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 flush_work(&local->radar_detected_work); 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); 261 262 /* make sure any new ROC will consider local->in_reconfig */ 263 flush_delayed_work(&local->roc_work); 264 flush_work(&local->hw_roc_done); 265 266 /* wait for all packet processing to be done */ 267 synchronize_net(); 268 269 ieee80211_reconfig(local); 270 rtnl_unlock(); 271 } 272 273 void ieee80211_restart_hw(struct ieee80211_hw *hw) 274 { 275 struct ieee80211_local *local = hw_to_local(hw); 276 277 trace_api_restart_hw(local); 278 279 wiphy_info(hw->wiphy, 280 "Hardware restart was requested\n"); 281 282 /* use this reason, ieee80211_reconfig will unblock it */ 283 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 284 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 285 false); 286 287 /* 288 * Stop all Rx during the reconfig. We don't want state changes 289 * or driver callbacks while this is in progress. 290 */ 291 local->in_reconfig = true; 292 barrier(); 293 294 queue_work(system_freezable_wq, &local->restart_work); 295 } 296 EXPORT_SYMBOL(ieee80211_restart_hw); 297 298 #ifdef CONFIG_INET 299 static int ieee80211_ifa_changed(struct notifier_block *nb, 300 unsigned long data, void *arg) 301 { 302 struct in_ifaddr *ifa = arg; 303 struct ieee80211_local *local = 304 container_of(nb, struct ieee80211_local, 305 ifa_notifier); 306 struct net_device *ndev = ifa->ifa_dev->dev; 307 struct wireless_dev *wdev = ndev->ieee80211_ptr; 308 struct in_device *idev; 309 struct ieee80211_sub_if_data *sdata; 310 struct ieee80211_bss_conf *bss_conf; 311 struct ieee80211_if_managed *ifmgd; 312 int c = 0; 313 314 /* Make sure it's our interface that got changed */ 315 if (!wdev) 316 return NOTIFY_DONE; 317 318 if (wdev->wiphy != local->hw.wiphy) 319 return NOTIFY_DONE; 320 321 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 322 bss_conf = &sdata->vif.bss_conf; 323 324 /* ARP filtering is only supported in managed mode */ 325 if (sdata->vif.type != NL80211_IFTYPE_STATION) 326 return NOTIFY_DONE; 327 328 idev = __in_dev_get_rtnl(sdata->dev); 329 if (!idev) 330 return NOTIFY_DONE; 331 332 ifmgd = &sdata->u.mgd; 333 sdata_lock(sdata); 334 335 /* Copy the addresses to the bss_conf list */ 336 ifa = idev->ifa_list; 337 while (ifa) { 338 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 339 bss_conf->arp_addr_list[c] = ifa->ifa_address; 340 ifa = ifa->ifa_next; 341 c++; 342 } 343 344 bss_conf->arp_addr_cnt = c; 345 346 /* Configure driver only if associated (which also implies it is up) */ 347 if (ifmgd->associated) 348 ieee80211_bss_info_change_notify(sdata, 349 BSS_CHANGED_ARP_FILTER); 350 351 sdata_unlock(sdata); 352 353 return NOTIFY_OK; 354 } 355 #endif 356 357 #if IS_ENABLED(CONFIG_IPV6) 358 static int ieee80211_ifa6_changed(struct notifier_block *nb, 359 unsigned long data, void *arg) 360 { 361 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 362 struct inet6_dev *idev = ifa->idev; 363 struct net_device *ndev = ifa->idev->dev; 364 struct ieee80211_local *local = 365 container_of(nb, struct ieee80211_local, ifa6_notifier); 366 struct wireless_dev *wdev = ndev->ieee80211_ptr; 367 struct ieee80211_sub_if_data *sdata; 368 369 /* Make sure it's our interface that got changed */ 370 if (!wdev || wdev->wiphy != local->hw.wiphy) 371 return NOTIFY_DONE; 372 373 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 374 375 /* 376 * For now only support station mode. This is mostly because 377 * doing AP would have to handle AP_VLAN in some way ... 