: the 1 added is because this temporarily is under the EXTENSION 3161 * IE. Get rid of it when it moves. 3162 */ 3163 if (!he_cap) 3164 return orig_pos; 3165 3166 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 3167 elem = he_cap->he_cap_elem; 3168 3169 if (disable_flags & IEEE80211_CONN_DISABLE_40MHZ) 3170 elem.phy_cap_info[0] &= 3171 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 3172 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 3173 3174 if (disable_flags & IEEE80211_CONN_DISABLE_160MHZ) 3175 elem.phy_cap_info[0] &= 3176 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3177 3178 if (disable_flags & IEEE80211_CONN_DISABLE_80P80MHZ) 3179 elem.phy_cap_info[0] &= 3180 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3181 3182 n = ieee80211_he_mcs_nss_size(&elem); 3183 ie_len = 2 + 1 + 3184 sizeof(he_cap->he_cap_elem) + n + 3185 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 3186 he_cap->he_cap_elem.phy_cap_info); 3187 3188 if ((end - pos) < ie_len) 3189 return orig_pos; 3190 3191 *pos++ = WLAN_EID_EXTENSION; 3192 pos++; /* We'll set the size later below */ 3193 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 3194 3195 /* Fixed data */ 3196 memcpy(pos, &elem, sizeof(elem)); 3197 pos += sizeof(elem); 3198 3199 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 3200 pos += n; 3201 3202 /* Check if PPE Threshold should be present */ 3203 if ((he_cap->he_cap_elem.phy_cap_info[6] & 3204 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 3205 goto end; 3206 3207 /* 3208 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 3209 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 3210 */ 3211 n = hweight8(he_cap->ppe_thres[0] & 3212 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 3213 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 3214 IEEE80211_PPE_THRES_NSS_POS)); 3215 3216 /* 3217 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 3218 * total size. 3219 */ 3220 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 3221 n = DIV_ROUND_UP(n, 8); 3222 3223 /* Copy PPE Thresholds */ 3224 memcpy(pos, &he_cap->ppe_thres, n); 3225 pos += n; 3226 3227 end: 3228 orig_pos[1] = (pos - orig_pos) - 2; 3229 return pos; 3230 } 3231 3232 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata, 3233 enum ieee80211_smps_mode smps_mode, 3234 struct sk_buff *skb) 3235 { 3236 struct ieee80211_supported_band *sband; 3237 const struct ieee80211_sband_iftype_data *iftd; 3238 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3239 u8 *pos; 3240 u16 cap; 3241 3242 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 3243 BIT(NL80211_BAND_6GHZ), 3244 IEEE80211_CHAN_NO_HE)) 3245 return; 3246 3247 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3248 3249 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 3250 if (!iftd) 3251 return; 3252 3253 /* Check for device HE 6 GHz capability before adding element */ 3254 if (!iftd->he_6ghz_capa.capa) 3255 return; 3256 3257 cap = le16_to_cpu(iftd->he_6ghz_capa.capa); 3258 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS; 3259 3260 switch (smps_mode) { 3261 case IEEE80211_SMPS_AUTOMATIC: 3262 case IEEE80211_SMPS_NUM_MODES: 3263 WARN_ON(1); 3264 fallthrough; 3265 case IEEE80211_SMPS_OFF: 3266 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 3267 IEEE80211_HE_6GHZ_CAP_SM_PS); 3268 break; 3269 case IEEE80211_SMPS_STATIC: 3270 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 3271 IEEE80211_HE_6GHZ_CAP_SM_PS); 3272 break; 3273 case IEEE80211_SMPS_DYNAMIC: 3274 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 3275 IEEE80211_HE_6GHZ_CAP_SM_PS); 3276 break; 3277 } 3278 3279 pos = skb_put(skb, 2 + 1 + sizeof(cap)); 3280 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap), 3281 pos + 2 + 1 + sizeof(cap)); 3282 } 3283 3284 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 3285 const struct cfg80211_chan_def *chandef, 3286 u16 prot_mode, bool rifs_mode) 3287 { 3288 struct ieee80211_ht_operation *ht_oper; 3289 /* Build HT Information */ 3290 *pos++ = WLAN_EID_HT_OPERATION; 3291 *pos++ = sizeof(struct ieee80211_ht_operation); 3292 ht_oper = (struct ieee80211_ht_operation *)pos; 3293 ht_oper->primary_chan = ieee80211_frequency_to_channel( 3294 chandef->chan->center_freq); 3295 switch (chandef->width) { 3296 case NL80211_CHAN_WIDTH_160: 3297 case NL80211_CHAN_WIDTH_80P80: 3298 case NL80211_CHAN_WIDTH_80: 3299 case NL80211_CHAN_WIDTH_40: 3300 if (chandef->center_freq1 > chandef->chan->center_freq) 3301 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3302 else 3303 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3304 break; 3305 case NL80211_CHAN_WIDTH_320: 3306 /* HT information element should not be included on 6GHz */ 3307 WARN_ON(1); 3308 return pos; 3309 default: 3310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 3311 break; 3312 } 3313 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 3314 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 3315 chandef->width != NL80211_CHAN_WIDTH_20) 3316 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 3317 3318 if (rifs_mode) 3319 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 3320 3321 ht_oper->operation_mode = cpu_to_le16(prot_mode); 3322 ht_oper->stbc_param = 0x0000; 3323 3324 /* It seems that Basic MCS set and Supported MCS set 3325 are identical for the first 10 bytes */ 3326 memset(&ht_oper->basic_set, 0, 16); 3327 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 3328 3329 return pos + sizeof(struct ieee80211_ht_operation); 3330 } 3331 3332 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 3333 const struct cfg80211_chan_def *chandef) 3334 { 3335 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 3336 *pos++ = 3; /* IE length */ 3337 /* New channel width */ 3338 switch (chandef->width) { 3339 case NL80211_CHAN_WIDTH_80: 3340 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 3341 break; 3342 case NL80211_CHAN_WIDTH_160: 3343 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 3344 break; 3345 case NL80211_CHAN_WIDTH_80P80: 3346 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 3347 break; 3348 case NL80211_CHAN_WIDTH_320: 3349 /* The behavior is not defined for 320 MHz channels */ 3350 WARN_ON(1); 3351 fallthrough; 3352 default: 3353 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 3354 } 3355 3356 /* new center frequency segment 0 */ 3357 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 3358 /* new center frequency segment 1 */ 3359 if (chandef->center_freq2) 3360 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 3361 else 3362 *pos++ = 0; 3363 } 3364 3365 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 3366 const struct cfg80211_chan_def *chandef) 3367 { 3368 struct ieee80211_vht_operation *vht_oper; 3369 3370 *pos++ = WLAN_EID_VHT_OPERATION; 3371 *pos++ = sizeof(struct ieee80211_vht_operation); 3372 vht_oper = (struct ieee80211_vht_operation *)pos; 3373 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 3374 chandef->center_freq1); 3375 if (chandef->center_freq2) 3376 vht_oper->center_freq_seg1_idx = 3377 ieee80211_frequency_to_channel(chandef->center_freq2); 3378 else 3379 vht_oper->center_freq_seg1_idx = 0x00; 3380 3381 switch (chandef->width) { 3382 case NL80211_CHAN_WIDTH_160: 3383 /* 3384 * Convert 160 MHz channel width to new style as interop 3385 * workaround. 