main.c revision e943789edbb1f9de71b129d9992489eb79ed341f
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 bool scanning = false; 104 105 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 106 if (local->scan_channel) { 107 chan = local->scan_channel; 108 /* If scanning on oper channel, use whatever channel-type 109 * is currently in use. 110 */ 111 if (chan == local->_oper_channel) 112 channel_type = local->_oper_channel_type; 113 else 114 channel_type = NL80211_CHAN_NO_HT; 115 } else if (local->tmp_channel) { 116 chan = local->tmp_channel; 117 channel_type = NL80211_CHAN_NO_HT; 118 } else { 119 chan = local->_oper_channel; 120 channel_type = local->_oper_channel_type; 121 } 122 123 if (chan != local->_oper_channel || 124 channel_type != local->_oper_channel_type) 125 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 126 else 127 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 128 129 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 130 131 if (offchannel_flag || chan != local->hw.conf.channel || 132 channel_type != local->hw.conf.channel_type) { 133 local->hw.conf.channel = chan; 134 local->hw.conf.channel_type = channel_type; 135 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 136 } 137 138 if (!conf_is_ht(&local->hw.conf)) { 139 /* 140 * mac80211.h documents that this is only valid 141 * when the channel is set to an HT type, and 142 * that otherwise STATIC is used. 143 */ 144 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 145 } else if (local->hw.conf.smps_mode != local->smps_mode) { 146 local->hw.conf.smps_mode = local->smps_mode; 147 changed |= IEEE80211_CONF_CHANGE_SMPS; 148 } 149 150 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) || 151 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) || 152 test_bit(SCAN_HW_SCANNING, &local->scanning); 153 power = chan->max_power; 154 155 rcu_read_lock(); 156 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 157 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 158 continue; 159 power = min(power, sdata->vif.bss_conf.txpower); 160 } 161 rcu_read_unlock(); 162 163 if (local->hw.conf.power_level != power) { 164 changed |= IEEE80211_CONF_CHANGE_POWER; 165 local->hw.conf.power_level = power; 166 } 167 168 return changed; 169} 170 171int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 172{ 173 int ret = 0; 174 175 might_sleep(); 176 177 if (!local->use_chanctx) 178 changed |= ieee80211_hw_conf_chan(local); 179 else 180 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 181 IEEE80211_CONF_CHANGE_POWER); 182 183 if (changed && local->open_count) { 184 ret = drv_config(local, changed); 185 /* 186 * Goal: 187 * HW reconfiguration should never fail, the driver has told 188 * us what it can support so it should live up to that promise. 189 * 190 * Current status: 191 * rfkill is not integrated with mac80211 and a 192 * configuration command can thus fail if hardware rfkill 193 * is enabled 194 * 195 * FIXME: integrate rfkill with mac80211 and then add this 196 * WARN_ON() back 197 * 198 */ 199 /* WARN_ON(ret); */ 200 } 201 202 return ret; 203} 204 205void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 206 u32 changed) 207{ 208 struct ieee80211_local *local = sdata->local; 209 210 if (!changed) 211 return; 212 213 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 214} 215 216u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 217{ 218 sdata->vif.bss_conf.use_cts_prot = false; 219 sdata->vif.bss_conf.use_short_preamble = false; 220 sdata->vif.bss_conf.use_short_slot = false; 221 return BSS_CHANGED_ERP_CTS_PROT | 222 BSS_CHANGED_ERP_PREAMBLE | 223 BSS_CHANGED_ERP_SLOT; 224} 225 226static void ieee80211_tasklet_handler(unsigned long data) 227{ 228 struct ieee80211_local *local = (struct ieee80211_local *) data; 229 struct sk_buff *skb; 230 231 while ((skb = skb_dequeue(&local->skb_queue)) || 232 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 