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 Intel Deutschland GmbH 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * utilities for mac80211 14 */ 15 16 #include <net/mac80211.h> 17 #include <linux/netdevice.h> 18 #include <linux/export.h> 19 #include <linux/types.h> 20 #include <linux/slab.h> 21 #include <linux/skbuff.h> 22 #include <linux/etherdevice.h> 23 #include <linux/if_arp.h> 24 #include <linux/bitmap.h> 25 #include <linux/crc32.h> 26 #include <net/net_namespace.h> 27 #include <net/cfg80211.h> 28 #include <net/rtnetlink.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "mesh.h" 34 #include "wme.h" 35 #include "led.h" 36 #include "wep.h" 37 38 /* privid for wiphys to determine whether they belong to us or not */ 39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 40 41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 42 { 43 struct ieee80211_local *local; 44 BUG_ON(!wiphy); 45 46 local = wiphy_priv(wiphy); 47 return &local->hw; 48 } 49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 50 51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 52 { 53 struct sk_buff *skb; 54 struct ieee80211_hdr *hdr; 55 56 skb_queue_walk(&tx->skbs, skb) { 57 hdr = (struct ieee80211_hdr *) skb->data; 58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 59 } 60 } 61 62 int ieee80211_frame_duration(enum ieee80211_band band, size_t len, 63 int rate, int erp, int short_preamble, 64 int shift) 65 { 66 int dur; 67 68 /* calculate duration (in microseconds, rounded up to next higher 69 * integer if it includes a fractional microsecond) to send frame of 70 * len bytes (does not include FCS) at the given rate. Duration will 71 * also include SIFS. 72 * 73 * rate is in 100 kbps, so divident is multiplied by 10 in the 74 * DIV_ROUND_UP() operations. 75 * 76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 77 * is assumed to be 0 otherwise. 78 */ 79 80 if (band == IEEE80211_BAND_5GHZ || erp) { 81 /* 82 * OFDM: 83 * 84 * N_DBPS = DATARATE x 4 85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 86 * (16 = SIGNAL time, 6 = tail bits) 87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 88 * 89 * T_SYM = 4 usec 90 * 802.11a - 18.5.2: aSIFSTime = 16 usec 91 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 92 * signal ext = 6 usec 93 */ 94 dur = 16; /* SIFS + signal ext */ 95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 97 98 /* IEEE 802.11-2012 18.3.2.4: all values above are: 99 * * times 4 for 5 MHz 100 * * times 2 for 10 MHz 101 */ 102 dur *= 1 << shift; 103 104 /* rates should already consider the channel bandwidth, 105 * don't apply divisor again. 106 */ 107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 108 4 * rate); /* T_SYM x N_SYM */ 109 } else { 110 /* 111 * 802.11b or 802.11g with 802.11b compatibility: 112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 114 * 115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 116 * aSIFSTime = 10 usec 117 * aPreambleLength = 144 usec or 72 usec with short preamble 118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 119 */ 120 dur = 10; /* aSIFSTime = 10 usec */ 121 dur += short_preamble ? (72 + 24) : (144 + 48); 122 123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 124 } 125 126 return dur; 127 } 128 129 /* Exported duration function for driver use */ 130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 131 struct ieee80211_vif *vif, 132 enum ieee80211_band band, 133 size_t frame_len, 134 struct ieee80211_rate *rate) 135 { 136 struct ieee80211_sub_if_data *sdata; 137 u16 dur; 138 int erp, shift = 0; 139 bool short_preamble = false; 140 141 erp = 0; 142 if (vif) { 143 sdata = vif_to_sdata(vif); 144 short_preamble = sdata->vif.bss_conf.use_short_preamble; 145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 146 erp = rate->flags & IEEE80211_RATE_ERP_G; 147 shift = ieee80211_vif_get_shift(vif); 148 } 149 150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 151 short_preamble, shift); 152 153 return cpu_to_le16(dur); 154 } 155 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 156 157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 158 struct ieee80211_vif *vif, size_t frame_len, 159 const struct ieee80211_tx_info *frame_txctl) 160 { 161 struct ieee80211_local *local = hw_to_local(hw); 162 struct ieee80211_rate *rate; 163 struct ieee80211_sub_if_data *sdata; 164 bool short_preamble; 165 int erp, shift = 0, bitrate; 166 u16 dur; 167 struct ieee80211_supported_band *sband; 168 169 sband = local->hw.wiphy->bands[frame_txctl->band]; 170 171 short_preamble = false; 172 173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 174 175 erp = 0; 176 if (vif) { 177 sdata = vif_to_sdata(vif); 178 short_preamble = sdata->vif.bss_conf.use_short_preamble; 179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 180 erp = rate->flags & IEEE80211_RATE_ERP_G; 181 shift = ieee80211_vif_get_shift(vif); 182 } 183 184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 185 186 /* CTS duration */ 187 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 188 erp, short_preamble, shift); 189 /* Data frame duration */ 190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 191 erp, short_preamble, shift); 192 /* ACK duration */ 193 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 194 erp, short_preamble, shift); 195 196 return cpu_to_le16(dur); 197 } 198 EXPORT_SYMBOL(ieee80211_rts_duration); 199 200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 201 struct ieee80211_vif *vif, 202 size_t frame_len, 203 const struct ieee80211_tx_info *frame_txctl) 204 { 205 struct ieee80211_local *local = hw_to_local(hw); 206 struct ieee80211_rate *rate; 207 struct ieee80211_sub_if_data *sdata; 208 bool short_preamble; 209 int erp, shift = 0, bitrate; 210 u16 dur; 211 struct ieee80211_supported_band *sband; 212 213 sband = local->hw.wiphy->bands[frame_txctl->band]; 214 215 short_preamble = false; 216 217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 218 erp = 0; 219 if (vif) { 220 sdata = vif_to_sdata(vif); 221 short_preamble = sdata->vif.bss_conf.use_short_preamble; 222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 223 erp = rate->flags & IEEE80211_RATE_ERP_G; 224 shift = ieee80211_vif_get_shift(vif); 225 } 226 227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 228 229 /* Data frame duration */ 230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 231 erp, short_preamble, shift); 232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 233 /* ACK duration */ 234 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 235 erp, short_preamble, shift); 236 } 237 238 return cpu_to_le16(dur); 239 } 240 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 241 242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 243 { 244 struct ieee80211_sub_if_data *sdata; 245 int n_acs = IEEE80211_NUM_ACS; 246 247 if (local->hw.queues < IEEE80211_NUM_ACS) 248 n_acs = 1; 249 250 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 251 int ac; 252 253 if (!sdata->dev) 254 continue; 255 256 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 257 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 258 continue; 259 260 for (ac = 0; ac < n_acs; ac++) { 261 int ac_queue = sdata->vif.hw_queue[ac]; 262 263 if (local->ops->wake_tx_queue && 264 (atomic_read(&sdata->txqs_len[ac]) > 265 local->hw.txq_ac_max_pending)) 266 continue; 267 268 if (ac_queue == queue || 269 (sdata->vif.cab_queue == queue && 270 local->queue_stop_reasons[ac_queue] == 0 && 271 skb_queue_empty(&local->pending[ac_queue]))) 272 netif_wake_subqueue(sdata->dev, ac); 273 } 274 } 275 } 276 277 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 278 enum queue_stop_reason reason, 279 bool refcounted) 280 { 281 struct ieee80211_local *local = hw_to_local(hw); 282 283 trace_wake_queue(local, queue, reason); 284 285 if (WARN_ON(queue >= hw->queues)) 286 return; 287 288 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 289 return; 290 291 if (!refcounted) 292 local->q_stop_reasons[queue][reason] = 0; 293 else 294 local->q_stop_reasons[queue][reason]--; 295 296 if (local->q_stop_reasons[queue][reason] == 0) 297 __clear_bit(reason, &local->queue_stop_reasons[queue]); 298 299 if (local->queue_stop_reasons[queue] != 0) 300 /* someone still has this queue stopped */ 301 return; 302 303 if (skb_queue_empty(&local->pending[queue])) { 304 rcu_read_lock(); 305 ieee80211_propagate_queue_wake(local, queue); 306 rcu_read_unlock(); 307 } else 308 tasklet_schedule(&local->tx_pending_tasklet); 309 } 310 311 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 312 enum queue_stop_reason reason, 313 bool refcounted) 314 { 315 struct ieee80211_local *local = hw_to_local(hw); 316 unsigned long flags; 317 318 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 319 __ieee80211_wake_queue(hw, queue, reason, refcounted); 320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 321 } 322 323 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 324 { 325 ieee80211_wake_queue_by_reason(hw, queue, 326 IEEE80211_QUEUE_STOP_REASON_DRIVER, 327 false); 328 } 329 EXPORT_SYMBOL(ieee80211_wake_queue); 330 331 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 332 enum queue_stop_reason reason, 333 bool refcounted) 334 { 335 struct ieee80211_local *local = hw_to_local(hw); 336 struct ieee80211_sub_if_data *sdata; 337 int n_acs = IEEE80211_NUM_ACS; 338 339 trace_stop_queue(local, queue, reason); 340 341 if (WARN_ON(queue >= hw->queues)) 342 return; 343 344 if (!refcounted) 345 local->q_stop_reasons[queue][reason] = 1; 346 else 347 local->q_stop_reasons[queue][reason]++; 348 349 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 350 return; 351 352 if (local->hw.queues < IEEE80211_NUM_ACS) 353 n_acs = 1; 354 355 rcu_read_lock(); 356 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 357 int ac; 358 359 if (!sdata->dev) 360 continue; 361 362 for (ac = 0; ac < n_acs; ac++) { 363 if (sdata->vif.hw_queue[ac] == queue || 364 sdata->vif.cab_queue == queue) 365 netif_stop_subqueue(sdata->dev, ac); 366 } 367 } 368 rcu_read_unlock(); 369 } 370 371 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 372 enum queue_stop_reason reason, 373 bool refcounted) 374 { 375 struct ieee80211_local *local = hw_to_local(hw); 376 unsigned long flags; 377 378 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 379 __ieee80211_stop_queue(hw, queue, reason, refcounted); 380 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 381 } 382 383 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 384 { 385 ieee80211_stop_queue_by_reason(hw, queue, 386 IEEE80211_QUEUE_STOP_REASON_DRIVER, 387 false); 388 } 389 EXPORT_SYMBOL(ieee80211_stop_queue); 390 391 void ieee80211_add_pending_skb(struct ieee80211_local *local, 392 struct sk_buff *skb) 393 { 394 struct ieee80211_hw *hw = &local->hw; 395 unsigned long flags; 396 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 397 int queue = info->hw_queue; 398 399 if (WARN_ON(!info->control.vif)) { 400 ieee80211_free_txskb(&local->hw, skb); 401 return; 402 } 403 404 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 405 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 406 false); 407 __skb_queue_tail(&local->pending[queue], skb); 408 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 409 false); 410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 411 } 412 413 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 414 struct sk_buff_head *skbs) 415 { 416 struct ieee80211_hw *hw = &local->hw; 417 struct sk_buff *skb; 418 unsigned long flags; 419 int queue, i; 420 421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 422 while ((skb = skb_dequeue(skbs))) { 423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 424 425 if (WARN_ON(!info->control.vif)) { 426 ieee80211_free_txskb(&local->hw, skb); 427 continue; 428 } 429 430 queue = info->hw_queue; 431 432 __ieee80211_stop_queue(hw, queue, 433 