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) 2018-2021 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 if (local->rx_mcast_action_reg) 68 new_flags |= FIF_MCAST_ACTION; 69 70 spin_lock_bh(&local->filter_lock); 71 changed_flags = local->filter_flags ^ new_flags; 72 73 mc = drv_prepare_multicast(local, &local->mc_list); 74 spin_unlock_bh(&local->filter_lock); 75 76 /* be a bit nasty */ 77 new_flags |= (1<<31); 78 79 drv_configure_filter(local, changed_flags, &new_flags, mc); 80 81 WARN_ON(new_flags & (1<<31)); 82 83 local->filter_flags = new_flags & ~(1<<31); 84 } 85 86 static void ieee80211_reconfig_filter(struct work_struct *work) 87 { 88 struct ieee80211_local *local = 89 container_of(work, struct ieee80211_local, reconfig_filter); 90 91 ieee80211_configure_filter(local); 92 } 93 94 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 95 { 96 struct ieee80211_sub_if_data *sdata; 97 struct cfg80211_chan_def chandef = {}; 98 u32 changed = 0; 99 int power; 100 u32 offchannel_flag; 101 102 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 103 104 if (local->scan_chandef.chan) { 105 chandef = local->scan_chandef; 106 } else if (local->tmp_channel) { 107 chandef.chan = local->tmp_channel; 108 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 109 chandef.center_freq1 = chandef.chan->center_freq; 110 chandef.freq1_offset = chandef.chan->freq_offset; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 116 chandef.chan->center_freq, chandef.chan->freq_offset, 117 chandef.width, chandef.center_freq1, chandef.freq1_offset, 118 chandef.center_freq2); 119 120 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 121 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 122 else 123 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 124 125 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 126 127 if (offchannel_flag || 128 !cfg80211_chandef_identical(&local->hw.conf.chandef, 129 &local->_oper_chandef)) { 130 local->hw.conf.chandef = chandef; 131 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 132 } 133 134 if (!conf_is_ht(&local->hw.conf)) { 135 /* 136 * mac80211.h documents that this is only valid 137 * when the channel is set to an HT type, and 138 * that otherwise STATIC is used. 139 */ 140 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 141 } else if (local->hw.conf.smps_mode != local->smps_mode) { 142 local->hw.conf.smps_mode = local->smps_mode; 143 changed |= IEEE80211_CONF_CHANGE_SMPS; 144 } 145 146 power = ieee80211_chandef_max_power(&chandef); 147 148 rcu_read_lock(); 149 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 150 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 151 continue; 152 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 153 continue; 154 if (sdata->vif.bss_conf.txpower == INT_MIN) 155 continue; 156 power = min(power, sdata->vif.bss_conf.txpower); 157 } 158 rcu_read_unlock(); 159 160 if (local->hw.conf.power_level != power) { 161 changed |= IEEE80211_CONF_CHANGE_POWER; 162 local->hw.conf.power_level = power; 163 } 164 165 return changed; 166 } 167 168 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 169 { 170 int ret = 0; 171 172 might_sleep(); 173 174 if (!local->use_chanctx) 175 changed |= ieee80211_hw_conf_chan(local); 176 else 177 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 178 IEEE80211_CONF_CHANGE_POWER); 179 180 if (changed && local->open_count) { 181 ret = drv_config(local, changed); 182 /* 183 * Goal: 184 * HW reconfiguration should never fail, the driver has told 185 * us what it can support so it should live up to that promise. 186 * 187 * Current status: 188 * rfkill is not integrated with mac80211 and a 189 * configuration command can thus fail if hardware rfkill 190 * is enabled 191 * 192 * FIXME: integrate rfkill with mac80211 and then add this 193 * WARN_ON() back 194 * 195 */ 196 /* WARN_ON(ret); */ 197 } 198 199 return ret; 200 } 201 202 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 203 u32 changed) 204 { 205 struct ieee80211_local *local = sdata->local; 206 207 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 208 return; 209 210 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 211 } 212 213 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 214 { 215 sdata->vif.bss_conf.use_cts_prot = false; 216 sdata->vif.bss_conf.use_short_preamble = false; 217 sdata->vif.bss_conf.use_short_slot = false; 218 return BSS_CHANGED_ERP_CTS_PROT | 219 BSS_CHANGED_ERP_PREAMBLE | 220 BSS_CHANGED_ERP_SLOT; 221 } 222 223 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 224 { 225 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 226 struct sk_buff *skb; 227 228 while ((skb = skb_dequeue(&local->skb_queue)) || 229 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 230 switch (skb->pkt_type) { 231 case IEEE80211_RX_MSG: 232 /* Clear skb->pkt_type in order to not confuse kernel 233 * netstack. */ 234 skb->pkt_type = 0; 235 ieee80211_rx(&local->hw, skb); 236 break; 237 case IEEE80211_TX_STATUS_MSG: 238 skb->pkt_type = 0; 239 ieee80211_tx_status(&local->hw, skb); 240 break; 241 default: 242 WARN(1, "mac80211: Packet is of unknown type %d\n", 243 skb->pkt_type); 244 dev_kfree_skb(skb); 245 break; 246 } 247 } 248 } 249 250 static void ieee80211_restart_work(struct work_struct *work) 251 { 252 struct ieee80211_local *local = 253 container_of(work, struct ieee80211_local, restart_work); 254 struct ieee80211_sub_if_data *sdata; 255 int ret; 256 257 /* wait for scan work complete */ 258 flush_workqueue(local->workqueue); 259 flush_work(&local->sched_scan_stopped_work); 260 261 