main.c revision 1be7fe8de9f25e173282f8f989f83bc5b5decfe9
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 local->oper_channel != local->tmp_channel) { 115 chan = scan_chan = local->tmp_channel; 116 channel_type = local->tmp_channel_type; 117 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 118 } else { 119 chan = local->oper_channel; 120 channel_type = local->_oper_channel_type; 121 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 122 } 123 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 124 125 if (offchannel_flag || chan != local->hw.conf.channel || 126 channel_type != local->hw.conf.channel_type) { 127 local->hw.conf.channel = chan; 128 local->hw.conf.channel_type = channel_type; 129 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 130 } 131 132 if (!conf_is_ht(&local->hw.conf)) { 133 /* 134 * mac80211.h documents that this is only valid 135 * when the channel is set to an HT type, and 136 * that otherwise STATIC is used. 137 */ 138 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 139 } else if (local->hw.conf.smps_mode != local->smps_mode) { 140 local->hw.conf.smps_mode = local->smps_mode; 141 changed |= IEEE80211_CONF_CHANGE_SMPS; 142 } 143 144 if (scan_chan) 145 power = chan->max_power; 146 else 147 power = local->power_constr_level ? 148 (chan->max_power - local->power_constr_level) : 149 chan->max_power; 150 151 if (local->user_power_level >= 0) 152 power = min(power, local->user_power_level); 153 154 if (local->hw.conf.power_level != power) { 155 changed |= IEEE80211_CONF_CHANGE_POWER; 156 local->hw.conf.power_level = power; 157 } 158 159 if (changed && local->open_count) { 160 ret = drv_config(local, changed); 161 /* 162 * Goal: 163 * HW reconfiguration should never fail, the driver has told 164 * us what it can support so it should live up to that promise. 165 * 166 * Current status: 167 * rfkill is not integrated with mac80211 and a 168 * configuration command can thus fail if hardware rfkill 169 * is enabled 170 * 171 * FIXME: integrate rfkill with mac80211 and then add this 172 * WARN_ON() back 173 * 174 */ 175 /* WARN_ON(ret); */ 176 } 177 178 return ret; 179} 180 181void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 182 u32 changed) 183{ 184 struct ieee80211_local *local = sdata->local; 185 static const u8 zero[ETH_ALEN] = { 0 }; 186 187 if (!changed) 188 return; 189 190 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 191 /* 192 * While not associated, claim a BSSID of all-zeroes 193 * so that drivers don't do any weird things with the 194 * BSSID at that time. 195 */ 196 if (sdata->vif.bss_conf.assoc) 197 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 198 else 199 sdata->vif.bss_conf.bssid = zero; 200 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 201 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 202 else if (sdata->vif.type == NL80211_IFTYPE_AP) 203 sdata->vif.bss_conf.bssid = sdata->vif.addr; 204 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 205 sdata->vif.bss_conf.bssid = NULL; 206 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 207 sdata->vif.bss_conf.bssid = zero; 208 } else { 209 WARN_ON(1); 210 return; 211 } 212 213 switch (sdata->vif.type) { 214 case NL80211_IFTYPE_AP: 215 case NL80211_IFTYPE_ADHOC: 216 case NL80211_IFTYPE_WDS: 217 case NL80211_IFTYPE_MESH_POINT: 218 break; 219 default: 220 /* do not warn to simplify caller in scan.c */ 221 changed &= ~BSS_CHANGED_BEACON_ENABLED; 222 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 223 return; 224 break; 225 } 226 227 if (changed & BSS_CHANGED_BEACON_ENABLED) { 228 if (local->quiescing || !ieee80211_sdata_running(sdata) || 229 test_bit(SCAN_SW_SCANNING, &local->scanning)) { 230 sdata->vif.bss_conf.enable_beacon = false; 231 } else { 232 /* 233 * Beacon should be enabled, but AP mode must 234 * check whether there is a beacon configured. 