1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018 - 2019 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.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 "debugfs.h" 35 36 void ieee80211_configure_filter(struct ieee80211_local *local) 37 { 38 u64 mc; 39 unsigned int changed_flags; 40 unsigned int new_flags = 0; 41 42 if (atomic_read(&local->iff_allmultis)) 43 new_flags |= FIF_ALLMULTI; 44 45 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 46 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 47 new_flags |= FIF_BCN_PRBRESP_PROMISC; 48 49 if (local->fif_probe_req || local->probe_req_reg) 50 new_flags |= FIF_PROBE_REQ; 51 52 if (local->fif_fcsfail) 53 new_flags |= FIF_FCSFAIL; 54 55 if (local->fif_plcpfail) 56 new_flags |= FIF_PLCPFAIL; 57 58 if (local->fif_control) 59 new_flags |= FIF_CONTROL; 60 61 if (local->fif_other_bss) 62 new_flags |= FIF_OTHER_BSS; 63 64 if (local->fif_pspoll) 65 new_flags |= FIF_PSPOLL; 66 67 spin_lock_bh(&local->filter_lock); 68 changed_flags = local->filter_flags ^ new_flags; 69 70 mc = drv_prepare_multicast(local, &local->mc_list); 71 spin_unlock_bh(&local->filter_lock); 72 73 /* be a bit nasty */ 74 new_flags |= (1<<31); 75 76 drv_configure_filter(local, changed_flags, &new_flags, mc); 77 78 WARN_ON(new_flags & (1<<31)); 79 80 local->filter_flags = new_flags & ~(1<<31); 81 } 82 83 static void ieee80211_reconfig_filter(struct work_struct *work) 84 { 85 struct ieee80211_local *local = 86 container_of(work, struct ieee80211_local, reconfig_filter); 87 88 ieee80211_configure_filter(local); 89 } 90 91 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 92 { 93 struct ieee80211_sub_if_data *sdata; 94 struct cfg80211_chan_def chandef = {}; 95 u32 changed = 0; 96 int power; 97 u32 offchannel_flag; 98 99 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 100 101 if (local->scan_chandef.chan) { 102 chandef = local->scan_chandef; 103 } else if (local->tmp_channel) { 104 chandef.chan = local->tmp_channel; 105 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 106 chandef.center_freq1 = chandef.chan->center_freq; 107 } else 108 chandef = local->_oper_chandef; 109 110 WARN(!cfg80211_chandef_valid(&chandef), 111 "control:%d MHz width:%d center: %d/%d MHz", 112 chandef.chan->center_freq, chandef.width, 113 chandef.center_freq1, chandef.center_freq2); 114 115 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 116 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 117 else 118 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 119 120 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 121 122 if (offchannel_flag || 123 !cfg80211_chandef_identical(&local->hw.conf.chandef, 124 &local->_oper_chandef)) { 125 local->hw.conf.chandef = chandef; 126 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 127 } 128 129 if (!conf_is_ht(&local->hw.conf)) { 130 /* 131 * mac80211.h documents that this is only valid 132 * when the channel is set to an HT type, and 133 * that otherwise STATIC is used. 134 */ 135 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 136 } else if (local->hw.conf.smps_mode != local->smps_mode) { 137 local->hw.conf.smps_mode = local->smps_mode; 138 changed |= IEEE80211_CONF_CHANGE_SMPS; 139 } 140 141 power = ieee80211_chandef_max_power(&chandef); 142 143 rcu_read_lock(); 144 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 145 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 146 continue; 147 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 148 continue; 149 if (sdata->vif.bss_conf.txpower == INT_MIN) 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 = rtnl_dereference(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 = rtnl_dereference(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 /* 422 * To support Pre Association Security Negotiation (PASN) while 423 * already associated to one AP, allow user space to register to 424 * Rx authentication frames, so that the user space logic would 425 * be able to receive/handle authentication frames from a 426 * different AP as part of PASN. 427 * It is expected that user space would intelligently register 428 * for Rx authentication frames, i.e., only when PASN is used 429 * and configure a match filter only for PASN authentication 430 * algorithm, as otherwise the MLME functionality of mac80211 431 * would be broken. 