3386 */ 3387 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3388 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 3389 if (chandef->chan->center_freq < chandef->center_freq1) 3390 vht_oper->center_freq_seg0_idx -= 8; 3391 else 3392 vht_oper->center_freq_seg0_idx += 8; 3393 break; 3394 case NL80211_CHAN_WIDTH_80P80: 3395 /* 3396 * Convert 80+80 MHz channel width to new style as interop 3397 * workaround. 3398 */ 3399 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3400 break; 3401 case NL80211_CHAN_WIDTH_80: 3402 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 3403 break; 3404 case NL80211_CHAN_WIDTH_320: 3405 /* VHT information element should not be included on 6GHz */ 3406 WARN_ON(1); 3407 return pos; 3408 default: 3409 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 3410 break; 3411 } 3412 3413 /* don't require special VHT peer rates */ 3414 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 3415 3416 return pos + sizeof(struct ieee80211_vht_operation); 3417 } 3418 3419 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef) 3420 { 3421 struct ieee80211_he_operation *he_oper; 3422 struct ieee80211_he_6ghz_oper *he_6ghz_op; 3423 u32 he_oper_params; 3424 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 3425 3426 if (chandef->chan->band == NL80211_BAND_6GHZ) 3427 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 3428 3429 *pos++ = WLAN_EID_EXTENSION; 3430 *pos++ = ie_len; 3431 *pos++ = WLAN_EID_EXT_HE_OPERATION; 3432 3433 he_oper_params = 0; 3434 he_oper_params |= u32_encode_bits(1023, /* disabled */ 3435 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 3436 he_oper_params |= u32_encode_bits(1, 3437 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 3438 he_oper_params |= u32_encode_bits(1, 3439 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 3440 if (chandef->chan->band == NL80211_BAND_6GHZ) 3441 he_oper_params |= u32_encode_bits(1, 3442 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 3443 3444 he_oper = (struct ieee80211_he_operation *)pos; 3445 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 3446 3447 /* don't require special HE peer rates */ 3448 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 3449 pos += sizeof(struct ieee80211_he_operation); 3450 3451 if (chandef->chan->band != NL80211_BAND_6GHZ) 3452 goto out; 3453 3454 /* TODO add VHT operational */ 3455 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3456 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3457 he_6ghz_op->primary = 3458 ieee80211_frequency_to_channel(chandef->chan->center_freq); 3459 he_6ghz_op->ccfs0 = 3460 ieee80211_frequency_to_channel(chandef->center_freq1); 3461 if (chandef->center_freq2) 3462 he_6ghz_op->ccfs1 = 3463 ieee80211_frequency_to_channel(chandef->center_freq2); 3464 else 3465 he_6ghz_op->ccfs1 = 0; 3466 3467 switch (chandef->width) { 3468 case NL80211_CHAN_WIDTH_320: 3469 /* 3470 * TODO: mesh operation is not defined over 6GHz 320 MHz 3471 * channels. 3472 */ 3473 WARN_ON(1); 3474 break; 3475 case NL80211_CHAN_WIDTH_160: 3476 /* Convert 160 MHz channel width to new style as interop 3477 * workaround. 3478 */ 3479 he_6ghz_op->control = 3480 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3481 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3482 if (chandef->chan->center_freq < chandef->center_freq1) 3483 he_6ghz_op->ccfs0 -= 8; 3484 else 3485 he_6ghz_op->ccfs0 += 8; 3486 fallthrough; 3487 case NL80211_CHAN_WIDTH_80P80: 3488 he_6ghz_op->control = 3489 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3490 break; 3491 case NL80211_CHAN_WIDTH_80: 3492 he_6ghz_op->control = 3493 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3494 break; 3495 case NL80211_CHAN_WIDTH_40: 3496 he_6ghz_op->control = 3497 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3498 break; 3499 default: 3500 he_6ghz_op->control = 3501 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3502 break; 3503 } 3504 3505 pos += sizeof(struct ieee80211_he_6ghz_oper); 3506 3507 out: 3508 return pos; 3509 } 3510 3511 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3512 struct cfg80211_chan_def *chandef) 3513 { 3514 enum nl80211_channel_type channel_type; 3515 3516 if (!ht_oper) 3517 return false; 3518 3519 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3520 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3521 channel_type = NL80211_CHAN_HT20; 3522 break; 3523 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3524 channel_type = NL80211_CHAN_HT40PLUS; 3525 break; 3526 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3527 channel_type = NL80211_CHAN_HT40MINUS; 3528 break; 3529 default: 3530 return false; 3531 } 3532 3533 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3534 return true; 3535 } 3536 3537 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3538 const struct ieee80211_vht_operation *oper, 3539 const struct ieee80211_ht_operation *htop, 3540 struct cfg80211_chan_def *chandef) 3541 { 3542 struct cfg80211_chan_def new = *chandef; 3543 int cf0, cf1; 3544 int ccfs0, ccfs1, ccfs2; 3545 int ccf0, ccf1; 3546 u32 vht_cap; 3547 bool support_80_80 = false; 3548 bool support_160 = false; 3549 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3550 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3551 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3552 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3553 3554 if (!oper || !htop) 3555 return false; 3556 3557 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3558 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3559 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3560 support_80_80 = ((vht_cap & 3561 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3562 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3563 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3564 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3565 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3566 ccfs0 = oper->center_freq_seg0_idx; 3567 ccfs1 = oper->center_freq_seg1_idx; 3568 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3569 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3570 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3571 3572 ccf0 = ccfs0; 3573 3574 /* if not supported, parse as though we didn't understand it */ 3575 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3576 ext_nss_bw_supp = 0; 3577 3578 /* 3579 * Cf. IEEE 802.11 Table 9-250 3580 * 3581 * We really just