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 262 "%s called with hardware scan in progress\n", __func__); 263 264 flush_work(&local->radar_detected_work); 265 /* we might do interface manipulations, so need both */ 266 rtnl_lock(); 267 wiphy_lock(local->hw.wiphy); 268 list_for_each_entry(sdata, &local->interfaces, list) { 269 /* 270 * XXX: there may be more work for other vif types and even 271 * for station mode: a good thing would be to run most of 272 * the iface type's dependent _stop (ieee80211_mg_stop, 273 * ieee80211_ibss_stop) etc... 274 * For now, fix only the specific bug that was seen: race 275 * between csa_connection_drop_work and us. 276 */ 277 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 278 /* 279 * This worker is scheduled from the iface worker that 280 * runs on mac80211's workqueue, so we can't be 281 * scheduling this worker after the cancel right here. 282 * The exception is ieee80211_chswitch_done. 283 * Then we can have a race... 284 */ 285 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 286 if (sdata->vif.csa_active) { 287 sdata_lock(sdata); 288 ieee80211_sta_connection_lost(sdata, 289 sdata->u.mgd.associated->bssid, 290 WLAN_REASON_UNSPECIFIED, false); 291 sdata_unlock(sdata); 292 } 293 } 294 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 295 } 296 ieee80211_scan_cancel(local); 297 298 /* make sure any new ROC will consider local->in_reconfig */ 299 flush_delayed_work(&local->roc_work); 300 flush_work(&local->hw_roc_done); 301 302 /* wait for all packet processing to be done */ 303 synchronize_net(); 304 305 ret = ieee80211_reconfig(local); 306 wiphy_unlock(local->hw.wiphy); 307 308 if (ret) 309 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 310 311 rtnl_unlock(); 312 } 313 314 void ieee80211_restart_hw(struct ieee80211_hw *hw) 315 { 316 struct ieee80211_local *local = hw_to_local(hw); 317 318 trace_api_restart_hw(local); 319 320 wiphy_info(hw->wiphy, 321 "Hardware restart was requested\n"); 322 323 /* use this reason, ieee80211_reconfig will unblock it */ 324 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 325 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 326 false); 327 328 /* 329 * Stop all Rx during the reconfig. We don't want state changes 330 * or driver callbacks while this is in progress. 331 */ 332 local->in_reconfig = true; 333 barrier(); 334 335 queue_work(system_freezable_wq, &local->restart_work); 336 } 337 EXPORT_SYMBOL(ieee80211_restart_hw); 338 339 #ifdef CONFIG_INET 340 static int ieee80211_ifa_changed(struct notifier_block *nb, 341 unsigned long data, void *arg) 342 { 343 struct in_ifaddr *ifa = arg; 344 struct ieee80211_local *local = 345 container_of(nb, struct ieee80211_local, 346 ifa_notifier); 347 struct net_device *ndev = ifa->ifa_dev->dev; 348 struct wireless_dev *wdev = ndev->ieee80211_ptr; 349 struct in_device *idev; 350 struct ieee80211_sub_if_data *sdata; 351 struct ieee80211_bss_conf *bss_conf; 352 struct ieee80211_if_managed *ifmgd; 353 int c = 0; 354 355 /* Make sure it's our interface that got changed */ 356 if (!wdev) 357 return NOTIFY_DONE; 358 359 if (wdev->wiphy != local->hw.wiphy) 360 return NOTIFY_DONE; 361 362 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 363 bss_conf = &sdata->vif.bss_conf; 364 365 /* ARP filtering is only supported in managed mode */ 366 if (sdata->vif.type != NL80211_IFTYPE_STATION) 367 return NOTIFY_DONE; 368 369 idev = __in_dev_get_rtnl(sdata->dev); 370 if (!idev) 371 return NOTIFY_DONE; 372 373 ifmgd = &sdata->u.mgd; 374 sdata_lock(sdata); 375 376 /* Copy the addresses to the bss_conf list */ 377 ifa = rtnl_dereference(idev->ifa_list); 378 while (ifa) { 379 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 380 bss_conf->arp_addr_list[c] = ifa->ifa_address; 381 ifa = rtnl_dereference(ifa->ifa_next); 382 c++; 383 } 384 385 bss_conf->arp_addr_cnt = c; 386 387 /* Configure driver only if associated (which also implies it is up) */ 388 if (ifmgd->associated) 389 ieee80211_bss_info_change_notify(sdata, 390 BSS_CHANGED_ARP_FILTER); 391 392 sdata_unlock(sdata); 393 394 return NOTIFY_OK; 395 } 396 #endif 397 398 #if IS_ENABLED(CONFIG_IPV6) 399 static int ieee80211_ifa6_changed(struct notifier_block *nb, 400 unsigned long data, void *arg) 401 { 402 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 403 struct inet6_dev *idev = ifa->idev; 404 struct net_device *ndev = ifa->idev->dev; 405 struct ieee80211_local *local = 406 container_of(nb, struct ieee80211_local, ifa6_notifier); 407 struct wireless_dev *wdev = ndev->ieee80211_ptr; 408 struct ieee80211_sub_if_data *sdata; 409 410 /* Make sure it's our interface that got changed */ 411 if (!wdev || wdev->wiphy != local->hw.wiphy) 412 return NOTIFY_DONE; 413 414 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 415 416 /* 417 * For now only support station mode. This is mostly because 418 * doing AP would have to handle AP_VLAN in some way ... 419 */ 420 if (sdata->vif.type != NL80211_IFTYPE_STATION) 421 return NOTIFY_DONE; 422 423 drv_ipv6_addr_change(local, sdata, idev); 424 425 return NOTIFY_OK; 426 } 427 #endif 428 429 /* There isn't a lot of sense in it, but you can transmit anything you like */ 430 static const struct ieee80211_txrx_stypes 431 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 432 [NL80211_IFTYPE_ADHOC] = { 433 .tx = 0xffff, 434 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 435 BIT(IEEE80211_STYPE_AUTH >> 4) | 436 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 437 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 438 }, 439 [NL80211_IFTYPE_STATION] = { 440 .tx = 0xffff, 441 /* 442 * To support Pre Association Security Negotiation (PASN) while 443 * already associated to one AP, allow user space to register to 444 * Rx authentication frames, so that the user space logic would 445 * be able to receive/handle authentication frames from a 446 * different AP as part of PASN. 447 * It is expected that user space would intelligently register 448 * for Rx authentication frames, i.e., only when PASN is used 449 * and configure a match filter only for PASN authentication 450 * algorithm, as otherwise the MLME functionality of mac80211 451 * would be broken. 