432 */ 433 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 434 BIT(IEEE80211_STYPE_AUTH >> 4) | 435 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 436 }, 437 [NL80211_IFTYPE_AP] = { 438 .tx = 0xffff, 439 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 440 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 441 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 442 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 443 BIT(IEEE80211_STYPE_AUTH >> 4) | 444 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 445 BIT(IEEE80211_STYPE_ACTION >> 4), 446 }, 447 [NL80211_IFTYPE_AP_VLAN] = { 448 /* copy AP */ 449 .tx = 0xffff, 450 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 451 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 452 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 453 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 454 BIT(IEEE80211_STYPE_AUTH >> 4) | 455 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 456 BIT(IEEE80211_STYPE_ACTION >> 4), 457 }, 458 [NL80211_IFTYPE_P2P_CLIENT] = { 459 .tx = 0xffff, 460 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 462 }, 463 [NL80211_IFTYPE_P2P_GO] = { 464 .tx = 0xffff, 465 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 466 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 467 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 468 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 469 BIT(IEEE80211_STYPE_AUTH >> 4) | 470 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 471 BIT(IEEE80211_STYPE_ACTION >> 4), 472 }, 473 [NL80211_IFTYPE_MESH_POINT] = { 474 .tx = 0xffff, 475 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 476 BIT(IEEE80211_STYPE_AUTH >> 4) | 477 BIT(IEEE80211_STYPE_DEAUTH >> 4), 478 }, 479 [NL80211_IFTYPE_P2P_DEVICE] = { 480 .tx = 0xffff, 481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 483 }, 484 }; 485 486 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 487 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 488 IEEE80211_HT_AMPDU_PARM_DENSITY, 489 490 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 491 IEEE80211_HT_CAP_MAX_AMSDU | 492 IEEE80211_HT_CAP_SGI_20 | 493 IEEE80211_HT_CAP_SGI_40 | 494 IEEE80211_HT_CAP_TX_STBC | 495 IEEE80211_HT_CAP_RX_STBC | 496 IEEE80211_HT_CAP_LDPC_CODING | 497 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 498 .mcs = { 499 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 500 0xff, 0xff, 0xff, 0xff, 0xff, }, 501 }, 502 }; 503 504 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 505 .vht_cap_info = 506 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 507 IEEE80211_VHT_CAP_SHORT_GI_80 | 508 IEEE80211_VHT_CAP_SHORT_GI_160 | 509 IEEE80211_VHT_CAP_RXSTBC_MASK | 510 IEEE80211_VHT_CAP_TXSTBC | 511 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 512 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 513 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 514 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 515 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 516 .supp_mcs = { 517 .rx_mcs_map = cpu_to_le16(~0), 518 .tx_mcs_map = cpu_to_le16(~0), 519 }, 520 }; 521 522 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 523 const struct ieee80211_ops *ops, 524 const char *requested_name) 525 { 526 struct ieee80211_local *local; 527 int priv_size, i; 528 struct wiphy *wiphy; 529 bool use_chanctx; 530 531 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 532 !ops->add_interface || !ops->remove_interface || 533 !ops->configure_filter)) 534 return NULL; 535 536 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 537 return NULL; 538 539 /* check all or no channel context operations exist */ 540 i = !!ops->add_chanctx + !!ops->remove_chanctx + 541 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 542 !!ops->unassign_vif_chanctx; 543 if (WARN_ON(i != 0 && i != 5)) 544 return NULL; 545 use_chanctx = i == 5; 546 547 /* Ensure 32-byte alignment of our private data and hw private data. 548 * We use the wiphy priv data for both our ieee80211_local and for 549 * the driver's private data 550 * 551 * In memory it'll be like this: 552 * 553 * +-------------------------+ 554 * | struct wiphy | 555 * +-------------------------+ 556 * | struct ieee80211_local | 557 * +-------------------------+ 558 * | driver's private data | 559 * +-------------------------+ 560 * 561 */ 562 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 563 564 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 565 566 if (!wiphy) 567 return NULL; 568 569 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 570 571 wiphy->privid = mac80211_wiphy_privid; 572 573 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 574 WIPHY_FLAG_4ADDR_AP | 575 WIPHY_FLAG_4ADDR_STATION | 576 WIPHY_FLAG_REPORTS_OBSS | 577 WIPHY_FLAG_OFFCHAN_TX; 578 579 if (!use_chanctx || ops->remain_on_channel) 580 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 