consider that because it's inefficient to connect 3582 * at a higher bandwidth than we'll actually be able to use. 3583 */ 3584 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3585 default: 3586 case 0x00: 3587 ccf1 = 0; 3588 support_160 = false; 3589 support_80_80 = false; 3590 break; 3591 case 0x01: 3592 support_80_80 = false; 3593 fallthrough; 3594 case 0x02: 3595 case 0x03: 3596 ccf1 = ccfs2; 3597 break; 3598 case 0x10: 3599 ccf1 = ccfs1; 3600 break; 3601 case 0x11: 3602 case 0x12: 3603 if (!ccfs1) 3604 ccf1 = ccfs2; 3605 else 3606 ccf1 = ccfs1; 3607 break; 3608 case 0x13: 3609 case 0x20: 3610 case 0x23: 3611 ccf1 = ccfs1; 3612 break; 3613 } 3614 3615 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3616 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3617 3618 switch (oper->chan_width) { 3619 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3620 /* just use HT information directly */ 3621 break; 3622 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3623 new.width = NL80211_CHAN_WIDTH_80; 3624 new.center_freq1 = cf0; 3625 /* If needed, adjust based on the newer interop workaround. */ 3626 if (ccf1) { 3627 unsigned int diff; 3628 3629 diff = abs(ccf1 - ccf0); 3630 if ((diff == 8) && support_160) { 3631 new.width = NL80211_CHAN_WIDTH_160; 3632 new.center_freq1 = cf1; 3633 } else if ((diff > 8) && support_80_80) { 3634 new.width = NL80211_CHAN_WIDTH_80P80; 3635 new.center_freq2 = cf1; 3636 } 3637 } 3638 break; 3639 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3640 /* deprecated encoding */ 3641 new.width = NL80211_CHAN_WIDTH_160; 3642 new.center_freq1 = cf0; 3643 break; 3644 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3645 /* deprecated encoding */ 3646 new.width = NL80211_CHAN_WIDTH_80P80; 3647 new.center_freq1 = cf0; 3648 new.center_freq2 = cf1; 3649 break; 3650 default: 3651 return false; 3652 } 3653 3654 if (!cfg80211_chandef_valid(&new)) 3655 return false; 3656 3657 *chandef = new; 3658 return true; 3659 } 3660 3661 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation *eht_oper, 3662 bool support_160, bool support_320, 3663 struct cfg80211_chan_def *chandef) 3664 { 3665 struct ieee80211_eht_operation_info *info = (void *)eht_oper->optional; 3666 3667 chandef->center_freq1 = 3668 ieee80211_channel_to_frequency(info->ccfs0, 3669 chandef->chan->band); 3670 3671 switch (u8_get_bits(info->control, 3672 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3673 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3674 chandef->width = NL80211_CHAN_WIDTH_20; 3675 break; 3676 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3677 chandef->width = NL80211_CHAN_WIDTH_40; 3678 break; 3679 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3680 chandef->width = NL80211_CHAN_WIDTH_80; 3681 break; 3682 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3683 if (support_160) { 3684 chandef->width = NL80211_CHAN_WIDTH_160; 3685 chandef->center_freq1 = 3686 ieee80211_channel_to_frequency(info->ccfs1, 3687 chandef->chan->band); 3688 } else { 3689 chandef->width = NL80211_CHAN_WIDTH_80; 3690 } 3691 break; 3692 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3693 if (support_320) { 3694 chandef->width = NL80211_CHAN_WIDTH_320; 3695 chandef->center_freq1 = 3696 ieee80211_channel_to_frequency(info->ccfs1, 3697 chandef->chan->band); 3698 } else if (support_160) { 3699 chandef->width = NL80211_CHAN_WIDTH_160; 3700 } else { 3701 chandef->width = NL80211_CHAN_WIDTH_80; 3702 3703 if (chandef->center_freq1 > chandef->chan->center_freq) 3704 chandef->center_freq1 -= 40; 3705 else 3706 chandef->center_freq1 += 40; 3707 } 3708 break; 3709 } 3710 } 3711 3712 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata, 3713 const struct ieee80211_he_operation *he_oper, 3714 const struct ieee80211_eht_operation *eht_oper, 3715 struct cfg80211_chan_def *chandef) 3716 { 3717 struct ieee80211_local *local = sdata->local; 3718 struct ieee80211_supported_band *sband; 3719 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 3720 const struct ieee80211_sta_he_cap *he_cap; 3721 const struct ieee80211_sta_eht_cap *eht_cap; 3722 struct cfg80211_chan_def he_chandef = *chandef; 3723 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3724 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 3725 bool support_80_80, support_160, support_320; 3726 u8 he_phy_cap, eht_phy_cap; 3727 u32 freq; 3728 3729 if (chandef->chan->band != NL80211_BAND_6GHZ) 3730 return true; 3731 3732 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 3733 3734 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 3735 if (!he_cap) { 3736 sdata_info(sdata, "Missing iftype sband data/HE cap"); 3737 return false; 3738 } 3739 3740 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0]; 3741 support_160 = 3742 he_phy_cap & 3743 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 3744 support_80_80 = 3745 he_phy_cap & 3746 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 3747 3748 if (!he_oper) { 3749 sdata_info(sdata, 3750 "HE is not advertised on (on %d MHz), expect issues\n", 3751 chandef->chan->center_freq); 3752 return false; 3753 } 3754 3755 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 3756 if (!eht_cap) { 3757 sdata_info(sdata, "Missing iftype sband data/EHT cap"); 3758 eht_oper = NULL; 3759 } 3760 3761 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3762 3763 if (!he_6ghz_oper) { 3764 sdata_info(sdata, 3765 "HE 6GHz operation missing (on %d MHz), expect issues\n", 3766 chandef->chan->center_freq); 3767 return false; 3768 } 3769 3770 /* 3771 * The EHT operation IE does not contain the primary channel so the 3772 * primary channel frequency should be taken from the 6 GHz operation 3773 * information. 3774 */ 3775 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3776 NL80211_BAND_6GHZ); 3777 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); 3778 3779 switch (u8_get_bits(he_6ghz_oper->control, 3780 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 3781 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 3782 bss_conf->power_type = IEEE80211_REG_LPI_AP; 3783 break; 3784 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 3785 bss_conf->power_type = IEEE80211_REG_SP_AP; 3786 break; 3787 default: 3788 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 3789 break; 3790 } 3791 3792 if (!eht_oper || 3793 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3794 switch (u8_get_bits(he_6ghz_oper->control, 3795 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3796 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3797 he_chandef.width = NL80211_CHAN_WIDTH_20; 3798 break; 3799 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3800 he_chandef.width = NL80211_CHAN_WIDTH_40; 3801 break; 3802 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3803 he_chandef.width = NL80211_CHAN_WIDTH_80; 3804 break; 3805 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3806 