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 38 void ieee80211_configure_filter(struct ieee80211_local *local) 39 { 40 u64 mc; 41 unsigned int changed_flags; 42 unsigned int new_flags = 0; 43 44 if (atomic_read(&local->iff_promiscs)) 45 new_flags |= FIF_PROMISC_IN_BSS; 46 47 if (atomic_read(&local->iff_allmultis)) 48 new_flags |= FIF_ALLMULTI; 49 50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 51 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 88 static 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 96 static 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 } 165 166 int 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 } 199 200 void 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 } 210 211 u32 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 } 220 221 static 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 } 247 248 static void ieee80211_restart_work(struct work_struct *work) 249 { 250 struct ieee80211_local *local = 251 container_of(work, struct ieee80211_local, restart_work); 252 253 /* wait for scan work complete */ 254 flush_workqueue(local->workqueue); 255 256 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 257 "%s called with hardware scan in progress\n", __func__); 258 259 rtnl_lock(); 260 ieee80211_scan_cancel(local); 261 ieee80211_reconfig(local); 262 rtnl_unlock(); 263 } 264 265 void ieee80211_restart_hw(struct ieee80211_hw *hw) 266 { 267 struct ieee80211_local *local = hw_to_local(hw); 268 269 trace_api_restart_hw(local); 270 271 wiphy_info(hw->wiphy, 272 "Hardware restart was requested\n"); 273 274 /* use this reason, ieee80211_reconfig will unblock it */ 275 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 276 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 277 false); 278 279 /* 280 * Stop all Rx during the reconfig. We don't want state changes 281 * or driver callbacks while this is in progress. 282 */ 283 local->in_reconfig = true; 284 barrier(); 285 286 schedule_work(&local->restart_work); 287 } 288 EXPORT_SYMBOL(ieee80211_restart_hw); 289 290 #ifdef CONFIG_INET 291 static int ieee80211_ifa_changed(struct notifier_block *nb, 292 unsigned long data, void *arg) 293 { 294 struct in_ifaddr *ifa = arg; 295 struct ieee80211_local *local = 296 container_of(nb, struct ieee80211_local, 297 ifa_notifier); 298 struct net_device *ndev = ifa->ifa_dev->dev; 299 struct wireless_dev *wdev = ndev->ieee80211_ptr; 300 struct in_device *idev; 301 struct ieee80211_sub_if_data *sdata; 302 struct ieee80211_bss_conf *bss_conf; 303 struct ieee80211_if_managed *ifmgd; 304 int c = 0; 305 306 /* Make sure it's our interface that got changed */ 307 if (!wdev) 308 return NOTIFY_DONE; 309 310 if (wdev->wiphy != local->hw.wiphy) 311 return NOTIFY_DONE; 312 313 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 314 bss_conf = &sdata->vif.bss_conf; 315 316 /* ARP filtering is only supported in managed mode */ 317 if (sdata->vif.type != NL80211_IFTYPE_STATION) 318 return NOTIFY_DONE; 319 320 idev = __in_dev_get_rtnl(sdata->dev); 321 if (!idev) 322 return NOTIFY_DONE; 323 324 ifmgd = &sdata->u.mgd; 325 sdata_lock(sdata); 326 327 /* Copy the addresses to the bss_conf list */ 328 ifa = idev->ifa_list; 329 while (ifa) { 330 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 331 bss_conf->arp_addr_list[c] = ifa->ifa_address; 332 ifa = ifa->ifa_next; 333 c++; 334 } 335 336 bss_conf->arp_addr_cnt = c; 337 338 /* Configure driver only if associated (which also implies it is up) */ 339 if (ifmgd->associated) 340 ieee80211_bss_info_change_notify(sdata, 341 BSS_CHANGED_ARP_FILTER); 342 343 sdata_unlock(sdata); 344 345 return NOTIFY_OK; 346 } 347 #endif 348 349 #if IS_ENABLED(CONFIG_IPV6) 350 static int ieee80211_ifa6_changed(struct notifier_block *nb, 351 unsigned long data, void *arg) 352 { 353 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 354 struct inet6_dev *idev = ifa->idev; 355 struct net_device *ndev = ifa->idev->dev; 356 struct ieee80211_local *local = 357 container_of(nb, struct ieee80211_local, ifa6_notifier); 358 struct wireless_dev *wdev = ndev->ieee80211_ptr; 359 struct ieee80211_sub_if_data *sdata; 360 361 /* Make sure it's our interface that got changed */ 362 if (!wdev || wdev->wiphy != local->hw.wiphy) 363 return NOTIFY_DONE; 364 365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 366 367 /* 368 * For now only support station mode. This is mostly because 369 * doing AP would have to handle AP_VLAN in some way ... 