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 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->wmm_rule) { 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 = !qparam->txop ? wmm_ac->cot / 32 : 1170 min_t(u16, qparam->txop, wmm_ac->cot / 32); 1171 rcu_read_unlock(); 1172 } 1173 1174 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata, 1175 bool bss_notify, bool enable_qos) 1176 { 1177 struct ieee80211_local *local = sdata->local; 1178 struct ieee80211_tx_queue_params qparam; 1179 struct ieee80211_chanctx_conf *chanctx_conf; 1180 int ac; 1181 bool use_11b; 1182 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1183 int aCWmin, aCWmax; 1184 1185 if (!local->ops->conf_tx) 1186 return; 1187 1188 if (local->hw.queues < IEEE80211_NUM_ACS) 1189 return; 1190 1191 memset(&qparam, 0, sizeof(qparam)); 1192 1193 rcu_read_lock(); 1194 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf); 1195 use_11b = (chanctx_conf && 1196 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1197 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE); 1198 rcu_read_unlock(); 1199 1200 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1201 1202 /* Set defaults according to 802.11-2007 Table 7-37 */ 1203 aCWmax = 1023; 1204 if (use_11b) 1205 aCWmin = 31; 1206 else 1207 aCWmin = 15; 1208 1209 /* Confiure old 802.11b/g medium access rules. */ 1210 qparam.cw_max = aCWmax; 1211 qparam.cw_min = aCWmin; 1212 qparam.txop = 0; 1213 qparam.aifs = 2; 1214 1215 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1216 /* Update if QoS is enabled. */ 1217 if (enable_qos) { 1218 switch (ac) { 1219 case IEEE80211_AC_BK: 1220 qparam.cw_max = aCWmax; 1221 qparam.cw_min = aCWmin; 1222 qparam.txop = 0; 1223 if (is_ocb) 1224 qparam.aifs = 9; 1225 else 1226 qparam.aifs = 7; 1227 break; 1228 /* never happens but let's not leave undefined */ 1229 default: 1230 case IEEE80211_AC_BE: 1231 qparam.cw_max = aCWmax; 1232 qparam.cw_min = aCWmin; 1233 qparam.txop = 0; 1234 if (is_ocb) 1235 qparam.aifs = 6; 1236 else 1237 qparam.aifs = 3; 1238 break; 1239 case IEEE80211_AC_VI: 1240 qparam.cw_max = aCWmin; 1241 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1242 if (is_ocb) 1243 qparam.txop = 0; 1244 else if (use_11b) 1245 qparam.txop = 6016/32; 1246 else 1247 qparam.txop = 3008/32; 1248 1249 if (is_ocb) 1250 qparam.aifs = 3; 1251 else 1252 qparam.aifs = 2; 1253 break; 1254 case IEEE80211_AC_VO: 1255 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1256 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1257 if (is_ocb) 1258 qparam.txop = 0; 1259 else if (use_11b) 1260 qparam.txop = 3264/32; 1261 else 1262 qparam.txop = 1504/32; 1263 qparam.aifs = 2; 1264 break; 1265 } 1266 } 1267 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1268 1269 qparam.uapsd = false; 1270 1271 sdata->tx_conf[ac] = qparam; 1272 drv_conf_tx(local, sdata, ac, &qparam); 1273 } 1274 1275 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1276 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1277 sdata->vif.type != NL80211_IFTYPE_NAN) { 1278 sdata->vif.bss_conf.qos = enable_qos; 1279 if (bss_notify) 1280 ieee80211_bss_info_change_notify(sdata, 1281 BSS_CHANGED_QOS); 1282 } 1283 } 1284 1285 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1286 u16 transaction, u16 auth_alg, u16 status, 1287 const u8 *extra, size_t extra_len, const u8 *da, 1288 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1289 u32 tx_flags) 1290 { 1291 struct ieee80211_local *local = sdata->local; 1292 struct sk_buff *skb; 1293 struct ieee80211_mgmt *mgmt; 1294 int err; 1295 1296 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1297 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1298 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN); 1299 if (!skb) 1300 return; 1301 1302 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1303 1304 mgmt = skb_put_zero(skb, 24 + 6); 1305 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1306 IEEE80211_STYPE_AUTH); 1307 memcpy(mgmt->da, da, ETH_ALEN); 1308 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1309 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1310 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1311 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1312 mgmt->u.auth.status_code = cpu_to_le16(status); 1313 if (extra) 1314 skb_put_data(skb, extra, extra_len); 1315 1316 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1317 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1318 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1319 WARN_ON(err); 1320 } 1321 1322 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1323 tx_flags; 1324 ieee80211_tx_skb(sdata, skb); 1325 } 1326 1327 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1328 const u8 *bssid, u16 stype, u16 reason, 1329 bool send_frame, u8 *frame_buf) 1330 { 1331 struct ieee80211_local *local = sdata->local; 1332 struct sk_buff *skb; 1333 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1334 1335 /* build frame */ 1336 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1337 mgmt->duration = 0; /* initialize only */ 1338 mgmt->seq_ctrl = 0; /* initialize only */ 1339 memcpy(mgmt->da, bssid, ETH_ALEN); 1340 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1341 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1342 /* u.deauth.reason_code == u.disassoc.reason_code */ 1343 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1344 1345 if (send_frame) { 1346 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1347 IEEE80211_DEAUTH_FRAME_LEN); 1348 if (!skb) 1349 return; 1350 1351 skb_reserve(skb, local->hw.extra_tx_headroom); 1352 1353 /* copy in frame */ 1354 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1355 1356 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1357 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1358 IEEE80211_SKB_CB(skb)->flags |= 1359 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1360 1361 ieee80211_tx_skb(sdata, skb); 1362 } 1363 } 1364 1365 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local, 1366 u8 *buffer, size_t buffer_len, 1367 const u8 *ie, size_t ie_len, 1368 enum nl80211_band band, 1369 u32 rate_mask, 1370 struct cfg80211_chan_def *chandef, 1371 size_t *offset, u32 flags) 1372 { 1373 struct ieee80211_supported_band *sband; 1374 const struct ieee80211_sta_he_cap *he_cap; 1375 u8 *pos = buffer, *end = buffer + buffer_len; 1376 size_t noffset; 1377 int supp_rates_len, i; 1378 u8 rates[32]; 1379 int num_rates; 1380 int ext_rates_len; 1381 int shift; 1382 u32 rate_flags; 1383 bool have_80mhz = false; 1384 1385 *offset = 0; 1386 1387 sband = local->hw.wiphy->bands[band]; 1388 if (WARN_ON_ONCE(!sband)) 1389 return 0; 1390 1391 rate_flags = ieee80211_chandef_rate_flags(chandef); 1392 shift = ieee80211_chandef_get_shift(chandef); 1393 1394 num_rates = 0; 1395 for (i = 0; i < sband->n_bitrates; i++) { 1396 if ((BIT(i) & rate_mask) == 0) 1397 continue; /* skip rate */ 1398 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 1399 continue; 1400 1401 rates[num_rates++] = 1402 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate, 1403 (1 << shift) * 5); 1404 } 1405 1406 supp_rates_len = min_t(int, num_rates, 8); 1407 1408 if (end - pos < 2 + supp_rates_len) 1409 goto out_err; 1410 *pos++ = WLAN_EID_SUPP_RATES; 1411 *pos++ = supp_rates_len; 1412 memcpy(pos, rates, supp_rates_len); 1413 pos += supp_rates_len; 1414 1415 /* insert "request information" if in custom IEs */ 1416 if (ie && ie_len) { 1417 static const u8 before_extrates[] = { 1418 WLAN_EID_SSID, 1419 WLAN_EID_SUPP_RATES, 1420 WLAN_EID_REQUEST, 1421 }; 1422 noffset = ieee80211_ie_split(ie, ie_len, 1423 before_extrates, 1424 ARRAY_SIZE(before_extrates), 1425 *offset); 1426 if (end - pos < noffset - *offset) 1427 goto out_err; 1428 memcpy(pos, ie + *offset, noffset - *offset); 1429 pos += noffset - *offset; 1430 *offset = noffset; 1431 } 1432 1433 ext_rates_len = num_rates - supp_rates_len; 1434 if (ext_rates_len > 0) { 1435 if (end - pos < 2 + ext_rates_len) 1436 goto out_err; 1437 *pos++ = WLAN_EID_EXT_SUPP_RATES; 1438 *pos++ = ext_rates_len; 1439 memcpy(pos, rates + supp_rates_len, ext_rates_len); 1440 pos += ext_rates_len; 1441 } 1442 1443 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1444 if (end - pos < 3) 1445 goto out_err; 1446 *pos++ = WLAN_EID_DS_PARAMS; 1447 *pos++ = 1; 1448 *pos++ = ieee80211_frequency_to_channel( 1449 chandef->chan->center_freq); 1450 } 1451 1452 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1453 goto done; 1454 1455 /* insert custom IEs that go before HT */ 1456 if (ie && ie_len) { 1457 static const u8 before_ht[] = { 1458 /* 1459 * no need to list the ones split off already 1460 * (or generated here) 1461 */ 1462 WLAN_EID_DS_PARAMS, 1463 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1464 }; 1465 noffset = ieee80211_ie_split(ie, ie_len, 1466 before_ht, ARRAY_SIZE(before_ht), 1467 *offset); 1468 if (end - pos < noffset - *offset) 1469 goto out_err; 1470 memcpy(pos, ie + *offset, noffset - *offset); 1471 pos += noffset - *offset; 1472 *offset = noffset; 1473 } 1474 1475 if (sband->ht_cap.ht_supported) { 1476 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap)) 1477 goto out_err; 1478 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1479 sband->ht_cap.cap); 1480 } 1481 1482 /* insert custom IEs that go before VHT */ 1483 if (ie && ie_len) { 1484 static const u8 before_vht[] = { 1485 /* 1486 * no need to list the ones split off already 1487 * (or generated here) 1488 */ 1489 WLAN_EID_BSS_COEX_2040, 1490 WLAN_EID_EXT_CAPABILITY, 1491 WLAN_EID_SSID_LIST, 1492 WLAN_EID_CHANNEL_USAGE, 1493 WLAN_EID_INTERWORKING, 1494 WLAN_EID_MESH_ID, 1495 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1496 }; 1497 noffset = ieee80211_ie_split(ie, ie_len, 1498 before_vht, ARRAY_SIZE(before_vht), 1499 *offset); 1500 if (end - pos < noffset - *offset) 1501 goto out_err; 1502 memcpy(pos, ie + *offset, noffset - *offset); 1503 pos += noffset - *offset; 1504 *offset = noffset; 1505 } 1506 1507 /* Check if any channel in this sband supports at least 80 MHz */ 1508 for (i = 0; i < sband->n_channels; i++) { 1509 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1510 IEEE80211_CHAN_NO_80MHZ)) 1511 continue; 1512 1513 have_80mhz = true; 1514 break; 1515 } 1516 1517 if (sband->vht_cap.vht_supported && have_80mhz) { 1518 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap)) 1519 goto out_err; 1520 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1521 sband->vht_cap.cap); 1522 } 1523 1524 /* insert custom IEs that go before HE */ 1525 if (ie && ie_len) { 1526 static const u8 before_he[] = { 1527 /* 1528 * no need to list the ones split off before VHT 1529 * or generated here 1530 */ 1531 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1532 WLAN_EID_AP_CSN, 1533 /* TODO: add 11ah/11aj/11ak elements */ 1534 }; 1535 noffset = ieee80211_ie_split(ie, ie_len, 1536 before_he, ARRAY_SIZE(before_he), 1537 *offset); 1538 if (end - pos < noffset - *offset) 1539 goto out_err; 1540 memcpy(pos, ie + *offset, noffset - *offset); 1541 pos += noffset - *offset; 1542 *offset = noffset; 1543 } 1544 1545 he_cap = ieee80211_get_he_sta_cap(sband); 1546 if (he_cap) { 1547 pos = ieee80211_ie_build_he_cap(pos, he_cap, end); 1548 if (!pos) 1549 goto out_err; 1550 } 1551 1552 /* 1553 * If adding more here, adjust code in main.c 1554 * that calculates local->scan_ies_len. 1555 */ 1556 1557 return pos - buffer; 1558 out_err: 1559 WARN_ONCE(1, "not enough space for preq IEs\n"); 1560 done: 1561 return pos - buffer; 1562 } 1563 1564 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer, 1565 size_t buffer_len, 1566 struct ieee80211_scan_ies *ie_desc, 1567 const u8 *ie, size_t ie_len, 1568 u8 bands_used, u32 *rate_masks, 1569 struct cfg80211_chan_def *chandef, 1570 u32 flags) 1571 { 1572 size_t pos = 0, old_pos = 0, custom_ie_offset = 0; 1573 int i; 1574 1575 memset(ie_desc, 0, sizeof(*ie_desc)); 1576 1577 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1578 if (bands_used & BIT(i)) { 1579 pos += ieee80211_build_preq_ies_band(local, 1580 buffer + pos, 1581 buffer_len - pos, 1582 ie, ie_len, i, 1583 rate_masks[i], 1584 chandef, 1585 &custom_ie_offset, 1586 flags); 1587 ie_desc->ies[i] = buffer + old_pos; 1588 ie_desc->len[i] = pos - old_pos; 1589 old_pos = pos; 1590 } 1591 } 1592 1593 /* add any remaining custom IEs */ 1594 if (ie && ie_len) { 1595 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset, 1596 "not enough space for preq custom IEs\n")) 1597 return pos; 1598 memcpy(buffer + pos, ie + custom_ie_offset, 1599 ie_len - custom_ie_offset); 1600 ie_desc->common_ies = buffer + pos; 1601 ie_desc->common_ie_len = ie_len - custom_ie_offset; 1602 pos += ie_len - custom_ie_offset; 1603 } 1604 1605 return pos; 1606 }; 1607 1608 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1609 const u8 *src, const u8 *dst, 1610 u32 ratemask, 1611 struct ieee80211_channel *chan, 1612 const u8 *ssid, size_t ssid_len, 1613 const u8 *ie, size_t ie_len, 1614 u32 flags) 1615 { 1616 struct ieee80211_local *local = sdata->local; 1617 struct cfg80211_chan_def chandef; 1618 struct sk_buff *skb; 1619 struct ieee80211_mgmt *mgmt; 1620 int ies_len; 1621 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1622 struct ieee80211_scan_ies dummy_ie_desc; 1623 1624 /* 1625 * Do not send DS Channel parameter for directed probe requests 1626 * in order to maximize the chance that we get a response. Some 1627 * badly-behaved APs don't respond when this parameter is included. 1628 */ 1629 chandef.width = sdata->vif.bss_conf.chandef.width; 1630 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1631 chandef.chan = NULL; 1632 else 1633 chandef.chan = chan; 1634 1635 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1636 100 + ie_len); 1637 if (!skb) 1638 return NULL; 1639 1640 rate_masks[chan->band] = ratemask; 1641 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb), 1642 skb_tailroom(skb), &dummy_ie_desc, 1643 ie, ie_len, BIT(chan->band), 1644 rate_masks, &chandef, flags); 1645 skb_put(skb, ies_len); 1646 1647 if (dst) { 1648 mgmt = (struct ieee80211_mgmt *) skb->data; 1649 memcpy(mgmt->da, dst, ETH_ALEN); 1650 memcpy(mgmt->bssid, dst, ETH_ALEN); 1651 } 1652 1653 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1654 1655 return skb; 1656 } 1657 1658 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1659 struct ieee802_11_elems *elems, 1660 enum nl80211_band band, u32 *basic_rates) 1661 { 1662 struct ieee80211_supported_band *sband; 1663 size_t num_rates; 1664 u32 supp_rates, rate_flags; 1665 int i, j, shift; 1666 1667 sband = sdata->local->hw.wiphy->bands[band]; 1668 if (WARN_ON(!sband)) 1669 return 1; 1670 1671 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 1672 shift = ieee80211_vif_get_shift(&sdata->vif); 1673 1674 num_rates = sband->n_bitrates; 1675 supp_rates = 0; 1676 for (i = 0; i < elems->supp_rates_len + 1677 elems->ext_supp_rates_len; i++) { 1678 u8 rate = 0; 1679 int own_rate; 1680 bool is_basic; 1681 if (i < elems->supp_rates_len) 1682 rate = elems->supp_rates[i]; 1683 else if (elems->ext_supp_rates) 1684 rate = elems->ext_supp_rates 1685 [i - elems->supp_rates_len]; 1686 own_rate = 5 * (rate & 0x7f); 1687 is_basic = !!(rate & 0x80); 1688 1689 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1690 continue; 1691 1692 for (j = 0; j < num_rates; j++) { 1693 int brate; 1694 if ((rate_flags & sband->bitrates[j].flags) 1695 != rate_flags) 1696 continue; 1697 1698 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate, 1699 1 << shift); 1700 1701 if (brate == own_rate) { 1702 supp_rates |= BIT(j); 1703 if (basic_rates && is_basic) 1704 *basic_rates |= BIT(j); 1705 } 1706 } 1707 } 1708 return supp_rates; 1709 } 1710 1711 void ieee80211_stop_device(struct ieee80211_local *local) 1712 { 1713 ieee80211_led_radio(local, false); 1714 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1715 1716 cancel_work_sync(&local->reconfig_filter); 1717 1718 flush_workqueue(local->workqueue); 1719 drv_stop(local); 1720 } 1721 1722 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1723 bool aborted) 1724 { 1725 /* It's possible that we don't handle the scan completion in 1726 * time during suspend, so if it's still marked as completed 1727 * here, queue the work and flush it to clean things up. 1728 * Instead of calling the worker function directly here, we 1729 * really queue it to avoid potential races with other flows 1730 * scheduling the same work. 1731 */ 1732 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1733 /* If coming from reconfiguration failure, abort the scan so 1734 * we don't attempt to continue a partial HW scan - which is 1735 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1736 * completed scan, and a 5 GHz portion is still pending. 1737 */ 1738 if (aborted) 1739 set_bit(SCAN_ABORTED, &local->scanning); 1740 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0); 1741 flush_delayed_work(&local->scan_work); 1742 } 1743 } 1744 1745 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1746 { 1747 struct ieee80211_sub_if_data *sdata; 1748 struct ieee80211_chanctx *ctx; 1749 1750 /* 1751 * We get here if during resume the device can't be restarted properly. 1752 * We might also get here if this happens during HW reset, which is a 1753 * slightly different situation and we need to drop all connections in 1754 * the latter case. 1755 * 1756 * Ask cfg80211 to turn off all interfaces, this will result in more 1757 * warnings but at least we'll then get into a clean stopped state. 1758 */ 1759 1760 local->resuming = false; 1761 local->suspended = false; 1762 local->in_reconfig = false; 1763 1764 ieee80211_flush_completed_scan(local, true); 1765 1766 /* scheduled scan clearly can't be running any more, but tell 1767 * cfg80211 and clear local state 1768 */ 1769 ieee80211_sched_scan_end(local); 1770 1771 list_for_each_entry(sdata, &local->interfaces, list) 1772 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1773 1774 /* Mark channel contexts as not being in the driver any more to avoid 1775 * removing them from the driver during the shutdown process... 