he_chandef.width = NL80211_CHAN_WIDTH_80; 3807 if (!he_6ghz_oper->ccfs1) 3808 break; 3809 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) { 3810 if (support_160) 3811 he_chandef.width = NL80211_CHAN_WIDTH_160; 3812 } else { 3813 if (support_80_80) 3814 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3815 } 3816 break; 3817 } 3818 3819 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3820 he_chandef.center_freq1 = 3821 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3822 NL80211_BAND_6GHZ); 3823 } else { 3824 he_chandef.center_freq1 = 3825 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3826 NL80211_BAND_6GHZ); 3827 if (support_80_80 || support_160) 3828 he_chandef.center_freq2 = 3829 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3830 NL80211_BAND_6GHZ); 3831 } 3832 } else { 3833 eht_phy_cap = eht_cap->eht_cap_elem.phy_cap_info[0]; 3834 support_320 = 3835 eht_phy_cap & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 3836 3837 ieee80211_chandef_eht_oper(eht_oper, support_160, 3838 support_320, &he_chandef); 3839 } 3840 3841 if (!cfg80211_chandef_valid(&he_chandef)) { 3842 sdata_info(sdata, 3843 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n", 3844 he_chandef.chan ? he_chandef.chan->center_freq : 0, 3845 he_chandef.width, 3846 he_chandef.center_freq1, 3847 he_chandef.center_freq2); 3848 return false; 3849 } 3850 3851 *chandef = he_chandef; 3852 3853 return true; 3854 } 3855 3856 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper, 3857 struct cfg80211_chan_def *chandef) 3858 { 3859 u32 oper_freq; 3860 3861 if (!oper) 3862 return false; 3863 3864 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3865 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3866 chandef->width = NL80211_CHAN_WIDTH_1; 3867 break; 3868 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3869 chandef->width = NL80211_CHAN_WIDTH_2; 3870 break; 3871 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3872 chandef->width = NL80211_CHAN_WIDTH_4; 3873 break; 3874 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3875 chandef->width = NL80211_CHAN_WIDTH_8; 3876 break; 3877 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3878 chandef->width = NL80211_CHAN_WIDTH_16; 3879 break; 3880 default: 3881 return false; 3882 } 3883 3884 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch, 3885 NL80211_BAND_S1GHZ); 3886 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq); 3887 chandef->freq1_offset = oper_freq % 1000; 3888 3889 return true; 3890 } 3891 3892 int ieee80211_parse_bitrates(enum nl80211_chan_width width, 3893 const struct ieee80211_supported_band *sband, 3894 const u8 *srates, int srates_len, u32 *rates) 3895 { 3896 u32 rate_flags = ieee80211_chanwidth_rate_flags(width); 3897 int shift = ieee80211_chanwidth_get_shift(width); 3898 struct ieee80211_rate *br; 3899 int brate, rate, i, j, count = 0; 3900 3901 *rates = 0; 3902 3903 for (i = 0; i < srates_len; i++) { 3904 rate = srates[i] & 0x7f; 3905 3906 for (j = 0; j < sband->n_bitrates; j++) { 3907 br = &sband->bitrates[j]; 3908 if ((rate_flags & br->flags) != rate_flags) 3909 continue; 3910 3911 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3912 if (brate == rate) { 3913 *rates |= BIT(j); 3914 count++; 3915 break; 3916 } 3917 } 3918 } 3919 return count; 3920 } 3921 3922 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3923 struct sk_buff *skb, bool need_basic, 3924 enum nl80211_band band) 3925 { 3926 struct ieee80211_local *local = sdata->local; 3927 struct ieee80211_supported_band *sband; 3928 int rate, shift; 3929 u8 i, rates, *pos; 3930 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3931 u32 rate_flags; 3932 3933 shift = ieee80211_vif_get_shift(&sdata->vif); 3934 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3935 sband = local->hw.wiphy->bands[band]; 3936 rates = 0; 3937 for (i = 0; i < sband->n_bitrates; i++) { 3938 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3939 continue; 3940 rates++; 3941 } 3942 if (rates > 8) 3943 rates = 8; 3944 3945 if (skb_tailroom(skb) < rates + 2) 3946 return -ENOMEM; 3947 3948 pos = skb_put(skb, rates + 2); 3949 *pos++ = WLAN_EID_SUPP_RATES; 3950 *pos++ = rates; 3951 for (i = 0; i < rates; i++) { 3952 u8 basic = 0; 3953 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3954 continue; 3955 3956 if (need_basic && basic_rates & BIT(i)) 3957 basic = 0x80; 3958 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3959 5 * (1 << shift)); 3960 *pos++ = basic | (u8) rate; 3961 } 3962 3963 return 0; 3964 } 3965 3966 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3967 struct sk_buff *skb, bool need_basic, 3968 enum nl80211_band band) 3969 { 3970 struct ieee80211_local *local = sdata->local; 3971 struct ieee80211_supported_band *sband; 3972 int rate, shift; 3973 u8 i, exrates, *pos; 3974 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3975 u32 rate_flags; 3976 3977 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3978 shift = ieee80211_vif_get_shift(&sdata->vif); 3979 3980 sband = local->hw.wiphy->bands[band]; 3981 exrates = 0; 3982 for (i = 0; i < sband->n_bitrates; i++) { 3983 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3984 continue; 3985 exrates++; 3986 } 3987 3988 if (exrates > 8) 3989 exrates -= 8; 3990 else 3991 exrates = 0; 3992 3993 if (skb_tailroom(skb) < exrates + 2) 3994 return -ENOMEM; 3995 3996 if (exrates) { 3997 pos = skb_put(skb, exrates + 2); 3998 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3999 *pos++ = exrates; 4000 for (i = 8; i < sband->n_bitrates; i++) { 4001 u8 basic = 0; 4002 if ((rate_flags & sband->bitrates[i].flags) 4003 != rate_flags) 4004 continue; 4005 if (need_basic && basic_rates & BIT(i)) 4006 basic = 0x80; 4007 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 4008 5 * (1 << shift)); 4009 *pos++ = basic | (u8) rate; 4010 } 4011 } 4012 return 0; 4013 } 4014 4015 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 4016 { 4017 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4018 4019 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 4020 return 0; 4021 4022 return -ewma_beacon_signal_read(&sdata->deflink.u.mgd.ave_beacon_signal); 4023 } 4024 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 4025 4026 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 4027 { 4028 if (!mcs) 4029 return 1; 4030 4031 /* TODO: consider rx_highest */ 4032 4033 if (mcs->rx_mask[3]) 4034 return 4; 4035 if (mcs->rx_mask[2]) 4036 return 3; 4037 if (mcs->rx_mask[1]) 4038 return 2; 4039 return 1; 4040 } 4041 4042 /** 4043 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 4044 * @local: mac80211 hw info struct 4045 * @status: RX status 4046 * @mpdu_len: total MPDU length (including FCS) 4047 * @mpdu_offset: offset into MPDU to calculate timestamp at 4048 * 4049 * This function calculates the RX timestamp at the given MPDU offset, taking 4050 * into account what the RX timestamp was. An offset of 0 will just normalize 4051 * the timestamp to TSF at beginning of MPDU reception. 