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 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12#include <net/mac80211.h> 13#include <linux/module.h> 14#include <linux/init.h> 15#include <linux/netdevice.h> 16#include <linux/types.h> 17#include <linux/slab.h> 18#include <linux/skbuff.h> 19#include <linux/etherdevice.h> 20#include <linux/if_arp.h> 21#include <linux/rtnetlink.h> 22#include <linux/bitmap.h> 23#include <linux/pm_qos.h> 24#include <linux/inetdevice.h> 25#include <net/net_namespace.h> 26#include <net/cfg80211.h> 27#include <net/addrconf.h> 28 29#include "ieee80211_i.h" 30#include "driver-ops.h" 31#include "rate.h" 32#include "mesh.h" 33#include "wep.h" 34#include "led.h" 35#include "cfg.h" 36#include "debugfs.h" 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 cfg80211_chan_def chandef = {}; 100 u32 changed = 0; 101 int power; 102 u32 offchannel_flag; 103 104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 105 106 if (local->scan_chandef.chan) { 107 chandef = local->scan_chandef; 108 } else if (local->tmp_channel) { 109 chandef.chan = local->tmp_channel; 110 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 111 chandef.center_freq1 = chandef.chan->center_freq; 112 } else 113 chandef = local->_oper_chandef; 114 115 WARN(!cfg80211_chandef_valid(&chandef), 116 "control:%d MHz width:%d center: %d/%d MHz", 117 chandef.chan->center_freq, chandef.width, 118 chandef.center_freq1, chandef.center_freq2); 119 120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 122 else 123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 124 125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 126 127 if (offchannel_flag || 128 !cfg80211_chandef_identical(&local->hw.conf.chandef, 129 &local->_oper_chandef)) { 130 local->hw.conf.chandef = chandef; 131 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 132 } 133 134 if (!conf_is_ht(&local->hw.conf)) { 135 /* 136 * mac80211.h documents that this is only valid 137 * when the channel is set to an HT type, and 138 * that otherwise STATIC is used. 139 */ 140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 141 } else if (local->hw.conf.smps_mode != local->smps_mode) { 142 local->hw.conf.smps_mode = local->smps_mode; 143 changed |= IEEE80211_CONF_CHANGE_SMPS; 144 } 145 146 power = ieee80211_chandef_max_power(&chandef); 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 150 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 151 continue; 152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 153 continue; 154 power = min(power, sdata->vif.bss_conf.txpower); 155 } 156 rcu_read_unlock(); 157 158 if (local->hw.conf.power_level != power) { 159 changed |= IEEE80211_CONF_CHANGE_POWER; 160 local->hw.conf.power_level = power; 161 } 162 163 return changed; 164} 165 166int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 167{ 168 int ret = 0; 169 170 might_sleep(); 171 172 if (!local->use_chanctx) 173 changed |= ieee80211_hw_conf_chan(local); 174 else 175 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 176 IEEE80211_CONF_CHANGE_POWER); 177 178 if (changed && local->open_count) { 179 ret = drv_config(local, changed); 180 /* 181 * Goal: 182 * HW reconfiguration should never fail, the driver has told 183 * us what it can support so it should live up to that promise. 184 * 185 * Current status: 186 * rfkill is not integrated with mac80211 and a 187 * configuration command can thus fail if hardware rfkill 188 * is enabled 189 * 190 * FIXME: integrate rfkill with mac80211 and then add this 191 * WARN_ON() back 192 * 193 */ 194 /* WARN_ON(ret); */ 195 } 196 197 return ret; 198} 199 200void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 201 u32 changed) 202{ 203 struct ieee80211_local *local = sdata->local; 204 205 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 206 return; 207 208 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 209} 210 211u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 212{ 213 sdata->vif.bss_conf.use_cts_prot = false; 214 sdata->vif.bss_conf.use_short_preamble = false; 215 sdata->vif.bss_conf.use_short_slot = false; 216 return BSS_CHANGED_ERP_CTS_PROT | 217 BSS_CHANGED_ERP_PREAMBLE | 218 BSS_CHANGED_ERP_SLOT; 219} 220 221static void ieee80211_tasklet_handler(unsigned long data) 222{ 223 struct ieee80211_local *local = (struct ieee80211_local *) data; 224 struct sk_buff *skb; 225 226 while ((skb = skb_dequeue(&local->skb_queue)) || 227 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 228 switch (skb->pkt_type) { 