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) 2018-2019 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 static u32 895 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 896 struct ieee802_11_elems *elems, 897 u64 filter, u32 crc, 898 const struct element *check_inherit) 899 { 900 const struct element *elem; 901 bool calc_crc = filter != 0; 902 DECLARE_BITMAP(seen_elems, 256); 903 const u8 *ie; 904 905 bitmap_zero(seen_elems, 256); 906 907 for_each_element(elem, start, len) { 908 bool elem_parse_failed; 909 u8 id = elem->id; 910 u8 elen = elem->datalen; 911 const u8 *pos = elem->data; 912 913 if (check_inherit && 914 !cfg80211_is_element_inherited(elem, 915 check_inherit)) 916 continue; 917 918 switch (id) { 919 case WLAN_EID_SSID: 920 case WLAN_EID_SUPP_RATES: 921 case WLAN_EID_FH_PARAMS: 922 case WLAN_EID_DS_PARAMS: 923 case WLAN_EID_CF_PARAMS: 924 case WLAN_EID_TIM: 925 case WLAN_EID_IBSS_PARAMS: 926 case WLAN_EID_CHALLENGE: 927 case WLAN_EID_RSN: 928 case WLAN_EID_ERP_INFO: 929 case WLAN_EID_EXT_SUPP_RATES: 930 case WLAN_EID_HT_CAPABILITY: 931 case WLAN_EID_HT_OPERATION: 932 case WLAN_EID_VHT_CAPABILITY: 933 case WLAN_EID_VHT_OPERATION: 934 case WLAN_EID_MESH_ID: 935 case WLAN_EID_MESH_CONFIG: 936 case WLAN_EID_PEER_MGMT: 937 case WLAN_EID_PREQ: 938 case WLAN_EID_PREP: 939 case WLAN_EID_PERR: 940 case WLAN_EID_RANN: 941 case WLAN_EID_CHANNEL_SWITCH: 942 case WLAN_EID_EXT_CHANSWITCH_ANN: 943 case WLAN_EID_COUNTRY: 944 case WLAN_EID_PWR_CONSTRAINT: 945 case WLAN_EID_TIMEOUT_INTERVAL: 946 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 947 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 948 case WLAN_EID_CHAN_SWITCH_PARAM: 949 case WLAN_EID_EXT_CAPABILITY: 950 case WLAN_EID_CHAN_SWITCH_TIMING: 951 case WLAN_EID_LINK_ID: 952 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 953 /* 954 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 955 * that if the content gets bigger it might be needed more than once 956 */ 957 if (test_bit(id, seen_elems)) { 958 elems->parse_error = true; 959 continue; 960 } 961 break; 962 } 963 964 if (calc_crc && id < 64 && (filter & (1ULL << id))) 965 crc = crc32_be(crc, pos - 2, elen + 2); 966 967 elem_parse_failed = false; 968 969 switch (id) { 970 case WLAN_EID_LINK_ID: 971 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 972 elem_parse_failed = true; 973 break; 974 } 975 elems->lnk_id = (void *)(pos - 2); 976 break; 977 case WLAN_EID_CHAN_SWITCH_TIMING: 978 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 979 elem_parse_failed = true; 980 break; 981 } 982 elems->ch_sw_timing = (void *)pos; 983 break; 984 case WLAN_EID_EXT_CAPABILITY: 985 elems->ext_capab = pos; 986 elems->ext_capab_len = elen; 987 break; 988 case WLAN_EID_SSID: 989 elems->ssid = pos; 990 elems->ssid_len = elen; 991 break; 992 case WLAN_EID_SUPP_RATES: 993 elems->supp_rates = pos; 994 elems->supp_rates_len = elen; 995 break; 996 case WLAN_EID_DS_PARAMS: 997 if (elen >= 1) 998 elems->ds_params = pos; 999 else 1000 elem_parse_failed = true; 1001 break; 1002 case WLAN_EID_TIM: 1003 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1004 elems->tim = (void *)pos; 1005 elems->tim_len = elen; 1006 } else 1007 elem_parse_failed = true; 1008 break; 1009 case WLAN_EID_CHALLENGE: 1010 elems->challenge = pos; 1011 elems->challenge_len = elen; 1012 break; 1013 case WLAN_EID_VENDOR_SPECIFIC: 1014 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1015 pos[2] == 0xf2) { 1016 /* Microsoft OUI (00:50:F2) */ 1017 1018 if (calc_crc) 1019 crc = crc32_be(crc, pos - 2, elen + 2); 1020 1021 if (elen >= 5 && pos[3] == 2) { 1022 /* OUI Type 2 - WMM IE */ 1023 if (pos[4] == 0) { 1024 elems->wmm_info = pos; 1025 elems->wmm_info_len = elen; 1026 } else if (pos[4] == 1) { 1027 elems->wmm_param = pos; 1028 elems->wmm_param_len = elen; 1029 } 1030 } 1031 } 1032 break; 1033 case WLAN_EID_RSN: 1034 elems->rsn = pos; 1035 elems->rsn_len = elen; 1036 break; 1037 case WLAN_EID_ERP_INFO: 1038 if (elen >= 1) 1039 elems->erp_info = pos; 1040 else 1041 elem_parse_failed = true; 1042 break; 1043 case WLAN_EID_EXT_SUPP_RATES: 1044 elems->ext_supp_rates = pos; 1045 elems->ext_supp_rates_len = elen; 1046 break; 1047 case WLAN_EID_HT_CAPABILITY: 1048 if (elen >= sizeof(struct ieee80211_ht_cap)) 1049 elems->ht_cap_elem = (void *)pos; 1050 else 1051 elem_parse_failed = true; 1052 break; 1053 case WLAN_EID_HT_OPERATION: 1054 if (elen >= sizeof(struct ieee80211_ht_operation)) 1055 elems->ht_operation = (void *)pos; 1056 else 1057 elem_parse_failed = true; 1058 break; 1059 case WLAN_EID_VHT_CAPABILITY: 1060 if (elen >= sizeof(struct ieee80211_vht_cap)) 1061 elems->vht_cap_elem = (void *)pos; 1062 else 1063 elem_parse_failed = true; 1064 break; 1065 case WLAN_EID_VHT_OPERATION: 1066 if (elen >= sizeof(struct ieee80211_vht_operation)) 1067 elems->vht_operation = (void *)pos; 1068 else 1069 elem_parse_failed = true; 1070 break; 1071 case WLAN_EID_OPMODE_NOTIF: 1072 if (elen > 0) 1073 elems->opmode_notif = pos; 1074 else 1075 elem_parse_failed = true; 1076 break; 1077 case WLAN_EID_MESH_ID: 1078 elems->mesh_id = pos; 1079 elems->mesh_id_len = elen; 1080 break; 1081 case WLAN_EID_MESH_CONFIG: 1082 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1083 elems->mesh_config = (void *)pos; 1084 else 1085 elem_parse_failed = true; 1086 break; 1087 case WLAN_EID_PEER_MGMT: 1088 elems->peering = pos; 1089 elems->peering_len = elen; 1090 break; 1091 case WLAN_EID_MESH_AWAKE_WINDOW: 1092 if (elen >= 2) 1093 elems->awake_window = (void *)pos; 1094 break; 1095 case WLAN_EID_PREQ: 1096 elems->preq = pos; 1097 elems->preq_len = elen; 1098 break; 1099 case WLAN_EID_PREP: 1100 elems->prep = pos; 1101 elems->prep_len = elen; 1102 break; 1103 case WLAN_EID_PERR: 1104 elems->perr = pos; 1105 elems->perr_len = elen; 1106 break; 1107 case WLAN_EID_RANN: 1108 if (elen >= sizeof(struct ieee80211_rann_ie)) 1109 elems->rann = (void *)pos; 1110 else 1111 elem_parse_failed = true; 1112 break; 1113 case WLAN_EID_CHANNEL_SWITCH: 1114 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1115 elem_parse_failed = true; 1116 break; 1117 } 1118 elems->ch_switch_ie = (void *)pos; 1119 break; 1120 case WLAN_EID_EXT_CHANSWITCH_ANN: 1121 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1122 elem_parse_failed = true; 1123 break; 1124 } 1125 elems->ext_chansw_ie = (void *)pos; 1126 break; 1127 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1128 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1129 elem_parse_failed = true; 1130 break; 1131 } 1132 elems->sec_chan_offs = (void *)pos; 1133 break; 1134 case WLAN_EID_CHAN_SWITCH_PARAM: 1135 if (elen != 1136 sizeof(*elems->mesh_chansw_params_ie)) { 1137 elem_parse_failed = true; 1138 break; 1139 } 1140 elems->mesh_chansw_params_ie = (void *)pos; 1141 break; 1142 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1143 if (!action || 1144 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1145 elem_parse_failed = true; 1146 break; 1147 } 1148 elems->wide_bw_chansw_ie = (void *)pos; 1149 break; 1150 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1151 if (action) { 1152 elem_parse_failed = true; 1153 break; 1154 } 1155 /* 1156 * This is a bit tricky, but as we only care about 1157 * the wide bandwidth channel switch element, so 1158 * just parse it out manually. 1159 */ 1160 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1161 pos, elen); 1162 if (ie) { 1163 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1164 elems->wide_bw_chansw_ie = 1165 (void *)(ie + 2); 1166 else 1167 elem_parse_failed = true; 1168 } 1169 break; 1170 case WLAN_EID_COUNTRY: 1171 elems->country_elem = pos; 1172 elems->country_elem_len = elen; 1173 break; 1174 case WLAN_EID_PWR_CONSTRAINT: 1175 if (elen != 1) { 1176 elem_parse_failed = true; 1177 break; 1178 } 1179 elems->pwr_constr_elem = pos; 1180 break; 1181 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1182 /* Lots of different options exist, but we only care 1183 * about the Dynamic Transmit Power Control element. 1184 * First check for the Cisco OUI, then for the DTPC 1185 * tag (0x00). 1186 */ 1187 if (elen < 4) { 1188 elem_parse_failed = true; 1189 break; 1190 } 1191 1192 if (pos[0] != 0x00 || pos[1] != 0x40 || 1193 pos[2] != 0x96 || pos[3] != 0x00) 1194 break; 1195 1196 if (elen != 6) { 1197 elem_parse_failed = true; 1198 break; 1199 } 1200 1201 if (calc_crc) 1202 crc = crc32_be(crc, pos - 2, elen + 2); 1203 1204 elems->cisco_dtpc_elem = pos; 1205 break; 1206 case WLAN_EID_TIMEOUT_INTERVAL: 1207 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1208 elems->timeout_int = (void *)pos; 1209 else 1210 elem_parse_failed = true; 1211 break; 1212 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1213 if (elen >= sizeof(*elems->max_idle_period_ie)) 1214 elems->max_idle_period_ie = (void *)pos; 1215 break; 1216 case WLAN_EID_EXTENSION: 1217 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA && 1218 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) { 1219 elems->mu_edca_param_set = (void *)&pos[1]; 1220 if (calc_crc) 1221 crc = crc32_be(crc, pos - 2, elen + 2); 1222 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) { 1223 elems->he_cap = (void *)&pos[1]; 1224 elems->he_cap_len = elen - 1; 1225 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION && 1226 elen >= sizeof(*elems->he_operation) && 1227 elen >= ieee80211_he_oper_size(&pos[1])) { 1228 elems->he_operation = (void *)&pos[1]; 1229 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) { 1230 elems->uora_element = (void *)&pos[1]; 1231 } else if (pos[0] == 1232 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME && 1233 elen == 4) { 1234 elems->max_channel_switch_time = pos + 1; 1235 } else if (pos[0] == 1236 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION && 1237 elen == 3) { 1238 elems->mbssid_config_ie = (void *)&pos[1]; 1239 } 1240 break; 1241 default: 1242 break; 1243 } 1244 1245 if (elem_parse_failed) 1246 elems->parse_error = true; 1247 else 1248 __set_bit(id, seen_elems); 1249 } 1250 1251 if (!for_each_element_completed(elem, start, len)) 1252 elems->parse_error = true; 1253 1254 return crc; 1255 } 1256 1257 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1258 struct ieee802_11_elems *elems, 1259 u8 *transmitter_bssid, 1260 u8 *bss_bssid, 1261 u8 *nontransmitted_profile) 1262 { 1263 const struct element *elem, *sub; 1264 size_t profile_len = 0; 1265 bool found = false; 1266 1267 if (!bss_bssid || !transmitter_bssid) 1268 return profile_len; 1269 1270 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1271 if (elem->datalen < 2) 1272 continue; 1273 1274 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1275 u8 new_bssid[ETH_ALEN]; 1276 const u8 *index; 1277 1278 if (sub->id != 0 || sub->datalen < 4) { 1279 /* not a valid BSS profile */ 1280 continue; 1281 } 1282 1283 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1284 sub->data[1] != 2) { 1285 /* The first element of the 1286 * Nontransmitted BSSID Profile is not 1287 * the Nontransmitted BSSID Capability 1288 * element. 