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 37 bool ieee80211_disable_40mhz_24ghz; 38 module_param(ieee80211_disable_40mhz_24ghz, bool, 0644); 39 MODULE_PARM_DESC(ieee80211_disable_40mhz_24ghz, 40 "Disable 40MHz support in the 2.4GHz band"); 41 42 void 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_probe_req || local->probe_req_reg) 58 new_flags |= FIF_PROBE_REQ; 59 60 if (local->fif_fcsfail) 61 new_flags |= FIF_FCSFAIL; 62 63 if (local->fif_plcpfail) 64 new_flags |= FIF_PLCPFAIL; 65 66 if (local->fif_control) 67 new_flags |= FIF_CONTROL; 68 69 if (local->fif_other_bss) 70 new_flags |= FIF_OTHER_BSS; 71 72 if (local->fif_pspoll) 73 new_flags |= FIF_PSPOLL; 74 75 spin_lock_bh(&local->filter_lock); 76 changed_flags = local->filter_flags ^ new_flags; 77 78 mc = drv_prepare_multicast(local, &local->mc_list); 79 spin_unlock_bh(&local->filter_lock); 80 81 /* be a bit nasty */ 82 new_flags |= (1<<31); 83 84 drv_configure_filter(local, changed_flags, &new_flags, mc); 85 86 WARN_ON(new_flags & (1<<31)); 87 88 local->filter_flags = new_flags & ~(1<<31); 89 } 90 91 static void ieee80211_reconfig_filter(struct work_struct *work) 92 { 93 struct ieee80211_local *local = 94 container_of(work, struct ieee80211_local, reconfig_filter); 95 96 ieee80211_configure_filter(local); 97 } 98 99 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 100 { 101 struct ieee80211_channel *chan, *scan_chan; 102 int ret = 0; 103 int power; 104 enum nl80211_channel_type channel_type; 105 u32 offchannel_flag; 106 107 might_sleep(); 108 109 scan_chan = local->scan_channel; 110 111 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 112 if (scan_chan) { 113 chan = scan_chan; 114 channel_type = NL80211_CHAN_NO_HT; 115 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 116 } else if (local->tmp_channel && 117 local->oper_channel != local->tmp_channel) { 118 chan = scan_chan = local->tmp_channel; 119 channel_type = local->tmp_channel_type; 120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 121 } else { 122 chan = local->oper_channel; 123 channel_type = local->_oper_channel_type; 124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 125 } 126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 127 128 if (offchannel_flag || chan != local->hw.conf.channel || 129 channel_type != local->hw.conf.channel_type) { 130 local->hw.conf.channel = chan; 131 local->hw.conf.channel_type = channel_type; 132 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 133 } 134 135 if (!conf_is_ht(&local->hw.conf)) { 136 /* 137 * mac80211.h documents that this is only valid 138 * when the channel is set to an HT type, and 139 * that otherwise STATIC is used. 140 */ 141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 142 } else if (local->hw.conf.smps_mode != local->smps_mode) { 143 local->hw.conf.smps_mode = local->smps_mode; 144 changed |= IEEE80211_CONF_CHANGE_SMPS; 145 } 146 147 if (scan_chan) 148 power = chan->max_power; 149 else 150 power = local->power_constr_level ? 151 (chan->max_power - local->power_constr_level) : 152 chan->max_power; 153 154 if (local->user_power_level >= 0) 155 power = min(power, local->user_power_level); 156 157 if (local->hw.conf.power_level != power) { 158 changed |= IEEE80211_CONF_CHANGE_POWER; 159 local->hw.conf.power_level = power; 160 } 161 162 if (changed && local->open_count) { 163 ret = drv_config(local, changed); 164 /* 165 * Goal: 166 * HW reconfiguration should never fail, the driver has told 167 * us what it can support so it should live up to that promise. 