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.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 static struct lock_class_key ieee80211_rx_skb_queue_class; 37 38 void ieee80211_configure_filter(struct ieee80211_local *local) 39 { 40 u64 mc; 41 unsigned int changed_flags; 42 unsigned int new_flags = 0; 43 44 if (atomic_read(&local->iff_promiscs)) 45 new_flags |= FIF_PROMISC_IN_BSS; 46 47 if (atomic_read(&local->iff_allmultis)) 48 new_flags |= FIF_ALLMULTI; 49 50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning)) 51 new_flags |= FIF_BCN_PRBRESP_PROMISC; 52 53 if (local->fif_probe_req || local->probe_req_reg) 54 new_flags |= FIF_PROBE_REQ; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 96 { 97 struct ieee80211_channel *chan; 98 int ret = 0; 99 int power; 100 enum nl80211_channel_type channel_type; 101 u32 offchannel_flag; 102 103 might_sleep(); 104 105 /* If this off-channel logic ever changes, ieee80211_on_oper_channel 106 * may need to change as well. 107 */ 108 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 109 if (local->scan_channel) { 110 chan = local->scan_channel; 111 /* If scanning on oper channel, use whatever channel-type 112 * is currently in use. 113 */ 114 if (chan == local->oper_channel) 115 channel_type = local->_oper_channel_type; 116 else 117 channel_type = NL80211_CHAN_NO_HT; 118 } else if (local->tmp_channel) { 119 chan = local->tmp_channel; 120 channel_type = local->tmp_channel_type; 121 } else { 122 chan = local->oper_channel; 123 channel_type = local->_oper_channel_type; 124 } 125 126 if (chan != local->oper_channel || 127 channel_type != local->_oper_channel_type) 128 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 129 else 130 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 131 132 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 133 134 if (offchannel_flag || chan != local->hw.conf.channel || 135 channel_type != local->hw.conf.channel_type) { 136 local->hw.conf.channel = chan; 137 local->hw.conf.channel_type = channel_type; 138 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 139 } 140 141 if (!conf_is_ht(&local->hw.conf)) { 142 /* 143 * mac80211.h documents that this is only valid 144 * when the channel is set to an HT type, and 145 * that otherwise STATIC is used. 146 */ 147 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 148 } else if (local->hw.conf.smps_mode != local->smps_mode) { 149 local->hw.conf.smps_mode = local->smps_mode; 150 changed |= IEEE80211_CONF_CHANGE_SMPS; 151 } 152 153 if (test_bit(SCAN_SW_SCANNING, &local->scanning) || 154 test_bit(SCAN_HW_SCANNING, &local->scanning)) 155 power = chan->max_power; 156 else 157 power = local->power_constr_level ? 158 (chan->max_power - local->power_constr_level) : 159 chan->max_power; 160 161 if (local->user_power_level >= 0) 162 power = min(power, local->user_power_level); 163 164 if (local->hw.conf.power_level != power) { 165 changed |= IEEE80211_CONF_CHANGE_POWER; 166 local->hw.conf.power_level = power; 167 } 168 169 if (changed && local->open_count) { 170 ret = drv_config(local, changed); 171 /* 172 * Goal: 173 * HW reconfiguration should never fail, the driver has told 174 * us what it can support so it should live up to that promise. 175 * 176 * Current status: 177 * rfkill is not integrated with mac80211 and a 178 * configuration command can thus fail if hardware rfkill 179 * is enabled 180 * 181 * FIXME: integrate rfkill with mac80211 and then add this 182 * WARN_ON() back 183 * 184 */ 185 /* WARN_ON(ret); */ 186 } 187 188 return ret; 189 } 190 191 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 192 u32 changed) 193 { 194 struct ieee80211_local *local = sdata->local; 195 static const u8 zero[ETH_ALEN] = { 0 }; 196 197 if (!changed) 198 return; 199 200 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 201 /* 202 * While not associated, claim a BSSID of all-zeroes 