1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2015-2017 Intel Deutschland GmbH 8 * Copyright (C) 2018 Intel Corporation 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 * 14 * utilities for mac80211 15 */ 16 17 #include <net/mac80211.h> 18 #include <linux/netdevice.h> 19 #include <linux/export.h> 20 #include <linux/types.h> 21 #include <linux/slab.h> 22 #include <linux/skbuff.h> 23 #include <linux/etherdevice.h> 24 #include <linux/if_arp.h> 25 #include <linux/bitmap.h> 26 #include <linux/crc32.h> 27 #include <net/net_namespace.h> 28 #include <net/cfg80211.h> 29 #include <net/rtnetlink.h> 30 31 #include "ieee80211_i.h" 32 #include "driver-ops.h" 33 #include "rate.h" 34 #include "mesh.h" 35 #include "wme.h" 36 #include "led.h" 37 #include "wep.h" 38 39 /* privid for wiphys to determine whether they belong to us or not */ 40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 41 42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 43 { 44 struct ieee80211_local *local; 45 BUG_ON(!wiphy); 46 47 local = wiphy_priv(wiphy); 48 return &local->hw; 49 } 50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 51 52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 53 { 54 struct sk_buff *skb; 55 struct ieee80211_hdr *hdr; 56 57 skb_queue_walk(&tx->skbs, skb) { 58 hdr = (struct ieee80211_hdr *) skb->data; 59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 60 } 61 } 62 63 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 64 int rate, int erp, int short_preamble, 65 int shift) 66 { 67 int dur; 68 69 /* calculate duration (in microseconds, rounded up to next higher 70 * integer if it includes a fractional microsecond) to send frame of 71 * len bytes (does not include FCS) at the given rate. Duration will 72 * also include SIFS. 73 * 74 * rate is in 100 kbps, so divident is multiplied by 10 in the 75 * DIV_ROUND_UP() operations. 76 * 77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and 78 * is assumed to be 0 otherwise. 79 */ 80 81 if (band == NL80211_BAND_5GHZ || erp) { 82 /* 83 * OFDM: 84 * 85 * N_DBPS = DATARATE x 4 86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 87 * (16 = SIGNAL time, 6 = tail bits) 88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 89 * 90 * T_SYM = 4 usec 91 * 802.11a - 18.5.2: aSIFSTime = 16 usec 92 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 93 * signal ext = 6 usec 94 */ 95 dur = 16; /* SIFS + signal ext */ 96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 98 99 /* IEEE 802.11-2012 18.3.2.4: all values above are: 100 * * times 4 for 5 MHz 101 * * times 2 for 10 MHz 102 */ 103 dur *= 1 << shift; 104 105 /* rates should already consider the channel bandwidth, 106 * don't apply divisor again. 107 */ 108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 109 4 * rate); /* T_SYM x N_SYM */ 110 } else { 111 /* 112 * 802.11b or 802.11g with 802.11b compatibility: 113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 115 * 116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 117 * aSIFSTime = 10 usec 118 * aPreambleLength = 144 usec or 72 usec with short preamble 119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 120 */ 121 dur = 10; /* aSIFSTime = 10 usec */ 122 dur += short_preamble ? (72 + 24) : (144 + 48); 123 124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 125 } 126 127 return dur; 128 } 129 130 /* Exported duration function for driver use */ 131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 132 struct ieee80211_vif *vif, 133 enum nl80211_band band, 134 size_t frame_len, 135 struct ieee80211_rate *rate) 136 { 137 struct ieee80211_sub_if_data *sdata; 138 u16 dur; 139 int erp, shift = 0; 140 bool short_preamble = false; 141 142 erp = 0; 143 if (vif) { 144 sdata = vif_to_sdata(vif); 145 short_preamble = sdata->vif.bss_conf.use_short_preamble; 146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 147 erp = rate->flags & IEEE80211_RATE_ERP_G; 148 shift = ieee80211_vif_get_shift(vif); 149 } 150 151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 152 short_preamble, shift); 153 154 return cpu_to_le16(dur); 155 } 156 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 157 158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 159 struct ieee80211_vif *vif, size_t frame_len, 160 const struct ieee80211_tx_info *frame_txctl) 161 { 162 struct ieee80211_local *local = hw_to_local(hw); 163 struct ieee80211_rate *rate; 164 struct ieee80211_sub_if_data *sdata; 165 bool short_preamble; 166 int erp, shift = 0, bitrate; 167 u16 dur; 168 struct ieee80211_supported_band *sband; 169 170 sband = local->hw.wiphy->bands[frame_txctl->band]; 171 172 short_preamble = false; 173 174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 175 176 erp = 0; 177 if (vif) { 178 sdata = vif_to_sdata(vif); 179 short_preamble = sdata->vif.bss_conf.use_short_preamble; 180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 181 erp = rate->flags & IEEE80211_RATE_ERP_G; 182 shift = ieee80211_vif_get_shift(vif); 183 } 184 185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 186 187 /* CTS duration */ 188 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 189 erp, short_preamble, shift); 190 /* Data frame duration */ 191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 192 erp, short_preamble, shift); 193 /* ACK duration */ 194 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 195 erp, short_preamble, shift); 196 197 return cpu_to_le16(dur); 198 } 199 EXPORT_SYMBOL(ieee80211_rts_duration); 200 201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 202 struct ieee80211_vif *vif, 203 size_t frame_len, 204 const struct ieee80211_tx_info *frame_txctl) 205 { 206 struct ieee80211_local *local = hw_to_local(hw); 207 struct ieee80211_rate *rate; 208 struct ieee80211_sub_if_data *sdata; 209 bool short_preamble; 210 int erp, shift = 0, bitrate; 211 u16 dur; 212 struct ieee80211_supported_band *sband; 213 214 sband = local->hw.wiphy->bands[frame_txctl->band]; 215 216 short_preamble = false; 217 218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 219 erp = 0; 220 if (vif) { 221 sdata = vif_to_sdata(vif); 222 short_preamble = sdata->vif.bss_conf.use_short_preamble; 223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) 224 erp = rate->flags & IEEE80211_RATE_ERP_G; 225 shift = ieee80211_vif_get_shift(vif); 226 } 227 228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift); 229 230 /* Data frame duration */ 231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 232 erp, short_preamble, shift); 233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 234 /* ACK duration */ 235 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 236 erp, short_preamble, shift); 237 } 238 239 return cpu_to_le16(dur); 240 } 241 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 242 243 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue) 244 { 245 struct ieee80211_sub_if_data *sdata; 246 int n_acs = IEEE80211_NUM_ACS; 247 248 if (local->ops->wake_tx_queue) 249 return; 250 251 if (local->hw.queues < IEEE80211_NUM_ACS) 252 n_acs = 1; 253 254 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 255 int ac; 256 257 if (!sdata->dev) 258 continue; 259 260 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE && 261 local->queue_stop_reasons[sdata->vif.cab_queue] != 0) 262 continue; 263 264 for (ac = 0; ac < n_acs; ac++) { 265 int ac_queue = sdata->vif.hw_queue[ac]; 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 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 295 local->q_stop_reasons[queue][reason] = 0; 296 } 297 298 if (local->q_stop_reasons[queue][reason] == 0) 299 __clear_bit(reason, &local->queue_stop_reasons[queue]); 300 301 if (local->queue_stop_reasons[queue] != 0) 302 /* someone still has this queue stopped */ 303 return; 304 305 if (skb_queue_empty(&local->pending[queue])) { 306 rcu_read_lock(); 307 ieee80211_propagate_queue_wake(local, queue); 308 rcu_read_unlock(); 309 } else 310 tasklet_schedule(&local->tx_pending_tasklet); 311 } 312 313 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 314 enum queue_stop_reason reason, 315 bool refcounted) 316 { 317 struct ieee80211_local *local = hw_to_local(hw); 318 unsigned long flags; 319 320 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 321 __ieee80211_wake_queue(hw, queue, reason, refcounted); 322 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 323 } 324 325 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 326 { 327 ieee80211_wake_queue_by_reason(hw, queue, 328 IEEE80211_QUEUE_STOP_REASON_DRIVER, 329 false); 330 } 331 EXPORT_SYMBOL(ieee80211_wake_queue); 332 333 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 334 enum queue_stop_reason reason, 335 bool refcounted) 336 { 337 struct ieee80211_local *local = hw_to_local(hw); 338 struct ieee80211_sub_if_data *sdata; 339 int n_acs = IEEE80211_NUM_ACS; 340 341 trace_stop_queue(local, queue, reason); 342 343 if (WARN_ON(queue >= hw->queues)) 344 return; 345 346 if (!refcounted) 347 local->q_stop_reasons[queue][reason] = 1; 348 else 349 local->q_stop_reasons[queue][reason]++; 350 351 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue])) 352 return; 353 354 if (local->ops->wake_tx_queue) 355 return; 356 357 if (local->hw.queues < IEEE80211_NUM_ACS) 358 n_acs = 1; 359 360 rcu_read_lock(); 361 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 362 int ac; 363 364 if (!sdata->dev) 365 continue; 366 367 for (ac = 0; ac < n_acs; ac++) { 368 if (sdata->vif.hw_queue[ac] == queue || 369 sdata->vif.cab_queue == queue) 370 netif_stop_subqueue(sdata->dev, ac); 371 } 372 } 373 rcu_read_unlock(); 374 } 375 376 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 377 enum queue_stop_reason reason, 378 bool refcounted) 379 { 380 struct ieee80211_local *local = hw_to_local(hw); 381 unsigned long flags; 382 383 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 384 __ieee80211_stop_queue(hw, queue, reason, refcounted); 385 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 386 } 387 388 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 389 { 390 ieee80211_stop_queue_by_reason(hw, queue, 391 IEEE80211_QUEUE_STOP_REASON_DRIVER, 392 false); 393 } 394 EXPORT_SYMBOL(ieee80211_stop_queue); 395 396 void ieee80211_add_pending_skb(struct ieee80211_local *local, 397 struct sk_buff *skb) 398 { 399 struct ieee80211_hw *hw = &local->hw; 400 unsigned long flags; 401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 402 int queue = info->hw_queue; 403 404 if (WARN_ON(!info->control.vif)) { 405 ieee80211_free_txskb(&local->hw, skb); 406 return; 407 } 408 409 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 410 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 411 false); 412 __skb_queue_tail(&local->pending[queue], skb); 413 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 414 false); 415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 416 } 417 418 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 419 struct sk_buff_head *skbs) 420 { 421 struct ieee80211_hw *hw = &local->hw; 422 struct sk_buff *skb; 423 unsigned long flags; 424 int queue, i; 425 426 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 427 while ((skb = skb_dequeue(skbs))) { 428 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 429 430 if (WARN_ON(!info->control.vif)) { 431 ieee80211_free_txskb(&local->hw, skb); 432 continue; 433 } 434 435 queue = info->hw_queue; 436 437 __ieee80211_stop_queue(hw, queue, 438 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 439 false); 440 441 __skb_queue_tail(&local->pending[queue], skb); 442 } 443 444 for (i = 0; i < hw->queues; i++) 445 __ieee80211_wake_queue(hw, i, 446 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 447 false); 448 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 449 } 450 451 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 452 unsigned long queues, 453 enum queue_stop_reason reason, 454 bool refcounted) 455 { 456 struct ieee80211_local *local = hw_to_local(hw); 457 unsigned long flags; 458 int i; 459 460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 461 462 for_each_set_bit(i, &queues, hw->queues) 463 __ieee80211_stop_queue(hw, i, reason, refcounted); 464 465 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 466 } 467 468 void ieee80211_stop_queues(struct ieee80211_hw *hw) 469 { 470 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 471 IEEE80211_QUEUE_STOP_REASON_DRIVER, 472 false); 473 } 474 EXPORT_SYMBOL(ieee80211_stop_queues); 475 476 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 477 { 478 struct ieee80211_local *local = hw_to_local(hw); 479 unsigned long flags; 480 int ret; 481 482 if (WARN_ON(queue >= hw->queues)) 483 return true; 484 485 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 486 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 487 &local->queue_stop_reasons[queue]); 488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 489 return ret; 490 } 491 EXPORT_SYMBOL(ieee80211_queue_stopped); 492 493 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 