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 ieee80211_link_info_change_notify(sdata, link, 2151 changed); 2152 changed = BSS_CHANGED_ASSOC | 2153 BSS_CHANGED_IDLE | 2154 BSS_CHANGED_PS | 2155 BSS_CHANGED_ARP_FILTER; 2156 ieee80211_vif_cfg_change_notify(sdata, changed); 2157 } 2158 break; 2159 case NL80211_IFTYPE_OCB: 2160 changed |= BSS_CHANGED_OCB; 2161 ieee80211_bss_info_change_notify(sdata, changed); 2162 break; 2163 case NL80211_IFTYPE_ADHOC: 2164 changed |= BSS_CHANGED_IBSS; 2165 fallthrough; 2166 case NL80211_IFTYPE_AP: 2167 changed |= BSS_CHANGED_P2P_PS; 2168 2169 if (ieee80211_vif_is_mld(&sdata->vif)) 2170 ieee80211_vif_cfg_change_notify(sdata, 2171 BSS_CHANGED_SSID); 2172 else 2173 changed |= BSS_CHANGED_SSID; 2174 2175 if (sdata->vif.bss_conf.ftm_responder == 1 && 2176 wiphy_ext_feature_isset(sdata->local->hw.wiphy, 2177 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER)) 2178 changed |= BSS_CHANGED_FTM_RESPONDER; 2179 2180 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2181 changed |= BSS_CHANGED_AP_PROBE_RESP; 2182 2183 if (ieee80211_vif_is_mld(&sdata->vif)) { 2184 ieee80211_reconfig_ap_links(local, 2185 sdata, 2186 changed); 2187 break; 2188 } 2189 2190 if (rcu_access_pointer(sdata->deflink.u.ap.beacon)) 2191 drv_start_ap(local, sdata, 2192 sdata->deflink.conf); 2193 } 2194 fallthrough; 2195 case NL80211_IFTYPE_MESH_POINT: 2196 if (sdata->vif.bss_conf.enable_beacon) { 2197 changed |= BSS_CHANGED_BEACON | 2198 BSS_CHANGED_BEACON_ENABLED; 2199 ieee80211_bss_info_change_notify(sdata, changed); 2200 } 2201 break; 2202 case NL80211_IFTYPE_NAN: 2203 res = ieee80211_reconfig_nan(sdata); 2204 if (res < 0) { 2205 ieee80211_handle_reconfig_failure(local); 2206 return res; 2207 } 2208 break; 2209 case NL80211_IFTYPE_NAN_DATA: 2210 case NL80211_IFTYPE_AP_VLAN: 2211 case NL80211_IFTYPE_MONITOR: 2212 case NL80211_IFTYPE_P2P_DEVICE: 2213 /* nothing to do */ 2214 break; 2215 case NL80211_IFTYPE_UNSPECIFIED: 2216 case NUM_NL80211_IFTYPES: 2217 case NL80211_IFTYPE_P2P_CLIENT: 2218 case NL80211_IFTYPE_P2P_GO: 2219 case NL80211_IFTYPE_WDS: 2220 WARN_ON(1); 2221 break; 2222 } 2223 } 2224 2225 ieee80211_recalc_ps(local); 2226 2227 /* 2228 * The sta might be in psm against the ap (e.g. because 2229 * this was the state before a hw restart), so we 2230 * explicitly send a null packet in order to make sure 2231 * it'll sync against the ap (and get out of psm). 2232 */ 2233 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) { 2234 list_for_each_entry(sdata, &local->interfaces, list) { 2235 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2236 continue; 2237 if (!sdata->u.mgd.associated) 2238 continue; 2239 2240 ieee80211_send_nullfunc(local, sdata, false); 2241 } 2242 } 2243 2244 /* APs are now beaconing, add back stations */ 2245 list_for_each_entry(sdata, &local->interfaces, list) { 2246 if (!ieee80211_sdata_running(sdata)) 2247 continue; 2248 2249 switch (sdata->vif.type) { 2250 case NL80211_IFTYPE_AP_VLAN: 2251 case NL80211_IFTYPE_AP: 2252 ieee80211_reconfig_stations(sdata); 2253 break; 2254 default: 2255 break; 2256 } 2257 } 2258 2259 /* add back keys */ 2260 list_for_each_entry(sdata, &local->interfaces, list) 2261 ieee80211_reenable_keys(sdata); 2262 2263 /* re-enable multi-link for client interfaces */ 2264 list_for_each_entry(sdata, &local->interfaces, list) { 2265 if (sdata->restart_active_links) 2266 ieee80211_set_active_links(&sdata->vif, 2267 sdata->restart_active_links); 2268 /* 2269 * If a link switch was scheduled before the restart, and ran 2270 * before reconfig, it will do nothing, so re-schedule. 2271 */ 2272 if (sdata->desired_active_links) 2273 wiphy_work_queue(sdata->local->hw.wiphy, 2274 &sdata->activate_links_work); 2275 } 2276 2277 /* Reconfigure sched scan if it was interrupted by FW restart */ 2278 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata, 2279 lockdep_is_held(&local->hw.wiphy->mtx)); 2280 sched_scan_req = rcu_dereference_protected(local->sched_scan_req, 2281 lockdep_is_held(&local->hw.wiphy->mtx)); 2282 if (sched_scan_sdata && sched_scan_req) 2283 /* 2284 * Sched scan stopped, but we don't want to report it. Instead, 2285 * we're trying to reschedule. However, if more than one scan 2286 * plan was set, we cannot reschedule since we don't know which 2287 * scan plan was currently running (and some scan plans may have 2288 * already finished). 2289 */ 2290 if (sched_scan_req->n_scan_plans > 1 || 2291 __ieee80211_request_sched_scan_start(sched_scan_sdata, 2292 sched_scan_req)) { 2293 RCU_INIT_POINTER(local->sched_scan_sdata, NULL); 2294 RCU_INIT_POINTER(local->sched_scan_req, NULL); 2295 sched_scan_stopped = true; 2296 } 2297 2298 if (sched_scan_stopped) 2299 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0); 2300 2301 wake_up: 2302 /* 2303 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation 2304 * sessions can be established after a resume. 2305 * 2306 * Also tear down aggregation sessions since reconfiguring 2307 * them in a hardware restart scenario is not easily done 2308 * right now, and the hardware will have lost information 2309 * about the sessions, but we and the AP still think they 2310 * are active. This is really a workaround though. 2311 */ 2312 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) { 2313 list_for_each_entry(sta, &local->sta_list, list) { 2314 if (!local->resuming) 2315 ieee80211_sta_tear_down_BA_sessions( 2316 sta, AGG_STOP_LOCAL_REQUEST); 2317 clear_sta_flag(sta, WLAN_STA_BLOCK_BA); 2318 } 2319 } 2320 2321 /* 2322 * If this is for hw restart things are still running. 2323 * We may want to change that later, however. 2324 */ 2325 if (local->open_count && (!suspended || reconfig_due_to_wowlan)) 2326 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART); 2327 2328 if (local->in_reconfig) { 2329 in_reconfig = local->in_reconfig; 2330 local->in_reconfig = false; 2331 barrier(); 2332 2333 ieee80211_reconfig_roc(local); 2334 2335 /* Requeue all works */ 2336 list_for_each_entry(sdata, &local->interfaces, list) { 2337 if (ieee80211_sdata_running(sdata)) 2338 wiphy_work_queue(local->hw.wiphy, &sdata->work); 2339 } 2340 } 2341 2342 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 2343 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 2344 false); 2345 2346 if (in_reconfig) { 2347 list_for_each_entry(sdata, &local->interfaces, list) { 2348 if (!ieee80211_sdata_running(sdata)) 2349 continue; 2350 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2351 ieee80211_sta_restart(sdata); 2352 } 2353 } 2354 2355 /* Passing NULL means an interface is picked for configuration */ 2356 if (local->virt_monitors > 0 && 2357 local->virt_monitors == local->open_count) 2358 ieee80211_add_virtual_monitor(local, NULL); 2359 2360 if (!suspended) 2361 return 0; 2362 2363 #ifdef CONFIG_PM 2364 /* first set suspended false, then resuming */ 2365 local->suspended = false; 2366 mb(); 2367 local->resuming = false; 2368 2369 ieee80211_flush_completed_scan(local, false); 2370 2371 if (local->open_count && !reconfig_due_to_wowlan) 2372 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND); 2373 2374 list_for_each_entry(sdata, &local->interfaces, list) { 2375 if (!ieee80211_sdata_running(sdata)) 2376 continue; 2377 if (sdata->vif.type == NL80211_IFTYPE_STATION) 2378 ieee80211_sta_restart(sdata); 2379 } 2380 2381 mod_timer(&local->sta_cleanup, jiffies + 1); 2382 #else 2383 WARN_ON(1); 2384 #endif 2385 2386 return 0; 2387 } 2388 2389 static void ieee80211_reconfig_disconnect(struct ieee80211_vif *vif, u8 flag) 2390 { 2391 struct ieee80211_sub_if_data *sdata; 2392 struct ieee80211_local *local; 2393 struct ieee80211_key *key; 2394 2395 if (WARN_ON(!vif)) 2396 return; 2397 2398 sdata = vif_to_sdata(vif); 2399 local = sdata->local; 2400 2401 lockdep_assert_wiphy(local->hw.wiphy); 2402 2403 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_RESUME && 2404 !local->resuming)) 2405 return; 2406 2407 if (WARN_ON(flag & IEEE80211_SDATA_DISCONNECT_HW_RESTART && 2408 !local->in_reconfig)) 2409 return; 2410 2411 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) 2412 return; 2413 2414 sdata->flags |= flag; 2415 2416 list_for_each_entry(key, &sdata->key_list, list) 2417 key->flags |= KEY_FLAG_TAINTED; 2418 } 2419 2420 void ieee80211_hw_restart_disconnect(struct ieee80211_vif *vif) 2421 { 2422 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_HW_RESTART); 2423 } 2424 EXPORT_SYMBOL_GPL(ieee80211_hw_restart_disconnect); 2425 2426 void ieee80211_resume_disconnect(struct ieee80211_vif *vif) 2427 { 2428 ieee80211_reconfig_disconnect(vif, IEEE80211_SDATA_DISCONNECT_RESUME); 2429 } 2430 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect); 2431 2432 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata, 2433 struct ieee80211_link_data *link) 2434 { 2435 struct ieee80211_local *local = sdata->local; 2436 struct ieee80211_chanctx_conf *chanctx_conf; 2437 struct ieee80211_chanctx *chanctx; 2438 2439 lockdep_assert_wiphy(local->hw.wiphy); 2440 2441 chanctx_conf = rcu_dereference_protected(link->conf->chanctx_conf, 2442 lockdep_is_held(&local->hw.wiphy->mtx)); 2443 2444 /* 2445 * This function can be called from a work, thus it may be possible 2446 * that the chanctx_conf is removed (due to a disconnection, for 2447 * example). 