1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2015-2017 Intel Deutschland GmbH 8 * Copyright (C) 2018 Intel Corporation 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * utilities for mac80211 15 */ 16 17 #include <net/mac80211.h> 18 #include <linux/netdevice.h> 19 #include <linux/export.h> 20 #include <linux/types.h> 21 #include <linux/slab.h> 22 #include <linux/skbuff.h> 23 #include <linux/etherdevice.h> 24 #include <linux/if_arp.h> 25 #include <linux/bitmap.h> 26 #include <linux/crc32.h> 27 #include <net/net_namespace.h> 28 #include <net/cfg80211.h> 29 #include <net/rtnetlink.h> 30 31 #include "ieee80211_i.h" 32 #include "driver-ops.h" 33 #include "rate.h" 34 #include "mesh.h" 35 #include "wme.h" 36 #include "led.h" 37 #include "wep.h" 38 39 /* privid for wiphys to determine whether they belong to us or not */ 40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 41 42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 43 { 44 struct ieee80211_local *local; 45 BUG_ON(!wiphy); 46 47 local = wiphy_priv(wiphy); 48 return &local->hw; 49 } 50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 51 52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 53 { 54 struct sk_buff *skb; 55 struct ieee80211_hdr *hdr; 56 57 skb_queue_walk(&tx->skbs, skb) { 58 hdr = (struct ieee80211_hdr *) skb->data; 59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 60 } 61 } 62 63 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 64 int rate, int erp, int short_preamble, 65 int shift) 66 { 67 int dur; 68 69 /* calculate duration (in microseconds, rounded up to next higher 70 * integer if it includes a fractional microsecond) to send frame of 71 * len bytes (does not include FCS) at the given rate. Duration will 72 * also include SIFS. 73 * 74 * rate is in 100 kbps, so divident is multiplied by 10 in the 75 * DIV_ROUND_UP() operations. 76 * 77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 78 * is assumed to be 0 otherwise. 79 */ 80 81 if (band == NL80211_BAND_5GHZ || erp) { 82 /* 83 * OFDM: 84 * 85 * N_DBPS = DATARATE x 4 86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 87 * (16 = SIGNAL time, 6 = tail bits) 88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 89 * 90 * T_SYM = 4 usec 91 * 802.11a - 18.5.2: aSIFSTime = 16 usec 92 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 93 * signal ext = 6 usec 94 */ 95 dur = 16; /* SIFS + signal ext */ 96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 98 99 /* IEEE 802.11-2012 18.3.2.4: all values above are: 100 * * times 4 for 5 MHz 101 * * times 2 for 10 MHz 102 */ 103 dur *= 1 << shift; 104 105 /* rates should already consider the channel bandwidth, 106 * don't apply divisor again. 107 */ 108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 109 4 * rate); /* T_SYM x N_SYM */ 110 } else { 111 /* 112 * 802.11b or 802.11g with 802.11b compatibility: 113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 115 * 116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 117 * aSIFSTime = 10 usec 118 * aPreambleLength = 144 usec or 72 usec with short preamble 119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 120 */ 121 dur = 10; /* aSIFSTime = 10 usec */ 122 dur += short_preamble ? (72 + 24) : (144 + 48); 123 124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 125 } 126 127 return dur; 128 } 129 130 /* Exported duration function for driver use */ 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 132 struct ieee80211_vif *vif, 133 enum nl80211_band band, 134 size_t frame_len, 135 struct ieee80211_rate *rate) 136 { 137 struct ieee80211_sub_if_data *sdata; 138 u16 dur; 139 int erp, shift = 0; 140 bool short_preamble = false; 141 142 erp = 0; 143 if (vif) { 144 sdata = vif_to_sdata(vif); 145 short_preamble = sdata->vif.bss_conf.use_short_preamble; 146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 147 erp = rate->flags & IEEE80211_RATE_ERP_G; 148 shift = ieee80211_vif_get_shift(vif); 149 } 150 151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 152 short_preamble, shift); 153 154 return cpu_to_le16(dur); 155 } 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 157 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 159 struct ieee80211_vif *vif, size_t frame_len, 160 const struct ieee80211_tx_info *frame_txctl) 161 { 162 struct ieee80211_local *local = hw_to_local(hw); 163 struct ieee80211_rate *rate; 164 struct ieee80211_sub_if_data *sdata; 165 bool short_preamble; 166 int erp, shift = 0, bitrate; 167 u16 dur; 168 struct ieee80211_supported_band *sband; 169 170 sband = local->hw.wiphy->bands[frame_txctl->band]; 171 172 short_preamble = false; 173 174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 175 176 erp = 0; 177 if (vif) { 178 sdata = vif_to_sdata(vif); 179 short_preamble = sdata->vif.bss_conf.use_short_preamble; 180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 181 erp = rate->flags & IEEE80211_RATE_ERP_G; 182 shift = ieee80211_vif_get_shift(vif); 183 } 184 185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 186 187 /* CTS duration */ 188 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 189 erp, short_preamble, shift); 190 /* Data frame duration */ 191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 192 erp, short_preamble, shift); 193 /* ACK duration */ 194 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 195 erp, short_preamble, shift); 196 197 return cpu_to_le16(dur); 198 } 199 EXPORT_SYMBOL(ieee80211_rts_duration); 200 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 202 struct ieee80211_vif *vif, 203 size_t frame_len, 204 const struct ieee80211_tx_info *frame_txctl) 205 { 206 struct ieee80211_local *local = hw_to_local(hw); 207 struct ieee80211_rate *rate; 208 struct ieee80211_sub_if_data *sdata; 209 bool short_preamble; 210 int erp, shift = 0, bitrate; 211 u16 dur; 212 struct ieee80211_supported_band *sband; 213 214 sband = local->hw.wiphy->bands[frame_txctl->band]; 215 216 short_preamble = false; 217 218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 219 erp = 0; 220 if (vif) { 221 sdata = vif_to_sdata(vif); 222 short_preamble = sdata->vif.bss_conf.use_short_preamble; 223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 224 erp = rate->flags & IEEE80211_RATE_ERP_G; 225 shift = ieee80211_vif_get_shift(vif); 226 } 227 228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 229 230 /* Data frame duration */ 231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 232 erp, short_preamble, shift); 233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 234 /* ACK duration */ 235 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 236 erp, short_preamble, shift); 237 } 238 239 return cpu_to_le16(dur); 240 } 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 242 243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 244 { 245 struct ieee80211_local *local = sdata->local; 246 struct ieee80211_vif *vif = &sdata->vif; 247 struct fq *fq = &local->fq; 248 struct ps_data *ps = NULL; 249 struct txq_info *txqi; 250 struct sta_info *sta; 251 int i; 252 253 spin_lock_bh(&fq->lock); 254 255 if (sdata->vif.type == NL80211_IFTYPE_AP) 256 ps = &sdata->bss->ps; 257 258 sdata->vif.txqs_stopped[ac] = false; 259 260 list_for_each_entry_rcu(sta, &local->sta_list, list) { 261 if (sdata != sta->sdata) 262 continue; 263 264 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 265 struct ieee80211_txq *txq = sta->sta.txq[i]; 266 267 if (!txq) 268 continue; 269 270 txqi = to_txq_info(txq); 271 272 if (ac != txq->ac) 273 continue; 274 275 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 276 &txqi->flags)) 277 continue; 278 279 spin_unlock_bh(&fq->lock); 280 drv_wake_tx_queue(local, txqi); 281 spin_lock_bh(&fq->lock); 282 } 283 } 284 285 if (!vif->txq) 286 goto out; 287 288 txqi = to_txq_info(vif->txq); 289 290 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 291 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 292 goto out; 293 294 spin_unlock_bh(&fq->lock); 295 296 drv_wake_tx_queue(local, txqi); 297 return; 298 out: 299 spin_unlock_bh(&fq->lock); 300 } 301 302 static void 303 __releases(&local->queue_stop_reason_lock) 304 __acquires(&local->queue_stop_reason_lock) 305 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 306 { 307 struct ieee80211_sub_if_data *sdata; 308 int n_acs = IEEE80211_NUM_ACS; 309 int i; 310 311 rcu_read_lock(); 312 313 if (local->hw.queues < IEEE80211_NUM_ACS) 314 n_acs = 1; 315 316 for (i = 0; i < local->hw.queues; i++) { 317 if (local->queue_stop_reasons[i]) 318 continue; 319 320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 321 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 322 int ac; 323 324 for (ac = 0; ac < n_acs; ac++) { 325 int ac_queue = sdata->vif.hw_queue[ac]; 326 327 if (ac_queue == i || 328 sdata->vif.cab_queue == i) 329 __ieee80211_wake_txqs(sdata, ac); 330 } 331 } 332 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 333 } 334 335 rcu_read_unlock(); 336 } 337 338 void ieee80211_wake_txqs(unsigned long data) 339 { 340 struct ieee80211_local *local = (struct ieee80211_local *)data; 341 unsigned long flags; 342 343 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 344 _ieee80211_wake_txqs(local, &flags); 345 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 346 } 347 348 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 349 { 350 struct ieee80211_sub_if_data *sdata; 351 int n_acs = IEEE80211_NUM_ACS; 352 353 if (local->ops->wake_tx_queue) 354 return; 355 356 if (local->hw.queues < IEEE80211_NUM_ACS) 357 n_acs = 1; 358 359 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 360 int ac; 361 362 if (!sdata->dev) 363 continue; 364 365 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 366 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 367 continue; 368 369 for (ac = 0; ac < n_acs; ac++) { 370 int ac_queue = sdata->vif.hw_queue[ac]; 371 372 if (ac_queue == queue || 373 (sdata->vif.cab_queue == queue && 374 local->queue_stop_reasons[ac_queue] == 0 && 375 skb_queue_empty(&local->pending[ac_queue]))) 376 netif_wake_subqueue(sdata->dev, ac); 377 } 378 } 379 } 380 381 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 382 enum queue_stop_reason reason, 383 bool refcounted, 384 unsigned long *flags) 385 { 386 struct ieee80211_local *local = hw_to_local(hw); 387 388 trace_wake_queue(local, queue, reason); 389 390 if (WARN_ON(queue >= hw->queues)) 391 return; 392 393 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 394 return; 395 396 if (!refcounted) { 397 local->q_stop_reasons[queue][reason] = 0; 398 } else { 399 local->q_stop_reasons[queue][reason]--; 400 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 401 local->q_stop_reasons[queue][reason] = 0; 402 } 403 404 if (local->q_stop_reasons[queue][reason] == 0) 405 __clear_bit(reason, &local->queue_stop_reasons[queue]); 406 407 if (local->queue_stop_reasons[queue] != 0) 408 /* someone still has this queue stopped */ 409 return; 410 411 if (skb_queue_empty(&local->pending[queue])) { 412 rcu_read_lock(); 413 ieee80211_propagate_queue_wake(local, queue); 414 rcu_read_unlock(); 415 } else 416 tasklet_schedule(&local->tx_pending_tasklet); 417 418 /* 419 * Calling _ieee80211_wake_txqs here can be a problem because it may 420 * release queue_stop_reason_lock which has been taken by 421 * __ieee80211_wake_queue's caller. It is certainly not very nice to 422 * release someone's lock, but it is fine because all the callers of 423 * __ieee80211_wake_queue call it right before releasing the lock. 424 */ 425 if (local->ops->wake_tx_queue) { 426 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 427 tasklet_schedule(&local->wake_txqs_tasklet); 428 else 429 _ieee80211_wake_txqs(local, flags); 430 } 431 } 432 433 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 434 enum queue_stop_reason reason, 435 bool refcounted) 436 { 437 struct ieee80211_local *local = hw_to_local(hw); 438 unsigned long flags; 439 440 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 441 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 442 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 443 } 444 445 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 446 { 447 ieee80211_wake_queue_by_reason(hw, queue, 448 IEEE80211_QUEUE_STOP_REASON_DRIVER, 449 false); 450 } 451 EXPORT_SYMBOL(ieee80211_wake_queue); 452 453 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 454 enum queue_stop_reason reason, 455 bool refcounted) 456 { 457 struct ieee80211_local *local = hw_to_local(hw); 458 struct ieee80211_sub_if_data *sdata; 459 int n_acs = IEEE80211_NUM_ACS; 460 461 trace_stop_queue(local, queue, reason); 462 463 if (WARN_ON(queue >= hw->queues)) 464 return; 465 466 if (!refcounted) 467 local->q_stop_reasons[queue][reason] = 1; 468 else 469 local->q_stop_reasons[queue][reason]++; 470 471 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 472 return; 473 474 if (local->hw.queues < IEEE80211_NUM_ACS) 475 n_acs = 1; 476 477 rcu_read_lock(); 478 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 479 int ac; 480 481 if (!sdata->dev) 482 continue; 483 484 for (ac = 0; ac < n_acs; ac++) { 485 if (sdata->vif.hw_queue[ac] == queue || 486 sdata->vif.cab_queue == queue) { 487 if (!local->ops->wake_tx_queue) { 488 netif_stop_subqueue(sdata->dev, ac); 489 continue; 490 } 491 spin_lock(&local->fq.lock); 492 sdata->vif.txqs_stopped[ac] = true; 493 spin_unlock(&local->fq.lock); 494 } 495 } 496 } 497 rcu_read_unlock(); 498 } 499 500 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 501 enum queue_stop_reason reason, 502 bool refcounted) 503 { 504 struct ieee80211_local *local = hw_to_local(hw); 505 