1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> 7 * Copyright 2013-2014 Intel Mobile Communications GmbH 8 * Copyright (C) 2015-2017 Intel Deutschland GmbH 9 * Copyright (C) 2018-2026 Intel Corporation 10 * 11 * utilities for mac80211 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/netdevice.h> 16 #include <linux/export.h> 17 #include <linux/types.h> 18 #include <linux/slab.h> 19 #include <linux/skbuff.h> 20 #include <linux/etherdevice.h> 21 #include <linux/if_arp.h> 22 #include <linux/bitmap.h> 23 #include <linux/crc32.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/rtnetlink.h> 27 #include <kunit/visibility.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wme.h" 34 #include "led.h" 35 #include "wep.h" 36 37 /* privid for wiphys to determine whether they belong to us or not */ 38 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid; 39 40 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy) 41 { 42 struct ieee80211_local *local; 43 44 local = wiphy_priv(wiphy); 45 return &local->hw; 46 } 47 EXPORT_SYMBOL(wiphy_to_ieee80211_hw); 48 49 const struct ieee80211_conn_settings ieee80211_conn_settings_unlimited = { 50 .mode = IEEE80211_CONN_MODE_HIGHEST, 51 .bw_limit = IEEE80211_CONN_BW_LIMIT_320, 52 }; 53 54 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len, 55 enum nl80211_iftype type) 56 { 57 __le16 fc = hdr->frame_control; 58 59 if (ieee80211_is_data(fc)) { 60 if (len < 24) /* drop incorrect hdr len (data) */ 61 return NULL; 62 63 if (ieee80211_has_a4(fc)) 64 return NULL; 65 if (ieee80211_has_tods(fc)) 66 return hdr->addr1; 67 if (ieee80211_has_fromds(fc)) 68 return hdr->addr2; 69 70 return hdr->addr3; 71 } 72 73 if (ieee80211_is_s1g_beacon(fc)) { 74 struct ieee80211_ext *ext = (void *) hdr; 75 76 if (len < offsetofend(struct ieee80211_ext, u.s1g_beacon.sa)) 77 return NULL; 78 79 return ext->u.s1g_beacon.sa; 80 } 81 82 if (ieee80211_is_mgmt(fc)) { 83 if (len < 24) /* drop incorrect hdr len (mgmt) */ 84 return NULL; 85 return hdr->addr3; 86 } 87 88 if (ieee80211_is_ctl(fc)) { 89 if (ieee80211_is_pspoll(fc)) 90 return hdr->addr1; 91 92 if (ieee80211_is_back_req(fc)) { 93 switch (type) { 94 case NL80211_IFTYPE_STATION: 95 return hdr->addr2; 96 case NL80211_IFTYPE_AP: 97 case NL80211_IFTYPE_AP_VLAN: 98 return hdr->addr1; 99 default: 100 break; /* fall through to the return */ 101 } 102 } 103 } 104 105 return NULL; 106 } 107 108 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 109 { 110 struct sk_buff *skb; 111 struct ieee80211_hdr *hdr; 112 113 skb_queue_walk(&tx->skbs, skb) { 114 hdr = (struct ieee80211_hdr *) skb->data; 115 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 116 } 117 } 118 119 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 120 int rate, int erp, int short_preamble) 121 { 122 int dur; 123 124 /* calculate duration (in microseconds, rounded up to next higher 125 * integer if it includes a fractional microsecond) to send frame of 126 * len bytes (does not include FCS) at the given rate. Duration will 127 * also include SIFS. 128 * 129 * rate is in 100 kbps, so divident is multiplied by 10 in the 130 * DIV_ROUND_UP() operations. 131 */ 132 133 if (band == NL80211_BAND_5GHZ || erp) { 134 /* 135 * OFDM: 136 * 137 * N_DBPS = DATARATE x 4 138 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 139 * (16 = SIGNAL time, 6 = tail bits) 140 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 141 * 142 * T_SYM = 4 usec 143 * 802.11a - 18.5.2: aSIFSTime = 16 usec 144 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 145 * signal ext = 6 usec 146 */ 147 dur = 16; /* SIFS + signal ext */ 148 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 149 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 150 151 /* rates should already consider the channel bandwidth, 152 * don't apply divisor again. 153 */ 154 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 155 4 * rate); /* T_SYM x N_SYM */ 156 } else { 157 /* 158 * 802.11b or 802.11g with 802.11b compatibility: 159 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 160 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 161 * 162 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 163 * aSIFSTime = 10 usec 164 * aPreambleLength = 144 usec or 72 usec with short preamble 165 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 166 */ 167 dur = 10; /* aSIFSTime = 10 usec */ 168 dur += short_preamble ? (72 + 24) : (144 + 48); 169 170 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 171 } 172 173 return dur; 174 } 175 176 /* Exported duration function for driver use */ 177 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 178 struct ieee80211_vif *vif, 179 enum nl80211_band band, 180 size_t frame_len, 181 struct ieee80211_rate *rate) 182 { 183 struct ieee80211_sub_if_data *sdata; 184 u16 dur; 185 int erp; 186 bool short_preamble = false; 187 188 erp = 0; 189 if (vif) { 190 sdata = vif_to_sdata(vif); 191 short_preamble = sdata->vif.bss_conf.use_short_preamble; 192 if (sdata->deflink.operating_11g_mode) 193 erp = rate->flags & IEEE80211_RATE_ERP_G; 194 } 195 196 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 197 short_preamble); 198 199 return cpu_to_le16(dur); 200 } 201 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 202 203 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 204 struct ieee80211_vif *vif, size_t frame_len, 205 const struct ieee80211_tx_info *frame_txctl) 206 { 207 struct ieee80211_local *local = hw_to_local(hw); 208 struct ieee80211_rate *rate; 209 struct ieee80211_sub_if_data *sdata; 210 bool short_preamble; 211 int erp, bitrate; 212 u16 dur; 213 struct ieee80211_supported_band *sband; 214 215 sband = local->hw.wiphy->bands[frame_txctl->band]; 216 217 short_preamble = false; 218 219 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 220 221 erp = 0; 222 if (vif) { 223 sdata = vif_to_sdata(vif); 224 short_preamble = sdata->vif.bss_conf.use_short_preamble; 225 if (sdata->deflink.operating_11g_mode) 226 erp = rate->flags & IEEE80211_RATE_ERP_G; 227 } 228 229 bitrate = rate->bitrate; 230 231 /* CTS duration */ 232 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 233 erp, short_preamble); 234 /* Data frame duration */ 235 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 236 erp, short_preamble); 237 /* ACK duration */ 238 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 239 erp, short_preamble); 240 241 return cpu_to_le16(dur); 242 } 243 EXPORT_SYMBOL(ieee80211_rts_duration); 244 245 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 246 struct ieee80211_vif *vif, 247 size_t frame_len, 248 const struct ieee80211_tx_info *frame_txctl) 249 { 250 struct ieee80211_local *local = hw_to_local(hw); 251 struct ieee80211_rate *rate; 252 struct ieee80211_sub_if_data *sdata; 253 bool short_preamble; 254 int erp, bitrate; 255 u16 dur; 256 struct ieee80211_supported_band *sband; 257 258 sband = local->hw.wiphy->bands[frame_txctl->band]; 259 260 short_preamble = false; 261 262 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 263 erp = 0; 264 if (vif) { 265 sdata = vif_to_sdata(vif); 266 short_preamble = sdata->vif.bss_conf.use_short_preamble; 267 if (sdata->deflink.operating_11g_mode) 268 erp = rate->flags & IEEE80211_RATE_ERP_G; 269 } 270 271 bitrate = rate->bitrate; 272 273 /* Data frame duration */ 274 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 275 erp, short_preamble); 276 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 277 /* ACK duration */ 278 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 279 erp, short_preamble); 280 } 281 282 return cpu_to_le16(dur); 283 } 284 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 285 286 static void wake_tx_push_queue(struct ieee80211_local *local, 287 struct ieee80211_sub_if_data *sdata, 288 struct ieee80211_txq *queue) 289 { 290 struct ieee80211_tx_control control = { 291 .sta = queue->sta, 292 }; 293 struct sk_buff *skb; 294 295 while (1) { 296 skb = ieee80211_tx_dequeue(&local->hw, queue); 297 if (!skb) 298 break; 299 300 drv_tx(local, &control, skb); 301 } 302 } 303 304 /* wake_tx_queue handler for driver not implementing a custom one*/ 305 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw, 306 struct ieee80211_txq *txq) 307 { 308 struct ieee80211_local *local = hw_to_local(hw); 309 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif); 310 struct ieee80211_txq *queue; 311 312 spin_lock(&local->handle_wake_tx_queue_lock); 313 314 /* Use ieee80211_next_txq() for airtime fairness accounting */ 315 ieee80211_txq_schedule_start(hw, txq->ac); 316 while ((queue = ieee80211_next_txq(hw, txq->ac))) { 317 wake_tx_push_queue(local, sdata, queue); 318 ieee80211_return_txq(hw, queue, false); 319 } 320 ieee80211_txq_schedule_end(hw, txq->ac); 321 spin_unlock(&local->handle_wake_tx_queue_lock); 322 } 323 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue); 324 325 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 326 { 327 struct ieee80211_local *local = sdata->local; 328 struct ieee80211_vif *vif = &sdata->vif; 329 struct fq *fq = &local->fq; 330 struct ps_data *ps = NULL; 331 struct txq_info *txqi = NULL; 332 struct sta_info *sta; 333 int i; 334 335 local_bh_disable(); 336 spin_lock(&fq->lock); 337 338 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state)) 339 goto out; 340 341 if (sdata->vif.type == NL80211_IFTYPE_AP) 342 ps = &sdata->bss->ps; 343 344 list_for_each_entry_rcu(sta, &local->sta_list, list) { 345 if (sdata != sta->sdata) 346 continue; 347 348 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 349 struct ieee80211_txq *txq = sta->sta.txq[i]; 350 struct txq_info *sta_txqi; 351 352 if (!txq) 353 continue; 354 355 sta_txqi = to_txq_info(txq); 356 357 if (ac != txq->ac) 358 continue; 359 360 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, 361 &sta_txqi->flags)) 362 continue; 363 364 spin_unlock(&fq->lock); 365 drv_wake_tx_queue(local, sta_txqi); 366 spin_lock(&fq->lock); 367 } 368 } 369 370 if (vif->txq) { 371 txqi = to_txq_info(vif->txq); 372 373 /* txq and txq_mgmt are mutually exclusive */ 374 WARN_ON_ONCE(vif->txq_mgmt); 375 376 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) || 377 (ps && atomic_read(&ps->num_sta_ps)) || 378 ac != vif->txq->ac) 379 txqi = NULL; 380 } else if (vif->txq_mgmt) { 381 txqi = to_txq_info(vif->txq_mgmt); 382 383 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) || 384 ac != vif->txq_mgmt->ac) 385 txqi = NULL; 386 } 387 388 spin_unlock(&fq->lock); 389 390 if (txqi) 391 drv_wake_tx_queue(local, txqi); 392 393 local_bh_enable(); 394 return; 395 out: 396 spin_unlock(&fq->lock); 397 local_bh_enable(); 398 } 399 400 static void 401 __releases(&local->queue_stop_reason_lock) 402 __acquires(&local->queue_stop_reason_lock) 403 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 404 { 405 struct ieee80211_sub_if_data *sdata; 406 int n_acs = IEEE80211_NUM_ACS; 407 int i; 408 409 rcu_read_lock(); 410 411 if (local->hw.queues < IEEE80211_NUM_ACS) 412 n_acs = 1; 413 414 for (i = 0; i < local->hw.queues; i++) { 415 if (local->queue_stop_reasons[i]) 416 continue; 417 418 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 419 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 420 int ac; 421 422 for (ac = 0; ac < n_acs; ac++) { 423 int ac_queue = sdata->vif.hw_queue[ac]; 424 425 if (ac_queue == i || 426 sdata->vif.cab_queue == i) 427 __ieee80211_wake_txqs(sdata, ac); 428 } 429 } 430 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 431 } 432 433 rcu_read_unlock(); 434 } 435 436 void ieee80211_wake_txqs(struct tasklet_struct *t) 437 { 438 struct ieee80211_local *local = from_tasklet(local, t, 439 wake_txqs_tasklet); 440 unsigned long flags; 441 442 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 443 _ieee80211_wake_txqs(local, &flags); 444 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 445 } 446 447 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 448 enum queue_stop_reason reason, 449 bool refcounted, 450 unsigned long *flags) 451 { 452 struct ieee80211_local *local = hw_to_local(hw); 453 454 if (WARN_ON(queue >= hw->queues)) 455 return; 456 457 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 458 return; 459 460 if (!refcounted) { 461 local->q_stop_reasons[queue][reason] = 0; 462 } else { 463 local->q_stop_reasons[queue][reason]--; 464 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 465 local->q_stop_reasons[queue][reason] = 0; 466 } 467 468 if (local->q_stop_reasons[queue][reason] == 0) 469 __clear_bit(reason, &local->queue_stop_reasons[queue]); 470 471 trace_wake_queue(local, queue, reason, 472 local->q_stop_reasons[queue][reason]); 473 474 if (local->queue_stop_reasons[queue] != 0) 475 /* someone still has this queue stopped */ 476 return; 477 478 if (!skb_queue_empty(&local->pending[queue])) 479 tasklet_schedule(&local->tx_pending_tasklet); 480 481 /* 482 * Calling _ieee80211_wake_txqs here can be a problem because it may 483 * release queue_stop_reason_lock which has been taken by 484 * __ieee80211_wake_queue's caller. It is certainly not very nice to 485 * release someone's lock, but it is fine because all the callers of 486 * __ieee80211_wake_queue call it right before releasing the lock. 487 */ 488 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 489 tasklet_schedule(&local->wake_txqs_tasklet); 490 else 491 _ieee80211_wake_txqs(local, flags); 492 } 493 494 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 495 enum queue_stop_reason reason, 496 bool refcounted) 497 { 498 struct ieee80211_local *local = hw_to_local(hw); 499 unsigned long flags; 500 501 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 502 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 503 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 504 } 505 506 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 507 { 508 ieee80211_wake_queue_by_reason(hw, queue, 509 IEEE80211_QUEUE_STOP_REASON_DRIVER, 510 false); 511 } 512 EXPORT_SYMBOL(ieee80211_wake_queue); 513 514 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 515 enum queue_stop_reason reason, 516 bool refcounted) 517 { 518 struct ieee80211_local *local = hw_to_local(hw); 519 520 if (WARN_ON(queue >= hw->queues)) 521 return; 522 523 if (!refcounted) 524 local->q_stop_reasons[queue][reason] = 1; 525 else 526 local->q_stop_reasons[queue][reason]++; 527 528 trace_stop_queue(local, queue, reason, 529 local->q_stop_reasons[queue][reason]); 530 531 set_bit(reason, &local->queue_stop_reasons[queue]); 532 } 533 534 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 535 enum queue_stop_reason reason, 536 bool refcounted) 537 { 538 struct ieee80211_local *local = hw_to_local(hw); 539 unsigned long flags; 540 541 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 542 __ieee80211_stop_queue(hw, queue, reason, refcounted); 543 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 544 } 545 546 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 547 { 548 ieee80211_stop_queue_by_reason(hw, queue, 549 IEEE80211_QUEUE_STOP_REASON_DRIVER, 550 false); 551 } 552 EXPORT_SYMBOL(ieee80211_stop_queue); 553 554 void ieee80211_add_pending_skb(struct ieee80211_local *local, 555 struct sk_buff *skb) 556 { 557 struct ieee80211_hw *hw = &local->hw; 558 unsigned long flags; 559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 560 int queue = info->hw_queue; 561 562 if (WARN_ON(!info->control.vif)) { 563 ieee80211_free_txskb(&local->hw, skb); 564 return; 565 } 566 567 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 568 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 569 false); 570 __skb_queue_tail(&local->pending[queue], skb); 571 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 572 false, &flags); 573 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 574 } 575 576 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 577 struct sk_buff_head *skbs) 578 { 579 struct ieee80211_hw *hw = &local->hw; 580 struct sk_buff *skb; 581 unsigned long flags; 582 int queue, i; 583 584 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 585 while ((skb = skb_dequeue(skbs))) { 586 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 587 588 if (WARN_ON(!info->control.vif)) { 589 ieee80211_free_txskb(&local->hw, skb); 590 continue; 591 } 592 593 queue = info->hw_queue; 594 595 __ieee80211_stop_queue(hw, queue, 596 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 597 false); 598 599 __skb_queue_tail(&local->pending[queue], skb); 600 } 601 602 for (i = 0; i < hw->queues; i++) 603 __ieee80211_wake_queue(hw, i, 604 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 605 false, &flags); 606 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 607 } 608 609 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 610 unsigned long queues, 611 enum queue_stop_reason reason, 612 bool refcounted) 613 { 614 struct ieee80211_local *local = hw_to_local(hw); 615 unsigned long flags; 616 int i; 617 618 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 619 620 for_each_set_bit(i, &queues, hw->queues) 621 __ieee80211_stop_queue(hw, i, reason, refcounted); 622 623 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 624 } 625 626 void ieee80211_stop_queues(struct ieee80211_hw *hw) 627 { 628 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 629 IEEE80211_QUEUE_STOP_REASON_DRIVER, 630 false); 631 } 632 EXPORT_SYMBOL(ieee80211_stop_queues); 633 634 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 635 { 636 struct ieee80211_local *local = hw_to_local(hw); 637 unsigned long flags; 638 int ret; 639 640 if (WARN_ON(queue >= hw->queues)) 641 return true; 642 643 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 644 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 645 &local->queue_stop_reasons[queue]); 646 