1776 */ 1777 mutex_lock(&local->chanctx_mtx); 1778 list_for_each_entry(ctx, &local->chanctx_list, list) 1779 ctx->driver_present = false; 1780 mutex_unlock(&local->chanctx_mtx); 1781 1782 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 1783 } 1784 1785 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1786 struct ieee80211_sub_if_data *sdata) 1787 { 1788 struct ieee80211_chanctx_conf *conf; 1789 struct ieee80211_chanctx *ctx; 1790 1791 if (!local->use_chanctx) 1792 return; 1793 1794 mutex_lock(&local->chanctx_mtx); 1795 conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 1796 lockdep_is_held(&local->chanctx_mtx)); 1797 if (conf) { 1798 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1799 drv_assign_vif_chanctx(local, sdata, ctx); 1800 } 1801 mutex_unlock(&local->chanctx_mtx); 1802 } 1803 1804 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1805 { 1806 struct ieee80211_local *local = sdata->local; 1807 struct sta_info *sta; 1808 1809 /* add STAs back */ 1810 mutex_lock(&local->sta_mtx); 1811 list_for_each_entry(sta, &local->sta_list, list) { 1812 enum ieee80211_sta_state state; 1813 1814 if (!sta->uploaded || sta->sdata != sdata) 1815 continue; 1816 1817 for (state = IEEE80211_STA_NOTEXIST; 1818 state < sta->sta_state; state++) 1819 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1820 state + 1)); 1821 } 1822 mutex_unlock(&local->sta_mtx); 1823 } 1824 1825 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1826 { 1827 struct cfg80211_nan_func *func, **funcs; 1828 int res, id, i = 0; 1829 1830 res = drv_start_nan(sdata->local, sdata, 1831 &sdata->u.nan.conf); 1832 if (WARN_ON(res)) 1833 return res; 1834 1835 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1, 1836 sizeof(*funcs), 1837 GFP_KERNEL); 1838 if (!funcs) 1839 return -ENOMEM; 1840 1841 /* Add all the functions: 1842 * This is a little bit ugly. We need to call a potentially sleeping 1843 * callback for each NAN function, so we can't hold the spinlock. 1844 */ 1845 spin_lock_bh(&sdata->u.nan.func_lock); 1846 1847 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id) 1848 funcs[i++] = func; 1849 1850 spin_unlock_bh(&sdata->u.nan.func_lock); 1851 1852 for (i = 0; funcs[i]; i++) { 1853 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1854 if (WARN_ON(res)) 1855 ieee80211_nan_func_terminated(&sdata->vif, 1856 funcs[i]->instance_id, 1857 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1858 GFP_KERNEL); 1859 } 1860 1861 kfree(funcs); 1862 1863 return 0; 1864 } 1865 1866 int ieee80211_reconfig(struct ieee80211_local *local) 1867 { 1868 struct ieee80211_hw *hw = &local->hw; 1869 struct ieee80211_sub_if_data *sdata; 1870 struct ieee80211_chanctx *ctx; 1871 struct sta_info *sta; 1872 int res, i; 1873 bool reconfig_due_to_wowlan = false; 1874 struct ieee80211_sub_if_data *sched_scan_sdata; 1875 struct cfg80211_sched_scan_request *sched_scan_req; 1876 bool sched_scan_stopped = false; 1877 bool suspended = local->suspended; 1878 1879 /* nothing to do if HW shouldn't run */ 1880 if (!local->open_count) 1881 goto wake_up; 1882 1883 #ifdef CONFIG_PM 1884 if (suspended) 1885 local->resuming = true; 1886 1887 if (local->wowlan) { 1888 /* 1889 * In the wowlan case, both mac80211 and the device 1890 * are functional when the resume op is called, so 1891 * clear local->suspended so the device could operate 1892 * normally (e.g. pass rx frames). 1893 */ 1894 local->suspended = false; 1895 res = drv_resume(local); 1896 local->wowlan = false; 1897 if (res < 0) { 1898 local->resuming = false; 1899 return res; 1900 } 1901 if (res == 0) 1902 goto wake_up; 1903 WARN_ON(res > 1); 1904 /* 1905 * res is 1, which means the driver requested 1906 * to go through a regular reset on wakeup. 1907 * restore local->suspended in this case. 1908 */ 1909 reconfig_due_to_wowlan = true; 1910 local->suspended = true; 1911 } 1912 #endif 1913 1914 /* 1915 * In case of hw_restart during suspend (without wowlan), 1916 * cancel restart work, as we are reconfiguring the device 1917 * anyway. 1918 * Note that restart_work is scheduled on a frozen workqueue, 1919 * so we can't deadlock in this case. 1920 */ 1921 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1922 cancel_work_sync(&local->restart_work); 1923 1924 local->started = false; 1925 1926 /* 1927 * Upon resume hardware can sometimes be goofy due to 1928 * various platform / driver / bus issues, so restarting 1929 * the device may at times not work immediately. Propagate 1930 * the error. 1931 */ 1932 res = drv_start(local); 1933 if (res) { 1934 if (suspended) 1935 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1936 else 1937 WARN(1, "Hardware became unavailable during restart.\n"); 1938 ieee80211_handle_reconfig_failure(local); 1939 return res; 1940 } 1941 1942 /* setup fragmentation threshold */ 1943 drv_set_frag_threshold(local, hw->wiphy->frag_threshold); 1944 1945 /* setup RTS threshold */ 1946 drv_set_rts_threshold(local, hw->wiphy->rts_threshold); 1947 1948 /* reset coverage class */ 1949 drv_set_coverage_class(local, hw->wiphy->coverage_class); 1950 1951 ieee80211_led_radio(local, true); 1952 ieee80211_mod_tpt_led_trig(local, 1953 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1954 1955 /* add interfaces */ 1956 sdata = rtnl_dereference(local->monitor_sdata); 1957 if (sdata) { 1958 /* in HW restart it exists already */ 1959 WARN_ON(local->resuming); 1960 res = drv_add_interface(local, sdata); 1961 if (WARN_ON(res)) { 1962 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1963 synchronize_net(); 1964 kfree(sdata); 1965 } 1966 } 1967 1968 list_for_each_entry(sdata, &local->interfaces, list) { 1969 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1970 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1971 ieee80211_sdata_running(sdata)) { 1972 res = drv_add_interface(local, sdata); 1973 if (WARN_ON(res)) 1974 break; 1975 } 1976 } 1977 1978 /* If adding any of the interfaces failed above, roll back and 1979 * report failure. 1980 */ 1981 if (res) { 1982 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 1983 list) 1984 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 1985 sdata->vif.type != NL80211_IFTYPE_MONITOR && 1986 ieee80211_sdata_running(sdata)) 1987 drv_remove_interface(local, sdata); 1988 ieee80211_handle_reconfig_failure(local); 1989 return res; 1990 } 1991 1992 /* add channel contexts */ 1993 if (local->use_chanctx) { 1994 mutex_lock(&local->chanctx_mtx); 1995 list_for_each_entry(ctx, &local->chanctx_list, list) 1996 if (ctx->replace_state != 1997 IEEE80211_CHANCTX_REPLACES_OTHER) 1998 WARN_ON(drv_add_chanctx(local, ctx)); 1999 mutex_unlock(&local->chanctx_mtx); 2000 2001 sdata = rtnl_dereference(local->monitor_sdata); 2002 if (sdata && ieee80211_sdata_running(sdata)) 2003 ieee80211_assign_chanctx(local, sdata); 2004 } 2005 2006 /* reconfigure hardware */ 2007 ieee80211_hw_config(local, ~0); 2008 2009 ieee80211_configure_filter(local); 2010 2011 /* Finally also reconfigure all the BSS information */ 2012 list_for_each_entry(sdata, &local->interfaces, list) { 2013 u32 changed; 2014 2015 if (!ieee80211_sdata_running(sdata)) 2016 continue; 2017 2018 ieee80211_assign_chanctx(local, sdata); 2019 2020 switch (sdata->vif.type) { 2021 case NL80211_IFTYPE_AP_VLAN: 2022 case NL80211_IFTYPE_MONITOR: 2023 break; 2024 default: 2025 ieee80211_reconfig_stations(sdata); 2026 /* fall through */ 2027 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2028 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2029 drv_conf_tx(local, sdata, i, 2030 &sdata->tx_conf[i]); 2031 break; 2032 } 2033 2034 /* common change flags for all interface types */ 2035 changed = BSS_CHANGED_ERP_CTS_PROT | 2036 BSS_CHANGED_ERP_PREAMBLE | 2037 BSS_CHANGED_ERP_SLOT | 2038 BSS_CHANGED_HT | 2039 BSS_CHANGED_BASIC_RATES | 2040 BSS_CHANGED_BEACON_INT | 2041 BSS_CHANGED_BSSID | 2042 BSS_CHANGED_CQM | 2043 BSS_CHANGED_QOS | 2044 BSS_CHANGED_IDLE | 2045 BSS_CHANGED_TXPOWER | 2046 BSS_CHANGED_MCAST_RATE; 2047 2048 if (sdata->vif.mu_mimo_owner) 2049 changed |= BSS_CHANGED_MU_GROUPS; 2050 2051 switch (sdata->vif.type) { 2052 case NL80211_IFTYPE_STATION: 2053 changed |= BSS_CHANGED_ASSOC | 2054 BSS_CHANGED_ARP_FILTER | 2055 BSS_CHANGED_PS; 2056 2057 /* Re-send beacon info report to the driver */ 2058 if (sdata->u.mgd.have_beacon) 2059 changed |= BSS_CHANGED_BEACON_INFO; 2060 2061 if (sdata->vif.bss_conf.max_idle_period || 2062 sdata->vif.bss_conf.protected_keep_alive) 2063 changed |= BSS_CHANGED_KEEP_ALIVE; 2064 2065 sdata_lock(sdata); 2066 ieee80211_bss_info_change_notify(sdata, changed); 2067 sdata_unlock(sdata); 2068 break; 2069 case NL80211_IFTYPE_OCB: 2070 changed |= BSS_CHANGED_OCB; 2071 ieee80211_bss_info_change_notify(sdata, changed); 2072 break; 2073 case NL80211_IFTYPE_ADHOC: 2074 changed |= BSS_CHANGED_IBSS; 2075 /* fall through */ 2076 case NL80211_IFTYPE_AP: 2077 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS; 2078 2079 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2080 changed |= BSS_CHANGED_AP_PROBE_RESP; 2081 2082 if (rcu_access_pointer(sdata->u.ap.beacon)) 2083 drv_start_ap(local, sdata); 2084 } 2085 2086 /* fall through */ 2087 case NL80211_IFTYPE_MESH_POINT: 2088 if (sdata->vif.bss_conf.enable_beacon) { 2089 changed |= BSS_CHANGED_BEACON | 2090 BSS_CHANGED_BEACON_ENABLED; 2091 ieee80211_bss_info_change_notify(sdata, changed); 2092 } 2093 break; 2094 case NL80211_IFTYPE_NAN: 2095 res = ieee80211_reconfig_nan(sdata); 2096 if (res < 0) { 2097 ieee80211_handle_reconfig_failure(local); 2098 return res; 2099 } 2100 break; 2101 case NL80211_IFTYPE_WDS: 2102 case NL80211_IFTYPE_AP_VLAN: 2103 case NL80211_IFTYPE_MONITOR: 2104 case NL80211_IFTYPE_P2P_DEVICE: 2105 /* nothing to do */ 2106 break; 2107 case NL80211_IFTYPE_UNSPECIFIED: 2108 case NUM_NL80211_IFTYPES: 2109 case NL80211_IFTYPE_P2P_CLIENT: 2110 case NL80211_IFTYPE_P2P_GO: 2111 WARN_ON(1); 2112 break; 2113 } 2114 } 2115 2116 ieee80211_recalc_ps(local); 2117 2118 /* 2119 * The sta might be in psm against the ap (e.g. because 2120 * this was the state before a hw restart), so we 2121 * explicitly send a null packet in order to make sure 2122 * it'll sync against the ap (and get out of psm). 