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 wiphy_ext_feature_set(wiphy, 558 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 559 560 if (!ops->hw_scan) 561 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 562 NL80211_FEATURE_AP_SCAN; 563 564 565 if (!ops->set_key) 566 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 567 568 if (ops->wake_tx_queue) 569 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 570 571 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 572 573 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 574 575 local = wiphy_priv(wiphy); 576 577 if (sta_info_init(local)) 578 goto err_free; 579 580 local->hw.wiphy = wiphy; 581 582 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 583 584 local->ops = ops; 585 local->use_chanctx = use_chanctx; 586 587 /* set up some defaults */ 588 local->hw.queues = 1; 589 local->hw.max_rates = 1; 590 local->hw.max_report_rates = 0; 591 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 592 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 593 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 594 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 595 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 596 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 597 IEEE80211_RADIOTAP_MCS_HAVE_GI | 598 IEEE80211_RADIOTAP_MCS_HAVE_BW; 599 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 600 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 601 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 602 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 603 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 604 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 605 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 606 607 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 608 609 wiphy->extended_capabilities = local->ext_capa; 610 wiphy->extended_capabilities_mask = local->ext_capa; 611 wiphy->extended_capabilities_len = 612 ARRAY_SIZE(local->ext_capa); 613 614 INIT_LIST_HEAD(&local->interfaces); 615 INIT_LIST_HEAD(&local->mon_list); 616 617 __hw_addr_init(&local->mc_list); 618 619 mutex_init(&local->iflist_mtx); 620 mutex_init(&local->mtx); 621 622 mutex_init(&local->key_mtx); 623 spin_lock_init(&local->filter_lock); 624 spin_lock_init(&local->rx_path_lock); 625 spin_lock_init(&local->queue_stop_reason_lock); 626 627 INIT_LIST_HEAD(&local->chanctx_list); 628 mutex_init(&local->chanctx_mtx); 629 630 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 631 632 INIT_WORK(&local->restart_work, ieee80211_restart_work); 633 634 INIT_WORK(&local->radar_detected_work, 635 ieee80211_dfs_radar_detected_work); 636 637 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 638 local->smps_mode = IEEE80211_SMPS_OFF; 639 640 INIT_WORK(&local->dynamic_ps_enable_work, 641 ieee80211_dynamic_ps_enable_work); 642 INIT_WORK(&local->dynamic_ps_disable_work, 643 ieee80211_dynamic_ps_disable_work); 644 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 645 646 INIT_WORK(&local->sched_scan_stopped_work, 647 ieee80211_sched_scan_stopped_work); 648 649 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 650 651 spin_lock_init(&local->ack_status_lock); 652 idr_init(&local->ack_status_frames); 653 654 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 655 skb_queue_head_init(&local->pending[i]); 656 atomic_set(&local->agg_queue_stop[i], 0); 657 } 658 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 659 (unsigned long)local); 660 661 tasklet_init(&local->tasklet, 662 ieee80211_tasklet_handler, 663 (unsigned long) local); 664 665 skb_queue_head_init(&local->skb_queue); 666 skb_queue_head_init(&local->skb_queue_unreliable); 667 skb_queue_head_init(&local->skb_queue_tdls_chsw); 668 669 ieee80211_alloc_led_names(local); 670 671 ieee80211_roc_setup(local); 672 673 local->hw.radiotap_timestamp.units_pos = -1; 674 local->hw.radiotap_timestamp.accuracy = -1; 675 676 return &local->hw; 677 err_free: 678 wiphy_free(wiphy); 679 return NULL; 680 } 681 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 682 683 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 684 { 685 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 686 IS_ERR(local->wep_rx_tfm)); 687 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 688 int n_suites = 0, r = 0, w = 0; 689 u32 *suites; 690 static const u32 cipher_suites[] = { 691 /* keep WEP first, it may be removed below */ 692 WLAN_CIPHER_SUITE_WEP40, 693 WLAN_CIPHER_SUITE_WEP104, 694 WLAN_CIPHER_SUITE_TKIP, 695 WLAN_CIPHER_SUITE_CCMP, 696 WLAN_CIPHER_SUITE_CCMP_256, 697 WLAN_CIPHER_SUITE_GCMP, 698 WLAN_CIPHER_SUITE_GCMP_256, 699 700 /* keep last -- depends on hw flags! */ 701 WLAN_CIPHER_SUITE_AES_CMAC, 702 WLAN_CIPHER_SUITE_BIP_CMAC_256, 703 WLAN_CIPHER_SUITE_BIP_GMAC_128, 704 WLAN_CIPHER_SUITE_BIP_GMAC_256, 705 }; 706 707 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 708 local->hw.wiphy->cipher_suites) { 709 /* If the driver advertises, or doesn't support SW crypto, 710 * we only need to remove WEP if necessary. 