1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015-2017 Intel Deutschland GmbH 9 * Copyright (C) 2018-2019 Intel Corporation 10 * 11 * utilities for mac80211 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/netdevice.h> 16 #include <linux/export.h> 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/skbuff.h> 20 #include <linux/etherdevice.h> 21 #include <linux/if_arp.h> 22 #include <linux/bitmap.h> 23 #include <linux/crc32.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/rtnetlink.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wme.h" 33 #include "led.h" 34 #include "wep.h" 35 36 /* privid for wiphys to determine whether they belong to us or not */ 37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 38 39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 40 { 41 struct ieee80211_local *local; 42 BUG_ON(!wiphy); 43 44 local = wiphy_priv(wiphy); 45 return &local->hw; 46 } 47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 48 49 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 50 { 51 struct sk_buff *skb; 52 struct ieee80211_hdr *hdr; 53 54 skb_queue_walk(&tx->skbs, skb) { 55 hdr = (struct ieee80211_hdr *) skb->data; 56 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 57 } 58 } 59 60 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 61 int rate, int erp, int short_preamble, 62 int shift) 63 { 64 int dur; 65 66 /* calculate duration (in microseconds, rounded up to next higher 67 * integer if it includes a fractional microsecond) to send frame of 68 * len bytes (does not include FCS) at the given rate. Duration will 69 * also include SIFS. 70 * 71 * rate is in 100 kbps, so divident is multiplied by 10 in the 72 * DIV_ROUND_UP() operations. 73 * 74 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 75 * is assumed to be 0 otherwise. 76 */ 77 78 if (band == NL80211_BAND_5GHZ || erp) { 79 /* 80 * OFDM: 81 * 82 * N_DBPS = DATARATE x 4 83 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 84 * (16 = SIGNAL time, 6 = tail bits) 85 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 86 * 87 * T_SYM = 4 usec 88 * 802.11a - 18.5.2: aSIFSTime = 16 usec 89 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 90 * signal ext = 6 usec 91 */ 92 dur = 16; /* SIFS + signal ext */ 93 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 94 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 95 96 /* IEEE 802.11-2012 18.3.2.4: all values above are: 97 * * times 4 for 5 MHz 98 * * times 2 for 10 MHz 99 */ 100 dur *= 1 << shift; 101 102 /* rates should already consider the channel bandwidth, 103 * don't apply divisor again. 104 */ 105 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 106 4 * rate); /* T_SYM x N_SYM */ 107 } else { 108 /* 109 * 802.11b or 802.11g with 802.11b compatibility: 110 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 111 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 112 * 113 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 114 * aSIFSTime = 10 usec 115 * aPreambleLength = 144 usec or 72 usec with short preamble 116 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 117 */ 118 dur = 10; /* aSIFSTime = 10 usec */ 119 dur += short_preamble ? (72 + 24) : (144 + 48); 120 121 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 122 } 123 124 return dur; 125 } 126 127 /* Exported duration function for driver use */ 128 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 129 struct ieee80211_vif *vif, 130 enum nl80211_band band, 131 size_t frame_len, 132 struct ieee80211_rate *rate) 133 { 134 struct ieee80211_sub_if_data *sdata; 135 u16 dur; 136 int erp, shift = 0; 137 bool short_preamble = false; 138 139 erp = 0; 140 if (vif) { 141 sdata = vif_to_sdata(vif); 142 short_preamble = sdata->vif.bss_conf.use_short_preamble; 143 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 144 erp = rate->flags & IEEE80211_RATE_ERP_G; 145 shift = ieee80211_vif_get_shift(vif); 146 } 147 148 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 149 short_preamble, shift); 150 151 return cpu_to_le16(dur); 152 } 153 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 154 155 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 156 struct ieee80211_vif *vif, size_t frame_len, 157 const struct ieee80211_tx_info *frame_txctl) 158 { 159 struct ieee80211_local *local = hw_to_local(hw); 160 struct ieee80211_rate *rate; 161 struct ieee80211_sub_if_data *sdata; 162 bool short_preamble; 163 int erp, shift = 0, bitrate; 164 u16 dur; 165 struct ieee80211_supported_band *sband; 166 167 sband = local->hw.wiphy->bands[frame_txctl->band]; 168 169 short_preamble = false; 170 171 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 172 173 erp = 0; 174 if (vif) { 175 sdata = vif_to_sdata(vif); 176 short_preamble = sdata->vif.bss_conf.use_short_preamble; 177 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 178 erp = rate->flags & IEEE80211_RATE_ERP_G; 179 shift = ieee80211_vif_get_shift(vif); 180 } 181 182 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 183 184 /* CTS duration */ 185 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 186 erp, short_preamble, shift); 187 /* Data frame duration */ 188 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 189 erp, short_preamble, shift); 190 /* ACK duration */ 191 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 192 erp, short_preamble, shift); 193 194 return cpu_to_le16(dur); 195 } 196 EXPORT_SYMBOL(ieee80211_rts_duration); 197 198 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 199 struct ieee80211_vif *vif, 200 size_t frame_len, 201 const struct ieee80211_tx_info *frame_txctl) 202 { 203 struct ieee80211_local *local = hw_to_local(hw); 204 struct ieee80211_rate *rate; 205 struct ieee80211_sub_if_data *sdata; 206 bool short_preamble; 207 int erp, shift = 0, bitrate; 208 u16 dur; 209 struct ieee80211_supported_band *sband; 210 211 sband = local->hw.wiphy->bands[frame_txctl->band]; 212 213 short_preamble = false; 214 215 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 216 erp = 0; 217 if (vif) { 218 sdata = vif_to_sdata(vif); 219 short_preamble = sdata->vif.bss_conf.use_short_preamble; 220 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 221 erp = rate->flags & IEEE80211_RATE_ERP_G; 222 shift = ieee80211_vif_get_shift(vif); 223 } 224 225 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 226 227 /* Data frame duration */ 228 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 229 erp, short_preamble, shift); 230 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 231 /* ACK duration */ 232 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 233 erp, short_preamble, shift); 234 } 235 236 return cpu_to_le16(dur); 237 } 238 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 239 240 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 241 { 242 struct ieee80211_local *local = sdata->local; 243 struct ieee80211_vif *vif = &sdata->vif; 244 struct fq *fq = &local->fq; 245 struct ps_data *ps = NULL; 246 struct txq_info *txqi; 247 struct sta_info *sta; 248 int i; 249 250 spin_lock_bh(&fq->lock); 251 252 if (sdata->vif.type == NL80211_IFTYPE_AP) 253 ps = &sdata->bss->ps; 254 255 sdata->vif.txqs_stopped[ac] = false; 256 257 list_for_each_entry_rcu(sta, &local->sta_list, list) { 258 if (sdata != sta->sdata) 259 continue; 260 261 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 262 struct ieee80211_txq *txq = sta->sta.txq[i]; 263 264 if (!txq) 265 continue; 266 267 txqi = to_txq_info(txq); 268 269 if (ac != txq->ac) 270 continue; 271 272 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, 273 &txqi->flags)) 274 continue; 275 276 spin_unlock_bh(&fq->lock); 277 drv_wake_tx_queue(local, txqi); 278 spin_lock_bh(&fq->lock); 279 } 280 } 281 282 if (!vif->txq) 283 goto out; 284 285 txqi = to_txq_info(vif->txq); 286 287 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) || 288 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac) 289 goto out; 290 291 spin_unlock_bh(&fq->lock); 292 293 drv_wake_tx_queue(local, txqi); 294 return; 295 out: 296 spin_unlock_bh(&fq->lock); 297 } 298 299 static void 300 __releases(&local->queue_stop_reason_lock) 301 __acquires(&local->queue_stop_reason_lock) 302 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 303 { 304 struct ieee80211_sub_if_data *sdata; 305 int n_acs = IEEE80211_NUM_ACS; 306 int i; 307 308 rcu_read_lock(); 309 310 if (local->hw.queues < IEEE80211_NUM_ACS) 311 n_acs = 1; 312 313 for (i = 0; i < local->hw.queues; i++) { 314 if (local->queue_stop_reasons[i]) 315 continue; 316 317 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 318 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 319 int ac; 320 321 for (ac = 0; ac < n_acs; ac++) { 322 int ac_queue = sdata->vif.hw_queue[ac]; 323 324 if (ac_queue == i || 325 sdata->vif.cab_queue == i) 326 __ieee80211_wake_txqs(sdata, ac); 327 } 328 } 329 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 330 } 331 332 rcu_read_unlock(); 333 } 334 335 void ieee80211_wake_txqs(unsigned long data) 336 { 337 struct ieee80211_local *local = (struct ieee80211_local *)data; 338 unsigned long flags; 339 340 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 341 _ieee80211_wake_txqs(local, &flags); 342 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 343 } 344 345 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 346 { 347 struct ieee80211_sub_if_data *sdata; 348 int n_acs = IEEE80211_NUM_ACS; 349 350 if (local->ops->wake_tx_queue) 351 return; 352 353 if (local->hw.queues < IEEE80211_NUM_ACS) 354 n_acs = 1; 355 356 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 357 int ac; 358 359 if (!sdata->dev) 360 continue; 361 362 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 363 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 364 continue; 365 366 for (ac = 0; ac < n_acs; ac++) { 367 int ac_queue = sdata->vif.hw_queue[ac]; 368 369 if (ac_queue == queue || 370 (sdata->vif.cab_queue == queue && 371 local->queue_stop_reasons[ac_queue] == 0 && 372 skb_queue_empty(&local->pending[ac_queue]))) 373 netif_wake_subqueue(sdata->dev, ac); 374 } 375 } 376 } 377 378 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 379 enum queue_stop_reason reason, 380 bool refcounted, 381 unsigned long *flags) 382 { 383 struct ieee80211_local *local = hw_to_local(hw); 384 385 trace_wake_queue(local, queue, reason); 386 387 if (WARN_ON(queue >= hw->queues)) 388 return; 389 390 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 391 return; 392 393 if (!refcounted) { 394 local->q_stop_reasons[queue][reason] = 0; 395 } else { 396 local->q_stop_reasons[queue][reason]--; 397 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 398 local->q_stop_reasons[queue][reason] = 0; 399 } 400 401 if (local->q_stop_reasons[queue][reason] == 0) 402 __clear_bit(reason, &local->queue_stop_reasons[queue]); 403 404 if (local->queue_stop_reasons[queue] != 0) 405 /* someone still has this queue stopped */ 406 return; 407 408 if (skb_queue_empty(&local->pending[queue])) { 409 rcu_read_lock(); 410 ieee80211_propagate_queue_wake(local, queue); 411 rcu_read_unlock(); 412 } else 413 tasklet_schedule(&local->tx_pending_tasklet); 414 415 /* 416 * Calling _ieee80211_wake_txqs here can be a problem because it may 417 * release queue_stop_reason_lock which has been taken by 418 * __ieee80211_wake_queue's caller. It is certainly not very nice to 419 * release someone's lock, but it is fine because all the callers of 420 * __ieee80211_wake_queue call it right before releasing the lock. 421 */ 422 if (local->ops->wake_tx_queue) { 423 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 424 tasklet_schedule(&local->wake_txqs_tasklet); 425 else 426 _ieee80211_wake_txqs(local, flags); 427 } 428 } 429 430 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 431 enum queue_stop_reason reason, 432 bool refcounted) 433 { 434 struct ieee80211_local *local = hw_to_local(hw); 435 unsigned long flags; 436 437 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 438 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 439 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 440 } 441 442 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 443 { 444 ieee80211_wake_queue_by_reason(hw, queue, 445 IEEE80211_QUEUE_STOP_REASON_DRIVER, 446 false); 447 } 448 EXPORT_SYMBOL(ieee80211_wake_queue); 449 450 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 451 enum queue_stop_reason reason, 452 bool refcounted) 453 { 454 struct ieee80211_local *local = hw_to_local(hw); 455 struct ieee80211_sub_if_data *sdata; 456 int n_acs = IEEE80211_NUM_ACS; 457 458 trace_stop_queue(local, queue, reason); 459 460 if (WARN_ON(queue >= hw->queues)) 461 return; 462 463 if (!refcounted) 464 local->q_stop_reasons[queue][reason] = 1; 465 else 466 local->q_stop_reasons[queue][reason]++; 467 468 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 469 return; 470 471 if (local->hw.queues < IEEE80211_NUM_ACS) 472 n_acs = 1; 473 474 rcu_read_lock(); 475 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 476 int ac; 477 478 if (!sdata->dev) 479 continue; 480 481 for (ac = 0; ac < n_acs; ac++) { 482 if (sdata->vif.hw_queue[ac] == queue || 483 sdata->vif.cab_queue == queue) { 484 if (!local->ops->wake_tx_queue) { 485 netif_stop_subqueue(sdata->dev, ac); 486 continue; 487 } 488 spin_lock(&local->fq.lock); 489 sdata->vif.txqs_stopped[ac] = true; 490 spin_unlock(&local->fq.lock); 491 } 492 } 493 } 494 rcu_read_unlock(); 495 } 496 497 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 498 enum queue_stop_reason reason, 499 bool refcounted) 500 { 501 struct ieee80211_local *local = hw_to_local(hw); 502 unsigned long flags; 503 504 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 505 __ieee80211_stop_queue(hw, queue, reason, refcounted); 506 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 507 } 508 509 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 510 { 511 ieee80211_stop_queue_by_reason(hw, queue, 512 IEEE80211_QUEUE_STOP_REASON_DRIVER, 513 false); 514 } 515 EXPORT_SYMBOL(ieee80211_stop_queue); 516 517 void ieee80211_add_pending_skb(struct ieee80211_local *local, 518 struct sk_buff *skb) 519 { 520 struct ieee80211_hw *hw = &local->hw; 521 unsigned long flags; 522 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 523 int queue = info->hw_queue; 524 525 if (WARN_ON(!info->control.vif)) { 526 ieee80211_free_txskb(&local->hw, skb); 527 return; 528 } 529 530 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 531 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 532 false); 533 __skb_queue_tail(&local->pending[queue], skb); 534 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 535 false, &flags); 536 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 537 } 538 539 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 540 struct sk_buff_head *skbs) 541 { 542 struct ieee80211_hw *hw = &local->hw; 543 struct sk_buff *skb; 544 unsigned long flags; 545 int queue, i; 546 547 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 548 while ((skb = skb_dequeue(skbs))) { 549 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 550 551 if (WARN_ON(!info->control.vif)) { 552 ieee80211_free_txskb(&local->hw, skb); 553 continue; 554 } 555 556 queue = info->hw_queue; 557 558 __ieee80211_stop_queue(hw, queue, 559 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 560 false); 561 562 __skb_queue_tail(&local->pending[queue], skb); 563 } 564 565 for (i = 0; i < hw->queues; i++) 566 __ieee80211_wake_queue(hw, i, 567 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 568 false, &flags); 569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 570 } 571 572 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 573 unsigned long queues, 574 enum queue_stop_reason reason, 575 bool refcounted) 576 { 577 struct ieee80211_local *local = hw_to_local(hw); 578 unsigned long flags; 579 int i; 580 581 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 582 583 for_each_set_bit(i, &queues, hw->queues) 584 __ieee80211_stop_queue(hw, i, reason, refcounted); 585 586 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 587 } 588 589 void ieee80211_stop_queues(struct ieee80211_hw *hw) 590 { 591 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 592 IEEE80211_QUEUE_STOP_REASON_DRIVER, 593 false); 594 } 595 EXPORT_SYMBOL(ieee80211_stop_queues); 596 597 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 598 { 599 struct ieee80211_local *local = hw_to_local(hw); 600 unsigned long flags; 601 int ret; 602 603 if (WARN_ON(queue >= hw->queues)) 604 return true; 605 606 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 607 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 608 &local->queue_stop_reasons[queue]); 609 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 610 return ret; 611 } 612 EXPORT_SYMBOL(ieee80211_queue_stopped); 613 614 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 615 unsigned long queues, 616 enum queue_stop_reason reason, 617 bool refcounted) 618 { 619 struct ieee80211_local *local = hw_to_local(hw); 620 unsigned long flags; 621 int i; 622 623 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 624 625 for_each_set_bit(i, &queues, hw->queues) 626 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 627 628 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 629 } 630 631 void ieee80211_wake_queues(struct ieee80211_hw *hw) 632 { 633 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 634 IEEE80211_QUEUE_STOP_REASON_DRIVER, 635 false); 636 } 637 EXPORT_SYMBOL(ieee80211_wake_queues); 638 639 static unsigned int 640 ieee80211_get_vif_queues(struct ieee80211_local *local, 641 struct ieee80211_sub_if_data *sdata) 642 { 643 unsigned int queues; 644 645 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 646 int ac; 647 648 queues = 0; 649 650 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 651 queues |= BIT(sdata->vif.hw_queue[ac]); 652 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 653 queues |= BIT(sdata->vif.cab_queue); 654 } else { 655 /* all queues */ 656 queues = BIT(local->hw.queues) - 1; 657 } 658 659 return queues; 660 } 661 662 void __ieee80211_flush_queues(struct ieee80211_local *local, 663 struct ieee80211_sub_if_data *sdata, 664 unsigned int queues, bool drop) 665 { 666 if (!local->ops->flush) 667 return; 668 669 /* 670 * If no queue was set, or if the HW doesn't support 671 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 672 */ 673 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 674 queues = ieee80211_get_vif_queues(local, sdata); 675 676 ieee80211_stop_queues_by_reason(&local->hw, queues, 677 IEEE80211_QUEUE_STOP_REASON_FLUSH, 678 false); 679 680 drv_flush(local, sdata, queues, drop); 681 682 ieee80211_wake_queues_by_reason(&local->hw, queues, 683 IEEE80211_QUEUE_STOP_REASON_FLUSH, 684 false); 685 } 686 687 void ieee80211_flush_queues(struct ieee80211_local *local, 688 struct ieee80211_sub_if_data *sdata, bool drop) 689 { 690 __ieee80211_flush_queues(local, sdata, 0, drop); 691 } 692 693 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 694 struct ieee80211_sub_if_data *sdata, 695 enum queue_stop_reason reason) 696 { 697 ieee80211_stop_queues_by_reason(&local->hw, 698 ieee80211_get_vif_queues(local, sdata), 699 reason, true); 700 } 701 702 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 703 struct ieee80211_sub_if_data *sdata, 704 enum queue_stop_reason reason) 705 { 706 ieee80211_wake_queues_by_reason(&local->hw, 707 ieee80211_get_vif_queues(local, sdata), 708 reason, true); 709 } 710 711 static void __iterate_interfaces(struct ieee80211_local *local, 712 u32 iter_flags, 713 void (*iterator)(void *data, u8 *mac, 714 struct ieee80211_vif *vif), 715 void *data) 716 { 717 struct ieee80211_sub_if_data *sdata; 718 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 719 720 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 721 switch (sdata->vif.type) { 722 case NL80211_IFTYPE_MONITOR: 723 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 724 continue; 725 break; 726 case NL80211_IFTYPE_AP_VLAN: 727 continue; 728 default: 729 break; 730 } 731 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 732 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 733 continue; 734 if (ieee80211_sdata_running(sdata) || !active_only) 735 iterator(data, sdata->vif.addr, 736 &sdata->vif); 737 } 738 739 sdata = rcu_dereference_check(local->monitor_sdata, 740 lockdep_is_held(&local->iflist_mtx) || 741 lockdep_rtnl_is_held()); 742 if (sdata && 743 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 744 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 745 iterator(data, sdata->vif.addr, &sdata->vif); 746 } 747 748 void ieee80211_iterate_interfaces( 749 struct ieee80211_hw *hw, u32 iter_flags, 750 void (*iterator)(void *data, u8 *mac, 751 struct ieee80211_vif *vif), 752 void *data) 753 { 754 struct ieee80211_local *local = hw_to_local(hw); 755 756 mutex_lock(&local->iflist_mtx); 757 __iterate_interfaces(local, iter_flags, iterator, data); 758 mutex_unlock(&local->iflist_mtx); 759 } 760 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 761 762 void ieee80211_iterate_active_interfaces_atomic( 763 struct ieee80211_hw *hw, u32 iter_flags, 764 void (*iterator)(void *data, u8 *mac, 765 struct ieee80211_vif *vif), 766 void *data) 767 { 768 struct ieee80211_local *local = hw_to_local(hw); 769 770 rcu_read_lock(); 771 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 772 iterator, data); 773 rcu_read_unlock(); 774 } 775 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 776 777 void ieee80211_iterate_active_interfaces_rtnl( 778 struct ieee80211_hw *hw, u32 iter_flags, 779 void (*iterator)(void *data, u8 *mac, 780 struct ieee80211_vif *vif), 781 void *data) 782 { 783 struct ieee80211_local *local = hw_to_local(hw); 784 785 ASSERT_RTNL(); 786 787 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 788 iterator, data); 789 } 790 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 791 792 static void __iterate_stations(struct ieee80211_local *local, 793 void (*iterator)(void *data, 794 struct ieee80211_sta *sta), 795 void *data) 796 { 797 struct sta_info *sta; 798 799 list_for_each_entry_rcu(sta, &local->sta_list, list) { 800 if (!sta->uploaded) 801 continue; 802 803 iterator(data, &sta->sta); 804 } 805 } 806 807 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 808 void (*iterator)(void *data, 809 struct ieee80211_sta *sta), 810 void *data) 811 { 812 struct ieee80211_local *local = hw_to_local(hw); 813 814 rcu_read_lock(); 815 __iterate_stations(local, iterator, data); 816 rcu_read_unlock(); 817 } 818 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 819 820 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 821 { 822 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 823 824 if (!ieee80211_sdata_running(sdata) || 825 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 826 return NULL; 827 return &sdata->vif; 828 } 829 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 830 831 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 832 { 833 struct ieee80211_sub_if_data *sdata; 834 835 if (!vif) 836 return NULL; 837 838 sdata = vif_to_sdata(vif); 839 840 if (!ieee80211_sdata_running(sdata) || 841 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 842 return NULL; 843 844 return &sdata->wdev; 845 } 846 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 847 848 /* 849 * Nothing should have been stuffed into the workqueue during 850 * the suspend->resume cycle. Since we can't check each caller 851 * of this function if we are already quiescing / suspended, 852 * check here and don't WARN since this can actually happen when 853 * the rx path (for example) is racing against __ieee80211_suspend 854 * and suspending / quiescing was set after the rx path checked 855 * them. 856 */ 857 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 858 { 859 if (local->quiescing || (local->suspended && !local->resuming)) { 860 pr_warn("queueing ieee80211 work while going to suspend\n"); 861 return false; 862 } 863 864 return true; 865 } 866 867 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 868 { 869 struct ieee80211_local *local = hw_to_local(hw); 870 871 if (!ieee80211_can_queue_work(local)) 872 return; 873 874 queue_work(local->workqueue, work); 875 } 876 EXPORT_SYMBOL(ieee80211_queue_work); 877 878 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 879 struct delayed_work *dwork, 880 unsigned long delay) 881 { 882 struct ieee80211_local *local = hw_to_local(hw); 883 884 if (!ieee80211_can_queue_work(local)) 885 return; 886 887 queue_delayed_work(local->workqueue, dwork, delay); 888 } 889 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 890 891 static u32 892 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 893 struct ieee802_11_elems *elems, 894 u64 filter, u32 crc, 895 const struct element *check_inherit) 896 { 897 const struct element *elem; 898 bool calc_crc = filter != 0; 899 DECLARE_BITMAP(seen_elems, 256); 900 const u8 *ie; 901 902 bitmap_zero(seen_elems, 256); 903 904 for_each_element(elem, start, len) { 905 bool elem_parse_failed; 906 u8 id = elem->id; 907 u8 elen = elem->datalen; 908 const u8 *pos = elem->data; 909 910 if (check_inherit && 911 !cfg80211_is_element_inherited(elem, 912 check_inherit)) 913 continue; 914 915 switch (id) { 916 case WLAN_EID_SSID: 917 case WLAN_EID_SUPP_RATES: 918 case WLAN_EID_FH_PARAMS: 919 case WLAN_EID_DS_PARAMS: 920 case WLAN_EID_CF_PARAMS: 921 case WLAN_EID_TIM: 922 case WLAN_EID_IBSS_PARAMS: 923 case WLAN_EID_CHALLENGE: 924 case WLAN_EID_RSN: 925 case WLAN_EID_ERP_INFO: 926 case WLAN_EID_EXT_SUPP_RATES: 927 case WLAN_EID_HT_CAPABILITY: 928 case WLAN_EID_HT_OPERATION: 929 case WLAN_EID_VHT_CAPABILITY: 930 case WLAN_EID_VHT_OPERATION: 931 case WLAN_EID_MESH_ID: 932 case WLAN_EID_MESH_CONFIG: 933 case WLAN_EID_PEER_MGMT: 934 case WLAN_EID_PREQ: 935 case WLAN_EID_PREP: 936 case WLAN_EID_PERR: 937 case WLAN_EID_RANN: 938 case WLAN_EID_CHANNEL_SWITCH: 939 case WLAN_EID_EXT_CHANSWITCH_ANN: 940 case WLAN_EID_COUNTRY: 941 case WLAN_EID_PWR_CONSTRAINT: 942 case WLAN_EID_TIMEOUT_INTERVAL: 943 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 944 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 945 case WLAN_EID_CHAN_SWITCH_PARAM: 946 case WLAN_EID_EXT_CAPABILITY: 947 case WLAN_EID_CHAN_SWITCH_TIMING: 948 case WLAN_EID_LINK_ID: 949 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 950 /* 951 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 952 * that if the content gets bigger it might be needed more than once 953 */ 954 if (test_bit(id, seen_elems)) { 955 elems->parse_error = true; 956 continue; 957 } 958 break; 959 } 960 961 if (calc_crc && id < 64 && (filter & (1ULL << id))) 962 crc = crc32_be(crc, pos - 2, elen + 2); 963 964 elem_parse_failed = false; 965 966 switch (id) { 967 case WLAN_EID_LINK_ID: 968 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 969 elem_parse_failed = true; 970 break; 971 } 972 elems->lnk_id = (void *)(pos - 2); 973 break; 974 case WLAN_EID_CHAN_SWITCH_TIMING: 975 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 976 elem_parse_failed = true; 977 break; 978 } 979 elems->ch_sw_timing = (void *)pos; 980 break; 981 case WLAN_EID_EXT_CAPABILITY: 982 elems->ext_capab = pos; 983 elems->ext_capab_len = elen; 984 break; 985 case WLAN_EID_SSID: 986 elems->ssid = pos; 987 elems->ssid_len = elen; 988 break; 989 case WLAN_EID_SUPP_RATES: 990 elems->supp_rates = pos; 991 elems->supp_rates_len = elen; 992 break; 993 case WLAN_EID_DS_PARAMS: 994 if (elen >= 1) 995 elems->ds_params = pos; 996 else 997 elem_parse_failed = true; 998 break; 999 case WLAN_EID_TIM: 1000 if (elen >= sizeof(struct ieee80211_tim_ie)) { 1001 elems->tim = (void *)pos; 1002 elems->tim_len = elen; 1003 } else 1004 elem_parse_failed = true; 1005 break; 1006 case WLAN_EID_CHALLENGE: 1007 elems->challenge = pos; 1008 elems->challenge_len = elen; 1009 break; 1010 case WLAN_EID_VENDOR_SPECIFIC: 1011 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 1012 pos[2] == 0xf2) { 1013 /* Microsoft OUI (00:50:F2) */ 1014 1015 if (calc_crc) 1016 crc = crc32_be(crc, pos - 2, elen + 2); 1017 1018 if (elen >= 5 && pos[3] == 2) { 1019 /* OUI Type 2 - WMM IE */ 1020 if (pos[4] == 0) { 1021 elems->wmm_info = pos; 1022 elems->wmm_info_len = elen; 1023 } else if (pos[4] == 1) { 1024 elems->wmm_param = pos; 1025 elems->wmm_param_len = elen; 1026 } 1027 } 1028 } 1029 break; 1030 case WLAN_EID_RSN: 1031 elems->rsn = pos; 1032 elems->rsn_len = elen; 1033 break; 1034 case WLAN_EID_ERP_INFO: 1035 if (elen >= 1) 1036 elems->erp_info = pos; 1037 else 1038 elem_parse_failed = true; 1039 break; 1040 case WLAN_EID_EXT_SUPP_RATES: 1041 elems->ext_supp_rates = pos; 1042 elems->ext_supp_rates_len = elen; 1043 break; 1044 case WLAN_EID_HT_CAPABILITY: 1045 if (elen >= sizeof(struct ieee80211_ht_cap)) 1046 elems->ht_cap_elem = (void *)pos; 1047 else 1048 elem_parse_failed = true; 1049 break; 1050 case WLAN_EID_HT_OPERATION: 1051 if (elen >= sizeof(struct ieee80211_ht_operation)) 1052 elems->ht_operation = (void *)pos; 1053 else 1054 elem_parse_failed = true; 1055 break; 1056 case WLAN_EID_VHT_CAPABILITY: 1057 if (elen >= sizeof(struct ieee80211_vht_cap)) 1058 elems->vht_cap_elem = (void *)pos; 1059 else 1060 elem_parse_failed = true; 1061 break; 1062 case WLAN_EID_VHT_OPERATION: 1063 if (elen >= sizeof(struct ieee80211_vht_operation)) 1064 elems->vht_operation = (void *)pos; 1065 else 1066 elem_parse_failed = true; 1067 break; 1068 case WLAN_EID_OPMODE_NOTIF: 1069 if (elen > 0) 1070 elems->opmode_notif = pos; 1071 else 1072 elem_parse_failed = true; 1073 break; 1074 case WLAN_EID_MESH_ID: 1075 elems->mesh_id = pos; 1076 elems->mesh_id_len = elen; 1077 break; 1078 case WLAN_EID_MESH_CONFIG: 1079 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 1080 elems->mesh_config = (void *)pos; 1081 else 1082 elem_parse_failed = true; 1083 break; 1084 case WLAN_EID_PEER_MGMT: 1085 elems->peering = pos; 1086 elems->peering_len = elen; 1087 break; 1088 case WLAN_EID_MESH_AWAKE_WINDOW: 1089 if (elen >= 2) 1090 elems->awake_window = (void *)pos; 1091 break; 1092 case WLAN_EID_PREQ: 1093 elems->preq = pos; 1094 elems->preq_len = elen; 1095 break; 1096 case WLAN_EID_PREP: 1097 elems->prep = pos; 1098 elems->prep_len = elen; 1099 break; 1100 case WLAN_EID_PERR: 1101 elems->perr = pos; 1102 elems->perr_len = elen; 1103 break; 1104 case WLAN_EID_RANN: 1105 if (elen >= sizeof(struct ieee80211_rann_ie)) 1106 elems->rann = (void *)pos; 1107 else 1108 elem_parse_failed = true; 1109 break; 1110 case WLAN_EID_CHANNEL_SWITCH: 1111 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 1112 elem_parse_failed = true; 1113 break; 1114 } 1115 elems->ch_switch_ie = (void *)pos; 1116 break; 1117 case WLAN_EID_EXT_CHANSWITCH_ANN: 1118 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1119 elem_parse_failed = true; 1120 break; 1121 } 1122 elems->ext_chansw_ie = (void *)pos; 1123 break; 1124 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1125 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1126 elem_parse_failed = true; 1127 break; 1128 } 1129 elems->sec_chan_offs = (void *)pos; 1130 break; 1131 case WLAN_EID_CHAN_SWITCH_PARAM: 1132 if (elen != 1133 sizeof(*elems->mesh_chansw_params_ie)) { 1134 elem_parse_failed = true; 1135 break; 1136 } 1137 elems->mesh_chansw_params_ie = (void *)pos; 1138 break; 1139 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1140 if (!action || 1141 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1142 elem_parse_failed = true; 1143 break; 1144 } 1145 elems->wide_bw_chansw_ie = (void *)pos; 1146 break; 1147 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1148 if (action) { 1149 elem_parse_failed = true; 1150 break; 1151 } 1152 /* 1153 * This is a bit tricky, but as we only care about 1154 * the wide bandwidth channel switch element, so 1155 * just parse it out manually. 1156 */ 1157 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1158 pos, elen); 1159 if (ie) { 1160 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1161 elems->wide_bw_chansw_ie = 1162 (void *)(ie + 2); 1163 else 1164 elem_parse_failed = true; 1165 } 1166 break; 1167 case WLAN_EID_COUNTRY: 1168 elems->country_elem = pos; 1169 elems->country_elem_len = elen; 1170 break; 1171 case WLAN_EID_PWR_CONSTRAINT: 1172 if (elen != 1) { 1173 elem_parse_failed = true; 1174 break; 1175 } 1176 elems->pwr_constr_elem = pos; 1177 break; 1178 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1179 /* Lots of different options exist, but we only care 1180 * about the Dynamic Transmit Power Control element. 1181 * First check for the Cisco OUI, then for the DTPC 1182 * tag (0x00). 1183 */ 1184 if (elen < 4) { 1185 elem_parse_failed = true; 1186 break; 1187 } 1188 1189 if (pos[0] != 0x00 || pos[1] != 0x40 || 1190 pos[2] != 0x96 || pos[3] != 0x00) 1191 break; 1192 1193 if (elen != 6) { 1194 elem_parse_failed = true; 1195 break; 1196 } 1197 1198 if (calc_crc) 1199 crc = crc32_be(crc, pos - 2, elen + 2); 1200 1201 elems->cisco_dtpc_elem = pos; 1202 break; 1203 case WLAN_EID_TIMEOUT_INTERVAL: 1204 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1205 elems->timeout_int = (void *)pos; 1206 else 1207 elem_parse_failed = true; 1208 break; 1209 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1210 if (elen >= sizeof(*elems->max_idle_period_ie)) 1211 elems->max_idle_period_ie = (void *)pos; 1212 break; 1213 case WLAN_EID_EXTENSION: 1214 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA && 1215 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) { 1216 elems->mu_edca_param_set = (void *)&pos[1]; 1217 if (calc_crc) 1218 crc = crc32_be(crc, pos - 2, elen + 2); 1219 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) { 1220 elems->he_cap = (void *)&pos[1]; 1221 elems->he_cap_len = elen - 1; 1222 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION && 1223 elen >= sizeof(*elems->he_operation) && 1224 elen >= ieee80211_he_oper_size(&pos[1])) { 1225 elems->he_operation = (void *)&pos[1]; 1226 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) { 1227 elems->uora_element = (void *)&pos[1]; 1228 } else if (pos[0] == 1229 WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME && 1230 elen == 4) { 1231 elems->max_channel_switch_time = pos + 1; 1232 } else if (pos[0] == 1233 WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION && 1234 elen == 3) { 1235 elems->mbssid_config_ie = (void *)&pos[1]; 1236 } 1237 break; 1238 default: 1239 break; 1240 } 1241 1242 if (elem_parse_failed) 1243 elems->parse_error = true; 1244 else 1245 __set_bit(id, seen_elems); 1246 } 1247 1248 if (!for_each_element_completed(elem, start, len)) 1249 elems->parse_error = true; 1250 1251 return crc; 1252 } 1253 1254 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, 1255 struct ieee802_11_elems *elems, 1256 u8 *transmitter_bssid, 1257 u8 *bss_bssid, 1258 u8 *nontransmitted_profile) 1259 { 1260 const struct element *elem, *sub; 1261 size_t profile_len = 0; 1262 bool found = false; 1263 1264 if (!bss_bssid || !transmitter_bssid) 1265 return profile_len; 1266 1267 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) { 1268 if (elem->datalen < 2) 1269 continue; 1270 1271 for_each_element(sub, elem->data + 1, elem->datalen - 1) { 1272 u8 new_bssid[ETH_ALEN]; 1273 const u8 *index; 1274 1275 if (sub->id != 0 || sub->datalen < 4) { 1276 /* not a valid BSS profile */ 1277 continue; 1278 } 1279 1280 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || 1281 sub->data[1] != 2) { 1282 /* The first element of the 1283 * Nontransmitted BSSID Profile is not 1284 * the Nontransmitted BSSID Capability 1285 * element. 1286 */ 1287 continue; 1288 } 1289 1290 memset(nontransmitted_profile, 0, len); 1291 profile_len = cfg80211_merge_profile(start, len, 1292 elem, 1293 sub, 1294 nontransmitted_profile, 1295 len); 1296 1297 /* found a Nontransmitted BSSID Profile */ 1298 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, 1299 nontransmitted_profile, 1300 profile_len); 1301 if (!index || index[1] < 1 || index[2] == 0) { 1302 /* Invalid MBSSID Index element */ 1303 continue; 1304 } 1305 1306 cfg80211_gen_new_bssid(transmitter_bssid, 1307 elem->data[0], 1308 index[2], 1309 new_bssid); 1310 if (ether_addr_equal(new_bssid, bss_bssid)) { 1311 found = true; 1312 elems->bssid_index_len = index[1]; 1313 elems->bssid_index = (void *)&index[2]; 1314 break; 1315 } 1316 } 1317 } 1318 1319 return found ? profile_len : 0; 1320 } 1321 1322 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 1323 struct ieee802_11_elems *elems, 1324 u64 filter, u32 crc, u8 *transmitter_bssid, 1325 u8 *bss_bssid) 1326 { 1327 const struct element *non_inherit = NULL; 1328 u8 *nontransmitted_profile; 1329 int nontransmitted_profile_len = 0; 1330 1331 memset(elems, 0, sizeof(*elems)); 1332 elems->ie_start = start; 1333 elems->total_len = len; 1334 1335 nontransmitted_profile = kmalloc(len, GFP_ATOMIC); 1336 if (nontransmitted_profile) { 1337 nontransmitted_profile_len = 1338 ieee802_11_find_bssid_profile(start, len, elems, 1339 transmitter_bssid, 1340 bss_bssid, 1341 nontransmitted_profile); 1342 non_inherit = 1343 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, 1344 nontransmitted_profile, 1345 nontransmitted_profile_len); 1346 } 1347 1348 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, 1349 crc, non_inherit); 1350 1351 /* Override with nontransmitted profile, if found */ 1352 if (nontransmitted_profile_len) 1353 _ieee802_11_parse_elems_crc(nontransmitted_profile, 1354 nontransmitted_profile_len, 1355 action, elems, 0, 0, NULL); 1356 1357 if (elems->tim && !elems->parse_error) { 1358 const struct ieee80211_tim_ie *tim_ie = elems->tim; 1359 1360 elems->dtim_period = tim_ie->dtim_period; 1361 elems->dtim_count = tim_ie->dtim_count; 1362 } 1363 1364 /* Override DTIM period and count if needed */ 1365 if (elems->bssid_index && 1366 elems->bssid_index_len >= 1367 offsetofend(struct ieee80211_bssid_index, dtim_period)) 1368 elems->dtim_period = elems->bssid_index->dtim_period; 1369 1370 if (elems->bssid_index && 1371 elems->bssid_index_len >= 1372 offsetofend(struct ieee80211_bssid_index, dtim_count)) 1373 elems->dtim_count = elems->bssid_index->dtim_count; 1374 1375 kfree(nontransmitted_profile); 1376 1377 return crc; 1378 } 1379 1380 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1381 struct ieee80211_tx_queue_params 1382 *qparam, int ac) 1383 { 1384 struct ieee80211_chanctx_conf *chanctx_conf; 1385 const struct ieee80211_reg_rule *rrule; 1386 const struct ieee80211_wmm_ac *wmm_ac; 1387 u16 center_freq = 0; 1388 1389 if (sdata->vif.type != NL80211_IFTYPE_AP && 1390 sdata->vif.type != NL80211_IFTYPE_STATION) 1391 return; 1392 1393 rcu_read_lock(); 1394 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1395 if (chanctx_conf) 1396 center_freq = chanctx_conf->def.chan->center_freq; 1397 1398 if (!center_freq) { 1399 rcu_read_unlock(); 1400 return; 1401 } 1402 1403 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1404 1405 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1406 rcu_read_unlock(); 1407 return; 1408 } 1409 1410 if (sdata->vif.type == NL80211_IFTYPE_AP) 1411 wmm_ac = &rrule->wmm_rule.ap[ac]; 1412 else 1413 wmm_ac = &rrule->wmm_rule.client[ac]; 1414 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1415 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1416 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1417 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1418 rcu_read_unlock(); 1419 } 1420 1421 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1422 bool bss_notify, bool enable_qos) 1423 { 1424 struct ieee80211_local *local = sdata->local; 1425 struct ieee80211_tx_queue_params qparam; 1426 struct ieee80211_chanctx_conf *chanctx_conf; 1427 int ac; 1428 bool use_11b; 1429 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1430 int aCWmin, aCWmax; 1431 1432 if (!local->ops->conf_tx) 1433 return; 1434 1435 if (local->hw.queues < IEEE80211_NUM_ACS) 1436 return; 1437 1438 memset(&qparam, 0, sizeof(qparam)); 1439 1440 rcu_read_lock(); 1441 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1442 use_11b = (chanctx_conf && 1443 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1444 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1445 rcu_read_unlock(); 1446 1447 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1448 1449 /* Set defaults according to 802.11-2007 Table 7-37 */ 1450 aCWmax = 1023; 1451 if (use_11b) 1452 aCWmin = 31; 1453 else 1454 aCWmin = 15; 1455 1456 /* Confiure old 802.11b/g medium access rules. */ 1457 qparam.cw_max = aCWmax; 1458 qparam.cw_min = aCWmin; 1459 qparam.txop = 0; 1460 qparam.aifs = 2; 1461 1462 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1463 /* Update if QoS is enabled. */ 1464 if (enable_qos) { 1465 switch (ac) { 1466 case IEEE80211_AC_BK: 1467 qparam.cw_max = aCWmax; 1468 qparam.cw_min = aCWmin; 1469 qparam.txop = 0; 1470 if (is_ocb) 1471 qparam.aifs = 9; 1472 else 1473 qparam.aifs = 7; 1474 break; 1475 /* never happens but let's not leave undefined */ 1476 default: 1477 case IEEE80211_AC_BE: 1478 qparam.cw_max = aCWmax; 1479 qparam.cw_min = aCWmin; 1480 qparam.txop = 0; 1481 if (is_ocb) 1482 qparam.aifs = 6; 1483 else 1484 qparam.aifs = 3; 1485 break; 1486 case IEEE80211_AC_VI: 1487 qparam.cw_max = aCWmin; 1488 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1489 if (is_ocb) 1490 qparam.txop = 0; 1491 else if (use_11b) 1492 qparam.txop = 6016/32; 1493 else 1494 qparam.txop = 3008/32; 1495 1496 if (is_ocb) 1497 qparam.aifs = 3; 1498 else 1499 qparam.aifs = 2; 1500 break; 1501 case IEEE80211_AC_VO: 1502 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1503 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1504 if (is_ocb) 1505 qparam.txop = 0; 1506 else if (use_11b) 1507 qparam.txop = 3264/32; 1508 else 1509 qparam.txop = 1504/32; 1510 qparam.aifs = 2; 1511 break; 1512 } 1513 } 1514 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1515 1516 qparam.uapsd = false; 1517 1518 sdata->tx_conf[ac] = qparam; 1519 drv_conf_tx(local, sdata, ac, &qparam); 1520 } 1521 1522 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1523 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1524 sdata->vif.type != NL80211_IFTYPE_NAN) { 1525 sdata->vif.bss_conf.qos = enable_qos; 1526 if (bss_notify) 1527 ieee80211_bss_info_change_notify(sdata, 1528 BSS_CHANGED_QOS); 1529 } 1530 } 1531 1532 