main.c revision 2b2c009ecf71f4c66ff8420b63dddbc9737e04e3
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 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <net/mac80211.h> 12#include <linux/module.h> 13#include <linux/init.h> 14#include <linux/netdevice.h> 15#include <linux/types.h> 16#include <linux/slab.h> 17#include <linux/skbuff.h> 18#include <linux/etherdevice.h> 19#include <linux/if_arp.h> 20#include <linux/rtnetlink.h> 21#include <linux/bitmap.h> 22#include <linux/pm_qos_params.h> 23#include <net/net_namespace.h> 24#include <net/cfg80211.h> 25 26#include "ieee80211_i.h" 27#include "driver-ops.h" 28#include "rate.h" 29#include "mesh.h" 30#include "wep.h" 31#include "led.h" 32#include "cfg.h" 33#include "debugfs.h" 34 35 36bool ieee80211_disable_40mhz_24ghz; 37module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); 38MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, 39 "Disable 40MHz support in the 2.4GHz band"); 40 41void ieee80211_configure_filter(struct ieee80211_local *local) 42{ 43 u64 mc; 44 unsigned int changed_flags; 45 unsigned int new_flags = 0; 46 47 if (atomic_read(&local->iff_promiscs)) 48 new_flags |= FIF_PROMISC_IN_BSS; 49 50 if (atomic_read(&local->iff_allmultis)) 51 new_flags |= FIF_ALLMULTI; 52 53 if (local->monitors || local->scanning) 54 new_flags |= FIF_BCN_PRBRESP_PROMISC; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85} 86 87static void ieee80211_reconfig_filter(struct work_struct *work) 88{ 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93} 94 95int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 96{ 97 struct ieee80211_channel *chan, *scan_chan; 98 int ret = 0; 99 int power; 100 enum nl80211_channel_type channel_type; 101 102 might_sleep(); 103 104 scan_chan = local->scan_channel; 105 106 if (scan_chan) { 107 chan = scan_chan; 108 channel_type = NL80211_CHAN_NO_HT; 109 } else if (local->tmp_channel) { 110 chan = scan_chan = local->tmp_channel; 111 channel_type = local->tmp_channel_type; 112 } else { 113 chan = local->oper_channel; 114 channel_type = local->_oper_channel_type; 115 } 116 117 if (chan != local->hw.conf.channel || 118 channel_type != local->hw.conf.channel_type) { 119 local->hw.conf.channel = chan; 120 local->hw.conf.channel_type = channel_type; 121 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 122 } 123 124 if (!conf_is_ht(&local->hw.conf)) { 125 /* 126 * mac80211.h documents that this is only valid 127 * when the channel is set to an HT type, and 128 * that otherwise STATIC is used. 129 */ 130 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 131 } else if (local->hw.conf.smps_mode != local->smps_mode) { 132 local->hw.conf.smps_mode = local->smps_mode; 133 changed |= IEEE80211_CONF_CHANGE_SMPS; 134 } 135 136 if (scan_chan) 137 power = chan->max_power; 138 else 139 power = local->power_constr_level ? 140 (chan->max_power - local->power_constr_level) : 141 chan->max_power; 142 143 if (local->user_power_level >= 0) 144 power = min(power, local->user_power_level); 145 146 if (local->hw.conf.power_level != power) { 147 changed |= IEEE80211_CONF_CHANGE_POWER; 148 local->hw.conf.power_level = power; 149 } 150 151 if (changed && local->open_count) { 152 ret = drv_config(local, changed); 153 /* 154 * Goal: 155 * HW reconfiguration should never fail, the driver has told 156 * us what it can support so it should live up to that promise. 