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; 255 256 /* wait for scan work complete */ 257 flush_workqueue(local->workqueue); 258 flush_work(&local->sched_scan_stopped_work); 259 260 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 261 "%s called with hardware scan in progress\n", __func__); 262 263 flush_work(&local->radar_detected_work); 264 /* we might do interface manipulations, so need both */ 265 rtnl_lock(); 266 wiphy_lock(local->hw.wiphy); 267 list_for_each_entry(sdata, &local->interfaces, list) { 268 /* 269 * XXX: there may be more work for other vif types and even 270 * for station mode: a good thing would be to run most of 271 * the iface type's dependent _stop (ieee80211_mg_stop, 272 * ieee80211_ibss_stop) etc... 273 * For now, fix only the specific bug that was seen: race 274 * between csa_connection_drop_work and us. 275 */ 276 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 277 /* 278 * This worker is scheduled from the iface worker that 279 * runs on mac80211's workqueue, so we can't be 280 * scheduling this worker after the cancel right here. 281 * The exception is ieee80211_chswitch_done. 282 * Then we can have a race... 283 */ 284 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 285 if (sdata->vif.csa_active) { 286 sdata_lock(sdata); 287 ieee80211_sta_connection_lost(sdata, 288 sdata->u.mgd.associated->bssid, 289 WLAN_REASON_UNSPECIFIED, false); 290 sdata_unlock(sdata); 291 } 292 } 293 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 294 } 295 ieee80211_scan_cancel(local); 296 297 /* make sure any new ROC will consider local->in_reconfig */ 298 flush_delayed_work(&local->roc_work); 299 flush_work(&local->hw_roc_done); 300 301 /* wait for all packet processing to be done */ 302 synchronize_net(); 303 304 ieee80211_reconfig(local); 305 wiphy_unlock(local->hw.wiphy); 306 rtnl_unlock(); 307 } 308 309 void ieee80211_restart_hw(struct ieee80211_hw *hw) 310 { 311 struct ieee80211_local *local = hw_to_local(hw); 312 313 trace_api_restart_hw(local); 314 315 wiphy_info(hw->wiphy, 316 "Hardware restart was requested\n"); 317 318 /* use this reason, ieee80211_reconfig will unblock it */ 319 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 320 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 321 false); 322 323 /* 324 * Stop all Rx during the reconfig. We don't want state changes 325 * or driver callbacks while this is in progress. 326 */ 327 local->in_reconfig = true; 328 barrier(); 329 330 queue_work(system_freezable_wq, &local->restart_work); 331 } 332 EXPORT_SYMBOL(ieee80211_restart_hw); 333 334 #ifdef CONFIG_INET 335 static int ieee80211_ifa_changed(struct notifier_block *nb, 336 unsigned long data, void *arg) 337 { 338 struct in_ifaddr *ifa = arg; 339 struct ieee80211_local *local = 340 container_of(nb, struct ieee80211_local, 341 ifa_notifier); 342 struct net_device *ndev = ifa->ifa_dev->dev; 343 struct wireless_dev *wdev = ndev->ieee80211_ptr; 344 struct in_device *idev; 345 struct ieee80211_sub_if_data *sdata; 346 struct ieee80211_bss_conf *bss_conf; 347 struct ieee80211_if_managed *ifmgd; 348 int c = 0; 349 350 /* Make sure it's our interface that got changed */ 351 if (!wdev) 352 return NOTIFY_DONE; 353 354 if (wdev->wiphy != local->hw.wiphy) 355 return NOTIFY_DONE; 356 357 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 358 bss_conf = &sdata->vif.bss_conf; 359 360 /* ARP filtering is only supported in managed mode */ 361 if (sdata->vif.type != NL80211_IFTYPE_STATION) 362 return NOTIFY_DONE; 363 364 idev = __in_dev_get_rtnl(sdata->dev); 365 if (!idev) 366 return NOTIFY_DONE; 367 368 ifmgd = &sdata->u.mgd; 369 sdata_lock(sdata); 370 371 /* Copy the addresses to the bss_conf list */ 372 ifa = rtnl_dereference(idev->ifa_list); 373 while (ifa) { 374 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 375 bss_conf->arp_addr_list[c] = ifa->ifa_address; 376 ifa = rtnl_dereference(ifa->ifa_next); 377 c++; 378 } 379 380 bss_conf->arp_addr_cnt = c; 381 382 /* Configure driver only if associated (which also implies it is up) */ 383 if (ifmgd->associated) 384 ieee80211_bss_info_change_notify(sdata, 385 BSS_CHANGED_ARP_FILTER); 386 387 sdata_unlock(sdata); 388 389 return NOTIFY_OK; 390 } 391 #endif 392 393 #if IS_ENABLED(CONFIG_IPV6) 394 static int ieee80211_ifa6_changed(struct notifier_block *nb, 395 unsigned long data, void *arg) 396 { 397 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 398 struct inet6_dev *idev = ifa->idev; 399 struct net_device *ndev = ifa->idev->dev; 400 struct ieee80211_local *local = 401 container_of(nb, struct ieee80211_local, ifa6_notifier); 402 struct wireless_dev *wdev = ndev->ieee80211_ptr; 403 struct ieee80211_sub_if_data *sdata; 404 405 /* Make sure it's our interface that got changed */ 406 if (!wdev || wdev->wiphy != local->hw.wiphy) 407 return NOTIFY_DONE; 408 409 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 410 411 /* 412 * For now only support station mode. This is mostly because 413 * doing AP would have to handle AP_VLAN in some way ... 