494 unsigned long queues, 495 enum queue_stop_reason reason, 496 bool refcounted) 497 { 498 struct ieee80211_local *local = hw_to_local(hw); 499 unsigned long flags; 500 int i; 501 502 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 503 504 for_each_set_bit(i, &queues, hw->queues) 505 __ieee80211_wake_queue(hw, i, reason, refcounted); 506 507 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 508 } 509 510 void ieee80211_wake_queues(struct ieee80211_hw *hw) 511 { 512 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 513 IEEE80211_QUEUE_STOP_REASON_DRIVER, 514 false); 515 } 516 EXPORT_SYMBOL(ieee80211_wake_queues); 517 518 static unsigned int 519 ieee80211_get_vif_queues(struct ieee80211_local *local, 520 struct ieee80211_sub_if_data *sdata) 521 { 522 unsigned int queues; 523 524 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 525 int ac; 526 527 queues = 0; 528 529 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 530 queues |= BIT(sdata->vif.hw_queue[ac]); 531 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 532 queues |= BIT(sdata->vif.cab_queue); 533 } else { 534 /* all queues */ 535 queues = BIT(local->hw.queues) - 1; 536 } 537 538 return queues; 539 } 540 541 void __ieee80211_flush_queues(struct ieee80211_local *local, 542 struct ieee80211_sub_if_data *sdata, 543 unsigned int queues, bool drop) 544 { 545 if (!local->ops->flush) 546 return; 547 548 /* 549 * If no queue was set, or if the HW doesn't support 550 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 551 */ 552 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 553 queues = ieee80211_get_vif_queues(local, sdata); 554 555 ieee80211_stop_queues_by_reason(&local->hw, queues, 556 IEEE80211_QUEUE_STOP_REASON_FLUSH, 557 false); 558 559 drv_flush(local, sdata, queues, drop); 560 561 ieee80211_wake_queues_by_reason(&local->hw, queues, 562 IEEE80211_QUEUE_STOP_REASON_FLUSH, 563 false); 564 } 565 566 void ieee80211_flush_queues(struct ieee80211_local *local, 567 struct ieee80211_sub_if_data *sdata, bool drop) 568 { 569 __ieee80211_flush_queues(local, sdata, 0, drop); 570 } 571 572 void ieee80211_stop_vif_queues(struct ieee80211_local *local, 573 struct ieee80211_sub_if_data *sdata, 574 enum queue_stop_reason reason) 575 { 576 ieee80211_stop_queues_by_reason(&local->hw, 577 ieee80211_get_vif_queues(local, sdata), 578 reason, true); 579 } 580 581 void ieee80211_wake_vif_queues(struct ieee80211_local *local, 582 struct ieee80211_sub_if_data *sdata, 583 enum queue_stop_reason reason) 584 { 585 ieee80211_wake_queues_by_reason(&local->hw, 586 ieee80211_get_vif_queues(local, sdata), 587 reason, true); 588 } 589 590 static void __iterate_interfaces(struct ieee80211_local *local, 591 u32 iter_flags, 592 void (*iterator)(void *data, u8 *mac, 593 struct ieee80211_vif *vif), 594 void *data) 595 { 596 struct ieee80211_sub_if_data *sdata; 597 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 598 599 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 600 switch (sdata->vif.type) { 601 case NL80211_IFTYPE_MONITOR: 602 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE)) 603 continue; 604 break; 605 case NL80211_IFTYPE_AP_VLAN: 606 continue; 607 default: 608 break; 609 } 610 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 611 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 612 continue; 613 if (ieee80211_sdata_running(sdata) || !active_only) 614 iterator(data, sdata->vif.addr, 615 &sdata->vif); 616 } 617 618 sdata = rcu_dereference_check(local->monitor_sdata, 619 lockdep_is_held(&local->iflist_mtx) || 620 lockdep_rtnl_is_held()); 621 if (sdata && 622 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 623 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 624 iterator(data, sdata->vif.addr, &sdata->vif); 625 } 626 627 void ieee80211_iterate_interfaces( 628 struct ieee80211_hw *hw, u32 iter_flags, 629 void (*iterator)(void *data, u8 *mac, 630 struct ieee80211_vif *vif), 631 void *data) 632 { 633 struct ieee80211_local *local = hw_to_local(hw); 634 635 mutex_lock(&local->iflist_mtx); 636 __iterate_interfaces(local, iter_flags, iterator, data); 637 mutex_unlock(&local->iflist_mtx); 638 } 639 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 640 641 void ieee80211_iterate_active_interfaces_atomic( 642 struct ieee80211_hw *hw, u32 iter_flags, 643 void (*iterator)(void *data, u8 *mac, 644 struct ieee80211_vif *vif), 645 void *data) 646 { 647 struct ieee80211_local *local = hw_to_local(hw); 648 649 rcu_read_lock(); 650 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 651 iterator, data); 652 rcu_read_unlock(); 653 } 654 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 655 656 void ieee80211_iterate_active_interfaces_rtnl( 657 struct ieee80211_hw *hw, u32 iter_flags, 658 void (*iterator)(void *data, u8 *mac, 659 struct ieee80211_vif *vif), 660 void *data) 661 { 662 struct ieee80211_local *local = hw_to_local(hw); 663 664 ASSERT_RTNL(); 665 666 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 667 iterator, data); 668 } 669 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl); 670 671 static void __iterate_stations(struct ieee80211_local *local, 672 void (*iterator)(void *data, 673 struct ieee80211_sta *sta), 674 void *data) 675 { 676 struct sta_info *sta; 677 678 list_for_each_entry_rcu(sta, &local->sta_list, list) { 679 if (!sta->uploaded) 680 continue; 681 682 iterator(data, &sta->sta); 683 } 684 } 685 686 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 687 void (*iterator)(void *data, 688 struct ieee80211_sta *sta), 689 void *data) 690 { 691 struct ieee80211_local *local = hw_to_local(hw); 692 693 rcu_read_lock(); 694 __iterate_stations(local, iterator, data); 695 rcu_read_unlock(); 696 } 697 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 698 699 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 700 { 701 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 702 703 if (!ieee80211_sdata_running(sdata) || 704 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 705 return NULL; 706 return &sdata->vif; 707 } 708 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 709 710 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 711 { 712 struct ieee80211_sub_if_data *sdata; 713 714 if (!vif) 715 return NULL; 716 717 sdata = vif_to_sdata(vif); 718 719 if (!ieee80211_sdata_running(sdata) || 720 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 721 return NULL; 722 723 return &sdata->wdev; 724 } 725 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 726 727 /* 728 * Nothing should have been stuffed into the workqueue during 729 * the suspend->resume cycle. Since we can't check each caller 730 * of this function if we are already quiescing / suspended, 731 * check here and don't WARN since this can actually happen when 732 * the rx path (for example) is racing against __ieee80211_suspend 733 * and suspending / quiescing was set after the rx path checked 734 * them. 735 */ 736 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 737 { 738 if (local->quiescing || (local->suspended && !local->resuming)) { 739 pr_warn("queueing ieee80211 work while going to suspend\n"); 740 return false; 741 } 742 743 return true; 744 } 745 746 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 747 { 748 struct ieee80211_local *local = hw_to_local(hw); 749 750 if (!ieee80211_can_queue_work(local)) 751 return; 752 753 queue_work(local->workqueue, work); 754 } 755 EXPORT_SYMBOL(ieee80211_queue_work); 756 757 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 758 struct delayed_work *dwork, 759 unsigned long delay) 760 { 761 struct ieee80211_local *local = hw_to_local(hw); 762 763 if (!ieee80211_can_queue_work(local)) 764 return; 765 766 queue_delayed_work(local->workqueue, dwork, delay); 767 } 768 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 769 770 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, 771 struct ieee802_11_elems *elems, 772 u64 filter, u32 crc) 773 { 774 size_t left = len; 775 const u8 *pos = start; 776 bool calc_crc = filter != 0; 777 DECLARE_BITMAP(seen_elems, 256); 778 const u8 *ie; 779 780 bitmap_zero(seen_elems, 256); 781 memset(elems, 0, sizeof(*elems)); 782 elems->ie_start = start; 783 elems->total_len = len; 784 785 while (left >= 2) { 786 u8 id, elen; 787 bool elem_parse_failed; 788 789 id = *pos++; 790 elen = *pos++; 791 left -= 2; 792 793 if (elen > left) { 794 elems->parse_error = true; 795 break; 796 } 797 798 switch (id) { 799 case WLAN_EID_SSID: 800 case WLAN_EID_SUPP_RATES: 801 case WLAN_EID_FH_PARAMS: 802 case WLAN_EID_DS_PARAMS: 803 case WLAN_EID_CF_PARAMS: 804 case WLAN_EID_TIM: 805 case WLAN_EID_IBSS_PARAMS: 806 case WLAN_EID_CHALLENGE: 807 case WLAN_EID_RSN: 808 case WLAN_EID_ERP_INFO: 809 case WLAN_EID_EXT_SUPP_RATES: 810 case WLAN_EID_HT_CAPABILITY: 811 case WLAN_EID_HT_OPERATION: 812 case WLAN_EID_VHT_CAPABILITY: 813 case WLAN_EID_VHT_OPERATION: 814 case WLAN_EID_MESH_ID: 815 case WLAN_EID_MESH_CONFIG: 816 case WLAN_EID_PEER_MGMT: 817 case WLAN_EID_PREQ: 818 case WLAN_EID_PREP: 819 case WLAN_EID_PERR: 820 case WLAN_EID_RANN: 821 case WLAN_EID_CHANNEL_SWITCH: 822 case WLAN_EID_EXT_CHANSWITCH_ANN: 823 case WLAN_EID_COUNTRY: 824 case WLAN_EID_PWR_CONSTRAINT: 825 case WLAN_EID_TIMEOUT_INTERVAL: 826 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 827 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 828 case WLAN_EID_CHAN_SWITCH_PARAM: 829 case WLAN_EID_EXT_CAPABILITY: 830 case WLAN_EID_CHAN_SWITCH_TIMING: 831 case WLAN_EID_LINK_ID: 832 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 833 /* 834 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible 835 * that if the content gets bigger it might be needed more than once 836 */ 837 if (test_bit(id, seen_elems)) { 838 elems->parse_error = true; 839 left -= elen; 840 pos += elen; 841 continue; 842 } 843 break; 844 } 845 846 if (calc_crc && id < 64 && (filter & (1ULL << id))) 847 crc = crc32_be(crc, pos - 2, elen + 2); 848 849 elem_parse_failed = false; 850 851 switch (id) { 852 case WLAN_EID_LINK_ID: 853 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) { 854 elem_parse_failed = true; 855 break; 856 } 857 elems->lnk_id = (void *)(pos - 2); 858 break; 859 case WLAN_EID_CHAN_SWITCH_TIMING: 860 if (elen != sizeof(struct ieee80211_ch_switch_timing)) { 861 elem_parse_failed = true; 862 break; 863 } 864 elems->ch_sw_timing = (void *)pos; 865 break; 866 case WLAN_EID_EXT_CAPABILITY: 867 elems->ext_capab = pos; 868 elems->ext_capab_len = elen; 869 break; 870 case WLAN_EID_SSID: 871 elems->ssid = pos; 872 elems->ssid_len = elen; 873 break; 874 case WLAN_EID_SUPP_RATES: 875 elems->supp_rates = pos; 876 elems->supp_rates_len = elen; 877 break; 878 case WLAN_EID_DS_PARAMS: 879 if (elen >= 1) 880 elems->ds_params = pos; 881 else 882 elem_parse_failed = true; 883 break; 884 case WLAN_EID_TIM: 885 if (elen >= sizeof(struct ieee80211_tim_ie)) { 886 elems->tim = (void *)pos; 887 elems->tim_len = elen; 888 } else 889 elem_parse_failed = true; 890 break; 891 case WLAN_EID_CHALLENGE: 892 elems->challenge = pos; 893 elems->challenge_len = elen; 894 break; 895 case WLAN_EID_VENDOR_SPECIFIC: 896 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && 897 pos[2] == 0xf2) { 898 /* Microsoft OUI (00:50:F2) */ 899 900 if (calc_crc) 901 crc = crc32_be(crc, pos - 2, elen + 2); 902 903 if (elen >= 5 && pos[3] == 2) { 904 /* OUI Type 2 - WMM IE */ 905 if (pos[4] == 0) { 906 elems->wmm_info = pos; 907 elems->wmm_info_len = elen; 908 } else if (pos[4] == 1) { 909 elems->wmm_param = pos; 910 elems->wmm_param_len = elen; 911 } 912 } 913 } 914 break; 915 case WLAN_EID_RSN: 916 elems->rsn = pos; 917 elems->rsn_len = elen; 918 break; 919 case WLAN_EID_ERP_INFO: 920 if (elen >= 1) 921 elems->erp_info = pos; 922 else 923 elem_parse_failed = true; 924 break; 925 case WLAN_EID_EXT_SUPP_RATES: 926 elems->ext_supp_rates = pos; 927 elems->ext_supp_rates_len = elen; 928 break; 929 case WLAN_EID_HT_CAPABILITY: 930 if (elen >= sizeof(struct ieee80211_ht_cap)) 931 elems->ht_cap_elem = (void *)pos; 932 else 933 elem_parse_failed = true; 934 break; 935 case WLAN_EID_HT_OPERATION: 936 if (elen >= sizeof(struct ieee80211_ht_operation)) 937 elems->ht_operation = (void *)pos; 938 else 939 elem_parse_failed = true; 940 break; 941 case WLAN_EID_VHT_CAPABILITY: 942 if (elen >= sizeof(struct ieee80211_vht_cap)) 943 elems->vht_cap_elem = (void *)pos; 944 else 945 elem_parse_failed = true; 946 break; 947 case WLAN_EID_VHT_OPERATION: 948 if (elen >= sizeof(struct ieee80211_vht_operation)) 949 elems->vht_operation = (void *)pos; 950 else 951 elem_parse_failed = true; 952 break; 953 case WLAN_EID_OPMODE_NOTIF: 954 if (elen > 0) 955 elems->opmode_notif = pos; 956 else 957 elem_parse_failed = true; 958 break; 959 case WLAN_EID_MESH_ID: 960 elems->mesh_id = pos; 961 elems->mesh_id_len = elen; 962 break; 963 case WLAN_EID_MESH_CONFIG: 964 if (elen >= sizeof(struct ieee80211_meshconf_ie)) 965 elems->mesh_config = (void *)pos; 966 else 967 elem_parse_failed = true; 968 break; 969 case WLAN_EID_PEER_MGMT: 970 elems->peering = pos; 971 elems->peering_len = elen; 972 break; 973 case WLAN_EID_MESH_AWAKE_WINDOW: 974 if (elen >= 2) 975 elems->awake_window = (void *)pos; 976 break; 977 case WLAN_EID_PREQ: 978 elems->preq = pos; 979 elems->preq_len = elen; 980 break; 981 case WLAN_EID_PREP: 982 elems->prep = pos; 983 elems->prep_len = elen; 984 break; 985 case WLAN_EID_PERR: 986 elems->perr = pos; 987 elems->perr_len = elen; 988 break; 989 case WLAN_EID_RANN: 990 if (elen >= sizeof(struct ieee80211_rann_ie)) 991 elems->rann = (void *)pos; 992 else 993 elem_parse_failed = true; 994 break; 995 case WLAN_EID_CHANNEL_SWITCH: 996 if (elen != sizeof(struct ieee80211_channel_sw_ie)) { 997 elem_parse_failed = true; 998 break; 999 } 1000 elems->ch_switch_ie = (void *)pos; 1001 break; 1002 case WLAN_EID_EXT_CHANSWITCH_ANN: 1003 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) { 1004 elem_parse_failed = true; 1005 break; 1006 } 1007 elems->ext_chansw_ie = (void *)pos; 1008 break; 1009 case WLAN_EID_SECONDARY_CHANNEL_OFFSET: 1010 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) { 1011 elem_parse_failed = true; 1012 break; 1013 } 1014 elems->sec_chan_offs = (void *)pos; 1015 break; 1016 case WLAN_EID_CHAN_SWITCH_PARAM: 1017 if (elen != 1018 sizeof(*elems->mesh_chansw_params_ie)) { 1019 elem_parse_failed = true; 1020 break; 1021 } 1022 elems->mesh_chansw_params_ie = (void *)pos; 1023 break; 1024 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH: 1025 if (!action || 1026 elen != sizeof(*elems->wide_bw_chansw_ie)) { 1027 elem_parse_failed = true; 1028 break; 1029 } 1030 elems->wide_bw_chansw_ie = (void *)pos; 1031 break; 1032 case WLAN_EID_CHANNEL_SWITCH_WRAPPER: 1033 if (action) { 1034 elem_parse_failed = true; 1035 break; 1036 } 1037 /* 1038 * This is a bit tricky, but as we only care about 1039 * the wide bandwidth channel switch element, so 1040 * just parse it out manually. 