1289 */ 1290 continue; 1291 } 1292 1293 memset(nontransmitted_profile, 0, len); 1294 profile_len = cfg80211_merge_profile(start, len, 1295 elem, 1296 sub, 1297 nontransmitted_profile, 1298 len); 1299 1300 /* found a Nontransmitted BSSID Profile */ 1301 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1302 nontransmitted_profile, 1303 profile_len); 1304 if (!index || index[1] < 1 || index[2] == 0) { 1305 /* Invalid MBSSID Index element */ 1306 continue; 1307 } 1308 1309 cfg80211_gen_new_bssid(transmitter_bssid, 1310 elem->data[0], 1311 index[2], 1312 new_bssid); 1313 if (ether_addr_equal(new_bssid, bss_bssid)) { 1314 found = true; 1315 elems->bssid_index_len = index[1]; 1316 elems->bssid_index = (void *)&index[2]; 1317 break; 1318 } 1319 } 1320 } 1321 1322 return found ? profile_len : 0; 1323 } 1324 1325 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 1326 struct ieee802_11_elems *elems, 1327 u64 filter, u32 crc, u8 *transmitter_bssid, 1328 u8 *bss_bssid) 1329 { 1330 const struct element *non_inherit = NULL; 1331 u8 *nontransmitted_profile; 1332 int nontransmitted_profile_len = 0; 1333 1334 memset(elems, 0, sizeof(*elems)); 1335 elems->ie_start = start; 1336 elems->total_len = len; 1337 1338 nontransmitted_profile = kmalloc(len, GFP_ATOMIC); 1339 if (nontransmitted_profile) { 1340 nontransmitted_profile_len = 1341 ieee802_11_find_bssid_profile(start, len, elems, 1342 transmitter_bssid, 1343 bss_bssid, 1344 nontransmitted_profile); 1345 non_inherit = 1346 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1347 nontransmitted_profile, 1348 nontransmitted_profile_len); 1349 } 1350 1351 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, 1352 crc, non_inherit); 1353 1354 /* Override with nontransmitted profile, if found */ 1355 if (nontransmitted_profile_len) 1356 _ieee802_11_parse_elems_crc(nontransmitted_profile, 1357 nontransmitted_profile_len, 1358 action, elems, 0, 0, NULL); 1359 1360 if (elems->tim && !elems->parse_error) { 1361 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1362 1363 elems->dtim_period = tim_ie->dtim_period; 1364 elems->dtim_count = tim_ie->dtim_count; 1365 } 1366 1367 /* Override DTIM period and count if needed */ 1368 if (elems->bssid_index && 1369 elems->bssid_index_len >= 1370 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1371 elems->dtim_period = elems->bssid_index->dtim_period; 1372 1373 if (elems->bssid_index && 1374 elems->bssid_index_len >= 1375 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1376 elems->dtim_count = elems->bssid_index->dtim_count; 1377 1378 kfree(nontransmitted_profile); 1379 1380 return crc; 1381 } 1382 1383 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1384 struct ieee80211_tx_queue_params 1385 *qparam, int ac) 1386 { 1387 struct ieee80211_chanctx_conf *chanctx_conf; 1388 const struct ieee80211_reg_rule *rrule; 1389 const struct ieee80211_wmm_ac *wmm_ac; 1390 u16 center_freq = 0; 1391 1392 if (sdata->vif.type != NL80211_IFTYPE_AP && 1393 sdata->vif.type != NL80211_IFTYPE_STATION) 1394 return; 1395 1396 rcu_read_lock(); 1397 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1398 if (chanctx_conf) 1399 center_freq = chanctx_conf->def.chan->center_freq; 1400 1401 if (!center_freq) { 1402 rcu_read_unlock(); 1403 return; 1404 } 1405 1406 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1407 1408 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1409 rcu_read_unlock(); 1410 return; 1411 } 1412 1413 if (sdata->vif.type == NL80211_IFTYPE_AP) 1414 wmm_ac = &rrule->wmm_rule.ap[ac]; 1415 else 1416 wmm_ac = &rrule->wmm_rule.client[ac]; 1417 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1418 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1419 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1420 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1421 rcu_read_unlock(); 1422 } 1423 1424 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1425 bool bss_notify, bool enable_qos) 1426 { 1427 struct ieee80211_local *local = sdata->local; 1428 struct ieee80211_tx_queue_params qparam; 1429 struct ieee80211_chanctx_conf *chanctx_conf; 1430 int ac; 1431 bool use_11b; 1432 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1433 int aCWmin, aCWmax; 1434 1435 if (!local->ops->conf_tx) 1436 return; 1437 1438 if (local->hw.queues < IEEE80211_NUM_ACS) 1439 return; 1440 1441 memset(&qparam, 0, sizeof(qparam)); 1442 1443 rcu_read_lock(); 1444 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1445 use_11b = (chanctx_conf && 1446 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1447 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1448 rcu_read_unlock(); 1449 1450 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1451 1452 /* Set defaults according to 802.11-2007 Table 7-37 */ 1453 aCWmax = 1023; 1454 if (use_11b) 1455 aCWmin = 31; 1456 else 1457 aCWmin = 15; 1458 1459 /* Confiure old 802.11b/g medium access rules. */ 1460 qparam.cw_max = aCWmax; 1461 qparam.cw_min = aCWmin; 1462 qparam.txop = 0; 1463 qparam.aifs = 2; 1464 1465 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1466 /* Update if QoS is enabled. */ 1467 if (enable_qos) { 1468 switch (ac) { 1469 case IEEE80211_AC_BK: 1470 qparam.cw_max = aCWmax; 1471 qparam.cw_min = aCWmin; 1472 qparam.txop = 0; 1473 if (is_ocb) 1474 qparam.aifs = 9; 1475 else 1476 qparam.aifs = 7; 1477 break; 1478 /* never happens but let's not leave undefined */ 1479 default: 1480 case IEEE80211_AC_BE: 1481 qparam.cw_max = aCWmax; 1482 qparam.cw_min = aCWmin; 1483 qparam.txop = 0; 1484 if (is_ocb) 1485 qparam.aifs = 6; 1486 else 1487 qparam.aifs = 3; 1488 break; 1489 case IEEE80211_AC_VI: 1490 qparam.cw_max = aCWmin; 1491 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1492 if (is_ocb) 1493 qparam.txop = 0; 1494 else if (use_11b) 1495 qparam.txop = 6016/32; 1496 else 1497 qparam.txop = 3008/32; 1498 1499 if (is_ocb) 1500 qparam.aifs = 3; 1501 else 1502 qparam.aifs = 2; 1503 break; 1504 case IEEE80211_AC_VO: 1505 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1506 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1507 if (is_ocb) 1508 qparam.txop = 0; 1509 else if (use_11b) 1510 qparam.txop = 3264/32; 1511 else 1512 qparam.txop = 1504/32; 1513 qparam.aifs = 2; 1514 break; 1515 } 1516 } 1517 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1518 1519 qparam.uapsd = false; 1520 1521 sdata->tx_conf[ac] = qparam; 1522 drv_conf_tx(local, sdata, ac, &qparam); 1523 } 1524 1525 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1526 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1527 sdata->vif.type != NL80211_IFTYPE_NAN) { 1528 sdata->vif.bss_conf.qos = enable_qos; 1529 if (bss_notify) 1530 ieee80211_bss_info_change_notify(sdata, 1531 BSS_CHANGED_QOS); 1532 } 1533 } 1534 1535 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1536 u16 transaction, u16 auth_alg, u16 status, 1537 const u8 *extra, size_t extra_len, const u8 *da, 1538 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1539 u32 tx_flags) 1540 { 1541 struct ieee80211_local *local = sdata->local; 1542 struct sk_buff *skb; 1543 struct ieee80211_mgmt *mgmt; 1544 int err; 1545 1546 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1547 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1548 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1549 if (!skb) 1550 return; 1551 1552 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1553 1554 mgmt = skb_put_zero(skb, 24 + 6); 1555 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1556 IEEE80211_STYPE_AUTH); 1557 memcpy(mgmt->da, da, ETH_ALEN); 1558 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1559 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1560 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1561 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1562 mgmt->u.auth.status_code = cpu_to_le16(status); 1563 if (extra) 1564 skb_put_data(skb, extra, extra_len); 1565 1566 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1567 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1568 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1569 WARN_ON(err); 1570 } 1571 1572 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1573 tx_flags; 1574 ieee80211_tx_skb(sdata, skb); 1575 } 1576 1577 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1578 const u8 *bssid, u16 stype, u16 reason, 1579 bool send_frame, u8 *frame_buf) 1580 { 1581 struct ieee80211_local *local = sdata->local; 1582 struct sk_buff *skb; 1583 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1584 1585 /* build frame */ 1586 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1587 mgmt->duration = 0; /* initialize only */ 1588 mgmt->seq_ctrl = 0; /* initialize only */ 1589 memcpy(mgmt->da, bssid, ETH_ALEN); 1590 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1591 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1592 /* u.deauth.reason_code == u.disassoc.reason_code */ 1593 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1594 1595 if (send_frame) { 1596 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1597 IEEE80211_DEAUTH_FRAME_LEN); 1598 if (!skb) 1599 return; 1600 1601 skb_reserve(skb, local->hw.extra_tx_headroom); 1602 1603 /* copy in frame */ 1604 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1605 1606 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1607 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1608 IEEE80211_SKB_CB(skb)->flags |= 1609 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1610 1611 ieee80211_tx_skb(sdata, skb); 1612 } 1613 } 1614 1615 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1616 u8 *buffer, size_t buffer_len, 1617 const u8 *ie, size_t ie_len, 1618 enum nl80211_band band, 1619 u32 rate_mask, 1620 struct cfg80211_chan_def *chandef, 1621 size_t *offset, u32 flags) 1622 { 1623 struct ieee80211_supported_band *sband; 1624 const struct ieee80211_sta_he_cap *he_cap; 1625 u8 *pos = buffer, *end = buffer + buffer_len; 1626 size_t noffset; 1627 int supp_rates_len, i; 1628 u8 rates[32]; 1629 int num_rates; 1630 int ext_rates_len; 1631 int shift; 1632 u32 rate_flags; 1633 bool have_80mhz = false; 1634 1635 *offset = 0; 1636 1637 sband = local->hw.wiphy->bands[band]; 1638 if (WARN_ON_ONCE(!sband)) 1639 return 0; 1640 1641 rate_flags = ieee80211_chandef_rate_flags(chandef); 1642 shift = ieee80211_chandef_get_shift(chandef); 1643 1644 num_rates = 0; 1645 for (i = 0; i < sband->n_bitrates; i++) { 1646 if ((BIT(i) & rate_mask) == 0) 1647 continue; /* skip rate */ 1648 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1649 continue; 1650 1651 rates[num_rates++] = 1652 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1653 (1 << shift) * 5); 1654 } 1655 1656 supp_rates_len = min_t(int, num_rates, 8); 1657 1658 if (end - pos < 2 + supp_rates_len) 1659 goto out_err; 1660 *pos++ = WLAN_EID_SUPP_RATES; 1661 *pos++ = supp_rates_len; 1662 memcpy(pos, rates, supp_rates_len); 1663 pos += supp_rates_len; 1664 1665 /* insert "request information" if in custom IEs */ 1666 