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_EHT, 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 return ext->u.s1g_beacon.sa; 77 } 78 79 if (ieee80211_is_mgmt(fc)) { 80 if (len < 24) /* drop incorrect hdr len (mgmt) */ 81 return NULL; 82 return hdr->addr3; 83 } 84 85 if (ieee80211_is_ctl(fc)) { 86 if (ieee80211_is_pspoll(fc)) 87 return hdr->addr1; 88 89 if (ieee80211_is_back_req(fc)) { 90 switch (type) { 91 case NL80211_IFTYPE_STATION: 92 return hdr->addr2; 93 case NL80211_IFTYPE_AP: 94 case NL80211_IFTYPE_AP_VLAN: 95 return hdr->addr1; 96 default: 97 break; /* fall through to the return */ 98 } 99 } 100 } 101 102 return NULL; 103 } 104 105 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx) 106 { 107 struct sk_buff *skb; 108 struct ieee80211_hdr *hdr; 109 110 skb_queue_walk(&tx->skbs, skb) { 111 hdr = (struct ieee80211_hdr *) skb->data; 112 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 113 } 114 } 115 116 int ieee80211_frame_duration(enum nl80211_band band, size_t len, 117 int rate, int erp, int short_preamble) 118 { 119 int dur; 120 121 /* calculate duration (in microseconds, rounded up to next higher 122 * integer if it includes a fractional microsecond) to send frame of 123 * len bytes (does not include FCS) at the given rate. Duration will 124 * also include SIFS. 125 * 126 * rate is in 100 kbps, so divident is multiplied by 10 in the 127 * DIV_ROUND_UP() operations. 128 */ 129 130 if (band == NL80211_BAND_5GHZ || erp) { 131 /* 132 * OFDM: 133 * 134 * N_DBPS = DATARATE x 4 135 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) 136 * (16 = SIGNAL time, 6 = tail bits) 137 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext 138 * 139 * T_SYM = 4 usec 140 * 802.11a - 18.5.2: aSIFSTime = 16 usec 141 * 802.11g - 19.8.4: aSIFSTime = 10 usec + 142 * signal ext = 6 usec 143 */ 144 dur = 16; /* SIFS + signal ext */ 145 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */ 146 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */ 147 148 /* rates should already consider the channel bandwidth, 149 * don't apply divisor again. 150 */ 151 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, 152 4 * rate); /* T_SYM x N_SYM */ 153 } else { 154 /* 155 * 802.11b or 802.11g with 802.11b compatibility: 156 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + 157 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. 158 * 159 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 160 * aSIFSTime = 10 usec 161 * aPreambleLength = 144 usec or 72 usec with short preamble 162 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble 163 */ 164 dur = 10; /* aSIFSTime = 10 usec */ 165 dur += short_preamble ? (72 + 24) : (144 + 48); 166 167 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); 168 } 169 170 return dur; 171 } 172 173 /* Exported duration function for driver use */ 174 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 175 struct ieee80211_vif *vif, 176 enum nl80211_band band, 177 size_t frame_len, 178 struct ieee80211_rate *rate) 179 { 180 struct ieee80211_sub_if_data *sdata; 181 u16 dur; 182 int erp; 183 bool short_preamble = false; 184 185 erp = 0; 186 if (vif) { 187 sdata = vif_to_sdata(vif); 188 short_preamble = sdata->vif.bss_conf.use_short_preamble; 189 if (sdata->deflink.operating_11g_mode) 190 erp = rate->flags & IEEE80211_RATE_ERP_G; 191 } 192 193 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp, 194 short_preamble); 195 196 return cpu_to_le16(dur); 197 } 198 EXPORT_SYMBOL(ieee80211_generic_frame_duration); 199 200 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 201 struct ieee80211_vif *vif, size_t frame_len, 202 const struct ieee80211_tx_info *frame_txctl) 203 { 204 struct ieee80211_local *local = hw_to_local(hw); 205 struct ieee80211_rate *rate; 206 struct ieee80211_sub_if_data *sdata; 207 bool short_preamble; 208 int erp, bitrate; 209 u16 dur; 210 struct ieee80211_supported_band *sband; 211 212 sband = local->hw.wiphy->bands[frame_txctl->band]; 213 214 short_preamble = false; 215 216 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 217 218 erp = 0; 219 if (vif) { 220 sdata = vif_to_sdata(vif); 221 short_preamble = sdata->vif.bss_conf.use_short_preamble; 222 if (sdata->deflink.operating_11g_mode) 223 erp = rate->flags & IEEE80211_RATE_ERP_G; 224 } 225 226 bitrate = rate->bitrate; 227 228 /* CTS duration */ 229 dur = ieee80211_frame_duration(sband->band, 10, bitrate, 230 erp, short_preamble); 231 /* Data frame duration */ 232 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate, 233 erp, short_preamble); 234 /* ACK duration */ 235 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 236 erp, short_preamble); 237 238 return cpu_to_le16(dur); 239 } 240 EXPORT_SYMBOL(ieee80211_rts_duration); 241 242 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 243 struct ieee80211_vif *vif, 244 size_t frame_len, 245 const struct ieee80211_tx_info *frame_txctl) 246 { 247 struct ieee80211_local *local = hw_to_local(hw); 248 struct ieee80211_rate *rate; 249 struct ieee80211_sub_if_data *sdata; 250 bool short_preamble; 251 int erp, bitrate; 252 u16 dur; 253 struct ieee80211_supported_band *sband; 254 255 sband = local->hw.wiphy->bands[frame_txctl->band]; 256 257 short_preamble = false; 258 259 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx]; 260 erp = 0; 261 if (vif) { 262 sdata = vif_to_sdata(vif); 263 short_preamble = sdata->vif.bss_conf.use_short_preamble; 264 if (sdata->deflink.operating_11g_mode) 265 erp = rate->flags & IEEE80211_RATE_ERP_G; 266 } 267 268 bitrate = rate->bitrate; 269 270 /* Data frame duration */ 271 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate, 272 erp, short_preamble); 273 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) { 274 /* ACK duration */ 275 dur += ieee80211_frame_duration(sband->band, 10, bitrate, 276 erp, short_preamble); 277 } 278 279 return cpu_to_le16(dur); 280 } 281 EXPORT_SYMBOL(ieee80211_ctstoself_duration); 282 283 static void wake_tx_push_queue(struct ieee80211_local *local, 284 struct ieee80211_sub_if_data *sdata, 285 struct ieee80211_txq *queue) 286 { 287 struct ieee80211_tx_control control = { 288 .sta = queue->sta, 289 }; 290 struct sk_buff *skb; 291 292 while (1) { 293 skb = ieee80211_tx_dequeue(&local->hw, queue); 294 if (!skb) 295 break; 296 297 drv_tx(local, &control, skb); 298 } 299 } 300 301 /* wake_tx_queue handler for driver not implementing a custom one*/ 302 void ieee80211_handle_wake_tx_queue(struct ieee80211_hw *hw, 303 struct ieee80211_txq *txq) 304 { 305 struct ieee80211_local *local = hw_to_local(hw); 306 struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->vif); 307 struct ieee80211_txq *queue; 308 309 spin_lock(&local->handle_wake_tx_queue_lock); 310 311 /* Use ieee80211_next_txq() for airtime fairness accounting */ 312 ieee80211_txq_schedule_start(hw, txq->ac); 313 while ((queue = ieee80211_next_txq(hw, txq->ac))) { 314 wake_tx_push_queue(local, sdata, queue); 315 ieee80211_return_txq(hw, queue, false); 316 } 317 ieee80211_txq_schedule_end(hw, txq->ac); 318 spin_unlock(&local->handle_wake_tx_queue_lock); 319 } 320 EXPORT_SYMBOL(ieee80211_handle_wake_tx_queue); 321 322 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) 323 { 324 struct ieee80211_local *local = sdata->local; 325 struct ieee80211_vif *vif = &sdata->vif; 326 struct fq *fq = &local->fq; 327 struct ps_data *ps = NULL; 328 struct txq_info *txqi = NULL; 329 struct sta_info *sta; 330 int i; 331 332 local_bh_disable(); 333 spin_lock(&fq->lock); 334 335 if (!test_bit(SDATA_STATE_RUNNING, &sdata->state)) 336 goto out; 337 338 if (sdata->vif.type == NL80211_IFTYPE_AP) 339 ps = &sdata->bss->ps; 340 341 list_for_each_entry_rcu(sta, &local->sta_list, list) { 342 if (sdata != sta->sdata) 343 continue; 344 345 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) { 346 struct ieee80211_txq *txq = sta->sta.txq[i]; 347 struct txq_info *sta_txqi; 348 349 if (!txq) 350 continue; 351 352 sta_txqi = to_txq_info(txq); 353 354 if (ac != txq->ac) 355 continue; 356 357 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, 358 &sta_txqi->flags)) 359 continue; 360 361 spin_unlock(&fq->lock); 362 drv_wake_tx_queue(local, sta_txqi); 363 spin_lock(&fq->lock); 364 } 365 } 366 367 if (vif->txq) { 368 txqi = to_txq_info(vif->txq); 369 370 /* txq and txq_mgmt are mutually exclusive */ 371 WARN_ON_ONCE(vif->txq_mgmt); 372 373 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) || 374 (ps && atomic_read(&ps->num_sta_ps)) || 375 ac != vif->txq->ac) 376 txqi = NULL; 377 } else if (vif->txq_mgmt) { 378 txqi = to_txq_info(vif->txq_mgmt); 379 380 if (!test_and_clear_bit(IEEE80211_TXQ_DIRTY, &txqi->flags) || 381 ac != vif->txq_mgmt->ac) 382 txqi = NULL; 383 } 384 385 spin_unlock(&fq->lock); 386 387 if (txqi) 388 drv_wake_tx_queue(local, txqi); 389 390 local_bh_enable(); 391 return; 392 out: 393 spin_unlock(&fq->lock); 394 local_bh_enable(); 395 } 396 397 static void 398 __releases(&local->queue_stop_reason_lock) 399 __acquires(&local->queue_stop_reason_lock) 400 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags) 401 { 402 struct ieee80211_sub_if_data *sdata; 403 int n_acs = IEEE80211_NUM_ACS; 404 int i; 405 406 rcu_read_lock(); 407 408 if (local->hw.queues < IEEE80211_NUM_ACS) 409 n_acs = 1; 410 411 for (i = 0; i < local->hw.queues; i++) { 412 if (local->queue_stop_reasons[i]) 413 continue; 414 415 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags); 416 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 417 int ac; 418 419 for (ac = 0; ac < n_acs; ac++) { 420 int ac_queue = sdata->vif.hw_queue[ac]; 421 422 if (ac_queue == i || 423 sdata->vif.cab_queue == i) 424 __ieee80211_wake_txqs(sdata, ac); 425 } 426 } 427 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags); 428 } 429 430 rcu_read_unlock(); 431 } 432 433 void ieee80211_wake_txqs(struct tasklet_struct *t) 434 { 435 struct ieee80211_local *local = from_tasklet(local, t, 436 wake_txqs_tasklet); 437 unsigned long flags; 438 439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 440 _ieee80211_wake_txqs(local, &flags); 441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 442 } 443 444 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue, 445 enum queue_stop_reason reason, 446 bool refcounted, 447 unsigned long *flags) 448 { 449 struct ieee80211_local *local = hw_to_local(hw); 450 451 if (WARN_ON(queue >= hw->queues)) 452 return; 453 454 if (!test_bit(reason, &local->queue_stop_reasons[queue])) 455 return; 456 457 if (!refcounted) { 458 local->q_stop_reasons[queue][reason] = 0; 459 } else { 460 local->q_stop_reasons[queue][reason]--; 461 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0)) 462 local->q_stop_reasons[queue][reason] = 0; 463 } 464 465 if (local->q_stop_reasons[queue][reason] == 0) 466 __clear_bit(reason, &local->queue_stop_reasons[queue]); 467 468 trace_wake_queue(local, queue, reason, 469 local->q_stop_reasons[queue][reason]); 470 471 if (local->queue_stop_reasons[queue] != 0) 472 /* someone still has this queue stopped */ 473 return; 474 475 if (!skb_queue_empty(&local->pending[queue])) 476 tasklet_schedule(&local->tx_pending_tasklet); 477 478 /* 479 * Calling _ieee80211_wake_txqs here can be a problem because it may 480 * release queue_stop_reason_lock which has been taken by 481 * __ieee80211_wake_queue's caller. It is certainly not very nice to 482 * release someone's lock, but it is fine because all the callers of 483 * __ieee80211_wake_queue call it right before releasing the lock. 484 */ 485 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER) 486 tasklet_schedule(&local->wake_txqs_tasklet); 487 else 488 _ieee80211_wake_txqs(local, flags); 489 } 490 491 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue, 492 enum queue_stop_reason reason, 493 bool refcounted) 494 { 495 struct ieee80211_local *local = hw_to_local(hw); 496 unsigned long flags; 497 498 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 499 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags); 500 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 501 } 502 503 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) 504 { 505 ieee80211_wake_queue_by_reason(hw, queue, 506 IEEE80211_QUEUE_STOP_REASON_DRIVER, 507 false); 508 } 509 EXPORT_SYMBOL(ieee80211_wake_queue); 510 511 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue, 512 enum queue_stop_reason reason, 513 bool refcounted) 514 { 515 struct ieee80211_local *local = hw_to_local(hw); 516 517 if (WARN_ON(queue >= hw->queues)) 518 return; 519 520 if (!refcounted) 521 local->q_stop_reasons[queue][reason] = 1; 522 else 523 local->q_stop_reasons[queue][reason]++; 524 525 trace_stop_queue(local, queue, reason, 526 local->q_stop_reasons[queue][reason]); 527 528 set_bit(reason, &local->queue_stop_reasons[queue]); 529 } 530 531 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue, 532 enum queue_stop_reason reason, 533 bool refcounted) 534 { 535 struct ieee80211_local *local = hw_to_local(hw); 536 unsigned long flags; 537 538 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 539 __ieee80211_stop_queue(hw, queue, reason, refcounted); 540 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 541 } 542 543 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) 544 { 545 ieee80211_stop_queue_by_reason(hw, queue, 546 IEEE80211_QUEUE_STOP_REASON_DRIVER, 547 false); 548 } 549 EXPORT_SYMBOL(ieee80211_stop_queue); 550 551 void ieee80211_add_pending_skb(struct ieee80211_local *local, 552 struct sk_buff *skb) 553 { 554 struct ieee80211_hw *hw = &local->hw; 555 unsigned long flags; 556 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 557 int queue = info->hw_queue; 558 559 if (WARN_ON(!info->control.vif)) { 560 ieee80211_free_txskb(&local->hw, skb); 561 return; 562 } 563 564 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 565 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 566 false); 567 __skb_queue_tail(&local->pending[queue], skb); 568 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 569 false, &flags); 570 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 571 } 572 573 void ieee80211_add_pending_skbs(struct ieee80211_local *local, 574 struct sk_buff_head *skbs) 575 { 576 struct ieee80211_hw *hw = &local->hw; 577 struct sk_buff *skb; 578 unsigned long flags; 579 int queue, i; 580 581 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 582 while ((skb = skb_dequeue(skbs))) { 583 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 584 585 if (WARN_ON(!info->control.vif)) { 586 ieee80211_free_txskb(&local->hw, skb); 587 continue; 588 } 589 590 queue = info->hw_queue; 591 592 __ieee80211_stop_queue(hw, queue, 593 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 594 false); 595 596 __skb_queue_tail(&local->pending[queue], skb); 597 } 598 599 for (i = 0; i < hw->queues; i++) 600 __ieee80211_wake_queue(hw, i, 601 IEEE80211_QUEUE_STOP_REASON_SKB_ADD, 602 false, &flags); 603 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 604 } 605 606 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw, 607 unsigned long queues, 608 enum queue_stop_reason reason, 609 bool refcounted) 610 { 611 struct ieee80211_local *local = hw_to_local(hw); 612 unsigned long flags; 613 int i; 614 615 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 616 617 for_each_set_bit(i, &queues, hw->queues) 618 __ieee80211_stop_queue(hw, i, reason, refcounted); 619 620 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 621 } 622 623 void ieee80211_stop_queues(struct ieee80211_hw *hw) 624 { 625 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 626 IEEE80211_QUEUE_STOP_REASON_DRIVER, 627 false); 628 } 629 EXPORT_SYMBOL(ieee80211_stop_queues); 630 631 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue) 632 { 633 struct ieee80211_local *local = hw_to_local(hw); 634 unsigned long flags; 635 int ret; 636 637 if (WARN_ON(queue >= hw->queues)) 638 return true; 639 640 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 641 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER, 642 &local->queue_stop_reasons[queue]); 643 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 644 return ret; 645 } 646 EXPORT_SYMBOL(ieee80211_queue_stopped); 647 648 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw, 649 unsigned long queues, 650 enum queue_stop_reason reason, 651 bool refcounted) 652 { 653 struct ieee80211_local *local = hw_to_local(hw); 654 unsigned long flags; 655 int i; 656 657 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 658 659 for_each_set_bit(i, &queues, hw->queues) 660 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags); 661 662 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 663 } 664 665 void ieee80211_wake_queues(struct ieee80211_hw *hw) 666 { 667 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 668 IEEE80211_QUEUE_STOP_REASON_DRIVER, 669 false); 670 } 671 EXPORT_SYMBOL(ieee80211_wake_queues); 672 673 unsigned int 674 ieee80211_get_vif_queues(struct ieee80211_local *local, 675 struct ieee80211_sub_if_data *sdata) 676 { 677 unsigned int queues; 678 679 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) { 680 int ac; 681 682 queues = 0; 683 684 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 685 if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE) 686 queues |= BIT(sdata->vif.hw_queue[ac]); 687 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE) 