1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * Copyright (C) 2017 Intel Deutschland GmbH 7 * Copyright (C) 2018 - 2019 Intel Corporation 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14 #include <net/mac80211.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/netdevice.h> 18 #include <linux/types.h> 19 #include <linux/slab.h> 20 #include <linux/skbuff.h> 21 #include <linux/etherdevice.h> 22 #include <linux/if_arp.h> 23 #include <linux/rtnetlink.h> 24 #include <linux/bitmap.h> 25 #include <linux/inetdevice.h> 26 #include <net/net_namespace.h> 27 #include <net/cfg80211.h> 28 #include <net/addrconf.h> 29 30 #include "ieee80211_i.h" 31 #include "driver-ops.h" 32 #include "rate.h" 33 #include "mesh.h" 34 #include "wep.h" 35 #include "led.h" 36 #include "debugfs.h" 37 38 void ieee80211_configure_filter(struct ieee80211_local *local) 39 { 40 u64 mc; 41 unsigned int changed_flags; 42 unsigned int new_flags = 0; 43 44 if (atomic_read(&local->iff_allmultis)) 45 new_flags |= FIF_ALLMULTI; 46 47 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 48 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 49 new_flags |= FIF_BCN_PRBRESP_PROMISC; 50 51 if (local->fif_probe_req || local->probe_req_reg) 52 new_flags |= FIF_PROBE_REQ; 53 54 if (local->fif_fcsfail) 55 new_flags |= FIF_FCSFAIL; 56 57 if (local->fif_plcpfail) 58 new_flags |= FIF_PLCPFAIL; 59 60 if (local->fif_control) 61 new_flags |= FIF_CONTROL; 62 63 if (local->fif_other_bss) 64 new_flags |= FIF_OTHER_BSS; 65 66 if (local->fif_pspoll) 67 new_flags |= FIF_PSPOLL; 68 69 spin_lock_bh(&local->filter_lock); 70 changed_flags = local->filter_flags ^ new_flags; 71 72 mc = drv_prepare_multicast(local, &local->mc_list); 73 spin_unlock_bh(&local->filter_lock); 74 75 /* be a bit nasty */ 76 new_flags |= (1<<31); 77 78 drv_configure_filter(local, changed_flags, &new_flags, mc); 79 80 WARN_ON(new_flags & (1<<31)); 81 82 local->filter_flags = new_flags & ~(1<<31); 83 } 84 85 static void ieee80211_reconfig_filter(struct work_struct *work) 86 { 87 struct ieee80211_local *local = 88 container_of(work, struct ieee80211_local, reconfig_filter); 89 90 ieee80211_configure_filter(local); 91 } 92 93 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 94 { 95 struct ieee80211_sub_if_data *sdata; 96 struct cfg80211_chan_def chandef = {}; 97 u32 changed = 0; 98 int power; 99 u32 offchannel_flag; 100 101 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 102 103 if (local->scan_chandef.chan) { 104 chandef = local->scan_chandef; 105 } else if (local->tmp_channel) { 106 chandef.chan = local->tmp_channel; 107 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 108 chandef.center_freq1 = chandef.chan->center_freq; 109 } else 110 chandef = local->_oper_chandef; 111 112 WARN(!cfg80211_chandef_valid(&chandef), 113 "control:%d MHz width:%d center: %d/%d MHz", 114 chandef.chan->center_freq, chandef.width, 115 chandef.center_freq1, chandef.center_freq2); 116 117 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 118 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 119 else 120 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 121 122 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 123 124 if (offchannel_flag || 125 !cfg80211_chandef_identical(&local->hw.conf.chandef, 126 &local->_oper_chandef)) { 127 local->hw.conf.chandef = chandef; 128 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 129 } 130 131 if (!conf_is_ht(&local->hw.conf)) { 132 /* 133 * mac80211.h documents that this is only valid 134 * when the channel is set to an HT type, and 135 * that otherwise STATIC is used. 136 */ 137 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 138 } else if (local->hw.conf.smps_mode != local->smps_mode) { 139 local->hw.conf.smps_mode = local->smps_mode; 140 changed |= IEEE80211_CONF_CHANGE_SMPS; 141 } 142 143 power = ieee80211_chandef_max_power(&chandef); 144 145 rcu_read_lock(); 146 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 147 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 148 continue; 149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 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 || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 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 struct ieee80211_sub_if_data *sdata; 250 251 /* wait for scan work complete */ 252 flush_workqueue(local->workqueue); 253 flush_work(&local->sched_scan_stopped_work); 254 255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 256 "%s called with hardware scan in progress\n", __func__); 257 258 flush_work(&local->radar_detected_work); 259 rtnl_lock(); 260 list_for_each_entry(sdata, &local->interfaces, list) { 261 /* 262 * XXX: there may be more work for other vif types and even 263 * for station mode: a good thing would be to run most of 264 * the iface type's dependent _stop (ieee80211_mg_stop, 265 * ieee80211_ibss_stop) etc... 266 * For now, fix only the specific bug that was seen: race 267 * between csa_connection_drop_work and us. 268 */ 269 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 270 /* 271 * This worker is scheduled from the iface worker that 272 * runs on mac80211's workqueue, so we can't be 273 * scheduling this worker after the cancel right here. 274 * The