main.c revision b292219fa5061e2657ecf518b48426913d0ddae6
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 36static struct lock_class_key ieee80211_rx_skb_queue_class; 37 38void 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 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 52 new_flags |= FIF_BCN_PRBRESP_PROMISC; 53 54 if (local->fif_probe_req || local->probe_req_reg) 55 new_flags |= FIF_PROBE_REQ; 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 96static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 97{ 98 struct ieee80211_channel *chan; 99 u32 changed = 0; 100 int power; 101 enum nl80211_channel_type channel_type; 102 u32 offchannel_flag; 103 104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 105 if (local->scan_channel) { 106 chan = local->scan_channel; 107 /* If scanning on oper channel, use whatever channel-type 108 * is currently in use. 109 */ 110 if (chan == local->_oper_channel) 111 channel_type = local->_oper_channel_type; 112 else 113 channel_type = NL80211_CHAN_NO_HT; 114 } else if (local->tmp_channel) { 115 chan = local->tmp_channel; 116 channel_type = local->tmp_channel_type; 117 } else { 118 chan = local->_oper_channel; 119 channel_type = local->_oper_channel_type; 120 } 121 122 if (chan != local->_oper_channel || 123 channel_type != local->_oper_channel_type) 124 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 125 else 126 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 127 128 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 129 130 if (offchannel_flag || chan != local->hw.conf.channel || 131 channel_type != local->hw.conf.channel_type) { 132 local->hw.conf.channel = chan; 133 local->hw.conf.channel_type = channel_type; 134 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 135 } 136 137 if (!conf_is_ht(&local->hw.conf)) { 138 /* 139 * mac80211.h documents that this is only valid 140 * when the channel is set to an HT type, and 141 * that otherwise STATIC is used. 142 */ 143 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 144 } else if (local->hw.conf.smps_mode != local->smps_mode) { 145 local->hw.conf.smps_mode = local->smps_mode; 146 changed |= IEEE80211_CONF_CHANGE_SMPS; 147 } 148 149 if (test_bit(SCAN_SW_SCANNING, &local->scanning) || 150 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) || 151 test_bit(SCAN_HW_SCANNING, &local->scanning) || 152 !local->ap_power_level) 153 power = chan->max_power; 154 else 155 power = min(chan->max_power, local->ap_power_level); 156 157 if (local->user_power_level >= 0) 158 power = min(power, local->user_power_level); 159 160 if (local->hw.conf.power_level != power) { 161 changed |= IEEE80211_CONF_CHANGE_POWER; 162 local->hw.conf.power_level = power; 163 } 164 165 return changed; 166} 167 168int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 169{ 170 int ret = 0; 171 172 might_sleep(); 173 174 if (!local->use_chanctx) 175 changed |= ieee80211_hw_conf_chan(local); 176 else 177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 178 IEEE80211_CONF_CHANGE_POWER); 179 180 if (changed && local->open_count) { 181 ret = drv_config(local, changed); 182 /* 183 * Goal: 184 * HW reconfiguration should never fail, the driver has told 185 * us what it can support so it should live up to that promise. 186 * 187 * Current status: 188 * rfkill is not integrated with mac80211 and a 189 * configuration command can thus fail if hardware rfkill 190 * is enabled 191 * 192 * FIXME: integrate rfkill with mac80211 and then add this 193 * WARN_ON() back 194 * 195 */ 196 /* WARN_ON(ret); */ 197 } 198 199 return ret; 200} 201 202void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 203 u32 changed) 204{ 205 struct ieee80211_local *local = sdata->local; 206 static const u8 zero[ETH_ALEN] = { 0 }; 207 208 if (!changed) 209 return; 210 211 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 212 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 213 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 214 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 215 else if (sdata->vif.type == NL80211_IFTYPE_AP) 216 sdata->vif.bss_conf.bssid = sdata->vif.addr; 217 