229 case IEEE80211_RX_MSG: 230 /* Clear skb->pkt_type in order to not confuse kernel 231 * netstack. */ 232 skb->pkt_type = 0; 233 ieee80211_rx(&local->hw, skb); 234 break; 235 case IEEE80211_TX_STATUS_MSG: 236 skb->pkt_type = 0; 237 ieee80211_tx_status(&local->hw, skb); 238 break; 239 default: 240 WARN(1, "mac80211: Packet is of unknown type %d\n", 241 skb->pkt_type); 242 dev_kfree_skb(skb); 243 break; 244 } 245 } 246} 247 248static void ieee80211_restart_work(struct work_struct *work) 249{ 250 struct ieee80211_local *local = 251 container_of(work, struct ieee80211_local, restart_work); 252 struct ieee80211_sub_if_data *sdata; 253 254 /* wait for scan work complete */ 255 flush_workqueue(local->workqueue); 256 257 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 258 "%s called with hardware scan in progress\n", __func__); 259 260 rtnl_lock(); 261 list_for_each_entry(sdata, &local->interfaces, list) 262 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 263 ieee80211_scan_cancel(local); 264 ieee80211_reconfig(local); 265 rtnl_unlock(); 266} 267 268void ieee80211_restart_hw(struct ieee80211_hw *hw) 269{ 270 struct ieee80211_local *local = hw_to_local(hw); 271 272 trace_api_restart_hw(local); 273 274 wiphy_info(hw->wiphy, 275 "Hardware restart was requested\n"); 276 277 /* use this reason, ieee80211_reconfig will unblock it */ 278 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 279 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 280 false); 281 282 /* 283 * Stop all Rx during the reconfig. We don't want state changes 284 * or driver callbacks while this is in progress. 285 */ 286 local->in_reconfig = true; 287 barrier(); 288 289 schedule_work(&local->restart_work); 290} 291EXPORT_SYMBOL(ieee80211_restart_hw); 292 293#ifdef CONFIG_INET 294static int ieee80211_ifa_changed(struct notifier_block *nb, 295 unsigned long data, void *arg) 296{ 297 struct in_ifaddr *ifa = arg; 298 struct ieee80211_local *local = 299 container_of(nb, struct ieee80211_local, 300 ifa_notifier); 301 struct net_device *ndev = ifa->ifa_dev->dev; 302 struct wireless_dev *wdev = ndev->ieee80211_ptr; 303 struct in_device *idev; 304 struct ieee80211_sub_if_data *sdata; 305 struct ieee80211_bss_conf *bss_conf; 306 struct ieee80211_if_managed *ifmgd; 307 int c = 0; 308 309 /* Make sure it's our interface that got changed */ 310 if (!wdev) 311 return NOTIFY_DONE; 312 313 if (wdev->wiphy != local->hw.wiphy) 314 return NOTIFY_DONE; 315 316 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 317 bss_conf = &sdata->vif.bss_conf; 318 319 /* ARP filtering is only supported in managed mode */ 320 if (sdata->vif.type != NL80211_IFTYPE_STATION) 321 return NOTIFY_DONE; 322 323 idev = __in_dev_get_rtnl(sdata->dev); 324 if (!idev) 325 return NOTIFY_DONE; 326 327 ifmgd = &sdata->u.mgd; 328 sdata_lock(sdata); 329 330 /* Copy the addresses to the bss_conf list */ 331 ifa = idev->ifa_list; 332 while (ifa) { 333 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 334 bss_conf->arp_addr_list[c] = ifa->ifa_address; 335 ifa = ifa->ifa_next; 336 c++; 337 } 338 339 bss_conf->arp_addr_cnt = c; 340 341 /* Configure driver only if associated (which also implies it is up) */ 342 if (ifmgd->associated) 343 ieee80211_bss_info_change_notify(sdata, 344 BSS_CHANGED_ARP_FILTER); 345 346 sdata_unlock(sdata); 347 348 return NOTIFY_OK; 349} 350#endif 351 352#if IS_ENABLED(CONFIG_IPV6) 353static int ieee80211_ifa6_changed(struct notifier_block *nb, 354 unsigned long data, void *arg) 355{ 356 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 357 struct inet6_dev *idev = ifa->idev; 358 struct net_device *ndev = ifa->idev->dev; 359 struct ieee80211_local *local = 360 container_of(nb, struct ieee80211_local, ifa6_notifier); 361 struct wireless_dev *wdev = ndev->ieee80211_ptr; 362 struct ieee80211_sub_if_data *sdata; 363 364 /* Make sure it's our interface that got changed */ 365 if (!wdev || wdev->wiphy != local->hw.wiphy) 366 return NOTIFY_DONE; 367 368 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 369 370 /* 371 * For now only support station mode. This is mostly because 372 * doing AP would have to handle AP_VLAN in some way ... 