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1533 u16 transaction, u16 auth_alg, u16 status, 1534 const u8 *extra, size_t extra_len, const u8 *da, 1535 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1536 u32 tx_flags) 1537 { 1538 struct ieee80211_local *local = sdata->local; 1539 struct sk_buff *skb; 1540 struct ieee80211_mgmt *mgmt; 1541 int err; 1542 1543 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1544 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1545 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1546 if (!skb) 1547 return; 1548 1549 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1550 1551 mgmt = skb_put_zero(skb, 24 + 6); 1552 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1553 IEEE80211_STYPE_AUTH); 1554 memcpy(mgmt->da, da, ETH_ALEN); 1555 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1556 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1557 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1558 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1559 mgmt->u.auth.status_code = cpu_to_le16(status); 1560 if (extra) 1561 skb_put_data(skb, extra, extra_len); 1562 1563 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1564 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1565 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1566 WARN_ON(err); 1567 } 1568 1569 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1570 tx_flags; 1571 ieee80211_tx_skb(sdata, skb); 1572 } 1573 1574 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1575 const u8 *bssid, u16 stype, u16 reason, 1576 bool send_frame, u8 *frame_buf) 1577 { 1578 struct ieee80211_local *local = sdata->local; 1579 struct sk_buff *skb; 1580 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1581 1582 /* build frame */ 1583 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1584 mgmt->duration = 0; /* initialize only */ 1585 mgmt->seq_ctrl = 0; /* initialize only */ 1586 memcpy(mgmt->da, bssid, ETH_ALEN); 1587 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1588 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1589 /* u.deauth.reason_code == u.disassoc.reason_code */ 1590 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1591 1592 if (send_frame) { 1593 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1594 IEEE80211_DEAUTH_FRAME_LEN); 1595 if (!skb) 1596 return; 1597 1598 skb_reserve(skb, local->hw.extra_tx_headroom); 1599 1600 /* copy in frame */ 1601 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1602 1603 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1604 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1605 IEEE80211_SKB_CB(skb)->flags |= 1606 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1607 1608 ieee80211_tx_skb(sdata, skb); 1609 } 1610 } 1611 1612 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1613 u8 *buffer, size_t buffer_len, 1614 const u8 *ie, size_t ie_len, 1615 enum nl80211_band band, 1616 u32 rate_mask, 1617 struct cfg80211_chan_def *chandef, 1618 size_t *offset, u32 flags) 1619 { 1620 struct ieee80211_supported_band *sband; 1621 const struct ieee80211_sta_he_cap *he_cap; 1622 u8 *pos = buffer, *end = buffer + buffer_len; 1623 size_t noffset; 1624 int supp_rates_len, i; 1625 u8 rates[32]; 1626 int num_rates; 1627 int ext_rates_len; 1628 int shift; 1629 u32 rate_flags; 1630 bool have_80mhz = false; 1631 1632 *offset = 0; 1633 1634 sband = local->hw.wiphy->bands[band]; 1635 if (WARN_ON_ONCE(!sband)) 1636 return 0; 1637 1638 rate_flags = ieee80211_chandef_rate_flags(chandef); 1639 shift = ieee80211_chandef_get_shift(chandef); 1640 1641 num_rates = 0; 1642 for (i = 0; i < sband->n_bitrates; i++) { 1643 if ((BIT(i) & rate_mask) == 0) 1644 continue; /* skip rate */ 1645 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1646 continue; 1647 1648 rates[num_rates++] = 1649 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1650 (1 << shift) * 5); 1651 } 1652 1653 supp_rates_len = min_t(int, num_rates, 8); 1654 1655 if (end - pos < 2 + supp_rates_len) 1656 goto out_err; 1657 *pos++ = WLAN_EID_SUPP_RATES; 1658 *pos++ = supp_rates_len; 1659 memcpy(pos, rates, supp_rates_len); 1660 pos += supp_rates_len; 1661 1662 /* insert "request information" if in custom IEs */ 1663 if (ie && ie_len) { 1664 static const u8 before_extrates[] = { 1665 WLAN_EID_SSID, 1666 WLAN_EID_SUPP_RATES, 1667 WLAN_EID_REQUEST, 1668 }; 1669 noffset = ieee80211_ie_split(ie, ie_len, 1670 before_extrates, 1671 ARRAY_SIZE(before_extrates), 1672 *offset); 1673 if (end - pos < noffset - *offset) 1674 goto out_err; 1675 memcpy(pos, ie + *offset, noffset - *offset); 1676 pos += noffset - *offset; 1677 *offset = noffset; 1678 } 1679 1680 ext_rates_len = num_rates - supp_rates_len; 1681 if (ext_rates_len > 0) { 1682 if (end - pos < 2 + ext_rates_len) 1683 goto out_err; 1684 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1685 *pos++ = ext_rates_len; 1686 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1687 pos += ext_rates_len; 1688 } 1689 1690 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1691 if (end - pos < 3) 1692 goto out_err; 1693 *pos++ = WLAN_EID_DS_PARAMS; 1694 *pos++ = 1; 1695 *pos++ = ieee80211_frequency_to_channel( 1696 chandef->chan->center_freq); 1697 } 1698 1699 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1700 goto done; 1701 1702 /* insert custom IEs that go before HT */ 1703 if (ie && ie_len) { 1704 static const u8 before_ht[] = { 1705 /* 1706 * no need to list the ones split off already 1707 * (or generated here) 1708 */ 1709 WLAN_EID_DS_PARAMS, 1710 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1711 }; 1712 noffset = ieee80211_ie_split(ie, ie_len, 1713 before_ht, ARRAY_SIZE(before_ht), 1714 *offset); 1715 if (end - pos < noffset - *offset) 1716 goto out_err; 1717 memcpy(pos, ie + *offset, noffset - *offset); 1718 pos += noffset - *offset; 1719 *offset = noffset; 1720 } 1721 1722 if (sband->ht_cap.ht_supported) { 1723 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1724 goto out_err; 1725 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1726 sband->ht_cap.cap); 1727 } 1728 1729 /* insert custom IEs that go before VHT */ 1730 if (ie && ie_len) { 1731 static const u8 before_vht[] = { 1732 /* 1733 * no need to list the ones split off already 1734 * (or generated here) 1735 */ 1736 WLAN_EID_BSS_COEX_2040, 1737 WLAN_EID_EXT_CAPABILITY, 1738 WLAN_EID_SSID_LIST, 1739 WLAN_EID_CHANNEL_USAGE, 1740 WLAN_EID_INTERWORKING, 1741 WLAN_EID_MESH_ID, 1742 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1743 }; 1744 noffset = ieee80211_ie_split(ie, ie_len, 1745 before_vht, ARRAY_SIZE(before_vht), 1746 *offset); 1747 if (end - pos < noffset - *offset) 1748 goto out_err; 1749 memcpy(pos, ie + *offset, noffset - *offset); 1750 pos += noffset - *offset; 1751 *offset = noffset; 1752 } 1753 1754 /* Check if any channel in this sband supports at least 80 MHz */ 1755 for (i = 0; i < sband->n_channels; i++) { 1756 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1757 IEEE80211_CHAN_NO_80MHZ)) 1758 continue; 1759 1760 have_80mhz = true; 1761 break; 1762 } 1763 1764 if (sband->vht_cap.vht_supported && have_80mhz) { 1765 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1766 goto out_err; 1767 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1768 sband->vht_cap.cap); 1769 } 1770 1771 /* insert custom IEs that go before HE */ 1772 if (ie && ie_len) { 1773 static const u8 before_he[] = { 1774 /* 1775 * no need to list the ones split off before VHT 1776 * or generated here 1777 */ 1778 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1779 WLAN_EID_AP_CSN, 1780 /* TODO: add 11ah/11aj/11ak elements */ 1781 }; 1782 noffset = ieee80211_ie_split(ie, ie_len, 1783 before_he, ARRAY_SIZE(before_he), 1784 *offset); 1785 if (end - pos < noffset - *offset) 1786 goto out_err; 1787 memcpy(pos, ie + *offset, noffset - *offset); 1788 pos += noffset - *offset; 1789 *offset = noffset; 1790 } 1791 1792 he_cap = ieee80211_get_he_sta_cap(sband); 1793 if (he_cap) { 1794 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1795 if (!pos) 1796 goto out_err; 1797 } 1798 1799 /* 1800 * If adding more here, adjust code in main.c 1801 * that calculates local->scan_ies_len. 1802 */ 1803 1804 return pos - buffer; 1805 out_err: 1806 WARN_ONCE(1, "not enough space for preq IEs\n"); 1807 done: 1808 return pos - buffer; 1809 } 1810 1811 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1812 size_t buffer_len, 1813 struct ieee80211_scan_ies *ie_desc, 1814 const u8 *ie, size_t ie_len, 1815 u8 bands_used, u32 *rate_masks, 1816 struct cfg80211_chan_def *chandef, 1817 u32 flags) 1818 { 1819 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1820 int i; 1821 1822 memset(ie_desc, 0, sizeof(*ie_desc)); 1823 1824 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1825 if (bands_used & BIT(i)) { 1826 pos += ieee80211_build_preq_ies_band(local, 1827 buffer + pos, 1828 buffer_len - pos, 1829 ie, ie_len, i, 1830 rate_masks[i], 1831 chandef, 1832 &custom_ie_offset, 1833 flags); 1834 ie_desc->ies[i] = buffer + old_pos; 1835 ie_desc->len[i] = pos - old_pos; 1836 old_pos = pos; 1837 } 1838 } 1839 1840 /* add any remaining custom IEs */ 1841 if (ie && ie_len) { 1842 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1843 "not enough space for preq custom IEs\n")) 1844 return pos; 1845 memcpy(buffer + pos, ie + custom_ie_offset, 1846 ie_len - custom_ie_offset); 1847 ie_desc->common_ies = buffer + pos; 1848 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1849 pos += ie_len - custom_ie_offset; 1850 } 1851 1852 return pos; 1853 }; 1854 1855 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1856 const u8 *src, const u8 *dst, 1857 u32 ratemask, 1858 struct ieee80211_channel *chan, 1859 const u8 *ssid, size_t ssid_len, 1860 const u8 *ie, size_t ie_len, 1861 u32 flags) 1862 { 1863 struct ieee80211_local *local = sdata->local; 1864 struct cfg80211_chan_def chandef; 1865 struct sk_buff *skb; 1866 struct ieee80211_mgmt *mgmt; 1867 int ies_len; 1868 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1869 struct ieee80211_scan_ies dummy_ie_desc; 1870 1871 /* 1872 * Do not send DS Channel parameter for directed probe requests 1873 * in order to maximize the chance that we get a response. Some 1874 * badly-behaved APs don't respond when this parameter is included. 1875 */ 1876 chandef.width = sdata->vif.bss_conf.chandef.width; 1877 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1878 chandef.chan = NULL; 1879 else 1880 chandef.chan = chan; 1881 1882 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1883 100 + ie_len); 1884 if (!skb) 1885 return NULL; 1886 1887 rate_masks[chan->band] = ratemask; 1888 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1889 skb_tailroom(skb), &dummy_ie_desc, 1890 ie, ie_len, BIT(chan->band), 1891 rate_masks, &chandef, flags); 1892 skb_put(skb, ies_len); 1893 1894 if (dst) { 1895 mgmt = (struct ieee80211_mgmt *) skb->data; 1896 memcpy(mgmt->da, dst, ETH_ALEN); 1897 memcpy(mgmt->bssid, dst, ETH_ALEN); 1898 } 1899 1900 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1901 1902 return skb; 1903 } 1904 1905 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1906 struct ieee802_11_elems *elems, 1907 enum nl80211_band band, u32 *basic_rates) 1908 { 1909 struct ieee80211_supported_band *sband; 1910 size_t num_rates; 1911 u32 supp_rates, rate_flags; 1912 int i, j, shift; 1913 1914 sband = sdata->local->hw.wiphy->bands[band]; 1915 if (WARN_ON(!sband)) 1916 return 1; 1917 1918 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1919 shift = ieee80211_vif_get_shift(&sdata->vif); 1920 1921 num_rates = sband->n_bitrates; 1922 supp_rates = 0; 1923 for (i = 0; i < elems->supp_rates_len + 1924 elems->ext_supp_rates_len; i++) { 1925 u8 rate = 0; 1926 int own_rate; 1927 bool is_basic; 1928 if (i < elems->supp_rates_len) 1929 rate = elems->supp_rates[i]; 1930 else if (elems->ext_supp_rates) 1931 rate = elems->ext_supp_rates 1932 [i - elems->supp_rates_len]; 1933 own_rate = 5 * (rate & 0x7f); 1934 is_basic = !!(rate & 0x80); 1935 1936 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1937 continue; 1938 1939 for (j = 0; j < num_rates; j++) { 1940 int brate; 1941 if ((rate_flags & sband->bitrates[j].flags) 1942 != rate_flags) 1943 continue; 1944 1945 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1946 1 << shift); 1947 1948 if (brate == own_rate) { 1949 supp_rates |= BIT(j); 1950 if (basic_rates && is_basic) 1951 *basic_rates |= BIT(j); 1952 } 1953 } 1954 } 1955 return supp_rates; 1956 } 1957 1958 void ieee80211_stop_device(struct ieee80211_local *local) 1959 { 1960 ieee80211_led_radio(local, false); 1961 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1962 1963 cancel_work_sync(&local->reconfig_filter); 1964 1965 flush_workqueue(local->workqueue); 1966 drv_stop(local); 1967 } 1968 1969 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1970 bool aborted) 1971 { 1972 /* It's possible that we don't handle the scan completion in 1973 * time during suspend, so if it's still marked as completed 1974 * here, queue the work and flush it to clean things up. 1975 * Instead of calling the worker function directly here, we 1976 * really queue it to avoid potential races with other flows 1977 * scheduling the same work. 1978 */ 1979 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1980 /* If coming from reconfiguration failure, abort the scan so 1981 * we don't attempt to continue a partial HW scan - which is 1982 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1983 * completed scan, and a 5 GHz portion is still pending. 1984 */ 1985 if (aborted) 1986 set_bit(SCAN_ABORTED, &local->scanning); 1987 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1988 flush_delayed_work(&local->scan_work); 1989 } 1990 } 1991 1992 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1993 { 1994 struct ieee80211_sub_if_data *sdata; 1995 struct ieee80211_chanctx *ctx; 1996 1997 /* 1998 * We get here if during resume the device can't be restarted properly. 