688 queues |= BIT(sdata->vif.cab_queue); 689 } else { 690 /* all queues */ 691 queues = BIT(local->hw.queues) - 1; 692 } 693 694 return queues; 695 } 696 697 void __ieee80211_flush_queues(struct ieee80211_local *local, 698 struct ieee80211_sub_if_data *sdata, 699 unsigned int queues, bool drop) 700 { 701 if (!local->ops->flush && !drop) 702 return; 703 704 /* 705 * If no queue was set, or if the HW doesn't support 706 * IEEE80211_HW_QUEUE_CONTROL - flush all queues 707 */ 708 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) 709 queues = ieee80211_get_vif_queues(local, sdata); 710 711 ieee80211_stop_queues_by_reason(&local->hw, queues, 712 IEEE80211_QUEUE_STOP_REASON_FLUSH, 713 false); 714 715 if (drop) { 716 struct sta_info *sta; 717 718 /* Purge the queues, so the frames on them won't be 719 * sent during __ieee80211_wake_queue() 720 */ 721 list_for_each_entry(sta, &local->sta_list, list) { 722 if (sdata != sta->sdata) 723 continue; 724 ieee80211_purge_sta_txqs(sta); 725 } 726 } 727 728 if (local->ops->flush) 729 drv_flush(local, sdata, queues, drop); 730 731 ieee80211_wake_queues_by_reason(&local->hw, queues, 732 IEEE80211_QUEUE_STOP_REASON_FLUSH, 733 false); 734 } 735 736 void ieee80211_flush_queues(struct ieee80211_local *local, 737 struct ieee80211_sub_if_data *sdata, bool drop) 738 { 739 __ieee80211_flush_queues(local, sdata, 0, drop); 740 } 741 742 static void __iterate_interfaces(struct ieee80211_local *local, 743 u32 iter_flags, 744 void (*iterator)(void *data, u8 *mac, 745 struct ieee80211_vif *vif), 746 void *data) 747 { 748 struct ieee80211_sub_if_data *sdata; 749 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 750 751 list_for_each_entry_rcu(sdata, &local->interfaces, list, 752 lockdep_is_held(&local->iflist_mtx) || 753 lockdep_is_held(&local->hw.wiphy->mtx)) { 754 switch (sdata->vif.type) { 755 case NL80211_IFTYPE_MONITOR: 756 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 757 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 758 continue; 759 break; 760 case NL80211_IFTYPE_AP_VLAN: 761 continue; 762 default: 763 break; 764 } 765 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 766 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 767 continue; 768 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 769 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 770 continue; 771 if (ieee80211_sdata_running(sdata) || !active_only) 772 iterator(data, sdata->vif.addr, 773 &sdata->vif); 774 } 775 776 sdata = rcu_dereference_check(local->monitor_sdata, 777 lockdep_is_held(&local->iflist_mtx) || 778 lockdep_is_held(&local->hw.wiphy->mtx)); 779 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) && 780 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 781 sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 782 iterator(data, sdata->vif.addr, &sdata->vif); 783 } 784 785 void ieee80211_iterate_interfaces( 786 struct ieee80211_hw *hw, u32 iter_flags, 787 void (*iterator)(void *data, u8 *mac, 788 struct ieee80211_vif *vif), 789 void *data) 790 { 791 struct ieee80211_local *local = hw_to_local(hw); 792 793 mutex_lock(&local->iflist_mtx); 794 __iterate_interfaces(local, iter_flags, iterator, data); 795 mutex_unlock(&local->iflist_mtx); 796 } 797 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces); 798 799 void ieee80211_iterate_active_interfaces_atomic( 800 struct ieee80211_hw *hw, u32 iter_flags, 801 void (*iterator)(void *data, u8 *mac, 802 struct ieee80211_vif *vif), 803 void *data) 804 { 805 struct ieee80211_local *local = hw_to_local(hw); 806 807 rcu_read_lock(); 808 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE, 809 iterator, data); 810 rcu_read_unlock(); 811 } 812 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic); 813 814 struct ieee80211_vif * 815 __ieee80211_iterate_interfaces(struct ieee80211_hw *hw, 816 struct ieee80211_vif *prev, 817 u32 iter_flags) 818 { 819 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE; 820 struct ieee80211_sub_if_data *sdata = NULL, *monitor; 821 struct ieee80211_local *local = hw_to_local(hw); 822 823 lockdep_assert_wiphy(hw->wiphy); 824 825 if (prev) 826 sdata = vif_to_sdata(prev); 827 828 monitor = rcu_dereference_check(local->monitor_sdata, 829 lockdep_is_held(&hw->wiphy->mtx)); 830 if (monitor && monitor == sdata) 831 return NULL; 832 833 sdata = list_prepare_entry(sdata, &local->interfaces, list); 834 list_for_each_entry_continue(sdata, &local->interfaces, list) { 835 switch (sdata->vif.type) { 836 case NL80211_IFTYPE_MONITOR: 837 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) && 838 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 839 continue; 840 break; 841 case NL80211_IFTYPE_AP_VLAN: 842 continue; 843 default: 844 break; 845 } 846 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) && 847 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 848 continue; 849 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) && 850 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 851 continue; 852 if (ieee80211_sdata_running(sdata) || !active_only) 853 return &sdata->vif; 854 } 855 856 if (monitor && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) && 857 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only || 858 monitor->flags & IEEE80211_SDATA_IN_DRIVER)) 859 return &monitor->vif; 860 861 return NULL; 862 } 863 EXPORT_SYMBOL_GPL(__ieee80211_iterate_interfaces); 864 865 static void __iterate_stations(struct ieee80211_local *local, 866 void (*iterator)(void *data, 867 struct ieee80211_sta *sta), 868 void *data) 869 { 870 struct sta_info *sta; 871 872 list_for_each_entry_rcu(sta, &local->sta_list, list, 873 lockdep_is_held(&local->hw.wiphy->mtx)) { 874 if (!sta->uploaded) 875 continue; 876 877 iterator(data, &sta->sta); 878 } 879 } 880 881 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw, 882 void (*iterator)(void *data, 883 struct ieee80211_sta *sta), 884 void *data) 885 { 886 struct ieee80211_local *local = hw_to_local(hw); 887 888 rcu_read_lock(); 889 __iterate_stations(local, iterator, data); 890 rcu_read_unlock(); 891 } 892 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic); 893 894 struct ieee80211_sta * 895 __ieee80211_iterate_stations(struct ieee80211_hw *hw, 896 struct ieee80211_sta *prev) 897 { 898 struct ieee80211_local *local = hw_to_local(hw); 899 struct sta_info *sta = NULL; 900 901 lockdep_assert_wiphy(local->hw.wiphy); 902 903 if (prev) 904 sta = container_of(prev, struct sta_info, sta); 905 906 sta = list_prepare_entry(sta, &local->sta_list, list); 907 list_for_each_entry_continue(sta, &local->sta_list, list) { 908 if (!sta->uploaded) 909 continue; 910 911 return &sta->sta; 912 } 913 914 return NULL; 915 } 916 EXPORT_SYMBOL_GPL(__ieee80211_iterate_stations); 917 918 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev) 919 { 920 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); 921 922 if (!ieee80211_sdata_running(sdata) || 923 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER)) 924 return NULL; 925 return &sdata->vif; 926 } 927 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif); 928 929 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif) 930 { 931 if (!vif) 932 return NULL; 933 934 return &vif_to_sdata(vif)->wdev; 935 } 936 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev); 937 938 /* 939 * Nothing should have been stuffed into the workqueue during 940 * the suspend->resume cycle. Since we can't check each caller 941 * of this function if we are already quiescing / suspended, 942 * check here and don't WARN since this can actually happen when 943 * the rx path (for example) is racing against __ieee80211_suspend 944 * and suspending / quiescing was set after the rx path checked 945 * them. 946 */ 947 static bool ieee80211_can_queue_work(struct ieee80211_local *local) 948 { 949 if (local->quiescing || (local->suspended && !local->resuming)) { 950 pr_warn("queueing ieee80211 work while going to suspend\n"); 951 return false; 952 } 953 954 return true; 955 } 956 957 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work) 958 { 959 struct ieee80211_local *local = hw_to_local(hw); 960 961 if (!ieee80211_can_queue_work(local)) 962 return; 963 964 queue_work(local->workqueue, work); 965 } 966 EXPORT_SYMBOL(ieee80211_queue_work); 967 968 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 969 struct delayed_work *dwork, 970 unsigned long delay) 971 { 972 struct ieee80211_local *local = hw_to_local(hw); 973 974 if (!ieee80211_can_queue_work(local)) 975 return; 976 977 queue_delayed_work(local->workqueue, dwork, delay); 978 } 979 EXPORT_SYMBOL(ieee80211_queue_delayed_work); 980 981 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, 982 struct ieee80211_tx_queue_params 983 *qparam, int ac) 984 { 985 struct ieee80211_chanctx_conf *chanctx_conf; 986 const struct ieee80211_reg_rule *rrule; 987 const struct ieee80211_wmm_ac *wmm_ac; 988 u16 center_freq = 0; 989 990 if (sdata->vif.type != NL80211_IFTYPE_AP && 991 sdata->vif.type != NL80211_IFTYPE_STATION) 992 return; 993 994 rcu_read_lock(); 995 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf); 996 if (chanctx_conf) 997 center_freq = chanctx_conf->def.chan->center_freq; 998 999 if (!center_freq) { 1000 rcu_read_unlock(); 1001 return; 1002 } 1003 1004 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq)); 1005 1006 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) { 1007 rcu_read_unlock(); 1008 return; 1009 } 1010 1011 if (sdata->vif.type == NL80211_IFTYPE_AP) 1012 wmm_ac = &rrule->wmm_rule.ap[ac]; 1013 else 1014 wmm_ac = &rrule->wmm_rule.client[ac]; 1015 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min); 1016 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max); 1017 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn); 1018 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32); 1019 rcu_read_unlock(); 1020 } 1021 1022 void ieee80211_set_wmm_default(struct ieee80211_link_data *link, 1023 bool bss_notify, bool enable_qos) 1024 { 1025 struct ieee80211_sub_if_data *sdata = link->sdata; 1026 struct ieee80211_local *local = sdata->local; 1027 struct ieee80211_tx_queue_params qparam; 1028 struct ieee80211_chanctx_conf *chanctx_conf; 1029 int ac; 1030 bool use_11b; 1031 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */ 1032 int aCWmin, aCWmax; 1033 1034 if (!local->ops->conf_tx) 1035 return; 1036 1037 if (local->hw.queues < IEEE80211_NUM_ACS) 1038 return; 1039 1040 memset(&qparam, 0, sizeof(qparam)); 1041 1042 rcu_read_lock(); 1043 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1044 use_11b = (chanctx_conf && 1045 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) && 1046 !link->operating_11g_mode; 1047 rcu_read_unlock(); 1048 1049 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB); 1050 1051 /* Set defaults according to 802.11-2007 Table 7-37 */ 1052 aCWmax = 1023; 1053 if (use_11b) 1054 aCWmin = 31; 1055 else 1056 aCWmin = 15; 1057 1058 /* Configure old 802.11b/g medium access rules. */ 1059 qparam.cw_max = aCWmax; 1060 qparam.cw_min = aCWmin; 1061 qparam.txop = 0; 1062 qparam.aifs = 2; 1063 1064 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 1065 /* Update if QoS is enabled. */ 1066 if (enable_qos) { 1067 switch (ac) { 1068 case IEEE80211_AC_BK: 1069 qparam.cw_max = aCWmax; 1070 qparam.cw_min = aCWmin; 1071 qparam.txop = 0; 1072 if (is_ocb) 1073 qparam.aifs = 9; 1074 else 1075 qparam.aifs = 7; 1076 break; 1077 /* never happens but let's not leave undefined */ 1078 default: 1079 case IEEE80211_AC_BE: 1080 qparam.cw_max = aCWmax; 1081 qparam.cw_min = aCWmin; 1082 qparam.txop = 0; 1083 if (is_ocb) 1084 qparam.aifs = 6; 1085 else 1086 qparam.aifs = 3; 1087 break; 1088 case IEEE80211_AC_VI: 1089 qparam.cw_max = aCWmin; 1090 qparam.cw_min = (aCWmin + 1) / 2 - 1; 1091 if (is_ocb) 1092 qparam.txop = 0; 1093 else if (use_11b) 1094 qparam.txop = 6016/32; 1095 else 1096 qparam.txop = 3008/32; 1097 1098 if (is_ocb) 1099 qparam.aifs = 3; 1100 else 1101 qparam.aifs = 2; 1102 break; 1103 case IEEE80211_AC_VO: 1104 qparam.cw_max = (aCWmin + 1) / 2 - 1; 1105 qparam.cw_min = (aCWmin + 1) / 4 - 1; 1106 if (is_ocb) 1107 qparam.txop = 0; 1108 else if (use_11b) 1109 qparam.txop = 3264/32; 1110 else 1111 qparam.txop = 1504/32; 1112 qparam.aifs = 2; 1113 break; 1114 } 1115 } 1116 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac); 1117 1118 qparam.uapsd = false; 1119 1120 link->tx_conf[ac] = qparam; 1121 drv_conf_tx(local, link, ac, &qparam); 1122 } 1123 1124 if (sdata->vif.type != NL80211_IFTYPE_MONITOR && 1125 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && 1126 sdata->vif.type != NL80211_IFTYPE_NAN) { 1127 link->conf->qos = enable_qos; 1128 if (bss_notify) 1129 ieee80211_link_info_change_notify(sdata, link, 1130 BSS_CHANGED_QOS); 1131 } 1132 } 1133 1134 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata, 1135 u16 transaction, u16 auth_alg, u16 status, 1136 const u8 *extra, size_t extra_len, const u8 *da, 1137 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx, 1138 u32 tx_flags) 1139 { 1140 struct ieee80211_local *local = sdata->local; 1141 struct sk_buff *skb; 1142 struct ieee80211_mgmt *mgmt; 1143 bool multi_link = ieee80211_vif_is_mld(&sdata->vif); 1144 struct { 1145 u8 id; 1146 u8 len; 1147 u8 ext_id; 1148 struct ieee80211_multi_link_elem ml; 1149 struct ieee80211_mle_basic_common_info basic; 1150 } __packed mle = { 1151 .id = WLAN_EID_EXTENSION, 1152 .len = sizeof(mle) - 2, 1153 .ext_id = WLAN_EID_EXT_EHT_MULTI_LINK, 1154 .ml.control = cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC), 1155 .basic.len = sizeof(mle.basic), 1156 }; 1157 bool add_mle; 1158 int err; 1159 1160 add_mle = (multi_link && 1161 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 1162 extra, extra_len)); 1163 1164 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */ 1165 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN + 1166 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN + 1167 add_mle * sizeof(mle)); 1168 if (!skb) 1169 return; 1170 1171 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN); 1172 1173 mgmt = skb_put_zero(skb, 24 + 6); 1174 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1175 IEEE80211_STYPE_AUTH); 1176 memcpy(mgmt->da, da, ETH_ALEN); 1177 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1178 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1179 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg); 1180 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction); 1181 mgmt->u.auth.status_code = cpu_to_le16(status); 1182 if (extra) 1183 skb_put_data(skb, extra, extra_len); 1184 1185 if (add_mle) { 1186 memcpy(mle.basic.mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1187 skb_put_data(skb, &mle, sizeof(mle)); 1188 } 1189 1190 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) { 1191 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); 1192 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx); 1193 if (WARN_ON(err)) { 1194 kfree_skb(skb); 1195 return; 1196 } 1197 } 1198 1199 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1200 tx_flags; 1201 ieee80211_tx_skb(sdata, skb); 1202 } 1203 1204 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata, 1205 const u8 *da, const u8 *bssid, 1206 u16 stype, u16 reason, 1207 bool send_frame, u8 *frame_buf) 1208 { 1209 struct ieee80211_local *local = sdata->local; 1210 struct sk_buff *skb; 1211 struct ieee80211_mgmt *mgmt = (void *)frame_buf; 1212 1213 /* build frame */ 1214 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype); 1215 mgmt->duration = 0; /* initialize only */ 1216 mgmt->seq_ctrl = 0; /* initialize only */ 1217 memcpy(mgmt->da, da, ETH_ALEN); 1218 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1219 memcpy(mgmt->bssid, bssid, ETH_ALEN); 1220 /* u.deauth.reason_code == u.disassoc.reason_code */ 1221 mgmt->u.deauth.reason_code = cpu_to_le16(reason); 1222 1223 if (send_frame) { 1224 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 1225 IEEE80211_DEAUTH_FRAME_LEN); 1226 if (!skb) 1227 return; 1228 1229 skb_reserve(skb, local->hw.extra_tx_headroom); 1230 1231 /* copy in frame */ 1232 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN); 1233 1234 if (sdata->vif.type != NL80211_IFTYPE_STATION || 1235 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED)) 1236 IEEE80211_SKB_CB(skb)->flags |= 1237 IEEE80211_TX_INTFL_DONT_ENCRYPT; 1238 1239 ieee80211_tx_skb(sdata, skb); 1240 } 1241 } 1242 1243 static int ieee80211_put_s1g_cap(struct sk_buff *skb, 1244 struct ieee80211_sta_s1g_cap *s1g_cap) 1245 { 1246 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_s1g_cap)) 1247 return -ENOBUFS; 1248 1249 skb_put_u8(skb, WLAN_EID_S1G_CAPABILITIES); 1250 skb_put_u8(skb, sizeof(struct ieee80211_s1g_cap)); 1251 1252 skb_put_data(skb, &s1g_cap->cap, sizeof(s1g_cap->cap)); 1253 skb_put_data(skb, &s1g_cap->nss_mcs, sizeof(s1g_cap->nss_mcs)); 1254 1255 return 0; 1256 } 1257 1258 static int ieee80211_put_preq_ies_band(struct sk_buff *skb, 1259 struct ieee80211_sub_if_data *sdata, 1260 const u8 *ie, size_t ie_len, 1261 size_t *offset, 1262 enum nl80211_band band, 1263 u32 rate_mask, 1264 struct cfg80211_chan_def *chandef, 1265 u32 flags) 1266 { 1267 struct ieee80211_local *local = sdata->local; 1268 struct ieee80211_supported_band *sband; 1269 int i, err; 1270 size_t noffset; 1271 bool have_80mhz = false; 1272 1273 *offset = 0; 1274 1275 sband = local->hw.wiphy->bands[band]; 1276 if (WARN_ON_ONCE(!sband)) 1277 return 0; 1278 1279 /* For direct scan add S1G IE and consider its override bits */ 1280 if (band == NL80211_BAND_S1GHZ) 1281 return ieee80211_put_s1g_cap(skb, &sband->s1g_cap); 1282 1283 err = ieee80211_put_srates_elem(skb, sband, 0, 1284 ~rate_mask, WLAN_EID_SUPP_RATES); 1285 if (err) 1286 return err; 1287 1288 /* insert "request information" if in custom IEs */ 1289 if (ie && ie_len) { 1290 static const u8 before_extrates[] = { 1291 WLAN_EID_SSID, 1292 WLAN_EID_SUPP_RATES, 1293 WLAN_EID_REQUEST, 1294 }; 1295 noffset = ieee80211_ie_split(ie, ie_len, 1296 before_extrates, 1297 ARRAY_SIZE(before_extrates), 1298 *offset); 1299 if (skb_tailroom(skb) < noffset - *offset) 1300 return -ENOBUFS; 1301 skb_put_data(skb, ie + *offset, noffset - *offset); 1302 *offset = noffset; 1303 } 1304 1305 err = ieee80211_put_srates_elem(skb, sband, 0, 1306 ~rate_mask, WLAN_EID_EXT_SUPP_RATES); 1307 if (err) 1308 return err; 1309 1310 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) { 1311 if (skb_tailroom(skb) < 3) 1312 return -ENOBUFS; 1313 skb_put_u8(skb, WLAN_EID_DS_PARAMS); 1314 skb_put_u8(skb, 1); 1315 skb_put_u8(skb, 1316 ieee80211_frequency_to_channel(chandef->chan->center_freq)); 1317 } 1318 1319 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT) 1320 return 0; 1321 1322 /* insert custom IEs that go before HT */ 1323 if (ie && ie_len) { 1324 static const u8 before_ht[] = { 1325 /* 1326 * no need to list the ones split off already 1327 * (or generated here) 1328 */ 1329 WLAN_EID_DS_PARAMS, 1330 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1331 }; 1332 noffset = ieee80211_ie_split(ie, ie_len, 1333 before_ht, ARRAY_SIZE(before_ht), 1334 *offset); 1335 if (skb_tailroom(skb) < noffset - *offset) 1336 return -ENOBUFS; 1337 skb_put_data(skb, ie + *offset, noffset - *offset); 1338 *offset = noffset; 1339 } 1340 1341 if (sband->ht_cap.ht_supported) { 1342 u8 *pos; 1343 1344 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_ht_cap)) 1345 return -ENOBUFS; 1346 1347 pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_cap)); 1348 ieee80211_ie_build_ht_cap(pos, &sband->ht_cap, 1349 sband->ht_cap.cap); 1350 } 1351 1352 /* insert custom IEs that go before VHT */ 1353 if (ie && ie_len) { 1354 static const u8 before_vht[] = { 1355 /* 1356 * no need to list the ones split off already 1357 * (or generated here) 1358 */ 1359 WLAN_EID_BSS_COEX_2040, 1360 WLAN_EID_EXT_CAPABILITY, 1361 WLAN_EID_SSID_LIST, 1362 WLAN_EID_CHANNEL_USAGE, 1363 WLAN_EID_INTERWORKING, 1364 WLAN_EID_MESH_ID, 1365 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1366 }; 1367 noffset = ieee80211_ie_split(ie, ie_len, 1368 before_vht, ARRAY_SIZE(before_vht), 1369 *offset); 1370 if (skb_tailroom(skb) < noffset - *offset) 1371 return -ENOBUFS; 1372 skb_put_data(skb, ie + *offset, noffset - *offset); 1373 *offset = noffset; 1374 } 1375 1376 /* Check if any channel in this sband supports at least 80 MHz */ 1377 for (i = 0; i < sband->n_channels; i++) { 1378 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 1379 IEEE80211_CHAN_NO_80MHZ)) 1380 continue; 1381 1382 have_80mhz = true; 1383 break; 1384 } 1385 1386 if (sband->vht_cap.vht_supported && have_80mhz) { 1387 u8 *pos; 1388 1389 if (skb_tailroom(skb) < 2 + sizeof(struct ieee80211_vht_cap)) 1390 return -ENOBUFS; 1391 1392 pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_cap)); 1393 ieee80211_ie_build_vht_cap(pos, &sband->vht_cap, 1394 sband->vht_cap.cap); 1395 } 1396 1397 /* insert custom IEs that go before HE */ 1398 if (ie && ie_len) { 1399 static const u8 before_he[] = { 1400 /* 1401 * no need to list the ones split off before VHT 1402 * or generated here 1403 */ 1404 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS, 1405 WLAN_EID_AP_CSN, 1406 /* TODO: add 11ah/11aj/11ak elements */ 1407 }; 1408 noffset = ieee80211_ie_split(ie, ie_len, 1409 before_he, ARRAY_SIZE(before_he), 1410 *offset); 1411 if (skb_tailroom(skb) < noffset - *offset) 1412 return -ENOBUFS; 1413 skb_put_data(skb, ie + *offset, noffset - *offset); 1414 *offset = noffset; 1415 } 1416 1417 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1418 IEEE80211_CHAN_NO_HE)) { 1419 err = ieee80211_put_he_cap(skb, sdata, sband, NULL); 1420 if (err) 1421 return err; 1422 } 1423 1424 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1425 IEEE80211_CHAN_NO_HE | 1426 IEEE80211_CHAN_NO_EHT)) { 1427 err = ieee80211_put_eht_cap(skb, sdata, sband, NULL); 1428 if (err) 1429 return err; 1430 } 1431 1432 err = ieee80211_put_he_6ghz_cap(skb, sdata, IEEE80211_SMPS_OFF); 1433 if (err) 1434 return err; 1435 1436 if (cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band), 1437 IEEE80211_CHAN_NO_UHR)) { 1438 err = ieee80211_put_uhr_cap(skb, sdata, sband); 1439 if (err) 1440 return err; 1441 } 1442 1443 /* 1444 * If adding more here, adjust code in main.c 1445 * that calculates local->scan_ies_len. 1446 */ 1447 1448 return 0; 1449 } 1450 1451 static int ieee80211_put_preq_ies(struct sk_buff *skb, 1452 struct ieee80211_sub_if_data *sdata, 1453 struct ieee80211_scan_ies *ie_desc, 1454 const u8 *ie, size_t ie_len, 1455 u8 bands_used, u32 *rate_masks, 1456 struct cfg80211_chan_def *chandef, 1457 u32 flags) 1458 { 1459 size_t custom_ie_offset = 0; 1460 int i, err; 1461 1462 memset(ie_desc, 0, sizeof(*ie_desc)); 1463 1464 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1465 if (bands_used & BIT(i)) { 1466 ie_desc->ies[i] = skb_tail_pointer(skb); 1467 err = ieee80211_put_preq_ies_band(skb, sdata, 1468 ie, ie_len, 1469 &custom_ie_offset, 1470 i, rate_masks[i], 1471 chandef, flags); 1472 if (err) 1473 return err; 1474 ie_desc->len[i] = skb_tail_pointer(skb) - 1475 ie_desc->ies[i]; 1476 } 1477 } 1478 1479 /* add any remaining custom IEs */ 1480 if (ie && ie_len) { 1481 if (WARN_ONCE(skb_tailroom(skb) < ie_len - custom_ie_offset, 1482 "not enough space for preq custom IEs\n")) 1483 return -ENOBUFS; 1484 ie_desc->common_ies = skb_tail_pointer(skb); 1485 skb_put_data(skb, ie + custom_ie_offset, 1486 ie_len - custom_ie_offset); 1487 ie_desc->common_ie_len = skb_tail_pointer(skb) - 1488 ie_desc->common_ies; 1489 } 1490 1491 return 0; 1492 }; 1493 1494 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer, 1495 size_t buffer_len, 1496 struct ieee80211_scan_ies *ie_desc, 1497 const u8 *ie, size_t ie_len, 1498 u8 bands_used, u32 *rate_masks, 1499 struct cfg80211_chan_def *chandef, 1500 u32 flags) 1501 { 1502 struct sk_buff *skb = alloc_skb(buffer_len, GFP_KERNEL); 1503 uintptr_t offs; 1504 int ret, i; 1505 u8 *start; 1506 1507 if (!skb) 1508 return -ENOMEM; 1509 1510 start = skb_tail_pointer(skb); 1511 memset(start, 0, skb_tailroom(skb)); 1512 ret = ieee80211_put_preq_ies(skb, sdata, ie_desc, ie, ie_len, 1513 bands_used, rate_masks, chandef, 1514 flags); 1515 if (ret < 0) { 1516 goto out; 1517 } 1518 1519 if (skb->len > buffer_len) { 1520 ret = -ENOBUFS; 1521 goto out; 1522 } 1523 1524 memcpy(buffer, start, skb->len); 1525 1526 /* adjust ie_desc for copy */ 1527 for (i = 0; i < NUM_NL80211_BANDS; i++) { 1528 offs = ie_desc->ies[i] - start; 1529 ie_desc->ies[i] = buffer + offs; 1530 } 1531 offs = ie_desc->common_ies - start; 1532 ie_desc->common_ies = buffer + offs; 1533 1534 ret = skb->len; 1535 out: 1536 consume_skb(skb); 1537 return ret; 1538 } 1539 1540 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata, 1541 const u8 *src, const u8 *dst, 1542 u32 ratemask, 1543 struct ieee80211_channel *chan, 1544 const u8 *ssid, size_t ssid_len, 1545 const u8 *ie, size_t ie_len, 1546 u32 flags) 1547 { 1548 struct ieee80211_local *local = sdata->local; 1549 struct cfg80211_chan_def chandef; 1550 struct sk_buff *skb; 1551 struct ieee80211_mgmt *mgmt; 1552 u32 rate_masks[NUM_NL80211_BANDS] = {}; 1553 struct ieee80211_scan_ies dummy_ie_desc; 1554 1555 /* 1556 * Do not send DS Channel parameter for directed probe requests 1557 * in order to maximize the chance that we get a response. Some 1558 * badly-behaved APs don't respond when this parameter is included. 1559 */ 1560 chandef.width = sdata->vif.bss_conf.chanreq.oper.width; 1561 if (flags & IEEE80211_PROBE_FLAG_DIRECTED) 1562 chandef.chan = NULL; 1563 else 1564 chandef.chan = chan; 1565 1566 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len, 1567 local->scan_ies_len + ie_len); 1568 if (!skb) 1569 return NULL; 1570 1571 rate_masks[chan->band] = ratemask; 1572 ieee80211_put_preq_ies(skb, sdata, &dummy_ie_desc, 1573 ie, ie_len, BIT(chan->band), 1574 rate_masks, &chandef, flags); 1575 1576 if (dst) { 1577 mgmt = (struct ieee80211_mgmt *) skb->data; 1578 memcpy(mgmt->da, dst, ETH_ALEN); 1579 memcpy(mgmt->bssid, dst, ETH_ALEN); 1580 } 1581 1582 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1583 1584 return skb; 1585 } 1586 1587 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata, 1588 struct ieee802_11_elems *elems, 1589 enum nl80211_band band, u32 *basic_rates) 1590 { 1591 struct ieee80211_supported_band *sband; 1592 size_t num_rates; 1593 u32 supp_rates; 1594 int i, j; 1595 1596 sband = sdata->local->hw.wiphy->bands[band]; 1597 if (WARN_ON(!sband)) 1598 return 1; 1599 1600 num_rates = sband->n_bitrates; 1601 supp_rates = 0; 1602 for (i = 0; i < elems->supp_rates_len + 1603 elems->ext_supp_rates_len; i++) { 1604 u8 rate = 0; 1605 int own_rate; 1606 bool is_basic; 1607 if (i < elems->supp_rates_len) 1608 rate = elems->supp_rates[i]; 1609 else if (elems->ext_supp_rates) 1610 rate = elems->ext_supp_rates 1611 [i - elems->supp_rates_len]; 1612 own_rate = 5 * (rate & 0x7f); 1613 is_basic = !!(rate & 0x80); 1614 1615 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY) 1616 continue; 1617 1618 for (j = 0; j < num_rates; j++) { 1619 int brate = sband->bitrates[j].bitrate; 1620 1621 if (brate == own_rate) { 1622 supp_rates |= BIT(j); 1623 if (basic_rates && is_basic) 1624 *basic_rates |= BIT(j); 1625 } 1626 } 1627 } 1628 return supp_rates; 1629 } 1630 1631 void ieee80211_stop_device(struct ieee80211_local *local, bool suspend) 1632 { 1633 local_bh_disable(); 1634 ieee80211_handle_queued_frames(local); 1635 local_bh_enable(); 1636 1637 ieee80211_led_radio(local, false); 1638 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO); 1639 1640 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1641 1642 flush_workqueue(local->workqueue); 1643 wiphy_work_flush(local->hw.wiphy, NULL); 1644 drv_stop(local, suspend); 1645 } 1646 1647 static void ieee80211_flush_completed_scan(struct ieee80211_local *local, 1648 bool aborted) 1649 { 1650 /* It's possible that we don't handle the scan completion in 1651 * time during suspend, so if it's still marked as completed 1652 * here, queue the work and flush it to clean things up. 1653 * Instead of calling the worker function directly here, we 1654 * really queue it to avoid potential races with other flows 1655 * scheduling the same work. 1656 */ 1657 if (test_bit(SCAN_COMPLETED, &local->scanning)) { 1658 /* If coming from reconfiguration failure, abort the scan so 1659 * we don't attempt to continue a partial HW scan - which is 1660 * possible otherwise if (e.g.) the 2.4 GHz portion was the 1661 * completed scan, and a 5 GHz portion is still pending. 1662 */ 1663 if (aborted) 1664 set_bit(SCAN_ABORTED, &local->scanning); 1665 wiphy_delayed_work_queue(local->hw.wiphy, &local->scan_work, 0); 1666 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work); 1667 } 1668 } 1669 1670 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local) 1671 { 1672 struct ieee80211_sub_if_data *sdata; 1673 struct ieee80211_chanctx *ctx; 1674 1675 lockdep_assert_wiphy(local->hw.wiphy); 1676 1677 /* 1678 * We get here if during resume the device can't be restarted properly. 1679 * We might also get here if this happens during HW reset, which is a 1680 * slightly different situation and we need to drop all connections in 1681 * the latter case. 1682 * 1683 * Ask cfg80211 to turn off all interfaces, this will result in more 1684 * warnings but at least we'll then get into a clean stopped state. 1685 */ 1686 1687 local->resuming = false; 1688 local->suspended = false; 1689 local->in_reconfig = false; 1690 local->reconfig_failure = true; 1691 1692 ieee80211_flush_completed_scan(local, true); 1693 1694 /* scheduled scan clearly can't be running any more, but tell 1695 * cfg80211 and clear local state 1696 */ 1697 ieee80211_sched_scan_end(local); 1698 1699 list_for_each_entry(sdata, &local->interfaces, list) 1700 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER; 1701 1702 /* Mark channel contexts as not being in the driver any more to avoid 1703 * removing them from the driver during the shutdown process... 1704 */ 1705 list_for_each_entry(ctx, &local->chanctx_list, list) 1706 ctx->driver_present = false; 1707 } 1708 1709 static void ieee80211_assign_chanctx(struct ieee80211_local *local, 1710 struct ieee80211_sub_if_data *sdata, 1711 struct ieee80211_link_data *link) 1712 { 1713 struct ieee80211_chanctx_conf *conf; 1714 struct ieee80211_chanctx *ctx; 1715 1716 lockdep_assert_wiphy(local->hw.wiphy); 1717 1718 conf = rcu_dereference_protected(link->conf->chanctx_conf, 1719 lockdep_is_held(&local->hw.wiphy->mtx)); 1720 if (conf) { 1721 ctx = container_of(conf, struct ieee80211_chanctx, conf); 1722 drv_assign_vif_chanctx(local, sdata, link->conf, ctx); 1723 } 1724 } 1725 1726 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata) 1727 { 1728 struct ieee80211_local *local = sdata->local; 1729 struct sta_info *sta; 1730 1731 lockdep_assert_wiphy(local->hw.wiphy); 1732 1733 /* add STAs back */ 1734 list_for_each_entry(sta, &local->sta_list, list) { 1735 enum ieee80211_sta_state state; 1736 1737 if (!sta->uploaded || sta->sdata != sdata) 1738 continue; 1739 1740 for (state = IEEE80211_STA_NOTEXIST; 1741 state < sta->sta_state; state++) 1742 WARN_ON(drv_sta_state(local, sta->sdata, sta, state, 1743 state + 1)); 1744 } 1745 } 1746 1747 static int 1748 ieee80211_reconfig_nan_offload_de(struct ieee80211_sub_if_data *sdata) 1749 { 1750 struct cfg80211_nan_func *func, **funcs; 1751 int res, id, i = 0; 1752 1753 funcs = kzalloc_objs(*funcs, sdata->local->hw.max_nan_de_entries + 1); 1754 if (!funcs) 1755 return -ENOMEM; 1756 1757 /* Add all the functions: 1758 * This is a little bit ugly. We need to call a potentially sleeping 1759 * callback for each NAN function, so we can't hold the spinlock. 1760 */ 1761 spin_lock_bh(&sdata->u.nan.de.func_lock); 1762 1763 idr_for_each_entry(&sdata->u.nan.de.function_inst_ids, func, id) 1764 funcs[i++] = func; 1765 1766 spin_unlock_bh(&sdata->u.nan.de.func_lock); 1767 1768 for (i = 0; funcs[i]; i++) { 1769 res = drv_add_nan_func(sdata->local, sdata, funcs[i]); 1770 if (WARN_ON(res)) 1771 ieee80211_nan_func_terminated(&sdata->vif, 1772 funcs[i]->instance_id, 1773 NL80211_NAN_FUNC_TERM_REASON_ERROR, 1774 GFP_KERNEL); 1775 } 1776 1777 kfree(funcs); 1778 return res; 1779 } 1780 1781 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata) 1782 { 1783 struct ieee80211_local *local = sdata->local; 1784 struct ieee80211_sub_if_data *ndi_sdata; 1785 struct sta_info *sta; 1786 int res; 1787 1788 res = drv_start_nan(local, sdata, &sdata->u.nan.conf); 1789 if (WARN_ON(res)) 1790 return res; 1791 1792 if (!(sdata->local->hw.wiphy->nan_capa.flags & WIPHY_NAN_FLAGS_USERSPACE_DE)) 1793 return ieee80211_reconfig_nan_offload_de(sdata); 1794 1795 drv_vif_cfg_changed(sdata->local, sdata, BSS_CHANGED_NAN_LOCAL_SCHED); 1796 1797 /* Now we can add all the NDIs to the driver */ 1798 list_for_each_entry(ndi_sdata, &local->interfaces, list) { 1799 if (ndi_sdata->vif.type == NL80211_IFTYPE_NAN_DATA) { 1800 res = drv_add_interface(local, ndi_sdata); 1801 if (WARN_ON(res)) 1802 return res; 1803 } 1804 } 1805 1806 /* Add NMI stations (stations on the NAN interface) */ 1807 list_for_each_entry(sta, &local->sta_list, list) { 1808 enum ieee80211_sta_state state; 1809 1810 if (!sta->uploaded || sta->sdata != sdata) 1811 continue; 1812 1813 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; 1814 state++) { 1815 res = drv_sta_state(local, sdata, sta, state, 1816 state + 1); 1817 if (WARN_ON(res)) 1818 return res; 1819 } 1820 1821 /* Add peer schedules for NMI stations that have them */ 1822 if (!sta->sta.nan_sched) 1823 continue; 1824 1825 res = drv_nan_peer_sched_changed(local, sdata, sta); 1826 if (WARN_ON(res)) 1827 return res; 1828 } 1829 1830 /* Add NDI stations (stations on NAN_DATA interfaces) */ 1831 list_for_each_entry(sta, &local->sta_list, list) { 1832 enum ieee80211_sta_state state; 1833 1834 if (!sta->uploaded || 1835 sta->sdata->vif.type != NL80211_IFTYPE_NAN_DATA) 1836 continue; 1837 1838 if (WARN_ON(!sta->sta.nmi)) 1839 continue; 1840 1841 for (state = IEEE80211_STA_NOTEXIST; state < sta->sta_state; 1842 state++) { 1843 res = drv_sta_state(local, sta->sdata, sta, state, 1844 state + 1); 1845 if (WARN_ON(res)) 1846 return res; 1847 } 1848 } 1849 1850 return 0; 1851 } 1852 1853 static void ieee80211_reconfig_ap_links(struct ieee80211_local *local, 1854 struct ieee80211_sub_if_data *sdata, 1855 u64 changed) 1856 { 1857 int link_id; 1858 1859 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 1860 struct ieee80211_link_data *link; 1861 1862 if (!