1041 */ 1042 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH, 1043 pos, elen); 1044 if (ie) { 1045 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie)) 1046 elems->wide_bw_chansw_ie = 1047 (void *)(ie + 2); 1048 else 1049 elem_parse_failed = true; 1050 } 1051 break; 1052 case WLAN_EID_COUNTRY: 1053 elems->country_elem = pos; 1054 elems->country_elem_len = elen; 1055 break; 1056 case WLAN_EID_PWR_CONSTRAINT: 1057 if (elen != 1) { 1058 elem_parse_failed = true; 1059 break; 1060 } 1061 elems->pwr_constr_elem = pos; 1062 break; 1063 case WLAN_EID_CISCO_VENDOR_SPECIFIC: 1064 /* Lots of different options exist, but we only care 1065 * about the Dynamic Transmit Power Control element. 1066 * First check for the Cisco OUI, then for the DTPC 1067 * tag (0x00). 1068 */ 1069 if (elen < 4) { 1070 elem_parse_failed = true; 1071 break; 1072 } 1073 1074 if (pos[0] != 0x00 || pos[1] != 0x40 || 1075 pos[2] != 0x96 || pos[3] != 0x00) 1076 break; 1077 1078 if (elen != 6) { 1079 elem_parse_failed = true; 1080 break; 1081 } 1082 1083 if (calc_crc) 1084 crc = crc32_be(crc, pos - 2, elen + 2); 1085 1086 elems->cisco_dtpc_elem = pos; 1087 break; 1088 case WLAN_EID_TIMEOUT_INTERVAL: 1089 if (elen >= sizeof(struct ieee80211_timeout_interval_ie)) 1090 elems->timeout_int = (void *)pos; 1091 else 1092 elem_parse_failed = true; 1093 break; 1094 case WLAN_EID_BSS_MAX_IDLE_PERIOD: 1095 if (elen >= sizeof(*elems->max_idle_period_ie)) 1096 elems->max_idle_period_ie = (void *)pos; 1097 break; 1098 case WLAN_EID_EXTENSION: 1099 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA && 1100 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) { 1101 elems->mu_edca_param_set = (void *)&pos[1]; 1102 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) { 1103 elems->he_cap = (void *)&pos[1]; 1104 elems->he_cap_len = elen - 1; 1105 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION && 1106 elen >= sizeof(*elems->he_operation) && 1107 elen >= ieee80211_he_oper_size(&pos[1])) { 1108 elems->he_operation = (void *)&pos[1]; 1109 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) { 1110 elems->uora_element = (void *)&pos[1]; 1111 } 1112 break; 1113 default: 1114 break; 1115 } 1116 1117 if (elem_parse_failed) 1118 elems->parse_error = true; 1119 else 1120 __set_bit(id, seen_elems); 1121 1122 left -= elen; 1123 pos += elen; 1124 } 1125 1126 if (left != 0) 1127 elems->parse_error = true; 1128 1129 return crc; 1130 } 1131 1132 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 1133 struct ieee80211_tx_queue_params 1134 *qparam, int ac) 1135 { 1136 struct ieee80211_chanctx_conf *chanctx_conf; 1137 const struct ieee80211_reg_rule *rrule; 1138 const struct ieee80211_wmm_ac *wmm_ac; 1139 u16 center_freq = 0; 1140 1141 if (sdata->vif.type != NL80211_IFTYPE_AP && 1142 sdata->vif.type != NL80211_IFTYPE_STATION) 1143 return; 1144 1145 rcu_read_lock(); 1146 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1147 if (chanctx_conf) 1148 center_freq = chanctx_conf->def.chan->center_freq; 1149 1150 if (!center_freq) { 1151 rcu_read_unlock(); 1152 return; 1153 } 1154 1155 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1156 1157 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1158 rcu_read_unlock(); 1159 return; 1160 } 1161 1162 if (sdata->vif.type == NL80211_IFTYPE_AP) 1163 wmm_ac = &rrule->wmm_rule.ap[ac]; 1164 else 1165 wmm_ac = &rrule->wmm_rule.client[ac]; 1166 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1167 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1168 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1169 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1170 rcu_read_unlock(); 1171 } 1172 1173 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1174 bool bss_notify, bool enable_qos) 1175 { 1176 struct ieee80211_local *local = sdata->local; 1177 struct ieee80211_tx_queue_params qparam; 1178 struct ieee80211_chanctx_conf *chanctx_conf; 1179 int ac; 1180 bool use_11b; 1181 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1182 int aCWmin, aCWmax; 1183 1184 if (!local->ops->conf_tx) 1185 return; 1186 1187 if (local->hw.queues < IEEE80211_NUM_ACS) 1188 return; 1189 1190 memset(&qparam, 0, sizeof(qparam)); 1191 1192 rcu_read_lock(); 1193 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1194 use_11b = (chanctx_conf && 1195 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1196 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1197 rcu_read_unlock(); 1198 1199 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1200 1201 /* Set defaults according to 802.11-2007 Table 7-37 */ 1202 aCWmax = 1023; 1203 if (use_11b) 1204 aCWmin = 31; 1205 else 1206 aCWmin = 15; 1207 1208 /* Confiure old 802.11b/g medium access rules. */ 1209 qparam.cw_max = aCWmax; 1210 qparam.cw_min = aCWmin; 1211 qparam.txop = 0; 1212 qparam.aifs = 2; 1213 1214 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1215 /* Update if QoS is enabled. */ 1216 if (enable_qos) { 1217 switch (ac) { 1218 case IEEE80211_AC_BK: 1219 qparam.cw_max = aCWmax; 1220 qparam.cw_min = aCWmin; 1221 qparam.txop = 0; 1222 if (is_ocb) 1223 qparam.aifs = 9; 1224 else 1225 qparam.aifs = 7; 1226 break; 1227 /* never happens but let's not leave undefined */ 1228 default: 1229 case IEEE80211_AC_BE: 1230 qparam.cw_max = aCWmax; 1231 qparam.cw_min = aCWmin; 1232 qparam.txop = 0; 1233 if (is_ocb) 1234 qparam.aifs = 6; 1235 else 1236 qparam.aifs = 3; 1237 break; 1238 case IEEE80211_AC_VI: 1239 qparam.cw_max = aCWmin; 1240 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1241 if (is_ocb) 1242 qparam.txop = 0; 1243 else if (use_11b) 1244 qparam.txop = 6016/32; 1245 else 1246 qparam.txop = 3008/32; 1247 1248 if (is_ocb) 1249 qparam.aifs = 3; 1250 else 1251 qparam.aifs = 2; 1252 break; 1253 case IEEE80211_AC_VO: 1254 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1255 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1256 if (is_ocb) 1257 qparam.txop = 0; 1258 else if (use_11b) 1259 qparam.txop = 3264/32; 1260 else 1261 qparam.txop = 1504/32; 1262 qparam.aifs = 2; 1263 break; 1264 } 1265 } 1266 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1267 1268 qparam.uapsd = false; 1269 1270 sdata->tx_conf[ac] = qparam; 1271 drv_conf_tx(local, sdata, ac, &qparam); 1272 } 1273 1274 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1275 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1276 sdata->vif.type != NL80211_IFTYPE_NAN) { 1277 sdata->vif.bss_conf.qos = enable_qos; 1278 if (bss_notify) 1279 ieee80211_bss_info_change_notify(sdata, 1280 BSS_CHANGED_QOS); 1281 } 1282 } 1283 1284 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1285 u16 transaction, u16 auth_alg, u16 status, 1286 const u8 *extra, size_t extra_len, const u8 *da, 1287 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1288 u32 tx_flags) 1289 { 1290 struct ieee80211_local *local = sdata->local; 1291 struct sk_buff *skb; 1292 struct ieee80211_mgmt *mgmt; 1293 int err; 1294 1295 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1296 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1297 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1298 if (!skb) 1299 return; 1300 1301 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1302 1303 mgmt = skb_put_zero(skb, 24 + 6); 1304 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1305 IEEE80211_STYPE_AUTH); 1306 memcpy(mgmt->da, da, ETH_ALEN); 1307 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1308 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1309 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1310 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1311 mgmt->u.auth.status_code = cpu_to_le16(status); 1312 if (extra) 1313 skb_put_data(skb, extra, extra_len); 1314 1315 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1316 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1317 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1318 WARN_ON(err); 1319 } 1320 1321 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1322 tx_flags; 1323 ieee80211_tx_skb(sdata, skb); 1324 } 1325 1326 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1327 const u8 *bssid, u16 stype, u16 reason, 1328 bool send_frame, u8 *frame_buf) 1329 { 1330 struct ieee80211_local *local = sdata->local; 1331 struct sk_buff *skb; 1332 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1333 1334 /* build frame */ 1335 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1336 mgmt->duration = 0; /* initialize only */ 1337 mgmt->seq_ctrl = 0; /* initialize only */ 1338 memcpy(mgmt->da, bssid, ETH_ALEN); 1339 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1340 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1341 /* u.deauth.reason_code == u.disassoc.reason_code */ 1342 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1343 1344 if (send_frame) { 1345 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1346 IEEE80211_DEAUTH_FRAME_LEN); 1347 if (!skb) 1348 return; 1349 1350 skb_reserve(skb, local->hw.extra_tx_headroom); 1351 1352 /* copy in frame */ 1353 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1354 1355 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1356 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1357 IEEE80211_SKB_CB(skb)->flags |= 1358 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1359 1360 ieee80211_tx_skb(sdata, skb); 1361 } 1362 } 1363 1364 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1365 u8 *buffer, size_t buffer_len, 1366 const u8 *ie, size_t ie_len, 1367 enum nl80211_band band, 1368 u32 rate_mask, 1369 struct cfg80211_chan_def *chandef, 1370 size_t *offset, u32 flags) 1371 { 1372 struct ieee80211_supported_band *sband; 1373 const struct ieee80211_sta_he_cap *he_cap; 1374 u8 *pos = buffer, *end = buffer + buffer_len; 1375 size_t noffset; 1376 int supp_rates_len, i; 1377 u8 rates[32]; 1378 int num_rates; 1379 int ext_rates_len; 1380 int shift; 1381 u32 rate_flags; 1382 bool have_80mhz = false; 1383 1384 *offset = 0; 1385 1386 sband = local->hw.wiphy->bands[band]; 1387 if (WARN_ON_ONCE(!sband)) 1388 return 0; 1389 1390 rate_flags = ieee80211_chandef_rate_flags(chandef); 1391 shift = ieee80211_chandef_get_shift(chandef); 1392 1393 num_rates = 0; 1394 for (i = 0; i < sband->n_bitrates; i++) { 1395 if ((BIT(i) & rate_mask) == 0) 1396 continue; /* skip rate */ 1397 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1398 continue; 1399 1400 rates[num_rates++] = 1401 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1402 (1 << shift) * 5); 1403 } 1404 1405 supp_rates_len = min_t(int, num_rates, 8); 1406 1407 if (end - pos < 2 + supp_rates_len) 1408 goto out_err; 1409 *pos++ = WLAN_EID_SUPP_RATES; 1410 *pos++ = supp_rates_len; 1411 memcpy(pos, rates, supp_rates_len); 1412 pos += supp_rates_len; 1413 1414 /* insert "request information" if in custom IEs */ 1415 if (ie && ie_len) { 1416 static const u8 before_extrates[] = { 1417 WLAN_EID_SSID, 1418 WLAN_EID_SUPP_RATES, 1419 WLAN_EID_REQUEST, 1420 }; 1421 noffset = ieee80211_ie_split(ie, ie_len, 1422 before_extrates, 1423 ARRAY_SIZE(before_extrates), 1424 *offset); 1425 if (end - pos < noffset - *offset) 1426 goto out_err; 1427 memcpy(pos, ie + *offset, noffset - *offset); 1428 pos += noffset - *offset; 1429 *offset = noffset; 1430 } 1431 1432 ext_rates_len = num_rates - supp_rates_len; 1433 if (ext_rates_len > 0) { 1434 if (end - pos < 2 + ext_rates_len) 1435 goto out_err; 1436 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1437 *pos++ = ext_rates_len; 1438 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1439 pos += ext_rates_len; 1440 } 1441 1442 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1443 if (end - pos < 3) 1444 goto out_err; 1445 *pos++ = WLAN_EID_DS_PARAMS; 1446 *pos++ = 1; 1447 *pos++ = ieee80211_frequency_to_channel( 1448 chandef->chan->center_freq); 1449 } 1450 1451 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1452 goto done; 1453 1454 /* insert custom IEs that go before HT */ 1455 if (ie && ie_len) { 1456 static const u8 before_ht[] = { 1457 /* 1458 * no need to list the ones split off already 1459 * (or generated here) 1460 */ 1461 WLAN_EID_DS_PARAMS, 1462 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1463 }; 1464 noffset = ieee80211_ie_split(ie, ie_len, 1465 before_ht, ARRAY_SIZE(before_ht), 1466 *offset); 1467 if (end - pos < noffset - *offset) 1468 goto out_err; 1469 memcpy(pos, ie + *offset, noffset - *offset); 1470 pos += noffset - *offset; 1471 *offset = noffset; 1472 } 1473 1474 if (sband->ht_cap.ht_supported) { 1475 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1476 goto out_err; 1477 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1478 sband->ht_cap.cap); 1479 } 1480 1481 /* insert custom IEs that go before VHT */ 1482 if (ie && ie_len) { 1483 static const u8 before_vht[] = { 1484 /* 1485 * no need to list the ones split off already 1486 * (or generated here) 1487 */ 1488 WLAN_EID_BSS_COEX_2040, 1489 WLAN_EID_EXT_CAPABILITY, 1490 WLAN_EID_SSID_LIST, 1491 WLAN_EID_CHANNEL_USAGE, 1492 WLAN_EID_INTERWORKING, 1493 WLAN_EID_MESH_ID, 1494 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1495 }; 1496 noffset = ieee80211_ie_split(ie, ie_len, 1497 before_vht, ARRAY_SIZE(before_vht), 1498 *offset); 1499 if (end - pos < noffset - *offset) 1500 goto out_err; 1501 memcpy(pos, ie + *offset, noffset - *offset); 1502 pos += noffset - *offset; 1503 *offset = noffset; 1504 } 1505 1506 /* Check if any channel in this sband supports at least 80 MHz */ 1507 for (i = 0; i < sband->n_channels; i++) { 1508 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1509 IEEE80211_CHAN_NO_80MHZ)) 1510 continue; 1511 1512 have_80mhz = true; 1513 break; 1514 } 1515 1516 if (sband->vht_cap.vht_supported && have_80mhz) { 1517 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1518 goto out_err; 1519 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1520 sband->vht_cap.cap); 1521 } 1522 1523 /* insert custom IEs that go before HE */ 1524 if (ie && ie_len) { 1525 static const u8 before_he[] = { 1526 /* 1527 * no need to list the ones split off before VHT 1528 * or generated here 1529 */ 1530 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1531 WLAN_EID_AP_CSN, 1532 /* TODO: add 11ah/11aj/11ak elements */ 1533 }; 1534 noffset = ieee80211_ie_split(ie, ie_len, 1535 before_he, ARRAY_SIZE(before_he), 1536 *offset); 1537 if (end - pos < noffset - *offset) 1538 goto out_err; 1539 memcpy(pos, ie + *offset, noffset - *offset); 1540 pos += noffset - *offset; 1541 *offset = noffset; 1542 } 1543 1544 he_cap = ieee80211_get_he_sta_cap(sband); 1545 if (he_cap) { 1546 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1547 if (!pos) 1548 goto out_err; 1549 } 1550 1551 /* 1552 * If adding more here, adjust code in main.c 1553 * that calculates local->scan_ies_len. 1554 */ 1555 1556 return pos - buffer; 1557 out_err: 1558 WARN_ONCE(1, "not enough space for preq IEs\n"); 1559 done: 1560 return pos - buffer; 1561 } 1562 1563 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1564 size_t buffer_len, 1565 struct ieee80211_scan_ies *ie_desc, 1566 const u8 *ie, size_t ie_len, 1567 u8 bands_used, u32 *rate_masks, 1568 struct cfg80211_chan_def *chandef, 1569 u32 flags) 1570 { 1571 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1572 int i; 1573 1574 memset(ie_desc, 0, sizeof(*ie_desc)); 1575 1576 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1577 if (bands_used & BIT(i)) { 1578 pos += ieee80211_build_preq_ies_band(local, 1579 buffer + pos, 1580 buffer_len - pos, 1581 ie, ie_len, i, 1582 rate_masks[i], 1583 chandef, 1584 &custom_ie_offset, 1585 flags); 1586 ie_desc->ies[i] = buffer + old_pos; 1587 ie_desc->len[i] = pos - old_pos; 1588 old_pos = pos; 1589 } 1590 } 1591 1592 /* add any remaining custom IEs */ 1593 if (ie && ie_len) { 1594 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1595 "not enough space for preq custom IEs\n")) 1596 return pos; 1597 memcpy(buffer + pos, ie + custom_ie_offset, 1598 ie_len - custom_ie_offset); 1599 ie_desc->common_ies = buffer + pos; 1600 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1601 pos += ie_len - custom_ie_offset; 1602 } 1603 1604 return pos; 1605 }; 1606 1607 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1608 const u8 *src, const u8 *dst, 1609 u32 ratemask, 1610 struct ieee80211_channel *chan, 1611 const u8 *ssid, size_t ssid_len, 1612 const u8 *ie, size_t ie_len, 1613 u32 flags) 1614 { 1615 struct ieee80211_local *local = sdata->local; 1616 struct cfg80211_chan_def chandef; 1617 struct sk_buff *skb; 1618 struct ieee80211_mgmt *mgmt; 1619 int ies_len; 1620 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1621 struct ieee80211_scan_ies dummy_ie_desc; 1622 1623 /* 1624 * Do not send DS Channel parameter for directed probe requests 1625 * in order to maximize the chance that we get a response. Some 1626 * badly-behaved APs don't respond when this parameter is included. 1627 */ 1628 chandef.width = sdata->vif.bss_conf.chandef.width; 1629 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1630 chandef.chan = NULL; 1631 else 1632 chandef.chan = chan; 1633 1634 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1635 100 + ie_len); 1636 if (!skb) 1637 return NULL; 1638 1639 rate_masks[chan->band] = ratemask; 1640 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1641 skb_tailroom(skb), &dummy_ie_desc, 1642 ie, ie_len, BIT(chan->band), 1643 rate_masks, &chandef, flags); 1644 skb_put(skb, ies_len); 1645 1646 if (dst) { 1647 mgmt = (struct ieee80211_mgmt *) skb->data; 1648 memcpy(mgmt->da, dst, ETH_ALEN); 1649 memcpy(mgmt->bssid, dst, ETH_ALEN); 1650 } 1651 1652 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1653 1654 return skb; 1655 } 1656 1657 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1658 struct ieee802_11_elems *elems, 1659 enum nl80211_band band, u32 *basic_rates) 1660 { 1661 struct ieee80211_supported_band *sband; 1662 size_t num_rates; 1663 u32 supp_rates, rate_flags; 1664 int i, j, shift; 1665 1666 sband = sdata->local->hw.wiphy->bands[band]; 1667 if (WARN_ON(!sband)) 1668 return 1; 1669 1670 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1671 shift = ieee80211_vif_get_shift(&sdata->vif); 1672 1673 num_rates = sband->n_bitrates; 1674 supp_rates = 0; 1675 for (i = 0; i < elems->supp_rates_len + 1676 elems->ext_supp_rates_len; i++) { 1677 u8 rate = 0; 1678 int own_rate; 1679 bool is_basic; 1680 if (i < elems->supp_rates_len) 1681 rate = elems->supp_rates[i]; 1682 else if (elems->ext_supp_rates) 1683 rate = elems->ext_supp_rates 1684 [i - elems->supp_rates_len]; 1685 own_rate = 5 * (rate & 0x7f); 1686 is_basic = !!(rate & 0x80); 1687 1688 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1689 continue; 1690 1691 for (j = 0; j < num_rates; j++) { 1692 int brate; 1693 if ((rate_flags & sband->bitrates[j].flags) 1694 != rate_flags) 1695 continue; 1696 1697 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1698 1 << shift); 1699 1700 if (brate == own_rate) { 1701 supp_rates |= BIT(j); 1702 if (basic_rates && is_basic) 1703 *basic_rates |= BIT(j); 1704 } 1705 } 1706 } 1707 return supp_rates; 1708 } 1709 1710 void ieee80211_stop_device(struct ieee80211_local *local) 1711 { 1712 ieee80211_led_radio(local, false); 1713 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1714 1715 cancel_work_sync(&local->reconfig_filter); 1716 1717 flush_workqueue(local->workqueue); 1718 drv_stop(local); 1719 } 1720 1721 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1722 bool aborted) 1723 { 1724 /* It's possible that we don't handle the scan completion in 1725 * time during suspend, so if it's still marked as completed 1726 * here, queue the work and flush it to clean things up. 1727 * Instead of calling the worker function directly here, we 1728 * really queue it to avoid potential races with other flows 1729 * scheduling the same work. 1730 */ 1731 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1732 /* If coming from reconfiguration failure, abort the scan so 1733 * we don't attempt to continue a partial HW scan - which is 1734 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1735 * completed scan, and a 5 GHz portion is still pending. 1736 */ 1737 if (aborted) 1738 set_bit(SCAN_ABORTED, &local->scanning); 1739 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1740 flush_delayed_work(&local->scan_work); 1741 } 1742 } 1743 1744 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1745 { 1746 struct ieee80211_sub_if_data *sdata; 1747 struct ieee80211_chanctx *ctx; 1748 1749 /* 1750 * We get here if during resume the device can't be restarted properly. 1751 * We might also get here if this happens during HW reset, which is a 1752 * slightly different situation and we need to drop all connections in 1753 * the latter case. 1754 * 1755 * Ask cfg80211 to turn off all interfaces, this will result in more 1756 * warnings but at least we'll then get into a clean stopped state. 1757 */ 1758 1759 local->resuming = false; 1760 local->suspended = false; 1761 local->in_reconfig = false; 1762 1763 ieee80211_flush_completed_scan(local, true); 1764 1765 /* scheduled scan clearly can't be running any more, but tell 1766 * cfg80211 and clear local state 1767 */ 1768 ieee80211_sched_scan_end(local); 1769 1770 list_for_each_entry(sdata, &local->interfaces, list) 1771 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1772 1773 /* Mark channel contexts as not being in the driver any more to avoid 1774 * removing them from the driver during the shutdown process... 1775 */ 1776 mutex_lock(&local->chanctx_mtx); 1777 list_for_each_entry(ctx, &local->chanctx_list, list) 1778 ctx->driver_present = false; 1779 mutex_unlock(&local->chanctx_mtx); 1780 1781 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1782 } 1783 1784 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1785 struct ieee80211_sub_if_data *sdata) 1786 { 1787 struct ieee80211_chanctx_conf *conf; 1788 struct ieee80211_chanctx *ctx; 1789 1790 if (!local->use_chanctx) 1791 return; 1792 1793 mutex_lock(&local->chanctx_mtx); 1794 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1795 lockdep_is_held(&local->chanctx_mtx)); 1796 if (conf) { 1797 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1798 drv_assign_vif_chanctx(local, sdata, ctx); 1799 } 1800 mutex_unlock(&local->chanctx_mtx); 1801 } 1802 1803 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1804 { 1805 struct ieee80211_local *local = sdata->local; 1806 struct sta_info *sta; 1807 1808 /* add STAs back */ 1809 mutex_lock(&local->sta_mtx); 1810 list_for_each_entry(sta, &local->sta_list, list) { 1811 enum ieee80211_sta_state state; 1812 1813 if (!sta->uploaded || sta->sdata != sdata) 1814 continue; 1815 1816 for (state = IEEE80211_STA_NOTEXIST; 1817 state < sta->sta_state; state++) 1818 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1819 state + 1)); 1820 } 1821 mutex_unlock(&local->sta_mtx); 1822 } 1823 1824 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1825 { 1826 struct cfg80211_nan_func *func, **funcs; 1827 int res, id, i = 0; 1828 1829 res = drv_start_nan(sdata->local, sdata, 1830 &sdata->u.nan.conf); 1831 if (WARN_ON(res)) 1832 return res; 1833 1834 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 1835 sizeof(*funcs), 1836 GFP_KERNEL); 1837 if (!funcs) 1838 return -ENOMEM; 1839 1840 /* Add all the functions: 1841 * This is a little bit ugly. We need to call a potentially sleeping 1842 * callback for each NAN function, so we can't hold the spinlock. 