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 647 return ret; 648 } 649 EXPORT_SYMBOL(ieee80211_queue_stopped); 650 651 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 652 unsigned long queues, 653 enum queue_stop_reason reason, 654 bool refcounted) 655 { 656 struct ieee80211_local *local = hw_to_local(hw); 657 unsigned long flags; 658 int i; 659 660 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 661 662 for_each_set_bit(i, &queues, hw->queues) 663 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 664 665 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 666 } 667 668 void ieee80211_wake_queues(struct ieee80211_hw *hw) 669 { 670 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 671 IEEE80211_QUEUE_STOP_REASON_DRIVER, 672 false); 673 } 674 EXPORT_SYMBOL(ieee80211_wake_queues); 675 676 unsigned int 677 ieee80211_get_vif_queues(struct ieee80211_local *local, 678 struct ieee80211_sub_if_data *sdata) 679 { 680 unsigned int queues; 681 682 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 683 int ac; 684 685 queues = 0; 686 687 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 688 if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 689 queues |= BIT(sdata->vif.hw_queue[ac]); 690 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 691 queues |= BIT(sdata->vif.cab_queue); 692 } else { 693 /* all queues */ 694 queues = BIT(local->hw.queues) - 1; 695 } 696 697 return queues; 698 } 699 700 void __ieee80211_flush_queues(struct ieee80211_local *local, 701 struct ieee80211_sub_if_data *sdata, 702 unsigned int queues, bool drop) 703 { 704 if (!local->ops->flush && !drop) 705 return; 706 707 /* 708 * If no queue was set, or if the HW doesn't support 709 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 710 */ 711 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 712 queues = ieee80211_get_vif_queues(local, sdata); 713 714 ieee80211_stop_queues_by_reason(&local->hw, queues, 715 IEEE80211_QUEUE_STOP_REASON_FLUSH, 716 false); 717 718 if (drop) { 719 struct sta_info *sta; 720 721 /* Purge the queues, so the frames on them won't be 722 * sent during __ieee80211_wake_queue() 723 */ 724 list_for_each_entry(sta, &local->sta_list, list) { 725 if (sdata != sta->sdata) 726 continue; 727 ieee80211_purge_sta_txqs(sta); 728 } 729 } 730 731 if (local->ops->flush) 732 drv_flush(local, sdata, queues, drop); 733 734 ieee80211_wake_queues_by_reason(&local->hw, queues, 735 IEEE80211_QUEUE_STOP_REASON_FLUSH, 736 false); 737 } 738 739 void ieee80211_flush_queues(struct ieee80211_local *local, 740 struct ieee80211_sub_if_data *sdata, bool drop) 741 { 742 __ieee80211_flush_queues(local, sdata, 0, drop); 743 } 744 745 static void __iterate_interfaces(struct ieee80211_local *local, 746 u32 iter_flags, 747 void (*iterator)(void *data, u8 *mac, 748 struct ieee80211_vif *vif), 749 void *data) 750 { 751 struct ieee80211_sub_if_data *sdata; 752 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 753 754 list_for_each_entry_rcu(sdata, &local->interfaces, list, 755 lockdep_is_held(&local->iflist_mtx) || 756 lockdep_is_held(&local->hw.wiphy->mtx)) { 757 switch (sdata->vif.type) { 758 case NL80211_IFTYPE_MONITOR: 759 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 760 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 761 continue; 762 break; 763 case NL80211_IFTYPE_AP_VLAN: 764 continue; 765 default: 766 break; 767 } 768 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 769 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 770 continue; 771 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 772 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 773 continue; 774 if (ieee80211_sdata_running(sdata) || !active_only) 775 iterator(data, sdata->vif.addr, 776 &sdata->vif); 777 } 778 779 sdata = rcu_dereference_check(local->monitor_sdata, 780 lockdep_is_held(&local->iflist_mtx) || 781 lockdep_is_held(&local->hw.wiphy->mtx)); 782 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) && 783 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 784 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 785 iterator(data, sdata->vif.addr, &sdata->vif); 786 } 787 788 void ieee80211_iterate_interfaces( 789 struct ieee80211_hw *hw, u32 iter_flags, 790 void (*iterator)(void *data, u8 *mac, 791 struct ieee80211_vif *vif), 792 void *data) 793 { 794 struct ieee80211_local *local = hw_to_local(hw); 795 796 mutex_lock(&local->iflist_mtx); 797 __iterate_interfaces(local, iter_flags, iterator, data); 798 mutex_unlock(&local->iflist_mtx); 799 } 800 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 801 802 void ieee80211_iterate_active_interfaces_atomic( 803 struct ieee80211_hw *hw, u32 iter_flags, 804 void (*iterator)(void *data, u8 *mac, 805 struct ieee80211_vif *vif), 806 void *data) 807 { 808 struct ieee80211_local *local = hw_to_local(hw); 809 810 rcu_read_lock(); 811 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 812 iterator, data); 813 rcu_read_unlock(); 814 } 815 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 816 817 struct ieee80211_vif * 818 __ieee80211_iterate_interfaces(struct ieee80211_hw *hw, 819 struct ieee80211_vif *prev, 820 u32 iter_flags) 821 { 822 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 823 struct ieee80211_sub_if_data *sdata = NULL, *monitor; 824 struct ieee80211_local *local = hw_to_local(hw); 825 826 lockdep_assert_wiphy(hw->wiphy); 827 828 if (prev) 829 sdata = vif_to_sdata(prev); 830 831 monitor = rcu_dereference_check(local->monitor_sdata, 832 lockdep_is_held(&hw->wiphy->mtx)); 833 if (monitor && monitor == sdata) 834 return NULL; 835 836 sdata = list_prepare_entry(sdata, &local->interfaces, list); 837 list_for_each_entry_continue(sdata, &local->interfaces, list) { 838 switch (sdata->vif.type) { 839 case NL80211_IFTYPE_MONITOR: 840 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 841 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 842 continue; 843 break; 844 case NL80211_IFTYPE_AP_VLAN: 845 continue; 846 default: 847 break; 848 } 849 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 850 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 851 continue; 852 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 853 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 854 continue; 855 if (ieee80211_sdata_running(sdata) || !active_only) 856 return &sdata->vif; 857 } 858 859 if (monitor && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) && 860 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 861 monitor->flags & IEEE80211_SDATA_IN_DRIVER)) 862 return &monitor->vif; 863 864 return NULL; 865 } 866 EXPORT_SYMBOL_GPL(__ieee80211_iterate_interfaces); 867 868 static void __iterate_stations(struct ieee80211_local *local, 869 void (*iterator)(void *data, 870 struct ieee80211_sta *sta), 871 void *data) 872 { 873 struct sta_info *sta; 874 875 list_for_each_entry_rcu(sta, &local->sta_list, list, 876 lockdep_is_held(&local->hw.wiphy->mtx)) { 877 if (!sta->uploaded) 878 continue; 879 880 iterator(data, &sta->sta); 881 } 882 } 883 884 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 885 void (*iterator)(void *data, 886 struct ieee80211_sta *sta), 887 void *data) 888 { 889 struct ieee80211_local *local = hw_to_local(hw); 890 891 rcu_read_lock(); 892 __iterate_stations(local, iterator, data); 893 rcu_read_unlock(); 894 } 895 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 896 897 struct ieee80211_sta * 898 __ieee80211_iterate_stations(struct ieee80211_hw *hw, 899 struct ieee80211_sta *prev) 900 { 901 struct ieee80211_local *local = hw_to_local(hw); 902 struct sta_info *sta = NULL; 903 904 lockdep_assert_wiphy(local->hw.wiphy); 905 906 if (prev) 907 sta = container_of(prev, struct sta_info, sta); 908 909 sta = list_prepare_entry(sta, &local->sta_list, list); 910 list_for_each_entry_continue(sta, &local->sta_list, list) { 911 if (!sta->uploaded) 912 continue; 913 914 return &sta->sta; 915 } 916 917 return NULL; 918 } 919 EXPORT_SYMBOL_GPL(__ieee80211_iterate_stations); 920 921 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 922 { 923 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 924 925 if (!ieee80211_sdata_running(sdata) || 926 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 927 return NULL; 928 return &sdata->vif; 929 } 930 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 931 932 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 933 { 934 if (!vif) 935 return NULL; 936 937 return &vif_to_sdata(vif)->wdev; 938 } 939 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 940 941 /* 942 * Nothing should have been stuffed into the workqueue during 943 * the suspend->resume cycle. Since we can't check each caller 944 * of this function if we are already quiescing / suspended, 945 * check here and don't WARN since this can actually happen when 946 * the rx path (for example) is racing against __ieee80211_suspend 947 * and suspending / quiescing was set after the rx path checked 948 * them. 949 */ 950 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 951 { 952 if (local->quiescing || (local->suspended && !local->resuming)) { 953 pr_warn("queueing ieee80211 work while going to suspend\n"); 954 return false; 955 } 956 957 return true; 958 } 959 960 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 961 { 962 struct ieee80211_local *local = hw_to_local(hw); 963 964 if (!ieee80211_can_queue_work(local)) 965 return; 966 967 queue_work(local->workqueue, work); 968 } 969 EXPORT_SYMBOL(ieee80211_queue_work); 970 971 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 972 struct delayed_work *dwork, 973 unsigned long delay) 974 { 975 struct ieee80211_local *local = hw_to_local(hw); 976 977 if (!ieee80211_can_queue_work(local)) 978 return; 979 980 queue_delayed_work(local->workqueue, dwork, delay); 981 } 982 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 983 984 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 985 struct ieee80211_tx_queue_params 986 *qparam, int ac) 987 { 988 struct ieee80211_chanctx_conf *chanctx_conf; 989 const struct ieee80211_reg_rule *rrule; 990 const struct ieee80211_wmm_ac *wmm_ac; 991 u16 center_freq = 0; 992 993 if (sdata->vif.type != NL80211_IFTYPE_AP && 994 sdata->vif.type != NL80211_IFTYPE_STATION) 995 return; 996 997 rcu_read_lock(); 998 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 999 if (chanctx_conf) 1000 center_freq = chanctx_conf->def.chan->center_freq; 1001 1002 if (!center_freq) { 1003 rcu_read_unlock(); 1004 return; 1005 } 1006 1007 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1008 1009 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1010 rcu_read_unlock(); 1011 return; 1012 } 1013 1014 if (sdata->vif.type == NL80211_IFTYPE_AP) 1015 wmm_ac = &rrule->wmm_rule.ap[ac]; 1016 else 1017 wmm_ac = &rrule->wmm_rule.client[ac]; 1018 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1019 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1020 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1021 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1022 rcu_read_unlock(); 1023 } 1024 1025 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1026 bool bss_notify, bool enable_qos) 1027 { 1028 struct ieee80211_sub_if_data *sdata = link->sdata; 1029 struct ieee80211_local *local = sdata->local; 1030 struct ieee80211_tx_queue_params qparam; 1031 struct ieee80211_chanctx_conf *chanctx_conf; 1032 int ac; 1033 bool use_11b; 1034 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1035 int aCWmin, aCWmax; 1036 1037 if (!local->ops->conf_tx) 1038 return; 1039 1040 if (local->hw.queues < IEEE80211_NUM_ACS) 1041 return; 1042 1043 memset(&qparam, 0, sizeof(qparam)); 1044 1045 rcu_read_lock(); 1046 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1047 use_11b = (chanctx_conf && 1048 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1049 !link->operating_11g_mode; 1050 rcu_read_unlock(); 1051 1052 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1053 1054 /* Set defaults according to 802.11-2007 Table 7-37 */ 1055 aCWmax = 1023; 1056 if (use_11b) 1057 aCWmin = 31; 1058 else 1059 aCWmin = 15; 1060 1061 /* Configure old 802.11b/g medium access rules. */ 1062 qparam.cw_max = aCWmax; 1063 qparam.cw_min = aCWmin; 1064 qparam.txop = 0; 1065 qparam.aifs = 2; 1066 1067 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1068 /* Update if QoS is enabled. */ 1069 if (enable_qos) { 1070 switch (ac) { 1071 case IEEE80211_AC_BK: 1072 qparam.cw_max = aCWmax; 1073 qparam.cw_min = aCWmin; 1074 qparam.txop = 0; 1075 if (is_ocb) 1076 qparam.aifs = 9; 1077 else 1078 qparam.aifs = 7; 1079 break; 1080 /* never happens but let's not leave undefined */ 1081 default: 1082 case IEEE80211_AC_BE: 1083 qparam.cw_max = aCWmax; 1084 qparam.cw_min = aCWmin; 1085 qparam.txop = 0; 1086 if (is_ocb) 1087 qparam.aifs = 6; 1088 else 1089 qparam.aifs = 3; 1090 break; 1091 case IEEE80211_AC_VI: 1092 qparam.cw_max = aCWmin; 1093 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1094 if (is_ocb) 1095 qparam.txop = 0; 1096 else if (use_11b) 1097 qparam.txop = 6016/32; 1098 else 1099 qparam.txop = 3008/32; 1100 1101 if (is_ocb) 1102 qparam.aifs = 3; 1103 else 1104 qparam.aifs = 2; 1105 break; 1106 case IEEE80211_AC_VO: 1107 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1108 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1109 if (is_ocb) 1110 qparam.txop = 0; 1111 else if (use_11b) 1112 qparam.txop = 3264/32; 1113 else 1114 qparam.txop = 1504/32; 1115 qparam.aifs = 2; 1116 break; 1117 } 1118 } 1119 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1120 1121 qparam.uapsd = false; 1122 1123 link->tx_conf[ac] = qparam; 1124 drv_conf_tx(local, link, ac, &qparam); 1125 } 1126 1127 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1128 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1129 sdata->vif.type != NL80211_IFTYPE_NAN) { 1130 link->conf->qos = enable_qos; 1131 if (bss_notify) 1132 ieee80211_link_info_change_notify(sdata, link, 1133 BSS_CHANGED_QOS); 1134 } 1135 } 1136 1137 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1138 u16 transaction, u16 auth_alg, u16 status, 1139 const u8 *extra, size_t extra_len, const u8 *da, 1140 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1141 u32 tx_flags) 1142 { 1143 struct ieee80211_local *local = sdata->local; 1144 struct sk_buff *skb; 1145 struct ieee80211_mgmt *mgmt; 1146 bool multi_link = ieee80211_vif_is_mld(&sdata->vif); 1147 struct { 1148 u8 id; 1149 u8 len; 1150 u8 ext_id; 1151 struct ieee80211_multi_link_elem ml; 1152 struct ieee80211_mle_basic_common_info basic; 1153 } __packed mle = { 1154 .id = WLAN_EID_EXTENSION, 1155 .len = sizeof(mle) - 2, 1156 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1157 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1158 .basic.len = sizeof(mle.basic), 1159 }; 1160 bool add_mle; 1161 int err; 1162 1163 add_mle = (multi_link && 1164 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 1165 extra, extra_len)); 1166 1167 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1168 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1169 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1170 add_mle * sizeof(mle)); 1171 if (!skb) 1172 return; 1173 1174 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1175 1176 mgmt = skb_put_zero(skb, 24 + 6); 1177 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1178 IEEE80211_STYPE_AUTH); 1179 memcpy(mgmt->da, da, ETH_ALEN); 1180 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1181 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1182 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1183 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1184 mgmt->u.auth.status_code = cpu_to_le16(status); 1185 if (extra) 1186 skb_put_data(skb, extra, extra_len); 1187 1188 if (add_mle) { 1189 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1190 skb_put_data(skb, &mle, sizeof(mle)); 1191 } 1192 1193 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1194 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1195 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1196 if (WARN_ON(err)) { 1197 kfree_skb(skb); 1198 return; 1199 } 1200 } 1201 1202 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1203 tx_flags; 1204 ieee80211_tx_skb(sdata, skb); 1205 } 1206 1207 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1208 const u8 *da, const u8 *bssid, 1209 u16 stype, u16 reason, 1210 bool send_frame, u8 *frame_buf) 1211 { 1212 struct ieee80211_local *local = sdata->local; 1213 struct sk_buff *skb; 1214 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1215 1216 /* build frame */ 1217 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1218 mgmt->duration = 0; /* initialize only */ 1219 mgmt->seq_ctrl = 0; /* initialize only */ 1220 memcpy(mgmt->da, da, ETH_ALEN); 1221 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1222 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1223 /* u.deauth.reason_code == u.disassoc.reason_code */ 1224 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1225 1226 if (send_frame) { 1227 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1228 IEEE80211_DEAUTH_FRAME_LEN); 1229 if (!skb) 1230 return; 1231 1232 skb_reserve(skb, local->hw.extra_tx_headroom); 1233 1234 /* copy in frame */ 1235 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1236 1237 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1238 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1239 IEEE80211_SKB_CB(skb)->flags |= 1240 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1241 1242 ieee80211_tx_skb(sdata, skb); 1243 } 1244 } 1245 1246 static int ieee80211_put_s1g_cap(struct sk_buff *skb, 1247 struct ieee80211_sta_s1g_cap *s1g_cap) 1248 { 1249 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap)) 