main.c revision 4bf88530be971bf95a7830ca61b4120980bf4347
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_sub_if_data *sdata; 99 struct ieee80211_channel *chan; 100 u32 changed = 0; 101 int power; 102 enum nl80211_channel_type channel_type; 103 u32 offchannel_flag; 104 bool scanning = false; 105 106 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 107 if (local->scan_channel) { 108 chan = local->scan_channel; 109 /* If scanning on oper channel, use whatever channel-type 110 * is currently in use. 111 */ 112 if (chan == local->_oper_channel) 113 channel_type = local->_oper_channel_type; 114 else 115 channel_type = NL80211_CHAN_NO_HT; 116 } else if (local->tmp_channel) { 117 chan = local->tmp_channel; 118 channel_type = NL80211_CHAN_NO_HT; 119 } else { 120 chan = local->_oper_channel; 121 channel_type = local->_oper_channel_type; 122 } 123 124 if (chan != local->_oper_channel || 125 channel_type != local->_oper_channel_type) 126 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 127 else 128 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 129 130 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 131 132 if (offchannel_flag || chan != local->hw.conf.channel || 133 channel_type != local->hw.conf.channel_type) { 134 local->hw.conf.channel = chan; 135 local->hw.conf.channel_type = channel_type; 136 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 137 } 138 139 if (!conf_is_ht(&local->hw.conf)) { 140 /* 141 * mac80211.h documents that this is only valid 142 * when the channel is set to an HT type, and 143 * that otherwise STATIC is used. 144 */ 145 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 146 } else if (local->hw.conf.smps_mode != local->smps_mode) { 147 local->hw.conf.smps_mode = local->smps_mode; 148 changed |= IEEE80211_CONF_CHANGE_SMPS; 149 } 150 151 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 152 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) || 153 test_bit(SCAN_HW_SCANNING, &local->scanning); 154 power = chan->max_power; 155 156 rcu_read_lock(); 157 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 158 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 159 continue; 160 power = min(power, sdata->vif.bss_conf.txpower); 161 } 162 rcu_read_unlock(); 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 return changed; 170} 171 172int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 173{ 174 int ret = 0; 175 176 might_sleep(); 177 178 if (!local->use_chanctx) 179 changed |= ieee80211_hw_conf_chan(local); 180 else 181 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 182 IEEE80211_CONF_CHANGE_POWER); 183 184 if (changed && local->open_count) { 185 ret = drv_config(local, changed); 186 /* 187 * Goal: 188 * HW reconfiguration should never fail, the driver has told 189 * us what it can support so it should live up to that promise. 190 * 191 * Current status: 192 * rfkill is not integrated with mac80211 and a 193 * configuration command can thus fail if hardware rfkill 194 * is enabled 195 * 196 * FIXME: integrate rfkill with mac80211 and then add this 197 * WARN_ON() back 198 * 199 */ 200 /* WARN_ON(ret); */ 201 } 202 203 return ret; 204} 205 206void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 207 u32 changed) 208{ 209 struct ieee80211_local *local = sdata->local; 210 static const u8 zero[ETH_ALEN] = { 0 }; 211 212 if (!changed) 213 return; 214 215 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 216 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 217 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 218 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 219 else if (sdata->vif.type == NL80211_IFTYPE_AP) 220 sdata->vif.bss_conf.bssid = sdata->vif.addr; 221 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 222 sdata->vif.bss_conf.bssid = NULL; 223 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 224 sdata->vif.bss_conf.bssid = zero; 225 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { 226 sdata->vif.bss_conf.bssid = sdata->vif.addr; 227 WARN_ONCE(changed & ~(BSS_CHANGED_IDLE), 228 "P2P Device BSS changed %#x", changed); 