if (ie && ie_len) { 1667 static const u8 before_extrates[] = { 1668 WLAN_EID_SSID, 1669 WLAN_EID_SUPP_RATES, 1670 WLAN_EID_REQUEST, 1671 }; 1672 noffset = ieee80211_ie_split(ie, ie_len, 1673 before_extrates, 1674 ARRAY_SIZE(before_extrates), 1675 *offset); 1676 if (end - pos < noffset - *offset) 1677 goto out_err; 1678 memcpy(pos, ie + *offset, noffset - *offset); 1679 pos += noffset - *offset; 1680 *offset = noffset; 1681 } 1682 1683 ext_rates_len = num_rates - supp_rates_len; 1684 if (ext_rates_len > 0) { 1685 if (end - pos < 2 + ext_rates_len) 1686 goto out_err; 1687 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1688 *pos++ = ext_rates_len; 1689 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1690 pos += ext_rates_len; 1691 } 1692 1693 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1694 if (end - pos < 3) 1695 goto out_err; 1696 *pos++ = WLAN_EID_DS_PARAMS; 1697 *pos++ = 1; 1698 *pos++ = ieee80211_frequency_to_channel( 1699 chandef->chan->center_freq); 1700 } 1701 1702 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1703 goto done; 1704 1705 /* insert custom IEs that go before HT */ 1706 if (ie && ie_len) { 1707 static const u8 before_ht[] = { 1708 /* 1709 * no need to list the ones split off already 1710 * (or generated here) 1711 */ 1712 WLAN_EID_DS_PARAMS, 1713 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1714 }; 1715 noffset = ieee80211_ie_split(ie, ie_len, 1716 before_ht, ARRAY_SIZE(before_ht), 1717 *offset); 1718 if (end - pos < noffset - *offset) 1719 goto out_err; 1720 memcpy(pos, ie + *offset, noffset - *offset); 1721 pos += noffset - *offset; 1722 *offset = noffset; 1723 } 1724 1725 if (sband->ht_cap.ht_supported) { 1726 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1727 goto out_err; 1728 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1729 sband->ht_cap.cap); 1730 } 1731 1732 /* insert custom IEs that go before VHT */ 1733 if (ie && ie_len) { 1734 static const u8 before_vht[] = { 1735 /* 1736 * no need to list the ones split off already 1737 * (or generated here) 1738 */ 1739 WLAN_EID_BSS_COEX_2040, 1740 WLAN_EID_EXT_CAPABILITY, 1741 WLAN_EID_SSID_LIST, 1742 WLAN_EID_CHANNEL_USAGE, 1743 WLAN_EID_INTERWORKING, 1744 WLAN_EID_MESH_ID, 1745 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1746 }; 1747 noffset = ieee80211_ie_split(ie, ie_len, 1748 before_vht, ARRAY_SIZE(before_vht), 1749 *offset); 1750 if (end - pos < noffset - *offset) 1751 goto out_err; 1752 memcpy(pos, ie + *offset, noffset - *offset); 1753 pos += noffset - *offset; 1754 *offset = noffset; 1755 } 1756 1757 /* Check if any channel in this sband supports at least 80 MHz */ 1758 for (i = 0; i < sband->n_channels; i++) { 1759 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1760 IEEE80211_CHAN_NO_80MHZ)) 1761 continue; 1762 1763 have_80mhz = true; 1764 break; 1765 } 1766 1767 if (sband->vht_cap.vht_supported && have_80mhz) { 1768 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1769 goto out_err; 1770 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1771 sband->vht_cap.cap); 1772 } 1773 1774 /* insert custom IEs that go before HE */ 1775 if (ie && ie_len) { 1776 static const u8 before_he[] = { 1777 /* 1778 * no need to list the ones split off before VHT 1779 * or generated here 1780 */ 1781 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1782 WLAN_EID_AP_CSN, 1783 /* TODO: add 11ah/11aj/11ak elements */ 1784 }; 1785 noffset = ieee80211_ie_split(ie, ie_len, 1786 before_he, ARRAY_SIZE(before_he), 1787 *offset); 1788 if (end - pos < noffset - *offset) 1789 goto out_err; 1790 memcpy(pos, ie + *offset, noffset - *offset); 1791 pos += noffset - *offset; 1792 *offset = noffset; 1793 } 1794 1795 he_cap = ieee80211_get_he_sta_cap(sband); 1796 if (he_cap) { 1797 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1798 if (!pos) 1799 goto out_err; 1800 } 1801 1802 /* 1803 * If adding more here, adjust code in main.c 1804 * that calculates local->scan_ies_len. 1805 */ 1806 1807 return pos - buffer; 1808 out_err: 1809 WARN_ONCE(1, "not enough space for preq IEs\n"); 1810 done: 1811 return pos - buffer; 1812 } 1813 1814 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1815 size_t buffer_len, 1816 struct ieee80211_scan_ies *ie_desc, 1817 const u8 *ie, size_t ie_len, 1818 u8 bands_used, u32 *rate_masks, 1819 struct cfg80211_chan_def *chandef, 1820 u32 flags) 1821 { 1822 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1823 int i; 1824 1825 memset(ie_desc, 0, sizeof(*ie_desc)); 1826 1827 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1828 if (bands_used & BIT(i)) { 1829 pos += ieee80211_build_preq_ies_band(local, 1830 buffer + pos, 1831 buffer_len - pos, 1832 ie, ie_len, i, 1833 rate_masks[i], 1834 chandef, 1835 &custom_ie_offset, 1836 flags); 1837 ie_desc->ies[i] = buffer + old_pos; 1838 ie_desc->len[i] = pos - old_pos; 1839 old_pos = pos; 1840 } 1841 } 1842 1843 /* add any remaining custom IEs */ 1844 if (ie && ie_len) { 1845 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1846 "not enough space for preq custom IEs\n")) 1847 return pos; 1848 memcpy(buffer + pos, ie + custom_ie_offset, 1849 ie_len - custom_ie_offset); 1850 ie_desc->common_ies = buffer + pos; 1851 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1852 pos += ie_len - custom_ie_offset; 1853 } 1854 1855 return pos; 1856 }; 1857 1858 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1859 const u8 *src, const u8 *dst, 1860 u32 ratemask, 1861 struct ieee80211_channel *chan, 1862 const u8 *ssid, size_t ssid_len, 1863 const u8 *ie, size_t ie_len, 1864 u32 flags) 1865 { 1866 struct ieee80211_local *local = sdata->local; 1867 struct cfg80211_chan_def chandef; 1868 struct sk_buff *skb; 1869 struct ieee80211_mgmt *mgmt; 1870 int ies_len; 1871 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1872 struct ieee80211_scan_ies dummy_ie_desc; 1873 1874 /* 1875 * Do not send DS Channel parameter for directed probe requests 1876 * in order to maximize the chance that we get a response. Some 1877 * badly-behaved APs don't respond when this parameter is included. 1878 */ 1879 chandef.width = sdata->vif.bss_conf.chandef.width; 1880 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1881 chandef.chan = NULL; 1882 else 1883 chandef.chan = chan; 1884 1885 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1886 100 + ie_len); 1887 if (!skb) 1888 return NULL; 1889 1890 rate_masks[chan->band] = ratemask; 1891 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1892 skb_tailroom(skb), &dummy_ie_desc, 1893 ie, ie_len, BIT(chan->band), 1894 rate_masks, &chandef, flags); 1895 skb_put(skb, ies_len); 1896 1897 if (dst) { 1898 mgmt = (struct ieee80211_mgmt *) skb->data; 1899 memcpy(mgmt->da, dst, ETH_ALEN); 1900 memcpy(mgmt->bssid, dst, ETH_ALEN); 1901 } 1902 1903 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1904 1905 return skb; 1906 } 1907 1908 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1909 struct ieee802_11_elems *elems, 1910 enum nl80211_band band, u32 *basic_rates) 1911 { 1912 struct ieee80211_supported_band *sband; 1913 size_t num_rates; 1914 u32 supp_rates, rate_flags; 1915 int i, j, shift; 1916 1917 sband = sdata->local->hw.wiphy->bands[band]; 1918 if (WARN_ON(!sband)) 1919 return 1; 1920 1921 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1922 shift = ieee80211_vif_get_shift(&sdata->vif); 1923 1924 num_rates = sband->n_bitrates; 1925 supp_rates = 0; 1926 for (i = 0; i < elems->supp_rates_len + 1927 elems->ext_supp_rates_len; i++) { 1928 u8 rate = 0; 1929 int own_rate; 1930 bool is_basic; 1931 if (i < elems->supp_rates_len) 1932 rate = elems->supp_rates[i]; 1933 else if (elems->ext_supp_rates) 1934 rate = elems->ext_supp_rates 1935 [i - elems->supp_rates_len]; 1936 own_rate = 5 * (rate & 0x7f); 1937 is_basic = !!(rate & 0x80); 1938 1939 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1940 continue; 1941 1942 for (j = 0; j < num_rates; j++) { 1943 int brate; 1944 if ((rate_flags & sband->bitrates[j].flags) 1945 != rate_flags) 1946 continue; 1947 1948 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1949 1 << shift); 1950 1951 if (brate == own_rate) { 1952 supp_rates |= BIT(j); 1953 if (basic_rates && is_basic) 1954 *basic_rates |= BIT(j); 1955 } 1956 } 1957 } 1958 return supp_rates; 1959 } 1960 1961 void ieee80211_stop_device(struct ieee80211_local *local) 1962 { 1963 ieee80211_led_radio(local, false); 1964 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1965 1966 cancel_work_sync(&local->reconfig_filter); 1967 1968 flush_workqueue(local->workqueue); 1969 drv_stop(local); 1970 } 1971 1972 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1973 bool aborted) 1974 { 1975 /* It's possible that we don't handle the scan completion in 1976 * time during suspend, so if it's still marked as completed 1977 * here, queue the work and flush it to clean things up. 1978 * Instead of calling the worker function directly here, we 1979 * really queue it to avoid potential races with other flows 1980 * scheduling the same work. 1981 */ 1982 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1983 /* If coming from reconfiguration failure, abort the scan so 1984 * we don't attempt to continue a partial HW scan - which is 1985 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1986 * completed scan, and a 5 GHz portion is still pending. 1987 */ 1988 if (aborted) 1989 set_bit(SCAN_ABORTED, &local->scanning); 1990 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1991 flush_delayed_work(&local->scan_work); 1992 } 1993 } 1994 1995 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1996 { 1997 struct ieee80211_sub_if_data *sdata; 1998 struct ieee80211_chanctx *ctx; 1999 2000 /* 2001 * We get here if during resume the device can't be restarted properly. 2002 * We might also get here if this happens during HW reset, which is a 2003 * slightly different situation and we need to drop all connections in 2004 * the latter case. 2005 * 2006 * Ask cfg80211 to turn off all interfaces, this will result in more 2007 * warnings but at least we'll then get into a clean stopped state. 2008 */ 2009 2010 local->resuming = false; 2011 local->suspended = false; 2012 local->in_reconfig = false; 2013 2014 ieee80211_flush_completed_scan(local, true); 2015 2016 /* scheduled scan clearly can't be running any more, but tell 2017 * cfg80211 and clear local state 2018 */ 2019 ieee80211_sched_scan_end(local); 2020 2021 list_for_each_entry(sdata, &local->interfaces, list) 2022 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2023 2024 /* Mark channel contexts as not being in the driver any more to avoid 2025 * removing them from the driver during the shutdown process... 