main.c revision 445ea4e83ec50668cc9ad7e5cf96d242f19165e8
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 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <net/mac80211.h> 12#include <linux/module.h> 13#include <linux/init.h> 14#include <linux/netdevice.h> 15#include <linux/types.h> 16#include <linux/slab.h> 17#include <linux/skbuff.h> 18#include <linux/etherdevice.h> 19#include <linux/if_arp.h> 20#include <linux/rtnetlink.h> 21#include <linux/bitmap.h> 22#include <linux/pm_qos.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 "cfg.h" 35#include "debugfs.h" 36 37void ieee80211_configure_filter(struct ieee80211_local *local) 38{ 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_promiscs)) 44 new_flags |= FIF_PROMISC_IN_BSS; 45 46 if (atomic_read(&local->iff_allmultis)) 47 new_flags |= FIF_ALLMULTI; 48 49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 51 new_flags |= FIF_BCN_PRBRESP_PROMISC; 52 53 if (local->fif_probe_req || local->probe_req_reg) 54 new_flags |= FIF_PROBE_REQ; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85} 86 87static void ieee80211_reconfig_filter(struct work_struct *work) 88{ 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93} 94 95static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96{ 97 struct ieee80211_sub_if_data *sdata; 98 struct ieee80211_channel *chan; 99 u32 changed = 0; 100 int power; 101 enum nl80211_channel_type channel_type; 102 u32 offchannel_flag; 103 104 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 105 if (local->scan_channel) { 106 chan = local->scan_channel; 107 /* If scanning on oper channel, use whatever channel-type 108 * is currently in use. 109 */ 110 if (chan == local->_oper_channel) 111 channel_type = local->_oper_channel_type; 112 else 113 channel_type = NL80211_CHAN_NO_HT; 114 } else if (local->tmp_channel) { 115 chan = local->tmp_channel; 116 channel_type = NL80211_CHAN_NO_HT; 117 } else { 118 chan = local->_oper_channel; 119 channel_type = local->_oper_channel_type; 120 } 121 122 if (chan != local->_oper_channel || 123 channel_type != local->_oper_channel_type) 124 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 125 else 126 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 127 128 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 129 130 if (offchannel_flag || chan != local->hw.conf.channel || 131 channel_type != local->hw.conf.channel_type) { 132 local->hw.conf.channel = chan; 133 local->hw.conf.channel_type = channel_type; 134 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 135 } 136 137 if (!conf_is_ht(&local->hw.conf)) { 138 /* 139 * mac80211.h documents that this is only valid 140 * when the channel is set to an HT type, and 141 * that otherwise STATIC is used. 142 */ 143 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 144 } else if (local->hw.conf.smps_mode != local->smps_mode) { 145 local->hw.conf.smps_mode = local->smps_mode; 146 changed |= IEEE80211_CONF_CHANGE_SMPS; 147 } 148 149 power = chan->max_power; 150 151 rcu_read_lock(); 152 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 153 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 154 continue; 155 power = min(power, sdata->vif.bss_conf.txpower); 156 } 157 rcu_read_unlock(); 158 159 if (local->hw.conf.power_level != power) { 160 changed |= IEEE80211_CONF_CHANGE_POWER; 161 local->hw.conf.power_level = power; 162 } 163 164 return changed; 165} 166 167int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 168{ 169 int ret = 0; 170 171 might_sleep(); 172 173 if (!local->use_chanctx) 174 changed |= ieee80211_hw_conf_chan(local); 175 else 176 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 177 IEEE80211_CONF_CHANGE_POWER); 178 179 if (changed && local->open_count) { 180 ret = drv_config(local, changed); 181 /* 182 * Goal: 183 * HW reconfiguration should never fail, the driver has told 184 * us what it can support so it should live up to that promise. 