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) 2018-2022 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 flush_work(&local->radar_detected_work); 261 262 rtnl_lock(); 263 /* we might do interface manipulations, so need both */ 264 wiphy_lock(local->hw.wiphy); 265 266 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 267 "%s called with hardware scan in progress\n", __func__); 268 269 list_for_each_entry(sdata, &local->interfaces, list) { 270 /* 271 * XXX: there may be more work for other vif types and even 272 * for station mode: a good thing would be to run most of 273 * the iface type's dependent _stop (ieee80211_mg_stop, 274 * ieee80211_ibss_stop) etc... 275 * For now, fix only the specific bug that was seen: race 276 * between csa_connection_drop_work and us. 277 */ 278 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 279 /* 280 * This worker is scheduled from the iface worker that 281 * runs on mac80211's workqueue, so we can't be 282 * scheduling this worker after the cancel right here. 283 * The exception is ieee80211_chswitch_done. 284 * Then we can have a race... 285 */ 286 cancel_work_sync(&sdata->u.mgd.csa_connection_drop_work); 287 if (sdata->vif.csa_active) { 288 sdata_lock(sdata); 289 ieee80211_sta_connection_lost(sdata, 290 WLAN_REASON_UNSPECIFIED, 291 false); 292 sdata_unlock(sdata); 293 } 294 } 295 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 296 } 297 ieee80211_scan_cancel(local); 298 299 /* make sure any new ROC will consider local->in_reconfig */ 300 flush_delayed_work(&local->roc_work); 301 flush_work(&local->hw_roc_done); 302 303 /* wait for all packet processing to be done */ 304 synchronize_net(); 305 306 ret = ieee80211_reconfig(local); 307 wiphy_unlock(local->hw.wiphy); 308 309 if (ret) 310 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 311 312 rtnl_unlock(); 313 } 314 315 void ieee80211_restart_hw(struct ieee80211_hw *hw) 316 { 317 struct ieee80211_local *local = hw_to_local(hw); 318 319 trace_api_restart_hw(local); 320 321 wiphy_info(hw->wiphy, 322 "Hardware restart was requested\n"); 323 324 /* use this reason, ieee80211_reconfig will unblock it */ 325 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 326 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 327 false); 328 329 /* 330 * Stop all Rx during the reconfig. We don't want state changes 331 * or driver callbacks while this is in progress. 332 */ 333 local->in_reconfig = true; 334 barrier(); 335 336 queue_work(system_freezable_wq, &local->restart_work); 337 } 338 EXPORT_SYMBOL(ieee80211_restart_hw); 339 340 #ifdef CONFIG_INET 341 static int ieee80211_ifa_changed(struct notifier_block *nb, 342 unsigned long data, void *arg) 343 { 344 struct in_ifaddr *ifa = arg; 345 struct ieee80211_local *local = 346 container_of(nb, struct ieee80211_local, 347 ifa_notifier); 348 struct net_device *ndev = ifa->ifa_dev->dev; 349 struct wireless_dev *wdev = ndev->ieee80211_ptr; 350 struct in_device *idev; 351 struct ieee80211_sub_if_data *sdata; 352 struct ieee80211_bss_conf *bss_conf; 353 struct ieee80211_if_managed *ifmgd; 354 int c = 0; 355 356 /* Make sure it's our interface that got changed */ 357 if (!wdev) 358 return NOTIFY_DONE; 359 360 if (wdev->wiphy != local->hw.wiphy) 361 return NOTIFY_DONE; 362 363 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 364 bss_conf = &sdata->vif.bss_conf; 365 366 /* ARP filtering is only supported in managed mode */ 367 if (sdata->vif.type != NL80211_IFTYPE_STATION) 368 return NOTIFY_DONE; 369 370 idev = __in_dev_get_rtnl(sdata->dev); 371 if (!idev) 372 return NOTIFY_DONE; 373 374 ifmgd = &sdata->u.mgd; 375 sdata_lock(sdata); 376 377 /* Copy the addresses to the bss_conf list */ 378 ifa = rtnl_dereference(idev->ifa_list); 379 while (ifa) { 380 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 381 bss_conf->arp_addr_list[c] = ifa->ifa_address; 382 ifa = rtnl_dereference(ifa->ifa_next); 383 c++; 384 } 385 386 bss_conf->arp_addr_cnt = c; 387 388 /* Configure driver only if associated (which also implies it is up) */ 389 if (ifmgd->associated) 390 ieee80211_bss_info_change_notify(sdata, 391 BSS_CHANGED_ARP_FILTER); 392 393 sdata_unlock(sdata); 394 395 return NOTIFY_OK; 396 } 397 #endif 398 399 #if IS_ENABLED(CONFIG_IPV6) 400 static int ieee80211_ifa6_changed(struct notifier_block *nb, 401 unsigned long data, void *arg) 402 { 403 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 404 struct inet6_dev *idev = ifa->idev; 405 struct net_device *ndev = ifa->idev->dev; 406 struct ieee80211_local *local = 407 container_of(nb, struct ieee80211_local, ifa6_notifier); 408 struct wireless_dev *wdev = ndev->ieee80211_ptr; 409 struct ieee80211_sub_if_data *sdata; 410 411 /* Make sure it's our interface that got changed */ 412 if (!wdev || wdev->wiphy != local->hw.wiphy) 413 return NOTIFY_DONE; 414 415 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 416 417 /* 418 * For now only support station mode. This is mostly because 419 * doing AP would have to handle AP_VLAN in some way ... 