168 * 169 * Current status: 170 * rfkill is not integrated with mac80211 and a 171 * configuration command can thus fail if hardware rfkill 172 * is enabled 173 * 174 * FIXME: integrate rfkill with mac80211 and then add this 175 * WARN_ON() back 176 * 177 */ 178 /* WARN_ON(ret); */ 179 } 180 181 return ret; 182 } 183 184 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 185 u32 changed) 186 { 187 struct ieee80211_local *local = sdata->local; 188 static const u8 zero[ETH_ALEN] = { 0 }; 189 190 if (!changed) 191 return; 192 193 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 194 /* 195 * While not associated, claim a BSSID of all-zeroes 196 * so that drivers don't do any weird things with the 197 * BSSID at that time. 198 */ 199 if (sdata->vif.bss_conf.assoc) 200 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 201 else 202 sdata->vif.bss_conf.bssid = zero; 203 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 204 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 205 else if (sdata->vif.type == NL80211_IFTYPE_AP) 206 sdata->vif.bss_conf.bssid = sdata->vif.addr; 207 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 208 sdata->vif.bss_conf.bssid = NULL; 209 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 210 sdata->vif.bss_conf.bssid = zero; 211 } else { 212 WARN_ON(1); 213 return; 214 } 215 216 switch (sdata->vif.type) { 217 case NL80211_IFTYPE_AP: 218 case NL80211_IFTYPE_ADHOC: 219 case NL80211_IFTYPE_WDS: 220 case NL80211_IFTYPE_MESH_POINT: 221 break; 222 default: 223 /* do not warn to simplify caller in scan.c */ 224 changed &= ~BSS_CHANGED_BEACON_ENABLED; 225 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 226 return; 227 break; 228 } 229 230 if (changed & BSS_CHANGED_BEACON_ENABLED) { 231 if (local->quiescing || !ieee80211_sdata_running(sdata) || 232 test_bit(SCAN_SW_SCANNING, &local->scanning)) { 233 sdata->vif.bss_conf.enable_beacon = false; 234 } else { 235 /* 236 * Beacon should be enabled, but AP mode must 237 * check whether there is a beacon configured. 238 */ 239 switch (sdata->vif.type) { 240 case NL80211_IFTYPE_AP: 241 sdata->vif.bss_conf.enable_beacon = 242 !!sdata->u.ap.beacon; 243 break; 244 case NL80211_IFTYPE_ADHOC: 245 sdata->vif.bss_conf.enable_beacon = 246 !!sdata->u.ibss.presp; 247 break; 248 case NL80211_IFTYPE_MESH_POINT: 249 sdata->vif.bss_conf.enable_beacon = true; 250 break; 251 default: 252 /* not reached */ 253 WARN_ON(1); 254 break; 255 } 256 } 257 } 258 259 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 260 } 261 262 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 263 { 264 sdata->vif.bss_conf.use_cts_prot = false; 265 sdata->vif.bss_conf.use_short_preamble = false; 266 sdata->vif.bss_conf.use_short_slot = false; 267 return BSS_CHANGED_ERP_CTS_PROT | 268 BSS_CHANGED_ERP_PREAMBLE | 269 BSS_CHANGED_ERP_SLOT; 270 } 271 272 static void ieee80211_tasklet_handler(unsigned long data) 273 { 274 struct ieee80211_local *local = (struct ieee80211_local *) data; 275 struct sk_buff *skb; 276 277 while ((skb = skb_dequeue(&local->skb_queue)) || 278 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 279 switch (skb->pkt_type) { 280 case IEEE80211_RX_MSG: 281 /* Clear skb->pkt_type in order to not confuse kernel 282 * netstack. */ 283 skb->pkt_type = 0; 284 ieee80211_rx(local_to_hw(local), skb); 285 break; 286 case IEEE80211_TX_STATUS_MSG: 287 skb->pkt_type = 0; 288 ieee80211_tx_status(local_to_hw(local), skb); 289 break; 290 default: 291 WARN(1, "mac80211: Packet is of unknown type %d\n", 292 skb->pkt_type); 293 dev_kfree_skb(skb); 294 break; 295 } 296 } 297 } 298 299 static void ieee80211_restart_work(struct work_struct *work) 300 { 301 struct ieee80211_local *local = 302 container_of(work, struct ieee80211_local, restart_work); 303 304 /* wait for scan work complete */ 305 flush_workqueue(local->workqueue); 306 307 mutex_lock(&local->mtx); 308 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 309 "%s called with hardware scan in progress\n", __func__); 310 mutex_unlock(&local->mtx); 311 312 rtnl_lock(); 313 ieee80211_scan_cancel(local); 314 ieee80211_reconfig(local); 315 rtnl_unlock(); 316 } 317 318 void ieee80211_restart_hw(struct ieee80211_hw *hw) 319 { 320 struct ieee80211_local *local = hw_to_local(hw); 321 322 trace_api_restart_hw(local); 323 324 /* use this reason, ieee80211_reconfig will unblock it */ 325 ieee80211_stop_queues_by_reason(hw, 326 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 327 328 schedule_work(&local->restart_work); 329 } 330 EXPORT_SYMBOL(ieee80211_restart_hw); 331 332 static void ieee80211_recalc_smps_work(struct work_struct *work) 333 { 334 struct ieee80211_local *local = 335 container_of(work, struct ieee80211_local, recalc_smps); 336 337 mutex_lock(&local->iflist_mtx); 338 ieee80211_recalc_smps(local); 339 mutex_unlock(&local->iflist_mtx); 340 } 341 342 #ifdef CONFIG_INET 343 static int ieee80211_ifa_changed(struct notifier_block *nb, 344 unsigned long data, void *arg) 345 { 346 struct in_ifaddr *ifa = arg; 347 struct ieee80211_local *local = 348 container_of(nb, struct ieee80211_local, 349 ifa_notifier); 350 struct net_device *ndev = ifa->ifa_dev->dev; 351 struct wireless_dev *wdev = ndev->ieee80211_ptr; 352 struct in_device *idev; 353 struct ieee80211_sub_if_data *sdata; 354 struct ieee80211_bss_conf *bss_conf; 355 struct ieee80211_if_managed *ifmgd; 356 int c = 0; 357 358 /* Make sure it's our interface that got changed */ 359 if (!wdev) 360 return NOTIFY_DONE; 361 362 if (wdev->wiphy != local->hw.wiphy) 363 return NOTIFY_DONE; 364 365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 366 bss_conf = &sdata->vif.bss_conf; 367 368 if (!ieee80211_sdata_running(sdata)) 369 return NOTIFY_DONE; 370 371 /* ARP filtering is only supported in managed mode */ 372 if (sdata->vif.type != NL80211_IFTYPE_STATION) 373 return NOTIFY_DONE; 374 375 idev = __in_dev_get_rtnl(sdata->dev); 376 if (!idev) 377 return NOTIFY_DONE; 378 379 ifmgd = &sdata->u.mgd; 380 mutex_lock(&ifmgd->mtx); 381 382 /* Copy the addresses to the bss_conf list */ 383 ifa = idev->ifa_list; 384 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 385 bss_conf->arp_addr_list[c] = ifa->ifa_address; 386 ifa = ifa->ifa_next; 387 c++; 388 } 389 390 /* If not all addresses fit the list, disable filtering */ 391 if (ifa) { 392 sdata->arp_filter_state = false; 393 c = 0; 394 } else { 395 sdata->arp_filter_state = true; 396 } 397 bss_conf->arp_addr_cnt = c; 398 399 /* Configure driver only if associated */ 400 if (ifmgd->associated) { 401 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 402 ieee80211_bss_info_change_notify(sdata, 403 BSS_CHANGED_ARP_FILTER); 404 } 405 406 mutex_unlock(&ifmgd->mtx); 407 408 return NOTIFY_DONE; 409 } 410 #endif 411 412 static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 413 { 414 struct ieee80211_local *local = 415 container_of(napi, struct ieee80211_local, napi); 416 417 return local->ops->napi_poll(&local->hw, budget); 418 } 419 420 void ieee80211_napi_schedule(struct ieee80211_hw *hw) 421 { 422 struct ieee80211_local *local = hw_to_local(hw); 423 424 napi_schedule(&local->napi); 425 } 426 EXPORT_SYMBOL(ieee80211_napi_schedule); 427 428 void ieee80211_napi_complete(struct ieee80211_hw *hw) 429 { 430 struct ieee80211_local *local = hw_to_local(hw); 431 432 napi_complete(&local->napi); 433 } 434 EXPORT_SYMBOL(ieee80211_napi_complete); 435 436 /* There isn't a lot of sense in it, but you can transmit anything you like */ 437 static const struct ieee80211_txrx_stypes 438 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 439 [NL80211_IFTYPE_ADHOC] = { 440 .tx = 0xffff, 441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4), 442 }, 443 [NL80211_IFTYPE_STATION] = { 444 .tx = 0xffff, 445 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 446 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 447 }, 448 [NL80211_IFTYPE_AP] = { 449 .tx = 0xffff, 450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 453 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 454 BIT(IEEE80211_STYPE_AUTH >> 4) | 455 