2123 */ 2124 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2125 list_for_each_entry(sdata, &local->interfaces, list) { 2126 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2127 continue; 2128 if (!sdata->u.mgd.associated) 2129 continue; 2130 2131 ieee80211_send_nullfunc(local, sdata, false); 2132 } 2133 } 2134 2135 /* APs are now beaconing, add back stations */ 2136 mutex_lock(&local->sta_mtx); 2137 list_for_each_entry(sta, &local->sta_list, list) { 2138 enum ieee80211_sta_state state; 2139 2140 if (!sta->uploaded) 2141 continue; 2142 2143 if (sta->sdata->vif.type != NL80211_IFTYPE_AP && 2144 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN) 2145 continue; 2146 2147 for (state = IEEE80211_STA_NOTEXIST; 2148 state < sta->sta_state; state++) 2149 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 2150 state + 1)); 2151 } 2152 mutex_unlock(&local->sta_mtx); 2153 2154 /* add back keys */ 2155 list_for_each_entry(sdata, &local->interfaces, list) 2156 ieee80211_reset_crypto_tx_tailroom(sdata); 2157 2158 list_for_each_entry(sdata, &local->interfaces, list) 2159 if (ieee80211_sdata_running(sdata)) 2160 ieee80211_enable_keys(sdata); 2161 2162 /* Reconfigure sched scan if it was interrupted by FW restart */ 2163 mutex_lock(&local->mtx); 2164 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2165 lockdep_is_held(&local->mtx)); 2166 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2167 lockdep_is_held(&local->mtx)); 2168 if (sched_scan_sdata && sched_scan_req) 2169 /* 2170 * Sched scan stopped, but we don't want to report it. Instead, 2171 * we're trying to reschedule. However, if more than one scan 2172 * plan was set, we cannot reschedule since we don't know which 2173 * scan plan was currently running (and some scan plans may have 2174 * already finished). 2175 */ 2176 if (sched_scan_req->n_scan_plans > 1 || 2177 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2178 sched_scan_req)) { 2179 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2180 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2181 sched_scan_stopped = true; 2182 } 2183 mutex_unlock(&local->mtx); 2184 2185 if (sched_scan_stopped) 2186 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0); 2187 2188 wake_up: 2189 2190 if (local->monitors == local->open_count && local->monitors > 0) 2191 ieee80211_add_virtual_monitor(local); 2192 2193 /* 2194 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2195 * sessions can be established after a resume. 2196 * 2197 * Also tear down aggregation sessions since reconfiguring 2198 * them in a hardware restart scenario is not easily done 2199 * right now, and the hardware will have lost information 2200 * about the sessions, but we and the AP still think they 2201 * are active. This is really a workaround though. 2202 */ 2203 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2204 mutex_lock(&local->sta_mtx); 2205 2206 list_for_each_entry(sta, &local->sta_list, list) { 2207 if (!local->resuming) 2208 ieee80211_sta_tear_down_BA_sessions( 2209 sta, AGG_STOP_LOCAL_REQUEST); 2210 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2211 } 2212 2213 mutex_unlock(&local->sta_mtx); 2214 } 2215 2216 if (local->in_reconfig) { 2217 local->in_reconfig = false; 2218 barrier(); 2219 2220 /* Restart deferred ROCs */ 2221 mutex_lock(&local->mtx); 2222 ieee80211_start_next_roc(local); 2223 mutex_unlock(&local->mtx); 2224 } 2225 2226 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2227 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2228 false); 2229 2230 /* 2231 * If this is for hw restart things are still running. 2232 * We may want to change that later, however. 2233 */ 2234 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2235 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2236 2237 if (!suspended) 2238 return 0; 2239 2240 #ifdef CONFIG_PM 2241 /* first set suspended false, then resuming */ 2242 local->suspended = false; 2243 mb(); 2244 local->resuming = false; 2245 2246 ieee80211_flush_completed_scan(local, false); 2247 2248 if (local->open_count && !reconfig_due_to_wowlan) 2249 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2250 2251 list_for_each_entry(sdata, &local->interfaces, list) { 2252 if (!ieee80211_sdata_running(sdata)) 2253 continue; 2254 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2255 ieee80211_sta_restart(sdata); 2256 } 2257 2258 mod_timer(&local->sta_cleanup, jiffies + 1); 2259 #else 2260 WARN_ON(1); 2261 #endif 2262 2263 return 0; 2264 } 2265 2266 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2267 { 2268 struct ieee80211_sub_if_data *sdata; 2269 struct ieee80211_local *local; 2270 struct ieee80211_key *key; 2271 2272 if (WARN_ON(!vif)) 2273 return; 2274 2275 sdata = vif_to_sdata(vif); 2276 local = sdata->local; 2277 2278 if (WARN_ON(!local->resuming)) 2279 return; 2280 2281 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2282 return; 2283 2284 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME; 2285 2286 mutex_lock(&local->key_mtx); 2287 list_for_each_entry(key, &sdata->key_list, list) 2288 key->flags |= KEY_FLAG_TAINTED; 2289 mutex_unlock(&local->key_mtx); 2290 } 2291 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2292 2293 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata) 2294 { 2295 struct ieee80211_local *local = sdata->local; 2296 struct ieee80211_chanctx_conf *chanctx_conf; 2297 struct ieee80211_chanctx *chanctx; 2298 2299 mutex_lock(&local->chanctx_mtx); 2300 2301 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2302 lockdep_is_held(&local->chanctx_mtx)); 2303 2304 /* 2305 * This function can be called from a work, thus it may be possible 2306 * that the chanctx_conf is removed (due to a disconnection, for 2307 * example). 2308 * So nothing should be done in such case. 2309 */ 2310 if (!chanctx_conf) 2311 goto unlock; 2312 2313 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2314 ieee80211_recalc_smps_chanctx(local, chanctx); 2315 unlock: 2316 mutex_unlock(&local->chanctx_mtx); 2317 } 2318 2319 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata) 2320 { 2321 struct ieee80211_local *local = sdata->local; 2322 struct ieee80211_chanctx_conf *chanctx_conf; 2323 struct ieee80211_chanctx *chanctx; 2324 2325 mutex_lock(&local->chanctx_mtx); 2326 2327 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf, 2328 lockdep_is_held(&local->chanctx_mtx)); 2329 2330 if (WARN_ON_ONCE(!chanctx_conf)) 2331 goto unlock; 2332 2333 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2334 ieee80211_recalc_chanctx_min_def(local, chanctx); 2335 unlock: 2336 mutex_unlock(&local->chanctx_mtx); 2337 } 2338 2339 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2340 { 2341 size_t pos = offset; 2342 2343 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2344 pos += 2 + ies[pos + 1]; 2345 2346 return pos; 2347 } 2348 2349 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 2350 int rssi_min_thold, 2351 int rssi_max_thold) 2352 { 2353 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 2354 2355 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2356 return; 2357 2358 /* 2359 * Scale up threshold values before storing it, as the RSSI averaging 2360 * algorithm uses a scaled up value as well. Change this scaling 2361 * factor if the RSSI averaging algorithm changes. 