1999 * We might also get here if this happens during HW reset, which is a 2000 * slightly different situation and we need to drop all connections in 2001 * the latter case. 2002 * 2003 * Ask cfg80211 to turn off all interfaces, this will result in more 2004 * warnings but at least we'll then get into a clean stopped state. 2005 */ 2006 2007 local->resuming = false; 2008 local->suspended = false; 2009 local->in_reconfig = false; 2010 2011 ieee80211_flush_completed_scan(local, true); 2012 2013 /* scheduled scan clearly can't be running any more, but tell 2014 * cfg80211 and clear local state 2015 */ 2016 ieee80211_sched_scan_end(local); 2017 2018 list_for_each_entry(sdata, &local->interfaces, list) 2019 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 2020 2021 /* Mark channel contexts as not being in the driver any more to avoid 2022 * removing them from the driver during the shutdown process... 2023 */ 2024 mutex_lock(&local->chanctx_mtx); 2025 list_for_each_entry(ctx, &local->chanctx_list, list) 2026 ctx->driver_present = false; 2027 mutex_unlock(&local->chanctx_mtx); 2028 2029 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 2030 } 2031 2032 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 2033 struct ieee80211_sub_if_data *sdata) 2034 { 2035 struct ieee80211_chanctx_conf *conf; 2036 struct ieee80211_chanctx *ctx; 2037 2038 if (!local->use_chanctx) 2039 return; 2040 2041 mutex_lock(&local->chanctx_mtx); 2042 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2043 lockdep_is_held(&local->chanctx_mtx)); 2044 if (conf) { 2045 ctx = container_of(conf, struct ieee80211_chanctx, conf); 2046 drv_assign_vif_chanctx(local, sdata, ctx); 2047 } 2048 mutex_unlock(&local->chanctx_mtx); 2049 } 2050 2051 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 2052 { 2053 struct ieee80211_local *local = sdata->local; 2054 struct sta_info *sta; 2055 2056 /* add STAs back */ 2057 mutex_lock(&local->sta_mtx); 2058 list_for_each_entry(sta, &local->sta_list, list) { 2059 enum ieee80211_sta_state state; 2060 2061 if (!sta->uploaded || sta->sdata != sdata) 2062 continue; 2063 2064 for (state = IEEE80211_STA_NOTEXIST; 2065 state < sta->sta_state; state++) 2066 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2067 state + 1)); 2068 } 2069 mutex_unlock(&local->sta_mtx); 2070 } 2071 2072 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 2073 { 2074 struct cfg80211_nan_func *func, **funcs; 2075 int res, id, i = 0; 2076 2077 res = drv_start_nan(sdata->local, sdata, 2078 &sdata->u.nan.conf); 2079 if (WARN_ON(res)) 2080 return res; 2081 2082 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 2083 sizeof(*funcs), 2084 GFP_KERNEL); 2085 if (!funcs) 2086 return -ENOMEM; 2087 2088 /* Add all the functions: 2089 * This is a little bit ugly. We need to call a potentially sleeping 2090 * callback for each NAN function, so we can't hold the spinlock. 2091 */ 2092 spin_lock_bh(&sdata->u.nan.func_lock); 2093 2094 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 2095 funcs[i++] = func; 2096 2097 spin_unlock_bh(&sdata->u.nan.func_lock); 2098 2099 for (i = 0; funcs[i]; i++) { 2100 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 2101 if (WARN_ON(res)) 2102 ieee80211_nan_func_terminated(&sdata->vif, 2103 funcs[i]->instance_id, 2104 NL80211_NAN_FUNC_TERM_REASON_ERROR, 2105 GFP_KERNEL); 2106 } 2107 2108 kfree(funcs); 2109 2110 return 0; 2111 } 2112 2113 int ieee80211_reconfig(struct ieee80211_local *local) 2114 { 2115 struct ieee80211_hw *hw = &local->hw; 2116 struct ieee80211_sub_if_data *sdata; 2117 struct ieee80211_chanctx *ctx; 2118 struct sta_info *sta; 2119 int res, i; 2120 bool reconfig_due_to_wowlan = false; 2121 struct ieee80211_sub_if_data *sched_scan_sdata; 2122 struct cfg80211_sched_scan_request *sched_scan_req; 2123 bool sched_scan_stopped = false; 2124 bool suspended = local->suspended; 2125 2126 /* nothing to do if HW shouldn't run */ 2127 if (!local->open_count) 2128 goto wake_up; 2129 2130 #ifdef CONFIG_PM 2131 if (suspended) 2132 local->resuming = true; 2133 2134 if (local->wowlan) { 2135 /* 2136 * In the wowlan case, both mac80211 and the device 2137 * are functional when the resume op is called, so 2138 * clear local->suspended so the device could operate 2139 * normally (e.g. pass rx frames). 2140 */ 2141 local->suspended = false; 2142 res = drv_resume(local); 2143 local->wowlan = false; 2144 if (res < 0) { 2145 local->resuming = false; 2146 return res; 2147 } 2148 if (res == 0) 2149 goto wake_up; 2150 WARN_ON(res > 1); 2151 /* 2152 * res is 1, which means the driver requested 2153 * to go through a regular reset on wakeup. 2154 * restore local->suspended in this case. 2155 */ 2156 reconfig_due_to_wowlan = true; 2157 local->suspended = true; 2158 } 2159 #endif 2160 2161 /* 2162 * In case of hw_restart during suspend (without wowlan), 2163 * cancel restart work, as we are reconfiguring the device 2164 * anyway. 2165 * Note that restart_work is scheduled on a frozen workqueue, 2166 * so we can't deadlock in this case. 2167 */ 2168 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 2169 cancel_work_sync(&local->restart_work); 2170 2171 local->started = false; 2172 2173 /* 2174 * Upon resume hardware can sometimes be goofy due to 2175 * various platform / driver / bus issues, so restarting 2176 * the device may at times not work immediately. Propagate 2177 * the error. 2178 */ 2179 res = drv_start(local); 2180 if (res) { 2181 if (suspended) 2182 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 2183 else 2184 WARN(1, "Hardware became unavailable during restart.\n"); 2185 ieee80211_handle_reconfig_failure(local); 2186 return res; 2187 } 2188 2189 /* setup fragmentation threshold */ 2190 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 2191 2192 /* setup RTS threshold */ 2193 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 2194 2195 /* reset coverage class */ 2196 drv_set_coverage_class(local, hw->wiphy->coverage_class); 2197 2198 ieee80211_led_radio(local, true); 2199 ieee80211_mod_tpt_led_trig(local, 2200 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2201 2202 /* add interfaces */ 2203 sdata = rtnl_dereference(local->monitor_sdata); 2204 if (sdata) { 2205 /* in HW restart it exists already */ 2206 WARN_ON(local->resuming); 2207 res = drv_add_interface(local, sdata); 2208 if (WARN_ON(res)) { 2209 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2210 synchronize_net(); 2211 kfree(sdata); 2212 } 2213 } 2214 2215 list_for_each_entry(sdata, &local->interfaces, list) { 2216 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2217 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2218 ieee80211_sdata_running(sdata)) { 2219 res = drv_add_interface(local, sdata); 2220 if (WARN_ON(res)) 2221 break; 2222 } 2223 } 2224 2225 /* If adding any of the interfaces failed above, roll back and 2226 * report failure. 2227 */ 2228 if (res) { 2229 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2230 list) 2231 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2232 sdata->vif.type != NL80211_IFTYPE_MONITOR && 2233 ieee80211_sdata_running(sdata)) 2234 drv_remove_interface(local, sdata); 2235 ieee80211_handle_reconfig_failure(local); 2236 return res; 2237 } 2238 2239 /* add channel contexts */ 2240 if (local->use_chanctx) { 2241 mutex_lock(&local->chanctx_mtx); 2242 list_for_each_entry(ctx, &local->chanctx_list, list) 2243 if (ctx->replace_state != 2244 IEEE80211_CHANCTX_REPLACES_OTHER) 2245 WARN_ON(drv_add_chanctx(local, ctx)); 2246 mutex_unlock(&local->chanctx_mtx); 2247 2248 sdata = rtnl_dereference(local->monitor_sdata); 2249 if (sdata && ieee80211_sdata_running(sdata)) 2250 ieee80211_assign_chanctx(local, sdata); 2251 } 2252 2253 /* reconfigure hardware */ 2254 ieee80211_hw_config(local, ~0); 2255 2256 ieee80211_configure_filter(local); 2257 2258 /* Finally also reconfigure all the BSS information */ 2259 list_for_each_entry(sdata, &local->interfaces, list) { 2260 u32 changed; 2261 2262 if (!ieee80211_sdata_running(sdata)) 2263 continue; 2264 2265 ieee80211_assign_chanctx(local, sdata); 2266 2267 switch (sdata->vif.type) { 2268 case NL80211_IFTYPE_AP_VLAN: 2269 case NL80211_IFTYPE_MONITOR: 2270 break; 2271 case NL80211_IFTYPE_ADHOC: 2272 if (sdata->vif.bss_conf.ibss_joined) 2273 WARN_ON(drv_join_ibss(local, sdata)); 2274 /* fall through */ 2275 default: 2276 ieee80211_reconfig_stations(sdata); 2277 /* fall through */ 2278 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2279 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2280 drv_conf_tx(local, sdata, i, 2281 &sdata->tx_conf[i]); 2282 break; 2283 } 2284 2285 /* common change flags for all interface types */ 2286 changed = BSS_CHANGED_ERP_CTS_PROT | 2287 BSS_CHANGED_ERP_PREAMBLE | 2288 BSS_CHANGED_ERP_SLOT | 2289 BSS_CHANGED_HT | 2290 BSS_CHANGED_BASIC_RATES | 2291 BSS_CHANGED_BEACON_INT | 2292 BSS_CHANGED_BSSID | 2293 BSS_CHANGED_CQM | 2294 BSS_CHANGED_QOS | 2295 BSS_CHANGED_IDLE | 2296 BSS_CHANGED_TXPOWER | 2297 BSS_CHANGED_MCAST_RATE; 2298 2299 if (sdata->vif.mu_mimo_owner) 2300 changed |= BSS_CHANGED_MU_GROUPS; 2301 2302 switch (sdata->vif.type) { 2303 case NL80211_IFTYPE_STATION: 2304 changed |= BSS_CHANGED_ASSOC | 2305 BSS_CHANGED_ARP_FILTER | 2306 BSS_CHANGED_PS; 2307 2308 /* Re-send beacon info report to the driver */ 2309 if (sdata->u.mgd.have_beacon) 2310 changed |= BSS_CHANGED_BEACON_INFO; 2311 2312 if (sdata->vif.bss_conf.max_idle_period || 2313 sdata->vif.bss_conf.protected_keep_alive) 2314 changed |= BSS_CHANGED_KEEP_ALIVE; 2315 2316 sdata_lock(sdata); 2317 ieee80211_bss_info_change_notify(sdata, changed); 2318 sdata_unlock(sdata); 2319 break; 2320 case NL80211_IFTYPE_OCB: 2321 changed |= BSS_CHANGED_OCB; 2322 ieee80211_bss_info_change_notify(sdata, changed); 2323 break; 2324 case NL80211_IFTYPE_ADHOC: 2325 changed |= BSS_CHANGED_IBSS; 2326 /* fall through */ 2327 case NL80211_IFTYPE_AP: 2328 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2329 2330 if (sdata->vif.bss_conf.ftm_responder == 1 && 2331 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2332 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2333 changed |= BSS_CHANGED_FTM_RESPONDER; 2334 2335 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2336 changed |= BSS_CHANGED_AP_PROBE_RESP; 2337 2338 if (rcu_access_pointer(sdata->u.ap.beacon)) 2339 drv_start_ap(local, sdata); 2340 } 2341 2342 /* fall through */ 2343 case NL80211_IFTYPE_MESH_POINT: 2344 if (sdata->vif.bss_conf.enable_beacon) { 2345 changed |= BSS_CHANGED_BEACON | 2346 BSS_CHANGED_BEACON_ENABLED; 2347 ieee80211_bss_info_change_notify(sdata, changed); 2348 } 2349 break; 2350 case NL80211_IFTYPE_NAN: 2351 res = ieee80211_reconfig_nan(sdata); 2352 if (res < 0) { 2353 ieee80211_handle_reconfig_failure(local); 2354 return res; 2355 } 2356 break; 2357 case NL80211_IFTYPE_WDS: 2358 case NL80211_IFTYPE_AP_VLAN: 2359 case NL80211_IFTYPE_MONITOR: 2360 case NL80211_IFTYPE_P2P_DEVICE: 2361 /* nothing to do */ 2362 break; 2363 case NL80211_IFTYPE_UNSPECIFIED: 2364 case NUM_NL80211_IFTYPES: 2365 case NL80211_IFTYPE_P2P_CLIENT: 2366 case NL80211_IFTYPE_P2P_GO: 2367 WARN_ON(1); 2368 break; 2369 } 2370 } 2371 2372 ieee80211_recalc_ps(local); 2373 2374 /* 2375 * The sta might be in psm against the ap (e.g. because 2376 * this was the state before a hw restart), so we 2377 * explicitly send a null packet in order to make sure 2378 * it'll sync against the ap (and get out of psm). 2379 */ 2380 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2381 list_for_each_entry(sdata, &local->interfaces, list) { 2382 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2383 continue; 2384 if (!sdata->u.mgd.associated) 2385 continue; 2386 2387 ieee80211_send_nullfunc(local, sdata, false); 2388 } 2389 } 2390 2391 /* APs are now beaconing, add back stations */ 2392 mutex_lock(&local->sta_mtx); 2393 list_for_each_entry(sta, &local->sta_list, list) { 2394 enum ieee80211_sta_state state; 2395 2396 if (!sta->uploaded) 2397 continue; 2398 2399 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2400 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2401 continue; 2402 2403 for (state = IEEE80211_STA_NOTEXIST; 2404 state < sta->sta_state; state++) 2405 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2406 state + 1)); 2407 } 2408 mutex_unlock(&local->sta_mtx); 2409 2410 /* add back keys */ 2411 list_for_each_entry(sdata, &local->interfaces, list) 2412 ieee80211_reset_crypto_tx_tailroom(sdata); 2413 2414 list_for_each_entry(sdata, &local->interfaces, list) 2415 if (ieee80211_sdata_running(sdata)) 2416 ieee80211_enable_keys(sdata); 2417 2418 /* Reconfigure sched scan if it was interrupted by FW restart */ 2419 mutex_lock(&local->mtx); 2420 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2421 lockdep_is_held(&local->mtx)); 2422 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2423 lockdep_is_held(&local->mtx)); 2424 if (sched_scan_sdata && sched_scan_req) 2425 /* 2426 * Sched scan stopped, but we don't want to report it. Instead, 2427 * we're trying to reschedule. However, if more than one scan 2428 * plan was set, we cannot reschedule since we don't know which 2429 * scan plan was currently running (and some scan plans may have 2430 * already finished). 2431 */ 2432 if (sched_scan_req->n_scan_plans > 1 || 2433 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2434 sched_scan_req)) { 2435 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2436 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2437 sched_scan_stopped = true; 2438 } 2439 mutex_unlock(&local->mtx); 2440 2441 if (sched_scan_stopped) 2442 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2443 2444 wake_up: 2445 2446 if (local->monitors == local->open_count && local->monitors > 0) 2447 ieee80211_add_virtual_monitor(local); 2448 2449 /* 2450 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2451 * sessions can be established after a resume. 2452 * 2453 * Also tear down aggregation sessions since reconfiguring 2454 * them in a hardware restart scenario is not easily done 2455 * right now, and the hardware will have lost information 2456 * about the sessions, but we and the AP still think they 2457 * are active. This is really a workaround though. 