2448 * So nothing should be done in such case. 2449 */ 2450 if (!chanctx_conf) 2451 return; 2452 2453 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf); 2454 ieee80211_recalc_smps_chanctx(local, chanctx); 2455 } 2456 2457 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata, 2458 int link_id) 2459 { 2460 struct ieee80211_local *local = sdata->local; 2461 struct ieee80211_chanctx_conf *chanctx_conf; 2462 struct ieee80211_chanctx *chanctx; 2463 int i; 2464 2465 lockdep_assert_wiphy(local->hw.wiphy); 2466 2467 for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { 2468 struct ieee80211_bss_conf *bss_conf; 2469 2470 if (link_id >= 0 && link_id != i) 2471 continue; 2472 2473 rcu_read_lock(); 2474 bss_conf = rcu_dereference(sdata->vif.link_conf[i]); 2475 if (!bss_conf) { 2476 rcu_read_unlock(); 2477 continue; 2478 } 2479 2480 chanctx_conf = rcu_dereference_protected(bss_conf->chanctx_conf, 2481 lockdep_is_held(&local->hw.wiphy->mtx)); 2482 /* 2483 * Since we hold the wiphy mutex (checked above) 2484 * we can take the chanctx_conf pointer out of the 2485 * RCU critical section, it cannot go away without 2486 * the mutex. Just the way we reached it could - in 2487 * theory - go away, but we don't really care and 2488 * it really shouldn't happen anyway. 2489 */ 2490 rcu_read_unlock(); 2491 2492 if (!chanctx_conf) 2493 return; 2494 2495 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, 2496 conf); 2497 ieee80211_recalc_chanctx_min_def(local, chanctx); 2498 } 2499 } 2500 2501 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset) 2502 { 2503 size_t pos = offset; 2504 2505 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC) 2506 pos += 2 + ies[pos + 1]; 2507 2508 return pos; 2509 } 2510 2511 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2512 u16 cap) 2513 { 2514 __le16 tmp; 2515 2516 *pos++ = WLAN_EID_HT_CAPABILITY; 2517 *pos++ = sizeof(struct ieee80211_ht_cap); 2518 memset(pos, 0, sizeof(struct ieee80211_ht_cap)); 2519 2520 /* capability flags */ 2521 tmp = cpu_to_le16(cap); 2522 memcpy(pos, &tmp, sizeof(u16)); 2523 pos += sizeof(u16); 2524 2525 /* AMPDU parameters */ 2526 *pos++ = ht_cap->ampdu_factor | 2527 (ht_cap->ampdu_density << 2528 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT); 2529 2530 /* MCS set */ 2531 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs)); 2532 pos += sizeof(ht_cap->mcs); 2533 2534 /* extended capabilities */ 2535 pos += sizeof(__le16); 2536 2537 /* BF capabilities */ 2538 pos += sizeof(__le32); 2539 2540 /* antenna selection */ 2541 pos += sizeof(u8); 2542 2543 return pos; 2544 } 2545 2546 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2547 u32 cap) 2548 { 2549 __le32 tmp; 2550 2551 *pos++ = WLAN_EID_VHT_CAPABILITY; 2552 *pos++ = sizeof(struct ieee80211_vht_cap); 2553 memset(pos, 0, sizeof(struct ieee80211_vht_cap)); 2554 2555 /* capability flags */ 2556 tmp = cpu_to_le32(cap); 2557 memcpy(pos, &tmp, sizeof(u32)); 2558 pos += sizeof(u32); 2559 2560 /* VHT MCS set */ 2561 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs)); 2562 pos += sizeof(vht_cap->vht_mcs); 2563 2564 return pos; 2565 } 2566 2567 /* this may return more than ieee80211_put_he_6ghz_cap() will need */ 2568 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata) 2569 { 2570 const struct ieee80211_sta_he_cap *he_cap; 2571 struct ieee80211_supported_band *sband; 2572 u8 n; 2573 2574 sband = ieee80211_get_sband(sdata); 2575 if (!sband) 2576 return 0; 2577 2578 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2579 if (!he_cap) 2580 return 0; 2581 2582 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem); 2583 return 2 + 1 + 2584 sizeof(he_cap->he_cap_elem) + n + 2585 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2586 he_cap->he_cap_elem.phy_cap_info); 2587 } 2588 2589 static void 2590 ieee80211_get_adjusted_he_cap(const struct ieee80211_conn_settings *conn, 2591 const struct ieee80211_sta_he_cap *he_cap, 2592 struct ieee80211_he_cap_elem *elem) 2593 { 2594 u8 ru_limit, max_ru; 2595 2596 *elem = he_cap->he_cap_elem; 2597 2598 switch (conn->bw_limit) { 2599 case IEEE80211_CONN_BW_LIMIT_20: 2600 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_242; 2601 break; 2602 case IEEE80211_CONN_BW_LIMIT_40: 2603 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_484; 2604 break; 2605 case IEEE80211_CONN_BW_LIMIT_80: 2606 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_996; 2607 break; 2608 default: 2609 ru_limit = IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_2x996; 2610 break; 2611 } 2612 2613 max_ru = elem->phy_cap_info[8] & IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2614 max_ru = min(max_ru, ru_limit); 2615 elem->phy_cap_info[8] &= ~IEEE80211_HE_PHY_CAP8_DCM_MAX_RU_MASK; 2616 elem->phy_cap_info[8] |= max_ru; 2617 2618 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_40) { 2619 elem->phy_cap_info[0] &= 2620 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G | 2621 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G); 2622 elem->phy_cap_info[9] &= 2623 ~IEEE80211_HE_PHY_CAP9_LONGER_THAN_16_SIGB_OFDM_SYM; 2624 } 2625 2626 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 2627 elem->phy_cap_info[0] &= 2628 ~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 2629 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G); 2630 elem->phy_cap_info[5] &= 2631 ~IEEE80211_HE_PHY_CAP5_BEAMFORMEE_NUM_SND_DIM_ABOVE_80MHZ_MASK; 2632 elem->phy_cap_info[7] &= 2633 ~(IEEE80211_HE_PHY_CAP7_STBC_TX_ABOVE_80MHZ | 2634 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ); 2635 } 2636 } 2637 2638 int ieee80211_put_he_cap(struct sk_buff *skb, 2639 struct ieee80211_sub_if_data *sdata, 2640 const struct ieee80211_supported_band *sband, 2641 const struct ieee80211_conn_settings *conn) 2642 { 2643 const struct ieee80211_sta_he_cap *he_cap; 2644 struct ieee80211_he_cap_elem elem; 2645 u8 *len; 2646 u8 n; 2647 u8 ie_len; 2648 2649 if (!conn) 2650 conn = &ieee80211_conn_settings_unlimited; 2651 2652 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 2653 if (!he_cap) 2654 return 0; 2655 2656 /* modify on stack first to calculate 'n' and 'ie_len' correctly */ 2657 ieee80211_get_adjusted_he_cap(conn, he_cap, &elem); 2658 2659 n = ieee80211_he_mcs_nss_size(&elem); 2660 ie_len = 2 + 1 + 2661 sizeof(he_cap->he_cap_elem) + n + 2662 ieee80211_he_ppe_size(he_cap->ppe_thres[0], 2663 he_cap->he_cap_elem.phy_cap_info); 2664 2665 if (skb_tailroom(skb) < ie_len) 2666 return -ENOBUFS; 2667 2668 skb_put_u8(skb, WLAN_EID_EXTENSION); 2669 len = skb_put(skb, 1); /* We'll set the size later below */ 2670 skb_put_u8(skb, WLAN_EID_EXT_HE_CAPABILITY); 2671 2672 /* Fixed data */ 2673 skb_put_data(skb, &elem, sizeof(elem)); 2674 2675 skb_put_data(skb, &he_cap->he_mcs_nss_supp, n); 2676 2677 /* Check if PPE Threshold should be present */ 2678 if ((he_cap->he_cap_elem.phy_cap_info[6] & 2679 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0) 2680 goto end; 2681 2682 /* 2683 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm: 2684 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK) 2685 */ 2686 n = hweight8(he_cap->ppe_thres[0] & 2687 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK); 2688 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >> 2689 IEEE80211_PPE_THRES_NSS_POS)); 2690 2691 /* 2692 * Each pair is 6 bits, and we need to add the 7 "header" bits to the 2693 * total size. 2694 */ 2695 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7; 2696 n = DIV_ROUND_UP(n, 8); 2697 2698 /* Copy PPE Thresholds */ 2699 skb_put_data(skb, &he_cap->ppe_thres, n); 2700 2701 end: 2702 *len = skb_tail_pointer(skb) - len - 1; 2703 return 0; 2704 } 2705 2706 int ieee80211_put_reg_conn(struct sk_buff *skb, 2707 enum ieee80211_channel_flags flags) 2708 { 2709 u8 reg_conn = IEEE80211_REG_CONN_LPI_VALID | 2710 IEEE80211_REG_CONN_LPI_VALUE | 2711 IEEE80211_REG_CONN_SP_VALID; 2712 2713 if (!(flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT)) 2714 reg_conn |= IEEE80211_REG_CONN_SP_VALUE; 2715 2716 skb_put_u8(skb, WLAN_EID_EXTENSION); 2717 skb_put_u8(skb, 1 + sizeof(reg_conn)); 2718 skb_put_u8(skb, WLAN_EID_EXT_NON_AP_STA_REG_CON); 2719 skb_put_u8(skb, reg_conn); 2720 return 0; 2721 } 2722 2723 int ieee80211_put_he_6ghz_cap(struct sk_buff *skb, 2724 struct ieee80211_sub_if_data *sdata, 2725 enum ieee80211_smps_mode smps_mode) 2726 { 2727 struct ieee80211_supported_band *sband; 2728 const struct ieee80211_sband_iftype_data *iftd; 2729 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2730 __le16 cap; 2731 2732 if (!cfg80211_any_usable_channels(sdata->local->hw.wiphy, 2733 BIT(NL80211_BAND_6GHZ), 2734 IEEE80211_CHAN_NO_HE)) 2735 return 0; 2736 2737 sband = sdata->local->hw.wiphy->bands[NL80211_BAND_6GHZ]; 2738 2739 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2740 if (!iftd) 2741 return 0; 2742 2743 /* Check for device HE 6 GHz capability before adding element */ 2744 if (!iftd->he_6ghz_capa.capa) 2745 return 0; 2746 2747 cap = iftd->he_6ghz_capa.capa; 2748 cap &= cpu_to_le16(~IEEE80211_HE_6GHZ_CAP_SM_PS); 2749 2750 switch (smps_mode) { 2751 case IEEE80211_SMPS_AUTOMATIC: 2752 case IEEE80211_SMPS_NUM_MODES: 2753 WARN_ON(1); 2754 fallthrough; 2755 case IEEE80211_SMPS_OFF: 2756 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED, 2757 IEEE80211_HE_6GHZ_CAP_SM_PS); 2758 break; 2759 case IEEE80211_SMPS_STATIC: 2760 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC, 2761 IEEE80211_HE_6GHZ_CAP_SM_PS); 2762 break; 2763 case IEEE80211_SMPS_DYNAMIC: 2764 cap |= le16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC, 2765 IEEE80211_HE_6GHZ_CAP_SM_PS); 2766 break; 2767 } 2768 2769 if (skb_tailroom(skb) < 2 + 1 + sizeof(cap)) 2770 return -ENOBUFS; 2771 2772 skb_put_u8(skb, WLAN_EID_EXTENSION); 2773 skb_put_u8(skb, 1 + sizeof(cap)); 2774 skb_put_u8(skb, WLAN_EID_EXT_HE_6GHZ_CAPA); 2775 skb_put_data(skb, &cap, sizeof(cap)); 2776 return 0; 2777 } 2778 2779 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap, 2780 const struct cfg80211_chan_def *chandef, 2781 u16 prot_mode, bool rifs_mode) 2782 { 2783 struct ieee80211_ht_operation *ht_oper; 2784 /* Build HT Information */ 2785 *pos++ = WLAN_EID_HT_OPERATION; 2786 *pos++ = sizeof(struct ieee80211_ht_operation); 2787 ht_oper = (struct ieee80211_ht_operation *)pos; 2788 ht_oper->primary_chan = ieee80211_frequency_to_channel( 2789 chandef->chan->center_freq); 2790 switch (chandef->width) { 2791 case NL80211_CHAN_WIDTH_160: 2792 case NL80211_CHAN_WIDTH_80P80: 2793 case NL80211_CHAN_WIDTH_80: 2794 case NL80211_CHAN_WIDTH_40: 2795 if (chandef->center_freq1 > chandef->chan->center_freq) 2796 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 2797 else 2798 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 2799 break; 2800 case NL80211_CHAN_WIDTH_320: 2801 /* HT information element should not be included on 6GHz */ 2802 WARN_ON(1); 2803 return pos; 2804 default: 2805 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE; 2806 break; 2807 } 2808 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 2809 chandef->width != NL80211_CHAN_WIDTH_20_NOHT && 2810 chandef->width != NL80211_CHAN_WIDTH_20) 2811 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY; 2812 2813 if (rifs_mode) 2814 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE; 2815 2816 ht_oper->operation_mode = cpu_to_le16(prot_mode); 2817 ht_oper->stbc_param = 0x0000; 2818 2819 /* It seems that Basic MCS set and Supported MCS set 2820 are identical for the first 10 bytes */ 2821 memset(&ht_oper->basic_set, 0, 16); 2822 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10); 2823 2824 return pos + sizeof(struct ieee80211_ht_operation); 2825 } 2826 2827 void ieee80211_ie_build_wide_bw_cs(u8 *pos, 2828 const struct cfg80211_chan_def *chandef) 2829 { 2830 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */ 2831 *pos++ = 3; /* IE length */ 2832 /* New channel width */ 2833 switch (chandef->width) { 2834 case NL80211_CHAN_WIDTH_80: 2835 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ; 2836 break; 2837 case NL80211_CHAN_WIDTH_160: 2838 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ; 2839 break; 2840 case NL80211_CHAN_WIDTH_80P80: 2841 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ; 2842 break; 2843 case NL80211_CHAN_WIDTH_320: 2844 /* The behavior is not defined for 320 MHz channels */ 2845 WARN_ON(1); 2846 fallthrough; 2847 default: 2848 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT; 2849 } 2850 2851 /* new center frequency segment 0 */ 2852 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1); 2853 /* new center frequency segment 1 */ 2854 if (chandef->center_freq2) 2855 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2); 2856 else 2857 *pos++ = 0; 2858 } 2859 2860 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap, 2861 const struct cfg80211_chan_def *chandef) 2862 { 2863 struct ieee80211_vht_operation *vht_oper; 2864 2865 *pos++ = WLAN_EID_VHT_OPERATION; 2866 *pos++ = sizeof(struct ieee80211_vht_operation); 2867 vht_oper = (struct ieee80211_vht_operation *)pos; 2868 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel( 2869 chandef->center_freq1); 2870 if (chandef->center_freq2) 2871 vht_oper->center_freq_seg1_idx = 2872 ieee80211_frequency_to_channel(chandef->center_freq2); 2873 else 2874 vht_oper->center_freq_seg1_idx = 0x00; 2875 2876 switch (chandef->width) { 2877 case NL80211_CHAN_WIDTH_160: 2878 /* 2879 * Convert 160 MHz channel width to new style as interop 2880 * workaround. 2881 */ 2882 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2883 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx; 2884 if (chandef->chan->center_freq < chandef->center_freq1) 2885 vht_oper->center_freq_seg0_idx -= 8; 2886 else 2887 vht_oper->center_freq_seg0_idx += 8; 2888 break; 2889 case NL80211_CHAN_WIDTH_80P80: 2890 /* 2891 * Convert 80+80 MHz channel width to new style as interop 2892 * workaround. 2893 */ 2894 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2895 break; 2896 case NL80211_CHAN_WIDTH_80: 2897 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ; 2898 break; 2899 case NL80211_CHAN_WIDTH_320: 2900 /* VHT information element should not be included on 6GHz */ 2901 WARN_ON(1); 2902 return pos; 2903 default: 2904 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT; 2905 break; 2906 } 2907 2908 /* don't require special VHT peer rates */ 2909 vht_oper->basic_mcs_set = cpu_to_le16(0xffff); 2910 2911 return pos + sizeof(struct ieee80211_vht_operation); 2912 } 2913 2914 u8 *ieee80211_ie_build_he_oper(u8 *pos, const struct cfg80211_chan_def *chandef) 2915 { 2916 struct ieee80211_he_operation *he_oper; 2917 struct ieee80211_he_6ghz_oper *he_6ghz_op; 2918 struct cfg80211_chan_def he_chandef; 2919 u32 he_oper_params; 2920 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation); 2921 2922 if (chandef->chan->band == NL80211_BAND_6GHZ) 2923 ie_len += sizeof(struct ieee80211_he_6ghz_oper); 2924 2925 *pos++ = WLAN_EID_EXTENSION; 2926 *pos++ = ie_len; 2927 *pos++ = WLAN_EID_EXT_HE_OPERATION; 2928 2929 he_oper_params = 0; 2930 he_oper_params |= u32_encode_bits(1023, /* disabled */ 2931 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 2932 he_oper_params |= u32_encode_bits(1, 2933 IEEE80211_HE_OPERATION_ER_SU_DISABLE); 2934 he_oper_params |= u32_encode_bits(1, 2935 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 2936 if (chandef->chan->band == NL80211_BAND_6GHZ) 2937 he_oper_params |= u32_encode_bits(1, 2938 IEEE80211_HE_OPERATION_6GHZ_OP_INFO); 2939 2940 he_oper = (struct ieee80211_he_operation *)pos; 2941 he_oper->he_oper_params = cpu_to_le32(he_oper_params); 2942 2943 /* don't require special HE peer rates */ 2944 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff); 2945 pos += sizeof(struct ieee80211_he_operation); 2946 2947 if (chandef->chan->band != NL80211_BAND_6GHZ) 2948 goto out; 2949 2950 cfg80211_chandef_create(&he_chandef, chandef->chan, NL80211_CHAN_NO_HT); 2951 he_chandef.center_freq1 = chandef->center_freq1; 2952 he_chandef.center_freq2 = chandef->center_freq2; 2953 he_chandef.width = chandef->width; 2954 2955 /* TODO add VHT operational */ 2956 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos; 2957 he_6ghz_op->minrate = 6; /* 6 Mbps */ 2958 he_6ghz_op->primary = 2959 ieee80211_frequency_to_channel(he_chandef.chan->center_freq); 2960 he_6ghz_op->ccfs0 = 2961 ieee80211_frequency_to_channel(he_chandef.center_freq1); 2962 if (he_chandef.center_freq2) 2963 he_6ghz_op->ccfs1 = 2964 ieee80211_frequency_to_channel(he_chandef.center_freq2); 2965 else 2966 he_6ghz_op->ccfs1 = 0; 2967 2968 switch (he_chandef.width) { 2969 case NL80211_CHAN_WIDTH_320: 2970 /* Downgrade EHT 320 MHz BW to 160 MHz for HE and set new 2971 * center_freq1 2972 */ 2973 ieee80211_chandef_downgrade(&he_chandef, NULL); 2974 he_6ghz_op->ccfs0 = 2975 ieee80211_frequency_to_channel(he_chandef.center_freq1); 2976 fallthrough; 2977 case NL80211_CHAN_WIDTH_160: 2978 /* Convert 160 MHz channel width to new style as interop 2979 * workaround. 2980 */ 2981 he_6ghz_op->control = 2982 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 2983 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0; 2984 if (he_chandef.chan->center_freq < he_chandef.center_freq1) 2985 he_6ghz_op->ccfs0 -= 8; 2986 else 2987 he_6ghz_op->ccfs0 += 8; 2988 fallthrough; 2989 case NL80211_CHAN_WIDTH_80P80: 2990 he_6ghz_op->control = 2991 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ; 2992 break; 2993 case NL80211_CHAN_WIDTH_80: 2994 he_6ghz_op->control = 2995 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ; 2996 break; 2997 case NL80211_CHAN_WIDTH_40: 2998 he_6ghz_op->control = 2999 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ; 3000 break; 3001 default: 3002 he_6ghz_op->control = 3003 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ; 3004 break; 3005 } 3006 3007 pos += sizeof(struct ieee80211_he_6ghz_oper); 3008 3009 out: 3010 return pos; 3011 } 3012 3013 u8 *ieee80211_ie_build_eht_oper(u8 *pos, const struct cfg80211_chan_def *chandef, 3014 const struct ieee80211_sta_eht_cap *eht_cap) 3015 3016 { 3017 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *eht_mcs_nss = 3018 &eht_cap->eht_mcs_nss_supp.only_20mhz; 3019 struct ieee80211_eht_operation *eht_oper; 3020 struct ieee80211_eht_operation_info *eht_oper_info; 3021 u8 eht_oper_len = offsetof(struct ieee80211_eht_operation, optional); 3022 u8 eht_oper_info_len = 3023 offsetof(struct ieee80211_eht_operation_info, optional); 3024 u8 chan_width = 0; 3025 3026 *pos++ = WLAN_EID_EXTENSION; 3027 *pos++ = 1 + eht_oper_len + eht_oper_info_len; 3028 *pos++ = WLAN_EID_EXT_EHT_OPERATION; 3029 3030 eht_oper = (struct ieee80211_eht_operation *)pos; 3031 3032 memcpy(&eht_oper->basic_mcs_nss, eht_mcs_nss, sizeof(*eht_mcs_nss)); 3033 eht_oper->params |= IEEE80211_EHT_OPER_INFO_PRESENT; 3034 pos += eht_oper_len; 3035 3036 eht_oper_info = 3037 (struct ieee80211_eht_operation_info *)eht_oper->optional; 3038 3039 eht_oper_info->ccfs0 = 3040 ieee80211_frequency_to_channel(chandef->center_freq1); 3041 if (chandef->center_freq2) 3042 eht_oper_info->ccfs1 = 3043 ieee80211_frequency_to_channel(chandef->center_freq2); 3044 else 3045 eht_oper_info->ccfs1 = 0; 3046 3047 switch (chandef->width) { 3048 case NL80211_CHAN_WIDTH_320: 3049 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ; 3050 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3051 if (chandef->chan->center_freq < chandef->center_freq1) 3052 eht_oper_info->ccfs0 -= 16; 3053 else 3054 eht_oper_info->ccfs0 += 16; 3055 break; 3056 case NL80211_CHAN_WIDTH_160: 3057 eht_oper_info->ccfs1 = eht_oper_info->ccfs0; 3058 if (chandef->chan->center_freq < chandef->center_freq1) 3059 eht_oper_info->ccfs0 -= 8; 3060 else 3061 eht_oper_info->ccfs0 += 8; 3062 fallthrough; 3063 case NL80211_CHAN_WIDTH_80P80: 3064 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ; 