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_allmultis)) 45 new_flags |= FIF_ALLMULTI; 46 47 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 48 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 49 new_flags |= FIF_BCN_PRBRESP_PROMISC; 50 51 if (local->fif_probe_req || local->probe_req_reg) 52 new_flags |= FIF_PROBE_REQ; 53 54 if (local->fif_fcsfail) 55 new_flags |= FIF_FCSFAIL; 56 57 if (local->fif_plcpfail) 58 new_flags |= FIF_PLCPFAIL; 59 60 if (local->fif_control) 61 new_flags |= FIF_CONTROL; 62 63 if (local->fif_other_bss) 64 new_flags |= FIF_OTHER_BSS; 65 66 if (local->fif_pspoll) 67 new_flags |= FIF_PSPOLL; 68 69 spin_lock_bh(&local->filter_lock); 70 changed_flags = local->filter_flags ^ new_flags; 71 72 mc = drv_prepare_multicast(local, &local->mc_list); 73 spin_unlock_bh(&local->filter_lock); 74 75 /* be a bit nasty */ 76 new_flags |= (1<<31); 77 78 drv_configure_filter(local, changed_flags, &new_flags, mc); 79 80 WARN_ON(new_flags & (1<<31)); 81 82 local->filter_flags = new_flags & ~(1<<31); 83 } 84 85 static void ieee80211_reconfig_filter(struct work_struct *work) 86 { 87 struct ieee80211_local *local = 88 container_of(work, struct ieee80211_local, reconfig_filter); 89 90 ieee80211_configure_filter(local); 91 } 92 93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 94 { 95 struct ieee80211_sub_if_data *sdata; 96 struct cfg80211_chan_def chandef = {}; 97 u32 changed = 0; 98 int power; 99 u32 offchannel_flag; 100 101 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 102 103 if (local->scan_chandef.chan) { 104 chandef = local->scan_chandef; 105 } else if (local->tmp_channel) { 106 chandef.chan = local->tmp_channel; 107 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 108 chandef.center_freq1 = chandef.chan->center_freq; 109 } else 110 chandef = local->_oper_chandef; 111 112 WARN(!cfg80211_chandef_valid(&chandef), 113 "control:%d MHz width:%d center: %d/%d MHz", 114 chandef.chan->center_freq, chandef.width, 115 chandef.center_freq1, chandef.center_freq2); 116 117 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 118 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 119 else 120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 121 122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 123 124 if (offchannel_flag || 125 !cfg80211_chandef_identical(&local->hw.conf.chandef, 126 &local->_oper_chandef)) { 127 local->hw.conf.chandef = chandef; 128 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 129 } 130 131 if (!conf_is_ht(&local->hw.conf)) { 132 /* 133 * mac80211.h documents that this is only valid 134 * when the channel is set to an HT type, and 135 * that otherwise STATIC is used. 136 */ 137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 138 } else if (local->hw.conf.smps_mode != local->smps_mode) { 139 local->hw.conf.smps_mode = local->smps_mode; 140 changed |= IEEE80211_CONF_CHANGE_SMPS; 141 } 142 143 power = ieee80211_chandef_max_power(&chandef); 144 145 rcu_read_lock(); 146 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 147 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 148 continue; 149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 150 continue; 151 power = min(power, sdata->vif.bss_conf.txpower); 152 } 153 rcu_read_unlock(); 154 155 if (local->hw.conf.power_level != power) { 156 changed |= IEEE80211_CONF_CHANGE_POWER; 157 local->hw.conf.power_level = power; 158 } 159 160 return changed; 161 } 162 163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 164 { 165 int ret = 0; 166 167 might_sleep(); 168 169 if (!local->use_chanctx) 170 changed |= ieee80211_hw_conf_chan(local); 171 else 172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 173 IEEE80211_CONF_CHANGE_POWER); 174 175 if (changed && local->open_count) { 176 ret = drv_config(local, changed); 177 /* 178 * Goal: 179 * HW reconfiguration should never fail, the driver has told 180 * us what it can support so it should live up to that promise. 