235 */ 236 switch (sdata->vif.type) { 237 case NL80211_IFTYPE_AP: 238 sdata->vif.bss_conf.enable_beacon = 239 !!sdata->u.ap.beacon; 240 break; 241 case NL80211_IFTYPE_ADHOC: 242 sdata->vif.bss_conf.enable_beacon = 243 !!sdata->u.ibss.presp; 244 break; 245 case NL80211_IFTYPE_MESH_POINT: 246 sdata->vif.bss_conf.enable_beacon = true; 247 break; 248 default: 249 /* not reached */ 250 WARN_ON(1); 251 break; 252 } 253 } 254 } 255 256 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 257} 258 259u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 260{ 261 sdata->vif.bss_conf.use_cts_prot = false; 262 sdata->vif.bss_conf.use_short_preamble = false; 263 sdata->vif.bss_conf.use_short_slot = false; 264 return BSS_CHANGED_ERP_CTS_PROT | 265 BSS_CHANGED_ERP_PREAMBLE | 266 BSS_CHANGED_ERP_SLOT; 267} 268 269static void ieee80211_tasklet_handler(unsigned long data) 270{ 271 struct ieee80211_local *local = (struct ieee80211_local *) data; 272 struct sk_buff *skb; 273 274 while ((skb = skb_dequeue(&local->skb_queue)) || 275 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 276 switch (skb->pkt_type) { 277 case IEEE80211_RX_MSG: 278 /* Clear skb->pkt_type in order to not confuse kernel 279 * netstack. */ 280 skb->pkt_type = 0; 281 ieee80211_rx(local_to_hw(local), skb); 282 break; 283 case IEEE80211_TX_STATUS_MSG: 284 skb->pkt_type = 0; 285 ieee80211_tx_status(local_to_hw(local), skb); 286 break; 287 default: 288 WARN(1, "mac80211: Packet is of unknown type %d\n", 289 skb->pkt_type); 290 dev_kfree_skb(skb); 291 break; 292 } 293 } 294} 295 296static void ieee80211_restart_work(struct work_struct *work) 297{ 298 struct ieee80211_local *local = 299 container_of(work, struct ieee80211_local, restart_work); 300 301 /* wait for scan work complete */ 302 flush_workqueue(local->workqueue); 303 304 mutex_lock(&local->mtx); 305 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 306 "%s called with hardware scan in progress\n", __func__); 307 mutex_unlock(&local->mtx); 308 309 rtnl_lock(); 310 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning))) 311 ieee80211_scan_cancel(local); 312 ieee80211_reconfig(local); 313 rtnl_unlock(); 314} 315 316void ieee80211_restart_hw(struct ieee80211_hw *hw) 317{ 318 struct ieee80211_local *local = hw_to_local(hw); 319 320 trace_api_restart_hw(local); 321 322 /* use this reason, ieee80211_reconfig will unblock it */ 323 ieee80211_stop_queues_by_reason(hw, 324 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 325 326 schedule_work(&local->restart_work); 327} 328EXPORT_SYMBOL(ieee80211_restart_hw); 329 330static void ieee80211_recalc_smps_work(struct work_struct *work) 331{ 332 struct ieee80211_local *local = 333 container_of(work, struct ieee80211_local, recalc_smps); 334 335 mutex_lock(&local->iflist_mtx); 336 ieee80211_recalc_smps(local, NULL); 337 mutex_unlock(&local->iflist_mtx); 338} 339 340#ifdef CONFIG_INET 341static int ieee80211_ifa_changed(struct notifier_block *nb, 342 unsigned long data, void *arg) 343{ 344 struct in_ifaddr *ifa = arg; 345 struct ieee80211_local *local = 346 container_of(nb, struct ieee80211_local, 347 ifa_notifier); 348 struct net_device *ndev = ifa->ifa_dev->dev; 349 struct wireless_dev *wdev = ndev->ieee80211_ptr; 350 struct in_device *idev; 351 struct ieee80211_sub_if_data *sdata; 352 struct ieee80211_bss_conf *bss_conf; 353 struct ieee80211_if_managed *ifmgd; 354 int c = 0; 355 356 /* Make sure it's our interface that got changed */ 357 if (!wdev) 358 return NOTIFY_DONE; 359 360 if (wdev->wiphy != local->hw.wiphy) 361 return NOTIFY_DONE; 362 363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 364 bss_conf = &sdata->vif.bss_conf; 365 366 if (!ieee80211_sdata_running(sdata)) 367 return NOTIFY_DONE; 368 369 /* ARP filtering is only supported in managed mode */ 370 if (sdata->vif.type != NL80211_IFTYPE_STATION) 371 return NOTIFY_DONE; 372 373 idev = sdata->dev->ip_ptr; 374 if (!idev) 375 return NOTIFY_DONE; 376 377 ifmgd = &sdata->u.mgd; 378 mutex_lock(&ifmgd->mtx); 379 380 /* Copy the addresses to the bss_conf list */ 381 ifa = idev->ifa_list; 382 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 383 bss_conf->arp_addr_list[c] = ifa->ifa_address; 384 ifa = ifa->ifa_next; 385 c++; 386 } 387 388 /* If not all addresses fit the list, disable filtering */ 389 if (ifa) { 390 sdata->arp_filter_state = false; 391 c = 0; 392 } else { 393 sdata->arp_filter_state = true; 394 } 395 bss_conf->arp_addr_cnt = c; 396 397 /* Configure driver only if associated */ 398 if (ifmgd->associated) { 399 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 400 