581 582 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 583 NL80211_FEATURE_SAE | 584 NL80211_FEATURE_HT_IBSS | 585 NL80211_FEATURE_VIF_TXPOWER | 586 NL80211_FEATURE_MAC_ON_CREATE | 587 NL80211_FEATURE_USERSPACE_MPM | 588 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 589 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 590 wiphy_ext_feature_set(wiphy, 591 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 592 wiphy_ext_feature_set(wiphy, 593 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 594 595 if (!ops->hw_scan) { 596 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 597 NL80211_FEATURE_AP_SCAN; 598 /* 599 * if the driver behaves correctly using the probe request 600 * (template) from mac80211, then both of these should be 601 * supported even with hw scan - but let drivers opt in. 602 */ 603 wiphy_ext_feature_set(wiphy, 604 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 605 wiphy_ext_feature_set(wiphy, 606 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 607 } 608 609 if (!ops->set_key) 610 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 611 612 if (ops->wake_tx_queue) 613 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 614 615 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 616 617 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 618 619 local = wiphy_priv(wiphy); 620 621 if (sta_info_init(local)) 622 goto err_free; 623 624 local->hw.wiphy = wiphy; 625 626 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 627 628 local->ops = ops; 629 local->use_chanctx = use_chanctx; 630 631 /* 632 * We need a bit of data queued to build aggregates properly, so 633 * instruct the TCP stack to allow more than a single ms of data 634 * to be queued in the stack. The value is a bit-shift of 1 635 * second, so 7 is ~8ms of queued data. Only affects local TCP 636 * sockets. 637 * This is the default, anyhow - drivers may need to override it 638 * for local reasons (longer buffers, longer completion time, or 639 * similar). 640 */ 641 local->hw.tx_sk_pacing_shift = 7; 642 643 /* set up some defaults */ 644 local->hw.queues = 1; 645 local->hw.max_rates = 1; 646 local->hw.max_report_rates = 0; 647 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 648 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 649 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 650 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 651 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 652 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 653 IEEE80211_RADIOTAP_MCS_HAVE_GI | 654 IEEE80211_RADIOTAP_MCS_HAVE_BW; 655 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 656 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 657 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 658 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 659 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 660 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 661 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 662 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 663 664 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 665 666 wiphy->extended_capabilities = local->ext_capa; 667 wiphy->extended_capabilities_mask = local->ext_capa; 668 wiphy->extended_capabilities_len = 669 ARRAY_SIZE(local->ext_capa); 670 671 INIT_LIST_HEAD(&local->interfaces); 672 INIT_LIST_HEAD(&local->mon_list); 673 674 __hw_addr_init(&local->mc_list); 675 676 mutex_init(&local->iflist_mtx); 677 mutex_init(&local->mtx); 678 679 mutex_init(&local->key_mtx); 680 spin_lock_init(&local->filter_lock); 681 spin_lock_init(&local->rx_path_lock); 682 spin_lock_init(&local->queue_stop_reason_lock); 683 684 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 685 INIT_LIST_HEAD(&local->active_txqs[i]); 686 spin_lock_init(&local->active_txq_lock[i]); 687 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 688 local->aql_txq_limit_high[i] = 689 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 690 } 691 692 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 693 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 694 atomic_set(&local->aql_total_pending_airtime, 0); 695 696 INIT_LIST_HEAD(&local->chanctx_list); 697 mutex_init(&local->chanctx_mtx); 698 699 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 700 701 INIT_WORK(&local->restart_work, ieee80211_restart_work); 702 703 INIT_WORK(&local->radar_detected_work, 704 ieee80211_dfs_radar_detected_work); 705 706 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 707 local->smps_mode = IEEE80211_SMPS_OFF; 708 709 INIT_WORK(&local->dynamic_ps_enable_work, 