unsigned long flags; 506 507 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 508 __ieee80211_stop_queue(hw, queue, reason, refcounted); 509 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 510 } 511 512 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 513 { 514 ieee80211_stop_queue_by_reason(hw, queue, 515 IEEE80211_QUEUE_STOP_REASON_DRIVER, 516 false); 517 } 518 EXPORT_SYMBOL(ieee80211_stop_queue); 519 520 void ieee80211_add_pending_skb(struct ieee80211_local *local, 521 struct sk_buff *skb) 522 { 523 struct ieee80211_hw *hw = &local->hw; 524 unsigned long flags; 525 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 526 int queue = info->hw_queue; 527 528 if (WARN_ON(!info->control.vif)) { 529 ieee80211_free_txskb(&local->hw, skb); 530 return; 531 } 532 533 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 534 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 535 false); 536 __skb_queue_tail(&local->pending[queue], skb); 537 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 538 false, &flags); 539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 540 } 541 542 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 543 struct sk_buff_head *skbs) 544 { 545 struct ieee80211_hw *hw = &local->hw; 546 struct sk_buff *skb; 547 unsigned long flags; 548 int queue, i; 549 550 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 551 while ((skb = skb_dequeue(skbs))) { 552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 553 554 if (WARN_ON(!info->control.vif)) { 555 ieee80211_free_txskb(&local->hw, skb); 556 continue; 557 } 558 559 queue = info->hw_queue; 560 561 __ieee80211_stop_queue(hw, queue, 562 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 563 false); 564 565 __skb_queue_tail(&local->pending[queue], skb); 566 } 567 568 for (i = 0; i < hw->queues; i++) 569 __ieee80211_wake_queue(hw, i, 570 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 571 false, &flags); 572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 573 } 574 575 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 576 unsigned long queues, 577 enum queue_stop_reason reason, 578 bool refcounted) 579 { 580 struct ieee80211_local *local = hw_to_local(hw); 581 unsigned long flags; 582 int i; 583 584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 585 586 for_each_set_bit(i, &queues, hw->queues) 587 __ieee80211_stop_queue(hw, i, reason, refcounted); 588 589 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 590 } 591 592 void ieee80211_stop_queues(struct ieee80211_hw *hw) 593 { 594 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 595 IEEE80211_QUEUE_STOP_REASON_DRIVER, 596 false); 597 } 598 EXPORT_SYMBOL(ieee80211_stop_queues); 599 600 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 601 { 602 struct ieee80211_local *local = hw_to_local(hw); 603 unsigned long flags; 604 int ret; 605 606 if (WARN_ON(queue >= hw->queues)) 607 return true; 608 609 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 610 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 611 &local->queue_stop_reasons[queue]); 612 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 613 return ret; 614 } 615 EXPORT_SYMBOL(ieee80211_queue_stopped); 616 617 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 618 unsigned long queues, 619 enum queue_stop_reason reason, 620 bool refcounted) 621 { 622 struct ieee80211_local *local = hw_to_local(hw); 623 unsigned long flags; 624 int i; 625 626 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 627 628 for_each_set_bit(i, &queues, hw->queues) 629 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 630 631 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 632 } 633 634 void ieee80211_wake_queues(struct ieee80211_hw *hw) 635 { 636 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 637 IEEE80211_QUEUE_STOP_REASON_DRIVER, 638 false); 639 } 640 EXPORT_SYMBOL(ieee80211_wake_queues); 641 642 static unsigned int 643 ieee80211_get_vif_queues(struct ieee80211_local *local, 644 struct ieee80211_sub_if_data *sdata) 645 { 646 unsigned int queues; 647 648 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 649 int ac; 650 651 queues = 0; 652 653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 654 queues |= BIT(sdata->vif.hw_queue[ac]); 655 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 656 queues |= BIT(sdata->vif.cab_queue); 657 } else { 658 /* all queues */ 659 queues = BIT(local->hw.queues) - 1; 660 } 661 662 return queues; 663 } 664 665 void __ieee80211_flush_queues(struct ieee80211_local *local, 666 struct ieee80211_sub_if_data *sdata, 667 unsigned int queues, bool drop) 668 { 669 if (!local->ops->flush) 670 return; 671 672 /* 673 * If no queue was set, or if the HW doesn't support 674 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 675 */ 676 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 677 queues = ieee80211_get_vif_queues(local, sdata); 678 679 ieee80211_stop_queues_by_reason(&local->hw, queues, 680 IEEE80211_QUEUE_STOP_REASON_FLUSH, 681 false); 682 683 drv_flush(local, sdata, queues, drop); 684 685 ieee80211_wake_queues_by_reason(&local->hw, queues, 686 IEEE80211_QUEUE_STOP_REASON_FLUSH, 687 false); 688 } 689 690 void ieee80211_flush_queues(struct ieee80211_local *local, 691 struct ieee80211_sub_if_data *sdata, bool drop) 692 { 693 __ieee80211_flush_queues(local, sdata, 0, drop); 694 } 695 696 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 697 struct ieee80211_sub_if_data *sdata, 698 enum queue_stop_reason reason) 699 { 700 ieee80211_stop_queues_by_reason(&local->hw, 701 ieee80211_get_vif_queues(local, sdata), 702 reason, true); 703 } 704 705 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 706 struct ieee80211_sub_if_data *sdata, 707 enum queue_stop_reason reason) 708 { 709 ieee80211_wake_queues_by_reason(&local->hw, 710 ieee80211_get_vif_queues(local, sdata), 711 reason, true); 712 } 713 714 static void __iterate_interfaces(struct ieee80211_local *local, 715 u32 iter_flags, 716 void (*iterator)(void *data, u8 *mac, 717 struct ieee80211_vif *vif), 718 void *data) 719 { 720 struct ieee80211_sub_if_data *sdata; 721 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 722 723 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 724 switch (sdata->vif.type) { 725 case NL80211_IFTYPE_MONITOR: 726 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 727 continue; 728 break; 729 case NL80211_IFTYPE_AP_VLAN: 730 continue; 731 default: 732 break; 733 } 734 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 735 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 736 continue; 737 if (ieee80211_sdata_running(sdata) || !active_only) 738 iterator(data, sdata->vif.addr, 739 &sdata->vif); 740 } 741 742 sdata = rcu_dereference_check(local->monitor_sdata, 743 lockdep_is_held(&local->iflist_mtx) || 744 lockdep_rtnl_is_held()); 745 if (sdata && 746 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 747 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 748 iterator(data, sdata->vif.addr, &sdata->vif); 749 } 750 751 void ieee80211_iterate_interfaces( 752 struct ieee80211_hw *hw, u32 iter_flags, 753 void (*iterator)(void *data, u8 *mac, 754 struct ieee80211_vif *vif), 755 void *data) 756 { 757 struct ieee80211_local *local = hw_to_local(hw); 758 759 mutex_lock(&local->iflist_mtx); 760 __iterate_interfaces(local, iter_flags, iterator, data); 761 mutex_unlock(&local->iflist_mtx); 762 } 763 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 764 765 void ieee80211_iterate_active_interfaces_atomic( 766 struct ieee80211_hw *hw, u32 iter_flags, 767 void (*iterator)(void *data, u8 *mac, 768 struct ieee80211_vif *vif), 769 void *data) 770 { 771 struct ieee80211_local *local = hw_to_local(hw); 772 773 rcu_read_lock(); 774 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 775 iterator, data); 776 rcu_read_unlock(); 777 } 778 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 779 780 void ieee80211_iterate_active_interfaces_rtnl( 781 struct ieee80211_hw *hw, u32 iter_flags, 782 void (*iterator)(void *data, u8 *mac, 783 struct ieee80211_vif *vif), 784 void *data) 785 { 786 struct ieee80211_local *local = hw_to_local(hw); 787 788 ASSERT_RTNL(); 789 790 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 791 iterator, data); 792 } 793 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 794 795 static void __iterate_stations(struct ieee80211_local *local, 796 void (*iterator)(void *data, 797 struct ieee80211_sta *sta), 798 void *data) 799 { 800 struct sta_info *sta; 801 802 list_for_each_entry_rcu(sta, &local->sta_list, list) { 803 if (!sta->uploaded) 804 continue; 805 806 iterator(data, &sta->sta); 807 } 808 } 809 810 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 811 void (*iterator)(void *data, 812 struct ieee80211_sta *sta), 813 void *data) 814 { 815 struct ieee80211_local *local = hw_to_local(hw); 816 817 rcu_read_lock(); 818 __iterate_stations(local, iterator, data); 819 rcu_read_unlock(); 820 } 821 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 822 823 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 824 { 825 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 826 827 if (!ieee80211_sdata_running(sdata) || 828 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 829 return NULL; 830 return &sdata->vif; 831 } 832 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 833 834 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 835 { 836 struct ieee80211_sub_if_data *sdata; 837 838 if (!vif) 839 return NULL; 840 841 sdata = vif_to_sdata(vif); 842 843 if (!ieee80211_sdata_running(sdata) || 844 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 845 return NULL; 846 847 return &sdata->wdev; 848 } 849 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 850 851 /* 852 * Nothing should have been stuffed into the workqueue during 853 * the suspend->resume cycle. Since we can't check each caller 854 * of this function if we are already quiescing / suspended, 855 * check here and don't WARN since this can actually happen when 856 * the rx path (for example) is racing against __ieee80211_suspend 857 * and suspending / quiescing was set after the rx path checked 858 * them. 859 */ 860 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 861 { 862 if (local->quiescing || (local->suspended && !local->resuming)) { 863 pr_warn("queueing ieee80211 work while going to suspend\n"); 864 return false; 865 } 866 867 return true; 868 } 869 870 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 871 { 872 struct ieee80211_local *local = hw_to_local(hw); 873 874 if (!ieee80211_can_queue_work(local)) 875 return; 876 877 queue_work(local->workqueue, work); 878 } 879 EXPORT_SYMBOL(ieee80211_queue_work); 880 881 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 882 struct delayed_work *dwork, 883 unsigned long delay) 884 { 885 struct ieee80211_local *local = hw_to_local(hw); 886 887 if (!ieee80211_can_queue_work(local)) 888 return; 889 890 queue_delayed_work(local->workqueue, dwork, delay); 891 } 892 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 893 894 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 895 struct ieee802_11_elems *elems, 896 u64 filter, u32 crc) 897 { 898 size_t left = len; 899 const u8 *pos = start; 900 bool calc_crc = filter != 0; 901 DECLARE_BITMAP(seen_elems, 256); 902 const u8 *ie; 903 904 bitmap_zero(seen_elems, 256); 905 memset(elems, 0, sizeof(*elems)); 906 elems->ie_start = start; 907 elems->total_len = len; 908 909 while (left >= 2) { 910 u8 id, elen; 911 bool elem_parse_failed; 912 913 id = *pos++; 914 elen = *pos++; 915 left -= 2; 916 917 if (elen > left) { 918 elems->parse_error = true; 919 break; 920 } 921 922 switch (id) { 923 case WLAN_EID_SSID: 924 case WLAN_EID_SUPP_RATES: 925 case WLAN_EID_FH_PARAMS: 926 case WLAN_EID_DS_PARAMS: 927 case WLAN_EID_CF_PARAMS: 928 case WLAN_EID_TIM: 929 case WLAN_EID_IBSS_PARAMS: 930 case WLAN_EID_CHALLENGE: 931 case WLAN_EID_RSN: 932 case WLAN_EID_ERP_INFO: 933 case WLAN_EID_EXT_SUPP_RATES: 934 case WLAN_EID_HT_CAPABILITY: 935 case WLAN_EID_HT_OPERATION: 936 case WLAN_EID_VHT_CAPABILITY: 937 case WLAN_EID_VHT_OPERATION: 938 case WLAN_EID_MESH_ID: 939 case WLAN_EID_MESH_CONFIG: 940 case WLAN_EID_PEER_MGMT: 941 case WLAN_EID_PREQ: 942 case WLAN_EID_PREP: 943 case WLAN_EID_PERR: 944 case WLAN_EID_RANN: 945 case WLAN_EID_CHANNEL_SWITCH: 946 case WLAN_EID_EXT_CHANSWITCH_ANN: 947 case WLAN_EID_COUNTRY: 948 case WLAN_EID_PWR_CONSTRAINT: 949 case WLAN_EID_TIMEOUT_INTERVAL: 950 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 951 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 952 case WLAN_EID_CHAN_SWITCH_PARAM: 953 case WLAN_EID_EXT_CAPABILITY: 954 case WLAN_EID_CHAN_SWITCH_TIMING: 955 case WLAN_EID_LINK_ID: 956 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 957 /* 958 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 959 * that if the content gets bigger it might be needed more than once 960 */ 961 if (test_bit(id, seen_elems)) { 962 elems->parse_error = true; 963 left -= elen; 964 pos += elen; 965 continue; 966 } 967 break; 968 } 969 970 if (calc_crc && id < 64 && (filter & (1ULL << id))) 971 crc = crc32_be(crc, pos - 2, elen + 2); 972 973 elem_parse_failed = false; 974 975 switch (id) { 976 case WLAN_EID_LINK_ID: 977 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 978 elem_parse_failed = true; 979 break; 980 } 981 elems->lnk_id = (void *)(pos - 2); 982 break; 983 case WLAN_EID_CHAN_SWITCH_TIMING: 984 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 985 elem_parse_failed = true; 986 break; 987 } 988 elems->ch_sw_timing = (void *)pos; 989 break; 990 