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 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 152 continue; 153 power = min(power, sdata->vif.bss_conf.txpower); 154 } 155 rcu_read_unlock(); 156 157 if (local->hw.conf.power_level != power) { 158 changed |= IEEE80211_CONF_CHANGE_POWER; 159 local->hw.conf.power_level = power; 160 } 161 162 return changed; 163 } 164 165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 166 { 167 int ret = 0; 168 169 might_sleep(); 170 171 if (!local->use_chanctx) 172 changed |= ieee80211_hw_conf_chan(local); 173 else 174 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 175 IEEE80211_CONF_CHANGE_POWER); 176 177 if (changed && local->open_count) { 178 ret = drv_config(local, changed); 179 /* 180 * Goal: 181 * HW reconfiguration should never fail, the driver has told 182 * us what it can support so it should live up to that promise. 183 * 184 * Current status: 185 * rfkill is not integrated with mac80211 and a 186 * configuration command can thus fail if hardware rfkill 187 * is enabled 188 * 189 * FIXME: integrate rfkill with mac80211 and then add this 190 * WARN_ON() back 191 * 192 */ 193 /* WARN_ON(ret); */ 194 } 195 196 return ret; 197 } 198 199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 200 u32 changed) 201 { 202 struct ieee80211_local *local = sdata->local; 203 204 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 205 return; 206 207 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 208 } 209 210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 211 { 212 sdata->vif.bss_conf.use_cts_prot = false; 213 sdata->vif.bss_conf.use_short_preamble = false; 214 sdata->vif.bss_conf.use_short_slot = false; 215 return BSS_CHANGED_ERP_CTS_PROT | 216 BSS_CHANGED_ERP_PREAMBLE | 217 BSS_CHANGED_ERP_SLOT; 218 } 219 220 static void ieee80211_tasklet_handler(unsigned long data) 221 { 222 struct ieee80211_local *local = (struct ieee80211_local *) data; 223 struct sk_buff *skb; 224 225 while ((skb = skb_dequeue(&local->skb_queue)) || 226 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 227 switch (skb->pkt_type) { 228 case IEEE80211_RX_MSG: 229 /* Clear skb->pkt_type in order to not confuse kernel 230 * netstack. */ 231 skb->pkt_type = 0; 232 ieee80211_rx(&local->hw, skb); 233 break; 234 case IEEE80211_TX_STATUS_MSG: 235 skb->pkt_type = 0; 236 ieee80211_tx_status(&local->hw, skb); 237 break; 238 default: 239 WARN(1, "mac80211: Packet is of unknown type %d\n", 240 skb->pkt_type); 241 dev_kfree_skb(skb); 242 break; 243 } 244 } 245 } 246 247 static void ieee80211_restart_work(struct work_struct *work) 248 { 249 struct ieee80211_local *local = 250 container_of(work, struct ieee80211_local, restart_work); 251 252 /* wait for scan work complete */ 253 flush_workqueue(local->workqueue); 254 255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 256 "%s called with hardware scan in progress\n", __func__); 257 258 rtnl_lock(); 259 ieee80211_scan_cancel(local); 260 ieee80211_reconfig(local); 261 rtnl_unlock(); 262 } 263 264 void ieee80211_restart_hw(struct ieee80211_hw *hw) 265 { 266 struct ieee80211_local *local = hw_to_local(hw); 267 268 trace_api_restart_hw(local); 269 270 wiphy_info(hw->wiphy, 271 "Hardware restart was requested\n"); 272 273 /* use this reason, ieee80211_reconfig will unblock it */ 274 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 275 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 276 277 /* 278 * Stop all Rx during the reconfig. We don't want state changes 279 * or driver callbacks while this is in progress. 