710 ieee80211_dynamic_ps_enable_work); 711 INIT_WORK(&local->dynamic_ps_disable_work, 712 ieee80211_dynamic_ps_disable_work); 713 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 714 715 INIT_WORK(&local->sched_scan_stopped_work, 716 ieee80211_sched_scan_stopped_work); 717 718 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 719 720 spin_lock_init(&local->ack_status_lock); 721 idr_init(&local->ack_status_frames); 722 723 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 724 skb_queue_head_init(&local->pending[i]); 725 atomic_set(&local->agg_queue_stop[i], 0); 726 } 727 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 728 (unsigned long)local); 729 730 if (ops->wake_tx_queue) 731 tasklet_init(&local->wake_txqs_tasklet, ieee80211_wake_txqs, 732 (unsigned long)local); 733 734 tasklet_init(&local->tasklet, 735 ieee80211_tasklet_handler, 736 (unsigned long) local); 737 738 skb_queue_head_init(&local->skb_queue); 739 skb_queue_head_init(&local->skb_queue_unreliable); 740 skb_queue_head_init(&local->skb_queue_tdls_chsw); 741 742 ieee80211_alloc_led_names(local); 743 744 ieee80211_roc_setup(local); 745 746 local->hw.radiotap_timestamp.units_pos = -1; 747 local->hw.radiotap_timestamp.accuracy = -1; 748 749 return &local->hw; 750 err_free: 751 wiphy_free(wiphy); 752 return NULL; 753 } 754 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 755 756 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 757 { 758 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 759 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 760 int n_suites = 0, r = 0, w = 0; 761 u32 *suites; 762 static const u32 cipher_suites[] = { 763 /* keep WEP first, it may be removed below */ 764 WLAN_CIPHER_SUITE_WEP40, 765 WLAN_CIPHER_SUITE_WEP104, 766 WLAN_CIPHER_SUITE_TKIP, 767 WLAN_CIPHER_SUITE_CCMP, 768 WLAN_CIPHER_SUITE_CCMP_256, 769 WLAN_CIPHER_SUITE_GCMP, 770 WLAN_CIPHER_SUITE_GCMP_256, 771 772 /* keep last -- depends on hw flags! */ 773 WLAN_CIPHER_SUITE_AES_CMAC, 774 WLAN_CIPHER_SUITE_BIP_CMAC_256, 775 WLAN_CIPHER_SUITE_BIP_GMAC_128, 776 WLAN_CIPHER_SUITE_BIP_GMAC_256, 777 }; 778 779 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 780 local->hw.wiphy->cipher_suites) { 781 /* If the driver advertises, or doesn't support SW crypto, 782 * we only need to remove WEP if necessary. 783 */ 784 if (have_wep) 785 return 0; 786 787 /* well if it has _no_ ciphers ... fine */ 788 if (!local->hw.wiphy->n_cipher_suites) 789 return 0; 790 791 /* Driver provides cipher suites, but we need to exclude WEP */ 792 suites = kmemdup(local->hw.wiphy->cipher_suites, 793 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 794 GFP_KERNEL); 795 if (!suites) 796 return -ENOMEM; 797 798 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 799 u32 suite = local->hw.wiphy->cipher_suites[r]; 800 801 if (suite == WLAN_CIPHER_SUITE_WEP40 || 802 suite == WLAN_CIPHER_SUITE_WEP104) 803 continue; 804 suites[w++] = suite; 805 } 806 } else if (!local->hw.cipher_schemes) { 807 /* If the driver doesn't have cipher schemes, there's nothing 808 * else to do other than assign the (software supported and 809 * perhaps offloaded) cipher suites. 810 */ 811 local->hw.wiphy->cipher_suites = cipher_suites; 812 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 813 814 if (!have_mfp) 815 local->hw.wiphy->n_cipher_suites -= 4; 816 817 if (!have_wep) { 818 local->hw.wiphy->cipher_suites += 2; 819 local->hw.wiphy->n_cipher_suites -= 2; 820 } 821 822 /* not dynamically allocated, so just return */ 823 return 0; 824 } else { 825 const struct ieee80211_cipher_scheme *cs; 826 827 cs = local->hw.cipher_schemes; 828 829 /* Driver specifies cipher schemes only (but not cipher suites 830 * including the schemes) 831 * 832 * We start counting ciphers defined by schemes, TKIP, CCMP, 833 * CCMP-256, GCMP, and GCMP-256 834 */ 835 n_suites = local->hw.n_cipher_schemes + 5; 836 837 /* check if we have WEP40 and WEP104 */ 838 if (have_wep) 839 n_suites += 2; 840 841 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 842 * BIP-GMAC-256 843 */ 844 if (have_mfp) 845 n_suites += 4; 846 847 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 848 if (!suites) 849 return -ENOMEM; 850 851 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 852 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 853 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 854 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 855 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 856 857 if (have_wep) { 858 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 859 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 