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