370 */ 371 if (sdata->vif.type != NL80211_IFTYPE_STATION) 372 return NOTIFY_DONE; 373 374 drv_ipv6_addr_change(local, sdata, idev); 375 376 return NOTIFY_OK; 377 } 378 #endif 379 380 /* There isn't a lot of sense in it, but you can transmit anything you like */ 381 static const struct ieee80211_txrx_stypes 382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 383 [NL80211_IFTYPE_ADHOC] = { 384 .tx = 0xffff, 385 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 386 BIT(IEEE80211_STYPE_AUTH >> 4) | 387 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 388 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 389 }, 390 [NL80211_IFTYPE_STATION] = { 391 .tx = 0xffff, 392 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 394 }, 395 [NL80211_IFTYPE_AP] = { 396 .tx = 0xffff, 397 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 398 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 399 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 400 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 401 BIT(IEEE80211_STYPE_AUTH >> 4) | 402 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 403 BIT(IEEE80211_STYPE_ACTION >> 4), 404 }, 405 [NL80211_IFTYPE_AP_VLAN] = { 406 /* copy AP */ 407 .tx = 0xffff, 408 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 409 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 411 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 412 BIT(IEEE80211_STYPE_AUTH >> 4) | 413 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 414 BIT(IEEE80211_STYPE_ACTION >> 4), 415 }, 416 [NL80211_IFTYPE_P2P_CLIENT] = { 417 .tx = 0xffff, 418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 420 }, 421 [NL80211_IFTYPE_P2P_GO] = { 422 .tx = 0xffff, 423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 426 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 427 BIT(IEEE80211_STYPE_AUTH >> 4) | 428 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 429 BIT(IEEE80211_STYPE_ACTION >> 4), 430 }, 431 [NL80211_IFTYPE_MESH_POINT] = { 432 .tx = 0xffff, 433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 434 BIT(IEEE80211_STYPE_AUTH >> 4) | 435 BIT(IEEE80211_STYPE_DEAUTH >> 4), 436 }, 437 [NL80211_IFTYPE_P2P_DEVICE] = { 438 .tx = 0xffff, 439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 441 }, 442 }; 443 444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 445 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 446 IEEE80211_HT_AMPDU_PARM_DENSITY, 447 448 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 449 IEEE80211_HT_CAP_MAX_AMSDU | 450 IEEE80211_HT_CAP_SGI_20 | 451 IEEE80211_HT_CAP_SGI_40 | 452 IEEE80211_HT_CAP_LDPC_CODING | 453 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 454 .mcs = { 455 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 456 0xff, 0xff, 0xff, 0xff, 0xff, }, 457 }, 458 }; 459 460 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 461 .vht_cap_info = 462 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 463 IEEE80211_VHT_CAP_SHORT_GI_80 | 464 IEEE80211_VHT_CAP_SHORT_GI_160 | 465 IEEE80211_VHT_CAP_RXSTBC_1 | 466 IEEE80211_VHT_CAP_RXSTBC_2 | 467 IEEE80211_VHT_CAP_RXSTBC_3 | 468 IEEE80211_VHT_CAP_RXSTBC_4 | 469 IEEE80211_VHT_CAP_TXSTBC | 470 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 471 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 472 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 473 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 474 