452 */ 453 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 454 BIT(IEEE80211_STYPE_AUTH >> 4) | 455 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 456 }, 457 [NL80211_IFTYPE_AP] = { 458 .tx = 0xffff, 459 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 460 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 461 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 462 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 463 BIT(IEEE80211_STYPE_AUTH >> 4) | 464 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 465 BIT(IEEE80211_STYPE_ACTION >> 4), 466 }, 467 [NL80211_IFTYPE_AP_VLAN] = { 468 /* copy AP */ 469 .tx = 0xffff, 470 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 471 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 472 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 473 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 474 BIT(IEEE80211_STYPE_AUTH >> 4) | 475 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 476 BIT(IEEE80211_STYPE_ACTION >> 4), 477 }, 478 [NL80211_IFTYPE_P2P_CLIENT] = { 479 .tx = 0xffff, 480 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 481 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 482 }, 483 [NL80211_IFTYPE_P2P_GO] = { 484 .tx = 0xffff, 485 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 486 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 487 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 488 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 489 BIT(IEEE80211_STYPE_AUTH >> 4) | 490 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 491 BIT(IEEE80211_STYPE_ACTION >> 4), 492 }, 493 [NL80211_IFTYPE_MESH_POINT] = { 494 .tx = 0xffff, 495 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 496 BIT(IEEE80211_STYPE_AUTH >> 4) | 497 BIT(IEEE80211_STYPE_DEAUTH >> 4), 498 }, 499 [NL80211_IFTYPE_P2P_DEVICE] = { 500 .tx = 0xffff, 501 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 502 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 503 }, 504 }; 505 506 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 507 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 508 IEEE80211_HT_AMPDU_PARM_DENSITY, 509 510 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 511 IEEE80211_HT_CAP_MAX_AMSDU | 512 IEEE80211_HT_CAP_SGI_20 | 513 IEEE80211_HT_CAP_SGI_40 | 514 IEEE80211_HT_CAP_TX_STBC | 515 IEEE80211_HT_CAP_RX_STBC | 516 IEEE80211_HT_CAP_LDPC_CODING | 517 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 518 .mcs = { 519 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 520 0xff, 0xff, 0xff, 0xff, 0xff, }, 521 }, 522 }; 523 524 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 525 .vht_cap_info = 526 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 527 IEEE80211_VHT_CAP_SHORT_GI_80 | 528 IEEE80211_VHT_CAP_SHORT_GI_160 | 529 IEEE80211_VHT_CAP_RXSTBC_MASK | 530 IEEE80211_VHT_CAP_TXSTBC | 531 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 532 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 533 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 534 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 535 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 536 .supp_mcs = { 537 .rx_mcs_map = cpu_to_le16(~0), 538 .tx_mcs_map = cpu_to_le16(~0), 539 }, 540 }; 541 542 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 543 const struct ieee80211_ops *ops, 544 const char *requested_name) 545 { 546 struct ieee80211_local *local; 547 int priv_size, i; 548 struct wiphy *wiphy; 549 bool use_chanctx; 550 551 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 552 !ops->add_interface || !ops->remove_interface || 553 !ops->configure_filter)) 554 return NULL; 555 556 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 557 return NULL; 558 559 /* check all or no channel context operations exist */ 560 i = !!ops->add_chanctx + !!ops->remove_chanctx + 561 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 562 !!ops->unassign_vif_chanctx; 563 if (WARN_ON(i != 0 && i != 5)) 564 return NULL; 565 use_chanctx = i == 5; 566 567 /* Ensure 32-byte alignment of our private data and hw private data. 568 * We use the wiphy priv data for both our ieee80211_local and for 569 * the driver's private data 570 * 571 * In memory it'll be like this: 572 * 573 * +-------------------------+ 574 * | struct wiphy | 575 * +-------------------------+ 576 * | struct ieee80211_local | 577 * +-------------------------+ 578 * | driver's private data | 579 * +-------------------------+ 580 * 581 */ 582 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 583 584 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 585 586 if (!wiphy) 587 return NULL; 588 589 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 590 591 wiphy->privid = mac80211_wiphy_privid; 592 593 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 594 WIPHY_FLAG_4ADDR_AP | 595 WIPHY_FLAG_4ADDR_STATION | 596 WIPHY_FLAG_REPORTS_OBSS | 597 WIPHY_FLAG_OFFCHAN_TX; 598 599 if (!use_chanctx || ops->remain_on_channel) 600 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 