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) 2018-2024 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 || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 412 return; 413 414 if (!check_sdata_in_driver(sdata)) 415 return; 416 417 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 418 } 419 420 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 421 { 422 sdata->vif.bss_conf.use_cts_prot = false; 423 sdata->vif.bss_conf.use_short_preamble = false; 424 sdata->vif.bss_conf.use_short_slot = false; 425 return BSS_CHANGED_ERP_CTS_PROT | 426 BSS_CHANGED_ERP_PREAMBLE | 427 BSS_CHANGED_ERP_SLOT; 428 } 429 430 /* context: requires softirqs disabled */ 431 void ieee80211_handle_queued_frames(struct ieee80211_local *local) 432 { 433 struct sk_buff *skb; 434 435 while ((skb = skb_dequeue(&local->skb_queue)) || 436 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 437 switch (skb->pkt_type) { 438 case IEEE80211_RX_MSG: 439 /* Clear skb->pkt_type in order to not confuse kernel 440 * netstack. */ 441 skb->pkt_type = 0; 442 ieee80211_rx(&local->hw, skb); 443 break; 444 case IEEE80211_TX_STATUS_MSG: 445 skb->pkt_type = 0; 446 ieee80211_tx_status_skb(&local->hw, skb); 447 break; 448 default: 449 WARN(1, "mac80211: Packet is of unknown type %d\n", 450 skb->pkt_type); 451 dev_kfree_skb(skb); 452 break; 453 } 454 } 455 } 456 457 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 458 { 459 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 460 461 ieee80211_handle_queued_frames(local); 462 } 463 464 static void ieee80211_restart_work(struct work_struct *work) 465 { 466 struct ieee80211_local *local = 467 container_of(work, struct ieee80211_local, restart_work); 468 struct ieee80211_sub_if_data *sdata; 469 int ret; 470 471 flush_workqueue(local->workqueue); 472 473 rtnl_lock(); 474 /* we might do interface manipulations, so need both */ 475 wiphy_lock(local->hw.wiphy); 476 wiphy_work_flush(local->hw.wiphy, NULL); 477 478 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 479 "%s called with hardware scan in progress\n", __func__); 480 481 list_for_each_entry(sdata, &local->interfaces, list) { 482 /* 483 * XXX: there may be more work for other vif types and even 484 * for station mode: a good thing would be to run most of 485 * the iface type's dependent _stop (ieee80211_mg_stop, 486 * ieee80211_ibss_stop) etc... 487 * For now, fix only the specific bug that was seen: race 488 * between csa_connection_drop_work and us. 489 */ 490 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 491 /* 492 * This worker is scheduled from the iface worker that 493 * runs on mac80211's workqueue, so we can't be 494 * scheduling this worker after the cancel right here. 495 * The exception is ieee80211_chswitch_done. 496 * Then we can have a race... 497 */ 498 wiphy_work_cancel(local->hw.wiphy, 499 &sdata->u.mgd.csa_connection_drop_work); 500 if (sdata->vif.bss_conf.csa_active) 501 ieee80211_sta_connection_lost(sdata, 502 WLAN_REASON_UNSPECIFIED, 503 false); 504 } 505 wiphy_delayed_work_flush(local->hw.wiphy, 506 &sdata->dec_tailroom_needed_wk); 507 } 508 ieee80211_scan_cancel(local); 509 510 /* make sure any new ROC will consider local->in_reconfig */ 511 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 512 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 513 514 /* wait for all packet processing to be done */ 515 synchronize_net(); 516 517 ret = ieee80211_reconfig(local); 518 wiphy_unlock(local->hw.wiphy); 519 520 if (ret) 521 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 522 523 rtnl_unlock(); 524 } 525 526 void ieee80211_restart_hw(struct ieee80211_hw *hw) 527 { 528 struct ieee80211_local *local = hw_to_local(hw); 529 530 trace_api_restart_hw(local); 531 532 wiphy_info(hw->wiphy, 533 "Hardware restart was requested\n"); 534 535 /* use this reason, ieee80211_reconfig will unblock it */ 536 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 537 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 538 false); 539 540 /* 541 * Stop all Rx during the reconfig. We don't want state changes 542 * or driver callbacks while this is in progress. 543 */ 544 local->in_reconfig = true; 545 barrier(); 546 547 queue_work(system_freezable_wq, &local->restart_work); 548 } 549 EXPORT_SYMBOL(ieee80211_restart_hw); 550 551 #ifdef CONFIG_INET 552 static int ieee80211_ifa_changed(struct notifier_block *nb, 553 unsigned long data, void *arg) 554 { 555 struct in_ifaddr *ifa = arg; 556 struct ieee80211_local *local = 557 container_of(nb, struct ieee80211_local, 558 ifa_notifier); 559 struct net_device *ndev = ifa->ifa_dev->dev; 560 struct wireless_dev *wdev = ndev->ieee80211_ptr; 561 struct in_device *idev; 562 struct ieee80211_sub_if_data *sdata; 563 struct ieee80211_vif_cfg *vif_cfg; 564 struct ieee80211_if_managed *ifmgd; 565 int c = 0; 566 567 /* Make sure it's our interface that got changed */ 568 if (!wdev) 569 return NOTIFY_DONE; 570 571 if (wdev->wiphy != local->hw.wiphy || !wdev->registered) 572 return NOTIFY_DONE; 573 574 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 575 vif_cfg = &sdata->vif.cfg; 576 577 /* ARP filtering is only supported in managed mode */ 578 if (sdata->vif.type != NL80211_IFTYPE_STATION) 579 return NOTIFY_DONE; 580 581 idev = __in_dev_get_rtnl(sdata->dev); 582 if (!idev) 583 return NOTIFY_DONE; 584 585 ifmgd = &sdata->u.mgd; 586 587 /* 588 * The nested here is needed to convince lockdep that this is 589 * all OK. Yes, we lock the wiphy mutex here while we already 590 * hold the notifier rwsem, that's the normal case. And yes, 591 * we also acquire the notifier rwsem again when unregistering 592 * a netdev while we already hold the wiphy mutex, so it does 593 * look like a typical ABBA deadlock. 