229 } else { 230 WARN_ON(1); 231 return; 232 } 233 234 switch (sdata->vif.type) { 235 case NL80211_IFTYPE_AP: 236 case NL80211_IFTYPE_ADHOC: 237 case NL80211_IFTYPE_WDS: 238 case NL80211_IFTYPE_MESH_POINT: 239 break; 240 default: 241 /* do not warn to simplify caller in scan.c */ 242 changed &= ~BSS_CHANGED_BEACON_ENABLED; 243 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 244 return; 245 break; 246 } 247 248 if (changed & BSS_CHANGED_BEACON_ENABLED) { 249 if (local->quiescing || !ieee80211_sdata_running(sdata) || 250 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) { 251 sdata->vif.bss_conf.enable_beacon = false; 252 } else { 253 /* 254 * Beacon should be enabled, but AP mode must 255 * check whether there is a beacon configured. 256 */ 257 switch (sdata->vif.type) { 258 case NL80211_IFTYPE_AP: 259 sdata->vif.bss_conf.enable_beacon = 260 !!sdata->u.ap.beacon; 261 break; 262 case NL80211_IFTYPE_ADHOC: 263 sdata->vif.bss_conf.enable_beacon = 264 !!sdata->u.ibss.presp; 265 break; 266#ifdef CONFIG_MAC80211_MESH 267 case NL80211_IFTYPE_MESH_POINT: 268 sdata->vif.bss_conf.enable_beacon = 269 !!sdata->u.mesh.mesh_id_len; 270 break; 271#endif 272 default: 273 /* not reached */ 274 WARN_ON(1); 275 break; 276 } 277 } 278 } 279 280 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 281} 282 283u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 284{ 285 sdata->vif.bss_conf.use_cts_prot = false; 286 sdata->vif.bss_conf.use_short_preamble = false; 287 sdata->vif.bss_conf.use_short_slot = false; 288 return BSS_CHANGED_ERP_CTS_PROT | 289 BSS_CHANGED_ERP_PREAMBLE | 290 BSS_CHANGED_ERP_SLOT; 291} 292 293static void ieee80211_tasklet_handler(unsigned long data) 294{ 295 struct ieee80211_local *local = (struct ieee80211_local *) data; 296 struct sta_info *sta, *tmp; 297 struct skb_eosp_msg_data *eosp_data; 298 struct sk_buff *skb; 299 300 while ((skb = skb_dequeue(&local->skb_queue)) || 301 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 302 switch (skb->pkt_type) { 303 case IEEE80211_RX_MSG: 304 /* Clear skb->pkt_type in order to not confuse kernel 305 * netstack. */ 306 skb->pkt_type = 0; 307 ieee80211_rx(&local->hw, skb); 308 break; 309 case IEEE80211_TX_STATUS_MSG: 310 skb->pkt_type = 0; 311 ieee80211_tx_status(&local->hw, skb); 312 break; 313 case IEEE80211_EOSP_MSG: 314 eosp_data = (void *)skb->cb; 315 for_each_sta_info(local, eosp_data->sta, sta, tmp) { 316 /* skip wrong virtual interface */ 317 if (memcmp(eosp_data->iface, 318 sta->sdata->vif.addr, ETH_ALEN)) 319 continue; 320 clear_sta_flag(sta, WLAN_STA_SP); 321 break; 322 } 323 dev_kfree_skb(skb); 324 break; 325 default: 326 WARN(1, "mac80211: Packet is of unknown type %d\n", 327 skb->pkt_type); 328 dev_kfree_skb(skb); 329 break; 330 } 331 } 332} 333 334static void ieee80211_restart_work(struct work_struct *work) 335{ 336 struct ieee80211_local *local = 337 container_of(work, struct ieee80211_local, restart_work); 338 339 /* wait for scan work complete */ 340 flush_workqueue(local->workqueue); 341 342 mutex_lock(&local->mtx); 343 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 344 rcu_dereference_protected(local->sched_scan_sdata, 345 lockdep_is_held(&local->mtx)), 346 "%s called with hardware scan in progress\n", __func__); 347 mutex_unlock(&local->mtx); 348 349 rtnl_lock(); 350 ieee80211_scan_cancel(local); 351 ieee80211_reconfig(local); 352 rtnl_unlock(); 353} 354 355void ieee80211_restart_hw(struct ieee80211_hw *hw) 356{ 357 struct ieee80211_local *local = hw_to_local(hw); 358 359 trace_api_restart_hw(local); 360 361 wiphy_info(hw->wiphy, 362 "Hardware restart was requested\n"); 363 364 /* use this reason, ieee80211_reconfig will unblock it */ 365 ieee80211_stop_queues_by_reason(hw, 366 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 367 368 /* 369 * Stop all Rx during the reconfig. We don't want state changes 370 * or driver callbacks while this is in progress. 