2362 */ 2363 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 2364 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 2365 } 2366 2367 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 2368 int rssi_min_thold, 2369 int rssi_max_thold) 2370 { 2371 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2372 2373 WARN_ON(rssi_min_thold == rssi_max_thold || 2374 rssi_min_thold > rssi_max_thold); 2375 2376 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 2377 rssi_max_thold); 2378 } 2379 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 2380 2381 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 2382 { 2383 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2384 2385 _ieee80211_enable_rssi_reports(sdata, 0, 0); 2386 } 2387 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 2388 2389 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2390 u16 cap) 2391 { 2392 __le16 tmp; 2393 2394 *pos++ = WLAN_EID_HT_CAPABILITY; 2395 *pos++ = sizeof(struct ieee80211_ht_cap); 2396 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2397 2398 /* capability flags */ 2399 tmp = cpu_to_le16(cap); 2400 memcpy(pos, &tmp, sizeof(u16)); 2401 pos += sizeof(u16); 2402 2403 /* AMPDU parameters */ 2404 *pos++ = ht_cap->ampdu_factor | 2405 (ht_cap->ampdu_density << 2406 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2407 2408 /* MCS set */ 2409 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2410 pos += sizeof(ht_cap->mcs); 2411 2412 /* extended capabilities */ 2413 pos += sizeof(__le16); 2414 2415 /* BF capabilities */ 2416 pos += sizeof(__le32); 2417 2418 /* antenna selection */ 2419 pos += sizeof(u8); 2420 2421 return pos; 2422 } 2423 2424 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2425 u32 cap) 2426 { 2427 __le32 tmp; 2428 2429 *pos++ = WLAN_EID_VHT_CAPABILITY; 2430 *pos++ = sizeof(struct ieee80211_vht_cap); 2431 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2432 2433 /* capability flags */ 2434 tmp = cpu_to_le32(cap); 2435 memcpy(pos, &tmp, sizeof(u32)); 2436 pos += sizeof(u32); 2437 2438 /* VHT MCS set */ 2439 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2440 pos += sizeof(vht_cap->vht_mcs); 2441 2442 return pos; 2443 } 2444 2445 u8 *ieee80211_ie_build_he_cap(u8 *pos, 2446 const struct ieee80211_sta_he_cap *he_cap, 2447 u8 *end) 2448 { 2449 u8 n; 2450 u8 ie_len; 2451 u8 *orig_pos = pos; 2452 2453 /* Make sure we have place for the IE */ 2454 /* 2455 * TODO: the 1 added is because this temporarily is under the EXTENSION 2456 * IE. Get rid of it when it moves. 2457 */ 2458 if (!he_cap) 2459 return orig_pos; 2460 2461 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2462 ie_len = 2 + 1 + 2463 sizeof(he_cap->he_cap_elem) + n + 2464 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2465 he_cap->he_cap_elem.phy_cap_info); 2466 2467 if ((end - pos) < ie_len) 2468 return orig_pos; 2469 2470 *pos++ = WLAN_EID_EXTENSION; 2471 pos++; /* We'll set the size later below */ 2472 *pos++ = WLAN_EID_EXT_HE_CAPABILITY; 2473 2474 /* Fixed data */ 2475 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem)); 2476 pos += sizeof(he_cap->he_cap_elem); 2477 2478 memcpy(pos, &he_cap->he_mcs_nss_supp, n); 2479 pos += n; 2480 2481 /* Check if PPE Threshold should be present */ 2482 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2483 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2484 goto end; 2485 2486 /* 2487 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2488 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2489 */ 2490 n = hweight8(he_cap->ppe_thres[0] & 2491 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2492 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2493 IEEE80211_PPE_THRES_NSS_POS)); 2494 2495 /* 2496 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2497 * total size. 2498 */ 2499 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2500 n = DIV_ROUND_UP(n, 8); 2501 2502 /* Copy PPE Thresholds */ 2503 memcpy(pos, &he_cap->ppe_thres, n); 2504 pos += n; 2505 2506 end: 2507 orig_pos[1] = (pos - orig_pos) - 2; 2508 return pos; 2509 } 2510 2511 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2512 const struct cfg80211_chan_def *chandef, 2513 u16 prot_mode, bool rifs_mode) 2514 { 2515 struct ieee80211_ht_operation *ht_oper; 2516 /* Build HT Information */ 2517 *pos++ = WLAN_EID_HT_OPERATION; 2518 *pos++ = sizeof(struct ieee80211_ht_operation); 2519 ht_oper = (struct ieee80211_ht_operation *)pos; 2520 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2521 chandef->chan->center_freq); 2522 switch (chandef->width) { 2523 case NL80211_CHAN_WIDTH_160: 2524 case NL80211_CHAN_WIDTH_80P80: 2525 case NL80211_CHAN_WIDTH_80: 2526 case NL80211_CHAN_WIDTH_40: 2527 if (chandef->center_freq1 > chandef->chan->center_freq) 2528 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2529 else 2530 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2531 break; 2532 default: 2533 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2534 break; 2535 } 2536 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2537 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2538 chandef->width != NL80211_CHAN_WIDTH_20) 2539 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2540 2541 if (rifs_mode) 2542 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2543 2544 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2545 ht_oper->stbc_param = 0x0000; 2546 2547 /* It seems that Basic MCS set and Supported MCS set 2548 are identical for the first 10 bytes */ 2549 memset(&ht_oper->basic_set, 0, 16); 2550 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2551 2552 return pos + sizeof(struct ieee80211_ht_operation); 2553 } 2554 2555 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2556 const struct cfg80211_chan_def *chandef) 2557 { 2558 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2559 *pos++ = 3; /* IE length */ 2560 /* New channel width */ 2561 switch (chandef->width) { 2562 case NL80211_CHAN_WIDTH_80: 2563 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2564 break; 2565 case NL80211_CHAN_WIDTH_160: 2566 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2567 break; 2568 case NL80211_CHAN_WIDTH_80P80: 2569 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2570 break; 2571 default: 2572 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2573 } 2574 2575 /* new center frequency segment 0 */ 2576 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2577 /* new center frequency segment 1 */ 2578 if (chandef->center_freq2) 2579 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2580 else 2581 *pos++ = 0; 2582 } 2583 2584 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2585 const struct cfg80211_chan_def *chandef) 2586 { 2587 struct ieee80211_vht_operation *vht_oper; 2588 2589 *pos++ = WLAN_EID_VHT_OPERATION; 2590 *pos++ = sizeof(struct ieee80211_vht_operation); 2591 vht_oper = (struct ieee80211_vht_operation *)pos; 2592 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2593 chandef->center_freq1); 2594 if (chandef->center_freq2) 2595 vht_oper->center_freq_seg1_idx = 2596 ieee80211_frequency_to_channel(chandef->center_freq2); 2597 else 2598 vht_oper->center_freq_seg1_idx = 0x00; 2599 2600 switch (chandef->width) { 2601 case NL80211_CHAN_WIDTH_160: 2602 /* 2603 * Convert 160 MHz channel width to new style as interop 2604 * workaround. 2605 */ 2606 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2607 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2608 if (chandef->chan->center_freq < chandef->center_freq1) 2609 vht_oper->center_freq_seg0_idx -= 8; 2610 else 2611 vht_oper->center_freq_seg0_idx += 8; 2612 break; 2613 case NL80211_CHAN_WIDTH_80P80: 2614 /* 2615 * Convert 80+80 MHz channel width to new style as interop 2616 * workaround. 2617 */ 2618 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2619 break; 2620 case NL80211_CHAN_WIDTH_80: 2621 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2622 break; 2623 default: 2624 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2625 break; 2626 } 2627 2628 /* don't require special VHT peer rates */ 2629 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2630 2631 return pos + sizeof(struct ieee80211_vht_operation); 2632 } 2633 2634 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 2635 struct cfg80211_chan_def *chandef) 2636 { 2637 enum nl80211_channel_type channel_type; 2638 2639 if (!ht_oper) 2640 return false; 2641 2642 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 2643 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 2644 channel_type = NL80211_CHAN_HT20; 2645 break; 2646 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 2647 channel_type = NL80211_CHAN_HT40PLUS; 2648 break; 2649 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 2650 channel_type = NL80211_CHAN_HT40MINUS; 2651 break; 2652 default: 2653 channel_type = NL80211_CHAN_NO_HT; 2654 return false; 2655 } 2656 2657 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 2658 return true; 2659 } 2660 2661 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper, 2662 struct cfg80211_chan_def *chandef) 2663 { 2664 struct cfg80211_chan_def new = *chandef; 2665 int cf1, cf2; 2666 2667 if (!oper) 2668 return false; 2669 2670 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx, 2671 chandef->chan->band); 2672 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx, 2673 chandef->chan->band); 2674 2675 switch (oper->chan_width) { 2676 case IEEE80211_VHT_CHANWIDTH_USE_HT: 2677 break; 2678 case IEEE80211_VHT_CHANWIDTH_80MHZ: 2679 new.width = NL80211_CHAN_WIDTH_80; 2680 new.center_freq1 = cf1; 2681 /* If needed, adjust based on the newer interop workaround. */ 2682 if (oper->center_freq_seg1_idx) { 2683 unsigned int diff; 2684 2685 diff = abs(oper->center_freq_seg1_idx - 2686 oper->center_freq_seg0_idx); 2687 if (diff == 8) { 2688 new.width = NL80211_CHAN_WIDTH_160; 2689 new.center_freq1 = cf2; 2690 } else if (diff > 8) { 2691 new.width = NL80211_CHAN_WIDTH_80P80; 2692 new.center_freq2 = cf2; 2693 } 2694 } 2695 break; 2696 case IEEE80211_VHT_CHANWIDTH_160MHZ: 2697 new.width = NL80211_CHAN_WIDTH_160; 2698 new.center_freq1 = cf1; 2699 break; 2700 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 2701 new.width = NL80211_CHAN_WIDTH_80P80; 2702 new.center_freq1 = cf1; 2703 new.center_freq2 = cf2; 2704 break; 2705 default: 2706 return false; 2707 } 2708 2709 if (!cfg80211_chandef_valid(&new)) 2710 return false; 2711 2712 *chandef = new; 2713 return true; 2714 } 2715 2716 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef, 2717 const struct ieee80211_supported_band *sband, 2718 const u8 *srates, int srates_len, u32 *rates) 2719 { 2720 u32 rate_flags = ieee80211_chandef_rate_flags(chandef); 2721 int shift = ieee80211_chandef_get_shift(chandef); 2722 struct ieee80211_rate *br; 2723 int brate, rate, i, j, count = 0; 2724 2725 *rates = 0; 2726 2727 for (i = 0; i < srates_len; i++) { 2728 rate = srates[i] & 0x7f; 2729 2730 for (j = 0; j < sband->n_bitrates; j++) { 2731 br = &sband->bitrates[j]; 2732 if ((rate_flags & br->flags) != rate_flags) 2733 continue; 2734 2735 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5); 2736 if (brate == rate) { 2737 *rates |= BIT(j); 2738 count++; 2739 break; 2740 } 2741 } 2742 } 2743 return count; 2744 } 2745 2746 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata, 2747 struct sk_buff *skb, bool need_basic, 2748 enum nl80211_band band) 2749 { 2750 struct ieee80211_local *local = sdata->local; 2751 struct ieee80211_supported_band *sband; 2752 int rate, shift; 2753 u8 i, rates, *pos; 2754 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2755 u32 rate_flags; 2756 2757 shift = ieee80211_vif_get_shift(&sdata->vif); 2758 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2759 sband = local->hw.wiphy->bands[band]; 2760 rates = 0; 2761 for (i = 0; i < sband->n_bitrates; i++) { 2762 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2763 continue; 2764 rates++; 2765 } 2766 if (rates > 8) 2767 rates = 8; 2768 2769 if (skb_tailroom(skb) < rates + 2) 2770 return -ENOMEM; 2771 2772 pos = skb_put(skb, rates + 2); 2773 *pos++ = WLAN_EID_SUPP_RATES; 2774 *pos++ = rates; 2775 for (i = 0; i < rates; i++) { 2776 u8 basic = 0; 2777 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2778 continue; 2779 2780 if (need_basic && basic_rates & BIT(i)) 2781 basic = 0x80; 2782 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2783 5 * (1 << shift)); 2784 *pos++ = basic | (u8) rate; 2785 } 2786 2787 return 0; 2788 } 2789 2790 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata, 2791 struct sk_buff *skb, bool need_basic, 2792 enum nl80211_band band) 2793 { 2794 struct ieee80211_local *local = sdata->local; 2795 struct ieee80211_supported_band *sband; 2796 int rate, shift; 2797 u8 i, exrates, *pos; 2798 u32 basic_rates = sdata->vif.bss_conf.basic_rates; 2799 u32 rate_flags; 2800 2801 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); 2802 shift = ieee80211_vif_get_shift(&sdata->vif); 2803 2804 sband = local->hw.wiphy->bands[band]; 2805 exrates = 0; 2806 for (i = 0; i < sband->n_bitrates; i++) { 2807 if ((rate_flags & sband->bitrates[i].flags) != rate_flags) 2808 continue; 2809 exrates++; 2810 } 2811 2812 if (exrates > 8) 2813 exrates -= 8; 2814 else 2815 exrates = 0; 2816 2817 if (skb_tailroom(skb) < exrates + 2) 2818 return -ENOMEM; 2819 2820 if (exrates) { 2821 pos = skb_put(skb, exrates + 2); 2822 *pos++ = WLAN_EID_EXT_SUPP_RATES; 2823 *pos++ = exrates; 2824 for (i = 8; i < sband->n_bitrates; i++) { 2825 u8 basic = 0; 2826 if ((rate_flags & sband->bitrates[i].flags) 2827 != rate_flags) 2828 continue; 2829 if (need_basic && basic_rates & BIT(i)) 2830 basic = 0x80; 2831 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 2832 5 * (1 << shift)); 2833 *pos++ = basic | (u8) rate; 2834 } 2835 } 2836 return 0; 2837 } 2838 2839 int ieee80211_ave_rssi(struct ieee80211_vif *vif) 2840 { 2841 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2843 2844 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) { 2845 /* non-managed type inferfaces */ 2846 return 0; 2847 } 2848 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal); 2849 } 2850 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 2851 2852 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 2853 { 2854 if (!mcs) 2855 return 1; 2856 2857 /* TODO: consider rx_highest */ 2858 2859 if (mcs->rx_mask[3]) 2860 return 4; 2861 if (mcs->rx_mask[2]) 2862 return 3; 2863 if (mcs->rx_mask[1]) 2864 return 2; 2865 return 1; 2866 } 2867 2868 /** 2869 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame 2870 * @local: mac80211 hw info struct 2871 * @status: RX status 2872 * @mpdu_len: total MPDU length (including FCS) 2873 * @mpdu_offset: offset into MPDU to calculate timestamp at 2874 * 2875 * This function calculates the RX timestamp at the given MPDU offset, taking 2876 * into account what the RX timestamp was. An offset of 0 will just normalize 2877 * the timestamp to TSF at beginning of MPDU reception. 2878 */ 2879 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, 2880 struct ieee80211_rx_status *status, 2881 unsigned int mpdu_len, 2882 unsigned int mpdu_offset) 2883 { 2884 u64 ts = status->mactime; 2885 struct rate_info ri; 2886 u16 rate; 2887 2888 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 2889 return 0; 2890 2891 memset(&ri, 0, sizeof(ri)); 2892 2893 ri.bw = status->bw; 2894 2895 /* Fill cfg80211 rate info */ 2896 switch (status->encoding) { 2897 case RX_ENC_HT: 2898 ri.mcs = status->rate_idx; 2899 ri.flags |= RATE_INFO_FLAGS_MCS; 2900 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2901 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2902 break; 2903 case RX_ENC_VHT: 2904 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 2905 ri.mcs = status->rate_idx; 2906 ri.nss = status->nss; 2907 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 2908 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 2909 break; 2910 default: 2911 WARN_ON(1); 2912 /* fall through */ 2913 case RX_ENC_LEGACY: { 2914 struct ieee80211_supported_band *sband; 2915 int shift = 0; 2916 int bitrate; 2917 2918 switch (status->bw) { 2919 case RATE_INFO_BW_10: 2920 shift = 1; 2921 break; 2922 case RATE_INFO_BW_5: 2923 shift = 2; 2924 break; 2925 } 2926 2927 sband = local->hw.wiphy->bands[status->band]; 2928 bitrate = sband->bitrates[status->rate_idx].bitrate; 2929 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); 2930 2931 if (status->flag & RX_FLAG_MACTIME_PLCP_START) { 2932 /* TODO: handle HT/VHT preambles */ 2933 if (status->band == NL80211_BAND_5GHZ) { 2934 ts += 20 << shift; 2935 mpdu_offset += 2; 2936 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 2937 ts += 96; 2938 } else { 2939 ts += 192; 2940 } 2941 } 2942 break; 2943 } 2944 } 2945 2946 rate = cfg80211_calculate_bitrate(&ri); 2947 if (WARN_ONCE(!rate, 2948 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 2949 (unsigned long long)status->flag, status->rate_idx, 2950 status->nss)) 2951 return 0; 2952 2953 /* rewind from end of MPDU */ 2954 if (status->flag & RX_FLAG_MACTIME_END) 2955 ts -= mpdu_len * 8 * 10 / rate; 2956 2957 ts += mpdu_offset * 8 * 10 / rate; 2958 2959 return ts; 2960 } 2961 2962 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local) 2963 { 2964 struct ieee80211_sub_if_data *sdata; 2965 struct cfg80211_chan_def chandef; 2966 2967 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */ 2968 ASSERT_RTNL(); 2969 2970 mutex_lock(&local->mtx); 2971 list_for_each_entry(sdata, &local->interfaces, list) { 2972 /* it might be waiting for the local->mtx, but then 2973 * by the time it gets it, sdata->wdev.cac_started 2974 * will no longer be true 2975 */ 2976 cancel_delayed_work(&sdata->dfs_cac_timer_work); 2977 2978 if (sdata->wdev.cac_started) { 2979 chandef = sdata->vif.bss_conf.chandef; 2980 ieee80211_vif_release_channel(sdata); 2981 cfg80211_cac_event(sdata->dev, 2982 &chandef, 2983 NL80211_RADAR_CAC_ABORTED, 2984 GFP_KERNEL); 2985 } 2986 } 2987 mutex_unlock(&local->mtx); 2988 } 2989 2990 void ieee80211_dfs_radar_detected_work(struct work_struct *work) 2991 { 2992 struct ieee80211_local *local = 2993 container_of(work, struct ieee80211_local, radar_detected_work); 2994 struct cfg80211_chan_def chandef = local->hw.conf.chandef; 2995 struct ieee80211_chanctx *ctx; 2996 int num_chanctx = 0; 2997 2998 mutex_lock(&local->chanctx_mtx); 2999 list_for_each_entry(ctx, &local->chanctx_list, list) { 3000 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3001 continue; 3002 3003 num_chanctx++; 3004 chandef = ctx->conf.def; 3005 } 3006 mutex_unlock(&local->chanctx_mtx); 3007 3008 rtnl_lock(); 3009 ieee80211_dfs_cac_cancel(local); 3010 rtnl_unlock(); 3011 3012 if (num_chanctx > 1) 3013 /* XXX: multi-channel is not supported yet */ 3014 WARN_ON(1); 3015 else 3016 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3017 } 3018 3019 void ieee80211_radar_detected(struct ieee80211_hw *hw) 3020 { 3021 struct ieee80211_local *local = hw_to_local(hw); 