main.c revision 5daa8a8e691e28c6c725e7e91319b160b555c615
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 <linux/inetdevice.h> 24#include <net/net_namespace.h> 25#include <net/cfg80211.h> 26 27#include "ieee80211_i.h" 28#include "driver-ops.h" 29#include "rate.h" 30#include "mesh.h" 31#include "wep.h" 32#include "led.h" 33#include "cfg.h" 34#include "debugfs.h" 35 36 37bool ieee80211_disable_40mhz_24ghz; 38module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); 39MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, 40 "Disable 40MHz support in the 2.4GHz band"); 41 42void ieee80211_configure_filter(struct ieee80211_local *local) 43{ 44 u64 mc; 45 unsigned int changed_flags; 46 unsigned int new_flags = 0; 47 48 if (atomic_read(&local->iff_promiscs)) 49 new_flags |= FIF_PROMISC_IN_BSS; 50 51 if (atomic_read(&local->iff_allmultis)) 52 new_flags |= FIF_ALLMULTI; 53 54 if (local->monitors || local->scanning) 55 new_flags |= FIF_BCN_PRBRESP_PROMISC; 56 57 if (local->fif_fcsfail) 58 new_flags |= FIF_FCSFAIL; 59 60 if (local->fif_plcpfail) 61 new_flags |= FIF_PLCPFAIL; 62 63 if (local->fif_control) 64 new_flags |= FIF_CONTROL; 65 66 if (local->fif_other_bss) 67 new_flags |= FIF_OTHER_BSS; 68 69 if (local->fif_pspoll) 70 new_flags |= FIF_PSPOLL; 71 72 spin_lock_bh(&local->filter_lock); 73 changed_flags = local->filter_flags ^ new_flags; 74 75 mc = drv_prepare_multicast(local, &local->mc_list); 76 spin_unlock_bh(&local->filter_lock); 77 78 /* be a bit nasty */ 79 new_flags |= (1<<31); 80 81 drv_configure_filter(local, changed_flags, &new_flags, mc); 82 83 WARN_ON(new_flags & (1<<31)); 84 85 local->filter_flags = new_flags & ~(1<<31); 86} 87 88static void ieee80211_reconfig_filter(struct work_struct *work) 89{ 90 struct ieee80211_local *local = 91 container_of(work, struct ieee80211_local, reconfig_filter); 92 93 ieee80211_configure_filter(local); 94} 95 96int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 97{ 98 struct ieee80211_channel *chan, *scan_chan; 99 int ret = 0; 100 int power; 101 enum nl80211_channel_type channel_type; 102 u32 offchannel_flag; 103 104 might_sleep(); 105 106 scan_chan = local->scan_channel; 107 108 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 109 if (scan_chan) { 110 chan = scan_chan; 111 channel_type = NL80211_CHAN_NO_HT; 112 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 113 } else if (local->tmp_channel) { 114 chan = scan_chan = local->tmp_channel; 115 channel_type = local->tmp_channel_type; 116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 117 } else { 118 chan = local->oper_channel; 119 channel_type = local->_oper_channel_type; 120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 121 } 122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 123 124 if (offchannel_flag || chan != local->hw.conf.channel || 125 channel_type != local->hw.conf.channel_type) { 126 local->hw.conf.channel = chan; 127 local->hw.conf.channel_type = channel_type; 128 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 129 } 130 131 if (!conf_is_ht(&local->hw.conf)) { 132 /* 133 * mac80211.h documents that this is only valid 134 * when the channel is set to an HT type, and 135 * that otherwise STATIC is used. 136 */ 137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 138 } else if (local->hw.conf.smps_mode != local->smps_mode) { 139 local->hw.conf.smps_mode = local->smps_mode; 140 changed |= IEEE80211_CONF_CHANGE_SMPS; 141 } 142 143 if (scan_chan) 144 power = chan->max_power; 145 else 146 power = local->power_constr_level ? 147 (chan->max_power - local->power_constr_level) : 148 chan->max_power; 149 150 if (local->user_power_level >= 0) 151 power = min(power, local->user_power_level); 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 if (changed && local->open_count) { 159 ret = drv_config(local, changed); 160 /* 161 * Goal: 162 * HW reconfiguration should never fail, the driver has told 163 * us what it can support so it should live up to that promise. 