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 434 false); 435 436 __skb_queue_tail(&local->pending[queue], skb); 437 } 438 439 for (i = 0; i < hw->queues; i++) 440 __ieee80211_wake_queue(hw, i, 441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 442 false); 443 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 444 } 445 446 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 447 unsigned long queues, 448 enum queue_stop_reason reason, 449 bool refcounted) 450 { 451 struct ieee80211_local *local = hw_to_local(hw); 452 unsigned long flags; 453 int i; 454 455 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 456 457 for_each_set_bit(i, &queues, hw->queues) 458 __ieee80211_stop_queue(hw, i, reason, refcounted); 459 460 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 461 } 462 463 void ieee80211_stop_queues(struct ieee80211_hw *hw) 464 { 465 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 466 IEEE80211_QUEUE_STOP_REASON_DRIVER, 467 false); 468 } 469 EXPORT_SYMBOL(ieee80211_stop_queues); 470 471 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 472 { 473 struct ieee80211_local *local = hw_to_local(hw); 474 unsigned long flags; 475 int ret; 476 477 if (WARN_ON(queue >= hw->queues)) 478 return true; 479 480 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 481 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 482 &local->queue_stop_reasons[queue]); 483 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 484 return ret; 485 } 486 EXPORT_SYMBOL(ieee80211_queue_stopped); 487 488 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 489 unsigned long queues, 490 enum queue_stop_reason reason, 491 bool refcounted) 492 { 493 struct ieee80211_local *local = hw_to_local(hw); 494 unsigned long flags; 495 int i; 496 497 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 498 499 for_each_set_bit(i, &queues, hw->queues) 500 __ieee80211_wake_queue(hw, i, reason, refcounted); 501 502 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 503 } 504 505 void ieee80211_wake_queues(struct ieee80211_hw *hw) 506 { 507 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 508 IEEE80211_QUEUE_STOP_REASON_DRIVER, 509 false); 510 } 511 EXPORT_SYMBOL(ieee80211_wake_queues); 512 513 static unsigned int 514 ieee80211_get_vif_queues(struct ieee80211_local *local, 515 struct ieee80211_sub_if_data *sdata) 516 { 517 unsigned int queues; 518 519 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 520 int ac; 521 522 queues = 0; 523 524 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 525 queues |= BIT(sdata->vif.hw_queue[ac]); 526 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 527 queues |= BIT(sdata->vif.cab_queue); 528 } else { 529 /* all queues */ 530 queues = BIT(local->hw.queues) - 1; 531 } 532 533 return queues; 534 } 535 536 void __ieee80211_flush_queues(struct ieee80211_local *local, 537 struct ieee80211_sub_if_data *sdata, 538 unsigned int queues, bool drop) 539 { 540 if (!local->ops->flush) 541 return; 542 543 /* 544 * If no queue was set, or if the HW doesn't support 545 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 546 */ 547 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 548 queues = ieee80211_get_vif_queues(local, sdata); 549 550 ieee80211_stop_queues_by_reason(&local->hw, queues, 551 IEEE80211_QUEUE_STOP_REASON_FLUSH, 552 false); 553 554 drv_flush(local, sdata, queues, drop); 555 556 ieee80211_wake_queues_by_reason(&local->hw, queues, 557 IEEE80211_QUEUE_STOP_REASON_FLUSH, 558 false); 559 } 560 561 void ieee80211_flush_queues(struct ieee80211_local *local, 562 struct ieee80211_sub_if_data *sdata, bool drop) 563 { 564 __ieee80211_flush_queues(local, sdata, 0, drop); 565 } 566 567 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 568 struct ieee80211_sub_if_data *sdata, 569 enum queue_stop_reason reason) 570 { 571 ieee80211_stop_queues_by_reason(&local->hw, 572 ieee80211_get_vif_queues(local, sdata), 573 reason, true); 574 } 575 576 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 577 struct ieee80211_sub_if_data *sdata, 578 enum queue_stop_reason reason) 579 { 580 ieee80211_wake_queues_by_reason(&local->hw, 581 ieee80211_get_vif_queues(local, sdata), 582 reason, true); 583 } 584 585 static void __iterate_interfaces(struct ieee80211_local *local, 586 u32 iter_flags, 587 void (*iterator)(void *data, u8 *mac, 588 struct ieee80211_vif *vif), 589 void *data) 590 { 591 struct ieee80211_sub_if_data *sdata; 592 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 593 594 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 595 switch (sdata->vif.type) { 596 case NL80211_IFTYPE_MONITOR: 597 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE)) 598 continue; 599 break; 600 case NL80211_IFTYPE_AP_VLAN: 601 continue; 602 default: 603 break; 604 } 605 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 606 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 607 continue; 608 if (ieee80211_sdata_running(sdata) || !active_only) 609 iterator(data, sdata->vif.addr, 610 &sdata->vif); 611 } 612 613 sdata = rcu_dereference_check(local->monitor_sdata, 614 lockdep_is_held(&local->iflist_mtx) || 615 lockdep_rtnl_is_held()); 616 if (sdata && 617 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 618 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 619 iterator(data, sdata->vif.addr, &sdata->vif); 620 } 621 622 void ieee80211_iterate_interfaces( 623 struct ieee80211_hw *hw, u32 iter_flags, 624 void (*iterator)(void *data, u8 *mac, 625 struct ieee80211_vif *vif), 626 void *data) 627 { 628 struct ieee80211_local *local = hw_to_local(hw); 629 630 mutex_lock(&local->iflist_mtx); 631 __iterate_interfaces(local, iter_flags, iterator, data); 632 mutex_unlock(&local->iflist_mtx); 633 } 634 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 635 636 void ieee80211_iterate_active_interfaces_atomic( 637 struct ieee80211_hw *hw, u32 iter_flags, 638 void (*iterator)(void *data, u8 *mac, 639 struct ieee80211_vif *vif), 640 void *data) 641 { 642 struct ieee80211_local *local = hw_to_local(hw); 643 644 rcu_read_lock(); 645 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 646 iterator, data); 647 rcu_read_unlock(); 648 } 649 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 650 651 void ieee80211_iterate_active_interfaces_rtnl( 652 struct ieee80211_hw *hw, u32 iter_flags, 653 void (*iterator)(void *data, u8 *mac, 654 struct ieee80211_vif *vif), 655 void *data) 656 { 657 struct ieee80211_local *local = hw_to_local(hw); 658 659 ASSERT_RTNL(); 660 661 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 662 iterator, data); 663 } 664 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 665 666 static void __iterate_stations(struct ieee80211_local *local, 667 void (*iterator)(void *data, 668 struct ieee80211_sta *sta), 669 void *data) 670 { 671 struct sta_info *sta; 672 673 list_for_each_entry_rcu(sta, &local->sta_list, list) { 674 if (!sta->uploaded) 675 continue; 676 677 iterator(data, &sta->sta); 678 } 679 } 680 681 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 682 void (*iterator)(void *data, 683 struct ieee80211_sta *sta), 684 void *data) 685 { 686 struct ieee80211_local *local = hw_to_local(hw); 687 688 rcu_read_lock(); 689 __iterate_stations(local, iterator, data); 690 rcu_read_unlock(); 691 } 692 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 693 694 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 695 { 696 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 697 698 if (!ieee80211_sdata_running(sdata) || 699 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 700 return NULL; 701 return &sdata->vif; 702 } 703 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 704 705 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 706 { 707 struct ieee80211_sub_if_data *sdata; 708 709 if (!vif) 710 return NULL; 711 712 sdata = vif_to_sdata(vif); 713 714 if (!ieee80211_sdata_running(sdata) || 715 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 716 return NULL; 717 718 return &sdata->wdev; 719 } 720 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 721 722 /* 723 * Nothing should have been stuffed into the workqueue during 724 * the suspend->resume cycle. Since we can't check each caller 725 * of this function if we are already quiescing / suspended, 726 * check here and don't WARN since this can actually happen when 727 * the rx path (for example) is racing against __ieee80211_suspend 728 * and suspending / quiescing was set after the rx path checked 729 * them. 730 */ 731 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 732 { 733 if (local->quiescing || (local->suspended && !local->resuming)) { 734 pr_warn("queueing ieee80211 work while going to suspend\n"); 735 return false; 736 } 737 738 return true; 739 } 740 741 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 742 { 743 struct ieee80211_local *local = hw_to_local(hw); 744 745 if (!ieee80211_can_queue_work(local)) 746 return; 747 748 queue_work(local->workqueue, work); 749 } 750 EXPORT_SYMBOL(ieee80211_queue_work); 751 752 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 753 struct delayed_work *dwork, 754 unsigned long delay) 755 { 756 struct ieee80211_local *local = hw_to_local(hw); 757 758 if (!ieee80211_can_queue_work(local)) 759 return; 760 761 queue_delayed_work(local->workqueue, dwork, delay); 762 } 763 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 764 765 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 766 struct ieee802_11_elems *elems, 767 u64 filter, u32 crc) 768 { 769 size_t left = len; 770 const u8 *pos = start; 771 bool calc_crc = filter != 0; 772 DECLARE_BITMAP(seen_elems, 256); 773 const u8 *ie; 774 775 bitmap_zero(seen_elems, 256); 776 memset(elems, 0, sizeof(*elems)); 777 elems->ie_start = start; 778 elems->total_len = len; 779 780 while (left >= 2) { 781 u8 id, elen; 782 bool elem_parse_failed; 783 784 id = *pos++; 785 elen = *pos++; 786 left -= 2; 787 788 if (elen > left) { 789 elems->parse_error = true; 790 break; 791 } 792 793 switch (id) { 794 case WLAN_EID_SSID: 795 case WLAN_EID_SUPP_RATES: 796 case WLAN_EID_FH_PARAMS: 797 case WLAN_EID_DS_PARAMS: 798 case WLAN_EID_CF_PARAMS: 799 case WLAN_EID_TIM: 800 case WLAN_EID_IBSS_PARAMS: 801 case WLAN_EID_CHALLENGE: 802 case WLAN_EID_RSN: 803 case WLAN_EID_ERP_INFO: 804 case WLAN_EID_EXT_SUPP_RATES: 805 case WLAN_EID_HT_CAPABILITY: 806 case WLAN_EID_HT_OPERATION: 807 case WLAN_EID_VHT_CAPABILITY: 808 case WLAN_EID_VHT_OPERATION: 809 case WLAN_EID_MESH_ID: 810 case WLAN_EID_MESH_CONFIG: 811 case WLAN_EID_PEER_MGMT: 812 case WLAN_EID_PREQ: 813 case WLAN_EID_PREP: 814 case WLAN_EID_PERR: 815 case WLAN_EID_RANN: 816 case WLAN_EID_CHANNEL_SWITCH: 817 case WLAN_EID_EXT_CHANSWITCH_ANN: 818 case WLAN_EID_COUNTRY: 819 case WLAN_EID_PWR_CONSTRAINT: 820 case WLAN_EID_TIMEOUT_INTERVAL: 821 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 822 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 823 case WLAN_EID_CHAN_SWITCH_PARAM: 824 case WLAN_EID_EXT_CAPABILITY: 825 case WLAN_EID_CHAN_SWITCH_TIMING: 826 case WLAN_EID_LINK_ID: 827 /* 828 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 829 * that if the content gets bigger it might be needed more than once 830 */ 831 if (test_bit(id, seen_elems)) { 832 elems->parse_error = true; 833 left -= elen; 834 pos += elen; 835 continue; 836 } 837 break; 838 } 839 840 if (calc_crc && id < 64 && (filter & (1ULL << id))) 841 crc = crc32_be(crc, pos - 2, elen + 2); 842 843 elem_parse_failed = false; 844 845 switch (id) { 846 case WLAN_EID_LINK_ID: 847 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 848 elem_parse_failed = true; 849 break; 850 } 851 elems->lnk_id = (void *)(pos - 2); 852 break; 853 case WLAN_EID_CHAN_SWITCH_TIMING: 854 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 855 elem_parse_failed = true; 856 break; 857 } 858 elems->ch_sw_timing = (void *)pos; 859 break; 860 case WLAN_EID_EXT_CAPABILITY: 