case WLAN_EID_EXT_CAPABILITY: 991 elems->ext_capab = pos; 992 elems->ext_capab_len = elen; 993 break; 994 case WLAN_EID_SSID: 995 elems->ssid = pos; 996 elems->ssid_len = elen; 997 break; 998 case WLAN_EID_SUPP_RATES: 999 elems->supp_rates = pos; 1000 elems->supp_rates_len = elen; 1001 break; 1002 case WLAN_EID_DS_PARAMS: 1003 if (elen >= 1) 1004 elems->ds_params = pos; 1005 else 1006 elem_parse_failed = true; 1007 break; 1008 case WLAN_EID_TIM: 1009 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1010 elems->tim = (void *)pos; 1011 elems->tim_len = elen; 1012 } else 1013 elem_parse_failed = true; 1014 break; 1015 case WLAN_EID_CHALLENGE: 1016 elems->challenge = pos; 1017 elems->challenge_len = elen; 1018 break; 1019 case WLAN_EID_VENDOR_SPECIFIC: 1020 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1021 pos[2] == 0xf2) { 1022 /* Microsoft OUI (00:50:F2) */ 1023 1024 if (calc_crc) 1025 crc = crc32_be(crc, pos - 2, elen + 2); 1026 1027 if (elen >= 5 && pos[3] == 2) { 1028 /* OUI Type 2 - WMM IE */ 1029 if (pos[4] == 0) { 1030 elems->wmm_info = pos; 1031 elems->wmm_info_len = elen; 1032 } else if (pos[4] == 1) { 1033 elems->wmm_param = pos; 1034 elems->wmm_param_len = elen; 1035 } 1036 } 1037 } 1038 break; 1039 case WLAN_EID_RSN: 1040 elems->rsn = pos; 1041 elems->rsn_len = elen; 1042 break; 1043 case WLAN_EID_ERP_INFO: 1044 if (elen >= 1) 1045 elems->erp_info = pos; 1046 else 1047 elem_parse_failed = true; 1048 break; 1049 case WLAN_EID_EXT_SUPP_RATES: 1050 elems->ext_supp_rates = pos; 1051 elems->ext_supp_rates_len = elen; 1052 break; 1053 case WLAN_EID_HT_CAPABILITY: 1054 if (elen >= sizeof(struct ieee80211_ht_cap)) 1055 elems->ht_cap_elem = (void *)pos; 1056 else 1057 elem_parse_failed = true; 1058 break; 1059 case WLAN_EID_HT_OPERATION: 1060 if (elen >= sizeof(struct ieee80211_ht_operation)) 1061 elems->ht_operation = (void *)pos; 1062 else 1063 elem_parse_failed = true; 1064 break; 1065 case WLAN_EID_VHT_CAPABILITY: 1066 if (elen >= sizeof(struct ieee80211_vht_cap)) 1067 elems->vht_cap_elem = (void *)pos; 1068 else 1069 elem_parse_failed = true; 1070 break; 1071 case WLAN_EID_VHT_OPERATION: 1072 if (elen >= sizeof(struct ieee80211_vht_operation)) 1073 elems->vht_operation = (void *)pos; 1074 else 1075 elem_parse_failed = true; 1076 break; 1077 case WLAN_EID_OPMODE_NOTIF: 1078 if (elen > 0) 1079 elems->opmode_notif = pos; 1080 else 1081 elem_parse_failed = true; 1082 break; 1083 case WLAN_EID_MESH_ID: 1084 elems->mesh_id = pos; 1085 elems->mesh_id_len = elen; 1086 break; 1087 case WLAN_EID_MESH_CONFIG: 1088 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1089 elems->mesh_config = (void *)pos; 1090 else 1091 elem_parse_failed = true; 1092 break; 1093 case WLAN_EID_PEER_MGMT: 1094 elems->peering = pos; 1095 elems->peering_len = elen; 1096 break; 1097 case WLAN_EID_MESH_AWAKE_WINDOW: 1098 if (elen >= 2) 1099 elems->awake_window = (void *)pos; 1100 break; 1101 case WLAN_EID_PREQ: 1102 elems->preq = pos; 1103 elems->preq_len = elen; 1104 break; 1105 case WLAN_EID_PREP: 1106 elems->prep = pos; 1107 elems->prep_len = elen; 1108 break; 1109 case WLAN_EID_PERR: 1110 elems->perr = pos; 1111 elems->perr_len = elen; 1112 break; 1113 case WLAN_EID_RANN: 1114 if (elen >= sizeof(struct ieee80211_rann_ie)) 1115 elems->rann = (void *)pos; 1116 else 1117 elem_parse_failed = true; 1118 break; 1119 case WLAN_EID_CHANNEL_SWITCH: 1120 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1121 elem_parse_failed = true; 1122 break; 1123 } 1124 elems->ch_switch_ie = (void *)pos; 1125 break; 1126 case WLAN_EID_EXT_CHANSWITCH_ANN: 1127 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1128 elem_parse_failed = true; 1129 break; 1130 } 1131 elems->ext_chansw_ie = (void *)pos; 1132 break; 1133 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1134 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1135 elem_parse_failed = true; 1136 break; 1137 } 1138 elems->sec_chan_offs = (void *)pos; 1139 break; 1140 case WLAN_EID_CHAN_SWITCH_PARAM: 1141 if (elen != 1142 sizeof(*elems->mesh_chansw_params_ie)) { 1143 elem_parse_failed = true; 1144 break; 1145 } 1146 elems->mesh_chansw_params_ie = (void *)pos; 1147 break; 1148 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1149 if (!action || 1150 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1151 elem_parse_failed = true; 1152 break; 1153 } 1154 elems->wide_bw_chansw_ie = (void *)pos; 1155 break; 1156 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1157 if (action) { 1158 elem_parse_failed = true; 1159 break; 1160 } 1161 /* 1162 * This is a bit tricky, but as we only care about 1163 * the wide bandwidth channel switch element, so 1164 * just parse it out manually. 1165 */ 1166 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1167 pos, elen); 1168 if (ie) { 1169 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1170 elems->wide_bw_chansw_ie = 1171 (void *)(ie + 2); 1172 else 1173 elem_parse_failed = true; 1174 } 1175 break; 1176 case WLAN_EID_COUNTRY: 1177 elems->country_elem = pos; 1178 elems->country_elem_len = elen; 1179 break; 1180 case WLAN_EID_PWR_CONSTRAINT: 1181 if (elen != 1) { 1182 elem_parse_failed = true; 1183 break; 1184 } 1185 elems->pwr_constr_elem = pos; 1186 break; 1187 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1188 /* Lots of different options exist, but we only care 1189 * about the Dynamic Transmit Power Control element. 1190 * First check for the Cisco OUI, then for the DTPC 1191 * tag (0x00). 1192 */ 1193 if (elen < 4) { 1194 elem_parse_failed = true; 1195 break; 1196 } 1197 1198 if (pos[0] != 0x00 || pos[1] != 0x40 || 1199 pos[2] != 0x96 || pos[3] != 0x00) 1200 break; 1201 1202 if (elen != 6) { 1203 elem_parse_failed = true; 1204 break; 1205 } 1206 1207 if (calc_crc) 1208 crc = crc32_be(crc, pos - 2, elen + 2); 1209 1210 elems->cisco_dtpc_elem = pos; 1211 break; 1212 case WLAN_EID_TIMEOUT_INTERVAL: 1213 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1214 elems->timeout_int = (void *)pos; 1215 else 1216 elem_parse_failed = true; 1217 break; 1218 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1219 if (elen >= sizeof(*elems->max_idle_period_ie)) 1220 elems->max_idle_period_ie = (void *)pos; 1221 break; 1222 case WLAN_EID_EXTENSION: 1223 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA && 1224 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) { 1225 elems->mu_edca_param_set = (void *)&pos[1]; 1226 if (calc_crc) 1227 crc = crc32_be(crc, pos - 2, elen + 2); 1228 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) { 1229 elems->he_cap = (void *)&pos[1]; 1230 elems->he_cap_len = elen - 1; 1231 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION && 1232 elen >= sizeof(*elems->he_operation) && 1233 elen >= ieee80211_he_oper_size(&pos[1])) { 1234 elems->he_operation = (void *)&pos[1]; 1235 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) { 1236 elems->uora_element = (void *)&pos[1]; 1237 } 1238 break; 1239 default: 1240 break; 1241 } 1242 1243 if (elem_parse_failed) 1244 elems->parse_error = true; 1245 else 1246 __set_bit(id, seen_elems); 1247 1248 left -= elen; 1249 pos += elen; 1250 } 1251 1252 if (left != 0) 1253 elems->parse_error = true; 1254 1255 return crc; 1256 } 1257 1258 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1259 struct ieee80211_tx_queue_params 1260 *qparam, int ac) 1261 { 1262 struct ieee80211_chanctx_conf *chanctx_conf; 1263 const struct ieee80211_reg_rule *rrule; 1264 const struct ieee80211_wmm_ac *wmm_ac; 1265 u16 center_freq = 0; 1266 1267 if (sdata->vif.type != NL80211_IFTYPE_AP && 1268 sdata->vif.type != NL80211_IFTYPE_STATION) 1269 return; 1270 1271 rcu_read_lock(); 1272 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1273 if (chanctx_conf) 1274 center_freq = chanctx_conf->def.chan->center_freq; 1275 1276 if (!center_freq) { 1277 rcu_read_unlock(); 1278 return; 1279 } 1280 1281 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1282 1283 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1284 rcu_read_unlock(); 1285 return; 1286 } 1287 1288 if (sdata->vif.type == NL80211_IFTYPE_AP) 1289 wmm_ac = &rrule->wmm_rule.ap[ac]; 1290 else 1291 wmm_ac = &rrule->wmm_rule.client[ac]; 1292 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1293 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1294 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1295 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1296 rcu_read_unlock(); 1297 } 1298 1299 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1300 bool bss_notify, bool enable_qos) 1301 { 1302 struct ieee80211_local *local = sdata->local; 1303 struct ieee80211_tx_queue_params qparam; 1304 struct ieee80211_chanctx_conf *chanctx_conf; 1305 int ac; 1306 bool use_11b; 1307 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1308 int aCWmin, aCWmax; 1309 1310 if (!local->ops->conf_tx) 1311 return; 1312 1313 if (local->hw.queues < IEEE80211_NUM_ACS) 1314 return; 1315 1316 memset(&qparam, 0, sizeof(qparam)); 1317 1318 rcu_read_lock(); 1319 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1320 use_11b = (chanctx_conf && 1321 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1322 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1323 rcu_read_unlock(); 1324 1325 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1326 1327 /* Set defaults according to 802.11-2007 Table 7-37 */ 1328 aCWmax = 1023; 1329 if (use_11b) 1330 aCWmin = 31; 1331 else 1332 aCWmin = 15; 1333 1334 /* Confiure old 802.11b/g medium access rules. */ 1335 qparam.cw_max = aCWmax; 1336 qparam.cw_min = aCWmin; 1337 qparam.txop = 0; 1338 qparam.aifs = 2; 1339 1340 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1341 /* Update if QoS is enabled. */ 1342 if (enable_qos) { 1343 switch (ac) { 1344 case IEEE80211_AC_BK: 1345 qparam.cw_max = aCWmax; 1346 qparam.cw_min = aCWmin; 1347 qparam.txop = 0; 1348 if (is_ocb) 1349 qparam.aifs = 9; 1350 else 1351 qparam.aifs = 7; 1352 break; 1353 /* never happens but let's not leave undefined */ 1354 default: 1355 case IEEE80211_AC_BE: 1356 qparam.cw_max = aCWmax; 1357 qparam.cw_min = aCWmin; 1358 qparam.txop = 0; 1359 if (is_ocb) 1360 qparam.aifs = 6; 1361 else 1362 qparam.aifs = 3; 1363 break; 1364 case IEEE80211_AC_VI: 1365 qparam.cw_max = aCWmin; 1366 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1367 if (is_ocb) 1368 qparam.txop = 0; 1369 else if (use_11b) 1370 qparam.txop = 6016/32; 1371 else 1372 qparam.txop = 3008/32; 1373 1374 if (is_ocb) 1375 qparam.aifs = 3; 1376 else 1377 qparam.aifs = 2; 1378 break; 1379 case IEEE80211_AC_VO: 1380 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1381 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1382 if (is_ocb) 1383 qparam.txop = 0; 1384 else if (use_11b) 1385 qparam.txop = 3264/32; 1386 else 1387 qparam.txop = 1504/32; 1388 qparam.aifs = 2; 1389 break; 1390 } 1391 } 1392 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1393 1394 qparam.uapsd = false; 1395 1396 sdata->tx_conf[ac] = qparam; 1397 drv_conf_tx(local, sdata, ac, &qparam); 1398 } 1399 1400 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1401 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1402 sdata->vif.type != NL80211_IFTYPE_NAN) { 1403 sdata->vif.bss_conf.qos = enable_qos; 1404 if (bss_notify) 1405 ieee80211_bss_info_change_notify(sdata, 1406 BSS_CHANGED_QOS); 1407 } 1408 } 1409 1410 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1411 u16 transaction, u16 auth_alg, u16 status, 1412 const u8 *extra, size_t extra_len, const u8 *da, 1413 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1414 u32 tx_flags) 1415 { 1416 struct ieee80211_local *local = sdata->local; 1417 struct sk_buff *skb; 1418 struct ieee80211_mgmt *mgmt; 1419 int err; 1420 1421 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1422 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1423 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1424 if (!skb) 1425 return; 1426 1427 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1428 1429 mgmt = skb_put_zero(skb, 24 + 6); 1430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1431 IEEE80211_STYPE_AUTH); 1432 memcpy(mgmt->da, da, ETH_ALEN); 1433 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1434 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1435 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1436 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1437 mgmt->u.auth.status_code = cpu_to_le16(status); 1438 if (extra) 1439 skb_put_data(skb, extra, extra_len); 1440 1441 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1442 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1443 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1444 WARN_ON(err); 1445 } 1446 1447 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1448 tx_flags; 1449 ieee80211_tx_skb(sdata, skb); 1450 } 1451 1452 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1453 const u8 *bssid, u16 stype, u16 reason, 1454 bool send_frame, u8 *frame_buf) 1455 { 1456 struct ieee80211_local *local = sdata->local; 1457 struct sk_buff *skb; 1458 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1459 1460 /* build frame */ 1461 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1462 mgmt->duration = 0; /* initialize only */ 1463 mgmt->seq_ctrl = 0; /* initialize only */ 1464 memcpy(mgmt->da, bssid, ETH_ALEN); 1465 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1466 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1467 /* u.deauth.reason_code == u.disassoc.reason_code */ 1468 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1469 1470 if (send_frame) { 1471 