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 218 sdata->vif.bss_conf.bssid = NULL; 219 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 220 sdata->vif.bss_conf.bssid = zero; 221 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { 222 sdata->vif.bss_conf.bssid = sdata->vif.addr; 223 WARN_ONCE(changed & ~(BSS_CHANGED_IDLE), 224 "P2P Device BSS changed %#x", changed); 225 } else { 226 WARN_ON(1); 227 return; 228 } 229 230 switch (sdata->vif.type) { 231 case NL80211_IFTYPE_AP: 232 case NL80211_IFTYPE_ADHOC: 233 case NL80211_IFTYPE_WDS: 234 case NL80211_IFTYPE_MESH_POINT: 235 break; 236 default: 237 /* do not warn to simplify caller in scan.c */ 238 changed &= ~BSS_CHANGED_BEACON_ENABLED; 239 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 240 return; 241 break; 242 } 243 244 if (changed & BSS_CHANGED_BEACON_ENABLED) { 245 if (local->quiescing || !ieee80211_sdata_running(sdata) || 246 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) { 247 sdata->vif.bss_conf.enable_beacon = false; 248 } else { 249 /* 250 * Beacon should be enabled, but AP mode must 251 * check whether there is a beacon configured. 252 */ 253 switch (sdata->vif.type) { 254 case NL80211_IFTYPE_AP: 255 sdata->vif.bss_conf.enable_beacon = 256 !!sdata->u.ap.beacon; 257 break; 258 case NL80211_IFTYPE_ADHOC: 259 sdata->vif.bss_conf.enable_beacon = 260 !!sdata->u.ibss.presp; 261 break; 262#ifdef CONFIG_MAC80211_MESH 263 case NL80211_IFTYPE_MESH_POINT: 264 sdata->vif.bss_conf.enable_beacon = 265 !!sdata->u.mesh.mesh_id_len; 266 break; 267#endif 268 default: 269 /* not reached */ 270 WARN_ON(1); 271 break; 272 } 273 } 274 } 275 276 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 277} 278 279u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 280{ 281 sdata->vif.bss_conf.use_cts_prot = false; 282 sdata->vif.bss_conf.use_short_preamble = false; 283 sdata->vif.bss_conf.use_short_slot = false; 284 return BSS_CHANGED_ERP_CTS_PROT | 285 BSS_CHANGED_ERP_PREAMBLE | 286 BSS_CHANGED_ERP_SLOT; 287} 288 289static void ieee80211_tasklet_handler(unsigned long data) 290{ 291 struct ieee80211_local *local = (struct ieee80211_local *) data; 292 struct sta_info *sta, *tmp; 293 struct skb_eosp_msg_data *eosp_data; 294 struct sk_buff *skb; 295 296 while ((skb = skb_dequeue(&local->skb_queue)) || 297 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 298 switch (skb->pkt_type) { 299 case IEEE80211_RX_MSG: 300 /* Clear skb->pkt_type in order to not confuse kernel 301 * netstack. */ 302 skb->pkt_type = 0; 303 ieee80211_rx(&local->hw, skb); 304 break; 305 case IEEE80211_TX_STATUS_MSG: 306 skb->pkt_type = 0; 307 ieee80211_tx_status(&local->hw, skb); 308 break; 309 case IEEE80211_EOSP_MSG: 310 eosp_data = (void *)skb->cb; 311 for_each_sta_info(local, eosp_data->sta, sta, tmp) { 312 /* skip wrong virtual interface */ 313 if (memcmp(eosp_data->iface, 314 sta->sdata->vif.addr, ETH_ALEN)) 315 continue; 316 clear_sta_flag(sta, WLAN_STA_SP); 317 break; 318 } 319 dev_kfree_skb(skb); 320 break; 321 default: 322 WARN(1, "mac80211: Packet is of unknown type %d\n", 323 skb->pkt_type); 324 dev_kfree_skb(skb); 325 break; 326 } 327 } 328} 329 330static void ieee80211_restart_work(struct work_struct *work) 331{ 332 struct ieee80211_local *local = 333 container_of(work, struct ieee80211_local, restart_work); 334 335 /* wait for scan work complete */ 336 flush_workqueue(local->workqueue); 337 338 mutex_lock(&local->mtx); 339 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 340 rcu_dereference_protected(local->sched_scan_sdata, 341 lockdep_is_held(&local->mtx)), 342 "%s called with hardware scan in progress\n", __func__); 343 mutex_unlock(&local->mtx); 344 345 rtnl_lock(); 346 ieee80211_scan_cancel(local); 347 ieee80211_reconfig(local); 348 rtnl_unlock(); 349} 350 351void ieee80211_restart_hw(struct ieee80211_hw *hw) 352{ 353 struct ieee80211_local *local = hw_to_local(hw); 354 355 trace_api_restart_hw(local); 356 357 wiphy_info(hw->wiphy, 358 "Hardware restart was requested\n"); 359 360 /* use this reason, ieee80211_reconfig will unblock it */ 361 ieee80211_stop_queues_by_reason(hw, 362 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 363 364 /* 365 * Stop all Rx during the reconfig. We don't want state changes 366 * or driver callbacks while this is in progress. 