164 * 165 * Current status: 166 * rfkill is not integrated with mac80211 and a 167 * configuration command can thus fail if hardware rfkill 168 * is enabled 169 * 170 * FIXME: integrate rfkill with mac80211 and then add this 171 * WARN_ON() back 172 * 173 */ 174 /* WARN_ON(ret); */ 175 } 176 177 return ret; 178} 179 180void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 181 u32 changed) 182{ 183 struct ieee80211_local *local = sdata->local; 184 static const u8 zero[ETH_ALEN] = { 0 }; 185 186 if (!changed) 187 return; 188 189 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 190 /* 191 * While not associated, claim a BSSID of all-zeroes 192 * so that drivers don't do any weird things with the 193 * BSSID at that time. 194 */ 195 if (sdata->vif.bss_conf.assoc) 196 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 197 else 198 sdata->vif.bss_conf.bssid = zero; 199 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 200 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 201 else if (sdata->vif.type == NL80211_IFTYPE_AP) 202 sdata->vif.bss_conf.bssid = sdata->vif.addr; 203 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 204 sdata->vif.bss_conf.bssid = zero; 205 } else { 206 WARN_ON(1); 207 return; 208 } 209 210 switch (sdata->vif.type) { 211 case NL80211_IFTYPE_AP: 212 case NL80211_IFTYPE_ADHOC: 213 case NL80211_IFTYPE_MESH_POINT: 214 break; 215 default: 216 /* do not warn to simplify caller in scan.c */ 217 changed &= ~BSS_CHANGED_BEACON_ENABLED; 218 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 219 return; 220 break; 221 } 222 223 if (changed & BSS_CHANGED_BEACON_ENABLED) { 224 if (local->quiescing || !ieee80211_sdata_running(sdata) || 225 test_bit(SCAN_SW_SCANNING, &local->scanning)) { 226 sdata->vif.bss_conf.enable_beacon = false; 227 } else { 228 /* 229 * Beacon should be enabled, but AP mode must 230 * check whether there is a beacon configured. 231 */ 232 switch (sdata->vif.type) { 233 case NL80211_IFTYPE_AP: 234 sdata->vif.bss_conf.enable_beacon = 235 !!sdata->u.ap.beacon; 236 break; 237 case NL80211_IFTYPE_ADHOC: 238 sdata->vif.bss_conf.enable_beacon = 239 !!sdata->u.ibss.presp; 240 break; 241 case NL80211_IFTYPE_MESH_POINT: 242 sdata->vif.bss_conf.enable_beacon = true; 243 break; 244 default: 245 /* not reached */ 246 WARN_ON(1); 247 break; 248 } 249 } 250 } 251 252 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 253} 254 255u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 256{ 257 sdata->vif.bss_conf.use_cts_prot = false; 258 sdata->vif.bss_conf.use_short_preamble = false; 259 sdata->vif.bss_conf.use_short_slot = false; 260 return BSS_CHANGED_ERP_CTS_PROT | 261 BSS_CHANGED_ERP_PREAMBLE | 262 BSS_CHANGED_ERP_SLOT; 263} 264 265static void ieee80211_tasklet_handler(unsigned long data) 266{ 267 struct ieee80211_local *local = (struct ieee80211_local *) data; 268 struct sk_buff *skb; 269 270 while ((skb = skb_dequeue(&local->skb_queue)) || 271 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 272 switch (skb->pkt_type) { 273 case IEEE80211_RX_MSG: 274 /* Clear skb->pkt_type in order to not confuse kernel 275 * netstack. */ 276 skb->pkt_type = 0; 277 ieee80211_rx(local_to_hw(local), skb); 278 break; 279 case IEEE80211_TX_STATUS_MSG: 280 skb->pkt_type = 0; 281 ieee80211_tx_status(local_to_hw(local), skb); 282 break; 283 default: 284 WARN(1, "mac80211: Packet is of unknown type %d\n", 285 skb->pkt_type); 286 dev_kfree_skb(skb); 287 break; 288 } 289 } 290} 291 292static void ieee80211_restart_work(struct work_struct *work) 293{ 294 struct ieee80211_local *local = 295 container_of(work, struct ieee80211_local, restart_work); 296 297 rtnl_lock(); 298 ieee80211_reconfig(local); 299 rtnl_unlock(); 300} 301 302void ieee80211_restart_hw(struct ieee80211_hw *hw) 303{ 304 struct ieee80211_local *local = hw_to_local(hw); 305 306 trace_api_restart_hw(local); 307 308 /* use this reason, __ieee80211_resume will unblock it */ 