(sdata->vif.active_links & BIT(link_id))) 1863 continue; 1864 1865 link = sdata_dereference(sdata->link[link_id], sdata); 1866 if (!link) 1867 continue; 1868 1869 if (rcu_access_pointer(link->u.ap.beacon)) 1870 drv_start_ap(local, sdata, link->conf); 1871 1872 if (!link->conf->enable_beacon) 1873 continue; 1874 1875 changed |= BSS_CHANGED_BEACON | 1876 BSS_CHANGED_BEACON_ENABLED; 1877 1878 ieee80211_link_info_change_notify(sdata, link, changed); 1879 } 1880 } 1881 1882 int ieee80211_reconfig(struct ieee80211_local *local) 1883 { 1884 struct ieee80211_hw *hw = &local->hw; 1885 struct ieee80211_sub_if_data *sdata; 1886 struct ieee80211_chanctx *ctx; 1887 struct sta_info *sta; 1888 int res, i; 1889 bool reconfig_due_to_wowlan = false; 1890 struct ieee80211_sub_if_data *sched_scan_sdata; 1891 struct cfg80211_sched_scan_request *sched_scan_req; 1892 bool sched_scan_stopped = false; 1893 bool suspended = local->suspended; 1894 bool in_reconfig = false; 1895 1896 lockdep_assert_wiphy(local->hw.wiphy); 1897 1898 /* nothing to do if HW shouldn't run */ 1899 if (!local->open_count) 1900 goto wake_up; 1901 1902 #ifdef CONFIG_PM 1903 if (suspended) 1904 local->resuming = true; 1905 1906 if (local->wowlan) { 1907 /* 1908 * In the wowlan case, both mac80211 and the device 1909 * are functional when the resume op is called, so 1910 * clear local->suspended so the device could operate 1911 * normally (e.g. pass rx frames). 1912 */ 1913 local->suspended = false; 1914 res = drv_resume(local); 1915 local->wowlan = false; 1916 if (res < 0) { 1917 local->resuming = false; 1918 return res; 1919 } 1920 if (res == 0) 1921 goto wake_up; 1922 WARN_ON(res > 1); 1923 /* 1924 * res is 1, which means the driver requested 1925 * to go through a regular reset on wakeup. 1926 * restore local->suspended in this case. 1927 */ 1928 reconfig_due_to_wowlan = true; 1929 local->suspended = true; 1930 } 1931 #endif 1932 1933 /* 1934 * In case of hw_restart during suspend (without wowlan), 1935 * cancel restart work, as we are reconfiguring the device 1936 * anyway. 1937 * Note that restart_work is scheduled on a frozen workqueue, 1938 * so we can't deadlock in this case. 1939 */ 1940 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan) 1941 cancel_work_sync(&local->restart_work); 1942 1943 local->started = false; 1944 1945 /* 1946 * Upon resume hardware can sometimes be goofy due to 1947 * various platform / driver / bus issues, so restarting 1948 * the device may at times not work immediately. Propagate 1949 * the error. 1950 */ 1951 res = drv_start(local); 1952 if (res) { 1953 if (suspended) 1954 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n"); 1955 else 1956 WARN(1, "Hardware became unavailable during restart.\n"); 1957 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 1958 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 1959 false); 1960 ieee80211_handle_reconfig_failure(local); 1961 return res; 1962 } 1963 1964 /* setup fragmentation threshold */ 1965 drv_set_frag_threshold(local, -1, hw->wiphy->frag_threshold); 1966 1967 /* setup RTS threshold */ 1968 if (hw->wiphy->n_radio > 0) { 1969 for (i = 0; i < hw->wiphy->n_radio; i++) { 1970 u32 rts_threshold = 1971 hw->wiphy->radio_cfg[i].rts_threshold; 1972 1973 drv_set_rts_threshold(local, i, rts_threshold); 1974 } 1975 } else { 1976 drv_set_rts_threshold(local, -1, hw->wiphy->rts_threshold); 1977 } 1978 1979 /* reset coverage class */ 1980 drv_set_coverage_class(local, -1, hw->wiphy->coverage_class); 1981 1982 ieee80211_led_radio(local, true); 1983 ieee80211_mod_tpt_led_trig(local, 1984 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0); 1985 1986 /* add interfaces */ 1987 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 1988 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) { 1989 /* in HW restart it exists already */ 1990 WARN_ON(local->resuming); 1991 res = drv_add_interface(local, sdata); 1992 if (WARN_ON(res)) { 1993 RCU_INIT_POINTER(local->monitor_sdata, NULL); 1994 synchronize_net(); 1995 kfree(sdata); 1996 } 1997 } 1998 1999 list_for_each_entry(sdata, &local->interfaces, list) { 2000 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 2001 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 2002 continue; 2003 /* These vifs can't be added before NAN was started */ 2004 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 2005 continue; 2006 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2007 ieee80211_sdata_running(sdata)) { 2008 res = drv_add_interface(local, sdata); 2009 if (WARN_ON(res)) 2010 break; 2011 } 2012 } 2013 2014 /* If adding any of the interfaces failed above, roll back and 2015 * report failure. 2016 */ 2017 if (res) { 2018 list_for_each_entry_continue_reverse(sdata, &local->interfaces, 2019 list) { 2020 if (sdata->vif.type == NL80211_IFTYPE_MONITOR && 2021 !ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) 2022 continue; 2023 if (sdata->vif.type == NL80211_IFTYPE_NAN_DATA) 2024 continue; 2025 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN && 2026 ieee80211_sdata_running(sdata)) 2027 drv_remove_interface(local, sdata); 2028 } 2029 ieee80211_handle_reconfig_failure(local); 2030 return res; 2031 } 2032 2033 /* add channel contexts */ 2034 list_for_each_entry(ctx, &local->chanctx_list, list) 2035 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) 2036 WARN_ON(drv_add_chanctx(local, ctx)); 2037 2038 sdata = wiphy_dereference(local->hw.wiphy, local->monitor_sdata); 2039 if (sdata && ieee80211_sdata_running(sdata)) 2040 ieee80211_assign_chanctx(local, sdata, &sdata->deflink); 2041 2042 /* reconfigure hardware */ 2043 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_LISTEN_INTERVAL | 2044 IEEE80211_CONF_CHANGE_MONITOR | 2045 IEEE80211_CONF_CHANGE_PS | 2046 IEEE80211_CONF_CHANGE_RETRY_LIMITS | 2047 IEEE80211_CONF_CHANGE_IDLE); 2048 2049 ieee80211_configure_filter(local); 2050 2051 /* Finally also reconfigure all the BSS information */ 2052 list_for_each_entry(sdata, &local->interfaces, list) { 2053 /* common change flags for all interface types - link only */ 2054 u64 changed = BSS_CHANGED_ERP_CTS_PROT | 2055 BSS_CHANGED_ERP_PREAMBLE | 2056 BSS_CHANGED_ERP_SLOT | 2057 BSS_CHANGED_HT | 2058 BSS_CHANGED_BASIC_RATES | 2059 BSS_CHANGED_BEACON_INT | 2060 BSS_CHANGED_BSSID | 2061 BSS_CHANGED_CQM | 2062 BSS_CHANGED_QOS | 2063 BSS_CHANGED_TXPOWER | 2064 BSS_CHANGED_MCAST_RATE; 2065 struct ieee80211_link_data *link = NULL; 2066 unsigned int link_id; 2067 u32 active_links = 0; 2068 2069 if (!ieee80211_sdata_running(sdata)) 2070 continue; 2071 2072 if (ieee80211_vif_is_mld(&sdata->vif)) { 2073 struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS] = { 2074 [0] = &sdata->vif.bss_conf, 2075 }; 2076 2077 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 2078 /* start with a single active link */ 2079 active_links = sdata->vif.active_links; 2080 link_id = ffs(active_links) - 1; 2081 sdata->vif.active_links = BIT(link_id); 2082 } 2083 2084 drv_change_vif_links(local, sdata, 0, 2085 sdata->vif.active_links, 2086 old); 2087 } 2088 2089 sdata->restart_active_links = active_links; 2090 2091 for (link_id = 0; 2092 link_id < ARRAY_SIZE(sdata->vif.link_conf); 2093 link_id++) { 2094 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 2095 continue; 2096 2097 link = sdata_dereference(sdata->link[link_id], sdata); 2098 if (!link) 2099 continue; 2100 2101 ieee80211_assign_chanctx(local, sdata, link); 2102 } 2103 2104 switch (sdata->vif.type) { 2105 case NL80211_IFTYPE_AP_VLAN: 2106 case NL80211_IFTYPE_MONITOR: 2107 break; 2108 case NL80211_IFTYPE_NAN: 2109 case NL80211_IFTYPE_NAN_DATA: 2110 /* NAN stations are handled later */ 2111 break; 2112 case NL80211_IFTYPE_ADHOC: 2113 if (sdata->vif.cfg.ibss_joined) 2114 WARN_ON(drv_join_ibss(local, sdata)); 2115 fallthrough; 2116 default: 2117 ieee80211_reconfig_stations(sdata); 2118 fallthrough; 2119 case NL80211_IFTYPE_AP: /* AP stations are handled later */ 2120 for (i = 0; i < IEEE80211_NUM_ACS; i++) 2121 drv_conf_tx(local, &sdata->deflink, i, 2122 &sdata->deflink.tx_conf[i]); 2123 break; 2124 } 2125 2126 if (sdata->vif.bss_conf.mu_mimo_owner) 2127 changed |= BSS_CHANGED_MU_GROUPS; 2128 2129 if (!ieee80211_vif_is_mld(&sdata->vif)) 2130 changed |= BSS_CHANGED_IDLE; 2131 2132 switch (sdata->vif.type) { 2133 case NL80211_IFTYPE_STATION: 2134 if (!ieee80211_vif_is_mld(&sdata->vif)) { 2135 changed |= BSS_CHANGED_ASSOC | 2136 BSS_CHANGED_ARP_FILTER | 2137 BSS_CHANGED_PS; 2138 2139 /* Re-send beacon info report to the driver */ 2140 if (sdata->deflink.u.mgd.have_beacon) 2141 changed |= BSS_CHANGED_BEACON_INFO; 2142 2143 if (sdata->vif.bss_conf.max_idle_period || 2144 sdata->vif.bss_conf.protected_keep_alive) 2145 changed |= BSS_CHANGED_KEEP_ALIVE; 2146 2147 ieee80211_bss_info_change_notify(sdata, 2148 changed); 2149 } else if (!WARN_ON(!link)) { 2150 if (link->conf->npca.enabled) 2151 changed |= BSS_CHANGED_NPCA; 2152 2153 ieee80211_link_info_change_notify(sdata, link, 2154 changed); 2155 changed = BSS_CHANGED_ASSOC | 2156 BSS_CHANGED_IDLE | 2157 BSS_CHANGED_PS | 2158 BSS_CHANGED_ARP_FILTER; 2159 ieee80211_vif_cfg_change_notify(sdata, changed); 2160 } 2161 break; 2162 case NL80211_IFTYPE_OCB: 2163 changed |= BSS_CHANGED_OCB; 2164 ieee80211_bss_info_change_notify(sdata, changed); 2165 break; 2166 case NL80211_IFTYPE_ADHOC: 2167 changed |= BSS_CHANGED_IBSS; 2168 fallthrough; 2169 case NL80211_IFTYPE_AP: 2170 changed |= BSS_CHANGED_P2P_PS; 2171 2172 if (ieee80211_vif_is_mld(&sdata->vif)) 2173 ieee80211_vif_cfg_change_notify(sdata, 2174 BSS_CHANGED_SSID); 2175 else 2176 changed |= BSS_CHANGED_SSID; 2177 2178 if (sdata->vif.bss_conf.ftm_responder == 1 && 2179 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2180 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2181 changed |= BSS_CHANGED_FTM_RESPONDER; 2182 2183 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2184 changed |= BSS_CHANGED_AP_PROBE_RESP; 2185 2186 if (ieee80211_vif_is_mld(&sdata->vif)) { 2187 ieee80211_reconfig_ap_links(local, 2188 sdata, 2189 changed); 2190 break; 2191 } 2192 2193 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2194 drv_start_ap(local, sdata, 2195 sdata->deflink.conf); 2196 } 2197 fallthrough; 2198 case NL80211_IFTYPE_MESH_POINT: 2199 if (sdata->vif.bss_conf.enable_beacon) { 2200 changed |= BSS_CHANGED_BEACON | 2201 BSS_CHANGED_BEACON_ENABLED; 2202 ieee80211_bss_info_change_notify(sdata, changed); 2203 } 2204 break; 2205 case NL80211_IFTYPE_NAN: 2206 res = ieee80211_reconfig_nan(sdata); 2207 if (res < 0) { 2208 ieee80211_handle_reconfig_failure(local); 2209 return res; 2210 } 2211 break; 2212 case NL80211_IFTYPE_NAN_DATA: 2213 case NL80211_IFTYPE_AP_VLAN: 2214 case NL80211_IFTYPE_MONITOR: 2215 case NL80211_IFTYPE_P2P_DEVICE: 2216 case NL80211_IFTYPE_PD: 2217 /* nothing to do */ 2218 break; 2219 case NL80211_IFTYPE_UNSPECIFIED: 2220 case NUM_NL80211_IFTYPES: 2221 case NL80211_IFTYPE_P2P_CLIENT: 2222 case NL80211_IFTYPE_P2P_GO: 2223 case NL80211_IFTYPE_WDS: 2224 WARN_ON(1); 2225 break; 2226 } 2227 } 2228 2229 ieee80211_recalc_ps(local); 2230 2231 /* 2232 * The sta might be in psm against the ap (e.g. because 2233 * this was the state before a hw restart), so we 2234 * explicitly send a null packet in order to make sure 2235 * it'll sync against the ap (and get out of psm). 2236 */ 2237 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2238 list_for_each_entry(sdata, &local->interfaces, list) { 2239 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2240 continue; 2241 if (!sdata->u.mgd.associated) 2242 continue; 2243 2244 ieee80211_send_nullfunc(local, sdata, false); 2245 } 2246 } 2247 2248 /* APs are now beaconing, add back stations */ 2249 list_for_each_entry(sdata, &local->interfaces, list) { 2250 if (!ieee80211_sdata_running(sdata)) 2251 continue; 2252 2253 switch (sdata->vif.type) { 2254 case NL80211_IFTYPE_AP_VLAN: 2255 case NL80211_IFTYPE_AP: 2256 ieee80211_reconfig_stations(sdata); 2257 break; 2258 default: 2259 break; 2260 } 2261 } 2262 2263 /* add back keys */ 2264 list_for_each_entry(sdata, &local->interfaces, list) 2265 ieee80211_reenable_keys(sdata); 2266 2267 /* re-enable multi-link for client interfaces */ 2268 list_for_each_entry(sdata, &local->interfaces, list) { 2269 if (sdata->restart_active_links) 2270 ieee80211_set_active_links(&sdata->vif, 2271 sdata->restart_active_links); 2272 /* 2273 * If a link switch was scheduled before the restart, and ran 2274 * before reconfig, it will do nothing, so re-schedule. 2275 */ 2276 if (sdata->desired_active_links) 2277 wiphy_work_queue(sdata->local->hw.wiphy, 2278 &sdata->activate_links_work); 2279 } 2280 2281 /* Reconfigure sched scan if it was interrupted by FW restart */ 2282 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2283 lockdep_is_held(&local->hw.wiphy->mtx)); 2284 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2285 lockdep_is_held(&local->hw.wiphy->mtx)); 2286 if (sched_scan_sdata && sched_scan_req) 2287 /* 2288 * Sched scan stopped, but we don't want to report it. Instead, 2289 * we're trying to reschedule. However, if more than one scan 2290 * plan was set, we cannot reschedule since we don't know which 2291 * scan plan was currently running (and some scan plans may have 2292 * already finished). 2293 */ 2294 if (sched_scan_req->n_scan_plans > 1 || 2295 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2296 sched_scan_req)) { 2297 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2298 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2299 sched_scan_stopped = true; 2300 } 2301 2302 if (sched_scan_stopped) 2303 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2304 2305 wake_up: 2306 /* 2307 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2308 * sessions can be established after a resume. 2309 * 2310 * Also tear down aggregation sessions since reconfiguring 2311 * them in a hardware restart scenario is not easily done 2312 * right now, and the hardware will have lost information 2313 * about the sessions, but we and the AP still think they 2314 * are active. This is really a workaround though. 2315 */ 2316 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2317 list_for_each_entry(sta, &local->sta_list, list) { 2318 if (!local->resuming) 2319 ieee80211_sta_tear_down_BA_sessions( 2320 sta, AGG_STOP_LOCAL_REQUEST); 2321 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2322 } 2323 } 2324 2325 /* 2326 * If this is for hw restart things are still running. 2327 * We may want to change that later, however. 2328 */ 2329 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2330 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2331 2332 if (local->in_reconfig) { 2333 in_reconfig = local->in_reconfig; 2334 local->in_reconfig = false; 2335 barrier(); 2336 2337 ieee80211_reconfig_roc(local); 2338 2339 /* Requeue all works */ 2340 list_for_each_entry(sdata, &local->interfaces, list) { 2341 if (ieee80211_sdata_running(sdata)) 2342 wiphy_work_queue(local->hw.wiphy, &sdata->work); 2343 } 2344 } 2345 2346 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2347 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2348 false); 2349 2350 if (in_reconfig) { 2351 list_for_each_entry(sdata, &local->interfaces, list) { 2352 if (!ieee80211_sdata_running(sdata)) 2353 continue; 2354 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2355 ieee80211_sta_restart(sdata); 2356 } 2357 } 2358 2359 /* Passing NULL means an interface is picked for configuration */ 2360 if (local->virt_monitors > 0 && 2361 local->virt_monitors == local->open_count) 2362 ieee80211_add_virtual_monitor(local, NULL); 2363 2364 if (!suspended) 2365 return 0; 2366 2367 #ifdef CONFIG_PM 2368 /* first set suspended false, then resuming */ 2369 local->suspended = false; 2370 mb(); 2371 local->resuming = false; 2372 2373 ieee80211_flush_completed_scan(local, false); 2374 2375 if (local->open_count && !reconfig_due_to_wowlan) 2376 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2377 2378 list_for_each_entry(sdata, &local->interfaces, list) { 2379 if (!ieee80211_sdata_running(sdata)) 2380 continue; 2381 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2382 ieee80211_sta_restart(sdata); 2383 } 2384 2385 mod_timer(&local->sta_cleanup, jiffies + 1); 2386 #else 2387 WARN_ON(1); 2388 #endif 2389 2390 return 0; 2391 } 2392 2393 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2394 { 2395 struct ieee80211_sub_if_data *sdata; 2396 struct ieee80211_local *local; 2397 struct ieee80211_key *key; 2398 2399 if (WARN_ON(!vif)) 2400 return; 2401 2402 sdata = vif_to_sdata(vif); 2403 local = sdata->local; 2404 2405 lockdep_assert_wiphy(local->hw.wiphy); 2406 2407 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2408 !local->resuming)) 2409 return; 2410 2411 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2412 !local->in_reconfig)) 2413 return; 2414 2415 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2416 return; 2417 2418 sdata->flags |= flag; 2419 2420 list_for_each_entry(key, &sdata->key_list, list) 2421 key->flags |= KEY_FLAG_TAINTED; 2422 } 2423 2424 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2425 { 2426 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2427 } 2428 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2429 2430 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2431 { 2432 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2433 } 2434 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2435 2436 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2437 struct ieee80211_link_data *link) 2438 { 2439 struct ieee80211_local *local = sdata->local; 2440 struct ieee80211_chanctx_conf *chanctx_conf; 2441 struct ieee80211_chanctx *chanctx; 2442 2443 lockdep_assert_wiphy(local->hw.wiphy); 2444 2445 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2446 lockdep_is_held(&local->hw.wiphy->mtx)); 2447 2448 /* 2449 * This function can be called from a work, thus it may be possible 2450 * that the chanctx_conf is removed (due to a disconnection, for 2451 * example). 