367 */ 368 local->in_reconfig = true; 369 barrier(); 370 371 schedule_work(&local->restart_work); 372} 373EXPORT_SYMBOL(ieee80211_restart_hw); 374 375#ifdef CONFIG_INET 376static int ieee80211_ifa_changed(struct notifier_block *nb, 377 unsigned long data, void *arg) 378{ 379 struct in_ifaddr *ifa = arg; 380 struct ieee80211_local *local = 381 container_of(nb, struct ieee80211_local, 382 ifa_notifier); 383 struct net_device *ndev = ifa->ifa_dev->dev; 384 struct wireless_dev *wdev = ndev->ieee80211_ptr; 385 struct in_device *idev; 386 struct ieee80211_sub_if_data *sdata; 387 struct ieee80211_bss_conf *bss_conf; 388 struct ieee80211_if_managed *ifmgd; 389 int c = 0; 390 391 /* Make sure it's our interface that got changed */ 392 if (!wdev) 393 return NOTIFY_DONE; 394 395 if (wdev->wiphy != local->hw.wiphy) 396 return NOTIFY_DONE; 397 398 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 399 bss_conf = &sdata->vif.bss_conf; 400 401 /* ARP filtering is only supported in managed mode */ 402 if (sdata->vif.type != NL80211_IFTYPE_STATION) 403 return NOTIFY_DONE; 404 405 idev = __in_dev_get_rtnl(sdata->dev); 406 if (!idev) 407 return NOTIFY_DONE; 408 409 ifmgd = &sdata->u.mgd; 410 mutex_lock(&ifmgd->mtx); 411 412 /* Copy the addresses to the bss_conf list */ 413 ifa = idev->ifa_list; 414 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 415 bss_conf->arp_addr_list[c] = ifa->ifa_address; 416 ifa = ifa->ifa_next; 417 c++; 418 } 419 420 /* If not all addresses fit the list, disable filtering */ 421 if (ifa) { 422 sdata->arp_filter_state = false; 423 c = 0; 424 } else { 425 sdata->arp_filter_state = true; 426 } 427 bss_conf->arp_addr_cnt = c; 428 429 /* Configure driver only if associated (which also implies it is up) */ 430 if (ifmgd->associated) { 431 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 432 ieee80211_bss_info_change_notify(sdata, 433 BSS_CHANGED_ARP_FILTER); 434 } 435 436 mutex_unlock(&ifmgd->mtx); 437 438 return NOTIFY_DONE; 439} 440#endif 441 442static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 443{ 444 struct ieee80211_local *local = 445 container_of(napi, struct ieee80211_local, napi); 446 447 return local->ops->napi_poll(&local->hw, budget); 448} 449 450void ieee80211_napi_schedule(struct ieee80211_hw *hw) 451{ 452 struct ieee80211_local *local = hw_to_local(hw); 453 454 napi_schedule(&local->napi); 455} 456EXPORT_SYMBOL(ieee80211_napi_schedule); 457 458void ieee80211_napi_complete(struct ieee80211_hw *hw) 459{ 460 struct ieee80211_local *local = hw_to_local(hw); 461 462 napi_complete(&local->napi); 463} 464EXPORT_SYMBOL(ieee80211_napi_complete); 465 466/* There isn't a lot of sense in it, but you can transmit anything you like */ 467static const struct ieee80211_txrx_stypes 468ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 469 [NL80211_IFTYPE_ADHOC] = { 470 .tx = 0xffff, 471 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 472 BIT(IEEE80211_STYPE_AUTH >> 4) | 473 BIT(IEEE80211_STYPE_DEAUTH >> 4), 474 }, 475 [NL80211_IFTYPE_STATION] = { 476 .tx = 0xffff, 477 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 478 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 479 }, 480 [NL80211_IFTYPE_AP] = { 481 .tx = 0xffff, 482 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 483 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 484 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 485 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 486 BIT(IEEE80211_STYPE_AUTH >> 4) | 487 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 488 BIT(IEEE80211_STYPE_ACTION >> 4), 489 }, 490 [NL80211_IFTYPE_AP_VLAN] = { 491 /* copy AP */ 492 .tx = 0xffff, 493 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 494 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 495 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 496 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 497 BIT(IEEE80211_STYPE_AUTH >> 4) | 498 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 