3065 break; 3066 case NL80211_CHAN_WIDTH_80: 3067 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ; 3068 break; 3069 case NL80211_CHAN_WIDTH_40: 3070 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ; 3071 break; 3072 default: 3073 chan_width = IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ; 3074 break; 3075 } 3076 eht_oper_info->control = chan_width; 3077 pos += eht_oper_info_len; 3078 3079 /* TODO: eht_oper_info->optional */ 3080 3081 return pos; 3082 } 3083 3084 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper, 3085 struct cfg80211_chan_def *chandef) 3086 { 3087 enum nl80211_channel_type channel_type; 3088 3089 if (!ht_oper) 3090 return false; 3091 3092 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 3093 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 3094 channel_type = NL80211_CHAN_HT20; 3095 break; 3096 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 3097 channel_type = NL80211_CHAN_HT40PLUS; 3098 break; 3099 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 3100 channel_type = NL80211_CHAN_HT40MINUS; 3101 break; 3102 default: 3103 return false; 3104 } 3105 3106 cfg80211_chandef_create(chandef, chandef->chan, channel_type); 3107 return true; 3108 } 3109 3110 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info, 3111 const struct ieee80211_vht_operation *oper, 3112 const struct ieee80211_ht_operation *htop, 3113 struct cfg80211_chan_def *chandef) 3114 { 3115 struct cfg80211_chan_def new = *chandef; 3116 int cf0, cf1; 3117 int ccfs0, ccfs1, ccfs2; 3118 int ccf0, ccf1; 3119 u32 vht_cap; 3120 bool support_80_80 = false; 3121 bool support_160 = false; 3122 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info, 3123 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); 3124 u8 supp_chwidth = u32_get_bits(vht_cap_info, 3125 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK); 3126 3127 if (!oper || !htop) 3128 return false; 3129 3130 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap; 3131 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK | 3132 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)); 3133 support_80_80 = ((vht_cap & 3134 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) || 3135 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ && 3136 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) || 3137 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >> 3138 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1)); 3139 ccfs0 = oper->center_freq_seg0_idx; 3140 ccfs1 = oper->center_freq_seg1_idx; 3141 ccfs2 = (le16_to_cpu(htop->operation_mode) & 3142 IEEE80211_HT_OP_MODE_CCFS2_MASK) 3143 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT; 3144 3145 ccf0 = ccfs0; 3146 3147 /* if not supported, parse as though we didn't understand it */ 3148 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW)) 3149 ext_nss_bw_supp = 0; 3150 3151 /* 3152 * Cf. IEEE 802.11 Table 9-250 3153 * 3154 * We really just consider that because it's inefficient to connect 3155 * at a higher bandwidth than we'll actually be able to use. 3156 */ 3157 switch ((supp_chwidth << 4) | ext_nss_bw_supp) { 3158 default: 3159 case 0x00: 3160 ccf1 = 0; 3161 support_160 = false; 3162 support_80_80 = false; 3163 break; 3164 case 0x01: 3165 support_80_80 = false; 3166 fallthrough; 3167 case 0x02: 3168 case 0x03: 3169 ccf1 = ccfs2; 3170 break; 3171 case 0x10: 3172 ccf1 = ccfs1; 3173 break; 3174 case 0x11: 3175 case 0x12: 3176 if (!ccfs1) 3177 ccf1 = ccfs2; 3178 else 3179 ccf1 = ccfs1; 3180 break; 3181 case 0x13: 3182 case 0x20: 3183 case 0x23: 3184 ccf1 = ccfs1; 3185 break; 3186 } 3187 3188 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band); 3189 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band); 3190 3191 switch (oper->chan_width) { 3192 case IEEE80211_VHT_CHANWIDTH_USE_HT: 3193 /* just use HT information directly */ 3194 break; 3195 case IEEE80211_VHT_CHANWIDTH_80MHZ: 3196 new.width = NL80211_CHAN_WIDTH_80; 3197 new.center_freq1 = cf0; 3198 /* If needed, adjust based on the newer interop workaround. */ 3199 if (ccf1) { 3200 unsigned int diff; 3201 3202 diff = abs(ccf1 - ccf0); 3203 if ((diff == 8) && support_160) { 3204 new.width = NL80211_CHAN_WIDTH_160; 3205 new.center_freq1 = cf1; 3206 } else if ((diff > 8) && support_80_80) { 3207 new.width = NL80211_CHAN_WIDTH_80P80; 3208 new.center_freq2 = cf1; 3209 } 3210 } 3211 break; 3212 case IEEE80211_VHT_CHANWIDTH_160MHZ: 3213 /* deprecated encoding */ 3214 new.width = NL80211_CHAN_WIDTH_160; 3215 new.center_freq1 = cf0; 3216 break; 3217 case IEEE80211_VHT_CHANWIDTH_80P80MHZ: 3218 /* deprecated encoding */ 3219 new.width = NL80211_CHAN_WIDTH_80P80; 3220 new.center_freq1 = cf0; 3221 new.center_freq2 = cf1; 3222 break; 3223 default: 3224 return false; 3225 } 3226 3227 if (!cfg80211_chandef_valid(&new)) 3228 return false; 3229 3230 *chandef = new; 3231 return true; 3232 } 3233 3234 void ieee80211_chandef_eht_oper(const struct ieee80211_eht_operation_info *info, 3235 struct cfg80211_chan_def *chandef) 3236 { 3237 chandef->center_freq1 = 3238 ieee80211_channel_to_frequency(info->ccfs0, 3239 chandef->chan->band); 3240 3241 switch (u8_get_bits(info->control, 3242 IEEE80211_EHT_OPER_CHAN_WIDTH)) { 3243 case IEEE80211_EHT_OPER_CHAN_WIDTH_20MHZ: 3244 chandef->width = NL80211_CHAN_WIDTH_20; 3245 break; 3246 case IEEE80211_EHT_OPER_CHAN_WIDTH_40MHZ: 3247 chandef->width = NL80211_CHAN_WIDTH_40; 3248 break; 3249 case IEEE80211_EHT_OPER_CHAN_WIDTH_80MHZ: 3250 chandef->width = NL80211_CHAN_WIDTH_80; 3251 break; 3252 case IEEE80211_EHT_OPER_CHAN_WIDTH_160MHZ: 3253 chandef->width = NL80211_CHAN_WIDTH_160; 3254 chandef->center_freq1 = 3255 ieee80211_channel_to_frequency(info->ccfs1, 3256 chandef->chan->band); 3257 break; 3258 case IEEE80211_EHT_OPER_CHAN_WIDTH_320MHZ: 3259 chandef->width = NL80211_CHAN_WIDTH_320; 3260 chandef->center_freq1 = 3261 ieee80211_channel_to_frequency(info->ccfs1, 3262 chandef->chan->band); 3263 break; 3264 } 3265 } 3266 3267 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_local *local, 3268 const struct ieee80211_he_operation *he_oper, 3269 const struct ieee80211_eht_operation *eht_oper, 3270 struct cfg80211_chan_def *chandef) 3271 { 3272 struct cfg80211_chan_def he_chandef = *chandef; 3273 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 3274 u32 freq; 3275 3276 if (chandef->chan->band != NL80211_BAND_6GHZ) 3277 return true; 3278 3279 if (!he_oper) 3280 return false; 3281 3282 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); 3283 if (!he_6ghz_oper) 3284 return false; 3285 3286 /* 3287 * The EHT operation IE does not contain the primary channel so the 3288 * primary channel frequency should be taken from the 6 GHz operation 3289 * information. 3290 */ 3291 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary, 3292 NL80211_BAND_6GHZ); 3293 he_chandef.chan = ieee80211_get_channel(local->hw.wiphy, freq); 3294 3295 if (!he_chandef.chan) 3296 return false; 3297 3298 if (!eht_oper || 3299 !(eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT)) { 3300 switch (u8_get_bits(he_6ghz_oper->control, 3301 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) { 3302 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ: 3303 he_chandef.width = NL80211_CHAN_WIDTH_20; 3304 break; 3305 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ: 3306 he_chandef.width = NL80211_CHAN_WIDTH_40; 3307 break; 3308 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ: 3309 he_chandef.width = NL80211_CHAN_WIDTH_80; 3310 break; 3311 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ: 3312 he_chandef.width = NL80211_CHAN_WIDTH_80; 3313 if (!he_6ghz_oper->ccfs1) 3314 break; 3315 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) 3316 he_chandef.width = NL80211_CHAN_WIDTH_160; 3317 else 3318 he_chandef.width = NL80211_CHAN_WIDTH_80P80; 3319 break; 3320 } 3321 3322 if (he_chandef.width == NL80211_CHAN_WIDTH_160) { 3323 he_chandef.center_freq1 = 3324 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3325 NL80211_BAND_6GHZ); 3326 } else { 3327 he_chandef.center_freq1 = 3328 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0, 3329 NL80211_BAND_6GHZ); 3330 he_chandef.center_freq2 = 3331 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1, 3332 NL80211_BAND_6GHZ); 3333 } 3334 } else { 3335 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 3336 &he_chandef); 3337 he_chandef.punctured = 3338 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 3339 } 3340 3341 if (!cfg80211_chandef_valid(&he_chandef)) 3342 return false; 3343 3344 *chandef = he_chandef; 3345 3346 return true; 3347 } 3348 3349 bool ieee80211_chandef_s1g_oper(struct ieee80211_local *local, 3350 const struct ieee80211_s1g_oper_ie *oper, 3351 struct cfg80211_chan_def *chandef) 3352 { 3353 u32 oper_khz, pri_1mhz_khz, pri_2mhz_khz; 3354 3355 if (!oper) 3356 return false; 3357 3358 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) { 3359 case IEEE80211_S1G_CHANWIDTH_1MHZ: 3360 chandef->width = NL80211_CHAN_WIDTH_1; 3361 break; 3362 case IEEE80211_S1G_CHANWIDTH_2MHZ: 3363 chandef->width = NL80211_CHAN_WIDTH_2; 3364 break; 3365 case IEEE80211_S1G_CHANWIDTH_4MHZ: 3366 chandef->width = NL80211_CHAN_WIDTH_4; 3367 break; 3368 case IEEE80211_S1G_CHANWIDTH_8MHZ: 3369 chandef->width = NL80211_CHAN_WIDTH_8; 3370 break; 3371 case IEEE80211_S1G_CHANWIDTH_16MHZ: 3372 chandef->width = NL80211_CHAN_WIDTH_16; 3373 break; 3374 default: 3375 return false; 3376 } 3377 3378 chandef->s1g_primary_2mhz = false; 3379 3380 switch (u8_get_bits(oper->ch_width, S1G_OPER_CH_WIDTH_PRIMARY)) { 3381 case IEEE80211_S1G_PRI_CHANWIDTH_1MHZ: 3382 pri_1mhz_khz = ieee80211_channel_to_freq_khz( 3383 oper->primary_ch, NL80211_BAND_S1GHZ); 3384 