280 */ 281 local->in_reconfig = true; 282 barrier(); 283 284 schedule_work(&local->restart_work); 285 } 286 EXPORT_SYMBOL(ieee80211_restart_hw); 287 288 #ifdef CONFIG_INET 289 static int ieee80211_ifa_changed(struct notifier_block *nb, 290 unsigned long data, void *arg) 291 { 292 struct in_ifaddr *ifa = arg; 293 struct ieee80211_local *local = 294 container_of(nb, struct ieee80211_local, 295 ifa_notifier); 296 struct net_device *ndev = ifa->ifa_dev->dev; 297 struct wireless_dev *wdev = ndev->ieee80211_ptr; 298 struct in_device *idev; 299 struct ieee80211_sub_if_data *sdata; 300 struct ieee80211_bss_conf *bss_conf; 301 struct ieee80211_if_managed *ifmgd; 302 int c = 0; 303 304 /* Make sure it's our interface that got changed */ 305 if (!wdev) 306 return NOTIFY_DONE; 307 308 if (wdev->wiphy != local->hw.wiphy) 309 return NOTIFY_DONE; 310 311 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 312 bss_conf = &sdata->vif.bss_conf; 313 314 /* ARP filtering is only supported in managed mode */ 315 if (sdata->vif.type != NL80211_IFTYPE_STATION) 316 return NOTIFY_DONE; 317 318 idev = __in_dev_get_rtnl(sdata->dev); 319 if (!idev) 320 return NOTIFY_DONE; 321 322 ifmgd = &sdata->u.mgd; 323 sdata_lock(sdata); 324 325 /* Copy the addresses to the bss_conf list */ 326 ifa = idev->ifa_list; 327 while (ifa) { 328 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 329 bss_conf->arp_addr_list[c] = ifa->ifa_address; 330 ifa = ifa->ifa_next; 331 c++; 332 } 333 334 bss_conf->arp_addr_cnt = c; 335 336 /* Configure driver only if associated (which also implies it is up) */ 337 if (ifmgd->associated) 338 ieee80211_bss_info_change_notify(sdata, 339 BSS_CHANGED_ARP_FILTER); 340 341 sdata_unlock(sdata); 342 343 return NOTIFY_DONE; 344 } 345 #endif 346 347 #if IS_ENABLED(CONFIG_IPV6) 348 static int ieee80211_ifa6_changed(struct notifier_block *nb, 349 unsigned long data, void *arg) 350 { 351 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 352 struct inet6_dev *idev = ifa->idev; 353 struct net_device *ndev = ifa->idev->dev; 354 struct ieee80211_local *local = 355 container_of(nb, struct ieee80211_local, ifa6_notifier); 356 struct wireless_dev *wdev = ndev->ieee80211_ptr; 357 struct ieee80211_sub_if_data *sdata; 358 359 /* Make sure it's our interface that got changed */ 360 if (!wdev || wdev->wiphy != local->hw.wiphy) 361 return NOTIFY_DONE; 362 363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 364 365 /* 366 * For now only support station mode. This is mostly because 367 * doing AP would have to handle AP_VLAN in some way ... 368 */ 369 if (sdata->vif.type != NL80211_IFTYPE_STATION) 370 return NOTIFY_DONE; 371 372 drv_ipv6_addr_change(local, sdata, idev); 373 374 return NOTIFY_DONE; 375 } 376 #endif 377 378 /* There isn't a lot of sense in it, but you can transmit anything you like */ 379 static const struct ieee80211_txrx_stypes 380 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 381 [NL80211_IFTYPE_ADHOC] = { 382 .tx = 0xffff, 383 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 384 BIT(IEEE80211_STYPE_AUTH >> 4) | 385 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 386 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 387 }, 388 [NL80211_IFTYPE_STATION] = { 389 .tx = 0xffff, 390 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 391 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 392 }, 393 [NL80211_IFTYPE_AP] = { 394 .tx = 0xffff, 395 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 396 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 397 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 398 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 399 BIT(IEEE80211_STYPE_AUTH >> 4) | 400 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 401 BIT(IEEE80211_STYPE_ACTION >> 4), 402 }, 403 [NL80211_IFTYPE_AP_VLAN] = { 404 /* copy AP */ 405 .tx = 0xffff, 406 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 407 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 408 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 409 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 410 BIT(IEEE80211_STYPE_AUTH >> 4) | 411 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 412 BIT(IEEE80211_STYPE_ACTION >> 4), 413 }, 414 [NL80211_IFTYPE_P2P_CLIENT] = { 415 .tx = 0xffff, 416 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 418 }, 419 [NL80211_IFTYPE_P2P_GO] = { 420 .tx = 0xffff, 421 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 422 