181 * 182 * Current status: 183 * rfkill is not integrated with mac80211 and a 184 * configuration command can thus fail if hardware rfkill 185 * is enabled 186 * 187 * FIXME: integrate rfkill with mac80211 and then add this 188 * WARN_ON() back 189 * 190 */ 191 /* WARN_ON(ret); */ 192 } 193 194 return ret; 195 } 196 197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 198 u32 changed) 199 { 200 struct ieee80211_local *local = sdata->local; 201 202 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 203 return; 204 205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 206 } 207 208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 209 { 210 sdata->vif.bss_conf.use_cts_prot = false; 211 sdata->vif.bss_conf.use_short_preamble = false; 212 sdata->vif.bss_conf.use_short_slot = false; 213 return BSS_CHANGED_ERP_CTS_PROT | 214 BSS_CHANGED_ERP_PREAMBLE | 215 BSS_CHANGED_ERP_SLOT; 216 } 217 218 static void ieee80211_tasklet_handler(unsigned long data) 219 { 220 struct ieee80211_local *local = (struct ieee80211_local *) data; 221 struct sk_buff *skb; 222 223 while ((skb = skb_dequeue(&local->skb_queue)) || 224 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 225 switch (skb->pkt_type) { 226 case IEEE80211_RX_MSG: 227 /* Clear skb->pkt_type in order to not confuse kernel 228 * netstack. */ 229 skb->pkt_type = 0; 230 ieee80211_rx(&local->hw, skb); 231 break; 232 case IEEE80211_TX_STATUS_MSG: 233 skb->pkt_type = 0; 234 ieee80211_tx_status(&local->hw, skb); 235 break; 236 default: 237 WARN(1, "mac80211: Packet is of unknown type %d\n", 238 skb->pkt_type); 239 dev_kfree_skb(skb); 240 break; 241 } 242 } 243 } 244 245 static void ieee80211_restart_work(struct work_struct *work) 246 { 247 struct ieee80211_local *local = 248 container_of(work, struct ieee80211_local, restart_work); 249 struct ieee80211_sub_if_data *sdata; 250 251 /* wait for scan work complete */ 252 flush_workqueue(local->workqueue); 253 254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 255 "%s called with hardware scan in progress\n", __func__); 256 257 rtnl_lock(); 258 list_for_each_entry(sdata, &local->interfaces, list) 259 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 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 if (sta_info_init(local)) 561 goto err_free; 562 563 local->hw.wiphy = wiphy; 564 565 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 566 567 local->ops = ops; 568 local->use_chanctx = use_chanctx; 569 570 /* set up some defaults */ 571 local->hw.queues = 1; 572 local->hw.max_rates = 1; 573 local->hw.max_report_rates = 0; 574 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 575 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 576 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 577 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 578 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 579 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 580 IEEE80211_RADIOTAP_MCS_HAVE_GI | 581 IEEE80211_RADIOTAP_MCS_HAVE_BW; 582 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 583 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 584 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 585 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 586 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 587 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 588 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 589 590 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 591 592 wiphy->extended_capabilities = local->ext_capa; 593 wiphy->extended_capabilities_mask = local->ext_capa; 594 wiphy->extended_capabilities_len = 595 ARRAY_SIZE(local->ext_capa); 596 597 INIT_LIST_HEAD(&local->interfaces); 598 599 __hw_addr_init(&local->mc_list); 600 601 mutex_init(&local->iflist_mtx); 602 mutex_init(&local->mtx); 603 604 mutex_init(&local->key_mtx); 605 spin_lock_init(&local->filter_lock); 606 spin_lock_init(&local->rx_path_lock); 607 spin_lock_init(&local->queue_stop_reason_lock); 608 609 INIT_LIST_HEAD(&local->chanctx_list); 