203 * so that drivers don't do any weird things with the 204 * BSSID at that time. 205 */ 206 if (sdata->vif.bss_conf.assoc) 207 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 208 else 209 sdata->vif.bss_conf.bssid = zero; 210 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 211 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 212 else if (sdata->vif.type == NL80211_IFTYPE_AP) 213 sdata->vif.bss_conf.bssid = sdata->vif.addr; 214 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 215 sdata->vif.bss_conf.bssid = NULL; 216 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 217 sdata->vif.bss_conf.bssid = zero; 218 } else { 219 WARN_ON(1); 220 return; 221 } 222 223 switch (sdata->vif.type) { 224 case NL80211_IFTYPE_AP: 225 case NL80211_IFTYPE_ADHOC: 226 case NL80211_IFTYPE_WDS: 227 case NL80211_IFTYPE_MESH_POINT: 228 break; 229 default: 230 /* do not warn to simplify caller in scan.c */ 231 changed &= ~BSS_CHANGED_BEACON_ENABLED; 232 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 233 return; 234 break; 235 } 236 237 if (changed & BSS_CHANGED_BEACON_ENABLED) { 238 if (local->quiescing || !ieee80211_sdata_running(sdata) || 239 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) { 240 sdata->vif.bss_conf.enable_beacon = false; 241 } else { 242 /* 243 * Beacon should be enabled, but AP mode must 244 * check whether there is a beacon configured. 245 */ 246 switch (sdata->vif.type) { 247 case NL80211_IFTYPE_AP: 248 sdata->vif.bss_conf.enable_beacon = 249 !!sdata->u.ap.beacon; 250 break; 251 case NL80211_IFTYPE_ADHOC: 252 sdata->vif.bss_conf.enable_beacon = 253 !!sdata->u.ibss.presp; 254 break; 255 #ifdef CONFIG_MAC80211_MESH 256 case NL80211_IFTYPE_MESH_POINT: 257 sdata->vif.bss_conf.enable_beacon = 258 !!sdata->u.mesh.mesh_id_len; 259 break; 260 #endif 261 default: 262 /* not reached */ 263 WARN_ON(1); 264 break; 265 } 266 } 267 } 268 269 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 270 } 271 272 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 273 { 274 sdata->vif.bss_conf.use_cts_prot = false; 275 sdata->vif.bss_conf.use_short_preamble = false; 276 sdata->vif.bss_conf.use_short_slot = false; 277 return BSS_CHANGED_ERP_CTS_PROT | 278 BSS_CHANGED_ERP_PREAMBLE | 279 BSS_CHANGED_ERP_SLOT; 280 } 281 282 static void ieee80211_tasklet_handler(unsigned long data) 283 { 284 struct ieee80211_local *local = (struct ieee80211_local *) data; 285 struct sta_info *sta, *tmp; 286 struct skb_eosp_msg_data *eosp_data; 287 struct sk_buff *skb; 288 289 while ((skb = skb_dequeue(&local->skb_queue)) || 290 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 291 switch (skb->pkt_type) { 292 case IEEE80211_RX_MSG: 293 /* Clear skb->pkt_type in order to not confuse kernel 294 * netstack. */ 295 skb->pkt_type = 0; 296 ieee80211_rx(local_to_hw(local), skb); 297 break; 298 case IEEE80211_TX_STATUS_MSG: 299 skb->pkt_type = 0; 300 ieee80211_tx_status(local_to_hw(local), skb); 301 break; 302 case IEEE80211_EOSP_MSG: 303 eosp_data = (void *)skb->cb; 304 for_each_sta_info(local, eosp_data->sta, sta, tmp) { 305 /* skip wrong virtual interface */ 306 if (memcmp(eosp_data->iface, 307 sta->sdata->vif.addr, ETH_ALEN)) 308 continue; 309 clear_sta_flag(sta, WLAN_STA_SP); 310 break; 311 } 312 dev_kfree_skb(skb); 313 break; 314 default: 315 WARN(1, "mac80211: Packet is of unknown type %d\n", 316 skb->pkt_type); 317 dev_kfree_skb(skb); 318 break; 319 } 320 } 321 } 322 323 static void ieee80211_restart_work(struct work_struct *work) 324 { 325 struct ieee80211_local *local = 326 container_of(work, struct ieee80211_local, restart_work); 327 328 /* wait for scan work complete */ 329 flush_workqueue(local->workqueue); 330 331 mutex_lock(&local->mtx); 332 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 333 local->sched_scanning, 334 "%s called with hardware scan in progress\n", __func__); 335 mutex_unlock(&local->mtx); 