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 37 void 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 87 static 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 95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96 { 97 struct ieee80211_sub_if_data *sdata; 98 struct cfg80211_chan_def chandef = {}; 99 u32 changed = 0; 100 int power; 101 u32 offchannel_flag; 102 103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 104 105 if (local->scan_chandef.chan) { 106 chandef = local->scan_chandef; 107 } else if (local->tmp_channel) { 108 chandef.chan = local->tmp_channel; 109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 110 chandef.center_freq1 = chandef.chan->center_freq; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d MHz width:%d center: %d/%d MHz", 116 chandef.chan->center_freq, chandef.width, 117 chandef.center_freq1, chandef.center_freq2); 118 119 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 121 else 122 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 123 124 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 125 126 if (offchannel_flag || 127 !cfg80211_chandef_identical(&local->hw.conf.chandef, 128 &local->_oper_chandef)) { 129 local->hw.conf.chandef = chandef; 130 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 131 } 132 133 if (!conf_is_ht(&local->hw.conf)) { 134 /* 135 * mac80211.h documents that this is only valid 136 * when the channel is set to an HT type, and 137 * that otherwise STATIC is used. 138 */ 139 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 140 } else if (local->hw.conf.smps_mode != local->smps_mode) { 141 local->hw.conf.smps_mode = local->smps_mode; 142 changed |= IEEE80211_CONF_CHANGE_SMPS; 143 } 144 145 power = ieee80211_chandef_max_power(&chandef); 146 147 rcu_read_lock(); 148 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 149 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 150 continue; 151 power = min(power, sdata->vif.bss_conf.txpower); 152 } 153 rcu_read_unlock(); 154 155 if (local->hw.conf.power_level != power) { 156 changed |= IEEE80211_CONF_CHANGE_POWER; 157 local->hw.conf.power_level = power; 158 } 159 160 return changed; 161 } 162 163 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 164 { 165 int ret = 0; 166 167 might_sleep(); 168 169 if (!local->use_chanctx) 170 changed |= ieee80211_hw_conf_chan(local); 171 else 172 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 173 IEEE80211_CONF_CHANGE_POWER); 174 175 if (changed && local->open_count) { 176 ret = drv_config(local, changed); 177 /* 178 * Goal: 179 * HW reconfiguration should never fail, the driver has told 180 * us what it can support so it should live up to that promise. 181 * 182 * Current status: 183 * rfkill is not integrated with mac80211 and a 184 * configuration command can thus fail if hardware rfkill 185 * is enabled 186 * 187 * FIXME: integrate rfkill with mac80211 and then add this 188 * WARN_ON() back 189 * 190 */ 191 /* WARN_ON(ret); */ 192 } 193 194 return ret; 195 } 196 197 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 198 u32 changed) 199 { 200 struct ieee80211_local *local = sdata->local; 201 202 if (!changed) 203 return; 204 205 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 206 } 207 208 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 209 { 210 sdata->vif.bss_conf.use_cts_prot = false; 211 sdata->vif.bss_conf.use_short_preamble = false; 212 sdata->vif.bss_conf.use_short_slot = false; 213 return BSS_CHANGED_ERP_CTS_PROT | 214 BSS_CHANGED_ERP_PREAMBLE | 215 BSS_CHANGED_ERP_SLOT; 216 } 217 218 static void ieee80211_tasklet_handler(unsigned long data) 219 { 220 struct ieee80211_local *local = (struct ieee80211_local *) data; 221 struct sk_buff *skb; 222 223 while ((skb = skb_dequeue(&local->skb_queue)) || 224 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 225 switch (skb->pkt_type) { 226 case IEEE80211_RX_MSG: 227 /* Clear skb->pkt_type in order to not confuse kernel 228 * netstack. */ 229 skb->pkt_type = 0; 230 