860 } 861 862 if (have_mfp) { 863 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 864 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 865 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 866 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 867 } 868 869 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 870 suites[w++] = cs[r].cipher; 871 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 872 kfree(suites); 873 return -EINVAL; 874 } 875 } 876 } 877 878 local->hw.wiphy->cipher_suites = suites; 879 local->hw.wiphy->n_cipher_suites = w; 880 local->wiphy_ciphers_allocated = true; 881 882 return 0; 883 } 884 885 int ieee80211_register_hw(struct ieee80211_hw *hw) 886 { 887 struct ieee80211_local *local = hw_to_local(hw); 888 int result, i; 889 enum nl80211_band band; 890 int channels, max_bitrates; 891 bool supp_ht, supp_vht, supp_he; 892 struct cfg80211_chan_def dflt_chandef = {}; 893 894 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 895 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 896 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 897 return -EINVAL; 898 899 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 900 (!local->ops->tdls_channel_switch || 901 !local->ops->tdls_cancel_channel_switch || 902 !local->ops->tdls_recv_channel_switch)) 903 return -EOPNOTSUPP; 904 905 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 906 !local->ops->set_frag_threshold)) 907 return -EINVAL; 908 909 if (WARN_ON(local->hw.wiphy->interface_modes & 910 BIT(NL80211_IFTYPE_NAN) && 911 (!local->ops->start_nan || !local->ops->stop_nan))) 912 return -EINVAL; 913 914 #ifdef CONFIG_PM 915 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 916 return -EINVAL; 917 #endif 918 919 if (!local->use_chanctx) { 920 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 921 const struct ieee80211_iface_combination *comb; 922 923 comb = &local->hw.wiphy->iface_combinations[i]; 924 925 if (comb->num_different_channels > 1) 926 return -EINVAL; 927 } 928 } else { 929 /* 930 * WDS is currently prohibited when channel contexts are used 931 * because there's no clear definition of which channel WDS 932 * type interfaces use 933 */ 934 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 935 return -EINVAL; 936 937 /* DFS is not supported with multi-channel combinations yet */ 938 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 939 const struct ieee80211_iface_combination *comb; 940 941 comb = &local->hw.wiphy->iface_combinations[i]; 942 943 if (comb->radar_detect_widths && 944 comb->num_different_channels > 1) 945 return -EINVAL; 946 } 947 } 948 949 /* Only HW csum features are currently compatible with mac80211 */ 950 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 951 return -EINVAL; 952 953 if (hw->max_report_rates == 0) 954 hw->max_report_rates = hw->max_rates; 955 956 local->rx_chains = 1; 957 958 /* 959 * generic code guarantees at least one band, 960 * set this very early because much code assumes 961 * that hw.conf.channel is assigned 962 */ 963 channels = 0; 964 max_bitrates = 0; 965 supp_ht = false; 966 supp_vht = false; 967 supp_he = false; 968 for (band = 0; band < NUM_NL80211_BANDS; band++) { 969 struct ieee80211_supported_band *sband; 970 971 sband = local->hw.wiphy->bands[band]; 972 if (!sband) 973 continue; 974 975 if (!dflt_chandef.chan) { 976 cfg80211_chandef_create(&dflt_chandef, 977 &sband->channels[0], 978 NL80211_CHAN_NO_HT); 979 /* init channel we're on */ 980 if (!local->use_chanctx && !local->_oper_chandef.chan) { 981 local->hw.conf.chandef = dflt_chandef; 982 local->_oper_chandef = dflt_chandef; 983 } 984 local->monitor_chandef = dflt_chandef; 985 } 986 987 channels += sband->n_channels; 988 989 if (max_bitrates < sband->n_bitrates) 990 max_bitrates = sband->n_bitrates; 991 supp_ht = supp_ht || sband->ht_cap.ht_supported; 992 supp_vht = supp_vht || sband->vht_cap.vht_supported; 993 994 if (!supp_he) 995 supp_he = !!ieee80211_get_he_sta_cap(sband); 996 997 /* HT, VHT, HE require QoS, thus >= 4 queues */ 998 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 999 (supp_ht || supp_vht || supp_he))) 1000 return -EINVAL; 1001 1002 if (!sband->ht_cap.ht_supported) 1003 continue; 1004 1005 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1006 local->rx_chains = 1007 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1008 local->rx_chains); 1009 1010 /* no need to mask, SM_PS_DISABLED has all bits set */ 1011 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1012 IEEE80211_HT_CAP_SM_PS_SHIFT; 1013 } 1014 1015 /* if low-level driver supports AP, we also support VLAN. 1016 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1017 * based on their support to transmit SW encrypted packets. 