371 */ 372 local->in_reconfig = true; 373 barrier(); 374 375 schedule_work(&local->restart_work); 376} 377EXPORT_SYMBOL(ieee80211_restart_hw); 378 379#ifdef CONFIG_INET 380static int ieee80211_ifa_changed(struct notifier_block *nb, 381 unsigned long data, void *arg) 382{ 383 struct in_ifaddr *ifa = arg; 384 struct ieee80211_local *local = 385 container_of(nb, struct ieee80211_local, 386 ifa_notifier); 387 struct net_device *ndev = ifa->ifa_dev->dev; 388 struct wireless_dev *wdev = ndev->ieee80211_ptr; 389 struct in_device *idev; 390 struct ieee80211_sub_if_data *sdata; 391 struct ieee80211_bss_conf *bss_conf; 392 struct ieee80211_if_managed *ifmgd; 393 int c = 0; 394 395 /* Make sure it's our interface that got changed */ 396 if (!wdev) 397 return NOTIFY_DONE; 398 399 if (wdev->wiphy != local->hw.wiphy) 400 return NOTIFY_DONE; 401 402 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 403 bss_conf = &sdata->vif.bss_conf; 404 405 /* ARP filtering is only supported in managed mode */ 406 if (sdata->vif.type != NL80211_IFTYPE_STATION) 407 return NOTIFY_DONE; 408 409 idev = __in_dev_get_rtnl(sdata->dev); 410 if (!idev) 411 return NOTIFY_DONE; 412 413 ifmgd = &sdata->u.mgd; 414 mutex_lock(&ifmgd->mtx); 415 416 /* Copy the addresses to the bss_conf list */ 417 ifa = idev->ifa_list; 418 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 419 bss_conf->arp_addr_list[c] = ifa->ifa_address; 420 ifa = ifa->ifa_next; 421 c++; 422 } 423 424 /* If not all addresses fit the list, disable filtering */ 425 if (ifa) { 426 sdata->arp_filter_state = false; 427 c = 0; 428 } else { 429 sdata->arp_filter_state = true; 430 } 431 bss_conf->arp_addr_cnt = c; 432 433 /* Configure driver only if associated (which also implies it is up) */ 434 if (ifmgd->associated) { 435 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 436 ieee80211_bss_info_change_notify(sdata, 437 BSS_CHANGED_ARP_FILTER); 438 } 439 440 mutex_unlock(&ifmgd->mtx); 441 442 return NOTIFY_DONE; 443} 444#endif 445 446static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 447{ 448 struct ieee80211_local *local = 449 container_of(napi, struct ieee80211_local, napi); 450 451 return local->ops->napi_poll(&local->hw, budget); 452} 453 454void ieee80211_napi_schedule(struct ieee80211_hw *hw) 455{ 456 struct ieee80211_local *local = hw_to_local(hw); 457 458 napi_schedule(&local->napi); 459} 460EXPORT_SYMBOL(ieee80211_napi_schedule); 461 462void ieee80211_napi_complete(struct ieee80211_hw *hw) 463{ 464 struct ieee80211_local *local = hw_to_local(hw); 465 466 napi_complete(&local->napi); 467} 468EXPORT_SYMBOL(ieee80211_napi_complete); 469 470/* There isn't a lot of sense in it, but you can transmit anything you like */ 471static const struct ieee80211_txrx_stypes 472ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 473 [NL80211_IFTYPE_ADHOC] = { 474 .tx = 0xffff, 475 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 476 BIT(IEEE80211_STYPE_AUTH >> 4) | 477 BIT(IEEE80211_STYPE_DEAUTH >> 4), 478 }, 479 [NL80211_IFTYPE_STATION] = { 480 .tx = 0xffff, 481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 483 }, 484 [NL80211_IFTYPE_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_AP_VLAN] = { 495 /* copy AP */ 496 .tx = 0xffff, 497 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 498 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 499 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 500 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 501 BIT(IEEE80211_STYPE_AUTH >> 4) | 502 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 503 BIT(IEEE80211_STYPE_ACTION >> 4), 504 }, 505 [NL80211_IFTYPE_P2P_CLIENT] = { 506 .tx = 0xffff, 507 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 508 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 509 }, 510 [NL80211_IFTYPE_P2P_GO] = { 511 .tx = 0xffff, 512 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 513 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 514 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 515 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 516 BIT(IEEE80211_STYPE_AUTH >> 4) | 517 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 518 BIT(IEEE80211_STYPE_ACTION >> 4), 519 }, 520 [NL80211_IFTYPE_MESH_POINT] = { 521 .tx = 0xffff, 522 