ieee80211_rx(&local->hw, skb); 231 break; 232 case IEEE80211_TX_STATUS_MSG: 233 skb->pkt_type = 0; 234 ieee80211_tx_status(&local->hw, skb); 235 break; 236 default: 237 WARN(1, "mac80211: Packet is of unknown type %d\n", 238 skb->pkt_type); 239 dev_kfree_skb(skb); 240 break; 241 } 242 } 243 } 244 245 static void ieee80211_restart_work(struct work_struct *work) 246 { 247 struct ieee80211_local *local = 248 container_of(work, struct ieee80211_local, restart_work); 249 250 /* wait for scan work complete */ 251 flush_workqueue(local->workqueue); 252 253 mutex_lock(&local->mtx); 254 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 255 rcu_dereference_protected(local->sched_scan_sdata, 256 lockdep_is_held(&local->mtx)), 257 "%s called with hardware scan in progress\n", __func__); 258 mutex_unlock(&local->mtx); 259 260 rtnl_lock(); 261 ieee80211_scan_cancel(local); 262 ieee80211_reconfig(local); 263 rtnl_unlock(); 264 } 265 266 void ieee80211_restart_hw(struct ieee80211_hw *hw) 267 { 268 struct ieee80211_local *local = hw_to_local(hw); 269 270 trace_api_restart_hw(local); 271 272 wiphy_info(hw->wiphy, 273 "Hardware restart was requested\n"); 274 275 /* use this reason, ieee80211_reconfig will unblock it */ 276 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 277 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 278 279 /* 280 * Stop all Rx during the reconfig. We don't want state changes 281 * or driver callbacks while this is in progress. 282 */ 283 local->in_reconfig = true; 284 barrier(); 285 286 schedule_work(&local->restart_work); 287 } 288 EXPORT_SYMBOL(ieee80211_restart_hw); 289 290 #ifdef CONFIG_INET 291 static int ieee80211_ifa_changed(struct notifier_block *nb, 292 unsigned long data, void *arg) 293 { 294 struct in_ifaddr *ifa = arg; 295 struct ieee80211_local *local = 296 container_of(nb, struct ieee80211_local, 297 ifa_notifier); 298 struct net_device *ndev = ifa->ifa_dev->dev; 299 struct wireless_dev *wdev = ndev->ieee80211_ptr; 300 struct in_device *idev; 301 struct ieee80211_sub_if_data *sdata; 302 struct ieee80211_bss_conf *bss_conf; 303 struct ieee80211_if_managed *ifmgd; 304 int c = 0; 305 306 /* Make sure it's our interface that got changed */ 307 if (!wdev) 308 return NOTIFY_DONE; 309 310 if (wdev->wiphy != local->hw.wiphy) 311 return NOTIFY_DONE; 312 313 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 314 bss_conf = &sdata->vif.bss_conf; 315 316 /* ARP filtering is only supported in managed mode */ 317 if (sdata->vif.type != NL80211_IFTYPE_STATION) 318 return NOTIFY_DONE; 319 320 idev = __in_dev_get_rtnl(sdata->dev); 321 if (!idev) 322 return NOTIFY_DONE; 323 324 ifmgd = &sdata->u.mgd; 325 sdata_lock(sdata); 326 327 /* Copy the addresses to the bss_conf list */ 328 ifa = idev->ifa_list; 329 while (ifa) { 330 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 331 bss_conf->arp_addr_list[c] = ifa->ifa_address; 332 ifa = ifa->ifa_next; 333 c++; 334 } 335 336 bss_conf->arp_addr_cnt = c; 337 338 /* Configure driver only if associated (which also implies it is up) */ 339 if (ifmgd->associated) 340 ieee80211_bss_info_change_notify(sdata, 341 BSS_CHANGED_ARP_FILTER); 342 343 sdata_unlock(sdata); 344 345 return NOTIFY_DONE; 346 } 347 #endif 348 349 #if IS_ENABLED(CONFIG_IPV6) 350 static int ieee80211_ifa6_changed(struct notifier_block *nb, 351 unsigned long data, void *arg) 352 { 353 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 354 struct inet6_dev *idev = ifa->idev; 355 struct net_device *ndev = ifa->idev->dev; 356 struct ieee80211_local *local = 357 container_of(nb, struct ieee80211_local, ifa6_notifier); 358 struct wireless_dev *wdev = ndev->ieee80211_ptr; 359 struct ieee80211_sub_if_data *sdata; 360 361 /* Make sure it's our interface that got changed */ 362 if (!wdev || wdev->wiphy != local->hw.wiphy) 363 return NOTIFY_DONE; 364 365 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 366 367 /* 368 * For now only support station mode. This is mostly because 369 * doing AP would have to handle AP_VLAN in some way ... 