420 */ 421 if (sdata->vif.type != NL80211_IFTYPE_STATION) 422 return NOTIFY_DONE; 423 424 drv_ipv6_addr_change(local, sdata, idev); 425 426 return NOTIFY_OK; 427 } 428 #endif 429 430 /* There isn't a lot of sense in it, but you can transmit anything you like */ 431 static const struct ieee80211_txrx_stypes 432 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 433 [NL80211_IFTYPE_ADHOC] = { 434 .tx = 0xffff, 435 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 436 BIT(IEEE80211_STYPE_AUTH >> 4) | 437 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 438 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 439 }, 440 [NL80211_IFTYPE_STATION] = { 441 .tx = 0xffff, 442 /* 443 * To support Pre Association Security Negotiation (PASN) while 444 * already associated to one AP, allow user space to register to 445 * Rx authentication frames, so that the user space logic would 446 * be able to receive/handle authentication frames from a 447 * different AP as part of PASN. 448 * It is expected that user space would intelligently register 449 * for Rx authentication frames, i.e., only when PASN is used 450 * and configure a match filter only for PASN authentication 451 * algorithm, as otherwise the MLME functionality of mac80211 452 * would be broken. 453 */ 454 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 455 BIT(IEEE80211_STYPE_AUTH >> 4) | 456 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 457 }, 458 [NL80211_IFTYPE_AP] = { 459 .tx = 0xffff, 460 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 461 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 462 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 463 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 464 BIT(IEEE80211_STYPE_AUTH >> 4) | 465 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 466 BIT(IEEE80211_STYPE_ACTION >> 4), 467 }, 468 [NL80211_IFTYPE_AP_VLAN] = { 469 /* copy AP */ 470 .tx = 0xffff, 471 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 472 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 473 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 474 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 475 BIT(IEEE80211_STYPE_AUTH >> 4) | 476 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 477 BIT(IEEE80211_STYPE_ACTION >> 4), 478 }, 479 [NL80211_IFTYPE_P2P_CLIENT] = { 480 .tx = 0xffff, 481 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 482 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 483 }, 484 [NL80211_IFTYPE_P2P_GO] = { 485 .tx = 0xffff, 486 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 487 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 488 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 489 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 490 BIT(IEEE80211_STYPE_AUTH >> 4) | 491 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 492 BIT(IEEE80211_STYPE_ACTION >> 4), 493 }, 494 [NL80211_IFTYPE_MESH_POINT] = { 495 .tx = 0xffff, 496 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 497 BIT(IEEE80211_STYPE_AUTH >> 4) | 498 BIT(IEEE80211_STYPE_DEAUTH >> 4), 499 }, 500 [NL80211_IFTYPE_P2P_DEVICE] = { 501 .tx = 0xffff, 502 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 503 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 504 }, 505 }; 506 507 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 508 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 509 IEEE80211_HT_AMPDU_PARM_DENSITY, 510 511 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 512 IEEE80211_HT_CAP_MAX_AMSDU | 513 IEEE80211_HT_CAP_SGI_20 | 514 IEEE80211_HT_CAP_SGI_40 | 515 IEEE80211_HT_CAP_TX_STBC | 516 IEEE80211_HT_CAP_RX_STBC | 517 IEEE80211_HT_CAP_LDPC_CODING | 518 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 519 .mcs = { 520 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 521 0xff, 0xff, 0xff, 0xff, 0xff, }, 522 }, 523 }; 524 525 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 526 .vht_cap_info = 527 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 528 IEEE80211_VHT_CAP_SHORT_GI_80 | 529 IEEE80211_VHT_CAP_SHORT_GI_160 | 530 IEEE80211_VHT_CAP_RXSTBC_MASK | 531 IEEE80211_VHT_CAP_TXSTBC | 532 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 533 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 534 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 