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 523 BIT(IEEE80211_STYPE_AUTH >> 4) | 524 BIT(IEEE80211_STYPE_DEAUTH >> 4), 525 }, 526 [NL80211_IFTYPE_P2P_DEVICE] = { 527 .tx = 0xffff, 528 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 529 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 530 }, 531}; 532 533static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 534 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 535 IEEE80211_HT_AMPDU_PARM_DENSITY, 536 537 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 538 IEEE80211_HT_CAP_MAX_AMSDU | 539 IEEE80211_HT_CAP_SGI_40), 540 .mcs = { 541 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 542 0xff, 0xff, 0xff, 0xff, 0xff, }, 543 }, 544}; 545 546struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 547 const struct ieee80211_ops *ops) 548{ 549 struct ieee80211_local *local; 550 int priv_size, i; 551 struct wiphy *wiphy; 552 bool use_chanctx; 553 554 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 555 !ops->add_interface || !ops->remove_interface || 556 !ops->configure_filter)) 557 return NULL; 558 559 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 560 return NULL; 561 562 /* check all or no channel context operations exist */ 563 i = !!ops->add_chanctx + !!ops->remove_chanctx + 564 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 565 !!ops->unassign_vif_chanctx; 566 if (WARN_ON(i != 0 && i != 5)) 567 return NULL; 568 use_chanctx = i == 5; 569 570 /* Ensure 32-byte alignment of our private data and hw private data. 571 * We use the wiphy priv data for both our ieee80211_local and for 572 * the driver's private data 573 * 574 * In memory it'll be like this: 575 * 576 * +-------------------------+ 577 * | struct wiphy | 578 * +-------------------------+ 579 * | struct ieee80211_local | 580 * +-------------------------+ 581 * | driver's private data | 582 * +-------------------------+ 583 * 584 */ 585 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 586 587 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 588 589 if (!wiphy) 590 return NULL; 591 592 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 593 594 wiphy->privid = mac80211_wiphy_privid; 595 596 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 597 WIPHY_FLAG_4ADDR_AP | 598 WIPHY_FLAG_4ADDR_STATION | 599 WIPHY_FLAG_REPORTS_OBSS | 600 WIPHY_FLAG_OFFCHAN_TX; 601 602 if (ops->remain_on_channel) 603 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 604 605 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 606 NL80211_FEATURE_SAE | 607 NL80211_FEATURE_HT_IBSS | 608 NL80211_FEATURE_VIF_TXPOWER; 609 610 if (!ops->hw_scan) 611 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 612 NL80211_FEATURE_AP_SCAN; 613 614 615 if (!ops->set_key) 616 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 617 618 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 619 620 local = wiphy_priv(wiphy); 621 622 local->hw.wiphy = wiphy; 623 624 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 625 626 local->ops = ops; 627 local->use_chanctx = use_chanctx; 628 629 /* set up some defaults */ 630 local->hw.queues = 1; 631 local->hw.max_rates = 1; 632 local->hw.max_report_rates = 0; 633 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 634 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 635 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 636 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 637 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 638 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 639 IEEE80211_RADIOTAP_MCS_HAVE_GI | 640 IEEE80211_RADIOTAP_MCS_HAVE_BW; 641 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 642 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 643 644 INIT_LIST_HEAD(&local->interfaces); 645 646 __hw_addr_init(&local->mc_list); 647 648 mutex_init(&local->iflist_mtx); 649 mutex_init(&local->mtx); 650 651 mutex_init(&local->key_mtx); 652 spin_lock_init(&local->filter_lock); 653 spin_lock_init(&local->queue_stop_reason_lock); 654 655 INIT_LIST_HEAD(&local->chanctx_list); 656 mutex_init(&local->chanctx_mtx); 657 658 /* 659 * The rx_skb_queue is only accessed from tasklets, 660 * but other SKB queues are used from within IRQ 661 * context. Therefore, this one needs a different 662 * locking class so our direct, non-irq-safe use of 663 * the queue's lock doesn't throw lockdep warnings. 