2458 */ 2459 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2460 mutex_lock(&local->sta_mtx); 2461 2462 list_for_each_entry(sta, &local->sta_list, list) { 2463 if (!local->resuming) 2464 ieee80211_sta_tear_down_BA_sessions( 2465 sta, AGG_STOP_LOCAL_REQUEST); 2466 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2467 } 2468 2469 mutex_unlock(&local->sta_mtx); 2470 } 2471 2472 if (local->in_reconfig) { 2473 local->in_reconfig = false; 2474 barrier(); 2475 2476 /* Restart deferred ROCs */ 2477 mutex_lock(&local->mtx); 2478 ieee80211_start_next_roc(local); 2479 mutex_unlock(&local->mtx); 2480 2481 /* Requeue all works */ 2482 list_for_each_entry(sdata, &local->interfaces, list) 2483 ieee80211_queue_work(&local->hw, &sdata->work); 2484 } 2485 2486 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2487 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2488 false); 2489 2490 /* 2491 * If this is for hw restart things are still running. 2492 * We may want to change that later, however. 2493 */ 2494 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2495 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2496 2497 if (!suspended) 2498 return 0; 2499 2500 #ifdef CONFIG_PM 2501 /* first set suspended false, then resuming */ 2502 local->suspended = false; 2503 mb(); 2504 local->resuming = false; 2505 2506 ieee80211_flush_completed_scan(local, false); 2507 2508 if (local->open_count && !reconfig_due_to_wowlan) 2509 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2510 2511 list_for_each_entry(sdata, &local->interfaces, list) { 2512 if (!ieee80211_sdata_running(sdata)) 2513 continue; 2514 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2515 ieee80211_sta_restart(sdata); 2516 } 2517 2518 mod_timer(&local->sta_cleanup, jiffies + 1); 2519 #else 2520 WARN_ON(1); 2521 #endif 2522 2523 return 0; 2524 } 2525 2526 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2527 { 2528 struct ieee80211_sub_if_data *sdata; 2529 struct ieee80211_local *local; 2530 struct ieee80211_key *key; 2531 2532 if (WARN_ON(!vif)) 2533 return; 2534 2535 sdata = vif_to_sdata(vif); 2536 local = sdata->local; 2537 2538 if (WARN_ON(!local->resuming)) 2539 return; 2540 2541 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2542 return; 2543 2544 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2545 2546 mutex_lock(&local->key_mtx); 2547 list_for_each_entry(key, &sdata->key_list, list) 2548 key->flags |= KEY_FLAG_TAINTED; 2549 mutex_unlock(&local->key_mtx); 2550 } 2551 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2552 2553 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2554 { 2555 struct ieee80211_local *local = sdata->local; 2556 struct ieee80211_chanctx_conf *chanctx_conf; 2557 struct ieee80211_chanctx *chanctx; 2558 2559 mutex_lock(&local->chanctx_mtx); 2560 2561 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2562 lockdep_is_held(&local->chanctx_mtx)); 2563 2564 /* 2565 * This function can be called from a work, thus it may be possible 2566 * that the chanctx_conf is removed (due to a disconnection, for 2567 * example). 2568 * So nothing should be done in such case. 2569 */ 2570 if (!chanctx_conf) 2571 goto unlock; 2572 2573 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2574 ieee80211_recalc_smps_chanctx(local, chanctx); 2575 unlock: 2576 mutex_unlock(&local->chanctx_mtx); 2577 } 2578 2579 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2580 { 2581 struct ieee80211_local *local = sdata->local; 2582 struct ieee80211_chanctx_conf *chanctx_conf; 2583 struct ieee80211_chanctx *chanctx; 2584 2585 mutex_lock(&local->chanctx_mtx); 2586 2587 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2588 lockdep_is_held(&local->chanctx_mtx)); 2589 2590 if (WARN_ON_ONCE(!chanctx_conf)) 2591 goto unlock; 2592 2593 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2594 ieee80211_recalc_chanctx_min_def(local, chanctx); 2595 unlock: 2596 mutex_unlock(&local->chanctx_mtx); 2597 } 2598 2599 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2600 { 2601 size_t pos = offset; 2602 2603 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2604 pos += 2 + ies[pos + 1]; 2605 2606 return pos; 2607 } 2608 2609 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2610 int rssi_min_thold, 2611 int rssi_max_thold) 2612 { 2613 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2614 2615 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2616 return; 2617 2618 /* 2619 * Scale up threshold values before storing it, as the RSSI averaging 2620 * algorithm uses a scaled up value as well. Change this scaling 2621 * factor if the RSSI averaging algorithm changes. 2622 */ 2623 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2624 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2625 } 2626 2627 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2628 int rssi_min_thold, 2629 int rssi_max_thold) 2630 { 2631 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2632 2633 WARN_ON(rssi_min_thold == rssi_max_thold || 2634 rssi_min_thold > rssi_max_thold); 2635 2636 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2637 rssi_max_thold); 2638 } 2639 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2640 2641 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2642 { 2643 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2644 2645 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2646 } 2647 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2648 2649 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2650 u16 cap) 2651 { 2652 __le16 tmp; 2653 2654 *pos++ = WLAN_EID_HT_CAPABILITY; 2655 *pos++ = sizeof(struct ieee80211_ht_cap); 2656 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2657 2658 /* capability flags */ 2659 tmp = cpu_to_le16(cap); 2660 memcpy(pos, &tmp, sizeof(u16)); 2661 pos += sizeof(u16); 2662 2663 /* AMPDU parameters */ 2664 *pos++ = ht_cap->ampdu_factor | 2665 (ht_cap->ampdu_density << 2666 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2667 2668 /* MCS set */ 2669 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2670 pos += sizeof(ht_cap->mcs); 2671 2672 /* extended capabilities */ 2673 pos += sizeof(__le16); 2674 2675 /* BF capabilities */ 2676 pos += sizeof(__le32); 2677 2678 /* antenna selection */ 2679 pos += sizeof(u8); 2680 2681 return pos; 2682 } 2683 2684 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2685 u32 cap) 2686 { 2687 __le32 tmp; 2688 2689 *pos++ = WLAN_EID_VHT_CAPABILITY; 2690 *pos++ = sizeof(struct ieee80211_vht_cap); 2691 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2692 2693 /* capability flags */ 2694 tmp = cpu_to_le32(cap); 2695 memcpy(pos, &tmp, sizeof(u32)); 2696 pos += sizeof(u32); 2697 2698 /* VHT MCS set */ 2699 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2700 pos += sizeof(vht_cap->vht_mcs); 2701 2702 return pos; 2703 } 2704 2705 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2706 const struct ieee80211_sta_he_cap *he_cap, 2707 u8 *end) 2708 { 2709 u8 n; 2710 u8 ie_len; 2711 u8 *orig_pos = pos; 2712 2713 /* Make sure we have place for the IE */ 2714 /* 2715 * TODO: the 1 added is because this temporarily is under the EXTENSION 2716 * IE. Get rid of it when it moves. 2717 */ 2718 if (!he_cap) 2719 return orig_pos; 2720 2721 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2722 ie_len = 2 + 1 + 2723 sizeof(he_cap->he_cap_elem) + n + 2724 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2725 he_cap->he_cap_elem.phy_cap_info); 2726 2727 if ((end - pos) < ie_len) 2728 return orig_pos; 2729 2730 *pos++ = WLAN_EID_EXTENSION; 2731 pos++; /* We'll set the size later below */ 2732 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2733 2734 /* Fixed data */ 2735 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2736 pos += sizeof(he_cap->he_cap_elem); 2737 2738 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2739 pos += n; 2740 2741 /* Check if PPE Threshold should be present */ 2742 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2743 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2744 goto end; 2745 2746 /* 2747 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2748 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2749 */ 2750 n = hweight8(he_cap->ppe_thres[0] & 2751 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2752 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2753 IEEE80211_PPE_THRES_NSS_POS)); 2754 2755 /* 2756 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2757 * total size. 2758 */ 2759 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2760 n = DIV_ROUND_UP(n, 8); 2761 2762 /* Copy PPE Thresholds */ 2763 memcpy(pos, &he_cap->ppe_thres, n); 2764 pos += n; 2765 2766 end: 2767 orig_pos[1] = (pos - orig_pos) - 2; 2768 return pos; 2769 } 2770 2771 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2772 const struct cfg80211_chan_def *chandef, 2773 u16 prot_mode, bool rifs_mode) 2774 { 2775 struct ieee80211_ht_operation *ht_oper; 2776 /* Build HT Information */ 2777 *pos++ = WLAN_EID_HT_OPERATION; 2778 *pos++ = sizeof(struct ieee80211_ht_operation); 2779 ht_oper = (struct ieee80211_ht_operation *)pos; 2780 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2781 chandef->chan->center_freq); 2782 switch (chandef->width) { 2783 case NL80211_CHAN_WIDTH_160: 2784 case NL80211_CHAN_WIDTH_80P80: 2785 case NL80211_CHAN_WIDTH_80: 2786 case NL80211_CHAN_WIDTH_40: 2787 if (chandef->center_freq1 > chandef->chan->center_freq) 2788 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2789 else 2790 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2791 break; 2792 default: 2793 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2794 break; 2795 } 2796 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2797 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2798 chandef->width != NL80211_CHAN_WIDTH_20) 2799 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2800 2801 if (rifs_mode) 2802 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2803 2804 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2805 ht_oper->stbc_param = 0x0000; 2806 2807 /* It seems that Basic MCS set and Supported MCS set 2808 are identical for the first 10 bytes */ 2809 memset(&ht_oper->basic_set, 0, 16); 2810 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2811 2812 return pos + sizeof(struct ieee80211_ht_operation); 2813 } 2814 2815 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2816 const struct cfg80211_chan_def *chandef) 2817 { 2818 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2819 *pos++ = 3; /* IE length */ 2820 /* New channel width */ 2821 switch (chandef->width) { 2822 case NL80211_CHAN_WIDTH_80: 2823 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2824 break; 2825 case NL80211_CHAN_WIDTH_160: 2826 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2827 break; 2828 case NL80211_CHAN_WIDTH_80P80: 2829 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2830 break; 2831 default: 2832 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2833 } 2834 2835 /* new center frequency segment 0 */ 2836 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2837 /* new center frequency segment 1 */ 2838 if (chandef->center_freq2) 2839 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2840 else 2841 *pos++ = 0; 2842 } 2843 2844 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2845 const struct cfg80211_chan_def *chandef) 2846 { 2847 struct ieee80211_vht_operation *vht_oper; 2848 2849 *pos++ = WLAN_EID_VHT_OPERATION; 2850 *pos++ = sizeof(struct ieee80211_vht_operation); 2851 vht_oper = (struct ieee80211_vht_operation *)pos; 2852 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2853 chandef->center_freq1); 2854 if (chandef->center_freq2) 2855 vht_oper->center_freq_seg1_idx = 2856 ieee80211_frequency_to_channel(chandef->center_freq2); 2857 else 2858 vht_oper->center_freq_seg1_idx = 0x00; 2859 2860 switch (chandef->width) { 2861 case NL80211_CHAN_WIDTH_160: 2862 /* 2863 * Convert 160 MHz channel width to new style as interop 2864 * workaround. 2865 */ 2866 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2867 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2868 if (chandef->chan->center_freq < chandef->center_freq1) 2869 vht_oper->center_freq_seg0_idx -= 8; 2870 else 2871 vht_oper->center_freq_seg0_idx += 8; 2872 break; 2873 case NL80211_CHAN_WIDTH_80P80: 2874 /* 2875 * Convert 80+80 MHz channel width to new style as interop 2876 * workaround. 