535 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 536 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 537 .supp_mcs = { 538 .rx_mcs_map = cpu_to_le16(~0), 539 .tx_mcs_map = cpu_to_le16(~0), 540 }, 541 }; 542 543 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 544 const struct ieee80211_ops *ops, 545 const char *requested_name) 546 { 547 struct ieee80211_local *local; 548 int priv_size, i; 549 struct wiphy *wiphy; 550 bool use_chanctx; 551 552 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 553 !ops->add_interface || !ops->remove_interface || 554 !ops->configure_filter)) 555 return NULL; 556 557 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 558 return NULL; 559 560 /* check all or no channel context operations exist */ 561 i = !!ops->add_chanctx + !!ops->remove_chanctx + 562 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 563 !!ops->unassign_vif_chanctx; 564 if (WARN_ON(i != 0 && i != 5)) 565 return NULL; 566 use_chanctx = i == 5; 567 568 /* Ensure 32-byte alignment of our private data and hw private data. 569 * We use the wiphy priv data for both our ieee80211_local and for 570 * the driver's private data 571 * 572 * In memory it'll be like this: 573 * 574 * +-------------------------+ 575 * | struct wiphy | 576 * +-------------------------+ 577 * | struct ieee80211_local | 578 * +-------------------------+ 579 * | driver's private data | 580 * +-------------------------+ 581 * 582 */ 583 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 584 585 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 586 587 if (!wiphy) 588 return NULL; 589 590 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 591 592 wiphy->privid = mac80211_wiphy_privid; 593 594 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 595 WIPHY_FLAG_4ADDR_AP | 596 WIPHY_FLAG_4ADDR_STATION | 597 WIPHY_FLAG_REPORTS_OBSS | 598 WIPHY_FLAG_OFFCHAN_TX; 599 600 if (!use_chanctx || ops->remain_on_channel) 601 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 602 603 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 604 NL80211_FEATURE_SAE | 605 NL80211_FEATURE_HT_IBSS | 606 NL80211_FEATURE_VIF_TXPOWER | 607 NL80211_FEATURE_MAC_ON_CREATE | 608 NL80211_FEATURE_USERSPACE_MPM | 609 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 610 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 611 wiphy_ext_feature_set(wiphy, 612 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 613 wiphy_ext_feature_set(wiphy, 614 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 615 wiphy_ext_feature_set(wiphy, 616 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 617 wiphy_ext_feature_set(wiphy, 618 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 619 620 if (!ops->hw_scan) { 621 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 622 NL80211_FEATURE_AP_SCAN; 623 /* 624 * if the driver behaves correctly using the probe request 625 * (template) from mac80211, then both of these should be 626 * supported even with hw scan - but let drivers opt in. 627 */ 628 wiphy_ext_feature_set(wiphy, 629 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 630 wiphy_ext_feature_set(wiphy, 631 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 632 } 633 634 if (!ops->set_key) 635 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 636 637 if (ops->wake_tx_queue) 638 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 639 640 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 641 642 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 643 644 local = wiphy_priv(wiphy); 645 646 if (sta_info_init(local)) 647 goto err_free; 648 649 local->hw.wiphy = wiphy; 650 651 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 652 653 local->ops = ops; 654 local->use_chanctx = use_chanctx; 655 656 /* 657 * We need a bit of data queued to build aggregates properly, so 658 * instruct the TCP stack to allow more than a single ms of data 659 * to be queued in the stack. The value is a bit-shift of 1 660 * second, so 7 is ~8ms of queued data. Only affects local TCP 661 * sockets. 662 * This is the default, anyhow - drivers may need to override it 663 * for local reasons (longer buffers, longer completion time, or 664 * similar). 