3022 3023 trace_api_radar_detected(local); 3024 3025 schedule_work(&local->radar_detected_work); 3026 } 3027 EXPORT_SYMBOL(ieee80211_radar_detected); 3028 3029 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c) 3030 { 3031 u32 ret; 3032 int tmp; 3033 3034 switch (c->width) { 3035 case NL80211_CHAN_WIDTH_20: 3036 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3037 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3038 break; 3039 case NL80211_CHAN_WIDTH_40: 3040 c->width = NL80211_CHAN_WIDTH_20; 3041 c->center_freq1 = c->chan->center_freq; 3042 ret = IEEE80211_STA_DISABLE_40MHZ | 3043 IEEE80211_STA_DISABLE_VHT; 3044 break; 3045 case NL80211_CHAN_WIDTH_80: 3046 tmp = (30 + c->chan->center_freq - c->center_freq1)/20; 3047 /* n_P40 */ 3048 tmp /= 2; 3049 /* freq_P40 */ 3050 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp; 3051 c->width = NL80211_CHAN_WIDTH_40; 3052 ret = IEEE80211_STA_DISABLE_VHT; 3053 break; 3054 case NL80211_CHAN_WIDTH_80P80: 3055 c->center_freq2 = 0; 3056 c->width = NL80211_CHAN_WIDTH_80; 3057 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3058 IEEE80211_STA_DISABLE_160MHZ; 3059 break; 3060 case NL80211_CHAN_WIDTH_160: 3061 /* n_P20 */ 3062 tmp = (70 + c->chan->center_freq - c->center_freq1)/20; 3063 /* n_P80 */ 3064 tmp /= 4; 3065 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp; 3066 c->width = NL80211_CHAN_WIDTH_80; 3067 ret = IEEE80211_STA_DISABLE_80P80MHZ | 3068 IEEE80211_STA_DISABLE_160MHZ; 3069 break; 3070 default: 3071 case NL80211_CHAN_WIDTH_20_NOHT: 3072 WARN_ON_ONCE(1); 3073 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3074 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3075 break; 3076 case NL80211_CHAN_WIDTH_5: 3077 case NL80211_CHAN_WIDTH_10: 3078 WARN_ON_ONCE(1); 3079 /* keep c->width */ 3080 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT; 3081 break; 3082 } 3083 3084 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3085 3086 return ret; 3087 } 3088 3089 /* 3090 * Returns true if smps_mode_new is strictly more restrictive than 3091 * smps_mode_old. 3092 */ 3093 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old, 3094 enum ieee80211_smps_mode smps_mode_new) 3095 { 3096 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC || 3097 smps_mode_new == IEEE80211_SMPS_AUTOMATIC)) 3098 return false; 3099 3100 switch (smps_mode_old) { 3101 case IEEE80211_SMPS_STATIC: 3102 return false; 3103 case IEEE80211_SMPS_DYNAMIC: 3104 return smps_mode_new == IEEE80211_SMPS_STATIC; 3105 case IEEE80211_SMPS_OFF: 3106 return smps_mode_new != IEEE80211_SMPS_OFF; 3107 default: 3108 WARN_ON(1); 3109 } 3110 3111 return false; 3112 } 3113 3114 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3115 struct cfg80211_csa_settings *csa_settings) 3116 { 3117 struct sk_buff *skb; 3118 struct ieee80211_mgmt *mgmt; 3119 struct ieee80211_local *local = sdata->local; 3120 int freq; 3121 int hdr_len = offsetofend(struct ieee80211_mgmt, 3122 u.action.u.chan_switch); 3123 u8 *pos; 3124 3125 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3126 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3127 return -EOPNOTSUPP; 3128 3129 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3130 5 + /* channel switch announcement element */ 3131 3 + /* secondary channel offset element */ 3132 5 + /* wide bandwidth channel switch announcement */ 3133 8); /* mesh channel switch parameters element */ 3134 if (!skb) 3135 return -ENOMEM; 3136 3137 skb_reserve(skb, local->tx_headroom); 3138 mgmt = skb_put_zero(skb, hdr_len); 3139 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3140 IEEE80211_STYPE_ACTION); 3141 3142 eth_broadcast_addr(mgmt->da); 3143 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3144 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3145 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3146 } else { 3147 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3148 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3149 } 3150 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3151 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3152 pos = skb_put(skb, 5); 3153 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3154 *pos++ = 3; /* IE length */ 3155 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3156 freq = csa_settings->chandef.chan->center_freq; 3157 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3158 *pos++ = csa_settings->count; /* count */ 3159 3160 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3161 enum nl80211_channel_type ch_type; 3162 3163 skb_put(skb, 3); 3164 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3165 *pos++ = 1; /* IE length */ 3166 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3167 if (ch_type == NL80211_CHAN_HT40PLUS) 3168 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3169 else 3170 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3171 } 3172 3173 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3174 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3175 3176 skb_put(skb, 8); 3177 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3178 *pos++ = 6; /* IE length */ 3179 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3180 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3181 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3182 *pos++ |= csa_settings->block_tx ? 3183 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3184 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3185 pos += 2; 3186 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3187 pos += 2; 3188 } 3189 3190 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3191 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3192 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3193 skb_put(skb, 5); 3194 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3195 } 3196 3197 ieee80211_tx_skb(sdata, skb); 3198 return 0; 3199 } 3200 3201 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs) 3202 { 3203 return !(cs == NULL || cs->cipher == 0 || 3204 cs->hdr_len < cs->pn_len + cs->pn_off || 3205 cs->hdr_len <= cs->key_idx_off || 3206 cs->key_idx_shift > 7 || 3207 cs->key_idx_mask == 0); 3208 } 3209 3210 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n) 3211 { 3212 int i; 3213 3214 /* Ensure we have enough iftype bitmap space for all iftype values */ 3215 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype)); 3216 3217 for (i = 0; i < n; i++) 3218 if (!ieee80211_cs_valid(&cs[i])) 3219 return false; 3220 3221 return true; 3222 } 3223 3224 const struct ieee80211_cipher_scheme * 3225 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher, 3226 enum nl80211_iftype iftype) 3227 { 3228 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes; 3229 int n = local->hw.n_cipher_schemes; 3230 int i; 3231 const struct ieee80211_cipher_scheme *cs = NULL; 3232 3233 for (i = 0; i < n; i++) { 3234 if (l[i].cipher == cipher) { 3235 cs = &l[i]; 3236 break; 3237 } 3238 } 3239 3240 if (!cs || !(cs->iftype & BIT(iftype))) 3241 return NULL; 3242 3243 return cs; 3244 } 3245 3246 int ieee80211_cs_headroom(struct ieee80211_local *local, 3247 struct cfg80211_crypto_settings *crypto, 3248 enum nl80211_iftype iftype) 3249 { 3250 const struct ieee80211_cipher_scheme *cs; 3251 int headroom = IEEE80211_ENCRYPT_HEADROOM; 3252 int i; 3253 3254 for (i = 0; i < crypto->n_ciphers_pairwise; i++) { 3255 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i], 3256 iftype); 3257 3258 if (cs && headroom < cs->hdr_len) 3259 headroom = cs->hdr_len; 3260 } 3261 3262 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype); 3263 if (cs && headroom < cs->hdr_len) 3264 headroom = cs->hdr_len; 3265 3266 return headroom; 3267 } 3268 3269 static bool 3270 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3271 { 3272 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3273 int skip; 3274 3275 if (end > 0) 3276 return false; 3277 3278 /* One shot NOA */ 3279 if (data->count[i] == 1) 3280 return false; 3281 3282 if (data->desc[i].interval == 0) 3283 return false; 3284 3285 /* End time is in the past, check for repetitions */ 3286 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3287 if (data->count[i] < 255) { 3288 if (data->count[i] <= skip) { 3289 data->count[i] = 0; 3290 return false; 3291 } 3292 3293 data->count[i] -= skip; 3294 } 3295 3296 data->desc[i].start += skip * data->desc[i].interval; 3297 3298 return true; 3299 } 3300 3301 static bool 3302 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3303 s32 *offset) 3304 { 3305 bool ret = false; 3306 int i; 3307 3308 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3309 s32 cur; 3310 3311 if (!data->count[i]) 3312 continue; 3313 3314 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3315 ret = true; 3316 3317 cur = data->desc[i].start - tsf; 3318 if (cur > *offset) 3319 continue; 3320 3321 cur = data->desc[i].start + data->desc[i].duration - tsf; 3322 if (cur > *offset) 3323 *offset = cur; 3324 } 3325 3326 return ret; 3327 } 3328 3329 static u32 3330 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3331 { 3332 s32 offset = 0; 3333 int tries = 0; 3334 /* 3335 * arbitrary limit, used to avoid infinite loops when combined NoA 3336 * descriptors cover the full time period. 