414 */ 415 if (sdata->vif.type != NL80211_IFTYPE_STATION) 416 return NOTIFY_DONE; 417 418 drv_ipv6_addr_change(local, sdata, idev); 419 420 return NOTIFY_OK; 421 } 422 #endif 423 424 /* There isn't a lot of sense in it, but you can transmit anything you like */ 425 static const struct ieee80211_txrx_stypes 426 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 427 [NL80211_IFTYPE_ADHOC] = { 428 .tx = 0xffff, 429 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 430 BIT(IEEE80211_STYPE_AUTH >> 4) | 431 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 432 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 433 }, 434 [NL80211_IFTYPE_STATION] = { 435 .tx = 0xffff, 436 /* 437 * To support Pre Association Security Negotiation (PASN) while 438 * already associated to one AP, allow user space to register to 439 * Rx authentication frames, so that the user space logic would 440 * be able to receive/handle authentication frames from a 441 * different AP as part of PASN. 442 * It is expected that user space would intelligently register 443 * for Rx authentication frames, i.e., only when PASN is used 444 * and configure a match filter only for PASN authentication 445 * algorithm, as otherwise the MLME functionality of mac80211 446 * would be broken. 447 */ 448 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 449 BIT(IEEE80211_STYPE_AUTH >> 4) | 450 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 451 }, 452 [NL80211_IFTYPE_AP] = { 453 .tx = 0xffff, 454 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 455 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 457 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 458 BIT(IEEE80211_STYPE_AUTH >> 4) | 459 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 460 BIT(IEEE80211_STYPE_ACTION >> 4), 461 }, 462 [NL80211_IFTYPE_AP_VLAN] = { 463 /* copy AP */ 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_P2P_CLIENT] = { 474 .tx = 0xffff, 475 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 476 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 477 }, 478 [NL80211_IFTYPE_P2P_GO] = { 479 .tx = 0xffff, 480 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 481 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 483 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 484 BIT(IEEE80211_STYPE_AUTH >> 4) | 485 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 486 BIT(IEEE80211_STYPE_ACTION >> 4), 487 }, 488 [NL80211_IFTYPE_MESH_POINT] = { 489 .tx = 0xffff, 490 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 491 BIT(IEEE80211_STYPE_AUTH >> 4) | 492 BIT(IEEE80211_STYPE_DEAUTH >> 4), 493 }, 494 [NL80211_IFTYPE_P2P_DEVICE] = { 495 .tx = 0xffff, 496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 497 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 498 }, 499 }; 500 501 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 502 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 503 IEEE80211_HT_AMPDU_PARM_DENSITY, 504 505 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 506 IEEE80211_HT_CAP_MAX_AMSDU | 507 IEEE80211_HT_CAP_SGI_20 | 508 IEEE80211_HT_CAP_SGI_40 | 509 IEEE80211_HT_CAP_TX_STBC | 510 IEEE80211_HT_CAP_RX_STBC | 511 IEEE80211_HT_CAP_LDPC_CODING | 512 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 513 .mcs = { 514 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 515 0xff, 0xff, 0xff, 0xff, 0xff, }, 516 }, 517 }; 518 519 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 520 .vht_cap_info = 521 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 522 IEEE80211_VHT_CAP_SHORT_GI_80 | 523 IEEE80211_VHT_CAP_SHORT_GI_160 | 524 IEEE80211_VHT_CAP_RXSTBC_MASK | 525 IEEE80211_VHT_CAP_TXSTBC | 526 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 527 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 528 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 529 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 530 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 531 .supp_mcs = { 532 .rx_mcs_map = cpu_to_le16(~0), 533 .tx_mcs_map = cpu_to_le16(~0), 534 }, 535 }; 536 537 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 538 const struct ieee80211_ops *ops, 539 const char *requested_name) 540 { 541 struct ieee80211_local *local; 542 int priv_size, i; 543 struct wiphy *wiphy; 544 bool use_chanctx; 545 546 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 547 !ops->add_interface || !ops->remove_interface || 548 !ops->configure_filter)) 549 return NULL; 550 551 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 552 return NULL; 553 554 /* check all or no channel context operations exist */ 555 i = !!ops->add_chanctx + !!ops->remove_chanctx + 556 