1843 */ 1844 spin_lock_bh(&sdata->u.nan.func_lock); 1845 1846 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 1847 funcs[i++] = func; 1848 1849 spin_unlock_bh(&sdata->u.nan.func_lock); 1850 1851 for (i = 0; funcs[i]; i++) { 1852 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1853 if (WARN_ON(res)) 1854 ieee80211_nan_func_terminated(&sdata->vif, 1855 funcs[i]->instance_id, 1856 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1857 GFP_KERNEL); 1858 } 1859 1860 kfree(funcs); 1861 1862 return 0; 1863 } 1864 1865 int ieee80211_reconfig(struct ieee80211_local *local) 1866 { 1867 struct ieee80211_hw *hw = &local->hw; 1868 struct ieee80211_sub_if_data *sdata; 1869 struct ieee80211_chanctx *ctx; 1870 struct sta_info *sta; 1871 int res, i; 1872 bool reconfig_due_to_wowlan = false; 1873 struct ieee80211_sub_if_data *sched_scan_sdata; 1874 struct cfg80211_sched_scan_request *sched_scan_req; 1875 bool sched_scan_stopped = false; 1876 bool suspended = local->suspended; 1877 1878 /* nothing to do if HW shouldn't run */ 1879 if (!local->open_count) 1880 goto wake_up; 1881 1882 #ifdef CONFIG_PM 1883 if (suspended) 1884 local->resuming = true; 1885 1886 if (local->wowlan) { 1887 /* 1888 * In the wowlan case, both mac80211 and the device 1889 * are functional when the resume op is called, so 1890 * clear local->suspended so the device could operate 1891 * normally (e.g. pass rx frames). 1892 */ 1893 local->suspended = false; 1894 res = drv_resume(local); 1895 local->wowlan = false; 1896 if (res < 0) { 1897 local->resuming = false; 1898 return res; 1899 } 1900 if (res == 0) 1901 goto wake_up; 1902 WARN_ON(res > 1); 1903 /* 1904 * res is 1, which means the driver requested 1905 * to go through a regular reset on wakeup. 1906 * restore local->suspended in this case. 1907 */ 1908 reconfig_due_to_wowlan = true; 1909 local->suspended = true; 1910 } 1911 #endif 1912 1913 /* 1914 * In case of hw_restart during suspend (without wowlan), 1915 * cancel restart work, as we are reconfiguring the device 1916 * anyway. 1917 * Note that restart_work is scheduled on a frozen workqueue, 1918 * so we can't deadlock in this case. 1919 */ 1920 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1921 cancel_work_sync(&local->restart_work); 1922 1923 local->started = false; 1924 1925 /* 1926 * Upon resume hardware can sometimes be goofy due to 1927 * various platform / driver / bus issues, so restarting 1928 * the device may at times not work immediately. Propagate 1929 * the error. 1930 */ 1931 res = drv_start(local); 1932 if (res) { 1933 if (suspended) 1934 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1935 else 1936 WARN(1, "Hardware became unavailable during restart.\n"); 1937 ieee80211_handle_reconfig_failure(local); 1938 return res; 1939 } 1940 1941 /* setup fragmentation threshold */ 1942 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1943 1944 /* setup RTS threshold */ 1945 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1946 1947 /* reset coverage class */ 1948 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1949 1950 ieee80211_led_radio(local, true); 1951 ieee80211_mod_tpt_led_trig(local, 1952 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1953 1954 /* add interfaces */ 1955 sdata = rtnl_dereference(local->monitor_sdata); 1956 if (sdata) { 1957 /* in HW restart it exists already */ 1958 WARN_ON(local->resuming); 1959 res = drv_add_interface(local, sdata); 1960 if (WARN_ON(res)) { 1961 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1962 synchronize_net(); 1963 kfree(sdata); 1964 } 1965 } 1966 1967 list_for_each_entry(sdata, &local->interfaces, list) { 1968 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1969 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1970 ieee80211_sdata_running(sdata)) { 1971 res = drv_add_interface(local, sdata); 1972 if (WARN_ON(res)) 1973 break; 1974 } 1975 } 1976 1977 /* If adding any of the interfaces failed above, roll back and 1978 * report failure. 1979 */ 1980 if (res) { 1981 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1982 list) 1983 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1984 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1985 ieee80211_sdata_running(sdata)) 1986 drv_remove_interface(local, sdata); 1987 ieee80211_handle_reconfig_failure(local); 1988 return res; 1989 } 1990 1991 /* add channel contexts */ 1992 if (local->use_chanctx) { 1993 mutex_lock(&local->chanctx_mtx); 1994 list_for_each_entry(ctx, &local->chanctx_list, list) 1995 if (ctx->replace_state != 1996 IEEE80211_CHANCTX_REPLACES_OTHER) 1997 WARN_ON(drv_add_chanctx(local, ctx)); 1998 mutex_unlock(&local->chanctx_mtx); 1999 2000 sdata = rtnl_dereference(local->monitor_sdata); 2001 if (sdata && ieee80211_sdata_running(sdata)) 2002 ieee80211_assign_chanctx(local, sdata); 2003 } 2004 2005 /* reconfigure hardware */ 2006 ieee80211_hw_config(local, ~0); 2007 2008 ieee80211_configure_filter(local); 2009 2010 /* Finally also reconfigure all the BSS information */ 2011 list_for_each_entry(sdata, &local->interfaces, list) { 2012 u32 changed; 2013 2014 if (!ieee80211_sdata_running(sdata)) 2015 continue; 2016 2017 ieee80211_assign_chanctx(local, sdata); 2018 2019 switch (sdata->vif.type) { 2020 case NL80211_IFTYPE_AP_VLAN: 2021 case NL80211_IFTYPE_MONITOR: 2022 break; 2023 default: 2024 ieee80211_reconfig_stations(sdata); 2025 /* fall through */ 2026 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2027 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2028 drv_conf_tx(local, sdata, i, 2029 &sdata->tx_conf[i]); 2030 break; 2031 } 2032 2033 /* common change flags for all interface types */ 2034 changed = BSS_CHANGED_ERP_CTS_PROT | 2035 BSS_CHANGED_ERP_PREAMBLE | 2036 BSS_CHANGED_ERP_SLOT | 2037 BSS_CHANGED_HT | 2038 BSS_CHANGED_BASIC_RATES | 2039 BSS_CHANGED_BEACON_INT | 2040 BSS_CHANGED_BSSID | 2041 BSS_CHANGED_CQM | 2042 BSS_CHANGED_QOS | 2043 BSS_CHANGED_IDLE | 2044 BSS_CHANGED_TXPOWER | 2045 BSS_CHANGED_MCAST_RATE; 2046 2047 if (sdata->vif.mu_mimo_owner) 2048 changed |= BSS_CHANGED_MU_GROUPS; 2049 2050 switch (sdata->vif.type) { 2051 case NL80211_IFTYPE_STATION: 2052 changed |= BSS_CHANGED_ASSOC | 2053 BSS_CHANGED_ARP_FILTER | 2054 BSS_CHANGED_PS; 2055 2056 /* Re-send beacon info report to the driver */ 2057 if (sdata->u.mgd.have_beacon) 2058 changed |= BSS_CHANGED_BEACON_INFO; 2059 2060 if (sdata->vif.bss_conf.max_idle_period || 2061 sdata->vif.bss_conf.protected_keep_alive) 2062 changed |= BSS_CHANGED_KEEP_ALIVE; 2063 2064 sdata_lock(sdata); 2065 ieee80211_bss_info_change_notify(sdata, changed); 2066 sdata_unlock(sdata); 2067 break; 2068 case NL80211_IFTYPE_OCB: 2069 changed |= BSS_CHANGED_OCB; 2070 ieee80211_bss_info_change_notify(sdata, changed); 2071 break; 2072 case NL80211_IFTYPE_ADHOC: 2073 changed |= BSS_CHANGED_IBSS; 2074 /* fall through */ 2075 case NL80211_IFTYPE_AP: 2076 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2077 2078 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2079 changed |= BSS_CHANGED_AP_PROBE_RESP; 2080 2081 if (rcu_access_pointer(sdata->u.ap.beacon)) 2082 drv_start_ap(local, sdata); 2083 } 2084 2085 /* fall through */ 2086 case NL80211_IFTYPE_MESH_POINT: 2087 if (sdata->vif.bss_conf.enable_beacon) { 2088 changed |= BSS_CHANGED_BEACON | 2089 BSS_CHANGED_BEACON_ENABLED; 2090 ieee80211_bss_info_change_notify(sdata, changed); 2091 } 2092 break; 2093 case NL80211_IFTYPE_NAN: 2094 res = ieee80211_reconfig_nan(sdata); 2095 if (res < 0) { 2096 ieee80211_handle_reconfig_failure(local); 2097 return res; 2098 } 2099 break; 2100 case NL80211_IFTYPE_WDS: 2101 case NL80211_IFTYPE_AP_VLAN: 2102 case NL80211_IFTYPE_MONITOR: 2103 case NL80211_IFTYPE_P2P_DEVICE: 2104 /* nothing to do */ 2105 break; 2106 case NL80211_IFTYPE_UNSPECIFIED: 2107 case NUM_NL80211_IFTYPES: 2108 case NL80211_IFTYPE_P2P_CLIENT: 2109 case NL80211_IFTYPE_P2P_GO: 2110 WARN_ON(1); 2111 break; 2112 } 2113 } 2114 2115 ieee80211_recalc_ps(local); 2116 2117 /* 2118 * The sta might be in psm against the ap (e.g. because 2119 * this was the state before a hw restart), so we 2120 * explicitly send a null packet in order to make sure 2121 * it'll sync against the ap (and get out of psm). 2122 */ 2123 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2124 list_for_each_entry(sdata, &local->interfaces, list) { 2125 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2126 continue; 2127 if (!sdata->u.mgd.associated) 2128 continue; 2129 2130 ieee80211_send_nullfunc(local, sdata, false); 2131 } 2132 } 2133 2134 /* APs are now beaconing, add back stations */ 2135 mutex_lock(&local->sta_mtx); 2136 list_for_each_entry(sta, &local->sta_list, list) { 2137 enum ieee80211_sta_state state; 2138 2139 if (!sta->uploaded) 2140 continue; 2141 2142 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2143 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2144 continue; 2145 2146 for (state = IEEE80211_STA_NOTEXIST; 2147 state < sta->sta_state; state++) 2148 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2149 state + 1)); 2150 } 2151 mutex_unlock(&local->sta_mtx); 2152 2153 /* add back keys */ 2154 list_for_each_entry(sdata, &local->interfaces, list) 2155 ieee80211_reset_crypto_tx_tailroom(sdata); 2156 2157 list_for_each_entry(sdata, &local->interfaces, list) 2158 if (ieee80211_sdata_running(sdata)) 2159 ieee80211_enable_keys(sdata); 2160 2161 /* Reconfigure sched scan if it was interrupted by FW restart */ 2162 mutex_lock(&local->mtx); 2163 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2164 lockdep_is_held(&local->mtx)); 2165 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2166 lockdep_is_held(&local->mtx)); 2167 if (sched_scan_sdata && sched_scan_req) 2168 /* 2169 * Sched scan stopped, but we don't want to report it. Instead, 2170 * we're trying to reschedule. However, if more than one scan 2171 * plan was set, we cannot reschedule since we don't know which 2172 * scan plan was currently running (and some scan plans may have 2173 * already finished). 2174 */ 2175 if (sched_scan_req->n_scan_plans > 1 || 2176 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2177 sched_scan_req)) { 2178 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2179 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2180 sched_scan_stopped = true; 2181 } 2182 mutex_unlock(&local->mtx); 2183 2184 if (sched_scan_stopped) 2185 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2186 2187 wake_up: 2188 2189 if (local->monitors == local->open_count && local->monitors > 0) 2190 ieee80211_add_virtual_monitor(local); 2191 2192 /* 2193 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2194 * sessions can be established after a resume. 2195 * 2196 * Also tear down aggregation sessions since reconfiguring 2197 * them in a hardware restart scenario is not easily done 2198 * right now, and the hardware will have lost information 2199 * about the sessions, but we and the AP still think they 2200 * are active. This is really a workaround though. 2201 */ 2202 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2203 mutex_lock(&local->sta_mtx); 2204 2205 list_for_each_entry(sta, &local->sta_list, list) { 2206 if (!local->resuming) 2207 ieee80211_sta_tear_down_BA_sessions( 2208 sta, AGG_STOP_LOCAL_REQUEST); 2209 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2210 } 2211 2212 mutex_unlock(&local->sta_mtx); 2213 } 2214 2215 if (local->in_reconfig) { 2216 local->in_reconfig = false; 2217 barrier(); 2218 2219 /* Restart deferred ROCs */ 2220 mutex_lock(&local->mtx); 2221 ieee80211_start_next_roc(local); 2222 mutex_unlock(&local->mtx); 2223 } 2224 2225 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2226 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2227 false); 2228 2229 /* 2230 * If this is for hw restart things are still running. 2231 * We may want to change that later, however. 2232 */ 2233 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2234 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2235 2236 if (!suspended) 2237 return 0; 2238 2239 #ifdef CONFIG_PM 2240 /* first set suspended false, then resuming */ 2241 local->suspended = false; 2242 mb(); 2243 local->resuming = false; 2244 2245 ieee80211_flush_completed_scan(local, false); 2246 2247 if (local->open_count && !reconfig_due_to_wowlan) 2248 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2249 2250 list_for_each_entry(sdata, &local->interfaces, list) { 2251 if (!ieee80211_sdata_running(sdata)) 2252 continue; 2253 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2254 ieee80211_sta_restart(sdata); 2255 } 2256 2257 mod_timer(&local->sta_cleanup, jiffies + 1); 2258 #else 2259 WARN_ON(1); 2260 #endif 2261 2262 return 0; 2263 } 2264 2265 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2266 { 2267 struct ieee80211_sub_if_data *sdata; 2268 struct ieee80211_local *local; 2269 struct ieee80211_key *key; 2270 2271 if (WARN_ON(!vif)) 2272 return; 2273 2274 sdata = vif_to_sdata(vif); 2275 local = sdata->local; 2276 2277 if (WARN_ON(!local->resuming)) 2278 return; 2279 2280 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2281 return; 2282 2283 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2284 2285 mutex_lock(&local->key_mtx); 2286 list_for_each_entry(key, &sdata->key_list, list) 2287 key->flags |= KEY_FLAG_TAINTED; 2288 mutex_unlock(&local->key_mtx); 2289 } 2290 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2291 2292 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2293 { 2294 struct ieee80211_local *local = sdata->local; 2295 struct ieee80211_chanctx_conf *chanctx_conf; 2296 struct ieee80211_chanctx *chanctx; 2297 2298 mutex_lock(&local->chanctx_mtx); 2299 2300 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2301 lockdep_is_held(&local->chanctx_mtx)); 2302 2303 /* 2304 * This function can be called from a work, thus it may be possible 2305 * that the chanctx_conf is removed (due to a disconnection, for 2306 * example). 