664 */ 665 skb_queue_head_init_class(&local->rx_skb_queue, 666 &ieee80211_rx_skb_queue_class); 667 668 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 669 670 INIT_WORK(&local->restart_work, ieee80211_restart_work); 671 672 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 673 local->smps_mode = IEEE80211_SMPS_OFF; 674 675 INIT_WORK(&local->dynamic_ps_enable_work, 676 ieee80211_dynamic_ps_enable_work); 677 INIT_WORK(&local->dynamic_ps_disable_work, 678 ieee80211_dynamic_ps_disable_work); 679 setup_timer(&local->dynamic_ps_timer, 680 ieee80211_dynamic_ps_timer, (unsigned long) local); 681 682 INIT_WORK(&local->sched_scan_stopped_work, 683 ieee80211_sched_scan_stopped_work); 684 685 spin_lock_init(&local->ack_status_lock); 686 idr_init(&local->ack_status_frames); 687 /* preallocate at least one entry */ 688 idr_pre_get(&local->ack_status_frames, GFP_KERNEL); 689 690 sta_info_init(local); 691 692 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 693 skb_queue_head_init(&local->pending[i]); 694 atomic_set(&local->agg_queue_stop[i], 0); 695 } 696 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 697 (unsigned long)local); 698 699 tasklet_init(&local->tasklet, 700 ieee80211_tasklet_handler, 701 (unsigned long) local); 702 703 skb_queue_head_init(&local->skb_queue); 704 skb_queue_head_init(&local->skb_queue_unreliable); 705 706 /* init dummy netdev for use w/ NAPI */ 707 init_dummy_netdev(&local->napi_dev); 708 709 ieee80211_led_names(local); 710 711 ieee80211_roc_setup(local); 712 713 return &local->hw; 714} 715EXPORT_SYMBOL(ieee80211_alloc_hw); 716 717int ieee80211_register_hw(struct ieee80211_hw *hw) 718{ 719 struct ieee80211_local *local = hw_to_local(hw); 720 int result, i; 721 enum ieee80211_band band; 722 int channels, max_bitrates; 723 bool supp_ht, supp_vht; 724 netdev_features_t feature_whitelist; 725 static const u32 cipher_suites[] = { 726 /* keep WEP first, it may be removed below */ 727 WLAN_CIPHER_SUITE_WEP40, 728 WLAN_CIPHER_SUITE_WEP104, 729 WLAN_CIPHER_SUITE_TKIP, 730 WLAN_CIPHER_SUITE_CCMP, 731 732 /* keep last -- depends on hw flags! */ 733 WLAN_CIPHER_SUITE_AES_CMAC 734 }; 735 736 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 737 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 738 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 739 return -EINVAL; 740 741#ifdef CONFIG_PM 742 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 743 (!local->ops->suspend || !local->ops->resume)) 744 return -EINVAL; 745#endif 746 747 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan) 748 return -EINVAL; 749 750 if (!local->use_chanctx) { 751 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 752 const struct ieee80211_iface_combination *comb; 753 754 comb = &local->hw.wiphy->iface_combinations[i]; 755 756 if (comb->num_different_channels > 1) 757 return -EINVAL; 758 } 759 } else { 760 /* 761 * WDS is currently prohibited when channel contexts are used 762 * because there's no clear definition of which channel WDS 763 * type interfaces use 764 */ 765 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 766 return -EINVAL; 767 } 768 769 /* Only HW csum features are currently compatible with mac80211 */ 770 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 771 NETIF_F_HW_CSUM; 772 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 773 return -EINVAL; 774 775 if (hw->max_report_rates == 0) 776 hw->max_report_rates = hw->max_rates; 777 778 local->rx_chains = 1; 779 780 /* 781 * generic code guarantees at least one band, 782 * set this very early because much code assumes 783 * that hw.conf.channel is assigned 784 */ 785 channels = 0; 786 max_bitrates = 0; 787 supp_ht = false; 788 supp_vht = false; 789 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 790 struct ieee80211_supported_band *sband; 