861 elems->ext_capab = pos; 862 elems->ext_capab_len = elen; 863 break; 864 case WLAN_EID_SSID: 865 elems->ssid = pos; 866 elems->ssid_len = elen; 867 break; 868 case WLAN_EID_SUPP_RATES: 869 elems->supp_rates = pos; 870 elems->supp_rates_len = elen; 871 break; 872 case WLAN_EID_DS_PARAMS: 873 if (elen >= 1) 874 elems->ds_params = pos; 875 else 876 elem_parse_failed = true; 877 break; 878 case WLAN_EID_TIM: 879 if (elen >= sizeof(struct ieee80211_tim_ie)) { 880 elems->tim = (void *)pos; 881 elems->tim_len = elen; 882 } else 883 elem_parse_failed = true; 884 break; 885 case WLAN_EID_CHALLENGE: 886 elems->challenge = pos; 887 elems->challenge_len = elen; 888 break; 889 case WLAN_EID_VENDOR_SPECIFIC: 890 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 891 pos[2] == 0xf2) { 892 /* Microsoft OUI (00:50:F2) */ 893 894 if (calc_crc) 895 crc = crc32_be(crc, pos - 2, elen + 2); 896 897 if (elen >= 5 && pos[3] == 2) { 898 /* OUI Type 2 - WMM IE */ 899 if (pos[4] == 0) { 900 elems->wmm_info = pos; 901 elems->wmm_info_len = elen; 902 } else if (pos[4] == 1) { 903 elems->wmm_param = pos; 904 elems->wmm_param_len = elen; 905 } 906 } 907 } 908 break; 909 case WLAN_EID_RSN: 910 elems->rsn = pos; 911 elems->rsn_len = elen; 912 break; 913 case WLAN_EID_ERP_INFO: 914 if (elen >= 1) 915 elems->erp_info = pos; 916 else 917 elem_parse_failed = true; 918 break; 919 case WLAN_EID_EXT_SUPP_RATES: 920 elems->ext_supp_rates = pos; 921 elems->ext_supp_rates_len = elen; 922 break; 923 case WLAN_EID_HT_CAPABILITY: 924 if (elen >= sizeof(struct ieee80211_ht_cap)) 925 elems->ht_cap_elem = (void *)pos; 926 else 927 elem_parse_failed = true; 928 break; 929 case WLAN_EID_HT_OPERATION: 930 if (elen >= sizeof(struct ieee80211_ht_operation)) 931 elems->ht_operation = (void *)pos; 932 else 933 elem_parse_failed = true; 934 break; 935 case WLAN_EID_VHT_CAPABILITY: 936 if (elen >= sizeof(struct ieee80211_vht_cap)) 937 elems->vht_cap_elem = (void *)pos; 938 else 939 elem_parse_failed = true; 940 break; 941 case WLAN_EID_VHT_OPERATION: 942 if (elen >= sizeof(struct ieee80211_vht_operation)) 943 elems->vht_operation = (void *)pos; 944 else 945 elem_parse_failed = true; 946 break; 947 case WLAN_EID_OPMODE_NOTIF: 948 if (elen > 0) 949 elems->opmode_notif = pos; 950 else 951 elem_parse_failed = true; 952 break; 953 case WLAN_EID_MESH_ID: 954 elems->mesh_id = pos; 955 elems->mesh_id_len = elen; 956 break; 957 case WLAN_EID_MESH_CONFIG: 958 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 959 elems->mesh_config = (void *)pos; 960 else 961 elem_parse_failed = true; 962 break; 963 case WLAN_EID_PEER_MGMT: 964 elems->peering = pos; 965 elems->peering_len = elen; 966 break; 967 case WLAN_EID_MESH_AWAKE_WINDOW: 968 if (elen >= 2) 969 elems->awake_window = (void *)pos; 970 break; 971 case WLAN_EID_PREQ: 972 elems->preq = pos; 973 elems->preq_len = elen; 974 break; 975 case WLAN_EID_PREP: 976 elems->prep = pos; 977 elems->prep_len = elen; 978 break; 979 case WLAN_EID_PERR: 980 elems->perr = pos; 981 elems->perr_len = elen; 982 break; 983 case WLAN_EID_RANN: 984 if (elen >= sizeof(struct ieee80211_rann_ie)) 985 elems->rann = (void *)pos; 986 else 987 elem_parse_failed = true; 988 break; 989 case WLAN_EID_CHANNEL_SWITCH: 990 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 991 elem_parse_failed = true; 992 break; 993 } 994 elems->ch_switch_ie = (void *)pos; 995 break; 996 case WLAN_EID_EXT_CHANSWITCH_ANN: 997 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 998 elem_parse_failed = true; 999 break; 1000 } 1001 elems->ext_chansw_ie = (void *)pos; 1002 break; 1003 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1004 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1005 elem_parse_failed = true; 1006 break; 1007 } 1008 elems->sec_chan_offs = (void *)pos; 1009 break; 1010 case WLAN_EID_CHAN_SWITCH_PARAM: 1011 if (elen != 1012 sizeof(*elems->mesh_chansw_params_ie)) { 1013 elem_parse_failed = true; 1014 break; 1015 } 1016 elems->mesh_chansw_params_ie = (void *)pos; 1017 break; 1018 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1019 if (!action || 1020 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1021 elem_parse_failed = true; 1022 break; 1023 } 1024 elems->wide_bw_chansw_ie = (void *)pos; 1025 break; 1026 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1027 if (action) { 1028 elem_parse_failed = true; 1029 break; 1030 } 1031 /* 1032 * This is a bit tricky, but as we only care about 1033 * the wide bandwidth channel switch element, so 1034 * just parse it out manually. 1035 */ 1036 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1037 pos, elen); 1038 if (ie) { 1039 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1040 elems->wide_bw_chansw_ie = 1041 (void *)(ie + 2); 1042 else 1043 elem_parse_failed = true; 1044 } 1045 break; 1046 case WLAN_EID_COUNTRY: 1047 elems->country_elem = pos; 1048 elems->country_elem_len = elen; 1049 break; 1050 case WLAN_EID_PWR_CONSTRAINT: 1051 if (elen != 1) { 1052 elem_parse_failed = true; 1053 break; 1054 } 1055 elems->pwr_constr_elem = pos; 1056 break; 1057 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1058 /* Lots of different options exist, but we only care 1059 * about the Dynamic Transmit Power Control element. 1060 * First check for the Cisco OUI, then for the DTPC 1061 * tag (0x00). 1062 */ 1063 if (elen < 4) { 1064 elem_parse_failed = true; 1065 break; 1066 } 1067 1068 if (pos[0] != 0x00 || pos[1] != 0x40 || 1069 pos[2] != 0x96 || pos[3] != 0x00) 1070 break; 1071 1072 if (elen != 6) { 1073 elem_parse_failed = true; 1074 break; 1075 } 1076 1077 if (calc_crc) 1078 crc = crc32_be(crc, pos - 2, elen + 2); 1079 1080 elems->cisco_dtpc_elem = pos; 1081 break; 1082 case WLAN_EID_TIMEOUT_INTERVAL: 1083 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1084 elems->timeout_int = (void *)pos; 1085 else 1086 elem_parse_failed = true; 1087 break; 1088 default: 1089 break; 1090 } 1091 1092 if (elem_parse_failed) 1093 elems->parse_error = true; 1094 else 1095 __set_bit(id, seen_elems); 1096 1097 left -= elen; 1098 pos += elen; 1099 } 1100 1101 if (left != 0) 1102 elems->parse_error = true; 1103 1104 return crc; 1105 } 1106 1107 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1108 bool bss_notify, bool enable_qos) 1109 { 1110 struct ieee80211_local *local = sdata->local; 1111 struct ieee80211_tx_queue_params qparam; 1112 struct ieee80211_chanctx_conf *chanctx_conf; 1113 int ac; 1114 bool use_11b; 1115 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1116 int aCWmin, aCWmax; 1117 1118 if (!local->ops->conf_tx) 1119 return; 1120 1121 if (local->hw.queues < IEEE80211_NUM_ACS) 1122 return; 1123 1124 memset(&qparam, 0, sizeof(qparam)); 1125 1126 rcu_read_lock(); 1127 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1128 use_11b = (chanctx_conf && 1129 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) && 1130 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1131 rcu_read_unlock(); 1132 1133 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1134 1135 /* Set defaults according to 802.11-2007 Table 7-37 */ 1136 aCWmax = 1023; 1137 if (use_11b) 1138 aCWmin = 31; 1139 else 1140 aCWmin = 15; 1141 1142 /* Confiure old 802.11b/g medium access rules. */ 1143 qparam.cw_max = aCWmax; 1144 qparam.cw_min = aCWmin; 1145 qparam.txop = 0; 1146 qparam.aifs = 2; 1147 1148 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1149 /* Update if QoS is enabled. */ 1150 if (enable_qos) { 1151 switch (ac) { 1152 case IEEE80211_AC_BK: 1153 qparam.cw_max = aCWmax; 1154 qparam.cw_min = aCWmin; 1155 qparam.txop = 0; 1156 if (is_ocb) 1157 qparam.aifs = 9; 1158 else 1159 qparam.aifs = 7; 1160 break; 1161 /* never happens but let's not leave undefined */ 1162 default: 1163 case IEEE80211_AC_BE: 1164 qparam.cw_max = aCWmax; 1165 qparam.cw_min = aCWmin; 1166 qparam.txop = 0; 1167 if (is_ocb) 1168 qparam.aifs = 6; 1169 else 1170 qparam.aifs = 3; 1171 break; 1172 case IEEE80211_AC_VI: 1173 qparam.cw_max = aCWmin; 1174 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1175 if (is_ocb) 1176 qparam.txop = 0; 1177 else if (use_11b) 1178 qparam.txop = 6016/32; 1179 else 1180 qparam.txop = 3008/32; 1181 1182 if (is_ocb) 1183 qparam.aifs = 3; 1184 else 1185 qparam.aifs = 2; 1186 break; 1187 case IEEE80211_AC_VO: 1188 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1189 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1190 if (is_ocb) 1191 qparam.txop = 0; 1192 else if (use_11b) 1193 qparam.txop = 3264/32; 1194 else 1195 qparam.txop = 1504/32; 1196 qparam.aifs = 2; 1197 break; 1198 } 1199 } 1200 1201 qparam.uapsd = false; 1202 1203 sdata->tx_conf[ac] = qparam; 1204 drv_conf_tx(local, sdata, ac, &qparam); 1205 } 1206 1207 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1208 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) { 1209 sdata->vif.bss_conf.qos = enable_qos; 1210 if (bss_notify) 1211 ieee80211_bss_info_change_notify(sdata, 1212 BSS_CHANGED_QOS); 1213 } 1214 } 1215 1216 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1217 u16 transaction, u16 auth_alg, u16 status, 1218 const u8 *extra, size_t extra_len, const u8 *da, 1219 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1220 u32 tx_flags) 1221 { 1222 struct ieee80211_local *local = sdata->local; 1223 struct sk_buff *skb; 1224 struct ieee80211_mgmt *mgmt; 1225 int err; 1226 1227 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1228 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1229 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1230 if (!skb) 1231 return; 1232 1233 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1234 1235 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6); 1236 memset(mgmt, 0, 24 + 6); 1237 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1238 IEEE80211_STYPE_AUTH); 1239 memcpy(mgmt->da, da, ETH_ALEN); 1240 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1241 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1242 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1243 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1244 mgmt->u.auth.status_code = cpu_to_le16(status); 1245 if (extra) 1246 memcpy(skb_put(skb, extra_len), extra, extra_len); 1247 1248 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1249 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1250 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1251 WARN_ON(err); 1252 } 1253 1254 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1255 tx_flags; 1256 ieee80211_tx_skb(sdata, skb); 1257 } 1258 1259 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1260 const u8 *bssid, u16 stype, u16 reason, 1261 bool send_frame, u8 *frame_buf) 1262 { 1263 struct ieee80211_local *local = sdata->local; 1264 struct sk_buff *skb; 1265 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1266 1267 /* build frame */ 1268 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1269 mgmt->duration = 0; /* initialize only */ 1270 mgmt->seq_ctrl = 0; /* initialize only */ 1271 memcpy(mgmt->da, bssid, ETH_ALEN); 1272 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1273 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1274 /* u.deauth.reason_code == u.disassoc.reason_code */ 1275 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1276 1277 if (send_frame) { 1278 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1279 IEEE80211_DEAUTH_FRAME_LEN); 1280 if (!skb) 1281 return; 1282 1283 skb_reserve(skb, local->hw.extra_tx_headroom); 1284 1285 /* copy in frame */ 1286 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN), 1287 mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1288 1289 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1290 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1291 IEEE80211_SKB_CB(skb)->flags |= 1292 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1293 1294 ieee80211_tx_skb(sdata, skb); 1295 } 1296 } 1297 1298 