594 * 595 * However, both of these things happen with the RTNL held 596 * already. Therefore, they can't actually happen, since the 597 * lock orders really are ABC and ACB, which is fine due to 598 * the RTNL (A). 599 * 600 * We still need to prevent recursion, which is accomplished 601 * by the !wdev->registered check above. 602 */ 603 mutex_lock_nested(&local->hw.wiphy->mtx, 1); 604 __acquire(&local->hw.wiphy->mtx); 605 606 /* Copy the addresses to the vif config list */ 607 ifa = rtnl_dereference(idev->ifa_list); 608 while (ifa) { 609 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 610 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 611 ifa = rtnl_dereference(ifa->ifa_next); 612 c++; 613 } 614 615 vif_cfg->arp_addr_cnt = c; 616 617 /* Configure driver only if associated (which also implies it is up) */ 618 if (ifmgd->associated) 619 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 620 621 wiphy_unlock(local->hw.wiphy); 622 623 return NOTIFY_OK; 624 } 625 #endif 626 627 #if IS_ENABLED(CONFIG_IPV6) 628 static int ieee80211_ifa6_changed(struct notifier_block *nb, 629 unsigned long data, void *arg) 630 { 631 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 632 struct inet6_dev *idev = ifa->idev; 633 struct net_device *ndev = ifa->idev->dev; 634 struct ieee80211_local *local = 635 container_of(nb, struct ieee80211_local, ifa6_notifier); 636 struct wireless_dev *wdev = ndev->ieee80211_ptr; 637 struct ieee80211_sub_if_data *sdata; 638 639 /* Make sure it's our interface that got changed */ 640 if (!wdev || wdev->wiphy != local->hw.wiphy) 641 return NOTIFY_DONE; 642 643 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 644 645 /* 646 * For now only support station mode. This is mostly because 647 * doing AP would have to handle AP_VLAN in some way ... 648 */ 649 if (sdata->vif.type != NL80211_IFTYPE_STATION) 650 return NOTIFY_DONE; 651 652 drv_ipv6_addr_change(local, sdata, idev); 653 654 return NOTIFY_OK; 655 } 656 #endif 657 658 /* There isn't a lot of sense in it, but you can transmit anything you like */ 659 static const struct ieee80211_txrx_stypes 660 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 661 [NL80211_IFTYPE_ADHOC] = { 662 .tx = 0xffff, 663 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 664 BIT(IEEE80211_STYPE_AUTH >> 4) | 665 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 666 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 667 }, 668 [NL80211_IFTYPE_STATION] = { 669 .tx = 0xffff, 670 /* 671 * To support Pre Association Security Negotiation (PASN) while 672 * already associated to one AP, allow user space to register to 673 * Rx authentication frames, so that the user space logic would 674 * be able to receive/handle authentication frames from a 675 * different AP as part of PASN. 676 * It is expected that user space would intelligently register 677 * for Rx authentication frames, i.e., only when PASN is used 678 * and configure a match filter only for PASN authentication 679 * algorithm, as otherwise the MLME functionality of mac80211 680 * would be broken. 681 */ 682 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 683 BIT(IEEE80211_STYPE_AUTH >> 4) | 684 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 685 }, 686 [NL80211_IFTYPE_AP] = { 687 .tx = 0xffff, 688 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 689 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 690 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 691 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 692 BIT(IEEE80211_STYPE_AUTH >> 4) | 693 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 694 BIT(IEEE80211_STYPE_ACTION >> 4), 695 }, 696 [NL80211_IFTYPE_AP_VLAN] = { 697 /* copy 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_P2P_CLIENT] = { 708 .tx = 0xffff, 709 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 710 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 711 }, 712 [NL80211_IFTYPE_P2P_GO] = { 713 .tx = 0xffff, 714 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 715 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 716 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 717 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 718 BIT(IEEE80211_STYPE_AUTH >> 4) | 719 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 720 BIT(IEEE80211_STYPE_ACTION >> 4), 721 }, 722 [NL80211_IFTYPE_MESH_POINT] = { 723 .tx = 0xffff, 724 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 725 BIT(IEEE80211_STYPE_AUTH >> 4) | 726 BIT(IEEE80211_STYPE_DEAUTH >> 4), 727 }, 728 [NL80211_IFTYPE_P2P_DEVICE] = { 729 .tx = 0xffff, 730 /* 731 * To support P2P PASN pairing let user space register to rx 732 * also AUTH frames on P2P device interface. 