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 475 .supp_mcs = { 476 .rx_mcs_map = cpu_to_le16(~0), 477 .tx_mcs_map = cpu_to_le16(~0), 478 }, 479 }; 480 481 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 482 const struct ieee80211_ops *ops, 483 const char *requested_name) 484 { 485 struct ieee80211_local *local; 486 int priv_size, i; 487 struct wiphy *wiphy; 488 bool use_chanctx; 489 490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 491 !ops->add_interface || !ops->remove_interface || 492 !ops->configure_filter)) 493 return NULL; 494 495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 496 return NULL; 497 498 /* check all or no channel context operations exist */ 499 i = !!ops->add_chanctx + !!ops->remove_chanctx + 500 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 501 !!ops->unassign_vif_chanctx; 502 if (WARN_ON(i != 0 && i != 5)) 503 return NULL; 504 use_chanctx = i == 5; 505 506 /* Ensure 32-byte alignment of our private data and hw private data. 507 * We use the wiphy priv data for both our ieee80211_local and for 508 * the driver's private data 509 * 510 * In memory it'll be like this: 511 * 512 * +-------------------------+ 513 * | struct wiphy | 514 * +-------------------------+ 515 * | struct ieee80211_local | 516 * +-------------------------+ 517 * | driver's private data | 518 * +-------------------------+ 519 * 520 */ 521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 522 523 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 524 525 if (!wiphy) 526 return NULL; 527 528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 529 530 wiphy->privid = mac80211_wiphy_privid; 531 532 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 533 WIPHY_FLAG_4ADDR_AP | 534 WIPHY_FLAG_4ADDR_STATION | 535 WIPHY_FLAG_REPORTS_OBSS | 536 WIPHY_FLAG_OFFCHAN_TX; 537 538 if (ops->remain_on_channel) 539 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 540 541 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 542 NL80211_FEATURE_SAE | 543 NL80211_FEATURE_HT_IBSS | 544 NL80211_FEATURE_VIF_TXPOWER | 545 NL80211_FEATURE_MAC_ON_CREATE | 546 NL80211_FEATURE_USERSPACE_MPM; 547 548 if (!ops->hw_scan) 549 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 550 NL80211_FEATURE_AP_SCAN; 551 552 553 if (!ops->set_key) 554 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 555 556 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 557 558 local = wiphy_priv(wiphy); 559 560 local->hw.wiphy = wiphy; 561 562 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 563 564 local->ops = ops; 565 local->use_chanctx = use_chanctx; 566 567 /* set up some defaults */ 568 local->hw.queues = 1; 569 local->hw.max_rates = 1; 570 local->hw.max_report_rates = 0; 571 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 572 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 573 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 574 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 575 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 576 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 577 IEEE80211_RADIOTAP_MCS_HAVE_GI | 578 IEEE80211_RADIOTAP_MCS_HAVE_BW; 579 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 580 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 581 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 582 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 583 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 584 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 585 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 586 587 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 588 589 wiphy->extended_capabilities = local->ext_capa; 590 wiphy->extended_capabilities_mask = local->ext_capa; 591 wiphy->extended_capabilities_len = 592 ARRAY_SIZE(local->ext_capa); 593 594 INIT_LIST_HEAD(&local->interfaces); 595 596 __hw_addr_init(&local->mc_list); 597 598 mutex_init(&local->iflist_mtx); 599 mutex_init(&local->mtx); 600 601 mutex_init(&local->key_mtx); 