ieee80211_bss_info_change_notify(sdata, 401 BSS_CHANGED_ARP_FILTER); 402 } 403 404 mutex_unlock(&ifmgd->mtx); 405 406 return NOTIFY_DONE; 407} 408#endif 409 410static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 411{ 412 struct ieee80211_local *local = 413 container_of(napi, struct ieee80211_local, napi); 414 415 return local->ops->napi_poll(&local->hw, budget); 416} 417 418void ieee80211_napi_schedule(struct ieee80211_hw *hw) 419{ 420 struct ieee80211_local *local = hw_to_local(hw); 421 422 napi_schedule(&local->napi); 423} 424EXPORT_SYMBOL(ieee80211_napi_schedule); 425 426void ieee80211_napi_complete(struct ieee80211_hw *hw) 427{ 428 struct ieee80211_local *local = hw_to_local(hw); 429 430 napi_complete(&local->napi); 431} 432EXPORT_SYMBOL(ieee80211_napi_complete); 433 434/* There isn't a lot of sense in it, but you can transmit anything you like */ 435static const struct ieee80211_txrx_stypes 436ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 437 [NL80211_IFTYPE_ADHOC] = { 438 .tx = 0xffff, 439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4), 440 }, 441 [NL80211_IFTYPE_STATION] = { 442 .tx = 0xffff, 443 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 444 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 445 }, 446 [NL80211_IFTYPE_AP] = { 447 .tx = 0xffff, 448 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 449 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 450 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 451 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 452 BIT(IEEE80211_STYPE_AUTH >> 4) | 453 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 454 BIT(IEEE80211_STYPE_ACTION >> 4), 455 }, 456 [NL80211_IFTYPE_AP_VLAN] = { 457 /* copy AP */ 458 .tx = 0xffff, 459 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 460 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 462 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 463 BIT(IEEE80211_STYPE_AUTH >> 4) | 464 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 465 BIT(IEEE80211_STYPE_ACTION >> 4), 466 }, 467 [NL80211_IFTYPE_P2P_CLIENT] = { 468 .tx = 0xffff, 469 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 470 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 471 }, 472 [NL80211_IFTYPE_P2P_GO] = { 473 .tx = 0xffff, 474 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 475 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 476 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 477 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 478 BIT(IEEE80211_STYPE_AUTH >> 4) | 479 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 480 BIT(IEEE80211_STYPE_ACTION >> 4), 481 }, 482}; 483 484struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 485 const struct ieee80211_ops *ops) 486{ 487 struct ieee80211_local *local; 488 int priv_size, i; 489 struct wiphy *wiphy; 490 491 /* Ensure 32-byte alignment of our private data and hw private data. 492 * We use the wiphy priv data for both our ieee80211_local and for 493 * the driver's private data 494 * 495 * In memory it'll be like this: 496 * 497 * +-------------------------+ 498 * | struct wiphy | 499 * +-------------------------+ 500 * | struct ieee80211_local | 501 * +-------------------------+ 502 * | driver's private data | 503 * +-------------------------+ 504 * 505 */ 506 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 507 508 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 509 510 if (!wiphy) 511 return NULL; 512 513 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 514 515 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 516 WIPHY_FLAG_4ADDR_AP | 517 WIPHY_FLAG_4ADDR_STATION; 518 wiphy->privid = mac80211_wiphy_privid; 519 520 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 521 522 local = wiphy_priv(wiphy); 523 524 local->hw.wiphy = wiphy; 525 526 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 527 528 BUG_ON(!ops->tx); 529 BUG_ON(!ops->start); 530 BUG_ON(!ops->stop); 531 BUG_ON(!ops->config); 532 BUG_ON(!ops->add_interface); 533 BUG_ON(!ops->remove_interface); 534 BUG_ON(!ops->configure_filter); 535 local->ops = ops; 536 537 /* set up some defaults */ 538 local->hw.queues = 1; 539 local->hw.max_rates = 1; 540 