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 423 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 424 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 425 BIT(IEEE80211_STYPE_AUTH >> 4) | 426 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 427 BIT(IEEE80211_STYPE_ACTION >> 4), 428 }, 429 [NL80211_IFTYPE_MESH_POINT] = { 430 .tx = 0xffff, 431 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 432 BIT(IEEE80211_STYPE_AUTH >> 4) | 433 BIT(IEEE80211_STYPE_DEAUTH >> 4), 434 }, 435 [NL80211_IFTYPE_P2P_DEVICE] = { 436 .tx = 0xffff, 437 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 439 }, 440 }; 441 442 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 443 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 444 IEEE80211_HT_AMPDU_PARM_DENSITY, 445 446 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 447 IEEE80211_HT_CAP_MAX_AMSDU | 448 IEEE80211_HT_CAP_SGI_20 | 449 IEEE80211_HT_CAP_SGI_40), 450 .mcs = { 451 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 452 0xff, 0xff, 0xff, 0xff, 0xff, }, 453 }, 454 }; 455 456 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 457 .vht_cap_info = 458 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 459 IEEE80211_VHT_CAP_SHORT_GI_80 | 460 IEEE80211_VHT_CAP_SHORT_GI_160 | 461 IEEE80211_VHT_CAP_RXSTBC_1 | 462 IEEE80211_VHT_CAP_RXSTBC_2 | 463 IEEE80211_VHT_CAP_RXSTBC_3 | 464 IEEE80211_VHT_CAP_RXSTBC_4 | 465 IEEE80211_VHT_CAP_TXSTBC | 466 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 467 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 468 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 469 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 470 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 471 .supp_mcs = { 472 .rx_mcs_map = cpu_to_le16(~0), 473 .tx_mcs_map = cpu_to_le16(~0), 474 }, 475 }; 476 477 static const u8 extended_capabilities[] = { 478 0, 0, 0, 0, 0, 0, 0, 479 WLAN_EXT_CAPA8_OPMODE_NOTIF, 480 }; 481 482 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 483 const struct ieee80211_ops *ops) 484 { 485 struct ieee80211_local *local; 486 int priv_size, i; 487 struct wiphy *wiphy; 488 bool use_chanctx; 489 490 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 491 !ops->add_interface || !ops->remove_interface || 492 !ops->configure_filter)) 493 return NULL; 494 495 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 496 return NULL; 497 498 /* check all or no channel context operations exist */ 499 i = !!ops->add_chanctx + !!ops->remove_chanctx + 500 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 501 !!ops->unassign_vif_chanctx; 502 if (WARN_ON(i != 0 && i != 5)) 503 return NULL; 504 use_chanctx = i == 5; 505 506 /* Ensure 32-byte alignment of our private data and hw private data. 507 * We use the wiphy priv data for both our ieee80211_local and for 508 * the driver's private data 509 * 510 * In memory it'll be like this: 511 * 512 * +-------------------------+ 513 * | struct wiphy | 514 * +-------------------------+ 515 * | struct ieee80211_local | 516 * +-------------------------+ 517 * | driver's private data | 518 * +-------------------------+ 519 * 520 */ 521 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 522 523 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 524 525 if (!wiphy) 526 return NULL; 527 528 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 529 530 wiphy->privid = mac80211_wiphy_privid; 531 532 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 533 WIPHY_FLAG_4ADDR_AP | 534 WIPHY_FLAG_4ADDR_STATION | 535 WIPHY_FLAG_REPORTS_OBSS | 536 WIPHY_FLAG_OFFCHAN_TX; 537 538 wiphy->extended_capabilities = extended_capabilities; 539 wiphy->extended_capabilities_mask = extended_capabilities; 540 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 541 542 if (ops->remain_on_channel) 543 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 544 545 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 546 NL80211_FEATURE_SAE | 547 NL80211_FEATURE_HT_IBSS | 548 NL80211_FEATURE_VIF_TXPOWER | 549 