610 mutex_init(&local->chanctx_mtx); 611 612 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 613 614 INIT_WORK(&local->restart_work, ieee80211_restart_work); 615 616 INIT_WORK(&local->radar_detected_work, 617 ieee80211_dfs_radar_detected_work); 618 619 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 620 local->smps_mode = IEEE80211_SMPS_OFF; 621 622 INIT_WORK(&local->dynamic_ps_enable_work, 623 ieee80211_dynamic_ps_enable_work); 624 INIT_WORK(&local->dynamic_ps_disable_work, 625 ieee80211_dynamic_ps_disable_work); 626 setup_timer(&local->dynamic_ps_timer, 627 ieee80211_dynamic_ps_timer, (unsigned long) local); 628 629 INIT_WORK(&local->sched_scan_stopped_work, 630 ieee80211_sched_scan_stopped_work); 631 632 spin_lock_init(&local->ack_status_lock); 633 idr_init(&local->ack_status_frames); 634 635 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 636 skb_queue_head_init(&local->pending[i]); 637 atomic_set(&local->agg_queue_stop[i], 0); 638 } 639 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 640 (unsigned long)local); 641 642 tasklet_init(&local->tasklet, 643 ieee80211_tasklet_handler, 644 (unsigned long) local); 645 646 skb_queue_head_init(&local->skb_queue); 647 skb_queue_head_init(&local->skb_queue_unreliable); 648 649 ieee80211_alloc_led_names(local); 650 651 ieee80211_roc_setup(local); 652 653 return &local->hw; 654 err_free: 655 wiphy_free(wiphy); 656 return NULL; 657 } 658 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 659 660 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 661 { 662 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 663 IS_ERR(local->wep_rx_tfm)); 664 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 665 int n_suites = 0, r = 0, w = 0; 666 u32 *suites; 667 static const u32 cipher_suites[] = { 668 /* keep WEP first, it may be removed below */ 669 WLAN_CIPHER_SUITE_WEP40, 670 WLAN_CIPHER_SUITE_WEP104, 671 WLAN_CIPHER_SUITE_TKIP, 672 WLAN_CIPHER_SUITE_CCMP, 673 WLAN_CIPHER_SUITE_CCMP_256, 674 WLAN_CIPHER_SUITE_GCMP, 675 WLAN_CIPHER_SUITE_GCMP_256, 676 677 /* keep last -- depends on hw flags! */ 678 WLAN_CIPHER_SUITE_AES_CMAC, 679 WLAN_CIPHER_SUITE_BIP_CMAC_256, 680 WLAN_CIPHER_SUITE_BIP_GMAC_128, 681 WLAN_CIPHER_SUITE_BIP_GMAC_256, 682 }; 683 684 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 685 local->hw.wiphy->cipher_suites) { 686 /* If the driver advertises, or doesn't support SW crypto, 687 * we only need to remove WEP if necessary. 688 */ 689 if (have_wep) 690 return 0; 691 692 /* well if it has _no_ ciphers ... fine */ 693 if (!local->hw.wiphy->n_cipher_suites) 694 return 0; 695 696 /* Driver provides cipher suites, but we need to exclude WEP */ 697 suites = kmemdup(local->hw.wiphy->cipher_suites, 698 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 699 GFP_KERNEL); 700 if (!suites) 701 return -ENOMEM; 702 703 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 704 u32 suite = local->hw.wiphy->cipher_suites[r]; 705 706 if (suite == WLAN_CIPHER_SUITE_WEP40 || 707 suite == WLAN_CIPHER_SUITE_WEP104) 708 continue; 709 suites[w++] = suite; 710 } 711 } else if (!local->hw.cipher_schemes) { 712 /* If the driver doesn't have cipher schemes, there's nothing 713 * else to do other than assign the (software supported and 714 * perhaps offloaded) cipher suites. 715 */ 716 local->hw.wiphy->cipher_suites = cipher_suites; 717 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 718 719 if (!have_mfp) 720 local->hw.wiphy->n_cipher_suites -= 4; 721 722 if (!have_wep) { 723 local->hw.wiphy->cipher_suites += 2; 724 local->hw.wiphy->n_cipher_suites -= 2; 725 } 726 727 /* not dynamically allocated, so just return */ 728 return 0; 729 } else { 730 const struct ieee80211_cipher_scheme *cs; 731 732 cs = local->hw.cipher_schemes; 733 734 /* Driver specifies cipher schemes only (but not cipher suites 735 * including the schemes) 736 * 737 * We start counting ciphers defined by schemes, TKIP, CCMP, 738 * CCMP-256, GCMP, and GCMP-256 