373 */ 374 if (sdata->vif.type != NL80211_IFTYPE_STATION) 375 return NOTIFY_DONE; 376 377 drv_ipv6_addr_change(local, sdata, idev); 378 379 return NOTIFY_OK; 380} 381#endif 382 383/* There isn't a lot of sense in it, but you can transmit anything you like */ 384static const struct ieee80211_txrx_stypes 385ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 386 [NL80211_IFTYPE_ADHOC] = { 387 .tx = 0xffff, 388 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 389 BIT(IEEE80211_STYPE_AUTH >> 4) | 390 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 392 }, 393 [NL80211_IFTYPE_STATION] = { 394 .tx = 0xffff, 395 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 397 }, 398 [NL80211_IFTYPE_AP] = { 399 .tx = 0xffff, 400 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 401 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 402 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 403 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 404 BIT(IEEE80211_STYPE_AUTH >> 4) | 405 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 406 BIT(IEEE80211_STYPE_ACTION >> 4), 407 }, 408 [NL80211_IFTYPE_AP_VLAN] = { 409 /* copy AP */ 410 .tx = 0xffff, 411 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 412 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 413 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 414 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 415 BIT(IEEE80211_STYPE_AUTH >> 4) | 416 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 417 BIT(IEEE80211_STYPE_ACTION >> 4), 418 }, 419 [NL80211_IFTYPE_P2P_CLIENT] = { 420 .tx = 0xffff, 421 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 423 }, 424 [NL80211_IFTYPE_P2P_GO] = { 425 .tx = 0xffff, 426 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 427 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 429 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 430 BIT(IEEE80211_STYPE_AUTH >> 4) | 431 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 432 BIT(IEEE80211_STYPE_ACTION >> 4), 433 }, 434 [NL80211_IFTYPE_MESH_POINT] = { 435 .tx = 0xffff, 436 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 437 BIT(IEEE80211_STYPE_AUTH >> 4) | 438 BIT(IEEE80211_STYPE_DEAUTH >> 4), 439 }, 440 [NL80211_IFTYPE_P2P_DEVICE] = { 441 .tx = 0xffff, 442 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 443 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 444 }, 445}; 446 447static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 448 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 449 IEEE80211_HT_AMPDU_PARM_DENSITY, 450 451 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 452 IEEE80211_HT_CAP_MAX_AMSDU | 453 IEEE80211_HT_CAP_SGI_20 | 454 IEEE80211_HT_CAP_SGI_40 | 455 IEEE80211_HT_CAP_LDPC_CODING | 456 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 457 .mcs = { 458 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 459 0xff, 0xff, 0xff, 0xff, 0xff, }, 460 }, 461}; 462 463static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 464 .vht_cap_info = 465 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 466 IEEE80211_VHT_CAP_SHORT_GI_80 | 467 IEEE80211_VHT_CAP_SHORT_GI_160 | 468 IEEE80211_VHT_CAP_RXSTBC_1 | 469 IEEE80211_VHT_CAP_RXSTBC_2 | 470 IEEE80211_VHT_CAP_RXSTBC_3 | 471 IEEE80211_VHT_CAP_RXSTBC_4 | 472 IEEE80211_VHT_CAP_TXSTBC | 473 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 474 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 475 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 476 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 477 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 478 .supp_mcs = { 479 .rx_mcs_map = cpu_to_le16(~0), 480 .tx_mcs_map = cpu_to_le16(~0), 481 }, 482}; 483 484struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 485 const struct ieee80211_ops *ops, 486 const char *requested_name) 487{ 488 struct ieee80211_local *local; 489 int priv_size, i; 490 struct wiphy *wiphy; 491 bool use_chanctx; 492 493 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 494 !ops->add_interface || !ops->remove_interface || 495 !ops->configure_filter)) 496 return NULL; 497 498 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 499 return NULL; 500 501 /* check all or no channel context operations exist */ 502 i = !!ops->add_chanctx + !!ops->remove_chanctx + 503 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 504 !!ops->unassign_vif_chanctx; 505 if (WARN_ON(i != 0 && i != 5)) 506 return NULL; 507 use_chanctx = i == 5; 508 509 /* Ensure 32-byte alignment of our private data and hw private data. 510 * We use the wiphy priv data for both our ieee80211_local and for 511 * the driver's private data 512 * 513 * In memory it'll be like this: 514 * 515 * +-------------------------+ 516 * | struct wiphy | 517 * +-------------------------+ 518 * | struct ieee80211_local | 519 * +-------------------------+ 520 * | driver's private data | 521 * +-------------------------+ 522 * 523 */ 524 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 525 526 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 527 528 if (!wiphy) 529 return NULL; 530 531 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 532 533 wiphy->privid = mac80211_wiphy_privid; 534 535 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 536 WIPHY_FLAG_4ADDR_AP | 537 WIPHY_FLAG_4ADDR_STATION | 538 WIPHY_FLAG_REPORTS_OBSS | 539 WIPHY_FLAG_OFFCHAN_TX; 540 541 if (ops->remain_on_channel) 542 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 543 544 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 545 NL80211_FEATURE_SAE | 546 NL80211_FEATURE_HT_IBSS | 547 NL80211_FEATURE_VIF_TXPOWER | 548 NL80211_FEATURE_MAC_ON_CREATE | 549 NL80211_FEATURE_USERSPACE_MPM; 550 551 if (!ops->hw_scan) 552 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 553 NL80211_FEATURE_AP_SCAN; 554 555 556 if (!ops->set_key) 557 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 558 559 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 560 561 local = wiphy_priv(wiphy); 562 563 if (sta_info_init(local)) 564 goto err_free; 565 566 local->hw.wiphy = wiphy; 567 568 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 569 570 local->ops = ops; 571 local->use_chanctx = use_chanctx; 572 573 /* set up some defaults */ 574 local->hw.queues = 1; 575 local->hw.max_rates = 1; 576 local->hw.max_report_rates = 0; 577 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 578 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 579 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 580 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 581 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 582 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 583 IEEE80211_RADIOTAP_MCS_HAVE_GI | 584 IEEE80211_RADIOTAP_MCS_HAVE_BW; 585 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 586 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 587 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 588 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 589 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 590 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 591 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 592 593 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 594 595 wiphy->extended_capabilities = local->ext_capa; 596 wiphy->extended_capabilities_mask = local->ext_capa; 597 wiphy->extended_capabilities_len = 598 ARRAY_SIZE(local->ext_capa); 599 600 INIT_LIST_HEAD(&local->interfaces); 601 602 __hw_addr_init(&local->mc_list); 603 604 mutex_init(&local->iflist_mtx); 605 mutex_init(&local->mtx); 606 607 mutex_init(&local->key_mtx); 608 spin_lock_init(&local->filter_lock); 609 spin_lock_init(&local->rx_path_lock); 610 spin_lock_init(&local->queue_stop_reason_lock); 611 612 INIT_LIST_HEAD(&local->chanctx_list); 613 mutex_init(&local->chanctx_mtx); 614 615 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 616 617 INIT_WORK(&local->restart_work, ieee80211_restart_work); 618 619 INIT_WORK(&local->radar_detected_work, 620 ieee80211_dfs_radar_detected_work); 621 622 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 623 local->smps_mode = IEEE80211_SMPS_OFF; 624 625 INIT_WORK(&local->dynamic_ps_enable_work, 626 ieee80211_dynamic_ps_enable_work); 627 INIT_WORK(&local->dynamic_ps_disable_work, 628 ieee80211_dynamic_ps_disable_work); 629 setup_timer(&local->dynamic_ps_timer, 630 ieee80211_dynamic_ps_timer, (unsigned long) local); 631 632 INIT_WORK(&local->sched_scan_stopped_work, 633 ieee80211_sched_scan_stopped_work); 634 635 spin_lock_init(&local->ack_status_lock); 636 idr_init(&local->ack_status_frames); 637 638 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 639 skb_queue_head_init(&local->pending[i]); 640 atomic_set(&local->agg_queue_stop[i], 0); 641 } 642 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 643 (unsigned long)local); 644 645 tasklet_init(&local->tasklet, 646 ieee80211_tasklet_handler, 647 (unsigned long) local); 648 649 skb_queue_head_init(&local->skb_queue); 650 skb_queue_head_init(&local->skb_queue_unreliable); 651 652 ieee80211_led_names(local); 653 654 ieee80211_roc_setup(local); 655 656 return &local->hw; 657 err_free: 658 wiphy_free(wiphy); 659 return NULL; 660} 661EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 662 663static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 664{ 665 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 