309 ieee80211_stop_queues_by_reason(hw, 310 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 311 312 schedule_work(&local->restart_work); 313} 314EXPORT_SYMBOL(ieee80211_restart_hw); 315 316static void ieee80211_recalc_smps_work(struct work_struct *work) 317{ 318 struct ieee80211_local *local = 319 container_of(work, struct ieee80211_local, recalc_smps); 320 321 mutex_lock(&local->iflist_mtx); 322 ieee80211_recalc_smps(local, NULL); 323 mutex_unlock(&local->iflist_mtx); 324} 325 326#ifdef CONFIG_INET 327static int ieee80211_ifa_changed(struct notifier_block *nb, 328 unsigned long data, void *arg) 329{ 330 struct in_ifaddr *ifa = arg; 331 struct ieee80211_local *local = 332 container_of(nb, struct ieee80211_local, 333 ifa_notifier); 334 struct net_device *ndev = ifa->ifa_dev->dev; 335 struct wireless_dev *wdev = ndev->ieee80211_ptr; 336 struct in_device *idev; 337 struct ieee80211_sub_if_data *sdata; 338 struct ieee80211_bss_conf *bss_conf; 339 struct ieee80211_if_managed *ifmgd; 340 int c = 0; 341 342 if (!netif_running(ndev)) 343 return NOTIFY_DONE; 344 345 /* Make sure it's our interface that got changed */ 346 if (!wdev) 347 return NOTIFY_DONE; 348 349 if (wdev->wiphy != local->hw.wiphy) 350 return NOTIFY_DONE; 351 352 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 353 bss_conf = &sdata->vif.bss_conf; 354 355 /* ARP filtering is only supported in managed mode */ 356 if (sdata->vif.type != NL80211_IFTYPE_STATION) 357 return NOTIFY_DONE; 358 359 idev = sdata->dev->ip_ptr; 360 if (!idev) 361 return NOTIFY_DONE; 362 363 ifmgd = &sdata->u.mgd; 364 mutex_lock(&ifmgd->mtx); 365 366 /* Copy the addresses to the bss_conf list */ 367 ifa = idev->ifa_list; 368 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 369 bss_conf->arp_addr_list[c] = ifa->ifa_address; 370 ifa = ifa->ifa_next; 371 c++; 372 } 373 374 /* If not all addresses fit the list, disable filtering */ 375 if (ifa) { 376 sdata->arp_filter_state = false; 377 c = 0; 378 } else { 379 sdata->arp_filter_state = true; 380 } 381 bss_conf->arp_addr_cnt = c; 382 383 /* Configure driver only if associated */ 384 if (ifmgd->associated) { 385 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 386 ieee80211_bss_info_change_notify(sdata, 387 BSS_CHANGED_ARP_FILTER); 388 } 389 390 mutex_unlock(&ifmgd->mtx); 391 392 return NOTIFY_DONE; 393} 394#endif 395 396static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 397{ 398 struct ieee80211_local *local = 399 container_of(napi, struct ieee80211_local, napi); 400 401 return local->ops->napi_poll(&local->hw, budget); 402} 403 404void ieee80211_napi_schedule(struct ieee80211_hw *hw) 405{ 406 struct ieee80211_local *local = hw_to_local(hw); 407 408 napi_schedule(&local->napi); 409} 410EXPORT_SYMBOL(ieee80211_napi_schedule); 411 412void ieee80211_napi_complete(struct ieee80211_hw *hw) 413{ 414 struct ieee80211_local *local = hw_to_local(hw); 415 416 napi_complete(&local->napi); 417} 418EXPORT_SYMBOL(ieee80211_napi_complete); 419 420struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 421 const struct ieee80211_ops *ops) 422{ 423 struct ieee80211_local *local; 424 int priv_size, i; 425 struct wiphy *wiphy; 426 427 /* Ensure 32-byte alignment of our private data and hw private data. 428 * We use the wiphy priv data for both our ieee80211_local and for 429 * the driver's private data 430 * 431 * In memory it'll be like this: 432 * 433 * +-------------------------+ 434 * | struct wiphy | 435 * +-------------------------+ 436 * | struct ieee80211_local | 437 * +-------------------------+ 438 * | driver's private data | 439 * +-------------------------+ 440 * 441 */ 442 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 443 444 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 445 446 if (!wiphy) 447 return NULL; 448 449 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 450 WIPHY_FLAG_4ADDR_AP | 451 WIPHY_FLAG_4ADDR_STATION; 452 wiphy->privid = mac80211_wiphy_privid; 