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1472 IEEE80211_DEAUTH_FRAME_LEN); 1473 if (!skb) 1474 return; 1475 1476 skb_reserve(skb, local->hw.extra_tx_headroom); 1477 1478 /* copy in frame */ 1479 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1480 1481 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1482 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1483 IEEE80211_SKB_CB(skb)->flags |= 1484 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1485 1486 ieee80211_tx_skb(sdata, skb); 1487 } 1488 } 1489 1490 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1491 u8 *buffer, size_t buffer_len, 1492 const u8 *ie, size_t ie_len, 1493 enum nl80211_band band, 1494 u32 rate_mask, 1495 struct cfg80211_chan_def *chandef, 1496 size_t *offset, u32 flags) 1497 { 1498 struct ieee80211_supported_band *sband; 1499 const struct ieee80211_sta_he_cap *he_cap; 1500 u8 *pos = buffer, *end = buffer + buffer_len; 1501 size_t noffset; 1502 int supp_rates_len, i; 1503 u8 rates[32]; 1504 int num_rates; 1505 int ext_rates_len; 1506 int shift; 1507 u32 rate_flags; 1508 bool have_80mhz = false; 1509 1510 *offset = 0; 1511 1512 sband = local->hw.wiphy->bands[band]; 1513 if (WARN_ON_ONCE(!sband)) 1514 return 0; 1515 1516 rate_flags = ieee80211_chandef_rate_flags(chandef); 1517 shift = ieee80211_chandef_get_shift(chandef); 1518 1519 num_rates = 0; 1520 for (i = 0; i < sband->n_bitrates; i++) { 1521 if ((BIT(i) & rate_mask) == 0) 1522 continue; /* skip rate */ 1523 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1524 continue; 1525 1526 rates[num_rates++] = 1527 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1528 (1 << shift) * 5); 1529 } 1530 1531 supp_rates_len = min_t(int, num_rates, 8); 1532 1533 if (end - pos < 2 + supp_rates_len) 1534 goto out_err; 1535 *pos++ = WLAN_EID_SUPP_RATES; 1536 *pos++ = supp_rates_len; 1537 memcpy(pos, rates, supp_rates_len); 1538 pos += supp_rates_len; 1539 1540 /* insert "request information" if in custom IEs */ 1541 if (ie && ie_len) { 1542 static const u8 before_extrates[] = { 1543 WLAN_EID_SSID, 1544 WLAN_EID_SUPP_RATES, 1545 WLAN_EID_REQUEST, 1546 }; 1547 noffset = ieee80211_ie_split(ie, ie_len, 1548 before_extrates, 1549 ARRAY_SIZE(before_extrates), 1550 *offset); 1551 if (end - pos < noffset - *offset) 1552 goto out_err; 1553 memcpy(pos, ie + *offset, noffset - *offset); 1554 pos += noffset - *offset; 1555 *offset = noffset; 1556 } 1557 1558 ext_rates_len = num_rates - supp_rates_len; 1559 if (ext_rates_len > 0) { 1560 if (end - pos < 2 + ext_rates_len) 1561 goto out_err; 1562 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1563 *pos++ = ext_rates_len; 1564 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1565 pos += ext_rates_len; 1566 } 1567 1568 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1569 if (end - pos < 3) 1570 goto out_err; 1571 *pos++ = WLAN_EID_DS_PARAMS; 1572 *pos++ = 1; 1573 *pos++ = ieee80211_frequency_to_channel( 1574 chandef->chan->center_freq); 1575 } 1576 1577 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1578 goto done; 1579 1580 /* insert custom IEs that go before HT */ 1581 if (ie && ie_len) { 1582 static const u8 before_ht[] = { 1583 /* 1584 * no need to list the ones split off already 1585 * (or generated here) 1586 */ 1587 WLAN_EID_DS_PARAMS, 1588 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1589 }; 1590 noffset = ieee80211_ie_split(ie, ie_len, 1591 before_ht, ARRAY_SIZE(before_ht), 1592 *offset); 1593 if (end - pos < noffset - *offset) 1594 goto out_err; 1595 memcpy(pos, ie + *offset, noffset - *offset); 1596 pos += noffset - *offset; 1597 *offset = noffset; 1598 } 1599 1600 if (sband->ht_cap.ht_supported) { 1601 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1602 goto out_err; 1603 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1604 sband->ht_cap.cap); 1605 } 1606 1607 /* insert custom IEs that go before VHT */ 1608 if (ie && ie_len) { 1609 static const u8 before_vht[] = { 1610 /* 1611 * no need to list the ones split off already 1612 * (or generated here) 1613 */ 1614 WLAN_EID_BSS_COEX_2040, 1615 WLAN_EID_EXT_CAPABILITY, 1616 WLAN_EID_SSID_LIST, 1617 WLAN_EID_CHANNEL_USAGE, 1618 WLAN_EID_INTERWORKING, 1619 WLAN_EID_MESH_ID, 1620 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1621 }; 1622 noffset = ieee80211_ie_split(ie, ie_len, 1623 before_vht, ARRAY_SIZE(before_vht), 1624 *offset); 1625 if (end - pos < noffset - *offset) 1626 goto out_err; 1627 memcpy(pos, ie + *offset, noffset - *offset); 1628 pos += noffset - *offset; 1629 *offset = noffset; 1630 } 1631 1632 /* Check if any channel in this sband supports at least 80 MHz */ 1633 for (i = 0; i < sband->n_channels; i++) { 1634 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1635 IEEE80211_CHAN_NO_80MHZ)) 1636 continue; 1637 1638 have_80mhz = true; 1639 break; 1640 } 1641 1642 if (sband->vht_cap.vht_supported && have_80mhz) { 1643 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1644 goto out_err; 1645 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1646 sband->vht_cap.cap); 1647 } 1648 1649 /* insert custom IEs that go before HE */ 1650 if (ie && ie_len) { 1651 static const u8 before_he[] = { 1652 /* 1653 * no need to list the ones split off before VHT 1654 * or generated here 1655 */ 1656 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1657 WLAN_EID_AP_CSN, 1658 /* TODO: add 11ah/11aj/11ak elements */ 1659 }; 1660 noffset = ieee80211_ie_split(ie, ie_len, 1661 before_he, ARRAY_SIZE(before_he), 1662 *offset); 1663 if (end - pos < noffset - *offset) 1664 goto out_err; 1665 memcpy(pos, ie + *offset, noffset - *offset); 1666 pos += noffset - *offset; 1667 *offset = noffset; 1668 } 1669 1670 he_cap = ieee80211_get_he_sta_cap(sband); 1671 if (he_cap) { 1672 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1673 if (!pos) 1674 goto out_err; 1675 } 1676 1677 /* 1678 * If adding more here, adjust code in main.c 1679 * that calculates local->scan_ies_len. 1680 */ 1681 1682 return pos - buffer; 1683 out_err: 1684 WARN_ONCE(1, "not enough space for preq IEs\n"); 1685 done: 1686 return pos - buffer; 1687 } 1688 1689 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1690 size_t buffer_len, 1691 struct ieee80211_scan_ies *ie_desc, 1692 const u8 *ie, size_t ie_len, 1693 u8 bands_used, u32 *rate_masks, 1694 struct cfg80211_chan_def *chandef, 1695 u32 flags) 1696 { 1697 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1698 int i; 1699 1700 memset(ie_desc, 0, sizeof(*ie_desc)); 1701 1702 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1703 if (bands_used & BIT(i)) { 1704 pos += ieee80211_build_preq_ies_band(local, 1705 buffer + pos, 1706 buffer_len - pos, 1707 ie, ie_len, i, 1708 rate_masks[i], 1709 chandef, 1710 &custom_ie_offset, 1711 flags); 1712 ie_desc->ies[i] = buffer + old_pos; 1713 ie_desc->len[i] = pos - old_pos; 1714 old_pos = pos; 1715 } 1716 } 1717 1718 /* add any remaining custom IEs */ 1719 if (ie && ie_len) { 1720 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1721 "not enough space for preq custom IEs\n")) 1722 return pos; 1723 memcpy(buffer + pos, ie + custom_ie_offset, 1724 ie_len - custom_ie_offset); 1725 ie_desc->common_ies = buffer + pos; 1726 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1727 pos += ie_len - custom_ie_offset; 1728 } 1729 1730 return pos; 1731 }; 1732 1733 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1734 const u8 *src, const u8 *dst, 1735 u32 ratemask, 1736 struct ieee80211_channel *chan, 1737 const u8 *ssid, size_t ssid_len, 1738 const u8 *ie, size_t ie_len, 1739 u32 flags) 1740 { 1741 struct ieee80211_local *local = sdata->local; 1742 struct cfg80211_chan_def chandef; 1743 struct sk_buff *skb; 1744 struct ieee80211_mgmt *mgmt; 1745 int ies_len; 1746 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1747 struct ieee80211_scan_ies dummy_ie_desc; 1748 1749 /* 1750 * Do not send DS Channel parameter for directed probe requests 1751 * in order to maximize the chance that we get a response. Some 1752 * badly-behaved APs don't respond when this parameter is included. 1753 */ 1754 chandef.width = sdata->vif.bss_conf.chandef.width; 1755 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1756 chandef.chan = NULL; 1757 else 1758 chandef.chan = chan; 1759 1760 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1761 100 + ie_len); 1762 if (!skb) 1763 return NULL; 1764 1765 rate_masks[chan->band] = ratemask; 1766 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1767 skb_tailroom(skb), &dummy_ie_desc, 1768 ie, ie_len, BIT(chan->band), 1769 rate_masks, &chandef, flags); 1770 skb_put(skb, ies_len); 1771 1772 if (dst) { 1773 mgmt = (struct ieee80211_mgmt *) skb->data; 1774 memcpy(mgmt->da, dst, ETH_ALEN); 1775 memcpy(mgmt->bssid, dst, ETH_ALEN); 1776 } 1777 1778 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1779 1780 return skb; 1781 } 1782 1783 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1784 struct ieee802_11_elems *elems, 1785 enum nl80211_band band, u32 *basic_rates) 1786 { 1787 struct ieee80211_supported_band *sband; 1788 size_t num_rates; 1789 u32 supp_rates, rate_flags; 1790 int i, j, shift; 1791 1792 sband = sdata->local->hw.wiphy->bands[band]; 1793 if (WARN_ON(!sband)) 1794 return 1; 1795 1796 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1797 shift = ieee80211_vif_get_shift(&sdata->vif); 1798 1799 num_rates = sband->n_bitrates; 1800 supp_rates = 0; 1801 for (i = 0; i < elems->supp_rates_len + 1802 elems->ext_supp_rates_len; i++) { 1803 u8 rate = 0; 1804 int own_rate; 1805 bool is_basic; 1806 if (i < elems->supp_rates_len) 1807 rate = elems->supp_rates[i]; 1808 else if (elems->ext_supp_rates) 1809 rate = elems->ext_supp_rates 1810 [i - elems->supp_rates_len]; 1811 own_rate = 5 * (rate & 0x7f); 1812 is_basic = !!(rate & 0x80); 1813 1814 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1815 continue; 1816 1817 for (j = 0; j < num_rates; j++) { 1818 int brate; 1819 if ((rate_flags & sband->bitrates[j].flags) 1820 != rate_flags) 1821 continue; 1822 1823 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1824 1 << shift); 1825 1826 if (brate == own_rate) { 1827 supp_rates |= BIT(j); 1828 if (basic_rates && is_basic) 1829 *basic_rates |= BIT(j); 1830 } 1831 } 1832 } 1833 return supp_rates; 1834 } 1835 1836 void ieee80211_stop_device(struct ieee80211_local *local) 1837 { 1838 ieee80211_led_radio(local, false); 1839 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1840 1841 cancel_work_sync(&local->reconfig_filter); 1842 1843 flush_workqueue(local->workqueue); 1844 drv_stop(local); 1845 } 1846 1847 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1848 bool aborted) 1849 { 1850 /* It's possible that we don't handle the scan completion in 1851 * time during suspend, so if it's still marked as completed 1852 * here, queue the work and flush it to clean things up. 1853 * Instead of calling the worker function directly here, we 1854 * really queue it to avoid potential races with other flows 1855 * scheduling the same work. 1856 */ 1857 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1858 /* If coming from reconfiguration failure, abort the scan so 1859 * we don't attempt to continue a partial HW scan - which is 1860 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1861 * completed scan, and a 5 GHz portion is still pending. 1862 */ 1863 if (aborted) 1864 set_bit(SCAN_ABORTED, &local->scanning); 1865 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1866 flush_delayed_work(&local->scan_work); 1867 } 1868 } 1869 1870 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1871 { 1872 struct ieee80211_sub_if_data *sdata; 1873 struct ieee80211_chanctx *ctx; 1874 1875 /* 1876 * We get here if during resume the device can't be restarted properly. 1877 * We might also get here if this happens during HW reset, which is a 1878 * slightly different situation and we need to drop all connections in 1879 * the latter case. 1880 * 1881 * Ask cfg80211 to turn off all interfaces, this will result in more 1882 * warnings but at least we'll then get into a clean stopped state. 1883 */ 1884 1885 local->resuming = false; 1886 local->suspended = false; 1887 local->in_reconfig = false; 1888 1889 ieee80211_flush_completed_scan(local, true); 1890 1891 /* scheduled scan clearly can't be running any more, but tell 1892 * cfg80211 and clear local state 1893 */ 1894 ieee80211_sched_scan_end(local); 1895 1896 list_for_each_entry(sdata, &local->interfaces, list) 1897 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1898 1899 /* Mark channel contexts as not being in the driver any more to avoid 1900 * removing them from the driver during the shutdown process... 