2452 * So nothing should be done in such case. 2453 */ 2454 if (!chanctx_conf) 2455 return; 2456 2457 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2458 ieee80211_recalc_smps_chanctx(local, chanctx); 2459 } 2460 2461 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2462 int link_id) 2463 { 2464 struct ieee80211_local *local = sdata->local; 2465 struct ieee80211_chanctx_conf *chanctx_conf; 2466 struct ieee80211_chanctx *chanctx; 2467 int i; 2468 2469 lockdep_assert_wiphy(local->hw.wiphy); 2470 2471 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2472 struct ieee80211_bss_conf *bss_conf; 2473 2474 if (link_id >= 0 && link_id != i) 2475 continue; 2476 2477 rcu_read_lock(); 2478 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2479 if (!bss_conf) { 2480 rcu_read_unlock(); 2481 continue; 2482 } 2483 2484 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2485 lockdep_is_held(&local->hw.wiphy->mtx)); 2486 /* 2487 * Since we hold the wiphy mutex (checked above) 2488 * we can take the chanctx_conf pointer out of the 2489 * RCU critical section, it cannot go away without 2490 * the mutex. Just the way we reached it could - in 2491 * theory - go away, but we don't really care and 2492 * it really shouldn't happen anyway. 2493 */ 2494 rcu_read_unlock(); 2495 2496 if (!chanctx_conf) 2497 return; 2498 2499 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2500 conf); 2501 ieee80211_recalc_chanctx_min_def(local, chanctx); 2502 } 2503 } 2504 2505 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2506 { 2507 size_t pos = offset; 2508 2509 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2510 pos += 2 + ies[pos + 1]; 2511 2512 return pos; 2513 } 2514 2515 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2516 u16 cap) 2517 { 2518 __le16 tmp; 2519 2520 *pos++ = WLAN_EID_HT_CAPABILITY; 2521 *pos++ = sizeof(struct ieee80211_ht_cap); 2522 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2523 2524 /* capability flags */ 2525 tmp = cpu_to_le16(cap); 2526 memcpy(pos, &tmp, sizeof(u16)); 2527 pos += sizeof(u16); 2528 2529 /* AMPDU parameters */ 2530 *pos++ = ht_cap->ampdu_factor | 2531 (ht_cap->ampdu_density << 2532 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2533 2534 /* MCS set */ 2535 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2536 pos += sizeof(ht_cap->mcs); 2537 2538 /* extended capabilities */ 2539 pos += sizeof(__le16); 2540 2541 /* BF capabilities */ 2542 pos += sizeof(__le32); 2543 2544 /* antenna selection */ 2545 pos += sizeof(u8); 2546 2547 return pos; 2548 } 2549 2550 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2551 u32 cap) 2552 { 2553 __le32 tmp; 2554 2555 *pos++ = WLAN_EID_VHT_CAPABILITY; 2556 *pos++ = sizeof(struct ieee80211_vht_cap); 2557 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2558 2559 /* capability flags */ 2560 tmp = cpu_to_le32(cap); 2561 memcpy(pos, &tmp, sizeof(u32)); 2562 pos += sizeof(u32); 2563 2564 /* VHT MCS set */ 2565 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2566 pos += sizeof(vht_cap->vht_mcs); 2567 2568 return pos; 2569 } 2570 2571 /* this may return more than ieee80211_put_he_6ghz_cap() will need */ 2572 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata) 2573 { 2574 const struct ieee80211_sta_he_cap *he_cap; 2575 struct ieee80211_supported_band *sband; 2576 u8 n; 2577 2578 sband = ieee80211_get_sband(sdata); 2579 if (!sband) 2580 return 0; 2581 2582 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2583 if (!he_cap) 2584 return 0; 2585 2586 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2587 return 2 + 1 + 2588 sizeof(he_cap->he_cap_elem) + n + 2589 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2590 he_cap->he_cap_elem.phy_cap_info); 2591 } 2592 2593 static void 2594 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn, 2595 const struct ieee80211_sta_he_cap *he_cap, 2596 struct ieee80211_he_cap_elem *elem) 2597 { 2598 u8 ru_limit, max_ru; 2599 2600 *elem = he_cap->he_cap_elem; 2601 2602 switch (conn->bw_limit) { 2603 case IEEE80211_CONN_BW_LIMIT_20: 2604 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242; 2605 break; 2606 case IEEE80211_CONN_BW_LIMIT_40: 2607 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484; 2608 break; 2609 case IEEE80211_CONN_BW_LIMIT_80: 2610 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996; 2611 break; 2612 default: 2613 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996; 2614 break; 2615 } 2616 2617 max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2618 max_ru = min(max_ru, ru_limit); 2619 elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2620 elem->phy_cap_info[8] |= max_ru; 2621 2622 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) { 2623 elem->phy_cap_info[0] &= 2624 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 2625 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 2626 elem->phy_cap_info[9] &= 2627 ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM; 2628 } 2629 2630 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 2631 elem->phy_cap_info[0] &= 2632 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 2633 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G); 2634 elem->phy_cap_info[5] &= 2635 ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK; 2636 elem->phy_cap_info[7] &= 2637 ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ | 2638 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ); 2639 } 2640 } 2641 2642 int ieee80211_put_he_cap(struct sk_buff *skb, 2643 struct ieee80211_sub_if_data *sdata, 2644 const struct ieee80211_supported_band *sband, 2645 const struct ieee80211_conn_settings *conn) 2646 { 2647 const struct ieee80211_sta_he_cap *he_cap; 2648 struct ieee80211_he_cap_elem elem; 2649 u8 *len; 2650 u8 n; 2651 u8 ie_len; 2652 2653 if (!conn) 2654 conn = &ieee80211_conn_settings_unlimited; 2655 2656 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2657 if (!he_cap) 2658 return 0; 2659 2660 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 2661 ieee80211_get_adjusted_he_cap(conn, he_cap, &elem); 2662 2663 n = ieee80211_he_mcs_nss_size(&elem); 2664 ie_len = 2 + 1 + 2665 sizeof(he_cap->he_cap_elem) + n + 2666 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2667 he_cap->he_cap_elem.phy_cap_info); 2668 2669 if (skb_tailroom(skb) < ie_len) 2670 return -ENOBUFS; 2671 2672 skb_put_u8(skb, WLAN_EID_EXTENSION); 2673 len = skb_put(skb, 1); /* We'll set the size later below */ 2674 skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY); 2675 2676 /* Fixed data */ 2677 skb_put_data(skb, &elem, sizeof(elem)); 2678 2679 skb_put_data(skb, &he_cap->he_mcs_nss_supp, n); 2680 2681 /* Check if PPE Threshold should be present */ 2682 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2683 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2684 goto end; 2685 2686 /* 2687 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2688 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2689 */ 2690 n = hweight8(he_cap->ppe_thres[0] & 2691 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2692 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2693 IEEE80211_PPE_THRES_NSS_POS)); 2694 2695 /* 2696 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2697 * total size. 2698 */ 2699 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2700 n = DIV_ROUND_UP(n, 8); 2701 2702 /* Copy PPE Thresholds */ 2703 skb_put_data(skb, &he_cap->ppe_thres, n); 2704 2705 end: 2706 *len = skb_tail_pointer(skb) - len - 1; 2707 return 0; 2708 } 2709 2710 int ieee80211_put_reg_conn(struct sk_buff *skb, 2711 enum ieee80211_channel_flags flags) 2712 { 2713 u8 reg_conn = IEEE80211_REG_CONN_LPI_VALID | 2714 IEEE80211_REG_CONN_LPI_VALUE | 2715 IEEE80211_REG_CONN_SP_VALID; 2716 2717 if (!(flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT)) 2718 reg_conn |= IEEE80211_REG_CONN_SP_VALUE; 2719 2720 skb_put_u8(skb, WLAN_EID_EXTENSION); 2721 skb_put_u8(skb, 1 + sizeof(reg_conn)); 2722 skb_put_u8(skb, WLAN_EID_EXT_NON_AP_STA_REG_CON); 2723 skb_put_u8(skb, reg_conn); 2724 return 0; 2725 } 2726 2727 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb, 2728 struct ieee80211_sub_if_data *sdata, 2729 enum ieee80211_smps_mode smps_mode) 2730 { 2731 struct ieee80211_supported_band *sband; 2732 const struct ieee80211_sband_iftype_data *iftd; 2733 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2734 __le16 cap; 2735 2736 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 2737 BIT(NL80211_BAND_6GHZ), 2738 IEEE80211_CHAN_NO_HE)) 2739 return 0; 2740 2741 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2742 2743 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2744 if (!iftd) 2745 return 0; 2746 2747 /* Check for device HE 6 GHz capability before adding element */ 2748 if (!iftd->he_6ghz_capa.capa) 2749 return 0; 2750 2751 cap = iftd->he_6ghz_capa.capa; 2752 cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS); 2753 2754 switch (smps_mode) { 2755 case IEEE80211_SMPS_AUTOMATIC: 2756 case IEEE80211_SMPS_NUM_MODES: 2757 WARN_ON(1); 2758 fallthrough; 2759 case IEEE80211_SMPS_OFF: 2760 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 2761 IEEE80211_HE_6GHZ_CAP_SM_PS); 2762 break; 2763 case IEEE80211_SMPS_STATIC: 2764 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 2765 IEEE80211_HE_6GHZ_CAP_SM_PS); 2766 break; 2767 case IEEE80211_SMPS_DYNAMIC: 2768 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 2769 IEEE80211_HE_6GHZ_CAP_SM_PS); 2770 break; 2771 } 2772 2773 if (skb_tailroom(skb) < 2 + 1 + sizeof(cap)) 2774 return -ENOBUFS; 2775 2776 skb_put_u8(skb, WLAN_EID_EXTENSION); 2777 skb_put_u8(skb, 1 + sizeof(cap)); 2778 skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA); 2779 skb_put_data(skb, &cap, sizeof(cap)); 2780 return 0; 2781 } 2782 2783 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2784 const struct cfg80211_chan_def *chandef, 2785 u16 prot_mode, bool rifs_mode) 2786 { 2787 struct ieee80211_ht_operation *ht_oper; 2788 /* Build HT Information */ 2789 *pos++ = WLAN_EID_HT_OPERATION; 2790 *pos++ = sizeof(struct ieee80211_ht_operation); 2791 ht_oper = (struct ieee80211_ht_operation *)pos; 2792 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2793 chandef->chan->center_freq); 2794 switch (chandef->width) { 2795 case NL80211_CHAN_WIDTH_160: 2796 case NL80211_CHAN_WIDTH_80P80: 2797 case NL80211_CHAN_WIDTH_80: 2798 case NL80211_CHAN_WIDTH_40: 2799 if (chandef->center_freq1 > chandef->chan->center_freq) 2800 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2801 else 2802 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2803 break; 2804 case NL80211_CHAN_WIDTH_320: 2805 /* HT information element should not be included on 6GHz */ 2806 WARN_ON(1); 2807 return pos; 2808 default: 2809 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2810 break; 2811 } 2812 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2813 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2814 chandef->width != NL80211_CHAN_WIDTH_20) 2815 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2816 2817 if (rifs_mode) 2818 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2819 2820 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2821 ht_oper->stbc_param = 0x0000; 2822 2823 /* It seems that Basic MCS set and Supported MCS set 2824 are identical for the first 10 bytes */ 2825 memset(&ht_oper->basic_set, 0, 16); 2826 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2827 2828 return pos + sizeof(struct ieee80211_ht_operation); 2829 } 2830 2831 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2832 const struct cfg80211_chan_def *chandef) 2833 { 2834 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2835 *pos++ = 3; /* IE length */ 2836 /* New channel width */ 2837 switch (chandef->width) { 2838 case NL80211_CHAN_WIDTH_80: 2839 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2840 break; 2841 case NL80211_CHAN_WIDTH_160: 2842 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2843 break; 2844 case NL80211_CHAN_WIDTH_80P80: 2845 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2846 break; 2847 case NL80211_CHAN_WIDTH_320: 2848 /* The behavior is not defined for 320 MHz channels */ 2849 WARN_ON(1); 2850 fallthrough; 2851 default: 2852 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2853 } 2854 2855 /* new center frequency segment 0 */ 2856 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2857 /* new center frequency segment 1 */ 2858 if (chandef->center_freq2) 2859 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2860 else 2861 *pos++ = 0; 2862 } 2863 2864 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2865 const struct cfg80211_chan_def *chandef) 2866 { 2867 struct ieee80211_vht_operation *vht_oper; 2868 2869 *pos++ = WLAN_EID_VHT_OPERATION; 2870 *pos++ = sizeof(struct ieee80211_vht_operation); 2871 vht_oper = (struct ieee80211_vht_operation *)pos; 2872 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2873 chandef->center_freq1); 2874 if (chandef->center_freq2) 2875 vht_oper->center_freq_seg1_idx = 2876 ieee80211_frequency_to_channel(chandef->center_freq2); 2877 else 2878 vht_oper->center_freq_seg1_idx = 0x00; 2879 2880 switch (chandef->width) { 2881 case NL80211_CHAN_WIDTH_160: 2882 /* 2883 * Convert 160 MHz channel width to new style as interop 2884 * workaround. 2885 */ 2886 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2887 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2888 if (chandef->chan->center_freq < chandef->center_freq1) 2889 vht_oper->center_freq_seg0_idx -= 8; 2890 else 2891 vht_oper->center_freq_seg0_idx += 8; 2892 break; 2893 case NL80211_CHAN_WIDTH_80P80: 2894 /* 2895 * Convert 80+80 MHz channel width to new style as interop 2896 * workaround. 2897 */ 2898 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2899 break; 2900 case NL80211_CHAN_WIDTH_80: 2901 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2902 break; 2903 case NL80211_CHAN_WIDTH_320: 2904 /* VHT information element should not be included on 6GHz */ 2905 WARN_ON(1); 2906 return pos; 2907 default: 2908 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2909 break; 2910 } 2911 2912 /* don't require special VHT peer rates */ 2913 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2914 2915 return pos + sizeof(struct ieee80211_vht_operation); 2916 } 2917 2918 u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef) 2919 { 2920 struct ieee80211_he_operation *he_oper; 2921 struct ieee80211_he_6ghz_oper *he_6ghz_op; 2922 struct cfg80211_chan_def he_chandef; 2923 u32 he_oper_params; 2924 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 2925 2926 if (chandef->chan->band == NL80211_BAND_6GHZ) 2927 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 2928 2929 *pos++ = WLAN_EID_EXTENSION; 2930 *pos++ = ie_len; 2931 *pos++ = WLAN_EID_EXT_HE_OPERATION; 2932 2933 he_oper_params = 0; 2934 he_oper_params |= u32_encode_bits(1023, /* disabled */ 2935 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 2936 he_oper_params |= u32_encode_bits(1, 2937 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 2938 he_oper_params |= u32_encode_bits(1, 2939 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 2940 if (chandef->chan->band == NL80211_BAND_6GHZ) 2941 he_oper_params |= u32_encode_bits(1, 2942 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 2943 2944 he_oper = (struct ieee80211_he_operation *)pos; 2945 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 2946 2947 /* don't require special HE peer rates */ 2948 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 2949 pos += sizeof(struct ieee80211_he_operation); 2950 2951 if (chandef->chan->band != NL80211_BAND_6GHZ) 2952 goto out; 2953 2954 cfg80211_chandef_create(&he_chandef, chandef->chan, NL80211_CHAN_NO_HT); 2955 he_chandef.center_freq1 = chandef->center_freq1; 2956 he_chandef.center_freq2 = chandef->center_freq2; 2957 he_chandef.width = chandef->width; 2958 2959 /* TODO add VHT operational */ 2960 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 2961 he_6ghz_op->minrate = 6; /* 6 Mbps */ 2962 he_6ghz_op->primary = 2963 ieee80211_frequency_to_channel(he_chandef.chan->center_freq); 2964 he_6ghz_op->ccfs0 = 2965 ieee80211_frequency_to_channel(he_chandef.center_freq1); 2966 if (he_chandef.center_freq2) 2967 he_6ghz_op->ccfs1 = 2968 ieee80211_frequency_to_channel(he_chandef.center_freq2); 2969 else 2970 he_6ghz_op->ccfs1 = 0; 2971 2972 switch (he_chandef.width) { 2973 case NL80211_CHAN_WIDTH_320: 2974 /* Downgrade EHT 320 MHz BW to 160 MHz for HE and set new 2975 * center_freq1 2976 */ 2977 ieee80211_chandef_downgrade(&he_chandef, NULL); 2978 he_6ghz_op->ccfs0 = 2979 ieee80211_frequency_to_channel(he_chandef.center_freq1); 2980 fallthrough; 2981 case NL80211_CHAN_WIDTH_160: 2982 /* Convert 160 MHz channel width to new style as interop 2983 * workaround. 