711 */ 712 if (have_wep) 713 return 0; 714 715 /* well if it has _no_ ciphers ... fine */ 716 if (!local->hw.wiphy->n_cipher_suites) 717 return 0; 718 719 /* Driver provides cipher suites, but we need to exclude WEP */ 720 suites = kmemdup(local->hw.wiphy->cipher_suites, 721 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 722 GFP_KERNEL); 723 if (!suites) 724 return -ENOMEM; 725 726 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 727 u32 suite = local->hw.wiphy->cipher_suites[r]; 728 729 if (suite == WLAN_CIPHER_SUITE_WEP40 || 730 suite == WLAN_CIPHER_SUITE_WEP104) 731 continue; 732 suites[w++] = suite; 733 } 734 } else if (!local->hw.cipher_schemes) { 735 /* If the driver doesn't have cipher schemes, there's nothing 736 * else to do other than assign the (software supported and 737 * perhaps offloaded) cipher suites. 738 */ 739 local->hw.wiphy->cipher_suites = cipher_suites; 740 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 741 742 if (!have_mfp) 743 local->hw.wiphy->n_cipher_suites -= 4; 744 745 if (!have_wep) { 746 local->hw.wiphy->cipher_suites += 2; 747 local->hw.wiphy->n_cipher_suites -= 2; 748 } 749 750 /* not dynamically allocated, so just return */ 751 return 0; 752 } else { 753 const struct ieee80211_cipher_scheme *cs; 754 755 cs = local->hw.cipher_schemes; 756 757 /* Driver specifies cipher schemes only (but not cipher suites 758 * including the schemes) 759 * 760 * We start counting ciphers defined by schemes, TKIP, CCMP, 761 * CCMP-256, GCMP, and GCMP-256 762 */ 763 n_suites = local->hw.n_cipher_schemes + 5; 764 765 /* check if we have WEP40 and WEP104 */ 766 if (have_wep) 767 n_suites += 2; 768 769 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 770 * BIP-GMAC-256 771 */ 772 if (have_mfp) 773 n_suites += 4; 774 775 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 776 if (!suites) 777 return -ENOMEM; 778 779 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 780 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 781 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 782 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 783 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 784 785 if (have_wep) { 786 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 787 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 788 } 789 790 if (have_mfp) { 791 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 792 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 793 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 794 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 795 } 796 797 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 798 suites[w++] = cs[r].cipher; 799 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 800 kfree(suites); 801 return -EINVAL; 802 } 803 } 804 } 805 806 local->hw.wiphy->cipher_suites = suites; 807 local->hw.wiphy->n_cipher_suites = w; 808 local->wiphy_ciphers_allocated = true; 809 810 return 0; 811 } 812 813 int ieee80211_register_hw(struct ieee80211_hw *hw) 814 { 815 struct ieee80211_local *local = hw_to_local(hw); 816 int result, i; 817 enum nl80211_band band; 818 int channels, max_bitrates; 819 bool supp_ht, supp_vht; 820 netdev_features_t feature_whitelist; 821 struct cfg80211_chan_def dflt_chandef = {}; 822 823 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 824 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 825 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 826 return -EINVAL; 827 828 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 829 (!local->ops->tdls_channel_switch || 830 !local->ops->tdls_cancel_channel_switch || 831 !local->ops->tdls_recv_channel_switch)) 832 return -EOPNOTSUPP; 833 834 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 835 !local->ops->set_frag_threshold)) 836 return -EINVAL; 837 838 if (WARN_ON(local->hw.wiphy->interface_modes & 839 BIT(NL80211_IFTYPE_NAN) && 840 (!local->ops->start_nan || !local->ops->stop_nan))) 841 return -EINVAL; 842 843 #ifdef CONFIG_PM 844 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 845 return -EINVAL; 846 #endif 