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 541 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 542 local->user_power_level = -1; 543 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 544 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 545 546 INIT_LIST_HEAD(&local->interfaces); 547 548 __hw_addr_init(&local->mc_list); 549 550 mutex_init(&local->iflist_mtx); 551 mutex_init(&local->mtx); 552 553 mutex_init(&local->key_mtx); 554 spin_lock_init(&local->filter_lock); 555 spin_lock_init(&local->queue_stop_reason_lock); 556 557 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 558 559 ieee80211_work_init(local); 560 561 INIT_WORK(&local->restart_work, ieee80211_restart_work); 562 563 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 564 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 565 local->smps_mode = IEEE80211_SMPS_OFF; 566 567 INIT_WORK(&local->dynamic_ps_enable_work, 568 ieee80211_dynamic_ps_enable_work); 569 INIT_WORK(&local->dynamic_ps_disable_work, 570 ieee80211_dynamic_ps_disable_work); 571 setup_timer(&local->dynamic_ps_timer, 572 ieee80211_dynamic_ps_timer, (unsigned long) local); 573 574 sta_info_init(local); 575 576 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 577 skb_queue_head_init(&local->pending[i]); 578 atomic_set(&local->agg_queue_stop[i], 0); 579 } 580 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 581 (unsigned long)local); 582 583 tasklet_init(&local->tasklet, 584 ieee80211_tasklet_handler, 585 (unsigned long) local); 586 587 skb_queue_head_init(&local->skb_queue); 588 skb_queue_head_init(&local->skb_queue_unreliable); 589 590 /* init dummy netdev for use w/ NAPI */ 591 init_dummy_netdev(&local->napi_dev); 592 593 return local_to_hw(local); 594} 595EXPORT_SYMBOL(ieee80211_alloc_hw); 596 597int ieee80211_register_hw(struct ieee80211_hw *hw) 598{ 599 struct ieee80211_local *local = hw_to_local(hw); 600 int result; 601 enum ieee80211_band band; 602 int channels, max_bitrates; 603 bool supp_ht; 604 static const u32 cipher_suites[] = { 605 /* keep WEP first, it may be removed below */ 606 WLAN_CIPHER_SUITE_WEP40, 607 WLAN_CIPHER_SUITE_WEP104, 608 WLAN_CIPHER_SUITE_TKIP, 609 WLAN_CIPHER_SUITE_CCMP, 610 611 /* keep last -- depends on hw flags! */ 612 WLAN_CIPHER_SUITE_AES_CMAC 613 }; 614 615 /* 616 * generic code guarantees at least one band, 617 * set this very early because much code assumes 618 * that hw.conf.channel is assigned 619 */ 620 channels = 0; 621 max_bitrates = 0; 622 supp_ht = false; 623 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 624 struct ieee80211_supported_band *sband; 625 626 sband = local->hw.wiphy->bands[band]; 627 if (!sband) 628 continue; 629 if (!local->oper_channel) { 630 /* init channel we're on */ 631 local->hw.conf.channel = 632 local->oper_channel = &sband->channels[0]; 633 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 634 } 635 channels += sband->n_channels; 636 637 if (max_bitrates < sband->n_bitrates) 638 max_bitrates = sband->n_bitrates; 639 supp_ht = supp_ht || sband->ht_cap.ht_supported; 640 } 641 642 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 643 sizeof(void *) * channels, GFP_KERNEL); 644 if (!local->int_scan_req) 645 return -ENOMEM; 646 647 /* if low-level driver supports AP, we also support VLAN */ 648 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 649 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 650 651 /* mac80211 always supports monitor */ 652 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 653 654#ifndef CONFIG_MAC80211_MESH 655 /* mesh depends on Kconfig, but drivers should set it if they want */ 656 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 657#endif 658 659 /* mac80211 supports control port protocol changing */ 660 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 661 662 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 663 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 664 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 665 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 666 667 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 668 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 669 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 670 671 /* 672 * Calculate scan IE length -- we need this to alloc 673 * memory and to subtract from the driver limit. It 674 * includes the (extended) supported rates and HT 675 * information -- SSID is the driver's responsibility. 