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 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2025 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/dropreason.h> 26 #include <net/cfg80211.h> 27 #include <net/addrconf.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wep.h" 34 #include "led.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_allmultis)) 44 new_flags |= FIF_ALLMULTI; 45 46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 48 new_flags |= FIF_BCN_PRBRESP_PROMISC; 49 50 if (local->fif_probe_req || local->probe_req_reg) 51 new_flags |= FIF_PROBE_REQ; 52 53 if (local->fif_fcsfail) 54 new_flags |= FIF_FCSFAIL; 55 56 if (local->fif_plcpfail) 57 new_flags |= FIF_PLCPFAIL; 58 59 if (local->fif_control) 60 new_flags |= FIF_CONTROL; 61 62 if (local->fif_other_bss) 63 new_flags |= FIF_OTHER_BSS; 64 65 if (local->fif_pspoll) 66 new_flags |= FIF_PSPOLL; 67 68 if (local->rx_mcast_action_reg) 69 new_flags |= FIF_MCAST_ACTION; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct wiphy *wiphy, 88 struct wiphy_work *work) 89 { 90 struct ieee80211_local *local = 91 container_of(work, struct ieee80211_local, reconfig_filter); 92 93 ieee80211_configure_filter(local); 94 } 95 96 static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local, 97 struct ieee80211_chanctx_conf *ctx) 98 { 99 struct ieee80211_sub_if_data *sdata; 100 struct cfg80211_chan_def chandef = {}; 101 struct cfg80211_chan_def *oper = NULL; 102 enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC; 103 u32 changed = 0; 104 int power; 105 u32 offchannel_flag; 106 107 if (!local->emulate_chanctx) 108 return 0; 109 110 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 111 112 if (ctx && !WARN_ON(!ctx->def.chan)) { 113 oper = &ctx->def; 114 if (ctx->rx_chains_static > 1) 115 smps_mode = IEEE80211_SMPS_OFF; 116 else if (ctx->rx_chains_dynamic > 1) 117 smps_mode = IEEE80211_SMPS_DYNAMIC; 118 else 119 smps_mode = IEEE80211_SMPS_STATIC; 120 } 121 122 if (local->scan_chandef.chan) { 123 chandef = local->scan_chandef; 124 } else if (local->tmp_channel) { 125 chandef.chan = local->tmp_channel; 126 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 127 chandef.center_freq1 = chandef.chan->center_freq; 128 chandef.freq1_offset = chandef.chan->freq_offset; 129 } else if (oper) { 130 chandef = *oper; 131 } else { 132 chandef = local->dflt_chandef; 133 } 134 135 if (WARN(!cfg80211_chandef_valid(&chandef), 136 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 137 chandef.chan ? chandef.chan->center_freq : -1, 138 chandef.chan ? chandef.chan->freq_offset : 0, 139 chandef.width, chandef.center_freq1, chandef.freq1_offset, 140 chandef.center_freq2)) 141 return 0; 142 143 if (!oper || !cfg80211_chandef_identical(&chandef, oper)) 144 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 145 else 146 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 147 148 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 149 150 /* force it also for scanning, since drivers might config differently */ 151 if (offchannel_flag || local->scanning || local->in_reconfig || 152 !cfg80211_chandef_identical(&local->hw.conf.chandef, &chandef)) { 153 local->hw.conf.chandef = chandef; 154 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 155 } 156 157 if (!conf_is_ht(&local->hw.conf)) { 158 /* 159 * mac80211.h documents that this is only valid 160 * when the channel is set to an HT type, and 161 * that otherwise STATIC is used. 162 */ 163 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 164 } else if (local->hw.conf.smps_mode != smps_mode) { 165 local->hw.conf.smps_mode = smps_mode; 166 changed |= IEEE80211_CONF_CHANGE_SMPS; 167 } 168 169 power = ieee80211_chandef_max_power(&chandef); 170 if (local->user_power_level != IEEE80211_UNSET_POWER_LEVEL) 171 power = min(local->user_power_level, power); 172 173 rcu_read_lock(); 174 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 175 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 176 continue; 177 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 178 continue; 179 if (sdata->vif.bss_conf.txpower == INT_MIN) 180 continue; 181 power = min(power, sdata->vif.bss_conf.txpower); 182 } 183 rcu_read_unlock(); 184 185 if (local->hw.conf.power_level != power) { 186 changed |= IEEE80211_CONF_CHANGE_POWER; 187 local->hw.conf.power_level = power; 188 } 189 190 return changed; 191 } 192 193 int ieee80211_hw_config(struct ieee80211_local *local, int radio_idx, 194 u32 changed) 195 { 196 int ret = 0; 197 198 might_sleep(); 199 200 WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL | 201 IEEE80211_CONF_CHANGE_POWER | 202 IEEE80211_CONF_CHANGE_SMPS)); 203 204 if (changed && local->open_count) { 205 ret = drv_config(local, radio_idx, changed); 206 /* 207 * Goal: 208 * HW reconfiguration should never fail, the driver has told 209 * us what it can support so it should live up to that promise. 210 * 211 * Current status: 212 * rfkill is not integrated with mac80211 and a 213 * configuration command can thus fail if hardware rfkill 214 * is enabled 215 * 216 * FIXME: integrate rfkill with mac80211 and then add this 217 * WARN_ON() back 218 * 219 */ 220 /* WARN_ON(ret); */ 221 } 222 223 return ret; 224 } 225 226 /* for scanning, offchannel and chanctx emulation only */ 227 static int _ieee80211_hw_conf_chan(struct ieee80211_local *local, 228 struct ieee80211_chanctx_conf *ctx) 229 { 230 u32 changed; 231 232 if (!local->open_count) 233 return 0; 234 235 changed = ieee80211_calc_hw_conf_chan(local, ctx); 236 if (!changed) 237 return 0; 238 239 return drv_config(local, -1, changed); 240 } 241 242 int ieee80211_hw_conf_chan(struct ieee80211_local *local) 243 { 244 struct ieee80211_chanctx *ctx; 245 246 ctx = list_first_entry_or_null(&local->chanctx_list, 247 struct ieee80211_chanctx, 248 list); 249 250 return _ieee80211_hw_conf_chan(local, ctx ? &ctx->conf : NULL); 251 } 252 253 void ieee80211_hw_conf_init(struct ieee80211_local *local) 254 { 255 u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL | 256 IEEE80211_CONF_CHANGE_POWER | 257 IEEE80211_CONF_CHANGE_SMPS); 258 259 if (WARN_ON(!local->open_count)) 260 return; 261 262 if (local->emulate_chanctx) { 263 struct ieee80211_chanctx *ctx; 264 265 ctx = list_first_entry_or_null(&local->chanctx_list, 266 struct ieee80211_chanctx, 267 list); 268 269 changed |= ieee80211_calc_hw_conf_chan(local, 270 ctx ? &ctx->conf : NULL); 271 } 272 273 WARN_ON(drv_config(local, -1, changed)); 274 } 275 276 int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw, 277 struct ieee80211_chanctx_conf *ctx) 278 { 279 struct ieee80211_local *local = hw_to_local(hw); 280 281 local->hw.conf.radar_enabled = ctx->radar_enabled; 282 283 return _ieee80211_hw_conf_chan(local, ctx); 284 } 285 EXPORT_SYMBOL(ieee80211_emulate_add_chanctx); 286 287 void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw, 288 struct ieee80211_chanctx_conf *ctx) 289 { 290 struct ieee80211_local *local = hw_to_local(hw); 291 292 local->hw.conf.radar_enabled = false; 293 294 _ieee80211_hw_conf_chan(local, NULL); 295 } 296 EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx); 297 298 void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw, 299 struct ieee80211_chanctx_conf *ctx, 300 u32 changed) 301 { 302 struct ieee80211_local *local = hw_to_local(hw); 303 304 local->hw.conf.radar_enabled = ctx->radar_enabled; 305 306 _ieee80211_hw_conf_chan(local, ctx); 307 } 308 EXPORT_SYMBOL(ieee80211_emulate_change_chanctx); 309 310 int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw, 311 struct ieee80211_vif_chanctx_switch *vifs, 312 int n_vifs, 313 enum ieee80211_chanctx_switch_mode mode) 314 { 315 struct ieee80211_local *local = hw_to_local(hw); 316 317 if (n_vifs <= 0) 318 return -EINVAL; 319 320 local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled; 321 _ieee80211_hw_conf_chan(local, vifs[0].new_ctx); 322 323 return 0; 324 } 325 EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx); 326 327 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 328 BSS_CHANGED_IDLE |\ 329 BSS_CHANGED_PS |\ 330 BSS_CHANGED_IBSS |\ 331 BSS_CHANGED_ARP_FILTER |\ 332 BSS_CHANGED_SSID |\ 333 BSS_CHANGED_MLD_VALID_LINKS |\ 334 BSS_CHANGED_MLD_TTLM) 335 336 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 337 u64 changed) 338 { 339 struct ieee80211_local *local = sdata->local; 340 341 might_sleep(); 342 343 WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif)); 344 345 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 346 return; 347 348 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 349 BSS_CHANGED_BEACON_ENABLED) && 350 sdata->vif.type != NL80211_IFTYPE_AP && 351 sdata->vif.type != NL80211_IFTYPE_ADHOC && 352 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 353 sdata->vif.type != NL80211_IFTYPE_OCB)) 354 return; 355 356 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 357 sdata->vif.type == NL80211_IFTYPE_NAN || 358 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 359 !sdata->vif.bss_conf.mu_mimo_owner && 360 !(changed & BSS_CHANGED_TXPOWER)))) 361 return; 362 363 if (!check_sdata_in_driver(sdata)) 364 return; 365 366 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 367 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 368 369 trace_drv_vif_cfg_changed(local, sdata, changed); 370 if (local->ops->vif_cfg_changed) 371 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 372 } 373 374 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 375 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 376 377 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 378 changed); 379 if (local->ops->link_info_changed) 380 local->ops->link_info_changed(&local->hw, &sdata->vif, 381 &sdata->vif.bss_conf, ch); 382 } 383 384 if (local->ops->bss_info_changed) 385 local->ops->bss_info_changed(&local->hw, &sdata->vif, 386 &sdata->vif.bss_conf, changed); 387 trace_drv_return_void(local); 388 } 389 390 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 391 u64 changed) 392 { 393 struct ieee80211_local *local = sdata->local; 394 395 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 396 397 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 398 return; 399 400 drv_vif_cfg_changed(local, sdata, changed); 401 } 402 403 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 404 struct ieee80211_link_data *link, 405 u64 changed) 406 { 407 struct ieee80211_local *local = sdata->local; 408 409 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 410 411 if (!changed) 412 return; 413 414 switch (sdata->vif.type) { 415 case NL80211_IFTYPE_AP_VLAN: 416 return; 417 case NL80211_IFTYPE_MONITOR: 418 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) 419 return; 420 break; 421 default: 422 break; 423 } 424 425 if (!check_sdata_in_driver(sdata)) 426 return; 427 428 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 429 } 430 431 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 432 { 433 sdata->vif.bss_conf.use_cts_prot = false; 434 sdata->vif.bss_conf.use_short_preamble = false; 435 sdata->vif.bss_conf.use_short_slot = false; 436 return BSS_CHANGED_ERP_CTS_PROT | 437 BSS_CHANGED_ERP_PREAMBLE | 438 BSS_CHANGED_ERP_SLOT; 439 } 440 441 /* context: requires softirqs disabled */ 442 void ieee80211_handle_queued_frames(struct ieee80211_local *local) 443 { 444 struct sk_buff *skb; 445 446 while ((skb = skb_dequeue(&local->skb_queue)) || 447 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 448 switch (skb->pkt_type) { 449 case IEEE80211_RX_MSG: 450 /* Clear skb->pkt_type in order to not confuse kernel 451 * netstack. */ 452 skb->pkt_type = 0; 453 ieee80211_rx(&local->hw, skb); 454 break; 455 case IEEE80211_TX_STATUS_MSG: 456 skb->pkt_type = 0; 457 ieee80211_tx_status_skb(&local->hw, skb); 458 break; 459 default: 460 WARN(1, "mac80211: Packet is of unknown type %d\n", 461 skb->pkt_type); 462 dev_kfree_skb(skb); 463 break; 464 } 465 } 466 } 467 468 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 469 { 470 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 471 472 ieee80211_handle_queued_frames(local); 473 } 474 475 static void ieee80211_restart_work(struct work_struct *work) 476 { 477 struct ieee80211_local *local = 478 container_of(work, struct ieee80211_local, restart_work); 479 struct ieee80211_sub_if_data *sdata; 480 int ret; 481 482 flush_workqueue(local->workqueue); 483 484 rtnl_lock(); 485 /* we might do interface manipulations, so need both */ 486 wiphy_lock(local->hw.wiphy); 487 wiphy_work_flush(local->hw.wiphy, NULL); 488 489 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 490 "%s called with hardware scan in progress\n", __func__); 491 492 list_for_each_entry(sdata, &local->interfaces, list) { 493 /* 494 * XXX: there may be more work for other vif types and even 495 * for station mode: a good thing would be to run most of 496 * the iface type's dependent _stop (ieee80211_mg_stop, 497 * ieee80211_ibss_stop) etc... 498 * For now, fix only the specific bug that was seen: race 499 * between csa_connection_drop_work and us. 500 */ 501 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 502 /* 503 * This worker is scheduled from the iface worker that 504 * runs on mac80211's workqueue, so we can't be 505 * scheduling this worker after the cancel right here. 506 * The exception is ieee80211_chswitch_done. 507 * Then we can have a race... 508 */ 509 wiphy_work_cancel(local->hw.wiphy, 510 &sdata->u.mgd.csa_connection_drop_work); 511 if (sdata->vif.bss_conf.csa_active) 512 ieee80211_sta_connection_lost(sdata, 513 WLAN_REASON_UNSPECIFIED, 514 false); 515 } 516 wiphy_delayed_work_flush(local->hw.wiphy, 517 &sdata->dec_tailroom_needed_wk); 518 } 519 ieee80211_scan_cancel(local); 520 521 /* make sure any new ROC will consider local->in_reconfig */ 522 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 523 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 524 525 /* wait for all packet processing to be done */ 526 synchronize_net(); 527 528 ret = ieee80211_reconfig(local); 529 wiphy_unlock(local->hw.wiphy); 530 531 if (ret) 532 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 533 534 rtnl_unlock(); 535 } 536 537 void ieee80211_restart_hw(struct ieee80211_hw *hw) 538 { 539 struct ieee80211_local *local = hw_to_local(hw); 540 541 trace_api_restart_hw(local); 542 543 wiphy_info(hw->wiphy, 544 "Hardware restart was requested\n"); 545 546 /* use this reason, ieee80211_reconfig will unblock it */ 547 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 548 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 549 false); 550 551 /* 552 * Stop all Rx during the reconfig. We don't want state changes 553 * or driver callbacks while this is in progress. 