378 */ 379 if (sdata->vif.type != NL80211_IFTYPE_STATION) 380 return NOTIFY_DONE; 381 382 drv_ipv6_addr_change(local, sdata, idev); 383 384 return NOTIFY_OK; 385 } 386 #endif 387 388 /* There isn't a lot of sense in it, but you can transmit anything you like */ 389 static const struct ieee80211_txrx_stypes 390 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 391 [NL80211_IFTYPE_ADHOC] = { 392 .tx = 0xffff, 393 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 394 BIT(IEEE80211_STYPE_AUTH >> 4) | 395 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 396 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 397 }, 398 [NL80211_IFTYPE_STATION] = { 399 .tx = 0xffff, 400 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 401 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 402 }, 403 [NL80211_IFTYPE_AP] = { 404 .tx = 0xffff, 405 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 406 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 407 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 408 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 409 BIT(IEEE80211_STYPE_AUTH >> 4) | 410 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 411 BIT(IEEE80211_STYPE_ACTION >> 4), 412 }, 413 [NL80211_IFTYPE_AP_VLAN] = { 414 /* copy AP */ 415 .tx = 0xffff, 416 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 417 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 419 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 420 BIT(IEEE80211_STYPE_AUTH >> 4) | 421 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 422 BIT(IEEE80211_STYPE_ACTION >> 4), 423 }, 424 [NL80211_IFTYPE_P2P_CLIENT] = { 425 .tx = 0xffff, 426 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 427 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 428 }, 429 [NL80211_IFTYPE_P2P_GO] = { 430 .tx = 0xffff, 431 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 432 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 433 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 434 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 435 BIT(IEEE80211_STYPE_AUTH >> 4) | 436 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 437 BIT(IEEE80211_STYPE_ACTION >> 4), 438 }, 439 [NL80211_IFTYPE_MESH_POINT] = { 440 .tx = 0xffff, 441 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 442 BIT(IEEE80211_STYPE_AUTH >> 4) | 443 BIT(IEEE80211_STYPE_DEAUTH >> 4), 444 }, 445 [NL80211_IFTYPE_P2P_DEVICE] = { 446 .tx = 0xffff, 447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 449 }, 450 }; 451 452 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 453 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 454 IEEE80211_HT_AMPDU_PARM_DENSITY, 455 456 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 457 IEEE80211_HT_CAP_MAX_AMSDU | 458 IEEE80211_HT_CAP_SGI_20 | 459 IEEE80211_HT_CAP_SGI_40 | 460 IEEE80211_HT_CAP_LDPC_CODING | 461 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 462 .mcs = { 463 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 464 0xff, 0xff, 0xff, 0xff, 0xff, }, 465 }, 466 }; 467 468 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 469 .vht_cap_info = 470 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 471 IEEE80211_VHT_CAP_SHORT_GI_80 | 472 IEEE80211_VHT_CAP_SHORT_GI_160 | 473 IEEE80211_VHT_CAP_RXSTBC_1 | 474 IEEE80211_VHT_CAP_RXSTBC_2 | 475 IEEE80211_VHT_CAP_RXSTBC_3 | 476 IEEE80211_VHT_CAP_RXSTBC_4 | 477 IEEE80211_VHT_CAP_TXSTBC | 478 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 479 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 480 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 481 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 482 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 483 .supp_mcs = { 484 .rx_mcs_map = cpu_to_le16(~0), 485 .tx_mcs_map = cpu_to_le16(~0), 486 }, 487 }; 488 489 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 490 const struct ieee80211_ops *ops, 491 const char *requested_name) 492 { 493 struct ieee80211_local *local; 494 int priv_size, i; 495 struct wiphy *wiphy; 496 bool use_chanctx; 497 498 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 499 !ops->add_interface || !ops->remove_interface || 500 !ops->configure_filter)) 501 return NULL; 502 503 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 504 return NULL; 505 506 /* check all or no channel context operations exist */ 507 i = !!ops->add_chanctx + !!ops->remove_chanctx + 508 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 