2877 */ 2878 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2879 break; 2880 case NL80211_CHAN_WIDTH_80: 2881 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2882 break; 2883 default: 2884 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2885 break; 2886 } 2887 2888 /* don't require special VHT peer rates */ 2889 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2890 2891 return pos + sizeof(struct ieee80211_vht_operation); 2892 } 2893 2894 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2895 struct cfg80211_chan_def *chandef) 2896 { 2897 enum nl80211_channel_type channel_type; 2898 2899 if (!ht_oper) 2900 return false; 2901 2902 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2903 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2904 channel_type = NL80211_CHAN_HT20; 2905 break; 2906 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2907 channel_type = NL80211_CHAN_HT40PLUS; 2908 break; 2909 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2910 channel_type = NL80211_CHAN_HT40MINUS; 2911 break; 2912 default: 2913 channel_type = NL80211_CHAN_NO_HT; 2914 return false; 2915 } 2916 2917 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2918 return true; 2919 } 2920 2921 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, 2922 const struct ieee80211_vht_operation *oper, 2923 const struct ieee80211_ht_operation *htop, 2924 struct cfg80211_chan_def *chandef) 2925 { 2926 struct cfg80211_chan_def new = *chandef; 2927 int cf0, cf1; 2928 int ccfs0, ccfs1, ccfs2; 2929 int ccf0, ccf1; 2930 2931 if (!oper || !htop) 2932 return false; 2933 2934 ccfs0 = oper->center_freq_seg0_idx; 2935 ccfs1 = oper->center_freq_seg1_idx; 2936 ccfs2 = (le16_to_cpu(htop->operation_mode) & 2937 IEEE80211_HT_OP_MODE_CCFS2_MASK) 2938 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 2939 2940 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */ 2941 ccf0 = ccfs0; 2942 ccf1 = ccfs1; 2943 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 2944 ccf1 = ccfs2; 2945 2946 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 2947 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 2948 2949 switch (oper->chan_width) { 2950 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2951 /* just use HT information directly */ 2952 break; 2953 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2954 new.width = NL80211_CHAN_WIDTH_80; 2955 new.center_freq1 = cf0; 2956 /* If needed, adjust based on the newer interop workaround. */ 2957 if (ccf1) { 2958 unsigned int diff; 2959 2960 diff = abs(ccf1 - ccf0); 2961 if (diff == 8) { 2962 new.width = NL80211_CHAN_WIDTH_160; 2963 new.center_freq1 = cf1; 2964 } else if (diff > 8) { 2965 new.width = NL80211_CHAN_WIDTH_80P80; 2966 new.center_freq2 = cf1; 2967 } 2968 } 2969 break; 2970 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2971 /* deprecated encoding */ 2972 new.width = NL80211_CHAN_WIDTH_160; 2973 new.center_freq1 = cf0; 2974 break; 2975 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2976 /* deprecated encoding */ 2977 new.width = NL80211_CHAN_WIDTH_80P80; 2978 new.center_freq1 = cf0; 2979 new.center_freq2 = cf1; 2980 break; 2981 default: 2982 return false; 2983 } 2984 2985 if (!cfg80211_chandef_valid(&new)) 2986 return false; 2987 2988 *chandef = new; 2989 return true; 2990 } 2991 2992 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2993 const struct ieee80211_supported_band *sband, 2994 const u8 *srates, int srates_len, u32 *rates) 2995 { 2996 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2997 int shift = ieee80211_chandef_get_shift(chandef); 2998 struct ieee80211_rate *br; 2999 int brate, rate, i, j, count = 0; 3000 3001 *rates = 0; 3002 3003 for (i = 0; i < srates_len; i++) { 3004 rate = srates[i] & 0x7f; 3005 3006 for (j = 0; j < sband->n_bitrates; j++) { 3007 br = &sband->bitrates[j]; 3008 if ((rate_flags & br->flags) != rate_flags) 3009 continue; 3010 3011 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 3012 if (brate == rate) { 3013 *rates |= BIT(j); 3014 count++; 3015 break; 3016 } 3017 } 3018 } 3019 return count; 3020 } 3021 3022 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 3023 struct sk_buff *skb, bool need_basic, 3024 enum nl80211_band band) 3025 { 3026 struct ieee80211_local *local = sdata->local; 3027 struct ieee80211_supported_band *sband; 3028 int rate, shift; 3029 u8 i, rates, *pos; 3030 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3031 u32 rate_flags; 3032 3033 shift = ieee80211_vif_get_shift(&sdata->vif); 3034 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3035 sband = local->hw.wiphy->bands[band]; 3036 rates = 0; 3037 for (i = 0; i < sband->n_bitrates; i++) { 3038 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3039 continue; 3040 rates++; 3041 } 3042 if (rates > 8) 3043 rates = 8; 3044 3045 if (skb_tailroom(skb) < rates + 2) 3046 return -ENOMEM; 3047 3048 pos = skb_put(skb, rates + 2); 3049 *pos++ = WLAN_EID_SUPP_RATES; 3050 *pos++ = rates; 3051 for (i = 0; i < rates; i++) { 3052 u8 basic = 0; 3053 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3054 continue; 3055 3056 if (need_basic && basic_rates & BIT(i)) 3057 basic = 0x80; 3058 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3059 5 * (1 << shift)); 3060 *pos++ = basic | (u8) rate; 3061 } 3062 3063 return 0; 3064 } 3065 3066 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 3067 struct sk_buff *skb, bool need_basic, 3068 enum nl80211_band band) 3069 { 3070 struct ieee80211_local *local = sdata->local; 3071 struct ieee80211_supported_band *sband; 3072 int rate, shift; 3073 u8 i, exrates, *pos; 3074 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 3075 u32 rate_flags; 3076 3077 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 3078 shift = ieee80211_vif_get_shift(&sdata->vif); 3079 3080 sband = local->hw.wiphy->bands[band]; 3081 exrates = 0; 3082 for (i = 0; i < sband->n_bitrates; i++) { 3083 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 3084 continue; 3085 exrates++; 3086 } 3087 3088 if (exrates > 8) 3089 exrates -= 8; 3090 else 3091 exrates = 0; 3092 3093 if (skb_tailroom(skb) < exrates + 2) 3094 return -ENOMEM; 3095 3096 if (exrates) { 3097 pos = skb_put(skb, exrates + 2); 3098 *pos++ = WLAN_EID_EXT_SUPP_RATES; 3099 *pos++ = exrates; 3100 for (i = 8; i < sband->n_bitrates; i++) { 3101 u8 basic = 0; 3102 if ((rate_flags & sband->bitrates[i].flags) 3103 != rate_flags) 3104 continue; 3105 if (need_basic && basic_rates & BIT(i)) 3106 basic = 0x80; 3107 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 3108 5 * (1 << shift)); 3109 *pos++ = basic | (u8) rate; 3110 } 3111 } 3112 return 0; 3113 } 3114 3115 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 3116 { 3117 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3118 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3119 3120 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 3121 /* non-managed type inferfaces */ 3122 return 0; 3123 } 3124 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 3125 } 3126 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3127 3128 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3129 { 3130 if (!mcs) 3131 return 1; 3132 3133 /* TODO: consider rx_highest */ 3134 3135 if (mcs->rx_mask[3]) 3136 return 4; 3137 if (mcs->rx_mask[2]) 3138 return 3; 3139 if (mcs->rx_mask[1]) 3140 return 2; 3141 return 1; 3142 } 3143 3144 /** 3145 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 3146 * @local: mac80211 hw info struct 3147 * @status: RX status 3148 * @mpdu_len: total MPDU length (including FCS) 3149 * @mpdu_offset: offset into MPDU to calculate timestamp at 3150 * 3151 * This function calculates the RX timestamp at the given MPDU offset, taking 3152 * into account what the RX timestamp was. An offset of 0 will just normalize 3153 * the timestamp to TSF at beginning of MPDU reception. 3154 */ 3155 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 3156 struct ieee80211_rx_status *status, 3157 unsigned int mpdu_len, 3158 unsigned int mpdu_offset) 3159 { 3160 u64 ts = status->mactime; 3161 struct rate_info ri; 3162 u16 rate; 3163 3164 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3165 return 0; 3166 3167 memset(&ri, 0, sizeof(ri)); 3168 3169 ri.bw = status->bw; 3170 3171 /* Fill cfg80211 rate info */ 3172 switch (status->encoding) { 3173 case RX_ENC_HT: 3174 ri.mcs = status->rate_idx; 3175 ri.flags |= RATE_INFO_FLAGS_MCS; 3176 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3177 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3178 break; 3179 case RX_ENC_VHT: 3180 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3181 ri.mcs = status->rate_idx; 3182 ri.nss = status->nss; 3183 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3184 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3185 break; 3186 default: 3187 WARN_ON(1); 3188 /* fall through */ 3189 case RX_ENC_LEGACY: { 3190 struct ieee80211_supported_band *sband; 3191 int shift = 0; 3192 int bitrate; 3193 3194 switch (status->bw) { 3195 case RATE_INFO_BW_10: 3196 shift = 1; 3197 break; 3198 case RATE_INFO_BW_5: 3199 shift = 2; 3200 break; 3201 } 3202 3203 sband = local->hw.wiphy->bands[status->band]; 3204 bitrate = sband->bitrates[status->rate_idx].bitrate; 3205 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 3206 3207 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 3208 /* TODO: handle HT/VHT preambles */ 3209 if (status->band == NL80211_BAND_5GHZ) { 3210 ts += 20 << shift; 3211 mpdu_offset += 2; 3212 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3213 ts += 96; 3214 } else { 3215 ts += 192; 3216 } 3217 } 3218 break; 3219 } 3220 } 3221 3222 rate = cfg80211_calculate_bitrate(&ri); 3223 if (WARN_ONCE(!rate, 3224 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3225 (unsigned long long)status->flag, status->rate_idx, 3226 status->nss)) 3227 return 0; 3228 3229 /* rewind from end of MPDU */ 3230 if (status->flag & RX_FLAG_MACTIME_END) 3231 ts -= mpdu_len * 8 * 10 / rate; 3232 3233 ts += mpdu_offset * 8 * 10 / rate; 3234 3235 return ts; 3236 } 3237 3238 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 3239 { 3240 struct ieee80211_sub_if_data *sdata; 3241 struct cfg80211_chan_def chandef; 3242 3243 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 3244 ASSERT_RTNL(); 3245 3246 mutex_lock(&local->mtx); 3247 list_for_each_entry(sdata, &local->interfaces, list) { 3248 /* it might be waiting for the local->mtx, but then 3249 * by the time it gets it, sdata->wdev.cac_started 3250 * will no longer be true 3251 */ 3252 cancel_delayed_work(&sdata->dfs_cac_timer_work); 3253 3254 if (sdata->wdev.cac_started) { 3255 chandef = sdata->vif.bss_conf.chandef; 3256 ieee80211_vif_release_channel(sdata); 3257 cfg80211_cac_event(sdata->dev, 3258 &chandef, 3259 NL80211_RADAR_CAC_ABORTED, 3260 GFP_KERNEL); 3261 } 3262 } 3263 mutex_unlock(&local->mtx); 3264 } 3265 3266 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 3267 { 3268 struct ieee80211_local *local = 3269 container_of(work, struct ieee80211_local, radar_detected_work); 3270 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 3271 struct ieee80211_chanctx *ctx; 3272 int num_chanctx = 0; 3273 3274 mutex_lock(&local->chanctx_mtx); 3275 list_for_each_entry(ctx, &local->chanctx_list, list) { 3276 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3277 continue; 3278 3279 num_chanctx++; 3280 chandef = ctx->conf.def; 3281 } 3282 mutex_unlock(&local->chanctx_mtx); 3283 3284 rtnl_lock(); 3285 ieee80211_dfs_cac_cancel(local); 3286 rtnl_unlock(); 3287 3288 if (num_chanctx > 1) 3289 /* XXX: multi-channel is not supported yet */ 3290 WARN_ON(1); 3291 else 3292 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3293 } 3294 3295 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3296 { 3297 struct ieee80211_local *local = hw_to_local(hw); 3298 3299 trace_api_radar_detected(local); 3300 3301 schedule_work(&local->radar_detected_work); 3302 } 3303 EXPORT_SYMBOL(ieee80211_radar_detected); 3304 3305 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3306 { 3307 u32 ret; 3308 int tmp; 3309 3310 switch (c->width) { 3311 case NL80211_CHAN_WIDTH_20: 3312 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3313 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3314 break; 3315 case NL80211_CHAN_WIDTH_40: 3316 c->width = NL80211_CHAN_WIDTH_20; 3317 c->center_freq1 = c->chan->center_freq; 3318 ret = IEEE80211_STA_DISABLE_40MHZ | 3319 IEEE80211_STA_DISABLE_VHT; 3320 break; 3321 case NL80211_CHAN_WIDTH_80: 3322 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3323 /* n_P40 */ 3324 tmp /= 2; 3325 /* freq_P40 */ 3326 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3327 c->width = NL80211_CHAN_WIDTH_40; 3328 ret = IEEE80211_STA_DISABLE_VHT; 3329 break; 3330 case NL80211_CHAN_WIDTH_80P80: 3331 c->center_freq2 = 0; 3332 c->width = NL80211_CHAN_WIDTH_80; 3333 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3334 IEEE80211_STA_DISABLE_160MHZ; 3335 break; 3336 case NL80211_CHAN_WIDTH_160: 3337 /* n_P20 */ 3338 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3339 /* n_P80 */ 3340 tmp /= 4; 3341 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3342 c->width = NL80211_CHAN_WIDTH_80; 3343 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3344 IEEE80211_STA_DISABLE_160MHZ; 3345 break; 3346 default: 3347 case NL80211_CHAN_WIDTH_20_NOHT: 3348 WARN_ON_ONCE(1); 3349 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3350 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3351 break; 3352 case NL80211_CHAN_WIDTH_5: 3353 case NL80211_CHAN_WIDTH_10: 3354 WARN_ON_ONCE(1); 3355 /* keep c->width */ 3356 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3357 break; 3358 } 3359 3360 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3361 3362 return ret; 3363 } 3364 3365 /* 3366 * Returns true if smps_mode_new is strictly more restrictive than 3367 * smps_mode_old. 3368 */ 3369 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3370 enum ieee80211_smps_mode smps_mode_new) 3371 { 3372 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3373 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3374 return false; 3375 3376 switch (smps_mode_old) { 3377 case IEEE80211_SMPS_STATIC: 3378 return false; 3379 case IEEE80211_SMPS_DYNAMIC: 3380 return smps_mode_new == IEEE80211_SMPS_STATIC; 3381 case IEEE80211_SMPS_OFF: 3382 return smps_mode_new != IEEE80211_SMPS_OFF; 3383 default: 3384 WARN_ON(1); 3385 } 3386 3387 return false; 3388 } 3389 3390 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3391 struct cfg80211_csa_settings *csa_settings) 3392 { 3393 struct sk_buff *skb; 3394 struct ieee80211_mgmt *mgmt; 3395 struct ieee80211_local *local = sdata->local; 3396 int freq; 3397 int hdr_len = offsetofend(struct ieee80211_mgmt, 3398 u.action.u.chan_switch); 3399 u8 *pos; 3400 3401 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3402 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3403 return -EOPNOTSUPP; 3404 3405 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3406 5 + /* channel switch announcement element */ 3407 3 + /* secondary channel offset element */ 3408 5 + /* wide bandwidth channel switch announcement */ 3409 8); /* mesh channel switch parameters element */ 3410 if (!skb) 3411 return -ENOMEM; 3412 3413 skb_reserve(skb, local->tx_headroom); 3414 mgmt = skb_put_zero(skb, hdr_len); 3415 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3416 IEEE80211_STYPE_ACTION); 3417 3418 eth_broadcast_addr(mgmt->da); 3419 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3420 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3421 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3422 } else { 3423 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3424 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3425 } 3426 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3427 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3428 pos = skb_put(skb, 5); 3429 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3430 *pos++ = 3; /* IE length */ 3431 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3432 freq = csa_settings->chandef.chan->center_freq; 3433 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3434 *pos++ = csa_settings->count; /* count */ 3435 3436 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3437 enum nl80211_channel_type ch_type; 3438 3439 skb_put(skb, 3); 3440 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3441 *pos++ = 1; /* IE length */ 3442 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3443 if (ch_type == NL80211_CHAN_HT40PLUS) 3444 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3445 else 3446 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3447 } 3448 3449 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3450 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3451 3452 skb_put(skb, 8); 3453 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3454 *pos++ = 6; /* IE length */ 3455 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3456 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3457 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3458 *pos++ |= csa_settings->block_tx ? 