2026 */ 2027 mutex_lock(&local->chanctx_mtx); 2028 list_for_each_entry(ctx, &local->chanctx_list, list) 2029 ctx->driver_present = false; 2030 mutex_unlock(&local->chanctx_mtx); 2031 2032 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2033 } 2034 2035 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2036 struct ieee80211_sub_if_data *sdata) 2037 { 2038 struct ieee80211_chanctx_conf *conf; 2039 struct ieee80211_chanctx *ctx; 2040 2041 if (!local->use_chanctx) 2042 return; 2043 2044 mutex_lock(&local->chanctx_mtx); 2045 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2046 lockdep_is_held(&local->chanctx_mtx)); 2047 if (conf) { 2048 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2049 drv_assign_vif_chanctx(local, sdata, ctx); 2050 } 2051 mutex_unlock(&local->chanctx_mtx); 2052 } 2053 2054 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2055 { 2056 struct ieee80211_local *local = sdata->local; 2057 struct sta_info *sta; 2058 2059 /* add STAs back */ 2060 mutex_lock(&local->sta_mtx); 2061 list_for_each_entry(sta, &local->sta_list, list) { 2062 enum ieee80211_sta_state state; 2063 2064 if (!sta->uploaded || sta->sdata != sdata) 2065 continue; 2066 2067 for (state = IEEE80211_STA_NOTEXIST; 2068 state < sta->sta_state; state++) 2069 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2070 state + 1)); 2071 } 2072 mutex_unlock(&local->sta_mtx); 2073 } 2074 2075 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2076 { 2077 struct cfg80211_nan_func *func, **funcs; 2078 int res, id, i = 0; 2079 2080 res = drv_start_nan(sdata->local, sdata, 2081 &sdata->u.nan.conf); 2082 if (WARN_ON(res)) 2083 return res; 2084 2085 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2086 sizeof(*funcs), 2087 GFP_KERNEL); 2088 if (!funcs) 2089 return -ENOMEM; 2090 2091 /* Add all the functions: 2092 * This is a little bit ugly. We need to call a potentially sleeping 2093 * callback for each NAN function, so we can't hold the spinlock. 2094 */ 2095 spin_lock_bh(&sdata->u.nan.func_lock); 2096 2097 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2098 funcs[i++] = func; 2099 2100 spin_unlock_bh(&sdata->u.nan.func_lock); 2101 2102 for (i = 0; funcs[i]; i++) { 2103 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2104 if (WARN_ON(res)) 2105 ieee80211_nan_func_terminated(&sdata->vif, 2106 funcs[i]->instance_id, 2107 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2108 GFP_KERNEL); 2109 } 2110 2111 kfree(funcs); 2112 2113 return 0; 2114 } 2115 2116 int ieee80211_reconfig(struct ieee80211_local *local) 2117 { 2118 struct ieee80211_hw *hw = &local->hw; 2119 struct ieee80211_sub_if_data *sdata; 2120 struct ieee80211_chanctx *ctx; 2121 struct sta_info *sta; 2122 int res, i; 2123 bool reconfig_due_to_wowlan = false; 2124 struct ieee80211_sub_if_data *sched_scan_sdata; 2125 struct cfg80211_sched_scan_request *sched_scan_req; 2126 bool sched_scan_stopped = false; 2127 bool suspended = local->suspended; 2128 2129 /* nothing to do if HW shouldn't run */ 2130 if (!local->open_count) 2131 goto wake_up; 2132 2133 #ifdef CONFIG_PM 2134 if (suspended) 2135 local->resuming = true; 2136 2137 if (local->wowlan) { 2138 /* 2139 * In the wowlan case, both mac80211 and the device 2140 * are functional when the resume op is called, so 2141 * clear local->suspended so the device could operate 2142 * normally (e.g. pass rx frames). 2143 */ 2144 local->suspended = false; 2145 res = drv_resume(local); 2146 local->wowlan = false; 2147 if (res < 0) { 2148 local->resuming = false; 2149 return res; 2150 } 2151 if (res == 0) 2152 goto wake_up; 2153 WARN_ON(res > 1); 2154 /* 2155 * res is 1, which means the driver requested 2156 * to go through a regular reset on wakeup. 2157 * restore local->suspended in this case. 2158 */ 2159 reconfig_due_to_wowlan = true; 2160 local->suspended = true; 2161 } 2162 #endif 2163 2164 /* 2165 * In case of hw_restart during suspend (without wowlan), 2166 * cancel restart work, as we are reconfiguring the device 2167 * anyway. 2168 * Note that restart_work is scheduled on a frozen workqueue, 2169 * so we can't deadlock in this case. 2170 */ 2171 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2172 cancel_work_sync(&local->restart_work); 2173 2174 local->started = false; 2175 2176 /* 2177 * Upon resume hardware can sometimes be goofy due to 2178 * various platform / driver / bus issues, so restarting 2179 * the device may at times not work immediately. Propagate 2180 * the error. 2181 */ 2182 res = drv_start(local); 2183 if (res) { 2184 if (suspended) 2185 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2186 else 2187 WARN(1, "Hardware became unavailable during restart.\n"); 2188 ieee80211_handle_reconfig_failure(local); 2189 return res; 2190 } 2191 2192 /* setup fragmentation threshold */ 2193 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2194 2195 /* setup RTS threshold */ 2196 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2197 2198 /* reset coverage class */ 2199 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2200 2201 ieee80211_led_radio(local, true); 2202 ieee80211_mod_tpt_led_trig(local, 2203 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2204 2205 /* add interfaces */ 2206 sdata = rtnl_dereference(local->monitor_sdata); 2207 if (sdata) { 2208 /* in HW restart it exists already */ 2209 WARN_ON(local->resuming); 2210 res = drv_add_interface(local, sdata); 2211 if (WARN_ON(res)) { 2212 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2213 synchronize_net(); 2214 kfree(sdata); 2215 } 2216 } 2217 2218 list_for_each_entry(sdata, &local->interfaces, list) { 2219 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2220 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2221 ieee80211_sdata_running(sdata)) { 2222 res = drv_add_interface(local, sdata); 2223 if (WARN_ON(res)) 2224 break; 2225 } 2226 } 2227 2228 /* If adding any of the interfaces failed above, roll back and 2229 * report failure. 2230 */ 2231 if (res) { 2232 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2233 list) 2234 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2235 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2236 ieee80211_sdata_running(sdata)) 2237 drv_remove_interface(local, sdata); 2238 ieee80211_handle_reconfig_failure(local); 2239 return res; 2240 } 2241 2242 /* add channel contexts */ 2243 if (local->use_chanctx) { 2244 mutex_lock(&local->chanctx_mtx); 2245 list_for_each_entry(ctx, &local->chanctx_list, list) 2246 if (ctx->replace_state != 2247 IEEE80211_CHANCTX_REPLACES_OTHER) 2248 WARN_ON(drv_add_chanctx(local, ctx)); 2249 mutex_unlock(&local->chanctx_mtx); 2250 2251 sdata = rtnl_dereference(local->monitor_sdata); 2252 if (sdata && ieee80211_sdata_running(sdata)) 2253 ieee80211_assign_chanctx(local, sdata); 2254 } 2255 2256 /* reconfigure hardware */ 2257 ieee80211_hw_config(local, ~0); 2258 2259 ieee80211_configure_filter(local); 2260 2261 /* Finally also reconfigure all the BSS information */ 2262 list_for_each_entry(sdata, &local->interfaces, list) { 2263 u32 changed; 2264 2265 if (!ieee80211_sdata_running(sdata)) 2266 continue; 2267 2268 ieee80211_assign_chanctx(local, sdata); 2269 2270 switch (sdata->vif.type) { 2271 case NL80211_IFTYPE_AP_VLAN: 2272 case NL80211_IFTYPE_MONITOR: 2273 break; 2274 case NL80211_IFTYPE_ADHOC: 2275 if (sdata->vif.bss_conf.ibss_joined) 2276 WARN_ON(drv_join_ibss(local, sdata)); 2277 /* fall through */ 2278 default: 2279 ieee80211_reconfig_stations(sdata); 2280 /* fall through */ 2281 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2282 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2283 drv_conf_tx(local, sdata, i, 2284 &sdata->tx_conf[i]); 2285 break; 2286 } 2287 2288 /* common change flags for all interface types */ 2289 changed = BSS_CHANGED_ERP_CTS_PROT | 2290 BSS_CHANGED_ERP_PREAMBLE | 2291 BSS_CHANGED_ERP_SLOT | 2292 BSS_CHANGED_HT | 2293 BSS_CHANGED_BASIC_RATES | 2294 BSS_CHANGED_BEACON_INT | 2295 BSS_CHANGED_BSSID | 2296 BSS_CHANGED_CQM | 2297 BSS_CHANGED_QOS | 2298 BSS_CHANGED_IDLE | 2299 BSS_CHANGED_TXPOWER | 2300 BSS_CHANGED_MCAST_RATE; 2301 2302 if (sdata->vif.mu_mimo_owner) 2303 changed |= BSS_CHANGED_MU_GROUPS; 2304 2305 switch (sdata->vif.type) { 2306 case NL80211_IFTYPE_STATION: 2307 changed |= BSS_CHANGED_ASSOC | 2308 BSS_CHANGED_ARP_FILTER | 2309 BSS_CHANGED_PS; 2310 2311 /* Re-send beacon info report to the driver */ 2312 if (sdata->u.mgd.have_beacon) 2313 changed |= BSS_CHANGED_BEACON_INFO; 2314 2315 if (sdata->vif.bss_conf.max_idle_period || 2316 sdata->vif.bss_conf.protected_keep_alive) 2317 changed |= BSS_CHANGED_KEEP_ALIVE; 2318 2319 sdata_lock(sdata); 2320 ieee80211_bss_info_change_notify(sdata, changed); 2321 sdata_unlock(sdata); 2322 break; 2323 case NL80211_IFTYPE_OCB: 2324 changed |= BSS_CHANGED_OCB; 2325 ieee80211_bss_info_change_notify(sdata, changed); 2326 break; 2327 case NL80211_IFTYPE_ADHOC: 2328 changed |= BSS_CHANGED_IBSS; 2329 /* fall through */ 2330 case NL80211_IFTYPE_AP: 2331 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2332 2333 if (sdata->vif.bss_conf.ftm_responder == 1 && 2334 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2335 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2336 changed |= BSS_CHANGED_FTM_RESPONDER; 2337 2338 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2339 changed |= BSS_CHANGED_AP_PROBE_RESP; 2340 2341 if (rcu_access_pointer(sdata->u.ap.beacon)) 2342 drv_start_ap(local, sdata); 2343 } 2344 2345 /* fall through */ 2346 case NL80211_IFTYPE_MESH_POINT: 2347 if (sdata->vif.bss_conf.enable_beacon) { 2348 changed |= BSS_CHANGED_BEACON | 2349 BSS_CHANGED_BEACON_ENABLED; 2350 ieee80211_bss_info_change_notify(sdata, changed); 2351 } 2352 break; 2353 case NL80211_IFTYPE_NAN: 2354 res = ieee80211_reconfig_nan(sdata); 2355 if (res < 0) { 2356 ieee80211_handle_reconfig_failure(local); 2357 return res; 2358 } 2359 break; 2360 case NL80211_IFTYPE_WDS: 2361 case NL80211_IFTYPE_AP_VLAN: 2362 case NL80211_IFTYPE_MONITOR: 2363 case NL80211_IFTYPE_P2P_DEVICE: 2364 /* nothing to do */ 2365 break; 2366 case NL80211_IFTYPE_UNSPECIFIED: 2367 case NUM_NL80211_IFTYPES: 2368 case NL80211_IFTYPE_P2P_CLIENT: 2369 case NL80211_IFTYPE_P2P_GO: 2370 WARN_ON(1); 2371 break; 2372 } 2373 } 2374 2375 ieee80211_recalc_ps(local); 2376 2377 /* 2378 * The sta might be in psm against the ap (e.g. because 2379 * this was the state before a hw restart), so we 2380 * explicitly send a null packet in order to make sure 2381 * it'll sync against the ap (and get out of psm). 