2307 * So nothing should be done in such case. 2308 */ 2309 if (!chanctx_conf) 2310 goto unlock; 2311 2312 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2313 ieee80211_recalc_smps_chanctx(local, chanctx); 2314 unlock: 2315 mutex_unlock(&local->chanctx_mtx); 2316 } 2317 2318 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2319 { 2320 struct ieee80211_local *local = sdata->local; 2321 struct ieee80211_chanctx_conf *chanctx_conf; 2322 struct ieee80211_chanctx *chanctx; 2323 2324 mutex_lock(&local->chanctx_mtx); 2325 2326 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2327 lockdep_is_held(&local->chanctx_mtx)); 2328 2329 if (WARN_ON_ONCE(!chanctx_conf)) 2330 goto unlock; 2331 2332 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2333 ieee80211_recalc_chanctx_min_def(local, chanctx); 2334 unlock: 2335 mutex_unlock(&local->chanctx_mtx); 2336 } 2337 2338 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2339 { 2340 size_t pos = offset; 2341 2342 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2343 pos += 2 + ies[pos + 1]; 2344 2345 return pos; 2346 } 2347 2348 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2349 int rssi_min_thold, 2350 int rssi_max_thold) 2351 { 2352 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2353 2354 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2355 return; 2356 2357 /* 2358 * Scale up threshold values before storing it, as the RSSI averaging 2359 * algorithm uses a scaled up value as well. Change this scaling 2360 * factor if the RSSI averaging algorithm changes. 2361 */ 2362 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2363 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2364 } 2365 2366 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2367 int rssi_min_thold, 2368 int rssi_max_thold) 2369 { 2370 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2371 2372 WARN_ON(rssi_min_thold == rssi_max_thold || 2373 rssi_min_thold > rssi_max_thold); 2374 2375 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2376 rssi_max_thold); 2377 } 2378 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2379 2380 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2381 { 2382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2383 2384 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2385 } 2386 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2387 2388 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2389 u16 cap) 2390 { 2391 __le16 tmp; 2392 2393 *pos++ = WLAN_EID_HT_CAPABILITY; 2394 *pos++ = sizeof(struct ieee80211_ht_cap); 2395 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2396 2397 /* capability flags */ 2398 tmp = cpu_to_le16(cap); 2399 memcpy(pos, &tmp, sizeof(u16)); 2400 pos += sizeof(u16); 2401 2402 /* AMPDU parameters */ 2403 *pos++ = ht_cap->ampdu_factor | 2404 (ht_cap->ampdu_density << 2405 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2406 2407 /* MCS set */ 2408 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2409 pos += sizeof(ht_cap->mcs); 2410 2411 /* extended capabilities */ 2412 pos += sizeof(__le16); 2413 2414 /* BF capabilities */ 2415 pos += sizeof(__le32); 2416 2417 /* antenna selection */ 2418 pos += sizeof(u8); 2419 2420 return pos; 2421 } 2422 2423 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2424 u32 cap) 2425 { 2426 __le32 tmp; 2427 2428 *pos++ = WLAN_EID_VHT_CAPABILITY; 2429 *pos++ = sizeof(struct ieee80211_vht_cap); 2430 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2431 2432 /* capability flags */ 2433 tmp = cpu_to_le32(cap); 2434 memcpy(pos, &tmp, sizeof(u32)); 2435 pos += sizeof(u32); 2436 2437 /* VHT MCS set */ 2438 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2439 pos += sizeof(vht_cap->vht_mcs); 2440 2441 return pos; 2442 } 2443 2444 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2445 const struct ieee80211_sta_he_cap *he_cap, 2446 u8 *end) 2447 { 2448 u8 n; 2449 u8 ie_len; 2450 u8 *orig_pos = pos; 2451 2452 /* Make sure we have place for the IE */ 2453 /* 2454 * TODO: the 1 added is because this temporarily is under the EXTENSION 2455 * IE. Get rid of it when it moves. 2456 */ 2457 if (!he_cap) 2458 return orig_pos; 2459 2460 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2461 ie_len = 2 + 1 + 2462 sizeof(he_cap->he_cap_elem) + n + 2463 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2464 he_cap->he_cap_elem.phy_cap_info); 2465 2466 if ((end - pos) < ie_len) 2467 return orig_pos; 2468 2469 *pos++ = WLAN_EID_EXTENSION; 2470 pos++; /* We'll set the size later below */ 2471 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2472 2473 /* Fixed data */ 2474 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2475 pos += sizeof(he_cap->he_cap_elem); 2476 2477 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2478 pos += n; 2479 2480 /* Check if PPE Threshold should be present */ 2481 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2482 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2483 goto end; 2484 2485 /* 2486 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2487 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2488 */ 2489 n = hweight8(he_cap->ppe_thres[0] & 2490 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2491 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2492 IEEE80211_PPE_THRES_NSS_POS)); 2493 2494 /* 2495 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2496 * total size. 2497 */ 2498 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2499 n = DIV_ROUND_UP(n, 8); 2500 2501 /* Copy PPE Thresholds */ 2502 memcpy(pos, &he_cap->ppe_thres, n); 2503 pos += n; 2504 2505 end: 2506 orig_pos[1] = (pos - orig_pos) - 2; 2507 return pos; 2508 } 2509 2510 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2511 const struct cfg80211_chan_def *chandef, 2512 u16 prot_mode, bool rifs_mode) 2513 { 2514 struct ieee80211_ht_operation *ht_oper; 2515 /* Build HT Information */ 2516 *pos++ = WLAN_EID_HT_OPERATION; 2517 *pos++ = sizeof(struct ieee80211_ht_operation); 2518 ht_oper = (struct ieee80211_ht_operation *)pos; 2519 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2520 chandef->chan->center_freq); 2521 switch (chandef->width) { 2522 case NL80211_CHAN_WIDTH_160: 2523 case NL80211_CHAN_WIDTH_80P80: 2524 case NL80211_CHAN_WIDTH_80: 2525 case NL80211_CHAN_WIDTH_40: 2526 if (chandef->center_freq1 > chandef->chan->center_freq) 2527 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2528 else 2529 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2530 break; 2531 default: 2532 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2533 break; 2534 } 2535 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2536 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2537 chandef->width != NL80211_CHAN_WIDTH_20) 2538 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2539 2540 if (rifs_mode) 2541 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2542 2543 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2544 ht_oper->stbc_param = 0x0000; 2545 2546 /* It seems that Basic MCS set and Supported MCS set 2547 are identical for the first 10 bytes */ 2548 memset(&ht_oper->basic_set, 0, 16); 2549 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2550 2551 return pos + sizeof(struct ieee80211_ht_operation); 2552 } 2553 2554 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2555 const struct cfg80211_chan_def *chandef) 2556 { 2557 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2558 *pos++ = 3; /* IE length */ 2559 /* New channel width */ 2560 switch (chandef->width) { 2561 case NL80211_CHAN_WIDTH_80: 2562 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2563 break; 2564 case NL80211_CHAN_WIDTH_160: 2565 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2566 break; 2567 case NL80211_CHAN_WIDTH_80P80: 2568 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2569 break; 2570 default: 2571 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2572 } 2573 2574 /* new center frequency segment 0 */ 2575 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2576 /* new center frequency segment 1 */ 2577 if (chandef->center_freq2) 2578 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2579 else 2580 *pos++ = 0; 2581 } 2582 2583 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2584 const struct cfg80211_chan_def *chandef) 2585 { 2586 struct ieee80211_vht_operation *vht_oper; 2587 2588 *pos++ = WLAN_EID_VHT_OPERATION; 2589 *pos++ = sizeof(struct ieee80211_vht_operation); 2590 vht_oper = (struct ieee80211_vht_operation *)pos; 2591 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2592 chandef->center_freq1); 2593 if (chandef->center_freq2) 2594 vht_oper->center_freq_seg1_idx = 2595 ieee80211_frequency_to_channel(chandef->center_freq2); 2596 else 2597 vht_oper->center_freq_seg1_idx = 0x00; 2598 2599 switch (chandef->width) { 2600 case NL80211_CHAN_WIDTH_160: 2601 /* 2602 * Convert 160 MHz channel width to new style as interop 2603 * workaround. 2604 */ 2605 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2606 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2607 if (chandef->chan->center_freq < chandef->center_freq1) 2608 vht_oper->center_freq_seg0_idx -= 8; 2609 else 2610 vht_oper->center_freq_seg0_idx += 8; 2611 break; 2612 case NL80211_CHAN_WIDTH_80P80: 2613 /* 2614 * Convert 80+80 MHz channel width to new style as interop 2615 * workaround. 2616 */ 2617 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2618 break; 2619 case NL80211_CHAN_WIDTH_80: 2620 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2621 break; 2622 default: 2623 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2624 break; 2625 } 2626 2627 /* don't require special VHT peer rates */ 2628 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2629 2630 return pos + sizeof(struct ieee80211_vht_operation); 2631 } 2632 2633 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2634 struct cfg80211_chan_def *chandef) 2635 { 2636 enum nl80211_channel_type channel_type; 2637 2638 if (!ht_oper) 2639 return false; 2640 2641 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2642 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2643 channel_type = NL80211_CHAN_HT20; 2644 break; 2645 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2646 channel_type = NL80211_CHAN_HT40PLUS; 2647 break; 2648 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2649 channel_type = NL80211_CHAN_HT40MINUS; 2650 break; 2651 default: 2652 channel_type = NL80211_CHAN_NO_HT; 2653 return false; 2654 } 2655 2656 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2657 return true; 2658 } 2659 2660 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, 2661 struct cfg80211_chan_def *chandef) 2662 { 2663 struct cfg80211_chan_def new = *chandef; 2664 int cf1, cf2; 2665 2666 if (!oper) 2667 return false; 2668 2669 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx, 2670 chandef->chan->band); 2671 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2672 chandef->chan->band); 2673 2674 switch (oper->chan_width) { 2675 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2676 break; 2677 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2678 new.width = NL80211_CHAN_WIDTH_80; 2679 new.center_freq1 = cf1; 2680 /* If needed, adjust based on the newer interop workaround. */ 2681 if (oper->center_freq_seg1_idx) { 2682 unsigned int diff; 2683 2684 diff = abs(oper->center_freq_seg1_idx - 2685 oper->center_freq_seg0_idx); 2686 if (diff == 8) { 2687 new.width = NL80211_CHAN_WIDTH_160; 2688 new.center_freq1 = cf2; 2689 } else if (diff > 8) { 2690 new.width = NL80211_CHAN_WIDTH_80P80; 2691 new.center_freq2 = cf2; 2692 } 2693 } 2694 break; 2695 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2696 new.width = NL80211_CHAN_WIDTH_160; 2697 new.center_freq1 = cf1; 2698 break; 2699 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2700 new.width = NL80211_CHAN_WIDTH_80P80; 2701 new.center_freq1 = cf1; 2702 new.center_freq2 = cf2; 2703 break; 2704 default: 2705 return false; 2706 } 2707 2708 if (!cfg80211_chandef_valid(&new)) 2709 return false; 2710 2711 *chandef = new; 2712 return true; 2713 } 2714 2715 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2716 const struct ieee80211_supported_band *sband, 2717 const u8 *srates, int srates_len, u32 *rates) 2718 { 2719 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2720 int shift = ieee80211_chandef_get_shift(chandef); 2721 struct ieee80211_rate *br; 2722 int brate, rate, i, j, count = 0; 2723 2724 *rates = 0; 2725 2726 for (i = 0; i < srates_len; i++) { 2727 rate = srates[i] & 0x7f; 2728 2729 for (j = 0; j < sband->n_bitrates; j++) { 2730 br = &sband->bitrates[j]; 2731 if ((rate_flags & br->flags) != rate_flags) 