370 */ 371 if (sdata->vif.type != NL80211_IFTYPE_STATION) 372 return NOTIFY_DONE; 373 374 drv_ipv6_addr_change(local, sdata, idev); 375 376 return NOTIFY_DONE; 377 } 378 #endif 379 380 /* There isn't a lot of sense in it, but you can transmit anything you like */ 381 static const struct ieee80211_txrx_stypes 382 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 383 [NL80211_IFTYPE_ADHOC] = { 384 .tx = 0xffff, 385 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 386 BIT(IEEE80211_STYPE_AUTH >> 4) | 387 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 388 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 389 }, 390 [NL80211_IFTYPE_STATION] = { 391 .tx = 0xffff, 392 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 393 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 394 }, 395 [NL80211_IFTYPE_AP] = { 396 .tx = 0xffff, 397 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 398 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 399 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 400 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 401 BIT(IEEE80211_STYPE_AUTH >> 4) | 402 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 403 BIT(IEEE80211_STYPE_ACTION >> 4), 404 }, 405 [NL80211_IFTYPE_AP_VLAN] = { 406 /* copy AP */ 407 .tx = 0xffff, 408 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 409 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 410 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 411 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 412 BIT(IEEE80211_STYPE_AUTH >> 4) | 413 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 414 BIT(IEEE80211_STYPE_ACTION >> 4), 415 }, 416 [NL80211_IFTYPE_P2P_CLIENT] = { 417 .tx = 0xffff, 418 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 419 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 420 }, 421 [NL80211_IFTYPE_P2P_GO] = { 422 .tx = 0xffff, 423 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 424 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 425 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 426 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 427 BIT(IEEE80211_STYPE_AUTH >> 4) | 428 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 429 BIT(IEEE80211_STYPE_ACTION >> 4), 430 }, 431 [NL80211_IFTYPE_MESH_POINT] = { 432 .tx = 0xffff, 433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 434 BIT(IEEE80211_STYPE_AUTH >> 4) | 435 BIT(IEEE80211_STYPE_DEAUTH >> 4), 436 }, 437 [NL80211_IFTYPE_P2P_DEVICE] = { 438 .tx = 0xffff, 439 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 440 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 441 }, 442 }; 443 444 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 445 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 446 IEEE80211_HT_AMPDU_PARM_DENSITY, 447 448 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 449 IEEE80211_HT_CAP_MAX_AMSDU | 450 IEEE80211_HT_CAP_SGI_20 | 451 IEEE80211_HT_CAP_SGI_40), 452 .mcs = { 453 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 454 0xff, 0xff, 0xff, 0xff, 0xff, }, 455 }, 456 }; 457 458 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 459 .vht_cap_info = 460 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 461 IEEE80211_VHT_CAP_SHORT_GI_80 | 462 IEEE80211_VHT_CAP_SHORT_GI_160 | 463 IEEE80211_VHT_CAP_RXSTBC_1 | 464 IEEE80211_VHT_CAP_RXSTBC_2 | 465 IEEE80211_VHT_CAP_RXSTBC_3 | 466 IEEE80211_VHT_CAP_RXSTBC_4 | 467 IEEE80211_VHT_CAP_TXSTBC | 468 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 469 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 470 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 471 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 472 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 473 .supp_mcs = { 474 .rx_mcs_map = cpu_to_le16(~0), 475 .tx_mcs_map = cpu_to_le16(~0), 476 }, 477 }; 478 479 static const u8 extended_capabilities[] = { 480 0, 0, 0, 0, 0, 0, 0, 481 WLAN_EXT_CAPA8_OPMODE_NOTIF, 482 }; 483 484 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 