2382 */ 2383 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2384 list_for_each_entry(sdata, &local->interfaces, list) { 2385 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2386 continue; 2387 if (!sdata->u.mgd.associated) 2388 continue; 2389 2390 ieee80211_send_nullfunc(local, sdata, false); 2391 } 2392 } 2393 2394 /* APs are now beaconing, add back stations */ 2395 mutex_lock(&local->sta_mtx); 2396 list_for_each_entry(sta, &local->sta_list, list) { 2397 enum ieee80211_sta_state state; 2398 2399 if (!sta->uploaded) 2400 continue; 2401 2402 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2403 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2404 continue; 2405 2406 for (state = IEEE80211_STA_NOTEXIST; 2407 state < sta->sta_state; state++) 2408 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2409 state + 1)); 2410 } 2411 mutex_unlock(&local->sta_mtx); 2412 2413 /* add back keys */ 2414 list_for_each_entry(sdata, &local->interfaces, list) 2415 ieee80211_reset_crypto_tx_tailroom(sdata); 2416 2417 list_for_each_entry(sdata, &local->interfaces, list) 2418 if (ieee80211_sdata_running(sdata)) 2419 ieee80211_enable_keys(sdata); 2420 2421 /* Reconfigure sched scan if it was interrupted by FW restart */ 2422 mutex_lock(&local->mtx); 2423 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2424 lockdep_is_held(&local->mtx)); 2425 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2426 lockdep_is_held(&local->mtx)); 2427 if (sched_scan_sdata && sched_scan_req) 2428 /* 2429 * Sched scan stopped, but we don't want to report it. Instead, 2430 * we're trying to reschedule. However, if more than one scan 2431 * plan was set, we cannot reschedule since we don't know which 2432 * scan plan was currently running (and some scan plans may have 2433 * already finished). 2434 */ 2435 if (sched_scan_req->n_scan_plans > 1 || 2436 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2437 sched_scan_req)) { 2438 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2439 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2440 sched_scan_stopped = true; 2441 } 2442 mutex_unlock(&local->mtx); 2443 2444 if (sched_scan_stopped) 2445 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2446 2447 wake_up: 2448 2449 if (local->monitors == local->open_count && local->monitors > 0) 2450 ieee80211_add_virtual_monitor(local); 2451 2452 /* 2453 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2454 * sessions can be established after a resume. 2455 * 2456 * Also tear down aggregation sessions since reconfiguring 2457 * them in a hardware restart scenario is not easily done 2458 * right now, and the hardware will have lost information 2459 * about the sessions, but we and the AP still think they 2460 * are active. This is really a workaround though. 2461 */ 2462 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2463 mutex_lock(&local->sta_mtx); 2464 2465 list_for_each_entry(sta, &local->sta_list, list) { 2466 if (!local->resuming) 2467 ieee80211_sta_tear_down_BA_sessions( 2468 sta, AGG_STOP_LOCAL_REQUEST); 2469 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2470 } 2471 2472 mutex_unlock(&local->sta_mtx); 2473 } 2474 2475 if (local->in_reconfig) { 2476 local->in_reconfig = false; 2477 barrier(); 2478 2479 /* Restart deferred ROCs */ 2480 mutex_lock(&local->mtx); 2481 ieee80211_start_next_roc(local); 2482 mutex_unlock(&local->mtx); 2483 } 2484 2485 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2486 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2487 false); 2488 2489 /* 2490 * If this is for hw restart things are still running. 2491 * We may want to change that later, however. 2492 */ 2493 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2494 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2495 2496 if (!suspended) 2497 return 0; 2498 2499 #ifdef CONFIG_PM 2500 /* first set suspended false, then resuming */ 2501 local->suspended = false; 2502 mb(); 2503 local->resuming = false; 2504 2505 ieee80211_flush_completed_scan(local, false); 2506 2507 if (local->open_count && !reconfig_due_to_wowlan) 2508 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2509 2510 list_for_each_entry(sdata, &local->interfaces, list) { 2511 if (!ieee80211_sdata_running(sdata)) 2512 continue; 2513 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2514 ieee80211_sta_restart(sdata); 2515 } 2516 2517 mod_timer(&local->sta_cleanup, jiffies + 1); 2518 #else 2519 WARN_ON(1); 2520 #endif 2521 2522 return 0; 2523 } 2524 2525 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2526 { 2527 struct ieee80211_sub_if_data *sdata; 2528 struct ieee80211_local *local; 2529 struct ieee80211_key *key; 2530 2531 if (WARN_ON(!vif)) 2532 return; 2533 2534 sdata = vif_to_sdata(vif); 2535 local = sdata->local; 2536 2537 if (WARN_ON(!local->resuming)) 2538 return; 2539 2540 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2541 return; 2542 2543 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2544 2545 mutex_lock(&local->key_mtx); 2546 list_for_each_entry(key, &sdata->key_list, list) 2547 key->flags |= KEY_FLAG_TAINTED; 2548 mutex_unlock(&local->key_mtx); 2549 } 2550 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2551 2552 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2553 { 2554 struct ieee80211_local *local = sdata->local; 2555 struct ieee80211_chanctx_conf *chanctx_conf; 2556 struct ieee80211_chanctx *chanctx; 2557 2558 mutex_lock(&local->chanctx_mtx); 2559 2560 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2561 lockdep_is_held(&local->chanctx_mtx)); 2562 2563 /* 2564 * This function can be called from a work, thus it may be possible 2565 * that the chanctx_conf is removed (due to a disconnection, for 2566 * example). 2567 * So nothing should be done in such case. 2568 */ 2569 if (!chanctx_conf) 2570 goto unlock; 2571 2572 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2573 ieee80211_recalc_smps_chanctx(local, chanctx); 2574 unlock: 2575 mutex_unlock(&local->chanctx_mtx); 2576 } 2577 2578 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2579 { 2580 struct ieee80211_local *local = sdata->local; 2581 struct ieee80211_chanctx_conf *chanctx_conf; 2582 struct ieee80211_chanctx *chanctx; 2583 2584 mutex_lock(&local->chanctx_mtx); 2585 2586 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2587 lockdep_is_held(&local->chanctx_mtx)); 2588 2589 if (WARN_ON_ONCE(!chanctx_conf)) 2590 goto unlock; 2591 2592 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2593 ieee80211_recalc_chanctx_min_def(local, chanctx); 2594 unlock: 2595 mutex_unlock(&local->chanctx_mtx); 2596 } 2597 2598 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2599 { 2600 size_t pos = offset; 2601 2602 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2603 pos += 2 + ies[pos + 1]; 2604 2605 return pos; 2606 } 2607 2608 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2609 int rssi_min_thold, 2610 int rssi_max_thold) 2611 { 2612 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2613 2614 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2615 return; 2616 2617 /* 2618 * Scale up threshold values before storing it, as the RSSI averaging 2619 * algorithm uses a scaled up value as well. Change this scaling 2620 * factor if the RSSI averaging algorithm changes. 2621 */ 2622 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2623 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2624 } 2625 2626 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2627 int rssi_min_thold, 2628 int rssi_max_thold) 2629 { 2630 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2631 2632 WARN_ON(rssi_min_thold == rssi_max_thold || 2633 rssi_min_thold > rssi_max_thold); 2634 2635 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2636 rssi_max_thold); 2637 } 2638 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2639 2640 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2641 { 2642 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2643 2644 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2645 } 2646 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2647 2648 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2649 u16 cap) 2650 { 2651 __le16 tmp; 2652 2653 *pos++ = WLAN_EID_HT_CAPABILITY; 2654 *pos++ = sizeof(struct ieee80211_ht_cap); 2655 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2656 2657 /* capability flags */ 2658 tmp = cpu_to_le16(cap); 2659 memcpy(pos, &tmp, sizeof(u16)); 2660 pos += sizeof(u16); 2661 2662 /* AMPDU parameters */ 2663 *pos++ = ht_cap->ampdu_factor | 2664 (ht_cap->ampdu_density << 2665 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2666 2667 /* MCS set */ 2668 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2669 pos += sizeof(ht_cap->mcs); 2670 2671 /* extended capabilities */ 2672 pos += sizeof(__le16); 2673 2674 /* BF capabilities */ 2675 pos += sizeof(__le32); 2676 2677 /* antenna selection */ 2678 pos += sizeof(u8); 2679 2680 return pos; 2681 } 2682 2683 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2684 u32 cap) 2685 { 2686 __le32 tmp; 2687 2688 *pos++ = WLAN_EID_VHT_CAPABILITY; 2689 *pos++ = sizeof(struct ieee80211_vht_cap); 2690 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2691 2692 /* capability flags */ 2693 tmp = cpu_to_le32(cap); 2694 memcpy(pos, &tmp, sizeof(u32)); 2695 pos += sizeof(u32); 2696 2697 /* VHT MCS set */ 2698 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2699 pos += sizeof(vht_cap->vht_mcs); 2700 2701 return pos; 2702 } 2703 2704 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2705 const struct ieee80211_sta_he_cap *he_cap, 2706 u8 *end) 2707 { 2708 u8 n; 2709 u8 ie_len; 2710 u8 *orig_pos = pos; 2711 2712 /* Make sure we have place for the IE */ 2713 /* 2714 * TODO: the 1 added is because this temporarily is under the EXTENSION 2715 * IE. Get rid of it when it moves. 2716 */ 2717 if (!he_cap) 2718 return orig_pos; 2719 2720 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2721 ie_len = 2 + 1 + 2722 sizeof(he_cap->he_cap_elem) + n + 2723 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2724 he_cap->he_cap_elem.phy_cap_info); 2725 2726 if ((end - pos) < ie_len) 2727 return orig_pos; 2728 2729 *pos++ = WLAN_EID_EXTENSION; 2730 pos++; /* We'll set the size later below */ 2731 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2732 2733 /* Fixed data */ 2734 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2735 pos += sizeof(he_cap->he_cap_elem); 2736 2737 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2738 pos += n; 2739 2740 /* Check if PPE Threshold should be present */ 2741 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2742 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2743 goto end; 2744 2745 /* 2746 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2747 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2748 */ 2749 n = hweight8(he_cap->ppe_thres[0] & 2750 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2751 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2752 IEEE80211_PPE_THRES_NSS_POS)); 2753 2754 /* 2755 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2756 * total size. 2757 */ 2758 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2759 n = DIV_ROUND_UP(n, 8); 2760 2761 /* Copy PPE Thresholds */ 2762 memcpy(pos, &he_cap->ppe_thres, n); 2763 pos += n; 2764 2765 end: 2766 orig_pos[1] = (pos - orig_pos) - 2; 2767 return pos; 2768 } 2769 2770 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2771 const struct cfg80211_chan_def *chandef, 2772 u16 prot_mode, bool rifs_mode) 2773 { 2774 struct ieee80211_ht_operation *ht_oper; 2775 /* Build HT Information */ 2776 *pos++ = WLAN_EID_HT_OPERATION; 2777 *pos++ = sizeof(struct ieee80211_ht_operation); 2778 ht_oper = (struct ieee80211_ht_operation *)pos; 2779 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2780 chandef->chan->center_freq); 2781 switch (chandef->width) { 