185 * 186 * Current status: 187 * rfkill is not integrated with mac80211 and a 188 * configuration command can thus fail if hardware rfkill 189 * is enabled 190 * 191 * FIXME: integrate rfkill with mac80211 and then add this 192 * WARN_ON() back 193 * 194 */ 195 /* WARN_ON(ret); */ 196 } 197 198 return ret; 199} 200 201void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 202 u32 changed) 203{ 204 struct ieee80211_local *local = sdata->local; 205 206 if (!changed) 207 return; 208 209 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 210} 211 212u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 213{ 214 sdata->vif.bss_conf.use_cts_prot = false; 215 sdata->vif.bss_conf.use_short_preamble = false; 216 sdata->vif.bss_conf.use_short_slot = false; 217 return BSS_CHANGED_ERP_CTS_PROT | 218 BSS_CHANGED_ERP_PREAMBLE | 219 BSS_CHANGED_ERP_SLOT; 220} 221 222static void ieee80211_tasklet_handler(unsigned long data) 223{ 224 struct ieee80211_local *local = (struct ieee80211_local *) data; 225 struct sk_buff *skb; 226 227 while ((skb = skb_dequeue(&local->skb_queue)) || 228 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 229 switch (skb->pkt_type) { 230 case IEEE80211_RX_MSG: 231 /* Clear skb->pkt_type in order to not confuse kernel 232 * netstack. */ 233 skb->pkt_type = 0; 234 ieee80211_rx(&local->hw, skb); 235 break; 236 case IEEE80211_TX_STATUS_MSG: 237 skb->pkt_type = 0; 238 ieee80211_tx_status(&local->hw, skb); 239 break; 240 default: 241 WARN(1, "mac80211: Packet is of unknown type %d\n", 242 skb->pkt_type); 243 dev_kfree_skb(skb); 244 break; 245 } 246 } 247} 248 249static void ieee80211_restart_work(struct work_struct *work) 250{ 251 struct ieee80211_local *local = 252 container_of(work, struct ieee80211_local, restart_work); 253 254 /* wait for scan work complete */ 255 flush_workqueue(local->workqueue); 256 257 mutex_lock(&local->mtx); 258 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 259 rcu_dereference_protected(local->sched_scan_sdata, 260 lockdep_is_held(&local->mtx)), 261 "%s called with hardware scan in progress\n", __func__); 262 mutex_unlock(&local->mtx); 263 264 rtnl_lock(); 265 ieee80211_scan_cancel(local); 266 ieee80211_reconfig(local); 267 rtnl_unlock(); 268} 269 270void ieee80211_restart_hw(struct ieee80211_hw *hw) 271{ 272 struct ieee80211_local *local = hw_to_local(hw); 273 274 trace_api_restart_hw(local); 275 276 wiphy_info(hw->wiphy, 277 "Hardware restart was requested\n"); 278 279 /* use this reason, ieee80211_reconfig will unblock it */ 280 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 281 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 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 schedule_work(&local->restart_work); 291} 292EXPORT_SYMBOL(ieee80211_restart_hw); 293 294#ifdef CONFIG_INET 295static 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 mutex_lock(&ifmgd->mtx); 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 mutex_unlock(&ifmgd->mtx); 348 349 return NOTIFY_DONE; 350} 351#endif 352 353#if IS_ENABLED(CONFIG_IPV6) 354static 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_DONE; 381} 382#endif 383 384/* There isn't a lot of sense in it, but you can transmit anything you like */ 385static const struct ieee80211_txrx_stypes 386ieee80211_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 448static 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 .mcs = { 457 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 458 0xff, 0xff, 0xff, 0xff, 0xff, }, 459 }, 460}; 461 462static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 463 .vht_cap_info = 464 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 465 IEEE80211_VHT_CAP_SHORT_GI_80 | 466 IEEE80211_VHT_CAP_SHORT_GI_160 | 467 IEEE80211_VHT_CAP_RXSTBC_1 | 468 IEEE80211_VHT_CAP_RXSTBC_2 | 469 IEEE80211_VHT_CAP_RXSTBC_3 | 470 IEEE80211_VHT_CAP_RXSTBC_4 | 471 IEEE80211_VHT_CAP_TXSTBC | 472 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 473 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 474 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 475 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 476 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 477 .supp_mcs = { 478 .rx_mcs_map = cpu_to_le16(~0), 479 .tx_mcs_map = cpu_to_le16(~0), 480 }, 481}; 482 483static const u8 extended_capabilities[] = { 484 0, 0, 0, 0, 0, 0, 0, 485 WLAN_EXT_CAPA8_OPMODE_NOTIF, 486}; 487 488struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 489 const struct ieee80211_ops *ops) 490{ 491 struct ieee80211_local *local; 492 int priv_size, i; 493 struct wiphy *wiphy; 494 bool use_chanctx; 495 496 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 497 !ops->add_interface || !ops->remove_interface || 498 !ops->configure_filter)) 499 return NULL; 500 501 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 502 return NULL; 503 504 /* check all or no channel context operations exist */ 505 i = !!ops->add_chanctx + !!ops->remove_chanctx + 506 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 507 !!ops->unassign_vif_chanctx; 508 if (WARN_ON(i != 0 && i != 5)) 509 return NULL; 510 use_chanctx = i == 5; 511 512 /* Ensure 32-byte alignment of our private data and hw private data. 513 * We use the wiphy priv data for both our ieee80211_local and for 514 * the driver's private data 515 * 516 * In memory it'll be like this: 517 * 518 * +-------------------------+ 519 * | struct wiphy | 520 * +-------------------------+ 521 * | struct ieee80211_local | 522 * +-------------------------+ 523 * | driver's private data | 524 * +-------------------------+ 525 * 526 */ 527 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 528 529 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 530 531 if (!wiphy) 532 return NULL; 533 534 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 535 536 wiphy->privid = mac80211_wiphy_privid; 537 538 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 539 WIPHY_FLAG_4ADDR_AP | 540 WIPHY_FLAG_4ADDR_STATION | 541 WIPHY_FLAG_REPORTS_OBSS | 542 WIPHY_FLAG_OFFCHAN_TX; 543 544 wiphy->extended_capabilities = extended_capabilities; 545 wiphy->extended_capabilities_mask = extended_capabilities; 546 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 547 548 if (ops->remain_on_channel) 549 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 550 551 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 552 NL80211_FEATURE_SAE | 553 NL80211_FEATURE_HT_IBSS | 554 NL80211_FEATURE_VIF_TXPOWER | 555 NL80211_FEATURE_USERSPACE_MPM; 556 557 if (!ops->hw_scan) 558 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 559 NL80211_FEATURE_AP_SCAN; 560 561 562 if (!ops->set_key) 563 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 564 565 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 566 567 local = wiphy_priv(wiphy); 568 569 local->hw.wiphy = wiphy; 570 571 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 572 573 local->ops = ops; 574 local->use_chanctx = use_chanctx; 575 576 /* set up some defaults */ 577 local->hw.queues = 1; 578 local->hw.max_rates = 1; 579 local->hw.max_report_rates = 0; 580 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 581 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 582 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 583 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 584 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 585 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 586 IEEE80211_RADIOTAP_MCS_HAVE_GI | 587 IEEE80211_RADIOTAP_MCS_HAVE_BW; 588 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 589 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 590 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 591 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 592 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 593 594 INIT_LIST_HEAD(&local->interfaces); 595 596 __hw_addr_init(&local->mc_list); 597 598 mutex_init(&local->iflist_mtx); 599 mutex_init(&local->mtx); 600 601 mutex_init(&local->key_mtx); 602 spin_lock_init(&local->filter_lock); 603 spin_lock_init(&local->rx_path_lock); 604 spin_lock_init(&local->queue_stop_reason_lock); 605 606 INIT_LIST_HEAD(&local->chanctx_list); 607 mutex_init(&local->chanctx_mtx); 608 609 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 610 611 INIT_WORK(&local->restart_work, ieee80211_restart_work); 