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/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 spin_lock_bh(&local->filter_lock); 68 changed_flags = local->filter_flags ^ new_flags; 69 70 mc = drv_prepare_multicast(local, &local->mc_list); 71 spin_unlock_bh(&local->filter_lock); 72 73 /* be a bit nasty */ 74 new_flags |= (1<<31); 75 76 drv_configure_filter(local, changed_flags, &new_flags, mc); 77 78 WARN_ON(new_flags & (1<<31)); 79 80 local->filter_flags = new_flags & ~(1<<31); 81 } 82 83 static void ieee80211_reconfig_filter(struct work_struct *work) 84 { 85 struct ieee80211_local *local = 86 container_of(work, struct ieee80211_local, reconfig_filter); 87 88 ieee80211_configure_filter(local); 89 } 90 91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 92 { 93 struct ieee80211_sub_if_data *sdata; 94 struct cfg80211_chan_def chandef = {}; 95 u32 changed = 0; 96 int power; 97 u32 offchannel_flag; 98 99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 100 101 if (local->scan_chandef.chan) { 102 chandef = local->scan_chandef; 103 } else if (local->tmp_channel) { 104 chandef.chan = local->tmp_channel; 105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 106 chandef.center_freq1 = chandef.chan->center_freq; 107 } else 108 chandef = local->_oper_chandef; 109 110 WARN(!cfg80211_chandef_valid(&chandef), 111 "control:%d MHz width:%d center: %d/%d MHz", 112 chandef.chan->center_freq, chandef.width, 113 chandef.center_freq1, chandef.center_freq2); 114 115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 117 else 118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 119 120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 121 122 if (offchannel_flag || 123 !cfg80211_chandef_identical(&local->hw.conf.chandef, 124 &local->_oper_chandef)) { 125 local->hw.conf.chandef = chandef; 126 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 127 } 128 129 if (!conf_is_ht(&local->hw.conf)) { 130 /* 131 * mac80211.h documents that this is only valid 132 * when the channel is set to an HT type, and 133 * that otherwise STATIC is used. 134 */ 135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 136 } else if (local->hw.conf.smps_mode != local->smps_mode) { 137 local->hw.conf.smps_mode = local->smps_mode; 138 changed |= IEEE80211_CONF_CHANGE_SMPS; 139 } 140 141 power = ieee80211_chandef_max_power(&chandef); 142 143 rcu_read_lock(); 144 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 145 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 146 continue; 147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 148 continue; 149 power = min(power, sdata->vif.bss_conf.txpower); 150 } 151 rcu_read_unlock(); 152 153 if (local->hw.conf.power_level != power) { 154 changed |= IEEE80211_CONF_CHANGE_POWER; 155 local->hw.conf.power_level = power; 156 } 157 158 return changed; 159 } 160 161 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 162 { 163 int ret = 0; 164 165 might_sleep(); 166 167 if (!local->use_chanctx) 168 changed |= ieee80211_hw_conf_chan(local); 169 else 170 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 171 IEEE80211_CONF_CHANGE_POWER); 172 173 if (changed && local->open_count) { 174 ret = drv_config(local, changed); 175 /* 176 * Goal: 177 * HW reconfiguration should never fail, the driver has told 178 * us what it can support so it should live up to that promise. 179 * 180 * Current status: 181 * rfkill is not integrated with mac80211 and a 182 * configuration command can thus fail if hardware rfkill 183 * is enabled 184 * 185 * FIXME: integrate rfkill with mac80211 and then add this 186 * WARN_ON() back 187 * 188 */ 189 /* WARN_ON(ret); */ 190 } 191 192 return ret; 193 } 194 195 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 196 u32 changed) 197 { 198 struct ieee80211_local *local = sdata->local; 199 200 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 201 return; 202 203 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 204 } 205 206 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 207 { 208 sdata->vif.bss_conf.use_cts_prot = false; 209 sdata->vif.bss_conf.use_short_preamble = false; 210 sdata->vif.bss_conf.use_short_slot = false; 211 return BSS_CHANGED_ERP_CTS_PROT | 212 BSS_CHANGED_ERP_PREAMBLE | 213 BSS_CHANGED_ERP_SLOT; 214 } 215 216 static void ieee80211_tasklet_handler(unsigned long data) 217 { 218 struct ieee80211_local *local = (struct ieee80211_local *) data; 219 struct sk_buff *skb; 220 221 while ((skb = skb_dequeue(&local->skb_queue)) || 222 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 