499 BIT(IEEE80211_STYPE_ACTION >> 4), 500 }, 501 [NL80211_IFTYPE_P2P_CLIENT] = { 502 .tx = 0xffff, 503 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 504 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 505 }, 506 [NL80211_IFTYPE_P2P_GO] = { 507 .tx = 0xffff, 508 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 509 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 510 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 511 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 512 BIT(IEEE80211_STYPE_AUTH >> 4) | 513 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 514 BIT(IEEE80211_STYPE_ACTION >> 4), 515 }, 516 [NL80211_IFTYPE_MESH_POINT] = { 517 .tx = 0xffff, 518 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 519 BIT(IEEE80211_STYPE_AUTH >> 4) | 520 BIT(IEEE80211_STYPE_DEAUTH >> 4), 521 }, 522 [NL80211_IFTYPE_P2P_DEVICE] = { 523 .tx = 0xffff, 524 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 525 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 526 }, 527}; 528 529static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 530 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 531 IEEE80211_HT_AMPDU_PARM_DENSITY, 532 533 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 534 IEEE80211_HT_CAP_MAX_AMSDU | 535 IEEE80211_HT_CAP_SGI_40), 536 .mcs = { 537 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 538 0xff, 0xff, 0xff, 0xff, 0xff, }, 539 }, 540}; 541 542struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 543 const struct ieee80211_ops *ops) 544{ 545 struct ieee80211_local *local; 546 int priv_size, i; 547 struct wiphy *wiphy; 548 bool use_chanctx; 549 550 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 551 !ops->add_interface || !ops->remove_interface || 552 !ops->configure_filter)) 553 return NULL; 554 555 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 556 return NULL; 557 558 /* check all or no channel context operations exist */ 559 i = !!ops->add_chanctx + !!ops->remove_chanctx + 560 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 561 !!ops->unassign_vif_chanctx; 562 if (WARN_ON(i != 0 && i != 5)) 563 return NULL; 564 use_chanctx = i == 5; 565 566 /* Ensure 32-byte alignment of our private data and hw private data. 567 * We use the wiphy priv data for both our ieee80211_local and for 568 * the driver's private data 569 * 570 * In memory it'll be like this: 571 * 572 * +-------------------------+ 573 * | struct wiphy | 574 * +-------------------------+ 575 * | struct ieee80211_local | 576 * +-------------------------+ 577 * | driver's private data | 578 * +-------------------------+ 579 * 580 */ 581 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 582 583 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 584 585 if (!wiphy) 586 return NULL; 587 588 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 589 590 wiphy->privid = mac80211_wiphy_privid; 591 592 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 593 WIPHY_FLAG_4ADDR_AP | 594 WIPHY_FLAG_4ADDR_STATION | 595 WIPHY_FLAG_REPORTS_OBSS | 596 WIPHY_FLAG_OFFCHAN_TX; 597 598 if (ops->remain_on_channel) 599 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 600 601 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 602 NL80211_FEATURE_SAE | 603 NL80211_FEATURE_HT_IBSS; 604 605 if (!ops->set_key) 606 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 607 608 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 609 610 local = wiphy_priv(wiphy); 611 612 local->hw.wiphy = wiphy; 613 614 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 615 616 local->ops = ops; 617 local->use_chanctx = use_chanctx; 618 619 /* set up some defaults */ 620 local->hw.queues = 1; 621 local->hw.max_rates = 1; 622 local->hw.max_report_rates = 0; 623 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 624 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 625 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 626 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 627 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 628 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 629 IEEE80211_RADIOTAP_MCS_HAVE_GI | 630 