break; 3385 case IEEE80211_S1G_PRI_CHANWIDTH_2MHZ: 3386 chandef->s1g_primary_2mhz = true; 3387 pri_2mhz_khz = ieee80211_channel_to_freq_khz( 3388 oper->primary_ch, NL80211_BAND_S1GHZ); 3389 3390 if (u8_get_bits(oper->ch_width, S1G_OPER_CH_PRIMARY_LOCATION) == 3391 S1G_2M_PRIMARY_LOCATION_LOWER) 3392 pri_1mhz_khz = pri_2mhz_khz - 500; 3393 else 3394 pri_1mhz_khz = pri_2mhz_khz + 500; 3395 break; 3396 default: 3397 return false; 3398 } 3399 3400 oper_khz = ieee80211_channel_to_freq_khz(oper->oper_ch, 3401 NL80211_BAND_S1GHZ); 3402 chandef->center_freq1 = KHZ_TO_MHZ(oper_khz); 3403 chandef->freq1_offset = oper_khz % 1000; 3404 chandef->chan = 3405 ieee80211_get_channel_khz(local->hw.wiphy, pri_1mhz_khz); 3406 3407 return chandef->chan; 3408 } 3409 3410 int ieee80211_put_srates_elem(struct sk_buff *skb, 3411 const struct ieee80211_supported_band *sband, 3412 u32 basic_rates, u32 masked_rates, 3413 u8 element_id) 3414 { 3415 u8 i, rates, skip; 3416 3417 rates = 0; 3418 for (i = 0; i < sband->n_bitrates; i++) { 3419 if (masked_rates & BIT(i)) 3420 continue; 3421 rates++; 3422 } 3423 3424 if (element_id == WLAN_EID_SUPP_RATES) { 3425 rates = min_t(u8, rates, 8); 3426 skip = 0; 3427 } else { 3428 skip = 8; 3429 if (rates <= skip) 3430 return 0; 3431 rates -= skip; 3432 } 3433 3434 if (skb_tailroom(skb) < rates + 2) 3435 return -ENOBUFS; 3436 3437 skb_put_u8(skb, element_id); 3438 skb_put_u8(skb, rates); 3439 3440 for (i = 0; i < sband->n_bitrates && rates; i++) { 3441 int rate; 3442 u8 basic; 3443 3444 if (masked_rates & BIT(i)) 3445 continue; 3446 3447 if (skip > 0) { 3448 skip--; 3449 continue; 3450 } 3451 3452 basic = basic_rates & BIT(i) ? 0x80 : 0; 3453 3454 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate, 5); 3455 skb_put_u8(skb, basic | (u8)rate); 3456 rates--; 3457 } 3458 3459 WARN(rates > 0, "rates confused: rates:%d, element:%d\n", 3460 rates, element_id); 3461 3462 return 0; 3463 } 3464 3465 int ieee80211_ave_rssi(struct ieee80211_vif *vif, int link_id) 3466 { 3467 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3468 struct ieee80211_link_data *link_data; 3469 3470 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) 3471 return 0; 3472 3473 if (link_id < 0) 3474 link_data = &sdata->deflink; 3475 else 3476 link_data = wiphy_dereference(sdata->local->hw.wiphy, 3477 sdata->link[link_id]); 3478 3479 if (WARN_ON_ONCE(!link_data)) 3480 return -99; 3481 3482 return -ewma_beacon_signal_read(&link_data->u.mgd.ave_beacon_signal); 3483 } 3484 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi); 3485 3486 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs) 3487 { 3488 if (!mcs) 3489 return 1; 3490 3491 /* TODO: consider rx_highest */ 3492 3493 if (mcs->rx_mask[3]) 3494 return 4; 3495 if (mcs->rx_mask[2]) 3496 return 3; 3497 if (mcs->rx_mask[1]) 3498 return 2; 3499 return 1; 3500 } 3501 3502 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_hw *hw, 3503 struct ieee80211_rx_status *status, 3504 unsigned int mpdu_len, 3505 unsigned int mpdu_offset) 3506 { 3507 u64 ts = status->mactime; 3508 bool mactime_plcp_start; 3509 struct rate_info ri; 3510 u16 rate; 3511 u8 n_ltf; 3512 3513 if (WARN_ON(!ieee80211_have_rx_timestamp(status))) 3514 return 0; 3515 3516 mactime_plcp_start = (status->flag & RX_FLAG_MACTIME) == 3517 RX_FLAG_MACTIME_PLCP_START; 3518 3519 memset(&ri, 0, sizeof(ri)); 3520 3521 ri.bw = status->bw; 3522 3523 /* Fill cfg80211 rate info */ 3524 switch (status->encoding) { 3525 case RX_ENC_EHT: 3526 ri.flags |= RATE_INFO_FLAGS_EHT_MCS; 3527 ri.mcs = status->rate_idx; 3528 ri.nss = status->nss; 3529 ri.eht_ru_alloc = status->eht.ru; 3530 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3531 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3532 /* TODO/FIXME: is this right? handle other PPDUs */ 3533 if (mactime_plcp_start) { 3534 mpdu_offset += 2; 3535 ts += 36; 3536 } 3537 break; 3538 case RX_ENC_HE: 3539 ri.flags |= RATE_INFO_FLAGS_HE_MCS; 3540 ri.mcs = status->rate_idx; 3541 ri.nss = status->nss; 3542 ri.he_ru_alloc = status->he_ru; 3543 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3544 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3545 3546 /* 3547 * See P802.11ax_D6.0, section 27.3.4 for 3548 * VHT PPDU format. 3549 */ 3550 if (mactime_plcp_start) { 3551 mpdu_offset += 2; 3552 ts += 36; 3553 3554 /* 3555 * TODO: 3556 * For HE MU PPDU, add the HE-SIG-B. 3557 * For HE ER PPDU, add 8us for the HE-SIG-A. 3558 * For HE TB PPDU, add 4us for the HE-STF. 3559 * Add the HE-LTF durations - variable. 3560 */ 3561 } 3562 3563 break; 3564 case RX_ENC_HT: 3565 ri.mcs = status->rate_idx; 3566 ri.flags |= RATE_INFO_FLAGS_MCS; 3567 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3568 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3569 3570 /* 3571 * See P802.11REVmd_D3.0, section 19.3.2 for 3572 * HT PPDU format. 3573 */ 3574 if (mactime_plcp_start) { 3575 mpdu_offset += 2; 3576 if (status->enc_flags & RX_ENC_FLAG_HT_GF) 3577 ts += 24; 3578 else 3579 ts += 32; 3580 3581 /* 3582 * Add Data HT-LTFs per streams 3583 * TODO: add Extension HT-LTFs, 4us per LTF 3584 */ 3585 n_ltf = ((ri.mcs >> 3) & 3) + 1; 3586 n_ltf = n_ltf == 3 ? 4 : n_ltf; 3587 ts += n_ltf * 4; 3588 } 3589 3590 break; 3591 case RX_ENC_VHT: 3592 ri.flags |= RATE_INFO_FLAGS_VHT_MCS; 3593 ri.mcs = status->rate_idx; 3594 ri.nss = status->nss; 3595 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI) 3596 ri.flags |= RATE_INFO_FLAGS_SHORT_GI; 3597 3598 /* 3599 * See P802.11REVmd_D3.0, section 21.3.2 for 3600 * VHT PPDU format. 3601 */ 3602 if (mactime_plcp_start) { 3603 mpdu_offset += 2; 3604 ts += 36; 3605 3606 /* 3607 * Add VHT-LTFs per streams 3608 */ 3609 n_ltf = (ri.nss != 1) && (ri.nss % 2) ? 3610 ri.nss + 1 : ri.nss; 3611 ts += 4 * n_ltf; 3612 } 3613 3614 break; 3615 default: 3616 WARN_ON(1); 3617 fallthrough; 3618 case RX_ENC_LEGACY: { 3619 struct ieee80211_supported_band *sband; 3620 3621 sband = hw->wiphy->bands[status->band]; 3622 ri.legacy = sband->bitrates[status->rate_idx].bitrate; 3623 3624 if (mactime_plcp_start) { 3625 if (status->band == NL80211_BAND_5GHZ) { 3626 ts += 20; 3627 mpdu_offset += 2; 3628 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) { 3629 ts += 96; 3630 } else { 3631 ts += 192; 3632 } 3633 } 3634 break; 3635 } 3636 } 3637 3638 rate = cfg80211_calculate_bitrate(&ri); 3639 if (WARN_ONCE(!rate, 3640 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n", 3641 (unsigned long long)status->flag, status->rate_idx, 3642 status->nss)) 3643 return 0; 3644 3645 /* rewind from end of MPDU */ 3646 if ((status->flag & RX_FLAG_MACTIME) == RX_FLAG_MACTIME_END) 3647 ts -= mpdu_len * 8 * 10 / rate; 3648 3649 ts += mpdu_offset * 8 * 10 / rate; 3650 3651 return ts; 3652 } 3653 EXPORT_SYMBOL_GPL(ieee80211_calculate_rx_timestamp); 3654 3655 /* Cancel CAC for the interfaces under the specified @local. If @ctx is 3656 * also provided, only the interfaces using that ctx will be canceled. 3657 */ 3658 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local, 3659 struct ieee80211_chanctx *ctx) 3660 { 3661 struct ieee80211_sub_if_data *sdata; 3662 struct cfg80211_chan_def chandef; 3663 struct ieee80211_link_data *link; 3664 struct ieee80211_chanctx_conf *chanctx_conf; 3665 unsigned int link_id; 3666 3667 lockdep_assert_wiphy(local->hw.wiphy); 3668 3669 list_for_each_entry(sdata, &local->interfaces, list) { 3670 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3671 link_id++) { 3672 link = sdata_dereference(sdata->link[link_id], 3673 sdata); 3674 if (!link) 3675 continue; 3676 3677 chanctx_conf = sdata_dereference(link->conf->chanctx_conf, 3678 sdata); 3679 if (ctx && &ctx->conf != chanctx_conf) 3680 continue; 3681 3682 wiphy_hrtimer_work_cancel(local->hw.wiphy, 3683 &link->dfs_cac_timer_work); 3684 3685 if (!sdata->wdev.links[link_id].cac_started) 3686 continue; 3687 3688 chandef = link->conf->chanreq.oper; 3689 ieee80211_link_release_channel(link); 3690 cfg80211_cac_event(sdata->dev, &chandef, 3691 NL80211_RADAR_CAC_ABORTED, 3692 GFP_KERNEL, link_id); 3693 } 3694 } 3695 } 3696 3697 void ieee80211_dfs_radar_detected_work(struct wiphy *wiphy, 3698 struct wiphy_work *work) 3699 { 3700 struct ieee80211_local *local = 3701 container_of(work, struct ieee80211_local, radar_detected_work); 3702 struct cfg80211_chan_def chandef; 3703 struct ieee80211_chanctx *ctx; 3704 3705 lockdep_assert_wiphy(local->hw.wiphy); 3706 3707 list_for_each_entry(ctx, &local->chanctx_list, list) { 3708 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3709 continue; 3710 3711 if (!ctx->radar_detected) 3712 continue; 3713 3714 ctx->radar_detected = false; 3715 3716 chandef = ctx->conf.def; 3717 3718 ieee80211_dfs_cac_cancel(local, ctx); 3719 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL); 3720 } 3721 } 3722 3723 static void 3724 ieee80211_radar_mark_chan_ctx_iterator(struct ieee80211_hw *hw, 3725 struct ieee80211_chanctx_conf *chanctx_conf, 3726 void *data) 3727 { 3728 struct ieee80211_chanctx *ctx = 3729 container_of(chanctx_conf, struct ieee80211_chanctx, 3730 conf); 3731 3732 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) 3733 return; 3734 3735 if (data && data != chanctx_conf) 3736 return; 3737 3738 ctx->radar_detected = true; 3739 } 3740 3741 void ieee80211_radar_detected(struct ieee80211_hw *hw, 3742 struct ieee80211_chanctx_conf *chanctx_conf) 3743 { 3744 struct ieee80211_local *local = hw_to_local(hw); 3745 3746 trace_api_radar_detected(local); 3747 3748 ieee80211_iter_chan_contexts_atomic(hw, ieee80211_radar_mark_chan_ctx_iterator, 3749 chanctx_conf); 3750 3751 wiphy_work_queue(hw->wiphy, &local->radar_detected_work); 3752 } 3753 EXPORT_SYMBOL(ieee80211_radar_detected); 3754 3755 void