665 */ 666 local->hw.tx_sk_pacing_shift = 7; 667 668 /* set up some defaults */ 669 local->hw.queues = 1; 670 local->hw.max_rates = 1; 671 local->hw.max_report_rates = 0; 672 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 673 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 674 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 675 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 676 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 677 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 678 IEEE80211_RADIOTAP_MCS_HAVE_GI | 679 IEEE80211_RADIOTAP_MCS_HAVE_BW; 680 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 681 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 682 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 683 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 684 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 685 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 686 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 687 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 688 689 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 690 691 wiphy->extended_capabilities = local->ext_capa; 692 wiphy->extended_capabilities_mask = local->ext_capa; 693 wiphy->extended_capabilities_len = 694 ARRAY_SIZE(local->ext_capa); 695 696 INIT_LIST_HEAD(&local->interfaces); 697 INIT_LIST_HEAD(&local->mon_list); 698 699 __hw_addr_init(&local->mc_list); 700 701 mutex_init(&local->iflist_mtx); 702 mutex_init(&local->mtx); 703 704 mutex_init(&local->key_mtx); 705 spin_lock_init(&local->filter_lock); 706 spin_lock_init(&local->rx_path_lock); 707 spin_lock_init(&local->queue_stop_reason_lock); 708 709 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 710 struct airtime_sched_info *air_sched = &local->airtime[i]; 711 712 air_sched->active_txqs = RB_ROOT_CACHED; 713 INIT_LIST_HEAD(&air_sched->active_list); 714 spin_lock_init(&air_sched->lock); 715 air_sched->aql_txq_limit_low = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 716 air_sched->aql_txq_limit_high = 717 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 718 } 719 720 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 721 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 722 atomic_set(&local->aql_total_pending_airtime, 0); 723 724 INIT_LIST_HEAD(&local->chanctx_list); 725 mutex_init(&local->chanctx_mtx); 726 727 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 728 729 INIT_WORK(&local->restart_work, ieee80211_restart_work); 730 731 INIT_WORK(&local->radar_detected_work, 732 ieee80211_dfs_radar_detected_work); 733 734 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 735 local->smps_mode = IEEE80211_SMPS_OFF; 736 737 INIT_WORK(&local->dynamic_ps_enable_work, 738 ieee80211_dynamic_ps_enable_work); 739 INIT_WORK(&local->dynamic_ps_disable_work, 740 ieee80211_dynamic_ps_disable_work); 741 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 742 743 INIT_WORK(&local->sched_scan_stopped_work, 744 ieee80211_sched_scan_stopped_work); 745 746 spin_lock_init(&local->ack_status_lock); 747 idr_init(&local->ack_status_frames); 748 749 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 750 skb_queue_head_init(&local->pending[i]); 751 atomic_set(&local->agg_queue_stop[i], 0); 752 } 753 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 754 755 if (ops->wake_tx_queue) 756 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 757 758 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 759 760 skb_queue_head_init(&local->skb_queue); 761 skb_queue_head_init(&local->skb_queue_unreliable); 762 763 ieee80211_alloc_led_names(local); 764 765 ieee80211_roc_setup(local); 766 767 local->hw.radiotap_timestamp.units_pos = -1; 768 local->hw.radiotap_timestamp.accuracy = -1; 769 770 return &local->hw; 771 err_free: 772 wiphy_free(wiphy); 773 return NULL; 774 } 775 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 776 777 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 778 { 779 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 780 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 781 int r = 0, w = 0; 782 u32 *suites; 783 static const u32 cipher_suites[] = { 784 /* keep WEP first, it may be removed below */ 785 WLAN_CIPHER_SUITE_WEP40, 786 WLAN_CIPHER_SUITE_WEP104, 787 WLAN_CIPHER_SUITE_TKIP, 788 WLAN_CIPHER_SUITE_CCMP, 789 WLAN_CIPHER_SUITE_CCMP_256, 790 WLAN_CIPHER_SUITE_GCMP, 791 WLAN_CIPHER_SUITE_GCMP_256, 792 793 /* keep last -- depends on hw flags! */ 794 WLAN_CIPHER_SUITE_AES_CMAC, 795 WLAN_CIPHER_SUITE_BIP_CMAC_256, 796 WLAN_CIPHER_SUITE_BIP_GMAC_128, 797 WLAN_CIPHER_SUITE_BIP_GMAC_256, 798 }; 799 800 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 801 local->hw.wiphy->cipher_suites) { 802 /* If the driver advertises, or doesn't support SW crypto, 803 * we only need to remove WEP if necessary. 