2984 */ 2985 he_6ghz_op->control = 2986 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 2987 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 2988 if (he_chandef.chan->center_freq < he_chandef.center_freq1) 2989 he_6ghz_op->ccfs0 -= 8; 2990 else 2991 he_6ghz_op->ccfs0 += 8; 2992 fallthrough; 2993 case NL80211_CHAN_WIDTH_80P80: 2994 he_6ghz_op->control = 2995 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 2996 break; 2997 case NL80211_CHAN_WIDTH_80: 2998 he_6ghz_op->control = 2999 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 3000 break; 3001 case NL80211_CHAN_WIDTH_40: 3002 he_6ghz_op->control = 3003 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3004 break; 3005 default: 3006 he_6ghz_op->control = 3007 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3008 break; 3009 } 3010 3011 pos += sizeof(struct ieee80211_he_6ghz_oper); 3012 3013 out: 3014 return pos; 3015 } 3016 3017 u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef, 3018 const struct ieee80211_sta_eht_cap *eht_cap) 3019 3020 { 3021 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss = 3022 &eht_cap->eht_mcs_nss_supp.only_20mhz; 3023 struct ieee80211_eht_operation *eht_oper; 3024 struct ieee80211_eht_operation_info *eht_oper_info; 3025 u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional); 3026 u8 eht_oper_info_len = 3027 offsetof(struct ieee80211_eht_operation_info, optional); 3028 u8 chan_width = 0; 3029 3030 *pos++ = WLAN_EID_EXTENSION; 3031 *pos++ = 1 + eht_oper_len + eht_oper_info_len; 3032 *pos++ = WLAN_EID_EXT_EHT_OPERATION; 3033 3034 eht_oper = (struct ieee80211_eht_operation *)pos; 3035 3036 memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss)); 3037 eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT; 3038 pos += eht_oper_len; 3039 3040 eht_oper_info = 3041 (struct ieee80211_eht_operation_info *)eht_oper->optional; 3042 3043 eht_oper_info->ccfs0 = 3044 ieee80211_frequency_to_channel(chandef->center_freq1); 3045 if (chandef->center_freq2) 3046 eht_oper_info->ccfs1 = 3047 ieee80211_frequency_to_channel(chandef->center_freq2); 3048 else 3049 eht_oper_info->ccfs1 = 0; 3050 3051 switch (chandef->width) { 3052 case NL80211_CHAN_WIDTH_320: 3053 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ; 3054 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3055 if (chandef->chan->center_freq < chandef->center_freq1) 3056 eht_oper_info->ccfs0 -= 16; 3057 else 3058 eht_oper_info->ccfs0 += 16; 3059 break; 3060 case NL80211_CHAN_WIDTH_160: 3061 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3062 if (chandef->chan->center_freq < chandef->center_freq1) 3063 eht_oper_info->ccfs0 -= 8; 3064 else 3065 eht_oper_info->ccfs0 += 8; 3066 fallthrough; 3067 case NL80211_CHAN_WIDTH_80P80: 3068 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ; 3069 break; 3070 case NL80211_CHAN_WIDTH_80: 3071 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ; 3072 break; 3073 case NL80211_CHAN_WIDTH_40: 3074 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ; 3075 break; 3076 default: 3077 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ; 3078 break; 3079 } 3080 eht_oper_info->control = chan_width; 3081 pos += eht_oper_info_len; 3082 3083 /* TODO: eht_oper_info->optional */ 3084 3085 return pos; 3086 } 3087 3088 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3089 struct cfg80211_chan_def *chandef) 3090 { 3091 enum nl80211_channel_type channel_type; 3092 3093 if (!ht_oper) 3094 return false; 3095 3096 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3097 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3098 channel_type = NL80211_CHAN_HT20; 3099 break; 3100 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3101 channel_type = NL80211_CHAN_HT40PLUS; 3102 break; 3103 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3104 channel_type = NL80211_CHAN_HT40MINUS; 3105 break; 3106 default: 3107 return false; 3108 } 3109 3110 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3111 return true; 3112 } 3113 3114 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3115 const struct ieee80211_vht_operation *oper, 3116 const struct ieee80211_ht_operation *htop, 3117 struct cfg80211_chan_def *chandef) 3118 { 3119 struct cfg80211_chan_def new = *chandef; 3120 int cf0, cf1; 3121 int ccfs0, ccfs1, ccfs2; 3122 int ccf0, ccf1; 3123 u32 vht_cap; 3124 bool support_80_80 = false; 3125 bool support_160 = false; 3126 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3127 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3128 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3129 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3130 3131 if (!oper || !htop) 3132 return false; 3133 3134 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3135 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3136 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3137 support_80_80 = ((vht_cap & 3138 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3139 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3140 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3141 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3142 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3143 ccfs0 = oper->center_freq_seg0_idx; 3144 ccfs1 = oper->center_freq_seg1_idx; 3145 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3146 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3147 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3148 3149 ccf0 = ccfs0; 3150 3151 /* if not supported, parse as though we didn't understand it */ 3152 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3153 ext_nss_bw_supp = 0; 3154 3155 /* 3156 * Cf. IEEE 802.11-2020 Table 9-272 - Setting of the Supported Channel 3157 * Width Set subfield and Extended NSS BW Support subfield at a STA 3158 * transmitting the VHT Capabilities Information field 3159 * 3160 * We really just consider that because it's inefficient to connect 3161 * at a higher bandwidth than we'll actually be able to use. 3162 */ 3163 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3164 default: 3165 case 0x00: 3166 ccf1 = 0; 3167 support_160 = false; 3168 support_80_80 = false; 3169 break; 3170 case 0x01: 3171 support_80_80 = false; 3172 fallthrough; 3173 case 0x02: 3174 case 0x03: 3175 ccf1 = ccfs2; 3176 break; 3177 case 0x10: 3178 ccf1 = ccfs1; 3179 break; 3180 case 0x11: 3181 case 0x12: 3182 if (!ccfs1) 3183 ccf1 = ccfs2; 3184 else 3185 ccf1 = ccfs1; 3186 break; 3187 case 0x13: 3188 case 0x20: 3189 case 0x23: 3190 ccf1 = ccfs1; 3191 break; 3192 } 3193 3194 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3195 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3196 3197 switch (oper->chan_width) { 3198 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3199 /* just use HT information directly */ 3200 break; 3201 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3202 new.width = NL80211_CHAN_WIDTH_80; 3203 new.center_freq1 = cf0; 3204 /* If needed, adjust based on the newer interop workaround. */ 3205 if (ccf1) { 3206 unsigned int diff; 3207 3208 diff = abs(ccf1 - ccf0); 3209 if ((diff == 8) && support_160) { 3210 new.width = NL80211_CHAN_WIDTH_160; 3211 new.center_freq1 = cf1; 3212 } else if ((diff > 8) && support_80_80) { 3213 new.width = NL80211_CHAN_WIDTH_80P80; 3214 new.center_freq2 = cf1; 3215 } 3216 } 3217 break; 3218 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3219 /* deprecated encoding */ 3220 new.width = NL80211_CHAN_WIDTH_160; 3221 new.center_freq1 = cf0; 3222 break; 3223 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3224 /* deprecated encoding */ 3225 new.width = NL80211_CHAN_WIDTH_80P80; 3226 new.center_freq1 = cf0; 3227 new.center_freq2 = cf1; 3228 break; 3229 default: 3230 return false; 3231 } 3232 3233 if (!cfg80211_chandef_valid(&new)) 3234 return false; 3235 3236 *chandef = new; 3237 return true; 3238 } 3239 3240 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info, 3241 struct cfg80211_chan_def *chandef) 3242 { 3243 chandef->center_freq1 = 3244 ieee80211_channel_to_frequency(info->ccfs0, 3245 chandef->chan->band); 3246 3247 switch (u8_get_bits(info->control, 3248 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3249 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3250 chandef->width = NL80211_CHAN_WIDTH_20; 3251 break; 3252 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3253 chandef->width = NL80211_CHAN_WIDTH_40; 3254 break; 3255 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3256 chandef->width = NL80211_CHAN_WIDTH_80; 3257 break; 3258 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3259 chandef->width = NL80211_CHAN_WIDTH_160; 3260 chandef->center_freq1 = 3261 ieee80211_channel_to_frequency(info->ccfs1, 3262 chandef->chan->band); 3263 break; 3264 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3265 chandef->width = NL80211_CHAN_WIDTH_320; 3266 chandef->center_freq1 = 3267 ieee80211_channel_to_frequency(info->ccfs1, 3268 chandef->chan->band); 3269 break; 3270 } 3271 } 3272 3273 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local, 3274 const struct ieee80211_he_operation *he_oper, 3275 const struct ieee80211_eht_operation *eht_oper, 3276 struct cfg80211_chan_def *chandef) 3277 { 3278 struct cfg80211_chan_def he_chandef = *chandef; 3279 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3280 u32 freq; 3281 3282 if (chandef->chan->band != NL80211_BAND_6GHZ) 3283 return true; 3284 3285 if (!he_oper) 3286 return false; 3287 3288 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3289 if (!he_6ghz_oper) 3290 return false; 3291 3292 /* 3293 * The EHT operation IE does not contain the primary channel so the 3294 * primary channel frequency should be taken from the 6 GHz operation 3295 * information. 3296 */ 3297 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3298 NL80211_BAND_6GHZ); 3299 he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq); 3300 3301 if (!he_chandef.chan) 3302 return false; 3303 3304 if (!eht_oper || 3305 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3306 switch (u8_get_bits(he_6ghz_oper->control, 3307 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3308 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3309 he_chandef.width = NL80211_CHAN_WIDTH_20; 3310 break; 3311 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3312 he_chandef.width = NL80211_CHAN_WIDTH_40; 3313 break; 3314 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3315 he_chandef.width = NL80211_CHAN_WIDTH_80; 3316 break; 3317 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3318 he_chandef.width = NL80211_CHAN_WIDTH_80; 3319 if (!he_6ghz_oper->ccfs1) 3320 break; 3321 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) 3322 he_chandef.width = NL80211_CHAN_WIDTH_160; 3323 else 3324 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3325 break; 3326 } 3327 3328 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3329 he_chandef.center_freq1 = 3330 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3331 NL80211_BAND_6GHZ); 3332 } else { 3333 he_chandef.center_freq1 = 3334 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3335 NL80211_BAND_6GHZ); 3336 he_chandef.center_freq2 = 3337 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3338 NL80211_BAND_6GHZ); 3339 } 3340 } else { 3341 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 3342 &he_chandef); 3343 he_chandef.punctured = 3344 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 3345 } 3346 3347 if (!cfg80211_chandef_valid(&he_chandef)) 3348 return false; 3349 3350 *chandef = he_chandef; 3351 3352 return true; 3353 } 3354 3355 bool ieee80211_chandef_s1g_oper(struct ieee80211_local *local, 3356 const struct ieee80211_s1g_oper_ie *oper, 3357 struct cfg80211_chan_def *chandef) 3358 { 3359 u32 oper_khz, pri_1mhz_khz, pri_2mhz_khz; 3360 3361 if (!oper) 3362 return false; 3363 3364 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3365 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3366 chandef->width = NL80211_CHAN_WIDTH_1; 3367 break; 3368 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3369 chandef->width = NL80211_CHAN_WIDTH_2; 3370 break; 3371 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3372 chandef->width = NL80211_CHAN_WIDTH_4; 3373 break; 3374 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3375 chandef->width = NL80211_CHAN_WIDTH_8; 3376 break; 3377 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3378 chandef->width = NL80211_CHAN_WIDTH_16; 3379 break; 3380 default: 3381 return false; 3382 } 3383 3384 chandef->s1g_primary_2mhz = false; 3385 3386 switch (u8_get_bits(oper->ch_width, S1G_OPER_CH_WIDTH_PRIMARY)) { 3387 case IEEE80211_S1G_PRI_CHANWIDTH_1MHZ: 3388 pri_1mhz_khz = ieee80211_channel_to_freq_khz( 3389 oper->primary_ch, NL80211_BAND_S1GHZ); 3390 break; 3391 case IEEE80211_S1G_PRI_CHANWIDTH_2MHZ: 3392 chandef->s1g_primary_2mhz = true; 3393 pri_2mhz_khz = ieee80211_channel_to_freq_khz( 3394 oper->primary_ch, NL80211_BAND_S1GHZ); 3395 3396 if (u8_get_bits(oper->ch_width, S1G_OPER_CH_PRIMARY_LOCATION) == 3397 S1G_2M_PRIMARY_LOCATION_LOWER) 3398 pri_1mhz_khz = pri_2mhz_khz - 500; 3399 else 3400 pri_1mhz_khz = pri_2mhz_khz + 500; 3401 break; 3402 default: 3403 return false; 3404 } 3405 3406 oper_khz = ieee80211_channel_to_freq_khz(oper->oper_ch, 3407 NL80211_BAND_S1GHZ); 3408 chandef->center_freq1 = KHZ_TO_MHZ(oper_khz); 3409 chandef->freq1_offset = oper_khz % 1000; 3410 chandef->chan = 3411 ieee80211_get_channel_khz(local->hw.wiphy, pri_1mhz_khz); 3412 3413 return chandef->chan; 3414 } 3415 3416 int ieee80211_put_srates_elem(struct sk_buff *skb, 3417 const struct ieee80211_supported_band *sband, 3418 u32 basic_rates, u32 masked_rates, 3419 u8 element_id) 3420 { 3421 u8 i, rates, skip; 3422 3423 rates = 0; 3424 for (i = 0; i < sband->n_bitrates; i++) { 3425 if (masked_rates & BIT(i)) 3426 continue; 3427 rates++; 3428 } 3429 3430 if (element_id == WLAN_EID_SUPP_RATES) { 3431 rates = min_t(u8, rates, 8); 3432 skip = 0; 3433 } else { 3434 skip = 8; 3435 if (rates <= skip) 3436 return 0; 3437 rates -= skip; 3438 } 3439 3440 if (skb_tailroom(skb) < rates + 2) 3441 return -ENOBUFS; 3442 3443 skb_put_u8(skb, element_id); 3444 skb_put_u8(skb, rates); 3445 3446 for (i = 0; i < sband->n_bitrates && rates; i++) { 3447 int rate; 3448 u8 basic; 3449 3450 if (masked_rates & BIT(i)) 3451 continue; 3452 3453 if (skip > 0) { 3454 skip--; 3455 continue; 3456 } 3457 3458 basic = basic_rates & BIT(i) ? 0x80 : 0; 3459 3460 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 3461 skb_put_u8(skb, basic | (u8)rate); 3462 rates--; 3463 } 3464 3465 WARN(rates > 0, "rates confused: rates:%d, element:%d\n", 3466 rates, element_id); 3467 3468 return 0; 3469 } 3470 3471 int ieee80211_ave_rssi(struct ieee80211_vif *vif, int link_id) 3472 { 3473 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3474 struct ieee80211_link_data *link_data; 3475 3476 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3477 return 0; 3478 3479 if (link_id < 0) 3480 link_data = &sdata->deflink; 3481 else 3482 link_data = wiphy_dereference(sdata->local->hw.wiphy, 3483 sdata->link[link_id]); 3484 3485 if (WARN_ON_ONCE(!link_data)) 3486 return -99; 3487 3488 return -ewma_beacon_signal_read(&link_data->u.mgd.ave_beacon_signal); 3489 } 3490 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3491 3492 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3493 { 3494 if (!mcs) 3495 return 1; 3496 3497 /* TODO: consider rx_highest */ 3498 3499 if (mcs->rx_mask[3]) 3500 return 4; 3501 if (mcs->rx_mask[2]) 3502 return 3; 3503 if (mcs->rx_mask[1]) 3504 return 2; 3505 return 1; 3506 } 3507 3508 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_hw *hw, 3509 struct ieee80211_rx_status *status, 3510 unsigned int mpdu_len, 3511 unsigned int mpdu_offset) 3512 { 3513 u64 ts = status->mactime; 3514 bool mactime_plcp_start; 3515 struct rate_info ri; 3516 u16 rate; 3517 u8 n_ltf; 3518 3519 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3520 return 0; 3521 3522 mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) == 3523 RX_FLAG_MACTIME_PLCP_START; 3524 3525 memset(&ri, 0, sizeof(ri)); 3526 3527 ri.bw = status->bw; 3528 3529 /* Fill cfg80211 rate info */ 3530 switch (status->encoding) { 3531 case RX_ENC_EHT: 3532 ri.flags |= RATE_INFO_FLAGS_EHT_MCS; 3533 ri.mcs = status->rate_idx; 3534 ri.nss = status->nss; 3535 ri.eht_ru_alloc = status->eht.ru; 3536 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3537 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3538 /* TODO/FIXME: is this right? handle other PPDUs */ 3539 if (mactime_plcp_start) { 3540 mpdu_offset += 2; 3541 ts += 36; 3542 } 3543 break; 3544 case RX_ENC_HE: 3545 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3546 ri.mcs = status->rate_idx; 3547 ri.nss = status->nss; 3548 ri.he_ru_alloc = status->he_ru; 3549 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3550 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3551 3552 /* 3553 * See P802.11ax_D6.0, section 27.3.4 for 3554 * VHT PPDU format. 3555 */ 3556 if (mactime_plcp_start) { 3557 mpdu_offset += 2; 3558 ts += 36; 3559 3560 /* 3561 * TODO: 3562 * For HE MU PPDU, add the HE-SIG-B. 3563 * For HE ER PPDU, add 8us for the HE-SIG-A. 3564 * For HE TB PPDU, add 4us for the HE-STF. 3565 * Add the HE-LTF durations - variable. 