1018 */ 1019 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1020 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1021 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1022 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1023 } 1024 1025 /* mac80211 always supports monitor */ 1026 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1027 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1028 1029 /* mac80211 doesn't support more than one IBSS interface right now */ 1030 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1031 const struct ieee80211_iface_combination *c; 1032 int j; 1033 1034 c = &hw->wiphy->iface_combinations[i]; 1035 1036 for (j = 0; j < c->n_limits; j++) 1037 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1038 c->limits[j].max > 1) 1039 return -EINVAL; 1040 } 1041 1042 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1043 sizeof(void *) * channels, GFP_KERNEL); 1044 if (!local->int_scan_req) 1045 return -ENOMEM; 1046 1047 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1048 if (!local->hw.wiphy->bands[band]) 1049 continue; 1050 local->int_scan_req->rates[band] = (u32) -1; 1051 } 1052 1053 #ifndef CONFIG_MAC80211_MESH 1054 /* mesh depends on Kconfig, but drivers should set it if they want */ 1055 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1056 #endif 1057 1058 /* if the underlying driver supports mesh, mac80211 will (at least) 1059 * provide routing of mesh authentication frames to userspace */ 1060 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1061 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1062 1063 /* mac80211 supports control port protocol changing */ 1064 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1065 1066 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1067 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1068 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1069 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1070 if (hw->max_signal <= 0) { 1071 result = -EINVAL; 1072 goto fail_workqueue; 1073 } 1074 } 1075 1076 /* Mac80211 and therefore all drivers using SW crypto only 1077 * are able to handle PTK rekeys and Extended Key ID. 1078 */ 1079 if (!local->ops->set_key) { 1080 wiphy_ext_feature_set(local->hw.wiphy, 1081 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1082 wiphy_ext_feature_set(local->hw.wiphy, 1083 NL80211_EXT_FEATURE_EXT_KEY_ID); 1084 } 1085 1086 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1087 wiphy_ext_feature_set(local->hw.wiphy, 1088 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1089 1090 /* 1091 * Calculate scan IE length -- we need this to alloc 1092 * memory and to subtract from the driver limit. It 1093 * includes the DS Params, (extended) supported rates, and HT 1094 * information -- SSID is the driver's responsibility. 1095 */ 1096 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1097 3 /* DS Params */; 1098 if (supp_ht) 1099 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1100 1101 if (supp_vht) 1102 local->scan_ies_len += 1103 2 + sizeof(struct ieee80211_vht_cap); 1104 1105 /* HE cap element is variable in size - set len to allow max size */ 1106 /* 1107 * TODO: 1 is added at the end of the calculation to accommodate for 1108 * the temporary placing of the HE capabilities IE under EXT. 1109 * Remove it once it is placed in the final place. 1110 */ 1111 if (supp_he) 1112 local->scan_ies_len += 1113 2 + sizeof(struct ieee80211_he_cap_elem) + 1114 sizeof(struct ieee80211_he_mcs_nss_supp) + 1115 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1116 1117 if (!local->ops->hw_scan) { 1118 /* For hw_scan, driver needs to set these up. */ 1119 local->hw.wiphy->max_scan_ssids = 4; 1120 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1121 } 1122 1123 /* 1124 * If the driver supports any scan IEs, then assume the 1125 * limit includes the IEs mac80211 will add, otherwise 1126 * leave it at zero and let the driver sort it out; we 1127 * still pass our IEs to the driver but userspace will 1128 * not be allowed to in that case. 1129 */ 1130 if (local->hw.wiphy->max_scan_ie_len) 1131 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1132 1133 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1134 local->hw.n_cipher_schemes)); 1135 1136 result = ieee80211_init_cipher_suites(local); 1137 if (result < 0) 1138 goto fail_workqueue; 1139 1140 if (!local->ops->remain_on_channel) 1141 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1142 1143 /* mac80211 