1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <net/mac80211.h> 13 #include <linux/module.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/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 spin_lock_bh(&local->filter_lock); 68 changed_flags = local->filter_flags ^ new_flags; 69 70 mc = drv_prepare_multicast(local, &local->mc_list); 71 spin_unlock_bh(&local->filter_lock); 72 73 /* be a bit nasty */ 74 new_flags |= (1<<31); 75 76 drv_configure_filter(local, changed_flags, &new_flags, mc); 77 78 WARN_ON(new_flags & (1<<31)); 79 80 local->filter_flags = new_flags & ~(1<<31); 81 } 82 83 static void ieee80211_reconfig_filter(struct work_struct *work) 84 { 85 struct ieee80211_local *local = 86 container_of(work, struct ieee80211_local, reconfig_filter); 87 88 ieee80211_configure_filter(local); 89 } 90 91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 92 { 93 struct ieee80211_sub_if_data *sdata; 94 struct cfg80211_chan_def chandef = {}; 95 u32 changed = 0; 96 int power; 97 u32 offchannel_flag; 98 99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 100 101 if (local->scan_chandef.chan) { 102 chandef = local->scan_chandef; 103 } else if (local->tmp_channel) { 104 chandef.chan = local->tmp_channel; 105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 106 chandef.center_freq1 = chandef.chan->center_freq; 107 } else 108 chandef = local->_oper_chandef; 109 110 WARN(!cfg80211_chandef_valid(&chandef), 111 "control:%d MHz width:%d center: %d/%d MHz", 112 chandef.chan->center_freq, chandef.width, 113 chandef.center_freq1, chandef.center_freq2); 114 115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 117 else 118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 119 120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 121 122 if (offchannel_flag || 123 !cfg80211_chandef_identical(&local->hw.conf.chandef, 124 &local->_oper_chandef)) { 125 local->hw.conf.chandef = chandef; 126 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 127 } 128 129 if (!conf_is_ht(&local->hw.conf)) { 130 /* 131 * mac80211.h documents that this is only valid 132 * when the channel is set to an HT type, and 133 * that otherwise STATIC is used. 134 */ 135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 136 } else if (local->hw.conf.smps_mode != local->smps_mode) { 137 local->hw.conf.smps_mode = local->smps_mode; 138 changed |= IEEE80211_CONF_CHANGE_SMPS; 139 } 140 141 power = ieee80211_chandef_max_power(&chandef); 142 143 rcu_read_lock(); 144 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 145 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 146 continue; 147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 148 continue; 149 power = min(power, sdata->vif.bss_conf.txpower); 150 } 151 rcu_read_unlock(); 152 153 if (local->hw.conf.power_level != power) { 154 changed |= IEEE80211_CONF_CHANGE_POWER; 155 local->hw.conf.power_level = power; 156 } 157 158 return changed; 159 } 160 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 162 { 163 int ret = 0; 164 165 might_sleep(); 166 167 if (!local->use_chanctx) 168 changed |= ieee80211_hw_conf_chan(local); 169 else 170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 171 IEEE80211_CONF_CHANGE_POWER); 172 173 if (changed && local->open_count) { 174 ret = drv_config(local, changed); 175 /* 176 * Goal: 177 * HW reconfiguration should never fail, the driver has told 178 * us what it can support so it should live up to that promise. 179 * 180 * Current status: 181 * rfkill is not integrated with mac80211 and a 182 * configuration command can thus fail if hardware rfkill 183 * is enabled 184 * 185 * FIXME: integrate rfkill with mac80211 and then add this 186 * WARN_ON() back 187 * 188 */ 189 /* WARN_ON(ret); */ 190 } 191 192 return ret; 193 } 194 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 196 u32 changed) 197 { 198 struct ieee80211_local *local = sdata->local; 199 200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 201 return; 202 203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 204 } 205 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 207 { 208 sdata->vif.bss_conf.use_cts_prot = false; 209 sdata->vif.bss_conf.use_short_preamble = false; 210 sdata->vif.bss_conf.use_short_slot = false; 211 return BSS_CHANGED_ERP_CTS_PROT | 212 BSS_CHANGED_ERP_PREAMBLE | 213 BSS_CHANGED_ERP_SLOT; 214 } 215 216 static void ieee80211_tasklet_handler(unsigned long data) 217 { 218 struct ieee80211_local *local = (struct ieee80211_local *) data; 219 struct sk_buff *skb; 220 221 while ((skb = skb_dequeue(&local->skb_queue)) || 222 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 223 switch (skb->pkt_type) { 224 case