509 !!ops->unassign_vif_chanctx; 510 if (WARN_ON(i != 0 && i != 5)) 511 return NULL; 512 use_chanctx = i == 5; 513 514 /* Ensure 32-byte alignment of our private data and hw private data. 515 * We use the wiphy priv data for both our ieee80211_local and for 516 * the driver's private data 517 * 518 * In memory it'll be like this: 519 * 520 * +-------------------------+ 521 * | struct wiphy | 522 * +-------------------------+ 523 * | struct ieee80211_local | 524 * +-------------------------+ 525 * | driver's private data | 526 * +-------------------------+ 527 * 528 */ 529 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 530 531 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 532 533 if (!wiphy) 534 return NULL; 535 536 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 537 538 wiphy->privid = mac80211_wiphy_privid; 539 540 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 541 WIPHY_FLAG_4ADDR_AP | 542 WIPHY_FLAG_4ADDR_STATION | 543 WIPHY_FLAG_REPORTS_OBSS | 544 WIPHY_FLAG_OFFCHAN_TX; 545 546 if (ops->remain_on_channel) 547 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 548 549 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 550 NL80211_FEATURE_SAE | 551 NL80211_FEATURE_HT_IBSS | 552 NL80211_FEATURE_VIF_TXPOWER | 553 NL80211_FEATURE_MAC_ON_CREATE | 554 NL80211_FEATURE_USERSPACE_MPM | 555 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 556 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 557 wiphy_ext_feature_set(wiphy, 558 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 559 560 if (!ops->hw_scan) 561 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 562 NL80211_FEATURE_AP_SCAN; 563 564 565 if (!ops->set_key) 566 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 567 568 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 569 570 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 571 572 local = wiphy_priv(wiphy); 573 574 if (sta_info_init(local)) 575 goto err_free; 576 577 local->hw.wiphy = wiphy; 578 579 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 580 581 local->ops = ops; 582 local->use_chanctx = use_chanctx; 583 584 /* set up some defaults */ 585 local->hw.queues = 1; 586 local->hw.max_rates = 1; 587 local->hw.max_report_rates = 0; 588 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 589 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 590 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 591 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 592 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 593 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 594 IEEE80211_RADIOTAP_MCS_HAVE_GI | 595 IEEE80211_RADIOTAP_MCS_HAVE_BW; 596 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 597 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 598 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 599 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 600 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 601 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 602 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 603 604 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 605 606 wiphy->extended_capabilities = local->ext_capa; 607 wiphy->extended_capabilities_mask = local->ext_capa; 608 wiphy->extended_capabilities_len = 609 ARRAY_SIZE(local->ext_capa); 610 611 INIT_LIST_HEAD(&local->interfaces); 612 INIT_LIST_HEAD(&local->mon_list); 613 614 __hw_addr_init(&local->mc_list); 615 616 mutex_init(&local->iflist_mtx); 617 mutex_init(&local->mtx); 618 619 mutex_init(&local->key_mtx); 620 spin_lock_init(&local->filter_lock); 621 spin_lock_init(&local->rx_path_lock); 622 spin_lock_init(&local->queue_stop_reason_lock); 623 624 INIT_LIST_HEAD(&local->chanctx_list); 625 mutex_init(&local->chanctx_mtx); 626 627 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 628 629 INIT_WORK(&local->restart_work, ieee80211_restart_work); 630 631 INIT_WORK(&local->radar_detected_work, 632 ieee80211_dfs_radar_detected_work); 633 634 