485 const struct ieee80211_ops *ops) 486 { 487 struct ieee80211_local *local; 488 int priv_size, i; 489 struct wiphy *wiphy; 490 bool use_chanctx; 491 492 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 493 !ops->add_interface || !ops->remove_interface || 494 !ops->configure_filter)) 495 return NULL; 496 497 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 498 return NULL; 499 500 /* check all or no channel context operations exist */ 501 i = !!ops->add_chanctx + !!ops->remove_chanctx + 502 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 503 !!ops->unassign_vif_chanctx; 504 if (WARN_ON(i != 0 && i != 5)) 505 return NULL; 506 use_chanctx = i == 5; 507 508 /* Ensure 32-byte alignment of our private data and hw private data. 509 * We use the wiphy priv data for both our ieee80211_local and for 510 * the driver's private data 511 * 512 * In memory it'll be like this: 513 * 514 * +-------------------------+ 515 * | struct wiphy | 516 * +-------------------------+ 517 * | struct ieee80211_local | 518 * +-------------------------+ 519 * | driver's private data | 520 * +-------------------------+ 521 * 522 */ 523 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 524 525 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 526 527 if (!wiphy) 528 return NULL; 529 530 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 531 532 wiphy->privid = mac80211_wiphy_privid; 533 534 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 535 WIPHY_FLAG_4ADDR_AP | 536 WIPHY_FLAG_4ADDR_STATION | 537 WIPHY_FLAG_REPORTS_OBSS | 538 WIPHY_FLAG_OFFCHAN_TX; 539 540 wiphy->extended_capabilities = extended_capabilities; 541 wiphy->extended_capabilities_mask = extended_capabilities; 542 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 543 544 if (ops->remain_on_channel) 545 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 546 547 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 548 NL80211_FEATURE_SAE | 549 NL80211_FEATURE_HT_IBSS | 550 NL80211_FEATURE_VIF_TXPOWER | 551 NL80211_FEATURE_USERSPACE_MPM; 552 553 if (!ops->hw_scan) 554 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 555 NL80211_FEATURE_AP_SCAN; 556 557 558 if (!ops->set_key) 559 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 560 561 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 562 563 local = wiphy_priv(wiphy); 564 565 local->hw.wiphy = wiphy; 566 567 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 568 569 local->ops = ops; 570 local->use_chanctx = use_chanctx; 571 572 /* set up some defaults */ 573 local->hw.queues = 1; 574 local->hw.max_rates = 1; 575 local->hw.max_report_rates = 0; 576 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 577 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 578 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 579 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 580 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 581 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 582 IEEE80211_RADIOTAP_MCS_HAVE_GI | 583 IEEE80211_RADIOTAP_MCS_HAVE_BW; 584 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 585 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 586 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 587 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 588 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 589 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 590 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 591 592 INIT_LIST_HEAD(&local->interfaces); 593 594 __hw_addr_init(&local->mc_list); 595 596 mutex_init(&local->iflist_mtx); 597 mutex_init(&local->mtx); 598 599 mutex_init(&local->key_mtx); 600 spin_lock_init(&local->filter_lock); 601 spin_lock_init(&local->rx_path_lock); 602 spin_lock_init(&local->queue_stop_reason_lock); 603 604 INIT_LIST_HEAD(&local->chanctx_list); 605 mutex_init(&local->chanctx_mtx); 606 607 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 608 609 INIT_WORK(&local->restart_work, ieee80211_restart_work); 610 611 