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1299 u8 *buffer, size_t buffer_len, 1300 const u8 *ie, size_t ie_len, 1301 enum ieee80211_band band, 1302 u32 rate_mask, 1303 struct cfg80211_chan_def *chandef, 1304 size_t *offset) 1305 { 1306 struct ieee80211_supported_band *sband; 1307 u8 *pos = buffer, *end = buffer + buffer_len; 1308 size_t noffset; 1309 int supp_rates_len, i; 1310 u8 rates[32]; 1311 int num_rates; 1312 int ext_rates_len; 1313 int shift; 1314 u32 rate_flags; 1315 bool have_80mhz = false; 1316 1317 *offset = 0; 1318 1319 sband = local->hw.wiphy->bands[band]; 1320 if (WARN_ON_ONCE(!sband)) 1321 return 0; 1322 1323 rate_flags = ieee80211_chandef_rate_flags(chandef); 1324 shift = ieee80211_chandef_get_shift(chandef); 1325 1326 num_rates = 0; 1327 for (i = 0; i < sband->n_bitrates; i++) { 1328 if ((BIT(i) & rate_mask) == 0) 1329 continue; /* skip rate */ 1330 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1331 continue; 1332 1333 rates[num_rates++] = 1334 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1335 (1 << shift) * 5); 1336 } 1337 1338 supp_rates_len = min_t(int, num_rates, 8); 1339 1340 if (end - pos < 2 + supp_rates_len) 1341 goto out_err; 1342 *pos++ = WLAN_EID_SUPP_RATES; 1343 *pos++ = supp_rates_len; 1344 memcpy(pos, rates, supp_rates_len); 1345 pos += supp_rates_len; 1346 1347 /* insert "request information" if in custom IEs */ 1348 if (ie && ie_len) { 1349 static const u8 before_extrates[] = { 1350 WLAN_EID_SSID, 1351 WLAN_EID_SUPP_RATES, 1352 WLAN_EID_REQUEST, 1353 }; 1354 noffset = ieee80211_ie_split(ie, ie_len, 1355 before_extrates, 1356 ARRAY_SIZE(before_extrates), 1357 *offset); 1358 if (end - pos < noffset - *offset) 1359 goto out_err; 1360 memcpy(pos, ie + *offset, noffset - *offset); 1361 pos += noffset - *offset; 1362 *offset = noffset; 1363 } 1364 1365 ext_rates_len = num_rates - supp_rates_len; 1366 if (ext_rates_len > 0) { 1367 if (end - pos < 2 + ext_rates_len) 1368 goto out_err; 1369 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1370 *pos++ = ext_rates_len; 1371 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1372 pos += ext_rates_len; 1373 } 1374 1375 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) { 1376 if (end - pos < 3) 1377 goto out_err; 1378 *pos++ = WLAN_EID_DS_PARAMS; 1379 *pos++ = 1; 1380 *pos++ = ieee80211_frequency_to_channel( 1381 chandef->chan->center_freq); 1382 } 1383 1384 /* insert custom IEs that go before HT */ 1385 if (ie && ie_len) { 1386 static const u8 before_ht[] = { 1387 WLAN_EID_SSID, 1388 WLAN_EID_SUPP_RATES, 1389 WLAN_EID_REQUEST, 1390 WLAN_EID_EXT_SUPP_RATES, 1391 WLAN_EID_DS_PARAMS, 1392 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1393 }; 1394 noffset = ieee80211_ie_split(ie, ie_len, 1395 before_ht, ARRAY_SIZE(before_ht), 1396 *offset); 1397 if (end - pos < noffset - *offset) 1398 goto out_err; 1399 memcpy(pos, ie + *offset, noffset - *offset); 1400 pos += noffset - *offset; 1401 *offset = noffset; 1402 } 1403 1404 if (sband->ht_cap.ht_supported) { 1405 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1406 goto out_err; 1407 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1408 sband->ht_cap.cap); 1409 } 1410 1411 /* 1412 * If adding more here, adjust code in main.c 1413 * that calculates local->scan_ies_len. 1414 */ 1415 1416 /* insert custom IEs that go before VHT */ 1417 if (ie && ie_len) { 1418 static const u8 before_vht[] = { 1419 WLAN_EID_SSID, 1420 WLAN_EID_SUPP_RATES, 1421 WLAN_EID_REQUEST, 1422 WLAN_EID_EXT_SUPP_RATES, 1423 WLAN_EID_DS_PARAMS, 1424 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1425 WLAN_EID_HT_CAPABILITY, 1426 WLAN_EID_BSS_COEX_2040, 1427 WLAN_EID_EXT_CAPABILITY, 1428 WLAN_EID_SSID_LIST, 1429 WLAN_EID_CHANNEL_USAGE, 1430 WLAN_EID_INTERWORKING, 1431 /* mesh ID can't happen here */ 1432 /* 60 GHz can't happen here right now */ 1433 }; 1434 noffset = ieee80211_ie_split(ie, ie_len, 1435 before_vht, ARRAY_SIZE(before_vht), 1436 *offset); 1437 if (end - pos < noffset - *offset) 1438 goto out_err; 1439 memcpy(pos, ie + *offset, noffset - *offset); 1440 pos += noffset - *offset; 1441 *offset = noffset; 1442 } 1443 1444 /* Check if any channel in this sband supports at least 80 MHz */ 1445 for (i = 0; i < sband->n_channels; i++) { 1446 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1447 IEEE80211_CHAN_NO_80MHZ)) 1448 continue; 1449 1450 have_80mhz = true; 1451 break; 1452 } 1453 1454 if (sband->vht_cap.vht_supported && have_80mhz) { 1455 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1456 goto out_err; 1457 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1458 sband->vht_cap.cap); 1459 } 1460 1461 return pos - buffer; 1462 out_err: 1463 WARN_ONCE(1, "not enough space for preq IEs\n"); 1464 return pos - buffer; 1465 } 1466 1467 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1468 size_t buffer_len, 1469 struct ieee80211_scan_ies *ie_desc, 1470 const u8 *ie, size_t ie_len, 1471 u8 bands_used, u32 *rate_masks, 1472 struct cfg80211_chan_def *chandef) 1473 { 1474 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1475 int i; 1476 1477 memset(ie_desc, 0, sizeof(*ie_desc)); 1478 1479 for (i = 0; i < IEEE80211_NUM_BANDS; i++) { 1480 if (bands_used & BIT(i)) { 1481 pos += ieee80211_build_preq_ies_band(local, 1482 buffer + pos, 1483 buffer_len - pos, 1484 ie, ie_len, i, 1485 rate_masks[i], 1486 chandef, 1487 &custom_ie_offset); 1488 ie_desc->ies[i] = buffer + old_pos; 1489 ie_desc->len[i] = pos - old_pos; 1490 old_pos = pos; 1491 } 1492 } 1493 1494 /* add any remaining custom IEs */ 1495 if (ie && ie_len) { 1496 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1497 "not enough space for preq custom IEs\n")) 1498 return pos; 1499 memcpy(buffer + pos, ie + custom_ie_offset, 1500 ie_len - custom_ie_offset); 1501 ie_desc->common_ies = buffer + pos; 1502 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1503 pos += ie_len - custom_ie_offset; 1504 } 1505 1506 return pos; 1507 }; 1508 1509 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1510 const u8 *src, const u8 *dst, 1511 u32 ratemask, 1512 struct ieee80211_channel *chan, 1513 const u8 *ssid, size_t ssid_len, 1514 const u8 *ie, size_t ie_len, 1515 bool directed) 1516 { 1517 struct ieee80211_local *local = sdata->local; 1518 struct cfg80211_chan_def chandef; 1519 struct sk_buff *skb; 1520 struct ieee80211_mgmt *mgmt; 1521 int ies_len; 1522 u32 rate_masks[IEEE80211_NUM_BANDS] = {}; 1523 struct ieee80211_scan_ies dummy_ie_desc; 1524 1525 /* 1526 * Do not send DS Channel parameter for directed probe requests 1527 * in order to maximize the chance that we get a response. Some 1528 * badly-behaved APs don't respond when this parameter is included. 1529 */ 1530 chandef.width = sdata->vif.bss_conf.chandef.width; 1531 if (directed) 1532 chandef.chan = NULL; 1533 else 1534 chandef.chan = chan; 1535 1536 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1537 100 + ie_len); 1538 if (!skb) 1539 return NULL; 1540 1541 rate_masks[chan->band] = ratemask; 1542 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1543 skb_tailroom(skb), &dummy_ie_desc, 1544 ie, ie_len, BIT(chan->band), 1545 rate_masks, &chandef); 1546 skb_put(skb, ies_len); 1547 1548 if (dst) { 1549 mgmt = (struct ieee80211_mgmt *) skb->data; 1550 memcpy(mgmt->da, dst, ETH_ALEN); 1551 memcpy(mgmt->bssid, dst, ETH_ALEN); 1552 } 1553 1554 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1555 1556 return skb; 1557 } 1558 1559 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, 1560 const u8 *src, const u8 *dst, 1561 const u8 *ssid, size_t ssid_len, 1562 const u8 *ie, size_t ie_len, 1563 u32 ratemask, bool directed, u32 tx_flags, 1564 struct ieee80211_channel *channel, bool scan) 1565 { 1566 struct sk_buff *skb; 1567 1568 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel, 1569 ssid, ssid_len, 1570 ie, ie_len, directed); 1571 if (skb) { 1572 IEEE80211_SKB_CB(skb)->flags |= tx_flags; 1573 if (scan) 1574 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band); 1575 else 1576 ieee80211_tx_skb(sdata, skb); 1577 } 1578 } 1579 1580 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1581 struct ieee802_11_elems *elems, 1582 enum ieee80211_band band, u32 *basic_rates) 1583 { 1584 struct ieee80211_supported_band *sband; 1585 size_t num_rates; 1586 u32 supp_rates, rate_flags; 1587 int i, j, shift; 1588 sband = sdata->local->hw.wiphy->bands[band]; 1589 1590 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1591 shift = ieee80211_vif_get_shift(&sdata->vif); 1592 1593 if (WARN_ON(!sband)) 1594 return 1; 1595 1596 num_rates = sband->n_bitrates; 1597 supp_rates = 0; 1598 for (i = 0; i < elems->supp_rates_len + 1599 elems->ext_supp_rates_len; i++) { 1600 u8 rate = 0; 1601 int own_rate; 1602 bool is_basic; 1603 if (i < elems->supp_rates_len) 1604 rate = elems->supp_rates[i]; 1605 else if (elems->ext_supp_rates) 1606 rate = elems->ext_supp_rates 1607 [i - elems->supp_rates_len]; 1608 own_rate = 5 * (rate & 0x7f); 1609 is_basic = !!(rate & 0x80); 1610 1611 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1612 continue; 1613 1614 for (j = 0; j < num_rates; j++) { 1615 int brate; 1616 if ((rate_flags & sband->bitrates[j].flags) 1617 != rate_flags) 1618 continue; 1619 1620 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1621 1 << shift); 1622 1623 if (brate == own_rate) { 1624 supp_rates |= BIT(j); 1625 if (basic_rates && is_basic) 1626 *basic_rates |= BIT(j); 1627 } 1628 } 1629 } 1630 return supp_rates; 1631 } 1632 1633 void ieee80211_stop_device(struct ieee80211_local *local) 1634 { 1635 ieee80211_led_radio(local, false); 1636 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1637 1638 cancel_work_sync(&local->reconfig_filter); 1639 1640 flush_workqueue(local->workqueue); 1641 drv_stop(local); 1642 } 1643 1644 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1645 { 1646 struct ieee80211_sub_if_data *sdata; 1647 struct ieee80211_chanctx *ctx; 1648 1649 /* 1650 * We get here if during resume the device can't be restarted properly. 1651 * We might also get here if this happens during HW reset, which is a 1652 * slightly different situation and we need to drop all connections in 1653 * the latter case. 1654 * 1655 * Ask cfg80211 to turn off all interfaces, this will result in more 1656 * warnings but at least we'll then get into a clean stopped state. 1657 */ 1658 1659 local->resuming = false; 1660 local->suspended = false; 1661 local->in_reconfig = false; 1662 1663 /* scheduled scan clearly can't be running any more, but tell 1664 * cfg80211 and clear local state 1665 */ 1666 ieee80211_sched_scan_end(local); 1667 1668 list_for_each_entry(sdata, &local->interfaces, list) 1669 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1670 1671 /* Mark channel contexts as not being in the driver any more to avoid 1672 * removing them from the driver during the shutdown process... 1673 */ 1674 mutex_lock(&local->chanctx_mtx); 1675 list_for_each_entry(ctx, &local->chanctx_list, list) 1676 ctx->driver_present = false; 1677 mutex_unlock(&local->chanctx_mtx); 1678 1679 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1680 } 1681 1682 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1683 struct ieee80211_sub_if_data *sdata) 1684 { 1685 struct ieee80211_chanctx_conf *conf; 1686 struct ieee80211_chanctx *ctx; 1687 1688 if (!local->use_chanctx) 1689 return; 1690 1691 mutex_lock(&local->chanctx_mtx); 1692 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1693 lockdep_is_held(&local->chanctx_mtx)); 1694 if (conf) { 1695 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1696 drv_assign_vif_chanctx(local, sdata, ctx); 1697 } 1698 mutex_unlock(&local->chanctx_mtx); 1699 } 1700 1701 int ieee80211_reconfig(struct ieee80211_local *local) 1702 { 1703 struct ieee80211_hw *hw = &local->hw; 1704 struct ieee80211_sub_if_data *sdata; 1705 struct ieee80211_chanctx *ctx; 1706 struct sta_info *sta; 1707 int res, i; 1708 bool reconfig_due_to_wowlan = false; 1709 struct ieee80211_sub_if_data *sched_scan_sdata; 1710 struct cfg80211_sched_scan_request *sched_scan_req; 1711 bool sched_scan_stopped = false; 1712 bool suspended = local->suspended; 1713 1714 /* nothing to do if HW shouldn't run */ 1715 if (!local->open_count) 1716 goto wake_up; 1717 1718 #ifdef CONFIG_PM 1719 if (suspended) 1720 local->resuming = true; 1721 1722 if (local->wowlan) { 1723 /* 1724 * In the wowlan case, both mac80211 and the device 1725 * are functional when the resume op is called, so 1726 * clear local->suspended so the device could operate 1727 * normally (e.g. pass rx frames). 