ieee80211_chandef_downgrade(struct cfg80211_chan_def *c, 3756 struct ieee80211_conn_settings *conn) 3757 { 3758 enum nl80211_chan_width new_primary_width; 3759 struct ieee80211_conn_settings _ignored = {}; 3760 3761 /* allow passing NULL if caller doesn't care */ 3762 if (!conn) 3763 conn = &_ignored; 3764 3765 again: 3766 /* no-HT indicates nothing to do */ 3767 new_primary_width = NL80211_CHAN_WIDTH_20_NOHT; 3768 3769 switch (c->width) { 3770 default: 3771 case NL80211_CHAN_WIDTH_20_NOHT: 3772 WARN_ON_ONCE(1); 3773 fallthrough; 3774 case NL80211_CHAN_WIDTH_20: 3775 c->width = NL80211_CHAN_WIDTH_20_NOHT; 3776 conn->mode = IEEE80211_CONN_MODE_LEGACY; 3777 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3778 c->punctured = 0; 3779 break; 3780 case NL80211_CHAN_WIDTH_40: 3781 c->width = NL80211_CHAN_WIDTH_20; 3782 c->center_freq1 = c->chan->center_freq; 3783 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3784 conn->mode = IEEE80211_CONN_MODE_HT; 3785 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3786 c->punctured = 0; 3787 break; 3788 case NL80211_CHAN_WIDTH_80: 3789 new_primary_width = NL80211_CHAN_WIDTH_40; 3790 if (conn->mode == IEEE80211_CONN_MODE_VHT) 3791 conn->mode = IEEE80211_CONN_MODE_HT; 3792 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_40; 3793 break; 3794 case NL80211_CHAN_WIDTH_80P80: 3795 c->center_freq2 = 0; 3796 c->width = NL80211_CHAN_WIDTH_80; 3797 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3798 break; 3799 case NL80211_CHAN_WIDTH_160: 3800 new_primary_width = NL80211_CHAN_WIDTH_80; 3801 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 3802 break; 3803 case NL80211_CHAN_WIDTH_320: 3804 new_primary_width = NL80211_CHAN_WIDTH_160; 3805 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 3806 break; 3807 case NL80211_CHAN_WIDTH_1: 3808 case NL80211_CHAN_WIDTH_2: 3809 case NL80211_CHAN_WIDTH_4: 3810 case NL80211_CHAN_WIDTH_8: 3811 case NL80211_CHAN_WIDTH_16: 3812 WARN_ON_ONCE(1); 3813 /* keep c->width */ 3814 conn->mode = IEEE80211_CONN_MODE_S1G; 3815 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3816 break; 3817 case NL80211_CHAN_WIDTH_5: 3818 case NL80211_CHAN_WIDTH_10: 3819 WARN_ON_ONCE(1); 3820 /* keep c->width */ 3821 conn->mode = IEEE80211_CONN_MODE_LEGACY; 3822 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 3823 break; 3824 } 3825 3826 if (new_primary_width != NL80211_CHAN_WIDTH_20_NOHT) { 3827 c->center_freq1 = cfg80211_chandef_primary(c, new_primary_width, 3828 &c->punctured); 3829 c->width = new_primary_width; 3830 } 3831 3832 /* 3833 * With an 80 MHz channel, we might have the puncturing in the primary 3834 * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width. 3835 * In that case, downgrade again. 3836 */ 3837 if (!cfg80211_chandef_valid(c) && c->punctured) 3838 goto again; 3839 3840 WARN_ON_ONCE(!cfg80211_chandef_valid(c)); 3841 } 3842 3843 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata, 3844 struct cfg80211_csa_settings *csa_settings) 3845 { 3846 int hdr_len = IEEE80211_MIN_ACTION_SIZE(chan_switch); 3847 struct sk_buff *skb; 3848 struct ieee80211_mgmt *mgmt; 3849 struct ieee80211_local *local = sdata->local; 3850 int freq; 3851 u8 *pos; 3852 3853 if (sdata->vif.type != NL80211_IFTYPE_ADHOC && 3854 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) 3855 return -EOPNOTSUPP; 3856 3857 skb = dev_alloc_skb(local->tx_headroom + hdr_len + 3858 5 + /* channel switch announcement element */ 3859 3 + /* secondary channel offset element */ 3860 5 + /* wide bandwidth channel switch announcement */ 3861 8); /* mesh channel switch parameters element */ 3862 if (!skb) 3863 return -ENOMEM; 3864 3865 skb_reserve(skb, local->tx_headroom); 3866 mgmt = skb_put_zero(skb, hdr_len); 3867 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 3868 IEEE80211_STYPE_ACTION); 3869 3870 eth_broadcast_addr(mgmt->da); 3871 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 3872 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3873 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 3874 } else { 3875 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss; 3876 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN); 3877 } 3878 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT; 3879 mgmt->u.action.action_code = WLAN_ACTION_SPCT_CHL_SWITCH; 3880 pos = skb_put(skb, 5); 3881 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */ 3882 *pos++ = 3; /* IE length */ 3883 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */ 3884 freq = csa_settings->chandef.chan->center_freq; 3885 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */ 3886 *pos++ = csa_settings->count; /* count */ 3887 3888 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) { 3889 enum nl80211_channel_type ch_type; 3890 3891 skb_put(skb, 3); 3892 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */ 3893 *pos++ = 1; /* IE length */ 3894 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef); 3895 if (ch_type == NL80211_CHAN_HT40PLUS) 3896 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 3897 else 3898 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 3899 } 3900 3901 if (ieee80211_vif_is_mesh(&sdata->vif)) { 3902 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; 3903 3904 skb_put(skb, 8); 3905 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */ 3906 *pos++ = 6; /* IE length */ 3907 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */ 3908 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */ 3909 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR; 3910 *pos++ |= csa_settings->block_tx ? 3911 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00; 3912 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */ 3913 pos += 2; 3914 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */ 3915 pos += 2; 3916 } 3917 3918 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 || 3919 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 || 3920 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) { 3921 skb_put(skb, 5); 3922 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef); 3923 } 3924 3925 ieee80211_tx_skb(sdata, skb); 3926 return 0; 3927 } 3928 3929 static bool 3930 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i) 3931 { 3932 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1); 3933 int skip; 3934 3935 if (end > 0) 3936 return false; 3937 3938 /* One shot NOA */ 3939 if (data->count[i] == 1) 3940 return false; 3941 3942 if (data->desc[i].interval == 0) 3943 return false; 3944 3945 /* End time is in the past, check for repetitions */ 3946 skip = DIV_ROUND_UP(-end, data->desc[i].interval); 3947 if (data->count[i] < 255) { 3948 if (data->count[i] <= skip) { 3949 data->count[i] = 0; 3950 return false; 3951 } 3952 3953 data->count[i] -= skip; 3954 } 3955 3956 data->desc[i].start += skip * data->desc[i].interval; 3957 3958 return true; 3959 } 3960 3961 static bool 3962 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf, 3963 s32 *offset) 3964 { 3965 bool ret = false; 3966 int i; 3967 3968 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 3969 s32 cur; 3970 3971 if (!data->count[i]) 3972 continue; 3973 3974 if (ieee80211_extend_noa_desc(data, tsf + *offset, i)) 3975 ret = true; 3976 3977 cur = data->desc[i].start - tsf; 3978 if (cur > *offset) 3979 continue; 3980 3981 cur = data->desc[i].start + data->desc[i].duration - tsf; 3982 if (cur > *offset) 3983 *offset = cur; 3984 } 3985 3986 return ret; 3987 } 3988 3989 static u32 3990 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf) 3991 { 3992 s32 offset = 0; 3993 int tries = 0; 3994 /* 3995 * arbitrary limit, used to avoid infinite loops when combined NoA 3996 * descriptors cover the full time period. 3997 */ 3998 int max_tries = 5; 3999 4000 ieee80211_extend_absent_time(data, tsf, &offset); 4001 do { 4002 if (!ieee80211_extend_absent_time(data, tsf, &offset)) 4003 break; 4004 4005 tries++; 4006 } while (tries < max_tries); 4007 4008 return offset; 4009 } 4010 4011 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf) 4012 { 4013 u32 next_offset = BIT(31) - 1; 4014 int i; 4015 4016 data->absent = 0; 4017 data->has_next_tsf = false; 4018 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4019 s32 start; 4020 4021 if (!data->count[i]) 4022 continue; 4023 4024 ieee80211_extend_noa_desc(data, tsf, i); 4025 start = data->desc[i].start - tsf; 4026 if (start <= 0) 4027 data->absent |= BIT(i); 4028 4029 if (next_offset > start) 4030 next_offset = start; 4031 4032 data->has_next_tsf = true; 4033 } 4034 4035 if (data->absent) 4036 next_offset = ieee80211_get_noa_absent_time(data, tsf); 4037 4038 data->next_tsf = tsf + next_offset; 4039 } 4040 EXPORT_SYMBOL(ieee80211_update_p2p_noa); 4041 4042 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr, 4043 struct ieee80211_noa_data *data, u32 tsf) 4044 { 4045 int ret = 0; 4046 int i; 4047 4048 memset(data, 0, sizeof(*data)); 4049 4050 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) { 4051 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i]; 4052 4053 if (!desc->count || !desc->duration) 4054 continue; 4055 4056 data->count[i] = desc->count; 4057 data->desc[i].start = le32_to_cpu(desc->start_time); 4058 data->desc[i].duration = le32_to_cpu(desc->duration); 4059 data->desc[i].interval = le32_to_cpu(desc->interval); 4060 4061 if (data->count[i] > 1 && 4062 data->desc[i].interval < data->desc[i].duration) 4063 continue; 4064 4065 ieee80211_extend_noa_desc(data, tsf, i); 4066 ret++; 4067 } 4068 4069 if (ret) 4070 ieee80211_update_p2p_noa(data, tsf); 4071 4072 return ret; 4073 } 4074 EXPORT_SYMBOL(ieee80211_parse_p2p_noa); 4075 4076 void ieee80211_recalc_dtim(struct ieee80211_sub_if_data *sdata, u64 tsf) 4077 { 4078 u64 dtim_count = 0; 4079 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4080 u8 dtim_period = sdata->vif.bss_conf.dtim_period; 4081 struct ps_data *ps; 4082 u8 bcns_from_dtim; 4083 4084 if (tsf == -1ULL || !beacon_int || !dtim_period) 4085 return; 4086 4087 if (sdata->vif.type == NL80211_IFTYPE_AP || 4088 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) { 4089 if (!sdata->bss) 4090 return; 4091 4092 ps = &sdata->bss->ps; 4093 } else if (ieee80211_vif_is_mesh(&sdata->vif)) { 4094 ps = &sdata->u.mesh.ps; 4095 } else { 4096 return; 4097 } 4098 4099 /* 4100 * actually finds last dtim_count, mac80211 will update in 4101 * __beacon_add_tim(). 