157 * 158 * Current status: 159 * rfkill is not integrated with mac80211 and a 160 * configuration command can thus fail if hardware rfkill 161 * is enabled 162 * 163 * FIXME: integrate rfkill with mac80211 and then add this 164 * WARN_ON() back 165 * 166 */ 167 /* WARN_ON(ret); */ 168 } 169 170 return ret; 171} 172 173void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 174 u32 changed) 175{ 176 struct ieee80211_local *local = sdata->local; 177 static const u8 zero[ETH_ALEN] = { 0 }; 178 179 if (!changed) 180 return; 181 182 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 183 /* 184 * While not associated, claim a BSSID of all-zeroes 185 * so that drivers don't do any weird things with the 186 * BSSID at that time. 187 */ 188 if (sdata->vif.bss_conf.assoc) 189 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 190 else 191 sdata->vif.bss_conf.bssid = zero; 192 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 193 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 194 else if (sdata->vif.type == NL80211_IFTYPE_AP) 195 sdata->vif.bss_conf.bssid = sdata->vif.addr; 196 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 197 sdata->vif.bss_conf.bssid = zero; 198 } else { 199 WARN_ON(1); 200 return; 201 } 202 203 switch (sdata->vif.type) { 204 case NL80211_IFTYPE_AP: 205 case NL80211_IFTYPE_ADHOC: 206 case NL80211_IFTYPE_MESH_POINT: 207 break; 208 default: 209 /* do not warn to simplify caller in scan.c */ 210 changed &= ~BSS_CHANGED_BEACON_ENABLED; 211 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 212 return; 213 break; 214 } 215 216 if (changed & BSS_CHANGED_BEACON_ENABLED) { 217 if (local->quiescing || !ieee80211_sdata_running(sdata) || 218 test_bit(SCAN_SW_SCANNING, &local->scanning)) { 219 sdata->vif.bss_conf.enable_beacon = false; 220 } else { 221 /* 222 * Beacon should be enabled, but AP mode must 223 * check whether there is a beacon configured. 224 */ 225 switch (sdata->vif.type) { 226 case NL80211_IFTYPE_AP: 227 sdata->vif.bss_conf.enable_beacon = 228 !!sdata->u.ap.beacon; 229 break; 230 case NL80211_IFTYPE_ADHOC: 231 sdata->vif.bss_conf.enable_beacon = 232 !!sdata->u.ibss.presp; 233 break; 234 case NL80211_IFTYPE_MESH_POINT: 235 sdata->vif.bss_conf.enable_beacon = true; 236 break; 237 default: 238 /* not reached */ 239 WARN_ON(1); 240 break; 241 } 242 } 243 } 244 245 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 246} 247 248u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 249{ 250 sdata->vif.bss_conf.use_cts_prot = false; 251 sdata->vif.bss_conf.use_short_preamble = false; 252 sdata->vif.bss_conf.use_short_slot = false; 253 return BSS_CHANGED_ERP_CTS_PROT | 254 BSS_CHANGED_ERP_PREAMBLE | 255 BSS_CHANGED_ERP_SLOT; 256} 257 258static void ieee80211_tasklet_handler(unsigned long data) 259{ 260 struct ieee80211_local *local = (struct ieee80211_local *) data; 261 struct sk_buff *skb; 262 struct ieee80211_ra_tid *ra_tid; 263 264 while ((skb = skb_dequeue(&local->skb_queue)) || 265 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 266 switch (skb->pkt_type) { 267 case IEEE80211_RX_MSG: 268 /* Clear skb->pkt_type in order to not confuse kernel 269 * netstack. */ 270 skb->pkt_type = 0; 271 ieee80211_rx(local_to_hw(local), skb); 272 break; 273 case IEEE80211_TX_STATUS_MSG: 274 skb->pkt_type = 0; 275 ieee80211_tx_status(local_to_hw(local), skb); 276 break; 277 case IEEE80211_DELBA_MSG: 278 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 279 ieee80211_stop_tx_ba_cb(ra_tid->vif, ra_tid->ra, 280 ra_tid->tid); 281 dev_kfree_skb(skb); 282 break; 283 case IEEE80211_ADDBA_MSG: 284 ra_tid = (struct ieee80211_ra_tid *) &skb->cb; 285 ieee80211_start_tx_ba_cb(ra_tid->vif, ra_tid->ra, 286 ra_tid->tid); 287 dev_kfree_skb(skb); 288 break ; 289 default: 290 WARN(1, "mac80211: Packet is of unknown type %d\n", 291 skb->pkt_type); 292 dev_kfree_skb(skb); 293 break; 294 } 295 } 296} 297 298static void ieee80211_restart_work(struct work_struct *work) 