INIT_WORK(&local->radar_detected_work, 612 ieee80211_dfs_radar_detected_work); 613 614 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 615 local->smps_mode = IEEE80211_SMPS_OFF; 616 617 INIT_WORK(&local->dynamic_ps_enable_work, 618 ieee80211_dynamic_ps_enable_work); 619 INIT_WORK(&local->dynamic_ps_disable_work, 620 ieee80211_dynamic_ps_disable_work); 621 setup_timer(&local->dynamic_ps_timer, 622 ieee80211_dynamic_ps_timer, (unsigned long) local); 623 624 INIT_WORK(&local->sched_scan_stopped_work, 625 ieee80211_sched_scan_stopped_work); 626 627 spin_lock_init(&local->ack_status_lock); 628 idr_init(&local->ack_status_frames); 629 630 sta_info_init(local); 631 632 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 633 skb_queue_head_init(&local->pending[i]); 634 atomic_set(&local->agg_queue_stop[i], 0); 635 } 636 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 637 (unsigned long)local); 638 639 tasklet_init(&local->tasklet, 640 ieee80211_tasklet_handler, 641 (unsigned long) local); 642 643 skb_queue_head_init(&local->skb_queue); 644 skb_queue_head_init(&local->skb_queue_unreliable); 645 646 ieee80211_led_names(local); 647 648 ieee80211_roc_setup(local); 649 650 return &local->hw; 651 } 652 EXPORT_SYMBOL(ieee80211_alloc_hw); 653 654 int ieee80211_register_hw(struct ieee80211_hw *hw) 655 { 656 struct ieee80211_local *local = hw_to_local(hw); 657 int result, i; 658 enum ieee80211_band band; 659 int channels, max_bitrates; 660 bool supp_ht, supp_vht; 661 netdev_features_t feature_whitelist; 662 struct cfg80211_chan_def dflt_chandef = {}; 663 static const u32 cipher_suites[] = { 664 /* keep WEP first, it may be removed below */ 665 WLAN_CIPHER_SUITE_WEP40, 666 WLAN_CIPHER_SUITE_WEP104, 667 WLAN_CIPHER_SUITE_TKIP, 668 WLAN_CIPHER_SUITE_CCMP, 669 670 /* keep last -- depends on hw flags! */ 671 WLAN_CIPHER_SUITE_AES_CMAC 672 }; 673 674 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 675 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 676 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 677 return -EINVAL; 678 679 #ifdef CONFIG_PM 680 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 681 return -EINVAL; 682 #endif 683 684 if (!local->use_chanctx) { 685 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 686 const struct ieee80211_iface_combination *comb; 687 688 comb = &local->hw.wiphy->iface_combinations[i]; 689 690 if (comb->num_different_channels > 1) 691 return -EINVAL; 692 } 693 } else { 694 /* 695 * WDS is currently prohibited when channel contexts are used 696 * because there's no clear definition of which channel WDS 697 * type interfaces use 698 */ 699 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 700 return -EINVAL; 701 702 /* DFS currently not supported with channel context drivers */ 703 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 704 const struct ieee80211_iface_combination *comb; 705 706 comb = &local->hw.wiphy->iface_combinations[i]; 707 708 if (comb->radar_detect_widths) 709 return -EINVAL; 710 } 711 } 712 713 /* Only HW csum features are currently compatible with mac80211 */ 714 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 715 NETIF_F_HW_CSUM; 716 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 717 return -EINVAL; 718 719 if (hw->max_report_rates == 0) 720 hw->max_report_rates = hw->max_rates; 721 722 local->rx_chains = 1; 723 724 /* 725 * generic code guarantees at least one band, 726 * set this very early because much code assumes 727 * that hw.conf.channel is assigned 728 */ 729 channels = 0; 730 max_bitrates = 0; 731 supp_ht = false; 732 supp_vht = false; 733 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 734 struct ieee80211_supported_band *sband; 735 736 sband = local->hw.wiphy->bands[band]; 737 if (!sband) 738 continue; 739 740 if (!dflt_chandef.chan) { 741 cfg80211_chandef_create(&dflt_chandef, 742 &sband->channels[0], 743 NL80211_CHAN_NO_HT); 744 /* init channel we're on */ 745 if (!local->use_chanctx && !local->_oper_chandef.chan) { 746 local->hw.conf.chandef = dflt_chandef; 747 local->_oper_chandef = dflt_chandef; 748 } 749 local->monitor_chandef = dflt_chandef; 750 } 751 752 channels += sband->n_channels; 753 754 if (max_bitrates < sband->n_bitrates) 755 max_bitrates = sband->n_bitrates; 756 supp_ht = supp_ht || sband->ht_cap.ht_supported; 757 supp_vht = supp_vht || sband->vht_cap.vht_supported; 758 759 if (sband->ht_cap.ht_supported) 760 local->rx_chains = 761 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 762 local->rx_chains); 763 764 /* TODO: consider VHT for RX chains, hopefully it's the same */ 765 } 766 767 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 768 sizeof(void *) * channels, GFP_KERNEL); 769 if (!local->int_scan_req) 770 return -ENOMEM; 771 772 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 773 if (!local->hw.wiphy->bands[band]) 774 continue; 775 local->int_scan_req->rates[band] = (u32) -1; 776 } 777 778 /* if low-level driver supports AP, we also support VLAN */ 779 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 780 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 781 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 782 } 783 784 /* mac80211 always supports monitor */ 785 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 786 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 787 788 /* mac80211 doesn't support more than one IBSS interface right now */ 789 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 790 const struct ieee80211_iface_combination *c; 791 int j; 792 793 c = &hw->wiphy->iface_combinations[i]; 794 795 for (j = 0; j < c->n_limits; j++) 796 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 797 c->limits[j].max > 1) 798 return -EINVAL; 799 } 800 801 #ifndef CONFIG_MAC80211_MESH 802 /* mesh depends on Kconfig, but drivers should set it if they want */ 803 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 804 #endif 805 806 /* if the underlying driver supports mesh, mac80211 will (at least) 807 * provide routing of mesh authentication frames to userspace */ 808 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 809 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 810 811 /* mac80211 supports control port protocol changing */ 812 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 813 814 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 815 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 816 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 817 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 818 819 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 820 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 821 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 822 823 /* 824 * Calculate scan IE length -- we need this to alloc 825 * memory and to subtract from the driver limit. It 826 * includes the DS Params, (extended) supported rates, and HT 827 * information -- SSID is the driver's responsibility. 828 */ 829 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 830 3 /* DS Params */; 831 if (supp_ht) 832 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 833 834 if (supp_vht) 835 local->scan_ies_len += 836 2 + sizeof(struct ieee80211_vht_cap); 837 838 if (!local->ops->hw_scan) { 839 /* For hw_scan, driver needs to set these up. */ 840 local->hw.wiphy->max_scan_ssids = 4; 841 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 842 } 843 844 /* 845 * If the driver supports any scan IEs, then assume the 846 * limit includes the IEs mac80211 will add, otherwise 847 * leave it at zero and let the driver sort it out; we 848 * still pass our IEs to the driver but userspace will 849 * not be allowed to in that case. 850 */ 851 if (local->hw.wiphy->max_scan_ie_len) 852 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 853 854 /* Set up cipher suites unless driver already did */ 855 if (!local->hw.wiphy->cipher_suites) { 856 local->hw.wiphy->cipher_suites = cipher_suites; 857 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 858 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 