4052 */ 4053 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 4054 struct ieee80211_rx_status *status, 4055 unsigned int mpdu_len, 4056 unsigned int mpdu_offset) 4057 { 4058 u64 ts = status->mactime; 4059 struct rate_info ri; 4060 u16 rate; 4061 u8 n_ltf; 4062 4063 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 4064 return 0; 4065 4066 memset(&ri, 0, sizeof(ri)); 4067 4068 ri.bw = status->bw; 4069 4070 /* Fill cfg80211 rate info */ 4071 switch (status->encoding) { 4072 case RX_ENC_HE: 4073 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 4074 ri.mcs = status->rate_idx; 4075 ri.nss = status->nss; 4076 ri.he_ru_alloc = status->he_ru; 4077 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 4078 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 4079 4080 /* 4081 * See P802.11ax_D6.0, section 27.3.4 for 4082 * VHT PPDU format. 4083 */ 4084 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4085 mpdu_offset += 2; 4086 ts += 36; 4087 4088 /* 4089 * TODO: 4090 * For HE MU PPDU, add the HE-SIG-B. 4091 * For HE ER PPDU, add 8us for the HE-SIG-A. 4092 * For HE TB PPDU, add 4us for the HE-STF. 4093 * Add the HE-LTF durations - variable. 4094 */ 4095 } 4096 4097 break; 4098 case RX_ENC_HT: 4099 ri.mcs = status->rate_idx; 4100 ri.flags |= RATE_INFO_FLAGS_MCS; 4101 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 4102 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 4103 4104 /* 4105 * See P802.11REVmd_D3.0, section 19.3.2 for 4106 * HT PPDU format. 4107 */ 4108 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4109 mpdu_offset += 2; 4110 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 4111 ts += 24; 4112 else 4113 ts += 32; 4114 4115 /* 4116 * Add Data HT-LTFs per streams 4117 * TODO: add Extension HT-LTFs, 4us per LTF 4118 */ 4119 n_ltf = ((ri.mcs >> 3) & 3) + 1; 4120 n_ltf = n_ltf == 3 ? 4 : n_ltf; 4121 ts += n_ltf * 4; 4122 } 4123 4124 break; 4125 case RX_ENC_VHT: 4126 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 4127 ri.mcs = status->rate_idx; 4128 ri.nss = status->nss; 4129 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 4130 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 4131 4132 /* 4133 * See P802.11REVmd_D3.0, section 21.3.2 for 4134 * VHT PPDU format. 4135 */ 4136 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4137 mpdu_offset += 2; 4138 ts += 36; 4139 4140 /* 4141 * Add VHT-LTFs per streams 4142 */ 4143 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 4144 ri.nss + 1 : ri.nss; 4145 ts += 4 * n_ltf; 4146 } 4147 4148 break; 4149 default: 4150 WARN_ON(1); 4151 fallthrough; 4152 case RX_ENC_LEGACY: { 4153 struct ieee80211_supported_band *sband; 4154 int shift = 0; 4155 int bitrate; 4156 4157 switch (status->bw) { 4158 case RATE_INFO_BW_10: 4159 shift = 1; 4160 break; 4161 case RATE_INFO_BW_5: 4162 shift = 2; 4163 break; 4164 } 4165 4166 sband = local->hw.wiphy->bands[status->band]; 4167 bitrate = sband->bitrates[status->rate_idx].bitrate; 4168 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 4169 4170 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 4171 if (status->band == NL80211_BAND_5GHZ) { 4172 ts += 20 << shift; 4173 mpdu_offset += 2; 4174 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 4175 ts += 96; 4176 } else { 4177 ts += 192; 4178 } 4179 } 4180 break; 4181 } 4182 } 4183 4184 rate = cfg80211_calculate_bitrate(&ri); 4185 if (WARN_ONCE(!rate, 4186 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 4187 (unsigned long long)status->flag, status->rate_idx, 4188 status->nss)) 4189 return 0; 4190 4191 /* rewind from end of MPDU */ 4192 if (status->flag & RX_FLAG_MACTIME_END) 4193 ts -= mpdu_len * 8 * 10 / rate; 4194 4195 ts += mpdu_offset * 8 * 10 / rate; 4196 4197 return ts; 4198 } 4199 4200 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 4201 { 4202 struct ieee80211_sub_if_data *sdata; 4203 struct cfg80211_chan_def chandef; 4204 4205 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 4206 lockdep_assert_wiphy(local->hw.wiphy); 4207 4208 mutex_lock(&local->mtx); 4209 list_for_each_entry(sdata, &local->interfaces, list) { 4210 /* it might be waiting for the local->mtx, but then 4211 * by the time it gets it, sdata->wdev.cac_started 4212 * will no longer be true 4213 */ 4214 cancel_delayed_work(&sdata->deflink.dfs_cac_timer_work); 4215 4216 if (sdata->wdev.cac_started) { 4217 chandef = sdata->vif.bss_conf.chandef; 4218 ieee80211_link_release_channel(&sdata->deflink); 4219 cfg80211_cac_event(sdata->dev, 4220 &chandef, 4221 NL80211_RADAR_CAC_ABORTED, 4222 GFP_KERNEL); 4223 } 4224 } 4225 mutex_unlock(&local->mtx); 4226 } 4227 4228 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 4229 { 4230 struct ieee80211_local *local = 4231 container_of(work, struct ieee80211_local, radar_detected_work); 4232 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 4233 struct ieee80211_chanctx *ctx; 4234 int num_chanctx = 0; 4235 4236 mutex_lock(&local->chanctx_mtx); 4237 list_for_each_entry(ctx, &local->chanctx_list, list) { 4238 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 4239 continue; 4240 4241 num_chanctx++; 4242 chandef = ctx->conf.def; 4243 } 4244 mutex_unlock(&local->chanctx_mtx); 4245 4246 wiphy_lock(local->hw.wiphy); 4247 ieee80211_dfs_cac_cancel(local); 4248 wiphy_unlock(local->hw.wiphy); 4249 4250 if (num_chanctx > 1) 4251 /* XXX: multi-channel is not supported yet */ 4252 WARN_ON(1); 4253 else 4254 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 4255 } 4256 4257 void ieee80211_radar_detected(struct ieee80211_hw *hw) 4258 { 4259 struct ieee80211_local *local = hw_to_local(hw); 4260 4261 trace_api_radar_detected(local); 4262 4263 schedule_work(&local->radar_detected_work); 4264 } 4265 EXPORT_SYMBOL(ieee80211_radar_detected); 4266 4267 ieee80211_conn_flags_t ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 4268 { 4269 ieee80211_conn_flags_t ret; 4270 int tmp; 4271 4272 switch (c->width) { 4273 case NL80211_CHAN_WIDTH_20: 4274 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4275 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4276 break; 4277 case NL80211_CHAN_WIDTH_40: 4278 c->width = NL80211_CHAN_WIDTH_20; 4279 c->center_freq1 = c->chan->center_freq; 4280 ret = IEEE80211_CONN_DISABLE_40MHZ | 4281 IEEE80211_CONN_DISABLE_VHT; 4282 break; 4283 case NL80211_CHAN_WIDTH_80: 4284 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 4285 /* n_P40 */ 4286 tmp /= 2; 4287 /* freq_P40 */ 4288 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 4289 c->width = NL80211_CHAN_WIDTH_40; 4290 ret = IEEE80211_CONN_DISABLE_VHT; 4291 break; 4292 case NL80211_CHAN_WIDTH_80P80: 4293 c->center_freq2 = 0; 4294 c->width = NL80211_CHAN_WIDTH_80; 4295 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4296 IEEE80211_CONN_DISABLE_160MHZ; 