666 IS_ERR(local->wep_rx_tfm)); 667 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE; 668 int n_suites = 0, r = 0, w = 0; 669 u32 *suites; 670 static const u32 cipher_suites[] = { 671 /* keep WEP first, it may be removed below */ 672 WLAN_CIPHER_SUITE_WEP40, 673 WLAN_CIPHER_SUITE_WEP104, 674 WLAN_CIPHER_SUITE_TKIP, 675 WLAN_CIPHER_SUITE_CCMP, 676 WLAN_CIPHER_SUITE_CCMP_256, 677 WLAN_CIPHER_SUITE_GCMP, 678 WLAN_CIPHER_SUITE_GCMP_256, 679 680 /* keep last -- depends on hw flags! */ 681 WLAN_CIPHER_SUITE_AES_CMAC, 682 WLAN_CIPHER_SUITE_BIP_CMAC_256, 683 WLAN_CIPHER_SUITE_BIP_GMAC_128, 684 WLAN_CIPHER_SUITE_BIP_GMAC_256, 685 }; 686 687 if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL || 688 local->hw.wiphy->cipher_suites) { 689 /* If the driver advertises, or doesn't support SW crypto, 690 * we only need to remove WEP if necessary. 691 */ 692 if (have_wep) 693 return 0; 694 695 /* well if it has _no_ ciphers ... fine */ 696 if (!local->hw.wiphy->n_cipher_suites) 697 return 0; 698 699 /* Driver provides cipher suites, but we need to exclude WEP */ 700 suites = kmemdup(local->hw.wiphy->cipher_suites, 701 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 702 GFP_KERNEL); 703 if (!suites) 704 return -ENOMEM; 705 706 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 707 u32 suite = local->hw.wiphy->cipher_suites[r]; 708 709 if (suite == WLAN_CIPHER_SUITE_WEP40 || 710 suite == WLAN_CIPHER_SUITE_WEP104) 711 continue; 712 suites[w++] = suite; 713 } 714 } else if (!local->hw.cipher_schemes) { 715 /* If the driver doesn't have cipher schemes, there's nothing 716 * else to do other than assign the (software supported and 717 * perhaps offloaded) cipher suites. 718 */ 719 local->hw.wiphy->cipher_suites = cipher_suites; 720 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 721 722 if (!have_mfp) 723 local->hw.wiphy->n_cipher_suites -= 4; 724 725 if (!have_wep) { 726 local->hw.wiphy->cipher_suites += 2; 727 local->hw.wiphy->n_cipher_suites -= 2; 728 } 729 730 /* not dynamically allocated, so just return */ 731 return 0; 732 } else { 733 const struct ieee80211_cipher_scheme *cs; 734 735 cs = local->hw.cipher_schemes; 736 737 /* Driver specifies cipher schemes only (but not cipher suites 738 * including the schemes) 739 * 740 * We start counting ciphers defined by schemes, TKIP, CCMP, 741 * CCMP-256, GCMP, and GCMP-256 742 */ 743 n_suites = local->hw.n_cipher_schemes + 5; 744 745 /* check if we have WEP40 and WEP104 */ 746 if (have_wep) 747 n_suites += 2; 748 749 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 750 * BIP-GMAC-256 751 */ 752 if (have_mfp) 753 n_suites += 4; 754 755 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 756 if (!suites) 757 return -ENOMEM; 758 759 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 760 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 761 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 762 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 763 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 764 765 if (have_wep) { 766 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 767 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 768 } 769 770 if (have_mfp) { 771 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 772 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 773 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 774 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 775 } 776 777 for (r = 0; r < local->hw.n_cipher_schemes; r++) 778 suites[w++] = cs[r].cipher; 779 } 780 781 local->hw.wiphy->cipher_suites = suites; 782 local->hw.wiphy->n_cipher_suites = w; 783 local->wiphy_ciphers_allocated = true; 784 785 return 0; 786} 787 788int ieee80211_register_hw(struct ieee80211_hw *hw) 789{ 790 struct ieee80211_local *local = hw_to_local(hw); 791 int result, i; 792 enum ieee80211_band band; 793 int channels, max_bitrates; 794 bool supp_ht, supp_vht; 795 netdev_features_t feature_whitelist; 796 struct cfg80211_chan_def dflt_chandef = {}; 797 798 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 799 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 800 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 801 return -EINVAL; 802 803 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 804 (!local->ops->tdls_channel_switch || 805 !local->ops->tdls_cancel_channel_switch || 806 !local->ops->tdls_recv_channel_switch)) 807 return -EOPNOTSUPP; 808 809#ifdef CONFIG_PM 810 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 811 return -EINVAL; 