1728 */ 1729 local->suspended = false; 1730 res = drv_resume(local); 1731 local->wowlan = false; 1732 if (res < 0) { 1733 local->resuming = false; 1734 return res; 1735 } 1736 if (res == 0) 1737 goto wake_up; 1738 WARN_ON(res > 1); 1739 /* 1740 * res is 1, which means the driver requested 1741 * to go through a regular reset on wakeup. 1742 * restore local->suspended in this case. 1743 */ 1744 reconfig_due_to_wowlan = true; 1745 local->suspended = true; 1746 } 1747 #endif 1748 1749 /* 1750 * In case of hw_restart during suspend (without wowlan), 1751 * cancel restart work, as we are reconfiguring the device 1752 * anyway. 1753 * Note that restart_work is scheduled on a frozen workqueue, 1754 * so we can't deadlock in this case. 1755 */ 1756 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1757 cancel_work_sync(&local->restart_work); 1758 1759 local->started = false; 1760 1761 /* 1762 * Upon resume hardware can sometimes be goofy due to 1763 * various platform / driver / bus issues, so restarting 1764 * the device may at times not work immediately. Propagate 1765 * the error. 1766 */ 1767 res = drv_start(local); 1768 if (res) { 1769 if (suspended) 1770 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1771 else 1772 WARN(1, "Hardware became unavailable during restart.\n"); 1773 ieee80211_handle_reconfig_failure(local); 1774 return res; 1775 } 1776 1777 /* setup fragmentation threshold */ 1778 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1779 1780 /* setup RTS threshold */ 1781 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1782 1783 /* reset coverage class */ 1784 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1785 1786 ieee80211_led_radio(local, true); 1787 ieee80211_mod_tpt_led_trig(local, 1788 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1789 1790 /* add interfaces */ 1791 sdata = rtnl_dereference(local->monitor_sdata); 1792 if (sdata) { 1793 /* in HW restart it exists already */ 1794 WARN_ON(local->resuming); 1795 res = drv_add_interface(local, sdata); 1796 if (WARN_ON(res)) { 1797 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1798 synchronize_net(); 1799 kfree(sdata); 1800 } 1801 } 1802 1803 list_for_each_entry(sdata, &local->interfaces, list) { 1804 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1805 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1806 ieee80211_sdata_running(sdata)) { 1807 res = drv_add_interface(local, sdata); 1808 if (WARN_ON(res)) 1809 break; 1810 } 1811 } 1812 1813 /* If adding any of the interfaces failed above, roll back and 1814 * report failure. 1815 */ 1816 if (res) { 1817 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1818 list) 1819 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1820 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1821 ieee80211_sdata_running(sdata)) 1822 drv_remove_interface(local, sdata); 1823 ieee80211_handle_reconfig_failure(local); 1824 return res; 1825 } 1826 1827 /* add channel contexts */ 1828 if (local->use_chanctx) { 1829 mutex_lock(&local->chanctx_mtx); 1830 list_for_each_entry(ctx, &local->chanctx_list, list) 1831 if (ctx->replace_state != 1832 IEEE80211_CHANCTX_REPLACES_OTHER) 1833 WARN_ON(drv_add_chanctx(local, ctx)); 1834 mutex_unlock(&local->chanctx_mtx); 1835 1836 list_for_each_entry(sdata, &local->interfaces, list) { 1837 if (!ieee80211_sdata_running(sdata)) 1838 continue; 1839 ieee80211_assign_chanctx(local, sdata); 1840 } 1841 1842 sdata = rtnl_dereference(local->monitor_sdata); 1843 if (sdata && ieee80211_sdata_running(sdata)) 1844 ieee80211_assign_chanctx(local, sdata); 1845 } 1846 1847 /* add STAs back */ 1848 mutex_lock(&local->sta_mtx); 1849 list_for_each_entry(sta, &local->sta_list, list) { 1850 enum ieee80211_sta_state state; 1851 1852 if (!sta->uploaded) 1853 continue; 1854 1855 /* AP-mode stations will be added later */ 1856 if (sta->sdata->vif.type == NL80211_IFTYPE_AP) 1857 continue; 1858 1859 for (state = IEEE80211_STA_NOTEXIST; 1860 state < sta->sta_state; state++) 1861 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1862 state + 1)); 1863 } 1864 mutex_unlock(&local->sta_mtx); 1865 1866 /* reconfigure tx conf */ 1867 if (hw->queues >= IEEE80211_NUM_ACS) { 1868 list_for_each_entry(sdata, &local->interfaces, list) { 1869 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 1870 sdata->vif.type == NL80211_IFTYPE_MONITOR || 1871 !ieee80211_sdata_running(sdata)) 1872 continue; 1873 1874 for (i = 0; i < IEEE80211_NUM_ACS; i++) 1875 drv_conf_tx(local, sdata, i, 1876 &sdata->tx_conf[i]); 1877 } 1878 } 1879 1880 /* reconfigure hardware */ 1881 ieee80211_hw_config(local, ~0); 1882 1883 ieee80211_configure_filter(local); 1884 1885 /* Finally also reconfigure all the BSS information */ 1886 list_for_each_entry(sdata, &local->interfaces, list) { 1887 u32 changed; 1888 1889 if (!ieee80211_sdata_running(sdata)) 1890 continue; 1891 1892 /* common change flags for all interface types */ 1893 changed = BSS_CHANGED_ERP_CTS_PROT | 1894 BSS_CHANGED_ERP_PREAMBLE | 1895 BSS_CHANGED_ERP_SLOT | 1896 BSS_CHANGED_HT | 1897 BSS_CHANGED_BASIC_RATES | 1898 BSS_CHANGED_BEACON_INT | 1899 BSS_CHANGED_BSSID | 1900 BSS_CHANGED_CQM | 1901 BSS_CHANGED_QOS | 1902 BSS_CHANGED_IDLE | 1903 BSS_CHANGED_TXPOWER; 1904 1905 switch (sdata->vif.type) { 1906 case NL80211_IFTYPE_STATION: 1907 changed |= BSS_CHANGED_ASSOC | 1908 BSS_CHANGED_ARP_FILTER | 1909 BSS_CHANGED_PS; 1910 1911 /* Re-send beacon info report to the driver */ 1912 if (sdata->u.mgd.have_beacon) 1913 changed |= BSS_CHANGED_BEACON_INFO; 1914 1915 sdata_lock(sdata); 1916 ieee80211_bss_info_change_notify(sdata, changed); 1917 sdata_unlock(sdata); 1918 break; 1919 case NL80211_IFTYPE_OCB: 1920 changed |= BSS_CHANGED_OCB; 1921 ieee80211_bss_info_change_notify(sdata, changed); 1922 break; 1923 case NL80211_IFTYPE_ADHOC: 1924 changed |= BSS_CHANGED_IBSS; 1925 /* fall through */ 1926 case NL80211_IFTYPE_AP: 1927 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 1928 1929 if (sdata->vif.type == NL80211_IFTYPE_AP) { 1930 changed |= BSS_CHANGED_AP_PROBE_RESP; 1931 1932 if (rcu_access_pointer(sdata->u.ap.beacon)) 1933 drv_start_ap(local, sdata); 1934 } 1935 1936 /* fall through */ 1937 case NL80211_IFTYPE_MESH_POINT: 1938 if (sdata->vif.bss_conf.enable_beacon) { 1939 changed |= BSS_CHANGED_BEACON | 1940 BSS_CHANGED_BEACON_ENABLED; 1941 ieee80211_bss_info_change_notify(sdata, changed); 1942 } 1943 break; 1944 case NL80211_IFTYPE_WDS: 1945 case NL80211_IFTYPE_AP_VLAN: 1946 case NL80211_IFTYPE_MONITOR: 1947 case NL80211_IFTYPE_P2P_DEVICE: 1948 /* nothing to do */ 1949 break; 1950 case NL80211_IFTYPE_UNSPECIFIED: 1951 case NUM_NL80211_IFTYPES: 1952 case NL80211_IFTYPE_P2P_CLIENT: 1953 case NL80211_IFTYPE_P2P_GO: 1954 WARN_ON(1); 1955 break; 1956 } 1957 } 1958 1959 ieee80211_recalc_ps(local); 1960 1961 /* 1962 * The sta might be in psm against the ap (e.g. because 1963 * this was the state before a hw restart), so we 1964 * explicitly send a null packet in order to make sure 1965 * it'll sync against the ap (and get out of psm). 1966 */ 1967 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 1968 list_for_each_entry(sdata, &local->interfaces, list) { 1969 if (sdata->vif.type != NL80211_IFTYPE_STATION) 1970 continue; 1971 if (!sdata->u.mgd.associated) 1972 continue; 1973 1974 ieee80211_send_nullfunc(local, sdata, false); 1975 } 1976 } 1977 1978 /* APs are now beaconing, add back stations */ 1979 mutex_lock(&local->sta_mtx); 1980 list_for_each_entry(sta, &local->sta_list, list) { 1981 enum ieee80211_sta_state state; 1982 1983 if (!sta->uploaded) 1984 continue; 1985 1986 if (sta->sdata->vif.type != NL80211_IFTYPE_AP) 1987 continue; 1988 1989 for (state = IEEE80211_STA_NOTEXIST; 1990 state < sta->sta_state; state++) 1991 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1992 state + 1)); 1993 } 1994 mutex_unlock(&local->sta_mtx); 1995 1996 /* add back keys */ 1997 list_for_each_entry(sdata, &local->interfaces, list) 1998 ieee80211_reset_crypto_tx_tailroom(sdata); 1999 2000 list_for_each_entry(sdata, &local->interfaces, list) 2001 if (ieee80211_sdata_running(sdata)) 2002 ieee80211_enable_keys(sdata); 2003 2004 /* Reconfigure sched scan if it was interrupted by FW restart */ 2005 mutex_lock(&local->mtx); 2006 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2007 lockdep_is_held(&local->mtx)); 2008 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2009 lockdep_is_held(&local->mtx)); 2010 if (sched_scan_sdata && sched_scan_req) 2011 /* 2012 * Sched scan stopped, but we don't want to report it. Instead, 2013 * we're trying to reschedule. However, if more than one scan 2014 * plan was set, we cannot reschedule since we don't know which 2015 * scan plan was currently running (and some scan plans may have 2016 * already finished). 2017 */ 2018 if (sched_scan_req->n_scan_plans > 1 || 2019 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2020 sched_scan_req)) 2021 sched_scan_stopped = true; 2022 mutex_unlock(&local->mtx); 2023 2024 if (sched_scan_stopped) 2025 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy); 2026 2027 wake_up: 2028 local->in_reconfig = false; 2029 barrier(); 2030 2031 if (local->monitors == local->open_count && local->monitors > 0) 2032 ieee80211_add_virtual_monitor(local); 2033 2034 /* 2035 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2036 * sessions can be established after a resume. 2037 * 2038 * Also tear down aggregation sessions since reconfiguring 2039 * them in a hardware restart scenario is not easily done 2040 * right now, and the hardware will have lost information 2041 * about the sessions, but we and the AP still think they 2042 * are active. This is really a workaround though. 2043 */ 2044 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2045 mutex_lock(&local->sta_mtx); 2046 2047 list_for_each_entry(sta, &local->sta_list, list) { 2048 if (!local->resuming) 2049 ieee80211_sta_tear_down_BA_sessions( 2050 sta, AGG_STOP_LOCAL_REQUEST); 2051 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2052 } 2053 2054 mutex_unlock(&local->sta_mtx); 2055 } 2056 2057 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2058 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2059 false); 2060 2061 /* 2062 * If this is for hw restart things are still running. 2063 * We may want to change that later, however. 