4297 break; 4298 case NL80211_CHAN_WIDTH_160: 4299 /* n_P20 */ 4300 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 4301 /* n_P80 */ 4302 tmp /= 4; 4303 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 4304 c->width = NL80211_CHAN_WIDTH_80; 4305 ret = IEEE80211_CONN_DISABLE_80P80MHZ | 4306 IEEE80211_CONN_DISABLE_160MHZ; 4307 break; 4308 case NL80211_CHAN_WIDTH_320: 4309 /* n_P20 */ 4310 tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; 4311 /* n_P160 */ 4312 tmp /= 8; 4313 c->center_freq1 = c->center_freq1 - 80 + 160 * tmp; 4314 c->width = NL80211_CHAN_WIDTH_160; 4315 ret = IEEE80211_CONN_DISABLE_320MHZ; 4316 break; 4317 default: 4318 case NL80211_CHAN_WIDTH_20_NOHT: 4319 WARN_ON_ONCE(1); 4320 c->width = NL80211_CHAN_WIDTH_20_NOHT; 4321 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4322 break; 4323 case NL80211_CHAN_WIDTH_1: 4324 case NL80211_CHAN_WIDTH_2: 4325 case NL80211_CHAN_WIDTH_4: 4326 case NL80211_CHAN_WIDTH_8: 4327 case NL80211_CHAN_WIDTH_16: 4328 case NL80211_CHAN_WIDTH_5: 4329 case NL80211_CHAN_WIDTH_10: 4330 WARN_ON_ONCE(1); 4331 /* keep c->width */ 4332 ret = IEEE80211_CONN_DISABLE_HT | IEEE80211_CONN_DISABLE_VHT; 4333 break; 4334 } 4335 4336 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 4337 4338 return ret; 4339 } 4340 4341 /* 4342 * Returns true if smps_mode_new is strictly more restrictive than 4343 * smps_mode_old. 4344 */ 4345 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 4346 enum ieee80211_smps_mode smps_mode_new) 4347 { 4348 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 4349 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 4350 return false; 4351 4352 switch (smps_mode_old) { 4353 case IEEE80211_SMPS_STATIC: 4354 return false; 4355 case IEEE80211_SMPS_DYNAMIC: 4356 return smps_mode_new == IEEE80211_SMPS_STATIC; 4357 case IEEE80211_SMPS_OFF: 4358 return smps_mode_new != IEEE80211_SMPS_OFF; 4359 default: 4360 WARN_ON(1); 4361 } 4362 4363 return false; 4364 } 4365 4366 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 4367 struct cfg80211_csa_settings *csa_settings) 4368 { 4369 struct sk_buff *skb; 4370 struct ieee80211_mgmt *mgmt; 4371 struct ieee80211_local *local = sdata->local; 4372 int freq; 4373 int hdr_len = offsetofend(struct ieee80211_mgmt, 4374 u.action.u.chan_switch); 4375 u8 *pos; 4376 4377 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 4378 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 4379 return -EOPNOTSUPP; 4380 4381 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 4382 5 + /* channel switch announcement element */ 4383 3 + /* secondary channel offset element */ 4384 5 + /* wide bandwidth channel switch announcement */ 4385 8); /* mesh channel switch parameters element */ 4386 if (!skb) 4387 return -ENOMEM; 4388 4389 skb_reserve(skb, local->tx_headroom); 4390 mgmt = skb_put_zero(skb, hdr_len); 4391 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 4392 IEEE80211_STYPE_ACTION); 4393 4394 eth_broadcast_addr(mgmt->da); 4395 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 4396 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4397 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 4398 } else { 4399 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 4400 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 4401 } 4402 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 4403 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 4404 pos = skb_put(skb, 5); 4405 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 4406 *pos++ = 3; /* IE length */ 4407 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 4408 freq = csa_settings->chandef.chan->center_freq; 4409 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 4410 *pos++ = csa_settings->count; /* count */ 4411 4412 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 4413 enum nl80211_channel_type ch_type; 4414 4415 skb_put(skb, 3); 4416 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 4417 *pos++ = 1; /* IE length */ 4418 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 4419 if (ch_type == NL80211_CHAN_HT40PLUS) 4420 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 4421 else 4422 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 4423 } 4424 4425 if (ieee80211_vif_is_mesh(&sdata->vif)) { 4426 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 4427 4428 skb_put(skb, 8); 4429 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 4430 *pos++ = 6; /* IE length */ 4431 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 4432 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 4433 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 4434 *pos++ |= csa_settings->block_tx ? 4435 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 4436 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 4437 pos += 2; 4438 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 4439 pos += 2; 4440 } 4441 4442 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 4443 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 4444 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 4445 skb_put(skb, 5); 4446 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 4447 } 4448 4449 ieee80211_tx_skb(sdata, skb); 4450 return 0; 4451 } 4452 4453 static bool 4454 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 4455 { 4456 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 4457 int skip; 4458 4459 if (end > 0) 4460 return false; 4461 4462 /* One shot NOA */ 4463 if (data->count[i] == 1) 4464 return false; 4465 4466 if (data->desc[i].interval == 0) 4467 return false; 4468 4469 /* End time is in the past, check for repetitions */ 4470 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4471 if (data->count[i] < 255) { 4472 if (data->count[i] <= skip) { 4473 data->count[i] = 0; 4474 return false; 4475 } 4476 4477 data->count[i] -= skip; 4478 } 4479 4480 data->desc[i].start += skip * data->desc[i].interval; 4481 4482 return true; 4483 } 4484 4485 static bool 4486 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4487 s32 *offset) 4488 { 4489 bool ret = false; 4490 int i; 4491 4492 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4493 s32 cur; 4494 4495 if (!data->count[i]) 4496 continue; 4497 4498 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4499 ret = true; 4500 4501 cur = data->desc[i].start - tsf; 4502 if (cur > *offset) 4503 continue; 4504 4505 cur = data->desc[i].start + data->desc[i].duration - tsf; 4506 if (cur > *offset) 4507 *offset = cur; 4508 } 4509 4510 return ret; 4511 } 4512 4513 static u32 4514 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4515 { 4516 s32 offset = 0; 4517 int tries = 0; 4518 /* 4519 * arbitrary limit, used to avoid infinite loops when combined NoA 4520 * descriptors cover the full time period. 