812#endif 813 814 if (!local->use_chanctx) { 815 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 816 const struct ieee80211_iface_combination *comb; 817 818 comb = &local->hw.wiphy->iface_combinations[i]; 819 820 if (comb->num_different_channels > 1) 821 return -EINVAL; 822 } 823 } else { 824 /* 825 * WDS is currently prohibited when channel contexts are used 826 * because there's no clear definition of which channel WDS 827 * type interfaces use 828 */ 829 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 830 return -EINVAL; 831 832 /* DFS is not supported with multi-channel combinations yet */ 833 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 834 const struct ieee80211_iface_combination *comb; 835 836 comb = &local->hw.wiphy->iface_combinations[i]; 837 838 if (comb->radar_detect_widths && 839 comb->num_different_channels > 1) 840 return -EINVAL; 841 } 842 } 843 844 /* Only HW csum features are currently compatible with mac80211 */ 845 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 846 NETIF_F_HW_CSUM; 847 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 848 return -EINVAL; 849 850 if (hw->max_report_rates == 0) 851 hw->max_report_rates = hw->max_rates; 852 853 local->rx_chains = 1; 854 855 /* 856 * generic code guarantees at least one band, 857 * set this very early because much code assumes 858 * that hw.conf.channel is assigned 859 */ 860 channels = 0; 861 max_bitrates = 0; 862 supp_ht = false; 863 supp_vht = false; 864 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 865 struct ieee80211_supported_band *sband; 866 867 sband = local->hw.wiphy->bands[band]; 868 if (!sband) 869 continue; 870 871 if (!dflt_chandef.chan) { 872 cfg80211_chandef_create(&dflt_chandef, 873 &sband->channels[0], 874 NL80211_CHAN_NO_HT); 875 /* init channel we're on */ 876 if (!local->use_chanctx && !local->_oper_chandef.chan) { 877 local->hw.conf.chandef = dflt_chandef; 878 local->_oper_chandef = dflt_chandef; 879 } 880 local->monitor_chandef = dflt_chandef; 881 } 882 883 channels += sband->n_channels; 884 885 if (max_bitrates < sband->n_bitrates) 886 max_bitrates = sband->n_bitrates; 887 supp_ht = supp_ht || sband->ht_cap.ht_supported; 888 supp_vht = supp_vht || sband->vht_cap.vht_supported; 889 890 if (sband->ht_cap.ht_supported) 891 local->rx_chains = 892 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 893 local->rx_chains); 894 895 /* TODO: consider VHT for RX chains, hopefully it's the same */ 896 } 897 898 /* if low-level driver supports AP, we also support VLAN */ 899 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 900 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 901 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 902 } 903 904 /* mac80211 always supports monitor */ 905 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 906 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 907 908 /* mac80211 doesn't support more than one IBSS interface right now */ 909 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 910 const struct ieee80211_iface_combination *c; 911 int j; 912 913 c = &hw->wiphy->iface_combinations[i]; 914 915 for (j = 0; j < c->n_limits; j++) 916 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 917 c->limits[j].max > 1) 918 return -EINVAL; 919 } 920 921 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 922 sizeof(void *) * channels, GFP_KERNEL); 923 if (!local->int_scan_req) 924 return -ENOMEM; 925 926 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 927 if (!local->hw.wiphy->bands[band]) 928 continue; 929 local->int_scan_req->rates[band] = (u32) -1; 930 } 931 932#ifndef CONFIG_MAC80211_MESH 933 /* mesh depends on Kconfig, but drivers should set it if they want */ 934 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 935#endif 936 937 /* if the underlying driver supports mesh, mac80211 will (at least) 938 * provide routing of mesh authentication frames to userspace */ 939 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 940 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 941 942 /* mac80211 supports control port protocol changing */ 943 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 944 945 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { 946 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 947 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { 948 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 949 if (hw->max_signal <= 0) { 950 result = -EINVAL; 951 goto fail_wiphy_register; 952 } 953 } 954 955 /* 956 * Calculate scan IE length -- we need this to alloc 957 * memory and to subtract from the driver limit. It 958 * includes the DS Params, (extended) supported rates, and HT 959 * information -- SSID is the driver's responsibility. 