791 792 sband = local->hw.wiphy->bands[band]; 793 if (!sband) 794 continue; 795 if (!local->use_chanctx && !local->_oper_channel) { 796 /* init channel we're on */ 797 local->hw.conf.channel = 798 local->_oper_channel = &sband->channels[0]; 799 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 800 } 801 cfg80211_chandef_create(&local->monitor_chandef, 802 &sband->channels[0], 803 NL80211_CHAN_NO_HT); 804 channels += sband->n_channels; 805 806 if (max_bitrates < sband->n_bitrates) 807 max_bitrates = sband->n_bitrates; 808 supp_ht = supp_ht || sband->ht_cap.ht_supported; 809 supp_vht = supp_vht || sband->vht_cap.vht_supported; 810 811 if (sband->ht_cap.ht_supported) 812 local->rx_chains = 813 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 814 local->rx_chains); 815 816 /* TODO: consider VHT for RX chains, hopefully it's the same */ 817 } 818 819 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 820 sizeof(void *) * channels, GFP_KERNEL); 821 if (!local->int_scan_req) 822 return -ENOMEM; 823 824 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 825 if (!local->hw.wiphy->bands[band]) 826 continue; 827 local->int_scan_req->rates[band] = (u32) -1; 828 } 829 830 /* if low-level driver supports AP, we also support VLAN */ 831 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 832 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 833 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 834 } 835 836 /* mac80211 always supports monitor */ 837 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 838 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 839 840 /* mac80211 doesn't support more than one IBSS interface right now */ 841 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 842 const struct ieee80211_iface_combination *c; 843 int j; 844 845 c = &hw->wiphy->iface_combinations[i]; 846 847 for (j = 0; j < c->n_limits; j++) 848 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 849 c->limits[j].max > 1) 850 return -EINVAL; 851 } 852 853#ifndef CONFIG_MAC80211_MESH 854 /* mesh depends on Kconfig, but drivers should set it if they want */ 855 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 856#endif 857 858 /* if the underlying driver supports mesh, mac80211 will (at least) 859 * provide routing of mesh authentication frames to userspace */ 860 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 861 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 862 863 /* mac80211 supports control port protocol changing */ 864 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 865 866 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 867 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 868 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 869 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 870 871 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 872 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 873 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 874 875 /* 876 * Calculate scan IE length -- we need this to alloc 877 * memory and to subtract from the driver limit. It 878 * includes the DS Params, (extended) supported rates, and HT 879 * information -- SSID is the driver's responsibility. 880 */ 881 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 882 3 /* DS Params */; 883 if (supp_ht) 884 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 885 886 if (supp_vht) { 887 local->scan_ies_len += 888 2 + sizeof(struct ieee80211_vht_cap); 889 890 /* 891 * (for now at least), drivers wanting to use VHT must 892 * support channel contexts, as they contain all the 893 * necessary VHT information and the global hw config 894 * doesn't (yet) 895 */ 896 if (WARN_ON(!local->use_chanctx)) { 897 result = -EINVAL; 898 goto fail_wiphy_register; 899 } 900 } 901 902 if (!local->ops->hw_scan) { 903 /* For hw_scan, driver needs to set these up. */ 904 local->hw.wiphy->max_scan_ssids = 4; 905 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 906 } 907 908 /* 909 * If the driver supports any scan IEs, then assume the 910 * limit includes the IEs mac80211 will add, otherwise 