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 635 local->smps_mode = IEEE80211_SMPS_OFF; 636 637 INIT_WORK(&local->dynamic_ps_enable_work, 638 ieee80211_dynamic_ps_enable_work); 639 INIT_WORK(&local->dynamic_ps_disable_work, 640 ieee80211_dynamic_ps_disable_work); 641 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 642 643 INIT_WORK(&local->sched_scan_stopped_work, 644 ieee80211_sched_scan_stopped_work); 645 646 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 647 648 spin_lock_init(&local->ack_status_lock); 649 idr_init(&local->ack_status_frames); 650 651 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 652 skb_queue_head_init(&local->pending[i]); 653 atomic_set(&local->agg_queue_stop[i], 0); 654 } 655 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 656 (unsigned long)local); 657 658 tasklet_init(&local->tasklet, 659 ieee80211_tasklet_handler, 660 (unsigned long) local); 661 662 skb_queue_head_init(&local->skb_queue); 663 skb_queue_head_init(&local->skb_queue_unreliable); 664 skb_queue_head_init(&local->skb_queue_tdls_chsw); 665 666 ieee80211_alloc_led_names(local); 667 668 ieee80211_roc_setup(local); 669 670 local->hw.radiotap_timestamp.units_pos = -1; 671 local->hw.radiotap_timestamp.accuracy = -1; 672 673 return &local->hw; 674 err_free: 675 wiphy_free(wiphy); 676 return NULL; 677 } 678 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 679 680 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 681 { 682 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 683 IS_ERR(local->wep_rx_tfm)); 684 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 685 int n_suites = 0, r = 0, w = 0; 686 u32 *suites; 687 static const u32 cipher_suites[] = { 688 /* keep WEP first, it may be removed below */ 689 WLAN_CIPHER_SUITE_WEP40, 690 WLAN_CIPHER_SUITE_WEP104, 691 WLAN_CIPHER_SUITE_TKIP, 692 WLAN_CIPHER_SUITE_CCMP, 693 WLAN_CIPHER_SUITE_CCMP_256, 694 WLAN_CIPHER_SUITE_GCMP, 695 WLAN_CIPHER_SUITE_GCMP_256, 696 697 /* keep last -- depends on hw flags! */ 698 WLAN_CIPHER_SUITE_AES_CMAC, 699 WLAN_CIPHER_SUITE_BIP_CMAC_256, 700 WLAN_CIPHER_SUITE_BIP_GMAC_128, 701 WLAN_CIPHER_SUITE_BIP_GMAC_256, 702 }; 703 704 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 705 local->hw.wiphy->cipher_suites) { 706 /* If the driver advertises, or doesn't support SW crypto, 707 * we only need to remove WEP if necessary. 708 */ 709 if (have_wep) 710 return 0; 711 712 /* well if it has _no_ ciphers ... fine */ 713 if (!local->hw.wiphy->n_cipher_suites) 714 return 0; 715 716 /* Driver provides cipher suites, but we need to exclude WEP */ 717 suites = kmemdup(local->hw.wiphy->cipher_suites, 718 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 719 GFP_KERNEL); 720 if (!suites) 721 return -ENOMEM; 722 723 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 724 u32 suite = local->hw.wiphy->cipher_suites[r]; 725 726 if (suite == WLAN_CIPHER_SUITE_WEP40 || 727 suite == WLAN_CIPHER_SUITE_WEP104) 728 continue; 729 suites[w++] = suite; 730 } 731 } else if (!local->hw.cipher_schemes) { 732 /* If the driver doesn't have cipher schemes, there's nothing 733 * else to do other than assign the (software supported and 734 * perhaps offloaded) cipher suites. 735 */ 736 local->hw.wiphy->cipher_suites = cipher_suites; 737 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 738 739 if (!have_mfp) 740 local->hw.wiphy->n_cipher_suites -= 4; 741 742 if (!have_wep) { 743 local->hw.wiphy->cipher_suites += 2; 744 local->hw.wiphy->n_cipher_suites -= 2; 745 } 746 747 /* not dynamically allocated, so just return */ 748 return 0; 749 } else { 750 const struct ieee80211_cipher_scheme *cs; 751 752 cs = local->hw.cipher_schemes; 753 754 /* Driver specifies cipher schemes only (but not cipher suites 755 * including the schemes) 756 * 757 * We start counting ciphers defined by schemes, TKIP, CCMP, 758 * CCMP-256, GCMP, and GCMP-256 759 */ 760 n_suites = local->hw.n_cipher_schemes + 5; 761 762 /* check if we have WEP40 and WEP104 */ 763 if (have_wep) 764 n_suites += 2; 765 766 