601 602 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 603 NL80211_FEATURE_SAE | 604 NL80211_FEATURE_HT_IBSS | 605 NL80211_FEATURE_VIF_TXPOWER | 606 NL80211_FEATURE_MAC_ON_CREATE | 607 NL80211_FEATURE_USERSPACE_MPM | 608 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 609 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 610 wiphy_ext_feature_set(wiphy, 611 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 612 wiphy_ext_feature_set(wiphy, 613 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 614 wiphy_ext_feature_set(wiphy, 615 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 616 wiphy_ext_feature_set(wiphy, 617 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 618 619 if (!ops->hw_scan) { 620 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 621 NL80211_FEATURE_AP_SCAN; 622 /* 623 * if the driver behaves correctly using the probe request 624 * (template) from mac80211, then both of these should be 625 * supported even with hw scan - but let drivers opt in. 626 */ 627 wiphy_ext_feature_set(wiphy, 628 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 629 wiphy_ext_feature_set(wiphy, 630 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 631 } 632 633 if (!ops->set_key) 634 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 635 636 if (ops->wake_tx_queue) 637 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 638 639 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 640 641 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 642 643 local = wiphy_priv(wiphy); 644 645 if (sta_info_init(local)) 646 goto err_free; 647 648 local->hw.wiphy = wiphy; 649 650 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 651 652 local->ops = ops; 653 local->use_chanctx = use_chanctx; 654 655 /* 656 * We need a bit of data queued to build aggregates properly, so 657 * instruct the TCP stack to allow more than a single ms of data 658 * to be queued in the stack. The value is a bit-shift of 1 659 * second, so 7 is ~8ms of queued data. Only affects local TCP 660 * sockets. 661 * This is the default, anyhow - drivers may need to override it 662 * for local reasons (longer buffers, longer completion time, or 663 * similar). 664 */ 665 local->hw.tx_sk_pacing_shift = 7; 666 667 /* set up some defaults */ 668 local->hw.queues = 1; 669 local->hw.max_rates = 1; 670 local->hw.max_report_rates = 0; 671 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 672 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 673 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 674 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 675 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 676 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 677 IEEE80211_RADIOTAP_MCS_HAVE_GI | 678 IEEE80211_RADIOTAP_MCS_HAVE_BW; 679 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 680 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 681 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 682 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 683 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 684 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 685 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 686 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 687 688 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 689 690 wiphy->extended_capabilities = local->ext_capa; 691 wiphy->extended_capabilities_mask = local->ext_capa; 692 wiphy->extended_capabilities_len = 693 ARRAY_SIZE(local->ext_capa); 694 695 INIT_LIST_HEAD(&local->interfaces); 696 INIT_LIST_HEAD(&local->mon_list); 697 698 __hw_addr_init(&local->mc_list); 699 700 mutex_init(&local->iflist_mtx); 701 mutex_init(&local->mtx); 702 703 mutex_init(&local->key_mtx); 704 spin_lock_init(&local->filter_lock); 705 spin_lock_init(&local->rx_path_lock); 706 spin_lock_init(&local->queue_stop_reason_lock); 707 708 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 709 INIT_LIST_HEAD(&local->active_txqs[i]); 710 spin_lock_init(&local->active_txq_lock[i]); 711 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 712 local->aql_txq_limit_high[i] = 713 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 714 } 715 716 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 717 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 718 atomic_set(&local->aql_total_pending_airtime, 0); 719 720 INIT_LIST_HEAD(&local->chanctx_list); 721 mutex_init(&local->chanctx_mtx); 722 723 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 724 725 INIT_WORK(&local->restart_work, ieee80211_restart_work); 726 727 INIT_WORK(&local->radar_detected_work, 728 ieee80211_dfs_radar_detected_work); 729 730 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 731 local->smps_mode = IEEE80211_SMPS_OFF; 732 733 INIT_WORK(&local->dynamic_ps_enable_work, 734 ieee80211_dynamic_ps_enable_work); 735 INIT_WORK(&local->dynamic_ps_disable_work, 736 ieee80211_dynamic_ps_disable_work); 737 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 738 739 INIT_WORK(&local->sched_scan_stopped_work, 740 ieee80211_sched_scan_stopped_work); 741 742 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 743 744 spin_lock_init(&local->ack_status_lock); 745 idr_init(&local->ack_status_frames); 746 747 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 748 skb_queue_head_init(&local->pending[i]); 749 atomic_set(&local->agg_queue_stop[i], 0); 750 } 751 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 752 753 if (ops->wake_tx_queue) 754 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 755 756 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 