739 */ 740 n_suites = local->hw.n_cipher_schemes + 5; 741 742 /* check if we have WEP40 and WEP104 */ 743 if (have_wep) 744 n_suites += 2; 745 746 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 747 * BIP-GMAC-256 748 */ 749 if (have_mfp) 750 n_suites += 4; 751 752 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 753 if (!suites) 754 return -ENOMEM; 755 756 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 757 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 758 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 759 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 760 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 761 762 if (have_wep) { 763 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 764 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 765 } 766 767 if (have_mfp) { 768 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 769 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 770 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 771 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 772 } 773 774 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 775 suites[w++] = cs[r].cipher; 776 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 777 kfree(suites); 778 return -EINVAL; 779 } 780 } 781 } 782 783 local->hw.wiphy->cipher_suites = suites; 784 local->hw.wiphy->n_cipher_suites = w; 785 local->wiphy_ciphers_allocated = true; 786 787 return 0; 788 } 789 790 int ieee80211_register_hw(struct ieee80211_hw *hw) 791 { 792 struct ieee80211_local *local = hw_to_local(hw); 793 int result, i; 794 enum ieee80211_band band; 795 int channels, max_bitrates; 796 bool supp_ht, supp_vht; 797 netdev_features_t feature_whitelist; 798 struct cfg80211_chan_def dflt_chandef = {}; 799 800 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 801 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 802 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 803 return -EINVAL; 804 805 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 806 (!local->ops->tdls_channel_switch || 807 !local->ops->tdls_cancel_channel_switch || 808 !local->ops->tdls_recv_channel_switch)) 809 return -EOPNOTSUPP; 810 811 #ifdef CONFIG_PM 812 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 813 return -EINVAL; 814 #endif 815 816 if (!local->use_chanctx) { 817 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 818 const struct ieee80211_iface_combination *comb; 819 820 comb = &local->hw.wiphy->iface_combinations[i]; 821 822 if (comb->num_different_channels > 1) 823 return -EINVAL; 824 } 825 } else { 826 /* 827 * WDS is currently prohibited when channel contexts are used 828 * because there's no clear definition of which channel WDS 829 * type interfaces use 830 */ 831 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 832 return -EINVAL; 833 834 /* DFS is not supported with multi-channel combinations yet */ 835 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 836 const struct ieee80211_iface_combination *comb; 837 838 comb = &local->hw.wiphy->iface_combinations[i]; 839 840 if (comb->radar_detect_widths && 841 comb->num_different_channels > 1) 842 return -EINVAL; 843 } 844 } 845 846 /* Only HW csum features are currently compatible with mac80211 */ 847 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 848 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 849 NETIF_F_GSO_SOFTWARE; 850 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 851 return -EINVAL; 852 853 if (hw->max_report_rates == 0) 854 hw->max_report_rates = hw->max_rates; 855 856 local->rx_chains = 1; 857 858 /* 859 * generic code guarantees at least one band, 860 * set this very early because much code assumes 861 * that hw.conf.channel is assigned 862 */ 863 channels = 0; 864 max_bitrates = 0; 865 supp_ht = false; 866 supp_vht = false; 867 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 868 struct ieee80211_supported_band *sband; 869 870 sband = local->hw.wiphy->bands[band]; 871 if (!sband) 872 continue; 