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 557 !!ops->unassign_vif_chanctx; 558 if (WARN_ON(i != 0 && i != 5)) 559 return NULL; 560 use_chanctx = i == 5; 561 562 /* Ensure 32-byte alignment of our private data and hw private data. 563 * We use the wiphy priv data for both our ieee80211_local and for 564 * the driver's private data 565 * 566 * In memory it'll be like this: 567 * 568 * +-------------------------+ 569 * | struct wiphy | 570 * +-------------------------+ 571 * | struct ieee80211_local | 572 * +-------------------------+ 573 * | driver's private data | 574 * +-------------------------+ 575 * 576 */ 577 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 578 579 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 580 581 if (!wiphy) 582 return NULL; 583 584 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 585 586 wiphy->privid = mac80211_wiphy_privid; 587 588 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 589 WIPHY_FLAG_4ADDR_AP | 590 WIPHY_FLAG_4ADDR_STATION | 591 WIPHY_FLAG_REPORTS_OBSS | 592 WIPHY_FLAG_OFFCHAN_TX; 593 594 if (!use_chanctx || ops->remain_on_channel) 595 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 596 597 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 598 NL80211_FEATURE_SAE | 599 NL80211_FEATURE_HT_IBSS | 600 NL80211_FEATURE_VIF_TXPOWER | 601 NL80211_FEATURE_MAC_ON_CREATE | 602 NL80211_FEATURE_USERSPACE_MPM | 603 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 604 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 605 wiphy_ext_feature_set(wiphy, 606 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 607 wiphy_ext_feature_set(wiphy, 608 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 609 wiphy_ext_feature_set(wiphy, 610 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 611 wiphy_ext_feature_set(wiphy, 612 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 613 614 if (!ops->hw_scan) { 615 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 616 NL80211_FEATURE_AP_SCAN; 617 /* 618 * if the driver behaves correctly using the probe request 619 * (template) from mac80211, then both of these should be 620 * supported even with hw scan - but let drivers opt in. 621 */ 622 wiphy_ext_feature_set(wiphy, 623 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 624 wiphy_ext_feature_set(wiphy, 625 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 626 } 627 628 if (!ops->set_key) 629 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 630 631 if (ops->wake_tx_queue) 632 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 633 634 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 635 636 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 637 638 local = wiphy_priv(wiphy); 639 640 if (sta_info_init(local)) 641 goto err_free; 642 643 local->hw.wiphy = wiphy; 644 645 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 646 647 local->ops = ops; 648 local->use_chanctx = use_chanctx; 649 650 /* 651 * We need a bit of data queued to build aggregates properly, so 652 * instruct the TCP stack to allow more than a single ms of data 653 * to be queued in the stack. The value is a bit-shift of 1 654 * second, so 7 is ~8ms of queued data. Only affects local TCP 655 * sockets. 656 * This is the default, anyhow - drivers may need to override it 657 * for local reasons (longer buffers, longer completion time, or 658 * similar). 659 */ 660 local->hw.tx_sk_pacing_shift = 7; 661 662 /* set up some defaults */ 663 local->hw.queues = 1; 664 local->hw.max_rates = 1; 665 local->hw.max_report_rates = 0; 666 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 667 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 668 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 669 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 670 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 671 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 672 IEEE80211_RADIOTAP_MCS_HAVE_GI | 673 IEEE80211_RADIOTAP_MCS_HAVE_BW; 674 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 675 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 676 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 677 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 678 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 679 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 680 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 681 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 682 683 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 684 685 wiphy->extended_capabilities = local->ext_capa; 686 wiphy->extended_capabilities_mask = local->ext_capa; 687 wiphy->extended_capabilities_len = 688 ARRAY_SIZE(local->ext_capa); 689 690 INIT_LIST_HEAD(&local->interfaces); 691 INIT_LIST_HEAD(&local->mon_list); 692 693 __hw_addr_init(&local->mc_list); 694 695 mutex_init(&local->iflist_mtx); 696 mutex_init(&local->mtx); 697 698 