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 456 BIT(IEEE80211_STYPE_ACTION >> 4), 457 }, 458 [NL80211_IFTYPE_AP_VLAN] = { 459 /* copy AP */ 460 .tx = 0xffff, 461 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 462 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 463 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 464 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 465 BIT(IEEE80211_STYPE_AUTH >> 4) | 466 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 467 BIT(IEEE80211_STYPE_ACTION >> 4), 468 }, 469 [NL80211_IFTYPE_P2P_CLIENT] = { 470 .tx = 0xffff, 471 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 473 }, 474 [NL80211_IFTYPE_P2P_GO] = { 475 .tx = 0xffff, 476 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 477 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 478 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 479 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 480 BIT(IEEE80211_STYPE_AUTH >> 4) | 481 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 482 BIT(IEEE80211_STYPE_ACTION >> 4), 483 }, 484 }; 485 486 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 487 const struct ieee80211_ops *ops) 488 { 489 struct ieee80211_local *local; 490 int priv_size, i; 491 struct wiphy *wiphy; 492 493 /* Ensure 32-byte alignment of our private data and hw private data. 494 * We use the wiphy priv data for both our ieee80211_local and for 495 * the driver's private data 496 * 497 * In memory it'll be like this: 498 * 499 * +-------------------------+ 500 * | struct wiphy | 501 * +-------------------------+ 502 * | struct ieee80211_local | 503 * +-------------------------+ 504 * | driver's private data | 505 * +-------------------------+ 506 * 507 */ 508 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 509 510 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 511 512 if (!wiphy) 513 return NULL; 514 515 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 516 517 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 518 WIPHY_FLAG_4ADDR_AP | 519 WIPHY_FLAG_4ADDR_STATION; 520 wiphy->privid = mac80211_wiphy_privid; 521 522 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 523 524 local = wiphy_priv(wiphy); 525 526 local->hw.wiphy = wiphy; 527 528 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 529 530 BUG_ON(!ops->tx); 531 BUG_ON(!ops->start); 532 BUG_ON(!ops->stop); 533 BUG_ON(!ops->config); 534 BUG_ON(!ops->add_interface); 535 BUG_ON(!ops->remove_interface); 536 BUG_ON(!ops->configure_filter); 537 local->ops = ops; 538 539 /* set up some defaults */ 540 local->hw.queues = 1; 541 local->hw.max_rates = 1; 542 local->hw.max_report_rates = 0; 543 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 544 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 545 local->user_power_level = -1; 546 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 547 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 548 549 INIT_LIST_HEAD(&local->interfaces); 550 551 __hw_addr_init(&local->mc_list); 552 553 mutex_init(&local->iflist_mtx); 554 mutex_init(&local->mtx); 555 556 mutex_init(&local->key_mtx); 557 spin_lock_init(&local->filter_lock); 558 spin_lock_init(&local->queue_stop_reason_lock); 559 560 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 561 562 ieee80211_work_init(local); 563 564 INIT_WORK(&local->restart_work, ieee80211_restart_work); 565 566 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 567 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 568 local->smps_mode = IEEE80211_SMPS_OFF; 569 570 INIT_WORK(&local->dynamic_ps_enable_work, 571 ieee80211_dynamic_ps_enable_work); 572 INIT_WORK(&local->dynamic_ps_disable_work, 573 ieee80211_dynamic_ps_disable_work); 574 setup_timer(&local->dynamic_ps_timer, 575 ieee80211_dynamic_ps_timer, (unsigned long) local); 576 577 sta_info_init(local); 578 579 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 