3459 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3460 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3461 pos += 2; 3462 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3463 pos += 2; 3464 } 3465 3466 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3467 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3468 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3469 skb_put(skb, 5); 3470 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3471 } 3472 3473 ieee80211_tx_skb(sdata, skb); 3474 return 0; 3475 } 3476 3477 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3478 { 3479 return !(cs == NULL || cs->cipher == 0 || 3480 cs->hdr_len < cs->pn_len + cs->pn_off || 3481 cs->hdr_len <= cs->key_idx_off || 3482 cs->key_idx_shift > 7 || 3483 cs->key_idx_mask == 0); 3484 } 3485 3486 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3487 { 3488 int i; 3489 3490 /* Ensure we have enough iftype bitmap space for all iftype values */ 3491 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3492 3493 for (i = 0; i < n; i++) 3494 if (!ieee80211_cs_valid(&cs[i])) 3495 return false; 3496 3497 return true; 3498 } 3499 3500 const struct ieee80211_cipher_scheme * 3501 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3502 enum nl80211_iftype iftype) 3503 { 3504 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3505 int n = local->hw.n_cipher_schemes; 3506 int i; 3507 const struct ieee80211_cipher_scheme *cs = NULL; 3508 3509 for (i = 0; i < n; i++) { 3510 if (l[i].cipher == cipher) { 3511 cs = &l[i]; 3512 break; 3513 } 3514 } 3515 3516 if (!cs || !(cs->iftype & BIT(iftype))) 3517 return NULL; 3518 3519 return cs; 3520 } 3521 3522 int ieee80211_cs_headroom(struct ieee80211_local *local, 3523 struct cfg80211_crypto_settings *crypto, 3524 enum nl80211_iftype iftype) 3525 { 3526 const struct ieee80211_cipher_scheme *cs; 3527 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3528 int i; 3529 3530 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3531 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3532 iftype); 3533 3534 if (cs && headroom < cs->hdr_len) 3535 headroom = cs->hdr_len; 3536 } 3537 3538 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3539 if (cs && headroom < cs->hdr_len) 3540 headroom = cs->hdr_len; 3541 3542 return headroom; 3543 } 3544 3545 static bool 3546 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3547 { 3548 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3549 int skip; 3550 3551 if (end > 0) 3552 return false; 3553 3554 /* One shot NOA */ 3555 if (data->count[i] == 1) 3556 return false; 3557 3558 if (data->desc[i].interval == 0) 3559 return false; 3560 3561 /* End time is in the past, check for repetitions */ 3562 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3563 if (data->count[i] < 255) { 3564 if (data->count[i] <= skip) { 3565 data->count[i] = 0; 3566 return false; 3567 } 3568 3569 data->count[i] -= skip; 3570 } 3571 3572 data->desc[i].start += skip * data->desc[i].interval; 3573 3574 return true; 3575 } 3576 3577 static bool 3578 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3579 s32 *offset) 3580 { 3581 bool ret = false; 3582 int i; 3583 3584 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3585 s32 cur; 3586 3587 if (!data->count[i]) 3588 continue; 3589 3590 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3591 ret = true; 3592 3593 cur = data->desc[i].start - tsf; 3594 if (cur > *offset) 3595 continue; 3596 3597 cur = data->desc[i].start + data->desc[i].duration - tsf; 3598 if (cur > *offset) 3599 *offset = cur; 3600 } 3601 3602 return ret; 3603 } 3604 3605 static u32 3606 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3607 { 3608 s32 offset = 0; 3609 int tries = 0; 3610 /* 3611 * arbitrary limit, used to avoid infinite loops when combined NoA 3612 * descriptors cover the full time period. 3613 */ 3614 int max_tries = 5; 3615 3616 ieee80211_extend_absent_time(data, tsf, &offset); 3617 do { 3618 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3619 break; 3620 3621 tries++; 3622 } while (tries < max_tries); 3623 3624 return offset; 3625 } 3626 3627 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3628 { 3629 u32 next_offset = BIT(31) - 1; 3630 int i; 3631 3632 data->absent = 0; 3633 data->has_next_tsf = false; 3634 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3635 s32 start; 3636 3637 if (!data->count[i]) 3638 continue; 3639 3640 ieee80211_extend_noa_desc(data, tsf, i); 3641 start = data->desc[i].start - tsf; 3642 if (start <= 0) 3643 data->absent |= BIT(i); 3644 3645 if (next_offset > start) 3646 next_offset = start; 3647 3648 data->has_next_tsf = true; 3649 } 3650 3651 if (data->absent) 3652 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3653 3654 data->next_tsf = tsf + next_offset; 3655 } 3656 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3657 3658 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3659 struct ieee80211_noa_data *data, u32 tsf) 3660 { 3661 int ret = 0; 3662 int i; 3663 3664 memset(data, 0, sizeof(*data)); 3665 3666 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3667 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3668 3669 if (!desc->count || !desc->duration) 3670 continue; 3671 3672 data->count[i] = desc->count; 3673 data->desc[i].start = le32_to_cpu(desc->start_time); 3674 data->desc[i].duration = le32_to_cpu(desc->duration); 3675 data->desc[i].interval = le32_to_cpu(desc->interval); 3676 3677 if (data->count[i] > 1 && 3678 data->desc[i].interval < data->desc[i].duration) 3679 continue; 3680 3681 ieee80211_extend_noa_desc(data, tsf, i); 3682 ret++; 3683 } 3684 3685 if (ret) 3686 ieee80211_update_p2p_noa(data, tsf); 3687 3688 return ret; 3689 } 3690 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3691 3692 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3693 struct ieee80211_sub_if_data *sdata) 3694 { 3695 u64 tsf = drv_get_tsf(local, sdata); 3696 u64 dtim_count = 0; 3697 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3698 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3699 struct ps_data *ps; 3700 u8 bcns_from_dtim; 3701 3702 if (tsf == -1ULL || !beacon_int || !dtim_period) 3703 return; 3704 3705 if (sdata->vif.type == NL80211_IFTYPE_AP || 3706 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3707 if (!sdata->bss) 3708 return; 3709 3710 ps = &sdata->bss->ps; 3711 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3712 ps = &sdata->u.mesh.ps; 3713 } else { 3714 return; 3715 } 3716 3717 /* 3718 * actually finds last dtim_count, mac80211 will update in 3719 * __beacon_add_tim(). 3720 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3721 */ 3722 do_div(tsf, beacon_int); 3723 bcns_from_dtim = do_div(tsf, dtim_period); 3724 /* just had a DTIM */ 3725 if (!bcns_from_dtim) 3726 dtim_count = 0; 3727 else 3728 dtim_count = dtim_period - bcns_from_dtim; 3729 3730 ps->dtim_count = dtim_count; 3731 } 3732 3733 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3734 struct ieee80211_chanctx *ctx) 3735 { 3736 struct ieee80211_sub_if_data *sdata; 3737 u8 radar_detect = 0; 3738 3739 lockdep_assert_held(&local->chanctx_mtx); 3740 3741 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3742 return 0; 3743 3744 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3745 if (sdata->reserved_radar_required) 3746 radar_detect |= BIT(sdata->reserved_chandef.width); 3747 3748 /* 3749 * An in-place reservation context should not have any assigned vifs 3750 * until it replaces the other context. 3751 */ 3752 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3753 !list_empty(&ctx->assigned_vifs)); 3754 3755 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3756 if (sdata->radar_required) 3757 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3758 3759 return radar_detect; 3760 } 3761 3762 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3763 const struct cfg80211_chan_def *chandef, 3764 enum ieee80211_chanctx_mode chanmode, 3765 u8 radar_detect) 3766 { 3767 struct ieee80211_local *local = sdata->local; 3768 struct ieee80211_sub_if_data *sdata_iter; 3769 enum nl80211_iftype iftype = sdata->wdev.iftype; 3770 struct ieee80211_chanctx *ctx; 3771 int total = 1; 3772 struct iface_combination_params params = { 3773 .radar_detect = radar_detect, 3774 }; 3775 3776 lockdep_assert_held(&local->chanctx_mtx); 3777 3778 if (WARN_ON(hweight32(radar_detect) > 1)) 3779 return -EINVAL; 3780 3781 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3782 !chandef->chan)) 3783 return -EINVAL; 3784 3785 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3786 return -EINVAL; 3787 3788 if (sdata->vif.type == NL80211_IFTYPE_AP || 3789 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3790 /* 3791 * always passing this is harmless, since it'll be the 3792 * same value that cfg80211 finds if it finds the same 3793 * interface ... and that's always allowed 3794 */ 3795 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3796 } 3797 3798 /* Always allow software iftypes */ 3799 if (local->hw.wiphy->software_iftypes & BIT(iftype) || 3800 (iftype == NL80211_IFTYPE_AP_VLAN && 3801 local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) { 3802 if (radar_detect) 3803 return -EINVAL; 3804 return 0; 3805 } 3806 3807 if (chandef) 3808 params.num_different_channels = 1; 3809 3810 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3811 params.iftype_num[iftype] = 1; 3812 3813 list_for_each_entry(ctx, &local->chanctx_list, list) { 3814 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3815 continue; 3816 params.radar_detect |= 3817 ieee80211_chanctx_radar_detect(local, ctx); 3818 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3819 params.num_different_channels++; 3820 continue; 3821 } 3822 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3823 cfg80211_chandef_compatible(chandef, 3824 &ctx->conf.def)) 3825 continue; 3826 params.num_different_channels++; 3827 } 3828 3829 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3830 struct wireless_dev *wdev_iter; 3831 3832 wdev_iter = &sdata_iter->wdev; 3833 3834 if (sdata_iter == sdata || 3835 !ieee80211_sdata_running(sdata_iter) || 3836 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3837 continue; 3838 3839 params.iftype_num[wdev_iter->iftype]++; 3840 total++; 3841 } 3842 3843 if (total == 1 && !params.radar_detect) 3844 return 0; 3845 3846 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3847 } 3848 3849 static void 3850 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3851 void *data) 3852 { 3853 u32 *max_num_different_channels = data; 3854 3855 *max_num_different_channels = max(*max_num_different_channels, 3856 c->num_different_channels); 3857 } 3858 3859 int ieee80211_max_num_channels(struct ieee80211_local *local) 3860 { 3861 struct ieee80211_sub_if_data *sdata; 3862 struct ieee80211_chanctx *ctx; 3863 u32 max_num_different_channels = 1; 3864 int err; 3865 struct iface_combination_params params = {0}; 3866 3867 lockdep_assert_held(&local->chanctx_mtx); 3868 3869 list_for_each_entry(ctx, &local->chanctx_list, list) { 3870 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3871 continue; 3872 3873 params.num_different_channels++; 3874 3875 params.radar_detect |= 3876 ieee80211_chanctx_radar_detect(local, ctx); 3877 } 3878 3879 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3880 params.iftype_num[sdata->wdev.iftype]++; 3881 3882 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3883 ieee80211_iter_max_chans, 3884 &max_num_different_channels); 3885 if (err < 0) 3886 return err; 3887 3888 return max_num_different_channels; 3889 } 3890 3891 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3892 { 3893 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3894 *buf++ = 7; /* len */ 3895 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3896 *buf++ = 0x50; 3897 *buf++ = 0xf2; 3898 *buf++ = 2; /* WME */ 3899 *buf++ = 0; /* WME info */ 3900 *buf++ = 1; /* WME ver */ 3901 *buf++ = qosinfo; /* U-APSD no in use */ 3902 3903 return buf; 3904 } 3905 3906 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3907 unsigned long *frame_cnt, 3908 unsigned long *byte_cnt) 3909 { 3910 struct txq_info *txqi = to_txq_info(txq); 3911 u32 frag_cnt = 0, frag_bytes = 0; 3912 struct sk_buff *skb; 3913 3914 skb_queue_walk(&txqi->frags, skb) { 3915 frag_cnt++; 3916 frag_bytes += skb->len; 3917 } 3918 3919 if (frame_cnt) 3920 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3921 3922 if (byte_cnt) 3923 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3924 } 3925 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3926 3927 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3928 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3929 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3930 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3931 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3932 }; 3933