223 switch (skb->pkt_type) { 224 case IEEE80211_RX_MSG: 225 /* Clear skb->pkt_type in order to not confuse kernel 226 * netstack. */ 227 skb->pkt_type = 0; 228 ieee80211_rx(&local->hw, skb); 229 break; 230 case IEEE80211_TX_STATUS_MSG: 231 skb->pkt_type = 0; 232 ieee80211_tx_status(&local->hw, skb); 233 break; 234 default: 235 WARN(1, "mac80211: Packet is of unknown type %d\n", 236 skb->pkt_type); 237 dev_kfree_skb(skb); 238 break; 239 } 240 } 241 } 242 243 static void ieee80211_restart_work(struct work_struct *work) 244 { 245 struct ieee80211_local *local = 246 container_of(work, struct ieee80211_local, restart_work); 247 struct ieee80211_sub_if_data *sdata; 248 249 /* wait for scan work complete */ 250 flush_workqueue(local->workqueue); 251 flush_work(&local->sched_scan_stopped_work); 252 253 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 254 "%s called with hardware scan in progress\n", __func__); 255 256 rtnl_lock(); 257 list_for_each_entry(sdata, &local->interfaces, list) 258 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 259 ieee80211_scan_cancel(local); 260 261 /* make sure any new ROC will consider local->in_reconfig */ 262 flush_delayed_work(&local->roc_work); 263 flush_work(&local->hw_roc_done); 264 265 ieee80211_reconfig(local); 266 rtnl_unlock(); 267 } 268 269 void ieee80211_restart_hw(struct ieee80211_hw *hw) 270 { 271 struct ieee80211_local *local = hw_to_local(hw); 272 273 trace_api_restart_hw(local); 274 275 wiphy_info(hw->wiphy, 276 "Hardware restart was requested\n"); 277 278 /* use this reason, ieee80211_reconfig will unblock it */ 279 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 280 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 281 false); 282 283 /* 284 * Stop all Rx during the reconfig. We don't want state changes 285 * or driver callbacks while this is in progress. 286 */ 287 local->in_reconfig = true; 288 barrier(); 289 290 queue_work(system_freezable_wq, &local->restart_work); 291 } 292 EXPORT_SYMBOL(ieee80211_restart_hw); 293 294 #ifdef CONFIG_INET 295 static int ieee80211_ifa_changed(struct notifier_block *nb, 296 unsigned long data, void *arg) 297 { 298 struct in_ifaddr *ifa = arg; 299 struct ieee80211_local *local = 300 container_of(nb, struct ieee80211_local, 301 ifa_notifier); 302 struct net_device *ndev = ifa->ifa_dev->dev; 303 struct wireless_dev *wdev = ndev->ieee80211_ptr; 304 struct in_device *idev; 305 struct ieee80211_sub_if_data *sdata; 306 struct ieee80211_bss_conf *bss_conf; 307 struct ieee80211_if_managed *ifmgd; 308 int c = 0; 309 310 /* Make sure it's our interface that got changed */ 311 if (!wdev) 312 return NOTIFY_DONE; 313 314 if (wdev->wiphy != local->hw.wiphy) 315 return NOTIFY_DONE; 316 317 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 318 bss_conf = &sdata->vif.bss_conf; 319 320 /* ARP filtering is only supported in managed mode */ 321 if (sdata->vif.type != NL80211_IFTYPE_STATION) 322 return NOTIFY_DONE; 323 324 idev = __in_dev_get_rtnl(sdata->dev); 325 if (!idev) 326 return NOTIFY_DONE; 327 328 ifmgd = &sdata->u.mgd; 329 sdata_lock(sdata); 330 331 /* Copy the addresses to the bss_conf list */ 332 ifa = idev->ifa_list; 333 while (ifa) { 334 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 335 bss_conf->arp_addr_list[c] = ifa->ifa_address; 336 ifa = ifa->ifa_next; 337 c++; 338 } 339 340 bss_conf->arp_addr_cnt = c; 341 342 /* Configure driver only if associated (which also implies it is up) */ 343 if (ifmgd->associated) 344 ieee80211_bss_info_change_notify(sdata, 345 BSS_CHANGED_ARP_FILTER); 346 347 sdata_unlock(sdata); 348 349 return NOTIFY_OK; 350 } 351 #endif 352 353 #if IS_ENABLED(CONFIG_IPV6) 354 static int ieee80211_ifa6_changed(struct notifier_block *nb, 355 unsigned long data, void *arg) 356 { 357 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 358 struct inet6_dev *idev = ifa->idev; 359 struct net_device *ndev = ifa->idev->dev; 360 struct ieee80211_local *local = 361 container_of(nb, struct ieee80211_local, ifa6_notifier); 362 struct wireless_dev *wdev = ndev->ieee80211_ptr; 363 struct ieee80211_sub_if_data *sdata; 364 365 /* Make sure it's our interface that got changed */ 366 if (!wdev || wdev->wiphy != local->hw.wiphy) 367 return NOTIFY_DONE; 368 369 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 370 371 /* 372 * For now only support station mode. This is mostly because 373 * doing AP would have to handle AP_VLAN in some way ... 