mutex_init(&local->key_mtx); 699 spin_lock_init(&local->filter_lock); 700 spin_lock_init(&local->rx_path_lock); 701 spin_lock_init(&local->queue_stop_reason_lock); 702 703 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 704 INIT_LIST_HEAD(&local->active_txqs[i]); 705 spin_lock_init(&local->active_txq_lock[i]); 706 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 707 local->aql_txq_limit_high[i] = 708 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 709 } 710 711 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 712 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 713 atomic_set(&local->aql_total_pending_airtime, 0); 714 715 INIT_LIST_HEAD(&local->chanctx_list); 716 mutex_init(&local->chanctx_mtx); 717 718 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 719 720 INIT_WORK(&local->restart_work, ieee80211_restart_work); 721 722 INIT_WORK(&local->radar_detected_work, 723 ieee80211_dfs_radar_detected_work); 724 725 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 726 local->smps_mode = IEEE80211_SMPS_OFF; 727 728 INIT_WORK(&local->dynamic_ps_enable_work, 729 ieee80211_dynamic_ps_enable_work); 730 INIT_WORK(&local->dynamic_ps_disable_work, 731 ieee80211_dynamic_ps_disable_work); 732 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 733 734 INIT_WORK(&local->sched_scan_stopped_work, 735 ieee80211_sched_scan_stopped_work); 736 737 INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work); 738 739 spin_lock_init(&local->ack_status_lock); 740 idr_init(&local->ack_status_frames); 741 742 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 743 skb_queue_head_init(&local->pending[i]); 744 atomic_set(&local->agg_queue_stop[i], 0); 745 } 746 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 747 748 if (ops->wake_tx_queue) 749 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 750 751 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 752 753 skb_queue_head_init(&local->skb_queue); 754 skb_queue_head_init(&local->skb_queue_unreliable); 755 skb_queue_head_init(&local->skb_queue_tdls_chsw); 756 757 ieee80211_alloc_led_names(local); 758 759 ieee80211_roc_setup(local); 760 761 local->hw.radiotap_timestamp.units_pos = -1; 762 local->hw.radiotap_timestamp.accuracy = -1; 763 764 return &local->hw; 765 err_free: 766 wiphy_free(wiphy); 767 return NULL; 768 } 769 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 770 771 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 772 { 773 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 774 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 775 int n_suites = 0, r = 0, w = 0; 776 u32 *suites; 777 static const u32 cipher_suites[] = { 778 /* keep WEP first, it may be removed below */ 779 WLAN_CIPHER_SUITE_WEP40, 780 WLAN_CIPHER_SUITE_WEP104, 781 WLAN_CIPHER_SUITE_TKIP, 782 WLAN_CIPHER_SUITE_CCMP, 783 WLAN_CIPHER_SUITE_CCMP_256, 784 WLAN_CIPHER_SUITE_GCMP, 785 WLAN_CIPHER_SUITE_GCMP_256, 786 787 /* keep last -- depends on hw flags! */ 788 WLAN_CIPHER_SUITE_AES_CMAC, 789 WLAN_CIPHER_SUITE_BIP_CMAC_256, 790 WLAN_CIPHER_SUITE_BIP_GMAC_128, 791 WLAN_CIPHER_SUITE_BIP_GMAC_256, 792 }; 793 794 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 795 local->hw.wiphy->cipher_suites) { 796 /* If the driver advertises, or doesn't support SW crypto, 797 * we only need to remove WEP if necessary. 798 */ 799 if (have_wep) 800 return 0; 801 802 /* well if it has _no_ ciphers ... fine */ 803 if (!local->hw.wiphy->n_cipher_suites) 804 return 0; 805 806 /* Driver provides cipher suites, but we need to exclude WEP */ 807 suites = kmemdup(local->hw.wiphy->cipher_suites, 808 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 809 GFP_KERNEL); 810 if (!suites) 811 return -ENOMEM; 812 813 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 814 u32 suite = local->hw.wiphy->cipher_suites[r]; 815 816 if (suite == WLAN_CIPHER_SUITE_WEP40 || 817 suite == WLAN_CIPHER_SUITE_WEP104) 818 continue; 819 suites[w++] = suite; 820 } 821 } else if (!local->hw.cipher_schemes) { 822 /* If the driver doesn't have cipher schemes, there's nothing 823 * else to do other than assign the (software supported and 824 * perhaps offloaded) cipher suites. 