1250 return -ENOBUFS; 1251 1252 skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES); 1253 skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap)); 1254 1255 skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap)); 1256 skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs)); 1257 1258 return 0; 1259 } 1260 1261 static int ieee80211_put_preq_ies_band(struct sk_buff *skb, 1262 struct ieee80211_sub_if_data *sdata, 1263 const u8 *ie, size_t ie_len, 1264 size_t *offset, 1265 enum nl80211_band band, 1266 u32 rate_mask, 1267 struct cfg80211_chan_def *chandef, 1268 u32 flags) 1269 { 1270 struct ieee80211_local *local = sdata->local; 1271 struct ieee80211_supported_band *sband; 1272 int i, err; 1273 size_t noffset; 1274 bool have_80mhz = false; 1275 1276 *offset = 0; 1277 1278 sband = local->hw.wiphy->bands[band]; 1279 if (WARN_ON_ONCE(!sband)) 1280 return 0; 1281 1282 /* For direct scan add S1G IE and consider its override bits */ 1283 if (band == NL80211_BAND_S1GHZ) 1284 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap); 1285 1286 /* 1287 * For EPP minimal content probes, restrict supported rates: 1288 * - 2 GHz: only 1, 2, 5.5, 6, 11, 12, 24 Mb/s 1289 * - 5/6 GHz: only 6, 12, 24 Mb/s 1290 */ 1291 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) { 1292 for (i = 0; i < sband->n_bitrates; i++) { 1293 u16 rate = sband->bitrates[i].bitrate; 1294 1295 if (band == NL80211_BAND_2GHZ) { 1296 if (rate != 10 && rate != 20 && 1297 rate != 55 && rate != 60 && 1298 rate != 110 && rate != 120 && 1299 rate != 240) 1300 rate_mask &= ~BIT(i); 1301 } else { 1302 if (rate != 60 && rate != 120 && rate != 240) 1303 rate_mask &= ~BIT(i); 1304 } 1305 } 1306 } 1307 1308 err = ieee80211_put_srates_elem(skb, sband, 0, 1309 ~rate_mask, WLAN_EID_SUPP_RATES); 1310 if (err) 1311 return err; 1312 1313 /* insert "request information" if in custom IEs */ 1314 if (ie && ie_len) { 1315 static const u8 before_extrates[] = { 1316 WLAN_EID_SSID, 1317 WLAN_EID_SUPP_RATES, 1318 WLAN_EID_REQUEST, 1319 }; 1320 noffset = ieee80211_ie_split(ie, ie_len, 1321 before_extrates, 1322 ARRAY_SIZE(before_extrates), 1323 *offset); 1324 if (skb_tailroom(skb) < noffset - *offset) 1325 return -ENOBUFS; 1326 skb_put_data(skb, ie + *offset, noffset - *offset); 1327 *offset = noffset; 1328 } 1329 1330 err = ieee80211_put_srates_elem(skb, sband, 0, 1331 ~rate_mask, WLAN_EID_EXT_SUPP_RATES); 1332 if (err) 1333 return err; 1334 1335 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1336 if (skb_tailroom(skb) < 3) 1337 return -ENOBUFS; 1338 skb_put_u8(skb, WLAN_EID_DS_PARAMS); 1339 skb_put_u8(skb, 1); 1340 skb_put_u8(skb, 1341 ieee80211_frequency_to_channel(chandef->chan->center_freq)); 1342 } 1343 1344 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1345 return 0; 1346 1347 /* insert custom IEs that go before HT */ 1348 if (ie && ie_len) { 1349 static const u8 before_ht[] = { 1350 /* 1351 * no need to list the ones split off already 1352 * (or generated here) 1353 */ 1354 WLAN_EID_DS_PARAMS, 1355 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1356 }; 1357 noffset = ieee80211_ie_split(ie, ie_len, 1358 before_ht, ARRAY_SIZE(before_ht), 1359 *offset); 1360 if (skb_tailroom(skb) < noffset - *offset) 1361 return -ENOBUFS; 1362 skb_put_data(skb, ie + *offset, noffset - *offset); 1363 *offset = noffset; 1364 } 1365 1366 if (sband->ht_cap.ht_supported) { 1367 u8 *pos; 1368 1369 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 1370 return -ENOBUFS; 1371 1372 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 1373 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1374 sband->ht_cap.cap); 1375 } 1376 1377 /* insert custom IEs that go before VHT */ 1378 if (ie && ie_len) { 1379 static const u8 before_vht[] = { 1380 /* 1381 * no need to list the ones split off already 1382 * (or generated here) 1383 */ 1384 WLAN_EID_BSS_COEX_2040, 1385 WLAN_EID_EXT_CAPABILITY, 1386 WLAN_EID_SSID_LIST, 1387 WLAN_EID_CHANNEL_USAGE, 1388 WLAN_EID_INTERWORKING, 1389 WLAN_EID_MESH_ID, 1390 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1391 }; 1392 noffset = ieee80211_ie_split(ie, ie_len, 1393 before_vht, ARRAY_SIZE(before_vht), 1394 *offset); 1395 if (skb_tailroom(skb) < noffset - *offset) 1396 return -ENOBUFS; 1397 skb_put_data(skb, ie + *offset, noffset - *offset); 1398 *offset = noffset; 1399 } 1400 1401 /* Check if any channel in this sband supports at least 80 MHz */ 1402 for (i = 0; i < sband->n_channels; i++) { 1403 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1404 IEEE80211_CHAN_NO_80MHZ)) 1405 continue; 1406 1407 have_80mhz = true; 1408 break; 1409 } 1410 1411 if (sband->vht_cap.vht_supported && have_80mhz) { 1412 u8 *pos; 1413 1414 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 1415 return -ENOBUFS; 1416 1417 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 1418 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1419 sband->vht_cap.cap); 1420 } 1421 1422 /* insert custom IEs that go before HE */ 1423 if (ie && ie_len) { 1424 static const u8 before_he[] = { 1425 /* 1426 * no need to list the ones split off before VHT 1427 * or generated here 1428 */ 1429 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1430 WLAN_EID_AP_CSN, 1431 /* TODO: add 11ah/11aj/11ak elements */ 1432 }; 1433 noffset = ieee80211_ie_split(ie, ie_len, 1434 before_he, ARRAY_SIZE(before_he), 1435 *offset); 1436 if (skb_tailroom(skb) < noffset - *offset) 1437 return -ENOBUFS; 1438 skb_put_data(skb, ie + *offset, noffset - *offset); 1439 *offset = noffset; 1440 } 1441 1442 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1443 IEEE80211_CHAN_NO_HE)) { 1444 err = ieee80211_put_he_cap(skb, sdata, sband, NULL); 1445 if (err) 1446 return err; 1447 } 1448 1449 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1450 IEEE80211_CHAN_NO_HE | 1451 IEEE80211_CHAN_NO_EHT)) { 1452 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL); 1453 if (err) 1454 return err; 1455 } 1456 1457 err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF); 1458 if (err) 1459 return err; 1460 1461 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1462 IEEE80211_CHAN_NO_UHR)) { 1463 err = ieee80211_put_uhr_cap(skb, sdata, sband); 1464 if (err) 1465 return err; 1466 } 1467 1468 /* 1469 * If adding more here, adjust code in main.c 1470 * that calculates local->scan_ies_len. 1471 */ 1472 1473 return 0; 1474 } 1475 1476 static int ieee80211_put_preq_ies(struct sk_buff *skb, 1477 struct ieee80211_sub_if_data *sdata, 1478 struct ieee80211_scan_ies *ie_desc, 1479 const u8 *ie, size_t ie_len, 1480 u8 bands_used, u32 *rate_masks, 1481 struct cfg80211_chan_def *chandef, 1482 u32 flags) 1483 { 1484 size_t custom_ie_offset = 0; 1485 int i, err; 1486 1487 memset(ie_desc, 0, sizeof(*ie_desc)); 1488 1489 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1490 if (bands_used & BIT(i)) { 1491 ie_desc->ies[i] = skb_tail_pointer(skb); 1492 err = ieee80211_put_preq_ies_band(skb, sdata, 1493 ie, ie_len, 1494 &custom_ie_offset, 1495 i, rate_masks[i], 1496 chandef, flags); 1497 if (err) 1498 return err; 1499 ie_desc->len[i] = skb_tail_pointer(skb) - 1500 ie_desc->ies[i]; 1501 } 1502 } 1503 1504 /* add any remaining custom IEs */ 1505 if (ie && ie_len) { 1506 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset, 1507 "not enough space for preq custom IEs\n")) 1508 return -ENOBUFS; 1509 ie_desc->common_ies = skb_tail_pointer(skb); 1510 skb_put_data(skb, ie + custom_ie_offset, 1511 ie_len - custom_ie_offset); 1512 ie_desc->common_ie_len = skb_tail_pointer(skb) - 1513 ie_desc->common_ies; 1514 } 1515 1516 return 0; 1517 }; 1518 1519 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 1520 size_t buffer_len, 1521 struct ieee80211_scan_ies *ie_desc, 1522 const u8 *ie, size_t ie_len, 1523 u8 bands_used, u32 *rate_masks, 1524 struct cfg80211_chan_def *chandef, 1525 u32 flags) 1526 { 1527 struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL); 1528 uintptr_t offs; 1529 int ret, i; 1530 u8 *start; 1531 1532 if (!skb) 1533 return -ENOMEM; 1534 1535 start = skb_tail_pointer(skb); 1536 memset(start, 0, skb_tailroom(skb)); 1537 ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len, 1538 bands_used, rate_masks, chandef, 1539 flags); 1540 if (ret < 0) { 1541 goto out; 1542 } 1543 1544 if (skb->len > buffer_len) { 1545 ret = -ENOBUFS; 1546 goto out; 1547 } 1548 1549 memcpy(buffer, start, skb->len); 1550 1551 /* adjust ie_desc for copy */ 1552 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1553 offs = ie_desc->ies[i] - start; 1554 ie_desc->ies[i] = buffer + offs; 1555 } 1556 offs = ie_desc->common_ies - start; 1557 ie_desc->common_ies = buffer + offs; 1558 1559 ret = skb->len; 1560 out: 1561 consume_skb(skb); 1562 return ret; 1563 } 1564 1565 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1566 const u8 *src, const u8 *dst, 1567 u32 ratemask, 1568 struct ieee80211_channel *chan, 1569 const u8 *ssid, size_t ssid_len, 1570 const u8 *ie, size_t ie_len, 1571 u32 flags) 1572 { 1573 struct ieee80211_local *local = sdata->local; 1574 struct cfg80211_chan_def chandef; 1575 struct sk_buff *skb; 1576 struct ieee80211_mgmt *mgmt; 1577 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1578 struct ieee80211_scan_ies dummy_ie_desc; 1579 1580 /* 1581 * Do not send DS Channel parameter for directed probe requests 1582 * in order to maximize the chance that we get a response. Some 1583 * badly-behaved APs don't respond when this parameter is included. 1584 */ 1585 chandef.width = sdata->vif.bss_conf.chanreq.oper.width; 1586 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1587 chandef.chan = NULL; 1588 else 1589 chandef.chan = chan; 1590 1591 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1592 local->scan_ies_len + ie_len); 1593 if (!skb) 1594 return NULL; 1595 1596 rate_masks[chan->band] = ratemask; 1597 ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc, 1598 ie, ie_len, BIT(chan->band), 1599 rate_masks, &chandef, flags); 1600 1601 if (dst) { 1602 mgmt = (struct ieee80211_mgmt *) skb->data; 1603 memcpy(mgmt->da, dst, ETH_ALEN); 1604 memcpy(mgmt->bssid, dst, ETH_ALEN); 1605 } 1606 1607 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1608 1609 return skb; 1610 } 1611 1612 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1613 struct ieee802_11_elems *elems, 1614 enum nl80211_band band, u32 *basic_rates) 1615 { 1616 struct ieee80211_supported_band *sband; 1617 size_t num_rates; 1618 u32 supp_rates; 1619 int i, j; 1620 1621 sband = sdata->local->hw.wiphy->bands[band]; 1622 if (WARN_ON(!sband)) 1623 return 1; 1624 1625 num_rates = sband->n_bitrates; 1626 supp_rates = 0; 1627 for (i = 0; i < elems->supp_rates_len + 1628 elems->ext_supp_rates_len; i++) { 1629 u8 rate = 0; 1630 int own_rate; 1631 bool is_basic; 1632 if (i < elems->supp_rates_len) 1633 rate = elems->supp_rates[i]; 1634 else if (elems->ext_supp_rates) 1635 rate = elems->ext_supp_rates 1636 [i - elems->supp_rates_len]; 1637 own_rate = 5 * (rate & 0x7f); 1638 is_basic = !!(rate & 0x80); 1639 1640 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1641 continue; 1642 1643 for (j = 0; j < num_rates; j++) { 1644 int brate = sband->bitrates[j].bitrate; 1645 1646 if (brate == own_rate) { 1647 supp_rates |= BIT(j); 1648 if (basic_rates && is_basic) 1649 *basic_rates |= BIT(j); 1650 } 1651 } 1652 } 1653 return supp_rates; 1654 } 1655 1656 void ieee80211_stop_device(struct ieee80211_local *local, bool suspend) 1657 { 1658 local_bh_disable(); 1659 ieee80211_handle_queued_frames(local); 1660 local_bh_enable(); 1661 1662 ieee80211_led_radio(local, false); 1663 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1664 1665 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1666 1667 flush_workqueue(local->workqueue); 1668 wiphy_work_flush(local->hw.wiphy, NULL); 1669 drv_stop(local, suspend); 1670 } 1671 1672 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1673 bool aborted) 1674 { 1675 /* It's possible that we don't handle the scan completion in 1676 * time during suspend, so if it's still marked as completed 1677 * here, queue the work and flush it to clean things up. 1678 * Instead of calling the worker function directly here, we 1679 * really queue it to avoid potential races with other flows 1680 * scheduling the same work. 1681 */ 1682 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1683 /* If coming from reconfiguration failure, abort the scan so 1684 * we don't attempt to continue a partial HW scan - which is 1685 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1686 * completed scan, and a 5 GHz portion is still pending. 1687 */ 1688 if (aborted) 1689 set_bit(SCAN_ABORTED, &local->scanning); 1690 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0); 1691 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 1692 } 1693 } 1694 1695 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1696 { 1697 struct ieee80211_sub_if_data *sdata; 1698 struct ieee80211_chanctx *ctx; 1699 1700 lockdep_assert_wiphy(local->hw.wiphy); 1701 1702 /* 1703 * We get here if during resume the device can't be restarted properly. 1704 * We might also get here if this happens during HW reset, which is a 1705 * slightly different situation and we need to drop all connections in 1706 * the latter case. 1707 * 1708 * Ask cfg80211 to turn off all interfaces, this will result in more 1709 * warnings but at least we'll then get into a clean stopped state. 1710 */ 1711 1712 local->resuming = false; 1713 local->suspended = false; 1714 local->in_reconfig = false; 1715 local->reconfig_failure = true; 1716 1717 ieee80211_flush_completed_scan(local, true); 1718 1719 /* scheduled scan clearly can't be running any more, but tell 1720 * cfg80211 and clear local state 1721 */ 1722 ieee80211_sched_scan_end(local); 1723 1724 list_for_each_entry(sdata, &local->interfaces, list) 1725 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1726 1727 /* Mark channel contexts as not being in the driver any more to avoid 1728 * removing them from the driver during the shutdown process... 1729 */ 1730 list_for_each_entry(ctx, &local->chanctx_list, list) 1731 ctx->driver_present = false; 1732 } 1733 1734 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1735 struct ieee80211_sub_if_data *sdata, 1736 struct ieee80211_link_data *link) 1737 { 1738 struct ieee80211_chanctx_conf *conf; 1739 struct ieee80211_chanctx *ctx; 1740 1741 lockdep_assert_wiphy(local->hw.wiphy); 1742 1743 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1744 lockdep_is_held(&local->hw.wiphy->mtx)); 1745 if (conf) { 1746 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1747 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 1748 } 1749 } 1750 1751 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1752 { 1753 struct ieee80211_local *local = sdata->local; 1754 struct sta_info *sta; 1755 1756 lockdep_assert_wiphy(local->hw.wiphy); 1757 1758 /* add STAs back */ 1759 list_for_each_entry(sta, &local->sta_list, list) { 1760 enum ieee80211_sta_state state; 1761 1762 if (!sta->uploaded || sta->sdata != sdata) 1763 continue; 1764 1765 for (state = IEEE80211_STA_NOTEXIST; 1766 state < sta->sta_state; state++) 1767 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1768 state + 1)); 1769 } 1770 } 1771 1772 static int 1773 ieee80211_reconfig_nan_offload_de(struct ieee80211_sub_if_data *sdata) 1774 { 1775 struct cfg80211_nan_func *func, **funcs; 1776 int res, id, i = 0; 1777 1778 funcs = kzalloc_objs(*funcs, sdata->local->hw.max_nan_de_entries + 1); 1779 if (!funcs) 1780 return -ENOMEM; 1781 1782 /* Add all the functions: 1783 * This is a little bit ugly. We need to call a potentially sleeping 1784 * callback for each NAN function, so we can't hold the spinlock. 1785 */ 1786 spin_lock_bh(&sdata->u.nan.de.func_lock); 1787 1788 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids, func, id) 1789 funcs[i++] = func; 1790 1791 spin_unlock_bh(&sdata->u.nan.de.func_lock); 1792 1793 for (i = 0; funcs[i]; i++) { 1794 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1795 if (WARN_ON(res)) 1796 ieee80211_nan_func_terminated(&sdata->vif, 1797 funcs[i]->instance_id, 1798 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1799 GFP_KERNEL); 1800 } 1801 1802 kfree(funcs); 1803 return res; 1804 } 1805 1806 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1807 { 1808 struct ieee80211_local *local = sdata->local; 1809 struct ieee80211_sub_if_data *ndi_sdata; 1810 struct sta_info *sta; 1811 int res; 1812 1813 res = drv_start_nan(local, sdata, &sdata->u.nan.conf); 1814 if (WARN_ON(res)) 1815 return res; 1816 1817 if (!(sdata->local->hw.wiphy->nan_capa.flags & WIPHY_NAN_FLAGS_USERSPACE_DE)) 1818 return ieee80211_reconfig_nan_offload_de(sdata); 1819 1820 drv_vif_cfg_changed(sdata->local, sdata, BSS_CHANGED_NAN_LOCAL_SCHED); 1821 1822 /* Now we can add all the NDIs to the driver */ 1823 list_for_each_entry(ndi_sdata, &local->interfaces, list) { 1824 if (ndi_sdata->vif.type == NL80211_IFTYPE_NAN_DATA) { 1825 res = drv_add_interface(local, ndi_sdata); 1826 if (WARN_ON(res)) 1827 return res; 1828 } 1829 } 1830 1831 /* Add NMI stations (stations on the NAN interface) */ 1832 list_for_each_entry(sta, &local->sta_list, list) { 1833 enum ieee80211_sta_state state; 1834 1835 if (!sta->uploaded || sta->sdata != sdata) 1836 continue; 1837 1838 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; 1839 state++) { 1840 res = drv_sta_state(local, sdata, sta, state, 1841 state + 1); 1842 if (WARN_ON(res)) 1843 return res; 1844 } 1845 1846 /* Add peer schedules for NMI stations that have them */ 1847 if (!sta->sta.nan_sched) 1848 continue; 1849 1850 res = drv_nan_peer_sched_changed(local, sdata, sta); 1851 if (WARN_ON(res)) 1852 return res; 1853 } 1854 1855 /* Add NDI stations (stations on NAN_DATA interfaces) */ 1856 list_for_each_entry(sta, &local->sta_list, list) { 1857 enum ieee80211_sta_state state; 1858 1859 if (!sta->uploaded || 1860 sta->sdata->vif.type != NL80211_IFTYPE_NAN_DATA) 1861 continue; 1862 1863 if (WARN_ON(!sta->sta.nmi)) 1864 continue; 1865 1866 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; 1867 state++) { 1868 res = drv_sta_state(local, sta->sdata, sta, state, 1869 state + 1); 1870 if (WARN_ON(res)) 1871 return res; 1872 } 1873 } 1874 1875 return 0; 1876 } 1877 1878 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local, 1879 struct ieee80211_sub_if_data *sdata, 1880 u64 changed) 1881 { 1882 int link_id; 1883 1884 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 1885 struct ieee80211_link_data *link; 1886 1887 if (!