233 switch (skb->pkt_type) { 234 case IEEE80211_RX_MSG: 235 /* Clear skb->pkt_type in order to not confuse kernel 236 * netstack. */ 237 skb->pkt_type = 0; 238 ieee80211_rx(&local->hw, skb); 239 break; 240 case IEEE80211_TX_STATUS_MSG: 241 skb->pkt_type = 0; 242 ieee80211_tx_status(&local->hw, skb); 243 break; 244 default: 245 WARN(1, "mac80211: Packet is of unknown type %d\n", 246 skb->pkt_type); 247 dev_kfree_skb(skb); 248 break; 249 } 250 } 251} 252 253static void ieee80211_restart_work(struct work_struct *work) 254{ 255 struct ieee80211_local *local = 256 container_of(work, struct ieee80211_local, restart_work); 257 258 /* wait for scan work complete */ 259 flush_workqueue(local->workqueue); 260 261 mutex_lock(&local->mtx); 262 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 263 rcu_dereference_protected(local->sched_scan_sdata, 264 lockdep_is_held(&local->mtx)), 265 "%s called with hardware scan in progress\n", __func__); 266 mutex_unlock(&local->mtx); 267 268 rtnl_lock(); 269 ieee80211_scan_cancel(local); 270 ieee80211_reconfig(local); 271 rtnl_unlock(); 272} 273 274void ieee80211_restart_hw(struct ieee80211_hw *hw) 275{ 276 struct ieee80211_local *local = hw_to_local(hw); 277 278 trace_api_restart_hw(local); 279 280 wiphy_info(hw->wiphy, 281 "Hardware restart was requested\n"); 282 283 /* use this reason, ieee80211_reconfig will unblock it */ 284 ieee80211_stop_queues_by_reason(hw, 285 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 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 schedule_work(&local->restart_work); 295} 296EXPORT_SYMBOL(ieee80211_restart_hw); 297 298#ifdef CONFIG_INET 299static 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 mutex_lock(&ifmgd->mtx); 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 mutex_unlock(&ifmgd->mtx); 352 353 return NOTIFY_DONE; 354} 355#endif 356 357#if IS_ENABLED(CONFIG_IPV6) 358static 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_DONE; 385} 386#endif 387 388/* There isn't a lot of sense in it, but you can transmit anything you like */ 389static const struct ieee80211_txrx_stypes 390ieee80211_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 452static 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 .mcs = { 461 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 462 0xff, 0xff, 0xff, 0xff, 0xff, }, 463 }, 464}; 465 466static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 467 .vht_cap_info = 468 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 469 IEEE80211_VHT_CAP_SHORT_GI_80 | 470 IEEE80211_VHT_CAP_SHORT_GI_160 | 471 IEEE80211_VHT_CAP_RXSTBC_1 | 472 IEEE80211_VHT_CAP_RXSTBC_2 | 473 IEEE80211_VHT_CAP_RXSTBC_3 | 474 IEEE80211_VHT_CAP_RXSTBC_4 | 475 IEEE80211_VHT_CAP_TXSTBC | 476 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 477 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 478 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 479 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 480 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 481 .supp_mcs = { 482 .rx_mcs_map = cpu_to_le16(~0), 483 .tx_mcs_map = cpu_to_le16(~0), 484 }, 485}; 486 487static const u8 extended_capabilities[] = { 488 0, 0, 0, 0, 0, 0, 0, 489 WLAN_EXT_CAPA8_OPMODE_NOTIF, 490}; 491 492struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 493 const struct ieee80211_ops *ops) 494{ 495 struct ieee80211_local *local; 496 int priv_size, i; 497 struct wiphy *wiphy; 498 bool use_chanctx; 499 500 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 501 !ops->add_interface || !ops->remove_interface || 502 !ops->configure_filter)) 503 return NULL; 504 505 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 506 return NULL; 507 508 /* check all or no channel context operations exist */ 509 i = !!ops->add_chanctx + !!ops->remove_chanctx + 510 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 511 !!ops->unassign_vif_chanctx; 512 if (WARN_ON(i != 