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 767 * BIP-GMAC-256 768 */ 769 if (have_mfp) 770 n_suites += 4; 771 772 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 773 if (!suites) 774 return -ENOMEM; 775 776 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 777 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 778 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 779 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 780 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 781 782 if (have_wep) { 783 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 784 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 785 } 786 787 if (have_mfp) { 788 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 789 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 790 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 791 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 792 } 793 794 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 795 suites[w++] = cs[r].cipher; 796 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 797 kfree(suites); 798 return -EINVAL; 799 } 800 } 801 } 802 803 local->hw.wiphy->cipher_suites = suites; 804 local->hw.wiphy->n_cipher_suites = w; 805 local->wiphy_ciphers_allocated = true; 806 807 return 0; 808 } 809 810 int ieee80211_register_hw(struct ieee80211_hw *hw) 811 { 812 struct ieee80211_local *local = hw_to_local(hw); 813 int result, i; 814 enum nl80211_band band; 815 int channels, max_bitrates; 816 bool supp_ht, supp_vht; 817 netdev_features_t feature_whitelist; 818 struct cfg80211_chan_def dflt_chandef = {}; 819 820 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 821 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 822 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 823 return -EINVAL; 824 825 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 826 (!local->ops->tdls_channel_switch || 827 !local->ops->tdls_cancel_channel_switch || 828 !local->ops->tdls_recv_channel_switch)) 829 return -EOPNOTSUPP; 830 831 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 832 !local->ops->set_frag_threshold)) 833 return -EINVAL; 834 835 if (WARN_ON(local->hw.wiphy->interface_modes & 836 BIT(NL80211_IFTYPE_NAN) && 837 (!local->ops->start_nan || !local->ops->stop_nan))) 838 return -EINVAL; 839 840 #ifdef CONFIG_PM 841 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 842 return -EINVAL; 843 #endif 844 845 if (!local->use_chanctx) { 846 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 847 const struct ieee80211_iface_combination *comb; 848 849 comb = &local->hw.wiphy->iface_combinations[i]; 850 851 if (comb->num_different_channels > 1) 852 return -EINVAL; 853 } 854 } else { 855 /* 856 * WDS is currently prohibited when channel contexts are used 857 * because there's no clear definition of which channel WDS 858 * type interfaces use 859 */ 860 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 861 return -EINVAL; 862 863 /* DFS is not supported with multi-channel combinations yet */ 864 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 865 const struct ieee80211_iface_combination *comb; 866 867 comb = &local->hw.wiphy->iface_combinations[i]; 868 869 if (comb->radar_detect_widths && 870 comb->num_different_channels > 1) 871 return -EINVAL; 872 } 873 } 874 875 /* Only HW csum features are currently compatible with mac80211 */ 876 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 877 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 878 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM; 879 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 880 return -EINVAL; 881 882 if (hw->max_report_rates == 0) 883 hw->max_report_rates = hw->max_rates; 884 885 local->rx_chains = 1; 886 887 /* 888 * generic code guarantees at least one band, 889 * set this very early because much code assumes 890 * that hw.conf.channel is assigned 891 */ 892 channels = 0; 893 max_bitrates = 0; 894 supp_ht = false; 895 supp_vht = false; 896 for (band = 0; band < NUM_NL80211_BANDS; band++) { 