602 spin_lock_init(&local->filter_lock); 603 spin_lock_init(&local->rx_path_lock); 604 spin_lock_init(&local->queue_stop_reason_lock); 605 606 INIT_LIST_HEAD(&local->chanctx_list); 607 mutex_init(&local->chanctx_mtx); 608 609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 610 611 INIT_WORK(&local->restart_work, ieee80211_restart_work); 612 613 INIT_WORK(&local->radar_detected_work, 614 ieee80211_dfs_radar_detected_work); 615 616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 617 local->smps_mode = IEEE80211_SMPS_OFF; 618 619 INIT_WORK(&local->dynamic_ps_enable_work, 620 ieee80211_dynamic_ps_enable_work); 621 INIT_WORK(&local->dynamic_ps_disable_work, 622 ieee80211_dynamic_ps_disable_work); 623 setup_timer(&local->dynamic_ps_timer, 624 ieee80211_dynamic_ps_timer, (unsigned long) local); 625 626 INIT_WORK(&local->sched_scan_stopped_work, 627 ieee80211_sched_scan_stopped_work); 628 629 spin_lock_init(&local->ack_status_lock); 630 idr_init(&local->ack_status_frames); 631 632 sta_info_init(local); 633 634 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 635 skb_queue_head_init(&local->pending[i]); 636 atomic_set(&local->agg_queue_stop[i], 0); 637 } 638 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 639 (unsigned long)local); 640 641 tasklet_init(&local->tasklet, 642 ieee80211_tasklet_handler, 643 (unsigned long) local); 644 645 skb_queue_head_init(&local->skb_queue); 646 skb_queue_head_init(&local->skb_queue_unreliable); 647 648 ieee80211_led_names(local); 649 650 ieee80211_roc_setup(local); 651 652 return &local->hw; 653 } 654 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 655 656 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 657 { 658 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 659 IS_ERR(local->wep_rx_tfm)); 660 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE; 661 int n_suites = 0, r = 0, w = 0; 662 u32 *suites; 663 static const u32 cipher_suites[] = { 664 /* keep WEP first, it may be removed below */ 665 WLAN_CIPHER_SUITE_WEP40, 666 WLAN_CIPHER_SUITE_WEP104, 667 WLAN_CIPHER_SUITE_TKIP, 668 WLAN_CIPHER_SUITE_CCMP, 669 WLAN_CIPHER_SUITE_CCMP_256, 670 WLAN_CIPHER_SUITE_GCMP, 671 WLAN_CIPHER_SUITE_GCMP_256, 672 673 /* keep last -- depends on hw flags! */ 674 WLAN_CIPHER_SUITE_AES_CMAC, 675 WLAN_CIPHER_SUITE_BIP_CMAC_256, 676 WLAN_CIPHER_SUITE_BIP_GMAC_128, 677 WLAN_CIPHER_SUITE_BIP_GMAC_256, 678 }; 679 680 if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL || 681 local->hw.wiphy->cipher_suites) { 682 /* If the driver advertises, or doesn't support SW crypto, 683 * we only need to remove WEP if necessary. 684 */ 685 if (have_wep) 686 return 0; 687 688 /* well if it has _no_ ciphers ... fine */ 689 if (!local->hw.wiphy->n_cipher_suites) 690 return 0; 691 692 /* Driver provides cipher suites, but we need to exclude WEP */ 693 suites = kmemdup(local->hw.wiphy->cipher_suites, 694 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 695 GFP_KERNEL); 696 if (!suites) 697 return -ENOMEM; 698 699 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 700 u32 suite = local->hw.wiphy->cipher_suites[r]; 701 702 if (suite == WLAN_CIPHER_SUITE_WEP40 || 703 suite == WLAN_CIPHER_SUITE_WEP104) 704 continue; 705 suites[w++] = suite; 706 } 707 } else if (!local->hw.cipher_schemes) { 708 /* If the driver doesn't have cipher schemes, there's nothing 709 * else to do other than assign the (software supported and 710 * perhaps offloaded) cipher suites. 