0 && i != 5)) 513 return NULL; 514 use_chanctx = i == 5; 515 516 /* Ensure 32-byte alignment of our private data and hw private data. 517 * We use the wiphy priv data for both our ieee80211_local and for 518 * the driver's private data 519 * 520 * In memory it'll be like this: 521 * 522 * +-------------------------+ 523 * | struct wiphy | 524 * +-------------------------+ 525 * | struct ieee80211_local | 526 * +-------------------------+ 527 * | driver's private data | 528 * +-------------------------+ 529 * 530 */ 531 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 532 533 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 534 535 if (!wiphy) 536 return NULL; 537 538 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 539 540 wiphy->privid = mac80211_wiphy_privid; 541 542 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 543 WIPHY_FLAG_4ADDR_AP | 544 WIPHY_FLAG_4ADDR_STATION | 545 WIPHY_FLAG_REPORTS_OBSS | 546 WIPHY_FLAG_OFFCHAN_TX; 547 548 wiphy->extended_capabilities = extended_capabilities; 549 wiphy->extended_capabilities_mask = extended_capabilities; 550 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 551 552 if (ops->remain_on_channel) 553 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 554 555 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 556 NL80211_FEATURE_SAE | 557 NL80211_FEATURE_HT_IBSS | 558 NL80211_FEATURE_VIF_TXPOWER | 559 NL80211_FEATURE_USERSPACE_MPM; 560 561 if (!ops->hw_scan) 562 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 563 NL80211_FEATURE_AP_SCAN; 564 565 566 if (!ops->set_key) 567 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 568 569 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 570 571 local = wiphy_priv(wiphy); 572 573 local->hw.wiphy = wiphy; 574 575 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 576 577 local->ops = ops; 578 local->use_chanctx = use_chanctx; 579 580 /* set up some defaults */ 581 local->hw.queues = 1; 582 local->hw.max_rates = 1; 583 local->hw.max_report_rates = 0; 584 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 585 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 586 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 587 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 588 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 589 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 590 IEEE80211_RADIOTAP_MCS_HAVE_GI | 591 IEEE80211_RADIOTAP_MCS_HAVE_BW; 592 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 593 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 594 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 595 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 596 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 597 598 INIT_LIST_HEAD(&local->interfaces); 599 600 __hw_addr_init(&local->mc_list); 601 602 mutex_init(&local->iflist_mtx); 603 mutex_init(&local->mtx); 604 605 mutex_init(&local->key_mtx); 606 spin_lock_init(&local->filter_lock); 607 spin_lock_init(&local->rx_path_lock); 608 spin_lock_init(&local->queue_stop_reason_lock); 609 610 INIT_LIST_HEAD(&local->chanctx_list); 611 mutex_init(&local->chanctx_mtx); 612 613 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 614 615 INIT_WORK(&local->restart_work, ieee80211_restart_work); 616 617 INIT_WORK(&local->radar_detected_work, 618 ieee80211_dfs_radar_detected_work); 619 620 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 621 local->smps_mode = IEEE80211_SMPS_OFF; 622 623 INIT_WORK(&local->dynamic_ps_enable_work, 624 ieee80211_dynamic_ps_enable_work); 625 INIT_WORK(&local->dynamic_ps_disable_work, 626 ieee80211_dynamic_ps_disable_work); 627 setup_timer(&local->dynamic_ps_timer, 628 ieee80211_dynamic_ps_timer, (unsigned long) local); 629 630 INIT_WORK(&local->sched_scan_stopped_work, 631 ieee80211_sched_scan_stopped_work); 632 633 spin_lock_init(&local->ack_status_lock); 634 idr_init(&local->ack_status_frames); 635 636 