IEEE80211_RX_MSG: 225 /* Clear skb->pkt_type in order to not confuse kernel 226 * netstack. */ 227 skb->pkt_type = 0; 228 ieee80211_rx(&local->hw, skb); 229 break; 230 case IEEE80211_TX_STATUS_MSG: 231 skb->pkt_type = 0; 232 ieee80211_tx_status(&local->hw, skb); 233 break; 234 default: 235 WARN(1, "mac80211: Packet is of unknown type %d\n", 236 skb->pkt_type); 237 dev_kfree_skb(skb); 238 break; 239 } 240 } 241 } 242 243 static void ieee80211_restart_work(struct work_struct *work) 244 { 245 struct ieee80211_local *local = 246 container_of(work, struct ieee80211_local, restart_work); 247 struct ieee80211_sub_if_data *sdata; 248 249 /* wait for scan work complete */ 250 flush_workqueue(local->workqueue); 251 flush_work(&local->sched_scan_stopped_work); 252 253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 254 "%s called with hardware scan in progress\n", __func__); 255 256 flush_work(&local->radar_detected_work); 257 rtnl_lock(); 258 list_for_each_entry(sdata, &local->interfaces, list) 259 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 260 ieee80211_scan_cancel(local); 261 262 /* make sure any new ROC will consider local->in_reconfig */ 263 flush_delayed_work(&local->roc_work); 264 flush_work(&local->hw_roc_done); 265 266 /* wait for all packet processing to be done */ 267 synchronize_net(); 268 269 ieee80211_reconfig(local); 270 rtnl_unlock(); 271 } 272 273 void ieee80211_restart_hw(struct ieee80211_hw *hw) 274 { 275 struct ieee80211_local *local = hw_to_local(hw); 276 277 trace_api_restart_hw(local); 278 279 wiphy_info(hw->wiphy, 280 "Hardware restart was requested\n"); 281 282 /* use this reason, ieee80211_reconfig will unblock it */ 283 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 284 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 285 false); 286 287 /* 288 * Stop all Rx during the reconfig. We don't want state changes 289 * or driver callbacks while this is in progress. 290 */ 291 local->in_reconfig = true; 292 barrier(); 293 294 queue_work(system_freezable_wq, &local->restart_work); 295 } 296 EXPORT_SYMBOL(ieee80211_restart_hw); 297 298 #ifdef CONFIG_INET 299 static int ieee80211_ifa_changed(struct notifier_block *nb, 300 unsigned long data, void *arg) 301 { 302 struct in_ifaddr *ifa = arg; 303 struct ieee80211_local *local = 304 container_of(nb, struct ieee80211_local, 305 ifa_notifier); 306 struct net_device *ndev = ifa->ifa_dev->dev; 307 struct wireless_dev *wdev = ndev->ieee80211_ptr; 308 struct in_device *idev; 309 struct ieee80211_sub_if_data *sdata; 310 struct ieee80211_bss_conf *bss_conf; 311 struct ieee80211_if_managed *ifmgd; 312 int c = 0; 313 314 /* Make sure it's our interface that got changed */ 315 if (!wdev) 316 return NOTIFY_DONE; 317 318 if (wdev->wiphy != local->hw.wiphy) 319 return NOTIFY_DONE; 320 321 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 322 bss_conf = &sdata->vif.bss_conf; 323 324 /* ARP filtering is only supported in managed mode */ 325 if (sdata->vif.type != NL80211_IFTYPE_STATION) 326 return NOTIFY_DONE; 327 328 idev = __in_dev_get_rtnl(sdata->dev); 329 if (!idev) 330 return NOTIFY_DONE; 331 332 ifmgd = &sdata->u.mgd; 333 sdata_lock(sdata); 334 335 /* Copy the addresses to the bss_conf list */ 336 ifa = idev->ifa_list; 337 while (ifa) { 338 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 339 bss_conf->arp_addr_list[c] = ifa->ifa_address; 340 ifa = ifa->ifa_next; 341 c++; 342 } 343 344 bss_conf->arp_addr_cnt = c; 345 346 /* Configure driver only if associated (which also implies it is up) */ 347 if (ifmgd->associated) 348 ieee80211_bss_info_change_notify(sdata, 349 BSS_CHANGED_ARP_FILTER); 350 351 sdata_unlock(sdata); 352 353 return NOTIFY_OK; 354 } 355 #endif 356 357 #if IS_ENABLED(CONFIG_IPV6) 358 static int ieee80211_ifa6_changed(struct notifier_block *nb, 359 unsigned long data, void *arg) 360 { 361 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 362 struct inet6_dev *idev = ifa->idev; 363 struct net_device *ndev = ifa->idev->dev; 364 struct ieee80211_local *local = 365 container_of(nb, struct ieee80211_local, ifa6_notifier); 366 struct wireless_dev *wdev = ndev->ieee80211_ptr; 367 struct ieee80211_sub_if_data *sdata; 368 369 /* Make sure it's our interface that got changed */ 370 if (!wdev || wdev->wiphy != local->hw.wiphy) 371 return NOTIFY_DONE; 372 373 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 374 375 /* 376 * For now only support station mode. This is mostly because 377 * doing AP would have to handle AP_VLAN in some way ... 