554 */ 555 local->in_reconfig = true; 556 barrier(); 557 558 queue_work(system_freezable_wq, &local->restart_work); 559 } 560 EXPORT_SYMBOL(ieee80211_restart_hw); 561 562 #ifdef CONFIG_INET 563 static int ieee80211_ifa_changed(struct notifier_block *nb, 564 unsigned long data, void *arg) 565 { 566 struct in_ifaddr *ifa = arg; 567 struct ieee80211_local *local = 568 container_of(nb, struct ieee80211_local, 569 ifa_notifier); 570 struct net_device *ndev = ifa->ifa_dev->dev; 571 struct wireless_dev *wdev = ndev->ieee80211_ptr; 572 struct in_device *idev; 573 struct ieee80211_sub_if_data *sdata; 574 struct ieee80211_vif_cfg *vif_cfg; 575 struct ieee80211_if_managed *ifmgd; 576 int c = 0; 577 578 /* Make sure it's our interface that got changed */ 579 if (!wdev) 580 return NOTIFY_DONE; 581 582 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 583 return NOTIFY_DONE; 584 585 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 586 vif_cfg = &sdata->vif.cfg; 587 588 /* ARP filtering is only supported in managed mode */ 589 if (sdata->vif.type != NL80211_IFTYPE_STATION) 590 return NOTIFY_DONE; 591 592 idev = __in_dev_get_rtnl(sdata->dev); 593 if (!idev) 594 return NOTIFY_DONE; 595 596 ifmgd = &sdata->u.mgd; 597 598 /* 599 * The nested here is needed to convince lockdep that this is 600 * all OK. Yes, we lock the wiphy mutex here while we already 601 * hold the notifier rwsem, that's the normal case. And yes, 602 * we also acquire the notifier rwsem again when unregistering 603 * a netdev while we already hold the wiphy mutex, so it does 604 * look like a typical ABBA deadlock. 605 * 606 * However, both of these things happen with the RTNL held 607 * already. Therefore, they can't actually happen, since the 608 * lock orders really are ABC and ACB, which is fine due to 609 * the RTNL (A). 610 * 611 * We still need to prevent recursion, which is accomplished 612 * by the !wdev->registered check above. 613 */ 614 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 615 __acquire(&local->hw.wiphy->mtx); 616 617 /* Copy the addresses to the vif config list */ 618 ifa = rtnl_dereference(idev->ifa_list); 619 while (ifa) { 620 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 621 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 622 ifa = rtnl_dereference(ifa->ifa_next); 623 c++; 624 } 625 626 vif_cfg->arp_addr_cnt = c; 627 628 /* Configure driver only if associated (which also implies it is up) */ 629 if (ifmgd->associated) 630 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 631 632 wiphy_unlock(local->hw.wiphy); 633 634 return NOTIFY_OK; 635 } 636 #endif 637 638 #if IS_ENABLED(CONFIG_IPV6) 639 static int ieee80211_ifa6_changed(struct notifier_block *nb, 640 unsigned long data, void *arg) 641 { 642 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 643 struct inet6_dev *idev = ifa->idev; 644 struct net_device *ndev = ifa->idev->dev; 645 struct ieee80211_local *local = 646 container_of(nb, struct ieee80211_local, ifa6_notifier); 647 struct wireless_dev *wdev = ndev->ieee80211_ptr; 648 struct ieee80211_sub_if_data *sdata; 649 650 /* Make sure it's our interface that got changed */ 651 if (!wdev || wdev->wiphy != local->hw.wiphy) 652 return NOTIFY_DONE; 653 654 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 655 656 /* 657 * For now only support station mode. This is mostly because 658 * doing AP would have to handle AP_VLAN in some way ... 659 */ 660 if (sdata->vif.type != NL80211_IFTYPE_STATION) 661 return NOTIFY_DONE; 662 663 drv_ipv6_addr_change(local, sdata, idev); 664 665 return NOTIFY_OK; 666 } 667 #endif 668 669 /* There isn't a lot of sense in it, but you can transmit anything you like */ 670 static const struct ieee80211_txrx_stypes 671 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 672 [NL80211_IFTYPE_ADHOC] = { 673 .tx = 0xffff, 674 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 675 BIT(IEEE80211_STYPE_AUTH >> 4) | 676 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 677 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 678 }, 679 [NL80211_IFTYPE_STATION] = { 680 .tx = 0xffff, 681 /* 682 * To support Pre Association Security Negotiation (PASN) while 683 * already associated to one AP, allow user space to register to 684 * Rx authentication frames, so that the user space logic would 685 * be able to receive/handle authentication frames from a 686 * different AP as part of PASN. 687 * It is expected that user space would intelligently register 688 * for Rx authentication frames, i.e., only when PASN is used 689 * and configure a match filter only for PASN authentication 690 * algorithm, as otherwise the MLME functionality of mac80211 691 * would be broken. 692 */ 693 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 694 BIT(IEEE80211_STYPE_AUTH >> 4) | 695 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 696 }, 697 [NL80211_IFTYPE_AP] = { 698 .tx = 0xffff, 699 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 700 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 701 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 702 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 703 BIT(IEEE80211_STYPE_AUTH >> 4) | 704 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 705 BIT(IEEE80211_STYPE_ACTION >> 4), 706 }, 707 [NL80211_IFTYPE_AP_VLAN] = { 708 /* copy AP */ 709 .tx = 0xffff, 710 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 711 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 712 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 713 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 714 BIT(IEEE80211_STYPE_AUTH >> 4) | 715 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 716 BIT(IEEE80211_STYPE_ACTION >> 4), 717 }, 718 [NL80211_IFTYPE_P2P_CLIENT] = { 719 .tx = 0xffff, 720 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 721 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 722 }, 723 [NL80211_IFTYPE_P2P_GO] = { 724 .tx = 0xffff, 725 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 726 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 727 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 728 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 729 BIT(IEEE80211_STYPE_AUTH >> 4) | 730 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 731 BIT(IEEE80211_STYPE_ACTION >> 4), 732 }, 733 [NL80211_IFTYPE_MESH_POINT] = { 734 .tx = 0xffff, 735 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 736 BIT(IEEE80211_STYPE_AUTH >> 4) | 737 BIT(IEEE80211_STYPE_DEAUTH >> 4), 738 }, 739 [NL80211_IFTYPE_P2P_DEVICE] = { 740 .tx = 0xffff, 741 /* 742 * To support P2P PASN pairing let user space register to rx 743 * also AUTH frames on P2P device interface. 