859 local->hw.wiphy->n_cipher_suites--; 860 } 861 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 862 if (local->hw.wiphy->cipher_suites == cipher_suites) { 863 local->hw.wiphy->cipher_suites += 2; 864 local->hw.wiphy->n_cipher_suites -= 2; 865 } else { 866 u32 *suites; 867 int r, w = 0; 868 869 /* Filter out WEP */ 870 871 suites = kmemdup( 872 local->hw.wiphy->cipher_suites, 873 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 874 GFP_KERNEL); 875 if (!suites) { 876 result = -ENOMEM; 877 goto fail_wiphy_register; 878 } 879 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 880 u32 suite = local->hw.wiphy->cipher_suites[r]; 881 if (suite == WLAN_CIPHER_SUITE_WEP40 || 882 suite == WLAN_CIPHER_SUITE_WEP104) 883 continue; 884 suites[w++] = suite; 885 } 886 local->hw.wiphy->cipher_suites = suites; 887 local->hw.wiphy->n_cipher_suites = w; 888 local->wiphy_ciphers_allocated = true; 889 } 890 } 891 892 if (!local->ops->remain_on_channel) 893 local->hw.wiphy->max_remain_on_channel_duration = 5000; 894 895 /* mac80211 based drivers don't support internal TDLS setup */ 896 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 897 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 898 899 result = wiphy_register(local->hw.wiphy); 900 if (result < 0) 901 goto fail_wiphy_register; 902 903 /* 904 * We use the number of queues for feature tests (QoS, HT) internally 905 * so restrict them appropriately. 906 */ 907 if (hw->queues > IEEE80211_MAX_QUEUES) 908 hw->queues = IEEE80211_MAX_QUEUES; 909 910 local->workqueue = 911 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 912 if (!local->workqueue) { 913 result = -ENOMEM; 914 goto fail_workqueue; 915 } 916 917 /* 918 * The hardware needs headroom for sending the frame, 919 * and we need some headroom for passing the frame to monitor 920 * interfaces, but never both at the same time. 921 */ 922 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 923 IEEE80211_TX_STATUS_HEADROOM); 924 925 debugfs_hw_add(local); 926 927 /* 928 * if the driver doesn't specify a max listen interval we 929 * use 5 which should be a safe default 930 */ 931 if (local->hw.max_listen_interval == 0) 932 local->hw.max_listen_interval = 5; 933 934 local->hw.conf.listen_interval = local->hw.max_listen_interval; 935 936 local->dynamic_ps_forced_timeout = -1; 937 938 result = ieee80211_wep_init(local); 939 if (result < 0) 940 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 941 result); 942 943 local->hw.conf.flags = IEEE80211_CONF_IDLE; 944 945 ieee80211_led_init(local); 946 947 rtnl_lock(); 948 949 result = ieee80211_init_rate_ctrl_alg(local, 950 hw->rate_control_algorithm); 951 if (result < 0) { 952 wiphy_debug(local->hw.wiphy, 953 "Failed to initialize rate control algorithm\n"); 954 goto fail_rate; 955 } 956 957 /* add one default STA interface if supported */ 958 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 959 result = ieee80211_if_add(local, "wlan%d", NULL, 960 NL80211_IFTYPE_STATION, NULL); 961 if (result) 962 wiphy_warn(local->hw.wiphy, 963 "Failed to add default virtual iface\n"); 964 } 965 966 rtnl_unlock(); 967 968 local->network_latency_notifier.notifier_call = 969 ieee80211_max_network_latency; 970 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 971 &local->network_latency_notifier); 972 if (result) { 973 rtnl_lock(); 974 goto fail_pm_qos; 975 } 976 977 #ifdef CONFIG_INET 978 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 979 result = register_inetaddr_notifier(&local->ifa_notifier); 980 if (result) 981 goto fail_ifa; 982 #endif 983 984 #if IS_ENABLED(CONFIG_IPV6) 985 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 986 result = register_inet6addr_notifier(&local->ifa6_notifier); 987 if (result) 988 goto fail_ifa6; 989 #endif 990 991 return 0; 992 993 #if IS_ENABLED(CONFIG_IPV6) 994 fail_ifa6: 995 #ifdef CONFIG_INET 996 unregister_inetaddr_notifier(&local->ifa_notifier); 997 #endif 998 #endif 999 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1000 