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