NL80211_FEATURE_USERSPACE_MPM; 550 551 if (!ops->hw_scan) 552 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 553 NL80211_FEATURE_AP_SCAN; 554 555 556 if (!ops->set_key) 557 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 558 559 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 560 561 local = wiphy_priv(wiphy); 562 563 local->hw.wiphy = wiphy; 564 565 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 566 567 local->ops = ops; 568 local->use_chanctx = use_chanctx; 569 570 /* set up some defaults */ 571 local->hw.queues = 1; 572 local->hw.max_rates = 1; 573 local->hw.max_report_rates = 0; 574 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 575 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 576 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 577 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 578 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 579 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 580 IEEE80211_RADIOTAP_MCS_HAVE_GI | 581 IEEE80211_RADIOTAP_MCS_HAVE_BW; 582 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 583 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 584 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 585 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 586 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 587 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 588 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 589 590 INIT_LIST_HEAD(&local->interfaces); 591 592 __hw_addr_init(&local->mc_list); 593 594 mutex_init(&local->iflist_mtx); 595 mutex_init(&local->mtx); 596 597 mutex_init(&local->key_mtx); 598 spin_lock_init(&local->filter_lock); 599 spin_lock_init(&local->rx_path_lock); 600 spin_lock_init(&local->queue_stop_reason_lock); 601 602 INIT_LIST_HEAD(&local->chanctx_list); 603 mutex_init(&local->chanctx_mtx); 604 605 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 606 607 INIT_WORK(&local->restart_work, ieee80211_restart_work); 608 609 INIT_WORK(&local->radar_detected_work, 610 ieee80211_dfs_radar_detected_work); 611 612 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 613 local->smps_mode = IEEE80211_SMPS_OFF; 614 615 INIT_WORK(&local->dynamic_ps_enable_work, 616 ieee80211_dynamic_ps_enable_work); 617 INIT_WORK(&local->dynamic_ps_disable_work, 618 ieee80211_dynamic_ps_disable_work); 619 setup_timer(&local->dynamic_ps_timer, 620 ieee80211_dynamic_ps_timer, (unsigned long) local); 621 622 INIT_WORK(&local->sched_scan_stopped_work, 623 ieee80211_sched_scan_stopped_work); 624 625 spin_lock_init(&local->ack_status_lock); 626 idr_init(&local->ack_status_frames); 627 628 sta_info_init(local); 629 630 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 631 skb_queue_head_init(&local->pending[i]); 632 atomic_set(&local->agg_queue_stop[i], 0); 633 } 634 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 635 (unsigned long)local); 636 637 tasklet_init(&local->tasklet, 638 ieee80211_tasklet_handler, 639 (unsigned long) local); 640 641 skb_queue_head_init(&local->skb_queue); 642 skb_queue_head_init(&local->skb_queue_unreliable); 643 644 ieee80211_led_names(local); 645 646 ieee80211_roc_setup(local); 647 648 return &local->hw; 649 } 650 EXPORT_SYMBOL(ieee80211_alloc_hw); 651 652 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 653 { 654 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 655 IS_ERR(local->wep_rx_tfm)); 656 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE; 657 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes; 658 int n_suites = 0, r = 0, w = 0; 659 u32 *suites; 660 static const u32 cipher_suites[] = { 661 /* keep WEP first, it may be removed below */ 662 WLAN_CIPHER_SUITE_WEP40, 663 WLAN_CIPHER_SUITE_WEP104, 664 WLAN_CIPHER_SUITE_TKIP, 665 WLAN_CIPHER_SUITE_CCMP, 666 667 /* keep last -- depends on hw flags! */ 668 WLAN_CIPHER_SUITE_AES_CMAC 669 }; 670 671 /* Driver specifies the ciphers, we have nothing to do... */ 672 if (local->hw.wiphy->cipher_suites && have_wep) 673 return 0; 674 675 /* Set up cipher