897 struct ieee80211_supported_band *sband; 898 899 sband = local->hw.wiphy->bands[band]; 900 if (!sband) 901 continue; 902 903 if (!dflt_chandef.chan) { 904 cfg80211_chandef_create(&dflt_chandef, 905 &sband->channels[0], 906 NL80211_CHAN_NO_HT); 907 /* init channel we're on */ 908 if (!local->use_chanctx && !local->_oper_chandef.chan) { 909 local->hw.conf.chandef = dflt_chandef; 910 local->_oper_chandef = dflt_chandef; 911 } 912 local->monitor_chandef = dflt_chandef; 913 } 914 915 channels += sband->n_channels; 916 917 if (max_bitrates < sband->n_bitrates) 918 max_bitrates = sband->n_bitrates; 919 supp_ht = supp_ht || sband->ht_cap.ht_supported; 920 supp_vht = supp_vht || sband->vht_cap.vht_supported; 921 922 if (!sband->ht_cap.ht_supported) 923 continue; 924 925 /* TODO: consider VHT for RX chains, hopefully it's the same */ 926 local->rx_chains = 927 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 928 local->rx_chains); 929 930 /* no need to mask, SM_PS_DISABLED has all bits set */ 931 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 932 IEEE80211_HT_CAP_SM_PS_SHIFT; 933 } 934 935 /* if low-level driver supports AP, we also support VLAN. 936 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 937 * based on their support to transmit SW encrypted packets. 938 */ 939 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 940 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 941 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 942 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 943 } 944 945 /* mac80211 always supports monitor */ 946 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 947 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 948 949 /* mac80211 doesn't support more than one IBSS interface right now */ 950 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 951 const struct ieee80211_iface_combination *c; 952 int j; 953 954 c = &hw->wiphy->iface_combinations[i]; 955 956 for (j = 0; j < c->n_limits; j++) 957 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 958 c->limits[j].max > 1) 959 return -EINVAL; 960 } 961 962 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 963 sizeof(void *) * channels, GFP_KERNEL); 964 if (!local->int_scan_req) 965 return -ENOMEM; 966 967 for (band = 0; band < NUM_NL80211_BANDS; band++) { 968 if (!local->hw.wiphy->bands[band]) 969 continue; 970 local->int_scan_req->rates[band] = (u32) -1; 971 } 972 973 #ifndef CONFIG_MAC80211_MESH 974 /* mesh depends on Kconfig, but drivers should set it if they want */ 975 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 976 #endif 977 978 /* if the underlying driver supports mesh, mac80211 will (at least) 979 * provide routing of mesh authentication frames to userspace */ 980 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 981 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 982 983 /* mac80211 supports control port protocol changing */ 984 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 985 986 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 987 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 988 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 989 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 990 if (hw->max_signal <= 0) { 991 result = -EINVAL; 992 goto fail_wiphy_register; 993 } 994 } 995 996 /* 997 * Calculate scan IE length -- we need this to alloc 998 * memory and to subtract from the driver limit. It 999 * includes the DS Params, (extended) supported rates, and HT 1000 * information -- SSID is the driver's responsibility. 