exception is ieee80211_chswitch_done. 275 * Then we can have a race... 276 */ 277 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 278 } 279 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 280 } 281 ieee80211_scan_cancel(local); 282 283 /* make sure any new ROC will consider local->in_reconfig */ 284 flush_delayed_work(&local->roc_work); 285 flush_work(&local->hw_roc_done); 286 287 /* wait for all packet processing to be done */ 288 synchronize_net(); 289 290 ieee80211_reconfig(local); 291 rtnl_unlock(); 292 } 293 294 void ieee80211_restart_hw(struct ieee80211_hw *hw) 295 { 296 struct ieee80211_local *local = hw_to_local(hw); 297 298 trace_api_restart_hw(local); 299 300 wiphy_info(hw->wiphy, 301 "Hardware restart was requested\n"); 302 303 /* use this reason, ieee80211_reconfig will unblock it */ 304 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 305 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 306 false); 307 308 /* 309 * Stop all Rx during the reconfig. We don't want state changes 310 * or driver callbacks while this is in progress. 311 */ 312 local->in_reconfig = true; 313 barrier(); 314 315 queue_work(system_freezable_wq, &local->restart_work); 316 } 317 EXPORT_SYMBOL(ieee80211_restart_hw); 318 319 #ifdef CONFIG_INET 320 static int ieee80211_ifa_changed(struct notifier_block *nb, 321 unsigned long data, void *arg) 322 { 323 struct in_ifaddr *ifa = arg; 324 struct ieee80211_local *local = 325 container_of(nb, struct ieee80211_local, 326 ifa_notifier); 327 struct net_device *ndev = ifa->ifa_dev->dev; 328 struct wireless_dev *wdev = ndev->ieee80211_ptr; 329 struct in_device *idev; 330 struct ieee80211_sub_if_data *sdata; 331 struct ieee80211_bss_conf *bss_conf; 332 struct ieee80211_if_managed *ifmgd; 333 int c = 0; 334 335 /* Make sure it's our interface that got changed */ 336 if (!wdev) 337 return NOTIFY_DONE; 338 339 if (wdev->wiphy != local->hw.wiphy) 340 return NOTIFY_DONE; 341 342 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 343 bss_conf = &sdata->vif.bss_conf; 344 345 /* ARP filtering is only supported in managed mode */ 346 if (sdata->vif.type != NL80211_IFTYPE_STATION) 347 return NOTIFY_DONE; 348 349 idev = __in_dev_get_rtnl(sdata->dev); 350 if (!idev) 351 return NOTIFY_DONE; 352 353 ifmgd = &sdata->u.mgd; 354 sdata_lock(sdata); 355 356 /* Copy the addresses to the bss_conf list */ 357 ifa = idev->ifa_list; 358 while (ifa) { 359 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 360 bss_conf->arp_addr_list[c] = ifa->ifa_address; 361 ifa = ifa->ifa_next; 362 c++; 363 } 364 365 bss_conf->arp_addr_cnt = c; 366 367 /* Configure driver only if associated (which also implies it is up) */ 368 if (ifmgd->associated) 369 ieee80211_bss_info_change_notify(sdata, 370 BSS_CHANGED_ARP_FILTER); 371 372 sdata_unlock(sdata); 373 374 return NOTIFY_OK; 375 } 376 #endif 377 378 #if IS_ENABLED(CONFIG_IPV6) 379 static int ieee80211_ifa6_changed(struct notifier_block *nb, 380 unsigned long data, void *arg) 381 { 382 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 383 struct inet6_dev *idev = ifa->idev; 384 struct net_device *ndev = ifa->idev->dev; 385 struct ieee80211_local *local = 386 container_of(nb, struct ieee80211_local, ifa6_notifier); 387 struct wireless_dev *wdev = ndev->ieee80211_ptr; 388 struct ieee80211_sub_if_data *sdata; 389 390 /* Make sure it's our interface that got changed */ 391 if (!wdev || wdev->wiphy != local->hw.wiphy) 392 return NOTIFY_DONE; 393 394 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 395 396 /* 397 * For now only support station mode. This is mostly because 398 * doing AP would have to handle AP_VLAN in some way ... 399 */ 400 if (sdata->vif.type != NL80211_IFTYPE_STATION) 401 return NOTIFY_DONE; 402 403 drv_ipv6_addr_change(local, sdata, idev); 404 405 return NOTIFY_OK; 406 } 407 #endif 408 409 /* There isn't a lot of sense in it, but you can transmit anything you like */ 410 static const struct ieee80211_txrx_stypes 411 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 412 [NL80211_IFTYPE_ADHOC] = { 413 .tx = 0xffff, 414 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 415 BIT(IEEE80211_STYPE_AUTH >> 4) | 416 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 417 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 418 }, 419 [NL80211_IFTYPE_STATION] = { 420 .tx = 0xffff, 421 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 422 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 423 }, 424 [NL80211_IFTYPE_AP] = { 425 .tx = 0xffff, 426 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 427 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 428 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 429 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 430 BIT(IEEE80211_STYPE_AUTH >> 4) | 431 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 432 BIT(IEEE80211_STYPE_ACTION >> 4), 433 }, 434 [NL80211_IFTYPE_AP_VLAN] = { 435 /* copy AP */ 436 .tx = 0xffff, 437 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 438 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 440 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 441 BIT(IEEE80211_STYPE_AUTH >> 4) | 442 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 443 BIT(IEEE80211_STYPE_ACTION >> 4), 