sta_info_init(local); 637 638 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 639 skb_queue_head_init(&local->pending[i]); 640 atomic_set(&local->agg_queue_stop[i], 0); 641 } 642 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 643 (unsigned long)local); 644 645 tasklet_init(&local->tasklet, 646 ieee80211_tasklet_handler, 647 (unsigned long) local); 648 649 skb_queue_head_init(&local->skb_queue); 650 skb_queue_head_init(&local->skb_queue_unreliable); 651 652 ieee80211_led_names(local); 653 654 ieee80211_roc_setup(local); 655 656 return &local->hw; 657} 658EXPORT_SYMBOL(ieee80211_alloc_hw); 659 660int ieee80211_register_hw(struct ieee80211_hw *hw) 661{ 662 struct ieee80211_local *local = hw_to_local(hw); 663 int result, i; 664 enum ieee80211_band band; 665 int channels, max_bitrates; 666 bool supp_ht, supp_vht; 667 netdev_features_t feature_whitelist; 668 static const u32 cipher_suites[] = { 669 /* keep WEP first, it may be removed below */ 670 WLAN_CIPHER_SUITE_WEP40, 671 WLAN_CIPHER_SUITE_WEP104, 672 WLAN_CIPHER_SUITE_TKIP, 673 WLAN_CIPHER_SUITE_CCMP, 674 675 /* keep last -- depends on hw flags! */ 676 WLAN_CIPHER_SUITE_AES_CMAC 677 }; 678 679 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 680 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 681 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 682 return -EINVAL; 683 684#ifdef CONFIG_PM 685 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 686 (!local->ops->suspend || !local->ops->resume)) 687 return -EINVAL; 688#endif 689 690 if (!local->use_chanctx) { 691 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 692 const struct ieee80211_iface_combination *comb; 693 694 comb = &local->hw.wiphy->iface_combinations[i]; 695 696 if (comb->num_different_channels > 1) 697 return -EINVAL; 698 } 699 } else { 700 /* 701 * WDS is currently prohibited when channel contexts are used 702 * because there's no clear definition of which channel WDS 703 * type interfaces use 704 */ 705 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 706 return -EINVAL; 707 708 /* DFS currently not supported with channel context drivers */ 709 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 710 const struct ieee80211_iface_combination *comb; 711 712 comb = &local->hw.wiphy->iface_combinations[i]; 713 714 if (comb->radar_detect_widths) 715 return -EINVAL; 716 } 717 } 718 719 /* Only HW csum features are currently compatible with mac80211 */ 720 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 721 NETIF_F_HW_CSUM; 722 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 723 return -EINVAL; 724 725 if (hw->max_report_rates == 0) 726 hw->max_report_rates = hw->max_rates; 727 728 local->rx_chains = 1; 729 730 /* 731 * generic code guarantees at least one band, 732 * set this very early because much code assumes 733 * that hw.conf.channel is assigned 734 */ 735 channels = 0; 736 max_bitrates = 0; 737 supp_ht = false; 738 supp_vht = false; 739 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 740 struct ieee80211_supported_band *sband; 741 742 sband = local->hw.wiphy->bands[band]; 743 if (!sband) 744 continue; 745 if (!local->use_chanctx && !local->_oper_channel) { 746 /* init channel we're on */ 747 local->hw.conf.channel = 748 local->_oper_channel = &sband->channels[0]; 749 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 750 } 751 cfg80211_chandef_create(&local->monitor_chandef, 752 &sband->channels[0], 753 NL80211_CHAN_NO_HT); 754 channels += sband->n_channels; 755 756 if (max_bitrates < sband->n_bitrates) 757 max_bitrates = sband->n_bitrates; 758 supp_ht = supp_ht || sband->ht_cap.ht_supported; 759 supp_vht = supp_vht || sband->vht_cap.vht_supported; 760 761 if (sband->ht_cap.ht_supported) 762 local->rx_chains = 763 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 764 local->rx_chains); 765 766 /* TODO: consider VHT for RX chains, hopefully it's the same */ 767 } 768 769 