757 758 skb_queue_head_init(&local->skb_queue); 759 skb_queue_head_init(&local->skb_queue_unreliable); 760 skb_queue_head_init(&local->skb_queue_tdls_chsw); 761 762 ieee80211_alloc_led_names(local); 763 764 ieee80211_roc_setup(local); 765 766 local->hw.radiotap_timestamp.units_pos = -1; 767 local->hw.radiotap_timestamp.accuracy = -1; 768 769 return &local->hw; 770 err_free: 771 wiphy_free(wiphy); 772 return NULL; 773 } 774 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 775 776 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 777 { 778 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 779 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 780 int n_suites = 0, r = 0, w = 0; 781 u32 *suites; 782 static const u32 cipher_suites[] = { 783 /* keep WEP first, it may be removed below */ 784 WLAN_CIPHER_SUITE_WEP40, 785 WLAN_CIPHER_SUITE_WEP104, 786 WLAN_CIPHER_SUITE_TKIP, 787 WLAN_CIPHER_SUITE_CCMP, 788 WLAN_CIPHER_SUITE_CCMP_256, 789 WLAN_CIPHER_SUITE_GCMP, 790 WLAN_CIPHER_SUITE_GCMP_256, 791 792 /* keep last -- depends on hw flags! */ 793 WLAN_CIPHER_SUITE_AES_CMAC, 794 WLAN_CIPHER_SUITE_BIP_CMAC_256, 795 WLAN_CIPHER_SUITE_BIP_GMAC_128, 796 WLAN_CIPHER_SUITE_BIP_GMAC_256, 797 }; 798 799 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 800 local->hw.wiphy->cipher_suites) { 801 /* If the driver advertises, or doesn't support SW crypto, 802 * we only need to remove WEP if necessary. 803 */ 804 if (have_wep) 805 return 0; 806 807 /* well if it has _no_ ciphers ... fine */ 808 if (!local->hw.wiphy->n_cipher_suites) 809 return 0; 810 811 /* Driver provides cipher suites, but we need to exclude WEP */ 812 suites = kmemdup(local->hw.wiphy->cipher_suites, 813 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 814 GFP_KERNEL); 815 if (!suites) 816 return -ENOMEM; 817 818 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 819 u32 suite = local->hw.wiphy->cipher_suites[r]; 820 821 if (suite == WLAN_CIPHER_SUITE_WEP40 || 822 suite == WLAN_CIPHER_SUITE_WEP104) 823 continue; 824 suites[w++] = suite; 825 } 826 } else if (!local->hw.cipher_schemes) { 827 /* If the driver doesn't have cipher schemes, there's nothing 828 * else to do other than assign the (software supported and 829 * perhaps offloaded) cipher suites. 830 */ 831 local->hw.wiphy->cipher_suites = cipher_suites; 832 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 833 834 if (!have_mfp) 835 local->hw.wiphy->n_cipher_suites -= 4; 836 837 if (!have_wep) { 838 local->hw.wiphy->cipher_suites += 2; 839 local->hw.wiphy->n_cipher_suites -= 2; 840 } 841 842 /* not dynamically allocated, so just return */ 843 return 0; 844 } else { 845 const struct ieee80211_cipher_scheme *cs; 846 847 cs = local->hw.cipher_schemes; 848 849 /* Driver specifies cipher schemes only (but not cipher suites 850 * including the schemes) 851 * 852 * We start counting ciphers defined by schemes, TKIP, CCMP, 853 * CCMP-256, GCMP, and GCMP-256 854 */ 855 n_suites = local->hw.n_cipher_schemes + 5; 856 857 /* check if we have WEP40 and WEP104 */ 858 if (have_wep) 859 n_suites += 2; 860 861 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 862 * BIP-GMAC-256 863 */ 864 if (have_mfp) 865 n_suites += 4; 866 867 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 868 if (!suites) 869 return -ENOMEM; 870 871 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 872 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 873 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 874 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 875 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 876 877 if (have_wep) { 878 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 879 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 880 } 881 882 if (have_mfp) { 883 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 884 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 885 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 886 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 887 } 888 889 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 890 suites[w++] = cs[r].cipher; 891 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 892 kfree(suites); 893 return -EINVAL; 894 } 895 } 896 } 897 898 local->hw.wiphy->cipher_suites = suites; 899 local->hw.wiphy->n_cipher_suites = w; 900 local->wiphy_ciphers_allocated = true; 901 902 return 0; 903 } 904 905 int ieee80211_register_hw(struct ieee80211_hw *hw) 906 { 907 struct ieee80211_local *local = hw_to_local(hw); 908 int result, i; 909 enum nl80211_band band; 910 int channels, max_bitrates; 911 bool supp_ht, supp_vht, supp_he; 912 struct cfg80211_chan_def dflt_chandef = {}; 913 914 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 915 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 916 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 917 return -EINVAL; 918 919 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 920 (!local->ops->tdls_channel_switch || 921 !local->ops->tdls_cancel_channel_switch || 922 !local->ops->tdls_recv_channel_switch)) 923 return -EOPNOTSUPP; 924 925 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 926 !local->ops->set_frag_threshold)) 927 return -EINVAL; 928 929 if (WARN_ON(local->hw.wiphy->interface_modes & 930 BIT(NL80211_IFTYPE_NAN) && 931 (!local->ops->start_nan || !local->ops->stop_nan))) 932 return -EINVAL; 933 934 #ifdef CONFIG_PM 935 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 936 return -EINVAL; 937 #endif 938 939 if (!local->use_chanctx) { 940 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 941 const struct ieee80211_iface_combination *comb; 