1901 */ 1902 mutex_lock(&local->chanctx_mtx); 1903 list_for_each_entry(ctx, &local->chanctx_list, list) 1904 ctx->driver_present = false; 1905 mutex_unlock(&local->chanctx_mtx); 1906 1907 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1908 } 1909 1910 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1911 struct ieee80211_sub_if_data *sdata) 1912 { 1913 struct ieee80211_chanctx_conf *conf; 1914 struct ieee80211_chanctx *ctx; 1915 1916 if (!local->use_chanctx) 1917 return; 1918 1919 mutex_lock(&local->chanctx_mtx); 1920 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1921 lockdep_is_held(&local->chanctx_mtx)); 1922 if (conf) { 1923 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1924 drv_assign_vif_chanctx(local, sdata, ctx); 1925 } 1926 mutex_unlock(&local->chanctx_mtx); 1927 } 1928 1929 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1930 { 1931 struct ieee80211_local *local = sdata->local; 1932 struct sta_info *sta; 1933 1934 /* add STAs back */ 1935 mutex_lock(&local->sta_mtx); 1936 list_for_each_entry(sta, &local->sta_list, list) { 1937 enum ieee80211_sta_state state; 1938 1939 if (!sta->uploaded || sta->sdata != sdata) 1940 continue; 1941 1942 for (state = IEEE80211_STA_NOTEXIST; 1943 state < sta->sta_state; state++) 1944 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1945 state + 1)); 1946 } 1947 mutex_unlock(&local->sta_mtx); 1948 } 1949 1950 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1951 { 1952 struct cfg80211_nan_func *func, **funcs; 1953 int res, id, i = 0; 1954 1955 res = drv_start_nan(sdata->local, sdata, 1956 &sdata->u.nan.conf); 1957 if (WARN_ON(res)) 1958 return res; 1959 1960 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 1961 sizeof(*funcs), 1962 GFP_KERNEL); 1963 if (!funcs) 1964 return -ENOMEM; 1965 1966 /* Add all the functions: 1967 * This is a little bit ugly. We need to call a potentially sleeping 1968 * callback for each NAN function, so we can't hold the spinlock. 1969 */ 1970 spin_lock_bh(&sdata->u.nan.func_lock); 1971 1972 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 1973 funcs[i++] = func; 1974 1975 spin_unlock_bh(&sdata->u.nan.func_lock); 1976 1977 for (i = 0; funcs[i]; i++) { 1978 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1979 if (WARN_ON(res)) 1980 ieee80211_nan_func_terminated(&sdata->vif, 1981 funcs[i]->instance_id, 1982 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1983 GFP_KERNEL); 1984 } 1985 1986 kfree(funcs); 1987 1988 return 0; 1989 } 1990 1991 int ieee80211_reconfig(struct ieee80211_local *local) 1992 { 1993 struct ieee80211_hw *hw = &local->hw; 1994 struct ieee80211_sub_if_data *sdata; 1995 struct ieee80211_chanctx *ctx; 1996 struct sta_info *sta; 1997 int res, i; 1998 bool reconfig_due_to_wowlan = false; 1999 struct ieee80211_sub_if_data *sched_scan_sdata; 2000 struct cfg80211_sched_scan_request *sched_scan_req; 2001 bool sched_scan_stopped = false; 2002 bool suspended = local->suspended; 2003 2004 /* nothing to do if HW shouldn't run */ 2005 if (!local->open_count) 2006 goto wake_up; 2007 2008 #ifdef CONFIG_PM 2009 if (suspended) 2010 local->resuming = true; 2011 2012 if (local->wowlan) { 2013 /* 2014 * In the wowlan case, both mac80211 and the device 2015 * are functional when the resume op is called, so 2016 * clear local->suspended so the device could operate 2017 * normally (e.g. pass rx frames). 2018 */ 2019 local->suspended = false; 2020 res = drv_resume(local); 2021 local->wowlan = false; 2022 if (res < 0) { 2023 local->resuming = false; 2024 return res; 2025 } 2026 if (res == 0) 2027 goto wake_up; 2028 WARN_ON(res > 1); 2029 /* 2030 * res is 1, which means the driver requested 2031 * to go through a regular reset on wakeup. 2032 * restore local->suspended in this case. 2033 */ 2034 reconfig_due_to_wowlan = true; 2035 local->suspended = true; 2036 } 2037 #endif 2038 2039 /* 2040 * In case of hw_restart during suspend (without wowlan), 2041 * cancel restart work, as we are reconfiguring the device 2042 * anyway. 2043 * Note that restart_work is scheduled on a frozen workqueue, 2044 * so we can't deadlock in this case. 2045 */ 2046 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2047 cancel_work_sync(&local->restart_work); 2048 2049 local->started = false; 2050 2051 /* 2052 * Upon resume hardware can sometimes be goofy due to 2053 * various platform / driver / bus issues, so restarting 2054 * the device may at times not work immediately. Propagate 2055 * the error. 2056 */ 2057 res = drv_start(local); 2058 if (res) { 2059 if (suspended) 2060 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2061 else 2062 WARN(1, "Hardware became unavailable during restart.\n"); 2063 ieee80211_handle_reconfig_failure(local); 2064 return res; 2065 } 2066 2067 /* setup fragmentation threshold */ 2068 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2069 2070 /* setup RTS threshold */ 2071 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2072 2073 /* reset coverage class */ 2074 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2075 2076 ieee80211_led_radio(local, true); 2077 ieee80211_mod_tpt_led_trig(local, 2078 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2079 2080 /* add interfaces */ 2081 sdata = rtnl_dereference(local->monitor_sdata); 2082 if (sdata) { 2083 /* in HW restart it exists already */ 2084 WARN_ON(local->resuming); 2085 res = drv_add_interface(local, sdata); 2086 if (WARN_ON(res)) { 2087 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2088 synchronize_net(); 2089 kfree(sdata); 2090 } 2091 } 2092 2093 list_for_each_entry(sdata, &local->interfaces, list) { 2094 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2095 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2096 ieee80211_sdata_running(sdata)) { 2097 res = drv_add_interface(local, sdata); 2098 if (WARN_ON(res)) 2099 break; 2100 } 2101 } 2102 2103 /* If adding any of the interfaces failed above, roll back and 2104 * report failure. 2105 */ 2106 if (res) { 2107 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2108 list) 2109 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2110 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2111 ieee80211_sdata_running(sdata)) 2112 drv_remove_interface(local, sdata); 2113 ieee80211_handle_reconfig_failure(local); 2114 return res; 2115 } 2116 2117 /* add channel contexts */ 2118 if (local->use_chanctx) { 2119 mutex_lock(&local->chanctx_mtx); 2120 list_for_each_entry(ctx, &local->chanctx_list, list) 2121 if (ctx->replace_state != 2122 IEEE80211_CHANCTX_REPLACES_OTHER) 2123 WARN_ON(drv_add_chanctx(local, ctx)); 2124 mutex_unlock(&local->chanctx_mtx); 2125 2126 sdata = rtnl_dereference(local->monitor_sdata); 2127 if (sdata && ieee80211_sdata_running(sdata)) 2128 ieee80211_assign_chanctx(local, sdata); 2129 } 2130 2131 /* reconfigure hardware */ 2132 ieee80211_hw_config(local, ~0); 2133 2134 ieee80211_configure_filter(local); 2135 2136 /* Finally also reconfigure all the BSS information */ 2137 list_for_each_entry(sdata, &local->interfaces, list) { 2138 u32 changed; 2139 2140 if (!ieee80211_sdata_running(sdata)) 2141 continue; 2142 2143 ieee80211_assign_chanctx(local, sdata); 2144 2145 switch (sdata->vif.type) { 2146 case NL80211_IFTYPE_AP_VLAN: 2147 case NL80211_IFTYPE_MONITOR: 2148 break; 2149 default: 2150 ieee80211_reconfig_stations(sdata); 2151 /* fall through */ 2152 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2153 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2154 drv_conf_tx(local, sdata, i, 2155 &sdata->tx_conf[i]); 2156 break; 2157 } 2158 2159 /* common change flags for all interface types */ 2160 changed = BSS_CHANGED_ERP_CTS_PROT | 2161 BSS_CHANGED_ERP_PREAMBLE | 2162 BSS_CHANGED_ERP_SLOT | 2163 BSS_CHANGED_HT | 2164 BSS_CHANGED_BASIC_RATES | 2165 BSS_CHANGED_BEACON_INT | 2166 BSS_CHANGED_BSSID | 2167 BSS_CHANGED_CQM | 2168 BSS_CHANGED_QOS | 2169 BSS_CHANGED_IDLE | 2170 BSS_CHANGED_TXPOWER | 2171 BSS_CHANGED_MCAST_RATE; 2172 2173 if (sdata->vif.mu_mimo_owner) 2174 changed |= BSS_CHANGED_MU_GROUPS; 2175 2176 switch (sdata->vif.type) { 2177 case NL80211_IFTYPE_STATION: 2178 changed |= BSS_CHANGED_ASSOC | 2179 BSS_CHANGED_ARP_FILTER | 2180 BSS_CHANGED_PS; 2181 2182 /* Re-send beacon info report to the driver */ 2183 if (sdata->u.mgd.have_beacon) 2184 changed |= BSS_CHANGED_BEACON_INFO; 2185 2186 if (sdata->vif.bss_conf.max_idle_period || 2187 sdata->vif.bss_conf.protected_keep_alive) 2188 changed |= BSS_CHANGED_KEEP_ALIVE; 2189 2190 sdata_lock(sdata); 2191 ieee80211_bss_info_change_notify(sdata, changed); 2192 sdata_unlock(sdata); 2193 break; 2194 case NL80211_IFTYPE_OCB: 2195 changed |= BSS_CHANGED_OCB; 2196 ieee80211_bss_info_change_notify(sdata, changed); 2197 break; 2198 case NL80211_IFTYPE_ADHOC: 2199 changed |= BSS_CHANGED_IBSS; 2200 /* fall through */ 2201 case NL80211_IFTYPE_AP: 2202 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2203 2204 if (sdata->vif.bss_conf.ftm_responder == 1 && 2205 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2206 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2207 changed |= BSS_CHANGED_FTM_RESPONDER; 2208 2209 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2210 changed |= BSS_CHANGED_AP_PROBE_RESP; 2211 2212 if (rcu_access_pointer(sdata->u.ap.beacon)) 2213 drv_start_ap(local, sdata); 2214 } 2215 2216 /* fall through */ 2217 case NL80211_IFTYPE_MESH_POINT: 2218 if (sdata->vif.bss_conf.enable_beacon) { 2219 changed |= BSS_CHANGED_BEACON | 2220 BSS_CHANGED_BEACON_ENABLED; 2221 ieee80211_bss_info_change_notify(sdata, changed); 2222 } 2223 break; 2224 case NL80211_IFTYPE_NAN: 2225 res = ieee80211_reconfig_nan(sdata); 2226 if (res < 0) { 2227 ieee80211_handle_reconfig_failure(local); 2228 return res; 2229 } 2230 break; 2231 case NL80211_IFTYPE_WDS: 2232 case NL80211_IFTYPE_AP_VLAN: 2233 case NL80211_IFTYPE_MONITOR: 2234 case NL80211_IFTYPE_P2P_DEVICE: 2235 /* nothing to do */ 2236 break; 2237 case NL80211_IFTYPE_UNSPECIFIED: 2238 case NUM_NL80211_IFTYPES: 2239 case NL80211_IFTYPE_P2P_CLIENT: 2240 case NL80211_IFTYPE_P2P_GO: 2241 WARN_ON(1); 2242 break; 2243 } 2244 } 2245 2246 ieee80211_recalc_ps(local); 2247 2248 /* 2249 * The sta might be in psm against the ap (e.g. because 2250 * this was the state before a hw restart), so we 2251 * explicitly send a null packet in order to make sure 2252 * it'll sync against the ap (and get out of psm). 2253 */ 2254 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2255 list_for_each_entry(sdata, &local->interfaces, list) { 2256 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2257 continue; 2258 if (!sdata->u.mgd.associated) 2259 continue; 2260 2261 ieee80211_send_nullfunc(local, sdata, false); 2262 } 2263 } 2264 2265 /* APs are now beaconing, add back stations */ 2266 mutex_lock(&local->sta_mtx); 2267 list_for_each_entry(sta, &local->sta_list, list) { 2268 enum ieee80211_sta_state state; 2269 2270 if (!sta->uploaded) 2271 continue; 2272 2273 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2274 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2275 continue; 2276 2277 for (state = IEEE80211_STA_NOTEXIST; 2278 state < sta->sta_state; state++) 2279 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2280 state + 1)); 2281 } 2282 mutex_unlock(&local->sta_mtx); 2283 2284 /* add back keys */ 2285 list_for_each_entry(sdata, &local->interfaces, list) 2286 ieee80211_reset_crypto_tx_tailroom(sdata); 2287 2288 list_for_each_entry(sdata, &local->interfaces, list) 2289 if (ieee80211_sdata_running(sdata)) 2290 ieee80211_enable_keys(sdata); 2291 2292 /* Reconfigure sched scan if it was interrupted by FW restart */ 2293 mutex_lock(&local->mtx); 2294 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2295 lockdep_is_held(&local->mtx)); 2296 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2297 lockdep_is_held(&local->mtx)); 2298 if (sched_scan_sdata && sched_scan_req) 2299 /* 2300 * Sched scan stopped, but we don't want to report it. Instead, 2301 * we're trying to reschedule. However, if more than one scan 2302 * plan was set, we cannot reschedule since we don't know which 2303 * scan plan was currently running (and some scan plans may have 2304 * already finished). 2305 */ 2306 if (sched_scan_req->n_scan_plans > 1 || 2307 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2308 sched_scan_req)) { 2309 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2310 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2311 sched_scan_stopped = true; 2312 } 2313 mutex_unlock(&local->mtx); 2314 2315 if (sched_scan_stopped) 2316 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2317 2318 wake_up: 2319 2320 if (local->monitors == local->open_count && local->monitors > 0) 2321 ieee80211_add_virtual_monitor(local); 2322 2323 /* 2324 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2325 * sessions can be established after a resume. 2326 * 2327 * Also tear down aggregation sessions since reconfiguring 2328 * them in a hardware restart scenario is not easily done 2329 * right now, and the hardware will have lost information 2330 * about the sessions, but we and the AP still think they 2331 * are active. This is really a workaround though. 2332 */ 2333 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2334 mutex_lock(&local->sta_mtx); 2335 2336 list_for_each_entry(sta, &local->sta_list, list) { 2337 if (!local->resuming) 2338 ieee80211_sta_tear_down_BA_sessions( 2339 sta, AGG_STOP_LOCAL_REQUEST); 2340 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2341 } 2342 2343 mutex_unlock(&local->sta_mtx); 2344 } 2345 2346 if (local->in_reconfig) { 2347 local->in_reconfig = false; 2348 barrier(); 2349 2350 /* Restart deferred ROCs */ 2351 mutex_lock(&local->mtx); 2352 ieee80211_start_next_roc(local); 2353 mutex_unlock(&local->mtx); 2354 } 2355 2356 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2357 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2358 false); 2359 2360 /* 2361 * If this is for hw restart things are still running. 2362 * We may want to change that later, however. 