676 */ 677 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 678 if (supp_ht) 679 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 680 681 if (!local->ops->hw_scan) { 682 /* For hw_scan, driver needs to set these up. */ 683 local->hw.wiphy->max_scan_ssids = 4; 684 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 685 } 686 687 /* 688 * If the driver supports any scan IEs, then assume the 689 * limit includes the IEs mac80211 will add, otherwise 690 * leave it at zero and let the driver sort it out; we 691 * still pass our IEs to the driver but userspace will 692 * not be allowed to in that case. 693 */ 694 if (local->hw.wiphy->max_scan_ie_len) 695 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 696 697 /* Set up cipher suites unless driver already did */ 698 if (!local->hw.wiphy->cipher_suites) { 699 local->hw.wiphy->cipher_suites = cipher_suites; 700 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 701 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 702 local->hw.wiphy->n_cipher_suites--; 703 } 704 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 705 if (local->hw.wiphy->cipher_suites == cipher_suites) { 706 local->hw.wiphy->cipher_suites += 2; 707 local->hw.wiphy->n_cipher_suites -= 2; 708 } else { 709 u32 *suites; 710 int r, w = 0; 711 712 /* Filter out WEP */ 713 714 suites = kmemdup( 715 local->hw.wiphy->cipher_suites, 716 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 717 GFP_KERNEL); 718 if (!suites) 719 return -ENOMEM; 720 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 721 u32 suite = local->hw.wiphy->cipher_suites[r]; 722 if (suite == WLAN_CIPHER_SUITE_WEP40 || 723 suite == WLAN_CIPHER_SUITE_WEP104) 724 continue; 725 suites[w++] = suite; 726 } 727 local->hw.wiphy->cipher_suites = suites; 728 local->hw.wiphy->n_cipher_suites = w; 729 local->wiphy_ciphers_allocated = true; 730 } 731 } 732 733 result = wiphy_register(local->hw.wiphy); 734 if (result < 0) 735 goto fail_wiphy_register; 736 737 /* 738 * We use the number of queues for feature tests (QoS, HT) internally 739 * so restrict them appropriately. 740 */ 741 if (hw->queues > IEEE80211_MAX_QUEUES) 742 hw->queues = IEEE80211_MAX_QUEUES; 743 744 local->workqueue = 745 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 746 if (!local->workqueue) { 747 result = -ENOMEM; 748 goto fail_workqueue; 749 } 750 751 /* 752 * The hardware needs headroom for sending the frame, 753 * and we need some headroom for passing the frame to monitor 754 * interfaces, but never both at the same time. 755 */ 756 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 757 sizeof(struct ieee80211_tx_status_rtap_hdr)); 758 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 759 sizeof(struct ieee80211_tx_status_rtap_hdr)); 760 761 debugfs_hw_add(local); 762 763 /* 764 * if the driver doesn't specify a max listen interval we 765 * use 5 which should be a safe default 766 */ 767 if (local->hw.max_listen_interval == 0) 768 local->hw.max_listen_interval = 5; 769 770 local->hw.conf.listen_interval = local->hw.max_listen_interval; 771 772 local->dynamic_ps_forced_timeout = -1; 773 774 result = sta_info_start(local); 775 if (result < 0) 776 goto fail_sta_info; 777 778 result = ieee80211_wep_init(local); 779 if (result < 0) 780 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 781 result); 782 783 rtnl_lock(); 784 785 result = ieee80211_init_rate_ctrl_alg(local, 786 hw->rate_control_algorithm); 787 if (result < 0) { 788 wiphy_debug(local->hw.wiphy, 789 "Failed to initialize rate control algorithm\n"); 790 goto fail_rate; 791 } 792 793 /* add one default STA interface if supported */ 794 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 795 result = ieee80211_if_add(local, "wlan%d", NULL, 796 NL80211_IFTYPE_STATION, NULL); 797 if (result) 798 wiphy_warn(local->hw.wiphy, 799 "Failed to add default virtual iface\n"); 800 } 801 802 rtnl_unlock(); 803 804 ieee80211_led_init(local); 805 806 local->network_latency_notifier.notifier_call = 807 