main.c revision 4136c4224ccf1907d309e1cdfaefef9da97dbc5e
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 ieee80211_scan_cancel(local); 311 ieee80211_reconfig(local); 312 rtnl_unlock(); 313} 314 315void ieee80211_restart_hw(struct ieee80211_hw *hw) 316{ 317 struct ieee80211_local *local = hw_to_local(hw); 318 319 trace_api_restart_hw(local); 320 321 /* use this reason, ieee80211_reconfig will unblock it */ 322 ieee80211_stop_queues_by_reason(hw, 323 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 324 325 schedule_work(&local->restart_work); 326} 327EXPORT_SYMBOL(ieee80211_restart_hw); 328 329static void ieee80211_recalc_smps_work(struct work_struct *work) 330{ 331 struct ieee80211_local *local = 332 container_of(work, struct ieee80211_local, recalc_smps); 333 334 mutex_lock(&local->iflist_mtx); 335 ieee80211_recalc_smps(local); 336 mutex_unlock(&local->iflist_mtx); 337} 338 339#ifdef CONFIG_INET 340static int ieee80211_ifa_changed(struct notifier_block *nb, 341 unsigned long data, void *arg) 342{ 343 struct in_ifaddr *ifa = arg; 344 struct ieee80211_local *local = 345 container_of(nb, struct ieee80211_local, 346 ifa_notifier); 347 struct net_device *ndev = ifa->ifa_dev->dev; 348 struct wireless_dev *wdev = ndev->ieee80211_ptr; 349 struct in_device *idev; 350 struct ieee80211_sub_if_data *sdata; 351 struct ieee80211_bss_conf *bss_conf; 352 struct ieee80211_if_managed *ifmgd; 353 int c = 0; 354 355 /* Make sure it's our interface that got changed */ 356 if (!wdev) 357 return NOTIFY_DONE; 358 359 if (wdev->wiphy != local->hw.wiphy) 360 return NOTIFY_DONE; 361 362 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 363 bss_conf = &sdata->vif.bss_conf; 364 365 if (!ieee80211_sdata_running(sdata)) 366 return NOTIFY_DONE; 367 368 /* ARP filtering is only supported in managed mode */ 369 if (sdata->vif.type != NL80211_IFTYPE_STATION) 370 return NOTIFY_DONE; 371 372 idev = sdata->dev->ip_ptr; 373 if (!idev) 374 return NOTIFY_DONE; 375 376 ifmgd = &sdata->u.mgd; 377 mutex_lock(&ifmgd->mtx); 378 379 /* Copy the addresses to the bss_conf list */ 380 ifa = idev->ifa_list; 381 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 382 bss_conf->arp_addr_list[c] = ifa->ifa_address; 383 ifa = ifa->ifa_next; 384 c++; 385 } 386 387 /* If not all addresses fit the list, disable filtering */ 388 if (ifa) { 389 sdata->arp_filter_state = false; 390 c = 0; 391 } else { 392 sdata->arp_filter_state = true; 393 } 394 bss_conf->arp_addr_cnt = c; 395 396 /* Configure driver only if associated */ 397 if (ifmgd->associated) { 398 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 399 ieee80211_bss_info_change_notify(sdata, 400 BSS_CHANGED_ARP_FILTER); 401 } 402 403 mutex_unlock(&ifmgd->mtx); 404 405 return NOTIFY_DONE; 406} 407#endif 408 409static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 410{ 411 struct ieee80211_local *local = 412 container_of(napi, struct ieee80211_local, napi); 413 414 return local->ops->napi_poll(&local->hw, budget); 415} 416 417void ieee80211_napi_schedule(struct ieee80211_hw *hw) 418{ 419 struct ieee80211_local *local = hw_to_local(hw); 420 421 napi_schedule(&local->napi); 422} 423EXPORT_SYMBOL(ieee80211_napi_schedule); 424 425void ieee80211_napi_complete(struct ieee80211_hw *hw) 426{ 427 struct ieee80211_local *local = hw_to_local(hw); 428 429 napi_complete(&local->napi); 430} 431EXPORT_SYMBOL(ieee80211_napi_complete); 432 433/* There isn't a lot of sense in it, but you can transmit anything you like */ 434static const struct ieee80211_txrx_stypes 435ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 436 [NL80211_IFTYPE_ADHOC] = { 437 .tx = 0xffff, 438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4), 439 }, 440 [NL80211_IFTYPE_STATION] = { 441 .tx = 0xffff, 442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 443 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 444 }, 445 [NL80211_IFTYPE_AP] = { 446 .tx = 0xffff, 447 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 448 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 449 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 450 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 451 BIT(IEEE80211_STYPE_AUTH >> 4) | 452 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 453 BIT(IEEE80211_STYPE_ACTION >> 4), 454 }, 455 [NL80211_IFTYPE_AP_VLAN] = { 456 /* copy AP */ 