2363 */ 2364 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2365 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2366 2367 if (!suspended) 2368 return 0; 2369 2370 #ifdef CONFIG_PM 2371 /* first set suspended false, then resuming */ 2372 local->suspended = false; 2373 mb(); 2374 local->resuming = false; 2375 2376 ieee80211_flush_completed_scan(local, false); 2377 2378 if (local->open_count && !reconfig_due_to_wowlan) 2379 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2380 2381 list_for_each_entry(sdata, &local->interfaces, list) { 2382 if (!ieee80211_sdata_running(sdata)) 2383 continue; 2384 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2385 ieee80211_sta_restart(sdata); 2386 } 2387 2388 mod_timer(&local->sta_cleanup, jiffies + 1); 2389 #else 2390 WARN_ON(1); 2391 #endif 2392 2393 return 0; 2394 } 2395 2396 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2397 { 2398 struct ieee80211_sub_if_data *sdata; 2399 struct ieee80211_local *local; 2400 struct ieee80211_key *key; 2401 2402 if (WARN_ON(!vif)) 2403 return; 2404 2405 sdata = vif_to_sdata(vif); 2406 local = sdata->local; 2407 2408 if (WARN_ON(!local->resuming)) 2409 return; 2410 2411 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2412 return; 2413 2414 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2415 2416 mutex_lock(&local->key_mtx); 2417 list_for_each_entry(key, &sdata->key_list, list) 2418 key->flags |= KEY_FLAG_TAINTED; 2419 mutex_unlock(&local->key_mtx); 2420 } 2421 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2422 2423 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2424 { 2425 struct ieee80211_local *local = sdata->local; 2426 struct ieee80211_chanctx_conf *chanctx_conf; 2427 struct ieee80211_chanctx *chanctx; 2428 2429 mutex_lock(&local->chanctx_mtx); 2430 2431 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2432 lockdep_is_held(&local->chanctx_mtx)); 2433 2434 /* 2435 * This function can be called from a work, thus it may be possible 2436 * that the chanctx_conf is removed (due to a disconnection, for 2437 * example). 2438 * So nothing should be done in such case. 2439 */ 2440 if (!chanctx_conf) 2441 goto unlock; 2442 2443 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2444 ieee80211_recalc_smps_chanctx(local, chanctx); 2445 unlock: 2446 mutex_unlock(&local->chanctx_mtx); 2447 } 2448 2449 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2450 { 2451 struct ieee80211_local *local = sdata->local; 2452 struct ieee80211_chanctx_conf *chanctx_conf; 2453 struct ieee80211_chanctx *chanctx; 2454 2455 mutex_lock(&local->chanctx_mtx); 2456 2457 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2458 lockdep_is_held(&local->chanctx_mtx)); 2459 2460 if (WARN_ON_ONCE(!chanctx_conf)) 2461 goto unlock; 2462 2463 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2464 ieee80211_recalc_chanctx_min_def(local, chanctx); 2465 unlock: 2466 mutex_unlock(&local->chanctx_mtx); 2467 } 2468 2469 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2470 { 2471 size_t pos = offset; 2472 2473 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2474 pos += 2 + ies[pos + 1]; 2475 2476 return pos; 2477 } 2478 2479 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2480 int rssi_min_thold, 2481 int rssi_max_thold) 2482 { 2483 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2484 2485 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2486 return; 2487 2488 /* 2489 * Scale up threshold values before storing it, as the RSSI averaging 2490 * algorithm uses a scaled up value as well. Change this scaling 2491 * factor if the RSSI averaging algorithm changes. 2492 */ 2493 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2494 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2495 } 2496 2497 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2498 int rssi_min_thold, 2499 int rssi_max_thold) 2500 { 2501 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2502 2503 WARN_ON(rssi_min_thold == rssi_max_thold || 2504 rssi_min_thold > rssi_max_thold); 2505 2506 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2507 rssi_max_thold); 2508 } 2509 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2510 2511 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2512 { 2513 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2514 2515 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2516 } 2517 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2518 2519 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2520 u16 cap) 2521 { 2522 __le16 tmp; 2523 2524 *pos++ = WLAN_EID_HT_CAPABILITY; 2525 *pos++ = sizeof(struct ieee80211_ht_cap); 2526 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2527 2528 /* capability flags */ 2529 tmp = cpu_to_le16(cap); 2530 memcpy(pos, &tmp, sizeof(u16)); 2531 pos += sizeof(u16); 2532 2533 /* AMPDU parameters */ 2534 *pos++ = ht_cap->ampdu_factor | 2535 (ht_cap->ampdu_density << 2536 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2537 2538 /* MCS set */ 2539 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2540 pos += sizeof(ht_cap->mcs); 2541 2542 /* extended capabilities */ 2543 pos += sizeof(__le16); 2544 2545 /* BF capabilities */ 2546 pos += sizeof(__le32); 2547 2548 /* antenna selection */ 2549 pos += sizeof(u8); 2550 2551 return pos; 2552 } 2553 2554 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2555 u32 cap) 2556 { 2557 __le32 tmp; 2558 2559 *pos++ = WLAN_EID_VHT_CAPABILITY; 2560 *pos++ = sizeof(struct ieee80211_vht_cap); 2561 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2562 2563 /* capability flags */ 2564 tmp = cpu_to_le32(cap); 2565 memcpy(pos, &tmp, sizeof(u32)); 2566 pos += sizeof(u32); 2567 2568 /* VHT MCS set */ 2569 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2570 pos += sizeof(vht_cap->vht_mcs); 2571 2572 return pos; 2573 } 2574 2575 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2576 const struct ieee80211_sta_he_cap *he_cap, 2577 u8 *end) 2578 { 2579 u8 n; 2580 u8 ie_len; 2581 u8 *orig_pos = pos; 2582 2583 /* Make sure we have place for the IE */ 2584 /* 2585 * TODO: the 1 added is because this temporarily is under the EXTENSION 2586 * IE. Get rid of it when it moves. 2587 */ 2588 if (!he_cap) 2589 return orig_pos; 2590 2591 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2592 ie_len = 2 + 1 + 2593 sizeof(he_cap->he_cap_elem) + n + 2594 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2595 he_cap->he_cap_elem.phy_cap_info); 2596 2597 if ((end - pos) < ie_len) 2598 return orig_pos; 2599 2600 *pos++ = WLAN_EID_EXTENSION; 2601 pos++; /* We'll set the size later below */ 2602 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2603 2604 /* Fixed data */ 2605 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2606 pos += sizeof(he_cap->he_cap_elem); 2607 2608 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2609 pos += n; 2610 2611 /* Check if PPE Threshold should be present */ 2612 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2613 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2614 goto end; 2615 2616 /* 2617 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2618 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2619 */ 2620 n = hweight8(he_cap->ppe_thres[0] & 2621 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2622 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2623 IEEE80211_PPE_THRES_NSS_POS)); 2624 2625 /* 2626 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2627 * total size. 2628 */ 2629 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2630 n = DIV_ROUND_UP(n, 8); 2631 2632 /* Copy PPE Thresholds */ 2633 memcpy(pos, &he_cap->ppe_thres, n); 2634 pos += n; 2635 2636 end: 2637 orig_pos[1] = (pos - orig_pos) - 2; 2638 return pos; 2639 } 2640 2641 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2642 const struct cfg80211_chan_def *chandef, 2643 u16 prot_mode, bool rifs_mode) 2644 { 2645 struct ieee80211_ht_operation *ht_oper; 2646 /* Build HT Information */ 2647 *pos++ = WLAN_EID_HT_OPERATION; 2648 *pos++ = sizeof(struct ieee80211_ht_operation); 2649 ht_oper = (struct ieee80211_ht_operation *)pos; 2650 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2651 chandef->chan->center_freq); 2652 switch (chandef->width) { 2653 case NL80211_CHAN_WIDTH_160: 2654 case NL80211_CHAN_WIDTH_80P80: 2655 case NL80211_CHAN_WIDTH_80: 2656 case NL80211_CHAN_WIDTH_40: 2657 if (chandef->center_freq1 > chandef->chan->center_freq) 2658 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2659 else 2660 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2661 break; 2662 default: 2663 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2664 break; 2665 } 2666 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2667 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2668 chandef->width != NL80211_CHAN_WIDTH_20) 2669 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2670 2671 if (rifs_mode) 2672 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2673 2674 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2675 ht_oper->stbc_param = 0x0000; 2676 2677 /* It seems that Basic MCS set and Supported MCS set 2678 are identical for the first 10 bytes */ 2679 memset(&ht_oper->basic_set, 0, 16); 2680 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2681 2682 return pos + sizeof(struct ieee80211_ht_operation); 2683 } 2684 2685 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2686 const struct cfg80211_chan_def *chandef) 2687 { 2688 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2689 *pos++ = 3; /* IE length */ 2690 /* New channel width */ 2691 switch (chandef->width) { 2692 case NL80211_CHAN_WIDTH_80: 2693 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2694 break; 2695 case NL80211_CHAN_WIDTH_160: 2696 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2697 break; 2698 case NL80211_CHAN_WIDTH_80P80: 2699 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2700 break; 2701 default: 2702 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2703 } 2704 2705 /* new center frequency segment 0 */ 2706 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2707 /* new center frequency segment 1 */ 2708 if (chandef->center_freq2) 2709 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2710 else 2711 *pos++ = 0; 2712 } 2713 2714 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2715 const struct cfg80211_chan_def *chandef) 2716 { 2717 struct ieee80211_vht_operation *vht_oper; 2718 2719 *pos++ = WLAN_EID_VHT_OPERATION; 2720 *pos++ = sizeof(struct ieee80211_vht_operation); 2721 vht_oper = (struct ieee80211_vht_operation *)pos; 2722 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2723 chandef->center_freq1); 2724 if (chandef->center_freq2) 2725 vht_oper->center_freq_seg1_idx = 2726 ieee80211_frequency_to_channel(chandef->center_freq2); 2727 else 2728 vht_oper->center_freq_seg1_idx = 0x00; 2729 2730 switch (chandef->width) { 2731 case NL80211_CHAN_WIDTH_160: 2732 /* 2733 * Convert 160 MHz channel width to new style as interop 2734 * workaround. 2735 */ 2736 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2737 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2738 if (chandef->chan->center_freq < chandef->center_freq1) 2739 vht_oper->center_freq_seg0_idx -= 8; 2740 else 2741 vht_oper->center_freq_seg0_idx += 8; 2742 break; 2743 case NL80211_CHAN_WIDTH_80P80: 2744 /* 2745 * Convert 80+80 MHz channel width to new style as interop 2746 * workaround. 2747 */ 2748 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2749 break; 2750 case NL80211_CHAN_WIDTH_80: 2751 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2752 break; 2753 default: 2754 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2755 break; 2756 } 2757 2758 /* don't require special VHT peer rates */ 2759 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2760 2761 return pos + sizeof(struct ieee80211_vht_operation); 2762 } 2763 2764 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2765 struct cfg80211_chan_def *chandef) 2766 { 2767 enum nl80211_channel_type channel_type; 2768 2769 if (!ht_oper) 2770 return false; 2771 2772 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2773 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2774 channel_type = NL80211_CHAN_HT20; 2775 break; 2776 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2777 channel_type = NL80211_CHAN_HT40PLUS; 2778 break; 2779 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2780 channel_type = NL80211_CHAN_HT40MINUS; 2781 break; 2782 default: 2783 channel_type = NL80211_CHAN_NO_HT; 2784 return false; 2785 } 2786 2787 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2788 return true; 2789 } 2790 2791 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, 2792 const struct ieee80211_vht_operation *oper, 2793 const struct ieee80211_ht_operation *htop, 2794 struct cfg80211_chan_def *chandef) 2795 { 2796 struct cfg80211_chan_def new = *chandef; 2797 int cf0, cf1; 2798 int ccfs0, ccfs1, ccfs2; 2799 int ccf0, ccf1; 2800 2801 if (!oper || !htop) 2802 return false; 2803 2804 ccfs0 = oper->center_freq_seg0_idx; 2805 ccfs1 = oper->center_freq_seg1_idx; 2806 ccfs2 = (le16_to_cpu(htop->operation_mode) & 2807 IEEE80211_HT_OP_MODE_CCFS2_MASK) 2808 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 2809 2810 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */ 2811 ccf0 = ccfs0; 2812 ccf1 = ccfs1; 2813 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 2814 ccf1 = ccfs2; 2815 2816 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 2817 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 2818 2819 switch (oper->chan_width) { 2820 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2821 /* just use HT information directly */ 2822 break; 2823 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2824 new.width = NL80211_CHAN_WIDTH_80; 2825 new.center_freq1 = cf0; 2826 /* If needed, adjust based on the newer interop workaround. */ 2827 if (ccf1) { 2828 unsigned int diff; 2829 2830 diff = abs(ccf1 - ccf0); 2831 if (diff == 8) { 2832 new.width = NL80211_CHAN_WIDTH_160; 2833 new.center_freq1 = cf1; 2834 } else if (diff > 8) { 2835 new.width = NL80211_CHAN_WIDTH_80P80; 