744 */ 745 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 746 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 747 BIT(IEEE80211_STYPE_AUTH >> 4), 748 }, 749 [NL80211_IFTYPE_NAN] = { 750 .tx = 0xffff, 751 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 752 BIT(IEEE80211_STYPE_AUTH >> 4), 753 }, 754 }; 755 756 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 757 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 758 IEEE80211_HT_AMPDU_PARM_DENSITY, 759 760 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 761 IEEE80211_HT_CAP_MAX_AMSDU | 762 IEEE80211_HT_CAP_SGI_20 | 763 IEEE80211_HT_CAP_SGI_40 | 764 IEEE80211_HT_CAP_TX_STBC | 765 IEEE80211_HT_CAP_RX_STBC | 766 IEEE80211_HT_CAP_LDPC_CODING | 767 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 768 .mcs = { 769 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 770 0xff, 0xff, 0xff, 0xff, 0xff, }, 771 }, 772 }; 773 774 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 775 .vht_cap_info = 776 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 777 IEEE80211_VHT_CAP_SHORT_GI_80 | 778 IEEE80211_VHT_CAP_SHORT_GI_160 | 779 IEEE80211_VHT_CAP_RXSTBC_MASK | 780 IEEE80211_VHT_CAP_TXSTBC | 781 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 782 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 783 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 784 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 785 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 786 .supp_mcs = { 787 .rx_mcs_map = cpu_to_le16(~0), 788 .tx_mcs_map = cpu_to_le16(~0), 789 }, 790 }; 791 792 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 793 const struct ieee80211_ops *ops, 794 const char *requested_name) 795 { 796 struct ieee80211_local *local; 797 int priv_size, i; 798 struct wiphy *wiphy; 799 bool emulate_chanctx; 800 801 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 802 !ops->add_interface || !ops->remove_interface || 803 !ops->configure_filter || !ops->wake_tx_queue)) 804 return NULL; 805 806 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 807 return NULL; 808 809 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 810 (ops->link_info_changed && ops->bss_info_changed))) 811 return NULL; 812 813 /* check all or no channel context operations exist */ 814 if (ops->add_chanctx == ieee80211_emulate_add_chanctx && 815 ops->remove_chanctx == ieee80211_emulate_remove_chanctx && 816 ops->change_chanctx == ieee80211_emulate_change_chanctx) { 817 if (WARN_ON(ops->assign_vif_chanctx || 818 ops->unassign_vif_chanctx)) 819 return NULL; 820 emulate_chanctx = true; 821 } else { 822 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx || 823 ops->remove_chanctx == ieee80211_emulate_remove_chanctx || 824 ops->change_chanctx == ieee80211_emulate_change_chanctx)) 825 return NULL; 826 if (WARN_ON(!ops->add_chanctx || 827 !ops->remove_chanctx || 828 !ops->change_chanctx || 829 !ops->assign_vif_chanctx || 830 !ops->unassign_vif_chanctx)) 831 return NULL; 832 emulate_chanctx = false; 833 } 834 835 /* Ensure 32-byte alignment of our private data and hw private data. 836 * We use the wiphy priv data for both our ieee80211_local and for 837 * the driver's private data 838 * 839 * In memory it'll be like this: 840 * 841 * +-------------------------+ 842 * | struct wiphy | 843 * +-------------------------+ 844 * | struct ieee80211_local | 845 * +-------------------------+ 846 * | driver's private data | 847 * +-------------------------+ 848 * 849 */ 850 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 851 852 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 853 854 if (!wiphy) 855 return NULL; 856 857 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 858 859 wiphy->privid = mac80211_wiphy_privid; 860 861 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 862 WIPHY_FLAG_4ADDR_AP | 863 WIPHY_FLAG_4ADDR_STATION | 864 WIPHY_FLAG_REPORTS_OBSS | 865 WIPHY_FLAG_OFFCHAN_TX; 866 867 if (emulate_chanctx || ops->remain_on_channel) 868 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 869 870 wiphy->bss_param_support = WIPHY_BSS_PARAM_CTS_PROT | 871 WIPHY_BSS_PARAM_SHORT_PREAMBLE | 872 WIPHY_BSS_PARAM_SHORT_SLOT_TIME | 873 WIPHY_BSS_PARAM_BASIC_RATES | 874 WIPHY_BSS_PARAM_AP_ISOLATE | 875 WIPHY_BSS_PARAM_HT_OPMODE | 876 WIPHY_BSS_PARAM_P2P_CTWINDOW | 877 WIPHY_BSS_PARAM_P2P_OPPPS; 878 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 879 NL80211_FEATURE_SAE | 880 NL80211_FEATURE_HT_IBSS | 881 NL80211_FEATURE_VIF_TXPOWER | 882 NL80211_FEATURE_MAC_ON_CREATE | 883 NL80211_FEATURE_USERSPACE_MPM | 884 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 885 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 886 wiphy_ext_feature_set(wiphy, 887 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 888 wiphy_ext_feature_set(wiphy, 889 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 890 wiphy_ext_feature_set(wiphy, 891 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 892 wiphy_ext_feature_set(wiphy, 893 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 894 wiphy_ext_feature_set(wiphy, 895 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 896 897 if (!ops->hw_scan) { 898 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 899 NL80211_FEATURE_AP_SCAN; 900 /* 901 * if the driver behaves correctly using the probe request 902 * (template) from mac80211, then both of these should be 903 * supported even with hw scan - but let drivers opt in. 904 */ 905 wiphy_ext_feature_set(wiphy, 906 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 907 wiphy_ext_feature_set(wiphy, 908 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 909 } 910 911 if (!ops->set_key) { 912 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 913 wiphy_ext_feature_set(wiphy, 914 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT); 915 } 916 917 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 918 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 919 920 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 921 922 local = wiphy_priv(wiphy); 923 924 if (sta_info_init(local)) 925 goto err_free; 926 927 local->hw.wiphy = wiphy; 928 929 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 930 931 local->ops = ops; 932 local->emulate_chanctx = emulate_chanctx; 933 934 if (emulate_chanctx) 935 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA); 936 937 /* 938 * We need a bit of data queued to build aggregates properly, so 939 * instruct the TCP stack to allow more than a single ms of data 940 * to be queued in the stack. The value is a bit-shift of 1 941 * second, so 7 is ~8ms of queued data. Only affects local TCP 942 * sockets. 