733 */ 734 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 735 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 736 BIT(IEEE80211_STYPE_AUTH >> 4), 737 }, 738 }; 739 740 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 741 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 742 IEEE80211_HT_AMPDU_PARM_DENSITY, 743 744 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 745 IEEE80211_HT_CAP_MAX_AMSDU | 746 IEEE80211_HT_CAP_SGI_20 | 747 IEEE80211_HT_CAP_SGI_40 | 748 IEEE80211_HT_CAP_TX_STBC | 749 IEEE80211_HT_CAP_RX_STBC | 750 IEEE80211_HT_CAP_LDPC_CODING | 751 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 752 .mcs = { 753 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 754 0xff, 0xff, 0xff, 0xff, 0xff, }, 755 }, 756 }; 757 758 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 759 .vht_cap_info = 760 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 761 IEEE80211_VHT_CAP_SHORT_GI_80 | 762 IEEE80211_VHT_CAP_SHORT_GI_160 | 763 IEEE80211_VHT_CAP_RXSTBC_MASK | 764 IEEE80211_VHT_CAP_TXSTBC | 765 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 766 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 767 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 768 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 769 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 770 .supp_mcs = { 771 .rx_mcs_map = cpu_to_le16(~0), 772 .tx_mcs_map = cpu_to_le16(~0), 773 }, 774 }; 775 776 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 777 const struct ieee80211_ops *ops, 778 const char *requested_name) 779 { 780 struct ieee80211_local *local; 781 int priv_size, i; 782 struct wiphy *wiphy; 783 bool emulate_chanctx; 784 785 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 786 !ops->add_interface || !ops->remove_interface || 787 !ops->configure_filter || !ops->wake_tx_queue)) 788 return NULL; 789 790 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 791 return NULL; 792 793 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 794 (ops->link_info_changed && ops->bss_info_changed))) 795 return NULL; 796 797 /* check all or no channel context operations exist */ 798 if (ops->add_chanctx == ieee80211_emulate_add_chanctx && 799 ops->remove_chanctx == ieee80211_emulate_remove_chanctx && 800 ops->change_chanctx == ieee80211_emulate_change_chanctx) { 801 if (WARN_ON(ops->assign_vif_chanctx || 802 ops->unassign_vif_chanctx)) 803 return NULL; 804 emulate_chanctx = true; 805 } else { 806 if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx || 807 ops->remove_chanctx == ieee80211_emulate_remove_chanctx || 808 ops->change_chanctx == ieee80211_emulate_change_chanctx)) 809 return NULL; 810 if (WARN_ON(!ops->add_chanctx || 811 !ops->remove_chanctx || 812 !ops->change_chanctx || 813 !ops->assign_vif_chanctx || 814 !ops->unassign_vif_chanctx)) 815 return NULL; 816 emulate_chanctx = false; 817 } 818 819 /* Ensure 32-byte alignment of our private data and hw private data. 820 * We use the wiphy priv data for both our ieee80211_local and for 821 * the driver's private data 822 * 823 * In memory it'll be like this: 824 * 825 * +-------------------------+ 826 * | struct wiphy | 827 * +-------------------------+ 828 * | struct ieee80211_local | 829 * +-------------------------+ 830 * | driver's private data | 831 * +-------------------------+ 832 * 833 */ 834 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 835 836 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 837 838 if (!wiphy) 839 return NULL; 840 841 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 842 843 wiphy->privid = mac80211_wiphy_privid; 844 845 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 846 WIPHY_FLAG_4ADDR_AP | 847 WIPHY_FLAG_4ADDR_STATION | 848 WIPHY_FLAG_REPORTS_OBSS | 849 WIPHY_FLAG_OFFCHAN_TX; 850 851 if (emulate_chanctx || ops->remain_on_channel) 852 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 853 854 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 855 NL80211_FEATURE_SAE | 856 NL80211_FEATURE_HT_IBSS | 857 NL80211_FEATURE_VIF_TXPOWER | 858 NL80211_FEATURE_MAC_ON_CREATE | 859 NL80211_FEATURE_USERSPACE_MPM | 860 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 861 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 862 wiphy_ext_feature_set(wiphy, 863 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 864 wiphy_ext_feature_set(wiphy, 865 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 866 wiphy_ext_feature_set(wiphy, 867 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 868 wiphy_ext_feature_set(wiphy, 869 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 870 wiphy_ext_feature_set(wiphy, 871 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 872 873 if (!ops->hw_scan) { 874 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 875 NL80211_FEATURE_AP_SCAN; 876 /* 877 * if the driver behaves correctly using the probe request 878 * (template) from mac80211, then both of these should be 879 * supported even with hw scan - but let drivers opt in. 880 */ 881 wiphy_ext_feature_set(wiphy, 882 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 883 wiphy_ext_feature_set(wiphy, 884 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 885 } 886 887 if (!ops->set_key) { 888 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 889 wiphy_ext_feature_set(wiphy, 890 NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT); 891 } 892 893 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 894 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 895 896 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 897 898 local = wiphy_priv(wiphy); 899 900 if (sta_info_init(local)) 901 goto err_free; 902 903 local->hw.wiphy = wiphy; 904 905 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 906 907 local->ops = ops; 908 local->emulate_chanctx = emulate_chanctx; 909 910 if (emulate_chanctx) 911 ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA); 912 913 /* 914 * We need a bit of data queued to build aggregates properly, so 915 * instruct the TCP stack to allow more than a single ms of data 916 * to be queued in the stack. The value is a bit-shift of 1 917 * second, so 7 is ~8ms of queued data. Only affects local TCP 918 * sockets. 919 * This is the default, anyhow - drivers may need to override it 920 * for local reasons (longer buffers, longer completion time, or 921 * similar). 