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 770 sizeof(void *) * channels, GFP_KERNEL); 771 if (!local->int_scan_req) 772 return -ENOMEM; 773 774 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 775 if (!local->hw.wiphy->bands[band]) 776 continue; 777 local->int_scan_req->rates[band] = (u32) -1; 778 } 779 780 /* if low-level driver supports AP, we also support VLAN */ 781 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 782 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 783 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 784 } 785 786 /* mac80211 always supports monitor */ 787 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 788 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 789 790 /* mac80211 doesn't support more than one IBSS interface right now */ 791 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 792 const struct ieee80211_iface_combination *c; 793 int j; 794 795 c = &hw->wiphy->iface_combinations[i]; 796 797 for (j = 0; j < c->n_limits; j++) 798 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 799 c->limits[j].max > 1) 800 return -EINVAL; 801 } 802 803#ifndef CONFIG_MAC80211_MESH 804 /* mesh depends on Kconfig, but drivers should set it if they want */ 805 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 806#endif 807 808 /* if the underlying driver supports mesh, mac80211 will (at least) 809 * provide routing of mesh authentication frames to userspace */ 810 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 811 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 812 813 /* mac80211 supports control port protocol changing */ 814 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 815 816 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 817 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 818 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 819 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 820 821 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 822 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 823 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 824 825 /* 826 * Calculate scan IE length -- we need this to alloc 827 * memory and to subtract from the driver limit. It 828 * includes the DS Params, (extended) supported rates, and HT 829 * information -- SSID is the driver's responsibility. 830 */ 831 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 832 3 /* DS Params */; 833 if (supp_ht) 834 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 835 836 if (supp_vht) { 837 local->scan_ies_len += 838 2 + sizeof(struct ieee80211_vht_cap); 839 840 /* 841 * (for now at least), drivers wanting to use VHT must 842 * support channel contexts, as they contain all the 843 * necessary VHT information and the global hw config 844 * doesn't (yet) 845 */ 846 if (WARN_ON(!local->use_chanctx)) { 847 result = -EINVAL; 848 goto fail_wiphy_register; 849 } 850 } 851 852 if (!local->ops->hw_scan) { 853 /* For hw_scan, driver needs to set these up. */ 854 local->hw.wiphy->max_scan_ssids = 4; 855 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 856 } 857 858 /* 859 * If the driver supports any scan IEs, then assume the 860 * limit includes the IEs mac80211 will add, otherwise 861 * leave it at zero and let the driver sort it out; we 862 * still pass our IEs to the driver but userspace will 863 * not be allowed to in that case. 864 */ 865 if (local->hw.wiphy->max_scan_ie_len) 866 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 867 868 /* Set up cipher suites unless driver already did */ 869 if (!local->hw.wiphy->cipher_suites) { 870 local->hw.wiphy->cipher_suites = cipher_suites; 871 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 872 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 873 local->hw.wiphy->n_cipher_suites--; 874 } 875 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 876 if (local->hw.wiphy->cipher_suites == cipher_suites) { 