960 */ 961 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 962 3 /* DS Params */; 963 if (supp_ht) 964 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 965 966 if (supp_vht) 967 local->scan_ies_len += 968 2 + sizeof(struct ieee80211_vht_cap); 969 970 if (!local->ops->hw_scan) { 971 /* For hw_scan, driver needs to set these up. */ 972 local->hw.wiphy->max_scan_ssids = 4; 973 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 974 } 975 976 /* 977 * If the driver supports any scan IEs, then assume the 978 * limit includes the IEs mac80211 will add, otherwise 979 * leave it at zero and let the driver sort it out; we 980 * still pass our IEs to the driver but userspace will 981 * not be allowed to in that case. 982 */ 983 if (local->hw.wiphy->max_scan_ie_len) 984 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 985 986 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 987 local->hw.n_cipher_schemes)); 988 989 result = ieee80211_init_cipher_suites(local); 990 if (result < 0) 991 goto fail_wiphy_register; 992 993 if (!local->ops->remain_on_channel) 994 local->hw.wiphy->max_remain_on_channel_duration = 5000; 995 996 /* mac80211 based drivers don't support internal TDLS setup */ 997 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 998 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 999 1000 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1001 if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA) 1002 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1003 1004 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1005 1006 result = wiphy_register(local->hw.wiphy); 1007 if (result < 0) 1008 goto fail_wiphy_register; 1009 1010 /* 1011 * We use the number of queues for feature tests (QoS, HT) internally 1012 * so restrict them appropriately. 1013 */ 1014 if (hw->queues > IEEE80211_MAX_QUEUES) 1015 hw->queues = IEEE80211_MAX_QUEUES; 1016 1017 local->workqueue = 1018 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1019 if (!local->workqueue) { 1020 result = -ENOMEM; 1021 goto fail_workqueue; 1022 } 1023 1024 /* 1025 * The hardware needs headroom for sending the frame, 1026 * and we need some headroom for passing the frame to monitor 1027 * interfaces, but never both at the same time. 1028 */ 1029 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1030 IEEE80211_TX_STATUS_HEADROOM); 1031 1032 debugfs_hw_add(local); 1033 1034 /* 1035 * if the driver doesn't specify a max listen interval we 1036 * use 5 which should be a safe default 1037 */ 1038 if (local->hw.max_listen_interval == 0) 1039 local->hw.max_listen_interval = 5; 1040 1041 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1042 1043 local->dynamic_ps_forced_timeout = -1; 1044 1045 if (!local->hw.txq_ac_max_pending) 1046 local->hw.txq_ac_max_pending = 64; 1047 1048 result = ieee80211_wep_init(local); 1049 if (result < 0) 1050 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1051 result); 1052 1053 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1054 1055 ieee80211_led_init(local); 1056 1057 rtnl_lock(); 1058 1059 result = ieee80211_init_rate_ctrl_alg(local, 1060 hw->rate_control_algorithm); 1061 if (result < 0) { 1062 wiphy_debug(local->hw.wiphy, 1063 "Failed to initialize rate control algorithm\n"); 1064 goto fail_rate; 1065 } 1066 1067 /* add one default STA interface if supported */ 1068 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1069 !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) { 1070 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1071 NL80211_IFTYPE_STATION, NULL); 1072 if (result) 1073 wiphy_warn(local->hw.wiphy, 1074 "Failed to add default virtual iface\n"); 1075 } 1076 1077 rtnl_unlock(); 1078 1079 local->network_latency_notifier.notifier_call = 1080 ieee80211_max_network_latency; 1081 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1082 &local->network_latency_notifier); 1083 if (result) 1084 goto fail_pm_qos; 1085 1086#ifdef CONFIG_INET 1087 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1088 result = register_inetaddr_notifier(&local->ifa_notifier); 1089 if (result) 1090 goto fail_ifa; 1091#endif 1092 1093#if IS_ENABLED(CONFIG_IPV6) 1094 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1095 result = register_inet6addr_notifier(&local->ifa6_notifier); 1096 