336 337 rtnl_lock(); 338 ieee80211_scan_cancel(local); 339 ieee80211_reconfig(local); 340 rtnl_unlock(); 341 } 342 343 void ieee80211_restart_hw(struct ieee80211_hw *hw) 344 { 345 struct ieee80211_local *local = hw_to_local(hw); 346 347 trace_api_restart_hw(local); 348 349 wiphy_info(hw->wiphy, 350 "Hardware restart was requested\n"); 351 352 /* use this reason, ieee80211_reconfig will unblock it */ 353 ieee80211_stop_queues_by_reason(hw, 354 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 355 356 schedule_work(&local->restart_work); 357 } 358 EXPORT_SYMBOL(ieee80211_restart_hw); 359 360 static void ieee80211_recalc_smps_work(struct work_struct *work) 361 { 362 struct ieee80211_local *local = 363 container_of(work, struct ieee80211_local, recalc_smps); 364 365 mutex_lock(&local->iflist_mtx); 366 ieee80211_recalc_smps(local); 367 mutex_unlock(&local->iflist_mtx); 368 } 369 370 #ifdef CONFIG_INET 371 static int ieee80211_ifa_changed(struct notifier_block *nb, 372 unsigned long data, void *arg) 373 { 374 struct in_ifaddr *ifa = arg; 375 struct ieee80211_local *local = 376 container_of(nb, struct ieee80211_local, 377 ifa_notifier); 378 struct net_device *ndev = ifa->ifa_dev->dev; 379 struct wireless_dev *wdev = ndev->ieee80211_ptr; 380 struct in_device *idev; 381 struct ieee80211_sub_if_data *sdata; 382 struct ieee80211_bss_conf *bss_conf; 383 struct ieee80211_if_managed *ifmgd; 384 int c = 0; 385 386 /* Make sure it's our interface that got changed */ 387 if (!wdev) 388 return NOTIFY_DONE; 389 390 if (wdev->wiphy != local->hw.wiphy) 391 return NOTIFY_DONE; 392 393 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 394 bss_conf = &sdata->vif.bss_conf; 395 396 /* ARP filtering is only supported in managed mode */ 397 if (sdata->vif.type != NL80211_IFTYPE_STATION) 398 return NOTIFY_DONE; 399 400 idev = __in_dev_get_rtnl(sdata->dev); 401 if (!idev) 402 return NOTIFY_DONE; 403 404 ifmgd = &sdata->u.mgd; 405 mutex_lock(&ifmgd->mtx); 406 407 /* Copy the addresses to the bss_conf list */ 408 ifa = idev->ifa_list; 409 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 410 bss_conf->arp_addr_list[c] = ifa->ifa_address; 411 ifa = ifa->ifa_next; 412 c++; 413 } 414 415 /* If not all addresses fit the list, disable filtering */ 416 if (ifa) { 417 sdata->arp_filter_state = false; 418 c = 0; 419 } else { 420 sdata->arp_filter_state = true; 421 } 422 bss_conf->arp_addr_cnt = c; 423 424 /* Configure driver only if associated (which also implies it is up) */ 425 if (ifmgd->associated) { 426 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 427 ieee80211_bss_info_change_notify(sdata, 428 BSS_CHANGED_ARP_FILTER); 429 } 430 431 mutex_unlock(&ifmgd->mtx); 432 433 return NOTIFY_DONE; 434 } 435 #endif 436 437 static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 438 { 439 struct ieee80211_local *local = 440 container_of(napi, struct ieee80211_local, napi); 441 442 return local->ops->napi_poll(&local->hw, budget); 443 } 444 445 void ieee80211_napi_schedule(struct ieee80211_hw *hw) 446 { 447 struct ieee80211_local *local = hw_to_local(hw); 448 449 napi_schedule(&local->napi); 450 } 451 EXPORT_SYMBOL(ieee80211_napi_schedule); 452 453 void ieee80211_napi_complete(struct ieee80211_hw *hw) 454 { 455 struct ieee80211_local *local = hw_to_local(hw); 456 457 napi_complete(&local->napi); 458 } 459 EXPORT_SYMBOL(ieee80211_napi_complete); 460 461 /* There isn't a lot of sense in it, but you can transmit anything you like */ 462 static const struct ieee80211_txrx_stypes 463 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 464 [NL80211_IFTYPE_ADHOC] = { 465 .tx = 0xffff, 466 .rx = BIT(IEEE80211_STYPE_ACTION >> 4), 467 }, 468 [NL80211_IFTYPE_STATION] = { 469 .tx = 0xffff, 470 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 471 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 472 }, 473 [NL80211_IFTYPE_AP] = { 