378 */ 379 if (sdata->vif.type != NL80211_IFTYPE_STATION) 380 return NOTIFY_DONE; 381 382 drv_ipv6_addr_change(local, sdata, idev); 383 384 return NOTIFY_OK; 385 } 386 #endif 387 388 /* There isn't a lot of sense in it, but you can transmit anything you like */ 389 static const struct ieee80211_txrx_stypes 390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 391 [NL80211_IFTYPE_ADHOC] = { 392 .tx = 0xffff, 393 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 394 BIT(IEEE80211_STYPE_AUTH >> 4) | 395 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 397 }, 398 [NL80211_IFTYPE_STATION] = { 399 .tx = 0xffff, 400 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 401 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 402 }, 403 [NL80211_IFTYPE_AP] = { 404 .tx = 0xffff, 405 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 406 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 407 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 408 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 409 BIT(IEEE80211_STYPE_AUTH >> 4) | 410 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 411 BIT(IEEE80211_STYPE_ACTION >> 4), 412 }, 413 [NL80211_IFTYPE_AP_VLAN] = { 414 /* copy AP */ 415 .tx = 0xffff, 416 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 417 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 419 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 420 BIT(IEEE80211_STYPE_AUTH >> 4) | 421 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 422 BIT(IEEE80211_STYPE_ACTION >> 4), 423 }, 424 [NL80211_IFTYPE_P2P_CLIENT] = { 425 .tx = 0xffff, 426 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 428 }, 429 [NL80211_IFTYPE_P2P_GO] = { 430 .tx = 0xffff, 431 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 432 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 433 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 434 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 435 BIT(IEEE80211_STYPE_AUTH >> 4) | 436 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 437 BIT(IEEE80211_STYPE_ACTION >> 4), 438 }, 439 [NL80211_IFTYPE_MESH_POINT] = { 440 .tx = 0xffff, 441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 442 BIT(IEEE80211_STYPE_AUTH >> 4) | 443 BIT(IEEE80211_STYPE_DEAUTH >> 4), 444 }, 445 [NL80211_IFTYPE_P2P_DEVICE] = { 446 .tx = 0xffff, 447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 449 }, 450 }; 451 452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 453 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 454 IEEE80211_HT_AMPDU_PARM_DENSITY, 455 456 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 457 IEEE80211_HT_CAP_MAX_AMSDU | 458 IEEE80211_HT_CAP_SGI_20 | 459 IEEE80211_HT_CAP_SGI_40 | 460 IEEE80211_HT_CAP_LDPC_CODING | 461 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 462 .mcs = { 463 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 464 0xff, 0xff, 0xff, 0xff, 0xff, }, 465 }, 466 }; 467 468 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 469 .vht_cap_info = 470 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 471 IEEE80211_VHT_CAP_SHORT_GI_80 | 472 IEEE80211_VHT_CAP_SHORT_GI_160 | 473 IEEE80211_VHT_CAP_RXSTBC_1 | 474 IEEE80211_VHT_CAP_RXSTBC_2 | 475 IEEE80211_VHT_CAP_RXSTBC_3 | 476 IEEE80211_VHT_CAP_RXSTBC_4 | 477 IEEE80211_VHT_CAP_TXSTBC | 478 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 479 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 480 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 481 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 482 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 483 .supp_mcs = { 484 .rx_mcs_map = cpu_to_le16(~0), 485 .tx_mcs_map = cpu_to_le16(~0), 486 }, 487 }; 488 489 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 490 const struct ieee80211_ops *ops, 491 const char *requested_name) 492 { 493 struct ieee80211_local *local; 494 int priv_size, i; 495 struct wiphy *wiphy; 496 bool use_chanctx; 497 498 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 499 !ops->add_interface || !ops->remove_interface || 500 !ops->configure_filter)) 501 return NULL; 502 503 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 504 return NULL; 505 506 /* check all or no channel context operations exist */ 507 i = !!ops->add_chanctx + !!ops->remove_chanctx + 508 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 509 !!ops->unassign_vif_chanctx; 510 if (WARN_ON(i != 0 && i != 5)) 511 return NULL; 512 use_chanctx = i == 5; 513 514 /* Ensure 32-byte alignment of our private data and hw private data. 515 * We use the wiphy priv data for both our ieee80211_local and for 516 * the driver's private data 517 * 518 * In memory it'll be like this: 519 * 520 * +-------------------------+ 521 * | struct wiphy | 522 * +-------------------------+ 523 * | struct ieee80211_local | 524 * +-------------------------+ 525 * | driver's private data | 526 * +-------------------------+ 527 * 528 */ 529 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 530 531 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 532 533 if (!wiphy) 534 return NULL; 535 536 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 537 538 wiphy->privid = mac80211_wiphy_privid; 539 540 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 541 WIPHY_FLAG_4ADDR_AP | 542 WIPHY_FLAG_4ADDR_STATION | 543 WIPHY_FLAG_REPORTS_OBSS | 544 WIPHY_FLAG_OFFCHAN_TX; 545 546 if (ops->remain_on_channel) 547 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 548 549 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 550 NL80211_FEATURE_SAE | 551 NL80211_FEATURE_HT_IBSS | 552 NL80211_FEATURE_VIF_TXPOWER | 553 NL80211_FEATURE_MAC_ON_CREATE | 554 NL80211_FEATURE_USERSPACE_MPM | 555 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 556 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 557 558 if (!ops->hw_scan) 559 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 560 NL80211_FEATURE_AP_SCAN; 561 562 563 if (!ops->set_key) 564 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 565 566 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 567 568 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 569 570 local = wiphy_priv(wiphy); 571 572 if (sta_info_init(local)) 573 goto err_free; 574 575 local->hw.wiphy = wiphy; 576 577 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 578 579 local->ops = ops; 580 local->use_chanctx = use_chanctx; 581 582 /* set up some defaults */ 583 local->hw.queues = 1; 584 local->hw.max_rates = 1; 585 local->hw.max_report_rates = 0; 586 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 587 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 588 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 589 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 590 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 591 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 592 IEEE80211_RADIOTAP_MCS_HAVE_GI | 593 IEEE80211_RADIOTAP_MCS_HAVE_BW; 594 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 595 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 596 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 597 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 598 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 599 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 600 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 601 602 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 603 604 wiphy->extended_capabilities = local->ext_capa; 605 wiphy->extended_capabilities_mask = local->ext_capa; 606 wiphy->extended_capabilities_len = 607 ARRAY_SIZE(local->ext_capa); 608 609 INIT_LIST_HEAD(&local->interfaces); 610 INIT_LIST_HEAD(&local->mon_list); 611 612 __hw_addr_init(&local->mc_list); 613 614 mutex_init(&local->iflist_mtx); 615 mutex_init(&local->mtx); 616 617 mutex_init(&local->key_mtx); 618 spin_lock_init(&local->filter_lock); 619 spin_lock_init(&local->rx_path_lock); 620 spin_lock_init(&local->queue_stop_reason_lock); 621 622 INIT_LIST_HEAD(&local->chanctx_list); 623 mutex_init(&local->chanctx_mtx); 624 625 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 626 627 INIT_WORK(&local->restart_work, ieee80211_restart_work); 628 629 INIT_WORK(&local->radar_detected_work, 630 ieee80211_dfs_radar_detected_work); 631 632 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 633 local->smps_mode = IEEE80211_SMPS_OFF; 634 635 INIT_WORK(&local->dynamic_ps_enable_work, 636 ieee80211_dynamic_ps_enable_work); 637 INIT_WORK(&local->dynamic_ps_disable_work, 638 ieee80211_dynamic_ps_disable_work); 639 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 640 641 INIT_WORK(&local->sched_scan_stopped_work, 642 ieee80211_sched_scan_stopped_work); 643 644 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 645 646 spin_lock_init(&local->ack_status_lock); 647 idr_init(&local->ack_status_frames); 648 649 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 650 skb_queue_head_init(&local->pending[i]); 651 atomic_set(&local->agg_queue_stop[i], 0); 652 } 653 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 654 (unsigned long)local); 655 656 tasklet_init(&local->tasklet, 657 ieee80211_tasklet_handler, 658 (unsigned long) local); 659 660 skb_queue_head_init(&local->skb_queue); 661 skb_queue_head_init(&local->skb_queue_unreliable); 662 skb_queue_head_init(&local->skb_queue_tdls_chsw); 663 664 ieee80211_alloc_led_names(local); 665 666 ieee80211_roc_setup(local); 667 668 local->hw.radiotap_timestamp.units_pos = -1; 669 local->hw.radiotap_timestamp.accuracy = -1; 670 671 return &local->hw; 672 err_free: 673 wiphy_free(wiphy); 674 return NULL; 675 } 676 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 677 678 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 679 { 680 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 681 IS_ERR(local->wep_rx_tfm)); 682 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 683 int n_suites = 0, r = 0, w = 0; 684 u32 *suites; 685 static const u32 cipher_suites[] = { 686 /* keep WEP first, it may be removed below */ 687 WLAN_CIPHER_SUITE_WEP40, 688 WLAN_CIPHER_SUITE_WEP104, 689 WLAN_CIPHER_SUITE_TKIP, 690 WLAN_CIPHER_SUITE_CCMP, 691 WLAN_CIPHER_SUITE_CCMP_256, 692 WLAN_CIPHER_SUITE_GCMP, 693 WLAN_CIPHER_SUITE_GCMP_256, 694 695 /* keep last -- depends on hw flags! */ 696 WLAN_CIPHER_SUITE_AES_CMAC, 697 WLAN_CIPHER_SUITE_BIP_CMAC_256, 698 WLAN_CIPHER_SUITE_BIP_GMAC_128, 699 WLAN_CIPHER_SUITE_BIP_GMAC_256, 700 }; 701 702 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 703 local->hw.wiphy->cipher_suites) { 704 /* If the driver advertises, or doesn't support SW crypto, 705 * we only need to remove WEP if necessary. 706 */ 707 if (have_wep) 708 return 0; 709 710 /* well if it has _no_ ciphers ... fine */ 711 if (!local->hw.wiphy->n_cipher_suites) 712 return 0; 713 714 /* Driver provides cipher suites, but we need to exclude WEP */ 715 suites = kmemdup(local->hw.wiphy->cipher_suites, 716 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 717 GFP_KERNEL); 718 if (!suites) 719 return -ENOMEM; 720 721 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 722 u32 suite = local->hw.wiphy->cipher_suites[r]; 723 724 if (suite == WLAN_CIPHER_SUITE_WEP40 || 725 suite == WLAN_CIPHER_SUITE_WEP104) 726 continue; 727 suites[w++] = suite; 728 } 729 } else if (!local->hw.cipher_schemes) { 730 /* If the driver doesn't have cipher schemes, there's nothing 731 * else to do other than assign the (software supported and 732 * perhaps offloaded) cipher suites. 733 */ 734 local->hw.wiphy->cipher_suites = cipher_suites; 735 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 736 737 if (!have_mfp) 738 local->hw.wiphy->n_cipher_suites -= 4; 739 740 if (!have_wep) { 741 local->hw.wiphy->cipher_suites += 2; 742 local->hw.wiphy->n_cipher_suites -= 2; 743 } 744 745 /* not dynamically allocated, so just return */ 746 return 0; 747 } else { 748 const struct ieee80211_cipher_scheme *cs; 749 750 cs = local->hw.cipher_schemes; 751 752 /* Driver specifies cipher schemes only (but not cipher suites 753 * including the schemes) 754 * 755 * We start counting ciphers defined by schemes, TKIP, CCMP, 756 * CCMP-256, GCMP, and GCMP-256 757 */ 758 n_suites = local->hw.n_cipher_schemes + 5; 759 760 /* check if we have WEP40 and WEP104 */ 761 if (have_wep) 762 n_suites += 2; 763 764 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 765 * BIP-GMAC-256 766 */ 767 if (have_mfp) 768 n_suites += 4; 769 770 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 771 if (!suites) 772 return -ENOMEM; 773 774 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 775 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 776 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 777 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 778 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 779 780 if (have_wep) { 781 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 782 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 783 } 784 785 if (have_mfp) { 786 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 787 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 788 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 789 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 790 } 791 792 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 793 suites[w++] = cs[r].cipher; 794 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 795 kfree(suites); 796 return -EINVAL; 797 } 798 } 799 } 800 801 local->hw.wiphy->cipher_suites = suites; 802 local->hw.wiphy->n_cipher_suites = w; 803 local->wiphy_ciphers_allocated = true; 804 805 return 0; 806 } 807 808 int ieee80211_register_hw(struct ieee80211_hw *hw) 809 { 810 struct ieee80211_local *local = hw_to_local(hw); 811 int result, i; 812 enum nl80211_band band; 813 int channels, max_bitrates; 814 bool supp_ht, supp_vht; 815 netdev_features_t feature_whitelist; 816 struct cfg80211_chan_def dflt_chandef = {}; 817 818 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 819 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 820 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 821 return -EINVAL; 822 823 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 824 (!local->ops->tdls_channel_switch || 825 !local->ops->tdls_cancel_channel_switch || 826 !local->ops->tdls_recv_channel_switch)) 827 return -EOPNOTSUPP; 828 829 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 830 !local->ops->set_frag_threshold)) 831 return -EINVAL; 832 833 if (WARN_ON(local->hw.wiphy->interface_modes & 834 BIT(NL80211_IFTYPE_NAN) && 835 (!local->ops->start_nan || !local->ops->stop_nan))) 836 return -EINVAL; 837 838 #ifdef CONFIG_PM 839 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 840 return -EINVAL; 841 #endif 842 843 if (!local->use_chanctx) { 844 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 845 const struct ieee80211_iface_combination *comb; 846 847 comb = &local->hw.wiphy->iface_combinations[i]; 848 849 if (comb->num_different_channels > 1) 850 return -EINVAL; 851 } 852 } else { 853 /* 854 * WDS is currently prohibited when channel contexts are used 855 * because there's no clear definition of which channel WDS 856 * type interfaces use 857 */ 858 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 859 return -EINVAL; 860 861 /* DFS is not supported with multi-channel combinations yet */ 862 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 863 const struct ieee80211_iface_combination *comb; 864 865 comb = &local->hw.wiphy->iface_combinations[i]; 866 867 if (comb->radar_detect_widths && 868 comb->num_different_channels > 1) 869 return -EINVAL; 870 } 871 } 872 873 /* Only HW csum features are currently compatible with mac80211 */ 874 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 875 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 876 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM; 877 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 878 return -EINVAL; 879 880 if (hw->max_report_rates == 0) 881 hw->max_report_rates = hw->max_rates; 882 883 local->rx_chains = 1; 884 885 /* 886 * generic code guarantees at least one band, 887 * set this very early because much code assumes 888 * that hw.conf.channel is assigned 889 */ 890 channels = 0; 891 max_bitrates = 0; 892 supp_ht = false; 893 supp_vht = false; 894 for (band = 0; band < NUM_NL80211_BANDS; band++) { 895 struct ieee80211_supported_band *sband; 896 897 sband = local->hw.wiphy->bands[band]; 898 if (!sband) 899 continue; 900 901 if (!dflt_chandef.chan) { 902 cfg80211_chandef_create(&dflt_chandef, 903 &sband->channels[0], 904 NL80211_CHAN_NO_HT); 905 /* init channel we're on */ 906 if (!local->use_chanctx && !local->_oper_chandef.chan) { 907 local->hw.conf.chandef = dflt_chandef; 908 local->_oper_chandef = dflt_chandef; 909 } 910 local->monitor_chandef = dflt_chandef; 911 } 912 913 channels += sband->n_channels; 914 915 if (max_bitrates < sband->n_bitrates) 916 max_bitrates = sband->n_bitrates; 917 supp_ht = supp_ht || sband->ht_cap.ht_supported; 918 supp_vht = supp_vht || sband->vht_cap.vht_supported; 919 920 if (!sband->ht_cap.ht_supported) 921 continue; 922 923 /* TODO: consider VHT for RX chains, hopefully it's the same */ 924 local->rx_chains = 925 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 926 local->rx_chains); 927 928 /* no need to mask, SM_PS_DISABLED has all bits set */ 929 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 930 IEEE80211_HT_CAP_SM_PS_SHIFT; 931 } 932 933 /* if low-level driver supports AP, we also support VLAN */ 934 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 935 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 936 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 937 } 938 939 /* mac80211 always supports monitor */ 940 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 941 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 942 943 /* mac80211 doesn't support more than one IBSS interface right now */ 944 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 945 const struct ieee80211_iface_combination *c; 946 int j; 947 948 c = &hw->wiphy->iface_combinations[i]; 949 950 for (j = 0; j < c->n_limits; j++) 951 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 952 c->limits[j].max > 1) 953 return -EINVAL; 954 } 955 956 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 957 sizeof(void *) * channels, GFP_KERNEL); 958 if (!local->int_scan_req) 959 return -ENOMEM; 960 961 for (band = 0; band < NUM_NL80211_BANDS; band++) { 962 if (!local->hw.wiphy->bands[band]) 963 continue; 964 local->int_scan_req->rates[band] = (u32) -1; 965 } 966 967 #ifndef CONFIG_MAC80211_MESH 968 /* mesh depends on Kconfig, but drivers should set it if they want */ 969 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 970 #endif 971 972 /* if the underlying driver supports mesh, mac80211 will (at least) 973 * provide routing of mesh