612 613 INIT_WORK(&local->radar_detected_work, 614 ieee80211_dfs_radar_detected_work); 615 616 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 617 local->smps_mode = IEEE80211_SMPS_OFF; 618 619 INIT_WORK(&local->dynamic_ps_enable_work, 620 ieee80211_dynamic_ps_enable_work); 621 INIT_WORK(&local->dynamic_ps_disable_work, 622 ieee80211_dynamic_ps_disable_work); 623 setup_timer(&local->dynamic_ps_timer, 624 ieee80211_dynamic_ps_timer, (unsigned long) local); 625 626 INIT_WORK(&local->sched_scan_stopped_work, 627 ieee80211_sched_scan_stopped_work); 628 629 spin_lock_init(&local->ack_status_lock); 630 idr_init(&local->ack_status_frames); 631 632 sta_info_init(local); 633 634 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 635 skb_queue_head_init(&local->pending[i]); 636 atomic_set(&local->agg_queue_stop[i], 0); 637 } 638 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 639 (unsigned long)local); 640 641 tasklet_init(&local->tasklet, 642 ieee80211_tasklet_handler, 643 (unsigned long) local); 644 645 skb_queue_head_init(&local->skb_queue); 646 skb_queue_head_init(&local->skb_queue_unreliable); 647 648 ieee80211_led_names(local); 649 650 ieee80211_roc_setup(local); 651 652 return &local->hw; 653} 654EXPORT_SYMBOL(ieee80211_alloc_hw); 655 656int ieee80211_register_hw(struct ieee80211_hw *hw) 657{ 658 struct ieee80211_local *local = hw_to_local(hw); 659 int result, i; 660 enum ieee80211_band band; 661 int channels, max_bitrates; 662 bool supp_ht, supp_vht; 663 netdev_features_t feature_whitelist; 664 static const u32 cipher_suites[] = { 665 /* keep WEP first, it may be removed below */ 666 WLAN_CIPHER_SUITE_WEP40, 667 WLAN_CIPHER_SUITE_WEP104, 668 WLAN_CIPHER_SUITE_TKIP, 669 WLAN_CIPHER_SUITE_CCMP, 670 671 /* keep last -- depends on hw flags! */ 672 WLAN_CIPHER_SUITE_AES_CMAC 673 }; 674 675 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 676 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 677 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 678 return -EINVAL; 679 680#ifdef CONFIG_PM 681 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 682 (!local->ops->suspend || !local->ops->resume)) 683 return -EINVAL; 684#endif 685 686 if (!local->use_chanctx) { 687 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 688 const struct ieee80211_iface_combination *comb; 689 690 comb = &local->hw.wiphy->iface_combinations[i]; 691 692 if (comb->num_different_channels > 1) 693 return -EINVAL; 694 } 695 } else { 696 /* 697 * WDS is currently prohibited when channel contexts are used 698 * because there's no clear definition of which channel WDS 699 * type interfaces use 700 */ 701 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 702 return -EINVAL; 703 704 /* DFS currently not supported with channel context drivers */ 705 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 706 const struct ieee80211_iface_combination *comb; 707 708 comb = &local->hw.wiphy->iface_combinations[i]; 709 710 if (comb->radar_detect_widths) 711 return -EINVAL; 712 } 713 } 714 715 /* Only HW csum features are currently compatible with mac80211 */ 716 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 717 NETIF_F_HW_CSUM; 718 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 719 return -EINVAL; 720 721 if (hw->max_report_rates == 0) 722 hw->max_report_rates = hw->max_rates; 723 724 local->rx_chains = 1; 725 726 /* 727 * generic code guarantees at least one band, 728 * set this very early because much code assumes 729 * that hw.conf.channel is assigned 730 */ 731 channels = 0; 732 max_bitrates = 0; 733 supp_ht = false; 734 supp_vht = false; 735 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 736 struct ieee80211_supported_band *sband; 737 738 sband = local->hw.wiphy->bands[band]; 739 if (!sband) 740 continue; 741 if (!local->use_chanctx && !local->_oper_channel) { 742 /* init channel we're on */ 743 local->hw.conf.channel = 744 local->_oper_channel = &sband->channels[0]; 745 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 746 } 747 cfg80211_chandef_create(&local->monitor_chandef, 748 &sband->channels[0], 