2064 */ 2065 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2066 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2067 2068 if (!suspended) 2069 return 0; 2070 2071 #ifdef CONFIG_PM 2072 /* first set suspended false, then resuming */ 2073 local->suspended = false; 2074 mb(); 2075 local->resuming = false; 2076 2077 /* It's possible that we don't handle the scan completion in 2078 * time during suspend, so if it's still marked as completed 2079 * here, queue the work and flush it to clean things up. 2080 * Instead of calling the worker function directly here, we 2081 * really queue it to avoid potential races with other flows 2082 * scheduling the same work. 2083 */ 2084 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 2085 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 2086 flush_delayed_work(&local->scan_work); 2087 } 2088 2089 if (local->open_count && !reconfig_due_to_wowlan) 2090 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2091 2092 list_for_each_entry(sdata, &local->interfaces, list) { 2093 if (!ieee80211_sdata_running(sdata)) 2094 continue; 2095 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2096 ieee80211_sta_restart(sdata); 2097 } 2098 2099 mod_timer(&local->sta_cleanup, jiffies + 1); 2100 #else 2101 WARN_ON(1); 2102 #endif 2103 2104 return 0; 2105 } 2106 2107 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2108 { 2109 struct ieee80211_sub_if_data *sdata; 2110 struct ieee80211_local *local; 2111 struct ieee80211_key *key; 2112 2113 if (WARN_ON(!vif)) 2114 return; 2115 2116 sdata = vif_to_sdata(vif); 2117 local = sdata->local; 2118 2119 if (WARN_ON(!local->resuming)) 2120 return; 2121 2122 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2123 return; 2124 2125 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2126 2127 mutex_lock(&local->key_mtx); 2128 list_for_each_entry(key, &sdata->key_list, list) 2129 key->flags |= KEY_FLAG_TAINTED; 2130 mutex_unlock(&local->key_mtx); 2131 } 2132 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2133 2134 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2135 { 2136 struct ieee80211_local *local = sdata->local; 2137 struct ieee80211_chanctx_conf *chanctx_conf; 2138 struct ieee80211_chanctx *chanctx; 2139 2140 mutex_lock(&local->chanctx_mtx); 2141 2142 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2143 lockdep_is_held(&local->chanctx_mtx)); 2144 2145 /* 2146 * This function can be called from a work, thus it may be possible 2147 * that the chanctx_conf is removed (due to a disconnection, for 2148 * example). 2149 * So nothing should be done in such case. 2150 */ 2151 if (!chanctx_conf) 2152 goto unlock; 2153 2154 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2155 ieee80211_recalc_smps_chanctx(local, chanctx); 2156 unlock: 2157 mutex_unlock(&local->chanctx_mtx); 2158 } 2159 2160 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2161 { 2162 struct ieee80211_local *local = sdata->local; 2163 struct ieee80211_chanctx_conf *chanctx_conf; 2164 struct ieee80211_chanctx *chanctx; 2165 2166 mutex_lock(&local->chanctx_mtx); 2167 2168 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2169 lockdep_is_held(&local->chanctx_mtx)); 2170 2171 if (WARN_ON_ONCE(!chanctx_conf)) 2172 goto unlock; 2173 2174 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2175 ieee80211_recalc_chanctx_min_def(local, chanctx); 2176 unlock: 2177 mutex_unlock(&local->chanctx_mtx); 2178 } 2179 2180 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2181 { 2182 size_t pos = offset; 2183 2184 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2185 pos += 2 + ies[pos + 1]; 2186 2187 return pos; 2188 } 2189 2190 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2191 int rssi_min_thold, 2192 int rssi_max_thold) 2193 { 2194 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2195 2196 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2197 return; 2198 2199 /* 2200 * Scale up threshold values before storing it, as the RSSI averaging 2201 * algorithm uses a scaled up value as well. Change this scaling 2202 * factor if the RSSI averaging algorithm changes. 2203 */ 2204 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2205 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2206 } 2207 2208 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2209 int rssi_min_thold, 2210 int rssi_max_thold) 2211 { 2212 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2213 2214 WARN_ON(rssi_min_thold == rssi_max_thold || 2215 rssi_min_thold > rssi_max_thold); 2216 2217 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2218 rssi_max_thold); 2219 } 2220 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2221 2222 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2223 { 2224 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2225 2226 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2227 } 2228 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2229 2230 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2231 u16 cap) 2232 { 2233 __le16 tmp; 2234 2235 *pos++ = WLAN_EID_HT_CAPABILITY; 2236 *pos++ = sizeof(struct ieee80211_ht_cap); 2237 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2238 2239 /* capability flags */ 2240 tmp = cpu_to_le16(cap); 2241 memcpy(pos, &tmp, sizeof(u16)); 2242 pos += sizeof(u16); 2243 2244 /* AMPDU parameters */ 2245 *pos++ = ht_cap->ampdu_factor | 2246 (ht_cap->ampdu_density << 2247 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2248 2249 /* MCS set */ 2250 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2251 pos += sizeof(ht_cap->mcs); 2252 2253 /* extended capabilities */ 2254 pos += sizeof(__le16); 2255 2256 /* BF capabilities */ 2257 pos += sizeof(__le32); 2258 2259 /* antenna selection */ 2260 pos += sizeof(u8); 2261 2262 return pos; 2263 } 2264 2265 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2266 u32 cap) 2267 { 2268 __le32 tmp; 2269 2270 *pos++ = WLAN_EID_VHT_CAPABILITY; 2271 *pos++ = sizeof(struct ieee80211_vht_cap); 2272 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2273 2274 /* capability flags */ 2275 tmp = cpu_to_le32(cap); 2276 memcpy(pos, &tmp, sizeof(u32)); 2277 pos += sizeof(u32); 2278 2279 /* VHT MCS set */ 2280 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2281 pos += sizeof(vht_cap->vht_mcs); 2282 2283 return pos; 2284 } 2285 2286 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2287 const struct cfg80211_chan_def *chandef, 2288 u16 prot_mode, bool rifs_mode) 2289 { 2290 struct ieee80211_ht_operation *ht_oper; 2291 /* Build HT Information */ 2292 *pos++ = WLAN_EID_HT_OPERATION; 2293 *pos++ = sizeof(struct ieee80211_ht_operation); 2294 ht_oper = (struct ieee80211_ht_operation *)pos; 2295 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2296 chandef->chan->center_freq); 2297 switch (chandef->width) { 2298 case NL80211_CHAN_WIDTH_160: 2299 case NL80211_CHAN_WIDTH_80P80: 2300 case NL80211_CHAN_WIDTH_80: 2301 case NL80211_CHAN_WIDTH_40: 2302 if (chandef->center_freq1 > chandef->chan->center_freq) 2303 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2304 else 2305 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2306 break; 2307 default: 2308 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2309 break; 2310 } 2311 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2312 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2313 chandef->width != NL80211_CHAN_WIDTH_20) 2314 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2315 2316 if (rifs_mode) 2317 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2318 2319 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2320 ht_oper->stbc_param = 0x0000; 2321 2322 /* It seems that Basic MCS set and Supported MCS set 2323 are identical for the first 10 bytes */ 2324 memset(&ht_oper->basic_set, 0, 16); 2325 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2326 2327 return pos + sizeof(struct ieee80211_ht_operation); 2328 } 2329 2330 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2331 const struct cfg80211_chan_def *chandef) 2332 { 2333 struct ieee80211_vht_operation *vht_oper; 2334 2335 *pos++ = WLAN_EID_VHT_OPERATION; 2336 *pos++ = sizeof(struct ieee80211_vht_operation); 2337 vht_oper = (struct ieee80211_vht_operation *)pos; 2338 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel( 2339 chandef->center_freq1); 2340 if (chandef->center_freq2) 2341 vht_oper->center_freq_seg2_idx = 2342 ieee80211_frequency_to_channel(chandef->center_freq2); 2343 else 2344 vht_oper->center_freq_seg2_idx = 0x00; 2345 2346 switch (chandef->width) { 2347 case NL80211_CHAN_WIDTH_160: 2348 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ; 2349 break; 2350 case NL80211_CHAN_WIDTH_80P80: 2351 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2352 break; 2353 case NL80211_CHAN_WIDTH_80: 2354 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2355 break; 2356 default: 2357 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2358 break; 2359 } 2360 2361 /* don't require special VHT peer rates */ 2362 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2363 2364 return pos + sizeof(struct ieee80211_vht_operation); 2365 } 2366 2367 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan, 2368 const struct ieee80211_ht_operation *ht_oper, 2369 struct cfg80211_chan_def *chandef) 2370 { 2371 enum nl80211_channel_type channel_type; 2372 2373 if (!ht_oper) { 2374 cfg80211_chandef_create(chandef, control_chan, 2375 NL80211_CHAN_NO_HT); 2376 return; 2377 } 2378 2379 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2380 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2381 channel_type = NL80211_CHAN_HT20; 2382 break; 2383 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2384 channel_type = NL80211_CHAN_HT40PLUS; 2385 break; 2386 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2387 channel_type = NL80211_CHAN_HT40MINUS; 2388 break; 2389 default: 2390 channel_type = NL80211_CHAN_NO_HT; 2391 } 2392 2393 cfg80211_chandef_create(chandef, control_chan, channel_type); 2394 } 2395 2396 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan, 2397 const struct ieee80211_vht_operation *oper, 2398 struct cfg80211_chan_def *chandef) 2399 { 2400 if (!oper) 2401 return; 2402 2403 chandef->chan = control_chan; 2404 2405 switch (oper->chan_width) { 2406 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2407 break; 2408 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2409 chandef->width = NL80211_CHAN_WIDTH_80; 2410 break; 2411 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2412 chandef->width = NL80211_CHAN_WIDTH_160; 2413 break; 2414 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2415 chandef->width = NL80211_CHAN_WIDTH_80P80; 2416 break; 2417 default: 2418 break; 2419 } 2420 2421 chandef->center_freq1 = 2422 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2423 control_chan->band); 2424 chandef->center_freq2 = 2425 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx, 2426 control_chan->band); 2427 } 2428 2429 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2430 const struct ieee80211_supported_band *sband, 2431 const u8 *srates, int srates_len, u32 *rates) 2432 { 2433 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2434 int shift = ieee80211_chandef_get_shift(chandef); 2435 struct ieee80211_rate *br; 2436 int brate, rate, i, j, count = 0; 2437 2438 *rates = 0; 2439 2440 for (i = 0; i < srates_len; i++) { 2441 rate = srates[i] & 0x7f; 2442 2443 for (j = 0; j < sband->n_bitrates; j++) { 2444 br = &sband->bitrates[j]; 2445 if ((rate_flags & br->flags) != rate_flags) 2446 continue; 2447 2448 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2449 if (brate == rate) { 2450 *rates |= BIT(j); 2451 count++; 2452 break; 2453 } 2454 } 2455 } 2456 return count; 2457 } 2458 2459 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2460 struct sk_buff *skb, bool need_basic, 2461 enum ieee80211_band band) 2462 { 2463 struct ieee80211_local *local = sdata->local; 2464 struct ieee80211_supported_band *sband; 2465 int rate, shift; 2466 u8 i, rates, *pos; 2467 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2468 u32 rate_flags; 2469 2470 shift = ieee80211_vif_get_shift(&sdata->vif); 2471 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2472 sband = local->hw.wiphy->bands[band]; 2473 rates = 0; 2474 for (i = 0; i < sband->n_bitrates; i++) { 2475 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2476 continue; 2477 rates++; 2478 } 2479 if (rates > 8) 2480 rates = 8; 2481 2482 if (skb_tailroom(skb) < rates + 2) 2483 return -ENOMEM; 2484 2485 pos = skb_put(skb, rates + 2); 2486 *pos++ = WLAN_EID_SUPP_RATES; 2487 *pos++ = rates; 2488 for (i = 0; i < rates; i++) { 2489 u8 basic = 0; 2490 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2491 continue; 2492 2493 if (need_basic && basic_rates & BIT(i)) 2494 basic = 0x80; 2495 rate = sband->bitrates[i].bitrate; 