374 */ 375 if (sdata->vif.type != NL80211_IFTYPE_STATION) 376 return NOTIFY_DONE; 377 378 drv_ipv6_addr_change(local, sdata, idev); 379 380 return NOTIFY_OK; 381 } 382 #endif 383 384 /* There isn't a lot of sense in it, but you can transmit anything you like */ 385 static const struct ieee80211_txrx_stypes 386 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 387 [NL80211_IFTYPE_ADHOC] = { 388 .tx = 0xffff, 389 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 390 BIT(IEEE80211_STYPE_AUTH >> 4) | 391 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 392 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 393 }, 394 [NL80211_IFTYPE_STATION] = { 395 .tx = 0xffff, 396 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 398 }, 399 [NL80211_IFTYPE_AP] = { 400 .tx = 0xffff, 401 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 402 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 403 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 404 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 405 BIT(IEEE80211_STYPE_AUTH >> 4) | 406 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 407 BIT(IEEE80211_STYPE_ACTION >> 4), 408 }, 409 [NL80211_IFTYPE_AP_VLAN] = { 410 /* copy AP */ 411 .tx = 0xffff, 412 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 413 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 414 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 415 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 416 BIT(IEEE80211_STYPE_AUTH >> 4) | 417 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 418 BIT(IEEE80211_STYPE_ACTION >> 4), 419 }, 420 [NL80211_IFTYPE_P2P_CLIENT] = { 421 .tx = 0xffff, 422 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 424 }, 425 [NL80211_IFTYPE_P2P_GO] = { 426 .tx = 0xffff, 427 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 428 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 429 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 430 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 431 BIT(IEEE80211_STYPE_AUTH >> 4) | 432 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 433 BIT(IEEE80211_STYPE_ACTION >> 4), 434 }, 435 [NL80211_IFTYPE_MESH_POINT] = { 436 .tx = 0xffff, 437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 438 BIT(IEEE80211_STYPE_AUTH >> 4) | 439 BIT(IEEE80211_STYPE_DEAUTH >> 4), 440 }, 441 [NL80211_IFTYPE_P2P_DEVICE] = { 442 .tx = 0xffff, 443 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 444 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 445 }, 446 }; 447 448 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 449 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 450 IEEE80211_HT_AMPDU_PARM_DENSITY, 451 452 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 453 IEEE80211_HT_CAP_MAX_AMSDU | 454 IEEE80211_HT_CAP_SGI_20 | 455 IEEE80211_HT_CAP_SGI_40 | 456 IEEE80211_HT_CAP_LDPC_CODING | 457 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 458 .mcs = { 459 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 460 0xff, 0xff, 0xff, 0xff, 0xff, }, 461 }, 462 }; 463 464 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 465 .vht_cap_info = 466 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 467 IEEE80211_VHT_CAP_SHORT_GI_80 | 468 IEEE80211_VHT_CAP_SHORT_GI_160 | 469 IEEE80211_VHT_CAP_RXSTBC_1 | 470 IEEE80211_VHT_CAP_RXSTBC_2 | 471 IEEE80211_VHT_CAP_RXSTBC_3 | 472 IEEE80211_VHT_CAP_RXSTBC_4 | 473 IEEE80211_VHT_CAP_TXSTBC | 474 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 475 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 476 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 477 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 478 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 479 .supp_mcs = { 480 .rx_mcs_map = cpu_to_le16(~0), 481 .tx_mcs_map = cpu_to_le16(~0), 482 }, 483 }; 484 485 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 486 const struct ieee80211_ops *ops, 487 const char *requested_name) 488 { 489 struct ieee80211_local *local; 490 int priv_size, i; 491 struct wiphy *wiphy; 492 bool use_chanctx; 493 494 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 495 !ops->add_interface || !ops->remove_interface || 496 !ops->configure_filter)) 497 return NULL; 498 499 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 500 return NULL; 501 502 /* check all or no channel context operations exist */ 503 i = !!ops->add_chanctx + !!ops->remove_chanctx + 504 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 505 !!ops->unassign_vif_chanctx; 506 if (WARN_ON(i != 0 && i != 5)) 507 return NULL; 508 use_chanctx = i == 5; 509 510 /* Ensure 32-byte alignment of our