authentication frames to userspace */ 974 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 975 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 976 977 /* mac80211 supports control port protocol changing */ 978 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 979 980 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 981 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 982 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 983 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 984 if (hw->max_signal <= 0) { 985 result = -EINVAL; 986 goto fail_wiphy_register; 987 } 988 } 989 990 /* 991 * Calculate scan IE length -- we need this to alloc 992 * memory and to subtract from the driver limit. It 993 * includes the DS Params, (extended) supported rates, and HT 994 * information -- SSID is the driver's responsibility. 995 */ 996 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 997 3 /* DS Params */; 998 if (supp_ht) 999 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1000 1001 if (supp_vht) 1002 local->scan_ies_len += 1003 2 + sizeof(struct ieee80211_vht_cap); 1004 1005 if (!local->ops->hw_scan) { 1006 /* For hw_scan, driver needs to set these up. */ 1007 local->hw.wiphy->max_scan_ssids = 4; 1008 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1009 } 1010 1011 /* 1012 * If the driver supports any scan IEs, then assume the 1013 * limit includes the IEs mac80211 will add, otherwise 1014 * leave it at zero and let the driver sort it out; we 1015 * still pass our IEs to the driver but userspace will 1016 * not be allowed to in that case. 1017 */ 1018 if (local->hw.wiphy->max_scan_ie_len) 1019 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1020 1021 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1022 local->hw.n_cipher_schemes)); 1023 1024 result = ieee80211_init_cipher_suites(local); 1025 if (result < 0) 1026 goto fail_wiphy_register; 1027 1028 if (!local->ops->remain_on_channel) 1029 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1030 1031 /* mac80211 based drivers don't support internal TDLS setup */ 1032 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1033 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1034 1035 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1036 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1037 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1038 1039 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1040 1041 result = wiphy_register(local->hw.wiphy); 1042 if (result < 0) 1043 goto fail_wiphy_register; 1044 1045 /* 1046 * We use the number of queues for feature tests (QoS, HT) internally 1047 * so restrict them appropriately. 1048 */ 1049 if (hw->queues > IEEE80211_MAX_QUEUES) 1050 hw->queues = IEEE80211_MAX_QUEUES; 1051 1052 local->workqueue = 1053 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1054 if (!local->workqueue) { 1055 result = -ENOMEM; 1056 goto fail_workqueue; 1057 } 1058 1059 /* 1060 * The hardware needs headroom for sending the frame, 1061 * and we need some headroom for passing the frame to monitor 1062 * interfaces, but never both at the same time. 1063 */ 1064 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1065 IEEE80211_TX_STATUS_HEADROOM); 1066 1067 debugfs_hw_add(local); 1068 1069 /* 1070 * if the driver doesn't specify a max listen interval we 1071 * use 5 which should be a safe default 1072 */ 1073 if (local->hw.max_listen_interval == 0) 1074 local->hw.max_listen_interval = 5; 1075 1076 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1077 1078 local->dynamic_ps_forced_timeout = -1; 1079 1080 if (!local->hw.max_nan_de_entries) 1081 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1082 1083 result = ieee80211_wep_init(local); 1084 if (result < 0) 1085 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1086 result); 1087 1088 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1089 1090 ieee80211_led_init(local); 1091 1092 rtnl_lock(); 1093 1094 result = ieee80211_init_rate_ctrl_alg(local, 1095 hw->rate_control_algorithm); 1096 if (result < 0) { 1097 wiphy_debug(local->hw.wiphy, 1098 "Failed to initialize rate control algorithm\n"); 1099 goto fail_rate; 1100 } 1101 1102 /* add one default STA interface if supported */ 1103 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1104 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1105 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1106 NL80211_IFTYPE_STATION, NULL); 1107 if (result) 1108 wiphy_warn(local->hw.wiphy, 1109 "Failed to add default virtual iface\n"); 1110 } 1111 1112 rtnl_unlock(); 1113 1114 result = ieee80211_txq_setup_flows(local); 1115 if (result) 1116 goto fail_flows; 