474 .tx = 0xffff, 475 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 476 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 477 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 478 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 479 BIT(IEEE80211_STYPE_AUTH >> 4) | 480 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 481 BIT(IEEE80211_STYPE_ACTION >> 4), 482 }, 483 [NL80211_IFTYPE_AP_VLAN] = { 484 /* copy AP */ 485 .tx = 0xffff, 486 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 487 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 488 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 489 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 490 BIT(IEEE80211_STYPE_AUTH >> 4) | 491 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 492 BIT(IEEE80211_STYPE_ACTION >> 4), 493 }, 494 [NL80211_IFTYPE_P2P_CLIENT] = { 495 .tx = 0xffff, 496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 497 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 498 }, 499 [NL80211_IFTYPE_P2P_GO] = { 500 .tx = 0xffff, 501 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 502 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 503 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 504 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 505 BIT(IEEE80211_STYPE_AUTH >> 4) | 506 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 507 BIT(IEEE80211_STYPE_ACTION >> 4), 508 }, 509 [NL80211_IFTYPE_MESH_POINT] = { 510 .tx = 0xffff, 511 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 512 BIT(IEEE80211_STYPE_AUTH >> 4) | 513 BIT(IEEE80211_STYPE_DEAUTH >> 4), 514 }, 515 }; 516 517 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 518 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 519 IEEE80211_HT_AMPDU_PARM_DENSITY, 520 521 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 522 IEEE80211_HT_CAP_MAX_AMSDU | 523 IEEE80211_HT_CAP_SGI_40), 524 .mcs = { 525 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 526 0xff, 0xff, 0xff, 0xff, 0xff, }, 527 }, 528 }; 529 530 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 531 const struct ieee80211_ops *ops) 532 { 533 struct ieee80211_local *local; 534 int priv_size, i; 535 struct wiphy *wiphy; 536 537 /* Ensure 32-byte alignment of our private data and hw private data. 538 * We use the wiphy priv data for both our ieee80211_local and for 539 * the driver's private data 540 * 541 * In memory it'll be like this: 542 * 543 * +-------------------------+ 544 * | struct wiphy | 545 * +-------------------------+ 546 * | struct ieee80211_local | 547 * +-------------------------+ 548 * | driver's private data | 549 * +-------------------------+ 550 * 551 */ 552 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 553 554 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 555 556 if (!wiphy) 557 return NULL; 558 559 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 560 561 wiphy->privid = mac80211_wiphy_privid; 562 563 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 564 WIPHY_FLAG_4ADDR_AP | 565 WIPHY_FLAG_4ADDR_STATION | 566 WIPHY_FLAG_REPORTS_OBSS | 567 WIPHY_FLAG_OFFCHAN_TX | 568 WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 569 570 wiphy->features = NL80211_FEATURE_SK_TX_STATUS | 571 NL80211_FEATURE_HT_IBSS; 572 573 if (!ops->set_key) 574 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 575 576 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 577 578 local = wiphy_priv(wiphy); 579 580 local->hw.wiphy = wiphy; 581 582 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 583 584 BUG_ON(!ops->tx && !ops->tx_frags); 585 BUG_ON(!ops->start); 586 BUG_ON(!ops->stop); 587 BUG_ON(!ops->config); 588 BUG_ON(!ops->add_interface); 589 BUG_ON(!ops->remove_interface); 590 BUG_ON(!ops->configure_filter); 591 local->ops = ops; 592 593 /* set up some defaults */ 594 local->hw.queues = 1; 595 local->hw.max_rates = 1; 596 local->hw.max_report_rates = 0; 597 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 598 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 599 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 600 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 601 local->user_power_level = -1; 602 local->uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 603 local->uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 604 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 605 606 INIT_LIST_HEAD(&local->interfaces); 607 608 __hw_addr_init(&local->mc_list); 609 610 mutex_init(&local->iflist_mtx); 611 mutex_init(&local->mtx); 612 613 mutex_init(&local->key_mtx); 614 spin_lock_init(&local->filter_lock); 615 spin_lock_init(&local->queue_stop_reason_lock); 616 617 /* 618 * The rx_skb_queue is only accessed from tasklets, 619 * but other SKB queues are used from within IRQ 620 * context. Therefore, this one needs a different 621 * locking class so our direct, non-irq-safe use of 622 * the queue's lock doesn't throw lockdep warnings. 623 */ 624 skb_queue_head_init_class(&local->rx_skb_queue, 625 &ieee80211_rx_skb_queue_class); 626 627 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 628 629 ieee80211_work_init(local); 630 631 INIT_WORK(&local->restart_work, ieee80211_restart_work); 632 633 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 634 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 635 local->smps_mode = IEEE80211_SMPS_OFF; 636 637 INIT_WORK(&local->dynamic_ps_enable_work, 638 ieee80211_dynamic_ps_enable_work); 639 INIT_WORK(&local->dynamic_ps_disable_work, 640 ieee80211_dynamic_ps_disable_work); 641 setup_timer(&local->dynamic_ps_timer, 642 ieee80211_dynamic_ps_timer, (unsigned long) local); 643 644 INIT_WORK(&local->sched_scan_stopped_work, 645 ieee80211_sched_scan_stopped_work); 646 647 spin_lock_init(&local->ack_status_lock); 648 idr_init(&local->ack_status_frames); 649 /* preallocate at least one entry */ 650 idr_pre_get(&local->ack_status_frames, GFP_KERNEL); 651 652 sta_info_init(local); 653 654 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 655 skb_queue_head_init(&local->pending[i]); 656 atomic_set(&local->agg_queue_stop[i], 0); 657 } 658 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 659 (unsigned long)local); 660 661 tasklet_init(&local->tasklet, 662 ieee80211_tasklet_handler, 663 (unsigned long) local); 664 665 skb_queue_head_init(&local->skb_queue); 666 skb_queue_head_init(&local->skb_queue_unreliable); 667 668 /* init dummy netdev for use w/ NAPI */ 669 init_dummy_netdev(&local->napi_dev); 670 671 ieee80211_led_names(local); 672 673 ieee80211_hw_roc_setup(local); 674 675 return local_to_hw(local); 676 } 677 EXPORT_SYMBOL(ieee80211_alloc_hw); 678 679 int ieee80211_register_hw(struct ieee80211_hw *hw) 680 { 681 struct ieee80211_local *local = hw_to_local(hw); 682 int result, i; 683 enum ieee80211_band band; 684 int channels, max_bitrates; 685 bool supp_ht; 686 static const u32 cipher_suites[] = { 687 /* keep WEP first, it may be removed below */ 688 WLAN_CIPHER_SUITE_WEP40, 689 WLAN_CIPHER_SUITE_WEP104, 690 WLAN_CIPHER_SUITE_TKIP, 691 WLAN_CIPHER_SUITE_CCMP, 692 693 /* keep last -- depends on hw flags! */ 694 WLAN_CIPHER_SUITE_AES_CMAC 695 }; 696 697 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) 698 #ifdef CONFIG_PM 699 && (!local->ops->suspend || !local->ops->resume) 700 #endif 701 ) 702 return -EINVAL; 703 704 if (hw->max_report_rates == 0) 705 hw->max_report_rates = hw->max_rates; 706 707 /* 708 * generic code guarantees at least one band, 709 * set this very early because much code assumes 710 * that hw.conf.channel is assigned 711 */ 712 channels = 0; 713 max_bitrates = 0; 714 supp_ht = false; 715 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 716 struct ieee80211_supported_band *sband; 717 718 sband = local->hw.wiphy->bands[band]; 