private data and hw private data. 511 * We use the wiphy priv data for both our ieee80211_local and for 512 * the driver's private data 513 * 514 * In memory it'll be like this: 515 * 516 * +-------------------------+ 517 * | struct wiphy | 518 * +-------------------------+ 519 * | struct ieee80211_local | 520 * +-------------------------+ 521 * | driver's private data | 522 * +-------------------------+ 523 * 524 */ 525 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 526 527 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 528 529 if (!wiphy) 530 return NULL; 531 532 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 533 534 wiphy->privid = mac80211_wiphy_privid; 535 536 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 537 WIPHY_FLAG_4ADDR_AP | 538 WIPHY_FLAG_4ADDR_STATION | 539 WIPHY_FLAG_REPORTS_OBSS | 540 WIPHY_FLAG_OFFCHAN_TX; 541 542 if (ops->remain_on_channel) 543 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 544 545 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 546 NL80211_FEATURE_SAE | 547 NL80211_FEATURE_HT_IBSS | 548 NL80211_FEATURE_VIF_TXPOWER | 549 NL80211_FEATURE_MAC_ON_CREATE | 550 NL80211_FEATURE_USERSPACE_MPM | 551 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 552 553 if (!ops->hw_scan) 554 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 555 NL80211_FEATURE_AP_SCAN; 556 557 558 if (!ops->set_key) 559 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 560 561 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 562 563 local = wiphy_priv(wiphy); 564 565 if (sta_info_init(local)) 566 goto err_free; 567 568 local->hw.wiphy = wiphy; 569 570 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 571 572 local->ops = ops; 573 local->use_chanctx = use_chanctx; 574 575 /* set up some defaults */ 576 local->hw.queues = 1; 577 local->hw.max_rates = 1; 578 local->hw.max_report_rates = 0; 579 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 580 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 581 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 582 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 583 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 584 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 585 IEEE80211_RADIOTAP_MCS_HAVE_GI | 586 IEEE80211_RADIOTAP_MCS_HAVE_BW; 587 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 588 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 589 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 590 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 591 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 592 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 593 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 594 595 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 596 597 wiphy->extended_capabilities = local->ext_capa; 598 wiphy->extended_capabilities_mask = local->ext_capa; 599 wiphy->extended_capabilities_len = 600 ARRAY_SIZE(local->ext_capa); 601 602 INIT_LIST_HEAD(&local->interfaces); 603 604 __hw_addr_init(&local->mc_list); 605 606 mutex_init(&local->iflist_mtx); 607 mutex_init(&local->mtx); 608 609 mutex_init(&local->key_mtx); 610 spin_lock_init(&local->filter_lock); 611 spin_lock_init(&local->rx_path_lock); 612 spin_lock_init(&local->queue_stop_reason_lock); 613 614 INIT_LIST_HEAD(&local->chanctx_list); 615 mutex_init(&local->chanctx_mtx); 616 617 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 618 619 INIT_WORK(&local->restart_work, ieee80211_restart_work); 620 621 INIT_WORK(&local->radar_detected_work, 622 ieee80211_dfs_radar_detected_work); 623 624 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 625 local->smps_mode = IEEE80211_SMPS_OFF; 626 627 INIT_WORK(&local->dynamic_ps_enable_work, 628 ieee80211_dynamic_ps_enable_work); 629 INIT_WORK(&local->dynamic_ps_disable_work, 630 ieee80211_dynamic_ps_disable_work); 631 setup_timer(&local->dynamic_ps_timer, 632 ieee80211_dynamic_ps_timer, (unsigned long) local); 633 634 INIT_WORK(&local->sched_scan_stopped_work, 635 ieee80211_sched_scan_stopped_work); 636 637 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 638 639 spin_lock_init(&local->ack_status_lock); 640 idr_init(&local->ack_status_frames); 641 642 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 643 skb_queue_head_init(&local->pending[i]); 644 atomic_set(&local->agg_queue_stop[i], 0); 645 } 646 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 647 (unsigned long)local); 648 649 tasklet_init(&local->tasklet, 650 ieee80211_tasklet_handler, 651 (unsigned long) local); 