825 */ 826 local->hw.wiphy->cipher_suites = cipher_suites; 827 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 828 829 if (!have_mfp) 830 local->hw.wiphy->n_cipher_suites -= 4; 831 832 if (!have_wep) { 833 local->hw.wiphy->cipher_suites += 2; 834 local->hw.wiphy->n_cipher_suites -= 2; 835 } 836 837 /* not dynamically allocated, so just return */ 838 return 0; 839 } else { 840 const struct ieee80211_cipher_scheme *cs; 841 842 cs = local->hw.cipher_schemes; 843 844 /* Driver specifies cipher schemes only (but not cipher suites 845 * including the schemes) 846 * 847 * We start counting ciphers defined by schemes, TKIP, CCMP, 848 * CCMP-256, GCMP, and GCMP-256 849 */ 850 n_suites = local->hw.n_cipher_schemes + 5; 851 852 /* check if we have WEP40 and WEP104 */ 853 if (have_wep) 854 n_suites += 2; 855 856 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 857 * BIP-GMAC-256 858 */ 859 if (have_mfp) 860 n_suites += 4; 861 862 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 863 if (!suites) 864 return -ENOMEM; 865 866 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 867 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 868 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 869 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 870 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 871 872 if (have_wep) { 873 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 874 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 875 } 876 877 if (have_mfp) { 878 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 879 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 880 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 881 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 882 } 883 884 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 885 suites[w++] = cs[r].cipher; 886 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 887 kfree(suites); 888 return -EINVAL; 889 } 890 } 891 } 892 893 local->hw.wiphy->cipher_suites = suites; 894 local->hw.wiphy->n_cipher_suites = w; 895 local->wiphy_ciphers_allocated = true; 896 897 return 0; 898 } 899 900 int ieee80211_register_hw(struct ieee80211_hw *hw) 901 { 902 struct ieee80211_local *local = hw_to_local(hw); 903 int result, i; 904 enum nl80211_band band; 905 int channels, max_bitrates; 906 bool supp_ht, supp_vht, supp_he; 907 struct cfg80211_chan_def dflt_chandef = {}; 908 909 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 910 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 911 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 912 return -EINVAL; 913 914 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 915 (!local->ops->tdls_channel_switch || 916 !local->ops->tdls_cancel_channel_switch || 917 !local->ops->tdls_recv_channel_switch)) 918 return -EOPNOTSUPP; 919 920 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 921 !local->ops->set_frag_threshold)) 922 return -EINVAL; 923 924 if (WARN_ON(local->hw.wiphy->interface_modes & 925 BIT(NL80211_IFTYPE_NAN) && 926 (!local->ops->start_nan || !local->ops->stop_nan))) 927 return -EINVAL; 928 929 #ifdef CONFIG_PM 930 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 931 return -EINVAL; 932 #endif 933 934 if (!local->use_chanctx) { 935 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 936 const struct ieee80211_iface_combination *comb; 937 938 comb = &local->hw.wiphy->iface_combinations[i]; 939 940 if (comb->num_different_channels > 1) 941 return -EINVAL; 942 } 943 } else { 944 /* DFS is not supported with multi-channel combinations yet */ 945 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 946 const struct ieee80211_iface_combination *comb; 947 948 comb = &local->hw.wiphy->iface_combinations[i]; 949 950 if (comb->radar_detect_widths && 951 comb->num_different_channels > 1) 952 return -EINVAL; 953 } 954 } 955 956 /* Only HW csum features are currently compatible with mac80211 */ 957 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 958 return -EINVAL; 959 960 if (hw->max_report_rates == 0) 961 hw->max_report_rates = hw->max_rates; 962 963 local->rx_chains = 1; 964 965 /* 966 * generic code guarantees at least one band, 967 * set this very early because much code assumes 968 * that hw.conf.channel is assigned 969 */ 970 channels = 0; 971 max_bitrates = 0; 972 supp_ht = false; 973 supp_vht = false; 974 supp_he = false; 975 for (band = 0; band < NUM_NL80211_BANDS; band++) { 976 struct ieee80211_supported_band *sband; 977 978 sband = local->hw.wiphy->bands[band]; 979 if (!sband) 980 continue; 981 982 if (!dflt_chandef.chan) { 983 /* 984 * Assign the first enabled channel to dflt_chandef 985 * from the list of channels 986 */ 987 for (i = 0; i < sband->n_channels; i++) 988 if (!(sband->channels[i].flags & 989 IEEE80211_CHAN_DISABLED)) 990 break; 991 /* if none found then use the first anyway */ 992 if (i == sband->n_channels) 993 i = 0; 994 cfg80211_chandef_create(&dflt_chandef, 995 &sband->channels[i], 996 NL80211_CHAN_NO_HT); 997 /* init channel we're on */ 998 if (!local->use_chanctx && !local->_oper_chandef.chan) { 999 local->hw.conf.chandef = dflt_chandef; 1000 local->_oper_chandef = dflt_chandef; 1001 } 1002 local->monitor_chandef = dflt_chandef; 1003 } 1004 1005 channels += sband->n_channels; 1006 1007 if (max_bitrates < sband->n_bitrates) 1008 max_bitrates = sband->n_bitrates; 1009 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1010 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1011 1012 if (!supp_he) 1013 supp_he = !!ieee80211_get_he_sta_cap(sband); 1014 1015 