847 848 if (!local->use_chanctx) { 849 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 850 const struct ieee80211_iface_combination *comb; 851 852 comb = &local->hw.wiphy->iface_combinations[i]; 853 854 if (comb->num_different_channels > 1) 855 return -EINVAL; 856 } 857 } else { 858 /* 859 * WDS is currently prohibited when channel contexts are used 860 * because there's no clear definition of which channel WDS 861 * type interfaces use 862 */ 863 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 864 return -EINVAL; 865 866 /* DFS is not supported with multi-channel combinations yet */ 867 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 868 const struct ieee80211_iface_combination *comb; 869 870 comb = &local->hw.wiphy->iface_combinations[i]; 871 872 if (comb->radar_detect_widths && 873 comb->num_different_channels > 1) 874 return -EINVAL; 875 } 876 } 877 878 /* Only HW csum features are currently compatible with mac80211 */ 879 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 880 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 881 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM; 882 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 883 return -EINVAL; 884 885 if (hw->max_report_rates == 0) 886 hw->max_report_rates = hw->max_rates; 887 888 local->rx_chains = 1; 889 890 /* 891 * generic code guarantees at least one band, 892 * set this very early because much code assumes 893 * that hw.conf.channel is assigned 894 */ 895 channels = 0; 896 max_bitrates = 0; 897 supp_ht = false; 898 supp_vht = false; 899 for (band = 0; band < NUM_NL80211_BANDS; band++) { 900 struct ieee80211_supported_band *sband; 901 902 sband = local->hw.wiphy->bands[band]; 903 if (!sband) 904 continue; 905 906 if (!dflt_chandef.chan) { 907 cfg80211_chandef_create(&dflt_chandef, 908 &sband->channels[0], 909 NL80211_CHAN_NO_HT); 910 /* init channel we're on */ 911 if (!local->use_chanctx && !local->_oper_chandef.chan) { 912 local->hw.conf.chandef = dflt_chandef; 913 local->_oper_chandef = dflt_chandef; 914 } 915 local->monitor_chandef = dflt_chandef; 916 } 917 918 channels += sband->n_channels; 919 920 if (max_bitrates < sband->n_bitrates) 921 max_bitrates = sband->n_bitrates; 922 supp_ht = supp_ht || sband->ht_cap.ht_supported; 923 supp_vht = supp_vht || sband->vht_cap.vht_supported; 924 925 if (!sband->ht_cap.ht_supported) 926 continue; 927 928 /* TODO: consider VHT for RX chains, hopefully it's the same */ 929 local->rx_chains = 930 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 931 local->rx_chains); 932 933 /* no need to mask, SM_PS_DISABLED has all bits set */ 934 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 935 IEEE80211_HT_CAP_SM_PS_SHIFT; 936 } 937 938 /* if low-level driver supports AP, we also support VLAN. 939 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 940 * based on their support to transmit SW encrypted packets. 941 */ 942 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 943 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 944 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 945 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 946 } 947 948 /* mac80211 always supports monitor */ 949 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 950 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 951 952 /* mac80211 doesn't support more than one IBSS interface right now */ 953 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 954 const struct ieee80211_iface_combination *c; 955 int j; 956 957 c = &hw->wiphy->iface_combinations[i]; 958 959 for (j = 0; j < c->n_limits; j++) 960 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 961 c->limits[j].max > 1) 962 return -EINVAL; 963 } 964 965 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 966 sizeof(void *) * channels, GFP_KERNEL); 967 if (!local->int_scan_req) 968 return -ENOMEM; 969 970 for (band = 0; band < NUM_NL80211_BANDS; band++) { 971 if (!local->hw.wiphy->bands[band]) 972 continue; 973 local->int_scan_req->rates[band] = (u32) -1; 974 } 975 976 #ifndef CONFIG_MAC80211_MESH 977 /* mesh depends on Kconfig, but drivers should set it if they want */ 978 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 979 #endif 980 981 /* if the underlying driver supports mesh, mac80211 will (at least) 982 * provide routing of mesh authentication frames to userspace */ 983 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 984 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 985 986 /* mac80211 supports control port protocol changing */ 987 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 988 989 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 990 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 991 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 992 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 993 if (hw->max_signal <= 0) { 994 result = -EINVAL; 995 goto fail_wiphy_register; 996 } 997 } 998 999 /* 1000 * Calculate scan IE length -- we need this to alloc 1001 * memory and to subtract from the driver limit. It 1002 * includes the DS Params, (extended) supported rates, and HT 1003 * information -- SSID is the driver's responsibility. 