719 if (!sband) 720 continue; 721 if (!local->oper_channel) { 722 /* init channel we're on */ 723 local->hw.conf.channel = 724 local->oper_channel = &sband->channels[0]; 725 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 726 } 727 channels += sband->n_channels; 728 729 if (max_bitrates < sband->n_bitrates) 730 max_bitrates = sband->n_bitrates; 731 supp_ht = supp_ht || sband->ht_cap.ht_supported; 732 } 733 734 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 735 sizeof(void *) * channels, GFP_KERNEL); 736 if (!local->int_scan_req) 737 return -ENOMEM; 738 739 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 740 if (!local->hw.wiphy->bands[band]) 741 continue; 742 local->int_scan_req->rates[band] = (u32) -1; 743 } 744 745 /* if low-level driver supports AP, we also support VLAN */ 746 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 747 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 748 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 749 } 750 751 /* mac80211 always supports monitor */ 752 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 753 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 754 755 /* 756 * mac80211 doesn't support more than 1 channel, and also not more 757 * than one IBSS interface 758 */ 759 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 760 const struct ieee80211_iface_combination *c; 761 int j; 762 763 c = &hw->wiphy->iface_combinations[i]; 764 765 if (c->num_different_channels > 1) 766 return -EINVAL; 767 768 for (j = 0; j < c->n_limits; j++) 769 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 770 c->limits[j].max > 1) 771 return -EINVAL; 772 } 773 774 #ifndef CONFIG_MAC80211_MESH 775 /* mesh depends on Kconfig, but drivers should set it if they want */ 776 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 777 #endif 778 779 /* if the underlying driver supports mesh, mac80211 will (at least) 780 * provide routing of mesh authentication frames to userspace */ 781 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 782 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 783 784 /* mac80211 supports control port protocol changing */ 785 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 786 787 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 788 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 789 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 790 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 791 792 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 793 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 794 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 795 796 /* 797 * Calculate scan IE length -- we need this to alloc 798 * memory and to subtract from the driver limit. It 799 * includes the DS Params, (extended) supported rates, and HT 800 * information -- SSID is the driver's responsibility. 801 */ 802 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 803 3 /* DS Params */; 804 if (supp_ht) 805 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 806 807 if (!local->ops->hw_scan) { 808 /* For hw_scan, driver needs to set these up. */ 809 local->hw.wiphy->max_scan_ssids = 4; 810 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 811 } 812 813 /* 814 * If the driver supports any scan IEs, then assume the 815 * limit includes the IEs mac80211 will add, otherwise 816 * leave it at zero and let the driver sort it out; we 817 * still pass our IEs to the driver but userspace will 818 * not be allowed to in that case. 819 */ 820 if (local->hw.wiphy->max_scan_ie_len) 821 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 822 823 /* Set up cipher suites unless driver already did */ 824 if (!local->hw.wiphy->cipher_suites) { 825 local->hw.wiphy->cipher_suites = cipher_suites; 826 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 827 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 