3566 */ 3567 } 3568 3569 break; 3570 case RX_ENC_HT: 3571 ri.mcs = status->rate_idx; 3572 ri.flags |= RATE_INFO_FLAGS_MCS; 3573 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3574 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3575 3576 /* 3577 * See P802.11REVmd_D3.0, section 19.3.2 for 3578 * HT PPDU format. 3579 */ 3580 if (mactime_plcp_start) { 3581 mpdu_offset += 2; 3582 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3583 ts += 24; 3584 else 3585 ts += 32; 3586 3587 /* 3588 * Add Data HT-LTFs per streams 3589 * TODO: add Extension HT-LTFs, 4us per LTF 3590 */ 3591 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3592 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3593 ts += n_ltf * 4; 3594 } 3595 3596 break; 3597 case RX_ENC_VHT: 3598 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3599 ri.mcs = status->rate_idx; 3600 ri.nss = status->nss; 3601 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3602 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3603 3604 /* 3605 * See P802.11REVmd_D3.0, section 21.3.2 for 3606 * VHT PPDU format. 3607 */ 3608 if (mactime_plcp_start) { 3609 mpdu_offset += 2; 3610 ts += 36; 3611 3612 /* 3613 * Add VHT-LTFs per streams 3614 */ 3615 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3616 ri.nss + 1 : ri.nss; 3617 ts += 4 * n_ltf; 3618 } 3619 3620 break; 3621 default: 3622 WARN_ON(1); 3623 fallthrough; 3624 case RX_ENC_LEGACY: { 3625 struct ieee80211_supported_band *sband; 3626 3627 sband = hw->wiphy->bands[status->band]; 3628 ri.legacy = sband->bitrates[status->rate_idx].bitrate; 3629 3630 if (mactime_plcp_start) { 3631 if (status->band == NL80211_BAND_5GHZ) { 3632 ts += 20; 3633 mpdu_offset += 2; 3634 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3635 ts += 96; 3636 } else { 3637 ts += 192; 3638 } 3639 } 3640 break; 3641 } 3642 } 3643 3644 rate = cfg80211_calculate_bitrate(&ri); 3645 if (WARN_ONCE(!rate, 3646 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3647 (unsigned long long)status->flag, status->rate_idx, 3648 status->nss)) 3649 return 0; 3650 3651 /* rewind from end of MPDU */ 3652 if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END) 3653 ts -= mpdu_len * 8 * 10 / rate; 3654 3655 ts += mpdu_offset * 8 * 10 / rate; 3656 3657 return ts; 3658 } 3659 EXPORT_SYMBOL_GPL(ieee80211_calculate_rx_timestamp); 3660 3661 /* Cancel CAC for the interfaces under the specified @local. If @ctx is 3662 * also provided, only the interfaces using that ctx will be canceled. 3663 */ 3664 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local, 3665 struct ieee80211_chanctx *ctx) 3666 { 3667 struct ieee80211_sub_if_data *sdata; 3668 struct cfg80211_chan_def chandef; 3669 struct ieee80211_link_data *link; 3670 struct ieee80211_chanctx_conf *chanctx_conf; 3671 unsigned int link_id; 3672 3673 lockdep_assert_wiphy(local->hw.wiphy); 3674 3675 list_for_each_entry(sdata, &local->interfaces, list) { 3676 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3677 link_id++) { 3678 link = sdata_dereference(sdata->link[link_id], 3679 sdata); 3680 if (!link) 3681 continue; 3682 3683 chanctx_conf = sdata_dereference(link->conf->chanctx_conf, 3684 sdata); 3685 if (ctx && &ctx->conf != chanctx_conf) 3686 continue; 3687 3688 wiphy_hrtimer_work_cancel(local->hw.wiphy, 3689 &link->dfs_cac_timer_work); 3690 3691 if (!sdata->wdev.links[link_id].cac_started) 3692 continue; 3693 3694 chandef = link->conf->chanreq.oper; 3695 ieee80211_link_release_channel(link); 3696 cfg80211_cac_event(sdata->dev, &chandef, 3697 NL80211_RADAR_CAC_ABORTED, 3698 GFP_KERNEL, link_id); 3699 } 3700 } 3701 } 3702 3703 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy, 3704 struct wiphy_work *work) 3705 { 3706 struct ieee80211_local *local = 3707 container_of(work, struct ieee80211_local, radar_detected_work); 3708 struct cfg80211_chan_def chandef; 3709 struct ieee80211_chanctx *ctx, *tmp; 3710 3711 lockdep_assert_wiphy(local->hw.wiphy); 3712 3713 list_for_each_entry_safe(ctx, tmp, &local->chanctx_list, list) { 3714 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3715 continue; 3716 3717 if (!ctx->radar_detected) 3718 continue; 3719 3720 ctx->radar_detected = false; 3721 3722 chandef = ctx->conf.def; 3723 3724 ieee80211_dfs_cac_cancel(local, ctx); 3725 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3726 } 3727 } 3728 3729 static void 3730 ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw, 3731 struct ieee80211_chanctx_conf *chanctx_conf, 3732 void *data) 3733 { 3734 struct ieee80211_chanctx *ctx = 3735 container_of(chanctx_conf, struct ieee80211_chanctx, 3736 conf); 3737 3738 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3739 return; 3740 3741 if (data && data != chanctx_conf) 3742 return; 3743 3744 ctx->radar_detected = true; 3745 } 3746 3747 void ieee80211_radar_detected(struct ieee80211_hw *hw, 3748 struct ieee80211_chanctx_conf *chanctx_conf) 3749 { 3750 struct ieee80211_local *local = hw_to_local(hw); 3751 3752 trace_api_radar_detected(local); 3753 3754 ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator, 3755 chanctx_conf); 3756 3757 wiphy_work_queue(hw->wiphy, &local->radar_detected_work); 3758 } 3759 EXPORT_SYMBOL(ieee80211_radar_detected); 3760 3761 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c, 3762 struct ieee80211_conn_settings *conn) 3763 { 3764 enum nl80211_chan_width new_primary_width; 3765 struct ieee80211_conn_settings _ignored = {}; 3766 3767 /* allow passing NULL if caller doesn't care */ 3768 if (!conn) 3769 conn = &_ignored; 3770 3771 again: 3772 /* no-HT indicates nothing to do */ 3773 new_primary_width = NL80211_CHAN_WIDTH_20_NOHT; 3774 3775 switch (c->width) { 3776 default: 3777 case NL80211_CHAN_WIDTH_20_NOHT: 3778 WARN_ON_ONCE(1); 3779 fallthrough; 3780 case NL80211_CHAN_WIDTH_20: 3781 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3782 conn->mode = IEEE80211_CONN_MODE_LEGACY; 3783 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3784 c->punctured = 0; 3785 break; 3786 case NL80211_CHAN_WIDTH_40: 3787 c->width = NL80211_CHAN_WIDTH_20; 3788 c->center_freq1 = c->chan->center_freq; 3789 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3790 conn->mode = IEEE80211_CONN_MODE_HT; 3791 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3792 c->punctured = 0; 3793 break; 3794 case NL80211_CHAN_WIDTH_80: 3795 new_primary_width = NL80211_CHAN_WIDTH_40; 3796 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3797 conn->mode = IEEE80211_CONN_MODE_HT; 3798 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40; 3799 break; 3800 case NL80211_CHAN_WIDTH_80P80: 3801 c->center_freq2 = 0; 3802 c->width = NL80211_CHAN_WIDTH_80; 3803 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3804 break; 3805 case NL80211_CHAN_WIDTH_160: 3806 new_primary_width = NL80211_CHAN_WIDTH_80; 3807 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3808 break; 3809 case NL80211_CHAN_WIDTH_320: 3810 new_primary_width = NL80211_CHAN_WIDTH_160; 3811 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 3812 break; 3813 case NL80211_CHAN_WIDTH_1: 3814 case NL80211_CHAN_WIDTH_2: 3815 case NL80211_CHAN_WIDTH_4: 3816 case NL80211_CHAN_WIDTH_8: 3817 case NL80211_CHAN_WIDTH_16: 3818 WARN_ON_ONCE(1); 3819 /* keep c->width */ 3820 conn->mode = IEEE80211_CONN_MODE_S1G; 3821 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3822 break; 3823 case NL80211_CHAN_WIDTH_5: 3824 case NL80211_CHAN_WIDTH_10: 3825 WARN_ON_ONCE(1); 3826 /* keep c->width */ 3827 conn->mode = IEEE80211_CONN_MODE_LEGACY; 3828 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3829 break; 3830 } 3831 3832 if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) { 3833 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width, 3834 &c->punctured); 3835 c->width = new_primary_width; 3836 } 3837 3838 /* whatever we do, downgrading removes NPCA */ 3839 c->npca_chan = NULL; 3840 c->npca_punctured = 0; 3841 3842 /* 3843 * With an 80 MHz channel, we might have the puncturing in the primary 3844 * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width. 3845 * In that case, downgrade again. 3846 */ 3847 if (!cfg80211_chandef_valid(c) && c->punctured) 3848 goto again; 3849 3850 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3851 } 3852 3853 enum nl80211_chan_width 3854 ieee80211_sta_rx_bw_to_chan_width(enum ieee80211_sta_rx_bandwidth bw) 3855 { 3856 switch (bw) { 3857 case IEEE80211_STA_RX_BW_20: 3858 return NL80211_CHAN_WIDTH_20; 3859 case IEEE80211_STA_RX_BW_40: 3860 return NL80211_CHAN_WIDTH_40; 3861 case IEEE80211_STA_RX_BW_80: 3862 return NL80211_CHAN_WIDTH_80; 3863 case IEEE80211_STA_RX_BW_160: 3864 return NL80211_CHAN_WIDTH_160; 3865 case IEEE80211_STA_RX_BW_320: 3866 return NL80211_CHAN_WIDTH_320; 3867 default: 3868 return NL80211_CHAN_WIDTH_20; 3869 } 3870 } 3871 3872 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3873 struct cfg80211_csa_settings *csa_settings) 3874 { 3875 int hdr_len = IEEE80211_MIN_ACTION_SIZE(chan_switch); 3876 struct sk_buff *skb; 3877 struct ieee80211_mgmt *mgmt; 3878 struct ieee80211_local *local = sdata->local; 3879 int freq; 3880 u8 *pos; 3881 3882 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3883 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3884 return -EOPNOTSUPP; 3885 3886 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3887 5 + /* channel switch announcement element */ 3888 3 + /* secondary channel offset element */ 3889 5 + /* wide bandwidth channel switch announcement */ 3890 8); /* mesh channel switch parameters element */ 3891 if (!skb) 3892 return -ENOMEM; 3893 3894 skb_reserve(skb, local->tx_headroom); 3895 mgmt = skb_put_zero(skb, hdr_len); 3896 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3897 IEEE80211_STYPE_ACTION); 3898 3899 eth_broadcast_addr(mgmt->da); 3900 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3901 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3902 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3903 } else { 3904 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3905 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3906 } 3907 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3908 mgmt->u.action.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3909 pos = skb_put(skb, 5); 3910 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3911 *pos++ = 3; /* IE length */ 3912 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3913 freq = csa_settings->chandef.chan->center_freq; 3914 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3915 *pos++ = csa_settings->count; /* count */ 3916 3917 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3918 enum nl80211_channel_type ch_type; 3919 3920 skb_put(skb, 3); 3921 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3922 *pos++ = 1; /* IE length */ 3923 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3924 if (ch_type == NL80211_CHAN_HT40PLUS) 3925 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3926 else 3927 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3928 } 3929 3930 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3931 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3932 3933 skb_put(skb, 8); 3934 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3935 *pos++ = 6; /* IE length */ 3936 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3937 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3938 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3939 *pos++ |= csa_settings->block_tx ? 3940 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3941 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3942 pos += 2; 3943 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3944 pos += 2; 3945 } 3946 3947 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3948 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3949 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3950 skb_put(skb, 5); 3951 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3952 } 3953 3954 ieee80211_tx_skb(sdata, skb); 3955 return 0; 3956 } 3957 3958 static bool 3959 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3960 { 3961 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3962 int skip; 3963 3964 if (end > 0) 3965 return false; 3966 3967 /* One shot NOA */ 3968 if (data->count[i] == 1) 3969 return false; 3970 3971 if (data->desc[i].interval == 0) 3972 return false; 3973 3974 /* End time is in the past, check for repetitions */ 3975 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3976 if (data->count[i] < 255) { 3977 if (data->count[i] <= skip) { 3978 data->count[i] = 0; 3979 return false; 3980 } 3981 3982 data->count[i] -= skip; 3983 } 3984 3985 data->desc[i].start += skip * data->desc[i].interval; 3986 3987 return true; 3988 } 3989 3990 static bool 3991 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3992 s32 *offset) 3993 { 3994 bool ret = false; 3995 int i; 3996 3997 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3998 s32 cur; 3999 4000 if (!data->count[i]) 4001 continue; 4002 4003 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 4004 ret = true; 4005 4006 cur = data->desc[i].start - tsf; 4007 if (cur > *offset) 4008 continue; 4009 4010 cur = data->desc[i].start + data->desc[i].duration - tsf; 4011 if (cur > *offset) 4012 *offset = cur; 4013 } 4014 4015 return ret; 4016 } 4017 4018 static u32 4019 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 4020 { 4021 s32 offset = 0; 4022 int tries = 0; 4023 /* 4024 * arbitrary limit, used to avoid infinite loops when combined NoA 4025 * descriptors cover the full time period. 4026 */ 4027 int max_tries = 5; 4028 4029 ieee80211_extend_absent_time(data, tsf, &offset); 4030 do { 4031 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4032 break; 4033 4034 tries++; 4035 } while (tries < max_tries); 4036 4037 return offset; 4038 } 4039 4040 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4041 { 4042 u32 next_offset = BIT(31) - 1; 4043 int i; 4044 4045 data->absent = 0; 4046 data->has_next_tsf = false; 4047 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4048 s32 start; 4049 4050 if (!data->count[i]) 4051 continue; 4052 4053 ieee80211_extend_noa_desc(data, tsf, i); 4054 start = data->desc[i].start - tsf; 4055 if (start <= 0) 4056 data->absent |= BIT(i); 4057 4058 if (next_offset > start) 4059 next_offset = start; 4060 4061 data->has_next_tsf = true; 4062 } 4063 4064 if (data->absent) 4065 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4066 4067 data->next_tsf = tsf + next_offset; 4068 } 4069 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4070 4071 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4072 struct ieee80211_noa_data *data, u32 tsf) 4073 { 4074 int ret = 0; 4075 int i; 4076 4077 memset(data, 0, sizeof(*data)); 4078 4079 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4080 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4081 4082 if (!desc->count || !desc->duration) 4083 continue; 4084 4085 data->count[i] = desc->count; 4086 data->desc[i].start = le32_to_cpu(desc->start_time); 4087 data->desc[i].duration = le32_to_cpu(desc->duration); 4088 data->desc[i].interval = le32_to_cpu(desc->interval); 4089 4090 if (data->count[i] > 1 && 4091 data->desc[i].interval < data->desc[i].duration) 4092 continue; 4093 4094 ieee80211_extend_noa_desc(data, tsf, i); 4095 ret++; 4096 } 4097 4098 if (ret) 4099 ieee80211_update_p2p_noa(data, tsf); 4100 4101 return ret; 4102 } 4103 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4104 4105 void ieee80211_recalc_dtim(struct ieee80211_sub_if_data *sdata, u64 tsf) 4106 { 4107 u64 dtim_count = 0; 4108 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4109 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4110 struct ps_data *ps; 4111 u8 bcns_from_dtim; 4112 4113 if (tsf == -1ULL || !beacon_int || !dtim_period) 4114 return; 4115 4116 if (sdata->vif.type == NL80211_IFTYPE_AP || 4117 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4118 if (!sdata->bss) 4119 return; 4120 4121 ps = &sdata->bss->ps; 4122 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4123 ps = &sdata->u.mesh.ps; 4124 } else { 4125 return; 4126 } 4127 4128 /* 4129 * actually finds last dtim_count, mac80211 will update in 4130 * __beacon_add_tim(). 4131 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4132 */ 4133 do_div(tsf, beacon_int); 4134 bcns_from_dtim = do_div(tsf, dtim_period); 4135 /* just had a DTIM */ 4136 if (!bcns_from_dtim) 4137 dtim_count = 0; 4138 else 4139 dtim_count = dtim_period - bcns_from_dtim; 4140 4141 ps->dtim_count = dtim_count; 4142 } 4143 4144 /* 4145 * Given a long beacon period, calculate the current index into 4146 * that period to determine the number of TSBTTs until the next TBTT. 4147 * It is completely valid to have a short beacon period that differs 4148 * from the dtim period (i.e a TBTT thats not a DTIM). 