804 */ 805 if (have_wep) 806 return 0; 807 808 /* well if it has _no_ ciphers ... fine */ 809 if (!local->hw.wiphy->n_cipher_suites) 810 return 0; 811 812 /* Driver provides cipher suites, but we need to exclude WEP */ 813 suites = kmemdup(local->hw.wiphy->cipher_suites, 814 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 815 GFP_KERNEL); 816 if (!suites) 817 return -ENOMEM; 818 819 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 820 u32 suite = local->hw.wiphy->cipher_suites[r]; 821 822 if (suite == WLAN_CIPHER_SUITE_WEP40 || 823 suite == WLAN_CIPHER_SUITE_WEP104) 824 continue; 825 suites[w++] = suite; 826 } 827 } else { 828 /* assign the (software supported and perhaps offloaded) 829 * 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 } 845 846 local->hw.wiphy->cipher_suites = suites; 847 local->hw.wiphy->n_cipher_suites = w; 848 local->wiphy_ciphers_allocated = true; 849 850 return 0; 851 } 852 853 int ieee80211_register_hw(struct ieee80211_hw *hw) 854 { 855 struct ieee80211_local *local = hw_to_local(hw); 856 int result, i; 857 enum nl80211_band band; 858 int channels, max_bitrates; 859 bool supp_ht, supp_vht, supp_he, supp_eht; 860 struct cfg80211_chan_def dflt_chandef = {}; 861 862 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 863 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 864 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 865 return -EINVAL; 866 867 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 868 (!local->ops->tdls_channel_switch || 869 !local->ops->tdls_cancel_channel_switch || 870 !local->ops->tdls_recv_channel_switch)) 871 return -EOPNOTSUPP; 872 873 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 874 !local->ops->set_frag_threshold)) 875 return -EINVAL; 876 877 if (WARN_ON(local->hw.wiphy->interface_modes & 878 BIT(NL80211_IFTYPE_NAN) && 879 (!local->ops->start_nan || !local->ops->stop_nan))) 880 return -EINVAL; 881 882 #ifdef CONFIG_PM 883 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 884 return -EINVAL; 885 #endif 886 887 if (!local->use_chanctx) { 888 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 889 const struct ieee80211_iface_combination *comb; 890 891 comb = &local->hw.wiphy->iface_combinations[i]; 892 893 if (comb->num_different_channels > 1) 894 return -EINVAL; 895 } 896 } else { 897 /* DFS is not supported with multi-channel combinations yet */ 898 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 899 const struct ieee80211_iface_combination *comb; 900 901 comb = &local->hw.wiphy->iface_combinations[i]; 902 903 if (comb->radar_detect_widths && 904 comb->num_different_channels > 1) 905 return -EINVAL; 906 } 907 } 908 909 /* Only HW csum features are currently compatible with mac80211 */ 910 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 911 return -EINVAL; 912 913 if (hw->max_report_rates == 0) 914 hw->max_report_rates = hw->max_rates; 915 916 local->rx_chains = 1; 917 918 /* 919 * generic code guarantees at least one band, 920 * set this very early because much code assumes 921 * that hw.conf.channel is assigned 922 */ 923 channels = 0; 924 max_bitrates = 0; 925 supp_ht = false; 926 supp_vht = false; 927 supp_he = false; 928 supp_eht = false; 929 for (band = 0; band < NUM_NL80211_BANDS; band++) { 930 struct ieee80211_supported_band *sband; 931 932 sband = local->hw.wiphy->bands[band]; 933 if (!sband) 934 continue; 935 936 if (!dflt_chandef.chan) { 937 /* 938 * Assign the first enabled channel to dflt_chandef 939 * from the list of channels 940 */ 941 for (i = 0; i < sband->n_channels; i++) 942 if (!(sband->channels[i].flags & 943 IEEE80211_CHAN_DISABLED)) 944 break; 945 /* if none found then use the first anyway */ 946 if (i == sband->n_channels) 947 i = 0; 948 cfg80211_chandef_create(&dflt_chandef, 949 &sband->channels[i], 950 NL80211_CHAN_NO_HT); 951 /* init channel we're on */ 952 if (!local->use_chanctx && !local->_oper_chandef.chan) { 953 local->hw.conf.chandef = dflt_chandef; 954 local->_oper_chandef = dflt_chandef; 955 } 956 local->monitor_chandef = dflt_chandef; 957 } 958 959 channels += sband->n_channels; 960 961 if (max_bitrates < sband->n_bitrates) 962 max_bitrates = sband->n_bitrates; 963 supp_ht = supp_ht || sband->ht_cap.ht_supported; 964 supp_vht = supp_vht || sband->vht_cap.vht_supported; 965 966 for (i = 0; i < sband->n_iftype_data; i++) { 967 const struct ieee80211_sband_iftype_data *iftd; 968 969 iftd = &sband->iftype_data[i]; 970 971 supp_he = supp_he || iftd->he_cap.has_he; 972 supp_eht = supp_eht || iftd->eht_cap.has_eht; 973 } 974 975 /* HT, VHT, HE require QoS, thus >= 4 queues */ 976 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 977 (supp_ht || supp_vht || supp_he))) 978 return -EINVAL; 979 980 /* EHT requires HE support */ 981 if (WARN_ON(supp_eht && !supp_he)) 982 return -EINVAL; 983 984 if (!sband->ht_cap.ht_supported) 985 continue; 986 987 /* TODO: consider VHT for RX chains, hopefully it's the same */ 988 local->rx_chains = 989 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 990 local->rx_chains); 991 992 /* no need to mask, SM_PS_DISABLED has all bits set */ 993 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 994 IEEE80211_HT_CAP_SM_PS_SHIFT; 995 } 996 997 /* if low-level driver supports AP, we also support VLAN. 998 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 999 * based on their support to transmit SW encrypted packets. 