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1016 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1017 (supp_ht || supp_vht || supp_he))) 1018 return -EINVAL; 1019 1020 if (!sband->ht_cap.ht_supported) 1021 continue; 1022 1023 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1024 local->rx_chains = 1025 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1026 local->rx_chains); 1027 1028 /* no need to mask, SM_PS_DISABLED has all bits set */ 1029 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1030 IEEE80211_HT_CAP_SM_PS_SHIFT; 1031 } 1032 1033 /* if low-level driver supports AP, we also support VLAN. 1034 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1035 * based on their support to transmit SW encrypted packets. 1036 */ 1037 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1038 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1039 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1040 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1041 } 1042 1043 /* mac80211 always supports monitor */ 1044 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1045 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1046 1047 /* mac80211 doesn't support more than one IBSS interface right now */ 1048 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1049 const struct ieee80211_iface_combination *c; 1050 int j; 1051 1052 c = &hw->wiphy->iface_combinations[i]; 1053 1054 for (j = 0; j < c->n_limits; j++) 1055 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1056 c->limits[j].max > 1) 1057 return -EINVAL; 1058 } 1059 1060 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1061 sizeof(void *) * channels, GFP_KERNEL); 1062 if (!local->int_scan_req) 1063 return -ENOMEM; 1064 1065 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1066 if (!local->hw.wiphy->bands[band]) 1067 continue; 1068 local->int_scan_req->rates[band] = (u32) -1; 1069 } 1070 1071 #ifndef CONFIG_MAC80211_MESH 1072 /* mesh depends on Kconfig, but drivers should set it if they want */ 1073 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1074 #endif 1075 1076 /* if the underlying driver supports mesh, mac80211 will (at least) 1077 * provide routing of mesh authentication frames to userspace */ 1078 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1079 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1080 1081 /* mac80211 supports control port protocol changing */ 1082 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1083 1084 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1085 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1086 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1087 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1088 if (hw->max_signal <= 0) { 1089 result = -EINVAL; 1090 goto fail_workqueue; 1091 } 1092 } 1093 1094 /* Mac80211 and therefore all drivers using SW crypto only 1095 * are able to handle PTK rekeys and Extended Key ID. 1096 */ 1097 if (!local->ops->set_key) { 1098 wiphy_ext_feature_set(local->hw.wiphy, 1099 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1100 wiphy_ext_feature_set(local->hw.wiphy, 1101 NL80211_EXT_FEATURE_EXT_KEY_ID); 1102 } 1103 1104 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1105 wiphy_ext_feature_set(local->hw.wiphy, 1106 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1107 1108 /* 1109 * Calculate scan IE length -- we need this to alloc 1110 * memory and to subtract from the driver limit. It 1111 * includes the DS Params, (extended) supported rates, and HT 1112 * information -- SSID is the driver's responsibility. 1113 */ 1114 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1115 3 /* DS Params */; 1116 if (supp_ht) 1117 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1118 1119 if (supp_vht) 1120 local->scan_ies_len += 1121 2 + sizeof(struct ieee80211_vht_cap); 1122 1123 /* HE cap element is variable in size - set len to allow max size */ 1124 /* 1125 * TODO: 1 is added at the end of the calculation to accommodate for 1126 * the temporary placing of the HE capabilities IE under EXT. 1127 * Remove it once it is placed in the final place. 1128 */ 1129 if (supp_he) 1130 local->scan_ies_len += 1131 2 + sizeof(struct ieee80211_he_cap_elem) + 1132 sizeof(struct ieee80211_he_mcs_nss_supp) + 1133 IEEE80211_HE_PPE_THRES_MAX_LEN + 1; 1134 1135 if (!local->ops->hw_scan) { 1136 /* For hw_scan, driver needs to set these up. */ 1137 local->hw.wiphy->max_scan_ssids = 4; 1138 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1139 } 1140 1141 /* 1142 * If the driver supports any scan IEs, then assume the 1143 * limit includes the IEs mac80211 will add, otherwise 1144 * leave it at zero and let the driver sort it out; we 1145 * still pass our IEs to the driver but userspace will 1146 * not be allowed to in that case. 1147 */ 1148 if (local->hw.wiphy->max_scan_ie_len) 1149 