457 .tx = 0xffff, 458 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 459 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 460 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 461 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 462 BIT(IEEE80211_STYPE_AUTH >> 4) | 463 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 464 BIT(IEEE80211_STYPE_ACTION >> 4), 465 }, 466 [NL80211_IFTYPE_P2P_CLIENT] = { 467 .tx = 0xffff, 468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 470 }, 471 [NL80211_IFTYPE_P2P_GO] = { 472 .tx = 0xffff, 473 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 474 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 475 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 476 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 477 BIT(IEEE80211_STYPE_AUTH >> 4) | 478 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 479 BIT(IEEE80211_STYPE_ACTION >> 4), 480 }, 481}; 482 483struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 484 const struct ieee80211_ops *ops) 485{ 486 struct ieee80211_local *local; 487 int priv_size, i; 488 struct wiphy *wiphy; 489 490 /* Ensure 32-byte alignment of our private data and hw private data. 491 * We use the wiphy priv data for both our ieee80211_local and for 492 * the driver's private data 493 * 494 * In memory it'll be like this: 495 * 496 * +-------------------------+ 497 * | struct wiphy | 498 * +-------------------------+ 499 * | struct ieee80211_local | 500 * +-------------------------+ 501 * | driver's private data | 502 * +-------------------------+ 503 * 504 */ 505 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 506 507 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 508 509 if (!wiphy) 510 return NULL; 511 512 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 513 514 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 515 WIPHY_FLAG_4ADDR_AP | 516 WIPHY_FLAG_4ADDR_STATION; 517 wiphy->privid = mac80211_wiphy_privid; 518 519 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 520 521 local = wiphy_priv(wiphy); 522 523 local->hw.wiphy = wiphy; 524 525 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 526 527 BUG_ON(!ops->tx); 528 BUG_ON(!ops->start); 529 BUG_ON(!ops->stop); 530 BUG_ON(!ops->config); 531 BUG_ON(!ops->add_interface); 532 BUG_ON(!ops->remove_interface); 533 BUG_ON(!ops->configure_filter); 534 local->ops = ops; 535 536 /* set up some defaults */ 537 local->hw.queues = 1; 538 local->hw.max_rates = 1; 539 local->hw.max_report_rates = 0; 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 if (hw->max_report_rates == 0) 616 hw->max_report_rates = hw->max_rates; 617 618 /* 619 * generic code guarantees at least one band, 620 * set this very early because much code assumes 621 * that hw.conf.channel is assigned 622 */ 623 channels = 0; 624 max_bitrates = 0; 625 supp_ht = false; 626 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 627 struct ieee80211_supported_band *sband; 628 629 sband = local->hw.wiphy->bands[band]; 630 if (!sband) 631 continue; 632 if (!local->oper_channel) { 633 /* init channel we're on */ 634 local->hw.conf.channel = 635 local->oper_channel = &sband->channels[0]; 636 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 637 } 638 channels += sband->n_channels; 639 640 if (max_bitrates < sband->n_bitrates) 641 max_bitrates = sband->n_bitrates; 642 supp_ht = supp_ht || sband->ht_cap.ht_supported; 643 } 644 645 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 646 sizeof(void *) * channels, GFP_KERNEL); 647 if (!local->int_scan_req) 648 return -ENOMEM; 649 650 /* if low-level driver supports AP, we also support VLAN */ 651 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 652 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 653 654 /* mac80211 always supports monitor */ 655 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 656 657#ifndef CONFIG_MAC80211_MESH 658 /* mesh depends on Kconfig, but drivers should set it if they want */ 659 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 660#endif 661 662 /* mac80211 supports control port protocol changing */ 663 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 664 665 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 666 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 667 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 668 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 669 670 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 671 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 672 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 673 674 /* 675 * Calculate scan IE length -- we need this to alloc 676 * memory and to subtract from the driver limit. It 677 * includes the (extended) supported rates and HT 678 * information -- SSID is the driver's responsibility. 