652 653 skb_queue_head_init(&local->skb_queue); 654 skb_queue_head_init(&local->skb_queue_unreliable); 655 skb_queue_head_init(&local->skb_queue_tdls_chsw); 656 657 ieee80211_alloc_led_names(local); 658 659 ieee80211_roc_setup(local); 660 661 return &local->hw; 662 err_free: 663 wiphy_free(wiphy); 664 return NULL; 665 } 666 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 667 668 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 669 { 670 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 671 IS_ERR(local->wep_rx_tfm)); 672 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 673 int n_suites = 0, r = 0, w = 0; 674 u32 *suites; 675 static const u32 cipher_suites[] = { 676 /* keep WEP first, it may be removed below */ 677 WLAN_CIPHER_SUITE_WEP40, 678 WLAN_CIPHER_SUITE_WEP104, 679 WLAN_CIPHER_SUITE_TKIP, 680 WLAN_CIPHER_SUITE_CCMP, 681 WLAN_CIPHER_SUITE_CCMP_256, 682 WLAN_CIPHER_SUITE_GCMP, 683 WLAN_CIPHER_SUITE_GCMP_256, 684 685 /* keep last -- depends on hw flags! */ 686 WLAN_CIPHER_SUITE_AES_CMAC, 687 WLAN_CIPHER_SUITE_BIP_CMAC_256, 688 WLAN_CIPHER_SUITE_BIP_GMAC_128, 689 WLAN_CIPHER_SUITE_BIP_GMAC_256, 690 }; 691 692 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 693 local->hw.wiphy->cipher_suites) { 694 /* If the driver advertises, or doesn't support SW crypto, 695 * we only need to remove WEP if necessary. 696 */ 697 if (have_wep) 698 return 0; 699 700 /* well if it has _no_ ciphers ... fine */ 701 if (!local->hw.wiphy->n_cipher_suites) 702 return 0; 703 704 /* Driver provides cipher suites, but we need to exclude WEP */ 705 suites = kmemdup(local->hw.wiphy->cipher_suites, 706 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 707 GFP_KERNEL); 708 if (!suites) 709 return -ENOMEM; 710 711 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 712 u32 suite = local->hw.wiphy->cipher_suites[r]; 713 714 if (suite == WLAN_CIPHER_SUITE_WEP40 || 715 suite == WLAN_CIPHER_SUITE_WEP104) 716 continue; 717 suites[w++] = suite; 718 } 719 } else if (!local->hw.cipher_schemes) { 720 /* If the driver doesn't have cipher schemes, there's nothing 721 * else to do other than assign the (software supported and 722 * perhaps offloaded) cipher suites. 723 */ 724 local->hw.wiphy->cipher_suites = cipher_suites; 725 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 726 727 if (!have_mfp) 728 local->hw.wiphy->n_cipher_suites -= 4; 729 730 if (!have_wep) { 731 local->hw.wiphy->cipher_suites += 2; 732 local->hw.wiphy->n_cipher_suites -= 2; 733 } 734 735 /* not dynamically allocated, so just return */ 736 return 0; 737 } else { 738 const struct ieee80211_cipher_scheme *cs; 739 740 cs = local->hw.cipher_schemes; 741 742 /* Driver specifies cipher schemes only (but not cipher suites 743 * including the schemes) 744 * 745 * We start counting ciphers defined by schemes, TKIP, CCMP, 746 * CCMP-256, GCMP, and GCMP-256 747 */ 748 n_suites = local->hw.n_cipher_schemes + 5; 749 750 /* check if we have WEP40 and WEP104 */ 751 if (have_wep) 752 n_suites += 2; 753 754 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 755 * BIP-GMAC-256 756 */ 757 if (have_mfp) 758 n_suites += 4; 759 760 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 761 if (!suites) 762 return -ENOMEM; 763 764 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 765 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 766 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 767 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 768 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 769 770 if (have_wep) { 771 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 772 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 773 } 774 775 if (have_mfp) { 776 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 777 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 778 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 779 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 780 } 781 782 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 783 suites[w++] = cs[r].cipher; 784 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 785 kfree(suites); 786 return -EINVAL; 787 } 788 } 789 } 790 791 local->hw.wiphy->cipher_suites = suites; 792 local->hw.wiphy->n_cipher_suites = w; 793 local->wiphy_ciphers_allocated = true; 794 795 return 0; 796 } 797 798 int ieee80211_register_hw(struct ieee80211_hw *hw) 799 { 800 struct ieee80211_local *local = hw_to_local(hw); 801 int result, i; 802 enum ieee80211_band band; 803 int channels, max_bitrates; 804 bool supp_ht, supp_vht; 805 