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