1001 */ 1002 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1003 3 /* DS Params */; 1004 if (supp_ht) 1005 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1006 1007 if (supp_vht) 1008 local->scan_ies_len += 1009 2 + sizeof(struct ieee80211_vht_cap); 1010 1011 if (!local->ops->hw_scan) { 1012 /* For hw_scan, driver needs to set these up. */ 1013 local->hw.wiphy->max_scan_ssids = 4; 1014 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1015 } 1016 1017 /* 1018 * If the driver supports any scan IEs, then assume the 1019 * limit includes the IEs mac80211 will add, otherwise 1020 * leave it at zero and let the driver sort it out; we 1021 * still pass our IEs to the driver but userspace will 1022 * not be allowed to in that case. 1023 */ 1024 if (local->hw.wiphy->max_scan_ie_len) 1025 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1026 1027 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1028 local->hw.n_cipher_schemes)); 1029 1030 result = ieee80211_init_cipher_suites(local); 1031 if (result < 0) 1032 goto fail_wiphy_register; 1033 1034 if (!local->ops->remain_on_channel) 1035 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1036 1037 /* mac80211 based drivers don't support internal TDLS setup */ 1038 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1039 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1040 1041 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1042 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1043 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1044 1045 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1046 1047 result = wiphy_register(local->hw.wiphy); 1048 if (result < 0) 1049 goto fail_wiphy_register; 1050 1051 /* 1052 * We use the number of queues for feature tests (QoS, HT) internally 1053 * so restrict them appropriately. 1054 */ 1055 if (hw->queues > IEEE80211_MAX_QUEUES) 1056 hw->queues = IEEE80211_MAX_QUEUES; 1057 1058 local->workqueue = 1059 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1060 if (!local->workqueue) { 1061 result = -ENOMEM; 1062 goto fail_workqueue; 1063 } 1064 1065 /* 1066 * The hardware needs headroom for sending the frame, 1067 * and we need some headroom for passing the frame to monitor 1068 * interfaces, but never both at the same time. 1069 */ 1070 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1071 IEEE80211_TX_STATUS_HEADROOM); 1072 1073 debugfs_hw_add(local); 1074 1075 /* 1076 * if the driver doesn't specify a max listen interval we 1077 * use 5 which should be a safe default 1078 */ 1079 if (local->hw.max_listen_interval == 0) 1080 local->hw.max_listen_interval = 5; 1081 1082 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1083 1084 local->dynamic_ps_forced_timeout = -1; 1085 1086 if (!local->hw.max_nan_de_entries) 1087 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1088 1089 result = ieee80211_wep_init(local); 1090 if (result < 0) 1091 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1092 result); 1093 1094 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1095 1096 ieee80211_led_init(local); 1097 1098 rtnl_lock(); 1099 1100 result = ieee80211_init_rate_ctrl_alg(local, 1101 hw->rate_control_algorithm); 1102 if (result < 0) { 1103 wiphy_debug(local->hw.wiphy, 1104 "Failed to initialize rate control algorithm\n"); 1105 goto fail_rate; 1106 } 1107 1108 /* add one default STA interface if supported */ 1109 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1110 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1111 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1112 NL80211_IFTYPE_STATION, NULL); 1113 if (result) 1114 wiphy_warn(local->hw.wiphy, 1115 "Failed to add default virtual iface\n"); 1116 } 1117 1118 rtnl_unlock(); 1119 1120 result = ieee80211_txq_setup_flows(local); 1121 if (result) 1122 goto fail_flows; 1123 1124 #ifdef CONFIG_INET 1125 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1126 result = register_inetaddr_notifier(&local->ifa_notifier); 1127 if (result) 1128 goto fail_ifa; 1129 #endif 1130 1131 #if IS_ENABLED(CONFIG_IPV6) 1132 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1133 result = register_inet6addr_notifier(&local->ifa6_notifier); 1134 if (result) 1135 goto fail_ifa6; 1136 #endif 1137 1138 return 0; 1139 1140 #if IS_ENABLED(CONFIG_IPV6) 1141 fail_ifa6: 1142 #ifdef CONFIG_INET 1143 unregister_inetaddr_notifier(&local->ifa_notifier); 1144 #endif 1145 #endif 1146 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1147 