922 */ 923 local->hw.tx_sk_pacing_shift = 7; 924 925 /* set up some defaults */ 926 local->hw.queues = 1; 927 local->hw.max_rates = 1; 928 local->hw.max_report_rates = 0; 929 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 930 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 931 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 932 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 933 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 934 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 935 IEEE80211_RADIOTAP_MCS_HAVE_GI | 936 IEEE80211_RADIOTAP_MCS_HAVE_BW; 937 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 938 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 939 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 940 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 941 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 942 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 943 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 944 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 945 946 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 947 948 wiphy->extended_capabilities = local->ext_capa; 949 wiphy->extended_capabilities_mask = local->ext_capa; 950 wiphy->extended_capabilities_len = 951 ARRAY_SIZE(local->ext_capa); 952 953 INIT_LIST_HEAD(&local->interfaces); 954 INIT_LIST_HEAD(&local->mon_list); 955 956 __hw_addr_init(&local->mc_list); 957 958 mutex_init(&local->iflist_mtx); 959 spin_lock_init(&local->filter_lock); 960 spin_lock_init(&local->rx_path_lock); 961 spin_lock_init(&local->queue_stop_reason_lock); 962 963 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 964 INIT_LIST_HEAD(&local->active_txqs[i]); 965 spin_lock_init(&local->active_txq_lock[i]); 966 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 967 local->aql_txq_limit_high[i] = 968 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 969 atomic_set(&local->aql_ac_pending_airtime[i], 0); 970 } 971 972 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 973 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 974 atomic_set(&local->aql_total_pending_airtime, 0); 975 976 spin_lock_init(&local->handle_wake_tx_queue_lock); 977 978 INIT_LIST_HEAD(&local->chanctx_list); 979 980 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 981 982 INIT_WORK(&local->restart_work, ieee80211_restart_work); 983 984 wiphy_work_init(&local->radar_detected_work, 985 ieee80211_dfs_radar_detected_work); 986 987 wiphy_work_init(&local->reconfig_filter, ieee80211_reconfig_filter); 988 989 wiphy_work_init(&local->dynamic_ps_enable_work, 990 ieee80211_dynamic_ps_enable_work); 991 wiphy_work_init(&local->dynamic_ps_disable_work, 992 ieee80211_dynamic_ps_disable_work); 993 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 994 995 wiphy_work_init(&local->sched_scan_stopped_work, 996 ieee80211_sched_scan_stopped_work); 997 998 spin_lock_init(&local->ack_status_lock); 999 idr_init(&local->ack_status_frames); 1000 1001 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 1002 skb_queue_head_init(&local->pending[i]); 1003 atomic_set(&local->agg_queue_stop[i], 0); 1004 } 1005 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 1006 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 1007 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 1008 1009 skb_queue_head_init(&local->skb_queue); 1010 skb_queue_head_init(&local->skb_queue_unreliable); 1011 1012 ieee80211_alloc_led_names(local); 1013 1014 ieee80211_roc_setup(local); 1015 1016 local->hw.radiotap_timestamp.units_pos = -1; 1017 local->hw.radiotap_timestamp.accuracy = -1; 1018 1019 return &local->hw; 1020 err_free: 1021 wiphy_free(wiphy); 1022 return NULL; 1023 } 1024 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 1025 1026 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 1027 { 1028 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 1029 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 1030 int r = 0, w = 0; 1031 u32 *suites; 1032 static const u32 cipher_suites[] = { 1033 /* keep WEP first, it may be removed below */ 1034 WLAN_CIPHER_SUITE_WEP40, 1035 WLAN_CIPHER_SUITE_WEP104, 1036 WLAN_CIPHER_SUITE_TKIP, 1037 WLAN_CIPHER_SUITE_CCMP, 1038 WLAN_CIPHER_SUITE_CCMP_256, 1039 WLAN_CIPHER_SUITE_GCMP, 1040 WLAN_CIPHER_SUITE_GCMP_256, 1041 1042 /* keep last -- depends on hw flags! */ 1043 WLAN_CIPHER_SUITE_AES_CMAC, 1044 WLAN_CIPHER_SUITE_BIP_CMAC_256, 1045 WLAN_CIPHER_SUITE_BIP_GMAC_128, 1046 WLAN_CIPHER_SUITE_BIP_GMAC_256, 1047 }; 1048 1049 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 1050 local->hw.wiphy->cipher_suites) { 1051 /* If the driver advertises, or doesn't support SW crypto, 1052 * we only need to remove WEP if necessary. 