453 454 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 455 456 local = wiphy_priv(wiphy); 457 458 local->hw.wiphy = wiphy; 459 460 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 461 462 BUG_ON(!ops->tx); 463 BUG_ON(!ops->start); 464 BUG_ON(!ops->stop); 465 BUG_ON(!ops->config); 466 BUG_ON(!ops->add_interface); 467 BUG_ON(!ops->remove_interface); 468 BUG_ON(!ops->configure_filter); 469 local->ops = ops; 470 471 /* set up some defaults */ 472 local->hw.queues = 1; 473 local->hw.max_rates = 1; 474 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 475 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 476 local->user_power_level = -1; 477 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 478 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 479 480 INIT_LIST_HEAD(&local->interfaces); 481 482 __hw_addr_init(&local->mc_list); 483 484 mutex_init(&local->iflist_mtx); 485 mutex_init(&local->mtx); 486 487 mutex_init(&local->key_mtx); 488 spin_lock_init(&local->filter_lock); 489 spin_lock_init(&local->queue_stop_reason_lock); 490 491 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 492 493 ieee80211_work_init(local); 494 495 INIT_WORK(&local->restart_work, ieee80211_restart_work); 496 497 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 498 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 499 local->smps_mode = IEEE80211_SMPS_OFF; 500 501 INIT_WORK(&local->dynamic_ps_enable_work, 502 ieee80211_dynamic_ps_enable_work); 503 INIT_WORK(&local->dynamic_ps_disable_work, 504 ieee80211_dynamic_ps_disable_work); 505 setup_timer(&local->dynamic_ps_timer, 506 ieee80211_dynamic_ps_timer, (unsigned long) local); 507 508 sta_info_init(local); 509 510 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 511 skb_queue_head_init(&local->pending[i]); 512 atomic_set(&local->agg_queue_stop[i], 0); 513 } 514 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 515 (unsigned long)local); 516 517 tasklet_init(&local->tasklet, 518 ieee80211_tasklet_handler, 519 (unsigned long) local); 520 521 skb_queue_head_init(&local->skb_queue); 522 skb_queue_head_init(&local->skb_queue_unreliable); 523 524 /* init dummy netdev for use w/ NAPI */ 525 init_dummy_netdev(&local->napi_dev); 526 527 return local_to_hw(local); 528} 529EXPORT_SYMBOL(ieee80211_alloc_hw); 530 531int ieee80211_register_hw(struct ieee80211_hw *hw) 532{ 533 struct ieee80211_local *local = hw_to_local(hw); 534 int result; 535 enum ieee80211_band band; 536 int channels, max_bitrates; 537 bool supp_ht; 538 static const u32 cipher_suites[] = { 539 /* keep WEP first, it may be removed below */ 540 WLAN_CIPHER_SUITE_WEP40, 541 WLAN_CIPHER_SUITE_WEP104, 542 WLAN_CIPHER_SUITE_TKIP, 543 WLAN_CIPHER_SUITE_CCMP, 544 545 /* keep last -- depends on hw flags! */ 546 WLAN_CIPHER_SUITE_AES_CMAC 547 }; 548 549 /* 550 * generic code guarantees at least one band, 551 * set this very early because much code assumes 552 * that hw.conf.channel is assigned 553 */ 554 channels = 0; 555 max_bitrates = 0; 556 supp_ht = false; 557 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 558 struct ieee80211_supported_band *sband; 559 560 sband = local->hw.wiphy->bands[band]; 561 if (!sband) 562 continue; 563 if (!local->oper_channel) { 564 /* init channel we're on */ 565 local->hw.conf.channel = 566 local->oper_channel = &sband->channels[0]; 567 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 568 } 569 channels += sband->n_channels; 570 571 if (max_bitrates < sband->n_bitrates) 572 max_bitrates = sband->n_bitrates; 573 supp_ht = supp_ht || sband->ht_cap.ht_supported; 574 } 575 576 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 577 sizeof(void *) * channels, GFP_KERNEL); 578 if (!local->int_scan_req) 579 return -ENOMEM; 580 581 /* if low-level driver supports AP, we also support VLAN */ 582 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 583 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 584 585 /* mac80211 always