444 }, 445 [NL80211_IFTYPE_P2P_CLIENT] = { 446 .tx = 0xffff, 447 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 448 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 449 }, 450 [NL80211_IFTYPE_P2P_GO] = { 451 .tx = 0xffff, 452 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 453 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 454 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 455 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 456 BIT(IEEE80211_STYPE_AUTH >> 4) | 457 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 458 BIT(IEEE80211_STYPE_ACTION >> 4), 459 }, 460 [NL80211_IFTYPE_MESH_POINT] = { 461 .tx = 0xffff, 462 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 463 BIT(IEEE80211_STYPE_AUTH >> 4) | 464 BIT(IEEE80211_STYPE_DEAUTH >> 4), 465 }, 466 [NL80211_IFTYPE_P2P_DEVICE] = { 467 .tx = 0xffff, 468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 469 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 470 }, 471 }; 472 473 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 474 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 475 IEEE80211_HT_AMPDU_PARM_DENSITY, 476 477 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 478 IEEE80211_HT_CAP_MAX_AMSDU | 479 IEEE80211_HT_CAP_SGI_20 | 480 IEEE80211_HT_CAP_SGI_40 | 481 IEEE80211_HT_CAP_TX_STBC | 482 IEEE80211_HT_CAP_RX_STBC | 483 IEEE80211_HT_CAP_LDPC_CODING | 484 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 485 .mcs = { 486 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 487 0xff, 0xff, 0xff, 0xff, 0xff, }, 488 }, 489 }; 490 491 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 492 .vht_cap_info = 493 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 494 IEEE80211_VHT_CAP_SHORT_GI_80 | 495 IEEE80211_VHT_CAP_SHORT_GI_160 | 496 IEEE80211_VHT_CAP_RXSTBC_MASK | 497 IEEE80211_VHT_CAP_TXSTBC | 498 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 499 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 500 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 501 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 502 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 503 .supp_mcs = { 504 .rx_mcs_map = cpu_to_le16(~0), 505 .tx_mcs_map = cpu_to_le16(~0), 506 }, 507 }; 508 509 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 510 const struct ieee80211_ops *ops, 511 const char *requested_name) 512 { 513 struct ieee80211_local *local; 514 int priv_size, i; 515 struct wiphy *wiphy; 516 bool use_chanctx; 517 518 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 519 !ops->add_interface || !ops->remove_interface || 520 !ops->configure_filter)) 521 return NULL; 522 523 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 524 return NULL; 525 526 /* check all or no channel context operations exist */ 527 i = !!ops->add_chanctx + !!ops->remove_chanctx + 528 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 529 !!ops->unassign_vif_chanctx; 530 if (WARN_ON(i != 0 && i != 5)) 531 return NULL; 532 use_chanctx = i == 5; 533 534 /* Ensure 32-byte alignment of our private data and hw private data. 535 * We use the wiphy priv data for both our ieee80211_local and for 536 * the driver's private data 537 * 538 * In memory it'll be like this: 539 * 540 * +-------------------------+ 541 * | struct wiphy | 542 * +-------------------------+ 543 * | struct ieee80211_local | 544 * +-------------------------+ 545 * | driver's private data | 546 * +-------------------------+ 547 * 548 */ 549 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 550 551 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 552 553 if (!wiphy) 554 return NULL; 555 556 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 557 558 wiphy->privid = mac80211_wiphy_privid; 559 560 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 561 WIPHY_FLAG_4ADDR_AP | 562 WIPHY_FLAG_4ADDR_STATION | 563 WIPHY_FLAG_REPORTS_OBSS | 564 WIPHY_FLAG_OFFCHAN_TX; 565 566 if (ops->remain_on_channel) 567 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 568 569 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 570 NL80211_FEATURE_SAE | 571 NL80211_FEATURE_HT_IBSS | 572 NL80211_FEATURE_VIF_TXPOWER | 573 NL80211_FEATURE_MAC_ON_CREATE | 574 NL80211_FEATURE_USERSPACE_MPM | 575 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 576 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 577 wiphy_ext_feature_set(wiphy, 578 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 579 580 if (!ops->hw_scan) { 581 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 582 NL80211_FEATURE_AP_SCAN; 583 /* 584 * if the driver behaves correctly using the probe request 585 * (template) from mac80211, then both of these should be 586 * supported even with hw scan - but let drivers opt in. 587 */ 588 wiphy_ext_feature_set(wiphy, 589 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 590 wiphy_ext_feature_set(wiphy, 591 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 592 } 593 594 if (!ops->set_key) 595 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 596 597 if (ops->wake_tx_queue) 598 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 599 600 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 601 602 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 603 604 local = wiphy_priv(wiphy); 605 606 if (sta_info_init(local)) 607 goto err_free; 608 609 local->hw.wiphy = wiphy; 610 611 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 612 613 local->ops = ops; 614 local->use_chanctx = use_chanctx; 615 616 /* 617 * We need a bit of data queued to build aggregates properly, so 618 * instruct the TCP stack to allow more than a single ms of data 619 * to be queued in the stack. The value is a bit-shift of 1 620 * second, so 7 is ~8ms of queued data. Only affects local TCP 621 * sockets. 