942 943 comb = &local->hw.wiphy->iface_combinations[i]; 944 945 if (comb->num_different_channels > 1) 946 return -EINVAL; 947 } 948 } else { 949 /* DFS is not supported with multi-channel combinations yet */ 950 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 951 const struct ieee80211_iface_combination *comb; 952 953 comb = &local->hw.wiphy->iface_combinations[i]; 954 955 if (comb->radar_detect_widths && 956 comb->num_different_channels > 1) 957 return -EINVAL; 958 } 959 } 960 961 /* Only HW csum features are currently compatible with mac80211 */ 962 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 963 return -EINVAL; 964 965 if (hw->max_report_rates == 0) 966 hw->max_report_rates = hw->max_rates; 967 968 local->rx_chains = 1; 969 970 /* 971 * generic code guarantees at least one band, 972 * set this very early because much code assumes 973 * that hw.conf.channel is assigned 974 */ 975 channels = 0; 976 max_bitrates = 0; 977 supp_ht = false; 978 supp_vht = false; 979 supp_he = false; 980 for (band = 0; band < NUM_NL80211_BANDS; band++) { 981 struct ieee80211_supported_band *sband; 982 983 sband = local->hw.wiphy->bands[band]; 984 if (!sband) 985 continue; 986 987 if (!dflt_chandef.chan) { 988 /* 989 * Assign the first enabled channel to dflt_chandef 990 * from the list of channels 991 */ 992 for (i = 0; i < sband->n_channels; i++) 993 if (!(sband->channels[i].flags & 994 IEEE80211_CHAN_DISABLED)) 995 break; 996 /* if none found then use the first anyway */ 997 if (i == sband->n_channels) 998 i = 0; 999 cfg80211_chandef_create(&dflt_chandef, 1000 &sband->channels[i], 1001 NL80211_CHAN_NO_HT); 1002 /* init channel we're on */ 1003 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1004 local->hw.conf.chandef = dflt_chandef; 1005 local->_oper_chandef = dflt_chandef; 1006 } 1007 local->monitor_chandef = dflt_chandef; 1008 } 1009 1010 channels += sband->n_channels; 1011 1012 if (max_bitrates < sband->n_bitrates) 1013 max_bitrates = sband->n_bitrates; 1014 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1015 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1016 1017 if (!supp_he) 1018 supp_he = !!ieee80211_get_he_sta_cap(sband); 1019 1020 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1021 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1022 (supp_ht || supp_vht || supp_he))) 1023 return -EINVAL; 1024 1025 if (!sband->ht_cap.ht_supported) 1026 continue; 1027 1028 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1029 local->rx_chains = 1030 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1031 local->rx_chains); 1032 1033 /* no need to mask, SM_PS_DISABLED has all bits set */ 1034 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1035 IEEE80211_HT_CAP_SM_PS_SHIFT; 1036 } 1037 1038 /* if low-level driver supports AP, we also support VLAN. 1039 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1040 * based on their support to transmit SW encrypted packets. 1041 */ 1042 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1043 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1044 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1045 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1046 } 1047 1048 /* mac80211 always supports monitor */ 1049 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1050 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1051 1052 /* mac80211 doesn't support more than one IBSS interface right now */ 1053 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1054 const struct ieee80211_iface_combination *c; 1055 int j; 1056 1057 c = &hw->wiphy->iface_combinations[i]; 1058 1059 for (j = 0; j < c->n_limits; j++) 1060 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1061 c->limits[j].max > 1) 1062 return -EINVAL; 1063 } 1064 1065 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1066 sizeof(void *) * channels, GFP_KERNEL); 1067 if (!local->int_scan_req) 1068 return -ENOMEM; 1069 1070 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1071 if (!local->hw.wiphy->bands[band]) 1072 continue; 1073 local->int_scan_req->rates[band] = (u32) -1; 1074 } 1075 1076 #ifndef CONFIG_MAC80211_MESH 1077 /* mesh depends on Kconfig, but drivers should set it if they want */ 1078 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1079 #endif 1080 1081 /* if the underlying driver supports mesh, mac80211 will (at least) 1082 * provide routing of mesh authentication frames to userspace */ 1083 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1084 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1085 1086 /* mac80211 supports control port protocol changing */ 1087 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1088 1089 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1090 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1091 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1092 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1093 if (hw->max_signal <= 0) { 1094 result = -EINVAL; 1095 goto fail_workqueue; 1096 } 1097 } 1098 1099 /* Mac80211 and therefore all drivers using SW crypto only 1100 * are able to handle PTK rekeys and Extended Key ID. 1101 */ 1102 if (!local->ops->set_key) { 1103 wiphy_ext_feature_set(local->hw.wiphy, 1104 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1105 wiphy_ext_feature_set(local->hw.wiphy, 1106 NL80211_EXT_FEATURE_EXT_KEY_ID); 1107 } 1108 1109 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1110 wiphy_ext_feature_set(local->hw.wiphy, 1111 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1112 1113 /* 1114 * Calculate scan IE length -- we need this to alloc 1115 * memory and to subtract from the driver limit. It 1116 * includes the DS Params, (extended) supported rates, and HT 1117 * information -- SSID is the driver's responsibility. 