supports monitor */ 586 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 587 588 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 589 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 590 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 591 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 592 593 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 594 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 595 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 596 597 /* 598 * Calculate scan IE length -- we need this to alloc 599 * memory and to subtract from the driver limit. It 600 * includes the (extended) supported rates and HT 601 * information -- SSID is the driver's responsibility. 602 */ 603 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 604 if (supp_ht) 605 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 606 607 if (!local->ops->hw_scan) { 608 /* For hw_scan, driver needs to set these up. */ 609 local->hw.wiphy->max_scan_ssids = 4; 610 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 611 } 612 613 /* 614 * If the driver supports any scan IEs, then assume the 615 * limit includes the IEs mac80211 will add, otherwise 616 * leave it at zero and let the driver sort it out; we 617 * still pass our IEs to the driver but userspace will 618 * not be allowed to in that case. 619 */ 620 if (local->hw.wiphy->max_scan_ie_len) 621 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 622 623 local->hw.wiphy->cipher_suites = cipher_suites; 624 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 625 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 626 local->hw.wiphy->n_cipher_suites--; 627 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 628 local->hw.wiphy->cipher_suites += 2; 629 local->hw.wiphy->n_cipher_suites -= 2; 630 } 631 632 result = wiphy_register(local->hw.wiphy); 633 if (result < 0) 634 goto fail_wiphy_register; 635 636 /* 637 * We use the number of queues for feature tests (QoS, HT) internally 638 * so restrict them appropriately. 639 */ 640 if (hw->queues > IEEE80211_MAX_QUEUES) 641 hw->queues = IEEE80211_MAX_QUEUES; 642 643 local->workqueue = 644 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 645 if (!local->workqueue) { 646 result = -ENOMEM; 647 goto fail_workqueue; 648 } 649 650 /* 651 * The hardware needs headroom for sending the frame, 652 * and we need some headroom for passing the frame to monitor 653 * interfaces, but never both at the same time. 654 */ 655 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 656 sizeof(struct ieee80211_tx_status_rtap_hdr)); 657 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 658 sizeof(struct ieee80211_tx_status_rtap_hdr)); 659 660 debugfs_hw_add(local); 661 662 /* 663 * if the driver doesn't specify a max listen interval we 664 * use 5 which should be a safe default 665 */ 666 if (local->hw.max_listen_interval == 0) 667 local->hw.max_listen_interval = 5; 668 669 local->hw.conf.listen_interval = local->hw.max_listen_interval; 670 671 local->dynamic_ps_forced_timeout = -1; 672 673 result = sta_info_start(local); 674 if (result < 0) 675 goto fail_sta_info; 676 677 result = ieee80211_wep_init(local); 678 if (result < 0) 679 printk(KERN_DEBUG "%s: Failed to initialize wep: %d\n", 680 wiphy_name(local->hw.wiphy), result); 681 682 rtnl_lock(); 683 684 result = ieee80211_init_rate_ctrl_alg(local, 685 hw->rate_control_algorithm); 686 if (result < 0) { 687 printk(KERN_DEBUG "%s: Failed to initialize rate control " 688 "algorithm\n", wiphy_name(local->hw.wiphy)); 689 goto fail_rate; 690 } 691 692 /* add one default STA interface if supported */ 693 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 694 result = ieee80211_if_add(local, "wlan%d", NULL, 695 NL80211_IFTYPE_STATION, NULL); 696 if (result) 697 printk(KERN_WARNING "%s: Failed to add default virtual iface\n", 698 wiphy_name(local->hw.wiphy)); 699 } 700 701 rtnl_unlock(); 702 703 ieee80211_led_init(local); 704 705 