580 skb_queue_head_init(&local->pending[i]); 581 atomic_set(&local->agg_queue_stop[i], 0); 582 } 583 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 584 (unsigned long)local); 585 586 tasklet_init(&local->tasklet, 587 ieee80211_tasklet_handler, 588 (unsigned long) local); 589 590 skb_queue_head_init(&local->skb_queue); 591 skb_queue_head_init(&local->skb_queue_unreliable); 592 593 /* init dummy netdev for use w/ NAPI */ 594 init_dummy_netdev(&local->napi_dev); 595 596 return local_to_hw(local); 597 } 598 EXPORT_SYMBOL(ieee80211_alloc_hw); 599 600 int ieee80211_register_hw(struct ieee80211_hw *hw) 601 { 602 struct ieee80211_local *local = hw_to_local(hw); 603 int result; 604 enum ieee80211_band band; 605 int channels, max_bitrates; 606 bool supp_ht; 607 static const u32 cipher_suites[] = { 608 /* keep WEP first, it may be removed below */ 609 WLAN_CIPHER_SUITE_WEP40, 610 WLAN_CIPHER_SUITE_WEP104, 611 WLAN_CIPHER_SUITE_TKIP, 612 WLAN_CIPHER_SUITE_CCMP, 613 614 /* keep last -- depends on hw flags! */ 615 WLAN_CIPHER_SUITE_AES_CMAC 616 }; 617 618 if (hw->max_report_rates == 0) 619 hw->max_report_rates = hw->max_rates; 620 621 /* 622 * generic code guarantees at least one band, 623 * set this very early because much code assumes 624 * that hw.conf.channel is assigned 625 */ 626 channels = 0; 627 max_bitrates = 0; 628 supp_ht = false; 629 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 630 struct ieee80211_supported_band *sband; 631 632 sband = local->hw.wiphy->bands[band]; 633 if (!sband) 634 continue; 635 if (!local->oper_channel) { 636 /* init channel we're on */ 637 local->hw.conf.channel = 638 local->oper_channel = &sband->channels[0]; 639 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 640 } 641 channels += sband->n_channels; 642 643 if (max_bitrates < sband->n_bitrates) 644 max_bitrates = sband->n_bitrates; 645 supp_ht = supp_ht || sband->ht_cap.ht_supported; 646 } 647 648 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 649 sizeof(void *) * channels, GFP_KERNEL); 650 if (!local->int_scan_req) 651 return -ENOMEM; 652 653 /* if low-level driver supports AP, we also support VLAN */ 654 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) 655 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 656 657 /* mac80211 always supports monitor */ 658 local->hw.wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 659 660 #ifndef CONFIG_MAC80211_MESH 661 /* mesh depends on Kconfig, but drivers should set it if they want */ 662 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 663 #endif 664 665 /* mac80211 supports control port protocol changing */ 666 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 667 668 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 669 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 670 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 671 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 672 673 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 674 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 675 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 676 677 /* 678 * Calculate scan IE length -- we need this to alloc 679 * memory and to subtract from the driver limit. It 680 * includes the (extended) supported rates and HT 681 * information -- SSID is the driver's responsibility. 