2836 new.center_freq2 = cf1; 2837 } 2838 } 2839 break; 2840 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2841 /* deprecated encoding */ 2842 new.width = NL80211_CHAN_WIDTH_160; 2843 new.center_freq1 = cf0; 2844 break; 2845 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2846 /* deprecated encoding */ 2847 new.width = NL80211_CHAN_WIDTH_80P80; 2848 new.center_freq1 = cf0; 2849 new.center_freq2 = cf1; 2850 break; 2851 default: 2852 return false; 2853 } 2854 2855 if (!cfg80211_chandef_valid(&new)) 2856 return false; 2857 2858 *chandef = new; 2859 return true; 2860 } 2861 2862 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2863 const struct ieee80211_supported_band *sband, 2864 const u8 *srates, int srates_len, u32 *rates) 2865 { 2866 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2867 int shift = ieee80211_chandef_get_shift(chandef); 2868 struct ieee80211_rate *br; 2869 int brate, rate, i, j, count = 0; 2870 2871 *rates = 0; 2872 2873 for (i = 0; i < srates_len; i++) { 2874 rate = srates[i] & 0x7f; 2875 2876 for (j = 0; j < sband->n_bitrates; j++) { 2877 br = &sband->bitrates[j]; 2878 if ((rate_flags & br->flags) != rate_flags) 2879 continue; 2880 2881 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2882 if (brate == rate) { 2883 *rates |= BIT(j); 2884 count++; 2885 break; 2886 } 2887 } 2888 } 2889 return count; 2890 } 2891 2892 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2893 struct sk_buff *skb, bool need_basic, 2894 enum nl80211_band band) 2895 { 2896 struct ieee80211_local *local = sdata->local; 2897 struct ieee80211_supported_band *sband; 2898 int rate, shift; 2899 u8 i, rates, *pos; 2900 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2901 u32 rate_flags; 2902 2903 shift = ieee80211_vif_get_shift(&sdata->vif); 2904 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2905 sband = local->hw.wiphy->bands[band]; 2906 rates = 0; 2907 for (i = 0; i < sband->n_bitrates; i++) { 2908 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2909 continue; 2910 rates++; 2911 } 2912 if (rates > 8) 2913 rates = 8; 2914 2915 if (skb_tailroom(skb) < rates + 2) 2916 return -ENOMEM; 2917 2918 pos = skb_put(skb, rates + 2); 2919 *pos++ = WLAN_EID_SUPP_RATES; 2920 *pos++ = rates; 2921 for (i = 0; i < rates; i++) { 2922 u8 basic = 0; 2923 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2924 continue; 2925 2926 if (need_basic && basic_rates & BIT(i)) 2927 basic = 0x80; 2928 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2929 5 * (1 << shift)); 2930 *pos++ = basic | (u8) rate; 2931 } 2932 2933 return 0; 2934 } 2935 2936 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2937 struct sk_buff *skb, bool need_basic, 2938 enum nl80211_band band) 2939 { 2940 struct ieee80211_local *local = sdata->local; 2941 struct ieee80211_supported_band *sband; 2942 int rate, shift; 2943 u8 i, exrates, *pos; 2944 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2945 u32 rate_flags; 2946 2947 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2948 shift = ieee80211_vif_get_shift(&sdata->vif); 2949 2950 sband = local->hw.wiphy->bands[band]; 2951 exrates = 0; 2952 for (i = 0; i < sband->n_bitrates; i++) { 2953 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2954 continue; 2955 exrates++; 2956 } 2957 2958 if (exrates > 8) 2959 exrates -= 8; 2960 else 2961 exrates = 0; 2962 2963 if (skb_tailroom(skb) < exrates + 2) 2964 return -ENOMEM; 2965 2966 if (exrates) { 2967 pos = skb_put(skb, exrates + 2); 2968 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2969 *pos++ = exrates; 2970 for (i = 8; i < sband->n_bitrates; i++) { 2971 u8 basic = 0; 2972 if ((rate_flags & sband->bitrates[i].flags) 2973 != rate_flags) 2974 continue; 2975 if (need_basic && basic_rates & BIT(i)) 2976 basic = 0x80; 2977 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2978 5 * (1 << shift)); 2979 *pos++ = basic | (u8) rate; 2980 } 2981 } 2982 return 0; 2983 } 2984 2985 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2986 { 2987 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2988 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2989 2990 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2991 /* non-managed type inferfaces */ 2992 return 0; 2993 } 2994 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2995 } 2996 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2997 2998 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2999 { 3000 if (!mcs) 3001 return 1; 3002 3003 /* TODO: consider rx_highest */ 3004 3005 if (mcs->rx_mask[3]) 3006 return 4; 3007 if (mcs->rx_mask[2]) 3008 return 3; 3009 if (mcs->rx_mask[1]) 3010 return 2; 3011 return 1; 3012 } 3013 3014 /** 3015 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3016 * @local: mac80211 hw info struct 3017 * @status: RX status 3018 * @mpdu_len: total MPDU length (including FCS) 3019 * @mpdu_offset: offset into MPDU to calculate timestamp at 3020 * 3021 * This function calculates the RX timestamp at the given MPDU offset, taking 3022 * into account what the RX timestamp was. An offset of 0 will just normalize 3023 * the timestamp to TSF at beginning of MPDU reception. 3024 */ 3025 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3026 struct ieee80211_rx_status *status, 3027 unsigned int mpdu_len, 3028 unsigned int mpdu_offset) 3029 { 3030 u64 ts = status->mactime; 3031 struct rate_info ri; 3032 u16 rate; 3033 3034 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3035 return 0; 3036 3037 memset(&ri, 0, sizeof(ri)); 3038 3039 ri.bw = status->bw; 3040 3041 /* Fill cfg80211 rate info */ 3042 switch (status->encoding) { 3043 case RX_ENC_HT: 3044 ri.mcs = status->rate_idx; 3045 ri.flags |= RATE_INFO_FLAGS_MCS; 3046 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3047 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3048 break; 3049 case RX_ENC_VHT: 3050 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3051 ri.mcs = status->rate_idx; 3052 ri.nss = status->nss; 3053 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3054 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3055 break; 3056 default: 3057 WARN_ON(1); 3058 /* fall through */ 3059 case RX_ENC_LEGACY: { 3060 struct ieee80211_supported_band *sband; 3061 int shift = 0; 3062 int bitrate; 3063 3064 switch (status->bw) { 3065 case RATE_INFO_BW_10: 3066 shift = 1; 3067 break; 3068 case RATE_INFO_BW_5: 3069 shift = 2; 3070 break; 3071 } 3072 3073 sband = local->hw.wiphy->bands[status->band]; 3074 bitrate = sband->bitrates[status->rate_idx].bitrate; 3075 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3076 3077 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3078 /* TODO: handle HT/VHT preambles */ 3079 if (status->band == NL80211_BAND_5GHZ) { 3080 ts += 20 << shift; 3081 mpdu_offset += 2; 3082 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3083 ts += 96; 3084 } else { 3085 ts += 192; 3086 } 3087 } 3088 break; 3089 } 3090 } 3091 3092 rate = cfg80211_calculate_bitrate(&ri); 3093 if (WARN_ONCE(!rate, 3094 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3095 (unsigned long long)status->flag, status->rate_idx, 3096 status->nss)) 3097 return 0; 3098 3099 /* rewind from end of MPDU */ 3100 if (status->flag & RX_FLAG_MACTIME_END) 3101 ts -= mpdu_len * 8 * 10 / rate; 3102 3103 ts += mpdu_offset * 8 * 10 / rate; 3104 3105 return ts; 3106 } 3107 3108 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3109 { 3110 struct ieee80211_sub_if_data *sdata; 3111 struct cfg80211_chan_def chandef; 3112 3113 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3114 ASSERT_RTNL(); 3115 3116 mutex_lock(&local->mtx); 3117 list_for_each_entry(sdata, &local->interfaces, list) { 3118 /* it might be waiting for the local->mtx, but then 3119 * by the time it gets it, sdata->wdev.cac_started 3120 * will no longer be true 3121 */ 3122 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3123 3124 if (sdata->wdev.cac_started) { 3125 chandef = sdata->vif.bss_conf.chandef; 3126 ieee80211_vif_release_channel(sdata); 3127 cfg80211_cac_event(sdata->dev, 3128 &chandef, 3129 NL80211_RADAR_CAC_ABORTED, 3130 GFP_KERNEL); 3131 } 3132 } 3133 mutex_unlock(&local->mtx); 3134 } 3135 3136 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3137 { 3138 struct ieee80211_local *local = 3139 container_of(work, struct ieee80211_local, radar_detected_work); 3140 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3141 struct ieee80211_chanctx *ctx; 3142 int num_chanctx = 0; 3143 3144 mutex_lock(&local->chanctx_mtx); 3145 list_for_each_entry(ctx, &local->chanctx_list, list) { 3146 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3147 continue; 3148 3149 num_chanctx++; 3150 chandef = ctx->conf.def; 3151 } 3152 mutex_unlock(&local->chanctx_mtx); 3153 3154 rtnl_lock(); 3155 ieee80211_dfs_cac_cancel(local); 3156 rtnl_unlock(); 3157 3158 if (num_chanctx > 1) 3159 /* XXX: multi-channel is not supported yet */ 3160 WARN_ON(1); 3161 else 3162 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3163 } 3164 3165 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3166 { 3167 struct ieee80211_local *local = hw_to_local(hw); 3168 3169 trace_api_radar_detected(local); 3170 3171 schedule_work(&local->radar_detected_work); 3172 } 3173 EXPORT_SYMBOL(ieee80211_radar_detected); 3174 3175 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3176 { 3177 u32 ret; 3178 int tmp; 3179 3180 switch (c->width) { 3181 case NL80211_CHAN_WIDTH_20: 3182 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3183 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3184 break; 3185 case NL80211_CHAN_WIDTH_40: 3186 c->width = NL80211_CHAN_WIDTH_20; 3187 c->center_freq1 = c->chan->center_freq; 3188 ret = IEEE80211_STA_DISABLE_40MHZ | 3189 IEEE80211_STA_DISABLE_VHT; 3190 break; 3191 case NL80211_CHAN_WIDTH_80: 3192 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3193 /* n_P40 */ 3194 tmp /= 2; 3195 /* freq_P40 */ 3196 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3197 c->width = NL80211_CHAN_WIDTH_40; 3198 ret = IEEE80211_STA_DISABLE_VHT; 3199 break; 3200 case NL80211_CHAN_WIDTH_80P80: 3201 c->center_freq2 = 0; 3202 c->width = NL80211_CHAN_WIDTH_80; 3203 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3204 IEEE80211_STA_DISABLE_160MHZ; 3205 break; 3206 case NL80211_CHAN_WIDTH_160: 3207 /* n_P20 */ 3208 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3209 /* n_P80 */ 3210 tmp /= 4; 3211 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3212 c->width = NL80211_CHAN_WIDTH_80; 3213 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3214 IEEE80211_STA_DISABLE_160MHZ; 3215 break; 3216 default: 3217 case NL80211_CHAN_WIDTH_20_NOHT: 3218 WARN_ON_ONCE(1); 3219 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3220 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3221 break; 3222 case NL80211_CHAN_WIDTH_5: 3223 case NL80211_CHAN_WIDTH_10: 3224 WARN_ON_ONCE(1); 3225 /* keep c->width */ 3226 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3227 break; 3228 } 3229 3230 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3231 3232 return ret; 3233 } 3234 3235 /* 3236 * Returns true if smps_mode_new is strictly more restrictive than 3237 * smps_mode_old. 3238 */ 3239 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3240 enum ieee80211_smps_mode smps_mode_new) 3241 { 3242 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3243 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3244 return false; 3245 3246 switch (smps_mode_old) { 3247 case IEEE80211_SMPS_STATIC: 3248 return false; 3249 case IEEE80211_SMPS_DYNAMIC: 3250 return smps_mode_new == IEEE80211_SMPS_STATIC; 3251 case IEEE80211_SMPS_OFF: 3252 return smps_mode_new != IEEE80211_SMPS_OFF; 3253 default: 3254 WARN_ON(1); 3255 } 3256 3257 return false; 3258 } 3259 3260 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3261 struct cfg80211_csa_settings *csa_settings) 3262 { 3263 struct sk_buff *skb; 3264 struct ieee80211_mgmt *mgmt; 3265 struct ieee80211_local *local = sdata->local; 3266 int freq; 3267 int hdr_len = offsetofend(struct ieee80211_mgmt, 3268 u.action.u.chan_switch); 3269 u8 *pos; 3270 3271 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3272 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3273 return -EOPNOTSUPP; 3274 3275 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3276 5 + /* channel switch announcement element */ 3277 3 + /* secondary channel offset element */ 3278 5 + /* wide bandwidth channel switch announcement */ 3279 8); /* mesh channel switch parameters element */ 3280 if (!skb) 3281 return -ENOMEM; 3282 3283 skb_reserve(skb, local->tx_headroom); 3284 mgmt = skb_put_zero(skb, hdr_len); 3285 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3286 IEEE80211_STYPE_ACTION); 3287 3288 eth_broadcast_addr(mgmt->da); 3289 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3290 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3291 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3292 } else { 3293 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3294 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3295 } 3296 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3297 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3298 pos = skb_put(skb, 5); 3299 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3300 *pos++ = 3; /* IE length */ 3301 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3302 freq = csa_settings->chandef.chan->center_freq; 3303 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3304 *pos++ = csa_settings->count; /* count */ 3305 3306 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3307 enum nl80211_channel_type ch_type; 3308 3309 skb_put(skb, 3); 3310 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3311 *pos++ = 1; /* IE length */ 3312 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3313 if (ch_type == NL80211_CHAN_HT40PLUS) 3314 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3315 else 3316 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3317 } 3318 3319 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3320 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3321 3322 skb_put(skb, 8); 3323 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3324 *pos++ = 6; /* IE length */ 3325 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3326 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3327 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3328 *pos++ |= csa_settings->block_tx ? 