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1150 1151 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1152 local->hw.n_cipher_schemes))) { 1153 result = -EINVAL; 1154 goto fail_workqueue; 1155 } 1156 1157 result = ieee80211_init_cipher_suites(local); 1158 if (result < 0) 1159 goto fail_workqueue; 1160 1161 if (!local->ops->remain_on_channel) 1162 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1163 1164 /* mac80211 based drivers don't support internal TDLS setup */ 1165 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1166 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1167 1168 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1169 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1170 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1171 1172 /* mac80211 supports multi BSSID, if the driver supports it */ 1173 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1174 local->hw.wiphy->support_mbssid = true; 1175 if (ieee80211_hw_check(&local->hw, 1176 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1177 local->hw.wiphy->support_only_he_mbssid = true; 1178 else 1179 local->ext_capa[2] |= 1180 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1181 } 1182 1183 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1184 1185 /* 1186 * We use the number of queues for feature tests (QoS, HT) internally 1187 * so restrict them appropriately. 1188 */ 1189 if (hw->queues > IEEE80211_MAX_QUEUES) 1190 hw->queues = IEEE80211_MAX_QUEUES; 1191 1192 local->workqueue = 1193 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1194 if (!local->workqueue) { 1195 result = -ENOMEM; 1196 goto fail_workqueue; 1197 } 1198 1199 /* 1200 * The hardware needs headroom for sending the frame, 1201 * and we need some headroom for passing the frame to monitor 1202 * interfaces, but never both at the same time. 1203 */ 1204 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1205 IEEE80211_TX_STATUS_HEADROOM); 1206 1207 /* 1208 * if the driver doesn't specify a max listen interval we 1209 * use 5 which should be a safe default 1210 */ 1211 if (local->hw.max_listen_interval == 0) 1212 local->hw.max_listen_interval = 5; 1213 1214 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1215 1216 local->dynamic_ps_forced_timeout = -1; 1217 1218 if (!local->hw.max_nan_de_entries) 1219 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1220 1221 if (!local->hw.weight_multiplier) 1222 local->hw.weight_multiplier = 1; 1223 1224 ieee80211_wep_init(local); 1225 1226 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1227 1228 ieee80211_led_init(local); 1229 1230 result = ieee80211_txq_setup_flows(local); 1231 if (result) 1232 goto fail_flows; 1233 1234 rtnl_lock(); 1235 result = ieee80211_init_rate_ctrl_alg(local, 1236 hw->rate_control_algorithm); 1237 rtnl_unlock(); 1238 if (result < 0) { 1239 wiphy_debug(local->hw.wiphy, 1240 "Failed to initialize rate control algorithm\n"); 1241 goto fail_rate; 1242 } 1243 1244 if (local->rate_ctrl) { 1245 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1246 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1247 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1248 } 1249 1250 /* 1251 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1252 * or have it when we don't, copy the sband structure and set/clear it. 1253 * This is necessary because rate scaling algorithms could be switched 1254 * and have different support values. 1255 * Print a message so that in the common case the reallocation can be 1256 * avoided. 1257 */ 1258 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1259 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1260 struct ieee80211_supported_band *sband; 1261 bool local_cap, ie_cap; 1262 1263 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1264 1265 sband = local->hw.wiphy->bands[band]; 1266 if (!sband || !sband->vht_cap.vht_supported) 1267 continue; 1268 1269 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1270 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1271 1272 if (local_cap == ie_cap) 1273 continue; 1274 1275 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1276 if (!sband) { 1277 result = -ENOMEM; 1278 goto fail_rate; 1279 } 1280 1281 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1282 band); 1283 1284 sband->vht_cap.vht_mcs.tx_highest ^= 1285 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1286 1287 local->hw.wiphy->bands[band] = sband; 1288 local->sband_allocated |= BIT(band); 1289 } 1290 1291 result = wiphy_register(local->hw.wiphy); 1292 if (result < 0) 1293 goto fail_wiphy_register; 1294 1295 debugfs_hw_add(local); 1296 rate_control_add_debugfs(local); 1297 1298 rtnl_lock(); 1299 wiphy_lock(hw->wiphy); 1300 1301 /* add one default STA interface if supported */ 1302 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1303 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1304 