828 local->hw.wiphy->n_cipher_suites--; 829 } 830 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 831 if (local->hw.wiphy->cipher_suites == cipher_suites) { 832 local->hw.wiphy->cipher_suites += 2; 833 local->hw.wiphy->n_cipher_suites -= 2; 834 } else { 835 u32 *suites; 836 int r, w = 0; 837 838 /* Filter out WEP */ 839 840 suites = kmemdup( 841 local->hw.wiphy->cipher_suites, 842 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 843 GFP_KERNEL); 844 if (!suites) 845 return -ENOMEM; 846 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 847 u32 suite = local->hw.wiphy->cipher_suites[r]; 848 if (suite == WLAN_CIPHER_SUITE_WEP40 || 849 suite == WLAN_CIPHER_SUITE_WEP104) 850 continue; 851 suites[w++] = suite; 852 } 853 local->hw.wiphy->cipher_suites = suites; 854 local->hw.wiphy->n_cipher_suites = w; 855 local->wiphy_ciphers_allocated = true; 856 } 857 } 858 859 if (!local->ops->remain_on_channel) 860 local->hw.wiphy->max_remain_on_channel_duration = 5000; 861 862 if (local->ops->sched_scan_start) 863 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 864 865 /* mac80211 based drivers don't support internal TDLS setup */ 866 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 867 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 868 869 result = wiphy_register(local->hw.wiphy); 870 if (result < 0) 871 goto fail_wiphy_register; 872 873 /* 874 * We use the number of queues for feature tests (QoS, HT) internally 875 * so restrict them appropriately. 876 */ 877 if (hw->queues > IEEE80211_MAX_QUEUES) 878 hw->queues = IEEE80211_MAX_QUEUES; 879 880 local->workqueue = 881 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 882 if (!local->workqueue) { 883 result = -ENOMEM; 884 goto fail_workqueue; 885 } 886 887 /* 888 * The hardware needs headroom for sending the frame, 889 * and we need some headroom for passing the frame to monitor 890 * interfaces, but never both at the same time. 891 */ 892 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 893 IEEE80211_TX_STATUS_HEADROOM); 894 895 debugfs_hw_add(local); 896 897 /* 898 * if the driver doesn't specify a max listen interval we 899 * use 5 which should be a safe default 900 */ 901 if (local->hw.max_listen_interval == 0) 902 local->hw.max_listen_interval = 5; 903 904 local->hw.conf.listen_interval = local->hw.max_listen_interval; 905 906 local->dynamic_ps_forced_timeout = -1; 907 908 result = ieee80211_wep_init(local); 909 if (result < 0) 910 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 911 result); 912 913 ieee80211_led_init(local); 914 915 rtnl_lock(); 916 917 result = ieee80211_init_rate_ctrl_alg(local, 918 hw->rate_control_algorithm); 919 if (result < 0) { 920 wiphy_debug(local->hw.wiphy, 921 "Failed to initialize rate control algorithm\n"); 922 goto fail_rate; 923 } 924 925 /* add one default STA interface if supported */ 926 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 927 result = ieee80211_if_add(local, "wlan%d", NULL, 928 NL80211_IFTYPE_STATION, NULL); 929 if (result) 930 wiphy_warn(local->hw.wiphy, 931 "Failed to add default virtual iface\n"); 932 } 933 934 rtnl_unlock(); 935 936 local->network_latency_notifier.notifier_call = 937 ieee80211_max_network_latency; 938 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 939 &local->network_latency_notifier); 940 if (result) { 941 rtnl_lock(); 942 goto fail_pm_qos; 943 } 944 945 #ifdef CONFIG_INET 946 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 947 result = register_inetaddr_notifier(&local->ifa_notifier); 948 if (result) 949 goto fail_ifa; 950 #endif 951 952 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 953 local->hw.napi_weight); 954 955 return 0; 956 957 #ifdef CONFIG_INET 958 fail_ifa: 959 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 960 &local->network_latency_notifier); 961 rtnl_lock(); 962 #endif 963 fail_pm_qos: 964 