749 NL80211_CHAN_NO_HT); 750 channels += sband->n_channels; 751 752 if (max_bitrates < sband->n_bitrates) 753 max_bitrates = sband->n_bitrates; 754 supp_ht = supp_ht || sband->ht_cap.ht_supported; 755 supp_vht = supp_vht || sband->vht_cap.vht_supported; 756 757 if (sband->ht_cap.ht_supported) 758 local->rx_chains = 759 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 760 local->rx_chains); 761 762 /* TODO: consider VHT for RX chains, hopefully it's the same */ 763 } 764 765 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 766 sizeof(void *) * channels, GFP_KERNEL); 767 if (!local->int_scan_req) 768 return -ENOMEM; 769 770 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 771 if (!local->hw.wiphy->bands[band]) 772 continue; 773 local->int_scan_req->rates[band] = (u32) -1; 774 } 775 776 /* if low-level driver supports AP, we also support VLAN */ 777 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 778 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 779 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 780 } 781 782 /* mac80211 always supports monitor */ 783 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 784 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 785 786 /* mac80211 doesn't support more than one IBSS interface right now */ 787 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 788 const struct ieee80211_iface_combination *c; 789 int j; 790 791 c = &hw->wiphy->iface_combinations[i]; 792 793 for (j = 0; j < c->n_limits; j++) 794 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 795 c->limits[j].max > 1) 796 return -EINVAL; 797 } 798 799#ifndef CONFIG_MAC80211_MESH 800 /* mesh depends on Kconfig, but drivers should set it if they want */ 801 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 802#endif 803 804 /* if the underlying driver supports mesh, mac80211 will (at least) 805 * provide routing of mesh authentication frames to userspace */ 806 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 807 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 808 809 /* mac80211 supports control port protocol changing */ 810 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 811 812 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 813 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 814 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 815 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 816 817 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 818 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 819 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 820 821 /* 822 * Calculate scan IE length -- we need this to alloc 823 * memory and to subtract from the driver limit. It 824 * includes the DS Params, (extended) supported rates, and HT 825 * information -- SSID is the driver's responsibility. 826 */ 827 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 828 3 /* DS Params */; 829 if (supp_ht) 830 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 831 832 if (supp_vht) { 833 local->scan_ies_len += 834 2 + sizeof(struct ieee80211_vht_cap); 835 836 /* 837 * (for now at least), drivers wanting to use VHT must 838 * support channel contexts, as they contain all the 839 * necessary VHT information and the global hw config 840 * doesn't (yet) 841 */ 842 if (WARN_ON(!local->use_chanctx)) { 843 result = -EINVAL; 844 goto fail_wiphy_register; 845 } 846 } 847 848 if (!local->ops->hw_scan) { 849 /* For hw_scan, driver needs to set these up. */ 850 local->hw.wiphy->max_scan_ssids = 4; 851 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 852 } 853 854 /* 855 * If the driver supports any scan IEs, then assume the 856 * limit includes the IEs mac80211 will add, otherwise 857 * leave it at zero and let the driver sort it out; we 858 * still pass our IEs to the driver but userspace will 859 * not be allowed to in that case. 860 */ 861 if (local->hw.wiphy->max_scan_ie_len) 862 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 863 864 /* Set up cipher suites unless driver already did */ 865 if (!local->hw.wiphy->cipher_suites) { 