873 874 if (!dflt_chandef.chan) { 875 cfg80211_chandef_create(&dflt_chandef, 876 &sband->channels[0], 877 NL80211_CHAN_NO_HT); 878 /* init channel we're on */ 879 if (!local->use_chanctx && !local->_oper_chandef.chan) { 880 local->hw.conf.chandef = dflt_chandef; 881 local->_oper_chandef = dflt_chandef; 882 } 883 local->monitor_chandef = dflt_chandef; 884 } 885 886 channels += sband->n_channels; 887 888 if (max_bitrates < sband->n_bitrates) 889 max_bitrates = sband->n_bitrates; 890 supp_ht = supp_ht || sband->ht_cap.ht_supported; 891 supp_vht = supp_vht || sband->vht_cap.vht_supported; 892 893 if (sband->ht_cap.ht_supported) 894 local->rx_chains = 895 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 896 local->rx_chains); 897 898 /* TODO: consider VHT for RX chains, hopefully it's the same */ 899 } 900 901 /* if low-level driver supports AP, we also support VLAN */ 902 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 903 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 904 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 905 } 906 907 /* mac80211 always supports monitor */ 908 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 909 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 910 911 /* mac80211 doesn't support more than one IBSS interface right now */ 912 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 913 const struct ieee80211_iface_combination *c; 914 int j; 915 916 c = &hw->wiphy->iface_combinations[i]; 917 918 for (j = 0; j < c->n_limits; j++) 919 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 920 c->limits[j].max > 1) 921 return -EINVAL; 922 } 923 924 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 925 sizeof(void *) * channels, GFP_KERNEL); 926 if (!local->int_scan_req) 927 return -ENOMEM; 928 929 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 930 if (!local->hw.wiphy->bands[band]) 931 continue; 932 local->int_scan_req->rates[band] = (u32) -1; 933 } 934 935 #ifndef CONFIG_MAC80211_MESH 936 /* mesh depends on Kconfig, but drivers should set it if they want */ 937 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 938 #endif 939 940 /* if the underlying driver supports mesh, mac80211 will (at least) 941 * provide routing of mesh authentication frames to userspace */ 942 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 943 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 944 945 /* mac80211 supports control port protocol changing */ 946 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 947 948 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 949 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 950 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 951 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 952 if (hw->max_signal <= 0) { 953 result = -EINVAL; 954 goto fail_wiphy_register; 955 } 956 } 957 958 /* 959 * Calculate scan IE length -- we need this to alloc 960 * memory and to subtract from the driver limit. It 961 * includes the DS Params, (extended) supported rates, and HT 962 * information -- SSID is the driver's responsibility. 963 */ 964 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 965 3 /* DS Params */; 966 if (supp_ht) 967 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 968 969 if (supp_vht) 970 local->scan_ies_len += 971 2 + sizeof(struct ieee80211_vht_cap); 972 973 if (!local->ops->hw_scan) { 974 /* For hw_scan, driver needs to set these up. */ 975 local->hw.wiphy->max_scan_ssids = 4; 976 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 977 } 978 979 /* 980 * If the driver supports any scan IEs, then assume the 981 * limit includes the IEs mac80211 will add, otherwise 982 * leave it at zero and let the driver sort it out; we 983 * still pass our IEs to the driver but userspace will 984 * not be allowed to in that case. 985 */ 986 if (local->hw.wiphy->max_scan_ie_len) 987 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 988 989 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 