(sdata->vif.active_links & BIT(link_id))) 1888 continue; 1889 1890 link = sdata_dereference(sdata->link[link_id], sdata); 1891 if (!link) 1892 continue; 1893 1894 if (rcu_access_pointer(link->u.ap.beacon)) 1895 drv_start_ap(local, sdata, link->conf); 1896 1897 if (!link->conf->enable_beacon) 1898 continue; 1899 1900 changed |= BSS_CHANGED_BEACON | 1901 BSS_CHANGED_BEACON_ENABLED; 1902 1903 ieee80211_link_info_change_notify(sdata, link, changed); 1904 } 1905 } 1906 1907 int ieee80211_reconfig(struct ieee80211_local *local) 1908 { 1909 struct ieee80211_hw *hw = &local->hw; 1910 struct ieee80211_sub_if_data *sdata; 1911 struct ieee80211_chanctx *ctx; 1912 struct sta_info *sta; 1913 int res, i; 1914 bool reconfig_due_to_wowlan = false; 1915 struct ieee80211_sub_if_data *sched_scan_sdata; 1916 struct cfg80211_sched_scan_request *sched_scan_req; 1917 bool sched_scan_stopped = false; 1918 bool suspended = local->suspended; 1919 bool in_reconfig = false; 1920 1921 lockdep_assert_wiphy(local->hw.wiphy); 1922 1923 /* nothing to do if HW shouldn't run */ 1924 if (!local->open_count) 1925 goto wake_up; 1926 1927 #ifdef CONFIG_PM 1928 if (suspended) 1929 local->resuming = true; 1930 1931 if (local->wowlan) { 1932 /* 1933 * In the wowlan case, both mac80211 and the device 1934 * are functional when the resume op is called, so 1935 * clear local->suspended so the device could operate 1936 * normally (e.g. pass rx frames). 1937 */ 1938 local->suspended = false; 1939 res = drv_resume(local); 1940 local->wowlan = false; 1941 if (res < 0) { 1942 local->resuming = false; 1943 return res; 1944 } 1945 if (res == 0) 1946 goto wake_up; 1947 WARN_ON(res > 1); 1948 /* 1949 * res is 1, which means the driver requested 1950 * to go through a regular reset on wakeup. 1951 * restore local->suspended in this case. 1952 */ 1953 reconfig_due_to_wowlan = true; 1954 local->suspended = true; 1955 } 1956 #endif 1957 1958 /* 1959 * In case of hw_restart during suspend (without wowlan), 1960 * cancel restart work, as we are reconfiguring the device 1961 * anyway. 1962 * Note that restart_work is scheduled on a frozen workqueue, 1963 * so we can't deadlock in this case. 1964 */ 1965 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1966 cancel_work_sync(&local->restart_work); 1967 1968 local->started = false; 1969 1970 /* 1971 * Upon resume hardware can sometimes be goofy due to 1972 * various platform / driver / bus issues, so restarting 1973 * the device may at times not work immediately. Propagate 1974 * the error. 1975 */ 1976 res = drv_start(local); 1977 if (res) { 1978 if (suspended) 1979 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1980 else 1981 WARN(1, "Hardware became unavailable during restart.\n"); 1982 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 1983 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 1984 false); 1985 ieee80211_handle_reconfig_failure(local); 1986 return res; 1987 } 1988 1989 /* setup fragmentation threshold */ 1990 drv_set_frag_threshold(local, -1, hw->wiphy->frag_threshold); 1991 1992 /* setup RTS threshold */ 1993 if (hw->wiphy->n_radio > 0) { 1994 for (i = 0; i < hw->wiphy->n_radio; i++) { 1995 u32 rts_threshold = 1996 hw->wiphy->radio_cfg[i].rts_threshold; 1997 1998 drv_set_rts_threshold(local, i, rts_threshold); 1999 } 2000 } else { 2001 drv_set_rts_threshold(local, -1, hw->wiphy->rts_threshold); 2002 } 2003 2004 /* reset coverage class */ 2005 drv_set_coverage_class(local, -1, hw->wiphy->coverage_class); 2006 2007 ieee80211_led_radio(local, true); 2008 ieee80211_mod_tpt_led_trig(local, 2009 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 2010 2011 /* add interfaces */ 2012 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2013 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 2014 /* in HW restart it exists already */ 2015 WARN_ON(local->resuming); 2016 res = drv_add_interface(local, sdata); 2017 if (WARN_ON(res)) { 2018 RCU_INIT_POINTER(local->monitor_sdata, NULL); 2019 synchronize_net(); 2020 kfree(sdata); 2021 } 2022 } 2023 2024 list_for_each_entry(sdata, &local->interfaces, list) { 2025 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 2026 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 2027 continue; 2028 /* These vifs can't be added before NAN was started */ 2029 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 2030 continue; 2031 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2032 ieee80211_sdata_running(sdata)) { 2033 res = drv_add_interface(local, sdata); 2034 if (WARN_ON(res)) 2035 break; 2036 } 2037 } 2038 2039 /* If adding any of the interfaces failed above, roll back and 2040 * report failure. 2041 */ 2042 if (res) { 2043 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2044 list) { 2045 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 2046 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 2047 continue; 2048 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 2049 continue; 2050 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2051 ieee80211_sdata_running(sdata)) 2052 drv_remove_interface(local, sdata); 2053 } 2054 ieee80211_handle_reconfig_failure(local); 2055 return res; 2056 } 2057 2058 /* add channel contexts */ 2059 list_for_each_entry(ctx, &local->chanctx_list, list) 2060 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) 2061 WARN_ON(drv_add_chanctx(local, ctx)); 2062 2063 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2064 if (sdata && ieee80211_sdata_running(sdata)) 2065 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2066 2067 /* reconfigure hardware */ 2068 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL | 2069 IEEE80211_CONF_CHANGE_MONITOR | 2070 IEEE80211_CONF_CHANGE_PS | 2071 IEEE80211_CONF_CHANGE_RETRY_LIMITS | 2072 IEEE80211_CONF_CHANGE_IDLE); 2073 2074 ieee80211_configure_filter(local); 2075 2076 /* Finally also reconfigure all the BSS information */ 2077 list_for_each_entry(sdata, &local->interfaces, list) { 2078 /* common change flags for all interface types - link only */ 2079 u64 changed = BSS_CHANGED_ERP_CTS_PROT | 2080 BSS_CHANGED_ERP_PREAMBLE | 2081 BSS_CHANGED_ERP_SLOT | 2082 BSS_CHANGED_HT | 2083 BSS_CHANGED_BASIC_RATES | 2084 BSS_CHANGED_BEACON_INT | 2085 BSS_CHANGED_BSSID | 2086 BSS_CHANGED_CQM | 2087 BSS_CHANGED_QOS | 2088 BSS_CHANGED_TXPOWER | 2089 BSS_CHANGED_MCAST_RATE; 2090 struct ieee80211_link_data *link = NULL; 2091 unsigned int link_id; 2092 u32 active_links = 0; 2093 2094 if (!ieee80211_sdata_running(sdata)) 2095 continue; 2096 2097 if (ieee80211_vif_is_mld(&sdata->vif)) { 2098 struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = { 2099 [0] = &sdata->vif.bss_conf, 2100 }; 2101 2102 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2103 /* start with a single active link */ 2104 active_links = sdata->vif.active_links; 2105 link_id = ffs(active_links) - 1; 2106 sdata->vif.active_links = BIT(link_id); 2107 } 2108 2109 drv_change_vif_links(local, sdata, 0, 2110 sdata->vif.active_links, 2111 old); 2112 } 2113 2114 sdata->restart_active_links = active_links; 2115 2116 for (link_id = 0; 2117 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2118 link_id++) { 2119 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 2120 continue; 2121 2122 link = sdata_dereference(sdata->link[link_id], sdata); 2123 if (!link) 2124 continue; 2125 2126 ieee80211_assign_chanctx(local, sdata, link); 2127 } 2128 2129 switch (sdata->vif.type) { 2130 case NL80211_IFTYPE_AP_VLAN: 2131 case NL80211_IFTYPE_MONITOR: 2132 break; 2133 case NL80211_IFTYPE_NAN: 2134 case NL80211_IFTYPE_NAN_DATA: 2135 /* NAN stations are handled later */ 2136 break; 2137 case NL80211_IFTYPE_ADHOC: 2138 if (sdata->vif.cfg.ibss_joined) 2139 WARN_ON(drv_join_ibss(local, sdata)); 2140 fallthrough; 2141 default: 2142 ieee80211_reconfig_stations(sdata); 2143 fallthrough; 2144 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2145 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2146 drv_conf_tx(local, &sdata->deflink, i, 2147 &sdata->deflink.tx_conf[i]); 2148 break; 2149 } 2150 2151 if (sdata->vif.bss_conf.mu_mimo_owner) 2152 changed |= BSS_CHANGED_MU_GROUPS; 2153 2154 if (!ieee80211_vif_is_mld(&sdata->vif)) 2155 changed |= BSS_CHANGED_IDLE; 2156 2157 switch (sdata->vif.type) { 2158 case NL80211_IFTYPE_STATION: 2159 if (!ieee80211_vif_is_mld(&sdata->vif)) { 2160 changed |= BSS_CHANGED_ASSOC | 2161 BSS_CHANGED_ARP_FILTER | 2162 BSS_CHANGED_PS; 2163 2164 /* Re-send beacon info report to the driver */ 2165 if (sdata->deflink.u.mgd.have_beacon) 2166 changed |= BSS_CHANGED_BEACON_INFO; 2167 2168 if (sdata->vif.bss_conf.max_idle_period || 2169 sdata->vif.bss_conf.protected_keep_alive) 2170 changed |= BSS_CHANGED_KEEP_ALIVE; 2171 2172 ieee80211_bss_info_change_notify(sdata, 2173 changed); 2174 } else if (!WARN_ON(!link)) { 2175 if (link->conf->npca.enabled) 2176 changed |= BSS_CHANGED_NPCA; 2177 2178 ieee80211_link_info_change_notify(sdata, link, 2179 changed); 2180 changed = BSS_CHANGED_ASSOC | 2181 BSS_CHANGED_IDLE | 2182 BSS_CHANGED_PS | 2183 BSS_CHANGED_ARP_FILTER; 2184 ieee80211_vif_cfg_change_notify(sdata, changed); 2185 } 2186 break; 2187 case NL80211_IFTYPE_OCB: 2188 changed |= BSS_CHANGED_OCB; 2189 ieee80211_bss_info_change_notify(sdata, changed); 2190 break; 2191 case NL80211_IFTYPE_ADHOC: 2192 changed |= BSS_CHANGED_IBSS; 2193 fallthrough; 2194 case NL80211_IFTYPE_AP: 2195 changed |= BSS_CHANGED_P2P_PS; 2196 2197 if (ieee80211_vif_is_mld(&sdata->vif)) 2198 ieee80211_vif_cfg_change_notify(sdata, 2199 BSS_CHANGED_SSID); 2200 else 2201 changed |= BSS_CHANGED_SSID; 2202 2203 if (sdata->vif.bss_conf.ftm_responder == 1 && 2204 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2205 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2206 changed |= BSS_CHANGED_FTM_RESPONDER; 2207 2208 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2209 changed |= BSS_CHANGED_AP_PROBE_RESP; 2210 2211 if (ieee80211_vif_is_mld(&sdata->vif)) { 2212 ieee80211_reconfig_ap_links(local, 2213 sdata, 2214 changed); 2215 break; 2216 } 2217 2218 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2219 drv_start_ap(local, sdata, 2220 sdata->deflink.conf); 2221 } 2222 fallthrough; 2223 case NL80211_IFTYPE_MESH_POINT: 2224 if (sdata->vif.bss_conf.enable_beacon) { 2225 changed |= BSS_CHANGED_BEACON | 2226 BSS_CHANGED_BEACON_ENABLED; 2227 ieee80211_bss_info_change_notify(sdata, changed); 2228 } 2229 break; 2230 case NL80211_IFTYPE_NAN: 2231 WARN_ON(ieee80211_reconfig_nan(sdata)); 2232 break; 2233 case NL80211_IFTYPE_NAN_DATA: 2234 case NL80211_IFTYPE_AP_VLAN: 2235 case NL80211_IFTYPE_MONITOR: 2236 case NL80211_IFTYPE_P2P_DEVICE: 2237 case NL80211_IFTYPE_PD: 2238 /* nothing to do */ 2239 break; 2240 case NL80211_IFTYPE_UNSPECIFIED: 2241 case NUM_NL80211_IFTYPES: 2242 case NL80211_IFTYPE_P2P_CLIENT: 2243 case NL80211_IFTYPE_P2P_GO: 2244 case NL80211_IFTYPE_WDS: 2245 WARN_ON(1); 2246 break; 2247 } 2248 } 2249 2250 ieee80211_recalc_ps(local); 2251 2252 /* 2253 * The sta might be in psm against the ap (e.g. because 2254 * this was the state before a hw restart), so we 2255 * explicitly send a null packet in order to make sure 2256 * it'll sync against the ap (and get out of psm). 2257 */ 2258 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2259 list_for_each_entry(sdata, &local->interfaces, list) { 2260 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2261 continue; 2262 if (!sdata->u.mgd.associated) 2263 continue; 2264 2265 ieee80211_send_nullfunc(local, sdata, false); 2266 } 2267 } 2268 2269 /* APs are now beaconing, add back stations */ 2270 list_for_each_entry(sdata, &local->interfaces, list) { 2271 if (!ieee80211_sdata_running(sdata)) 2272 continue; 2273 2274 switch (sdata->vif.type) { 2275 case NL80211_IFTYPE_AP_VLAN: 2276 case NL80211_IFTYPE_AP: 2277 ieee80211_reconfig_stations(sdata); 2278 break; 2279 default: 2280 break; 2281 } 2282 } 2283 2284 /* add back keys */ 2285 list_for_each_entry(sdata, &local->interfaces, list) 2286 ieee80211_reenable_keys(sdata); 2287 2288 /* re-enable multi-link for client interfaces */ 2289 list_for_each_entry(sdata, &local->interfaces, list) { 2290 if (sdata->restart_active_links) 2291 ieee80211_set_active_links(&sdata->vif, 2292 sdata->restart_active_links); 2293 /* 2294 * If a link switch was scheduled before the restart, and ran 2295 * before reconfig, it will do nothing, so re-schedule. 2296 */ 2297 if (sdata->desired_active_links) 2298 wiphy_work_queue(sdata->local->hw.wiphy, 2299 &sdata->activate_links_work); 2300 } 2301 2302 /* Reconfigure sched scan if it was interrupted by FW restart */ 2303 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2304 lockdep_is_held(&local->hw.wiphy->mtx)); 2305 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2306 lockdep_is_held(&local->hw.wiphy->mtx)); 2307 if (sched_scan_sdata && sched_scan_req) 2308 /* 2309 * Sched scan stopped, but we don't want to report it. Instead, 2310 * we're trying to reschedule. However, if more than one scan 2311 * plan was set, we cannot reschedule since we don't know which 2312 * scan plan was currently running (and some scan plans may have 2313 * already finished). 2314 */ 2315 if (sched_scan_req->n_scan_plans > 1 || 2316 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2317 sched_scan_req)) { 2318 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2319 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2320 sched_scan_stopped = true; 2321 } 2322 2323 if (sched_scan_stopped) 2324 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2325 2326 wake_up: 2327 /* 2328 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2329 * sessions can be established after a resume. 2330 * 2331 * Also tear down aggregation sessions since reconfiguring 2332 * them in a hardware restart scenario is not easily done 2333 * right now, and the hardware will have lost information 2334 * about the sessions, but we and the AP still think they 2335 * are active. This is really a workaround though. 2336 */ 2337 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2338 list_for_each_entry(sta, &local->sta_list, list) { 2339 if (!local->resuming) 2340 ieee80211_sta_tear_down_BA_sessions( 2341 sta, AGG_STOP_LOCAL_REQUEST); 2342 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2343 } 2344 } 2345 2346 /* 2347 * If this is for hw restart things are still running. 2348 * We may want to change that later, however. 2349 */ 2350 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2351 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2352 2353 if (local->in_reconfig) { 2354 in_reconfig = local->in_reconfig; 2355 local->in_reconfig = false; 2356 barrier(); 2357 2358 ieee80211_reconfig_roc(local); 2359 2360 /* Requeue all works */ 2361 list_for_each_entry(sdata, &local->interfaces, list) { 2362 if (ieee80211_sdata_running(sdata)) 2363 wiphy_work_queue(local->hw.wiphy, &sdata->work); 2364 } 2365 } 2366 2367 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2368 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2369 false); 2370 2371 if (in_reconfig) { 2372 list_for_each_entry(sdata, &local->interfaces, list) { 2373 if (!ieee80211_sdata_running(sdata)) 2374 continue; 2375 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2376 ieee80211_sta_restart(sdata); 2377 } 2378 } 2379 2380 /* Passing NULL means an interface is picked for configuration */ 2381 if (local->virt_monitors > 0 && 2382 local->virt_monitors == local->open_count) 2383 ieee80211_add_virtual_monitor(local, NULL); 2384 2385 if (!suspended) 2386 return 0; 2387 2388 #ifdef CONFIG_PM 2389 /* first set suspended false, then resuming */ 2390 local->suspended = false; 2391 mb(); 2392 local->resuming = false; 2393 2394 ieee80211_flush_completed_scan(local, false); 2395 2396 if (local->open_count && !reconfig_due_to_wowlan) 2397 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2398 2399 list_for_each_entry(sdata, &local->interfaces, list) { 2400 if (!ieee80211_sdata_running(sdata)) 2401 continue; 2402 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2403 ieee80211_sta_restart(sdata); 2404 } 2405 2406 mod_timer(&local->sta_cleanup, jiffies + 1); 2407 #else 2408 WARN_ON(1); 2409 #endif 2410 2411 return 0; 2412 } 2413 2414 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2415 { 2416 struct ieee80211_sub_if_data *sdata; 2417 struct ieee80211_local *local; 2418 struct ieee80211_key *key; 2419 2420 if (WARN_ON(!vif)) 2421 return; 2422 2423 sdata = vif_to_sdata(vif); 2424 local = sdata->local; 2425 2426 lockdep_assert_wiphy(local->hw.wiphy); 2427 2428 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2429 !local->resuming)) 2430 return; 2431 2432 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2433 !local->in_reconfig)) 2434 return; 2435 2436 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2437 return; 2438 2439 sdata->flags |= flag; 2440 2441 list_for_each_entry(key, &sdata->key_list, list) 2442 key->flags |= KEY_FLAG_TAINTED; 2443 } 2444 2445 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2446 { 2447 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2448 } 2449 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2450 2451 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2452 { 2453 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2454 } 2455 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2456 2457 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2458 struct ieee80211_link_data *link) 2459 { 2460 struct ieee80211_local *local = sdata->local; 2461 struct ieee80211_chanctx_conf *chanctx_conf; 2462 struct ieee80211_chanctx *chanctx; 2463 2464 lockdep_assert_wiphy(local->hw.wiphy); 2465 2466 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2467 lockdep_is_held(&local->hw.wiphy->mtx)); 2468 2469 /* 2470 * This function can be called from a work, thus it may be possible 2471 * that the chanctx_conf is removed (due to a disconnection, for 2472 * example). 