866 local->hw.wiphy->cipher_suites = cipher_suites; 867 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 868 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 869 local->hw.wiphy->n_cipher_suites--; 870 } 871 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 872 if (local->hw.wiphy->cipher_suites == cipher_suites) { 873 local->hw.wiphy->cipher_suites += 2; 874 local->hw.wiphy->n_cipher_suites -= 2; 875 } else { 876 u32 *suites; 877 int r, w = 0; 878 879 /* Filter out WEP */ 880 881 suites = kmemdup( 882 local->hw.wiphy->cipher_suites, 883 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 884 GFP_KERNEL); 885 if (!suites) { 886 result = -ENOMEM; 887 goto fail_wiphy_register; 888 } 889 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 890 u32 suite = local->hw.wiphy->cipher_suites[r]; 891 if (suite == WLAN_CIPHER_SUITE_WEP40 || 892 suite == WLAN_CIPHER_SUITE_WEP104) 893 continue; 894 suites[w++] = suite; 895 } 896 local->hw.wiphy->cipher_suites = suites; 897 local->hw.wiphy->n_cipher_suites = w; 898 local->wiphy_ciphers_allocated = true; 899 } 900 } 901 902 if (!local->ops->remain_on_channel) 903 local->hw.wiphy->max_remain_on_channel_duration = 5000; 904 905 if (local->ops->sched_scan_start) 906 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 907 908 /* mac80211 based drivers don't support internal TDLS setup */ 909 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 910 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 911 912 result = wiphy_register(local->hw.wiphy); 913 if (result < 0) 914 goto fail_wiphy_register; 915 916 /* 917 * We use the number of queues for feature tests (QoS, HT) internally 918 * so restrict them appropriately. 919 */ 920 if (hw->queues > IEEE80211_MAX_QUEUES) 921 hw->queues = IEEE80211_MAX_QUEUES; 922 923 local->workqueue = 924 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 925 if (!local->workqueue) { 926 result = -ENOMEM; 927 goto fail_workqueue; 928 } 929 930 /* 931 * The hardware needs headroom for sending the frame, 932 * and we need some headroom for passing the frame to monitor 933 * interfaces, but never both at the same time. 934 */ 935 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 936 IEEE80211_TX_STATUS_HEADROOM); 937 938 debugfs_hw_add(local); 939 940 /* 941 * if the driver doesn't specify a max listen interval we 942 * use 5 which should be a safe default 943 */ 944 if (local->hw.max_listen_interval == 0) 945 local->hw.max_listen_interval = 5; 946 947 local->hw.conf.listen_interval = local->hw.max_listen_interval; 948 949 local->dynamic_ps_forced_timeout = -1; 950 951 result = ieee80211_wep_init(local); 952 if (result < 0) 953 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 954 result); 955 956 ieee80211_led_init(local); 957 958 rtnl_lock(); 959 960 result = ieee80211_init_rate_ctrl_alg(local, 961 hw->rate_control_algorithm); 962 if (result < 0) { 963 wiphy_debug(local->hw.wiphy, 964 "Failed to initialize rate control algorithm\n"); 965 goto fail_rate; 966 } 967 968 /* add one default STA interface if supported */ 969 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 970 result = ieee80211_if_add(local, "wlan%d", NULL, 971 NL80211_IFTYPE_STATION, NULL); 972 if (result) 973 wiphy_warn(local->hw.wiphy, 974 "Failed to add default virtual iface\n"); 975 } 976 977 rtnl_unlock(); 978 979 local->network_latency_notifier.notifier_call = 980 ieee80211_max_network_latency; 981 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 982 &local->network_latency_notifier); 983 if (result) { 984 rtnl_lock(); 985 goto fail_pm_qos; 986 } 987 988#ifdef CONFIG_INET 989 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 990 result = register_inetaddr_notifier(&local->ifa_notifier); 991 if (result) 992 goto fail_ifa; 993#endif 994 995#if IS_ENABLED(CONFIG_IPV6) 996 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 997 result = register_inet6addr_notifier(&local->ifa6_notifier); 998 if (result) 999 goto fail_ifa6; 1000#endif 1001 1002 return 0; 1003 1004#if IS_ENABLED(CONFIG_IPV6) 1005 fail_ifa6: 1006#ifdef CONFIG_INET 1007 