943 * This is the default, anyhow - drivers may need to override it 944 * for local reasons (longer buffers, longer completion time, or 945 * similar). 946 */ 947 local->hw.tx_sk_pacing_shift = 7; 948 949 /* set up some defaults */ 950 local->hw.queues = 1; 951 local->hw.max_rates = 1; 952 local->hw.max_report_rates = 0; 953 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 954 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 955 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 956 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 957 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 958 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 959 IEEE80211_RADIOTAP_MCS_HAVE_GI | 960 IEEE80211_RADIOTAP_MCS_HAVE_BW; 961 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 962 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 963 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 964 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 965 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 966 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 967 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 968 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 969 970 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 971 972 wiphy->extended_capabilities = local->ext_capa; 973 wiphy->extended_capabilities_mask = local->ext_capa; 974 wiphy->extended_capabilities_len = 975 ARRAY_SIZE(local->ext_capa); 976 977 INIT_LIST_HEAD(&local->interfaces); 978 INIT_LIST_HEAD(&local->mon_list); 979 980 __hw_addr_init(&local->mc_list); 981 982 mutex_init(&local->iflist_mtx); 983 spin_lock_init(&local->filter_lock); 984 spin_lock_init(&local->rx_path_lock); 985 spin_lock_init(&local->queue_stop_reason_lock); 986 987 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 988 INIT_LIST_HEAD(&local->active_txqs[i]); 989 spin_lock_init(&local->active_txq_lock[i]); 990 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 991 local->aql_txq_limit_high[i] = 992 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 993 atomic_set(&local->aql_ac_pending_airtime[i], 0); 994 } 995 996 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 997 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 998 atomic_set(&local->aql_total_pending_airtime, 0); 999 1000 spin_lock_init(&local->handle_wake_tx_queue_lock); 1001 1002 INIT_LIST_HEAD(&local->chanctx_list); 1003 1004 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 1005 1006 INIT_WORK(&local->restart_work, ieee80211_restart_work); 1007 1008 wiphy_work_init(&local->radar_detected_work, 1009 ieee80211_dfs_radar_detected_work); 1010 1011 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 1012 1013 wiphy_work_init(&local->dynamic_ps_enable_work, 1014 ieee80211_dynamic_ps_enable_work); 1015 wiphy_work_init(&local->dynamic_ps_disable_work, 1016 ieee80211_dynamic_ps_disable_work); 1017 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 1018 1019 wiphy_work_init(&local->sched_scan_stopped_work, 1020 ieee80211_sched_scan_stopped_work); 1021 1022 spin_lock_init(&local->ack_status_lock); 1023 idr_init(&local->ack_status_frames); 1024 1025 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1026 skb_queue_head_init(&local->pending[i]); 1027 atomic_set(&local->agg_queue_stop[i], 0); 1028 } 1029 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 1030 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 1031 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 1032 1033 skb_queue_head_init(&local->skb_queue); 1034 skb_queue_head_init(&local->skb_queue_unreliable); 1035 1036 ieee80211_alloc_led_names(local); 1037 1038 ieee80211_roc_setup(local); 1039 1040 local->hw.radiotap_timestamp.units_pos = -1; 1041 local->hw.radiotap_timestamp.accuracy = -1; 1042 1043 return &local->hw; 1044 err_free: 1045 wiphy_free(wiphy); 1046 return NULL; 1047 } 1048 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 1049 1050 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 1051 { 1052 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 1053 static const u32 cipher_suites[] = { 1054 /* keep WEP and TKIP first, they may be removed below */ 1055 WLAN_CIPHER_SUITE_WEP40, 1056 WLAN_CIPHER_SUITE_WEP104, 1057 WLAN_CIPHER_SUITE_TKIP, 1058 WLAN_CIPHER_SUITE_CCMP, 1059 WLAN_CIPHER_SUITE_CCMP_256, 1060 WLAN_CIPHER_SUITE_GCMP, 1061 WLAN_CIPHER_SUITE_GCMP_256, 1062 1063 /* keep last -- depends on hw flags! */ 1064 WLAN_CIPHER_SUITE_AES_CMAC, 1065 WLAN_CIPHER_SUITE_BIP_CMAC_256, 1066 WLAN_CIPHER_SUITE_BIP_GMAC_128, 1067 WLAN_CIPHER_SUITE_BIP_GMAC_256, 1068 }; 1069 1070 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) && fips_enabled) { 1071 dev_err(local->hw.wiphy->dev.parent, 1072 "Drivers with SW_CRYPTO_CONTROL cannot work with FIPS\n"); 1073 return -EINVAL; 1074 } 1075 1076 if (WARN_ON(ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) && 1077 !local->hw.wiphy->cipher_suites)) 1078 return -EINVAL; 1079 1080 if (fips_enabled || !local->hw.wiphy->cipher_suites) { 1081 /* assign the (software supported and perhaps offloaded) 1082 * cipher suites 1083 */ 1084 local->hw.wiphy->cipher_suites = cipher_suites; 1085 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 1086 1087 if (!have_mfp) 1088 local->hw.wiphy->n_cipher_suites -= 4; 1089 1090 /* FIPS does not permit the use of RC4 */ 1091 if (fips_enabled) { 1092 local->hw.wiphy->cipher_suites += 3; 1093 local->hw.wiphy->n_cipher_suites -= 3; 1094 } 1095 } 1096 1097 return 0; 1098 } 1099 1100 static bool 1101 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb) 1102 { 1103 int i, j; 1104 1105 for (i = 0; i < n_comb; i++, c++) { 1106 /* DFS is not supported with multi-channel combinations yet */ 1107 if (c->radar_detect_widths && 1108 c->num_different_channels > 1) 1109 return false; 1110 1111 /* mac80211 doesn't support more than one IBSS interface */ 1112 for (j = 0; j < c->n_limits; j++) 1113 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1114 c->limits[j].max > 1) 1115 return false; 1116 } 1117 1118 return true; 1119 } 1120 1121 int ieee80211_register_hw(struct ieee80211_hw *hw) 1122 { 1123 struct ieee80211_local *local = hw_to_local(hw); 1124 int result, i; 1125 enum nl80211_band band; 1126 int channels, max_bitrates; 1127 bool supp_ht, supp_vht, supp_he, supp_eht, supp_s1g; 1128 struct cfg80211_chan_def dflt_chandef = {}; 1129 1130 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 1131 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 1132 