1053 */ 1054 if (have_wep) 1055 return 0; 1056 1057 /* well if it has _no_ ciphers ... fine */ 1058 if (!local->hw.wiphy->n_cipher_suites) 1059 return 0; 1060 1061 /* Driver provides cipher suites, but we need to exclude WEP */ 1062 suites = kmemdup_array(local->hw.wiphy->cipher_suites, 1063 local->hw.wiphy->n_cipher_suites, 1064 sizeof(u32), GFP_KERNEL); 1065 if (!suites) 1066 return -ENOMEM; 1067 1068 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 1069 u32 suite = local->hw.wiphy->cipher_suites[r]; 1070 1071 if (suite == WLAN_CIPHER_SUITE_WEP40 || 1072 suite == WLAN_CIPHER_SUITE_WEP104) 1073 continue; 1074 suites[w++] = suite; 1075 } 1076 } else { 1077 /* assign the (software supported and perhaps offloaded) 1078 * cipher suites 1079 */ 1080 local->hw.wiphy->cipher_suites = cipher_suites; 1081 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 1082 1083 if (!have_mfp) 1084 local->hw.wiphy->n_cipher_suites -= 4; 1085 1086 if (!have_wep) { 1087 local->hw.wiphy->cipher_suites += 2; 1088 local->hw.wiphy->n_cipher_suites -= 2; 1089 } 1090 1091 /* not dynamically allocated, so just return */ 1092 return 0; 1093 } 1094 1095 local->hw.wiphy->cipher_suites = suites; 1096 local->hw.wiphy->n_cipher_suites = w; 1097 local->wiphy_ciphers_allocated = true; 1098 1099 return 0; 1100 } 1101 1102 static bool 1103 ieee80211_ifcomb_check(const struct ieee80211_iface_combination *c, int n_comb) 1104 { 1105 int i, j; 1106 1107 for (i = 0; i < n_comb; i++, c++) { 1108 /* DFS is not supported with multi-channel combinations yet */ 1109 if (c->radar_detect_widths && 1110 c->num_different_channels > 1) 1111 return false; 1112 1113 /* mac80211 doesn't support more than one IBSS interface */ 1114 for (j = 0; j < c->n_limits; j++) 1115 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1116 c->limits[j].max > 1) 1117 return false; 1118 } 1119 1120 return true; 1121 } 1122 1123 int ieee80211_register_hw(struct ieee80211_hw *hw) 1124 { 1125 struct ieee80211_local *local = hw_to_local(hw); 1126 int result, i; 1127 enum nl80211_band band; 1128 int channels, max_bitrates; 1129 bool supp_ht, supp_vht, supp_he, supp_eht; 1130 struct cfg80211_chan_def dflt_chandef = {}; 1131 1132 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 1133 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 1134 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 1135 return -EINVAL; 1136 1137 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 1138 (!local->ops->tdls_channel_switch || 1139 !local->ops->tdls_cancel_channel_switch || 1140 !local->ops->tdls_recv_channel_switch)) 1141 return -EOPNOTSUPP; 1142 1143 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 1144 !local->ops->set_frag_threshold)) 1145 return -EINVAL; 1146 1147 if (WARN_ON(local->hw.wiphy->interface_modes & 1148 BIT(NL80211_IFTYPE_NAN) && 1149 (!local->ops->start_nan || !local->ops->stop_nan))) 1150 return -EINVAL; 1151 1152 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 1153 /* 1154 * For drivers capable of doing MLO, assume modern driver 1155 * or firmware facilities, so software doesn't have to do 1156 * as much, e.g. monitoring beacons would be hard if we 1157 * might not even know which link is active at which time. 1158 */ 1159 if (WARN_ON(local->emulate_chanctx)) 1160 return -EINVAL; 1161 1162 if (WARN_ON(!local->ops->link_info_changed)) 1163 return -EINVAL; 1164 1165 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 1166 return -EINVAL; 1167 1168 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 1169 return -EINVAL; 1170 1171 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 1172 return -EINVAL; 1173 1174 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 1175 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 1176 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 1177 return -EINVAL; 1178 1179 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 1180 return -EINVAL; 1181 1182 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 1183 return -EINVAL; 1184 1185 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1186 return -EINVAL; 1187 1188 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1189 return -EINVAL; 1190 1191 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1192 return -EINVAL; 1193 } 1194 1195 #ifdef CONFIG_PM 1196 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1197 return -EINVAL; 1198 #endif 1199 1200 if (local->emulate_chanctx) { 1201 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1202 const struct ieee80211_iface_combination *comb; 1203 1204 comb = &local->hw.wiphy->iface_combinations[i]; 1205 1206 if (comb->num_different_channels > 1) 1207 return -EINVAL; 1208 } 1209 } 1210 1211 if (hw->wiphy->n_radio) { 1212 for (i = 0; i < hw->wiphy->n_radio; i++) { 1213 const struct wiphy_radio *radio = &hw->wiphy->radio[i]; 1214 1215 if (!ieee80211_ifcomb_check(radio->iface_combinations, 1216 radio->n_iface_combinations)) 1217 return -EINVAL; 1218 } 1219 } else { 1220 if (!ieee80211_ifcomb_check(hw->wiphy->iface_combinations, 1221 hw->wiphy->n_iface_combinations)) 1222 return -EINVAL; 1223 } 1224 1225 /* Only HW csum features are currently compatible with mac80211 */ 1226 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1227 return -EINVAL; 1228 1229 if (hw->max_report_rates == 0) 1230 hw->max_report_rates = hw->max_rates; 1231 1232 local->rx_chains = 1; 1233 1234 /* 1235 * generic code guarantees at least one band, 1236 * set this very early because much code assumes 1237 * that hw.conf.channel is assigned 1238 */ 1239 channels = 0; 1240 max_bitrates = 0; 1241 supp_ht = false; 1242 supp_vht = false; 1243 supp_he = false; 1244 supp_eht = false; 1245 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1246 const struct ieee80211_sband_iftype_data *iftd; 1247 struct ieee80211_supported_band *sband; 1248 1249 sband = local->hw.wiphy->bands[band]; 1250 if (!sband) 1251 continue; 1252 1253 if (!dflt_chandef.chan) { 1254 /* 1255 * Assign the first enabled channel to dflt_chandef 1256 * from the list of channels 1257 */ 1258 for (i = 0; i < sband->n_channels; i++) 1259 if (!