1000 */ 1001 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1002 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1003 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1004 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1005 } 1006 1007 /* mac80211 always supports monitor */ 1008 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1009 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1010 1011 /* mac80211 doesn't support more than one IBSS interface right now */ 1012 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1013 const struct ieee80211_iface_combination *c; 1014 int j; 1015 1016 c = &hw->wiphy->iface_combinations[i]; 1017 1018 for (j = 0; j < c->n_limits; j++) 1019 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1020 c->limits[j].max > 1) 1021 return -EINVAL; 1022 } 1023 1024 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1025 sizeof(void *) * channels, GFP_KERNEL); 1026 if (!local->int_scan_req) 1027 return -ENOMEM; 1028 1029 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1030 if (!local->hw.wiphy->bands[band]) 1031 continue; 1032 local->int_scan_req->rates[band] = (u32) -1; 1033 } 1034 1035 #ifndef CONFIG_MAC80211_MESH 1036 /* mesh depends on Kconfig, but drivers should set it if they want */ 1037 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1038 #endif 1039 1040 /* if the underlying driver supports mesh, mac80211 will (at least) 1041 * provide routing of mesh authentication frames to userspace */ 1042 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1043 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1044 1045 /* mac80211 supports control port protocol changing */ 1046 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1047 1048 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1049 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1050 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1051 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1052 if (hw->max_signal <= 0) { 1053 result = -EINVAL; 1054 goto fail_workqueue; 1055 } 1056 } 1057 1058 /* Mac80211 and therefore all drivers using SW crypto only 1059 * are able to handle PTK rekeys and Extended Key ID. 1060 */ 1061 if (!local->ops->set_key) { 1062 wiphy_ext_feature_set(local->hw.wiphy, 1063 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1064 wiphy_ext_feature_set(local->hw.wiphy, 1065 NL80211_EXT_FEATURE_EXT_KEY_ID); 1066 } 1067 1068 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1069 wiphy_ext_feature_set(local->hw.wiphy, 1070 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1071 1072 /* 1073 * Calculate scan IE length -- we need this to alloc 1074 * memory and to subtract from the driver limit. It 1075 * includes the DS Params, (extended) supported rates, and HT 1076 * information -- SSID is the driver's responsibility. 1077 */ 1078 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1079 3 /* DS Params */; 1080 if (supp_ht) 1081 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1082 1083 if (supp_vht) 1084 local->scan_ies_len += 1085 2 + sizeof(struct ieee80211_vht_cap); 1086 1087 /* 1088 * HE cap element is variable in size - set len to allow max size */ 1089 if (supp_he) { 1090 local->scan_ies_len += 1091 3 + sizeof(struct ieee80211_he_cap_elem) + 1092 sizeof(struct ieee80211_he_mcs_nss_supp) + 1093 IEEE80211_HE_PPE_THRES_MAX_LEN; 1094 1095 if (supp_eht) 1096 local->scan_ies_len += 1097 3 + sizeof(struct ieee80211_eht_cap_elem) + 1098 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1099 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1100 } 1101 1102 if (!local->ops->hw_scan) { 1103 /* For hw_scan, driver needs to set these up. */ 1104 local->hw.wiphy->max_scan_ssids = 4; 1105 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1106 } 1107 1108 /* 1109 * If the driver supports any scan IEs, then assume the 1110 * limit includes the IEs mac80211 will add, otherwise 1111 * leave it at zero and let the driver sort it out; we 1112 * still pass our IEs to the driver but userspace will 1113 * not be allowed to in that case. 1114 */ 1115 if (local->hw.wiphy->max_scan_ie_len) 1116 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1117 1118 result = ieee80211_init_cipher_suites(local); 1119 if (result < 0) 1120 goto