suites if driver relies on mac80211 cipher defs */ 676 if (!local->hw.wiphy->cipher_suites && !cs) { 677 local->hw.wiphy->cipher_suites = cipher_suites; 678 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 679 680 if (!have_mfp) 681 local->hw.wiphy->n_cipher_suites--; 682 683 if (!have_wep) { 684 local->hw.wiphy->cipher_suites += 2; 685 local->hw.wiphy->n_cipher_suites -= 2; 686 } 687 688 return 0; 689 } 690 691 if (!local->hw.wiphy->cipher_suites) { 692 /* 693 * Driver specifies cipher schemes only 694 * We start counting ciphers defined by schemes, TKIP and CCMP 695 */ 696 n_suites = local->hw.n_cipher_schemes + 2; 697 698 /* check if we have WEP40 and WEP104 */ 699 if (have_wep) 700 n_suites += 2; 701 702 /* check if we have AES_CMAC */ 703 if (have_mfp) 704 n_suites++; 705 706 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 707 if (!suites) 708 return -ENOMEM; 709 710 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 711 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 712 713 if (have_wep) { 714 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 715 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 716 } 717 718 if (have_mfp) 719 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 720 721 for (r = 0; r < local->hw.n_cipher_schemes; r++) 722 suites[w++] = cs[r].cipher; 723 } else { 724 /* Driver provides cipher suites, but we need to exclude WEP */ 725 suites = kmemdup(local->hw.wiphy->cipher_suites, 726 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 727 GFP_KERNEL); 728 if (!suites) 729 return -ENOMEM; 730 731 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 732 u32 suite = local->hw.wiphy->cipher_suites[r]; 733 734 if (suite == WLAN_CIPHER_SUITE_WEP40 || 735 suite == WLAN_CIPHER_SUITE_WEP104) 736 continue; 737 suites[w++] = suite; 738 } 739 } 740 741 local->hw.wiphy->cipher_suites = suites; 742 local->hw.wiphy->n_cipher_suites = w; 743 local->wiphy_ciphers_allocated = true; 744 745 return 0; 746 } 747 748 int ieee80211_register_hw(struct ieee80211_hw *hw) 749 { 750 struct ieee80211_local *local = hw_to_local(hw); 751 int result, i; 752 enum ieee80211_band band; 753 int channels, max_bitrates; 754 bool supp_ht, supp_vht; 755 netdev_features_t feature_whitelist; 756 struct cfg80211_chan_def dflt_chandef = {}; 757 758 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 759 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 760 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 761 return -EINVAL; 762 763 #ifdef CONFIG_PM 764 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 765 return -EINVAL; 766 #endif 767 768 if (!local->use_chanctx) { 769 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 770 const struct ieee80211_iface_combination *comb; 771 772 comb = &local->hw.wiphy->iface_combinations[i]; 773 774 if (comb->num_different_channels > 1) 775 return -EINVAL; 776 } 777 } else { 778 /* 779 * WDS is currently prohibited when channel contexts are used 780 * because there's no clear definition of which channel WDS 781 * type interfaces use 782 */ 783 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 784 return -EINVAL; 785 786 /* DFS currently not supported with channel context drivers */ 787 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 788 const struct ieee80211_iface_combination *comb; 789 790 comb = &local->hw.wiphy->iface_combinations[i]; 791 792 if (comb->radar_detect_widths) 793 return -EINVAL; 794 } 795 } 796 797 /* Only HW csum features are currently compatible with mac80211 */ 798 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 799 NETIF_F_HW_CSUM; 800 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 801 return -EINVAL; 802 803 if (hw->max_report_rates == 0) 804 hw->max_report_rates = hw->max_rates; 805 806 local->rx_chains = 1; 807 808 /* 809 * generic code guarantees at least one band, 810 * set this very early because much code assumes 811 * that hw.conf.channel is assigned 812 */ 813 channels = 0; 814 max_bitrates = 0; 815 supp_ht = false; 816 supp_vht = false; 817 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 818 struct ieee80211_supported_band *sband; 819 820 sband = local->hw.wiphy->bands[band]; 821 if (!sband) 822 continue; 823 824 if (!dflt_chandef.chan) { 825 cfg80211_chandef_create(&dflt_chandef, 826 &sband->channels[0], 827 NL80211_CHAN_NO_HT); 828 /* init channel we're on */ 829 if (!local->use_chanctx && !local->_oper_chandef.chan) { 830 local->hw.conf.chandef = dflt_chandef; 831 local->_oper_chandef = dflt_chandef; 832 } 833 local->monitor_chandef = dflt_chandef; 834 } 835 836 channels += sband->n_channels; 837 838 if (max_bitrates < sband->n_bitrates) 839 max_bitrates = sband->n_bitrates; 840 supp_ht = supp_ht || sband->ht_cap.ht_supported; 841 supp_vht = supp_vht || sband->vht_cap.vht_supported; 842 843 if (sband->ht_cap.ht_supported) 844 local->rx_chains = 845 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 846 local->rx_chains); 847 848 /* TODO: consider VHT for RX chains, hopefully it's the same */ 849 } 850 851 /* if low-level driver supports AP, we also support VLAN */ 852 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 853 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 854 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 855 } 856 857 /* mac80211 always supports monitor */ 858 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 859 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 860 861 /* mac80211 doesn't support more than one IBSS interface right now */ 862 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 863 const struct ieee80211_iface_combination *c; 864 int j; 865 866 c = &hw->wiphy->iface_combinations[i]; 867 868 for (j = 0; j < c->n_limits; j++) 869 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 870 c->limits[j].max > 1) 871 return -EINVAL; 872 } 873 874 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 875 sizeof(void *) * channels, GFP_KERNEL); 876 if (!local->int_scan_req) 877 return -ENOMEM; 878 879 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 880 if (!local->hw.wiphy->bands[band]) 881 continue; 882 local->int_scan_req->rates[band] = (u32) -1; 883 } 884 885 #ifndef CONFIG_MAC80211_MESH 886 /* mesh depends on Kconfig, but drivers should set it if they want */ 887 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 888 #endif 889 890 /* if the underlying driver supports mesh, mac80211 will (at least) 891 * provide routing of mesh authentication frames to userspace */ 892 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 893 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 894 895 /* mac80211 supports control port protocol changing */ 896 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 897 898 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { 899 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 900 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { 901 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 902 if (hw->max_signal <= 0) { 903 result = -EINVAL; 904 goto fail_wiphy_register; 905 } 906 } 907 908 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 909 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 910 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 911 912 /* 913 * Calculate scan IE length -- we need this to alloc 914 * memory and to subtract from the driver limit. It 915 * includes the DS Params, (extended) supported rates, and HT 916 * information -- SSID is the driver's responsibility. 