netdev_features_t feature_whitelist; 806 struct cfg80211_chan_def dflt_chandef = {}; 807 808 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 809 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 810 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 811 return -EINVAL; 812 813 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 814 (!local->ops->tdls_channel_switch || 815 !local->ops->tdls_cancel_channel_switch || 816 !local->ops->tdls_recv_channel_switch)) 817 return -EOPNOTSUPP; 818 819 #ifdef CONFIG_PM 820 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 821 return -EINVAL; 822 #endif 823 824 if (!local->use_chanctx) { 825 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 826 const struct ieee80211_iface_combination *comb; 827 828 comb = &local->hw.wiphy->iface_combinations[i]; 829 830 if (comb->num_different_channels > 1) 831 return -EINVAL; 832 } 833 } else { 834 /* 835 * WDS is currently prohibited when channel contexts are used 836 * because there's no clear definition of which channel WDS 837 * type interfaces use 838 */ 839 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 840 return -EINVAL; 841 842 /* DFS is not supported with multi-channel combinations yet */ 843 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 844 const struct ieee80211_iface_combination *comb; 845 846 comb = &local->hw.wiphy->iface_combinations[i]; 847 848 if (comb->radar_detect_widths && 849 comb->num_different_channels > 1) 850 return -EINVAL; 851 } 852 } 853 854 /* Only HW csum features are currently compatible with mac80211 */ 855 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 856 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 857 NETIF_F_GSO_SOFTWARE; 858 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 859 return -EINVAL; 860 861 if (hw->max_report_rates == 0) 862 hw->max_report_rates = hw->max_rates; 863 864 local->rx_chains = 1; 865 866 /* 867 * generic code guarantees at least one band, 868 * set this very early because much code assumes 869 * that hw.conf.channel is assigned 870 */ 871 channels = 0; 872 max_bitrates = 0; 873 supp_ht = false; 874 supp_vht = false; 875 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 876 struct ieee80211_supported_band *sband; 877 878 sband = local->hw.wiphy->bands[band]; 879 if (!sband) 880 continue; 881 882 if (!dflt_chandef.chan) { 883 cfg80211_chandef_create(&dflt_chandef, 884 &sband->channels[0], 885 NL80211_CHAN_NO_HT); 886 /* init channel we're on */ 887 if (!local->use_chanctx && !local->_oper_chandef.chan) { 888 local->hw.conf.chandef = dflt_chandef; 889 local->_oper_chandef = dflt_chandef; 890 } 891 local->monitor_chandef = dflt_chandef; 892 } 893 894 channels += sband->n_channels; 895 896 if (max_bitrates < sband->n_bitrates) 897 max_bitrates = sband->n_bitrates; 898 supp_ht = supp_ht || sband->ht_cap.ht_supported; 899 supp_vht = supp_vht || sband->vht_cap.vht_supported; 900 901 if (sband->ht_cap.ht_supported) 902 local->rx_chains = 903 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 904 local->rx_chains); 905 906 /* TODO: consider VHT for RX chains, hopefully it's the same */ 907 } 908 909 /* if low-level driver supports AP, we also support VLAN */ 910 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 911 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 912 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 913 } 914 915 /* mac80211 always supports monitor */ 916 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 917 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 918 919 /* mac80211 doesn't support more than one IBSS interface right now */ 920 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 921 const struct ieee80211_iface_combination *c; 922 int j; 923 924 c = &hw->wiphy->iface_combinations[i]; 925 926 for (j = 0; j < c->n_limits; j++) 927 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 928 c->limits[j].max > 1) 929 return -EINVAL; 930 } 931 932 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 933 sizeof(void *) * channels, GFP_KERNEL); 934 if (!local->int_scan_req) 935 return -ENOMEM; 936 937 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 938 if (!local->hw.wiphy->bands[band]) 939 continue; 940 local->int_scan_req->rates[band] = (u32) -1; 941 } 942 943 #ifndef CONFIG_MAC80211_MESH 944 /* mesh depends on Kconfig, but drivers should set it if they want */ 945 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 946 #endif 947 948 /* if the underlying driver supports mesh, mac80211 will (at least) 949 * provide routing