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 1133 return -EINVAL; 1134 1135 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 1136 (!local->ops->tdls_channel_switch || 1137 !local->ops->tdls_cancel_channel_switch || 1138 !local->ops->tdls_recv_channel_switch)) 1139 return -EOPNOTSUPP; 1140 1141 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 1142 !local->ops->set_frag_threshold)) 1143 return -EINVAL; 1144 1145 if (WARN_ON(local->hw.wiphy->interface_modes & 1146 BIT(NL80211_IFTYPE_NAN) && 1147 (!local->ops->start_nan || !local->ops->stop_nan))) 1148 return -EINVAL; 1149 1150 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 1151 /* 1152 * For drivers capable of doing MLO, assume modern driver 1153 * or firmware facilities, so software doesn't have to do 1154 * as much, e.g. monitoring beacons would be hard if we 1155 * might not even know which link is active at which time. 1156 */ 1157 if (WARN_ON(local->emulate_chanctx)) 1158 return -EINVAL; 1159 1160 if (WARN_ON(!local->ops->link_info_changed)) 1161 return -EINVAL; 1162 1163 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 1164 return -EINVAL; 1165 1166 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 1167 return -EINVAL; 1168 1169 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 1170 return -EINVAL; 1171 1172 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 1173 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1174 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1175 return -EINVAL; 1176 1177 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1178 return -EINVAL; 1179 1180 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1181 return -EINVAL; 1182 1183 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1184 return -EINVAL; 1185 1186 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1187 return -EINVAL; 1188 } 1189 1190 #ifdef CONFIG_PM 1191 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1192 return -EINVAL; 1193 #endif 1194 1195 if (local->emulate_chanctx) { 1196 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1197 const struct ieee80211_iface_combination *comb; 1198 1199 comb = &local->hw.wiphy->iface_combinations[i]; 1200 1201 if (comb->num_different_channels > 1) 1202 return -EINVAL; 1203 } 1204 } 1205 1206 if (hw->wiphy->n_radio) { 1207 for (i = 0; i < hw->wiphy->n_radio; i++) { 1208 const struct wiphy_radio *radio = &hw->wiphy->radio[i]; 1209 1210 if (!ieee80211_ifcomb_check(radio->iface_combinations, 1211 radio->n_iface_combinations)) 1212 return -EINVAL; 1213 } 1214 } else { 1215 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations, 1216 hw->wiphy->n_iface_combinations)) 1217 return -EINVAL; 1218 } 1219 1220 /* Only HW csum features are currently compatible with mac80211 */ 1221 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1222 return -EINVAL; 1223 1224 if (hw->max_report_rates == 0) 1225 hw->max_report_rates = hw->max_rates; 1226 1227 local->rx_chains = 1; 1228 1229 /* 1230 * generic code guarantees at least one band, 1231 * set this very early because much code assumes 1232 * that hw.conf.channel is assigned 1233 */ 1234 channels = 0; 1235 max_bitrates = 0; 1236 supp_ht = false; 1237 supp_vht = false; 1238 supp_he = false; 1239 supp_eht = false; 1240 supp_s1g = false; 1241 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1242 const struct ieee80211_sband_iftype_data *iftd; 1243 struct ieee80211_supported_band *sband; 1244 1245 sband = local->hw.wiphy->bands[band]; 1246 if (!sband) 1247 continue; 1248 1249 if (!dflt_chandef.chan) { 1250 /* 1251 * Assign the first enabled channel to dflt_chandef 1252 * from the list of channels. For S1G interfaces 1253 * ensure it can be used as a primary. 1254 */ 1255 for (i = 0; i < sband->n_channels; i++) 1256 if (!(sband->channels[i].flags & 1257 (IEEE80211_CHAN_DISABLED | 1258 IEEE80211_CHAN_S1G_NO_PRIMARY))) 1259 break; 1260 /* if none found then use the first anyway */ 1261 if (i == sband->n_channels) 1262 i = 0; 1263 cfg80211_chandef_create(&dflt_chandef, 1264 &sband->channels[i], 1265 NL80211_CHAN_NO_HT); 1266 /* init channel we're on */ 1267 local->monitor_chanreq.oper = dflt_chandef; 1268 if (local->emulate_chanctx) { 1269 local->dflt_chandef = dflt_chandef; 1270 local->hw.conf.chandef = dflt_chandef; 1271 } 1272 } 1273 1274 channels += sband->n_channels; 1275 1276 /* 1277 * Due to the way the aggregation code handles this and it 1278 * being an HT capability, we can't really support delayed 1279 * BA in MLO (yet). 1280 */ 1281 if (WARN_ON(sband->ht_cap.ht_supported && 1282 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1283 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1284 return -EINVAL; 1285 1286 if (max_bitrates < sband->n_bitrates) 1287 max_bitrates = sband->n_bitrates; 1288 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1289 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1290 supp_s1g = supp_s1g || sband->s1g_cap.s1g; 1291 1292 for_each_sband_iftype_data(sband, i, iftd) { 1293 u8 he_40_mhz_cap; 1294 1295 supp_he = supp_he || iftd->he_cap.has_he; 1296 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1297 1298 if (band == NL80211_BAND_2GHZ) 1299 he_40_mhz_cap = 1300 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 1301 else 1302 he_40_mhz_cap = 1303 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; 1304 1305 /* currently no support for HE client where HT has 40 MHz but not HT */ 1306 if (iftd->he_cap.has_he && 1307 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | 1308 BIT(NL80211_IFTYPE_P2P_CLIENT)) && 1309 sband->ht_cap.ht_supported && 1310 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 1311 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) 1312 return -EINVAL; 1313 1314 /* no support for per-band vendor elems with MLO */ 1315 if (WARN_ON(iftd->vendor_elems.len && 1316 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1317 return -EINVAL; 1318 } 1319 1320 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1321 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1322 (supp_ht || supp_vht || supp_he))) 1323 return -EINVAL; 1324 1325 /* EHT requires HE support */ 1326 if (WARN_ON(supp_eht && !supp_he)) 1327 return -EINVAL; 1328 1329 if (!sband->ht_cap.ht_supported) 1330 continue; 1331 1332 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1333 local->rx_chains = 1334 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1335 local->rx_chains); 1336 1337 /* no need to mask, SM_PS_DISABLED has all bits set */ 1338 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1339 IEEE80211_HT_CAP_SM_PS_SHIFT; 1340 } 1341 1342 /* if low-level driver supports AP, we also support VLAN. 1343 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1344 * based on their support to transmit SW encrypted packets. 