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 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 n_suites = 0, 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 if (!local->hw.cipher_schemes) { 828 /* If the driver doesn't have cipher schemes, there's nothing 829 * else to do other than assign the (software supported and 830 * perhaps offloaded) cipher suites. 831 */ 832 local->hw.wiphy->cipher_suites = cipher_suites; 833 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 834 835 if (!have_mfp) 836 local->hw.wiphy->n_cipher_suites -= 4; 837 838 if (!have_wep) { 839 local->hw.wiphy->cipher_suites += 2; 840 local->hw.wiphy->n_cipher_suites -= 2; 841 } 842 843 /* not dynamically allocated, so just return */ 844 return 0; 845 } else { 846 const struct ieee80211_cipher_scheme *cs; 847 848 cs = local->hw.cipher_schemes; 849 850 /* Driver specifies cipher schemes only (but not cipher suites 851 * including the schemes) 852 * 853 * We start counting ciphers defined by schemes, TKIP, CCMP, 854 * CCMP-256, GCMP, and GCMP-256 855 */ 856 n_suites = local->hw.n_cipher_schemes + 5; 857 858 /* check if we have WEP40 and WEP104 */ 859 if (have_wep) 860 n_suites += 2; 861 862 /* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128, 863 * BIP-GMAC-256 864 */ 865 if (have_mfp) 866 n_suites += 4; 867 868 suites = kmalloc_array(n_suites, sizeof(u32), GFP_KERNEL); 869 if (!suites) 870 return -ENOMEM; 871 872 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 873 suites[w++] = WLAN_CIPHER_SUITE_CCMP_256; 874 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 875 suites[w++] = WLAN_CIPHER_SUITE_GCMP; 876 suites[w++] = WLAN_CIPHER_SUITE_GCMP_256; 877 878 if (have_wep) { 879 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 880 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 881 } 882 883 if (have_mfp) { 884 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 885 suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256; 886 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128; 887 suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256; 888 } 889 890 for (r = 0; r < local->hw.n_cipher_schemes; r++) { 891 suites[w++] = cs[r].cipher; 892 if (WARN_ON(cs[r].pn_len > IEEE80211_MAX_PN_LEN)) { 893 kfree(suites); 894 return -EINVAL; 895 } 896 } 897 } 898 899 local->hw.wiphy->cipher_suites = suites; 900 local->hw.wiphy->n_cipher_suites = w; 901 local->wiphy_ciphers_allocated = true; 902 903 return 0; 904 } 905 906 int ieee80211_register_hw(struct ieee80211_hw *hw) 907 { 908 struct ieee80211_local *local = hw_to_local(hw); 909 int result, i; 910 enum nl80211_band band; 911 int channels, max_bitrates; 912 bool supp_ht, supp_vht, supp_he, supp_eht; 913 struct cfg80211_chan_def dflt_chandef = {}; 914 915 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 916 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 917 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 918 return -EINVAL; 919 920 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 921 (!local->ops->tdls_channel_switch || 922 !local->ops->tdls_cancel_channel_switch || 923 !local->ops->tdls_recv_channel_switch)) 924 return -EOPNOTSUPP; 925 926 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 927 !local->ops->set_frag_threshold)) 928 return -EINVAL; 929 930 if (WARN_ON(local->hw.wiphy->interface_modes & 931 BIT(NL80211_IFTYPE_NAN) && 932 (!local->ops->start_nan || !local->ops->stop_nan))) 933 return -EINVAL; 934 935 #ifdef CONFIG_PM 936 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 937 return -EINVAL; 938 #endif 939 940 if (!local->use_chanctx) { 941 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 942 const struct ieee80211_iface_combination *comb; 943 944 comb = &local->hw.wiphy->iface_combinations[i]; 945 946 if (comb->num_different_channels > 1) 947 return -EINVAL; 948 } 949 } else { 950 /* DFS is not supported with multi-channel combinations yet */ 951 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 952 const struct ieee80211_iface_combination *comb; 953 954 comb = &local->hw.wiphy->iface_combinations[i]; 955 956 if (comb->radar_detect_widths && 957 comb->num_different_channels > 1) 958 return -EINVAL; 959 } 960 } 961 962 /* Only HW csum features are currently compatible with mac80211 */ 963 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 964 return -EINVAL; 965 966 if (hw->max_report_rates == 0) 967 hw->max_report_rates = hw->max_rates; 968 969 local->rx_chains = 1; 970 971 /* 972 * generic code guarantees at least one band, 973 * set this very early because much code assumes 974 * that hw.conf.channel is assigned 975 */ 976 channels = 0; 977 max_bitrates = 0; 978 supp_ht = false; 979 supp_vht = false; 980 supp_he = false; 981 supp_eht = false; 982 for (band = 0; band < NUM_NL80211_BANDS; band++) { 983 struct ieee80211_supported_band *sband; 984 985 sband = local->hw.wiphy->bands[band]; 986 if (!sband) 987 continue; 988 989 if (!dflt_chandef.chan) { 990 /* 991 * Assign the first enabled channel to dflt_chandef 992 * from the list of channels 993 */ 994 for (i = 0; i < sband->n_channels; i++) 995 if (!(sband->channels[i].flags & 996 IEEE80211_CHAN_DISABLED)) 997 break; 998 /* if none found then use the first anyway */ 999 if (i == sband->n_channels) 1000 i = 0; 1001 cfg80211_chandef_create(&dflt_chandef, 1002 &sband->channels[i], 1003 NL80211_CHAN_NO_HT); 1004 /* init channel we're on */ 1005 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1006 local->hw.conf.chandef = dflt_chandef; 1007 local->_oper_chandef = dflt_chandef; 1008 } 1009 local->monitor_chandef = dflt_chandef; 1010 } 1011 1012 channels += sband->n_channels; 1013 1014 if (max_bitrates < sband->n_bitrates) 1015 max_bitrates = sband->n_bitrates; 1016 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1017 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1018 1019 for (i = 0; i < sband->n_iftype_data; i++) { 1020 const struct ieee80211_sband_iftype_data *iftd; 1021 1022 iftd = &sband->iftype_data[i]; 1023 1024 supp_he = supp_he || iftd->he_cap.has_he; 1025 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1026 } 1027 1028 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1029 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1030 (supp_ht || supp_vht || supp_he))) 1031 return -EINVAL; 1032 1033 /* EHT requires HE support */ 1034 if (WARN_ON(supp_eht && !supp_he)) 1035 return -EINVAL; 1036 1037 if (!sband->ht_cap.ht_supported) 1038 continue; 1039 1040 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1041 local->rx_chains = 1042 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1043 local->rx_chains); 1044 1045 /* no need to mask, SM_PS_DISABLED has all bits set */ 1046 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1047 IEEE80211_HT_CAP_SM_PS_SHIFT; 1048 } 1049 1050 /* if low-level driver supports AP, we also support VLAN. 1051 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1052 * based on their support to transmit SW encrypted packets. 1053 */ 1054 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1055 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1056 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1057 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1058 } 1059 1060 /* mac80211 always supports monitor */ 1061 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1062 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1063 1064 /* mac80211 doesn't support more than one IBSS interface right now */ 1065 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1066 const struct ieee80211_iface_combination *c; 1067 int j; 1068 1069 c = &hw->wiphy->iface_combinations[i]; 1070 1071 for (j = 0; j < c->n_limits; j++) 1072 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1073 c->limits[j].max > 1) 1074 return -EINVAL; 1075 } 1076 1077 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1078 sizeof(void *) * channels, GFP_KERNEL); 1079 if (!local->int_scan_req) 1080 return -ENOMEM; 1081 1082 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1083 if (!local->hw.wiphy->bands[band]) 1084 continue; 1085 local->int_scan_req->rates[band] = (u32) -1; 1086 } 1087 1088 #ifndef CONFIG_MAC80211_MESH 1089 /* mesh depends on Kconfig, but drivers should set it if they want */ 1090 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1091 #endif 1092 1093 /* if the underlying driver supports mesh, mac80211 will (at least) 1094 * provide routing of mesh authentication frames to userspace */ 1095 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1096 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1097 1098 /* mac80211 supports control port protocol changing */ 1099 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1100 1101 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1102 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1103 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1104 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1105 if (hw->max_signal <= 0) { 1106 result = -EINVAL; 1107 goto fail_workqueue; 1108 } 1109 } 1110 1111 /* Mac80211 and therefore all drivers using SW crypto only 1112 * are able to handle PTK rekeys and Extended Key ID. 1113 */ 1114 if (!local->ops->set_key) { 1115 wiphy_ext_feature_set(local->hw.wiphy, 1116 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1117 wiphy_ext_feature_set(local->hw.wiphy, 1118 NL80211_EXT_FEATURE_EXT_KEY_ID); 1119 } 1120 1121 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1122 wiphy_ext_feature_set(local->hw.wiphy, 1123 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1124 1125 /* 1126 * Calculate scan IE length -- we need this to alloc 1127 * memory and to subtract from the driver limit. It 1128 * includes the DS Params, (extended) supported rates, and HT 1129 * information -- SSID is the driver's responsibility. 1130 */ 1131 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1132 3 /* DS Params */; 1133 if (supp_ht) 1134 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1135 1136 if (supp_vht) 1137 local->scan_ies_len += 1138 2 + sizeof(struct ieee80211_vht_cap); 1139 1140 /* 1141 * HE cap element is variable in size - set len to allow max size */ 1142 if (supp_he) { 1143 local->scan_ies_len += 1144 3 + sizeof(struct ieee80211_he_cap_elem) + 1145 sizeof(struct ieee80211_he_mcs_nss_supp) + 1146 IEEE80211_HE_PPE_THRES_MAX_LEN; 1147 1148 if (supp_eht) 1149 local->scan_ies_len += 1150 3 + sizeof(struct ieee80211_eht_cap_elem) + 1151 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1152 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1153 } 1154 1155 if (!local->ops->hw_scan) { 1156 /* For hw_scan, driver needs to set these up. */ 1157 local->hw.wiphy->max_scan_ssids = 4; 1158 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1159 } 1160 1161 /* 1162 * If the driver supports any scan IEs, then assume the 1163 * limit includes the IEs mac80211 will add, otherwise 1164 * leave it at zero and let the driver sort it out; we 1165 * still pass our IEs to the driver but userspace will 1166 * not be allowed to in that case. 1167 */ 1168 if (local->hw.wiphy->max_scan_ie_len) 1169 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1170 1171 if (WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 1172 local->hw.n_cipher_schemes))) { 1173 result = -EINVAL; 1174 goto fail_workqueue; 1175 } 1176 1177 result = ieee80211_init_cipher_suites(local); 1178 if (result < 0) 1179 goto fail_workqueue; 1180 1181 if (!local->ops->remain_on_channel) 1182 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1183 1184 /* mac80211 based drivers don't support internal TDLS setup */ 1185 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1186 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1187 1188 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1189 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1190 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1191 1192 /* mac80211 supports multi BSSID, if the driver supports it */ 1193 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1194 local->hw.wiphy->support_mbssid = true; 1195 if (ieee80211_hw_check(&local->hw, 1196 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1197 local->hw.wiphy->support_only_he_mbssid = true; 1198 else 1199 local->ext_capa[2] |= 1200 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1201 } 1202 1203 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1204 1205 /* 1206 * We use the number of queues for feature tests (QoS, HT) internally 1207 * so restrict them appropriately. 