622 * This is the default, anyhow - drivers may need to override it 623 * for local reasons (longer buffers, longer completion time, or 624 * similar). 625 */ 626 local->hw.tx_sk_pacing_shift = 7; 627 628 /* set up some defaults */ 629 local->hw.queues = 1; 630 local->hw.max_rates = 1; 631 local->hw.max_report_rates = 0; 632 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 633 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 634 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 635 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 636 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 637 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 638 IEEE80211_RADIOTAP_MCS_HAVE_GI | 639 IEEE80211_RADIOTAP_MCS_HAVE_BW; 640 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 641 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 642 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 643 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 644 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 645 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 646 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 647 648 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 649 650 wiphy->extended_capabilities = local->ext_capa; 651 wiphy->extended_capabilities_mask = local->ext_capa; 652 wiphy->extended_capabilities_len = 653 ARRAY_SIZE(local->ext_capa); 654 655 INIT_LIST_HEAD(&local->interfaces); 656 INIT_LIST_HEAD(&local->mon_list); 657 658 __hw_addr_init(&local->mc_list); 659 660 mutex_init(&local->iflist_mtx); 661 mutex_init(&local->mtx); 662 663 mutex_init(&local->key_mtx); 664 spin_lock_init(&local->filter_lock); 665 spin_lock_init(&local->rx_path_lock); 666 spin_lock_init(&local->queue_stop_reason_lock); 667 668 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 669 INIT_LIST_HEAD(&local->active_txqs[i]); 670 spin_lock_init(&local->active_txq_lock[i]); 671 } 672 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 673 674 INIT_LIST_HEAD(&local->chanctx_list); 675 mutex_init(&local->chanctx_mtx); 676 677 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 678 679 INIT_WORK(&local->restart_work, ieee80211_restart_work); 680 681 INIT_WORK(&local->radar_detected_work, 682 ieee80211_dfs_radar_detected_work); 683 684 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 685 local->smps_mode = IEEE80211_SMPS_OFF; 686 687 INIT_WORK(&local->dynamic_ps_enable_work, 688 ieee80211_dynamic_ps_enable_work); 689 INIT_WORK(&local->dynamic_ps_disable_work, 690 ieee80211_dynamic_ps_disable_work); 691 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 692 693 INIT_WORK(&local->sched_scan_stopped_work, 694 ieee80211_sched_scan_stopped_work); 695 696 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 697 698 spin_lock_init(&local->ack_status_lock); 699 idr_init(&local->ack_status_frames); 700 701 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 702 skb_queue_head_init(&local->pending[i]); 703 atomic_set(&local->agg_queue_stop[i], 0); 704 } 705 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 706 (unsigned long)local); 707 708 if (ops->wake_tx_queue) 709 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs, 710 (unsigned long)local); 711 712 tasklet_init(&local->tasklet, 713 ieee80211_tasklet_handler, 714 (unsigned long) local); 715 716 skb_queue_head_init(&local->skb_queue); 717 skb_queue_head_init(&local->skb_queue_unreliable); 718 skb_queue_head_init(&local->skb_queue_tdls_chsw); 719 720 ieee80211_alloc_led_names(local); 721 722 ieee80211_roc_setup(local); 723 724 local->hw.radiotap_timestamp.units_pos = -1; 725 local->hw.radiotap_timestamp.accuracy = -1; 726 727 return &local->hw; 728 err_free: 729 wiphy_free(wiphy); 730 return NULL; 731 } 732 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 733 734 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 735 { 736 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 737 IS_ERR(local->wep_rx_tfm)); 738 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 739 int n_suites = 0, r = 0, w = 0; 740 u32 *suites; 741 static const u32 cipher_suites[] = { 742 /* keep WEP first, it may be removed below */ 743 WLAN_CIPHER_SUITE_WEP40, 744 WLAN_CIPHER_SUITE_WEP104, 745 WLAN_CIPHER_SUITE_TKIP, 746 WLAN_CIPHER_SUITE_CCMP, 747 WLAN_CIPHER_SUITE_CCMP_256, 748 WLAN_CIPHER_SUITE_GCMP, 749 WLAN_CIPHER_SUITE_GCMP_256, 750 751 /* keep last -- depends on hw flags! */ 752 WLAN_CIPHER_SUITE_AES_CMAC, 753 WLAN_CIPHER_SUITE_BIP_CMAC_256, 754 WLAN_CIPHER_SUITE_BIP_GMAC_128, 755 WLAN_CIPHER_SUITE_BIP_GMAC_256, 756 }; 757 758 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 759 local->hw.wiphy->cipher_suites) { 760 /* If the driver advertises, or doesn't support SW crypto, 761 * we only need to remove WEP if necessary. 