1345 */ 1346 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1347 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1348 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1349 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1350 } 1351 1352 /* mac80211 always supports monitor */ 1353 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1354 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1355 1356 1357 local->int_scan_req = kzalloc(struct_size(local->int_scan_req, 1358 channels, channels), 1359 GFP_KERNEL); 1360 if (!local->int_scan_req) 1361 return -ENOMEM; 1362 1363 eth_broadcast_addr(local->int_scan_req->bssid); 1364 1365 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1366 if (!local->hw.wiphy->bands[band]) 1367 continue; 1368 local->int_scan_req->rates[band] = (u32) -1; 1369 } 1370 1371 #ifndef CONFIG_MAC80211_MESH 1372 /* mesh depends on Kconfig, but drivers should set it if they want */ 1373 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1374 #endif 1375 1376 /* if the underlying driver supports mesh, mac80211 will (at least) 1377 * provide routing of mesh authentication frames to userspace */ 1378 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1379 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1380 1381 /* mac80211 supports control port protocol changing */ 1382 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1383 1384 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1385 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1386 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1387 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1388 if (hw->max_signal <= 0) { 1389 result = -EINVAL; 1390 goto fail_workqueue; 1391 } 1392 } 1393 1394 /* Mac80211 and therefore all drivers using SW crypto only 1395 * are able to handle PTK rekeys and Extended Key ID. 1396 */ 1397 if (!local->ops->set_key) { 1398 wiphy_ext_feature_set(local->hw.wiphy, 1399 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1400 wiphy_ext_feature_set(local->hw.wiphy, 1401 NL80211_EXT_FEATURE_EXT_KEY_ID); 1402 } 1403 1404 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1405 wiphy_ext_feature_set(local->hw.wiphy, 1406 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1407 1408 /* 1409 * Calculate scan IE length -- we need this to alloc 1410 * memory and to subtract from the driver limit. It 1411 * includes the DS Params, (extended) supported rates, and HT 1412 * information -- SSID is the driver's responsibility. 1413 */ 1414 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1415 3 /* DS Params */; 1416 if (supp_ht) 1417 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1418 1419 if (supp_vht) 1420 local->scan_ies_len += 1421 2 + sizeof(struct ieee80211_vht_cap); 1422 1423 if (supp_s1g) 1424 local->scan_ies_len += 2 + sizeof(struct ieee80211_s1g_cap); 1425 1426 /* 1427 * HE cap element is variable in size - set len to allow max size */ 1428 if (supp_he) { 1429 local->scan_ies_len += 1430 3 + sizeof(struct ieee80211_he_cap_elem) + 1431 sizeof(struct ieee80211_he_mcs_nss_supp) + 1432 IEEE80211_HE_PPE_THRES_MAX_LEN; 1433 1434 if (supp_eht) 1435 local->scan_ies_len += 1436 3 + sizeof(struct ieee80211_eht_cap_elem) + 1437 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1438 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1439 } 1440 1441 if (!local->ops->hw_scan) { 1442 /* For hw_scan, driver needs to set these up. */ 1443 local->hw.wiphy->max_scan_ssids = 4; 1444 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1445 } 1446 1447 /* 1448 * If the driver supports any scan IEs, then assume the 1449 * limit includes the IEs mac80211 will add, otherwise 1450 * leave it at zero and let the driver sort it out; we 1451 * still pass our IEs to the driver but userspace will 1452 * not be allowed to in that case. 1453 */ 1454 if (local->hw.wiphy->max_scan_ie_len) 1455 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1456 1457 result = ieee80211_init_cipher_suites(local); 1458 if (result < 0) 1459 goto fail_workqueue; 1460 1461 if (!local->ops->remain_on_channel) 1462 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1463 1464 /* mac80211 based drivers don't support internal TDLS setup */ 1465 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1466 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1467 1468 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1469 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1470 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1471 1472 /* mac80211 supports multi BSSID, if the driver supports it */ 1473 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1474 local->hw.wiphy->support_mbssid = true; 1475 if (ieee80211_hw_check(&local->hw, 1476 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1477 local->hw.wiphy->support_only_he_mbssid = true; 1478 else 1479 local->ext_capa[2] |= 1480 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1481 } 1482 1483 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1484 1485 /* 1486 * We use the number of queues for feature tests (QoS, HT) internally 1487 * so restrict them appropriately. 1488 */ 1489 if (hw->queues > IEEE80211_MAX_QUEUES) 1490 hw->queues = IEEE80211_MAX_QUEUES; 1491 1492 local->workqueue = 1493 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1494 if (!local->workqueue) { 1495 result = -ENOMEM; 1496 goto fail_workqueue; 1497 } 1498 1499 /* 1500 * The hardware needs headroom for sending the frame, 1501 * and we need some headroom for passing the frame to monitor 1502 * interfaces, but never both at the same time. 1503 */ 1504 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1505 IEEE80211_TX_STATUS_HEADROOM); 1506 1507 /* 1508 * if the driver doesn't specify a max listen interval we 1509 * use 5 which should be a safe default 1510 */ 1511 if (local->hw.max_listen_interval == 0) 1512 local->hw.max_listen_interval = 5; 1513 1514 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1515 1516 local->dynamic_ps_forced_timeout = -1; 1517 1518 if (!local->hw.max_nan_de_entries) 1519 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1520 1521 if (!local->hw.weight_multiplier) 1522 local->hw.weight_multiplier = 1; 1523 1524 ieee80211_wep_init(local); 1525 1526 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1527 1528 ieee80211_led_init(local); 1529 1530 result = ieee80211_txq_setup_flows(local); 1531 if (result) 1532 goto fail_flows; 1533 1534 rtnl_lock(); 1535 result = ieee80211_init_rate_ctrl_alg(local, 1536 hw->rate_control_algorithm); 1537 rtnl_unlock(); 1538 if (result < 0) { 1539 wiphy_debug(local->hw.wiphy, 1540 "Failed to initialize rate control algorithm\n"); 1541 goto fail_rate; 1542 } 1543 1544 if (local->rate_ctrl) { 1545 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1546 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1547 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1548 } 1549 1550 /* 1551 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1552 * or have it when we don't, copy the sband structure and set/clear it. 1553 * This is necessary because rate scaling algorithms could be switched 1554 * and have different support values. 