679 */ 680 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 681 if (supp_ht) 682 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 683 684 if (!local->ops->hw_scan) { 685 /* For hw_scan, driver needs to set these up. */ 686 local->hw.wiphy->max_scan_ssids = 4; 687 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 688 } 689 690 /* 691 * If the driver supports any scan IEs, then assume the 692 * limit includes the IEs mac80211 will add, otherwise 693 * leave it at zero and let the driver sort it out; we 694 * still pass our IEs to the driver but userspace will 695 * not be allowed to in that case. 696 */ 697 if (local->hw.wiphy->max_scan_ie_len) 698 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 699 700 /* Set up cipher suites unless driver already did */ 701 if (!local->hw.wiphy->cipher_suites) { 702 local->hw.wiphy->cipher_suites = cipher_suites; 703 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 704 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 705 local->hw.wiphy->n_cipher_suites--; 706 } 707 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 708 if (local->hw.wiphy->cipher_suites == cipher_suites) { 709 local->hw.wiphy->cipher_suites += 2; 710 local->hw.wiphy->n_cipher_suites -= 2; 711 } else { 712 u32 *suites; 713 int r, w = 0; 714 715 /* Filter out WEP */ 716 717 suites = kmemdup( 718 local->hw.wiphy->cipher_suites, 719 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 720 GFP_KERNEL); 721 if (!suites) 722 return -ENOMEM; 723 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 724 u32 suite = local->hw.wiphy->cipher_suites[r]; 725 if (suite == WLAN_CIPHER_SUITE_WEP40 || 726 suite == WLAN_CIPHER_SUITE_WEP104) 727 continue; 728 suites[w++] = suite; 729 } 730 local->hw.wiphy->cipher_suites = suites; 731 local->hw.wiphy->n_cipher_suites = w; 732 local->wiphy_ciphers_allocated = true; 733 } 734 } 735 736 result = wiphy_register(local->hw.wiphy); 737 if (result < 0) 738 goto fail_wiphy_register; 739 740 /* 741 * We use the number of queues for feature tests (QoS, HT) internally 742 * so restrict them appropriately. 743 */ 744 if (hw->queues > IEEE80211_MAX_QUEUES) 745 hw->queues = IEEE80211_MAX_QUEUES; 746 747 local->workqueue = 748 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 749 if (!local->workqueue) { 750 result = -ENOMEM; 751 goto fail_workqueue; 752 } 753 754 /* 755 * The hardware needs headroom for sending the frame, 756 * and we need some headroom for passing the frame to monitor 757 * interfaces, but never both at the same time. 758 */ 759 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 760 sizeof(struct ieee80211_tx_status_rtap_hdr)); 761 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 762 sizeof(struct ieee80211_tx_status_rtap_hdr)); 763 764 debugfs_hw_add(local); 765 766 /* 767 * if the driver doesn't specify a max listen interval we 768 * use 5 which should be a safe default 769 */ 770 if (local->hw.max_listen_interval == 0) 771 local->hw.max_listen_interval = 5; 772 773 local->hw.conf.listen_interval = local->hw.max_listen_interval; 774 775 local->dynamic_ps_forced_timeout = -1; 776 777 result = sta_info_start(local); 778 if (result < 0) 779 goto fail_sta_info; 780 781 result = ieee80211_wep_init(local); 782 if (result < 0) 783 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 784 result); 785 786 rtnl_lock(); 787 788 result = ieee80211_init_rate_ctrl_alg(local, 789 hw->rate_control_algorithm); 790 if (result < 0) { 791 wiphy_debug(local->hw.wiphy, 792 "Failed to initialize rate control algorithm\n"); 793 goto fail_rate; 794 } 795 796 /* add one default STA interface if supported */ 797 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 798 result = ieee80211_if_add(local, "wlan%d", NULL, 799 NL80211_IFTYPE_STATION, NULL); 800 if (result) 801 wiphy_warn(local->hw.wiphy, 802 "Failed to add default virtual iface\n"); 803 } 804 805 