682 */ 683 local->scan_ies_len = 4 + max_bitrates; /* (ext) supp rates */ 684 if (supp_ht) 685 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 686 687 if (!local->ops->hw_scan) { 688 /* For hw_scan, driver needs to set these up. */ 689 local->hw.wiphy->max_scan_ssids = 4; 690 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 691 } 692 693 /* 694 * If the driver supports any scan IEs, then assume the 695 * limit includes the IEs mac80211 will add, otherwise 696 * leave it at zero and let the driver sort it out; we 697 * still pass our IEs to the driver but userspace will 698 * not be allowed to in that case. 699 */ 700 if (local->hw.wiphy->max_scan_ie_len) 701 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 702 703 /* Set up cipher suites unless driver already did */ 704 if (!local->hw.wiphy->cipher_suites) { 705 local->hw.wiphy->cipher_suites = cipher_suites; 706 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 707 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 708 local->hw.wiphy->n_cipher_suites--; 709 } 710 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 711 if (local->hw.wiphy->cipher_suites == cipher_suites) { 712 local->hw.wiphy->cipher_suites += 2; 713 local->hw.wiphy->n_cipher_suites -= 2; 714 } else { 715 u32 *suites; 716 int r, w = 0; 717 718 /* Filter out WEP */ 719 720 suites = kmemdup( 721 local->hw.wiphy->cipher_suites, 722 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 723 GFP_KERNEL); 724 if (!suites) 725 return -ENOMEM; 726 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 727 u32 suite = local->hw.wiphy->cipher_suites[r]; 728 if (suite == WLAN_CIPHER_SUITE_WEP40 || 729 suite == WLAN_CIPHER_SUITE_WEP104) 730 continue; 731 suites[w++] = suite; 732 } 733 local->hw.wiphy->cipher_suites = suites; 734 local->hw.wiphy->n_cipher_suites = w; 735 local->wiphy_ciphers_allocated = true; 736 } 737 } 738 739 result = wiphy_register(local->hw.wiphy); 740 if (result < 0) 741 goto fail_wiphy_register; 742 743 /* 744 * We use the number of queues for feature tests (QoS, HT) internally 745 * so restrict them appropriately. 746 */ 747 if (hw->queues > IEEE80211_MAX_QUEUES) 748 hw->queues = IEEE80211_MAX_QUEUES; 749 750 local->workqueue = 751 create_singlethread_workqueue(wiphy_name(local->hw.wiphy)); 752 if (!local->workqueue) { 753 result = -ENOMEM; 754 goto fail_workqueue; 755 } 756 757 /* 758 * The hardware needs headroom for sending the frame, 759 * and we need some headroom for passing the frame to monitor 760 * interfaces, but never both at the same time. 761 */ 762 BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != 763 sizeof(struct ieee80211_tx_status_rtap_hdr)); 764 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 765 sizeof(struct ieee80211_tx_status_rtap_hdr)); 766 767 debugfs_hw_add(local); 768 769 /* 770 * if the driver doesn't specify a max listen interval we 771 * use 5 which should be a safe default 772 */ 773 if (local->hw.max_listen_interval == 0) 774 local->hw.max_listen_interval = 5; 775 776 local->hw.conf.listen_interval = local->hw.max_listen_interval; 777 778 local->dynamic_ps_forced_timeout = -1; 779 780 result = sta_info_start(local); 781 if (result < 0) 782 goto fail_sta_info; 783 784 result = ieee80211_wep_init(local); 785 if (result < 0) 786 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 787 result); 788 789 rtnl_lock(); 790 791 result = ieee80211_init_rate_ctrl_alg(local, 792 hw->rate_control_algorithm); 793 if (result < 0) { 794 wiphy_debug(local->hw.wiphy, 795 "Failed to initialize rate control algorithm\n"); 796 goto fail_rate; 797 } 798 799 /* add one default STA interface if supported */ 800 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 801 result = ieee80211_if_add(local, "wlan%d", NULL, 802 NL80211_IFTYPE_STATION, NULL); 803 if (result) 804 wiphy_warn(local->hw.wiphy, 805 "Failed to add default virtual iface\n"); 806 } 807 808 rtnl_unlock(); 809 810 ieee80211_led_init(local); 811 812 local->network_latency_notifier.notifier_call = 813 ieee80211_max_network_latency; 814 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 815 &local->network_latency_notifier); 816 if (result) { 817 rtnl_lock(); 818 goto fail_pm_qos; 819 } 820 821 #ifdef CONFIG_INET 822 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 823 result = register_inetaddr_notifier(&local->ifa_notifier); 824 if (result) 825 goto fail_ifa; 826 #endif 827 