fail_ifa: 1148 #endif 1149 ieee80211_txq_teardown_flows(local); 1150 fail_flows: 1151 rtnl_lock(); 1152 rate_control_deinitialize(local); 1153 ieee80211_remove_interfaces(local); 1154 fail_rate: 1155 rtnl_unlock(); 1156 ieee80211_led_exit(local); 1157 ieee80211_wep_free(local); 1158 destroy_workqueue(local->workqueue); 1159 fail_workqueue: 1160 wiphy_unregister(local->hw.wiphy); 1161 fail_wiphy_register: 1162 if (local->wiphy_ciphers_allocated) 1163 kfree(local->hw.wiphy->cipher_suites); 1164 kfree(local->int_scan_req); 1165 return result; 1166 } 1167 EXPORT_SYMBOL(ieee80211_register_hw); 1168 1169 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1170 { 1171 struct ieee80211_local *local = hw_to_local(hw); 1172 1173 tasklet_kill(&local->tx_pending_tasklet); 1174 tasklet_kill(&local->tasklet); 1175 1176 #ifdef CONFIG_INET 1177 unregister_inetaddr_notifier(&local->ifa_notifier); 1178 #endif 1179 #if IS_ENABLED(CONFIG_IPV6) 1180 unregister_inet6addr_notifier(&local->ifa6_notifier); 1181 #endif 1182 1183 rtnl_lock(); 1184 1185 /* 1186 * At this point, interface list manipulations are fine 1187 * because the driver cannot be handing us frames any 1188 * more and the tasklet is killed. 1189 */ 1190 ieee80211_remove_interfaces(local); 1191 1192 rtnl_unlock(); 1193 1194 cancel_delayed_work_sync(&local->roc_work); 1195 cancel_work_sync(&local->restart_work); 1196 cancel_work_sync(&local->reconfig_filter); 1197 cancel_work_sync(&local->tdls_chsw_work); 1198 flush_work(&local->sched_scan_stopped_work); 1199 flush_work(&local->radar_detected_work); 1200 1201 ieee80211_clear_tx_pending(local); 1202 rate_control_deinitialize(local); 1203 1204 if (skb_queue_len(&local->skb_queue) || 1205 skb_queue_len(&local->skb_queue_unreliable)) 1206 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1207 skb_queue_purge(&local->skb_queue); 1208 skb_queue_purge(&local->skb_queue_unreliable); 1209 skb_queue_purge(&local->skb_queue_tdls_chsw); 1210 ieee80211_txq_teardown_flows(local); 1211 1212 destroy_workqueue(local->workqueue); 1213 wiphy_unregister(local->hw.wiphy); 1214 ieee80211_wep_free(local); 1215 ieee80211_led_exit(local); 1216 kfree(local->int_scan_req); 1217 } 1218 EXPORT_SYMBOL(ieee80211_unregister_hw); 1219 1220 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1221 { 1222 WARN_ONCE(1, "Have pending ack frames!\n"); 1223 kfree_skb(p); 1224 return 0; 1225 } 1226 1227 void ieee80211_free_hw(struct ieee80211_hw *hw) 1228 { 1229 struct ieee80211_local *local = hw_to_local(hw); 1230 1231 mutex_destroy(&local->iflist_mtx); 1232 mutex_destroy(&local->mtx); 1233 1234 if (local->wiphy_ciphers_allocated) 1235 kfree(local->hw.wiphy->cipher_suites); 1236 1237 idr_for_each(&local->ack_status_frames, 1238 ieee80211_free_ack_frame, NULL); 1239 idr_destroy(&local->ack_status_frames); 1240 1241 sta_info_stop(local); 1242 1243 ieee80211_free_led_names(local); 1244 1245 wiphy_free(local->hw.wiphy); 1246 } 1247 EXPORT_SYMBOL(ieee80211_free_hw); 1248 1249 static int __init ieee80211_init(void) 1250 { 1251 struct sk_buff *skb; 1252 int ret; 1253 1254 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1255 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1256 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1257 1258 ret = rc80211_minstrel_init(); 1259 if (ret) 1260 return ret; 1261 1262 ret = rc80211_minstrel_ht_init(); 1263 if (ret) 1264 goto err_minstrel; 1265 1266 ret = ieee80211_iface_init(); 1267 if (ret) 1268 goto err_netdev; 1269 1270 return 0; 1271 err_netdev: 1272 rc80211_minstrel_ht_exit(); 1273 err_minstrel: 1274 rc80211_minstrel_exit(); 1275 1276 return ret; 1277 } 1278 1279 static void __exit ieee80211_exit(void) 1280 { 1281 rc80211_minstrel_ht_exit(); 1282 rc80211_minstrel_exit(); 1283 1284 ieee80211s_stop(); 1285 1286 ieee80211_iface_exit(); 1287 1288 rcu_barrier(); 1289 } 1290 1291 1292 subsys_initcall(ieee80211_init); 1293 module_exit(ieee80211_exit); 1294 1295 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1296 MODULE_LICENSE("GPL"); 1297