1004 */ 1005 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1006 3 /* DS Params */; 1007 if (supp_ht) 1008 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1009 1010 if (supp_vht) 1011 local->scan_ies_len += 1012 2 + sizeof(struct ieee80211_vht_cap); 1013 1014 if (!local->ops->hw_scan) { 1015 /* For hw_scan, driver needs to set these up. */ 1016 local->hw.wiphy->max_scan_ssids = 4; 1017 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1018 } 1019 1020 /* 1021 * If the driver supports any scan IEs, then assume the 1022 * limit includes the IEs mac80211 will add, otherwise 1023 * leave it at zero and let the driver sort it out; we 1024 * still pass our IEs to the driver but userspace will 1025 * not be allowed to in that case. 1026 */ 1027 if (local->hw.wiphy->max_scan_ie_len) 1028 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1029 1030 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1031 local->hw.n_cipher_schemes)); 1032 1033 result = ieee80211_init_cipher_suites(local); 1034 if (result < 0) 1035 goto fail_wiphy_register; 1036 1037 if (!local->ops->remain_on_channel) 1038 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1039 1040 /* mac80211 based drivers don't support internal TDLS setup */ 1041 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1042 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1043 1044 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1045 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1046 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1047 1048 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1049 1050 result = wiphy_register(local->hw.wiphy); 1051 if (result < 0) 1052 goto fail_wiphy_register; 1053 1054 /* 1055 * We use the number of queues for feature tests (QoS, HT) internally 1056 * so restrict them appropriately. 1057 */ 1058 if (hw->queues > IEEE80211_MAX_QUEUES) 1059 hw->queues = IEEE80211_MAX_QUEUES; 1060 1061 local->workqueue = 1062 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1063 if (!local->workqueue) { 1064 result = -ENOMEM; 1065 goto fail_workqueue; 1066 } 1067 1068 /* 1069 * The hardware needs headroom for sending the frame, 1070 * and we need some headroom for passing the frame to monitor 1071 * interfaces, but never both at the same time. 1072 */ 1073 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1074 IEEE80211_TX_STATUS_HEADROOM); 1075 1076 debugfs_hw_add(local); 1077 1078 /* 1079 * if the driver doesn't specify a max listen interval we 1080 * use 5 which should be a safe default 1081 */ 1082 if (local->hw.max_listen_interval == 0) 1083 local->hw.max_listen_interval = 5; 1084 1085 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1086 1087 local->dynamic_ps_forced_timeout = -1; 1088 1089 if (!local->hw.max_nan_de_entries) 1090 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1091 1092 result = ieee80211_wep_init(local); 1093 if (result < 0) 1094 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1095 result); 1096 1097 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1098 1099 ieee80211_led_init(local); 1100 1101 result = ieee80211_txq_setup_flows(local); 1102 if (result) 1103 goto fail_flows; 1104 1105 rtnl_lock(); 1106 1107 result = ieee80211_init_rate_ctrl_alg(local, 1108 hw->rate_control_algorithm); 1109 if (result < 0) { 1110 wiphy_debug(local->hw.wiphy, 1111 "Failed to initialize rate control algorithm\n"); 1112 goto fail_rate; 1113 } 1114 1115 /* add one default STA interface if supported */ 1116 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1117 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1118 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1119 NL80211_IFTYPE_STATION, NULL); 1120 if (result) 1121 wiphy_warn(local->hw.wiphy, 1122 "Failed to add default virtual iface\n"); 1123 } 1124 1125 rtnl_unlock(); 1126 1127 #ifdef CONFIG_INET 1128 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1129 result = register_inetaddr_notifier(&local->ifa_notifier); 1130 if (result) 1131 goto fail_ifa; 1132 #endif 1133 1134 #if IS_ENABLED(CONFIG_IPV6) 1135 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1136 result = register_inet6addr_notifier(&local->ifa6_notifier); 1137 if (result) 1138 goto fail_ifa6; 1139 #endif 1140 1141 return 0; 1142 1143 #if IS_ENABLED(CONFIG_IPV6) 1144 fail_ifa6: 1145 #ifdef CONFIG_INET 1146 unregister_inetaddr_notifier(&local->ifa_notifier); 1147 #endif 1148 #endif 1149 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1150 fail_ifa: 1151 #endif 1152 rtnl_lock(); 1153 rate_control_deinitialize(local); 1154 ieee80211_remove_interfaces(local); 1155 fail_rate: 1156 rtnl_unlock(); 1157 ieee80211_led_exit(local); 1158 ieee80211_wep_free(local); 1159 ieee80211_txq_teardown_flows(local); 1160 fail_flows: 1161 destroy_workqueue(local->workqueue); 1162 fail_workqueue: 1163 wiphy_unregister(local->hw.wiphy); 1164 fail_wiphy_register: 1165 if (local->wiphy_ciphers_allocated) 1166 kfree(local->hw.wiphy->cipher_suites); 1167 kfree(local->int_scan_req); 1168 return result; 1169 } 1170 EXPORT_SYMBOL(ieee80211_register_hw); 1171 1172 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1173 { 1174 struct ieee80211_local *local = hw_to_local(hw); 1175 1176 tasklet_kill(&local->tx_pending_tasklet); 1177 tasklet_kill(&local->tasklet); 1178 1179 #ifdef CONFIG_INET 1180 unregister_inetaddr_notifier(&local->ifa_notifier); 1181 #endif 1182 #if IS_ENABLED(CONFIG_IPV6) 1183 unregister_inet6addr_notifier(&local->ifa6_notifier); 1184 #endif 1185 1186 rtnl_lock(); 1187 1188 /* 1189 * At this point, interface list manipulations are fine 1190 * because the driver cannot be handing us frames any 1191 * more and the tasklet is killed. 1192 */ 1193 ieee80211_remove_interfaces(local); 1194 1195 rtnl_unlock(); 1196 1197 cancel_delayed_work_sync(&local->roc_work); 1198 cancel_work_sync(&local->restart_work); 1199 cancel_work_sync(&local->reconfig_filter); 1200 cancel_work_sync(&local->tdls_chsw_work); 1201 flush_work(&local->sched_scan_stopped_work); 1202 flush_work(&local->radar_detected_work); 1203 1204 ieee80211_clear_tx_pending(local); 1205 rate_control_deinitialize(local); 1206 1207 if (skb_queue_len(&local->skb_queue) || 1208 skb_queue_len(&local->skb_queue_unreliable)) 1209 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1210 skb_queue_purge(&local->skb_queue); 1211 skb_queue_purge(&local->skb_queue_unreliable); 1212 skb_queue_purge(&local->skb_queue_tdls_chsw); 1213 ieee80211_txq_teardown_flows(local); 1214 1215 destroy_workqueue(local->workqueue); 1216 wiphy_unregister(local->hw.wiphy); 1217 ieee80211_wep_free(local); 1218 ieee80211_led_exit(local); 1219 kfree(local->int_scan_req); 1220 } 1221 EXPORT_SYMBOL(ieee80211_unregister_hw); 1222 1223 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1224 { 1225 WARN_ONCE(1, "Have pending ack frames!\n"); 1226 kfree_skb(p); 1227 return 0; 1228 } 1229 1230 void ieee80211_free_hw(struct ieee80211_hw *hw) 1231 { 1232 struct ieee80211_local *local = hw_to_local(hw); 1233 1234 mutex_destroy(&local->iflist_mtx); 1235 mutex_destroy(&local->mtx); 1236 1237 if (local->wiphy_ciphers_allocated) 1238 kfree(local->hw.wiphy->cipher_suites); 1239 1240 idr_for_each(&local->ack_status_frames, 1241 ieee80211_free_ack_frame, NULL); 1242 idr_destroy(&local->ack_status_frames); 1243 1244 sta_info_stop(local); 1245 1246 ieee80211_free_led_names(local); 1247 1248 wiphy_free(local->hw.wiphy); 1249 } 1250 EXPORT_SYMBOL(ieee80211_free_hw); 1251 1252 static int __init ieee80211_init(void) 1253 { 1254 struct sk_buff *skb; 1255 int ret; 1256 1257 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1258 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1259 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1260 1261 ret = rc80211_minstrel_init(); 1262 if (ret) 1263 return ret; 1264 1265 ret = rc80211_minstrel_ht_init(); 1266 if (ret) 1267 goto err_minstrel; 1268 1269 ret = ieee80211_iface_init(); 1270 if (ret) 1271 goto err_netdev; 1272 1273 return 0; 1274 err_netdev: 1275 rc80211_minstrel_ht_exit(); 1276 err_minstrel: 1277 rc80211_minstrel_exit(); 1278 1279 return ret; 1280 } 1281 1282 static void __exit ieee80211_exit(void) 1283 { 1284 rc80211_minstrel_ht_exit(); 1285 rc80211_minstrel_exit(); 1286 1287 ieee80211s_stop(); 1288 1289 ieee80211_iface_exit(); 1290 1291 rcu_barrier(); 1292 } 1293 1294 1295 subsys_initcall(ieee80211_init); 1296 module_exit(ieee80211_exit); 1297 1298 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1299 MODULE_LICENSE("GPL"); 1300