990 local->hw.n_cipher_schemes)); 991 992 result = ieee80211_init_cipher_suites(local); 993 if (result < 0) 994 goto fail_wiphy_register; 995 996 if (!local->ops->remain_on_channel) 997 local->hw.wiphy->max_remain_on_channel_duration = 5000; 998 999 /* mac80211 based drivers don't support internal TDLS setup */ 1000 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1001 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1002 1003 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1004 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1005 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1006 1007 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1008 1009 result = wiphy_register(local->hw.wiphy); 1010 if (result < 0) 1011 goto fail_wiphy_register; 1012 1013 /* 1014 * We use the number of queues for feature tests (QoS, HT) internally 1015 * so restrict them appropriately. 1016 */ 1017 if (hw->queues > IEEE80211_MAX_QUEUES) 1018 hw->queues = IEEE80211_MAX_QUEUES; 1019 1020 local->workqueue = 1021 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1022 if (!local->workqueue) { 1023 result = -ENOMEM; 1024 goto fail_workqueue; 1025 } 1026 1027 /* 1028 * The hardware needs headroom for sending the frame, 1029 * and we need some headroom for passing the frame to monitor 1030 * interfaces, but never both at the same time. 1031 */ 1032 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1033 IEEE80211_TX_STATUS_HEADROOM); 1034 1035 debugfs_hw_add(local); 1036 1037 /* 1038 * if the driver doesn't specify a max listen interval we 1039 * use 5 which should be a safe default 1040 */ 1041 if (local->hw.max_listen_interval == 0) 1042 local->hw.max_listen_interval = 5; 1043 1044 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1045 1046 local->dynamic_ps_forced_timeout = -1; 1047 1048 if (!local->hw.txq_ac_max_pending) 1049 local->hw.txq_ac_max_pending = 64; 1050 1051 result = ieee80211_wep_init(local); 1052 if (result < 0) 1053 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1054 result); 1055 1056 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1057 1058 ieee80211_led_init(local); 1059 1060 rtnl_lock(); 1061 1062 result = ieee80211_init_rate_ctrl_alg(local, 1063 hw->rate_control_algorithm); 1064 if (result < 0) { 1065 wiphy_debug(local->hw.wiphy, 1066 "Failed to initialize rate control algorithm\n"); 1067 goto fail_rate; 1068 } 1069 1070 /* add one default STA interface if supported */ 1071 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1072 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1073 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1074 NL80211_IFTYPE_STATION, NULL); 1075 if (result) 1076 wiphy_warn(local->hw.wiphy, 1077 "Failed to add default virtual iface\n"); 1078 } 1079 1080 rtnl_unlock(); 1081 1082 local->network_latency_notifier.notifier_call = 1083 ieee80211_max_network_latency; 1084 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1085 &local->network_latency_notifier); 1086 if (result) 1087 goto fail_pm_qos; 1088 1089 #ifdef CONFIG_INET 1090 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1091 result = register_inetaddr_notifier(&local->ifa_notifier); 1092 if (result) 1093 goto fail_ifa; 1094 #endif 1095 1096 #if IS_ENABLED(CONFIG_IPV6) 1097 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1098 result = register_inet6addr_notifier(&local->ifa6_notifier); 1099 if (result) 1100 goto fail_ifa6; 1101 #endif 1102 1103 return 0; 1104 1105 #if IS_ENABLED(CONFIG_IPV6) 1106 fail_ifa6: 1107 #ifdef CONFIG_INET 1108 unregister_inetaddr_notifier(&local->ifa_notifier); 1109 #endif 1110 #endif 1111 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1112 fail_ifa: 1113 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1114 &local->network_latency_notifier); 1115 #endif 1116 fail_pm_qos: 1117 rtnl_lock(); 1118 rate_control_deinitialize(local); 1119 ieee80211_remove_interfaces(local); 1120 fail_rate: 1121 rtnl_unlock(); 1122 ieee80211_led_exit(local); 1123 