IEEE80211_RADIOTAP_MCS_HAVE_BW; 631 local->user_power_level = -1; 632 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 633 634 INIT_LIST_HEAD(&local->interfaces); 635 636 __hw_addr_init(&local->mc_list); 637 638 mutex_init(&local->iflist_mtx); 639 mutex_init(&local->mtx); 640 641 mutex_init(&local->key_mtx); 642 spin_lock_init(&local->filter_lock); 643 spin_lock_init(&local->queue_stop_reason_lock); 644 645 INIT_LIST_HEAD(&local->chanctx_list); 646 mutex_init(&local->chanctx_mtx); 647 648 /* 649 * The rx_skb_queue is only accessed from tasklets, 650 * but other SKB queues are used from within IRQ 651 * context. Therefore, this one needs a different 652 * locking class so our direct, non-irq-safe use of 653 * the queue's lock doesn't throw lockdep warnings. 654 */ 655 skb_queue_head_init_class(&local->rx_skb_queue, 656 &ieee80211_rx_skb_queue_class); 657 658 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 659 660 INIT_WORK(&local->restart_work, ieee80211_restart_work); 661 662 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 663 local->smps_mode = IEEE80211_SMPS_OFF; 664 665 INIT_WORK(&local->dynamic_ps_enable_work, 666 ieee80211_dynamic_ps_enable_work); 667 INIT_WORK(&local->dynamic_ps_disable_work, 668 ieee80211_dynamic_ps_disable_work); 669 setup_timer(&local->dynamic_ps_timer, 670 ieee80211_dynamic_ps_timer, (unsigned long) local); 671 672 INIT_WORK(&local->sched_scan_stopped_work, 673 ieee80211_sched_scan_stopped_work); 674 675 spin_lock_init(&local->ack_status_lock); 676 idr_init(&local->ack_status_frames); 677 /* preallocate at least one entry */ 678 idr_pre_get(&local->ack_status_frames, GFP_KERNEL); 679 680 sta_info_init(local); 681 682 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 683 skb_queue_head_init(&local->pending[i]); 684 atomic_set(&local->agg_queue_stop[i], 0); 685 } 686 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 687 (unsigned long)local); 688 689 tasklet_init(&local->tasklet, 690 ieee80211_tasklet_handler, 691 (unsigned long) local); 692 693 skb_queue_head_init(&local->skb_queue); 694 skb_queue_head_init(&local->skb_queue_unreliable); 695 696 /* init dummy netdev for use w/ NAPI */ 697 init_dummy_netdev(&local->napi_dev); 698 699 ieee80211_led_names(local); 700 701 ieee80211_roc_setup(local); 702 703 return &local->hw; 704} 705EXPORT_SYMBOL(ieee80211_alloc_hw); 706 707int ieee80211_register_hw(struct ieee80211_hw *hw) 708{ 709 struct ieee80211_local *local = hw_to_local(hw); 710 int result, i; 711 enum ieee80211_band band; 712 int channels, max_bitrates; 713 bool supp_ht, supp_vht; 714 netdev_features_t feature_whitelist; 715 static const u32 cipher_suites[] = { 716 /* keep WEP first, it may be removed below */ 717 WLAN_CIPHER_SUITE_WEP40, 718 WLAN_CIPHER_SUITE_WEP104, 719 WLAN_CIPHER_SUITE_TKIP, 720 WLAN_CIPHER_SUITE_CCMP, 721 722 /* keep last -- depends on hw flags! */ 723 WLAN_CIPHER_SUITE_AES_CMAC 724 }; 725 726 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 727 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 728 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 729 return -EINVAL; 730 731#ifdef CONFIG_PM 732 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 733 (!local->ops->suspend || !local->ops->resume)) 734 return -EINVAL; 735#endif 736 737 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan) 738 return -EINVAL; 739 740 if (!local->use_chanctx) { 741 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 742 const struct ieee80211_iface_combination *comb; 743 744 comb = &local->hw.wiphy->iface_combinations[i]; 745 746 if (comb->num_different_channels > 1) 747 return -EINVAL; 748 } 749 750 /* 751 * WDS is currently prohibited when channel contexts are used 752 * because there's no clear definition of which channel WDS 753 * type interfaces use 754 */ 755 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 756 return -EINVAL; 757 } 758 759 /* Only HW csum features are currently compatible with mac80211 */ 760 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 761 NETIF_F_HW_CSUM; 762 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 763 return -EINVAL; 764 765 if (hw->max_report_rates == 0) 766 hw->max_report_rates = hw->max_rates; 767 768 local->rx_chains = 1; 769 770 /* 771 * generic code guarantees at least one band, 772 * set this very early because much code assumes 773 * that hw.conf.channel is assigned 774 */ 775 channels = 0; 776 max_bitrates = 0; 777 supp_ht = false; 778 supp_vht = false; 779 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 780 struct ieee80211_supported_band *sband; 781 782 sband = local->hw.wiphy->bands[band]; 783 if (!sband) 784 continue; 785 if (!local->use_chanctx && !local->_oper_channel) { 786 /* init channel we're on */ 787 local->hw.conf.channel = 788 local->_oper_channel = &sband->channels[0]; 789 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 790 } 791 if (!local->monitor_channel) { 792 local->monitor_channel = &sband->channels[0]; 793 local->monitor_channel_type = NL80211_CHAN_NO_HT; 794 } 795 channels += sband->n_channels; 796 797 if (max_bitrates < sband->n_bitrates) 798 max_bitrates = sband->n_bitrates; 799 supp_ht = supp_ht || sband->ht_cap.ht_supported; 800 supp_vht = supp_vht || sband->vht_cap.vht_supported; 801 802 if (sband->ht_cap.ht_supported) 803 local->rx_chains = 804 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 805 local->rx_chains); 806 807 /* TODO: consider VHT for RX chains, hopefully it's the same */ 808 } 809 810 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 811 sizeof(void *) * channels, GFP_KERNEL); 812 if (!local->int_scan_req) 813 return -ENOMEM; 814 815 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 816 if (!local->hw.wiphy->bands[band]) 817 continue; 818 local->int_scan_req->rates[band] = (u32) -1; 819 } 820 821 /* if low-level driver supports AP, we also support VLAN */ 822 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 823 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 824 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 825 } 826 827 /* mac80211 always supports monitor */ 828 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 829 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 830 831 /* mac80211 doesn't support more than one IBSS interface right now */ 832 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 833 const struct ieee80211_iface_combination *c; 834 int j; 835 836 c = &hw->wiphy->iface_combinations[i]; 837 838 for (j = 0; j < c->n_limits; j++) 839 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 840 c->limits[j].max > 1) 841 return -EINVAL; 842 } 843 844#ifndef CONFIG_MAC80211_MESH 845 /* mesh depends on Kconfig, but drivers should set it if they want */ 846 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 847#endif 848 849 /* if the underlying driver supports mesh, mac80211 will (at least) 850 * provide routing of mesh authentication frames to userspace */ 851 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 852 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 853 854 /* mac80211 supports control port protocol changing */ 855 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 856 857 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 858 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 859 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 860 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 861 862 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 863 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 864 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 865 866 /* 867 * Calculate scan IE length -- we need this to alloc 868 * memory and to subtract from the driver limit. It 869 * includes the DS Params, (extended) supported rates, and HT 870 * information -- SSID is the driver's responsibility. 