4521 */ 4522 int max_tries = 5; 4523 4524 ieee80211_extend_absent_time(data, tsf, &offset); 4525 do { 4526 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4527 break; 4528 4529 tries++; 4530 } while (tries < max_tries); 4531 4532 return offset; 4533 } 4534 4535 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4536 { 4537 u32 next_offset = BIT(31) - 1; 4538 int i; 4539 4540 data->absent = 0; 4541 data->has_next_tsf = false; 4542 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4543 s32 start; 4544 4545 if (!data->count[i]) 4546 continue; 4547 4548 ieee80211_extend_noa_desc(data, tsf, i); 4549 start = data->desc[i].start - tsf; 4550 if (start <= 0) 4551 data->absent |= BIT(i); 4552 4553 if (next_offset > start) 4554 next_offset = start; 4555 4556 data->has_next_tsf = true; 4557 } 4558 4559 if (data->absent) 4560 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4561 4562 data->next_tsf = tsf + next_offset; 4563 } 4564 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4565 4566 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4567 struct ieee80211_noa_data *data, u32 tsf) 4568 { 4569 int ret = 0; 4570 int i; 4571 4572 memset(data, 0, sizeof(*data)); 4573 4574 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4575 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4576 4577 if (!desc->count || !desc->duration) 4578 continue; 4579 4580 data->count[i] = desc->count; 4581 data->desc[i].start = le32_to_cpu(desc->start_time); 4582 data->desc[i].duration = le32_to_cpu(desc->duration); 4583 data->desc[i].interval = le32_to_cpu(desc->interval); 4584 4585 if (data->count[i] > 1 && 4586 data->desc[i].interval < data->desc[i].duration) 4587 continue; 4588 4589 ieee80211_extend_noa_desc(data, tsf, i); 4590 ret++; 4591 } 4592 4593 if (ret) 4594 ieee80211_update_p2p_noa(data, tsf); 4595 4596 return ret; 4597 } 4598 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4599 4600 void ieee80211_recalc_dtim(struct ieee80211_local *local, 4601 struct ieee80211_sub_if_data *sdata) 4602 { 4603 u64 tsf = drv_get_tsf(local, sdata); 4604 u64 dtim_count = 0; 4605 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4606 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4607 struct ps_data *ps; 4608 u8 bcns_from_dtim; 4609 4610 if (tsf == -1ULL || !beacon_int || !dtim_period) 4611 return; 4612 4613 if (sdata->vif.type == NL80211_IFTYPE_AP || 4614 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4615 if (!sdata->bss) 4616 return; 4617 4618 ps = &sdata->bss->ps; 4619 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4620 ps = &sdata->u.mesh.ps; 4621 } else { 4622 return; 4623 } 4624 4625 /* 4626 * actually finds last dtim_count, mac80211 will update in 4627 * __beacon_add_tim(). 4628 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4629 */ 4630 do_div(tsf, beacon_int); 4631 bcns_from_dtim = do_div(tsf, dtim_period); 4632 /* just had a DTIM */ 4633 if (!bcns_from_dtim) 4634 dtim_count = 0; 4635 else 4636 dtim_count = dtim_period - bcns_from_dtim; 4637 4638 ps->dtim_count = dtim_count; 4639 } 4640 4641 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4642 struct ieee80211_chanctx *ctx) 4643 { 4644 struct ieee80211_link_data *link; 4645 u8 radar_detect = 0; 4646 4647 lockdep_assert_held(&local->chanctx_mtx); 4648 4649 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4650 return 0; 4651 4652 list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list) 4653 if (link->reserved_radar_required) 4654 radar_detect |= BIT(link->reserved_chandef.width); 4655 4656 /* 4657 * An in-place reservation context should not have any assigned vifs 4658 * until it replaces the other context. 4659 */ 4660 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 4661 !list_empty(&ctx->assigned_links)); 4662 4663 list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) { 4664 if (!link->radar_required) 4665 continue; 4666 4667 radar_detect |= 4668 BIT(link->conf->chandef.width); 4669 } 4670 4671 return radar_detect; 4672 } 4673 4674 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4675 const struct cfg80211_chan_def *chandef, 4676 enum ieee80211_chanctx_mode chanmode, 4677 u8 radar_detect) 4678 { 4679 struct ieee80211_local *local = sdata->local; 4680 struct ieee80211_sub_if_data *sdata_iter; 4681 enum nl80211_iftype iftype = sdata->wdev.iftype; 4682 struct ieee80211_chanctx *ctx; 4683 int total = 1; 4684 struct iface_combination_params params = { 4685 .radar_detect = radar_detect, 4686 }; 4687 4688 lockdep_assert_held(&local->chanctx_mtx); 4689 4690 if (WARN_ON(hweight32(radar_detect) > 1)) 4691 return -EINVAL; 4692 4693 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4694 !chandef->chan)) 4695 return -EINVAL; 4696 4697 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4698 return -EINVAL; 4699 4700 if (sdata->vif.type == NL80211_IFTYPE_AP || 4701 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4702 /* 4703 * always passing this is harmless, since it'll be the 4704 * same value that cfg80211 finds if it finds the same 4705 * interface ... and that's always allowed 4706 */ 4707 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4708 } 4709 4710 /* Always allow software iftypes */ 4711 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4712 if (radar_detect) 4713 return -EINVAL; 4714 return 0; 4715 } 4716 4717 if (chandef) 4718 params.num_different_channels = 1; 4719 4720 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4721 params.iftype_num[iftype] = 1; 4722 4723 list_for_each_entry(ctx, &local->chanctx_list, list) { 4724 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4725 continue; 4726 params.radar_detect |= 4727 ieee80211_chanctx_radar_detect(local, ctx); 4728 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 4729 params.num_different_channels++; 4730 continue; 4731 } 4732 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4733 cfg80211_chandef_compatible(chandef, 4734 &ctx->conf.def)) 4735 continue; 4736 params.num_different_channels++; 4737 } 4738 4739 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 4740 struct wireless_dev *wdev_iter; 4741 4742 wdev_iter = &sdata_iter->wdev; 4743 4744 if (sdata_iter == sdata || 4745 !ieee80211_sdata_running(sdata_iter) || 4746 cfg80211_iftype_allowed(local->hw.wiphy, 4747 wdev_iter->iftype, 0, 1)) 4748 continue; 4749 4750 params.iftype_num[wdev_iter->iftype]++; 4751 total++; 4752 } 4753 4754 if (total == 1 && !params.radar_detect) 4755 return 0; 4756 4757 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4758 } 4759 4760 static void 4761 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4762 void *data) 4763 { 4764 u32 *max_num_different_channels = data; 4765 4766 *max_num_different_channels = max(*max_num_different_channels, 4767 c->num_different_channels); 4768 } 4769 4770 int ieee80211_max_num_channels(struct ieee80211_local *local) 4771 { 4772 struct ieee80211_sub_if_data *sdata; 4773 struct ieee80211_chanctx *ctx; 4774 u32 max_num_different_channels = 1; 4775 int err; 4776 struct iface_combination_params