2732 continue; 2733 2734 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2735 if (brate == rate) { 2736 *rates |= BIT(j); 2737 count++; 2738 break; 2739 } 2740 } 2741 } 2742 return count; 2743 } 2744 2745 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2746 struct sk_buff *skb, bool need_basic, 2747 enum nl80211_band band) 2748 { 2749 struct ieee80211_local *local = sdata->local; 2750 struct ieee80211_supported_band *sband; 2751 int rate, shift; 2752 u8 i, rates, *pos; 2753 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2754 u32 rate_flags; 2755 2756 shift = ieee80211_vif_get_shift(&sdata->vif); 2757 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2758 sband = local->hw.wiphy->bands[band]; 2759 rates = 0; 2760 for (i = 0; i < sband->n_bitrates; i++) { 2761 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2762 continue; 2763 rates++; 2764 } 2765 if (rates > 8) 2766 rates = 8; 2767 2768 if (skb_tailroom(skb) < rates + 2) 2769 return -ENOMEM; 2770 2771 pos = skb_put(skb, rates + 2); 2772 *pos++ = WLAN_EID_SUPP_RATES; 2773 *pos++ = rates; 2774 for (i = 0; i < rates; i++) { 2775 u8 basic = 0; 2776 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2777 continue; 2778 2779 if (need_basic && basic_rates & BIT(i)) 2780 basic = 0x80; 2781 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2782 5 * (1 << shift)); 2783 *pos++ = basic | (u8) rate; 2784 } 2785 2786 return 0; 2787 } 2788 2789 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2790 struct sk_buff *skb, bool need_basic, 2791 enum nl80211_band band) 2792 { 2793 struct ieee80211_local *local = sdata->local; 2794 struct ieee80211_supported_band *sband; 2795 int rate, shift; 2796 u8 i, exrates, *pos; 2797 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2798 u32 rate_flags; 2799 2800 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2801 shift = ieee80211_vif_get_shift(&sdata->vif); 2802 2803 sband = local->hw.wiphy->bands[band]; 2804 exrates = 0; 2805 for (i = 0; i < sband->n_bitrates; i++) { 2806 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2807 continue; 2808 exrates++; 2809 } 2810 2811 if (exrates > 8) 2812 exrates -= 8; 2813 else 2814 exrates = 0; 2815 2816 if (skb_tailroom(skb) < exrates + 2) 2817 return -ENOMEM; 2818 2819 if (exrates) { 2820 pos = skb_put(skb, exrates + 2); 2821 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2822 *pos++ = exrates; 2823 for (i = 8; i < sband->n_bitrates; i++) { 2824 u8 basic = 0; 2825 if ((rate_flags & sband->bitrates[i].flags) 2826 != rate_flags) 2827 continue; 2828 if (need_basic && basic_rates & BIT(i)) 2829 basic = 0x80; 2830 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2831 5 * (1 << shift)); 2832 *pos++ = basic | (u8) rate; 2833 } 2834 } 2835 return 0; 2836 } 2837 2838 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2839 { 2840 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2842 2843 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2844 /* non-managed type inferfaces */ 2845 return 0; 2846 } 2847 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2848 } 2849 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2850 2851 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2852 { 2853 if (!mcs) 2854 return 1; 2855 2856 /* TODO: consider rx_highest */ 2857 2858 if (mcs->rx_mask[3]) 2859 return 4; 2860 if (mcs->rx_mask[2]) 2861 return 3; 2862 if (mcs->rx_mask[1]) 2863 return 2; 2864 return 1; 2865 } 2866 2867 /** 2868 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2869 * @local: mac80211 hw info struct 2870 * @status: RX status 2871 * @mpdu_len: total MPDU length (including FCS) 2872 * @mpdu_offset: offset into MPDU to calculate timestamp at 2873 * 2874 * This function calculates the RX timestamp at the given MPDU offset, taking 2875 * into account what the RX timestamp was. An offset of 0 will just normalize 2876 * the timestamp to TSF at beginning of MPDU reception. 2877 */ 2878 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2879 struct ieee80211_rx_status *status, 2880 unsigned int mpdu_len, 2881 unsigned int mpdu_offset) 2882 { 2883 u64 ts = status->mactime; 2884 struct rate_info ri; 2885 u16 rate; 2886 2887 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2888 return 0; 2889 2890 memset(&ri, 0, sizeof(ri)); 2891 2892 ri.bw = status->bw; 2893 2894 /* Fill cfg80211 rate info */ 2895 switch (status->encoding) { 2896 case RX_ENC_HT: 2897 ri.mcs = status->rate_idx; 2898 ri.flags |= RATE_INFO_FLAGS_MCS; 2899 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2900 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2901 break; 2902 case RX_ENC_VHT: 2903 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2904 ri.mcs = status->rate_idx; 2905 ri.nss = status->nss; 2906 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2907 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2908 break; 2909 default: 2910 WARN_ON(1); 2911 /* fall through */ 2912 case RX_ENC_LEGACY: { 2913 struct ieee80211_supported_band *sband; 2914 int shift = 0; 2915 int bitrate; 2916 2917 switch (status->bw) { 2918 case RATE_INFO_BW_10: 2919 shift = 1; 2920 break; 2921 case RATE_INFO_BW_5: 2922 shift = 2; 2923 break; 2924 } 2925 2926 sband = local->hw.wiphy->bands[status->band]; 2927 bitrate = sband->bitrates[status->rate_idx].bitrate; 2928 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2929 2930 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 2931 /* TODO: handle HT/VHT preambles */ 2932 if (status->band == NL80211_BAND_5GHZ) { 2933 ts += 20 << shift; 2934 mpdu_offset += 2; 2935 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 2936 ts += 96; 2937 } else { 2938 ts += 192; 2939 } 2940 } 2941 break; 2942 } 2943 } 2944 2945 rate = cfg80211_calculate_bitrate(&ri); 2946 if (WARN_ONCE(!rate, 2947 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 2948 (unsigned long long)status->flag, status->rate_idx, 2949 status->nss)) 2950 return 0; 2951 2952 /* rewind from end of MPDU */ 2953 if (status->flag & RX_FLAG_MACTIME_END) 2954 ts -= mpdu_len * 8 * 10 / rate; 2955 2956 ts += mpdu_offset * 8 * 10 / rate; 2957 2958 return ts; 2959 } 2960 2961 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2962 { 2963 struct ieee80211_sub_if_data *sdata; 2964 struct cfg80211_chan_def chandef; 2965 2966 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 2967 ASSERT_RTNL(); 2968 2969 mutex_lock(&local->mtx); 2970 list_for_each_entry(sdata, &local->interfaces, list) { 2971 /* it might be waiting for the local->mtx, but then 2972 * by the time it gets it, sdata->wdev.cac_started 2973 * will no longer be true 2974 */ 2975 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2976 2977 if (sdata->wdev.cac_started) { 2978 chandef = sdata->vif.bss_conf.chandef; 2979 ieee80211_vif_release_channel(sdata); 2980 cfg80211_cac_event(sdata->dev, 2981 &chandef, 2982 NL80211_RADAR_CAC_ABORTED, 2983 GFP_KERNEL); 2984 } 2985 } 2986 mutex_unlock(&local->mtx); 2987 } 2988 2989 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2990 { 2991 struct ieee80211_local *local = 2992 container_of(work, struct ieee80211_local, radar_detected_work); 2993 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2994 struct ieee80211_chanctx *ctx; 2995 int num_chanctx = 0; 2996 2997 mutex_lock(&local->chanctx_mtx); 2998 list_for_each_entry(ctx, &local->chanctx_list, list) { 2999 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3000 continue; 3001 3002 num_chanctx++; 3003 chandef = ctx->conf.def; 3004 } 3005 mutex_unlock(&local->chanctx_mtx); 3006 3007 rtnl_lock(); 3008 ieee80211_dfs_cac_cancel(local); 3009 rtnl_unlock(); 3010 3011 if (num_chanctx > 1) 3012 /* XXX: multi-channel is not supported yet */ 3013 WARN_ON(1); 3014 else 3015 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3016 } 3017 3018 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3019 { 3020 struct ieee80211_local *local = hw_to_local(hw); 3021 3022 trace_api_radar_detected(local); 3023 3024 schedule_work(&local->radar_detected_work); 3025 } 3026 EXPORT_SYMBOL(ieee80211_radar_detected); 3027 3028 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3029 { 3030 u32 ret; 3031 int tmp; 3032 3033 switch (c->width) { 3034 case NL80211_CHAN_WIDTH_20: 3035 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3036 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3037 break; 3038 case NL80211_CHAN_WIDTH_40: 3039 c->width = NL80211_CHAN_WIDTH_20; 3040 c->center_freq1 = c->chan->center_freq; 3041 ret = IEEE80211_STA_DISABLE_40MHZ | 3042 IEEE80211_STA_DISABLE_VHT; 3043 break; 3044 case NL80211_CHAN_WIDTH_80: 3045 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3046 /* n_P40 */ 3047 tmp /= 2; 3048 /* freq_P40 */ 3049 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3050 c->width = NL80211_CHAN_WIDTH_40; 3051 ret = IEEE80211_STA_DISABLE_VHT; 3052 break; 3053 case NL80211_CHAN_WIDTH_80P80: 3054 c->center_freq2 = 0; 3055 c->width = NL80211_CHAN_WIDTH_80; 3056 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3057 IEEE80211_STA_DISABLE_160MHZ; 3058 break; 3059 case NL80211_CHAN_WIDTH_160: 3060 /* n_P20 */ 3061 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3062 /* n_P80 */ 3063 tmp /= 4; 3064 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3065 c->width = NL80211_CHAN_WIDTH_80; 3066 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3067 IEEE80211_STA_DISABLE_160MHZ; 3068 break; 3069 default: 3070 case NL80211_CHAN_WIDTH_20_NOHT: 3071 WARN_ON_ONCE(1); 3072 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3073 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3074 break; 3075 case NL80211_CHAN_WIDTH_5: 3076 case NL80211_CHAN_WIDTH_10: 3077 WARN_ON_ONCE(1); 3078 /* keep c->width */ 3079 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3080 break; 3081 } 3082 3083 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3084 3085 return ret; 3086 } 3087 3088 /* 3089 * Returns true if smps_mode_new is strictly more restrictive than 3090 * smps_mode_old. 3091 */ 3092 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3093 enum ieee80211_smps_mode smps_mode_new) 3094 { 3095 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3096 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3097 return false; 3098 3099 switch (smps_mode_old) { 3100 case IEEE80211_SMPS_STATIC: 3101 return false; 3102 case IEEE80211_SMPS_DYNAMIC: 3103 return smps_mode_new == IEEE80211_SMPS_STATIC; 3104 case IEEE80211_SMPS_OFF: 3105 return smps_mode_new != IEEE80211_SMPS_OFF; 3106 default: 3107 WARN_ON(1); 3108 } 3109 3110 return false; 3111 } 3112 3113 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3114 struct cfg80211_csa_settings *csa_settings) 3115 { 3116 struct sk_buff *skb; 3117 struct ieee80211_mgmt *mgmt; 3118 struct ieee80211_local *local = sdata->local; 3119 int freq; 3120 int hdr_len = offsetofend(struct ieee80211_mgmt, 3121 u.action.u.chan_switch); 3122 u8 *pos; 3123 3124 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3125 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3126 return -EOPNOTSUPP; 3127 3128 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3129 5 + /* channel switch announcement element */ 3130 3 + /* secondary channel offset element */ 3131 5 + /* wide bandwidth channel switch announcement */ 3132 8); /* mesh channel switch parameters element */ 3133 if (!skb) 3134 return -ENOMEM; 3135 3136 skb_reserve(skb, local->tx_headroom); 3137 mgmt = skb_put_zero(skb, hdr_len); 3138 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3139 IEEE80211_STYPE_ACTION); 3140 3141 eth_broadcast_addr(mgmt->da); 3142 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3143 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3144 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3145 } else { 3146 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3147 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3148 } 3149 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3150 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3151 pos = skb_put(skb, 5); 3152 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3153 *pos++ = 3; /* IE length */ 3154 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3155 freq = csa_settings->chandef.chan->center_freq; 3156 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3157 *pos++ = csa_settings->count; /* count */ 3158 3159 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3160 enum nl80211_channel_type ch_type; 3161 3162 skb_put(skb, 3); 3163 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3164 *pos++ = 1; /* IE length */ 3165 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3166 if (ch_type == NL80211_CHAN_HT40PLUS) 3167 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3168 else 3169 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3170 } 3171 3172 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3173 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3174 3175 skb_put(skb, 8); 3176 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3177 *pos++ = 6; /* IE length */ 3178 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3179 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3180 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3181 *pos++ |= csa_settings->block_tx ? 