762 */ 763 if (have_wep) 764 return 0; 765 766 /* well if it has _no_ ciphers ... fine */ 767 if (!local->hw.wiphy->n_cipher_suites) 768 return 0; 769 770 /* Driver provides cipher suites, but we need to exclude WEP */ 771 suites = kmemdup(local->hw.wiphy->cipher_suites, 772 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 773 GFP_KERNEL); 774 if (!suites) 775 return -ENOMEM; 776 777 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 778 u32 suite = local->hw.wiphy->cipher_suites[r]; 779 780 if (suite == WLAN_CIPHER_SUITE_WEP40 || 781 suite == WLAN_CIPHER_SUITE_WEP104) 782 continue; 783 suites[w++] = suite; 784 } 785 } else if (!local->hw.cipher_schemes) { 786 /* If the driver doesn't have cipher schemes, there's nothing 787 * else to do other than assign the (software supported and 788 * perhaps offloaded) cipher suites. 789 */ 790 local->hw.wiphy->cipher_suites = cipher_suites; 791 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 792 793 if (!have_mfp) 794 local->hw.wiphy->n_cipher_suites -= 4; 795 796 if (!have_wep) { 797 local->hw.wiphy->cipher_suites += 2; 798 local->hw.wiphy->n_cipher_suites -= 2; 799 } 800 801 /* not dynamically allocated, so just return */ 802 return 0; 803 } else { 804 const struct ieee80211_cipher_scheme *cs; 805 806 cs = local->hw.cipher_schemes; 807 808 /* Driver specifies cipher schemes only (but not cipher suites 809 * including the schemes) 810 * 811 * We start counting ciphers defined by schemes, TKIP, CCMP, 812 * CCMP-256, GCMP, and GCMP-256 813 */ 814 n_suites = local->hw.n_cipher_schemes + 5; 815 816 /* check if we have WEP40 and WEP104 */ 817 if (have_wep) 818 n_suites += 2; 819 820 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 821 * BIP-GMAC-256 822 */ 823 if (have_mfp) 824 n_suites += 4; 825 826 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 827 if (!suites) 828 return -ENOMEM; 829 830 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 831 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 832 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 833 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 834 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 835 836 if (have_wep) { 837 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 838 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 839 } 840 841 if (have_mfp) { 842 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 843 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 844 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 845 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 846 } 847 848 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 849 suites[w++] = cs[r].cipher; 850 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 851 kfree(suites); 852 return -EINVAL; 853 } 854 } 855 } 856 857 local->hw.wiphy->cipher_suites = suites; 858 local->hw.wiphy->n_cipher_suites = w; 859 local->wiphy_ciphers_allocated = true; 860 861 return 0; 862 } 863 864 int ieee80211_register_hw(struct ieee80211_hw *hw) 865 { 866 struct ieee80211_local *local = hw_to_local(hw); 867 int result, i; 868 enum nl80211_band band; 869 int channels, max_bitrates; 870 bool supp_ht, supp_vht, supp_he; 871 netdev_features_t feature_whitelist; 872 struct cfg80211_chan_def dflt_chandef = {}; 873 874 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 875 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 876 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 877 return -EINVAL; 878 879 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 880 (!local->ops->tdls_channel_switch || 881 !local->ops->tdls_cancel_channel_switch || 882 !local->ops->tdls_recv_channel_switch)) 883 return -EOPNOTSUPP; 884 885 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 886 !local->ops->set_frag_threshold)) 887 return -EINVAL; 888 889 if (WARN_ON(local->hw.wiphy->interface_modes & 890 BIT(NL80211_IFTYPE_NAN) && 891 (!local->ops->start_nan || !local->ops->stop_nan))) 892 return -EINVAL; 893 894 #ifdef CONFIG_PM 895 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 896 return -EINVAL; 897 #endif 898 899 if (!local->use_chanctx) { 900 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 901 const struct ieee80211_iface_combination *comb; 902 903 comb = &local->hw.wiphy->iface_combinations[i]; 904 905 if (comb->num_different_channels > 1) 906 return -EINVAL; 907 } 908 } else { 909 /* 910 * WDS is currently prohibited when channel contexts are used 911 * because there's no clear definition of which channel WDS 912 * type interfaces use 913 */ 914 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 915 return -EINVAL; 916 917 /* DFS is not supported with multi-channel combinations yet */ 918 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 919 const struct ieee80211_iface_combination *comb; 920 921 comb = &local->hw.wiphy->iface_combinations[i]; 922 923 if (comb->radar_detect_widths && 924 comb->num_different_channels > 1) 925 return -EINVAL; 926 } 927 } 928 929 /* Only HW csum features are currently compatible with mac80211 */ 930 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 931 NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA | 932 NETIF_F_GSO_SOFTWARE | NETIF_F_RXCSUM; 933 