2473 * So nothing should be done in such case. 2474 */ 2475 if (!chanctx_conf) 2476 return; 2477 2478 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2479 ieee80211_recalc_smps_chanctx(local, chanctx); 2480 } 2481 2482 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2483 int link_id) 2484 { 2485 struct ieee80211_local *local = sdata->local; 2486 struct ieee80211_chanctx_conf *chanctx_conf; 2487 struct ieee80211_chanctx *chanctx; 2488 int i; 2489 2490 lockdep_assert_wiphy(local->hw.wiphy); 2491 2492 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2493 struct ieee80211_bss_conf *bss_conf; 2494 2495 if (link_id >= 0 && link_id != i) 2496 continue; 2497 2498 rcu_read_lock(); 2499 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2500 if (!bss_conf) { 2501 rcu_read_unlock(); 2502 continue; 2503 } 2504 2505 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2506 lockdep_is_held(&local->hw.wiphy->mtx)); 2507 /* 2508 * Since we hold the wiphy mutex (checked above) 2509 * we can take the chanctx_conf pointer out of the 2510 * RCU critical section, it cannot go away without 2511 * the mutex. Just the way we reached it could - in 2512 * theory - go away, but we don't really care and 2513 * it really shouldn't happen anyway. 2514 */ 2515 rcu_read_unlock(); 2516 2517 if (!chanctx_conf) 2518 return; 2519 2520 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2521 conf); 2522 ieee80211_recalc_chanctx_min_def(local, chanctx); 2523 } 2524 } 2525 2526 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2527 { 2528 size_t pos = offset; 2529 2530 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2531 pos += 2 + ies[pos + 1]; 2532 2533 return pos; 2534 } 2535 2536 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2537 u16 cap) 2538 { 2539 __le16 tmp; 2540 2541 *pos++ = WLAN_EID_HT_CAPABILITY; 2542 *pos++ = sizeof(struct ieee80211_ht_cap); 2543 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2544 2545 /* capability flags */ 2546 tmp = cpu_to_le16(cap); 2547 memcpy(pos, &tmp, sizeof(u16)); 2548 pos += sizeof(u16); 2549 2550 /* AMPDU parameters */ 2551 *pos++ = ht_cap->ampdu_factor | 2552 (ht_cap->ampdu_density << 2553 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2554 2555 /* MCS set */ 2556 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2557 pos += sizeof(ht_cap->mcs); 2558 2559 /* extended capabilities */ 2560 pos += sizeof(__le16); 2561 2562 /* BF capabilities */ 2563 pos += sizeof(__le32); 2564 2565 /* antenna selection */ 2566 pos += sizeof(u8); 2567 2568 return pos; 2569 } 2570 2571 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2572 u32 cap) 2573 { 2574 __le32 tmp; 2575 2576 *pos++ = WLAN_EID_VHT_CAPABILITY; 2577 *pos++ = sizeof(struct ieee80211_vht_cap); 2578 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2579 2580 /* capability flags */ 2581 tmp = cpu_to_le32(cap); 2582 memcpy(pos, &tmp, sizeof(u32)); 2583 pos += sizeof(u32); 2584 2585 /* VHT MCS set */ 2586 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2587 pos += sizeof(vht_cap->vht_mcs); 2588 2589 return pos; 2590 } 2591 2592 /* this may return more than ieee80211_put_he_6ghz_cap() will need */ 2593 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata) 2594 { 2595 const struct ieee80211_sta_he_cap *he_cap; 2596 struct ieee80211_supported_band *sband; 2597 u8 n; 2598 2599 sband = ieee80211_get_sband(sdata); 2600 if (!sband) 2601 return 0; 2602 2603 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2604 if (!he_cap) 2605 return 0; 2606 2607 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2608 return 2 + 1 + 2609 sizeof(he_cap->he_cap_elem) + n + 2610 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2611 he_cap->he_cap_elem.phy_cap_info); 2612 } 2613 2614 static void 2615 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn, 2616 const struct ieee80211_sta_he_cap *he_cap, 2617 struct ieee80211_he_cap_elem *elem) 2618 { 2619 u8 ru_limit, max_ru; 2620 2621 *elem = he_cap->he_cap_elem; 2622 2623 switch (conn->bw_limit) { 2624 case IEEE80211_CONN_BW_LIMIT_20: 2625 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242; 2626 break; 2627 case IEEE80211_CONN_BW_LIMIT_40: 2628 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484; 2629 break; 2630 case IEEE80211_CONN_BW_LIMIT_80: 2631 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996; 2632 break; 2633 default: 2634 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996; 2635 break; 2636 } 2637 2638 max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2639 max_ru = min(max_ru, ru_limit); 2640 elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2641 elem->phy_cap_info[8] |= max_ru; 2642 2643 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) { 2644 elem->phy_cap_info[0] &= 2645 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 2646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 2647 elem->phy_cap_info[9] &= 2648 ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM; 2649 } 2650 2651 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 2652 elem->phy_cap_info[0] &= 2653 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 2654 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G); 2655 elem->phy_cap_info[5] &= 2656 ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK; 2657 elem->phy_cap_info[7] &= 2658 ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ | 2659 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ); 2660 } 2661 } 2662 2663 int ieee80211_put_he_cap(struct sk_buff *skb, 2664 struct ieee80211_sub_if_data *sdata, 2665 const struct ieee80211_supported_band *sband, 2666 const struct ieee80211_conn_settings *conn) 2667 { 2668 const struct ieee80211_sta_he_cap *he_cap; 2669 struct ieee80211_he_cap_elem elem; 2670 u8 *len; 2671 u8 n; 2672 u8 ie_len; 2673 2674 if (!conn) 2675 conn = &ieee80211_conn_settings_unlimited; 2676 2677 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2678 if (!he_cap) 2679 return 0; 2680 2681 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 2682 ieee80211_get_adjusted_he_cap(conn, he_cap, &elem); 2683 2684 n = ieee80211_he_mcs_nss_size(&elem); 2685 ie_len = 2 + 1 + 2686 sizeof(he_cap->he_cap_elem) + n + 2687 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2688 he_cap->he_cap_elem.phy_cap_info); 2689 2690 if (skb_tailroom(skb) < ie_len) 2691 return -ENOBUFS; 2692 2693 skb_put_u8(skb, WLAN_EID_EXTENSION); 2694 len = skb_put(skb, 1); /* We'll set the size later below */ 2695 skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY); 2696 2697 /* Fixed data */ 2698 skb_put_data(skb, &elem, sizeof(elem)); 2699 2700 skb_put_data(skb, &he_cap->he_mcs_nss_supp, n); 2701 2702 /* Check if PPE Threshold should be present */ 2703 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2704 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2705 goto end; 2706 2707 /* 2708 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2709 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2710 */ 2711 n = hweight8(he_cap->ppe_thres[0] & 2712 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2713 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2714 IEEE80211_PPE_THRES_NSS_POS)); 2715 2716 /* 2717 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2718 * total size. 2719 */ 2720 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2721 n = DIV_ROUND_UP(n, 8); 2722 2723 /* Copy PPE Thresholds */ 2724 skb_put_data(skb, &he_cap->ppe_thres, n); 2725 2726 end: 2727 *len = skb_tail_pointer(skb) - len - 1; 2728 return 0; 2729 } 2730 2731 void ieee80211_put_reg_conn(struct ieee80211_sub_if_data *sdata, 2732 struct sk_buff *skb) 2733 { 2734 u32 flags = IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT; 2735 struct ieee80211_local *local = sdata->local; 2736 u8 reg_conn = IEEE80211_REG_CONN_LPI_VALID | 2737 IEEE80211_REG_CONN_LPI_VALUE | 2738 IEEE80211_REG_CONN_SP_VALID; 2739 struct ieee80211_supported_band *sband; 2740 bool available_channels = false; 2741 int i; 2742 2743 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2744 if (!sband) 2745 return; 2746 2747 for (i = 0; i < sband->n_channels; i++) { 2748 if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED) 2749 continue; 2750 flags &= sband->channels[i].flags; 2751 available_channels = true; 2752 } 2753 2754 if (!available_channels) 2755 return; 2756 2757 if (!(flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT)) 2758 reg_conn |= IEEE80211_REG_CONN_SP_VALUE; 2759 2760 skb_put_u8(skb, WLAN_EID_EXTENSION); 2761 skb_put_u8(skb, 1 + sizeof(reg_conn)); 2762 skb_put_u8(skb, WLAN_EID_EXT_NON_AP_STA_REG_CON); 2763 skb_put_u8(skb, reg_conn); 2764 } 2765 2766 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb, 2767 struct ieee80211_sub_if_data *sdata, 2768 enum ieee80211_smps_mode smps_mode) 2769 { 2770 struct ieee80211_supported_band *sband; 2771 const struct ieee80211_sband_iftype_data *iftd; 2772 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2773 __le16 cap; 2774 2775 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 2776 BIT(NL80211_BAND_6GHZ), 2777 IEEE80211_CHAN_NO_HE)) 2778 return 0; 2779 2780 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2781 2782 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2783 if (!iftd) 2784 return 0; 2785 2786 /* Check for device HE 6 GHz capability before adding element */ 2787 if (!iftd->he_6ghz_capa.capa) 2788 return 0; 2789 2790 cap = iftd->he_6ghz_capa.capa; 2791 cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS); 2792 2793 switch (smps_mode) { 2794 case IEEE80211_SMPS_AUTOMATIC: 2795 case IEEE80211_SMPS_NUM_MODES: 2796 WARN_ON(1); 2797 fallthrough; 2798 case IEEE80211_SMPS_OFF: 2799 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 2800 IEEE80211_HE_6GHZ_CAP_SM_PS); 2801 break; 2802 case IEEE80211_SMPS_STATIC: 2803 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 2804 IEEE80211_HE_6GHZ_CAP_SM_PS); 2805 break; 2806 case IEEE80211_SMPS_DYNAMIC: 2807 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 2808 IEEE80211_HE_6GHZ_CAP_SM_PS); 2809 break; 2810 } 2811 2812 if (skb_tailroom(skb) < 2 + 1 + sizeof(cap)) 2813 return -ENOBUFS; 2814 2815 skb_put_u8(skb, WLAN_EID_EXTENSION); 2816 skb_put_u8(skb, 1 + sizeof(cap)); 2817 skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA); 2818 skb_put_data(skb, &cap, sizeof(cap)); 2819 return 0; 2820 } 2821 2822 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2823 const struct cfg80211_chan_def *chandef, 2824 u16 prot_mode, bool rifs_mode) 2825 { 2826 struct ieee80211_ht_operation *ht_oper; 2827 /* Build HT Information */ 2828 *pos++ = WLAN_EID_HT_OPERATION; 2829 *pos++ = sizeof(struct ieee80211_ht_operation); 2830 ht_oper = (struct ieee80211_ht_operation *)pos; 2831 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2832 chandef->chan->center_freq); 2833 switch (chandef->width) { 2834 case NL80211_CHAN_WIDTH_160: 2835 case NL80211_CHAN_WIDTH_80P80: 2836 case NL80211_CHAN_WIDTH_80: 2837 case NL80211_CHAN_WIDTH_40: 2838 if (chandef->center_freq1 > chandef->chan->center_freq) 2839 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2840 else 2841 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2842 break; 2843 case NL80211_CHAN_WIDTH_320: 2844 /* HT information element should not be included on 6GHz */ 2845 WARN_ON(1); 2846 return pos; 2847 default: 2848 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2849 break; 2850 } 2851 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2852 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2853 chandef->width != NL80211_CHAN_WIDTH_20) 2854 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2855 2856 if (rifs_mode) 2857 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2858 2859 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2860 ht_oper->stbc_param = 0x0000; 2861 2862 /* It seems that Basic MCS set and Supported MCS set 2863 are identical for the first 10 bytes */ 2864 memset(&ht_oper->basic_set, 0, 16); 2865 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2866 2867 return pos + sizeof(struct ieee80211_ht_operation); 2868 } 2869 2870 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2871 const struct cfg80211_chan_def *chandef) 2872 { 2873 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2874 *pos++ = 3; /* IE length */ 2875 /* New channel width */ 2876 switch (chandef->width) { 2877 case NL80211_CHAN_WIDTH_80: 2878 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2879 break; 2880 case NL80211_CHAN_WIDTH_160: 2881 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2882 break; 2883 case NL80211_CHAN_WIDTH_80P80: 2884 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2885 break; 2886 case NL80211_CHAN_WIDTH_320: 2887 /* The behavior is not defined for 320 MHz channels */ 2888 WARN_ON(1); 2889 fallthrough; 2890 default: 2891 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2892 } 2893 2894 /* new center frequency segment 0 */ 2895 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2896 /* new center frequency segment 1 */ 2897 if (chandef->center_freq2) 2898 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2899 else 2900 *pos++ = 0; 2901 } 2902 2903 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2904 const struct cfg80211_chan_def *chandef) 2905 { 2906 struct ieee80211_vht_operation *vht_oper; 2907 2908 *pos++ = WLAN_EID_VHT_OPERATION; 2909 *pos++ = sizeof(struct ieee80211_vht_operation); 2910 vht_oper = (struct ieee80211_vht_operation *)pos; 2911 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2912 chandef->center_freq1); 2913 if (chandef->center_freq2) 2914 vht_oper->center_freq_seg1_idx = 2915 ieee80211_frequency_to_channel(chandef->center_freq2); 2916 else 2917 vht_oper->center_freq_seg1_idx = 0x00; 2918 2919 switch (chandef->width) { 2920 case NL80211_CHAN_WIDTH_160: 2921 /* 2922 * Convert 160 MHz channel width to new style as interop 2923 * workaround. 2924 */ 2925 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2926 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2927 if (chandef->chan->center_freq < chandef->center_freq1) 2928 vht_oper->center_freq_seg0_idx -= 8; 2929 else 2930 vht_oper->center_freq_seg0_idx += 8; 2931 break; 2932 case NL80211_CHAN_WIDTH_80P80: 2933 /* 2934 * Convert 80+80 MHz channel width to new style as interop 2935 * workaround. 2936 */ 2937 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2938 break; 2939 case NL80211_CHAN_WIDTH_80: 2940 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2941 break; 2942 case NL80211_CHAN_WIDTH_320: 2943 /* VHT information element should not be included on 6GHz */ 2944 WARN_ON(1); 2945 return pos; 2946 default: 2947 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2948 break; 2949 } 2950 2951 /* don't require special VHT peer rates */ 2952 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2953 2954 return pos + sizeof(struct ieee80211_vht_operation); 2955 } 2956 2957 u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef) 2958 { 2959 struct ieee80211_he_operation *he_oper; 2960 struct ieee80211_he_6ghz_oper *he_6ghz_op; 2961 struct cfg80211_chan_def he_chandef; 2962 u32 he_oper_params; 2963 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 2964 2965 if (chandef->chan->band == NL80211_BAND_6GHZ) 2966 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 2967 2968 *pos++ = WLAN_EID_EXTENSION; 2969 *pos++ = ie_len; 2970 *pos++ = WLAN_EID_EXT_HE_OPERATION; 2971 2972 he_oper_params = 0; 2973 he_oper_params |= u32_encode_bits(1023, /* disabled */ 2974 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 2975 he_oper_params |= u32_encode_bits(1, 2976 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 2977 he_oper_params |= u32_encode_bits(1, 2978 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 2979 if (chandef->chan->band == NL80211_BAND_6GHZ) 2980 he_oper_params |= u32_encode_bits(1, 2981 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 2982 2983 he_oper = (struct ieee80211_he_operation *)pos; 2984 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 2985 2986 /* don't require special HE peer rates */ 2987 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 2988 pos += sizeof(struct ieee80211_he_operation); 2989 2990 if (chandef->chan->band != NL80211_BAND_6GHZ) 2991 goto out; 2992 2993 cfg80211_chandef_create(&he_chandef, chandef->chan, NL80211_CHAN_NO_HT); 2994 he_chandef.center_freq1 = chandef->center_freq1; 2995 he_chandef.center_freq2 = chandef->center_freq2; 2996 he_chandef.width = chandef->width; 2997 2998 /* TODO add VHT operational */ 2999 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 3000 he_6ghz_op->minrate = 6; /* 6 Mbps */ 3001 he_6ghz_op->primary = 3002 ieee80211_frequency_to_channel(he_chandef.chan->center_freq); 3003 he_6ghz_op->ccfs0 = 3004 ieee80211_frequency_to_channel(he_chandef.center_freq1); 3005 if (he_chandef.center_freq2) 3006 he_6ghz_op->ccfs1 = 3007 ieee80211_frequency_to_channel(he_chandef.center_freq2); 3008 else 3009 he_6ghz_op->ccfs1 = 0; 3010 3011 switch (he_chandef.width) { 3012 case NL80211_CHAN_WIDTH_320: 3013 /* Downgrade EHT 320 MHz BW to 160 MHz for HE and set new 3014 * center_freq1 3015 */ 3016 ieee80211_chandef_downgrade(&he_chandef, NULL); 3017 he_6ghz_op->ccfs0 = 3018 ieee80211_frequency_to_channel(he_chandef.center_freq1); 3019 fallthrough; 3020 case NL80211_CHAN_WIDTH_160: 3021 /* Convert 160 MHz channel width to new style as interop 3022 * workaround. 