3329 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3330 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3331 pos += 2; 3332 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3333 pos += 2; 3334 } 3335 3336 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3337 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3338 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3339 skb_put(skb, 5); 3340 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3341 } 3342 3343 ieee80211_tx_skb(sdata, skb); 3344 return 0; 3345 } 3346 3347 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3348 { 3349 return !(cs == NULL || cs->cipher == 0 || 3350 cs->hdr_len < cs->pn_len + cs->pn_off || 3351 cs->hdr_len <= cs->key_idx_off || 3352 cs->key_idx_shift > 7 || 3353 cs->key_idx_mask == 0); 3354 } 3355 3356 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3357 { 3358 int i; 3359 3360 /* Ensure we have enough iftype bitmap space for all iftype values */ 3361 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3362 3363 for (i = 0; i < n; i++) 3364 if (!ieee80211_cs_valid(&cs[i])) 3365 return false; 3366 3367 return true; 3368 } 3369 3370 const struct ieee80211_cipher_scheme * 3371 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3372 enum nl80211_iftype iftype) 3373 { 3374 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3375 int n = local->hw.n_cipher_schemes; 3376 int i; 3377 const struct ieee80211_cipher_scheme *cs = NULL; 3378 3379 for (i = 0; i < n; i++) { 3380 if (l[i].cipher == cipher) { 3381 cs = &l[i]; 3382 break; 3383 } 3384 } 3385 3386 if (!cs || !(cs->iftype & BIT(iftype))) 3387 return NULL; 3388 3389 return cs; 3390 } 3391 3392 int ieee80211_cs_headroom(struct ieee80211_local *local, 3393 struct cfg80211_crypto_settings *crypto, 3394 enum nl80211_iftype iftype) 3395 { 3396 const struct ieee80211_cipher_scheme *cs; 3397 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3398 int i; 3399 3400 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3401 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3402 iftype); 3403 3404 if (cs && headroom < cs->hdr_len) 3405 headroom = cs->hdr_len; 3406 } 3407 3408 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3409 if (cs && headroom < cs->hdr_len) 3410 headroom = cs->hdr_len; 3411 3412 return headroom; 3413 } 3414 3415 static bool 3416 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3417 { 3418 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3419 int skip; 3420 3421 if (end > 0) 3422 return false; 3423 3424 /* One shot NOA */ 3425 if (data->count[i] == 1) 3426 return false; 3427 3428 if (data->desc[i].interval == 0) 3429 return false; 3430 3431 /* End time is in the past, check for repetitions */ 3432 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3433 if (data->count[i] < 255) { 3434 if (data->count[i] <= skip) { 3435 data->count[i] = 0; 3436 return false; 3437 } 3438 3439 data->count[i] -= skip; 3440 } 3441 3442 data->desc[i].start += skip * data->desc[i].interval; 3443 3444 return true; 3445 } 3446 3447 static bool 3448 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3449 s32 *offset) 3450 { 3451 bool ret = false; 3452 int i; 3453 3454 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3455 s32 cur; 3456 3457 if (!data->count[i]) 3458 continue; 3459 3460 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3461 ret = true; 3462 3463 cur = data->desc[i].start - tsf; 3464 if (cur > *offset) 3465 continue; 3466 3467 cur = data->desc[i].start + data->desc[i].duration - tsf; 3468 if (cur > *offset) 3469 *offset = cur; 3470 } 3471 3472 return ret; 3473 } 3474 3475 static u32 3476 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3477 { 3478 s32 offset = 0; 3479 int tries = 0; 3480 /* 3481 * arbitrary limit, used to avoid infinite loops when combined NoA 3482 * descriptors cover the full time period. 3483 */ 3484 int max_tries = 5; 3485 3486 ieee80211_extend_absent_time(data, tsf, &offset); 3487 do { 3488 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3489 break; 3490 3491 tries++; 3492 } while (tries < max_tries); 3493 3494 return offset; 3495 } 3496 3497 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3498 { 3499 u32 next_offset = BIT(31) - 1; 3500 int i; 3501 3502 data->absent = 0; 3503 data->has_next_tsf = false; 3504 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3505 s32 start; 3506 3507 if (!data->count[i]) 3508 continue; 3509 3510 ieee80211_extend_noa_desc(data, tsf, i); 3511 start = data->desc[i].start - tsf; 3512 if (start <= 0) 3513 data->absent |= BIT(i); 3514 3515 if (next_offset > start) 3516 next_offset = start; 3517 3518 data->has_next_tsf = true; 3519 } 3520 3521 if (data->absent) 3522 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3523 3524 data->next_tsf = tsf + next_offset; 3525 } 3526 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3527 3528 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3529 struct ieee80211_noa_data *data, u32 tsf) 3530 { 3531 int ret = 0; 3532 int i; 3533 3534 memset(data, 0, sizeof(*data)); 3535 3536 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3537 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3538 3539 if (!desc->count || !desc->duration) 3540 continue; 3541 3542 data->count[i] = desc->count; 3543 data->desc[i].start = le32_to_cpu(desc->start_time); 3544 data->desc[i].duration = le32_to_cpu(desc->duration); 3545 data->desc[i].interval = le32_to_cpu(desc->interval); 3546 3547 if (data->count[i] > 1 && 3548 data->desc[i].interval < data->desc[i].duration) 3549 continue; 3550 3551 ieee80211_extend_noa_desc(data, tsf, i); 3552 ret++; 3553 } 3554 3555 if (ret) 3556 ieee80211_update_p2p_noa(data, tsf); 3557 3558 return ret; 3559 } 3560 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3561 3562 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3563 struct ieee80211_sub_if_data *sdata) 3564 { 3565 u64 tsf = drv_get_tsf(local, sdata); 3566 u64 dtim_count = 0; 3567 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3568 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3569 struct ps_data *ps; 3570 u8 bcns_from_dtim; 3571 3572 if (tsf == -1ULL || !beacon_int || !dtim_period) 3573 return; 3574 3575 if (sdata->vif.type == NL80211_IFTYPE_AP || 3576 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3577 if (!sdata->bss) 3578 return; 3579 3580 ps = &sdata->bss->ps; 3581 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3582 ps = &sdata->u.mesh.ps; 3583 } else { 3584 return; 3585 } 3586 3587 /* 3588 * actually finds last dtim_count, mac80211 will update in 3589 * __beacon_add_tim(). 3590 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3591 */ 3592 do_div(tsf, beacon_int); 3593 bcns_from_dtim = do_div(tsf, dtim_period); 3594 /* just had a DTIM */ 3595 if (!bcns_from_dtim) 3596 dtim_count = 0; 3597 else 3598 dtim_count = dtim_period - bcns_from_dtim; 3599 3600 ps->dtim_count = dtim_count; 3601 } 3602 3603 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3604 struct ieee80211_chanctx *ctx) 3605 { 3606 struct ieee80211_sub_if_data *sdata; 3607 u8 radar_detect = 0; 3608 3609 lockdep_assert_held(&local->chanctx_mtx); 3610 3611 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3612 return 0; 3613 3614 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3615 if (sdata->reserved_radar_required) 3616 radar_detect |= BIT(sdata->reserved_chandef.width); 3617 3618 /* 3619 * An in-place reservation context should not have any assigned vifs 3620 * until it replaces the other context. 3621 */ 3622 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3623 !list_empty(&ctx->assigned_vifs)); 3624 3625 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3626 if (sdata->radar_required) 3627 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3628 3629 return radar_detect; 3630 } 3631 3632 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3633 const struct cfg80211_chan_def *chandef, 3634 enum ieee80211_chanctx_mode chanmode, 3635 u8 radar_detect) 3636 { 3637 struct ieee80211_local *local = sdata->local; 3638 struct ieee80211_sub_if_data *sdata_iter; 3639 enum nl80211_iftype iftype = sdata->wdev.iftype; 3640 struct ieee80211_chanctx *ctx; 3641 int total = 1; 3642 struct iface_combination_params params = { 3643 .radar_detect = radar_detect, 3644 }; 3645 3646 lockdep_assert_held(&local->chanctx_mtx); 3647 3648 if (WARN_ON(hweight32(radar_detect) > 1)) 3649 return -EINVAL; 3650 3651 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3652 !chandef->chan)) 3653 return -EINVAL; 3654 3655 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3656 return -EINVAL; 3657 3658 if (sdata->vif.type == NL80211_IFTYPE_AP || 3659 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3660 /* 3661 * always passing this is harmless, since it'll be the 3662 * same value that cfg80211 finds if it finds the same 3663 * interface ... and that's always allowed 3664 */ 3665 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3666 } 3667 3668 /* Always allow software iftypes */ 3669 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3670 if (radar_detect) 3671 return -EINVAL; 3672 return 0; 3673 } 3674 3675 if (chandef) 3676 params.num_different_channels = 1; 3677 3678 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3679 params.iftype_num[iftype] = 1; 3680 3681 list_for_each_entry(ctx, &local->chanctx_list, list) { 3682 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3683 continue; 3684 params.radar_detect |= 3685 ieee80211_chanctx_radar_detect(local, ctx); 3686 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3687 params.num_different_channels++; 3688 continue; 3689 } 3690 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3691 cfg80211_chandef_compatible(chandef, 3692 &ctx->conf.def)) 3693 continue; 3694 params.num_different_channels++; 3695 } 3696 3697 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3698 struct wireless_dev *wdev_iter; 3699 3700 wdev_iter = &sdata_iter->wdev; 3701 3702 if (sdata_iter == sdata || 3703 !ieee80211_sdata_running(sdata_iter) || 3704 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3705 continue; 3706 3707 params.iftype_num[wdev_iter->iftype]++; 3708 total++; 3709 } 3710 3711 if (total == 1 && !params.radar_detect) 3712 return 0; 3713 3714 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3715 } 3716 3717 static void 3718 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3719 void *data) 3720 { 3721 u32 *max_num_different_channels = data; 3722 3723 *max_num_different_channels = max(*max_num_different_channels, 3724 c->num_different_channels); 3725 } 3726 3727 int ieee80211_max_num_channels(struct ieee80211_local *local) 3728 { 3729 struct ieee80211_sub_if_data *sdata; 3730 struct ieee80211_chanctx *ctx; 3731 u32 max_num_different_channels = 1; 3732 int err; 3733 struct iface_combination_params params = {0}; 3734 3735 lockdep_assert_held(&local->chanctx_mtx); 3736 3737 list_for_each_entry(ctx, &local->chanctx_list, list) { 3738 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3739 continue; 3740 3741 params.num_different_channels++; 3742 3743 params.radar_detect |= 3744 ieee80211_chanctx_radar_detect(local, ctx); 3745 } 3746 3747 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3748 params.iftype_num[sdata->wdev.iftype]++; 3749 3750 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3751 ieee80211_iter_max_chans, 3752 &max_num_different_channels); 3753 if (err < 0) 3754 return err; 3755 3756 return max_num_different_channels; 3757 } 3758 3759 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3760 { 3761 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3762 *buf++ = 7; /* len */ 3763 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3764 *buf++ = 0x50; 3765 *buf++ = 0xf2; 3766 *buf++ = 2; /* WME */ 3767 *buf++ = 0; /* WME info */ 3768 *buf++ = 1; /* WME ver */ 3769 *buf++ = qosinfo; /* U-APSD no in use */ 3770 3771 return buf; 3772 } 3773 3774 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3775 unsigned long *frame_cnt, 3776 unsigned long *byte_cnt) 3777 { 3778 struct txq_info *txqi = to_txq_info(txq); 3779 u32 frag_cnt = 0, frag_bytes = 0; 3780 struct sk_buff *skb; 3781 3782 skb_queue_walk(&txqi->frags, skb) { 3783 frag_cnt++; 3784 frag_bytes += skb->len; 3785 } 3786 3787 if (frame_cnt) 3788 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3789 3790 if (byte_cnt) 3791 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3792 } 3793 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3794 3795 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3796 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3797 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3798 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3799 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3800 }; 3801