struct vif_params params = {0}; 1305 1306 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1307 NL80211_IFTYPE_STATION, ¶ms); 1308 if (result) 1309 wiphy_warn(local->hw.wiphy, 1310 "Failed to add default virtual iface\n"); 1311 } 1312 1313 wiphy_unlock(hw->wiphy); 1314 rtnl_unlock(); 1315 1316 #ifdef CONFIG_INET 1317 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1318 result = register_inetaddr_notifier(&local->ifa_notifier); 1319 if (result) 1320 goto fail_ifa; 1321 #endif 1322 1323 #if IS_ENABLED(CONFIG_IPV6) 1324 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1325 result = register_inet6addr_notifier(&local->ifa6_notifier); 1326 if (result) 1327 goto fail_ifa6; 1328 #endif 1329 1330 return 0; 1331 1332 #if IS_ENABLED(CONFIG_IPV6) 1333 fail_ifa6: 1334 #ifdef CONFIG_INET 1335 unregister_inetaddr_notifier(&local->ifa_notifier); 1336 #endif 1337 #endif 1338 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1339 fail_ifa: 1340 #endif 1341 wiphy_unregister(local->hw.wiphy); 1342 fail_wiphy_register: 1343 rtnl_lock(); 1344 rate_control_deinitialize(local); 1345 ieee80211_remove_interfaces(local); 1346 rtnl_unlock(); 1347 fail_rate: 1348 fail_flows: 1349 ieee80211_led_exit(local); 1350 destroy_workqueue(local->workqueue); 1351 fail_workqueue: 1352 if (local->wiphy_ciphers_allocated) 1353 kfree(local->hw.wiphy->cipher_suites); 1354 kfree(local->int_scan_req); 1355 return result; 1356 } 1357 EXPORT_SYMBOL(ieee80211_register_hw); 1358 1359 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1360 { 1361 struct ieee80211_local *local = hw_to_local(hw); 1362 1363 tasklet_kill(&local->tx_pending_tasklet); 1364 tasklet_kill(&local->tasklet); 1365 1366 #ifdef CONFIG_INET 1367 unregister_inetaddr_notifier(&local->ifa_notifier); 1368 #endif 1369 #if IS_ENABLED(CONFIG_IPV6) 1370 unregister_inet6addr_notifier(&local->ifa6_notifier); 1371 #endif 1372 1373 rtnl_lock(); 1374 1375 /* 1376 * At this point, interface list manipulations are fine 1377 * because the driver cannot be handing us frames any 1378 * more and the tasklet is killed. 1379 */ 1380 ieee80211_remove_interfaces(local); 1381 1382 rtnl_unlock(); 1383 1384 cancel_delayed_work_sync(&local->roc_work); 1385 cancel_work_sync(&local->restart_work); 1386 cancel_work_sync(&local->reconfig_filter); 1387 cancel_work_sync(&local->tdls_chsw_work); 1388 flush_work(&local->sched_scan_stopped_work); 1389 flush_work(&local->radar_detected_work); 1390 1391 ieee80211_clear_tx_pending(local); 1392 rate_control_deinitialize(local); 1393 1394 if (skb_queue_len(&local->skb_queue) || 1395 skb_queue_len(&local->skb_queue_unreliable)) 1396 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1397 skb_queue_purge(&local->skb_queue); 1398 skb_queue_purge(&local->skb_queue_unreliable); 1399 skb_queue_purge(&local->skb_queue_tdls_chsw); 1400 1401 wiphy_unregister(local->hw.wiphy); 1402 destroy_workqueue(local->workqueue); 1403 ieee80211_led_exit(local); 1404 kfree(local->int_scan_req); 1405 } 1406 EXPORT_SYMBOL(ieee80211_unregister_hw); 1407 1408 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1409 { 1410 WARN_ONCE(1, "Have pending ack frames!\n"); 1411 kfree_skb(p); 1412 return 0; 1413 } 1414 1415 void ieee80211_free_hw(struct ieee80211_hw *hw) 1416 { 1417 struct ieee80211_local *local = hw_to_local(hw); 1418 enum nl80211_band band; 1419 1420 mutex_destroy(&local->iflist_mtx); 1421 mutex_destroy(&local->mtx); 1422 1423 if (local->wiphy_ciphers_allocated) 1424 kfree(local->hw.wiphy->cipher_suites); 1425 1426 idr_for_each(&local->ack_status_frames, 1427 ieee80211_free_ack_frame, NULL); 1428 idr_destroy(&local->ack_status_frames); 1429 1430 sta_info_stop(local); 1431 1432 ieee80211_free_led_names(local); 1433 1434 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1435 if (!(local->sband_allocated & BIT(band))) 1436 continue; 1437 kfree(local->hw.wiphy->bands[band]); 1438 } 1439 1440 wiphy_free(local->hw.wiphy); 1441 } 1442 EXPORT_SYMBOL(ieee80211_free_hw); 1443 1444 static int __init ieee80211_init(void) 1445 { 1446 struct sk_buff *skb; 1447 int ret; 1448 1449 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1450 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1451 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1452 1453 ret = rc80211_minstrel_init(); 1454 if (ret) 1455 return ret; 1456 1457 ret = ieee80211_iface_init(); 1458 if (ret) 1459 goto err_netdev; 1460 1461 return 0; 1462 err_netdev: 1463 rc80211_minstrel_exit(); 1464 1465 return ret; 1466 } 1467 1468 static void __exit ieee80211_exit(void) 1469 { 1470 rc80211_minstrel_exit(); 1471 1472 ieee80211s_stop(); 1473 1474 ieee80211_iface_exit(); 1475 1476 rcu_barrier(); 1477 } 1478 1479 1480 subsys_initcall(ieee80211_init); 1481 module_exit(ieee80211_exit); 1482 1483 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1484 MODULE_LICENSE("GPL"); 1485