3182 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3183 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3184 pos += 2; 3185 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3186 pos += 2; 3187 } 3188 3189 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3190 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3191 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3192 skb_put(skb, 5); 3193 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3194 } 3195 3196 ieee80211_tx_skb(sdata, skb); 3197 return 0; 3198 } 3199 3200 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3201 { 3202 return !(cs == NULL || cs->cipher == 0 || 3203 cs->hdr_len < cs->pn_len + cs->pn_off || 3204 cs->hdr_len <= cs->key_idx_off || 3205 cs->key_idx_shift > 7 || 3206 cs->key_idx_mask == 0); 3207 } 3208 3209 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3210 { 3211 int i; 3212 3213 /* Ensure we have enough iftype bitmap space for all iftype values */ 3214 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3215 3216 for (i = 0; i < n; i++) 3217 if (!ieee80211_cs_valid(&cs[i])) 3218 return false; 3219 3220 return true; 3221 } 3222 3223 const struct ieee80211_cipher_scheme * 3224 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3225 enum nl80211_iftype iftype) 3226 { 3227 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3228 int n = local->hw.n_cipher_schemes; 3229 int i; 3230 const struct ieee80211_cipher_scheme *cs = NULL; 3231 3232 for (i = 0; i < n; i++) { 3233 if (l[i].cipher == cipher) { 3234 cs = &l[i]; 3235 break; 3236 } 3237 } 3238 3239 if (!cs || !(cs->iftype & BIT(iftype))) 3240 return NULL; 3241 3242 return cs; 3243 } 3244 3245 int ieee80211_cs_headroom(struct ieee80211_local *local, 3246 struct cfg80211_crypto_settings *crypto, 3247 enum nl80211_iftype iftype) 3248 { 3249 const struct ieee80211_cipher_scheme *cs; 3250 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3251 int i; 3252 3253 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3254 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3255 iftype); 3256 3257 if (cs && headroom < cs->hdr_len) 3258 headroom = cs->hdr_len; 3259 } 3260 3261 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3262 if (cs && headroom < cs->hdr_len) 3263 headroom = cs->hdr_len; 3264 3265 return headroom; 3266 } 3267 3268 static bool 3269 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3270 { 3271 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3272 int skip; 3273 3274 if (end > 0) 3275 return false; 3276 3277 /* One shot NOA */ 3278 if (data->count[i] == 1) 3279 return false; 3280 3281 if (data->desc[i].interval == 0) 3282 return false; 3283 3284 /* End time is in the past, check for repetitions */ 3285 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3286 if (data->count[i] < 255) { 3287 if (data->count[i] <= skip) { 3288 data->count[i] = 0; 3289 return false; 3290 } 3291 3292 data->count[i] -= skip; 3293 } 3294 3295 data->desc[i].start += skip * data->desc[i].interval; 3296 3297 return true; 3298 } 3299 3300 static bool 3301 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3302 s32 *offset) 3303 { 3304 bool ret = false; 3305 int i; 3306 3307 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3308 s32 cur; 3309 3310 if (!data->count[i]) 3311 continue; 3312 3313 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3314 ret = true; 3315 3316 cur = data->desc[i].start - tsf; 3317 if (cur > *offset) 3318 continue; 3319 3320 cur = data->desc[i].start + data->desc[i].duration - tsf; 3321 if (cur > *offset) 3322 *offset = cur; 3323 } 3324 3325 return ret; 3326 } 3327 3328 static u32 3329 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3330 { 3331 s32 offset = 0; 3332 int tries = 0; 3333 /* 3334 * arbitrary limit, used to avoid infinite loops when combined NoA 3335 * descriptors cover the full time period. 3336 */ 3337 int max_tries = 5; 3338 3339 ieee80211_extend_absent_time(data, tsf, &offset); 3340 do { 3341 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3342 break; 3343 3344 tries++; 3345 } while (tries < max_tries); 3346 3347 return offset; 3348 } 3349 3350 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3351 { 3352 u32 next_offset = BIT(31) - 1; 3353 int i; 3354 3355 data->absent = 0; 3356 data->has_next_tsf = false; 3357 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3358 s32 start; 3359 3360 if (!data->count[i]) 3361 continue; 3362 3363 ieee80211_extend_noa_desc(data, tsf, i); 3364 start = data->desc[i].start - tsf; 3365 if (start <= 0) 3366 data->absent |= BIT(i); 3367 3368 if (next_offset > start) 3369 next_offset = start; 3370 3371 data->has_next_tsf = true; 3372 } 3373 3374 if (data->absent) 3375 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3376 3377 data->next_tsf = tsf + next_offset; 3378 } 3379 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3380 3381 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3382 struct ieee80211_noa_data *data, u32 tsf) 3383 { 3384 int ret = 0; 3385 int i; 3386 3387 memset(data, 0, sizeof(*data)); 3388 3389 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3390 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3391 3392 if (!desc->count || !desc->duration) 3393 continue; 3394 3395 data->count[i] = desc->count; 3396 data->desc[i].start = le32_to_cpu(desc->start_time); 3397 data->desc[i].duration = le32_to_cpu(desc->duration); 3398 data->desc[i].interval = le32_to_cpu(desc->interval); 3399 3400 if (data->count[i] > 1 && 3401 data->desc[i].interval < data->desc[i].duration) 3402 continue; 3403 3404 ieee80211_extend_noa_desc(data, tsf, i); 3405 ret++; 3406 } 3407 3408 if (ret) 3409 ieee80211_update_p2p_noa(data, tsf); 3410 3411 return ret; 3412 } 3413 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3414 3415 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3416 struct ieee80211_sub_if_data *sdata) 3417 { 3418 u64 tsf = drv_get_tsf(local, sdata); 3419 u64 dtim_count = 0; 3420 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3421 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3422 struct ps_data *ps; 3423 u8 bcns_from_dtim; 3424 3425 if (tsf == -1ULL || !beacon_int || !dtim_period) 3426 return; 3427 3428 if (sdata->vif.type == NL80211_IFTYPE_AP || 3429 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3430 if (!sdata->bss) 3431 return; 3432 3433 ps = &sdata->bss->ps; 3434 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3435 ps = &sdata->u.mesh.ps; 3436 } else { 3437 return; 3438 } 3439 3440 /* 3441 * actually finds last dtim_count, mac80211 will update in 3442 * __beacon_add_tim(). 3443 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3444 */ 3445 do_div(tsf, beacon_int); 3446 bcns_from_dtim = do_div(tsf, dtim_period); 3447 /* just had a DTIM */ 3448 if (!bcns_from_dtim) 3449 dtim_count = 0; 3450 else 3451 dtim_count = dtim_period - bcns_from_dtim; 3452 3453 ps->dtim_count = dtim_count; 3454 } 3455 3456 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3457 struct ieee80211_chanctx *ctx) 3458 { 3459 struct ieee80211_sub_if_data *sdata; 3460 u8 radar_detect = 0; 3461 3462 lockdep_assert_held(&local->chanctx_mtx); 3463 3464 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3465 return 0; 3466 3467 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3468 if (sdata->reserved_radar_required) 3469 radar_detect |= BIT(sdata->reserved_chandef.width); 3470 3471 /* 3472 * An in-place reservation context should not have any assigned vifs 3473 * until it replaces the other context. 3474 */ 3475 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3476 !list_empty(&ctx->assigned_vifs)); 3477 3478 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3479 if (sdata->radar_required) 3480 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3481 3482 return radar_detect; 3483 } 3484 3485 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3486 const struct cfg80211_chan_def *chandef, 3487 enum ieee80211_chanctx_mode chanmode, 3488 u8 radar_detect) 3489 { 3490 struct ieee80211_local *local = sdata->local; 3491 struct ieee80211_sub_if_data *sdata_iter; 3492 enum nl80211_iftype iftype = sdata->wdev.iftype; 3493 struct ieee80211_chanctx *ctx; 3494 int total = 1; 3495 struct iface_combination_params params = { 3496 .radar_detect = radar_detect, 3497 }; 3498 3499 lockdep_assert_held(&local->chanctx_mtx); 3500 3501 if (WARN_ON(hweight32(radar_detect) > 1)) 3502 return -EINVAL; 3503 3504 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3505 !chandef->chan)) 3506 return -EINVAL; 3507 3508 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3509 return -EINVAL; 3510 3511 if (sdata->vif.type == NL80211_IFTYPE_AP || 3512 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3513 /* 3514 * always passing this is harmless, since it'll be the 3515 * same value that cfg80211 finds if it finds the same 3516 * interface ... and that's always allowed 3517 */ 3518 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3519 } 3520 3521 /* Always allow software iftypes */ 3522 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3523 if (radar_detect) 3524 return -EINVAL; 3525 return 0; 3526 } 3527 3528 if (chandef) 3529 params.num_different_channels = 1; 3530 3531 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3532 params.iftype_num[iftype] = 1; 3533 3534 list_for_each_entry(ctx, &local->chanctx_list, list) { 3535 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3536 continue; 3537 params.radar_detect |= 3538 ieee80211_chanctx_radar_detect(local, ctx); 3539 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3540 params.num_different_channels++; 3541 continue; 3542 } 3543 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3544 cfg80211_chandef_compatible(chandef, 3545 &ctx->conf.def)) 3546 continue; 3547 params.num_different_channels++; 3548 } 3549 3550 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3551 struct wireless_dev *wdev_iter; 3552 3553 wdev_iter = &sdata_iter->wdev; 3554 3555 if (sdata_iter == sdata || 3556 !ieee80211_sdata_running(sdata_iter) || 3557 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3558 continue; 3559 3560 params.iftype_num[wdev_iter->iftype]++; 3561 total++; 3562 } 3563 3564 if (total == 1 && !params.radar_detect) 3565 return 0; 3566 3567 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3568 } 3569 3570 static void 3571 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3572 void *data) 3573 { 3574 u32 *max_num_different_channels = data; 3575 3576 *max_num_different_channels = max(*max_num_different_channels, 3577 c->num_different_channels); 3578 } 3579 3580 int ieee80211_max_num_channels(struct ieee80211_local *local) 3581 { 3582 struct ieee80211_sub_if_data *sdata; 3583 struct ieee80211_chanctx *ctx; 3584 u32 max_num_different_channels = 1; 3585 int err; 3586 struct iface_combination_params params = {0}; 3587 3588 lockdep_assert_held(&local->chanctx_mtx); 3589 3590 list_for_each_entry(ctx, &local->chanctx_list, list) { 3591 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3592 continue; 3593 3594 params.num_different_channels++; 3595 3596 params.radar_detect |= 3597 ieee80211_chanctx_radar_detect(local, ctx); 3598 } 3599 3600 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3601 params.iftype_num[sdata->wdev.iftype]++; 3602 3603 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3604 ieee80211_iter_max_chans, 3605 &max_num_different_channels); 3606 if (err < 0) 3607 return err; 3608 3609 return max_num_different_channels; 3610 } 3611 3612 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3613 { 3614 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3615 *buf++ = 7; /* len */ 3616 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3617 *buf++ = 0x50; 3618 *buf++ = 0xf2; 3619 *buf++ = 2; /* WME */ 3620 *buf++ = 0; /* WME info */ 3621 *buf++ = 1; /* WME ver */ 3622 *buf++ = qosinfo; /* U-APSD no in use */ 3623 3624 return buf; 3625 } 3626 3627 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3628 unsigned long *frame_cnt, 3629 unsigned long *byte_cnt) 3630 { 3631 struct txq_info *txqi = to_txq_info(txq); 3632 u32 frag_cnt = 0, frag_bytes = 0; 3633 struct sk_buff *skb; 3634 3635 skb_queue_walk(&txqi->frags, skb) { 3636 frag_cnt++; 3637 frag_bytes += skb->len; 3638 } 3639 3640 if (frame_cnt) 3641 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3642 3643 if (byte_cnt) 3644 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3645 } 3646 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3647 3648 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3649 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3650 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3651 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3652 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3653 }; 3654