711 */ 712 local->hw.wiphy->cipher_suites = cipher_suites; 713 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 714 715 if (!have_mfp) 716 local->hw.wiphy->n_cipher_suites -= 4; 717 718 if (!have_wep) { 719 local->hw.wiphy->cipher_suites += 2; 720 local->hw.wiphy->n_cipher_suites -= 2; 721 } 722 723 /* not dynamically allocated, so just return */ 724 return 0; 725 } else { 726 const struct ieee80211_cipher_scheme *cs; 727 728 cs = local->hw.cipher_schemes; 729 730 /* Driver specifies cipher schemes only (but not cipher suites 731 * including the schemes) 732 * 733 * We start counting ciphers defined by schemes, TKIP, CCMP, 734 * CCMP-256, GCMP, and GCMP-256 735 */ 736 n_suites = local->hw.n_cipher_schemes + 5; 737 738 /* check if we have WEP40 and WEP104 */ 739 if (have_wep) 740 n_suites += 2; 741 742 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 743 * BIP-GMAC-256 744 */ 745 if (have_mfp) 746 n_suites += 4; 747 748 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 749 if (!suites) 750 return -ENOMEM; 751 752 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 753 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 754 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 755 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 756 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 757 758 if (have_wep) { 759 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 760 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 761 } 762 763 if (have_mfp) { 764 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 765 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 766 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 767 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 768 } 769 770 for (r = 0; r < local->hw.n_cipher_schemes; r++) 771 suites[w++] = cs[r].cipher; 772 } 773 774 local->hw.wiphy->cipher_suites = suites; 775 local->hw.wiphy->n_cipher_suites = w; 776 local->wiphy_ciphers_allocated = true; 777 778 return 0; 779 } 780 781 int ieee80211_register_hw(struct ieee80211_hw *hw) 782 { 783 struct ieee80211_local *local = hw_to_local(hw); 784 int result, i; 785 enum ieee80211_band band; 786 int channels, max_bitrates; 787 bool supp_ht, supp_vht; 788 netdev_features_t feature_whitelist; 789 struct cfg80211_chan_def dflt_chandef = {}; 790 791 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 792 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 793 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 794 return -EINVAL; 795 796 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 797 (!local->ops->tdls_channel_switch || 798 !local->ops->tdls_cancel_channel_switch || 799 !local->ops->tdls_recv_channel_switch)) 800 return -EOPNOTSUPP; 801 802 #ifdef CONFIG_PM 803 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 804 return -EINVAL; 805 #endif 806 807 if (!local->use_chanctx) { 808 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 809 const struct ieee80211_iface_combination *comb; 810 811 comb = &local->hw.wiphy->iface_combinations[i]; 812 813 if (comb->num_different_channels > 1) 814 return -EINVAL; 815 } 816 } else { 817 /* 818 * WDS is currently prohibited when channel contexts are used 819 * because there's no clear definition of which channel WDS 820 * type interfaces use 821 */ 822 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 823 return -EINVAL; 824 825 /* DFS is not supported with multi-channel combinations yet */ 826 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 827 const struct ieee80211_iface_combination *comb; 828 829 comb = &local->hw.wiphy->iface_combinations[i]; 830 831 if (comb->radar_detect_widths && 832 comb->num_different_channels > 1) 833 return -EINVAL; 834 } 835 } 836 837 /* Only HW csum features are currently compatible with mac80211 */ 838 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 839 NETIF_F_HW_CSUM; 840 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 841 return -EINVAL; 842 843 if (hw->max_report_rates == 0) 844 hw->max_report_rates = hw->max_rates; 845 846 local->rx_chains = 1; 847 848 /* 849 * generic code guarantees at least one band, 850 * set this very early because much code assumes 851 * that hw.conf.channel is assigned 852 */ 853 channels = 0; 854 max_bitrates = 0; 855 supp_ht = false; 856 supp_vht = false; 857 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 858 struct ieee80211_supported_band *sband; 859 860 sband = local->hw.wiphy->bands[band]; 861 if (!sband) 862 continue; 