4149 */ 4150 void ieee80211_recalc_sb_count(struct ieee80211_sub_if_data *sdata, u64 tsf) 4151 { 4152 u32 sb_idx; 4153 struct ps_data *ps = &sdata->bss->ps; 4154 u8 lb_period = sdata->vif.bss_conf.s1g_long_beacon_period; 4155 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4156 4157 /* No mesh / IBSS support for short beaconing */ 4158 if (tsf == -1ULL || !lb_period || 4159 (sdata->vif.type != NL80211_IFTYPE_AP && 4160 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) 4161 return; 4162 4163 /* find the current TSBTT index in our lb_period */ 4164 do_div(tsf, beacon_int); 4165 sb_idx = do_div(tsf, lb_period); 4166 4167 /* num TSBTTs until the next TBTT */ 4168 ps->sb_count = sb_idx ? lb_period - sb_idx : 0; 4169 } 4170 4171 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4172 struct ieee80211_chanctx *ctx) 4173 { 4174 struct ieee80211_link_data *link; 4175 u8 radar_detect = 0; 4176 4177 lockdep_assert_wiphy(local->hw.wiphy); 4178 4179 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4180 return 0; 4181 4182 for_each_sdata_link(local, link) { 4183 if (rcu_access_pointer(link->conf->chanctx_conf) == &ctx->conf) { 4184 /* 4185 * An in-place reservation context should not have any 4186 * assigned links until it replaces the other context. 4187 */ 4188 WARN_ON(ctx->replace_state == 4189 IEEE80211_CHANCTX_REPLACES_OTHER); 4190 4191 if (link->radar_required) 4192 radar_detect |= 4193 BIT(link->conf->chanreq.oper.width); 4194 } 4195 4196 if (link->reserved_chanctx == ctx && 4197 link->reserved_radar_required) 4198 radar_detect |= BIT(link->reserved.oper.width); 4199 } 4200 4201 return radar_detect; 4202 } 4203 4204 bool ieee80211_is_radio_idx_in_scan_req(struct wiphy *wiphy, 4205 struct cfg80211_scan_request *scan_req, 4206 int radio_idx) 4207 { 4208 struct ieee80211_channel *chan; 4209 int i, chan_radio_idx; 4210 4211 for (i = 0; i < scan_req->n_channels; i++) { 4212 chan = scan_req->channels[i]; 4213 chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan); 4214 4215 /* The radio index either matched successfully, or an error 4216 * occurred. For example, if radio-level information is 4217 * missing, the same error value is returned. This 4218 * typically implies a single-radio setup, in which case 4219 * the operation should not be allowed. 4220 */ 4221 if (chan_radio_idx == radio_idx) 4222 return true; 4223 } 4224 4225 return false; 4226 } 4227 4228 static u32 4229 __ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata) 4230 { 4231 struct ieee80211_bss_conf *link_conf; 4232 struct ieee80211_chanctx_conf *conf; 4233 unsigned int link_id; 4234 u32 mask = 0; 4235 4236 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 4237 conf = sdata_dereference(link_conf->chanctx_conf, sdata); 4238 if (!conf || conf->radio_idx < 0) 4239 continue; 4240 4241 mask |= BIT(conf->radio_idx); 4242 } 4243 4244 return mask; 4245 } 4246 4247 u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev) 4248 { 4249 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 4250 4251 return __ieee80211_get_radio_mask(sdata); 4252 } 4253 4254 static bool 4255 ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx) 4256 { 4257 if (radio_idx < 0) 4258 return true; 4259 4260 return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx); 4261 } 4262 4263 static int 4264 ieee80211_fill_ifcomb_params(struct ieee80211_local *local, 4265 struct iface_combination_params *params, 4266 const struct cfg80211_chan_def *chandef, 4267 struct ieee80211_sub_if_data *sdata) 4268 { 4269 struct ieee80211_sub_if_data *sdata_iter; 4270 struct ieee80211_chanctx *ctx; 4271 int total = !!sdata; 4272 4273 list_for_each_entry(ctx, &local->chanctx_list, list) { 4274 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4275 continue; 4276 4277 if (params->radio_idx >= 0 && 4278 ctx->conf.radio_idx != params->radio_idx) 4279 continue; 4280 4281 params->radar_detect |= 4282 ieee80211_chanctx_radar_detect(local, ctx); 4283 4284 if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE && 4285 cfg80211_chandef_compatible(chandef, &ctx->conf.def)) 4286 continue; 4287 4288 params->num_different_channels++; 4289 } 4290 4291 list_for_each_entry(sdata_iter, &local->interfaces, list) { 4292 struct wireless_dev *wdev_iter; 4293 4294 wdev_iter = &sdata_iter->wdev; 4295 4296 if (sdata_iter == sdata || 4297 !ieee80211_sdata_running(sdata_iter) || 4298 cfg80211_iftype_allowed(local->hw.wiphy, 4299 wdev_iter->iftype, 0, 1)) 4300 continue; 4301 4302 if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx)) 4303 continue; 4304 4305 params->iftype_num[wdev_iter->iftype]++; 4306 total++; 4307 } 4308 4309 return total; 4310 } 4311 4312 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4313 const struct cfg80211_chan_def *chandef, 4314 enum ieee80211_chanctx_mode chanmode, 4315 u8 radar_detect, int radio_idx) 4316 { 4317 bool shared = chanmode == IEEE80211_CHANCTX_SHARED; 4318 struct ieee80211_local *local = sdata->local; 4319 enum nl80211_iftype iftype = sdata->wdev.iftype; 4320 struct iface_combination_params params = { 4321 .radar_detect = radar_detect, 4322 .radio_idx = radio_idx, 4323 }; 4324 int total; 4325 4326 lockdep_assert_wiphy(local->hw.wiphy); 4327 4328 if (WARN_ON(hweight32(radar_detect) > 1)) 4329 return -EINVAL; 4330 4331 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4332 !chandef->chan)) 4333 return -EINVAL; 4334 4335 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4336 return -EINVAL; 4337 4338 if (sdata->vif.type == NL80211_IFTYPE_AP || 4339 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4340 /* 4341 * always passing this is harmless, since it'll be the 4342 * same value that cfg80211 finds if it finds the same 4343 * interface ... and that's always allowed 4344 */ 4345 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4346 } 4347 4348 /* Always allow software iftypes */ 4349 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4350 if (radar_detect) 4351 return -EINVAL; 4352 return 0; 4353 } 4354 4355 if (chandef) 4356 params.num_different_channels = 1; 4357 4358 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4359 params.iftype_num[iftype] = 1; 4360 4361 total = ieee80211_fill_ifcomb_params(local, ¶ms, 4362 shared ? chandef : NULL, 4363 sdata); 4364 if (total == 1 && !params.radar_detect) 4365 return 0; 4366 4367 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4368 } 4369 4370 static void 4371 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4372 void *data) 4373 { 4374 u32 *max_num_different_channels = data; 4375 4376 *max_num_different_channels = max(*max_num_different_channels, 4377 c->num_different_channels); 4378 } 4379 4380 int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx) 4381 { 4382 u32 max_num_different_channels = 1; 4383 int err; 4384 struct iface_combination_params params = { 4385 .radio_idx = radio_idx, 4386 }; 4387 4388 lockdep_assert_wiphy(local->hw.wiphy); 4389 4390 ieee80211_fill_ifcomb_params(local, ¶ms, NULL, NULL); 4391 4392 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4393 ieee80211_iter_max_chans, 4394 &max_num_different_channels); 4395 if (err < 0) 4396 return err; 4397 4398 return max_num_different_channels; 4399 } 4400 4401 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4402 struct ieee80211_sta_s1g_cap *caps, 4403 struct sk_buff *skb) 4404 { 4405 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4406 struct ieee80211_s1g_cap s1g_capab; 4407 u8 *pos; 4408 int i; 4409 4410 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4411 return; 4412 4413 if (!caps->s1g) 4414 return; 4415 4416 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4417 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4418 4419 /* override the capability info */ 4420 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4421 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4422 4423 s1g_capab.capab_info[i] &= ~mask; 4424 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4425 } 4426 4427 /* then MCS and NSS set */ 4428 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4429 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4430 4431 s1g_capab.supp_mcs_nss[i] &= ~mask; 4432 s1g_capab.supp_mcs_nss[i] |= 4433 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4434 } 4435 4436 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4437 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4438 *pos++ = sizeof(s1g_capab); 4439 4440 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4441 } 4442 4443 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4444 struct sk_buff *skb) 4445 { 4446 u8 *pos = skb_put(skb, 3); 4447 4448 *pos++ = WLAN_EID_AID_REQUEST; 4449 *pos++ = 1; 4450 *pos++ = 0; 4451 } 4452 4453 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4454 { 4455 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4456 *buf++ = 7; /* len */ 4457 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4458 *buf++ = 0x50; 4459 *buf++ = 0xf2; 4460 *buf++ = 2; /* WME */ 4461 *buf++ = 0; /* WME info */ 4462 *buf++ = 1; /* WME ver */ 4463 *buf++ = qosinfo; /* U-APSD no in use */ 4464 4465 return buf; 4466 } 4467 4468 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4469 unsigned long *frame_cnt, 4470 unsigned long *byte_cnt) 4471 { 4472 struct txq_info *txqi = to_txq_info(txq); 4473 u32 frag_cnt = 0, frag_bytes = 0; 4474 struct sk_buff *skb; 4475 4476 skb_queue_walk(&txqi->frags, skb) { 4477 frag_cnt++; 4478 frag_bytes += skb->len; 4479 } 4480 4481 if (frame_cnt) 4482 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4483 4484 if (byte_cnt) 4485 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4486 } 4487 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4488 4489 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4490 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4491 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4492 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4493 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4494 }; 4495 4496 u16 ieee80211_encode_usf(int listen_interval) 4497 { 4498 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4499 u16 ui, usf = 0; 4500 4501 /* find greatest USF */ 4502 while (usf < IEEE80211_MAX_USF) { 4503 if (listen_interval % listen_int_usf[usf + 1]) 4504 break; 4505 usf += 1; 4506 } 4507 ui = listen_interval / listen_int_usf[usf]; 4508 4509 /* error if there is a remainder. Should've been checked by user */ 4510 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4511 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4512 FIELD_PREP(LISTEN_INT_UI, ui); 4513 4514 return (u16) listen_interval; 4515 } 4516 4517 /* this may return more than ieee80211_put_eht_cap() will need */ 4518 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata) 4519 { 4520 const struct ieee80211_sta_he_cap *he_cap; 4521 const struct ieee80211_sta_eht_cap *eht_cap; 4522 struct ieee80211_supported_band *sband; 4523 bool is_ap; 4524 u8 n; 4525 4526 sband = ieee80211_get_sband(sdata); 4527 if (!sband) 4528 return 0; 4529 4530 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4531 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4532 if (!he_cap || !eht_cap) 4533 return 0; 4534 4535 is_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4536 4537 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4538 &eht_cap->eht_cap_elem, 4539 is_ap); 4540 return 2 + 1 + 4541 sizeof(eht_cap->eht_cap_elem) + n + 4542 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4543 eht_cap->eht_cap_elem.phy_cap_info); 4544 return 0; 4545 } 4546 4547 int ieee80211_put_eht_cap(struct sk_buff *skb, 4548 struct ieee80211_sub_if_data *sdata, 4549 const struct ieee80211_supported_band *sband, 4550 const struct ieee80211_conn_settings *conn) 4551 { 4552 const struct ieee80211_sta_he_cap *he_cap = 4553 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4554 const struct ieee80211_sta_eht_cap *eht_cap = 4555 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4556 bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4557 struct ieee80211_eht_cap_elem_fixed fixed; 4558 struct ieee80211_he_cap_elem he; 4559 u8 mcs_nss_len, ppet_len; 4560 u8 orig_mcs_nss_len; 4561 u8 ie_len; 4562 4563 if (!conn) 4564 conn = &ieee80211_conn_settings_unlimited; 4565 4566 /* Make sure we have place for the IE */ 4567 if (!he_cap || !eht_cap) 4568 return 0; 4569 4570 orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4571 &eht_cap->eht_cap_elem, 4572 for_ap); 4573 4574 ieee80211_get_adjusted_he_cap(conn, he_cap, &he); 4575 4576 fixed = eht_cap->eht_cap_elem; 4577 4578 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80) 4579 fixed.phy_cap_info[6] &= 4580 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ; 4581 4582 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 4583 fixed.phy_cap_info[1] &= 4584 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK; 4585 fixed.phy_cap_info[2] &= 4586 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK; 4587 fixed.phy_cap_info[6] &= 4588 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ; 4589 } 4590 4591 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) { 4592 fixed.phy_cap_info[0] &= 4593 ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 4594 fixed.phy_cap_info[1] &= 4595 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK; 4596 fixed.phy_cap_info[2] &= 4597 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK; 4598 fixed.phy_cap_info[6] &= 4599 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ; 4600 } 4601 4602 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) 4603 fixed.phy_cap_info[0] &= 4604 ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ; 4605 4606 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap); 4607 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4608 fixed.phy_cap_info); 4609 4610 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4611 if (skb_tailroom(skb) < ie_len) 4612 return -ENOBUFS; 4613 4614 skb_put_u8(skb, WLAN_EID_EXTENSION); 4615 skb_put_u8(skb, ie_len - 2); 4616 skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY); 4617 skb_put_data(skb, &fixed, sizeof(fixed)); 4618 4619 if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) { 4620 /* 4621 * If the (non-AP) STA became 20 MHz only, then convert from 4622 * <=80 to 20-MHz-only format, where MCSes are indicated in 4623 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9, 4624 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9. 4625 */ 4626 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4627 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4628 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss); 4629 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss); 4630 } else { 4631 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4632 } 4633 4634 if (ppet_len) 4635 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len); 4636 4637 return 0; 4638 } 4639 4640 int ieee80211_put_uhr_cap(struct sk_buff *skb, 4641 struct ieee80211_sub_if_data *sdata, 4642 const struct ieee80211_supported_band *sband) 4643 { 4644 const struct ieee80211_sta_uhr_cap *uhr_cap = 4645 ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 4646 int len; 4647 4648 if (!uhr_cap) 4649 return 0; 4650 4651 len = 2 + 1 + sizeof(struct ieee80211_uhr_cap); 4652 4653 if (skb_tailroom(skb) < len) 4654 return -ENOBUFS; 4655 4656 skb_put_u8(skb, WLAN_EID_EXTENSION); 4657 skb_put_u8(skb, len - 2); 4658 skb_put_u8(skb, WLAN_EID_EXT_UHR_CAPA); 4659 skb_put_data(skb, &uhr_cap->mac, sizeof(uhr_cap->mac)); 4660 skb_put_data(skb, &uhr_cap->phy, sizeof(uhr_cap->phy)); 4661 4662 return 0; 4663 } 4664 4665 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode) 4666 { 4667 static const char * const modes[] = { 4668 [IEEE80211_CONN_MODE_S1G] = "S1G", 4669 [IEEE80211_CONN_MODE_LEGACY] = "legacy", 4670 [IEEE80211_CONN_MODE_HT] = "HT", 4671 [IEEE80211_CONN_MODE_VHT] = "VHT", 4672 [IEEE80211_CONN_MODE_HE] = "HE", 4673 [IEEE80211_CONN_MODE_EHT] = "EHT", 4674 [IEEE80211_CONN_MODE_UHR] = "UHR", 4675 }; 4676 4677 if (WARN_ON(mode >= ARRAY_SIZE(modes))) 4678 return "<out of range>"; 4679 4680 return modes[mode] ?: "<missing string>"; 4681 } 4682 4683 enum ieee80211_conn_bw_limit 4684 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef) 4685 { 4686 switch (chandef->width) { 4687 case NL80211_CHAN_WIDTH_20_NOHT: 4688 case NL80211_CHAN_WIDTH_20: 4689 return IEEE80211_CONN_BW_LIMIT_20; 4690 case NL80211_CHAN_WIDTH_40: 4691 return IEEE80211_CONN_BW_LIMIT_40; 4692 case NL80211_CHAN_WIDTH_80: 4693 return IEEE80211_CONN_BW_LIMIT_80; 4694 case NL80211_CHAN_WIDTH_80P80: 4695 case NL80211_CHAN_WIDTH_160: 4696 return IEEE80211_CONN_BW_LIMIT_160; 4697 case NL80211_CHAN_WIDTH_320: 4698 return IEEE80211_CONN_BW_LIMIT_320; 4699 default: 4700 WARN(1, "unhandled chandef width %d\n", chandef->width); 4701 return IEEE80211_CONN_BW_LIMIT_20; 4702 } 4703 } 4704 4705 void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe) 4706 { 4707 for (int i = 0; i < 2; i++) { 4708 tpe->max_local[i].valid = false; 4709 memset(tpe->max_local[i].power, 4710 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4711 sizeof(tpe->max_local[i].power)); 4712 4713 tpe->max_reg_client[i].valid = false; 4714 memset(tpe->max_reg_client[i].power, 4715 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4716 sizeof(tpe->max_reg_client[i].power)); 4717 4718 tpe->psd_local[i].valid = false; 4719 memset(tpe->psd_local[i].power, 4720 IEEE80211_TPE_PSD_NO_LIMIT, 4721 sizeof(tpe->psd_local[i].power)); 4722 4723 tpe->psd_reg_client[i].valid = false; 4724 memset(tpe->psd_reg_client[i].power, 4725 IEEE80211_TPE_PSD_NO_LIMIT, 4726 sizeof(tpe->psd_reg_client[i].power)); 4727 } 4728 } 4729 4730 bool ieee80211_vif_nan_started(struct ieee80211_vif *vif) 4731 { 4732 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4733 4734 return vif->type == NL80211_IFTYPE_NAN && sdata->u.nan.started; 4735 } 4736 EXPORT_SYMBOL_GPL(ieee80211_vif_nan_started); 4737