local->network_latency_notifier.notifier_call = 706 ieee80211_max_network_latency; 707 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 708 &local->network_latency_notifier); 709 if (result) { 710 rtnl_lock(); 711 goto fail_pm_qos; 712 } 713 714#ifdef CONFIG_INET 715 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 716 result = register_inetaddr_notifier(&local->ifa_notifier); 717 if (result) 718 goto fail_ifa; 719#endif 720 721 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 722 local->hw.napi_weight); 723 724 return 0; 725 726#ifdef CONFIG_INET 727 fail_ifa: 728 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 729 &local->network_latency_notifier); 730 rtnl_lock(); 731#endif 732 fail_pm_qos: 733 ieee80211_led_exit(local); 734 ieee80211_remove_interfaces(local); 735 fail_rate: 736 rtnl_unlock(); 737 ieee80211_wep_free(local); 738 sta_info_stop(local); 739 fail_sta_info: 740 destroy_workqueue(local->workqueue); 741 fail_workqueue: 742 wiphy_unregister(local->hw.wiphy); 743 fail_wiphy_register: 744 kfree(local->int_scan_req); 745 return result; 746} 747EXPORT_SYMBOL(ieee80211_register_hw); 748 749void ieee80211_unregister_hw(struct ieee80211_hw *hw) 750{ 751 struct ieee80211_local *local = hw_to_local(hw); 752 753 tasklet_kill(&local->tx_pending_tasklet); 754 tasklet_kill(&local->tasklet); 755 756 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 757 &local->network_latency_notifier); 758#ifdef CONFIG_INET 759 unregister_inetaddr_notifier(&local->ifa_notifier); 760#endif 761 762 rtnl_lock(); 763 764 /* 765 * At this point, interface list manipulations are fine 766 * because the driver cannot be handing us frames any 767 * more and the tasklet is killed. 768 */ 769 ieee80211_remove_interfaces(local); 770 771 rtnl_unlock(); 772 773 cancel_work_sync(&local->reconfig_filter); 774 775 ieee80211_clear_tx_pending(local); 776 sta_info_stop(local); 777 rate_control_deinitialize(local); 778 779 if (skb_queue_len(&local->skb_queue) || 780 skb_queue_len(&local->skb_queue_unreliable)) 781 printk(KERN_WARNING "%s: skb_queue not empty\n", 782 wiphy_name(local->hw.wiphy)); 783 skb_queue_purge(&local->skb_queue); 784 skb_queue_purge(&local->skb_queue_unreliable); 785 786 destroy_workqueue(local->workqueue); 787 wiphy_unregister(local->hw.wiphy); 788 ieee80211_wep_free(local); 789 ieee80211_led_exit(local); 790 kfree(local->int_scan_req); 791} 792EXPORT_SYMBOL(ieee80211_unregister_hw); 793 794void ieee80211_free_hw(struct ieee80211_hw *hw) 795{ 796 struct ieee80211_local *local = hw_to_local(hw); 797 798 mutex_destroy(&local->iflist_mtx); 799 mutex_destroy(&local->mtx); 800 801 wiphy_free(local->hw.wiphy); 802} 803EXPORT_SYMBOL(ieee80211_free_hw); 804 805static int __init ieee80211_init(void) 806{ 807 struct sk_buff *skb; 808 int ret; 809 810 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 811 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 812 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 813 814 ret = rc80211_minstrel_init(); 815 if (ret) 816 return ret; 817 818 ret = rc80211_minstrel_ht_init(); 819 if (ret) 820 goto err_minstrel; 821 822 ret = rc80211_pid_init(); 823 if (ret) 824 goto err_pid; 825 826 ret = ieee80211_iface_init(); 827 if (ret) 828 goto err_netdev; 829 830 return 0; 831 err_netdev: 832 rc80211_pid_exit(); 833 err_pid: 834 rc80211_minstrel_ht_exit(); 835 err_minstrel: 836 rc80211_minstrel_exit(); 837 838 return ret; 839} 840 841static void __exit ieee80211_exit(void) 842{ 843 rc80211_pid_exit(); 844 rc80211_minstrel_ht_exit(); 845 rc80211_minstrel_exit(); 846 847 /* 848 * For key todo, it'll be empty by now but the work 849 * might still be scheduled. 850 */ 851 flush_scheduled_work(); 852 853 if (mesh_allocated) 854 ieee80211s_stop(); 855 856 ieee80211_iface_exit(); 857} 858 859 860subsys_initcall(ieee80211_init); 861module_exit(ieee80211_exit); 862 863MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 864MODULE_LICENSE("GPL"); 865