ieee80211_led_exit(local); 965 ieee80211_remove_interfaces(local); 966 fail_rate: 967 rtnl_unlock(); 968 ieee80211_wep_free(local); 969 sta_info_stop(local); 970 destroy_workqueue(local->workqueue); 971 fail_workqueue: 972 wiphy_unregister(local->hw.wiphy); 973 fail_wiphy_register: 974 if (local->wiphy_ciphers_allocated) 975 kfree(local->hw.wiphy->cipher_suites); 976 kfree(local->int_scan_req); 977 return result; 978 } 979 EXPORT_SYMBOL(ieee80211_register_hw); 980 981 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 982 { 983 struct ieee80211_local *local = hw_to_local(hw); 984 985 tasklet_kill(&local->tx_pending_tasklet); 986 tasklet_kill(&local->tasklet); 987 988 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 989 &local->network_latency_notifier); 990 #ifdef CONFIG_INET 991 unregister_inetaddr_notifier(&local->ifa_notifier); 992 #endif 993 994 rtnl_lock(); 995 996 /* 997 * At this point, interface list manipulations are fine 998 * because the driver cannot be handing us frames any 999 * more and the tasklet is killed. 1000 */ 1001 ieee80211_remove_interfaces(local); 1002 1003 rtnl_unlock(); 1004 1005 /* 1006 * Now all work items will be gone, but the 1007 * timer might still be armed, so delete it 1008 */ 1009 del_timer_sync(&local->work_timer); 1010 1011 cancel_work_sync(&local->restart_work); 1012 cancel_work_sync(&local->reconfig_filter); 1013 1014 ieee80211_clear_tx_pending(local); 1015 rate_control_deinitialize(local); 1016 1017 if (skb_queue_len(&local->skb_queue) || 1018 skb_queue_len(&local->skb_queue_unreliable)) 1019 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1020 skb_queue_purge(&local->skb_queue); 1021 skb_queue_purge(&local->skb_queue_unreliable); 1022 skb_queue_purge(&local->rx_skb_queue); 1023 1024 destroy_workqueue(local->workqueue); 1025 wiphy_unregister(local->hw.wiphy); 1026 sta_info_stop(local); 1027 ieee80211_wep_free(local); 1028 ieee80211_led_exit(local); 1029 kfree(local->int_scan_req); 1030 } 1031 EXPORT_SYMBOL(ieee80211_unregister_hw); 1032 1033 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1034 { 1035 WARN_ONCE(1, "Have pending ack frames!\n"); 1036 kfree_skb(p); 1037 return 0; 1038 } 1039 1040 void ieee80211_free_hw(struct ieee80211_hw *hw) 1041 { 1042 struct ieee80211_local *local = hw_to_local(hw); 1043 1044 mutex_destroy(&local->iflist_mtx); 1045 mutex_destroy(&local->mtx); 1046 1047 if (local->wiphy_ciphers_allocated) 1048 kfree(local->hw.wiphy->cipher_suites); 1049 1050 idr_for_each(&local->ack_status_frames, 1051 ieee80211_free_ack_frame, NULL); 1052 idr_destroy(&local->ack_status_frames); 1053 1054 wiphy_free(local->hw.wiphy); 1055 } 1056 EXPORT_SYMBOL(ieee80211_free_hw); 1057 1058 static int __init ieee80211_init(void) 1059 { 1060 struct sk_buff *skb; 1061 int ret; 1062 1063 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1064 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1065 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1066 1067 ret = rc80211_minstrel_init(); 1068 if (ret) 1069 return ret; 1070 1071 ret = rc80211_minstrel_ht_init(); 1072 if (ret) 1073 goto err_minstrel; 1074 1075 ret = rc80211_pid_init(); 1076 if (ret) 1077 goto err_pid; 1078 1079 ret = ieee80211_iface_init(); 1080 if (ret) 1081 goto err_netdev; 1082 1083 return 0; 1084 err_netdev: 1085 rc80211_pid_exit(); 1086 err_pid: 1087 rc80211_minstrel_ht_exit(); 1088 err_minstrel: 1089 rc80211_minstrel_exit(); 1090 1091 return ret; 1092 } 1093 1094 static void __exit ieee80211_exit(void) 1095 { 1096 rc80211_pid_exit(); 1097 rc80211_minstrel_ht_exit(); 1098 rc80211_minstrel_exit(); 1099 1100 if (mesh_allocated) 1101 ieee80211s_stop(); 1102 1103 ieee80211_iface_exit(); 1104 1105 rcu_barrier(); 1106 } 1107 1108 1109 subsys_initcall(ieee80211_init); 1110 module_exit(ieee80211_exit); 1111 1112 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1113 MODULE_LICENSE("GPL"); 1114