2782 case NL80211_CHAN_WIDTH_160: 2783 case NL80211_CHAN_WIDTH_80P80: 2784 case NL80211_CHAN_WIDTH_80: 2785 case NL80211_CHAN_WIDTH_40: 2786 if (chandef->center_freq1 > chandef->chan->center_freq) 2787 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2788 else 2789 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2790 break; 2791 default: 2792 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2793 break; 2794 } 2795 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2796 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2797 chandef->width != NL80211_CHAN_WIDTH_20) 2798 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2799 2800 if (rifs_mode) 2801 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2802 2803 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2804 ht_oper->stbc_param = 0x0000; 2805 2806 /* It seems that Basic MCS set and Supported MCS set 2807 are identical for the first 10 bytes */ 2808 memset(&ht_oper->basic_set, 0, 16); 2809 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2810 2811 return pos + sizeof(struct ieee80211_ht_operation); 2812 } 2813 2814 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2815 const struct cfg80211_chan_def *chandef) 2816 { 2817 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2818 *pos++ = 3; /* IE length */ 2819 /* New channel width */ 2820 switch (chandef->width) { 2821 case NL80211_CHAN_WIDTH_80: 2822 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2823 break; 2824 case NL80211_CHAN_WIDTH_160: 2825 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2826 break; 2827 case NL80211_CHAN_WIDTH_80P80: 2828 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2829 break; 2830 default: 2831 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2832 } 2833 2834 /* new center frequency segment 0 */ 2835 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2836 /* new center frequency segment 1 */ 2837 if (chandef->center_freq2) 2838 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2839 else 2840 *pos++ = 0; 2841 } 2842 2843 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2844 const struct cfg80211_chan_def *chandef) 2845 { 2846 struct ieee80211_vht_operation *vht_oper; 2847 2848 *pos++ = WLAN_EID_VHT_OPERATION; 2849 *pos++ = sizeof(struct ieee80211_vht_operation); 2850 vht_oper = (struct ieee80211_vht_operation *)pos; 2851 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2852 chandef->center_freq1); 2853 if (chandef->center_freq2) 2854 vht_oper->center_freq_seg1_idx = 2855 ieee80211_frequency_to_channel(chandef->center_freq2); 2856 else 2857 vht_oper->center_freq_seg1_idx = 0x00; 2858 2859 switch (chandef->width) { 2860 case NL80211_CHAN_WIDTH_160: 2861 /* 2862 * Convert 160 MHz channel width to new style as interop 2863 * workaround. 2864 */ 2865 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2866 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2867 if (chandef->chan->center_freq < chandef->center_freq1) 2868 vht_oper->center_freq_seg0_idx -= 8; 2869 else 2870 vht_oper->center_freq_seg0_idx += 8; 2871 break; 2872 case NL80211_CHAN_WIDTH_80P80: 2873 /* 2874 * Convert 80+80 MHz channel width to new style as interop 2875 * workaround. 2876 */ 2877 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2878 break; 2879 case NL80211_CHAN_WIDTH_80: 2880 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2881 break; 2882 default: 2883 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2884 break; 2885 } 2886 2887 /* don't require special VHT peer rates */ 2888 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2889 2890 return pos + sizeof(struct ieee80211_vht_operation); 2891 } 2892 2893 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2894 struct cfg80211_chan_def *chandef) 2895 { 2896 enum nl80211_channel_type channel_type; 2897 2898 if (!ht_oper) 2899 return false; 2900 2901 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2902 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2903 channel_type = NL80211_CHAN_HT20; 2904 break; 2905 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2906 channel_type = NL80211_CHAN_HT40PLUS; 2907 break; 2908 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2909 channel_type = NL80211_CHAN_HT40MINUS; 2910 break; 2911 default: 2912 channel_type = NL80211_CHAN_NO_HT; 2913 return false; 2914 } 2915 2916 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2917 return true; 2918 } 2919 2920 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, 2921 const struct ieee80211_vht_operation *oper, 2922 const struct ieee80211_ht_operation *htop, 2923 struct cfg80211_chan_def *chandef) 2924 { 2925 struct cfg80211_chan_def new = *chandef; 2926 int cf0, cf1; 2927 int ccfs0, ccfs1, ccfs2; 2928 int ccf0, ccf1; 2929 2930 if (!oper || !htop) 2931 return false; 2932 2933 ccfs0 = oper->center_freq_seg0_idx; 2934 ccfs1 = oper->center_freq_seg1_idx; 2935 ccfs2 = (le16_to_cpu(htop->operation_mode) & 2936 IEEE80211_HT_OP_MODE_CCFS2_MASK) 2937 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 2938 2939 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */ 2940 ccf0 = ccfs0; 2941 ccf1 = ccfs1; 2942 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 2943 ccf1 = ccfs2; 2944 2945 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 2946 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 2947 2948 switch (oper->chan_width) { 2949 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2950 /* just use HT information directly */ 2951 break; 2952 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2953 new.width = NL80211_CHAN_WIDTH_80; 2954 new.center_freq1 = cf0; 2955 /* If needed, adjust based on the newer interop workaround. */ 2956 if (ccf1) { 2957 unsigned int diff; 2958 2959 diff = abs(ccf1 - ccf0); 2960 if (diff == 8) { 2961 new.width = NL80211_CHAN_WIDTH_160; 2962 new.center_freq1 = cf1; 2963 } else if (diff > 8) { 2964 new.width = NL80211_CHAN_WIDTH_80P80; 2965 new.center_freq2 = cf1; 2966 } 2967 } 2968 break; 2969 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2970 /* deprecated encoding */ 2971 new.width = NL80211_CHAN_WIDTH_160; 2972 new.center_freq1 = cf0; 2973 break; 2974 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2975 /* deprecated encoding */ 2976 new.width = NL80211_CHAN_WIDTH_80P80; 2977 new.center_freq1 = cf0; 2978 new.center_freq2 = cf1; 2979 break; 2980 default: 2981 return false; 2982 } 2983 2984 if (!cfg80211_chandef_valid(&new)) 2985 return false; 2986 2987 *chandef = new; 2988 return true; 2989 } 2990 2991 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2992 const struct ieee80211_supported_band *sband, 2993 const u8 *srates, int srates_len, u32 *rates) 2994 { 2995 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2996 int shift = ieee80211_chandef_get_shift(chandef); 2997 struct ieee80211_rate *br; 2998 int brate, rate, i, j, count = 0; 2999 3000 *rates = 0; 3001 3002 for (i = 0; i < srates_len; i++) { 3003 rate = srates[i] & 0x7f; 3004 3005 for (j = 0; j < sband->n_bitrates; j++) { 3006 br = &sband->bitrates[j]; 3007 if ((rate_flags & br->flags) != rate_flags) 3008 continue; 3009 3010 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3011 if (brate == rate) { 3012 *rates |= BIT(j); 3013 count++; 3014 break; 3015 } 3016 } 3017 } 3018 return count; 3019 } 3020 3021 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3022 struct sk_buff *skb, bool need_basic, 3023 enum nl80211_band band) 3024 { 3025 struct ieee80211_local *local = sdata->local; 3026 struct ieee80211_supported_band *sband; 3027 int rate, shift; 3028 u8 i, rates, *pos; 3029 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3030 u32 rate_flags; 3031 3032 shift = ieee80211_vif_get_shift(&sdata->vif); 3033 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3034 sband = local->hw.wiphy->bands[band]; 3035 rates = 0; 3036 for (i = 0; i < sband->n_bitrates; i++) { 3037 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3038 continue; 3039 rates++; 3040 } 3041 if (rates > 8) 3042 rates = 8; 3043 3044 if (skb_tailroom(skb) < rates + 2) 3045 return -ENOMEM; 3046 3047 pos = skb_put(skb, rates + 2); 3048 *pos++ = WLAN_EID_SUPP_RATES; 3049 *pos++ = rates; 3050 for (i = 0; i < rates; i++) { 3051 u8 basic = 0; 3052 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3053 continue; 3054 3055 if (need_basic && basic_rates & BIT(i)) 3056 basic = 0x80; 3057 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3058 5 * (1 << shift)); 3059 *pos++ = basic | (u8) rate; 3060 } 3061 3062 return 0; 3063 } 3064 3065 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3066 struct sk_buff *skb, bool need_basic, 3067 enum nl80211_band band) 3068 { 3069 struct ieee80211_local *local = sdata->local; 3070 struct ieee80211_supported_band *sband; 3071 int rate, shift; 3072 u8 i, exrates, *pos; 3073 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3074 u32 rate_flags; 3075 3076 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3077 shift = ieee80211_vif_get_shift(&sdata->vif); 3078 3079 sband = local->hw.wiphy->bands[band]; 3080 exrates = 0; 3081 for (i = 0; i < sband->n_bitrates; i++) { 3082 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3083 continue; 3084 exrates++; 3085 } 3086 3087 if (exrates > 8) 3088 exrates -= 8; 3089 else 3090 exrates = 0; 3091 3092 if (skb_tailroom(skb) < exrates + 2) 3093 return -ENOMEM; 3094 3095 if (exrates) { 3096 pos = skb_put(skb, exrates + 2); 3097 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3098 *pos++ = exrates; 3099 for (i = 8; i < sband->n_bitrates; i++) { 3100 u8 basic = 0; 3101 if ((rate_flags & sband->bitrates[i].flags) 3102 != rate_flags) 3103 continue; 3104 if (need_basic && basic_rates & BIT(i)) 3105 basic = 0x80; 3106 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3107 5 * (1 << shift)); 3108 *pos++ = basic | (u8) rate; 3109 } 3110 } 3111 return 0; 3112 } 3113 3114 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3115 { 3116 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3118 3119 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 3120 /* non-managed type inferfaces */ 3121 return 0; 3122 } 3123 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3124 } 3125 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3126 3127 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3128 { 3129 if (!mcs) 3130 return 1; 3131 3132 /* TODO: consider rx_highest */ 3133 3134 if (mcs->rx_mask[3]) 3135 return 4; 3136 if (mcs->rx_mask[2]) 3137 return 3; 3138 if (mcs->rx_mask[1]) 3139 return 2; 3140 return 1; 3141 } 3142 3143 /** 3144 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3145 * @local: mac80211 hw info struct 3146 * @status: RX status 3147 * @mpdu_len: total MPDU length (including FCS) 3148 * @mpdu_offset: offset into MPDU to calculate timestamp at 3149 * 3150 * This function calculates the RX timestamp at the given MPDU offset, taking 3151 * into account what the RX timestamp was. An offset of 0 will just normalize 3152 * the timestamp to TSF at beginning of MPDU reception. 