(sband->channels[i].flags & 1260 IEEE80211_CHAN_DISABLED)) 1261 break; 1262 /* if none found then use the first anyway */ 1263 if (i == sband->n_channels) 1264 i = 0; 1265 cfg80211_chandef_create(&dflt_chandef, 1266 &sband->channels[i], 1267 NL80211_CHAN_NO_HT); 1268 /* init channel we're on */ 1269 local->monitor_chanreq.oper = dflt_chandef; 1270 if (local->emulate_chanctx) { 1271 local->dflt_chandef = dflt_chandef; 1272 local->hw.conf.chandef = dflt_chandef; 1273 } 1274 } 1275 1276 channels += sband->n_channels; 1277 1278 /* 1279 * Due to the way the aggregation code handles this and it 1280 * being an HT capability, we can't really support delayed 1281 * BA in MLO (yet). 1282 */ 1283 if (WARN_ON(sband->ht_cap.ht_supported && 1284 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1285 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1286 return -EINVAL; 1287 1288 if (max_bitrates < sband->n_bitrates) 1289 max_bitrates = sband->n_bitrates; 1290 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1291 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1292 1293 for_each_sband_iftype_data(sband, i, iftd) { 1294 u8 he_40_mhz_cap; 1295 1296 supp_he = supp_he || iftd->he_cap.has_he; 1297 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1298 1299 if (band == NL80211_BAND_2GHZ) 1300 he_40_mhz_cap = 1301 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 1302 else 1303 he_40_mhz_cap = 1304 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; 1305 1306 /* currently no support for HE client where HT has 40 MHz but not HT */ 1307 if (iftd->he_cap.has_he && 1308 iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | 1309 BIT(NL80211_IFTYPE_P2P_CLIENT)) && 1310 sband->ht_cap.ht_supported && 1311 sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && 1312 !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) 1313 return -EINVAL; 1314 1315 /* no support for per-band vendor elems with MLO */ 1316 if (WARN_ON(iftd->vendor_elems.len && 1317 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1318 return -EINVAL; 1319 } 1320 1321 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1322 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1323 (supp_ht || supp_vht || supp_he))) 1324 return -EINVAL; 1325 1326 /* EHT requires HE support */ 1327 if (WARN_ON(supp_eht && !supp_he)) 1328 return -EINVAL; 1329 1330 if (!sband->ht_cap.ht_supported) 1331 continue; 1332 1333 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1334 local->rx_chains = 1335 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1336 local->rx_chains); 1337 1338 /* no need to mask, SM_PS_DISABLED has all bits set */ 1339 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1340 IEEE80211_HT_CAP_SM_PS_SHIFT; 1341 } 1342 1343 /* if low-level driver supports AP, we also support VLAN. 1344 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1345 * based on their support to transmit SW encrypted packets. 1346 */ 1347 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1348 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1349 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1350 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1351 } 1352 1353 /* mac80211 always supports monitor */ 1354 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1355 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1356 1357 1358 local->int_scan_req = kzalloc(struct_size(local->int_scan_req, 1359 channels, channels), 1360 GFP_KERNEL); 1361 if (!local->int_scan_req) 1362 return -ENOMEM; 1363 local->int_scan_req->n_channels = channels; 1364 1365 eth_broadcast_addr(local->int_scan_req->bssid); 1366 1367 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1368 if (!local->hw.wiphy->bands[band]) 1369 continue; 1370 local->int_scan_req->rates[band] = (u32) -1; 1371 } 1372 1373 #ifndef CONFIG_MAC80211_MESH 1374 /* mesh depends on Kconfig, but drivers should set it if they want */ 1375 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1376 #endif 1377 1378 /* if the underlying driver supports mesh, mac80211 will (at least) 1379 * provide routing of mesh authentication frames to userspace */ 1380 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1381 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1382 1383 /* mac80211 supports control port protocol changing */ 1384 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1385 1386 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1387 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1388 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1389 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1390 if (hw->max_signal <= 0) { 1391 result = -EINVAL; 1392 goto fail_workqueue; 1393 } 1394 } 1395 1396 /* Mac80211 and therefore all drivers using SW crypto only 1397 * are able to handle PTK rekeys and Extended Key ID. 1398 */ 1399 if (!local->ops->set_key) { 1400 wiphy_ext_feature_set(local->hw.wiphy, 1401 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1402 wiphy_ext_feature_set(local->hw.wiphy, 1403 NL80211_EXT_FEATURE_EXT_KEY_ID); 1404 } 1405 1406 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1407 wiphy_ext_feature_set(local->hw.wiphy, 1408 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1409 1410 /* 1411 * Calculate scan IE length -- we need this to alloc 1412 * memory and to subtract from the driver limit. It 1413 * includes the DS Params, (extended) supported rates, and HT 1414 * information -- SSID is the driver's responsibility. 