2496 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2497 5 * (1 << shift)); 2498 *pos++ = basic | (u8) rate; 2499 } 2500 2501 return 0; 2502 } 2503 2504 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2505 struct sk_buff *skb, bool need_basic, 2506 enum ieee80211_band band) 2507 { 2508 struct ieee80211_local *local = sdata->local; 2509 struct ieee80211_supported_band *sband; 2510 int rate, shift; 2511 u8 i, exrates, *pos; 2512 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2513 u32 rate_flags; 2514 2515 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2516 shift = ieee80211_vif_get_shift(&sdata->vif); 2517 2518 sband = local->hw.wiphy->bands[band]; 2519 exrates = 0; 2520 for (i = 0; i < sband->n_bitrates; i++) { 2521 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2522 continue; 2523 exrates++; 2524 } 2525 2526 if (exrates > 8) 2527 exrates -= 8; 2528 else 2529 exrates = 0; 2530 2531 if (skb_tailroom(skb) < exrates + 2) 2532 return -ENOMEM; 2533 2534 if (exrates) { 2535 pos = skb_put(skb, exrates + 2); 2536 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2537 *pos++ = exrates; 2538 for (i = 8; i < sband->n_bitrates; i++) { 2539 u8 basic = 0; 2540 if ((rate_flags & sband->bitrates[i].flags) 2541 != rate_flags) 2542 continue; 2543 if (need_basic && basic_rates & BIT(i)) 2544 basic = 0x80; 2545 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2546 5 * (1 << shift)); 2547 *pos++ = basic | (u8) rate; 2548 } 2549 } 2550 return 0; 2551 } 2552 2553 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2554 { 2555 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2556 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2557 2558 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2559 /* non-managed type inferfaces */ 2560 return 0; 2561 } 2562 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2563 } 2564 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2565 2566 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2567 { 2568 if (!mcs) 2569 return 1; 2570 2571 /* TODO: consider rx_highest */ 2572 2573 if (mcs->rx_mask[3]) 2574 return 4; 2575 if (mcs->rx_mask[2]) 2576 return 3; 2577 if (mcs->rx_mask[1]) 2578 return 2; 2579 return 1; 2580 } 2581 2582 /** 2583 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2584 * @local: mac80211 hw info struct 2585 * @status: RX status 2586 * @mpdu_len: total MPDU length (including FCS) 2587 * @mpdu_offset: offset into MPDU to calculate timestamp at 2588 * 2589 * This function calculates the RX timestamp at the given MPDU offset, taking 2590 * into account what the RX timestamp was. An offset of 0 will just normalize 2591 * the timestamp to TSF at beginning of MPDU reception. 2592 */ 2593 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2594 struct ieee80211_rx_status *status, 2595 unsigned int mpdu_len, 2596 unsigned int mpdu_offset) 2597 { 2598 u64 ts = status->mactime; 2599 struct rate_info ri; 2600 u16 rate; 2601 2602 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2603 return 0; 2604 2605 memset(&ri, 0, sizeof(ri)); 2606 2607 /* Fill cfg80211 rate info */ 2608 if (status->flag & RX_FLAG_HT) { 2609 ri.mcs = status->rate_idx; 2610 ri.flags |= RATE_INFO_FLAGS_MCS; 2611 if (status->flag & RX_FLAG_40MHZ) 2612 ri.bw = RATE_INFO_BW_40; 2613 else 2614 ri.bw = RATE_INFO_BW_20; 2615 if (status->flag & RX_FLAG_SHORT_GI) 2616 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2617 } else if (status->flag & RX_FLAG_VHT) { 2618 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2619 ri.mcs = status->rate_idx; 2620 ri.nss = status->vht_nss; 2621 if (status->flag & RX_FLAG_40MHZ) 2622 ri.bw = RATE_INFO_BW_40; 2623 else if (status->vht_flag & RX_VHT_FLAG_80MHZ) 2624 ri.bw = RATE_INFO_BW_80; 2625 else if (status->vht_flag & RX_VHT_FLAG_160MHZ) 2626 ri.bw = RATE_INFO_BW_160; 2627 else 2628 ri.bw = RATE_INFO_BW_20; 2629 if (status->flag & RX_FLAG_SHORT_GI) 2630 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2631 } else { 2632 struct ieee80211_supported_band *sband; 2633 int shift = 0; 2634 int bitrate; 2635 2636 if (status->flag & RX_FLAG_10MHZ) { 2637 shift = 1; 2638 ri.bw = RATE_INFO_BW_10; 2639 } else if (status->flag & RX_FLAG_5MHZ) { 2640 shift = 2; 2641 ri.bw = RATE_INFO_BW_5; 2642 } else { 2643 ri.bw = RATE_INFO_BW_20; 2644 } 2645 2646 sband = local->hw.wiphy->bands[status->band]; 2647 bitrate = sband->bitrates[status->rate_idx].bitrate; 2648 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2649 } 2650 2651 rate = cfg80211_calculate_bitrate(&ri); 2652 if (WARN_ONCE(!rate, 2653 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n", 2654 status->flag, status->rate_idx, status->vht_nss)) 2655 return 0; 2656 2657 /* rewind from end of MPDU */ 2658 if (status->flag & RX_FLAG_MACTIME_END) 2659 ts -= mpdu_len * 8 * 10 / rate; 2660 2661 ts += mpdu_offset * 8 * 10 / rate; 2662 2663 return ts; 2664 } 2665 2666 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2667 { 2668 struct ieee80211_sub_if_data *sdata; 2669 struct cfg80211_chan_def chandef; 2670 2671 mutex_lock(&local->mtx); 2672 mutex_lock(&local->iflist_mtx); 2673 list_for_each_entry(sdata, &local->interfaces, list) { 2674 /* it might be waiting for the local->mtx, but then 2675 * by the time it gets it, sdata->wdev.cac_started 2676 * will no longer be true 2677 */ 2678 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2679 2680 if (sdata->wdev.cac_started) { 2681 chandef = sdata->vif.bss_conf.chandef; 2682 ieee80211_vif_release_channel(sdata); 2683 cfg80211_cac_event(sdata->dev, 2684 &chandef, 2685 NL80211_RADAR_CAC_ABORTED, 2686 GFP_KERNEL); 2687 } 2688 } 2689 mutex_unlock(&local->iflist_mtx); 2690 mutex_unlock(&local->mtx); 2691 } 2692 2693 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2694 { 2695 struct ieee80211_local *local = 2696 container_of(work, struct ieee80211_local, radar_detected_work); 2697 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2698 struct ieee80211_chanctx *ctx; 2699 int num_chanctx = 0; 2700 2701 mutex_lock(&local->chanctx_mtx); 2702 list_for_each_entry(ctx, &local->chanctx_list, list) { 2703 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 2704 continue; 2705 2706 num_chanctx++; 2707 chandef = ctx->conf.def; 2708 } 2709 mutex_unlock(&local->chanctx_mtx); 2710 2711 ieee80211_dfs_cac_cancel(local); 2712 2713 if (num_chanctx > 1) 2714 /* XXX: multi-channel is not supported yet */ 2715 WARN_ON(1); 2716 else 2717 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 2718 } 2719 2720 void ieee80211_radar_detected(struct ieee80211_hw *hw) 2721 { 2722 struct ieee80211_local *local = hw_to_local(hw); 2723 2724 trace_api_radar_detected(local); 2725 2726 ieee80211_queue_work(hw, &local->radar_detected_work); 2727 } 2728 EXPORT_SYMBOL(ieee80211_radar_detected); 2729 2730 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 2731 { 2732 u32 ret; 2733 int tmp; 2734 2735 switch (c->width) { 2736 case NL80211_CHAN_WIDTH_20: 2737 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2738 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2739 break; 2740 case NL80211_CHAN_WIDTH_40: 2741 c->width = NL80211_CHAN_WIDTH_20; 2742 c->center_freq1 = c->chan->center_freq; 2743 ret = IEEE80211_STA_DISABLE_40MHZ | 2744 IEEE80211_STA_DISABLE_VHT; 2745 break; 2746 case NL80211_CHAN_WIDTH_80: 2747 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 2748 /* n_P40 */ 2749 tmp /= 2; 2750 /* freq_P40 */ 2751 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 2752 c->width = NL80211_CHAN_WIDTH_40; 2753 ret = IEEE80211_STA_DISABLE_VHT; 2754 break; 2755 case NL80211_CHAN_WIDTH_80P80: 2756 c->center_freq2 = 0; 2757 c->width = NL80211_CHAN_WIDTH_80; 2758 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2759 IEEE80211_STA_DISABLE_160MHZ; 2760 break; 2761 case NL80211_CHAN_WIDTH_160: 2762 /* n_P20 */ 2763 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 2764 /* n_P80 */ 2765 tmp /= 4; 2766 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 2767 c->width = NL80211_CHAN_WIDTH_80; 2768 ret = IEEE80211_STA_DISABLE_80P80MHZ | 2769 IEEE80211_STA_DISABLE_160MHZ; 2770 break; 2771 default: 2772 case NL80211_CHAN_WIDTH_20_NOHT: 2773 WARN_ON_ONCE(1); 2774 c->width = NL80211_CHAN_WIDTH_20_NOHT; 2775 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2776 break; 2777 case NL80211_CHAN_WIDTH_5: 2778 case NL80211_CHAN_WIDTH_10: 2779 WARN_ON_ONCE(1); 2780 /* keep c->width */ 2781 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 2782 break; 2783 } 2784 2785 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 2786 2787 return ret; 2788 } 2789 2790 /* 2791 * Returns true if smps_mode_new is strictly more restrictive than 2792 * smps_mode_old. 2793 */ 2794 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 2795 enum ieee80211_smps_mode smps_mode_new) 2796 { 2797 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 2798 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 2799 return false; 2800 2801 switch (smps_mode_old) { 2802 case IEEE80211_SMPS_STATIC: 2803 return false; 2804 case IEEE80211_SMPS_DYNAMIC: 2805 return smps_mode_new == IEEE80211_SMPS_STATIC; 2806 case IEEE80211_SMPS_OFF: 2807 return smps_mode_new != IEEE80211_SMPS_OFF; 2808 default: 2809 WARN_ON(1); 2810 } 2811 2812 return false; 2813 } 2814 2815 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 2816 struct cfg80211_csa_settings *csa_settings) 2817 { 2818 struct sk_buff *skb; 2819 struct ieee80211_mgmt *mgmt; 2820 struct ieee80211_local *local = sdata->local; 2821 int freq; 2822 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) + 2823 sizeof(mgmt->u.action.u.chan_switch); 2824 u8 *pos; 2825 2826 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 2827 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 2828 return -EOPNOTSUPP; 2829 2830 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 2831 5 + /* channel switch announcement element */ 2832 3 + /* secondary channel offset element */ 2833 8); /* mesh channel switch parameters element */ 2834 if (!skb) 2835 return -ENOMEM; 2836 2837 skb_reserve(skb, local->tx_headroom); 2838 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len); 2839 memset(mgmt, 0, hdr_len); 2840 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2841 IEEE80211_STYPE_ACTION); 2842 2843 eth_broadcast_addr(mgmt->da); 2844 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2845 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2846 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 2847 } else { 2848 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 2849 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 2850 } 2851 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 2852 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 2853 pos = skb_put(skb, 5); 2854 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 2855 *pos++ = 3; /* IE length */ 2856 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 2857 freq = csa_settings->chandef.chan->center_freq; 2858 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 2859 *pos++ = csa_settings->count; /* count */ 2860 2861 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 2862 enum nl80211_channel_type ch_type; 2863 2864 skb_put(skb, 3); 2865 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 2866 *pos++ = 1; /* IE length */ 2867 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 2868 if (ch_type == NL80211_CHAN_HT40PLUS) 2869 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2870 else 2871 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2872 } 2873 2874 if (ieee80211_vif_is_mesh(&sdata->vif)) { 2875 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 2876 2877 skb_put(skb, 8); 2878 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 2879 *pos++ = 6; /* IE length */ 2880 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 2881 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 2882 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 2883 *pos++ |= csa_settings->block_tx ? 