3153 */ 3154 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3155 struct ieee80211_rx_status *status, 3156 unsigned int mpdu_len, 3157 unsigned int mpdu_offset) 3158 { 3159 u64 ts = status->mactime; 3160 struct rate_info ri; 3161 u16 rate; 3162 3163 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3164 return 0; 3165 3166 memset(&ri, 0, sizeof(ri)); 3167 3168 ri.bw = status->bw; 3169 3170 /* Fill cfg80211 rate info */ 3171 switch (status->encoding) { 3172 case RX_ENC_HT: 3173 ri.mcs = status->rate_idx; 3174 ri.flags |= RATE_INFO_FLAGS_MCS; 3175 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3176 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3177 break; 3178 case RX_ENC_VHT: 3179 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3180 ri.mcs = status->rate_idx; 3181 ri.nss = status->nss; 3182 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3183 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3184 break; 3185 default: 3186 WARN_ON(1); 3187 /* fall through */ 3188 case RX_ENC_LEGACY: { 3189 struct ieee80211_supported_band *sband; 3190 int shift = 0; 3191 int bitrate; 3192 3193 switch (status->bw) { 3194 case RATE_INFO_BW_10: 3195 shift = 1; 3196 break; 3197 case RATE_INFO_BW_5: 3198 shift = 2; 3199 break; 3200 } 3201 3202 sband = local->hw.wiphy->bands[status->band]; 3203 bitrate = sband->bitrates[status->rate_idx].bitrate; 3204 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3205 3206 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3207 /* TODO: handle HT/VHT preambles */ 3208 if (status->band == NL80211_BAND_5GHZ) { 3209 ts += 20 << shift; 3210 mpdu_offset += 2; 3211 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3212 ts += 96; 3213 } else { 3214 ts += 192; 3215 } 3216 } 3217 break; 3218 } 3219 } 3220 3221 rate = cfg80211_calculate_bitrate(&ri); 3222 if (WARN_ONCE(!rate, 3223 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3224 (unsigned long long)status->flag, status->rate_idx, 3225 status->nss)) 3226 return 0; 3227 3228 /* rewind from end of MPDU */ 3229 if (status->flag & RX_FLAG_MACTIME_END) 3230 ts -= mpdu_len * 8 * 10 / rate; 3231 3232 ts += mpdu_offset * 8 * 10 / rate; 3233 3234 return ts; 3235 } 3236 3237 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3238 { 3239 struct ieee80211_sub_if_data *sdata; 3240 struct cfg80211_chan_def chandef; 3241 3242 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3243 ASSERT_RTNL(); 3244 3245 mutex_lock(&local->mtx); 3246 list_for_each_entry(sdata, &local->interfaces, list) { 3247 /* it might be waiting for the local->mtx, but then 3248 * by the time it gets it, sdata->wdev.cac_started 3249 * will no longer be true 3250 */ 3251 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3252 3253 if (sdata->wdev.cac_started) { 3254 chandef = sdata->vif.bss_conf.chandef; 3255 ieee80211_vif_release_channel(sdata); 3256 cfg80211_cac_event(sdata->dev, 3257 &chandef, 3258 NL80211_RADAR_CAC_ABORTED, 3259 GFP_KERNEL); 3260 } 3261 } 3262 mutex_unlock(&local->mtx); 3263 } 3264 3265 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3266 { 3267 struct ieee80211_local *local = 3268 container_of(work, struct ieee80211_local, radar_detected_work); 3269 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3270 struct ieee80211_chanctx *ctx; 3271 int num_chanctx = 0; 3272 3273 mutex_lock(&local->chanctx_mtx); 3274 list_for_each_entry(ctx, &local->chanctx_list, list) { 3275 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3276 continue; 3277 3278 num_chanctx++; 3279 chandef = ctx->conf.def; 3280 } 3281 mutex_unlock(&local->chanctx_mtx); 3282 3283 rtnl_lock(); 3284 ieee80211_dfs_cac_cancel(local); 3285 rtnl_unlock(); 3286 3287 if (num_chanctx > 1) 3288 /* XXX: multi-channel is not supported yet */ 3289 WARN_ON(1); 3290 else 3291 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3292 } 3293 3294 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3295 { 3296 struct ieee80211_local *local = hw_to_local(hw); 3297 3298 trace_api_radar_detected(local); 3299 3300 schedule_work(&local->radar_detected_work); 3301 } 3302 EXPORT_SYMBOL(ieee80211_radar_detected); 3303 3304 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3305 { 3306 u32 ret; 3307 int tmp; 3308 3309 switch (c->width) { 3310 case NL80211_CHAN_WIDTH_20: 3311 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3312 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3313 break; 3314 case NL80211_CHAN_WIDTH_40: 3315 c->width = NL80211_CHAN_WIDTH_20; 3316 c->center_freq1 = c->chan->center_freq; 3317 ret = IEEE80211_STA_DISABLE_40MHZ | 3318 IEEE80211_STA_DISABLE_VHT; 3319 break; 3320 case NL80211_CHAN_WIDTH_80: 3321 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3322 /* n_P40 */ 3323 tmp /= 2; 3324 /* freq_P40 */ 3325 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3326 c->width = NL80211_CHAN_WIDTH_40; 3327 ret = IEEE80211_STA_DISABLE_VHT; 3328 break; 3329 case NL80211_CHAN_WIDTH_80P80: 3330 c->center_freq2 = 0; 3331 c->width = NL80211_CHAN_WIDTH_80; 3332 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3333 IEEE80211_STA_DISABLE_160MHZ; 3334 break; 3335 case NL80211_CHAN_WIDTH_160: 3336 /* n_P20 */ 3337 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3338 /* n_P80 */ 3339 tmp /= 4; 3340 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3341 c->width = NL80211_CHAN_WIDTH_80; 3342 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3343 IEEE80211_STA_DISABLE_160MHZ; 3344 break; 3345 default: 3346 case NL80211_CHAN_WIDTH_20_NOHT: 3347 WARN_ON_ONCE(1); 3348 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3349 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3350 break; 3351 case NL80211_CHAN_WIDTH_5: 3352 case NL80211_CHAN_WIDTH_10: 3353 WARN_ON_ONCE(1); 3354 /* keep c->width */ 3355 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3356 break; 3357 } 3358 3359 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3360 3361 return ret; 3362 } 3363 3364 /* 3365 * Returns true if smps_mode_new is strictly more restrictive than 3366 * smps_mode_old. 3367 */ 3368 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3369 enum ieee80211_smps_mode smps_mode_new) 3370 { 3371 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3372 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3373 return false; 3374 3375 switch (smps_mode_old) { 3376 case IEEE80211_SMPS_STATIC: 3377 return false; 3378 case IEEE80211_SMPS_DYNAMIC: 3379 return smps_mode_new == IEEE80211_SMPS_STATIC; 3380 case IEEE80211_SMPS_OFF: 3381 return smps_mode_new != IEEE80211_SMPS_OFF; 3382 default: 3383 WARN_ON(1); 3384 } 3385 3386 return false; 3387 } 3388 3389 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3390 struct cfg80211_csa_settings *csa_settings) 3391 { 3392 struct sk_buff *skb; 3393 struct ieee80211_mgmt *mgmt; 3394 struct ieee80211_local *local = sdata->local; 3395 int freq; 3396 int hdr_len = offsetofend(struct ieee80211_mgmt, 3397 u.action.u.chan_switch); 3398 u8 *pos; 3399 3400 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3401 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3402 return -EOPNOTSUPP; 3403 3404 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3405 5 + /* channel switch announcement element */ 3406 3 + /* secondary channel offset element */ 3407 5 + /* wide bandwidth channel switch announcement */ 3408 8); /* mesh channel switch parameters element */ 3409 if (!skb) 3410 return -ENOMEM; 3411 3412 skb_reserve(skb, local->tx_headroom); 3413 mgmt = skb_put_zero(skb, hdr_len); 3414 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3415 IEEE80211_STYPE_ACTION); 3416 3417 eth_broadcast_addr(mgmt->da); 3418 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3419 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3420 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3421 } else { 3422 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3423 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3424 } 3425 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3426 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3427 pos = skb_put(skb, 5); 3428 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3429 *pos++ = 3; /* IE length */ 3430 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3431 freq = csa_settings->chandef.chan->center_freq; 3432 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3433 *pos++ = csa_settings->count; /* count */ 3434 3435 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3436 enum nl80211_channel_type ch_type; 3437 3438 skb_put(skb, 3); 3439 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3440 *pos++ = 1; /* IE length */ 3441 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3442 if (ch_type == NL80211_CHAN_HT40PLUS) 3443 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3444 else 3445 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3446 } 3447 3448 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3449 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3450 3451 skb_put(skb, 8); 3452 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3453 *pos++ = 6; /* IE length */ 3454 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3455 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3456 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3457 *pos++ |= csa_settings->block_tx ? 3458 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3459 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3460 pos += 2; 3461 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3462 pos += 2; 3463 } 3464 3465 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3466 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3467 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3468 skb_put(skb, 5); 3469 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3470 } 3471 3472 ieee80211_tx_skb(sdata, skb); 3473 return 0; 3474 } 3475 3476 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3477 { 3478 return !(cs == NULL || cs->cipher == 0 || 3479 cs->hdr_len < cs->pn_len + cs->pn_off || 3480 cs->hdr_len <= cs->key_idx_off || 3481 cs->key_idx_shift > 7 || 3482 cs->key_idx_mask == 0); 3483 } 3484 3485 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3486 { 3487 int i; 3488 3489 /* Ensure we have enough iftype bitmap space for all iftype values */ 3490 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3491 3492 for (i = 0; i < n; i++) 3493 if (!ieee80211_cs_valid(&cs[i])) 3494 return false; 3495 3496 return true; 3497 } 3498 3499 const struct ieee80211_cipher_scheme * 3500 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3501 enum nl80211_iftype iftype) 3502 { 3503 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3504 int n = local->hw.n_cipher_schemes; 3505 int i; 3506 const struct ieee80211_cipher_scheme *cs = NULL; 3507 3508 for (i = 0; i < n; i++) { 3509 if (l[i].cipher == cipher) { 3510 cs = &l[i]; 3511 break; 3512 } 3513 } 3514 3515 if (!cs || !