917 */ 918 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 919 3 /* DS Params */; 920 if (supp_ht) 921 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 922 923 if (supp_vht) 924 local->scan_ies_len += 925 2 + sizeof(struct ieee80211_vht_cap); 926 927 if (!local->ops->hw_scan) { 928 /* For hw_scan, driver needs to set these up. */ 929 local->hw.wiphy->max_scan_ssids = 4; 930 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 931 } 932 933 /* 934 * If the driver supports any scan IEs, then assume the 935 * limit includes the IEs mac80211 will add, otherwise 936 * leave it at zero and let the driver sort it out; we 937 * still pass our IEs to the driver but userspace will 938 * not be allowed to in that case. 939 */ 940 if (local->hw.wiphy->max_scan_ie_len) 941 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 942 943 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 944 local->hw.n_cipher_schemes)); 945 946 result = ieee80211_init_cipher_suites(local); 947 if (result < 0) 948 goto fail_wiphy_register; 949 950 if (!local->ops->remain_on_channel) 951 local->hw.wiphy->max_remain_on_channel_duration = 5000; 952 953 /* mac80211 based drivers don't support internal TDLS setup */ 954 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 955 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 956 957 result = wiphy_register(local->hw.wiphy); 958 if (result < 0) 959 goto fail_wiphy_register; 960 961 /* 962 * We use the number of queues for feature tests (QoS, HT) internally 963 * so restrict them appropriately. 964 */ 965 if (hw->queues > IEEE80211_MAX_QUEUES) 966 hw->queues = IEEE80211_MAX_QUEUES; 967 968 local->workqueue = 969 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 970 if (!local->workqueue) { 971 result = -ENOMEM; 972 goto fail_workqueue; 973 } 974 975 /* 976 * The hardware needs headroom for sending the frame, 977 * and we need some headroom for passing the frame to monitor 978 * interfaces, but never both at the same time. 979 */ 980 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 981 IEEE80211_TX_STATUS_HEADROOM); 982 983 debugfs_hw_add(local); 984 985 /* 986 * if the driver doesn't specify a max listen interval we 987 * use 5 which should be a safe default 988 */ 989 if (local->hw.max_listen_interval == 0) 990 local->hw.max_listen_interval = 5; 991 992 local->hw.conf.listen_interval = local->hw.max_listen_interval; 993 994 local->dynamic_ps_forced_timeout = -1; 995 996 result = ieee80211_wep_init(local); 997 if (result < 0) 998 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 999 result); 1000 1001 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1002 1003 ieee80211_led_init(local); 1004 1005 rtnl_lock(); 1006 1007 result = ieee80211_init_rate_ctrl_alg(local, 1008 hw->rate_control_algorithm); 1009 if (result < 0) { 1010 wiphy_debug(local->hw.wiphy, 1011 "Failed to initialize rate control algorithm\n"); 1012 goto fail_rate; 1013 } 1014 1015 /* add one default STA interface if supported */ 1016 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 1017 result = ieee80211_if_add(local, "wlan%d", NULL, 1018 NL80211_IFTYPE_STATION, NULL); 1019 if (result) 1020 wiphy_warn(local->hw.wiphy, 1021 "Failed to add default virtual iface\n"); 1022 } 1023 1024 rtnl_unlock(); 1025 1026 local->network_latency_notifier.notifier_call = 1027 ieee80211_max_network_latency; 1028 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1029 &local->network_latency_notifier); 1030 if (result) { 1031 rtnl_lock(); 1032 goto fail_pm_qos; 1033 } 1034 1035 #ifdef CONFIG_INET 1036 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1037 result = register_inetaddr_notifier(&local->ifa_notifier); 1038 if (result) 1039 goto fail_ifa; 1040 #endif 1041 1042 #if IS_ENABLED(CONFIG_IPV6) 1043 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1044 result = register_inet6addr_notifier(&local->ifa6_notifier); 1045 if (result) 1046 goto fail_ifa6; 1047 #endif 1048 1049 return 0; 1050 1051 #if IS_ENABLED(CONFIG_IPV6) 1052 fail_ifa6: 1053 #ifdef CONFIG_INET 1054 unregister_inetaddr_notifier(&local->ifa_notifier); 1055 #endif 1056 #endif 1057 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1058 fail_ifa: 1059 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1060 &local->network_latency_notifier); 1061 rtnl_lock(); 1062 #endif 1063 fail_pm_qos: 1064 ieee80211_led_exit(local); 1065 ieee80211_remove_interfaces(local); 1066 fail_rate: 1067 rtnl_unlock(); 1068 ieee80211_wep_free(local); 1069 sta_info_stop(local); 1070 destroy_workqueue(local->workqueue); 1071 fail_workqueue: 1072 