unregister_inetaddr_notifier(&local->ifa_notifier); 1008#endif 1009#endif 1010#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1011 fail_ifa: 1012 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1013 &local->network_latency_notifier); 1014 rtnl_lock(); 1015#endif 1016 fail_pm_qos: 1017 ieee80211_led_exit(local); 1018 ieee80211_remove_interfaces(local); 1019 fail_rate: 1020 rtnl_unlock(); 1021 ieee80211_wep_free(local); 1022 sta_info_stop(local); 1023 destroy_workqueue(local->workqueue); 1024 fail_workqueue: 1025 wiphy_unregister(local->hw.wiphy); 1026 fail_wiphy_register: 1027 if (local->wiphy_ciphers_allocated) 1028 kfree(local->hw.wiphy->cipher_suites); 1029 kfree(local->int_scan_req); 1030 return result; 1031} 1032EXPORT_SYMBOL(ieee80211_register_hw); 1033 1034void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1035{ 1036 struct ieee80211_local *local = hw_to_local(hw); 1037 1038 tasklet_kill(&local->tx_pending_tasklet); 1039 tasklet_kill(&local->tasklet); 1040 1041 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1042 &local->network_latency_notifier); 1043#ifdef CONFIG_INET 1044 unregister_inetaddr_notifier(&local->ifa_notifier); 1045#endif 1046#if IS_ENABLED(CONFIG_IPV6) 1047 unregister_inet6addr_notifier(&local->ifa6_notifier); 1048#endif 1049 1050 rtnl_lock(); 1051 1052 /* 1053 * At this point, interface list manipulations are fine 1054 * because the driver cannot be handing us frames any 1055 * more and the tasklet is killed. 1056 */ 1057 ieee80211_remove_interfaces(local); 1058 1059 rtnl_unlock(); 1060 1061 cancel_work_sync(&local->restart_work); 1062 cancel_work_sync(&local->reconfig_filter); 1063 1064 ieee80211_clear_tx_pending(local); 1065 rate_control_deinitialize(local); 1066 1067 if (skb_queue_len(&local->skb_queue) || 1068 skb_queue_len(&local->skb_queue_unreliable)) 1069 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1070 skb_queue_purge(&local->skb_queue); 1071 skb_queue_purge(&local->skb_queue_unreliable); 1072 1073 destroy_workqueue(local->workqueue); 1074 wiphy_unregister(local->hw.wiphy); 1075 sta_info_stop(local); 1076 ieee80211_wep_free(local); 1077 ieee80211_led_exit(local); 1078 kfree(local->int_scan_req); 1079} 1080EXPORT_SYMBOL(ieee80211_unregister_hw); 1081 1082static int ieee80211_free_ack_frame(int id, void *p, void *data) 1083{ 1084 WARN_ONCE(1, "Have pending ack frames!\n"); 1085 kfree_skb(p); 1086 return 0; 1087} 1088 1089void ieee80211_free_hw(struct ieee80211_hw *hw) 1090{ 1091 struct ieee80211_local *local = hw_to_local(hw); 1092 1093 mutex_destroy(&local->iflist_mtx); 1094 mutex_destroy(&local->mtx); 1095 1096 if (local->wiphy_ciphers_allocated) 1097 kfree(local->hw.wiphy->cipher_suites); 1098 1099 idr_for_each(&local->ack_status_frames, 1100 ieee80211_free_ack_frame, NULL); 1101 idr_destroy(&local->ack_status_frames); 1102 1103 wiphy_free(local->hw.wiphy); 1104} 1105EXPORT_SYMBOL(ieee80211_free_hw); 1106 1107static int __init ieee80211_init(void) 1108{ 1109 struct sk_buff *skb; 1110 int ret; 1111 1112 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1113 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1114 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1115 1116 ret = rc80211_minstrel_init(); 1117 if (ret) 1118 return ret; 1119 1120 ret = rc80211_minstrel_ht_init(); 1121 if (ret) 1122 goto err_minstrel; 1123 1124 ret = rc80211_pid_init(); 1125 if (ret) 1126 goto err_pid; 1127 1128 ret = ieee80211_iface_init(); 1129 if (ret) 1130 goto err_netdev; 1131 1132 return 0; 1133 err_netdev: 1134 rc80211_pid_exit(); 1135 err_pid: 1136 rc80211_minstrel_ht_exit(); 1137 err_minstrel: 1138 rc80211_minstrel_exit(); 1139 1140 return ret; 1141} 1142 1143static void __exit ieee80211_exit(void) 1144{ 1145 rc80211_pid_exit(); 1146 rc80211_minstrel_ht_exit(); 1147 rc80211_minstrel_exit(); 1148 1149 ieee80211s_stop(); 1150 1151 ieee80211_iface_exit(); 1152 1153 rcu_barrier(); 1154} 1155 1156 1157subsys_initcall(ieee80211_init); 1158module_exit(ieee80211_exit); 1159 1160MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1161MODULE_LICENSE("GPL"); 1162