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