4102 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period 4103 */ 4104 do_div(tsf, beacon_int); 4105 bcns_from_dtim = do_div(tsf, dtim_period); 4106 /* just had a DTIM */ 4107 if (!bcns_from_dtim) 4108 dtim_count = 0; 4109 else 4110 dtim_count = dtim_period - bcns_from_dtim; 4111 4112 ps->dtim_count = dtim_count; 4113 } 4114 4115 /* 4116 * Given a long beacon period, calculate the current index into 4117 * that period to determine the number of TSBTTs until the next TBTT. 4118 * It is completely valid to have a short beacon period that differs 4119 * from the dtim period (i.e a TBTT thats not a DTIM). 4120 */ 4121 void ieee80211_recalc_sb_count(struct ieee80211_sub_if_data *sdata, u64 tsf) 4122 { 4123 u32 sb_idx; 4124 struct ps_data *ps = &sdata->bss->ps; 4125 u8 lb_period = sdata->vif.bss_conf.s1g_long_beacon_period; 4126 u32 beacon_int = sdata->vif.bss_conf.beacon_int * 1024; 4127 4128 /* No mesh / IBSS support for short beaconing */ 4129 if (tsf == -1ULL || !lb_period || 4130 (sdata->vif.type != NL80211_IFTYPE_AP && 4131 sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) 4132 return; 4133 4134 /* find the current TSBTT index in our lb_period */ 4135 do_div(tsf, beacon_int); 4136 sb_idx = do_div(tsf, lb_period); 4137 4138 /* num TSBTTs until the next TBTT */ 4139 ps->sb_count = sb_idx ? lb_period - sb_idx : 0; 4140 } 4141 4142 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local, 4143 struct ieee80211_chanctx *ctx) 4144 { 4145 struct ieee80211_link_data *link; 4146 u8 radar_detect = 0; 4147 4148 lockdep_assert_wiphy(local->hw.wiphy); 4149 4150 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)) 4151 return 0; 4152 4153 for_each_sdata_link(local, link) { 4154 if (rcu_access_pointer(link->conf->chanctx_conf) == &ctx->conf) { 4155 /* 4156 * An in-place reservation context should not have any 4157 * assigned links until it replaces the other context. 4158 */ 4159 WARN_ON(ctx->replace_state == 4160 IEEE80211_CHANCTX_REPLACES_OTHER); 4161 4162 if (link->radar_required) 4163 radar_detect |= 4164 BIT(link->conf->chanreq.oper.width); 4165 } 4166 4167 if (link->reserved_chanctx == ctx && 4168 link->reserved_radar_required) 4169 radar_detect |= BIT(link->reserved.oper.width); 4170 } 4171 4172 return radar_detect; 4173 } 4174 4175 bool ieee80211_is_radio_idx_in_scan_req(struct wiphy *wiphy, 4176 struct cfg80211_scan_request *scan_req, 4177 int radio_idx) 4178 { 4179 struct ieee80211_channel *chan; 4180 int i, chan_radio_idx; 4181 4182 for (i = 0; i < scan_req->n_channels; i++) { 4183 chan = scan_req->channels[i]; 4184 chan_radio_idx = cfg80211_get_radio_idx_by_chan(wiphy, chan); 4185 4186 /* The radio index either matched successfully, or an error 4187 * occurred. For example, if radio-level information is 4188 * missing, the same error value is returned. This 4189 * typically implies a single-radio setup, in which case 4190 * the operation should not be allowed. 4191 */ 4192 if (chan_radio_idx == radio_idx) 4193 return true; 4194 } 4195 4196 return false; 4197 } 4198 4199 static u32 4200 __ieee80211_get_radio_mask(struct ieee80211_sub_if_data *sdata) 4201 { 4202 struct ieee80211_bss_conf *link_conf; 4203 struct ieee80211_chanctx_conf *conf; 4204 unsigned int link_id; 4205 u32 mask = 0; 4206 4207 for_each_vif_active_link(&sdata->vif, link_conf, link_id) { 4208 conf = sdata_dereference(link_conf->chanctx_conf, sdata); 4209 if (!conf || conf->radio_idx < 0) 4210 continue; 4211 4212 mask |= BIT(conf->radio_idx); 4213 } 4214 4215 return mask; 4216 } 4217 4218 u32 ieee80211_get_radio_mask(struct wiphy *wiphy, struct net_device *dev) 4219 { 4220 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); 4221 4222 return __ieee80211_get_radio_mask(sdata); 4223 } 4224 4225 static bool 4226 ieee80211_sdata_uses_radio(struct ieee80211_sub_if_data *sdata, int radio_idx) 4227 { 4228 if (radio_idx < 0) 4229 return true; 4230 4231 return __ieee80211_get_radio_mask(sdata) & BIT(radio_idx); 4232 } 4233 4234 static int 4235 ieee80211_fill_ifcomb_params(struct ieee80211_local *local, 4236 struct iface_combination_params *params, 4237 const struct cfg80211_chan_def *chandef, 4238 struct ieee80211_sub_if_data *sdata) 4239 { 4240 struct ieee80211_sub_if_data *sdata_iter; 4241 struct ieee80211_chanctx *ctx; 4242 int total = !!sdata; 4243 4244 list_for_each_entry(ctx, &local->chanctx_list, list) { 4245 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) 4246 continue; 4247 4248 if (params->radio_idx >= 0 && 4249 ctx->conf.radio_idx != params->radio_idx) 4250 continue; 4251 4252 params->radar_detect |= 4253 ieee80211_chanctx_radar_detect(local, ctx); 4254 4255 if (chandef && ctx->mode != IEEE80211_CHANCTX_EXCLUSIVE && 4256 cfg80211_chandef_compatible(chandef, &ctx->conf.def)) 4257 continue; 4258 4259 params->num_different_channels++; 4260 } 4261 4262 list_for_each_entry(sdata_iter, &local->interfaces, list) { 4263 struct wireless_dev *wdev_iter; 4264 4265 wdev_iter = &sdata_iter->wdev; 4266 4267 if (sdata_iter == sdata || 4268 !ieee80211_sdata_running(sdata_iter) || 4269 cfg80211_iftype_allowed(local->hw.wiphy, 4270 wdev_iter->iftype, 0, 1)) 4271 continue; 4272 4273 if (!ieee80211_sdata_uses_radio(sdata_iter, params->radio_idx)) 4274 continue; 4275 4276 params->iftype_num[wdev_iter->iftype]++; 4277 total++; 4278 } 4279 4280 return total; 4281 } 4282 4283 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata, 4284 const struct cfg80211_chan_def *chandef, 4285 enum ieee80211_chanctx_mode chanmode, 4286 u8 radar_detect, int radio_idx) 4287 { 4288 bool shared = chanmode == IEEE80211_CHANCTX_SHARED; 4289 struct ieee80211_local *local = sdata->local; 4290 enum nl80211_iftype iftype = sdata->wdev.iftype; 4291 struct iface_combination_params params = { 4292 .radar_detect = radar_detect, 4293 .radio_idx = radio_idx, 4294 }; 4295 int total; 4296 4297 lockdep_assert_wiphy(local->hw.wiphy); 4298 4299 if (WARN_ON(hweight32(radar_detect) > 1)) 4300 return -EINVAL; 4301 4302 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED && 4303 !chandef->chan)) 4304 return -EINVAL; 4305 4306 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES)) 4307 return -EINVAL; 4308 4309 if (sdata->vif.type == NL80211_IFTYPE_AP || 4310 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { 4311 /* 4312 * always passing this is harmless, since it'll be the 4313 * same value that cfg80211 finds if it finds the same 4314 * interface ... and that's always allowed 4315 */ 4316 params.new_beacon_int = sdata->vif.bss_conf.beacon_int; 4317 } 4318 4319 /* Always allow software iftypes */ 4320 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) { 4321 if (radar_detect) 4322 return -EINVAL; 4323 return 0; 4324 } 4325 4326 if (chandef) 4327 params.num_different_channels = 1; 4328 4329 if (iftype != NL80211_IFTYPE_UNSPECIFIED) 4330 params.iftype_num[iftype] = 1; 4331 4332 total = ieee80211_fill_ifcomb_params(local, ¶ms, 4333 shared ? chandef : NULL, 4334 sdata); 4335 if (total == 1 && !params.radar_detect) 4336 return 0; 4337 4338 return cfg80211_check_combinations(local->hw.wiphy, ¶ms); 4339 } 4340 4341 static void 4342 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c, 4343 void *data) 4344 { 4345 u32 *max_num_different_channels = data; 4346 4347 *max_num_different_channels = max(*max_num_different_channels, 4348 c->num_different_channels); 4349 } 4350 4351 int ieee80211_max_num_channels(struct ieee80211_local *local, int radio_idx) 4352 { 4353 u32 max_num_different_channels = 1; 4354 int err; 4355 struct iface_combination_params params = { 4356 .radio_idx = radio_idx, 4357 }; 4358 4359 lockdep_assert_wiphy(local->hw.wiphy); 4360 4361 ieee80211_fill_ifcomb_params(local, ¶ms, NULL, NULL); 4362 4363 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms, 4364 ieee80211_iter_max_chans, 4365 &max_num_different_channels); 4366 if (err < 0) 4367 return err; 4368 4369 return max_num_different_channels; 4370 } 4371 4372 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata, 4373 struct ieee80211_sta_s1g_cap *caps, 4374 struct sk_buff *skb) 4375 { 4376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4377 struct ieee80211_s1g_cap s1g_capab; 4378 u8 *pos; 4379 int i; 4380 4381 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4382 return; 4383 4384 if (!caps->s1g) 4385 return; 4386 4387 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap)); 4388 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs)); 4389 4390 /* override the capability info */ 4391 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) { 4392 u8 mask = ifmgd->s1g_capa_mask.capab_info[i]; 4393 4394 s1g_capab.capab_info[i] &= ~mask; 4395 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask; 4396 } 4397 4398 /* then MCS and NSS set */ 4399 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) { 4400 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i]; 4401 4402 s1g_capab.supp_mcs_nss[i] &= ~mask; 4403 s1g_capab.supp_mcs_nss[i] |= 4404 ifmgd->s1g_capa.supp_mcs_nss[i] & mask; 4405 } 4406 4407 pos = skb_put(skb, 2 + sizeof(s1g_capab)); 4408 *pos++ = WLAN_EID_S1G_CAPABILITIES; 4409 *pos++ = sizeof(s1g_capab); 4410 4411 memcpy(pos, &s1g_capab, sizeof(s1g_capab)); 4412 } 4413 4414 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata, 4415 struct sk_buff *skb) 4416 { 4417 u8 *pos = skb_put(skb, 3); 4418 4419 *pos++ = WLAN_EID_AID_REQUEST; 4420 *pos++ = 1; 4421 *pos++ = 0; 4422 } 4423 4424 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo) 4425 { 4426 *buf++ = WLAN_EID_VENDOR_SPECIFIC; 4427 *buf++ = 7; /* len */ 4428 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */ 4429 *buf++ = 0x50; 4430 *buf++ = 0xf2; 4431 *buf++ = 2; /* WME */ 4432 *buf++ = 0; /* WME info */ 4433 *buf++ = 1; /* WME ver */ 4434 *buf++ = qosinfo; /* U-APSD no in use */ 4435 4436 return buf; 4437 } 4438 4439 void ieee80211_txq_get_depth(struct ieee80211_txq *txq, 4440 unsigned long *frame_cnt, 4441 unsigned long *byte_cnt) 4442 { 4443 struct txq_info *txqi = to_txq_info(txq); 4444 u32 frag_cnt = 0, frag_bytes = 0; 4445 struct sk_buff *skb; 4446 4447 skb_queue_walk(&txqi->frags, skb) { 4448 frag_cnt++; 4449 frag_bytes += skb->len; 4450 } 4451 4452 if (frame_cnt) 4453 *frame_cnt = txqi->tin.backlog_packets + frag_cnt; 4454 4455 if (byte_cnt) 4456 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes; 4457 } 4458 EXPORT_SYMBOL(ieee80211_txq_get_depth); 4459 4460 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { 4461 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO, 4462 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI, 4463 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, 4464 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK 4465 }; 4466 4467 u16 ieee80211_encode_usf(int listen_interval) 4468 { 4469 static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; 4470 u16 ui, usf = 0; 4471 4472 /* find greatest USF */ 4473 while (usf < IEEE80211_MAX_USF) { 4474 if (listen_interval % listen_int_usf[usf + 1]) 4475 break; 4476 usf += 1; 4477 } 4478 ui = listen_interval / listen_int_usf[usf]; 4479 4480 /* error if there is a remainder. Should've been checked by user */ 4481 WARN_ON_ONCE(ui > IEEE80211_MAX_UI); 4482 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) | 4483 FIELD_PREP(LISTEN_INT_UI, ui); 4484 4485 return (u16) listen_interval; 4486 } 4487 4488 /* this may return more than ieee80211_put_eht_cap() will need */ 4489 u8 ieee80211_ie_len_eht_cap(struct ieee80211_sub_if_data *sdata) 4490 { 4491 const struct ieee80211_sta_he_cap *he_cap; 4492 const struct ieee80211_sta_eht_cap *eht_cap; 4493 struct ieee80211_supported_band *sband; 4494 bool is_ap; 4495 u8 n; 4496 4497 sband = ieee80211_get_sband(sdata); 4498 if (!sband) 4499 return 0; 4500 4501 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4502 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4503 if (!he_cap || !eht_cap) 4504 return 0; 4505 4506 is_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4507 4508 n = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4509 &eht_cap->eht_cap_elem, 4510 is_ap); 4511 return 2 + 1 + 4512 sizeof(eht_cap->eht_cap_elem) + n + 4513 ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4514 eht_cap->eht_cap_elem.phy_cap_info); 4515 return 0; 4516 } 4517 4518 int ieee80211_put_eht_cap(struct sk_buff *skb, 4519 struct ieee80211_sub_if_data *sdata, 4520 const struct ieee80211_supported_band *sband, 4521 const struct ieee80211_conn_settings *conn) 4522 { 4523 const struct ieee80211_sta_he_cap *he_cap = 4524 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4525 const struct ieee80211_sta_eht_cap *eht_cap = 4526 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4527 bool for_ap = sdata->vif.type == NL80211_IFTYPE_AP; 4528 struct ieee80211_eht_cap_elem_fixed fixed; 4529 struct ieee80211_he_cap_elem he; 4530 u8 mcs_nss_len, ppet_len; 4531 u8 orig_mcs_nss_len; 4532 u8 ie_len; 4533 4534 if (!conn) 4535 conn = &ieee80211_conn_settings_unlimited; 4536 4537 /* Make sure we have place for the IE */ 4538 if (!he_cap || !eht_cap) 4539 return 0; 4540 4541 orig_mcs_nss_len = ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem, 4542 &eht_cap->eht_cap_elem, 4543 for_ap); 4544 4545 ieee80211_get_adjusted_he_cap(conn, he_cap, &he); 4546 4547 fixed = eht_cap->eht_cap_elem; 4548 4549 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_80) 4550 fixed.phy_cap_info[6] &= 4551 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_80MHZ; 4552 4553 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_160) { 4554 fixed.phy_cap_info[1] &= 4555 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_160MHZ_MASK; 4556 fixed.phy_cap_info[2] &= 4557 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_160MHZ_MASK; 4558 fixed.phy_cap_info[6] &= 4559 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_160MHZ; 4560 } 4561 4562 if (conn->bw_limit < IEEE80211_CONN_BW_LIMIT_320) { 4563 fixed.phy_cap_info[0] &= 4564 ~IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ; 4565 fixed.phy_cap_info[1] &= 4566 ~IEEE80211_EHT_PHY_CAP1_BEAMFORMEE_SS_320MHZ_MASK; 4567 fixed.phy_cap_info[2] &= 4568 ~IEEE80211_EHT_PHY_CAP2_SOUNDING_DIM_320MHZ_MASK; 4569 fixed.phy_cap_info[6] &= 4570 ~IEEE80211_EHT_PHY_CAP6_MCS15_SUPP_320MHZ; 4571 } 4572 4573 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) 4574 fixed.phy_cap_info[0] &= 4575 ~IEEE80211_EHT_PHY_CAP0_242_TONE_RU_GT20MHZ; 4576 4577 mcs_nss_len = ieee80211_eht_mcs_nss_size(&he, &fixed, for_ap); 4578 ppet_len = ieee80211_eht_ppe_size(eht_cap->eht_ppe_thres[0], 4579 fixed.phy_cap_info); 4580 4581 ie_len = 2 + 1 + sizeof(eht_cap->eht_cap_elem) + mcs_nss_len + ppet_len; 4582 if (skb_tailroom(skb) < ie_len) 4583 return -ENOBUFS; 4584 4585 skb_put_u8(skb, WLAN_EID_EXTENSION); 4586 skb_put_u8(skb, ie_len - 2); 4587 skb_put_u8(skb, WLAN_EID_EXT_EHT_CAPABILITY); 4588 skb_put_data(skb, &fixed, sizeof(fixed)); 4589 4590 if (mcs_nss_len == 4 && orig_mcs_nss_len != 4) { 4591 /* 4592 * If the (non-AP) STA became 20 MHz only, then convert from 4593 * <=80 to 20-MHz-only format, where MCSes are indicated in 4594 * the groups 0-7, 8-9, 10-11, 12-13 rather than just 0-9, 4595 * 10-11, 12-13. Thus, use 0-9 for 0-7 and 8-9. 4596 */ 4597 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4598 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs9_max_nss); 4599 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs11_max_nss); 4600 skb_put_u8(skb, eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_mcs13_max_nss); 4601 } else { 4602 skb_put_data(skb, &eht_cap->eht_mcs_nss_supp, mcs_nss_len); 4603 } 4604 4605 if (ppet_len) 4606 skb_put_data(skb, &eht_cap->eht_ppe_thres, ppet_len); 4607 4608 return 0; 4609 } 4610 4611 int ieee80211_put_uhr_cap(struct sk_buff *skb, 4612 struct ieee80211_sub_if_data *sdata, 4613 const struct ieee80211_supported_band *sband) 4614 { 4615 const struct ieee80211_sta_uhr_cap *uhr_cap = 4616 ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 4617 int len; 4618 4619 if (!uhr_cap) 4620 return 0; 4621 4622 len = 2 + 1 + sizeof(struct ieee80211_uhr_cap) + 4623 sizeof(struct ieee80211_uhr_cap_phy); 4624 4625 if (skb_tailroom(skb) < len) 4626 return -ENOBUFS; 4627 4628 skb_put_u8(skb, WLAN_EID_EXTENSION); 4629 skb_put_u8(skb, len - 2); 4630 skb_put_u8(skb, WLAN_EID_EXT_UHR_CAPA); 4631 skb_put_data(skb, &uhr_cap->mac, sizeof(uhr_cap->mac)); 4632 skb_put_data(skb, &uhr_cap->phy, sizeof(uhr_cap->phy)); 4633 4634 return 0; 4635 } 4636 4637 const char *ieee80211_conn_mode_str(enum ieee80211_conn_mode mode) 4638 { 4639 static const char * const modes[] = { 4640 [IEEE80211_CONN_MODE_S1G] = "S1G", 4641 [IEEE80211_CONN_MODE_LEGACY] = "legacy", 4642 [IEEE80211_CONN_MODE_HT] = "HT", 4643 [IEEE80211_CONN_MODE_VHT] = "VHT", 4644 [IEEE80211_CONN_MODE_HE] = "HE", 4645 [IEEE80211_CONN_MODE_EHT] = "EHT", 4646 [IEEE80211_CONN_MODE_UHR] = "UHR", 4647 }; 4648 4649 if (WARN_ON(mode >= ARRAY_SIZE(modes))) 4650 return "<out of range>"; 4651 4652 return modes[mode] ?: "<missing string>"; 4653 } 4654 4655 enum ieee80211_conn_bw_limit 4656 ieee80211_min_bw_limit_from_chandef(struct cfg80211_chan_def *chandef) 4657 { 4658 switch (chandef->width) { 4659 case NL80211_CHAN_WIDTH_20_NOHT: 4660 case NL80211_CHAN_WIDTH_20: 4661 return IEEE80211_CONN_BW_LIMIT_20; 4662 case NL80211_CHAN_WIDTH_40: 4663 return IEEE80211_CONN_BW_LIMIT_40; 4664 case NL80211_CHAN_WIDTH_80: 4665 return IEEE80211_CONN_BW_LIMIT_80; 4666 case NL80211_CHAN_WIDTH_80P80: 4667 case NL80211_CHAN_WIDTH_160: 4668 return IEEE80211_CONN_BW_LIMIT_160; 4669 case NL80211_CHAN_WIDTH_320: 4670 return IEEE80211_CONN_BW_LIMIT_320; 4671 default: 4672 WARN(1, "unhandled chandef width %d\n", chandef->width); 4673 return IEEE80211_CONN_BW_LIMIT_20; 4674 } 4675 } 4676 4677 void ieee80211_clear_tpe(struct ieee80211_parsed_tpe *tpe) 4678 { 4679 for (int i = 0; i < 2; i++) { 4680 tpe->max_local[i].valid = false; 4681 memset(tpe->max_local[i].power, 4682 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4683 sizeof(tpe->max_local[i].power)); 4684 4685 tpe->max_reg_client[i].valid = false; 4686 memset(tpe->max_reg_client[i].power, 4687 IEEE80211_TPE_MAX_TX_PWR_NO_CONSTRAINT, 4688 sizeof(tpe->max_reg_client[i].power)); 4689 4690 tpe->psd_local[i].valid = false; 4691 memset(tpe->psd_local[i].power, 4692 IEEE80211_TPE_PSD_NO_LIMIT, 4693 sizeof(tpe->psd_local[i].power)); 4694 4695 tpe->psd_reg_client[i].valid = false; 4696 memset(tpe->psd_reg_client[i].power, 4697 IEEE80211_TPE_PSD_NO_LIMIT, 4698 sizeof(tpe->psd_reg_client[i].power)); 4699 } 4700 } 4701 4702 bool ieee80211_vif_nan_started(struct ieee80211_vif *vif) 4703 { 4704 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4705 4706 return vif->type == NL80211_IFTYPE_NAN && sdata->u.nan.started; 4707 } 4708 EXPORT_SYMBOL_GPL(ieee80211_vif_nan_started); 4709