3023 */ 3024 he_6ghz_op->control = 3025 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3026 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 3027 if (he_chandef.chan->center_freq < he_chandef.center_freq1) 3028 he_6ghz_op->ccfs0 -= 8; 3029 else 3030 he_6ghz_op->ccfs0 += 8; 3031 fallthrough; 3032 case NL80211_CHAN_WIDTH_80P80: 3033 he_6ghz_op->control = 3034 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 3035 break; 3036 case NL80211_CHAN_WIDTH_80: 3037 he_6ghz_op->control = 3038 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3039 break; 3040 case NL80211_CHAN_WIDTH_40: 3041 he_6ghz_op->control = 3042 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3043 break; 3044 default: 3045 he_6ghz_op->control = 3046 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3047 break; 3048 } 3049 3050 pos += sizeof(struct ieee80211_he_6ghz_oper); 3051 3052 out: 3053 return pos; 3054 } 3055 3056 u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef, 3057 const struct ieee80211_sta_eht_cap *eht_cap) 3058 3059 { 3060 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss = 3061 &eht_cap->eht_mcs_nss_supp.only_20mhz; 3062 struct ieee80211_eht_operation *eht_oper; 3063 struct ieee80211_eht_operation_info *eht_oper_info; 3064 u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional); 3065 u8 eht_oper_info_len = 3066 offsetof(struct ieee80211_eht_operation_info, optional); 3067 u8 chan_width = 0; 3068 3069 *pos++ = WLAN_EID_EXTENSION; 3070 *pos++ = 1 + eht_oper_len + eht_oper_info_len; 3071 *pos++ = WLAN_EID_EXT_EHT_OPERATION; 3072 3073 eht_oper = (struct ieee80211_eht_operation *)pos; 3074 3075 memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss)); 3076 eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT; 3077 pos += eht_oper_len; 3078 3079 eht_oper_info = 3080 (struct ieee80211_eht_operation_info *)eht_oper->optional; 3081 3082 eht_oper_info->ccfs0 = 3083 ieee80211_frequency_to_channel(chandef->center_freq1); 3084 if (chandef->center_freq2) 3085 eht_oper_info->ccfs1 = 3086 ieee80211_frequency_to_channel(chandef->center_freq2); 3087 else 3088 eht_oper_info->ccfs1 = 0; 3089 3090 switch (chandef->width) { 3091 case NL80211_CHAN_WIDTH_320: 3092 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ; 3093 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3094 if (chandef->chan->center_freq < chandef->center_freq1) 3095 eht_oper_info->ccfs0 -= 16; 3096 else 3097 eht_oper_info->ccfs0 += 16; 3098 break; 3099 case NL80211_CHAN_WIDTH_160: 3100 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3101 if (chandef->chan->center_freq < chandef->center_freq1) 3102 eht_oper_info->ccfs0 -= 8; 3103 else 3104 eht_oper_info->ccfs0 += 8; 3105 fallthrough; 3106 case NL80211_CHAN_WIDTH_80P80: 3107 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ; 3108 break; 3109 case NL80211_CHAN_WIDTH_80: 3110 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ; 3111 break; 3112 case NL80211_CHAN_WIDTH_40: 3113 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ; 3114 break; 3115 default: 3116 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ; 3117 break; 3118 } 3119 eht_oper_info->control = chan_width; 3120 pos += eht_oper_info_len; 3121 3122 /* TODO: eht_oper_info->optional */ 3123 3124 return pos; 3125 } 3126 3127 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3128 struct cfg80211_chan_def *chandef) 3129 { 3130 enum nl80211_channel_type channel_type; 3131 3132 if (!ht_oper) 3133 return false; 3134 3135 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3136 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3137 channel_type = NL80211_CHAN_HT20; 3138 break; 3139 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3140 channel_type = NL80211_CHAN_HT40PLUS; 3141 break; 3142 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3143 channel_type = NL80211_CHAN_HT40MINUS; 3144 break; 3145 default: 3146 return false; 3147 } 3148 3149 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3150 return true; 3151 } 3152 3153 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3154 const struct ieee80211_vht_operation *oper, 3155 const struct ieee80211_ht_operation *htop, 3156 struct cfg80211_chan_def *chandef) 3157 { 3158 struct cfg80211_chan_def new = *chandef; 3159 int cf0, cf1; 3160 int ccfs0, ccfs1, ccfs2; 3161 int ccf0, ccf1; 3162 u32 vht_cap; 3163 bool support_80_80 = false; 3164 bool support_160 = false; 3165 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3166 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3167 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3168 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3169 3170 if (!oper || !htop) 3171 return false; 3172 3173 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3174 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3175 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3176 support_80_80 = ((vht_cap & 3177 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3178 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3179 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3180 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3181 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3182 ccfs0 = oper->center_freq_seg0_idx; 3183 ccfs1 = oper->center_freq_seg1_idx; 3184 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3185 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3186 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3187 3188 ccf0 = ccfs0; 3189 3190 /* if not supported, parse as though we didn't understand it */ 3191 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3192 ext_nss_bw_supp = 0; 3193 3194 /* 3195 * Cf. IEEE 802.11-2020 Table 9-272 - Setting of the Supported Channel 3196 * Width Set subfield and Extended NSS BW Support subfield at a STA 3197 * transmitting the VHT Capabilities Information field 3198 * 3199 * We really just consider that because it's inefficient to connect 3200 * at a higher bandwidth than we'll actually be able to use. 3201 */ 3202 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3203 default: 3204 case 0x00: 3205 ccf1 = 0; 3206 support_160 = false; 3207 support_80_80 = false; 3208 break; 3209 case 0x01: 3210 support_80_80 = false; 3211 fallthrough; 3212 case 0x02: 3213 case 0x03: 3214 ccf1 = ccfs2; 3215 break; 3216 case 0x10: 3217 ccf1 = ccfs1; 3218 break; 3219 case 0x11: 3220 case 0x12: 3221 if (!ccfs1) 3222 ccf1 = ccfs2; 3223 else 3224 ccf1 = ccfs1; 3225 break; 3226 case 0x13: 3227 case 0x20: 3228 case 0x23: 3229 ccf1 = ccfs1; 3230 break; 3231 } 3232 3233 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3234 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3235 3236 switch (oper->chan_width) { 3237 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3238 /* just use HT information directly */ 3239 break; 3240 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3241 new.width = NL80211_CHAN_WIDTH_80; 3242 new.center_freq1 = cf0; 3243 /* If needed, adjust based on the newer interop workaround. */ 3244 if (ccf1) { 3245 unsigned int diff; 3246 3247 diff = abs(ccf1 - ccf0); 3248 if ((diff == 8) && support_160) { 3249 new.width = NL80211_CHAN_WIDTH_160; 3250 new.center_freq1 = cf1; 3251 } else if ((diff > 8) && support_80_80) { 3252 new.width = NL80211_CHAN_WIDTH_80P80; 3253 new.center_freq2 = cf1; 3254 } 3255 } 3256 break; 3257 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3258 /* deprecated encoding */ 3259 new.width = NL80211_CHAN_WIDTH_160; 3260 new.center_freq1 = cf0; 3261 break; 3262 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3263 /* deprecated encoding */ 3264 new.width = NL80211_CHAN_WIDTH_80P80; 3265 new.center_freq1 = cf0; 3266 new.center_freq2 = cf1; 3267 break; 3268 default: 3269 return false; 3270 } 3271 3272 if (!cfg80211_chandef_valid(&new)) 3273 return false; 3274 3275 *chandef = new; 3276 return true; 3277 } 3278 3279 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info, 3280 struct cfg80211_chan_def *chandef) 3281 { 3282 chandef->center_freq1 = 3283 ieee80211_channel_to_frequency(info->ccfs0, 3284 chandef->chan->band); 3285 3286 switch (u8_get_bits(info->control, 3287 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3288 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3289 chandef->width = NL80211_CHAN_WIDTH_20; 3290 break; 3291 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3292 chandef->width = NL80211_CHAN_WIDTH_40; 3293 break; 3294 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3295 chandef->width = NL80211_CHAN_WIDTH_80; 3296 break; 3297 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3298 chandef->width = NL80211_CHAN_WIDTH_160; 3299 chandef->center_freq1 = 3300 ieee80211_channel_to_frequency(info->ccfs1, 3301 chandef->chan->band); 3302 break; 3303 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3304 chandef->width = NL80211_CHAN_WIDTH_320; 3305 chandef->center_freq1 = 3306 ieee80211_channel_to_frequency(info->ccfs1, 3307 chandef->chan->band); 3308 break; 3309 } 3310 } 3311 3312 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local, 3313 const struct ieee80211_he_operation *he_oper, 3314 const struct ieee80211_eht_operation *eht_oper, 3315 struct cfg80211_chan_def *chandef) 3316 { 3317 struct cfg80211_chan_def he_chandef = *chandef; 3318 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3319 u32 freq; 3320 3321 if (chandef->chan->band != NL80211_BAND_6GHZ) 3322 return true; 3323 3324 if (!he_oper) 3325 return false; 3326 3327 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3328 if (!he_6ghz_oper) 3329 return false; 3330 3331 /* 3332 * The EHT operation IE does not contain the primary channel so the 3333 * primary channel frequency should be taken from the 6 GHz operation 3334 * information. 3335 */ 3336 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3337 NL80211_BAND_6GHZ); 3338 he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq); 3339 3340 if (!he_chandef.chan) 3341 return false; 3342 3343 if (!eht_oper || 3344 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3345 switch (u8_get_bits(he_6ghz_oper->control, 3346 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3347 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3348 he_chandef.width = NL80211_CHAN_WIDTH_20; 3349 break; 3350 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3351 he_chandef.width = NL80211_CHAN_WIDTH_40; 3352 break; 3353 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3354 he_chandef.width = NL80211_CHAN_WIDTH_80; 3355 break; 3356 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3357 he_chandef.width = NL80211_CHAN_WIDTH_80; 3358 if (!he_6ghz_oper->ccfs1) 3359 break; 3360 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) 3361 he_chandef.width = NL80211_CHAN_WIDTH_160; 3362 else 3363 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3364 break; 3365 } 3366 3367 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3368 he_chandef.center_freq1 = 3369 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3370 NL80211_BAND_6GHZ); 3371 } else { 3372 he_chandef.center_freq1 = 3373 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3374 NL80211_BAND_6GHZ); 3375 he_chandef.center_freq2 = 3376 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3377 NL80211_BAND_6GHZ); 3378 } 3379 } else { 3380 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 3381 &he_chandef); 3382 he_chandef.punctured = 3383 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 3384 } 3385 3386 if (!cfg80211_chandef_valid(&he_chandef)) 3387 return false; 3388 3389 *chandef = he_chandef; 3390 3391 return true; 3392 } 3393 3394 bool ieee80211_chandef_s1g_oper(struct ieee80211_local *local, 3395 const struct ieee80211_s1g_oper_ie *oper, 3396 struct cfg80211_chan_def *chandef) 3397 { 3398 u32 oper_khz, pri_1mhz_khz, pri_2mhz_khz; 3399 3400 if (!oper) 3401 return false; 3402 3403 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3404 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3405 chandef->width = NL80211_CHAN_WIDTH_1; 3406 break; 3407 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3408 chandef->width = NL80211_CHAN_WIDTH_2; 3409 break; 3410 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3411 chandef->width = NL80211_CHAN_WIDTH_4; 3412 break; 3413 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3414 chandef->width = NL80211_CHAN_WIDTH_8; 3415 break; 3416 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3417 chandef->width = NL80211_CHAN_WIDTH_16; 3418 break; 3419 default: 3420 return false; 3421 } 3422 3423 chandef->s1g_primary_2mhz = false; 3424 3425 switch (u8_get_bits(oper->ch_width, S1G_OPER_CH_WIDTH_PRIMARY)) { 3426 case IEEE80211_S1G_PRI_CHANWIDTH_1MHZ: 3427 pri_1mhz_khz = ieee80211_channel_to_freq_khz( 3428 oper->primary_ch, NL80211_BAND_S1GHZ); 3429 break; 3430 case IEEE80211_S1G_PRI_CHANWIDTH_2MHZ: 3431 chandef->s1g_primary_2mhz = true; 3432 pri_2mhz_khz = ieee80211_channel_to_freq_khz( 3433 oper->primary_ch, NL80211_BAND_S1GHZ); 3434 3435 if (u8_get_bits(oper->ch_width, S1G_OPER_CH_PRIMARY_LOCATION) == 3436 S1G_2M_PRIMARY_LOCATION_LOWER) 3437 pri_1mhz_khz = pri_2mhz_khz - 500; 3438 else 3439 pri_1mhz_khz = pri_2mhz_khz + 500; 3440 break; 3441 default: 3442 return false; 3443 } 3444 3445 oper_khz = ieee80211_channel_to_freq_khz(oper->oper_ch, 3446 NL80211_BAND_S1GHZ); 3447 chandef->center_freq1 = KHZ_TO_MHZ(oper_khz); 3448 chandef->freq1_offset = oper_khz % 1000; 3449 chandef->chan = 3450 ieee80211_get_channel_khz(local->hw.wiphy, pri_1mhz_khz); 3451 3452 return chandef->chan; 3453 } 3454 3455 int ieee80211_put_srates_elem(struct sk_buff *skb, 3456 const struct ieee80211_supported_band *sband, 3457 u32 basic_rates, u32 masked_rates, 3458 u8 element_id) 3459 { 3460 u8 i, rates, skip; 3461 3462 rates = 0; 3463 for (i = 0; i < sband->n_bitrates; i++) { 3464 if (masked_rates & BIT(i)) 3465 continue; 3466 rates++; 3467 } 3468 3469 if (element_id == WLAN_EID_SUPP_RATES) { 3470 rates = min_t(u8, rates, 8); 3471 skip = 0; 3472 } else { 3473 skip = 8; 3474 if (rates <= skip) 3475 return 0; 3476 rates -= skip; 3477 } 3478 3479 if (skb_tailroom(skb) < rates + 2) 3480 return -ENOBUFS; 3481 3482 skb_put_u8(skb, element_id); 3483 skb_put_u8(skb, rates); 3484 3485 for (i = 0; i < sband->n_bitrates && rates; i++) { 3486 int rate; 3487 u8 basic; 3488 3489 if (masked_rates & BIT(i)) 3490 continue; 3491 3492 if (skip > 0) { 3493 skip--; 3494 continue; 3495 } 3496 3497 basic = basic_rates & BIT(i) ? 0x80 : 0; 3498 3499 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 3500 skb_put_u8(skb, basic | (u8)rate); 3501 rates--; 3502 } 3503 3504 WARN(rates > 0, "rates confused: rates:%d, element:%d\n", 3505 rates, element_id); 3506 3507 return 0; 3508 } 3509 3510 int ieee80211_ave_rssi(struct ieee80211_vif *vif, int link_id) 3511 { 3512 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3513 struct ieee80211_link_data *link_data; 3514 3515 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3516 return 0; 3517 3518 if (link_id < 0) 3519 link_data = &sdata->deflink; 3520 else 3521 link_data = wiphy_dereference(sdata->local->hw.wiphy, 3522 sdata->link[link_id]); 3523 3524 if (WARN_ON_ONCE(!link_data)) 3525 return -99; 3526 3527 return -ewma_beacon_signal_read(&link_data->u.mgd.ave_beacon_signal); 3528 } 3529 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3530 3531 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3532 { 3533 if (!mcs) 3534 return 1; 3535 3536 /* TODO: consider rx_highest */ 3537 3538 if (mcs->rx_mask[3]) 3539 return 4; 3540 if (mcs->rx_mask[2]) 3541 return 3; 3542 if (mcs->rx_mask[1]) 3543 return 2; 3544 return 1; 3545 } 3546 3547 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_hw *hw, 3548 struct ieee80211_rx_status *status, 3549 unsigned int mpdu_len, 3550 unsigned int mpdu_offset) 3551 { 3552 u64 ts = status->mactime; 3553 bool mactime_plcp_start; 3554 struct rate_info ri; 3555 u16 rate; 3556 u8 n_ltf; 3557 3558 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3559 return 0; 3560 3561 mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) == 3562 RX_FLAG_MACTIME_PLCP_START; 3563 3564 memset(&ri, 0, sizeof(ri)); 3565 3566 ri.bw = status->bw; 3567 3568 /* Fill cfg80211 rate info */ 3569 switch (status->encoding) { 3570 case RX_ENC_EHT: 3571 ri.flags |= RATE_INFO_FLAGS_EHT_MCS; 3572 ri.mcs = status->rate_idx; 3573 ri.nss = status->nss; 3574 ri.eht_ru_alloc = status->eht.ru; 3575 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3576 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3577 /* TODO/FIXME: is this right? handle other PPDUs */ 3578 if (mactime_plcp_start) { 3579 mpdu_offset += 2; 3580 ts += 36; 3581 } 3582 break; 3583 case RX_ENC_HE: 3584 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3585 ri.mcs = status->rate_idx; 3586 ri.nss = status->nss; 3587 ri.he_ru_alloc = status->he_ru; 3588 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3589 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3590 3591 /* 3592 * See P802.11ax_D6.0, section 27.3.4 for 3593 * VHT PPDU format. 3594 */ 3595 if (mactime_plcp_start) { 3596 mpdu_offset += 2; 3597 ts += 36; 3598 3599 /* 3600 * TODO: 3601 * For HE MU PPDU, add the HE-SIG-B. 3602 * For HE ER PPDU, add 8us for the HE-SIG-A. 3603 * For HE TB PPDU, add 4us for the HE-STF. 3604 * Add the HE-LTF durations - variable. 