of mesh authentication frames to userspace */ 950 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 951 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 952 953 /* mac80211 supports control port protocol changing */ 954 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 955 956 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 957 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 958 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 959 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 960 if (hw->max_signal <= 0) { 961 result = -EINVAL; 962 goto fail_wiphy_register; 963 } 964 } 965 966 /* 967 * Calculate scan IE length -- we need this to alloc 968 * memory and to subtract from the driver limit. It 969 * includes the DS Params, (extended) supported rates, and HT 970 * information -- SSID is the driver's responsibility. 971 */ 972 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 973 3 /* DS Params */; 974 if (supp_ht) 975 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 976 977 if (supp_vht) 978 local->scan_ies_len += 979 2 + sizeof(struct ieee80211_vht_cap); 980 981 if (!local->ops->hw_scan) { 982 /* For hw_scan, driver needs to set these up. */ 983 local->hw.wiphy->max_scan_ssids = 4; 984 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 985 } 986 987 /* 988 * If the driver supports any scan IEs, then assume the 989 * limit includes the IEs mac80211 will add, otherwise 990 * leave it at zero and let the driver sort it out; we 991 * still pass our IEs to the driver but userspace will 992 * not be allowed to in that case. 993 */ 994 if (local->hw.wiphy->max_scan_ie_len) 995 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 996 997 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 998 local->hw.n_cipher_schemes)); 999 1000 result = ieee80211_init_cipher_suites(local); 1001 if (result < 0) 1002 goto fail_wiphy_register; 1003 1004 if (!local->ops->remain_on_channel) 1005 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1006 1007 /* mac80211 based drivers don't support internal TDLS setup */ 1008 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1009 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1010 1011 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1012 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1013 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1014 1015 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1016 1017 result = wiphy_register(local->hw.wiphy); 1018 if (result < 0) 1019 goto fail_wiphy_register; 1020 1021 /* 1022 * We use the number of queues for feature tests (QoS, HT) internally 1023 * so restrict them appropriately. 1024 */ 1025 if (hw->queues > IEEE80211_MAX_QUEUES) 1026 hw->queues = IEEE80211_MAX_QUEUES; 1027 1028 local->workqueue = 1029 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1030 if (!local->workqueue) { 1031 result = -ENOMEM; 1032 goto fail_workqueue; 1033 } 1034 1035 /* 1036 * The hardware needs headroom for sending the frame, 1037 * and we need some headroom for passing the frame to monitor 1038 * interfaces, but never both at the same time. 1039 */ 1040 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1041 IEEE80211_TX_STATUS_HEADROOM); 1042 1043 debugfs_hw_add(local); 1044 1045 /* 1046 * if the driver doesn't specify a max listen interval we 1047 * use 5 which should be a safe default 1048 */ 1049 if (local->hw.max_listen_interval == 0) 1050 local->hw.max_listen_interval = 5; 1051 1052 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1053 1054 local->dynamic_ps_forced_timeout = -1; 1055 1056 if (!local->hw.txq_ac_max_pending) 1057 local->hw.txq_ac_max_pending = 64; 1058 1059 result = ieee80211_wep_init(local); 1060 if (result < 0) 1061 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1062 result); 1063 1064 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1065 1066 ieee80211_led_init(local); 1067 1068 rtnl_lock(); 1069 1070 result = ieee80211_init_rate_ctrl_alg(local, 1071 hw->rate_control_algorithm); 1072 if (result < 0) { 1073 wiphy_debug(local->hw.wiphy, 1074 "Failed to initialize rate control algorithm\n"); 1075 goto fail_rate; 1076 } 1077 1078 /* add one default STA interface if supported */ 1079 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1080 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1081 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1082 NL80211_IFTYPE_STATION, NULL); 1083 if (result) 1084 wiphy_warn(local->hw.wiphy, 1085 "Failed to add default virtual iface\n"); 1086 } 1087 1088 