1415 */ 1416 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1417 3 /* DS Params */; 1418 if (supp_ht) 1419 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1420 1421 if (supp_vht) 1422 local->scan_ies_len += 1423 2 + sizeof(struct ieee80211_vht_cap); 1424 1425 /* 1426 * HE cap element is variable in size - set len to allow max size */ 1427 if (supp_he) { 1428 local->scan_ies_len += 1429 3 + sizeof(struct ieee80211_he_cap_elem) + 1430 sizeof(struct ieee80211_he_mcs_nss_supp) + 1431 IEEE80211_HE_PPE_THRES_MAX_LEN; 1432 1433 if (supp_eht) 1434 local->scan_ies_len += 1435 3 + sizeof(struct ieee80211_eht_cap_elem) + 1436 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1437 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1438 } 1439 1440 if (!local->ops->hw_scan) { 1441 /* For hw_scan, driver needs to set these up. */ 1442 local->hw.wiphy->max_scan_ssids = 4; 1443 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1444 } 1445 1446 /* 1447 * If the driver supports any scan IEs, then assume the 1448 * limit includes the IEs mac80211 will add, otherwise 1449 * leave it at zero and let the driver sort it out; we 1450 * still pass our IEs to the driver but userspace will 1451 * not be allowed to in that case. 1452 */ 1453 if (local->hw.wiphy->max_scan_ie_len) 1454 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1455 1456 result = ieee80211_init_cipher_suites(local); 1457 if (result < 0) 1458 goto fail_workqueue; 1459 1460 if (!local->ops->remain_on_channel) 1461 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1462 1463 /* mac80211 based drivers don't support internal TDLS setup */ 1464 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1465 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1466 1467 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1468 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1469 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1470 1471 /* mac80211 supports multi BSSID, if the driver supports it */ 1472 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1473 local->hw.wiphy->support_mbssid = true; 1474 if (ieee80211_hw_check(&local->hw, 1475 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1476 local->hw.wiphy->support_only_he_mbssid = true; 1477 else 1478 local->ext_capa[2] |= 1479 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1480 } 1481 1482 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1483 1484 /* 1485 * We use the number of queues for feature tests (QoS, HT) internally 1486 * so restrict them appropriately. 1487 */ 1488 if (hw->queues > IEEE80211_MAX_QUEUES) 1489 hw->queues = IEEE80211_MAX_QUEUES; 1490 1491 local->workqueue = 1492 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1493 if (!local->workqueue) { 1494 result = -ENOMEM; 1495 goto fail_workqueue; 1496 } 1497 1498 /* 1499 * The hardware needs headroom for sending the frame, 1500 * and we need some headroom for passing the frame to monitor 1501 * interfaces, but never both at the same time. 1502 */ 1503 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1504 IEEE80211_TX_STATUS_HEADROOM); 1505 1506 /* 1507 * if the driver doesn't specify a max listen interval we 1508 * use 5 which should be a safe default 1509 */ 1510 if (local->hw.max_listen_interval == 0) 1511 local->hw.max_listen_interval = 5; 1512 1513 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1514 1515 local->dynamic_ps_forced_timeout = -1; 1516 1517 if (!local->hw.max_nan_de_entries) 1518 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1519 1520 if (!local->hw.weight_multiplier) 1521 local->hw.weight_multiplier = 1; 1522 1523 ieee80211_wep_init(local); 1524 1525 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1526 1527 ieee80211_led_init(local); 1528 1529 result = ieee80211_txq_setup_flows(local); 1530 if (result) 1531 goto fail_flows; 1532 1533 rtnl_lock(); 1534 result = ieee80211_init_rate_ctrl_alg(local, 1535 hw->rate_control_algorithm); 1536 rtnl_unlock(); 1537 if (result < 0) { 1538 wiphy_debug(local->hw.wiphy, 1539 "Failed to initialize rate control algorithm\n"); 1540 goto fail_rate; 1541 } 1542 1543 if (local->rate_ctrl) { 1544 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1545 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1546 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1547 } 1548 1549 /* 1550 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1551 * or have it when we don't, copy the sband structure and set/clear it. 1552 * This is necessary because rate scaling algorithms could be switched 1553 * and have different support values. 1554 * Print a message so that in the common case the reallocation can be 1555 * avoided. 1556 */ 1557 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1558 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1559 struct ieee80211_supported_band *sband; 1560 bool local_cap, ie_cap; 1561 1562 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1563 1564 sband = local->hw.wiphy->bands[band]; 1565 if (!sband || !sband->vht_cap.vht_supported) 1566 continue; 1567 1568 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1569 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1570 1571 if (local_cap == ie_cap) 1572 continue; 1573 1574 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1575 if (!sband) { 1576 result = -ENOMEM; 1577 goto fail_rate; 1578 } 1579 1580 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1581 band); 1582 1583 sband->vht_cap.vht_mcs.tx_highest ^= 1584 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1585 1586 local->hw.wiphy->bands[band] = sband; 1587 local->sband_allocated |= BIT(band); 1588 } 1589 1590 result = wiphy_register(local->hw.wiphy); 1591 if (result < 0) 1592 goto fail_wiphy_register; 1593 1594 debugfs_hw_add(local); 1595 rate_control_add_debugfs(local); 1596 1597 ieee80211_check_wbrf_support(local); 1598 1599 rtnl_lock(); 1600 wiphy_lock(hw->wiphy); 1601 1602 /* add one default STA interface if supported */ 1603 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1604 