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 934 return -EINVAL; 935 936 if (hw->max_report_rates == 0) 937 hw->max_report_rates = hw->max_rates; 938 939 local->rx_chains = 1; 940 941 /* 942 * generic code guarantees at least one band, 943 * set this very early because much code assumes 944 * that hw.conf.channel is assigned 945 */ 946 channels = 0; 947 max_bitrates = 0; 948 supp_ht = false; 949 supp_vht = false; 950 supp_he = false; 951 for (band = 0; band < NUM_NL80211_BANDS; band++) { 952 struct ieee80211_supported_band *sband; 953 954 sband = local->hw.wiphy->bands[band]; 955 if (!sband) 956 continue; 957 958 if (!dflt_chandef.chan) { 959 cfg80211_chandef_create(&dflt_chandef, 960 &sband->channels[0], 961 NL80211_CHAN_NO_HT); 962 /* init channel we're on */ 963 if (!local->use_chanctx && !local->_oper_chandef.chan) { 964 local->hw.conf.chandef = dflt_chandef; 965 local->_oper_chandef = dflt_chandef; 966 } 967 local->monitor_chandef = dflt_chandef; 968 } 969 970 channels += sband->n_channels; 971 972 if (max_bitrates < sband->n_bitrates) 973 max_bitrates = sband->n_bitrates; 974 supp_ht = supp_ht || sband->ht_cap.ht_supported; 975 supp_vht = supp_vht || sband->vht_cap.vht_supported; 976 977 if (!supp_he) 978 supp_he = !!ieee80211_get_he_sta_cap(sband); 979 980 if (!sband->ht_cap.ht_supported) 981 continue; 982 983 /* TODO: consider VHT for RX chains, hopefully it's the same */ 984 local->rx_chains = 985 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 986 local->rx_chains); 987 988 /* no need to mask, SM_PS_DISABLED has all bits set */ 989 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 990 IEEE80211_HT_CAP_SM_PS_SHIFT; 991 } 992 993 /* if low-level driver supports AP, we also support VLAN. 994 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 995 * based on their support to transmit SW encrypted packets. 996 */ 997 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 998 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 999 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1000 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1001 } 1002 1003 /* mac80211 always supports monitor */ 1004 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1005 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1006 1007 /* mac80211 doesn't support more than one IBSS interface right now */ 1008 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1009 const struct ieee80211_iface_combination *c; 1010 int j; 1011 1012 c = &hw->wiphy->iface_combinations[i]; 1013 1014 for (j = 0; j < c->n_limits; j++) 1015 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1016 c->limits[j].max > 1) 1017 return -EINVAL; 1018 } 1019 1020 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1021 sizeof(void *) * channels, GFP_KERNEL); 1022 if (!local->int_scan_req) 1023 return -ENOMEM; 1024 1025 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1026 if (!local->hw.wiphy->bands[band]) 1027 continue; 1028 local->int_scan_req->rates[band] = (u32) -1; 1029 } 1030 1031 #ifndef CONFIG_MAC80211_MESH 1032 /* mesh depends on Kconfig, but drivers should set it if they want */ 1033 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1034 #endif 1035 1036 /* if the underlying driver supports mesh, mac80211 will (at least) 1037 * provide routing of mesh authentication frames to userspace */ 1038 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1039 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1040 1041 /* mac80211 supports control port protocol changing */ 1042 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1043 1044 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1045 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1046 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1047 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1048 if (hw->max_signal <= 0) { 1049 result = -EINVAL; 1050 goto fail_wiphy_register; 1051 } 1052 } 1053 1054 /* Enable Extended Key IDs when driver allowed it, or when it 1055 * supports neither HW crypto nor A-MPDUs 1056 */ 1057 if ((!local->ops->set_key && 1058 !ieee80211_hw_check(hw, AMPDU_AGGREGATION)) || 1059 ieee80211_hw_check(&local->hw, EXT_KEY_ID_NATIVE)) 1060 wiphy_ext_feature_set(local->hw.wiphy, 1061 NL80211_EXT_FEATURE_EXT_KEY_ID); 1062 1063 /* Mac80211 and therefore all cards only using SW crypto are able to 1064 * handle PTK rekeys correctly 1065 */ 1066 if (!local->ops->set_key) 1067 wiphy_ext_feature_set(local->hw.wiphy, 1068 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1069 1070 /* 1071 * Calculate scan IE length -- we need this to alloc 1072 * memory and to subtract from the driver limit. It 1073 * includes the DS Params, (extended) supported rates, and HT 1074 * information -- SSID is the driver's responsibility. 1075 */ 1076 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1077 3 /* DS Params */; 1078 if (supp_ht) 1079 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1080 1081 if (supp_vht) 1082 local->scan_ies_len += 1083 2 + sizeof(struct ieee80211_vht_cap); 1084 1085 /* HE cap element is variable in size - set len to allow max size */ 1086 /* 1087 * TODO: 1 is added at the end of the calculation to accommodate for 1088 * the temporary placing of the HE capabilities IE under EXT. 1089 * Remove it once it is placed in the final place. 