863 864 if (!dflt_chandef.chan) { 865 cfg80211_chandef_create(&dflt_chandef, 866 &sband->channels[0], 867 NL80211_CHAN_NO_HT); 868 /* init channel we're on */ 869 if (!local->use_chanctx && !local->_oper_chandef.chan) { 870 local->hw.conf.chandef = dflt_chandef; 871 local->_oper_chandef = dflt_chandef; 872 } 873 local->monitor_chandef = dflt_chandef; 874 } 875 876 channels += sband->n_channels; 877 878 if (max_bitrates < sband->n_bitrates) 879 max_bitrates = sband->n_bitrates; 880 supp_ht = supp_ht || sband->ht_cap.ht_supported; 881 supp_vht = supp_vht || sband->vht_cap.vht_supported; 882 883 if (sband->ht_cap.ht_supported) 884 local->rx_chains = 885 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 886 local->rx_chains); 887 888 /* TODO: consider VHT for RX chains, hopefully it's the same */ 889 } 890 891 /* if low-level driver supports AP, we also support VLAN */ 892 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 893 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 894 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 895 } 896 897 /* mac80211 always supports monitor */ 898 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 899 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 900 901 /* mac80211 doesn't support more than one IBSS interface right now */ 902 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 903 const struct ieee80211_iface_combination *c; 904 int j; 905 906 c = &hw->wiphy->iface_combinations[i]; 907 908 for (j = 0; j < c->n_limits; j++) 909 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 910 c->limits[j].max > 1) 911 return -EINVAL; 912 } 913 914 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 915 sizeof(void *) * channels, GFP_KERNEL); 916 if (!local->int_scan_req) 917 return -ENOMEM; 918 919 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 920 if (!local->hw.wiphy->bands[band]) 921 continue; 922 local->int_scan_req->rates[band] = (u32) -1; 923 } 924 925 #ifndef CONFIG_MAC80211_MESH 926 /* mesh depends on Kconfig, but drivers should set it if they want */ 927 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 928 #endif 929 930 /* if the underlying driver supports mesh, mac80211 will (at least) 931 * provide routing of mesh authentication frames to userspace */ 932 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 933 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 934 935 /* mac80211 supports control port protocol changing */ 936 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 937 938 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { 939 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 940 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { 941 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 942 if (hw->max_signal <= 0) { 943 result = -EINVAL; 944 goto fail_wiphy_register; 945 } 946 } 947 948 /* 949 * Calculate scan IE length -- we need this to alloc 950 * memory and to subtract from the driver limit. It 951 * includes the DS Params, (extended) supported rates, and HT 952 * information -- SSID is the driver's responsibility. 953 */ 954 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 955 3 /* DS Params */; 956 if (supp_ht) 957 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 958 959 if (supp_vht) 960 local->scan_ies_len += 961 2 + sizeof(struct ieee80211_vht_cap); 962 963 if (!local->ops->hw_scan) { 964 /* For hw_scan, driver needs to set these up. */ 965 local->hw.wiphy->max_scan_ssids = 4; 966 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 967 } 968 969 /* 970 * If the driver supports any scan IEs, then assume the 971 * limit includes the IEs mac80211 will add, otherwise 972 * leave it at zero and let the driver sort it out; we 973 * still pass our IEs to the driver but userspace will 974 * not be allowed to in that case. 975 */ 976 if (local->hw.wiphy->max_scan_ie_len) 977 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 978 979 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 