1118 */ 1119 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1120 3 /* DS Params */; 1121 if (supp_ht) 1122 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1123 1124 if (supp_vht) 1125 local->scan_ies_len += 1126 2 + sizeof(struct ieee80211_vht_cap); 1127 1128 /* HE cap element is variable in size - set len to allow max size */ 1129 /* 1130 * TODO: 1 is added at the end of the calculation to accommodate for 1131 * the temporary placing of the HE capabilities IE under EXT. 1132 * Remove it once it is placed in the final place. 1133 */ 1134 if (supp_he) 1135 local->scan_ies_len += 1136 2 + sizeof(struct ieee80211_he_cap_elem) + 1137 sizeof(struct ieee80211_he_mcs_nss_supp) + 1138 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1139 1140 if (!local->ops->hw_scan) { 1141 /* For hw_scan, driver needs to set these up. */ 1142 local->hw.wiphy->max_scan_ssids = 4; 1143 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1144 } 1145 1146 /* 1147 * If the driver supports any scan IEs, then assume the 1148 * limit includes the IEs mac80211 will add, otherwise 1149 * leave it at zero and let the driver sort it out; we 1150 * still pass our IEs to the driver but userspace will 1151 * not be allowed to in that case. 1152 */ 1153 if (local->hw.wiphy->max_scan_ie_len) 1154 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1155 1156 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1157 local->hw.n_cipher_schemes))) { 1158 result = -EINVAL; 1159 goto fail_workqueue; 1160 } 1161 1162 result = ieee80211_init_cipher_suites(local); 1163 if (result < 0) 1164 goto fail_workqueue; 1165 1166 if (!local->ops->remain_on_channel) 1167 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1168 1169 /* mac80211 based drivers don't support internal TDLS setup */ 1170 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1171 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1172 1173 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1174 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1175 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1176 1177 /* mac80211 supports multi BSSID, if the driver supports it */ 1178 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1179 local->hw.wiphy->support_mbssid = true; 1180 if (ieee80211_hw_check(&local->hw, 1181 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1182 local->hw.wiphy->support_only_he_mbssid = true; 1183 else 1184 local->ext_capa[2] |= 1185 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1186 } 1187 1188 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1189 1190 /* 1191 * We use the number of queues for feature tests (QoS, HT) internally 1192 * so restrict them appropriately. 1193 */ 1194 if (hw->queues > IEEE80211_MAX_QUEUES) 1195 hw->queues = IEEE80211_MAX_QUEUES; 1196 1197 local->workqueue = 1198 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1199 if (!local->workqueue) { 1200 result = -ENOMEM; 1201 goto fail_workqueue; 1202 } 1203 1204 /* 1205 * The hardware needs headroom for sending the frame, 1206 * and we need some headroom for passing the frame to monitor 1207 * interfaces, but never both at the same time. 1208 */ 1209 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1210 IEEE80211_TX_STATUS_HEADROOM); 1211 1212 /* 1213 * if the driver doesn't specify a max listen interval we 1214 * use 5 which should be a safe default 1215 */ 1216 if (local->hw.max_listen_interval == 0) 1217 local->hw.max_listen_interval = 5; 1218 1219 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1220 1221 local->dynamic_ps_forced_timeout = -1; 1222 1223 if (!local->hw.max_nan_de_entries) 1224 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1225 1226 if (!local->hw.weight_multiplier) 1227 local->hw.weight_multiplier = 1; 1228 1229 ieee80211_wep_init(local); 1230 1231 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1232 1233 ieee80211_led_init(local); 1234 1235 result = ieee80211_txq_setup_flows(local); 1236 if (result) 1237 goto fail_flows; 1238 1239 rtnl_lock(); 1240 result = ieee80211_init_rate_ctrl_alg(local, 1241 hw->rate_control_algorithm); 1242 rtnl_unlock(); 1243 if (result < 0) { 1244 wiphy_debug(local->hw.wiphy, 1245 "Failed to initialize rate control algorithm\n"); 1246 goto fail_rate; 1247 } 1248 1249 if (local->rate_ctrl) { 1250 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1251 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1252 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1253 } 1254 1255 /* 1256 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1257 * or have it when we don't, copy the sband structure and set/clear it. 1258 * This is necessary because rate scaling algorithms could be switched 1259 * and have different support values. 1260 * Print a message so that in the common case the reallocation can be 1261 * avoided. 