299{ 300 struct ieee80211_local *local = 301 container_of(work, struct ieee80211_local, restart_work); 302 303 rtnl_lock(); 304 ieee80211_reconfig(local); 305 rtnl_unlock(); 306} 307 308void ieee80211_restart_hw(struct ieee80211_hw *hw) 309{ 310 struct ieee80211_local *local = hw_to_local(hw); 311 312 trace_api_restart_hw(local); 313 314 /* use this reason, __ieee80211_resume will unblock it */ 315 ieee80211_stop_queues_by_reason(hw, 316 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 317 318 schedule_work(&local->restart_work); 319} 320EXPORT_SYMBOL(ieee80211_restart_hw); 321 322static void ieee80211_recalc_smps_work(struct work_struct *work) 323{ 324 struct ieee80211_local *local = 325 container_of(work, struct ieee80211_local, recalc_smps); 326 327 mutex_lock(&local->iflist_mtx); 328 ieee80211_recalc_smps(local, NULL); 329 mutex_unlock(&local->iflist_mtx); 330} 331 332int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata) 333{ 334 struct in_device *idev; 335 int ret = 0; 336 337 BUG_ON(!sdata); 338 ASSERT_RTNL(); 339 340 idev = sdata->dev->ip_ptr; 341 if (!idev) 342 return 0; 343 344 ret = drv_configure_arp_filter(sdata->local, &sdata->vif, 345 idev->ifa_list); 346 return ret; 347} 348 349static int ieee80211_ifa_changed(struct notifier_block *nb, 350 unsigned long data, void *arg) 351{ 352 struct in_ifaddr *ifa = arg; 353 struct ieee80211_local *local = 354 container_of(nb, struct ieee80211_local, 355 ifa_notifier); 356 struct net_device *ndev = ifa->ifa_dev->dev; 357 struct wireless_dev *wdev = ndev->ieee80211_ptr; 358 struct ieee80211_sub_if_data *sdata; 359 struct ieee80211_if_managed *ifmgd; 360 361 /* Make sure it's our interface that got changed */ 362 if (!wdev) 363 return NOTIFY_DONE; 364 365 if (wdev->wiphy != local->hw.wiphy) 366 return NOTIFY_DONE; 367 368 /* We are concerned about IP addresses only when associated */ 369 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 370 371 /* ARP filtering is only supported in managed mode */ 372 if (sdata->vif.type != NL80211_IFTYPE_STATION) 373 return NOTIFY_DONE; 374 375 ifmgd = &sdata->u.mgd; 376 mutex_lock(&ifmgd->mtx); 377 if (ifmgd->associated) 378 ieee80211_set_arp_filter(sdata); 379 mutex_unlock(&ifmgd->mtx); 380 381 return NOTIFY_DONE; 382} 383 384struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 385 const struct ieee80211_ops *ops) 386{ 387 struct ieee80211_local *local; 388 int priv_size, i; 389 struct wiphy *wiphy; 390 391 /* Ensure 32-byte alignment of our private data and hw private data. 392 * We use the wiphy priv data for both our ieee80211_local and for 393 * the driver's private data 394 * 395 * In memory it'll be like this: 396 * 397 * +-------------------------+ 398 * | struct wiphy | 399 * +-------------------------+ 400 * | struct ieee80211_local | 401 * +-------------------------+ 402 * | driver's private data | 403 * +-------------------------+ 404 * 405 */ 406 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 407 408 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 409 410 if (!wiphy) 411 return NULL; 412 413 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 414 WIPHY_FLAG_4ADDR_AP | 415 WIPHY_FLAG_4ADDR_STATION; 416 wiphy->privid = mac80211_wiphy_privid; 417 418 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 419 420 local = wiphy_priv(wiphy); 421 422 local->hw.wiphy = wiphy; 423 424 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 425 426 BUG_ON(!ops->tx); 427 BUG_ON(!ops->start); 428 BUG_ON(!ops->stop); 429 BUG_ON(!ops->config); 430 BUG_ON(!ops->add_interface); 431 BUG_ON(!ops->remove_interface); 432 BUG_ON(!ops->configure_filter); 433 local->ops = ops; 434 435 /* set