980 local->hw.n_cipher_schemes)); 981 982 result = ieee80211_init_cipher_suites(local); 983 if (result < 0) 984 goto fail_wiphy_register; 985 986 if (!local->ops->remain_on_channel) 987 local->hw.wiphy->max_remain_on_channel_duration = 5000; 988 989 /* mac80211 based drivers don't support internal TDLS setup */ 990 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 991 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 992 993 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 994 if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA) 995 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 996 997 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 998 999 result = wiphy_register(local->hw.wiphy); 1000 if (result < 0) 1001 goto fail_wiphy_register; 1002 1003 /* 1004 * We use the number of queues for feature tests (QoS, HT) internally 1005 * so restrict them appropriately. 1006 */ 1007 if (hw->queues > IEEE80211_MAX_QUEUES) 1008 hw->queues = IEEE80211_MAX_QUEUES; 1009 1010 local->workqueue = 1011 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1012 if (!local->workqueue) { 1013 result = -ENOMEM; 1014 goto fail_workqueue; 1015 } 1016 1017 /* 1018 * The hardware needs headroom for sending the frame, 1019 * and we need some headroom for passing the frame to monitor 1020 * interfaces, but never both at the same time. 1021 */ 1022 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1023 IEEE80211_TX_STATUS_HEADROOM); 1024 1025 debugfs_hw_add(local); 1026 1027 /* 1028 * if the driver doesn't specify a max listen interval we 1029 * use 5 which should be a safe default 1030 */ 1031 if (local->hw.max_listen_interval == 0) 1032 local->hw.max_listen_interval = 5; 1033 1034 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1035 1036 local->dynamic_ps_forced_timeout = -1; 1037 1038 result = ieee80211_wep_init(local); 1039 if (result < 0) 1040 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1041 result); 1042 1043 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1044 1045 ieee80211_led_init(local); 1046 1047 rtnl_lock(); 1048 1049 result = ieee80211_init_rate_ctrl_alg(local, 1050 hw->rate_control_algorithm); 1051 if (result < 0) { 1052 wiphy_debug(local->hw.wiphy, 1053 "Failed to initialize rate control algorithm\n"); 1054 goto fail_rate; 1055 } 1056 1057 /* add one default STA interface if supported */ 1058 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1059 !(hw->flags & IEEE80211_HW_NO_AUTO_VIF)) { 1060 result = ieee80211_if_add(local, "wlan%d", NULL, 1061 NL80211_IFTYPE_STATION, NULL); 1062 if (result) 1063 wiphy_warn(local->hw.wiphy, 1064 "Failed to add default virtual iface\n"); 1065 } 1066 1067 rtnl_unlock(); 1068 1069 local->network_latency_notifier.notifier_call = 1070 ieee80211_max_network_latency; 1071 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1072 &local->network_latency_notifier); 1073 if (result) 1074 goto fail_pm_qos; 1075 1076 #ifdef CONFIG_INET 1077 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1078 result = register_inetaddr_notifier(&local->ifa_notifier); 1079 if (result) 1080 goto fail_ifa; 1081 #endif 1082 1083 #if IS_ENABLED(CONFIG_IPV6) 1084 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1085 result = register_inet6addr_notifier(&local->ifa6_notifier); 1086 if (result) 1087 goto fail_ifa6; 1088 #endif 1089 1090 return 0; 1091 1092 #if IS_ENABLED(CONFIG_IPV6) 1093 fail_ifa6: 1094 #ifdef CONFIG_INET 1095 unregister_inetaddr_notifier(&local->ifa_notifier); 1096 #endif 1097 #endif 1098 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1099 fail_ifa: 1100 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1101 &local->network_latency_notifier); 1102 #endif 1103 fail_pm_qos: 1104 rtnl_lock(); 1105 rate_control_deinitialize(local); 1106 ieee80211_remove_interfaces(local); 1107 fail_rate: 1108 rtnl_unlock(); 1109 ieee80211_led_exit(local); 1110 ieee80211_wep_free(local); 1111 destroy_workqueue(local->workqueue); 