1090 */ 1091 if (supp_he) 1092 local->scan_ies_len += 1093 2 + sizeof(struct ieee80211_he_cap_elem) + 1094 sizeof(struct ieee80211_he_mcs_nss_supp) + 1095 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1096 1097 if (!local->ops->hw_scan) { 1098 /* For hw_scan, driver needs to set these up. */ 1099 local->hw.wiphy->max_scan_ssids = 4; 1100 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1101 } 1102 1103 /* 1104 * If the driver supports any scan IEs, then assume the 1105 * limit includes the IEs mac80211 will add, otherwise 1106 * leave it at zero and let the driver sort it out; we 1107 * still pass our IEs to the driver but userspace will 1108 * not be allowed to in that case. 1109 */ 1110 if (local->hw.wiphy->max_scan_ie_len) 1111 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1112 1113 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1114 local->hw.n_cipher_schemes)); 1115 1116 result = ieee80211_init_cipher_suites(local); 1117 if (result < 0) 1118 goto fail_wiphy_register; 1119 1120 if (!local->ops->remain_on_channel) 1121 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1122 1123 /* mac80211 based drivers don't support internal TDLS setup */ 1124 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1125 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1126 1127 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1128 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1129 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1130 1131 /* mac80211 supports multi BSSID, if the driver supports it */ 1132 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1133 local->hw.wiphy->support_mbssid = true; 1134 if (ieee80211_hw_check(&local->hw, 1135 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1136 local->hw.wiphy->support_only_he_mbssid = true; 1137 else 1138 local->ext_capa[2] |= 1139 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1140 } 1141 1142 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1143 1144 result = wiphy_register(local->hw.wiphy); 1145 if (result < 0) 1146 goto fail_wiphy_register; 1147 1148 /* 1149 * We use the number of queues for feature tests (QoS, HT) internally 1150 * so restrict them appropriately. 1151 */ 1152 if (hw->queues > IEEE80211_MAX_QUEUES) 1153 hw->queues = IEEE80211_MAX_QUEUES; 1154 1155 local->workqueue = 1156 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1157 if (!local->workqueue) { 1158 result = -ENOMEM; 1159 goto fail_workqueue; 1160 } 1161 1162 /* 1163 * The hardware needs headroom for sending the frame, 1164 * and we need some headroom for passing the frame to monitor 1165 * interfaces, but never both at the same time. 1166 */ 1167 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1168 IEEE80211_TX_STATUS_HEADROOM); 1169 1170 debugfs_hw_add(local); 1171 1172 /* 1173 * if the driver doesn't specify a max listen interval we 1174 * use 5 which should be a safe default 1175 */ 1176 if (local->hw.max_listen_interval == 0) 1177 local->hw.max_listen_interval = 5; 1178 1179 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1180 1181 local->dynamic_ps_forced_timeout = -1; 1182 1183 if (!local->hw.max_nan_de_entries) 1184 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1185 1186 if (!local->hw.weight_multiplier) 1187 local->hw.weight_multiplier = 1; 1188 1189 result = ieee80211_wep_init(local); 1190 if (result < 0) 1191 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1192 result); 1193 1194 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1195 1196 ieee80211_led_init(local); 1197 1198 result = ieee80211_txq_setup_flows(local); 1199 if (result) 1200 goto fail_flows; 1201 1202 rtnl_lock(); 1203 1204 result = ieee80211_init_rate_ctrl_alg(local, 1205 hw->rate_control_algorithm); 1206 if (result < 0) { 1207 wiphy_debug(local->hw.wiphy, 1208 "Failed to initialize rate control algorithm\n"); 1209 goto fail_rate; 1210 } 1211 1212 if (local->rate_ctrl) { 1213 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1214 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1215 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1216 } 1217 1218 /* 1219 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1220 * or have it when we don't, copy the sband structure and set/clear it. 1221 * This is necessary because rate scaling algorithms could be switched 1222 * and have different support values. 1223 * Print a message so that in the common case the reallocation can be 1224 * avoided. 