877 local->hw.wiphy->cipher_suites += 2; 878 local->hw.wiphy->n_cipher_suites -= 2; 879 } else { 880 u32 *suites; 881 int r, w = 0; 882 883 /* Filter out WEP */ 884 885 suites = kmemdup( 886 local->hw.wiphy->cipher_suites, 887 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 888 GFP_KERNEL); 889 if (!suites) { 890 result = -ENOMEM; 891 goto fail_wiphy_register; 892 } 893 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 894 u32 suite = local->hw.wiphy->cipher_suites[r]; 895 if (suite == WLAN_CIPHER_SUITE_WEP40 || 896 suite == WLAN_CIPHER_SUITE_WEP104) 897 continue; 898 suites[w++] = suite; 899 } 900 local->hw.wiphy->cipher_suites = suites; 901 local->hw.wiphy->n_cipher_suites = w; 902 local->wiphy_ciphers_allocated = true; 903 } 904 } 905 906 if (!local->ops->remain_on_channel) 907 local->hw.wiphy->max_remain_on_channel_duration = 5000; 908 909 if (local->ops->sched_scan_start) 910 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 911 912 /* mac80211 based drivers don't support internal TDLS setup */ 913 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 914 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 915 916 result = wiphy_register(local->hw.wiphy); 917 if (result < 0) 918 goto fail_wiphy_register; 919 920 /* 921 * We use the number of queues for feature tests (QoS, HT) internally 922 * so restrict them appropriately. 923 */ 924 if (hw->queues > IEEE80211_MAX_QUEUES) 925 hw->queues = IEEE80211_MAX_QUEUES; 926 927 local->workqueue = 928 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 929 if (!local->workqueue) { 930 result = -ENOMEM; 931 goto fail_workqueue; 932 } 933 934 /* 935 * The hardware needs headroom for sending the frame, 936 * and we need some headroom for passing the frame to monitor 937 * interfaces, but never both at the same time. 938 */ 939 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 940 IEEE80211_TX_STATUS_HEADROOM); 941 942 debugfs_hw_add(local); 943 944 /* 945 * if the driver doesn't specify a max listen interval we 946 * use 5 which should be a safe default 947 */ 948 if (local->hw.max_listen_interval == 0) 949 local->hw.max_listen_interval = 5; 950 951 local->hw.conf.listen_interval = local->hw.max_listen_interval; 952 953 local->dynamic_ps_forced_timeout = -1; 954 955 result = ieee80211_wep_init(local); 956 if (result < 0) 957 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 958 result); 959 960 ieee80211_led_init(local); 961 962 rtnl_lock(); 963 964 result = ieee80211_init_rate_ctrl_alg(local, 965 hw->rate_control_algorithm); 966 if (result < 0) { 967 wiphy_debug(local->hw.wiphy, 968 "Failed to initialize rate control algorithm\n"); 969 goto fail_rate; 970 } 971 972 /* add one default STA interface if supported */ 973 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 974 result = ieee80211_if_add(local, "wlan%d", NULL, 975 NL80211_IFTYPE_STATION, NULL); 976 if (result) 977 wiphy_warn(local->hw.wiphy, 978 "Failed to add default virtual iface\n"); 979 } 980 981 rtnl_unlock(); 982 983 local->network_latency_notifier.notifier_call = 984 ieee80211_max_network_latency; 985 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 986 &local->network_latency_notifier); 987 if (result) { 988 rtnl_lock(); 989 goto fail_pm_qos; 990 } 991 992#ifdef CONFIG_INET 993 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 994 result = register_inetaddr_notifier(&local->ifa_notifier); 995 if (result) 996 goto fail_ifa; 997#endif 998 999#if IS_ENABLED(CONFIG_IPV6) 1000 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1001 result = register_inet6addr_notifier(&local->ifa6_notifier); 1002 if (result) 1003 goto fail_ifa6; 1004#endif 1005 1006 return 0; 1007 1008#if IS_ENABLED(CONFIG_IPV6) 1009 fail_ifa6: 1010#ifdef CONFIG_INET 1011 unregister_inetaddr_notifier(&local->ifa_notifier); 1012#endif 1013#endif 1014#if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1015 fail_ifa: 1016 