1208 */ 1209 if (hw->queues > IEEE80211_MAX_QUEUES) 1210 hw->queues = IEEE80211_MAX_QUEUES; 1211 1212 local->workqueue = 1213 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1214 if (!local->workqueue) { 1215 result = -ENOMEM; 1216 goto fail_workqueue; 1217 } 1218 1219 /* 1220 * The hardware needs headroom for sending the frame, 1221 * and we need some headroom for passing the frame to monitor 1222 * interfaces, but never both at the same time. 1223 */ 1224 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1225 IEEE80211_TX_STATUS_HEADROOM); 1226 1227 /* 1228 * if the driver doesn't specify a max listen interval we 1229 * use 5 which should be a safe default 1230 */ 1231 if (local->hw.max_listen_interval == 0) 1232 local->hw.max_listen_interval = 5; 1233 1234 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1235 1236 local->dynamic_ps_forced_timeout = -1; 1237 1238 if (!local->hw.max_nan_de_entries) 1239 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1240 1241 if (!local->hw.weight_multiplier) 1242 local->hw.weight_multiplier = 1; 1243 1244 ieee80211_wep_init(local); 1245 1246 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1247 1248 ieee80211_led_init(local); 1249 1250 result = ieee80211_txq_setup_flows(local); 1251 if (result) 1252 goto fail_flows; 1253 1254 rtnl_lock(); 1255 result = ieee80211_init_rate_ctrl_alg(local, 1256 hw->rate_control_algorithm); 1257 rtnl_unlock(); 1258 if (result < 0) { 1259 wiphy_debug(local->hw.wiphy, 1260 "Failed to initialize rate control algorithm\n"); 1261 goto fail_rate; 1262 } 1263 1264 if (local->rate_ctrl) { 1265 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1266 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1267 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1268 } 1269 1270 /* 1271 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1272 * or have it when we don't, copy the sband structure and set/clear it. 1273 * This is necessary because rate scaling algorithms could be switched 1274 * and have different support values. 1275 * Print a message so that in the common case the reallocation can be 1276 * avoided. 1277 */ 1278 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1279 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1280 struct ieee80211_supported_band *sband; 1281 bool local_cap, ie_cap; 1282 1283 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1284 1285 sband = local->hw.wiphy->bands[band]; 1286 if (!sband || !sband->vht_cap.vht_supported) 1287 continue; 1288 1289 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1290 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1291 1292 if (local_cap == ie_cap) 1293 continue; 1294 1295 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1296 if (!sband) { 1297 result = -ENOMEM; 1298 goto fail_rate; 1299 } 1300 1301 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1302 band); 1303 1304 sband->vht_cap.vht_mcs.tx_highest ^= 1305 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1306 1307 local->hw.wiphy->bands[band] = sband; 1308 local->sband_allocated |= BIT(band); 1309 } 1310 1311 result = wiphy_register(local->hw.wiphy); 1312 if (result < 0) 1313 goto fail_wiphy_register; 1314 1315 debugfs_hw_add(local); 1316 rate_control_add_debugfs(local); 1317 1318 rtnl_lock(); 1319 wiphy_lock(hw->wiphy); 1320 1321 /* add one default STA interface if supported */ 1322 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1323 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1324 struct vif_params params = {0}; 1325 1326 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1327 NL80211_IFTYPE_STATION, ¶ms); 1328 if (result) 1329 wiphy_warn(local->hw.wiphy, 1330 "Failed to add default virtual iface\n"); 1331 } 1332 1333 wiphy_unlock(hw->wiphy); 1334 rtnl_unlock(); 1335 1336 #ifdef CONFIG_INET 1337 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1338 result = register_inetaddr_notifier(&local->ifa_notifier); 1339 if (result) 1340 goto fail_ifa; 1341 #endif 1342 1343 #if IS_ENABLED(CONFIG_IPV6) 1344 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1345 result = register_inet6addr_notifier(&local->ifa6_notifier); 1346 if (result) 1347 goto fail_ifa6; 1348 #endif 1349 1350 return 0; 1351 1352 #if IS_ENABLED(CONFIG_IPV6) 1353 fail_ifa6: 1354 #ifdef CONFIG_INET 1355 unregister_inetaddr_notifier(&local->ifa_notifier); 1356 #endif 1357 #endif 1358 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1359 fail_ifa: 1360 #endif 1361 wiphy_unregister(local->hw.wiphy); 1362 fail_wiphy_register: 1363 rtnl_lock(); 1364 rate_control_deinitialize(local); 1365 ieee80211_remove_interfaces(local); 1366 rtnl_unlock(); 1367 fail_rate: 1368 fail_flows: 1369 ieee80211_led_exit(local); 1370 destroy_workqueue(local->workqueue); 1371 fail_workqueue: 1372 if (local->wiphy_ciphers_allocated) 1373 kfree(local->hw.wiphy->cipher_suites); 1374 kfree(local->int_scan_req); 1375 return result; 1376 } 1377 EXPORT_SYMBOL(ieee80211_register_hw); 1378 1379 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1380 { 1381 struct ieee80211_local *local = hw_to_local(hw); 1382 1383 tasklet_kill(&local->tx_pending_tasklet); 1384 tasklet_kill(&local->tasklet); 1385 1386 #ifdef CONFIG_INET 1387 unregister_inetaddr_notifier(&local->ifa_notifier); 1388 #endif 1389 #if IS_ENABLED(CONFIG_IPV6) 1390 unregister_inet6addr_notifier(&local->ifa6_notifier); 1391 #endif 1392 1393 rtnl_lock(); 1394 1395 /* 1396 * At this point, interface list manipulations are fine 1397 * because the driver cannot be handing us frames any 1398 * more and the tasklet is killed. 1399 */ 1400 ieee80211_remove_interfaces(local); 1401 1402 rtnl_unlock(); 1403 1404 cancel_delayed_work_sync(&local->roc_work); 1405 cancel_work_sync(&local->restart_work); 1406 cancel_work_sync(&local->reconfig_filter); 1407 flush_work(&local->sched_scan_stopped_work); 1408 flush_work(&local->radar_detected_work); 1409 1410 ieee80211_clear_tx_pending(local); 1411 rate_control_deinitialize(local); 1412 1413 if (skb_queue_len(&local->skb_queue) || 1414 skb_queue_len(&local->skb_queue_unreliable)) 1415 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1416 skb_queue_purge(&local->skb_queue); 1417 skb_queue_purge(&local->skb_queue_unreliable); 1418 1419 wiphy_unregister(local->hw.wiphy); 1420 destroy_workqueue(local->workqueue); 1421 ieee80211_led_exit(local); 1422 kfree(local->int_scan_req); 1423 } 1424 EXPORT_SYMBOL(ieee80211_unregister_hw); 1425 1426 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1427 { 1428 WARN_ONCE(1, "Have pending ack frames!\n"); 1429 kfree_skb(p); 1430 return 0; 1431 } 1432 1433 void ieee80211_free_hw(struct ieee80211_hw *hw) 1434 { 1435 struct ieee80211_local *local = hw_to_local(hw); 1436 enum nl80211_band band; 1437 1438 mutex_destroy(&local->iflist_mtx); 1439 mutex_destroy(&local->mtx); 1440 1441 if (local->wiphy_ciphers_allocated) 1442 kfree(local->hw.wiphy->cipher_suites); 1443 1444 idr_for_each(&local->ack_status_frames, 1445 ieee80211_free_ack_frame, NULL); 1446 idr_destroy(&local->ack_status_frames); 1447 1448 sta_info_stop(local); 1449 1450 ieee80211_free_led_names(local); 1451 1452 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1453 if (!(local->sband_allocated & BIT(band))) 1454 continue; 1455 kfree(local->hw.wiphy->bands[band]); 1456 } 1457 1458 wiphy_free(local->hw.wiphy); 1459 } 1460 EXPORT_SYMBOL(ieee80211_free_hw); 1461 1462 static int __init ieee80211_init(void) 1463 { 1464 struct sk_buff *skb; 1465 int ret; 1466 1467 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1468 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1469 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1470 1471 ret = rc80211_minstrel_init(); 1472 if (ret) 1473 return ret; 1474 1475 ret = ieee80211_iface_init(); 1476 if (ret) 1477 goto err_netdev; 1478 1479 return 0; 1480 err_netdev: 1481 rc80211_minstrel_exit(); 1482 1483 return ret; 1484 } 1485 1486 static void __exit ieee80211_exit(void) 1487 { 1488 rc80211_minstrel_exit(); 1489 1490 ieee80211s_stop(); 1491 1492 ieee80211_iface_exit(); 1493 1494 rcu_barrier(); 1495 } 1496 1497 1498 subsys_initcall(ieee80211_init); 1499 module_exit(ieee80211_exit); 1500 1501 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1502 MODULE_LICENSE("GPL"); 1503