rtnl_unlock(); 806 807 ieee80211_led_init(local); 808 809 local->network_latency_notifier.notifier_call = 810 ieee80211_max_network_latency; 811 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 812 &local->network_latency_notifier); 813 if (result) { 814 rtnl_lock(); 815 goto fail_pm_qos; 816 } 817 818#ifdef CONFIG_INET 819 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 820 result = register_inetaddr_notifier(&local->ifa_notifier); 821 if (result) 822 goto fail_ifa; 823#endif 824 825 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 826 local->hw.napi_weight); 827 828 return 0; 829 830#ifdef CONFIG_INET 831 fail_ifa: 832 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 833 &local->network_latency_notifier); 834 rtnl_lock(); 835#endif 836 fail_pm_qos: 837 ieee80211_led_exit(local); 838 ieee80211_remove_interfaces(local); 839 fail_rate: 840 rtnl_unlock(); 841 ieee80211_wep_free(local); 842 sta_info_stop(local); 843 fail_sta_info: 844 destroy_workqueue(local->workqueue); 845 fail_workqueue: 846 wiphy_unregister(local->hw.wiphy); 847 fail_wiphy_register: 848 if (local->wiphy_ciphers_allocated) 849 kfree(local->hw.wiphy->cipher_suites); 850 kfree(local->int_scan_req); 851 return result; 852} 853EXPORT_SYMBOL(ieee80211_register_hw); 854 855void ieee80211_unregister_hw(struct ieee80211_hw *hw) 856{ 857 struct ieee80211_local *local = hw_to_local(hw); 858 859 tasklet_kill(&local->tx_pending_tasklet); 860 tasklet_kill(&local->tasklet); 861 862 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 863 &local->network_latency_notifier); 864#ifdef CONFIG_INET 865 unregister_inetaddr_notifier(&local->ifa_notifier); 866#endif 867 868 rtnl_lock(); 869 870 /* 871 * At this point, interface list manipulations are fine 872 * because the driver cannot be handing us frames any 873 * more and the tasklet is killed. 874 */ 875 ieee80211_remove_interfaces(local); 876 877 rtnl_unlock(); 878 879 /* 880 * Now all work items will be gone, but the 881 * timer might still be armed, so delete it 882 */ 883 del_timer_sync(&local->work_timer); 884 885 cancel_work_sync(&local->restart_work); 886 cancel_work_sync(&local->reconfig_filter); 887 888 ieee80211_clear_tx_pending(local); 889 sta_info_stop(local); 890 rate_control_deinitialize(local); 891 892 if (skb_queue_len(&local->skb_queue) || 893 skb_queue_len(&local->skb_queue_unreliable)) 894 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 895 skb_queue_purge(&local->skb_queue); 896 skb_queue_purge(&local->skb_queue_unreliable); 897 898 destroy_workqueue(local->workqueue); 899 wiphy_unregister(local->hw.wiphy); 900 ieee80211_wep_free(local); 901 ieee80211_led_exit(local); 902 kfree(local->int_scan_req); 903} 904EXPORT_SYMBOL(ieee80211_unregister_hw); 905 906void ieee80211_free_hw(struct ieee80211_hw *hw) 907{ 908 struct ieee80211_local *local = hw_to_local(hw); 909 910 mutex_destroy(&local->iflist_mtx); 911 mutex_destroy(&local->mtx); 912 913 if (local->wiphy_ciphers_allocated) 914 kfree(local->hw.wiphy->cipher_suites); 915 916 wiphy_free(local->hw.wiphy); 917} 918EXPORT_SYMBOL(ieee80211_free_hw); 919 920static int __init ieee80211_init(void) 921{ 922 struct sk_buff *skb; 923 int ret; 924 925 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 926 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 927 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 928 929 ret = rc80211_minstrel_init(); 930 if (ret) 931 return ret; 932 933 ret = rc80211_minstrel_ht_init(); 934 if (ret) 935 goto err_minstrel; 936 937 ret = rc80211_pid_init(); 938 if (ret) 939 goto err_pid; 940 941 ret = ieee80211_iface_init(); 942 if (ret) 943 goto err_netdev; 944 945 return 0; 946 err_netdev: 947 rc80211_pid_exit(); 948 err_pid: 949 rc80211_minstrel_ht_exit(); 950 err_minstrel: 951 rc80211_minstrel_exit(); 952 953 return ret; 954} 955 956static void __exit ieee80211_exit(void) 957{ 958 rc80211_pid_exit(); 959 rc80211_minstrel_ht_exit(); 960 rc80211_minstrel_exit(); 961 962 /* 963 * For key todo, it'll be empty by now but the work 964 * might still be scheduled. 965 */ 966 flush_scheduled_work(); 967 968 if (mesh_allocated) 969 ieee80211s_stop(); 970 971 ieee80211_iface_exit(); 972} 973 974 975subsys_initcall(ieee80211_init); 976module_exit(ieee80211_exit); 977 978MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 979MODULE_LICENSE("GPL"); 980