params = {0}; 4777 4778 lockdep_assert_held(&local->chanctx_mtx); 4779 4780 list_for_each_entry(ctx, &local->chanctx_list, list) { 4781 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4782 continue; 4783 4784 params.num_different_channels++; 4785 4786 params.radar_detect |= 4787 ieee80211_chanctx_radar_detect(local, ctx); 4788 } 4789 4790 list_for_each_entry_rcu(sdata, &local->interfaces, list) 4791 params.iftype_num[sdata->wdev.iftype]++; 4792 4793 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4794 ieee80211_iter_max_chans, 4795 &max_num_different_channels); 4796 if (err < 0) 4797 return err; 4798 4799 return max_num_different_channels; 4800 } 4801 4802 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4803 struct ieee80211_sta_s1g_cap *caps, 4804 struct sk_buff *skb) 4805 { 4806 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4807 struct ieee80211_s1g_cap s1g_capab; 4808 u8 *pos; 4809 int i; 4810 4811 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4812 return; 4813 4814 if (!caps->s1g) 4815 return; 4816 4817 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4818 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4819 4820 /* override the capability info */ 4821 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4822 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4823 4824 s1g_capab.capab_info[i] &= ~mask; 4825 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4826 } 4827 4828 /* then MCS and NSS set */ 4829 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4830 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4831 4832 s1g_capab.supp_mcs_nss[i] &= ~mask; 4833 s1g_capab.supp_mcs_nss[i] |= 4834 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4835 } 4836 4837 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4838 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4839 *pos++ = sizeof(s1g_capab); 4840 4841 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4842 } 4843 4844 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4845 struct sk_buff *skb) 4846 { 4847 u8 *pos = skb_put(skb, 3); 4848 4849 *pos++ = WLAN_EID_AID_REQUEST; 4850 *pos++ = 1; 4851 *pos++ = 0; 4852 } 4853 4854 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4855 { 4856 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4857 *buf++ = 7; /* len */ 4858 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4859 *buf++ = 0x50; 4860 *buf++ = 0xf2; 4861 *buf++ = 2; /* WME */ 4862 *buf++ = 0; /* WME info */ 4863 *buf++ = 1; /* WME ver */ 4864 *buf++ = qosinfo; /* U-APSD no in use */ 4865 4866 return buf; 4867 } 4868 4869 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4870 unsigned long *frame_cnt, 4871 unsigned long *byte_cnt) 4872 { 4873 struct txq_info *txqi = to_txq_info(txq); 4874 u32 frag_cnt = 0, frag_bytes = 0; 4875 struct sk_buff *skb; 4876 4877 skb_queue_walk(&txqi->frags, skb) { 4878 frag_cnt++; 4879 frag_bytes += skb->len; 4880 } 4881 4882 if (frame_cnt) 4883 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4884 4885 if (byte_cnt) 4886 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4887 } 4888 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4889 4890 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4891 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4892 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4893 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4894 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4895 }; 4896 4897 u16 ieee80211_encode_usf(int listen_interval) 4898 { 4899 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4900 u16 ui, usf = 0; 4901 4902 /* find greatest USF */ 4903 while (usf < IEEE80211_MAX_USF) { 4904 if (listen_interval % listen_int_usf[usf + 1]) 4905 break; 4906 usf += 1; 4907 } 4908 ui = listen_interval / listen_int_usf[usf]; 4909 4910 /* error if there is a remainder. Should've been checked by user */ 4911 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4912 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4913 FIELD_PREP(LISTEN_INT_UI, ui); 4914 4915 return (u16) listen_interval; 4916 } 4917 4918 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata, u8 iftype) 4919 { 4920 const struct ieee80211_sta_he_cap *he_cap; 4921 const struct ieee80211_sta_eht_cap *eht_cap; 4922 struct ieee80211_supported_band *sband; 4923 bool is_ap; 4924 u8 n; 4925 4926 sband = ieee80211_get_sband(sdata); 4927 if (!sband) 4928 return 0; 4929 4930 he_cap = ieee80211_get_he_iftype_cap(sband, iftype); 4931 eht_cap = ieee80211_get_eht_iftype_cap(sband, iftype); 4932 if (!he_cap || !eht_cap) 4933 return 0; 4934 4935 is_ap = iftype == NL80211_IFTYPE_AP || 4936 iftype == NL80211_IFTYPE_P2P_GO; 4937 4938 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4939 &eht_cap->eht_cap_elem, 4940 is_ap); 4941 return 2 + 1 + 4942 sizeof(he_cap->he_cap_elem) + n + 4943 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4944 eht_cap->eht_cap_elem.phy_cap_info); 4945 return 0; 4946 } 4947 4948 u8 *ieee80211_ie_build_eht_cap(u8 *pos, 4949 const struct ieee80211_sta_he_cap *he_cap, 4950 const struct ieee80211_sta_eht_cap *eht_cap, 4951 u8 *end, 4952 bool for_ap) 4953 { 4954 u8 mcs_nss_len, ppet_len; 4955 u8 ie_len; 4956 u8 *orig_pos = pos; 4957 4958 /* Make sure we have place for the IE */ 4959 if (!he_cap || !eht_cap) 4960 return orig_pos; 4961 4962 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4963 &eht_cap->eht_cap_elem, 4964 for_ap); 4965 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4966 eht_cap->eht_cap_elem.phy_cap_info); 4967 4968 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4969 if ((end - pos) < ie_len) 4970 return orig_pos; 4971 4972 *pos++ = WLAN_EID_EXTENSION; 4973 *pos++ = ie_len - 2; 4974 *pos++ = WLAN_EID_EXT_EHT_CAPABILITY; 4975 4976 /* Fixed data */ 4977 memcpy(pos, &eht_cap->eht_cap_elem, sizeof(eht_cap->eht_cap_elem)); 4978 pos += sizeof(eht_cap->eht_cap_elem); 4979 4980 memcpy(pos, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4981 pos += mcs_nss_len; 4982 4983 if (ppet_len) { 4984 memcpy(pos, &eht_cap->eht_ppe_thres, ppet_len); 4985 pos += ppet_len; 4986 } 4987 4988 return pos; 4989 } 4990 4991 void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos) 4992 { 4993 unsigned int elem_len; 4994 4995 if (!len_pos) 4996 return; 4997 4998 elem_len = skb->data + skb->len - len_pos - 1; 4999 5000 while (elem_len > 255) { 5001 /* this one is 255 */ 5002 *len_pos = 255; 5003 /* remaining data gets smaller */ 5004 elem_len -= 255; 5005 /* make space for the fragment ID/len in SKB */ 5006 skb_put(skb, 2); 5007 /* shift back the remaining data to place fragment ID/len */ 5008 memmove(len_pos + 255 + 3, len_pos + 255 + 1, elem_len); 5009 /* place the fragment ID */ 5010 len_pos += 255 + 1; 5011 *len_pos = WLAN_EID_FRAGMENT; 5012 /* and point to fragment length to update later */ 5013 len_pos++; 5014 } 5015 5016 *len_pos = elem_len; 5017 } 5018