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