ieee80211_max_network_latency; 808 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 809 &local->network_latency_notifier); 810 if (result) { 811 rtnl_lock(); 812 goto fail_pm_qos; 813 } 814 815#ifdef CONFIG_INET 816 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 817 result = register_inetaddr_notifier(&local->ifa_notifier); 818 if (result) 819 goto fail_ifa; 820#endif 821 822 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 823 local->hw.napi_weight); 824 825 return 0; 826 827#ifdef CONFIG_INET 828 fail_ifa: 829 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 830 &local->network_latency_notifier); 831 rtnl_lock(); 832#endif 833 fail_pm_qos: 834 ieee80211_led_exit(local); 835 ieee80211_remove_interfaces(local); 836 fail_rate: 837 rtnl_unlock(); 838 ieee80211_wep_free(local); 839 sta_info_stop(local); 840 fail_sta_info: 841 destroy_workqueue(local->workqueue); 842 fail_workqueue: 843 wiphy_unregister(local->hw.wiphy); 844 fail_wiphy_register: 845 if (local->wiphy_ciphers_allocated) 846 kfree(local->hw.wiphy->cipher_suites); 847 kfree(local->int_scan_req); 848 return result; 849} 850EXPORT_SYMBOL(ieee80211_register_hw); 851 852void ieee80211_unregister_hw(struct ieee80211_hw *hw) 853{ 854 struct ieee80211_local *local = hw_to_local(hw); 855 856 tasklet_kill(&local->tx_pending_tasklet); 857 tasklet_kill(&local->tasklet); 858 859 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 860 &local->network_latency_notifier); 861#ifdef CONFIG_INET 862 unregister_inetaddr_notifier(&local->ifa_notifier); 863#endif 864 865 rtnl_lock(); 866 867 /* 868 * At this point, interface list manipulations are fine 869 * because the driver cannot be handing us frames any 870 * more and the tasklet is killed. 871 */ 872 ieee80211_remove_interfaces(local); 873 874 rtnl_unlock(); 875 876 /* 877 * Now all work items will be gone, but the 878 * timer might still be armed, so delete it 879 */ 880 del_timer_sync(&local->work_timer); 881 882 cancel_work_sync(&local->restart_work); 883 cancel_work_sync(&local->reconfig_filter); 884 885 ieee80211_clear_tx_pending(local); 886 sta_info_stop(local); 887 rate_control_deinitialize(local); 888 889 if (skb_queue_len(&local->skb_queue) || 890 skb_queue_len(&local->skb_queue_unreliable)) 891 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 892 skb_queue_purge(&local->skb_queue); 893 skb_queue_purge(&local->skb_queue_unreliable); 894 895 destroy_workqueue(local->workqueue); 896 wiphy_unregister(local->hw.wiphy); 897 ieee80211_wep_free(local); 898 ieee80211_led_exit(local); 899 kfree(local->int_scan_req); 900} 901EXPORT_SYMBOL(ieee80211_unregister_hw); 902 903void ieee80211_free_hw(struct ieee80211_hw *hw) 904{ 905 struct ieee80211_local *local = hw_to_local(hw); 906 907 mutex_destroy(&local->iflist_mtx); 908 mutex_destroy(&local->mtx); 909 910 if (local->wiphy_ciphers_allocated) 911 kfree(local->hw.wiphy->cipher_suites); 912 913 wiphy_free(local->hw.wiphy); 914} 915EXPORT_SYMBOL(ieee80211_free_hw); 916 917static int __init ieee80211_init(void) 918{ 919 struct sk_buff *skb; 920 int ret; 921 922 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 923 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 924 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 925 926 ret = rc80211_minstrel_init(); 927 if (ret) 928 return ret; 929 930 ret = rc80211_minstrel_ht_init(); 931 if (ret) 932 goto err_minstrel; 933 934 ret = rc80211_pid_init(); 935 if (ret) 936 goto err_pid; 937 938 ret = ieee80211_iface_init(); 939 if (ret) 940 goto err_netdev; 941 942 return 0; 943 err_netdev: 944 rc80211_pid_exit(); 945 err_pid: 946 rc80211_minstrel_ht_exit(); 947 err_minstrel: 948 rc80211_minstrel_exit(); 949 950 return ret; 951} 952 953static void __exit ieee80211_exit(void) 954{ 955 rc80211_pid_exit(); 956 rc80211_minstrel_ht_exit(); 957 rc80211_minstrel_exit(); 958 959 /* 960 * For key todo, it'll be empty by now but the work 961 * might still be scheduled. 962 */ 963 flush_scheduled_work(); 964 965 if (mesh_allocated) 966 ieee80211s_stop(); 967 968 ieee80211_iface_exit(); 969} 970 971 972subsys_initcall(ieee80211_init); 973module_exit(ieee80211_exit); 974 975MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 976MODULE_LICENSE("GPL"); 977