2884 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 2885 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 2886 pos += 2; 2887 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 2888 pos += 2; 2889 } 2890 2891 ieee80211_tx_skb(sdata, skb); 2892 return 0; 2893 } 2894 2895 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 2896 { 2897 return !(cs == NULL || cs->cipher == 0 || 2898 cs->hdr_len < cs->pn_len + cs->pn_off || 2899 cs->hdr_len <= cs->key_idx_off || 2900 cs->key_idx_shift > 7 || 2901 cs->key_idx_mask == 0); 2902 } 2903 2904 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 2905 { 2906 int i; 2907 2908 /* Ensure we have enough iftype bitmap space for all iftype values */ 2909 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 2910 2911 for (i = 0; i < n; i++) 2912 if (!ieee80211_cs_valid(&cs[i])) 2913 return false; 2914 2915 return true; 2916 } 2917 2918 const struct ieee80211_cipher_scheme * 2919 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 2920 enum nl80211_iftype iftype) 2921 { 2922 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 2923 int n = local->hw.n_cipher_schemes; 2924 int i; 2925 const struct ieee80211_cipher_scheme *cs = NULL; 2926 2927 for (i = 0; i < n; i++) { 2928 if (l[i].cipher == cipher) { 2929 cs = &l[i]; 2930 break; 2931 } 2932 } 2933 2934 if (!cs || !(cs->iftype & BIT(iftype))) 2935 return NULL; 2936 2937 return cs; 2938 } 2939 2940 int ieee80211_cs_headroom(struct ieee80211_local *local, 2941 struct cfg80211_crypto_settings *crypto, 2942 enum nl80211_iftype iftype) 2943 { 2944 const struct ieee80211_cipher_scheme *cs; 2945 int headroom = IEEE80211_ENCRYPT_HEADROOM; 2946 int i; 2947 2948 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 2949 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 2950 iftype); 2951 2952 if (cs && headroom < cs->hdr_len) 2953 headroom = cs->hdr_len; 2954 } 2955 2956 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 2957 if (cs && headroom < cs->hdr_len) 2958 headroom = cs->hdr_len; 2959 2960 return headroom; 2961 } 2962 2963 static bool 2964 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 2965 { 2966 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 2967 int skip; 2968 2969 if (end > 0) 2970 return false; 2971 2972 /* One shot NOA */ 2973 if (data->count[i] == 1) 2974 return false; 2975 2976 if (data->desc[i].interval == 0) 2977 return false; 2978 2979 /* End time is in the past, check for repetitions */ 2980 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 2981 if (data->count[i] < 255) { 2982 if (data->count[i] <= skip) { 2983 data->count[i] = 0; 2984 return false; 2985 } 2986 2987 data->count[i] -= skip; 2988 } 2989 2990 data->desc[i].start += skip * data->desc[i].interval; 2991 2992 return true; 2993 } 2994 2995 static bool 2996 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 2997 s32 *offset) 2998 { 2999 bool ret = false; 3000 int i; 3001 3002 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3003 s32 cur; 3004 3005 if (!data->count[i]) 3006 continue; 3007 3008 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3009 ret = true; 3010 3011 cur = data->desc[i].start - tsf; 3012 if (cur > *offset) 3013 continue; 3014 3015 cur = data->desc[i].start + data->desc[i].duration - tsf; 3016 if (cur > *offset) 3017 *offset = cur; 3018 } 3019 3020 return ret; 3021 } 3022 3023 static u32 3024 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3025 { 3026 s32 offset = 0; 3027 int tries = 0; 3028 /* 3029 * arbitrary limit, used to avoid infinite loops when combined NoA 3030 * descriptors cover the full time period. 3031 */ 3032 int max_tries = 5; 3033 3034 ieee80211_extend_absent_time(data, tsf, &offset); 3035 do { 3036 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3037 break; 3038 3039 tries++; 3040 } while (tries < max_tries); 3041 3042 return offset; 3043 } 3044 3045 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3046 { 3047 u32 next_offset = BIT(31) - 1; 3048 int i; 3049 3050 data->absent = 0; 3051 data->has_next_tsf = false; 3052 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3053 s32 start; 3054 3055 if (!data->count[i]) 3056 continue; 3057 3058 ieee80211_extend_noa_desc(data, tsf, i); 3059 start = data->desc[i].start - tsf; 3060 if (start <= 0) 3061 data->absent |= BIT(i); 3062 3063 if (next_offset > start) 3064 next_offset = start; 3065 3066 data->has_next_tsf = true; 3067 } 3068 3069 if (data->absent) 3070 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3071 3072 data->next_tsf = tsf + next_offset; 3073 } 3074 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3075 3076 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3077 struct ieee80211_noa_data *data, u32 tsf) 3078 { 3079 int ret = 0; 3080 int i; 3081 3082 memset(data, 0, sizeof(*data)); 3083 3084 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3085 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3086 3087 if (!desc->count || !desc->duration) 3088 continue; 3089 3090 data->count[i] = desc->count; 3091 data->desc[i].start = le32_to_cpu(desc->start_time); 3092 data->desc[i].duration = le32_to_cpu(desc->duration); 3093 data->desc[i].interval = le32_to_cpu(desc->interval); 3094 3095 if (data->count[i] > 1 && 3096 data->desc[i].interval < data->desc[i].duration) 3097 continue; 3098 3099 ieee80211_extend_noa_desc(data, tsf, i); 3100 ret++; 3101 } 3102 3103 if (ret) 3104 ieee80211_update_p2p_noa(data, tsf); 3105 3106 return ret; 3107 } 3108 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3109 3110 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3111 struct ieee80211_sub_if_data *sdata) 3112 { 3113 u64 tsf = drv_get_tsf(local, sdata); 3114 u64 dtim_count = 0; 3115 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3116 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3117 struct ps_data *ps; 3118 u8 bcns_from_dtim; 3119 3120 if (tsf == -1ULL || !beacon_int || !dtim_period) 3121 return; 3122 3123 if (sdata->vif.type == NL80211_IFTYPE_AP || 3124 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3125 if (!sdata->bss) 3126 return; 3127 3128 ps = &sdata->bss->ps; 3129 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3130 ps = &sdata->u.mesh.ps; 3131 } else { 3132 return; 3133 } 3134 3135 /* 3136 * actually finds last dtim_count, mac80211 will update in 3137 * __beacon_add_tim(). 3138 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3139 */ 3140 do_div(tsf, beacon_int); 3141 bcns_from_dtim = do_div(tsf, dtim_period); 3142 /* just had a DTIM */ 3143 if (!bcns_from_dtim) 3144 dtim_count = 0; 3145 else 3146 dtim_count = dtim_period - bcns_from_dtim; 3147 3148 ps->dtim_count = dtim_count; 3149 } 3150 3151 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3152 struct ieee80211_chanctx *ctx) 3153 { 3154 struct ieee80211_sub_if_data *sdata; 3155 u8 radar_detect = 0; 3156 3157 lockdep_assert_held(&local->chanctx_mtx); 3158 3159 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3160 return 0; 3161 3162 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3163 if (sdata->reserved_radar_required) 3164 radar_detect |= BIT(sdata->reserved_chandef.width); 3165 3166 /* 3167 * An in-place reservation context should not have any assigned vifs 3168 * until it replaces the other context. 3169 */ 3170 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3171 !list_empty(&ctx->assigned_vifs)); 3172 3173 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3174 if (sdata->radar_required) 3175 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3176 3177 return radar_detect; 3178 } 3179 3180 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3181 const struct cfg80211_chan_def *chandef, 3182 enum ieee80211_chanctx_mode chanmode, 3183 u8 radar_detect) 3184 { 3185 struct ieee80211_local *local = sdata->local; 3186 struct ieee80211_sub_if_data *sdata_iter; 3187 enum nl80211_iftype iftype = sdata->wdev.iftype; 3188 int num[NUM_NL80211_IFTYPES]; 3189 struct ieee80211_chanctx *ctx; 3190 int num_different_channels = 0; 3191 int total = 1; 3192 3193 lockdep_assert_held(&local->chanctx_mtx); 3194 3195 if (WARN_ON(hweight32(radar_detect) > 1)) 3196 return -EINVAL; 3197 3198 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3199 !chandef->chan)) 3200 return -EINVAL; 3201 3202 if (chandef) 3203 num_different_channels = 1; 3204 3205 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3206 return -EINVAL; 3207 3208 /* Always allow software iftypes */ 3209 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3210 if (radar_detect) 3211 return -EINVAL; 3212 return 0; 3213 } 3214 3215 memset(num, 0, sizeof(num)); 3216 3217 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3218 num[iftype] = 1; 3219 3220 list_for_each_entry(ctx, &local->chanctx_list, list) { 3221 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3222 continue; 3223 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3224 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3225 num_different_channels++; 3226 continue; 3227 } 3228 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3229 cfg80211_chandef_compatible(chandef, 3230 &ctx->conf.def)) 3231 continue; 3232 num_different_channels++; 3233 } 3234 3235 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3236 struct wireless_dev *wdev_iter; 3237 3238 wdev_iter = &sdata_iter->wdev; 3239 3240 if (sdata_iter == sdata || 3241 !ieee80211_sdata_running(sdata_iter) || 3242 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3243 continue; 3244 3245 num[wdev_iter->iftype]++; 3246 total++; 3247 } 3248 3249 if (total == 1 && !radar_detect) 3250 return 0; 3251 3252 return cfg80211_check_combinations(local->hw.wiphy, 3253 num_different_channels, 3254 radar_detect, num); 3255 } 3256 3257 static void 3258 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3259 void *data) 3260 { 3261 u32 *max_num_different_channels = data; 3262 3263 *max_num_different_channels = max(*max_num_different_channels, 3264 c->num_different_channels); 3265 } 3266 3267 int ieee80211_max_num_channels(struct ieee80211_local *local) 3268 { 3269 struct ieee80211_sub_if_data *sdata; 3270 int num[NUM_NL80211_IFTYPES] = {}; 3271 struct ieee80211_chanctx *ctx; 3272 int num_different_channels = 0; 3273 u8 radar_detect = 0; 3274 u32 max_num_different_channels = 1; 3275 int err; 3276 3277 lockdep_assert_held(&local->chanctx_mtx); 3278 3279 list_for_each_entry(ctx, &local->chanctx_list, list) { 3280 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3281 continue; 3282 3283 num_different_channels++; 3284 3285 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx); 3286 } 3287 3288 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3289 num[sdata->wdev.iftype]++; 3290 3291 err = cfg80211_iter_combinations(local->hw.wiphy, 3292 num_different_channels, radar_detect, 3293 num, ieee80211_iter_max_chans, 3294 &max_num_different_channels); 3295 if (err < 0) 3296 return err; 3297 3298 return max_num_different_channels; 3299 } 3300 3301 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3302 { 3303 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3304 *buf++ = 7; /* len */ 3305 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3306 *buf++ = 0x50; 3307 *buf++ = 0xf2; 3308 *buf++ = 2; /* WME */ 3309 *buf++ = 0; /* WME info */ 3310 *buf++ = 1; /* WME ver */ 3311 *buf++ = qosinfo; /* U-APSD no in use */ 3312 3313 return buf; 3314 } 3315 3316 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata, 3317 struct sta_info *sta, 3318 struct txq_info *txqi, int tid) 3319 { 3320 skb_queue_head_init(&txqi->queue); 3321 txqi->txq.vif = &sdata->vif; 3322 3323 if (sta) { 3324 txqi->txq.sta = &sta->sta; 3325 sta->sta.txq[tid] = &txqi->txq; 3326 txqi->txq.tid = tid; 3327 txqi->txq.ac = ieee802_1d_to_ac[tid & 7]; 3328 } else { 3329 sdata->vif.txq = &txqi->txq; 3330 txqi->txq.tid = 0; 3331 txqi->txq.ac = IEEE80211_AC_BE; 3332 } 3333 } 3334