3605 */ 3606 } 3607 3608 break; 3609 case RX_ENC_HT: 3610 ri.mcs = status->rate_idx; 3611 ri.flags |= RATE_INFO_FLAGS_MCS; 3612 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3613 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3614 3615 /* 3616 * See P802.11REVmd_D3.0, section 19.3.2 for 3617 * HT PPDU format. 3618 */ 3619 if (mactime_plcp_start) { 3620 mpdu_offset += 2; 3621 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3622 ts += 24; 3623 else 3624 ts += 32; 3625 3626 /* 3627 * Add Data HT-LTFs per streams 3628 * TODO: add Extension HT-LTFs, 4us per LTF 3629 */ 3630 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3631 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3632 ts += n_ltf * 4; 3633 } 3634 3635 break; 3636 case RX_ENC_VHT: 3637 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3638 ri.mcs = status->rate_idx; 3639 ri.nss = status->nss; 3640 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3641 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3642 3643 /* 3644 * See P802.11REVmd_D3.0, section 21.3.2 for 3645 * VHT PPDU format. 3646 */ 3647 if (mactime_plcp_start) { 3648 mpdu_offset += 2; 3649 ts += 36; 3650 3651 /* 3652 * Add VHT-LTFs per streams 3653 */ 3654 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3655 ri.nss + 1 : ri.nss; 3656 ts += 4 * n_ltf; 3657 } 3658 3659 break; 3660 default: 3661 WARN_ON(1); 3662 fallthrough; 3663 case RX_ENC_LEGACY: { 3664 struct ieee80211_supported_band *sband; 3665 3666 sband = hw->wiphy->bands[status->band]; 3667 ri.legacy = sband->bitrates[status->rate_idx].bitrate; 3668 3669 if (mactime_plcp_start) { 3670 if (status->band == NL80211_BAND_5GHZ) { 3671 ts += 20; 3672 mpdu_offset += 2; 3673 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3674 ts += 96; 3675 } else { 3676 ts += 192; 3677 } 3678 } 3679 break; 3680 } 3681 } 3682 3683 rate = cfg80211_calculate_bitrate(&ri); 3684 if (WARN_ONCE(!rate, 3685 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3686 (unsigned long long)status->flag, status->rate_idx, 3687 status->nss)) 3688 return 0; 3689 3690 /* rewind from end of MPDU */ 3691 if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END) 3692 ts -= mpdu_len * 8 * 10 / rate; 3693 3694 ts += mpdu_offset * 8 * 10 / rate; 3695 3696 return ts; 3697 } 3698 EXPORT_SYMBOL_GPL(ieee80211_calculate_rx_timestamp); 3699 3700 /* Cancel CAC for the interfaces under the specified @local. If @ctx is 3701 * also provided, only the interfaces using that ctx will be canceled. 3702 */ 3703 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local, 3704 struct ieee80211_chanctx *ctx) 3705 { 3706 struct ieee80211_sub_if_data *sdata; 3707 struct cfg80211_chan_def chandef; 3708 struct ieee80211_link_data *link; 3709 struct ieee80211_chanctx_conf *chanctx_conf; 3710 unsigned int link_id; 3711 3712 lockdep_assert_wiphy(local->hw.wiphy); 3713 3714 list_for_each_entry(sdata, &local->interfaces, list) { 3715 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3716 link_id++) { 3717 link = sdata_dereference(sdata->link[link_id], 3718 sdata); 3719 if (!link) 3720 continue; 3721 3722 chanctx_conf = sdata_dereference(link->conf->chanctx_conf, 3723 sdata); 3724 if (ctx && &ctx->conf != chanctx_conf) 3725 continue; 3726 3727 wiphy_hrtimer_work_cancel(local->hw.wiphy, 3728 &link->dfs_cac_timer_work); 3729 3730 if (!sdata->wdev.links[link_id].cac_started) 3731 continue; 3732 3733 chandef = link->conf->chanreq.oper; 3734 ieee80211_link_release_channel(link); 3735 cfg80211_cac_event(sdata->dev, &chandef, 3736 NL80211_RADAR_CAC_ABORTED, 3737 GFP_KERNEL, link_id); 3738 } 3739 } 3740 } 3741 3742 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy, 3743 struct wiphy_work *work) 3744 { 3745 struct ieee80211_local *local = 3746 container_of(work, struct ieee80211_local, radar_detected_work); 3747 struct cfg80211_chan_def chandef; 3748 struct ieee80211_chanctx *ctx, *tmp; 3749 3750 lockdep_assert_wiphy(local->hw.wiphy); 3751 3752 list_for_each_entry_safe(ctx, tmp, &local->chanctx_list, list) { 3753 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3754 continue; 3755 3756 if (!ctx->radar_detected) 3757 continue; 3758 3759 ctx->radar_detected = false; 3760 3761 chandef = ctx->conf.def; 3762 3763 ieee80211_dfs_cac_cancel(local, ctx); 3764 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3765 } 3766 } 3767 3768 static void 3769 ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw, 3770 struct ieee80211_chanctx_conf *chanctx_conf, 3771 void *data) 3772 { 3773 struct ieee80211_chanctx *ctx = 3774 container_of(chanctx_conf, struct ieee80211_chanctx, 3775 conf); 3776 3777 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3778 return; 3779 3780 if (data && data != chanctx_conf) 3781 return; 3782 3783 ctx->radar_detected = true; 3784 } 3785 3786 void ieee80211_radar_detected(struct ieee80211_hw *hw, 3787 struct ieee80211_chanctx_conf *chanctx_conf) 3788 { 3789 struct ieee80211_local *local = hw_to_local(hw); 3790 3791 trace_api_radar_detected(local); 3792 3793 ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator, 3794 chanctx_conf); 3795 3796 wiphy_work_queue(hw->wiphy, &local->radar_detected_work); 3797 } 3798 EXPORT_SYMBOL(ieee80211_radar_detected); 3799 3800 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c, 3801 struct ieee80211_conn_settings *conn) 3802 { 3803 enum nl80211_chan_width new_primary_width; 3804 struct ieee80211_conn_settings _ignored = {}; 3805 3806 /* allow passing NULL if caller doesn't care */ 3807 if (!conn) 3808 conn = &_ignored; 3809 3810 again: 3811 /* no-HT indicates nothing to do */ 3812 new_primary_width = NL80211_CHAN_WIDTH_20_NOHT; 3813 3814 switch (c->width) { 3815 default: 3816 case NL80211_CHAN_WIDTH_20_NOHT: 3817 WARN_ON_ONCE(1); 3818 fallthrough; 3819 case NL80211_CHAN_WIDTH_20: 3820 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3821 conn->mode = IEEE80211_CONN_MODE_LEGACY; 3822 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3823 c->punctured = 0; 3824 break; 3825 case NL80211_CHAN_WIDTH_40: 3826 c->width = NL80211_CHAN_WIDTH_20; 3827 c->center_freq1 = c->chan->center_freq; 3828 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3829 conn->mode = IEEE80211_CONN_MODE_HT; 3830 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3831 c->punctured = 0; 3832 break; 3833 case NL80211_CHAN_WIDTH_80: 3834 new_primary_width = NL80211_CHAN_WIDTH_40; 3835 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3836 conn->mode = IEEE80211_CONN_MODE_HT; 3837 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40; 3838 break; 3839 case NL80211_CHAN_WIDTH_80P80: 3840 c->center_freq2 = 0; 3841 c->width = NL80211_CHAN_WIDTH_80; 3842 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3843 break; 3844 case NL80211_CHAN_WIDTH_160: 3845 new_primary_width = NL80211_CHAN_WIDTH_80; 3846 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3847 break; 3848 case NL80211_CHAN_WIDTH_320: 3849 new_primary_width = NL80211_CHAN_WIDTH_160; 3850 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 3851 break; 3852 case NL80211_CHAN_WIDTH_1: 3853 case NL80211_CHAN_WIDTH_2: 3854 case NL80211_CHAN_WIDTH_4: 3855 case NL80211_CHAN_WIDTH_8: 3856 case NL80211_CHAN_WIDTH_16: 3857 WARN_ON_ONCE(1); 3858 /* keep c->width */ 3859 conn->mode = IEEE80211_CONN_MODE_S1G; 3860 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3861 break; 3862 } 3863 3864 if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) { 3865 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width, 3866 &c->punctured); 3867 c->width = new_primary_width; 3868 } 3869 3870 /* whatever we do, downgrading removes NPCA */ 3871 c->npca_chan = NULL; 3872 c->npca_punctured = 0; 3873 3874 /* 3875 * With an 80 MHz channel, we might have the puncturing in the primary 3876 * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width. 3877 * In that case, downgrade again. 3878 */ 3879 if (!cfg80211_chandef_valid(c) && c->punctured) 3880 goto again; 3881 3882 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3883 } 3884 3885 enum nl80211_chan_width 3886 ieee80211_sta_rx_bw_to_chan_width(enum ieee80211_sta_rx_bandwidth bw) 3887 { 3888 switch (bw) { 3889 case IEEE80211_STA_RX_BW_20: 3890 return NL80211_CHAN_WIDTH_20; 3891 case IEEE80211_STA_RX_BW_40: 3892 return NL80211_CHAN_WIDTH_40; 3893 case IEEE80211_STA_RX_BW_80: 3894 return NL80211_CHAN_WIDTH_80; 3895 case IEEE80211_STA_RX_BW_160: 3896 return NL80211_CHAN_WIDTH_160; 3897 case IEEE80211_STA_RX_BW_320: 3898 return NL80211_CHAN_WIDTH_320; 3899 default: 3900 return NL80211_CHAN_WIDTH_20; 3901 } 3902 } 3903 3904 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3905 struct cfg80211_csa_settings *csa_settings) 3906 { 3907 int hdr_len = IEEE80211_MIN_ACTION_SIZE(chan_switch); 3908 struct sk_buff *skb; 3909 struct ieee80211_mgmt *mgmt; 3910 struct ieee80211_local *local = sdata->local; 3911 int freq; 3912 u8 *pos; 3913 3914 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3915 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3916 return -EOPNOTSUPP; 3917 3918 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3919 5 + /* channel switch announcement element */ 3920 3 + /* secondary channel offset element */ 3921 5 + /* wide bandwidth channel switch announcement */ 3922 8); /* mesh channel switch parameters element */ 3923 if (!skb) 3924 return -ENOMEM; 3925 3926 skb_reserve(skb, local->tx_headroom); 3927 mgmt = skb_put_zero(skb, hdr_len); 3928 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3929 IEEE80211_STYPE_ACTION); 3930 3931 eth_broadcast_addr(mgmt->da); 3932 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3933 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3934 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3935 } else { 3936 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3937 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3938 } 3939 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3940 mgmt->u.action.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3941 pos = skb_put(skb, 5); 3942 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3943 *pos++ = 3; /* IE length */ 3944 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3945 freq = csa_settings->chandef.chan->center_freq; 3946 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3947 *pos++ = csa_settings->count; /* count */ 3948 3949 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3950 enum nl80211_channel_type ch_type; 3951 3952 skb_put(skb, 3); 3953 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3954 *pos++ = 1; /* IE length */ 3955 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3956 if (ch_type == NL80211_CHAN_HT40PLUS) 3957 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3958 else 3959 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3960 } 3961 3962 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3963 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3964 3965 skb_put(skb, 8); 3966 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3967 *pos++ = 6; /* IE length */ 3968 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3969 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3970 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3971 *pos++ |= csa_settings->block_tx ? 3972 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3973 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3974 pos += 2; 3975 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3976 pos += 2; 3977 } 3978 3979 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3980 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3981 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3982 skb_put(skb, 5); 3983 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3984 } 3985 3986 ieee80211_tx_skb(sdata, skb); 3987 return 0; 3988 } 3989 3990 static bool 3991 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3992 { 3993 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3994 int skip; 3995 3996 if (end > 0) 3997 return false; 3998 3999 /* One shot NOA */ 4000 if (data->count[i] == 1) 4001 return false; 4002 4003 if (data->desc[i].interval == 0) 4004 return false; 4005 4006 /* End time is in the past, check for repetitions */ 4007 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 4008 if (data->count[i] < 255) { 4009 if (data->count[i] <= skip) { 4010 data->count[i] = 0; 4011 return false; 4012 } 4013 4014 data->count[i] -= skip; 4015 } 4016 4017 data->desc[i].start += skip * data->desc[i].interval; 4018 4019 return true; 4020 } 4021 4022 static bool 4023 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 4024 s32 *offset) 4025 { 4026 bool ret = false; 4027 int i; 4028 4029 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4030 s32 cur; 4031 4032 if (!data->count[i]) 4033 continue; 4034 4035 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4036 ret = true; 4037 4038 cur = data->desc[i].start - tsf; 4039 if (cur > *offset) 4040 continue; 4041 4042 cur = data->desc[i].start + data->desc[i].duration - tsf; 4043 if (cur > *offset) 4044 *offset = cur; 4045 } 4046 4047 return ret; 4048 } 4049 4050 static u32 4051 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4052 { 4053 s32 offset = 0; 4054 int tries = 0; 4055 /* 4056 * arbitrary limit, used to avoid infinite loops when combined NoA 4057 * descriptors cover the full time period. 4058 */ 4059 int max_tries = 5; 4060 4061 ieee80211_extend_absent_time(data, tsf, &offset); 4062 do { 4063 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4064 break; 4065 4066 tries++; 4067 } while (tries < max_tries); 4068 4069 return offset; 4070 } 4071 4072 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4073 { 4074 u32 next_offset = BIT(31) - 1; 4075 int i; 4076 4077 data->absent = 0; 4078 data->has_next_tsf = false; 4079 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4080 s32 start; 4081 4082 if (!data->count[i]) 4083 continue; 4084 4085 ieee80211_extend_noa_desc(data, tsf, i); 4086 start = data->desc[i].start - tsf; 4087 if (start <= 0) 4088 data->absent |= BIT(i); 4089 4090 if (next_offset > start) 4091 next_offset = start; 4092 4093 data->has_next_tsf = true; 4094 } 4095 4096 if (data->absent) 4097 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4098 4099 data->next_tsf = tsf + next_offset; 4100 } 4101 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4102 4103 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4104 struct ieee80211_noa_data *data, u32 tsf) 4105 { 4106 int ret = 0; 4107 int i; 4108 4109 memset(data, 0, sizeof(*data)); 4110 4111 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4112 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4113 4114 if (!desc->count || !desc->duration) 4115 continue; 4116 4117 data->count[i] = desc->count; 4118 data->desc[i].start = le32_to_cpu(desc->start_time); 4119 data->desc[i].duration = le32_to_cpu(desc->duration); 4120 data->desc[i].interval = le32_to_cpu(desc->interval); 4121 4122 if (data->count[i] > 1 && 4123 data->desc[i].interval < data->desc[i].duration) 4124 continue; 4125 4126 ieee80211_extend_noa_desc(data, tsf, i); 4127 ret++; 4128 } 4129 4130 if (ret) 4131 ieee80211_update_p2p_noa(data, tsf); 4132 4133 return ret; 4134 } 4135 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4136 4137 void ieee80211_recalc_dtim(struct ieee80211_sub_if_data *sdata, u64 tsf) 4138 { 4139 u64 dtim_count = 0; 4140 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4141 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4142 struct ps_data *ps; 4143 u8 bcns_from_dtim; 4144 4145 if (tsf == -1ULL || !beacon_int || !dtim_period) 4146 return; 4147 4148 if (sdata->vif.type == NL80211_IFTYPE_AP || 4149 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4150 if (!sdata->bss) 4151 return; 4152 4153 ps = &sdata->bss->ps; 4154 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4155 ps = &sdata->u.mesh.ps; 4156 } else { 4157 return; 4158 } 4159 4160 /* 4161 * actually finds last dtim_count, mac80211 will update in 4162 * __beacon_add_tim(). 4163 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4164 */ 4165 do_div(tsf, beacon_int); 4166 bcns_from_dtim = do_div(tsf, dtim_period); 4167 /* just had a DTIM */ 4168 if (!bcns_from_dtim) 4169 dtim_count = 0; 4170 else 4171 dtim_count = dtim_period - bcns_from_dtim; 4172 4173 ps->dtim_count = dtim_count; 4174 } 4175 4176 /* 4177 * Given a long beacon period, calculate the current index into 4178 * that period to determine the number of TSBTTs until the next TBTT. 4179 * It is completely valid to have a short beacon period that differs 4180 * from the dtim period (i.e a TBTT thats not a DTIM). 4181 */ 4182 void ieee80211_recalc_sb_count(struct ieee80211_sub_if_data *sdata, u64 tsf) 4183 { 4184 u32 sb_idx; 4185 struct ps_data *ps = &sdata->bss->ps; 4186 u8 lb_period = sdata->vif.bss_conf.s1g_long_beacon_period; 4187 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4188 4189 /* No mesh / IBSS support for short beaconing */ 4190 if (tsf == -1ULL || !lb_period || 4191 (sdata->vif.type != NL80211_IFTYPE_AP && 4192 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) 4193 return; 4194 4195 /* find the current TSBTT index in our lb_period */ 4196 do_div(tsf, beacon_int); 4197 sb_idx = do_div(tsf, lb_period); 4198 4199 /* num TSBTTs until the next TBTT */ 4200 ps->sb_count = sb_idx ? lb_period - sb_idx : 0; 4201 } 4202 4203 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4204 struct ieee80211_chanctx *ctx) 4205 { 4206 struct ieee80211_link_data *link; 4207 u8 radar_detect = 0; 4208 4209 lockdep_assert_wiphy(local->hw.wiphy); 4210 4211 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4212 return 0; 4213 4214 for_each_sdata_link(local, link) { 4215 if (rcu_access_pointer(link->conf->chanctx_conf) == &ctx->conf) { 4216 /* 4217 * An in-place reservation context should not have any 4218 * assigned links until it replaces the other context. 