1225 */ 1226 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1227 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1228 struct ieee80211_supported_band *sband; 1229 bool local_cap, ie_cap; 1230 1231 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1232 1233 sband = local->hw.wiphy->bands[band]; 1234 if (!sband || !sband->vht_cap.vht_supported) 1235 continue; 1236 1237 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1238 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1239 1240 if (local_cap == ie_cap) 1241 continue; 1242 1243 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1244 if (!sband) { 1245 result = -ENOMEM; 1246 goto fail_rate; 1247 } 1248 1249 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1250 band); 1251 1252 sband->vht_cap.vht_mcs.tx_highest ^= 1253 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1254 1255 local->hw.wiphy->bands[band] = sband; 1256 local->sband_allocated |= BIT(band); 1257 } 1258 1259 /* add one default STA interface if supported */ 1260 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1261 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1262 struct vif_params params = {0}; 1263 1264 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1265 NL80211_IFTYPE_STATION, ¶ms); 1266 if (result) 1267 wiphy_warn(local->hw.wiphy, 1268 "Failed to add default virtual iface\n"); 1269 } 1270 1271 rtnl_unlock(); 1272 1273 #ifdef CONFIG_INET 1274 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1275 result = register_inetaddr_notifier(&local->ifa_notifier); 1276 if (result) 1277 goto fail_ifa; 1278 #endif 1279 1280 #if IS_ENABLED(CONFIG_IPV6) 1281 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1282 result = register_inet6addr_notifier(&local->ifa6_notifier); 1283 if (result) 1284 goto fail_ifa6; 1285 #endif 1286 1287 return 0; 1288 1289 #if IS_ENABLED(CONFIG_IPV6) 1290 fail_ifa6: 1291 #ifdef CONFIG_INET 1292 unregister_inetaddr_notifier(&local->ifa_notifier); 1293 #endif 1294 #endif 1295 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1296 fail_ifa: 1297 #endif 1298 rtnl_lock(); 1299 rate_control_deinitialize(local); 1300 ieee80211_remove_interfaces(local); 1301 fail_rate: 1302 rtnl_unlock(); 1303 ieee80211_led_exit(local); 1304 ieee80211_wep_free(local); 1305 fail_flows: 1306 destroy_workqueue(local->workqueue); 1307 fail_workqueue: 1308 wiphy_unregister(local->hw.wiphy); 1309 fail_wiphy_register: 1310 if (local->wiphy_ciphers_allocated) 1311 kfree(local->hw.wiphy->cipher_suites); 1312 kfree(local->int_scan_req); 1313 return result; 1314 } 1315 EXPORT_SYMBOL(ieee80211_register_hw); 1316 1317 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1318 { 1319 struct ieee80211_local *local = hw_to_local(hw); 1320 1321 tasklet_kill(&local->tx_pending_tasklet); 1322 tasklet_kill(&local->tasklet); 1323 1324 #ifdef CONFIG_INET 1325 unregister_inetaddr_notifier(&local->ifa_notifier); 1326 #endif 1327 #if IS_ENABLED(CONFIG_IPV6) 1328 unregister_inet6addr_notifier(&local->ifa6_notifier); 1329 #endif 1330 1331 rtnl_lock(); 1332 1333 /* 1334 * At this point, interface list manipulations are fine 1335 * because the driver cannot be handing us frames any 1336 * more and the tasklet is killed. 1337 */ 1338 ieee80211_remove_interfaces(local); 1339 1340 rtnl_unlock(); 1341 1342 cancel_delayed_work_sync(&local->roc_work); 1343 cancel_work_sync(&local->restart_work); 1344 cancel_work_sync(&local->reconfig_filter); 1345 cancel_work_sync(&local->tdls_chsw_work); 1346 flush_work(&local->sched_scan_stopped_work); 1347 flush_work(&local->radar_detected_work); 1348 1349 ieee80211_clear_tx_pending(local); 1350 rate_control_deinitialize(local); 1351 1352 if (skb_queue_len(&local->skb_queue) || 1353 skb_queue_len(&local->skb_queue_unreliable)) 1354 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1355 skb_queue_purge(&local->skb_queue); 1356 skb_queue_purge(&local->skb_queue_unreliable); 1357 skb_queue_purge(&local->skb_queue_tdls_chsw); 1358 1359 destroy_workqueue(local->workqueue); 1360 wiphy_unregister(local->hw.wiphy); 1361 ieee80211_wep_free(local); 1362 ieee80211_led_exit(local); 1363 kfree(local->int_scan_req); 1364 } 1365 EXPORT_SYMBOL(ieee80211_unregister_hw); 1366 1367 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1368 { 1369 WARN_ONCE(1, "Have pending ack frames!\n"); 1370 kfree_skb(p); 1371 return 0; 1372 } 1373 1374 void ieee80211_free_hw(struct ieee80211_hw *hw) 1375 { 1376 struct ieee80211_local *local = hw_to_local(hw); 1377 enum nl80211_band band; 1378 1379 mutex_destroy(&local->iflist_mtx); 1380 mutex_destroy(&local->mtx); 1381 1382 if (local->wiphy_ciphers_allocated) 1383 kfree(local->hw.wiphy->cipher_suites); 1384 1385 idr_for_each(&local->ack_status_frames, 1386 ieee80211_free_ack_frame, NULL); 1387 idr_destroy(&local->ack_status_frames); 1388 1389 sta_info_stop(local); 1390 1391 ieee80211_free_led_names(local); 1392 1393 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1394 if (!(local->sband_allocated & BIT(band))) 1395 continue; 1396 kfree(local->hw.wiphy->bands[band]); 1397 } 1398 1399 wiphy_free(local->hw.wiphy); 1400 } 1401 EXPORT_SYMBOL(ieee80211_free_hw); 1402 1403 static int __init ieee80211_init(void) 1404 { 1405 struct sk_buff *skb; 1406 int ret; 1407 1408 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1409 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1410 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1411 1412 ret = rc80211_minstrel_init(); 1413 if (ret) 1414 return ret; 1415 1416 ret = ieee80211_iface_init(); 1417 if (ret) 1418 goto err_netdev; 1419 1420 return 0; 1421 err_netdev: 1422 rc80211_minstrel_exit(); 1423 1424 return ret; 1425 } 1426 1427 static void __exit ieee80211_exit(void) 1428 { 1429 rc80211_minstrel_exit(); 1430 1431 ieee80211s_stop(); 1432 1433 ieee80211_iface_exit(); 1434 1435 rcu_barrier(); 1436 } 1437 1438 1439 subsys_initcall(ieee80211_init); 1440 module_exit(ieee80211_exit); 1441 1442 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1443 MODULE_LICENSE("GPL"); 1444