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1605 struct vif_params params = {0}; 1606 1607 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1608 NL80211_IFTYPE_STATION, ¶ms); 1609 if (result) 1610 wiphy_warn(local->hw.wiphy, 1611 "Failed to add default virtual iface\n"); 1612 } 1613 1614 wiphy_unlock(hw->wiphy); 1615 rtnl_unlock(); 1616 1617 #ifdef CONFIG_INET 1618 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1619 result = register_inetaddr_notifier(&local->ifa_notifier); 1620 if (result) 1621 goto fail_ifa; 1622 #endif 1623 1624 #if IS_ENABLED(CONFIG_IPV6) 1625 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1626 result = register_inet6addr_notifier(&local->ifa6_notifier); 1627 if (result) 1628 goto fail_ifa6; 1629 #endif 1630 1631 return 0; 1632 1633 #if IS_ENABLED(CONFIG_IPV6) 1634 fail_ifa6: 1635 #ifdef CONFIG_INET 1636 unregister_inetaddr_notifier(&local->ifa_notifier); 1637 #endif 1638 #endif 1639 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1640 fail_ifa: 1641 #endif 1642 wiphy_unregister(local->hw.wiphy); 1643 fail_wiphy_register: 1644 rtnl_lock(); 1645 rate_control_deinitialize(local); 1646 ieee80211_remove_interfaces(local); 1647 rtnl_unlock(); 1648 fail_rate: 1649 ieee80211_txq_teardown_flows(local); 1650 fail_flows: 1651 ieee80211_led_exit(local); 1652 destroy_workqueue(local->workqueue); 1653 fail_workqueue: 1654 if (local->wiphy_ciphers_allocated) { 1655 kfree(local->hw.wiphy->cipher_suites); 1656 local->wiphy_ciphers_allocated = false; 1657 } 1658 kfree(local->int_scan_req); 1659 return result; 1660 } 1661 EXPORT_SYMBOL(ieee80211_register_hw); 1662 1663 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1664 { 1665 struct ieee80211_local *local = hw_to_local(hw); 1666 1667 tasklet_kill(&local->tx_pending_tasklet); 1668 tasklet_kill(&local->tasklet); 1669 1670 #ifdef CONFIG_INET 1671 unregister_inetaddr_notifier(&local->ifa_notifier); 1672 #endif 1673 #if IS_ENABLED(CONFIG_IPV6) 1674 unregister_inet6addr_notifier(&local->ifa6_notifier); 1675 #endif 1676 1677 rtnl_lock(); 1678 1679 /* 1680 * At this point, interface list manipulations are fine 1681 * because the driver cannot be handing us frames any 1682 * more and the tasklet is killed. 1683 */ 1684 ieee80211_remove_interfaces(local); 1685 1686 ieee80211_txq_teardown_flows(local); 1687 1688 wiphy_lock(local->hw.wiphy); 1689 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1690 wiphy_work_cancel(local->hw.wiphy, &local->reconfig_filter); 1691 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1692 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1693 wiphy_unlock(local->hw.wiphy); 1694 rtnl_unlock(); 1695 1696 cancel_work_sync(&local->restart_work); 1697 1698 ieee80211_clear_tx_pending(local); 1699 rate_control_deinitialize(local); 1700 1701 if (skb_queue_len(&local->skb_queue) || 1702 skb_queue_len(&local->skb_queue_unreliable)) 1703 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1704 skb_queue_purge(&local->skb_queue); 1705 skb_queue_purge(&local->skb_queue_unreliable); 1706 1707 wiphy_unregister(local->hw.wiphy); 1708 destroy_workqueue(local->workqueue); 1709 ieee80211_led_exit(local); 1710 kfree(local->int_scan_req); 1711 } 1712 EXPORT_SYMBOL(ieee80211_unregister_hw); 1713 1714 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1715 { 1716 WARN_ONCE(1, "Have pending ack frames!\n"); 1717 kfree_skb(p); 1718 return 0; 1719 } 1720 1721 void ieee80211_free_hw(struct ieee80211_hw *hw) 1722 { 1723 struct ieee80211_local *local = hw_to_local(hw); 1724 enum nl80211_band band; 1725 1726 mutex_destroy(&local->iflist_mtx); 1727 1728 if (local->wiphy_ciphers_allocated) { 1729 kfree(local->hw.wiphy->cipher_suites); 1730 local->wiphy_ciphers_allocated = false; 1731 } 1732 1733 idr_for_each(&local->ack_status_frames, 1734 ieee80211_free_ack_frame, NULL); 1735 idr_destroy(&local->ack_status_frames); 1736 1737 sta_info_stop(local); 1738 1739 ieee80211_free_led_names(local); 1740 1741 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1742 if (!(local->sband_allocated & BIT(band))) 1743 continue; 1744 kfree(local->hw.wiphy->bands[band]); 1745 } 1746 1747 wiphy_free(local->hw.wiphy); 1748 } 1749 EXPORT_SYMBOL(ieee80211_free_hw); 1750 #define V(x) #x, 1751 static const char * const drop_reasons_unusable[] = { 1752 [0] = "RX_DROP_UNUSABLE", 1753 MAC80211_DROP_REASONS_UNUSABLE(V) 1754 #undef V 1755 }; 1756 1757 static struct drop_reason_list drop_reason_list_unusable = { 1758 .reasons = drop_reasons_unusable, 1759 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1760 }; 1761 1762 static int __init ieee80211_init(void) 1763 { 1764 struct sk_buff *skb; 1765 int ret; 1766 1767 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1768 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1769 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1770 1771 ret = rc80211_minstrel_init(); 1772 if (ret) 1773 return ret; 1774 1775 ret = ieee80211_iface_init(); 1776 if (ret) 1777 goto err_netdev; 1778 1779 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1780 &drop_reason_list_unusable); 1781 1782 return 0; 1783 err_netdev: 1784 rc80211_minstrel_exit(); 1785 1786 return ret; 1787 } 1788 1789 static void __exit ieee80211_exit(void) 1790 { 1791 rc80211_minstrel_exit(); 1792 1793 ieee80211s_stop(); 1794 1795 ieee80211_iface_exit(); 1796 1797 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1798 1799 rcu_barrier(); 1800 } 1801 1802 1803 subsys_initcall(ieee80211_init); 1804 module_exit(ieee80211_exit); 1805 1806 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1807 MODULE_LICENSE("GPL"); 1808