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1017 &local->network_latency_notifier); 1018 rtnl_lock(); 1019#endif 1020 fail_pm_qos: 1021 ieee80211_led_exit(local); 1022 ieee80211_remove_interfaces(local); 1023 fail_rate: 1024 rtnl_unlock(); 1025 ieee80211_wep_free(local); 1026 sta_info_stop(local); 1027 destroy_workqueue(local->workqueue); 1028 fail_workqueue: 1029 wiphy_unregister(local->hw.wiphy); 1030 fail_wiphy_register: 1031 if (local->wiphy_ciphers_allocated) 1032 kfree(local->hw.wiphy->cipher_suites); 1033 kfree(local->int_scan_req); 1034 return result; 1035} 1036EXPORT_SYMBOL(ieee80211_register_hw); 1037 1038void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1039{ 1040 struct ieee80211_local *local = hw_to_local(hw); 1041 1042 tasklet_kill(&local->tx_pending_tasklet); 1043 tasklet_kill(&local->tasklet); 1044 1045 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1046 &local->network_latency_notifier); 1047#ifdef CONFIG_INET 1048 unregister_inetaddr_notifier(&local->ifa_notifier); 1049#endif 1050#if IS_ENABLED(CONFIG_IPV6) 1051 unregister_inet6addr_notifier(&local->ifa6_notifier); 1052#endif 1053 1054 rtnl_lock(); 1055 1056 /* 1057 * At this point, interface list manipulations are fine 1058 * because the driver cannot be handing us frames any 1059 * more and the tasklet is killed. 1060 */ 1061 ieee80211_remove_interfaces(local); 1062 1063 rtnl_unlock(); 1064 1065 cancel_work_sync(&local->restart_work); 1066 cancel_work_sync(&local->reconfig_filter); 1067 1068 ieee80211_clear_tx_pending(local); 1069 rate_control_deinitialize(local); 1070 1071 if (skb_queue_len(&local->skb_queue) || 1072 skb_queue_len(&local->skb_queue_unreliable)) 1073 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1074 skb_queue_purge(&local->skb_queue); 1075 skb_queue_purge(&local->skb_queue_unreliable); 1076 1077 destroy_workqueue(local->workqueue); 1078 wiphy_unregister(local->hw.wiphy); 1079 sta_info_stop(local); 1080 ieee80211_wep_free(local); 1081 ieee80211_led_exit(local); 1082 kfree(local->int_scan_req); 1083} 1084EXPORT_SYMBOL(ieee80211_unregister_hw); 1085 1086static int ieee80211_free_ack_frame(int id, void *p, void *data) 1087{ 1088 WARN_ONCE(1, "Have pending ack frames!\n"); 1089 kfree_skb(p); 1090 return 0; 1091} 1092 1093void ieee80211_free_hw(struct ieee80211_hw *hw) 1094{ 1095 struct ieee80211_local *local = hw_to_local(hw); 1096 1097 mutex_destroy(&local->iflist_mtx); 1098 mutex_destroy(&local->mtx); 1099 1100 if (local->wiphy_ciphers_allocated) 1101 kfree(local->hw.wiphy->cipher_suites); 1102 1103 idr_for_each(&local->ack_status_frames, 1104 ieee80211_free_ack_frame, NULL); 1105 idr_destroy(&local->ack_status_frames); 1106 1107 wiphy_free(local->hw.wiphy); 1108} 1109EXPORT_SYMBOL(ieee80211_free_hw); 1110 1111static int __init ieee80211_init(void) 1112{ 1113 struct sk_buff *skb; 1114 int ret; 1115 1116 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1117 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1118 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1119 1120 ret = rc80211_minstrel_init(); 1121 if (ret) 1122 return ret; 1123 1124 ret = rc80211_minstrel_ht_init(); 1125 if (ret) 1126 goto err_minstrel; 1127 1128 ret = rc80211_pid_init(); 1129 if (ret) 1130 goto err_pid; 1131 1132 ret = ieee80211_iface_init(); 1133 if (ret) 1134 goto err_netdev; 1135 1136 return 0; 1137 err_netdev: 1138 rc80211_pid_exit(); 1139 err_pid: 1140 rc80211_minstrel_ht_exit(); 1141 err_minstrel: 1142 rc80211_minstrel_exit(); 1143 1144 return ret; 1145} 1146 1147static void __exit ieee80211_exit(void) 1148{ 1149 rc80211_pid_exit(); 1150 rc80211_minstrel_ht_exit(); 1151 rc80211_minstrel_exit(); 1152 1153 ieee80211s_stop(); 1154 1155 ieee80211_iface_exit(); 1156 1157 rcu_barrier(); 1158} 1159 1160 1161subsys_initcall(ieee80211_init); 1162module_exit(ieee80211_exit); 1163 1164MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1165MODULE_LICENSE("GPL"); 1166