911 * leave it at zero and let the driver sort it out; we 912 * still pass our IEs to the driver but userspace will 913 * not be allowed to in that case. 914 */ 915 if (local->hw.wiphy->max_scan_ie_len) 916 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 917 918 /* Set up cipher suites unless driver already did */ 919 if (!local->hw.wiphy->cipher_suites) { 920 local->hw.wiphy->cipher_suites = cipher_suites; 921 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 922 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 923 local->hw.wiphy->n_cipher_suites--; 924 } 925 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 926 if (local->hw.wiphy->cipher_suites == cipher_suites) { 927 local->hw.wiphy->cipher_suites += 2; 928 local->hw.wiphy->n_cipher_suites -= 2; 929 } else { 930 u32 *suites; 931 int r, w = 0; 932 933 /* Filter out WEP */ 934 935 suites = kmemdup( 936 local->hw.wiphy->cipher_suites, 937 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 938 GFP_KERNEL); 939 if (!suites) 940 return -ENOMEM; 941 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 942 u32 suite = local->hw.wiphy->cipher_suites[r]; 943 if (suite == WLAN_CIPHER_SUITE_WEP40 || 944 suite == WLAN_CIPHER_SUITE_WEP104) 945 continue; 946 suites[w++] = suite; 947 } 948 local->hw.wiphy->cipher_suites = suites; 949 local->hw.wiphy->n_cipher_suites = w; 950 local->wiphy_ciphers_allocated = true; 951 } 952 } 953 954 if (!local->ops->remain_on_channel) 955 local->hw.wiphy->max_remain_on_channel_duration = 5000; 956 957 if (local->ops->sched_scan_start) 958 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 959 960 /* mac80211 based drivers don't support internal TDLS setup */ 961 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 962 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 963 964 result = wiphy_register(local->hw.wiphy); 965 if (result < 0) 966 goto fail_wiphy_register; 967 968 /* 969 * We use the number of queues for feature tests (QoS, HT) internally 970 * so restrict them appropriately. 971 */ 972 if (hw->queues > IEEE80211_MAX_QUEUES) 973 hw->queues = IEEE80211_MAX_QUEUES; 974 975 local->workqueue = 976 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 977 if (!local->workqueue) { 978 result = -ENOMEM; 979 goto fail_workqueue; 980 } 981 982 /* 983 * The hardware needs headroom for sending the frame, 984 * and we need some headroom for passing the frame to monitor 985 * interfaces, but never both at the same time. 986 */ 987 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 988 IEEE80211_TX_STATUS_HEADROOM); 989 990 debugfs_hw_add(local); 991 992 /* 993 * if the driver doesn't specify a max listen interval we 994 * use 5 which should be a safe default 995 */ 996 if (local->hw.max_listen_interval == 0) 997 local->hw.max_listen_interval = 5; 998 999 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1000 1001 local->dynamic_ps_forced_timeout = -1; 1002 1003 result = ieee80211_wep_init(local); 1004 if (result < 0) 1005 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1006 result); 1007 1008 ieee80211_led_init(local); 1009 1010 rtnl_lock(); 1011 1012 result = ieee80211_init_rate_ctrl_alg(local, 1013 hw->rate_control_algorithm); 1014 if (result < 0) { 1015 wiphy_debug(local->hw.wiphy, 1016 "Failed to initialize rate control algorithm\n"); 1017 goto fail_rate; 1018 } 1019 1020 /* add one default STA interface if supported */ 1021 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 1022 result = ieee80211_if_add(local, "wlan%d", NULL, 1023 NL80211_IFTYPE_STATION, NULL); 1024 if (result) 1025 wiphy_warn(local->hw.wiphy, 1026 "Failed to add default virtual iface\n"); 1027 } 1028 1029 rtnl_unlock(); 1030 1031 local->network_latency_notifier.notifier_call = 1032 ieee80211_max_network_latency; 1033 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1034 &local->network_latency_notifier); 1035 if (result) { 1036 rtnl_lock(); 1037 goto fail_pm_qos; 1038 } 1039 1040#ifdef CONFIG_INET 1041 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1042 result = register_inetaddr_notifier(&local->ifa_notifier); 1043 if (result) 1044 goto fail_ifa; 1045#endif 1046 1047 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 1048 local->hw.napi_weight); 1049 1050 return 0; 1051 1052#ifdef CONFIG_INET 1053 fail_ifa: 1054 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1055 &local->network_latency_notifier); 1056 rtnl_lock(); 1057#endif 1058 fail_pm_qos: 1059 ieee80211_led_exit(local); 1060 ieee80211_remove_interfaces(local); 1061 fail_rate: 1062 rtnl_unlock(); 1063 ieee80211_wep_free(local); 1064 sta_info_stop(local); 1065 destroy_workqueue(local->workqueue); 1066 fail_workqueue: 1067 wiphy_unregister(local->hw.wiphy); 1068 fail_wiphy_register: 1069 if (local->wiphy_ciphers_allocated) 1070 kfree(local->hw.wiphy->cipher_suites); 1071 kfree(local->int_scan_req); 1072 return result; 1073} 1074EXPORT_SYMBOL(ieee80211_register_hw); 1075 1076void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1077{ 1078 struct ieee80211_local *local = hw_to_local(hw); 1079 1080 tasklet_kill(&local->tx_pending_tasklet); 1081 tasklet_kill(&local->tasklet); 1082 1083 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1084 &local->network_latency_notifier); 1085#ifdef CONFIG_INET 1086 unregister_inetaddr_notifier(&local->ifa_notifier); 1087#endif 1088 1089 rtnl_lock(); 1090 1091 /* 1092 * At this point, interface list manipulations are fine 1093 * because the driver cannot be handing us frames any 1094 * more and the tasklet is killed. 1095 */ 1096 ieee80211_remove_interfaces(local); 1097 1098 rtnl_unlock(); 1099 1100 cancel_work_sync(&local->restart_work); 1101 cancel_work_sync(&local->reconfig_filter); 1102 1103 ieee80211_clear_tx_pending(local); 1104 rate_control_deinitialize(local); 1105 1106 if (skb_queue_len(&local->skb_queue) || 1107 skb_queue_len(&local->skb_queue_unreliable)) 1108 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1109 skb_queue_purge(&local->skb_queue); 1110 skb_queue_purge(&local->skb_queue_unreliable); 1111 skb_queue_purge(&local->rx_skb_queue); 1112 1113 destroy_workqueue(local->workqueue); 1114 wiphy_unregister(local->hw.wiphy); 1115 sta_info_stop(local); 1116 ieee80211_wep_free(local); 1117 ieee80211_led_exit(local); 1118 kfree(local->int_scan_req); 1119} 1120EXPORT_SYMBOL(ieee80211_unregister_hw); 1121 1122static int ieee80211_free_ack_frame(int id, void *p, void *data) 1123{ 1124 WARN_ONCE(1, "Have pending ack frames!\n"); 1125 kfree_skb(p); 1126 return 0; 1127} 1128 1129void ieee80211_free_hw(struct ieee80211_hw *hw) 1130{ 1131 struct ieee80211_local *local = hw_to_local(hw); 1132 1133 mutex_destroy(&local->iflist_mtx); 1134 mutex_destroy(&local->mtx); 1135 1136 if (local->wiphy_ciphers_allocated) 1137 kfree(local->hw.wiphy->cipher_suites); 1138 1139 idr_for_each(&local->ack_status_frames, 1140 ieee80211_free_ack_frame, NULL); 1141 idr_destroy(&local->ack_status_frames); 1142 1143 wiphy_free(local->hw.wiphy); 1144} 1145EXPORT_SYMBOL(ieee80211_free_hw); 1146 1147static int __init ieee80211_init(void) 1148{ 1149 struct sk_buff *skb; 1150 int ret; 1151 1152 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1153 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1154 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1155 1156 ret = rc80211_minstrel_init(); 1157 if (ret) 1158 return ret; 1159 1160 ret = rc80211_minstrel_ht_init(); 1161 if (ret) 1162 goto err_minstrel; 1163 1164 ret = rc80211_pid_init(); 1165 if (ret) 1166 goto err_pid; 1167 1168 ret = ieee80211_iface_init(); 1169 if (ret) 1170 goto err_netdev; 1171 1172 return 0; 1173 err_netdev: 1174 rc80211_pid_exit(); 1175 err_pid: 1176 rc80211_minstrel_ht_exit(); 1177 err_minstrel: 1178 rc80211_minstrel_exit(); 1179 1180 return ret; 1181} 1182 1183static void __exit ieee80211_exit(void) 1184{ 1185 rc80211_pid_exit(); 1186 rc80211_minstrel_ht_exit(); 1187 rc80211_minstrel_exit(); 1188 1189 if (mesh_allocated) 1190 ieee80211s_stop(); 1191 1192 ieee80211_iface_exit(); 1193 1194 rcu_barrier(); 1195} 1196 1197 1198subsys_initcall(ieee80211_init); 1199module_exit(ieee80211_exit); 1200 1201MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1202MODULE_LICENSE("GPL"); 1203