fail_workqueue; 1121 1122 if (!local->ops->remain_on_channel) 1123 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1124 1125 /* mac80211 based drivers don't support internal TDLS setup */ 1126 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1127 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1128 1129 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1130 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1131 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1132 1133 /* mac80211 supports multi BSSID, if the driver supports it */ 1134 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1135 local->hw.wiphy->support_mbssid = true; 1136 if (ieee80211_hw_check(&local->hw, 1137 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1138 local->hw.wiphy->support_only_he_mbssid = true; 1139 else 1140 local->ext_capa[2] |= 1141 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1142 } 1143 1144 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1145 1146 /* 1147 * We use the number of queues for feature tests (QoS, HT) internally 1148 * so restrict them appropriately. 1149 */ 1150 if (hw->queues > IEEE80211_MAX_QUEUES) 1151 hw->queues = IEEE80211_MAX_QUEUES; 1152 1153 local->workqueue = 1154 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1155 if (!local->workqueue) { 1156 result = -ENOMEM; 1157 goto fail_workqueue; 1158 } 1159 1160 /* 1161 * The hardware needs headroom for sending the frame, 1162 * and we need some headroom for passing the frame to monitor 1163 * interfaces, but never both at the same time. 1164 */ 1165 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1166 IEEE80211_TX_STATUS_HEADROOM); 1167 1168 /* 1169 * if the driver doesn't specify a max listen interval we 1170 * use 5 which should be a safe default 1171 */ 1172 if (local->hw.max_listen_interval == 0) 1173 local->hw.max_listen_interval = 5; 1174 1175 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1176 1177 local->dynamic_ps_forced_timeout = -1; 1178 1179 if (!local->hw.max_nan_de_entries) 1180 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1181 1182 if (!local->hw.weight_multiplier) 1183 local->hw.weight_multiplier = 1; 1184 1185 ieee80211_wep_init(local); 1186 1187 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1188 1189 ieee80211_led_init(local); 1190 1191 result = ieee80211_txq_setup_flows(local); 1192 if (result) 1193 goto fail_flows; 1194 1195 rtnl_lock(); 1196 result = ieee80211_init_rate_ctrl_alg(local, 1197 hw->rate_control_algorithm); 1198 rtnl_unlock(); 1199 if (result < 0) { 1200 wiphy_debug(local->hw.wiphy, 1201 "Failed to initialize rate control algorithm\n"); 1202 goto fail_rate; 1203 } 1204 1205 if (local->rate_ctrl) { 1206 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1207 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1208 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1209 } 1210 1211 /* 1212 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1213 * or have it when we don't, copy the sband structure and set/clear it. 1214 * This is necessary because rate scaling algorithms could be switched 1215 * and have different support values. 1216 * Print a message so that in the common case the reallocation can be 1217 * avoided. 1218 */ 1219 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1220 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1221 struct ieee80211_supported_band *sband; 1222 bool local_cap, ie_cap; 1223 1224 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1225 1226 sband = local->hw.wiphy->bands[band]; 1227 if (!sband || !sband->vht_cap.vht_supported) 1228 continue; 1229 1230 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1231 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1232 1233 if (local_cap == ie_cap) 1234 continue; 1235 1236 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1237 if (!sband) { 1238 result = -ENOMEM; 1239 goto fail_rate; 1240 } 1241 1242 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1243 band); 1244 1245 sband->vht_cap.vht_mcs.tx_highest ^= 1246 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1247 1248 local->hw.wiphy->bands[band] = sband; 1249 local->sband_allocated |= BIT(band); 1250 } 1251 1252 result = wiphy_register(local->hw.wiphy); 1253 if (result < 0) 1254 goto fail_wiphy_register; 1255 1256 debugfs_hw_add(local); 1257 rate_control_add_debugfs(local); 1258 1259 rtnl_lock(); 1260 wiphy_lock(hw->wiphy); 1261 1262 /* add one default STA interface if supported */ 1263 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1264 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1265 struct vif_params params = {0}; 1266 1267 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1268 