(cs->iftype & BIT(iftype))) 3516 return NULL; 3517 3518 return cs; 3519 } 3520 3521 int ieee80211_cs_headroom(struct ieee80211_local *local, 3522 struct cfg80211_crypto_settings *crypto, 3523 enum nl80211_iftype iftype) 3524 { 3525 const struct ieee80211_cipher_scheme *cs; 3526 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3527 int i; 3528 3529 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3530 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3531 iftype); 3532 3533 if (cs && headroom < cs->hdr_len) 3534 headroom = cs->hdr_len; 3535 } 3536 3537 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3538 if (cs && headroom < cs->hdr_len) 3539 headroom = cs->hdr_len; 3540 3541 return headroom; 3542 } 3543 3544 static bool 3545 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3546 { 3547 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3548 int skip; 3549 3550 if (end > 0) 3551 return false; 3552 3553 /* One shot NOA */ 3554 if (data->count[i] == 1) 3555 return false; 3556 3557 if (data->desc[i].interval == 0) 3558 return false; 3559 3560 /* End time is in the past, check for repetitions */ 3561 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3562 if (data->count[i] < 255) { 3563 if (data->count[i] <= skip) { 3564 data->count[i] = 0; 3565 return false; 3566 } 3567 3568 data->count[i] -= skip; 3569 } 3570 3571 data->desc[i].start += skip * data->desc[i].interval; 3572 3573 return true; 3574 } 3575 3576 static bool 3577 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3578 s32 *offset) 3579 { 3580 bool ret = false; 3581 int i; 3582 3583 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3584 s32 cur; 3585 3586 if (!data->count[i]) 3587 continue; 3588 3589 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3590 ret = true; 3591 3592 cur = data->desc[i].start - tsf; 3593 if (cur > *offset) 3594 continue; 3595 3596 cur = data->desc[i].start + data->desc[i].duration - tsf; 3597 if (cur > *offset) 3598 *offset = cur; 3599 } 3600 3601 return ret; 3602 } 3603 3604 static u32 3605 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3606 { 3607 s32 offset = 0; 3608 int tries = 0; 3609 /* 3610 * arbitrary limit, used to avoid infinite loops when combined NoA 3611 * descriptors cover the full time period. 3612 */ 3613 int max_tries = 5; 3614 3615 ieee80211_extend_absent_time(data, tsf, &offset); 3616 do { 3617 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3618 break; 3619 3620 tries++; 3621 } while (tries < max_tries); 3622 3623 return offset; 3624 } 3625 3626 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3627 { 3628 u32 next_offset = BIT(31) - 1; 3629 int i; 3630 3631 data->absent = 0; 3632 data->has_next_tsf = false; 3633 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3634 s32 start; 3635 3636 if (!data->count[i]) 3637 continue; 3638 3639 ieee80211_extend_noa_desc(data, tsf, i); 3640 start = data->desc[i].start - tsf; 3641 if (start <= 0) 3642 data->absent |= BIT(i); 3643 3644 if (next_offset > start) 3645 next_offset = start; 3646 3647 data->has_next_tsf = true; 3648 } 3649 3650 if (data->absent) 3651 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3652 3653 data->next_tsf = tsf + next_offset; 3654 } 3655 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3656 3657 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3658 struct ieee80211_noa_data *data, u32 tsf) 3659 { 3660 int ret = 0; 3661 int i; 3662 3663 memset(data, 0, sizeof(*data)); 3664 3665 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3666 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3667 3668 if (!desc->count || !desc->duration) 3669 continue; 3670 3671 data->count[i] = desc->count; 3672 data->desc[i].start = le32_to_cpu(desc->start_time); 3673 data->desc[i].duration = le32_to_cpu(desc->duration); 3674 data->desc[i].interval = le32_to_cpu(desc->interval); 3675 3676 if (data->count[i] > 1 && 3677 data->desc[i].interval < data->desc[i].duration) 3678 continue; 3679 3680 ieee80211_extend_noa_desc(data, tsf, i); 3681 ret++; 3682 } 3683 3684 if (ret) 3685 ieee80211_update_p2p_noa(data, tsf); 3686 3687 return ret; 3688 } 3689 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3690 3691 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3692 struct ieee80211_sub_if_data *sdata) 3693 { 3694 u64 tsf = drv_get_tsf(local, sdata); 3695 u64 dtim_count = 0; 3696 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3697 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3698 struct ps_data *ps; 3699 u8 bcns_from_dtim; 3700 3701 if (tsf == -1ULL || !beacon_int || !dtim_period) 3702 return; 3703 3704 if (sdata->vif.type == NL80211_IFTYPE_AP || 3705 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3706 if (!sdata->bss) 3707 return; 3708 3709 ps = &sdata->bss->ps; 3710 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3711 ps = &sdata->u.mesh.ps; 3712 } else { 3713 return; 3714 } 3715 3716 /* 3717 * actually finds last dtim_count, mac80211 will update in 3718 * __beacon_add_tim(). 3719 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3720 */ 3721 do_div(tsf, beacon_int); 3722 bcns_from_dtim = do_div(tsf, dtim_period); 3723 /* just had a DTIM */ 3724 if (!bcns_from_dtim) 3725 dtim_count = 0; 3726 else 3727 dtim_count = dtim_period - bcns_from_dtim; 3728 3729 ps->dtim_count = dtim_count; 3730 } 3731 3732 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3733 struct ieee80211_chanctx *ctx) 3734 { 3735 struct ieee80211_sub_if_data *sdata; 3736 u8 radar_detect = 0; 3737 3738 lockdep_assert_held(&local->chanctx_mtx); 3739 3740 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3741 return 0; 3742 3743 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3744 if (sdata->reserved_radar_required) 3745 radar_detect |= BIT(sdata->reserved_chandef.width); 3746 3747 /* 3748 * An in-place reservation context should not have any assigned vifs 3749 * until it replaces the other context. 3750 */ 3751 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3752 !list_empty(&ctx->assigned_vifs)); 3753 3754 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3755 if (sdata->radar_required) 3756 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3757 3758 return radar_detect; 3759 } 3760 3761 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3762 const struct cfg80211_chan_def *chandef, 3763 enum ieee80211_chanctx_mode chanmode, 3764 u8 radar_detect) 3765 { 3766 struct ieee80211_local *local = sdata->local; 3767 struct ieee80211_sub_if_data *sdata_iter; 3768 enum nl80211_iftype iftype = sdata->wdev.iftype; 3769 struct ieee80211_chanctx *ctx; 3770 int total = 1; 3771 struct iface_combination_params params = { 3772 .radar_detect = radar_detect, 3773 }; 3774 3775 lockdep_assert_held(&local->chanctx_mtx); 3776 3777 if (WARN_ON(hweight32(radar_detect) > 1)) 3778 return -EINVAL; 3779 3780 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3781 !chandef->chan)) 3782 return -EINVAL; 3783 3784 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3785 return -EINVAL; 3786 3787 if (sdata->vif.type == NL80211_IFTYPE_AP || 3788 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3789 /* 3790 * always passing this is harmless, since it'll be the 3791 * same value that cfg80211 finds if it finds the same 3792 * interface ... and that's always allowed 3793 */ 3794 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3795 } 3796 3797 /* Always allow software iftypes */ 3798 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3799 if (radar_detect) 3800 return -EINVAL; 3801 return 0; 3802 } 3803 3804 if (chandef) 3805 params.num_different_channels = 1; 3806 3807 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3808 params.iftype_num[iftype] = 1; 3809 3810 list_for_each_entry(ctx, &local->chanctx_list, list) { 3811 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3812 continue; 3813 params.radar_detect |= 3814 ieee80211_chanctx_radar_detect(local, ctx); 3815 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3816 params.num_different_channels++; 3817 continue; 3818 } 3819 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3820 cfg80211_chandef_compatible(chandef, 3821 &ctx->conf.def)) 3822 continue; 3823 params.num_different_channels++; 3824 } 3825 3826 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3827 struct wireless_dev *wdev_iter; 3828 3829 wdev_iter = &sdata_iter->wdev; 3830 3831 if (sdata_iter == sdata || 3832 !ieee80211_sdata_running(sdata_iter) || 3833 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3834 continue; 3835 3836 params.iftype_num[wdev_iter->iftype]++; 3837 total++; 3838 } 3839 3840 if (total == 1 && !params.radar_detect) 3841 return 0; 3842 3843 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3844 } 3845 3846 static void 3847 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3848 void *data) 3849 { 3850 u32 *max_num_different_channels = data; 3851 3852 *max_num_different_channels = max(*max_num_different_channels, 3853 c->num_different_channels); 3854 } 3855 3856 int ieee80211_max_num_channels(struct ieee80211_local *local) 3857 { 3858 struct ieee80211_sub_if_data *sdata; 3859 struct ieee80211_chanctx *ctx; 3860 u32 max_num_different_channels = 1; 3861 int err; 3862 struct iface_combination_params params = {0}; 3863 3864 lockdep_assert_held(&local->chanctx_mtx); 3865 3866 list_for_each_entry(ctx, &local->chanctx_list, list) { 3867 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3868 continue; 3869 3870 params.num_different_channels++; 3871 3872 params.radar_detect |= 3873 ieee80211_chanctx_radar_detect(local, ctx); 3874 } 3875 3876 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3877 params.iftype_num[sdata->wdev.iftype]++; 3878 3879 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3880 ieee80211_iter_max_chans, 3881 &max_num_different_channels); 3882 if (err < 0) 3883 return err; 3884 3885 return max_num_different_channels; 3886 } 3887 3888 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3889 { 3890 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3891 *buf++ = 7; /* len */ 3892 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3893 *buf++ = 0x50; 3894 *buf++ = 0xf2; 3895 *buf++ = 2; /* WME */ 3896 *buf++ = 0; /* WME info */ 3897 *buf++ = 1; /* WME ver */ 3898 *buf++ = qosinfo; /* U-APSD no in use */ 3899 3900 return buf; 3901 } 3902 3903 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3904 unsigned long *frame_cnt, 3905 unsigned long *byte_cnt) 3906 { 3907 struct txq_info *txqi = to_txq_info(txq); 3908 u32 frag_cnt = 0, frag_bytes = 0; 3909 struct sk_buff *skb; 3910 3911 skb_queue_walk(&txqi->frags, skb) { 3912 frag_cnt++; 3913 frag_bytes += skb->len; 3914 } 3915 3916 if (frame_cnt) 3917 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3918 3919 if (byte_cnt) 3920 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3921 } 3922 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3923 3924 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3925 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3926 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3927 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3928 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3929 }; 3930