up some defaults */ 436 local->hw.queues = 1; 437 local->hw.max_rates = 1; 438 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 439 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 440 local->user_power_level = -1; 441 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 442 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 443 444 INIT_LIST_HEAD(&local->interfaces); 445 446 __hw_addr_init(&local->mc_list); 447 448 mutex_init(&local->iflist_mtx); 449 mutex_init(&local->scan_mtx); 450 451 spin_lock_init(&local->key_lock); 452 spin_lock_init(&local->filter_lock); 453 spin_lock_init(&local->queue_stop_reason_lock); 454 455 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 456 457 ieee80211_work_init(local); 458 459 INIT_WORK(&local->restart_work, ieee80211_restart_work); 460 461 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 462 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 463 local->smps_mode = IEEE80211_SMPS_OFF; 464 465 INIT_WORK(&local->dynamic_ps_enable_work, 466 ieee80211_dynamic_ps_enable_work); 467 INIT_WORK(&local->dynamic_ps_disable_work, 468 ieee80211_dynamic_ps_disable_work); 469 setup_timer(&local->dynamic_ps_timer, 470 ieee80211_dynamic_ps_timer, (unsigned long) local); 471 472 sta_info_init(local); 473 474 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) 475 skb_queue_head_init(&local->pending[i]); 476 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 477 (unsigned long)local); 478 479 tasklet_init(&local->tasklet, 480 ieee80211_tasklet_handler, 481 (unsigned long) local); 482 483 skb_queue_head_init(&local->skb_queue); 484 skb_queue_head_init(&local->skb_queue_unreliable); 485 486 spin_lock_init(&local->ampdu_lock); 487 488 return local_to_hw(local); 489} 490EXPORT_SYMBOL(ieee80211_alloc_hw); 491 492int ieee80211_register_hw(struct ieee80211_hw *hw) 493{ 494 struct ieee80211_local *local = hw_to_local(hw); 495 int result; 496 enum ieee80211_band band; 497 int channels, max_bitrates; 498 bool supp_ht; 499 static const u32 cipher_suites[] = { 500 WLAN_CIPHER_SUITE_WEP40, 501 WLAN_CIPHER_SUITE_WEP104, 502 WLAN_CIPHER_SUITE_TKIP, 503 WLAN_CIPHER_SUITE_CCMP, 504 505 /* keep last -- depends on hw flags! */ 506 WLAN_CIPHER_SUITE_AES_CMAC 507 }; 508 509 /* 510 * generic code guarantees at least one band, 511 * set this very early because much code assumes 512 * that hw.conf.channel is assigned 513 */ 514 channels = 0; 515 max_bitrates = 0; 516 supp_ht = false; 517 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 518 struct ieee80211_supported_band *sband; 519 520 sband = local->hw.wiphy->bands[band]; 521 if (!sband) 522 continue; 523 if (!local->oper_channel) { 524 /* init channel we're on */ 525 local->hw.conf.channel = 526 local->oper_channel = &sband->channels[0]; 527 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 528 } 529 channels += sband->n_channels; 530 531 if (max_bitrates < sband->n_bitrates) 532 max_bitrates = sband->n_bitrates; 533 supp_ht = supp_ht || sband->ht_cap.ht_supported; 534 } 535 536 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 537 sizeof(void *) * channels, GFP_KERNEL); 538 if (!local->int_scan_req) 539 return -ENOMEM; 540 541 /* if low-level driver supports AP, we also support VLAN */ 542 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 543 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 544 545 /* mac80211 always supports monitor */ 546 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 547 548 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 549 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 550 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 551 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 552 553 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 554 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 555 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 556 557 /* 558 * Calculate scan IE length -- we need this to alloc 559 * memory and to subtract from the driver limit. It 560 * includes the (extended) supported rates and HT 561 * information -- SSID is the driver's responsibility. 