based drivers don't support internal TDLS setup */ 1144 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1145 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1146 1147 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1148 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1149 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1150 1151 /* mac80211 supports multi BSSID, if the driver supports it */ 1152 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1153 local->hw.wiphy->support_mbssid = true; 1154 if (ieee80211_hw_check(&local->hw, 1155 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1156 local->hw.wiphy->support_only_he_mbssid = true; 1157 else 1158 local->ext_capa[2] |= 1159 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1160 } 1161 1162 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 1163 1164 /* 1165 * We use the number of queues for feature tests (QoS, HT) internally 1166 * so restrict them appropriately. 1167 */ 1168 if (hw->queues > IEEE80211_MAX_QUEUES) 1169 hw->queues = IEEE80211_MAX_QUEUES; 1170 1171 local->workqueue = 1172 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1173 if (!local->workqueue) { 1174 result = -ENOMEM; 1175 goto fail_workqueue; 1176 } 1177 1178 /* 1179 * The hardware needs headroom for sending the frame, 1180 * and we need some headroom for passing the frame to monitor 1181 * interfaces, but never both at the same time. 1182 */ 1183 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1184 IEEE80211_TX_STATUS_HEADROOM); 1185 1186 /* 1187 * if the driver doesn't specify a max listen interval we 1188 * use 5 which should be a safe default 1189 */ 1190 if (local->hw.max_listen_interval == 0) 1191 local->hw.max_listen_interval = 5; 1192 1193 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1194 1195 local->dynamic_ps_forced_timeout = -1; 1196 1197 if (!local->hw.max_nan_de_entries) 1198 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1199 1200 if (!local->hw.weight_multiplier) 1201 local->hw.weight_multiplier = 1; 1202 1203 ieee80211_wep_init(local); 1204 1205 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1206 1207 ieee80211_led_init(local); 1208 1209 result = ieee80211_txq_setup_flows(local); 1210 if (result) 1211 goto fail_flows; 1212 1213 rtnl_lock(); 1214 result = ieee80211_init_rate_ctrl_alg(local, 1215 hw->rate_control_algorithm); 1216 rtnl_unlock(); 1217 if (result < 0) { 1218 wiphy_debug(local->hw.wiphy, 1219 "Failed to initialize rate control algorithm\n"); 1220 goto fail_rate; 1221 } 1222 1223 if (local->rate_ctrl) { 1224 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1225 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1226 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1227 } 1228 1229 /* 1230 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1231 * or have it when we don't, copy the sband structure and set/clear it. 1232 * This is necessary because rate scaling algorithms could be switched 1233 * and have different support values. 1234 * Print a message so that in the common case the reallocation can be 1235 * avoided. 1236 */ 1237 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1238 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1239 struct ieee80211_supported_band *sband; 1240 bool local_cap, ie_cap; 1241 1242 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1243 1244 sband = local->hw.wiphy->bands[band]; 1245 if (!sband || !sband->vht_cap.vht_supported) 1246 continue; 1247 1248 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1249 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1250 1251 if (local_cap == ie_cap) 1252 continue; 1253 1254 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1255 if (!sband) { 1256 result = -ENOMEM; 1257 goto fail_rate; 1258 } 1259 1260 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1261 band); 1262 1263 sband->vht_cap.vht_mcs.tx_highest ^= 1264 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1265 1266 local->hw.wiphy->bands[band] = sband; 1267 local->sband_allocated |= BIT(band); 1268 } 1269 1270 result = wiphy_register(local->hw.wiphy); 1271 if (result < 0) 1272 goto fail_wiphy_register; 1273 1274 debugfs_hw_add(local); 1275 rate_control_add_debugfs(local); 1276 1277 rtnl_lock(); 1278 1279 /* add one default STA interface if supported */ 1280 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1281 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1282 struct vif_params params = {0}; 1283 1284 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1285 NL80211_IFTYPE_STATION, ¶ms); 1286 if (result) 1287 wiphy_warn(local->hw.wiphy, 1288 "Failed to