828 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 829 local->hw.napi_weight); 830 831 return 0; 832 833 #ifdef CONFIG_INET 834 fail_ifa: 835 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 836 &local->network_latency_notifier); 837 rtnl_lock(); 838 #endif 839 fail_pm_qos: 840 ieee80211_led_exit(local); 841 ieee80211_remove_interfaces(local); 842 fail_rate: 843 rtnl_unlock(); 844 ieee80211_wep_free(local); 845 sta_info_stop(local); 846 fail_sta_info: 847 destroy_workqueue(local->workqueue); 848 fail_workqueue: 849 wiphy_unregister(local->hw.wiphy); 850 fail_wiphy_register: 851 if (local->wiphy_ciphers_allocated) 852 kfree(local->hw.wiphy->cipher_suites); 853 kfree(local->int_scan_req); 854 return result; 855 } 856 EXPORT_SYMBOL(ieee80211_register_hw); 857 858 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 859 { 860 struct ieee80211_local *local = hw_to_local(hw); 861 862 tasklet_kill(&local->tx_pending_tasklet); 863 tasklet_kill(&local->tasklet); 864 865 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 866 &local->network_latency_notifier); 867 #ifdef CONFIG_INET 868 unregister_inetaddr_notifier(&local->ifa_notifier); 869 #endif 870 871 rtnl_lock(); 872 873 /* 874 * At this point, interface list manipulations are fine 875 * because the driver cannot be handing us frames any 876 * more and the tasklet is killed. 877 */ 878 ieee80211_remove_interfaces(local); 879 880 rtnl_unlock(); 881 882 /* 883 * Now all work items will be gone, but the 884 * timer might still be armed, so delete it 885 */ 886 del_timer_sync(&local->work_timer); 887 888 cancel_work_sync(&local->restart_work); 889 cancel_work_sync(&local->reconfig_filter); 890 891 ieee80211_clear_tx_pending(local); 892 sta_info_stop(local); 893 rate_control_deinitialize(local); 894 895 if (skb_queue_len(&local->skb_queue) || 896 skb_queue_len(&local->skb_queue_unreliable)) 897 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 898 skb_queue_purge(&local->skb_queue); 899 skb_queue_purge(&local->skb_queue_unreliable); 900 901 destroy_workqueue(local->workqueue); 902 wiphy_unregister(local->hw.wiphy); 903 ieee80211_wep_free(local); 904 ieee80211_led_exit(local); 905 kfree(local->int_scan_req); 906 } 907 EXPORT_SYMBOL(ieee80211_unregister_hw); 908 909 void ieee80211_free_hw(struct ieee80211_hw *hw) 910 { 911 struct ieee80211_local *local = hw_to_local(hw); 912 913 mutex_destroy(&local->iflist_mtx); 914 mutex_destroy(&local->mtx); 915 916 if (local->wiphy_ciphers_allocated) 917 kfree(local->hw.wiphy->cipher_suites); 918 919 wiphy_free(local->hw.wiphy); 920 } 921 EXPORT_SYMBOL(ieee80211_free_hw); 922 923 static int __init ieee80211_init(void) 924 { 925 struct sk_buff *skb; 926 int ret; 927 928 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 929 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 930 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 931 932 ret = rc80211_minstrel_init(); 933 if (ret) 934 return ret; 935 936 ret = rc80211_minstrel_ht_init(); 937 if (ret) 938 goto err_minstrel; 939 940 ret = rc80211_pid_init(); 941 if (ret) 942 goto err_pid; 943 944 ret = ieee80211_iface_init(); 945 if (ret) 946 goto err_netdev; 947 948 return 0; 949 err_netdev: 950 rc80211_pid_exit(); 951 err_pid: 952 rc80211_minstrel_ht_exit(); 953 err_minstrel: 954 rc80211_minstrel_exit(); 955 956 return ret; 957 } 958 959 static void __exit ieee80211_exit(void) 960 { 961 rc80211_pid_exit(); 962 rc80211_minstrel_ht_exit(); 963 rc80211_minstrel_exit(); 964 965 /* 966 * For key todo, it'll be empty by now but the work 967 * might still be scheduled. 968 */ 969 flush_scheduled_work(); 970 971 if (mesh_allocated) 972 ieee80211s_stop(); 973 974 ieee80211_iface_exit(); 975 } 976 977 978 subsys_initcall(ieee80211_init); 979 module_exit(ieee80211_exit); 980 981 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 982 MODULE_LICENSE("GPL"); 983