562 */ 563 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 564 if (supp_ht) 565 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 566 567 if (!local->ops->hw_scan) { 568 /* For hw_scan, driver needs to set these up. */ 569 local->hw.wiphy->max_scan_ssids = 4; 570 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 571 } 572 573 /* 574 * If the driver supports any scan IEs, then assume the 575 * limit includes the IEs mac80211 will add, otherwise 576 * leave it at zero and let the driver sort it out; we 577 * still pass our IEs to the driver but userspace will 578 * not be allowed to in that case. 579 */ 580 if (local->hw.wiphy->max_scan_ie_len) 581 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 582 583 local->hw.wiphy->cipher_suites = cipher_suites; 584 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 585 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 586 local->hw.wiphy->n_cipher_suites--; 587 588 result = wiphy_register(local->hw.wiphy); 589 if (result < 0) 590 goto fail_wiphy_register; 591 592 /* 593 * We use the number of queues for feature tests (QoS, HT) internally 594 * so restrict them appropriately. 595 */ 596 if (hw->queues > IEEE80211_MAX_QUEUES) 597 hw->queues = IEEE80211_MAX_QUEUES; 598 599 local->workqueue = 600 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 601 if (!local->workqueue) { 602 result = -ENOMEM; 603 goto fail_workqueue; 604 } 605 606 /* 607 * The hardware needs headroom for sending the frame, 608 * and we need some headroom for passing the frame to monitor 609 * interfaces, but never both at the same time. 610 */ 611 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 612 sizeof(struct ieee80211_tx_status_rtap_hdr)); 613 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 614 sizeof(struct ieee80211_tx_status_rtap_hdr)); 615 616 debugfs_hw_add(local); 617 618 /* 619 * if the driver doesn't specify a max listen interval we 620 * use 5 which should be a safe default 621 */ 622 if (local->hw.max_listen_interval == 0) 623 local->hw.max_listen_interval = 5; 624 625 local->hw.conf.listen_interval = local->hw.max_listen_interval; 626 627 local->hw.conf.dynamic_ps_forced_timeout = -1; 628 629 result = sta_info_start(local); 630 if (result < 0) 631 goto fail_sta_info; 632 633 result = ieee80211_wep_init(local); 634 if (result < 0) { 635 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", 636 wiphy_name(local->hw.wiphy), result); 637 goto fail_wep; 638 } 639 640 rtnl_lock(); 641 642 result = ieee80211_init_rate_ctrl_alg(local, 643 hw->rate_control_algorithm); 644 if (result < 0) { 645 printk(KERN_DEBUG "%s: Failed to initialize rate control " 646 "algorithm\n", wiphy_name(local->hw.wiphy)); 647 goto fail_rate; 648 } 649 650 /* add one default STA interface if supported */ 651 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 652 result = ieee80211_if_add(local, "wlan%d", NULL, 653 NL80211_IFTYPE_STATION, NULL); 654 if (result) 655 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 656 wiphy_name(local->hw.wiphy)); 657 } 658 659 rtnl_unlock(); 660 661 ieee80211_led_init(local); 662 663 local->network_latency_notifier.notifier_call = 664 ieee80211_max_network_latency; 665 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 