1555 * Print a message so that in the common case the reallocation can be 1556 * avoided. 1557 */ 1558 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1559 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1560 struct ieee80211_supported_band *sband; 1561 bool local_cap, ie_cap; 1562 1563 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1564 1565 sband = local->hw.wiphy->bands[band]; 1566 if (!sband || !sband->vht_cap.vht_supported) 1567 continue; 1568 1569 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1570 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1571 1572 if (local_cap == ie_cap) 1573 continue; 1574 1575 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1576 if (!sband) { 1577 result = -ENOMEM; 1578 goto fail_rate; 1579 } 1580 1581 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1582 band); 1583 1584 sband->vht_cap.vht_mcs.tx_highest ^= 1585 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1586 1587 local->hw.wiphy->bands[band] = sband; 1588 local->sband_allocated |= BIT(band); 1589 } 1590 1591 result = wiphy_register(local->hw.wiphy); 1592 if (result < 0) 1593 goto fail_wiphy_register; 1594 1595 debugfs_hw_add(local); 1596 rate_control_add_debugfs(local); 1597 1598 ieee80211_check_wbrf_support(local); 1599 1600 rtnl_lock(); 1601 wiphy_lock(hw->wiphy); 1602 1603 /* add one default STA interface if supported */ 1604 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1605 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1606 struct vif_params params = {0}; 1607 1608 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1609 NL80211_IFTYPE_STATION, ¶ms); 1610 if (result) 1611 wiphy_warn(local->hw.wiphy, 1612 "Failed to add default virtual iface\n"); 1613 } 1614 1615 wiphy_unlock(hw->wiphy); 1616 rtnl_unlock(); 1617 1618 #ifdef CONFIG_INET 1619 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1620 result = register_inetaddr_notifier(&local->ifa_notifier); 1621 if (result) 1622 goto fail_ifa; 1623 #endif 1624 1625 #if IS_ENABLED(CONFIG_IPV6) 1626 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1627 result = register_inet6addr_notifier(&local->ifa6_notifier); 1628 if (result) 1629 goto fail_ifa6; 1630 #endif 1631 1632 return 0; 1633 1634 #if IS_ENABLED(CONFIG_IPV6) 1635 fail_ifa6: 1636 #ifdef CONFIG_INET 1637 unregister_inetaddr_notifier(&local->ifa_notifier); 1638 #endif 1639 #endif 1640 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1641 fail_ifa: 1642 #endif 1643 wiphy_unregister(local->hw.wiphy); 1644 fail_wiphy_register: 1645 rtnl_lock(); 1646 rate_control_deinitialize(local); 1647 ieee80211_remove_interfaces(local); 1648 rtnl_unlock(); 1649 fail_rate: 1650 ieee80211_txq_teardown_flows(local); 1651 fail_flows: 1652 ieee80211_led_exit(local); 1653 destroy_workqueue(local->workqueue); 1654 fail_workqueue: 1655 kfree(local->int_scan_req); 1656 return result; 1657 } 1658 EXPORT_SYMBOL(ieee80211_register_hw); 1659 1660 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1661 { 1662 struct ieee80211_local *local = hw_to_local(hw); 1663 1664 tasklet_kill(&local->tx_pending_tasklet); 1665 tasklet_kill(&local->tasklet); 1666 1667 #ifdef CONFIG_INET 1668 unregister_inetaddr_notifier(&local->ifa_notifier); 1669 #endif 1670 #if IS_ENABLED(CONFIG_IPV6) 1671 unregister_inet6addr_notifier(&local->ifa6_notifier); 1672 #endif 1673 1674 rtnl_lock(); 1675 1676 /* 1677 * At this point, interface list manipulations are fine 1678 * because the driver cannot be handing us frames any 1679 * more and the tasklet is killed. 1680 */ 1681 ieee80211_remove_interfaces(local); 1682 1683 ieee80211_txq_teardown_flows(local); 1684 1685 wiphy_lock(local->hw.wiphy); 1686 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1687 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1688 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1689 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1690 wiphy_unlock(local->hw.wiphy); 1691 rtnl_unlock(); 1692 1693 cancel_work_sync(&local->restart_work); 1694 1695 ieee80211_clear_tx_pending(local); 1696 rate_control_deinitialize(local); 1697 1698 if (skb_queue_len(&local->skb_queue) || 1699 skb_queue_len(&local->skb_queue_unreliable)) 1700 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1701 skb_queue_purge(&local->skb_queue); 1702 skb_queue_purge(&local->skb_queue_unreliable); 1703 1704 wiphy_unregister(local->hw.wiphy); 1705 destroy_workqueue(local->workqueue); 1706 ieee80211_led_exit(local); 1707 kfree(local->int_scan_req); 1708 } 1709 EXPORT_SYMBOL(ieee80211_unregister_hw); 1710 1711 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1712 { 1713 WARN_ONCE(1, "Have pending ack frames!\n"); 1714 kfree_skb(p); 1715 return 0; 1716 } 1717 1718 void ieee80211_free_hw(struct ieee80211_hw *hw) 1719 { 1720 struct ieee80211_local *local = hw_to_local(hw); 1721 enum nl80211_band band; 1722 1723 mutex_destroy(&local->iflist_mtx); 1724 1725 idr_for_each(&local->ack_status_frames, 1726 ieee80211_free_ack_frame, NULL); 1727 idr_destroy(&local->ack_status_frames); 1728 1729 sta_info_stop(local); 1730 1731 ieee80211_free_led_names(local); 1732 1733 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1734 if (!(local->sband_allocated & BIT(band))) 1735 continue; 1736 kfree(local->hw.wiphy->bands[band]); 1737 } 1738 1739 wiphy_free(local->hw.wiphy); 1740 } 1741 EXPORT_SYMBOL(ieee80211_free_hw); 1742 #define V(x) #x, 1743 static const char * const drop_reasons_unusable[] = { 1744 [0] = "RX_DROP_UNUSABLE", 1745 MAC80211_DROP_REASONS_UNUSABLE(V) 1746 #undef V 1747 }; 1748 1749 static struct drop_reason_list drop_reason_list_unusable = { 1750 .reasons = drop_reasons_unusable, 1751 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1752 }; 1753 1754 static int __init ieee80211_init(void) 1755 { 1756 struct sk_buff *skb; 1757 int ret; 1758 1759 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1760 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1761 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1762 1763 ret = rc80211_minstrel_init(); 1764 if (ret) 1765 return ret; 1766 1767 ret = ieee80211_iface_init(); 1768 if (ret) 1769 goto err_netdev; 1770 1771 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1772 &drop_reason_list_unusable); 1773 1774 return 0; 1775 err_netdev: 1776 rc80211_minstrel_exit(); 1777 1778 return ret; 1779 } 1780 1781 static void __exit ieee80211_exit(void) 1782 { 1783 rc80211_minstrel_exit(); 1784 1785 ieee80211s_stop(); 1786 1787 ieee80211_iface_exit(); 1788 1789 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1790 1791 rcu_barrier(); 1792 } 1793 1794 1795 subsys_initcall(ieee80211_init); 1796 module_exit(ieee80211_exit); 1797 1798 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1799 MODULE_LICENSE("GPL"); 1800