1262 */ 1263 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1264 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1265 struct ieee80211_supported_band *sband; 1266 bool local_cap, ie_cap; 1267 1268 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1269 1270 sband = local->hw.wiphy->bands[band]; 1271 if (!sband || !sband->vht_cap.vht_supported) 1272 continue; 1273 1274 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1275 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1276 1277 if (local_cap == ie_cap) 1278 continue; 1279 1280 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1281 if (!sband) { 1282 result = -ENOMEM; 1283 goto fail_rate; 1284 } 1285 1286 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1287 band); 1288 1289 sband->vht_cap.vht_mcs.tx_highest ^= 1290 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1291 1292 local->hw.wiphy->bands[band] = sband; 1293 local->sband_allocated |= BIT(band); 1294 } 1295 1296 result = wiphy_register(local->hw.wiphy); 1297 if (result < 0) 1298 goto fail_wiphy_register; 1299 1300 debugfs_hw_add(local); 1301 rate_control_add_debugfs(local); 1302 1303 rtnl_lock(); 1304 wiphy_lock(hw->wiphy); 1305 1306 /* add one default STA interface if supported */ 1307 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1308 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1309 struct vif_params params = {0}; 1310 1311 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1312 NL80211_IFTYPE_STATION, ¶ms); 1313 if (result) 1314 wiphy_warn(local->hw.wiphy, 1315 "Failed to add default virtual iface\n"); 1316 } 1317 1318 wiphy_unlock(hw->wiphy); 1319 rtnl_unlock(); 1320 1321 #ifdef CONFIG_INET 1322 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1323 result = register_inetaddr_notifier(&local->ifa_notifier); 1324 if (result) 1325 goto fail_ifa; 1326 #endif 1327 1328 #if IS_ENABLED(CONFIG_IPV6) 1329 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1330 result = register_inet6addr_notifier(&local->ifa6_notifier); 1331 if (result) 1332 goto fail_ifa6; 1333 #endif 1334 1335 return 0; 1336 1337 #if IS_ENABLED(CONFIG_IPV6) 1338 fail_ifa6: 1339 #ifdef CONFIG_INET 1340 unregister_inetaddr_notifier(&local->ifa_notifier); 1341 #endif 1342 #endif 1343 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1344 fail_ifa: 1345 #endif 1346 wiphy_unregister(local->hw.wiphy); 1347 fail_wiphy_register: 1348 rtnl_lock(); 1349 rate_control_deinitialize(local); 1350 ieee80211_remove_interfaces(local); 1351 rtnl_unlock(); 1352 fail_rate: 1353 fail_flows: 1354 ieee80211_led_exit(local); 1355 destroy_workqueue(local->workqueue); 1356 fail_workqueue: 1357 if (local->wiphy_ciphers_allocated) 1358 kfree(local->hw.wiphy->cipher_suites); 1359 kfree(local->int_scan_req); 1360 return result; 1361 } 1362 EXPORT_SYMBOL(ieee80211_register_hw); 1363 1364 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1365 { 1366 struct ieee80211_local *local = hw_to_local(hw); 1367 1368 tasklet_kill(&local->tx_pending_tasklet); 1369 tasklet_kill(&local->tasklet); 1370 1371 #ifdef CONFIG_INET 1372 unregister_inetaddr_notifier(&local->ifa_notifier); 1373 #endif 1374 #if IS_ENABLED(CONFIG_IPV6) 1375 unregister_inet6addr_notifier(&local->ifa6_notifier); 1376 #endif 1377 1378 rtnl_lock(); 1379 1380 /* 1381 * At this point, interface list manipulations are fine 1382 * because the driver cannot be handing us frames any 1383 * more and the tasklet is killed. 1384 */ 1385 ieee80211_remove_interfaces(local); 1386 1387 rtnl_unlock(); 1388 1389 cancel_delayed_work_sync(&local->roc_work); 1390 cancel_work_sync(&local->restart_work); 1391 cancel_work_sync(&local->reconfig_filter); 1392 cancel_work_sync(&local->tdls_chsw_work); 1393 flush_work(&local->sched_scan_stopped_work); 1394 flush_work(&local->radar_detected_work); 1395 1396 ieee80211_clear_tx_pending(local); 1397 rate_control_deinitialize(local); 1398 1399 if (skb_queue_len(&local->skb_queue) || 1400 skb_queue_len(&local->skb_queue_unreliable)) 1401 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1402 skb_queue_purge(&local->skb_queue); 1403 skb_queue_purge(&local->skb_queue_unreliable); 1404 skb_queue_purge(&local->skb_queue_tdls_chsw); 1405 1406 wiphy_unregister(local->hw.wiphy); 1407 destroy_workqueue(local->workqueue); 1408 ieee80211_led_exit(local); 1409 kfree(local->int_scan_req); 1410 } 1411 EXPORT_SYMBOL(ieee80211_unregister_hw); 1412 1413 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1414 { 1415 WARN_ONCE(1, "Have pending ack frames!\n"); 1416 kfree_skb(p); 1417 return 0; 1418 } 1419 1420 void ieee80211_free_hw(struct ieee80211_hw *hw) 1421 { 1422 struct ieee80211_local *local = hw_to_local(hw); 1423 enum nl80211_band band; 1424 1425 mutex_destroy(&local->iflist_mtx); 1426 mutex_destroy(&local->mtx); 1427 1428 if (local->wiphy_ciphers_allocated) 1429 kfree(local->hw.wiphy->cipher_suites); 1430 1431 idr_for_each(&local->ack_status_frames, 1432 ieee80211_free_ack_frame, NULL); 1433 idr_destroy(&local->ack_status_frames); 1434 1435 sta_info_stop(local); 1436 1437 ieee80211_free_led_names(local); 1438 1439 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1440 if (!(local->sband_allocated & BIT(band))) 1441 continue; 1442 kfree(local->hw.wiphy->bands[band]); 1443 } 1444 1445 wiphy_free(local->hw.wiphy); 1446 } 1447 EXPORT_SYMBOL(ieee80211_free_hw); 1448 1449 static int __init ieee80211_init(void) 1450 { 1451 struct sk_buff *skb; 1452 int ret; 1453 1454 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1455 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1456 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1457 1458 ret = rc80211_minstrel_init(); 1459 if (ret) 1460 return ret; 1461 1462 ret = ieee80211_iface_init(); 1463 if (ret) 1464 goto err_netdev; 1465 1466 return 0; 1467 err_netdev: 1468 rc80211_minstrel_exit(); 1469 1470 return ret; 1471 } 1472 1473 static void __exit ieee80211_exit(void) 1474 { 1475 rc80211_minstrel_exit(); 1476 1477 ieee80211s_stop(); 1478 1479 ieee80211_iface_exit(); 1480 1481 rcu_barrier(); 1482 } 1483 1484 1485 subsys_initcall(ieee80211_init); 1486 module_exit(ieee80211_exit); 1487 1488 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1489 MODULE_LICENSE("GPL"); 1490