wiphy_unregister(local->hw.wiphy); 1073 fail_wiphy_register: 1074 if (local->wiphy_ciphers_allocated) 1075 kfree(local->hw.wiphy->cipher_suites); 1076 kfree(local->int_scan_req); 1077 return result; 1078 } 1079 EXPORT_SYMBOL(ieee80211_register_hw); 1080 1081 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 1082 struct net_device *napi_dev, 1083 int (*poll)(struct napi_struct *, int), 1084 int weight) 1085 { 1086 struct ieee80211_local *local = hw_to_local(hw); 1087 1088 netif_napi_add(napi_dev, napi, poll, weight); 1089 local->napi = napi; 1090 } 1091 EXPORT_SYMBOL_GPL(ieee80211_napi_add); 1092 1093 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1094 { 1095 struct ieee80211_local *local = hw_to_local(hw); 1096 1097 tasklet_kill(&local->tx_pending_tasklet); 1098 tasklet_kill(&local->tasklet); 1099 1100 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1101 &local->network_latency_notifier); 1102 #ifdef CONFIG_INET 1103 unregister_inetaddr_notifier(&local->ifa_notifier); 1104 #endif 1105 #if IS_ENABLED(CONFIG_IPV6) 1106 unregister_inet6addr_notifier(&local->ifa6_notifier); 1107 #endif 1108 1109 rtnl_lock(); 1110 1111 /* 1112 * At this point, interface list manipulations are fine 1113 * because the driver cannot be handing us frames any 1114 * more and the tasklet is killed. 1115 */ 1116 ieee80211_remove_interfaces(local); 1117 1118 rtnl_unlock(); 1119 1120 cancel_work_sync(&local->restart_work); 1121 cancel_work_sync(&local->reconfig_filter); 1122 flush_work(&local->sched_scan_stopped_work); 1123 1124 ieee80211_clear_tx_pending(local); 1125 rate_control_deinitialize(local); 1126 1127 if (skb_queue_len(&local->skb_queue) || 1128 skb_queue_len(&local->skb_queue_unreliable)) 1129 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1130 skb_queue_purge(&local->skb_queue); 1131 skb_queue_purge(&local->skb_queue_unreliable); 1132 1133 destroy_workqueue(local->workqueue); 1134 wiphy_unregister(local->hw.wiphy); 1135 sta_info_stop(local); 1136 ieee80211_wep_free(local); 1137 ieee80211_led_exit(local); 1138 kfree(local->int_scan_req); 1139 } 1140 EXPORT_SYMBOL(ieee80211_unregister_hw); 1141 1142 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1143 { 1144 WARN_ONCE(1, "Have pending ack frames!\n"); 1145 kfree_skb(p); 1146 return 0; 1147 } 1148 1149 void ieee80211_free_hw(struct ieee80211_hw *hw) 1150 { 1151 struct ieee80211_local *local = hw_to_local(hw); 1152 1153 mutex_destroy(&local->iflist_mtx); 1154 mutex_destroy(&local->mtx); 1155 1156 if (local->wiphy_ciphers_allocated) 1157 kfree(local->hw.wiphy->cipher_suites); 1158 1159 idr_for_each(&local->ack_status_frames, 1160 ieee80211_free_ack_frame, NULL); 1161 idr_destroy(&local->ack_status_frames); 1162 1163 kfree(rcu_access_pointer(local->tx_latency)); 1164 1165 wiphy_free(local->hw.wiphy); 1166 } 1167 EXPORT_SYMBOL(ieee80211_free_hw); 1168 1169 static int __init ieee80211_init(void) 1170 { 1171 struct sk_buff *skb; 1172 int ret; 1173 1174 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1175 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1176 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1177 1178 ret = rc80211_minstrel_init(); 1179 if (ret) 1180 return ret; 1181 1182 ret = rc80211_minstrel_ht_init(); 1183 if (ret) 1184 goto err_minstrel; 1185 1186 ret = rc80211_pid_init(); 1187 if (ret) 1188 goto err_pid; 1189 1190 ret = ieee80211_iface_init(); 1191 if (ret) 1192 goto err_netdev; 1193 1194 return 0; 1195 err_netdev: 1196 rc80211_pid_exit(); 1197 err_pid: 1198 rc80211_minstrel_ht_exit(); 1199 err_minstrel: 1200 rc80211_minstrel_exit(); 1201 1202 return ret; 1203 } 1204 1205 static void __exit ieee80211_exit(void) 1206 { 1207 rc80211_pid_exit(); 1208 rc80211_minstrel_ht_exit(); 1209 rc80211_minstrel_exit(); 1210 1211 ieee80211s_stop(); 1212 1213 ieee80211_iface_exit(); 1214 1215 rcu_barrier(); 1216 } 1217 1218 1219 subsys_initcall(ieee80211_init); 1220 module_exit(ieee80211_exit); 1221 1222 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1223 MODULE_LICENSE("GPL"); 1224