666 &local->network_latency_notifier); 667 if (result) { 668 rtnl_lock(); 669 goto fail_pm_qos; 670 } 671 672 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 673 result = register_inetaddr_notifier(&local->ifa_notifier); 674 if (result) 675 goto fail_ifa; 676 677 return 0; 678 679 fail_ifa: 680 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 681 &local->network_latency_notifier); 682 rtnl_lock(); 683 fail_pm_qos: 684 ieee80211_led_exit(local); 685 ieee80211_remove_interfaces(local); 686 fail_rate: 687 rtnl_unlock(); 688 ieee80211_wep_free(local); 689 fail_wep: 690 sta_info_stop(local); 691 fail_sta_info: 692 destroy_workqueue(local->workqueue); 693 fail_workqueue: 694 wiphy_unregister(local->hw.wiphy); 695 fail_wiphy_register: 696 kfree(local->int_scan_req); 697 return result; 698} 699EXPORT_SYMBOL(ieee80211_register_hw); 700 701void ieee80211_unregister_hw(struct ieee80211_hw *hw) 702{ 703 struct ieee80211_local *local = hw_to_local(hw); 704 705 tasklet_kill(&local->tx_pending_tasklet); 706 tasklet_kill(&local->tasklet); 707 708 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 709 &local->network_latency_notifier); 710 unregister_inetaddr_notifier(&local->ifa_notifier); 711 712 rtnl_lock(); 713 714 /* 715 * At this point, interface list manipulations are fine 716 * because the driver cannot be handing us frames any 717 * more and the tasklet is killed. 718 */ 719 ieee80211_remove_interfaces(local); 720 721 rtnl_unlock(); 722 723 cancel_work_sync(&local->reconfig_filter); 724 725 ieee80211_clear_tx_pending(local); 726 sta_info_stop(local); 727 rate_control_deinitialize(local); 728 729 if (skb_queue_len(&local->skb_queue) || 730 skb_queue_len(&local->skb_queue_unreliable)) 731 printk(KERN_WARNING "%s: skb_queue not empty\n", 732 wiphy_name(local->hw.wiphy)); 733 skb_queue_purge(&local->skb_queue); 734 skb_queue_purge(&local->skb_queue_unreliable); 735 736 destroy_workqueue(local->workqueue); 737 wiphy_unregister(local->hw.wiphy); 738 ieee80211_wep_free(local); 739 ieee80211_led_exit(local); 740 kfree(local->int_scan_req); 741} 742EXPORT_SYMBOL(ieee80211_unregister_hw); 743 744void ieee80211_free_hw(struct ieee80211_hw *hw) 745{ 746 struct ieee80211_local *local = hw_to_local(hw); 747 748 mutex_destroy(&local->iflist_mtx); 749 mutex_destroy(&local->scan_mtx); 750 751 wiphy_free(local->hw.wiphy); 752} 753EXPORT_SYMBOL(ieee80211_free_hw); 754 755static int __init ieee80211_init(void) 756{ 757 struct sk_buff *skb; 758 int ret; 759 760 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 761 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 762 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 763 764 ret = rc80211_minstrel_init(); 765 if (ret) 766 return ret; 767 768 ret = rc80211_minstrel_ht_init(); 769 if (ret) 770 goto err_minstrel; 771 772 ret = rc80211_pid_init(); 773 if (ret) 774 goto err_pid; 775 776 ret = ieee80211_iface_init(); 777 if (ret) 778 goto err_netdev; 779 780 return 0; 781 err_netdev: 782 rc80211_pid_exit(); 783 err_pid: 784 rc80211_minstrel_ht_exit(); 785 err_minstrel: 786 rc80211_minstrel_exit(); 787 788 return ret; 789} 790 791static void __exit ieee80211_exit(void) 792{ 793 rc80211_pid_exit(); 794 rc80211_minstrel_ht_exit(); 795 rc80211_minstrel_exit(); 796 797 /* 798 * For key todo, it'll be empty by now but the work 799 * might still be scheduled. 800 */ 801 flush_scheduled_work(); 802 803 if (mesh_allocated) 804 ieee80211s_stop(); 805 806 ieee80211_iface_exit(); 807} 808 809 810subsys_initcall(ieee80211_init); 811module_exit(ieee80211_exit); 812 813MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 814MODULE_LICENSE("GPL"); 815