3337 */ 3338 int max_tries = 5; 3339 3340 ieee80211_extend_absent_time(data, tsf, &offset); 3341 do { 3342 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 3343 break; 3344 3345 tries++; 3346 } while (tries < max_tries); 3347 3348 return offset; 3349 } 3350 3351 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 3352 { 3353 u32 next_offset = BIT(31) - 1; 3354 int i; 3355 3356 data->absent = 0; 3357 data->has_next_tsf = false; 3358 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3359 s32 start; 3360 3361 if (!data->count[i]) 3362 continue; 3363 3364 ieee80211_extend_noa_desc(data, tsf, i); 3365 start = data->desc[i].start - tsf; 3366 if (start <= 0) 3367 data->absent |= BIT(i); 3368 3369 if (next_offset > start) 3370 next_offset = start; 3371 3372 data->has_next_tsf = true; 3373 } 3374 3375 if (data->absent) 3376 next_offset = ieee80211_get_noa_absent_time(data, tsf); 3377 3378 data->next_tsf = tsf + next_offset; 3379 } 3380 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 3381 3382 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 3383 struct ieee80211_noa_data *data, u32 tsf) 3384 { 3385 int ret = 0; 3386 int i; 3387 3388 memset(data, 0, sizeof(*data)); 3389 3390 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3391 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 3392 3393 if (!desc->count || !desc->duration) 3394 continue; 3395 3396 data->count[i] = desc->count; 3397 data->desc[i].start = le32_to_cpu(desc->start_time); 3398 data->desc[i].duration = le32_to_cpu(desc->duration); 3399 data->desc[i].interval = le32_to_cpu(desc->interval); 3400 3401 if (data->count[i] > 1 && 3402 data->desc[i].interval < data->desc[i].duration) 3403 continue; 3404 3405 ieee80211_extend_noa_desc(data, tsf, i); 3406 ret++; 3407 } 3408 3409 if (ret) 3410 ieee80211_update_p2p_noa(data, tsf); 3411 3412 return ret; 3413 } 3414 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 3415 3416 void ieee80211_recalc_dtim(struct ieee80211_local *local, 3417 struct ieee80211_sub_if_data *sdata) 3418 { 3419 u64 tsf = drv_get_tsf(local, sdata); 3420 u64 dtim_count = 0; 3421 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 3422 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 3423 struct ps_data *ps; 3424 u8 bcns_from_dtim; 3425 3426 if (tsf == -1ULL || !beacon_int || !dtim_period) 3427 return; 3428 3429 if (sdata->vif.type == NL80211_IFTYPE_AP || 3430 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 3431 if (!sdata->bss) 3432 return; 3433 3434 ps = &sdata->bss->ps; 3435 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 3436 ps = &sdata->u.mesh.ps; 3437 } else { 3438 return; 3439 } 3440 3441 /* 3442 * actually finds last dtim_count, mac80211 will update in 3443 * __beacon_add_tim(). 3444 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 3445 */ 3446 do_div(tsf, beacon_int); 3447 bcns_from_dtim = do_div(tsf, dtim_period); 3448 /* just had a DTIM */ 3449 if (!bcns_from_dtim) 3450 dtim_count = 0; 3451 else 3452 dtim_count = dtim_period - bcns_from_dtim; 3453 3454 ps->dtim_count = dtim_count; 3455 } 3456 3457 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 3458 struct ieee80211_chanctx *ctx) 3459 { 3460 struct ieee80211_sub_if_data *sdata; 3461 u8 radar_detect = 0; 3462 3463 lockdep_assert_held(&local->chanctx_mtx); 3464 3465 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 3466 return 0; 3467 3468 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) 3469 if (sdata->reserved_radar_required) 3470 radar_detect |= BIT(sdata->reserved_chandef.width); 3471 3472 /* 3473 * An in-place reservation context should not have any assigned vifs 3474 * until it replaces the other context. 3475 */ 3476 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && 3477 !list_empty(&ctx->assigned_vifs)); 3478 3479 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) 3480 if (sdata->radar_required) 3481 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width); 3482 3483 return radar_detect; 3484 } 3485 3486 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 3487 const struct cfg80211_chan_def *chandef, 3488 enum ieee80211_chanctx_mode chanmode, 3489 u8 radar_detect) 3490 { 3491 struct ieee80211_local *local = sdata->local; 3492 struct ieee80211_sub_if_data *sdata_iter; 3493 enum nl80211_iftype iftype = sdata->wdev.iftype; 3494 struct ieee80211_chanctx *ctx; 3495 int total = 1; 3496 struct iface_combination_params params = { 3497 .radar_detect = radar_detect, 3498 }; 3499 3500 lockdep_assert_held(&local->chanctx_mtx); 3501 3502 if (WARN_ON(hweight32(radar_detect) > 1)) 3503 return -EINVAL; 3504 3505 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3506 !chandef->chan)) 3507 return -EINVAL; 3508 3509 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 3510 return -EINVAL; 3511 3512 if (sdata->vif.type == NL80211_IFTYPE_AP || 3513 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 3514 /* 3515 * always passing this is harmless, since it'll be the 3516 * same value that cfg80211 finds if it finds the same 3517 * interface ... and that's always allowed 3518 */ 3519 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 3520 } 3521 3522 /* Always allow software iftypes */ 3523 if (local->hw.wiphy->software_iftypes & BIT(iftype)) { 3524 if (radar_detect) 3525 return -EINVAL; 3526 return 0; 3527 } 3528 3529 if (chandef) 3530 params.num_different_channels = 1; 3531 3532 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 3533 params.iftype_num[iftype] = 1; 3534 3535 list_for_each_entry(ctx, &local->chanctx_list, list) { 3536 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3537 continue; 3538 params.radar_detect |= 3539 ieee80211_chanctx_radar_detect(local, ctx); 3540 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) { 3541 params.num_different_channels++; 3542 continue; 3543 } 3544 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED && 3545 cfg80211_chandef_compatible(chandef, 3546 &ctx->conf.def)) 3547 continue; 3548 params.num_different_channels++; 3549 } 3550 3551 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) { 3552 struct wireless_dev *wdev_iter; 3553 3554 wdev_iter = &sdata_iter->wdev; 3555 3556 if (sdata_iter == sdata || 3557 !ieee80211_sdata_running(sdata_iter) || 3558 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype)) 3559 continue; 3560 3561 params.iftype_num[wdev_iter->iftype]++; 3562 total++; 3563 } 3564 3565 if (total == 1 && !params.radar_detect) 3566 return 0; 3567 3568 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 3569 } 3570 3571 static void 3572 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 3573 void *data) 3574 { 3575 u32 *max_num_different_channels = data; 3576 3577 *max_num_different_channels = max(*max_num_different_channels, 3578 c->num_different_channels); 3579 } 3580 3581 int ieee80211_max_num_channels(struct ieee80211_local *local) 3582 { 3583 struct ieee80211_sub_if_data *sdata; 3584 struct ieee80211_chanctx *ctx; 3585 u32 max_num_different_channels = 1; 3586 int err; 3587 struct iface_combination_params params = {0}; 3588 3589 lockdep_assert_held(&local->chanctx_mtx); 3590 3591 list_for_each_entry(ctx, &local->chanctx_list, list) { 3592 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 3593 continue; 3594 3595 params.num_different_channels++; 3596 3597 params.radar_detect |= 3598 ieee80211_chanctx_radar_detect(local, ctx); 3599 } 3600 3601 list_for_each_entry_rcu(sdata, &local->interfaces, list) 3602 params.iftype_num[sdata->wdev.iftype]++; 3603 3604 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 3605 ieee80211_iter_max_chans, 3606 &max_num_different_channels); 3607 if (err < 0) 3608 return err; 3609 3610 return max_num_different_channels; 3611 } 3612 3613 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 3614 { 3615 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 3616 *buf++ = 7; /* len */ 3617 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 3618 *buf++ = 0x50; 3619 *buf++ = 0xf2; 3620 *buf++ = 2; /* WME */ 3621 *buf++ = 0; /* WME info */ 3622 *buf++ = 1; /* WME ver */ 3623 *buf++ = qosinfo; /* U-APSD no in use */ 3624 3625 return buf; 3626 } 3627 3628 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 3629 unsigned long *frame_cnt, 3630 unsigned long *byte_cnt) 3631 { 3632 struct txq_info *txqi = to_txq_info(txq); 3633 u32 frag_cnt = 0, frag_bytes = 0; 3634 struct sk_buff *skb; 3635 3636 skb_queue_walk(&txqi->frags, skb) { 3637 frag_cnt++; 3638 frag_bytes += skb->len; 3639 } 3640 3641 if (frame_cnt) 3642 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 3643 3644 if (byte_cnt) 3645 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 3646 } 3647 EXPORT_SYMBOL(ieee80211_txq_get_depth); 3648 3649 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 3650 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 3651 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 3652 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 3653 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 3654 }; 3655