1117 1118 #ifdef CONFIG_INET 1119 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1120 result = register_inetaddr_notifier(&local->ifa_notifier); 1121 if (result) 1122 goto fail_ifa; 1123 #endif 1124 1125 #if IS_ENABLED(CONFIG_IPV6) 1126 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1127 result = register_inet6addr_notifier(&local->ifa6_notifier); 1128 if (result) 1129 goto fail_ifa6; 1130 #endif 1131 1132 return 0; 1133 1134 #if IS_ENABLED(CONFIG_IPV6) 1135 fail_ifa6: 1136 #ifdef CONFIG_INET 1137 unregister_inetaddr_notifier(&local->ifa_notifier); 1138 #endif 1139 #endif 1140 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1141 fail_ifa: 1142 #endif 1143 ieee80211_txq_teardown_flows(local); 1144 fail_flows: 1145 rtnl_lock(); 1146 rate_control_deinitialize(local); 1147 ieee80211_remove_interfaces(local); 1148 fail_rate: 1149 rtnl_unlock(); 1150 ieee80211_led_exit(local); 1151 ieee80211_wep_free(local); 1152 destroy_workqueue(local->workqueue); 1153 fail_workqueue: 1154 wiphy_unregister(local->hw.wiphy); 1155 fail_wiphy_register: 1156 if (local->wiphy_ciphers_allocated) 1157 kfree(local->hw.wiphy->cipher_suites); 1158 kfree(local->int_scan_req); 1159 return result; 1160 } 1161 EXPORT_SYMBOL(ieee80211_register_hw); 1162 1163 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1164 { 1165 struct ieee80211_local *local = hw_to_local(hw); 1166 1167 tasklet_kill(&local->tx_pending_tasklet); 1168 tasklet_kill(&local->tasklet); 1169 1170 #ifdef CONFIG_INET 1171 unregister_inetaddr_notifier(&local->ifa_notifier); 1172 #endif 1173 #if IS_ENABLED(CONFIG_IPV6) 1174 unregister_inet6addr_notifier(&local->ifa6_notifier); 1175 #endif 1176 1177 rtnl_lock(); 1178 1179 /* 1180 * At this point, interface list manipulations are fine 1181 * because the driver cannot be handing us frames any 1182 * more and the tasklet is killed. 1183 */ 1184 ieee80211_remove_interfaces(local); 1185 1186 rtnl_unlock(); 1187 1188 cancel_delayed_work_sync(&local->roc_work); 1189 cancel_work_sync(&local->restart_work); 1190 cancel_work_sync(&local->reconfig_filter); 1191 cancel_work_sync(&local->tdls_chsw_work); 1192 flush_work(&local->sched_scan_stopped_work); 1193 flush_work(&local->radar_detected_work); 1194 1195 ieee80211_clear_tx_pending(local); 1196 rate_control_deinitialize(local); 1197 1198 if (skb_queue_len(&local->skb_queue) || 1199 skb_queue_len(&local->skb_queue_unreliable)) 1200 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1201 skb_queue_purge(&local->skb_queue); 1202 skb_queue_purge(&local->skb_queue_unreliable); 1203 skb_queue_purge(&local->skb_queue_tdls_chsw); 1204 ieee80211_txq_teardown_flows(local); 1205 1206 destroy_workqueue(local->workqueue); 1207 wiphy_unregister(local->hw.wiphy); 1208 ieee80211_wep_free(local); 1209 ieee80211_led_exit(local); 1210 kfree(local->int_scan_req); 1211 } 1212 EXPORT_SYMBOL(ieee80211_unregister_hw); 1213 1214 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1215 { 1216 WARN_ONCE(1, "Have pending ack frames!\n"); 1217 kfree_skb(p); 1218 return 0; 1219 } 1220 1221 void ieee80211_free_hw(struct ieee80211_hw *hw) 1222 { 1223 struct ieee80211_local *local = hw_to_local(hw); 1224 1225 mutex_destroy(&local->iflist_mtx); 1226 mutex_destroy(&local->mtx); 1227 1228 if (local->wiphy_ciphers_allocated) 1229 kfree(local->hw.wiphy->cipher_suites); 1230 1231 idr_for_each(&local->ack_status_frames, 1232 ieee80211_free_ack_frame, NULL); 1233 idr_destroy(&local->ack_status_frames); 1234 1235 sta_info_stop(local); 1236 1237 ieee80211_free_led_names(local); 1238 1239 wiphy_free(local->hw.wiphy); 1240 } 1241 EXPORT_SYMBOL(ieee80211_free_hw); 1242 1243 static int __init ieee80211_init(void) 1244 { 1245 struct sk_buff *skb; 1246 int ret; 1247 1248 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1249 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1250 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1251 1252 ret = rc80211_minstrel_init(); 1253 if (ret) 1254 return ret; 1255 1256 ret = rc80211_minstrel_ht_init(); 1257 if (ret) 1258 goto err_minstrel; 1259 1260 ret = ieee80211_iface_init(); 1261 if (ret) 1262 goto err_netdev; 1263 1264 return 0; 1265 err_netdev: 1266 rc80211_minstrel_ht_exit(); 1267 err_minstrel: 1268 rc80211_minstrel_exit(); 1269 1270 return ret; 1271 } 1272 1273 static void __exit ieee80211_exit(void) 1274 { 1275 rc80211_minstrel_ht_exit(); 1276 rc80211_minstrel_exit(); 1277 1278 ieee80211s_stop(); 1279 1280 ieee80211_iface_exit(); 1281 1282 rcu_barrier(); 1283 } 1284 1285 1286 subsys_initcall(ieee80211_init); 1287 module_exit(ieee80211_exit); 1288 1289 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1290 MODULE_LICENSE("GPL"); 1291