if (result) 1097 goto fail_ifa6; 1098#endif 1099 1100 return 0; 1101 1102#if IS_ENABLED(CONFIG_IPV6) 1103 fail_ifa6: 1104#ifdef CONFIG_INET 1105 unregister_inetaddr_notifier(&local->ifa_notifier); 1106#endif 1107#endif 1108#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1109 fail_ifa: 1110 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1111 &local->network_latency_notifier); 1112#endif 1113 fail_pm_qos: 1114 rtnl_lock(); 1115 rate_control_deinitialize(local); 1116 ieee80211_remove_interfaces(local); 1117 fail_rate: 1118 rtnl_unlock(); 1119 ieee80211_led_exit(local); 1120 ieee80211_wep_free(local); 1121 destroy_workqueue(local->workqueue); 1122 fail_workqueue: 1123 wiphy_unregister(local->hw.wiphy); 1124 fail_wiphy_register: 1125 if (local->wiphy_ciphers_allocated) 1126 kfree(local->hw.wiphy->cipher_suites); 1127 kfree(local->int_scan_req); 1128 return result; 1129} 1130EXPORT_SYMBOL(ieee80211_register_hw); 1131 1132void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 1133 struct net_device *napi_dev, 1134 int (*poll)(struct napi_struct *, int), 1135 int weight) 1136{ 1137 struct ieee80211_local *local = hw_to_local(hw); 1138 1139 netif_napi_add(napi_dev, napi, poll, weight); 1140 local->napi = napi; 1141} 1142EXPORT_SYMBOL_GPL(ieee80211_napi_add); 1143 1144void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1145{ 1146 struct ieee80211_local *local = hw_to_local(hw); 1147 1148 tasklet_kill(&local->tx_pending_tasklet); 1149 tasklet_kill(&local->tasklet); 1150 1151 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1152 &local->network_latency_notifier); 1153#ifdef CONFIG_INET 1154 unregister_inetaddr_notifier(&local->ifa_notifier); 1155#endif 1156#if IS_ENABLED(CONFIG_IPV6) 1157 unregister_inet6addr_notifier(&local->ifa6_notifier); 1158#endif 1159 1160 rtnl_lock(); 1161 1162 /* 1163 * At this point, interface list manipulations are fine 1164 * because the driver cannot be handing us frames any 1165 * more and the tasklet is killed. 1166 */ 1167 ieee80211_remove_interfaces(local); 1168 1169 rtnl_unlock(); 1170 1171 cancel_work_sync(&local->restart_work); 1172 cancel_work_sync(&local->reconfig_filter); 1173 flush_work(&local->sched_scan_stopped_work); 1174 1175 ieee80211_clear_tx_pending(local); 1176 rate_control_deinitialize(local); 1177 1178 if (skb_queue_len(&local->skb_queue) || 1179 skb_queue_len(&local->skb_queue_unreliable)) 1180 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1181 skb_queue_purge(&local->skb_queue); 1182 skb_queue_purge(&local->skb_queue_unreliable); 1183 1184 destroy_workqueue(local->workqueue); 1185 wiphy_unregister(local->hw.wiphy); 1186 ieee80211_wep_free(local); 1187 ieee80211_led_exit(local); 1188 kfree(local->int_scan_req); 1189} 1190EXPORT_SYMBOL(ieee80211_unregister_hw); 1191 1192static int ieee80211_free_ack_frame(int id, void *p, void *data) 1193{ 1194 WARN_ONCE(1, "Have pending ack frames!\n"); 1195 kfree_skb(p); 1196 return 0; 1197} 1198 1199void ieee80211_free_hw(struct ieee80211_hw *hw) 1200{ 1201 struct ieee80211_local *local = hw_to_local(hw); 1202 1203 mutex_destroy(&local->iflist_mtx); 1204 mutex_destroy(&local->mtx); 1205 1206 if (local->wiphy_ciphers_allocated) 1207 kfree(local->hw.wiphy->cipher_suites); 1208 1209 idr_for_each(&local->ack_status_frames, 1210 ieee80211_free_ack_frame, NULL); 1211 idr_destroy(&local->ack_status_frames); 1212 1213 sta_info_stop(local); 1214 1215 wiphy_free(local->hw.wiphy); 1216} 1217EXPORT_SYMBOL(ieee80211_free_hw); 1218 1219static int __init ieee80211_init(void) 1220{ 1221 struct sk_buff *skb; 1222 int ret; 1223 1224 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1225 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1226 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1227 1228 ret = rc80211_minstrel_init(); 1229 if (ret) 1230 return ret; 1231 1232 ret = rc80211_minstrel_ht_init(); 1233 if (ret) 1234 goto err_minstrel; 1235 1236 ret = ieee80211_iface_init(); 1237 if (ret) 1238 goto err_netdev; 1239 1240 return 0; 1241 err_netdev: 1242 rc80211_minstrel_ht_exit(); 1243 err_minstrel: 1244 rc80211_minstrel_exit(); 1245 1246 return ret; 1247} 1248 1249static void __exit ieee80211_exit(void) 1250{ 1251 rc80211_minstrel_ht_exit(); 1252 rc80211_minstrel_exit(); 1253 1254 ieee80211s_stop(); 1255 1256 ieee80211_iface_exit(); 1257 1258 rcu_barrier(); 1259} 1260 1261 1262subsys_initcall(ieee80211_init); 1263module_exit(ieee80211_exit); 1264 1265MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1266MODULE_LICENSE("GPL"); 1267