add default virtual iface\n"); 1289 } 1290 1291 rtnl_unlock(); 1292 1293 #ifdef CONFIG_INET 1294 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1295 result = register_inetaddr_notifier(&local->ifa_notifier); 1296 if (result) 1297 goto fail_ifa; 1298 #endif 1299 1300 #if IS_ENABLED(CONFIG_IPV6) 1301 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1302 result = register_inet6addr_notifier(&local->ifa6_notifier); 1303 if (result) 1304 goto fail_ifa6; 1305 #endif 1306 1307 return 0; 1308 1309 #if IS_ENABLED(CONFIG_IPV6) 1310 fail_ifa6: 1311 #ifdef CONFIG_INET 1312 unregister_inetaddr_notifier(&local->ifa_notifier); 1313 #endif 1314 #endif 1315 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1316 fail_ifa: 1317 #endif 1318 wiphy_unregister(local->hw.wiphy); 1319 fail_wiphy_register: 1320 rtnl_lock(); 1321 rate_control_deinitialize(local); 1322 ieee80211_remove_interfaces(local); 1323 rtnl_unlock(); 1324 fail_rate: 1325 fail_flows: 1326 ieee80211_led_exit(local); 1327 destroy_workqueue(local->workqueue); 1328 fail_workqueue: 1329 if (local->wiphy_ciphers_allocated) 1330 kfree(local->hw.wiphy->cipher_suites); 1331 kfree(local->int_scan_req); 1332 return result; 1333 } 1334 EXPORT_SYMBOL(ieee80211_register_hw); 1335 1336 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1337 { 1338 struct ieee80211_local *local = hw_to_local(hw); 1339 1340 tasklet_kill(&local->tx_pending_tasklet); 1341 tasklet_kill(&local->tasklet); 1342 1343 #ifdef CONFIG_INET 1344 unregister_inetaddr_notifier(&local->ifa_notifier); 1345 #endif 1346 #if IS_ENABLED(CONFIG_IPV6) 1347 unregister_inet6addr_notifier(&local->ifa6_notifier); 1348 #endif 1349 1350 rtnl_lock(); 1351 1352 /* 1353 * At this point, interface list manipulations are fine 1354 * because the driver cannot be handing us frames any 1355 * more and the tasklet is killed. 1356 */ 1357 ieee80211_remove_interfaces(local); 1358 1359 rtnl_unlock(); 1360 1361 cancel_delayed_work_sync(&local->roc_work); 1362 cancel_work_sync(&local->restart_work); 1363 cancel_work_sync(&local->reconfig_filter); 1364 cancel_work_sync(&local->tdls_chsw_work); 1365 flush_work(&local->sched_scan_stopped_work); 1366 flush_work(&local->radar_detected_work); 1367 1368 ieee80211_clear_tx_pending(local); 1369 rate_control_deinitialize(local); 1370 1371 if (skb_queue_len(&local->skb_queue) || 1372 skb_queue_len(&local->skb_queue_unreliable)) 1373 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1374 skb_queue_purge(&local->skb_queue); 1375 skb_queue_purge(&local->skb_queue_unreliable); 1376 skb_queue_purge(&local->skb_queue_tdls_chsw); 1377 1378 wiphy_unregister(local->hw.wiphy); 1379 destroy_workqueue(local->workqueue); 1380 ieee80211_led_exit(local); 1381 kfree(local->int_scan_req); 1382 } 1383 EXPORT_SYMBOL(ieee80211_unregister_hw); 1384 1385 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1386 { 1387 WARN_ONCE(1, "Have pending ack frames!\n"); 1388 kfree_skb(p); 1389 return 0; 1390 } 1391 1392 void ieee80211_free_hw(struct ieee80211_hw *hw) 1393 { 1394 struct ieee80211_local *local = hw_to_local(hw); 1395 enum nl80211_band band; 1396 1397 mutex_destroy(&local->iflist_mtx); 1398 mutex_destroy(&local->mtx); 1399 1400 if (local->wiphy_ciphers_allocated) 1401 kfree(local->hw.wiphy->cipher_suites); 1402 1403 idr_for_each(&local->ack_status_frames, 1404 ieee80211_free_ack_frame, NULL); 1405 idr_destroy(&local->ack_status_frames); 1406 1407 sta_info_stop(local); 1408 1409 ieee80211_free_led_names(local); 1410 1411 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1412 if (!(local->sband_allocated & BIT(band))) 1413 continue; 1414 kfree(local->hw.wiphy->bands[band]); 1415 } 1416 1417 wiphy_free(local->hw.wiphy); 1418 } 1419 EXPORT_SYMBOL(ieee80211_free_hw); 1420 1421 static int __init ieee80211_init(void) 1422 { 1423 struct sk_buff *skb; 1424 int ret; 1425 1426 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1427 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1428 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1429 1430 ret = rc80211_minstrel_init(); 1431 if (ret) 1432 return ret; 1433 1434 ret = ieee80211_iface_init(); 1435 if (ret) 1436 goto err_netdev; 1437 1438 return 0; 1439 err_netdev: 1440 rc80211_minstrel_exit(); 1441 1442 return ret; 1443 } 1444 1445 static void __exit ieee80211_exit(void) 1446 { 1447 rc80211_minstrel_exit(); 1448 1449 ieee80211s_stop(); 1450 1451 ieee80211_iface_exit(); 1452 1453 rcu_barrier(); 1454 } 1455 1456 1457 subsys_initcall(ieee80211_init); 1458 module_exit(ieee80211_exit); 1459 1460 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1461 MODULE_LICENSE("GPL"); 1462