rtnl_unlock(); 1089 1090 #ifdef CONFIG_INET 1091 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1092 result = register_inetaddr_notifier(&local->ifa_notifier); 1093 if (result) 1094 goto fail_ifa; 1095 #endif 1096 1097 #if IS_ENABLED(CONFIG_IPV6) 1098 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1099 result = register_inet6addr_notifier(&local->ifa6_notifier); 1100 if (result) 1101 goto fail_ifa6; 1102 #endif 1103 1104 return 0; 1105 1106 #if IS_ENABLED(CONFIG_IPV6) 1107 fail_ifa6: 1108 #ifdef CONFIG_INET 1109 unregister_inetaddr_notifier(&local->ifa_notifier); 1110 #endif 1111 #endif 1112 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1113 fail_ifa: 1114 #endif 1115 rtnl_lock(); 1116 rate_control_deinitialize(local); 1117 ieee80211_remove_interfaces(local); 1118 fail_rate: 1119 rtnl_unlock(); 1120 ieee80211_led_exit(local); 1121 ieee80211_wep_free(local); 1122 destroy_workqueue(local->workqueue); 1123 fail_workqueue: 1124 wiphy_unregister(local->hw.wiphy); 1125 fail_wiphy_register: 1126 if (local->wiphy_ciphers_allocated) 1127 kfree(local->hw.wiphy->cipher_suites); 1128 kfree(local->int_scan_req); 1129 return result; 1130 } 1131 EXPORT_SYMBOL(ieee80211_register_hw); 1132 1133 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1134 { 1135 struct ieee80211_local *local = hw_to_local(hw); 1136 1137 tasklet_kill(&local->tx_pending_tasklet); 1138 tasklet_kill(&local->tasklet); 1139 1140 #ifdef CONFIG_INET 1141 unregister_inetaddr_notifier(&local->ifa_notifier); 1142 #endif 1143 #if IS_ENABLED(CONFIG_IPV6) 1144 unregister_inet6addr_notifier(&local->ifa6_notifier); 1145 #endif 1146 1147 rtnl_lock(); 1148 1149 /* 1150 * At this point, interface list manipulations are fine 1151 * because the driver cannot be handing us frames any 1152 * more and the tasklet is killed. 1153 */ 1154 ieee80211_remove_interfaces(local); 1155 1156 rtnl_unlock(); 1157 1158 cancel_delayed_work_sync(&local->roc_work); 1159 cancel_work_sync(&local->restart_work); 1160 cancel_work_sync(&local->reconfig_filter); 1161 cancel_work_sync(&local->tdls_chsw_work); 1162 flush_work(&local->sched_scan_stopped_work); 1163 1164 ieee80211_clear_tx_pending(local); 1165 rate_control_deinitialize(local); 1166 1167 if (skb_queue_len(&local->skb_queue) || 1168 skb_queue_len(&local->skb_queue_unreliable)) 1169 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1170 skb_queue_purge(&local->skb_queue); 1171 skb_queue_purge(&local->skb_queue_unreliable); 1172 skb_queue_purge(&local->skb_queue_tdls_chsw); 1173 1174 destroy_workqueue(local->workqueue); 1175 wiphy_unregister(local->hw.wiphy); 1176 ieee80211_wep_free(local); 1177 ieee80211_led_exit(local); 1178 kfree(local->int_scan_req); 1179 } 1180 EXPORT_SYMBOL(ieee80211_unregister_hw); 1181 1182 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1183 { 1184 WARN_ONCE(1, "Have pending ack frames!\n"); 1185 kfree_skb(p); 1186 return 0; 1187 } 1188 1189 void ieee80211_free_hw(struct ieee80211_hw *hw) 1190 { 1191 struct ieee80211_local *local = hw_to_local(hw); 1192 1193 mutex_destroy(&local->iflist_mtx); 1194 mutex_destroy(&local->mtx); 1195 1196 if (local->wiphy_ciphers_allocated) 1197 kfree(local->hw.wiphy->cipher_suites); 1198 1199 idr_for_each(&local->ack_status_frames, 1200 ieee80211_free_ack_frame, NULL); 1201 idr_destroy(&local->ack_status_frames); 1202 1203 sta_info_stop(local); 1204 1205 ieee80211_free_led_names(local); 1206 1207 wiphy_free(local->hw.wiphy); 1208 } 1209 EXPORT_SYMBOL(ieee80211_free_hw); 1210 1211 static int __init ieee80211_init(void) 1212 { 1213 struct sk_buff *skb; 1214 int ret; 1215 1216 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1217 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1218 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1219 1220 ret = rc80211_minstrel_init(); 1221 if (ret) 1222 return ret; 1223 1224 ret = rc80211_minstrel_ht_init(); 1225 if (ret) 1226 goto err_minstrel; 1227 1228 ret = ieee80211_iface_init(); 1229 if (ret) 1230 goto err_netdev; 1231 1232 return 0; 1233 err_netdev: 1234 rc80211_minstrel_ht_exit(); 1235 err_minstrel: 1236 rc80211_minstrel_exit(); 1237 1238 return ret; 1239 } 1240 1241 static void __exit ieee80211_exit(void) 1242 { 1243 rc80211_minstrel_ht_exit(); 1244 rc80211_minstrel_exit(); 1245 1246 ieee80211s_stop(); 1247 1248 ieee80211_iface_exit(); 1249 1250 rcu_barrier(); 1251 } 1252 1253 1254 subsys_initcall(ieee80211_init); 1255 module_exit(ieee80211_exit); 1256 1257 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1258 MODULE_LICENSE("GPL"); 1259