fail_ifa: 1001 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1002 &local->network_latency_notifier); 1003 rtnl_lock(); 1004 #endif 1005 fail_pm_qos: 1006 ieee80211_led_exit(local); 1007 ieee80211_remove_interfaces(local); 1008 fail_rate: 1009 rtnl_unlock(); 1010 ieee80211_wep_free(local); 1011 sta_info_stop(local); 1012 destroy_workqueue(local->workqueue); 1013 fail_workqueue: 1014 wiphy_unregister(local->hw.wiphy); 1015 fail_wiphy_register: 1016 if (local->wiphy_ciphers_allocated) 1017 kfree(local->hw.wiphy->cipher_suites); 1018 kfree(local->int_scan_req); 1019 return result; 1020 } 1021 EXPORT_SYMBOL(ieee80211_register_hw); 1022 1023 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1024 { 1025 struct ieee80211_local *local = hw_to_local(hw); 1026 1027 tasklet_kill(&local->tx_pending_tasklet); 1028 tasklet_kill(&local->tasklet); 1029 1030 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1031 &local->network_latency_notifier); 1032 #ifdef CONFIG_INET 1033 unregister_inetaddr_notifier(&local->ifa_notifier); 1034 #endif 1035 #if IS_ENABLED(CONFIG_IPV6) 1036 unregister_inet6addr_notifier(&local->ifa6_notifier); 1037 #endif 1038 1039 rtnl_lock(); 1040 1041 /* 1042 * At this point, interface list manipulations are fine 1043 * because the driver cannot be handing us frames any 1044 * more and the tasklet is killed. 1045 */ 1046 ieee80211_remove_interfaces(local); 1047 1048 rtnl_unlock(); 1049 1050 cancel_work_sync(&local->restart_work); 1051 cancel_work_sync(&local->reconfig_filter); 1052 flush_work(&local->sched_scan_stopped_work); 1053 1054 ieee80211_clear_tx_pending(local); 1055 rate_control_deinitialize(local); 1056 1057 if (skb_queue_len(&local->skb_queue) || 1058 skb_queue_len(&local->skb_queue_unreliable)) 1059 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1060 skb_queue_purge(&local->skb_queue); 1061 skb_queue_purge(&local->skb_queue_unreliable); 1062 1063 destroy_workqueue(local->workqueue); 1064 wiphy_unregister(local->hw.wiphy); 1065 sta_info_stop(local); 1066 ieee80211_wep_free(local); 1067 ieee80211_led_exit(local); 1068 kfree(local->int_scan_req); 1069 } 1070 EXPORT_SYMBOL(ieee80211_unregister_hw); 1071 1072 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1073 { 1074 WARN_ONCE(1, "Have pending ack frames!\n"); 1075 kfree_skb(p); 1076 return 0; 1077 } 1078 1079 void ieee80211_free_hw(struct ieee80211_hw *hw) 1080 { 1081 struct ieee80211_local *local = hw_to_local(hw); 1082 1083 mutex_destroy(&local->iflist_mtx); 1084 mutex_destroy(&local->mtx); 1085 1086 if (local->wiphy_ciphers_allocated) 1087 kfree(local->hw.wiphy->cipher_suites); 1088 1089 idr_for_each(&local->ack_status_frames, 1090 ieee80211_free_ack_frame, NULL); 1091 idr_destroy(&local->ack_status_frames); 1092 1093 wiphy_free(local->hw.wiphy); 1094 } 1095 EXPORT_SYMBOL(ieee80211_free_hw); 1096 1097 static int __init ieee80211_init(void) 1098 { 1099 struct sk_buff *skb; 1100 int ret; 1101 1102 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1103 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1104 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1105 1106 ret = rc80211_minstrel_init(); 1107 if (ret) 1108 return ret; 1109 1110 ret = rc80211_minstrel_ht_init(); 1111 if (ret) 1112 goto err_minstrel; 1113 1114 ret = rc80211_pid_init(); 1115 if (ret) 1116 goto err_pid; 1117 1118 ret = ieee80211_iface_init(); 1119 if (ret) 1120 goto err_netdev; 1121 1122 return 0; 1123 err_netdev: 1124 rc80211_pid_exit(); 1125 err_pid: 1126 rc80211_minstrel_ht_exit(); 1127 err_minstrel: 1128 rc80211_minstrel_exit(); 1129 1130 return ret; 1131 } 1132 1133 static void __exit ieee80211_exit(void) 1134 { 1135 rc80211_pid_exit(); 1136 rc80211_minstrel_ht_exit(); 1137 rc80211_minstrel_exit(); 1138 1139 ieee80211s_stop(); 1140 1141 ieee80211_iface_exit(); 1142 1143 rcu_barrier(); 1144 } 1145 1146 1147 subsys_initcall(ieee80211_init); 1148 module_exit(ieee80211_exit); 1149 1150 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1151 MODULE_LICENSE("GPL"); 1152