ieee80211_wep_free(local); 1124 destroy_workqueue(local->workqueue); 1125 fail_workqueue: 1126 wiphy_unregister(local->hw.wiphy); 1127 fail_wiphy_register: 1128 if (local->wiphy_ciphers_allocated) 1129 kfree(local->hw.wiphy->cipher_suites); 1130 kfree(local->int_scan_req); 1131 return result; 1132 } 1133 EXPORT_SYMBOL(ieee80211_register_hw); 1134 1135 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 1136 struct net_device *napi_dev, 1137 int (*poll)(struct napi_struct *, int), 1138 int weight) 1139 { 1140 struct ieee80211_local *local = hw_to_local(hw); 1141 1142 netif_napi_add(napi_dev, napi, poll, weight); 1143 local->napi = napi; 1144 } 1145 EXPORT_SYMBOL_GPL(ieee80211_napi_add); 1146 1147 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1148 { 1149 struct ieee80211_local *local = hw_to_local(hw); 1150 1151 tasklet_kill(&local->tx_pending_tasklet); 1152 tasklet_kill(&local->tasklet); 1153 1154 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1155 &local->network_latency_notifier); 1156 #ifdef CONFIG_INET 1157 unregister_inetaddr_notifier(&local->ifa_notifier); 1158 #endif 1159 #if IS_ENABLED(CONFIG_IPV6) 1160 unregister_inet6addr_notifier(&local->ifa6_notifier); 1161 #endif 1162 1163 rtnl_lock(); 1164 1165 /* 1166 * At this point, interface list manipulations are fine 1167 * because the driver cannot be handing us frames any 1168 * more and the tasklet is killed. 1169 */ 1170 ieee80211_remove_interfaces(local); 1171 1172 rtnl_unlock(); 1173 1174 cancel_work_sync(&local->restart_work); 1175 cancel_work_sync(&local->reconfig_filter); 1176 flush_work(&local->sched_scan_stopped_work); 1177 1178 ieee80211_clear_tx_pending(local); 1179 rate_control_deinitialize(local); 1180 1181 if (skb_queue_len(&local->skb_queue) || 1182 skb_queue_len(&local->skb_queue_unreliable)) 1183 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1184 skb_queue_purge(&local->skb_queue); 1185 skb_queue_purge(&local->skb_queue_unreliable); 1186 1187 destroy_workqueue(local->workqueue); 1188 wiphy_unregister(local->hw.wiphy); 1189 ieee80211_wep_free(local); 1190 ieee80211_led_exit(local); 1191 kfree(local->int_scan_req); 1192 } 1193 EXPORT_SYMBOL(ieee80211_unregister_hw); 1194 1195 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1196 { 1197 WARN_ONCE(1, "Have pending ack frames!\n"); 1198 kfree_skb(p); 1199 return 0; 1200 } 1201 1202 void ieee80211_free_hw(struct ieee80211_hw *hw) 1203 { 1204 struct ieee80211_local *local = hw_to_local(hw); 1205 1206 mutex_destroy(&local->iflist_mtx); 1207 mutex_destroy(&local->mtx); 1208 1209 if (local->wiphy_ciphers_allocated) 1210 kfree(local->hw.wiphy->cipher_suites); 1211 1212 idr_for_each(&local->ack_status_frames, 1213 ieee80211_free_ack_frame, NULL); 1214 idr_destroy(&local->ack_status_frames); 1215 1216 sta_info_stop(local); 1217 1218 ieee80211_free_led_names(local); 1219 1220 wiphy_free(local->hw.wiphy); 1221 } 1222 EXPORT_SYMBOL(ieee80211_free_hw); 1223 1224 static int __init ieee80211_init(void) 1225 { 1226 struct sk_buff *skb; 1227 int ret; 1228 1229 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1230 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1231 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1232 1233 ret = rc80211_minstrel_init(); 1234 if (ret) 1235 return ret; 1236 1237 ret = rc80211_minstrel_ht_init(); 1238 if (ret) 1239 goto err_minstrel; 1240 1241 ret = ieee80211_iface_init(); 1242 if (ret) 1243 goto err_netdev; 1244 1245 return 0; 1246 err_netdev: 1247 rc80211_minstrel_ht_exit(); 1248 err_minstrel: 1249 rc80211_minstrel_exit(); 1250 1251 return ret; 1252 } 1253 1254 static void __exit ieee80211_exit(void) 1255 { 1256 rc80211_minstrel_ht_exit(); 1257 rc80211_minstrel_exit(); 1258 1259 ieee80211s_stop(); 1260 1261 ieee80211_iface_exit(); 1262 1263 rcu_barrier(); 1264 } 1265 1266 1267 subsys_initcall(ieee80211_init); 1268 module_exit(ieee80211_exit); 1269 1270 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1271 MODULE_LICENSE("GPL"); 1272