4219 */ 4220 WARN_ON(ctx->replace_state == 4221 IEEE80211_CHANCTX_REPLACES_OTHER); 4222 4223 if (link->radar_required) 4224 radar_detect |= 4225 BIT(link->conf->chanreq.oper.width); 4226 } 4227 4228 if (link->reserved_chanctx == ctx && 4229 link->reserved_radar_required) 4230 radar_detect |= BIT(link->reserved.oper.width); 4231 } 4232 4233 return radar_detect; 4234 } 4235 4236 bool ieee80211_is_radio_idx_in_scan_req(struct wiphy *wiphy, 4237 struct cfg80211_scan_request *scan_req, 4238 int radio_idx) 4239 { 4240 struct ieee80211_channel *chan; 4241 int i, chan_radio_idx; 4242 4243 for (i = 0; i < scan_req->n_channels; i++) { 4244 chan = scan_req->channels[i]; 4245 chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan); 4246 4247 /* The radio index either matched successfully, or an error 4248 * occurred. For example, if radio-level information is 4249 * missing, the same error value is returned. This 4250 * typically implies a single-radio setup, in which case 4251 * the operation should not be allowed. 4252 */ 4253 if (chan_radio_idx == radio_idx) 4254 return true; 4255 } 4256 4257 return false; 4258 } 4259 4260 static u32 4261 __ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata) 4262 { 4263 struct ieee80211_bss_conf *link_conf; 4264 struct ieee80211_chanctx_conf *conf; 4265 unsigned int link_id; 4266 u32 mask = 0; 4267 4268 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 4269 conf = sdata_dereference(link_conf->chanctx_conf, sdata); 4270 if (!conf || conf->radio_idx < 0) 4271 continue; 4272 4273 mask |= BIT(conf->radio_idx); 4274 } 4275 4276 return mask; 4277 } 4278 4279 u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev) 4280 { 4281 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 4282 4283 return __ieee80211_get_radio_mask(sdata); 4284 } 4285 4286 static bool 4287 ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx) 4288 { 4289 if (radio_idx < 0) 4290 return true; 4291 4292 return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx); 4293 } 4294 4295 static int 4296 ieee80211_fill_ifcomb_params(struct ieee80211_local *local, 4297 struct iface_combination_params *params, 4298 const struct cfg80211_chan_def *chandef, 4299 struct ieee80211_sub_if_data *sdata, 4300 bool (*chanctx_filter)(struct ieee80211_chanctx *ctx, 4301 void *filter_data), 4302 void *filter_data) 4303 { 4304 struct ieee80211_sub_if_data *sdata_iter; 4305 struct ieee80211_chanctx *ctx; 4306 int total = !!sdata; 4307 4308 list_for_each_entry(ctx, &local->chanctx_list, list) { 4309 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4310 continue; 4311 4312 if (params->radio_idx >= 0 && 4313 ctx->conf.radio_idx != params->radio_idx) 4314 continue; 4315 4316 params->radar_detect |= 4317 ieee80211_chanctx_radar_detect(local, ctx); 4318 4319 if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE && 4320 cfg80211_chandef_compatible(chandef, &ctx->conf.def)) 4321 continue; 4322 4323 if (chanctx_filter && 4324 chanctx_filter(ctx, filter_data)) 4325 continue; 4326 4327 params->num_different_channels++; 4328 } 4329 4330 list_for_each_entry(sdata_iter, &local->interfaces, list) { 4331 struct wireless_dev *wdev_iter; 4332 4333 wdev_iter = &sdata_iter->wdev; 4334 4335 if (sdata_iter == sdata || 4336 !ieee80211_sdata_running(sdata_iter) || 4337 cfg80211_iftype_allowed(local->hw.wiphy, 4338 wdev_iter->iftype, 0, 1)) 4339 continue; 4340 4341 if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx)) 4342 continue; 4343 4344 params->iftype_num[wdev_iter->iftype]++; 4345 total++; 4346 } 4347 4348 return total; 4349 } 4350 4351 int ieee80211_check_combinations_ext(struct ieee80211_sub_if_data *sdata, 4352 struct ieee80211_check_combinations_data *data) 4353 { 4354 const struct cfg80211_chan_def *chandef = data->chandef; 4355 bool shared = data->chanmode == IEEE80211_CHANCTX_SHARED; 4356 struct ieee80211_local *local = sdata->local; 4357 enum nl80211_iftype iftype = sdata->wdev.iftype; 4358 struct iface_combination_params params = { 4359 .radar_detect = data->radar_detect, 4360 .radio_idx = data->radio_idx, 4361 }; 4362 int total; 4363 4364 lockdep_assert_wiphy(local->hw.wiphy); 4365 4366 if (WARN_ON(hweight32(data->radar_detect) > 1)) 4367 return -EINVAL; 4368 4369 if (WARN_ON(chandef && data->chanmode == IEEE80211_CHANCTX_SHARED && 4370 !chandef->chan)) 4371 return -EINVAL; 4372 4373 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4374 return -EINVAL; 4375 4376 if (sdata->vif.type == NL80211_IFTYPE_AP || 4377 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4378 /* 4379 * always passing this is harmless, since it'll be the 4380 * same value that cfg80211 finds if it finds the same 4381 * interface ... and that's always allowed 4382 */ 4383 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4384 } 4385 4386 /* Always allow software iftypes */ 4387 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4388 if (data->radar_detect) 4389 return -EINVAL; 4390 return 0; 4391 } 4392 4393 if (chandef) 4394 params.num_different_channels = 1; 4395 4396 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4397 params.iftype_num[iftype] = 1; 4398 4399 total = ieee80211_fill_ifcomb_params(local, ¶ms, 4400 shared ? chandef : NULL, 4401 sdata, 4402 data->chanctx_filter, 4403 data->filter_data); 4404 if (total == 1 && !params.radar_detect) 4405 return 0; 4406 4407 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4408 } 4409 4410 static void 4411 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4412 void *data) 4413 { 4414 u32 *max_num_different_channels = data; 4415 4416 *max_num_different_channels = max(*max_num_different_channels, 4417 c->num_different_channels); 4418 } 4419 4420 int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx) 4421 { 4422 u32 max_num_different_channels = 1; 4423 int err; 4424 struct iface_combination_params params = { 4425 .radio_idx = radio_idx, 4426 }; 4427 4428 lockdep_assert_wiphy(local->hw.wiphy); 4429 4430 ieee80211_fill_ifcomb_params(local, ¶ms, NULL, NULL, NULL, NULL); 4431 4432 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4433 ieee80211_iter_max_chans, 4434 &max_num_different_channels); 4435 if (err < 0) 4436 return err; 4437 4438 return max_num_different_channels; 4439 } 4440 4441 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4442 struct ieee80211_sta_s1g_cap *caps, 4443 struct sk_buff *skb) 4444 { 4445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4446 struct ieee80211_s1g_cap s1g_capab; 4447 u8 *pos; 4448 int i; 4449 4450 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4451 return; 4452 4453 if (!caps->s1g) 4454 return; 4455 4456 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4457 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4458 4459 /* override the capability info */ 4460 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4461 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4462 4463 s1g_capab.capab_info[i] &= ~mask; 4464 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4465 } 4466 4467 /* then MCS and NSS set */ 4468 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4469 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4470 4471 s1g_capab.supp_mcs_nss[i] &= ~mask; 4472 s1g_capab.supp_mcs_nss[i] |= 4473 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4474 } 4475 4476 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4477 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4478 *pos++ = sizeof(s1g_capab); 4479 4480 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4481 } 4482 4483 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4484 struct sk_buff *skb) 4485 { 4486 u8 *pos = skb_put(skb, 3); 4487 4488 *pos++ = WLAN_EID_AID_REQUEST; 4489 *pos++ = 1; 4490 *pos++ = 0; 4491 } 4492 4493 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4494 { 4495 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4496 *buf++ = 7; /* len */ 4497 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4498 *buf++ = 0x50; 4499 *buf++ = 0xf2; 4500 *buf++ = 2; /* WME */ 4501 *buf++ = 0; /* WME info */ 4502 *buf++ = 1; /* WME ver */ 4503 *buf++ = qosinfo; /* U-APSD no in use */ 4504 4505 return buf; 4506 } 4507 4508 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4509 unsigned long *frame_cnt, 4510 unsigned long *byte_cnt) 4511 { 4512 struct txq_info *txqi = to_txq_info(txq); 4513 u32 frag_cnt = 0, frag_bytes = 0; 4514 struct sk_buff *skb; 4515 4516 skb_queue_walk(&txqi->frags, skb) { 4517 frag_cnt++; 4518 frag_bytes += skb->len; 4519 } 4520 4521 if (frame_cnt) 4522 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4523 4524 if (byte_cnt) 4525 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4526 } 4527 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4528 4529 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4530 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4531 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4532 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4533 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4534 }; 4535 4536 u16 ieee80211_encode_usf(int listen_interval) 4537 { 4538 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4539 u16 ui, usf = 0; 4540 4541 /* find greatest USF */ 4542 while (usf < IEEE80211_MAX_USF) { 4543 if (listen_interval % listen_int_usf[usf + 1]) 4544 break; 4545 usf += 1; 4546 } 4547 ui = listen_interval / listen_int_usf[usf]; 4548 4549 /* error if there is a remainder. Should've been checked by user */ 4550 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4551 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4552 FIELD_PREP(LISTEN_INT_UI, ui); 4553 4554 return (u16) listen_interval; 4555 } 4556 4557 /* this may return more than ieee80211_put_eht_cap() will need */ 4558 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata) 4559 { 4560 const struct ieee80211_sta_he_cap *he_cap; 4561 const struct ieee80211_sta_eht_cap *eht_cap; 4562 struct ieee80211_supported_band *sband; 4563 bool is_ap; 4564 u8 n; 4565 4566 sband = ieee80211_get_sband(sdata); 4567 if (!sband) 4568 return 0; 4569 4570 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4571 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4572 if (!he_cap || !eht_cap) 4573 return 0; 4574 4575 is_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4576 4577 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4578 &eht_cap->eht_cap_elem, 4579 is_ap); 4580 return 2 + 1 + 4581 sizeof(eht_cap->eht_cap_elem) + n + 4582 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4583 eht_cap->eht_cap_elem.phy_cap_info); 4584 return 0; 4585 } 4586 4587 int ieee80211_put_eht_cap(struct sk_buff *skb, 4588 struct ieee80211_sub_if_data *sdata, 4589 const struct ieee80211_supported_band *sband, 4590 const struct ieee80211_conn_settings *conn) 4591 { 4592 const struct ieee80211_sta_he_cap *he_cap = 4593 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4594 const struct ieee80211_sta_eht_cap *eht_cap = 4595 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4596 bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4597 struct ieee80211_eht_cap_elem_fixed fixed; 4598 struct ieee80211_he_cap_elem he; 4599 u8 mcs_nss_len, ppet_len; 4600 u8 orig_mcs_nss_len; 4601 u8 ie_len; 4602 4603 if (!conn) 4604 conn = &ieee80211_conn_settings_unlimited; 4605 4606 /* Make sure we have place for the IE */ 4607 if (!he_cap || !eht_cap) 4608 return 0; 4609 4610 orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4611 &eht_cap->eht_cap_elem, 4612 for_ap); 4613 4614 ieee80211_get_adjusted_he_cap(conn, he_cap, &he); 4615 4616 fixed = eht_cap->eht_cap_elem; 4617 4618 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80) 4619 fixed.phy_cap_info[6] &= 4620 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ; 4621 4622 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 4623 fixed.phy_cap_info[1] &= 4624 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK; 4625 fixed.phy_cap_info[2] &= 4626 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK; 4627 fixed.phy_cap_info[6] &= 4628 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ; 4629 } 4630 4631 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) { 4632 fixed.phy_cap_info[0] &= 4633 ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 4634 fixed.phy_cap_info[1] &= 4635 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK; 4636 fixed.phy_cap_info[2] &= 4637 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK; 4638 fixed.phy_cap_info[6] &= 4639 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ; 4640 } 4641 4642 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) 4643 fixed.phy_cap_info[0] &= 4644 ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ; 4645 4646 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap); 4647 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4648 fixed.phy_cap_info); 4649 4650 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4651 if (skb_tailroom(skb) < ie_len) 4652 return -ENOBUFS; 4653 4654 skb_put_u8(skb, WLAN_EID_EXTENSION); 4655 skb_put_u8(skb, ie_len - 2); 4656 skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY); 4657 skb_put_data(skb, &fixed, sizeof(fixed)); 4658 4659 if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) { 4660 /* 4661 * If the (non-AP) STA became 20 MHz only, then convert from 4662 * <=80 to 20-MHz-only format, where MCSes are indicated in 4663 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9, 4664 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9. 4665 */ 4666 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4667 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4668 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss); 4669 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss); 4670 } else { 4671 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4672 } 4673 4674 if (ppet_len) 4675 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len); 4676 4677 return 0; 4678 } 4679 4680 int ieee80211_put_uhr_cap(struct sk_buff *skb, 4681 struct ieee80211_sub_if_data *sdata, 4682 const struct ieee80211_supported_band *sband) 4683 { 4684 const struct ieee80211_sta_uhr_cap *uhr_cap = 4685 ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 4686 int len; 4687 4688 if (!uhr_cap) 4689 return 0; 4690 4691 len = 2 + 1 + sizeof(struct ieee80211_uhr_cap); 4692 4693 if (skb_tailroom(skb) < len) 4694 return -ENOBUFS; 4695 4696 skb_put_u8(skb, WLAN_EID_EXTENSION); 4697 skb_put_u8(skb, len - 2); 4698 skb_put_u8(skb, WLAN_EID_EXT_UHR_CAPA); 4699 skb_put_data(skb, &uhr_cap->mac, sizeof(uhr_cap->mac)); 4700 skb_put_data(skb, &uhr_cap->phy, sizeof(uhr_cap->phy)); 4701 4702 return 0; 4703 } 4704 4705 int ieee80211_put_cip_cap(struct sk_buff *skb, 4706 struct ieee80211_sub_if_data *sdata) 4707 { 4708 const struct wiphy_iftype_ext_capab *ift_ext_capa = 4709 cfg80211_get_iftype_ext_capa(sdata->local->hw.wiphy, 4710 ieee80211_vif_type_p2p(&sdata->vif)); 4711 u8 cip_capabilities = ift_ext_capa ? ift_ext_capa->cip_capabilities : 0; 4712 4713 if (skb_tailroom(skb) < 4) 4714 return -ENOBUFS; 4715 4716 skb_put_u8(skb, WLAN_EID_EXTENSION); 4717 skb_put_u8(skb, 2); 4718 skb_put_u8(skb, WLAN_EID_EXT_CIP_CAPA); 4719 skb_put_u8(skb, cip_capabilities); 4720 4721 return 0; 4722 } 4723 4724 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode) 4725 { 4726 static const char * const modes[] = { 4727 [IEEE80211_CONN_MODE_S1G] = "S1G", 4728 [IEEE80211_CONN_MODE_LEGACY] = "legacy", 4729 [IEEE80211_CONN_MODE_HT] = "HT", 4730 [IEEE80211_CONN_MODE_VHT] = "VHT", 4731 [IEEE80211_CONN_MODE_HE] = "HE", 4732 [IEEE80211_CONN_MODE_EHT] = "EHT", 4733 [IEEE80211_CONN_MODE_UHR] = "UHR", 4734 }; 4735 4736 if (WARN_ON(mode >= ARRAY_SIZE(modes))) 4737 return "<out of range>"; 4738 4739 return modes[mode] ?: "<missing string>"; 4740 } 4741 4742 enum ieee80211_conn_bw_limit 4743 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef) 4744 { 4745 switch (chandef->width) { 4746 case NL80211_CHAN_WIDTH_20_NOHT: 4747 case NL80211_CHAN_WIDTH_20: 4748 return IEEE80211_CONN_BW_LIMIT_20; 4749 case NL80211_CHAN_WIDTH_40: 4750 return IEEE80211_CONN_BW_LIMIT_40; 4751 case NL80211_CHAN_WIDTH_80: 4752 return IEEE80211_CONN_BW_LIMIT_80; 4753 case NL80211_CHAN_WIDTH_80P80: 4754 case NL80211_CHAN_WIDTH_160: 4755 return IEEE80211_CONN_BW_LIMIT_160; 4756 case NL80211_CHAN_WIDTH_320: 4757 return IEEE80211_CONN_BW_LIMIT_320; 4758 default: 4759 WARN(1, "unhandled chandef width %d\n", chandef->width); 4760 return IEEE80211_CONN_BW_LIMIT_20; 4761 } 4762 } 4763 4764 void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe) 4765 { 4766 for (int i = 0; i < 2; i++) { 4767 tpe->max_local[i].valid = false; 4768 memset(tpe->max_local[i].power, 4769 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4770 sizeof(tpe->max_local[i].power)); 4771 4772 tpe->max_reg_client[i].valid = false; 4773 memset(tpe->max_reg_client[i].power, 4774 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4775 sizeof(tpe->max_reg_client[i].power)); 4776 4777 tpe->psd_local[i].valid = false; 4778 memset(tpe->psd_local[i].power, 4779 IEEE80211_TPE_PSD_NO_LIMIT, 4780 sizeof(tpe->psd_local[i].power)); 4781 4782 tpe->psd_reg_client[i].valid = false; 4783 memset(tpe->psd_reg_client[i].power, 4784 IEEE80211_TPE_PSD_NO_LIMIT, 4785 sizeof(tpe->psd_reg_client[i].power)); 4786 } 4787 } 4788 4789 bool ieee80211_vif_nan_started(struct ieee80211_vif *vif) 4790 { 4791 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4792 4793 return vif->type == NL80211_IFTYPE_NAN && sdata->u.nan.started; 4794 } 4795 EXPORT_SYMBOL_GPL(ieee80211_vif_nan_started); 4796