1112 fail_workqueue: 1113 wiphy_unregister(local->hw.wiphy); 1114 fail_wiphy_register: 1115 if (local->wiphy_ciphers_allocated) 1116 kfree(local->hw.wiphy->cipher_suites); 1117 kfree(local->int_scan_req); 1118 return result; 1119 } 1120 EXPORT_SYMBOL(ieee80211_register_hw); 1121 1122 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 1123 struct net_device *napi_dev, 1124 int (*poll)(struct napi_struct *, int), 1125 int weight) 1126 { 1127 struct ieee80211_local *local = hw_to_local(hw); 1128 1129 netif_napi_add(napi_dev, napi, poll, weight); 1130 local->napi = napi; 1131 } 1132 EXPORT_SYMBOL_GPL(ieee80211_napi_add); 1133 1134 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1135 { 1136 struct ieee80211_local *local = hw_to_local(hw); 1137 1138 tasklet_kill(&local->tx_pending_tasklet); 1139 tasklet_kill(&local->tasklet); 1140 1141 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1142 &local->network_latency_notifier); 1143 #ifdef CONFIG_INET 1144 unregister_inetaddr_notifier(&local->ifa_notifier); 1145 #endif 1146 #if IS_ENABLED(CONFIG_IPV6) 1147 unregister_inet6addr_notifier(&local->ifa6_notifier); 1148 #endif 1149 1150 rtnl_lock(); 1151 1152 /* 1153 * At this point, interface list manipulations are fine 1154 * because the driver cannot be handing us frames any 1155 * more and the tasklet is killed. 1156 */ 1157 ieee80211_remove_interfaces(local); 1158 1159 rtnl_unlock(); 1160 1161 cancel_work_sync(&local->restart_work); 1162 cancel_work_sync(&local->reconfig_filter); 1163 flush_work(&local->sched_scan_stopped_work); 1164 1165 ieee80211_clear_tx_pending(local); 1166 rate_control_deinitialize(local); 1167 1168 if (skb_queue_len(&local->skb_queue) || 1169 skb_queue_len(&local->skb_queue_unreliable)) 1170 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1171 skb_queue_purge(&local->skb_queue); 1172 skb_queue_purge(&local->skb_queue_unreliable); 1173 1174 destroy_workqueue(local->workqueue); 1175 wiphy_unregister(local->hw.wiphy); 1176 sta_info_stop(local); 1177 ieee80211_wep_free(local); 1178 ieee80211_led_exit(local); 1179 kfree(local->int_scan_req); 1180 } 1181 EXPORT_SYMBOL(ieee80211_unregister_hw); 1182 1183 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1184 { 1185 WARN_ONCE(1, "Have pending ack frames!\n"); 1186 kfree_skb(p); 1187 return 0; 1188 } 1189 1190 void ieee80211_free_hw(struct ieee80211_hw *hw) 1191 { 1192 struct ieee80211_local *local = hw_to_local(hw); 1193 1194 mutex_destroy(&local->iflist_mtx); 1195 mutex_destroy(&local->mtx); 1196 1197 if (local->wiphy_ciphers_allocated) 1198 kfree(local->hw.wiphy->cipher_suites); 1199 1200 idr_for_each(&local->ack_status_frames, 1201 ieee80211_free_ack_frame, NULL); 1202 idr_destroy(&local->ack_status_frames); 1203 1204 kfree(rcu_access_pointer(local->tx_latency)); 1205 1206 sta_info_stop(local); 1207 1208 wiphy_free(local->hw.wiphy); 1209 } 1210 EXPORT_SYMBOL(ieee80211_free_hw); 1211 1212 static int __init ieee80211_init(void) 1213 { 1214 struct sk_buff *skb; 1215 int ret; 1216 1217 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1218 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1219 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1220 1221 ret = rc80211_minstrel_init(); 1222 if (ret) 1223 return ret; 1224 1225 ret = rc80211_minstrel_ht_init(); 1226 if (ret) 1227 goto err_minstrel; 1228 1229 ret = ieee80211_iface_init(); 1230 if (ret) 1231 goto err_netdev; 1232 1233 return 0; 1234 err_netdev: 1235 rc80211_minstrel_ht_exit(); 1236 err_minstrel: 1237 rc80211_minstrel_exit(); 1238 1239 return ret; 1240 } 1241 1242 static void __exit ieee80211_exit(void) 1243 { 1244 rc80211_minstrel_ht_exit(); 1245 rc80211_minstrel_exit(); 1246 1247 ieee80211s_stop(); 1248 1249 ieee80211_iface_exit(); 1250 1251 rcu_barrier(); 1252 } 1253 1254 1255 subsys_initcall(ieee80211_init); 1256 module_exit(ieee80211_exit); 1257 1258 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1259 MODULE_LICENSE("GPL"); 1260