NL80211_IFTYPE_STATION, ¶ms); 1269 if (result) 1270 wiphy_warn(local->hw.wiphy, 1271 "Failed to add default virtual iface\n"); 1272 } 1273 1274 wiphy_unlock(hw->wiphy); 1275 rtnl_unlock(); 1276 1277 #ifdef CONFIG_INET 1278 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1279 result = register_inetaddr_notifier(&local->ifa_notifier); 1280 if (result) 1281 goto fail_ifa; 1282 #endif 1283 1284 #if IS_ENABLED(CONFIG_IPV6) 1285 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1286 result = register_inet6addr_notifier(&local->ifa6_notifier); 1287 if (result) 1288 goto fail_ifa6; 1289 #endif 1290 1291 return 0; 1292 1293 #if IS_ENABLED(CONFIG_IPV6) 1294 fail_ifa6: 1295 #ifdef CONFIG_INET 1296 unregister_inetaddr_notifier(&local->ifa_notifier); 1297 #endif 1298 #endif 1299 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1300 fail_ifa: 1301 #endif 1302 wiphy_unregister(local->hw.wiphy); 1303 fail_wiphy_register: 1304 rtnl_lock(); 1305 rate_control_deinitialize(local); 1306 ieee80211_remove_interfaces(local); 1307 rtnl_unlock(); 1308 fail_rate: 1309 fail_flows: 1310 ieee80211_led_exit(local); 1311 destroy_workqueue(local->workqueue); 1312 fail_workqueue: 1313 if (local->wiphy_ciphers_allocated) 1314 kfree(local->hw.wiphy->cipher_suites); 1315 kfree(local->int_scan_req); 1316 return result; 1317 } 1318 EXPORT_SYMBOL(ieee80211_register_hw); 1319 1320 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1321 { 1322 struct ieee80211_local *local = hw_to_local(hw); 1323 1324 tasklet_kill(&local->tx_pending_tasklet); 1325 tasklet_kill(&local->tasklet); 1326 1327 #ifdef CONFIG_INET 1328 unregister_inetaddr_notifier(&local->ifa_notifier); 1329 #endif 1330 #if IS_ENABLED(CONFIG_IPV6) 1331 unregister_inet6addr_notifier(&local->ifa6_notifier); 1332 #endif 1333 1334 rtnl_lock(); 1335 1336 /* 1337 * At this point, interface list manipulations are fine 1338 * because the driver cannot be handing us frames any 1339 * more and the tasklet is killed. 1340 */ 1341 ieee80211_remove_interfaces(local); 1342 1343 rtnl_unlock(); 1344 1345 cancel_delayed_work_sync(&local->roc_work); 1346 cancel_work_sync(&local->restart_work); 1347 cancel_work_sync(&local->reconfig_filter); 1348 flush_work(&local->sched_scan_stopped_work); 1349 flush_work(&local->radar_detected_work); 1350 1351 ieee80211_clear_tx_pending(local); 1352 rate_control_deinitialize(local); 1353 1354 if (skb_queue_len(&local->skb_queue) || 1355 skb_queue_len(&local->skb_queue_unreliable)) 1356 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1357 skb_queue_purge(&local->skb_queue); 1358 skb_queue_purge(&local->skb_queue_unreliable); 1359 1360 wiphy_unregister(local->hw.wiphy); 1361 destroy_workqueue(local->workqueue); 1362 ieee80211_led_exit(local); 1363 kfree(local->int_scan_req); 1364 } 1365 EXPORT_SYMBOL(ieee80211_unregister_hw); 1366 1367 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1368 { 1369 WARN_ONCE(1, "Have pending ack frames!\n"); 1370 kfree_skb(p); 1371 return 0; 1372 } 1373 1374 void ieee80211_free_hw(struct ieee80211_hw *hw) 1375 { 1376 struct ieee80211_local *local = hw_to_local(hw); 1377 enum nl80211_band band; 1378 1379 mutex_destroy(&local->iflist_mtx); 1380 mutex_destroy(&local->mtx); 1381 1382 if (local->wiphy_ciphers_allocated) 1383 kfree(local->hw.wiphy->cipher_suites); 1384 1385 idr_for_each(&local->ack_status_frames, 1386 ieee80211_free_ack_frame, NULL); 1387 idr_destroy(&local->ack_status_frames); 1388 1389 sta_info_stop(local); 1390 1391 ieee80211_free_led_names(local); 1392 1393 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1394 if (!(local->sband_allocated & BIT(band))) 1395 continue; 1396 kfree(local->hw.wiphy->bands[band]); 1397 } 1398 1399 wiphy_free(local->hw.wiphy); 1400 } 1401 EXPORT_SYMBOL(ieee80211_free_hw); 1402 1403 static int __init ieee80211_init(void) 1404 { 1405 struct sk_buff *skb; 1406 int ret; 1407 1408 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1409 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1410 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1411 1412 ret = rc80211_minstrel_init(); 1413 if (ret) 1414 return ret; 1415 1416 ret = ieee80211_iface_init(); 1417 if (ret) 1418 goto err_netdev; 1419 1420 return 0; 1421 err_netdev: 1422 rc80211_minstrel_exit(); 1423 1424 return ret; 1425 } 1426 1427 static void __exit ieee80211_exit(void) 1428 { 1429 rc80211_minstrel_exit(); 1430 1431 ieee80211s_stop(); 1432 1433 ieee80211_iface_exit(); 1434 1435 rcu_barrier(); 1436 } 1437 1438 1439 subsys_initcall(ieee80211_init); 1440 module_exit(ieee80211_exit); 1441 1442 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1443 MODULE_LICENSE("GPL"); 1444