871 */ 872 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 873 3 /* DS Params */; 874 if (supp_ht) 875 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 876 877 if (supp_vht) 878 local->scan_ies_len += 879 2 + sizeof(struct ieee80211_vht_cap); 880 881 if (!local->ops->hw_scan) { 882 /* For hw_scan, driver needs to set these up. */ 883 local->hw.wiphy->max_scan_ssids = 4; 884 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 885 } 886 887 /* 888 * If the driver supports any scan IEs, then assume the 889 * limit includes the IEs mac80211 will add, otherwise 890 * leave it at zero and let the driver sort it out; we 891 * still pass our IEs to the driver but userspace will 892 * not be allowed to in that case. 893 */ 894 if (local->hw.wiphy->max_scan_ie_len) 895 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 896 897 /* Set up cipher suites unless driver already did */ 898 if (!local->hw.wiphy->cipher_suites) { 899 local->hw.wiphy->cipher_suites = cipher_suites; 900 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 901 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 902 local->hw.wiphy->n_cipher_suites--; 903 } 904 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 905 if (local->hw.wiphy->cipher_suites == cipher_suites) { 906 local->hw.wiphy->cipher_suites += 2; 907 local->hw.wiphy->n_cipher_suites -= 2; 908 } else { 909 u32 *suites; 910 int r, w = 0; 911 912 /* Filter out WEP */ 913 914 suites = kmemdup( 915 local->hw.wiphy->cipher_suites, 916 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 917 GFP_KERNEL); 918 if (!suites) 919 return -ENOMEM; 920 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 921 u32 suite = local->hw.wiphy->cipher_suites[r]; 922 if (suite == WLAN_CIPHER_SUITE_WEP40 || 923 suite == WLAN_CIPHER_SUITE_WEP104) 924 continue; 925 suites[w++] = suite; 926 } 927 local->hw.wiphy->cipher_suites = suites; 928 local->hw.wiphy->n_cipher_suites = w; 929 local->wiphy_ciphers_allocated = true; 930 } 931 } 932 933 if (!local->ops->remain_on_channel) 934 local->hw.wiphy->max_remain_on_channel_duration = 5000; 935 936 if (local->ops->sched_scan_start) 937 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 938 939 /* mac80211 based drivers don't support internal TDLS setup */ 940 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 941 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 942 943 result = wiphy_register(local->hw.wiphy); 944 if (result < 0) 945 goto fail_wiphy_register; 946 947 /* 948 * We use the number of queues for feature tests (QoS, HT) internally 949 * so restrict them appropriately. 950 */ 951 if (hw->queues > IEEE80211_MAX_QUEUES) 952 hw->queues = IEEE80211_MAX_QUEUES; 953 954 local->workqueue = 955 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 956 if (!local->workqueue) { 957 result = -ENOMEM; 958 goto fail_workqueue; 959 } 960 961 /* 962 * The hardware needs headroom for sending the frame, 963 * and we need some headroom for passing the frame to monitor 964 * interfaces, but never both at the same time. 965 */ 966 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 967 IEEE80211_TX_STATUS_HEADROOM); 968 969 debugfs_hw_add(local); 970 971 /* 972 * if the driver doesn't specify a max listen interval we 973 * use 5 which should be a safe default 974 */ 975 if (local->hw.max_listen_interval == 0) 976 local->hw.max_listen_interval = 5; 977 978 local->hw.conf.listen_interval = local->hw.max_listen_interval; 979 980 local->dynamic_ps_forced_timeout = -1; 981 982 result = ieee80211_wep_init(local); 983 if (result < 0) 984 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 985 result); 986 987 ieee80211_led_init(local); 988 989 rtnl_lock(); 990 991 result = ieee80211_init_rate_ctrl_alg(local, 992 hw->rate_control_algorithm); 993 if (result < 0) { 994 wiphy_debug(local->hw.wiphy, 995 "Failed to initialize rate control algorithm\n"); 996 goto fail_rate; 997 } 998 999 /* add one default STA interface if supported */ 1000 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 1001 result = ieee80211_if_add(local, "wlan%d", NULL, 1002 NL80211_IFTYPE_STATION, NULL); 1003 if (result) 1004 wiphy_warn(local->hw.wiphy, 1005 "Failed to add default virtual iface\n"); 1006 } 1007 1008 rtnl_unlock(); 1009 1010 local->network_latency_notifier.notifier_call = 1011 ieee80211_max_network_latency; 1012 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1013 &local->network_latency_notifier); 1014 if (result) { 1015 rtnl_lock(); 1016 goto fail_pm_qos; 1017 } 1018 1019#ifdef CONFIG_INET 1020 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1021 result = register_inetaddr_notifier(&local->ifa_notifier); 1022 if (result) 1023 goto fail_ifa; 1024#endif 1025 1026 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 1027 local->hw.napi_weight); 1028 1029 return 0; 1030 1031#ifdef CONFIG_INET 1032 fail_ifa: 1033 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1034 &local->network_latency_notifier); 1035 rtnl_lock(); 1036#endif 1037 fail_pm_qos: 1038 ieee80211_led_exit(local); 1039 ieee80211_remove_interfaces(local); 1040 fail_rate: 1041 rtnl_unlock(); 1042 ieee80211_wep_free(local); 1043 sta_info_stop(local); 1044 destroy_workqueue(local->workqueue); 1045 fail_workqueue: 1046 wiphy_unregister(local->hw.wiphy); 1047 fail_wiphy_register: 1048 if (local->wiphy_ciphers_allocated) 1049 kfree(local->hw.wiphy->cipher_suites); 1050 kfree(local->int_scan_req); 1051 return result; 1052} 1053EXPORT_SYMBOL(ieee80211_register_hw); 1054 1055void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1056{ 1057 struct ieee80211_local *local = hw_to_local(hw); 1058 1059 tasklet_kill(&local->tx_pending_tasklet); 1060 tasklet_kill(&local->tasklet); 1061 1062 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1063 &local->network_latency_notifier); 1064#ifdef CONFIG_INET 1065 unregister_inetaddr_notifier(&local->ifa_notifier); 1066#endif 1067 1068 rtnl_lock(); 1069 1070 /* 1071 * At this point, interface list manipulations are fine 1072 * because the driver cannot be handing us frames any 1073 * more and the tasklet is killed. 1074 */ 1075 ieee80211_remove_interfaces(local); 1076 1077 rtnl_unlock(); 1078 1079 cancel_work_sync(&local->restart_work); 1080 cancel_work_sync(&local->reconfig_filter); 1081 1082 ieee80211_clear_tx_pending(local); 1083 rate_control_deinitialize(local); 1084 1085 if (skb_queue_len(&local->skb_queue) || 1086 skb_queue_len(&local->skb_queue_unreliable)) 1087 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1088 skb_queue_purge(&local->skb_queue); 1089 skb_queue_purge(&local->skb_queue_unreliable); 1090 skb_queue_purge(&local->rx_skb_queue); 1091 1092 destroy_workqueue(local->workqueue); 1093 wiphy_unregister(local->hw.wiphy); 1094 sta_info_stop(local); 1095 ieee80211_wep_free(local); 1096 ieee80211_led_exit(local); 1097 kfree(local->int_scan_req); 1098} 1099EXPORT_SYMBOL(ieee80211_unregister_hw); 1100 1101static int ieee80211_free_ack_frame(int id, void *p, void *data) 1102{ 1103 WARN_ONCE(1, "Have pending ack frames!\n"); 1104 kfree_skb(p); 1105 return 0; 1106} 1107 1108void ieee80211_free_hw(struct ieee80211_hw *hw) 1109{ 1110 struct ieee80211_local *local = hw_to_local(hw); 1111 1112 mutex_destroy(&local->iflist_mtx); 1113 mutex_destroy(&local->mtx); 1114 1115 if (local->wiphy_ciphers_allocated) 1116 kfree(local->hw.wiphy->cipher_suites); 1117 1118 idr_for_each(&local->ack_status_frames, 1119 ieee80211_free_ack_frame, NULL); 1120 idr_destroy(&local->ack_status_frames); 1121 1122 wiphy_free(local->hw.wiphy); 1123} 1124EXPORT_SYMBOL(ieee80211_free_hw); 1125 1126static int __init ieee80211_init(void) 1127{ 1128 struct sk_buff *skb; 1129 int ret; 1130 1131 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1132 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1133 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1134 1135 ret = rc80211_minstrel_init(); 1136 if (ret) 1137 return ret; 1138 1139 ret = rc80211_minstrel_ht_init(); 1140 if (ret) 1141 goto err_minstrel; 1142 1143 ret = rc80211_pid_init(); 1144 if (ret) 1145 goto err_pid; 1146 1147 ret = ieee80211_iface_init(); 1148 if (ret) 1149 goto err_netdev; 1150 1151 return 0; 1152 err_netdev: 1153 rc80211_pid_exit(); 1154 err_pid: 1155 rc80211_minstrel_ht_exit(); 1156 err_minstrel: 1157 rc80211_minstrel_exit(); 1158 1159 return ret; 1160} 1161 1162static void __exit ieee80211_exit(void) 1163{ 1164 rc80211_pid_exit(); 1165 rc80211_minstrel_ht_exit(); 1166 rc80211_minstrel_exit(); 1167 1168 if (mesh_allocated) 1169 ieee80211s_stop(); 1170 1171 ieee80211_iface_exit(); 1172 1173 rcu_barrier(); 1174} 1175 1176 1177subsys_initcall(ieee80211_init); 1178module_exit(ieee80211_exit); 1179 1180MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1181MODULE_LICENSE("GPL"); 1182